نتایج جستجو برای: transation surfaces

تعداد نتایج: 130478  

Journal: :iranian journal of science and technology (sciences) 2005
r. aslaner

in this paper, the time-like hyperruled surfaces in the minkowski 4-space and their algebraicinvariants are worked. also some characteristic results are found about these algebraic invariants.

Journal: :iranian journal of science and technology (sciences) 2005
h. b. karadag

in this paper, the dual area vector of a closed dual spherical curve is kinematically generatedand the dual steineer vector of a motion are extensively studied by the methods of differential geometry.jacobi’s theorems, known for real curves, are investigated for closed dual curves. the closed trajectorysurfaces generated by an oriented line are fixed in a moving rigid body in ir3 , in which the...

Journal: :iranian journal of medical physics 0
maryam abolmasoomi m.sc.in medical physics, tehran university medical sciences, tehran, iran keykhosro keshavarzi assistant professor, medical physics dept., tehran university medical sciences, tehran, iran mehran nikkhou eye specialist, ophthalmology dept., milad hospital ebrahim jafarzadeh poor associate professor, medical physics dept., tehran university medical sciences, tehran, iran

introduction: until now, many models have been presented for optical study of the human eye. in recent years, surgery on the anterior section of the eye (such as cataract and photo-refractive surgery) has increased, so a study on the optics of the eye and evaluation of vision quality has become more important. material and methods: in this article, some of these models are considered. they incl...

In this study, we compute simplicial cohomology groups with different coefficients of a connected sum of certain minimal simple surfaces by using the universal coefficient theorem for cohomology groups. The method used in this paper is a different way to compute digital cohomology groups of minimal simple surfaces. We also prove some theorems related to degree properties of a map on digital sph...

Journal: :iranian journal of public health 0
fethi ben abdallah 1. laboratory of genetic, biodiversity and valorization of bio-ressources. higher institute of biotechnology , monastir, tunisia . ; 2. fermentation unit, pasteur institute , tunisia. rihab lagha 3. laboratory of analysis, treatment and valorization of environment polluants and product. faculty of pharmacy, monastir , tunisia. khaled said 1. laboratory of genetic, biodiversity and valorization of bio-ressources. higher institute of biotechnology , monastir, tunisia . héla kallel 2. fermentation unit, pasteur institute , tunisia. jawhar gharbi 4. sequencing and genomic analysis unit. higher institute of biotechnology , monastir, tunisia.

the aim of this study was to evaluate the ability of 15 serotypes of salmonella to form biofilm on polystyrene, polyvinyl chloride (pvc) and glass surfaces. .initially slime production was assessed on cra agar and hydrophobicity of 20 salmonella strains isolated from poultry and human and two salmonella enterica serovar typhimurium references strains was achieved by microbial adhesion to n-hexa...

2007
ROBERT J. BARTELT MICHAEL R. McGUIRE DEBORAH A. BLACK

A starch formulation of Bacillus thuringiensis Berliner is being developed as a component in a pest management system to control Ostrinia nubi/alis (Hubner). Palatability is one property of starch formulations which must be investigated; this study was done to identify materials that will cause O. nubi/alis larvae to feed readily on starch granules. A two-choice behavioral bioassay was develope...

2005
Motoyuki SATO Jun FUJIWARA Xuan FENG Zheng-Shu ZHOU Takao KOBAYASHI

ALIS (Advanced Landmine Imaging System), which is a novel landmine detection sensor system combined with a metal detector and GPR, was developed. This is a hand-held equipment, which has a sensor position tracking system, and can visualize the sensor output in real time on a head-mounted PC display. In order to achieve the sensor tracking system, ALIS needs only one CCD camera attached on the s...

In this study, we give the relationships between the conical curvatures of ruled surfaces generated by the unit vectors of the ruling, central normal and central tangent of a ruled surface in the Euclidean 3-space E^3. We obtain differential equations characterizing slant ruled surfaces and if the reference ruled surface is a slant ruled surface, we give the conditions for the surfaces generate...

Journal: :فصلنامه علمی پژوهشی مهندسی مکانیک جامدات واحد خمینی شهر 0
koorosh rayzan islamic azad university, najafabad branch ahmad keshavarzi young researchers and elite club, khomeinishahr branch, islamic azad university, khomeinishahr, iran

0

Journal: :journal of health sciences and surveillance system 0
mohammad ali baghapour department of environmental health engineering, school of health, shiraz university of medical sciences, shiraz, iran; seyed mohammad mazloomi research center of nutrition and food sciences, shiraz university of medical sciences, shiraz, iran; kourosh azizi department of medical entomology, school of health, shiraz university of medical sciences, shiraz, iran razieh sefidkar department of environmental health engineering, school of health, shiraz university of medical sciences, shiraz, iran;

background: the consumption of healthy food is considered as an essential need to devoid the physical, chemical, and biological hazards. the importance of this issue is more conspicuous in places such as hospitals where people with somehow compromised immune systems are under treatment. therefore, this research aimed to evaluate the microbiological quality of food contact surfaces in a kitchen ...

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