Semi-structured data

N4 Efficient access to semi-structured data in the organization and on the Web ... 

Semi-automated approaches to NOESY assignment [85-87] use the chemical shifts and a model or preliminary structure to provide the user with the list of possible assignments for each cross peak. The user decides interactively about the assignment and/or temporary removal of individual NOESY cross peaks, possibly taking into account supplementary information such as line shapes or secondary structure data, and performs a structure calculation with the resulting (usually incomplete) input. In practice, several cycles of NOESY assignment and structure calculation are required to obtain a high-quality structure. 

Qualitative methodology uses small samples of subjects and the method of (usually) personal interviews, based on structured or more usually semi-structured questionnaires. The interviews are tape- or video-recorded and then transcribed and analyzed for patterns and categories in students thinking. Data treatment can also be done by commercial packages for qualitative analysis. This methodology provides the possibility for in-depth monitoring and study of students ideas and understandings about scientific concepts. One could think of written questionnaires as instant pictures, and of interviews as motion pictures. 

The use of LC-ARC or 96-well microtiter plates containing solid scintillant, in contrast, represents low-cost methodologies to improve the sensitivity of the semi-quantitative analysis of metabolites. The LC-ARC and 96-well microtiter plate approaches have similar LOD for 14C and 3H and both can be used in combination with MS to generate quantitative and structural data. Both approaches are particularly useful in cases where the sample is limited. The throughput of LC-ARC is higher than for the plate approach due to the need to dry and count the plates offline. However, the 96-well plate approach is nondestructive, such that drug-related components can be subsequently eluted from the plates for further analysis, if necessary. 

Semi-Empirical Structural Data for BBL Lowest Energy Conformers (bond lengths are in A... 

Semi-empirical NDDO methods have been used for the study of various heterocycles <1995JMT51>. A belief that highly accurate values are not essential for valid conclusions to be drawn and the time advantage of semi-empirical over ab initio methods were factors governing the choice of these procedures. In general, there is reasonable agreement between structures and energies computed and experimental or ab initio values. The semi-empirical structural data have been discussed and compared with previously determined structures (Table 1). 

What has been described earlier is the semi-structured survey method for the assessment of GE at the individual farmers level. The other method that can be used to assess GE is the comparative quantitative method, which is the comparison of amoimt of collections of two milestone dates. Genetic Integrity (GI) and GE were calculated as suggested by Hammer et al Quantifying the same using the names of varieties is the method suggested for the first time in this study. This was possible as the 1960 collections passport data has included local varietal names. 

XML as a data model is vastly different than the relational model. Relations are highly structured, where schema is an intrinsic component of the model and an integral component in storage. On the other hand, XML is regarded as a semi-structured model. Instances of XML need not conform to any schema, and must only conform to certain well-formed-ness properties, such as each start element having an end tag, attributes having locally distinct names, etc. Individual elements... 

All flat file databases are semi-structured, containing a list of entries, with each entry containing a list of data-fields (e.g an Id, an Accession number, key words, a sequence etc.). Figure 1.6 shows a sample of a database entry. Each of the data-fields consists of strings or tokens. The set of productions for each database must describe how to divide the database into entries and then further into fields and then into the strings or tokens within that data field. It is these tokens within each field which are inserted into an index. 

Attempts have been made to calculate the mentioned forces more quantitatively. W. Simon and coworkers195) have been successful in representing their, and other, data by semi-empirical model, so that a reasonable quantitative account of the various reported phenomena can be presented in terms of molecular structure data. To date, little work has been done to apply more rigorous, non-empirical methods of quantum chemistry to problems other than solvation67,157,261,269). 

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