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Search Results: 1 - 10 of 150492 matches for " Karimi H. "
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Comparative Study of the Three Different Times for Manual Removal of Retained Fetal Membranes in the Cow
H. Hamali,H. Karimi
Journal of Animal and Veterinary Advances , 2012,
Abstract: The syndrome of retained placenta or Retained Fetal Membranes (RFM) is an important economic problem that affects cows in the farms of Iran and many other countries. For determine of the best time for manual removal of fetal membranes, from September 2002 to September 2005 a total number of 200 RFM cows in the farms of Tabriz (north-west of Iran) were identified and randomly divided to 4 groups of A, B, C and D. In the groups of A, B and C the fetal membranes were pulled out by manual traction on days 6, 7 and 8 postpartum (Day of parturition = 0), respectively. The rates of complete or incomplete removal of fetal membranes were recorded in each group. In the group of D (group of control), the fetal membranes were not removed by hand and the mean time of spontaneous expulsion of fetal membranes in this group calculated as M = 10.8 days. In the groups of A, B and C, the rates of complete removal of fetal membranes were recorded as 52, 76 and 100%, respectively. Significant statistical differences (p<0.05) were observed between group of C (day of 8th postpartum) and other groups. These results indicated that, from technical point the day of 8th postpartum is the best time for manual removal of retained fetal membranes in the RFM cows. In other word, due to the high probability of fetal membranes rupturing and remaining of the part(s) of placenta in the uterus and following complication, traction of retained placenta, before the 8th day of postpartum, is not recommended in the RFM cows.
FEMALE GENITAL TUBERCULOSIS, A 10 YEAR CLINICO-PATHOLOGIC STUDY
W. Karimi,H. Emami
Iranian Journal of Public Health , 1975,
Abstract: The results of 10 year clinico - pathologic study about female genital tuberculosis in Isfahan are reported. The main aims of this investigation were to study and review the tuberculosis of female genital tract to evaluate the influence of treatment and above all, to attempt to gain a better insight into the relation of infertility to this disease. In this study the following points have been taken into consideration: age incidence, previous health, presence of absence of other forms of tuberculosis, principle symptoms, bacteriologic and histological findings, the frequency of unsuspected endometrial tuberculosis, cases treated medically and surgically, and conception rate following treatment. The diagnostic procedures used in detection of these cases included: endometrial curettage biopsy, bacteriologic and histopathology examination of tissues removed from female genital organs, and laparotomy.
Determination of Drug Resistance Pattern of Prevalent Bacteria Isolated from Patients with UTI
H Zandi,E Karimi
Iranian Journal of Public Health , 2007,
Abstract: Background: Urinary tract infections are the most prevalent bacterial infections in the world and using empiric antibiotic therapy may increase the drug resistance. This cross- sectional study accomplished to determine the prevalence of UTI and related antibiotic resistance pattern. Methods: UTI suspected patients referred to Yazd central laboratory studied. The urine samples cultured colonies with colony count of > 105 cfu/ml identified, and antibiotic resistance patterns determined by the standard disk diffusion method (Kirby-Bauer). Results: Out of 17353 samples 1623 (9.35%) were positive culture. The most prevalent microorganisms were as follows: E.coli (47.07%). Enterobacter (12.07%). S. aureus (10.96%), Klebsiella pneumoniae (9.85%), CNS (8.37%), group B streptococci (4.86%). Enterococci (2.09%). Pseudomonas aeruginosa (1.54%). Proteus (1.17%). Nonhemolytic streptococci (0.86%), Citrobacter and α hemolytic Streptococci (0.55%). The antibiogram results showed that isolated strains had the most drug resistance as follows: to ampicillin (80%), SXT (53.66%), tetracycline (50.33%), cephalexin (22.92%), nalidixic acid (19.4%), nitrofruntain (17.12%), ceftizoxime (8.5%) and ciprofloxacin (8%). Gram (+) cocci strains were 100% sensitive to vancomycin. Conclusion: selection of proper antibiotic against isolated species though susceptibility testing decreases the dissemination of resistant strains.
Histopatologic Evaluation of the Effect of Advanced Periodontal Diseases on Pulp Tissue
A - Moghareabed,H Karimi
Journal of Isfahan Dental School , 2006,
Abstract: Introduction: The diagnosis of the origin of the lesions is one of the basic problems in Endo-Perio lesion. In order to prevent unnecessary and harmful treatment, the accurate diagnosis must be developed. The aim of this study was to evaluate the effect of advanced periodontal diseases on pulp tissue.Methods and materials: In this experimental study, fourty two anterior teeth were extracted from 22 patients referred to dental clinic of Isfahan university with advanced periodontal disease and 5 intact teeth as control were sectioned immediately after extraction. Teeth were fixed in 10% formalin solution. They were decalcified with Nitric Acid 10% and finally two histopathologic sections were prepared and evaluated. The results were statistically analyzed by Fisher’s exact test.Results: From total of 42 teeth; 13 teeth had normal pulp (30.95%), and the other 29 teeth (69.05%) had pulpal problem. The control group showed 100% normal results. Statistical analysis of the results showed significant difference between two groups.Conclusion: Under the limitations of the present study it was concluded that periodontal disease can develop inflammatory lesions, atrophic and degenerative changes in pulp.
Effects of Parent Materials, Gypsum and Carbonates on the Magnetic Susceptibility of Soils in Southern Mashhad
A. Karimi,H. Khademi
Journal of Science and Technology of Agriculture and Natural Resources , 2012,
Abstract: Magnetic susceptibility measurement is a simple and quick technique for characterizing soils and sediments and describing soil-forming processes. The interpretation of soil magnetic susceptibility data needs sufficient knowledge about the factors affecting this parameter. To identify the effects of parent material, gypsum and calcium carbonate equivalent, 42 samples were taken from horizons of soils developed on loessial, alluvial, granitic and marly materials in southern Mashhad. Gypsum and carbonates of soil samples were removed by successive washing with distilled water and diluted HCl, respectively. Magnetic susceptibility of bulk samples ( lfbulk), gypsum free samples ( lfGf), gypsum and carbonates free samples ( lfGCf) and gypsum, carbonates and sand free samples ( lfGCSf) was measured. The results revealed a strong 1:1 correlation between the measured and calculated lfGf and lfGCf. Despite the high amounts of gypsum and carbonates in soils developed on marls, their lfbulk was much more than that of the other soils and reached up to 121.8×10-8m3 kg-1. In contrast, the lfbulk values of saprolitic granite were less than 10.4×10-8m3 kg-1. The lfbulk values of loessial and alluvial soils were less than those of marly soils but higher than those of soils developed on saprolitic granite. lfbulk values were negatively correlated with the amount of sand. However, reduction in magnetic susceptibility values of marly soils after removing sand reflects the different nature of this soil. The correlation between lfbulk and amount of silt and clay is positive, but the magnetic susceptibility values are more sensitive to clay percentage, indicating the more important contribution of clay to magnetic susceptibility values. The results of this study highlight the role of parent materials, gypsum and carbonates in the soil magnetic susceptibility values that should be considered.
Modeling Distillation Mass Transfer Efficiency
Rahimi M. R.,Karimi H.
International Journal of Chemical and Environmental Engineering , 2011,
Abstract: Mass transfer efficiency was modeled by developing a computational fluid dynamic based artificial neural network model. A CFDmodel was developed and validated for hydrodynamics and mass transfer characteristics of distillation column. Generated data byCFD include a wide range of operating conditions, tray geometries and material properties were used for training and testing network.The model results were close to experimental data and shown that CFD-ANN model can be used as a powerful tool in tray design andanalysis.Keywords:
A Message-Passing Algorithm for Counting Short Cycles in a Graph
Mehdi Karimi,Amir H. Banihashemi
Mathematics , 2010,
Abstract: A message-passing algorithm for counting short cycles in a graph is presented. For bipartite graphs, which are of particular interest in coding, the algorithm is capable of counting cycles of length g, g +2,..., 2g - 2, where g is the girth of the graph. For a general (non-bipartite) graph, cycles of length g; g + 1, ..., 2g - 1 can be counted. The algorithm is based on performing integer additions and subtractions in the nodes of the graph and passing extrinsic messages to adjacent nodes. The complexity of the proposed algorithm grows as $O(g|E|^2)$, where $|E|$ is the number of edges in the graph. For sparse graphs, the proposed algorithm significantly outperforms the existing algorithms in terms of computational complexity and memory requirements.
An Efficient Algorithm for Finding Dominant Trapping Sets of LDPC Codes
Mehdi Karimi,Amir H. Banihashemi
Mathematics , 2011,
Abstract: This paper presents an efficient algorithm for finding the dominant trapping sets of a low-density parity-check (LDPC) code. The algorithm can be used to estimate the error floor of LDPC codes or to be part of the apparatus to design LDPC codes with low error floors. For regular codes, the algorithm is initiated with a set of short cycles as the input. For irregular codes, in addition to short cycles, variable nodes with low degree and cycles with low approximate cycle extrinsic message degree (ACE) are also used as the initial inputs. The initial inputs are then expanded recursively to dominant trapping sets of increasing size. At the core of the algorithm lies the analysis of the graphical structure of dominant trapping sets and the relationship of such structures to short cycles, low-degree variable nodes and cycles with low ACE. The algorithm is universal in the sense that it can be used for an arbitrary graph and that it can be tailored to find other graphical objects, such as absorbing sets and Zyablov-Pinsker (ZP) trapping sets, known to dominate the performance of LDPC codes in the error floor region over different channels and for different iterative decoding algorithms. Simulation results on several LDPC codes demonstrate the accuracy and efficiency of the proposed algorithm. In particular, the algorithm is significantly faster than the existing search algorithms for dominant trapping sets.
On Characterization of Elementary Trapping Sets of Variable-Regular LDPC Codes
Mehdi Karimi,Amir H. Banihashemi
Computer Science , 2013,
Abstract: In this paper, we study the graphical structure of elementary trapping sets (ETS) of variable-regular low-density parity-check (LDPC) codes. ETSs are known to be the main cause of error floor in LDPC coding schemes. For the set of LDPC codes with a given variable node degree $d_l$ and girth $g$, we identify all the non-isomorphic structures of an arbitrary class of $(a,b)$ ETSs, where $a$ is the number of variable nodes and $b$ is the number of odd-degree check nodes in the induced subgraph of the ETS. Our study leads to a simple characterization of dominant classes of ETSs (those with relatively small values of $a$ and $b$) based on short cycles in the Tanner graph of the code. For such classes of ETSs, we prove that any set ${\cal S}$ in the class is a layered superset (LSS) of a short cycle, where the term "layered" is used to indicate that there is a nested sequence of ETSs that starts from the cycle and grows, one variable node at a time, to generate ${\cal S}$. This characterization corresponds to a simple search algorithm that starts from the short cycles of the graph and finds all the ETSs with LSS property in a guaranteed fashion. Specific results on the structure of ETSs are presented for $d_l = 3, 4, 5, 6$, $g = 6, 8$ and $a, b \leq 10$ in this paper. The results of this paper can be used for the error floor analysis and for the design of LDPC codes with low error floors.
The Effect of Fructose, Prolin, Initial Doses and Different Temperatures on the Growth and Metabolism of Lactobacillus acidophilus La5
G. Karim,H. Karimi Darhabi,H. Mirzaei
Journal of Animal and Veterinary Advances , 2012,
Abstract: Probiotics are useful bacteria, which after consumption, inhibit the harmful microorganisms in the intestines and leave useful effects on human health. The biological activity of probiotics is affected by various environmental factors each of which can influence the performance as well as the growth of probiotics for increasing the health of the consumers. This study aims to study the effect of fructose, prolin doses of 0.5, 1, 1.5 and 2% of the primary culture and temperatures of 35, 38, 41 and 44°C on the growth as well as metabolism and metabolism of Lactobacillus acidophilus La5 in sterilized milk. In order to do this, the milk fermented with Lactobacillus acidophilus La5 (as the culture) and incubated at 35, 38, 41 and 44°C. The acidity and the pH of the milk samples were measured at 0, 2, 4 and 8 h and the total number of microorganisms were counted at 0, 4 and 8 h after the incubation. In order to measure the effect of fructose and prolin, 0.75% (w v-1) of fructose and 1% (w v-1) prolin was added to the milk samples and samples together with the control sample, was kept in incubator at 41°C and then acidity and pH of was measured and the total number of lactobacillus acidophilus was counted at 0, 2, 4 and 8 h after incubation. All the above trials were replicated ten times. The findings of the study using statistical tests indicated that the total number of bacteria and the amount of acidity in incubated milk samples at 41 and 44°C were significantly greater than the other temperatures (p<0.05). The multiplication rate of the total hours of bacteria in samples containing 2% of culture during the fourth hour of incubation was significantly greater than the other samples (p<0.05). However, this difference in 8 h after the incubation was not significant. Concerning the use of probiotic, fructose and prolin, the total number of bacteria and acidity in the milk samples containing fructose was significantly higher those of prolin and sample containing control sample (p<0.05).
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