sql departures from the relational model
slide cơ sở dữ liệu tiếng anh chương (3) the relational model Transparencies
... Objectives x x x x x x x Terminology of relational model How tables are used to represent data Connection between mathematical relations and relations in the relational model Properties of database relations ... Education Limited 1995, 2005 Relational Model Terminology x A relation is a table with columns and rows – Only applies to logical structure of the database, not the phy sical structure x Attribute ... x Domain is the set of allowable values for one or more attributes © Pearson Education Limited 1995, 2005 Relational Model Terminology x Tuple is a row of a relation x Degree is the number of...
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slide cơ sở dữ liệu tiếng anh chương (16) methodology logical database design for the relational model transparencies
... Review logical data model with user To review the logical data model with the users to ensure that they consider the model to be a true representation of the data requirements of the enterprise © ... of the parent entity is placed in the relation representing the child entity If the relationship has one or more attributes, these attributes should follow the posting of the primary key to the ... attribute is itself an alternate key of the entity, the primary key of the new relation is the combination of the multi-valued attribute and the primary key of the entity © Pearson Education Limited...
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Tài liệu Báo cáo khoa học: Pyrimidine-specific ribonucleoside hydrolase from the archaeon Sulfolobus solfataricus – biochemical characterization and homology modeling doc
... on the van der Waals surface of the protein model The analysis of cavities in the proteins was made using the program avp [69], using a probe of 0.5 A to assess the packing of the molecules The ... C-terminal region and that the C-terminal peptide of SsCU-NH is necessary for the integrity of the active site These results conrm the conclusions drawn from the analysis of the sequence alignment ... present in the templates, supporting the correctness of the nal alignment that was used to create the structure of the monomeric SsCU-NH (data not shown) Among the ten models obtained using the two...
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Tài liệu Báo cáo khoa học: Molecular modeling and functional characterization of the monomeric primase–polymerase domain from the Sulfolobus solfataricus plasmid pIT3 doc
... and D166 and the adjacent H138 are present in the active site Moreover, the construction of a reasonable model for the Rep245 prim–pol domain (as we designate it from now on) from the pRN1 prim–pol ... and the b9 strand to the b10 strand at the bottom of the Zn-stem loop in the pRN1 prim–pol structure However, because the Zn-stem loop is a fairly self-standing structure protruding from the ... interface between the DNA binding and the active site subdomains, we managed to model the entire domain without it Another significant finding concerns the nature of the acid residues within the active...
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Tài liệu A faulty model? What the Green Climate Fund can learn from the Climate Investment Funds doc
... protect the rights of the most vulnerable.”25 Sharma further highlights the difficulty the CIFs model has in offering genuinely legitimate representatives from the constituencies of the most ... by the Bretton Woods Project and other groups has shown, there are numerous issues and concerns around the operations of the CIFs These include, but are not limited to: the accountability of the ... reaching the most vulnerable, and used to analyse the institutional arrangements, operational modalities, and performance of the CIFs A faulty model? Background – The CIFs as a model for the GCF? The...
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COMBINING EVIDENCE ON AIR POLLUTION AND DAILY MORTALITY FROM THE 20 LARGEST US CITIES: A HIERARCHICAL MODELLING STRATEGY potx
... referred to as the `base-line' and the `spatial' models In both models, we assumed that the vector of the estimated regression coecients obtained from the ®rst-stage analysis, conditional on the vector ... regression models with and without modelling of the possible spatial autocorrelation among the c s which we refer to as the base-line and spatial models respectively 4.1 Modelling approach The modelling ... between the posterior inferences under the two models and assesses the sensitivity of the results to the choice of lag structure and prior distributions Description of the databases The analysis...
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Modeling the Departure of Military Pilots from the Services ppt
... delays the career track of newer pilots 4 modeling their decisions, and estimating the model to identify crucial factors in their decisionmaking In the following chapters, we summarize the data ... of the development of the specific mathematical form of our pilot attrition model Dependent Variable The dependent variable is the indicator of whether an individual stays or leaves during the ... chapter, the dependent variable in the model is the indicator of the decision to stay or leave during the ADSO window Some of the independent variables included in the model are • military and civilian...
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Báo cáo khoa học: "A DOM Tree Alignment Model for Mining Parallel Data from the Web" doc
... performance on the web data, the similarity of the HTML tag structures between the parallel web documents should be leveraged properly in the sentence alignment model In order to improve the quality ... STSG in the context of language generation, while we search for the best alignment on the condition that both trees are given To facilitate the presentation of the tree alignment model, the following ... to the corresponding DOM tree; N iD refers to the ith node of T D (here the index of the node is in the breadth-first order), and TiD refers to the sub-tree rooted at N iD , so N1D refers to the...
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Báo cáo Y học: Modeling the three-dimensional structure of H+-ATPase of Neurospora crassa Proposal for a proton pathway from the analysis of internal cavities pptx
... Likewise, the secondary structure of the phorphorylation domain deduced from the model built here using the Ca2+-ATPase as template and that determined directly from the amino acid sequence of the ... H+-ATPase The chemiosmotic model for PMA1_NEUCR In the P-type proton pumps, the origin of the transported proton as well as the proton entry pathway is still unknown The socalled Ôchemiosmotic model ... begin close to the phosphorylated aspartate (Asp378) The major steps of the model are as follows: The first step is a covalent phosphoryl-transfer reaction from the MgATP molecule to the strictly...
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Access Control Models: From the real-world to trusted computing potx
... Security Models We want models that represent a range of sensitivities and that separate subjects from the objects they should not have access to The military has developed various models for ... authority – E.g the operating system enforces the control by checking information associated with both the subject and the object to determine whether the subject should access the object MAC ... Take-Grant Models, pg Since the graph only includes arcs corresponding to non-empty entries in the access control matrix, the model provides a compact representation Question of Take-Grant Models:...
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The Relational Data Model and Relational Database Constraints
... by the theory of relations We review the essentials of the relational approach in this chapter Relational Model Concepts The model was first proposed by Dr E.F Codd of IBM in 1970 in the ... Model of Data is based on the concept of a Relation A Relation is a mathematical concept based on the ideas of sets The strength of the relational approach to data management comes from the ... Outline Relational Model Concepts Relational Model Constraints and Relational Database Schemas Update Operations and Dealing with Constraint Violations Relational Model Concepts The relational...
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Báo cáo sinh học: "An NIH intramural percubator as a model of academic-industry partnerships: from the beginning of life through the valley of death" pptx
... once the work ‘leaves the lab’ The proposed NIH percubator program pushes this concept one step further by eliminating the barrier altogether, but at the same time respecting and building upon the ... progresses through the early incubation phase it must then traverse the so-called valley of death - from promise to real delivery - from drug candidate to effective therapeutic - from prototype to ... support to go from start to finish, alone or in a later-stage, de-risked partnership with other companies - down into the valley of death, across the basin, and up the steep grade of the opposite...
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báo cáo hóa học:" An NIH intramural percubator as a model of academic-industry partnerships: from the beginning of life through the valley of death" ppt
... once the work ‘leaves the lab’ The proposed NIH percubator program pushes this concept one step further by eliminating the barrier altogether, but at the same time respecting and building upon the ... progresses through the early incubation phase it must then traverse the so-called valley of death - from promise to real delivery - from drug candidate to effective therapeutic - from prototype to ... support to go from start to finish, alone or in a later-stage, de-risked partnership with other companies - down into the valley of death, across the basin, and up the steep grade of the opposite...
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Báo cáo y học: "4th meeting of the EU research network EUROME: From the identification of genes and cellular networks in murine models of arthritis to novel therapeutic intervention strategies in rheumatoid arthritis, London, UK, 9 March 2004" pot
... The results indicated that there is redundancy in pathogenic TNF sources (bone marrow cells in the TNF∆ARE model or stromal-radioresistant cells in the Tg197 hTNF+/– model) that suffice for the ... identify the genes controlling this disease the group has made crosses between susceptible and resistant rat strains Several loci that control the onset of arthritis, the severity and chronicity of the ... all cases examined, the indispensable receptor for the arthritic process is TNF-R1 in recipient mice The research within EUROME also focuses on the identification of possible therapeutic targets...
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Báo cáo y học: "dentification of blood biomarkers of rheumatoid arthritis by transcript profiling of peripheral blood mononuclear cells from the rat collagen-induced arthritis model" doc
... P(i) be the ith sorted P value and i its rank Then, the FDR for each sorted P value was calculated by timing the P value with m/i, and monotonizing all of the FDRs from the largest to the smallest: ... murine autoimmune arthritis models [11,13-15] in order to appreciate better the gene expression in PBMCs in the rat CIA model We retrieved the reported DEGs from these published studies Comparisons ... members of the functional genomics group for helpful discussion, and the members of the Shou laboratory for critical reading of the manuscript We also acknowledge the support from the bioinformatics/IT...
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Báo cáo sinh học: "Inference for threshold models with variance components from the generalized linear mixed model perspective" ppt
... included, neither in the generation of the data nor in the model fitted The negative value for this configuration indicates that, although the bias seems fairly independent of the size of the fixed ... for the values of the variance components obtained for the corresponding full model, ie model 1-5 Variability due to estimation of the variance components is ignored For each line in the table the ... effects below the line Referring to a chi-square distribution, in model seasonal effects seem to be unimportant and are excluded from the subsequently fitted models In model for the M-set, the following...
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Báo cáo y học: " A predictive model for respiratory syncytial virus (RSV) hospitalisation of premature infants born at 33–35 weeks of gestational age, based on data from the Spanish FLIP study" pdf
... which the model could be fully externally validated Therefore, to gain a measure of the applicability of the model to other European populations, the model was tested against data from the Munich ... accuracy tested The results from this analysis were then compared to the results for the model Results Development of the predictive model The 15 variables in the FLIP study are compared in the hospitalised ... excluded from the analysis The predictive function derived from the FLIP dataset was tested in two ways against data from the Munich RSV study Firstly, the predictive variables identified from the FLIP...
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Báo cáo y học: " Is neutrophil elastase the missing link between emphysema and fibrosis? Evidence from two mouse models" pps
... patients with IIP [7] These data all together suggest a common pathway in the development of these two pathologies According to a current view, pulmonary emphysema originates from an imbalance between ... damage in this condition This hypothesis is based on a mixture of evidence from animal models, broncho-alveolar lavage fluid (BALF) data, in vitro experiments, and from the high incidence of emphysema ... Thus, these studies suggest a significant role for the antiprotease screen not only in the development of pulmonary emphysema but also in the modulation of fibrotic lesions This is further supported...
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Báo cáo y học: "Distinct roles of CD4+ T cell subpopulations in retroviral immunity: lessons from the Friend virus mouse model" pptx
... study the early immunological responses to HIV infection Another limitation in HIV research is the lack of a tractable small animal model susceptible to HIV infection The most widely used model ... fortifying the immunological control of FV [57-59] On the other hand, CD4+ Tregs down-regulate the immune responses of CD4+ Th cells [32,58] and CD8+ CTLs [39,60-62] thus, prolonging the recovery from ... is determined by the nature of the infectious agent and the inflammatory milieu formed by the pathogen [103-105] Although T cell help may be dispensable in the priming phase of the CD8 + T cell...
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Báo cáo y học: " Advantages of the single delay model for the assessment of insulin sensitivity from the intravenous glucose tolerance test" doc
... errors for the Insulin Sensitivity Indices from the Single Delay Model (KxgI) and from the Minimal Model (SI) For the KxgI the average values were computed both in the Full Sample and in the reduced ... reported the averages of each pair of Insulin Sensitivity Indices (one from the Single Delay Model KxgI and one from the Minimal Model SI) from the reduced Sub-Sample (obtained eliminating the 18 ... to be the case for the KxgI index as shown by the actual range of values, by the correlation with the 1/HOMA-IR and HOMA2 indices, by the correlation with the M index from the EHC, and by the very...
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