Academic literature on the topic 'Hand off time'

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Journal articles on the topic "Hand off time"

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Zelouf, D. S. "Time Off Work in Hand Injury Patients." Yearbook of Hand and Upper Limb Surgery 2009 (January 2009): 220–21. http://dx.doi.org/10.1016/s1551-7977(09)79173-3.

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SKOV, O., B. JEUNE, J. M. LAURITSEN, and T. BARFRED. "Time Off Work After Occupational Hand Injuries." Journal of Hand Surgery 24, no. 2 (April 1999): 187–89. http://dx.doi.org/10.1054/jhsb.1998.0180.

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This study analysed the impact of several factors on the start and duration of time off work among 802 patients with occupational hand injuries, in order to identify prognostic indicators. The study showed that external factors such as work and social condition seemed to have less influence on time off work than expected, whereas advice from doctors, flashbacks and impairment symptoms were important determinants.
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Wong, Joyce Y. P. "Time Off Work in Hand Injury Patients." Journal of Hand Surgery 33, no. 5 (May 2008): 718–25. http://dx.doi.org/10.1016/j.jhsa.2008.01.015.

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Chalkias, Athanasios, Nikolaos Vogiatzakis, Konstantinos Tampakis, Maria Kalafati, Lila Papadimitriou, and Theodoros Xanthos. "One-hand chest compression and hands-off time in single-lay rescuer CPR—a manikin study." American Journal of Emergency Medicine 31, no. 10 (October 2013): 1462–65. http://dx.doi.org/10.1016/j.ajem.2013.07.030.

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Hage, J. Joris. "History Off-Hand: Bunnell’s No-Man’s Land." HAND 14, no. 4 (December 14, 2017): 570–74. http://dx.doi.org/10.1177/1558944717744337.

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Background: To date, it remains unclear what inspired Dr Sterling Bunnell to start using the typical World War I military term no-man’s land in hand surgical context, only in 1948. To commemorate that Bunnell passed away 60 years ago on August 20, I report on my quest to clarify this. Methods: An extensive bibliography of Bunnell was made up by use of the McDowell Series of Plastic Surgery Indexes and cross-checked by use of a PubMed search. Bunnell’s round-robin letters were searched for in the Sterling Bunnell Hand Surgery Archives of the California Pacific Medical Center Health Services Library in San Francisco, California. In addition, some of the second-generation hand surgeons were personally approached to try and trace the round-robin letters. Finally, the publications of the chiefs of the 9 hand surgical centers and 6 coworkers of Bunnell were checked for referrals to the term no-man’s land. Results: Prior to 1948, no-man’s land was not used in print in hand surgical context. Bunnell’s nearness to the trenches during World War I appears not to have inspired him immediately to start using the term. The reconnaissance tunnels dug through the soil of the no man’s land between the Allied and German trenches likely inspired him to replace a cut tendon through incisions proximal and distal to no-man’s land. Conclusions: Bunnell must have associated his tendon grafting techniques to that of the World War I trenches and tunnels at some time between 1947 and 1948.
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Jathal, Kunal. "Real-Time Timbre Classification for Tabletop Hand Drumming." Computer Music Journal 41, no. 2 (June 2017): 38–51. http://dx.doi.org/10.1162/comj_a_00419.

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The plethora of electronic drum controllers on the market today are designed for “location-oriented” striking techniques, resulting in an interaction paradigm for finger drumming that is increasingly “controllerist.” Interfaces such as these use the controller in the manner of a musical instrument rather than a simple mixer. The minority of controllers that allow hand-drumming techniques also either conform to region-based triggering design, or, in a trade-off for expressivity, skip out on hardware connectivity options that are vital to the context of the electronic rhythm producer. This article describes the design and implementation of HandSolo, a real-time, timbre-classification drum controller that allows the use of natural hand-drumming strokes, while offering the same end-goal functionality that drum controller users have come to familiarize themselves with over the past decade.
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Fletcher, Leslie. "A wrinkle in time: dermal fillers lend a hand where neuromodulators leave off." Journal of Aesthetic Nursing 6, Sup1 (February 2017): 5. http://dx.doi.org/10.12968/joan.2017.6.sup1.5.

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Wataya, Erick Yoshio, Carlos Eduardo Azuma Lijo, Mateus Saito, Marco Antonio Pontes, Caio Takano Kunitake, and Marcelo Rosa de Rezende. "LIFE QUALITY EVALUATION USING “TIME TRADE OFF” METHOD FOR RHEUMATOID HANDS." Acta Ortopédica Brasileira 26, no. 6 (December 2018): 374–78. http://dx.doi.org/10.1590/1413-785220182606199308.

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ABSTRACT Objective: Rheumatoid arthritis is a prevalent disease in the population (range 0.5% to 1%) and involves both orthopedic and rheumatologic treatment. The Time Trade-Off (TTO) technique, which determines the number of years the patient or the professional would be allowed before a successful procedure in terms of life expectancy and value of the procedure, has been gaining ground in clinical protocols. From this standpoint, we sought to compare evaluations provided by the patients, orthopedists, and rheumatologists in determining the TTO and to correlate their responses with the clinical repercussions using previously established scores such as the Brief Michigan Hand Questionnaire and the Disease Activity Score-28 (DAS-28). Methods: A prospective study was conducted that involved 37 patients with rheumatoid arthritis, orthopedists, and rheumatologists. The TTO questionnaire was administered by an independent evaluator for evaluation using the DAS-28 and the Brief Michigan Hand Questionnaire. Results: The descriptive analysis revealed similar medians between the orthopedists, rheumatologists, and patients for single assessments. However, there was a weak correlation between the results from the patient and rheumatologist, the patient and Brief Michigan Questionnaire, and those of the orthopedic surgeon and the DAS-28. Conclusion: Similar median values demonstrated equivalent TTO among the orthopedist, rheumatologist, and patient. However, given the weak correlations between the scores, it was not possible to substitute results using a single evaluation scale. Level of Evidence II, Prognostic Studies.
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Dalal, Priti G., Theodore J. Cios, Theodore K. M. DeMartini, Amit A. Prasad, Meghan C. Whitley, Joseph B. Clark, Leon Lin, Dennis J. Mujsce, and Robert E. Cilley. "A Model for a Standardized and Sustainable Pediatric Anesthesia-Intensive Care Unit Hand-Off Process." Children 7, no. 9 (September 3, 2020): 123. http://dx.doi.org/10.3390/children7090123.

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Background and Objectives: The hand-off process between pediatric anesthesia and intensive care unit (ICU) teams involves the exchange of patient health information and plays a major role in reducing errors and increasing staff satisfaction. Our objectives were to (1) standardize the hand-off process in children’s ICUs, and (2) evaluate the provider satisfaction, efficiency and sustainability of the improved hand-off process. Methods: Following multidisciplinary discussions, the hand-off process was standardized for transfers of care between anesthesia-ICU teams. A pre-implementation and two post-implementation (6 months, >2 years) staff satisfaction surveys and audits were conducted to evaluate the success, quality and sustainability of the hand-off process. Results: There was no difference in the time spent during the sign out process following standardization—median 5 min for pre-implementation versus 5 and 6 min for post-implementation at six months and >2 years, respectively. There was a significant decrease in the number of missed items (airway/ventilation, venous access, medications, and laboratory values pertinent events) post-implementation compared to pre-implementation (p ≤ 0.001). In the >2 years follow-up survey, 49.2% of providers felt that the hand-off could be improved versus 78.4% in pre-implementation and 54.2% in the six-month survey (p < 0.001). Conclusion: A standardized interactive hand-off improves the efficiency and staff satisfaction, with a decreased rate of missed information at the cost of no additional time.
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Hermann, Christopher, Metta Watters, Rebecca Sharrer, and Randy Ennis. "Multi-Facility Reduction in Hospital-Acquired Infections (HAIs) Through Real-Time Feedback and Individual Accountability." Infection Control & Hospital Epidemiology 41, S1 (October 2020): s323—s324. http://dx.doi.org/10.1017/ice.2020.923.

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Background: Hospital-acquired infections (HAIs) are a leading cause of healthcare morbidity and cost for the health community. It is widely recognized that hand hygiene is the leading contributor infections, but hand hygiene still remains a major problem for nearly all healthcare systems. A longitudinal study was conducted over a 4-year period in a community-based health system. Methods: An electronic hand hygiene reminder system was installed in 2 different facilities including both critical care and noncritical units. This system collects data on individual healthcare provider hand hygiene and provides a real-time voice reminder in the event that a provider forgets to perform hand hygiene. The primary study was designed to investigate the impact of a real-time voice reminder to improve hand hygiene. A baseline period of hand hygiene was established prior to the interventions after installing the system without any access to data reporting or the voice reminder. Each of the hospitals had the voice reminder turned on and off 3 times. The baseline HAI rates were established by comparing in each facility for the 12 months prior to the implementation of the system. During the study period, there were no significant changes to other common infection control practices. Results: In both facilities, every time the voices were turned on, hand hygiene improved significantly and each clinical unit saw a >200% improvement in hand hygiene within 3 months of turning the voice reminder. HAIs fell by a statistically significant in all clinical areas by 51%. After a period of stabilization, the voice reminder was turned off hand hygiene compliance fell and HAI rates then increased. The voice reminder was then turned back on and off 2 more times. In every case, hand hygiene rates fell back to the baseline and HAIs returned to their baseline. When the voice reminder was then turned back on, HAIs dropped to 54%–81% of the baseline in each of the clinical units. The system also captured individual providers’ hand hygiene performance data and displayed it in a simple and engaging way, allowing managers easily understand who was struggling with hand hygiene. These data were then leveraged through a series of competitions to systematically drive hand hygiene performance improvement. These included traditional interventions to address an education issue in addition to interventions to identify workflow problems. Conclusions: Using this highly targeted approach, the leadership were able to efficiently drive sustained hand hygiene improvement and a further reduction in HAIs.Funding: NoneDisclosures: None
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Dissertations / Theses on the topic "Hand off time"

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Banh, Mai Thi Quynh, and n/a. "Quantification, characterisation and impact evaluation of mobile IPv6 hand off times." Swinburne University of Technology, 2005. http://adt.lib.swin.edu.au./public/adt-VSWT20070608.094836.

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There is a growing range of IP-based data and voice applications using mobile devices (e.g. 3rd , 4th generation mobile phones and PDAs) and new access technologies (e.g. Bluetooth, 802.11, GPRS, ADSL). This growth is driving a desire to support mobility at the IP level � in other words, allowing an IP host to keep on communicating with other hosts while roaming between different IP subnetworks. Mobile IPv6 allows hosts to move their physical and topological attachment points around an IPv6 network while retaining connectivity through a single, well-known Home Address. Although Mobile IPv6 has been the subject of simulation studies, the real-world dynamic behavior of Mobile IPv6 is only gradually being experimentally characterised and analysed. This thesis reviews the use of Mobile IPv6 to support mobility between independent 802.11b-attached IPv6 subnets, and experimentally measures and critically evaluates how long an end to end IP path is disrupted when a Mobile IPv6 node shifts from one subnetwork to another (handoff time). The thesis describes the development of an experimental testbed suitable for gathering real-world Mobile IPv6 handoff data using publicly available, standards compliant implementations of Mobile IPv6. (An open-source Mobile IPv6 stack (the KAME release under FreeBSD) was deployed). The component of handoff time due to 802.11b link layer handoff is measured separately to assess its impact on the overall Mobile IPv6 handoff time. Using Mobile IPv6 handoff results, the likely performance impact of Mobile IPv6 handoff on a common webcam application and a bulk TCP data transfer is also evaluated. The impact of handoff on these applications clearly shows that a default Mobile IPv6 environment would be highly disruptive to real-time and interactive applications during handoff events, even if the underlying link-layer handoff was instantaneous.
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Papier, Mark Elliot. "Real-time measurement of on-road fine particulate matter in Atlanta." Thesis, Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22544.

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Particulate matter is increasingly linked to health effects not only for what was previously thought to be just a respiratory problem, but also for the cardiovascular system. Literature not only supports that high particulate matter over long periods of time is correlated to morbidity and mortality due to both cardiovascular and respiratory means, but that high levels of particulate matter, even in short bursts of high concentrations, may be the triggering mechanism for the onset of such problems. Due to automobiles being a prime source of particulate matter, roadway concentrations are often higher than those measured at off-road measurement sites run by various parts of the United States Government. Furthermore, the government run sites are averaged over timescales at a minimum of an hour and at a maximum of a running three-day twenty-four hour length. These are both so long that mesoscale information about the particulate matter, such as short duration high intensity bursts, would be completely removed from the dataset. This study utilizes a real-time portable instrumentation package, which can effectively measure particulate matter concentrations on the roadways of metro Atlanta. Measurements are taken both inside the cabin of a vehicle, which does have an in-cabin filtration system, and on a bicycle ridden along the streets without any form of filtration. These instruments, specifically calibrated handheld particle counters, did indeed find some spikes of particulates above the government s one-hour averages inside the cabin of a vehicle. Arguably more importantly, while riding a bicycle these handheld particle counters also found spikes of particulates approaching six times the amount monitored by the government sites, and several roadway averages that were higher than the off-road averages for the same time.
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Banh, Mai. "Quantification, characterisation and impact evaluation of mobile IPv6 hand off times." Australasian Digital Thesis Program, 2007. http://adt.lib.swin.edu.au/public/adt-VSWT20070608.094836/index.html.

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Thesis (MEng) - Swinburne University of Technology, Centre for Advanced Internet Architectures, 2005.
[A thesis submitted in total fulfillment of the requirements of for the degree of ] Masters of Engineering by Research, Centre for Advanced Internet Architectures (CAIA), Faculty of Information and Communication Technologies, Swinburne University of Technology, 2005. Typescript. Bibliography p. 153-159.
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Martinoty, Laurine. "Intrahousehold Allocation of Time and Consumption during Hard Times." Thesis, Lyon, École normale supérieure, 2015. http://www.theses.fr/2015ENSL1021/document.

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Les conséquences des chocs économiques négatifs sur les ménages ont été documentés extensivement, mais on en sait beaucoup moins sur la manière dont ces chocs sont transmis aux individus à travers la médiation du ménage. Le ménage contribue-il à modérer l'effet des chocs négatifs ? Dans quelle mesure le choc économique pèse-t-il dans la négociation familiale ? À partir de données sur la crise économique argentine de 2001, je montre d'abord que les femmes en couple ont une plus grande probabilité de devenir actives si leur mari a fait l'expérience d'un choc de revenu. Ensuite, je montre que le cycle économique importe dans les décisions d'investissement en capital humain. Sur le long terme, les profils de salaire et d'employabilité des hommes argentins sont affectés de manière persistante par les conditions économiques initiales au moment de l'obtention du diplôme. Enfin, je considère la dimension “man-cession” de la crise économique de 2009 en Espagne et montre que la part des ressources du ménage reçues par les femmes pour leur consommation privée augmente avec la diminution de l'écart des taux de chômage hommes-femmes, confortant l'hypothèse que les chocs négatifs modifient le pouvoir de négociation des individus au sein du ménage
The consequences of adverse aggregate shocks on households have been repeatedly documented, but far less has been said on the way they are passed over to individuals through the mediation of the household. Does the household contribute in mitigating the effects? Or does the economic shock rather invite itself at the family negociating table? Using the Argentine 2001 economic crisis as a natural experiment, I first show that married women are more likely to enter the labor market if their husband experienced a loss in income, giving credit to the insurance mechanism. Then, I show that the business cycle matters for investments in education, and that long run labor outcomes of Argentine men are persistently affected by the initial conditions upon graduation. Finally, I consider the “Mancession” dimension of the Great Recession in Spain and demonstrate that the resource share accruing to wives for own consumption increases together with the decreasing unemployment gap, which comes in support to the bargaining hypothesis
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Zhu, Hong Min. "Real-time hand gesture recognition using motion tracking." Thesis, University of Macau, 2010. http://umaclib3.umac.mo/record=b2182870.

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Radder, Dirk [Verfasser], Jan [Akademischer Betreuer] Peleska, and Görschwin [Akademischer Betreuer] Fey. "Hard Real-Time Linux for Off-The-Shelf Multicore Architectures / Dirk Radder. Betreuer: Jan Peleska. Gutachter: Jan Peleska ; Görschwin Fey." Bremen : Staats- und Universitätsbibliothek Bremen, 2015. http://d-nb.info/1079652302/34.

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Dardas, Nasser Hasan Abdel-Qader. "Real-time Hand Gesture Detection and Recognition for Human Computer Interaction." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23499.

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This thesis focuses on bare hand gesture recognition by proposing a new architecture to solve the problem of real-time vision-based hand detection, tracking, and gesture recognition for interaction with an application via hand gestures. The first stage of our system allows detecting and tracking a bare hand in a cluttered background using face subtraction, skin detection and contour comparison. The second stage allows recognizing hand gestures using bag-of-features and multi-class Support Vector Machine (SVM) algorithms. Finally, a grammar has been developed to generate gesture commands for application control. Our hand gesture recognition system consists of two steps: offline training and online testing. In the training stage, after extracting the keypoints for every training image using the Scale Invariance Feature Transform (SIFT), a vector quantization technique will map keypoints from every training image into a unified dimensional histogram vector (bag-of-words) after K-means clustering. This histogram is treated as an input vector for a multi-class SVM to build the classifier. In the testing stage, for every frame captured from a webcam, the hand is detected using my algorithm. Then, the keypoints are extracted for every small image that contains the detected hand posture and fed into the cluster model to map them into a bag-of-words vector, which is fed into the multi-class SVM classifier to recognize the hand gesture. Another hand gesture recognition system was proposed using Principle Components Analysis (PCA). The most eigenvectors and weights of training images are determined. In the testing stage, the hand posture is detected for every frame using my algorithm. Then, the small image that contains the detected hand is projected onto the most eigenvectors of training images to form its test weights. Finally, the minimum Euclidean distance is determined among the test weights and the training weights of each training image to recognize the hand gesture. Two application of gesture-based interaction with a 3D gaming virtual environment were implemented. The exertion videogame makes use of a stationary bicycle as one of the main inputs for game playing. The user can control and direct left-right movement and shooting actions in the game by a set of hand gesture commands, while in the second game, the user can control and direct a helicopter over the city by a set of hand gesture commands.
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Jaishankar, Gayatri, and Deborah Thibeault. "Screen, Uncover, Connect: A Hands-on Approach to Elucidating the Social Determinants of Health." Digital Commons @ East Tennessee State University, 2017. https://dc.etsu.edu/etsu-works/8870.

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Shah, Purvi. "A PRIORITY-BASED RESOURCE MANAGEMENT APPROACH FOR DYNAMIC AND HARD MISSION CRITICAL REAL-TIME SYSTEMS." Ohio University / OhioLINK, 2005. http://www.ohiolink.edu/etd/view.cgi?ohiou1113835813.

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Gardom, James T. D. "The cross in time and the hidden hand of God : theology and the problem of evil, with reference to the work of Peter Forsyth and Austin Farrer." Thesis, King's College London (University of London), 1992. https://kclpure.kcl.ac.uk/portal/en/theses/the-cross-in-time-and-the-hidden-hand-of-god--theology-and-the-problem-of-evil-with-reference-to-the-work-of-peter-forsyth-and-austin-farrer(7e65f0e9-e6ba-4934-b811-1529681e5b52).html.

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Books on the topic "Hand off time"

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Kenney, Cindy. Cool Hand Cuke. Grand Rapids, MI: Zonderkidz, 2006.

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Nowicki, Dariusz. Gold medal mental workout.: A step-by-step program of mental exercises to make you a winner every time. Island Pond, VT: Stadion, 1993.

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Gold medal mental workout.: A step-by-step program of mental exercises to make you a winner every time. Island Pond, VT: Stadion, 1993.

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Hundeck, Markus. Welt und Zeit: Hans Blumenbergs Philosophie zwischen Schöpfungs- und Erlösungslehre. Würzburg: Echter, 2000.

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W, Ray Darryal, ed. In good hands. Huntsville: Albright, 1985.

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Hendricks, Darryll. Hot hands in mutual funds: The persistence of performance, 1974-87. Cambridge, MA: National Bureau of Economic Research, 1990.

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J, Rodriguez Luis. Hearts and Hands: Creating Community in Violent Times. New York, USA: Seven Stories Press, 2001.

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Hitler's personal pilot: The life and times of Hans Baur. Washington, DC: Brassey's, 2001.

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Trust, Bahá'í Publishing, ed. The unforgettable hands of the cause: Times with the chief stewards of Baha'u'llah's embryonic world commonwealth. New Delhi: Bahá'í Pub. Trust, 2008.

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Woodward, Michael. The unforgettable hands of the cause: Times with the chief stewards of Baha'u'llah's embryonic world commonwealth. New Delhi: Bahá'í Pub. Trust, 2008.

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Book chapters on the topic "Hand off time"

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Verhoosel, Jack. "Off-Line Scheduling of Hard Real-Time Distributed Systems Using Windows." In Real Time Computing, 741–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-88049-0_125.

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Rudolph, Lee. "Hard Times." In Contemporary Poetry: A Retrospective from the "Quarterly Review of Literature", edited by Theodore Russell Weiss, 555. Princeton: Princeton University Press, 2015. http://dx.doi.org/10.1515/9781400871728-181.

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Villata, Massimo. "Everything Had Ended Well." In The Dark Arrow of Time, 151–52. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-67486-5_18.

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Grzejszczak, Tomasz, Jakub Nalepa, and Michal Kawulok. "Real-Time Wrist Localization in Hand Silhouettes." In Proceedings of the 8th International Conference on Computer Recognition Systems CORES 2013, 439–49. Heidelberg: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00969-8_43.

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Pop, Paul, Petru Eles, and Zebo Peng. "Distributed Hard Real-Time Systems." In Analysis and Synthesis of Distributed Real-Time Embedded Systems, 41–62. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4020-2873-1_3.

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Kaufmann, Benoit, Jean Louchet, and Evelyne Lutton. "Hand Posture Recognition Using Real-Time Artificial Evolution." In Applications of Evolutionary Computation, 251–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-12239-2_26.

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Barreto, Raimundo, Paulo Maciel, Marília Neves, Eduardo Tavares, and Ricardo Lima. "A Novel Approach for Off-Line Multiprocessor Scheduling in Embedded Hard Real-Time Systems." In IFIP International Federation for Information Processing, 157–66. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/1-4020-8149-9_16.

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Höfler, Günther A. "Aposiopesen und Ellipsen." In Bewegungsszenarien der Moderne, 55–71. Heidelberg, Germany: Universitätsverlag WINTER, 2021. http://dx.doi.org/10.33675/2021-82537264-4.

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The article examines the rhetorical devices of aposiopesis (broken-off speech) and ellipsis (omission of words) in dramatic texts of the »Sturm und Drang« movement as well as in examples of 21st-century drama. The main focus is on what is spoken in the mode of ›silent language‹. The analysis of 18th-century dramatic texts (Lenz and Goethe) draws on the anthropological and poetological writings of the time, which show that the presence of the unspeakable in dramatic language is primarily a matter of the »excitation of the soul« (Herder). In contemporary drama, on the other hand, no generalisable function for the abruption of speech or the effect of standing still can be determined; the lack of movement in these dramatic texts serves to highlight alienated human relationships (Thomas Arzt) and displays existential dissolutions of meaning (Ewald Palmetshofer).
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Fraser, James W. "Hope in Hard Times." In A History of Hope, 215–48. New York: Palgrave Macmillan US, 2004. http://dx.doi.org/10.1007/978-1-137-09784-2_10.

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Villata, Massimo. "A Sort of Autumn Had Arrived." In The Dark Arrow of Time, 59–70. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-67486-5_7.

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Conference papers on the topic "Hand off time"

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Cognolato, Matteo, Lorenzo Brigato, Yashin Dicente Cid, Manfredo Atzori, and Henning Muller. "Analyzing the Trade-Off Between Training Session Time and Performance in Myoelectric Hand Gesture Recognition During Upper Limb Movement." In 2019 IEEE 16th International Conference on Rehabilitation Robotics (ICORR). IEEE, 2019. http://dx.doi.org/10.1109/icorr.2019.8779535.

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Ottosson, Hans J., Thomas A. Naylor, Oliver K. Johnson, and Christopher A. Mattson. "Establishing Baseline Performance for Off-the-Shelf Nitrile Seals for the India Mark II Hand Pump System." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-98439.

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Abstract Accessing clean water is a persistent, and life threatening, challenge for millions of people in the world. Mechanical hand pumps have a long history of helping people access clean ground water for drinking and daily use. Among the most ubiquitous are the India Mark II and III pump systems, for which there are more than 4,000,000 installed across the world. These are estimated to serve between 600M and 1B people. All pumps degrade in performance over time, requiring service; many do not receive it causing pumps to become dysfunctional. The purpose of this paper is to establish a baseline for nitrile seal performance of India Mark II hand pump systems. Understanding off-the-shelf performance and using it as a baseline is an important step toward understanding degradation of performance over time, which is the focus of a much larger study to understand — mechanically and socially — how hand pumps perform, degrade, and ultimately meet human needs. In this paper, 110 off-the-shelf nitrile seals that were purchased in Uganda were tested and the following was characterized: (i) geometric variation, (ii) material variation, (iii) leak performance, and (iv) correlation between these. The seal leak performance was found to be very robust to variations in geometry and material at zero cycles. This important baseline supports our future work to understand how and to what degree seals become sensitive to geometric and material degradation during use.
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Alves, Maicon, Lúcia Maria Drummond, and Reynam Pestana. "Accelerating Pre-stack Kirchhoff Time Migration by using SIMD Vector Instructions." In XVI Simpósio em Sistemas Computacionais de Alto Desempenho. Sociedade Brasileira de Computação - SBC, 2015. http://dx.doi.org/10.5753/wscad.2015.14267.

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The Pre-stack Kirchhoff Time Migration (PKTM) is a central process in petroleum exploration. As PKTM is computationally intensive, many works have proposed the use of accelerators like GPU and FPGA to improve its execution time. On the other hand, although many off-the-shelf processors are endowed with a set of SIMD vector instructions, few papers tackle the problem considering vectorization and, all of them, consider that compilers can successfully vectorize the code. In this paper, we show that a hand-written Kirchhoff code by using SIMD vector instructions is more efficient than the autovectorized code provided by GCC. Experiments considering both real and synthetic datasets showed that our solution is up to eight times faster than the autovectorized one. We believe that the proposed strategy can be used together with the other ones to accelerate seismic migration methods in general without new investments in hardware and software.
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Feist, J. P., S. Karmaker Biswas, C. Pilgrim, P. Y. Sollazzo, and S. Berthier. "Off-Line Temperature Profiling Utilising Phosphorescent Thermal History Paints and Coatings." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25939.

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Temperature profiling of components in gas turbines is of increasing importance as engineers drive to increase firing temperatures and optimise component’s cooling requirements in order to increase efficiency and lower CO2 emissions. However, on-line temperature measurements and, particularly, temperature profiling are difficult, sometimes impossible, to perform due to inaccessibility of the components. A desirable alternative would be to record the exposure temperature in such a way that it can be determined later, off-line. The commercially available Thermal Paints are toxic in nature and come with a range of technical disadvantages such as subjective readout and limited durability. This paper proposes a novel alternative measurement technique which the authors call Thermal History Paints and Thermal History Coatings. These can be particularly useful in the design process, but further could provide benefits in the maintenance area where hotspots which occurred during operation can be detected during maintenance intervals when the engine is at ambient temperature. This novel temperature profiling technique uses optical active ions in a ceramic host material. When these ions are excited by light they start to phosphoresce. The host material undergoes irreversible changes when exposed to elevated temperatures and since these changes are on the atomic level they influence the phosphorescent properties such as the life time decay of the phosphorescence. The changes in phosphorescence can be related to temperature through calibration such that in-situ analysis will return the temperature experienced by the coating. A major benefit of this technique is in the automated interpretation of the coatings. An electronic instrument is used to measure the phosphorescence signal eliminating the need for a specialist interpreter and thus increasing readout speed. This paper reviews results from temperature measurements made with a water based paint for the temperature range 100°C to 800°C in controlled conditions. Repeatability of the tests and errors will be discussed. Further, some measurements are carried out using an electronic hand-held interrogation device which can scan a component surface and provide a spatial resolution of below 3mm. The instrument enables mobile measurements outside of laboratory conditions. Further a robust Thermal History Coating is introduced demonstrating the capability of the coating to withstand long term exposures. The coating is based on Thermal Barrier Coating architecture with a high temperature bondcoat and deposited using an air plasma spray process to manufacture a reliable long lasting coating. Such a coating could be employed over the life of the component to provide critical temperature information at regular maintenance intervals for example indicating hot spots on engine parts.
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Hou, Yucheng, Jiabei Yuan, Yanqiu Zhang, Zhimin Tan, and Terry Sheldrake. "Direct Hang-Off Model to Evaluate Fatigue Damage at Riser Hang-Off." In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10847.

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Fatigue damage assessment at the flexible riser hang-off location, where the pipe frequently endures maximum tension and curvature variations, is key to verify design integrity for service life. Traditionally, the fatigue analysis is performed in a separate local structure model, as the commercial global analysis software lacks the capability of handling the local behavior of the riser structural component, which is dependent on materials and manufacturing processes. During global fatigue analysis, the riser configuration is built with pinned connected at the hang-off point. The resulting tension and angle responses at the hang-off location, are then input to a local model to perform the stress and fatigue analysis, where the detailed pipe layer structure and bend stiffener are modeled. This traditional approach is conservative, time costly and is often limited to regular wave approach. Wellstream developed an external function to work with specialized commercial riser dynamic analysis software. The external function simulates the detailed behaviour of flexible pipe structure components and the resulting bending hysteresis during dynamic simulation in the time domain. Therefore, the stress time history of the tensile armour becomes available at the end of global simulation in the time domain and is ready for fatigue damage assessment by rain flow counting. This paper presents a study case where the fatigue assessment is performed directly at the hang-off region within the riser global dynamic simulation. The riser hang-off is situated at the top of the I-tube and a bend stiffener is fixed at the bottom of the I-tube. I-tube and pipe section are precisely modeled as pipe-in-pipe facility, where the interaction of riser/I-tube can be captured.
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Zoric, T., I. Popovic, S. A. Sjolander, T. Praisner, and E. Grover. "Comparative Investigation of Three Highly Loaded LP Turbine Airfoils: Part II — Measured Profile and Secondary Losses at Off-Design Incidence." In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-27538.

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The first part of the paper compared the midspan aerodynamics and the secondary flows for a family of three low-pressure turbine (LPT) airfoils at design conditions. However, since a typical engine spends much of its time operating at off-design conditions, good tolerance of LPT airfoils to off-design operation is desired. The sensitivity of the midspan flow to Reynolds number was examined for the three airfoils in a paper presented at the 2006 ASME-IGTI Turbo-Expo. The present paper examines the performance of the airfoils for three values of incidence: −5, 0, and +5 degrees relative to design. Both the profile and secondary losses are considered. Detailed loading distributions measured at midspan are used to explain the behaviour of the profile flow and the resulting change in losses as the incidence was varied. The secondary flow behaviour is determined as at the design incidence from detailed flowfield measurements made downstream of the trailing edge using a seven-hole pressure probe. The results show that in terms of profile losses the baseline airfoil (which has a Zweifel coefficient Z = 1.08) and the front-loaded one with Z = 1.37 have comparable losses over the range of incidences examined. However, the aft-loaded airfoil with Z = 1.37 had noticeably higher profile losses than the other two. On the other hand, the front-loaded one has higher secondary losses than its aft-loaded counterpart at all conditions examined. This obviously poses a dilemma for the designer in terms of the choice of loading distribution. It was also noted that the distribution of loading seems to affect the secondary losses more than the loading level (Zweifel coefficient). An interaction of the secondary flows with the suction side separation bubble might be responsible in part for this finding.
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Lauer, Martin, Jens Färber, Frank Reiß, and Jaman El Masalme. "Model Based Prediction of Off-Design Operation Condition NOx Emission From DLE Gas Turbine Combustors." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-63063.

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In this paper a semi-empirical method is presented to predict the NOX emission of a pilot stabilized, technically premixed gas turbine combustor for arbitrary combustor inlet conditions. The method is based on measurement data for a reference operation cycle and ISO ambient condition. A model based correction function is used to account for the change of NOX emission, which results from combustor inlet condition and/or operation cycle deviating from reference data. The proposed method assumes that a pilot stabilized, technically premixed flame can be simplistically modeled as two separate combustion regimes: An assumed perfectly premixed regime, and an assumed diffusion flame regime. The emission of the combustor is then modeled as a superposition of the emissions from both individual combustion regimes. The emissions from the diffusion flame regime are the dominant contribution, although only a comparably small share of fuel is burnt in this regime. The emission of the perfectly premixed combustion regime can be modeled as a sole function of flame temperature. On the other hand, the emissions from the diffusion regime are strongly affected by combustor inlet pressure and temperature, which are in turn a function of the gas turbine operation cycle and inlet conditions. To simplify matters, only the change in NOX emission from the diffusion regime, which results from deviation of combustor inlet pressure and/or temperature from values expected for a reference operation cycle and ISO ambient condition, is modeled. NOX emission data for this reference operation cycle is necessary experimental input for the method. The proposed method can — with minimum experimental input — predict the NOX emission of a pilot stabilized, technically premixed combustor with good accuracy for arbitrary engine operation cycles and inlet conditions. It is aimed at providing reliable NOX emission estimates without the need for time intensive CFD or expensive experimental investigations. Typical applications are the assessment of a gas turbine’s NOX potential for feasibility studies of new operation or engine concepts with a proven combustor design, and for NOX estimates for out-of-experience ambient or site conditions for existing engines.
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Ikeda, Takuya, and Masaaki Nagahara. "Maximum hands-off control with time-space sparsity." In 2021 American Control Conference (ACC). IEEE, 2021. http://dx.doi.org/10.23919/acc50511.2021.9483261.

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Kishida, Masako, Masaaki Nagahara, and Debasish Chatterjee. "Discrete-time Maximum Hands-Off Control with Minimum Switches." In 2019 IEEE 58th Conference on Decision and Control (CDC). IEEE, 2019. http://dx.doi.org/10.1109/cdc40024.2019.9029568.

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Kumar, Y., S. Srikant, M. Nagahara, D. Chatterjee, and D. E. Quevedo. "Maximum hands-off feedback control for finite-time stabilization*." In 2020 59th IEEE Conference on Decision and Control (CDC). IEEE, 2020. http://dx.doi.org/10.1109/cdc42340.2020.9304419.

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Reports on the topic "Hand off time"

1

Stankovic, John A., and Krithi Ramamritham. SPRINGNET: A Network of Multiprocessors for Hard Real-Time. Fort Belvoir, VA: Defense Technical Information Center, October 1988. http://dx.doi.org/10.21236/ada203348.

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Sperling, J. L., P. G. Coakley, and N. C. Wild. Laboratory Simulation of Plasma Structure in Later-Time HANE Plasmas. Fort Belvoir, VA: Defense Technical Information Center, February 1986. http://dx.doi.org/10.21236/ada170627.

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Dill, David. Automatic Verification and Synthesis of Finite-State Hard Real-Time Systems. Fort Belvoir, VA: Defense Technical Information Center, May 1994. http://dx.doi.org/10.21236/ada291279.

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Lee, Yuh-Jeng, and Valdis Berzins. Systematic Development of Hard Real-Time Software: A Comparative Study of Three Methods. Fort Belvoir, VA: Defense Technical Information Center, April 1992. http://dx.doi.org/10.21236/ada252784.

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Shaw, Alan C. Specifying, Predicting, and Verifying the Timing Properties of Hard- Real-Time Programming Languages and Systems. Fort Belvoir, VA: Defense Technical Information Center, June 1992. http://dx.doi.org/10.21236/ada257296.

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Unterhalter, Elaine. Education policy in hard times : the politics of gender, justice and hope. Unknown, 2016. http://dx.doi.org/10.35648/20.500.12413/11781/ii060.

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Schaller, Jessamyn, and Chase Eck. Family Support in Hard Times: Dynamics of Intergenerational Exchange after Adverse Events. Cambridge, MA: National Bureau of Economic Research, December 2020. http://dx.doi.org/10.3386/w28295.

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Swaminathan, Vishnu, and Krishnendu Chakrabarty. Investigating the Effect of Voltage-Switching on Low-Energy Task Scheduling in Hard Real-Time Systems. Fort Belvoir, VA: Defense Technical Information Center, January 2005. http://dx.doi.org/10.21236/ada440180.

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Rohwerder, Brigitte, Josephine Njungi, Mary Wickenden, Stephen Thompson, and Jackie Shaw. “This Time of Corona Has Been Hard”: People with Disabilities’ Experiences of the COVID-19 Pandemic in Kenya. Institute of Development Studies (IDS), May 2021. http://dx.doi.org/10.19088/if.2021.005.

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The COVID-19 pandemic is deepening pre-existing inequalities. Emerging research suggests that people with disabilities across the world have experienced various rights violations and been disproportionality affected by the health, economic and social impacts of the COVID-19 pandemic and the responses to it. The aim of this research was to explore how people with disabilities, who often are excluded from research, have experienced the evolving COVID-19 pandemic in Kenya. To better understand how it has affected jobseekers with disabilities, in-depth qualitative research was conducted in Kenya as part of the Inclusion Works programme.
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Rohwerder, Brigitte, Rohwerder, Brigitte, Josephine Njungi, Mary Wickenden, Stephen Thompson, and Jackie Shaw. “This Time of Corona Has Been Hard”: People with Disabilities’ Experiences of the COVID-19 Pandemic in Kenya. Institute of Development Studies (IDS), May 2021. http://dx.doi.org/10.19088/if.2021.004.

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The COVID-19 pandemic is deepening pre-existing inequalities. Emerging research suggests that people with disabilities across the world have experienced various rights violations and been disproportionality affected by the health, economic and social impacts of the COVID-19 pandemic and the responses to it. The aim of this research was to explore how people with disabilities, who often are excluded from research, have experienced the evolving COVID-19 pandemic in Kenya. To better understand how it has affected jobseekers with disabilities, in-depth qualitative research was conducted in Kenya as part of the Inclusion Works programme.
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