scholarly journals Flexible Mixed-Criticality Scheduling with Dynamic Slack Management

2021 ◽  
Vol 30 (10) ◽  
pp. 2150306
Author(s):  
Xinyang Dong ◽  
Gang Chen ◽  
Mingsong Lv ◽  
Weiguang Pang ◽  
Wang Yi
Keyword(s):  
Quality Of Service ◽  
Execution Time ◽  
Time Behavior ◽  
Task Execution ◽  
Early Completion ◽  
Research Attention ◽  
The Past ◽  
Run Time ◽  
Mixed Criticality

Mixed-criticality (MC) system has attracted a lot of research attention in the past few years for its resource efficiency. Recent work attempted to provide a new MC model, the so-called Flexible Mixed-Criticality (FMC) task model, to relax the pessimistic assumptions in classic MC scheduling. However, in FMC, the behavior of MC tasks is still analyzed in offline stage. The run-time behavior such as dynamic slack has not yet been studied in FMC scheduling framework. In this paper, we present a utilization-based slack scheduling framework for FMC tasks. In particular, we monitor task execution on run time and collect dynamic slacks generated by task early completion. And these slacks can then be used either by high-criticality tasks to reduce mode-switches, or by low-criticality tasks so that less suspensions are triggered with more execution time, and thus quality of service is improved. We evaluate our approach with extensive simulations, and experiment results demonstrate the effectiveness of the proposed approaches.

Hybrid Load-Balanced Scheduling in Scalable Cloud Environment

2020 ◽  
Vol 11 (3) ◽  
pp. 62-78
Author(s):  
Anant Kumar Jayswal
Keyword(s):  
Quality Of Service ◽  
Execution Time ◽  
Performance Metrics ◽  
High Reliability ◽  
Task Completion ◽  
Ann Model ◽  
Start Time ◽  
Finish Time ◽  
Time Average

Cloud computing is a high computational distributed environment with high reliability and quality of service. It is playing an important role in the next generation of computing with pay per use model and high elasticity. With increased requirement for cloud resources, load over the cloud servers has increased, which makes cloud use a more efficient algorithm to maintain its performance and quality of service to users. The performance metrics that define the performance of task scheduling include execution time, finish time, scheduling time, task completion cost, and load balancing on each computing resources. So, to overcome existing solutions and provide better QoS performance, a neural-network-based GA-ANN scheduling algorithm is proposed in this paper, which outperforms the existing solutions. To simulate the proposed GA-ANN model, cloudsim3.0 toolkit is used, and the performance is evaluated by comparing simulation time, average start time, average finish time, execution time, and utilization percentage of computing resources (VMs).

Characteristics of the audit services market in the Russian Federation

2021 ◽  
Vol 23 (3) ◽  
pp. 54-58
Author(s):  
YULIA ARTEMOVA ◽  
Keyword(s):  
Quality Of Service ◽  
Service Provision ◽  
Large Scale ◽  
Small Companies ◽  
Existing Problems ◽  
The Past ◽  
The Russian Federation ◽  
The Cost ◽  
Audit Services Market

The article examines the state of the audit services market in Russia over the past three years. The author highlights the most important and relevant problems, such as dumping, the unattractive nature of the profession itself, the insufficient level of quality of service provision, and a decrease in income. The work reflects the factors that have the greatest impact on the activities of audit organizations, examines the possibilities for solving existing problems, and proposes measures to improve regulation in this area. In Russia, the market for audit services tends to enlarge its participants. Small companies face a choice when they must either join big enterprises or leave the market. The number of audit organizations and certified auditors is constantly declining. Since organizations limit their audit costs, audit companies reduce the cost of services they provide to retain their clients or acquire new ones. Currently, such price dumping is becoming large-scale. Another problem is the decline in the prestige of the profession. The lack of prospects in this area directly affects the decrease in the number of qualified specialists in the audit services market. Low demand for services has the greatest impact on audit organizations and individual auditors.

A Novel Degradation Scheme Based on User Satisfaction in CDMA Systems

2012 ◽  
Vol 198-199 ◽  
pp. 1678-1683
Author(s):  
Yong Wang ◽  
Xin Ge ◽  
Yu Bin Xu ◽  
Lin Ma
Keyword(s):  
Quality Of Service ◽  
User Satisfaction ◽  
Traditional Method ◽  
System Capacity ◽  
Cdma System ◽  
The Past ◽  
Cdma Systems ◽  
Simulation Results ◽  
Systems Simulation

Within the past few years, a great deal of attention has been drawn towards the CDMA system. The state of a CDMA system has two cases: saturation and instauration. After the system is saturated, no more users are allowed to access to CDMA systems with traditional method. In order to enhance the maximum number of users and the all users’ satisfaction while guaranteeing users’ quality of service (QoS) –SINR (signal-to-interference–plus-noise) requirement, this paper presents a degradation scheme based on user satisfaction in CDMA systems. Simulation results show that the proposed scheme can be allowed more users to access to and increase the total users’ satisfaction, leading to higher system capacity and resource utilization.

A Review of Recent Techniques in Mixed-Criticality Systems

2019 ◽  
Vol 28 (07) ◽  
pp. 1930007 ◽  
Author(s):  
Hongxia Chai ◽  
Gongxuan Zhang ◽  
Jin Sun ◽  
Ahmadreza Vajdi ◽  
Jing Hua ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Quality Of Service ◽  
Energy Consumption ◽  
Fault Tolerance ◽  
Embedded Systems ◽  
Design Requirement ◽  
Mixed Criticality

Unlike traditional embedded systems that almost have only one criticality level, many complex embedded systems nowadays are mixed-critical and are more and more widely used. There has been a lot of research on mixed-criticality (MC) systems. In this paper, we present a survey on the MC systems on these research. First, we discuss the exaltation of the schedulability of MC systems. As improving schedulability may lead to quality-of-service (QoS) reduction of MS systems. Therefore, we investigate the approaches to solve this problem. Improving QoS of MS systems may inevitably increase the energy consumption. Then, we introduce the researches that take the energy efficiency as a design requirement of MC systems. Few MC systems regard fault-tolerance as the design requirement, thus, we extensively investigate fault-tolerance of MC systems. In addition, we introduce some of the main applications for MC systems.

scholarly journals Consumer Behavior while Choosing Air Travel in India

2021 ◽  
Vol 9 (8) ◽  
pp. 2422-2428
Author(s):  
Vaibhav Kundu
Keyword(s):  
Quality Of Service ◽  
Consumer Behavior ◽  
Airline Industry ◽  
Air Travel ◽  
Quality Service ◽  
Multiple Factors ◽  
The Past ◽  
Domestic Airline ◽  
Number Of Customers

Abstract: The domestic airline industry of India has been witnessing an enormous transformation over the period. Different class of people can avail this service due to modern specifications, affordability rates, ease of reachability, frequency of flights, quality of service, etc. The recent studies depict that the number of customers opting for domestic air travel has a steep increase when compared to the past numbers. This has been possible due to increase in connectivity of different areas and reducing the flight fares to increase the accessibility and reachability for the customers. Reducing fares and increasing connectivity does not only help the customers but it has also helped a lot to contribute to the business of airlines to a very large extent. This research mainly focuses on the consumer behavior while choosing different airlines. There are multiple factors which affect while choosing the appropriate flight company for travelling. There are different class of customers and accordingly the airline companies need to match their preferences. Some consumers want affordable rates whereas some customers want better quality o service. This research will basically give an idea which factors pertain the most while choosing the perfect flight for domestic travel within India. Keywords: Quality Service, IndiGo, SpiceJet, Go Air, Air Asia, Vistara, Air India, Statista, Holidify

PERSONALISATION AND NATIVENESS AS TOOLS FOR INTERNET MARKETING

2021 ◽  
Author(s):  
Юлия Александровна Бакарюкина ◽  
Наталия Юрьевна Фоминых
Keyword(s):  
Quality Of Service ◽  
Internet Marketing ◽  
Target Audience ◽  
The Past ◽  
Single Night ◽  
Business Sectors

Уходящий год был полон неожиданностей и вызовов для всех отраслей бизнеса. Компании, которые хотели остаться активными игроками рынка, за одну ночь переписывали стратегии, экстренно внедряли новые инструменты продвижения, повышали качество сервиса. Не исключением стали основы персонализации и нативности, взятые за основу электронной коммерции в наше время. В данной статье рассмотрены основные Тенденции по увеличению количества каналов взаимодействия с целевой аудиторией в интернет маркетинге. The past year has been full of surprises and challenges for all business sectors. Companies that wanted to remain active players on the market rewrote strategies in a single night, urgently introduced new promotional tools, and improved the quality of service. The basics of personalisation and nativeness, taken as the basis for e-commerce these days, were no exception. This article reviews the main Trends in increasing the number of channels of interaction with the target audience in internet marketing.

An Adapted Ant-Inspired Algorithm for Enhancing Web Service Composition

Web Services ◽  
2019 ◽  
pp. 904-921
Author(s):  
Fadl Dahan ◽  
Khalil El Hindi ◽  
Ahmed Ghoneim
Keyword(s):  
Quality Of Service ◽  
Web Service ◽  
Ant Colony Optimization ◽  
Service Composition ◽  
Execution Time ◽  
Web Service Composition ◽  
Ant Colony ◽  
Diverse Population ◽  
Flexible Framework

Web Service Composition (WSC) provides a flexible framework for integrating independent web services to satisfy complex user requirements. WSC aims to choose the best web service from a set of candidates. The candidates have the same functionality and different non-functional criteria such as Quality of Service (QoS). In this work, the authors propose an ant-inspired algorithm for such problem. They named it Flying Ant Colony Optimization (FACO). Flying ants inject pheromone not only on the nodes on their paths but also on neighboring nodes increasing their chances of being explored in future iterations. The amount of pheromone deposited on these neighboring nodes is inversely proportional to the distance between them and the nodes on the path. The authors believe that by depositing pheromone on neighboring nodes, FACO may consider a more diverse population of solutions, which may avoid stagnation. The empirical experiments show that FACO outperform Ant Colony Optimization (ACO) for the WSC problem, in terms of the quality of solutions but it requires slightly more execution time.

Supporting Quality of Service for Internet Multimedia Applications

2011 ◽  
pp. 3622-3628
Author(s):  
Yew-Hock Ang
Keyword(s):  
Quality Of Service ◽  
Large Scale ◽  
The Internet ◽  
Digital Audio ◽  
Data Traffic ◽  
Service Model ◽  
The Past ◽  
Ip Multicasting ◽  
Scale Experiment

The Internet has gone from near-invisibility to near-ubiquity and penetrated into every aspect of society in the past decades (Department of Commerce, 1998). The application scenarios have also changed dramatically, and now demand a more sophisticated service model from the network. In the early 1990s, there was a large-scale experiment in sending digitized voice and video across the Internet through a packetswitched infrastructure (Braden, Clark, & Shenker, 1994). These highly-visible experiments have depended upon three enabling technologies: (1) Many modern workstations now come equipped with built-in multimedia hardware, (2) IP multicasting, which was not yet generally available in commercial routers, and (3) Highly-sophisticated digital audio and video applications have been developed. It became clear from these experiments that an important technical element of the Internet is still missing: multimedia, which dominate increasing proportion of today’s data traffic, are not well supported on the Internet.

scholarly journals Describing and Processing Topology and Quality of Service Parameters of Applications in the Cloud

2020 ◽  
Vol 18 (4) ◽  
pp. 761-778 ◽  
Author(s):  
Gabriele Pierantoni ◽  
Tamas Kiss ◽  
Gabor Terstyanszky ◽  
James DesLauriers ◽  
Gregoire Gesmier ◽  
...  
Keyword(s):  
Quality Of Service ◽  
Specific Aspect ◽  
Resource Utilisation ◽  
Different Types ◽  
Efficient Resource ◽  
Run Time ◽  
High Level ◽  
Quality Of Service Parameters ◽  
Cloud Applications

AbstractTypical cloud applications require high-level policy driven orchestration to achieve efficient resource utilisation and robust security to support different types of users and user scenarios. However, the efficient and secure utilisation of cloud resources to run applications is not trivial. Although there have been several efforts to support the coordinated deployment, and to a smaller extent the run-time orchestration of applications in the Cloud, no comprehensive solution has emerged until now that successfully leverages applications in an efficient, secure and seamless way. One of the major challenges is how to specify and manage Quality of Service (QoS) properties governing cloud applications. The solution to address these challenges could be a generic and pluggable framework that supports the optimal and secure deployment and run-time orchestration of applications in the Cloud. A specific aspect of such a cloud orchestration framework is the need to describe complex applications incorporating several services. These application descriptions must specify both the structure of the application and its QoS parameters, such as desired performance, economic viability and security. This paper proposes a cloud technology agnostic approach to application descriptions based on existing standards and describes how these application descriptions can be processed to manage applications in the Cloud.

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