Journal articles: 'Time isolation'

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Swartz, Sally. "Time, Space, Isolation." Psychoanalytic Dialogues 30, no. 4 (July 3, 2020): 535–36. http://dx.doi.org/10.1080/10481885.2020.1774346.

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Barghouthi, Sameer A. "First time isolation of Pseudomonas argentinensis from human skin infection." Journal of Microbiology and Infectious Diseases 4, no. 2 (June 1, 2014): 78–83. http://dx.doi.org/10.5799/ahinjs.02.2014.02.0133.

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Li, Donghai, Shougen Zhao, Yujin He, and Tao Li. "Study on the Performance of a Quasi-Zero-Stiffness Isolator with Time Delay Control." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 36, no. 6 (December 2018): 1168–75. http://dx.doi.org/10.1051/jnwpu/20183661168.

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A quasi-zero-stiffness vibration isolation consists of a pair of oblique springs and a vertical spring, aiming at widening the vibration isolation region, is studied in this paper. The time delay linear displacement feedback control strategy is introduced to improve the performance of the isolator. The characteristics of dynamical response under harmonically forcing excitation is obtained by using averaging method. The force transmissibility of the control isolator is presented in this paper. The influence of the time delay linear displacement control on the force transmissibility is studied theoretically. The results show that the performance of the vibration isolation with time-delay control is better than the equivalent linear isolator in either low or high frequency region and the performance of controlled system is better than uncontrolled system.

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Wu, Fengchuan, Yuejun Zheng, Fang Yuan, and Yunqi Fu. "Magnetic-Free Isolators Based on Time-Varying Transmission Lines." Electronics 8, no. 6 (June 17, 2019): 684. http://dx.doi.org/10.3390/electronics8060684.

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Two magnetic-free reconfigurable isolators based on a doubly balanced gyrator (DBG) are designed in this paper. One of the isolators is a single-ended transmission isolator (STI), which uses two matching resistors to absorb the signal transmitted in the reverse direction. In theory, it has infinite isolation bandwidth, which is verified by simulation and an experiment. The other isolator is a differential transmission isolator (DTI) to improve the anti-interference performance, which consists of four Wilkinson power splitters (combiners) and two reciprocal transmission line segments. The DTI uses two pairs of differential signals to prevent the reverse signal. Compared to the STI, the DTI has higher power capacity. Furthermore, when the phases of the control signals acting on the switches are changed, the isolation directions of the two isolators will be changed, to obtain the reconfigurable property.

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Fujita, Takafumi. "Seismic Isolation Systems and Time." Journal of the Society of Mechanical Engineers 96, no. 890 (1993): 77–78. http://dx.doi.org/10.1299/jsmemag.96.890_77.

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Sanchez, Oscar D., Gabriel Martinez-Soltero, Jesus G. Alvarez, and Alma Y. Alanis. "Real-Time Neural Classifiers for Sensor and Actuator Faults in Three-Phase Induction Motors." Machines 10, no. 12 (December 10, 2022): 1198. http://dx.doi.org/10.3390/machines10121198.

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The main steps involved in a fault-tolerant control (FTC) scheme are the detection of failures, isolation and reconfiguration of control. Fault detection and isolation (FDI) is a topic of interest due to its importance for the controller, since it provides the necessary information to adjust and mitigate the effects of the fault. Generally, the most common failures occur in the actuator or in sensors, so this article proposes a novel model-free scheme for the detection and isolation of sensor and actuator faults of induction motors (IM). The proposed methodology performs the task of detecting and isolating faults over data streams just after the occurrence of the failure of an induction motor (IM), by the occurrence of either disconnection, degradation, failure, or connection damage. Our approach proposes deep neural networks that do not need a nominal model or generate residuals for fault detection, which makes it a useful tool. In addition, the fault-isolation approach is carried out by classifiers that differentiate characteristics independently of the other classifiers. The long short-term memory (LSTM) neural network, bidirectional LSTM, multilayer perceptron and convolutional neural network are used for this task. The proposed sensors’ and actuator’s fault detection and isolation scheme is simple. It can be applied to various problems involving fault detection and isolation schemes. The results show that deep neural networks are a powerful and versatile tool for fault detection and isolation over data streams.

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Rezaei, Sima, and Gholamreza Ghodrati Amiri. "Effect of Supplemental Damping on the Seismic Performance of Triple Pendulum Bearing Isolators under Near-Fault Ground Motions ." Applied Mechanics and Materials 845 (July 2016): 240–45. http://dx.doi.org/10.4028/www.scientific.net/amm.845.240.

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The isolating system absorbs part of the earthquake energy before transferring it to the structure, by shifting the natural period of the isolated structure. This period shift results in a reduction in the inertial forces. It is clear that the effects of near-fault (NF) ground motions with large velocity pulses can bring the seismic isolation devices to critical working conditions. In this study, two three-dimensional RC buildings with the heights of 9.0m and 21.0m which are supported by Triple Friction Pendulum Bearing (TFPB) isolators are idealized. Various TFPB configurations are selected for isolation systems. There are also viscous dampers to limit the excess deformation of isolators. Nonlinear time history analyses were performed by using OpenSees to study the influence of supplemental dampers on structural responses such as isolator displacements and maximum drifts under ten near-fault ground motion records. The results show noticeable reduction in isolator displacement when using dampers. However, maximum drift rises considerablely. Moreover by increasing the period range or reducing the damping ratio of isolation system, maximum driftreduces but the displacement of isolator increases.

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Birch, Marion, and Leo van Bergen. "A time for solidarity, not isolation." Medicine, Conflict and Survival 36, no. 2 (April 2, 2020): 123–25. http://dx.doi.org/10.1080/13623699.2020.1779969.

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Roberts, Katherine, Perminder Khosa, Susan Singh, Crystal Son, Janet Eagan, and Kent Sepkowitz. "Time to Isolation-Every Minute Counts." American Journal of Infection Control 39, no. 5 (June 2011): E88—E89. http://dx.doi.org/10.1016/j.ajic.2011.04.162.

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Bartneck, Matthias, Klaudia Theresa Warzecha, Carmen Gabriele Tag, Sibille Sauer-Lehnen, Felix Heymann, Christian Trautwein, Ralf Weiskirchen, and Frank Tacke. "Isolation and Time Lapse Microscopy of Highly Pure Hepatic Stellate Cells." Analytical Cellular Pathology 2015 (2015): 1–13. http://dx.doi.org/10.1155/2015/417023.

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Hepatic stellate cells (HSC) are the main effector cells for liver fibrosis. We aimed at optimizing HSC isolation by an additional step of fluorescence-activated cell sorting (FACS) via a UV laser. HSC were isolated from livers of healthy mice and animals subjected to experimental fibrosis. HSC isolation by iohexol- (Nycodenz) based density centrifugation was compared to a method with subsequent FACS-based sorting. We assessed cellular purity, viability, morphology, and functional properties like proliferation, migration, activation marker, and collagen expression. FACS-augmented isolation resulted in a significantly increased purity of stellate cells (>99%) compared to iohexol-based density centrifugation (60–95%), primarily by excluding doublets of HSC and Kupffer cells (KC). Importantly, this method is also applicable to young animals and mice with liver fibrosis. Viability, migratory properties, and HSC transdifferentiationin vitrowere preserved upon FACS-based isolation, as assessed using time lapse microscopy. During maturation of HSC in culture, we did not observe HSC cell division using time lapse microscopy. Strikingly, FACS-isolated, differentiated HSC showed very limited molecular and functional responses to LPS stimulation. In conclusion, isolating HSC from mouse liver by additional FACS significantly increases cell purity by removing contaminations from other cell populations especially KC, without affecting HSC viability, migration, or differentiation.

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Wang, Yong, Shunming Li, Chun Cheng, and Xingxing Jiang. "Dynamic Analysis of a High-Static-Low-Dynamic-Stiffness Vibration Isolator with Time-Delayed Feedback Control." Shock and Vibration 2015 (2015): 1–19. http://dx.doi.org/10.1155/2015/712851.

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This paper proposes the time-delayed cubic velocity feedback control strategy to improve the isolation performance of High-Static-Low-Dynamic-Stiffness (HSLDS) vibration isolator. Firstly, the primary resonance of the controlled HSLDS vibration isolator is obtained by using multiple scales method. The equivalent damping ratio and equivalent resonance frequency are defined to study the effects of feedback gain and time delay on the primary resonance. The jump phenomenon analysis of the controlled system without and with time delay is investigated by using Sylvester resultant method and optimization method, respectively. The stability analysis of the controlled system is also considered. Then, the 1/3 subharmonic resonance of the controlled system is studied by using multiple scales method. The effects of feedback gain and time delay on the 1/3 subharmonic resonance are also presented. Finally, force transmissibility is proposed to evaluate the performance of the controlled system and compared with an equivalent linear passive vibration isolator. The results show that the vibration amplitude of the controlled system around the resonance frequency region decreases and the isolation frequency band is larger compared to the equivalent one. A better isolation performance in the high frequency band can be achieved compared to the passive HSLDS vibration isolator.

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Chen, Cong, Zhong Hong, and Jian-Min Jiang. "Scheduling in Real-Time Mobile Systems." ACM Transactions on Embedded Computing Systems 21, no. 3 (May 31, 2022): 1–36. http://dx.doi.org/10.1145/3517747.

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To guarantee the safety and security of a real-time mobile system such as an intelligent transportation system, it is necessary to model and analyze its behaviors prior to actual development. In particular, the mobile objects in such systems must be isolated from each other so that they do not collide with each other. Since isolation means two or more mobile objects must not be located in the same place at the same time, a scheduling policy is required to control and coordinate the movement of such objects. However, traditional scheduling theories are based on task scheduling which is coarse-grained and cannot be directly used for fine-grained isolation controls. In this article, we first propose a fine-grained event-based formal model called a time dependency structure and use it to model and analyze real-time mobile systems. Next, an event-based schedule is defined and the composition of schedules is discussed. Then, we investigate the schedulability of isolation—that is, checking whether a given schedule ensures the isolation relationship among mobile objects or not. After that, we present an automation approach for scheduling generation to guarantee isolation controls in real-time mobile systems. Finally, case studies and simulation experiments demonstrate the usability and effectiveness of our approach.

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Kumar, Sooraj, and Ganesh Jaiswal. "Effect of Base Isolation using LRB on Stepped Building." International Journal for Research in Applied Science and Engineering Technology 10, no. 7 (July 31, 2022): 4324–30. http://dx.doi.org/10.22214/ijraset.2022.45990.

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Abstract: The base isolation design strategy uncouples the superstructure from the foundation, reducing the effects of earthquake ground motion. The structure is isolated from the ground motion by a flexible base. Installing base isolators in columns. The structural response accelerations are usually less than the ground motion acceleration. In general, base isolation reduces storey shear and acceleration while simultaneously increasing time period, and storey drift, allowing rigid buildings to be more flexible by dispersing energy to the foundation. The basic seismic isolation design provides a shielding technique, allowing the structure to function without harm even after significant earthquakes. The current study explores the seismic effects of a G+6 stepped building with an LRB isolator. An isolator with a lead rubber bearing was used. E-tabs is used to conduct the base isolation study and seismic analysis. The reaction of the structure, lateral shear force, time period, and base shear, was observed. This paper presents time-history analysis and performance assessment analyses on a base isolated stepped building using Bhuj Earthquake ground motion data.

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Dirgantara, Y., C. R. Sartika, A. Chouw, E. D. Pratiwi, D. Meutia, J. Riswandani, E. R. Utami, and S. F. Jundan. "Quarantine Time Validation for UC-MSC Isolation." Cytotherapy 22, no. 5 (May 2020): S196—S197. http://dx.doi.org/10.1016/j.jcyt.2020.04.061.

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Kumar, Sooraj. "Seismic Impact of LRB-based Base Isolation on Stepped Buildings." International Journal for Research in Applied Science and Engineering Technology 10, no. 7 (July 31, 2022): 715–21. http://dx.doi.org/10.22214/ijraset.2022.45336.

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Abstract: The base isolation design strategy uncouples the superstructure from the foundation, reducing the effects of earthquake ground motion. The structure is isolated from the ground motion by a flexible base. Installing base isolators in columns, the base shear values. The structural response accelerations are usually less than the ground motion acceleration. In general, base isolation reduces storey shear and acceleration while simultaneously increasing time period, storey displacement, and storey drift, allowing rigid buildings to be more flexible by dispersing energy to the foundation. The basic seismic isolation design provides a shielding technique, allowing the structure to function without harm even after significant earthquakes. The current study explores the seismic effects of a G+6 stepped building with an LRB isolator. An isolator with a lead rubber bearing was used. E-tabs is used to conduct the base isolation study and seismic analysis. The reaction of the structure, including time period, and Lateral shear force, was observed. This paper presents time-history Analysis and performance assessment analyses on a base isolated stepped building.

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HENDRY, ANDREW P., and TROY DAY. "Population structure attributable to reproductive time: isolation by time and adaptation by time." Molecular Ecology 14, no. 4 (March 16, 2005): 901–16. http://dx.doi.org/10.1111/j.1365-294x.2005.02480.x.

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Yeh, Chun-Chieh, Ling-Jia Wang, James J. Mcgarrigle, Yong Wang, Chien-Chang Liao, Mustafa Omami, Arshad Khan, et al. "Effect of Manufacturing Procedures on Human Islet Isolation from Donor Pancreata Standardized by the North American Islet Donor Score." Cell Transplantation 26, no. 1 (January 2017): 33–44. http://dx.doi.org/10.3727/096368916x692834.

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This study investigates manufacturing procedures that affect islet isolation outcomes from donor pancreata standardized by the North American Islet Donor Score (NAIDS). Islet isolations performed at the University of Illinois, Chicago, from pancreata with NAIDS ≥65 were investigated. The research cohort was categorized into two groups based on a postpurification yield either greater than (group A) or less than (group B) 400,000 IEQ. Associations between manufacturing procedures and islet isolation outcomes were analyzed using multivariate logistic or linear regressions. A total of 119 cases were retrieved from 630 islet isolations performed since 2003. Group A is composed of 40 cases with an average postpurified yield of 570,098 IEQ, whereas group B comprised 79 cases with an average yield of 235,987 IEQ. One third of 119 cases were considered successful islet isolations that yielded >400,000 IEQ. The prepurified and postpurified islet product outcome parameters were detailed for future reference. The NAIDS (>80 vs. 65–80) [odds ratio (OR): 2.91, 95% confidence interval (CI): 1.27–6.70], cold ischemic time (≤10 vs. >10 h) (OR: 3.68, 95% CI: 1.61–8.39), and enzyme perfusion method (mechanical vs. manual) (OR: 2.38, 95% CI: 1.01–5.56) were independent determinants for postpurified islet yield ≥400,000 IEQ. The NAIDS (>80, p < 0.001), cold ischemic time (≤10 h, p < 0.05), increased unit of collagenase ( p < 0.01), and pancreatic duct cannulation time (<30 min, p < 0.01) all independently correlated with better islet quantity parameters. Furthermore, cold ischemic time (≤10 h, p < 0.05), liberase MTF ( p < 0.001), increased unit of collagenase ( p < 0.05), duct cannulation time (<30 min, p < 0.05), and mechanical enzyme perfusion ( p < 0.05) were independently associated with better islet morphology score. Analysis of islet manufacturing procedures from the pancreata with standardized quality is essential in identifying technical issues within islet isolation. Adequate processing duration in each step of islet isolation, using liberase MTF, and mechanical enzyme perfusion all affect isolation outcomes.

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GÜZEL, Pınar, Kadir YILDIZ, Melike ESENTAŞ, and Devrim Zerengök. "“Know-How” to Spend Time in Home Isolation during COVID-19; Restrictions and Recreational Activities." International Journal of Psychology and Educational Studies 7, no. 2 (May 2, 2020): 122–31. http://dx.doi.org/10.17220/ijpes.2020.02.011.

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Lyon, James, Jocelyn E. Manning Fox, Aliya F. Spigelman, Ryekjang Kim, Nancy Smith, Doug O'Gorman, Tatsuya Kin, A. M. James Shapiro, Raymond V. Rajotte, and Patrick E. MacDonald. "Research-Focused Isolation of Human Islets From Donors With and Without Diabetes at the Alberta Diabetes Institute IsletCore." Endocrinology 157, no. 2 (December 11, 2015): 560–69. http://dx.doi.org/10.1210/en.2015-1562.

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Abstract Recent years have seen an increased focus on human islet biology, and exciting findings in the stem cell and genomic arenas highlight the need to define the key features of mature human islets and β-cells. Donor and organ procurement parameters impact human islet yield, although for research purposes islet yield may be secondary in importance to islet function. We examined the feasibility of a research-only human islet isolation, distribution, and biobanking program and whether key criteria such as cold ischemia time (CIT) and metabolic status may be relaxed and still allow successful research-focused isolations, including from donors with type 1 diabetes and type 2 diabetes. Through 142 isolations over approximately 5 years, we confirm that CIT and glycated hemoglobin each have a weak negative impacts on isolation purity and yield, and extending CIT beyond the typical clinical isolation cutoff of 12 hours (to ≥ 18 h) had only a modest impact on islet function. Age and glycated hemoglobin/type 2 diabetes status negatively impacted secretory function; however, these and other biological (sex, body mass index) and procurement/isolation variables (CIT, time in culture) appear to make only a small contribution to the heterogeneity of human islet function. This work demonstrates the feasibility of extending acceptable CIT for research-focused human islet isolation and highlights the biological variation in function of human islets from donors with and without diabetes.

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Mattar, Rahif E., Ayman M. Sulimany, Saad S. Binsaleh, and Ibrahim M. Al-Majed. "Comparison of Fissure Sealant Chair Time and Patients’ Preference Using Three Different Isolation Techniques." Children 8, no. 6 (May 25, 2021): 444. http://dx.doi.org/10.3390/children8060444.

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This randomized clinical trial aimed to evaluate the patient’s preference and chair time needed during pit and fissure sealant placement under three isolation techniques (Isolite system, rubber dam isolation, and cotton roll isolation). Participants, aged 6–15 years and requiring four sealants on the first or second permanent molars, attending the pediatric dental clinics at King Saud University in Saudi Arabia were enrolled according to the inclusion criteria. Each participant received sealants on three random first or second permanent molars using three isolation techniques. The time required for sealant placement was recorded for each technique. Following sealant placement, an interview-based questionnaire was administered to the participants to evaluate their preference regarding the isolation techniques. Forty-eight children (23 male and 25 female) with a mean age of 8.58 ± 1.93 years participated in this study. The mean chair times were 248.14, 255.89, and 243.29 s for the Isolite system, rubber dam isolation, and cotton roll isolation, respectively. Approximately 79% of participants considered cotton roll isolation to be the most comfortable, whereas approximately 71% were significantly less likely to use rubber dam isolation again. In conclusion, there were no significant differences in sealant placement time among the three isolation techniques. However, cotton roll isolation was the technique that was most preferred by the participants.

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Hawthorne, Wayne J., Sussan Davies, Hee-chang Mun, Yi Vee Chew, Lindy Williams, Patricia Anderson, Natasha Rogers, and Philip J. O’Connell. "Successful Islet Outcomes Using Australia-Wide Donors: A National Centre Experience." Metabolites 11, no. 6 (June 5, 2021): 360. http://dx.doi.org/10.3390/metabo11060360.

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Cold ischemia and hence travel time can adversely affect outcomes of islet isolation. The aim of this study was to compare the isolation and transplant outcomes of donor pancreata according to the distance from islet isolation facility. Principally, those within a 50 km radius of the centre were compared with those from regional areas within the state and those from interstate donors within Australia. Organ donors were categorised according to distance from National Pancreas Transplant Unit Westmead (NPTU). Donor characteristics were analysed statistically against islet isolation outcomes. These were age, BMI, cause and mechanism of death, days in ICU, gender, inotrope and steroid use, cold ischemia time (CIT) and retrieval surgical team. Between March 2007 and December 2020, 297 islet isolations were performed at our centre. A total of 149 donor pancreata were local area, and 148 non-local regions. Mean distance from the isolation facility was 780.05 km. Mean pancreas CIT was 401.07 ± 137.71 min and was significantly different between local and non-local groups (297.2 vs. 487.5 min, p < 0.01). Mean age of donors was 45.22 years, mean BMI was 28.82, sex ratio was 48:52 F:M and mean time in ICU was 3.07 days. There was no significant difference between local and non-local for these characteristics. The mean CIT resulting in islet transplantation was 297.1 ± 91.5 min and longest CIT resulting in transplantation was 676 min. There was no significant difference in islet isolation outcomes between local and non-local donors for characteristics other than CIT. There was also no significant effect of distance from the isolation facility on positive islet transplant outcomes (C-peptide > 0.2 at 1 month post-transplant). Conclusions: Distance from the isolation centre did not impact on isolation or transplant outcomes supporting the ongoing nationwide use of shipping pancreata for islet isolation and transplantation.

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Richardson, Stephanie, Corinna Tanner, and Jeremy Yorgason. "Sensory Impairment and Social Isolation: Implications for the Hispanic Population." Innovation in Aging 4, Supplement_1 (December 1, 2020): 617. http://dx.doi.org/10.1093/geroni/igaa057.2096.

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Abstract Although the likelihood of developing a disability increases with age among all demographics, older adults of hispanic origin are more likely to experience vision and hearing impairment than both their white and black non-hispanic counterparts. Both hearing impairment and vision impairment are known risk factors for social isolation, yet little research has examined this association in Hispanic populations. Using data from 472 Hispanic and 5,186 White participants of the NHATS study, we examined 8-year trajectories of social isolation, along with how sensory impairment was associated with initial levels and change over time. Findings suggest that sensory impairments are linked with steeper increases over time among White participants. Among Hispanics vision and hearing impairments were linked with higher initial levels of social isolation, yet no associations were found across time. It may be that Hispanic older adults maintain social connections across time despite potentially isolating sensory impairments.

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Cao, Hao, Yaopeng Chang, Jiaxi Zhou, Xuhui Zhao, Ling Lu, Fei Chen, and Xiaowen Wu. "High-Efficiency Vibration Isolation for a Three-Phase Power Transformer by a Quasi-Zero-Stiffness Isolator." Shock and Vibration 2021 (April 20, 2021): 1–11. http://dx.doi.org/10.1155/2021/5596064.

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The vibrations generated by a three-phase power transformer reduce the comfort of residents and the service life of surrounding equipment. To resolve this tough issue, a quasi-zero-stiffness (QZS) isolator for the transformer is proposed. This paper is devoted to developing a QZS isolator in a simple way for engineering practices. The vertical springs are used to support the heavy weight of the transformer, while the oblique springs are employed to fulfill negative stiffness to neutralize the positive stiffness of the vertical spring. Hence, a combination of the vertical and oblique spring can yield high static but low dynamic stiffness, and the vibration isolation efficiency can be improved substantially. The dynamic analysis for the QZS vibration isolation system is conducted by the harmonic balance method, and the vibration isolation performance is estimated. Finally, the prototype of the QZS isolator is manufactured, and then the vibration isolation performance is tested comparing with the linear isolator under real power loading conditions. The experimental results show that the QZS isolator prominently outperforms the existing linear isolator. This is the first time to devise a QZS isolator for three-phase power transformers with heavy payloads in engineering practices.

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Bourdeau Lepage, Lise, and Balázs Kotosz. "Isolation and well-being in the time of lockdown." REGION 8, no. 2 (September 27, 2021): 83–97. http://dx.doi.org/10.18335/region.v8i2.350.

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In response to the Covid‑19 health crisis, the French government has imposed various measures, referred to as social-distancing measures, including a lockdown with the primary objective of reducing face-to-face interactions between people in order to limit the spread of the virus. This paper seeks to determine if the social-distancing measures and lockdown lead to social isolation for certain people and have an impact on French people’s well-being. First, it reveals that the feelings of social isolation have substantially increased in France during this lockdown. Second, it explores the factors that help to explain these changes by developing a predictive model and reveals that living alone, being a woman, being young are factors that explain this increase in felling of social isolation. Third, the estimation of the effects of changes in feelings of social isolation on changes in the reported level of well-being of French respondents during lockdown shows that people who reported feeling more socially isolated than others has the lowest levels of well-being among the French population; and that the increase in people’s feelings of social isolation during lockdown is a factor that has a negative impact on their level of well-being.

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Vibhute, A. S., S. D. Bharti, M. K. Shrimali, and S. Vern. "Seismic Performance of Elastomeric and Sliding Friction Isolation System." Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2 1, no. 1 (December 19, 2022): 815–19. http://dx.doi.org/10.38208/acp.v1.588.

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The base isolation technique is widely used in the isolation of structures for providing efficient protection to structures concerning different loadings. This study aims to evaluate comparative performance and inelastic responses of the base-isolated structure for two types of isolation systems under the Far-field and Near-field earthquake. For this purpose, seismic response quantities like base shear, peak ?oor displacement, absolute acceleration, and isolator displacement for ten-story reinforced concrete building frame base isolated by lead rubber bearings (LRBs) are evaluated and compared with the seismic response of the same structure base isolated by Friction Pendulum Bearing Isolator. Nonlinear time history analysis is carried out to investigate the inelastic behavior of the base-isolated structure. The building frame was designed according to IS1893:2016 seismic code and IS 456:2000. To represent a wide range of assessments, a 10 storey building frame taking identical isolation parameters for elastomeric and sliding isolation system was analyzed in SAP 2000. It was observed that the responses of both the isolation system are nearly the same for all the three earthquakes.

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Ozbulut, Osman E., and Stefan Hurlebaus. "A Comparative Study on the Seismic Performance of Superelastic-Friction Base Isolators against Near-Field Earthquakes." Earthquake Spectra 28, no. 3 (August 2012): 1147–63. http://dx.doi.org/10.1193/1.4000070.

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This paper presents a comparative seismic performance assessment of super-elastic-friction base isolator (S-FBI) systems in improving the response of bridges under near-field earthquakes. The S-FBI system consists of a steel-Teflon sliding bearing and a superelastic shape memory alloy (SMA) device. The other isolation systems considered here are lead rubber bearing (LRB), friction pendulum system (FPS), and resilient-friction base isolator (R-FBI). Each isolation system is designed to provide the same isolation period and characteristic strength. Nonlinear time-history analyses of an isolated bridge are performed to compare the performance of various isolation systems. The results indicate that the S-FBI system shows superior performance in reducing deck displacement response and effectively limits permanent bearing deformation, whereas residual deformations are present for the other isolation systems in some cases. It is also observed that the LRB system has the largest deck drifts while the FPS system and R-FBI system produce the smallest peak deck acceleration and base shear.

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Mock, Adam. "Optical Isolation using Compact Time-modulated Cavity Array." Applied Computational Electromagnetics Society 35, no. 11 (February 3, 2021): 1276–77. http://dx.doi.org/10.47037/2020.aces.j.351107.

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It is shown using coupled mode theory and verified using finite-difference time-domain simulations how a time-modulated three-cavity array can be designed to allow transmission from port 1 to port 2 but to prevent transmission from port 2 to port 1 thereby implementing optical isolation. The reciprocity of the system is broken by phase-shifting the modulation signal applied to each cavity by 120 degrees which gives the system a synthetic linear momentum.

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Donovan, Victoria. "Watching Muratova in a Time of Social Isolation." Frames Cinema Journal, no. 18 (June 23, 2021): 290. http://dx.doi.org/10.15664/fcj.v0i18.2267.

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O’Donnell, Ian. "Time and isolation as performance art: A note." Crime, Media, Culture: An International Journal 10, no. 1 (April 2014): 81–86. http://dx.doi.org/10.1177/1741659014528345.

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30

Martin, K. W. "The isolation of undistorted sinusoids in real time." IEEE Transactions on Acoustics, Speech, and Signal Processing 38, no. 2 (1990): 360–64. http://dx.doi.org/10.1109/29.103074.

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Deakin, Simon. "Part Time Work: Further Isolation on Social Policy." Cambridge Law Journal 51, no. 1 (March 1992): 26–29. http://dx.doi.org/10.1017/s000819730001669x.

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Ankrum, Andrea L., Smriti Neogi, Molynda A. Morckel, Adam W. Wilhite, Zhaoyan Li, and Joshua K. Schaffzin. "Reduced isolation room turnover time using Lean methodology." Infection Control & Hospital Epidemiology 40, no. 10 (July 26, 2019): 1151–56. http://dx.doi.org/10.1017/ice.2019.199.

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AbstractObjective:To prevent environmental transmission of pathogens, hospital rooms housing patients on transmission-based precautions are cleaned extensively and disinfected with ultraviolet (UV) light. To do so consistently requires time and coordination, and these procedures must avoid patient flow delays and associated safety risks. We sought to improve room turnover efficiency to allow for UV disinfection.Design:A 60-day quality improvement and implementation project.Setting:A quaternary academic pediatric referral facility.Interventions:A multidisciplinary healthcare team participated in a 60-day before-and-after trial that followed the Toyota Production System Lean methodology. We used value-stream mapping and manual time studies to identify areas for improvement. Areas addressed included room breakdown, room cleaning, and wait time between cleaning and disinfection. Room turnover was measured as the time in minutes from a discharged patient exiting an isolation room to UV disinfection completion. Impact was measured using postintervention manual time studies.Results:Median room turnover decreased from 130 minutes (range, 93–294 minutes) to 65 minutes (range, 48–95 minutes; P < .0001). Other outcomes included decreased median time between room breakdown to cleaning start time (from 10 to 3 minutes; P = .004), room cleaning complete to UV disinfection start (from 36 to 8 minutes; P < .0001), and the duration of room cleaning and curtain changing (from 57 to 37 minutes; P < .0001).Conclusion:We decreased room turnover time by half in 60 days by decreasing times between and during routine tasks. Utilizing Lean methodology and manual time study can help teams understand and improve hospital processes and systems.

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Xu, Ye-Long, Liang Feng, Ming-Hui Lu, and Yan-Feng Chen. "Optical Isolation by Time-Dependent Sinusoidal-Shaped Structures." Chinese Physics Letters 30, no. 9 (September 2013): 094202. http://dx.doi.org/10.1088/0256-307x/30/9/094202.

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Moshos, Judy A., Deborah Reid, Wasif Hafeez, Elaine Flanagan, Carlos Reyes Sacin, and Keith Kaye. "Time to Contact Isolation: Manual vs. Automated Surveillance." American Journal of Infection Control 41, no. 6 (June 2013): S53. http://dx.doi.org/10.1016/j.ajic.2013.03.111.

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Berkova, Zuzana, Frantisek Saudek, Peter Girman, Klara Zacharovova, Jan Kriz, Eva Fabryova, Ivan Leontovyc, et al. "Combining Donor Characteristics with Immunohistological Data Improves the Prediction of Islet Isolation Success." Journal of Diabetes Research 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/4214328.

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Variability of pancreatic donors may significantly impact the success of islet isolation. The aim of this study was to evaluate donor factors associated with isolation failure and to investigate whether immunohistology could contribute to organ selection. Donor characteristics were evaluated for both successful (n=61) and failed (n=98) islet isolations. Samples of donor pancreatic tissue (n=78) were taken for immunohistochemical examination. Islet isolations with 250000 islet equivalents were considered successful. We confirmed that BMI of less than 25 kg/m2(P<0.001), cold ischemia time more than 8 hours (P<0.01), hospitalization longer than 96 hours (P<0.05), higher catecholamine doses (P<0.05), and edematous pancreases (P<0.01) all unfavorably affected isolation outcome. Subsequent immunohistochemical examination of donor pancreases confirmed significant differences in insulin-positive areas (P<0.001). ROC analyses then established that the insulin-positive area in the pancreas could be used to predict the likely success of islet isolation (P<0.001). At the optimal cutoff point (>1.02%), sensitivity and specificity were 89% and 76%, respectively. To conclude, while the insulin-positive area, determined preislet isolation, as a single variable, is sufficient to predict isolation outcome and helps to improve the success of this procedure, its combination with the established donor scoring system might further improve organ selection.

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Biyani, Rajlaxmi, Anupam Joshi, Gretchen Tucker, Dana Bradley, and Carmen Sceppa. "DEVELOPING A MOBILE PHONE APPLICATION TO DETECT SOCIAL ISOLATION OVER MULTIPLE TIME POINTS." Innovation in Aging 6, Supplement_1 (November 1, 2022): 714–15. http://dx.doi.org/10.1093/geroni/igac059.2610.

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Abstract Social isolation is an important predictor of mortality and morbidity in older persons. The increase in social isolation is often a result of major life events such as retirement, leading to the loss of social connections. The effects of the pandemic have exacerbated the loss of social connectedness. Measures to ensure social distancing have made technologies like voice and video calling, text messaging, and other phone mediated communication important resources for connecting people. Measuring social isolation often requires periodic administration of a paper survey instrument, like the Lubben Social Network Scale (LSNS). The approach was taken by Lubben for predicting a person’s social isolation level typically involves looking at their general frequency of interactions with family and friends along with the specific frequencies of private, tentative discussions happening during those interactions. This paper explores the process used to develop a tool to measure social isolation continuously and automatically by using an older person’s frequency and tone of telephonic conversations. We categorized a person’s family and friends into three sub-categories based on the self-reported level of closeness shared with them. We then analyzed the person’s conversation (content and tones). Lastly, we trained the deep learning model (Watson) using these captured tone values to determine the social isolation index of the individual. Our preliminary results indicate that we are able to correctly predict their degree of social isolation as judged by Lubben’s scale using their phone conversations. This technology may be promising for the assessment and intervention of social isolation.

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Opie, S., and W. Yim. "Design and Control of a Real-Time Variable Modulus Vibration Isolator." Journal of Intelligent Material Systems and Structures 22, no. 2 (January 2011): 113–25. http://dx.doi.org/10.1177/1045389x10389204.

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A magnetorheological elastomer (MRE-based semi-active (SA) vibration isolator is developed and tested in real-time with a SA controller, illustrating the feasibility of MRE-based isolators. While several researchers have applied MREs to tunable vibration absorbers (TVAs), little work has been done using MREs in primary isolation systems. Further, in cases where TVAs were developed, few SA controllers were implemented in proof of concept experiments. This article presents a magnetically biased MRE-based vibration isolator, which enables the device to have a fail-safe operation in the event of a power failure. To test the effectiveness of the MRE isolator, a SA controller is developed to minimize the payload velocity. A comparison by simulation of variable modulus and damping systems is also presented. Finally, experimental results are given, showing that the MRE isolator and SA controller system reduce resonances and payload velocities by 16-30% when compared to passive systems.

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Weinstein, Netta, and Thuy-Vy Nguyen. "Motivation and preference in isolation: a test of their different influences on responses to self-isolation during the COVID-19 outbreak." Royal Society Open Science 7, no. 5 (May 2020): 200458. http://dx.doi.org/10.1098/rsos.200458.

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This multi-wave study examined the extent that both preference and motivation for time alone shapes ill-being during self-isolation. Individuals in the USA and the UK are self-isolating in response to the COVID-19 outbreak. Different motivations may drive their self-isolation: some might see value in it (understood as the identified form of autonomous motivation), while others might feel forced into it by authorities or close others (family, friends, neighbourhoods, doctors; the external form of controlled motivation). People who typically prefer company will find themselves spending more time alone, and may experience ill-being uniformly, or as a function of their identified or external motivations for self-isolation. Self-isolation, therefore, offers a unique opportunity to distinguish two constructs coming from disparate literatures. This project examined preference and motivation (identified and external) for solitude, and tested their independent and interacting contributions to ill-being (loneliness, depression and anxiety during the time spent alone) across two weeks. Confirmatory hypotheses regarding preference and motivation were not supported by the data. A statistically significant effect of controlled motivation on change in ill-being was observed one week later, and preference predicted ill-being across two weeks. However, effect sizes for both were below our minimum threshold of interest.

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Zhao, Nan, Kai Ma, Hai Xia Geng, and Ting Li. "Analysis of Vertical Isolation and Earthquake Prevention on Isolation Structure." Advanced Materials Research 255-260 (May 2011): 2546–49. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.2546.

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According to Fast Fourier Transform we can work out main frequency of vertical vibration wave. Combining natural frequency of vibration of the structure we evaluate whether isolation layer have effect. Combine with a multi-tower with a large base structure located above subway, We use time history method and consider different vertical tensile-compressive stiffness of rubber bearing, Storey acceleration response of the structure under vertical earthquake and subway vibration was calculated. The result shows that it have no effect that isolation layer with regard to vertical earthquake, but have obvious effect to reduce subway vibration, At the same time, storey acceleration response is reduced markedly, comfort level can be increased greatly.

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Pomeroy, Mary Louise, Gilbert Gimm, Alison Cuellar, Emily Ihara, and Thomas Cudjoe. "ASSOCIATIONS BETWEEN SOCIAL ISOLATION AND HOSPITAL STAYS, NURSING HOME ENTRY, AND MORTALITY OVER TIME." Innovation in Aging 6, Supplement_1 (November 1, 2022): 180. http://dx.doi.org/10.1093/geroni/igac059.721.

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Abstract This study examined social isolation as a risk factor for hospitalization, nursing home stays, and mortality among a longitudinal sample of 12,860 community-dwelling older adults ages 65+ between 2006-2018. Using seven waves of Health and Retirement Study (HRS) data, we examined associations between social isolation and hospitalization, nursing home stays, and mortality. Social isolation scores ranged from 0-6 using an established typology with six objective measures of social interactions: 1) marital status; 2) living arrangement; 3) monthly communication with children; 4) family; 5) and friends; and, 6) monthly participation in groups, clubs, organizations, or religious services. Covariates included fixed demographics and time-variant characteristics including loneliness, depression, Medicaid enrollment, lifestyle behaviors, activities of daily living, number of chronic conditions, and Alzheimer’s disease or related dementias. Logistic regression analyses were conducted with panel data and random effects to examine associations between social isolation and each outcome over time. About 15% of the sample was socially isolated, with an average isolation score of 1.29. Social isolation significantly increased the odds of having a nursing home stay (OR = 1.22, p < 0.001) and mortality (OR = 1.14, p < 0.001). However, it was not significantly associated with overnight hospitalizations (OR = 0.97, p = 0.09). Social isolation may put older adults at greater risk for nursing home stays and mortality over time, as compared to social integration. Policies and practices to reduce social isolation can support aging at home or the community, delay nursing home entry, and reduce the risk of mortality.

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Amir, M. A., and N. H. Hamid. "Hysteresis Loops of Base Isolation System - An Overview." Key Engineering Materials 879 (March 2021): 189–201. http://dx.doi.org/10.4028/www.scientific.net/kem.879.189.

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Recently, there are a lot of technological developments in the earthquake engineering field to reduce structural damage and one of them is a base isolation system. The base isolation system is one of the best technologies for the safety of human beings and properties under earthquake excitations. The aim of this paper is to review previous research works on simulation of base isolation systems for RC buildings and their efficiency in the safety of these buildings. Base isolation decouples superstructure from substructure to avoid transmission of seismic energy to the superstructure of RC buildings. The most effective way to assess the base isolation system for RC building under different earthquake excitations is by conducting experiment work that consumes more time and money. Many researchers had studied the behavior of base isolation system for structure through modeling the behavior of the base isolation in which base isolator is modeled through numerical models and validated through experimental works. Previous researches on the modeling of base isolation systems of structures had shown similar outcomes as the experimental work. These studies indicate that base isolation is an effective technology in immunization of structures against earthquakes.

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Kirschel, Alexander N. G., Emmanuel C. Nwankwo, Nadya Seal, and Gregory F. Grether. "Time spent together and time spent apart affect song, feather colour and range overlap in tinkerbirds." Biological Journal of the Linnean Society 129, no. 2 (January 3, 2020): 439–58. http://dx.doi.org/10.1093/biolinnean/blz191.

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Abstract Most studies on the processes driving evolutionary diversification highlight the importance of genetic drift in geographical isolation and natural selection across ecological gradients. Direct interactions among related species have received much less attention, but they can lead to character displacement, with recent research identifying patterns of displacement attributed to either ecological or reproductive processes. Together, these processes could explain complex, trait-specific patterns of diversification. Few studies, however, have examined the possible effects of these processes together or compared the divergence in multiple traits between interacting species among contact zones. Here, we show how traits of two Pogoniulus tinkerbird species vary among regions across sub-Saharan Africa. However, in addition to variation between regions consistent with divergence in refugial isolation, both song and morphology diverge between the species where they coexist. In West Africa, where the species are more similar in plumage, there is possible competitive or reproductive exclusion. In Central and East Africa, patterns of variation are consistent with agonistic character displacement. Molecular analyses support the hypothesis that differences in the age of interaction among regions can explain why species have evolved phenotypic differences and coexist in some regions but not others. Our findings suggest that competitive interactions between species and the time spent interacting, in addition to the time spent in refugial isolation, play important roles in explaining patterns of species diversification.

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Olack, Barbara J., Michael Alexander, Carol J. Swanson, Julie Kilburn, Nicole Corrales, Antonio Flores, Jennifer Heng, et al. "Optimal Time to Ship Human Islets Post Tissue Culture to Maximize Islet." Cell Transplantation 29 (January 1, 2020): 096368972097458. http://dx.doi.org/10.1177/0963689720974582.

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Access to functional high-quality pancreatic human islets is critical to advance diabetes research. The Integrated Islet Distribution Program (IIDP), a major source for human islet distribution for over 15 years, conducted a study to evaluate the most advantageous times to ship islets postisolation to maximize islet recovery. For the evaluation, three experienced IIDP Islet Isolation Centers each provided samples from five human islet isolations, shipping 10,000 islet equivalents (IEQ) at four different time periods postislet isolation (no 37°C culture and shipped within 0 to 18 hours; or held in 37°C culture for 18 to 42, 48 to 96, or 144 to 192 hours). A central evaluation center compared samples for islet quantity, quality, and viability for each experimental condition preshipment and postshipment, as well as post 37°C culture 18 to 24 hours after shipment receipt. Additional evaluations included measures of functional potency by static glucose-stimulated insulin release (GSIR), represented as a stimulation index. Comparing the results of the four preshipment holding periods, the greatest IEQ loss postshipment occurred with the shortest preshipment times. Similar patterns emerged when comparing preshipment to postculture losses. In vitro islet function (GSIR) was not adversely impacted by increased tissue culture time. These data indicate that allowing time for islet recovery postisolation, prior to shipping, yields less islet loss during shipment without decreasing islet function.

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Grasso, G. M., M. M. D'errico, F. Schioppa, F. Romano, and D. Montanaro. "Use of colistin and sorbitol for better isolation ofSerratia marcescensin clinical samples." Epidemiology and Infection 101, no. 2 (October 1988): 315–20. http://dx.doi.org/10.1017/s0950268800054248.

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SUMMARYA comparison was made of different culture media and procedures for detection ofSerratia marcescensfrom faecal, pharyngeal and ocular swabs collected from 213 neonates. MacConkey agar and MacConkey agar with sorbitol (1%) and/or colistin (200 i.u./ml) were used both for primary isolation and after enrichment using Mossel Enterobacteriaceae broth with colistin (200 i.u./ml). The use of MacConkey agar supplemented with colistin for primary isolation improved considerably the isolation rate ofS. marcescensfrom faecal swabs but not from pharyngeal swabs; the number of ocular isolations were insufficient to demonstrate differences between procedures. Moreover the enrichment procedures consistently increased the number ofS. marcescensisolates especially from pharyngeal and ocular swabs. Use of sorbitol made detection ofS'. marcescensfrom clinical specimens easier and time– and cost–efficient.

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Meskin, N., and K. Khorasani. "Fault Detection and Isolation of Distributed Time-Delay Systems." IEEE Transactions on Automatic Control 54, no. 11 (November 2009): 2680–85. http://dx.doi.org/10.1109/tac.2009.2031578.

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Hofreiter, Milan, and Gunça Garajaÿewa. "REAL-TIME FAULT DETECTION AND ISOLATION WITH SUPERVISED TRAINING." IFAC Proceedings Volumes 39, no. 13 (2006): 623–28. http://dx.doi.org/10.3182/20060829-4-cn-2909.00103.

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Tammilehto, Anna, Phillip C. Watts, and Nina Lundholm. "Isolation by Time During an Arctic Phytoplankton Spring Bloom." Journal of Eukaryotic Microbiology 64, no. 2 (September 14, 2016): 248–56. http://dx.doi.org/10.1111/jeu.12356.

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Nyatanga, Brian. "Loneliness, social isolation and time alone in your shed." International Journal of Palliative Nursing 23, no. 9 (September 2, 2017): 419. http://dx.doi.org/10.12968/ijpn.2017.23.9.419.

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Aschoff, Jürgen. "On the Passage of Subjective Time in Temporal Isolation." Psychologica Belgica 33, no. 2 (January 1, 1993): 147. http://dx.doi.org/10.5334/pb.844.

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Aschoff, Jürgen, Christiana Von Goetz, Christine Wildgruber, and Riitger A. Wever. "Meal Timing in Humans during Isolation without Time Cues." Journal of Biological Rhythms 1, no. 2 (June 1986): 151–62. http://dx.doi.org/10.1177/074873048600100206.

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Journal articles on the topic 'Time isolation'

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