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Comparison of growth, nutrition and soil properties of pure stands of Quercus castaneifolia C. A. Mey. and mixed with Carpinus betulus L. in the Hyrcanian forests of Iran
Seyed Mohsen Hosseini,Einollah Rouhi-Moghaddam,Ezzatollah Ebrahimi,Ahmad Rahmani
Ecologia Balkanica , 2011,
Abstract: In the present study, Quercus castaneifolia (Oak, as target species) and Carpinus betulus (Horn beam, as native component species) were planted in five proportions (100Q, 70Q:30C, 60Q:40C, 50Q:50C, 40Q:60C) in the Noor region (North Iran). After 12 years, the effects of the species on the growth of the trees, nutrient concentrations in the live and senescent leave and on soil properties were assessed. The results showed the survival and diameter at breast height (dbh) of the individual Oak trees were positively affected by the presence of Horn beam. Percent retranslocation of the nutrients in Quercus trees was: K>N>P. Leaflitter fall production ranged from 4.70 to 6.80 Mg ha1 year 1. N concentration in fully expanded leaves, N and Ca concentrations in the senescent leaves of Quercus trees and N concentration in topsoil were higher in some of the mixed plantations than in the monocultures of the Quercus trees. N fluxes, N and P etranslocation, and soil P concentrations in the monocultures were intermediate relative to mixed plantations. The obtained results somewhat indicated that the mixing with hornbeam increased the productivity and sustainability of the oak sites. Within the framework of this experiment, it appeared that production was maximized when these two species were grown together in the proportion of 50% Quercus castaneifolia and 50% Carpinus betulus.
The Regeneration Structure and Biodiversity of Trees and Shrub Species in Understory of Pure Plantations of Oak and Mixed with Hornbeam in the Hyrcanian Forests of Iran
Einollah Rouhi-Moghaddam,Seyed Mohsen Hosseini,Ezzatollah Ebrahimi,Ahmad Rahmani
Pakistan Journal of Biological Sciences , 2007,
Abstract: The regeneration structure and biodiversity of trees and shrub species in under story of pure and mixed Oak plantations were investigated in Chamestan Forest and Rangeland Research Station of Iran. Planted species including Oak (as main species) and Hornbeam (as associated species). This species were planted in five proportions (100Q, 70Q:30C, 60Q:40C, 50Q:50C, 40Q:60Z) in Northern of Iran in 11 years ago. All of regenerating seedlings and saplings of woody plants were divided into two height classes of 15-200 cm and more than 200 cm. In biodiversity study dominance index of Berger-Parker, diversity index of Fisher alpha, richness index of Margalef and evenness index of Equitability J were used. The results showed that abundance and diversity of regenerated species in under story of all plantations of oak were more than unplanted control plots and also under 50Q:50C were more than pure stand of oak. The presence of primary forest species in under stories of mixed plantation showed the usage of these plantations in development of succession in natural forests.
An Epidemiological Study of Accidents in Teheran Iran
Ezzatollah Mahboubi
Acta Medica Iranica , 1963,
Abstract: In order to study the epidemiology of accidents in Tehran City, the author has collected and analysed records of more than 25,000 accident cases for the period 1960-61 from all available sources such as newspaper rapportages,nine major hospitals of Tehran, Forensic Medicine Department of Ministry of Justice, Vital Statistics Department of Ministry of Health, Labors' Insurance Organization, etc. Approximately 1400 deaths and 17000 severe injuries are accident-induced annually in Tehran and accidents are in the sixth place, as causes of death (=6.7%). They rank first as the pause of deaths for the age group 5-45 years (=23.8%) and fourth for the age group 1-44. (=9. 6%). The distribution of accident types is as follows:- The distribution of accident types is as follows:-"n1. Motor vehicle accidents 27/8%"n2. Other transport accidents 3.7%"n3. Drowning 19.6%"n4. Falls and builidng collapses 16.8%"n5. Burns (all sorts) 12.4%"n6. Poisoning 8.8%"n7. Accident caused by electricity 2.6%"n8.all other accident 8.3%"nVarious epidemiological aspects of these accidents and an analysis"nof fights, suicides and murders are given in the body of the paper
Text Book Evaluation: A Retrospective Study
Sina Nasiri,Ezzatollah Ahmadi
Journal of Academic and Applied Studies , 2011,
Abstract:
Factors Influencing Sustainable Agricultural Knowledge and Sustainability of Farming Systems: A Case Study in Fars Province
Daryoosh Hayati,Ezzatollah Karami
Journal of Science and Technology of Agriculture and Natural Resources , 1999,
Abstract: Studies on sustainable agricultural have not paid adequate attention to farmers' behaviour regarding sustainability. The objectives of this research were: 1) to determine the relationship between socio-economic and farming factors with “sustainable agricultural knowledge”, 2) to predict “sustainable agricultural knowledge” based on socio-economic and farming factors, and 3) to determine the relationship between sustainable agricultural knowledge and sustainability of farming systems. A survey research was used with a multi-stage cluster sampling technique to collect data for the study. In the first stage, 39 villages were selected in Fars Province. Then 200 wheat producers were randomly selected in these villages for interview. The findings indicated that there was a significant and positive correlation between “sustainable agricultural knowledge” with level of literacy, achievement motivation, amount of total wheat production, technical knowledge about wheat production, economic condition, wheat farming model, amount of supervision by Agricultural Service Centers, and educational services provided by extension agents. Stepwise multiple regression indicated that technical knowledge about wheat production, achievement motivation, type of land revenue system, level of literacy and wheat farming model (independent variables) explained more than 50 percent of variability in “sustainable agricultural knowledge”. There was no significant correlation between “sustainable agricultural knowledge” and “sustainability of farming systems”. Possible reasons for this lack of relationship have been discussed. Based on the findings of this study, recommendations are provided towards achieving a more sustainable agricultural system.
A Strong Method for Solving Systems of Integro-Differential Equations  [PDF]
Jafar Biazar, Hamideh Ebrahimi
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.29152
Abstract: The introduced method in this paper consists of reducing a system of integro-differential equations into a system of algebraic equations, by expanding the unknown functions, as a series in terms of Chebyshev wavelets with unknown coefficients. Extension of Chebyshev wavelets method for solving these systems is the novelty of this paper. Some examples to illustrate the simplicity and the effectiveness of the proposed method have been presented.
Gamma-ray compton spectrum analysis to enhance medical imaging using wavelet transformation  [PDF]
Ali Pazirandeh, Saman Ebrahimi
Natural Science (NS) , 2011, DOI: 10.4236/ns.2011.311123
Abstract: Cs-137 radioactive source with 661.7 keV gamma- ray energy and Am-241 with 59.5 keV gamma-ray energy were used to study the body structure of materials by examining transmitted gamma-ray spectrum using a scintillation detector, NaI(Tl). Due to specific characteristic properties of the medium, the passing Compton broad scattering spectrum contains valuable information. It is possible to mark and to specify the Compton spectrum caused by atomic specifications of Al, Cu, bone, muscle, and lipid as interactive materials. Wavelet transforms and other multi-scale analysis functions have been used for compact signal and image representations in de-noising, compression and feature detection processing problems for about twenty years. Comparing the transmitted spectra through muscle, bone and a tumor-like (fat) and analyzing each spectrum by wavelet analysis, the differences of the medium were shown. This study is devoted to use of wavelet transform for feature extraction associated with gamma spectrum, which corresponds to image pixel, and their classification in comparison with the Haar and Rbio3.1 transforms.
DIALYSIS AND RENAL TRANSPLANTATION IN IRAN
AHAD J,GHODS,EZZATOLLAH ABDI
Acta Medica Iranica , 1987,
Abstract:
Pregnancy complications and outcomes in women with epilepsy  [PDF]
Mirzaei Fatemeh, Ebrahimi B. Nazanin
Open Journal of Obstetrics and Gynecology (OJOG) , 2012, DOI: 10.4236/ojog.2012.23047
Abstract: Epilepsy is the most common serious neurological disorder. This is prospective study to investigate whether women with epilepsy have an increased risk of fetal and maternal complications during pregnancy. In this descriptive cross-sectional study, 50 pregnant women who were presented for delivery at Afzalipour Hospital, Kerman, Iran during 2003 to 2009 were assessed. The groups were compared using the Student’s t-test, and one-way-ANOVA for continuous variables and the chisquare test (or Fisher’s exact test if required) for categorical variables. P values of 0.05 or less were considered statistically significant. All the statistical analyses were performed using SPSS version 13 (SPSS Inc, Chicago, IL, USA) for Windows.In 32 (64%) of cases no fetal complication was found, in 5 cases (10.0%) intrauterine growth retardation (IUGR), in 2 cases (4.0%) post-term labor, in 2 cases (4.0%) fetal distress and in 9 cases (18.0%) preterm labor were found. In 15 patients (30.0%) no maternal complication was found; in 2 cases (4.0%) pregnancy induced hypertension (PIH), in 12 cases (24.0%) preterm labor , in 4 cases (8.0%) bleeding, in 14 cases (28.0%) premature rupture of the membranes (PROM) and in 3 cases (6.0%) other complications were detected. Given these findings and previous studies, it seems that epileptic women required more care during pregnancy and the rate of maternal, fetal and obstetrical complications are relatively high among them.
Calculate Thermal Infrared Intensity of the Hull’s Military Ship  [PDF]
Ramin Ebrahimi Laleh, Nima Ghasemloo
Journal of Geographic Information System (JGIS) , 2014, DOI: 10.4236/jgis.2014.64029
Abstract:

Stealth technology emphasizes on the reduction in reflection and radiation energies, the surface of target's body in the range of visual, radar, thermal and near IR and so on. Providing solutions to reduce thermal IR intensity radiation is one of the appropriate actions in passive defense for identifying power and targeting enemy. Therefore, questions are brought up: How much is the thermal IR intensity radiation of surface of the hall’s vessel? How much is the effect of each parameter? This thesis tries to provide the software to answer these questions. The provided software measures thermal IR intensity radiation of the surface of the hall’s vessel by the material substance, the temperature of the surface of the hall’s vessel, the situation and characteristic of the thermal detector, noticing the coefficient of environment atmospheric transmittal. This software by changing the effective parameters on thermal IR radiation calculates the thermal radiation on thermal detector in different situations.

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