Intelligent Vehicle Highway Systems (Ivhs) Issues and Recommendations
R. S.
Nanda
, Research Scientist Transmode Inc.
author
text
article
1995
eng
Intelligent Vehicle Highway Systems (IVHS) is the integration of various pieces of information and computer technologies to the transportation elements in order to obtain a more productive transportation system. The five major components of IVHS are the Advanced Traffic Management Systems (ATMS), Advanced Vehicle Control Systems (AVCS), and Advanced Public Transportation systems (APTS). This paper examines the different macro level issues such as socioeconomic, legislative, financial, environmental and international as well as micro level issues such as insurance and liability related to IVHS. It then identifies the obstacles that potentially hinder the implementation and growth of IVHS. After examining the implications of these issues it attempts to make suitable recommendations to help resolve different IVHS issues. The issues concerning the applicability of IVHS in developing countries are also examined in light of the current situation and suggestions on the applicability of specific technology areas are included.
International Journal of Engineering
Materials and Energy Research Center
1025-2495
8
v.
3
no.
1995
121
132
https://www.ije.ir/article_71127_c8c8f22ab663e612f25f4e0b1c8050eb.pdf
Interactive Analysis of Space Frame Raft Soil System
J.
Noorzaie
Civil Engineering, university putra Malaysia
author
text
article
1995
eng
This study presents a new approach for physical and material modeling of space frame-raft-soil system. The physical modeling consists of a modified Thimoshenko beam bending element with six degrees of freedom per node to model the beams and columns of the superstructure, a modified Mindlin's plate bending element with five degrees of freedom per node to represent the structural slabs and raft, and the coupled finite-infinite elements with three degrees of freedom per node to model the soil media. The constitutive modeling involves the use of the hyperbolic model to account for the soil nonlinearity. The applicability of the proposed physical model is demonstrated by analyzing a four storey, five bay by three bay space frame. Morever, an attempt has been made to compare the linear and nonlinear interactive behavior of the space frame-raft-soil system.
International Journal of Engineering
Materials and Energy Research Center
1025-2495
8
v.
3
no.
1995
133
146
https://www.ije.ir/article_71128_2006d2cc0e8ca350be86d642a3081596.pdf
Effects of Tungsten on the Pearlite Reaction in a Eutectoid Steel
J.
Aghazadeh
Mining & Metallurgical Eng., Amirkabir University of Technology
author
text
article
1995
eng
The effect of an addition of 0.37 Wt % Won the overall transformation rate of the austenitepearlite reaction in a eutectoid steel is examined. Pearlite growth rates and interlamerllar spacing are measured as a function of transformation temperatures. Tungesten raises the Ael temperature, for most transformation temperatures, decreases the overall reaction rate, the growth rate and the interlamellar spacing. Partitioning studies carried out using analytical electron microscope showed that, tungesten partitioned preferentially to cementite at temperatures down to 668?°C.
International Journal of Engineering
Materials and Energy Research Center
1025-2495
8
v.
3
no.
1995
147
158
https://www.ije.ir/article_71129_2d0240587b0874dbc5dd6539bb7db764.pdf
Surface Hardness Measurment and Microstructural Characterisation of Steel by X-Ray Diffraction Profile Analysis
G. H.
Farrahi
School of Mechanical Engineering, Sharif University of Technology
author
J.L.
Lebrun
, LM3, URA CNRS 1219, ENSAM
author
text
article
1995
eng
An X-ray diffraction line will broaden considerably when steels change into martensitic structure on quenching. The results presented in this paper show that X-ray diffraction technique can be employed for a rapid and nondestructive measurement of hardness of hardened steel. Measurement on various quenched and tempered steels showed that the breadth of its diffraction peak increased with increasing hardness. Some empirical equations are derived to correlate the width of the diffraction line with the hardness. The diffraction profile analysis can offer good indication about the material's characteristics and the microstructural evolution caused by heat treatment or by mechanical loading.
International Journal of Engineering
Materials and Energy Research Center
1025-2495
8
v.
3
no.
1995
159
168
https://www.ije.ir/article_71130_71ee2f50d94ca84cf9e90a691007f133.pdf
Modified Enthalpy Method Applied to Laser Annealing of Semi Conductor Films
C. P.
Grigoropoulos
Mechanical Engineering, University of California
author
AA
Rostami
Mazandaran, chemistry
author
text
article
1995
eng
The rapid melting of silicon film due to the absorption of a CW laser beam radiation is studied. The silicon film melting and recrystallization is mainly controlled by the temperature distribution in the semiconductor. The enthalpy technique for the solution of phase change problems is used in an explicit finite difference form to calculate the transient temperature distribution in the silicon film and the substrate and the growth rates of the melt pool. The technique is modified so that it is not necessary to assign a constant temperature, Tm, to the mesh element that contains the melt front. Calculations are carried out for a range of laser beam parameters and material translational speeds. The results for the melt pool size are compared with the experimental data and reasonable agreement is obtained.
International Journal of Engineering
Materials and Energy Research Center
1025-2495
8
v.
3
no.
1995
169
179
https://www.ije.ir/article_71131_ec3e4b085ca21549f247350ccd570293.pdf