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2021 ◽  
Vol 7 (4) ◽  
pp. 54-62
Author(s):  
A. Kovalsky ◽  
G. Mitryaev ◽  
A. Pitrin

The article develops a methodology for scheduling an orbital channel resource with operational priority assignment based on the calculation of the parameters of a non-Markov service model with a limited residence time of a request in the system, which differs from known methods in that it takes into account the priority of various network subscribers, taking into account the high dynamics of their movement and the average waiting time in the service system with priority in the allocation of the orbital channel resource of the satellite command-relay system. The analysis of the influence of service quality indicators of information data flows is carried out.It is shown that the developed method of priority scheduling makes it possible to meet the requirements for the quality of service. A complex of experimental studies was carried out, which showed the possibility of ensuring the required level of stability with the deterioration in difficult conditions of radio electronic equipment, which made it possible to formulate practical proposals for improving the complex of coordination and distribution of resources of in the satellite command relay system.


2021 ◽  
Vol 7 (3) ◽  
pp. 38-46
Author(s):  
A. Kovalsky ◽  
G. Mitryaev ◽  
A. Pitrin

In work systems analysis of process of target functioning of the satellite command relay system (SCRS) in the conditions of a difficult radio-electronic situation is carried out. The carried-out analysis of perspectives of development of a subsystem of relaying of SKRS of orbital grouping of spacecrafts of remote sensing of Earth, allowed to draw a conclusion on features of a stage of coordination planning of the means of a subsystem of relaying consisting in distribution of SKRS the orbital channel resource (OCR) on the basis of the non-Markov priority systems of service. The model of operational distribution of ROC of a subsystem of relaying on the basis of the priority systems of service in which, unlike the known models, time of stay of the request in a system is limited is received, limits for a type of distribution of holding time of requests are lifted and also expression for calculation of the initial moments of distribution of waiting time of messages of different priorities is received. Use of model allows to evaluate the probability of untimely delivery of details and also to provide required figures of merit of service of priority flows and at the expense of it to provide the required connectivity and stability of SKRS in general.


Respect is one of the central concepts in contemporary moral thought. It plays a prominent role in everyday, pre-philosophical moral thinking, as well as in recent moral theory and applied ethics. Yet basic questions about the concept and role of respect have received less attention than might be expected. This volume takes up some of these basic questions. The book is not meant to be a comprehensive handbook that covers all aspects of the topic of respect, nor is the focus of the book mainly historical. Rather, the aim is to give leading experts in the field a chance to present their latest ideas and point the research on respect in new directions. Following an introductory historical essay, Part I addresses questions of what respect is, its nature and basis. Part II examines questions in moral theory, for example what exactly ought to be respected, what role respect plays in morality, and which different types of respect are appropriate and morally significant. Part III deals with the practical application of requirements of respect. The essays in this volume will be of interest both to scholars and students working on issues of respect and to anyone interested in this central moral notion.


2020 ◽  
Vol 143 (2) ◽  
Author(s):  
Ernest D. Eason ◽  
Raj Pathania ◽  
Anders Jenssen ◽  
Dennis P. Weakland

Abstract A multiyear international data collection, data review, modeling, and implementation project was recently completed, producing stress corrosion crack growth rate (CGR) reference curves for irradiated austenitic stainless steels in light water reactor (LWR) environments that were adopted as ASME B&PV Section XI Code Case N-889. As described in a technical basis Part 1 paper, over 800 CGR data points were collected from six laboratories worldwide, an international expert panel reviewed and ranked the data, and the better-ranked data were used to calibrate empirical models for irradiation-assisted stress corrosion cracking (IASCC) CGR in boiling water reactor (BWR) normal water chemistry (NWC), BWR hydrogen water chemistry (HWC) and pressurized water reactor (PWR) primary water environments. Part 1 also describes the custom fitting process, quality of fit, and comparisons with related literature and data not used for fitting. This technical basis Part 2 paper describes shifting the mean models to the 75th percentile of the calibration data, simplifying to produce the N-889 curves, and comparing with previous reference curves and over 500 data points not used for developing the N-889 curves, including weld, cast, and heat-affected-zone (HAZ) materials, additional wrought laboratory data, and field data from repeated inspection of BWR core shrouds. Part 2 also describes the irradiated yield stress model in Case N-889, compares that model with its calibration data and other data not used for calibration, and presents example calculations using both yield stress and CGR equations.


2020 ◽  
Vol 143 (2) ◽  
Author(s):  
Ernest D. Eason ◽  
Raj Pathania ◽  
Anders Jenssen

Abstract A multiyear international data collection, data review, modeling, and implementation project was recently completed, producing stress corrosion crack growth rate (CGR) models and reference curves for irradiated austenitic stainless steels in light water reactor (LWR) environments. The curves have been approved as ASME B&PV Section XI Code Case N-889, and this paper is the technical basis Part 1 for Case N-889, summarizing collection, review, and selection of calibration data, modeling, and analysis of fit. Over 800 CGR data points were collected from six laboratories worldwide, an international expert panel reviewed and ranked the data, and the better-ranked data were used to calibrate empirical models for irradiation-assisted stress corrosion cracking (IASCC) CGR in boiling water reactor (BWR) normal water chemistry (NWC), BWR hydrogen water chemistry (HWC), and pressurized water reactor (PWR) primary water environments. This Part 1 paper also discusses related literature and compares with other data not used for mean model calibration. A technical basis Part 2 paper describes shifting the mean models to the 75th percentile, simplifying to produce Case N-889 reference curves, and comparing with previous reference curves and over 500 data points not used for reference curve development, including weld, cast, and heat affected zone (HAZ) materials, additional wrought laboratory data, and field data from repeated inspection of BWR core shrouds. Part 2 also describes the irradiated yield stress model in Case N-889, compares that model with its calibration data and other data not used for calibration, and presents example calculations.


Consequentialism is a focal point of discussion and a driving force behind developments in moral philosophy. Recently, the debate has shifted in focus and in style: by seeking to consequentialize rival moral theories—in particular those with agent-relative characteristics—and by framing accounts in terms of reasons rather than in terms of value, an emerging new wave consequentialism has presented, at much higher levels of abstraction, theories that proved extremely flexible and powerful in meeting long-standing and influential objections. This volume on new wave consequentialism initiates and stimulates novel lines of discussion among proponents and their critics. The contributions explore new directions in new wave consequentialism and present refined conceptual frameworks (part I), raise challenging fundamental problems for these frameworks and the new wave’s theoretical basis (part II), and give a balanced assessment of the new wave’s limits and achievements in specific contexts of commonsense moral practice (part III).


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