Use Of Modern Computer Technology Research Articles

ASTATIC STABILIZATION SYSTEM FOR MARINE VESSELS

Ponte Academic JournalSep 2017, Volume 73, Issue 9 ASTATIC STABILIZATION SYSTEM FOR MARINE VESSELSAuthor(s): Maria A. Smirnova ,Mikhail N. Smirnov, Tatyana E. Smirnova, Nikolay V. SmirnovJ. Ponte - Sep 2017 - Volume 73 - Issue 9 doi: 10.21506/j.ponte.2017.9.30 Abstract:Modern marine vessels perform a wide spectrum of various tasks - from realization of passenger traffic and freight transport to implementation of research works and salvage operations in the open sea. In view of rapid development in computer technologies digital systems of automatic control, solving a lot of formalized problems, are installed on the ships. In this connection, a great number of problems that deal with construction of automatic control systems, such as searching for the optimal trajectory, minimizing the transition time, the compensation of various types of external disturbances like wind or rough sea, arises. In this situation we need to choose the parameters of the controller, which will give the best possible result under the disturbances. In case of successful solution of this problem with the use of modern computer technologies obtained control system is easily integrated into on-board computer complex structure and provides the desired dynamics of the control processes. In the article, some problems associated with computer methods of modeling and synthesis of automatic control of marine vessel at given yaw are considered. The problem of choosing of parameters of PID-controller that provide desired dynamics of closed-loop system is the basis of proposed approach. The MATLAB-Simulink system is used as the basic tool of computer support. An example is given. Download full text:Check if you have access through your login credentials or your institution Username Password

Methodological Provision of Active Management of Economic Risk in Agrarian Business

1. Introduction An integral feature of business activities is economic risk. Risk management, besides following general regularities, possesses sectorial peculiarities. Thus, for agrarian business, specifics consists in direct influence of natural factor on its efficiency. Use of probabilistic approach to evaluation of risk situations is complicated by information deficit and lack of frequency of external and internal conditions in agriculture. Due to that, receipt and effective use of accessible and reliable information plays an important role in risk management. That's why one of the main directions of formation and development of the system of risk management in the sphere of agrarian business is development of the complex of scientific and methodological provisions of its informational and analytical component, which nowadays does not conform to conditions of modern business activities. That's why the main purpose of this research is to build an algorithm of active management of aggregate economic risk in agrarian business, aimed for reduction of probability of negative result of business risk situations by means of substantiated actions for timely adaptation to changing economic conditions, which determined its actuality. 2. Research methods The object of the research--agrarian business structures of Stavropol Krai. The topic of the research is economic risk and its management in the sphere of agrarian business. Theoretical and empirical foundation of the research includes works of Russian and foreign scientists. The sources of information include regulatory acts of the Ministry of Agriculture of Stavropol Krai, statistical and analytical materials of the Federal State Statistics Service, territorial body of the Federal State Statistics Service in Stavropol Krai, Internet resources, and personal observations of the authors. At various stages of the research, comparative, analytical, and statistical methods of risk analysis were used, as well as methods of economic & mathematical modeling on the basis of use of modern computer technologies. For approbation of the offered methodology, financial & economic documentation of agribusiness enterprises and rural municipal entities was used. 3. Research results Risk management can be characterized as totality of methods, means, and measures which allow--with certain probability--forecasting risk events and taking measures for exclusion or reduction of negative consequences of such events and for increase of probability of positive results of risk situations. It should be noted that risk, as inseparable element of economic process, and specifics of measures for influencing it led to risk management being viewed as a separate type of professional activities. The main tasks of businessmen who successfully manage risks are: determination of high risk spheres; evaluation of level of risk; analysis of acceptability of this level of risk for organization (entrepreneur); development--if necessary--measures for prevention or reduction of risk; when risk even has already taken place--taking measures for maximum possible compensation of damage. Specific methods and means which are used during decision making and their implementation under risk conditions substantially depend on specifics of business activities, adopted strategy for achievement of set goals, specific situation, etc. Only with acceptable correlation of feedback and possible losses, entrepreneur should make a decision as to implementation of a risky project. It should be noted that in each specific case, acceptability of the above correlation can be different and depends on many factors--goals and tasks of the project; policy, strategy, and tactics of entrepreneur in the sphere of risk and its property state (Ermasova N.B., 2009). This principle also supposes comparison of the value of possible reduction of losses as a result of the taken measures, aimed at reduction of the level of risk or at transfer of risk to another person, with additional expenses for implementation of these measures. …

Approximated Poncelet configurations

In this short note we present the approximate construction of closed Poncelet configurations using the simulation of a mathematical pendulum. Although the idea goes back to the work of Jacobi ([17]), only the use of modern computer technologies assures the success of the construction. We present also some remarks on using such problems in project based university courses and we present a Matlab program able to produce animated Poncelet configurations with given period. In the same spirit we construct Steiner configurations and we give a few teaching oriented remarks on the Poncelet grid theorem.

Design of Project Management Information System for Electricity Infrastructure

In order to solve the existing problems of power system infrastructure project management, through the summary of power engineering project management experience and lessons learned, and make use of modern computer technology, network technology, various kinds of information integration and processing, the paper constructs the infrastructure information management platform that can provides a wealth of necessary information for construction project decision makers. This paper designs a kind of electric power construction project management information system, design and presented the function module structure and its subsystems in this paper, and finally completes the system development. The function of this system meets the design requirements, to improve and standardize the project management of electric power engineering.

Some aspects of biomechanics of conditionally removable prostheses on implants

A preliminary systemic biochemical analysis of conditionally removable prostheses on implants was made on the basis of major mechanical dependences. This analysis can serve as a precondition for an in-depth analysis with use of modern computer technologies.

Design – aspects of preparation of experts of the program direction

The features of structure of the design focused course created for students of a program educational direction are shined in work. Use of modern computer technologies at creation of graphic making production of advertising character is considered. Examples of thematic student's works, executed in the virtual environment are resulted.

CLASSIFICATION OF MARINE GEOLOGICAL AND ECOLOGICAL SYSTEMS

General classification of marine geology-ecological systems, built on the basis of the analysis and review of geological and geotechnical differences subsystems of the global marine geology-ecological system of the World Ocean is presented. Each of the classification taxa may be represented by its own formula. This allows during marine geology-ecological studies, including zoning and differentiation of geology-ecological systems, effective use of modern computer technology, which is important when handling large volumes of geological and environmental information.

Modeling recreational systems using optimization techniques and information technologies

Due to intrinsic complexity and sophistication of decision problems in tourism and recreation, respective decision making processes can not be implemented without making use of modern computer technologies and operations research approaches. In this paper, we review research works on modeling recreational systems.

You’ve got mail! Using email technology to enhance intercultural communication learning

As organizations become increasingly globalized and workforces increasingly culturally diverse, the use of "global virtual teams" is becoming more and more common. To be prepared to work in such a team, students need to develop skills in both intercultural communication and the use of modern computer technologies. This paper reports on a project that involved intercultural communication students in the U.S.A. and New Zealand corresponding through email. The aim was to enhance their intercultural communication learning with an experience of actually crossing cultural borders and of handling a popular computer technology to communicate in a virtual environment. Results and implications of the study are discussed.

A method for the automatic hearing aid fitting employing speech in noise and fuzzy logic

Some limitations of the hearing aid fitting process are discussed. The classical procedures in this process are based on audiometric test results and/or the loudness scaling method employing artificial test signals. However, the fitting of hearing aids should be also performed on the basis of testing speech understanding in noise, because this is much closer to the real life conditions. A satisfying reliability of these tests may be achieved through the use of modern computer technology with an application of a properly calibrated sound system. A new strategy applicable to fitting prostheses was developed. It allows finding automatically characteristics of a hearing aid matching patients needs. The principles of the fitting method employing fuzzy reasoning, and some results of the experiments will be presented in the paper.

A new field‐tested electronic system for data gathering, recording, transfer and dissemination via the World Wide Web

SummaryCavalcanti, T. B., Rezende, A., Togawa, R., Rodrigues, P., Favilla, L. M. & Neshich, G.: A new field‐tested electronic system for data gathering, recording, transfer and dissemination via the World Wide Web. – Taxon 47: 381‐386. 1998. – ISSN 0040‐0262.One of the major challenges for taxonomists today is the organisation of collection data by making use of modern computer technology for data storage and retrieval. Recent developments enabling data accessing in the field are here discussed. A field‐tested electronic system for data gathering, recording, storage, transfer, formatted printout (e.g. for labelling) and, finally, dissemination by on‐line access, called ELCEN (Electronic CEN Herbarium), is described. It makes use of new, easily portable, hand‐held “personal data assistants” (PDAs) that connect easily with personal computers (PCs) and workstations, and results in global data availability via Internet's World Wide Web. Among the advantages of the new system are its ease of use, the elimination of most typing errors during data entry, and the reduction of the time lag between data input and data availability.

A versatile system for the rapid collection, handling and graphics analysis of multidimensional data

The aim of this work was to provide a versatile system for handling multiparameter data that may arise from a variety of experiments — nuclear, AMS, microprobe elemental analysis, 3D microtomography etc. Some of the most demanding requirements arise in the application of microprobes to quantitative elemental mapping and to microtomography. A system to handle data from such experiments had been under continuous development and use at MARC for the past 15 years. It has now been made adaptable to the needs of multiparameter (or single parameter) experiments in general. The original system has been rewritten, greatly expanded and made much more powerful and faster, by use of modern computer technology — a VME bus computer with a real time operating system and a RISC workstation running Unix and the X Window system. This provides the necessary (i) power, speed and versatility, (ii) expansion and updating capabilities (iii) standardisation and adaptability, (iv) coherent modular programming structures, (v) ability to interface to other programs and (vi) transparent operation with several levels, involving the use of menus, programmed function keys and powerful macro programming facilities.

Computer Applications in Expansion History: Foreign Trade of the Outer Provinces of the Netherlands Indies, 1900–1940

The computer is rapidly gaining ground in the history of European overseas expansion. Vast amounts of systematic data are being processed with the aid of a whole host of automatic routines and programming devices. Use of modern computer technology may allow expansion historians to tackle problems on a larger scale and to furnish arguments with a more solid empirical foundation than was possible in previous days. Yet the road towards computerization is one full of pitfalls. The variety of available software options is truly bewildering and the accumulated knowhow in the field is not easily accessible. On the level of the individual researcher, there is a constant trade-off between investments in new skills and the actual processing of data and reporting of results. There is no single optimal path leading to maximal sophistication with a minimum of effort.

Editor's Introduction

As part of the far reaching educational reform that is to be implemented in the Soviet Union during the years of the Twelfth Five-Year Plan (1986-1990), the introduction into secondary education of a course called "Basic Information Science and Computer Technology" stands out among the reform measures as one that is receiving special emphasis in the country's press as well as special attention in the school system. The overall goal of the educational reform is to tie schooling more closely to the needs of the national economy, to produce well-educated and effectively trained manpower to fuel a recovery of its sagging output. The teaching of computer literacy was written into the official state documents that initiated the reform; the April 1984 "Fundamental Directions of General Education and Vocational School Reform" cited the need to "… equip [all secondary school] pupils with the knowledge and skills necessary to make use of modern computer technology…" and envisioned the introduction of computers "… into the educational process on a broad scale, setting up special school and inter-school computer centers for this purpose."

Using acoustic emission (AE) to locate and identify defects in composite structures

Use of AE in both development and routine testing of composite structures has been increasing considerably in recent years. Monitoring of GRP (glassfibre reinforced plastic) manlift booms is now routine and written into ASTM codes (ASTM F.18-10-05) and the ‘Recommended practice for AE monitoring of GRP tanks/pressure vessels’, published by the Society of the Plastics Industry 1 is soon to be adopted by ASTM. Similar practices for pipework and other composite structures are currently being produced as a result of extensive field experience. This paper looks not at the now routine application of AE to large structures, but at advanced techniques which can be used to analyse AE from composites by making use of modern computer technology to carry out rapid data processing, location and analysis previously not possible.