Sharif Digital Repository

The goal of the research presented in this thesis is removing noise from electrocardiogram (ECG) signals. The electrocardiogram is a test that measures the electrical activity of the heart. The information obtained from an electrocardiogram can be used to diagnose different types of heart disease. It may be useful for seeing how well the patient is responding to treatment. The extraction of high resolution ECG signals from noisy measurements is among the most tempting open problems of biomedical signal processing. Extracting useful clinical information from the real (noisy) ECG requires reliable signal processing techniques. Numerous methods have been reported to denoise ECG signals based on... 

Zinc–silicanano-composite coatings were produced by successive dip coatand sintering procedure from different sol-gel solutions. The surface and cross-sectional morphologies of Zn-SiO2 nano-particles (NPs) were examined using field emission scanning electron microscopy (FE-SEM). Corrosion resistance evaluated by means of polarization and electrochemical impedance spectroscopy showed that even thin films of Zn-SiO2 in orders of 200 nm can have corrosion rates as low as conventional hot dip galvanized steels. Multi-layers coatings have been studied and showed that 10 layers coating with the thickness of 2m has the lowest corrosion rate with the passive region in anodic branch. Corrosion... 

Facility location decisions play a prominent role in strategic planning of many firms, companies and governmental organizations. Since in many real-world facility location problems, the data are subject to uncertainty, in this thesis, we consider the P-center problem under uncertainty of demand nodes. Using Bertsimas and Sim approach, we modeled the problem as a linear optimization model. Furthermore, we develop a tabu search algorithm to solve the problem. Finally we designed some experiments to adjust the parameters of tabu search algorithm. We presented the numerical result accordingly  

Feyarabend’s philosophy of science is against method and rule such that he believes that “anything goes”. However, he sometimes applies the term “progress”. Reviewing his publications shows that from his point of view, progress is qualitative and relative. So, unlike other philosophers of science Feyarabend ignores the clarification of the concept; subsequently, his applications of the term “progress” are somewhat ambiguous. However, by studying his philosophy, one may realize what should be done to achieve progress in any sense. The affirmative aspect of Feyerabend’s philosophy, while highlights the social and ethical elements, considering his humanitarian outlook as well as his special... 

In this thesis, I study the concept of social ethics from a modern point of view. What I call modernity, is the fundamental philosophical revolution happened in the sixteenth and seventeenth centuries in Europe, this period is called “Enlightenment”, what I assume is from Machiavelli to Kant. One of the most important philosophers belongs to this enlightenment period is Thomas Hobbes, a Scottish philosopher whose main book “Leviathan” is well-known as the basis of the modern politics. Modern politics makes sense against classical one, founded by Aristotle in a book mentioned under the same title. What Hobbes describes as society based on public interests etc. is in a different point of view... 

Cultural and social problems in the modern age have motivated many thinkers to analyze modernity. Some of them have tried to solve these problems and, if possible, prevent their occurrence in the future. Proposed solutions are mostly dystopian, i.e. by being disappointed, they think the only possible way to overcome these problems is to annihilate modern civilization, or they pursue a passive approach; i.e. they have accepted the problems of modernity but only seek a way to mitigate its challenges. Among these, solutions which try to make use of the capacities of the modern civilization, especially emerging technologies, are really scarce. These approaches seek to realize (and make... 

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... 

Client applications are often developed with the help of software frameworks in order to reduce the development costs and to increase the software quality. However, frameworks may evolve to add new features or to fix bugs, and thus, their APIs may change at the same time. Nevertheless, these API changes can cause the client applications to not work properly. New frameworks typically use the deprecation mechanism to reduce this effect, but their documents often do not provide sufficient information. Consequently, deprecated APIs usages remain unresolved in client applications. To tackle this issue, we introduce ARFES (Automated Recommender of Framework Evolution Solutions) that provides... 

Religious science, its nature, possibility, and the mechanism of achievement have come to the fore in recent years. In this thesis, Javadi Amoli’s and Golshani’s theories are compared in this respect. Javadi Amoli begins by situating the reason, and certain knowledge as its product, in the architecture of religious knowledge. Since this kind of knowledge unveils divine action, Amoli counts it as already divine in nature. Therefore, there would be no conflict between science and religion in principle, unless atheist scientists insist on drawing non-empirical conclusions from sciences. Other conflicts too are superficial and resolvable. Amoli sees the fault of current sciences, which should be... 

The purpose of writing this thesis is to arrive at the concept of civilization. And in this process, using the constructive perception. My approach in constructive perception is different with approach of Allameh tabatabaei in constructive perception. In first chapter defining constructive perception as the perception that mind by analogy between two consepts makes the non-real relations and attributes it deliberated to the reality (the parties). Meanwhile, should have been constructive perception is the intermediary that stimulation our sense abut reality. These feelings can be tenderness or hatred or fear and hope and ... . In the second chapter we will show that the use of technology... 

With the expansion of industry, steel to copper joints applications in heat and electricity transmission equipment have increased. Steel has better mechanical properties and weldability and lower prices, and copper has better thermal and electrical conductivity properties; because of that, this dissimilar joint fits needs such as cost reduction and high efficiency. This study has parametrically investigated the feasibility of dissimilar welding of these metals using the resistance spot welding process.This study conducts three phases. In the first phase, low carbon steel and copper were directly welded, and it was found that the mechanical properties of the joint were affected by physical... 

In this research, synthesis, structural and theoretical studies of new rhenium (I) tricarbonyl complexes with general formula, [Re(CO)3(NN)X] in which NN´ is chelating bidentate diimine ligand and X = Perrhenate, NO2 and ONO ligands were studied. The synthesized complexes were characterized by 1H-NMR, FT-IR and ESI-mass spectroscopic methods and their solid state structures were determined by X-ray diffraction analysis. Crystal structure determination by single-crystal X-ray diffraction allows us to fully examine the intramolecular and intermolecular interactions. The energy of different n → π* interactions also was investigated. Since three carbonyl groups are present in these complexes, we... 

This article investigate about Susan George’s ideas concerning the relation of religion and technology and examine her point of view. George, searches synergy between religion and technology and tries to develop basis of artificial intelligence by religion. She provide answers to some philosophical concerns about technology through religion and tries to prove that technological morality needs religion. We show that some of her Assumptions is not through her conclusions. George, notices to the help of technology to religion for providing a new expression. We examine her clams about relation between technology and Islam