Weibull decision support systems in maintenanceKhalid Aboura
, Johnson Agbinya
, Ali Eskandarian
, 2014, izvirni znanstveni članek
Opis: Background: The Weibull distribution is one of the most important lifetime distributions in applied statistics. Weibull analysis is the leading method in the world for fitting and analyzing lifetime data. We discuss one of the earliest decision support system for the assessment of a distribution for the parameters of the Weibull reliability model using expert information. We then present a different approach to assess the parameters distribution.
Objectives: The studies mentioned in this paper aimed to construct a distribution of the parameters of the Weibull reliability model and apply it in the domain of Maintenance Optimization.
Method: The parameters of the Weibull reliability model are considered random variables and a distribution for the parameters is assessed using informed judgment in the form of reliability estimates from vendor information, engineering knowledge or experience in the field.
Results: The results are the development of modern maintenance optimization models that can be embodied in decision support systems.
Conclusion: While the information management part is important in the building of maintenance optimization decision systems, the accuracy of the mathematical and statistical algorithms determines the level of success of the maintenance solution.
Ključne besede: Weibull distribution, reliability, inference, maintenance, expert opinion
Objavljeno: 23.01.2018; Ogledov: 16; Prenosov: 1
Celotno besedilo (527,86 KB)
Using the 3D virtual environments for teachingMaja Pivec
, 2012, izvirni znanstveni članek
Opis: Virtual worlds represent a powerful media for instruction, offering a wide scope of tools for social interaction and innovation in learning that encourages student participation. Supported by the AVATAR course, teachers were able to productively create teaching and learning environments that support the needs of learners of diverse linguistic, cultural and economic backgrounds, all within a safe virtual environment. This paper outlines the AVATAR course structure, delivery, experiences, and post course reflections on teaching within a 3D virtual world.
Ključne besede: e-learning, 3D virtual environment, course structure, experience
Objavljeno: 23.01.2018; Ogledov: 20; Prenosov: 1
Celotno besedilo (1,12 MB)
Unemployment and government's subsidizingVlado Dimovski
, Miha Marič
, Jasmina Žnidaršič
, Marko Ferjan
, Miha Uhan
, 2011, izvirni znanstveni članek
Opis: Unemployment has become more and more pressing matter nowadays. Governments all across the world are implementing policies to increase the employment rates back to the levels before the economic downturn. One of the most important policies implemented by countries governments were employment subsidies, which means that companies got government funding when employing and also that private citizens had the possibility for entrepreneurship stimulus packages. The scope of our study was to determine how the gross domestic product and the government's subsidizing on a country's level affect the number of unemployed on a country level. We have conducted the empirical part of our study on the case of Slovenia and found out that gross domestic product has a bigger effect on the number of unemployed than government's subsidies.
Ključne besede: labour market, employment, government, subsidies
Objavljeno: 23.01.2018; Ogledov: 17; Prenosov: 1
Celotno besedilo (329,78 KB)
Understanding the structural complexity of induced travel demand in decision-makingJuan Angarita-Zapata
, Jorge Parra-Valencia
, Hugo Andrade-Sosa
, 2016, izvirni znanstveni članek
Opis: Background and purpose: Induced travel demand (ITD) is a phenomenon where road construction increases vehicles’ kilometers traveled. It has been approached with econometric models that use elasticities as measure to estimate how much travel demand can be induced by new roads. However, there is a lack of “white-box” models with causal hypotheses that explain the structural complexity underlying this phenomenon. We propose a system dynamics model based on a feedback mechanism to explain structurally ITD.
Methodology: A system dynamics methodology was selected to model and simulate ITD. First, a causal loop diagram is proposed to describe the ITD structure in terms of feedback loops. Then a stock-flows diagram is formulated to allow computer simulation. Finally, simulations are run to show the quantitative temporal evolution of the model built.
Results: The simulation results show how new roads in the short term induce more kilometers traveled by vehicles already in use; meanwhile, in the medium-term, new traffic is generated. These new car drivers appear when better flow conditions coming from new roads increase attractiveness of car use. More cars added to vehicles already in use produce new traffic congestion, and high travel speeds provided by roads built are absorbed by ITD effects.
Conclusion: We concluded that approaching ITD with a systemic perspective allows for identifying leverage points that contribute to design comprehensive policies aimed to cope with ITD. In this sense, the model supports decision- making processes in urban contexts wherein it is still necessary for road construction to guarantee connectivity, such as the case of developing countries.
Ključne besede: induced travel demand, system dynamics, decision-making, dynamic modeling
Objavljeno: 23.01.2018; Ogledov: 20; Prenosov: 1
Celotno besedilo (1,96 MB)
Trends that will shape the professions of the future information societyAlenka Stanič
, Tanja Urbančič
, 2009, izvirni znanstveni članek
Opis: In this paper we discuss the trends in present society that will have the most important influence in shaping future jobs, with an emphasis on issues related to sustainable development and an information society. We point out that based on the requirements of educated end-users, companies will have to follow the principles of sustainable development and social responsibility. In future, due to technical development, natural resources, environmental issues and demographical trends in the developed western world, the most attractive jobs will be in high technology, health and medical care, as well as the pleasure and free time industry. The most important sectors will be informatics and telecommunication, logistics, safety, healthcare and life-long education.
Ključne besede: information society, knowledge management, end-user, sustainable development, socially responsible companies, jobs of the future
Objavljeno: 22.01.2018; Ogledov: 33; Prenosov: 2
Celotno besedilo (166,80 KB)
Trends in ICT and multimedia supported educationMarko Papić
, Janez Bešter
, 2012, pregledni znanstveni članek
Opis: The formal educational system is facing different problems regarding adaptation towards the needs of a modern knowledge society. In the article, two important and comprehensive challenges to today's formal educational system are discussed and commented upon. The first problem is the incoherence between the needs of the labor market and formal education system outcomes in terms of graduated students. Another problem is the distancing between the prevailing traditional pedagogical methods within formal educational institutions and the ways in which students acquire information and knowledge outside of the schools as they are becoming less and less interested in traditional lectures. It is argued that specific information and communication system technologies (ICT) supported mechanisms, such as social learning and virtual communities may address these challenges. Theories of communities and social learning that may be useful for implementation in the education system are explained and practical implementation is proposed.
Ključne besede: education systems, knowledge society, ICT, multimedia, e-learning
Objavljeno: 22.01.2018; Ogledov: 31; Prenosov: 2
Celotno besedilo (1,04 MB)
Training needs assessment for leaders in nursing based on comparison of competency modelsAndreja Kvas
, Janko Seljak
, Janez Stare
, 2014, izvirni znanstveni članek
Opis: Background and Purpose: The main purpose behind the formation of leadership competency models must be the improvement of leadership. A competency model should serve as one of the tools for selecting the most suitable leaders, appraising their work, assessing training needs and preparing programmes of functional and formal education. The objective of this research is to assess the training needs of leaders in health care. A comparison of leadership competency models between different professional groups should serve as one of the tools with which to assess the training needs of various levels of leaders.
Design/Methodology/Approach: A descriptive study using a survey design was conducted on 141 nurse leaders in Slovenia. Respondents indicated to what extent each of 95 different behaviours was characteristic of a person at their leadership level.
Results: The most important competence dimensions (groups of behaviours) for leaders in health care are (1) at the first - top leadership level: strategic thinking, openness to change and responsibility; (2) for leaders at the second - middle leadership level: relations with co-workers, animation, resistance to stress; and (3) for leaders at the third leadership level: realisation skills, execution of procedures, communication. Training needs assessments were done for three leadership levels in nursing care.
Conclusions: The greatest need for training of nurse leaders can be observed at the third leadership level. Special training programmes should be organised in the competency areas of realisation skills, execution of procedures, communication, education and ethics.
Ključne besede: competence, nursing care, leadership, public administration, Slovenia
Objavljeno: 22.01.2018; Ogledov: 33; Prenosov: 4
Celotno besedilo (288,01 KB)
The transfer of knowledge in intra-organizational networksWładzimierz Sroka
, Joanna Cygler
, Bożena Gajdzik
, 2014, izvirni znanstveni članek
Opis: Background: In today’s business environment, a company is able to maintain its competitive position if it constantly generates knowledge and disseminates this knowledge within the organization, as well as transforms it into new competences. The ability to transfer knowledge becomes one of the key factors in the improvement of a company’s competitive position. This hypothesis is applicable particularly in the case of cooperation within networks, as they are an excellent opportunity for mutual learning between partners.
Objectives: The purpose of the paper is to analyse the process of knowledge transfer in intra-organizational networks.
Method: Due to the specificity of the research object, the case study method has been chosen. In order to make an in-depth analysis of the case study, we selected a group of several criteria based on the theory which we believe to be fundamental to the effectiveness of knowledge management in networks, and compared them with the situation in the ArcelorMittal Group.
Results: Our research show that ArcelorMittal Group has met almost all the criteria of effective knowledge management in its intra-organizational network. Some exceptions, albeit merely to an extent, are mostly the result of historical circumstances, , i.e. the process of growth through acquisitions, and the acquisition of companies at different stages of organizational development, as well as organizational culture.
Conclusion: Based on theoretical assumptions, the study analysed in details the components of knowledge management applied by the corporation in question. Therefore this study might be utilised to formulate a refutable hypothesis and verify them on a larger group of companies from different sectors of the economy. The main limitations of the paper are mostly related to the inherent approach therein
Ključne besede: knowledge, knowledge transfer, knowledge management, networks, case study analysis
Objavljeno: 22.01.2018; Ogledov: 40; Prenosov: 1
Celotno besedilo (235,90 KB)
The relationship between optimism, pre-entrepreneurial curiosity and entrepreneurial curiosityMitja Jeraj
, 2014, izvirni znanstveni članek
Opis: Background: Entrepreneurship and entrepreneurs become more and more interesting fields for a scientific research. This paper addresses the relationship between optimism, pre-entrepreneurial curiosity and entrepreneurial curiosity as three determinants of entrepreneurial psychology. Literature review showed optimism is important for entrepreneurs and influence them mostly in a positive way. Although entrepreneurial curiosity is important determinant for entrepreneurs and it was connected with entrepreneurial self-efficacy, openness, and company's growth the connection with optimism remained unexplored until this research.
Methods: A multi-country empirical validation was conducted on a sample of entrepreneurs from Slovenia and USA. A structural equation modelling, exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were used to develop a model, which complement theoretical predisposition and fit the data.
Results: The results of the study show that higher levels of optimism lead to higher levels of pre-entrepreneurial curiosity and higher levels of pre-entrepreneurial curiosity lead to higher levels of entrepreneurial curiosity.
Conclusions: The contribution of this study is manifold. From the theoretical view, a literature gap on the field of optimism and entrepreneurial curiosity combined is fulfilled and a structural equation model with optimism and entrepreneurial curiosity was established. Since openness, pre-entrepreneurial curiosity and entrepreneurial curiosity are related policy makers can test individuals according to their level of researched determinants and motivate more entrepreneurial perspective ones to become active in the entrepreneurship process. Thus, entrepreneurs can use these results to recruit more entrepreneurial oriented employees.
Ključne besede: enterprises, entrepreneurs, entrepreneurship
Objavljeno: 22.01.2018; Ogledov: 29; Prenosov: 1
Celotno besedilo (330,64 KB)
The relationship between delay in announcing quaterly forecasts of annual earnings and the type of earnings newsMahdi Moradi
, Mahdi Salehi
, Seyyed Saeed Mehrdad Ayask
, 2013, izvirni znanstveni članek
Opis: The current study aims to examine the relationship between delay in the announcement of quarterly forecasts of annual earnings and the type of earnings news in a unique context. Running a multiple linear regression on data collected from Rahavard Novin software and the companies’ financial statements, is the method of this study to investigate this relationship. Consistent with the pattern of good news early, bad news late, it was found that there is a positive relationship between the bad news type and the amount of delay in announcing quarterly forecast of annual earnings; so that the firms with negative adjustments in earnings forecast (bad news), on average, have 12 more days delay in the announcement. Considering other variables showed that as coverage percentage - a sign of success - increases, the amount of delay in announcing earnings forecast decreases, but companies with losses per share, on average, have an additional delay of about 6 days. The results obtained indicate that at least, in some industries there is certain time for reporting. Finally, it became clear that in the period after the adoption of the new disclosure instruction, despite the increased deadline, the amount of delay in earnings announcement has declined by about 2 days. In this study, for the first time in Iran, one of the company’s financial news (quarterly forecasts of annual earnings), have been classified into good and bad, based on comparison with the market expectation, and the relationship between the news type and the amount of delay in announcing the news, has been examined.
Ključne besede: reporting delay, good news, bad news, annual earnings per share quarterly forecast
Objavljeno: 22.01.2018; Ogledov: 33; Prenosov: 1
Celotno besedilo (213,46 KB)