scholarly journals Wireless Loss Detection over Fairly Shared Heterogeneous Long Fat Networks

Electronics ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 987
Author(s):  
Alan Briones ◽  
Adrià Mallorquí ◽  
Agustín Zaballos ◽  
Ramon Martin de Pozuelo
Keyword(s):  
Fair Use ◽  
Transport Protocol ◽  
Network Simulator ◽  
Network Congestion ◽  
Transport Protocols ◽  
Weighted Fairness ◽  
Different Types ◽  
Wireless Transport ◽  
And Performance

The quality of inter-network communication is often detrimentally affected by the large deployment of heterogeneous networks, including Long Fat Networks, as a result of wireless media introduction. Legacy transport protocols assume an independent wired connection to the network. When a loss occurs, the protocol considers it as a congestion loss, decreasing its throughput in order to reduce the network congestion without evaluating a possible channel failure. Distinct wireless transport protocols and their reference metrics are analyzed in order to design a mechanism that improves the Aggressive and Adaptative Transport Protocol (AATP) performance over Heterogeneous Long Fat Networks (HLFNs). In this paper, we present the Enhanced-AATP, which introduces the designed Loss Threshold Decision maker mechanism for the detection of different types of losses in the AATP operation. The degree to which the protocol can maintain throughput levels during channel losses or decrease production while congestion losses occur depends on the evolution of the smooth Jitter Ratio metric value. Moreover, the defined Weighted Fairness index enables the modification of protocol behavior and hence the prioritized fair use of the node’s resources. Different experiments are simulated over a network simulator to demonstrate the operation and performance improvement of the Enhanced-AATP. To conclude, the Enhanced-AATP performance is compared with other modern protocols.

scholarly journals Precise Compact System For Ionizing Radiation Detection And Signal Processing With Advanced Components Integration And Electronic Control

2015 ◽  
Vol 66 (4) ◽  
pp. 220-225 ◽  
Author(s):  
Jakub Navařík ◽  
Petr Novák ◽  
Jiří Pechoušek ◽  
Libor Machala ◽  
Dalibor Jančík ◽  
...  
Keyword(s):  
Nuclear Physics ◽  
Mössbauer Effect ◽  
Detection System ◽  
Radiation Detection ◽  
Mossbauer Effect ◽  
Natural Iron ◽  
Different Types ◽  
And Performance ◽  
Physics Experiments

Abstract Quality and performance of a detection system are the crucial parameters in all nuclear physics experiments. This system serves as a source of all signals and noises to be processed. Better performance, higher amplification and lower noises occurrence simplify subsequent signal analysis. In the field of Mössbauer spectroscopy, the spectrum quality and Mössbauer effect are crucial parameters which are affected especially by the quality of the detection system. These parameters were evaluated for different types of a detection setup. Finally an improvement of the spectrum quality by 15% and Mössbauer effect by 7% has been achieved for the natural iron reference absorber measurement in comparison with previous version of the detection system.

scholarly journals Heterogeneous wireless networks with mobile devices of multiple interfaces for simultaneous connections using Fuzzy System

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0247142
Author(s):  
Jorge Amaro de Sarges Cardoso ◽  
Fabio Pereira Ferreira da Silva ◽  
Tássio Costa de Carvalho ◽  
José Jailton Henrique Ferreira ◽  
Nandamudi Lankalapalli Vijaykumar ◽  
...  
Keyword(s):  
Wireless Networks ◽  
Fuzzy System ◽  
Heterogeneous Wireless Networks ◽  
Academic Community ◽  
Network Simulator ◽  
Multiple Interfaces ◽  
Exponential Increase ◽  
And Performance ◽  
Dual Interface

With the exponential increase in heterogeneous wireless networks today, there has been a growing interest from the academic community for issues related to handover problems. The main objective of this paper is to evaluate the quality of service and performance of a device with a dual interface that connects simultaneously to two heterogeneous networks with no competition in the exchange of packets between them. It is a proposal to solve the mitigation of handover impacts. The tool used for evaluation was the Network Simulator 2. The results showed a better use of the band in comparison to the scenario using a traditional mobile device.

scholarly journals Application of Rubrics in the Classroom: A Vital Tool for Improvement in Assessment, Feedback and Learning

2018 ◽  
Vol 12 (1) ◽  
pp. 61 ◽  
Author(s):  
Faieza Chowdhury
Keyword(s):  
Student Performance ◽  
Early Stage ◽  
Effective Feedback ◽  
Assessment Feedback ◽  
Different Types ◽  
Unbiased Manner ◽  
And Performance ◽  
Teaching Learning ◽  
Improve Student Learning

Teaching is filled with spirited debate about the best practices for improving students' learning and performance. Today, educators from different parts of the world are supporting the use of rubrics as an instructional tool and highlighting the enormous contributions that rubrics can make in the teaching-learning paradigm. A rubric is a useful grading tool which can help instructors to grade students' work in a more consistent, reliable and unbiased manner. A well-designed rubric can help students to identify their strengths and weaknesses and be more objective about their own quality of work. Although some studies have examined the benefits of rubrics on student performance levels; nevertheless, research on rubrics is still at an early stage. In this paper we will explore what a rubric is, the different types of rubrics that can be utilized in the classroom and the process of constructing a rubric. We will also discuss how the application of rubrics in teaching can help educators to improve student learning and provide more effective feedback on student performance.

scholarly journals Congestion Control in Wireless Network using TCP Friendly Rate Control (TFRC)

2019 ◽  
Vol 8 (2S3) ◽  
pp. 1598-1602
Keyword(s):  
Wireless Networks ◽  
Congestion Control ◽  
Wireless Network ◽  
Rate Control ◽  
System Throughput ◽  
Network Congestion ◽  
Tcp Friendly ◽  
Queueing Delay ◽  
And Performance

Throughout the years in wireless networks, congestion control has been widely explored. With the point of improving execution and performance in wireless network many techniques and methods have been built up over the years. It is very necessary to solve the issue of congestion control for the quick extension and execution of wireless technology. When a network link or node carries more data than its capacity then network congestion will occurs. In queueing theory and network congestion it reduces the quality of service. Normal impacts of congestion control include packet loss, blocking of new connections and queueing delay. As a result of congestion is to increment in offered load either just to a little increment or even a reduction in system throughput [1].There are many ways to control the congestion in wireless networks. We studied different techniques in this paper and also work through applying TCP friendly rate control.

scholarly journals The Q-Pass Index: A Multifactorial IMUs-Based Tool to Assess Passing Skills in Basketball

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4601
Author(s):  
Arturo Quílez-Maimón ◽  
Francisco Javier Rojas-Ruiz ◽  
Gabriel Delgado-García ◽  
Javier Courel-Ibáñez
Keyword(s):  
Inertial Sensors ◽  
Basketball Players ◽  
Video Cameras ◽  
Different Types ◽  
Practical Tool ◽  
And Performance ◽  
Pattern Variability ◽  
Different Levels ◽  
Practical Measure

Despite being a key sport-specific characteristic in performance, there is no practical tool to assess the quality of the pass in basketball. The aim of this study is to develop a tool (the quality-pass index or Q-Pass) able to deliver a quantitative, practical measure of passing skills quality based on a combination of accuracy, execution time and pass pattern variability. Temporal, kinematics and performance parameters were analysed in five different types of passes (chest, bounce, crossover, between-the-leg and behind-the-back) using a field-based test, video cameras and body-worn inertial sensors (IMUs). Data from pass accuracy, time and angular velocity were collected and processed in a custom-built excel spreadsheet. The Q-pass index (0–100 score) resulted from the sum of the three factors. Data were collected from 16 young basketball players (age: 16 ± 2 years) with high (experienced) and low (novice) level of expertise. Reliability analyses found the Q-pass index as a reliable tool in both novice (CV from 4.3 to 9.3%) and experienced players (CV from 2.8 to 10.2%). Besides, important differences in the Q-pass index were found between players’ level (p < 0.05), with the experienced showing better scores in all passing situations: behind-the-back (ES = 1.91), bounce (ES = 0.82), between-the-legs (ES = 1.11), crossover (ES = 0.58) and chest (ES = 0.94). According to these findings, the Q-pass index was sensitive enough to identify the differences in passing skills between young players with different levels of expertise, providing a numbering score for each pass executed.

Different types of functional training on the functionality and quality of life in postmenopausal women: a randomized and controlled trial

2020 ◽  
Vol 60 (9) ◽  
Author(s):  
José C. Aragão-Santos ◽  
Antônio G. de Resende-Neto ◽  
Marzo E. Da Silva-Grigoletto
Keyword(s):  
Quality Of Life ◽  
Postmenopausal Women ◽  
Controlled Trial ◽  
Functional Training ◽  
Different Types

LIGHTING AND PERFORMANCE: AN ANALYSIS ON LIGHTING EFFICIENCY OF ARCHITECTURE STUDIO

2019 ◽  
Vol 1 (1) ◽  
pp. 92
Author(s):  
Fazidah Hanim Husain
Keyword(s):  
Learning Environment ◽  
Comfort Level ◽  
Artificial Lighting ◽  
Level Measurement ◽  
Acceptable Range ◽  
Creative Learning ◽  
Illuminance Level ◽  
And Performance ◽  
Effect Of Light

Lighting is one of the key elements in any space and building infrastructure. Good design for an area in the building requires sufficient light that contributes to the efficiency of the activities. The correct method allows natural light to transmit, reduce heat and glare in providing a conducive learning environment. Light plays a significant influence to the quality of space and contributes focus of the students in an architecture studio. Previous research has shown that the effect of light also controlled emotions, behavior, and mood of the students. The operations of artificial lighting that have been used most of the time in an architecture studio during day and night may create lavishness and inadequacy at the same time. Therefore, this paper focuses on the identifying the quality of light for the architecture studio in UiTM (Perak), to instill a creative learning environment. Several methodologies adopted in this study such as illuminance level measurement using lux meter (LM-8100), and a questionnaire survey in gauging the lighting comfort level from students’ perspective. The study revealed that the illuminance level in the architecture studio is insufficient and not in the acceptable range stated in the Malaysian: Standards 1525:2007 and  not evenly distributed.  The study also concluded that the current studio environment is not condusive and appears monotonous. 

Strategic threats to energy security as risks of quality of people's life

2020 ◽  
Vol 16 (4) ◽  
pp. 730-744
Author(s):  
V.I. Loktionov
Keyword(s):  
Quality Of Life ◽  
Energy Security ◽  
Well Being ◽  
Scientific Methods ◽  
Analysis And Synthesis ◽  
General Scientific ◽  
And Performance ◽  
Economic Well Being ◽  
The Way

Subject. The article reviews the way strategic threats to energy security influence the quality of people's life. Objectives. The study unfolds the theory of analyzing strategic threats to energy security by covering the matter of quality of people's life. Methods. To analyze the way strategic threats to energy security spread across cross-sectoral commodity and production chains and influences quality of people's living, I applied the factor analysis and general scientific methods of analysis and synthesis. Results. I suggest interpreting strategic threats to energy security as risks of people's quality of life due to a reduction in the volume of energy supply. I identified mechanisms reflecting how the fuel and energy complex and its development influence the quality of people's life. The article sets out the method to assess such quality-of-life risks arising from strategic threats to energy security. Conclusions and Relevance. In the current geopolitical situation, strategic threats to energy security cause long-standing adverse consequences for the quality of people's life. If strategic threats to energy security are further construed as risk of quality of people's life, this will facilitate the preparation and performance of a more effective governmental policy on energy, which will subsequently raise the economic well-being of people.

Solving Network Congestion Problem by Quality of Service Analysis using OPNET

2016 ◽  
Vol 5 (4) ◽  
pp. 1
Author(s):  
TAWFEEQ FURAT N. ◽  
ABDALA MOHAMMED A. ◽  
◽  
Keyword(s):  
Quality Of Service ◽  
Network Congestion

Virtualized Fog Network with Load Balancing for IoT based Fog-to-Cloud

2020 ◽  
Vol 4 (3) ◽  
Author(s):  
Istabraq M. Al-Joboury ◽  
Emad H. Al-Hemiary
Keyword(s):  
Load Balancing ◽  
Packet Loss ◽  
Fog Computing ◽  
Transport Protocol ◽  
Network Simulator ◽  
Huge Number ◽  
Message Queue ◽  
Limited Bandwidth ◽  
Cloud Architecture ◽  
Fog Network

Fog Computing is a new concept made by Cisco to provide same functionalities of Cloud Computing but near to Things to enhance performance such as reduce delay and response time. Packet loss may occur on single Fog server over a huge number of messages from Things because of several factors like limited bandwidth and capacity of queues in server. In this paper, Internet of Things based Fog-to-Cloud architecture is proposed to solve the problem of packet loss on Fog server using Load Balancing and virtualization. The architecture consists of 5 layers, namely: Things, gateway, Fog, Cloud, and application. Fog layer is virtualized to specified number of Fog servers using Graphical Network Simulator-3 and VirtualBox on local physical server. Server Load Balancing router is configured to distribute the huge traffic in Weighted Round Robin technique using Message Queue Telemetry Transport protocol. Then, maximum message from Fog layer are selected and sent to Cloud layer and the rest of messages are deleted within 1 hour using our proposed Data-in-Motion technique for storage, processing, and monitoring of messages. Thus, improving the performance of the Fog layer for storage and processing of messages, as well as reducing the packet loss to half and increasing throughput to 4 times than using single Fog server.

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