Modeling and Performance Studies of ATM Networks Over Voice and Video

2012 ◽  
Vol 3 (3) ◽  
pp. 47-56
Author(s):  
Kashif Nisar ◽  
Nurul I. Sarkar
Keyword(s):  
Performance Studies ◽  
Asynchronous Transfer Mode ◽  
Real Life ◽  
Segment Length ◽  
Atm Networks ◽  
Atm Network ◽  
Type Data ◽  
And Performance ◽  
Network Technologies ◽  
The Impact

The Advanced Network Technologies is a research that investigates the technology(s) behind today’s modern networks and network infrastructures one of these technologies being Asynchronous Transfer Mode (ATM). Therefore, also focuses its attention on ATM. Dubbed “Modelling and Performance Studies of ATM Networks”; this research seeks to look at, and into, the impact of application segment length on the performance of an ATM network and the impact of traffic type data on the performance of an ATM network. To be able to examine an ATM network, we need to be able to simulate it somehow. This research, the authors have used the OPNET Modeler 14.0 simulation tool to create a network model that represents a real-life ATM network. And by actually simulating an ATM network at AUT University New Zealand, they can therefore change certain variables, and observe the effects the changes have on performance. As stated above, one of the impacts that will be explored is the effect that application segment length has on an ATM network. Thus, one variable that will be changed in our simulation is the segment length. This is the length of each packet segment that is sent through the network for a particular traffic type. The second impact to be inspected is the impact of different traffic types on an ATM network. For example, voice & video traffic should theoretically affect an ATM network

Modelling and Performance Studies of ATM Networks Over Email & FTP

2012 ◽  
Vol 4 (2) ◽  
pp. 16-25 ◽  
Author(s):  
Nurul I. Sarkar ◽  
Kashif Nisar
Keyword(s):  
Performance Studies ◽  
Asynchronous Transfer Mode ◽  
Real Life ◽  
Simulation Software ◽  
Segment Length ◽  
Atm Networks ◽  
Atm Network ◽  
Type Data ◽  
And Performance ◽  
The Impact

The Advanced Network Technologies is a research that investigates the technology(s) behind today’s modern networks and network infrastructures – one of these technologies being Asynchronous Transfer Mode (ATM); a technology commonly in place in networks all around the world today. Therefore, this paper focuses its attention on ATM. Dubbed “Modelling and Performance Studies of ATM Networks,” this research looks into the “impact of application segment length on the performance of an ATM network” and the “impact of traffic type data on the performance of an ATM network.” For this research, the authors have used the OPNET Modeler 14.0 Simulation software to create a network model that represents a real-life ATM network. By simulating an ATM network at AUT University New Zealand, the authors can change certain variables, and observe the effects the changes have on performance. As such, one of the impacts that will be explored is the effect that application segment length has on an ATM network. The second impact to be inspected is the impact of different traffic types on an ATM network. For example, Email traffic should theoretically affect an ATM network differently to the way that Voice traffic does. This way of thinking is what will be looked into further.

Performance Studies on Campus-Wide Focus on FTP, Video and VoIP Ethernet Network

2012 ◽  
Vol 4 (1) ◽  
pp. 49-59 ◽  
Author(s):  
Nuru I. Sarkar ◽  
Kashif Nisar ◽  
Layangi Babbage
Keyword(s):  
Network Model ◽  
Performance Studies ◽  
Asynchronous Transfer Mode ◽  
Simulation Software ◽  
Segment Length ◽  
Campus Network ◽  
Atm Network ◽  
Type Data ◽  
And Performance ◽  
The Impact

The Advanced Network Technologies is research that investigates technology(s) behind today’s modern networks and network infrastructures. One part of this technology being Asynchronous Transfer Mode (ATM). A technology commonly in place in networks all around the world today. This paper focuses on ATM. Dubbed “Modelling and Performance Studies of ATM Networks”; this research seeks to look at and into the “impact of application segment length on the performance of an ATM network” and the “impact of traffic type data on the performance of an ATM network”. To be able to examine an ATM network, the authors need to be able to simulate a network. Thus, for this research, they have used the OPNET Modeler 14.0 Simulation software to create a network model that represents a ATM network. By actually simulating an ATM network at AUT University New Zealand, the authors can therefore change certain variables, and observe the effects the changes have on performance. As stated, one of the impacts that will be explored is the effect that application segment length has on an ATM network. Thus, one variable that will be changed in the authors’ simulation is the segment length. This is the length of each packet segment that is sent through the network for a particular traffic type. The second impact to be inspected is the impact of different traffic types on an ATM network. This network model is based on a campus network. An Application Configuration is setup with default parameters which specify 8 common applications used. Among them the ones that the authors will focus on are VOIP, Video and FTP. A Profile Configuration is setup that will define the 3 applications stated above. A fixed node model of 100BaseT will specify the profile configuration for each scenario and the number of work stations of each scenario.

Voice and Video over Gigabit Ethernet and ATM Backbone Networks

2014 ◽  
pp. 174-184
Author(s):  
Nurul I. Sarkar ◽  
Yash Dole
Keyword(s):  
Quality Of Service ◽  
Network Performance ◽  
Performance Metrics ◽  
Asynchronous Transfer Mode ◽  
Atm Networks ◽  
Gigabit Ethernet ◽  
Corporate Networks ◽  
Backbone Networks ◽  
Network Technologies

This chapter aims to report on the performance of voice and video traffic over two popular backbone network technologies, namely Gigabit Ethernet (GbE) and Asynchronous Transfer Mode (ATM). ATM networks are being used by many universities and organizations for their unique characteristics such as scalability and guaranteed Quality of Service (QoS), especially for voice and video applications. Gigabit Ethernet matches ATM functionality by providing higher bandwidth at much lower cost, less complexity, and easier integration into the existing Ethernet technologies. It is useful to be able to compare these two technologies against various network performance metrics to find out which technology performs better for transporting voice and video conferencing. This chapter provides an in-depth performance analysis and comparison of GbE and ATM networks by extensive OPNET-based simulation. The authors measure the Quality of Service (QoS) parameters, such as voice and video throughput, end-to-end delay, and voice jitter. The analysis and simulation results reported in this chapter provide some insights into the performance of GbE and ATM backbone networks. This chapter may help network researchers and engineers in selecting the best technology for the deployment of backbone campus and corporate networks.

scholarly journals The Impact of Different Competitive Environments on Pacing and Performance

2018 ◽  
Vol 13 (6) ◽  
pp. 701-708 ◽  
Author(s):  
Marco J. Konings ◽  
Florentina J. Hettinga
Keyword(s):  
Fixed Effects ◽  
Linear Models ◽  
Real Life ◽  
Energy Resources ◽  
Mixed Linear Models ◽  
Start Position ◽  
Available Energy ◽  
Competitive Environments ◽  
And Performance ◽  
The Impact

Purpose: In real-life competitive situations, athletes are required to continuously make decisions about how and when to invest their available energy resources. This study attempted to identify how different competitive environments invite elite short-track speed skaters to modify their pacing behavior during head-to-head competition. Methods: Lap times of elite 500-, 1000- and 1500-m short-track speed skating competitions between 2011 and 2016 (N = 34,095 races) were collected. Log-transformed lap and finishing times were analyzed with mixed linear models. The fixed effects in the model were sex, season, stage of competition, start position, competition importance, event number per tournament, number of competitors per race, altitude, and time qualification. The random effects of the model were athlete identity and the residual (within-athlete race-to-race variation). Separate analyses were performed for each event. Results: Several competitive environments, such as the number of competitors in a race (a higher number of competitors evoked most likely a faster initial pace; coefficient of variation [CV] = 1.9–9.3%), the stage of competition (likely to most likely, a slower initial pace was demonstrated in finals; CV = −1.4% to 2.0%), the possibility of time qualification (most likely a faster initial pace; CV = 2.6–5.0%), and competition importance (most likely faster races at the Olympics; CV = 1.3–3.5%), altered the pacing decisions of elite skaters in 1000- and 1500-m events. Stage of competition and start position affected 500-m pacing behavior. Conclusions: As demonstrated in this study, different competitive environments evoked modifications in pacing behavior, in particular in the initial phase of the race, emphasizing the importance of athlete–environment interactions, especially during head-to-head competitions.

scholarly journals The Effects of Alcohol Hangover on Mood and Performance Assessed at Home

2020 ◽  
Vol 9 (4) ◽  
pp. 1068 ◽  
Author(s):  
Chris Alford ◽  
Zuzana Martinkova ◽  
Brian Tiplady ◽  
Rebecca Reece ◽  
Joris C. Verster
Keyword(s):  
Statistical Significance ◽  
Negative Mood ◽  
Real Life ◽  
General Level ◽  
Home Based ◽  
Alcohol Condition ◽  
Alcohol Hangover ◽  
And Performance ◽  
Thrill Seeking ◽  
The Impact

The current study evaluated the next day consequences of a social night of drinking compared to a no alcohol night, with standardised mood and portable screen-based performance measures assessed in the morning at participants’ homes, and a breathalyser screen for zero alcohol. A mixed sex group (n = 20) took part in the study. Participants reported consuming on average 16.9 units (135 g) alcohol, resulting in a hangover rating of 60 (out of 100) compared to 0.3 following the no alcohol night. Statistical significance comparisons contrasting the hangover with the no alcohol condition revealed an increase in negative mood and irritability during hangover and an (unexpected) increase in risk and thrill seeking. Performance scores showed an overall slowing of responses across measures, but with less impact on errors. The results support the description of hangover as a general state of cognitive impairment, reflected in slower responses and reduced accuracy across a variety of measures of cognitive function. This suggests a general level of impairment due to hangover, as well as increased negative mood. The use of a naturalistic design enabled the impact of more typical levels of alcohol associated with real life social consumption to be assessed, revealing wide ranging neurocognitive impairment with these higher doses. This study has successfully demonstrated the sensitivity of home-based assessment of the impact of alcohol hangover on a range of subjective and objective measures. The observed impairments, which may significantly impair daily activities such as driving a car or job performance, should be further investigated and taken into account by policy makers.

scholarly journals Energy Minimization Under Area and Performance Constraints for Multimedia Applications Realized on Embedded Cores

VLSI Design ◽  
2002 ◽  
Vol 14 (3) ◽  
pp. 273-286
Author(s):  
N. D. Zervas ◽  
K. Masselos ◽  
Y. A. Karayiannis ◽  
C. E. Goutis
Keyword(s):  
Real Life ◽  
Original Description ◽  
Multimedia Applications ◽  
Major Step ◽  
Performance Constraints ◽  
Data Memory ◽  
Embedded Cores ◽  
And Performance ◽  
High Level ◽  
The Impact

A systematic methodology for energy dissipation reduction of multimedia applications realized on architectures based on embedded cores and application specific data memory organization is proposed. Performance and area are explicitly taken into account. The proposed methodology includes two major steps: A high-level code transformation step that reorganizes the original description of the target application. The second major step includes the determination of the processor, memory and bus organization of the system and is briefly described. Experimental results from several real-life demonstrators prove the impact of the high level step of the proposed methodology.

scholarly journals Online appropriations: collaborative technologies, digital texts, and Shakespeare’s authority

Authorship ◽  
2011 ◽  
Vol 1 (1) ◽  
Author(s):  
Jenni Ramone
Keyword(s):  
Performance Studies ◽  
Digital Technology ◽  
Digital Technologies ◽  
Digital Tools ◽  
Digital Repositories ◽  
Collaborative Technologies ◽  
Internet Users ◽  
Democratic Engagement ◽  
And Performance ◽  
The Impact

This article considers the impact of digital technologies on Shakespeare's status as author. Digital technology encourages a more democratic engagement with literature which privileges the reader and thereby moderates the author's powerful hold over their text. As a result, it is to be expected that with the increased availability of digital tools, Shakespeare's status and conventional, universalist readings of his works might decline. Technologies have the potential to open up Shakespeare's works to new kinds of readers: these include academics studying Shakespeare's works perspectives outside the traditional disciplines of literary and performance studies, but also the general public who appropriate Shakespeare when shaping their online identities, or contribute to digital repositories of Shakespeare references. My paper considers the contradiction that while, in theory, digital technologies invite the reader to wrest control from the author, in practice those tools are sometimes used to bolster Shakespeare's universal value and genius. I consider the ultimate effect on Shakespeare's author status when digital technologies are applied to his works, and suggest that one way to measure this might be to explore appropriations of Shakespeare's characters online by individual internet users.

An Investigation of Impact of the Product Family Design on the Shop Floor Performance

2008 ◽  
Author(s):  
Hakan U. Artar ◽  
Gu¨l Okudan
Keyword(s):  
Decision Making ◽  
Real Life ◽  
Product Family ◽  
Shop Floor ◽  
Design Decision ◽  
Product Family Design ◽  
Computer Simulation Study ◽  
Family Case ◽  
And Performance ◽  
The Impact

While many approaches have been proposed to optimize the product family design for measures of cost, revenue and performance, many of these approaches fail to incorporate the complexity of the manufacturing issues into family design decision-making. One of these issues is different approaches for assembly sequencing. This paper presents a computer simulation study by which the impact of two postponement strategies is investigated for a real-life product family case under various demand conditions. Overall, the results indicate that when the product family design takes into account the assembly sequencing decisions, the outcomes at the shop floor level improve. The results have implications for companies that are looking into increasing their revenue without increasing their investment in the shop floor.

Finding Your Own Voice

2017 ◽  
Author(s):  
Helen Phelan
Keyword(s):  
Performance Studies ◽  
Performance Practice ◽  
Practice Theory ◽  
Core Values ◽  
Cultural Space ◽  
And Performance ◽  
The Impact

Chapter 3 introduces the Irish World Academy of Music and Dance and its emergence as a key site of cultural debate and performance in the 1990s. It explores ways in which mythology, symbol, and ritual are constantly evoked within the Academy to reinforce, contest, and perform its core values of inclusivity, creativity, and respect for diversity. It examines the impact of practice theory on understandings of performance. Practice theory and performance studies have helped singers, dancers, and musicians recast their activities, not as passive “inscriptions” onto their bodies in socially structured rituals, but as active, intelligent practices, influencing social and cultural space through performance. It suggests that the Academy continuously ritualizes and performs its ethos of creative belonging.

Death by Drama and Other Medieval Urban Legends. By Jody Enders. Chicago: University of Chicago Press, 2002; pp. xxx + 324; 9 illus. $35 cloth.

2005 ◽  
Vol 46 (1) ◽  
pp. 159-161
Author(s):  
Claire Sponsler
Keyword(s):  
Performance Studies ◽  
Real Life ◽  
Theatre History ◽  
Potential Threat ◽  
Social Functions ◽  
Urban Legends ◽  
Artistic Representation ◽  
And Performance ◽  
French Theatre ◽  
University Of Chicago Press

Death by Drama is revisionist theatre history at its invigorating best. Taking her cue from modern studies of urban legends, Jody Enders treats theatrical apocrypha—such as the well-known account of a convicted heretic who was supposedly executed on stage during a performance of the drama of Judith and Holofernes in 1549 in Tournai—not as fact, as such stories have often unquestioningly been taken, but as medieval urban legends that reveal spectators' attitudes toward the theatre as a place of potential threat where the true and the false dangerously mix. Looking at such legends as expressions of a culture's specific hopes, fears, and anxieties, Enders examines the “ways in which early France told, retold, invented, and reinvented stories of the tenuous boundaries between theatre and real life, thereby helping audiences to confront the nature of artistic representation” (xxiv). Although Enders's focus is medieval French theatre, her reach extends to modern theatre, film, and media, and her impeccable historical scholarship is enriched by savvy recourse to contemporary critical theory and performance studies. The resulting book shakes up settled assumptions about “what really happened” on the medieval stage, while raising profound questions about theatre's social functions then and now.

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