Rozprawy doktorskie na temat „Snapshoot”
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Xie, Jiahua. "Moment beyond moment". Click here to access this resource online, 2008. http://hdl.handle.net/10292/452.
Pełny tekst źródłaSabatke, Derek S. "Snapshot spectropolarimetry". Diss., The University of Arizona, 2002. http://hdl.handle.net/10150/289859.
Pełny tekst źródłaHagen, Nathan. "Snapshot imaging spectropolarimetry". Diss., The University of Arizona, 2007. http://hdl.handle.net/10150/195957.
Pełny tekst źródłaBryntesson, Fredrik. "Snapshot Algorithm Animation with Erlang". Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-211087.
Pełny tekst źródłaCahill, Michael James. "Serializable Isolation for Snapshot Databases". University of Sydney, 2009. http://hdl.handle.net/2123/5353.
Pełny tekst źródłaMany popular database management systems implement a multiversion concurrency control algorithm called snapshot isolation rather than providing full serializability based on locking. There are well-known anomalies permitted by snapshot isolation that can lead to violations of data consistency by interleaving transactions that would maintain consistency if run serially. Until now, the only way to prevent these anomalies was to modify the applications by introducing explicit locking or artificial update conflicts, following careful analysis of conflicts between all pairs of transactions. This thesis describes a modification to the concurrency control algorithm of a database management system that automatically detects and prevents snapshot isolation anomalies at runtime for arbitrary applications, thus providing serializable isolation. The new algorithm preserves the properties that make snapshot isolation attractive, including that readers do not block writers and vice versa. An implementation of the algorithm in a relational database management system is described, along with a benchmark and performance study, showing that the throughput approaches that of snapshot isolation in most cases.
Tebow, Christopher. "A Tunable Snapshot Imaging Spectrometer". Diss., Tucson, Arizona : University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1023%5F1%5Fm.pdf&type=application/pdf.
Pełny tekst źródłaVolin, Curtis Earl. "Portable snapshot infrared imaging spectrometer". Diss., The University of Arizona, 2000. http://hdl.handle.net/10150/289203.
Pełny tekst źródłaAumiller, Riley. "Longwave Infrared Snapshot Imaging Spectropolarimeter". Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/301708.
Pełny tekst źródłaLuo, Haitao. "Snapshot Imaging Polarimeters Using Spatial Modulation". Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/193905.
Pełny tekst źródłaMihoubi, Sofiane. "Snapshot multispectral image demosaicing and classification". Thesis, Lille 1, 2018. http://www.theses.fr/2018LIL1I062/document.
Pełny tekst źródłaMultispectral cameras sample the visible and/or the infrared spectrum according to narrow spectral bands. Available technologies include snapshot multispectral cameras equipped with filter arrays that acquire raw images at video rate. Raw images require a demosaicing procedure to estimate a multispectral image with full spatio-spectral definition. In this manuscript we review multispectral demosaicing methods and propose a new one based on the pseudo-panchromatic image. We highlight the influence of illumination on demosaicing performances, then we propose pre- and post-processing normalization steps that make demosaicing robust to acquisition properties. Experimental results show that our method provides estimated images of better objective quality than classical ones.Multispectral images can be used for texture classification. To perform texture analysis, we extend local binary pattern operators to multispectral texture images at the expense of increased memory and computation requirements. We propose to compute texture descriptors directly from raw images, which both avoids the demosaicing step and reduces the descriptor size. In order to assess classification on multispectral images we have proposed the first significant multispectral database of close-range textures in the visible and near infrared spectral domains. Extensive experiments on this database show that the proposed descriptor has both reduced computational cost and high discriminating power with regard to classical local binary pattern descriptors applied to demosaiced images
Vosandi, Lauri. "Efficient and Reliable Filesystem Snapshot Distribution". Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-177471.
Pełny tekst źródłaValdez, Ashley. "Snapshot Spectral Domain Optical Coherence Tomography". Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/613413.
Pełny tekst źródłaSardar, Zeeshan Mohammad. "Snapshot based concurrency control protocols for XML". Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=98790.
Pełny tekst źródłaAlomari, Mohammad. "Ensuring Serializable Executions with Snapshot Isolation DBMS". University of Sydney, 2009. http://hdl.handle.net/2123/4211.
Pełny tekst źródłaSnapshot Isolation (SI) is a multiversion concurrency control that has been implemented by open source and commercial database systems such as PostgreSQL and Oracle. The main feature of SI is that a read operation does not block a write operation and vice versa, which allows higher degree of concurrency than traditional two-phase locking. SI prevents many anomalies that appear in other isolation levels, but it still can result in non-serializable execution, in which database integrity constraints can be violated. Several techniques have been proposed to ensure serializable execution with engines running SI; these techniques are based on modifying the applications by introducing conflicting SQL statements. However, with each of these techniques the DBA has to make a difficult choice among possible transactions to modify. This thesis helps the DBA’s to choose between these different techniques and choices by understanding how the choices affect system performance. It also proposes a novel technique called ’External Lock Manager’ (ELM) which introduces conflicts in a separate lock-manager object so that every execution will be serializable. We build a prototype system for ELM and we run experiments to demonstrate the robustness of the new technique compare to the previous techniques. Experiments show that modifying the application code for some transactions has a high impact on performance for some choices, which makes it very hard for DBA’s to choose wisely. However, ELM has peak performance which is similar to SI, no matter which transactions are chosen for modification. Thus we say that ELM is a robust technique for ensure serializable execution.
Peng, Gang. "A distributed snapshot protocol for virtual machines". Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/32049.
Pełny tekst źródłaScience, Faculty of
Computer Science, Department of
Graduate
Locke, Ann M. "Design and analysis of a snapshot imaging spectropolarimeter". Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/280365.
Pełny tekst źródłaParker, Alistair. "Snapshot photography : a phatic, socially constructed mnemonic technology". Thesis, Lancaster University, 2017. http://eprints.lancs.ac.uk/88475/.
Pełny tekst źródłaSaghazadeh, Sahar. "Implementing a state snapshot for the EMCA Simulator". Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-147543.
Pełny tekst źródłaShi, Jeff, Tony Mao, James Chesney i Nicholas Speciale. "Fast Auroral Snapshot Explorer (FAST) Packet Processing System". International Foundation for Telemetering, 1993. http://hdl.handle.net/10150/611832.
Pełny tekst źródłaThis paper describes the design of a space telemetry level zero processing system for National Aeronautics and Space Administration's (NASA's) Fast Auroral Snapshot Explorer (FAST) science mission. The design is based on a prototype Very Large Scale Integration (VLSI) level zero processing system, and utilizes VLSI telemetry data processing functional components, VLSI system technologies, and Object-Oriented Programming. The system performs level zero processing functions based on Consultative Committee for Space Data Systems (CCSDS) data format [1], and features high data processing rates, highly automated operations, and Open Software Foundation (OSF)/Motif based Graphical User Interface (GUI).
Geierman, Joseph. "Facility management during the 2009 recession a snapshot view /". Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31663.
Pełny tekst źródłaCommittee Chair: Roper, Kathy; Committee Member: Castro-Lacouture, Daniel; Committee Member: Thomas-Mobley, Linda. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Chao, Da-Wei David. "Development and evaluation of remote database snapshot refresh methods /". Thesis, Connect to this title online; UW restricted, 1990. http://hdl.handle.net/1773/8830.
Pełny tekst źródłaFernandez, Ramos Javier. "Snapshot multispectral oximetry using image replication and birefringent spectrometry". Thesis, University of Glasgow, 2017. http://theses.gla.ac.uk/8162/.
Pełny tekst źródłaAnderson, J. L. "A COMPACT 500 MS/SEC WIDEBAND SNAPSHOT RECORDER/WORKSTATION". International Foundation for Telemetering, 1991. http://hdl.handle.net/10150/613051.
Pełny tekst źródłaThis paper describes the design of the TCM Plus, an integrated 500 MSample/second snapshot recording system that achieves high performance in a compact, modular implementation. The system can record and playback analog and digital signals at sample rates from 10 KHz - 500 MHZ with RAM-based storage of up to 256 MBytes. High density multi-layer circuit card designs and custom and semi-custom chips were required to meet the physical size design objective of a 7" high rack mount chassis for the memory unit. A highly graphical computer with standard busses was imbedded as the system controller, resulting in the capability to tightly couple wideband acquisition with signal processing application software which can turn the system into an ultrahigh performance signal processing workstation.
Fleischer, Candace C. "A molecular snapshot of charged nanoparticles in the cellular environment". Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53632.
Pełny tekst źródłaAlmeida, Fábio Renato de [UNESP]. "Gerenciamento de transação e mecanismo de serialização baseado em Snapshot". Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/122161.
Pełny tekst źródłaDentre os diversos níveis de isolamento sob os quais uma transação pode executar, Snapshot se destaca pelo fato de lidar com uma visão isolada da base de dados. Uma transação sob o isolamento Snapshot nunca bloqueia e nunca é bloqueada quando solicita uma operação de leitura, permitindo portanto uma maior concorrência quando a mesma é comparada a uma execução sob um isolamento baseado em bloqueios. Entretanto, Snapshot não é imune a todos os problemas decorrentes da concorrência e, portanto, não oferece garantia de serialização. Duas estratégias são comumente empregadas para se obter tal garantia. Na primeira delas o próprio Snapshot é utilizado, mas uma alteração estratégica na aplicação e na base de dados, ou até mesmo a inclusão de um componente de software extra, são empregados como auxiliares para se obter apenas históricos serializáveis. Outra estratégia, explorada nos últimos anos, tem sido a construção de algoritmos fundamentados no protocolo de Snapshot, mas adaptados de modo a impedir as anomalias decorrentes do mesmo e, portanto, garantir serialização. A primeira estratégia traz como vantagem o fato de se aproveitar os benefícios de Snapshot, principalmente no que diz respeito ao monitoramento apenas dos elementos que são escritos pela transação. Contudo, parte da responsabilidade em se lidar com problemas de concorrência é transferida do Sistema Gerenciador de Banco de Dados (SGBD) para a aplicação. Por sua vez, a segunda estratégia deixa apenas o SGBD como responsável pelo controle de concorrência, mas os algoritmos até então apresentados nesta categoria tem exigido também o monitoramento dos elementos lidos. Neste trabalho é desenvolvida uma técnica onde os benefícios de Snapshot são mantidos e a garantia de serialização é obtida sem a necessidade de adaptação do código da aplicação ou da introdução de uma camada de software extra. A técnica proposta é ...
Among the various isolation levels under which a transaction can execute, Snapshot stands out because of its capacity to work on an isolated view of the database. A transaction under the Snapshot isolation never blocks and is never blocked when requesting a read operation, thus allowing a higher level of concurrency when it is compared to an execution under a lock-based isolation. However, Snapshot is not immune to all the problems that arise from the competition, and therefore no serialization warranty exists. Two strategies are commonly employed to obtain such assurance. In the first one Snapshot itself is used, but a strategic change in the application and database, or even the addition of an extra software component, are employed as assistants to get only serializable histories. Another strategy, explored in recent years, has been the coding of algorithms based on the Snapshot protocol, but adapted to prevent the anomalies arising from it, and therefore ensure serialization. The first strategy has the advantage of exploring the benefits of Snapshot, especially with regard to monitoring only the elements that are written by the transaction. However, part of the responsibility for dealing with competition issues is transferred from the Database Management System (DBMS) to the application. In turn, the second strategy leaves only the DBMS as responsible for concurrency control, but the algorithms presented so far in this category also require the monitoring of the elements that the transaction reads. In this work we developed a technique where the benefits of Snapshot use are retained and serialization warranty is achieved without the need for adaptation of application code or the addition of an extra software layer. The proposed technique is implemented in a prototype of a DBMS that has temporal features and has been built to demonstrate the applicability of the technique in systems that employ the object-oriented model. However, the ...
Almeida, Fábio Renato de. "Gerenciamento de transação e mecanismo de serialização baseado em Snapshot /". São José do Rio Preto, 2014. http://hdl.handle.net/11449/122161.
Pełny tekst źródłaBanca: Elaine Parros Machado de Sousa
Banca: Rogéria Cristiane Gratão de Souza
Resumo: Dentre os diversos níveis de isolamento sob os quais uma transação pode executar, Snapshot se destaca pelo fato de lidar com uma visão isolada da base de dados. Uma transação sob o isolamento Snapshot nunca bloqueia e nunca é bloqueada quando solicita uma operação de leitura, permitindo portanto uma maior concorrência quando a mesma é comparada a uma execução sob um isolamento baseado em bloqueios. Entretanto, Snapshot não é imune a todos os problemas decorrentes da concorrência e, portanto, não oferece garantia de serialização. Duas estratégias são comumente empregadas para se obter tal garantia. Na primeira delas o próprio Snapshot é utilizado, mas uma alteração estratégica na aplicação e na base de dados, ou até mesmo a inclusão de um componente de software extra, são empregados como auxiliares para se obter apenas históricos serializáveis. Outra estratégia, explorada nos últimos anos, tem sido a construção de algoritmos fundamentados no protocolo de Snapshot, mas adaptados de modo a impedir as anomalias decorrentes do mesmo e, portanto, garantir serialização. A primeira estratégia traz como vantagem o fato de se aproveitar os benefícios de Snapshot, principalmente no que diz respeito ao monitoramento apenas dos elementos que são escritos pela transação. Contudo, parte da responsabilidade em se lidar com problemas de concorrência é transferida do Sistema Gerenciador de Banco de Dados (SGBD) para a aplicação. Por sua vez, a segunda estratégia deixa apenas o SGBD como responsável pelo controle de concorrência, mas os algoritmos até então apresentados nesta categoria tem exigido também o monitoramento dos elementos lidos. Neste trabalho é desenvolvida uma técnica onde os benefícios de Snapshot são mantidos e a garantia de serialização é obtida sem a necessidade de adaptação do código da aplicação ou da introdução de uma camada de software extra. A técnica proposta é ...
Abstract: Among the various isolation levels under which a transaction can execute, Snapshot stands out because of its capacity to work on an isolated view of the database. A transaction under the Snapshot isolation never blocks and is never blocked when requesting a read operation, thus allowing a higher level of concurrency when it is compared to an execution under a lock-based isolation. However, Snapshot is not immune to all the problems that arise from the competition, and therefore no serialization warranty exists. Two strategies are commonly employed to obtain such assurance. In the first one Snapshot itself is used, but a strategic change in the application and database, or even the addition of an extra software component, are employed as assistants to get only serializable histories. Another strategy, explored in recent years, has been the coding of algorithms based on the Snapshot protocol, but adapted to prevent the anomalies arising from it, and therefore ensure serialization. The first strategy has the advantage of exploring the benefits of Snapshot, especially with regard to monitoring only the elements that are written by the transaction. However, part of the responsibility for dealing with competition issues is transferred from the Database Management System (DBMS) to the application. In turn, the second strategy leaves only the DBMS as responsible for concurrency control, but the algorithms presented so far in this category also require the monitoring of the elements that the transaction reads. In this work we developed a technique where the benefits of Snapshot use are retained and serialization warranty is achieved without the need for adaptation of application code or the addition of an extra software layer. The proposed technique is implemented in a prototype of a DBMS that has temporal features and has been built to demonstrate the applicability of the technique in systems that employ the object-oriented model. However, the ...
Mestre
Wilmsen, Dominik. "Derivation of Change from Sequences of Snapshots". Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/WilmsenD2006.pdf.
Pełny tekst źródłaStevens, Charlotte. "Snapshots from the cultural history of taste". Thesis, Loughborough University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.416724.
Pełny tekst źródłaStender, Jan. "Snapshots in large-scale distributed file systems". Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2013. http://dx.doi.org/10.18452/16660.
Pełny tekst źródłaSnapshots are present in many modern file systems, where they allow to create consistent on-line backups, to roll back corruptions or inadvertent changes of files, and to keep a record of changes to files and directories. While most previous work on file system snapshots refers to local file systems, modern trends like cloud and cluster computing have shifted the focus towards distributed storage infrastructures. Such infrastructures often comprise large numbers of storage servers, which presents particular challenges in terms of scalability, availability and failure tolerance. This thesis describes snapshot algorithm for large-scale distributed file systems and its integration in XtreemFS, a scalable object-based file system for grid and cloud computing environments. The two building blocks of the algorithm are a version management scheme, which efficiently records versions of file content and metadata, as well as a scalable and failure-tolerant mechanism that aggregates specific versions in a snapshot. To overcome the lack of a global time in a distributed system, the algorithm implements a relaxed consistency model for snapshots, which is based on timestamps assigned by loosely synchronized server clocks. The main contributions of the thesis are: 1) a formal model of snapshots and snapshot consistency in distributed file systems; 2) the description of efficient schemes for the management of metadata and file content versions in object-based file systems; 3) the formal presentation of a scalable, fault-tolerant snapshot algorithm for large-scale object-based file systems; 4) a detailed description of the implementation of the algorithm as part of XtreemFS. An extensive evaluation shows that the proposed algorithm has no severe impact on user I/O, and that it scales to large numbers of snapshots and versions.
Grieve, Stuart Michael. "Development of fast magnetic resonance imaging methods for investigation of the brain". Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365824.
Pełny tekst źródłaHowell, Randy Keith. "d-MUSIC : an algorithm for single snapshot direction-of-arrival estimation". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ37346.pdf.
Pełny tekst źródłaDockter, Rhyan B. "Genome Snapshot and Molecular Marker Development in Penstemon (Plantaginaceae)". BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2512.
Pełny tekst źródłaKraay, Andrea L. (Andrea Lorraine) 1976. "Physically constrained maximum likelihood method for snapshot deficient adaptive array processing". Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/87331.
Pełny tekst źródła"February 2003."
Includes bibliographical references (leaves 139-141).
by Andrea L. Kraay.
Elec.E.and S.M.in Electrical Engineering
Chamberland, Meredith Scotti. "The wait-list game: a snapshot of those left in limbo". Thesis, Boston University, 2013. https://hdl.handle.net/2144/10959.
Pełny tekst źródłaUndergraduate admissions in the United States is a multibillion dollar industry involving families, higher education institutions, journalists, testing companies, test preparation companies, private consultants, marketing firms, high school guidance counselors, high school teachers, coaches, financial advisors, and publicly funded programs. Pushing all of the citizens ofthe United States towards postsecondary education has been a goal of many presidents. In an effort to achieve this goal, colleges and universities utilize wait lists so that no seat goes unfilled. Five high school guidance counselors, ten students and one of their parents, and ten college and university admissions personnel participated in this study. The students and parents all come from one private high school in the northeast. Guidance counselors from one public and one private high school participated. The interviews with ten admissions personnel include four-year public and private colleges and universities in the United States. Qualitative methods consisted of audio-recorded interviews, which were later transcribed and coded. Data were analyzed for common themes and were found among each of the population groups. There are four noteworthy findings. Students want wait lists to exist because they provide an opportunity for acceptance that would otherwise not exist. Parents want wait lists to exist, but they want policy reform that requires colleges and universities to be consistent in their communication. High school counselors call for more transparency and information regarding how college and university admissions offices create wait lists and how students are chosen for enrollment from the wait lists. Lastly, college admissions representatives primarily use wait lists to meet enrollment targets, but may also use wait lists to keep acceptance percentages lower, increase yield percentages, and admit only viable financial candidates. These findings suggest that the NACAC Statement of Principles of Good Practice needs revision to include more guidelines about communication with wait-listed students and their families, a need for Masters Programs that lead to certification as a high school counselor to include a course on college admissions counseling, a need for the US News and World Report to eliminate acceptance percentages as an evaluative measure of quality in its college rankings.
Gryspeerdt, Edward, Tom Goren i Tristan W. P. Smith. "Observing the timescales of aerosol–cloud interactions in snapshot satellite images". Copernicus Publications, 2021. https://ul.qucosa.de/id/qucosa%3A74863.
Pełny tekst źródłaRobertson, Stephanie. "Microstructural manipulation by laser irradiation of prepared samples : The ’Snapshot Method’". Licentiate thesis, Luleå tekniska universitet, Produkt- och produktionsutveckling, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-76150.
Pełny tekst źródłaMoore, Ashley Hale. "Moments". The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306709446.
Pełny tekst źródłaKatebi, Ataur Rahim. "Supporting snapshots in a log-based file system". [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0008900.
Pełny tekst źródłaMoh, Chuang-Hue 1975. "Snapshots in a distributed persistent object storage system". Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/87361.
Pełny tekst źródłaPersson, Andreas, i Lukas Landenstad. "Explaining change : Comparing network snapshots for vulnerability management". Thesis, Blekinge Tekniska Högskola, Institutionen för datalogi och datorsystemteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-16710.
Pełny tekst źródłaBakgrund. Sårbarhetshantering underlättar arbetet för företag att hitta, hantera och korrigera sårbarheter i ett nätverk. Det görs genom att skanna nätverket efter kända sårbarheter. Mängden information som samlas under skanningar kan vara stor och medföra till att analysprocessen av upptäckterna försenas. Resultaten av de upptäckta sårbarheterna brukar vanligtvis presenteras som en trend av antalet funna sårbarheter över ett tidsintervall. Trenderna förklarar dock inte andledningen till de funna sårbarheterna. Syfte. Målet med denna avhandling är att undersöka hur det är möjligt att identifiera anledningen till skillnaden i funna sårbarheter genom att jämföra sårbarhetsrapporter från olika tidpunkter. Ett andra mål är att utveckla ett automatiskt system som kopplar skillnaderna i funna sårbarheter till specifika händelser i nätverket. Metod. En fallstudie utfördes där tre sårbarhetsrapporter, från Outpost24s interna testnätverk, undersöktes för att få förståelse kring strukturen av rapporterna samt för att koppla upptäckter i rapporterna till händelser. För att komplementera fallstudien satte vi upp ett nytt, simulerat testnätverk för att kunna utföra egna tester samt för att uppnå en högre precision vid identifiering av förändringar. Resultat. Utifrån fallstudien fick vi förståelse för hur vi skulle tolka informationen från rapporterna samt för hur man kan ge orsak till förändring genom ett regelbaserad system. Informationen från rapporterna tolkades och förändringarna delades in i tre olika kategorier; tillagda, borttagna eller modifierade. Utifrån testerna från det simulerade nätverket byggdes signaturer som identifierar orsak till föränding av funna sårbarheter. Signaturerna användes sedan för att göra regler, vilka implementerades i ett konceptverktyg. Konceptverktyget jämförde sårbarhetsrapporter i par för att upptäcka skillnader. De identifierade skillnaderna försökte sedan matchas ihop med reglerna och skulle skillnaden inte matcha någon regel så flaggas skillnaden som ''oförklarad''. Konceptverktyget användes slutligen för att finna orsak till förändringar i rapporterna från fallstudien. Ramverket validerates genom att utvärdera hur reglerna byggda utifrån det simulerade nätverket presterade för fallstudien. En domänexpert verifierade att händelserna som presenterades och orsaken till förändringarna var korrekta genom att analysera sårbarhetsrapporterna från fallstudien manuellt. Slutsatser. Det är möjligt att identifiera orsak till förändringar i upptäckta sårbarheter i sårbarhetsrapporter genom att identifiera signaturer för händelser, och använda dessa signaturer i ett reglerbaserat system. Systemet är också möjligt att implementera automatiskt, i form av mjukvara, för att kunna identifiera orsaken till förändring snabbare än om det skulle gjorts manuellt.
Misyak, Sarah A. "Development of a SNP Assay for the Differentiation of Allelic Variations in the mdx Dystrophic Mouse Model". Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/32325.
Pełny tekst źródłaMaster of Science
Gorman, Alistair S. "Snapshot spectral imaging using image replication and birefringent interferometry : principles and applications". Thesis, Heriot-Watt University, 2011. http://hdl.handle.net/10399/2480.
Pełny tekst źródłaTuku, Woldu. "Distributed state estimation using phasor measurement units (PMUs)for a system snapshot". Kansas State University, 2012. http://hdl.handle.net/2097/14129.
Pełny tekst źródłaDepartment of Electrical and Computer Engineering
Noel N. Schulz
As the size of electric power systems are increasing, the techniques to protect, monitor and control them are becoming more sophisticated. Government, utilities and various organizations are striving to have a more reliable power grid. Various research projects are working to minimize risks on the grid. One of the goals of this research is to discuss a robust and accurate state estimation (SE) of the power grid. Utilities are encouraging teams to change the conventional way of state estimation to real time state estimation. Currently most of the utilities use traditional centralized SE algorithms for transmission systems. Although the traditional methods have been enhanced with advancement in technologies, including PMUs, most of these advances have remained localized with individual utility state estimation. There is an opportunity to establish a coordinated SE approach integration using PMU data across a system, including multiple utilities and this is using Distributed State Estimation (DSE). This coordination will minimize cascading effects on the power system. DSE could be one of the best options to minimize the required communication time and to provide accurate data to the operators. This project will introduce DSE techniques with the help of PMU data for a system snapshot. The proposed DSE algorithm will split the traditional central state estimation into multiple local state estimations and show how to reduce calculation time compared with centralized state estimation. Additionally these techniques can be implemented in micro-grid or islanded system.
Alverson, Matthew. "A Verbal Snapshot of Visual Scrutiny Primarily in the Sphere of Art". VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2155.
Pełny tekst źródłaReichwaldt, Kai. "Snapshots from Between : Non-binary identity construction on Instagram". Thesis, Umeå universitet, Umeå centrum för genusstudier (UCGS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-153425.
Pełny tekst źródłaBarr, Kenneth C. (Kenneth Charles) 1978. "Summarizing multiprocessor program execution with versatile, microarchitecture-independent snapshots". Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/38224.
Pełny tekst źródłaIncludes bibliographical references (p. 131-137).
Computer architects rely heavily on software simulation to evaluate, refine, and validate new designs before they are implemented. However, simulation time continues to increase as computers become more complex and multicore designs become more common. This thesis investigates software structures and algorithms for quickly simulating modern cache-coherent multiprocessors by amortizing the time spent to simulate the memory system and branch predictors. The Memory Timestamp Record (MTR) summarizes the directory and cache state of a multiprocessor system in a compact data structure. A single MTR snapshot is versatile enough to reconstruct the microarchitectural state resulting from various coherence protocols and cache organizations. The MTR may be quickly updated by each simulated processor during a fast-forwarding phase and optionally stored off-line for reuse. To fill large branch prediction tables, we introduce Branch Predictor-based Compression (BPC) which compactly stores a branch trace so that it may be used to fill in any branch predictor structure. An entire BPC trace requires less space than single discrete predictor snapshots, and it may be decompressed 3-6x faster than performing functional simulation.
by Kenneth C. Barr.
Ph.D.
Labuschagne, Jeanine. "Molecular methods for genotyping selected detoxification and DNA repair enzymes / J. Labuschagne". Thesis, North-West University, 2010. http://hdl.handle.net/10394/4599.
Pełny tekst źródłaThesis (M.Sc. (Biochemistry))--North-West University, Potchefstroom Campus, 2011.
Santos, Simone Teixeira Bonecker dos. "Estudo da estrutura e filogenia da população do Rio de Janeiro através de SNPs do cromossomo Y". reponame:Repositório Institucional da FIOCRUZ, 2010. https://www.arca.fiocruz.br/handle/icict/6306.
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Fundação Oswaldo Cruz.Instituto Oswaldo Cruz. Rio de janeiro, RJ, Brasil
A população brasileira é considerada miscigenada, derivada de um processo relativamente recorrente e recente. Aqui viviam milhões de indígenas quando começou o processo colonizatório envolvendo integrantes europeus, principalmente portugueses do sexo masculino, tornando comum o acasalamento entre homens europeus e mulheres indígenas, começando assim a heterogeneidade étnica encontrada em nossa população. Posteriormente com a chegada dos escravos, durante o ciclo econômico da cana-de-açúcar, começou a ocorrer relacionamentos entre europeus e africanas. Basicamente, trata-se de uma população tri-híbrida que atualmente apresenta em sua composição outros grupos, entre eles: italianos, espanhóis, sírios, libaneses e japoneses. Para o melhor entendimento das raízes filogenéticas brasileiras, foram utilizados neste estudo marcadores bi-alélicos da região não recombinante do cromossomo Y. O objetivo foi analisar como esses grupos heterogêneos contribuíram para o pool genético de origem paterna encontrado na população masculina do Rio de Janeiro, e assim enriquecer os conhecimentos acerca dos movimentos migratórios no processo de estruturação desta população. Foram analisados, através do minissequenciamento multiplex, 13 polimorfismos de base única (SNPs) e foi possível a identificação de nove haplogrupos e quatro sub-haplogrupos, em uma amostra de 200 indivíduos não aparentados e residentes do Estado do Rio de Janeiro, escolhidos aleatoriamente entre participantes de estudos de paternidade da Defensoria Pública do Rio de Janeiro. Dos haplogrupos analisados, somente o R1a, não foi observado em nossa população. O haplogrupo mais representativo foi o de origem européia, o R1b1, com 51%, enquanto o menos representativo, com 1% foi o Q1a3a, encontrado entre os nativos americanos. Cerca de 85% dos cromossomos Y analisados são de origem européia; 10,5% de africanos e 1% de ameríndios, e o restante são de origem indefinida. Ao comparamos com dados da literatura nossa população mostrou-se semelhante a população branca de Porto Alegre e nenhuma diferença significativa foi encontrada entre o pool gênico da população masculina do Rio de Janeiro com a portuguesa. Os resultados aqui encontrados corroboram os dados históricos da fundação da população do Rio de Janeiro durante o século XVI, período onde foi observada uma significante redução da população ameríndia, com importante contribuição demográfica vinda da região Subsaariana da África e Europa, principalmente de portugueses. Tendo em vista o alto grau de miscigenação da nossa população e os avanços na medicina personalizada, estudos sobre a estrutura genética humana têm fundamental implicação no entendimento na evolução e no impacto em doenças humanas, uma vez que para esta abordagem, a coloração da pele é um preditor não confiável de ancestralidade étnica do indivíduo.
The Brazilian population is highly admixture, a relatively recurrent and recent process. Millions of indigenous people had been living here when the colonization process began, initially involving mainly Portuguese men. The immigration of European women during the first centuries was insignificant, making common the marriage between European men with indigenous women; hence, starting the ethnic heterogeneity found in our population nowadays. Subsequently, with the arrival of slaves during the economic cycle of sugarcane, began the relationships between Europeans and Africans. Basically, it is a tri-hybrid population with contributions from other groups, such as Italians, Germans, Syrians, Lebanese and Japanese. For a better understanding of Brazilian phylogenetic roots, biallelic markers of nonrecombining region of the Y chromosome were used in this study. The goal was to analyze how these heterogeneous groups contributed to the genetic pool found present-day in the population of Rio de Janeiro, and thus contribute to the understanding of migratory movements in the process of structuring this population. We analyzed, through minisequencing multiplex, 13 single nucleotide polymorphisms (SNPs) and through those it was able to identify nine haplogrupos and four subhaplogrupos, in a sample of 200 unrelated individuals, residents of the State of Rio de Janeiro, chosen randomly between participants from studies of fatherhood. Of the haplogrupos examined, only the R1a, has not been observed in our population. The more representative haplogroup was from European origin, the R1b1, with 51%, while the less representative, with 1% was the Q1a3a, found among Native Amerindians. 85% of Y chromosomes analyzed were from Europeans; 10.5% from Africans and 1% of Native Amerindians, and the rest have not had their origin defined. In this study sample, the vast majority of Y-chromosomes proved to be of European origin. Indeed, there were no significant differences when the haplogroup frequencies in Brazil and Portugal were compared by means of an exact test of population differentiation. These results corroborate historical data of the foundation of the population of Rio de Janeiro during the 16th century, a period where it was observed a significant reduction of Amerindian population was observed with important contribution from the Sub-Saharan region of Africa and Europe, particularly the Portuguese. In view of the high degree of admixture of oBrazilian population and advances in medicine, customized research on human genetic structure have fundamental implication in understanding the evolution and impact on human diseases, since for this approach, the skin color is an unreliable ancestry predictor of individual ethnic
Monteiro, Guilherme Arthur Brunet. "Estratégia de manutenção em uma oficina de cilindros de laminação de aços longos". Universidade Federal de Pernambuco, 2013. https://repositorio.ufpe.br/handle/123456789/12200.
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O mercado siderúrgico como um todo sofre constantes modificações em função de novos entrantes, oscilação do mercado e sob um contexto extremamente competitivo, produtores da indústria do aço seguem um caminho árduo na busca incessante por custos competitivos globalmente. Esta busca incessante pela redução de custos provoca a revisão de padrões e conceitos sobre o negócio, fazendo com que surjam idéias e novas formas de se fazer o que já é feito da mesma forma há muito tempo. Esta dissertação apresenta a aplicação de uma metodologia baseada em conceitos de manutenção aplicado a uma Oficina de Cilindros em uma Laminação de aços longos. Sob uma atuação de montagem, desmontagem, calibração e ajustes operacionais, uma Oficina de Cilindros apresenta muita interação com a recuperação e substituição de itens, com forte interação baseada em inspeções operacionais. O modelo proposto aborda estas inspeções, deixando claros a freqüência, parâmetros e seqüenciamento da atividade, além de empregar a manutenção preventiva nos conjuntos específicos, tudo com base em dados históricos, obtidos com snapshot, analisando o comportamento das falhas e quebras, permitindo decidir o tipo de intervenção, dividida em tecnologia, metodologia, periodicidade ou freqüência, sendo essas duas últimas obtidas com o conceito de delay time analysis.
Möller, Björn. "Full frame 3D snapshot : Possibilities and limitations of 3D image acquisition without scanning". Thesis, Linköping University, Department of Electrical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2857.
Pełny tekst źródłaAn investigation was initiated, targeting snapshot 3D image sensors, with the objective to match the speed and resolution of a scanning sheet-of-light system, without using a scanning motion. The goal was a system capable of acquiring 25 snapshot images per second from a quadratic scene with a side from 50 mm to 1000 mm, sampled in 512×512 height measurement points, and with a depth resolution of 1 µm and beyond.
A wide search of information about existing 3D measurement techniques resulted in a list of possible schemes, each presented with its advantages and disadvantages. No single scheme proved successful in meeting all the requirements. Pulse modulated time-of-flight is the only scheme capable of depth imaging by using only one exposure. However, a resolution of 1 µm corresponds to a pulse edge detection accuracy of 6.67 fs when visible light or other electromagnetic waves are used. Sequentially coded light projections require a logarithmic number of exposures. By projecting several patterns at the same time, using for instance light of different colours, the required number of exposures is reduced even further. The patterns are, however, not as well focused as a laser sheet-of-light can be.
Using powerful architectural concepts such as matrix array picture processing (MAPP) and near-sensor image processing (NSIP) a sensor proposal was presented, designed to give as much support as possible to a large number of 3D imaging schemes. It allows for delayed decisions about details in the future implementation.
It is necessary to relax at leastone of the demands for this project in order to realise a working 3D imaging scheme using concurrent technology. One of the candidates for relaxation is the most obvious demand of snapshot behaviour. Furthermore, there are a number of decisions to make before designing an actual system using the recommendations presented in this thesis. The ongoing development of electronics, optics, and imaging schemes might be able to meet the 3D snapshot demands in a near future. The details of light sensing electronics must be carefully evaluated and the optical components such as lenses, projectors, and fibres should be studied in detail.