Sharif Digital Repository

Of prime importance for renewable energy development, supercapacitors have always been on the cutting edge from the merit of superior power densities and long-cycle stability. Integrating the well-matched electrochemical properties of electroactive materials alongside the great chemical and mechanical features of flexible substrates is considered the main point in developing high-performance electronic devices. Nowadays, advanced nanocomposites have attracted more attention boosting energy densities, ensuring durability, and overcoming unbalanced ion capturing in asymmetric supercapacitors (ASCs). Carbon materials altered using transition metal compounds benefited from the synergic effect of... 

Application of canard next to the wing have been widely used in military industry for decades. Although it’s most application is in supersonic flying objects, It has to do it’s duty in lower air speeds too. The aim of this study was to investigate the influence on the wing due to the presence of canard in supersonic flow regime. But because of the importance of the issue, significant attempts has been conducted in subsonic flow regime. High research volume, Absence of a comprehensive theory in this branch and the local defense industry demand as a developing country on the other hand, delivers the importance and applicability of the subject. Another issue of importance is that the... 

Electricity has been known as one of the humans’ essential needs. The emergence of a competitive environment in most aspects of humans life and its considerable impact on the economic system in recent years has promoted this idea that the electricity should be traded as a commodity. In this business, the competition has been based on the convenient access for subscribers, and the exclusive electricity environment has became a competitive environment. Therefore, new roles have emerged. These roles take place in the direction of generation, transmission and distribution of electrical energy with the aim of improving them. Retailer is one of the emerged roles for restructuring in the field of... 

One of problemsin an inverse problem like history matching is there is no unique solution. This means that maybe several diferent permeability maps can correctly reproduced the history of fieldt but there is no garanttee that these maps accurately predidct reservoir production behavior. One way to face and deal with this problem, except manipulation of solution and optimization algorithm (inverse modeling) is to use other data sources like seismic data, Variogram, pore volume, and fracture density or any other parameter obtained from geostatistical investigations.Multi-resolution wavelet analysis can be an appropriate tool to gather the necessary information to characterize the inverse model... 

Human joints wear gradually by diseases like arthrosis and will fail. The Pain from joint erode, preventing tracking daily activities, wont disappear by medicines and joint replacement is a common treatment. Hip joint as one of the most important, largest and heaviest joints of the body,is no exception.
Over 600,000 worldwide annual hip replacement surgery is done. The joints are designed in such a way that it can move 15 years without significant wear. Different materials such as ceramics, polymers and metals are used in making it which before in vivo use, itmust succeed many tests like wear test.
Since making artificial joints become increasingly important in recent years and... 

Dealing with complicated organizational situations in the current competitive and uncertain market requires making the best management decisions at the earliest time possible. As making the best decisions requires the possession of adequate and accurate knowledge, knowledge has become the most valuable asset of organizations. Knowledge Management (KM) spans managing the identification, capture, storage, sharing, usage and creation of knowledge. Using an appropriate Knowledge Management System (KMS) can ensure the provision of essential knowledge for decision making, and can manage the complexity of the competitive market by maintaining and managing the relevant organizational knowledge.... 

Design and parametric study of a coupled thermoacoustic refrigerator system has been carried out based on thermoacoustic theories. The purpose of coupled thermoacoustic refrigerator design is to cool a container with small dimensions for use in cold storage above zero. The application of this refrigerator is where the waste heat of piston engines of distributed generation (DG) plants can be used as energy input. The design is based on the simplicity and low cost of the refrigerator. Therefore, the engine and refrigerator part of the coupled thermoacoustic refrigerator is enclosed in a resonator with a fixed diameter, which is closed on both sides of the resonator. Two standing-wave... 

In today’s methodical corporate world, processes have been recognized as valuable organizational knowledge assets. Situational Method Engineering (SME) processes are considered particularly valuable because of their effectiveness in building context-specific software processes for developing efficient software systems; thus, they indirectly affect all software-dependent organizational knowledge assets, including organizational processes. It is therefore logical to deduce that managing SME knowledge would improve the efficiency of both SME and organizational processes. Unfortunately, existing SME processes suffer from weaknesses that are rooted in loss of knowledge within method engineering... 

People's lives have been affected by the spread of the Covid-19 virus. Due to the high infectivity, governments have screened people, imposed curfews, mandated the use of masks, and so on to reduce the rate of transmission of the disease among people. Meanwhile, infected people are getting treatments: people who are slightly affected are quarantined at home, and those who are heavily affected are treated in hospitals. Hence there is an excessive increase in the hospital workload. On the one hand, this increased workload leads to physical fatigue and, on the other hand, to psychological problems, stress, etc. for the healthcare professionals. Therefore, it is very important to take care of... 

Destruction of green lands, especially forests, is one of the most common forms of environmental degradation. Meanwhile, political institutions can play an important role in protecting or destroying the environment, especially forests. The creation of town and village councils as a change in political institutions and decentralization can have an impact on the environment. Land use change, implementation of development projects and the task of overseeing the implementation of environmental protection laws are among the duties and powers of councils that affect the coverage of various areas. At different eras, town and village councils’ elections have been annulled or dissolved in a... 

The exploration of bipedal robot locomotion is primarily motivated by a variety of sociological and commercial imperatives, such as the aspiration to substitute humans in hazardous occupations (e.g., mining, nuclear power plant inspections, military operations) and advancements in dynamic control for purposes like rehabilitation with robotic assistance and nerve stimulation. The complexity arising from a high number of degrees of freedom, intricate nonlinear dynamics, and persistent challenges in modeling ground interactions pose significant obstacles in the development of control strategies for bipedal systems. With the increasing integration of robots into diverse sectors like education... 

The aim of this study is to design a Zero Liquid Discharge (ZLD) treatment plant for mine effluent. For this purpose, wastewater from an iron ore mine was selected as a case study. Initially, recent studies on ZLD systems were reviewed, and a technically feasible process was designed to treat mine effluent with a ZLD approach. The designed process was then simulated using Aspen Plus software, and the results were utilized for an economic analysis. The simulation was performed under three design scenarios: (1) using external steam for energy supply, (2) utilizing waste heat, and (3) employing a steam compressor to superheat the saturated steam exiting the evaporative crystallizer and using...