Search results for "Quantitative"
showing 10 items of 2409 documents
On the Sustainability Evaluation in Sheet Metal Forming Processes
2011
In sheet metal forming processes there is still a lack of knowledge in the field of environmental sustainability mainly due to the need of a proper modeling of issues and factors to be taken into account. Such topic is, nowadays, a urgent and remarkable issue in manufacturing and the main concerns are related to more efficient use of materials and energy. What is more, the estimation of environmental burdens of forming technologies is very complex to be accomplished since it is essentially process-dependent. This means that when comparing, for instance, a traditional forming process with an innovative one, there are some peculiar aspects to be considered; actually, processes can be rather d…
An integrative approach of the marketing research and benchmarking
2017
The accuracy of the manager’s actions in a firm depends, among other things, on the accuracy of his/her information about all processes. At this issue, developing a marketing research is essential, because it provides information that represents the current situation in organization and on the market. Although specialists devote the marketing research exclusively to the organizational marketing function, practice has shown that it can be used in any other function of the company: production, finance, human resources, research and development. Firstly, the paper presents the opportunities to use the marketing research as a management tool in various stages of creative thinking. Secondly, bas…
Interior permanent magnet synchronous motors: Impact of the variability of the parameters on their efficiency
2016
In the scientific literature, various authors presented different control strategies aimed to increase the efficiency of the interior permanent magnet synchronous motors. These strategies, starting from a well-known mathematical model of the dynamic behaviour of the motor, are able to reduce the power losses acting on the magnetizing component of the stator current. However, none of the proposed approaches takes into account that, varying the working conditions of the motor, also the values of the parameters, which have an impact on the power losses, can vary. In this paper, therefore, starting from an accurate measurement of the motor characteristics for various values of speed and load, w…
A cogging torque minimization procedure for IPMSMs based on different laminate geometry
2016
This paper presents a possible minimization procedure of the cogging torque generated by an IPMSM (Interior Permanent Magnet Synchronous Machine) with a progressive modification of a basic geometrical structure of rotor laminates. More in detail, an IPMSM model is analyzed by using a Finite Element Method (FEM) approach. Then, other IPMSM models, which are obtained by modifying the geometry of the IPMSM rotor laminates and by maintaining the same stator configuration, are proposed and discussed. From the obtained simulation results, the cogging torque components for each structure are determined by means of FEM and compared to each other. From this comparison, it can be stated that the cogg…
Closed-loop bandwidth impact on MVSA for rotor broken bar diagnosis in IRFOC double squirrel cage induction motor drives
2013
This paper investigates the detectability of rotor broken bars in indirect rotor flux oriented control (IRFOC) for variable speed double cage induction motor drives, using vibration signature analysis techniques. The Impact of the closed loop control system cannot be neglected when the detection of rotor asymmetries in the machine is based on the signature analysis of electrical or mechanical variables. Therefore, the investigation of rotor fault components for different bandwidths of closed-loop regulators is necessary to evaluate its relevance in the above listed variables. This paper investigates the impact of the control system on relevance of the fault components computed from axial an…
Protective role of glutathione addition against wine-related stress in Oenococcus oeni
2016
FIliació URV: SIInclòs a la memòria: SI Oenococcus oeni is the main species responsible for the malolactic fermentation (MLF) of wine due to its ability to survive in this environment. Some wine-related stress factors, such as ethanol and low pH, may alter the cell redox balance of O. oeni. For the first time, the ability to uptake glutathione (GSH), an almost universal tripeptide with antioxidant properties, has been associated to the improvement of stress response in O. oeni. Despite the inability of O. oeni to synthesize GSH, this bacterium can capture it from the media. The ability of 30 O. oeni strains to uptake GSH was assessed in this study. Although all of the strains tested were ab…
Entrepreneurial Metaphors and Concepts: An Exploratory Study
1999
IN THE PAST RESEARCH THERE HAS BEEN continued controversy over the definition of entrepreneurship and the identification of entrepreneur. By combining the ideas of entrepreneurship and linguistics, this paper takes a new approach to examining the definitions. An exploratory analysis of entrepreneurial metaphors and concepts is conducted to achieve this goal. In a quantitative analysis of entrepreneurial concepts respondents defined the terms 'entrepreneur' and 'entrepreneurship' with suggested conceptual equivalents. In an analysis of metaphor, informants formed metaphoricalexpressions of entrepreneurship. The sample consisted of 751 respondents from Finland, Sweden, Norway, Ireland, Canad…
ENTREPRENEURSHIP: METAPHORS AND RELATED CONCEPTS
1998
In past research there has been continuous controversy over the definition of entrepreneurship and the identification of entrepreneurs. By combining the ideas of entrepreneurship and linguistics, this paper takes a different approach to examining entrepreneurial definitions. An exploratory analysis of entrepreneurial metaphors and concepts is conducted to study informants' perceptions of these two terms. The sample consists of 751 respondents from Scandinavia, Ireland, Australia and Canada. In the quantitative analysis of entrepreneurial concepts, respondents defined the terms 'entrepreneur' and 'entrepreneurship' with suggested conceptual equivalents. In the metaphor analysis, informants …
Assessment methods for impact of environmentally friendly entrepreneurship and driving forces to the quality of environment
2002
Environmentally friendly entrepreneurship (further – EFE) is one of the tools for improvement environmental quality. There might be made theoretical approaches, how quantitatively large is the impact of the EFE in changes of the quality of environment. In this field theoretical suggestion is prior to practice, because in the most of countries there is domination of several cases, but it could not be used as overall tendency [8; 10]. Opposite impact to quality of environment might be created by driving forces (driving forces are economical indicators, which stimulate changes in quality of environment) [1] like overcon‐sumption, growth of gross domestic product (further – GDP) etc. The articl…
The Berkeley Innovation Index: A Quantitative Approach to Measure, Track and Forecast Innovation Capability Within Individuals and Organizations
2018
Innovation and entrepreneurship are essential processes for human development, market growth, and technological breakthroughs, and it is vital for economic growth. Despite its importance, innovation is inherently difficult to measure and hence it is almost impossible for an individual or organization to know how they can improve their innovation output or claim that they are great at innovation. This paper presents a novel approach to measure and quantify innovation, called the Berkeley Innovation Index (BII). The BII characterizes and measures innovation capability of an individual or an organization. It builds on the hypothesis that innovation performance depends on the people, culture, a…