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Thematische Bibliographien / Computer controlled testing / Zeitschriftenartikel

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Zeitschriftenartikel zum Thema „Computer controlled testing“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 9. Februar 2022

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1

Kuiper, A. C. J., R. E. F. Einerhand und W. Visscher. „Computer controlled testing of batteries“. Computers & Chemistry 13, Nr. 1 (Januar 1989): 69–73. http://dx.doi.org/10.1016/0097-8485(89)80030-0.

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2

SEVERNS, MATTHEW L. „A Computer Controlled Attenuator for Audiological Testing“. Journal of Clinical Engineering 10, Nr. 4 (Oktober 1985): 317–22. http://dx.doi.org/10.1097/00004669-198510000-00007.

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3

Shafer, Steven L., Lawrence C. Siegel, James E. Cooke und James C. Scott. „Testing Computer-controlled Infusion Pumps by Simulation“. Anesthesiology 68, Nr. 2 (01.02.1988): 261–66. http://dx.doi.org/10.1097/00000542-198802000-00013.

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4

K. M. Coyne, A. T. Johnson und L. R. Soma. „Computer-controlled Rebreathing System for Equine Exercise Testing“. Transactions of the ASAE 39, Nr. 5 (1996): 1863–68. http://dx.doi.org/10.13031/2013.27664.

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5

Rybalev, A. N. „IMPLEMENTATION AND COMPUTER MODELING OF DISTURBANCE COMPENSATION ALGORITHMS FOR PROGRAMMABLE LOGICAL CONTROLLERS“. Informatika i sistemy upravleniya 4 (2020): 37–48. http://dx.doi.org/10.22250/isu.2020.66.37-48.

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The paper proposes approaches to the software implementation of disturbance compensation systems on programmable logic controllers (PLCs) and to the testing of synthesized systems on combined models, including a simulation model of the controlled unit and a virtual controller. Separate examina-tion is given to a case when the theoretically calculated compensator is impracticable

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6

Smith, J. J., und W. C. Greene. „Computer-Controlled Equipment Testing: Speed, Accuracy and Improved Analysis“. Naval Engineers Journal 110, Nr. 1 (Januar 1998): 207–15. http://dx.doi.org/10.1111/j.1559-3584.1998.tb02397.x.

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7

Swinth, K. L., und D. R. Sisk. „Computer-controlled testing and calibration of health physics instruments“. IEEE Transactions on Nuclear Science 35, Nr. 1 (Februar 1988): 567–70. http://dx.doi.org/10.1109/23.12787.

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8

Tietze, M. „Hot wire inspection by computer-controlled eddy current testing“. NDT & E International 24, Nr. 6 (Dezember 1991): 326. http://dx.doi.org/10.1016/0963-8695(91)90076-f.

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9

Rediniotis, Othon K. „A Computer-Controlled Pressure Standard“. Journal of Fluids Engineering 121, Nr. 1 (01.03.1999): 210–12. http://dx.doi.org/10.1115/1.2822006.

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The operating principles, as well as the technical aspects of the implementation of a new computer-controlled pressure standard are presented. The instrument can have dual use: either as a pressure source or as a pressure sensor. The device is intended mostly for use in problems where small differential pressures are of interest, i. e., 0–2.5 KPa and high accuracy is desired. Such a pressure range encompasses, for example, most of the pressure measurement applications in subsonic wind-tunnel testing. The device interfaces to a PC and is ideal for fully-automated pressure transducer calibration applications. The accuracy of the pressures produced or measured by the device is 0.08 percent F. S. (Full Scale).

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10

Thomas, Roger J., Geraldine A. Wright und Charles M. Fleetwood. „Computer controlled polishing and testing of a glancing incidence telescope“. Applied Optics 25, Nr. 16 (15.08.1986): 2835. http://dx.doi.org/10.1364/ao.25.002835.

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11

Borkowski, P., D. Boczkowski und T. Wysocki. „Computer-controlled system for testing contacts on switching high current“. Measurement 40, Nr. 3 (April 2007): 294–99. http://dx.doi.org/10.1016/j.measurement.2006.05.017.

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12

Stefanson, J. R. W., und William A. Ahroon. „Computer-controlled audiometer's application as an earplug fit-testing tool“. Journal of the Acoustical Society of America 140, Nr. 4 (Oktober 2016): 3274–75. http://dx.doi.org/10.1121/1.4970399.

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13

Mrozek, Ireneusz, und Vyacheslav Yarmolik. „Multiple Controlled Random Testing*“. Fundamenta Informaticae 144, Nr. 1 (04.03.2016): 23–43. http://dx.doi.org/10.3233/fi-2016-1322.

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14

GOPALARATNAM, VELLORE S., und GWO-SYANG YANG. „Flexible Automation for Servo-Controlled Testing“. Computer-Aided Civil and Infrastructure Engineering 5, Nr. 3 (September 1990): 229–43. http://dx.doi.org/10.1111/j.1467-8667.1990.tb00379.x.

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15

Nitinawarat, Sirin, George K. Atia und Venugopal V. Veeravalli. „Controlled Sensing for Multihypothesis Testing“. IEEE Transactions on Automatic Control 58, Nr. 10 (Oktober 2013): 2451–64. http://dx.doi.org/10.1109/tac.2013.2261188.

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16

Grishaber, R. B., R. H. Lu, D. M. Farkas und A. K. Mukherjee. „A novel computer controlled constant stress lever arm creep testing machine“. Review of Scientific Instruments 68, Nr. 7 (Juli 1997): 2812–17. http://dx.doi.org/10.1063/1.1148200.

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17

Talbot, T. L., W. H. Schuette, H. W. Tipton, L. E. Thibault, F. L. Brown und R. M. Winslow. „Noninvasive detection of the anaerobic threshold during computer-controlled exercise testing“. Medical and Biological Engineering and Computing 23, Nr. 6 (November 1985): 579–84. http://dx.doi.org/10.1007/bf02455313.

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18

Jywe, W. „Study using position silicon detectors for performance testing of computer numerically controlled machine tools“. Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 216, Nr. 5 (01.05.2002): 725–33. http://dx.doi.org/10.1243/0954405021520418.

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In this paper, various contouring test systems for computer numerically controlled (CNC) machine tools are reviewed. It is the first time a laser diode and a quadrant sensor have been employed to build a simple contouring measuring system for testing dynamic performance of a CNC machine tool. The experimental work on a CNC machine tool with a Fanuc OM controller for various contouring paths under specified feed rates is carried out. Then, the compensation work is executed with the assistance of this developed contouring system. After the compensation, the contouring error, especially at a high feed rate and small radius, is reduced significantly.

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19

CAI, KAI-YUAN, TSONG YUEH CHEN, YONG-CHAO LI, YUEN TAK YU und LEI ZHAO. „ON THE ONLINE PARAMETER ESTIMATION PROBLEM IN ADAPTIVE SOFTWARE TESTING“. International Journal of Software Engineering and Knowledge Engineering 18, Nr. 03 (Mai 2008): 357–81. http://dx.doi.org/10.1142/s0218194008003696.

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Software cybernetics is an emerging area that explores the interplay between software and control. The controlled Markov chain (CMC) approach to software testing supports the idea of software cybernetics by treating software testing as a control problem, where the software under test serves as a controlled object modeled by a controlled Markov chain and the software testing strategy serves as the corresponding controller. The software under test and the corresponding software testing strategy form a closed-loop feedback control system. The theory of controlled Markov chains is used to design and optimize the testing strategy in accordance with the testing/reliability goal given explicitly and a priori. Adaptive software testing adjusts and improves software testing strategy online by using the testing data collected in the course of software testing. In doing so, the online parameter estimations play a key role. In this paper, we study the effects of genetic algorithm and the gradient method for doing online parameter estimation in adaptive software testing. We find that genetic algorithm is effective and does not require prior knowledge of the software parameters of concern. Although genetic algorithm is computationally intensive, it leads the adaptive software testing strategy to an optimal software testing strategy that is determined by optimizing a given testing goal, such as minimizing the total cost incurred for removing a given number of defects. On the other hand, the gradient method is computationally favorable, but requires appropriate initial values of the software parameters of concern. It may lead, or fail to lead, the adaptive software testing strategy to an optimal software testing strategy, depending on whether the given initial parameter values are appropriate or not. In general, the genetic algorithm should be used instead of the gradient method in adaptive software testing. Simulation results show that adaptive software testing does work and outperforms random testing.

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20

Polianskis, Romanas, Thomas Graven-Nielsen und Lars Arendt-Nielsen. „Computer-controlled pneumatic pressure algometry-a new technique for quantitative sensory testing“. European Journal of Pain 5, Nr. 3 (Juni 2001): 267–77. http://dx.doi.org/10.1053/eujp.2001.0245.

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21

Viviani, P. „Testing the kinaesthetic and motor control systems with computer-controlled mechanical stimuli“. Electroencephalography and Clinical Neurophysiology 103, Nr. 1 (Juli 1997): 46. http://dx.doi.org/10.1016/s0013-4694(97)88111-8.

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22

Sakai, S., T. Asakawa und H. Okamura. „COMPUTER-CONTROLLED ELASTIC-PLASTIC FATIGUE CRACK GROWTH TESTING USING MULTI-TASK PROGRAMMING“. Experimental Techniques 22, Nr. 3 (Mai 1998): 26–31. http://dx.doi.org/10.1111/j.1747-1567.1998.tb01281.x.

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23

Sikoryn, T. A., R. M. Aspden und D. W. L. Hukins. „Simple computer controlled apparatus for in vitro mechanical testing of connective tissues“. Journal of Biomedical Engineering 10, Nr. 4 (Juli 1988): 357–59. http://dx.doi.org/10.1016/0141-5425(88)90069-6.

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24

Aspden, R. M., T. Larsson, R. Svensson und D. Heinegård. „Computer-controlled mechanical testing machine for small samples of biological viscoelastic materials“. Journal of Biomedical Engineering 13, Nr. 6 (November 1991): 521–25. http://dx.doi.org/10.1016/0141-5425(91)90102-d.

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25

Gaffan, E. A., und M. J. Eacott. „A computer-controlled maze environment for testing visual memory in the rat“. Journal of Neuroscience Methods 60, Nr. 1-2 (August 1995): 23–37. http://dx.doi.org/10.1016/0165-0270(94)00216-4.

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26

Sharma, Ravi Babu, und Jitendra Kumar Rai. „Design & Development of a Computer Controlled Tensile Strength Testing Machine for Testing of Strings & Fabrics“. International Journal of Advanced Engineering Research and Science 8, Nr. 8 (2021): 402–9. http://dx.doi.org/10.22161/ijaers.88.45.

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27

Steinmeyer, J. „A computer-controlled mechanical culture system for biological testing of articular cartilage explants“. Journal of Biomechanics 30, Nr. 8 (August 1997): 841–45. http://dx.doi.org/10.1016/s0021-9290(97)00040-7.

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28

Schichl, K., und K. Affeld. „A Computer Controlled Versatile Pulse Duplicator for Precision Testing of Artificial Heart Valves“. International Journal of Artificial Organs 16, Nr. 10 (Oktober 1993): 722–28. http://dx.doi.org/10.1177/039139889301601009.

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Numerous devices and mock circulations have been described for the measurement of pressure loss, closure time, closing and leakage volumes and energy loss in artificial heart valves. However, all the devices have been troubled with difficulties in generating and assessing the precise flow through the valve, and problems in defining the arterial load, i.e. the artificial aorta. The new test device follows a radically different approach: a computer controlled piston forces the fluid through the test valve only — with no afterload. During systole, outflow follows a physiological curve which is identical for all types of heart valves of a given size. During diastole a mathematically defined physiological pressure difference curve is followed. Consequently, the measurements are independent of the individual machine, the lab where testing takes place, the scientist who executes the test, the time when measurements are taken and all other external influences.

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29

Žliobaitė, Indrė. „Controlled permutations for testing adaptive learning models“. Knowledge and Information Systems 39, Nr. 3 (26.03.2013): 565–78. http://dx.doi.org/10.1007/s10115-013-0629-7.

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30

Guo, Gao Feng, Ang Ran Dong, En Li und Chong Gao. „Material Testing Based on Cylindrical Cavity“. Key Engineering Materials 723 (Dezember 2016): 166–70. http://dx.doi.org/10.4028/www.scientific.net/kem.723.166.

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This design of alcohol detection system uses DSP technology, ADF4350 frequency synthesizer chip developed microwave source controlled by DSP controller, the source excites the microwave resonator cavity, the output signal of the resonator is detected by the detector, then sampled and processed by the DSP processor, and the concentration of alcohol is calculated by perturbation theory and dielectric properties of alcohol. The human-computer interaction of this system is realized by touch screen, so that the display looks easy to operate and very user-friendly. This paper analyzes the feasibility of microwave resonant cavity perturbation method in alcohol materials, and derives the relationship between the concentration of alcohol mixed solution, the dielectric constant and the output frequency of the resonant cavity, and the theoretical basis of this paper is derived. The dielectric properties of different alcohol concentration at different frequencies were studied, and the standard curves of different concentration alcohol dielectric spectra were established by the theoretical model and a large number of experimental data.

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31

Yang, Xiao Qiang, Ya Ming Gao, Ying Liu und Jun Han. „Study on Universal Testing Platform of Engineering Machinery“. Applied Mechanics and Materials 33 (Oktober 2010): 544–48. http://dx.doi.org/10.4028/www.scientific.net/amm.33.544.

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Due to the multiple types and complexity of fault diagnosis, the general-purpose testing platform of engineering machinery’s hydraulic system is developed for the maintenance of military equipment. The general function and structure of the testing platform is presented. The hardware system consists of modular circuit, integrates control computer of embedded controller with PXI-interfaced modular instrument, program-controlled device, connector and adapter hardware. And the software program comprises data management module, fault diagnosis module coupled to the data acquisition module, signal processing module, experiment condition control module, database access module, system configuration and self-test as well as help module. Further, the hardware characteristics are showed and the principle of hydraulic testing platform is presented. The universal testing platform offers enormous benefits for fault diagnosis and condition monitoring of military equipment and machinery.

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32

Bedi, S., W. Chernoff und G. W. Vickers. „Computer-aided Fairing and Direct Numerically Controlled Machining of Ship Hull Hydrodynamic Testing Models“. Transactions of the Canadian Society for Mechanical Engineering 12, Nr. 1 (März 1988): 43–48. http://dx.doi.org/10.1139/tcsme-1988-0007.

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A computer-aided method of defining and machining 2-metre ship hull forms for hydrodynamic testing is described. The hull shape is faired from the original table of off-sets using a minimum number of smooth three-dimensional parametric skeletal-lines along the length of the boat. A fine set of smoothly blending station-lines is therby formed. The hull shape is preformed in two halves through a lamination process and machined on a three-axis numerically controlled machining (CNC) centre. A carbide-tipped, end-milling cutter is directed along the closely spaced station-lines to rapidly form an accurate hull shape requiring a minimum of hand work. The fairing and machining programs, called G-surf, run on a personal computer and are used to transmit the data and control the CNC machine in real time. The resulting hull shape is symmetrical and far more accurate than manually lofted and preshaped models.

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Aydilek, AH, und ME Kutay. „Development of an Innovative Computer-Controlled Water Deairing System for Hydraulic Testing of Geosynthetics“. Journal of Testing and Evaluation 32, Nr. 2 (2004): 11852. http://dx.doi.org/10.1520/jte11852.

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34

Marshall, W. G., R. Leek, M. J. Pilkington und N. A. Hampson. „A computer-controlled discharge unit for the testing of nickel—cadmium cells and batteries“. Journal of Power Sources 16, Nr. 2 (Oktober 1985): 119–30. http://dx.doi.org/10.1016/0378-7753(85)80085-9.

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35

Assink, Egbert, und Jan Van Der Linden. „Computer Controlled Spelling Instruction: A Case Study in Courseware Design“. Journal of Educational Computing Research 9, Nr. 1 (Februar 1993): 17–28. http://dx.doi.org/10.2190/ct2y-q5c9-02h5-vw7q.

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The research project “Feedback Processes in Computer Managed Spelling Instruction” was aimed at developing and testing an instructional software program for teaching the orthography of Dutch verbs. The main focus of this article is on how to design an optimal learning environment. The design of human-computer interaction is highlighted from a number of respects: the sequencing of the learning content, the presentation of information on the screen, and the format of student input and feedback. The program consists of seven instructional modules. In each module, a specific grammatical operation, such as grammatical tense, person, number or voice, is highlighted. The effectiveness of the courseware was tested in a field experiment. Two versions of the program, a Standard Version and a Flexible Version, were compared, taking account of individual differences in spelling ability and motivation variables. Results with both versions are reported.

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36

Kozyrev, N. A., R. A. Shevchenko, A. A. Usol’tsev, A. N. Prudnikov und L. P. Bashchenko. „Welding of differentially heat-strengthened rails. Industrial testing“. Izvestiya. Ferrous Metallurgy 63, Nr. 5 (01.07.2020): 305–12. http://dx.doi.org/10.17073/0368-0797-2020-5-305-312.

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The article describes the study of welding processes with the subsequent control of cooling of full-profile rail joints, produced by passing alternating electric current pulses after welding. The influence of welding modes on the quality of welded joint was investigated. Welding was carried out on a resistance butt welding machine MCP-6301 in conditions of the rail welding company LLC “RSP-M” (RSP-29). For research, the samples of P65 type full-profile rails of DT350 category 600 mm long were cut out. The isothermal holding conditions after welding were controlled using a personal computer with a change in the program of the SIMATIC S7-300 industrial controller and the software SIMATIC STEP 7, which allows modes of controlled cooling to be set. The control program was written in the LAD graphic language. To search for optimal modes of controlled cooling, a complete factor experiment N = 2k was carried out. Non-heat-treated joints were tested for three-point static bending according to the state standard STO RZD 1.08.002 – 2009 “Railway rails, welded by electric contact method”. Static bending tests were carried out on the press of PMS-320 type. Values of the force arising during bending Pbend and the bend deflection fpr at which the control sample is destroyed, were determined, as well as maximum values of these indicators if the sample was not destroyed during the tests. During the experiments, regression models were obtained for output parameters of the bending force and bend deflection. Macrostructure of the samples and distribution of the metal hardness on rolling surface of the rails welded joint were studied. A new method of resistance butt welding was developed, which makes it possible to obtain a welded connection of P65 type rails of DT350 category with properties that exceed the technical requirements of the mentioned state standard.

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37

Zaucha, Michael T., Julia Raykin, William Wan, Robert Gauvin, Francois A. Auger, Lucie Germain, Thomas E. Michaels und Rudolph L. Gleason. „A Novel Cylindrical Biaxial Computer-Controlled Bioreactor and Biomechanical Testing Device for Vascular Tissue Engineering“. Tissue Engineering Part A 15, Nr. 11 (November 2009): 3331–40. http://dx.doi.org/10.1089/ten.tea.2008.0369.

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38

Tarczyński, W., T. Hejman und D. Smugała. „Computer-controlled testing system for investigating the dynamic characteristics of contactors with A.C. electromagnet drives“. Measurement 33, Nr. 4 (Juni 2003): 313–23. http://dx.doi.org/10.1016/s0263-2241(03)00002-2.

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39

Hua, Zi Kai, und Yong Wei Fan. „A New Ortho-POD Biotribometer for Orthopaedic Biomaterials Wear Testing“. Applied Mechanics and Materials 461 (November 2013): 367–72. http://dx.doi.org/10.4028/www.scientific.net/amm.461.367.

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Wear has been the primary failure mode affecting the long-term performance of orthopaedic implants. The tribological evaluation of orthopaedic biomaterials in vitro is regarded as an essential material characterization before implantation. In this paper, a new biotribometer of pin-on-disk type, the Ortho-POD, was designed and built for the biotribological tests of orthopaedic biomaterials. The primary goal of developing this Ortho-POD is to simulate and predict the wear properties of orthopaedic biomaterials in clinical application, especially in the form of hip, knee and spine prostheses. This 6-station Ortho-POD, including a pin guiding module, a motion module, a framework module and a loading module, provides multidirectional slide track shapes and variable load via a computer-controlled programmer. A frequency controller and heating system were assembled in the Ortho-POD so as to offer a wide range of testing conditions. Keywords-biotribology; wear; orthopaedic biomaterial; pin on disk; wear testing

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40

Więckowski, Andrzej. „Prototypowy manipulator ja-wa do automatycznego betonowania ścian“. Przegląd Naukowy Inżynieria i Kształtowanie Środowiska 26, Nr. 2 (02.06.2017): 276–84. http://dx.doi.org/10.22630/pniks.2017.26.2.27.

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In the context of automatic construction of buildings analyzed prototype, ja-wa system, which integrates aspects of computer controlling the manipulator of the testing of allowable construction progress (according to the results of the analysis rise the endurance of the young concrete, laid in layers made earlier). Imposing of concrete mix (controlled intervals) with finish a surface septum is performed by a computer-controlled manipulator-machine, which moves the track system ferry. Indicated rationality and low capital intensity of solutions.

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41

Porumb, Vlad, Alexandru Florentin Trandabăț, Cristina Terinte, Irina Draga Căruntu, Elena Porumb-Andrese, Mihail Gabriel Dimofte und Dragoş Pieptu. „Design and Testing of an Experimental Steam-Induced Burn Model in Rats“. BioMed Research International 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/9878109.

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Background. Most of the current models for experimental burns pose difficulties in ensuring consistency and standardization.Aim of Study. We aimed to develop an automated, reproducible technique for experimental burns using steam-based heat transfer.Methods. The system developed for steam exposure was based on a novel, integrated, computer-controlled design. Three groups of rats were exposed to steam for 1, 3, and 7 seconds. The lesions were evaluated after 20 minutes, 48 hours, and 72 hours after burn induction.Results. One-second steam application produced a superficial second-degree burn; three-second application induced deep second-degree burn; and seven-second application led to a third-degree burn.Conclusion. The high level of automation of our integrated, computer-controlled system makes the difference between our system and other models, by ensuring the control of the duration of exposure, temperature, and pressure and eliminating as many potential human generated errors as possible. The automated system can accurately reproduce specific types of burns, according to histological assessment. This model could generate the reproducible data needed in the study of burn pathology and in order to assess new treatments.

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Chaulagain, Raj Kumar, Gaurav Dahal, Alkesh Nepal, Amrit Tiwari und Pramod Regmi. „Performance Testing of Foldable Electric Powered Wheelch“. Journal of Innovations in Engineering Education 3, Nr. 1 (31.03.2020): 115–22. http://dx.doi.org/10.3126/jiee.v3i1.34332.

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This paper aims to design and test a foldable, lightweight wheelchair propelled by a pair of electric motors. Starting from literature review, the research team carried out the design and solid modeling of proposed wheelchair. Solidworks software was used to make the computer model. The wheelchair frame comprised of a chair like frame with two pairs of wheels on front and back. The defined electric wheelchair is completed with the coordination of manual and electric system. A pair of electric motor is fitted on wheels at backside which are controlled by the electronic controller powered by the battery. The folding mechanism developed on the wheelchair was aimed for ease of transport and storage. The frame material was selected to be aluminum alloy. Lithium ion battery and geared electric motors were used in the prototype and motion control was done by joystick. Locking mechanism was used for frame locking during operation. The prototype was subjected to different tests. The unfolded dimensions of wheelchair were 850mm × 620mm × 1400mm (0.738m3) and whereas the folded dimensions were 1100mm × 620mm × 520mm (0.354m3) that resulted 52.03% reduction in volume. The mass of wheelchair was measured to be 22kg. The tested data of wheelchair was found to be 10 km approximately.

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Senatorski, Jan, Paweł Mączyński und Jan Tacikowski. „A comparison of some properties of the computer controlled nitriding process versus carburizing“. Inżynieria Powierzchni 26, Nr. 1 (08.06.2021): 23–33. http://dx.doi.org/10.5604/01.3001.0014.8775.

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A comparison is presented of the nitriding and carburizing processes. Traditional gas nitriding, despite its several advantages over carburizing, has still not achieved its due popularity. The key factor is inadequate process control. An industrial-scale computerized system, employing the nitriding potential as the fundamental controlling parameter, can produce repeatable, superior nitriding results, limiting layer brittleness and enhancing usable properties. Results obtained showed that nitriding layers match carburized layers in fatigue, while exceeding them in both impact strength and wear resistance. The superiority of the computer-controlled process over traditional nitriding is illustrated by results of wear testing. The advent of controlled nitriding makes this process a viable alternative to carburizing.

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Lakey, Jonathan R. T., Garth L. Warnock, Mark Brierton, Ziliang Ao, Bernhard J. Hering, Nick J. M. London, Camillo Ricordi, Frank Corbin und Ray V. Rajotte. „Development of an Automated Computer-Controlled Islet Isolation System“. Cell Transplantation 6, Nr. 1 (Januar 1997): 47–57. http://dx.doi.org/10.1177/096368979700600109.

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Before clinical islet transplantation can become an effective and reliable treatment for type 1 diabetic patients, there must be significant improvements in the methods employed for the isolation of islets of Langerhans. We have developed an automated cell extraction system (ACES), which allows computer control of the isolation process. As well, it incorporates a novel method of recombining dissociated pancreatic tissue. Following initial system design and testing to determine the optimal system configuration, a series of 12 consecutive canine islet isolations were performed. Pancreases were perfused with collagenase via the duct and dissociated and recombined using either the standard Ricordi-based protocol (group 1, n = 6) or dissociated and recombined using the ACES system (group 2, n = 6). A total of 90.8 ± 21 x 103 islet equivalents (IE) (mean ± SEM) were recovered in group 1 vs. 99 ± 14 x 103 IE in group 2 (p = NS, student unpaired t-test). Following Ficoll purification the recovery was 56.2 ± 14 x 103 IE for group 1 vs. 54.7 ± 11 x 103 IE for group 2 (p = NS). Viability was equivalent with an 8.6-fold increase in insulin secretion for group 1 and an 8.8-fold increase for group 2 when the islets were exposed to high glucose solution supplemented with IBMX (3-isobutyl-1-methylxanthine) during static incubation. In vivo function was equivalent following transplantation of 2000 IE under the kidney capsule of alloxan-induced diabetic nude mice with five of six and five of seven mice surviving long-term (>50 days posttransplant) (groups 1 and 2, respectively). This data shows that an entirely automated pancreatic islet extraction system can result in effective canine islet recovery without compromising islet yields and viability. The ACES system has several ad van tages over the standard isolation protocol. These include: 1) computer control and monitoring over all phases of the isolation, 2) a single-use sterile disposable tubing set, and 3) a novel method of tissue recombination. Copyright © 1997 Elsevier Science Inc.

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HU, HAI, CHANG-HAI JIANG und KAI-YUAN CAI. „AN IMPROVED APPROACH TO ADAPTIVE TESTING“. International Journal of Software Engineering and Knowledge Engineering 19, Nr. 05 (August 2009): 679–705. http://dx.doi.org/10.1142/s0218194009004349.

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Adaptive testing is the counterpart of adaptive control in software testing. It means that software testing strategy should be adjusted on-line by using the testing data collected during software testing as our understanding of the software under test is improved. Previous studies on adaptive testing involved a simplified Controlled Markov Chain (CMC) model for software testing which employs several unrealistic assumptions. In this paper we propose a new adaptive software testing approach in the context of an improved and namely, general CMC model which aims to eliminate such threats to validity. A set of more realistic basic assumptions on the software testing process is proposed and several unrealistic assumptions are replaced by less unrealistic assumptions. A new adaptive testing strategy based on the general CMC is developed and implemented. Mathematical simulations and experiments on real life software are conducted to demonstrate the effectiveness of the new strategy.

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Mutch, W. Alan C., Daniel M. Mandell, Joseph A. Fisher, David J. Mikulis, Adrian P. Crawley, Olivia Pucci und James Duffin. „Approaches to Brain Stress Testing: BOLD Magnetic Resonance Imaging with Computer-Controlled Delivery of Carbon Dioxide“. PLoS ONE 7, Nr. 11 (05.11.2012): e47443. http://dx.doi.org/10.1371/journal.pone.0047443.

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Henry, James A., Stephen A. Fausti, Christopher L. Flick, Wendy J. Helt und Roger M. Ellingson. „Computer-Automated Clinical Technique for Tinnitus Quantification“. American Journal of Audiology 9, Nr. 1 (Juni 2000): 36–49. http://dx.doi.org/10.1044/1059-0889(2000/002).

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This study addresses the need for uniformity in techniques for clinical quantification of tinnitus. Because automation can be an effective means to achieve standardization, this laboratory is developing techniques to perform computer-automated tinnitus testing. The present study was conducted to demonstrate the feasibility of obtaining reliable tinnitus measures using a fully automated system. A computer-controlled psychoacoustical system was developed to quantify tinnitus loudness and pitch using a tone-matching technique. Hearing thresholds were also obtained as part of the procedure. The system generated test stimuli and simultaneously controlled a notebook computer positioned in the sound chamber facing the patient. The notebook computer displayed instructions for responding and relayed response choices through on-screen "buttons" that the patient touched with a pen device. Twenty individuals with tinnitus were evaluated with the technique over two sessions, and responses were analyzed for test-retest reliability. Analyses revealed good reliability of thresholds, loudness matches, and pitch matches. These results demonstrate that use of a fully automated system to obtain reliable measurements of tinnitus loudness and pitch is feasible for clinical application.

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Lambert, G. A. „Software-controlled testing for antidromic activation of single neurones“. Bioinformatics 10, Nr. 3 (1994): 237–41. http://dx.doi.org/10.1093/bioinformatics/10.3.237.

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Nicholson, P. G., R. B. Seed und H. A. Anwar. „Elimination of membrane compliance in undrained triaxial testing.II. Mitigation by injection compensation“. Canadian Geotechnical Journal 30, Nr. 5 (01.10.1993): 739–46. http://dx.doi.org/10.1139/t93-066.

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A computer-controlled injection-correction system has been developed to continuously and completely mitigate the adverse effects of membrane compliance for undrained testing of granular soils. The system was developed with the explicit idea that it could be quickly and easily adapted to most any up to date triaxial testing apparatus. A relationship between effective confining stress and volumetric compliance can be predetermined, as volumetric-compliance errors have been shown to be a direct and repeatable function of effective confining stresses for a given material. The predetermination of volumetric-compliance errors represents a suitable basis for control of injection–removal compensation for membrane compliance during undrained testing. A closed-loop computer-controlled system continuously monitors changes in sample effective confining stresses such that precalculated volumetric-compliance errors can be continuously offset by injecting or removing volumes of water equal to those errors throughout the duration of each test. The validity of the injection system was verified by comparison of the compensated tests to results of large-scale (300 mm diameter) tests of the same materials, as compliance effects for large-scale tests of this material were negligible. Key words : membrane, penetration, compliance, undrained testing, triaxial, compensation, liquefaction.

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Tu, Y. K., A. Blance, V. Clerehugh und M. S. Gilthorpe. „Statistical Power for Analyses of Changes in Randomized Controlled Trials“. Journal of Dental Research 84, Nr. 3 (März 2005): 283–87. http://dx.doi.org/10.1177/154405910508400315.

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Randomized controlled trials (RCTs) are widely recommended as the most useful study design to generate reliable evidence and guidance to daily practices in medicine and dentistry. However, it is not well-known in dental research that different statistical methods of data analysis can yield substantial differences in study power. In this study, computer simulations are used to explore how using different univariate and multivariate statistical methods of analyzing change in continuous outcome variables affects study power, and the sample size required for RCTs. Results show that, in general, analysis of covariance (ANCOVA) yields greater power than other statistical methods in testing the superiority of one treatment over another, or in testing the equivalence between two treatments. Therefore, ANCOVA should be used in preference to change score or percentage change score to reduce type II error rates.

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