Generating fault-tolerant information distribution rules from high-level requirements specifications

A Rule-Based Information Distribution System (RBIDS) is a system that uses distributed rules to control message passing (communications) between distributed nodes within a real-time, concurrent distributed environment. The problem addressed in this paper is that there do not exist adaptation (debugging, error removal) algorithms that can be used to maintain existing information-distribution rules (IDRs) to achieve effective and efficient message-communication responses in a distributed system of fact and rule bases. A partial solution to this problem is presented in the paper. This paper presents an algorithm that is used to overcome dynamic erors that have occurred in a RBIDS environment.     

Methodology for quantitative evaluation and selection of complex systems

In this paper a methodology is developed for quantitative evaluation and selection of complex systems satisfying the desired specifications. The proposed methodology is based on the development of a figure of merit combining both problem and system specifications and permitting the evaluation and selection of the most appropriate system from a set of candidate systems suitable for a wide range of applications for which the system can be used. A case study is investigated showing the validity of the developed methodology.     

On the almost sure and almost uniform Lp(p ≥ 1) stability

In this paper a class of stochastic non-linear system which can be described by n nun-linear stochastic Volterra integral equation is considered. The problems of almost uniform L_P(R₀)(p≥1) stability and almost sure L_p(R₀) (p≥1) stability of the system arc then considered in detail.

In § 2, the random Banach fixed point theorem is used to show the existence and uniqueness of solution of the system. This result is then used to establish the almost sure L_p(R₀) (p≥1) stability and almost uniform L_p(R₀)(p≥1) stability for the system under consideration.

For illustration, an example of a feedback control system containing a non-linear amplifier with random gain is considered.     

Effect of front guide nozzle shape on the flow characteristics in an augmentation channel of a direct drive turbine for wave power generation

There is an increasing interest in cross flow turbines(also known as Banki turbines) for small and low head applications because of their simple structure as well as low capital and maintenance costs.The present work aims at implementing the direct drive turbine(DDT) of cross flow type for wave power generation.A numerical wave tank was used to simulate the waves and after obtaining the desired wave properties;the augmentation channel plus the front guide nozzle and rear chamber were integrated to the numer...     

MICROBIOLOGICAL QUALITY OF HAWAWSHY CONSUMED IN ISMAILIA, EGYPT

The focus of this study was to evaluate the microbial quality of hawawshy from vending shops in Ismailia Province, Egypt. Microbiological analysis of hawawshy resulted in aerobic plate counts from 2 × 10³ to 4 × 10⁶ cfu/g and spore counts from 2 × 10² to 5 × 10⁴ cfu/g. Total coliforms ranged from 3 to 2400 MPN/g while Enterobacteriaceae counts ranged from 6 × 10 to 8 × 10² cfu/g and enterococci counts were 3 × 10³ to 6 × 10⁵ cfu/g. Escherichia coli, coagulase positive staphylococci and fecal streptococci were detected in 17.3, 14.6 and 57.3% of examined samples, respectively. Salmonella spp. was not detected. Different Enterobacteriaceae spp. such as Citrobacter freundi, Enterobacter cloacae, Klebsiella oxytoca, Klebsiella pneumoniae and Serratia liquefaciens were isolated with different percentages. The obtained results indicate that consumption of hawawshy may constitute a public health hazard, and as a consequence, handling practices should require more attention and improvement.     

Numerical and experimental investigation on the breast cancer tumour parameters by inverse heat transfer method using genetic algorithm and image processing

This study presents numerical and experimental investigation on breast cancer tumour parameters by inverse heat transfer method using genetic algorithm (GA) and image processing (IP) to determine the depth and rate of heat generation of a breast cancer tumour. To simulate the problem, using the energy equation in a cylinder including a heater, the surface temperature distribution was obtained. Then, the temperature surface of the cylinder was analysed by the GA in MATLAB software to determine the depth and rate of heat generation of heater. The validity of the numerical method was evaluated using the IP from a laboratory sample. A thermal heater was placed inside a cylinder and was covered by a tissue similar to the human body tissue. According to the obtained results, it was determined that the results of the laboratory sample and the numerical method were in agreement with each other. Finally, these steps were applied on the thermal image of a patient’s cancer breast to determine the depth and rate of heat generation of the breast tumour. It is shown that the average computational error between numerical and experimental results in this method to determine the depth of the tumour is about 8–10% and to determine the rate of tumour heat generation is about 0.01–1%.     

Reaction of Anatase and Rutile with Barium Carbonate

PTC materials with the nominal composition (Ba_0.997La_0.003) (Ti_1.012Mn0.₀₀₀₅)O_3.025 were prepared from reagent-grade barium carbonate and commercial grades of anatase and rutile. Both forms of TiO₂ had approximately the same crystallite size. The solid state reaction was followed by thermal analysis and by X-ray diffraction and gravimetric measurements during isothermal heat treatments. The reaction kinetics for both mixtures were virtually the same. However, some variations in microstructural development during sintering were observed, which may be related to subtle differences in crystallite character deriving from the different crystal structures of the TiO₂.     

单晶金红石型TiO2纳米棒的湿法合成（英文）

用TiO2粉末、NaOH和蒸馏水为原料合成金红石型TiO2纳米棒。XRD和FESEM分析表明,制备的样品为单晶且无杂质,其平均粒径约为40 nm。当样品于600°C退火2 h后,FESEM观察发现生成了TiO2纳米棒。XRD分析表明纳米棒为单晶。纳米棒表面光滑,其长约为1μm,直径约为80 nm。紫外和拉曼光谱研究表明,所制备样品的能带间隙为3.40 eV。