Sharif Digital Repository

Electrostatic precipitators (ESPs) are widely recognized for their pivotal role in the collection of dust and particulate matter. ESPs are essential to ensure a particle- and dust-free atmosphere in industrial and non-industrial work environments. With the ever-increasing significance of maintaining air quality at the desired standards, the role of ESPs has gained paramount importance in mitigating airborne pollutants and protecting public health. Achieving higher collection efficiency for particulate matter and attaining cleaner air is of great importance in the design and selection of precipitators. On the other hand, particle collection efficiency is considered as a crucial factor for ESP... 

The role of government in economy has been a controversial subject in economics. Lately, there has been some fundamental change in evaluating this subject. One could mention two of these as 1) realizing the importance of micro-founded macro model for evaluating policy, and 2) taking into consideration the rent-seeking behavior of politicians. In this research, a general equilibrium in a micro-founded macro model will be discussed and then in political economics framework, the effect of government on this equilibrium will be investigated. Only the redistribution role of government has been considered. First, the model in which a benevolent government is seeking optimal policy is Discussed.... 

Due to important applications and benefits of mass transfer in engineering and especially in nano-scales engineering, nano-science researchers have focused on this field. Considerably, in classical fluid dynamics applications, the fluid can be transported using differential pressure gradient. But the classical methods require moving components, which are usually expensive and not applicable in nano-sizes. To avoid these problems in nano-size transportation, we can use electro-osmotic process to perform mass transfer in low transfer rates. In electro-osmotic process, we can move electrolyte solvent with the aid of an external electrical field. Due to importance of this process in... 

After using software development methodologies for decades, developers have realized that there is no general-purpose methodology that suits every project situation. The need for project-specific methodologies has resulted in the emergence of Situational Method Engineering (SME), which focuses on the construction/adaptation of a methodology according to the specific characteristics of the project at hand. In this approach, the first step is to precisely define the project situation and methodology requirements, based on which the target methodology will then be constructed. Requirements Engineering (RE) in SME is concerned with the elicitation, specification, modeling and validation of... 

Solid-State Disks (SSDs) offer advantages such as no mechanical parts, low power consumption, and constant read latency. SSDs, however, suffer from shortcomings such as erase-before-update requirement and limited endurance.Redundant Array of Independent Disks (RAID) are commonly used in storage servers to enhance performance and reliability. To further enhance system performance, one can employ efficient Input/Output (I/O) scheduling algorithms suitedto the disk structure in RAID-based systems.In this thesis, we present an I/O scheduling method to improve endurance and performance of SSD-based RAID systems. In the proposed I/O scheduling algorithm, read requests are sent directly to SSDs and... 

Urban mobility platforms introduced as an innovation in matching suppliers and demanders to each other in the transportation market in recent years. In this research, we applying synthetic control method to analyze the impact of this kind of platforms on labor market variables like work hours, income and number of employed persons in affected activity group. We use the ISIC correspondence tables for versions 3.1 and 4 and also Iran labor force survey and household survey to making activity control groups. The results show that work hours for main work in the related group were reduced. As well as the number of employees in the group increased 100 thousand people and the number of earners...