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Measuring the Innovation Capacity in the Firm Level, Introducing Attributes and Instrument
, M.Sc. Thesis Sharif University of Technology ; Arasti, Mohammad Reza (Supervisor)
Abstract
In this dissertation، with regard of the importance of innovation and being innovative in the competitive conditions of the markets in the world، and the need of companies for some permanent competitive advantages، we are looking for some models and finding or creating some instruments to know and create knowledge for basics of innovation and innovation capacity before measuring the outputs of innovative projects، as innovation capability، and have the needed knowledge for managing resources and having the intransitive tendency to important factors that crystallize the structure of innovation capacity. For this purpose، we had a vast literature review with reading so many books about...
Multi-directional co-flow fluidic thrust vectoring intended for a small gas turbine
, Article 2007 AIAA InfoTech at Aerospace Conference, Rohnert Park, CA, 7 May 2007 through 10 May 2007 ; Volume 3 , 2007 , Pages 2278-2286 ; 1563478935 (ISBN); 9781563478932 (ISBN) ; Saghafi, F ; Ghoreyshi, M ; Pilidis, P ; Sharif University of Technology
2007
Abstract
This paper concerns an understanding of thrust vectoring, in the presence of co-flowing secondary air. An experimental and computational study was performed on a circular-shape nozzle, integrated with a Coanda surface, to investigate the feasibility of multi-directional deflection of the engine exhaust gases. The vectoring angle was controlled by the relative blowing momentum of air that was injected tangentially through the slots, surrounding the main nozzle. A state of the art design that uses a small step, just after the main nozzle to turn the flow into eddy, was also employed to enhance the effectiveness of the method. The secondary section was divided into four identical sections for...
Experimental and computational investigation into the use of co-flow fluidic thrust vectoring on a small gas turbine
, Article Aeronautical Journal ; Volume 112, Issue 1127 , 2008 , Pages 17-25 ; 00019240 (ISSN) ; Saghafi, F ; Ghoreyshi, M ; Pilidis, P ; Sharif University of Technology
Royal Aeronautical Society
2008
Abstract
This paper presents the application of a relatively new technique of fluidic thrust-vectoring (FTV), named Co-flow, for a small gas-turbines. The performance is obtained via experiment and computational fluid dynamics (CFD). The effects of a few selected parameters including the engine throttle setting, the secondary air mass-flow rate and the secondary slot height upon thrust-vectoring performance are provided. Thrust vectoring performance is characterised by the ability of the system to deflect the engine thrust with respect to the delivered secondary air mass-flow rate. The experimental study was conducted under static conditions in an outdoor environment at Cranfield University workshop...
A general model for multicomponent transport in nonporous membranes based on Maxwell-Stefan formulation
, Article Chemical Engineering Communications ; Volume 191, Issue 4 , 2004 , Pages 460-499 ; 00986445 (ISSN) ; Farhadpour, F. A ; Soltanieh, M ; Sharif University of Technology
Taylor and Francis Ltd
2004
Abstract
A "general" model of membrane transport was formulated using the mechanistic Maxwell-Stefan approach and generalized driving forces, which included the contribution from the various internal and external driving forces. Transient models of dialysis and pervaporation were developed that used exactly the same general model to describe the transport through the membrane. In this model, the bulk solution/polymer equilibria were described by a modified Flory-Huggins model, and the concentration dependence of ternary Maxwell-Stefan diffusivities was described by a natural extension of the binary Vignes relationship to a multicomponent system. A notable advantage of the general model lies in the...
Multicomponent transport across nonporous polymeric membranes
, Article Desalination ; Volume 144, Issue 1-3 , 2002 , Pages 93-101 ; 00119164 (ISSN) ; Farhadpour, F. A ; Soltanieh, M ; Sharif University of Technology
Elsevier
2002
Abstract
The theoretical description of multicomponent transport across nonporous polymeric membranes was investigated using two alternative frameworks: the phenomenological approach of irreversible thermodynamics and the mechanistic Stefan-Maxwell formulation. The transport models developed account for potential equilibrium and/or kinetic coupling of fluxes and the contribution of diffusion induced non-selective flow within the polymer. The models were validated against transient dialysis and pervaporation data for the {ethanol-water}/silicone rubber system. A critical assessment was obtained by recovering the model parameters from the dialysis data and using the same parameters to predict the...
Transport of small polar molecules across nonporous polymeric membranes: II. Shortcomings of phenomenological models of membrane transport
, Article Journal of Membrane Science ; Volume 211, Issue 2 , 2003 , Pages 215-234 ; 03767388 (ISSN) ; Farhadpour, F. A ; Soltanieh, M ; Abdelghani, M ; Sharif University of Technology
2003
Abstract
A molecule within the nonporous polymeric membrane moves in response to the local driving force and has no memory of how it entered the membrane or how the local gradients were generated. This means that a properly formulated model of transport within the membrane should be equally applicable to dialysis, pervaporation or vapour permeation. The phenomenological approach of irreversible thermodynamics was used to develop transient models of dialysis and pervaporation. The model developed in this study were validated against transient dialysis and pervaporation data for ethanol-water/silicone rubber system. A critical assessment was obtained by recovering the model parameters from the dialysis...
Transport of small polar molecules across nonporous polymeric membranes: I. Experimental procedures and data analysis
, Article Journal of Membrane Science ; Volume 211, Issue 2 , 2003 , Pages 193-214 ; 03767388 (ISSN) ; Farhadpour, F. A ; Soltanieh, M ; Bansal, A ; Sharif University of Technology
2003
Abstract
The transient measurement of concentration profile within the liquid boundary layer close to the membrane interface and the flux of permeating species across the membrane coupled with transient model of membrane allows a more critical evaluation of membrane transport performance. The experimental procedure for transient measurement of pervaporation fluxes and data obtained for the {ethanol-water}/silicone rubber system and experimental set up for transient dialysis measurement by interferometry technique for the same system was described. A detailed analysis of optical effect accounting for the light deflection in a medium of varying refractive index profile was presented. A numerical...
The impact of MOF feasibility to improve the desalination performance and antifouling properties of FO membranes
, Article RSC Advances ; Volume 6, Issue 74 , 2016 , Pages 70174-70185 ; 20462069 (ISSN) ; Rahimpour, A ; Khoshhal, S ; Firouzjaei, M. D ; Ghoreyshi, A. A ; Sharif University of Technology
Royal Society of Chemistry
2016
Abstract
In this study, a hydrophilic metal-organic framework (MOF) was applied to improve the performance of a cellulosic membrane for forward osmosis (FO) desalination application. The characterization results confirmed that the MOF particles existed within the matrix of the modified membrane. The MOF loading led to adjustment of the membranes in terms of overall porosity, pore inter-connectivity and hydrophilicity. These features caused an improvement in the pure water permeability (72%) and reduce the structural parameter of the modified membrane to 136 μm. The FO water flux of the modified membrane enhanced by about 180% compared to an unmodified membrane, without decreasing its selectivity. FO...
, M.Sc. Thesis Sharif University of Technology ; Alavi, Babak (Supervisor)
Abstract
The measure of success in a company is determined by a high performing workforce that demonstrates the competencies necessary to drive the business success, while meeting the organization's strategic goals. This is where competency-based human resource management becomes important. The main factor contributing to the above noted area is the identification of core competencies. There has been a lot of research in this area during the past few years. Each research demonstrates an approach for the development of critical human resource competency models in an organization. In order to determine the foregoing competency model, the early studies in this area have been focused on the distinction...
The Evaluation of Application of Unfolding Model of Turnover to Explain the Turnover of Knowledge Workers in Some Iranian Software Companies
,
M.Sc. Thesis
Sharif University of Technology
;
Alavi, Babak
(Supervisor)
Abstract
Voluntary turnover has direct and indirect expenses for organizations and for this purpose; it has one of the richest literatures in academic works. Due to the especial role of knowledge workers in organizations, these expenses in knowledge-based organizations are more important and more costly than that of other organizations. One of the latest theories in the field of voluntarily turnover was introduced by Lee and Mitchell (1994) that was named “Unfolding Model of Turnover” to describe the process of decision of voluntary turnover. This theory is distinguished from its similar theories from two main aspects: First, they introduced new elements like shock. Second, they introduced...
A Study on Relationships between Career Anchors and Career Orientations
, M.Sc. Thesis Sharif University of Technology ; Alavi, Babak (Supervisor)
Abstract
Career Orientations or career choices, can be affected by internal and external factors. External factors are the environmental conditions that the reward and the attractiveness of selecting a career choice are dependent to them. Internal factors include the needs of oneself from his/her job, his/her beliefs and his/her skills and competencies about the job. In this research the internal antecedents of managerial and technical orientations between programmers have been identified. On the other hand the perception of people about the compensation system as an external factor which can affect the mentioned relationships, have been analyzed. It seems that this is the first research which career...
The Hidden Side of Coin: What Self Leadership Strategies Are Applied by Successful Iranian Women Entrepreneurs?
, M.Sc. Thesis Sharif University of Technology ; Alavi, Babak (Supervisor)
Abstract
Women are going to play more important roles in the economy of most countries including Iran. Hence, since the number of entrepreneurs among women is increasing, identifying characteristics and other factors that cause these group to be successful, is a critical issue. Studies show that entrepreneurs, especially women entrepreneurs, face numerous problems in their career. These problems are especially more demanding in societies with unique cultural attributes. Therefore, applying personal and managerial solutions in order to overcome these problems are necessary. On the other hand, researchers believe that one of the most effective and beneficial concepts helping entrepreneurs in their...
Self-Leadership Strategies in Teamwork and Share Leadership Orientation with the Mediating Effect of Self-Efficacy
, M.Sc. Thesis Sharif University of Technology ; Alavi, Babak (Supervisor)
Abstract
The main purpose of this study is to evaluate the linkage between two constructs about teamwork activities. One of them is "self-leadership in teamwork", the extent to which a person could control and manage his thoughts and activities in teamwork. The other is "shared leadership orientation", which is about orientation of people to contribute in leadership processes. This linkage evaluated with consideration of "self-efficacy in shared leadership" as a moderator.
Questionnaires of self-leadership in teamwork and self-efficacy in shared leadership elicited from literature with a little change and shared leadership questionnaire developed in another study by the author.Questionnaires...
Questionnaires of self-leadership in teamwork and self-efficacy in shared leadership elicited from literature with a little change and shared leadership questionnaire developed in another study by the author.Questionnaires...
Identifying the Ethical Dilemmas Confronting Human Resource Managers of Iranian Project Based Companies and Exploring their Causes
, M.Sc. Thesis Sharif University of Technology ; Alavi, Babak (Supervisor)
Abstract
The present study was performed aiming to identify the ethical dilemmas human resource managers confront with in Iranian project-based organizations as well as to trace out the underlying causes. “Ethical dilemma” refers to a decision making situation in which ethical considerations render all the alternatives inapt, thence making the decision making process ethically complex. First of all, a theoretical framework was developed based on the preceding research; then, the study was further conducted utilizing a qualitative research method with an exploratory approach. The data were collected using in-depth interviews and analysed using the theme analysis method. The corresponding interviewees...
Multiple Case Study of Distributed Leadership Effectiveness in Educational Major FoundingTeams of Sharif University of Technology
,
M.Sc. Thesis
Sharif University of Technology
;
Alavi, Babak
(Supervisor)
Abstract
Using Distributed leadership framework while studying the leadership phenomena in teams, especially in educational environment, has received more attention by scholars in these years. Although the results of these researches indicated positive consequences mostly, the need for exploratory studies to identify situational and contextual factors in distributed leadership effectiveness has been mentioned. In other words, it has been suggested that the effectiveness of distributed leadership in teams may be affected by situational and contextual factors. In the current multiple case study, after the initial study of leadership and its functions in some schools of Sharif University of Technology,...
Identification of Influence Mechanisms of Executive/non-executive Board Composition on Board’s Attribution Style
, M.Sc. Thesis Sharif University of Technology ; Alavi, Babak (Supervisor)
Abstract
The influence mechanisms of executive/non-executive board compostion on board’s attribution style have been explored. In two case studies, I have examined boards’ causal interpretation about a critical incident which had a significant impact on firm performance. A qualitative research approach has been taken in the case studies. Data was gathered through semi-structured interviews with all board members and was analyzied with the theme analysis method. According to the results, board of directors’ collective attribution formation process can be devided into three stages of members’ expression of information and facts at board meetings, forming the individual judgements of members and at...
Optimal Assignment of Patients from Emergency Department to Inpatient Hospital Wards
, M.Sc. Thesis Sharif University of Technology ; Haji, Babak (Supervisor)
Abstract
Emergency Department (ED) overcrowding is one the most problems and challenges that every Emergency Department all over the world is facing with. This problem leads to some problems like prolonged waiting times and Length of Stay in Emergency Department. “Boarding time” is one of the most important ones, which is the time a patient spend for being transferred from Emergency Department to one of the Hospital Inpatient Wards. One important solution to this problem is “overflowing”, and it means allocating patients to an alternative ward rather than their primary ward. In practice, the overflowing process usually controlled in a myopic manner. Limited number of researches that focus in this...
Analyzing Networks by Means of Friendship Paradox
, M.Sc. Thesis Sharif University of Technology ; Haji, Babak (Supervisor)
Abstract
Due to the vast application of networks in the modeling of problems, the analysis of networks has been gaining a noticeable importance in recent researches. There are some cases in which we are looking for nodes that are highly connected to other nodes. However, the detailed information of the network structure is not always available; or because of complexity, it is not possible to investigate whole network and pick high-degree nodes; or investigating the network completely is too time-consuming. In such cases, algorithms which do not need the whole network information play a significant role. Friendship paradox as a topological feature of graphs can be helpful in designing such algorithms....
Identifying Effective Parameters on Internal Motivation on Delegation Process at Knowledge Based Companies
, M.Sc. Thesis Sharif University of Technology ; Alavi, Babak (Supervisor)
Abstract
It has been reported that in some organizations despite delegation according to its concept, some of the organization members don’t have an internal motivation to use the autonomy that has been delegated to them. This problem might have different aspects. From the self-determination theory perspective, this might be because of unsatisfied basic needs of the person. For example, if all options the person has, are desirable or all of the options are undesirable and the person can’t choose between them. This might result in unsatisfied basic needs of the person. Due to these conditions, there is a probability that she won’t have an internal motivation to use autonomy. In some researches, it has...
An Empirical Study of the Relationship between Emergent States and Behavioral Processes of the Board
, M.Sc. Thesis Sharif University of Technology ; Alavi, Babak (Supervisor)
Abstract
In this research study, the reciprocal relationship between Emergent States and Team Processes has been analyzed in boards of directors, by using case study method with semi-structured interview as the method of data collection and thematic analysis as the method of data analysis. This research was conducted on the companies which are active in Information Technology industries, their size is in the range of SMEs, and have passed the early startup stage and an external investor has joined the board. After thematic analysis, narrating each case’s story, and theoretical analysis on each case, the obtained results are demonstrated with discussion on both cases, introducing a theoretical model,...