Journal of Mechanical Engineering and Vibration: 1 (1)

Open Access Article

1 - Path estimation of crack growth under multi-axial loading in a plate with center rectangular notch
Kazem Reza Kashyzadeh

In the present paper, the main purpose is estimated path of crack growth under multi-axial loading. So, used plate with a center rectangular notch that has an initial crack with 5 mm length and 〖-55〗^°angle. At the First, has been obtained stress intensity factors o More

In the present paper, the main purpose is estimated path of crack growth under multi-axial loading. So, used plate with a center rectangular notch that has an initial crack with 5 mm length and 〖-55〗^°angle. At the First, has been obtained stress intensity factors of failure mode I and II by using ABAQUS software. Next has been calculated equivalent stress intensity factor and estimated path of crack growth by using the maximum environmental stress method. This trend has been continued to finish failure. Manuscript profile

Open Access Article

2 - The Effect of Lifetime of Particles on the Casimir Energy
Madad Ali Valuyan

In this paper we investigate the Casimir energy for systems with the lifetime of particles. We believe that all of the scales that naturally appear in the formulation of the problem in terms of a lagrangian and the set of boundary conditions, as internal scales. We defi More

In this paper we investigate the Casimir energy for systems with the lifetime of particles. We believe that all of the scales that naturally appear in the formulation of the problem in terms of a lagrangian and the set of boundary conditions, as internal scales. We define all other scales such as lifetime of particles as external scales. One of the first effects of these external scales is the restrictions could be apply on the allowed modes in the zero point energy of a system. In this paper we show how these scales (for example the finite lifetime of particles) produce restrictions on the allowed modes, which alter the Casimir energy. We compare our results with those reported in the literature, which are invariably devoid of such scales, and show that the difference increases when the internal scales of the problem approach the external scales. In order to describe above effects, we use the generic and simple example of a massive scalar field confined between two points with Dirichlet boundary conditions in one spatial dimension. Manuscript profile

Open Access Article

3 - A Database for use in Intelligent Personality Recognition System
Vahid Ghods حوریه عربیان

Graphology is the science of the study of personality and individual characteristics based on the handwriting. Aware of this knowledge can be used of great in society. In this paper, a database is introduced for graphology of Farsi handwriting and intelligent personalit More

Graphology is the science of the study of personality and individual characteristics based on the handwriting. Aware of this knowledge can be used of great in society. In this paper, a database is introduced for graphology of Farsi handwriting and intelligent personality recognition.Database (including 140 samples of handwriting) was collected from two groups of students at the University of Applied Science and clients of Semnan prison. While getting an handwriting, participants were fill out personality inventory 71 questions MMPI in this study and 11 psychological parameters extracted from the questionnaire with each individual manuscript. The database can be used in research of Farsi handwriting graphology. Manuscript profile

Open Access Article

4 - Development of solar air collectors for drying applications
Mohammad Mehdi Ebn Ali Ali Heydary

In this study, three types of solar air collectors (flat plate, finned, and v-corrugated) have been experimentally investigated in order to achieve an effective design which can be appropriate for a solar dryer. The experiments have been performed according to the ASHRA More

In this study, three types of solar air collectors (flat plate, finned, and v-corrugated) have been experimentally investigated in order to achieve an effective design which can be appropriate for a solar dryer. The experiments have been performed according to the ASHRAE standard and under real climatic conditions of Semnan (35° 33′ N, 53° 23′ E), Iran. Over a broad range of operating and design conditions, the performance of all three collectors have been studied. Based on the results, v-corrugated collector and flat plate one found to be the most and least efficient, respectively. Moreover, the collectors have also been studied in double pass mode in order to examined the extent in efficiency improvement. Manuscript profile

Open Access Article

5 - Supporting Security in Software Development Phases for Prometheus Methodology
Mohammad Hossein Davarpour Mohammad Ahmadinia

While security is a key feature in development of complex softwares and multi-agent systems, there are few works around this subject, especially in adding security to agent-oriented software methodologies. This paper adds an extention to Prometheus methodology so it can More

While security is a key feature in development of complex softwares and multi-agent systems, there are few works around this subject, especially in adding security to agent-oriented software methodologies. This paper adds an extention to Prometheus methodology so it can cover security concerns in different phases of agent-oriented software development. To this end, we define the required security concepts and then integrate them in different phases of Prometheus methodology. The functionality of this extention is explained using a HMIS as a case study. Manuscript profile

Open Access Article

6 - A Mathematical modeling procedure to obtain thermoelectric internal parameters
مرضیه سیاه مرگویی نادر رهبر

Thermoelectric is the science of heat conversion into electrical energy or electrical energy conversion into heating or cooling inversely. Currently the mass application of thermoelectric is in the coolers. The most important characteristic of these chips is the lack of More

Thermoelectric is the science of heat conversion into electrical energy or electrical energy conversion into heating or cooling inversely. Currently the mass application of thermoelectric is in the coolers. The most important characteristic of these chips is the lack of mechanical parts, enabling the use of clean and silent, small size and light weight, reliability and also provides simple maintenance and repair. The main obstacle in the commercialization of this technology is its low efficiency. In this paper, the theoretical approach to obtain a thermoelectric internal parameters has been studied. This method is validated by examining the results obtained from this procedure with catalog values. The results show the error of this method is 3.17%. Manuscript profile

Open Access Article

7 - Design and production of a machine for straightening extruded brass bars
Parviz Ghazvinian

In this project attempt has been made to use straightening machine for extruded brass bars as a repairing machine to be evaluated as a conceptual design. At first, reasons for the existence of such machine have been stated and then its specifications, ease of making, ma More

In this project attempt has been made to use straightening machine for extruded brass bars as a repairing machine to be evaluated as a conceptual design. At first, reasons for the existence of such machine have been stated and then its specifications, ease of making, maintanance, operation and its high accuracy are discussed. In the initial stages of design, total dimentions of related parts with regard to design expectation and working condition are selected which gave the total size and dimension of the machine. Later, the machine was designed into two parts, that is stimulant machine and supports. Also, the material for parts with regard to its application for the machine was chosen. Manuscript profile

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