f. kaveh

Based on the semi-empirical methods to obtain the vibration model of molecule, the zigzag single-walled Boron nitride nanotube (BNNTs) with (8, 0) structure were investigated. Geometry optimizations and vibrational frequencies of BNNTs were carried out at AM1, CNDO, MNDO, M1NDO3 and MC using hyperchem 6 suites of program. The combination and their normalization coefficients of (8, 0) nanotube in C6V point group was calculated and the effect of dielectric constants on the mechanism of these vibrations in nanotubes was studied. This study show that in the high dielectric, the frequency of vibration has alternative behavior, but by the decreasing of the dielectric, this behavior change to stable situation of geometry.

This paper presents a new bi-objective multi-modal hub location problem with multiple assignment and capacity considerations for the design of an urban public transportation network under uncertainty. Because of the high construction costs of hub links in an urban public transportation network, it is not economic to create a complete hub network. Moreover, the demand is assumed to be dependent on the utility proposed by each hub. Thus, the elasticity of the demand is considered in this paper. The presented model also has the ability to compute the number of each type of transportation vehicles between every two hubs. The objectives of this model are to maximize the benefits of transportation by establishing hub facilities and to minimize the total transportation time. Since exact values of some parameters are not known in advance, a fuzzy multi-objective programming based approach is proposed to optimally solve small-sized problems. For medium and large-sized problems, a meta-heuris...

Swelling soils (below S2) due to volumetric clays changes under various atmospheric dryness and wet climatic conditions, induce small topographic surface displacements and therefore affects and deforms overlying buildings. It is a major concern for societies due to both its large spatial extension and to its so expensive costs for remediation. The aim of this work is therefore to locate, characterize and to quantify those small humidity-dependant topographic displacements through new interferometric methods such as Differential Interferometry (DinSAR) as well as Persistent Scatterers Interferometry (PSI) applied to the Paris area (France). If the Differential Radar Interferometry (DinSAR) is a method that enables one to map relative surface displacements from two different radar images acquired on a specific area with a different time span. It gives a rather poor monitoring result in the eastern Paris Basin due to the paucity (versus lack) of coherence in the Paris surroundings despite they are highly affected by recent dryness hazards (last major crisis in 2003). On the contrary, most promising and interesting results are obtained through Persistent Scatterer Interferometry (PSI) that revealed so precisely the absolute surface continuous displacements through time of the topography due to the variation of geometry of the swelling soils (below S2). The latter are highly linked to seasonal climatic parameters as highlighted by the processing of more than 400 ascending and descending radar images. We then succeed to monitor the small topographic displacements through time of the eastern Paris area. In order to validate this approach, we used an home made GIS data base where we compare quaternary geology, lithology, vegetations, buildings and deformed buildings and topographic displacements acquired with interferometric studies. As a result, we realized herein that the vegetation and specifically trees are of first order for the individual building deformations due to S2. Furthermore we note that each trees species have a specific behaviour toward S2 due to both their root geometry (planimetric versus vertical geometry) and their maturity. We propose herein to calculate the potential S2 deformation due to the trees evapotranspiration by quantifiing by trees average altitude above the ground depending of species. Therefore each species of trees due to their differential evapo-transpiration have a specific «planimetric extension agressivity». By combining the geometry of the roots of the trees (surficial contrasting to vertical) and looking for both our wok in the fields and the bibliography, we were herein able to determine the planimetric extension of the « underground water pumping agressivity of each trees species » on swelling soils deformation which is directly related to evapotranspiration. This application presents high potential to better understand the swelling soils natural hazards and the induced and associated geological processes on the individual buildings.

The density functional theory (DFT) has been used to simultaneously investigate physic/chemi-sorption properties of oxygen on the (5, 5) boron nitride nanotube (BNNT). Geometry optimizations were carried out at B3LYP/6-31G*level of theory using gaussian 98 suites of program. physisorption of O2outside the BNNT with a vertical orientation to the tube axis above a boron atom is the most stable state of physisorption and its binding energy is -0.775 kcal/mol. In the chemisorption of O2molecule, the most stable state is above two adjacent B and N atoms of a hexagon with a B-N bond length of 2.503 Å and the binding energy of adsorbed oxygen atoms -14.389 kcal/mol. Based on these results, We also provide the effects of O2adsorption on the electronic properties of BNNTs.

... Tahmasbi, R., Institute of Technical and Vocational Higher Education of Ministry of Jihad-e-Agriculture.,Sharifi, F., Soil Conservation and Watershed Management Research Center.,,Kaveh, F., Department of ... Contact: Ms Maryam ABDOLLAHI; Zeinolabedin YOUSEFINEJAD. ...

The application of simulation models is one of the most efficient ways of analyzing water resources systems, which is based on physical relations accompanied by a series of operational rules attempting to simulate a phenomena as close as possible to reality and the system behavior under a specified policy. HEC-ResSim is one of the simulation models that possess of multi reservoir simulators and can simulate water resources systems. In this research, performance of Jiroft storage dam and its water supply was evaluated. With this model Reliability, resiliency and vulnerability indices were used for system evaluation. Model verification results indicate that, this model is able to simulate the behavior of the system very well. Jiroft storage dam was simulated with various scenarios in the present condition, different periods considering sedimentation, project expansion and increased efficiency. Introducing the system expansion had shown a serious deficit and considerable failures in 25% of the operation periods. But, by increasing irrigation efficiency from 30 to 50%, failures in the system were decreased 12% and resilience was increased to 17%.

Background In a cancer cell the number of copies of a locus may vary due to amplification and deletion and these variations are denoted as copy number alterations (CNAs). We focus on the disparity of CNAs in tumour samples, which were compared to those in blood in order to identify the directional loss of heterozygosity. Methods We propose a numerical algorithm and apply it to data from the Illumina 109K-SNP array on 112 samples from breast cancer patients. B-allele frequency (BAF) and log R ratio (LRR) of Illumina were used to estimate Euclidian distances. For each locus, we compared genotypes in blood and tumour for subset of samples being heterozygous in blood. We identified loci showing preferential disparity from heterozygous toward either the A/B-allele homozygous (allelic disparity). The chi-squared and Cochran-Armitage trend tests were used to examine whether there is an association between high levels of disparity in single nucleotide polymorphisms (SNPs) and molecular, cli...

1. Social Determinants of Health Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran 2. Health Promotion Research Center, Iran University of Medical Sciences, Tehran, Iran 3. Department of Public Health, School of Health, Urmia University of Medical Sciences, Uremia, Iran 4. Center for Communicable Diseases Control, Ministry of Health and Medical Education, Tehran, Iran 5. Department of Pediatrics, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran

AGRIS record. Record number, IR9700712. Titles, A further look at a new unsaturated hydraulic conductivity equation. Personal Authors, Kaveh, F.,Van Genuchten, M.Th. ... Tehran , Iran (Islamic Republic of). Contact: Ms Maryam ABDOLLAHI; Zeinolabedin YOUSEFINEJAD. ...

ABSTRACT Optimization of irrigation water distribution is an important item for water management in irrigation networks. A linear programming model can have problems, for example when the objective function is based on only one goal. So some methods, for example modelling to generate alternatives (MGA), can improve results. This study presented a schedule for distributing irrigation water as well as an optimal cultivation pattern aiming at maximizing net profit on one side and water productivity (WP) on the other. Since the production function is the most important part of water distribution models, the best available production functions were checked and calibrated. The obtained results revealed that WP could be enhanced by 20–40% using the MGA technique. However, investigation of water shortage conditions showed that a 30–35% water deficit could result in an increase of WP by 54%. Thus, it could be argued that the most important matter in water management in irrigation networks is the simultaneous study of WP and water economic productivity (WEP). Considering both factors, a deficit of 30%, which results in a decrease of profit by 10%, was selected as the best alternative for the economic enhancement of WP in the Qazvin Plain. Copyright © 2014 John Wiley & Sons, Ltd.RÉSUMÉL'optimisation de la distribution de l'eau d'irrigation est l'élément important pour la gestion de l'eau dans les réseaux d'irrigation. Un modèle de programmation linéaire peut avoir quelques problèmes, quand, par exemple, la fonction objective est basée sur un seul but. Donc, une méthode, comme la modélisation pour générer des alternatives (MGA), peut amener une amélioration. Cette étude présente un calendrier pour la distribution de l'eau d'irrigation ainsi que d'un modèle de culture optimale visant à maximiser le bénéfice net d'un côté et la productivité de l'eau (WP) de l'autre. Puisque la fonction de production est la partie la plus importante de modèles de distribution d'eau, les meilleures fonctions de production disponibles ont été vérifiées et étalonnées. Les résultats obtenus ont révélé que WP pourrait être améliorée de 20–40 % en utilisant la technique MGA. Toutefois, l'enquête des conditions de pénurie d'eau a montré qu'un déficit en eau de 30–35% pourrait se traduire par l'augmentation de WP de 54%. Ainsi, on pourrait faire valoir que la question la plus importante dans la gestion de l'eau dans le réseau d'irrigation est l'étude simultanée de WP et l'efficacité économique de l'eau (WEP). Considérant les deux facteurs, un déficit de 30%, qui se traduit par la diminution du bénéfice de 10%, a été choisi comme la meilleure alternative pour le renforcement économique de WP à Qazvin Plain. Copyright © 2014 John Wiley & Sons, Ltd.

ABSTRACT The irrigation network of Taleghan Dam Reservoir was used to determine yield response factor for maize (Zea mays), winter wheat (Triticum aestivum), and barley (Hodeum vulgare) in the Qazvin Plain of Iran. Dependent variable actual crop yield and independent variables including climate data were obtained from Qazvin Plain Irrigation Company. Data were gathered from five fields in Qazvin province between 2002 to 2009. Potential evapotranspiration was calculated by the Penman-Monteith method. Actual evapotranspiration (ET a) was measured based on the irrigation requirement at the fields. Yield response factor (K y) was obtained for four crop stages including vegetative, flowering, grain filling, and ripening, and calculated for the total growing period. The K y values for maze, winter wheat and barley in different stages of their growth periods including vegetative, flowering, grain filling, ripening and total growing period were equal to (0.48, 1.45, 0.55, 0.29 and 1.55), (0.60, 0.68, 0.87, 0.69 and 1.20) and (0.50, 0.82, 0.75, 0.57 and 1.10), respectively. The bias error less than 15% between averages of estimated and observed yields verified the results. These results were compared with K y obtained by FAO and other studies separately. There is a satisfactory correlation between K y calculated using this research and other studies.