A cost-effective voltage security constrained congestion management approach for transmission system operation improvement

2022 ◽  
Vol 203 ◽  
pp. 107674
Author(s):  
Mahmoud Roustaei ◽  
Armin Letafat ◽  
Morteza Sheikh ◽  
Alireza chabok ◽  
Ramin Sadoughi ◽  
...  
Keyword(s):  
Cost Effective ◽  
Congestion Management ◽  
Transmission System ◽  
Management Approach ◽  
System Operation ◽  
Voltage Security ◽  
Effective Voltage

scholarly journals Contention and congestion minimization in OBS networks

2017 ◽  
Author(s):  
◽  
Ndadzibaya Masimba Gomba
Keyword(s):  
Optical Networks ◽  
Network Performance ◽  
Cost Effective ◽  
Congestion Management ◽  
Fair Use ◽  
Management Approach ◽  
Core Network ◽  
Effective Manner ◽  
Successful Establishment ◽  
End To End

All-optical networks (AON) based optical burst switching (OBS) promise to be the ultimate backbone network technology solution for next generation( NG) as well as fu­ ture generation (FG)networks because of their relatively higher resources utilization, great flexibility at lower cost and potential massive bandwidth capacities both at trans­ mission and switching levels. By design, buffering is not provisioned in interior nodes. End users exchange data with one another through end-to-end light channels, called lightpaths in which wavelength continuity is maintained. In practice, their establish­ ing, in a cost effective manner remains an inescapable challenge. The routing and wave­ length assignment (RWA) problem entices successful establishment of a physical route for each lightpath connection request, assigning a wavelength to each route and at the same time ensm·ing end to end continuity, subject to the limited number of wave­ lengths. The wavelengths must be assigned such that no lightpaths can share the same wavelength simultaneously on a given fibre, or else contentions may occur. Some data bursts may be discarded whenever contention occurs among multiple bursts that arrive simultaneously at any interior node using the same wavelength and are intended for the same output port. Because of the buffer-less nature of OBS networks, conten­ tion/congestion in the core network can quickly lead to degradation in overall network performance at moderate to high traffic levels due to heavy burst loses. In this disser­ tation we propose and evaluate a congestion management approach we refer to as '"en­ hanced congestion management" which gears towards rendering and guaranteeing a consistent QoS as well as rational and fair use of available network links. Simulation results show that the scheme can effectively minimize both contention and congestion and at the same time improving both throughput and effective utilization under mod­ erate to high network traffic loads

scholarly journals Active Surveillance of Small Renal Masses: A Systematic Review

Kidney Cancer ◽  
2021 ◽  
pp. 1-14
Author(s):  
Elizabeth E. Ellis ◽  
Edward Messing
Keyword(s):  
Active Surveillance ◽  
Meta Analysis ◽  
Cost Effective ◽  
Management Approach ◽  
Small Renal Masses ◽  
Cancer Specific Survival ◽  
Renal Masses ◽  
Review Current ◽  
Delayed Intervention

Background: Our goal is to review current literature regarding active surveillance (AS) of small renal masses (SRMs) and identify trends in survival outcomes, factors that predict the need for further intervention, and quality of life (QOL). Methods: We performed a comprehensive literature search in PubMed and EMBASE and identified 194 articles. A narrative summary was performed in lieu of a meta-analysis due to the heterogeneity of selected studies. Results: Seventeen articles were chosen to be featured in this review. Growth rate (GR) was not an accurate predictor of malignancy, although it was the characteristic most commonly used to trigger delayed intervention (DI). The mean 5-year overall survival (OS) of all studies was 73.6% ±1.7% for AS groups. The combined cancer specific survival (CSS) for AS is 97.1% ±0.6% , compared to 98.6% ±0.4% for the primary intervention (PI) groups, (p = 0.038). Conclusions: Short and intermediate-term data demonstrate that AS with the option for DI is a management approach whose efficacy (in terms of CSS) approaches that of PI at 5 years, is cost effective, and prevents overtreatment, especially in patients with significant comorbidities.

scholarly journals Changing the Game - Can A Sport-Based Youth Development Programme Generate a Positive Social Return on Investment?

2018 ◽  
Vol 15 (1) ◽  
Author(s):  
Ben Sanders ◽  
Emanuel Raptis
Keyword(s):  
Young People ◽  
Youth Development ◽  
Return On Investment ◽  
Cost Effective ◽  
Management Approach ◽  
Social Return On Investment ◽  
Sport For Development ◽  
External Stakeholders ◽  
Employment Education ◽  
And Training

This study examines a sport for development and peace intervention initiated by Grassroot Soccer South Africa that promotes youth employability and leadership. A results-based management approach and a social return on investment methodology were used to track the young people during and after the intervention. Preliminary results offer encouraging evidence of progress into employment, education and training with positive social returns for the youth and external stakeholders, suggesting that this investment is cost-effective and impactful. The results indicate that structured sport-based programmes can put young people to work and study in a constructive manner, thereby stimulating economic growth and development. It is concluded that initiatives using sport to promote youth work merit greater investment, recognition and research.

Congestion management considering voltage security of power systems

2009 ◽  
Vol 50 (10) ◽  
pp. 2562-2569 ◽  
Author(s):  
Masoud Esmaili ◽  
Heidar Ali Shayanfar ◽  
Nima Amjady
Keyword(s):  
Power Systems ◽  
Congestion Management ◽  
Voltage Security
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