Relevant bibliographies by topics / SRV

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  2. Dissertations / Theses
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  5. Conference papers
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Academic literature on the topic 'SRV'

Author: Grafiati
Published: 4 June 2021
Last updated: 19 February 2022

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Journal articles on the topic "SRV"

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Erikssen, Gunnar, Jamil Aboulhosn, Jeannette Lin, Knut Liestøl, Mette E. Estensen, Ola Gjesdal, Helge Skulstad, Gaute Døhlen, and Harald Lauritz Lindberg. "Survival in patients with univentricular hearts: the impact of right versus left ventricular morphology." Open Heart 5, no. 2 (October 2018): e000902. http://dx.doi.org/10.1136/openhrt-2018-000902.

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ObjectivePatients with univentricular hearts (UVH) have high mortality despite modern treatment, and better methods to identify patients at highest risk are needed. We wanted to improve risk stratification in patients with UVH by focusing on the prognostic significance of single right versus single left ventricular morphology (SRV vs SLV).MethodsAll 395 patients with UVH operated at our centre were prospectively included from 1972 to 2016 (195 SRV, 166 SLV, 34 mixed or indeterminate ventricular morphology). Diagnoses, UVH morphology, types of all operations and time and causes of death or heart transplantation (HTX) were recorded. The primary endpoint was death or HTX.ResultsAmong the 111 non-Fontan patients, 88 died (SRV 62 vs SLV 20; p<0.0001), 32 due to heart failure (SRV 23 vs SLV 5; p=0.0012). Twenty-five years of cumulative SRV versus SLV survival among the 284 Fontan patients (41 deaths/HTX) was 66.9% vs 87.9% (p=0.0027), partly explained by more deaths/HTX due to heart failure among patients with SRV (p=0.0006). Survival in patients with SRV with and without hypoplastic left heart syndrome (HLHS) was similar. SRV versus SLV was a strong predictor of death/HTX in multivariable proportional hazards analyses (RR 3.3, 95% CI 1.6 to 6.6).ConclusionSRV versus SLV is a strong short-term and long-term predictor of survival among patients with UVH, mainly explained by higher rates of death/HTX due to heart failure in the SRV group. Our findings apply to patients with SRV both with and without HLHS.
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van der Kuyl, Antoinette C. "Contemporary Distribution, Estimated Age, and Prehistoric Migrations of Old World Monkey Retroviruses." Epidemiologia 2, no. 1 (February 3, 2021): 46–67. http://dx.doi.org/10.3390/epidemiologia2010005.

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Old World monkeys (OWM), simians inhabiting Africa and Asia, are currently affected by at least four infectious retroviruses, namely, simian foamy virus (SFV), simian immunodeficiency virus (SIV), simian T-lymphotropic virus (STLV), and simian type D retrovirus (SRV). OWM also show chromosomal evidence of having been infected in the past with four more retroviral species, baboon endogenous virus (BaEV), Papio cynocephalus endogenous virus (PcEV), simian endogenous retrovirus (SERV), and Rhesus endogenous retrovirus-K (RhERV-K/SERV-K1). For some of the viruses, transmission to other primates still occurs, resulting, for instance, in the HIV pandemic. Retroviruses are intimately connected with their host as they are normally spread by close contact. In this review, an attempt to reconstruct the distribution and history of OWM retroviruses will be made. A literature overview of the species infected by any of the eight retroviruses as well as an age estimation of the pathogens will be given. In addition, primate genomes from databases have been re-analyzed for the presence of endogenous retrovirus integrations. Results suggest that some of the oldest retroviruses, SERV and PcEV, have travelled with their hosts to Asia during the Miocene, when a higher global temperature allowed simian expansions. In contrast, younger viruses, such as SIV and SRV, probably due to the lack of a primate continuum between the continents in later times, have been restricted to Africa and Asia, respectively.
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Switzer, William M., Vinod Bhullar, Vedapuri Shanmugam, Mian-er Cong, Bharat Parekh, Nicholas W. Lerche, JoAnn L. Yee, et al. "Frequent Simian Foamy Virus Infection in Persons Occupationally Exposed to Nonhuman Primates." Journal of Virology 78, no. 6 (March 15, 2004): 2780–89. http://dx.doi.org/10.1128/jvi.78.6.2780-2789.2004.

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ABSTRACT The recognition that AIDS originated as a zoonosis heightens public health concerns associated with human infection by simian retroviruses endemic in nonhuman primates (NHPs). These retroviruses include simian immunodeficiency virus (SIV), simian T-cell lymphotropic virus (STLV), simian type D retrovirus (SRV), and simian foamy virus (SFV). Although occasional infection with SIV, SRV, or SFV in persons occupationally exposed to NHPs has been reported, the characteristics and significance of these zoonotic infections are not fully defined. Surveillance for simian retroviruses at three research centers and two zoos identified no SIV, SRV, or STLV infection in 187 participants. However, 10 of 187 persons (5.3%) tested positive for SFV antibodies by Western blot (WB) analysis. Eight of the 10 were males, and 3 of the 10 worked at zoos. SFV integrase gene (int) and gag sequences were PCR amplified from the peripheral blood lymphocytes available from 9 of the 10 persons. Phylogenetic analysis showed SFV infection originating from chimpanzees (n = 8) and baboons (n = 1). SFV seropositivity for periods of 8 to 26 years (median, 22 years) was documented for six workers for whom archived serum samples were available, demonstrating long-standing SFV infection. All 10 persons reported general good health, and secondary transmission of SFV was not observed in three wives available for WB and PCR testing. Additional phylogenetic analysis of int and gag sequences provided the first direct evidence identifying the source chimpanzees of the SFV infection in two workers. This study documents more frequent infection with SFV than with other simian retroviruses in persons working with NHPs and provides important information on the natural history and species origin of these infections. Our data highlight the importance of studies to better define the public health implications of zoonotic SFV infections.
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Serra, Ilka Márcia R. de S., and Gilson S. da Silva. "Caracterização biológica e fisiológica de isolados de Sclerotium rolfsii obtidos de pimentão no Estado do Maranhão." Fitopatologia Brasileira 30, no. 1 (February 2005): 61–66. http://dx.doi.org/10.1590/s0100-41582005000100010.

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A murcha de esclerócio do pimentão (Capsicum annum), causada por Sclerotium rolfsii é uma das mais importantes doenças dessa solanácea, nas regiões tropicais. Um dos requisitos básicos para obtenção de sucesso no controle dessa doença é o conhecimento do patógeno, especialmente de fatores relacionados à fisiologia e biologia. O presente trabalho teve como objetivo caracterizar cinco isolados de S. rolfsii, obtidos de pimentão, quanto ao crescimento micelial, produção de escleródios em diferentes regimes de luminosidade e em seis substratos naturais e a compatibilidade vegetativa entre os isolados. O efeito do substrato variou com o isolado na produção de escleródios. Os isolados SR3 e SR5 apresentaram maior produção de escleródios nos substratos aveia-ágar (AA) e fubá-ágar (FA), SR1 em casca de arroz (CA), SR2 em AA e SR4 em FA. O substrato CA favoreceu a formação de escleródios na maioria dos isolados. Quanto à taxa de crescimento micelial os isolados apresentaram pouca variação, sendo SR1, SR2 e SR3 os que apresentaram maior crescimento. Os cincos isolados exibiram comportamento diferente quando submetidos a três regimes de luz (luz contínua, alternância luminosa e escuro contínuo), tendo o primeiro favorecido maior produção de escleródios em relação aos outros. O teste de compatibilidade vegetativa mostrou diversidade genética entre os cincos isolados, possibilitando a classificação em três grupos. Os isolados SR3 e SR5 foram incompatíveis com os demais e entre si. Houve compatibilidade vegetativa entre os isolados SR1, SR2 e SR4. De acordo com os aspectos culturais e fisiológicos estudados, os isolados de S. rolfsii SR3 e SR5 podem ser considerados "strains" diferentes, enquanto SR1, SR2 e SR4 podem ser considerados da mesma "strain".
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Yee, JoAnn L., Richard F. Grant, Koen K. A. Van Rompay, Jeffrey A. Roberts, LaRene Kuller, Jesse L. Cunningham, Joe H. Simmons, and James F. Papin. "In vitro and In vivo Susceptibility of Baboons (Papio sp.) to Infection with and Apparent Antibody Reactivity to Simian Betaretrovirus (SRV)." Comparative Medicine 70, no. 1 (February 1, 2020): 75–82. http://dx.doi.org/10.30802/aalas-cm-19-000014.

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Despite the lack of confirmed reports of an exogenous Simian betaretrovirus (SRV) isolated from baboons (Papio sp.), reports of simian endogenous gammaretrovirus (SERV) in baboons with complete genomes suggest that such viruses may be potentially infectious. In addition, serologic tests have repeatedly demonstrated antibody reactivity to SRV in baboons from multiple colonies. These findings complicate the management and use of such animals for research. To provide further insight into this situation, we performed in vitro and in vivo studies to determine if baboons are or can be infected with SRV. In our initial experiment, we were not able to isolate SRV from 6 seropositive or sero-indeterminate baboons by coculturing their peripheral blood mononuclear cells (PBMC) with macaque PBMC or permissive cell lines. In a subsequent experiment, we found that baboon PBMC infected in vitro with high dose SRV were permissive to virus replication. To test in vivo infectibil- ity, groups of naive baboons were infused intravenously with either (i) the same SRV tissue culture virus stocks used for the in vitro studies, (ii) SRV antibody positive and PCR positive macaque blood, (iii) SRV antibody positive or indeterminate, but PCR negative baboon blood, or (iv) SRV antibody and PCR negative baboon blood. Sustained SRV infection, as defined by reproducible PCR detection and/or antibody seroconversion, was confirmed in 2 of 3 baboons receiving tissue culture virus but not in any recipients of transfused blood from seropositive macaques or baboons. In conclusion, the data indicate that even though baboon cells can be infected experimentally with high doses of tissue culture grown SRV, baboons that are repeatedly SRV antibody positive and PCR negative are unlikely to be infected with exogenous SRV and thus are unlikely to transmit a virus that would threaten the SPF status of captive baboon colonies.
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Chen, Li-Jun, Zhi-Rong Tong, Qian Wang, Yu-Qi Zhang, and Jin-Long Liu. "Feasibility of Computational Fluid Dynamics for Evaluating the Intraventricular Hemodynamics in Single Right Ventricle Based on Echocardiographic Images." BioMed Research International 2018 (2018): 1–11. http://dx.doi.org/10.1155/2018/1042038.

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This study introduced a combined computational fluid dynamics (CFD) and echocardiography methodology to simulate blood flow in the single right ventricle (SRV) and normal ventricles to study the intraventricular flow. Derived from echocardiographic image loops, CFD-based three-dimensional (3D) flow models of normal subject’s left ventricle (LV) and right ventricle (RV) and SRV with and without heart failure at three characteristic diastolic statuses were reconstructed. The CFD derived morphological and functional measurements in normal ventricles and the SRV were validated with echocardiography. The vortex in the normal ventricles and the SRV were studied. The morphological and functional measurements derived from CFD modeling and echocardiography were comparable, and both methods demonstrated the larger volume and higher spherical index in the SRV, in particular the SRV with heart failure. All the vortices in the SRV were smaller than those in the normal control subject’s LV and RV, notably with heart failure. Unlike normal LV and RV, no vortex ring was observed in the SRV. Echocardiography-based CFD demonstrated the feasibility of quantifying ventricular morphology and function; in addition, CFD can detect the abnormal flow pattern (smaller or obliterated vortices) in the SRV when compared with normal ventricles.
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Takano, Jun-Ichiro, Arlene Leon, Miyoko Kato, Yuko Abe, and Koji Fujimoto. "Isolation and DNA characterization of a simian retrovirus 5 from a Japanese monkey (Macaca fuscata)." Journal of General Virology 94, no. 5 (May 1, 2013): 955–59. http://dx.doi.org/10.1099/vir.0.047621-0.

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An SRV-like virus was isolated from a colony-born Japanese monkey. To identify this SRV-like virus, we designed universal primers at regions that were conserved among the reported SRV sequences in the 5′-LTR and the short ORF and we obtained plasmid clones containing the complete gag, prt, pol and env genes. The full-length sequences of the isolate were determined from the plasmids and by direct sequencing. Sequence comparisons and phylogenetic analyses indicated that this SRV-like virus had a sequence identical to the reported 626 bp of SRV-5. In this study, we isolated SRV5/JPN/2005/V1 from a Japanese monkey and characterized the full-length SRV-5 sequence.
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Zhu, Jingting, Lingyan Yang, Qibo Zhang, Jia Meng, Zhi-Liang Lu, and Rong Rong. "Autophagy Induced by Simian Retrovirus Infection Controls Viral Replication and Apoptosis of Jurkat T Lymphocytes." Viruses 12, no. 4 (March 31, 2020): 381. http://dx.doi.org/10.3390/v12040381.

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Autophagy and apoptosis are two important evolutionarily conserved host defense mechanisms against viral invasion and pathogenesis. However, the association between the two pathways during the viral infection of T lymphocytes remains to be elucidated. Simian type D retrovirus (SRV) is an etiological agent of fatal simian acquired immunodeficiency syndrome (SAIDS), which can display disease features that are similar to acquired immunodeficiency syndrome in humans. In this study, we demonstrate that infection with SRV-8, a newly isolated subtype of SRV, triggered both autophagic and apoptotic pathways in Jurkat T lymphocytes. Following infection with SRV-8, the autophagic proteins LC3 and p62/SQSTM1 interacted with procaspase-8, which might be responsible for the activation of the caspase-8/-3 cascade and apoptosis in SRV-8-infected Jurkat cells. Our findings indicate that autophagic responses to SRV infection of T lymphocytes promote the apoptosis of T lymphocytes, which, in turn, might be a potential pathogenetic mechanism for the loss of T lymphocytes during SRV infection.
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Yoshikawa, Rokusuke, Munehiro Okamoto, Shoichi Sakaguchi, So Nakagawa, Tomoyuki Miura, Hirohisa Hirai, and Takayuki Miyazawa. "Simian Retrovirus 4 Induces Lethal Acute Thrombocytopenia in Japanese Macaques." Journal of Virology 89, no. 7 (January 21, 2015): 3965–75. http://dx.doi.org/10.1128/jvi.03611-14.

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ABSTRACTIn 2001-2002, six of seven Japanese macaques (Macaca fuscata) died after developing hemorrhagic syndrome at the Kyoto University Primate Research Institute (KUPRI). While the cause of death was unknown at the time, we detected simian retrovirus 4 (SRV-4) in samples obtained from a similar outbreak in 2008-2011, during which 42 of 43 Japanese macaques died after exhibiting hemorrhagic syndrome. In this study, we isolated SRV-4 strain PRI-172 from a Japanese macaque showing severe thrombocytopenia. When inoculated into four Japanese macaques, the isolate induced severe thrombocytopenia in all within 37 days. We then constructed an infectious molecular clone of strain PRI-172, termed pSR415, and inoculated the clone-derived virus into two Japanese macaques. These animals also developed severe thrombocytopenia in just 31 days after inoculation, and the virus was reisolated from blood, bone marrow, and stool. At necropsy, we observed bleeding from the gingivae and subcutaneous bleeding in all animals. SRV-4 infected a variety of tissues, especially in digestive organs, including colon and stomach, as determined by real-time reverse transcription-PCR (RT-PCR) and immunohistochemical staining. Furthermore, we identified the SRV-4 receptor as ASCT2, a neutral amino acid transporter. ASCT2 mRNA was expressed in a variety of tissues, and the distribution of SRV-4 proviruses in infected Japanese macaques correlated well with the expression levels of ASCT2 mRNA. From these results, we conclude that the causative agent of hemorrhagic syndrome in KUPRI Japanese macaques was SRV-4, and its receptor is ASCT2.IMPORTANCEDuring two separate outbreaks at the KUPRI, in 2001-2002 and 2008-2011, 96% of Japanese macaques (JM) that developed an unknown hemorrhagic syndrome died. Here, we isolated SRV-4 from a JM developing thrombocytopenia. The SRV-4 isolate and a molecularly cloned SRV-4 induced severe thrombocytopenia in virus-inoculated JMs within 37 days. At necropsy, we observed bleeding from gingivae and subcutaneous bleeding in all affected JMs and reisolated SRV-4 from blood, bone marrow, and stool. The distribution of SRV-4 proviruses in tissues correlated with the mRNA expression levels of ASCT2, which we identified as the SRV-4 receptor. From these results, we conclude that SRV-4 was the causative agent of hemorrhagic syndrome in JMs in KUPRI.
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Wilkinson, Roseanne C., Claire K. Murrell, Rebecca Guy, Gail Davis, Joanna M. Hall, David C. North, Nicola J. Rose, and Neil Almond. "Persistence and Dissemination of Simian Retrovirus Type 2 DNA in Relation to Viremia, Seroresponse, and Experimental Transmissibility in Macaca fascicularis." Journal of Virology 77, no. 20 (October 15, 2003): 10751–59. http://dx.doi.org/10.1128/jvi.77.20.10751-10759.2003.

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ABSTRACT Endemic simian retrovirus (SRV) infection can cause fatal simian AIDS in Macaca fascicularis, but many individuals survive with few clinical signs. To further clarify the parameters of SRV pathogenesis, we investigated the persistence of viral DNA forms in relation to active viremia, antibody response, and transmissibility of infection. In M. fascicularis from endemically SRV-2-infected colonies, viral DNA was present in both linear and unintegrated long terminal repeat circular forms in peripheral blood mononuclear cells of all viremic and many nonviremic animals. Long-term followup of three individuals with distinct infection patterns demonstrated persistence of linear and circular forms of viral DNA in peripheral blood mononuclear cells and tissues, irrespective of viremia or antibody status, but reactivation of latent infections was not observed. The role of viral DNA in transmission and early pathogenesis of SRV-2 was investigated by inoculation of SRV-2 DNA-positive blood into groups of naïve M. fascicularis from either a viremic or nonviremic donor and subsequent analysis of the virological and serological status of the recipients. Transmission of SRV and development of anti-SRV antibodies were only observed in recipients of blood from the viremic donor; transfer of SRV provirus and unintegrated circular DNA in blood from the nonviremic donor did not lead to infection of the recipients. These results indicate that a proportion of M. fascicularis are able to effectively control the replication and infectivity of SRV despite long-term persistence of viral DNA forms in infected lymphocytes.
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Dissertations / Theses on the topic "SRV"

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Hahn, Christoph. "Eine CarSharing-Zielgruppenanalyse der großen SrV-Vergleichsstädte." Master's thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-185088.

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Due to enormous growth rates during the last couple of years CarSharing has become an interesting field of research. This Master Thesis focuses on the analysis of CarSharing users. For this purpose more than 37.000 participants of the "Große SrV-Vergleichsstädte"-Survey were taken into account. After a short literature review and some general information about the statistical methods, the thesis tries to work out some major characteristics of the typical CarSharing user. It will be shown, that a high income and a young age are of central importance. Also when analysing other variables different user quotas are observed, but can mostly be explained with different age or income levels. At the end a binary logit model is sugested to differ between users and non users, by using the previous analysed observed characteristics as input.
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Yu, Dong. "Landfill Leachate Treatment Case Study, SRV Atervinning, Sweden." Thesis, KTH, Industriell ekologi, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-32772.

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SRV återvinning AB is a joint-stock waste company located in the south of Stockholm. Since the first operation, three landfills have been practiced successively. The landfill generates about 200,000 to 250,000 cubic meters of leachate per year. An on-site leachate treatment plant consists of sequencing batch reactor (SBR) and constructed wetland was build for Landfill III. The research was to find out: - the capacity and efficiency of the existing on-site leachate treatment plant; - to analyse the costs and environmental benefits of different alternatives; and - using the above results, to assess and suggest supplementary methods to treat total landfill leachate concerning the site-specific conditions. This thesis contains a literature review of leachate production and composition as well as leachate treatment technologies. The technologies are described, evaluated or compared. The contents of this thesis divided into 11 chapters. Various calculations and assumptions that have been developed for effective controlling and treating leachate from landfills. Chapter 1 is devoted to basic facts of the leachate problems at SRV återvinning AB. Chapter 2 presented the methodologies that have been set up for solutions and suggestions. Chapter 3 provides a general background of the generation and compositions of waste leachate. A general overview of leachate treatment methods and systems is presented in Chapter 4. Costs of different leachate treatment methods is also exhibited. Chapter 5 provides a detailed current situation review of SRV återvinning AB on landfilling site, leachate quality and quantity and the existing treatment plant. Chapter 6 showed the previous application experience from other treatment plant. The calculation and comparison procedure for the capacity and efficiency of the plant at the landfill is presented in Chapter 7. Different alternatives to solve the leachate problem concerning the site-specification are proposed in Chapter 8. Their applicability, effectiveness are analyzed. Chapter 9 provides detailed discussion of alternatives and calculation procedure. After the conclusion of the thesis, recommendations for the further work are presented. This thesis will provide SRV återvinning AB different alternatives to solve leachate problems. Finally, considering the site-specification, economic perspective and environmental benefits, applying reverse osmosis after SBR as final step; the combination of aerated lagoon, sand filter and soil infiltration are proposed. Furthermore, the control of leachate production is also taken into account. Eventually, recommendations for the further work were presented.
www.ima.kth.se
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Batista, Eduardo Augusto Caldas 1966. "Simulação e integração termica SRV em colunas de destilação extrativa." [s.n.], 1995. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254978.

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Orientador: Antonio Jose de A. Meirelles
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos
Made available in DSpace on 2018-07-20T05:40:39Z (GMT). No. of bitstreams: 1 Batista_EduardoAugustoCaldas_M.pdf: 3266195 bytes, checksum: b97f1816bcb0435a4c66e3b89938089d (MD5) Previous issue date: 1995
Resumo: Neste trabalho estudou-se a aplicação da integração térmica SRV ("Secondary Reflux and Vaporization") à destilação extrativa para misturas com solvente de baixa volatilidade, etanol/água/etileno glicol, e para misturas com solvente que se vaporiza, acetona/metanol/água. Esta integração térmica, que consiste principalmente da transferência de calor da seção de enriquecimento para a seção de esgotamento, pode fazer uso de um gradiente de temperatura natural existente entre as seções da coluna de destilação extrativa. Este gradiente pode ainda ser aumentado pela operação das seções da coluna a diferentes pressões. A simulação do processo foi conduzida utilizando-se o método de NAPHTALI & SANDHOLM (1971). Este método sofreu algumas modificações para adaptá-lo à destilação SRV", ao cálculo de equilíbrio de fases selecionado e para diferentes aspectos da simulação. Os resultados são apresentados em três etapas: efeito da integração térmica sobre os perfis de temperatura, vazão e concentração; efeito na pureza de produtos de topo e fundo e impactos em termos de economia de energia. Para o sistema etanol/água/etileno glicol foi verificado uma redução de 25% no consumo de energia e para o sistema acetona/metanol/água uma redução de 36%, quando comparadas colunas integradas termicamente a colunas de destilação extrativa convencionais.
Abstract: This work was developed to study the application of the thermal integration SRV (Secondary Reflux and Vaporization) in the extractive distillation of the mixture with solvent of low volatility, ethanol/water/ethyiene glycol and mixture with solvent of higher volatility acetone/methanol/water. This thermal integration; which consists mainly of heat transfer from the rectifying section to the stripping section, can use the natural gradient of temperature occurring between the sections of the extractive column. This gradient can be increased when the pressure of the rectifying section is higher than the pressure of the stripping section. The process of simulation was conducted utilizing the NAPHTALI & SANDHOLM method (1971). This method was modified to incorporate the thermal integration SRVf the selected model of phase equilibrium and to improve other aspects of simulation. The results are presented in three parts; effects of thermal integration on the temperature, flow and component flow profiles; effect on the parity of overhead and bottom products and possibility of reduction in the energy consumption. Reduction of 25% in the energy consumption for the ethanol/water/ethylene glycol mixture and reduction of 3 69i for the ace tone/me thanol /water were achieved when integrated columns were compared to conventional extractive columns.
Mestrado
Mestre em Engenharia de Alimentos
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Wittwer, Rico. "Neue Daten für die Mobilitätsforschung: Mobilität in Städten – SrV 2018." Rhombos-Verlag, 2017. https://slub.qucosa.de/id/qucosa%3A21299.

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Seit mehr als vierzig Jahren analysiert die Verkehrswissenschaft an der Technischen Universität Dresden durch regelmäßige Haushaltsbefragungen die Entwicklung des Einwohnerverkehrs in Städten und Gemeinden. Die Technische Universität Dresden bereitet den nunmehr elften Befragungsdurchgang der Zeitreihe im System repräsentativer Verkehrsbefragungen (SrV) vor, der im Jahr 2018 stattfinden wird. Der Beitrag fokussiert auf die aktuellen Herausforderungen bei der Datenerhebung und -bereitstellung und beschreibt überblicksartig die Datenlage zur Alltagsmobilität in Deutschland. Weiterhin wird beispielhaft aufgezeigt, inwieweit aktuelle Mobilitätsdaten einen Mehrwert für die strategische raumrelevante Planung und Mobilitätsforschung darstellen und welche Hauptnutzungsbereiche existieren. Der Beitrag verfolgt das Ziel, die elfte Erhebungswelle „Mobilität in Städten – SrV 2018“ aus verschiedenen Blickwinkeln vorzustellen. Neben organisatorischen Gesichtspunkten spielen dabei auch Fragekatalog, Stadtbeteiligung und räumliche Auflösung der Daten eine Rolle.
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Ouedraogo, Noufou Lambert Gilles. "Impact du management de la qualité sur l'apprentissage organisationnel et la gestion des connaissances." Strasbourg : Université Robert Schuman, 2008. http://urs-srv-eprints.u-strasbg.fr/300.

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Pitz-Bach, Stéphanie Vallens Jean-Luc. "Les risques liés à l'insolvabilité les stratégies offertes au chef d'entreprise /." Strasbourg : Université Robert Schuman, 2008. http://urs-srv-eprints.u-strasbg.fr/314.

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Chàvez, Carmona Héctor Storck Michel. "Les délégations de pouvoir dans les sociétés par actions." Strasbourg : Université Robert Schuman, 2008. http://urs-srv-eprints.u-strasbg.fr/313.

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Harz, Jonas. "Spezifikationen und Schätzung eines Verkehrsmittelwahlmodells anhand von SrV-Daten der Bundeshauptstadt Berlin." Thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-155503.

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Die vorliegende Studienarbeit beschäftigt sich mit der Fragestellung, inwiefern sich Revealed-Preference-Daten aus der deutschen Mobilitätsbefragung "Mobilität in Städten" SrV 2008 dazu eignen, um basierend auf denen im Datensatz enthaltenen Wegen Verkehrsmittelwahlmodelle zu schätzen. Dazu wurden Wegedaten aus der Befragung verwendet, und die Wahlalternativen mit Hilfe der Google Directions API rekonstruiert. Mit den rekonstruierten Variablen Reisezeit und Reisekosten sowie verschiedenen sozioökonomischen und externen Variablen aus SrV 2008 wurden verschiedene Wahlmodelle geschätzt. Durch schrittweises Hinzufügen der Variablen konnte das Modell immer weiter verbessert werden. Wie zu erwarten, erwiesen sich dabei die Reisezeit und die Reisekosten als hoch signifikant. Von den restlichen Variablen waren jedoch lediglich das Geschlecht der befragten Person sowie die Wettersituation zum Zeitpunkt der Wahlentscheidung signifikant. Für das finale Modell wurden Zeitkostensätze errechnet und mit verschiedenen europäischen Studien verglichen. Die errechneten Zeitkostensätze erwiesen sich dabei als plausibel. Die SrV-Daten eignen sich also für die Schätzung von Wahlmodellen
The following thesis analyzes, if revealed preference data from the German mobility survey "Mobilität in Städten" SrV 2008 is suited to estimate mode choice models. For that purpose, trip data from the survey was used and the different choice alternatives were reconstructed with the Google Directions API. Several mode choice models were estimated with the help of the reconstructed variables travel time and travel costs plus several socioeconomic and external variables from SrV 2008. The variables were added to the model step by step, thereby the quality of the model improved. As expected, travel time and travel costs were highly significant. However from the remaining variables only the gender of the person and the weather at the time of the trip were significant. For the final model, values of time were calculated and these were compared with values from different European studies. The calculated values of time proved to be feasible. Therefore, SrV data is suited to be used for mode choice models
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Chutsch, Bastian. "Klassifizierung junger Erwachsener anhand ihres Mobilitätsverhaltens – Eine empirische Analyse der großen SrV-Vergleichsstädte." Master's thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-178520.

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Die vorliegende Arbeit untersucht das Mobilitätsverhalten junger Erwachsener. Dies ist von besonderer Relevanz, da die heutige jüngere Generation die Mobilität der Zukunft prägen wird. Aus jenem Grund ist es von eminenter Bedeutung, dass diese Altersklasse intensiv und über einen längeren Zeitraum betrachtet wird, um Veränderungen in deren Verkehrsmittelwahlverhalten zu erkennen. Weiterhin beeinflussen neben den mobilitätsspezifischen Einflüssen auch soziodemografische Entwicklungen das genannte Verhalten, welche sowohl identifiziert, als auch bzgl. der Einflussstärke ausgewertet werden müssen. Ein Vergleich diverser Studien zeigt jedoch, dass die Altersklasse der jungen Erwachsenen eine noch relativ unerforschte Gruppe darstellt. Zudem besteht im Hinblick auf die Altersabgrenzung in der Literatur Uneinigkeit. Daraus ergibt sich die zentrale Frage dieser Arbeit, inwieweit sich die Gruppe der jungen Erwachsenen im Mobilitätsverhalten unterscheidet und ob es somit sinnvoll ist eine differenziertere Betrachtung vorzunehmen. Nach intensiver Recherche wurde hier die Altersspanne der jungen Erwachsenen wie folgt definiert: Personen zwischen 18 und 35 Jahren. Als Datengrundlage dieser empirischen Analyse wurden die großen SrV-Vergleichsstädte von 2013 herangezogen. Der Datensatz jener Stadtgruppe bezieht sich auf deutsche Großstädte mit mind. 100.000 Einwohnern. Mithilfe einer Clusteranalyse konnte zunächst eine Struktur im Datensatz aufgedeckt werden, wonach die 18-21-, 22-26- und 27-35-Jährigen homogene Cluster bilden. Diese Cluster wurden anschließend deskriptiv analysiert. Hierbei sind deutliche Unterschiede im Verkehrsmittelwahlverhalten festzustellen. Der MIV-Anteil steigt z. B. mit zunehmendem Alter an, wohingegen beim ÖPV ein entgegengesetztes Verhalten zu erkennen ist. Die Fahrradnutzung ist wiederum konstant und mit steigendem Alter werden mehr Wege zu Fuß zurückgelegt. Weiterhin werden die einzelnen Gruppen u. a. durch unterschiedliche Lebensumstände sowie neue Kommunikationstechnologie beeinflusst. Abschließend wurde eine Diskriminanzanalyse durchgeführt, um ein Modell zur Gruppentrennung der drei gebildeten Cluster zu entwickeln. Das resultierende Modell beinhaltet jeweils drei soziodemografische und mobilitätsspezifische Variablen und trennt die Gruppen sehr gut. Darüber hinaus wurden die Elemente eines Kontrolldatensatzes ähnlich optimal eingeordnet, wodurch die Anwendbarkeit dieses Modells bestätigt werden konnte. Die Analyse des Mobilitätsverhaltens der jungen Erwachsenen hat somit ergeben, dass es sich hierbei um eine heterogene Altersklasse handelt. Aus diesem Grund scheint es sinnvoll jene Zielgruppe bei zukünftigen Untersuchungen differenzierter zu betrachten und die ermittelten Cluster zu berücksichtigen.
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Meister, Romy. "Evaluation verschiedener Imputationsverfahren zur Aufbereitung großer Datenbestände am Beispiel der SrV-Studie von 2013." Master's thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-198852.

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Missing values are a serious problem in surveys. The literature suggests to replace these with realistic values using imputation methods. This master thesis examines four different imputation techniques concerning their ability for handling missing data. Therefore, mean imputation, conditional mean imputation, Expectation-Maximization algorithm and Markov-Chain-Monte-Carlo method are presented. In addition, the three first mentioned methods were simulated by using a large real data set. To analyse the quality of these techniques a metric variable of the original data set was chosen to generate some missing values considering different percentages of missingness and common missing data mechanism. After the replacement of the simulated missing values, several statistical parameters, like quantiles, arithmetic mean and variance of all completed data sets were calculated in order to compare them with the parameters from the original data set. The results, that have been established by empiric data analysis, show that the Expectation-Maximization algorithm estimates all considered statistical parameters of the complete data set far better than the other analysed imputation methods, although the assumption of a multivariate normal distribution could not be achieved. It is found, that the mean as well as the conditional mean imputation produce statistically significant estimator for the arithmetic mean under the supposition of missing completely at random, whereas other parameters as the variance do not show the estimated effects. Generally, the accuracy of all estimators from the three imputation methods decreases with increasing percentage of missingness. The results lead to the conclusion that the Expectation-Maximization algorithm should be preferred over the mean and the conditional mean imputation.
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Books on the topic "SRV"

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Vietnam. Luật đá̂t đai: Thông qua tại Quó̂c hội khóa IX kỳ hợp thứ ba 14/7/1993 = Law on Land : approved by the Legislature IX of the National Assembly of SRV, as its 3nd [sic] session on July 14, 1993. Ha Noi: Vietnam Trade Information Centre, 1993.

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Rāmanūjā. Sri : Sri Bhashya of Acharya Sri Ramanuja. Madras: Hindu Dorairaja Iyengar Memorial Charitable Trust "Pangajam", 1985.

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Gosvāmī, Rādhu. Sri Chaitanyadev and Sri Gadadhar. Delhi: Kalpaz Publications, 2010.

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Sri Chaitanyadev and Sri Gadadhar. Delhi: Kalpaz Publications, 2010.

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Gosvāmī, Rādhu. Sri Chaitanyadev and Sri Gadadhar. Delhi: Kalpaz Publications, 2010.

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Gosvāmī, Rādhu. Sri Chaitanyadev and Sri Gadadhar. Delhi: Kalpaz Publications, 2010.

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Cakravartin, Viśvanātha. Sri Sri Krsna bhavanamrita mahakavya. Srila Puri: Gaudiya Vaisnava Association, 1999.

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Debī, Mahāśvetā. The glory of Sri Sri Ganesh. Calcutta: Seagull Books, 2003.

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RAY, Nirmal Kumar. Sri Sri Ramakrishna lilar shesh adhyay. Calcutta: Dey's, 1988.

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Borkakoti, Sanjib Kr. Sri Sri Sankardeva: A total personality. Guwahati: Bani Mandir, 1995.

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Book chapters on the topic "SRV"

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Rigo, Jürgen, and Paul Feinle. "SRV Tribometer." In Encyclopedia of Lubricants and Lubrication, 1949–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-22647-2_497.

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Gardner, Murray B., Michael Endres, and Peter Barry. "The Simian Retroviruses SIV and SRV." In The Retroviridae, 133–276. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4899-1730-0_5.

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Malley, A., S. Shiigi, E. Benjamini, L. Werner, C. Y. Leung, H. S. Kwang, M. Axthelm, and L. M. Hallick. "Characterization of a Synthetic Envelope Peptide of SRV-1 and SRV-2 Virus That Specifically Binds Rhesus Anti-SRV-1 and Anti-SRV-2 Neutralizing Antibodies." In Immunobiology of Proteins and Peptides V, 169–73. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4757-2046-4_14.

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Gorostiaga, Felipe, and César Sánchez. "HLola: a Very Functional Tool for Extensible Stream Runtime Verification." In Tools and Algorithms for the Construction and Analysis of Systems, 349–56. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-72013-1_18.

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AbstractWe present , an extensible Stream Runtime Verification (SRV) tool, that borrows from the functional language Haskell (1) rich types for data in events and verdicts; and (2) functional features for parametrization, libraries, high-order specification transformations, etc.SRV is a formal dynamic analysis technique that generalizes Runtime Verification (RV) algorithms from temporal logics like LTL to stream monitoring, allowing the computation of verdicts richer than Booleans (quantitative values and beyond). The keystone of SRV is the clean separation between temporal dependencies and data computations. However, in spite of this theoretical separation previous engines include hardwired implementations of just a few datatypes, requiring complex changes in the tool chain to incorporate new data types. Additionally, when previous tools implement features like parametrization these are implemented in an ad-hoc way. In contrast, is implemented as a Haskell embedded DSL, borrowing datatypes and functional aspects from Haskell, resulting in an extensible engine (The tool is available open-source at http://github.com/imdea-software/hlola). We illustrate through several examples, including a UAV monitoring infrastructure with predictive characteristics that has been validated in online runtime verification in real mission planning.
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Jörg, Brigitte, Keith Jeffery, and Geert van Grootel. "Towards a Sharable Research Vocabulary (SRV) – A Model-Driven Approach –." In Metadata and Semantic Research, 256–68. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-24731-6_27.

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Pan, Lin-hua, Hai-bo Wang, Jia-yuan He, Zhao-hui Lu, Ye Zhang, and He Pei. "Mechanism Research on Fracture Propagation by Stimulated Reservoir Volume (SRV) in Shale Reservoirs." In Springer Series in Geomechanics and Geoengineering, 485–503. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2485-1_45.

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Arlart, I. P., and R. Ertel. "Möglichkeiten einer Verbesserung der Bildqualität durch Veränderungen des Signal-Rausch-Verhältnisses (SRV) und der Fensterbreite bei transvenöser DSA." In CAR ’87 Computer Assisted Radiology, 270–77. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-95530-3_43.

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Hunek, Martin, and Zdenek Pliva. "Detection of NAT64/DNS64 by SRV Records: Detection Using Global DNS Tree in the World Beyond Plain-Text DNS." In Computer Networks, 27–40. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-50719-0_3.

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Benjamini, Eli, Jose V. Torres, Linda L. Werner, and Arthur Malley. "Isolation and Characterization of the Neutralizable Epitope of Simian Retrovirus-1 (SRV-1) and of the Cell Receptor for the Virus." In Advances in Experimental Medicine and Biology, 71–77. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-6000-1_9.

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Kiernan, Matthew J. "SRI or Not SRI?" In Environmental Alpha, 125–44. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118266748.ch6.

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Conference papers on the topic "SRV"

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Shen, Zhijie, Sakire Arslan Ay, and Seon Ho Kim. "SRV-TaGS." In the 19th ACM international conference. New York, New York, USA: ACM Press, 2011. http://dx.doi.org/10.1145/2072298.2072444.

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Takahashi, Shiro, Keita Okuyama, Akinori Tamura, Yasuhiro Mabuchi, Teppei Kubota, and Kazuhiro Yoshikawa. "Development of BWR Steam Dryer Loading Evaluation Methods Through Scale Model Tests Under Actual Steam Conditions." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97564.

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It has been demonstrated that intense fluctuating pressures acted on the steam dryer in a boiling water reactor (BWR) at higher velocity flows than in normal operation through actual BWR plant tests [1] and scale model air tests [2]. The cause of the dryer loading was considered as flow-induced acoustic resonance at the stub pipes of safety relief valves (SRVs) in the main steam lines (MSLs). Acoustic resonance was considered to be generated by interaction between the sound field and an unstable shear layer across the closed side branches of the SRV stub pipes. We have started a research program on BWR dryers to develop their loading evaluation methods. Some air scale tests were conducted and those are useful for evaluation of occurrence of acoustic resonance in SRV stub pipes and characteristics of fluctuating pressure in MSLs. However, it is a possibility that differences in pressure conditions and fluid proprieties caused the dryer loading to be underestimated. In the present study, we conducted scale tests under actual steam conditions to evaluate the scale model test methods for BWR dryer loading estimation. The Hitachi Utility Steam Test Leading facility (HUSTLE) was used for the scale model steam tests of MSLs and a steam dryer. Steam which was at the same pressure and temperature conditions as an actual BWR was used in the tests. The test apparatus consisted of the steam dryer, steam dome and 4 MSLs with 20 SRV stub pipes. We demonstrated that acoustic resonance occurred in the SRV stub pipes and fluctuating pressure which propagated from the SRVs to the dryer caused fluctuating stress on the steam dryer at the SRV resonance frequency. The increasing of fluctuating pressure due to the double vortex mode which occurred at a Strouhal number (St) from 0.8 to 0.9 could be clearly seen in the scale model steam tests unlike in the air tests. It was possible that self excited acoustic resonance was affected by the low pressure conditions and different fluid proprieties for the scale model air tests. However, no significant influence from steam pressure was seen at more than 3MPa. Normalized fluctuating pressure was almost the same regardless of pressure. We verified that normalization by dynamic pressure in the main pipe was a reasonable approach for evaluation of fluctuating pressure in the SRV stub pipes. Increasing of fluctuating pressure due to the double vortex mode was clearly distinguished for SRV stub pipes but became smaller for MS pipes and had insignificant impact on the dryer loading.
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Takahashi, Shiro, Masaya Ohtsuka, Keita Okuyama, Takashi Ito, and Kazuhiro Yoshikawa. "Experimental Study of Acoustic and Flow-Induced Vibrations in BWR Main Steam Lines and Steam Dryers." In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61318.

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The boiling water reactor (BWR-3) in the Quad Cities (QC) Unit 2 Nuclear Power Plant experienced a significant increase in steam moisture under extended power up-rate (EPU) conditions. Inspection of the stem dryer showed it was likely that BWR steam dryer had been damaged by high cycle fatigue due to acoustic-induced vibration. The cause of the dryer failure was considered as flow-induced acoustic resonance at the stub pipes of safety relief valves (SRVs) in the main steam lines (MSLs). Acoustic resonance was considered to be generated by interaction between the sound field and an unstable shear layer across the closed side branches of the SRV stub pipes. We have started a research program on BWR dryers to develop their loading evaluation methods. Moreover, it has been necessary to evaluate the dryer integrity of BWR-5 plants which are the main type of BWR in Japan. In the present study, we used 1/10-scale BWR tests and analysis to investigate the flow-induced acoustic resonance in SRV stub pipes and propagation of fluctuating pressure from SRVs to the dryer through the MSLs. The test apparatus consisted of a steam dryer, a steam dome and 4 MSLs with 20 SRV stub pipes. Acoustic analysis was also applied to evaluate the propagation of fluctuating pressure from MSLs to the dryer. We demonstrated that acoustic resonance occurred in SRV stub pipes at higher velocity flows than in the normal operation and fluctuating pressure propagated from SRVs to the dryer. The amplitude of the fluctuating pressure due to several stub pipes was much larger than that in one stub pipe because of interaction between them. The fluctuating pressure generated in stub pipes was propagated to the dryer through the MSLs with decreasing amplitude. The amplitude of the fluctuating pressure observed at the top of stub pipes was reduced significantly in the MSLs and maintained fairly well in the steam dome. The flow-induced acoustic resonance did not occur for Strouhal number above 0.6 in the MSLs system of the BWR-5. Results of the tests were compared with those of acoustic analysis. The acoustic analysis could well predict the dryer loading.
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Yangang, Wang, Chen Nanshu, Li Qingxi, and Georg Eitelberg. "An Optimization of Swirl Recovery Vane for Fokker 29 Propeller Using Design of Experiment Method." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-57691.

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Compared with the single propeller, a propeller with Swirl Recovery Vanes (SRV) has great advantages in recovering the residual swirl, which leads to an improvement both in thrust and propulsion efficiency. Based on the preliminary design of the SRV for Fokker F29 propeller, Design of Experiment (DoE) method was employed to optimize and further improve the performance of SRV in the present study. Firstly, orthogonal experiment was adopted to identify the most significant factors for affecting thrust. Secondly, steepest ascent method was used to search for the optimum range of target factors by using climbing experiment and factorial experiment. Finally, center composite experiment was adopted to find the optimal solution. As a result, the thrust of the optimized SRV has increased significantly by 11.78% at the design point, which leads to a 0.66% increment of total efficiency of propeller and SRV propulsion system, and even more increment at low rotation speed (2.10%). Besides, compared with the original SRV, the optimized SRV geometry improves the flow characteristics at the tip region of the vane. The tip vortex and swirl kinetic energy have been weakened distinctly, and the thrust coefficient distribution along the spanwise tends to be more uniform.
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Nishino, Koji, Yoshitaka Tsutsumi, Kazuyoshi Yonekura, Nobuo Kojima, Yukio Watanabe, and Shin Kumagai. "Seismic Test Results of the Main Steam Safety Relief Valve for Japanese Boiling Water Reactor Nuclear Power Plants." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-65602.

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The functional requirements of Main Steam Safety Relief Valves (SRVs) provided in Boiling Water Reactor (BWR) nuclear power plants in Japan have been previously evaluated via seismic tests and so forth; however, since the response acceleration has increased in line with a recent reassessment of standard earthquake ground motions, it is necessary to evaluate seismic operability with respect to high acceleration. In addition, from the viewpoint of equipment fragility in seismic PRA also, it is necessary to determine the practical seismic operability limits. We used a resonant shaking table in the Central Research Institute of the Electric Power Industry (CRIEPI) [1], which is capable of seismic tests at acceleration levels that have been unachievable until now, and in seismic tests carried out on an SRV, we obtained results confirming that validated seismic operability was possible even at response accelerations as high as 20×9.8 m/s2. The seismic operability results obtained for this SRV will be applied to a fragility analysis of seismic PRA.
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Gaddipati, Manohar, Caner Karacaer, Chet Ozgen, Tuba Firincioglu, Garf Bowen, Ian Pallister, and Gareth Shaw. "Overcoming the Limitations of SRV Concept." In Unconventional Resources Technology Conference. Tulsa, OK, USA: American Association of Petroleum Geologists, 2020. http://dx.doi.org/10.15530/urtec-2020-3221.

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Takahashi, Shiro, Keita Okuyama, Akinori Tamura, Masaya Ohtsuka, Masaaki Tsubaki, Mabuchi Yasuhiro, Teppei Kubota, Yukio Ogawa, Fumio Inada, and Ryo Morita. "Fluctuating Pressure Generating in BWR Main Steam Lines Acoustic Excited by Safety Relief Valve Stub Pipes and Dead Legs." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29361.

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During operation, the BWR-3 steam dryer in the Quad Cities Unit 2 Nuclear Power Plant was damaged by high cycle fatigue. The dryer failure was attributed to flow-induced acoustic resonance at the stub pipes of safety relief valves (SRVs) in the main steam lines (MSLs). The acoustic resonance was considered to be generated by interaction between the sound field and an unstable shear layer across the closed side branches with SRV stub pipes. We HITACHI and CRIEPI have started a research program on BWR dryers to develop their loading evaluation methods. Moreover, it has become necessary to evaluate the dryer integrity of BWR-5 plants in particular which are the main type of BWR in Japan. In the present study, we used 1/10-scale BWR tests and analyses to investigate the flow-induced acoustic resonance and characteristics of fluctuating pressure in MSLs. The test apparatus consisted of a steam dryer, a steam dome and 4 MSLs with 20 SRV stub pipes. A finite element method (FEM) was applied for the calculation of three-dimensional wave equations in acoustic analysis. We demonstrated that remarkable fluctuating pressures occurred in high and low frequency regions. Intensity of three peaks observed in the spectrum of fluctuating pressure in MSLs was increased with St. High frequency fluctuating pressures were generated by the flow-induced acoustic resonance in the SRV stub pipes. Low frequency fluctuating pressures were excited by the acoustic resonance in the dead leg. Frequency of fluctuating pressure generating in the SRV stub pipe was changed with St. On the other hand, frequency of fluctuating pressure excited by dead leg was almost constant. Fluctuating pressure in low frequency range increased gradually with flow velocity and its intensity was roughly proportional to the square of flow velocity. The flow-induced acoustic resonance did not occur for St larger than 0.6 in the BWR MSLs for both low and high frequency ranges. Operating conditions of the BWR-5 from 100 to 115% were in the range of St larger than 0.6, so intense acoustic resonance would not occur in the BWR MSLs.
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Wei, Yuefeng, Zhiqiang Hu, Gang Chen, and Jianmin Yang. "Numerical and Model Test Investigation on the Motion Characteristic of FDPSO and the Sheltered Riser Vessel." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20542.

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FDPSO is a multifunction floating platform, capable of drilling, production, storage and offloading. Sheltered Riser Vessel (SRV) serves as an independent buoyant hull to provide riser tensions, which is situated in the moon pool of FDPSO. Due to the shielding effect of moon pool, the motion of SRV is very small, so as to meet the requirement of drilling. In order to validate the basic FDPSO and SRV concepts, a model test was conducted in the basin of Ocean Engineering in the State Key Lab of Ocean Engineering in Shanghai Jiao Tong University. The storm tests were carried out in wave extremes of West Africa and white noise wave environments. Potential theory was adopted to calculate the motion performance of FDPSO system. Frequency domain analysis of the motion response amplitude operator (RAO) and time domain analysis in the extreme sea condition are both conducted. The comparison between the numerical simulation and model test results shows that the results of RAO and statistical value of response time series in the extreme sea condition are coincident. It is indicate that the method is credible and the concepts of FDPSO and SRV are likely to be feasible in West Africa.
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Wang, H., X. Liao, H. Ye, X. Zhao, C. Liao, X. Chen, D. Li, and Y. Li. "The Performance Evaluation of Old Well after SRV in Ordos Basin Tight Oil Reservoir." In SPE Energy Resources Conference. SPE, 2014. http://dx.doi.org/10.2118/spe-169968-ms.

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Abstract The technology of Stimulated reservoir volume (SRV) has been the key technology for unconventional reservoir development, it can create fracture network in formation and increase the contact area between fracture surface and matrix, thus realizing the three-dimensional stimulation and enhancing single well productivity and ultimate recovery. In China, the Ordos Basin contains large areas of tight oil reservoir with the porosity of 2~12 % and permeability of 0.01~1 mD. The most used development mode is conventional fracturing and water flooding, which is different from the natural depletion mode in oversea, but the development effect is still unfavorable. The idea of SRV is proposed in nearly two years in Changqing Oilfield. SRV measures are implemented in some old wells in tight oil formation. It is a significant problem that should be solved urgently about how to evaluate the volume fracturing effect. Based on the real cases of old wells with SRV measures, the microseismic monitoring is used to analyze the scale of formation stimulation and the complexity of fracture network after volume fracturing; the numerical well test and production data analysis (PDA) are selected to explain the well test data, to analyze the dynamic data, and to compare the changes of formation parameters, fluid parameters and plane streamlines before and after volume fracturing; then the interpretation results of well test with the dynamic of oil and water wells are combined to evaluate the stimulation results of old wells after SRV. This paper has presented a set of screening criteria and an evaluation method of fracturing effect for old well with SRV in tight oil reservoir. It will be helpful to the selection of candidate well and volume fracturing operation in Ordos Basin tight oil reservoir. It should be noted that the evaluation method mentioned in the paper can be expanded to volume stimulation effect evaluation in other unconventional reservoirs, such as tight gas, shale gas and so on.
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Musacchio, Massimo, Malvina Silvestri, Claudia Spinetti, Stefano Corradini, Valerio Lombardo, Luca Merucci, Fabrizia Buongiorno, et al. "ASI-SRV optical sensor data processing modules." In 2008 Second Workshop on Use of Remote Sensing Techniques for Monitoring Volcanoes and Seismogenic Areas (USEReST). IEEE, 2008. http://dx.doi.org/10.1109/userest.2008.4740366.

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Reports on the topic "SRV"

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Allbery, R. DNS SRV Resource Records for AFS. RFC Editor, April 2010. http://dx.doi.org/10.17487/rfc5864.

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Daboo, C. Use of SRV Records for Locating Email Submission/Access Services. RFC Editor, March 2011. http://dx.doi.org/10.17487/rfc6186.

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Gulbrandsen, A., P. Vixie, and L. Esibov. A DNS RR for specifying the location of services (DNS SRV). RFC Editor, February 2000. http://dx.doi.org/10.17487/rfc2782.

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4

Gulbrandsen, A., and P. Vixie. A DNS RR for specifying the location of services (DNS SRV). RFC Editor, October 1996. http://dx.doi.org/10.17487/rfc2052.

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5

Zhao, W., H. Schulzrinne, E. Guttman, C. Bisdikian, and W. Jerome. Remote Service Discovery in the Service Location Protocol (SLP) via DNS SRV. RFC Editor, July 2004. http://dx.doi.org/10.17487/rfc3832.

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6

Finch, T., M. Miller, and P. Saint-Andre. Using DNS-Based Authentication of Named Entities (DANE) TLSA Records with SRV Records. RFC Editor, October 2015. http://dx.doi.org/10.17487/rfc7673.

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7

Everhart, C., W. Adamson, and J. Zhang. Using DNS SRV to Specify a Global File Namespace with NFS Version 4. RFC Editor, June 2012. http://dx.doi.org/10.17487/rfc6641.

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8

Daigle, L., and A. Newton. Domain-Based Application Service Location Using SRV RRs and the Dynamic Delegation Discovery Service (DDDS). RFC Editor, January 2005. http://dx.doi.org/10.17487/rfc3958.

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9

Loreto, S. Internet Assigned Numbers Authority (IANA) Registration of Instant Messaging and Presence DNS SRV RRs for the Session Initiation Protocol (SIP). RFC Editor, April 2009. http://dx.doi.org/10.17487/rfc5509.

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Jannik, G. T., and P. P. Trimor. Maxdose-SR and popdose-SR routine release atmospheric dose models used at SRS. Office of Scientific and Technical Information (OSTI), July 2017. http://dx.doi.org/10.2172/1373543.

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