A Minimal Totally Dual Integral Defining System for the b-Matching Polyhedron

1983 ◽  
Vol 4 (2) ◽  
pp. 212-220 ◽  
Author(s):  
William Cook
Keyword(s):  
Defining System ◽  
Totally Dual Integral

ARCHITECTURE OF PORTS AND ADAPTERS IN ITERATIVE DEVELOPMENT WITH LIMITATIONS ON TIME

2019 ◽  
Author(s):  
Olexandr Grebenuk ◽  
Volodymyr Pavlenko
Keyword(s):  
System Structure ◽  
Time Constraints ◽  
Iterative Development ◽  
Rest Service ◽  
Defining System ◽  
Rules And Principles ◽  
Concurrent Development ◽  
Iterative Software ◽  
The One ◽  
Mail Service

The application of ports and adapters architecture (other names bulbous, layered, hexagonal) in iterative software development is considered in accordance with the requirements that come in chronological order in the practical example. Each iteration is supported by the schema architecture, problems encountered and their solution. The expediency of using the considered architecture in the iterative development of software with time constraints is shown. The system of collecting data on the concentration of carbon dioxide of the environment and air temperature in real time from a distributed network of sensors with a predetermined geolocation for medical institutions was developed. Put sensor information (ID, commissioning date and end date) in the Google Sheets spreadsheet. The data from the sensors should be collected on the server by REST service. The process of PPP in a specific project with significant time constraints is investigated, applying the rules and principles laid down in the architecture of ports and adapters, using the basic metrics to evaluate the complexity of adding new functionality, testing, concurrent development, speed and ease of development; draw conclusions about the conditions when it is appropriate to apply the chosen software design approach, and the ability of such an approach to perceive software requirements changes. The architecture of ports and adapters is useful if the system has many external integrations (mail service, push messages, databases, reporting system, etc.). The one-way communication with adapters guarantees the integrity of the main algorithmic part of the program. A thorough knowledge of the domain allows you to immediately determine the domain layer. Building a system structure that optimally reflects the domain requires the most time, and it will be costly in the future to correct errors made during the process of defining system layers (interfaces and systems). Domain logic testing is fast due to Unit tests, other tests are easy to write due to the small connectivity between layers. This architecture is not a completely new approach, but it takes the best of OOP, SOLID, DDD and determines how to apply these principles in the best way.

Defining “System”: a Comprehensive Approach

2017 ◽  
Vol 27 (1) ◽  
pp. 170-186 ◽  
Author(s):  
Hillary Sillitto ◽  
Dov Dori ◽  
Regina M. Griego ◽  
Scott Jackson ◽  
Daniel Krob ◽  
...  
Keyword(s):  
Comprehensive Approach ◽  
System A ◽  
Defining System

scholarly journals Identity Management System Model in the Internet of Things

TEM Journal ◽  
2020 ◽  
pp. 1338-1347
Author(s):  
Belkacem Athamena ◽  
Zina Houhamdi
Keyword(s):  
Management System ◽  
Identity Management ◽  
User Requirements ◽  
Sequence Diagrams ◽  
Modelling Language ◽  
Unified Modelling Language ◽  
Defining System ◽  
Identity Management System ◽  
System Requirements ◽  
The Internet Of Things

This paper describes the identity management system (IdMS) by defining system and user requirements. Additionally, it introduces the IdMS concept that approaches the things identity management. Moreover, the paper deeply describes the IdMS features using unified modelling language (UML) diagrams such as class, system, and sequence diagrams to show the main system functionalities. Ultimately, the suggested system is evaluated by comparing it with the existing systems and discussing the fulfilment of user and system requirements.

The SoSM Revisited-A Critical Realist Perspective

2011 ◽  
pp. 122-135 ◽  
Author(s):  
Philip J. Dobson
Keyword(s):  
Critical Theory ◽  
Critical Realism ◽  
Critical Systems ◽  
Social Situations ◽  
Knowledge Based ◽  
Critical Realist ◽  
Defining System ◽  
Emancipatory Practice ◽  
Framework System ◽  
Realist Perspective

The chapter revisits the System of System Methodologies (SoSM) and suggests that use of the SoSM as a framework for defining methodological assumptions is difficult when the concerned methodologies have significantly different meanings for one axis of the framework—“system” complexity. It is suggested that the purpose of the underlying system can provide a more appropriate frame for defining system approaches—such purpose being defined as interaction or transformation (Mathiassen & Nielsen, 2000). The chapter also uses aspects of critical realism to provide insights into the SoSM and the critical theory underpinning the framework. The SoSM helped to highlight the neglect of coercive situations and ultimately helped prompt the development of critical systems theory which is focused on three basic commitments, critical awareness, methodological pluralism, and emancipation. Maru and Woodford (2001) recently argue that the focus on emancipation has been relegated due to a concentration on pluralism. This chapter suggests that this is a logical outcome of the epistemological focus of the underlying critical theory of Habermas. The Habermas focus on the epistemological or knowledge-based aspects of the development process must necessarily relegate the importance of ontological matters such as the conditions necessary for emancipatory practice. This chapter proposes that the philosophy of critical realism has insights to offer through its highlighting of the ontological issues in more detail and in arguing for a recognition of the deep structures and mechanisms involved in social situations.

scholarly journals Defining System Boundaries of an Institution Nitrogen Footprint

2017 ◽  
Vol 10 (2) ◽  
pp. 123-130
Author(s):  
Elizabeth de la Reguera ◽  
Elizabeth A. Castner ◽  
James N. Galloway ◽  
Allison M. Leach ◽  
Neil Leary ◽  
...  
Keyword(s):  
System Boundaries ◽  
Defining System

Reliability Software to Design New Generating Plants

2004 ◽  
Author(s):  
J. K. August ◽  
Krishna Vasudevan ◽  
W. H. Magninie
Keyword(s):  
Failure Modes ◽  
Operating Cost ◽  
Commercial Production ◽  
Equipment Failure ◽  
Plant Design ◽  
Economic Success ◽  
Maintenance Costs ◽  
Defining System ◽  
System Requirements ◽  
And Control

Engineers design plants with overall income and operating cost objectives in mind. Defining system requirements, component functions, and failure modes, they discern risks that drive design. Maintenance costs get considered as an afterthought. Misunderstanding significant equipment failure modes greatly changes profitability. Improving certainty of plant economic success requires reducing the risk of unknown failures. Unanticipated operating restrictions can hobble commercial production. Avoiding unanticipated problems sustains predictable costs and operations. Relational software can reduce economic operating risk during plant design to project and control operating risks and maintenance costs.

An algorithm for a lifted Massey triple product of a smooth projective plane curve

2020 ◽  
Vol 30 (08) ◽  
pp. 1651-1669
Author(s):  
Younggi Lee ◽  
Jeehoon Park ◽  
Junyeong Park ◽  
Jaehyun Yim
Keyword(s):  
Projective Plane ◽  
Homogeneous Polynomial ◽  
Plane Curve ◽  
Main Idea ◽  
Triple Product ◽  
Cup Product ◽  
Smooth Projective Plane ◽  
Defining System ◽  
Polynomial Formula ◽  
Massey Triple Product

We provide an explicit algorithm to compute a lifted Massey triple product relative to a defining system for a smooth projective plane curve [Formula: see text] defined by a homogeneous polynomial [Formula: see text] over a field. The main idea is to use the description (due to Carlson and Griffiths) of the cup product for [Formula: see text] in terms of the multiplications inside the Jacobian ring of [Formula: see text] and the Cech–deRham complex of [Formula: see text]. Our algorithm gives a criterion whether a lifted Massey triple product vanishes or not in [Formula: see text] under a particular nontrivial defining system of the Massey triple product and thus can be viewed as a generalization of the vanishing criterion of the cup product in [Formula: see text] of Carlson and Griffiths. Based on our algorithm, we provide explicit numerical examples by running the computer program.

Electoral Systems and System Reforms in Latin America

2020 ◽  
Author(s):  
Brian F. Crisp ◽  
Patrick Cunha Silva
Keyword(s):  
Latin America ◽  
Electoral Systems ◽  
Dimensional Space ◽  
Two Dimensional ◽  
Clear Pattern ◽  
Party Leaders ◽  
Electoral Incentives ◽  
District Magnitude ◽  
Defining System ◽  
The Individual

Electoral systems impose incentives for relationships between parties and relationships within parties. In interparty terms, weak systems encourage many parties to enter and voters to vote sincerely for their most preferred options. Strong systems discourage many parties from entering and encourage voters to think strategically about viability (the likelihood a preferred option will win seats). In intraparty terms, centralized systems empower party leaders and put an emphasis on the party’s shared reputation. Individualistic systems empower individual candidates and members of congress and put an emphasis on their personal reputations. The individual rules examined when defining system incentives include ballot type (can voters choose among copartisans), the level to which votes are pooled before seats are awarded, the number and level at which votes are cast, district magnitude (the number of seats to be decided in a district in a given election), and legal thresholds (predefined vote total barriers to being awarded seats). The electoral systems used to elect lower houses, upper houses (where they exist) and presidents in Latin America are located in a two-dimensional space based on these incentives. In interparty terms, weak systems outnumber strong ones in the region. In intraparty terms, there is a great deal of diversity with centralized systems slightly outnumbering individualistic ones. Instances of electoral reform are captured as changes in incentives or movements in this space. Reforms are frequent but no clear pattern emerges in terms of countries across the region converging toward imposing similar electoral incentives.

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