Дисертації з теми "Safety and Stability"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "Safety and Stability".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Kelley, David Frederick. "Safety and stability in concrete barrel shell roof structures." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/26232.
Повний текст джерелаKlüh, Ulrich [Verfasser]. "Financial Safety Net Design and Systemic Stability / Ulrich Klüh." Aachen : Shaker, 2006. http://d-nb.info/1166508323/34.
Повний текст джерелаSaydan, Deniz. "Damage stability of ships as a safety criterion for optimisation tools." Thesis, University of Southampton, 2006. https://eprints.soton.ac.uk/142587/.
Повний текст джерелаSchlehuber-Caissier, Philipp. "Contributions to robotic control design with formal safety and stability guarantees." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS346.
Повний текст джерелаOne of the key issues for robotic applications, or in a larger sense for all cyber-physical systems, is safety. Safety can have different implications depending on the field of work and the system concerned. However a very broad definition of safety can be given as ensuring that certain states or events never occur or that the consequences resulting from such unsafe events are bounded to an acceptable level, no matter the circumstances. In this thesis an active type of safety is pursued, strengthening the constraints on the control strategy. The goal is to provide means to automatically generate control strategies that provide formal, model-based guarantees that no undesired states or events occur, considering all possible circumstances. To this end, I seek to combione formal model checking techniques, specifically the theory of timed automata and supervised control, and robotic control strategies based on numerical optimization. This work is centred around three different but interconnected research topics: 1) Control law synthesis via timed automata abstraction 2) Stabilizability of dynamical systems 3) Learning stable vector fields from demonstration
Pargač, Martin. "Zajištění hlubokého zářezu v sesuvné oblasti." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226336.
Повний текст джерелаKang, Xu. "Supramolecular modification of commonly used photoactive drugs regarding their photochemistry, stability, and safety." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1626456443488287.
Повний текст джерелаLange, David. "Risk and performance based fire safety design of steel and composite structures." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/3159.
Повний текст джерелаOztop, Celal. "Beforehand Obtaining A Safety Operation Condition By Using Daily Load Curves In Transient Stability And Graphical Software For Transient Stability Applications." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606457/index.pdf.
Повний текст джерелаBramsäter, Jenny. "Closure of Lilla Bredsjön Tailings Dam : an Evaluation of the Long-Term Dam Safety Measures." Thesis, KTH, Vattendragsteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210320.
Повний текст джерелаGruvindustrin bidrar med enorma mängder avfall över hela världen, vilket ställer höga krav på gruvdammar. I Sverige finns det strikta förordningar gällande hanteringen och efterbehandlingen av gruvdammar, men en del dammar som byggdes innan dessa förordningar existerade utgör fortfarande ett hot mot miljön. Lilla Bredsjön i Dalarna är ett exempel på en gammal gruvdamm som inte blivit efterbehandlad tillräckligt. Boliden, som äger dammen, har möten med Länsstyelssen Dalarna angående ansvarsförhållanden gällande gamla förorenade områden i Garpenberg där även Lilla Bredsjön ingår. Denna studie syftar till att undersöka möjliga efterbehandlingsmetoder av dammarna vid Lilla Bredsjön för att uppnå långtidsstabilitet i samband med nedläggning av anläggningen. Lilla Bredsjön är 350 000 m2 stor och består av tre uppdämningar; damm 1 i öst, damm 2 i söder och damm 3 i norr. Damm 1 är sju meter som högst medan damm 2 och 3 båda är tre meter höga. Samtliga dammar är klassificerade till konsekvensklass 3, vilket betyder att konsekvenserna i händelse av ett dammbrott är försumbara. Dammarna är byggda med uppåtmetoden och har tätkärnor av morän. Magasinet är delvis täckt med slam utblandat med biobränsleaska, men ingen riktig efterbehandling har utförts. En geoteknisk undersökning genomfördes för att erhålla mer information om geometrin, konstruktionen och grundläggningen av varje damm. Det observerades att damm 1 består av en tätkärna av morän samt stödfyllning som båda konstruerades med julgransprincipen. Damm 2 består av ett grov- och finfilter i uppströmsdelen av dammen medan resten av dammen består av en tätkärna av morän. Damm 3 består av anrikningssand och en tätkärna av morän, och var liksom damm 1 konstruerad med julgransprincipen. Nedströmsslänterna på alla dammar är väldigt branta med en vinkel på ungefär 34o. Genomströmnings- och stabilitetsberäkningar genomfördes därför i programmet GeoStudio. I GeoStudio användes två olika verktyg; SEEP/W för att beräkna genomströmning och SLOPE/W för att beräkna släntstabilitet. Fyra olika hydrauliska belastningsfall analyserades i beräkningarna: normalfallet, överdämning, dimensionerat läckage och normalfallet med lägre permeabilitet på anrikningssanden. Resultatet visar på att samtliga dammar är instabila i deras nuvarande skick, beräknat på normalfallet med både ursprunglig och lägre permeabilitet på anrikningssanden, samt vid överdämning. Den erforderliga säkerhetsfaktorn är däremot uppfylld vid dimensionerat läckage. Stabiliteten är starkt beroende av portrycket inuti dammarna, vilket i sin tur är beroende av vilken efterbehandlingsmetod som väljs för magasinet. Baserat på resultatet från stabilitetsberäkningarna kan det konstateras att om torrtäckning väljs som efterbehandlingsmetod så räcker det förmodligen med att förstärka nuvarande dammar för att uppnå långtidsstabilitet. Om, å andra sidan, en förhöjd grundvattennivå väljs behövs med största sannolikhet en mer omfattande lösning, till exempel helt nya dammar direkt nedströms de nuvarande. Innan ett beslut gällande efterbehandlingsmetod av magasinet har tagits är det alltså väldigt svårt att dra en slutsats gällande den mest lämpliga efterbehandlingsmetoden av dammarna.
Deakins, Eric. "Prediction of the risk of capsize of small ships." Thesis, University of Plymouth, 1988. http://hdl.handle.net/10026.1/2343.
Повний текст джерелаShea, Thomas Michael. "Localized Expansion of Pedicle Screws for Increased Stability and Safety in the Osteoporotic Spine." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5308.
Повний текст джерелаFekadu, Robel Tekeste, and Sujata Kayastha. "Safety Assessment of Cracked Buttress Dams." Thesis, KTH, Betongbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-284527.
Повний текст джерелаDe flesta betonglamelldammar i Sverige byggdes under 1950 - 80-talet baserat påden traditionella analysmetoden. Dessa strukturer är armerade och tunga. Derashöjd-tjocklek förhållande är stor nog för att de ska vara benägna att spricka underderas livstid. Uppkomsten av dessa sprickor utsätter armeringen i lamelldammar förkorrosion på grund av att vattnet tränger in genom dessas sprickor. Därför är detytterst viktigt att studera effekter av sprickor och medföljande korrosion avseendedammsäkerhet och bör utföras innan dammarna är ur funktion. Trots vikten avdetta problem, har endast begränsade studier genmfört för att hantera dessa frågor.Huvudmålet med detta examensarbete är att utvärdera den traditionellaanalysmetodens kapacitet att fånga dammens brottillstånd före och efteruppkomsten av sprickor och armeringskorrosion. I den traditionella metoden utförsde analytiska stabilitetsberäkningar av säkerhetsfaktorn för glidning och stjälpningseparat. Men i verkligheten förekommer inte dessa två fenomen separat utan ikombinerat form. För att studera detta fenomen beaktades därför två fallstudier. Ibåda fallen utfördes finita element metod (FEM) och analytiska beräkningar föratt utvärdera brottillstånd. Dessutom utvärderas påverkan av sprickor ocharmeringskorrosion på säkerhetsfaktorn. Programvaran som användes för attutföra FE-analyserna var COMSOL och ABAQUS. Analytiska beräkningarutfördes i MATLAB.Resultaten från analyserna visade att ett kombinerat brottillstånd uppstod iFE-analyserna av lamelldammarna i samtliga studerade fall. Därmed är de utfördaanalytiska beräkningar inte tillräckliga för att fånga brottillståndet. Vidareobserverades att armeringar hade betydande inverkan på säkerhetsfaktornberoende på sprickmönstren. På liknande sätt hade armeringskorrosion signifikantinverkan på säkerhetsfaktorn beroende på sprickmönstren.Utifrån resultatet av FE-analyserna kan man konstatera att den kombineradebrottmoden var det avgörande brottillståndet, och därför bör traditionellaanalysmetoder utföras för att stödja utvärderingen av dessa FE-analyser men inteför att erhålla de faktiska brottillstånd. Dessutom, det kunde observeras attarmering och armeringskorrosion har betydande påverkan på säkerhetsfaktorn avdammar och bör undersökas noggrant.
Albataineh, Nermeen. "SLOPE STABILITY ANALYSIS USING 2D AND 3D METHODS." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1153719372.
Повний текст джерелаWickstrom, Nell E. "Effect of Chronic Hyperthermia in Firefighters on Cognitive Function and Postural Stability." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563873405010639.
Повний текст джерелаCRUZ, LUIS FERNANDO CHAHUA. "DETERMINATION OF SAFETY FACTOR IN SLOPE STABILITY USING LIMIT ANALYSIS AND SECOND ORDER CONIC PROGRAMMING." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2013. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=35625@1.
Повний текст джерелаCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
FUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO
PROGRAMA DE EXCELENCIA ACADEMICA
BOLSA NOTA 10
O presente trabalho tem como principal objetivo mostrar a aplicabilidade prática da análise limite pelo método de elementos finitos na avaliação de problemas de estabilidade de talude, sendo este colocado como um problema de programação matemática, no qual se precisa realizar um processo de otimização para a solução do problema. Apresenta-se um método para obter a solução do problema de estabilidade de taludes utilizando para isso a programação matemática, e fazendo ênfase na utilidade da programação cônica da segunda ordem (SOCP). Inicialmente faz uma revisão das formulações da análise limite, via o método de elementos finitos, encontradas na literatura existente. A seguir é descrita a formulação da análise limite numérica partindo do principio do trabalho virtual para sua formulação, e utilizando a ferramenta dos elementos finitos para realizar a implementação numérica. São propostas diferentes formas de trabalhar com o critério de resistência do material, sendo a de melhor desempenho, em termos de tempo de processamento a forma cônica quadrática que permite acoplar a programação cônica da segunda ordem (SOCP) na ferramenta numérica. É acoplada a técnica da redução dos parâmetros de resistência do material com a finalidade de encontrar o fator de segurança da estrutura do talude (FS). Finalmente são apresentados exemplos de validação e aplicação, os quais permitem visualizar a eficiência da ferramenta desenvolvida em termos de tempo de processamento ao utilizar a programação cônica da segunda ordem (SOCP). Os resultados sugerem viabilidade da utilização da técnica estudada na solução de problemas relacionada à estabilidade de taludes.
The main objective of this work is to show the practical applicability of limit analysis by finite element method in the evaluation of slope stability problems, and this placed as a mathematical programming problem, which you need to perform an optimization process to solve the problem. We present a method to obtain the solution of the problem of slope stability using for this mathematical programming, and making emphasis on the usefulness of the second order conic programming (SOCP). Initially, a review of formulations Limit Analysis via Finite Element Method, found in the existing literature. Then is described the Numerical Limit Analysis formulation starting from virtual work principle their formulation, and using Finite Element Method as a tool to carry out the numerical implementation. We propose different ways of working with the yield criterion of the material, being the best performing in terms of processing time the conic quadratic form that allows to coupling to the second order conic programming (SOCP) in numerical implementation. It is coupled to the technique of reducing the strength parameters of the material in order to find the safety factor of the slope of the structure (FS). Finally, examples are presented for validation and application, which allow you to view the efficiency of the developed implementation in terms of processing time with the use of second order conic programming (SOCP). The results suggest the feasibility of using the technique studied in the solution of problems related to Slope Stability.
Zhang, Le-Le. "Increasing the road safety of e-bike : design of protective shells based on stability criteria." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/41253/.
Повний текст джерелаEbeling, Robert M. "Methods of evaluating the stability and safety of gravity earth retaining structures founded on rock." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54351.
Повний текст джерелаPh. D.
Gadde, Murali Mohan. "Effect of in-situ stresses on the stability of coal mine development workings." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=3065.
Повний текст джерелаTitle from document title page. Document formatted into pages; contains xii, 130 p. : ill. (some col.), map (part col.). Includes abstract. Includes bibliographical references (p. 127-130).
Standen, Paul. "Towed vehicle aerodynamics." Thesis, University of Bath, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311175.
Повний текст джерелаFaty, Moustapha. "La Politique de sécurité et de stabilité au Maghreb." Thesis, Reims, 2016. http://www.theses.fr/2016REIMD001/document.
Повний текст джерелаAbstractMaghreb is porter zone of a number of contradictions, political, ideological fractures, even the economic and different security systems. All of these elements are of pressure or crises and conflicts that show the Maghreb remain an extremely weak and vulnerable region. It is also an area which fall in fiercest conflicts for since a long time ago, the insoluble problems of western Sahara, tensions between Algeria and Morocco, conflict between Morocco and Spain (the enclaves of Septa and M'Lila). As for as of a number of subjects that constitute a difficult trap to master.The question of security and the stability of Maghreb lay down in terms of indivisibility .the global problem affirmed since the independence of the nations of the region. The military aspects, economic, demographic, cultural, religions, and politic are strongly inter-related. The reinforcement of the security and the stability in this area appears a major strategic option in which must engage all Mediterranean Maghreb countries and international actors
Hajda, Jindřich. "Výpočet stability svahů hrází malých vodních nádrží." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265266.
Повний текст джерелаVant, J. H. B. "Offshore oil : The influence of recruitment, selection and placement on employer attitudes, stability and accident rates in drilling companies." Thesis, Brunel University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381159.
Повний текст джерелаCOZZI, ARIANNA CECILIA. "Technological strategies and pharmacoeconomic remarks in the prevention of photoinduced damages: product stability, efficacy and safety." Doctoral thesis, Università degli studi di Pavia, 2019. http://hdl.handle.net/11571/1251367.
Повний текст джерелаCOZZI, ARIANNA CECILIA. "Technological strategies and pharmacoeconomic remarks in the prevention of photoinduced damages: product stability, efficacy and safety." Doctoral thesis, Università degli studi di Pavia, 2019. http://hdl.handle.net/11571/1251387.
Повний текст джерелаCOZZI, ARIANNA CECILIA. "Technological strategies and pharmacoeconomic remarks in the prevention of photoinduced damages: product stability, efficacy and safety." Doctoral thesis, Università degli studi di Pavia, 2019. http://hdl.handle.net/11571/1251407.
Повний текст джерелаNaidoo, Kumendrie. "Considerations for stope gully stability in gold and platinum mines in South Africa." Diss., Pretoria : [s.n.], 2001. http://upetd.up.ac.za/thesis/available/etd-11302005-123445/.
Повний текст джерелаHossain, Md M. "Stability analysis of anchored rock slopes against plane failure subjected to surcharge and seismic loads." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2011. https://ro.ecu.edu.au/theses/139.
Повний текст джерелаEkr, Jan. "Numerické modely pro posuzování stability zemního svahu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225631.
Повний текст джерелаHernandez-Villanueva, Alfredo Ausencio 1958. "Slope stability of the Pit Number One, El Encino mine, southern Jalisco, Mexico." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/276619.
Повний текст джерелаJaník, Michal. "Návrh sanace sesuvu Nedašova Lhota." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225518.
Повний текст джерелаBetlach, František. "Studie napjatosti a přetvoření zděné přehrady." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240016.
Повний текст джерелаLi, An-Jui. "Two and three dimensional stability analyses for soil and rock slopes." University of Western Australia. School of Civil and Resource Engineering, 2009. http://theses.library.uwa.edu.au/adt-WU2010.0016.
Повний текст джерелаBukovský, Petr. "Posouzení kyvných podpěr turbíny z hlediska vzniku MS deformační stability." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230263.
Повний текст джерелаFouhy, David, and Bayona Francisco Ríos. "Reliability-Based Analysis of Concrete Dams." Thesis, KTH, Jord- och bergmekanik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-176867.
Повний текст джерелаRusticali, Valeria. "Numerical investigations on slope stability problems through mathematical optimization-based Finite Element approach." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/22124/.
Повний текст джерелаIqbal, Ali. "Probability of Failure for Concrete Gravity Dams for Sliding Failure - Proposal to solution for the eleventh ICOLD Benchmark workshop." Thesis, KTH, Jord- och bergmekanik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-100538.
Повний текст джерелаBjörkman, Helena. "Stabilitetsberäkningar och åtgärdsförslag vid islast på Skålandammen." Thesis, Uppsala University, Department of Earth Sciences, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9284.
Повний текст джерелаHydropower is an important source of energy in Sweden and accounts for about 46 % of the total energy production. Sweden has about 1 200 hydropower plants and with the intention of raising the pressure head of the water and to store water, dams are built by the power plants. The storage reservoirs make it possible to adjust the energy production by demand and season. Dams in connection to the reservoirs are subjected to additional loading during periods of high floods or when an icecap in the winter is formed on the reservoirs. In order to maintain the dam safety, the power companies in Sweden are working with guidelines for dam safety from RIDAS. An important part of the work of dam safety is FDU that is carried out with purposes of improving the work of dam safety. A FDU made for the Skålan dam in the River of Ljungan showed that the levels of the safety factors for sliding and overturning of the dam was not fulfilled when subjected to loads from an icecap. The object of this thesis was to follow up the FDU and by carrying out extensive stability calculations on all parts of the Skålan dam, investigate what safety factors the different parts will get and also investigate some proposal measures in order to increase the dam stability.
The stability calculations for the dam have been performed according to directions in RIDAS at four loading cases. Loading case I and II means a water level to the retained water level and an ice load of 200 and 100 kN/m respectively. Loading case III and IV means a situation without ice load but with a water level to the retained water level respectively a water level to a meter above the retained water level. The stability of the dam was studied with regards to sliding and overturning. The results from the stability calculations showed for both loading case I and II that the majority of the parts of the Skålan dam did not fulfill the levels of the safety factors. The calculations also showed that some parts of the dam did not fulfill the stability criteria of sliding at loading case III, which implies that these parts of the dam actually have not enough weight.
The measure proposals studied were the ice preventive measures IR-elements and circulation of the deep warm water and the stability increasing measure with pre strained rock anchorages. The net present value (NVP) for the different measures were calculated with a life length of the dam estimated to 60 years. The results from the calculations of the NVP showed that the most economically feasible measure is circulation of the water but when considering the results from the stability calculations, the most suitable measure is the rock anchorages. Therefore, a combination of rock anchorages on parts which not fulfills the stability criteria in combination with circulation of the water is suggested to be the best measure.
Vattenkraften är en viktig energikälla i Sverige som utgör ca 46 % av den totala energiproduktionen. I Sverige finns det ca 1 200 kraftverk och i syfte att öka fallhöjden och lagra vatten bygger man dammar i anslutning till kraftverken. Dammarna skapar stora magasin med vatten och gör det möjligt att anpassa elproduktionen efter säsong och behov.
Dammar och kraftverk vid vattenmagasinen utsätts för extra belastning under perioder med höga flöden samt vid islaster och för att upprätthålla dammsäkerheten har man tagit fram RIDAS - kraftföretagens riktlinjer för dammsäkerhet. Inom ramen för dammsäkerhetsarbete utförs fördjupade dammsäkerhetsutvärderingar, FDU, för att arbeta förebyggande och hitta möjligheter till förbättring av dammsäkerhetsarbetet. I en FDU gjord för Skålandammen i Ljungan påvisades att de av RIDAS uppsatta säkerhetsfaktorerna för glidning och stjälpning inte uppfylldes vid islast. Syftet med detta arbete var att följa upp FDU:n och med utförliga stabilitetsberäkningar på Skålandammens alla delar (monoliter) undersöka hur dessa klarar säkerhetsfaktorerna vid olika lastfall, hur stort problemet med islast är samt ta fram åtgärdsförslag för att öka dammens stabilitet.
Beräkningarna har utförts enligt RIDAS anvisningar för stabilitetsberäkningar vid fyra olika lastfall där de två första innebär en vattennivå till magasinets dämningsgräns samt en islast på 200 respektive 100 kN/m och de två andra behandlar en situation utan islast men med en vattennivå till dämningsgränsen respektive en vattennivå till 1 meter över dämningsgränsen. Stabiliteten kontrollerades med avseende på stjälpning och glidning.
Resultatet av stabilitetsberäkningarna visade att för majoriteten av Skålandammens monoliter uppfylls inte stabilitetskraven vid en islast på vare sig 200 eller 100 kN/m. Det visades även att ett fåtal monoliter inte uppfyller säkerhetskraven för glidning vid lastfallet utan islast med en vattennivå till dämningsgränsen, vilket indikerar på att dessa monoliter är för lätta.
De isfrihållande åtgärdsförslagen som jämfördes var IR-element och cirkulering av vattnet med hjälp av luftbubblor och den stabilitetshöjande åtgärden med förspända bergförankringar. Nuvärdet för dessa åtgärder beräknades sedan med antagandet att dammen har en livslängd på 60 år. Resultatet från nuvärdesberäkningen visade att det billigaste alternativet är cirkulering av vattnet men utifrån stabilitetsberäkningarna är det mest fördelaktigt att använda den stabilitetshöjande åtgärden med bergförankringar. Med anledning av detta föreslås ett alternativ med bergförankringar på de monoliter som inte uppfyllde säkerhetskraven vid lastfall utan is i kombination med cirkulering av vattnet som den mest lämpliga åtgärden.
Kinjawadekar, Tejas. "Model-based Design of an Electronic Stability Control System for Passenger Cars Using CarSim and Matlab-Simulink." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1259174786.
Повний текст джерелаSahoo, Pragyan Pradatta. "Analytical and numerical investigations of soil slopes subjected to seismic loadings." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2019. https://ro.ecu.edu.au/theses/2260.
Повний текст джерелаDias, Arildo de Souza 1979. "Arquitetura, historia de vida e infestação por lianas em especies arboreas de florestas semideciduas no municipio de Campinas, SP." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/314966.
Повний текст джерелаDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia
Made available in DSpace on 2018-08-12T18:43:37Z (GMT). No. of bitstreams: 1 Dias_ArildodeSouza_M.pdf: 671371 bytes, checksum: 783000fd26b32c833785efd804fe2f1d (MD5) Previous issue date: 2009
Resumo: Lianas possuem um papel chave na dinâmica de ecossistemas florestais, principalmente no que diz respeito aos efeitos diretos exercidos sobre os forófitos, como diminuição da taxa de crescimento e reprodução e aumento da taxa de mortalidade. Nosso objetivo foi responder a três questões principais: Espécies de árvores têm diferentes susceptibilidades à infestação por lianas? Quais características arquiteturais e de história de vida dos forófitos são correlacionadas com a infestação por lianas? Árvores com 51-100% da copa coberta com lianas apresentam diferenças em alometria e desenho mecânico (fator de segurança e esbelteza do caule), comparadas às árvores congenéricas sem infestação da copa? Utilizamos um conjunto de dados previamente coletados sobre infestação da copa por lianas em 10 fragmentos de florestas semedicíduas no município de Campinas, e acrescentamos informações sobre características arquiteturais e de história de vida para 54 espécies arbóreas. Dezoito espécies apresentaram um número de indivíduos infestados que diferiu significativamente do número médio de árvores infestadas no fragmento. Com base nesses resultados classificamos as espécies em três categorias de susceptibilidade à infestação: alta, baixa e variável. No geral, as espécies arbóreas com maior infestação por lianas foram caracterizadas por altura do fuste baixa, grande profundidade da copa, tipo de casca rugosa a profundamente sulcada e fenologia foliar decídua. Em quatro espécies, os coeficientes alométricos entre altura total e diâmetro das árvores com copas infestadas foram significativamente menores que das árvores livres de lianas, com árvores infestadas mais próximas ao limite teórico de tombamento pelo modelo de similaridade elástica. Em média, o fator de segurança (diâmetro crítico para o tombamento) foi menor para as árvores infestadas. O fator de segurança e a esbelteza do caule estiveram negativamente relacionados tanto em árvores infestadas, quanto em árvores livres de lianas, mas árvores com lianas apresentaram maior valor do coeficiente do que árvores sem lianas. Espécies diferentes têm diferentes susceptibilidades a lianas. A combinação de características arquiteturais e de história de vida em forma de síndromes, como altura do fuste, profundidade da copa, fenologia foliar e tipo de casca, muito mais que cada caráter individual, influi na susceptibilidade à infestação por lianas. O fato de árvores infestadas terem menor estabilidade em relação ao limite teórico de tombamento elástico poderia implicar em maior taxa de mortalidade em relação a árvores livres de lianas.
Abstract: Lianas have a key role in forest dynamics and processes in the ecosystem, and may reduce host tree growth rates, fecundity and survival. We address three main questions: Do tree species differ in their susceptibility to lianas? What host tree architectural and life history traits are correlated with the liana infestation? Tree with 51-100% of crown infestation shows difference in alometry and mechanical design (safety factor and slenderness) in relation to trees without lianas? We utilize a data set on liana infestation in ten semideciduous forest fragments of Campinas city, and we added tree architectural and life history traits for 54 tree species. Eighteen species had a higher or lower proportion of liana-infested individuals than the mean number of infested trees in the forest. The tree species was classified in three categories about to susceptibility: high, low and variable. In general, tree species with higher liana infestation were characterized by a low first branch height, high depth crown, bark type slightly rough to strongly fissured and deciduous leaves. In four species the allometric coefficient for height-diameter relations in liana-infested trees was significantly lower than liana-free trees, and liana-infested trees was more close to minimum diameter required to prevent elastic buckling in wooded columns. The safety factor and slenderness was negatively correlated for liana-infested trees and liana-free trees. However, liana-infested trees had higher slope for relationship between these two variables (safety factor and slenderness). Our results pointed out that the combination of tree architectural and life history traits as free bole height, depth crown, foliar phenology and bark type, more than each isolated feature, are important factors determining to liana infestation of tree species analyzed. We suggest that the lower mechanical stability of liana-infested trees could be a cause to higher mortality rates in those trees in comparison to trees without lianas.
Mestrado
Mestre em Biologia Vegetal
Archibald, Timothy, and Stacy Brown. "One year monitoring of potency change in commercial ibuprofen products stored in a household setting exposed to normal day-to-day temperature and humidity fluctuations." Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/asrf/2019/schedule/161.
Повний текст джерелаLawson, Sarah E. "Investigation of the Chemical Protection Capacity of Common Shoe Materials in Undergraduate Laboratories." Digital Commons @ East Tennessee State University, 2015. https://dc.etsu.edu/honors/268.
Повний текст джерелаBribiesca, argomedo Fédérico. "Contrôle et stabilité Entrée-Etat en dimension infinie du profil du facteur de sécurité dans un plasma Tokamak Infinite dimensional control and Input-to-State stability of the safety factor profile in a Tokamak plasma." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00920942.
Повний текст джерелаSourzat, Lucie. "Le contrat administratif résilient." Thesis, Toulouse 1, 2017. http://www.theses.fr/2017TOU10037.
Повний текст джерелаResilience can be defined as the ability to successfully adapt to changing conditions despite risks and adversity. How would function the digital economy and the public works sector today, if we were not sure that the networks and the infrastructures which provide their services are able to face any potential external attack? And how could we be sure of this, if we had not taken all the precautions required by such a situation in the contracts that have enable to build them? The purpose of the present work is precisely to show that the administrative contract is "resilient", in the sense that it is able to deal with the vagaries that may affect it, to adapt to them, to resist to them, to anticipate them, and even better, to incorporate them. What particularly makes the originality of the administrative contract is the existence of a number of principles of public order and legal mechanisms, which enable it both to handle any vagary and to remain stable when faced to contingency. Thus, the first two criteria for resilience: the adaptation and the resistence to vagaries, seem to be met. The evolution of the context in which administrative contracts are signed, as well as the influence of the basic principles of competitive public order, have however shown that these mechanisms seem insufficient. Without making them disappear, new complementary solutions have thus emerged. The notion of prevention has been progressively placed at the heart of administrative contracts. It highlights the presence of two other criteria for resilience: the anticipation and the integration of vagaries. Thus, as the four criteria for resilience are met by administrative contracts, a new concept known as "resilient administrative contract" seems to be emerging, which contributes to make the administrative contract safer and less singular
Bissen, Edouard. "Semi-analytical methodology for stability and bifurcation analysis in a low pressure boiling channel for GEN4 SFR safety R&D on two-phase flow limit cycles." Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0417.
Повний текст джерелаThe objective of the study undertaken in this work is to better understand the highly non-linear behaviour of two-phase flows (liquid-vapour). The establishment of bifurcation diagrams for simple academic configurations (flows in a vertical cylindrical tube, heated at its wall) is therefore an important first step in the implementation of our numerical approach. To achieve this objective, we have developed a methodological approach, which we believe is quite original in this field, since it is based on a semi-analytical method of solving the simplified equations of the problem (one-dimensional drift model). The implemented continuation method is based on the numerical asymptotic method, which allows us to calculate with good numerical efficiency (good accuracy and low computation times) the stationary solutions of the base flow over the entire range of interest (liquid single phase, liquid-vapour two phase, steam single phase). When the branch of stationary solutions is calculated in this way, we then carry out a linear stability analysis, the only part in which any linearization step is introduced. The model is then used to conduct parametric studies to highlight the most influential parameters on flow stability, facilitating the physical understanding of the mechanisms at play
Sasraku, Francis M. "Regulatory Structures and Bank –Level Risk Management in Ghanaian Banks." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/15021.
Повний текст джерелаLins, Paulo Gustavo Cavalcante. "Considerações sobre a aplicação do método dos elementos finitos à análise de estabilidade de taludes." Universidade de São Paulo, 1996. http://www.teses.usp.br/teses/disponiveis/18/18132/tde-25082016-161453/.
Повний текст джерелаThe present work shows a study about computation of slope stability safety factors using stress fields generated by finite element method analysis. Differents definitions of the global safety factor are discussed. Considerations about the definition of the safety factor in terms of nodal displacements are addressed too. A graphical software for visualizing the results of finite element method analysis was developed for this study. Studys of a stable slope and a failure case are performed. Safety factors values were both consistent with results of conventional limit equilibrium methods. Influence of relative deformability is analyzed in the stable case.
Isakson, Brian Louis. ""Getting better" after torture from the perspective of the survivor." unrestricted, 2008. http://etd.gsu.edu/theses/available/etd-07162008-102405/.
Повний текст джерелаTitle from file title page. Gregory Jurkovic, committee chair; Roderick Watts, Julia Perilla, Gregory Brack, committee members. Electronic text ( 197 p.) : digital, PDF file. Description based on contents viewed October 8, 2008. Includes bibliographical references (p. 164-186).
Ji, Jinnan. "Finite elements modelling and analysis of the effect of vegetation on forested slopes stability." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20213.
Повний текст джерелаEcological engineering, which is described as ‘the management of nature', was first proposed by Odum in 1971. In the past few decades, ecological engineering has been largely devoted to combat soil erosion and mass movement all over the world, because of its benefit on sustainable ecosystems. The objective of this thesis is to evaluate the impact of forest stands on the stability of finite slopes, considering both the mechanical and hydrological effects of roots against shallow landslides. Two monospecific and even-aged forest sites planted with Robinia pseudoacacia and Platycladus orientalis respectively were selected on the Loess Plateau of China and used as study sites. Slope Factors of Safety were calculated using a 2D finite element model that takes into account the distribution of roots in the shallow layers of soil.Field site experiments and laboratory tests were performed in order to estimate the main parameters of the model, i.e. distribution of root area ratio within the soil, root tensile strength, as well as bare soil mechanical and hydrological properties. The contribution of roots to soil shear strength was considered through an additional cohesion calculated with models provided by the literature. Six existing models were tested. This thesis is composed of two main chapters that make the focus on : (1) the mechanical effect of the spatial heterogeneity of root distribution at the slope scale; (2) the influence of root distribution on the coupling between pore fluid diffusion and mechanical stress and its impact on slope stability. This study brings to the following main conclusions: (1) terraced slopes were 20% more stable than rectilinear slopes, disregarding the differences in hydrological regimes between the two sites; (2) FoS could reach an asymptotic value when increasing root additional cohesion; (3) variations of the actual root cohesion do not affect much slope stability. However more attention should be given to the reinforcement of the bottom part of the actual slopes, where roots have a larger positive impact on the FoS; (4) the effect of heavy precipitations on slope stability could probably be overcome or at least mitigated by root system network, but this depends on root characteristics and their resulting effect on soil water flow
Štainerová, Lenka. "Návrh zajištění hlubokého zářezu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227640.
Повний текст джерела