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Relevant bibliographies by topics / Tightness of Performance

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Academic literature on the topic 'Tightness of Performance'

Author: Grafiati

Published: 6 September 2023

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Journal articles on the topic "Tightness of Performance"

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Fletcher, James W. A., Lisa Wenzel, Verena Neumann, et al. "Surgical performance when inserting non-locking screws: a systematic review." EFORT Open Reviews 5, no. 1 (2020): 26–36. http://dx.doi.org/10.1302/2058-5241.5.180066.

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Billions of screws are inserted by surgeons each year, making them the most commonly inserted implant. When using non-locking screws, insertion technique is decided by the surgeon, including how much to tighten each screw. The aims of this study were to assess, through a systematic review, the screw tightness and rate of material stripping produced by surgeons and the effect of different variables related to screw insertion. Twelve studies were included, with 260 surgeons inserting a total of 2793 screws; an average of 11 screws each, although only 1510 screws have been inserted by 145 surgeon

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Curran, Hannah, and Stella Chapman. "Performance enhancing or unnecessary pressure?" Equine Health 2019, no. 47 (2019): 26–31. http://dx.doi.org/10.12968/eqhe.2019.47.26.

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Zheng, Xiao Tao, Jia Lin Zi Pan, and Jiu Yang Yu. "Effect of Gasket Compression Resilience on the Tightness of Bolted Flange System." Applied Mechanics and Materials 853 (September 2016): 328–34. http://dx.doi.org/10.4028/www.scientific.net/amm.853.328.

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Gasket is an important sealing element of bolted flange connection structure. The nonlinear performance of the gasket material will make the flange angle and gasket compression force change. Therefore, it plays an important role in the tightness of bolted flange connection system. Apart from acknowledgment of this effect, there exists no established design calculation procedure that accounts for tightness. In this paper, the mechanical properties of the gasket at room temperature were studied, it is known that the rebound performance of the gasket is related to the initial preload. And the eff

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Kim, Hyun-Bae, Joo-Saeng Park, Jung-Pyo Hong, Jung-Kwon Oh, and Jun-Jae Lee. "Air Tightness Performance of Residential Timber Frame Buildings." Journal of the Korean Wood Science and Technology 42, no. 2 (2014): 89–100. http://dx.doi.org/10.5658/wood.2014.42.2.89.

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Zhang, Yan, Julien S. Baker, Xuejun Ren, Neng Feng, and Yaodong Gu. "Metatarsal strapping tightness effect to vertical jump performance." Human Movement Science 41 (June 2015): 255–64. http://dx.doi.org/10.1016/j.humov.2015.03.013.

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Zhang, Zhixin, Qiang Guo, and Wei Liu. "Evaluation of Long-Term Tightness of the Coal Pillar Dam of Underground Reservoir and Protection Countermeasures." Energies 15, no. 19 (2022): 7229. http://dx.doi.org/10.3390/en15197229.

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The coal mine underground reservoir is an effective facility for mine groundwater utilization in water-deficient and ecologically fragile areas. Usually, the artificial reserved coal pillar is used as the dam of underground reservoir, and little research has been done on its tightness performance. Comsol software is used to simulate the leakage of underground reservoirs in Shendong area, in the western part of China, and the long-term tightness of coal pillar dam under different operation conditions is evaluated. The results show that: (1) When the underground reservoir is not connected with t

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Cao, Shuanghua, Zhiliang Lou, Leheng Wang, and Minsi Li. "The Research of Building Air Permeability Based on Building Structural Tightness." Advanced Materials Research 594-597 (November 2012): 2142–45. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.2142.

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The building air permeability plays a major role in both building energy performance and indoor air quality. The performance of structural tightness is set as an evaluation index of building air permeability, which is employed to analyze the relationship among building air permeability, building construction and window/door air permeability. Based on some assumptions, the coefficient of building structural tightness is established to summarize the influential factors on building air permeability, and the theory method is provided to improve the building air permeability. A model of air permeab

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Dai, Li, and Yi Zhang. "The Influences of Material and Structure on the UV Protection of Summer Fabrics." Advanced Materials Research 298 (July 2011): 73–77. http://dx.doi.org/10.4028/www.scientific.net/amr.298.73.

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Thin summer fabrics without anti-UV finishing were used as experimental samples and the influences of fabric thickness, tightness, structure and fiber on the anti-UV properties were observed carefully. The measured performance parameters were normalized, to make UV protection properties of different thickness, tightness, fabric structures and fiber materials are comparable. This investigation revealed that the dominant factors affecting fabric anti-ultraviolet property were fabric structure, thickness and fiber type. The anti-UV performance from strong to weak is satin, twill and plain weave i

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Cheatham, Scott W., Kyle R. Stull, Mike Fantigrassi, and Ian Montel. "Hip Musculoskeletal Conditions and Associated Factors That Influence Squat Performance: A Systematic Review." Journal of Sport Rehabilitation 27, no. 3 (2018): 263–73. http://dx.doi.org/10.1123/jsr.2016-0246.

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Context: The squat is a fundamental movement for weightlifting and sports performance. Both unilateral and bilateral squats are also used to assess transitional and dynamic lower-extremity control. Common lower-extremity conditions can have an influence on squat performance. Of interest are the effects of hip musculoskeletal conditions and associated factors, such as hip muscle pain, fatigue, and tightness, on squat performance. Currently, there has been no appraisal of the evidence regarding the association of these conditions and associated factors on squat performance. Objective: This study

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Liu, Long Bin, Pan Pan Mi, Shuai Cao, and Ming Yun Lv. "Ground Simulation Method for Envelope Performance of Airship in near Space." Advanced Materials Research 989-994 (July 2014): 3473–76. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.3473.

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Performing characteristics on envelope composite of near space airship (NSA) are quite different from that of the low altitude airship essentially. The NSA envelope material should meet excellent applicative characteristics including light weight, high strength, anti-aging, anti-ultraviolet radiation, gas-tightness, weather resistance. Ground simulation test is critical for the envelope design and development process of NSA, and the environmental features of near space is analyzed for NSA, then corresponding ground simulation test methods are proposed to involve mechanical strength of the grou

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Dissertations / Theses on the topic "Tightness of Performance"

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Zhao, Xueqian. "Network on Chip : Performance Bound and Tightness." Doctoral thesis, KTH, Elektronik och Inbyggda System, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-166412.

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Featured with good scalability, modularity and large bandwidth, Network-on-Chip (NoC) has been widely applied in manycore Chip Multiprocessor (CMP) and Multiprocessor System-on-Chip (MPSoC) architectures. The provision of guaranteed service emerges as an important NoC design problem due to the application requirements in Quality-of-Service (QoS). Formal analysis of performance bounds plays a critical role in ensuring guaranteed service of NoC by giving insights into how the design parameters impact the network performance. The study in this thesis proposes analysis methods for delay and backlo

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Allard, Ingrid. "Achieving building energy performance : requirements and evaluation methods for residential buildings in Sweden, Norway, and Finland." Licentiate thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-103749.

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Building energy performance has always been important in the cold climate of Sweden, Norway and Finland. To meet the goal that all new buildings should be nearly zero-energy buildings by 2020, set in the EU directive 2010/31/EU [1] on the energy performance of buildings (EPBD recast), the building sector in Europe now faces a transition towards buildings with improved energy performance. In such a transition, a discussion is needed about the objective of the improvement – why, or to what end, the building energy performance should be improved. The objective of improving building energy perform

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Giorgi, Priscila. "AVALIAÇÃO DE DESEMPENHO DE SISTEMA DE VEDAÇÃO VERTICAL DE BLOCO DE SOLO-CIMENTO CONFORME NBR 15575 REFERENTE À HABITABILIDADE E SUSTENTABILIDADE." Universidade Federal de Santa Maria, 2016. http://repositorio.ufsm.br/handle/1/7938.

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The Industrial Revolution generated two parallel phenomena during the twentieth century: increased distribution of wealth and reduced energy costs, causing a large increase in energy consumption. With the international oil crisis in the 1970s, materials used until that time such as concrete, steel and glass, began to be seen as energy-intensive materials. Society began to seek buildings with minimal environmental impact, using materials that generate a smaller amount of energy, waste and pollution and CO2 emissions in the atmosphere and provide greater potential for reincorporation into nature

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Kuo, Po-Hung, and 郭柏宏. "The Effects of Standard Tightness and Compensation Scheme on Job Performance: The Moderating Effect of Risk-aversion and Task Complexity." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/55972333707413246648.

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碩士<br>國立臺灣大學<br>會計學研究所<br>99<br>This study examines (1) the independent and joint effects of standard tightness and compensation scheme on job performance, (2) the role of risk-aversion in the above effects, and (3) whether the effect of risk-aversion on compensation scheme selection is moderated by task complexity. Recruiting 232 undergraduate students as the participants in an experiment in which some participants perform the decoding task (moderate complexity) while the others solve the arithmetic problem (high complexity), this study obtains the following findings. First, for the decoding

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Chao, Chia-Hung, and 趙家鴻. "The Study on the Relationships among the Degree of Tightness of Business Network, the Degree of Internationalization and Performance--from the Viewpoints of the Core Firms." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/73624891683339002660.

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碩士<br>國立東華大學<br>國際企業研究所<br>90<br>Most researchers have been interested in exploring the content of the competitive advantage based on cooperative networks formed by small and medium enterprises（SMEs）in Taiwan. Firms obtain more benefits and advantages by using cooperative networks in competitive and dynamic environment. In addition, the activities of internationalization have become necessary requirements for SMEs to be survived under globalization pressure. Issues related internationalization have been received attention in international business management field. In this study, we attempted

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Saha, Aadirupa. "Battle of Bandits: Online Learning from Subsetwise Preferences and Other Structured Feedback." Thesis, 2020. https://etd.iisc.ac.in/handle/2005/5184.

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The elicitation and aggregation of preferences is often the key to making better decisions. Be it a perfume company wanting to relaunch their 5 most popular fragrances, a movie recommender system trying to rank the most favoured movies, or a pharmaceutical company testing the relative efficacies of a set of drugs, learning from preference feedback is a widely applicable problem to solve. One can model the sequential version of this problem using the classical multiarmed-bandit (MAB) (e.g., Auer, 2002) by representing each decision choice as one bandit-arm, or more appropriately as a Dueling-Ba

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Books on the topic "Tightness of Performance"

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American, Society of Heating Refrigerating and Air-Conditioning Engineers. Air leakage performance for detached single-family residential buildings. ASHRAE, 1988.

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American, Society of Heating Refrigerating and Air-Conditioning Engineers. Air leakage performance for detached single-family residential buildings. ASHRAE, 1994.

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Ober, David G. Attic insulation performance: Full scale tests of conventional insulation and radiant barriers. Mineral Insulation Manufacturers Association, 1990.

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Narila, Karfaid. Emphysema Symptoms: No Symptoms, Coughing, Chest Tightness, Shortness of Breath, Decreased Athletic Performance, Muscle Weakness, Wheezing, Excessive Mucus, Frequent Lung Infections, Blue-Tinged Lips and Fingernail Beds. Independently Published, 2021.

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Tarsia, Paolo. Dyspnoea in the critically ill. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199600830.003.0083.

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Dyspnoea may be defined as a subjective experience of discomfort associated with breathing. Breathing discomfort arises as a result of complex interactions between signals relayed from the upper airways, the chest wall, the lungs, and the central nervous system. Integration of this information with higher brain centres provides further processing. The final aspects of the sensation of dyspnoea are influenced by contextual, environmental, behavioural, and cognitive factors. At least three qualitatively distinct sensations have been employed to describe discomfort in breathing—air hunger, increa

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Book chapters on the topic "Tightness of Performance"

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Ammar, Hanen Ben, Omar Ayadi, and Faouzi Masmoudi. "Effect of Capacity Tightness on Performance of MOPSO Algorithm: Case of Multi-item Capacitated Lot-Sizing Problem." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-24247-3_22.

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Liu, Heng, Weiwen Xu, Hongtao Xu, and Xuemiao Xiang. "Numerical Analysis of Bearing Capacity of Basic Stress Unit Frame of Socket-Type Wheel Buckle Formwork Support Frame Body." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1748-8_12.

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AbstractSocket-and-socket wheel-buckle steel pipe formwork support frame is a new formwork support system, with fixed component specifications and fast erection speed, which can significantly improve the construction efficiency. Its application performance is different from that of fastener-type, bowl-buckle-type and plate-buckle-type, and there are not enough experimental and numerical analysis results to consult. Therefore, based on the bearing capacity test of the basic bearing units of socket-type wheel-buckle steel pipe formwork support, the finite element software ANSYS is used to conduct numerical analysis of 12 groups of basic bearing units, and the influence degree of vertical bearing capacity of different specifications of unit supports is studied by stud spacing and wedge tightness of cross bar plug. It is pointed out that the stiffness of formwork support in the vertical and horizontal directions should not be too different in the construction process.

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Holck, O., and S. Svendsen. "Rain Tightness." In Performance and Durability Assessment. Elsevier, 2004. http://dx.doi.org/10.1016/b978-008044401-7/50020-1.

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Svendsen, S. "TESTING OF RAIN TIGHTNESS AND MECHANICAL PERFORMANCE OF SOLAR COLLECTORS." In Clean and Safe Energy Forever. Elsevier, 1990. http://dx.doi.org/10.1016/b978-0-08-037193-1.50152-x.

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Devkota, P., J. Park, and E. Choi. "Effect of cracks on air-tightness of vacuum tube bridge structures." In Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges. CRC Press, 2018. http://dx.doi.org/10.1201/9781315189390-380.

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Ma, Ruizhe, Azim Ahmadzadeh, Soukaina Filali Boubrahimi, and Rafal A. Angryk. "Segmented Dynamic Time Warping." In Advances in Data Mining and Database Management. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8446-9.ch001.

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Initially used in speech recognition, the dynamic time warping algorithm (DTW) has regained popularity with the widespread use of time series data. While demonstrating good performance, this elastic measure has two significant drawbacks: high computational costs and the possibility of pathological warping paths. Due to the balance between performance and the tightness of restrictions, the effects of many improvement techniques are either limited in effect or use accuracy as a trade-off. In this chapter, the authors discuss segmented-DTW (segDTW) and its applications. The intuition behind significant features is first established. Then considering the variability of different datasets, the relationship between specific global feature selection parameters, feature numbers, and performance are demonstrated. Other than the improvement in computational speed and scalability, another advantage of segDTW is that while it can be a stand-alone heuristic, it can also be easily combined with other DTW improvement methods.

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Guo, Yixiang, Lifang Chen, and Yuhang Zhou. "A Review of the Development of Sealing Materials and Measurement and Control Simulation Technology for Typical Hypersonic Vehicle Positions." In Proceedings of the 2022 International Conference on Smart Manufacturing and Material Processing (SMMP2022). IOS Press, 2022. http://dx.doi.org/10.3233/atde220826.

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Hypersonic vehicles are an important development direction in aerospace, and their development will have a significant impact on world security, the development of cosmic space resources and related disciplines. Along with the rapid development of modern aircraft, landing gear is commonly used with retractable technology, which brings a series of problems, such as the design of landing gear hatch retraction heat sealing mechanism and the evaluation of air tightness. This paper takes the thermal sealing structure of the front main landing gear hatch of a vehicle as an example, reviews the progress of the analysis techniques of sealing material properties and sealing structure design for hypersonic vehicles at home and abroad, discusses the current status of the development and limitations of hatch thermal sealing technology, outlines and discusses the key technologies for design and analysis of hatch thermal sealing structure and the future development trend, and summarizes the test equipment and methods for identifying the performance of seals and sealing systems.

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Conference papers on the topic "Tightness of Performance"

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Li, Xiang, Cheng Yao, and Jiepu Li. "Research on Tightness Performance of Corrugated Gasket Bolted Flanged Connections System." In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63794.

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A finite element calculation and a leakage rate test were carried out in order to investigate the tightness performance of a corrugated gasket bolted flanged connections system. Based on a detailed finite element model of the bolted flange connection, gasket stresses and deformations were determined for room temperature operating conditions. Leakage testes were then performed to acquire leakage data at different gasket compression stresses and different internal pressures. The data was fit to a leakage rate formula. Additional analysis was performed to investigate the influence of temperature.

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Finegan-Dollak, Catherine, Reed Coke, Rui Zhang, Xiangyi Ye, and Dragomir Radev. "Effects of Creativity and Cluster Tightness on Short Text Clustering Performance." In Proceedings of the 54th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers). Association for Computational Linguistics, 2016. http://dx.doi.org/10.18653/v1/p16-1062.

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Zheng, Xing, Koji Sato, Takahiro Fujihara, Yoshiko Akamatsu, and Toshiyuki Sawa. "Effect of Tightening Procedure on the Sealing Performance of Bolted Gasketed Pipe Flange Connections." In ASME 2019 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/pvp2019-93497.

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Abstract The objective of the present paper is to examine the effect of tightening procedure on scatter in axial bolt forces and the bolt forces distribution in bolted gasketed pipe flange connections where spiral-wound gaskets and PTFE blended gaskets are used. The scatter in the axial bolt forces was examined by several tightening procedures which are JIS B 2251, ASME PCC-1 legacy, ASME alternative #1, #2, #3 and 3 rounds method procedures in ASME 24“ bolted gasketed pipe flanged connection. The leak rate of the tightened bolted flanged connections was also measured. Furthermore, the assembl

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Cheta, Ayman M., and Gonghyun Jung. "Comparative Study of Leak-Tightness Performance of Wafer Type and Lug-Wafer Type Valves During a Fire." In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78177.

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Many companies do not allow the use of wafer type valves in flammable and/or toxic services. During a fire, the long bolts expand faster than the valve body, causing the joint to lose tightness and making the fire bigger. However, there is no consensus with regard to wafer-lug type valves. Some companies believe that since the bolts are protected inside the lugs the problem is solved. Others believe than the long bolts will always be a problem. In this paper, the authors used finite element analysis to compare the leak-tightness performance of both types during a fire.

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Kobayashi, Takashi, Koji Sato, Akira Muramatsu, and Toshiyuki Sawa. "Reduction of Fugitive Emissions From Bolted Flanged Connections by Using PTFE Blended Gasket." In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63547.

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Gasket is the key element which determines the tightness of bolted flanged connection. PTFE blended gaskets which have recently been developed and come onto the market have a superior sealing performance as well as the chemical and temperature resistances and can contribute to reduce fugitive emissions. This paper deals with the sealing behaviors of the PTFE blended gasket and the tightness of a bolted flanged connection in which the gasket is used. The gasket is mainly composed of PTFE and graphite and has a high tightness and heat resistance up to 300 degree C. The creep characteristic is im

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Lee, Walter, Abdel-Hakim Bouzid, and James Huang. "Qualification of Gasket Performance for Vacuum Applications." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-26056.

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Gasket performance for vacuum applications has not been well studied. Although a wealth of sealability data has been generated for pressurized systems, little is done with vacuum conditions. A new test method has been developed to study the sealing performance of gaskets for vacuum services. The tests were conducted on a standard ROTT test rig, where a vacuum chamber surrounding the gasket was created by an air pump and monitored by a pressure gauge capable of measuring pressures down to 0.1 Torr. Two levels of vacuum were used: 50 Torr and 3 Torr. Each tested gasket was compressed to various

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Strebkov, S. V., A. P. Slobodyuk, and A. V. Bondarev. "RESTORING THE PERFORMANCE OF ALUMINUM RADIATORS OF THE COOLING SYSTEM." In Innovative technologies in road transport. Voronezh State University of Forestry and Technologies named after G.F. Morozov, Voronezh, Russia, 2021. http://dx.doi.org/10.34220/itrt2021_92-97.

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The article is devoted to the development of a technology for repairing an aluminum radiator of a KAMAZ vehicle. A distinctive feature of the proposed technology is the use of cold gas-dynamic spraying, which ensures the restoration of the tightness of a radiator made of thin-walled aluminum parts and having a complex shape that makes it difficult to perform technological operations.

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Dupre, Ross. "Effects of Stud Galling on Bolted Flange Joint Assembly Performance." In ASME 2020 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/pvp2020-21248.

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Abstract This study will focus on the galling of studs and what impact that has on the overall performance of a Bolted Flange Joint Assembly. Galling or “cold welding” occurs more so with softer metals. While tightening the nut on to the stud the contact metal will “pull” away from itself and the two surfaces will essentially become one. Once this happens the nut cannot be tightened or loosened and often cutting the stud is the only form of removal. We’ll be studying how this affects the performance (tightness) of a bolted flange joint assembly. Does the assembly loosen over time or does it re

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Rice, Dale A., and A. Fitzgerald Waterland. "Review of Mechanical and Sealing Performance Aspects of Commercially Available PTFE Based Gasket Materials." In ASME 2018 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/pvp2018-84082.

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Gaskets incorporating polytetrafluoroethylene (PTFE) are one of the most common in use today where soft sealing material is needed in bolted joints. Over the years, various types of gaskets have been developed including those using skived, expanded, filled, or molded PTFE sheet. Still other PTFE gaskets have been fabricated, incorporating some type of metal insert. Although many of the key benefits (e.g., chemical resistance, application in a broad range of flange types, higher maximum temperature and stress levels than most elastomers, indefinite shelf life, etc.) remain, the performance of t

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Bausman, Anita, Jerry Waterland, and Dan Reid. "New Leakage Requirements for ASME B16.20 and Current Generation Spiral Wound Gaskets." In ASME 2019 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/pvp2019-93928.

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Abstract The ASME B16.20 Metallic Gaskets for Pipe Flanges standard was extensively revised in 2017 [1]. One of the significant changes is the introduction of maximum permissible leakage rate. This marks a landmark introduction of an actual leakage performance criterion into ASME B16.20, a most welcome advance. A common maximum permissible leakage rate of 0.0137 mg/s-m (7.67E−10 lb/s-in) is specified for all sizes and pressure classes of finished spiral wound gaskets, that is, including the windings and any or no gauge rings for that particular gasket. Test conditions are defined — ambient tem

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Reports on the topic "Tightness of Performance"

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Sekki, Pauli, Eero Saleva, and Pekka Laamanen. Study of ventilated low-slope and large span wooden element roofs in the current and future climate. Department of the Built Environment, 2023. http://dx.doi.org/10.54337/aau541620957.

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Finland's building regulations and guidelines rely on ventilation to ensure the hygrothermal performance of structures. For wooden roofs, height of ventilation cavity and area of ventilation openings have been determined depending on roof slope and roof area in guideline. This causes difficulties in practical implementation in low-slope roofs with large span, because the guideline leads to large ventilation openings that can be challenging to be implemented. In practice, roof element suppliers have produced roofs with slightly smaller height of ventilation cavities and areas of ventilation ope

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