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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 (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 (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 (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. &nbsp; 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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Fitrianto, Taufik Ramadhan, Galih Prakoso, Alfani Risman Nugroho, Anshah Silmi Afifah, Siska Anggiriani, and Retno Widiastuti. "Evaluation of Office Chairs to Enhance Comfort and Reduce Musculoskeletal Risk in Sedentary Work Environments." Jurnal SENOPATI : Sustainability, Ergonomics, Optimization, and Application of Industrial Engineering 6, no. 2 (2025): 114–21. https://doi.org/10.31284/j.senopati.2025.v6i2.6750.
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This study evaluates the effectiveness of an ergonomically redesigned office chair, tailored to meet the anthropometric needs of employees. It addresses common issues associated with prolonged sitting, such as musculoskeletal discomfort and fatigue, which are prevalent in sedentary work environments. Utilizing anthropometric data from prior studies, the redesign incorporates modifications in key chair dimensions—such as seat height, seat depth, and backrest height—to enhance user comfort and reduce physical strain. The ROSA (Rapid Office Strain Assessment) tool was employed to assess posture and ergonomic risk for both the old and redesigned chairs. Findings indicate a significant improvement in ergonomic support and comfort with the new design, supported by a statistically significant reduction in ROSA scores, as confirmed through a paired sample t-test. Although the redesign effectively enhances comfort, further improvements are recommended, including adjustable lumbar support and backrest flexibility. This study underscores the importance of ergonomic adaptations in office furniture to support diverse body types and reduce occupational health risks.
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Monleon, Daniel, Rebeca Garcia-Valles, Jose Manuel Morales, et al. "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 (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 (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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Emamialeagha, Helia, Ahad Nazari, Ali Shafaat, and Shayan Shalchian. "Automated scheduling method for reducing spatial-temporal conflict safety risks, using ML and BIM." Journal of Information Technology in Construction 30 (June 12, 2025): 903–23. https://doi.org/10.36680/j.itcon.2025.037.
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Construction sites face inherent risks from overlapping activities in confined spaces and require advanced solutions to manage spatial-temporal conflicts. Surpassing previously developed static BIM tools, this study introduces an automated approach that revolutionizes job site safety planning by dynamically assessing conflict risks between evolving workspaces. The method integrates empirical workspace geometry with machine learning—using Support Vector Machine regression to predict worker presence—and BIM-driven dynamic conflict analysis, which reflects real-time changes in workspace sizes and team movements. By generating safety score matrices through pairwise risk assessments, it quantifies conflict types (physical impacts, proximity risks, workflow disruptions) and enables real-time scenario comparisons via Python-based evaluation. Adjustable parameters allow customization for team sizes, workspace allocations, and pandemic-specific adaptations such as social distancing. Case studies show that the system effectively identifies high-risk periods, compares different work sequences, and makes schedules without sacrificing productivity. Unlike earlier clash detection methods that only compared static models, this framework provides actionable safety metrics to proactively respond to conflict risks. Designed for scalability, the presented method manages computational demands in complex projects. This advancement represents a paradigm shift in construction safety, blending predictive analytics with practical adaptability to protect workers and streamline operations.
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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 (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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Ismiranti, Athifa Sri, Akhmadi Akhmadi, Arini Arumsari, Mahendra Nur Hadiansyah, Alfito Aji Denandra, and Sarah Nurul Azizah. "Method design of interactive digital devices to support the workspace comfort." International Journal of Visual and Performing Arts 5, no. 2 (2023): 120–33. http://dx.doi.org/10.31763/viperarts.v5i2.1083.
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There are many alterations and adaptations of the workspaces after the Covid-19 pandemic. Nowadays, workspaces are required to have flexibility in facilitating physical and virtual activities, work-from-home (WFH), and work-from-office (WFO) activities. Besides, workspaces must provide comfort based on user preferences and demand to support workers’ health and productivity. In order to answer these problems, the design of interactive digital devices that can be adjusted according to physical needs, activities, and preferences is needed to support the ideal workspace comfort. The research method used in this research is a literature review related to ideal workspace comfort standards and an assessment of the Arduino as an interactive digital device to produce an interactive digital device method design that can detect ideal comfort and be applied to workspaces. The result shows that as an interactive digital device, Arduino can be implemented in a workspace to detect and produce ideal workspace comfort regarding lighting, noise, temperature, and humidity. Arduino also supports flexibility and varied demand in a workspace because of its adjustable artificial intelligence feature. The ideal standard of workspace differs based on the activities and geographical conditions of the country and is related to the varied preferences of its users. Based on its complexity, for further research to be carried out, it is recommended to conduct a case study of ideal workspace interior design with an Arduino device in a specific place to generate more accurate data and suitable workspace design.
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Setiawan, Rachman. "PARAMETRIC ANALYSIS ON OFF-SHORE DREDGING PROCESS USING CUTTER SUCTION DREDGERS." ASEAN Engineering Journal 6, no. 1 (2015): 37–46. http://dx.doi.org/10.11113/aej.v6.15477.
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Nowadays, cutter-suction dredgers are widely used in off-shore tin mining around South East Asia region, especially in Indonesia. So far, the effectiveness of the dredging process is arguably due to the skills and experience of individuals who operate the dredgers. No sufficient guidelines, standard operating procedures exist on how to operate the dredgers effectively based on scientific facts and factual data on the mining environment. This paper discusses the effectiveness of the dredging process in a cutter suction dredger (CSD). The influence of various parameters is studied through parametric simulation based on theoretical approach developed by Miedema and Vastbloom, with a number of adaptations from the original model in order to obtain a better approximation. A specific CSD design is used as a case study. From the parametric analysis, it is found that, dredging capacity is highly affected by the cutting thickness and swing speed, rather than the dredging depth. With the limit of pump capacity and dredge power, the optimum cutting thickness is approximately 75% for the dredger in question, adjustable through the swing speed during operation. Moreover, the dredging forces are highly affected by the cutter rotational speed and soil type, whilst lightly affected by the dredging depth. For dredging harder soils, the dredge forces increase by up to 68%, for the dredger in question, hence the operational parameters must be adjusted, i.e. by lowering the swing speed, however maintaining higher rotational speed, in order to have a safe and optimum operation.
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Colhoun, Andrew F., John E. Speich, MaryEllen T. Dolat, et al. "Acute length adaptation and adjustable preload in the human detrusor." Neurourology and Urodynamics 35, no. 7 (2015): 792–97. http://dx.doi.org/10.1002/nau.22820.
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L.A., Koldar. "Features of regenerants' of Cercis siliquastrum L. adaptation to ex vitro conditions." Plant Introduction 44 (December 1, 2009): 65–67. https://doi.org/10.5281/zenodo.2555387.
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Last stage of microclonal propagation – adaptation of <em>Cercis siliquastrum</em> L. regenerants to <em>ex vitro</em> conditions is investigated. Adjustable conditions and careful care are basic conditions of their successful acclimatization.
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Maimurynova, A. A., M. A. Beisenbi, and A. Temirbek. "Reference model of adaptive control system for unstable and deterministic chaotic processes in the catastrophe class hyperbolic umbilica." Bulletin of the National Engineering Academy of the Republic of Kazakhstan 95, no. 1 (2025): 137–45. https://doi.org/10.47533/2025.1606-146x.11.
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A method is proposed for solving the problem of synthesis of a self-organizing adaptive control system for unstable and deterministic chaotic processes in the catastrophe class hyperbolic umbilic for objects with m-inputs and n-outputs. The problem of synthesizing a self-organizing adaptive control system is solved by the velocity- gradient method of the Lyapunov vector function. From the boundary conditions of the aperiodic robust stability of the main contour and the generalized adjustable object, adjustable coefficients are calculated and the control goal is achieved. An urgent problem in the conditions of uncertainty of the parameters of the control object and external influences, for the control of unstable and deterministic chaotic processes, is the use of adaptation methods. At the same time, a self-organizing reference model with the desired dynamics is constructed in the class of catastrophes – a hyperbolic umbilic of a self-organizing system. But the aperiodic robust stability of a self-organizing reference model is studied using the Lyapunov vector function method. Collection of information about an object during operation, processing and its use to develop control impacts can improve the quality of management.A method is proposed for solving the problem of synthesizing the adaptation loop of a self-organizing control system for unstable and deterministic chaotic processes in the class of catastrophes “hyperbolic umbilic”. From the conditions of aperiodic robust stability of a generalized adjustable object, adjustable coefficients are calculated and the control goal is achieved.
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Paupério, J. M., F. S. Martins, M. J. Peixoto, and M. Mota. "Bariatric surgery as a risk factor for alcohol use disorder: a clinical case and literature review." European Psychiatry 66, S1 (2023): S380—S381. http://dx.doi.org/10.1192/j.eurpsy.2023.824.
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IntroductionBariatric surgery is a relatively safe surgical procedure with high success rates. The improvement on patient’s self-esteem and overall quality of life are expected benefits that extend beyond physical health. Nonetheless, current literature describes a higher risk of developing alcohol use disorder (AUD) in patients undergoing bariatric surgery that is not better explained by differences in baseline characteristics such as socioeconomic factors. This reinforces the need to optimize mental health professionals’ intervention in these patients.ObjectivesReport a clinical case and conduct a literature review on the etiology of the increased risk of alcohol use disorder in patients after bariatric surgery.MethodsDescription of a clinical case and a non-systematic review of literature on the PubMed database, selecting articles published in the last decade and their included reference lists, combining the following MESH terms: “bariatric surgery” and “abuse, alcohol”.ResultsThe clinical case presented is a 45 years old woman, with a college degree, that was diagnosed with AUD in 2020, 6 years after being submitted to bariatric surgery. She didn’t have any alcohol-related problems before the procedure but she describes the death of her mother in 2020 as the trigger for her current heavy drinking habits. Injuries induced by alcohol intoxication have since then caused multiple visits to the emergency room and she has now a reported cognitive impairment that severely compromises her ability for self-care. The association between AUD and bariatric surgery, as presented in the reported clinical case, is well established in current literature. The switch of patient’s coping mechanisms from eating to drinking, surgical-induced alcohol pharmacokinetics changes or adaptations of neuroendocrine mechanisms (such as ghrelin and it’s impact on the mesolimbic dopamine system) that contribute to the augmentation of brain reward signaling are all factors that could play a role in the increased reinforcing value of alcohol in these patients. Psychosocial factors were also identified as variables that could impact alcohol-misuse post-operatively. Furthermore, data suggests differences between surgical procedures: while both Roux-en-Y-Gastric Bypass (RYGB) and Sleeve Gastrectomy (SG) dramatically impact alcohol pharmacokinetics, Laparoscopic Adjustable Gastric Banding (LAGB) does not.ConclusionsThere is a strong possibility that the patient’s drinking habits started as a coping mechanism, but her surgery may have also contributed to her AUD. Our review found multiple biopsychosocial factors that could explain the link between bariatric surgery and AUD and some predictors for its development, but future research is needed to fully elucidate its complexities. Nonetheless, health professionals must be well informed for thetimely prevention, diagnosis and treatment of eventual AUD in these patients.Disclosure of InterestNone Declared
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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.
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Zhivitsky, A. Yu, and O. I. Borisov. "Adaptive Control of Multichannel Nonlinear Systems with Unaccounted Dynamics Under Disturbances." Journal of Instrument Engineering 68, no. 4 (2025): 303–9. https://doi.org/10.17586/0021-3454-2025-68-4-303-309.
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The problem of adaptive control of multichannel nonlinear systems with unaccounted input dynamics under parametrically uncertain disturbances is considered. It is shown how the approach based on a “post-processing” adjustable internal model can be used to provide compensation for harmonic external disturbances. The adaptation algorithm is synthesized based on the stability analysis of the closed system using Lyapunov functions.
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Abd Samat, Ahmad Asri, Dahaman Ishak, Shahid Iqbal, and Aimi Idzwan Tajudin. "Comparison between Takagi Sugeno FIS and PI Controller: An Adaptation Scheme of MRAS for Speed Sensorless Control of PMSM." Applied Mechanics and Materials 785 (August 2015): 193–97. http://dx.doi.org/10.4028/www.scientific.net/amm.785.193.
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— This paper proposes modification of an adaptation scheme which aims to replace the conventional PI controller for MRAS by using Fuzzy Logic Control (FLC). This FLC based on Takagi-Sugeno Fuzzy Logic Inference System (FIS). To achieve this goal, field oriented control (FOC) method has been utilized to control the speed of PMSM with the implementation of MRAS to observe the rotor position and speed of the motor. PMSM becomes the reference model for MRAS while the current model in the rotor reference frame is set as the adjustable model. The Takagi Sugeno Fuzzy FIS is executed in the MRAS adaptive scheme in order to tune the errors between the reference and adjustable model. The effectiveness of the Takagi Sugeno FIS to tune the errors in MRAS scheme is compared with the conventional PI controller. The proposed method clearly indicates improved motor performance over a wide range of operating speeds since is capable of tracking the motor speed effectively.
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Yin, Wenfeng, Xiuzhu Yang, Lei Li, et al. "Self-adjustable domain adaptation in personalized ECG monitoring integrated with IR-UWB radar." Biomedical Signal Processing and Control 47 (January 2019): 75–87. http://dx.doi.org/10.1016/j.bspc.2018.08.002.
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Catma, MF, İF Adıgüzel, and SY Yildiz. "Radiographic Changes and Clinical Outcomes Associated with Two Different Press-Fit Humeral Stems in Primary Reverse Shoulder Arthroplasty." Nigerian Journal of Clinical Practice 27, no. 11 (2024): 1252–59. https://doi.org/10.4103/njcp.njcp_179_24.
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Background: Reverse shoulder arthroplasty (RSA) is used commonly for a wide range of indications. The complications after the total shoulder replacements have been reported to be related with the prosthesis design. The type of the humeral stem is a consideration to reduce complication. Radiographic changes are seen at a high rate with new-generation press-fit stems. Aim: This study aims to reduce proximal humeral bone loss after RSA could have been achieved with adjustable humeral stem when compared with monoblock stem. Methods: A retrospective analysis was made of 52 patients treated with RSA using a press-fit humeral stem prosthesis. The patients were separated into two groups according to the type of humeral stem. The first group included 26 patients (18 females, 8 males) who underwent RSA using adjustable humeral stem. The second group included of 26 patients (17 females, 9 males) for whom monoblock humeral stem was used. Clinical and radiological evaluations were made based on the information obtained at 1, 3, 6, 12, and 18 months postoperatively. The follow-up duration was at least 18 months. Results: There was no statistical difference between the adjustable and monoblock groups in respect to gender, age, height, and weight. According to the functional measurements at the final follow-up, no statistically significant difference was determined between the groups with respect to the Constant, UCLA, Oxford, DASH, and VAS values. In terms of radiographic changes, both groups were seen to have been similarly affected. It was found that, irrespective of the stem type used, the humeral side radiographic adaptation was found to be high, which negatively affected the functional results (P < 0.05). Conclusion: The increased radiographic stress shielding adaptation leading to humeral osteolysis was found to have a negative effect on the functional results with the press-fit technique irrespective of stem design.
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Zhang, Zhongjin, Zhitai Liu, Weiyang Lin, and Wei Cheng. "Adaptive Disturbance Rejection Motion Control of Direct-Drive Systems with Adjustable Damping Ratio Based on Zeta-Backstepping." Biomimetics 9, no. 12 (2024): 780. https://doi.org/10.3390/biomimetics9120780.
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Direct-drive servo systems are extensively applied in biomimetic robotics and other bionic applications, but their performance is susceptible to uncertainties and disturbances. This paper proposes an adaptive disturbance rejection Zeta-backstepping control scheme with adjustable damping ratios to enhance system robustness and precision. An iron-core permanent magnet linear synchronous motor (PMLSM) was employed as the experimental platform for the development of a dynamic model that incorporates compensation for friction and cogging forces. To address model parameter uncertainties, an indirect parameter adaptation strategy based on a recursive least squares algorithm was introduced. It updates parameters based on the system state instead of output error, ensuring robust parameter convergence. An integral sliding mode observer (ISMO) was constructed to estimate and compensate for residual uncertainties, achieving finite-time state estimation. The proposed Zeta-backstepping controller enables adjustable damping ratios through parameterized control laws, offering flexibility in achieving desired dynamic performance. System stability and bounded tracking performance were validated via a second-order Lyapunov function analysis. Experimental results on a real PMLSM platform demonstrated that, while achieving adjustable damping ratio dynamic characteristics, there is a significant improvement in tracking accuracy and disturbance suppression. This underscores the scheme’s potential for advancing precision control in biomimetic robotics and other direct-drive system applications.
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Su, Chenhan, Zhe Zhang, Di Zhu, and Ran Tao. "Enhancing the Operating Efficiency of Mixed-Flow Pumps Through Adjustable Guide Vanes." Water 17, no. 3 (2025): 423. https://doi.org/10.3390/w17030423.
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The guide vane mixed-flow pump is a crucial component in medium-to-low-head pumping stations. The guide vanes are mostly fixed in traditional designs. The efficiency of these pumps under off-design operating conditions tends to be low, leading to higher energy consumption. This study explores the design of an adjustable guide vane for the conventional guide vane of a mixed-flow pump at a certain pumping station. Through numerical simulations and two sets of three-factor, five-level orthogonal experiments, we investigate the impact of flow rate, guide vane angle, and impeller angle on efficiency. Through numerical simulation, we identify the optimal relationships between an impeller angle of ±2° and 0° and guide vane angles of ±6°, ±3°, and 0°, focusing on the entropy production rate (EPR) as a key performance metric. The results demonstrate that adjustable guide vanes significantly improve the performance of mixed-flow pumps under off-design conditions. Efficiency increases by up to 17.71% at high flow rates, and by up to 5.48% at low flow rates. Energy consumption is notably reduced. As the flow rate and impeller blade angle vary, the adjustable guide vane rotates to match with the impeller, enhancing flow adaptation, expanding the high-efficiency operating range, and reducing overall energy consumption.
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BENAICHA, SAMIRA. "ROBUST SENSORLESS SPEED CONTROL OF AN INDUCTION MOTOR DRIVE USING A SYNERGETIC APPROACH." REVUE ROUMAINE DES SCIENCES TECHNIQUES — SÉRIE ÉLECTROTECHNIQUE ET ÉNERGÉTIQUE 68, no. 4 (2023): 381–87. http://dx.doi.org/10.59277/rrst-ee.2023.4.10.
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This paper uses a model reference adaptive system (MRAS) to build an improved sensorless rotor-field oriented control (RFOC) induction motor (IM) drive in all speed ranges. However, in the presence of external disturbances and parameter variations, the linear tuning method of the Proportional Integrator (PI) controller in the MRAS adaptation mechanism degrades motor performance. An advanced MRAS-based synergetic technique is proposed to develop two suitable adaptation mechanisms that generate slip speed and stator resistance estimates. The reference and adjustable models are developed in the synchronous rotation coordinate system (d-q frame). The effectiveness of the proposed control algorithm was evaluated under various operating conditions using a specific sensorless IM benchmark and the MATLAB/Simulink software environment.
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Swarnkar, P., S. Jain, and R. K. Nema. "Effect of Adaptation Gain in Model Reference Adaptive Controlled Second Order System." Engineering, Technology & Applied Science Research 1, no. 3 (2011): 70–75. http://dx.doi.org/10.48084/etasr.11.
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Adaptive control involves modifying the control law used by the controller to cope with the fact that the parameters of the system being controlled change drastically due to change in environmental conditions or in system itself. This technique is based on the fundamental characteristic of adaptation of living organism. The adaptive control process is one that continuously and automatically measures the dynamic behavior of plant, compares it with the desired output and uses the difference to vary adjustable system parameters or to generate an actuating signal in such a way so that optimal performance can be maintained regardless of system changes. Nature of adaptation mechanism for controlling the system performance is greatly affected by the value of adaptation gain. It is observed that for the lower order system wide range of adaptation gain can be used to study the performance of the system. As the order of the system increases the applicable range of adaptation gain becomes narrow. This paper deals with application of model reference adaptive control scheme to second order system with different values of adaptation gain. The rule which is used for this application is MIT rule. Simulation is done in MATLAB and simulink and the results are compared for varying adaptation mechanism due to variation in adaptation gain.
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Swarnkar, P., S. Jain, and R. K. Nema. "Effect of Adaptation Gain in Model Reference Adaptive Controlled Second Order System." Engineering, Technology & Applied Science Research 1, no. 3 (2011): 70–75. https://doi.org/10.5281/zenodo.14026.
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Adaptive control involves modifying the control law used by the controller to cope with the fact that the parameters of the system being controlled change drastically due to change in environmental conditions or in system itself. This technique is based on the fundamental characteristic of adaptation of living organism. The adaptive control process is one that continuously and automatically measures the dynamic behavior of plant, compares it with the desired output and uses the difference to vary adjustable system parameters or to generate an actuating signal in such a way so that optimal performance can be maintained regardless of system changes. Nature of adaptation mechanism for controlling the system performance is greatly affected by the value of adaptation gain. It is observed that for the lower order system wide range of adaptation gain can be used to study the performance of the system. As the order of the system increases the applicable range of adaptation gain becomes narrow. This paper deals with application of model reference adaptive control scheme to second order system with different values of adaptation gain. The rule which is used for this application is MIT rule. Simulation is done in MATLAB and simulink and the results are compared for varying adaptation mechanism due to variation in adaptation gain.
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Blatnický, Miroslav, Vladimír Samaš, and Ján Dižo. "Súčasný stav prevodoviek s nastaviteľným prevodovým pomerom pri elektrickom pohone." Technológ 16, no. 4 (2024): 27–31. https://doi.org/10.26552/tech.c.2024.4.4.
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The scope of this article covers potential technologies for transmission mechanisms with variable gear ratios that can be applied to electric traction. A transmission with an adjustable gear ratio allows for the adaptation of the gear ratio according to usage conditions. By adjusting the gear ratio and consequently the traction forces, we can enhance driving parameters, e.g. improved both efficiency and range. The paper theoretically examines various transmissions with variable gear ratios and compares their parameters in the context of electric drives.
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Hajji, Soufien, Ramzi Ben Chehida, Hichem Zayani, Noomen Bouaziz, and Youssef Agrebi Zorgani. "Sensorless Induction Motor Drive Based on Model Reference Adaptive System Scheme Utilising a Fictitious Resistance." Power Electronics and Drives 5, no. 1 (2020): 199–213. http://dx.doi.org/10.2478/pead-2020-0015.
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Abstract This article presents a new development of an indirect stator flux-oriented controller for sensorless speed induction motor drive utilising instantaneous and steady-state values, respectively, of a fictitious resistance symbolised as R_f. The dimension of the fictitious quantity, in this context, is the ohm, which is the difference between the stator d- and q-axis fictitious resistances. However, from the measurement of the stator voltage and currents of the machine, two independent resistance estimators are built. Therefore, the first is considered as a reference model of the induction machine (IM), and the second is considered as an adjustable model. Subsequently, the error between the states of the two models is used to drive a suitable adaptation mechanism that generates the estimation of the speed, for the adjustable model. Furthermore, the structure of the proposed estimator is free from stator resistance and eliminates the requirement of any flux computation. All the detailed simulation study is carried out in MATLAB/Simulink to validate the proposed method and to highlight the robustness and the stability of the proposed model reference adaptive system estimator.
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Glushchenko, A., and K. Lastochkin. "Approximation-Based Approach to Adaptive Control of Linear Time-Varying Systems." Automation and Remote Control 85, no. 5 (2024): 512–31. http://dx.doi.org/10.31857/s0005117924050054.
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An adaptive state-feedback control system is proposed for a class of linear timevarying systems represented in the controller canonical form. The adaptation problem is reduced to the one of Taylor series-based first approximations of the ideal controller parameters. The exponential convergence of identification and tracking errors of such an approximation to an arbitrarily small and adjustable neighbourhood of the equilibrium point is ensured if the condition of the regressor persistent excitation with a sufficiently small time period is satisfied. The obtained theoretical results are validated via numerical experiments.
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Fan, Yongqing, Keyi Xing, and Xiangkui Jiang. "Fuzzy Adaptation Algorithms’ Control for Robot Manipulators with Uncertainty Modelling Errors." Complexity 2018 (2018): 1–8. http://dx.doi.org/10.1155/2018/5468090.
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A novel fuzzy control scheme with adaptation algorithms is developed for robot manipulators’ system. At the beginning, one adjustable parameter is introduced in the fuzzy logic system, the robot manipulators system with uncertain nonlinear terms as the master device and a reference model dynamic system as the slave robot system. To overcome the limitations such as online learning computation burden and logic structure in conventional fuzzy logic systems, a parameter should be used in fuzzy logic system, which composes fuzzy logic system with updated parameter laws, and can be formed for a new fashioned adaptation algorithms controller. The error closed-loop dynamical system can be stabilized based on Lyapunov analysis, the number of online learning computation burdens can be reduced greatly, and the different kinds of fuzzy logic systems with fuzzy rules or without any fuzzy rules are also suited. Finally, effectiveness of the proposed approach has been shown in simulation example.
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Wenhui, Fu, and Boon Keat Ooi. "An Overview of Children's Room Interior Design." International Journal of Social Science and Human Research 07, no. 08 (2024): 6285–91. https://doi.org/10.5281/zenodo.13709584.
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The paper analyses the state of children's room interior design today from the viewpoints of furniture and space, outlining the issues in both areas as well as the c oncept of children's room interior design and the variables influencing it. The study focuses on how interior design can be sustainable, how to create conditions that are conducive to children's developmen t, and how children's needs for indoor spaces vary as they become older. By elaborating on the concepts of space and furniture related contents, this paper amimed to discuss the connection between spatial design concepts for children's growth and the functional sustainable adaptation characteristics requir ed for furniture. The realistic needs of children's room illustrating the influence and importance of interior design on the targeted approaches. In terms of space, it mainly solves the problems of “security” and “comfortability”. For furniture, the issue s of “growth (adjustable and adaptable)”,“modularity” and “detachable” are mainly addressed. The study concludes with recommendations and outlook for the future development of children's room interior design in China. It provides assistance for children's healthy growth and practical guidance for green design.
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Novikov, I. A., A. G. Shevtsova, A. A. Kravchenko, and A. G. Burlutskaia. "Development of a procedure for adapting a model of adjustable intersection." Russian Automobile and Highway Industry Journal 17, no. 6 (2020): 726–35. http://dx.doi.org/10.26518/2071-7296-2020-17-6-726-735.
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Introduction. The article is devoted to the development of an algorithm for checking the assessment of the adequate operation of the transport model and the application of this algorithm in practice.The research has been carried out at a regulated intersection in Belgorod, the main parameters necessary for creating a transport model have been determined. A transport model of the investigated intersection was created, an assessment of the adequate operation of the model was made, measures were proposed to increase the capacity of the investigated section of the road network.Methods and materials. The main attention is paid to the use of the software that allows simulating transport processes at the initial stages of activities related to the organization or reorganization of road traffic. Simulation is a fast, convenient and cost-effective way to assess the effectiveness of traffic management. The modeling process helps to select the most optimal solution for the transport infrastructure.Results. The authors have developed the algorithm for checking the adaptation of the controlled crossing model in the Aimsun software environment, and proposed a new coordination plan for crossing. Conclusion. It is concluded that it is necessary to use the software products intended for modeling transport systems.
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Novikov, I. A., A. G. Shevtsova, A. A. Kravchenko, and A. G. Burlutskaia. "Development of a procedure for adapting a model of adjustable intersection." Russian Automobile and Highway Industry Journal 17, no. 6 (2020): 726–35. http://dx.doi.org/10.26518/2071-7296-2020-17-6-726-735.
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Introduction. The article is devoted to the development of an algorithm for checking the assessment of the adequate operation of the transport model and the application of this algorithm in practice.The research has been carried out at a regulated intersection in Belgorod, the main parameters necessary for creating a transport model have been determined. A transport model of the investigated intersection was created, an assessment of the adequate operation of the model was made, measures were proposed to increase the capacity of the investigated section of the road network.Methods and materials. The main attention is paid to the use of the software that allows simulating transport processes at the initial stages of activities related to the organization or reorganization of road traffic. Simulation is a fast, convenient and cost-effective way to assess the effectiveness of traffic management. The modeling process helps to select the most optimal solution for the transport infrastructure.Results. The authors have developed the algorithm for checking the adaptation of the controlled crossing model in the Aimsun software environment, and proposed a new coordination plan for crossing. Conclusion. It is concluded that it is necessary to use the software products intended for modeling transport systems.
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Murti, Nindita Kresna, Atiek Suprapti, and Agung Budi Sardjono. "TRANSFORMASI ADAPTASI BANGUNAN DI PERMUKIMAN INFORMAL TEPI SUNGAI KAHAYAN." Jurnal Arsitektur ARCADE 4, no. 1 (2020): 57. http://dx.doi.org/10.31848/arcade.v4i1.339.
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Abstract: Many informal settlements in Indonesia have been unable to survive, this is due to changes that occur in the neighborhood. This change resulted in the not surviving of informal settlements, but this did not affect the informal settlements in the city of Palangkaraya, settlements on the banks of the Kahayan river were even more developed, and began to develop towards the mainland.As climate change and the global environment increase, there is a tendency for people to conceptualize adaptation in residential buildings as a process of survival and how adaptation is practiced by people who face the negative impacts of climate change, for example in informal settlements on the Kahayan river bank, where residents adapt to building their homes to be able to withstand environmental changes. Where the neighborhood is located there are tides of the river, as well as other environmental factorsThis study is to find out how the Kahayan River settlement communities can survive, with changes that occur in the environment by analyzing using 6 strategies in building adaptation, namely: Adjustable, Versatile, Refitable, Convertible, Scalable, and Movable (Robert Schmid, 2009). Adaptation that occurs in these settlements, namely on building houses that follow climate change, times, and the environment.Keyword: Informal Settlements, Kahayan River Edge, Adaptation, Transformation.Abstrak: Permukiman Informal di Indonesia banyak yang sudah tidak dapat bertahan, hal ini di karenakan adanya perubahan yang terjadi di lingkungan permukiman tersebut. Perubahan ini berakibat tidak bertahannya permukiman informal, namun hal ini tidak mempengaruhi permukiman informal di Kota Palangkaraya, permukiman yang berada di tepi sungai kahayan ini malah semakin berkembang, dan mulai berkembang menuju ke daratan.Seiring dengan meningkatnya perubahan iklim dan lingkungan global, ada kecenderungan masyarakat untuk membuat konsep adaptasi pada bangunan rumah tinggal sebagai proses untuk bertahan dan bagaimana adaptasi dipraktikkan oleh orang-orang yang menghadapi dampak negatif perubahan iklim, sebagai contoh pada permukiman informal yang berada di tepi sungai Kahayan, di mana warga beradaptasi pada bangunan rumah mereka untuk dapat bertahan terhadap perubahan lingkungan. Di mana lingkungan permukiman ini terdapat pasang surut air sungai, serta faktor lingkungan lainnya.Penelitian ini untuk mengetahui cara masyarakat permukiman tepi Sungai Kahayan dapat bertahan, dengan perubahan yang terjadi di lingkungan dengan menganalisa menggunakan 6 strategi dalam adaptasi bangunan, yaitu: Adjustable, Versatile, Refitable, Convertible, Scalable, dan Movable (Robert Schmid, 2009). Adaptasi yang terjadi pada permukiman ini, yaitu pada bangunan rumah yang mengikuti perubahan iklim, jaman, dan lingkungan.Kata Kunci: Permukiman Informal, Tepi Sungai Kahayan, Adaptasi, Transformasi.
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Schell, Thomas, та Stefan Wegenkittl. "Looking Beyond Selection Probabilities: Adaptation of the χ2 Measure for the Performance Analysis of Selection Methods in GAs". Evolutionary Computation 9, № 2 (2001): 243–56. http://dx.doi.org/10.1162/106365601750190424.
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Viewing the selection process in a genetic algorithm as a two-step procedure consisting of the assignment of selection probabilities and the sampling according to this distribution, we employ the χ2 measure as a tool for the analysis of the stochastic properties of the sampling. We are thereby able to compare different selection schemes even in the case that their probability distributions coincide. Introducing a new sampling algorithm with adjustable accuracy and employing two-level test designs enables us to further reveal the intrinsic correlation structures of well-known sampling algorithms. Our methods apply well to integral methods like tournament selection and can be automated.
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Natalia, Dita Ayu Rani, and M. Sani Roychansyah. "STRATEGI ADAPTASI BANGUNAN DI PERUMNAS CONDONG CATUR SLEMAN DAERAH ISTIMEWA YOGYAKARTA." NALARs 16, no. 2 (2017): 125. http://dx.doi.org/10.24853/nalars.16.2.125-134.
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ABSTRAKBangunan merupakan benda yang bergerak dinamis dan akan mengalami perubahan dalam kurun waktu tertentu. Perubahan bangunan yang dilakukan untuk dapat digunakan secara maksimal disebut dengan adaptasi bangunan. Adaptasi bangunan adalah “pekerjaan pada bangunan untuk pemeliharaan dalam mengubah kapasitas, fungsi dan performance dengan kata lain melakukan intervensi untuk menyesuaikan, menggunakan ulang dan meningkatkan kemampuan bangunan”. Cara yang dapat digunakan oleh penghuni atau pemilik ketika bangunan sudah tidak lagi bekerja secara optimal adalah dengan membiarkan, melakukan perubahan atau menghancurkannya. Hal tersebut dilakukan dengan beberapa strategi yang digunakan dalam adaptasi bangunan. Tujuan penelitian yaitu mengidentifikasi strategi adaptasi bangunan yang digunakan dan terjadi di Perumnas Condongcatur. Metode penelitian yang digunakan dalam penelitian ini adalah deduktif kualitatif dengan teknik pengambilan sampel menggunakan purposive sampling yang bertujuan untuk mengumpulkan data secara spesifik. Pengumpulan data dilakukan dengan melakukan observasi yang terdiri dari pengamatan, kuisioner, interview dan dokumentasi. Data yang telah terkumpul kemudian di analisa berdasarkan perubahan fisik bangunan yang kemudian di diskusikan dengan teori dalam diskusi temuan.Hasil penelitian yang telah dilakukan bahwa terdapat enam strategi adaptasi bangunan di Perumnas Condongcatur. Strategi tersebut antara lain perubahan perabotan (adjustable), perubahan tatanan ruang (versatile), perubahan performance (refitable), perubahan fungsi (convertible), perubahan ukuran (scalable) dan perubahan tatanan layout perabotan. Kata kunci: Strategi, Adaptasi Bangunan, Perumnas ABSTRACTBuilding is a dynamic object and keeps changing in particular period of time. Any change in order to take maximum advantage of the building is called building adaptation. Building adaptation is “any work to a building over and above maintenance to change its capacity, function, or performance’ in other words, ‘any intervention to adjust, reuse, or upgrade a building.” When a building does not function as it is supposed to be, the owner can abandon, change, or destroy it. These are carried out by employing several strategies of building adaptation. This research is aimed to identify strategy of building adaptation used and occurred in Perumnas Condong Catur. Deductive qualitative research method was employed in this research with the samples were taken applying purposive sampling technique which was aimed to specify the collecting of the data. Data collecting was conducted by observation including observation, questionnaires, interview, and documentation. The collected data were analyzed according physical changes of the houses and the analysis were then discussed in the research finding using the theory. The results of the research show that there are six strategies in the building adaptation of Perumnas Condongcatur. They are change of the furniture (adjustable), change of the layout (versatile), change of the performance (refitable), change of the function (convertible), change of the size (scalable), and change of the furniture layout. Keywords: Strategy, Building Adaptation, Perumnas
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Chen, Peng, Yunfeng Zhang, Jianhong Wang, et al. "Adaptive Internal Model Control Based on Parameter Adaptation." Electronics 11, no. 23 (2022): 3842. http://dx.doi.org/10.3390/electronics11233842.
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In actual industrial control, many objects have the characteristics of large lag and time-varying parameters, which makes it difficult for traditional PID control to obtain satisfactory control effects. Therefore, engineers need a control algorithm with a better control effect and a simple structure, and thus the internal model control is introduced into industrial process control. Internal model control has received a lot of attention in the control field because of its excellent control effect, and in ideal conditions, it can perfectly suppress external disturbances, and the output strictly tracks the input. On the basis of the internal model control, a two-degrees-of-freedom internal model control was developed. Compared with the conventional feedback control, the internal model control structure mainly embeds an internal model consistent with the control object in the control object, so the deviation between the internal model and the control object determines the quality of the control effect. In this paper, the internal model is changed to an adjustable parameter model, and the model parameters are adjusted in real time using the parameter adaptive algorithm, so that the model output error is as small as possible, or even zero. In order to solve the influence of interference on the system, compensation based on MRAC theory is used. In order to verify the feasibility of the algorithm, it was applied to the landing process control of fixed-wing Unmanned aerial vehicle) UAV and achieved satisfactory results.
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Niţu, Eduard, Alexandru Babă, Monica Iordache, Aurel Costea, and Doina Iacomi. "Mathematical Model and Algorithm to Optimize the Construction of Adjustable Multi-Axis Heads." Applied Mechanics and Materials 371 (August 2013): 617–21. http://dx.doi.org/10.4028/www.scientific.net/amm.371.617.
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Current trends in the field of manufacturing systems are mostly connected to the transfer of technical solutions specific to large manufacturing series toward small and medium manufacturing series. Our researches presented in this paper study thoroughly and expand the concept of modularization of multi-tool processing devices in order to obtain a high level of productivity and flexibility of the technological system, as well as a significant decrease of the adaptation costs. To this end, we elaborated and used computing methods, mathematical models, optimizing algorithms and original constructive solutions to develop new modular structures meant to optimize the construction and configuration of adjustable multi-spindle ends. We obtained the highest level of modularization for this type of equipment which integrates from the point of view of organs and is functional from the point of view of performance, highly efficient, in a flexible complex multi-tool system of simultaneous-successive and multi-directional processing.
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Niu, Hongjie, Ling Liu, Dongsong Jin, and Siyuan Liu. "High-Tracking-Precision Sensorless Control of PMSM System Based on Fractional Order Model Reference Adaptation." Fractal and Fractional 7, no. 1 (2022): 21. http://dx.doi.org/10.3390/fractalfract7010021.
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In order to solve parameter fluctuations and disturbances, a novel fractional order model reference adaptive speed observer that estimates the rotor position and the angular velocity from the stator currents is proposed for sensorless control of permanent-magnet synchronous motors (PMSM). Firstly, a novel fractional order model reference adaptive controller (FOMRAC) for adaptive identification is designed to achieve fast response and high precise identification of load torque in the full speed range when the motor is running at variable-speed or variable-load. Additionally, an appropriate adjustable matrix P is chosen to make the convergence of the adaptive law meet the requirements. Next, an improved model reference adaptive observer (MRAO) is proposed to suppress the serious chattering and compensate rotor position error, which can stabilize the system. The validity of the proposed fractional order model reference adaptive sensorless control strategy for PMSM is demonstrated with simulations.
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Komari, S. Omid, Adam P. Klausner, Paul H. Ratz, and John E. Speich. "A model for the roles of actin and myosin in adjustable preload tension and acute length adaptation." International Journal of Computational Biology and Drug Design 16, no. 1 (2024): 71–92. http://dx.doi.org/10.1504/ijcbdd.2024.139406.
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Kumra, Neha, L. M. Saha, and M. K. Das. "Asymptotic Stability Analysis Applied in Two and Three-Dimensional Discrete Systems to Control Chaos." International Journal of Mathematical, Engineering and Management Sciences 6, no. 2 (2021): 677–87. http://dx.doi.org/10.33889/ijmems.2021.6.2.042.
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Asymptotic stability analysis applied to stabilize unstable fixed points and to control chaotic motions in two and three-dimensional discrete dynamical systems. A new set of parameter values obtained which stabilizes an unstable fixed point and control the chaotic evolution to regularity. The output of the considered model and that of the adjustable system continuously compared by a typical feedback and the difference used by the adaptation mechanism to modify the parameters. Suitable numerical simulation which are used thoroughly discussed and parameter values are adjusted. The findings are significant and interesting. This strategy has some advantages over many other chaos control methods in discrete systems but, however it can be applied within some limitations.
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Hauck, Nico, Fritz Buser, and Ardeshir Mahdavi. "Visual Impairment, Adaptation Luminance, and Glare: An Empirical Investigation." Applied Mechanics and Materials 887 (January 2019): 527–35. http://dx.doi.org/10.4028/www.scientific.net/amm.887.527.
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Visually impaired people primarily rely on their remaining vision. Unfavorable lighting conditions can further hamper this remaining vision. In this context, the present contribution mainly focuses on the evaluation of the visual performance of visually impaired and normally sighted individuals under different lighting conditions. To investigate the visual performance empirically, we developed a test involving different adaptation luminance values. A monitor with adjustable brightness facilitated various tests to determine the visual performance as a function of the adaptation luminance and glare. In addition, the subjective impressions of the visually impaired participants were captured via interviews. The study included 98 visually impaired people and 38 people without eye-related ailments. The interview results suggest that most people with visual disabilities require special lighting conditions. An increased lighting requirement is observed amongst 50% of this group. Moreover, 75% of this group display increased glare sensitivity. Likewise, adaptation problems and critical issues related to non-uniform lighting are manifest. Visually impaired individuals display significant in the visual performance variance at different brightness levels. Individuals with eye disease display a greatly reduced contrast threshold and a higher subjective level of discomfort compared to individuals with normal vision. Most visually impaired individuals require a higher degree of brightness to achieve their maximum personal visual performance. About a quarter of these individuals achieves the optimal visual performance at lower brightness, while displaying an increased sensitivity to glare. In general, glare has a decisive influence on the visual performance of visually impaired people. For general lighting purposes, a predominantly indirect lighting source better accommodates these individuals' requirements.
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Isdianto, Fadhil Achmadi. "Architectural Adaptation Strategies in “Rumah Tinggal Sederhana Sehat” Type 54." IOP Conference Series: Earth and Environmental Science 1488, no. 1 (2025): 012050. https://doi.org/10.1088/1755-1315/1488/1/012050.
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Abstract This research explores the relevance of architectural adaptation strategies in the renovation planning of type 54 houses, a common small housing model in rapidly urbanizing countries like Indonesia, which often face spatial constraints and evolving resident needs. The study identifies and classifies specific problems related to space utilization and proposes adaptable solutions to enhance functionality and comfort. A qualitative approach was employed, combining qualitative interview with residents and site observations, alongside 3D modeling to visualize adaptation potential. Key strategies examined include adjustable and versatile approaches, which facilitate significant changes in space without major structural modifications, allowing for flexible reconfiguration according to the residents’ requirements. The refitable strategy is highlighted for its role in improving the overall quality of the living environment through the upgrading of outdated components and materials. In contrast, the convertible and scalable strategies, while effective, require more substantial investment in terms of resources and structural alterations. The findings demonstrate that architectural adaptation strategies provide the flexibility and scalability necessary for type 54 houses to continuously meet the needs of residents, ensuring optimal space quality over time. This study contributes to the discourse on sustainable urban housing by offering practical solutions that align with the Sustainable Development Goals (SDGs) 11 on creating inclusive, safe, and resilient living spaces. The findings provide new insight into affordable housing renovation, highlighting the potential for small-scale adaptability to improve long-term sustainability and quality of life.
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Nugroho, Dinan Nafindro, Kusumaningdyah N. H., and Hardiyati. "Spatial and Behavioural-based Adaptation Strategies of Residents Affected by the Rearrangement of Kampung METAL RW 01 Mojo towards Three Dwellings." IOP Conference Series: Earth and Environmental Science 1361, no. 1 (2024): 012040. http://dx.doi.org/10.1088/1755-1315/1361/1/012040.
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Abstract The case of urban settlement with high poverty rates is a problem in various lower-middle countries that has yet to be resolved. The city’s inability to absorb the flow of urbanization resulted in the emergence of spontaneous settlements. To solve this problem, the KOTAKU (City Without Slums) program was launched which has been implemented since 2015. The city of Surakarta has determined the locations for urban settlements with high poverty rates with a total area of 359.53 hectares, in which there is the Semanggi Area which has an area of 76.03 hectares, so it is included in the handling priority list. To support the kampung planning program, a solution was devised for temporary housing or transitional housing for affected residents of Kampung METAL (Near Embankment) RW 01 Mojo arrangement with the planning and construction of the Sub-Komunal RISHA Semanggi housing. During this process, there is a process of spatial adaptation and habitual behaviour based on their occupation. Humans have always tried to maximize the function of buildings, which is why many ways of adaptation have been known. This research will provide an overview of the forms of adaptation processes and strategies for low-income communities affected by settlement arrangements. This study uses an interpretive paradigm. The research strategy used is qualitative and takes respondents with purposive sampling. The aspects studied in this research are the room program (building plans) in Kampung METAL RW 01 Mojo in 2018 compared to 2022, as well as the room program in the Sub-Komunal RISHA Semanggi housing which is complemented by testimonials of living experiences. Adaptation strategies that affected Kampung METAL RW 01 Mojo residents commonly use are adjustable, versatile, refitable and convertible. There are two forms of adaptation carried out by the affected residents: adaptation by adjustment and adaptation by reaction.
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Karyono, Karyono, Badr Abdullah, Alison Cotgrave, and Ana Bras. "A Novel Adaptive Lighting System Which Considers Behavioral Adaptation Aspects for Visually Impaired People." Buildings 10, no. 9 (2020): 168. http://dx.doi.org/10.3390/buildings10090168.
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The number of visually impaired people and elderly people groups are significant, but the current lighting system used in buildings, which is based on the current standard, cannot provide the necessary lighting comfort for them. The lighting system should provide the correct illuminance for every activity and even pattern of light. This research presents the work in progress in developing the novel adaptive lighting system tailored for visually impaired people, which becomes the solution to the problem. The behavioral adaptation aspects and the experience and memory principle are taken into account in the system design. It also makes use of the latest independent adjustable artificial light (LED) technology, to get an even pattern of lighting, while still considering efficient energy usage. The proposed system structure uses a wireless sensor network (WSN), big data processing, and the Artificial Intelligence (AI) sub-system, which can predict and adaptively regulate the illumination level based on the occupant’s needs and routines. The initial simulation of the lighting model is presented in this paper. The simulation uses five scenarios in different seasons and daylight. The simulation shows satisfactory results for illuminance values 200, 250, 300, 500, and 750 lux, needed by the occupants.
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Clomburg, James M., Anna M. Crumbley, and Ramon Gonzalez. "Industrial biomanufacturing: The future of chemical production." Science 355, no. 6320 (2017): aag0804. http://dx.doi.org/10.1126/science.aag0804.
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The current model for industrial chemical manufacturing employs large-scale megafacilities that benefit from economies of unit scale. However, this strategy faces environmental, geographical, political, and economic challenges associated with energy and manufacturing demands. We review how exploiting biological processes for manufacturing (i.e., industrial biomanufacturing) addresses these concerns while also supporting and benefiting from economies of unit number. Key to this approach is the inherent small scale and capital efficiency of bioprocesses and the ability of engineered biocatalysts to produce designer products at high carbon and energy efficiency with adjustable output, at high selectivity, and under mild process conditions. The biological conversion of single-carbon compounds represents a test bed to establish this paradigm, enabling rapid, mobile, and widespread deployment, access to remote and distributed resources, and adaptation to new and changing markets.
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Bu, Xian-De, Shi-Dong Liu, Meng Hou, Chuan Liu, and Xi Zhang. "A Novel Self-Adaptation Approach for Multi-Domain Communication Considering Heterogenerous Power Service in Data Centers." Electronics 13, no. 12 (2024): 2334. http://dx.doi.org/10.3390/electronics13122334.
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With the rapid development of cloud computing, artificial intelligence, etc., data centers have become a flexible load due to their adjustable capabilities and are able to take on power service. However, the existing communication architecture is monolithic and poorly adapted between services and communications, which poses a challenge for data centers to participate in power service. Firstly, this article constructs a multi-domain communication architecture for data center management systems that includes local and remote communication, and analyzes the key technologies supporting this architecture. Secondly, based on differentiated service types and communication requirements, an evaluation system for the adaptability between service and communication technology was constructed, and a communication mode adaptation method based on fuzzy analytic hierarchy process (FAHP)-improved CRITIC combined weighting model and grey Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) was proposed to achieve the analysis of the adaptability between differentiated service and multi-domain communication technology. According to the analysis of examples, the architecture and adaptation algorithm proposed in this article provide an effective theoretical basis and solution for the selection of multi-domain communication technologies for data center management system service.
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Speich, John E., Atheer M. Almasri, Hersch Bhatia, Adam P. Klausner, and Paul H. Ratz. "Adaptation of the length-active tension relationship in rabbit detrusor." American Journal of Physiology-Renal Physiology 297, no. 4 (2009): F1119—F1128. http://dx.doi.org/10.1152/ajprenal.00298.2009.
Full textAbstract:
Studies have shown that the length-tension ( L-T) relationships in airway and vascular smooth muscles are dynamic and can adapt to length changes over a period of time. Our prior studies have shown that the passive L-T relationship in rabbit detrusor smooth muscle (DSM) is also dynamic and that DSM exhibits adjustable passive stiffness (APS) characterized by a passive L-T curve that can shift along the length axis as a function of strain history and activation history. The present study demonstrates that the active L-T curve for DSM is also dynamic and that the peak active tension produced at a particular muscle length is a function of both strain and activation history. More specifically, this study reveals that the active L-T relationship, or curve, does not have a unique peak tension value with a single ascending and descending limb, but instead reveals that multiple ascending and descending limbs can be exhibited in the same DSM strip. This study also demonstrates that for DSM strips not stretched far enough to reveal a descending limb, the peak active tension produced by a maximal KCl-induced contraction at a short, passively slack muscle length of 3 mm was reduced by 58.6 ± 4.1% ( n = 1 5) following stretches to and contractions at threefold the original muscle length, 9 mm. Moreover, five subsequent contractions at the short muscle length displayed increasingly greater tension; active tension produced by the sixth contraction was 91.5 ± 9.1% of that produced by the prestretch contraction at that length. Together, these findings indicate for the first time that DSM exhibits length adaptation, similar to vascular and airway smooth muscles. In addition, our findings demonstrate that preconditioning, APS and adaptation of the active L-T curve can each impact the maximum total tension observed at a particular DSM length.
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Köse, E., A. Sauer, B. Thomas, T. Müller, S. Kölle, and P. Schwanzer. "Stromoptimierte KWK in der Galvanikbranche*/Power-optimized combined heat and power in the electroplating industry - Responding to increasing energy flexibility by residual energy adapted combined heat and power plants." wt Werkstattstechnik online 108, no. 07-08 (2018): 561–66. http://dx.doi.org/10.37544/1436-4980-2018-07-08-79.
Full textAbstract:
Das Thema Energieflexibilität und Anpassung der eigenerzeugten Energie an die Energieerzeugung aus regenerativen Energien gewinnt an Bedeutung. Regulierbare Eigenerzeugungsanlagen können zur Stabilisierung des Netzes einen enormen Beitrag leisten. Der Aufsatz zeigt, welchen Effekt der Einsatz von BHWK auf die Galvanikbranche hat und wie nicht nur die eigenen Energiekosten reduziert, sondern auch die Möglichkeit geschaffen wird, auf Signale der Energiewirtschaft zu reagieren, ohne die Energieversorgung zu unterbrechen. &nbsp; Energy flexibility and adaptation of self-generated energy to energy production from renewable energies is becoming more important. Adjustable distributed power plants can provide a huge impact on stabilizing the power grid. This article displays the effects of combined heat and power generation on the electroplating industry. It demonstrates how to reduce energy costs and also how to find ways to react to signals of the energy industry without interrupting the energy supply.
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Mahalakshmi, G., D. Maladhi, G. Manochitra, T. Bhavatharini, and T. Nandhakumar. "Intelligent Speed Controller for Four Phase Switched Reluctance Motor." International Journal of Engineering & Technology 7, no. 4.19 (2018): 139–43. http://dx.doi.org/10.14419/ijet.v7i4.19.22036.
Full textAbstract:
This paper examines the performance of Fuzzy logic controller with conventional PI controller speed control of four phase Switched Reluctance motor. Switched Reluctance motor has acquired attentiveness in Adjustable speed drive .Because of its less manufacturing and operating cost, fault tolerant capacity ,and high efficiency ,this motor is gains considerable attention. SRM is anyway somewhat hard to control, due to its nonlinear attributes. The dynamic execution anticipated from a variable speed drive incorporates least torque swell, low consistent state blunder, diminished speed overshoot, adaptation to non-critical failure and lessened speed wavering. Rather than linearizing the plant for particular working condition and afterward outlining a direct controller, a straightforward drive framework has been created. The controlled framework incorporates an inward current loop and external speed loop. Winding current and turn on ,turn off angles are utilized as control factors.  Â