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Journal articles on the topic 'NVH tests'

Author: Grafiati

Published: 1 June 2024

Last updated: 31 July 2025

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1

Chakroun, Ala Eddin, Mattia Battarra, and Emiliano Mucchi. "Influence of the Hydraulic Circuit Setup on the Dynamic Performance of an Axial Piston Pump by Numerical and Experimental Analysis." Mathematical Problems in Engineering 2024 (April 18, 2024): 1–16. http://dx.doi.org/10.1155/2024/2966138.

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The hydraulic circuit in hydraulic mechanisms may be the cause of several vibration anomalies. Flexible pipes, in particular, commonly used in test rigs, may be the source of vibration issues due to their relatively low natural frequencies altering the pump noise, vibration, and harshness (NVH) performance. The purpose of this study is to detail a methodology based on lumped parameter modeling and experiments to analyze the circuit NVH behavior. An experimental study is carried out on two pump designs to determine the outlet pressure fluctuation of various test rig configurations. Numerical si

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Singh, Rahul, Amogh Nalawade, Manish Pande, and Punit Singh. "Vibration and noise characteristics of an inverter for electric vehicle application." Vibroengineering Procedia 50 (September 21, 2023): 145–51. http://dx.doi.org/10.21595/vp.2023.23563.

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Noise, Vibration & Harshness (NVH) is one of the key parameters associated with comfort of an automobile. An Electric Vehicle (EV) consists of transmission driven by electric motor which ultimately gets its power or current supply from inverter. As per Electric vehicle architecture, motor ranks first followed by transmission and inverter in terms of NVH performance. The function of an inverter is to convert DC current from battery source to 3-phase AC current which goes to electric motor. Torque and speed characteristics of motor is dependent on current and voltage supply from inverter. He

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Schweighardt, A., B. Vehovszky, and D. Feszty. "The effect of the preload determination process on dynamic mechanical properties." Journal of Physics: Conference Series 2677, no. 1 (2023): 012007. http://dx.doi.org/10.1088/1742-6596/2677/1/012007.

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Abstract NVH simulation and experimental methods are getting more and more important because of the increased customer needs for reliability and comfort. In order to obtain appropriate NVH simulation results accurate material properties have to be provided as input parameters. In case of the dynamic mechanical property determination of acoustic viscoelastic foams the results may vary greatly depending on the measurement settings and the quality of the measurement. This study evaluates the effect of the preload determination process on dynamic mechanical properties and the repeatability of the

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Guinebretière, Marie-Hélène, Sandrine Auger, Nathalie Galleron, et al. "Bacillus cytotoxicus sp. nov. is a novel thermotolerant species of the Bacillus cereus Group occasionally associated with food poisoning." International Journal of Systematic and Evolutionary Microbiology 63, Pt_1 (2013): 31–40. http://dx.doi.org/10.1099/ijs.0.030627-0.

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An aerobic endospore-forming bacillus (NVH 391-98T) was isolated during a severe food poisoning outbreak in France in 1998, and four other similar strains have since been isolated, also mostly from food poisoning cases. Based on 16S rRNA gene sequence similarity, these strains were shown to belong to the Bacillus cereus Group (over 97 % similarity with the current Group species) and phylogenetic distance from other validly described species of the genus Bacillus was less than 95 %. Based on 16S rRNA gene sequence similarity and MLST data, these novel strains were shown to form a robust and wel

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Dziechciarz, Arkadiusz, Aron Popp, Claudia Marțiș, and Maciej Sułowicz. "Analysis of NVH Behavior of Synchronous Reluctance Machine for EV Applications." Energies 15, no. 8 (2022): 2785. http://dx.doi.org/10.3390/en15082785.

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In this paper, an analysis of noise and vibration of a synchronous reluctance machine for EV applications is performed. The analyzed machine was designed for electric vehicle application. The noise and vibration of a synchronous reluctance machine were first estimated during simulations; next, the obtained results were validated during laboratory tests. The analyzed model of the machine was simplified and included only stator core as it was assumed to be the main source of the machine vibration and generated noise. To simulate the noise and vibration of the machine, multiphysics modeling of th

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Guo, Han, Jianwu Zhang, and Haisheng Yu. "Robust optimisation of dynamic and NVH characteristics for compound power-split hybrid transmission." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 233, no. 4 (2019): 817–26. http://dx.doi.org/10.1177/1464419319856774.

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In this paper, vibro-acoustic characteristics of a power-split hybrid transmission including a compound planetary gear set are investigated by numerical procedure and refined system dynamics modelling. For validation of the numerical predictions, bench tests are performed for dynamic and acoustic responses of the hybrid transmission, contribution rates of acoustic radiation power induced due to the planetary gears, support bearings, transmission shafts and the gearbox housing are estimated. In improving the noise, vibration and harshness (NVH) performance of the transmission during hybrid vehi

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Li, Hui Bin, Awais A.M., Qi Chen Lu, and De Quan Jin. "Experimental Study on Durability and NVH of Rear Driving Axle of Minibus." Advanced Materials Research 655-657 (January 2013): 511–14. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.511.

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Experiments on the durability for the rear driving axle were conducted in bench tests. By using time domain and frequency domain methods, the vibration and noise signals at bearings of driving axle were sampled and then analyzed. On the one hand, we find that the vibration level and noise level change with the wear of gears and bearings. On the other hand, with the development of the wear of gear and bearings, the frequency components of vibration and noise change with time. These experimental results will give help to further study of the durability and NVH characteristic of the rear driving

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Dong, Yangyang, Changyan Du, Xiaohui Wang, Yi Fan, Shengyou Liao, and Yiyong Han. "Research on the influence of plastic oil pan of the engine on the NVH performance." Journal of Physics: Conference Series 2932, no. 1 (2025): 012033. https://doi.org/10.1088/1742-6596/2932/1/012033.

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Abstract To analyze the dynamic characteristics of diesel engine camshafts and the factors affecting camshaft speed fluctuations, a multi-body dynamic model for gear transmission analysis is established. We analyze and consider the calculation results of spring preload, spring stiffness, cam profile, crankshaft timing gear speed fluctuation, gear meshing clearance, accessory load, and part rotational inertia on the fluctuation of camshaft angular velocity. The results show that gear clearance has a significant impact on camshaft speed fluctuation, while other factors have a relatively small im

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Shi, Hui, Wenku Shi, Liang Sun, and Zhiyong Chen. "Improving Camper Comfort by Optimizing the Vibration Isolation of Air-Conditioning Compressor." Mathematical Problems in Engineering 2020 (December 23, 2020): 1–14. http://dx.doi.org/10.1155/2020/2958604.

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Compressors are the main excitation source of vibration and noise in camper air-conditioning systems, which directly affects the NVH characteristics in campers. The vibration and noise reduction for camper comfort improvement can be implemented by the optimization method. This paper presents vibration and noise improvement in camper by systematically optimizing the vibration isolation performance of air-conditioning compressor. To analyze the compressor vibration characteristics, operational vibration tests under different conditions and modal identification are implemented. Based on the analy

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Yong, Sukjun, and JangSeok Park. "A study on the new PET composite sound-absorbing material applicable to automotive interior materials." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 265, no. 4 (2023): 3297–302. http://dx.doi.org/10.3397/in_2022_0466.

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Various types of sound-absorbing materials are used in vehicles according to external noise and conditions. As sound-absorbing materials for automobiles, there are fiber-type materials such as PET fiber or glass fiber, and foam-type materials such as polyurethane. Among them, PET fiber materials have excellent advantages in terms of weight reduction and recycling, but urethane foam is applied due to their low NVH performance and compressive stress. Recently, as interest in eco-friendly vehicles increases, development of sound absorbing materials using PET fiber is required. To improve this pro

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Ding, Xiaoyu, Wei Wang, and Xinbo Chen. "The Modularized Development of a Wheel-Side Electric Drive System Using the Process of Hobbing and Form Grinding." Applied Sciences 15, no. 3 (2025): 1483. https://doi.org/10.3390/app15031483.

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The wheel-side electric drive system is a melding of a vehicle powertrain and suspension system, which saves chassis space and can adapt to different models. To achieve the goal of highly modularized development, the system is supposed to meet the requirements of various working conditions without changing the interface state. The electric motor drives the wheel through two-stage fixed axis helical gears, so the transmission is short in path and acts as the suspension arm at the same time. As a result, the gears are critical to output robustness and NVH performance. The modeling accuracy is de

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YANG, Yoonsang, and Seung LEE. "A study on road noise reduction using recycled material." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 270, no. 7 (2024): 4105–9. http://dx.doi.org/10.3397/in_2024_3414.

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Recently, there has been a shift in the paradigm of the automobile industry from internal combustion engines to electric vehicles. An NVH research has also evolved rapidly from studying noise and vibration in conventional internal combustion engines to exploring methods for reducing road noise. A road noise during vehicle operation can be amplified by the resonance of the cavity inside chassis. As a countermeasure, so, filler materials have been applied inside the chassis to reduce resonance, However, fillers applied to existing cavities, such as pads and polyurethane foam, generally focus on

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Zhang, Na, Zhenhuan Yu, and Zhiyuan Liu. "Recommendations for Preventing Free-Stroke Failures in Electric Vehicle Suspension Dampers Based on Experimental and Numerical Approaches." World Electric Vehicle Journal 16, no. 7 (2025): 392. https://doi.org/10.3390/wevj16070392.

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Free stroke, which means the intermittent no-load operation state of dampers, can cause an abnormal noise and unavoidably lead to the deterioration of vehicle NVH performance. In electric vehicles, the noise is particularly intolerable because there are no engine sounds to mask it. Focusing on this, the mechanism of the free-stroke phenomenon is analyzed. A method, which involves parametric models and numerical simulation, is proposed to prevent free-stroke phenomena during the damper design phase. This paper proposes a free-stroke mechanism based on a fluid–structure interaction (FSI) numeric

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Kyprianou, A., J. Giacomin, K. Worden, M. Heidrich, and J. Bocking. "Differential evolution based identification of automotive hydraulic engine mount model parameters." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 214, no. 3 (2000): 249–64. http://dx.doi.org/10.1243/0954407001527402.

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Hydraulic engine mounts are commonly used in automotive applications, and numerical models exist for performing full-vehicle noise, vibration and harshness (NVH) studies by means of multibody simulation. The parameters of these models are usually determined by the manufacturer from first-principle numerical calculations, or by means of direct testing of the individual components. This paper describes, instead, a four-step identification method developed to determine the parameter values of a specific hydromount numerical model, the Freudenberg hydromount equations, a set of highly non-linear p

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Farshidianfar, A., M. Ebrahimi, H. Rahnejat, M. T. Menday, and M. Moavenian. "Optimization of the high-frequency torsional vibration of vehicle driveline systems using genetic algorithms." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 216, no. 3 (2002): 249–62. http://dx.doi.org/10.1177/146441930221600305.

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Vehicle drivelines with manual transmissions are exposed to different dynamic engine torques under driving conditions. Engine torque can dramatically vary with throttle demand from coast to drive condition and, conversely, with throttle release from drive to coast. Abrupt application or release of throttle in slow moving traffic or rapid engagement of the clutch can be followed by an audible response, referred to in industry as the clonk noise. This paper presents a complete dynamic model of a vehicle driveline for the optimization of high-frequency torsional vibration by the distributed-lumpe

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Szlichting, Maciej, Dariusz M. Bieliński, Jacek Rogowski, Marcin Kozanecki, and Tomasz Dąbrowski. "PHYSICOCHEMICAL ASPECTS OF THE WORK OF PASSENGER CAR BRAKE LININGS. PART II THE EFFECT OF LUBRICATING ADDITIVES." Tribologia 301, no. 3 (2022): 121–36. http://dx.doi.org/10.5604/01.3001.0016.1043.

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The paper presents the influence of various systems of lubricating additives which determine the performance of the friction materials of brake linings. The base hybrid friction material formulation was modified with various types of lubricating additives. These additives are divided into groups containing commonly used lubricating materials: carbons and sulphides, compounded in various proportions, influencing the formation and structure of the so-called third body layer (TBL) on the surface of the brake disc because of braking. Raman Spectroscopy (RS), time of flight Secondary Ion Mass Spect

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Szlichting, Maciej, Dariusz M. Bieliński, Iwona Jóźwik, Anna Kosińska, and Tomasz Dąbrowski. "PHYSICOCHEMICAL ASPECTS OF THE WORK OF PASSENGER CAR BRAKE LININGS. Part I: THE EFFECT OF FRICTIONAL ADDITIVES." Tribologia 300, no. 2 (2022): 89–100. http://dx.doi.org/10.5604/01.3001.0015.9728.

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The paper presents the influence of various systems of abrasive additives which determine the performance of the friction materials of brake pads. A friction material was used for the tests, in which the base recipe was modified with various types of abrasive additives: 1. “low steel” – of low steel content, containing aluminium and chromium oxides; 2. “hybrid” – containing in addition to abrasive components from the low steel family, abrasive components such as zirconium silicate, magnesium oxide or iron oxides, which are characteristic of the family of asbestos-free organic materials (NAO);

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Mostafavi Yazdi, Seyed Jamaleddin, Seongchan Pack, Foroogh Rouhollahi, and Javad Baqersad. "A Modeling Framework to Develop Materials with Improved Noise and Vibration Performance for Electric Vehicles." Energies 16, no. 9 (2023): 3880. http://dx.doi.org/10.3390/en16093880.

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The automotive and aerospace industries increasingly use lightweight materials to improve performance while reducing fuel consumption. Lightweight materials are frequently used in electric vehicles (EVs). However, using these materials can increase airborne and structure-borne noise. Furthermore, EV noise occurs at high frequencies, and conventional materials have small damping. Thus, there is an increasing need for procedures that help design new materials and coatings to reduce the transferred and radiated noise at desired frequencies. This study pioneered new techniques for microstructure m

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Dowsett, Amy, Dan O’Boy, Stephen Walsh, Ali Abolfathi, and Steve Fisher. "The prediction of measurement variability in an automotive application by the use of a coherence formulation." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 232, no. 12 (2017): 1694–700. http://dx.doi.org/10.1177/0954407017734768.

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Variability between nominally identical vehicles is an ever-present problem in automotive vehicle design. In this paper, it is shown that it is possible to quantify and, therefore, separate the measurement variability arising from a number of tests on an individual vehicle from the vehicle-to-vehicle variability arising from the manufacturing process with a series of controlled experiments. In this paper, coherence data is used to identify the measurement variability and, thus, to separate these two variability sources. In order to illustrate the methodology, a range of nominally identical aut

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Kowalski, D., M. D. Rao, J. Blough, and S. Gruenberg. "Dynamic testing of shock absorbers under non-sinusoidal conditions." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 216, no. 5 (2002): 373–84. http://dx.doi.org/10.1243/0954407021529183.

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This paper deals with the dynamic characterization of an automotive shock absorber, the continuation of an earlier work [1]. The objective of this ongoing research is to develop a testing and analysis methodology for obtaining dynamic properties of automotive shock absorbers for use in CAE-NVH low-to-mid-frequency chassis models. Stepped sine sweep excitation is currently used in industry to obtain shock absorber parameters along with their frequency and amplitude dependence. Sine-on-sine testing, which involves excitation using two different sine waves, has been done in this study to understa

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Gräbner, Nils, Dominik Schmid, and Utz von Wagner. "On Drum Brake Squeal—Assessment of Damping Measures by Time Series Data Analysis of Dynamometer Tests and Complex Eigenvalue Analyses." Machines 11, no. 12 (2023): 1048. http://dx.doi.org/10.3390/machines11121048.

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Brake squeal—an audible high-frequency noise phenomenon in the range between 1 kHz and 15 kHz resulting from self-excited vibrations—is one of the main cost drivers while developing brake systems. Increasing damping is often a crucial factor in the context of self-excited vibrations. Countermeasures applied for preventing brake squeal have been investigated particularly for disk brakes in the past. However, in recent years, drum brakes have once again become more important, partly because of the issue of particle emissions. Concerning noise problems, drum brakes have a decisive advantage compa

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Bhavi, Iresh, Vinay Kuppast, and Shivakant Kurbet. "Experimental Setup and Methodology to Carryout Fatigue Testing of Spiral Bevel Gears Used in Differential Gear Box Using NVH Approach." Applied Mechanics and Materials 852 (September 2016): 545–50. http://dx.doi.org/10.4028/www.scientific.net/amm.852.545.

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Currently the fatigue testing of bevel gears are being done by using non rotating type of fixtures that applies fatigue load on a single tooth, which does not resemble the actual loading condition in an automotive differential gear box. This paper discusses the experimental setup with the noise and vibration analysis approach to determine the signature of failures of spiral bevel gears. The proposed experimental setup seems promising for further research and development in the fatigue testing of spiral bevel gears. The Crown pinion and wheel assembly is used for the testing. The pinion is conn

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Sidorova, Valentina Ivanovna, Saule Zhangirovna Asylbekova, Nadezhda Ivanovna Yеnvareva, et al. "Extruded starter compound feeds for clarid catfish." Vestnik of Astrakhan State Technical University. Series: Fishing industry 2020, no. 2 (2020): 82–92. http://dx.doi.org/10.24143/2072-9502-2020-2-82-93.

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Industrial fish-breeding is a promising trend for freshwater aquaculture development. The production of clarid catfish in Kazakhstan has advantages over traditionally grown fish species (trout, sturgeon) due to their valuable edible qualities. Clarid catfish grows very quickly even at high seeding densities, is undemanding to the environment, resistant to diseases, and effectively assimilates food. When growing clarid catfish in water recycling systems it is possible to refuse using oxygen equipment, because the fish species can use atmospheric air for breathing. As a result, the construction

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Walsh, JM. "NIH drug tests." Science 240, no. 4850 (1988): 268.1–268. http://dx.doi.org/10.1126/science.3353719.

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Mr., Pandurang Maruti Jadhav, Kishor B. Waghulde Dr., and Rupesh V. Bhortake Dr. "Car Door Assembly FE Analysis - A Review for NVH Performance Research." International Journal of Innovative Technology and Exploring Engineering (IJITEE) 12, no. 6 (2023): 11–21. https://doi.org/10.35940/ijitee.D9455.0512623.

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<strong>Abstract: </strong>When talking about the car door and its importance, all aspects should be considered. Main applications of the door is the protection of passengers from outside weather variations such as air flow, temperatures, dust, side impact, etc. As a part of the car, it is connected to the car body by means of hinges, latch, and weather seals. It is excited by all excitation sources which excite to the vehicle plus vehicle accessories. Car door design evaluation is nothing but simulation of real application of door with different loading and boundary connections. An extensive

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IJRAME, Journal. "Rod & Pin Optimization on 6.4L Heavy Duty Engine for bushing wear and noise reduction." International Journal of Research in Aeronautical and Mechanical Engineering 12, no. 11 (2024): 18–39. https://doi.org/10.5281/zenodo.14047207.

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This research paper on a problem that has persisted over the years in heavy-duty engines is commonly known as "pin tick." It refers to a condition whereby there is very significant wear of the rod bushing. The problem was observed in various heavy-duty engines, whereby wear exceeded 30 μm with noticeable play between the rod bushing and pin. With previous attempts to solve the problem—like implementing roundness specifications for the pin bore—the problem still prevails. Testing procedures for noise, vibration, and hardness were carried out to understand the challenge completely

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Mr., Pandurang Maruti Jadhav. "Car Door Sound Quality Assessment - A Review for NVH Performance Research." International Journal of Engineering and Advanced Technology (IJEAT) 13, no. 3 (2024): 14–24. https://doi.org/10.35940/ijeat.C4357.13030224.

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<strong>Abstract:</strong> Customer comfort in terms of NVH is a tangible and in-tangible effect. NVH is directly and indirectly connected to the psychoacoustics of human beings and lives. As a part of the advanced NVH analysis, the effects of noise have been studied in terms of psychoacoustic parameters such as loudness, sharpness, roughness, fluctuation strength, tonality, etc. Car door or door assembly is an integral part of the car or vehicle. The door is softly and flexibly connected to the main body of the vehicle; it protects passengers from weather effects and accidental impacts. Becau

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&NA;. "NIH Provides Resource to Clarify Genetic Tests." Nurse Educator 37, no. 4 (2012): 172. http://dx.doi.org/10.1097/nne.0b013e31825a868b.

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Holden, C. "NIH scientists balk at random drug tests." Science 239, no. 4841 (1988): 724. http://dx.doi.org/10.1126/science.3340853.

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Fares, Laouar, Bensama Manel, Rabia Ridha, and Boublata Lotfi. "Normal pressure hydrocephalus. Results of shunting correlated with diagnostic tests in 55 patients." Normal pressure hydrocephalus. Results of shunting correlated with diagnostic tests in 55 patients 3, no. 1 (2021): 01–09. https://doi.org/10.36811/rjnnd.2021.110004.

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<strong>Object:</strong> The purpose of this study was to evaluate the efficacy of ventricular shunting in normal pressure hydrocephalus (NPH). <strong>Methods:</strong> The authors retrospectively studied outcomes in NPH patients in whom shunts were implanted. At follow-up examinations up to one year, clinical symptoms were recorded according to a new NPH outcome rating scale, the modified Rankin score and the Mini-Mental State Examination. Comorbidities and complications during this period were also analyzed. <strong>Results:</strong> A total of 55 patients with NPH were inclu

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Fordham, J. N. "From the NIH. Magnetic device tests for iron overload." JAMA: The Journal of the American Medical Association 254, no. 8 (1985): 1006–8. http://dx.doi.org/10.1001/jama.254.8.1006.

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Langer, Kailey, Cheshire Hardcastle, Hanna Hausman, et al. "28 Factor Structure of Conventional Neuropsychological Tests and NIH-Toolbox in Healthy Older Adults." Journal of the International Neuropsychological Society 29, s1 (2023): 710. http://dx.doi.org/10.1017/s135561772300886x.

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Objective:The National Institutes of Health-Toolbox cognition battery (NIH-TCB) is widely used in cognitive aging studies and includes measures in cognitive domains evaluated for dimensional structure and psychometric properties in prior research. The present study addresses a current literature gap by demonstrating how NIH-TCB integrates into a battery of traditional clinical neuropsychological measures. The dimensional structure of NIH-TCB measures along with conventional neuropsychological tests is assessed in healthy older adults.Participants and Methods:Baseline cognitive data were obtain

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Morais, Cláudio Marcelo. "The nth logarithm test for checking the absolute convergence of series." Núcleo do Conhecimento 01, no. 09 (2023): 78–97. https://doi.org/10.32749/nucleodoconhecimento.com.br/mathematical-olympiads/nth-logarithm.

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In this article, I present a test for absolute convergence of infinite numerical series using the concept of logarithm with base n indeterminate. Although there are cases where the current test is difficult to apply and others where inconclusive results may be obtained, it should be seen as an additional resource that mathematics students can use alongside the tests already available to verify the absolute convergence of a series.

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Hay, Mark E. "Negating the plant apparency model: rigorous tests are the fuel of progress." New Phytologist 210, no. 3 (2016): 770–71. http://dx.doi.org/10.1111/nph.13953.

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Burnett, Mark G., Seema S. Sonnad, and Sherman C. Stein. "Screening tests for normal-pressure hydrocephalus: sensitivity, specificity, and cost." Journal of Neurosurgery 105, no. 6 (2006): 823–29. http://dx.doi.org/10.3171/jns.2006.105.6.823.

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Object Many tests have been proposed to help choose candidates for shunt insertion in cases of suspected normal-pressure hydrocephalus (NPH). It is unclear what sensitivity and specificity a prospective test must have to improve outcomes, compared with the results of automatic shunt insertion. Methods The authors adapted the decision analysis model used in a companion article to allow for application of a screening test. Using the reported sensitivities and specificities of several such tests, they evaluated the effects such tests would have on the expected outcome of an average 65-year-old pa

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Holdnack, James A., Grant L. Iverson, Noah D. Silverberg, David S. Tulsky, and Allen W. Heinemann. "NIH toolbox cognition tests following traumatic brain injury: Frequency of low scores." Rehabilitation Psychology 62, no. 4 (2017): 474–84. http://dx.doi.org/10.1037/rep0000145.

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Chartier, Philippe. "L’apport des tests d’aptitudes dans le recrutement : l’exemple de la NV5-R." Psychologie du Travail et des Organisations 15, no. 2 (2009): 137–50. http://dx.doi.org/10.1016/s1420-2530(16)30179-0.

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Cacho, N. Ivalú, Daniel J. Kliebenstein, and Sharon Y. Strauss. "Macroevolutionary patterns of glucosinolate defense and tests of defense-escalation and resource availability hypotheses." New Phytologist 208, no. 3 (2015): 915–27. http://dx.doi.org/10.1111/nph.13561.

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Burns, Jean H., Jennifer E. Murphy, and Yu‐Long Zheng. "Tests of alternative evolutionary models are needed to enhance our understanding of biological invasions." New Phytologist 222, no. 2 (2018): 701–7. http://dx.doi.org/10.1111/nph.15584.

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Baer, George M. "Evaluation of an animal rabies vaccine by use of two types of potency tests." American Journal of Veterinary Research 58, no. 8 (1997): 837–40. http://dx.doi.org/10.2460/ajvr.1997.58.08.837.

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Abstract Objective To evaluate the potency of an inactivated animal rabies vaccine for domestic animals by use of 2 types of potency tests after challenge exposure with a laboratory standard virus or 1 of 5 viruses obtained from various wildlife species. Animals 384 mice vaccinated twice intraperitoneally; 384 mice vaccinated once IM. Procedure Mice vaccinated with an inactivated, adjuvanted rabies vaccine for domestic animals were challenge exposed with the common fixed challenge virus or 1 of 5 rabies viruses obtained from wild animal species (street viruses) that most commonly transmit the

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Hušková, Marie, Simos G. Meintanis, Natalie Neumeyer, and Charl Pretorius. "Independence tests in semiparametric transformation models." South African Statistical Journal 52, no. 1 (2018): 1–13. http://dx.doi.org/10.37920/sasj.2018.52.1.1.

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Consider an observed response Y which, following a certain transformation T(Y), can be expressed by a homoskedastic nonparametric regression model referenced by a vector X of regressors. If this transformation model is indeed valid then conditionally on X, the values of T(Y) may be viewed as being just location shifts of the regression error, for some value of the transformation parameter. We propose tests for the validity of this model, and establish the limiting distribution of the test statistics under the null hypothesis and under alternatives. Since the null distribution is complicated we

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Benko, I. S., B. Bhargava, and W. N. Rothenbuhler. "Prototype NGH Subsynchronous Resonance Damping Scheme. Part II???Switching and Short Circuit Tests." IEEE Power Engineering Review PER-7, no. 11 (1987): 48. http://dx.doi.org/10.1109/mper.1987.5526912.

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Rubinstein, Wendy S., Brandi L. Kattman, Adriana J. Malheiro, et al. "The NIH genetic testing registry: Hereditary, pharmacogenetic, and somatic tests for oncology practice." Journal of Clinical Oncology 32, no. 15_suppl (2014): 11104. http://dx.doi.org/10.1200/jco.2014.32.15_suppl.11104.

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Benko, I. S., B. Bhargava, and W. N. Rothenbuhler. "Prototype NGH Subsynchronous Resonance Damping Scheme Part II - Switching and Short Circuit Tests." IEEE Transactions on Power Systems 2, no. 4 (1987): 1040–47. http://dx.doi.org/10.1109/tpwrs.1987.4335298.

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Kodama, Yusuke, Shi Jie Zhu, Yukiko Nakahara, Arimitsu Usuki, and Makoto Kato. "Fatigue Fracture of Clay Reinforced Nylon Nanocomposites." Materials Science Forum 750 (March 2013): 11–14. http://dx.doi.org/10.4028/www.scientific.net/msf.750.11.

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Nylon 6 clay hybrid (NCH) composite consists of nano-sized Montmorillonite and nylon 6 matrix. The testing materials were nylon 6, NCH-2 (2 wt% clay reinforced composite) and NCH-5 (5 wt% clay reinforced composite). Fatigue tests at the glass transition temperatures (35 °C and 50 °C) were performed with a stress ratio of 0.1 and frequency of 0.1Hz. NCH-2 had the highest fatigue strength at room temperature, but NCH-5 had the highest fatigue strengths at 35 °C and 50 °C. It was found that the fracture origin changed from surfaces to interior of specimens with an increase in temperature in NCH-2

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Sergi, Rachele, Devis Bellucci, Roberta Salvatori, and Valeria Cannillo. "Chitosan-Based Bioactive Glass Gauze: Microstructural Properties, In Vitro Bioactivity, and Biological Tests." Materials 13, no. 12 (2020): 2819. http://dx.doi.org/10.3390/ma13122819.

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Passive commercial gauzes were turned into interactive wound dressings by impregnating them with a chitosan suspension. To further improve healing, and cell adhesion and proliferation, chitosan/bioactive glass wound dressings were produced with the addition of (i) 45S5, (ii) a Sr- and Mg-containing bioactive glass, and (iii) a Zn-containing bioactive glass to the chitosan suspension. SEM and FTIR analyses evidenced positive results in terms of incorporation of bioactive glass particles. Bioactivity was investigated by soaking chitosan-based bioactive glass wound dressings in simulated body flu

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Solana, Elisabeth, Maria Antonia Poca, Juan Sahuquillo, Bessy Benejam, Carme Junqué, and Mithilesh Dronavalli. "Cognitive and motor improvement after retesting in normal-pressure hydrocephalus: a real change or merely a learning effect?" Journal of Neurosurgery 112, no. 2 (2010): 399–409. http://dx.doi.org/10.3171/2009.4.jns081664.

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Object The test-retest method is commonly used in the management of patients with normal-pressure hydrocephalus (NPH). One of the most widely used techniques in the diagnosis of this condition is evaluation of the patient's response to CSF evacuation by lumbar puncture (a so-called tap test or spinal tap). However, interpretation of improved results in subsequent evaluations is controversial because higher scores could reflect a real change in specific abilities or could be simply the result of a learning effect. Methods To determine the effect of testing-retesting in patients with NPH, the au

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Gershon, Richard C., Karon F. Cook, Dan Mungas, et al. "Language Measures of the NIH Toolbox Cognition Battery." Journal of the International Neuropsychological Society 20, no. 6 (2014): 642–51. http://dx.doi.org/10.1017/s1355617714000411.

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AbstractLanguage facilitates communication and efficient encoding of thought and experience. Because of its essential role in early childhood development, in educational achievement and in subsequent life adaptation, language was included as one of the subdomains in the NIH Toolbox for the Assessment of Neurological and Behavioral Function Cognition Battery (NIHTB-CB). There are many different components of language functioning, including syntactic processing (i.e., morphology and grammar) and lexical semantics. For purposes of the NIHTB-CB, two tests of language—a picture vocabulary test and

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Ostendorf, David W., William G. Lukas, and Don J. DeGroot. "Partially penetrating slug tests in an unweathered till layer." Hydrology Research 48, no. 1 (2016): 117–32. http://dx.doi.org/10.2166/nh.2016.159.

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This research improves field based estimates of aquitard compressibility and permeability. A semianalytical model of partially penetrating, overdamped slug tests achieves this objective. The short term solution is an existing fully penetrating model, the long term solution is the polar residue of an inverse Laplace transform, and an exponential spline function patches the solutions together. Large amplitude slug test data from ten pairs of partially penetrating monitoring wells installed in an unweathered till at Scituate Hill in eastern Massachusetts calibrate the model. The deposit is bound

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Abram, Katrin, Silvia Bohne, Peter Bublak, et al. "The Effect of Spinal Tap Test on Different Sensory Modalities of Postural Stability in Idiopathic Normal Pressure Hydrocephalus." Dementia and Geriatric Cognitive Disorders Extra 6, no. 3 (2016): 447–57. http://dx.doi.org/10.1159/000450602.

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Background/Aims: Postural instability in patients with normal pressure hydrocephalus (NPH) is a most crucial symptom leading to falls with secondary complications. The aim of the current study was to evaluate the therapeutic effect of spinal tap on postural stability in these patients. Methods: Seventeen patients with clinical symptoms of NPH were examined using gait scale, computerized dynamic posturography (CDP), and neuropsychological assessment. Examinations were done before and after spinal tap test. Results: The gait score showed a significant improvement 24 h after spinal tap test in al

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