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Issue Info: 
  • Year: 

    2023
  • Volume: 

    10
  • Issue: 

    1
  • Pages: 

    17-38
Measures: 
  • Citations: 

    0
  • Views: 

    74
  • Downloads: 

    21
Abstract: 

In this paper, the properties of GE-ideals of transitive bordered GE-algebra are studied and characterizations of GE-ideals are given. We have observed that the set of all GEideals of a transitive bordered GE-algebra forms a complete lattice. The notion of bordered GE-morphism is introduced and established fundamental bordered GE-morphism theorem. A congruence relation on a bordered GE-algebra with respect to GE-ideal is introduced and some bordered GE-morphism theorems are derived.

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Issue Info: 
  • Year: 

    2021
  • Volume: 

    10
  • Issue: 

    4
  • Pages: 

    269-276
Measures: 
  • Citations: 

    0
  • Views: 

    97
  • Downloads: 

    27
Abstract: 

In this paper, the inverse eigenvalue problem for the bordered diagonal matrices are reconsidered whose elements are equal to zero except for the first row, the first column and the diagonal elements. The necessary and sufficient conditions for existence of a symmetric bordered diagonal matrix from special spectral data have been determined. A new algorithm to make such matrices is derived and some numerical examples are given to illustrate the efficiency of the method.

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Author(s): 

KUMAR R. | PRATAP G.

Issue Info: 
  • Year: 

    2009
  • Volume: 

    5
  • Issue: 

    -
  • Pages: 

    171-184
Measures: 
  • Citations: 

    1
  • Views: 

    127
  • Downloads: 

    0
Keywords: 
Abstract: 

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Author(s): 

KUMAR R. | PARTAP G.

Issue Info: 
  • Year: 

    2009
  • Volume: 

    4
  • Issue: 

    1
  • Pages: 

    55-77
Measures: 
  • Citations: 

    0
  • Views: 

    270
  • Downloads: 

    157
Abstract: 

In present study is concerned with the propagation of axisymmetric vibrations in a homogenous isotropic micropolar thermoelastic cubic crystal plate bordered with layers or half spaces of inviscid liquid subjected to stress free boundary conditions in context of Lord and Shulman (L-S) and Green and Lindsay (G-L) theories of thermoelasticity. The secular equations for symmetric and skew-symmetric leaky and nonleaky Lamb wave modes of propagation are derived. The amplitudes of displacement components, microrotation and temperature distribution are also computed numerically and presented graphically. Finally, in order to illustrate the analytical developments, numerical solution of secular equations corresponding to stress free thermally insulated micropolar thermoelastic cubic crystal plate is carried out for magnesium crystal material bordered with water layers of finite and infinite thickness.

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Author(s): 

LUKSAMIJARULKUL PIPAT | PIROONAMORNPUN PITTAYA | KANTHARADUSSADEE TRIAMCHAISRI SOMPORN

Journal: 

HEPATITIS MONTHLY

Issue Info: 
  • Year: 

    2011
  • Volume: 

    11
  • Issue: 

    4 (33)
  • Pages: 

    273-277
Measures: 
  • Citations: 

    0
  • Views: 

    353
  • Downloads: 

    271
Abstract: 

Background: Married couples constitute a target group for reducing the risk of infections with hepatitis B virus (HBV) and hepatitis C virus (HCV).Objectives: This study attempted to assess HBV seromarkers, anti-HCV-positive rates, and risk behaviors among married couples in a bordered province of western Thailand.Materials and Methods: A cross-sectional study of 114 married couples aged 15-44 years was performed. Approximately 25-30 married couples were randomly selected from 4 districts in a province of western Thailand. All study participants who participated voluntarily were interviewed using structured questionnaires. Their blood specimens were collected to screen for HBV seromarkers (HBsAg, anti-HBs, and anti-HBc) and anti- HCV.Results: Approximately 21.1% of husbands and 2.6% of wives had a history of extramarital sex without using a condom; 18.4% of husbands and 4.4% of wives had tattoos; and 18.4% and 3.5%, respectively, consumed alcohol regularly. Additionally, 4.4% of husbands and 2.6% of wives had a history of sexual contact before marriage. In the serological study, 10.5% of husbands and 5.3% of wives were HBsAg-positive, and 1.8% of husbands and 0.9% of wives were anti-HCV-positive. Among HBsAg-positive subjects, 15/18 had spouses who were positive for any HBV marker, and 1 had a spouse who was HBsAg- and anti-HBc positive. Three participants were positive for anti-HCV (2 males and 1 female). One anti-HCV-positive male had a history of regular alcohol consumption and extramarital sex without a condom, and another had a history of intravenous drug use. The anti-HCV-positive female had a history of sexual contact before marriage.Conclusions: This study found high percentages of risk behaviors and HBsAg positivity among married couples in a bordered province of western Thailand, especially in husbands. These findings support the evidence of HCV transmission via sexual contact and intravenous drug use.

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Issue Info: 
  • Year: 

    2016
  • Volume: 

    8
  • Issue: 

    3
  • Pages: 

    495-510
Measures: 
  • Citations: 

    0
  • Views: 

    307
  • Downloads: 

    130
Abstract: 

The present study is concerned with the propagation of Lamb waves in a homogeneous isotropic thermoelastic micropolar solid with two temperatures bordered with layers or half spaces of inviscid liquid subjected to stress free boundary conditions. The generalized theory of thermoelasticity developed by Lord and Shulman has been used to investigate the problem. The secular equations for symmetric and skew- symmetric leaky and nonleaky Lamb wave modes of propagation are derived. The phase velocity and attenuation coefficient are computed numerically and depicted graphically. The amplitudes of stress, microrotation vector and temperature distribution for the symmetric and skew-symmetric wave modes are computed analytically and presented graphically. Results of some earlier workers have been deduced as particular cases.

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Issue Info: 
  • Year: 

    2016
  • Volume: 

    9
  • Issue: 

    11
  • Pages: 

    0-0
Measures: 
  • Citations: 

    1
  • Views: 

    160
  • Downloads: 

    103
Abstract: 

Background: Acanthamoeba spp. is a free-living opportunistic protozoan parasites, which can be found in tap, fresh and bottled mineral waters, contact lens solutions, soil etc. Objectives: The present study is aimed to determine the Acanthamoeba spp. on the basis of their morpho-molecular aspects in different water sources of theWest Azerbaijan province, Northwest of Iran. Methods: In this cross-sectional study, 60 water samples were collected from rivers and tap waters during June to September 2015. The water samples were filtered through a cellulose nitrate filter and cultured on non-nutrient agar medium. The extracted DNAs were amplified and some ampliqons were sequenced using partial 18S rRNA for genotyping and phylogenetic analyses. Results: Twenty-seven (45%) out of 60 water samples were positive to Acanthamoeba spp. using both culture and morphological examinations. In addition, 24 (40%) out of 27 positive samples in culture method were confirmed by PCR to be Acanthamoeba spp. Conclusions: A relatively high prevalence of Acanthamoeba spp. in rivers reflects a risk alert for threatening human health in the region. However, well hygienic status of the tap waters considering Acanthamoeba spp. cannot be ignored in western co-border regions of Iran-Iraq. This study can also serve as a platform for further explorations of water sources in Iran and neighboring countries.

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Issue Info: 
  • Year: 

    2003
  • Volume: 

    18
  • Issue: 

    2
  • Pages: 

    239-266
Measures: 
  • Citations: 

    1
  • Views: 

    1350
  • Downloads: 

    0
Abstract: 

In order to investigate the possibility of utilizing cotton stem in cellulosic industries chemical, physical and anatomical properties of cotton stem (var. varamin) was investigated.Cotton wood fiber length, fiber diameter, lumen diameter and cell wall thickness was measured at 840 mm, 23.9mlm, 16/11mm, and 3/9mm respectively.Cotton stem oven-dry density, basic density, and air-dry density were measured at 0/44 gr./cm3, 0.4Ogr/cm3, and .42gr/cm3.Shrinkage and swelling was measured at 7.7 %, 8.3% and porosity was measured at 70.5%.Chemical composition was as follow: cellulose 52%, lignin 29.2%, ash 104% and extractives 6.8%.Anatomical features were as follow: Growth ring boundaries distinct or absent Wood diffuse-porous. Vessels in diagonal or radial pattern grouping:partly solitary partly in radial multiples of 2-4-6 or very small cluster Simple perforation plate. Intervesse pit alternate. Intervessel pit size: minute -< 4mm. Vestured pits absent. Vessel-ray pits with much reduced borders to apparently simple Helical Thickening absent. Mean tangential diameter of vessel lumina 50-100mm. Vessels per square millimeter 20-40 vessels. Mean vessel element length - < 350mm. Tyloses Gums & deposits absent. Fiber with simple to minutely bordered pits. Helical thickening in ground tissue fibers absent.Nonseptate fiber present. Fibers very thin walled. Rays with multi seriate portion as wide as uniseriate portion. Aggregate rays absent. Ray height> 1mm. Body ray cells procumbent with over 4 rows of upright  And square marginal cells Ray per millimeter 4-12/mm.

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Issue Info: 
  • Year: 

    2003
  • Volume: 

    18
  • Issue: 

    1
  • Pages: 

    109-132
Measures: 
  • Citations: 

    1
  • Views: 

    2068
  • Downloads: 

    0
Abstract: 

Ziziphus lotus of the family Rhamnaceae is distributed in the southern region of Iran and considered as one of drought - resistant tree species of the country. This investigation is the first attempt to study wood properties of this species, in order to contribute to a better understanding of it. The results of this study revealed that Ziziphus lotus is a diffuse – porous with basic specific gravity medium and medium - textured wood. The length of vessel elements are medium, the diameter of vessel elements is small, porous with pores round to oval, intervessel pilting, opposite and intermediate, 20 vessels per square millimeter, simple perforation plates, vessel - ray pits similar to intervessel pits in size and shape and half  bordered; Vascular tracheids present, there are rarely tyloses and Gums in vessels. Fibers with simple to minutely bordered pits, thin - to thick – walled and fiber lengths short; Parenchyma scanty paratracheal, vasicentric and rarely aliform; Ray uniseriate and sometimes biseriate, ray height is short, rays with procumbent, Square and upright cells mixed throughout the ray and one Prismatic crystals in chambered upright and square ray cells, rays 12 per mm, silica bodies in ray cells; There are 7-10 Schizogenous canals in pith.In this species also percentages of cellulose are high but ash and extractive soluble in acetone content was found to be low.

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Issue Info: 
  • Year: 

    2012
  • Volume: 

    1
  • Issue: 

    3
  • Pages: 

    204-207
Measures: 
  • Citations: 

    0
  • Views: 

    252
  • Downloads: 

    102
Abstract: 

In this paper, by means of fuzzy approaches, an accurate method is introduced for edging of color photographs. The difference between our method with other similar methods is the use of a morphological operation to think or thick the obtained edges. In this proposed method, a 3×3 window is dragged on the photo. For each block, 12 point sets will be defined, each including two non-overlapping point sets. Then, a fuzzy membership function will be designed for each point sets according to data of contrast. At last, the range of membership contrast degree for the points of second point sets will be assessed. A comparison of membership degree of second point sets with a pre-defined threshold indicates whether central point of window is bordered or non-bordered. The method was performed on some reference images and the results were compared with common edging methods. The results show that proposed method has a high capability to edge photographs.

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