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06 Aug 2010

Atomic force microscopy lab: An experiment

Thesis - 5 pages - Physics

Atomic Force Microscopy (AFM) methods were used to characterize two samples in two different modes. Contact mode was used to characterize a zinc oxide sample and tapping mode was used to characterize a grating sample. The distance between the grating lines was calculated to be...

05 Aug 2010

Aristotle on physics: Chance and causes

Thesis - 2 pages - Physics

Aristotle's view of Physics seems to emerge out of the primary question of “Why?” Similarly, “Why do things; does anything happen?” I'm aiming to direct my paper more to the philosophy of “chance”, however to reach that aspect I must first identify...

29 Jul 2010

The synthesis of tert-pentyl chloride

Thesis - 3 pages - Physics

Synthesis of new compounds serves important practical purposes. The pharmaceutical industry continuously seeks and develops new compounds as potential drugs for treating disease. The agricultural industry also relies on synthesis to produce new organic chemicals for weed, pest, and fungi control....

29 Jun 2010

Sorption and desorption of chromium in bentonite and kaolinite mixtures

Thesis - 6 pages - Physics

Chromium sorption in soil occurs under different conditions based on the oxidative state of the Cr ion. Variety of factors is influencing the sorption of Cationic Cr III in sub surface environments. In this study, sorption of Cr III has been studied in mixtures of different percentages of...

16 Jun 2010

Fibers and their importance

Thesis - 4 pages - Physics

Communication is the key to the existence of mankind. In the field of telecommunication, the horizons are constantly expanding. In this regard, the optical fiber is a wonder tool in the field of telecommunication. We are aware of the fact that light has a tendency to spread in a straight...

24 May 2010

FMS layout optimization using metaheuristic

Thesis - 6 pages - Physics

Today, Flexible Manufacturing System (FMS) seems to be a very promising technology as it provides flexibility, which is essential for highly competitive, dynamic and change in manufacturing environment. Layout of an industry is the key for productivity. To improve productivity, manufacturing lead...

10 May 2010

Local short term wind speed estimation using back propagation algorithm

Thesis - 14 pages - Physics

Apart from weather forecasting, wind speed prediction is required to estimate atmospheric effects on telecommunication systems such as satellites in launch, electromagnetic signal propagation in wireless channel, inland and water vehicle navigation, air traffic control, missile guidance etc. Wind...

10 May 2010

Water distribution system optimization using Tabu search

Thesis - 4 pages - Physics

Water distribution systems are complex interconnected networks that require extensive planning and maintenance to ensure the required quantity of water is delivered at the required demand nodes. Good maintenance practices can extend the life of water distribution system components and optimal...

29 Apr 2010

An adaptive incremental fuzzy controller for output voltage regulation of boost converters

Thesis - 5 pages - Physics

In this paper an adaptive incremental fuzzy controller (IFC) for output voltage regulation (OVR) in DC-DC boost converters is proposed. The method, first determines a base duty cycle (BDC) for nominal system parameters and voltage regulation specifications, to which, fractional duty cycle...

29 Apr 2010

Deploy robust data transmission over the noisy channel

Thesis - 2 pages - Physics

The secret data is encrypted and permutated using the chaos method. Experiments show the good quality of the stego-image and resistant against the various noise attacks (Like Salt and Pepper). At the same time, the proposed algorithm exhibits good encryption speed, less computations and excellent...

28 Apr 2010

Adopting dynamic self tuning fuzzy worked on output voltage regulation of DC-DC buck converters

Thesis - 4 pages - Physics

In this paper a dynamic self tuning fuzzy controller scheme is proposed for output voltage regulation of DC-DC Buck Converters and is verified by means of simulation. The proposed fuzzy controller scheme adapts the scale factor of its output variable depending on the continuous measurement of...

20 Apr 2010

Preparation and analytical investigation of electrodeposited nickel aluminum oxide composite coatings

Thesis - 11 pages - Physics

Composite coating methods play a major role in enhancing the life of the components by improving the wear resistance of the surface coating used. Electrodeposited composite coatings consist of a metal matrix with either a ceramic or cermets particle addition which represents the new development...

20 Apr 2010

Vendor selection under uncertainty

Thesis - 6 pages - Physics

Vendor selection is of strategic importance to companies. This paper uses fuzzy tools for vendor selection to improve decision-making (DM) through a more systematic and logical approach. Expert opinion is portrayed by allocating different fuzzy weights to the linguistic data in the form of...

15 Apr 2010

Bacteria foraging based algorithm for optimum economic load dispatch with non-convex loads

Thesis - 11 pages - Physics

An algorithm based on Bacteria Foraging (BF) was developed to solve the problem of finding the optimum load allocation amongst the committed units in power system with non-convex loads. The performance of the proposed algorithm is evaluated on a test case of 15 units. The performance of the...

15 Apr 2010

Reliability based design of spur, helical and bevel gears

Thesis - 4 pages - Physics

The concept of reliability is greater importance in the design of various machine members. As reliability is now an exceedingly important aspect of competitiveness, there is need to design reliability into products. Conventional engineering design uses a deterministic approach. It disregards the...

14 Apr 2010

Analysis of energy efficiency, throughput and packet delay for both non-persistent and p-persistent CSMA when two nodes collide

Thesis - 7 pages - Physics

Power efficient wireless technologies are being developed to combat the finite battery power in wireless portable computing devices. This paper investigates energy efficiency, throughput and packet delay for non- persistent and p-persistent CSMA, two protocols popularly applied in current...

14 Apr 2010

Biometrics guards for vehicles

Thesis - 7 pages - Physics

Recent Reports on the auto industry trends states that the car industry is growing at a rate of 8% world over. The Indian car segment is scaling a growth rate of more than 10 -20 percent. This growth has also resulted in growth of one more Industry the car theft industry as more the number of...

14 Apr 2010

Non conventional energy sources i.e. wind power (Use of power electronics in wind energy for obtaining the stability)

Thesis - 7 pages - Physics

The role of induction generators and power electronic converters for energy conversion system is significant. Self-excited induction generator (SEIG) in stand- alone application provides a significant reduction in system operating costs due to fact that wind power is freely available. SEIG also...

14 Apr 2010

Renewable energy: Achievements and potentials

Thesis - 3 pages - Physics

The potential of non-conventional energy sources is enormous as they can in principle meet many times the world's energy demand. Renewable energy (non-conventional) sources such as small hydro power, biomass, wind, solar, and geothermal can provide sustainable energy services, based on the use of...

14 Apr 2010

Implementation of circular lattice model for cyclostationary process

Thesis - 4 pages - Physics

to implement the circular lattice structure which comes under the area of statistical signal processing. The circular lattice structure can be used with wavelets, multi-rate signal processing systems. FPGAs perform the computation of different coefficients of the circular lattice model....

13 Apr 2010

Non conventional energy

Thesis - 5 pages - Physics

The sun, wind, water & bio-mass are either Perennial or renewable sources of energy. Any or more of these sources are available in almost each part of the country. These available sources can be utilized effectively for useful purpose through technological means. Bio-mass is renewable...

13 Apr 2010

Wake up fresh alarm system clock generator unit

Thesis - 10 pages - Physics

Sleep is the regular state of natural rest observed in all human beings. Melatonin is a hormone that our body generates to help sleep. The quantity of the same varies in our body in context to the stage of our sleep. It was studied that melatonin is dependent on the ambient intensity of light....

12 Apr 2010

Study of dental-disease identification in digital radiographs using feature extraction

Thesis - 4 pages - Physics

Conventional film radiography, CT scan, digital radiograph etc. are different imaging modalities which support diagnosis of dental diseases. Amongst all latest advancements digital radiography is more comfortable technique in terms of its interpretation. Image enhancement technique is a right...

12 Apr 2010

Implementation of speed controller of PMDC motor: A fuzzy logic based approach

Thesis - 5 pages - Physics

This paper focuses on one of the armature control methods of speed control of PMDC motor by using fuzzy logic, which is implemented in MATLAB tool box. The use of fuzzy logic in the control system is to reduce the complexity and probably to minimize the mathematical work is in the area of...

12 Apr 2010

Manufacturing and testing of parabolic solar cooker

Tutorials/exercises - 5 pages - Physics

Solar cooking has been proved as the simplest, safest and the most convenient system for cooking food without using traditional fuels and heating up of the kitchen. A parabolic solar cooker works by reflecting solar radiation to a small area, where cooker or baking pot is located. The parabolic...

12 Apr 2010

Brief study of Gabor filters for feature extraction

Tutorials/exercises - 7 pages - Physics

Gabor filters have attracted researchers since they extract information quanta in forms of time and frequency, two physically measurable quantities, combined in the most elegant way by the Heisenberg's uncertainty relation. For decades time-frequency analysis has played a central role in...

12 Apr 2010

Concrete mix design and concrete testing: An experiment using the slump test and compression test

Thesis - 5 pages - Physics

This paper investigates the design of a concrete mix to a specified strength. In particular, it studies the behavior of concrete under compressive loading in order to determine properties such as (1) the compressive strength taken on concrete cylinders taken at 2, 7, 14 and 28-day intervals and...

12 Apr 2010

Hardness and impact test of metals: An experiment using the Rockwell hardness test and the Brinell hardness test (Macroindentation measurements)

Thesis - 6 pages - Physics

Solid material objects come in contact with each other, exerting and transferring forces. The outcome from this contact is subject to the relative hardness of each material and to the magnitude of the stresses induced relative to their yield or fracture strengths. In order to predict accurately...

05 Apr 2010

Simulation of coal bed methane flow characteristics in coal seams

Essay - 4 pages - Physics

The efficiency of methane released from a coal bed depends on various physical and structural factors of the coal bed. Methane is a gas that is absorbed on the internal surface of coal. The amount of gas that can be produced from a given coal bed depends on various factors such as seam thickness,...

05 Apr 2010

The effects of controlled release and congestion in a flow shop with prohibited early shipments

Thesis - 10 pages - Physics

Experiments were conducted with a simulation model of a flow shop with prohibited early shipments under a wide variety of conditions including congestion, which was modeled separately as “blocking” and as “material handling cost (MHC).” Congestion was found to significantly...