Sharif Digital Repository

Zero knowledge proofs allow a person (prover) to convince another person (verifier) that he has performed a specific computation on a secret data correctly, and has obtained a true answer, without having to disclose the secret data. QAP (Quadratic Arithmetic Program) based zkSNARKs (zero knowledge Succinct Non-interactive Argument of Knowledge) are a type of zero knowledge proof. They have several properties that make them attractive in practice, e.g. verifier's work is very easy. So they are used in many areas such as Blockchain and cloud computing. But yet prover's work in QAP based zkSNARKs is heavy, therefore, it may not be possible for a prover with limited processing resource to run... 

One of the most important characteristics of us humans is that we are homofaber beings, and with the help of technology we transform our living conditions, and perceptions of ourselves and the world. Technology, then, plays and important role in all branches of philosophy, and especially in philosophy of science. Without, technological instruments, little scientific research can be found that can be accomplished. Many of the processes involved in scientific researches, such as experimentation and measurement, are rooted in technology. This thesis aims to examine how technology impacts science. Philosophers and historians of science have usually paid little attention to the influence of... 

One of the main issues of business world is competition and competitiveness, and this cannot be happened unless one company absorb new ideas and innovations. Based on what scholars mentioned, companies should utilize users instead of professionals in order to create new innovations, and this is due to that users have better understanding of what users want. As a result, in the mobile platforms, platform owners need to know how to invoke users to create more innovative apps. In this research we were into finding important matters that increase number of innovation of users. We saw that lead-userness, toolkit support, work method autonomy, knowledge sharing, and modularity have an impact on... 

One of the features of a project is its uniqueness, if two sets of activities are the same neither of them will longer be included in the project definition. A method in two projects with the same nature may yield inverse results of each other. Therefore, it is necessary to study the parameters affecting the project carefully before any action. So far, some research has been conducted in this area and it has been tried to perform case study on qualitative and quantitative parameters of the project. By investigating a number of common factors in most civil engineering projects, especially megaprojects, the present study attempts to identify and examine exquisite and effective parameters and... 

One of the biggest challenges in software companies is reaching a common understanding between staff members across the organization with different expertise. If not solved, this problem could cause other organizational problems, such as project failures, lack of innovation in new products, organizational conflict, and even interppersonal conflicts between employees and/or managers. Recent research has shown that boundary objects can help decrease knowledge gaps between workers.This research reviews boundary objects’ properties, life cycle, and effects by investigating some boundary objects in a startup software company. This research’s goal is to increase the knowledge about boundary... 

Semantic segmentation is the tash of labeling each pixel of an input image. It is one of the main problems in computer vision and plays an important role in scene understanding. State of the art methods of solving it are based on Convolutional Neural Networhs (CNNs). While many real world tasks like autodriving cars and robot navigation require fast and lightweight models, CNNs inherently tend to give beter accuracy when they are deeper and bigger, and this has raised interest in designing compact networks. Knowledge distillation is one of the popular methods of training compact networhs and helps to transfer a big and powerful network’s knowledge to a small and compact one. In this research... 

In this research, the concept of new service development for Hotel industry is considered. As the concept of new service development encounters both business model structures and the required analysis for validation, the thesis has used the axiomatic design theory to evaluate the required service elements. Axiomatic Design framework as a scientific base for every type of design consists of 4 domains. The first domain named customer domain is the starting point at this research. In order to be prepared for applying in a real case study, customer domain is investigated and analyzed through a business model Canvas with nine building blocks covering all necessary and effective domains in a... 

Knowledge graphs are structured data sources which are widely used in the information process techniques. There are general and specialized knowledge graphs out there. These graphs will be used as the kernel of future search engines. Due to the lack of proper and tested Persian knowledge graphs, a method for knowledge graph extraction from news sources of the web has been introduced in this research.A knowledge graph extraction system from the unstructured web sources has been implemented in this research. In order to achieve this, a training dataset for the classifier was first extracted from semi-structured data of Wikipedia pages. At that time sentences were extracted from the... 

Technological capabilities as one of the growth’s aspects in developing countries have gained focus for research in last years. This study attempt to analyze the pattern of technological capabilities in four different sectors including Optic, Aerospace, Pharmaceutical and Biotechnology. In each sectors four Iranian companies as the case studies are selected. After deep interviews with key people in each company, required data is gathered. Data in each company is analyzed. The results of analysis for companies in one sector are gathered for analyzing each sector. In order to evaluate technological capabilities, the time required to improve, lead-lag relationship for gaining higher levels of... 

The unprecedented growth of information and communication technologies has an enormous impact on the productivity of organizations and influences all aspects of organizational operations. However, the absence of research which is required to guiding information systems development through process view and from developing companies' perspective, is evident. Moreover, due to the time interval between the development of an information system in a wide range of customer organizations and due to the intangibility of the information system, it is hardly possible to understand the success of development process. On the other hand, in most information systems development companies, the process of... 

Researchers recently have focused on integrating motivation and commitment models and presenting common models. This research, for the first time, presents an integrated model of motivation (Self-Determination Theory) and commitment (Three Component Model of Meyer and Allen), from a person-centered view. This study was carried out using two-step cluster analysis method including hierarchical method and optimization of the profiles distance on 306 knowledge workers of four Iranian organizations. The results reveal four profiles, named, based on their characteristics, "people with diverse and mild motives", "motivated individuals with mild intrinsic motives", "motivated people with mild... 

Vocabulary knowledge has been scrutinized by many researchers from different aspects and its impact on reading comprehension has made some controversies. This study was an attempt to investigate the impact of depth and breadth of vocabulary knowledge on reading comprehension. Actually, the relationship among different aspects of vocabulary: depth and breadth and their relationship with participants’ reading comprehension was investigated. To meet this end, Vocabulary Size Test (VST) and Word Associates Test (WAT) and reading comprehension tests were administered to 94 male and female students at Sharif University of Technology in Iran. To homogenize the participants, they were classified... 

The study of the religious experience is always one of the most important topics in researches related to the religion field. Religious and mystical experiences have always been one of the key religious concepts. The religious experience, like other human experiences, always comes with reactions in the human brain. Study of the religious experience from a neuroscience perspective can help us to answer questions and issues in the field of religious experience and cognitive credit of it. Assessment of what happens in the people’s brain during rituals like meditation or deep concentration provides a good window into understanding of what this means for people, being mystical or religious or... 

Innovative applicable ideas, are driving engine for technological enhances (developments), that are made in mind of entrepreneurs, inventors, and initiators; and with their serious follow up in the form of new business, reaches to successful outcome and the concept of entrepreneurship commences. But most of these entrepreneurs are brainy young graduates without experience in three main factors for success that is, management knowledge and experience, sufficient financial resources, connection with market and customer in competitive market. Nowadays venture capitals who lean over their precious intuition, with accepting computable or incomputable risks, actively accompany entrepreneurs and... 

The present survey study aims at investigating and comparing risk indices in highway and freeway projects implemented through Build-Operate-Transfer (BOT) and Design-Bid-Build (DBB) delivery methods. In this regard, two distinct questionnaires were developed (one for BOT and one for DBB delivery method) and interviews were conducted, too. The questionnaires were, then, sent to the target population, i.e. all the experts and agents involved in highway and freeway construction projects implemented through either BOT or DBB method. The collected data were then submitted to Statistical Package for Social Sciences (SPSS), version 22.00, to be analyzed. The results showed that risks had generally... 

Project Management has clearly designed to achieve a successful outcome of the projects. However, without a proper practicing, it might convey a different result. Companies are increasingly using organizational project management in their work to achieve company goals. The purpose of this study is to identify the challenges in Iran for successful implementation of directorial patterns based on the PMBoK (Project Management Body of Knowledge) and PRINCE2 (PRojects IN Controlled Environment-2nd Version). This paper presents the results of a study aiming at investigating the impacts of implementing project management processes of PMBOK and PRINCE2 and themes within Iranian construction... 

The purpose of this study is to investigate and analyse the technological transition of a new clean energy technology in the market. The agent-based modeling is used in national innovation chain to describe knowledge spillover between main actors in innovation procedure in order to attain renewable energy technology (RET) from basic research to commercial stage. Government’s expenditure on training human resource and R&D activities is modeled as a tool to analyse the development of innovation chain in order to increase diffusion rate of the new technology. Application of the knowledge flow model is demonstrated through analysis of introduction of solar PV in the energy system of Iran and... 

It has been five years since the new education system was started, according to which fundamental changes have been applied to school text books. The mentioned changes in the text books are based on “the fundamental transformation document” and “Iran’s national educational curriculum”. In “Iran’s national educational curriculum”, eleven fields concerning pedagogy and learning are explicitly mentioned; one of these eleven fields is “training and learning work and technology”. One of the merits which has been stressed in this field, is “technological thinking”. Nowadays, methods of extending and reinforcing the technological thinking have come to be the subject of investigations in many... 

In the present era, data and its impressive access is considered to be one of the key elements in development, in a way that all social, economic process, severly require information. Today knowledge is the most important tool in competition of present and future markets. Implementation of knowledge management should be accomplished in a step by step process. One of the main goals of implementing knowledge management is increasing of the organizational productivity. This study has a qualitative approach and the method is based on a case study. Data has been collected by questionnaires. Due to this fact, knowledge management should be applied according to organizational productivity. Among... 

The increasing significance and deployment of knowledge management(KM) is the main reason for selecting the topic of this research. This research tries to analyse the dimensions and KM implementation methods in press section of maintenance department in Saipa company. This study has a qualitative approach and the method is based on a case study. Data has been collected by questionnaires. Two questionnares have been provided in this research and distributed among different staff of press section in maintenance department. The concept of knowledge management maturity is applied and the goal of first questionnaire is based on this concept. The level of KM maturity is assessed via this...