COADA

2012 ◽  
pp. 238-257
Author(s):  
Long Vu ◽  
Klara Nahrstedt ◽  
Rahul Malik ◽  
Qiyan Wang
Keyword(s):  
P2p Network ◽  
Mobile Users ◽  
Mobile Nodes ◽  
Performance Improvements ◽  
Point Of Interest ◽  
Adaptive Protocol ◽  
Wireless Interfaces ◽  
The Relationship ◽  
Coalition Size ◽  
Adaptive Content

This paper argues that Dynamic Coalition Peer-to-Peer (P2P) Network exists in numerous scenarios where mobile users cluster and form coalitions, and the relationship between sizes of coalitions and distances from mobile nodes to their Point of Interest (PoI) follows exponential distributions. The P2P coalition patterns of mobile users and their exponential distribution behavior can be utilized for efficient and adaptive content file download of cellular users. An adaptive protocol named COADA (COalition-aware Adaptive content DownloAd) is designed that (a) blends cellular and P2P (e.g., WiFi or Bluetooth) wireless interfaces, (b) leverages the clustering of people into P2P coalitions when moving towards PoI, and (c) utilizes exponential-coalition-size function of the Dynamic Coalition P2P Network to minimize the cellular download and meet content file download deadline. With COADA protocol, mobile nodes periodically sample the current P2P coalition size and predict the future coalition size using the exponential function. In order to decide how much file data is available in P2P coalition channels versus how much file data must be downloaded from the server over the cellular network, Online Codes techniques are used and tune cellular download timers to meet the file download deadline. The simulation results show that COADA achieves considerable performance improvements by downloading less file data from the cellular channel and more file data over the P2P coalition network while meeting the file download deadline.

COADA

2011 ◽  
Vol 2 (2) ◽  
pp. 1-22 ◽  
Author(s):  
Long Vu ◽  
Klara Nahrstedt ◽  
Rahul Malik ◽  
Qiyan Wang
Keyword(s):  
P2p Network ◽  
Mobile Users ◽  
Mobile Nodes ◽  
Exponential Distributions ◽  
Performance Improvements ◽  
Point Of Interest ◽  
Wireless Interfaces ◽  
The Relationship ◽  
Coalition Size ◽  
Adaptive Content

This paper argues that Dynamic Coalition Peer-to-Peer (P2P) Network exists in numerous scenarios where mobile users cluster and form coalitions, and the relationship between sizes of coalitions and distances from mobile nodes to their Point of Interest (PoI) follows exponential distributions. The P2P coalition patterns of mobile users and their exponential distribution behavior can be utilized for efficient and adaptive content file download of cellular users. An adaptive protocol named COADA (COalition-aware Adaptive content DownloAd) is designed that (a) blends cellular and P2P (e.g., WiFi or Bluetooth) wireless interfaces, (b) leverages the clustering of people into P2P coalitions when moving towards PoI, and (c) utilizes exponential-coalition-size function of the Dynamic Coalition P2P Network to minimize the cellular download and meet content file download deadline. With COADA protocol, mobile nodes periodically sample the current P2P coalition size and predict the future coalition size using the exponential function. In order to decide how much file data is available in P2P coalition channels versus how much file data must be downloaded from the server over the cellular network, Online Codes techniques are used and tune cellular download timers to meet the file download deadline. The simulation results show that COADA achieves considerable performance improvements by downloading less file data from the cellular channel and more file data over the P2P coalition network while meeting the file download deadline.

scholarly journals Point-of-Interest Recommender Systems based on Location-Based Social Networks: A Survey from an Experimental Perspective

2022 ◽  
Author(s):  
Pablo Sánchez ◽  
Alejandro Bellogín
Keyword(s):  
Social Networks ◽  
Recommender Systems ◽  
Information Sources ◽  
Learning Approaches ◽  
Performance Improvements ◽  
Point Of Interest ◽  
Real Performance ◽  
Research Questions ◽  
Developing Area ◽  
Location Based Social Networks

Point-of-Interest recommendation is an increasing research and developing area within the widely adopted technologies known as Recommender Systems. Among them, those that exploit information coming from Location-Based Social Networks (LBSNs) are very popular nowadays and could work with different information sources, which pose several challenges and research questions to the community as a whole. We present a systematic review focused on the research done in the last 10 years about this topic. We discuss and categorize the algorithms and evaluation methodologies used in these works and point out the opportunities and challenges that remain open in the field. More specifically, we report the leading recommendation techniques and information sources that have been exploited more often (such as the geographical signal and deep learning approaches) while we also alert about the lack of reproducibility in the field that may hinder real performance improvements.

Success Factors in the Implementation of a Collaborative Technology and Resulting Productivity Improvements in a Small Business

2005 ◽  
pp. 129-150
Author(s):  
Nory B. Jones ◽  
Thomas R. Kochtanek
Keyword(s):  
Decision Making ◽  
Success Factors ◽  
Future Research ◽  
Collaborative Technology ◽  
Performance Improvements ◽  
Effective Implementation ◽  
Potential Success ◽  
Effective Use ◽  
The Impact ◽  
The Relationship

Practitioners and academics often assume that investments in technology will lead to productivity improvements. While the literature provides many examples of performance improvements resulting from adoption of different technologies, there is little evidence demonstrating specific, generalizable factors that contribute to these improvements. Furthermore, investment in technology does not guarantee effective implementation. This qualitative study examined the relationship between four classes of potential success factors on the adoption of a collaborative technology and whether they were related to performance improvements in a small service company. Users of a newly adopted collaborative technology were interviewed to explore which factors contributed to their initial adoption and subsequent effective use of this technology. The results show that several factors were strongly related to adoption and effective implementation. The impact on performance improvements was further explored. Results showed a qualitative link to several performance improvements including timesavings and improved decision-making. These results are discussed in terms of generalizability as well as suggestions for future research.

The environmental product variety and retail rents on central urban shopping areas: A multi-stage spatial data mining method

2020 ◽  
pp. 239980832096660
Author(s):  
Tony Shun-Te Yuo ◽  
Tzuhui Angie Tseng
Keyword(s):  
Spatial Data ◽  
Diversity Index ◽  
Three Dimensional ◽  
Product Variety ◽  
Spatial Data Mining ◽  
The Core ◽  
Point Of Interest ◽  
Number Of Layers ◽  
Multi Stage ◽  
The Relationship

This study examines the relationship between various measures of environmental product variety and retail rents in central urban shopping areas. Using a Geographic Information System (GIS)-based detailed survey database, this research identified 34 layers of environmental product variety in the most representative single-centred shopping areas of the six largest cities in Taiwan. This research extracted layers of product variety and other measures of product variety, such as the number of layers of product variety above each point of interest, the density, the Core/Periphery factor scores, the Shannon entropy index, the Simpson diversity index and the Herfindahl–Hirschman index of each street line buffer area. The proposed method was used to generate three-dimensional maps of the rent gradient and the extracted core and periphery layers of product variety. Thus, a tool was developed for examining the variety features from various angles. The results showed that, in general, the higher the product variety, the higher the rents. Nevertheless, the scores for the core and periphery of the environmental product variety were the dominant determinants; street line buffer areas can only have lower rents if they lacked the correct (i.e. the core layers) environmental product variety, even if they have higher measurements of other variety features.

Moderating effect of environmental supply chain collaboration

2015 ◽  
Vol 45 (9/10) ◽  
pp. 959-978 ◽  
Author(s):  
Yenming J. Chen ◽  
Yenchun Jim Wu ◽  
Tienhua Wu
Keyword(s):  
Survey Methodology ◽  
Supply Chain Collaboration ◽  
Environmental Strategy ◽  
Content Type ◽  
Environmental Commitment ◽  
Performance Improvements ◽  
Significant Performance ◽  
Environment Performance ◽  
The Relationship

Purpose – The purpose of this paper is to explore how corporate environmental strategies, namely, environmental management strategy (EMS) and green product strategy (GPS), affect the competitiveness of a firm. In addition, this study investigates whether the environmental collaboration in supply chains (ECSC), namely, environmental collaboration with suppliers (ECS), and environmental collaboration with customers (ECC) moderate the environment-performance relationship. Design/methodology/approach – Survey methodology and regression modeling are adopted to assess the relationship between corporate environmental strategy and competitive performance of a company, including the moderating effects of ECSC. Findings – Competitiveness is positively affected by EMS and GPS. ECSC moderately affects the links among EMS, GPS, and competitiveness. Regarding the differences between the impacts of ECS and ECC on performance, only ECS acts as a moderator in the enhancement of EMS and GPS. Thus, ECS positively contributes to enhance competitive advantage. In contrast to perceptions, ECC directly improves firm competitiveness. Research limitations/implications – The findings support the understanding that the moderating role of ECSC may explain the conflicting results in environment-performance linkages. In particular, suppliers and customers could impact EMS and GPS in direct or interactive ways, or both, to enhance the performance of a firm. Practical implications – Significant performance improvements are influenced not only by the real environmental commitment of companies to internal green management but also by the positive relations of firms with their external cooperative capabilities in environmental relationships with chain partners. Originality/value – This research is the first to suggest and empirically test the moderating impacts of ECSC on the relationship between corporate environmental strategy and competitiveness.

A Collective and Comparative Study of Various Routing Protocols and the Threats in MANET

2021 ◽  
Vol 12 (1) ◽  
pp. 37-47
Author(s):  
Parthasarathy Ramadass ◽  
Manjula Sankar ◽  
Shanmugapriyan J.
Keyword(s):  
Routing Protocols ◽  
Ad Hoc ◽  
Mobile Ad Hoc Network ◽  
Simulation Analysis ◽  
Network Communication ◽  
Mobile Nodes ◽  
Security Systems ◽  
Security Issues ◽  
Relationship Of ◽  
The Relationship

A collection of mobile nodes deployed with a temporary intention is called mobile ad hoc network (MANET). Every deployed node has the capable of connecting the network communication, and every node has the capable of configuring network communication. There are many routing procedures to discover the proper route from source to destination. The routing protocol helps to channelize the route from one point to other for establishment of the communication. This paper discusses the detailed and the elaborated study of the MANET security issues and the various routing protocols. Moreover, it describes about the OSI model with the relationship of security systems. The elaborated and the detailed approach of the various protocol helps to build a progressive idea of the MANET security. Various issues and the overcomes help to find the loopholes of the threats, and it clearly explains the analysis of the MANET efficiency. The simulation analysis helps to know the comparison analysis of various protocols.

Decentralized Intelligent Search of Tourist Routes Based on Check-In Data

2021 ◽  
Vol 12 (3) ◽  
pp. 1-16
Author(s):  
Jie Su ◽  
Jun Li
Keyword(s):  
Search Strategy ◽  
Search Efficiency ◽  
Access Route ◽  
Layer Transfer ◽  
Intelligent Search ◽  
Point Of Interest ◽  
Branch And Bound Search ◽  
Relationship Of ◽  
The Relationship ◽  
Route Search

The location social network generates a large amount of data; these dada reflect the user's preferences and the popularity of the route, and a new model is provided for travel route search. Based on this demand, a problem of local distributed travel route search is proposed for group users. In this problem, the personal preferences of group users are combined, and an access route is found with partial POI (point of interest) and the largest group profit. The check-in data are used to generate a POI transfer relationship diagram based on the user's transfer between POIs, and route search is performed on the relationship diagram. In order to improve the search efficiency, a two-layer transfer relationship diagram is designed according to the popularity and transfer relationship of POI, the POI is generalized, and a hierarchical query is realized. A branch and bound search strategy optimization algorithm is designed, and the control relationship between nodes is used for pruning; the search efficiency of the algorithm is further improved.

Uncovering curvilinearity in the organizational tenure-job performance relationship

2017 ◽  
Vol 46 (8) ◽  
pp. 1552-1570 ◽  
Author(s):  
Nishant Uppal
Keyword(s):  
Job Performance ◽  
Job Characteristics ◽  
Curvilinear Relationship ◽  
Business Organizations ◽  
Continuance Commitment ◽  
Content Type ◽  
Moderation Effects ◽  
Performance Improvements ◽  
Organizational Tenure ◽  
The Relationship

Purpose The purpose of this paper is to posit a curvilinear relationship between organizational tenure and various facets of job performance. So far, theoretical explanations of such curvilinearity have been inconclusive and ambiguous. The current study draws from literature on organizational commitment to present an additional psychoeconomic explanation for curvilinearity. Further, it brings together job design, job stage, and conservation resource models to investigate moderation effects of motivational job characteristics on the organizational tenure-job performance relationship. Design/methodology/approach It is a longitudinal field study at two time periods using a sample of employees (n=679) in 19 job profiles from 13 different public sector organizations. Findings The current study found a mediated curvilinear relationship between organizational tenure and job performance from continuance commitment. The data show moderation effects of motivational job characteristics on the mediated curvilinear organizational tenure-job performance relationship. Originality/value Prior research based on industrial and business organizations provides substantial evidence to expect a curvilinear relationship between organizational tenure and job performance. That is, after an employee has spent a considerable amount of time in an organization and learned virtually all aspects of the job, further organizational tenure may cease to produce additional job performance improvements. However, scholars predicting curvilinear relationship have focused predominately on empirical verification with inconclusive and ambiguous theoretical explications. Therefore, the aim of the present study is twofold. First, it attempts to describe the ambiguous relationship between organizational tenure and job performance by examining the mechanism behind curvilinearity. Second, it examines motivational job characteristics as possible moderators that may affect the relationship.

scholarly journals Examination of the relationship between organizational culture and performance

2017 ◽  
Vol 8 (1) ◽  
pp. 99-105 ◽  
Author(s):  
A. Matkó ◽  
T. Takács
Keyword(s):  
Organizational Culture ◽  
Shared Values ◽  
Performance Improvements ◽  
Significant Performance ◽  
And Performance ◽  
Level Of Motivation ◽  
The Relationship

Nowadays other aspects of motivation are also displayed, including in relation to organizational culture. Visible and invisible elements of organizational culture have an impact on performance of workers. Shared values and knowledge by employees are resulting a strong organizational culture. The better the organizational culture, the higher level of motivation is manifested among employees. According to the observations, if in an organization there is a strong organizational culture with gratitude and recognition towards employees, this will cause the strengthening of motivation and significant performance improvements. The objective our study is examining the relationship between organizational culture and motivation and how dimensions of organizational culture motivate employees of the organization.

scholarly journals Six Sigma and organisational ambidexterity: a systematic review and conceptual framework

2017 ◽  
Vol 8 (4) ◽  
pp. 436-456 ◽  
Author(s):  
Cristina Alcaide-Muñoz ◽  
Leopoldo J. Gutierrez-Gutierrez
Keyword(s):  
Quality Management ◽  
Six Sigma ◽  
Management Practices ◽  
Social Science Citation Index ◽  
Research Management ◽  
Exploration And Exploitation ◽  
Content Type ◽  
Performance Improvements ◽  
Six Sigma Methodology ◽  
The Relationship

Purpose The aim of this paper is to analyse the relationship between Six Sigma methodology and organisational ambidexterity (exploitation and exploration orientations). For this purpose, this study describes how Six Sigma practices may enhance both orientations simultaneously, contributing to organisational ambidexterity and performance improvements. Design/methodology/approach A systematic literature review was adopted as the research methodology. The authors analysed 512 publications in Social Science Citation Index journals in fields such as management, business, operation research management science, planning development, behavioural sciences, interdisciplinary social sciences and applied psychology from 1987 to 2016, as the first development and adoption of Six Sigma was in 1987 by Motorola. Findings This analysis describes how Six Sigma emphasises not only useful practices for exploitation orientation, such as customer input, design for manufacturability or improvement and control of processes, but also explorative practices, such as discovery, novelty or innovation. Consequently, an adequate combination of all these practices may enhance organisational ambidexterity and organisational success. Research limitations/implications This study relies exclusively on previously published literature that fulfilled the selection criteria described in the search methodology. Further empirical research is necessary to test the propositions included in this paper. Practical implications This study has important implications for academics, practitioners and employers, as it furnishes new theoretical insights to the scarce literature that studies the relationship between quality management practices and organisational ambidexterity. The authors provide a better understanding of Six Sigma philosophy and some fresh and new insight on how Six Sigma practices may help organisation develop distinctive competitive competences by its influence over exploration and exploitation orientations (ambidexterity). Therefore, it might be of interest to those practitioners interested in achieving a successful competitive position and discover emerging business opportunities, as it may provide some guidance on the important implication of Six Sigma practices over exploration and exploitation orientations. Originality/value This study provides new insights into the non-existent literature about Six Sigma and organisational ambidexterity and to the scarce literature about quality management and ambidexterity. Propositions on how Six Sigma practices benefit organisational ambidexterity are also suggested.

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