Allocating nodes to hubs for minimizing the hubs processing resources: A case study

2019 ◽  
Vol 53 (3) ◽  
pp. 807-827
Author(s):  
Ali Balma ◽  
Mehdi Mrad
Keyword(s):  
Telecommunication Network ◽  
Real Life ◽  
Optimal Solutions ◽  
Total Flow ◽  
Nonlinear Formulation ◽  
Large Size ◽  
Processing Resources ◽  
Reformulation Linearization

This paper addresses the problem of allocating the terminal nodes to the hub nodes in a telecommunication network. Since the flow processing induces some undesirable delay, the objective is to minimize the total flow processed by the hubs. This study focuses on a real life network of the tunisian operator Tunisie Telecom whose operations managers are concerned by the quality of service. We provide three compact formulations that give optimal solutions for networks of large size. In particular, the last two are obtained by applying the Reformulation-Linearization Technique to a nonlinear formulation of the problem. The latter formulation derived within this approach is the most computationally effective, as pointed out by the computational experiments conducted on the real life network of Tunisie Telecom with 110 nodes and 5 hubs. Finally, we discuss and compare between the single allocation and double allocation configurations.

Exploring Shared Work Values and Work Collaboration With a Network Approach

2021 ◽  
pp. 43-58
Author(s):  
Aizhan Tursunbayeva ◽  
Stefano Di Lauro ◽  
Gilda Antonelli
Keyword(s):  
Network Analysis ◽  
Work Values ◽  
Real Life ◽  
Shared Values ◽  
Analysis Approach ◽  
Organizational Leaders ◽  
Organizational Network ◽  
Substantial Interest

A real-life case study presented in this chapter reports on how organizational network analysis approach was used in a medium-sized Italian company with circa 100 employees to examine how the company employees were connected by shared values at work, what these values are, and whether and how their value connectedness impacted the quality of their collaboration. The findings indicate that there was a positive correlation between shared work values and work collaboration, present benchmarks for network parameters, as well as propose macro-categories of work values. To the best of the authors' knowledge, this is the first study to use the network-analysis approach to explore shared values and employee collaboration at work. The chapter should be of substantial interest not only to academic scholars but also to organizational leaders and HR practitioners.

scholarly journals Location Matters! Exploring Brownfields Regeneration in a Spatial Context (A Case Study of the South Moravian Region, Czech Republic)

2013 ◽  
Vol 21 (2) ◽  
pp. 5-19 ◽  
Author(s):  
Bohumil Frantál ◽  
Josef Kunc ◽  
Eva Nováková ◽  
Petr Klusáček ◽  
Stanislav Martinát ◽  
...  
Keyword(s):  
Czech Republic ◽  
Local Development ◽  
The South ◽  
Development Potential ◽  
Large Size ◽  
Specific Factors ◽  
Functional Distribution ◽  
Using Data

Abstract In this paper the authors attempt to answer the question of which location and site-specific factors have a decisive influence on the successful regeneration of brownfields. Using data from the South Moravian Region (Czech Republic), we analyze the spatial and functional distribution of brownfields, and test the correlation between the development potential of municipalities and the distribution of the brownfields that have already been regenerated. We then compare the structure and characteristics of existing and regenerated brownfields to identify significant drivers and barriers in the regeneration process. The findings indicate that regenerated brownfields are more likely located in municipalities with a higher local development potential (represented by the rate of local business activities, spatial peripherality - proximity to the regional centre and the main road network, and the quality of local infrastructure). It is also demonstrated that the large size of brownfields, their previous industrial use and the existence of contamination are not determinative barriers for regeneration if the brownfields are located in attractive areas and their ownership relations are not complicated.

Meta-Heuristic Structure for Multiobjective Optimization Case Study

2014 ◽  
pp. 38-58
Author(s):  
T. Ganesan ◽  
I. Elamvazuthi ◽  
K. Z. KuShaari ◽  
P. Vasant
Keyword(s):  
Performance Metrics ◽  
Heuristic Algorithms ◽  
Weighted Sum ◽  
Optimal Solutions ◽  
Green Sand ◽  
Weighted Sum Method ◽  
Real World Problem ◽  
Green Sand Mould System

In engineering optimization, one often encounters scenarios that are multiobjective (MO) where each of the objectives covers different aspects of the problem. It is hence critical for the engineer to have multiple solution choices before selecting of the best solution. In this chapter, an approach that merges meta-heuristic algorithms with the weighted sum method is introduced. Analysis on the solution set produced by these algorithms is carried out using performance metrics. By these procedures, a novel chaos-based metaheuristic algorithm, the Chaotic Particle Swarm (Ch-PSO) is developed. This method is then used generate highly diverse and optimal solutions to the green sand mould system which is a real-world problem. Some comparative analyses are then carried out with the algorithms developed and employed in this work. Analysis on the performance as well as the quality of the solutions produced by the algorithms is presented in this chapter.

An Application of an Intelligent Data Warehouse for Modelling Spatiotemporal Objects

2020 ◽  
Vol 1 (1) ◽  
pp. 36-57
Author(s):  
Georgia Garani ◽  
Nunziato Cassavia ◽  
Ilias K. Savvas
Keyword(s):  
Data Analysis ◽  
Data Warehouse ◽  
Real Life ◽  
Weather Conditions ◽  
Quality Of Data ◽  
History Of ◽  
Complete History ◽  
Over Time

Data warehouse (DW) systems provide the best solution for intelligent data analysis and decision-making. Changes applied to data gradually in real life have to be projected to the DW. Slowly changing dimension (SCD) refers to the potential volatility of DW dimension members. The treatment of SCDs has a significant impact over the quality of data analysis. A new SCD type, Type N, is proposed in this research paper, which encapsulates volatile data into historical clusters. Type N preserves complete history of changes, additional tables, columns, and rows are not required, extra join operations are omitted, and surrogate keys are avoided. Type N is implemented and compared to other SCD types. Good candidates for practicing SCDs are spatiotemporal objects (i.e., objects whose shape or geometry evolves slowly over time). The case study used and implemented in this paper concerns shape-shifting constructions (i.e., buildings that respond to changing weather conditions or the way people use them). The results demonstrate the correctness and effectiveness of the proposed SCD Type N.

Quality Evaluation of Volunteered Geographic Information

Crowdsourcing ◽  
2019 ◽  
pp. 1173-1201
Author(s):  
Hongyu Zhang ◽  
Jacek Malczewski
Keyword(s):  
Quality Evaluation ◽  
Evaluation Process ◽  
Volunteered Geographic Information ◽  
Geographic Information ◽  
Positional Accuracy ◽  
Product Selection ◽  
Geographic Space ◽  
Large Size

A large amount of crowd-sourced geospatial data have been created in recent years due to the interactivity of Web 2.0 and the availability of Global Positioning System (GPS). This geo-information is typically referred to as volunteered geographic information (VGI). OpenStreetMap (OSM) is a popular VGI platform that allows users to create or edit maps using GPS-enabled devices or aerial imageries. The issue of quality of geo-information generated by OSM has become a trending research topic because of the large size of the dataset and the inapplicability of Linus' Law in a geospatial context. This chapter systematically reviews the quality evaluation process of OSM, and demonstrates a case study of London, Canada for the assessment of completeness, positional accuracy and attribute accuracy. The findings of the quality evaluation can potentially serve as a guide of cartographic product selection and provide a better understanding of the development of OSM quality over geographic space and time.

Quality Evaluation of Volunteered Geographic Information

2017 ◽  
pp. 19-46 ◽  
Author(s):  
Hongyu Zhang ◽  
Jacek Malczewski
Keyword(s):  
Quality Evaluation ◽  
Evaluation Process ◽  
Volunteered Geographic Information ◽  
Geographic Information ◽  
Positional Accuracy ◽  
Product Selection ◽  
Geographic Space ◽  
Large Size

A large amount of crowd-sourced geospatial data have been created in recent years due to the interactivity of Web 2.0 and the availability of Global Positioning System (GPS). This geo-information is typically referred to as volunteered geographic information (VGI). OpenStreetMap (OSM) is a popular VGI platform that allows users to create or edit maps using GPS-enabled devices or aerial imageries. The issue of quality of geo-information generated by OSM has become a trending research topic because of the large size of the dataset and the inapplicability of Linus' Law in a geospatial context. This chapter systematically reviews the quality evaluation process of OSM, and demonstrates a case study of London, Canada for the assessment of completeness, positional accuracy and attribute accuracy. The findings of the quality evaluation can potentially serve as a guide of cartographic product selection and provide a better understanding of the development of OSM quality over geographic space and time.

Launch and closure of an Indian cement plant

2011 ◽  
Vol 1 (1) ◽  
pp. 1-11
Author(s):  
Margie Parikh
Keyword(s):  
Decision Making ◽  
Real Life ◽  
Subject Area ◽  
Content Type ◽  
Anchoring Bias ◽  
New Business ◽  
Subject Areas ◽  
Senior Officers

Subject area Decision making, behavioural decision making, heuristics, optimistic bias, confirmatory bias, anchoring bias, ready mix cement (RMC) business in India. Study level/applicability Post graduate management course, executive training program in the subject areas. Case overview Arco is a Projects and Infrastructure-sector company. Some of its key officials, believing that entering the RMC can be beneficial for Arco, plan entry into the manufacturing of RMC but order a feasibility report. The report confirms the hunch and Arco starts the business under the aegis of its associate, EG Ltd (EGL) which is into equipment rental business. At this time a new dimension of reality opens up but the senior officers refuse to accept a revised proposal which is adjusted to the new realities. After a few months and some losses, EGL closes down the RMC plant and rents it out. Expected learning outcomes This case study is developed with a purpose to provide a basis to discuss how decisions are taken in real life and how various behavioural elements affect the quality of decisions that affect not only the decision makers but many others and their organizations. Focus is especially on prejudice, heuristics and bias that creep into important organizational decisions such as venturing into new business. Supplementary materials Teaching note.

scholarly journals Current challenges and innovative approaches in the development of peripheral regions in Bulgaria: The case of Ivaylovgrad municipality

Spatium ◽  
2010 ◽  
pp. 1-8
Author(s):  
Elena Dimitrova ◽  
Angel Burov
Keyword(s):  
Real Life ◽  
Cultural Patterns ◽  
Critical View ◽  
Case Study Analysis ◽  
Border Areas ◽  
Native Place ◽  
Innovative Approaches ◽  
Peripheral Regions

The paper approaches territorial cohesion in SEE from the perspective of social equity with regard to the opportunity to choose to live in one?s native place without compromising the quality of life. It is interested in border areas - both physical and virtual; in real life situations as meeting points of theories and policies influencing human lives; and in the emerging challenges there that often make us question once and again our concepts and actions as experts. Based on the Bulgarian case-study analysis, the authors discuss the effectiveness and current challenges of real-life implementation of EU and national policies aimed at sustainable development of peripheral regions. The rural peripheral municipality of Ivaylovgrad is an indicative case study for the ongoing processes in the peripheral regions of Bulgaria and the efforts to overcome a continuing loss of working places, services, markets and further isolation from the rest of the country since the early 1990s. The paper presents a critical view of initiatives and projects undertaken by interest and local groups in the period 2006-2010. Possible innovative approaches for regional revival are considered and conclusions are drawn about the importance of creating development strategies sensitive to the existing and emerging socio-cultural patterns.

scholarly journals A Real-Life Context on Adult Survivors’ Perceived Quality of Life, Spirituality, and Resiliency

2020 ◽  
Vol 3 (1) ◽  
pp. 21-34
Author(s):  
Rogen Ferdinand E. Alcantara
Keyword(s):  
Quality Of Life ◽  
Real Life ◽  
Adult Survivors ◽  
Well Being ◽  
The Real ◽  
Perceived Quality Of Life ◽  
Life Context ◽  
Spiritual Struggles

This study aims to determine the real-life context on quality of life, spirituality, and resiliency among natural disaster adult survivors in Negros Oriental and Bohol.  The case study method was utilized to investigate the real-life experiences of seven (7) adult survivors, ages 20 and older, who joined in the Silliman University Continuing Calamity Response Program.  The narratives revealed a commonality of opinions on their quality of life. General sentiment on the available resources may be present but was inadequate. However, despite their ominous view on the quality of life, the majority of the participants chose to move on. Moreover, most participants indicate experiencing spiritual struggles, but these struggles sustained them. Momentarily, the love and support from their family and the community have allowed them to strive and make life adjustments. With this, balanced and holistic recovery programs should be implemented to obtain optimal well-being, spiritual empowerment, and positive resiliency.

scholarly journals Identification of Technical Solutions to Improve Primary Education: A Real-Life Application

2020 ◽  
Vol 6 (2) ◽  
pp. 821-828
Author(s):  
Zafar Iqbal ◽  
Lubna Shoukat ◽  
Muhammad Waheed
Keyword(s):  
Primary School ◽  
Primary Education ◽  
Quality Function Deployment ◽  
Real Life ◽  
School Level ◽  
Quality Of Education ◽  
Technical Solution ◽  
Technical Solutions

Quality Function Deployment (QFD) is a meticulous procedure of translating consumers’ needs and demands into appropriate solutions. The application of QFD has been expanded, leaving no definite boundary for its potential use, to almost every field of life. It helps   identify not only the needs and demands of a certain matter but also helps find out the solutions of those matters along with assigning them the priorities. Primary education enjoys the fundamental role and provides the foundation for further upbringing of children with respect to their educational, social, intellectual, cultural, emotional and physical proficiencies. This research article is aimed at exploring the Voices of Parents, (VOPs) (parent’s needs and demands) regarding their children’s educational requirements at primary school level. This objective is achieved by identifying significant VOPs and then converting these into Technical Solution for better and high quality of education.  With the help of QFD methodology, a real-life case study has been conducted to identify VOPS their technical solutions, then the order of these technical solutions is determined and, finally, suggestions are made about which technical solution is the most important and which one is the least. The findings provide a guide line for primary school stakeholder to identify problems and their solutions for better standard and quality of education.

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