1. INTRODUCTION
1.1 Micro Electro-Mechanical System (MEMS)
Micro electro-mechanical structures and systems are miniature devices that enable the operation of complex systems. They exist today in many environments, especially automotive, medical, consumer, industrial, and aerospace. Their potential for future penetration into a broad range of applications is real, supported by strong developmental activities at many companies and institutions. The technology consists of a large portfolio of design and fabrication p ....etc

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143/2015
Maximum : 100 marks
Time : 1 hour and 15 minutes

1.Most chemically active concrete aggregate are from :
(A)Igneous rock
(B)Sedimentary rock
(C ) Metamorphic rock
(D)Sand stones

2.Common sugar added to concrete :
(A)Increases the strength of concrete
(B) Retards the setting of concrete
(C ) Accelerates the setting of concrete
(D) Gives colour to concrete

3.Air permeability test is done to measure :
(A)Setting time of cement
(B) Soundness of cement
(C ) Chemical composition of cement
(D) Finene ....etc

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ABSTRACT

Switching products technologies ranges from traditional Electro Mechanical Relays (EMR) and reed relays to semiconductor switches made of silicon or GaAs materials. A new type of device is currently getting to commercialization. The first sales of RF MEMS switches outside DOD programs have been realized by Teravicta in 2006. The achievements of RadantMEMS in USA DOD programs, the first commercial product sales from Teravicta in 2006 and the 4 other competitors (MEW, XCOMwirel ....etc

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You can total your current semester courses and credits with our online GPA Calculator. The online GPA calculator is a tool to calculate grade point average based on a typical high school system. GPA is calculated by dividing the total amount of grade points earned by the total amount of credit hours attempted. We think you will find our GPA calculator both easy to use and helpful. Students can use the GPA calculator to determine their present high school, college, or graduate school grade point average, determine what their GPA is likely to be ....etc

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Hi I am safaetul i would like to get details on buet msc cse admission test question paper ..My friend ahasan said buet msc cse admission test question paper will be available here and now i am living at ......... and i last studied in the college/school ......... and now am doing ....i need help on ......etc ....etc

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You can total your current semester courses and credits with our online GPA Calculator. The online GPA calculator is a tool to calculate grade point average based on a typical high school system. GPA is calculated by dividing the total amount of grade points earned by the total amount of credit hours attempted. We think you will find our GPA calculator both easy to use and helpful. Students can use the GPA calculator to determine their present high school, college, or graduate school grade point average, determine what their GPA is likely to be ....etc

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INTRODUCTION

Electronics without silicon is unbelievable, but it will come true with the evolution of Diamond or Carbon chip. Now a day we are using silicon for the manufacturing of Electronic Chip's. It has many disadvantages when it is used in power electronic applications, such as bulk in size, slow operating speed etc. Carbon, Silicon and Germanium are belonging to the same group in the periodic table. They have four valance electrons in their outer shell. Pure Silicon and Germanium are semiconductors in normal temperature. So in the ear ....etc

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Carbon Nanotubes

Abstract

Carbon nanotubes (CNTs) are a recently discovered allotrope of carbon. They take the form of cylindrical carbon molecules and have novel properties that make them potentially useful in a wide variety of applications in nanotechnology, electronics, optics, and other fields of materials science. They exhibit extraordinary strength and unique electrical properties, and are efficient conductors of heat. Inorganic nanotubes ....etc

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053/2016
Maximum : 100 marks
Time : 1 hour and 15 minutes

1.A steel bar 10 mm x 10 mm cross section is subjected to an axial 

tensile load of 20 kN. If the length of bar is 1 m and E = 200 

GPa, then elongation of the bar is ?
(A)1 mm (B)0.5 mm
(C )0.75 mm (D)1.5 mm

2.The modulus of rigidity and poisson’s ratio of a material are 

80GPa and 0.3 respectively, Its youngs modulus will be ?
(A)160 GPa (B)208 GPa
(C )120 GPa (D)104 GPa

3.The equivalent torque on a shaft, when it is subjected to 

b ....etc

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Composites materials for aerospace applications
Abstract:
Fibre-reinforced polymer composite materials are fast gaining ground as preferred materials for construction of aircrafts and spacecrafts. In particular, their use as primary structural materials in recent years in several technology-demonstrator front-line aerospace projects world-wide has provided confidence leading to their acceptance as prime materials for aerospace vehicles. This paper gives a review of some of these developments with a discussion of the proble ....etc

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Carbon Fiber Reinforced Polymer (CFRP) is a Polymer Matrix Composite material reinforced by carbon fibers.
The reinforcing dispersed phase may be in form of either continuous or discontinuous carbon fibers of diameter about 0.0004 (10 mkm) commonly woven into a cloth. Similar to fiberglass (glass reinforced polymer), the composite material is commonly referred to by the name of its reinforcing fibers (carbon fiber). The polymer is most often epoxy, but other polymers, such as polyester, vinyl ester or nylon,
Carbon fiber ....etc

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