Journal articles: 'Laboratory test bench'

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Pluzhnik, Evgeniy, Evgeny Nikulchev, and Simon Payain. "Laboratory Test Bench for Research Network and Cloud Computing." International Journal of Communications, Network and System Sciences 07, no. 07 (2014): 243–47. http://dx.doi.org/10.4236/ijcns.2014.77026.

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Sivencrona, Håkan, Anders Sandberg, and Martin Hiller. "SWAP - Design of an AUTOSAR Open Laboratory Test Bench." SAE International Journal of Passenger Cars - Electronic and Electrical Systems 1, no. 1 (April 14, 2008): 187–93. http://dx.doi.org/10.4271/2008-01-0479.

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Chen, Xi Qu, and Qiang Lv. "Low-Cost and Modularized Test Bench for Focal Plane Array." Advanced Materials Research 981 (July 2014): 46–49. http://dx.doi.org/10.4028/www.scientific.net/amr.981.46.

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In this paper, a low-cost and modularized test bench for microbolometric focal plane array is proposed. Based on the analysis of driving microbolometric focal plane array, we have set up the simple test bench. The test bench consists of four major modules: optical part, driving sequence timer, power supply and signal processing board, and data analyzer. Each module in the test bench is reconfigurable and the driving sequence timer is programmable in system. The proposed test bench is low-cost and has been applied to practical microbolometric focal plane arrays in our laboratory.

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Akzigitov, R. A., N. S. Pisarev, N. I. Statsenko, A. R. Glukharev, and I. B. Tsar’kov. "DEVELOPING THE LABORATORY TEST BENCH OF FUEL THREE-POINT MEASUREMENT." Siberian Journal of Science and Technology 20, no. 2 (2019): 198–203. http://dx.doi.org/10.31772/2587-6066-2019-20-2-198-203.

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Pelz, Rico, Felix Hutzler, Axel Schik, and Gunther Müller. "Characterization of E-fluids from Laboratory Analysis to Test Bench." MTZ worldwide 82, no. 10 (September 10, 2021): 42–47. http://dx.doi.org/10.1007/s38313-021-0690-7.

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Siaudinyte, Lauryna. "Modelling of linear test bench for short distance measurements." ACTA IMEKO 4, no. 2 (June 29, 2015): 68. http://dx.doi.org/10.21014/acta_imeko.v4i2.229.

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To perform the calibration of total stations under laboratory conditions, lack of space is a common issue. The paper presents the analysis of applied solutions for short distance measurements and assumptions of the construction development of a linear test bench for cyclic error determination. Various aspects of improvement are explained in the paper and the preliminary design of a linear test bench being developed at Vilnius Gediminas Technical University is presented.

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Song, En Zhe, Mei Liang Yin, Chang Xi Ji, Jun Sun, and Cheng Shun Yin. "Hydraulic Test Bench Design on Travel Drive System of Platform Lorry." Advanced Materials Research 619 (December 2012): 512–17. http://dx.doi.org/10.4028/www.scientific.net/amr.619.512.

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In order to study the platform lorry’s travel and drive system, based on the prototype of real platform lorry，the system was properly simplified in engineering application under the circumstance of fully satisfication for control strategy. A method of test-bench contruction based on three variables of engine, pump and motor was provided, furthermore, detailed analysis and calculation for the selection and matching of system major parts was carried out, and the test-bench of the platform lorry’s travel and drive system was established. The test-bench mentioned above could also be used for the hydraulic system laboratory research of platform lorry or other similar models.

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Wang, Sha, Jixian Dong, Changke Tan, Bo Wang, Lijie Qiao, and Huan Liu. "Design a Laboratory Rotating Test Bench for the Multi-Channel Dryer Experiment." Journal of Korea Technical Association of the Pulp and Paper Industry 51, no. 5 (October 31, 2019): 27–37. http://dx.doi.org/10.7584/jktappi.2019.10.51.5.27.

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Capasso, C., D. Iannuzzi, L. Ferraro, and O. Veneri. "Experimental Study on a Laboratory Test Bench for Sea Wave Generation Systems." Energy Procedia 61 (2014): 1107–10. http://dx.doi.org/10.1016/j.egypro.2014.11.1033.

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Pleban, Dariusz, Grzegorz Szczepański, Jan Radosz, and Łukasz Kapica. "The test bench for the assessment of the impact of wind turbine noise on human performance." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 4 (August 1, 2021): 2629–33. http://dx.doi.org/10.3397/in-2021-2188.

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Among the factors related to the operation of wind farms, wind turbine noise has to be seen as a source of annoyance for both people living and working near wind farms. A method and a test bench to conduct noise annoyance tests of different types of wind turbine noise in laboratory conditions have been developed. The test bench is based on a multi-channel sound reproducing system using the DANTE network (in which digital acoustic signals are broadcast over Ethernet) and is compiled in the acoustic test chamber. The test bench consists of 19 speakers, including 17 Avantone MixCube studio monitors and 2 LS600 woofers. During the tests a study subject is assessed in terms of efficiency and performance using a computer-based ALS test from the Vienna Test System. The paper describes the test method, the test bench and the results of the pilot studies carried out to assess the impact of wind turbine noise on human performance.

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Tkaczyk, Sławomir, Mikołaj Drozd, Łukasz Kędzierski, and Krzysztof Santarek. "Study of the Stability of Palletized Cargo by Dynamic Test Method Performed on Laboratory Test Bench." Sensors 21, no. 15 (July 29, 2021): 5129. http://dx.doi.org/10.3390/s21155129.

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The paper presents a method and results of experimental testing of the stability of palletized cargo wrapped in stretch film in laboratory conditions and methods and parameterization of its application for proper cargo securing. Reduction of stretch film consumption is also significant for sustainable transport. It will contribute to the minimization of costs on a micro-scale (manufacturers and shippers) and a macro scale—a significant reduction in pollution of the environment and gas emissions by reducing stretch film production. The experiments have been performed following the requirements of EUMOS 40509 and 40511 standards. The proposed method of testing the stability of palletized cargo is based on tests performed on a laboratory test bench using FEF-200 sensors. The results of conducted experiments demonstrated that the selection of a proper stretch film and a cargo wrapping model could significantly reduce the risk of cargo damage through increasing cargo stabilizing forces and, at the same time, reducing stretch film consumption. The developed method can significantly reduce the cost of securing and concurrently assure required cargo security. This directly impacts the safety of all participants in the transport process in supply chains.

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Gadalov, V. N., V. M. Brodsky, E. A. Filatov, and A. V. Filonovic. "Results of the experimental bits bench test, equipped with the compound built-up layers." Glavnyj mekhanik (Chief Mechanic), no. 8 (August 1, 2020): 52–56. http://dx.doi.org/10.33920/pro-2-2008-05.

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The article shows the results of performance laboratory studies of compound built-up layers, as well as benches of the pilot tests of the drilling bit rolling cutters, equipped on the bit gage surface of the compound built-up layer; the hardening layers were located along the gage teeth contour. The cast tungsten carbide building-up welding on experimental bits was carried out using a gas-flame method. The induction method of building-up welding was implemented on the rolling cutters of the serial bits. The article shows the results of comparative indicators of serial and experimental bits when their processing on the bench. It was found that experimental bits were more efficient than the serial ones. The estimation of the performance laboratory tests results was confirmed by tests on the bench under pilot conditions of the rolling cutter bits drilling, equipped on the bit gage surface by the compound built-up layer.

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Miligy, Dawlat A. "Laboratory errors and patient safety." International Journal of Health Care Quality Assurance 28, no. 1 (February 9, 2015): 2–10. http://dx.doi.org/10.1108/ijhcqa-10-2008-0098.

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Purpose – Laboratory data are extensively used in medical practice; consequently, laboratory errors have a tremendous impact on patient safety. Therefore, programs designed to identify and reduce laboratory errors, as well as, setting specific strategies are required to minimize these errors and improve patient safety. The purpose of this paper is to identify part of the commonly encountered laboratory errors throughout our practice in laboratory work, their hazards on patient health care and some measures and recommendations to minimize or to eliminate these errors. Design/methodology/approach – Recording the encountered laboratory errors during May 2008 and their statistical evaluation (using simple percent distribution) have been done in the department of laboratory of one of the private hospitals in Egypt. Errors have been classified according to the laboratory phases and according to their implication on patient health. Findings – Data obtained out of 1,600 testing procedure revealed that the total number of encountered errors is 14 tests (0.87 percent of total testing procedures). Most of the encountered errors lay in the pre- and post-analytic phases of testing cycle (representing 35.7 and 50 percent, respectively, of total errors). While the number of test errors encountered in the analytic phase represented only 14.3 percent of total errors. About 85.7 percent of total errors were of non-significant implication on patients health being detected before test reports have been submitted to the patients. On the other hand, the number of test errors that have been already submitted to patients and reach the physician represented 14.3 percent of total errors. Only 7.1 percent of the errors could have an impact on patient diagnosis. Practical implications – The findings of this study were concomitant with those published from the USA and other countries. This proves that laboratory problems are universal and need general standardization and bench marking measures. Originality/value – Original being the first data published from Arabic countries that evaluated the encountered laboratory errors and launch the great need for universal standardization and bench marking measures to control the laboratory work.

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Tung, Simon C., Yong Huang, and Dennis C. Karczynski. "Tribological Investigation of the Polymer-Based Lubrication System Using a Laboratory Reciprocating Bench Test." Tribology Transactions 50, no. 4 (October 23, 2007): 458–65. http://dx.doi.org/10.1080/10402000701613203.

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Malatesta, M. J., G. C. Barber, J. M. Larson, and S. L. Narasimhan. "Development of a Laboratory Bench Test to Simulate Seat Wear of Engine Poppet Valves." Tribology Transactions 36, no. 4 (January 1993): 627–32. http://dx.doi.org/10.1080/10402009308983204.

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Zhou, Yong, and Xiaogang Zhou. "Modeling and controller design for an experimental test bench for aircraft actuators." Advances in Mechanical Engineering 10, no. 12 (December 2018): 168781401881536. http://dx.doi.org/10.1177/1687814018815362.

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The reliable and repeatable experimental ground testing of aircraft actuator is an essential phase before flight testing. It is not an easy task to simulate the alternating aerodynamic forces on actuators reasonably and accurately in a laboratory. In this article, an experimental test bench is designed to simulate the aerodynamic forces by a hydraulic actuator, which replicates the operating conditions that the actuator will encounter in service. In order to improve the force control performance, a feed-forward compensator and a fuzzy proportional–integral–derivative controller are designed. Both simulation and experimental results show that the designed method can improve the control performance.

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Gautrelet, Christophe, Leila Khalij, Aymeric Appert, and Roger Serra. "Linearity investigation from a vibratory fatigue bench." Mechanics & Industry 20, no. 1 (2019): 101. http://dx.doi.org/10.1051/meca/2018044.

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High-cycle fatigue behaviour of structures can be obtained through vibratory tests using frequency response functions or transmissibilities. To this end, this study deals with the qualification of the vibratory fatigue bench developed at the Laboratory of Mechanic of Normandy. This bench uses an electrodynamic shaker which can reach excitation frequencies that are higher than conventional fatigue machines. To carry out relevant tests, the capacities of the test bench must be well known. Correlations between excitation and response were investigated to determine the allowable setpoints to maintain linearity between the input and output signals to validate our system. The difficulties related to the experiments were presented and discussed.

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Gu, X., F. Z. Altinbas, E. Beebe, W. Fischer, B. M. Frak, D. M. Gassner, K. Hamdi, et al. "The electron lens test bench for the relativistic heavy ion collider at Brookhaven National Laboratory." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 743 (April 2014): 56–67. http://dx.doi.org/10.1016/j.nima.2013.11.102.

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S. Gan-Mor, B. Ronen, Y. Vaaknin, Y. Glik, Y. Samocha, and D. Eisikowitch. "Further Studies on Electrostatic Date Pollination from the Laboratory Bench to Field Unit Performance Test." Applied Engineering in Agriculture 25, no. 5 (2009): 643–46. http://dx.doi.org/10.13031/2013.28848.

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Kim, Kyung Hwan, Sun Hwa Kim, Young Rim Jung, and Man Goo Kim. "Evaluation of malodor for automobile air conditioner evaporator by using laboratory-scale test cooling bench." Journal of Chromatography A 1204, no. 1 (September 2008): 72–80. http://dx.doi.org/10.1016/j.chroma.2008.07.030.

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Zhong, Bao Hua. "The Brake Guards against Holds the Dead (ABS) Teaching Laboratory Bench the Development." Advanced Materials Research 779-780 (September 2013): 1102–5. http://dx.doi.org/10.4028/www.scientific.net/amr.779-780.1102.

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This article studied one kind of automobile brake to guard against holds the dead examination test platform structure, the control design plan, and guarded against to the brake holds the dead system structure principle teaching to carry on the thorough discussion.This system wheel uses the hydraulic pressure actuation, through the adjustment hydraulic pressure parameter may in the simulation different vehicle speed, the different coefficient of adhesion road surface the automobile apply the brake well when ABS system working condition; Through the animation broadcast system, the brake hydraulic pressure test system and designs and so on vehicle speed examination system, can real, the comprehensive development ABS system work process; The breakdown establishment and the elimination system use in to the brake guard against hold the dead system to carry on the breakdown diagnosis and the elimination simulation training.This laboratory bench main innovation spot is the wheel uses the hydraulic pressure actuation; Uses the brake pressure parameter control animation broadcast; Uses the computer to carry on the breakdown establishment.

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Burn, J., C. Reynard-Carette, M. Carette, A. Lyoussi, A. Volte, M. Tarchalski, and R. Prokopowicz. "Calibration of a Single-Cell Calorimeter in a New Transient-state Test Bench." EPJ Web of Conferences 225 (2020): 04009. http://dx.doi.org/10.1051/epjconf/202022504009.

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The nuclear radiation energy deposition rate is a key value for the thermal design of experiments, on materials and nuclear fuels, carried out in experimental channels of nuclear research reactors. Studies are led for two kinds of sensor currently dedicated to quantifying this value and corresponding to calorimeter. Development of new sensors but also improvement of their calibration and their associated interpretation methods are necessary. These aims are possible by many ways such as numerical simulations of sensor, characterizations under laboratory conditions and experimental campaign under irradiation conditions. The calibration step under non-irradiation conditions represents a crucial phase. This phase requires the development of specific benches. The present paper focuses on a new thermal-transient bench and its use to perform calibration of a polish single-cell calorimeter. The new bench is detailed. First studies of the influence of external conditions (temperature, velocity) on the calorimeter sensitivity are presented and discussed.

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Zamyshlyaev, A. A., A. N. Shmygin, and D. E. Donovskiy. "Research aimed at expanding the range of permissible application modes of aircraft equipment." Journal of «Almaz – Antey» Air and Space Defence Corporation, no. 3 (September 30, 2016): 24–29. http://dx.doi.org/10.38013/2542-0542-2016-3-24-29.

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The article shows a cycle of design-theoretical and laboratory work, which provided opportunities to significantly expand the application mode of aviation equipment without additional flight tests. The work was carried out in four stages: determination of impact air pressure and static pressure receiving coefficients, development of computer programs, laboratory bench-test at the air pressure receiving system (APRS) and APRS parameters computational determination in the whole range of application modes.

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Li, Rui, Wenjun Mu, Tianyu Sun, Xi Li, and Xiaojie Wang. "Benchmark study of a small-scale slab track system with squeeze-mode magnetorheological fluid isolators." Journal of Intelligent Material Systems and Structures 29, no. 1 (May 8, 2017): 52–61. http://dx.doi.org/10.1177/1045389x17705219.

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A magnetorheological fluid squeeze-mode isolator is proposed to improve the vibration isolation performance of a subway floating slab track system. However, it is difficult to carry out the test for the full-scale track vibration isolation system in the laboratory. The research is based on scale analysis of the floating slab track system, from the point view of the dimensionless of the dynamic characteristics of physical quantity, to establish a small-scale test bench system for the magnetorheological fluid isolators. A small-scale magnetorheological fluid device with squeeze mode is designed, and its performance is tested. The experimental results showed that the squeeze-mode magnetorheological fluid Isolators can provide a large range of damping force for energy dissipation with a small amount of input electric power. The major parameters of a small-scale test bench are obtained according to the similarity theory. The force transmissibility ratio and the relative acceleration transmissibility ratio are selected as evaluation index of system similarity. Furthermore, a test bench is built according to the small-scale model parameter analysis. The experimental studies showed that the bench testing results were consistency with that of theoretical model in evaluating the vibration force and acceleration. Therefore, the small-scale study of magnetorheological track vibration isolation system based on similarity theory reveals the isolation performance of a real slab track prototype system.

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Naughton, Phoebe E., Nicole Sheers, David J. Berlowitz, Mark E. Howard, Douglas A. McKim, and Sherri L. Katz. "Objective measurement of lung volume recruitment therapy: laboratory and clinical validation." BMJ Open Respiratory Research 8, no. 1 (July 2021): e000918. http://dx.doi.org/10.1136/bmjresp-2021-000918.

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Lung volume recruitment manoeuvres are often prescribed to maintain respiratory health in neuromuscular disease. Unfortunately, no current system accurately records delivered dose. This study determined the performance characteristics of a novel, objective, manual lung volume recruitment bag counter (‘the counter’) with bench and healthy volunteer testing, as well as in individuals with neuromuscular disease. We undertook (1) bench test determination of activation threshold, (2) bench and healthy volunteer fidelity testing during simulated patient interface leak and different pressure compressions and (3) comparisons with self-report in individuals with neuromuscular disease. The data are reported as summary statistics, compression counts, percentage of recorded versus delivered compressions and concordance (Cohen’s kappa (K) and absolute agreement).ResultsMinimum counter activation pressure under conditions of zero leak was 1.9±0.4 cm H2O. No difference was observed between the number of repetitions delivered and recorded during high airway pressure condition. Interface leak approximating 25% resulted in underestimation of repetition counts, and once the leak was at 50% or beyond, the counter recorded no activity. Faster sampling frequency collected data with more fidelity. Counter data agreed with diary self-report during community trials (16 participants, 960 participant days, 77% agreement, Cohen’s Κ=0.66 and p<0.001). Disagreement typically favoured more diary reported (18%) than counter (5%) sessions.ConclusionsThe performance characteristics of a new lung volume recruitment counter have been established in both laboratory and community settings. Objective usage and dosage data should accelerate new knowledge development and better translation of lung volume recruitment therapy into policy and practice.

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Ke, Xin, Xin Zhao, Ying Sun, and Yun Zhang. "Study on the Kitchen Residues and Cattle Manure Anaerobic Co-Digestion in Bench-Scale Laboratory Test." Applied Mechanics and Materials 260-261 (December 2012): 621–26. http://dx.doi.org/10.4028/www.scientific.net/amm.260-261.621.

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With kitchen residues and cattle manure as raw materials, in temperature (36±1°C) adopt the way of the batch type fermented for kitchen residues and cattle manure, we will have a comparative research between independent anaerobic fermentation and mixed anaerobic fermentation. The results of the experiments show that the gas production and COD removal rate by the anaerobic fermentation of cattle manure independent would be superior to kitchen residues, the optimal effect is the anaerobic fermentation of kitchen residues mixed with cattle manure in all aspects .In this experiment all the kitchen residues are rice, vegetables, meat, eggs and other food all that have been after cooked, containing a large number of fat and salt, such condition is not suitable for the growth of microorganism. The time of gas production is only nine days and gas production rate is extremely low, only 1500ml accumulative gas production, But cattle manure’s accumulative gas production is 3028ml, COD removal rate was 21%, COD removal rate by mixed anaerobic fermentation of kitchen residues and cattle manure can achieve 60.92%.

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Capasso, Clemente, and Ottorino Veneri. "Laboratory Bench to Test ZEBRA Battery Plus Super-Capacitor Based Propulsion Systems for Urban Electric Transportation." Energy Procedia 75 (August 2015): 1956–61. http://dx.doi.org/10.1016/j.egypro.2015.07.235.

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Clark, James, Ken Becker, Al Venosa, and Alun Lewis. "ASSESSING DISPERSANT EFFECTIVENESS FOR HEAVY FUEL OILS USING SMALL-SCALE LABORATORY TESTS." International Oil Spill Conference Proceedings 2005, no. 1 (May 1, 2005): 59–63. http://dx.doi.org/10.7901/2169-3358-2005-1-59.

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ABSTRACT Four bench-scale dispersant tests were used to evaluate three dispersants, Corexit 9500, Superdispersant 25 and Agma Super-concentrate DR 379 with an IFO (Intermediate Fuel Oil) 180 and an IFO 380. Dispersant effectiveness was assessed using the Swirling Flask Test (SFT) and Baffled Flask Test (BFT) developed by the U.S, Environmental Protection Agency (EPA), the Exxon Dispersant Effectiveness Test (EXDET) developed by ExxonMobil, and the Warren Spring Laboratory (WSL) test utilized in the United Kingdom. This study allows comparisons among the small-scale laboratory tests and provides a basis to compare dispersant effectiveness data with findings from at-sea field trials and wave basin studies conducted with the same dispersants and oils. No single dispersant preformed with the highest effectiveness under all test methods, but the data demonstrate that viscous oils such as IFO 380s could be dispersed under the right conditions. The results show that laboratory tests with greater mixing energy yield the highest estimates of dispersant effectiveness.

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Girardot, Sylvain, Pauline Jacquemier, Flavien Mousin, Carine Rendekeu, Sébastien Hardy, and Jean-Pierre Riveline. "All Insulin Pumps Are Not Equivalent: A Bench Test Assessment for Several Basal Rates." Diabetes Technology & Therapeutics 22, no. 6 (June 1, 2020): 476–83. http://dx.doi.org/10.1089/dia.2019.0486.

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Bakri, Badis, Hani Benguesmia, Ahmed Ketata, Slah Driss, and Zied Driss. "Prediction of the Unsteady Turbulent Flow in a Solar Air Heater Test Bench." Modelling, Measurement and Control B 89, no. 1-4 (December 31, 2020): 7–13. http://dx.doi.org/10.18280/mmc_b.891-402.

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In this work, the unsteady turbulent flow in a new solar air heater test bench, developed in our LASEM laboratory, was predicted. The considered system consists of two passages solar air heater separated by an absorber and powered by a fan working in a delivery mode, placed in the hole inlet side the insulation. On this system, a glass is hanging on the front side and an absorber is inserted inside. On the glass side, it is connected to the box prototype through a pipe. The hot air flow is routed towards the box prototype. Two circular holes, are located in the same face of the box prototype. The inlet hole allows the hot air supply. However, the outlet hole allows its escape into the ambient environment. By using the ANSYS Fluent 17.0 software, the Navier-Stokes equations coupled with the standard k-ω turbulence model were resolved. The numerical results were compared with our experimental data, established in the second passage of the solar air heater test bench. The good agreement confirms the validity of the numerical method. The range of temperatures is very useful in many applications such as industrial and domestic applications.

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Mansor, Hasmah, Mohamad K. Azmi Mat Esa, Teddy Surya Gunawan, and Zuriati Janin. "Design of travel angle control of quanser bench-top helicopter using mamdani-based fuzzy logic controller." Indonesian Journal of Electrical Engineering and Computer Science 17, no. 2 (February 1, 2020): 815. http://dx.doi.org/10.11591/ijeecs.v17.i2.pp815-825.

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<span style="font-size: 9pt; font-family: 'Times New Roman', serif;">This research focuses on travel angle control of a laboratory scale bench-top helicopter developed by Quanser Inc. Bench top-helicopter is usually used by engineers and researchers to test their designed controllers before applying to the actual helicopter. Bench-top helicopter has the same behavior as the real helicopter, with 3 degree of freedom. The bench-top helicopter is mounted on a flat surface with two rotors that depends on the voltage supplied to change the direction of the helicopter in 3 different angles. The movement of the helicopter is based on the direction of three-different angles; travel, pitch and yaw angles. The existing Linear Quadratic Regulator-Integral controller used by Quanser Inc has some limitations in terms of tracking capability and settling time; therefore this research is proposed. The objective of this research is to develop Mamdani-based Fuzzy Logic Controller for travel angle control of bench-top helicopter. Performance comparison has been done with the existing Linear Quadratic Regulator-Integral controller in both simulation and hardware. From the test results, it was found that the performance of Fuzzy Logic Controller is better than LQR-I controller especially for closed-loop simulation at desired angle of 30°. The percentage of overshoot of the Fuzzy Logic Controller has been improved from the existing controller which is 4.912% compared to 7.002% for LQR-I.</span>

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Kneiske, T. M., F. Niedermeyer, and C. Boelling. "Testing a model predictive control algorithm for a PV-CHP hybrid system on a laboratory test-bench." Applied Energy 242 (May 2019): 121–37. http://dx.doi.org/10.1016/j.apenergy.2019.03.006.

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Martínez-Gómez, Rafael, Pedro L. Valenzuela, Lidia B. Alejo, Jaime Gil-Cabrera, Almudena Montalvo-Pérez, Eduardo Talavera, Alejandro Lucia, Susana Moral-González, and David Barranco-Gil. "Physiological Predictors of Competition Performance in CrossFit Athletes." International Journal of Environmental Research and Public Health 17, no. 10 (May 24, 2020): 3699. http://dx.doi.org/10.3390/ijerph17103699.

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The aim of this study was to determine the physiological variables that predict competition performance during a CrossFit competition. Fifteen male amateur CrossFit athletes (age, 35 ± 9 years; CrossFit experience, 40 ± 27 months) performed a series of laboratory-based tests (incremental load test for deep full squat and bench press; squat, countermovement and drop jump tests; and incremental running and Wingate tests) that were studied as potential predictors of CrossFit performance. Thereafter, they performed the five Workouts of the Day (WODs) corresponding to the CrossFit Games Open 2019, and we assessed the relationship between the laboratory-based markers and CrossFit performance with regression analyses. Overall CrossFit performance (i.e., final ranking considering the sum of all WODs, as assessed by number of repetitions, time spent in exercises or weight lifted) was significantly related to jump ability, mean and peak power output during the Wingate test, relative maximum strength for the deep full squat and the bench press, and maximum oxygen uptake (VO2max) and speed during the incremental test (all p < 0.05, r = 0.58–0.75). However, the relationship between CrossFit Performance and most laboratory markers varied depending on the analyzed WOD. Multiple linear regression analysis indicated that measures of lower-body muscle power (particularly jump ability) and VO2max explained together most of the variance (R2 = 81%, p < 0.001) in overall CrossFit performance. CrossFit performance is therefore associated with different power-, strength-, and aerobic-related markers.

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Cherubini, C., C. I. Giasi, and N. Pastore. "Bench scale laboratory tests to analyze non-linear flow in fractured media." Hydrology and Earth System Sciences 16, no. 8 (August 6, 2012): 2511–22. http://dx.doi.org/10.5194/hess-16-2511-2012.

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Abstract. The knowledge of flow phenomena in fractured rocks is very important for groundwater resources management in hydrogeological engineering. A critical emerging issue for fractured aquifers is the validity of the Darcian-type "local cubic law", which assumes a linear relationship between flow rate and pressure gradient to accurately describe flow patterns. Experimental data obtained under controlled conditions such as in a laboratory increase our understanding of the fundamental physics of fracture flow and allow us to investigate the presence of non-linear flow inside fractures that generates a substantial deviation from Darcy's law. In this study the presence of non-linear flow in a fractured rock formation has been analyzed at bench scale in laboratory tests. The effects of non-linearity in flow have been investigated by analyzing hydraulic tests on an artificially created fractured rock sample of parallelepiped (0.60 × 0.40 × 0.8 m) shape. The volumes of water passing through different paths across the fractured sample for various hydraulic head differences have been measured, and the results of the experiments have been reported as specific flow rate vs. head gradient. The experimental results closely match the Forchheimer equation and describe a strong inertial regime. The results of the test have been interpreted by means of numerical simulations. For each pair of ports, several steady-state simulations have been carried out varying the hydraulic head difference between the inlet and outlet ports. The estimated linear and non-linear Forchheimer coefficients have been correlated to each other and respectively to the tortuosity of the flow paths. A correlation among the linear and non-linear Forchheimer coefficients is evident. Moreover, a tortuosity factor that influences flow dynamics has been determined.

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Cherubini, C., C. I. Giasi, and N. Pastore. "Bench scale laboratory tests to analyze non-linear flow in fractured media." Hydrology and Earth System Sciences Discussions 9, no. 4 (April 25, 2012): 5575–609. http://dx.doi.org/10.5194/hessd-9-5575-2012.

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Abstract. The knowledge of flow phenomena in fractured rocks is very important for groundwater resources management in hydrogeologic engineering. A critical emerging issue for fractured aquifers is the validity of the Darcian-type "local cubic law" which assumes a linear relationship between flow rate and pressure gradient to accurately describe flow patterns. Experimental data obtained under controlled conditions such as in a laboratory allow to increase the understanding of the fundamental physics of fracture flow and to investigate the presence of non linear flow inside the fractures which brings to substantial deviation from Darcy's law. In this study the presence of non linear flow in a fractured rock formation has been analyzed at bench scale in laboratory tests. The effects of non linearity in flow have been investigated by analyzing hydraulic tests on artificially created fractured rock samples of parallelepiped (0.60 × 0.40 × 0.8 m) shape. The volumes of water passing through different paths across the fractured sample for various hydraulic head differences have been measured, and the results of the experiments have been reported as flow rate/specific discharge vs. head gradient. The experimental results closely match the Forchheimer equation and describe a strong inertial regime. Successively the results of the test have been interpreted by means of numerical simulations. For each pair of ports several steady-state simulations have been carried out varying the hydraulic head difference between inlet and outlet ports. The estimated linear and non linear Forchheimer coefficients have been correlated to each other and, respectively to the tortuosity of the flow paths. A correlation among the linear and non linear Forchheimer coefficients is evident. Moreover, a tortuosity factor has been determined that influences flow dynamics.

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Gomes, Willy Andrade, Enrico Gori Soares, Josinaldo Jarbas da Silva, Fábio Sisconeto de Freitas, Roberto Aparecido Magalhães, Charles Ricardo Lopes, and Paulo Henrique Marchetti. "ELBOW WRAP IMPROVES BENCH PRESS PERFORMANCE IN TRAINED SUBJECTS." Revista Brasileira de Medicina do Esporte 24, no. 4 (August 2018): 291–94. http://dx.doi.org/10.1590/1517-869220182404184214.

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ABSTRACT Introduction: The elastic wrap is widely used by different types of athletes and recreational practitioners of strength training in order to improve weightlifting performance. Objective: The objective was to investigate the acute effects of elbow wrap on strength performance, absolute volume, and rating of perceived exertion/discomfort during the bench press (BP) exercise. Methods: The experimental protocol was divided into three laboratory sessions. At the first session, a bench press familiarization phase was performed with (EW) and without (WEW) elastic elbow wrap. During the second session, the 1RM test was carried out in the bench press exercise under both EW and WEW conditions. At the third session, the repetition maximum (RM) test at 70% of 1RM (EW and WEW) was performed until concentric failure. After each session, subjects were consulted about their rate of perceived exertion (RPE), and discomfort (PSD). A paired student t-test was used to compare the values of 1RM and RMs with and without elastic wraps. Descriptive analysis was used for RPE and PSD. Results: For the 1RM test, there was a significant increase for the EW condition when compared to WEW (p<0.05). In the RMs test and absolute volume calculation, there was a significant increase for the EW condition (p<0.05). RPE did not differ in any of the conditions tested (p>0.05). PSD presented a high degree of discomfort with elastic wraps in all conditions. Conclusion: Elastic elbow wraps increase the load lifted in the 1RM test, and the maximum number of repetitions during the BP exercise, and consequently, the absolute volume. The elastic elbow wrap does not alter the subjective perception of effort, but it increases discomfort during exercise.

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BIELACZYC, Piotr, Andrzej SZCZOTKA, Piotr PAJDOWSKI, and Joseph WOODBURN. "Development of automotive emissions testing equipment and test methods in response to legislative, technical and commercial requirements." Combustion Engines 152, no. 1 (February 1, 2013): 28–41. http://dx.doi.org/10.19206/ce-117010.

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Legislation regarding the reduction of harmful exhaust emissions, greenhouse gases and fuel consumption is one of the strongest drivers of development in automobile design. Strict legislation requires changes to engine calibration and hardware, but also to test facilities and emissions analysis systems; indeed, emissions standards in the European Union (EU), USA and Japan determine not only maximum permissible emissions factors, but also emissions testing methods and laboratory design. This paper is a continuation of [1], and presents the most recent additions to BOSMAL’s emissions testing laboratory – a recently-installed analyzer bench for modal raw exhaust measurement at both pre- and post-catalytic converter sampling locations, as well as EGR ratio calculation, are described in the context of its sophisticated emissions measurement facilities and the increasingly complex testing demands of vehicle and aftertreatment system manufacturers.

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Garren, Steven T., and Donald St P. Richards. "General Conditions for Comparing the Reliability Functions of Systems of Components Sharing a Common Environment." Journal of Applied Probability 35, no. 01 (March 1998): 124–35. http://dx.doi.org/10.1017/s002190020001473x.

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We present general criteria for analyzing the crossing characteristics of R I, the reliability function of an m-of-n system of components operating within a laboratory (or test-bench) environment, and R O, the reliability function of the same system now operating subject to an external environment. Inside the laboratory the components' lifetimes may be dependently distributed, and the external environment is modeled using the general approach of Lindley and Singpurwalla (1986). Our techniques, which utilize results basic to the theory of order statistics, apply to broad classes of external environment models.

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Garren, Steven T., and Donald St P. Richards. "General Conditions for Comparing the Reliability Functions of Systems of Components Sharing a Common Environment." Journal of Applied Probability 35, no. 1 (March 1998): 124–35. http://dx.doi.org/10.1239/jap/1032192557.

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We present general criteria for analyzing the crossing characteristics of RI, the reliability function of an m-of-n system of components operating within a laboratory (or test-bench) environment, and RO, the reliability function of the same system now operating subject to an external environment. Inside the laboratory the components' lifetimes may be dependently distributed, and the external environment is modeled using the general approach of Lindley and Singpurwalla (1986). Our techniques, which utilize results basic to the theory of order statistics, apply to broad classes of external environment models.

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Venkataramaiah, Ch, G. Swathi, and W. Rajendra. "MORRIS WATER MAZE – A BENCH MARK TEST FOR LEARNING AND MEMORY DISORDERS IN ANIMAL MODELS: A REVIEW." Asian Journal of Pharmaceutical and Clinical Research 11, no. 5 (May 1, 2018): 25. http://dx.doi.org/10.22159/ajpcr.2018.v11i5.24292.

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The morris water maze (MWM) was developed by morris as a device to investigate spatial learning and memory in laboratory rats. MWM has become one of the most frequently used laboratory tools in behavioral neuroscience. The MWM task has been often used in the validation of rodent models for neurocognitive disorders (e.g., Parkinson, Alzheimer, Epilepsy, and Schizophrenia), and the evaluation of possible neurocognitive treatments. It is also being used to assess the properties of established potential antipsychotics in animal models of Schizophrenia. The MWM task requires rats to find a hidden platform in a large, circular pool of water that is colored opaque with powdered non-fat milk (or) non-toxic tempera paint where they must swim to the hidden platform. Because they are in the opaque water, the animals cannot see the platform and cannot rely on scent to find the escape route. Instead, they must rely on extra-maze cues. The behavior of rat can be evaluated by analyzing the different parameters such as escape latency, swim speed, and path length, and probe trail. The purpose of this review is to briefly describe procedural aspects, interpretational difficulties of data and advantages of MWM. This paradigm has become a benchmark test for learning and memory difficulties in animal models and preclinical research in general.

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Li, Wen Bo, Yin Gai Jin, Shuang Yin, and Pei Yan Chen. "Electrical Simulation Experiment and the Analysis of Thermal Conductivity of Materials." Advanced Materials Research 989-994 (July 2014): 599–602. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.599.

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s: Jilin university innovation experiment Electrical Simulation Experiment and the Analysis of Thermal Conductivity of Materials aims to solve the problem of thermocouple measuring tenderness in error. Thermocouple is used to measure temperature when measuring unsteady heat conduction in laboratory. The improved measuring method of unsteady heat conduction puts the breakthrough on the electric simulation method. The text bench is constructed by different shapes of conductive plate which is made of the graphite conductive paint, and voltmeter is refitted by diodes and controlled transformer. Through the test bench, we finished the simulation of unsteady heat conduction under the similar thermal conductive boundary conditions. Finally, the error analysis of experiment and the advantages of electric simulation method are given in this paper.

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Fioravanti, Ambra, Antonino Bonanno, Maria Cristina Carotta, Giorgio Paolo Massarotti, Sara Morandi, Nicolò Riboni, and Federica Bianchi. "Novel Methodology Based on Thick Film Gas Sensors to Monitor the Hydraulic Oil Ageing." Proceedings 2, no. 13 (December 10, 2018): 944. http://dx.doi.org/10.3390/proceedings2130944.

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A new methodology for the real time monitoring of hydraulic oil aging based on the vapor analysis using metal oxide semiconductor (MOX) gas sensors has been successfully developed. A dedicated hydraulic test bench was designed and realized to age the oil under controlled condition. Gas chromatographic analyses were performed to detect oil volatile compounds (VOCs) and their concentrations at increasing oil working time. Moreover, a laboratory sensor system have been realized to test the headspace of the same samples. Both measurements highlighted a decrease of the VOCs concentrations.

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XUE, Xiangdang, Ka Wai Eric CHENG, Wing Wa CHAN, Yat Chi FONG, Kin Lung Jerry KAN, and Yulong FAN. "Design, Analysis and Application of Single-Wheel Test Bench for All-Electric Antilock Braking System in Electric Vehicles." Energies 14, no. 5 (February 26, 2021): 1294. http://dx.doi.org/10.3390/en14051294.

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An antilock braking system (ABS) is one of the most important components in a road vehicle, which provides active protection during braking, to prevent the wheels from locking-up and achieve handling stability and steerability. The all-electric ABS without any hydraulic components is a potential candidate for electric vehicles. To demonstrate and examine the all-electric ABS algorithms, this article proposes a single-wheel all-electric ABS test bench, which mainly includes the vehicle wheel, the roller, the flywheels, and the electromechanical brake. To simulate dynamic operation of a real vehicle’s wheel, the kinetic energy of the total rotary components in the bench is designed to match the quarter of the one of a commercial car. The vertical force to the wheel is adjustable. The tire-roller contact simulates the real tire-road contact. The roller’s circumferential velocity represents the longitudinal vehicle velocity. The design and analysis of the proposed bench are described in detail. For the developed prototype, the rated clamping force of the electromechanical brake is 11 kN, the maximum vertical force to the wheel reaches 300 kg, and the maximum roller (vehicle) velocity reaches 100 km/h. The measurable bandwidth of the wheel speed is 4 Hz–2 kHz and the motor speed is 2.5 Hz–50 kHz. The measured results including the roller (vehicle) velocity, the wheel velocity, and the wheel slip are satisfactory. This article offers the effective tools to verify all-electric ABS algorithms in a laboratory, hence saving time and cost for the subsequent test on a real road.

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Dvořáček, Filip. "LABORATORY TESTING OF LEICA AT401 LASER TRACKER." Acta Polytechnica 56, no. 2 (April 30, 2016): 88. http://dx.doi.org/10.14311/ap.2016.56.0088.

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<p>This paper describes laboratory tests on a Leica AT401laser tracker. As the newer Leica AT402 model also uses the same firmware package, most of the results should also be valid for this device. First, we present the instrument’s firmware errors and the software used for testing. The ASME B89.4.19-2006 standard for testing laser trackers is briefly presented. The warm-up effect of the instrument is inspected with respect to both angle measurement and distance measurement. The absolute distance meter (ADM) is compared with a laboratory interferometer on a 30-meter long rail and also on a bench with automated movement of the carriage of the reflector. A time series of measurements for determining the additive constant is evaluated. A simple test of the stability of the distance measurement in field conditions is introduced. Most of the tests were carried out at the Research Institute of Geodesy, Topography and Cartography (RIGTC) and at the Faculty of Civil Engineering (FCE) of the Czech Technical University in Prague (CTU).</p>

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Mažeikiene, Aušra, Mindaugas Rimeika, Marina Valentukevičiene, Vytautas Oškinis, Neringa Paškauskaite, and Evelina Brannvall. "REMOVAL OF PETROLEUM PRODUCTS FROM WATER USING NATURAL SORBENT ZEOLITE." JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT 13, no. 4 (December 31, 2005): 187–91. http://dx.doi.org/10.3846/16486897.2005.9636870.

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An experimental investigation on the removal of petroleum products (PP) from wastewater by natural sorbent zeolite was carried out in a laboratory on a pilot‐scaled test bench. The pilot test bench consisted of: a tank in which gasoline (1 portion) and diesel (1 portion) were mixed mechanically with water; a pump for supplying the mixture to a filter model; a filter model filled with a zeolite layer of 0,2 m height. Zeolite used in this study was from a deposit near the village of Sokyrnytsa in the Ukrainian Transcarpathian region. The test zeolite particle size was 2,5–3,0 mm; 1,5–2,0 mm; 0,63–1,0 mm. The concentration of PP in water was measured before and after the filter every hour. The TOG/ TPH analyser was used for concentration measurements. The experimental study showed that the best adsorption results were reached in the filter with 0,63–1,0 mm particle size of zeolite media. There were 2,25 mg/1 of light hydrocarbons left in the filtrate. Such a concentration satisfies the requirements of standards regulating the percentage of PP in treated wastewater.

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Mattingly, Jerome A., Bryan T. Butman, Mary C. Plank, Rebecca J. Durham, and Barbara J. Robison. "Rapid Monoclonal Antibody-Based Enzyme-Linked Immunosorbent Assay for Detection of Listeria in Food Products." Journal of AOAC INTERNATIONAL 71, no. 3 (May 1, 1988): 679–81. http://dx.doi.org/10.1093/jaoac/71.3.679.

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Abstract A rapid diagnostic test for the detection of Listeria in food products has been created. This test, known as Listeria-Tek, uses 2 monoclonal antibodies specific for Listeria in an enzyme-linked immunosorbent assay (ELISA) format. The test requires only 40 h of broth enrichment with no culturing on solid media. It is extremely simple to perform and easy to interpret, and is at least as sensitive and accurate as the best of the culture methods. The test can be used with dairy products, meat products, and environmental samples. The ELISA test is safely performed on the open bench of the laboratory because no live cultures, no radioactivity, no phage, etc., are necessary. There is no need for special licenses or reserved laboratory space, and no waste disposal problems are encountered. If necessary, one technician could easily perform hundreds of assays per day. A printed data sheet is available for permanent records.

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Longo, Domenico, Giuseppe Manetto, Rita Papa, and Emanuele Cerruto. "Design and Construction of a Low-Cost Test Bench for Testing Agricultural Spray Nozzles." Applied Sciences 10, no. 15 (July 29, 2020): 5221. http://dx.doi.org/10.3390/app10155221.

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Droplet size distribution is probably the most important feature of a spray as it affects all aspects of a phytosanitary treatment, i.e., biological, environmental, and safety aspects. This study describes a low-cost laboratory test bench able to analyze agricultural spray nozzles under realistic conditions. The design of the equipment was mainly based on the ISO 5682-1 standard. It has a couple of 3 m long rails, along which the nozzle under test moves while spraying, controlled by a closed-loop position and speed controller. The drops were captured with three Petri dishes containing silicone oil, photographed by means of a digital single-lens reflex (DSLR) camera, and then analyzed with the ImageJ software in order to measure the usual spray parameters: the volumetric diameters, the Sauter mean diameter, and the number mean diameter. Spray trials and tuning of the system parameters were managed by means of a purposely designed user interface running on a Windows 10 PC. Some tests were carried out by using an Albuz ATR80 orange hollow cone nozzle at the working pressures of 0.3, 0.5, 1.0, and 1.5 MPa. The results about spray quality agree with the factory information, and the whole system, even if some aspects still need improvements, has proven reliable.

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Pałasz, Bartłomiej, Konrad J. Waluś, and Łukasz Warguła. "The determination of the rolling resistance coefficient of a passenger vehicle with the use of roller test bench method." MATEC Web of Conferences 254 (2019): 04007. http://dx.doi.org/10.1051/matecconf/201925404007.

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Contemporary vehicle are designer to be eco-friendly. One of the factors limiting the energy consumption of driving processes is a low value of the rolling resistance coefficient. The rolling resistance depends on the construction features of a tire, exploitation conditions and the type of surface the car moves on. This article presents the results of experimental research of determining the rolling resistance coefficient with the use of laboratory method of roller test bench. The results presented here are a part of a wider research of determining the rolling resistance coefficient and the influence of research method on its value.

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Berruti, Luca, Franco Davoli, Sandro Zappatore, Gianluca Massei, and Amedeo Scarpiello. "Remote Laboratory Experiments in a Virtual Immersive Learning Environment." Advances in Multimedia 2008 (2008): 1–11. http://dx.doi.org/10.1155/2008/426981.

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TheVirtual Immersive Learning(VIL) test bench implements a virtual collaborative immersive environment, capable of integrating natural contexts and typical gestures, which may occur during traditional lectures, enhanced with advanced experimental sessions. The system architecture is described, along with the motivations, and the most significant choices, both hardware and software, adopted for its implementation. The novelty of the approach essentially relies on its capability of embedding functionalities that stem from various research results (mainly carried out within the VICOM national project), and “putting the pieces together” in a well-integrated framework. These features, along with its high portability, good flexibility, and, above all, low cost, make this approach appropriate for educational and training purposes, mainly concerning measurements on telecommunication systems, at universities and research centers, as well as enterprises. Moreover, the methodology can be employed for remote access to and sharing of costly measurement equipment in many different activities. The immersive characteristics of the framework are illustrated, along with performance measurements related to a specific application.

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Velsovskij, Anatoly, Liliya Mukhametova, Anton Sinitsyn, and Denis Karpov. "Study of processes of artificial freezing and thawing of soils when developing a model of energy-efficient radiation-convection setup." E3S Web of Conferences 178 (2020): 01018. http://dx.doi.org/10.1051/e3sconf/202017801018.

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This paper considers one stage of development of a new power plant for thawing frozen soil during emergency repairs. It includes experimental study of temperature conditions for freezing and artificial thawing of various types of soils in field and laboratory conditions. The main results of laboratory research are presented. The operation process of an industrial prototype of power plant is modelled on a test bench using analogues of radiation-convective heat generators. The obtained calculated and experimental characteristics of artificial thawing of frozen soil by a surface radiation-convective method will allow one to calculate the thermal power of a power plant, and to carry out its design and thermal calculation.

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Journal articles on the topic 'Laboratory test bench'

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