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Decontamination of radioactive-contaminated soils

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From:mamdouh sabour

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Radionuclides exist in the environment naturally and, in more recent times, have been added by nuclear power and weapons. The carcinogenic nature and long half-lives of many radionuclides make them a potential threat to human health. Moreover, there is an increasing trend of uranium accumulating in soils due to a number of deliberate or wrong practices. Also, the contamination of land by naturally occurring radionuclides in the wastes from “non-nuclear” industries include uranium mining and milling, metal or coal mining, radium and thorium factories and the processing of materials containing technologically enhanced levels of natural radioactivity.. Public and political pressure to solve a problem situation of this nature occurs when critical toxic levels are reached. As a consequence, there would be a risk for ecosystems, agro-systems and health. It is suggested that knowledge of the mechanisms that control the behaviour of such heavy metals must be improved and can be used for risk assessment and proposition of remediation treatments. Phytoremediation has been used to extract radionuclides and other pollutants from contaminated sites. The accuracy and success of these applications depend on an understanding of the processes involved in plant uptake of radionuclides. This paper reviews the recent advances in uranium removal from contaminated soils, using either Chemical and/or biological techniques (such as hyper-accumulator plants, or high biomass crop species after soil treatment with chelating compounds).
Engineering Spread Sheet via Oil Offshore-Marine

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From:Fadel Sahida

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Engineering Data Sheet for Oi and gas Equipments, including Flanges, Fittings, Valves, etc
随机介质种波传播与散射大作业题

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From:Jay Lee

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随机介质种波传播与散射课程内容
THERMO PHYSICAL PROPERTIES OF COMBUSTION PRODUCTS - PDF

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From:Rashid Nsaif

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The calculation of combustion gases physical properties, (density, dynamic viscosity, thermal conductivity, specific heat) is the first step in calculating the amount of heat released from the combustion gases flow inside heat exchanger tubes. Least squares method (polynomial regression) was used in (Graphing Advantage Plus-Curve Fitting Program) in order to convert the gases physical properties tables data to equations that will be need in the program that build in Microsoft Excel 2003 to perform all the calculation and graphs.
Data Security and Cryptographic Techniques – A Review

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From:Kefa Rabah

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Abstract Since almost the beginning of time, it seems, man has had a need to keep information private and, in many situations, needed to decipher information previously made private by others. In our age of high technology these needs have grown exponentially and become more complex. Today, computer technology is on the verge of providing the ability for individuals and groups to communicate and interact with each other in a totally anonymous manner. Two persons may exchange messages, conduct business, and negotiate electronic contracts without ever knowing the True Name, or legal identity, of the other. Interactions over networks will be untraceable, via extensive re-routing of encrypted packets and tamper-proof boxes which implement cryptographic protocols with nearly perfect assurance against any tampering. Reputations will be of central importance, far more important in dealings than even the credit ratings of today. These developments will alter completely the nature of government regulations: the ability to tax and control economic interactions, the ability to keep information secret, and will even alter the nature of trust and reputation. All this will depend on how secure data can be moved from point-to-point from LAN to Global network data exchange. It is recognized that encryption (otherwise known as scrambling, enciphering or privacy transformation) represents the only means of protecting such data during transmission and, a useful means of protecting the content of data stored on various media, provided encryption of adequate strength can be devised and validated and is inherently integrable into network system architecture.
THERMO PHYSICAL PROPERTIES OF COMBUSTION PRODUCTS - PDF - PDF

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From:Rashid Nsaif

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The calculation of combustion gases physical properties, (density, dynamic viscosity, thermal conductivity, specific heat) is the first step in calculating the amount of heat released from the combustion gases flow inside heat exchanger tubes. Least squares method (polynomial regression) was used in (Graphing Advantage Plus-Curve Fitting Program) in order to convert the gases physical properties tables data to equations that will be need in the program that build in Microsoft Excel 2003 to perform all the calculation and graphs. The chemical composition of light oil is (C, S, H2 , O2 , N2). The complete combustion process produces a mixture of gases, (Carbon dioxide, Water vapor, Nitrogen, Sulfur dioxide). The weight percentage of these components depends on the weight percentage of the fuel chemical composition (Chattopadhyay, 1998).
PERFORMANCE COMPARISON OF AN AUTONOMOUS ROBOT WITH FUZZY LOGIC_ BACKSTEPPING _ MODEL REFERENCE ADAPTIVE CONTROLLERS

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From:HARISH KUMAR

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The objective of this is to compare the performance of an Autonomous Mobile Robot using Fuzzy Logic, Backstepping and Model Reference Adaptive Controllers. contents.... Robot modeling Fuzzy logic controller design Nominal Case With Noises With Perturbation Backstepping controller design Local Tracking Controller Design Global Tracking Controller Design Model reference adaptive controller design
Introduction to robotics-Basic line follower

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From:HARISH KUMAR

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An exclusive tutorial & presentation for Introduction to robotics-Here we start with "A simple line follower". A line follower is an autonomous robot that can follow a line on the arena. The line is usually black or white in color with a contrasting background......
TECHNIQUES OF DIFFERENTIATION

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From:Edsel Mendoza Llave

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TECHNIQUES OF DIFFERENTIATION.ppt
Protein Secretion

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From:Ciaran Porter

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Powerpoint featuring information on: Protein Secretion
Living Factories

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From:Ciaran Porter

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Powerpoint featuring information on: Living Factories
Diffusion

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From:Ciaran Porter

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Powerpoint featuring information on: Diffusion
Cell Membranes and Tissue/Organ Definitions

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From:Ciaran Porter

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Powerpoint featuring information on: Cell Membranes and Tissue/Organ Definitions
Black Holes

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From:Ciaran Porter

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Powerpoint featuring information on: Black Holes
Oracle 11g SQL Fundamentals 1 Exam 1z0_051

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From:tech guide

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The 100% sure stuff, which helps to get certification in a first attempt.For more certification questions mail me.