Optimization of the Return Link Carrier Planning for a Constant Coding and Modulation Satellite Network

In this paper, we propose an approach to optimize the frequency plan and associated bandwidth allocation in the return link of a broadband satellite network, by exploring several design techniques for carrier allocation plans. Since bandwidth is a limited resource in satellite telecommunications, the minimization of bandwidth usage is a core issue that satellite communication service providers must solve, in particular for networks using a constant coding and modulation plan, which lacks the flexibility found in newer satellite communication products and can be subject to hardware constraints. This problematic led us to raise the following question: how can the long term bandwidth requirement of the network be minimized, given a set of ground terminals, of Modulations and Codings, and of discrete bandwidths. In this document we formally define the long-term carrier allocation problem and analyze current practical solutions. We subsequently investigate two other potential solutions, found to be more bandwidth-efficient: one based on heuristics and another based on integer linear programming. Finally, we look at the impact of several parameters on the performance of those three methods. Overall we observed marginal reductions in bandwidth, however significant gains were reached for networks with small return links with low committed information rate, a case in which some constant coding and modulation networks could fall. We concluded that those networks could benefit from our methods and see a significant reduction in bandwidth, and subsequently operational costs, at low implementation costs.

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Bandwidth allocation in a multiservice satellite network based on long-term weather forecast scenarios

Computer Communications ◽

10.1016/s0140-3664(02)00018-x ◽

2002 ◽

Vol 25 (11-12) ◽

pp. 1037-1046 ◽

Cited By ~ 5

Author(s):

Raffaele Bolla ◽

Nedo Celandroni ◽

Franco Davoli ◽

Erina Ferro ◽

Mario Marchese

Keyword(s):

Bandwidth Allocation ◽

Weather Forecast ◽

Satellite Network

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INTEGRATING ACUTE AND LONG-TERM SERVICES: DOES IT WORK, CAN IT WORK, WILL IT WORK?

Innovation in Aging ◽

10.1093/geroni/igz038.848 ◽

2019 ◽

Vol 3 (Supplement_1) ◽

pp. S229-S230

Author(s):

Robert A Applebaum ◽

Jennifer Heston

Keyword(s):

Managed Care ◽

Integrated Care ◽

Care Management ◽

Service Providers ◽

Care Staff ◽

Care Plan ◽

Management Model ◽

Management Models ◽

The Impact

Abstract The expansion of managed long-term services and supports has generated considerable interest over the last decade. However, studies on the impact of these efforts have produced mixed findings. Additionally, there is limited information about the care management models used in implementation. This lack of data makes it impossible to assess whether differences in managed care plan approaches have an impact on participants. Our study sought to gain better understanding of the integrated care management models being implemented in Ohio’s MyCare Demonstration. Through qualitative interviews with 50 respondents, including area agency care managers, managed care staff, and service providers, we documented strengths and weaknesses of one integrated care management model used in Ohio’s demonstration. Understanding what is inside the black box of managed care/care management model implementation is key to gaining insights into whether such an approach can ultimately improve the health and long-term service systems for older people with disability.

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Sustainability Assessment of Provincial-Level Regions in China Using Composite Sustainable Indicator

Sustainability ◽

10.3390/su11195289 ◽

2019 ◽

Vol 11 (19) ◽

pp. 5289 ◽

Cited By ~ 1

Author(s):

Yi ◽

Lu ◽

Zhang ◽

Keyword(s):

Sustainability Assessment ◽

Competitive Advantages ◽

Ecological Civilization ◽

Provincial Level ◽

Core Issue ◽

Policy Priority ◽

The Individual ◽

The Impact ◽

Development Prospects

Sustainability development is a core issue and policy-priority in China to meet the long-term ecological civilization and economic growth. In this paper, the sustainability of the 31 Chinese provincial-level administrative regions (provinces for short) was investigated using a composite sustainability indicator (CSI). The CSI was constructed by aggregating thirty sustainability indicators involving economic, social, and environmental dimensions hierarchically. Moreover, a piecewise mean range normalization method was developed for weakening the impact of outlier(s). The results indicate that further improvement of the provinces’ sustainability is needed, since only three provinces (accounting for 9.68%) showed better performance and development momentum, simultaneously. However, over half of the provinces showed comparatively optimistic sustainability prospect, indicating a possibility of further sustainability improvement in China under a positive and effective guidance. In terms of the individual provinces, the decline of the sustainability of Liaoning and Tianjin was significant whereas Anhui, Hunan, and Hubei showed more optimistic development prospects. For the four regions, Middle China was on the rise, the decline of Northeastern China was serious, and East China and West China showed better development, but they should also keep vigilance on the possible decline because of the decline of competitive advantages.

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Independent visiting with children in care during the pandemic: Disruptions and discoveries

Qualitative Social Work ◽

10.1177/1473325020981087 ◽

2021 ◽

Vol 20 (1-2) ◽

pp. 383-389 ◽

Cited By ~ 1

Author(s):

Rebecca K Jones ◽

David Westlake

Keyword(s):

Young People ◽

Service Providers ◽

Personal Experiences ◽

Challenges And Opportunities ◽

Children In Care ◽

The Impact ◽

Care System

This essay describes the impact of the pandemic on our experiences as Independent Visitors (IVs) forchildren who are looked-after. Independent Visitors are volunteers who visit, advise and befriend children with the aim of helping them develop a positive, long-term relationship beyond the care system. Based on our personal experiences of being matched with and visiting two young people, we consider how supporting the children remotely during the pandemic has helped us reflect on our relationships with them and our role as IVs. We discuss the role that foster carers play in supporting the IV relationship, the significance of developing routines and rituals with young people, and the challenges and opportunities offered by the transition from visits to virtual contact. We conclude with an outline of the response of service providers to the pandemic, and suggest that increased support for Independent Visiting might improve provision and allow more children to benefit from a relationship with an Independent Visitor.

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Improving practice learning

The Journal of Practice Teaching and Learning ◽

10.1921/jpts.v8i1.362 ◽

2012 ◽

Vol 8 (1) ◽

pp. 5-17

Author(s):

Linda Bruce

Keyword(s):

Social Work ◽

Service Providers ◽

Social Work Students ◽

Negative Consequences ◽

Personal Impact ◽

The United Kingdom ◽

Student Demand ◽

Work Education ◽

The Impact

Undertaking practice placements (fieldwork instruction, agency-based practice learning) is an integral part of professional social work education and training across the United Kingdom. Scottish universities and partner social work service providers have however experienced long term challenges in an effort to ensure that an adequate number of practice placements were available to meet the student demand. Particularly well documented are the problems associated with a shortfall in the number of active practice teachers (fieldwork educators and practice learning facilitators) and agency settings willing to take a student.Less is known however about the impact of a shortfall of practice placements has on social work students themselves. This article outlines the findings of a survey, involving 164 social work Students, which explores the personal impact of a delayed start to a practice placement and describes one University’s attempt to eliminate these negative consequences for students by implementing new approaches to the organisation and delivery of practice learning.

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Drivers of long-term savings behavior from the consumers’ perspective

International Journal of Bank Marketing ◽

10.1108/ijbm-11-2014-0168 ◽

2015 ◽

Vol 33 (7) ◽

pp. 922-943 ◽

Cited By ~ 6

Author(s):

Matthias Ruefenacht ◽

Tobias Schlager ◽

Peter Maas ◽

Pekka Puustinen

Keyword(s):

Social Context ◽

Indirect Effect ◽

Online Survey ◽

Service Providers ◽

Savings Behavior ◽

Content Type ◽

The Social ◽

Savings Rate ◽

The Impact

Purpose – The purpose of this paper is to delineate the impact of social context and savings attitudes on consumers’ self-reported long-term savings and discuss how these drivers can be influenced to increase an individual’s savings rate. Design/methodology/approach – An online survey was conducted among 993 German savers. A structural equation model quantified the influence of the social context and an individual’s attitudes on long-term savings behavior, as stated by consumers. Findings – Both social context constructs – subjective norms and relationship quality – exert a significant influence on the savings attitudes of perceived anxiety and perceived importance, which in turn significantly affect long-term savings. Furthermore, the results of a mediation analysis indicated that the social context only has an indirect effect on long-term savings. Research limitations/implications – The study was conducted in Germany only. Therefore, the results may not apply across cultures. In addition, the salient belief structures, access channels used, and savings product categories were not part of this study. Practical implications – The results showed that financial institutions can influence an individual’s attitudes toward long-term savings by providing a satisfying and trusted relationship. The positive effect on savings attitudes will translate to an increased long-term savings rate. According to the analysis, financial service providers can only have an indirect effect on long-term savings behavior. Originality/value – This paper delineates the impact of the social environment on long-term savings. This relationship has not been investigated in previous research. In addition, the influence of the social context within the attitudes-behavior framework for long-term savings is expounded.

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Measuring QoS in an Aeronautical Opportunistic Network Architecture with Limited Access to a Satellite Communications Backhaul

Mobile Information Systems ◽

10.1155/2016/7601316 ◽

2016 ◽

Vol 2016 ◽

pp. 1-12 ◽

Cited By ~ 2

Author(s):

Rubén Martínez-Vidal ◽

Ramon Martí ◽

Cormac J. Sreenan ◽

Joan Borrell

Keyword(s):

Bandwidth Allocation ◽

Network Architecture ◽

Satellite Communication ◽

Satellite Communications ◽

Delivery Ratio ◽

Opportunistic Network ◽

Scarce Resources ◽

Communication Links ◽

Graph Sparsification ◽

The Impact

We measure quality of service (QoS) in a wireless network architecture of transoceanic aircraft. A distinguishing characteristic of the network scheme we analyze is that it mixes the concept of Delay Tolerant Networking (DTN) through the exploitation of opportunistic contacts, together with direct satellite access in a limited number of the nodes. We provide a graph sparsification technique for deriving a network model that satisfies the key properties of a real aeronautical opportunistic network while enabling scalable simulation. This reduced model allows us to analyze the impact regarding QoS of introducing Internet-like traffic in the form of outgoing data from passengers. Promoting QoS in DTNs is usually really challenging due to their long delays and scarce resources. The availability of satellite communication links offers a chance to provide an improved degree of service regarding a pure opportunistic approach, and therefore it needs to be properly measured and quantified. Our analysis focuses on several QoS indicators such as delivery time, delivery ratio, and bandwidth allocation fairness. Obtained results show significant improvements in all metric indicators regarding QoS, not usually achievable on the field of DTNs.

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Suppressed, but Not Forgotten

Swiss Journal of Psychology ◽

10.1024/1421-0185/a000033 ◽

2011 ◽

Vol 70 (1) ◽

pp. 5-11 ◽

Cited By ~ 8

Author(s):

Beat Meier ◽

Anja König ◽

Samuel Parak ◽

Katharina Henke

Keyword(s):

Memory Trace ◽

Thought Suppression ◽

Test Phase ◽

Indirect Test ◽

Final Test ◽

Test Experiment ◽

And Control ◽

Cue Words ◽

The Impact

This study investigates the impact of thought suppression over a 1-week interval. In two experiments with 80 university students each, we used the think/no-think paradigm in which participants initially learn a list of word pairs (cue-target associations). Then they were presented with some of the cue words again and should either respond with the target word or avoid thinking about it. In the final test phase, their memory for the initially learned cue-target pairs was tested. In Experiment 1, type of memory test was manipulated (i.e., direct vs. indirect). In Experiment 2, type of no-think instructions was manipulated (i.e., suppress vs. substitute). Overall, our results showed poorer memory for no-think and control items compared to think items across all experiments and conditions. Critically, however, more no-think than control items were remembered after the 1-week interval in the direct, but not in the indirect test (Experiment 1) and with thought suppression, but not thought substitution instructions (Experiment 2). We suggest that during thought suppression a brief reactivation of the learned association may lead to reconsolidation of the memory trace and hence to better retrieval of suppressed than control items in the long term.

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