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Letteratura scientifica selezionata sul tema "Loss of control events"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 5 febbraio 2022

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Articoli di riviste sul tema "Loss of control events"

Hess, Ronald A. "A model for pilot control behavior in analyzing potential loss-of-control events". Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 228, n. 10 (8 aprile 2014): 1845–56. http://dx.doi.org/10.1177/0954410014531218.

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Ud-Din, Sameer, e Yoonjin Yoon. "Analysis of Loss of Control Parameters for Aircraft Maneuvering in General Aviation". Journal of Advanced Transportation 2018 (2018): 1–19. http://dx.doi.org/10.1155/2018/7865362.

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Abstract (sommario):

A rapid increase in the occurrence of loss of control in general aviation has raised concern in recent years. Loss of control (LOC) pertains to unique characteristics in which external and internal events act in conjunction. The Federal Aviation Administration (FAA) has approved an Integrated Safety Assessment Model (ISAM) for evaluating safety in the National Airspace System (NAS). ISAM consists of an event sequence diagram (ESD) with fault trees containing numerous parameters, which is recognized as casual risk model. In this paper, we outline an integrated risk assessment framework to model maneuvering through cross-examining external and internal events. The maneuvering is in the critical flight phase with a high number of LOC occurrences in general aviation, where highly trained and qualified pilots failed to maintain aircraft control irrespective of the preventive nature of the events. Various metrics have been presented for evaluating the significance of these parameters to identify the most important ones. The proposed sensitivity analysis considers the accident, fatality, and risk reduction frequencies that assist in the decision-making process and foresees future risks from a general aviation perspective.

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Milosavljevic, Stephan, David I. McBride, Nasser Bagheri, Radivoj M. Vasiljev, Allan B. Carman, Borje Rehn e Dave Moore. "Factors associated with quad bike loss of control events in agriculture". International Journal of Industrial Ergonomics 41, n. 3 (maggio 2011): 317–21. http://dx.doi.org/10.1016/j.ergon.2011.02.010.

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Volkanovski, Andrija, e Miguel Peinador Veira. "Analysis of Loss of Essential Power System Reported in Nuclear Power Plants". Science and Technology of Nuclear Installations 2018 (9 luglio 2018): 1–21. http://dx.doi.org/10.1155/2018/3671640.

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The essential power supply system is important for the nuclear safety and accident mitigation of the currently operating nuclear power plants. This system provides electrical power to the essential instrumentation and control systems of the nuclear power plant when all alternate current power sources are lost. This event is known as station blackout (SBO) event. Operational events of failure or deficiency of the essential power supply system are analyzed in this paper. The relevant events were searched and identified in four databases of operational events. The report includes events identified in French SAPIDE and German VERA operational events records for the time period 1996 to 2015. The International Atomic Energy Agency (IAEA) IRS and Nuclear Regulatory Commission (NRC) LER operational events databases were screened for relevant events that occurred in the period between 2000 and 2016. In total, 308 relevant events are identified in the SAPIDE, 103 in VERA, 56 in LER, and 15 in IRS operational events database. Classification and in-depth analysis were done on the identified events considering the following predefined categories: the plant status during the event, circumstances, affected equipment, cause of the event (direct and root), and implications of the event on plant safety. Main findings from the evaluation of the events are presented. Observations of the causes resulting in the events and potential actions that can decrease the number and consequences of the events are presented.

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Rheinberger, C. M., H. E. Romang e M. Bründl. "Proportional loss functions for debris flow events". Natural Hazards and Earth System Sciences 13, n. 8 (30 agosto 2013): 2147–56. http://dx.doi.org/10.5194/nhess-13-2147-2013.

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Abstract. Quantitative risk assessments of debris flows and other hydrogeological hazards require the analyst to predict damage potentials. A common way to do so is by use of proportional loss functions. In this paper, we analyze a uniquely rich dataset of 132 buildings that were damaged in one of five large debris flow events in Switzerland. Using the double generalized linear model, we estimate proportional loss functions that may be used for various prediction purposes including hazard mapping, landscape planning, and insurance pricing. Unlike earlier analyses, we control for confounding effects of building characteristics, site specifics, and process intensities as well as for overdispersion in the data. Our results suggest that process intensity parameters are the most meaningful predictors of proportional loss sizes. Cross-validation tests suggest that the mean absolute prediction errors of our models are in the range of 11%, underpinning the accurateness of the approach.

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Thomas, B. J., e R. Rothstein. "The genetic control of direct-repeat recombination in Saccharomyces: the effect of rad52 and rad1 on mitotic recombination at GAL10, a transcriptionally regulated gene." Genetics 123, n. 4 (1 dicembre 1989): 725–38. http://dx.doi.org/10.1093/genetics/123.4.725.

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Abstract We have previously shown direct-repeat recombination events leading to loss of a plasmid integrated at the GAL10 locus in Saccharomyces cerevisiae are stimulated by transcription of the region. We have examined the role of two recombination- and repair-defective mutations, rad1 and rad52, on direct repeat recombination in transcriptionally active and inactive sequences. We show that the RAD52 gene is required for transcription-stimulated recombination events leading to loss of the integrated plasmid. Similarly, Gal+ events between the duplicated repeats that retain the integrated plasmid DNA (Gal+ Ura+ replacement events) are reduced 20-fold in the rad52 mutant in sequences that are constitutively expressed. In contrast, in sequences that are not expressed, the rad52 mutation reduces plasmid loss events by only twofold and Gal+ Ura+ replacements by fourfold. We also observe an increase in disome-associated plasmid loss events in the rad52 mutant, indicative of chromosome gain. This event is not affected by expression of the region. Plasmid loss events in rad1 mutant strains are reduced only twofold in transcriptionally active sequences and are not affected in sequences that are repressed. However, the rad1 and rad52 double mutant shows a decrease in plasmid loss events greater than the sum of the decreases in the rates of this event displayed by either single mutant in both constitutive and repressed DNA, indicating a synergistic interaction between these two genes. The synergism is limited to recombination since the rad1 rad52 double mutant is no more sensitive when compared with either single mutant in its ability to survive radiation damage. Finally, the recombination pathway that remains in the double mutant is positively affected by transcription of the region.

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Clay, Lynne, Gareth J. Treharne, E. Jean C. Hay-Smith e Stephan Milosavljevic. "Are agricultural quad bike loss-of-control events driven by unrealistic optimism?" Safety Science 66 (luglio 2014): 54–60. http://dx.doi.org/10.1016/j.ssci.2014.02.002.

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Yao, Li, Yongfeng Li, Zhaoqiang Qian, Meilin Wu, Haifan Yang, Naijia Chen, Yanning Qiao et al. "Loss of control over mild aversive events produces significant helplessness in mice". Behavioural Brain Research 376 (dicembre 2019): 112173. http://dx.doi.org/10.1016/j.bbr.2019.112173.

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Rohith, G., e Nandan K. Sinha. "Improved pilot training via bifurcation analysis and robust control for aircraft loss of control problems". Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, n. 14 (8 maggio 2019): 5414–27. http://dx.doi.org/10.1177/0954410019846434.

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Aircraft loss of control is one of the largest contributors to fatal accidents in the aviation environment. The unprecedented change in aircraft dynamics due to loss of control onset and the associated structural constraints make loss of control prevention and/or recovery a challenging task. State-of-the-art autopilots are generally designed for nominal aircraft operations and disengage under off-nominal conditions, hence cannot be viewed as a safety solution during loss of control onsets. Herein lies the importance of providing training to pilots so as to equip themselves to rescue aircraft from loss of control events. Current pilot training methodologies have significant limitations when it comes to loss of control prevention and recovery strategies. In this context, a simulator for improved pilot training based on bifurcation and continuation techniques is presented in the paper. Augmenting these techniques with the current pilot training procedure can significantly improve the quality of training. This methodology can help pilots to distinguish various loss of control scenarios and aid them in taking appropriate recovery decisions intuitively. Meanwhile, a robust control-based loss of control handling module is also presented for developing non-intuitive strategies for loss of control prevention and recovery. This module can simulate adequate control profiles that the pilot can follow to get in and out of various loss of control scenarios. Moreover, it can be used as pilot activated recovery system in case of pilot disorientation and as a fully autonomous recovery system for much complex scenarios. The simulator is developed in MATLAB/SIMULINK platform and is shown to realize diverse loss of control events like spiral, spin, etc., and subsequent recovery from the same.

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FARMER, ANNE E., e PETER McGUFFIN. "Humiliation, loss and other types of life events and difficulties: a comparison of depressed subjects, healthy controls and their siblings". Psychological Medicine 33, n. 7 (25 settembre 2003): 1169–75. http://dx.doi.org/10.1017/s0033291703008419.

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Background. It has been proposed that adverse life events involving loss or humiliation are particularly potent in provoking depressive episodes. We have also previously suggested that experiencing high rates of non-severe events may play a role in the development of resilience to the impact of severe threatening events when these occur.Method. The Life Events and Difficulties Schedule (LEDS) (Brown & Harris, 1978) was used to record the life events experienced by 108 depressed probands and their nearest aged siblings as well as 105 healthy control subjects and their nearest aged siblings. All subjects were interviewed using the Schedule for the Clinical Assessment of Neuropsychiatry (SCAN) (Wing et al. 1990).Results. Depressed probands were significantly more likely to have experienced a severe threatening event, loss event, or a humiliation event compared to the other subjects. These events also made up a greater proportion of the total number of events, in the depressed probands. Humiliation events were more frequent in depressed men than depressed women. There were no differences between the four groups for experiencing a non-severe event, although depressed probands also experienced more difficulties than the other three groups. Fifty-six healthy subjects who had not become depressed despite having experienced at least one severe and threatening event, had significantly more non-severe events, than the 116 subjects who were depressed at the time of interview.Conclusions. The findings support the hypothesis that loss and humiliation events are particularly depressogenic. Experiencing a high rate of non-severe events may be associated with resilience to becoming depressed in the face of a threatening event.

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Tesi sul tema "Loss of control events"

Rivas, Reguera José Carlos. "Development of AINA code for the study of loss of plasma control events in ITER and DEMO, and contribution to the systems study of DEMO". Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/392607.

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Magnetic fusion is a long term, worldwide research activity. Plans are increasingly ambitious, cooperation is progressing, and goals seem to be closer every year. ITER reactor is being built, and several conceptual studies are being developed around the world for the design of a DEMO power plant. A central goal of ITER is to demonstrate the safety and environmental potential of fusion as an energy source. ITER Safety studies have developed a technical safety basis for safety in nuclear fusion. DEMO safety studies take benefit from the ITER experience. In the context of safety studies for ITER and DEMO devices, AINA code is used for the calculation of plasma-wall transients and its consequences for in-vessel components. The work of this thesis has consisted basically on the development of AINA code, from the initial existing version, and the safety studies performed with the code. Additionally, systems studies were performed in the frame of Tecno_FUS program. Also several small codes were developed in support of AINA calculations: - SimSched, simulation scheduler, is an Excel macro for automating calculations with AINA code. It allows making large series of simulations without supervision, increasing productivity. - Code in Matlab for calculation of view factors of arbitrary toroidal geometries, useful for configuring AINA code. - Montecarlo code for the calculation of neutron wall loading from a plasma source. - Python script for parametric studies with PROCESS code. - Python script for optimisation studies with AINA code. The following studies have been performed: - Study of passive plasma termination for beryllium evaporation during and ex-vessel LOCA transient in ITER: the ITER reference case has been studied again, with similar results to those obtained in the past. A sensitivity study was done showing that wall surface in contact with plasma could melt before the end of plasma discharge. - Study of Loss of Plasma Control transients in ITER: it has been shown that parametric scan method is not appropriate to find the most severe plasma transients. An optimisation method has been proposed to substitute it. The behavior of plasma transients inside the plasma operation window was investigated, including the effect of two simultaneous perturbations. - Safety studies for Japanese DEMO, considering plasma perturbations or thermohydraulic accidents and assuming loss of plasma control: methodology for safety studies has been improved. The result of this research is useful for Japanese DEMO research program, as it gives information about the recovery time for plasma control system. - Contribution to systems analysis to obtain optimal plasma configurations for Tecno_FUS research programme: In the frame of this project, sensitivity studies were performed with the systems code PROCESS, and a Montecarlo code was developed for the calculation of poloidal neutron wall loading for an arbitrary toroidal geometry. Results were compared with the case of ITER. As a final conclusion, this work represents an important consolidation of the research line of AINA project.
La fusión magnética ha sido y es una actividad de investigación a escala mundial y a muy largo plazo. Los objetivos son cada vez más ambiciosos, la cooperación cada vez mayor, y los objetivos parecen cada vez más cercanos. El reactor ITER se está construyendo, y varios estudios conceptuales se están desarrollando en todo el mundo para el diseño de una central de fusión nuclear conectada a la red, DEMO. Un objetivo central de ITER es demostrar el potencial de seguridad y respeto al medio ambiente de la fusión como fuente de energía. Los estudios de seguridad de ITER han desarrollado una base técnica para los estudios de seguridad en fusión nuclear. Los estudios de seguridad para DEMO se están basando actualmente en la experiencia de ITER. En el contexto de los estudios de seguridad para ITER y DEMO, el código AINA se utiliza para el cálculo de los transitorios plasma-pared y el estudio de sus consecuencias térmicas para los componentes instalados dentro de la vasija del reactor. El trabajo de esta tesis ha consistido principalmente en el desarrollo del código AINA, desde su versión inicial preexistente, y los estudios de seguridad realizados con el código. También se realizaron estudios de sistemas en el marco del programa de Tecno_FUS . Además, varios códigos de pequeña extensión se desarrollaron para apoyar el trabajo con el código AINA: - SimSched, planificador de la simulación, es una macro de Excel para automatizar los cálculos con el código de AINA. Permite hacer grandes series de simulaciones sin supervisión, lo que aumenta la productividad. - Código en Matlab para el cálculo de los factores de vista de geometrías toroidales arbitrarias, útil para configurar código AINA. - Código de Montecarlo para el cálculo de la carga neutrónica que cruza la superficie de los elementos en contacto con el plasma. - Código en lenguaje Python para estudios paramétricos con el código de sistemas PROCESS. - Código en lenguaje Python para estudios de optimización con el código AINA. Se han realizado los siguientes estudios: - Estudio del apagado pasivo del plasma por evaporación de berilio durante un accidente de pérdida de refrigerante fuera de la vasija del plasma en ITER: se ha repetido el estudio del caso de referencia, con resultados similares a los obtenidos en el pasado. Se ha realizado un estudio de sensibilidad que ha mostrado que la superficie de la pared en contacto con el plasma puede llegar a fundirse antes del fin de la descarga. - Estudio de transitorios de pérdida de control del plasma en ITER: se ha demostrado que el método de exploración paramétrica no es apropiado para encontrar los transitorios de plasma más graves. Un método de optimización se ha propuesto para sustituirlo. Se ha investigado el comportamiento de los transitorios dentro de la ventana de operación del plasma incluyendo combinaciones simultáneas de dos perturbaciones. - Estudios de seguridad para el diseño DEMO japonés, teniendo en cuenta las perturbaciones del plasma o accidentes termohidráulicos y asumiendo la pérdida de control del plasma: la metodología para los estudios de seguridad ha sido mejorada. El resultado de esta investigación es útil para el programa de investigación DEMO japonés, ya que da información sobre el tiempo de recuperación máximo para el sistema de control de plasma. - Contribución al análisis de sistemas para dar configuraciones óptimas de plasma para el proyecto Tecno_FUS: Dentro de esta actividad se realizaron estudios paramétricos con el código de sistemas PROCESS, y se desarrolló un código de Montecarlo para calcular la carga neutrónica que cruza la superficie de los elementos en contacto con el plasma para una geometría toroidal arbitraria, y comparación con resultados de ITER. El balance final en cuanto al proyecto AINA, es que este trabajo representa una consolidación importante de esta línea de investigación.

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Breazeale, Dorothy Elizabeth. "Extinction Events". Bowling Green State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1427876606.

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Merkouris, Katherine Maria. "Decidual inflammatory events associated with early embryo loss". Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=30704.

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The maternal immune system exerts a key role in determining the outcome of mammalian pregnancy. It has been proposed that the high rate of early embryo loss (20--30%) in DBA/2-mated CBA/J female mice may be the consequence of a maternal non-speck immune rejection response to the allogeneic conceptus. Early embryo resorption in mice has been associated with the activation of natural killer like cells, macrophages, and production of TH1 inflammatory cytokines. To investigate and detect the earliest events in the activation of decidual NK cells and macrophages in initiating early embryo loss, gene expression analysis of two NK cell molecular markers, IFNgamma and perforin mRNA, and two macrophage specific cytokines, TNFalpha and NOS mRNA, was performed. Since IFNgamma is also produced by CD4+ T cells, cell labeling with an anti-NK antibody (DX5), cell sorting, and RT-PCR gene expression analysis were performed to confirm the source of IFNgamma mRNA in the decidua and spleen of DBA/2-mated CBA/J female. The role of the innate response during implantation, normal pregnancy, and early pregnancy loss will be discussed. (Abstract shortened by UMI.)

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Merkouris, Katherine Maria. "Decidual inflammatory events associated with early embryo loss". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0029/MQ64408.pdf.

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Bostander, D. E. "Operational risk events in banks and practices for collecting internal loss data". Thesis, University of South Africa, 2007. http://hdl.handle.net/10500/137.

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This research study had two distinct objectives. The first objective was to determine in which areas in South African banks the most severe operational risk losses are likely to occur (based on the Basel II seven loss event types and eight business lines). Severity was assessed based on single operational risk events that might have significant monetary values attached to them. The likely frequency of single operational risk events was also assessed. The investigation of the aforementioned research problem was explorative and quantitative of nature, as the researcher made extensive use of survey research in the form of a questionnaire to all registered banks. The second part of the research study’s objective was to assess the range of practices in collecting internal loss data for operational risk purposes as required by Basel II. This part was approached from a qualitative perspective, by benchmarking the research findings against the Basel II text, the researcher’s experience in risk management in banks, the Basel Committee on Banking Supervision’s Sound Practices for the Management and Supervision of Operational Risk, and related literature. The literature review, including reference to certain surveys and studies, focuses on the main concepts of operational risk within banks that are pertinent to the research problem. The literature review also includes several references to the Basel II text and other relevant publications and papers issued by the Basel Committee on Banking Supervision. The research results revealed that respondents in South African banks believed that ‘business disruption and system failures’ is the loss event type that is likely to result in the most severe single operational risk loss. ‘Trading and sales’ scored the same high average rating as ‘business disruption and system failures’ as the business line where the most severe single operational risk loss is likely to occur in South African banks. ‘External fraud’ and ‘execution, delivery and process management’ scored the highest average ratings as the loss event types where the most frequent operational risk losses are likely to occur. Respondents indicated that ‘retail banking’ is the business line where the most frequent single operational risk losses are likely to occur in South African banks. Based on the above-mentioned findings the researcher recommends that these high-risk areas be highlighted to the Bank Supervision Department of the South African Reserve Bank, the boards of directors and senior management of banks in order for them to strengthen banks’ internal controls. The researcher recommends the inclusion of near misses and opportunity cost in operational risk loss databases. Banks should at least capture the date of the discovery of an operational risk event as this represents acceptable practice among the majority of banks. Operational risk losses should be assigned to the multiple business activities in which it occurred on a pro-rata basis. All recoveries of operational risk losses should be processed separately, but associated with the original loss event. Replacement cost is seen as the most appropriate way to capture gross loss amounts for the damage to fixed assets. The researcher encourages the recording of overtime cost for fixing systems failures. Market risk losses due to operational risk events should be treated as market risk losses, while loan-related losses due to operational risk failures should be treated as credit risk losses by banks. The researcher’s view is that banks should set different thresholds for the collection of operational risk losses for its various business units based on each business unit’s operations and nature of business. Banks should, as a starting point, map operational risk events to the Basel II 8x7 matrix. Operational risk losses should be assessed by both legal entity and on a consolidated basis.

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Galuzio, Paulo Paneque. "Intermittent turbulence, extreme events and control techniques". reponame:Repositório Institucional da UFPR, 2016. http://hdl.handle.net/1884/43138.

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Orientador: Prof. Dr. Sergio Roberto Lopes
Tese (doutorado) - Universidade Federal do Paraná, Setor de Ciências Exatas, Curso de Pós-Graduação em Física. Defesa: Curitiba,22/02/2016
Inclui referências : f. 68-77
Resumo: A compreensão dos mecanismos dinâmicos que levam à formação de estados turbulentos em sistemas dinâmicos espacialmente estendidos constituem um dos maiores problemas da física matemática contemporânea. Observa-se que frequentemente estas transições acontecem de maneira intermitente, i.e, a dinâmica alterna de uma maneira aparentemente irregular entre estados de caos temporal e turbulentos. O estudo do início intermitente da turbulência é ainda mais importante se consideramos a aplicação em potencial na compreensão de sistemas que apresentam eventos extremos em suas evoluções temporais, há uma semelhação notável no comportamento dinâmicos de sistemas com eventos extremos e intermitência em sistemas espac ialmente estendidos. Neste trabalho, estudamos uma transição de um estado laminar para aos temporal para turbulência, que acontece de maneira intermitente, na equação de Shrödinger não-linear unidimensional forçada e amortecida. Este modelo representa vários problemas físicos distintos, particularmente oferece uma descrição precisa da dinâmica de envelope de ondas em um meio levemente não-linear, dispersivo e conservativo. As propriedades estatísticas da série temporal da energia da onda sugere que a transição acontece de acordo com um mecânismo dinâmico conhecido na literatura, que se chama intermitência co- induzida por variabilidade da dimensão instável. A análise posterior das distribuições dos expoentes de Lyapunov a tempo finito confirma que a perda de estabilidade transversal de um atrator caótico de baixa dimensionalidade, imerso no espaço de fase de Fourier, é de fato o mecânismo subjacente à intermitência, e portanto leva o sistema ao estado turbulento. Especificamente para o modelo estudado, o aumento da amplitude de forçamento induz a perda de estabilidade transversal de um atrator de baixa energia, o que leva a emergência de intermitência no sistema, e posteriormente turbulência. Adicionalmente, foi possível decompor a dinâmica nos chamados modos longitudinais, mistos e transversais. Posteriormente, mapeamos de maneira aproximada as regiões de instabilidade transversal máxima no atrator caótico de baixa dimensionalidade, e então perturbamos o sistema para inibir a ocorrência de eventos extremos intermitentes.
Abstract: The understanding of the dynamical mechanisms that lead to the formation of turbulent states in spatially extended dynamical systems constitutes a major problem in modern mathematical physics. It is observed that often these transitions o ur intermittently, i.e., the dynamics shifts in a seemingly random way between states of temporal chaos and turbulent states. The study of intermittent onset of turbulence is even more important if we consider the potential application in the understanding of systems that possess extreme events in their temporal evolution, there is a great resemblance in the behavior of extreme events dynamics and intermittent spatially extended systems. In this work, we studied a transition from a laminar state to temporal chaos to turbulence which happens in an intermittent way, in the one-dimensional for ed and damped nonlinear Shrödinger equation, a model that represents diferent physical problems, particularly it provides an accurate description of the envelope dynamics of waves in slightly nonlinear, dispersive and conservative medium. The statistical properties of the time series of the wave energy show that the transition takes place accordingly with a known dynamical behavior named in the literature as on-off intermittency induced by unstable dimension variability. The further analysis of the distribution of the finite time Lyapunov exponents confims that the loss of transverse instability of a low dimensional chaotic attractor, embedded in the Fourier phase spa e, is indeed the underlying mechanism behind the intermittency, and therefore leads the system to a turbulent state. In the specific case of the studied model, the increase in intensity of the for ing amplitude induces the loss of transverse stability in a low-energy attractor, which leads to the emergence of intermittency and then spatiotemporal chaos in the system. Additionally, we were able to successfully de compose the dynamics into the so called longitudinal, mixed and transverse modes. It was then possible to approximately map the regions of maximum transverse instability in the low-dimensional chaotic attractor, and perturb the system in order to inhibit the ocurrence of intermittent extreme events.

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Casson, Ian. "Determinants of loss of control of hypertension". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2002. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ65608.pdf.

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Dongmo, Jean Etienne Temgoua Kwatny Harry G. "Aircraft loss-of-control prevention and recovery : a hybrid control strategy /". Philadelphia, Pa. : Drexel University, 2010. http://hdl.handle.net/1860/3252.

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Zhou, Kaiyu. "Packet loss models of the Transmission Control Protocol". Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B36873172.

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Zhou, Kaiyu, e 周開宇. "Packet loss models of the Transmission Control Protocol". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B36873172.

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Più fonti

Libri sul tema "Loss of control events"

Montana. Division of Workers' Compensation. Bureau of Safety. Loss control program. Helena, Mont. (5 South Last Chance Gulch, Helena 59601): The Bureau, 1985.

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H, Jones Peter. Retail loss control. London: Butterworths, 1990.

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Thornton, Julian. Water loss control. 2^a ed. New York: McGraw-Hill, 2008.

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H, Jones Peter. Retail loss control. 2^a ed. Oxford: Butterworths, 1997.

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Bird, Frank E. Practical loss control leadership. Loganville, Ga: International Loss Control Institute, 1986.

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L, Germain George, e Norske Veritas (Organization), a cura di. Practical loss control leadership. Loganville, Ga: Det Norske Veritas (U.S.A.), 1996.

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Security/loss control negligence. Columbia, MD: Hanrow Press, 1985.

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Weight control. Sluice Dock, CT: Dushkin Pub. Group, 1992.

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I, Kostanoski John, a cura di. Introduction to security and loss control. Englewood Cliffs, N.J: Prentice Hall, 1990.

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Association, American Water Works, a cura di. Water audits and loss control programs. Denver: American Water Works Association, 2016.

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Capitoli di libri sul tema "Loss of control events"

Pinchbeck, Michael, e Andrew Westerside. "Staging Loss: A Conclusion—Some Words Speak of Events. Other Words, Events Make Us Speak". In Staging Loss, 249–59. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97970-0_15.

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Small, James E. "Localized Events". In Electronic Control Fires, 7–12. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52845-8_3.

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Silvers, Julia Rutherford, e William O’Toole. "Loss prevention, corruption, and security". In Risk Management for Events, 117–48. Second edition. | Abingdon, Oxon ; New York : Routledge, 2021. | Series: Event management series | Revised edition of: Risk management for meetings and events, c2015.: Routledge, 2020. http://dx.doi.org/10.4324/9780429291296-7.

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Brown, George W. "Life events, loss and depressive disorders". In Mental Health Matters: A Reader, 36–45. London: Macmillan Education UK, 1996. http://dx.doi.org/10.1007/978-1-349-25209-1_5.

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Strange, Richard N. "Prepenetration and penetration events". In Plant Disease Control, 163–85. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-4632-4_7.

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Small, James E. "Facts Regarding Typical Events". In Electronic Control Fires, 3–5. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52845-8_2.

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Cowell, John. "ADO Data Control Events". In Essential Visual Basic 6.0 fast, 183–89. London: Springer London, 2000. http://dx.doi.org/10.1007/978-1-4471-3417-6_17.

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Forman, Evan M., e Meghan L. Butryn. "Session 23: Maintaining Motivation". In Effective Weight Loss, 199–204. Oxford University Press, 2016. http://dx.doi.org/10.1093/med:psych/9780190232009.003.0023.

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This chapter (Session 23) discusses how to maintain long-term motivation for weight control by focusing on the importance of values to motivate behavior, even if short-term reward of weight control behaviors is decreasing (e.g., weight loss is slowing, self-monitoring is becoming tiresome). Clients are encouraged to view the hard work of weight control as working toward their values and to use the skill of willingness to continue to engage in healthy behaviors, even when it is difficult uncomfortable to do so.

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Forman, Evan M., e Meghan L. Butryn. "Session 23: Maintaining Motivation". In Effective Weight Loss, 139–44. Oxford University Press, 2016. http://dx.doi.org/10.1093/med:psych/9780190232023.003.0024.

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Forman, Evan M., e Meghan L. Butryn. "Session 13: Strategies to Help Defuse and Increase Willingness". In Effective Weight Loss, 105–14. Oxford University Press, 2016. http://dx.doi.org/10.1093/med:psych/9780190232009.003.0013.

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This chapter (Session 13) presents strategies on promoting defusion and increasing willingness to engage in weight control behaviors, even when doing so results in decreased pleasure or discomfort. Some of the strategies to promote defusion include using the metaphor of “leaves on a stream,” uncoupling internal experiences from behaviors, replacing “but” with “and,” and using the “just do it” approach.

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Atti di convegni sul tema "Loss of control events"

Volkanovski, Andrija, Antonio Ballesteros Avila e Miguel Peinador Veira. "Results of the Loss of Offsite Power Events Analysis". In 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60153.

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This paper presents the results of statistical and engineering analysis of Loss of Offsite Power (LOOP) events registered in four reviewed databases. The paper includes events registered in IRSN (Institut de Radioprotection et de Sûreté Nucléaire) SAPIDE and GRS (Gesellschaft für Anlagen- und Reaktorsicherheit mbH) VERA database in time period 1992 to 2011. The Nuclear Regulatory Commission (NRC) Licensee Event Reports (LERs) database and the IAEA International Reporting System (IRS) database are screened for the relevant events registered in period 1990 to 2013. In total, 228 relevant events were identified in the IRSN database, 190 in GRS, 120 in LER and 52 in IRS. The data include events registered both during the critical (at power) and shutdown operation of the plants. The identified events were classified considering nine different categories. In the three databases (SAPIDE, VERA, IAEA-IRS) the largest numbers of events are registered for the plant centered category. The largest number of the events in the NRC-LER database is found for switchyard centered events. According to the mode of operation, most events were reported during critical power operation, in all four databases. The “Partial loss of external power” events are the most frequent type of event found in the IRSN and NRC databases while the “Physical loss of electrical busbars” is the main type in the GRS and IAEA databases. The largest number of events in all databases is identified for the switchyard failures followed by the interconnections failures (both lines and transformers). Mainly LOOP event are identified by the fault report in the control room. Electrical deficiency is detected as the main direct cause of events. Environment is registered as the main contributor for the electrical grid deficiency in the French and NRC databases. Electrical failures are dominant contributor to the electrical grid deficiency in the German and IAEA databases. The principal root cause for the LOOP events are human failures with the human errors during test, inspection and maintenance as the largest sub-group. The largest number of the LOOP events resulted in reactor trip followed by the Emergency Diesel Generator (EDG) start. The majority of the reported LOOP events lasted for more than 2 minutes. Main lessons learned from the analysed events and potential actions for decrease of the number of LOOP events are presented.

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Black, Jared L., Eckhard Hinrichsen e Alfredo Tello Zenteno. "Simulating the Financial Cost of a Deepwater Loss of Well Control". In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10172.

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An international oil company developed a deep water exploratory drilling program scheduled to start in 2011. The company’s safety department required a financial risk analysis of the drilling program to aid in establishing insurance coverage levels. The purpose was to establish a probability cost distribution associated with a lost well control (LWC) incident. A numerical probabilistic simulation approach was deemed necessary since historical LWC cost data were insufficient for statistical analysis. A ten branch fault tree with up to 38 elements (events) per branch was selected to represent the range of damage conditions that could follow a LWC incident. Probability density functions representing each event’s cost range were selected using a best fit procedure. The simulation procedure randomly selected a tree branch and then passed through the branch selecting costs randomly from each event’s cost-probability distribution. Event costs were summed to provide a total LWC cost for that simulation run. The simulation was repeated multiple times providing a suite of LWC total cost values. These data were then evaluated statistically to establish a LWC cost probability distribution. These results were used by the company’s risk division as an aid in determining the level of insurance to acquire.

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Rafi, Melvin, James E. Steck, Animesh Chakravarthy e Tansel Yucelen. "Approaches to Real-time Predictive Estimation of Loss-of-Control Events & Boundaries on Transport Aircraft". In AIAA Guidance, Navigation, and Control Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2017. http://dx.doi.org/10.2514/6.2017-1716.

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Dahal, Niraj, e Steven M. Rovnyak. "Algorithms for Detecting Nearby Loss of Generation Events for Decentralized Controls". In 2021 IEEE Power and Energy Conference at Illinois (PECI). IEEE, 2021. http://dx.doi.org/10.1109/peci51586.2021.9435265.

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Kim, Jaewhan, Soo-Yong Park e Kwang-Il Ahn. "The iROCS Approach to Mitigating Beyond-Design-Basis External Events". In 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60059.

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An extended loss of all electric power occurred at the Fukushima Dai-ichi nuclear power plant by a large earthquake and subsequent tsunami. This event led to a loss of reactor core cooling and containment integrity functions at several units of the site, ultimately resulting in large release of radioactive materials into the environment. In order to cope with beyond-design-basis external events (BDBEEs), this study proposes the iROCS (integrated, RObust Coping Strategies) approach. The iROCS approach is characterized by classification of various plant damage conditions (PDCs) that might be impacted by BDBEEs and corresponding integrated coping strategies for each of PDCs, aiming to maintain and restore core cooling (i.e., to prevent core damage) and to maintain the integrity of the reactor pressure vessel if it is judged that core damage may not be preventable in view of plant conditions. The plant damage conditions considered in the iROCS approach include combinations of the following conditions of the critical safety functions: (1) an extended loss of AC power, (2) an extended loss of DC power (loss of the monitoring and control function at control rooms), (3) a loss of RCS inventory, and (4) a loss of secondary heat removal. From a case study for an extreme damage condition, it is shown that candidate accident management strategies should be evaluated from the viewpoint of effectiveness and feasibility against extreme damage conditions of the site and accident scenarios of the plant.

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Lutz, Robert J., James Lynde e Steven Pierson. "FLEX Loss of Instrumentation Guidance for PWRs Enhances Severe Accident Diagnostics". In 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60055.

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The industry response to the Nuclear Regulatory Commission (NRC) Order EA-12-049 is based on a set of Diverse and Flexible Coping Strategies (commonly referred to as FLEX) for beyond design basis external events as described in NEI 12-06. The Pressurized Water Reactors Owners Group (PWROG) developed generic guidance for response to these Beyond Design Basis External Events (BDBEE), called FLEX Support Guidelines (FSGs). These guidelines are referenced from the plant Emergency Operating Procedures (EOPs) when it is determined that an event exhibits certain beyond design basis characteristics such as an Extended Loss of all AC Power (ELAP). These generic FLEX Support Guidelines provide a uniform basis for all PWRs to implement the FLEX guidance in NEI 12-06 that was endorsed by the NRC to maintain core, containment and spent fuel cooling. The PWROG generic FSGs include guidance in FSG-7, “Loss of Vital Instrumentation or Control Power” for obtaining information for key plant parameters in an ELAP event. The key parameters were selected based on industry guidance and plant specific implementation. This set of key parameters will allow the licensed operators to have vital instrumentation to safely shutdown the core and maintain the core in a shutdown condition, including core, containment and spent fuel pool cooling. These parameters are used in the EOPs as well as the FSGs that are designed to mitigate a beyond design basis event. The requirements of NEI 12-06, as implemented through the FSGs, enhance both availability and reliability of instrumentation by requiring diverse methods of providing DC power for instrumentation and control as well as protection of instrumentation from the beyond design basis event. The subsequent implementation of this guidance at the Byron Station has proven to also be beneficial for diagnosis of severe accident conditions (where core cooling could not be maintained). The same parameter values that are needed to verify core, containment and spent fuel cooling prior to core damage are also needed to diagnose severe accident conditions. Guidance provided within FSG-7, as implemented at the Byron Station, contains several layers of diverse methods to obtain parametric values for key variables that can be especially useful when the environmental qualification is exceeded for the primary instrumentation that provides this information. The methods range from the use of self-powered portable monitoring equipment to the use of local mechanical instrumentation. The FSG-7 guidance is referenced from the Byron Severe Accident Management Guidance (SAMG) to either obtain parameter information during a severe accident or to validate the information that is available from the primary instrumentation.

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Khoumsi, Ahmed. "Decentralized supervisory control of discrete event systems without loss of information". In 2017 4th International Conference on Control, Decision and Information Technologies (CoDIT). IEEE, 2017. http://dx.doi.org/10.1109/codit.2017.8102644.

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Li, Songcheng, Mike Campbell, Hugh Howells e John Orsak. "Tension Loss of Hydro-Pneumatic Riser Tensioners". In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10090.

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With drilling exploration extending to deeper water, the total top tension to lift a drilling riser increases accordingly. Tensioners with higher tension capacity are preferred to minimize the total number of tensioners due to space limitation on a drilling vessel. Higher tension capacity requires more advanced recoil control for emergency events. Hydro-pneumatic tensioners are widely used for risers with anti-recoil control in deep water, and are commonly simulated as an equivalent linear or nonlinear spring or a pneumatic system. The discrepancy between simulation and measurement calls for a model with rate dependent stiffness considering the compressibility of hydraulic oil, the interference of valve control and friction loss along piping or hose. In this paper, the hydro-pneumatic tensioner system with anti-recoil valve control is simulated in 2HRecoil, a customized version of ANSYS Mechanical APDL, and benchmarked with commercial software DeepRiser. The tension loss due to hydraulic oil friction, mass inertia, piston-cylinder friction is evaluated with coupled riser motion. The conventional approach in simulating the hydro-pneumatic tensioner system as an equivalent pneumatic system is found inaccurate. The sensitivity of the pressure difference between the cylinder chamber and the high pressure accumulator on the gas constant is discussed. The scatter in predicting gas constant, friction and damping coefficients from measured data is explained using hydro-pneumatic approach.

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Tost, Brian Christopher, Kelly Rose, Janine Carney, Fred Aminzadeh e Anuj Suhag. "Early Kick Detection from Downhole Measurements: A Novel Method for Reducing the Frequency and Magnitude of Loss-of-Well-Control Events". In Offshore Technology Conference. Offshore Technology Conference, 2020. http://dx.doi.org/10.4043/30831-ms.

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Linsenmayer, Steffen, Dimos V. Dimarogonas e Frank Allgower. "A non-monotonic approach to periodic event-triggered control with packet loss". In 2016 IEEE 55th Conference on Decision and Control (CDC). IEEE, 2016. http://dx.doi.org/10.1109/cdc.2016.7798319.

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Rapporti di organizzazioni sul tema "Loss of control events"

Silowash, George J., e Christopher King. Insider Threat Control: Understanding Data Loss Prevention (DLP) and Detection by Correlating Events from Multiple Sources. Fort Belvoir, VA: Defense Technical Information Center, gennaio 2013. http://dx.doi.org/10.21236/ada610587.

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Johnson, Nancy, John A. Schroeder e Zhegang Ma. Analysis of Loss-of-Offsite-Power Events: 1987-2016. Office of Scientific and Technical Information (OSTI), agosto 2017. http://dx.doi.org/10.2172/1468434.

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T. E. Wierman. Analysis of Loss-of-Offsite-Power Events 1998–2012. Office of Scientific and Technical Information (OSTI), ottobre 2013. http://dx.doi.org/10.2172/1129950.

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Johnson, Nancy Ellen, e John Alton Schroeder. Analysis of Loss-of-Offsite-Power Events 1997-2015. Office of Scientific and Technical Information (OSTI), luglio 2016. http://dx.doi.org/10.2172/1369381.

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Schroeder, John Alton. Analysis of Loss-of-Offsite-Power Events 1998–2013. Office of Scientific and Technical Information (OSTI), febbraio 2015. http://dx.doi.org/10.2172/1261724.

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Johnson, Nancy, e Zhegang Ma. Analysis of Loss-of-Offsite-Power Events 1987-2018. Office of Scientific and Technical Information (OSTI), aprile 2020. http://dx.doi.org/10.2172/1755379.

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St Sauver, Joe. Loss of Network Control Incidents. Internet2, ottobre 2008. http://dx.doi.org/10.26869/ti.71.1.

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McCallum, Jacob Bryan. Addressing Design Basis Events and the Concurrent Loss of Multiple Parameters. Office of Scientific and Technical Information (OSTI), marzo 2019. http://dx.doi.org/10.2172/1501771.

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Iyengar, J., e I. Swett, a cura di. QUIC Loss Detection and Congestion Control. RFC Editor, maggio 2021. http://dx.doi.org/10.17487/rfc9002.

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Kramer, Steve L. Loss Control and Monitoring Systems for NSLS-Ii. Office of Scientific and Technical Information (OSTI), gennaio 2016. http://dx.doi.org/10.2172/1505104.

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