scholarly journals Efficient Priority Access to the Shared Commercial Radio with Offloading for Public Safety in LTE Heterogeneous Networks

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
Chafika Tata ◽  
Michel Kadoch
Keyword(s):  
Heterogeneous Networks ◽  
Public Safety ◽  
The Other ◽  
Small Cells ◽  
Radio Network ◽  
Network Resources ◽  
Commercial Radio ◽  
Radio Resources ◽  
The Cost ◽  
The Impact

This paper presents the algorithm Courteous Priority Access to the shared commercial radio with offloading (CPAwO), for public safety network (PSN) over LTE heterogeneous networks (HetNets). We propose a solution for prioritization of PSN users with access to the commercial radio network resources. Our model offers additional radio resources to the PSN. Furthermore, it ensures a certain priority for commercial users by assigning quantities of additional radio resources through the courteous scheme. This allows delaying preemption and blocking bearers when the radio resources are limited. The other part of CPAwO model is to apply the principle of offloading in order to reduce the impact of the macrocell congestion. This technique is to switch the new bearers arriving at the LTE macrocells to small cells, in order to decrease the number of the blocked and interrupted bearers in the network. The results of the simulation showed that the allocation of radio resources via the courteous mechanism with offloading of new bearers to small cells reduces the rate of blocking bearers and delays the preemption of active bearers present in the LTE HetNets. It also reduces the cost of the end-to-end communications, thanks to the reallocation of free frequencies.

scholarly journals Methods for the estimation of the National Institute for Health and Care Excellence cost-effectiveness threshold

2015 ◽  
Vol 19 (14) ◽  
pp. 1-504 ◽  
Author(s):  
Karl Claxton ◽  
Steve Martin ◽  
Marta Soares ◽  
Nigel Rice ◽  
Eldon Spackman ◽  
...  
Keyword(s):  
Cost Effectiveness ◽  
Health Effects ◽  
The Other ◽  
Opportunity Costs ◽  
Best Estimate ◽  
The Cost ◽  
The Impact ◽  
The Relationship ◽  
Cost Effectiveness Threshold ◽  
Effectiveness Threshold

BackgroundCost-effectiveness analysis involves the comparison of the incremental cost-effectiveness ratio of a new technology, which is more costly than existing alternatives, with the cost-effectiveness threshold. This indicates whether or not the health expected to be gained from its use exceeds the health expected to be lost elsewhere as other health-care activities are displaced. The threshold therefore represents the additional cost that has to be imposed on the system to forgo 1 quality-adjusted life-year (QALY) of health through displacement. There are no empirical estimates of the cost-effectiveness threshold used by the National Institute for Health and Care Excellence.Objectives(1) To provide a conceptual framework to define the cost-effectiveness threshold and to provide the basis for its empirical estimation. (2) Using programme budgeting data for the English NHS, to estimate the relationship between changes in overall NHS expenditure and changes in mortality. (3) To extend this mortality measure of the health effects of a change in expenditure to life-years and to QALYs by estimating the quality-of-life (QoL) associated with effects on years of life and the additional direct impact on QoL itself. (4) To present the best estimate of the cost-effectiveness threshold for policy purposes.MethodsEarlier econometric analysis estimated the relationship between differences in primary care trust (PCT) spending, across programme budget categories (PBCs), and associated disease-specific mortality. This research is extended in several ways including estimating the impact of marginal increases or decreases in overall NHS expenditure on spending in each of the 23 PBCs. Further stages of work link the econometrics to broader health effects in terms of QALYs.ResultsThe most relevant ‘central’ threshold is estimated to be £12,936 per QALY (2008 expenditure, 2008–10 mortality). Uncertainty analysis indicates that the probability that the threshold is < £20,000 per QALY is 0.89 and the probability that it is < £30,000 per QALY is 0.97. Additional ‘structural’ uncertainty suggests, on balance, that the central or best estimate is, if anything, likely to be an overestimate. The health effects of changes in expenditure are greater when PCTs are under more financial pressure and are more likely to be disinvesting than investing. This indicates that the central estimate of the threshold is likely to be an overestimate for all technologies which impose net costs on the NHS and the appropriate threshold to apply should be lower for technologies which have a greater impact on NHS costs.LimitationsThe central estimate is based on identifying a preferred analysis at each stage based on the analysis that made the best use of available information, whether or not the assumptions required appeared more reasonable than the other alternatives available, and which provided a more complete picture of the likely health effects of a change in expenditure. However, the limitation of currently available data means that there is substantial uncertainty associated with the estimate of the overall threshold.ConclusionsThe methods go some way to providing an empirical estimate of the scale of opportunity costs the NHS faces when considering whether or not the health benefits associated with new technologies are greater than the health that is likely to be lost elsewhere in the NHS. Priorities for future research include estimating the threshold for subsequent waves of expenditure and outcome data, for example by utilising expenditure and outcomes available at the level of Clinical Commissioning Groups as well as additional data collected on QoL and updated estimates of incidence (by age and gender) and duration of disease. Nonetheless, the study also starts to make the other NHS patients, who ultimately bear the opportunity costs of such decisions, less abstract and more ‘known’ in social decisions.FundingThe National Institute for Health Research-Medical Research Council Methodology Research Programme.

Quantifying QoS in Heterogeneous Networks

2017 ◽  
pp. 223-251
Author(s):  
Farnaz Farid ◽  
Seyed Shahrestani ◽  
Chun Ruan
Keyword(s):  
Wireless Networks ◽  
Heterogeneous Networks ◽  
Heterogeneous Network ◽  
The Other ◽  
Simulation Studies ◽  
Network Resources ◽  
Access Technology ◽  
Vast Number ◽  
Simulation Results ◽  
4G Wireless

The heterogeneous-based 4G wireless networks will offer noticeable advantages for both users and network operators. The users will benefit from the vibrant coverage and capacity. A vast number of available resources will allow them to connect seamlessly to the best available access technology. The network operators, on the other hand, will be benefited from the lower cost and the efficient usage of the network resources. However, managing QoS for video or voice applications over these networks is still a challenging task. In this chapter, a generalized metric-based approach is described for QoS quantification in Heterogeneous networks. To investigate the efficiency of the designed approach, a range of simulation studies based on different models of service over the heterogeneous networks are carried out. The simulation results indicate that the proposed approach facilitates better management and monitoring of heterogeneous network configurations and applications utilizing them.

scholarly journals The Impact of Timber Harvesting Guidelines and Timber Sale Attributes on Stumpage Bidding Behavior

2005 ◽  
Vol 22 (4) ◽  
pp. 275-280 ◽  
Author(s):  
Michael A. Kilgore ◽  
Charles R. Blinn
Keyword(s):  
Forest Management ◽  
Timber Harvesting ◽  
Physical Characteristics ◽  
The Other ◽  
Sources Of Information ◽  
Bidding Behavior ◽  
Specific Factors ◽  
Timber Sale ◽  
The Cost ◽  
The Impact

Abstract Twenty-seven public timber tracts were auctioned in Minnesota where bidders were required to submit two sealed bids for a tract–one with and the other without the use of timber harvesting guidelines. After the auctions, bidders were mailed a questionnaire requesting information about their logging business, the sources of information consulted in developing their bids, and perceptions of how various tract- and sale-specific factors and guidelines influenced their bidding behavior. The majority of responding timber harvesters did not consult any special sources and only one-half visited the tract before submitting their bids. Although bidding behavior was influenced by several factors, a tract's physical characteristics (e.g., volume of merchantable timber) had a greater influence on their bidding behavior than did any guidelines. Of the guidelines evaluated, those that required leaving merchantable trees (e.g., for wildlife or visual purposes) were reported to have the greatest influence on stumpage bids. Sale-specific variables (e.g., timber harvester's need for timber) had only a minimal to moderate influence on bidding behavior. The findings suggest that timber sale design can help mitigate the cost associated with implementing forest management guidelines.North. J. Appl. For. 22(4):275–280.

The impact of government ownership on the cost of debt and valuation of Vietnamese listed companies

2020 ◽  
Vol 32 (2) ◽  
pp. 255-270
Author(s):  
Ben Le
Keyword(s):  
Instrumental Variable ◽  
Ordinary Least Squares ◽  
Firm Valuation ◽  
The Other ◽  
Cost Of Debt ◽  
Government Ownership ◽  
Content Type ◽  
The Cost ◽  
The Impact ◽  
The Relationship

Purpose This paper aims to examine the impact of government ownership on the cost of debt and firm valuation in listed Vietnamese companies for the period 2007 to 2016. Design/methodology/approach The authors use both the generalised methods of the moment (GMM) and the ordinary least squares (OLS) regressions to analyse a panel data spanning over the period 2007 to 2016 in the markets of Vietnam. Further, the instrumental variable is used in the paper. Findings The authors find that firms with relative higher government stockholdings or state-owned companies where the government owns 50 per cent or more of shares outstanding enjoy a lower cost of debt compared to the other firms. Consequently, these firms have higher firm valuation and profitability. The results are robust for both the GMM and the OLS regressions. Further, firms that no longer retain government ownership have a higher cost of debt than the other firms. The results of the paper imply the importance of political connections in businesses in the market of Vietnam. Originality/value This paper connects the relationship between government ownership and the cost of debt with the relationship between government ownership and firm valuation. The paper tests the relationship between the cost of debt and government ownership using both OLS and GMM specifications and the results are robust for both approaches. The manuscript uses an instrumental variable to show that government ownership has a positive impact on higher firm performance through reducing cost of debt. Further, this paper addresses the possible issue of endogeneity.

MAJOR PROJECTS AND THE ENVIRONMENT

1977 ◽  
Vol 17 (1) ◽  
pp. 142
Author(s):  
J. W. Butters
Keyword(s):  
Present Form ◽  
Economic Consequences ◽  
The Other ◽  
Exact Science ◽  
Main Trunk ◽  
Natural Gas Pipeline ◽  
Pipeline Project ◽  
Political Intervention ◽  
The Cost ◽  
The Impact

The realisation that man needs to work with nature rather than against it indicates growing maturity and awareness in the community. However, in dealing with the environment we need moderation. We need to remind ourselves that "environmentalism" is neither a profession nor an exact science. Answers are rarely certainly right or certainly wrong. As with most natural problems the best answers are usually a reasonable compromise.The Moomba-Sydney Natural Gas Pipeline Project was delayed 18 months. Two public Environmental Inquiries were held resulting from pressure from environmental groups.Following political intervention the first Inquiry caused a reroute of the main trunk adding 90 km (56 mi.) to its length and seriously delaying its commencement so that inflationary effects, added to the cost of the longer route and its complete resurvey, caused additional cost to the project of over $100 million.The second Inquiry required such change of the pipeline fundamentals, despite three years of comprehensive interdepartmental discussions held to ensure agreement, as to render the lateral under review economically unfeasible in its present form. Its cost would be something like six times its original estimate.Similar inflationary effects and uncertainties afflicted the other lateral causing its deferment also. The final cost of completing the whole project initially estimated at $155 million would now be in excess of $320 million.These deferments sprang principally from the economic consequences of environmental and/or industrial uncertainties. The communities which would otherwise have benefited by immediate service from relatively pollution-free energy are thus denied access to it. The impact of this deferment upon their own future environment was not called to account in the Inquiries.

Is More Better? The Divide between Retailer’s and Manufacturers’ Preferences for Reviews and Review Monetization

MIS Quarterly ◽  
2021 ◽  
Vol 45 (3) ◽  
pp. 1349-1410
Author(s):  
Haozhao Zhang ◽  
◽  
Zhe (James) Zhang ◽  
Srinivasan Raghunathan ◽  
◽  
...  
Keyword(s):  
Theoretical Model ◽  
The Other ◽  
Product Reviews ◽  
Case Scenario ◽  
Large Numbers ◽  
Research Stream ◽  
Dominant Retailer ◽  
Product Sales ◽  
The Cost ◽  
The Impact

Research on online product reviews has examined a variety of issues ranging from reviewers’ motivation to write reviews to the impact of reviews on product sales. Implicit in this research stream is the notion that more reviews are better for sellers and consumers. However, it is unclear whether both retailers, who control the review platform, and manufacturers, whose products are reviewed, prefer more reviews over fewer reviews. Using a game theoretical model of a context in which a dominant retailer sells competing products from two manufacturers to consumers who are uncertain about product quality and fit, we show that the retailers’ and manufacturers’ preferences regarding the number of reviews are not always aligned. The nature of misalignment depends on whether the quality or the fit is more dominant in terms of consumers’ evaluation of products. If generating reviews do not cost anything, we found that additional reviews always benefit the retailer; however, if the number of reviews exceeds a threshold in the quality-dominates-fit case scenario, they may be harmful to the manufacturer. On the other hand, if the retailer incurs a sufficiently high cost to generate reviews, the retailer may prefer to have fewer reviews. We show that retailers can exploit the divide between retailers’ and manufacturers’ preferences for reviews and monetize reviews by charging a fee to the manufacturers in return for a guarantee on the number of reviews that they generate. We show that the product type and review platform design play a significant role in the attractiveness of review monetization for retailers. Even if reviews are monetized, we determined that retailers’ revenue from “selling” reviews to manufacturers does not exceed the cost of generating reviews, implying that the benefit from reviews is driven the positive impacts of reviews on the retailer’s core business of selling products to consumers. However, in the fit-dominates-quality case scenario, retailers do not prefer large numbers of reviews whereas manufacturers do. In this case, we found that retailers are unable to exploit the misalignment between retailers’ and manufacturers’ preferences for reviews through review monetization.

Activism in a time of pandemic: The impact of COVID-19 in Chilean citizen movement after the uprising of October 2019

2021 ◽  
Vol 16 (2) ◽  
pp. 201-211 ◽  
Author(s):  
Paulina Bronfman
Keyword(s):  
Secondary School ◽  
Ocular Trauma ◽  
The Other ◽  
Health Crisis ◽  
Social Nature ◽  
Starting Point ◽  
The Social ◽  
Entire World ◽  
The Cost ◽  
The Impact

Chile, unlike other countries in the region, is facing two major crises: one of a large social nature and the other in public health, which is in its form of the pandemic that is currently affecting the entire world. In October 2019, secondary-school and university students organized a massive evasion of the Santiago metro fare. The reason was to protest the 30 pesos increase in the cost of the ticket. This apparently small issue detonated the greatest protest movement of the last 30 years. By January 2019, the uprising had left 31 dead and 5,558 people who reported human rights violations, including 331 with ocular trauma or injury to their eyes and 21 suffered damage or loss of the eyeball. In March 2019, protests were eradicated from the streets and the development of the movement was slowed down by the powerful action of the Coronavirus. This article explores the impact that the COVID-19 crisis had on citizen movement, and the functionality of the health crisis to establish the de facto authoritarian hyper-controlled state in order to freeze the social crisis. Also, this work identifies the strategy that the Chilean citizen movement developed to survive during 2020, applying Pleyers’s (2020) model of analysis of activism under pandemic as a starting point.

scholarly journals Heterogeneous networks: Fair power allocation in LTE-A uplink scenarios

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0252421
Author(s):  
Reben Kurda
Keyword(s):  
Power Control ◽  
Heterogeneous Networks ◽  
Spectral Efficiency ◽  
Network Performance ◽  
Fractional Power ◽  
Base Station ◽  
Small Cells ◽  
Lte Networks ◽  
Control Approach ◽  
The Impact

Effective management of radio resources and service quality assurance are two of the essential aspects to furnish high-quality service in Long Term Evolution (LTE) networks. Despite the base station involving several ingenious scheduling schemes for resource allocation, the intended outcome might be influenced by the interference, especially in heterogeneous scenarios, where many kinds of small cells can be deployed under the coverage of macrocell area. To develop the network of small cells, it is essential to take into account such boundaries, in particular, mobility, interference and resources scheduling a strategy which assist getting a higher spectral efficiency in anticipate small cells. Another challenge with small cellular network deployment is further analyzing the impact of power control techniques in the uplink direction for the network performance. With that being said, this article investigates the problem of interference in LTE-advanced heterogeneous networks. The proposed scheme allows mitigation inter-cell interference through fractional self-powered control performed at each femtocell user. This study analyzes a scheme with optimum power value that provides a compromise between the served uplink signal within unwanted interference plus noise ratio to enhance spectral efficiency in terms of throughput. In particular, the maximum transmit power for user equipment in uplink direction should be reviewed for small cells as a major contributor to the interference. The simulation results showed that the proposed fractional power control approach can outperform the traditional power control employed as a full compensation mode in small cell uplinks.

scholarly journals Absenteeism and the impact of a 38-hour week, rostered day off option

2000 ◽  
Vol 23 (4) ◽  
pp. 89 ◽  
Author(s):  
Ged Williams ◽  
Karen Slater
Keyword(s):  
Comparative Analysis ◽  
Sick Leave ◽  
The Other ◽  
The Cost ◽  
The Impact

We undertook a comparative analysis of nurses working in two consecutive years: one in a 40-hour standard workingweek and the other in a 38-hour week with a rostered day off per month, in order to determine whether there wasany effect on absenteeism. We found that total absenteeism between the two years fell significantly from 4.58% to4.36% ( 2 =5.09, P=0.024). Sick leave decreased but not to a significant degree.We conclude that the change to the 38-hour week and 19-day month (rostered day off ) arrangements led to asignificant reduction in overall absenteeism but not in sick leave. However, the cost in implementing a 19-day monthis far in excess of any savings made through absenteeism reductions.

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