Ensuring input data integrity in a high-volume environment

In this paper the authors proposed a database sampling framework that aims to minimize the time necessary to produce a sample database. They argue that the performance of current relational database sampling techniques that maintain the data integrity of the sample database is low and a faster strategy needs to be devised. The sampling method targets the production environment of a system under development that generally consists of large amounts of data computationally costly to analyze. The results have been improved due to the fact that the authors have selected the users that they had more information about them and they have made the data table denser. Therefore, by increasing the data and making the rating more comprehensive for all the users they can help to produce the more and better association rules. The obtained results were not that much suitable for Jester dataset but with their proposed methods the authors have tried to improve the quantity and quality of the rules. These results indicate that the effectiveness of the system greatly depends on the input data and the applied dataset. In addition, if the user rates more number of the items the system efficiency will be more increased.

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Fault tolerance techniques to assure data integrity in high-volume PACS image archives

10.1117/12.208799 ◽

1995 ◽

Author(s):

Yutao He ◽

Lu J. Huang ◽

Daniel J. Valentino ◽

W. Keith Wingate ◽

Algirdas Avizienis

Keyword(s):

Fault Tolerance ◽

Data Integrity ◽

High Volume ◽

Image Archives

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Implementasi Constraint CHECK Pada Basis Data Aplikasi LaundryPOS Dalam Aspek Kebenaran Data

Creative Information Technology Journal ◽

10.24076/citec.2020v7i2.259 ◽

2021 ◽

Vol 7 (2) ◽

pp. 133

Author(s):

Firstyani Imannisa Rahma ◽

Tinuk Agustin ◽

Ronaldus Morgan James ◽

Ema Utami

Keyword(s):

Information System ◽

Input Data ◽

Software Process ◽

Data Integrity ◽

Data Validation ◽

Data Input ◽

Process Data ◽

Data Basis ◽

Level Data

Komponen penting yang dibutuhkan dalam sistem informasi atau perangkat lunak adalah basis data. Basis data membantu perangkat lunak dalam mengolah data yang datang dari input yang masuk ke dalam sistem. Untuk menjaga integritas dan keamanan data, programmer wajib memberikan fitur validasi data pada input. Validasi data dapat dilakukan dengan membuat batasan di tingkat aplikasi maupun di tingkat basis data. Sangat penting melakukan validasi data tingkat basis data tidak hanya pada tingkat pemrograman saja. LaundryPOS adalah aplikasi karis berbasis mobile yang diperuntukkan untuk usaha laundry. Penelitian ini akan melakukan analisis keuntungan dari CHECK constraint di database pada aplikasi LaundryPOS dalam aspek kebenaran data. Pengujian dilakukan dengan menggunakan query dan kendala. Hasil dari pengujian ini membuktikan bahwa constraint CHECK mampu menjaga aspek kebenaran pada basis data aplikasi LaundryPOS dengan menyaring data input yang tidak sesuai dengan format yang ditentukan.Kata Kunci—CHECK constraint, integritas data, validasi data, aspek kebenaran data, MySQLAn importantcomponents in the information system or software is database. The database helps the software process data that comes from the input that enters the system. To maintain data integrity and security, programmers must provide data validation features on the input. Data validation can be done by creating constraints at the application level or at the database level. It is very important to do database level data validation not only at the programming level. LaundryPOS is a mobile-based cashier application intended for laundry businesses. This study will analyze the benefits of CHECK constraints in the database on the LaundryPOS in terms of data correctness. Tests carried out using the query and constraints. The results of this test demonstrate that CHECK constraint is able to maintain the Correctness Aspects of the LaundryPOS database by filtering input data that does not match the specified format.Keywords—CHECK constraints, data integrity, data validation, aspek kebenaran data, MySQL

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Morphology, Distribution and Identification of Micro-Constituents Along Grain Boundaries in Nickel-Base Alloys

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100071326 ◽

1973 ◽

Vol 31 ◽

pp. 176-177

Author(s):

D. E. Fornwalt ◽

A. R. Geary ◽

B. H. Kear

Keyword(s):

Electron Microscope ◽

Grain Boundaries ◽

Volume Fraction ◽

Rupture Life ◽

Stress Rupture ◽

High Volume ◽

Precipitate Morphology ◽

Stress Rupture Life ◽

Nickel Base ◽

Scanning Electron

A systematic study has been made of the effects of various heat treatments on the microstructures of several experimental high volume fraction γ’ precipitation hardened nickel-base alloys, after doping with ∼2 w/o Hf so as to improve the stress rupture life and ductility. The most significant microstructural chan§e brought about by prolonged aging at temperatures in the range 1600°-1900°F was the decoration of grain boundaries with precipitate particles.Precipitation along the grain boundaries was first detected by optical microscopy, but it was necessary to use the scanning electron microscope to reveal the details of the precipitate morphology. Figure 1(a) shows the grain boundary precipitates in relief, after partial dissolution of the surrounding γ + γ’ matrix.

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Transmission Electron Diffraction Analysis by Computer

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100067194 ◽

1970 ◽

Vol 28 ◽

pp. 40-41

Author(s):

R.A. Ploc ◽

G.H. Keech

Keyword(s):

Electron Diffraction ◽

Input Data ◽

Reciprocal Lattice ◽

Computer Programme ◽

Transmission Electron Diffraction ◽

Usual Procedure ◽

Transmission Electron ◽

Complex Shapes ◽

Computer Input ◽

Diffraction Effects

An unambiguous analysis of transmission electron diffraction effects requires two samplings of the reciprocal lattice (RL). However, extracting definitive information from the patterns is difficult even for a general orthorhombic case. The usual procedure has been to deduce the approximate variables controlling the formation of the patterns from qualitative observations. Our present purpose is to illustrate two applications of a computer programme written for the analysis of transmission, selected area diffraction (SAD) patterns; the studies of RL spot shapes and epitaxy.When a specimen contains fine structure the RL spots become complex shapes with extensions in one or more directions. If the number and directions of these extensions can be estimated from an SAD pattern the exact spot shape can be determined by a series of refinements of the computer input data.

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A Comparison of Tem and Apfim to the Interpretation of Modulated Microstructures

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010011742x ◽

1985 ◽

Vol 43 ◽

pp. 70-71

Author(s):

M.G. Burke ◽

M.K. Miller

Keyword(s):

Low Temperature ◽

Microstructural Characterization ◽

Superlattice Reflection ◽

High Volume ◽

Atom Probe ◽

Dark Field ◽

Miscibility Gap ◽

Second Phase ◽

Two Phase ◽

Probe Field

Interpretation of fine-scale microstructures containing high volume fractions of second phase is complex. In particular, microstructures developed through decomposition within low temperature miscibility gaps may be extremely fine. This paper compares the morphological interpretations of such complex microstructures by the high-resolution techniques of TEM and atom probe field-ion microscopy (APFIM).The Fe-25 at% Be alloy selected for this study was aged within the low temperature miscibility gap to form a <100> aligned two-phase microstructure. This triaxially modulated microstructure is composed of an Fe-rich ferrite phase and a B2-ordered Be-enriched phase. The microstructural characterization through conventional bright-field TEM is inadequate because of the many contributions to image contrast. The ordering reaction which accompanies spinodal decomposition in this alloy permits simplification of the image by the use of the centered dark field technique to image just one phase. A CDF image formed with a B2 superlattice reflection is shown in fig. 1. In this CDF micrograph, the the B2-ordered Be-enriched phase appears as bright regions in the darkly-imaging ferrite. By examining the specimen in a [001] orientation, the <100> nature of the modulations is evident.

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