Dissertations / Theses on the topic 'Passive protection systems'
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Heater, Morgan. "Passive freeze protection for passive solar thermal DHW systems." Diss., Connect to online resource, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1435243.
Full textCoelho, Rodrigo Marquês. "Development of passive protection systems using cellular materials." Master's thesis, Universidade de Aveiro, 2010. http://hdl.handle.net/10773/4518.
Full textFröming, Robert. "Assessment of integrated pedestrian protection systems /." Düsseldorf : VDI-Verl, 2008. http://d-nb.info/99032060X/04.
Full textCastillo, Alfred. "Respondent Perceived Threat During the Information Systems Requirements Determination Process: Understanding and Mitigation." FIU Digital Commons, 2017. https://digitalcommons.fiu.edu/etd/3549.
Full textMahloo, Mozhgan. "Reliability versus Cost in Next Generation Optical Access Networks." Licentiate thesis, KTH, Optical Network Laboratory (ON Lab), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-122380.
Full textQC 20130530
FP7 EU project, Optical Access Seamless Evolution(OASE)
Bishay-Girges, Nagui William. "Seismic protection of structures using passive control system." Thesis, University of Canterbury. Civil Engineering, 2004. http://hdl.handle.net/10092/7509.
Full textArguence, Olivier. "Modélisation des ilots non-intentionnels et caractérisation des méthodes passives de détection d’ilotage." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAT045/document.
Full textUnintentional islands might appear when a subpart of the grid is disconnected from the power system and keeps working because of local generation. These events are unwanted: their behavior is not controlled and leads to potential risks for people and for electric equipment. Unintentional islanding is a complex phenomenon and badly understood. Nowadays it is considered to be rare, but a priori its occurrence probability is currently steadily increasing. This rising is the consequence of several phenomena: firstly, the development of distributed generation of small and average size directly connected to the distribution grid; secondly, the enlargement of frequency thresholds used by isolating protections; and thirdly, the implementation of power regulations of active and reactive power in the generation unit. Within this context, the Smart Grid chair of Enedis financed this PhD thesis in order to better characterize these islanding phenomena and to improve their detection.To achieve these targets, a first priority of the PhD was to improve the comprehension of unintentional islanding through symbolic calculation. This approach makes it possible to solve a simple model and to explain the evolution of the frequency during an island. These results are completed with several laboratory experiments and by numeric simulations. Models are designed based on a thorough bibliography, in particular for load modeling.A second priority of the PhD was to estimate the efficiency of anti-islanding protections through the computation of non-detection zone (NDZ). The impact of several loads on the NDZ is analyzed to improve the understanding of unintentional islanding, which is a complex phenomenon. The efficiency of new anti-islanding protections using thresholds on the rate of change of frequency (ROCOF) is also thoroughly evaluated. It is shown that the computation method used by the protection plays a key role. At last, the calculation methods of the NDZ is improved regarding previous methods. Among other things, it allows to radically change the estimations of the impact of new power regulations P(f) and Q(U)
Moreno, Barbosa Andrés Dario. "Passage à l’échelle des systèmes de recommandation avec respect de la vie privée." Thesis, Nice, 2014. http://www.theses.fr/2014NICE4128/document.
Full textThe main objective of this thesis is to propose a recommendation method that keeps in mind the privacy of users as well as the scalability of the system. To achieve this goal, an hybrid technique using content-based and collaborative filtering paradigms is used in order to attain an accurate model for recommendation, under the strain of mechanisms designed to keep user privacy, particularly designed to reduce the user exposure risk. The thesis contributions are threefold : First, a Collaborative Filtering model is defined by using client-side agent that interacts with public information about items kept on the recommender system side. Later, this model is extended into an hybrid approach for recommendation that includes a content-based strategy for content recommendation. Using a knowledge model based on keywords that describe the item domain, the hybrid approach increases the predictive performance of the models without much computational effort on the cold-start setting. Finally, some strategies to improve the recommender system's provided privacy are introduced: Random noise generation is used to limit the possible inferences an attacker can make when continually observing the interaction between the client-side agent and the server, and a blacklisted strategy is used to refrain the server from learning interactions that the user considers violate her privacy. The use of the hybrid model mitigates the negative impact these strategies cause on the predictive performance of the recommendations
Tsutsumi, Takuya. "Field Measurement and Analysis of Next-Generation Optical Access Network with Optical Amplifiers." Kyoto University, 2018. http://hdl.handle.net/2433/232417.
Full textPlantard, Guillaume. "Etre jeune adulte diplômé et allocataire du Revenu de Solidarité Active (RSA) : des modes et des trajectoires de vie, en périphérie du salariat, entre tensions et négociations." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAG021/document.
Full textThis thesis analyzes the lived tensions and negotiations conducted on a daily basis by young graduates, taking into account their training program and the use of RSA. Starting with interviews and stories, research focuses on socio-biographical process, with their many identities and relational transformations. A typology of lifestyles was first constructed to describe the multiple uses of RSA practiced daily. An analysis of the course in the device was then used to grasp the ways in which these young renegotiating uses RSA with their entourage and the professionals responsible for the accompaniment of the beneficiaries. Finally, this thesis shows that the use of RSA represents a significant social experience for young graduates, out of higher education and faced with job insecurity, particularly in the way they live their social transitions to adulthood
SPEER, SEAN. "PASSIVE AND NATURALIZED LANDFILL LEACHATE TREATMENT SYSTEMS FOR SOURCE WATER PROTECTION." Thesis, 2011. http://hdl.handle.net/1974/6821.
Full textThesis (Ph.D, Civil Engineering) -- Queen's University, 2011-09-30 15:55:45.73
Elshesheny, Ahmed, Mostafa H. A. Mohamed, and Therese Sheehan. "Protection of buried rigid pipes using geogrid-reinforced soil systems subjected to cyclic loading." 2020. http://hdl.handle.net/10454/18408.
Full textThe performance of buried rigid pipes underneath geogrid-reinforced soil while applying incrementally increased cyclic loading was assessed using a fully instrumented laboratory rig. The influence of varying two parameters of practical importance was investigated; the pipe burial depth and the number of geogrid-layers. Measurements were taken for pipe deformation, footing settlement, strain in pipe and reinforcing layers, and pressure/soil stress on the pipe crown during various stages of cyclic loading. The research outcomes demonstrated a rapid increase in the rate of deformation of the pipe and the footing, and the rate of generated strain in the pipe and the geogrid-layers during the first 300 cycles. While applying further cycles, those rates were significantly decreased. Increasing the pipe burial depth and number of geogrid-layers resulted in reductions in the footing and the pipe deformations, the pressure on pipe crown, and the pipe strains. Redistribution of stresses, due to the inclusion of reinforcing layers, formed a confined zone surrounding the pipe providing it with additional lateral support. The pipe invert experienced a rebound, which was found to be dependent on pressure around the pipe and the degree of densification of the bedding layer. Data for strains measured in the geogrid-layers showed that despite the applied loading value and the pipe burial depth, the tensile strain in the lower geogrid-layer was usually higher than that measured in the upper layer.
The full-text of this article will be released for public view at the end of the publisher embargo on 5 Jun 2021.
Tai, Yung-Ta, and 戴永達. "A Study of Passive Fire Protection System for the Computer Room." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/20204235819506954331.
Full text東南科技大學
營建科技與防災研究所在職專班
102
Abstract Recently, economy and technology evolution continue booming all over the world. Modern intelligent buildings, shopping malls, power stations, Hi-Tech fabrication plants, and hospitals are designed and constructed one by one. All of them need a Data Center to support their daily operation for all the central/distributed control and/or intelligent automation works; it plays a role like the brain of each organization. one second of accidental shut down is not allowable because it may cause huge business loss or even human life impact. Thus, fire protection for the Data Center become one of the most important topics in the modern constructional engineering area. In the computer room, the computer/network is the major systems which have many supporting facilities such as power supply, air condition, and fire protection systems…etc are built to keep and to perform the major system work well and protection at all the time. But the fire/smoke attack which issues from the pipeline that travelling through rooms and buildings is still hard to be warranted and sometimes ignored, these finally become a leak in the fire protecting efforts. In general, Active Fire Protection facilities such as Fire Extinguisher、Sprinkler Systems are all carefully inspected item by item and are relative complete because they are requested by the rule of government fire protection agency, but for the Passive Fire Protection System related to partition plan, door material and pipeline draws relative less attention and is even ignored. The importance of the Data Center is doubtless, we also know its computer room is definitely the most critical area. For the Computer Room fire protection topic, this study explores Fire Compartment Strategy, Partition Wall Design, Fire-Proof door material, through Hole sealing、Fire Retarding and Smoke Blocking considerations, try to give a proposal which promotes the Passive Fire Protection level higher to get a long term stable fire protection environment for the computer room and the intelligent organizations.
Wan, Yaming. "Modeling, analysis, and comparative study of several seismic passive protective systems for structures." Thesis, 1997. http://hdl.handle.net/1911/17140.
Full textМогаддам, Али Хасан. "Моделирование удержания топлива внутри контейнмента во время тяжелых аварий на АЭС." Doctoral thesis, 2009. https://ela.kpi.ua/handle/123456789/1121.
Full textPasala, Dharma Theja. "Seismic response control of structures using novel adaptive passive and semi-active variable stiffness and negative stiffness devices." Thesis, 2013. http://hdl.handle.net/1911/72017.
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