Examining the Factors Impacting the Improvement of Brand Meaning for Airlines

, M.Sc. Thesis Sharif University of Technology Pakdaman, Kamyar (Author) ; Karami, Naser (Supervisor)

Abstract

Today, many organizations have come to believe that one of their most valuable assets is their product and/or service brands. In today's complex and challenging world, we are all faced with increasing options and decreasing time for decision making and making our choices. On this basis, the ability of brands to simplify decision making for customers, reduce risks and define expectations for them is invaluable. In recent decades, the issue of branding has become an important part of business strategy. Branding plays an important and special role in service organizations, because powerful brands have a significant impact on customers' decisions and perceptions of the brand. In this research,...

The Effects of Customer Knowledge Management on Organizational Growth: Mediating Role of Organizational Innovation

, M.Sc. Thesis Sharif University of Technology Zamani, Pouran (Author) ; Karami, Naser (Supervisor)

Abstract

In today’s world startups are receiving attention as they play a key role in economic growth and employment in different countries. On the other hand, globalization, rapid change and fierce competition have made the economy more knowledge-based, and this issue has become so special for startups that the main asset of startups can be considered their knowledge capital, including customer knowledge. Considering the role of knowledge in innovation and innovation in the growth and survival of a startup, customer knowledge can be considered an important source for innovation in the startups and also a vital factor for their survival. The purpose of this study is to study the effect of customer...

The Investigation of the Forecast of Rail-Passenger Transport Ticket Reservation Demand

, M.Sc. Thesis Sharif University of Technology Kazemi Asl, Ali (Author) ; Karami, Naser (Supervisor)

Abstract

Demand estimation has always been one of the most important components of marketing in all industries. Because the profitability of any organization depends on the demand for the product or service that the organization offers to the market. On the other hand, in order to optimize the performance of the organization and better planning, we need to have an estimate of demand in order to avoid wasting the available facilities by optimally allocating resources. Another issue that shows the importance of demand estimation is the dependence of optimal pricing on the amount of demand, which can be said to be the most important tool of the organization to manage its revenue. Optimal pricing can be...

A Study of Factors Influencing the Startup Marketing Strategy

, M.Sc. Thesis Sharif University of Technology Javanshir Estiar, Amin Reza (Author) ; Karami, Naser (Supervisor)

Abstract

Small and medium-sized businesses in all countries are an important part of the economy, but are strongly affected by rapid changes in the external environment, especially demographic and economic. These rapid changes are affecting the marketing of these businesses to meet customers' needs and expectations in order to maintain a competitive position in the market. Startups, as a group of small and medium-sized businesses, are no exception and are affected by the changes. To respond to these changes startups need to have a proper marketing strategy in order to survive failure in this dynamic environment. The marketing strategy of these organizations is different from the marketing strategy...

Evaluating the Effect of Marketing Measures on the Performance of Companies Listed on the Iranian Stock Exchange

, M.Sc. Thesis Sharif University of Technology Ghara’ei Khezripur, Mohammad Reza (Author) ; Karami, Naser (Supervisor)

Abstract

The issue of spending companies' resources on marketing measures, due to the lack of a proper mechanism to explain the impact and role of these measures has always been one of the most challenging problems for many stakeholders of companies, especially managers. In this study, we have tried to explain the relationship between marketing costs and credit policies with the financial performance of companies by examining the information published by companies listed on the Tehran Stock Exchange. In this study, the required information was collected from the sources of valid tools and then, using statistical methods, regression models that express the relationship between variables were...

Reviewing and Analyzing the Political Marketing Program of Candidates for Parliamentary Elections on Social Networks (Twitter and Instagram) in Parliamentary Elections

, M.Sc. Thesis Sharif University of Technology Khiabani, Milad (Author) ; Karami, Naser (Supervisor) ; Honarvar, Ruhollah (Supervisor)

Abstract

With the emergence and expansion of social media in the societies, these media has become an integral part of modern society and the lives of citizens. These networks have improved communication facilities in the community and created an opportunity for politicians to use these media as a communication and marketing channel to communicate with citizens and use them to achieve their goals. Social media's ability to communicate has put politicians' relationship with citizens in a very strategic position. This has made it important to have a communication plan and, more generally, principled political marketing.Therefore, the main issue that this dissertation has investigated is the review of...

Studying the Factors Affecting Customer Satisfaction and Customer Loyalty from Customer Relationship Management Plans: Case of IranKhodro Company

, M.Sc. Thesis Sharif University of Technology Sadeghi Dowlatabadi, Amir Hossein (Author) ; Sepehri, Mehran (Supervisor) ; Karami, Naser (Co-Advisor)

Abstract

Results showed that 9 factors of “Brand Equity”, “Product Quality”, “Service Quality”, “Service Recovery”, “Perceived Value”, “Relationship”, “Employee Satisfaction”, “Physical Environment” and “Distribution Channel” are most effective factors by researchers that have effect on customer satisfaction. Thus, the Macromodel of this research was designed based on these factors. Due to limitations and context of the research, “Service Quality”, “Service Recovery” and “Relationship” were chosen in the final model. Results of questionnaire showed that the 5 parameters of “Service Recovery Speed”, “Reliability”, “Responsiveness”, “Empathy” and “Seller-focused antecedents” was the most important...

Synthesis of TiO2 nano powder by the sol-gel method and its use as a photocatalyst

, Article Journal of the Iranian Chemical Society ; Volume 7, Issue SUPPL. 1 , 2010 , Pages S154-S160 ; 1735207X (ISSN) Karami, A ; Sharif University of Technology

2010

Abstract

In this work the titanium dioxide powder was prepared by the optimized and simple Sol-Gel method and then characterized. The gelling pH was set to values of 3 (TiO2-A), 7 (TiO2-N) and 9 (TiO2-B) to observe the effect on the properties of the material. In these three cases nanoparticulated materials were obtained with particle sizes between 10nm and 20nm. The larger surface areas were obtained at pH 3, which is several times larger than the others. Furthermore, with the gelling condition pH 3, it was possible to synthesize pure anatase phase titania. Some preliminary results on the test of the photocatalytic activity of the synthesized materials in the reduction of nitric oxide are presented....

Study on modification of colloidal silica surface with magnesium ions

, Article Journal of Colloid and Interface Science ; 2009 , Pages 379-383 ; 00219797 (ISSN) Karami, A ; Sharif University of Technology

2009

Abstract

The prepared colloidal silica via ion exchange was modified by adding Mg+2 ions in the surface growth process of colloidal silica. The particle size of the modified colloidal silica was decreased by increasing the seed concentration, whereas that of colloidal silica was slightly increased as the seeds concentration exceed 15 wt%. But the trend of changes in surface area was completely reversed. Magnesium ions on surface of the modified colloidal silica were identified by the measurement of energy-dispersive X-ray spectrometry (EDS). After modifying with Mg+2 ions, the iso-electric point (IEP) of colloidal silica in pH ∼ 2 without modification, disappears over the whole pH range. © 2008...

The influence of chromium substitution on an iron-titanium catalyst used in the selective catalytic reduction of NO

, Article Journal of Catalysis ; Volume 292 , August , 2012 , Pages 32-43 ; 00219517 (ISSN) Karami, A ; Salehi, V ; Sharif University of Technology

Elsevier 2012

Abstract

A series of Cr-substituted Fe-Ti compounds were prepared by the co-precipitation method and were systematically investigated as catalysts for the selective catalytic reduction (SCR) of NO by NH 3. A variety of analytical techniques revealed that the Cr substitution amount affects the N 2 selectivity, SCR activity, redox behavior of NH 3/NO x, adsorption ability, and structure of catalysts in terms of surface properties, porosity, mobility of lattice oxygen, oxidative ability of Cr species, ratio of Bronsted acid sites and Lewis acid sites, NO x adsorption capacity, and structural disorder and distortion. In a series of Fe aCr 1-aTiO x (a = 1, 0.75, 0.5, 0.2, 0) catalysts, Fe 0.5Cr 0.5TiO x...

Numerical modeling of incline plate LiBr absorber

, Article Heat and Mass Transfer/Waerme- und Stoffuebertragung ; Volume 47, Issue 3 , November , 2011 , Pages 259-267 ; 09477411 (ISSN) Karami, S ; Farhanieh, B ; Sharif University of Technology

2011

Abstract

Among major components of LiBr-H 2O absorption chillers is the absorber, which has a direct effect on the chillier size and whose characteristics have significant effects on the overall efficiency of absorption machines. In this article, heat and mass transfer process in absorption of refrigerant vapor into a lithium bromide solution of water-cooled incline plate absorber in the Reynolds number range of 5

A numerical study on the absorption of water vapor into a film of aqueous LiBr falling along a vertical plate

, Article Heat and Mass Transfer/Waerme- und Stoffuebertragung ; Volume 46, Issue 2 , 2009 , Pages 197-207 ; 09477411 (ISSN) Karami, S ; Farhanieh, B ; Sharif University of Technology

2009

Abstract

Absorber is an important component in absorption machines and its characteristics have significant effects on the overall efficiency of absorption machines. This article reports a model of simultaneous heat and mass transfer process in absorption of refrigerant vapor into a lithium bromide solution of water - cooled vertical plate absorber in the Reynolds number range of 5 < Re < 150. The boundary layer assumptions were used for the transport of mass, momentum and energy equations and the fully implicit finite difference method was employed to solve the governing equations in the film flow. Dependence of lithium bromide aqueous properties to the temperature and concentration and film...

Improvement of dry sliding tribological properties of polyamide 6 using diamond nanoparticles

, Article Tribology International ; Volume 115 , 2017 , Pages 370-377 ; 0301679X (ISSN) Karami, P ; Shojaei, A ; Sharif University of Technology

Elsevier Ltd 2017

Abstract

In the present study, it was revealed that incorporation of nanodiamond containing carboxylic group (ND-COOH) decreased considerably specific wear rate (∼30%) and COF (∼60%) of polyamide 6 (PA6) at 1 wt% loading. Compared with ND-COOH, amino functionalized ND enhanced further wear performance of PA6 which was associated with its finer dispersion as well as greater influence on the improvement of mechanical properties, toughness and crystallinity of PA6. Surface temperature increment caused by frictional heat was in close agreement with COF and wear characteristics of the samples. Optical microscopy images revealed that NDs promote the abrasive wear mechanism in PA6/ND composites. © 2017...

Morphological and mechanical properties of polyamide 6/nanodiamond composites prepared by melt mixing: effect of surface functionality of nanodiamond

, Article Polymer International ; Volume 66, Issue 4 , 2017 , Pages 557-565 ; 09598103 (ISSN) Karami, P ; Shojaei, A ; Sharif University of Technology

John Wiley and Sons Ltd 2017

Abstract

Surface chemistry of as-received nanodiamond (ND) was first tailored by dry thermal oxidation to obtain carboxylated ND (ND-COOH) and by wet chemistry to obtain ethylenediamine-functionalized ND (ND-EDA). Then, the surface-functionalized ND particles were dispersed in polyamide 6 (PA6) using the melt-mixing method. Transmission optical and scanning electron microscopies indicated a fine dispersion at low nanodiamond concentrations, e.g. 0.25 wt%, particularly with ND-EDA. Differential scanning calorimetry revealed that ND-EDA favoured the α-phase crystal and enhanced the degree of crystallinity of PA6. Experimental data indicated that ND-EDA had considerably improved tensile properties at...

Smooth residual generation for robust isolation of faults in manipulators using joint torque sensors

, Article 58th IEEE Conference on Decision and Control, CDC 2019, 11 December 2019 through 13 December 2019 ; Volume 2019-December , 2019 , Pages 2922-2927 ; 07431546 (ISSN); 9781728113982 (ISBN) Karami, S ; Namvar, M ; Sharif University of Technology

Institute of Electrical and Electronics Engineers Inc 2019

Abstract

Reliability of model-based failure detection and isolation (FDI) methods depends on the amount of uncertainty in a system model. Recently, it has been shown that the use of joint torque sensing results in a simplified manipulator model that excludes hardly identifiable link dynamics and other nonlinearities. We present a geometric approach to fault detection and isolation (FDI) for robotic manipulators using joint torque sensor in presence of model uncertainty. A systematic procedure is introduced for representing a robotic system model using joint torque sensor being affine with respect to faults and disturbances. The proposed FDI filter has smooth dynamics with freely selectable functions...

A geometric approach to fault detection and isolation in robotic manipulators

, Article Proceedings of the IEEE Conference on Decision and Control, 17 December 2018 through 19 December 2018 ; Volume 2018-December , 2019 , Pages 391-396 ; 07431546 (ISSN); 9781538613955 (ISBN) Karami, S ; Namvar, M ; Sharif University of Technology

Institute of Electrical and Electronics Engineers Inc 2019

Abstract

We present a geometric approach for fault detection and isolation (FDI) in robotic manipulators in presence of model uncertainty. A systematic procedure is introduced for representing robotic system model being affine with respect to faults and disturbances. The proposed residual generator has smooth dynamics with freely selectable functions and it does not require high gains or threshold adjustment for the FDI purpose. No assumption on amplitude of faults and their rate is used. The solvability conditions for the FDI problem lead to a quotient observable subspace unaffected by all unknown inputs except the faults. Simulation example demonstrates localization of faults in presence of...

Comparing the Besancon Galaxy Model with Hipparcos data

, M.Sc. Thesis Sharif University of Technology Karami, Mansour (Author) ; Rahvar, Sohrab (Supervisor)

Abstract

e H-R diagram for stars within 100 parsecs from the sun were simulated using Padova isorones, Besanc¸on Galaxy disc model and various star formation rates. using Chi-square test the different star formation rates were compared. the results favours an increasing star formation rate

Positioning, Tracking and Shape Control in Micro-Beams Via Electrostatic Actuators and Incomplete State Feedback

, M.Sc. Thesis Sharif University of Technology Karami, Farzad (Author) ; Salarieh, Hassan (Supervisor)

Abstract

Systems that are electrostatically actuated have found a vast role in MEMS application. This technology is used in optical systems, sensors, micro switches, and deformable mirrors. Raising the use of these systems in fields that needs better performance highlighted the need to accurate study of dynamics and control of electrostatic actuated systems in micro scale. This work is dedicated to design of an estimation and control system for a micro-beam that is actuated by electrostatic. After a comprehensive survey on pervious works that are done on dynamic, applications, fabrication and control of these systems dynamic of the system is fully derived. The environmental factors like fringing...

3D Reconstruction of Football Player Using Multi-view Videos

, M.Sc. Thesis Sharif University of Technology Karami, Mansoureh (Author) ; Kasaei, Shohreh (Supervisor)

Abstract

One major problem in sport match analysis and interpretation is that there are restricted viewpoints of the game. 3D reconstruction allows us to have virtual replay from any viewpoint so that the events such as penalties can be detected easily. For achieving this purpose, we use many cameras with overlapped views that cover almost all parts of the field. After some preprocessing, 3D reconstruction and texture mapping, we can enhance the viewer experience by having arbitrary viewpoint of the match. In this research, we use two different visual hull methods for 3D reconstruction. In the first method, the visual hull of an object is computed efficiently and robustly from image contours. This...

Designing a Multi-Model Sliding Mode Controller for a Magnetic Levitation System

, M.Sc. Thesis Sharif University of Technology Karami, Sasan (Author) ; Haeri, Mohammad (Supervisor)

Abstract

In this project a complete simulator for a two-winding, 25cm air gap Maglev system by considering the pratical constaritns, position and velocity observer and the current sensor dynamics was derived. In order to control the ball in any desired position a twisting sliding mode controller was designed as the basic controller in the rest of project. The designed controller can not transfer the ball in far trajectory. In first step we modify that to reach a better performance by changing the value of current, passing through the coils in steady state. In the second step, the far trajectories are divided to a finite number of sub-trajectory such that the ball can pass these sub-trajectory by...