scholarly journals Quantifying Topological Flexibility of Active Distribution Networks Based on Community Detection

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4786
Author(s):  
Huizi Gu ◽  
Xiaodong Chu
Keyword(s):  
Clustering Algorithm ◽  
Distribution Networks ◽  
Operating Conditions ◽  
Quantification Method ◽  
Study Results ◽  
Affinity Propagation Algorithm ◽  
Spectral Clustering Algorithm ◽  
Active Distribution Networks

Active distribution networks (ADNs) provide a flexible platform to integrate various distributed generation sources, among which the intermittent renewable sources impose high operating uncertainty. Topological flexibility of ADNs should be exploited to counter the stochastic operating conditions by modifying the topologies of ADNs. Quantifying the topological flexibility is a vital step to utilize it, which is lacking in previous studies. A quantification method is proposed to measure the topological flexibility of ADNs in this paper. First, the community structures of ADNs are detected to achieve spatial partitions of the networks. Second, an improved spectral clustering algorithm is employed to significantly reduce the dimensionality of the partition space, in which the ADNs are further partitioned using the affinity propagation algorithm. Finally, a topological flexibility metric is defined based on the guiding role of sectionalizing and tie switches within and between communities. The proposed topological flexibility quantification method is a superb approach to the utilization of flexibility resources in distribution networks. Case study results of test ADNs demonstrate the effectiveness and efficiency of the proposed quantification method.

scholarly journals The Role of Sufistic-Based Kiai Leadership in Developing the Character of Santri in the Pesantren

2021 ◽  
Vol 13 (3) ◽  
pp. 1705-1714
Author(s):  
Chusnul Muali ◽  
Moh Rofiki ◽  
Hasan Baharun ◽  
Zamroni Zamroni ◽  
Lukman Sholeh
Keyword(s):  
Essential Role ◽  
Vital Role ◽  
Qualitative Approach ◽  
Reduction Techniques ◽  
Study Results ◽  
Technological Developments ◽  
The Subject ◽  
Common Understanding

This study aims to describe Sufistic-based Kiai leadership's role in shaping Santri character at the Pesantren Nurul Jadid Paiton Probolinggo. This research is a case study qualitative approach, with Kiai as the subject. We collected data using interview, documentation, and observation techniques, then analyzed using reduction techniques, presenting data, and drawing conclusions. The results showed that the Sufistic-based Kiai's leadership had an essential role in fostering the character of the Santri. The study results indicate that the Sufistic-based Kiai leadership has a vital role in promoting the surface of the Santri. Kiai is a person who gives influence in building character with Uswah (Modelling). This study also found that the factors that influence low morale are that Santri has a common understanding of the latest technological developments. In Sufistic-based leadership, there are four things that a leader must possess: 1) The Tawasuth, 2) The nature of I'tidal, 3) The Tawazun, and 4) The Tasamuh.

Agile Teams in Digital Media

2020 ◽  
pp. 340-359
Author(s):  
Rachel Ralph ◽  
Patrick Pennefather
Keyword(s):  
Digital Media ◽  
Reflective Practitioner ◽  
Comparative Case Study ◽  
Future Research ◽  
Master's Program ◽  
Study Results ◽  
Agile Practices ◽  
Media Environments

As we move towards the third decade of the 21st century, the development of emerging technologies continues to grow alongside innovative practices in digital media environments. This chapter presents a comparative case study of two teams (Team A and Team B) in a professional master's program during a 13-week, project-based course. Based on the role of documentation and the reflective practitioner, team blogs representing learner experiences of Agile practices were analyzed. This case study chapter focused on one blog post of a mid-term release retrospective. The results of this case study are framed around Derby and Larson's (2006) Agile retrospectives framework, including: set the stage, gather data, generating insights, deciding what to do, and closing the retrospective. The case study results suggest the need for public documentation of retrospectives and how this can be challenging with non-disclosure agreements. Also, the authors identify the importance of being a reflective practitioner. Future research on educational and professional practices needs to be explored.

State Estimation of Active Distribution Networks

2020 ◽  
pp. 270-308
Author(s):  
Razan Al Rhia ◽  
Haithm Daghrour
Keyword(s):  
State Estimation ◽  
Distribution System ◽  
Distribution Systems ◽  
Operating Performance ◽  
Distribution Networks ◽  
Dynamic State ◽  
State Estimator ◽  
Static State ◽  
Active Distribution Networks

Monitoring and controlling the electrical distribution system for real time is becoming very important to improve its operating performance after transition to active distribution systems. So, many sensors are needed to monitor all parts in the systems. But if sensors are installed at all buses, investment cost becomes huge. To reduce the number of sensors, state estimation approach can be used to estimate the voltage of buses, which do not have sensors. State Estimation (SE) algorithms are broadly classified into Static State Estimator (SSE) and Dynamic State Estimator (DSE). This chapter classifies most algorithms used in active distribution networks, also State estimation in unbalanced distribution systems, and Role of PMU in Distribution System State Estimation.

Architectural Modeling for Managing Risks in Forming an Alliance

2019 ◽  
Vol 04 (03) ◽  
pp. 1950006 ◽  
Author(s):  
Matthew Cook ◽  
John P. T. Mo
Keyword(s):  
Distribution Networks ◽  
Business Environment ◽  
Operating Conditions ◽  
Financial Risks ◽  
Supply And Distribution ◽  
Complex Engineering ◽  
The Individual ◽  
Project Lifecycle ◽  
Engineering Projects

Many large and highly complex engineering projects present enormous technical and financial risks to organizations. This is especially true in the defence industry where budgets can potentially run into billions and the project lifecycle may extend over many years. In frequent cases, such projects are too much for a single organization to undertake. One option that is becoming ubiquitous across contemporary defence projects is to spread the risk by forming an alliance between several organizations. Unfortunately, forming an alliance between potentially competing organizations brings its own set of challenges and risks. The operating conditions of the business environment are characterized by frequent changes in products, services, processes, organizations, markets, supply and distribution networks. The partners need to work together as an entity to achieve a goal but the relationships within the alliance are often disrupted by the established practices, culture and motivation of the individual companies. This paper starts by examining how risks can essentially multiply when an alliance is formed and what potential impacts these risks have on project success. A novel 3PE method for modeling the structure of an alliance with the three elements being product, people, process, and their interactions is proposed within an alliance environment. This methodology is then used to calculate the increase in interactions between the 3Ps with the introduction of more organizations to the alliance. By examining each of the elements and their interactions, risks are identified, and the key drivers are exposed. Finally, a case study is presented that illustrates how the architectural model can be used to estimate the probability of failure of the alliance.

scholarly journals A Quantitative Study on the Requirement for Additional Inertia in the European Power System until 2050 and the Potential Role of Wind Power

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2309 ◽  
Author(s):  
Christos Agathokleous ◽  
Jimmy Ehnberg
Keyword(s):  
Power System ◽  
Wind Power ◽  
Power Plants ◽  
Worst Case ◽  
Study Results ◽  
The Future ◽  
Alternative Sources ◽  
The Eu

A significant amount of conventional power plants in the European power system is anticipated to be replaced by solar and wind power in the future. This may require alternative sources for inertia support. The purpose of the paper is to learn about the consequences on the frequency deviation after a fault in the European power system when more wind and solar are introduced and when wind is considered as a possible provider of inertia. This study quantifies the expected maximum requirement for additional inertia in the future European power system up to 2050. Furthermore, we investigated the possibility of wind power to meet this additional need by providing emulated inertia. The European power system of the EU-28 countries has been clustered to the five synchronous grids, UCTE, Nordic, UK, Baltic and Irish. The future European energy mix is simulated considering twelve different scenarios. Production units are dispatched according to their expected environmental impacts, which closely follow the minimum natural contribution of inertia, in descending order. The available capacity for all the types of production is considered the same as the installed. For all the simulated scenarios the worst case is examined, which means that a sudden disconnection of the largest production unit of the dispatched types is considered. Case study results reveal that, in most cases, additional inertia will be required but wind power may fully cover this need for up to 84% of all simulated horizons among all the scenarios on the UCTE grid, and for up to 98%, 86%, 99% and 86% on the Nordic, UK, Baltic and Irish grids, respectively.

scholarly journals PENGELOLAAN MODAL SOSIAL DALAM MENINGKATKAN KESEJAHTERAAN MASYARAKAT (STUDI KASUS BAITUL MAAL HIDAYATULLAH SURABAYA)

2020 ◽  
Vol 7 (5) ◽  
pp. 842
Author(s):  
Nur Halimah ◽  
Irham Zaki
Keyword(s):  
Social Capital ◽  
Data Collection ◽  
Direct Observation ◽  
Qualitative Approach ◽  
Study Strategy ◽  
Explanatory Analysis ◽  
Analysis Technique ◽  
Study Results

This study aimed to describe and analyze the role of social capital, as seen from the interrelation of networks, norms, and beliefs in improving the welfare of the community under the indicators of Maqashid Syariah. This study employed a qualitative approach with a case study strategy. Besides, this study has an analysis unit in the form of social capital and improvement of the welfare of the community who received scholarship assistance from Baitul Maal Hidayatullah of Surabaya. Also, data collection was carried out by interview and direct observation of the research object. The analysis technique utilized in this study was an explanatory analysis technique by explaining the results of interviews and direct observation. The study results reveal that social capital with norms, networks, and trust indicators play a role in improving the welfare of the community seen from the aspects of Maqashid Syariah.Keywords: Social capital, Welfare, and Maqashid Syariah

The role of finance in the sales and operations planning process: a multiple case study

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Marcelo Seeling ◽  
Tobias Kreuter ◽  
Luiz Felipe Scavarda ◽  
Antonio Márcio Tavares Thomé ◽  
Bernd Hellingrath
Keyword(s):  
Latin American ◽  
Multiple Case Study ◽  
Evidence Based ◽  
Operations Planning ◽  
Content Type ◽  
Study Results ◽  
Multiple Case ◽  
Pharmaceutical Industries

PurposeThis paper aims to offer evidence-based findings on the under-researched role of finance in the sales and operations planning (S&OP) process, aiming to guide academics and practitioners towards successful S&OP implementations.Design/methodology/approachThe research builds upon a multiple case study, embracing five Latin American subsidiaries of four global manufacturing corporations from the consumer goods, chemical and pharmaceutical industries. Following an exploratory approach, the case study results are analysed in within- and cross-case analyses.FindingsThe research findings are synthesised into a framework, demonstrating relevant benefits from the engagement of finance along the S&OP process and the implications of its interactions with traditional S&OP functions as sales, marketing and operations. The paper shows how finance adds value in supporting the process, enabling decisions on costs, margins, capital expenditures and return on investments. Finance strengthens S&OP when assessing demand- and supply-related risks and facilitates comparing the functional business areas' plans to budget. While finance participation is highlighted as necessary for supporting successful S&OP implementations, it also receives valuable inputs in return, characterising a two-way communication role that benefits the entire organisation.Originality/valueThis is the first research paper focusing on empirically exploring the role of finance within S&OP, going beyond initial insights from practice and academia. It provides practitioners and scholars with an in-depth, evidence-based view of finance's integration along the S&OP process.

scholarly journals The Role of Continuous Education Programs Organized by Saudi Universities in Literacy—A Case Study of King Saud University

2017 ◽  
Vol 10 (4) ◽  
pp. 187
Author(s):  
Haya Saad Abdulla Al Rawaf ◽  
Azza Khalil Abdel Fattah ◽  
Fadia Yousif Abdel Megeid ◽  
Rania Mohammed Aziz Nazmy ◽  
Sarah Nasser Alarifi ◽  
...  
Keyword(s):  
The Other ◽  
Health Issues ◽  
Education Programs ◽  
Continuous Education ◽  
King Saud University ◽  
Study Results ◽  
Two Samples ◽  
The University

This study aims at highlighting the role of Continuous Education Programs at the Saudi Universities in Religious, Social, and Health Literacy; King Saud University was taken as an example. To achieve the goals of the study two questionnaires were distributed among two samples from King Saud University; (101) of students, and (9) of continuous education centers’ directors. Results showed that continuous education programs presented in religious awareness development do not contribute sufficiently in developing them. However; continuous education programs have favorable role in community’s social culturing. Also, continuous education programs contribute, at medium degree, in community’s health culturing. On the other hand; people in charge agree that the investment revenue in financing continuous education programs is minor as well as financing offered by the University. In light of the study results, the researchers recommended paying more attention to present more continuous education programs of concern as to individuals’ needs through cooperation with the research center in the University to perform survey studies targeted to define the individuals’ needs in terms of religious, social and health issues.

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