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Relationship Between Feedback-Seeking Motives and Dimensions and Individual Performance in an Iranian Knowledge-Based Organization
, Ph.D. Dissertation Sharif University of Technology ; Alavi, Babak (Supervisor) ; Miremadi, Iman (Supervisor)
Abstract
The present study investigates the relationships between feedback-seeking dimensions (frequency, method, timing, and content) and two types of individual performance (goal achievement and behavior-related performance). In addition, the relationships between feedback-seeking motives and feedback-seeking dimensions are examined. The purpose is to identify new explanations for the inconclusive results of the direct relationship between feedback-seeking and performance in the literature. Moreover, this study investigates work motivations based on self-determination theory as the antecedents of feedback-seeking motives. This study contains one qualitative phase and two quantitative ones....
Information Superiority between Individual and Institutional Traders in Tehran Stock Exchange
, M.Sc. Thesis Sharif University of Technology ; Keshavarz Haddad, Gholamreza (Supervisor)
Abstract
Informational inequality between institutional and individual traders is one of the centric issues in financial markets. The preference of each of these groups to attain personal information may provide other traders important information. New traders could make a profit by addressing the preferable group and following its transactions. This study aims to determine the winner group at attaining more personal information, by breaking down the probability of informed trading (PIN), one of the most famous measures in informational risk to two main components: the probability of informed trading of individuals (DPIN) and the probability of informed trading of institutions (SPIN). Moreover, the...
Individual and Institutional Trading in Tehran Security Exchange and Stock Return
, M.Sc. Thesis Sharif University of Technology ; Bahramgiri, Mohsen (Supervisor) ; Haghpanah, Farshad (Supervisor)
Abstract
In finance literature there are different views of individual and institutional investors for variety of reasons. Despite having consensus on the difference of individual and institutional investors due to complexity and size, it seems there are much disagreement on how they affect the key process of market like return and liquidity. In this paper we consider the effect of individual and institutional trading on the short-term return of stocks. Specifically, first we define some factors to measure the trading activity of individual and institutional investors. Then we use these factors to sort each stock in the cross section to create decile portfolios and we compare the short-term return...
Individual Investor Trading and Stock Returns
, M.Sc. Thesis Sharif University of Technology ; Talebiyan, Masoud (Supervisor) ; Ebrahimnejad, Ali (Supervisor)
Abstract
For a Variety of reasons, financial economists tend to view individuals and institutions differently. In particular, while institutions are viewed as informed investors, individuals are believed to have psychological biases and are often thought of as the proverbial noise traders. One of the questions of interest to researchers in finance is how the behavior of different investor clienteles or their interaction in the market affects returns. In this paper we focus on the interaction between individual investors and stock returns in Iran capital market. Specifically, first we examine the extent to which intense net buying or selling by individuals in a stock is related to the stock’s past...
Smart Momey Effect Among Investors of Active Mutual Funds
, M.Sc. Thesis Sharif University of Technology ; Keshavarz Haddad, Gholamreza (Supervisor) ; Ebrahimnejad, Ali (Supervisor)
Abstract
We study the ability of individual and institutional investors in predicting the performance of active mutual funds in Iran. Our dataset contains monthly inflow and outflow of mutual funds and monthly TNA invested by individual and institutional investors. To evaluate investor performance, we construct portfolios based on inflow and outflow of funds and estimate their alpha using the Carhart (1997) four-factor model. We find evidence that the net flow to the funds predicts their returns. Smart money effect is mainly driven by funds with high normalized outflow and high normalized inflow. Further, we separately evaluate the performance of individual and institutional flows and find that both...
Investigating the Effect of Manager's Ambidexterity on Organizational Ambidexterity in Small Hi-Tech Companies
, M.Sc. Thesis Sharif University of Technology ; Khalili Nasr, Arash (Supervisor)
Abstract
Previous Research has extensively investigated ambidexterity in organizational and individual level and evaluated their prescedents and outcomes. These studies have led to an agreement on the positive relationship between ambidexterity in different levels and performance, in dynamic business environments. Unlike before, recent studies in the context of ambidexterity have been focused on the prescedents of ambidexterity in the individual level. However very few studies have empirically investigated the direct relationship between ambidexterity in different levels. In this research we have focused on the relationship between the top manager's ambidexterity and the organizational ambidexterity...
Identifying Crowdfunding Key Success Factors in Nonprofit Sector
, M.Sc. Thesis Sharif University of Technology ; Maleki, Ali (Supervisor)
Abstract
Social problems are growing rapidly while the resources including financial resources, available for third sector organizations are insufficient. Besides terms such as Social Innovation and Social Entreprenurship that concern effectiveness and efficiency of approaches trying to solve social problems, new forms of finance has been emerged in the fileld of Social Finance in order to increase the amount and diversity of fianacial resources available for social organizations in different stages of their lifecycle. Crowdfunding is a new form of finance that emerged due to 2008 economic crisis of America in order to increase the access of Entrepreneurs, Innovators and SMEs to financial resources....
The Species Problem, Answers and Philosophical Considerations of Human Nature
, M.Sc. Thesis Sharif University of Technology ; Azadeghan, Ebrahim (Supervisor)
Abstract
One of the most important philosophical issues in biology that continues to receive attention is the issue of species. Since ancient times, the classification of living organisms and the definition of species as its foundation have been of great importance to thinkers and knowledge seekers. In this research, while addressing various perspectives, this subject is still being examined today. This research has been divided into two main sections. The first section includes the definition of the problem and various perspectives on it. The main perspective focuses on the influence of genetics in strengthening or weakening it, while the secondary perspective, although interesting, is seen as a...
Spontaneous Order of Market and Institutional Challengaes
, M.Sc. Thesis Sharif University of Technology ; Mirjalili, Hossein (Supervisor)
Abstract
Hayek is one of the most impressive figures of Austrian School of Economics established by Carl Menger. The Thinkers of this school of thought believed that governments should not intervene in the market process. They argued that such interventions would spoil the market performance in resource allocation. Hayek believes that the order which emerges from the market is a spontaneous one; it means no one has designed it, but it has evolutionarily evolved by distinctive agents' actions who had no plan to make it. Hayek's arguments for spontaneous order are based on some epistemological presuppositions such as: "methodological individualism", "methodological subjectivism", "tacit knowledge" and...
Iranian EFL Learner's Willingness to Communicate: The Roles of Motivation, Communication Anxiety, Linguistic Self-confidence, and Attitude
, M.Sc. Thesis Sharif University of Technology ; Alemi, Minoo (Supervisor) ; Tajeddin, Zia (Co-Advisor)
Abstract
Willingness to communicate (WTC) has recently received great attention in the area of second language learning. Thus, the concept of willingness to communicate and what would influence the students' willingness to communicate gain importance. The current study employed a hybrid design to probe Iranian students' willingness to communicate. First, self-report questionnaires were administered to 431 language learners to collect quantitative data. Then, interviews were conducted with 41 randomly selected learners who had already completed the questionnaires. Pearson correlation coefficient, one-way ANOVA, independent t-test through SPSS .16 and the Structural Equation Model (SEM) analyses...
A Simultaneous Approach for Activity Type and Activity Duration of Disabled People
, M.Sc. Thesis Sharif University of Technology ; Samimi, Amir (Supervisor)
Abstract
Daily activity patterns that include type and duration of activities are modeled simultaneously in MDCEV models. Conventionally, however, a diverse range of econometric models are used to sequentially model the decisions. Focusing on the disabled individuals, we aimed at comparing the prediction power of the two methods. A three level Nested Logit along with a Hazard model represent the sequential approach, the performance of which is compared to the MDCEV method. A random forest model is applied during the activity type prediction by MDCEV model. With considering 6.35 percent error in random forest model, the results confirmed that simultaneous approach improves activity type prediction by...
Developing the Dynamic Increasing Amplitude and Period (DIAP) Method and Investigation of its Efficiency in Ultimate Capacity Assessment of Jacket Offshore Platforms
, Ph.D. Dissertation Sharif University of Technology ; Abbaspour Tehranifard, Majid (Supervisor) ; Tabeshpour, Mohammad Reza (Co-Supervisor) ; Karimirad, Majid (Co-Supervisor)
Abstract
Dynamic increasing amplitude and period (DIAP) [1] is a time-domain analysis methodology developed based on endurance time (ET) analysis method [2], which can be used to evaluate the response of marine structures when encounters a continuous loading, such as storm conditions. In this method, instead of using separate records with different intensities, a single loading record with an increasing intensity over time is used for structural analysis. The ability to enter spectral concepts, considering the effects of waves with different frequencies and amplitudes, taking into account the effects of randomness of waves and the possibility of short duration analysis are some of the specific...
Joint Analysis of fMRI Multi-subject Data to Extract Common Spatial and Temporal Sources
, M.Sc. Thesis Sharif University of Technology ; Shamsollahi, Mohammad Bagher (Supervisor)
Abstract
Objective: Joint analysis of multi-subject brain imaging datasets has wide applications in biomedical engineering.In these datasets, some sources belong to all subjects (joint), a subset of subjects (partially-joint), or a single subject (individual). In this thesis, this source model is referred to as joint/partiallyjoint/individual multiple datasets unidimensional (JpJI-MDU), and accordingly, a source extraction method is developed.Method: We present a deflation-based algorithm utilizing higher order cumulants to analyze the JpJI-MDU source model. The algorithm maximizes a cost function which leads to an eigenvalue problem solved with thin-SVD (singular value decomposition) factorization....
Operational Analysis of a Photovoltaiec Plant as a Micorgird
, M.Sc. Thesis Sharif University of Technology ; Ranjbar, Ali Mohammad (Supervisor)
Abstract
Nowadays, high reliability requirements for commercial and industrial loads, make it necessary to install microgrids for supplying the loads during power outages. Due to the fact that solar energy is clean, free of noise pullotion and also it benefits from the governmental obligations, it is a wealthy choice for supplying the load in microgrid. Designing and operation of the photovoltaic microgrid are the two important steps that should be considered. In this thesis, these two steps have been investigated by integrating a battery system into a solar PV plant and control of PV mictrorid in islanded mode. In the designing step, the optimum battery bank is calculated. For calculating the...
Design of a Statistical Control Chart for Simultaneous Monitoring and Fault Isolation of Mean Vector and Covariance Matrix of Multivariate Multistage Processes
, M.Sc. Thesis Sharif University of Technology ; Akhavan Niaki, Taghi (Supervisor)
Abstract
In modern industries, multivariate multistage auto-correlated processes are widely used to ensure productivity and product quality. Interconnections between work stations bring a challenging task in detecting various shifts and identifying their root causes. In addition, simultaneous monitoring process mean and variability with single control chart methods has gained considerable attention throughout these years. In this article, a double-max multivariate exponentially weighted moving average (DM-MEWMA) chart is proposed based on two novel statistics to monitor the parameters of multivariate multistage auto-correlated processes jointly. Prior knowledge of variation propagation has been used...
Multivariate Process Variability Monitoring Improvements
, Ph.D. Dissertation Sharif University of Technology ; Akhavan Niaki, Taghi (Supervisor)
Abstract
We consider finding some efficient control schemes for multivariate variability monitoring with capability of working with individual observations. To do this, the existing efficient control charts for multivariate variability monitoring are studied first and it is determined that the and control statistics, defined by individual observations, estimate the covariance matrix quite well. However, the control method that is based on monitoring the trace of these matrices is not necessarily the best. Thus, by applying the first and the second norm on these two statistics, four new control schemes, namely MEWMSL1, MEWMVL1, MEWMVL1 and MEWMVL2are proposed. Performance comparison results show...
Optimal design of stand-alone PV/ wind generator and diesel system by using individual particle optimization algorithm
, Article International Review of Electrical Engineering ; Vol. 7, issue. 5 , 2012 , p. 5474-5486 ; ISSN: 18276660 ; Abbaspour-Tehrani-Fard, A ; Ehsan, M ; Fotuhi-Firuzabad, M ; Abroshan, M ; Sharif University of Technology
Abstract
In this paper an optimized wind/PV hybrid system with battery and diesel backup is designed. As a result of this study the costs of the hybrid system will be minimized in its 20-year life time. The optimization is done by considering the annual load increase and fuel cost rise. This Optimization is subject to load covering and minimizing the total cost. The total cost entailed maintenance, equipment and diesel fuel consumption substitution. An advanced variation of individual particle optimization algorithm (IPO) is used to solve the optimization problem
Swarm aggregation using emotional learning based intelligent controller
, Article 2009 6th International Symposium on Mechatronics and its Applications ; 2009 , Article number 5164827 ; ISBN: 9781424434817 ; Vatankhah, R ; Alasty, A ; Vossoughi, G ; Sharif University of Technology
Abstract
In this paper, we consider a control strategy of multi-robot systems, or simply, swarms, based on emotional control technique. First, we briefly discuss a "kinematic" swarm model in n-dimensional space introduced in an earlier paper. In that model, motion of every swarm member is governed by predefined inter-individual interactions. Limitations of every member's field of view are also considered in that model. After that, we consider a general model for vehicle dynamics of each swarm member, and use emotional control theory to force their motion to obey the dynamics of the kinematic model. Based on the kinematic model, stability (cohesion) analysis is performed and coordination controller.is...
Physical properties and transmission spectrum of the WASP-80 planetary system from multi-colour photometry â
, Article Astronomy and Astrophysics ; Volume 562 , February , 2014 ; ISSN: 00046361 ; Southworth, J ; Ciceri, S ; Dominik, M ; Henning, T ; Jorgensen, U. G ; Lanza, A. F ; Rabus, M ; Snodgrass, C ; Vilela, C ; Alsubai, K. A ; Bozza, V ; Bramich, D. M ; Calchi Novati, S ; D'Ago, G ; Figuera Jaimes, R ; Galianni, P ; Gu, S. H ; Harpsoe, K ; Hinse, T ; Hundertmark, M ; Juncher, D ; Kains, N ; Korhonen, H ; Popovas, A ; Rahvar, S ; Skottfelt, J ; Street, R ; Surdej, J ; Tsapras, Y ; Wang, X. B ; Wertz, O ; Sharif University of Technology
Abstract
WASP-80 is one of only two systems known to contain a hot Jupiter which transits its M-dwarf host star. We present eight light curves of one transit event, obtained simultaneously using two defocussed telescopes. These data were taken through the Bessell I, Sloan g and near-infrared JHK passbands. We use our data to search for opacity-induced changes in the planetary radius, but find that all values agree with each other. Our data are therefore consistent with a flat transmission spectrum to within the observational uncertainties. We also measure an activity index of the host star of log R 'HK =-4.495 log R HK ′ =-4.495, meaning that WASP-80 A shows strong chromospheric activity. The...
High-precision photometry by telescope defocussing - VI. WASP-24, WASP-25 andWASP-26*
, Article Monthly Notices of the Royal Astronomical Society ; Volume 444, Issue 1 , 26 July , 2014 , Pages 776-789 ; ISSN: 00358711 ; Hinse, T. C ; Burgdorf, M ; Calchi Novati, S ; Dominik, M ; Galianni, P ; Gerner, T ; Giannini, E ; Gu, S. H ; Hundertmark, M ; Jorgensen, U. G ; Juncher, D ; Kerins, E ; Mancini, L ; Rabus, M ; Ricci, D ; Schafer, S ; Skottfelt, J ; Tregloan Reed, J ; Wang, X. B ; Wertz, O ; Alsubai, K. A ; Andersen, J. M ; Bozza, V ; Bramich, D. M ; Browne, P ; Ciceri, S ; D'Ago, G ; Damerdji, Y ; Diehl, C ; Dodds, P ; Elyiv, A ; Fang, X. S ; Finet, F ; Figuera Jaimes, R ; Hardis, S ; Harpsoe, K ; Jessen Hansen, J ; Kains, N ; Kjeldsen, H ; Korhonen, H ; Liebig, C ; Lund, M. N ; Lundkvist, M ; Mathiasen, M ; Penny, M. T ; Popovas, A ; Prof, S ; Rahvar, S ; Sahu, K ; Sharif University of Technology
Abstract
We present time series photometric observations of 13 transits in the planetary systems WASP-24, WASP-25 and WASP-26. All three systems have orbital obliquity measurements, WASP-24 andWASP-26 have been observed with Spitzer, andWASP-25 was previously comparatively neglected. Our light curves were obtained using the telescope-defocussing method and have scatters of 0.5-1.2 mmag relative to their best-fitting geometric models. We use these data to measure the physical properties and orbital ephemerides of the systems to high precision, finding that our improved measurements are in good agreement with previous studies. High-resolution Lucky Imaging observations of all three targets show no...