Relational Structures for the Analysis of Decision Information in an Electronic Market

2003 ◽  
pp. 196-217
Author(s):  
Bartel van der Walle
Keyword(s):  
Electronic Market ◽  
Relational Structures

Binary Relational Structures Having Only Countably Many Nonisomorphic Substructures

1991 ◽  
Vol 56 (3) ◽  
pp. 876-884
Author(s):  
Dugald MacPherson ◽  
James H. Schmerl
Keyword(s):  
Relational Structures

Item Relational Structure Theory Based on Liu’s Improved Nonparametric IRT Theory

2013 ◽  
Vol 479-480 ◽  
pp. 1193-1196
Author(s):  
Hsiang Chuan Liu ◽  
Yen Kuei Yu ◽  
Hsien Chang Tsai
Keyword(s):  
Item Response Theory ◽  
Item Response ◽  
Joint Probability ◽  
Relational Structure ◽  
Structure Theory ◽  
Response Theory ◽  
Nonparametric Item Response Theory ◽  
Relational Structures ◽  
Relational Structure Theory ◽  
Nonparametric Item Response

In this paper, an extensional item relational structure theory based on the improved nonparametric item response theory is proposed. Item relational structure theory (Takeya, 1991) was developed to detect item relational structures of a group of subjects. The differences of these structures and experts knowledge structures can provide more information for planning remedial instruction, developing instruction materials, or educational researches. In this study, Lius improved nonparametric item response theory ( Liu, 2000, 2013) without the local independence assumption is used to estimate the joint probability of two items, and construct personal item relational structures. A Mathematics example is also provided in this paper to illustrate the advantages of the proposed method

scholarly journals Algebras Describing Pseudocomplemented, Relatively Pseudocomplemented and Sectionally Pseudocomplemented Posets

Symmetry ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 753
Author(s):  
Ivan Chajda ◽  
Helmut Länger
Keyword(s):  
Universal Algebra ◽  
Relational Structures ◽  
Pseudocomplemented Poset ◽  
The Given ◽  
The Relationship ◽  
Congruence Properties

In order to be able to use methods of universal algebra for investigating posets, we assigned to every pseudocomplemented poset, to every relatively pseudocomplemented poset and to every sectionally pseudocomplemented poset, a certain algebra (based on a commutative directoid or on a λ-lattice) which satisfies certain identities and implications. We show that the assigned algebras fully characterize the given corresponding posets. A certain kind of symmetry can be seen in the relationship between the classes of mentioned posets and the classes of directoids and λ-lattices representing these relational structures. As we show in the paper, this relationship is fully symmetric. Our results show that the assigned algebras satisfy strong congruence properties which can be transferred back to the posets. We also mention applications of such posets in certain non-classical logics.

Weakly atomic-compact relational structures

1971 ◽  
Vol 36 (1) ◽  
pp. 129-140 ◽  
Author(s):  
G. Fuhrken ◽  
W. Taylor
Keyword(s):  
Abelian Group ◽  
Model Theory ◽  
Compact Abelian Group ◽  
Finite Subset ◽  
Relational Structure ◽  
Similarity Type ◽  
First Order ◽  
Relational Structures ◽  
Order Language ◽  
Weakly Atomic

A relational structure is called weakly atomic-compact if and only if every set Σ of atomic formulas (taken from the first-order language of the similarity type of augmented by a possibly uncountable set of additional variables as “unknowns”) is satisfiable in whenever every finite subset of Σ is so satisfiable. This notion (as well as some related ones which will be mentioned in §4) was introduced by J. Mycielski as a generalization to model theory of I. Kaplansky's notion of an algebraically compact Abelian group (cf. [5], [7], [1], [8]).

Suppliers’ Participation in a Single Buyer Electronic Market

2008 ◽  
Vol 18 (5) ◽  
pp. 449-465 ◽  
Author(s):  
Sang M. Lee ◽  
Seong-Bae Lim ◽  
Domingo Ribeiro Soriano
Keyword(s):  
Electronic Market

scholarly journals Relational Structures of Fundamental Theories

2021 ◽  
Vol 51 (1) ◽  
Author(s):  
Pierre Martin-Dussaud
Keyword(s):  
Relational Structures

Modern information and communication technologies for successful business

2021 ◽  
Author(s):  
Yuliya Romanova ◽  
Pavel Muzychkin ◽  
Nataliya Zhenova ◽  
Lyudmila D'yakonova ◽  
Galina Eydlina ◽  
...  
Keyword(s):  
Information And Communication Technologies ◽  
Communication Technologies ◽  
Cash Flows ◽  
Electronic Business ◽  
Electronic Market ◽  
Doing Business ◽  
Information And Communication ◽  
Successful Business ◽  
A Site ◽  
Accessible Form

The textbook contains a verified set of materials about the opportunities and technologies of doing business on the global Internet. Technologies and means of the electronic market, electronic cash flows and possibilities of their management are considered. Special attention is paid to the issues of site construction: tips and step-by-step instructions are given for the direct creation of a site, setting a task and implementing it to order, as well as numerous opportunities and tools for promoting a site on the web. The basics of the security of electronic business activity are presented. The material is presented in a clear and accessible form. For students and undergraduates of various profiles, studying in the fields of "Economics" and "Management", graduate students, as well as entrepreneurs who want to promote their business via the Internet.

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