Data structures and accessing in data-base systems, I: Evolution of information systems

1973 ◽  
Vol 12 (1) ◽  
pp. 30-44 ◽  
Author(s):  
M. E. Senko ◽  
E. B. Altman ◽  
M. M. Astrahan ◽  
P. L. Fehder
Keyword(s):  
Information Systems ◽  
Data Base ◽  
Data Structures

scholarly journals Application of the Variety-Generator Approach to Searches of Personal Names in Bibliographic Data Bases--Part 2. Optimization of Key-Sets, and Evaluation of Their Retrieval Efficiency

1974 ◽  
Vol 7 (3) ◽  
pp. 201
Author(s):  
Dirk W. Fokker ◽  
Michael F. Lynch
Keyword(s):  
Information Systems ◽  
Data Base ◽  
Variable Length ◽  
Data Bases ◽  
Personal Names ◽  
Fixed Length ◽  
Bibliographic Data ◽  
Retrieval Efficiency ◽  
Types Of Information ◽  
High Degree

<p class="p1">Keys consisting of variable-length chamcter strings from the front and rear of surnames, derived by analysis of author names in a particular data base, am used to provide approximate representations of author names. When combined in appropriate ratios, and used together with keys for each of the first two initials of personal names, they provide a high degree of discrimination in search.</p> <p class="p1">Methods for optimization of key-sets are described, and the performance of key-sets varying in size between <span class="s1">150 </span>and <span class="s1">300 </span>is determined at file sizes of up to <span class="s1">50,000 </span>name entries. The effects of varying the proportions of the queries present in the file are also examined. The results obtained with fixed-length keys are compared with those for variable-length keys, showing the latter to be greatly superior.</p> <p class="p1">Implications of the work for a variety of types of information systems are discussed.</p>

scholarly journals Photogrammetric methods of terrain and obstacle data collection and AMDB creation based on satellite and UAS imagery

2018 ◽  
Vol 236 ◽  
pp. 01008
Author(s):  
Liudmila Mitsevich ◽  
Natalia Zhukovskaya
Keyword(s):  
Information Systems ◽  
Geographic Information Systems ◽  
Data Collection ◽  
Data Base ◽  
Spatial Data ◽  
Data Gathering ◽  
Efficient Technology ◽  
Aerial Photos ◽  
Attribute Data ◽  
Measurement Selection

The paper discusses the photogrammetric methods and process of creating geodata for aeronautical information databases. Efficient technology for collecting data on terrain, obstacles and cartographic information using satellite and aerial photos is given. The measurement, selection and evaluation of spatial data have met the international requirements for the completeness and accuracy as well as the developed structure of the attribute data base. The advantages of digital photogrammetric system and geographic information systems as the main software for aeronautical data gathering, are considered.

scholarly journals PERANCANGAN RENCANA STRATEGIS TEKNOLOGI INFORMASI DI PUSAT TEKNOLOGI INFORMASI DAN PANGKALAN DATA UIN SUSKA RIAU

2018 ◽  
Vol 1 (2) ◽  
pp. 183-197
Author(s):  
Febrizal Alfarasy Syam
Keyword(s):  
Information Technology ◽  
Information Systems ◽  
Strategic Planning ◽  
Data Base ◽  
Business Environment ◽  
Academic Community ◽  
Environment Analysis ◽  
Computer Center ◽  
It Strategic Planning ◽  
Bandwidth Capacity

To support the vision of UIN Suska Riau, so established the Technical Implementation Unit field of computer and information systems UIN Suska Riau called Computer Center (PUSKOM). However, in 2013, Computer Center (PUSKOM) UIN Suska Riau renamed the Center of Information Technology and Database (PTIPD). Center for Information Technology and Data Base (PTIPD) UIN Suska Riau is a part that manages the use of information technology in environment UIN Suska Riau. PTIPD provide internet network with current bandwidth capacity of 200 Mbps. PTIPD also conduct training in information technology for students and faculty and to develop information systems and applications as needed academic community UIN Suska Riau. Development of information systems that are not systematically planned will lead the organization does not have the priority scale development projects / IT and impressed patchy. This way will impact on the productivity of the organization. Center for Information Technology and Database (PTIPD) requires strategic planning of IS / IT should be appropriate, because if the IS / IT is not appropriate either target or goal, then the IS / IT will not be a competitive advantage for the Center for Information Technology and Database (PTIPD ) UIN Suska Riau. Form of Strategic Planning Information System that discussed in this study is to use a methodology Ward and Peppard, with the input of the internal business environment analysis and environmental analysis of the internal IS / IT. The results of this analysis define the design strategy plan IS / IT for the Center for Information Technology and Data Base (PTIPD) UIN Suska Riau. Keywords : PTIPD, Strategic IS / IT, Strategic Planning SI / IT, Ward and Peppard

scholarly journals IMPROVEMENT OF RAILWAY TOPOGRAPHIC PLANS UPDATING TECHNOLOGIES

Transport ◽  
2006 ◽  
Vol 21 (2) ◽  
pp. 119-122 ◽  
Author(s):  
Jūratė Sužiedelytė-Visockienė
Keyword(s):  
Information Systems ◽  
Data Base ◽  
Aerial Photograph ◽  
Aerial Photographs ◽  
Topographic Map ◽  
Aerial Photo ◽  
Aerial Triangulation ◽  
Photogrammetric Method ◽  
The City

Peculiar technologies on the update of topographic map linear objects to scale 1:500–1:2000 are presented. Due to that resulted peculiarities make aerial photographs, carrying out digital aerial triangulation, renewing the topographical plan. The article deals with the submitted example of the topographic plan exhibiting the renovated railway in the city of Vilnius. The updating has been made on the aerial photograph on 1:4000 scale with the photogrammetric instrument PlaniComp P3. The objects possessing no identification in photogrammetry are measured by means of a geodetic method. The redacting varied objects in a database are drawn with AutoCadsoftware. On the basis of this work it is possible to state that for fast and exact updating of topographic plans a progressive photogrammetric method is recommended. It is advised the edition data base to be made by the same operator who made photogrammetric work. The objects are visible in an aerial photo, but no identifying photogrammetry should be applied locally. Digital, renewed data are necessary for drawing up geo information systems (GIS) of the railway, to be able to make fast decisions of urgent problems.

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