WorldWideScience

Sample records for automatic testing devices

  1. 30 CFR 75.1103-8 - Automatic fire sensor and warning device systems; examination and test requirements.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Automatic fire sensor and warning device...-UNDERGROUND COAL MINES Fire Protection § 75.1103-8 Automatic fire sensor and warning device systems; examination and test requirements. (a) Automatic fire sensor and warning device systems shall be examined at...

  2. System for measurement and automatic regulation of gas flow within an oil aging test device

    Directory of Open Access Journals (Sweden)

    Žigić Aleksandar

    2014-01-01

    Full Text Available This paper describes a system within an oil aging test device that serves for measurement and automatic regulation of gas flow. Following an already realized system that continuously monitors, logs, and regulates transformer oil temperature during the aging process and maintains temperature consistency within strict limits, a model of a flow meter and regulator of air or oxygen through transformer oil samples is developed. A special feature of the implemented system is the measurement of very small gas flows. A short technical description of the realized system is given with a functional block diagram. The basic technical characteristics of the system are specified, and the operating principles and application of the system are described. The paper also gives performance test results in a real exploitation environment.

  3. Research methodology simplification for teaching purposes illustrated by clutch automatic control device testing

    Science.gov (United States)

    Wojs, J.

    2016-09-01

    The paper proves that simplified, shorter examination of an object, feasible in laboratory classes, can produce results similar to those reached in scientific investigation of the device using extensive equipment. A thorough investigation of an object, an automatic clutch device in this case, enabled identifying the magnitudes that most significantly affect its operation. The knowledge of these most sensitive magnitudes allows focusing in the teaching process on simplified measurement of only selected magnitudes and verifying the given object in the positive or negative.

  4. Automatic agar tray inoculation device

    Science.gov (United States)

    Wilkins, J. R.; Mills, S. M.

    1972-01-01

    Automatic agar tray inoculation device is simple in design and foolproof in operation. It employs either conventional inoculating loop or cotton swab for uniform inoculation of agar media, and it allows technician to carry on with other activities while tray is being inoculated.

  5. Design of Pneumatic Device of the Automatic Transmission Performance Test-bed%气动自动变速器试验台架的设计

    Institute of Scientific and Technical Information of China (English)

    王利利

    2012-01-01

    根据自动变速器的工作原理特性,结合自动变速器的专业教学实践,分析了目前大多数变速器解剖试验台架的缺点,设计了以气压为动力传动介质的自动变速器解剖运行试验台.气动自动变速器实物解剖试验台架能实现动态演示,突破了教学上的难点,提高了学生的学习兴趣,取得了较好的试验教学效果.%According to the work principle of automatic transmission,combined with the experimental teaching of automatic transmission, the current most transmission test-bed shortcomings were analyzed. An automat transmission test-bed introducing of pneumatic device was designed. The test-bed can realize the dynamic demonstration and break through the teaching difficulty, which enables students to improve the study interest, and get better effects of teaching.

  6. Semiautomatic device tests components with biaxial leads

    Science.gov (United States)

    Marshall, T. C.

    1966-01-01

    Semiautomatic device with a four-terminal network tests quantities of components having biaxial leads. The four-terminal network permits the testing of components in different environments. This device is easily modified for completely automatic operation.

  7. 49 CFR 395.15 - Automatic on-board recording devices.

    Science.gov (United States)

    2010-10-01

    ... certifying that the design of the automatic on-board recorder has been sufficiently tested to meet the... 49 Transportation 5 2010-10-01 2010-10-01 false Automatic on-board recording devices. 395.15... OF SERVICE OF DRIVERS § 395.15 Automatic on-board recording devices. (a) Applicability and...

  8. 76 FR 58301 - Proposed Extension of Existing Information Collection; Automatic Fire Sensor and Warning Device...

    Science.gov (United States)

    2011-09-20

    ... Sensor and Warning Device Systems; Examination and Test Requirements ACTION: Notice of request for public... Coal Mining. OMB 1219-0145 has been renamed Automatic Fire Sensor and Warning Device Systems... to a task in July 2011; OMB 1219-0073 subsumed Sec. 75.1103-5(a)(2)(ii) Automatic fire sensor and...

  9. 30 CFR 77.410 - Mobile equipment; automatic warning devices.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Mobile equipment; automatic warning devices. 77... UNDERGROUND COAL MINES Safeguards for Mechanical Equipment § 77.410 Mobile equipment; automatic warning devices. (a) Mobile equipment such as front-end loaders, forklifts, tractors, graders, and trucks,...

  10. Color identification testing device

    Science.gov (United States)

    Brawner, E. L.; Martin, R.; Pate, W.

    1970-01-01

    Testing device, which determines ability of a technician to identify color-coded electric wires, is superior to standard color blindness tests. It tests speed of wire selection, detects partial color blindness, allows rapid testing, and may be administered by a color blind person.

  11. Automatic device for maintenance on safety relief valve

    Energy Technology Data Exchange (ETDEWEB)

    Fujio, M. [Okano Valve Mfg. Co. Ltd., Kitakyushu, Fukuoka (Japan)

    1996-02-01

    This system offers shorter, labor-saving periodic inspection of nuclear power plants particularly for maintenance of in the BWR plant. This automatic device has the following performance features. (author).

  12. Automatic Testing of a CANopen Node

    OpenAIRE

    Liang, Hui

    2013-01-01

    This Bachelor’s thesis was commissioned by TK Engineering Oy in Vaasa. The goals of the thesis were to test a prototype CANopen node, called UWASA Node for conformance to the CiA 301 standard, and to develop the automatic performance test software and the automatic CiA 401 test software. A test report that describes to the designer what needs to be corrected and improved is made in this thesis. For the CiA 301 test there is a CANopen conformance test tool that can be used. The automatic perfo...

  13. Natural language processing techniques for automatic test ...

    African Journals Online (AJOL)

    Journal of Computer Science and Its Application ... The questions were generated by first extracting the text from the materials supplied by the ... Keywords: Discourse Connectives, Machine Learning, Automatic Test Generation E-Learning.

  14. Design and implementation of automatic shading device for diffuse radiation measurement

    Institute of Scientific and Technical Information of China (English)

    LYU; Wenhua; BIAN; Zeqiang; CHONG; Wei

    2015-01-01

    Considering the problem of too large area the shading disc covered,complex shadow band coefficients and too big diffuse radiation measurement bias,an automatic shading device for diffuse radiometer is designed and realized. Set a shading ball on the automatic sun tracker,drive linkage parallelogram structure with the declination axis arm,the shading ball can rotate synchronously with the motion of the sun and shade beam radiation measured with pyranometer,thus shading beam radiation and measuring diffuse radiation can be realized automatically. The comparison test results show that the automatic shading device can realize diffuse radiation measurement automatically,the accuracy of diffuse radiation readings can get a 18. 7% improvement compared with traditional measure system,greatly improves the reliability and accuracy of the diffuse radiation measurement.

  15. B Development of Automatic Load & Temperature Recording Device for Thermo-Mechanic Testing Machine%热机试验设备负荷及温度自动记录装置的研制

    Institute of Scientific and Technical Information of China (English)

    杨利萍

    2001-01-01

    An automatic load & temperature recording device was developed to meet relevant thermo-mechanical test standard.The technical parameters, basic service mechanism, commissioning and service of such a device are presen ted.%在分析热机试验标准及熟悉试验设备的基础上,进行了热机试验设备负荷及温度自 动记录装置的研制。笔者介绍了热机试验设备负荷及温度自动记录装置的技术参数要求、基 本工作原理、调试过程和实际应用效果。

  16. Automatic Testing with Formal Methods

    NARCIS (Netherlands)

    Tretmans, G.J.; Belinfante, Axel

    1999-01-01

    The use of formal system specifications makes it possible to automate the derivation of test cases from specifications. This allows to automate the whole testing process, not only the test execution part of it. This paper presents the state of the art and future perspectives in testing based on

  17. Research and implementation of software automatic test

    Science.gov (United States)

    Li-hong, LIAN

    2017-06-01

    With the fast development in IT technology nowadays, software is increasingly complex and large. Hundreds of people in the development team, thousands of modules and interfaces, across geographies and systems user are no longer a fresh thing. All of these put forward higher requirements for software testing. Due to the low cost of implementation and the advantage of effective inheritance and accumulation of test assets, software automation testing has gradually become one of the important means to ensure the quality of software for IT enterprises. This paper analyzes the advantages of automatic test, common misconceptions; puts forward unsuitable application scenarios and the best time to intervene; focus on the analysis of the feasibility of judging the interface automation test; and puts forward the function and elements of interface automatic test tools to have; provides a reference for large-scale project interface automated testing tool selection or custom development.

  18. Testing Forms in Web Applications Automatically

    Institute of Scientific and Technical Information of China (English)

    XU Lei; XU Baowen

    2006-01-01

    Forms enhance both the dynamic and interactive abilities of Web applications and the system complexity. And it is especially important to test forms completely and thoroughly. Therefore, this paper discusses how to carry out the form testing by different methods in the related testing phases. Namely, at first, automatically abstracting forms in the Web pages by parsing the HTML documents; then, obtaining the testing data with a certain strategies, such as by requirement specifications, by mining users' before input information or by recording mechanism; and next executing the testing actions automatically due to the well-formed test cases; finally, a case study is given to illustrate the convenient and effective of these methods.

  19. A new portable device for automatic controlled-gradient cryopreservation of blood mononuclear cells

    DEFF Research Database (Denmark)

    Hviid, L; Albeck, G; Hansen, B

    1993-01-01

    , which has proved suitable for field conditions. We report here the development and testing of a similar micro-controller regulated device, allowing unattended and automatic controlled-gradient cell freezing. The equipment exploits the temperature gradient present between the liquid N2 surface...

  20. 30 CFR 75.1103-4 - Automatic fire sensor and warning device systems; installation; minimum requirements.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Automatic fire sensor and warning device...-UNDERGROUND COAL MINES Fire Protection § 75.1103-4 Automatic fire sensor and warning device systems; installation; minimum requirements. (a) Effective December 31, 2009, automatic fire sensor and warning device...

  1. 30 CFR 75.1103-3 - Automatic fire sensor and warning device systems; minimum requirements; general.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Automatic fire sensor and warning device...-UNDERGROUND COAL MINES Fire Protection § 75.1103-3 Automatic fire sensor and warning device systems; minimum requirements; general. Automatic fire sensor and warning device systems installed in belt haulageways of...

  2. Automatic Test Pattern Generation for Digital Circuits

    Directory of Open Access Journals (Sweden)

    S. Hemalatha

    2014-04-01

    Full Text Available Digital circuits complexity and density are increasing and at the same time it should have more quality and reliability. It leads with high test costs and makes the validation more complex. The main aim is to develop a complete behavioral fault simulation and automatic test pattern generation (ATPG system for digital circuits modeled in verilog and VHDL. An integrated Automatic Test Generation (ATG and Automatic Test Executing/Equipment (ATE system for complex boards is developed here. An approach to use memristors (resistors with memory in programmable analog circuits. The Main idea consists in a circuit design in which low voltages are applied to memristors during their operation as analog circuit elements and high voltages are used to program the memristor’s states. This way, as it was demonstrated in recent experiments, the state of memristors does not essentially change during analog mode operation. As an example of our approach, we have built several programmable analog circuits demonstrating memristor -based programming of threshold, gain and frequency. In these circuits the role of memristor is played by a memristor emulator developed by us. A multiplexer is developed to generate a class of minimum transition sequences. The entire hardware is realized as digital logical circuits and the test results are simulated in Model sim software. The results of this research show that behavioral fault simulation will remain as a highly attractive alternative for the future generation of VLSI and system-on-chips (SoC.

  3. Automatic generation of combinatorial test data

    CERN Document Server

    Zhang, Jian; Ma, Feifei

    2014-01-01

    This book reviews the state-of-the-art in combinatorial testing, with particular emphasis on the automatic generation of test data. It describes the most commonly used approaches in this area - including algebraic construction, greedy methods, evolutionary computation, constraint solving and optimization - and explains major algorithms with examples. In addition, the book lists a number of test generation tools, as well as benchmarks and applications. Addressing a multidisciplinary topic, it will be of particular interest to researchers and professionals in the areas of software testing, combi

  4. New automatic minidisk infiltrometer: design and testing

    Directory of Open Access Journals (Sweden)

    Klípa Vladimír

    2015-06-01

    Full Text Available Soil hydraulic conductivity is a key parameter to predict water flow through the soil profile. We have developed an automatic minidisk infiltrometer (AMI to enable easy measurement of unsaturated hydraulic conductivity using the tension infiltrometer method in the field. AMI senses the cumulative infiltration by recording change in buoyancy force acting on a vertical solid bar fixed in the reservoir tube of the infiltrometer. Performance of the instrument was tested in the laboratory and in two contrasting catchments at three sites with different land use. Hydraulic conductivities determined using AMI were compared with earlier manually taken readings. The results of laboratory testing demonstrated high accuracy and robustness of the AMI measurement. Field testing of AMI proved the suitability of the instrument for use in the determination of sorptivity and near saturated hydraulic conductivity

  5. Portable Heat Pump Testing Device

    Directory of Open Access Journals (Sweden)

    Kłosowiak R.

    2015-08-01

    Full Text Available The aim of this paper is to present the design and working principle of a portable testing device for heat pumps in the energy recirculation system. The presented test stand can be used for any refrigerating/reverse flow cycle device to calculate the device energy balance. The equipment is made of two portable containers of the capacity of 250 liters to simulate the air heat source and ground heat source with a system of temperature stabilization, compressor heat pump of the coefficient of performance (COP of = 4.3, a failsafe system and a control and measurement system.

  6. Automatic Bluetooth testing for mobile multi-user applications

    Science.gov (United States)

    Luck, Dennis; Hörning, Henrik; Edlich, Stefan

    2008-02-01

    In this paper we present a simple approach for the development of multiuser and multimedia applications based on Bluetooth. One main obstacle for Bluetooth synchronization of mobile applications is the lack of a complete specification implementation. Nowadays these applications must be on market as fast as possible. Hence, developers must be able to test several dozens of mobile devices for their Bluetooth capability. And surprisingly, the capabilities differ not only between the Bluetooth specification 1.0 and 2.0. The current development was triggered by the development of mass applications as mobile multiuser games (e.g. Tetris). Our Application can be distributed on several mobile phones. If started, the Bluetooth applications try to connect each other and automatically start to detect device capabilities. These capabilities will be gathered and distributed to a server. The server performs statistical investigations and aggregates them to be presented as a report. The result is a faster development regarding mobile communications.

  7. A General Method for Module Automatic Testing in Avionics Systems

    Directory of Open Access Journals (Sweden)

    Li Ma

    2013-05-01

    Full Text Available The traditional Automatic Test Equipment (ATE systems are insufficient to cope with the challenges of testing more and more complex avionics systems. In this study, we propose a general method for module automatic testing in the avionics test platform based on PXI bus. We apply virtual instrument technology to realize the automatic testing and the fault reporting of signal performance. Taking the avionics bus ARINC429 as an example, we introduce the architecture of automatic test system as well as the implementation of algorithms in Lab VIEW. The comprehensive experiments show the proposed method can effectively accomplish the automatic testing and fault reporting of signal performance. It greatly improves the generality and reliability of ATE in avionics systems.

  8. Penetration testing using mobile devices

    CSIR Research Space (South Africa)

    Shelembe, S

    2012-10-01

    Full Text Available reliable, it was used in the early 90s ? Disadvantage: ? Fixed workstations ? PCs need larger space ? PC set-up time ? Not easy to hide ? Lack portability ? CSIR 2012 Slide 5 Traditional pen-testing is not complete - why? ? Banning laptops... is not enough, cell-phones can hack too ? Pocket sized device is more convenient, since it is easy to carry around at anytime ? A power plug is not innocent, need to look for activity other than just traditional PCs / devices ? CSIR 2012 Slide 6 Mobile...

  9. Measurement of radial artery spasm using an automatic pullback device.

    Science.gov (United States)

    Kiemeneij, F; Vajifdar, B U; Eccleshall, S C; Laarman, G; Slagboom, T; van der Wieken, R

    2001-12-01

    Current evaluation of radial artery spasm (RAS), a frequent finding during the transradial approach for coronary angiography and angioplasty (TRA), is subjective. A quantitative measure of RAS will help in evaluation and comparison of management strategies. The objectives of the study were to assess the feasibility and safety of using an automatic pullback device (APD) for removal of transradial introducer sheaths and to establish a parameter to quantify RAS. In 50 consecutive transradial procedures, the APD was used to measure the force required for sheath removal. The mean maximal pullback force (MPF) was 0.53 +/- 0.52 kg (range, 0.1-3.0 kg). In 48 (96%) cases, the MPF was reached within the first 5 sec of pullback. All patients with clinical RAS (n = 4) had an MPF greater than 1.0 kg, while the remaining had an MPF less than 1.0 kg. All patients with severe pain during sheath removal (n = 3) had an MPF greater than 1.0 kg, while no patient with an MPF less than 1.0 kg had severe pain. It is feasible and safe to remove transradial introducer sheaths using the APD. The MPF is achieved within the first 5 sec of pullback and is a reliable parameter to quantify RAS. An MPF more than 1.0 kg correlates with clinical RAS and is associated with severe pain during sheath removal.

  10. 110kV变电站备用电源自动切换装置应用试验%Application Test on Automatic Switching Device for Standby Power of 110 kV Substation

    Institute of Scientific and Technical Information of China (English)

    张晋滨

    2015-01-01

    The power supply mode of on-load automatic switching standby power is that the on-load automatic switching standby power works as the power supply in case of the breakdown of common power source to avoid the large-scale blackout and improve the power supply reliability and quality .Fast switchover device plays an important part in the power supply system ,whose switching success rate is essential to high-efficiency opera‐tion of the power supply system .By introducing the working principle of fast switchover mode ,the paper em‐phasizes its advantages over several other power switching modes and reaches the conclusion that the application of fast switchover device can better guarantee the normal operation of power supply system .%备用电源带负荷自动切换供电方式是:在常用电源故障失电的情况下,可以通过备用电源带负荷自动切换作为电源,避免全站(所)失电造成大面积的停电,从整体上提高供电可靠性,改善供电质量,从而确保矿井安全供电。快切装置是供电系统中的重要装置,本文介绍了快切装置的工作原理,得出了将快切装置运用于供电系统中可以更好地保证系统正常运行这一结论。

  11. Development of a doorframe-typed swinging seedling pick-up device for automatic field transplantation

    Energy Technology Data Exchange (ETDEWEB)

    Han, H.; Mao, H.; Hu, J.; Tian, K.

    2015-07-01

    A doorframe-typed swing seedling pick-up device for automatic field transplanters was developed and evaluated in a laboratory. The device, consisting of a path manipulator and two grippers, can move the pins slowly to extract seedlings from the tray cells and return quickly to the pick-up point for the next extraction. The path manipulator was constructed with the creative design of type-Ⅱ mechanism combination in series. It consists of an oscillating guide linkage mechanism and a grooved globoidal cam mechanism. The gripper is a pincette-type mechanism using the pick-up pins to penetrate into the root mass for seedling extraction. The dynamic analysis of the designed seedling pick-up device was simulated with ADAMS software. Being the first prototype, various performance tests under local production conditions were conducted to find out the optimal machine operation parameters and transplant production conditions. As the gripper with multiple fine pins was moved by the swing pick-up device, it can effectively complete the transplanting work cycle of extracting, transferring, and discharging a seedling. The laboratory evaluation showed that the pick-up device equipped with two grippers can extract 80 seedlings/min with a 90% success and a 3% failure in discharging seedlings, using 42-day-old tomato plantlets. The quality of extracting seedlings was satisfactory. (Author)

  12. Development of a doorframe-typed swinging seedling pick-up device for automatic field transplantation

    Directory of Open Access Journals (Sweden)

    Han Luhua

    2015-06-01

    Full Text Available A doorframe-typed swing seedling pick-up device for automatic field transplanters was developed and evaluated in a laboratory. The device, consisting of a path manipulator and two grippers, can move the pins slowly to extract seedlings from the tray cells and return quickly to the pick-up point for the next extraction. The path manipulator was constructed with the creative design of type-II mechanism combination in series. It consists of an oscillating guide linkage mechanism and a grooved globoidal cam mechanism. The gripper is a pincette-type mechanism using the pick-up pins to penetrate into the root mass for seedling extraction. The dynamic analysis of the designed seedling pick-up device was simulated with ADAMS software. Being the first prototype, various performance tests under local production conditions were conducted to find out the optimal machine operation parameters and transplant production conditions. As the gripper with multiple fine pins was moved by the swing pick-up device, it can effectively complete the transplanting work cycle of extracting, transferring, and discharging a seedling. The laboratory evaluation showed that the pick-up device equipped with two grippers can extract 80 seedlings/min with a 90% success and a 3% failure in discharging seedlings, using 42-day-old tomato plantlets. The quality of extracting seedlings was satisfactory.

  13. Formal Specification Based Automatic Test Generation for Embedded Network Systems

    Directory of Open Access Journals (Sweden)

    Eun Hye Choi

    2014-01-01

    Full Text Available Embedded systems have become increasingly connected and communicate with each other, forming large-scaled and complicated network systems. To make their design and testing more reliable and robust, this paper proposes a formal specification language called SENS and a SENS-based automatic test generation tool called TGSENS. Our approach is summarized as follows: (1 A user describes requirements of target embedded network systems by logical property-based constraints using SENS. (2 Given SENS specifications, test cases are automatically generated using a SAT-based solver. Filtering mechanisms to select efficient test cases are also available in our tool. (3 In addition, given a testing goal by the user, test sequences are automatically extracted from exhaustive test cases. We’ve implemented our approach and conducted several experiments on practical case studies. Through the experiments, we confirmed the efficiency of our approach in design and test generation of real embedded air-conditioning network systems.

  14. Automatic Test Case Generation of C Program Using CFG

    Directory of Open Access Journals (Sweden)

    Sangeeta Tanwer

    2010-07-01

    Full Text Available Software quality and assurance in a software company is the only way to gain the customer confidence by removing all possible errors. It can be done by automatic test case generation. Taking popularly C programs as tests object, this paper explores how to create CFG of a C program and generate automatic Test Cases. It explores the feasibility and nonfeasibility of path basis upon no. of iteration. First C is code converted to instrumented code. Then test cases are generated by using Symbolic Testing and random Testing. System is developed by using C#.net in Visual Studio 2008. In addition some future research directions are also explored.

  15. CURRENT STATE ANALYSIS OF AUTOMATIC BLOCK SYSTEM DEVICES, METHODS OF ITS SERVICE AND MONITORING

    Directory of Open Access Journals (Sweden)

    A. M. Beznarytnyy

    2014-01-01

    Full Text Available Purpose. Development of formalized description of automatic block system of numerical code based on the analysis of characteristic failures of automatic block system and procedure of its maintenance. Methodology. For this research a theoretical and analytical methods have been used. Findings. Typical failures of the automatic block systems were analyzed, as well as basic reasons of failure occur were found out. It was determined that majority of failures occurs due to defects of the maintenance system. Advantages and disadvantages of the current service technology of automatic block system were analyzed. Works that can be automatized by means of technical diagnostics were found out. Formal description of the numerical code of automatic block system as a graph in the state space of the system was carried out. Originality. The state graph of the numerical code of automatic block system that takes into account gradual transition from the serviceable condition to the loss of efficiency was offered. That allows selecting diagnostic information according to attributes and increasing the effectiveness of recovery operations in the case of a malfunction. Practical value. The obtained results of analysis and proposed the state graph can be used as the basis for the development of new means of diagnosing devices for automatic block system, which in turn will improve the efficiency and service of automatic block system devices in general.

  16. Optical Methods For Automatic Rating Of Engine Test Components

    Science.gov (United States)

    Pritchard, James R.; Moss, Brian C.

    1989-03-01

    In recent years, increasing commercial and legislative pressure on automotive engine manufacturers, including increased oil drain intervals, cleaner exhaust emissions and high specific power outputs, have led to increasing demands on lubricating oil performance. Lubricant performance is defined by bench engine tests run under closely controlled conditions. After test, engines are dismantled and the parts rated for wear and accumulation of deposit. This rating must be consistently carried out in laboratories throughout the world in order to ensure lubricant quality meeting the specified standards. To this end, rating technicians evaluate components, following closely defined procedures. This process is time consuming, inaccurate and subject to drift, requiring regular recalibration of raters by means of international rating workshops. This paper describes two instruments for automatic rating of engine parts. The first uses a laser to determine the degree of polishing of the engine cylinder bore, caused by the reciprocating action of piston. This instrument has been developed to prototype stage by the NDT Centre at Harwell under contract to Exxon Chemical, and is planned for production within the next twelve months. The second instrument uses red and green filtered light to determine the type, quality and position of deposit formed on the piston surfaces. The latter device has undergone feasibility study, but no prototype exists.

  17. Portable basketball rim testing device

    Science.gov (United States)

    Abbott, W. Bruce; Davis, Karl C.

    1993-01-01

    A portable basketball rim rebound testing device 10 is illustrated in two preferred embodiments for testing the rebound or energy absorption characteristics of a basketball rim 12 and its accompanying support to determine likely rebound or energy absorption charcteristics of the system. The apparatus 10 includes a depending frame 28 having a C-clamp 36 for releasably rigidly connecting the frame to the basketball rim 12. A glide weight 60 is mounted on a guide rod 52 permitting the weight 60 to be dropped against a calibrated spring 56 held on an abutment surface on the rod to generate for deflecting the basketball rim and then rebounding the weight upwardly. A photosensor 66 is mounted on the depending frame 28 to sense passage of reflective surfaces 75 on the weight to thereby obtain sufficient data to enable a processing means 26 to calculate the rebound velocity and relate it to an energy absorption percentage rate of the rim system 12. A readout is provided to display the energy absorption percentage.

  18. Development of an automatic calibration device for high-accuracy low temperature thermometers

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    Based on the analysis and investigation of calibration systems for high-accuracy low temperature thermometers,a new facility for automatic calibration of high-accuracy low temperature thermometers was developed.Continuous calibration for multiple points can be made automatically with this device.According to the thermophysical characteristics of the constant-temperature block in this device,segmented Fuzzy-PID (proportional-integral-differential) algorithm was applied.The experimental results showed that the temperature fluctuation was smaller than ±0.005 K in 30 min.Therefore,this new device can fully meet the calibration requirement of high-precision low temperature thermometers.

  19. An automatic synthesis method of compact models of integrated circuit devices based on equivalent circuits

    Science.gov (United States)

    Abramov, I. I.

    2006-05-01

    An automatic synthesis method of equivalent circuits of integrated circuit devices is described in the paper. This method is based on a physical approach to construction of finite-difference approximation to basic equations of semiconductor device physics. It allows to synthesize compact equivalent circuits of different devices automatically as alternative to, for example, sufficiently formal BSIM2 and BSIM3 models used in circuit simulation programs of SPICE type. The method is one of possible variants of general methodology for automatic synthesis of compact equivalent circuits of almost arbitrary devices and circuit-type structures of micro- and nanoelecronics [1]. The method is easily extended in the case of necessity to account thermal effects in integrated circuits. It was shown that its application would be especially perspective for analysis of integrated circuit fragments as a whole and for identification of significant collective physical effects, including parasitic effects in VLSI and ULSI. In the paper the examples illustrating possibilities of the method for automatic synthesis of compact equivalent circuits of some of semiconductor devices and integrated circuit devices are considered. Special attention is given to examples of integrated circuit devices for coarse grids of spatial discretization (less than 10 nodes).

  20. Automatic devices for electrochemical water treatment with cooling of electrolyte

    Directory of Open Access Journals (Sweden)

    Trišović Tomislav Lj.

    2016-01-01

    Full Text Available The most common disinfectants for water treatment are based on chlorine and its compounds. Practically, water treatments with chlorine compounds have no alternative, since they provide, in comparison to other effective processes such as ozonization or ultraviolet irradiation, high residual disinfection capacity. Unfortunately, all of chlorine-based compounds for disinfection tend to degrade during storage, thus reducing the concentration of active chlorine. Apart from degradation, additional problems are transportation, storage and handling of such hazardous compounds. Nowadays, a lot of attention is paid to the development of electrochemical devices for in situ production of chlorine dioxide or sodium hypochlorite as efficient disinfectants for water treatment. The most important part of such a device is the electrochemical reactor. Electrochemical reactor uses external source of direct current in order to produce disinfectants in electrochemical reactions occurring at the electrodes. Construction of an electrochemical device for water treatment is based on evaluation of optimal conditions for electrochemical reactions during continues production of disinfectants. The aim of this study was to develop a low-cost electrochemical device for the production of disinfectant, active chlorine, at the place of its usage, based on newly developed technical solutions and newest commercial components. The projected electrochemical device was constructed and mounted, and its operation was investigated. Investigations involved both functionality of individual components and device in general. The major goal of these investigations was to achieve maximal efficiency in extreme condition of elevated room temperature and humidity with a novel device construction involving coaxial heat exchanger at the solution inlet. Room operation of the proposed device was investigated when relative humidity was set to 90% and the ambient temperature of 38°C. The obtained

  1. Poster Abstract: Automatic Calibration of Device Attitude in Inertial Measurement Unit Based Traffic Probe Vehicles

    KAUST Repository

    Mousa, Mustafa

    2016-04-28

    Probe vehicles consist in mobile traffic sensor networks that evolve with the flow of vehicles, transmitting velocity and position measurements along their path, generated using GPSs. To address the urban positioning issues of GPSs, we propose to replace them with inertial measurement units onboard vehicles, to estimate vehicle location and attitude using inertial data only. While promising, this technology requires one to carefully calibrate the orientation of the device inside the vehicle to be able to process the acceleration and rate gyro data. In this article, we propose a scheme that can perform this calibration automatically by leveraging the kinematic constraints of ground vehicles, and that can be implemented on low-end computational platforms. Preliminary testing shows that the proposed scheme enables one to accurately estimate the actual accelerations and rotation rates in the vehicle coordinates. © 2016 IEEE.

  2. Cursor Control Device Test Battery

    Science.gov (United States)

    Holden, Kritina; Sandor, Aniko; Pace, John; Thompson, Shelby

    2013-01-01

    The test battery was developed to provide a standard procedure for cursor control device evaluation. The software was built in Visual Basic and consists of nine tasks and a main menu that integrates the set-up of the tasks. The tasks can be used individually, or in a series defined in the main menu. Task 1, the Unidirectional Pointing Task, tests the speed and accuracy of clicking on targets. Two rectangles with an adjustable width and adjustable center- to-center distance are presented. The task is to click back and forth between the two rectangles. Clicks outside of the rectangles are recorded as errors. Task 2, Multidirectional Pointing Task, measures speed and accuracy of clicking on targets approached from different angles. Twenty-five numbered squares of adjustable width are arranged around an adjustable diameter circle. The task is to point and click on the numbered squares (placed on opposite sides of the circle) in consecutive order. Clicks outside of the squares are recorded as errors. Task 3, Unidirectional (horizontal) Dragging Task, is similar to dragging a file into a folder on a computer desktop. Task 3 requires dragging a square of adjustable width from one rectangle and dropping it into another. The width of each rectangle is adjustable, as well as the distance between the two rectangles. Dropping the square outside of the rectangles is recorded as an error. Task 4, Unidirectional Path Following, is similar to Task 3. The task is to drag a square through a tunnel consisting of two lines. The size of the square and the width of the tunnel are adjustable. If the square touches any of the lines, it is counted as an error and the task is restarted. Task 5, Text Selection, involves clicking on a Start button, and then moving directly to the underlined portion of the displayed text and highlighting it. The pointing distance to the text is adjustable, as well as the to-be-selected font size and the underlined character length. If the selection does not

  3. A Device for Automatically Measuring and Supervising the Critical Care Patient’S Urine Output

    Directory of Open Access Journals (Sweden)

    Roemi Fernández

    2010-01-01

    Full Text Available Critical care units are equipped with commercial monitoring devices capable of sensing patients’ physiological parameters and supervising the achievement of the established therapeutic goals. This avoids human errors in this task and considerably decreases the workload of the healthcare staff. However, at present there still is a very relevant physiological parameter that is measured and supervised manually by the critical care units’ healthcare staff: urine output. This paper presents a patent-pending device capable of automatically recording and supervising the urine output of a critical care patient. A high precision scale is used to measure the weight of a commercial urine meter. On the scale’s pan there is a support frame made up of Bosch profiles that isolates the scale from force transmission from the patient’s bed, and guarantees that the urine flows properly through the urine meter input tube. The scale’s readings are sent to a PC via Bluetooth where an application supervises the achievement of the therapeutic goals. The device is currently undergoing tests at a research unit associated with the University Hospital of Getafe in Spain.

  4. Intelligent neural network classifier for automatic testing

    Science.gov (United States)

    Bai, Baoxing; Yu, Heping

    1996-10-01

    This paper is concerned with an application of a multilayer feedforward neural network for the vision detection of industrial pictures, and introduces a high characteristics image processing and recognizing system which can be used for real-time testing blemishes, streaks and cracks, etc. on the inner walls of high-accuracy pipes. To take full advantage of the functions of the artificial neural network, such as the information distributed memory, large scale self-adapting parallel processing, high fault-tolerance ability, this system uses a multilayer perceptron as a regular detector to extract features of the images to be inspected and classify them.

  5. Flight Investigation of the Effectiveness of an Automatic Aileron Trim Control Device for Personal Airplanes

    Science.gov (United States)

    Phillips, William H; Kuehnel, Helmut A; Whitten, James B

    1957-01-01

    A flight investigation to determine the effectiveness of an automatic aileron trim control device installed in a personal airplane to augment the apparent spiral stability has been conducted. The device utilizes a rate-gyro sensing element in order to switch an on-off type of control that operates the ailerons at a fixed rate through control centering springs. An analytical study using phase-plane and analog-computer methods has been carried out to determine a desirable method of operation for the automatic trim control.

  6. Automatic Generation of Tests from Domain and Multimedia Ontologies

    Science.gov (United States)

    Papasalouros, Andreas; Kotis, Konstantinos; Kanaris, Konstantinos

    2011-01-01

    The aim of this article is to present an approach for generating tests in an automatic way. Although other methods have been already reported in the literature, the proposed approach is based on ontologies, representing both domain and multimedia knowledge. The article also reports on a prototype implementation of this approach, which…

  7. Using Automatic Speech Recognition Technology with Elicited Oral Response Testing

    Science.gov (United States)

    Cox, Troy L.; Davies, Randall S.

    2012-01-01

    This study examined the use of automatic speech recognition (ASR) scored elicited oral response (EOR) tests to assess the speaking ability of English language learners. It also examined the relationship between ASR-scored EOR and other language proficiency measures and the ability of the ASR to rate speakers without bias to gender or native…

  8. 容积法体积管自动检定装置%Volumetric method volume tube automatic calibration device

    Institute of Scientific and Technical Information of China (English)

    周兵

    2014-01-01

    Using standard metal gauge, four-way commutator, PC, PLC as the main hardware, Kingview software development platform, The building Volumetric method volume tube automatic calibration device. According to the verification regulation requirements, To control the flow valve, Device automatically read standard gauge of metal volume value, The automatic temperature and pressure values collected, Automatically calculate the volume tube basic volume, standard error, repeatability, accuracy and repeatability. Realize the visual operation interface, save the test data, print calibration certificate, the notice of verification results, etc.%利用标准金属量器、四通换向器、计算机、PLC 为主要硬件,组态王软件为开发平台,构建容积法体积管自动检定装置。根据检定规程要求,控制流量阀,装置自动读取标准金属量器的容积值、自动采集温度、压力值,自动计算出体积管基本体积、标准误差、重复性、准确度、复现性。实现可视的操作界面、保存检定数据、打印检定证书、检定结果通知书等功能。

  9. The AMIDA automatic content linking device: Just-in-time document retrieval in meetings

    NARCIS (Netherlands)

    Popescu-Belis, A.; Boertjes, E.M.; Kilgour, J.; Poller, P.; Castronovo, S.; Wilson, T.; Jaimes, A.; Carletta, J.

    2008-01-01

    The AMIDA Automatic Content Linking Device (ACLD) is a just-in-time document retrieval system for meeting environments. The ACLD listens to a meeting and displays information about the documents from the group's history that are most relevant to what is being said. Participants can view an outline

  10. The two-probe device for automatic measurement of the reflection coefficient

    Directory of Open Access Journals (Sweden)

    Л.Я. Ільницький

    2004-01-01

    Full Text Available  The two-probe device for automatic measurement of the reflection coefficient in the HF range is proposed and analyzed. The main parts in the instrument control system are the sum-and-difference bridge and the microprocessor.

  11. FATIGUE DEVICE FOR TESTING ANKLE JOINT ENDOPROSTHESES

    Directory of Open Access Journals (Sweden)

    Cristian TOADER-PASTI

    2012-05-01

    Full Text Available The paper proposes a model of a fatigue device for testing dedicated to ankle prostheses. The concept of the testing device relies on two aspects: almost any type of ankle prosthesis can be tested on it and it has to work on INSTRON axial-torsion testing machine. Starting from these requirements, a 3D functional assembly that reproduces the real movement of the ankle joint during gait cycle has been designed. The device is based on a cam-follower mechanism.

  12. Four-terminal electrical testing device

    Science.gov (United States)

    Robinson, Robert L.; Graves, Thomas J.; Hoffman, William C., III

    1987-04-01

    The invention relates to a four-terminal electrical connector device for testing and measuring unknown resistances of initiators used for starting pyrotechnic events aboard the space shuttle. The testing device minimizes contact resistance degradation effects and so improves the reliability of resistance measurements taken with the device. Separate and independent voltage sensing and current supply circuits each include a pair of socket contacts for mating engagement with the pins of the initiator. The unknown resistance that is measured by the device is the resistance of the bridgewire of the initiator which is required to be between 0.95 and 1.15 ohms.

  13. Experimental Applications of Automatic Test Markup Language (ATML)

    Science.gov (United States)

    Lansdowne, Chatwin A.; McCartney, Patrick; Gorringe, Chris

    2012-01-01

    The authors describe challenging use-cases for Automatic Test Markup Language (ATML), and evaluate solutions. The first case uses ATML Test Results to deliver active features to support test procedure development and test flow, and bridging mixed software development environments. The second case examines adding attributes to Systems Modelling Language (SysML) to create a linkage for deriving information from a model to fill in an ATML document set. Both cases are outside the original concept of operations for ATML but are typical when integrating large heterogeneous systems with modular contributions from multiple disciplines.

  14. Automatic switching and guidance system to facilitate unassisted uroflowmetry using commercial electronic devices.

    Science.gov (United States)

    Terai, Akito; Ueda, Nobufumi; Utsunomiya, Noriaki; Kohei, Naoki; Aoyama, Teruyoshi; Inoue, Koji

    2006-08-01

    To enable male patients to undergo uroflowmetry in a private condition without medical supervision, we devised an automatic switching and patient guidance system for the spinning disk uroflowmeter Urodyn 1000, using two commercial electronic devices (an infrared motion sensor tap and a memorizable vacuum fluorescent display). Instead of running the uroflowmeter continuously, which shortens the life of the spinning disk due to mechanical wear, an infrared motion sensor turns on the devices each time a patient enters the room. The patient urinates according to the timely instructions on the visible display and voided urine directly flows into a urinal. The devices are automatically turned off 5 min after the patient leaves the room. With the use of our system, men already acquainted with uroflowmetry could perform self-administered uroflowmetry any time in private. The system was considered useful for improving the quality of patient service.

  15. A versatile magnetic refrigeration test device.

    Science.gov (United States)

    Bahl, C R H; Petersen, T F; Pryds, N; Smith, A

    2008-09-01

    A magnetic refrigeration test device has been built and tested. The device allows variation and control of many important experimental parameters, such as the type of heat transfer fluid, the movement of the heat transfer fluid, the timing of the refrigeration cycle, and the magnitude of the applied magnetic field. An advanced two-dimensional numerical model has previously been implemented in order to help in the optimization of the design of a refrigeration test device. Qualitative agreement between the results from model and the experimental results is demonstrated for each of the four different parameter variations mentioned above.

  16. A versatile magnetic refrigeration test device

    DEFF Research Database (Denmark)

    Bahl, Christian Robert Haffenden; Petersen, Thomas Frank; Pryds, Nini

    2008-01-01

    A magnetic refrigeration test device has been built and tested. The device allows variation and control of many important experimental parameters, such as the type of heat transfer fluid, the movement of the heat transfer fluid, the timing of the refrigeration cycle, and the magnitude...... of the applied magnetic field. An advanced two-dimensional numerical model has previously been implemented in order to help in the optimization of the design of a refrigeration test device. Qualitative agreement between the results from model and the experimental results is demonstrated for each of the four...

  17. The use of a new automatic device for patients' assessment at Triage in Emergency Department

    Directory of Open Access Journals (Sweden)

    Salvatore Di Somma

    2013-06-01

    Full Text Available Objectives: To assess time saving in an Emergency Department arising out of the introduction of automatic devices (Carescape™ V100 to measure vital signs compared to the manual devices. Methods: We performed a prospective, observational study of eligible patients referring to Sant’Andrea Hospital Emergency Department during the entire month of October 2009, randomly assigned into two groups. In the first group of 476 patients vital signs measurements were detected with manual devices, while in the second group of 477 patients with automatic device Carescape™ V100. Results: Data indicated that the comparison of the total time between the two groups gave a significant difference (1993 vs 1518 min, p < 0.001. No differences were found with respect to age, sex and priority codes. Significant differences were also found when comparing the subgroups of the same acuity categories: white codes 4.33 vs 2.27 (min, p < 0.05; green codes 4.28 vs 3.37 (min, p < 0.001; yellow codes 3.92 vs 2.72 (min, p < 0.001. Conclusions: Our data demonstrated a statistical significance between the two groups with a difference of 475 minutes spent in Triage procedures including vital signs measurements. In conclusion time saved by vital signs automatic device could allow ED physicians to make a qualified approach with an earlier diagnosis and a more rapid and effective therapy, possibly improving patients’ outcomes. ABSTRACT of data concerning vital signs quality assessment, because we did not compare the two methods in the same patient and we did not correlate Triage priority evaluation with patients’ outcomes. In the future further studies should be specifically aimed to address this issue. In conclusion time saved by vital signs automatic device could allow ED physicians to make a qualified approach to patient with an earlier diagnosis and a more rapid and effective therapy, possibly improving patients’ outcomes.

  18. [Information safety test of digital medical device].

    Science.gov (United States)

    Liu, Jiong

    2014-07-01

    According to the background of the age of big data, the medical devices are informatized, we analyze the safety and efficiency for the information and data of digital medical devices or medical systems, also discussed some test methods. Lack of a suitable standard system of digital medical devices is a big problem both for domain standard and international standard. GB25000.51 is too ambiguous and free for testing, also not very operational. So this paper suggested some test advices and some prospective method. These test methods are helpful for finding the problem and performing the standards. What's more, these methods are famous in the world and used widely in the 3C region but just start in the medical region, which can promote the development of the medical devices.

  19. Designing of an Automatic Paraffin Controlling Device for a Beam Well

    Institute of Scientific and Technical Information of China (English)

    YAN Jian; LIU Xiao-juan; LI Shu-qin; YANG Shi-hao; ZHANG Ning-sheng

    2008-01-01

    Aiming at the paraffin-deposition problem of a beam well,the automatic paraffin-controlling device is designed by making use of ratchet-pallet mechanism,cam echanism and modern designing method.The device has four main functions:paraffin-controlling,paraffin removal,centralizing the pumping rod,and improving the safety of well tubing.This device integrates the advantages of the paraffin control,such as strong magnetic paraffin controlling and mechanical paraffin-cntting.Theoretical analysis shows that this device has fine working reliability.It turns out to be a new device which can solve the paraffin-deposition problem of a beam well economieally and efficiently.

  20. Automatic memory management policies for low power, memory limited, and delay intolerant devices

    Science.gov (United States)

    Jahid, Md. Abu

    Mobile devices such as smartphones and tablets are energy and memory limited, and implement graphical user interfaces that are intolerant of computational delays. Mobile device platforms supporting apps implemented in languages that require automatic memory management, such as the Dalvik (Java) virtual machine within Google's Android, have become dominant. It is essential that automatic memory management avoid causing unacceptable interface delays while responsibly managing energy and memory resource usage. Dalvik's automatic memory management policies for heap growth and garbage collection scheduling utilize heuristics tuned to minimize memory footprint. These policies result in only marginally acceptable response times and garbage collection signicantly contributes to apps' CPU time and therefore energy consumption. The primary contributions of this research include a characterization of Dalvik's "baseline" automatic memory management policy, the development of a new "adaptive" policy, and an investigation of the performance of this policy. The investigation indicates that this adaptive policy consumes less CPU time and improves interactive performance at the cost of increasing memory footprint size by an acceptable amount.

  1. 食品链式自动分拣装置%Food Chain Automatic Sorting Device

    Institute of Scientific and Technical Information of China (English)

    姜鑫

    2016-01-01

    该文设计的种食品自动分拣装置集成了PLC、气动控制、传感与检测、变频控制等多种技术,能够自动完成对铝箔、纸质和塑料包装的三种食品进行自动分拣,整机机械结构采用链式传动装置,材料采用304食品级不锈钢,不仅卫生、方便,还能够高效的完成自动分拣过程、提高劳动生产率,具有一定推广价值.%In this paper, the design of food automatic sorting device integrated many technologies PLC, sensing and detection, frequency conversion control, can automatically complete the aluminum foil, paper and plastic packaging of food on the automatic sorting, the whole mechanical structure of the chain transmission device, food grade 304 stainless steel is adopted as material, not only has the advantages of sanitation, convenience, but also can efficiently complete automatic sorting process, improve labor productivity and has a certain populariza-tion value.

  2. Automatic illumination compensation device based on a photoelectrochemical biofuel cell driven by visible light

    Science.gov (United States)

    Yu, You; Han, Yanchao; Xu, Miao; Zhang, Lingling; Dong, Shaojun

    2016-04-01

    Inverted illumination compensation is important in energy-saving projects, artificial photosynthesis and some forms of agriculture, such as hydroponics. However, only a few illumination adjustments based on self-powered biodetectors that quantitatively detect the intensity of visible light have been reported. We constructed an automatic illumination compensation device based on a photoelectrochemical biofuel cell (PBFC) driven by visible light. The PBFC consisted of a glucose dehydrogenase modified bioanode and a p-type semiconductor cuprous oxide photocathode. The PBFC had a high power output of 161.4 μW cm-2 and an open circuit potential that responded rapidly to visible light. It adjusted the amount of illumination inversely irrespective of how the external illumination was changed. This rational design of utilizing PBFCs provides new insights into automatic light adjustable devices and may be of benefit to intelligent applications.Inverted illumination compensation is important in energy-saving projects, artificial photosynthesis and some forms of agriculture, such as hydroponics. However, only a few illumination adjustments based on self-powered biodetectors that quantitatively detect the intensity of visible light have been reported. We constructed an automatic illumination compensation device based on a photoelectrochemical biofuel cell (PBFC) driven by visible light. The PBFC consisted of a glucose dehydrogenase modified bioanode and a p-type semiconductor cuprous oxide photocathode. The PBFC had a high power output of 161.4 μW cm-2 and an open circuit potential that responded rapidly to visible light. It adjusted the amount of illumination inversely irrespective of how the external illumination was changed. This rational design of utilizing PBFCs provides new insights into automatic light adjustable devices and may be of benefit to intelligent applications. Electronic supplementary information (ESI) available. See DOI: 10.1039/c6nr00759g

  3. The application of charge-coupled device processors in automatic-control systems

    Science.gov (United States)

    Mcvey, E. S.; Parrish, E. A., Jr.

    1977-01-01

    The application of charge-coupled device (CCD) processors to automatic-control systems is suggested. CCD processors are a new form of semiconductor component with the unique ability to process sampled signals on an analog basis. Specific implementations of controllers are suggested for linear time-invariant, time-varying, and nonlinear systems. Typical processing time should be only a few microseconds. This form of technology may become competitive with microprocessors and minicomputers in addition to supplementing them.

  4. The application of charge-coupled device processors in automatic-control systems

    Science.gov (United States)

    Mcvey, E. S.; Parrish, E. A., Jr.

    1977-01-01

    The application of charge-coupled device (CCD) processors to automatic-control systems is suggested. CCD processors are a new form of semiconductor component with the unique ability to process sampled signals on an analog basis. Specific implementations of controllers are suggested for linear time-invariant, time-varying, and nonlinear systems. Typical processing time should be only a few microseconds. This form of technology may become competitive with microprocessors and minicomputers in addition to supplementing them.

  5. Particle image velocimetry for an automatic cooling device using temperature-sensitive magnetic fluid

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    An automatic cooling device has been developed by using a temperature-sensitive magnetic fluid as the coolant. A particle image velocimetry (PIV) system was used to measure the flow velocity of the fluid inside the loop. The efficiency of the device under varying conditions such as the heat load and the power of cooling were ex- perimentally investigated. The effect of cooperation between external magnetic field and thermal field on the performance of the device was studied. As expected, a continuous flow induced by the thermal and magnetic field was observed in the loop, where heat was transferred by the circulating magnetic fluid. The synergic effect between the magnetic field and the temperature gradient has impact on the performance of the device.

  6. Particle image velocimetry for an automatic cooling device using temperature-sensitive magnetic fluid

    Institute of Scientific and Technical Information of China (English)

    LIAN WenLei; LI Qiang; XUAN YiMin

    2008-01-01

    An automatic cooling device has been developed by using a temperature-sensitive magnetic fluid as the coolant. A particle image velocimetry (PIV) system was used to measure the flow velocity of the fluid inside the loop. The efficiency of the device under varying conditions such as the heat load and the power of cooling were ex-perimentally investigated. The effect of cooperation between external magnetic field and thermal field on the performance of the device was studied. As expected, a continuous flow induced by the thermal and magnetic field was observed in the loop, where heat was transferred by the circulating magnetic fluid. The synergic effect between the magnetic field and the temperature gradient has impact on the performance of the device.

  7. Single Event Effect Testing of the Analog Devices ADV212

    Science.gov (United States)

    Wilcox, Ted; Campola, Michael; Kadari, Madhu; Nadendla, Seshagiri R.

    2017-01-01

    The Analog Devices ADV212 was initially tested for single event effects (SEE) at the Texas AM University Cyclotron Facility (TAMU) in July of 2013. Testing revealed a sensitivity to device hang-ups classified as single event functional interrupts (SEFI), soft data errors classified as single event upsets (SEU), and, of particular concern, single event latch-ups (SEL). All error types occurred so frequently as to make accurate measurements of the exposure time, and thus total particle fluence, challenging. To mitigate some of the risk posed by single event latch-ups, circuitry was added to the electrical design to detect a high current event and automatically recycle power and reboot the device. An additional heavy-ion test was scheduled to validate the operation of the recovery circuitry and the continuing functionality of the ADV212 after a substantial number of latch-up events. As a secondary goal, more precise data would be gathered by an improved test method, described in this test report.

  8. Automatic Rayleigh scattering mapping system for optical quality evaluation of test masses for gravity wave detectors

    Science.gov (United States)

    Yan, Zewu; Zhao, Chunnong; Ju, Li; Gras, Slawomir; Baringa, Pablo; Blair, David G.

    2005-01-01

    This article describes an automatic Rayleigh scattering mapping system (ARSMS), which enables quantitative high-resolution three-dimensional mapping of inhomogeneities in optical materials. The ARSMS allows large high-grade test mass samples for gravitational wave detectors to be evaluated to ensure that an adequate low level of scattering is achieved. The ARSMS combines proprietary camera software with data analysis software and control software to achieve fully automatic operation with graphical user interfaces. This article presents the instrument concept and examples of the output. Device mapping in all degrees of freedom is shown to be better than 0.5mm, with scattering sensitivity better than 0.5ppm/cm. This system is able to scan and map the Rayleigh scattering of large samples in both of cylindrical and rectangular samples using cylindrical and Cartesian coordinates.

  9. Development of an automatic measuring device for total sugar content in chlortetracycline fermenter based on STM32

    Science.gov (United States)

    Liu, Ruochen; Chen, Xiangguang; Yao, Minpu; Huang, Suyi; Ma, Deshou; Zhou, Biao

    2017-01-01

    Because fermented liquid in chlortetracycline fermenter has high viscosity and complex composition, conventional instruments can't directly measure its total sugar content of fermented liquid. At present, offline artificial sampling measurement is usually the way to measuring total sugar content in chlortetracycline Fermenter. it will take too much time and manpower to finish the measurement., and the results will bring the lag of control process. To realize automatic measurement of total sugar content in chlortetracycline fermenter, we developed an automatic measuring device for total sugar content based on STM32 microcomputer. It can not only realize the function of automatic sampling, filtering, measuring of fermented liquid and automatic washing of the device, but also can make the measuring results display in the field and finish data communication. The experiment results show that the automatic measuring device of total sugar content in chlortetracycline fermenter can meet the demand of practical application.

  10. Electronic Voltage and Current Transformers Testing Device

    Directory of Open Access Journals (Sweden)

    Yong Xiao

    2012-01-01

    Full Text Available A method for testing electronic instrument transformers is described, including electronic voltage and current transformers (EVTs, ECTs with both analog and digital outputs. A testing device prototype is developed. It is based on digital signal processing of the signals that are measured at the secondary outputs of the tested transformer and the reference transformer when the same excitation signal is fed to their primaries. The test that estimates the performance of the prototype has been carried out at the National Centre for High Voltage Measurement and the prototype is approved for testing transformers with precision class up to 0.2 at the industrial frequency (50 Hz or 60 Hz. The device is suitable for on-site testing due to its high accuracy, simple structure and low-cost hardware.

  11. Photostress Testing Device for Diagnosing Retinal Disease

    OpenAIRE

    Elizabeth Swan; Jim Schwiegerling; Gholam Peyman; Eniko Enikov

    2014-01-01

    Retinal diseases such as Age-Related Macular Degeneration (ARMD) affect nearly one in three elderly patients. ARMD damages the central vision photoreceptors in the fovea. The Photostress Test is a simple technique for testing for the early effects of ARMD. Here, the illumination sources in a novel self-administered Photostress Testing device were modeled for safety and distribution in illumination software. After satisfying the design constraints in the model, a prototype of the illumination ...

  12. A new asymmetric directional microphone algorithm with automatic mode-switching ability for binaural hearing support devices.

    Science.gov (United States)

    Kim, Jinryoul; Nam, Kyoung Won; Yook, Sunhyun; Jang, Dong Pyo; Kim, In Young; Hong, Sung Hwa

    2015-06-01

    For hearing support devices, it is important to minimize the negative effect of ambient noises for speech recognition but also, at the same time, supply natural ambient sounds to the hearing-impaired person. However, conventional fixed bilateral asymmetric directional microphone (DM) algorithms cannot perform in such a way when the DM-mode device and a dominant noise (DN) source are placed on the same lateral hemisphere. In this study, a new binaural asymmetric DM algorithm that can overcome the defects of conventional algorithms is proposed. The proposed algorithm can estimate the position of a specific DN in the 90°-270° range and switch directional- and omnidirectional-mode devices automatically if the DM-mode device and the DN are placed in opposite lateral hemispheres. Computer simulation and KEMAR mannequin recording tests demonstrated that the performance of the conventional algorithm deteriorated when the DM-mode device and the DN were placed in the opposite hemisphere; in contrast, the performance of the proposed algorithm was consistently maintained regardless of directional variations in the DN. Based on these experimental results, the proposed algorithm may be able to improve speech quality and intelligibility for hearing-impaired persons who have similar degrees of hearing impairment in both ears.

  13. Field testing driver night vision devices

    NARCIS (Netherlands)

    Kooi, F.L.; Kolletzki, D.

    2007-01-01

    This paper summarizes the available methodologies to field test driver night vision devices ranging from vehicle mounted camera’s to head-mounted NVG’s. As in flight trials, a formidable challenge is to collect meaningful performance measures. Night vision systems for land and air systems show many

  14. Ultrasonic fatigue testing device under biaxial bending

    Directory of Open Access Journals (Sweden)

    C. Brugger

    2016-07-01

    Full Text Available A new fatigue testing device has been developed to test specimens under biaxial loading at 20 kHz. A flat smooth specimen with a disc geometry is placed on a torus frame and cyclically loaded at the center of its upper face. Disc bending generates a biaxial proportional stress state at the center of the lower face. Any positive loading ratio can be applied. A cast aluminum alloy (used to produce cylinder heads has been tested under biaxial bending using this device in order to determine its fatigue strength at 109 cycles under high hydrostatic pressure. Self-heating is moderate but macroscopic fatigue cracks after testing are very long. First results in VHCF regime are consistent with literature results obtained under similar stress state but in HCF regime and at 20 Hz.

  15. An automatic device for the quality control of large-scale crystal's production

    CERN Document Server

    Baccaro, S; Castellani, M; Cecilia, A; Dafinei, I; Diemoz, M; Guerra, S; Longo, E; Montecchi, M; Organtini, G; Pellegrini, F

    2001-01-01

    In 1999, the construction of the electromagnetic calorimeter of the Compact Muon Solenoid (CMS) experiment started. Half of the barrel calorimeter made of 61200 lead tungstate (PWO) crystals will be assembled and tested in the Regional Centre of INFN-ENEA in Rome, Italy. Before assembling, all 30600 PWO crystals will be qualified for scintillation and radiation hardness characteristics by a specially built Automatic Crystal Control System. The measuring techniques for crystal qualification and performances of the automatic system will be discussed in this work. (11 refs).

  16. Photostress Testing Device for Diagnosing Retinal Disease

    Directory of Open Access Journals (Sweden)

    Elizabeth Swan

    2014-08-01

    Full Text Available Retinal diseases such as Age-Related Macular Degeneration (ARMD affect nearly one in three elderly patients. ARMD damages the central vision photoreceptors in the fovea. The Photostress Test is a simple technique for testing for the early effects of ARMD. Here, the illumination sources in a novel self-administered Photostress Testing device were modeled for safety and distribution in illumination software. After satisfying the design constraints in the model, a prototype of the illumination system was fabricated and tested to confirm the modeling results. The resultant prototype can be used to aid in the diagnosis of retinal disease and is well within retinal safety levels.

  17. Electrostatic discharge testing of electroexplosive devices

    Energy Technology Data Exchange (ETDEWEB)

    Hingorani, S.L.

    1990-01-01

    Electrostatic discharge (ESD) testing of electroexplosive devices has previously been regarded as single pulse, go/no-go testing, the emphasis being on the safety of the devices when exposed to human handling. For some components it has been found to be a destructive test; for others the test is performed 100% in production product-acceptance testing and is considered a nondestructive and nondegrading test if the component does not fire. Recent studies performed by R. J. Fisher at Sandia have resulted in a new model of the worst case human body electrostatic discharge that is more accurate than the model that is currently in use for testing electroexplosive components. In addition, recent requirements for no degradation or loss of reliability after multiple exposures (up to 100) have changed the go/no-go nature of the test. Several components have been tested to the new ESD model; results regarding both safety and reliability will be presented and discussed. 9 refs., 7 figs., 2 tabs.

  18. Framework for automatic information extraction from research papers on nanocrystal devices

    Directory of Open Access Journals (Sweden)

    Thaer M. Dieb

    2015-09-01

    Full Text Available To support nanocrystal device development, we have been working on a computational framework to utilize information in research papers on nanocrystal devices. We developed an annotated corpus called “ NaDev” (Nanocrystal Device Development for this purpose. We also proposed an automatic information extraction system called “NaDevEx” (Nanocrystal Device Automatic Information Extraction Framework. NaDevEx aims at extracting information from research papers on nanocrystal devices using the NaDev corpus and machine-learning techniques. However, the characteristics of NaDevEx were not examined in detail. In this paper, we conduct system evaluation experiments for NaDevEx using the NaDev corpus. We discuss three main issues: system performance, compared with human annotators; the effect of paper type (synthesis or characterization on system performance; and the effects of domain knowledge features (e.g., a chemical named entity recognition system and list of names of physical quantities on system performance. We found that overall system performance was 89% in precision and 69% in recall. If we consider identification of terms that intersect with correct terms for the same information category as the correct identification, i.e., loose agreement (in many cases, we can find that appropriate head nouns such as temperature or pressure loosely match between two terms, the overall performance is 95% in precision and 74% in recall. The system performance is almost comparable with results of human annotators for information categories with rich domain knowledge information (source material. However, for other information categories, given the relatively large number of terms that exist only in one paper, recall of individual information categories is not high (39–73%; however, precision is better (75–97%. The average performance for synthesis papers is better than that for characterization papers because of the lack of training examples for

  19. Framework for automatic information extraction from research papers on nanocrystal devices.

    Science.gov (United States)

    Dieb, Thaer M; Yoshioka, Masaharu; Hara, Shinjiro; Newton, Marcus C

    2015-01-01

    To support nanocrystal device development, we have been working on a computational framework to utilize information in research papers on nanocrystal devices. We developed an annotated corpus called " NaDev" (Nanocrystal Device Development) for this purpose. We also proposed an automatic information extraction system called "NaDevEx" (Nanocrystal Device Automatic Information Extraction Framework). NaDevEx aims at extracting information from research papers on nanocrystal devices using the NaDev corpus and machine-learning techniques. However, the characteristics of NaDevEx were not examined in detail. In this paper, we conduct system evaluation experiments for NaDevEx using the NaDev corpus. We discuss three main issues: system performance, compared with human annotators; the effect of paper type (synthesis or characterization) on system performance; and the effects of domain knowledge features (e.g., a chemical named entity recognition system and list of names of physical quantities) on system performance. We found that overall system performance was 89% in precision and 69% in recall. If we consider identification of terms that intersect with correct terms for the same information category as the correct identification, i.e., loose agreement (in many cases, we can find that appropriate head nouns such as temperature or pressure loosely match between two terms), the overall performance is 95% in precision and 74% in recall. The system performance is almost comparable with results of human annotators for information categories with rich domain knowledge information (source material). However, for other information categories, given the relatively large number of terms that exist only in one paper, recall of individual information categories is not high (39-73%); however, precision is better (75-97%). The average performance for synthesis papers is better than that for characterization papers because of the lack of training examples for characterization papers

  20. Methods for testing automatic mode switching in patients implanted with DDD(R) pacemakers.

    Science.gov (United States)

    Lau, Chu-Pak; Mascia, Franco; Corbucci, Giorgio; Padeletti, Luigi

    2004-01-01

    The assessment of automatic mode switching (AMS) algorithms is impossible in vivo, due to a low chance of seeing the patient at the onset of a spontaneous episode of atrial fibrillation (AF). As the induction of AF to test AMS has clinical concerns, three alternative and non-invasive techniques may be proposed for this purpose: myopotentials, chest wall stimulation, and an external supraventricular arrhythmia simulator. The first method is simple and does not require additional equipment, even though in some patients adequate signals cannot be generated with a soft effort such as handgrip or hand compression. The main advantage of the chest wall stimulation method is the possibility that it be performed in every implanting center, since it is based on the use of standard devices for cardiac stimulation. The method based on the external supraventricular arrhythmia simulator allows the most detailed of the ECG traces, but it needs a dedicated electronic device.

  1. Automatic WSDL-guided Test Case Generation for PropEr Testing of Web Services

    Directory of Open Access Journals (Sweden)

    Konstantinos Sagonas

    2012-10-01

    Full Text Available With web services already being key ingredients of modern web systems, automatic and easy-to-use but at the same time powerful and expressive testing frameworks for web services are increasingly important. Our work aims at fully automatic testing of web services: ideally the user only specifies properties that the web service is expected to satisfy, in the form of input-output relations, and the system handles all the rest. In this paper we present in detail the component which lies at the heart of this system: how the WSDL specification of a web service is used to automatically create test case generators that can be fed to PropEr, a property-based testing tool, to create structurally valid random test cases for its operations and check its responses. Although the process is fully automatic, our tool optionally allows the user to easily modify its output to either add semantic information to the generators or write properties that test for more involved functionality of the web services.

  2. A Novel Automatic Rapid Diagnostic Test Reader Platform.

    Science.gov (United States)

    Ozkan, Haydar; Kayhan, Osman Semih

    2016-01-01

    A novel automatic Rapid Diagnostic Test (RDT) reader platform is designed to analyze and diagnose target disease by using existing consumer cameras of a laptop-computer or a tablet. The RDT reader is useable with numerous lateral immunochromatographic assays and similar biomedical tests. The system has two different components, which are 3D-printed, low-cost, tiny, and compact stand and a decision program named RDT-AutoReader 2.0. The program takes the image of RDT, crops the region of interest (ROI), and extracts the features from the control end test lines to classify the results as invalid, positive, or negative. All related patient's personal information, image of ROI, and the e-report are digitally saved and transferred to the related clinician. Condition of the patient and the progress of the disease can be monitored by using the saved data. The reader platform has been tested by taking image from used cassette RDTs of rotavirus (RtV)/adenovirus (AdV) and lateral flow strip RDTs of Helicobacter pylori (H. pylori) before discarding them. The created RDT reader can also supply real-time statistics of various illnesses by using databases and Internet. This can help to inhibit propagation of contagious diseases and to increase readiness against epidemic diseases worldwide.

  3. Redundant drive current imbalance problem of the Automatic Radiator Inspection Device (ARID)

    Science.gov (United States)

    Latino, Carl D.

    1992-09-01

    The Automatic Radiator Inspection Device (ARID) is a 4 Degree of Freedom (DOF) robot with redundant drive motors at each joint. The device is intended to automate the labor intensive task of space shuttle radiator inspection. For safety and redundancy, each joint is driven by two independent motor systems. Motors driving the same joint, however, draw vastly different currents. The concern was that the robot joints could be subjected to undue stress. It was the objective of this summer's project to determine the cause of this current imbalance. In addition it was to determine, in a quantitative manner, what was the cause, how serious the problem was in terms of damage or undue wear to the robot and find solutions if possible. It was concluded that most problems could be resolved with a better motor control design. This document discusses problems encountered and possible solutions.

  4. UFC advisor: An AI-based system for the automatic test environment

    Science.gov (United States)

    Lincoln, David T.; Fink, Pamela K.

    1990-01-01

    The Air Logistics Command within the Air Force is responsible for maintaining a wide variety of aircraft fleets and weapon systems. To maintain these fleets and systems requires specialized test equipment that provides data concerning the behavior of a particular device. The test equipment is used to 'poke and prod' the device to determine its functionality. The data represent voltages, pressures, torques, temperatures, etc. and are called testpoints. These testpoints can be defined numerically as being in or out of limits/tolerance. Some test equipment is termed 'automatic' because it is computer-controlled. Due to the fact that effective maintenance in the test arena requires a significant amount of expertise, it is an ideal area for the application of knowledge-based system technology. Such a system would take testpoint data, identify values out-of-limits, and determine potential underlying problems based on what is out-of-limits and how far. This paper discusses the application of this technology to a device called the Unified Fuel Control (UFC) which is maintained in this manner.

  5. Testing Framework for Mobile Device Forensics Tools

    Directory of Open Access Journals (Sweden)

    Maxwell Anobah

    2014-09-01

    Full Text Available The proliferation of mobile communication and computing devices, in particular smart mobile phones, is almost paralleled with the increasing number of mobile device forensics tools in the market. Each mobile forensics tool vendor, on one hand claims to have a tool that is best in terms of performance, while on the other hand each tool vendor seems to be using different standards for testing their tools and thereby defining what support means differently. To overcome this problem, a testing framework based on a series of tests ranging from basic forensics tasks such as file system reconstruction up to more complex ones countering antiforensic techniques is proposed. The framework, which is an extension of an existing effort done in 2010, prescribes a method to clearly circumscribe the term support into precise levels. It also gives an idea of the standard to be developed and accepted by the forensic community that will make it easier for forensics investigators to quickly select the most appropriate tool for a particular mobile device.

  6. Inter-device reliability of an automatic-scoring actigraph for measuring sleep in healthy adults

    Directory of Open Access Journals (Sweden)

    Matthew Driller

    2016-07-01

    Full Text Available Actigraphy has become a common method of measuring sleep due to its non-invasive, cost-effective nature. An actigraph (Readiband™ that utilizes automatic scoring algorithms has been used in the research, but is yet to be evaluated for its inter-device reliability. A total of 77 nights of sleep data from 11 healthy adult participants was collected while participants were concomitantly wearing two Readiband™ actigraphs attached together (ACT1 and ACT2. Sleep indices including total sleep time (TST, sleep latency (SL, sleep efficiency (SE%, wake after sleep onset (WASO, total time in bed (TTB, wake episodes per night (WE, sleep onset variance (SOV and wake variance (WV were assessed between the two devices using mean differences, 95% levels of agreement, intraclass correlation coefficients (ICC, typical error of measurement (TEM and coefficient of variation (CV% analysis. There were no significant differences between devices for any of the measured sleep variables (p>0.05. TST, SE, SL, TTB, SOV and WV all resulted in very high ICC's (>0.90, with WASO and WE resulting in high ICC's between devices (0.85 and 0.80, respectively. Mean differences of −2.1 and 0.2 min for TST and SL were associated with a low TEM between devices (9.5 and 3.8 min, respectively. SE resulted in a 0.3% mean difference between devices. The Readiband™ is a reliable tool for researchers using multiple devices of this brand in sleep studies to assess basic measures of sleep quality and quantity in healthy adult populations.

  7. Performance of an automatically deployable ROPS on ASAE tests.

    Science.gov (United States)

    Powers, J R; Harris, J R; Etherton, J R; Snyder, K A; Ronaghi, M; Newbraugh, B H

    2001-02-01

    In the U.S., approximately 132 agricultural tractor overturn fatalities occur per year. The use of rollover protective structures (ROPS), along with seat belts, is the best-known method for preventing these fatalities. However, one impediment to ROPS use is low-clearance situations, such as orchards and animal confinement buildings. To address the need for ROPS that are easily adapted to low-clearance situations, the Division of Safety Research, National Institute for Occupational Safety and Health, developed a prototype automatically deploying, telescoping ROPS (AutoROPS). The NIOSH AutoROPS consists of two subsystems. The first is a retractable ROPS that is normally latched in its lowered position for day-to-day use. The second subsystem is a sensor that monitors the operating angle of the tractor. If an overturn condition is detected by the sensor, the retracted ROPS will deploy and lock in the full upright position before ground contact. Static load testing and field upset tests of the NIOSH AutoROPS have been conducted in accordance with SAE standard J2194. Additionally, timed trials of the AutoROPS deployment mechanism were completed. The results of these tests show that the NIOSH AutoROPS has significant potential to overcome the limitations of current ROPS designs for use in low clearance as well as unrestricted clearance operations.

  8. Learning Techniques for Automatic Test Pattern Generation using Boolean Satisfiability

    Directory of Open Access Journals (Sweden)

    Liu Xin

    2013-07-01

    Full Text Available Automatic Test Pattern Generation (ATPG is one of the core problems in testing of digital circuits. ATPG algorithms based on Boolean Satisfiability (SAT turned out to be very powerful, due to great advances in the performance of satisfiability solvers for propositional logic in the last two decades. SAT-based ATPG clearly outperforms classical approaches especially for hard-to-detect faults. But its inaccessibility of structural information and don’t care, there exists the over-specification problem of input patterns. In this paper we present techniques to delve into an additional layer to make use of structural properties of the circuit and value justification relations to a generic SAT algorithm. It joins binary decision graphs (BDD and SAT techniques to improve the efficiency of ATPG. It makes a study of inexpensive reconvergent fanout analysis of circuit to gather information on the local signal correlation by using BDD learning, then uses the above learned information to restrict and focus the overall search space of SAT-based ATPG. The learning technique is effective and lightweight. Experimental results show the effectiveness of the approach.

  9. Type Testing of Model 7200 Automatic TLD Reader.

    Science.gov (United States)

    Malek Mohammadi, M; Hosseini Pooya, S M

    2017-04-20

    The type testing of measuring devices is one of the most important parts of a quality management system in a personal dosimetry services program. In this study, based upon the International Electrotechnical Commission (IEC) 62387 criteria, a reader-testing program was performed for a home-made personal thermoluminescent dosimetry (TLD) reader. The stability of the reader, the effects of light exposure, temperature and fluctuations of primary power supply on TLD read-outs as the main parameters were investigated in this program. Moreover, this study assesses some important criteria of dosimetry system including the non-linearity of response, reusability, after effect and overload that may include significant contribution in the performance of a reader. The results showed that the TLD reader met all requirements of the IEC for the reader tests by a large margin. © The Author 2016. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  10. 46 CFR 61.30-20 - Automatic control and safety tests.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Automatic control and safety tests. 61.30-20 Section 61.30-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING PERIODIC TESTS AND INSPECTIONS Tests and Inspections of Fired Thermal Fluid Heaters § 61.30-20 Automatic...

  11. An Automatic Testing System of Scheduling Strategies in Real-Time UNIX

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    This paper proposes a formal model of the automatic testing system for scheduling strategies in real-time UNIX and describes the algorithm of the key part of the system. The model of the system is an important technology of the automatization of software development. According to the model presented in the paper, many different kinds of automatic testing systems can be designed and developed easily. At the end of the paper, the prototype proves the feasibility of the model and design.

  12. AN AUTOMATIC TEST ENVIRONMENT FOR MICROELECTRONICS EDUCATION AND RESEARCH

    Directory of Open Access Journals (Sweden)

    Federico Sandoval-Ibarra

    2008-04-01

    Full Text Available An automatic test environment (ATE based on a PSoC has been developed to perform electricalcharacterization of integrated circuits (ICs. The ICs are designed for academic and research purposesas part of the Electronic Design graduate program at CINVESTAV-Guadalajara Unit; these ICs aremanufactured in standard N-well, 5-V, 1.5μm/0.5μm CMOS technologies. The ATE offers programmablecapabilities to develop master-slave architectures, memory for data storage, functions generator tostimulate circuits and systems, current/voltage sources for several purposes, current-voltagemeasurements, and ports to download experimental data to a PC. To date, several ICs have been testedwith the help of the ATE. In this paper, however, examples based on MOS Transistors only arepresented in order to describe the ATE performance and also to show how experimental data of thedevices under characterization were validated through SPICE simulations, experimental data given bymanufacturers, and using commercial equipment as well.

  13. Veal calves’ clinical/health status in large groups fed with automatic feeding devices

    Directory of Open Access Journals (Sweden)

    Giulio Cozzi

    2010-01-01

    Full Text Available Aim of the current study was to evaluate the clinical/health status of veal calves in 3 farms that adopt large group housing and automatic feeding stations in Italy. Visits were scheduled in three phases of the rearing cycle (early, middle, and end. Results showed a high incidence of coughing, skin infection and bloated rumen particularly in the middle phase while cross-sucking signs were present at the early stage when calves’ nibbling proclivity is still high. Throughout the rearing cycle, the frequency of bursitis increased reaching 53% of calves at the end. The percentage of calves with a poorer body condition than the mid-range of the batch raised gradually as well, likely due to the non-proportioned teat/calves ratio that increases competition for feed and reduces milk intake of the low ranking animals. The remarked growth differences among pen-mates and the mortality rate close to 7% showed by the use of automatic feeding devices for milk delivery seem not compensating the lower labour demand, therefore its sustainability at the present status is doubtful both for the veal calves’ welfare and the farm incomes.

  14. Developing an intelligent control system of automatic window motor with diverse wireless sensor network devices

    Indian Academy of Sciences (India)

    Yao-Chiang Kan; Hsueh-Chun Lin; Wen-Pei Sung

    2014-08-01

    This invention system involves hardware, firmware and software to develop an intelligent control system of automatic window motor with diverse wireless sensor network (WSN) devices for health and environmental monitoring. The parts of this invention are improved by implementing the WSN mote into environmental sensors that may detect temperature, humility, toxic gas, smog or aerosol, etc. With embedded system design, these sensors are capable of delivering WSN signal packets based on ZigBee protocol that follows the IEEE 802.14.4 standards. The primary hardware of the system is the window motor with circuit design by integrating micro control unit (MCU), radio frequency (RF) and WSN antenna to receive command. The firmware developed under embedded system can bridge hardware and software to control the window at the specified position. At the back end, the control system software can manage diverse sensor data and provide the interface for remote monitoring.

  15. A novel automatic method for monitoring Tourette motor tics through a wearable device.

    Science.gov (United States)

    Bernabei, Michel; Preatoni, Ezio; Mendez, Martin; Piccini, Luca; Porta, Mauro; Andreoni, Giuseppe

    2010-09-15

    The aim of this study was to propose a novel automatic method for quantifying motor-tics caused by the Tourette Syndrome (TS). In this preliminary report, the feasibility of the monitoring process was tested over a series of standard clinical trials in a population of 12 subjects affected by TS. A wearable instrument with an embedded three-axial accelerometer was used to detect and classify motor tics during standing and walking activities. An algorithm was devised to analyze acceleration data by: eliminating noise; detecting peaks connected to pathological events; and classifying intensity and frequency of motor tics into quantitative scores. These indexes were compared with the video-based ones provided by expert clinicians, which were taken as the gold-standard. Sensitivity, specificity, and accuracy of tic detection were estimated, and an agreement analysis was performed through the least square regression and the Bland-Altman test. The tic recognition algorithm showed sensitivity = 80.8% ± 8.5% (mean ± SD), specificity = 75.8% ± 17.3%, and accuracy = 80.5% ± 12.2%. The agreement study showed that automatic detection tended to overestimate the number of tics occurred. Although, it appeared this may be a systematic error due to the different recognition principles of the wearable and video-based systems. Furthermore, there was substantial concurrency with the gold-standard in estimating the severity indexes. The proposed methodology gave promising performances in terms of automatic motor-tics detection and classification in a standard clinical context. The system may provide physicians with a quantitative aid for TS assessment. Further developments will focus on the extension of its application to everyday long-term monitoring out of clinical environments.

  16. A test of Automatic Blowing snow Station (ABS) in the French Alps

    Science.gov (United States)

    Ito, Yoichi; Naaim-Bouvet, Florence; Nishimura, Kouichi; Bellot, Hervé; Fontaine, Firmin

    2015-04-01

    Blowing snow is a significant factor to estimate snow distribution in alpine, Arctic and Antarctic regions. The Snow Particle Counter (SPC) is well used for mass flux measurement of the blowing snow, however, the SPC deployment is not always possible for automatic observation under harsh conditions. Recently Automatic Blowing snow Station (ABS), which is a simpler device than the SPC, have been developed in Japan. We installed the ABS system with the SPCs at the Lac Blanc Pass in the French Alps (2700 m a.s.l.) to examine the relationship between the ABS output and snow particle mass flux. The ABS worked well, without problems, for the entire 4-month period in the winter 2014. The ABS output was converted to mass flux using wind-dependent power function which obtained from calibration procedure in a cold wind-tunnel. The mass flux obtained from the ABS showed a good agreement with the SPC, particularly around the peak of blowing snow event. Based on tests under controlled (cold wind-tunnel) and field conditions, we conclude that the ABS is suitable for practical use.

  17. Test device for measuring permeability of a barrier material

    Science.gov (United States)

    Reese, Matthew; Dameron, Arrelaine; Kempe, Michael

    2014-03-04

    A test device for measuring permeability of a barrier material. An exemplary device comprises a test card having a thin-film conductor-pattern formed thereon and an edge seal which seals the test card to the barrier material. Another exemplary embodiment is an electrical calcium test device comprising: a test card an impermeable spacer, an edge seal which seals the test card to the spacer and an edge seal which seals the spacer to the barrier material.

  18. A closed-loop automatic control system for high-intensity acoustic test systems.

    Science.gov (United States)

    Slusser, R. A.

    1973-01-01

    Sound at sound pressure levels in the range from 130 to 160 dB is used in the investigation. Random noise is passed through a series of parallel filters, generally 1/3-octave wide. A basic automatic system is investigated because of preadjustment inaccuracies and high costs found in a study of a typical manually controlled acoustic testing system. The unit described has been successfully used in automatic acoustic tests in connection with the spacecraft tests for the Mariner 1971 program.

  19. Solar Automatic Tracking Device Research and Development%太阳光自动跟踪装置的研发

    Institute of Scientific and Technical Information of China (English)

    王锋; 张忠远

    2011-01-01

    The Mitsubishi FX2N-48 programmable controller is taken as the control core, and vinylon touch screen as an interface, the all-weather solar automatic tracking device is designed. The sunlight automatic tracking device design scheme, structure characteristics, working process and energy saving application prospect are introduced, and the sunlight coordinate model, and the mechanical drive mechanism are established. The test control mode, the system hardware of the photoelectric detection circuit, an PLC control circuit, keyboard and display circuit design method are expounded. The software part adopts the modular design, and the data processing and control process design are given. Experimental results show that, the system uses the unique design of sun tracking device, tracking controller and a transmission actuator. In sunny weather, all-weather solar panels to perpendicular to the sun, gready improve the solar panels generating capacity.%设计制作一种以三菱FX2N-48可编程控制器作为控制核心,以维纶触摸屏作为界面控制的全天候太阳光自动跟踪装置.介绍了太阳光自动跟踪装置的总体设计方案、结构特点、工作过程及节能应用前景,建立了太阳光坐标模型,设计了系统的机械传动机构;阐述了控制系统的有关检测控制方式,给出了系统硬件的光电检测电路、PLC控制电路、键盘与显示电路设计方法;软件部分采用模块化设计,给出了数据处理及控制流程设计思路.样机实验结果表明,系统采用独特设计的太阳光跟踪定性装置、跟踪控制器及传动执行机构,在有阳光的天气时,全天候使太阳能电池板垂直于太阳,大大提高了太阳能电地板的发电量.

  20. Controller Design and Analysis of Spacecraft Automatic Levelling and Equalizing Hoist Device based on Hanging Point Adjustment

    Directory of Open Access Journals (Sweden)

    Tang Laiying

    2016-01-01

    Full Text Available Spacecraft Automatic Levelling and Equalizing Hoist Device (SALEHD is a kind of hoisting device developed for eccentric spacecraft level-adjusting, based on hanging point adjustment by utilizing XY-workbench. To make the device automatically adjust the spacecraft to be levelling, the controller for SALEHD was designed in this paper. Through geometry and mechanics analysis for SALEHD and the spacecraft, the mathematical model of the controller is established. And then, the link of adaptive control and the link of variable structure control were added into the controller to adapt the unknown parameter and eliminate the interference of support vehicle. The stability of the controller was analysed, through constructing Lyapunov energy function. It was proved that the controller system is asymptotically stable, and converged to origin that is equilibrium point. So the controller can be applied in SALEHD availably and safely.

  1. Hacking and penetration testing with low power devices

    CERN Document Server

    Polstra, Philip

    2014-01-01

    Hacking and Penetration Testing with Low Power Devices shows you how to perform penetration tests using small, low-powered devices that are easily hidden and may be battery-powered. It shows how to use an army of devices, costing less than you might spend on a laptop, from distances of a mile or more. Hacking and Penetration Testing with Low Power Devices shows how to use devices running a version of The Deck, a full-featured penetration testing and forensics Linux distribution, and can run for days or weeks on batteries due to their low power consumption. Author Philip Polstra shows how to

  2. Round robin performance testing of organic photovoltaic devices

    DEFF Research Database (Denmark)

    Gevorgyan, Suren; Zubillaga, Oihana; de Seoane, José María Vega

    2014-01-01

    This study addresses the issue of poor intercomparability of measurements of organic photovoltaic (OPV) devices among different laboratories. We present a round robin performance testing of novel OPV devices among 16 laboratories, organized within the framework of European Research Infrastructure...

  3. System and Component Software Specification, Run-time Verification and Automatic Test Generation Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The following background technology is described in Part 5: Run-time Verification (RV), White Box Automatic Test Generation (WBATG). Part 5 also describes how WBATG...

  4. Vertical Drop Testing and Simulation of Anthropomorphic Test Devices

    Science.gov (United States)

    Polanco, Michael A.; Littell, Justin D.

    2011-01-01

    A series of 14 vertical impact tests were conducted using Hybrid III 50th Percentile and Hybrid II 50th Percentile Anthropomorphic Test Devices (ATDs) at NASA Langley Research Center. The purpose of conducting these tests was threefold: to compare and contrast the impact responses of Hybrid II and Hybrid III ATDs under two different loading conditions, to compare the impact responses of the Hybrid III configured with a nominal curved lumbar spine to that of a Hybrid III configured with a straight lumbar spine, and to generate data for comparison with predicted responses from two commercially available ATD finite element models. The two loading conditions examined were a high magnitude, short duration acceleration pulse, and a low magnitude, long duration acceleration pulse, each created by using different paper honeycomb blocks as pulse shape generators in the drop tower. The test results show that the Hybrid III results differ from the Hybrid II results more for the high magnitude, short duration pulse case. The comparison of the lumbar loads for each ATD configuration show drastic differences in the loads seen in the spine. The analytical results show major differences between the responses of the two finite element models. A detailed discussion of possible sources of the discrepancies between the two analytical models is also provided.

  5. Automatic test of PLC program based on OPC%基于OPC的PLC程序自动化测试

    Institute of Scientific and Technical Information of China (English)

    王达; 赵千川; 马喜春

    2011-01-01

    可编程逻辑控制器(PLC)是一种应用非常广泛的工业控制装置.随着PLC程序的规模和复杂性不断增加,研究PLC程序的自动化测试方法具有重要的意义.将高级语言程序自动化测试的思想引入PLC程序测试中,提出了一种基于OPC的PLC程序自动化测试框架.针对病房监护程序,搭建了一个自动化测试系统,验证了所提测试框架的可行性.最后,结合案例分析了PLC程序自动化测试的优势与可能遇到的困难.%The programmable logic controller (PLC) is a kind of electrical device widely used in the industrial field. With the increasing size and complexity of PLC program, the study of its testing becomes very significant. A framework for the automatic test of PLC program based on OPC is proposed by introducing the idea of automatic test for programs written in advanced programming languages. In order to validate the feasibility of the proposed framework, an automatic test system is set up for a program used for ward care. Finally, based on the experimental study, the advantage of the automatic test for PLC program is analyzed, and the difficulties are discussed.

  6. Automatic detection of MLC relative position errors for VMAT using the EPID-based picket fence test

    Science.gov (United States)

    Christophides, Damianos; Davies, Alex; Fleckney, Mark

    2016-12-01

    Multi-leaf collimators (MLCs) ensure the accurate delivery of treatments requiring complex beam fluences like intensity modulated radiotherapy and volumetric modulated arc therapy. The purpose of this work is to automate the detection of MLC relative position errors  ⩾0.5 mm using electronic portal imaging device-based picket fence tests and compare the results to the qualitative assessment currently in use. Picket fence tests with and without intentional MLC errors were measured weekly on three Varian linacs. The picket fence images analysed covered a time period ranging between 14-20 months depending on the linac. An algorithm was developed that calculated the MLC error for each leaf-pair present in the picket fence images. The baseline error distributions of each linac were characterised for an initial period of 6 months and compared with the intentional MLC errors using statistical metrics. The distributions of median and one-sample Kolmogorov-Smirnov test p-value exhibited no overlap between baseline and intentional errors and were used retrospectively to automatically detect MLC errors in routine clinical practice. Agreement was found between the MLC errors detected by the automatic method and the fault reports during clinical use, as well as interventions for MLC repair and calibration. In conclusion the method presented provides for full automation of MLC quality assurance, based on individual linac performance characteristics. The use of the automatic method has been shown to provide early warning for MLC errors that resulted in clinical downtime.

  7. Problems of Automatic Test of Insulation in Cable Production

    Science.gov (United States)

    Red'ko, V. V.; Leonov, A. P.; Red'ko, L. A.; Bolgova, V. A.

    2016-01-01

    The article presents a qualitative and quantitative assessment of cable products insulation defects that can be reliably detected by means of the electrosparking control during the cable production process. The performance potential of technological control is evaluated: the limit of reliable detection of defective places in insulation taking into account the technical capabilities of modern control devices is marked.

  8. Automatic QRS complex detection algorithm designed for a novel wearable, wireless electrocardiogram recording device

    DEFF Research Database (Denmark)

    Saadi, Dorthe Bodholt; Egstrup, Kenneth; Branebjerg, Jens;

    2012-01-01

    We have designed and optimized an automatic QRS complex detection algorithm for electrocardiogram (ECG) signals recorded with the DELTA ePatch platform. The algorithm is able to automatically switch between single-channel and multi-channel analysis mode. This preliminary study includes data from ...

  9. TVWS devices spectrum mask test and analysis

    CSIR Research Space (South Africa)

    Lamola, MM

    2016-09-01

    Full Text Available White Spaces (TVWS) regulation in the USA and Europe allows channels 21 through 48 in the Ultra high frequency (UHF) band (SA channel) to be used but our device works from channel 29 to 39 corresponding to frequencies from 534 MHz to 622 MHz...-conversion of 1872 MHZ and converts 2.4 GHz channels 1 to 14 (2412 to 2484 MHZ) to 540 to 612 MHz. IV. MEASUREMENTS AND PROCEDURES With the devices and tools stated in the previous section we were able to control the TVWS card and measure the output signal...

  10. A Full Automatic Device for Sampling Small Solution Volumes in Photometric Titration Procedure Based on Multicommuted Flow System

    Science.gov (United States)

    Borges, Sivanildo S.; Vieira, Gláucia P.; Reis, Boaventura F.

    2007-01-01

    In this work, an automatic device to deliver titrant solution into a titration chamber with the ability to determine the dispensed volume of solution, with good precision independent of both elapsed time and flow rate, is proposed. A glass tube maintained at the vertical position was employed as a container for the titrant solution. Electronic devices were coupled to the glass tube in order to control its filling with titrant solution, as well as the stepwise solution delivering into the titration chamber. The detection of the titration end point was performed employing a photometer designed using a green LED (λ=545 nm) and a phototransistor. The titration flow system comprised three-way solenoid valves, which were assembled to allow that the steps comprising the solution container loading and the titration run were carried out automatically. The device for the solution volume determination was designed employing an infrared LED (λ=930 nm) and a photodiode. When solution volume delivered from proposed device was within the range of 5 to 105 μl, a linear relationship (R = 0.999) between the delivered volumes and the generated potential difference was achieved. The usefulness of the proposed device was proved performing photometric titration of hydrochloric acid solution with a standardized sodium hydroxide solution and using phenolphthalein as an external indicator. The achieved results presented relative standard deviation of 1.5%. PMID:18317510

  11. AN ALGORITHM FOR AUTOMATICALLY GENERATING BLACK-BOX TEST CASES

    Institute of Scientific and Technical Information of China (English)

    XuBaowen; NieChanghai; 等

    2003-01-01

    Selection of test cases plays a key role in improving testing efficiency.Black-box testing is an important way of testing,and is validity lies on the secection of test cases in some sense.A reasonable and effective method about the selection and generation of test cascs is urgently needed.This letter first introduces some usual methods on black-box test case generation,then proposes a new glgorithm based on interface parameters and discusses its properties,finally shows the effectiveness of the algorithm.

  12. AN ALGORITHM FOR AUTOMATICALLY GENERATING BLACK-BOX TEST CASES

    Institute of Scientific and Technical Information of China (English)

    Xu Baowen; Nie Changhai; Shi Qunfeng; Lu Hong

    2003-01-01

    Selection of test cases plays a key role in improving testing efficiency. Black-box testing is an important way of testing, and its validity lies on the selection of test cases in some sense. A reasonable and effective method about the selection and generation of test cases is urgently needed. This letter first introduces some usualmethods on black-box test case generation,then proposes a new algorithm based on interface parameters and discusses its properties, finally shows the effectiveness of the algorithm.

  13. A novel and compact nanoindentation device for in situ nanoindentation tests inside the scanning electron microscope

    Directory of Open Access Journals (Sweden)

    Hu Huang

    2012-03-01

    Full Text Available In situ nanomechanical tests provide a unique insight into mechanical behaviors of materials, such as fracture onset and crack propagation, shear band formation and so on. This paper presents a novel in situ nanoindentation device with dimensions of 103mm×74mm×60mm. Integrating the stepper motor, the piezoelectric actuator and the flexure hinge, the device can realize coarse adjustment of the specimen and precision loading and unloading of the indenter automatically. A novel indenter holder was designed to guarantee that the indenter penetrates into and withdraws from the specimen surface vertically. Closed-loop control of the indentation process was established to solve the problem of nonlinearity of the piezoelectric actuator and to enrich the loading modes. The in situ indentation test of Indium Phosphide (InP inside the scanning electron microscope (SEM was carried out and the experimental result indicates the feasibility of the developed device.

  14. Automatic Model-Based Generation of Parameterized Test Cases Using Data Abstraction

    NARCIS (Netherlands)

    Calamé, Jens R.; Ioustinova, Natalia; Pol, van de Jaco; Romijn, J.M.T.; Smith, G.; Pol, van de J.C.

    2007-01-01

    Developing test suites is a costly and error-prone process. Model-based test generation tools facilitate this process by automatically generating test cases from system models. The applicability of these tools, however, depends on the size of the target systems. Here, we propose an approach to gener

  15. A Method for Modeling the Virtual Instrument Automatic Test System Based on the Petri Net

    Institute of Scientific and Technical Information of China (English)

    MA Min; CHEN Guang-ju

    2005-01-01

    Virtual instrument is playing the important role in automatic test system. This paper introduces a composition of a virtual instrument automatic test system and takes the VXIbus based a test software platform which is developed by CAT lab of the UESTC as an example. Then a method to model this system based on Petri net is proposed. Through this method, we can analyze the test task scheduling to prevent the deadlock or resources conflict. At last, this paper analyzes the feasibility of this method.

  16. Automatic Test Case Generation in Object Oriented Programming

    Directory of Open Access Journals (Sweden)

    Tarun Dhar Diwan

    2012-06-01

    Full Text Available This paper presents a new methodology to select test cases from regression test suites. The selection strategy is based on analyzing the dynamic behavior of the applications that written in any programming language. Methods based on dynamic analysis are more safe and efficient. We design a technique that combine the code based technique and model based technique, to allow comparing the object oriented of an application that written in any programming language. We have developed a prototype tool that detect changes and select test cases from test suite.

  17. An algorithm used for quality criterion automatic measurement of band-pass filters and its device implementation

    Science.gov (United States)

    Liu, Qianshun; Liu, Yan; Yu, Feihong

    2013-08-01

    As a kind of film device, band-pass filter is widely used in pattern recognition, infrared detection, optical fiber communication, etc. In this paper, an algorithm for automatic measurement of band-pass filter quality criterion is proposed based on the proven theory calculation of derivate spectral transmittance of filter formula. Firstly, wavelet transform to reduce spectrum data noises is used. Secondly, combining with the Gaussian curve fitting and least squares method, the algorithm fits spectrum curve and searches the peak. Finally, some parameters for judging band-pass filter quality are figure out. Based on the algorithm, a pipeline for band-pass filters automatic measurement system has been designed that can scan the filter array automatically and display spectral transmittance of each filter. At the same time, the system compares the measuring result with the user defined standards to determine if the filter is qualified or not. The qualified product will be market with green color, and the unqualified product will be marked with red color. With the experiments verification, the automatic measurement system basically realized comprehensive, accurate and rapid measurement of band-pass filter quality and achieved the expected results.

  18. Four-terminal electrical testing device. [initiator bridgewire resistance

    Science.gov (United States)

    Robinson, Robert L. (Inventor); Graves, Thomas J. (Inventor); Hoffman, William C., III (Inventor)

    1987-01-01

    The invention relates to a four-terminal electrical connector device for testing and measuring unknown resistances of initiators used for starting pyrotechnic events aboard the space shuttle. The testing device minimizes contact resistance degradation effects and so improves the reliability of resistance measurements taken with the device. Separate and independent voltage sensing and current supply circuits each include a pair of socket contacts for mating engagement with the pins of the initiator. The unknown resistance that is measured by the device is the resistance of the bridgewire of the initiator which is required to be between 0.95 and 1.15 ohms.

  19. Photoresponsive carbohydrate-based giant surfactants: automatic vertical alignment of nematic liquid crystal for the remote-controllable optical device.

    Science.gov (United States)

    Kim, Dae-Yoon; Lee, Sang-A; Kang, Dong-Gue; Park, Minwook; Choi, Yu-Jin; Jeong, Kwang-Un

    2015-03-25

    Photoresponsive carbohydrate-based giant surfactants (abbreviated as CELAnD-OH) were specifically designed and synthesized for the automatic vertical alignment (VA) layer of nematic (N) liquid crystal (LC), which can be applied for the fabrication of remote-controllable optical devices. Without the conventional polymer-based LC alignment process, a perfect VA layer was automatically constructed by directly adding the 0.1 wt % CELA1D-OH in the N-LC media. The programmed CELA1D-OH giant surfactants in the N-LC media gradually diffused onto the substrates of LC cell and self-assembled to the expanded monolayer structure, which can provide enough empty spaces for N-LC molecules to crawl into the empty zones for the construction of VA layer. On the other hand, the CELA3D-OH giant surfactants forming the condensed monolayer structure on the substrates exhibited a planar alignment (PA) rather than a VA. Upon tuning the wavelength of light, the N-LC alignments were reversibly switched between VA and PA in the remote-controllable LC optical devices. Based on the experimental results, it was realized that understanding the interactions between N-LC molecules and amphiphilic giant surfactants is critical to design the suitable materials for the automatic LC alignment.

  20. A Model-Based Method for Content Validation of Automatically Generated Test Items

    Science.gov (United States)

    Zhang, Xinxin; Gierl, Mark

    2016-01-01

    The purpose of this study is to describe a methodology to recover the item model used to generate multiple-choice test items with a novel graph theory approach. Beginning with the generated test items and working backward to recover the original item model provides a model-based method for validating the content used to automatically generate test…

  1. Monitoring drip water isotope and element variability: A new device for automatic drip water collection

    Science.gov (United States)

    Breitenbach, S. F. M.; Gilbert, M.-J.; Kwiecien, O.; Seifert, R.; Fleitmann, D.

    2012-04-01

    Understanding cave drip water elemental and stable isotope composition (δD and δ18O) are vital for interpreting climate proxy records derived from stalagmites as palaeoclimate archives. Delineating the temporal changes in drip water chemistry to climatic and environmental fluctuations (such as rainfall amount, degassing, bioactivity etc.) is even more important if calibration is attempted between climatic parameters and stalagmite proxy records. Monitoring of remote study sites has often been limited by the ability to regularly and manually collect drip water samples over an extended period of time. One important complication to be considered for stable isotope analysis is that sampling vials must be closed air-tight, in order to avoid post-sampling evaporation of the sampled water. To overcome these limitations we developed an automated and programmable sampling device that can collect 12 ml of drip water at pre-defined time intervals. A total of 49 samples can be collected in a turret over a period of up to one year. The device is powered by widely available C-cell batteries and works in cave environments with positive air temperature. The autosampler has been installed and tested in Waldheim Cave, Switzerland, where we collected water at 24h intervals. We present preliminary data for the winter period December 2011 to March 2012.

  2. Configurable automatic detection and registration of fiducial frames for device-to-image registration in MRI-guided prostate interventions.

    Science.gov (United States)

    Tokuda, Junichi; Song, Sang-Eun; Tuncali, Kemal; Tempany, Clare; Hata, Nobuhiko

    2013-01-01

    We propose a novel automatic fiducial frame detection and registration method for device-to-image registration in MRI-guided prostate interventions. The proposed method does not require any manual selection of markers, and can be applied to a variety of fiducial frames, which consist of multiple cylindrical MR-visible markers placed in different orientations. The key idea is that automatic extraction of linear features using a line filter is more robust than that of bright spots by thresholding; by applying a line set registration algorithm to the detected markers, the frame can be registered to the MRI. The method was capable of registering the fiducial frame to the MRI with an accuracy of 1.00 +/- 0.73 mm and 1.41 +/- 1.06 degrees in a phantom study, and was sufficiently robust to detect the fiducial frame in 98% of images acquired in clinical cases despite the existence of anatomical structures in the field of view.

  3. Single Event Testing on Complex Devices: Test Like You Fly Versus Test-Specific Design Structures

    Science.gov (United States)

    Berg, Melanie D.; Label, Kenneth

    2016-01-01

    We present a mechanism for evaluating complex digital systems targeted for harsh radiation environments such as space. Focus is limited to analyzing the single event upset (SEU) susceptibility of designs implemented inside Field Programmable Gate Array (FPGA) devices. Tradeoffs are provided between application-specific versus test-specific test structures.

  4. Single Event Testing on Complex Devices: Test Like You Fly versus Test-Specific Design Structures

    Science.gov (United States)

    Berg, Melanie; LaBel, Kenneth A.

    2014-01-01

    We present a framework for evaluating complex digital systems targeted for harsh radiation environments such as space. Focus is limited to analyzing the single event upset (SEU) susceptibility of designs implemented inside Field Programmable Gate Array (FPGA) devices. Tradeoffs are provided between application-specific versus test-specific test structures.

  5. INTERFACE DEVICE FOR NONDESTRUCTIVE TESTING OF RESIDUAL SURFACE STRESSES

    Directory of Open Access Journals (Sweden)

    Gennady A. Perepelkin

    2016-01-01

    Full Text Available The paper considers the organization of connection of a personal computer with a device for nondestructive testing of residual surface stresses. The device works is based on the phenomenon of diffraction of ionizing radiation from the crystal lattice near the surface of the crystallites. Proposed software interface to the organization for each type of user: the device developers, administrators, users. Some aspects of the organization of communication microcontroller to a PC via USB-port

  6. Subscale Test Methods for Combustion Devices

    Science.gov (United States)

    Anderson, W. E.; Sisco, J. C.; Long, M. R.; Sung, I.-K.

    2005-01-01

    Stated goals for long-life LRE s have been between 100 and 500 cycles: 1) Inherent technical difficulty of accurately defining the transient and steady state thermochemical environments and structural response (strain); 2) Limited statistical basis on failure mechanisms and effects of design and operational variability; and 3) Very high test costs and budget-driven need to protect test hardware (aversion to test-to-failure). Ambitious goals will require development of new databases: a) Advanced materials, e.g., tailored composites with virtually unlimited property variations; b) Innovative functional designs to exploit full capabilities of advanced materials; and c) Different cycles/operations. Subscale testing is one way to address technical and budget challenges: 1) Prototype subscale combustors exposed to controlled simulated conditions; 2) Complementary to conventional laboratory specimen database development; 3) Instrumented with sensors to measure thermostructural response; and 4) Coupled with analysis

  7. SEMIOTIC MODELS AND AUTOMATIZATION OF PEDAGOGICAL TESTS DESIGN

    Directory of Open Access Journals (Sweden)

    Gennady N. Zverev

    2013-01-01

    Full Text Available The paper deals with the problems of construction objective models of educational course, learning processes, control of learning results. We considered the possibility of automated test generation using formalized concepts of testology, semiotic and mathematical models of pedagogical processes. 

  8. Invariant-Based Automatic Testing of Modern Web Applications

    NARCIS (Netherlands)

    Mesbah, A.; Van Deursen, A.; Roest, D.

    2011-01-01

    AJAX-based Web 2.0 applications rely on stateful asynchronous client/server communication, and client-side run-time manipulation of the DOM tree. This not only makes them fundamentally different from traditional web applications, but also more error-prone and harder to test. We propose a method for

  9. SABATPG-A Structural Analysis Based Automatic Test Generation System

    Institute of Scientific and Technical Information of China (English)

    李忠诚; 潘榆奇; 闵应骅

    1994-01-01

    A TPG system, SABATPG, is given based on a generic structural model of large circuits. Three techniques of partial implication, aftereffect of identified undetectable faults and shared sensitization with new concepts of localization and aftereffect are employed in the system to improve FAN algorithm. Experiments for the 10 ISCAS benchmark circuits show that the computing time of SABATPG for test generation is 19.42% less than that of FAN algorithm.

  10. Towards parsimony in habit measurement: testing the convergent and predictive validity of an automaticity subscale of the Self-Report Habit Index

    National Research Council Canada - National Science Library

    Gardner, Benjamin; Abraham, Charles; Lally, Phillippa; de Bruijn, Gert-Jan

    2012-01-01

    .... Drawing on recent theorising suggesting that automaticity is the 'active ingredient' of habit-behaviour relationships, we tested whether an automaticity-specific SRHI subscale could capture habit...

  11. Software test attacks to break mobile and embedded devices

    CERN Document Server

    Hagar, Jon Duncan

    2013-01-01

    Address Errors before Users Find Them Using a mix-and-match approach, Software Test Attacks to Break Mobile and Embedded Devices presents an attack basis for testing mobile and embedded systems. Designed for testers working in the ever-expanding world of ""smart"" devices driven by software, the book focuses on attack-based testing that can be used by individuals and teams. The numerous test attacks show you when a software product does not work (i.e., has bugs) and provide you with information about the software product under test. The book guides you step by step starting with the basics. It

  12. Matching Automatic Gain Control Across Devices in Bimodal Cochlear Implant Users

    NARCIS (Netherlands)

    Veugen, L.C.E.; Chalupper, J.; Snik, A.F.M.; Opstal, A.J. van; Mens, L.H.M.

    2016-01-01

    OBJECTIVES: The purpose of this study was to improve bimodal benefit in listeners using a cochlear implant (CI) and a hearing aid (HA) in contralateral ears, by matching the time constants and the number of compression channels of the automatic gain control (AGC) of the HA to the CI. Equivalent AGC

  13. Electrode holder useful in a corrosion testing device

    Science.gov (United States)

    Murphy, Jr., Robert J.; Jamison, Dale E.

    1986-01-01

    The present invention is directed to an apparatus and method for holding one or more test electrodes of precisely known exposed surface area. The present invention is particularly useful in a device for determining the corrosion properties of the materials from which the test electrodes have been formed. The present invention relates to a device and method for holding the described electrodes wherein the exposed surface area of the electrodes is only infinitesimally decreased. Further, in the present invention the exposed, electrically conductive surface area of the contact devices is small relative to the test electrode surface area. The holder of the present invention conveniently comprises a device for contacting and engaging each test electrode at two point contacts infinitesimally small in relation to the exposed surface area of the electrodes.

  14. Micro-Combined Heat and Power Device Test Facility

    Data.gov (United States)

    Federal Laboratory Consortium — NIST has developed a test facility for micro-combined heat and power (micro-CHP) devices to measure their performance over a range of different operating strategies...

  15. Accelerated life testing and temperature dependence of device characteristics in GaAs CHFET devices

    Science.gov (United States)

    Gallegos, M.; Leon, R.; Vu, D. T.; Okuno, J.; Johnson, A. S.

    2002-01-01

    Accelerated life testing of GaAs complementary heterojunction field effect transistors (CHFET) was carried out. Temperature dependence of single and synchronous rectifier CHFET device characteristics were also obtained.

  16. Testing Quantum Devices: Practical Entanglement Verification in Bipartite Optical Systems

    OpenAIRE

    Häseler, Hauke; Moroder, Tobias; Lütkenhaus, Norbert

    2007-01-01

    We present a method to test quantum behavior of quantum information processing devices, such as quantum memories, teleportation devices, channels and quantum key distribution protocols. The test of quantum behavior can be phrased as the verification of effective entanglement. Necessary separability criteria are formulated in terms of a matrix of expectation values in conjunction with the partial transposition map. Our method is designed to reduce the resources for entanglement verification. A...

  17. Study of the in vitro cytotoxicity testing of medical devices.

    Science.gov (United States)

    Li, Weijia; Zhou, Jing; Xu, Yuyin

    2015-09-01

    The cytotoxicity test is one of the biological evaluation and screening tests that use tissue cells in vitro to observe the cell growth, reproduction and morphological effects by medical devices. Cytotoxicity is preferred as a pilot project test and an important indicator for toxicity evaluation of medical devices as it is simple, fast, has a high sensitivity and can save animals from toxicity. Three types of cytotoxicity test are stated in the International Organization for Standardization 109993-5: Extract, direct contact and indirect contact tests. The xCELLigence real-time cell analysis system shows a significant potential in regards to cytotoxicity in recent years. The present review provides a brief insight into the in vitro cytotoxicity testing of medical devices.

  18. Automatic analysis of the micronucleus test in primary human lymphocytes using image analysis.

    Science.gov (United States)

    Frieauff, W; Martus, H J; Suter, W; Elhajouji, A

    2013-01-01

    The in vitro micronucleus test (MNT) is a well-established test for early screening of new chemical entities in industrial toxicology. For assessing the clastogenic or aneugenic potential of a test compound, micronucleus induction in cells has been shown repeatedly to be a sensitive and a specific parameter. Various automated systems to replace the tedious and time-consuming visual slide analysis procedure as well as flow cytometric approaches have been discussed. The ROBIAS (Robotic Image Analysis System) for both automatic cytotoxicity assessment and micronucleus detection in human lymphocytes was developed at Novartis where the assay has been used to validate positive results obtained in the MNT in TK6 cells, which serves as the primary screening system for genotoxicity profiling in early drug development. In addition, the in vitro MNT has become an accepted alternative to support clinical studies and will be used for regulatory purposes as well. The comparison of visual with automatic analysis results showed a high degree of concordance for 25 independent experiments conducted for the profiling of 12 compounds. For concentration series of cyclophosphamide and carbendazim, a very good correlation between automatic and visual analysis by two examiners could be established, both for the relative division index used as cytotoxicity parameter, as well as for micronuclei scoring in mono- and binucleated cells. Generally, false-positive micronucleus decisions could be controlled by fast and simple relocation of the automatically detected patterns. The possibility to analyse 24 slides within 65h by automatic analysis over the weekend and the high reproducibility of the results make automatic image processing a powerful tool for the micronucleus analysis in primary human lymphocytes. The automated slide analysis for the MNT in human lymphocytes complements the portfolio of image analysis applications on ROBIAS which is supporting various assays at Novartis.

  19. Development of an Automatic Testing Platform for Aviator’s Night Vision Goggle Honeycomb Defect Inspection

    National Research Council Canada - National Science Library

    Bo-Lin Jian; Chao-Chung Peng

    2017-01-01

    .... This work also developed a test platform for sharpness measurement. It demonstrates that the honeycomb defects can be precisely recognized and the number of the defects can also be determined automatically during the inspection. Most importantly, the proposed approach significantly reduces the time consumption, as well as human assessment error during the night vision goggle inspection procedures.

  20. 77 FR 1591 - Energy Conservation Program: Test Procedure for Automatic Commercial Ice Makers

    Science.gov (United States)

    2012-01-11

    ...-AC38 Energy Conservation Program: Test Procedure for Automatic Commercial Ice Makers AGENCY: Office of... and Background A. Authority Title III of the Energy Policy and Conservation Act (42 U.S.C. 6291, et... subject of today's rulemaking. DOE's energy conservation program, established under EPCA,...

  1. Development of automatic Ultrasonic testing equipment for reactor pressure vessel

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Kor R.; Kim, Jae H.; Lee, Jae C.

    1996-06-01

    The selected weld areas of a reactor pressure vessel and adjacent piping are examined by the remote mechanized ultrasonic testing (MUT) equipment. Since the MUT equipment was purchased from southwest Research Institute (SwRI) in April 1985, 15 inservice inspections and 5 preservice inspections are performed with this MUT equipment. However due to the old age of the equipment and frequent movements to plant sites, the reliability of examination was recently decreased rapidly and it is very difficult to keep spare parts. In order to resolve these problems and to meet the strong request from plant sites, we intend to develop a new 3-axis control system including hardware and software. With this control system, we expect more efficient and reliable examination of the nozzle to shell weld areas, which is specified in ASME Code Section XI. The new 3-axis control system hardware and software were designed and development of our own control system, the advanced technologies of computer control mechanism were established and examination reliability of the nozzle to shell weld area was improved. With the development of our 3-axis control system for PaR ISI-2 computer control system, the reliability of nozzle to shell weld area examination has been improved. The established technologies from the development and detailed analysis of existing control system, are expected to be applied to the similar control systems in nuclear power plants. (author). 12 refs., 4 tabs., 33 figs.

  2. Future opportunities for advancing glucose test device electronics.

    Science.gov (United States)

    Young, Brian R; Young, Teresa L; Joyce, Margaret K; Kennedy, Spencer I; Atashbar, Massood Z

    2011-09-01

    Advancements in the field of printed electronics can be applied to the field of diabetes testing. A brief history and some new developments in printed electronics components applicable to personal test devices, including circuitry, batteries, transmission devices, displays, and sensors, are presented. Low-cost, thin, and lightweight materials containing printed circuits with energy storage or harvest capability and reactive/display centers, made using new printing/imaging technologies, are ideal for incorporation into personal-use medical devices such as glucose test meters. Semicontinuous rotogravure printing, which utilizes flexible substrates and polymeric, metallic, and/or nano "ink" composite materials to effect rapidly produced, lower-cost printed electronics, is showing promise. Continuing research advancing substrate, "ink," and continuous processing development presents the opportunity for research collaboration with medical device designers.

  3. Derivation and Testing of Computer Algorithms for Automatic Real-Time Determination of Space Vehicle Potentials in Various Plasma Environments

    Science.gov (United States)

    1988-05-31

    COMPUTER ALGORITHMS FOR AUTOMATIC REAL-TIME DETERMINATION OF SPACE VEHICLE POTENTIALS IN VARIOUS PLASMA ENVIRONMENTS May 31, 1988 Stanley L. Spiegel...crrnaion DiviSiofl 838 12 2 DERIVATION AND TESTING OF COMPUTER ALGORITHMS FOR AUTOMATIC REAL-TIME DETERMINATION OF SPACE VEHICLE POTENTIALS IN VARIOUS...S.L., "Derivation and testing of computer algorithms for automatic real time determination of space vehicle poteuatials in various plasma

  4. Development of an Automatic Testing Platform for Aviator's Night Vision Goggle Honeycomb Defect Inspection.

    Science.gov (United States)

    Jian, Bo-Lin; Peng, Chao-Chung

    2017-06-15

    Due to the direct influence of night vision equipment availability on the safety of night-time aerial reconnaissance, maintenance needs to be carried out regularly. Unfortunately, some defects are not easy to observe or are not even detectable by human eyes. As a consequence, this study proposed a novel automatic defect detection system for aviator's night vision imaging systems AN/AVS-6(V)1 and AN/AVS-6(V)2. An auto-focusing process consisting of a sharpness calculation and a gradient-based variable step search method is applied to achieve an automatic detection system for honeycomb defects. This work also developed a test platform for sharpness measurement. It demonstrates that the honeycomb defects can be precisely recognized and the number of the defects can also be determined automatically during the inspection. Most importantly, the proposed approach significantly reduces the time consumption, as well as human assessment error during the night vision goggle inspection procedures.

  5. Comparison of Efficacy and Tolerance of Automatic Continuous Positive Airway Pressure Devices With the Optimum Continuous Positive Airway Pressure.

    Science.gov (United States)

    Tommi, George; Aronow, Wilbert S; Sheehan, John C; McCleay, Matthew T; Meyers, Patrick G

    Patients diagnosed with obstructive sleep apnea syndrome were randomly placed on automatic continuous positive airway pressure (ACPAP) for 2 hours followed by manual titration for the rest of the night. One hundred sixty-one patients entered the study, with at least 50 patients titrated with each of 3 ACPAP devices. The optimum continuous positive airway pressure (CPAP) was defined as the lowest pressure with an apnea-hypoxia index of ≤5/hr, which ranged from 4 cm to 18 cm. Success with ACPAP was approximately 60%-80% when the optimum CPAP was 4-6 cm but fell to below 30% if the optimum CPAP was ≥8 cm (P = 0.001). Average ACPAP ranged from 2 to 10 cm below the optimum level if the optimum CPAP was ≥8 cm. Patients who responded to a low CPAP but deteriorated on higher pressures failed to respond to any of the automatic devices. We recommend that CPAP titration be performed manually before initiation of ACPAP in patients with obstructive sleep apnea. The basal pressure for ACPAP should be the optimum pressure obtained by manual titration. Limits on the upper level of ACPAP may be necessary for patients who deteriorate on higher positive pressures.

  6. Devices for fatigue testing of electroplated nickel (MEMS)

    DEFF Research Database (Denmark)

    Larsen, Kristian Pontoppidan; Ravnkilde, J. T.; Ginnerup, Morten;

    2002-01-01

    In-situ fatigue test devices with integrated electrostatic actuator were fabricated in electroplated nanocrystalline nickel (nano-nickel). The devices feature in-plane approximately pure bending with fixed displacement of the test specimen of the dimensions: widths from 2μm to 3.7μm, a height of 7......μm and an effective length from 4μm to 27μm. Maximum stresses of the test beam were calculated to be 500MPa to 2100MPa by use of FEM tools. The test results indicate very promising fatigue properties of nano-nickel, as none of the test devices have shown fatigue failure or even initiation of cracks...

  7. [Automation in histology: evaluation of a device for automatic covering of histologic slides].

    Science.gov (United States)

    Lampertico, P; Gambacorta, M

    1994-02-01

    A new kind of instrument (Tissue-Tek Coverslipper) has been utilized by the Department of Surgical Pathology Cà Granda Hospital, Milano, for automatic mounting of cytohistological slides, using a pluristratified plastic film, instead of usual coverglasses. The introduction of this coverslipper has reduced the answer time, the technical work and the ambiental pollution. This coverslipper seems to be reliable, useful and very speedy; the optical quality of the slides was similar to conventional ones in our experience.

  8. Modeling Technology for Automatic Test System Software Based on Automatic Test Markup Language Standard%基于ATML标准的ATS软件建模技术

    Institute of Scientific and Technical Information of China (English)

    杨占才; 王红; 范利花; 张桂英; 杨小辉

    2013-01-01

      论述了国外ATML标准体系结构和构成ATML标准所有子模型的描述方法,提出了在现有ATS软件平台基础上,实现兼容ATML标准所需的建模流程设计、模型识别及模型运行流程设计等技术途径,为实现ATS软件平台的通用性、开放性及武器装备各种维护级别的测试资源的共享奠定了技术基础。%  all the model definition method, system architecture and the expression manner for ATML standard are discussed. Several major technology problems for the existing automatic test system software platform compatible with ATML standard are presented, such as the design for modeling flow, model identification and model running flow. All the Technology Foundation is supplied for resolving the general and open issues of the automatic test system software platform, and the testing resources share for all the maintenance level.

  9. Establishment of an indocyanine green test using an automatic chemistry analyzer.

    Science.gov (United States)

    Seong, Moon-Woo; Song, Sang-Hoon; Oh, Joo-Young; Park, Joong-Won; Lee, Do-Hoon

    2006-01-01

    The indocyanine green (ICG) clearance test has been used to assess the reserve of hepatic function. This method is based on the spectrometric measurement of its plasma concentration at maximum wavelength of 805 nm, which requires a spectrophotometer and associated maintenance. We established an ICG clearance test using a Toshiba 200FR automatic chemistry analyzer that can be tuned to a wavelength of approximately 805 nm. Five pooled sera spiked from 0 to 4.0 mg/dL were analyzed for linearity test and precision was determined at five levels in the range 0.1-2.0 mg/dL. The ICG retention rate at 15 min (R15) was determined for 38 patients using a conventional method and our method. The ICG clearance test using the automatic chemistry analyzer showed good linearity, and precision ranged from 0.3% to 1.0% for within-run CVs and from 0.6% to 4.7% for total CVs. The degree of agreement between the two methods was also acceptable (mean difference of 1.5%). It is expected that the ICG test using the automatic chemistry analyzer can replace the conventional ICG clearance test, considering the excellent agreement, good precision and linearity over a clinically relevant range.

  10. Human bedside evaluation versus automatic responsiveness testing in epilepsy (ARTiE).

    Science.gov (United States)

    Touloumes, George; Morse, Elliot; Chen, William C; Gober, Leah; Dente, Jennifer; Lilenbaum, Rachel; Katzenstein, Emily; Pacelli, Ashley; Johnson, Emily; Si, Yang; Sivaraju, Adithya; Grover, Eric; Khozein, Rebecca; Cunningham, Courtney; Hirsch, Lawrence J; Blumenfeld, Hal

    2016-01-01

    Evaluation of behavioral impairment during epileptic seizures is critical for medical decision making, including accurate diagnosis, recommendations for driving, and presurgical evaluation. We investigated the quality of behavioral testing during inpatient video-electroencephalography (EEG) monitoring at an established epilepsy center, and introduce a technical innovation that may improve clinical care. We retrospectively reviewed video-EEG data from 152 seizures in 33 adult or pediatric patients admitted for video-EEG monitoring. Behavioral testing with questions or commands was performed in only 50% of seizures ictally, 73% of seizures postictally, and 80% with either ictal or postictal testing combined. Furthermore, the questions or commands were highly inconsistent and were performed by nonmedical personnel in about one fourth of cases. In an effort to improve this situation we developed and here introduce Automatic Responsiveness Testing in Epilepsy (ARTiE), a series of video-recorded behavioral tasks automatically triggered to play in the patient's room by computerized seizure detection. In initial technical testing using prerecorded or live video-EEG data we found that ARTiE is initiated reliably by automatic seizure detection. With additional clinical testing we hope that ARTiE will succeed in providing comprehensive and reliable behavioral evaluation during seizures for people with epilepsy to greatly improve their clinical care.

  11. X-Ray-Diffraction Tests Of Irradiated Electronic Devices: I

    Science.gov (United States)

    Shaw, David C.; Lowry, Lynn E.; Barnes, Charles E.

    1993-01-01

    X-ray-diffraction tests performed on aluminum conductors in commercial HI1-507A complementary metal oxide/semiconductor (CMOS) integrated-circuit analog multiplexers, both before and after circuits exposed to ionizing radiation from Co(60) source, and after postirradiation annealing at ambient and elevated temperatures. Tests in addition to electrical tests performed to determine effects of irradiation and of postirradiation annealing on electrical operating characteristics of circuits. Investigators sought to determine whether relationship between effects of irradiation on devices and physical stresses within devices. X-ray diffraction potentially useful for nondestructive measurement of stresses.

  12. Sleep apnea diagnosis using an ECG Holter device including a nasal pressure (NP) recording: validation of visual and automatic analysis of nasal pressure versus full polysomnography.

    Science.gov (United States)

    Pépin, Jean-Louis; Defaye, Pascal; Vincent, Elodie; Christophle-Boulard, Sylvain; Tamisier, Renaud; Lévy, Patrick

    2009-06-01

    New simplified techniques for diagnosing sleep apnea should be specially tailored for easy use in cardiologic practice. e dedicated one of the channels of a Holter Electrocardiogram (ECG) device (SpiderView() ELA Medical, France) to nasal pressure (NP) recordings. We also developed an automatic analysis of NP signal providing an apnea-hypopnea index (AHI) for physicians without the know-how in sleep medicine. Thirty-four unselected patients referred for symptoms suggesting sleep apnea underwent a polysomnography (PSG) with simultaneous NP and Holter ECG recordings. An expert blinded to PSG results visually scored the Holter plus NP recordings. The results of the AHI obtained in PSG (AHI-PSG) were compared, respectively, to the AHI-NP obtained by visual analysis and automatic analysis (AHI-NP Auto) of Holter ECG nasal pressure. In 10 randomly selected subjects (development set), the best cut-off on Holter ECG for diagnosing sleep apnea patients as defined by AHI>20/h in PSG was determined at 35 events/h by a receiver operator curve (ROC) analysis. Prospective testing of this threshold was then performed in 19 subjects (test set). For visually scored recordings of Holter ECG plus NP, we obtained a negative predictive value (NPV) of 80% and a positive predictive value (PPV) of 100% for sleep apnea. The area under the ROC curve was 0.97. For the automatic analysis, the NPV was 86% and the PPV value 100%. The area under the ROC curve was 0.85. NP recording using a Holter system is an efficient and easy-to-use tool for screening for sleep-disordered breathing in routine cardiology practice.

  13. Development of automatic knob-generation tool for the protection devices in the LHC

    CERN Document Server

    Koulouris, Aimilianos

    2013-01-01

    In the LHC transfer lines, the beam is extremely well controlled and confined. This is managed through a wide variety of superconducting magnets, which focus, defocus and bend the beam. As for the control part, there are numerous monitoring devices co-operating with the SCADA systems, all working for the protection of the instruments and the people. Our work, in particular, falls under the beam transfer lines, TI2 and TI8, between the SPS and the LHC. The protection devices in the transfer lines need to be set up according to the optics of the beam, namely the trajectory inside the beam-pipe. This means that, depending on the trajectory of the beam inside the beam-pipe and the positioning of the protection devices around the beam-pipe, certain adjustments need to be made, so that the beam will not damage or even affect the monitoring devices.

  14. Enhanced Automatic Question Creator--EAQC: Concept, Development and Evaluation of an Automatic Test Item Creation Tool to Foster Modern e-Education

    Science.gov (United States)

    Gutl, Christian; Lankmayr, Klaus; Weinhofer, Joachim; Hofler, Margit

    2011-01-01

    Research in automated creation of test items for assessment purposes became increasingly important during the recent years. Due to automatic question creation it is possible to support personalized and self-directed learning activities by preparing appropriate and individualized test items quite easily with relatively little effort or even fully…

  15. Research of in—service sipping test device

    Institute of Scientific and Technical Information of China (English)

    DengJun-Xian; XuYu-Ming; 等

    1998-01-01

    Sipping test device is used to identify the tightness of the irradiated fuel assembly during refuelling campaign.The gas is selected as the medium and the xenon-133 as the indicating nuclide,The device consists of the gas system,the γ-activity detection and measurement system,the power supply and signal system,the mechanical components and parts.The device has satisfactory functions,e.g.easy operation,indication in instrumentation,chart record and acoustic alarm,which can meet the operation demand of the nuclear reactor.

  16. Reproduction of Realistic Background Noise for Testing Telecommunications Devices

    DEFF Research Database (Denmark)

    Gil Corrales, Juan David; Song, Wookeun; MacDonald, Ewen

    2015-01-01

    A method for reproduction of sound, based on crosstalk cancellation using inverse filters, was implemented in the context of testing telecommunications devices. The effect of the regularization parameter, number of loudspeakers, type of background noise, and a technique to attenuate audible...... artifacts, were investigated. The quality of the reproduced sound was evaluated both objectively and subjectively with respect to the reference sounds, at points where telecommunications devices would be potentially placed around the head. The highest regularization value gave the best results...

  17. Automatic Detection of Childhood Absence Epilepsy Seizures: Toward a Monitoring Device

    DEFF Research Database (Denmark)

    Duun-Henriksen, Jonas; Madsen, Rasmus E.; Remvig, Line S.;

    2012-01-01

    long-term prognoses, balancing antiepileptic effects and side effects. The electroencephalographic appearance of paroxysms in childhood absence epilepsy is fairly homogeneous, making it feasible to develop patient-independent automatic detection. We implemented a state-of-the-art algorithm...... to investigate the performance of paroxysm detection. Using only a single scalp electroencephalogram channel from 20 patients with a total of 125 paroxysms >2 seconds, 97.2% of paroxysms could be detected with no false detections. This result leads us to recommend further investigations of tiny, one......-channel electroencephalogram systems in an ambulatory setting....

  18. Using automatic item generation to create multiple-choice test items.

    Science.gov (United States)

    Gierl, Mark J; Lai, Hollis; Turner, Simon R

    2012-08-01

    Many tests of medical knowledge, from the undergraduate level to the level of certification and licensure, contain multiple-choice items. Although these are efficient in measuring examinees' knowledge and skills across diverse content areas, multiple-choice items are time-consuming and expensive to create. Changes in student assessment brought about by new forms of computer-based testing have created the demand for large numbers of multiple-choice items. Our current approaches to item development cannot meet this demand. We present a methodology for developing multiple-choice items based on automatic item generation (AIG) concepts and procedures. We describe a three-stage approach to AIG and we illustrate this approach by generating multiple-choice items for a medical licensure test in the content area of surgery. To generate multiple-choice items, our method requires a three-stage process. Firstly, a cognitive model is created by content specialists. Secondly, item models are developed using the content from the cognitive model. Thirdly, items are generated from the item models using computer software. Using this methodology, we generated 1248 multiple-choice items from one item model. Automatic item generation is a process that involves using models to generate items using computer technology. With our method, content specialists identify and structure the content for the test items, and computer technology systematically combines the content to generate new test items. By combining these outcomes, items can be generated automatically. © Blackwell Publishing Ltd 2012.

  19. High bioethanol titre from Manihot glaziovii through fed-batch simultaneous saccharification and fermentation in Automatic Gas Potential Test System.

    Science.gov (United States)

    Moshi, Anselm P; Crespo, Carla F; Badshah, Malik; Hosea, Kenneth M M; Mshandete, Anthony Manoni; Mattiasson, Bo

    2014-03-01

    A process for the production of high bioethanol titre was established through fed-batch and simultaneous saccharification and fermentation (FB-SSF) of wild, non-edible cassava Manihot glaziovii. FB-SSF allowed fermentation of up to 390g/L of starch-derived glucose achieving high bioethanol concentration of up to 190g/L (24% v/v) with yields of around 94% of the theoretical value. The wild cassava M. glaziovii starch is hydrolysable with a low dosage of amylolytic enzymes (0.1-0.15% v/w, Termamyl® and AMG®). The Automatic Gas Potential Test System (AMPTS) was adapted to yeast ethanol fermentation and demonstrated to be an accurate, reliable and flexible device for studying the kinetics of yeast in SSF and FB-SSF. The bioethanol derived stoichiometrically from the CO2 registered in the AMPTS software correlated positively with samples analysed by HPLC (R(2)=0.99).

  20. Automatic device for measuring biomechanical properties of cadaveric lumbar vertebrae of the human spine

    Science.gov (United States)

    Bartoněk, Luděk.; Janák, Vladislav; Keprt, Jiří

    2016-12-01

    A new special second-generation computer-controlled device has been developed for measuring biomechanical characteristics of the lower part of the spine vertebras L1-L5 [1]. During straining and measurement of the rigidity of the sample as a whole it is also necessary to observe the movement of individual parts of the sample and to measure their mechanical resistances. The measurement of displacement and rotation of individual parts of the studied model was evaluated by optical methods based on the principle of moiré interferometry and fast Fourier transform [2]. During this device development and its verification the lumbar samples were replaced with a system of wooden rollers with system discrete rubber pads. The new computer-controlled device containing four stepper motors, four strain gauges and two CCD cameras.

  1. An automatic attenuator device for x-ray detectors at high counting rate

    Science.gov (United States)

    Alvarez, J.; Paiser, E.; Capitan, M. J.

    2002-07-01

    In this article we describe an attenuator device for reducing/controlling the pulse detector counting losses at a high counting rate. The electronics are based on a direct measure of the detector dead time from the analog output signal at the end of the detection chain. Taking into account this parameter the attenuator device decides to reduce/enhance the number of photons that arrive at the detector by inserting/extracting the necessary number of attenuation foils in the x-ray beam path. In that way the number of events in the incoming signal are reduced and the "apparent dynamic range" of the detector is increased.

  2. Fighting Testing ACAT/FRRP: Automatic Collision Avoidance Technology/Fighter Risk Reduction Project

    Science.gov (United States)

    Skoog, Mark A.

    2009-01-01

    This slide presentation reviews the work of the Flight testing Automatic Collision Avoidance Technology/Fighter Risk Reduction Project (ACAT/FRRP). The goal of this project is to develop common modular architecture for all aircraft, and to enable the transition of technology from research to production as soon as possible to begin to reduce the rate of mishaps. The automated Ground Collision Avoidance System (GCAS) system is designed to prevent collision with the ground, by avionics that project the future trajectory over digital terrain, and request an evasion maneuver at the last instance. The flight controls are capable of automatically performing a recovery. The collision avoidance is described in the presentation. Also included in the presentation is a description of the flight test.

  3. 高精度PCB的自动测试%Automatic Test of PCB for High Density

    Institute of Scientific and Technical Information of China (English)

    刘义敏

    2001-01-01

    @@ 随着电子工业的迅猛发展,PCB的复杂程度也越来越高.在PCB生产厂家,自动光学检查仪(Automatic Optical Inspector)以及通断测试机(Electrical Test)是检测的两种关键设备.经过多年的发展,它们的功能已越来越完善.

  4. Abrasion Testing of Critical Components of Hydrokinetic Devices

    Energy Technology Data Exchange (ETDEWEB)

    Worthington, Monty [ORPC Alaska; Ali, Muhammad [Ohio University; Ravens, Tom [University of Alaska Anchorage

    2013-12-06

    The objective of the Abrasion Testing of Critical Components of Hydrokinetic Devices (Project) was to test critical components of hydrokinetic devices in waters with high levels of suspended sediment – information that is widely applicable to the hydrokinetic industry. Tidal and river sites in Alaska typically have high suspended sediment concentrations. High suspended sediment also occurs in major rivers and estuaries throughout the world and throughout high latitude locations where glacial inputs introduce silt into water bodies. In assessing the vulnerability of technology components to sediment induced abrasion, one of the greatest concerns is the impact that the sediment may have on device components such as bearings and seals, failures of which could lead to both efficiency loss and catastrophic system failures.

  5. Software Sub-system in Loading Automatic Test System for the Measurement of Power Line Filters

    Directory of Open Access Journals (Sweden)

    Yu Bo

    2017-01-01

    Full Text Available The loading automatic test system for measurement of power line filters are in urgent demand. So the software sub-system of the whole test system was proposed. Methods: structured the test system based on the virtual instrument framework, which consisted of lower and up computer and adopted the top down approach of design to perform the system and its modules, according to the measurement principle of the test system. Results: The software sub-system including human machine interface, data analysis and process software, expert system, communication software, control software in lower computer, etc. had been designed. Furthermore, it had been integrated into the entire test system. Conclusion: This sub-system provided a fiendly software platform for the whole test system, and had many advantages such as strong functions, high performances, low prices. It not only raises the test efficiency of EMI filters, but also renders some creativities.

  6. Consensus stability testing protocols for organic photovoltaic materials and devices

    DEFF Research Database (Denmark)

    Reese, Matthew O.; Gevorgyan, Suren; Jørgensen, Mikkel

    2011-01-01

    Procedures for testing organic solar cell devices and modules with respect to stability and operational lifetime are described. The descriptions represent a consensus of the discussion and conclusions reached during the first 3 years of the international summit on OPV stability (ISOS). The proced...

  7. X-Ray-Diffraction Tests Of Irradiated Electronic Devices: II

    Science.gov (United States)

    Shaw, David C.; Lowry, Lynn E.; Barnes, Charles E.

    1993-01-01

    Report describes research on use of x-ray diffraction to measure stresses in metal conductors of complementary metal oxide/semiconductor (CMOS) integrated circuits exposed to ionizing radiation. Expanding upon report summarized in "X-Ray-Diffraction Tests Of Irradiated Electronic Devices: I" (NPO-18803), presenting data further suggesting relationship between electrical performances of circuits and stresses and strains in metal conductors.

  8. Consensus stability testing protocols for organic photovoltaic materials and devices

    NARCIS (Netherlands)

    Reese, M.O.; Gevorgyan, S.A.; Jørgensen, M.; Bundgaard, E.; Kurtz, S.R.; Ginley, D.S.; Olson, D.C.; Lloyd, M.T.; Morvillo, P.; Katz, E.A.; Elschner, A.; Haillant, O.; Currier, T.R.; Shrotriya, V.; Hermenau, M.; Riede, M.; Kirov, K.R.; Trimmel, G.; Rath, T.; Inganäs, O.; Zhang, F.; Andersson, M.; Tvingstedt, K.; Lira-Cantu, M.; Laird, D.; McGuiness, C.; Gowrisanker, S.; Pannone, M.; Xiao, M.; Hauch, J.; Steim, R.; Delongchamp, D.M.; Rösch, R.; Hoppe, H.; Espinosa, N.; Urbina, A.; Yaman-Uzunoglu, G.; Bonekamp, J.-B.; Breemen, A.J.J.M. van; Girotto, C.; Voroshazi, E.; Krebs, F.C.

    2011-01-01

    Procedures for testing organic solar cell devices and modules with respect to stability and operational lifetime are described. The descriptions represent a consensus of the discussion and conclusions reached during the first 3 years of the international summit on OPV stability (ISOS). The procedure

  9. Standard practice for torque calibration of testing machines and devices

    CERN Document Server

    American Society for Testing and Materials. Philadelphia

    2009-01-01

    1.1 This practice covers procedures and requirements for the calibration of torque for static and quasi-static torque capable testing machines or devices. These may, or may not, have torque indicating systems and include those devices used for the calibration of hand torque tools. Testing machines may be calibrated by one of the three following methods or combination thereof: 1.1.1 Use of standard weights and lever arms. 1.1.2 Use of elastic torque measuring devices. 1.1.3 Use of elastic force measuring devices and lever arms. 1.1.4 Any of the methods require a specific uncertainty of measurement and a traceability derived from national standards of mass and length. 1.2 The procedures of 1.1.1, 1.1.2, and 1.1.3 apply to the calibration of the torque-indicating systems associated with the testing machine, such as a scale, dial, marked or unmarked recorder chart, digital display, etc. In all cases the buyer/owner/user must designate the torque-indicating system(s) to be calibrated and included in the repor...

  10. Biaxial testing for fabrics and foils optimizing devices and procedures

    CERN Document Server

    Beccarelli, Paolo

    2015-01-01

    This book offers a well-structured, critical review of current design practice for tensioned membrane structures, including a detailed analysis of the experimental data required and critical issues relating to the lack of a set of design codes and testing procedures. The technical requirements for biaxial testing equipment are analyzed in detail, and aspects that need to be considered when developing biaxial testing procedures are emphasized. The analysis is supported by the results of a round-robin exercise comparing biaxial testing machines that involved four of the main research laboratories in the field. The biaxial testing devices and procedures presently used in Europe are extensively discussed, and information is provided on the design and implementation of a biaxial testing rig for architectural fabrics at Politecnico di Milano, which represents a benchmark in the field. The significance of the most recent developments in biaxial testing is also explored.

  11. A Novel Image-Guided, Automatic, High-Intensity Neurostimulation Device for the Treatment of Nonspecific Low Back Pain

    Directory of Open Access Journals (Sweden)

    Miguel Gorenberg

    2011-01-01

    Full Text Available Purpose. The current pilot study investigates the effectiveness of a novel device in the management of chronic low back pain (LBP. This device is able to automatically measure skin impedance in a selected body area and, immediately afterwards, to stimulate multiple points that are targeted according to differentiation in their electrical properties (peripheral nerve ends—milinated A δ fibers with high-intensity electrical stimulation. Materials and Methods. Nineteen outpatients were included in the study, 15 females (79% and 4 men (21%, mean age 52.1±10.8 years, all diagnosed with nonspecific chronic LBP. The protocol consisted of 6 treatment sessions, 2–4 days apart. Each session included a <1 minute automatic impedance screening, followed by a 20-minute treatment of lowest impedance points according to proprietary algorithms. Outcome Measures. The primary outcome measure consisted of changes in pain intensity as measured on a 100 mm pain visual analogue scale (VAS obtained at enrollment, before and 2 hours after each treatment. Secondary outcome measures were the Oswestry Disability Index (ODI and lumbar flexion range of motion (ROM obtained at baseline and each week during treatment. Results. The mean±SD baseline VAS score for all participants was 61±14. There were no significant changes in VAS scores between enrollment and before the first treatment (55±16; P=.102. During treatment, VAS scores decreased significantly compared with baseline scores by 39±17 mm (P<.001. Notably, VAS scores of all the patients, except for one, decreased by more than 20 mm after the fourth treatment, thus showing marked improvement in 95% of enrolled patients. ODI decreased throughout the entire treatment period, with significant changes from baseline already at the first week (P=.001. Lumbar flexion ROM showed a mean increase of 2.1 cm during treatment, but was not statistically significant. Conclusion. The results of the current pilot study

  12. Automatic Testing of the Trigger Data Serializer ASIC for the Upgrade of the ATLAS Muon Spectrometer

    CERN Document Server

    Pinkham, Reid; Schwarz, Thomas

    The Trigger Data Serializer (TDS) is a custom designed Application Specific Integrated Circuit (ASIC) designed at the University of Michigan to be used on the ATLAS New Small Wheel (NSW) detector. The TDS is a central hub of the NSW trigger system. It prepares the trigger data for both pad and strip detectors, performs pad-strip matching, and serializes the matched strip data to other circuits on the rim of the NSW. In total, 6000 TDS chips will be produced. As part of the TDS’ initial production run, a test platform was developed to verify the functionality of each chip before being sent to users. The test platform consisted of multiple FPGA evaluation boards with custom designed mezzanine boards to hold the TDS chip during testing and control software running on a local computer. Of the initial run of 200 chips, 161 chips were tested with the automatic setup of which 158 passed. Detailed description of the TDS and automatic test fixture can be found in this thesis.

  13. Out-of-Bounds Array Access Fault Model and Automatic Testing Method Study

    Institute of Scientific and Technical Information of China (English)

    GAO Chuanping; DUAN Miyi; TAN Liqun; GONG Yunzhan

    2007-01-01

    Out-of-bounds array access(OOB) is one of the fault models commonly employed in the objectoriented programming language. At present, the technology of code insertion and optimization is widely used in the world to detect and fix this kind of fault. Although this method can examine some of the faults in OOB programs, it cannot test programs thoroughly, neither to find the faults correctly. The way of code insertion makes the test procedures so inefficient that the test becomes costly and time-consuming. This paper, uses a kind of special static test technology to realize the fault detection in OOB programs. We first establish the fault models in OOB program, and then develop an automatic test tool to detect the faults. Some experiments have exercised and the results show that the method proposed in the paper is efficient and feasible in practical applications.

  14. Analytical evaluation of five oral fluid drug testing devices

    OpenAIRE

    Isalberti, Cristina; Van Stechelman, Sylvie; Legrand, Sara-Ann; Van der Linden, Gertrude; Verstraete, Alain

    2010-01-01

    Introduction: The correlation with blood drug presence and the easiness of sample collection make oral fluid an ideal matrix for roadside drug tests targeting impaired drivers. Aim: To evaluate the reliability of five oral fluid testing devices: Varian OraLab®6, Dräger DrugTest® 5000, Cozart® DDS 806, Mavand RapidSTAT® and Innovacon OrAlert. Method: More than 760 samples were collected from volunteers either at drug addiction treatment centres or during roadside sessions. Target drug ...

  15. Device for automatic driving of an mining combine in relation to the open interface of 2 solid media

    Energy Technology Data Exchange (ETDEWEB)

    Zombek, O.I.; Nosulya, Ye.P.; Pavlov, Yu.S.; Shcherbina, V.I.

    1982-01-01

    A device is proposed for automatic driving of a mining combine in relation to the open interface of 2 solid media which include electric hydraulic distributors of lifting and lowering the actuating mechanism, electrodes with mechanism for their compression and hydraulic engine of the caterpillar course. In order to improve accuracy by guaranteeing the possibility of pressing the electrodes to the wall in the shaft with constant force, the mechanism of compression of the electrode is made in the form of 2 hydraulic winches whose piston cavities are interconnected and are connected through the valve of sequence input of the hydraulic motor of the caterpillar course. The interconnected rod cavities of the hydraulic winches are connected to the outlet of the hydraulic motor of the caterpillar course, while the electrodes are installed on the ends of the hydraulic winch rods. The electrical outlets of the electrodes are connected through the contacts of the corresponding relay to the electric hydraulic distributors of lifting and lowering the actuating mechanism. In order to guarantee the necessary accuracy of installing the electrodes on the interface of the 2 solid media, the hydraulic winches are movable over the height in relation to each other. Use of the proposed device in the national economy makes it possible to reduce the loss of minerals which appears because of deviation of the combine into the side rock; to replace the not very effective manual labor of the personnel servicing the mining combine for making shafts in a vertical plane; to increase the content of mineral, sylvinite by reducing the working out of the mineral. In addition to the obtained additional quantity of mineral by increasing the rates of drilling, the proposed device makes it possible to reduce outlays for enrichment.

  16. Performance of an implantable automatic atrial fibrillation detection device: impact of software adjustments and relevance of manual episode analysis.

    Science.gov (United States)

    Eitel, Charlotte; Husser, Daniela; Hindricks, Gerhard; Frühauf, Manuela; Hilbert, Sebastian; Arya, Arash; Gaspar, Thomas; Wetzel, Ulrike; Bollmann, Andreas; Piorkowski, Christopher

    2011-04-01

    Implantable loop recorders (ILRs) with specific atrial fibrillation (AF) detection algorithms (ILR-AF) have been developed for continuous AF monitoring. We sought to analyse the clinical value of a new AF monitoring device and to compare it to serial 7-day Holter. Sixty-four consecutive patients suffering from paroxysmal AF were included in this prospective analysis and received an ILR-AF. Manual electrogram analysis was performed for each automatically detected episode and each was categorized into one of three possible diagnoses: 'no AF', 'definite AF', and 'possible AF' (non-diagnostic). Analysis was performed separately before and after a software upgrade that was introduced during the course of the study. A subgroup of patients (51 of 64) underwent AF catheter ablation with subsequent serial 7-day Holter in comparison with the ILR-AF. A total of 333 interrogations were performed (203 before and 130 after software upgrade). The number of patients with AF misdetection was significantly reduced from 72 to 44% following the software upgrade (P = 0.001). The number of patients with non-diagnostic interrogations went from 38 to 16% (P = 0.001). Compared with serial 7-day Holter, the ILR-AF had a tendency to detect a higher number of patients with AF recurrences (31 vs. 24%; P = 0.125). The rate of AF detection on ILR-AF may be higher compared with standard AF monitoring. However, false-positive AF recordings hamper the clinical value. Developments in device technology and device handling are necessary to minimize non-diagnostic interrogations.

  17. Target and peripheral dose during patient repositioning with the Gamma Knife automatic positioning system (APS) device.

    Science.gov (United States)

    Tran, Tuan-Anh; Stanley, Thomas R; Malhotra, Harish K; De Boer, Steven F; Prasad, Dheerendra; Podgorsak, Matthew B

    2010-01-28

    The GammaPlan treatment planning system does not account for the leakage and scatter dose during APS repositioning. In this study, the dose delivered to the target site and its periphery from the defocus stage and intershot couch transit (couch motion from the focus to defocus position and back) associated with APS repositioning are measured for the Gamma Knife model 4C. A stereotactic head-frame was attached to a Leksell 16 cm diameter spherical phantom with a calibrated ion chamber at its center. Using a fiducial box, CT images of the phantom were acquired and registered in the GammaPlan treatment planning system to determine the coordinates of the target (center of the phantom). An absorbed dose of 10 Gy to the 50% isodose line was prescribed to the target site for all measurements. Plans were generated for the 8, 14 and 18 mm collimator helmets to determine the relationship of measured dose to the number of repositions of the APS system and to the helmet size. The target coordinate was identical throughout entire study and there was no movement of the APS between various shots. This allowed for measurement of intershot transit dose at the target site and its periphery. The couch was paused in the defocus position, allowing defocus dose measurements at the intracranial target and periphery. Measured dose increases with frequency of repositioning and with helmet collimator size. During couch transit, the target receives more dose than peripheral regions; however, in the defocus position, the greatest dose is superior to the target site. The automatic positioning system for the Leksell Gamma Knife model 4C results in an additional dose of up to 3.87 +/- 0.07%, 4.97 +/- 0.04%, and 5.71 +/- 0.07% to the target site; its periphery receives additional dose that varies depending on its position relative to the target. There is also dose contribution to the patient in the defocus position, where the APS repositions the patient from one treatment coordinate to another

  18. Performance testing of the automatic transmission%自动变速器的性能检验

    Institute of Scientific and Technical Information of China (English)

    张琳琳

    2013-01-01

      文章从自动变速器油的检查与更换、变速杆位置的检查与调整、自动变速器的性能试验三个方面系统分析了自动变速器的性能检验步骤与方法。%The article analyses procedure and methods of performance testing of the automatic transmission from three aspects ,the oil inspection and replacement of automatic transmission, the inspection and adjustment of lever position, the performance test of automatic transmission.

  19. Quantitative Analysis of Heavy Metals in Water Based on LIBS with an Automatic Device for Sample Preparation

    Science.gov (United States)

    Hu, Li; Zhao, Nanjing; Liu, Wenqing; Meng, Deshuo; Fang, Li; Wang, Yin; Yu, Yang; Ma, Mingjun

    2015-08-01

    Heavy metals in water can be deposited on graphite flakes, which can be used as an enrichment method for laser-induced breakdown spectroscopy (LIBS) and is studied in this paper. The graphite samples were prepared with an automatic device, which was composed of a loading and unloading module, a quantitatively adding solution module, a rapid heating and drying module and a precise rotating module. The experimental results showed that the sample preparation methods had no significant effect on sample distribution and the LIBS signal accumulated in 20 pulses was stable and repeatable. With an increasing amount of the sample solution on the graphite flake, the peak intensity at Cu I 324.75 nm accorded with the exponential function with a correlation coefficient of 0.9963 and the background intensity remained unchanged. The limit of detection (LOD) was calculated through linear fitting of the peak intensity versus the concentration. The LOD decreased rapidly with an increasing amount of sample solution until the amount exceeded 20 mL and the correlation coefficient of exponential function fitting was 0.991. The LOD of Pb, Ni, Cd, Cr and Zn after evaporating different amounts of sample solution on the graphite flakes was measured and the variation tendency of their LOD with sample solution amounts was similar to the tendency for Cu. The experimental data and conclusions could provide a reference for automatic sample preparation and heavy metal in situ detection. supported by National Natural Science Foundation of China (No. 60908018), National High Technology Research and Development Program of China (No. 2013AA065502) and Anhui Province Outstanding Youth Science Fund of China (No. 1108085J19)

  20. Automatic test pattern generation for logic circuits using the Boolean tree

    Energy Technology Data Exchange (ETDEWEB)

    Jeong Taegwon.

    1991-01-01

    The goal of this study was to develop an algorithm that can generate test patterns for combinational circuits and sequential logic circuits automatically. The new proposed algorithm generates a test pattern by using a special tree called a modified Boolean tree. In this algorithm, the construction of a modified Boolean tree is the most time-consuming step. Following the construction of a modified Boolean tree, a test pattern can be found by simply assigning a logic value 1 for even primary inputs and a logic value 0 for odd primary inputs of the constructed modified Boolean tree. The algorithm is applied to several benchmark circuits. The results showed the following: (1) for combinational circuits, the algorithm can generate test patterns 10-15% faster than the FAN algorithm, which is known as one of the most efficient algorithms to-date; (2) for sequential circuits, the algorithm shows more fault coverage than the nine valued algorithm.

  1. Device-independent parallel self-testing of two singlets

    Science.gov (United States)

    Wu, Xingyao; Bancal, Jean-Daniel; McKague, Matthew; Scarani, Valerio

    2016-06-01

    Device-independent self-testing offers the possibility of certifying the quantum state and measurements, up to local isometries, using only the statistics observed by querying uncharacterized local devices. In this paper we study parallel self-testing of two maximally entangled pairs of qubits; in particular, the local tensor product structure is not assumed but derived. We prove two criteria that achieve the desired result: a double use of the Clauser-Horne-Shimony-Holt inequality and the 3 ×3 magic square game. This demonstrate that the magic square game can only be perfectly won by measuring a two-singlet state. The tolerance to noise is well within reach of state-of-the-art experiments.

  2. CERN tests reveal security flaws with industrial network devices

    CERN Document Server

    Lüders, Stefan

    2006-01-01

    The CERN high energy particle physics facility at Geneva, Switzerland will incorporate a wide range of COTS industrial control systems within its next generation particle collider, the LHC. In particular, the Internet will be used to facilitate the remote access for accelerator and particle physicists and system experts based at several hundred locations around the globe. The integration of Industrial Ethernet and COTS PLCs within the LHC program focuses extreme attention on the industrial network cyber-security requirement. CERN's response has been to conduct operational research on the security resilience of networked industrial devices. As test team lead Stefan Lüders reports here, industrial networked devices put through the organisation's test procedures have generally shown up unexpected vulnerabilities.

  3. From Text to Test, Automatically--An Evaluation of a Computer Cloze-Test Generator.

    Science.gov (United States)

    Coniam, David

    1998-01-01

    Examines the process of developing an English-as-a-Second-Language (ESL) cloze test by computer based on a language corpus. Two such tests developed and pilot-tested in Hong Kong were found to have test items that were not as good as they would have been if designed by a competent human, but better than expected. (Author/MSE)

  4. ENDOXY - Development of a Biomimetic Oxygenator-Test-Device.

    Directory of Open Access Journals (Sweden)

    Maren Dietrich

    Full Text Available This study focusses on the development of a biomimetic oxygenator test device. Due to limited biocompatibility, current oxygenators do not allow mid- to long-term therapy. Tissue engineering uses autologous cell sources to overcome the immunogenic barriers of biomaterials. Surface coating with endothelial cells might improve hemocompatibility and thus prevent immunogenic reactions of the body. In this study this concept is applied to endothelialise a gas-permeable membrane to develop a biomimetic oxygenator test-device (ENDOXY.ENDOXY-a multifunctional test-system was developed to endothelialise a gas-permeable membrane suitable for cell culture and to test the cell retention under shear stress and to measure gas transfer through it.Successful endothelialisation of the membrane was achieved and cells showed characteristic endothelial morphologies. They stained positive for endothelial markers. The number of cells aligned with shear stress and cell retention after blood perfusing experiments was high. Gas transfer is observed via uncoated and endothelialised membranes.The study showed promising results with regard to system design, endothelialisation, and cell retention under shear stress conditions. It strongly encourages further research into the system by testing different membrane materials to design a biomimetic membrane surface and pave way for a fully hemocompatible oxygenator.

  5. Quality control test for electronic portal imaging device using QC-3 phantom with PIPSpro

    Directory of Open Access Journals (Sweden)

    Birendra Kumar Rout

    2014-12-01

    Full Text Available Purpose:A Quality control (QC test suitable for routinely daily use has been established for electronic portal imaging device (EPID using PIPSpro software version 4.4 (Standard Imaging, Middleton, WI. It provides an objective and quantitative test for tolerable image quality on the basis of the high contrast spatial resolution, the contrast-to-noise ratio (CNR and noise.Methods: The test uses a QC-3 phantom consisting of five sets of high contrast rectangular bar patterns with spatial frequeinces of 0.10, 0.20, 0.25, 0.43 and 0.75 lp/mm using 6MV and 15MV photon energy for accquiring high quality images. A “base line” value for the relative square wave modulation transfer function (RMTF, CNR and Noise data was obtained during a one week calibration period and one month test period.Results: Subsequent measurements shows significant deviations from baseline values, resulting in warning messages “potential problems in system performance”. The QC test uses high contrast spatial resolution and CNR for the system with acceptable performance. Conclusion: The method provides an automatic, objective, and sensitive measure of the system's imaging performance. This is a useful implementation during acceptance testing, commissioning, and routine quality control.

  6. Experimental device-independent tests of classical and quantum entropy

    Science.gov (United States)

    Zhu, Feng; Zhang, Wei; Chen, Sijing; You, Lixing; Wang, Zhen; Huang, Yidong

    2016-12-01

    In quantum information processing, it is important to witness the entropy of the message in the device-independent way which was proposed recently [R. Chaves, J. B. Brask, and N. Brunner, Phys. Rev. Lett. 115, 110501 (2015), 10.1103/PhysRevLett.115.110501]. In this paper, we theoretically obtain the minimal quantum entropy for three widely used linear dimension witnesses, which is considered "a difficult question." Then we experimentally test the classical and quantum entropy in a device-independent manner. The experimental results agree well with the theoretical analysis, demonstrating that entropy is needed in quantum systems that is lower than the entropy needed in classical systems with the given value of the dimension witness.

  7. Experimental device-independent tests of classical and quantum dimensions

    Science.gov (United States)

    Ahrens, Johan; Badziag, Piotr; Cabello, Adán; Bourennane, Mohamed

    2012-08-01

    A fundamental resource in any communication and computation task is the amount of information that can be transmitted and processed. The classical information encoded in a set of states is limited by the number of distinguishable states or classical dimension dc of the set. The sets used in quantum communication and information processing contain states that are neither identical nor distinguishable, and the quantum dimension dq of the set is the dimension of the Hilbert space spanned by these states. An important challenge is to assess the (classical or quantum) dimension of a set of states in a device-independent way, that is, without referring to the internal working of the device generating the states. Here we experimentally test dimension witnesses designed to efficiently determine the minimum dimension of sets of (three or four) photonic states from the correlations originated from measurements on them, and distinguish between classical and quantum sets of states.

  8. Automatic Management Systems for the Operation of the Cryogenic Test Facilities for LHC Series Superconducting Magnets

    CERN Document Server

    Tovar-Gonzalez, A; Herblin, L; Lamboy, J P; Vullierme, B

    2006-01-01

    Prior to their final preparation before installation in the tunnel, the ~1800 series superconducting magnets of the LHC machine shall be entirely tested at reception on modular test facilities. The operation 24 hours per day of the cryogenic test facilities is conducted in turn by 3-operator teams, assisted in real time by the use of the Test Bench Priorities Handling System, a process control application enforcing the optimum use of cryogenic utilities and of the "Tasks Tracking System", a web-based e-traveller application handling 12 parallel 38-task test sequences. This paper describes how such computer-based management systems can be used to optimize operation of concurrent test benches within technical boundary conditions given by the cryogenic capacity, and how they can be used to study the efficiency of the automatic steering of all individual cryogenic sub-systems. Finally, this paper presents the overall performance of the cryomagnet test station for the first complete year of operation at high produ...

  9. Tritium Systems Test Assembly: design for major device fabrication review

    Energy Technology Data Exchange (ETDEWEB)

    Anderson, J.L.; Sherman, R.H.

    1977-06-01

    This document has been prepared for the Major Device Fabrication Review for the Tritium Systems Test Assembly (TSTA). The TSTA is dedicated to the development, demonstration, and interfacing of technologies related to the deuterium-tritium fuel cycle for fusion reactor systems. The principal objectives for TSTA are: (a) demonstrate the fuel cycle for fusion reactor systems; (b) develop test and qualify equipment for tritium service in the fusion program; (c) develop and test environmental and personnel protective systems; (d) evaluate long-term reliability of components; (e) demonstrate long-term safe handling of tritium with no major releases or incidents; and (f) investigate and evaluate the response of the fuel cycle and environmental packages to normal, off-normal, and emergency situations. This document presents the current status of a conceptual design and cost estimate for TSTA. The total cost to design, construct, and operate TSTA through FY-1981 is estimated to be approximately $12.2 M.

  10. Method and device for tensile testing of cable bundles

    Science.gov (United States)

    Robertson, Lawrence M; Ardelean, Emil V; Goodding, James C; Babuska, Vit

    2012-10-16

    A standard tensile test device is improved to accurately measure the mechanical properties of stranded cables, ropes, and other composite structures wherein a witness is attached to the top and bottom mounting blocks holding the cable under test. The witness is comprised of two parts: a top and a bottom rod of similar diameter with the bottom rod having a smaller diameter stem on its upper end and the top rod having a hollow opening in its lower end into which the stem fits forming a witness joint. A small gap is present between the top rod and the larger diameter portion of the bottom rod. A standard extensometer is attached to the top and bottom rods of the witness spanning this small witness gap. When a force is applied to separate the mounting blocks, the gap in the witness expands the same length that the entire test specimen is stretched.

  11. Towards automatic recognition of irregular, short-open answers in Fill-in-the-blank tests

    Directory of Open Access Journals (Sweden)

    Sergio A. Rojas

    2014-01-01

    Full Text Available Assessment of student knowledge in Learning Management Systems such as Moodle is mostly conducted using close-ended questions (e.g. multiple-choice whose answers are straightforward to grade without human intervention. FILL-IN-THE-BLANK tests are usually more challenging since they require test-takers to recall concepts and associations not available in the statement of the question itself (no choices or hints are given. Automatic assessment of the latter currently requires the test-taker to give a verbatim answer, that is, free of spelling or typographical mistakes. In this paper, we consider an adapted version of a classical text-matching algorithm that may prevent wrong grading in automatic assessment of FILL-IN-THE-BLANK questions whenever irregular (similar but not exact answers occur due to such types of error. The technique was tested in two scenarios. In the first scenario, misspelled single-word answers to an Internet security questionnaire were correctly recognized within a two letter editing tolerance (achieving 99 % accuracy. The second scenario involved short-open answers to computer programming quizzes (i.e. small blocks of code requiring a structure that conforms to the syntactic rules of the programming language. Twenty-one real-world answers written up by students, taking a computer programming course, were assessed by the method. This assessment addressed the lack of precision in terms of programmer-style artifacts (such as unfamiliar variable or function nomenclature and uses an admissible tolerance of up to 20 % letter-level typos. These scores were satisfactory corroborated by a human expert. Additional findings and potential enhancements to the technique are also discussed.

  12. Exploring Automaticity in Text Processing: Syntactic Ambiguity as a Test Case

    Science.gov (United States)

    Rawson, Katherine A.

    2004-01-01

    A prevalent assumption in text comprehension research is that many aspects of text processing are automatic, with automaticity typically defined in terms of properties (e.g., speed and effort). The present research advocates conceptualization of automaticity in terms of underlying mechanisms and evaluates two such accounts, a…

  13. Technology and Application of the Automatic Detection in Testing Liquid Transport Properties of Textiles%织物液态水传递性能的自动检测技术及应用

    Institute of Scientific and Technical Information of China (English)

    詹永娟; 谢维斌; 姜晓云; 陈宝瑞; 虞树荣; 周小红

    2013-01-01

    Based on the vertical wicking measurement and image processing technology, this thesis introduces a kind of automatic detection device to test the liquid transport properties of textiles. According to the experiment, it shows that the deviations of the testing results obtained by the automatic detection device and the traditional test method are little, and the former method has high precision and simple operation , which can characterize the performance of water transportation through fabric well; and the automatic detection device with adjustable LED light is suitable for the automatic detection of liquid transport properties of fabrics from light-colored fabrics to deep-colored fabrics.%基于垂直芯吸法和图像处理技术,介绍了一种织物液态水传递性能的自动检测装置.并利用该装置进行了测试实验,结果表明:该自动检测装置得到的检测结果与传统检测结果偏差较小,测试精度高,操作简单方便,能较好地表征织物液态水传递特征;采用可调LED光源的织物湿传递自动检测装置适合浅色以及深色织物液态水传递性能的自动检测.

  14. Automatic testing system design and data analysis of permafrost temperature in Qinghai-Tibet Railway

    Institute of Scientific and Technical Information of China (English)

    尚迎春; 齐红元

    2008-01-01

    Aimed at the characteristics of permafrost temperature influencing the safety of Qinghai-Tibet Railway and its on-line testing system, comparing the achievement of permafrost study nationwide with those worldwide, an automatic testing system of permafrost temperature, containing a master computer and some slave computers, was designed. By choosing high-precise thermistors as temperature sensor, designing and positioning the depth and interval of testing sections, testing, keeping and sending permafrost temperature data at time over slave computers, and receiving, processing and analyzing the data of collecting permafrost temperature over master computer, the change of the permafrost temperature can be described and analyzed, which can provide information for permafrost railway engineering design. Moreover, by taking permafrost temperature testing in a certain section of Qinghai-Tibet Railway as an instance, the collected data of permafrost temperature were analyzed, and the effect of permafrost behavior was depicted under the railway, as well as, a BP model was set up to predict the permafrost characteristics. This testing system will provide information timely about the change of the permafrost to support the safety operation in Qinghai-Tibet Railway.

  15. Automatic processes in aesthetic judgment: Insights from the implicit association test

    Directory of Open Access Journals (Sweden)

    Pavlović Maša

    2012-01-01

    Full Text Available This study employed the Implicit Association Test (IAT with aim to examine the nature of automatic aesthetic judgment. The main hypothesis was that basic hedonic tone of artwork is one of important factors influencing automatic aesthetic evaluation. We conducted two experiments in which we varied hedonic valence of paintings of figural (Experiment 1 and abstract art (Experiment 2, measured participants’ implicit association between these paintings and evaluative attribute dimension via IAT and registered their explicit judgments of paintings’ hedonic tone. In both experiments we found that participants were significantly faster in those dual-categorization tasks in the IAT where preselected hedonically “positive” paintings were paired with the positive attributes and hedonically “negative” ones with the negative attributes than the other way around. We additionally found that explicit assessments of the hedonic tone were substantially related to the individual IAT effects in the case of abstract art, but not in the case of figural art. Implications of these findings are discussed. [Projekat Ministarstva nauke Republike Srbije, br. 179018 i br. 179033

  16. Static load test performance of a telescoping structure for an automatically deployable ROPS.

    Science.gov (United States)

    Etherton, J R; Cutlip, R G; Harris, J R; Ronaghi, M; Means, K H; Gillispie, A

    2002-02-01

    The automatically deployable ROPS was developed as part of an innovative project to provide passive protection against overturn fatality to operators of new tractors used in both low-clearance and unrestricted-clearance tasks. The primary objective of this phase of the research was to build a telescoping structure that would prove that a ROPS can be built that will (1) reliably deploy on signal, (2) rise in a sufficiently short amount of time, (3) firmly latch in its deployed position, and (4) satisfy SAE J2194 testing requirements. The two-post structure had previously been found to meet deployment time criteria, and design analyses indicated that neither the slip-fit joint nor the latch pins would fail at test loading. Four directions of static loading were applied to the structure to satisfy SAE requirements. For the series of static loading tests, the raised structure was found to maintain a protective clearance zone after all loads were applied. The structure is overly stiff and should be redesigned to increase its ability to absorb ground-impact energy. Results of dynamic tests and field upset tests are reported in companion articles. The next phase of development is to optimize the structure so that it will plastically deform and absorb energy that would otherwise be transferred to the tractor chassis.

  17. Engineering model of the electric drives of separation device for simulation of automatic control systems of reactive power compensation by means of serially connected capacitors

    Science.gov (United States)

    Juromskiy, V. M.

    2016-09-01

    It is developed a mathematical model for an electric drive of high-speed separation device in terms of the modeling dynamic systems Simulink, MATLAB. The model is focused on the study of the automatic control systems of the power factor (Cosφ) of an actuator by compensating the reactive component of the total power by switching a capacitor bank in series with the actuator. The model is based on the methodology of the structural modeling of dynamic processes.

  18. A routine quality assurance test for CT automatic exposure control systems.

    Science.gov (United States)

    Iball, Gareth R; Moore, Alexis C; Crawford, Elizabeth J

    2016-07-08

    The study purpose was to develop and validate a quality assurance test for CT automatic exposure control (AEC) systems based on a set of nested polymethylmethacrylate CTDI phantoms. The test phantom was created by offsetting the 16 cm head phantom within the 32 cm body annulus, thus creating a three part phantom. This was scanned at all acceptance, routine, and some nonroutine quality assurance visits over a period of 45 months, resulting in 115 separate AEC tests on scanners from four manufacturers. For each scan the longitudinal mA modulation pattern was generated and measurements of image noise were made in two annular regions of interest. The scanner displayed CTDIvol and DLP were also recorded. The impact of a range of AEC configurations on dose and image quality were assessed at acceptance testing. For systems that were tested more than once, the percentage of CTDIvol values exceeding 5%, 10%, and 15% deviation from baseline was 23.4%, 12.6%, and 8.1% respectively. Similarly, for the image noise data, deviations greater than 2%, 5%, and 10% from baseline were 26.5%, 5.9%, and 2%, respectively. The majority of CTDIvol and noise deviations greater than 15% and 5%, respectively, could be explained by incorrect phantom setup or protocol selection. Barring these results, CTDIvol deviations of greater than 15% from baseline were found in 0.9% of tests and noise deviations greater than 5% from baseline were found in 1% of tests. The phantom was shown to be sensitive to changes in AEC setup, including the use of 3D, longitudinal or rotational tube current modulation. This test methodology allows for continuing performance assessment of CT AEC systems, and we recommend that this test should become part of routine CT quality assurance programs. Tolerances of ± 15% for CTDIvol and ± 5% for image noise relative to baseline values should be used.

  19. 单片机控制自动透析器复用机的研制%The Development of an Automatic Dialyser Reuse Device by Microcomputer

    Institute of Scientific and Technical Information of China (English)

    高虹; 张志辉; 刘天亮; 沈因泰; 孟雅林; 李晓研

    2001-01-01

    介绍采用单片机控制的自动透析器复用机的工作原理,仪器构成及主要功能。比以往的透析极器复用方法更具有实用性、可靠性、操作简便、效率高的优点。%This article introduces the principles,composition and main functions of an automatic dialyser reuse device by microcomputer. It Ras more practical uses,better reliability,easier operations and greater effect than previous ones,and it's an ideal dialyser ruse device.

  20. Development and Beam Tests of an Automatic Algorithm for Alignment of LHC Collimators with Embedded BPMs

    CERN Document Server

    Valentino, G; Gasior, M; Mirarchi, D; Nosych, A A; Redaelli, S; Salvachua, B; Assmann, R W; Sammut, N

    2013-01-01

    Collimators with embedded Beam Position Monitor (BPM) buttons will be installed in the LHC during the upcoming long shutdown period. During the subsequent operation, the BPMs will allow the collimator jaws to be kept centered around the beam trajectory. In this manner, the best possible beam cleaning efficiency and machine protection can be provided at unprecedented higher beam energies and intensities. A collimator alignment algorithm is proposed to center the jaws automatically around the beam. The algorithm is based on successive approximation, as the BPM measurements are affected by non-linearities, which vary with the distance between opposite buttons, as well as the difference between the beam and the jaw centers. The successful test results, as well as some considerations for eventual operation in the LHC are also presented.

  1. Preliminary Beam Tests at REX for an Automatic Cavity Phasing Routine at HIE-ISOLDE

    CERN Document Server

    Fraser, M A; Broere, J; Lanaia, D; Valuch, D

    2013-01-01

    The HIE upgrade at ISOLDE will use 32 independently phased superconducting quarterwave cavities, which will impose new demands on the operation and set-up of the linac. The large range of different radioactive species and the broad experimental programme means that the same beam species and energy are rarely studied twice, and the accelerator must be re-tuned for each experimental run. In order to expedite machine set-up it is foreseen to calculate and set automatically the cavity phases when the operator inputs the desired beam energy and A/q of the beam species. In this note we explore our understanding of the REX rf system and test our beam dynamics calculations with two independently phased 7-gap split-ring cavities.

  2. Automatic Generation of combination of Values for Functional Testing Using Metaheuristics

    Directory of Open Access Journals (Sweden)

    Arloys Macias Rojas

    2016-11-01

    Full Text Available Several authors agree with the importance of the tests like element of quality control of the software and in the impossibility of their realization of exhaustive way. This opinion defends that, the necessary quan-tity of stages and test values to achieve the maximum coverage is too big, what converts the test-case design, and in particular the generation of its values, in a combinatorial problem. That´s why, in many instances, in front of the impossibility of covering all the stages, testers leave out of the design some inter-esting values, which can discover inconsistencies with the specified requirements.This work presents a proposal for the automatic generation of values of functional test cases, by means of the use of meta-heu-ristic algorithms and maximizing the coverage of the stages. Furthermore, the algorithms implemented for the generation of initial values and for the generation of combinations are detailed. Additionally a set of good practices to use the component and the comparison of the obtained results with other existing solutions are described.

  3. Testing a satellite automatic nutation control system. [on synchronous meteorological satellite

    Science.gov (United States)

    Hrasiar, J. A.

    1974-01-01

    Testing of a particular nutation control system for the synchronous meteorological satellite (SMS) is described. The test method and principles are applicable to nutation angle control for other satellites with similar requirements. During its ascent to synchronous orbit, a spacecraft like the SMS spins about its minimum-moment-of-inertia axis. An uncontrolled spacecraft in this state is unstable because torques due to fuel motion increase the nutation angle. However, the SMS is equipped with an automatic nutation control (ANC) system which will keep the nutation angle close to zero. Because correct operation of this system is critical to mission success, it was tested on an air-bearing table. The ANC system was mounted on the three-axis air-bearing table which was scaled to the SMS and equipped with appropriate sensors and thrusters. The table was spun up in an altitude chamber and nutation induced so that table motion simulated spacecraft motion. The ANC system was used to reduce the nutation angle. This dynamic test of the ANC system met all its objectives and provided confidence that the ANC system will control the SMS nutation angle.

  4. Experimental Testing for Stability Analysis of Distributed Energy Resources Components with Storage Devices and Loads

    DEFF Research Database (Denmark)

    Mihet-Popa, Lucian; Groza, Voicu; Isleifsson, Fridrik Rafn

    2012-01-01

    Experimental Testing for Stability Analysis of Distributed Energy Resources Components with Storage Devices and Loads......Experimental Testing for Stability Analysis of Distributed Energy Resources Components with Storage Devices and Loads...

  5. Automatic recognition of abnormal cells in cytological tests using multispectral imaging

    Science.gov (United States)

    Gertych, A.; Galliano, G.; Bose, S.; Farkas, D. L.

    2010-03-01

    Cervical cancer is the leading cause of gynecologic disease-related death worldwide, but is almost completely preventable with regular screening, for which cytological testing is a method of choice. Although such testing has radically lowered the death rate from cervical cancer, it is plagued by low sensitivity and inter-observer variability. Moreover, its effectiveness is still restricted because the recognition of shape and morphology of nuclei is compromised by overlapping and clumped cells. Multispectral imaging can aid enhanced morphological characterization of cytological specimens. Features including spectral intensity and texture, reflecting relevant morphological differences between normal and abnormal cells, can be derived from cytopathology images and utilized in a detection/classification scheme. Our automated processing of multispectral image cubes yields nuclear objects which are subjected to classification facilitated by a library of spectral signatures obtained from normal and abnormal cells, as marked by experts. Clumps are processed separately with reduced set of signatures. Implementation of this method yields high rate of successful detection and classification of nuclei into predefined malignant and premalignant types and correlates well with those obtained by an expert. Our multispectral approach may have an impact on the diagnostic workflow of cytological tests. Abnormal cells can be automatically highlighted and quantified, thus objectivity and performance of the reading can be improved in a way which is currently unavailable in clinical setting.

  6. Embedded Platform for Automatic Testing and Optimizing of FPGA Based Cryptographic True Random Number Generators

    Directory of Open Access Journals (Sweden)

    M. Varchola

    2009-12-01

    Full Text Available This paper deals with an evaluation platform for cryptographic True Random Number Generators (TRNGs based on the hardware implementation of statistical tests for FPGAs. It was developed in order to provide an automatic tool that helps to speed up the TRNG design process and can provide new insights on the TRNG behavior as it will be shown on a particular example in the paper. It enables to test sufficient statistical properties of various TRNG designs under various working conditions on the fly. Moreover, the tests are suitable to be embedded into cryptographic hardware products in order to recognize TRNG output of weak quality and thus increase its robustness and reliability. Tests are fully compatible with the FIPS 140 standard and are implemented by the VHDL language as an IP-Core for vendor independent FPGAs. A recent Flash based Actel Fusion FPGA was chosen for preliminary experiments. The Actel version of the tests possesses an interface to the Actel’s CoreMP7 softcore processor that is fully compatible with the industry standard ARM7TDMI. Moreover, identical tests suite was implemented to the Xilinx Virtex 2 and 5 in order to compare the performance of the proposed solution with the performance of already published one based on the same FPGAs. It was achieved 25% and 65% greater clock frequency respectively while consuming almost equal resources of the Xilinx FPGAs. On the top of it, the proposed FIPS 140 architecture is capable of processing one random bit per one clock cycle which results in 311.5 Mbps throughput for Virtex 5 FPGA.

  7. Testing the Automatization Deficit Hypothesis of Dyslexia via a Dual-Task Paradigm.

    Science.gov (United States)

    Yap, Regina L.; van der Leij, Aryan

    1994-01-01

    Fourteen Dutch children with dyslexia were compared with controls on automatic processing under a dual task (motor balance task and auditory choice task) model. Results indicated the dyslexic group was more impaired in the dual task condition than in the single task condition, compared with controls. Findings support the automatization deficit…

  8. Implementation and Test of the Automatic Flight Dynamics Operations for Geostationary Satellite Mission

    Science.gov (United States)

    Park, Sangwook; Lee, Young-Ran; Hwang, Yoola; Javier Santiago Noguero Galilea

    2009-12-01

    This paper describes the Flight Dynamics Automation (FDA) system for COMS Flight Dynamics System (FDS) and its test result in terms of the performance of the automation jobs. FDA controls the flight dynamics functions such as orbit determination, orbit prediction, event prediction, and fuel accounting. The designed FDA is independent from the specific characteristics which are defined by spacecraft manufacturer or specific satellite missions. Therefore, FDA could easily links its autonomous job control functions to any satellite mission control system with some interface modification. By adding autonomous system along with flight dynamics system, it decreases the operator’s tedious and repeated jobs but increase the usability and reliability of the system. Therefore, FDA is used to improve the completeness of whole mission control system’s quality. The FDA is applied to the real flight dynamics system of a geostationary satellite, COMS and the experimental test is performed. The experimental result shows the stability and reliability of the mission control operations through the automatic job control.

  9. Development and Application of Automatic Transfusion Alarming Device%输液自动报警器的研制与应用

    Institute of Scientific and Technical Information of China (English)

    黄美霞; 严潭

    2013-01-01

    Objective To develop an automatic device which can alarm automatically at the end of medical transfusion. Methods A floating ball was placed in Murphy's tube, and infrared emitter and receiver were put outside of the tube, with alarming circuit mobilized. The liquid level and floating ball fell down at the end of transfusion until the infrared could not be blocked, then infrared receiver receive infrared signals and the device alarmed. Resulte The device gained the advantages of high accuracy and reliability, easy operation and maintenance, and low cost. Conchision The automatic transfusion alarming device can enhance nursing efficiency and has high social & economic benefits.%目的:研制一种在输液终末时可自动报警的输液报警器.方法:在莫菲氏管内增加浮球,管外两侧设置红外发射管及接收管,外联报警线路.输液终末时液面降低,浮球下降不再遮挡红外线,红外线接收管接收红外线继而产生报警.结果:该输液报警器准确可靠,操作简单,成本低廉,维护方便.结论:该输液报警器实用性强,临床应用可明显提高护理工作效率,具有良好的社会和经济效益.

  10. Technical note: Quantifying and characterizing behavior in dairy calves using the IceTag automatic recording device

    DEFF Research Database (Denmark)

    Trénel, P.; Jensen, Margit Bak; Decker, Erik Luc

    2009-01-01

    The objectives of the current study were 1) to validate the IceTag ( http://www.icerobotics.com/ ) automatic recording device for measuring lying, standing, and moving behavior in dairy calves, and 2) to improve the information yield from this device by applying a filtering procedure allowing...... for the detection of lying versus upright. The IceTag device provides measures of intensity (I) of lying, standing, and activity measured as percent lying, percent standing, and percent active, but does not directly measure lying, standing, and moving behavior because body movements occurring while lying (e...... (LPC) was established empirically, and IceTag data were filtered according to the LPC, providing information on the posture of the animal as lying versus being upright. Third, a new threshold of I was estimated for moving activity conditional on the animal being upright. IceTag recordings from 9 calves...

  11. Screen Channel Liquid Acquisition Device Outflow Tests in Liquid Hydrogen

    Science.gov (United States)

    Hartwig, Jason W.; Chato, David J.; McQuillen, J. B.; Vera, J.; Kudlac, M. T.; Quinn, F. D.

    2013-01-01

    This paper presents experimental design and test results of the recently concluded 1-g inverted vertical outflow testing of two 325x2300 full scale liquid acquisition device (LAD) channels in liquid hydrogen (LH2). One of the channels had a perforated plate and internal cooling from a thermodynamic vent system (TVS) to enhance performance. The LADs were mounted in a tank to simulate 1-g outflow over a wide range of LH2 temperatures (20.3 - 24.2 K), pressures (100 - 350 kPa), and flow rates (0.010 - 0.055 kg/s). Results indicate that the breakdown point is dominated by liquid temperature, with a second order dependence on mass flow rate through the LAD. The best performance is always achieved in the coldest liquid states for both channels, consistent with bubble point theory. Higher flow rates cause the standard channel to break down relatively earlier than the TVS cooled channel. Both the internal TVS heat exchanger and subcooling the liquid in the propellant tank are shown to significantly improve LAD performance.

  12. Suitability and repeatability of a photostress recovery test device, the macular test device, macular degeneration TEST DEVICE, detector (MDD-2), for diabetes and diabetic retinopathy assessment

    LENUS (Irish Health Repository)

    Loughman, James

    2013-10-16

    Diabetic retinopathy can result in impaired photostress recovery time despite normal visual acuity and fundoscopic appearance. The Macular Degeneration Detector (MDD-2) is a novel flash photostress recovery time device. In this study, we examine the repeatability of the MDD-2 in normal and diabetic subjects.

  13. Flight tests of the total automatic flight control system (Tafcos) concept on a DHC-6 Twin Otter aircraft

    Science.gov (United States)

    Wehrend, W. R., Jr.; Meyer, G.

    1980-01-01

    Flight control systems capable of handling the complex operational requirements of the STOL and VTOL aircraft designs as well as designs using active control concepts are considered. Emphasis is placed on the total automatic flight control system (TACOS) (TAFCOS). Flight test results which verified the performance of the system concept are presented.

  14. Extended device profiles and testing procedures for the approval process of integrated medical devices using the IEEE 11073 communication standard.

    Science.gov (United States)

    Janß, Armin; Thorn, Johannes; Schmitz, Malte; Mildner, Alexander; Dell'Anna-Pudlik, Jasmin; Leucker, Martin; Radermacher, Klaus

    2017-08-25

    Nowadays, only closed and proprietary integrated operating room systems (IORS) from big manufacturers are available on the market. Hence, the interconnection of components from third-party vendors is only possible with increased time and costs. In the context of the German Federal Ministry of Education and Research (BMBF)-funded project OR.NET (2012-2016), the open integration of medical devices from different manufacturers was addressed. An integrated operating theater based on the open communication standard IEEE 11073 shall give clinical operators the opportunity to choose medical devices independently of the manufacturer. This approach would be advantageous especially for hospital operators and small- and medium-sized enterprises (SME) of medical devices. Actual standards and concepts regarding technical feasibility and the approval process do not cope with the requirements for a modular integration of medical devices in the operating room (OR), based on an open communication standard. Therefore, innovative approval strategies and corresponding certification and test procedures, which cover actual legal and normative standards, have to be developed in order to support the future risk management and the usability engineering process of open integrated medical devices in the OR. The use of standardized device and service profiles and a three-step testing procedure, including conformity, interoperability and integration tests are described in this paper and shall support the manufacturers to integrate their medical devices without disclosing the medical devices' risk analysis and related confidential expertise or proprietary information.

  15. Anomalous Thrust Production from an RF Test Device Measured on a Low-Thrust Torsion Pendulum

    Science.gov (United States)

    Brady, David; White, Harold G.; March, Paul; Lawrence, James T.; Davies, Frank J.

    2014-01-01

    produce thrust. Specifically, one test article contained internal physical modifications that were designed to produce thrust, while the other did not (with the latter being referred to as the "null" test article). Test data gathered includes torsion pendulum displacement measurements which are used to calculate generated force, still imagery in the visible spectrum to document the physical configuration, still imagery in the infrared spectrum to characterize the thermal environment, and video imagery. Post-test data includes static and animated graphics produced during RF resonant cavity characterization using the COMSOL Multiphysics® software application. Excerpts from all of the above are included and discussed in this paper. Lessons learned from test integration and operations include identification of the need to replace manual control of the resonant cavity target frequency with an automated frequency control capability. Future test plans include the development of an automatic frequency control circuit. Test results indicate that the RF resonant cavity thruster design, which is unique as an electric propulsion device, is producing a force that is not attributable to any classical electromagnetic phenomenon and therefore is potentially demonstrating an interaction with the quantum vacuum virtual plasma. Future test plans include independent verification and validation at other test facilities.

  16. Research on automatic non-destructive testing system of oil coiled tubing

    Science.gov (United States)

    Guo, Rong; Qiu, Wenbin; Wang, Yuhui; Ren, Jianguang

    2010-10-01

    A method using ultrasonic devices for on-line measurement of oil coiled tubing was proposed. The principle of ultrasonic testing was analyzed. Then, the structure of the system consisting of mechanical system, coupling system, measuring system, control system and system software was determinated. Based on the analysis of technology requirement, measuring technique in which the coiled tubing did not rotate and the probe was static was chosen. The ultrasonic testing probes were triggered in turn. After signal sampling, digital filtering and A / D conversion signal processing, the received echo signals were sent to computer. Through analyzing and accounting, the test results were obtained. Based on VC++.net, A-type ultrasonic and C-type ultrasonic display software and the inspection data processing software were developed. Using Windows programming technology, the software structure and function library were totally open. Therefore, secondary development can be carried out conveniently. Based on the experimental studies, coiled tubing's ultrasonic testing system is developed. The testing results show that the system has specific advantages such as high-adaptation, highefficiency, high- stability, high reliability and can meet the need of the users. The ultrasonic testing technologies proposed in this paper can be applied extensively to other tubes.

  17. [Development of an automatic vacuum liquid chromatographic device and its application in the separation of the components from Schisandra chinensis (Turz) Baill].

    Science.gov (United States)

    Zhu, Jingbo; Liu, Baoyue; Shan, Shibo; Ding, Yanl; Kou, Zinong; Xiao, Wei

    2015-08-01

    In order to meet the needs of efficient purification of products from natural resources, this paper developed an automatic vacuum liquid chromatographic device (AUTO-VLC) and applied it to the component separation of petroleum ether extracts of Schisandra chinensis (Turcz) Baill. The device was comprised of a solvent system, a 10-position distribution valve, a 3-position changes valve, dynamic axis compress chromatographic columns with three diameters, and a 10-position fraction valve. The programmable logic controller (PLC) S7- 200 was adopted to realize the automatic control and monitoring of the mobile phase changing, column selection, separation time setting and fraction collection. The separation results showed that six fractions (S1-S6) of different chemical components from 100 g Schisandra chinensis (Turcz) Baill. petroleum ether phase were obtained by the AUTO-VLC with 150 mm diameter dynamic axis compress chromatographic column. A new method used for the VLC separation parameters screened by using multiple development TLC was developed and confirmed. The initial mobile phase of AUTO-VLC was selected by taking Rf of all the target compounds ranging from 0 to 0.45 for fist development on the TLC; gradient elution ratio was selected according to k value (the slope of the linear function of Rf value and development times on the TLC) and the resolution of target compounds; elution times (n) were calculated by the formula n ≈ ΔRf/k. A total of four compounds with the purity more than 85% and 13 other components were separated from S5 under the selected conditions for only 17 h. Therefore, the development of the automatic VLC and its method are significant to the automatic and systematic separation of traditional Chinese medicines.

  18. Testing limits to airflow perturbation device (APD measurements

    Directory of Open Access Journals (Sweden)

    Jamshidi Shaya

    2008-10-01

    Full Text Available Abstract Background The Airflow Perturbation Device (APD is a lightweight, portable device that can be used to measure total respiratory resistance as well as inhalation and exhalation resistances. There is a need to determine limits to the accuracy of APD measurements for different conditions likely to occur: leaks around the mouthpiece, use of an oronasal mask, and the addition of resistance in the respiratory system. Also, there is a need for resistance measurements in patients who are ventilated. Method Ten subjects between the ages of 18 and 35 were tested for each station in the experiment. The first station involved testing the effects of leaks of known sizes on APD measurements. The second station tested the use of an oronasal mask used in conjunction with the APD during nose and mouth breathing. The third station tested the effects of two different resistances added in series with the APD mouthpiece. The fourth station tested the usage of a flexible ventilator tube in conjunction with the APD. Results All leaks reduced APD resistance measurement values. Leaks represented by two 3.2 mm diameter tubes reduced measured resistance by about 10% (4.2 cmH2O·sec/L for control and 3.9 cm H2O·sec/L for the leak. This was not statistically significant. Larger leaks given by 4.8 and 6.4 mm tubes reduced measurements significantly (3.4 and 3.0 cm cmH2O·sec/L, respectively. Mouth resistance measured with a cardboard mouthpiece gave an APD measurement of 4.2 cm H2O·sec/L and mouth resistance measured with an oronasal mask was 4.5 cm H2O·sec/L; the two were not significantly different. Nose resistance measured with the oronasal mask was 7.6 cm H2O·sec/L. Adding airflow resistances of 1.12 and 2.10 cm H2O·sec/L to the breathing circuit between the mouth and APD yielded respiratory resistance values higher than the control by 0.7 and 2.0 cm H2O·sec/L. Although breathing through a 52 cm length of flexible ventilator tubing reduced the APD

  19. Small UAV Automatic Ground Collision Avoidance System Design Considerations and Flight Test Results

    Science.gov (United States)

    Sorokowski, Paul; Skoog, Mark; Burrows, Scott; Thomas, SaraKatie

    2015-01-01

    The National Aeronautics and Space Administration (NASA) Armstrong Flight Research Center Small Unmanned Aerial Vehicle (SUAV) Automatic Ground Collision Avoidance System (Auto GCAS) project demonstrated several important collision avoidance technologies. First, the SUAV Auto GCAS design included capabilities to take advantage of terrain avoidance maneuvers flying turns to either side as well as straight over terrain. Second, the design also included innovative digital elevation model (DEM) scanning methods. The combination of multi-trajectory options and new scanning methods demonstrated the ability to reduce the nuisance potential of the SUAV while maintaining robust terrain avoidance. Third, the Auto GCAS algorithms were hosted on the processor inside a smartphone, providing a lightweight hardware configuration for use in either the ground control station or on board the test aircraft. Finally, compression of DEM data for the entire Earth and successful hosting of that data on the smartphone was demonstrated. The SUAV Auto GCAS project demonstrated that together these methods and technologies have the potential to dramatically reduce the number of controlled flight into terrain mishaps across a wide range of aviation platforms with similar capabilities including UAVs, general aviation aircraft, helicopters, and model aircraft.

  20. DEFINING THE MAGNETIC FIELD FOR THE ELEMENTS OF AIR MOTORS AND DEVICES FOR AUTOMATIC TAKE-OFF OF THE MILKING MACHINE

    Directory of Open Access Journals (Sweden)

    Koledov R. V.

    2015-04-01

    Full Text Available Efficient dairy cattle breeding are largely dependent from technology content and service animals. Most farms use a tethered way content. With this method of milking, the technology requires the introduction of new techniques to increase productivity on the farm and cost reduction of dairy products. The most rational is improving the design of existing milking machines. Regarded device for automatic removal of hanging part of a milking machine, its structure and working principle. The main unit of the device is a pneumatic motor that operates from the vacuum system of the milking plant. In the housing mounted on the shaft of the pneumatic motor rotor with curved vanes, there are magnetic elements. These elements should have the necessary geometrical and force parameters to ensure the normal operation of the device for automatic removal of hanging part of milking machine. The article describes a laboratory research and an analysis of the magnetic elements. In laboratory studies, we have revealed a dependence of the traction capacity of pneumatic motor from linear and power parameters of the magnetic elements, as well as established necessary geometric parameters and the magnetic field strength of the elements for normal operation

  1. Chalcogenide Glass Radiation Sensor; Materials Development, Design and Device Testing

    Energy Technology Data Exchange (ETDEWEB)

    Mitkova, Maria; Butt, Darryl; Kozicki, Michael; Barnaby, Hugo

    2013-04-30

    studied the effect of x-rays and γ-rays, on thin film chalcogenide glasses and applied them in conjunction with film incorporating a silver source in a new type of radiation sensor for which we have an US patent application [3]. In this report, we give data about our studies regarding our designed radiation sensor along with the testing and performance at various radiation doses. These studies have been preceded by materials characterization research related to the compositional and structural characteristics of the active materials used in the radiation sensor design. During the work on the project, we collected a large volume of material since every experiment was repeated many times to verify the results. We conducted a comprehensive material research, analysis and discussion with the aim to understand the nature of the occurring effects, design different structures to harness these effects, generated models to aid in the understanding the effects, built different device structures and collected data to quantify device performance. These various aspects of our investigation have been detailed in previous quarterly reports. In this report, we present our main results and emphasize on the results pertaining to the core project goals materials development, sensor design and testing and with an emphasis on classifying the appropriate material and design for the optimal application. The report has three main parts: (i) Presentation of the main data; (ii) Bulleted summary of the most important results; (iii) List of the patent, journal publications, conference proceedings and conferences participation, occurring as a result of working on the project.

  2. TESTING NEW TYPES OF ROLLING STOCK FOR ELECTROMAGNETIC COMPATIBILITY WITH SIGNALING AND COMMUNICATION DEVICES

    Directory of Open Access Journals (Sweden)

    V. I. Havrilyuk

    2015-09-01

    Full Text Available Purpose. In the paper there is the comparative analysis of standards and methods of measurements of electromagnetic interference, those are caused by electrical equipment of new types of rolling stock with AC and DC-current electric traction in accordance with the normative documents are adopted in Ukraine and the EU. The development on this basis the measuring method of current interference in traction network, generated by the electrical equipment of electric rolling stock (ERS applicable to testing the new types of rolling stock for electromagnetic compatibility (EMC with different systems of railway signaling is also needed. Methodology. The testing method has been offered. It includes measurements in power circuits of rolling stock, as well as in track devices of signalization systems. Findings. Norms and methods tests of a rolling stock on electromagnetic compatibility with track circuits (TC were analyzed. It was found that a large variety of electricity supply systems, signalization and link in Europe makes it necessary to test new types of electric rolling stock for electromagnetic compatibility with pick up unit in each country separately, taking into account the features used in its systems. It is greatly increases the cost of introducing new types of rolling stock. The test method of electric rolling stock EMC with track circuits has been developed; it includes measurement in power circuits of rolling stock, as well as in track devices of signalization systems. Measurements in accordance with the proposed methodology for electric rolling stock with asynchronous traction drive when driving on sections electrified at AC and DC have been carried out. The values of the interference current in track circuit to all the frequencies of the signal current have been defined. It is shown that under some modes of the train the interference current exceed the permissible values. Originality. The method for measuring interference current generated

  3. Underwater Sound Levels at a Wave Energy Device Testing Facility in Falmouth Bay, UK.

    Science.gov (United States)

    Garrett, Joanne K; Witt, Matthew J; Johanning, Lars

    2016-01-01

    Passive acoustic monitoring devices were deployed at FaBTest in Falmouth Bay, UK, a marine renewable energy device testing facility during trials of a wave energy device. The area supports considerable commercial shipping and recreational boating along with diverse marine fauna. Noise monitoring occurred during (1) a baseline period, (2) installation activity, (3) the device in situ with inactive power status, and (4) the device in situ with active power status. This paper discusses the preliminary findings of the sound recording at FabTest during these different activity periods of a wave energy device trial.

  4. Device for automatic topping up of distilled water in the cells of a battery. Vorrichtung zum automatischen Nachfuellen von destilliertem Wasser in den Zellen eines Akkumulators

    Energy Technology Data Exchange (ETDEWEB)

    Bothe, F.W.; Krause, E.

    1983-12-15

    In a device for the automatic topping up of distilled water in the cells of a battery with a closing stopper for the cells, to which water is supplied via a first hose system, from which water is sucked via a second hose system, and which top up the cell with the distilled water supplied according to the electrolyte level in the cell, the system is not liable to have faults because mechanical parts are avoided and a high filling rate is achieved by the stopper having a container for the incoming water, whose level can be kept constant by the suction system effective above the required level.

  5. Automatic treatment of flight test images using modern tools: SAAB and Aeritalia joint approach

    Science.gov (United States)

    Kaelldahl, A.; Duranti, P.

    The use of onboard cine cameras, as well as that of on ground cinetheodolites, is very popular in flight tests. The high resolution of film and the high frame rate of cinecameras are still not exceeded by video technology. Video technology can successfully enter the flight test scenario once the availability of solid-state optical sensors dramatically reduces the dimensions, and weight of TV cameras, thus allowing to locate them in positions compatible with space or operational limitations (e.g., HUD cameras). A proper combination of cine and video cameras is the typical solution for a complex flight test program. The output of such devices is very helpful in many flight areas. Several sucessful applications of this technology are summarized. Analysis of the large amount of data produced (frames of images) requires a very long time. The analysis is normally carried out manually. In order to improve the situation, in the last few years, several flight test centers have devoted their attention to possible techniques which allow for quicker and more effective image treatment.

  6. Automatic method for synchronizing workpiece frames in twin-robot nondestructive testing system

    Science.gov (United States)

    Lu, Zongxing; Xu, Chunguang; Pan, Qinxue; Meng, Fanwu; Li, Xinliang

    2015-07-01

    The workpiece frames relative to each robot base frame should be known in advance for the proper operation of twin-robot nondestructive testing system. However, when two robots are separated from the workpieces, the twin robots cannot reach the same point to complete the process of workpiece frame positioning. Thus, a new method is proposed to solve the problem of coincidence between workpiece frames. Transformation between two robot base frames is initiated by measuring the coordinate values of three non-collinear calibration points. The relationship between the workpiece frame and that of the slave robot base frame is then determined according to the known transformation of two robot base frames, as well as the relationship between the workpiece frame and that of the master robot base frame. Only one robot is required to actually measure the coordinate values of the calibration points on the workpiece. This requirement is beneficial when one of the robots cannot reach and measure the calibration points. The coordinate values of the calibration points are derived by driving the robot hand to the points and recording the values of top center point(TCP) coordinates. The translation and rotation matrices relate either the two robot base frames or the workpiece and master robot. The coordinated are solved using the measured values of the calibration points according to the Cartesian transformation principle. An optimal method is developed based on exponential mapping of Lie algebra to ensure that the rotation matrix is orthogonal. Experimental results show that this method involves fewer steps, offers significant advantages in terms of operation and time-saving. A method used to synchronize workpiece frames in twin-robot system automatically is presented.

  7. Automatic Method for Synchronizing Workpiece Frames in Twin-robot Nondestructive Testing System

    Institute of Scientific and Technical Information of China (English)

    LU Zongxing; XU Chunguang; PAN Qinxue; MENG Fanwu; LI Xinliang

    2015-01-01

    The workpiece frames relative to each robot base frame should be known in advance for the proper operation of twin-robot nondestructive testing system. However, when two robots are separated from the workpieces, the twin robots cannot reach the same point to complete the process of workpiece frame positioning. Thus, a new method is proposed to solve the problem of coincidence between workpiece frames. Transformation between two robot base frames is initiated by measuring the coordinate values of three non-collinear calibration points. The relationship between the workpiece frame and that of the slave robot base frame is then determined according to the known transformation of two robot base frames, as well as the relationship between the workpiece frame and that of the master robot base frame. Only one robot is required to actually measure the coordinate values of the calibration points on the workpiece. This requirement is beneficial when one of the robots cannot reach and measure the calibration points. The coordinate values of the calibration points are derived by driving the robot hand to the points and recording the values of top center point(TCP) coordinates. The translation and rotation matrices relate either the two robot base frames or the workpiece and master robot. The coordinated are solved using the measured values of the calibration points according to the Cartesian transformation principle. An optimal method is developed based on exponential mapping of Lie algebra to ensure that the rotation matrix is orthogonal. Experimental results show that this method involves fewer steps, offers significant advantages in terms of operation and time-saving. A method used to synchronize workpiece frames in twin-robot system automatically is presented.

  8. Development and Testing of a Decision Making Based Method to Adjust Automatically the Harrowing Intensity

    Directory of Open Access Journals (Sweden)

    Roland Gerhards

    2013-05-01

    Full Text Available Harrowing is often used to reduce weed competition, generally using a constant intensity across a whole field. The efficacy of weed harrowing in wheat and barley can be optimized, if site-specific conditions of soil, weed infestation and crop growth stage are taken into account. This study aimed to develop and test an algorithm to automatically adjust the harrowing intensity by varying the tine angle and number of passes. The field variability of crop leaf cover, weed density and soil density was acquired with geo-referenced sensors to investigate the harrowing selectivity and crop recovery. Crop leaf cover and weed density were assessed using bispectral cameras through differential images analysis. The draught force of the soil opposite to the direction of travel was measured with electronic load cell sensor connected to a rigid tine mounted in front of the harrow. Optimal harrowing intensity levels were derived in previously implemented experiments, based on the weed control efficacy and yield gain. The assessments of crop leaf cover, weed density and soil density were combined via rules with the aforementioned optimal intensities, in a linguistic fuzzy inference system (LFIS. The system was evaluated in two field experiments that compared constant intensities with variable intensities inferred by the system. A higher weed density reduction could be achieved when the harrowing intensity was not kept constant along the cultivated plot. Varying the intensity tended to reduce the crop leaf cover, though slightly improving crop yield. A real-time intensity adjustment with this system is achievable, if the cameras are attached in the front and at the rear or sides of the harrow.

  9. The current situation and development of medical device testing institutes in China.

    Science.gov (United States)

    Yang, Xiaofang; Mu, Ruihong; Fan, Yubo; Wang, Chunren; Li, Deyu

    2017-04-01

    This article analyses the current situation and development of Chinese medical device testing institutes from the perspectives of the two most important functions - testing functions and medical device standardization functions. Areas Covered: The objective of the Chinese government regulations for medical device industry is to ensure the safety and effectiveness of medical devices for Chinese patients. To support the regulation system, the Chinese government has established medical device testing institutes at different levels for example, the national, provincial, and municipal levels. These testing institutes also play an important role in technical support during medical device premarket registration and post market surveillance, they are also the vital practitioners of Chinese medical device standardization. Expert Commentary: Chinese medical device testing institutes are technical departments established by government, and serve the regulatory functions of government agency. In recent years, with the rapid development of medical device industry as well as constantly increasing international and domestic medical device market, the importance of medical device testing institute is more prominent, However, there are still some problems unsolved, such as their overall capacity remains to be improved, construction of standardization is to be strengthened, etc.

  10. MEMS device for bending test: measurements of fatigue and creep of electroplated nickel

    DEFF Research Database (Denmark)

    Larsen, Kristian Pontoppidan; Rasmussen, Anette Alsted; Ravnkilde, Jan Tue;

    2003-01-01

    In situ bending test devices with integrated electrostatic actuator were fabricated in electroplated nanocrystalline nickel. The device features approximately pure in-plane bending of the test beam. The excitation of the test beam has fixed displacement amplitude as the actuation electrodes are o...

  11. A novel automatic regulatory device for continuous bladder irrigation based on wireless sensor in patients after transurethral resection of the prostate: A prospective investigation.

    Science.gov (United States)

    Ding, Aimin; Cao, Huling; Wang, Lihua; Chen, Jiangang; Wang, Jian; He, Bosheng

    2016-12-01

    Benign prostatic hyperplasia is a common progressive disease in aging men, which leads to a significant impact on daily lives of patients. Continuous bladder irrigation (CBI) is a supplementary option for preventing the adverse events following transurethral resection of the prostate (TURP). Regulation of the flow rate based on the color of drainage bag is significant to prevent the clot formation and retention, which is controlled manually at present. To achieve a better control of flow rate and reduce inappropriate flow rate-related adverse effects, we designed an automatic flow rate controller for CBI applied with wireless sensor and evaluated its clinical efficacy. The therapeutic efficacy was evaluated in patients receiving the novel automatic bladder irrigation post-TURP in the experimental group compared with controls receiving traditional bladder irrigation in the control group. A total of 146 patients were randomly divided into 2 groups-the experimental group (n = 76) and the control group (n = 70). The mean irrigation volume of the experimental group (24.2 ± 3.8 L) was significantly lower than that of the controls (54.6 ± 5.4 L) (P irrigation device had significantly decreased incidence of clot retention (8/76) and cystospasm (12/76) compared to controls (21/70; 39/70, P irrigation time (28.6 ± 2.7 vs 29.5 ± 3.4 hours, P = 0.077). The study suggests that the automatic regulating device applied with wireless sensor for CBI is safe and effective for patients after TURP. However, studies with a large population of patients and a long-term follow-up should be conducted to validate our findings.

  12. Feasibility test on green energy harvesting from physical exercise devices

    Science.gov (United States)

    Mustafi, Nirendra N.; Mourshed, M.; Masud, M. H.; Hossain, M. S.; Kamal, M. R.

    2017-06-01

    The demand of power is increasing day by day due to the increase of world population as well as the industrialization and modernization. Depletion of the world's fossil fuel reserves and the adverse effects of their uses on the environment insist the researchers to find out some means of efficient and cost effective alternative energy sources from small to large scales. In a gymnasium the human metabolism power is used to drive the physical exercise devices. However there are a number of exercise device which can have the potential to generate electricity during physical exercise. By converting the available mechanical energy from these exercise devices into kinetic energy, electric power can be produced. In this work, energy was harvested from the most commonly used physical exercise devices used in the gymnasium - paddling and chin up. The paddle pulley and the chin up pulley were connected to the couple pulley which in turn coupled to an alternator by a V-belt to produce electrical energy and a rechargeable battery was used to store electrical energy. The power generation from the device depends upon the speed at which the alternator runs and the age limit. The electrical energy output was observed 83.6 watt at 1300 rpm and 62.5 watt at1150 rpm alternator speed for the paddling and chin up respectively recorded for an average adult. The device was designed for a constant 49N load on the alternator for both paddling and chin up operation. By running each of these devices for about 12 hours in a day, any gymnasium can avoid burning of almost 23.67 kg and 31.6 kg of diesel fuel per year for chin up and paddling respectively. Also it can cut off the CO2 emission to the environment which reveals itself a standalone green micro gym.

  13. Testing interactive effects of automatic and conflict control processes during response inhibition - A system neurophysiological study.

    Science.gov (United States)

    Chmielewski, Witold X; Beste, Christian

    2017-02-01

    In everyday life successful acting often requires to inhibit automatic responses that might not be appropriate in the current situation. These response inhibition processes have been shown to become aggravated with increasing automaticity of pre-potent response tendencies. Likewise, it has been shown that inhibitory processes are complicated by a concurrent engagement in additional cognitive control processes (e.g. conflicting monitoring). Therefore, opposing processes (i.e. automaticity and cognitive control) seem to strongly impact response inhibition. However, possible interactive effects of automaticity and cognitive control for the modulation of response inhibition processes have yet not been examined. In the current study we examine this question using a novel experimental paradigm combining a Go/NoGo with a Simon task in a system neurophysiological approach combining EEG recordings with source localization analyses. The results show that response inhibition is less accurate in non-conflicting than in conflicting stimulus-response mappings. Thus it seems that conflicts and the resulting engagement in conflict monitoring processes, as reflected in the N2 amplitude, may foster response inhibition processes. This engagement in conflict monitoring processes leads to an increase in cognitive control, as reflected by an increased activity in the anterior and posterior cingulate areas, while simultaneously the automaticity of response tendencies is decreased. Most importantly, this study suggests that the quality of conflict processes in anterior cingulate areas and especially the resulting interaction of cognitive control and automaticity of pre-potent response tendencies are important factors to consider, when it comes to the modulation of response inhibition processes.

  14. LANL12-RS-108J Report on Device Modeler Testing of the Device Modeler Tool Kit. DMTK in FY14

    Energy Technology Data Exchange (ETDEWEB)

    Temple, Brian Allen [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Pimentel, David A. [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

    2014-09-28

    This document covers the various testing and modifications of the Device Modeler Tool Kit (DMTK) for project LANL12-RS-108J in FY14. The testing has been comprised of different device modelers and trainees for device modeling using DMTK on the secure network for a few test problems. Most of these problems have been synthetic data problems. There has been a local secure network training drill where one of the trainees has used DMTK for real data. DMTK has also been used on a laptop for a deployed real data training drill. Once DMTK gets into the home team, it will be used for more training drills (TDs) which will contain real data in the future.

  15. Blast Mitigation Sea Analysis - Evaluation of Lumbar Compression Data Trends in 5th Percentile Female Anthropomorphic Test Device Performance Compared to 50th Percentile Male Anthropomorphic Test Device in Drop Tower Testing

    Science.gov (United States)

    2016-08-21

    in 5th Percentile Female Anthropomorphic Test Device Performance Compared to 50th Percentile Male Anthropomorphic Test Device in Drop Tower Testing ...for advertising or product endorsement purposes. UNCLASSIFIED UNCLASSIFIED • Baseline drop tower data collected from Anthropomorphic Test Devices (ATDs...development • Testing completed with: – 5th Percentile Female ATDs and 50th Percentile Male Hybrid III ATDs – 200 g or 350 g pulse • ATD data quality

  16. 上出件冲模外翻式接盘结构设计%Design of automatic reclaiming device for upper ejector stamping die

    Institute of Scientific and Technical Information of China (English)

    杨程; 赵升吨; 章建军

    2011-01-01

    在对上出件冲模结构特点进行分析的基础上,提出了出件结构应满足的要求,在对连杆结构进行简单改进后设计了外翻式出件结构,该结构利用冲床滑块的动力自动运行,并能适应不同的模具高度.利用Pro/E对结构的运动进行了仿真,证明了外翻式出件结构的有效性.%Based on analysis of the characteristics of upper ejector stamping die, the features of reclaiming device were pointed out. A kind of automatic reclaiming device based on the connecting rod was designed. Sliding block of the press was taken as power source of the device, which can be used in different die height The motion simulation was carried out in Pro/Engineering, which shows the validity of the reclaiming device in upper ejector stamping die.

  17. Simple non-destructive tests for electroexplosive devices

    Science.gov (United States)

    Rosenthal, L. A.; Menichelli, V. J.

    1972-01-01

    Electrothermal behavior of bridgewire-explosive interface is defined by pulsing electroexplosive device with a safe level of current and examining the resistance variation of bridgewire. Bridgewire provides signal which describes average wire temperature and heat sinking to the explosive and enclosure.

  18. An Automatic Device Describe Method for Internet of Things%一种物联网设备自动描述方法

    Institute of Scientific and Technical Information of China (English)

    李勐; 王晓峰; 崔莉

    2016-01-01

    Service description file,which is fundamental for the service-oriented architecture,can be used by the IoT sensing devices to accelerate resource discovery and searching processes.Currently,these files are mostly written manually by the device developers,this process is inefficient and fallible.The state-of-art method SPITFIRE can generate the devices'de-scription in a semi-automatic way,but its configuration can be trivial and its accuracy still can be improved.In this paper,we proposed a novel automatic device description method,with which devices can automatically generate their individual descrip-tion.We designed a clustering algorithm based on DBSCAN to infer the description of sensing device,taking advantages of ex-isting descriptions and the data features of series gained by data sampling.A metric learning algorithm is also implemented to optimize the parameter used by the clustering algorithm.All the routines run independently on different devices,and no manual intervention is needed during the self-description process.Through simulation,we show that this method has a prominent ad-vantage of precision over other state-of-art methods,making our method more suitable for the massive IoT devices.%物联网感知设备的服务描述文件为海量资源的发现与检索提供了有效的支持,是面向服务的物联网架构的基础.当前服务描述文件主要通过开发人员手工撰写完成,工作量大.现有研究 SPITFIRE 提出了一种半自动方法协助开发人员撰写服务描述文件,但方法本身为集中式方法,配置较复杂且精度过度依赖人工参数调优,不适合大规模部署.针对物联网海量设备的描述问题,本文提出了一种基于度量学习的分布式的物联网感知设备自动描述方法.该方法使用设备的多种数值特征作为输入,利用一种分布式的 DBSCAN 聚类算法对设备进行归类与推导,设备通过归类结果可自动生成自身描述文

  19. Test Plan for Godiva Move from LANL TA-18 to Nevada Test Site Device Assembly Facility

    Energy Technology Data Exchange (ETDEWEB)

    Garcia, M

    2005-08-01

    Godiva is an unshielded, pulsed nuclear reactor, used to produce bursts of neutrons and gamma rays for irradiating test samples. The Godiva reactor is part of the TA-18 Facility at Los Alamos National Laboratory. The Godiva reactor is to be moved to the Device Assembly Facility (DAF) at the Nevada Test Site, northwest of Las Vegas, Nevada. Bursts of ionizing radiation from Godiva have been found to produce radio waves and electrical interference in circuits and electrical equipment (e.g., alarm systems, interlocks, recording devices) near Godiva. Safety and security concerns regarding Godiva at the DAF are: (1) Can Godiva pulses induce detonators elsewhere in the DAF to explode?, (2) What is the expected strength of the electrical signal from Godiva elsewhere in the DAF? (3) Will Godiva pulses trigger security alarms, requiring additional administrative controls? This report addresses these issues, and describes a brief set of electrical measurements intended to verify that electromagnetic emissions from Godiva are unchanged by its relocation, and below a threshold of safety for detonators that are outside the actual room Godiva resides in. The following points will be described: the nature of Godiva electrical emissions, predicted electric field at a given distance, electromagnetic frequency, safety threshold for detonators, recommended ''stay out'' zone around Godiva for detonators, and recommended measurements to be made once Godiva has been installed at DAF.

  20. Suppressing Unwanted Autobiographical Memories Reduces Their Automatic Influences: Evidence From Electrophysiology and an Implicit Autobiographical Memory Test.

    Science.gov (United States)

    Hu, Xiaoqing; Bergström, Zara M; Bodenhausen, Galen V; Rosenfeld, J Peter

    2015-07-01

    The present study investigated the extent to which people can suppress unwanted autobiographical memories in a memory-detection context involving a mock crime. Participants encoded sensorimotor-rich memories by enacting a lab-based crime (stealing a ring) and received instructions to suppress memory of the crime in order to evade guilt detection in a brain-wave-based concealed-information test. Aftereffects of suppression on automatic memory processes were measured in an autobiographical Implicit Association Test. Results showed that suppression attenuated brain-wave activity (the P300) associated with crime-relevant memory retrieval, which rendered waveforms from innocent and guilty participants indistinguishable. However, the two groups could nevertheless be discriminated via the late-posterior-negative slow wave, which may reflect the need to monitor response conflict arising between voluntary suppression and automatic recognition processes. Finally, extending recent findings that suppression can impair implicit memory processes, we provide novel evidence that suppression reduces automatic cognitive biases often associated with actual autobiographical memories. © The Author(s) 2015.

  1. Establishment of Testing Device for Shielding Performance of X and Gamma Ray Radiation Protection Materials

    Institute of Scientific and Technical Information of China (English)

    SONG; Ming-zhe; WEI; Ke-xin; HOU; Jin-bing; WANG; Hong-yu; GAO; Fei; NI; Ning

    2015-01-01

    X and gamma ray radiation protective material shielding performance testing device was built based on the international standard IEC61331.1-2014.The device can be used to test attenuation ratio,attenuation equivalent and lead equivalent of radiation protective material in"narrow beam condition","broad beam condition"and"inverse

  2. A novel implantable electromechanical ventricular assist device - First acute animal testing

    NARCIS (Netherlands)

    Kaufmann, R; Rakhorst, G; Mihaylov, D; Elstrodt, J; Nix, C; Reul, H; Rau, G

    1997-01-01

    A novel ventricular assist device (HIA-EMLVAD-AT1, Helmholtz Institute Aachen-electromechanical Left Ventricular Assist Device-Animal Test Version 1), driven by a uniformly and unidirectionally rotating actuator and a patented hypocycloidic pusherplate displacement gear unit, was developed and teste

  3. Determination of Bingham Rheological Parameters of SCC using On-line Video Image Analysis of Automatic Slump Flow Testing

    DEFF Research Database (Denmark)

    Thrane, Lars Nyholm; Pade, Claus

    2005-01-01

    A “touch one bottom” prototype system for estimation of Bingham rheological parameters of SCC has been developed. Video image analysis is used to obtain a series of corresponding values of concrete spread versus time during an automatic slump flow test. The spread versus time curve is subsequentl...... used to estimate the Bingham rheological parameters by a least square search into a database. It takes less than 120 seconds from the start of the slump flow test to the SCC’s Bingham rheological parameters appear on the system’s PC....

  4. Testing an innovative device against airborne Aspergillus contamination.

    Science.gov (United States)

    Desoubeaux, Guillaume; Bernard, Marie-Charlotte; Gros, Valérie; Sarradin, Pierre; Perrodeau, Elodie; Vecellio, Laurent; Piscopo, Antoine; Chandenier, Jacques; Bernard, Louis

    2014-08-01

    Aspergillus fumigatus is a major airborne nosocomial pathogen that is responsible for severe mycosis in immunocompromised patients. We studied the efficacy of an innovative mobile air-treatment device in eliminating A. fumigatus from the air following experimental massive contamination in a high-security room. Viable mycological particles were isolated from sequential air samples in order to evaluate the device's effectiveness in removing the fungus. The concentration of airborne conidia was reduced by 95% in 18 min. Contamination was reduced below the detection threshold in 29 min, even when the machine was at the lowest airflow setting. In contrast, during spontaneous settling with no air treatment, conidia remained airborne for more than 1 h. This indoor air contamination model provided consistent and reproducible results. Because the air purifier proved to be effective at eliminating a major contaminant, it may prove useful in preventing air-transmitted disease agents. In an experimental space mimicking a hospital room, the AirLyse air purifier, which uses a combination of germicidal ultraviolet C irradiation and titanium photocatalysis, effectively eliminated Aspergillus conidia. Such a mobile device may be useful in routine practice for lowering microbiological air contamination in the rooms of patients at risk.

  5. A Kind of Dual-axis Automatic Tracking Solar Energy Device%一种基于双轴的太阳能自动跟踪装置

    Institute of Scientific and Technical Information of China (English)

    张新亮

    2015-01-01

    为了提高太阳能电池的转换效率,设计了一种以M sp430F149单片机为核心,基于双轴的太阳能自动跟踪装置。该装置能精确跟踪太阳运动轨迹,使太阳能电池组件在晴天时始终垂直接收太阳光;在阴天时自动切换至时钟式跟踪,其转换效率高、成本低。实验结果表明,对比固定安装的太阳能电池板,在相同条件下,采用太阳能自动跟踪装置的太阳能电池板的接收率提高了约40%。%A novel automatic dual-axis tracking solar energy device with the core of Msp430F149 is designed to improve conversion efficiency of the solar panel .The solar energy device can make solar panel always vertical to the sunlight at sunny day .Otherwise , the clock model will be used .The device is of high conversion efficiency and low cost .The experiment indicates that compared with the device that the solar panel is fixed ,the new device can improve the efficiency by 40% in a day under the same condition .

  6. Coating, Degrading and Testing of Organic Polymer Devices - Reducing the route from Laboratory to Production scale devices

    DEFF Research Database (Denmark)

    Dam, Henrik Friis

    to test solar cell devices without the need of expensive multipurpose source meters. This also shows the potential for stand-alone test, especially relevant for the various outdoor test conducted around the world and for the logging of various high-impact parameters, such as temperature, humidity...... thousand cells manufactured in the process for creating a recipe that would allow a wet processed layer on layer coating to function without having penetration and dissolution through the up to 12 separately printed layers. Testing and analysis of a nanoparticle based method with water used...

  7. 一种新型多焊点滚焊装置%New Seam Welding Device for Automatic Multiple solder Join

    Institute of Scientific and Technical Information of China (English)

    黄和平

    2012-01-01

    介绍了一种新型多焊点全自动滚焊装置的结构、原理和工作过程,对其取得的效果和应用价值进行了评析.该设备结构简单,投资成本低,易实现自动化的高速精密连续点焊,证明了多焊点由单点焊改为滚焊的经济可靠性和可行性,具备一定的推广价值,并在工程上得到良好的应用.%The structure, principle and operation process of a new seam welding device for automatic multiple solder joint are Introduced mainly. Moreover, the effects and application of the device are also analyzed. The device structure is simple, the investment cost is low, and it is easy to achieve automated high-precision welding. The experiment proves that it Is eoonomy, reliable and feasible to change single spot of mutti-sold-er joins into the roll welding. The promotional value exists in the new deuice and It can be widely applied in engineering.

  8. External attentional focus enhances movement automatization: a comprehensive test of the constrained action hypothesis.

    Science.gov (United States)

    Kal, E C; van der Kamp, J; Houdijk, H

    2013-08-01

    An external focus of attention has been shown to result in superior motor performance compared to an internal focus of attention. This study investigated whether this is due to enhanced levels of movement automatization, as predicted by the constrained action hypothesis (McNevin, Shea, & Wulf, 2003). Thirty healthy participants performed a cyclic one-leg extension-flexion task with both the dominant and non-dominant leg. Focus of attention was manipulated via instructions. The degree of automatization of movement was assessed by measuring dual task costs as well as movement execution parameters (i.e., EMG activity, movement fluency, and movement regularity). Results revealed that an external focus of attention led to significantly better motor performance (i.e., shorter movement duration) than an internal focus. Although dual task costs of the motor task did not differ as a function of attentional focus, cognitive dual task costs were significantly higher when attention was directed internally. An external focus of attention resulted in more fluent and more regular movement execution than an internal focus, whereas no differences were found concerning muscular activity. These results indicate that an external focus of attention results in more automatized movements than an internal focus and, therefore, provide support for the constrained action hypothesis.

  9. Digital automatic gain control

    Science.gov (United States)

    Uzdy, Z.

    1980-01-01

    Performance analysis, used to evaluated fitness of several circuits to digital automatic gain control (AGC), indicates that digital integrator employing coherent amplitude detector (CAD) is best device suited for application. Circuit reduces gain error to half that of conventional analog AGC while making it possible to automatically modify response of receiver to match incoming signal conditions.

  10. AUTOMATIC GENERATION OF SQL TEST CASE SETS%SQL测试用例集的自动生成

    Institute of Scientific and Technical Information of China (English)

    丁祥武; 张钦; 韩朱忠

    2012-01-01

    Compiling SQL sentences is an import part for test database management system. Automatic generation of SQL sentences can effectively reduce the workload of the tester. There is almost no automatic tool supporting the direct generation of SQL sentences at present. By simulating the direct derivation process of generative formals the SQL sentences which are generated in accordance with the grammar based on SQL grammars are presented, this is used as the approach for test cases. In the paper we study on the automatic progress from BNF files which are the representation of the grammar to generating SQL test case sets. The process has several stages; Each non-terminals of SQL grammar is converted to a corresponding parse function and the set of all these parse functions forms the rules library. The generative formals of the grammar are traversed to generate SQL test cases automatically. The use of weight arrays in conjunction with stochastic numbers increases the flexibility of test cases generation. Maximum calling times of the non-terminals are employed to terminate the generation of SQL test cases. Through the tool prototype introduced, the SQL test cases in conformity with SQL grammar can be derived.%编写SQL语句是测试数据库管理系统的一个重要部分.自动生成SQL语句可以有效减少测试人员的工作量,而目前没有直接生成SQL语句的自动化工具.通过模拟产生式的直接推导过程,根据SQL文法,给出生成符合该文法的SQL语句,用作测试用例的方法;研究从表示文法的BNF文件生成SQL测试用例集合的自动化过程.这个过程包括几个阶段:将SQL文法的每一个非终结符转换成一个对应的解析函数,所有解析函数的集合构成规则库;遍历文法的产生式自动生成SQL测试用例;使用权值数组结合随机数,加大生成测试用例的灵活性;使用非终结符的最大调用次数来终止SQL测试用例的生成.通过介绍的工具原型,可以得到符合SQL语法的SQL测试用例.

  11. Adaptive system for automatic stabilization of the power factor for electric drives of separation device by means of serially connected capacitors bank

    Science.gov (United States)

    Borisevich, V. D.; Juromskiy, V. M.

    2016-09-01

    A method for designing adaptive systems for automatic extremum search to stabilize the power factor of local electric power system of electric is considered. It consists in application of the serially connected capacitors compensating the reactive component of the total electric power of in parallel connected centrifugal machines usually called as an aggregate. Operation of the system just demands measuring voltage at the output of the static frequency converter for electric drives. The proposed control system is designed to stabilize the power factor close to unity in a case of alteration of parameters of a separation cascade or a single separation device in an aggregate. Such system can be operated continuously or connected occasionally depending on a technological situation. In addition, it totally excludes the phenomenon of overcompensation.

  12. Developing an Instrumentation Package for in-Water Testing of Marine Hydrokinetic Energy Devices: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Nelson, E.

    2010-08-01

    The ocean-energy industry is still in its infancy and device developers have provided their own equipment and procedures for testing. Currently, no testing standards exist for ocean energy devices in the United States. Furthermore, as prototype devices move from the test tank to in-water testing, the logistical challenges and costs grow exponentially. Development of a common instrumentation package that can be moved from device to device is one means of reducing testing costs and providing normalized data to the industry as a whole. As a first step, the U.S. National Renewable Energy Laboratory (NREL) has initiated an effort to develop an instrumentation package to provide a tool to allow common measurements across various ocean energy devices. The effort is summarized in this paper. First, we present the current status of ocean energy devices. We then review the experiences of the wind industry in its development of the instrumentation package and discuss how they can be applied in the ocean environment. Next, the challenges that will be addressed in the development of the ocean instrumentation package are discussed. For example, the instrument package must be highly adaptable to fit a large array of devices but still conduct common measurements. Finally, some possible system configurations are outlined followed by input from the industry regarding its measurement needs, lessons learned from prior testing, and other ideas.

  13. Design of Automatic Solar Photovoltaic Power Generation Device%全自动光伏发电装置的设计

    Institute of Scientific and Technical Information of China (English)

    周天沛

    2011-01-01

    This paper introduces an automatic following system which takes DS 1302 and AT89S51 as the core. The stepper motor is controlled by using the method of the comparison of photoresistors, and by using the stepper motor to drive the biaxial mechanical tracking system to assure the solar panels vertical to the solar incident angle, thus improve the conversion efficiency of the solar energy. Everyday the device can return the initial sitting after tracking, and in the second day,it will continue track automatically to remove the accumulative error. The results show that the device generates more electricity than the fixed photovoltaic system continuously during the period of the experiment and its total power production is approximately 3.12 times of the latter. The anticipative targets is reached. It has widespread applicable potentialities.%设计了一套以DS1302和AT89S51单片机为核心的全自动跟踪光伏发电装置,采用光敏电阻比较法对步进电机进行控制,并利用步进电机驱动双轴机械驱动定位系统,使太阳能电池板始终垂直于太阳入射角,从而提高太阳能的转换效率.该装置能够在每天跟踪结束后自动回到初始位置,第二天继续自动跟踪,从而消除积累误差.实验证明,该装置在测量时段内的发电量始终明显大于固定光伏系统,是后者的3.12倍,达到预期的性能指标,具有广泛的应用潜力.

  14. 交流综自保护装置的位置信号异常分析与改进%Analysis of abnormal position signal of AC integrated automatic protection device and improvement

    Institute of Scientific and Technical Information of China (English)

    曾庆汇; 胡志保

    2012-01-01

    The abnormal position signal of an AC integrated automatic protection device for HV switch cabinet during site test is investigated and it is found that the high potential between wires of AC circuit cable induced by the nearby power supply cables causes the abnormality. Three countermeasures are proposed and compared: DC integrated automatic protection device, wall hanging type power supply and separated inter-lock circuit cable. The separated inter-lock circuit cable is designed and implemented, and there is no any abnormality during the operation for about one year,showing its effectiveness. Suggestions are also provided in the type selection and design of secondary cables.%针对一起高压开关柜采用交流综自保护装置,在传动试验时出现跳合闸位置信号灯异常的现象进行了调查,发现是由于交流回路的电缆芯之间在相近电源的电缆芯线排列紧密时会产生很高的感应电势造成的.提出了采用直流综自保护装置、壁挂式电源、互锁回路电缆分开设计的3种解决方案,分析了3种方案的优缺点及性价比.对互锁回路电缆分开设计及实施后,对其进行了近一年的运行跟踪统计,没有出现异常,证明了该方案的有效性.并对二次电缆选型、设计提出了建议.

  15. Dynamic test devices for analyzing the tensile properties of concrete

    NARCIS (Netherlands)

    Forquin, P.; Riedel, W.; Weerheijm, J.

    2013-01-01

    Owing to their low tensile failure strain, concrete is a difficult material to test under dynamic tensile loading. Indeed, conventional testing apparatuses such as high-speed hydraulic presses or Split Hopkinson Bar facilities rely on a mechanical balance of the specimen implying a short round-trip

  16. Automatic evaluation of the 30-s chair stand test using inertial/magnetic-based technology in an older prefrail population.

    Science.gov (United States)

    Millor, Nora; Lecumberri, Pablo; Gomez, Marisol; Martinez-Ramirez, Alicia; Rodriguez-Manas, Leocadio; Garcia-Garcia, Francisco José; Izquierdo, Mikel

    2013-07-01

    The aim of this study was to evaluate the inertial measures of the 30-s chair stand test using modern body-fixed motion sensors. Polynomial data fitting was used to correct the drift effect in the position estimation. Thereafter, the three most important test cycles phases ("impulse," "stand up," and "sit down") were characterized and automatically analyzed. Automated test control is provided, making it possible for researchers without engineering knowledge to run the test. A collection of meaningful data based on kinematic variables is selected for further research. The proposed methodology for data analysis is a feasible tool for use in clinical settings. This method may not only improve rehabilitation therapies but also identify people at risk for falls more accurately than simply evaluating the number of cycles.

  17. Design and Testing of Electronic Devices for Harsh Environments

    CERN Document Server

    Nico, Costantino

    This thesis reports an overview and the main results of the research activity carried out within the PhD programme in Information Engineering of the University of Pisa (2010-2012). The research activity has been focused on different fields, including Automotive and High Energy Physics experiments, according to a common denominator: the development of electroni c devices and systems operating in harsh environments. There are many applications that forc e the adoption of design methodologies and strategies focused on this type of envir onments: military, biom edical, automotive, industrial and space. The development of solutions fulfilling specific operational requirements, therefore represents an interesting field of research. The first research activity has been framed within the ATHENIS project, funded by the CORDIS Commission of the European Community, and aiming at the development of a System-on-Chip, a r egulator for alternators employed on vehicles, presenting both configurability an d t...

  18. Results of long-term field tests of protective earthing device for vessel electric systems

    Directory of Open Access Journals (Sweden)

    Blaginin V.A.

    2015-03-01

    Full Text Available The results of prolonged natural tests of protective neutral earthing device for controlling the fire and electrical safety of vessel electric systems have been shown. The use of such devices provides safe single-phase fault currents and reducing arc overvoltage during the long-term operation of a ship. The results of long-term monitoring of the device operation as part of the existing vessel electric power system have confirmed its effectiveness

  19. Results of long-term field tests of protective earthing device for vessel electric systems

    OpenAIRE

    Blaginin V.A.; Kazhekin I.E.; Yusyp V.M.; Moskalyuk A.M.; Syrenko D.P.

    2015-01-01

    The results of prolonged natural tests of protective neutral earthing device for controlling the fire and electrical safety of vessel electric systems have been shown. The use of such devices provides safe single-phase fault currents and reducing arc overvoltage during the long-term operation of a ship. The results of long-term monitoring of the device operation as part of the existing vessel electric power system have confirmed its effectiveness

  20. 汽车自动行驶装置设计%Design of vehicle automatic driving device

    Institute of Scientific and Technical Information of China (English)

    吴小邦

    2012-01-01

    The control of fire engines automatically traveling, mainly related to the key technologies of the steering, gear, brake and clutch control,its organization has used the machinery integration type or the air operated integration types of control,may be installed near the gear shift box in the vehicle and the bottom of the cab outside the narrow space. Use fire engine gas source and apply the pneumatic control localization,can be easy debugging and maintenance-free. Use single-power control solenoid valve, can be done for vehicles when it meet unexpected power outages,the every cylinder can be back to its original position.%对消防车自动行驶的控制,主要涉及转向、排挡、刹车和离合器控制等关键技术,其机构均采用机械集成式或气动集成控制形式,可安装在车辆的换挡箱附近、驾驶室外底部狭小空间;利用消防车的气源,应用气动控制定位,使调试更加方便、免维护;采用单电控电磁阀能确保在车辆意外断电时各气缸回复至原位.

  1. Study and Design on Device of Egg Automatic Collection%自动集蛋装置的研究与设计

    Institute of Scientific and Technical Information of China (English)

    李彦蓉; 王爱民; 张海云

    2014-01-01

    This paper described the significance and importance of the aquaculture industry automation .The structure and working principle of the mechanical system and control system were introduced in detail .The screw pair and two hy-draulic cylinders were chosen in the drive system , and 89 C51 microcontroller and stepper motors were used in the control system .Coordination of the entire device ensured accurate position of the egg collection device and automatic collection for the eggs at different heights .%简述了养殖业自动化的意义及重要性,详细介绍了自动集蛋装置机械系统和控制系统的结构组成及工作原理。自动集蛋装置的传动系统采用螺旋副及二级液压缸,控制系统采用89 C51单片机和步进电机。整套装置工作协调,实现了集蛋装置的准确定位以及不同高度鸡蛋的自动收集。

  2. A qualification test for relay contacts as isolation devices in nuclear power plants

    Energy Technology Data Exchange (ETDEWEB)

    Beck, C.E.; Behera, A.K. [Kiran Consultants, Inc., Downers Grove, IL (United States); Polanco, S.; Terry, B. [ComEd Materials Engineering Group, Bolingbrook, IL (United States). Central Receiving, Inspection, and Test Facility

    1995-10-01

    A methodology is introduced for testing the integrity of relay contacts as isolation devices in Class IE circuits. A design activity that installed a new relay established the need for a new type of qualification test. This paper descries the process of establishing the test methodology, the development of the test plan, and the results of testing. It also describes the limitations of applying the results of any specific test to actual field installations, and offers other potential uses of the methodology.

  3. Design of automatic testing facility for thermal shrinkage rate of tear tape for cigarette%烟用拉线热收缩率自动测试装置的设计

    Institute of Scientific and Technical Information of China (English)

    方细玲; 李小兰; 李志刚; 刘丹; 陈海鸥; 花昌义; 刘勇; 容秀英; 李旭华

    2014-01-01

    为了提高拉线热收缩率测量结果的准确性,设计出一款烟用拉线热收缩率的自动测试装置。该装置利用拉力传感器来判断烟用拉线取样和测量时的张紧状态,利用位移传感器来记录烟用拉线的长度变化。对多种类型拉线热收缩率的测试结果表明,该装置具有较好的准确性和重复性,能够满足测试要求。%In order to improve the measurement accuracy of thermal shrinkage rate of tear tape,an automat-ic test facility for thermal shrinkage rate of tear tape for cigarette was designed.It was put forward to use tension sensor to determine the tensioning state of the tear tape for cigarette in both sample and measure conditions,and use displacement sensor to monitor the change in length.The designed device was used to test thermal shrinkage rate and according to the test results,this device had good accuracy and repeatabili-ty.The facility could meet requirements from this test method.

  4. Control device for automatic orientation of a solar panel based on a microcontroller (PIC16f628a)

    Science.gov (United States)

    Rezoug, M. R.; Krama, A.

    2016-07-01

    This work proposes a control device for autonomous solar tracker based on one axis, It consists of two main parts; the control part which is based on "the PIC16f628a"; it has the role of controlling, measuring and plotting responses. The second part is a mechanical device, which has the role of making the solar panel follows the day-night change of the sun throughout the year. Both parties are established to improve energy generation of the photovoltaic panels. In this paper, we will explain the main operating principles of our system. Also, we will provide experimental results which demonstrate the good performance and the efficiency of this system. This innovation is different from what has been proposed in previous studies. The important points of this system are maximum output energy and minimum energy consumption of solar tracker, its cost is relatively low with simplicity in implementation. The average power increase produced by using the tracking system for a particular day, is over 30 % compared with the static panel.

  5. Test of swedish anti-skid devices on five different slippery surfaces.

    Science.gov (United States)

    Gard, G; Lundborg, G

    2001-01-01

    The interest for effective preventive strategies for slips and falls is growing. Much remains to be done, however, to prevent slips and falls in the traffic environment. Some pedestrians are injured because of slippery pavements and roadways. Using an appropriate anti-skid device may reduce the risk of slips and falls on different surfaces outdoors during winter. The aim of this study was to evaluate new anti-skid devices on the Swedish market representing three different designs of anti-skid devices; heel device, fore-foot device and whole-foot device on different slippery surfaces, gravel, sand, salt, snow and ice. The evaluations were done according to subject's perceived walking safety and balance, videorecordings of walking postures and movements, time to take on and off each anti-skid device, advantages/disadvantages with each anti-skid device and a list of priority for own use according to three criteria; safety, balance and appearance. Practical tests were carried out on different slippery surfaces, gravel, sand, salt, snow and ice. The subject's were randomly selected from the registered population over 55 years in a city in northern Sweden. The results showed that eight or more of the ten subjects perceived all four anti-skid devices as fairly good or good regarding walking safety and balance when walking on gravel, sand, and salt. Anti-skid device 3, a whole-foot device was perceived as having none or bad walking safety and balance on snow by seven subjects and anti-skid device 4, a heel device, as having none or bad walking balance on ice by all ten subjects. Eight subjects walked with a normal muscle function in the hip and knee with all anti-skid devices on all surfaces. Small deviations in walking posture and movements were noted in one to two subjects when walking on different surfaces, but no systematic difference between the devices. Anti-skid device 1 'Rewa', a fixed heel device, was perceived as the most rapid one to take on. All four devices

  6. Combining Advanced Visualization and Automatized Reasoning for Webometrics: A Test Study

    CERN Document Server

    François, Claire; Shehabi, Shabi Al

    2008-01-01

    This paper presents a first attempt at performing a precise and automatic identification of the linking behaviour in a scientific domain through the analysis of the communication of the related academic institutions on the web. The proposed approach is based on the paradigm of multiple viewpoint data analysis (MVDA) than can be fruitfully exploited to highlight relationships between data, like websites, carrying several kinds of description. It uses the MultiSOM clustering and mapping method. The domain that has been chosen for this study is the domain of Computer Science in Germany. The analysis is conduced on a set of 438 websites of this domain using all together, thematic, geographic and linking information. It highlights interesting results concerning both global and local linking behaviour.

  7. Application of automatic inspection system to nondestructive test of heat transfer tubes of primary pressurized water cooler in the high temperature engineering test reactor. Joint research

    Energy Technology Data Exchange (ETDEWEB)

    Takeda, Takeshi; Furusawa, Takayuki [Japan Atomic Energy Research Inst., Oarai, Ibaraki (Japan). Oarai Research Establishment; Miyamoto, Satoshi [Japan Atomic Power Company, Tokyo (Japan)

    2001-07-01

    Heat transfer tubes of a primary pressurized water cooled (PPWC) in the high temperature engineering test reactor (HTTR) form the reactor pressure boundary of the primary coolant, therefore are important from the viewpoint of safety. To establish inspection techniques for the heat transfer tubes of the PPWC, an automatic inspection system was developed. The system employs a bobbin coil probe, a rotating probe for eddy current testing (ECT) and a rotating probe for ultrasonic testing (UT). Nondestructive test of a half of the heat transfer tubes of the PPWC was carried out by the automatic inspection system during reactor shutdown period of the HTTR (about 55% in the maximum reactor power in this paper). The nondestructive test results showed that the maximum signal-to-noise ratio was 1.8 in ECT. Pattern and phase of Lissajous wave, which were obtained for the heat transfer tube of the PPWC, were different from those obtained for the artificially defected tube. In UT echo amplitude of the PPWC tubes inspected was lower than 20% of distance-amplitude calibration curve. Thus, it was confirmed that there was no defect in depth, which was more than the detecting standard of the probes, on the outer surface of the heat transfer tubes of the PPWC inspected. (author)

  8. Development of a Very High Cycle Fatigue (VHCF multiaxial testing device

    Directory of Open Access Journals (Sweden)

    M. Vieira

    2016-07-01

    Full Text Available The very high cycle region of the S-N fatigue curve has been the subject of intensive research on the last years, with special focus on axial, bending, torsional and fretting fatigue tests. Very high cycle fatigue can be achieved using ultrasonic exciters which allow for frequency testing of up to 30 kHz. Still, the multiaxial fatigue analysis is not yet developed for this type of fatigue analyses, mainly due to conceptual limitations of these testing devices. In this paper, a device designed to produce biaxial fatigue testing using a single piezoelectric axial exciter is presented, as well as the preliminary testing of this device. The device is comprised of a horn and a specimen, which are both attached to the piezoelectric exciter. The steps taken towards the final geometry of the device are presented. Preliminary experimental testing of the developed device is made using thermographic imaging, strain measurements and vibration speeds and indicates good behaviour of the tested specimen.

  9. Towards parsimony in habit measurement: Testing the convergent and predictive validity of an automaticity subscale of the Self-Report Habit Index

    Directory of Open Access Journals (Sweden)

    Gardner Benjamin

    2012-08-01

    Full Text Available Abstract Background The twelve-item Self-Report Habit Index (SRHI is the most popular measure of energy-balance related habits. This measure characterises habit by automatic activation, behavioural frequency, and relevance to self-identity. Previous empirical research suggests that the SRHI may be abbreviated with no losses in reliability or predictive utility. Drawing on recent theorising suggesting that automaticity is the ‘active ingredient’ of habit-behaviour relationships, we tested whether an automaticity-specific SRHI subscale could capture habit-based behaviour patterns in self-report data. Methods A content validity task was undertaken to identify a subset of automaticity indicators within the SRHI. The reliability, convergent validity and predictive validity of the automaticity item subset was subsequently tested in secondary analyses of all previous SRHI applications, identified via systematic review, and in primary analyses of four raw datasets relating to energy‐balance relevant behaviours (inactive travel, active travel, snacking, and alcohol consumption. Results A four-item automaticity subscale (the ‘Self-Report Behavioural Automaticity Index’; ‘SRBAI’ was found to be reliable and sensitive to two hypothesised effects of habit on behaviour: a habit-behaviour correlation, and a moderating effect of habit on the intention-behaviour relationship. Conclusion The SRBAI offers a parsimonious measure that adequately captures habitual behaviour patterns. The SRBAI may be of particular utility in predicting future behaviour and in studies tracking habit formation or disruption.

  10. Testing and examination of TMI-2 electrical components and discrete devices

    Energy Technology Data Exchange (ETDEWEB)

    Soberano, F.T.

    1982-11-01

    This report discusses the approach and results of the in situ test conducted on TMI-2 reactor building electrical components and discrete devices. Also included are the necessary presumptions and assumptions to correlate observed anomalies to the accident.

  11. A flexible and robust soft-error testing system for microelectronic devices and integrated circuits

    Institute of Scientific and Technical Information of China (English)

    王晓辉; 杨振雷; 童腾; 苏弘; 刘杰; 张战刚; 古松; 刘天奇; 孔洁; 赵兴文

    2015-01-01

    Single event effects (SEEs) induced by radiations become a significant reliability challenge for modern elec-tronic systems. To evaluate SEEs susceptibility for microelectronic devices and integrated circuits (ICs), an SEE testing system with flexibility and robustness was developed at Heavy Ion Research Facility in Lanzhou (HIRFL). The system is compatible with various types of microelectronic devices and ICs, and supports plenty of complex and high-speed test schemes and plans for the irradiated devices under test (DUTs). Thanks to the combination of meticulous circuit design and the hardened logic design, the system has additional performances to avoid an overheated situation and irradiations by stray radiations. The system has been tested and verified by experiments for irradiating devices at HIRFL.

  12. Determination of dithiocarbamate pesticides in occupational hygiene sampling devices using the isooctane method and comparison with an automatic thermal desorption (ATD) method.

    Science.gov (United States)

    Coldwell, Matthew R; Pengelly, Ian; Rimmer, Duncan A

    2003-01-10

    Two new methods for the determination of dithiocarbamate pesticides in occupational hygiene sampling devices are described. Dithiocarbamate spiked occupational hygiene sampling devices, consisting of glass fibre (GF/A) filters, cotton pads, cotton gloves and disposable overalls, were reduced under acidic conditions and the CS2 evolved as a decomposition product was extracted into isooctane. The isooctane was then analysed using gas chromatography with mass spectrometry, for CS2, which provided a quantitative result for dithiocarbamates. Recoveries obtained were generally within a 70-110% range and reproducibilities better than 15% RSD were typically achieved. The method has been successfully applied to samples collected during occupational exposure surveys. A second method employing automatic thermal desorption-gas chromatography-mass spectrometry (ATD-GC-MS) has also been developed and applied to the direct analysis of GF/A (airborne) samples. The method relies on the thermal degradation of dithiocarbamates to release CS2, which is used to quantify the analytes. Thiram spiked GF/A filters gave an average recovery of 107% with an RSD of 4%. The performance of the two analytical methods were directly compared by analysing sub-portions of GF/A filters collected during a survey to evaluate occupational exposures to thiram during seed treatment operations. Both methods performed well for the analysis of airborne (GF/A) samples and produced results in good agreement. ATD-GC-MS is the preferred method for studies involving GF/A (airborne) samples only. Because of the wider applicability of the isooctane method for other sampling devices, it is the preferred choice when carrying out surveys which require a dermal as well as respirable exposure assessment.

  13. Multiclassifier fusion of an ultrasonic lip reader in automatic speech recognition

    Science.gov (United States)

    Jennnings, David L.

    1994-12-01

    This thesis investigates the use of two active ultrasonic devices in collecting lip information for performing and enhancing automatic speech recognition. The two devices explored are called the 'Ultrasonic Mike' and the 'Lip Lock Loop.' The devices are tested in a speaker dependent isolated word recognition task with a vocabulary consisting of the spoken digits from zero to nine. Two automatic lip readers are designed and tested based on the output of the ultrasonic devices. The automatic lip readers use template matching and dynamic time warping to determine the best candidate for a given test utterance. The automatic lip readers alone achieve accuracies of 65-89%, depending on the number of reference templates used. Next the automatic lip reader is combined with a conventional automatic speech recognizer. Both classifier level fusion and feature level fusion are investigated. Feature fusion is based on combining the feature vectors prior to dynamic time warping. Classifier fusion is based on a pseudo probability mass function derived from the dynamic time warping distances. The combined systems are tested with various levels of acoustic noise added. In one typical test, at a signal to noise ratio of 0dB, the acoustic recognizer's accuracy alone was 78%, the automatic lip reader's accuracy was 69%, but the combined accuracy was 93%. This experiment demonstrates that a simple ultrasonic lip motion detector, that has an output data rate 12,500 times less than a typical video camera, can significantly improve the accuracy of automatic speech recognition in noise.

  14. Flight test results of an automatic support system on board a YF-12A airplane. [for jet engine inlet air control

    Science.gov (United States)

    Love, J. E.

    1974-01-01

    An automatic support system concept that isolated faults in an existing nonavionics subsystem was flight tested up to a Mach number of 3. The adaptation of the automated support concept to an existing system (the jet engine automatic inlet control system) caused most of the problems one would expect to encounter in other applications. These problems and their solutions are discussed. Criteria for integrating automatic support into the initial design of new subsystems are included in the paper. Cost effectiveness resulted from both the low maintenance of the automated system and the man-hour saving resulting from the real time diagnosis of the monitored subsystem.

  15. A Review on Key Issues and Challenges in Devices Level MEMS Testing

    Directory of Open Access Journals (Sweden)

    Muhammad Shoaib

    2016-01-01

    Full Text Available The present review provides information relevant to issues and challenges in MEMS testing techniques that are implemented to analyze the microelectromechanical systems (MEMS behavior for specific application and operating conditions. MEMS devices are more complex and extremely diverse due to the immersion of multidomains. Their failure modes are distinctive under different circumstances. Therefore, testing of these systems at device level as well as at mass production level, that is, parallel testing, is becoming very challenging as compared to the IC test, because MEMS respond to electrical, physical, chemical, and optical stimuli. Currently, test systems developed for MEMS devices have to be customized due to their nondeterministic behavior and complexity. The accurate measurement of test systems for MEMS is difficult to quantify in the production phase. The complexity of the device to be tested required maturity in the test technique which increases the cost of test development; this practice is directly imposed on the device cost. This factor causes a delay in time-to-market.

  16. Effect of lubricants on friction in laboratory tests of a total disc replacement device.

    Science.gov (United States)

    Moghadas, Parshia; Mahomed, Aziza; Hukins, David W L; Shepherd, Duncan E T

    2013-09-01

    Some designs of total disc replacement devices have articulating bearing surfaces, and these devices are tested in vitro with a lubricant of diluted calf serum. It is believed that the lubricant found in total disc replacement devices in vivo is interstitial fluid that may have properties between that in Ringer's solution and diluted calf serum. To investigate the effect of lubricants, a set of friction tests were performed on a generic model of a metal against metal ball-and-socket total disc replacement device. Two devices were tested: one with a ball radius of 10 mm and other with a ball radius of 16 mm; each device had a radial clearance of 0.015 mm. A spine simulator was used to measure frictional torque for each device in axial rotation, flexion-extension and lateral bending at frequencies of 0.25-2 Hz, under 1200 N axial load. Each device was tested with two different lubricants: a solution of new born calf serum diluted with deionised water and Ringer's solution. The results showed that the frictional torque generated between the bearing surfaces was significantly higher in Ringer's solution than in diluted calf serum. The use of Ringer's solution as a lubricant provides a stringent test condition to detect possible problems. Diluted calf serum is more likely to provide an environment closer to that in vivo. However, the precise properties of the fluid lubricating a total disc replacement device are not known; hence, tests using diluted calf serum may not necessarily give the same results as those obtained in vivo.

  17. 33 CFR 159.126a - Suspended solids test: Type II devices.

    Science.gov (United States)

    2010-07-01

    ... suspended solids in accordance with 40 CFR part 136. The arithmetic mean of the total suspended solids in 38... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Suspended solids test: Type II... Suspended solids test: Type II devices. During the sewage processing test (§ 159.121) 40 effluent samples...

  18. The Effect of Asterisks as an Attention Focusing Device on Test Performance of Undergraduate Students.

    Science.gov (United States)

    Perrin, David W.; Kerasotes, Dean L.

    It was hypothesized that using asterisks as attention focusing devices would cause students to read all asteriked test items more carefully and would improve test scores of undergraduate education students. Sixty-three undergraduates majoring in elementary or special education were administered a 36-item objective test. Asterisks were used to…

  19. Development of Proposed Standards for Testing Solar Collectors and Thermal Storage Devices. NBS Technical Note 899.

    Science.gov (United States)

    Hill, James E.; And Others

    A study has been made at the National Bureau of Standards of the different techniques that are or could be used for testing solar collectors and thermal storage devices that are used in solar heating and cooling systems. This report reviews the various testing methods and outlines a recommended test procedure, including apparatus and…

  20. Microbiological testing of devices used in maintaining peripheral venous catheters.

    Science.gov (United States)

    Rossini, Fernanda de Paula; Andrade, Denise de; Santos, Lissandra Chaves de Sousa; Ferreira, Adriano Menis; Tieppo, Caroline; Watanabe, Evandro

    2017-05-15

    to evaluate the use of peripheral venous catheters based on microbiological analysis of devices (dressing and three-way stopcocks) and thus contribute to the prevention and infection control. this was a prospective study of microbiological analysis of 30 three-way stopcocks (external surfaces and lumens) and 30 dressing used in maintaining the peripheral venous catheters of hospitalized adult patients. all external surfaces, 40% of lumens, and 86.7% of dressing presented bacterial growth. The main species isolated in the lumen were 50% coagulase-negative Staphylococcus, 14.3% Staphylococcus aureus, and 14.3% Pseudomonas aeruginosa. Fifty nine percent of multidrug-resistant bacteria were isolated of the three-way stopcocks, 42% of the lumens, and 44% of the dressing with a predominance of coagulase-negative Staphylococcus resistant to methicillin. Besides, 18% gram-negative bacteria with resistance to carbapenems were identified from multidrug-resistant bacteria on the external surfaces of the three-way stopcocks. it is important to emphasize the isolation of coagulase-negative Staphylococcus and gram-negative bacteria resistant to methicillin and carbapenems in samples of devices, respectively, which reinforces the importance of nursing care in the maintenance of the biologically safe environment as well as prevention and infection control practices. avaliar o uso de cateteres venosos periféricos com base em análises microbiológicas de dispositivos (curativos e torneiras de três vias - T3Vs) e assim contribuir para a prevenção e controle de infecção. estudo prospectivo de análise microbiológica de 30 T3Vs (superfícies externas e lúmens) e 30 curativos utilizados na manutenção dos cateteres venosos periféricos de pacientes adultos hospitalizados. todas as superfícies externas, 40% dos lúmens e 86,7% dos curativos apresentaram crescimento bacteriano. As principais espécies isoladas no lúmen foram 50% Staphylococcus coagulase-negativa, 14

  1. Automatic Control Design of Rust Removing Device for Pipe End%管端除锈设备自动控制设计

    Institute of Scientific and Technical Information of China (English)

    李建明; 邓志伟; 付雪强; 张世平; 江渊; 魏耀华

    2012-01-01

    In this article, it introduced the structure and functions of a new kind of SAW pipe end rust removing device, and expounded its working principle. At the same time, the full-automatic control technology of rust removing was designed based on SIEMENS S7-200 PLC. The productive practice proved that this automatic control design increased production efficiency, reduced failure rate and work labor cost, avoided unstable factors of manual operation, and realized stable rust removing quality.lt was in favour of HSE field management, and simple maintenance. Meanwhile, it avoided base metal scratch, increased rust removing quality. So it is applicable to widely promote in SAWH pipe industry.%介绍了一种新型螺旋埋弧焊管管端除锈设备的构造和功能,阐述了其工作原理,并基于西门子S7-200 PLC设计了除锈设备的全自动控制工艺.经过实际生产应用证明,管端除锈设备的自动控制设计提高了工作效率,维修、维护方便,故障率降低,更有利于HSE现场管理,避免了人工操作的不稳定因素,降低了劳动力成本,保证了管端除锈质量的稳定,同时,避免了母材划伤,提高了除锈质量,在同行业中具有很好的推广应用价值.

  2. Radiation Testing, Characterization and Qualification Challenges for Modern Microelectronics and Photonics Devices and Technologies

    Science.gov (United States)

    LaBel, Kenneth A.; Cohn, Lewis M.

    2008-01-01

    At GOMAC 2007, we discussed a selection of the challenges for radiation testing of modern semiconductor devices focusing on state-of-the-art memory technologies. This included FLASH non-volatile memories (NVMs) and synchronous dynamic random access memories (SDRAMs). In this presentation, we extend this discussion in device packaging and complexity as well as single event upset (SEU) mechanisms using several technology areas as examples including: system-on-a-chip (SOC) devices and photonic or fiber optic systems. The underlying goal is intended to provoke thought for understanding the limitations and interpretation of radiation testing results.

  3. A Pull-in Based Test Mechanism for Device Diagnostic and Process Characterization

    Directory of Open Access Journals (Sweden)

    L. A. Rocha

    2008-01-01

    Full Text Available A test technique for capacitive MEMS accelerometers and electrostatic microactuators, based on the measurement of pull-in voltages and resonance frequency, is described. Using this combination of measurements, one can estimate process-induced variations in the device layout dimensions as well as deviations from nominal value in material properties, which can be used either for testing or device diagnostics purposes. Measurements performed on fabricated devices confirm that the 250 nm overetch observed on SEM images can be correctly estimated using the proposed technique.

  4. An open-source framework for testing tracking devices using Lego Mindstorms

    Science.gov (United States)

    Jomier, Julien; Ibanez, Luis; Enquobahrie, Andinet; Pace, Danielle; Cleary, Kevin

    2009-02-01

    In this paper, we present an open-source framework for testing tracking devices in surgical navigation applications. At the core of image-guided intervention systems is the tracking interface that handles communication with the tracking device and gathers tracking information. Given that the correctness of tracking information is critical for protecting patient safety and for ensuring the successful execution of an intervention, the tracking software component needs to be thoroughly tested on a regular basis. Furthermore, with widespread use of extreme programming methodology that emphasizes continuous and incremental testing of application components, testing design becomes critical. While it is easy to automate most of the testing process, it is often more difficult to test components that require manual intervention such as tracking device. Our framework consists of a robotic arm built from a set of Lego Mindstorms and an open-source toolkit written in C++ to control the robot movements and assess the accuracy of the tracking devices. The application program interface (API) is cross-platform and runs on Windows, Linux and MacOS. We applied this framework for the continuous testing of the Image-Guided Surgery Toolkit (IGSTK), an open-source toolkit for image-guided surgery and shown that regression testing on tracking devices can be performed at low cost and improve significantly the quality of the software.

  5. A review of Doppler ultrasound quality assurance protocols and test devices.

    Science.gov (United States)

    Browne, Jacinta E

    2014-11-01

    In this paper, an overview of Doppler ultrasound quality assurance (QA) testing will be presented in three sections. The first section will review the different Doppler ultrasound parameters recommended by professional bodies for use in QA protocols. The second section will include an evaluation and critique of the main test devices used to assess Doppler performance, while the final section of this paper will discuss which of the wide range of test devices have been found to be most suitable for inclusion in Doppler QA programmes. Pulsed Wave Spectral Doppler, Colour Doppler Imaging QA test protocols have been recommended over the years by various professional bodies, including the UK's Institute of Physics and Engineering in Medicine (IPEM), the American Institute for Ultrasound in Medicine (AIUM), and the International Electrotechnical Commission (IEC). However, despite the existence of such recommended test protocols, very few commercial or research test devices exist which can measure the full range of both PW Doppler ultrasound and colour Doppler imaging performance parameters, particularly quality control measurements such as: (i) Doppler sensitivity (ii) colour Doppler spatial resolution (iii) colour Doppler temporal resolution (iv) colour Doppler velocity resolution (v) clutter filter performance and (vi) tissue movement artefact suppression. In this review, the merits of the various commercial and research test devices will be considered and a summary of results obtained from published studies which have made use of some of these Doppler test devices, such as the flow, string, rotating and belt phantom, will be presented.

  6. Research on the Making and Transporting Device of Automatic Vegetable Pot Machine Based on PLC%基于 PLC 的自动蔬菜穴盘钵机制钵和输送装置研究

    Institute of Scientific and Technical Information of China (English)

    王臻卓; 朱文琦; 李伟

    2017-01-01

    The seedling transplanting technology is a modern agricultural production technology, has been widely used at home and abroad. In the process of transplanting seedling transplanting, most of the methods used are manual work, which has low efficiency and great damage to the seedlings. In order to improve the automation degree of the pot seedling transplanting, a new type of automatic bowl and conveying device for the vegetable bowl seedling transplanting machine based on PLC was designed. The device adopts the PLC control system, the servo motor and step into motor can realize high precision seedling launched and accurate positioning, reducing the loss of rice seedlings. Using the belt drive and gear transmission to realize the synchronization of the drum and the planting device. Finally in an experimental green-house seedlings automatic conveying device were tested, in order to validate the experimental machine effect, the artifi-cial experimental results and testing machine test results were compared, by the test results show that the based on PLC control system vegetable plug seedling machine transplanting operation and manual methods compared, vegetable seedling loss rate declined, dropping seedling rate increase, which verified the reliability of the device.%钵苗移栽技术是一项现代农业增产技术,在国内外得到了广泛应用。在钵苗移栽作业过程中,大部分采用的是人工作业的方式,这种作业方式作业效率低,并且对苗的损害较大。为了提高钵苗移栽的自动化程度,设计了一种新的基于 PLC 的蔬菜钵苗移栽机自动制钵和输送装置。该装置采用 PLC 控制系统,利用伺服电机和步进电机可以实现高精度秧苗的推出和准确定位,降低了秧苗的损失。利用带传动和齿轮传动实现了转筒和栽植器的同步。最后,在实验大棚对穴盘钵苗自动输送装置的效果进行了测试,为了验证试验机的效果,将人工实验

  7. ASTROD I - Astrodynamical Space Test of Relativity using Optical Devices

    Science.gov (United States)

    Selig, Hanns; Ni, Wei-Tou; Laemmerzahl, Claus

    In 2011 ASTROD I has been selected as one of the final 14 candidates for the Cosmic Vision M3 mission. ASTROD I is a planned interplanetary space mission with multiple goals. The primary aims are: to test general relativity with an improvement in sensitivity of over three orders of magnitude, improving our understanding of gravity and aiding the development of a new quantum gravity theory; to measure key solar system parameters with increased accuracy, advancing solar physics and our knowledge of the solar system; and to measure the time rate of change of the gravitational constant with an order of magnitude improvement and probing dark matter and dark energy gravitationally. It is an international project, and is envisaged as the first in a series of ASTROD missions. ASTROD I will consist of one spacecraft carrying a telescope, four lasers, two event timers and a clock. Two-way, two-wavelength laser pulse ranging will be used between the spacecraft in a solar orbit and deep space laser stations on Earth, to achieve the ASTROD I goals. Finally the mission was not selected for the final 4 candidates for CV M3 in 2011. Nevertheless, ASTROD is a very promising concept for a fundamental physics space mission and shares some key technologies with other popular space missions like LISA and Jason 2 (T2L2). We have also considered possibilities (i) to add an ASTROD I laser ranging package to other fundamental missions for testing the dynamics of relativistic gravity; (ii) to fully combine ASTROD I with another fundamental mission using basic technology of the LISA Pathfiner (this could also be good for a LISA-type mission scheduled to launch 20 years later). In this paper, we present various possibilities of our study.

  8. DEVELOPMENT AND TESTING TOOL FOR PAPER HANDLING AND/OR PRINTER DEVICES

    Directory of Open Access Journals (Sweden)

    H. Gutiérrez

    2003-04-01

    Full Text Available A useful development and testing tool for Hewlett Packard paper handling and/or printer devices is presented.The system provides a microprocessor based general architecture integrated by two PCB cards and asoftware application, used to improve new product design and testing. Paper handling devices operation isbased on DC motors, stepper motors and sensors components, so a graphical user interface was developedin order to configure, drive, and test them. The implemented tool allows a time reduction greater than 50% forthe development and test of prototypes.

  9. Indigenous Design for Automatic Testing of Tensile Strength Using Graphical User Interface

    Directory of Open Access Journals (Sweden)

    Ali Rafay

    2016-01-01

    Full Text Available Tensile Testing is a fundamental material test to measure the tenacity and tensile strength. Tensile strength means ability to take tensile stress. This Universal Testing Machine is designed using Dual Cylinder Technique in order to comply with the maximun load (tensile force with the reduction of minimum physical effort and minimized losses.It is to provide material testing opportunity to the students of different institutions, locally and globally, at lowest price; so that they can have a comprehensive understanding of the testing procedures and examining material properties on practical grounds with a minimum expenditure. The testing mechanism is automated along with the inclusion of all necessary parameters and the movement of the members. Specimens of different engineering materials were used to carry out the test and their mechanical strength was tested and compared with the actual values

  10. Evaluation of ten oral fluid point-of-collection drug-testing devices.

    Science.gov (United States)

    Walsh, J Michael; Crouch, Dennis J; Danaceau, Jonathan P; Cangianelli, Leo; Liddicoat, Laura; Adkins, Randy

    2007-01-01

    Previously, the laboratory evaluations of six point-of-collection oral fluid (POC-OF) drug testing devices were reported. Four additional devices, Oralstat (American Bio Medica); SmartClip (Envitec); Impact (LifePoint); and OraLine IV s.a.t (Sun Biomedical Laboratories), were recently evaluated for their ability to meet the claimed (and proposed) cutoff concentrations set by the manufacturers for the detection of amphetamine(s), cocaine/metabolite, opiates, and cannabinoids (Oralstat also benzodiazepines). With the exception of the Sun Biomedical device, actual false-positive results were not encountered. Most devices performed well for the detection of opiates and amphetamine(s), but approximately half had amphetamine(s) cutoff concentrations greater than that proposed by the Substance Abuse and Mental Health Services Administration (SAMHSA). Only three devices had cocaine cutoffs less than or equal to 20 ng/mL (SAMHSA), and a number of false-negative results were obtained. The devices still were not capable of detecting Delta(9)-tetrahydrocannabinol at 4 ng/mL (SAMHSA). However, sensitivities improved since the initial studies, and approximately half of the devices met the THC-COOH cutoff proposed by SAMHSA. Results from the current and previous evaluations are presented in the paper and indicate that the sensitivity and performance of commercial OF drug testing devices is improving, but remains problematic for the reliable detection of cannabinoid use.

  11. 全自动玉米秧苗移栽机的研制与试验%Development and test of automatic corn seedling transplanter

    Institute of Scientific and Technical Information of China (English)

    石铁

    2015-01-01

    transplanting unit, a rack and an earthing and watering part. The seedling transporting and selecting transmission mechanism can automatically eliminate paper pots without seedlings or those with weak seedlings and accelerate seedling supplying so as to guarantee the uniformity of seedlings. The rapid automatic seeding device can realize functions such as automatic grabbing, separation and stacking of paper pot seedlings as well as automatic feeding of seedling disc. The function of the transplanting unit is to ditch, erect seedlings and perform transplanting. The earthing and watering part can perform watering and earthing operation to the seedling ditch after transplanting. The driving force for the seedling transporting and selecting case and the transplanting unit is from the friction between the supporting roller and ground; the power for the automatic seeding system is from the hydraulic motor driven by the rear power output shaft of a tractor; the logical relationships for various working parts are driven by the PLC control module. The transplanter realizes full-automatic transplanting by using a full hydraulic power system and an automatic control system with PLC as its core module. The transplanter applies a three-point rear suspension and it is used in combination with roller tractors above 48kW. The transplanter can be used in both ridge planting and flat planting. The field test results showed that, when the advancing speed of a unit is 2.5-3.0 km/h and the theoretical row spacing is 22 cm, the qualified rate of transplanting depth is 87.5% and, the qualified rate of row spacing is 93.2% and the qualified rate of seedling verticality is 91.2%, which meets the agricultural requirements of corn paper pot seedling transplanting. The transplanter is a mechanized carrier of carrying out the new type agricultural technology of corn paper pot seedling transplanting, and it can enhance the standardization, mechanization and automation degree of corn paper pot seedling

  12. Modernized build and test infrastructure for control software at ESO: highly flexible building, testing, and automatic quality practices for telescope control software

    Science.gov (United States)

    Pellegrin, F.; Jeram, B.; Haucke, J.; Feyrin, S.

    2016-07-01

    The paper describes the introduction of a new automatized build and test infrastructure, based on the open-source software Jenkins1, into the ESO Very Large Telescope control software to replace the preexisting in-house solution. A brief introduction to software quality practices is given, a description of the previous solution, the limitations of it and new upcoming requirements. Modifications required to adapt the new system are described, how these were implemented to current software and the results obtained. An overview on how the new system may be used in future projects is also presented.

  13. MISMATCH: A basis for semi-automatic functional mixed-signal test-pattern generation

    NARCIS (Netherlands)

    Kerkhoff, Hans G.; Tangelder, R.J.W.T.; Speek, Han; Engin, N.

    1996-01-01

    This paper describes a tool which assists the designer in the rapid generation of functional tests for mixed-signal circuits down to the actual test-signals for the tester. The tool is based on manipulating design data, making use of macro-based test libraries and tester resources provided by the

  14. Testing and Benchmarking a 2014 GM Silverado 6L80 Six Speed Automatic Transmission

    Science.gov (United States)

    Describe the method and test results of EPA’s partial transmission benchmarking process which involves installing both the engine and transmission in an engine dynamometer test cell with the engine wire harness tethered to its vehicle parked outside the test cell.

  15. Test method of frequency response based on diamond surface acoustic wave devices

    Institute of Scientific and Technical Information of China (English)

    CHEN Xi-ming; YANG Bao-he; WU Xiao-guo; WU Yi-zhuo

    2011-01-01

    In order to reduce the noises affixed to the signals when testing high frequency devices, a single-port test mode (S11) is used to test frequency response of high frequency (GHz) and dual-port surface acoustic wave devices (SAWDs) in this paper.The feasibility of the test is proved by simulating the Fabry-Perot model. The frequency response of the high-frequency dual-port resonant-type diamond SAWD is measured by S11 and the dual-port test mode (S21), respectively. The results show that the quality factor of the device is 51.29 and the 3 dB bandwidth is 27.8 MHz by S11 -mode measurement, which is better than the S21 mode, and is consistent with the frequency response curve by simulation.

  16. Production optimization of 99Mo/99mTc zirconium molybate gel generators at semi-automatic device: DISIGEG.

    Science.gov (United States)

    Monroy-Guzman, F; Rivero Gutiérrez, T; López Malpica, I Z; Hernández Cortes, S; Rojas Nava, P; Vazquez Maldonado, J C; Vazquez, A

    2012-01-01

    DISIGEG is a synthesis installation of zirconium (99)Mo-molybdate gels for (99)Mo/(99m)Tc generator production, which has been designed, built and installed at the ININ. The device consists of a synthesis reactor and five systems controlled via keyboard: (1) raw material access, (2) chemical air stirring, (3) gel dried by air and infrared heating, (4) moisture removal and (5) gel extraction. DISIGEG operation is described and dried condition effects of zirconium (99)Mo- molybdate gels on (99)Mo/(99m)Tc generator performance were evaluated as well as some physical-chemical properties of these gels. The results reveal that temperature, time and air flow applied during the drying process directly affects zirconium (99)Mo-molybdate gel generator performance. All gels prepared have a similar chemical structure probably constituted by three-dimensional network, based on zirconium pentagonal bipyramids and molybdenum octahedral. Basic structural variations cause a change in gel porosity and permeability, favouring or inhibiting (99m)TcO(4)(-) diffusion into the matrix. The (99m)TcO(4)(-) eluates produced by (99)Mo/(99m)Tc zirconium (99)Mo-molybdate gel generators prepared in DISIGEG, air dried at 80°C for 5h and using an air flow of 90mm, satisfied all the Pharmacopoeias regulations: (99m)Tc yield between 70-75%, (99)Mo breakthrough less than 3×10(-3)%, radiochemical purities about 97% sterile and pyrogen-free eluates with a pH of 6.

  17. Automatic testing and assessment of neuroanatomy using a digital brain atlas: method and development of computer- and mobile-based applications.

    Science.gov (United States)

    Nowinski, Wieslaw L; Thirunavuukarasuu, Arumugam; Ananthasubramaniam, Anand; Chua, Beng Choon; Qian, Guoyu; Nowinska, Natalia G; Marchenko, Yevgen; Volkau, Ihar

    2009-10-01

    Preparation of tests and student's assessment by the instructor are time consuming. We address these two tasks in neuroanatomy education by employing a digital media application with a three-dimensional (3D), interactive, fully segmented, and labeled brain atlas. The anatomical and vascular models in the atlas are linked to Terminologia Anatomica. Because the cerebral models are fully segmented and labeled, our approach enables automatic and random atlas-derived generation of questions to test location and naming of cerebral structures. This is done in four steps: test individualization by the instructor, test taking by the students at their convenience, automatic student assessment by the application, and communication of the individual assessment to the instructor. A computer-based application with an interactive 3D atlas and a preliminary mobile-based application were developed to realize this approach. The application works in two test modes: instructor and student. In the instructor mode, the instructor customizes the test by setting the scope of testing and student performance criteria, which takes a few seconds. In the student mode, the student is tested and automatically assessed. Self-testing is also feasible at any time and pace. Our approach is automatic both with respect to test generation and student assessment. It is also objective, rapid, and customizable. We believe that this approach is novel from computer-based, mobile-based, and atlas-assisted standpoints.

  18. From in vivo to in vitro: The medical device testing paradigm shift.

    Science.gov (United States)

    Kerecman Myers, Dayna; Goldberg, Alan M; Poth, Albrecht; Wolf, Michael F; Carraway, Joseph; McKim, James; Coleman, Kelly P; Hutchinson, Richard; Brown, Ronald; Krug, Harald F; Bahinski, Anthony; Hartung, Thomas

    2017-05-25

    Amid growing efforts to advance the replacement, reduction, and refinement of the use of animals in research, there is a growing recognition that in vitro testing of medical devices can be more effective, both in terms of cost and time, and also more reliable than in vivo testing. Although the technological landscape has evolved rapidly in support of these concepts, regulatory acceptance of alternative testing methods has not kept pace. Despite the acceptance by regulators of some in vitro tests (cytotoxicity, gene toxicity, and some hemocompatibility assays), many toxicity tests still rely on animals (irritation, sensitization, acute toxicity, reproductive/developmental toxicity), even where other industrial sectors have already abandoned them. Bringing about change will require a paradigm shift in current approaches to testing - and a concerted effort to generate better data on risks to human health from exposure to leachable chemicals from medical devices, and to boost confidence in devices and alternative testing methods. To help advance these ideas, stir debate about best practices, and coalesce around a roadmap forward, the JHU-Center for Alternatives to Animal Testing (CAAT) hosted a symposium in Baltimore, Maryland, in December 2013 - believed to be the first gathering dedicated to the topic of in vitro testing of medical devices. Industry representatives, academics, and regulators in attendance presented evidence to support the unique strengths and challenges associated with the approaches currently in use as well as new methods under development, and drew next steps to push the field forward from their presentations and discussion.

  19. Procedural Tests for Anti-G Protective Devices. Volume II. G-Sensitivity Tests

    Science.gov (United States)

    1979-12-01

    applications (2,4). This high purity carbon, having extremely low chemical reactivity, is presently being used in human subjects for prosthesis , cardiac...assist devices, dental implants, and percutaneous lead devices. The fact that high purity carbon is biologically inert is well documented (2-4,8,10), and...New England College, Henniker, N.H.). No. 2 (part 1), 41-47, 1971. 3. Bokros, J. C., et al. Prosthesis made of carbon. Chemtech 7:40-49 (1977). 4

  20. Design of a laboratory hydraulic device for testing of hydraulic pumps

    Directory of Open Access Journals (Sweden)

    Pavel Máchal

    2013-01-01

    Full Text Available The present contribution deals with solves problem of research of testing device to monitor of hydrostatic pumps durability about dynamic loading under laboratory conditions. When carrying out the design of testing device are based on load characteristics of tractor hydraulic circuit, the individual characteristics of hydraulic components and performed calculations. Load characteristics on the tractors CASE IH Magnum 310, JOHN DEERE 8100, ZETOR FORTERRA 114 41 and Fendt 926 Vario were measured. Design of a hydraulic laboratory device is based on the need for testing new types of hydraulic pumps or various types of hydraulic fluids. When creating of hydraulic device we focused on testing hydraulic pumps used in agricultural and forestry tractors. Proportional pressure control valve is an active member of the hydraulic device, which provides change of a continuous control signal into relative pressure of operating fluid. The advantage of a designed hydraulic system is possibility of simulation of dynamic operating loading, which is obtained by measurement under real conditions, and thereby creates laboratory conditions as close to real conditions as possible. The laboratory device is constructed at the Department of Transport and Handling, Faculty of Engineering, Slovak University of Agriculture in Nitra.

  1. Comparative studies of hemoperfusion devices. II. Pressure drop and flow uniformity tests.

    Science.gov (United States)

    Cooney, D O; Infantolino, W; Kane, R

    1979-01-01

    One resin-based hemoperfusion device and three charcoal-based hemoperfusion devices were tested to determine their pressure drop and flow uniformity characteristics. Measurements were made on pressure drop versus flow rate using distilled water and on pressure drop versus time using bovine blood. Effluent concentration curves obtained after the step-change introduction of a high molecular weight dye solution to each unit were used to determine the priming volumes of the devices and were interpreted to yield information regarding the uniformities of flow in each device. The pressure drop and priming volume values for the resin-based device were significantly higher than the corresponding values for the charcoal-based units.

  2. Office OperationTest Generation and Automatic Judgment of C# Language%Office操作题生成与自动判分的C#语言实现

    Institute of Scientific and Technical Information of China (English)

    高上雄

    2014-01-01

    Through the paperless examination of Office operation test generation and automatic judgment analysis, this paper uses the test operation test generation C/S architecture for Word and Excelland automatic judgment realization are discussed using C# language.%通过针对无纸化考试中Office操作题生成与自动判分的分析,该文采用C#语言采用C/S构架对Word及Excel的操作考试试题生成与自动判分的实现进行探讨。

  3. Study on a Kind of Automatic Glass Cleaning Device%一种自动清洗玻璃装置的研究

    Institute of Scientific and Technical Information of China (English)

    王灿; 施泓博; 孙长范

    2016-01-01

    A device is introduced that makes the cleaning of glass more automatic and that has certain security and higher cleaning efficiency. The research adopts a method of combining the traditional mechanical process and automation control. The method uses action parts that the crawler combined with sucker and cleaning components that can clean followed with blow the dust. The results of the study can avoid some existent drawbacks such as the imperfection of automation, the absence of safety and cleaning efficiency. According to the research results, the design of the device is feasible and innovative after the 3D modeling and model design and production.%本文介绍了一种能让清洁玻璃更加自动化,同时又具有一定的安全性和较高的清洁效率的装置,所做的研究采用把传统机械工艺和自动化控制相结合的方法,采用履带结合吸盘的行动部件,擦洗和吹尘并存的清洁部件,该研究的结果规避了不能完全实现自动化,安全性能低,清洁效率低这些现存的缺点。在经过3D建模和模型设计及制作后,根据研究成果表明,该装置的设计是可行且具有创新性的。

  4. 无动力燃煤除尘器自动控制装置%Dust-Free Coal-Fired No Power Automatic Control Device

    Institute of Scientific and Technical Information of China (English)

    何晶; 周兵

    2011-01-01

    This paper describes the working principle of automatic dust-free coal-fired no power control device.It uses LF356 opamp and metal electrode to design the wet and dry detection circuit, time relay、 relay、 moisture control circuit, SCM、TCL0832 A / D converter、 AT24C16 data memory、 MAX813 watchdog timer intelligent controller.The design method of various parts of hardware and software are described in detail.%介绍了无动力燃煤除尘器自动控制装置工作原理,采用LF356运算放大器和金属电极设计干湿检测电路;时间继电器、继电器、电磁阀设计湿润控制电路;单片机、TCL0832 A/D转换器、AT24C16数据存储器、MAX813看门狗定时器设计智能控制仪.详细阐述了各部分的硬件和软件设计方法.

  5. High-energy heavy ion testing of VLSI devices for single event upsets and latch up

    Indian Academy of Sciences (India)

    S B Umesh; S R Kulkarni; R Sandhya; G R Joshi; R Damle; M Ravindra

    2005-08-01

    Several very large scale integrated (VLSI) devices which are not available in radiation hardened version are still required to be used in spacecraft systems. Thus these components need to be tested for highenergy heavy ion irradiation to find out their tolerance and suitability in specific space applications. This paper describes the high-energy heavy ion radiation testing of VLSI devices for single event upset (SEU) and single event latch up (SEL). The experimental set up employed to produce low flux of heavy ions viz. silicon (Si), and silver (Ag), for studying single event effects (SEE) is briefly described. The heavy ion testing of a few VLSI devices is performed in the general purpose scattering chamber of the Pelletron facility, available at Nuclear Science Centre, New Delhi. The test results with respect to SEU and SEL are discussed.

  6. Portable Upconversion Nanoparticles-Based Paper Device for Field Testing of Drug Abuse.

    Science.gov (United States)

    He, Mengyuan; Li, Zhen; Ge, Yiying; Liu, Zhihong

    2016-02-01

    We report the first portable upconversion nanoparticles (UCNPs)-based paper device for road-side field testing of cocaine. Upon the recognition of cocaine by two pieces of rationally designed aptamer fragments, the luminescence of UCNPs immobilized on the paper is quenched by Au nanoparticles (AuNPs), which indicates the cocaine concentration. This device can give quantitative results in a short time with high sensitivity using only a smartphone as the apparatus. Moreover, this device is applicable in human saliva samples, and it also can be used to monitor the cocaine content change in blood samples. The results of this work demonstrate the prospect of developing UCNPs-based paper devices for field testing of drug abuse.

  7. Testing designing an electrical device compliant with the electromagnetic compatibility directive

    Science.gov (United States)

    Płaczek, M.; Maćkowski, M.; Nowak, P.

    2017-08-01

    The goal of presented work was to build an electronic device in order to test the effectiveness of different EMC-improving solutions. Three EMC tests were done in order to check the created device compliance with the electromagnetic compatibility directive. Each of them was conducted for both industrial and non-industrial parameters (voltage and field strength), according to IEC PN-EN 61000 standards. Three tests were done: conductive immunity test in EM clamp, radiated immunity test in GTEM chamber, radiated emission test in GTEM chamber. Firstly, the device’s conductive immunity was examined. The set of possible solutions was created by examining existing designs, papers, books and producers’ recommendations. In result, different component configurations were chosen to determine the most EMC-effective one. Next, electromagnetic compatibility of proposed device configurations was tested in the GTEM chamber (radiated immunity and radiated emission). Tests results are presented on charts and analysed in order to verify if designed device face requirements of the electromagnetic compatibility directive. It was verify which of proposed electromagnetic compatibility improving solutions can solve problems with electromagnetic compatibility.

  8. 77 FR 17457 - Work Group on Alternative Test Methods for Commercial Measuring Devices

    Science.gov (United States)

    2012-03-26

    ... National Institute of Standards and Technology Work Group on Alternative Test Methods for Commercial...: The National Institute of Standards and Technology (NIST) is forming a Work Group (WG) to examine alternative methods for testing the accuracy of commercial measuring devices including, but not limited...

  9. 49 CFR 192.731 - Compressor stations: Inspection and testing of relief devices.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 3 2010-10-01 2010-10-01 false Compressor stations: Inspection and testing of...) PIPELINE SAFETY TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM FEDERAL SAFETY STANDARDS Maintenance § 192.731 Compressor stations: Inspection and testing of relief devices. (a) Except for rupture...

  10. Assessment of Current Practice for Tank Testing of Small Marine Energy Devices

    DEFF Research Database (Denmark)

    Kofoed, Jens Peter; Frigaard, Peter

    Discussion Report. Equitable Testing and Evaluation of Marine Energy Extraction Devices in terms of Performance, Cost and Environmental Impact. The report is a contribution by Aalborg University (AAU) to the deliverable on Assessment of current practice for tank testing of small marine energy...

  11. Preliminary evaluation of an automatic device for extration of the almond of the babaçu coconut for impact

    OpenAIRE

    Paulo Sergio Feitosa Barroso

    2004-01-01

    Resumo: Este trabalho apresenta uma avaliação preliminar de um dispositivo automático para extração da amêndoa do coco babaçu por impacto. Nessa avaliação foram realizados testes para determinar a constante elástica do coco babaçu, bem como a força média de impacto capaz de quebrá-lo. A pneumática foi escolhida como tecnologia operativa do dispositivo por poder caracterizar-se como um sistema binário. A metodologia utilizada nas etapas de construção do circuito pneumático foi baseada na elabo...

  12. Method of Harmonic Balance in Full-Scale-Model Tests of Electrical Devices

    Science.gov (United States)

    Gorbatenko, N. I.; Lankin, A. M.; Lankin, M. V.

    2017-01-01

    Methods for determining the weber-ampere characteristics of electrical devices, one of which is based on solution of direct problem of harmonic balance and the other on solution of inverse problem of harmonic balance by the method of full-scale-model tests, are suggested. The mathematical model of the device is constructed using the describing function and simplex optimization methods. The presented results of experimental applications of the method show its efficiency. The advantage of the method is the possibility of application for nondestructive inspection of electrical devices in the processes of their production and operation.

  13. A Strategy for Automatic Quality Signing and Verification Processes for Hardware and Software Testing

    Directory of Open Access Journals (Sweden)

    Mohammed I. Younis

    2010-01-01

    Circuits in a production line. Comparatively, our result demonstrates that the proposed strategy outperforms the traditional block partitioning strategy with the mutant score of 100% to 90%, respectively, with the same number of test cases.

  14. Results of NASA/DARPA Automatic Probe and Drogue Refueling Flight Test

    Science.gov (United States)

    Schweikhard, Keith

    2008-01-01

    This slide presentation reviews the flight test from the autonomous airborne refueling system. It includes information on the prototype system that can autonomously perform fueling, including during a turn or mild turbulence, and the autonomous rendezvous capability.

  15. Automatic Test Bench for the Measurement of the Magnetic Interference on LVDTs

    CERN Document Server

    Spiezia, G; Masi, A; Pierno, A; Martino, M

    2010-01-01

    This paper proposes a rigorous and repeatable measurement procedure to analyze the effects of magnetic interferences on Linear Variable Differential Transformer sensors. This issue is neither addressed in the sensor datasheet, nor in the scientific literature. The potential of the method and the performance of an automated test bench, that implements the procedure, are proved by measuring the drift of the position reading due to external magnetic interferences on a commercial LVDT. Finally, the repeatability of the test bench is shown.

  16. Gantry-type Automatic Sheet Discharge Device Based on Mirror Making Production Line%基于制镜生产线的龙门式自动放片设备

    Institute of Scientific and Technical Information of China (English)

    刘增喜; 张金镌

    2014-01-01

    This paper introduces a full-automatic sheet-unload device,which is specially designed for mirror making production line and adapts to float glass unload way and unload the original glass sheet with gripping surface upward. Automatic sheet discharge can be easily realized for this device with the aid of glass holder containing original glass sheet.Compared with manipulator-type automatic device,this device has the advantages of simple structure,conven-ient operation,simple maintenance and relatively low cost.%该文介绍了一款为制镜线专门设计、能够适应浮法玻璃收片方式、能将玻璃原板抓取面朝上的全自动功能放片设备。这款设备在盛放玻璃原板的玻璃架等设备辅助下可以轻易实现自动化放片,相比机械手类的自动化设备结构简单,操作方便,维护保养简单,造价相对较低。

  17. 反应堆启堆用智能化外推临界装置堆上考验试验%Test on the Reactor with the Intelligent Extrapolation Criticality Device for Physical Startup Experiment

    Institute of Scientific and Technical Information of China (English)

    黄礼渊

    2011-01-01

    The Intelligent Extrapolation Criticality Device is used for automatic counting and automatic extrapolation during the criticality experiment on the reactor. Test must be performed on the zero - power reactor or other reactor before the Device is used. The paper describes the test situation and test results of the Device on the zero - power reactor. The test results show that the Device has the function of automatic counting and automatic extrapolation, the deviation of the extrapolation data is small, and it can satisfy the requirements of physical startup on the reactor.%反应堆启堆用智能化外推临界装置用于反应堆临界试验过程中进行自动计数和自动外推临界.该装置在用于外推临界试验之前必须在零功率反应堆或其它反应堆上进行考验试验.论文叙述了研制的反应堆启堆用智能化外推临界装置在零功率堆上考验试验的情况及试验结果.试验结果表明:智能化外推临界装置具有自动计数和自动外推临界的功能,且外推结果偏差小,满足反应堆物理启动试验的要求.

  18. Research on the overload protection reliability of moulded case circuit-breakers and its test device

    Institute of Scientific and Technical Information of China (English)

    LI Kui; LU Jian-guo; WU Yi; QIN Zhi-jun; YAO Dong-mei

    2007-01-01

    This paper analyzed the reliability and put forward the reliability index of overload protection for moulded case circuit breaker. The success rate was adopted as its reliability index of overload protection. Based on the reliability index and the reliability level, the reliability examination plan was analyzed and a test device for the overload protection of moulded case circuit-breaker was developed. In the reliability test of overload protection, two power sources were used, which reduced the time of conversion and regulation between two different test currents in the overload protection test, which made the characteristic test more accurate. The test device was designed on the base of a Windows system, which made its operation simple and friendly.

  19. Selected fault testing of electronic isolation devices used in nuclear power plant operation

    Energy Technology Data Exchange (ETDEWEB)

    Villaran, M.; Hillman, K.; Taylor, J.; Lara, J.; Wilhelm, W. [Brookhaven National Lab., Upton, NY (United States)

    1994-05-01

    Electronic isolation devices are used in nuclear power plants to provide electrical separation between safety and non-safety circuits and systems. Major fault testing in an earlier program indicated that some energy may pass through an isolation device when a fault at the maximum credible potential is applied in the transverse mode to its output terminals. During subsequent field qualification testing of isolators, concerns were raised that the worst case fault, that is, the maximum credible fault (MCF), may not occur with a fault at the maximum credible potential, but rather at some lower potential. The present test program investigates whether problems can arise when fault levels up to the MCF potential are applied to the output terminals of an isolator. The fault energy passed through an isolated device during a fault was measured to determine whether the levels are great enough to potentially damage or degrade performance of equipment on the input (Class 1E) side of the isolator.

  20. Frontline immunochromatographic device for on-site urine testing of amphetamines: laboratory validation using authentic specimens.

    Science.gov (United States)

    Beck, O; Kraft, M; Moeller, M R; Smith, B L; Schneider, S; Wennig, R

    2000-03-01

    We evaluated a new test device for amphetamines and methamphetamines (Frontline, cut-off limit 300 ng/mL) using authentic clinical and forensic specimens. The device is based on immunochromatography and is dipped into urine and read visually by comparison with a colour scale after a few minutes. A total of 658 specimens were tested by comparing results of the screening procedure with established immunoassays. Discordant results were further investigated by gas chromatography mass spectrometry or gas chromatography (with flame ionization detector). The Frontline device had a sensitivity of 93% and a specificity of 98%. When specimens were classified by urine amphetamine concentration, close agreement was obtained at concentrations below 150 ng/mL and above 1000 ng/mL. A small number of specimens with amphetamine concentrations between 300 and 1000 ng/mL tested negative in the Frontline test. This finding could to some extent be explained by the enantioselectivity of the antibodies in the Frontline test to d-amphetamine. We conclude that the performance of the Frontline test device for amphetamines is adequate for presumptive clinical and forensic screening.

  1. Development and Operation of an Automatic Rotor Trim Control System for the UH-60 Individual Blade Control Wind Tunnel Test

    Science.gov (United States)

    Theodore, Colin R.; Tischler, Mark B.

    2010-01-01

    An automatic rotor trim control system was developed and successfully used during a wind tunnel test of a full-scale UH-60 rotor system with Individual Blade Control (IBC) actuators. The trim control system allowed rotor trim to be set more quickly, precisely and repeatably than in previous wind tunnel tests. This control system also allowed the rotor trim state to be maintained during transients and drift in wind tunnel flow, and through changes in IBC actuation. The ability to maintain a consistent rotor trim state was key to quickly and accurately evaluating the effect of IBC on rotor performance, vibration, noise and loads. This paper presents details of the design and implementation of the trim control system including the rotor system hardware, trim control requirements, and trim control hardware and software implementation. Results are presented showing the effect of IBC on rotor trim and dynamic response, a validation of the rotor dynamic simulation used to calculate the initial control gains and tuning of the control system, and the overall performance of the trim control system during the wind tunnel test.

  2. [Testing system design and analysis for the execution units of anti-thrombotic device].

    Science.gov (United States)

    Li, Zhelong; Cui, Haipo; Shang, Kun; Liao, Yuehua; Zhou, Xun

    2015-02-01

    In an anti-thrombotic pressure circulatory device, relays and solenoid valves serve as core execution units. Thus the therapeutic efficacy and patient safety of the device will directly depend on their performance. A new type of testing system for relays and solenoid valves used in the anti-thrombotic device has been developed, which can test action response time and fatigue performance of relay and solenoid valve. PC, data acquisition card and test platform are used in this testing system based on human-computer interaction testing modules. The testing objectives are realized by using the virtual instrument technology, the high-speed data acquisition technology and reasonable software design. The two sets of the system made by relay and solenoid valve are tested. The results proved the universality and reliability of the testing system so that these relays and solenoid valves could be accurately used in the antithrombotic pressure circulatory equipment. The newly-developed testing system has a bright future in the aspects of promotion and application prospect.

  3. Fully automatic quantitative assessment of emphysema in computed tomography: comparison with pulmonary function testing and normal values

    Energy Technology Data Exchange (ETDEWEB)

    Heussel, C.P.; Hantusch, R.; Hartlieb, S. [University Hospital Heidelberg, Thoraxklinik Heidelberg, Heidelberg (Germany); University Hospital Heidelberg, Department of Interventional and Diagnostic Radiology, Thoraxklinik Heidelberg, Heidelberg (Germany); Herth, F.J.F.; Kappes, J.; Eberhardt, R. [University Hospital Heidelberg, Thoraxklinik Heidelberg, Heidelberg (Germany); Johannes Gutenberg University, Department of Pneumology and Critical Care Medicine, Heidelberg (Germany); Weinheimer, O. [Johannes Gutenberg University, Department of Interventional and Diagnostic Radiology, Mainz (Germany); Kauczor, H.U. [University Hospital Heidelberg, Department of Diagnostic Radiology, Heidelberg (Germany)

    2009-10-15

    Characterisation and quantification of emphysema are necessary for planning of local treatment and monitoring. Sensitive, easy to measure, and stable parameters have to be established and their relation to the well-known pulmonary function testing (PFT) has to be investigated. A retrospective analysis of 221 nonenhanced thin-section MDCT with a corresponding PFT was carried out, with a subgroup analysis in 102 COPD stage III+IV, 44 COPD stage 0, and 33 investigations into interstitial lung disease (ILD). The in-house YACTA software was used for automatic quantification of lung and emphysema volume [l], emphysema index, mean lung density (MLD [HU]) and 15{sup th} percentile [HU]. CT-derived lung volume is significantly smaller in ILD (3.8) and larger in COPD (7.2) than in controls (5.9, p<0.0001). Emphysema volume and index are significantly higher in COPD than in controls (3.2 vs. 0.5, p<0.0001, 45% vs. 8%, p<0.0001). MLD and 15{sup th} percentile are significantly smaller in COPD (-877/-985, p<0.0001) and significantly higher in ILD (-777, p<0.0006/-914, p<0.0001) than in controls (-829/-935). A relevant amount of COPD patients apparently do not suffer from emphysema, while controls who do not fulfil PFT criteria for COPD also demonstrate CT features of emphysema. Automatic quantification of thin-section CT delivers convincing parameters and ranges that are able to differentiate among emphysema, control and ILD. An emphysema index of lower 20%, MLD higher than -850, and 15{sup th} percentile lower than -950 might be regarded as normal (thin-section, nonenhanced, B40, YACTA). These ranges might be helpful in the judgement of individual measures. (orig.)

  4. Sipping test update device for fuel elements cladding inspections in IPR-r1 TRIGA reactor

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, R.R.; Mesquita, A.Z.; Andrade, E.P.D.; Gual, Maritza R., E-mail: rrr@cdtn.br, E-mail: amir@cdtn.br, E-mail: edson@cdtn.br, E-mail: maritzargual@gmail.com [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)

    2015-07-01

    It is in progress at the Centro de Desenvolvimento da Tecnologia Nuclear - CDTN (Nuclear Technology Development Center), a research project that aims to investigate possible leaks in the fuel elements of the TRIGA reactor, located in this research center. This paper presents the final form of sipping test device for TRIGA reactor, and results of the first experiments setup. Mechanical support strength tests were made by knotting device on the crane, charged with water from the conventional water supply, and tests outside the reactor pool with the use of new non-irradiated fuel elements encapsulated in stainless steel, and available safe stored in this unit. It is expected that tests with graphite elements from reactor pool are done soon after and also the test experiment with the first fuel elements in service positioned in the B ring (central ring) of the reactor core in the coming months. (author)

  5. Automatic Intelligent Fish Tank Cleaning Device Based on SCM Control Technology%基于单片机的全自动智能鱼缸清理器系统设计

    Institute of Scientific and Technical Information of China (English)

    冯雅莉; 郝宁生

    2015-01-01

    全自动智能鱼缸清理器系统的设计是采用STC系列单片机中AT89C52、步进电机滑台、定时系统和控制部分组成的。系统中含有2个步进滑台,分别代表直角坐标系中的横纵坐标轴。滑台的转轴上有一有转轴带动的金属块,代表清理器在鱼缸清洁轨道上的位置。其中,转轴是由步进滑台中的四相步进电机带动的。定时系统是由定时部分的DS1302芯片、测温部分18B20芯片和显示部分的液晶屏LCD1602组成。该系统可以实现人为定时清理鱼缸,过滤水体中异物,增氧以及遇故障时人为调整等功能。%The cleaning device consists four parts: AT89C52 of STC series, stepper motor slide unit, timing system and the controlling part. The STC contains a memory inside which the data can be repeatedly written and erased as well as a random access memory. There are two slide units in the device, standing for the x-axis and y-axis in rectangular coordinate system respectively. A shaft, powered by the four-phrase steeper motor is placed inside the slide unit. Rotated by the shaft a mental block, it indicates the position of the cleaning device in the fish tank. The timing system combines a chip DS1302 for timing, a chip 18B20 for temperature testing and a LCD screen LCD1602.The device is developed for multi-functions such as cleaning the tank automatically in specific time; removing the impurity in water; adding oxygen to the water and adjusting the position of the stepper motor intelligently when accident occurs.

  6. Investment Strategy for DoD Automatic Test Systems. Volume 1. Summary and Analyses

    Science.gov (United States)

    1994-01-01

    authors of this paper) the fol- lowing personnel from OSD, the Services, and IDA: Ms . Christine Fisher (DoD Chairper- son of the Study Team), Mr...Michael Bloom, Mr. Bill Darling, Mr. Steven Freschi, CMSgt Terry Lambert, Mr. Jonathan MacMillian, Mr. Wesley McElveen, Ms . Kate O’Sullivan, Mr. Bill Ross...were selected for this scenario. The scenario applied ATS mid-life additions (updates) to accommodate new F-15 C/D testing needs for the MTS, 0 MSIP

  7. Research on structural design and test technologies for a three-chamber launching device.

    Science.gov (United States)

    Jun, Wu; Qiushi, Yan; Ling, Xiao; Tieshuan, Zhuang; Chengyu, Yang

    2016-07-01

    A three-chamber launching device with improved acceleration is proposed and developed. As indicated by the damage generated during the pill and engineering protection tests, the proposed device is applicable as a high-speed launching platform for pills of different shapes and quality levels. Specifically, it can be used to investigate kinetic energy weapons and their highly destructive effects due to the resulting large bomb fragments. In the horizontal direction of the barrel, two auxiliary chambers are set at a certain distance from the main chamber. When the pill reaches the mouth of the auxiliary chambers, the charges in the auxiliary chambers are ignited by the high-temperature, high-pressure combustible gas trailing the pill. The combustible gas in the auxiliary chambers can resist the rear pressure of the pill and thus maintain the high pressure of the pill base. In this way, the required secondary acceleration of the pill is met. The proposed device features the advantage of launching a pill with high initial velocity under low bore pressure. Key techniques are proposed in the design of the device to address the problems related to the angle between the main chamber axis and the ancillary chamber axis, the overall design of a three-chamber barrel, the structural design of auxiliary propellant charge, the high-pressure combustible gas sealing technology, and the sabot and belt design. Results from the launching test verify the reasonable design of this device and its reliable structural sealing. Additionally, the stiffness and the strength of the barrel meet design requirements. Compared with the single-chamber launching device with the same caliber, the proposed device increases the average launching velocity by approximately 15% and the amount of muzzle kinetic energy by approximately 35%. Therefore, this equipment is capable of carrying out small-caliber, high-speed pill firing tests.

  8. Research on structural design and test technologies for a three-chamber launching device

    Science.gov (United States)

    Jun, Wu; Qiushi, Yan; Ling, Xiao; Tieshuan, Zhuang; Chengyu, Yang

    2016-07-01

    A three-chamber launching device with improved acceleration is proposed and developed. As indicated by the damage generated during the pill and engineering protection tests, the proposed device is applicable as a high-speed launching platform for pills of different shapes and quality levels. Specifically, it can be used to investigate kinetic energy weapons and their highly destructive effects due to the resulting large bomb fragments. In the horizontal direction of the barrel, two auxiliary chambers are set at a certain distance from the main chamber. When the pill reaches the mouth of the auxiliary chambers, the charges in the auxiliary chambers are ignited by the high-temperature, high-pressure combustible gas trailing the pill. The combustible gas in the auxiliary chambers can resist the rear pressure of the pill and thus maintain the high pressure of the pill base. In this way, the required secondary acceleration of the pill is met. The proposed device features the advantage of launching a pill with high initial velocity under low bore pressure. Key techniques are proposed in the design of the device to address the problems related to the angle between the main chamber axis and the ancillary chamber axis, the overall design of a three-chamber barrel, the structural design of auxiliary propellant charge, the high-pressure combustible gas sealing technology, and the sabot and belt design. Results from the launching test verify the reasonable design of this device and its reliable structural sealing. Additionally, the stiffness and the strength of the barrel meet design requirements. Compared with the single-chamber launching device with the same caliber, the proposed device increases the average launching velocity by approximately 15% and the amount of muzzle kinetic energy by approximately 35%. Therefore, this equipment is capable of carrying out small-caliber, high-speed pill firing tests.

  9. Production optimization of {sup 99}Mo/{sup 99m}Tc zirconium molybate gel generators at semi-automatic device: DISIGEG

    Energy Technology Data Exchange (ETDEWEB)

    Monroy-Guzman, F., E-mail: fabiola.monroy@inin.gob.mx [Instituto Nacional de Investigaciones Nucleares, Carretera Mexico-Toluca S/N, La Marquesa, Ocoyoacac, 52750, Estado de Mexico (Mexico); Rivero Gutierrez, T., E-mail: tonatiuh.rivero@inin.gob.mx [Instituto Nacional de Investigaciones Nucleares, Carretera Mexico-Toluca S/N, La Marquesa, Ocoyoacac, 52750, Estado de Mexico (Mexico); Lopez Malpica, I.Z.; Hernandez Cortes, S.; Rojas Nava, P.; Vazquez Maldonado, J.C. [Instituto Nacional de Investigaciones Nucleares, Carretera Mexico-Toluca S/N, La Marquesa, Ocoyoacac, 52750, Estado de Mexico (Mexico); Vazquez, A. [Instituto Mexicano del Petroleo, Eje Central Norte Lazaro Cardenas 152, Col. San Bartolo Atepehuacan, 07730, Mexico D.F. (Mexico)

    2012-01-15

    DISIGEG is a synthesis installation of zirconium {sup 99}Mo-molybdate gels for {sup 99}Mo/{sup 99m}Tc generator production, which has been designed, built and installed at the ININ. The device consists of a synthesis reactor and five systems controlled via keyboard: (1) raw material access, (2) chemical air stirring, (3) gel dried by air and infrared heating, (4) moisture removal and (5) gel extraction. DISIGEG operation is described and dried condition effects of zirconium {sup 99}Mo- molybdate gels on {sup 99}Mo/{sup 99m}Tc generator performance were evaluated as well as some physical-chemical properties of these gels. The results reveal that temperature, time and air flow applied during the drying process directly affects zirconium {sup 99}Mo-molybdate gel generator performance. All gels prepared have a similar chemical structure probably constituted by three-dimensional network, based on zirconium pentagonal bipyramids and molybdenum octahedral. Basic structural variations cause a change in gel porosity and permeability, favouring or inhibiting {sup 99m}TcO{sub 4}{sup -} diffusion into the matrix. The {sup 99m}TcO{sub 4}{sup -} eluates produced by {sup 99}Mo/{sup 99m}Tc zirconium {sup 99}Mo-molybdate gel generators prepared in DISIGEG, air dried at 80 Degree-Sign C for 5 h and using an air flow of 90 mm, satisfied all the Pharmacopoeias regulations: {sup 99m}Tc yield between 70-75%, {sup 99}Mo breakthrough less than 3 Multiplication-Sign 10{sup -3}%, radiochemical purities about 97% sterile and pyrogen-free eluates with a pH of 6. - Highlights: Black-Right-Pointing-Pointer {sup 99}Mo/{sup 99m}Tc generators based on {sup 99}Mo-molybdate gels were synthesized at a semi-automatic device. Black-Right-Pointing-Pointer Generator performances depend on synthesis conditions of the zirconium {sup 99}Mo-molybdate gel. Black-Right-Pointing-Pointer {sup 99m}TcO{sub 4}{sup -} diffusion and yield into generator depends on gel porosity and permeability. Black

  10. 10 CFR 431.134 - Uniform test methods for the measurement of energy consumption and water consumption of automatic...

    Science.gov (United States)

    2010-01-01

    ... consumption and water consumption of automatic commercial ice makers. 431.134 Section 431.134 Energy... of energy consumption and water consumption of automatic commercial ice makers. (a) Scope. This... consumption, but instead calculate the energy use rate (kWh/100 lbs Ice) by dividing the energy consumed...

  11. 基于VB.NET的无线电设备综合测试平台%Synthesis test bed for radio device based on VB.NET

    Institute of Scientific and Technical Information of China (English)

    王秀敏; 张燕; 毛兴鹏

    2012-01-01

    无线电设备的测试需要较多的专业知识,而且步骤繁琐.为简化无线电设备的测试过程和缩短测试时间,以VB.NET为基础研究了一种无线电设备综合测试平台.该平台能够自动控制各种无线电通信设备,实现各种参数的自动测量和处理,并自动完成数据的记录及报表的生成.使用该平台可以极大地简化人工操作的复杂度、缩短测量时间并进一步提高测试结果的准确性和权威性.%Professional knowledge is a precondition for testing radio devices and the process is so complicated. To simplify the process and shorten the time, a synthesis test bed for radio device is designed based on VB . NET. Utilizing the proposed test bed, all apparatus needed for test are connected, and every parameter is measured and processed automatically, before data recording and reports building. By utilizing the test bed proposed, the complexity of operating is simplified, the measure time is shortea The veracity and the authority of the test result is improved further.

  12. Flight test results for the Digital Integrated Automatic Landing Systems (DIALS): A modern control full-state feedback design

    Science.gov (United States)

    Hueschen, R. M.

    1984-01-01

    The Digital Integrated Automatic Landing System (DIALS) is discussed. The DIALS is a modern control theory design performing all the maneuver modes associated with current autoland systems: localizer capture and track, glideslope capture and track, decrab, and flare. The DIALS is an integrated full-state feedback system which was designed using direct-digital methods. The DIALS uses standard aircraft sensors and the digital Microwave Landing System (MLS) signals as measurements. It consists of separately designed longitudinal and lateral channels although some cross-coupling variables are fed between channels for improved state estimates and trajectory commands. The DIALS was implemented within the 16-bit fixed-point flight computers of the ATOPS research aircraft, a small twin jet commercial transport outfitted with a second research cockpit and a fly-by-wire system. The DIALS became the first modern control theory design to be successfully flight tested on a commercial-type aircraft. Flight tests were conducted in late 1981 using a wide coverage MLS on Runway 22 at Wallops Flight Center. All the modes were exercised including the capture and track of steep glidescopes up to 5 degrees.

  13. Power-aware testing and test strategies for low power devices

    CERN Document Server

    Girard, Patrick; Wen, Xiaoqing

    2010-01-01

    Power-aware testing methods for conventional circuits and systems are explored in this volume, while providing safe testing techniques without compromising reliability. State-of-the-art industrial practices are discusses, as well as EDA solutions.

  14. Combining PET images and neuropsychological test data for automatic diagnosis of Alzheimer's disease.

    Directory of Open Access Journals (Sweden)

    Fermín Segovia

    Full Text Available In recent years, several approaches to develop computer aided diagnosis (CAD systems for dementia have been proposed. Some of these systems analyze neurological brain images by means of machine learning algorithms in order to find the patterns that characterize the disorder, and a few combine several imaging modalities to improve the diagnostic accuracy. However, they usually do not use neuropsychological testing data in that analysis. The purpose of this work is to measure the advantages of using not only neuroimages as data source in CAD systems for dementia but also neuropsychological scores. To this aim, we compared the accuracy rates achieved by systems that use neuropsychological scores beside the imaging data in the classification step and systems that use only one of these data sources. In order to address the small sample size problem and facilitate the data combination, a dimensionality reduction step (implemented using three different algorithms was also applied on the imaging data. After each image is summarized in a reduced set of image features, the data sources were combined and classified using three different data combination approaches and a Support Vector Machine classifier. That way, by testing different dimensionality reduction methods and several data combination approaches, we aim not only highlighting the advantages of using neuropsychological scores in the classification, but also implementing the most accurate computer system for early dementia detention. The accuracy of the CAD systems were estimated using a database with records from 46 subjects, diagnosed with MCI or AD. A peak accuracy rate of 89% was obtained. In all cases the accuracy achieved using both, neuropsychological scores and imaging data, was substantially higher than the one obtained using only the imaging data.

  15. Device Design and Test of Fatigue Behaviour of Expansion Anchor Subjected to Tensile Loads

    Directory of Open Access Journals (Sweden)

    Zhang Jinfeng

    2016-01-01

    Full Text Available In order to study on the fatigue behaviour of expansion anchor (M16, grade 8.8 for overhead contact system in electrification railways, a set of safe, practical loading device is designed and a fatigue test campaign was carried out at structural laboratory of China Academy of Building Research on expansion anchor embedded in concrete block. The mobile frame of the loading device was designed well by finite-element simulation. According to some fatigue performance test of expansion anchor with different size and form, the device have been assessed experimentally its dependability. The results were found that no fatigue damage phenomenon occurred in all specimens after 2×106 cycles tensile fatigue test in this specific series. It shows that in the condition of medium level or slightly lower maximum stress limit and nominal stress range, expansion bolt has good fatigue resistance. The biggest relative displacement and the residual relative displacement after test (Δδ = δ2-δ1 was also strongly lower than the symbol of the fatigue test failure index of this specific series (0.5mm in the high cycle fatigue regime. The ultimate tension failures mode after fatigue tests in all tested samples take place in the concrete anchorage zone. The reduction range of the ultimate tensile strength properties of the anchorage system was not obvious, and the concrete was seen to be the weakest link of the system.

  16. Development and testing of new upper-limb prosthetic devices: Research designs for usability testing

    OpenAIRE

    Linda Resnik, PT, PhD, OCS

    2011-01-01

    The purposes of this article are to describe usability testing and introduce designs and methods of usability testing research as it relates to upper-limb prosthetics. This article defines usability, describes usability research, discusses research approaches to and designs for usability testing, and highlights a variety of methodological considerations, including sampling, sample size requirements, and usability metrics. Usability testing is compared with other types of study designs used in...

  17. Development and testing of new upper-limb prosthetic devices: Research designs for usability testing

    Directory of Open Access Journals (Sweden)

    Linda Resnik, PT, PhD, OCS

    2011-07-01

    Full Text Available The purposes of this article are to describe usability testing and introduce designs and methods of usability testing research as it relates to upper-limb prosthetics. This article defines usability, describes usability research, discusses research approaches to and designs for usability testing, and highlights a variety of methodological considerations, including sampling, sample size requirements, and usability metrics. Usability testing is compared with other types of study designs used in prosthetic research.

  18. 导弹自动测试系统闭环量传与溯源方法%Closed-loop System of Valuation Transfer and Traceability for Missile Automatic Test System

    Institute of Scientific and Technical Information of China (English)

    赵海鹰

    2014-01-01

    Based on the MAP theory,closed-loop system of valuation transfer and traceability are used to missile automatic test system by the transfer standard device for identifying the error of whole test system, and enhanced the calibration ability of missile ATS.%介绍了利用“传递标准”装置对测试系统各参数实施“闭环量传”,以确定测试系统整体参数相对于计量单位工作标准的偏差的方法,实现对测试系统整体参数的校准与评定。

  19. Manufacturing and testing flexible microfluidic devices with optical and electrical detection mechanisms

    NARCIS (Netherlands)

    Ivan, M.G.; Vivet, F.; Meinders, E.R.

    2010-01-01

    Flexible microfluidic devices made of poly(dimethylsiloxane) (PDMS) were manufactured by soft lithography, and tested in detection of ionic species using optical absorption spectroscopy and electrical measurements. PDMS was chosen due to its flexibility and ease of surface modification by exposure

  20. Development and Testing of an Integrated Sandia Cooler Thermoelectric Device (SCTD).

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, Terry A.; Staats, Wayne Lawrence,; Leick, Michael Thomas; Zimmerman, Mark D.; Radermacher, Reinhard; Martin, Cara; Nasuta, Dennis; Kalinowski, Paul; Hoffman, William

    2014-12-01

    This report describes a FY14 effort to develop an integrated Sandia Cooler T hermoelectric D evice (SCTD) . The project included a review of feasible thermoelectric (TE) cooling applications, baseline performance testing of an existing TE device, analysis and design development of an integrated SCTD assembly, and performance measurement and validation of the integrated SCTD prototype.

  1. Podcasts on Mobile Devices as a Read-Aloud Testing Accommodation in Middle School Science Assessment

    Science.gov (United States)

    McMahon, Don; Wright, Rachel; Cihak, David F.; Moore, Tara C.; Lamb, Richard

    2016-01-01

    The purpose of this study was to examine the effect of a digitized podcast to deliver read-aloud testing accommodations on mobile devices to students with disabilities and reading difficulties. The total sample for this study included 47 middle school students with reading difficulties. Of the 47 students, 16 were identified as students with…

  2. A Pull-in Based Test Mechanism for Device Diagnostic and Process Characterization

    NARCIS (Netherlands)

    Rocha, L.A.; Mol, L.; Cretu, E.; Wolffenbuttel, R.F.; Machado da Silva, J.

    2008-01-01

    A test technique for capacitive MEMS accelerometers and electrostatic microactuators, based on the measurement of pull-in voltages and resonance frequency, is described. Using this combination of measurements, one can estimate process-induced variations in the device layout dimensions as well as dev

  3. 16 CFR Figure 8 to Part 1512 - Reflectorized Bicycle Wheel Rim Abrasion Test Device

    Science.gov (United States)

    2010-01-01

    ... 16 Commercial Practices 2 2010-01-01 2010-01-01 false Reflectorized Bicycle Wheel Rim Abrasion... HAZARDOUS SUBSTANCES ACT REGULATIONS REQUIREMENTS FOR BICYCLES Pt. 1512, Fig. 8 Figure 8 to Part 1512—Reflectorized Bicycle Wheel Rim Abrasion Test Device EC03OC91.074...

  4. A Pull-in Based Test Mechanism for Device Diagnostic and Process Characterization

    NARCIS (Netherlands)

    Rocha, L.A.; Mol, L.; Cretu, E.; Wolffenbuttel, R.F.; Machado da Silva, J.

    2008-01-01

    A test technique for capacitive MEMS accelerometers and electrostatic microactuators, based on the measurement of pull-in voltages and resonance frequency, is described. Using this combination of measurements, one can estimate process-induced variations in the device layout dimensions as well as

  5. Endovascular Device Testing with Particle Image Velocimetry Enhances Undergraduate Biomedical Engineering Education

    Science.gov (United States)

    Nair, Priya; Ankeny, Casey J.; Ryan, Justin; Okcay, Murat; Frakes, David H.

    2016-01-01

    We investigated the use of a new system, HemoFlow™, which utilizes state of the art technologies such as particle image velocimetry to test endovascular devices as part of an undergraduate biomedical engineering curriculum. Students deployed an endovascular stent into an anatomical model of a cerebral aneurysm and measured intra-aneurysmal flow…

  6. [Study on cytotoxicity tests of medical devices based on IC50].

    Science.gov (United States)

    Liu, Chenghu; Wu, Shifu; Hou, Li; Wang, Xin; Wang, Luanluan; Shi, Yanping

    2014-11-01

    To discuss IC50 application in cytotoxicity tests of medical devices, we firstly investigated the vibrating condition and endpoint of MTT method specified in ISO 10993-5: 2009. Furthermore, we demonstrated the application of IC50 in the result evaluation of MTT method. The experimental results show that usage of IC50 in quantitative evaluation of MTT method is feasible.

  7. A simple device to inject indicator gas for wash-out tests during mechanical ventilation

    NARCIS (Netherlands)

    I. Gultuna; P.E.M. Huygen; C. Jabaaij (C.); W.P. Holland (Wim); C. Ince (Can); H.A. Bruining (Hajo)

    1992-01-01

    textabstractObjective: To evaluate a simple device which injects a constant fraction of indicator gas to the inspiratory mixture for performing multi-breath wash-out tests during controlled ventilation. Design: the technique in which the indicator gas is injected at the mouth of the patient (post-mi

  8. Manufacturing and testing flexible microfluidic devices with optical and electrical detection mechanisms

    NARCIS (Netherlands)

    Ivan, M.G.; Vivet, F.; Meinders, E.R.

    2010-01-01

    Flexible microfluidic devices made of poly(dimethylsiloxane) (PDMS) were manufactured by soft lithography, and tested in detection of ionic species using optical absorption spectroscopy and electrical measurements. PDMS was chosen due to its flexibility and ease of surface modification by exposure t

  9. Results from tests of the system for automatically controlling frequency and power of the PGU-450 power unit at the kaliningrad TETs-2 cogeneration station

    Science.gov (United States)

    Bilenko, V. A.; Manevskaya, O. A.; Melamed, A. D.

    2008-10-01

    The structure of the system and the results of tests for checking the preparedness of the power unit for common primary control of the network frequency are described. An analysis of the results is presented, and an assessment is made of whether the PGU-450 unit can participate in selective primary and automatic secondary control of frequency and power.

  10. Automatic system for blood donors control with seropositive results in epidemiological tests.

    Directory of Open Access Journals (Sweden)

    Ariel Menéndez Barrios

    2008-04-01

    Full Text Available Background: Prevention of infectious diseases transmission through blood transfusion is one of the biggest challenges in the transfusion field of medicine. Objective: to design a computerized system for blood donors control with seropositive results in epidemiological tests. Methods: A system designed by the Provincial Blood Bank using Microsoft Access as a data base system and DELFHI 7 as associated language. It runs under Windows 2000 or any other superior system with 64 RAM and do not need special requirements of software or hardware. It includes the following data: Full name, age, sex, race, Id number, home address, number of the clinical record in the blood bank, date when the trial took place in each patient, kind of disease diagnosed, technical data of the trial such as: fluorescence, sectional level of the 1st trial as well as the repetition, name of the technician who performed it. Results: It permits to consult general data of donors as well as the disease diagnosed. It also permits to elaborate reports of these patients from any PC of the blood bank acceding with the security password of the program. Conclusions: It constitutes a beneficial tool which permits to improve the notification system established in the program of the web about sexually transmitted diseases from the Minister of Public Health in Cuba.

  11. Field test of a novel detection device for Mycobacterium tuberculosis antigen in cough

    Directory of Open Access Journals (Sweden)

    Tesfaye Ato

    2010-06-01

    Full Text Available Abstract Background Tuberculosis is a highly infectious disease that is spread from person to person by infected aerosols emitted by patients with respiratory forms of the disease. We describe a novel device that utilizes immunosensor and bio-optical technology to detect M. tuberculosis antigen (Ag85B in cough and demonstrate its use under field conditions during a pilot study in an area of high TB incidence. Methods The TB Breathalyzer device (Rapid Biosensor Systems Ltd was field tested in the outpatient clinic of Adama Hospital, Ethiopia. Adults seeking diagnosis for respiratory complaints were tested. Following nebulization with 0.9% saline patients were asked to cough into a disposable collection device where cough aerosols were deposited. Devices were then inserted into a portable instrument to assess whether antigen was present in the sample. Demographic and clinical data were recorded and all patients were subjected to chest radiogram and examination of sputum by Ziehl-Nielsen microscopy. In the absence of culture treatment decisions were based on smear microscopy, chest x-ray and clinical assessment. Breathalyzer testing was undertaken by a separate physician to triage and diagnostic assessment. Results Sixty individuals were each subjected to a breathalyzer test. The procedure was well tolerated and for each patient the testing was completed in less than 10 min. Positive breath test results were recorded for 29 (48% patients. Of 31 patients with a diagnosis of tuberculosis 23 (74%; 95% CI 55-87 were found positive for antigen in their breath and 20 (64%; 95% CI 45-80 were smear positive for acid fast bacilli in their sputum. Six patients provided apparent false positive breathalyzer results that did not correlate with a diagnosis of tuberculosis. Conclusions We propose that the breathalyzer device described warrants further investigation as a tool for studying exhalation of M. tuberculosis. The portability, simplicity of use and speed

  12. Calibration of an automated California mastitis test with focus on the device-dependent variation

    OpenAIRE

    Neitzel, Anne-Christin; Stamer, Eckhard; Junge, Wolfgang; Thaller, Georg

    2014-01-01

    The aim of the paper was to estimate the accuracy of the metrology of an installed indirect on-line sensor system based on the automated California Mastitis Test (CMT) with focus on the prior established device-dependent variation. A sensor calibration was implemented. Therefore, seven sensors were tested with similar trials on the dairy research farm Karkendamm (Germany) on two days in July 2011 and January 2012. Thereby, 18 mixed milk samples from serial dilutions were fourfold recorded at ...

  13. TO EVALUATION TEST OF QUALITY OF MAGNETIC FLUIDS FOR MAGNETOFLUID DEVICES

    Directory of Open Access Journals (Sweden)

    V. G. Bashtovoi

    2016-01-01

    Full Text Available Magnetic fluid is a colloid of magnetic nanoparticles. Using of magnetic fluids in technical devices demands applying of strong non-uniform magnetic fields for a long time. One of the most widespread magnetic fluid devices are magnetic fluid seals of mobile shafts, magnetic fluid supports, bearings, acceleration and angle of inclination gauges, devices for information input in the computer and etc. These devices demand high quality of used fluids. Processes of magnetophoresis and Brownian diffusion in magnetic fluid lead to concentration of magnetic particles in the areas with higher intensity of magnetic field and increase of fluid magnetization in these areas. A local change of particles concentration in the fluid leads to variation of its physical properties. Formation of aggregates from the particles and the further stratification of magnetic fluid, up to its destruction, may be the most serious consequence of redistribution of concentration of magnetic particles. These factors lead to variation of parameters of magnetic fluid devices; cause disturbance of their normal operation and even failure. Therefore, the consistent, high quality magnetic fluids which are not subject to fast stratification in a non-uniform magnetic field are necessary for effective work of the devices. The procedure of evaluation test of quality of magnetic fluids is proposed in this paper. The test is based on studying of influence of processes of magnetophoresis and Brownian diffusion of magnetic particles in magnetic fluid on the forces acting on the volume of fluid in an external non-uniform magnetic field. The procedure is developed on the basis of analysis of magnetic force variation in time under the action of non-uniform field of permanent magnets. Methods of determination of stability of magnetic fluid, known at present, demand rather complicated equipment and laborious and complex investigations. Proposed procedure can be used as an express method for

  14. Comparison Between THOR Anthropomorphic Test Device and THOR Finite Element Model

    Science.gov (United States)

    Moore, Erik

    2014-01-01

    Extended time spent in reduced gravity can cause physiologic deconditioning of astronauts, reducing their ability to sustain excessive forces during dynamic phases of spaceflight such as landing. To make certain that the crew is safe during these phases, NASA must take caution when determining what types of landings are acceptable based on the accelerations applied to the astronaut. In order to test acceptable landings, various trials have been run accelerating humans, cadavers, and Anthropomorphic Test Devices (ATDs), or crash test dummies, at different acceleration and velocity rates on a sled testing platform. Using these tests, risks of injury will be created and metrics will be developed for the likelihood of injuries due to the acceleration. A finite element model (FEM) of the Test Device for Human Occupant Restraint (THOR) ATD has been developed that can simulate these test trials and others (Putnam, 2014), reducing the need for human and ATD testing. Additionally, this will give researchers a more effective way to test the accelerations and orientations encountered during spaceflight landings during design of new space vehicles for crewed missions. However, the FEM has not been proven and must be validated by comparing the forces, accelerations, and other measurements of all parts of the body between the physical tests already completed and computer simulated trials. The purpose of my research was to validate the FEM for the ATD using previously run trials with the physical THOR ATD.

  15. Design and experiment of automatic reseeding device for miss-seeding of crops with large grain%大籽粒作物漏播自补种装置设计与试验

    Institute of Scientific and Technical Information of China (English)

    朱瑞祥; 葛世强; 翟长远; 闫小丽; 史岩鹏; 李成鑫; 黄闪闪

    2014-01-01

    The loss sowing phenomenon is common for sowers for crops with large grain. Reseeding and seed-metering devices now available are independent of each other. This method has some problems such as reseeding inaccurately. In order to solve these problems, an automatic reseeding method based on an overrunning clutch was proposed in this paper. An automatic reseeding device that was composed of both a reseeding device and a seed-metering device was designed. The device adopted a hall sensor to get the speed of the seed-metering device. The hall sensor got the time interval between every two seed spoons of the seed-metering device to calculate the real-time speed of the seed-metering device. A laser sensor was used to monitor the loss of seeds. Seeds in the plate of the seed-metering device could block the light propagation path of the laser. If the light propagation path of the laser was not blocked, the seed was lost. An overrunning clutch was used to connect a step motor and the axle of the seed-metering device. The step motor was used to drive the seed-metering device to reseed with high speed. The overrunning clutch is a kind of compound function bearing which transmits torque between the inside hub and outside hub in one direction and allows free overrun in the opposite direction. It was used to switch torque source between the wheels of the seed-metering device and the step motor. The torque source came from the wheels of the seed-metering device when seeding but from the step motor when reseeding. When the laser sensor monitored the loss of seeds, the controller calculated the rotational speed and angle of the step motor based on the real-time speed of seeding and position of the missing seeds. The step motor drove the seed-metering device to reseed with a higher speed than seeding speed. The subsequent seed was added to the vacant position quickly. The system of the automatic reseeding device would give failure warnings to the user if the seed-metering device

  16. Analytical evaluation of four on-site oral fluid drug testing devices.

    Science.gov (United States)

    Vanstechelman, Sylvie; Isalberti, Cristina; Van der Linden, Trudy; Pil, Kristof; Legrand, Sara-Ann; Verstraete, Alain G

    2012-03-01

    The use of oral fluid (OF) as an alternative matrix for the detection of drugs of abuse has increased over the last decade, leading to the need for a rapid, simple, and reliable on-site OF testing device. Four on-site OF drug testing devices (Dräger DrugTest 5000, Cozart DDS, Mavand Rapid STAT, and Innovacon OrAlert) were evaluated on 408 volunteers at drug treatment centers. UPLC-MS-MS results were used as reference to determine sensitivity, specificity and accuracy for each device, applying Belgian legal confirmation cutoffs for benzoylecgonine, cocaine, and THC (10 ng/mL); morphine and 6-acetylmorphine (5 ng/mL); and amphetamine and 3,4-methylenedioxymethylamphetamine (25 ng/mL). Sensitivity for cocaine was 50%, 50%, 27%, and 11% for DrugTest, OrAlert, Rapid STAT, and DDS 806, respectively. For opiates, sensitivities were 84%, 73%, 77%, and 65%, respectively. For THC, the sensitivities were 81%, 23%, 43%, and 28%, respectively. For amphetamines, the sensitivities were 75%, 33%, 17%, and 67%, respectively. Specificity was >88% for opiates and THC, > 90% for amphetamines, and > 97% for cocaine. All tests showed good specificity. DrugTest had the highest sensitivity, although it was still low for some analytes.

  17. Analysis the causes of suspicious results for BECKMAN PK 7300 automatic blood inspection device%BECKM AN PK7300全自动血型检测系统可疑结果的原因分析

    Institute of Scientific and Technical Information of China (English)

    刘淼; 王霞; 潘彤

    2016-01-01

    目的:探讨BECKMAN PK7300全自动血型检测系统在血站实验室用于血型筛查时出现结果可疑的原因以及应用中的注意事项。方法选取天津市血液中心2015年5月至2015年8月ABO及Rh血型经微板法鉴定后的无偿献血者的标本14417例,再由PK7300进行检测,统计分析ABO及Rh血型结果判读的正确率、错误率以及对可疑结果的原因进行分析。结果ABO血型结果一次性判读正确率为99.01%,失败率0.99%(其中正反定型不符0.48%),无错误判读;Rh(D)血型正确判读率100%。结论 BECKMAN PK7300全自动血型检测系统结果准确可靠,实现了血型检测的自动化、标准化,减少人为因素对实验的影响,反应图像可长期保存,保证结果的可溯性,节约成本,适用于血站实验室血型批量化检测需要。%Objective To investigate the causes of suspicious results for BECKMAN PK 7300 automatic blood inspection device on blood typing in blood station and the application notes .Methods A total of 11417 samples from unpaid blood donors were re‐cruited from Tianjin Blood Center between May 2015 and August 2015 .Microplate assay was applied in ABO and Rh(D)blood typ‐ing .All the samples were tested by BECKMAN PK7300 automatic blood inspection device .The accuracy and error rates were calcu‐lated for ABO and Rh(D)blood group and causes of suspicious results were analyzed .Results The accuracy and failure rate of ABO blood group were 99 .01% and 0 .99% (of which the inconsistent rate of positive and reverse ABO blood typing was 0 .48% )and there was no false reading .Its accuracy was 100% in Rh(D)blood grouping .Conclusion The results of BECKMAN PK7300 auto‐matic blood inspection device were accurate and reliable .The whole system achieved automation and standardization and reduced the artificial factors for experiments ,which images could be saved for a long period of time ,saving the cost .The

  18. TBI Assessment of Readiness Using a Gait Evaluation Test (TARGET): Development of a Portable mTBI Screening Device

    Science.gov (United States)

    2016-05-01

    Evaluation Test (TARGET): Development of a Portable mTBI Screening Device 5a. CONTRACT NUMBER 5b. GRANT NUMBER W81XWH-15-1-0094 5c. PROGRAM ...determine the validity and reliability of an Android device-based mTBI (mild traumatic brain injury) screening test app for assessing motor function. The...deployment. This study seeks to determine the validity and reliability of an Android device-based mTBI (mild traumatic brain injury) screening test app

  19. Automatic Test System of Model 9016 Ethernet Intelligent Pressure Scanner%9016型电子压力扫描阀自动化检定系统

    Institute of Scientific and Technical Information of China (English)

    涂斌

    2014-01-01

    介绍了9016型电子压力扫描阀自动化检定系统的组成、功能、实现方法以及软件系统的结构和设计思路。该检定系统是基于Visual Basic 6.0编写,并通过GPIB卡和网卡实现仪器之间的通信,自动完成数据采集、数据处理及生成记录和证书。该检定系统实用、高效、稳定。%The automatic testing system of the Model 9016 Ethernet Intelligent Pressure Scanner is introduced. The component, function, realization of the automatic system and the structure and design thought of the software system are also introduced. The software of the automatic system was written in Visual Basic 6.0. And the software communicates with the instruments via GPIB interface and Local Area Network. The au-tomatic testing system can handle the data and build up the document voluntarily. The testing system is practical, efficient and reliable.

  20. All-optical automatic pollen identification: Towards an operational system

    Science.gov (United States)

    Crouzy, Benoît; Stella, Michelle; Konzelmann, Thomas; Calpini, Bertrand; Clot, Bernard

    2016-09-01

    We present results from the development and validation campaign of an optical pollen monitoring method based on time-resolved scattering and fluorescence. Focus is first set on supervised learning algorithms for pollen-taxa identification and on the determination of aerosol properties (particle size and shape). The identification capability provides a basis for a pre-operational automatic pollen season monitoring performed in parallel to manual reference measurements (Hirst-type volumetric samplers). Airborne concentrations obtained from the automatic system are compatible with those from the manual method regarding total pollen and the automatic device provides real-time data reliably (one week interruption over five months). In addition, although the calibration dataset still needs to be completed, we are able to follow the grass pollen season. The high sampling from the automatic device allows to go beyond the commonly-presented daily values and we obtain statistically significant hourly concentrations. Finally, we discuss remaining challenges for obtaining an operational automatic monitoring system and how the generic validation environment developed for the present campaign could be used for further tests of automatic pollen monitoring devices.

  1. Automatic sequences

    CERN Document Server

    Haeseler, Friedrich

    2003-01-01

    Automatic sequences are sequences which are produced by a finite automaton. Although they are not random they may look as being random. They are complicated, in the sense of not being not ultimately periodic, they may look rather complicated, in the sense that it may not be easy to name the rule by which the sequence is generated, however there exists a rule which generates the sequence. The concept automatic sequences has special applications in algebra, number theory, finite automata and formal languages, combinatorics on words. The text deals with different aspects of automatic sequences, in particular:· a general introduction to automatic sequences· the basic (combinatorial) properties of automatic sequences· the algebraic approach to automatic sequences· geometric objects related to automatic sequences.

  2. Intelligent Information Retrieval: Part IV. Testing the Timing of Two Information Retrieval Devices in a Naturalistic Setting.

    Science.gov (United States)

    Cole, Charles

    2001-01-01

    Reports the results of two studies of undergraduates that tested an uncertainty expansion information retrieval device and an uncertainty reduction device in naturalistic settings, designed to be given at different stages of Kuhlthau's information search process. Concludes that the timing of the device interventions is crucial to their potential…

  3. A new cryogenic test facility for large superconducting devices at CERN

    CERN Document Server

    Perin, A; Serio, L; Stewart, L; Benda, V; Bremer, J; Pirotte, O

    2015-01-01

    To expand CERN testing capability to superconducting devices that cannot be installed in existing test facilities because of their size and/or mass, CERN is building a new cryogenic test facility for large and heavy devices. The first devices to be tested in the facility will be the S-FRS superconducting magnets for the FAIR project that is currently under construction at the GSI Research Center in Darmstadt, Germany. The facility will include a renovated cold box with 1.2 kW at 4.5 K equivalent power with its compression system, two independent 15 kW liquid nitrogen precooling and warm-up units, as well as a dedicated cryogenic distribution system providing cooling power to three independent test benches. The article presents the main input parameters and constraints used to define the cryogenic system and its infrastructure. The chosen layout and configuration of the facility is presented and the characteristics of the main components are described.

  4. A test device for isotopic γ-ray imaging with CdZnTe detector

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    A test device for isotopic γ-ray imaging, which consists of an isotope γ-ray source, a CdZnTe γ-ray spectrometer and other auxiliary equipment, is studied here. Compared with the conventional X-ray, the isotope γ-ray,which is utilized in this project, has its own advantages in imaging. Furthermore, with a room-temperature high-energy-resolution CdZnTe detector and a modern imaging processing technique, this device is capable of effectively suppressing the background and gaining more information, thus it can obtain a better image than conventional X-ray devices. In the experiment of PCB imaging, all soldered points and chip components are sharply demonstrated.

  5. Assessment And Testing of Industrial Devices Robustness Against Cyber Security Attacks

    CERN Document Server

    Tilaro, F

    2011-01-01

    CERN (European Organization for Nuclear Research),like any organization, needs to achieve the conflicting objectives of connecting its operational network to Internet while at the same time keeping its industrial control systems secure from external and internal cyber attacks. With this in mind, the ISA-99[0F1] international cyber security standard has been adopted at CERN as a reference model to define a set of guidelines and security robustness criteria applicable to any network device. Devices robustness represents a key link in the defense-in-depth concept as some attacks will inevitably penetrate security boundaries and thus require further protection measures. When assessing the cyber security robustness of devices we have singled out control system-relevant attack patterns derived from the well-known CAPEC[1F2] classification. Once a vulnerability is identified, it needs to be documented, prioritized and reproduced at will in a dedicated test environment for debugging purposes. CERN - in collaboration ...

  6. Influence of heavy ion flux on single event effect testing in memory devices

    Science.gov (United States)

    Luo, Jie; Liu, Jie; Sun, Youmei; Hou, Mingdong; Xi, Kai; Liu, Tianqi; Wang, Bin; Ye, Bing

    2017-09-01

    The natural space presents a particle flux variable environment and choosing a suitable flux value for ground-based single event experiments is an unresolved problem so far. In this work, various types of memory devices have been tested over the ion flux range from 10 to 105 ions/(cm2·s) using different ions covering LET from 10.1 to 99.8 MeV·cm2/mg. It was found that for most devices the error rates of single event upsets are affected by the applied flux value. And the effect involving flux becomes prominent as it is increased above 103 ions/(cm2·s). Different devices behave differently as the flux is increased and the flux effect depends strongly on the LET of the impinging ions. The results concluded in this experiment are discussed in detail and recommendations for choosing appropriate experimental flux are given.

  7. 基于太阳能的微灌系统恒压供水自动控制装置研制%Constant pressure water supply automatic device designed for micro-irrigation system based on solar energy

    Institute of Scientific and Technical Information of China (English)

    李加念; 洪添胜; 倪慧娜

    2013-01-01

      The stability of micro-irrigation system inlet water pressure affects the uniformity of the micro-irrigation and the mixed fertilizer accuracy of automatic fertilizer mixing device. In order to provide a constant inlet water pressure for small and medium-sized irrigation pipe network which adopts gravity drip irrigation, a constant pressure water supply automatic control device was developed, through employing a diaphragm pump DP-60 powered by solar energy to carry water to the reservoir built in high place, and maintaining the reservoir’ water level at a fixed height in the drip irrigation process. The water level was detected online by using a level sensor YZ-YO-LAG1, and the controller control DP-60 carrying water to the reservoir according to the water level detected. Due to the certain distance between reservoir water level detection terminal and DP-60 control terminal, two wireless communication modules CC1100 were installed in each terminal respectively to realize wireless data transmission and control between two terminals. To reduce power consumption of wireless communication, a regular communication strategy combining with sleeping mechanism was adopted, and a kind of time synchronization technology was employed to keep time synchronization between the communication parties, and the WOR (wake on radio) mode of CC1100 module was enabled while communicating, the communication success rate was 100%verified by practical test. Photovoltaic capacity of the system had been designed for obtaining an optimal capacity combination of solar cell array and lead-acid battery, and the solar panel power was determined to be 60 W and the battery capacity to be 60 A·h, the capacity combination could meet the electricity demand of 500L irrigation norm for each drip irrigation cycle, and ensure that the system operates normally in seven consecutive days without sunshine. In order to maximize the use of solar energy, the relationship between solar panel power and the

  8. Fabrication and test of digital output interface devices for gas turbine electronic controls

    Science.gov (United States)

    Newirth, D. M.; Koenig, E. W.

    1978-01-01

    A program was conducted to develop an innovative digital output interface device, a digital effector with optical feedback of the fuel metering valve position, for future electronic controls for gas turbine engines. A digital effector (on-off solenoids driven directly by on-off signals from a digital electronic controller) with optical position feedback was fabricated, coupled with the fuel metering valve, and tested under simulated engine operating conditions. The testing indicated that a digital effector with optical position feedback is a suitable candidate, with proper development for future digital electronic gas turbine controls. The testing also identified several problem areas which would have to be overcome in a final production configuration.

  9. A novel nanoscratch device compatible with commercial microscope for in situ tests of materials’ mechanics

    Directory of Open Access Journals (Sweden)

    Ning Li

    2016-04-01

    Full Text Available For exploring the mechanical properties and behaviors of new materials, a novel in situ nanoscratch device compatible with commercial microscope has been developed. The developed device with specific dimensions of 178 mm × 165 mm × 78 mm includes the coarse positioning module, the precise feed module, the measurement module, and the control module. Integrating the servo motor, worm and gears, ball screw, flexure hinge, and piezoelectric actuator, the device can realize macroscopical coarse positioning motion and precise feed motion. A novel arrangement of load sensor and indenter with no middle chain is used to reduce the measurement error. Closed-loop control system is established to guarantee the accuracy of load and displacement control. Mechanical properties of the developed device have been proved by calibrating the load sensor, finite element analysis of flexure hinge, and verifying the output performance. The in situ nanoscratch test has been conducted on the single crystal copper. The captured images and finite element analysis prove the feasibility and accuracy of the developed device.

  10. Testing devices for the prevention and treatment of stroke and its complications.

    Science.gov (United States)

    Bath, Philip M; Brainin, Michael; Brown, Chloe; Campbell, Bruce; Davis, Stephen M; Donnan, Geoffrey A; Ford, Gary A; Hacke, Werner; Iglesias, Cynthia; Lees, Kennedy R; Pugh, Stacey S; Saver, Jeff L; Schellinger, Peter D; Truelsen, Thomas

    2014-08-01

    We are entering a challenging but exciting period when many new interventions may appear for stroke based on the use of devices. Hopefully these will lead to improved outcomes at a cost that can be afforded in most parts of the world. Nevertheless, it is vital that lessons are learnt from failures in the development of pharmacological interventions (and from some early device studies), including inadequate preclinical testing, suboptimal trial design and analysis, and underpowered studies. The device industry is far more disparate than that seen for pharmaceuticals; companies are very variable in size and experience in stroke, and are developing interventions across a wide range of stroke treatment and prevention. It is vital that companies work together where sales and marketing are not involved, including in understanding basic stroke mechanisms, prospective systematic reviews, and education of physicians. Where possible, industry and academics should also work closely together to ensure trials are designed to be relevant to patient care and outcomes. Additionally, regulation of the device industry lags behind that for pharmaceuticals, and it is critical that new interventions are shown to be safe and effective rather than just feasible. Phase IV postmarketing surveillance studies will also be needed to ensure that devices are safe when used in the 'real-world' and to pick up uncommon adverse events.

  11. 增压器全液压自动换向装置及其计算方法%The full-hydraulic automatic reversing device for booster and its calculation methods

    Institute of Scientific and Technical Information of China (English)

    王兴洲; 徐超; 何永森

    2001-01-01

    In order to research into more novel and reliable full-hydraulic automatic reversing device for booster and the methods of parameters calculation related to the reversal frequency of booster, on the basis of discussing super high pressure water jet generators, including the working principle of booster, and making an all-round analysis of the automatic reversing devices for all types of boosters at home and abroad, a classification method of existent automatic reversing device for boosters is put forward. This classification method is definite in concept and helpful to specify the design of thistype devices. A full-hydraulic automatic revesing device, which has many advantages such as specific structure, simplified system, lower noise level, less faults, and so on, is proposed. The experiment has shown that the calculation and the new device used in the design of water jet cutting machines have simplified the structure of water jet generators and improved their reliability. It plays a positive and impellent role in improving the quality of super high pressure water jet cutting machines and in the development of water jet cutting technology.%为了研究更为新颖可靠的增压器全液压自动换向装置和与增压器换向频率有关的参数计算方法,对超高压水射流发生器及增压器的工作原理进行了分析,研制了1种对现行增压器自动换向装置的分类方法及具有结构独特、系统简单、机械噪音小、故障率低等优点的全液压自动换向装置.实验结果表明:该分类方法概念明确,有利于规范此类装置的设计;将计算方法和新装置应用于水射流切割机产品的设计中,简化了水射流发生器结构,提高了其工作的可靠性,对提高超高压水射流切割机产品质量和促进水射流切割技术的发展起到了积极的推动作用.

  12. Development of a semi-automatic segmentation method for retinal OCT images tested in patients with diabetic macular edema.

    Directory of Open Access Journals (Sweden)

    Yijun Huang

    Full Text Available PURPOSE: To develop EdgeSelect, a semi-automatic method for the segmentation of retinal layers in spectral domain optical coherence tomography images, and to compare the segmentation results with a manual method. METHODS: SD-OCT (Heidelberg Spectralis scans of 28 eyes (24 patients with diabetic macular edema and 4 normal subjects were imported into a customized MATLAB application, and were manually segmented by three graders at the layers corresponding to the inner limiting membrane (ILM, the inner segment/ellipsoid interface (ISe, the retinal/retinal pigment epithelium interface (RPE, and the Bruch's membrane (BM. The scans were then segmented independently by the same graders using EdgeSelect, a semi-automated method allowing the graders to guide/correct the layer segmentation interactively. The inter-grader reproducibility and agreement in locating the layer positions between the manual and EdgeSelect methods were assessed and compared using the Wilcoxon signed rank test. RESULTS: The inter-grader reproducibility using the EdgeSelect method for retinal layers varied from 0.15 to 1.21 µm, smaller than those using the manual method (3.36-6.43 µm. The Wilcoxon test indicated the EdgeSelect method had significantly better reproducibility than the manual method. The agreement between the manual and EdgeSelect methods in locating retinal layers ranged from 0.08 to 1.32 µm. There were small differences between the two methods in locating the ILM (p = 0.012 and BM layers (p<0.001, but these were statistically indistinguishable in locating the ISe (p = 0.896 and RPE layers (p = 0.771. CONCLUSIONS: The EdgeSelect method resulted in better reproducibility and good agreement with a manual method in a set of eyes of normal subjects and with retinal disease, suggesting that this approach is feasible for OCT image analysis in clinical trials.

  13. Model-based testing with UML applied to a roaming algorithm for Bluetooth devices

    Institute of Scientific and Technical Information of China (English)

    DAI Zhen Ru; GRABOWSKI Jens; NEUKIRCHEN Helmut; PALS Holger

    2004-01-01

    In late 2001,the Object Management Group issued a Request for Proposal to develop a testing profile for UML2.0. In June 2003,the work on the UML 2.0 Testing Profile was finally adopted by the OMG. Since March 2004,it has become an official standard of the OMG. The UML 2.0 Testing Profile provides support for UML based model-driven testing. This paper introduces a methodology on how to use the testing profile in order to modify and extend an existing UML design model for test issues. The application of the methodology will be explained by applying it to an existing UML Model for a Bluetooth device.

  14. Model-based testing with UML applied to a roaming algorithm for Bluetooth devices

    Institute of Scientific and Technical Information of China (English)

    DAIZhenRu; GRABOWSKIJens; NEUKIRCHENHelmut; PALSHolger

    2004-01-01

    In late 2001, the Object Management Group issued a Request for Proposal to develop a testing profile for UML 2.0. In June 2003, the work on the UML 2.0 Testing Profile was finally adopted by the OMG. Since March 2004, it has become an official standard of the OMG. The UML 2.0 Testing Profile provides support for UML based model-driven testing. This paper introduces a methodology on how to use the testing profile in order to modify and extend an existing UML design model for test issues. The application of the methodology will be explained by applying it to an existing UML Model for a Bluetooth device.

  15. Model-based testing with UML applied to a roaming algorithm for bluetooth devices.

    Science.gov (United States)

    Dai, Zhen Ru; Grabowski, Jens; Neukirchen, Helmut; Pals, Holger

    2004-11-01

    In late 2001, the Object Management Group issued a Request for Proposal to develop a testing profile for UML 2.0. In June 2003, the work on the UML 2.0 Testing Profile was finally adopted by the OMG. Since March 2004, it has become an official standard of the OMG. The UML 2.0 Testing Profile provides support for UML based model-driven testing. This paper introduces a methodology on how to use the testing profile in order to modify and extend an existing UML design model for test issues. The application of the methodology will be explained by applying it to an existing UML Model for a Bluetooth device.

  16. Automatic alignment device for focal spot measurements in the center of the field for mammography; Sistema automatico de alinhamento para avaliacao do ponto focal no centro do campo de equipamentos mamograficos

    Energy Technology Data Exchange (ETDEWEB)

    Vieira, Marcelo A.C.; Watanabe, Alex O.; Oliveira Junior, Paulo D.; Schiabel, Homero [Universidade de Sao Paulo (USP), Sao Carlos, SP (Brazil). Escola de Engenharia. Dept. de Engenharia Eletrica], e-mail: mvieira@sc.usp.br

    2010-03-15

    Some quality control procedures used for mammography, such as focal spot evaluation, requires previous alignment of the measurement equipment with the X-ray central beam. However, alignment procedures are, in general, the most difficult task and the one that needs more time to be performed. Moreover, the operator sometimes is exposed to radiation during this procedure. This work presents an automatic alignment system for mammographic equipment that allows locating the central ray of the radiation beam and, immediately, aligns with it by dislocating itself automatically along the field. The system consists on a bidirectional moving device, connected to a CCD sensor for digital radiographic image acquisition. A computational analysis of a radiographic image, acquired at any position on the field, is performed in order to determine its positioning under the X-ray beam. Finally, a mechanical system for two moving directions, electronically controlled by a microcontroller under USB communication, makes the system to align automatically with the radiation beam central ray. The alignment process is fully automatic, fast and accurate, with no operator exposure to radiation, which allows a considerable time saving for quality control procedures achievement for mammography. (author)

  17. 一种实现NGOSS分布式自动化测试的方法%A Method of Implementing Distributed Automatic Testing for NGOSS

    Institute of Scientific and Technical Information of China (English)

    张载龙; 王菊

    2011-01-01

    The Next Generation of Operations System and Software ( NGOSS) architecture and existing distributed automatic test methods are studied for testing NGOSS. A Distributed Automatic Testing scheme based-on STAF ( DATS) that aims at NGOSS characteristics is proposed through synthesizing existing dis-tributed automatic test methods, DATS uses STAF/STAX ( Software Test Automation Framework/STAf eXecution engine ) to achieve separating test cases and test framework, automatically distributing and exe-cuting test cases, monitoring run processes, and automatically collecting test results and logs. Finally the testing agencies send the results and logs to the controller, which are shown to the developers and testers. The method solves such problems as poor cross-platform, low expansibility, difficult software defect track and complicated log management, which exist in other test tools. The validity of this method is verified by prototype system.%为了测试复杂的新一代运营软件和系统(NGOSS),对NGOSS的体系架构和现有的分布式自动化测试方法进行了研究.针对NGOSS的特点,综合现有的分布式自动化测试方法理论,提出了一种适用于NGOSS的分布式自动化测试方法(DATS),该方法主要利用开源的软件测试自动化框架/执行引擎(STAF/STAX)实现测试用例与测试框架的分离,自动分发并执行测试用例,监控运行过程以及自动收集测试结果和日志,最后由测试代理机发送结果和日志到控制中心,显示给开发和测试人员.该方法解决了测试工具的跨平台性差、可扩展性低、软件缺陷追踪难及日志管理复杂等问题.通过原型系统验证了该方法的有效性.

  18. Automatic apparatus and data transmission for field response tests of the ground; Automatisation et teletransmission des donnees pour les tests de reponse du terrain

    Energy Technology Data Exchange (ETDEWEB)

    Laloui, L.; Steinmann, G.

    2004-07-01

    This is the report on the third part of a development started 1998 at the Swiss Federal Institute of Technology Lausanne (EPFL) in Lausanne, Switzerland. Energy piles are becoming increasingly used as a heat exchanger and heat storage device, as are geothermal probes. Their design and sizing is subject to some uncertainty due to the fact that the planner has to estimate the thermal and mechanical properties of the ground surrounding the piles or probes. The aim of the project was to develop an apparatus for field measurements of thermal and mechanical properties of an energy pile or a geothermal probe (thermal response tests). In the reported third phase of the project the portable apparatus was equipped with a data transmission device using the Internet. Real-time data acquisition and supervision is now implemented and data processing has been improved. Another goal of the project was to obtain the official accreditation of such response tests according to the European standard EN 45,000. First operation experience from a test in Lyon, France is reported.

  19. 自动控制原理网络考试系统设计%The Design on Online Test System on Automatic Control Principle

    Institute of Scientific and Technical Information of China (English)

    孟宁; 李涛

    2014-01-01

    该自动控制原理考试系统由管理员管理模块、考生在线考试模块两部分组成。系统基于B/S结构,采用ASP技术、ACCESS数据库等技术,实现了从题库自动组题、在线测试、自动判卷、成绩查询、考生管理、试题管理等功能。其特点是实现了考生身份认证、批量更新题库、显示曲线图如Bode图等功能。%This Design on Online Test System on Automatic Control Principle is composed of two parts named as administrator management module and students online test module. It is based on B/S structure using ASP technology, ACCESS database tech-nology to create the examinations from question bank automatically, online testing, automatic marking questions, query results, student management, and test management. Its characteristic is to realize Candidates authentication, batch update questions of the tests,display graph such as Bode plot.

  20. [Preliminary Study on Error Control of Medical Devices Test Reports Based on the Analytic Hierarchy Process].

    Science.gov (United States)

    Huang, Yanhong; Xu, Honglei; Tu, Rong; Zhang, Xu; Huang, Min

    2016-01-01

    In this paper, the common errors in medical devices test reports are classified and analyzed. And then the main 11 influence factors for these inspection report errors are summarized. The hierarchy model was also developed and verified by presentation data using MATLAB. The feasibility of comprehensive weights quantitative comparison has been analyzed by using the analytic hierarchy process. In the end, this paper porspects the further research direction.

  1. Eddy current nondestructive testing device for measuring variable characteristics of a sample utilizing Walsh functions

    Science.gov (United States)

    Libby, Hugo L.; Hildebrand, Bernard P.

    1978-01-01

    An eddy current testing device for measuring variable characteristics of a sample generates a signal which varies with variations in such characteristics. A signal expander samples at least a portion of this generated signal and expands the sampled signal on a selected basis of square waves or Walsh functions to produce a plurality of signal components representative of the sampled signal. A network combines these components to provide a display of at least one of the characteristics of the sample.

  2. Test and device to evaluate the capillary absorption in soil specimens of adobe and rammed earth

    OpenAIRE

    Cirvini, Silvia Augusta; Gomez Voltan, Jose Alejandro

    2016-01-01

    The moisture degree of capillary rise is an indicator of the state of conservation of earthen construction and their mechanical response to load cases, especially seismic action, since the buildings diminish resistant capacity where they are more demanding by the base shear. This paper shows a test procedure and a specific device to evaluate the rate of rise and variation of moisture content in samples of soil for use in new or existing walls of adobe and tapia. These parameters allow evalu...

  3. Podcasts on Mobile Devices as a Read-Aloud Testing Accommodation in Middle School Science Assessment

    Science.gov (United States)

    McMahon, Don; Wright, Rachel; Cihak, David F.; Moore, Tara C.; Lamb, Richard

    2016-04-01

    The purpose of this study was to examine the effect of a digitized podcast to deliver read-aloud testing accommodations on mobile devices to students with disabilities and reading difficulties. The total sample for this study included 47 middle school students with reading difficulties. Of the 47 students, 16 were identified as students with disabilities who received special education services. Participants were randomly assigned to three experimental testing conditions, standard administration, teacher-controlled read-aloud in traditional group delivery format, and student-controlled read-aloud delivered as a podcast and accessed on a mobile device, and given sample end-of-year science assessments. Based on a factorial analysis of variances, with test conditions and student status as the fixed factors, both student groups demonstrated statistically significant gains based on their testing conditions. Results support the use of podcast delivery as a viable alternative to the traditional teacher-delivered read-aloud test accommodation. Conclusions are discussed in the context of universal design for learning testing accommodations for future research and practice.

  4. Fabrication and testing of novel blood separation devices based on microchannel bend structures

    Science.gov (United States)

    Blattert, C.; Jurischka, R.; Schoth, A.; Kerth, P.; Menz, W.

    2005-02-01

    Most clinical chemistry tests are performed on cell-free serum or plasma. Therefore micro assay devices for blood tests require integrated on-chip microfluidics for separation of plasma or serum from blood. Polymers are ideally suited for these applications due to their material properties and their applicability for high volume production. These requirements are achieved by a new on-chip blood separation technique based on microchannel bend structures and a rapid processing technology for micro assay devices using injection molding or hot embossing. Different prototype polymer chips with channel dimensions down to 20 μm and aspect ratios of 4 have been fabricated by injection molding and hot embossing. The inserts for the molding tools were fabricated by an UV-LIGA technology. The separation efficiency of these chips has been tested with human blood samples. The results show different separation efficiencies up to 100 % for blood cells and plasma depending on microchannel geometry as well as cell concentration. As compared to present microfluidic devices for the separation of blood cells like filters, membranes or filtration by diffusion the microchannel bend is an integrated on-chip blood separation method. It combines the advantages of rapid separation times and a simple geometry that leads to cost-effective high volume production using injection molding.

  5. Fault-Tolerant Design and Testing of USB2.0 Peripheral Devices IP Core System

    Institute of Scientific and Technical Information of China (English)

    BAI Xiaoping; WEI Yuanfeng

    2007-01-01

    Universal serial bus 2.0 (USB2.0) is a kind of mainstream interface technology. The traditional USB developing is only to develop USB peripheral devices. For the USB2.0 peripheral devices IP core system that has wide application foreground, some interference inevitably exists in signal transmitting. Some fault-tolerant design and test methods must be adopted in order to correctly transmit and receive data. Combining with a project, this paper introduces in detail about measures, hardware implement, and test methods of fault-tolerant design about USB2.0 peripheral devices IP core system. Fault-tolerant design measures, noise reduction measures of signal processing, fault-tolerant methods about data encode and decode, package identification (ID) field fault-tolerant methods, and cyclic redundancy checks fault-tolerant methods are discussed. The paper also presents some hardware implement methods about fault-tolerant design of data decode and test methods about fault-tolerant design of USB2.0 IP core system. These methods can offer the reference for development of USB2.0 system in all kinds of electronics instrumentations.

  6. Wear of nanofilled dental composites in a newly-developed in vitro testing device

    Science.gov (United States)

    Lawson, Nathaniel C.

    Purpose. In vivo wear of dental composites can lead to loss of individual tooth function and the need to replace a composite restoration. To evaluate the wear performance of new and existing dental composites, we developed a novel system for measuring in vitro wear and we used this system to analyze the mechanisms of wear of nanofilled composite materials. Methods. A modified wear testing device was designed based on the Alabama wear testing machine. The new device consists of: (1) an antagonist which is lowered to and raised from the composite specimen by weight loading, (2) a motorized stage to cause the antagonist to slide 2mm on the composite surface, and (3) pumps for applying lubricant to the specimens. Various testing parameters of the device were examined before testing, including the impulse force, the third-body medium, the lubricant and antagonist. The parameters chosen for this study were 20N at 1Hz with a 33% glycerine lubricant and stainless steel antagonist. Three nano-composites were fabricated with a BisGMA polymer matrix and 40nm SiO2 filler particles at three filler loads (25%, 50% and 65%). The mechanical properties of the composites were measured. The materials were then tested in the modified wear testing device under impact wear, sliding wear and a combination of impact and sliding wear. The worn surfaces were then analyzed with a non-contact profilometer and SEM. Results. The volumetric wear data indicated that increasing filler content beyond 25% decreased the wear resistance of the composites. Increasing filler content increased hardness and decreased toughness. SEM evaluation of the worn specimens indicated that the 25% filled materials failed by fatigue and the 50% and 65% filled materials failed by abrasive wear. Impact wear produced fretting in this device and sliding wear is more aggressive than impact wear. Conclusion. Based on the results of this study and previous studies on this topic, manufacturers are recommended to use a filler

  7. 10 CFR 34.67 - Records of leak testing of sealed sources and devices containing depleted uranium.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 1 2010-01-01 2010-01-01 false Records of leak testing of sealed sources and devices containing depleted uranium. 34.67 Section 34.67 Energy NUCLEAR REGULATORY COMMISSION LICENSES FOR INDUSTRIAL... Requirements § 34.67 Records of leak testing of sealed sources and devices containing depleted uranium....

  8. Transfer Relation between the Compression Test Rig and the Anthropomorphic Test Device (ATD) Lower Leg

    Science.gov (United States)

    2015-08-01

    respectively. Moreover, SKYDEX material was used as the nominal floor mat in this loading test. Iso View Front View 11 Table 3 Loading conditions for...Fig. 18 Typical input- and output-acceleration histories in the CTR loading, CTR_03 (Height = 30 inches) 0 1000 2000 3000 -2 0 2 4 6 8 10 12 14 Ac...0.0 2.5 5.0 7.5 0 1000 2000 3000 -2 0 2 4 6 8 10 12 14 Lo ad (k N ) Ac ce le ra tio n (k N ) Time (msec) Input Acceleration Lower Tibia Load 15

  9. Efficient Testing of Wireless Devices from 800 MHz to 18 GHz

    Directory of Open Access Journals (Sweden)

    A. Scannavini

    2009-12-01

    Full Text Available Small antennas and other modern communication applications are using increasingly higher frequencies while demanding shorter development time and very rapid testing cycles. A fast and accurate way to exhaustively determine antenna performance and/or investigate device malfunction is based on spherical near field measurement techniques combined with probe array technology. This paper describes the innovative design aspects of the StarLab portable antenna measurement system and present results from the validation campaigns including both passive and active measurements. The use of integrated diagnostic and analysis software modules for efficient antenna design and testing is also presented.

  10. 10 CFR Appendix J1 to Subpart B of... - Uniform Test Method for Measuring the Energy Consumption of Automatic and Semi-Automatic Clothes...

    Science.gov (United States)

    2010-01-01

    ..., or control of any of the following: wash water temperature, agitation or tumble cycle time, number of... intervention or actions. 1.3Bone-dry means a condition of a load of test cloth which has been dried in a dryer... with water to a selected level and the clothes load is rinsed by agitating it or tumbling it...

  11. Automatic Control System for Neutron Laboratory Safety

    Institute of Scientific and Technical Information of China (English)

    ZHAO; Xiao; ZHANG; Guo-guang; FENG; Shu-qiang; SU; Dan; YANG; Guo-zhao; ZHANG; Shuai

    2015-01-01

    In order to cooperate with the experiment of neutron generator,and realize the automatic control in the experiment,a set of automatic control system for the safety of the neutron laboratory is designed.The system block diagram is shown as Fig.1.Automatic control device is for processing switch signal,so PLC is selected as the core component

  12. New nucleic acid testing devices to diagnose infectious diseases in resource-limited settings.

    Science.gov (United States)

    Maffert, P; Reverchon, S; Nasser, W; Rozand, C; Abaibou, H

    2017-06-01

    Point-of-care diagnosis based on nucleic acid testing aims to incorporate all the analytical steps, from sample preparation to nucleic acid amplification and detection, in a single device. This device needs to provide a low-cost, robust, sensitive, specific, and easily readable analysis. Microfluidics has great potential for handling small volumes of fluids on a single platform. Microfluidic technology has recently been applied to paper, which is already used in low-cost lateral flow tests. Nucleic acid extraction from a biological specimen usually requires cell filtration and lysis on specific membranes, while affinity matrices, such as chitosan or polydiacetylene, are well suited to concentrating nucleic acids for subsequent amplification. Access to electricity is often difficult in resource-limited areas, so the amplification step needs to be equipment-free. Consequently, the reaction has to be isothermal to alleviate the need for a thermocycler. LAMP, NASBA, HDA, and RPA are examples of the technologies available. Nucleic acid detection techniques are currently based on fluorescence, colorimetry, or chemiluminescence. For point-of-care diagnostics, the results should be readable with the naked eye. Nowadays, interpretation and communication of results to health professionals could rely on a smartphone, used as a telemedicine device. The major challenge of creating an "all-in-one" diagnostic test involves the design of an optimal solution and a sequence for each analytical step, as well as combining the execution of all these steps on a single device. This review provides an overview of available materials and technologies which seem to be adapted to point-of-care nucleic acid-based diagnosis, in low-resource areas.

  13. Semipermeable-membrane devices as an in situ and laboratory testing chamber

    Energy Technology Data Exchange (ETDEWEB)

    Gardiner, W.W.; Word, J.Q. [Battelle, Seqium, WA (United States). Marine Sciences Lab.

    1995-12-31

    The use of semipermeable-membrane devices (SPMDs) to measure the bioavailability of dissolved (< 10{angstrom}) hydrophobic-organic-compounds has recently been established. These low-density polyethylene bags are effective and relatively easy in situ devices for evaluating bioaccumulation potentials of polyaromatic hydrocarbons, pesticides, polychlorinated biphenyls, and dioxins. The authors believe SPMDs may also be effective in situ and laboratory testing chambers for evaluating dissolved contaminant effects on sensitive life stages of freshwater/marine fish and invertebrates. Applications may include dissolved contaminant toxicity of effluents, porewater, water-column, and surface microlayer. In laboratory tests, the applicability of SPMD-testing chambers was explored with marine bivalve larvae (Mytilus galloprovincialis). Test solutions were filtered seawater, dissolved copper, ammonia, and an elutriate preparation that included both organic and inorganic contaminants. SPMDs were filled with seawater, immersed in test solutions for 24-h, then spiked with fertilized M. galloprovincialis embryos. Following 48-h exposures, >90% survival and normal development was observed in the controls, indicating that incubation in the SPMDs did not adversely affect larval development. Incubation in test treatments resulted in slight, but not significantly different, reductions in normal development, relative to the controls. The authors believe longer SPMD immersion prior to testing will likely be required to allow SPMD contents to reach equilibrium with test solutions before eliciting a significant toxicological response. While this may limit the application of SPMDs for short term in situ exposures, they may be used for field/laboratory exposures of a week or more or for collecting equilibrated field samples for laboratory testing.

  14. Horizontal shaking table tests and analysis on structures with multi-dimensional earthquake isolation and mitigation devices

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    The viscoelastic multi-dimensional earthquake isolation and mitigation device is a new kind of passive control device, which has both earthquake isolation and earthquake mitigation abilities. In order to quantify the horizontal earthquake isolation and mitigation effect of this device on structures, shaking table tests on structures with and without the devices and the corresponding analysis on earthquake isolation and mitigation properties are carried out. It can be shown from the experimental and analytical results that the device has both earthquake isolation and earthquake mitigation effects on structures in horizontal direction, and its horizontal earthquake mitigation coefficients can be referred to those of the rubber bearing earthquake isolation structure.

  15. Standard test method for calibration of surface/stress measuring devices

    CERN Document Server

    American Society for Testing and Materials. Philadelphia

    1997-01-01

    Return to Contents page 1.1 This test method covers calibration or verification of calibration, or both, of surface-stress measuring devices used to measure stress in annealed and heat-strengthened or tempered glass using polariscopic or refractometry based principles. 1.2 This test method is nondestructive. 1.3 This test method uses transmitted light, and therefore, is applicable to light-transmitting glasses. 1.4 This test method is not applicable to chemically tempered glass. 1.5 Using the procedure described, surface stresses can be measured only on the “tin” side of float glass. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

  16. Comparison of the analytical capabilities of the BAC Datamaster and Datamaster DMT forensic breath testing devices.

    Science.gov (United States)

    Glinn, Michele; Adatsi, Felix; Curtis, Perry

    2011-11-01

    The State of Michigan uses the Datamaster as an evidential breath testing device. The newest version, the DMT, will replace current instruments in the field as they are retired from service. The Michigan State Police conducted comparison studies to test the analytical properties of the new instrument and to evaluate its response to conditions commonly cited in court defenses. The effects of mouth alcohol, objects in the mouth, and radiofrequency interference on paired samples from drinking subjects were assessed on the DMT. The effects of sample duration and chemical interferents were assessed on both instruments, using drinking subjects and wet-bath simulators, respectively. Our testing shows that Datamaster and DMT results are essentially identical; the DMT gave accurate readings as compared with measurements made using simulators containing standard ethanol solutions and that the DMT did not give falsely elevated breath alcohol results from any of the influences tested.

  17. The development of an instrumented wheelchair propulsion testing and training device.

    Science.gov (United States)

    Klaesner, Joseph; Morgan, Kerri A; Gray, David B

    2014-01-01

    Researchers have used several types of testing devices and training surfaces to examine wheelchair propulsion. Testing and training wheelchair users on the actual surface of interest, such as tile floors or ramps, is ideal but difficult. Devices such as treadmills, dynamometers, and ergometers allow for researchers and clinicians to observe wheelchair users in a controlled space. However, these devices often do not have the ability to realistically simulate the environment. This methodological article describes the instrumentation, development and function of a wheelchair dynamometer system, the WheelMill System (WMS), a uniquely adjustable roller system for wheelchairs. Three participants wheeled on the WMS, over a tile surface and up two different graded slopes with the SmartWheel to compare speed and forces. The WMS reasonably simulated propulsion over a tile floor, though the participants' speed was slightly faster on tile, and the peak forces for each propulsion stroke varied more on tile than on the WMS. For the slopes, the speed oscillated over a greater range and was slower, and the measured peak forces were higher than the values measured on the WMS. The WMS may have several applications, though additional studies on a greater and more diverse population are needed.

  18. Mechanism Development, Testing, and Lessons Learned for the Advanced Resistive Exercise Device

    Science.gov (United States)

    Lamoreaux, Christopher D.; Landeck, Mark E.

    2006-01-01

    The Advanced Resistive Exercise Device (ARED) has been developed at NASA Johnson Space Center, for the International Space Station (ISS) program. ARED is a multi-exercise, high-load resistive exercise device, designed for long duration, human space missions. ARED will enable astronauts to effectively maintain their muscle strength and bone mass in the micro-gravity environment more effectively than any other existing devices. ARED's resistance is provided via two, 20.3 cm (8 in) diameter vacuum cylinders, which provide a nearly constant resistance source. ARED also has a means to simulate the inertia that is felt during a 1-G exercise routine via the flywheel subassembly, which is directly tied to the motion of the ARED cylinders. ARED is scheduled to fly on flight ULF 2 to the ISS and will be located in Node 1. Presently, ARED is in the middle of its qualification and acceptance test program. An extensive testing program and engineering evaluation has increased the reliability of ARED by bringing potential design issues to light before flight production. Some of those design issues, resolutions, and design details will be discussed in this paper.

  19. Postmortem circulation: a new model for testing endovascular devices and training clinicians in their use.

    Science.gov (United States)

    Chevallier, Christine; Willaert, Wouter; Kawa, Emilia; Centola, Marcos; Steger, Beat; Dirnhofer, Richard; Mangin, Patrice; Grabherr, Silke

    2014-05-01

    The development of new medical devices, such as aortic valves, requires numerous preliminary studies on animals and training of personnel on cadavers before the devices can be used in patients. Postmortem circulation, a technique used for postmortem angiography, allows the vascular system to be reperfused in a way similar to that in living persons. This technique is used for postmortem investigations to visualize the human vascular system and to make vascular diagnoses. Specific material for reperfusing a human body was developed recently. Our aim was to investigate whether postmortem circulation that imitates in vivo conditions allows for the testing of medical materials on cadavers. We did this by delivering an aortic valve using minimally invasive methods. Postmortem circulation was established in eight corpses to recreate an environment as close as possible to in vivo conditions. Mobile fluoroscopy and a percutaneous catheterization technique were used to deliver the material to the correct place. Once the valve was implanted, the heart and primary vessels were extracted to confirm its position. Postmortem circulation proved to be essential in several of the cadavers because it helped the clinicians to deliver the material and improve their implantation techniques. Due to the intravascular circulation, sites with substantial arteriosclerotic stenosis could be bypassed, which would have been impossible without perfusion. Although originally developed for postmortem investigations, this reperfusion technique could be useful for testing new medical devices intended for living patients.

  20. Use of Silicon Carbide as Beam Intercepting Device Material: Tests, Issues and Numerical Simulations

    CERN Document Server

    Delonca, M; Gil Costa, M; Vacca, A

    2014-01-01

    Silicon Carbide (SiC) stands as one of the most promising ceramic material with respect to its thermal shock resistance and mechanical strengths. It has hence been considered as candidate material for the development of higher performance beam intercepting devices at CERN. Its brazing with a metal counterpart has been tested and characterized by means of microstructural and ultrasound techniques. Despite the positive results, its use has to be evaluated with care, due to the strong evidence in literature of large and permanent volumetric expansion, called swelling, under the effect of neutron and ion irradiation. This may cause premature and sudden failure, and can be mitigated to some extent by operating at high temperature. For this reason limited information is available for irradiation below 100°C, which is the typical temperature of interest for beam intercepting devices like dumps or collimators. This paper describes the brazing campaign carried out at CERN, the results, and the theoretical and numeric...

  1. A forensic laboratory tests the Berkeley microfabricated capillary array electrophoresis device.

    Science.gov (United States)

    Greenspoon, Susan A; Yeung, Stephanie H I; Johnson, Kelly R; Chu, Wai K; Rhee, Han N; McGuckian, Amy B; Crouse, Cecelia A; Chiesl, Thomas N; Barron, Annelise E; Scherer, James R; Ban, Jeffrey D; Mathies, Richard A

    2008-07-01

    Miniaturization of capillary electrophoresis onto a microchip for forensic short tandem repeat analysis is the initial step in the process of producing a fully integrated and automated analysis system. A prototype of the Berkeley microfabricated capillary array electrophoresis device was installed at the Virginia Department of Forensic Science for testing. Instrument performance was verified by PowerPlex 16 System profiling of single source, sensitivity series, mixture, and casework samples. Mock sexual assault samples were successfully analyzed using the PowerPlex Y System. Resolution was assessed using the TH01, CSF1PO, TPOX, and Amelogenin loci and demonstrated to be comparable with commercial systems along with the instrument precision. Successful replacement of the Hjerten capillary coating method with a dynamic coating polymer was performed. The accurate and rapid typing of forensic samples demonstrates the successful technology transfer of this device into a practitioner laboratory and its potential for advancing high-throughput forensic typing.

  2. Stress testing on silicon carbide electronic devices for prognostics and health management.

    Energy Technology Data Exchange (ETDEWEB)

    Kaplar, Robert James; Brock, Reinhard C.; Marinella, Matthew; King, Michael Patrick; Smith, Mark A.; Atcitty, Stanley

    2011-01-01

    Power conversion systems for energy storage and other distributed energy resource applications are among the drivers of the important role that power electronics plays in providing reliable electricity. Wide band gap semiconductors such as silicon carbide (SiC) and gallium nitride (GaN) will help increase the performance and efficiency of power electronic equipment while condition monitoring (CM) and prognostics and health management (PHM) will increase the operational availability of the equipment and thereby make it more cost effective. Voltage and/or temperature stress testing were performed on a number of SiC devices in order to accelerate failure modes and to identify measureable shifts in electrical characteristics which may provide early indication of those failures. Those shifts can be interpreted and modeled to provide prognostic signatures for use in CM and/or PHM. Such experiments will also lead to a deeper understanding of basic device physics and the degradation mechanisms behind failure.

  3. Evaluation of Human and Anthropomorphic Test Device Finite Element Models under Spaceflight Loading Conditions

    Science.gov (United States)

    Putnam, Jacob P.; Untaroiu, Costin; Somers. Jeffrey

    2014-01-01

    In an effort to develop occupant protection standards for future multipurpose crew vehicles, the National Aeronautics and Space Administration (NASA) has looked to evaluate the test device for human occupant restraint with the modification kit (THOR-K) anthropomorphic test device (ATD) in relevant impact test scenarios. With the allowance and support of the National Highway Traffic Safety Administration, NASA has performed a series of sled impact tests on the latest developed THOR-K ATD. These tests were performed to match test conditions from human volunteer data previously collected by the U.S. Air Force. The objective of this study was to evaluate the THOR-K finite element (FE) model and the Total HUman Model for Safety (THUMS) FE model with respect to the tests performed. These models were evaluated in spinal and frontal impacts against kinematic and kinetic data recorded in ATD and human testing. Methods: The FE simulations were developed based on recorded pretest ATD/human position and sled acceleration pulses measured during testing. Predicted responses by both human and ATD models were compared to test data recorded under the same impact conditions. The kinematic responses of the models were quantitatively evaluated using the ISO-metric curve rating system. In addition, ATD injury criteria and human stress/strain data were calculated to evaluate the risk of injury predicted by the ATD and human model, respectively. Results: Preliminary results show well-correlated response between both FE models and their physical counterparts. In addition, predicted ATD injury criteria and human model stress/strain values are shown to positively relate. Kinematic comparison between human and ATD models indicates promising biofidelic response, although a slightly stiffer response is observed within the ATD. Conclusion: As a compliment to ATD testing, numerical simulation provides efficient means to assess vehicle safety throughout the design process and further improve the

  4. Comparative Analysis of Automatic Bus Transfer Equipment and Service Power Fast Cutting Device%“备自投装置”、“厂用电快切装置”比较分析

    Institute of Scientific and Technical Information of China (English)

    王如平

    2013-01-01

      厂用电切换装置作为电厂厂用电系统的一个重要装置,它的性能好坏对电厂来说尤为重要,本文结合山西阳煤集团发供电分公司第三热电厂实际情况,就微机备自投装置、微机厂用电快切装置进行了全面比较和深入分析。%Auxiliary power switching device as an important unit of the power plant auxiliary power system, it is particularly important for the power plant. Combined with No.3 Thermal Power Plant of Yangquan Coal Industry Group Power Generating and Supplying Company, the paper makes an in-depth comparative analysis on microcomputer automatic bus transfer equipment and microprocessor service power fast cutting device.

  5. The Design of Automatic Filling Device for the Brake Fluid Replacement%基于汽车制动液更换的自动加注装置设计

    Institute of Scientific and Technical Information of China (English)

    杨省云

    2014-01-01

    It introduces the replacement process and matters for needing attention of motor vehicle brake fluid , presents a structure of the pneumatic brake fluid automatic replacement device structure and working principle , and analyses the device development background and technical innovation .%通过对汽车制动液的更换过程和注意事项进行介绍,论述了一种气动汽车制动液自动更换装置的结构组成及工作原理,同时介绍了该装置的研发背景,分析了其技术创新点。

  6. Microfluidic devices for stem-cell cultivation, differentiation and toxicity testing

    Science.gov (United States)

    Becker, Holger; Hansen-Hagge, Thomas; Kurtz, Andreas; Mrowka, Ralf; Wölfl, Stefan; Gärtner, Claudia

    2017-02-01

    The development of new drugs is time-consuming, extremely expensive and often promising drug candidates fail in late stages of the development process due to the lack of suitable tools to either predict toxicological effects or to test drug candidates in physiologically relevant environments prior to clinical tests. We therefore try to develop diagnostic multiorgan microfluidic chips based on patient specific induced pluripotent stem cell (iPS) technology to explore liver dependent toxic effects of drugs on individual human tissues such as liver or kidney cells. Based initially on standardized microfluidic modules for cell culture, we have developed integrated microfluidic devices which contain different chambers for cell/tissue cultivation. The devices are manufactured using injection molding of thermoplastic polymers such as polystyrene or cyclo-olefin polymer. In the project, suitable surface modification methods of the used materials had to be explored. We have been able to successfully demonstrate the seeding, cultivation and further differentiation of modified iPS, as shown by the use of differentiation markers, thus providing a suitable platform for toxicity testing and potential tissue-tissue interactions.

  7. Understanding the role of stimulation in reflexology: development and testing of a robotic device.

    Science.gov (United States)

    Flynn, L L; Bush, T R; Sikorskii, A; Mukherjee, R; Wyatt, G

    2011-09-01

    Reflexology is a common choice of women with breast cancer as supportive care during treatment. It involves stimulation of specific locations of the feet called reflexes using a specialised walking motion with the thumb of the reflexologist. Reflexology has shown potential for the successful management of cancer and treatment-related symptoms and improvement in physical functioning; however to date, the mechanism of action for these improvements is unknown. One confounder to the study of reflexology is the 'human factor'. To study the effects of the stimulation of the reflexes independent of the 'human factor', there is a need for an alternative method for the delivery of reflexology. The objective of this work was to design and create a robotic reflexology device that would deliver a breast cancer-specific reflexology protocol to the feet of patients. A prototype robotic reflexology device was developed and tested for feasibility, safety and acceptability with breast cancer survivors (n= 13), and preliminary efficacy in symptom management and enhanced functional status with a sample of women undergoing chemotherapy for breast cancer (n= 13). Safety, feasibility and acceptability were established, and significant improvements from pre- to post-device-delivered reflexology were seen in symptom severity among women on chemotherapy.

  8. Development, Test and Validation of a Mechatronic Device for Spasticity Quantification

    Directory of Open Access Journals (Sweden)

    João F. Ferreira

    2013-05-01

    Full Text Available Spasticity is a common pathological phenomenon in clinical practices, frequently expressed as a stroke, multiple sclerosis or cerebral palsy. The accurate quantification of spasticity allows early action to prevent the potentially irreversible consequences. The aim of this work is to develop and implement a mechatronic device for the accurate quantification of spasticity, which is able to differentiate spasticity from other motor disorders. The proposed method is based on the quantification of the tonic stretch reflex threshold (TSRT for the assessment of the range of motion of the limb affected by spasticity. In order to validate the developed device, experimental trials have been conducted, considering the flexor muscle of the elbow joint. The developed device was tested, first in a laboratory environment with healthy subjects and secondly, in a clinical environment with the collaboration of patients with spasticity. The evaluations in th clinical environment were performed on three different days in order to evaluate the reproducibility of the obtained results. The experimental trials confirm the sensibility, reproducibility and reliability of spasticity quantification based on the TSRT method. This project has been developed in cooperation with the Hospital of Braga and Fisimaia rehabilitation clinic, both in Portugal.

  9. Ground Tests and In-Orbit Performance of Variable Emittance Device Based on Manganese Oxide

    Science.gov (United States)

    Tachikawa, Sumitaka; Ohnishi, Akira; Nakamura, Yasuyuki; Okamoto, Akira

    A new thermal control material named the Smart Radiation Device (SRD) has shown improvement in development. The SRD can be used as a variable emittance radiator that controls the heat radiated into deep space without assistances of any electrical instruments or mechanical parts. Its total hemispherical emittance changes from low to high as the temperature increases. This new device reduces the energy consumption of the on-board heater, and decreases the weight and the cost of the thermal control system (TCS). Space environmental simulation tests on the ground were performed, and the first generation of the SRD has been demonstrating success on the MUSES-C ‘HAYABUSA’ spacecraft that was launched in May 2003. During its cruise on the orbit, the distance from the spacecraft to the sun varied from 0.86AU to 1.70AU. As the spacecraft experienced solar intensity variation by a factor 4, it was effective to use the variable emittance radiator for decreasing the heater power. In-orbit temperature indicated that the SRD had successfully minimized component temperature variation and saved heater power, as expected. With the opportunity to validate the SRD in space, this lightweight and low cost thermal control device offers a possibility for flexible thermal control on future spacecrafts.

  10. Vibration Mitigation without Dissipative Devices: First Large-Scale Testing of a State Switched Inducer

    Directory of Open Access Journals (Sweden)

    Daniel Tirelli

    2014-01-01

    Full Text Available A new passive device for mitigating cable vibrations is proposed and its efficiency is assessed on 45-meter long taut cables through a series of free and forced vibration tests. It consists of a unilateral spring attached perpendicularly to the cable near the anchorage. Because of its ability to change the cable dynamic behaviour through intermittent activation, the device has been called state switched inducer (SSI. The cable behaviour is shown to be deeply modified by the SSI: the forced vibration response is anharmonicc and substantially reduced in amplitude whereas the free vibration decay is largely sped up through a beating phenomenon. The vibration mitigation effect is mainly due to the activation and coupling of various vibration modes, as evidenced in the response spectra of the equipped cable. This first large-scale experimental campaign shows that the SSI outperforms classical passive devices, thus paving the way to a new kind of low-cost vibration mitigation systems which do not rely on dissipation.

  11. Design of Automatic Switch Device of the Auxiliary Power Supply to a High-Reliability System in Shooting Range%靶场某高可靠系统备用电源自投装置设计

    Institute of Scientific and Technical Information of China (English)

    何吉祥; 李晓波; 张昊

    2012-01-01

    In order to improve the reliability of the power supply and to ensure uninterrupted power supply of shooting range equipment,an automatic switch device of the auxiliary power supply is developed.Firstly,its composition structure and working principles are introduced;the general design thoughts and hardware design methods of the device are described in detail,mainly about the design of power plug-ins,master controller plug-ins,human-computer interaction plug-ins,current and voltage acquisition plug-ins,relay plug-in and human-machine interface plug-ins.Meanwhile software design method of the automatic switch device of the auxiliary power supply is researched;rapid and reliable power supply switching and a concise human-machine interface are realized.At last,the reliability of this device is discussed.%为了提高电源的可靠性,保证靶场设备的不间断供电,研究了一种备用电源自投装置。在介绍其组成结构和工作原理的基础上,对装置的总体设计思想和硬件设计方法进行了详细的描述,主要包括电源插件、主控制器插件、电流和电压采集插件、继电器插件、人机交互插件等关键环节的设计。同时对备用电源自投装置的软件设计方法做了研究,实现了主备电源的快速、可靠切换和简洁的人机界面。最后对该装置的可靠性问题进行了探讨。

  12. 实施PID参数整定提高苯酚丙酮装置自控水平%Tuning of PID Parameters to Improve the Automatic Control Level of Phenol-acetone Device

    Institute of Scientific and Technical Information of China (English)

    张恒

    2012-01-01

    Automatic control level is an important indicator for secure operation and efficient production of petrochemical enterprises production device,which directly impact on energy consumption and product quality.The PID parameters of the control loop decide the use of automatic control in control loop and the usage effect.In order to improve the automation level,Yanshan Petrochemical Company cooperated with Beijing University of Chemical Technology implement PID parameter tuning(according to the controlled variable characteristics,choose appropriate parameters of regulator to obtain the best control effect and ensure the automatic safe operation of control loop) of 41 sets of production device.On this basis,we implement automatic control rate monitor to ensure the PID optimization.This article introduced the application of PID parameters tuning in phenol acetone production device.%自控水平是企业生产装置安稳运行、高效生产的重要指标,直接影响能耗和产品质量。控制回路能否投用自控、投用效果好坏取决于控制回路的PID参数设置,为了提高自控水平,燕山石化公司与北京化工大学合作陆续对41套生产装置实施了PID参数整定(根据被控变量的特性,合理选择调节器的参数,获得最佳的控制效果,确保控制回路自动安稳运行)。在此基础上实施了自控率监控,保证了PID优化成果。本文以此为背景,介绍PID参数整定在苯酚丙酮装置的应用情况。

  13. Design of Automatic LeveIing Device Based on MarIin Firmware Desktop 3D Printer%基于MarIin固件桌面级3D打印机自动调平装置设计

    Institute of Scientific and Technical Information of China (English)

    宗殿栋; 汪地; 李卫成; 姜海龙; 刘谋玉

    2016-01-01

    桌面级3D打印机第一层的打印质量对于打印的成败非常重要,自动调平装置可以保证打印第一层时的打印可靠性,同时可以降低桌面级3D打印机的使用难度。基于桌面级3D打印机使用广泛的开源MarIin固件,在主程序和运动控制方面进行分析,设计了一种新型桌面级3D打印机自动调平装置,与现有自动调平装置相比,具有结构简单、稳定性高,通用性好的优点。%This paper based on a wide range use of open source MarIin firmware,anaIysis this firmware in main program and motion controI.The design of a new type of desktop 3D printer automatic IeveIing device,compared with the existing au-tomatic IeveIing device,with the advantage of a simpIe structure, high stabiIity.

  14. A system for measuring an optical spectral response and/or IV data of a photoelectric device under test

    NARCIS (Netherlands)

    Elshinawy, M.; Heirman, S.G.M.; Melsken, J.; Fischer, M.

    2015-01-01

    A system for measuring an optical spectral response or property and/or IV data of a device or object under test (9), comprising in optically coupled sequence: a broadband light source (1) for emitting light of a prede- fined spectrum, a slit and/or light guide (2), a wavelength dispersive device (3)

  15. EquiMar : Equitable Testing and Evaluation of Marine Energy Extraction Devices in terms of Performance, Cost and Environmental Impact

    DEFF Research Database (Denmark)

    McCombes, T; Johnstone, C.; Holmes, B.

    of current practices adopted for tank testing of small prototype devices and the development of new methods enabling device performance assessment and benchmarking. The contents of this report will be tightly integrated with the remaining deliverables of WP 3, specifically Deliverable 3.4.a...

  16. Liquid Acquisition Device Hydrogen Outflow Testing on the Cryogenic Propellant Storage and Transfer Engineering Design Unit

    Science.gov (United States)

    Zimmerli, Greg; Statham, Geoff; Garces, Rachel; Cartagena, Will

    2015-01-01

    As part of the NASA Cryogenic Propellant Storage and Transfer (CPST) Engineering Design Unit (EDU) testing with liquid hydrogen, screen-channel liquid acquisition devices (LADs) were tested during liquid hydrogen outflow from the EDU tank. A stainless steel screen mesh (325x2300 Dutch T will weave) was welded to a rectangular cross-section channel to form the basic LAD channel. Three LAD channels were tested, each having unique variations in the basic design. The LADs fed a common outflow sump at the aft end of the 151 cu. ft. volume aluminum tank, and included a curved section along the aft end and a straight section along the barrel section of the tank. Wet-dry sensors were mounted inside the LAD channels to detect when vapor was ingested into the LADs during outflow. The use of warm helium pressurant during liquid hydrogen outflow, supplied through a diffuser at the top of the tank, always led to early breakdown of the liquid column. When the tank was pressurized through an aft diffuser, resulting in cold helium in the ullage, LAD column hold-times as long as 60 minutes were achieved, which was the longest duration tested. The highest liquid column height at breakdown was 58 cm, which is 23 less than the isothermal bubble-point model value of 75 cm. This paper discusses details of the design, construction, operation and analysis of LAD test data from the CPST EDU liquid hydrogen test.

  17. Anomalous Thrust Production from an RF Test Device Measured on a Low-Thrust Torsion Pendulum

    Science.gov (United States)

    Brady, David A.; White, Harold G.; March, Paul; Lawrence, James T.; Davies, Frank J.

    2014-01-01

    This paper describes the test campaigns designed to investigate and demonstrate viability of using classical magnetoplasmadynamics to obtain a propulsive momentum transfer via the quantum vacuum virtual plasma. This paper will not address the physics of the quantum vacuum plasma thruster (QVPT), but instead will describe the recent test campaign. In addition, it contains a brief description of the supporting radio frequency (RF) field analysis, lessons learned, and potential applications of the technology to space exploration missions. During the first (Cannae) portion of the campaign, approximately 40 micronewtons of thrust were observed in an RF resonant cavity test article excited at approximately 935 megahertz and 28 watts. During the subsequent (tapered cavity) portion of the campaign, approximately 91 micronewtons of thrust were observed in an RF resonant cavity test article excited at approximately 1933 megahertz and 17 watts. Testing was performed on a low-thrust torsion pendulum that is capable of detecting force at a single-digit micronewton level. Test campaign results indicate that the RF resonant cavity thruster design, which is unique as an electric propulsion device, is producing a force that is not attributable to any classical electromagnetic phenomenon and therefore is potentially demonstrating an interaction with the quantum vacuum virtual plasma.

  18. Development of Performance Testing Device for Tire Pressure Gauges%轮胎气压表性能检测装置的研制

    Institute of Scientific and Technical Information of China (English)

    屠彬彬; 蔡绯; 孙坚

    2014-01-01

    开发了一台轮胎气压表性能检测装置,主要功能包括轮胎气压表的准确性检测和耐久性能检测。该装置通过 PLC 电气控制,对于给定的压力范围和压力交变幅度,自动控制压力耐久试验按规定的频率进行,并适用于市面上常见的标尺式和指针式轮胎气压表。该装置研制成功,对合理评价轮胎气压表性能,严格按照标准开展性能检测提供了技术支持,节省了大量人力。%We developed a performance testing device for tire pressure gauges,and its main functions include the accuracy testing and dura-bility testing of tire pressure gauges. The device is controled by PLC. Within a given range of pressure and pressure alternating amplitude,it can automatically control the pressure durability test in accordance with the required frequency. It is applicable to the common scale-typed and point-er-typed tire pressure gauges. It can objectively and reasonably evaluate the performance of tire pressure gauges,and can provide technical sup-port for the performance testing in strict accordance with the standards,and can save a lot of manpower.

  19. Vertical shaking table tests on the structure with viscoelastic multi-dimensional earthquake isolation and mitigation devices

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    The viscoelastic multi-dimensional earthquake isolation and mitigation device is a new kind of passive control device, which can perform its "name-giving" task of earthquake isolation and earthquake mitigation simultaneously. In order to quantify its vertical earthquake isolation and mitigation effect on structures, firstly, shaking table tests on steel frame structures with and without the devices were carried out; secondly, analysis on dynamic characteristics and dynamic responses of the structures was also performed; furthermore, the finite element analytical results and the experimental results were compared. It can be shown from the analytical and experimental results that the devices have noticeable earthquake isolation and mitigation effect in the vertical direction.

  20. EquiMar : Equitable Testing and Evaluation of Marine Energy Extraction Devices in terms of Performance, Cost and Environmental Impact

    DEFF Research Database (Denmark)

    McCombes, T; Johnstone, C.; Holmes, B.

    development funding or promote a specific wave or tidal energy device. Since no standards exist, the data produced may be misinterpreted or inaccurately presented, which in turn may lead to failure to live up to performance expectations, as devices scale up in size. This report aims to identify limitations...... of current practices adopted for tank testing of small prototype devices and the development of new methods enabling device performance assessment and benchmarking. The contents of this report will be tightly integrated with the remaining deliverables of WP 3, specifically Deliverable 3.4.a...

  1. Rapid prototyping compliant arterial phantoms for in-vitro studies and device testing

    Directory of Open Access Journals (Sweden)

    Biglino Giovanni

    2013-01-01

    Full Text Available Abstract Background Compliant vascular phantoms are desirable for in-vitro patient-specific experiments and device testing. TangoPlus FullCure 930® is a commercially available rubber-like material that can be used for PolyJet rapid prototyping. This work aims to gather preliminary data on the distensibility of this material, in order to assess the feasibility of its use in the context of experimental cardiovascular modelling. Methods The descending aorta anatomy of a volunteer was modelled in 3D from cardiovascular magnetic resonance (CMR images and rapid prototyped using TangoPlus. The model was printed with a range of increasing wall thicknesses (0.6, 0.7, 0.8, 1.0 and 1.5 mm, keeping the lumen of the vessel constant. Models were also printed in both vertical and horizontal orientations, thus resulting in a total of ten specimens. Compliance tests were performed by monitoring pressure variations while gradually increasing and decreasing internal volume. Knowledge of distensibility was thus derived and then implemented with CMR data to test two applications. Firstly, a patient-specific compliant model of hypoplastic aorta suitable for connection in a mock circulatory loop for in-vitro tests was manufactured. Secondly, the right ventricular outflow tract (RVOT of a patient necessitating pulmonary valve replacement was printed in order to physically test device insertion and assess patient’s suitability for percutaneous pulmonary valve intervention. Results The distensibility of the material was identified in a range from 6.5 × 10-3 mmHg-1 for the 0.6 mm case, to 3.0 × 10-3 mmHg-1 for the 1.5 mm case. The models printed in the vertical orientation were always more compliant than their horizontal counterpart. Rapid prototyping of a compliant hypoplastic aorta and of a RVOT anatomical model were both feasible. Device insertion in the RVOT model was successful. Conclusion Values of distensibility, compared with literature data, show that Tango

  2. 自动测试系统中矩阵开关的设计与实现%Design and Implementation of Matrix Switch in Automatic Test System

    Institute of Scientific and Technical Information of China (English)

    陈雄姿; 龙辛; 戴建利; 刘道

    2015-01-01

    The matrix switch is an important part of an automatic test system ,being responsible for channel selection and switching of test signals .Based on the practical requirements of automatic test system ,a large‐scale FPGA‐based matrix switch is designed and implemented .With the FPGA as the actual logic control core ,the matrix switch is configured through the host computer to the FPGA to achieve switching test circuit and peripherals .The program is of large switch scale ,low cost and strong versatility ,can greatly improves the efficiency of test .%矩阵开关是自动测试系统的重要组成部分,负责测试信号的通道选择和切换。根据自动测试系统的实际要求,设计并实现了一种基于FPGA的大规模矩阵开关,它以 FPGA为实际控制逻辑核心,通过上位机对FPGA进行配置以实现测试电路以及外围设备的切换。本方案具有开关规模大、成本低、通用性强等特点,极大地提高了测试效率和测试的自动化程度。

  3. 传输型CCD相机成像分辨率自动测试研究%Research on automatic testing of image resolution of transmission CCD camera

    Institute of Scientific and Technical Information of China (English)

    王锋; 高亚飞

    2013-01-01

    对CCD相机成像分辨率自动测试方法进行了研究,测试方案中改进设计了照相分辨率靶标,开展了数据分析处理,通过软硬件结合实现了对CCD相机整机分辨率的自动测试,结果数据经过专业测试比对确认有效。实验结果表明,方法客观、准确,能够避免以往人工测试分辨率带来的主观因素影响,具有很高的实用性。%The automatic testing method of an image resolution of CCD camera is researched. The photo resolution drone design is improved in the testing project. The data analyzing and processing is carried out,and the automatic testing of CCD camera resolution is realized through the combination of hardware and software. The effectiveness of the result data is verified by professional testing. The experiment results show that the method is impersonality and accurate,it can avoid the affect of subjec-tive factors brought by manual testing resolution,and has prominence practicability.

  4. Amplitude Test for Input Devices for System Control in Immersive Virtual Environment

    DEFF Research Database (Denmark)

    Stenholt, Rasmus; Thornemann Hansen, Nina; Hald, Kasper

    2014-01-01

    In this study, the amplitudes best suited to compare four input devices are examined in the context of a pointer-based system control interface for immersive virtual environments. The interfaces are based on a pen and tablet, a touch tablet, hand-tracking using Kinect and a Wii Nunchuk analog sti...... menu using each combination of amplitude and interface. The amplitudes to be used for future experiments were found. Also, the movement times for the interfaces do not fit the predictions of Fitts' law.......In this study, the amplitudes best suited to compare four input devices are examined in the context of a pointer-based system control interface for immersive virtual environments. The interfaces are based on a pen and tablet, a touch tablet, hand-tracking using Kinect and a Wii Nunchuk analog stick....... This is done as a preliminary study in order to be able to compare the interfaces with the goal of evaluating them in the context of using virtual environments in a class lecture. Five amplitudes are tested for each of the four interfaces by having test participants mark menu elements in an eight-part radial...

  5. [Research of joint-robotics-based design of biomechanics testing device on human spine].

    Science.gov (United States)

    Deng, Guoyong; Tian, Lianfang; Mao, Zongyuan

    2009-12-01

    This paper introduces the hardware and software of a biomechanical robot-based testing device. The bottom control orders, posture and torque data transmission, and the control algorithms are integrated in a unified visual control platform by Visual C+ +, with easy control and management. By using hybrid force-displacement control method to load the human spine, we can test the organizational structure and the force state of the FSU (Functional spinal unit) well, which overcomes the shortcomings due to the separation of the force and displacement measurement, thus greatly improves the measurement accuracy. Also it is esay to identify the spinal degeneration and the load-bearing impact on the organizational structure of the FSU after various types of surgery.

  6. A proposed hardness assurance test methodology for bipolar linear circuits and devices in a space ionizing radiation environment

    Energy Technology Data Exchange (ETDEWEB)

    Pease, R.L. [RLP Research, Albuquerque, NM (United States); Brown, D.B. [Naval Research Lab., Washington, DC (United States); Cohn, L. [Defense Special Weapons Agency, Alexandria, VA (United States)] [and others

    1997-04-01

    A hardness assurance test approach has been developed for bipolar linear circuits and devices in space. It consists of a screen for dose rate sensitivity and a characterization test method to develop the conditions for a lot acceptance test at high dose rate.

  7. Development and Operation of an Automatic Rotor Trim Control System for use During the UH-60 Individual Blade Control Wind Tunnel Test

    Science.gov (United States)

    Theodore, Colin R.

    2010-01-01

    A full-scale wind tunnel test to evaluate the effects of Individual Blade Control (IBC) on the performance, vibration, noise and loads of a UH-60A rotor was recently completed in the National Full-Scale Aerodynamics Complex (NFAC) 40- by 80-Foot Wind Tunnel [1]. A key component of this wind tunnel test was an automatic rotor trim control system that allowed the rotor trim state to be set more precisely, quickly and repeatably than was possible with the rotor operator setting the trim condition manually. The trim control system was also able to maintain the desired trim condition through changes in IBC actuation both in open- and closed-loop IBC modes, and through long-period transients in wind tunnel flow. This ability of the trim control system to automatically set and maintain a steady rotor trim enabled the effects of different IBC inputs to be compared at common trim conditions and to perform these tests quickly without requiring the rotor operator to re-trim the rotor. The trim control system described in this paper was developed specifically for use during the IBC wind tunnel test

  8. 稻田开放式自动化养鸭设备的研制及试验%Development and experiment of automatic duck feeding device with opening way for paddy

    Institute of Scientific and Technical Information of China (English)

    任文涛; 王岳; 孔爱菊; 辛明金; 宋玉秋; 邬立岩; 刘翠红; 崔红光

    2016-01-01

    为了解决鸭稻共作过程中依靠人工饲养鸭子费时费力的问题,加速推广具有良好经济效益和社会效益的水稻生态农业模式,该文设计了一种以单片机为控制核心,在无人值守情况下在稻田中自动化养鸭设备。该设备放置在稻田的输水渠上不占农田,由太阳能电池板产生的能量驱动,能够按照昼夜变化规律运行,早晨05:30后自动开门,傍晚18:00奏音乐唤鸭回笼并能自动补料、给水和关门。由于料斗放置在田间,饲料容易受潮而结拱影响补料量控制的精准度,设计了振动式料斗破拱装置,试验确定了破拱装置的振动偏心距为30 mm、转速为1200 r/min。田间试验结果表明,在自动门延迟关门1 min和声音响度100 dB时,鸭群回笼率达到97.5%以上;自动化养鸭设备饲养鸭群体质量增长与人工喂养无显著性差异(P>0.05)。该研究成果对鸭稻共作技术的推广应用具有重要意义。%The technology of raising duck in paddy filed has good economic and ecological benefits for rice based agriculture. The past studies are usually only based on interaction effect between ducks and paddy. In this paper, we took the development of automatic duck feeding equipment that could adapt environment of paddy as its study object. Equipment for both automatic feeding system and automatic door system are crucial issues needed to be solved by adequate design, calculation and testing. Through the relevant experiment for the speed of ducks returning to cages, we gained optimal speed of the automatic door was 5r/min. The automatic door of the related calculation showed that the adaptive quality of the automatic door was 4.15 kg, moment of inertia was 0.24 kg·m2. The time of accelerating speed of automatic doors from 0 to 5 r/min was 0.0067s. According to the dynamic theory, we obtained the minimum torque of automatic door was 9.8 N·m. Automatic door powered by 15W DC

  9. VP宽频带倾斜仪现场自动校准装置设计%Design of an On-site Automatic Calibration Device for the Vertical Pendulum Broadband Tiltmeter

    Institute of Scientific and Technical Information of China (English)

    马武刚; 张肖

    2016-01-01

    为了对VP宽频带倾斜仪进行现场校准,设计了一款基于单片机 AT89 C51的新型现场自动校准装置。经验证该装置在+8V激励电压情况下与高精度激光干涉仪结合使用,其校准相对误差为0.36%,满足小于1%的校准相对误差要求。%The vertical pendulum (VP)broadband tiltmeter is a type of earthquake precursor observation equipment that records the inclined earth tide.The scale value represents the relation-ship between the measured physical quantity and the output voltage.Its accuracy plays a key role in data reliability.The calibration process provides the scale value for the instrument.Most tradi-tional calibration methods,e.g.,plat calibrations in the laboratory and manual calibrations on site, cannot satisfy the accuracy levels required in scientific applications,or might affect the continuity of observations.In this study,we investigate an on-site automatic calibration device,in which small-scale shifts are introduced by a piezoelectric ceramic under the control of a single chip microcomputer AT89C51.The device then calculates the scale values from serial corresponding values of the outputs of the VP broadband tiltmeter and a laser interferometer.This device could realize the automatic operation of calibration,and its relative calibration accuracy is 0.36% when the excitation voltage is adj usted to +8 V,and meets the requirement of a relative error of less than 1%.

  10. Development of Energy-saving and Adjustable Automatic Proportioning Device of Emulsion Concentration%节能型配比可调的乳化液质量分数自动配比装置研制

    Institute of Scientific and Technical Information of China (English)

    赵四海; 曲继鹏; 颜斌; 刘志强

    2012-01-01

    分析了现有的乳化液质量分数自动配比技术,研制了一种容积式、节能型、质量分数配比连续可调的乳化液自动配比装置.该装置以井下压力自来水为动力源,以高精度的椭圆齿轮马达为流量一转速转换元件,同时也是整个装置的动力元件,通过机械传动机构与变量油泵联接,调节变量泵的排量即可改变配制乳化液的体积分数.该装置已在许多煤矿投入使用,实现了预期的功能.%The known methods of automatic supervisory system of emulsion proportioning were analyzed, and a kind of automatic proportioning device with positive displacement and energy-saving and continuously variable was developed. In this device, the high-pressure water in coal mine was used as power source, and the high-accuracy elliptical gear motor was used as flow/speed conversion element and dynamic components for the whole device as well. Through coupling between the mechanical transmission system and variable pump, die concentration of configurable emulsion could be changed by adjusting the variable pump emissions. This equipment has been used in many coal mines and anticipated function is realized.

  11. Do means-end chains exist? Experimental tests of their hierarchicity, automatic spreading activation, directionality, and self-relevance

    DEFF Research Database (Denmark)

    Scholderer, Joachim; Grunert, Klaus G.

    2004-01-01

    Despite its popularity in consumer research, means-end chain (MEC) theory suffers from problems of unconfirmed validity. Theoretically, MECs can be cast as associative networks with a three-layered structure that should exhibit four properties: hierarchicity, automatic spreading activation...... this material, individualized stimulus sets were generated for use in the second session. In the second session, each participant completed a series of single-presentation lexical decision tasks. Analysis of spreading activation processes under different procedural variations showed that MECs are firmly...

  12. DEVELOPMENTAND FIRST TESTS OF AN AUTOMATIC SYSTEM FOR COMMERCIAL VINE CUTTING TRANSPLANTERS BASED ON DGPS-RTK TECHNOLOGY

    Directory of Open Access Journals (Sweden)

    Fabrizio Mazzetto

    2009-06-01

    Full Text Available The aim of this paper is the proposal of an innovative system for commercial transplanter to allow the automatic point-laying location of each vine cutting, without any kind of field preliminary squaring. A DGPS-RTK system is able to calculate the vine cutting location according to the project values; the transplant operation, carried out by electro-hydraulic and electro-mechanical components, is completely automated. The goal is to increase the work rate of the transplanting equipment and reduce the necessary skilled labour, without losing the accuracy of the vineyard planting.

  13. Pre-operational environmental monitoring plan for the Device Assembly Facility at the Nevada Test Site

    Energy Technology Data Exchange (ETDEWEB)

    Ferate, F.D.

    1995-01-01

    Nuclear explosives operations have been and may continue to be an important component of the DOE mission at the NTS. This mission has been to conduct the nation`s nuclear testing program in a safe, secure, and efficient manner while assuring full compliance with state and federal regulations, and DOE order`s and directives. These operations have generally included assembly, disassembly or modification, staging, transportation, and tesbng of nuclear explosive devices. They may also include maintenance, repair, retrofit, and surveillance. The Device Assembly Facility (DAF) was constructed to provide a dedicated facility in which to prepare nuclear explosives assemblies for their intended disposition. This facility will provide for combined operations (replacing two separate facilities) and incorporates state-of-the-art safety and security features while minimizing the risks of environmental impacts. The facility has been completed but not yet operated, so the impacts to be considered will b e based on normal operations and not on the impacts of construction activities. The impacts will arise from nuclear explosives operations that require the handling of high explosives in combination with special nuclear materials. Wastes from operation of the earlier device assembly facilities have included grams of epoxies, pints of solvents, and small quantities of waste explosives. These are hazardous (includes radioactive) wastes and are disposed of in accordance with state and federal regulations. Assuming similar operations at the DAF, non-hazardous (includes non-radioactive) solid waste would be transported to a permitted landfill. Waste explosives would be sent to the Area 11 Explosive Ordnance Disposal Unit. Other hazardous waste would be sent to the Area 5 Radioactive Waste.Management Site for shipment or burial.

  14. Design of automatic and uniform feeding system carried by workboat and effect test for raising river crab%河蟹养殖船载自动均匀投饵系统设计及效果试验

    Institute of Scientific and Technical Information of China (English)

    孙月平; 赵德安; 洪剑青; 张军; 李发忠

    2015-01-01

    between adjacent feeding travel was 8.21 m, feed sector angle was 80°, the workboat speed above and below the feeding travel were both 0.43 m/s, flow velocity of the feeder was 32.01 g/s, speed of the rotary table was 1480 r/min when the expected value of distribution density was 9 g/m2, and implementing trajectory tracking by GPS navigation device BD982. We conducted simulation of oblique throwing movement, feed average cumulative distribution density and distribution density variance, feeding contrast test between feeding device and artificial on the ground and feeding test on pond respectively. The results showed that the automatic feeding system can obtain good uniform feeding effect by working with the optimal operation parameters. The feed distribution uniformity of the automatic feeding system carried by workboat can be increased by three times than that with the artificial feeding, compared with the feed distribution density set value, the feed average distribution density relative error was 5.11%. In order to adapt the river crabs nocturnal habits, the automatic feeding can be performed in the night, one automatic feeding system carried by workboat could fine management about 6.67 hm2 crab pond which was equivalent to feeding with five rural labor force so that it would save manpower and increase efficient utilization of the feed. The automatic feeding system carried by workboat could make the feed utilization rate improved by more than 15%, resulting feed saving by more than 15% and crab output per unit area increased by more than 20%. At the same time, the automatic feeding system carried by workboat could perform timing; quantitative and uniform feeding which ensured that river crabs grow with equal size, as such improved the production and aquaculture area use efficiency. This research provides technology reference for further study of automatic uniform feeding on the whole pond in river crab aquaculture and other aquaculture needing for feeding along the

  15. 自动测试描述语言标准研究及其应用%Study on Automatic Test Markup Language (ATML) Standards And Its Application

    Institute of Scientific and Technical Information of China (English)

    康占祥; 戴嫣青; 杨占才

    2012-01-01

    Firstly, several major problems for automatic test markup language (ATML) standard are discussed, such as background, purpose, and model structure. Secondly, all the model definition methods and the expression manner for ATML standard are discussed, such as common, test results and session information markup language (TRML), diagnostics model markup language (DML), test description markup language (TDML), instrument description markup language (IDML), test configuration description markup language (TCML), UUT description markup language (UDML), test station markup language ( TSML), and test adapter markup language (TAML). Lastly, the automatic test system application method of ATML standards is introduced. The technology foundation is supplied for the testing resources share of the maintenance level.%分析了制定ATML标准的背景、目的及模型结构,并且对构成ATML标准所有子模型定义方法和表示方式进行了说明,其中主要包括通用要素模型(Common)、测试结果和会话信息模型(TRML)、诊断模型(DML)、测试描述模型(TDML)、仪器描述模型(IDML)、测试配置模型(TCML)、UUT描述模型(UDML)、测试站模型(TSML)及测试适配器模型(TAML)等,最后给出了ATML在自动测试系统中的应用方法,为实现武器装备各种维护级别的测试资源的共享奠定了技术基础.

  16. Lessons from wet gas flow metering systems using differential measurements devices: Testing and flow modelling results

    Energy Technology Data Exchange (ETDEWEB)

    Cazin, J.; Couput, J.P.; Dudezert, C. et al

    2005-07-01

    A significant number of wet gas meters used for high GVF and very high GVF are based on differential pressure measurements. Recent high pressure tests performed on a variety of different DP devices on different flow loops are presented. Application of existing correlations is discussed for several DP devices including Venturi meters. For Venturi meters, deviations vary from 9% when using the Murdock correlation to less than 3 % with physical based models. The use of DP system in a large domain of conditions (Water Liquid Ratio) especially for liquid estimation will require information on the WLR This obviously raises the question of the gas and liquid flow metering accuracy in wet gas meters and highlight needs to understand AP systems behaviour in wet gas flows (annular / mist / annular mist). As an example, experimental results obtained on the influence of liquid film characteristics on a Venturi meter are presented. Visualizations of the film upstream and inside the Venturi meter are shown. They are completed by film characterization. The AP measurements indicate that for a same Lockhart Martinelli parameter, the characteristics of the two phase flow have a major influence on the correlation coefficient. A 1D model is defined and the results are compared with the experiments. These results indicate that the flow regime influences the AP measurements and that a better modelling of the flow phenomena is needed even for allocation purposes. Based on that, lessons and way forward in wet gas metering systems improvement for allocation and well metering are discussed and proposed. (author) (tk)

  17. A New Device for Mechanical Testing of Blood Vessels at Cryogenic Temperatures

    Science.gov (United States)

    Jimenez Rios, Jorge L.; Rabin, Yoed

    2008-01-01

    As part of an ongoing program to study the thermo-mechanical effects associated with cryopreservation via vitrification (vitreous in Latin means glassy), the current study focuses on the development of a new device for mechanical testing of blood vessels at cryogenic temperatures. This device is demonstrated on a bovine carotid artery model, permeated with the cryoprotectant cocktail VS55 and a reference solution of 7.05M DMSO, below glass transition. Results are also presented for crystallized specimens, in the absence of cryoprotectants. Results indicate that the elastic modulus of a specimen with no cryoprotectant, at about −140°C (8.6°C and 15.5°C below the glass transition temperature of 7.05M DMSO and VS55, respectively), is 1038.8 ± 25.2 MPa, which is 8% and 3% higher than that of a vitrified specimen permeated with 7.05M DMSO and VS55, respectively. The elastic modulus of a crystallized material at −50°C is lower by ~20% lower from that at −140°C. PMID:18958183

  18. Development of a simple test device for spindle error measurement using a position sensitive detector

    Science.gov (United States)

    Liu, Chien-Hung; Jywe, Wen-Yuh; Lee, Hau-Wei

    2004-09-01

    A new spindle error measurement system has been developed in this paper. It employs a design development rotational fixture with a built-in laser diode and four batteries to replace a precision reference master ball or cylinder used in the traditional method. Two measuring devices with two position sensitive detectors (one is designed for the measurement of the compound X-axis and Y-axis errors and the other is designed with a lens for the measurement of the tilt angular errors) are fixed on the machine table to detect the laser point position from the laser diode in the rotational fixture. When the spindle rotates, the spindle error changes the direction of the laser beam. The laser beam is then divided into two separated beams by a beam splitter. The two separated beams are projected onto the two measuring devices and are detected by two position sensitive detectors, respectively. Thus, the compound motion errors and the tilt angular errors of the spindle can be obtained. Theoretical analysis and experimental tests are presented in this paper to separate the compound errors into two radial errors and tilt angular errors. This system is proposed as a new instrument and method for spindle metrology.

  19. Review of Mechanical Testing and Modelling of Thrombus Material for Vascular Implant and Device Design.

    Science.gov (United States)

    Johnson, S; Duffy, S; Gunning, G; Gilvarry, M; McGarry, J P; McHugh, P E

    2017-08-28

    A thrombus or blood clot is a solid mass, made up of a network of fibrin, platelets and other blood components. Blood clots can form through various pathways, for example as a result of exposed tissue factor from vascular injury, as a result of low flow/stasis, or in very high shear flow conditions. Embolization of cardiac or vascular originating blood clots, causing an occlusion of the neurovasculature, is the major cause of stroke and accounts for 85% of all stroke. With mechanical thrombectomy emerging as the new standard of care in the treatment of acute ischemic stroke (AIS), the need to generate a better understanding of the biomechanical properties and material behaviour of thrombus material has never been greater, as it could have many potential benefits for the analysis and performance of these treatment devices. Defining the material properties of a thrombus has obvious implications for the development of these treatment devices. However, to-date this definition has not been adequately established. While some experimentation has been performed, model development has been extremely limited. This paper reviews the previous literature on mechanical testing of thrombus material. It also explores the use of various constitutive and computational models to model thrombus formation and material behaviour.

  20. A wireless point-of-care testing system for the detection of neuron-specific enolase with microfluidic paper-based analytical devices.

    Science.gov (United States)

    Fan, Yan; Liu, Juntao; Wang, Yang; Luo, Jinping; Xu, Huiren; Xu, Shengwei; Cai, Xinxia

    2017-09-15

    Neuron-specific enolase (NSE) had clinical significance on diagnosis, staging, monitoring effect and judging prognosis of small cell lung cancer. Thus, there had a growing demand for the on-site testing of NSE. Here, a wireless point-of-care testing (POCT) system with electrochemical measurement for NSE detection was developed and verified. The wireless POCT system consisted of microfluidic paper-based analytical devices (μPADs), electrochemical detector and Android's smartphone. Differential pulse voltammetry (DPV) measurement was adopted by means of electrochemical detector which including a potentiostat and current-to-voltage converter. μPADs were modified with nanocomposites synthesized by Amino functional graphene, thionine and gold nanoparticles (NH2-G/Thi/AuNPs) as immunosensors for NSE detection. Combined with μPADs, the performance of the wireless POCT system was evaluated. The peak currents showed good linear relationship of the logarithm of NSE concentration ranging from 1 to 500ngmL(-1) with the limit of detection (LOD) of 10pgmL(-1). The detection results were automatically stored in EEPROM memory and could be displayed on Android's smartphone through Bluetooth in real time. The detection results were comparable to those measured by a commercial electrochemical workstation. The wireless POCT system had the potential for on-site testing of other tumor markers. Copyright © 2017 Elsevier B.V. All rights reserved.

  1. Direct Shear Tests of Sandstone Under Constant Normal Tensile Stress Condition Using a Simple Auxiliary Device

    Science.gov (United States)

    Cen, Duofeng; Huang, Da

    2017-06-01

    Tension-shear failure is a typical failure mode in the rock masses in unloading zones induced by excavation or river incision, etc., such as in excavation-disturbed zone of deep underground caverns and superficial rocks of high steep slopes. However, almost all the current shear failure criteria for rock are usually derived on the basis of compression-shear failure. This paper proposes a simple device for use with a servo-controlled compression-shear testing machine to conduct the tension-shear tests of cuboid rock specimens, to test the direct shear behavior of sandstone under different constant normal tensile stress conditions ( σ = -1, -1.5, -2, -2.5 and -3 MPa) as well as the uniaxial tension behavior. Generally, the fracture surface roughness decreases and the proportion of comminution areas in fracture surface increases as the change of stress state from tension to tension-shear and to compression-shear. Stepped fracture is a primary fracture pattern in the tension-shear tests. The shear stiffness, shear deformation and normal deformation (except the normal deformation for σ = -1 MPa) decrease during shearing, while the total normal deformation containing the pre-shearing portion increases as the normal tensile stress level (| σ|) goes up. Shear strength is more sensitive to the normal tensile stress than to the normal compressive stress, and the power function failure criterion (or Mohr envelope form of Hoek-Brown criterion) is examined to be the optimal criterion for the tested sandstone in the full region of tested normal stress in this study.

  2. Reliability of a new supination resistance measurement device and validation of the manual supination resistance test.

    Science.gov (United States)

    Griffiths, Ian B; McEwan, Islay M

    2012-01-01

    Kinematic observations are inconsistent in predicting lower-extremity injury risk, and research suggests that kinetic variables may be more important in this regard. Before kinetics can be prospectively investigated, we need reliable ways of measuring them clinically. A measurement instrument was manufactured that closely mirrors a manual test used to clinically estimate supination resistance force. The reliability of the instrument and the validity of the clinical test were investigated. The left feet of 26 healthy individuals (17 men and 9 women; mean ± SD age, 25.9 ± 9.2 years; mean ± SD weight, 77.7 ± 13.3 kg) were assessed. Foot Posture Index (FPI-6), manual supination resistance, and machine supination resistance were measured. Intrarater and interrater reliability of all of the measurements were calculated. Correlations of the supination resistance measured by the device with FPI-6, the manual supination resistance test, and body weight were investigated. Interrater reliability of all of the measurements was generally poor. The supination resistance machine correlated highly with the manual supination test for the rater experienced with its use. Supination resistance measurements correlated poorly with the FPI-6 and weakly with body weight. The supination resistance machine was shown to have sufficient limits of agreement for the study, but improvements need to be made for more meaningful research going forward. In this study, the force required to supinate a foot was independent of its posture, and approximately 12% of it was explained by body weight. Further work is required with a much larger sample size to build regression models that sufficiently predict supination resistance force and that will be of clinical use. The manual supination test is a valid clinical test for clinicians experienced in its use.

  3. 箱梁钢筋定位自动检测装置%The automatic detection device for box girder reinforced positioning

    Institute of Scientific and Technical Information of China (English)

    邵云

    2014-01-01

    In order to reduce or eliminate the box girder quality oroblems caused by box girder reinforced orotection layer and ore-stressed oosi-tioning network reinforced deformation and installation not in olace,this oaoer researched the reinforced oositioning of reinforced orotective layer and ore-stressed oositioning network in oost tensioned ore-stressed box beam construction orocess,designed a set of automatic detection each ten-sioned oositioning detection ooint tensioned whether accuracy oositioning or not and disolayed the tensioned oositioning automatic detection de-vice,solved the oroblem of reinforced oositioning detection.%为了减少或消除因箱梁钢筋保护层及预应力定位网钢筋形变和安装不到位而引起箱梁质量问题,对后张法预应力箱梁施工工艺中的钢筋保护层及预应力定位网的钢筋定位进行了研究,设计了一套能自动检测各检测点钢筋是否定位准确并显示的钢筋定位自动检测装置,解决了钢筋定位检测的问题。

  4. Electrostatic protocol treatment lens. The purpose of this device is to transport Antiprotons from the new ELENA storage beam to all AD experiments. The electrostatic device was successfully tested in ASACUSA two weeks ago.

    CERN Multimedia

    Maximilien Brice

    2012-01-01

    Electrostatic protocol treatment lens. The purpose of this device is to transport Antiprotons from the new ELENA storage beam to all AD experiments. The electrostatic device was successfully tested in ASACUSA two weeks ago.

  5. Automatic testing technology for thermal batteries%单体热电池多参数自动检测技术

    Institute of Scientific and Technical Information of China (English)

    秦琴

    2014-01-01

    为了解决热电池检测技术中人工操作精度低、效率低、可操作性差等问题,介绍了一种单体热电池多参数自动检测技术。该技术采用计算机控制多台检测仪器和机械手臂,并设计单体热电池自动检测软件系统,实现了热电池多参数检测过程全自动化,具有检测精度高、效率高、能适应不同型号和功率的热电池测试等优势。%In order to solve the problems of low precision, low speed and lack of maneuverability in manual operation in thermal batteries testing techniques, an automatic testing system based on LabVIEW was introduced. Ful automatic testing process was realized and the system had high precision, high speed and good adaptability in different type of thermal-batteries.

  6. Study on Influence of Distributed Small Hydropower on Automatic Control Device of Distribution Network%分布式小水电对配电网自动控制装置的影响研究

    Institute of Scientific and Technical Information of China (English)

    邹浩斌

    2012-01-01

      Qualitative and simulation analysis is conducted aiming at the impact of the distributed small hydropower access power distribution system on network automatic control device, and the solution is discussed. The results show that the distributed access of small hydropower changes the topology structure and trend direction of the distribution network, when some path generates instantaneous failure, coincidence failure of automatic reclosing can be caused, thereby generating continuous power-cut, when the system fails to generate power-down, the standby cast device can generate error movement or refused movement due to the supporting effect of the small hydropower unit strong excitation on the bus voltage. Through analysis and study, the technology improvement measures capable of adapting to distribution network automatic reclosing and standby casting devices with distributed smallhydropowerareproposed, thereby improving the security, stability and power supply reliability of the power grid.%  针对分布式小水电接入配电系统对网络自动控制装置的影响进行了定性和仿真分析,并讨论了解决方法。结果表明,分布式小水电的接入改变了配电网的拓扑结构和潮流方向,当某段线路发生瞬时性故障时会引起自动重合闸的重合失败而导致停电延续;当系统发生故障掉电时,备自投装置则因小水电机组强励对母线电压的支撑作用而发生误动或拒动。通过分析研究,提出了能够适应有分布式小水电存在的配电网自动重合闸及备自投装置的技术改进措施,以提高电网的安全稳定性和供电可靠性。

  7. 基于全景温度场的电力设备在线自动识别与诊断%Online Automatic Recognition and Diagnosis of Electrical Devices via Thermal Panorama

    Institute of Scientific and Technical Information of China (English)

    吕俊; 王福田; 汤进; 罗斌

    2015-01-01

    Aiming at solving the problem of online automatic recognition and thermal diagnosis of electrical devices, this paper proposes an online automatic device recognition and diagnosis method based on the stitched thermal panorama.Firstly, we collect some thermal infrared images of the scene and stitch them based on SIFT to construct the thermal panorama in an offline fashion. The categories of devices in the scene are further manually annotated.Secondly, given a thermal image captured online, we locate and identify the devices of this thermal image by utilizing the feature matching algorithm, and then effectively diagnose these de-vices based on their categories.Finally, experiments on the real substation scenarios demonstrate the effectiveness and practica-bility of the proposed approach.%为了解决在线自动识别电力设备并进行相应热故障诊断问题,提出一种基于全景温度场的变电站设备在线自动识别与诊断方法。首先,离线采集若干变电站的红外热像,通过基于SIFT特征的图像拼接方法对这些热像进行拼接,构建变电站全景温度场,并手动标注全景温度场中的设备。其次,对于一幅在线的包含特定设备的热红外热像,在已构建的全景温度场中通过特征匹配的方式自动定位该设备,进而有效地对设备进行识别,然后依据设备类型自动诊断热故障的发生。最后,在真实的变电站场景中进行实验,验证了本文方法的有效性和实用性。

  8. Two-Stage Over-the-Air (OTA Test Method for LTE MIMO Device Performance Evaluation

    Directory of Open Access Journals (Sweden)

    Ya Jing

    2012-01-01

    Full Text Available With MIMO technology being adopted by the wireless communication standards LTE and HSPA+, MIMO OTA research has attracted wide interest from both industry and academia. Parallel studies are underway in COST2100, CTIA, and 3GPP RAN WG4. The major test challenge for MIMO OTA is how to create a repeatable scenario which accurately reflects the MIMO antenna radiation performance in a realistic wireless propagation environment. Different MIMO OTA methods differ in the way to reproduce a specified MIMO channel model. This paper introduces a novel, flexible, and cost-effective method for measuring MIMO OTA using a two-stage approach. In the first stage, the antenna pattern is measured in an anechoic chamber using a nonintrusive approach, that is without cabled connections or modifying the device. In the second stage, the antenna pattern is convolved with the chosen channel model in a channel emulator to measure throughput using a cabled connection.

  9. IN VITRO TESTING – AN ESENTIAL METHOD FOR EVALUATING THE PERFORMANCE OF DENTAL MATERIALS AND DEVICES

    Directory of Open Access Journals (Sweden)

    Anca VIŢALARIU

    2015-06-01

    Full Text Available Dentistry is unique among biomaterials specialties as to the large variety of materials used, and nature of the challenges they must resist. Intra-oral service demands materials adapted to a warm and moist environment, resisting the attack of digestive acids and enzymes. The materials subjected to mechanical forces should preserve their strength, fatigue and wear characteristics, for accomplishing their function. The wide range of materials available for restorative dentistry demands knowledge of their relative strengths and trade-offs, and offers the opportunity for many interesting lines of research. The spectrum extensively ranges from elastic impression materials to extremely stiff metal and ceramic appliances, so that familiarity with a variety of mechanical testing situations is required from a well-rounded dental materials laboratory. Evaluating the mechanical and wear characteristics of dental restorative materials and analyzing the durability of adhesives is critical to the development of improved dental devices

  10. Deformable microparticles with multiple functions for drug delivery and device testing

    Science.gov (United States)

    Thula, Taili T.

    Since the HIV epidemic of the 1990s, researchers have attempted to develop a red blood cell analog. Even though some of these substitutes are now in Phase III of clinical trials, their use is limited by side effects and short half-life in the human body. As a result, there is still a need for an effective erythrocyte analog with minimum immunogenic and side effects, so that it can be used for multiple applications. Finding new approaches to develop more efficient blood substitutes will not only bring valuable advances in the clinical approach, but also in the area of in vitro testing of medical devices. We examined the feasibility of creating a deformable multi-functional, biodegradable, biocompatible particle for applications in drug delivery and device testing. As a preliminary evaluation, we synthesized different types of microcapsules using natural and synthetic polymers, various cross-linking agents, and diverse manufacturing techniques. After fully characterizing of each system, we determined the most promising red blood cell analog in terms of deformability, stability and toxicity. We also examined the encapsulation and release of bovine serum albumin (BSA) within these deformable particles. After removal of cross-linkers, zinc- and copper-alginate microparticles surrounded by multiple polyelectrolyte layers of chitosan oligosaccharide and alginate were deformable and remained stable under physiological pressures applied by the micropipette technique. In addition, multiple coatings decreased toxicity of heavy-metal crosslinked particles. BSA encapsulation and release from chitosan-alginate microspheres were contingent on the crosslinker and number of polyelectrolyte coatings, respectively. Further rheological studies are needed to determine how closely these particles simulate the behavior of erythrocytes. Also, studies on the encapsulation and release of different proteins, including hemoglobin, are needed to establish the desired controlled release of

  11. Environmental assessment for device assembly facility operations, Nevada Test Site, Nye County, Nevada. Final report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-05-01

    The U.S. Department of Energy, Nevada Operations Office (DOE/NV), has prepared an environmental assessment (EA), (DOE/EA-0971), to evaluate the impacts of consolidating all nuclear explosive operations at the newly constructed Device Assembly Facility (DAF) in Area 6 of the Nevada Test Site. These operations generally include assembly, disassembly or modification, staging, transportation, testing, maintenance, repair, retrofit, and surveillance. Such operations have previously been conducted at the Nevada Test Site in older facilities located in Area 27. The DAF will provide enhanced capabilities in a state-of-the-art facility for the safe, secure, and efficient handling of high explosives in combination with special nuclear materials (plutonium and highly enriched uranium). Based on the information and analyses in the EA, DOE has determined that the proposed action would not constitute a major federal action significantly affecting the quality of the human environment within the meaning of the National Environmental Policy Act of 1969 (42 U.S.C. 4321 et seq.). Therefore, an environmental impact statement is not required, and DOE is issuing this finding of no significant impact.

  12. Developing a press for static and dynamic testing of orthopedic devices and biological tissue

    Directory of Open Access Journals (Sweden)

    Arlex Leyton Virgen

    2010-05-01

    Full Text Available This paper describes designing and constructing a test machine having a 1,800 N capacity and maximum 3 Hz frequency which will be used in static and dynamic testing of biological tissues and orthopedic devices such as external fixers. It consists of an oc-tagonal base with 500 mm distance between faces and a crosshead which slides between two columns (useful 350 mm opening thus allowing changing the height (maximum 600 mm according to the size of the specimen to be tested. A ball screw actuator is mounted over the crosshead which transforms a servomotor’s rotating movement into a lineal movement (maximum 150 mm stroke. First validations indicated that the machine performed within the design parameters. This project shows that the techno-logy required for supporting research is possible in developing countries thereby avoiding dependence on foreign companies for supporting, maintaining and updating equipment. Some conditions were also produced for the evolution of mechanical engi-neering in Colombia.

  13. Astrodynamical Space Test of Relativity Using Optical Devices i (astrod i) — Mission Overview

    Science.gov (United States)

    Selig, Hanns; Lämmerzahl, Claus; Ni, Wei-Tou

    2013-01-01

    ASTROD I is the first planned space mission in a series of ASTROD missions for testing relativity in space using optical devices. The main aims are (i) to test general relativity with an improvement of three orders of magnitude compared to current results, (ii) to measure solar and solar system parameters with improved accuracy, (iii) to test the constancy of the gravitational constant and in general to get a deeper understanding of gravity. The first ideas for the ASTROD missions go back to the last century when new technologies in the area of laser physics and time measurement began to appear on the horizon. ASTROD is a mission concept that is supported by a broad international community covering the areas of space technology, fundamental physics, high performance laser and clock technology and drag-free control. While ASTROD I is a single-spacecraft concept that performs measurements with pulsed laser ranging between the spacecraft and earthbound laser ranging stations, ASTROD-GW is planned to be a three spacecraft mission with inter-spacecraft laser ranging. ASTROD-GW would be able to detect gravitational waves at frequencies below the eLISA/NGO bandwidth. As a third step Super-ASTROD with larger orbits could even probe primordial gravitational waves. This paper gives an overview on the basic principles especially for ASTROD I.

  14. Astrodynamical Space Test of Relativity using Optical Devices I (ASTROD I) - Mission Overview

    CERN Document Server

    Selig, Hanns; Ni, Wei-Tou

    2012-01-01

    ASTROD I is the first planned space mission in a series of ASTROD missions for testing relativity in space using optical devices. The main aims are: (i) to test General Relativity with an improvement of three orders of magnitude compared to current results, (ii) to measure solar and solar system parameters with improved accuracy, (iii) to test the constancy of the gravitational constant and in general to get a deeper understanding of gravity. The first ideas for the ASTROD missions go back to the last century when new technologies in the area of laser physics and time measurement began to appear on the horizon. ASTROD is a mission concept that is supported by a broad international community covering the areas of space technology, fundamental physics, high performance laser and clock technology and drag free control. While ASTROD I is a single-spacecraft concept that performes measurements with pulsed laser ranging between the spacecraft and earthbound laser ranging stations, ASTROD-GW is planned to be a three...

  15. An approach for assessment of water quality using semipermeable membrane devices (SPMDs) and bioindicator tests

    Science.gov (United States)

    Petty, J.D.; Jones, S.B.; Huckins, J.N.; Cranor, W.L.; Parris, J.T.; McTague, T.B.; Boyle, T.P.

    2000-01-01

    As an integral part of our continued development of water quality assessment approaches, we combined integrative sampling, instrumental analysis of widely occurring anthropogenic contaminants, and the application of a suite of bioindicator tests as a specific part of a broader survey of ecological conditions, species diversity, and habitat quality in the Santa Cruz River in Arizona, USA. Lipid-containing semipermeable membrane devices (SPMDs) were employed to sequester waterborne hydrophobic chemicals. Instrumental analysis and a suite of bioindicator tests were used to determine the presence and potential toxicological relevance of mixtures of bioavailable chemicals in two major water sources of the Santa Cruz River. The SPMDs were deployed at two sites; the effluent weir of the International Wastewater Treatment Plant (IWWTP) and the Nogales Wash. Both of these systems empty into the Santa Cruz River and the IWWTP effluent is a potential source of water for a constructed wetland complex. Analysis of the SPMD sample extracts revealed the presence of organochlorine pesticides (OCs), polychlorinated biphenyls (PCBs), and polycyclic aromatic hydrocarbons (PAHs). The bioindicator tests demonstrated increased liver enzyme activity, perturbation of neurotransmitter systems and potential endocrine disrupting effects (vitellogenin induction) in fish exposed to the extracts. With increasing global demands on limited water resources, the approach described herein provides an assessment paradigm applicable to determining the quality of water in a broad range of aquatic systems.

  16. Design of Automatic Testing System for Active Phased Array Antenna%有源相控阵天线自动测试系统设计

    Institute of Scientific and Technical Information of China (English)

    熊毅; 符伟; 钱林; 何诚; 陶成忠

    2012-01-01

    Aimed at multi-channel, large amount of testing data, low test efficiency in T/R module test of active phased array antenna, we designed an automatic test system for active phased array antenna, which adapts to testing large amount of T/R modules. The system controls VNA and gathers data from it via GPIB or ethernet and fully uses strong ability of modern computer for processing and analyzing data. It not only solves the problems of trouble diagnosis and automatic calibration of active phased array, but also improves the work efficiency and saves human cost. Results of actual application show that the test system works stably, and is easy to operate, it can meet the demands for measuring T/R module.%针对现代有源相控阵雷达天线T/R组件测试通路多、测试数据处理量大、测试效率低的特点,设计了一种适用于大规模T/R组件测试的有源相控阵天线自动测试系统.该系统设计通过GPIB接口或以太网对VNA(矢量网络分析仪)进行访问控制与数据采集,充分利用了现代计算机强大的数据处理与分析能力,不仅解决了有源相控阵天线故障诊断与自动校正问题,而且还极大地提高了工作效率,节约了人力成本.实际应用表明:该测试系统工作稳定,使用方便,能够充分满足T/R组件测试需要.

  17. Review of automatic renal biopsy device under Truguide needle guided in 178 patients%使用同轴穿刺引导针肾穿刺活检178例体会

    Institute of Scientific and Technical Information of China (English)

    张晶晶; 刘桂凌; 郝丽; 姜凡; 解翔; 王德光

    2013-01-01

    Automatic renal biopsy device under Truguide needle guided were performed on 178 patients with nephropathy, Renal biopsies were successfully performed totally, and mean numbers of glomerulus were ( 18. 0 ± 1.1) per patient. And there was no prominent incidence of complications. The method has the advantages in easy manipulation, higher successful rate and lower incidence of complications.%在B超实时定位下,使用同轴穿刺引导针对178例患者肾脏穿刺活检,穿刺顺利,平均肾小球(18.0±7.7)个,全部获得成功,无明显并发症.结果 表明在超声实时定位下,使用同轴穿刺引导针行经皮肾穿刺活检是一种安全、有效的方法.

  18. Aerodynamic drag reduction tests on a full-scale tractor-trailer combination with several add-on devices

    Energy Technology Data Exchange (ETDEWEB)

    Montoya, L.C.; Steers, L.L.

    1974-12-01

    Aerodynamic drag tests were performed on a conventional cab-over-engine tractor with a 45-foot trailer and five commercially available or potentially available add-on devices using the coast-down method. The tests ranged in velocity from approximately 30 miles per hour to 65 miles per hour and included some flow visualization. A smooth, level runway at Edwards Air Force Base was used for the tests, and deceleration measurements were taken with both accelerometers and stopwatches. An evaluation of the drag reduction results obtained with each of the five add-on devices is presented.

  19. Testing objective measures of motor impairment in early Parkinson's disease: Feasibility study of an at-home testing device.

    Science.gov (United States)

    Goetz, Christopher G; Stebbins, Glenn T; Wolff, David; DeLeeuw, William; Bronte-Stewart, Helen; Elble, Rodger; Hallett, Mark; Nutt, John; Ramig, Lorraine; Sanger, Terence; Wu, Allan D; Kraus, Peter H; Blasucci, Lucia M; Shamim, Ejaz A; Sethi, Kapil D; Spielman, Jennifer; Kubota, Ken; Grove, Andrew S; Dishman, Eric; Taylor, C Barr

    2009-03-15

    We tested the feasibility of a computer based at-home testing device (AHTD) in early-stage, unmedicated Parkinson's disease (PD) patients over 6 months. We measured compliance, technical reliability, and patient satisfaction to weekly assessments of tremor, small and large muscle bradykinesia, speech, reaction/movement times, and complex motor control. relative to the UPDRS motor score. The AHTD is a 6.5'' x 10'' computerized assessment battery. Data are stored on a USB memory stick and sent by internet to a central data repository as encrypted data packets. Although not designed or powered to measure change, the study collected data to observe patterns relative to UPDRS motor scores. Fifty-two PD patients enrolled, and 50 completed the 6 month trial, 48 remaining without medication. Patients complied with 90.6% of weekly 30-minute assessments, and 98.5% of data packets were successfully transmitted and decrypted. On a 100-point scale, patient satisfaction with the program at study end was 87.2 (range: 80-100). UPDRS motor scores significantly worsened over 6 months, and trends for worsening over time occurred for alternating finger taps (P = 0.08), tremor (P = 0.06) and speech (P = 0.11). Change in tremor was a significant predictor of change in UPDRS (P = 0.047) and was detected in the first month of the study. This new computer-based technology offers a feasible format for assessing PD-related impairment from home. The high patient compliance and satisfaction suggest the feasibility of its incorporation into larger clinical trials, especially when travel is difficult and early changes or frequent data collection are considered important to document.

  20. Patch Testing for Evaluation of Hypersensitivity to Implanted Metal Devices: A Perspective From the American Contact Dermatitis Society.

    Science.gov (United States)

    Schalock, Peter C; Crawford, Glen; Nedorost, Susan; Scheinman, Pamela L; Atwater, Amber Reck; Mowad, Christen; Brod, Bruce; Ehrlich, Alison; Watsky, Kalman L; Sasseville, Denis; Silvestri, Dianne; Worobec, Sophie M; Elliott, John F; Honari, Golara; Powell, Douglas L; Taylor, James; DeKoven, Joel

    2016-01-01

    The American Contact Dermatitis Society recognizes the interest in the evaluation and management of metal hypersensitivity reactions. Given the paucity of robust evidence with which to guide our practices, we provide reasonable evidence and expert opinion-based guidelines for clinicians with regard to metal hypersensitivity reaction testing and patient management. Routine preoperative evaluation in individuals with no history of adverse cutaneous reactions to metals or history of previous implant-related adverse events is not necessary. Patients with a clear self-reported history of metal reactions should be evaluated by patch testing before device implant. Patch testing is only 1 element in the assessment of causation in those with postimplantation morbidity. Metal exposure from the implanted device can cause sensitization, but a positive metal test does not prove symptom causality. The decision to replace an implanted device must include an assessment of all clinical factors and a thorough risk-benefit analysis by the treating physician(s) and patient.

  1. Automatic search for fMRI connectivity mapping: an alternative to Granger causality testing using formal equivalences among SEM path modeling, VAR, and unified SEM.

    Science.gov (United States)

    Gates, Kathleen M; Molenaar, Peter C M; Hillary, Frank G; Ram, Nilam; Rovine, Michael J

    2010-04-15

    Modeling the relationships among brain regions of interest (ROIs) carries unique potential to explicate how the brain orchestrates information processing. However, hurdles arise when using functional MRI data. Variation in ROI activity contains sequential dependencies and shared influences on synchronized activation. Consequently, both lagged and contemporaneous relationships must be considered for unbiased statistical parameter estimation. Identifying these relationships using a data-driven approach could guide theory-building regarding integrated processing. The present paper demonstrates how the unified SEM attends to both lagged and contemporaneous influences on ROI activity. Additionally, this paper offers an approach akin to Granger causality testing, Lagrange multiplier testing, for statistically identifying directional influence among ROIs and employs this approach using an automatic search procedure to arrive at the optimal model. Rationale for this equivalence is offered by explicating the formal relationships among path modeling, vector autoregression, and unified SEM. When applied to simulated data, biases in estimates which do not consider both lagged and contemporaneous paths become apparent. Finally, the use of unified SEM with the automatic search procedure is applied to an empirical data example.

  2. Radiation Test Results on COTS and non-COTS Electronic Devices for NASA-JSC Space Flight Projects

    Science.gov (United States)

    Allums, Kimberly K.; O'Neill, P. M.; Reddell, B. D.; Nguyen, K. V.; Bailey, C. R.

    2012-01-01

    This presentation reports the results of recent proton and heavy ion Single Event Effect (SEE) testing on a variety of COTS and non-COTs electronic devices and assemblies tested for the Space Shuttle, International Space Station (ISS) and Multi-Purpose Crew Vehicle (MPCV).

  3. The viability of hearing protection device fit-testing at navy and marine corps accession points

    Directory of Open Access Journals (Sweden)

    Jeremy Federman

    2016-01-01

    Full Text Available Introduction: The viability of hearing protection device (HPD verification (i.e., fit-testing on a large scale was investigated to address this gap in a military accession environment. Materials and Methods: Personal Attenuation Ratings (PARs following self-fitted (SELF-Fit HPDs were acquired from 320 US Marine Corps training recruits (87.5% male, 12.5% female across four test protocols (1-, 3-, 5-, and 7- frequency. SELF-Fit failures received follow-up to assess potential causes. Follow-up PARs were acquired (Experimenter fit [EXP-Fit], followed by Subject re-fit [SUB Re-Fit]. EXP-Fit was intended to provide a perception (dubbed “ear canal muscle memory” of what a correctly fitted HPD should feel like. SUB Re-Fit was completed following EXP-Fit to determine whether a training recruit could duplicate EXP-Fit on her/his own without assistance. Results: A one-way analysis of variance (ANOVA (N = 320 showed that SELF-Fit means differed significantly between protocols (P 60% pass rates. Results showed that once recruits experienced how HPDs should feel when inserted correctly, they were able to properly replicate the procedure with similar results to the expert fit suggesting “ear canal muscle memory” may be a viable training strategy concomitant with HPD verification. Fit-test duration was also measured to examine the tradeoff between results accuracy and time required to complete each protocol. Discussion: Results from this study showed the critical importance of initial selection and fitting of HPDs followed by verification (i.e., fit-testing at Navy and Marine Corps accession points. Achieving adequate protection from an HPD is fundamentally dependent on obtaining proper fit of the issued HPD as well as the quality of training recruits receive regarding HPD use.

  4. An SCM Control-based Design of Automatic Feeding Device in Punching Machine%基于单片机控制的冲压机床自动供料装置设计

    Institute of Scientific and Technical Information of China (English)

    甄久军; 杨战民; 孙勇震

    2012-01-01

    This paper provides a mechanical body design for automatic feeding device (AFD) and the control scheme based on SCM. The AFD takes the movements of the plunger chip as a power source, by the slider mechanism and the ratchet pawl mechanism, and re- alizes the circumrotated-intermission feeding mode. SCM automatically performs the functions of cutting down time of the power of the machine tool motor, counting the supplies and warning of short supplies. The device supports the punching machine to work continuous- ly, can greatly increase productivity and extend the life of the punching machine brake belt, while avoiding the workers' hands directly into the die stamping workspace security incidents that may arise.%提供了自动送料装置的机械本体设计和单片机的控制方案。自动送料装置采用冲压机床冲头的上下运动作为动力源,通过滑块机构、棘轮棘爪机构,实现冲头的上下运动到棘轮水平回转一间歇送料方式。单片机控制实现自动切断机床电机电源停机、供料计数、缺料报警等功能。该装置支持冲压机床连续工作,可大大提高生产率并延长冲压机床制动皮带的寿命,同时避免了工人手部直接进入模具冲压工作区而可能出现的安全事故。

  5. Comparative Study between Sequential Automatic and Manual Home Respiratory Polygraphy Scoring Using a Three-Channel Device: Impact of the Manual Editing of Events to Identify Severe Obstructive Sleep Apnea

    Directory of Open Access Journals (Sweden)

    Glenda Ernst

    2015-01-01

    Full Text Available Objective. According to current guidelines, autoscoring of respiratory events in respiratory polygraphy requires manual scoring. The aim of this study was to evaluate the agreement between automatic analysis and manual scoring to identify patients with suspected OSA. Methods. This retrospective study analyzed 791 records from respiratory polygraphy (RP performed at home. The association grade between automatic scoring and manual scoring was evaluated using Kappa coefficient and the agreement using Bland and Altman test and intraclass correlation coefficient (CCI. To determine the accuracy in the identification of AHI≥30 eV/h, the ROC curve analysis was used. Results. The population analyzed consisted of 493 male (62.3% and 298 female patients, with an average age of 54.7±14.20 years and BMI of 32.7±8.21 kg/m2. There was no significant difference between automatic and manual apnea/hypopnea indexes (aAHI, mAHI: aAHI 17.25 (SD: 17.42 versus mAHI 21.20±7.96 (p; NS. The agreement between mAHI and aAHI to AHI≥30 was 94%, with a Kappa coefficient of 0.83 (p<0.001 and a CCI of 0.83. The AUC-ROC, sensitivity, and specificity were 0.99 (CI 95%: 0.98-0.99, p<0.001, 86% (CI 95%: 78.7–91.4, and 97% (CI 95%: 96–98.3, respectively. Conclusions. We observed good agreement between automatic scoring and sequential manual scoring to identify subjects with AHI≥30 eV/h.

  6. 基于函数解析的卫星测试数据自动判读%Automatic Interpretation of Satellite Test Data Based on Analytic Function

    Institute of Scientific and Technical Information of China (English)

    汪洋; 徐犇; 曾齐; 唐琪佳; 叶晖

    2016-01-01

    以某在轨故障诊断课题为研究背景,针对目前卫星测试系统遥测数据判读主要依靠人工完成,效率低,可靠性低,对测试进度影响较大,还消耗大量人力的问题,通过调研卫星遥测值变化规律以及现有遥测数据判读方式,提出一种开放的判读函数编译平台,并在平台上实现了遥测数据的自动判读,提高了测试效率,减少了人力消耗,有利于实现在轨监测和卫星测试的自动化。%This paper takes an on-board fault diagnosis subject as the research background.Nowadays the satellite test system mainly relies on human for the telemetry data interpretation,which leads to low efficiency and low reliability and has big influence on the test progress with great manpower consumption.Though the research on the variation regularity and present interpretation mode of satellite telemetry data,we propose an open complier platform with interpretation function and realize the automatic inter-pretation of satellite test data on the platform,which improve the test efficiency with lower manpower consumption.This paper is helpful to realize automatic on-orbit monitoring and satellite testing.

  7. Development of Automatic Test Equipment of Energy-efficiency of Induction Cooker%电磁灶能效自动检测设备的研制

    Institute of Scientific and Technical Information of China (English)

    张佳峥; 陈剑

    2014-01-01

    为提高电磁灶能效测试数据的准确性、可靠性和一致性,本文研制了一款电磁灶能效自动检测设备。该设备依据GB 21456《家用电磁灶能效限定值及能源效率等级》规定的测试方法及测试要求开发而成,采用PLC编程及控制技术,将测试用水降温用制冷系统、升温用电热系统、水温测试铂电阻、精密功率计、电子秤等分立单元有效结合起来,实现电磁灶热效率及待机功率的自动检测。%In order to improve the accuracy, reliability, and consistency of energy efficiency test data of household induction cookers, the automatic test equipment of energy efficiency of household induction cookers is developed. This equipment is developed based on the test method and test requirement of GB 21456 ,“Minimum allowable values of the energy efficiency and energy efficiency grades for household induction cookers”. The equipment adopts PLC programming and control technology, and effectively combined the discrete units such as test-used water cooling and heating refrigeration system, electric heating system, temperature measurement of Pt resistance, precision power meter, and x electronic scale so as to achieve the automatic detection of heat efficiency and standby power.

  8. Calibration of an automated California mastitis test with focus on the device-dependent variation.

    Science.gov (United States)

    Neitzel, Anne-Christin; Stamer, Eckhard; Junge, Wolfgang; Thaller, Georg

    2014-01-01

    The aim of the paper was to estimate the accuracy of the metrology of an installed indirect on-line sensor system based on the automated California Mastitis Test (CMT) with focus on the prior established device-dependent variation. A sensor calibration was implemented. Therefore, seven sensors were tested with similar trials on the dairy research farm Karkendamm (Germany) on two days in July 2011 and January 2012. Thereby, 18 mixed milk samples from serial dilutions were fourfold recorded at every sensor. For the validation, independent sensor records with corresponding lab somatic cell score records (LSCS) in the period between both trials were used (n = 1,357). From these records for each sensor a polynomial regression function was calculated. The predicted SCS (PSCS) was obtained for each sensor with the previously determined regression coefficients. Pearson correlation coefficients between PSCS and LSCS were established for each sensor and ranged between r = 0.57 and r = 0.67. Comparing the results with the correlation coefficients between the on-line SCS (OSCS) and the LSCS (r = 0.20 to 0.57) for every sensor, the calibration showed the tendency to improve the installed sensor system.

  9. Factors determining patients’ intentions to use point-of-care testing medical devices for self-monitoring: the case of international normalized ratio self-testing

    Science.gov (United States)

    Shah, Syed Ghulam Sarwar; Barnett, Julie; Kuljis, Jasna; Hone, Kate; Kaczmarski, Richard

    2013-01-01

    Purpose To identify factors that determine patients’ intentions to use point-of-care medical devices, ie, portable coagulometer devices for self-testing of the international normalized ratio (INR) required for ongoing monitoring of blood-coagulation intensity among patients on long-term oral anticoagulation therapy with vitamin K antagonists, eg, warfarin. Methods A cross-sectional study that applied the technology-acceptance model through a self-completed questionnaire, which was administered to a convenience sample of 125 outpatients attending outpatient anticoagulation services at a district general hospital in London, UK. Data were analyzed using descriptive statistics, factor analyses, and structural equation modeling. Results The participants were mainly male (64%) and aged ≥ 71 years (60%). All these patients were attending the hospital outpatient anticoagulation clinic for INR testing; only two patients were currently using INR self-testing, 84% of patients had no knowledge about INR self-testing using a portable coagulometer device, and 96% of patients were never offered the option of the INR self-testing. A significant structural equation model explaining 79% of the variance in patients’ intentions to use INR self-testing was observed. The significant predictors that directly affected patients’ intention to use INR self-testing were the perception of technology (β = 0.92, P < 0.001), trust in doctor (β = −0.24, P = 0.028), and affordability (β = 0.15, P = 0.016). In addition, the perception of technology was significantly affected by trust in doctor (β = 0.43, P = 0.002), age (β = −0.32, P < 0.001), and affordability (β = 0.23, P = 0.013); thereby, the intention to use INR self-testing was indirectly affected by trust in doctor (β = 0.40), age (β = −0.29), and affordability (β = 0.21) via the perception of technology. Conclusion Patients’ intentions to use portable coagulometers for INR self-testing are affected by patients

  10. Test of a device for accelerated ageing of polymeric material in high concentrated sunlight at the DLR solar furnace

    Energy Technology Data Exchange (ETDEWEB)

    Witzke, A.; Neumann, A.; Kaluza, J. [German Aerospace Center (DLR), Solar Energy Technology, Cologne (Germany); Demuth, M.; Ritterskamp, P. [Max-Planck-Inst. fuer Strahlenchemie, Muelheim a.d.R. (Germany)

    2001-07-01

    Within this study the design and first tests of a device for accelerated ageing with high concentrated sunlight have been described. Firstly, the device was designed for testing samples of lacquer for the car industry. It is based on two points: first, the photochemical effect that the ageing of polymers is mainly initiated by the UV solar radiation and, second, on the idea to accelerate the ageing process by increasing the UV radiation dose. Therefore the concentrated sunlight at the DLR Solar Furnace is filtered by a cold-mirror that reflects the radiation with a wavelength below 450 nm onto the samples. The samples are fixed in a chamber where they can simultaneously be wetted by a spraying device. The first tests show that this device enables us to radiate the relevant samples with a high UV radiation intensity without overheating them. During one day irradiation at the DLR Solar Furnace in March 2001 we reach an UV radiation dose which is about sixteen times higher than the dose after 24 hours irradiation in common used weathering devices. Further tests at the DLR Solar Furnace have to examine in what way this increased radiation dose leads to a high accelerated ageing of the polymeric material. (orig.)

  11. Complex plasma experimental device – A test bed for studying dust vortices and other collective phenomena

    Indian Academy of Sciences (India)

    MANJIT KAUR; SAYAK BOSE; P K CHATTOPADHYAY; J GHOSH; Y C SAXENA

    2016-12-01

    A typical device for carrying out sophisticated and complex dusty plasma experiments is designed, fabricated and made operational at the Institute for Plasma Research, India. The device is named as complex plasma experimental device (CPED). The main aim of this multipurpose machine is to study the formation and behaviour of dust vortices in the absence of external magnetic field under the effect of various plasma parameters. Further, the device is equipped with advanced imaging diagnostics for studying many other interesting phenomena such as dust oscillations, three-dimensional crystalline structures, dust rotation, etc. The device is quite flexible to accommodate many innovative experiments. Detailed design of the device, its diagnostics capabilities and theadvanced image analysis techniques are presented in this paper.

  12. Automatic Reading

    Institute of Scientific and Technical Information of China (English)

    胡迪

    2007-01-01

    <正>Reading is the key to school success and,like any skill,it takes practice.A child learns to walk by practising until he no longer has to think about how to put one foot in front of the other.The great athlete practises until he can play quickly,accurately and without thinking.Ed- ucators call it automaticity.

  13. Study and Test of Cold Storage Heat Recovery Heat Pump Coupled Solar Drying Device

    OpenAIRE

    Min Li; Xiao-Qiang Jiang; Bao-Chuan Wu

    2013-01-01

    In this study, we design the recovery of a heat pump combined solar drying device. Then, with this device, drying experiments of aquatic product, tilapia, were conducted, indicating that the newly designed device functions are well in temperature adjusting and controlling performance and showing that drying time is closely related to energy consumption and drying conditions. Heat recovery heat pump combined solar energy drier can improve the drying quality of aquatic products, but also can gr...

  14. Development and Testing of a Device to Increase the Level of Automation of a Conventional Milking Parlor through Vocal Commands

    Directory of Open Access Journals (Sweden)

    Mauro Zaninelli

    2017-01-01

    Full Text Available A portable wireless device with a “vocal commands” feature for activating the mechanical milking phase in conventional milking parlors was developed and tested to increase the level of automation in the milking procedures. The device was tested in the laboratory and in a milking parlor. Four professional milkers participated in the experiment. Before the start of the tests, a set of acoustic models with speaker-dependent commands defined for the project was acquired for each milker using a dedicated “milker training procedure”. Two experimental sessions were performed by each milker, with one session in the laboratory and a subsequent session in the milking parlor. The device performance was evaluated based on the accuracy demonstrated in the vocal command recognition task and rated using the word recognition rate (WRR. The data were expressed as %WRR and grouped based on the different cases evaluated. Mixed effects logistic regression modeling was used to evaluate the association between the %WRR and explanatory variables. The results indicated significant effects due to the location where the tests were performed. Higher values of the %WRR were found for tests performed in the laboratory, whereas lower values were found for tests performed in the milking parlor (due to the presence of background noise. Nevertheless, the general performance level achieved by the device was sufficient for increasing the automation level of conventional milking parlors.

  15. Study and Test of Cold Storage Heat Recovery Heat Pump Coupled Solar Drying Device

    Directory of Open Access Journals (Sweden)

    Min Li

    2013-05-01

    Full Text Available In this study, we design the recovery of a heat pump combined solar drying device. Then, with this device, drying experiments of aquatic product, tilapia, were conducted, indicating that the newly designed device functions are well in temperature adjusting and controlling performance and showing that drying time is closely related to energy consumption and drying conditions. Heat recovery heat pump combined solar energy drier can improve the drying quality of aquatic products, but also can greatly reduce the drying energy consumption, which provides theoretical support to the design and processing of heat recovery heat pump of refrigeration system coupled solar drying device.

  16. Estimation of the two-dimensional presampled modulation transfer function of digital radiography devices using one-dimensional test objects.

    Science.gov (United States)

    Wells, Jered R; Dobbins, James T

    2012-10-01

    The modulation transfer function (MTF) of medical imaging devices is commonly reported in the form of orthogonal one-dimensional (1D) measurements made near the vertical and horizontal axes with a slit or edge test device. A more complete description is found by measuring the two-dimensional (2D) MTF. Some 2D test devices have been proposed, but there are some issues associated with their use: (1) they are not generally available; (2) they may require many images; (3) the results may have diminished accuracy; and (4) their implementation may be particularly cumbersome. This current work proposes the application of commonly available 1D test devices for practical and accurate estimation of the 2D presampled MTF of digital imaging systems. Theory was developed and applied to ensure adequate fine sampling of the system line spread function for 1D test devices at orientations other than approximately vertical and horizontal. Methods were also derived and tested for slit nonuniformity correction at arbitrary angle. Techniques were validated with experimental measurements at ten angles using an edge test object and three angles using a slit test device on an indirect-detection flat-panel system [GE Revolution XQ∕i (GE Healthcare, Waukesha, WI)]. The 2D MTF was estimated through a simple surface fit with interpolation based on Delaunay triangulation of the 1D edge-based MTF measurements. Validation by synthesis was also performed with simulated images from a hypothetical direct-detection flat-panel device. The 2D MTF derived from physical measurements yielded an average relative precision error of 0.26% for frequencies below the cutoff (2.5 mm(-1)) and approximate circular symmetry at frequencies below 4 mm(-1). While slit analysis generally agreed with the results of edge analysis, the two showed subtle differences at frequencies above 4 mm(-1). Slit measurement near 45° revealed radial asymmetry in the MTF resulting from the square pixel aperture (0.2 mm × 0

  17. 一种轻量级软件自动化测试框架%A Lightweight-Level Software Automatic Test Framework

    Institute of Scientific and Technical Information of China (English)

    赵建平; 刘晓阳; 赵建辉; 李清梅; 段慧芬

    2014-01-01

    针对自动化测试脚本和测试数据文件数据量多的问题,利用测试工具QTP、数据与关键字驱动的测试机制,设计了基于三层驱动机制的自动化测试框架、管理测试用例文件的测试集(TestSet),以及存储测试用例的test-case数据对象和存储测试数据的testdata数据对象;利用对测试粒度的控制和测试数据池技术应用,设计了可重构和优化的测试脚本。达到了测试设计和脚本开发解耦,测试用例和数据的展现更加人性化,测试脚本及业务层面的测试数据的优化、可重用,使脚本文件和测试数据文件的数量达到最少,减少占用空间。%To resolve the problem of a large amount of automatic test scripts and test data files, through the test tool QTP,data-driven and keyword-driven testing mechanism,a test automation framework based on three layer data-driven mechanism is designed,including the design of the TestSet managing test case files,the design of the testcase storing test cases and the design of the testdata storing test data; through controlling the test scale and applying the test data pool,reconfigurable and optimization of test scripts are designed.The methods above can decouple the test design and the script development,make test cases and data show a more humane design,and test scripts and test data on the business level optimized and reusable,the number of script files and the test data files reache a minimum,reduce the occupied space.

  18. Design of Energy-efficient and Automatic Power-off Lamp Control Device%节能自动断电的电灯控制装置设计

    Institute of Scientific and Technical Information of China (English)

    昌晶; 汪洋; 兰月; 郭娜霜; 胡奎; 王洪亮

    2013-01-01

    In this paper ,we design an automatic power-off lamp control device based on the view of energy saving .which is controlled mainly by single chip microcomputer and supplemented by interrelated electronic circuitry ,using the bidirectional thyristor which con-catenated in electric circuits ,when the power suddenly stop and the power supply start again ,and switch is still in the closed state ,the control device can make the lamp lights for a second ,then power off ,in order to remind the users of that the power has been restored , which solve the problem of “People are not in the light”%  从节能角度设计了一种节能自动断电的电灯控制装置。该装置以单片机为控制核心,辅以相关性的电子电路器件,利用串接在电灯回路中的双向晶闸管,实现突然停电后再次来电时,控制装置可使电灯发光1 s提示用户来电后熄灭,解决了“人不在灯长明”的问题。

  19. Novel device to sample the esophageal microbiome--the esophageal string test.

    Directory of Open Access Journals (Sweden)

    Sophie A Fillon

    Full Text Available A growing number of studies implicate the microbiome in the pathogenesis of intestinal inflammation. Previous work has shown that adults with esophagitis related to gastroesophageal reflux disease have altered esophageal microbiota compared to those who do not have esophagitis. In these studies, sampling of the esophageal microbiome was accomplished by isolating DNA from esophageal biopsies obtained at the time of upper endoscopy. The aim of the current study was to identify the esophageal microbiome in pediatric individuals with normal esophageal mucosa using a minimally invasive, capsule-based string technology, the Enterotest™. We used the proximal segment of the Enterotest string to sample the esophagus, and term this the "Esophageal String Test" (EST. We hypothesized that the less invasive EST would capture mucosal adherent bacteria present in the esophagus in a similar fashion as mucosal biopsy. EST samples and mucosal biopsies were collected from children with no esophageal inflammation (n = 15 and their microbiome composition determined by 16S rRNA gene sequencing. Microbiota from esophageal biopsies and ESTs produced nearly identical profiles of bacterial genera and were different from the bacterial contents of samples collected from the nasal and oral cavity. We conclude that the minimally invasive EST can serve as a useful device for study of the esophageal microbiome.

  20. Radiation Hardness tests with neutron flux on different Silicon photomultiplier devices

    Science.gov (United States)

    Cattaneo, P. W.; Cervi, T.; Menegolli, A.; Oddone, M.; Prata, M.; Prata, M. C.; Rossella, M.

    2017-07-01

    Radiation hardness is an important requirement for solid state readout devices operating in high radiation environments common in particle physics experiments. The MEG II experiment, at PSI, Switzerland, investigates the forbidden decay μ+ → e+ γ. Exploiting the most intense muon beam of the world. A significant flux of non-thermal neutrons (kinetic energy Ek>= 0.5 MeV) is present in the experimental hall produced along the beam-line and in the hall itself. We present the effects of neutron fluxes comparable to the MEG II expected doses on several Silicon Photomultiplier (SiPMs). The tested models are: AdvanSiD ASD-NUV3S-P50 (used in MEG II experiment), AdvanSiD ASD-NUV3S-P40, AdvanSiD ASD-RGB3S-P40, Hamamatsu and Excelitas C30742-33-050-X. The neutron source is the thermal Sub-critical Multiplication complex (SM1) moderated with water, located at the University of Pavia (Italy). We report the change of SiPMs most important electric parameters: dark current, dark pulse frequency, gain, direct bias resistance, as a function of the integrated neutron fluency.

  1. Performance of a continuous flow ventricular assist device: magnetic bearing design, construction, and testing.

    Science.gov (United States)

    Allaire, P; Hilton, E; Baloh, M; Maslen, E; Bearnson, G; Noh, D; Khanwilkar, P; Olsen, D

    1998-06-01

    A new centrifugal continuous flow ventricular assist device, the CFVAD III, which is fully magnetic bearing suspended, has been developed. It has only one moving part (the impeller), has no contact (magnetic suspension), is compact, and has minimal heating. A centrifugal impeller of 2 inch outer diameter is driven by a permanent magnet brushless DC motor. This paper discusses the design, construction, testing, and performance of the magnetic bearings in the unit. The magnetic suspension consists of an inlet side magnetic bearing and an outlet side magnetic bearing, each divided into 8 pole segments to control axial and radial displacements as well as angular displacements. The magnetic actuators are composed of several different materials to minimize size and weight while having sufficient load capacity to support the forces on the impeller. Flux levels in the range of 0.1 T are employed in the magnetic bearings. Self sensing electronic circuits (without physical sensors) are employed to determine the impellar position and provide the feedback control signal needed for the magnetic bearing control loops. The sensors provide position sensitivity of approximately 0.025 mm. A decentralized 5 axis controller has been developed using modal control techniques. Proportional integral derivative controls are used for each axis to levitate the magnetically supported impeller.

  2. Medical chilling device designed for hypothermic hydration graft storage system: Design, thermohydrodynamic modeling, and preliminary testing

    Energy Technology Data Exchange (ETDEWEB)

    Seo, Jung Hwan [Hongik University, Seoul (Korea, Republic of)

    2015-02-15

    Hypothermic hydration graft storage is essential to reduce the metabolic demand of cells in vitro. The alleviated metabolic demands reduce the emergence rate of anaerobic metabolism generating adenosine triphosphate (ATP) energy that creates free radicals. The cessive free radicals can damage cells and tissues due to their highly oxidative power with molecules. Current cooling systems such as a conventional air cooling system and an ice pack system are inappropriate for chilling cell tissues in vitro because of inconvenience in use and inconsistent temperature sustainability caused by large size and progressive melting, respectively. Here, we develop a medical chilling device (MCD) for hypothermic hydration graft storage based on thermo-hydrodynamic modeling and thermal electric cooling technology. Our analysis of obtained hydrodynamic thermal behavior of the MCD revealed that the hypothermic condition of 4 .deg. C was continuously maintained, which increased the survival rates of cells in vitro test by reduced free radicals. The validated performance of the MCD promises future development of an optimal hypothermic hydration graft storage system designed for clinical use.

  3. Durability test device for MR fluids with permanent magnet and V-shaped groove

    Science.gov (United States)

    Abe, Isao; Kikuchi, Takehito; Noma, Junichi

    2017-05-01

    Magnetorheological fluids (MRFs) are functional fluids whose viscosity changes when magnetic fields are applied. Therefore, these fluids are used in force and torque controllable devices. However, particle sedimentation is one of the drawbacks of conventional MRFs. To solve this problem, Kurimoto Co. Ltd developed a new fluid with sub-micron order Fe particles and a silicone-based solvent known as NanoMRF. The particle distributions of this material are stable over several months. However, its durability has not yet been fully discussed. Therefore, we developed new equipment to test endurance and examined the durability of the magnetorheological effect of the NanoMRF as well as a commercially available MRF. Our results show that the durability of the fluids was affected by the stability of the solvent. In particular, the durability is drastically improved when the solvent is supplemented by the peripheral sealing oil. The oxidation of particles is remarkably varied by the kind of solvent as well as the stability of the oxidation film on the surface of the particles. The energy of the collapse and reproduction of the particles was used not only to generate friction among the particles but also to decompose the solvent molecules.

  4. Space Station and Shuttle Payloads: Rack Insertion Device Pneumatic Assembly Setup and Test

    Science.gov (United States)

    Conde, Nathan

    2007-01-01

    As part of my KSC summer internship, I was given the very cool task of writing a test preparation sheet (TPS). A TPS is a set of instructions for certain procedures or tasks, and serves as the documentation for the tasks. TPSs guide task leaders and technicians throughout the work procedures, safely, informing them of what steps will be hazardous, what precautions must be taken, and what to do in the case of an accident or emergency. I was placed in Boeing's Resupply & Return Division (R&R). R&R is responsible for sending up food and supplies to the International Space Station (ISS) with the use of three Italian Multi Purpose Logistics Modules - Leonardo, Donatello, and Raffaello. The supplies are loaded into Resupply Stowage Racks (RSRs) or Resupply Stowage Platforms (RSPs) (though, both are usually referred to as racks), depending on their size and shape. These racks are loaded into the modules with the help of a specialized crane known as the Rack Insertion Device (RID). The RID rests on four pneumatic air jacks, these allow for an operator to raise or lower the RID. The pneumatic air system supplies the air jacks with the necessary air pressure required to lift the RID.

  5. Final report on the in situ testing of electrical components and devices at TMI-2

    Energy Technology Data Exchange (ETDEWEB)

    Soberano, F T

    1984-06-01

    A total of 88 electrical components and devices were in situ tested. Of these, 11 totally failed and 21 suffered degradation that varied from mild to severe. The equipment that failed or incurred severe degradation was located in areas of known environmental extremes. Several motor operated valves in the Reactor Building basement failed because of submersion in water. Others severely degraded from contamination tracking, resulting in the alteration of their circuit electrical characteristics - a circumstance that could compromise their designed function. One backup oil lift pump motor for a reactor coolant pump motor, although located well above the Reactor Building basement high water mark, failed because of a break in its armature and field circuits; this failure was surmised to be a result of corrosion. The limit switch of a Class 1E solenoid valve likewise failed due to moisture intrusion. Components that noticeably degraded exhibited anomalies, likely due to the incursion of moisture, that varied from high capacitance to increased circuit resistance. The effect of the other degenerating conditions that existed during the accident, such as high temperature, high radiation levels, and the hydrogen burn, could not be evaluated individually or synergistically.

  6. 3D-FBK Pixel sensors: recent beam tests results with irradiated devices

    CERN Document Server

    Micelli, A; Sandaker, H; Stugu, B; Barbero, M; Hugging, F; Karagounis, M; Kostyukhin, V; Kruger, H; Tsung, J W; Wermes, N; Capua, M; Fazio, S; Mastroberardino, A; Susinno, G; Gallrapp, C; Di Girolamo, B; Dobos, D; La Rosa, A; Pernegger, H; Roe, S; Slavicek, T; Pospisil, S; Jakobs, K; Kohler, M; Parzefall, U; Darbo, G; Gariano, G; Gemme, C; Rovani, A; Ruscino, E; Butter, C; Bates, R; Oshea, V; Parker, S; Cavalli-Sforza, M; Grinstein, S; Korokolov, I; Pradilla, C; Einsweiler, K; Garcia-Sciveres, M; Borri, M; Da Via, C; Freestone, J; Kolya, S; Lai, C H; Nellist, C; Pater, J; Thompson, R; Watts, S J; Hoeferkamp, M; Seidel, S; Bolle, E; Gjersdal, H; Sjobaek, K N; Stapnes, S; Rohne, O; Su, D; Young, C; Hansson, P; Grenier, P; Hasi, J; Kenney, C; Kocian, M; Jackson, P; Silverstein, D; Davetak, H; DeWilde, B; Tsybychev, D; Dalla Betta, G F; Gabos, P; Povoli, M; Cobal, M; Giordani, M P; Selmi, L; Cristofoli, A; Esseni, D; Palestri, P; Fleta, C; Lozano, M; Pellegrini, G; Boscardin, M; Bagolini, A; Piemonte, C; Ronchin, S; Zorzi, N; Hansen, T E; Hansen, T; Kok, A; Lietaer, N; Kalliopuska, J; Oja, A

    2011-01-01

    The Pixel detector is the innermost part of the ATLAS experiment tracking device at the Large Hadron Collider (LHC), and plays a key role in the reconstruction of the primary and secondary vertices of short-lived particles. To cope with the high level of radiation produced during the collider operation, it is planned to add to the present three layers of silicon pixel sensors which constitute the Pixel Detector, an additional layer (Insertable B-Layer, or IBL) of sensors. 3D silicon sensors are one of the technologies which are under study for the IBL. 3D silicon technology is an innovative combination of very-large-scale integration (VLSI) and Micro-Electro-Mechanical-Systems (MEMS) where electrodes are fabricated inside the silicon bulk instead of being implanted on the wafer surfaces. 3D sensors, with electrodes fully or partially penetrating the silicon substrate, are currently fabricated at different processing facilities in Europe and USA. This paper reports on the 2010 June beam test results for irradi...

  7. 非平面运动球式自动平衡装置稳定性分析%Stability Analysis of Ball-type Automatic Balancer Devices with Non-plane Motion

    Institute of Scientific and Technical Information of China (English)

    罗建; 谭青; 江波

    2016-01-01

    In the actual production, since imbalance moment is acting on the high-speed rotor, the whole shaft will produce a spatial motion, which can lead to non-plane motion of the rotor. In this paper, based on the Lagrange equation and Newton’s law, a mathematical model of the ball-type automatic balancer device with non-plane motion was established. In order to obtain the possible stable solution of the mathematical model, perturbation method and Rolls-Hurwitz criterion were adopted to analyze the stability of the system. Through this analysis, it was found that there exists the stable solution for the automatic balancer device in the cases of one ball or two balls. And the vibration of the system under different condition can be obtained. The device has stable solutions at over-critical speed, and it can also counterpoise the unbalanced force under certain conditions to reduce the vibration.%在实际生产工作中,高速运动转子由于受到不平衡力矩作用,会使整个转轴产生空间转动,这种转动使得转子产生非平面运动。采用拉格朗日方程和牛顿定律,建立一种非平面运动球式自动平衡装置数学模型;通过摄动法和劳斯-霍尔维茨判据对其可能使系统稳定的解进行分析,得出该自动平衡装置分别在1个球和2个球的情况下存在能够使系统稳定的解以及系统在不同条件下振动情况。该装置在过临界转速下存在稳定点,在一定条件下能对不平衡力进行平衡,达到减振目的。

  8. 基于GPIB的数字电路自动测试系统研究%Research of an automatic digital circuit test system based on GPIB

    Institute of Scientific and Technical Information of China (English)

    靳取; 方晖; 柏业超

    2016-01-01

    The application of digital circuits has gone deep into various aspects of daily lives and productions. Nowadays,digital systems are becoming more and more complex,which increase the complexity and difficulty of testing the digital circuits.As an important and effective method,automatic test of digital circuits has been extensively studied for testing complex digital circuits.Therefore,we propose an automatic digital circuit test system based on the Universal Serial Bus(USB)and the General Purpose Interface Bus(GPIB)in this paper.The design of the automatic test system can be divided into two parts:the hardware and the software.The hardware of the system includes computer,GPIB converter,USB digital I/O modules and test machines with GPIB interface.Buses are the medium of information transmission between the computer and other equipment.Owing to the widely use of USB and GPIB,we select USB and GPIB to connect all the modules of the hardware.The computer is the core of the hard-ware,which controls the I/O module and the test machines with GPIB interface via the USB interface.The computer also plays the role of processing the current test data and displaying the result of the test.Software of the system is based on LabVIEW and developed in the form of graphic program.With LabVIEW,we can quickly create the software front panel and call the hardware modules in need.The software consists of applications and database. Structure of the applications can be described as “major module+functional plugs”.Content of the major module is fixed while content of the function plugs is flexible.The applications contain the major part of the automatic test system,not j ust functional test module of the digital circuits,but also the fault isolation module and etc.The applications rely on the database.Microsoft Access is selected to work as the database software.The actual working process of the system is also introduced in this paper besides the hardware and software.Generation of

  9. Fatigue Test of Cytochrome C Self-Assembled on a 11-MUA Layer Based on Electrochemical Analysis for Bioelectronic Device.

    Science.gov (United States)

    Lee, Taek; Chung, Yong-Ho; Chen, Qi; Min, Junhong; Choi, Jeong-Woo

    2015-08-01

    A cytochrome c/11-MUA heterolayer was fabricated to analyze its electrochemical characteristics in harsh conditions for a stable bioelectronic device. Since a cytochrome c/11-MUA heterolayer has been applied to construct the bioelectronics device such as non-volatile biomemory device, an understanding of electrochemical property of the heterolayer in harsh conditions such as variation of temperature and pH, and repetition of usage is necessary to manufacture a stable platform of bioelectronic device. Cytochrome c, a metalloprotein to have a heme group, was self-assembled on the Au surface via the chemical linker 11-mercaptoundecanoic acid (11-MUA). Immobilization of the heterolayer was confirmed by surface-enhanced Raman spectroscopy (SERS) and scanning tunneling microscopy (STM). The fatigue test was done by investigating the redox properties based on cyclic voltammetry (CV) of the heterolayer. The retention time test and pH dependence, thermal test of the fabricated heterolayer were conducted by CV, which showed that the fabricated film retained redox properties for more than 33 days, and from pH 5.0 to pH 9.0, from 15 °C to 55 °C. Taken together, our results show that a cytochrome c/11-MUA heterolayer is very stable, which could be used as a platform of bioelectronic device.

  10. Testing a Novel 3D Printed Radiographic Imaging Device for Use in Forensic Odontology.

    Science.gov (United States)

    Newcomb, Tara L; Bruhn, Ann M; Giles, Bridget; Garcia, Hector M; Diawara, Norou

    2017-01-01

    There are specific challenges related to forensic dental radiology and difficulties in aligning X-ray equipment to teeth of interest. Researchers used 3D printing to create a new device, the combined holding and aiming device (CHAD), to address the positioning limitations of current dental X-ray devices. Participants (N = 24) used the CHAD, soft dental wax, and a modified external aiming device (MEAD) to determine device preference, radiographer's efficiency, and technique errors. Each participant exposed six X-rays per device for a total of 432 X-rays scored. A significant difference was found at the 0.05 level between the three devices (p = 0.0015), with the MEAD having the least amount of total errors and soft dental wax taking the least amount of time. Total errors were highest when participants used soft dental wax-both the MEAD and the CHAD performed best overall. Further research in forensic dental radiology and use of holding devices is needed.

  11. Design and Development of a Miniaturized Percutaneously Deployable Wireless Left Ventricular Assist Device: Early Prototypes and Feasibility Testing.

    Science.gov (United States)

    Letzen, Brian; Park, Jiheum; Tuzun, Zeynep; Bonde, Pramod

    2017-09-21

    The current left ventricular assist devices (LVADs) are limited by a highly invasive implantation procedure in a severely unstable group of advanced heart failure patients. Additionally, the current transcutaneous power drive line acts as a nidus for infection resulting in significant morbidity and mortality. In an effort to decrease this invasiveness and eliminate drive line complications, we have conceived a wireless miniaturized percutaneous LVAD, capable of being delivered endovascularly with a tether-free operation. The system obviates the need for a transcutaneous fluid purge line required in existing temporary devices by utilizing an incorporated magnetically coupled impeller for a complete seal. The objective of this article was to demonstrate early development and proof-of-concept feasibility testing to serve as the groundwork for future formalized device development. Five early prototypes were designed and constructed to iteratively minimize the pump size and improve fluid dynamic performance. Various magnetic coupling configurations were tested. Using SolidWorks and ANSYS software for modeling and simulation, several geometric parameters were varied. HQ curves were constructed from preliminary in vitro testing to characterize the pump performance. Bench top tests showed no-slip magnetic coupling of the impeller to the driveshaft up to the current limit of the motor. The pump power requirements were tested in vitro and were within the appropriate range for powering via a wireless energy transfer system. Our results demonstrate the proof-of-concept feasibility of a novel endovascular cardiac assist device with the potential to eventually offer patients an untethered, minimally invasive support.

  12. 医用硬性内窥镜光学性能检测系统的设计与研究%Introduction of optical performance testing device for medical rigid endoscope

    Institute of Scientific and Technical Information of China (English)

    姬军; 蒋昌松; 王云龙; 侯纯伟; 黄增跃

    2013-01-01

    目的:设计一种医用硬性内窥镜光学性能定量检测系统。方法:该检测系统包括导轨、旋转台、均匀光源、支杆、视频采集装置、计算机等硬件设备以及精密测试标靶,利用视觉技术测量医用硬性内窥镜光学性能。结果:当均匀光源照射测试标靶时视频采集装置通过医用硬性内窥镜采集图像,并通过计算机进行处理得到该医用硬性内窥镜光学性能参数。结论:医用硬性内窥镜光学性能定量检测系统相对于现有技术能够一体化、自动和定量地检测医用硬性内窥镜各项光学性能参数。%Objective:To design optical performance testing device for medical rigid endoscope. Methods: This system includes guide, rotating table, uniform light source, testing target, strut, video acquisition device and computer. Results: When uniform light source irradiates testing target, the video acquisition device collects images through medical rigid endoscope and processing optical performance parameters through the computer. Conclusion:The testing device can acquire optical performance parameters for medical rigid endoscope integrated automatically, quantitatively relative to the existing device.

  13. MEMS Device for Quantitative In Situ Mechanical Testing in Electron Microscope

    Directory of Open Access Journals (Sweden)

    Xiaodong Wang

    2017-01-01

    Full Text Available In this work, we designed a micro-electromechanical systems (MEMS device that allows simultaneous direct measurement of mechanical properties during deformation under external stress and characterization of the evolution of nanomaterial microstructure within a transmission electron microscope. This MEMS device makes it easy to establish the correlation between microstructure and mechanical properties of nanomaterials. The device uses piezoresistive sensors to measure the force and displacement of nanomaterials qualitatively, e.g., in wire and thin plate forms. The device has a theoretical displacement resolution of 0.19 nm and a force resolution of 2.1 μN. The device has a theoretical displacement range limit of 5.47 μm and a load range limit of 55.0 mN.

  14. BORILAIN. Mobile device for automatic continuous supply of liquid injection system backup of a nuclear plant in emergency; BORILAIN. Dispositivo movil para el abastecimiento automatico en continuo del sistema de inyeccion del liquido de reserva de una central nuclear en situacion de emergencia

    Energy Technology Data Exchange (ETDEWEB)

    Lacalle, J.; Traino, J.; Troeung, J.; Arnaldos, A.; Alcaraz, D. A.; Lopez, B.; Ponce, A. T.

    2014-07-01

    This paper presents the design and development of the first automatic mobile device for the preparation of a neutron absorbing solution, and providing continuous, 30 days, of the injection system liquid reserve of a nuclear emergency. The work has been developed by GD Energy Services (GDES) for Electricite de France (EDF). (Author)

  15. Automatic Vacuum Flushing Technology for Combined Sewer Solids: Laboratory Testing and Proposed Improvements (WERF Report INFR7SG09)

    Science.gov (United States)

    This research study included an extensive literature review on existing sewer sediment flushing technologies. An innovative vacuum flush system previously developed by the U.S. EPA was tested under laboratory conditions. The tests revealed a strong correlation between the strengt...

  16. 基于DSP的光电测试设备自动调平研究%Research on Automatic-leveling for Photoelectric Test Equipments Based on DSP

    Institute of Scientific and Technical Information of China (English)

    李成; 宁琦

    2012-01-01

    针对各类光电测试设备的调平需求,在调平理论分析的基础上,提出了一种通用的四点支撑自动调平方案,给出了硬件及软件设计,可用于各类光电测试设备的自动调平。自动调平系统将倾角传感器、控制器和调平机构融合成一个有机整体,根据精密倾角传感器提供的倾角数值,利用角度误差调平理论,将支腿的移动量换算成驱动步进电机所需的脉冲数,由DSP产生脉冲信号驱动电机带动丝杆自动伸缩调整设备至水平状态,具有调平快速、准确、可靠的特点,具有良好的应用价值。%According to the leveling requirements of the different photoelectric test equipments, on the basis of analyzing the leveling theory, a general four-point automatic leveling solution is proposed, and the hardware and software designs are given, which can be used in the automatic leveling of all kinds of photoelectric test equipments. Automatic leveling system can integrate obliquity sensors, controller and leveling mechanism into an organic whole, according to the dip angle from the precise obliquity sensors and the leveling angle error theory, the outrigger displacement is converted to the required numbers of pulses which drive the stepping motor. The pulse signal which can be used to drive the motors is generated from the DSP controller, so the equipment can be adjusted to level by the screw retraction. This solution is rapid, accurate and reliable, which has the good value.

  17. 基于ATML的自动测试系统软件体系结构%Research on Automatic Test System Software Architecture Based on ATML

    Institute of Scientific and Technical Information of China (English)

    薛玉军; 肖明清; 杨召; 喻芳

    2014-01-01

    为解决现有自动测试系统软件体系结构耦合紧密、层次划分不规范、开放性不高、可移植性和可重用性不强等问题,首先从框架和组件标准等方面对 ATML 体系结构进行了研究和分析,然后综合利用软件工程领域SOA与 Web Services 技术、B/S 结构的设计思想,提出了一种基于ATML的测试软件体系结构,并从逻辑视图、开发视图及进程视图3个角度对其进行建模和描述。在某型综合测试系统中,以该体系结构为基础开发了某型导弹的测试软件,经验证该软件在该综合测试系统中运行稳定可靠,较好地完成了某型导弹测试任务,具有层次化、模块化、松耦合和易移植等优点。%In order to solve the existing problems of ATS software architecture,such as tight coupling,un-clear layer arrangement,weak openness,bad portability and reusability etc,the framework and compo-nent standards of automatic test markup language are discussed and analyzed firstly.And then,according to the idea of services oriented architecture,web services technology and the browser/server structure,the architecture of the ATML-based test software is built and described from logic view,develop view and process view.In a certain integrated test system,an automatic test software for a certain type of missile is developed based on the ATML software architecture.The result shows that the test software is stable and reliable in the missile test process,and has the charateristics of modularization,clear layers,loose cou-pling and good portability.

  18. An acceptance test method of error test units in automatic verifcation system for current transformers%电流互感器自动化检定系统误差试验单元验收方法

    Institute of Scientific and Technical Information of China (English)

    周杭军; 李建

    2015-01-01

    介绍了母线式电流互感器和复匝式电流互感器进行全自动的检定试验方法.通过对误差试验单元的分析,并结合JJF 1033-2014《计量标准考核规范》的相关要求,深入探讨和研究了误差试验单元的验收方法和技术路线.%This article introduces an automatic verification test method for busbar type current transformers and the complex coil type current transformers. Through the analysis of the error test units and the relevant requirements of JJF 1033-2010"Rule for the Examination of Measurement Standard", an acceptance test method and technical route of the error test units are discussed and researched.

  19. AT ML测试资源与测试需求自动匹配方法研究%Study of Test Resources and Test Requirements Automatic Matching Method in ATML

    Institute of Scientific and Technical Information of China (English)

    范书义; 姜会霞; 魏保华; 王成

    2016-01-01

    In the process of test program automatic generation based on ATML test description documents,the key is to realize the auto-matic matching of test resources and test requirements.Firstly,the basic data elements,such as ATML test ability,test requirement, switch,port,capability and resource mapping,are analyzed,and the corresponding C++ data types are defined.Then,based on the theory of graph theory,the representation method of the test path is analyzed,and the adjacency matrix is used to represent the test path.Finally, on the basis of above research,a test capabilities and test requirements matching algorithm based on sparse matrix and single linked list is proposed.The automatic matching of test capabilities and test requirements is realized.The algorithm has been applied to the development of real test program.The result shows that the algorithm can realize the automatic matching of test resource and test requirements based on ATML description documents.It also can greatly improve the efficiency of the test program development.%基于ATML测试描述文档自动生成测试程序过程中,关键是实现测试资源与测试需求的自动匹配;首先对ATML 测试描述文档中测试能力、测试需求、开关、端口、能力与资源的映射等基本数据元素的表示方法进行分析研究,定义了与其对应的C++数据类型;然后在研究图论相关理论的基础上,分析了描述文档中测试路径的表示方法,确定了采用邻接矩阵表示测试路径的方法;最后,在以上研究的基础上,提出了以稀疏矩阵和单链表为基础的测试能力与测试需求匹配算法,实现了测试能力与测试需求的自动匹配;该算法在实际测试程序开发中得到了应用,结果表明该算法能够实现基于ATML描述文档的测试资源与测试需求自动匹配,并能极大提供测试程序开发效率。

  20. Description of a digital computer simulation of an Annular Momentum Control Device (AMCD) laboratory test model

    Science.gov (United States)

    Woolley, C. T.; Groom, N. J.

    1981-01-01

    A description of a digital computer simulation of an Annular Momentum Control Device (AMCD) laboratory model is presented. The AMCD is a momentum exchange device which is under development as an advanced control effector for spacecraft attitude control systems. The digital computer simulation of this device incorporates the following models: six degree of freedom rigid body dynamics; rim warp; controller dynamics; nonlinear distributed element axial bearings; as well as power driver and power supply current limits. An annotated FORTRAN IV source code listing of the computer program is included.