scholarly journals Managing new PV plant connection to available grids to stay within standard limits with a case study

2021 ◽  
Vol 4 (2) ◽  
Author(s):  
Ehsan Najafi ◽  
Amin Mirzaei ◽  
Mahdi Mahdi Rezvanyvardom ◽  
Mahdi Zolfaghar
Keyword(s):  
General Algorithm ◽  
Solar Irradiation ◽  
Constant Amount ◽  
Distinct Part ◽  
Electric Grids ◽  
The World ◽  
Simulation Results ◽  
Selection Of

PV plants are increasing all over the world and they are becoming a distinct part of electric grids. Due to abundance of solar irradiation and almost constant amount of it in certain geographical latitudes, selection of proper capacity of PV plants depends mostly on available places for the site. in this paper, important measures for safe connection of a PV plant in terms of voltage requirements are addressed and several guidelines are introduced for this purpose. In addition, simulation results are included to prove some of the mentioned suggestions. a general algorithm is finally proposed to show the directions for safe connection of PV plants.

scholarly journals Funkcjonowanie administracji publicznej w sytuacji kryzysu spowodowanego czynnikami zewnętrznymi – studium przypadku COVID-19

2020 ◽  
Vol 6 ◽  
pp. 267-281
Author(s):  
Paulina Szyja
Keyword(s):  
Public Administration ◽  
Human Resource ◽  
Customer Service ◽  
Economic Life ◽  
External Factors ◽  
Good Practices ◽  
The World ◽  
Economic Slowdown ◽  
Selection Of

The Functioning of Public Administration in a Crisis Situation Caused by External Factors: a COVID 19 Case Study The Sars-CoV-2 coronavirus pandemic has caused major changes to the functioning of countries and their communities around the world. We observe the consequences of the spread of a disease which knows no boundaries. Experts talk and write about the crisis, the effects of which affect various spheres of socio-economic life. Governments of many countries, with the support of public administration, have taken a number of activities related to ensuring the safety of citizens, but also the continuity of the state’s functioning and reducing the effects of a possible economic slowdown. The goal of the paper is to analyse how the Sars-CoV-2 coronavirus has influenced and still influences public administration, taking into account a wide selection of activities, good practices in the areas of human resource management, customer service, as well as communication between national authorities and citizens.

scholarly journals Verso il restauro

2013 ◽  
Author(s):  
Maurizio De Vita
Keyword(s):  
Final Stage ◽  
University Education ◽  
University Faculty ◽  
The World ◽  
Methods And Techniques ◽  
Specific Discipline ◽  
The University ◽  
The Relationship ◽  
Selection Of

The book brings together critical considerations and experiences linked to the work of the author, lecturer in restoration at the Florence University Faculty of Architecture, as supervisor of degree theses on restoration. The reflections concern teaching Restoration as a subject, the conditions within which the knowledge and culture of restoration can ripen within our universities and the most recent problems encountered by both the discipline and restoration projects. In the first part of the publication, these aspects are set out in broad and more precisely conceptual and methodological terms in chapters and themed paragraphs which also act as a guide to drawing up degree theses on restoration, as well as a contributing to the didactics and efficiency of the specific discipline. This is followed by a selection of degree theses on restoration discussed in recent years which show the route from the principles, general problems and intervention criteria for every case study to drawing up a project. They are projects that deal with analysis methods and techniques, surveys, specialist restorations, regeneration, and the relationship between old and new. In short, the projects are what gave the final stage in the university education meaning and substance, also in order to acquire fundamental keys to restoration culture and activities in the world after university.

An Object-Oriented Architecture for the Simulation of Networks of Cargo Terminal Operations

2005 ◽  
Vol 2 (2) ◽  
pp. 101-116 ◽  
Author(s):  
Reejo Mathew ◽  
James F. Leathrum ◽  
Saurav Mazumdar ◽  
Taylor Frith ◽  
Joseph Joines
Keyword(s):  
Object Oriented ◽  
Viable Alternative ◽  
The World ◽  
Nodal Model ◽  
Physical Processing ◽  
Simulation Results ◽  
Terminal Operations

A new object-oriented architecture to simulate a network of cargo terminals is presented. The architecture simulates the complete flow of military cargo at an entity level, from multiple U.S.-based installations to a set of destinations within a theater of operations located anywhere in the world. The architecture deals with resource and infrastructure allocations and competition within each terminal in the network, as well as between the terminals, to identify conflicts that may arise. The architecture is a hierarchical, nodal model moving individual pieces of cargo through a network of cargo terminals, and within an individual cargo terminal through a network of physical processing areas. The architecture is capable of simulating cargo terminals around the world under various scenario conditions. It is impractical and expensive to conduct actual exercises to study the efficiency of a deployment. Simulating this process provides a viable alternative for testing these strategies and for evaluating technologies. It also enables an analysis of the simulation results for improved efficiency and throughput within the confines of resources and infrastructure availability. The new architecture is described as well as an example case study to demonstrate the capabilities of the architecture. The architecture focuses on resources and infrastructure within a cargo terminal, and on transportation resources between cargo terminals.

scholarly journals The Evolutionary Equilibrium of Block Withholding Attack

2021 ◽  
Vol 9 (3) ◽  
pp. 266-279
Author(s):  
Yukun Cheng ◽  
Zhiqi Xu ◽  
Shuangliang Yao
Keyword(s):  
Evolutionary Game ◽  
Dynamic Equations ◽  
Game Model ◽  
Replicator Dynamic ◽  
The World ◽  
Stable Solutions ◽  
Simulation Results ◽  
The Impact ◽  
Theoretical Results ◽  
Selection Of

Abstract Bitcoin is the most famous and the most used cryptocurrency in the world, such that it has received extreme popularity in recent years. However the Bitcoin system is accompanied by different attacks, including the block withholding (BWH) attack. When a miner plays the BWH attack, it will withhold all the blocks newly discovered in the attack pool, damaging the honest miners’ right to obtain the fair reward. In this paper, we consider a setting in which two miners may honestly mine or perform the BWH attack in a mining pool. Different strategy profiles will bring different payoffs, in addition influence the selection of the strategies. Therefore, we establish an evolutionary game model to study the behavior tendency of the miners and the evolutionary stable strategies under different conditions, by formulating the replicator dynamic equations. Through numerical simulations, we further verify the theoretical results on evolutionary stable solutions and discuss the impact of the factors on miners’ strategic choice. Based on these simulation results, we also make some recommendations for the manager and the miners to mitigate the BWH attack and to promote the cooperation between miners in a mining pool.

Mild desalination of various raw water streams

2015 ◽  
Vol 72 (3) ◽  
pp. 371-376 ◽  
Author(s):  
C. K. Groot ◽  
W. B. P. van den Broek ◽  
J. Loewenberg ◽  
N. Koeman-Stein ◽  
M. Heidekamp ◽  
...  
Keyword(s):  
Fresh Water ◽  
Laboratory Experiments ◽  
Raw Water ◽  
Literature Study ◽  
Sustainable Operation ◽  
The World ◽  
Commercial Applications ◽  
Study Laboratory ◽  
Selection Of

For chemical industries, fresh water availability is a pre-requisite for sustainable operation. However, in many delta areas around the world, fresh water is scarce. Therefore, the E4Water project (www.e4water.eu) comprises a case study at the Dow site in Terneuzen, The Netherlands, which is designed to develop commercial applications for mild desalination of brackish raw water streams from various origins to enable reuse in industry or agriculture. This study describes an effective two-stage work process, which was used to narrow down a broad spectrum of desalination technologies to a selection of the most promising techniques for a demonstration pilot at 2–4 m³/hour. Through literature study, laboratory experiments and multi-criteria analysis, nanofiltration and electrodialysis reversal were selected, both having the potential to attain the objectives of E4Water at full scale.

scholarly journals The relationship between traditional activities and the mass-space pattern in Bali Aga Customary Village society – Tenganan Pegringsingan

2020 ◽  
Vol 5 (3) ◽  
pp. 373-390
Author(s):  
Lydia Dewi Setiawan ◽  
Purnama Salura ◽  
Bachtiar Fauzy
Keyword(s):  
Cross Sections ◽  
Local Governments ◽  
Traditional Society ◽  
The World ◽  
Space Pattern ◽  
Village Society ◽  
The Relationship ◽  
Selection Of

Globalization is being experienced throughout the world with its impact also observed in architecture, even in traditional villages of Indonesia. Some of them have, however, been able to maintain their identity such as the mass-space pattern of the customary village of Bali Aga Mountains in Bali which is discovered not to have changed. This research was, therefore, conducted to determine the relationship between the activities of the traditional society and their mass-space patterns using the customary village of Bali Aga Tenganan Pegringsingan as the case study. This involved the selection of respondents purposively and collection of data using cross sections by identifying unchanged buildings, taking photos, videos, drones, and through direct interviews in the field. The data obtained were analyzed qualitatively based on structuring theory or ordering principles and the results confirmed the mass-space pattern in Tenganan Pegringsingan village was built due to the close relations with the traditional activities of the society. The findings can be used in developing architecture by local governments as policymakers as well as academic architects and practitioners, and the wider society. © 2020 Lydia Dewi Setiawan, Purnama Salura, Bachtiar Fauzy

Advocacy in Academic Libraries: A Case Study of Selected Academic Libraries in Southwest Nigeria

2020 ◽  
Vol 9 (3) ◽  
pp. 17-20
Author(s):  
R. A. Olurayi
Keyword(s):  
Academic Libraries ◽  
Strategic Objectives ◽  
University Of Technology ◽  
Library Users ◽  
The World ◽  
Southwest Nigeria ◽  
The University ◽  
University Of Ibadan ◽  
Selection Of

This study investigated advocacy in selected academic libraries in the southwest in order to ascertain methods used and challenges faced in the course of advocating for their libraries with possible solutions. It has become necessary to create awareness and also make our libraries visible to the world so that they can be supported in cash and kind. This enables librarians provide the necessary service hence patronage is encouraged. The study adopted a survey research design with two sets of questionnaire(s) which had 34 and 25 items respectively and interview. Random selection of the population comprised of two hundred and seventy seven (277) librarians (professionals and paraprofessionals) and library users mostly lecturers’ from different departments from the University of Ibadan, Ladoke Akintola University of Technology Ogbomoso, Obafemi Awolowo, University Ile Ife and Lead City University Ibadan respectively. Results showed that all the academic libraries in this study have not started advocacy, do not have advocacy plan in their strategic objectives. Therefore, librarians and other library personnel ought to be sent for trainings, workshops and seminars to equip them for advocacy activities. The study recommended that similar study be carried out in other academic libraries across Nigeria to enable librarians understand its importance.

scholarly journals SUITABLE PRODUCTION TOOLS SELECTION WITH THE USE OF EVOLUTIONARY ALGORITHMS

2020 ◽  
Vol 60 (1) ◽  
pp. 56-64
Author(s):  
Petr Hynek ◽  
Viktor Kreibich ◽  
Roman Firt
Keyword(s):  
Evolutionary Algorithms ◽  
Automotive Industry ◽  
Spot Welding ◽  
Production Systems ◽  
Welding Process ◽  
Production Equipment ◽  
Welding Equipment ◽  
Simulation Results ◽  
Selection Of

This paper deals with the use of a production equipment simulation in the design of production systems, more specifically the welding equipment in the automotive industry. Based on the simulation results, a matrix, which defines the possibility of using given manufacturing tools (in this case welding guns are considered) to connect the plates using the electrical resistance spot welding process, is created. This matrix generates a set of several numbers of solutions depending on other parameters, such as the lowest price, the lowest number of used welding guns, etc. The goal is to solve this task. The solution is presented using mathematical programming. Specifically, the method of genetic evolutionary algorithms is being used. The Solver software is used to optimize the selection of the welding guns’ combination. The Solver is an add-on in MS Excel. The case study shows 15 welding points weldment on which the availability of 20 types of welding guns was simulated. The result is an ideal combination of 2 types of guns for the lowest price.

Culture and the plasticity of perception

2020 ◽  
Vol 43 ◽  
Author(s):  
Michael Lifshitz ◽  
T. M. Luhrmann
Keyword(s):  
Cultural Context ◽  
Sensory Experience ◽  
Cultural Learning ◽  
The World

Abstract Culture shapes our basic sensory experience of the world. This is particularly striking in the study of religion and psychosis, where we and others have shown that cultural context determines both the structure and content of hallucination-like events. The cultural shaping of hallucinations may provide a rich case-study for linking cultural learning with emerging prediction-based models of perception.

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