Original Research Paper science education
Linear stability analysis of two-dimensional boundary layer flow using spectral method

M.J. Maghrebi; M. Feyzabadi Farahani; A. Zarghami

Volume 1, Issue 3 , July 2007, Pages 127-136

https://doi.org/10.22061/tej.2007.1266

Abstract
  Theories of linear stability, reinforcement, or degradation of small disturbances examine the velocity applied to the average velocity of the flow. When the boundary layer flow expands linearly in the early stages of its development, the input boundary conditions of the computational domain are determined ...  Read More

Original Research Paper science education
Three-phase synchronous hysteresis motor control with separation The variables d and q

Z. Nasiri Gheydari; H, Lesani; A. Darabi; F. Totonchian

Volume 1, Issue 3 , July 2007, Pages 137-150

https://doi.org/10.22061/tej.2007.1267

Abstract
  The use of a hysteresis motor in precision systems, such as inertial navigation and video recorders, requires rapid dynamics and precise control of the motor. The control system is a closed loop control system that speeds up the system's response speed, and in fact using it, alternating current motors ...  Read More

Original Research Paper Architecture
Investigating the behavior of concrete beams torsion with longitudinal reinforcement only in the finite element method

R. Pourhosseini; R Morshed; A.H. Khaje Hosseini

Volume 1, Issue 3 , July 2007, Pages 151-157

https://doi.org/10.22061/tej.2007.1268

Abstract
  Most existing regulations, unlike cutting, do not provide for reinforced concrete reinforcement for reinforced concrete members after cracking. In this paper, the torsional strength of reinforced concrete beams with longitudinal and non-silent reinforcement is modeled and examined during and after cracking. ...  Read More

Original Research Paper science education
Investigate and measure the angular accuracy of ML, MUSIC, Root-MUSIC algorithms and spatial smoothing in signal detection

S. Shirvani Moghadam; M. Jalali; H. Aminollahi

Volume 1, Issue 3 , July 2007, Pages 159-166

https://doi.org/10.22061/tej.2007.1269

Abstract
  In this paper, we first simulate ML, MUSIC, Root-MUSIC algorithms and space smoothing in noisy and fiddling environments, and then these algorithms are compared in terms of estimating the accuracy of the angles received from the two sources. By presenting the simulation results of four algorithms in ...  Read More

Original Research Paper science education
knots geometry and its training in school

E. Reyhani

Volume 1, Issue 3 , July 2007, Pages 167-178

https://doi.org/10.22061/tej.2007.1270

Abstract
  Euclidean geometry has been taught to students in schools for many years. Topological structures are among the topics that have not received much attention in school geometry. The knot is one of the most suitable topics for teaching in school, which has a topological structure. In addition to being rooted ...  Read More

Original Research Paper Information literacy
Application of science education standards for Iran

M. Sadrolashrafi

Volume 1, Issue 3 , July 2007, Pages 179-198

https://doi.org/10.22061/tej.2007.1271

Abstract
  The historical study of developed countries and their economic and industrial prosperity shows the serious attention of managers and planners of these countries to standardization in education. The education system of a country is the most vital part of the economy and the most popular institution for ...  Read More

Original Research Paper Architecture
Crystal Engineering and Molecular Architecture

H. Aghabozorg; F. Manteghi; M. Ghadermazi; F. Mohammad Panah; S. Sheshmani

Volume 1, Issue 3 , July 2007, Pages 199-220

https://doi.org/10.22061/tej.2007.1273

Abstract
  The aim of this paper is to provide a link between research projects and education to optimize teaching and learning of related subjects. In a research project, three compounds including an intermolecular proton transfer compound, a hydrated carboxylic acid, and a metallic complex were synthesized, all ...  Read More