Academic literature on the topic 'Adjustable adaptations'
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Journal articles on the topic "Adjustable adaptations"
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Sahinoğlu, Dilek, Gürsoy Coskun, and Nilgün Bek. "Effects of different seating equipment on postural control and upper extremity function in children with cerebral palsy." Prosthetics and Orthotics International 41, no. 1 (July 9, 2016): 85–94. http://dx.doi.org/10.1177/0309364616637490.
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Background:Adaptive seating supports for cerebral palsy are recommended to develop and maintain optimum posture, and functional use of upper extremities.Objectives:To compare the effectiveness of different seating adaptations regarding postural alignment and related functions and to investigate the effects of these seating adaptations on different motor levels.Study design:Prospective study.Methods:A total of 20 children with spastic cerebral palsy (Gross Motor Function Classification System 3–5) were included. Postural control and function (Seated Postural Control Measure, Sitting Assessment Scale) were measured in three different systems: standard chair, adjustable seating system and custom-made orthosis.Results:In results of all participants ungrouped, there was a significant difference in most parameters of both measurement tools in favor of custom-made orthosis and adjustable seating system when compared to standard chair ( p < 0.0017). There was a difference among interventions in most of the Seated Postural Control Measure results in Level 4 when subjects were grouped according to Gross Motor Function Classification System levels. A difference was observed between standard chair and adjustable seating system in foot control, arm control, and total Sitting Assessment Scale scores; and between standard chair and custom-made orthosis in trunk control, arm control, and total Sitting Assessment Scale score in Level 4. There was no difference in adjustable seating system and custom-made orthosis in Sitting Assessment Scale in this group of children ( p < 0.017).Conclusion:Although custom-made orthosis fabrication is time consuming, it is still recommended since it is custom made, easy to use, and low-cost. On the other hand, the adjustable seating system can be modified according to a patient’s height and weight.Clinical relevanceIt was found that Gross Motor Function Classification System Level 4 children benefitted most from the seating support systems. It was presented that standard chair is sufficient in providing postural alignment. Both custom-made orthosis and adjustable seating system have pros and cons and the best solution for each will be dependent on a number of factors.
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Makvandi, Mehdi, Xilin Zhou, Chuancheng Li, and Qinli Deng. "A Field Investigation on Adaptive Thermal Comfort in an Urban Environment Considering Individuals’ Psychological and Physiological Behaviors in a Cold-Winter of Wuhan." Sustainability 13, no. 2 (January 12, 2021): 678. http://dx.doi.org/10.3390/su13020678.
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To date, studies of outdoor thermal comfort (OTC) have focused primarily on physical factors, tending to overlook the relevance of individual adaptation to microclimate parameters through psychological and physiological behaviors. These adaptations can significantly affect the use of urban and outdoor spaces. The study presented here investigated these issues, with a view to aiding sustainable urban development. Measurements of OTC were taken at a university campus and in urban spaces. Simultaneously, a large-scale survey of thermal adaptability was conducted. Two groups were selected for investigation in a cold-winter-and-hot-summer (CWHS) region; respondents came from humid subtropical (Cfa) and hot desert (BWh) climates, according to the Köppen Climate Classification (KCC). Results showed that: (1) neutral physiological equivalent temperature (NPET) and preferred PET for people from the Cfa (PCfa) and BWh (PBWh) groups could be obtained with KCC; (2) PCfa adaptability behaviors were, subjectively, more adjustable than PBWh; (3) Clothing affected neutral temperature (NT), where NT reduced by approximately 0.5 °C when clothing insulation rose 0.1 Clo; and (4) Gender barely affected thermal acceptance vote (TAV) or thermal comfort vote (TCV) and there was a substantial relationship between thermal sensation, NT, and PET. These findings suggest ‘feels like’ temperature and comfort may be adjusted via relationships between microclimate parameters.
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Christie, M. D., S. Sun, L. Deng, H. Du, S. W. Zhang, and W. H. Li. "Real-time adaptive leg-stiffness for roll compensation via magnetorheological control in a legged robot." Smart Materials and Structures 31, no. 4 (February 21, 2022): 045003. http://dx.doi.org/10.1088/1361-665x/ac5317.
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Abstract Over the recent few decades, the evolving research-field of legged robotics has seen various mechanical and control-based developments. Inspired by biological species, a significant adaptation in modern mechanical leg designs has been the implementation of adjustable stiffness, shifting from what were previously simple linkages to more-complex variable stiffness actuators. Physiological studies previously demonstrated leg-stiffness modulation was not only a common trait in multiple biological locomotors, but also played a key role in disturbance recovery for humans. Guided by this, recent robotics research has shown that this can also be applied to legged robots to achieve similar locomotion adaptations, albeit often limited by the tuning time of leg stiffness in such circumstances. This study proposes real-time adaptive stiffness robot legs which are governed by fast-response magnetorheological fluid dampers, enabling stiffness adjustment upon a single step. Through experimental characterisation and model validation, these legs are shown to achieve a maximum stiffness shift of 114%. Enabled by real-time control during locomotion, improved performance and roll-angle stability is experimentally demonstrated for a bipedal robot test platform. Such improvement to locomotion is found through typical legged locomotion scenarios, with the platform encountering: obstacles, valleys, and coronal gradients in a comprehensive series of experiments.
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Uhlmann, E., S. Uhlemann, and J. Kochan. "In-Situ-Kraftmessung bei variablen Werkzeugwinkeln*/In-situ force measurement with variable tool angles – Measurement of process forces directly behind the cutting edge: enabler for optimized milling tools." wt Werkstattstechnik online 109, no. 01-02 (2019): 14–16. http://dx.doi.org/10.37544/1436-4980-2019-01-02-16.
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Werkzeugentwicklungen sind von iterativen Anpassungen und aufwendigen Versuchsreihen mit einer Vielzahl von Prototypen geprägt. In einem Forschungsprojekt wurde ein sensorisch instrumentiertes Fräswerkzeug mit verstellbaren Schneiden entwickelt und mittels SLM (Selective Laser Melting) aufgebaut. Mit dieser Entwicklung liegt ein Instrument vor, das im Fräsprozess unmittelbar an den Schneiden Belastungen erfassen kann und durch nachgestellte FEM (Finite Elemente Methode)-Analysen und Optimierungsroutinen ein enormes Potenzial für die Auslegung optimierter Werkzeuggeometrien bietet. Tool developments are characterized by iterative tool adaptations and complex test series with a large number of prototype tools. As part of a research project, a sensorically instrumented milling tool with adjustable cutting edges was developed and constructed using SLM. This makes an instrument available to detect loads directly at the cutting edges during the milling process, offering enormous potential for the design of optimized tool geometries through simulated FEM analyses and optimization routines.
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Monleon, Daniel, Rebeca Garcia-Valles, Jose Manuel Morales, Thomas Brioche, Gloria Olaso-Gonzalez, Raul Lopez-Grueso, Mari Carmen Gomez-Cabrera, and Jose Viña. "Metabolomic analysis of long-term spontaneous exercise in mice suggests increased lipolysis and altered glucose metabolism when animals are at rest." Journal of Applied Physiology 117, no. 10 (November 15, 2014): 1110–19. http://dx.doi.org/10.1152/japplphysiol.00585.2014.
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Exercise has been associated with several beneficial effects and is one of the major modulators of metabolism. The working muscle produces and releases substances during exercise that mediate the adaptation of the muscle but also improve the metabolic flexibility of the complete organism, leading to adjustable substrate utilization. Metabolomic studies on physical exercise are scarce and most of them have been focused on the effects of intense exercise in professional sportsmen. The aim of our study was to determine plasma metabolomic adaptations in mice after a long-term spontaneous exercise intervention study (18 mo). The metabolic changes induced by long-term spontaneous exercise were sufficient to achieve complete discrimination between groups in the principal component analysis scores plot. We identified plasma indicators of an increase in lipolysis (elevated unsaturated fatty acids and glycerol), a decrease in glucose and insulin plasma levels and in heart glucose consumption (by PET), and altered glucose metabolism (decreased alanine and lactate) in the wheel running group. Collectively these data are compatible with an increase in skeletal muscle insulin sensitivity in the active mice. We also found an increase in amino acids involved in catecholamine synthesis (tyrosine and phenylalanine), in the skeletal muscle pool of creatine phosphate and taurine, and changes in phospholipid metabolism (phosphocholine and choline in lipids) between the sedentary and the active mice. In conclusion, long-term spontaneous wheel running induces significant plasma and tissue (heart) metabolic responses that remain even when the animal is at rest.
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Pinto, Fernando C. Loio, Henrique P. Neiva, and Ricardo Ferraz. "Theoretical Basis of Technical-tactical Behavior and its Application in Ultimate Full Contact Training." Open Sports Sciences Journal 14, no. 1 (March 22, 2021): 9–13. http://dx.doi.org/10.2174/1875399x02114010009.
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Background: Technical-tactical training has been shown to be relevant to performance in a competition. In this regard, several studies have analysed the efficiency of technical-tactical dynamics in combat sports. However, these researchers have mainly focused on technical efficiency, and therefore more research is needed regarding tactical efficiency. Furthermore, to the best of our knowledge, there are no published experiential studies on Ultimate Full Contact. Objective: This brief review will analyse the theoretical basis of technical-tactical behaviour for training application in Ultimate Full Contact, characterising the modality under cognitive and dynamic-ecological approaches. This knowledge can be transferred and applied to similar modalities, such as Pankration, Free Fight, Shooto, and Mixed Martial Arts (MMA). Conclusion: The theoretical technical-tactical knowledge created through competition is essential because it is the only way that improvement in the training process can occur. Ultimate Full Contact is characterised as a combat sport of special complexity and intermitent intensity, where the technical-tactical factors are decisive for the performance while the physical component can be a conditioning factor. A careful regulation between technical-tactical training load and physiological load is essential to obtain adjustable adaptations. Both cognitive and dynamic-ecological approaches should be considered based on the respective training models.
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Frankin, Sivan, Rajib Roychowdhury, Kamal Nashef, Shahal Abbo, David J. Bonfil, and Roi Ben-David. "In-Field Comparative Study of Landraces vs. Modern Wheat Genotypes under a Mediterranean Climate." Plants 10, no. 12 (November 28, 2021): 2612. http://dx.doi.org/10.3390/plants10122612.
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The Near East climate ranges from arid to a Mediterranean, under which local wheat landraces have been grown for over millennia, assumingly accumulating a unique repertoire of genetic adaptations. In the current study, we subjected a subset of the Israeli Palestinian Landraces (IPLR) collection (n = 19: durum and bread wheat landraces, modern wheat cultivars, and landraces mixtures) to full-field evaluation. The multifield experiment included a semiarid site (2018–2019, 2019–2020) under low (L) and high (H) supplementary irrigation, and a Mediterranean site (2019–2020). Water availability had a major impact on crop performance. This was reflected in a strong discrimination between environments for biomass productivity and yield components. Compared to landraces, modern cultivars exhibited significantly higher grain yield (GY) across environments (+102%) reflecting the effect of the Green Revolution. However, under the Gilat19 (L) environment, this productivity gap was significantly reduced (only +39%). Five excelling landraces and the durum mix exhibited good agronomic potential across all trails. This was expressed in relatively high GY (2.3–2.85 t ha−1), early phenology (86–96 days to heading) and lodging resistance. Given the growing interest of stakeholders and consumers, these might be considered future candidates for the local artisanal wheat grain market. Yet, this step should be taken only after establishing an adjustable field management protocol.
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Colhoun, Andrew F., John E. Speich, MaryEllen T. Dolat, Joseph R. Habibi, Georgi Guruli, Paul H. Ratz, Robert W. Barbee, and Adam P. Klausner. "Acute length adaptation and adjustable preload in the human detrusor." Neurourology and Urodynamics 35, no. 7 (July 30, 2015): 792–97. http://dx.doi.org/10.1002/nau.22820.
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Sheng, Shouzhao, Chenwu Sun, and Hong Zhao. "Indirect Adaptive Attitude Control for a Ducted Fan Vertical Takeoff and Landing Microaerial Vehicle." Mathematical Problems in Engineering 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/135489.
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The present paper addresses an attitude tracking control problem of a ducted fan microaerial vehicle. The proposed indirect adaptive controller can greatly reduce tracking error in the initial stage of the adaptive learning process by using an error compensation strategy and can achieve good capability to eliminate the adverse effect of measurement noises on the convergence of adjustable parameters. Moreover, the learning rate adaptation strategy is proposed to further minimize the adverse effect of large learning rates on the convergence of adjustable parameters. The experimental tests have illustrated the effectiveness of the proposed adaptive controller.
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Nakajima, Tateo, and Clemeth L. Abercrombie. "Adjustable acoustics and musician adaptation at the concert hall in Aalborg, Denmark." Psychomusicology: Music, Mind, and Brain 25, no. 3 (2015): 236–39. http://dx.doi.org/10.1037/pmu0000111.
Full textDissertations / Theses on the topic "Adjustable adaptations"
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Бондар, Олег Валентинович. "Технологічне забезпечення якості складання нероз'ємних з'єднань при використанні переналагоджувальних пристосувань в умовах серійного виробництва." Thesis, НТУ "ХПІ", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/37944.
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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.02.08 – технологія машинобудування. Національний технічний університет "Харківський політехнічний інститут", Харків, 2018.
Дисертація присвячена вирішенню науково-технічної задачі забезпечення якості складання виробів, що мають нероз'ємні з'єднання, шляхом розширення технологічних можливостей і підвищення ефективності використання переналагоджуваних універсальних збірно-розбірних пристосувань (УЗРП) в умовах серійного багатономенклатурного виробництва. Проведено аналіз конструкцій, тенденцій розвитку збірних пристосувань та умов їх екс-плуатації для складання нероз'ємних з'єднань. Встановлено основні критерії оцінки працездатності пристосувань і запропоновано способи з’єднання та фіксації елементів УЗРП для забезпечення максимального рівня збирання компоновок. Обґрунтовано умови силової взаємодії елементів нової конструкції. Отримано аналітичний вираз для еквівалентної жорсткості базових плит, визначено основні геометричні параметри елементів і ступінь їх впливу на міцність та жорсткість пристосувань. Проведено експериментальні дослідження напружено-деформованого стану базових плит УЗРП нової конструкції і підтверджено працездатність з'єднань елементів пристосувань. Розроблено методичні та практичні рекомендації щодо визначення раціональних основних конструктивних параметрів елементів УЗРП і компоновок з них для ефективного оснащення серійного багатономенклатурного виробництва. Економічний ефект від упровадження основних положень роботи у виробництво становить 160 тис. грн.Thesis for the degree of candidate of technical sciences, specialty 05.02.08 – manufacturing engineering. National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2018. The dissertation is devoted to the solution of scientific and technical problems to ensure the quality assurance of products by having integral connections, expanding technological possibilities and increasing the efficiency of universal Prefabricated devices (UPFD) in the conditions of serial multi-nomenclature production. The analysis of constructions, tendencies development of prefabricated devices development and conditions of their operation for assembling non-detachable joints is carried out. The basic criteria for estimating the adaptability of devices are established, methods of connection and fixing the elements of the UPFD are offered for ensuring the maximum level of assembly of layouts. The conditions of power interaction of elements of a new construction are substantiated. An analytical expression for equivalent rigidity of base plates was obtained, the basic geometric parameters of elements and their degree of influence on durability and rigidity of adaptations were determined. Experimental investigations of the strain-deformed steel of the UPFD base plates of the new design have been carried out and the efficiency of connecting the elements of devices has been con-firmed. The methodical and practical recommendations for defining the rational basic design parameters of the elements of the UPFD and their layout for an effective equipment of a serial multi-unit production are developed. The economic effect of introducing the main provisions of work in production is 160000 UAH.
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Бондар, Олег Валентинович. "Технологічне забезпечення якості складання нероз'ємних з'єднань при використанні переналагоджувальних пристосувань в умовах серійного виробництва." Thesis, НТУ "ХПІ", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/37889.
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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.02.08 – технологія машинобудування. Національний технічний університет "Харківський політехнічний інститут", Харків, 2018.
Дисертація присвячена вирішенню науково-технічної задачі забезпечення якості складання виробів, що мають нероз'ємні з'єднання, шляхом розширення технологічних можливостей і підвищення ефективності використання переналагоджуваних універсальних збірно-розбірних пристосувань (УЗРП) в умовах серійного багатономенклатурного виробництва. Проведено аналіз конструкцій, тенденцій розвитку збірних пристосувань та умов їх екс-плуатації для складання нероз'ємних з'єднань. Встановлено основні критерії оцінки працездатності пристосувань і запропоновано способи з’єднання та фіксації елементів УЗРП для забезпечення максимального рівня збирання компоновок. Обґрунтовано умови силової взаємодії елементів нової конструкції. Отримано аналітичний вираз для еквівалентної жорсткості базових плит, визначено основні геометричні параметри елементів і ступінь їх впливу на міцність та жорсткість пристосувань. Проведено експериментальні дослідження напружено-деформованого стану базових плит УЗРП нової конструкції і підтверджено працездатність з'єднань елементів пристосувань. Розроблено методичні та практичні рекомендації щодо визначення раціональних основних конструктивних параметрів елементів УЗРП і компоновок з них для ефективного оснащення серійного багатономенклатурного виробництва. Економічний ефект від упровадження основних положень роботи у виробництво становить 160 тис. грн.Thesis for the degree of candidate of technical sciences, specialty 05.02.08 – manufacturing engineering. National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2018. The dissertation is devoted to the solution of scientific and technical problems to ensure the quality assurance of products by having integral connections, expanding technological possibilities and increasing the efficiency of universal Prefabricated devices (UPFD) in the conditions of serial multi-nomenclature production. The analysis of constructions, tendencies development of prefabricated devices development and conditions of their operation for assembling non-detachable joints is carried out. The basic criteria for estimating the adaptability of devices are established, methods of connection and fixing the elements of the UPFD are offered for ensuring the maximum level of assembly of layouts. The conditions of power interaction of elements of a new construction are substantiated. An analytical expression for equivalent rigidity of base plates was obtained, the basic geometric parameters of elements and their degree of influence on durability and rigidity of adaptations were determined. Experimental investigations of the strain-deformed steel of the UPFD base plates of the new design have been carried out and the efficiency of connecting the elements of devices has been con-firmed. The methodical and practical recommendations for defining the rational basic design parameters of the elements of the UPFD and their layout for an effective equipment of a serial multi-unit production are developed. The economic effect of introducing the main provisions of work in production is 160000 UAH.
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Chinatto, Júnior Adilson Walter. "Processamento largamente linear em arranjo de antenas = proposta, avaliação e implementação prática de algoritmos." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259282.
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Orientadores: João Marcos Travassos Romano, Cynthia Cristina Martins JunqueiraDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
Made available in DSpace on 2018-08-17T17:05:38Z (GMT). No. of bitstreams: 1 ChinattoJunior_AdilsonWalter_M.pdf: 7887281 bytes, checksum: 23d4e34e4a2b77a46e1707773d7b5fdf (MD5) Previous issue date: 2011
Resumo: O Processamento Largamente Linear, desenvolvido durante a década de 1990, tem levado a uma melhoria no desempenho de algoritmos adaptativos para determinadas situações que empregam sinais impróprios. Quando aplicado a arranjos de antenas, esse tipo de processamento apresenta a potencialidade ser mais robusto e eficiente que as técnicas clássicas de filtragem. Dessa forma, este trabalho busca estender uma série de algoritmos adaptativos clássicos de conformação de feixe para a forma largamente linear, verificando através de simulações os eventuais ganhos em desempenho obtidos na tarefa de mitigação de interferentes através de arranjos de antenas. São avaliados algoritmos treinados, com restrições e cegos, cobrindo um leque relativamente amplo de cenários de utilização. Visando o uso de arranjos de antenas em cenários em que os sinais incidentes possuam modulação real, são propostas otimizações para os algoritmos largamente lineares que levam a uma redução da complexidade computacional, mantendo o desempenho do algoritmo original. Essas otimizações são aplicadas para algoritmos treinados, com restrições e cegos, sendo seus desempenhos comparados através de simulações com os desempenhos obtidos através dos algoritmos largamente lineares originais e dos algoritmos estritamente lineares. Por fim, uma plataforma para testes de arranjos de antenas é implementada em hardware provido de dispositivo de lógica programável (FPGA), permitindo que sejam realizados ensaios práticos envolvendo caracterização de antenas, conformação de feixe não adaptativa e mitigação de interferentes através de algoritmos adaptativos
Abstract: Widely Linear Processing, developed during the 1990s, has led to an improved performance of adaptive algorithms under certain situations that involve improper signals. When applied to antenna arrays, this type of processing shows to be potentially more robust and efficient than the classical filtering techniques. The objective of this work is to extend several classic adaptive beamforming algorithms to the widely linear form, verifying by means of simulations the potential gains in performance when applied to the task of mitigating interference in antenna arrays. Trained, restricted and blind algorithms are considered, covering a relatively broad range of feasible scenarios. Addressing the use of antenna arrays in scenarios in which the incident signals involved have real modulation, optimizations for the widely linear algorithms are proposed, thereby promoting reductions in the computational complexity, while maintaining the original algorithm performance. These optimizations are applied to trained, restricted and blind algorithms, and their performance is compared through simulations with the performances obtained using the original algorithms in their largely linear and strictly linear versions. Finally, an antenna array test platform is implemented in the hardware, allowing practical tests to be carried out. A set of measures taken with the antenna array test platform is exhibited, which include characterization of antennas, non-adaptive beamforming and interference mitigation using adaptive algorithms
Mestrado
Telecomunicações e Telemática
Mestre em Engenharia Elétrica
Book chapters on the topic "Adjustable adaptations"
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Tertychny-Dauri, Vladimir Yu. "Searchless Self-Adjustable Adaptation and Control Systems." In Adaptive Mechanics, 33–64. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-007-0787-0_2.
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Sieradzki, Alan. "Designed for Darkness: The Unique Physiology and Anatomy of Owls." In Owls - Clever Survivors [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.102397.
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Owls are the only truly nocturnal avian raptors and have evolved several unique adaptations to perfectly fill this role. For example, their unique large tubular eyes, packed with light-sensitive cells, enable owls to operate in almost total darkness, while their remarkable auditory system allows them to operate in complete darkness. This unique and complex auditory system is a combination of specialised feathers forming a parabolic facial disc, adjustable operculum, or flaps and, in some species, asymmetrical ear openings. This unique system allows the owl’s brain to construct an auditory map of space when locating its prey. As remarkable as it seems, this is tantamount to owls being able to hear in 3D. While there are minor variations in the individual physiology between certain species due to the type of prey they take and the habitat they operate in, all owls are subject to the same unique adaptations in eyes, hearing, head rotation, feather structure, digestive system, and hind limb musculature. In this study, we examine each individual adaptation that combines to make the owl a superbly designed nocturnal predator and also look at some shared mechanisms and behaviour patterns that are crucial to its survival.
Conference papers on the topic "Adjustable adaptations"
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Schwartze, Veit, Marco Blumendorf, and Sahin Albayrak. "Adjustable context adaptations for user interfaces at runtime." In the International Conference. New York, New York, USA: ACM Press, 2010. http://dx.doi.org/10.1145/1842993.1843051.
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Lages, Wallace, and Doug Bowman. "Adjustable Adaptation for Spatial Augmented Reality Workspaces." In SUI '19: Symposium on Spatial User Interaction. New York, NY, USA: ACM, 2019. http://dx.doi.org/10.1145/3357251.3358755.
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Moreno, Michael, Saurabh Biswas, Lewis D. Harrison, Guillaume Pernelle, Matthew W. Miller, Theresa W. Fossum, David A. Nelson, and John C. Criscione. "Assessment of Minimally Invasive Device That Provides Simultaneous Adjustable Cardiac Support and Active Synchronous Assist in an Acute Heart Failure Model." In ASME 2011 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2011. http://dx.doi.org/10.1115/sbc2011-53089.
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Congestive heart failure (CHF) is a debilitating disease that is generally initiated by some index cardiac event and ultimately characterized by left ventricular (LV) remodeling which dramatically alters the mechanical environment about the heart. It is well established that mechanical stimuli (e.g., stress or strain) are important epigenetic factors in cardiovascular development, adaptation, and disease.1–3 Interestingly, abnormal cardiac kinematics is often considered a symptom of heart failure when in actuality it is likely a primary contributing factor to the relentless progression of the disease.4 Cellular responses to pathologic mechanical factors lead to further pathologic remodeling and a positive feedback loop emerges such that eventually a threshold is reached wherein the neurohormal compensatory mechanisms activated to maintain homeostasis following the initial cardiac event are no longer sufficient to deter further progression of the disease. Consequently, treatment strategies that fail to remedy the aberrant mechanical environment become increasingly ineffective as the disease progresses.
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Tran, Le-Nguyen, Fadi J. Kurdahi, and Ahmed M. Eltawil. "Adjustable supply voltages and refresh cycle for process variations and temperature changing adaptation in DRAM to minimize power consumption." In 2011 IEEE Workshop on Microelectronics and Electron Devices (WMED). IEEE, 2011. http://dx.doi.org/10.1109/wmed.2011.5767277.
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Tran, Le-Nguyen, Fadi J. Kurdahi, Ahmed M. Eltawil, and Abdullah Aljumah. "Adjustable supply voltages and refresh cycle for process variations, temperature changes, and device degradation adaptation in 1T1C embedded DRAM." In 2011 IEEE 6th International Design and Test Workshop (IDT). IEEE, 2011. http://dx.doi.org/10.1109/idt.2011.6123115.
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Sok, Ratnak, Beini Zhou, and Jin Kusaka. "Numerical Study on the Adaptation of Diesel Wave Breakup Model for Large-Eddy Simulation of Non-Reactive Gasoline Spray." In ASME 2021 Power Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/power2021-64537.
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Abstract Gasoline direct injection (GDI) is a promising solution to increase engine thermal efficiency and reduce exhaust gas emissions. The GDI operation requires an understanding of fuel penetration and droplet size, which can be investigated numerically. In the numerical simulation, primary and secondary breakup phenomena are studied by the Kelvin-Helmholtz/Rayleigh-Taylor (KH-RT) wave breakup models. The models were initially developed for diesel fuel injection, and in the present work, the models are extended to the GDI application combined using large-eddy simulation (LES). The simulation is conducted using the KIVA4 code. Measured data of experimental spray penetration and Mie-scattering image comparisons are carried out under non-reactive conditions at an ambient temperature of 613K and a density of 4.84 kg/m3. The spray penetration and structures using LES are compared with traditional Reynolds-Averaged Navier-Stokes (RANS). Grid size effects in the simulation using LES and RANS models are also investigated to find a reasonable cell size for future reactive gasoline spray/combustion studies. The fuel spray penetration and droplet size are dependent on specific parameters. Parametric studies on the effects of adjustable constants of the KH-RT models, such as time constants, size constants, and breakup length constant, are discussed. Liquid penetrations from the RANS turbulence model are similar to that of the LES turbulence model’s prediction. However, the RANS model is not able to capture the spray structure well.
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Liu, Beibei, Lin Xu, Zhen Zhao, Mohamed A. A. Abdelkareem, Junyi Zou, and Jiaxing Yu. "Modeling and Simulation of a Displacement Controllable Active Suspension System." In ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/detc2018-85741.
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Active suspension can adapt itself to the rigidity and the damping characteristics based on the vehicle dynamic state and the road condition, making the suspension in the best state of shock absorbing, which can increase the handling stability, the ride comfort and the passing ability of vehicles. As for strikingly rugged roads like off-road conditions, the traditional active suspension can hardly balance the contradiction between the wheel adhesion and the vertical accelerated speed of the body. In this paper, an active suspension in which the position of the vehicle body can be adjusted is proposed. In the proposed suspension, a series of electric cylinders are installed, which can actively adjust the position between the vehicle body and the suspension in order to achieve the purpose of controlling the relative body-wheels position. In this manner, AMESim is used to set up three suspension designs which include suspension supporter adaptation equipment with different locations in the system. Through simulation analysis, the paper has explored the feasibility of the vehicle attitude control of the three suspension designs under off-road conditions. The results proved that the active suspension system with adjustable body position can restrain the body roll or pitch efficiently in which this technology can be applied to the body attitude control when ORVs are at high speed.
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Harne, R. L., Z. Wu, and K. W. Wang. "Mechanical Properties Adaptivity by the Design and Exploitation of Metastable States in a Modular Metastructure." In ASME 2015 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/smasis2015-9018.
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Recent studies on periodic metamaterial systems have shown that remarkable properties adaptivity and multifunctionality are often products of exploiting internal, coexisting metastable states. Yet to realize such attractive potential, effecting coexisting metastable states in material systems may require the determination of a periodic constituent which promotes a non-uniqueness when composed within the whole system, thus creating a need for costly, multiscale design. To surmount such concerns, this research first focuses on the development of adaptable, metastable modules: once assembled into modular metastructures, synergistic properties adaptation is found to be a natural byproduct of the strategic module design. Using this approach, it is seen that modularity facilitates a direct pathway to create and effectively exploit metastable states for massive, metastructure properties adaptivity, including a near-continuous variation of mechanical properties or stable topologies and adjustable hysteresis. A model is developed to understand the source of the synergistic characteristics, and theoretical findings are found to be in good agreement with experimental results. Important design-based questions are raised regarding the modular metastructure concept, and a genetic algorithm routine is developed to elucidate the sensitivities of the properties variation with respect to the statistics among assembled module design variables. To obtain target multifunctionality and adaptivity, the routine discovers that particular degrees and types of modular heterogeneity are required. Future realizations of modular metastructures are discussed to illustrate the extensibility of the design concept and broad application base.