Islamic Azad University at Ardestan
Ardestan, Iran
Time filter
Source Type

Nasri M.,Islamic Azad University at Ardestan | Sardoo F.S.,Jiroft University
World Academy of Science, Engineering and Technology | Year: 2011

Flood is a natural demolishing phenomenon, forecast of which is of high importance. Estimation of rainfall-runoff and flood is a difficult task due to influence of different factors. So far, different methods have been proposed to analyze such phenomena. This study was conducted in the basin of Sheikh Bahaei Dam in Isfahan Province to prioritize areas influencing the flood peak discharge or in other words, to specify areas with highest flood potential. HEC-HMS hydrological model was used to simulate the flow in the hydrological units of the area. The results showed that areas near the output point of the basin play the highest role in flood development and should be placed in the first priority of watershed management. The results can remarkably contribute to the monitoring system of the area.

Nasri M.,Islamic Azad University at Ardestan | Soleimani A.,Consulting Engineer Company
World Academy of Science, Engineering and Technology | Year: 2011

Since water resources of desert Naein City are very limited, a approach which saves water resources and meanwhile meets the needs of the greenspace for water is to use city's sewage wastewater. Proper treatment of Naein's sewage up to the standards required for green space uses may solve some of the problems of green space development of the city. The present paper closely examines available statistics and information associated with city's sewage system, and determines complementary stages of sewage treatment facilities of the city. In the present paper, population, per capita water use, and required discharge for various greenspace pieces including different plants are calculated. Moreover, in order to facilitate the application of water resources, a Crude water distribution network apart from drinking water distribution network is designed, and a plan for mixing municipal wells' water with sewage wastewater in proposed mixing tanks is suggested. Hence, following greenspace irrigation reform and complementary plan, per capita greenspace of the city will be increased from current amount of 13.2 square meters to 32 square meters.

Emadi J.,Islamic Azad University at Ardestan | Hashemi S.H.,Arak University
World Academy of Science, Engineering and Technology | Year: 2011

The use of fiber reinforced plastics (FRP) in repairing and strengthening RC beams has been researched in recent years. In particular, attaching unidirectional FRP to the tension face of RC beams has provided an increase in stiffness and load capacity of the structure. However, due to the brittle nature of unidirectional FRP, the ductility of the beam decreases. Consequently, the safety of the structure is compromised due to the reduction in ductility. The purpose of this research is to investigate the behavior of high strength reinforced concrete beams strengthened with FRP sheets. The major test variables were included the different layouts of CFRP sheets and tensile reinforcement ratio. More particularly, the change in strength and ductility of the beams as the number of FRP layers and tensile reinforcement bar ratio are altered is investigated. Six underreinforced concrete beams were fabricated and tested to failure. With the exception of the control beam, one or four layers of CFRP were applied to the specimens.

Barati S.,Islamic Azad University at Ardestan | Rayegani B.,Islamic Azad University at Ardestan | Saati M.,Islamic Azad University at Ardestan | Sharifi A.,University of Tehran | Nasri M.,Islamic Azad University at Ardestan
Egyptian Journal of Remote Sensing and Space Science | Year: 2011

Quantitative estimation of canopy biophysical variables are very important in different studies such as meteorology, agriculture and ecology, so knowledge of the spatial and temporal distribution of these variables would be highly beneficial. Meanwhile, remote sensing is known as an important source of information to estimate fractional vegetation cover in large areas. Today spectral indices have been very popular in the remote sensing of vegetation features. But often reflections of soil and rocks are much more than reflections of sparse vegetation in these areas, that makes separation of plant signals difficult. So in this study measured fractional vegetation cover of a desert area were evaluated with 20 vegetation indices in five different categories as the most appropriate category, or indicator for desert vegetation to be identified. The five categories were including: (1) conventional ratio and differential indices such as NDVI; (2) indices corrected and derived from the traditional indicators such as NDVIc and GNDVI; (3) soil reflectance adjusted indices such as SAVI; (4) triangle indices based on three discreet bands in their equation (Green, Red and NIR) like TVI; and (5) non-conventional ratio and differential indices such as CI. According to the results of this research, DVI index with 0.668 the coefficient of determination (R2) showed the best fractional vegetation cover estimation. But according to the sparse vegetation in desert areas and the results of this research it seems none of these indicators alone can accurately estimate the percentage of vegetation cover, however, to do a proper estimation it is possible to enter data of these indices in a multivariate regression model. Using this method enabled us to increase the coefficient of determination of fractional vegetation cover estimation model up to 0.797. © 2011 National Authority for Remote Sensing and Space Sciences. Production and hosting by Elsevier B.V. All rights reserved.

Nejati Hafdani F.,Islamic Azad University at Ardestan | Sadeghinia N.,Islamic Azad University at Ardestan
World Academy of Science, Engineering and Technology | Year: 2011

In recent years application of natural antimicrobials instead of conventional ones, due to their hazardous effects on health, has got serious attentions. On the basis of the results of different studies, chitosan, a natural bio-degradable and non-toxic biopolysaccharide derived from chitin, has potential to be used as a natural antimicrobial. Chitosan has exhibited high antimicrobial activity against a wide variety of pathogenic and spoilage microorganisms, including fungi, and Gram-positive and Gramnegative bacteria. The antimicrobial action is influenced by intrinsic factors such as the type of chitosan, the degree of chitosan polymerization and extrinsic factors such as the microbial organism, the environmental conditions and presence of the other components. The use of chitosan in food systems should be based on sufficient knowledge of the complex mechanisms of its antimicrobial mode of action. In this article we review a number of studies on the investigation of chitosan antimicrobial properties and application of them in culture and food mediums.

Dalvi M.,Islamic Azad University at Ardestan | Hamdami N.,Isfahan University of Technology
Journal of Agricultural Science and Technology | Year: 2011

Information on the thermophysical properties of the Iranian ultrafiltrated (UF) white cheese is very limited. In this research, those thermal properties determined experimentally were thermal conductivity, specific heat, density and water activity. The thermal conductivity and specific heat of Iranian ultrafiltrated white cheese (IUFWC) ranged from 0.447 to 0.480 W m-1 °C-1 and from 3.871 to 4.005 kJ kg-1 °C-1 for temperatures varying from 1°C to 23°C and from 1°C to 40°C, respectively. Both thermal conductivity and specific heat increased with moisture content and temperature. A three-step model predicting thermal conductivity as a function of cheese composition and temperature was developed based on the parallel and Maxwell models. The effective thermal conductivity predicted by the model developed was in good agreement with the experimental data. The modeling of density and water activity using non-linear regression concepts showed that density was highly affected by salt concentration and temperature; water activity was also strongly dependent on salt concentration and moisture content.

Iravani H.,Islamic Azad University at Ardestan | Elahehmirsafaei,Islamic Azad University at Ardestan | Mahtabfakhri,Islamic Azad University at Ardestan
Journal of Engineering and Applied Sciences | Year: 2016

Dynamic art continuous in search of new ways for the obtain various innovations as every art in itself of place and community and other factors influenced art sin relation to each other directly and affected indirect. Rhythm, the common factor is that in each of the arts particularly music and architecture revealed explains their presence. © Medwell Journals, 2016.

Hekmatpanah M.,Islamic Azad University at Ardestan
World Academy of Science, Engineering and Technology | Year: 2011

The manufacturing is currently being used as a continuous quality improvement tool, providing a planning, implementing, monitoring and evaluating framework for the quality improvement measures on a sustainable basis. An causeand-effect diagram, also known as a Ishikawa diagram or fishbone diagram, is often used in quality management in manufacturing Industries. Fishbone diagram (also known as Ishikawa diagram) was created with the goal of identifying and grouping the causes which generate a quality problem. Gradually, the method has been used also to group in categories the causes of other types of problems which an organization confronts with. This made Fishbone diagram become a very useful instrument in risk identification stage. In this paper, with using the six sigma technique and cause-and-effect diagram is used to demonstrate how to relate potential causes of a major presenting problem in Sepahan oil company. For this purpose, the four liter production line of the company has been selected for investigation. The findings imply that the application of cause-and-effect diagram has reduced the scraps from 50000 to 5000 ppm and has resulted in a 0.92% decrease of the oil waste.

Hekmatpanah M.,Islamic Azad University at Ardestan
World Academy of Science, Engineering and Technology | Year: 2011

Since the beginning of human history, human activities have caused many changes in the environment. Today, a particular attention should be paid to gaining knowledge about water quality of wetlands which are pristine natural environments rich in genetic reserves. If qualitative conditions of industrial areas (in terms of both physicochemical and biological conditions) are not addressed properly, they could cause disruption in natural ecosystems, especially in rivers. With regards to the quality of water resources, determination of pollutant sources plays a pivotal role in engineering projects as well as designing water quality control systems. Thus, using different methods such as flow duration curves, dischargepollution load model and frequency analysis by HYFA software package, risk of various industrial pollutants in international and ecologically important Gavkhoni wetland is analyzed. In this study, a station located at Varzaneh City is used as the last station on Zayanderud River, from where the river water is discharged into the wetland. Results showed that elements' concentrations often exceeded the allowed level and river water can endanger regional ecosystem. In addition, if the river discharge is managed on Q25 basis, this basis can lower concentrations of elements, keeping them within the normal level.

Kadkhodaie A.,Islamic Azad University at Ardestan | Bagheri M.,Islamic Azad University at Ardestan
World Academy of Science, Engineering and Technology | Year: 2011

Evaluation of crop plants resistance to environmental stresses specially in germination stage is a critical factor in their selection in different conditions of cultivation. Therefore use of a procedure in controllable situation can help to evaluate plants reaction to stress quickly and precisely. In order to study germination characteristics of flax in water and salinity stress conditions were conducted two laboratories experimental. The two experimental were conducted in 4-replicant completing random design for salinity and water stress. The treatment, for salinity and water stress was three potential (zero, 40, 80 mM) of NaCl and three potential (zero, -2, -4 bar) of PEG respectively. Germination percentage and rate, in addition to Radical and plumule length and dry-weight and plumule/Radical ration were measured. All of characteristics reduce under water stress conditions. salinity stress significant reduce germination rate and Radical and plumule length of flax seeds. Hydropriming and osmopriming significant increased germination rate, plumule length and plumule/Radical ration ration of flax seeds. But germination percentage and Radical and plumule dry weight significant increased only in hydropriming treat. Hydropriming and osmopriming could not be used to improved germination under saline and drought stress. But has more tolerance in salinity and drought stress in flax by less reduce in Radical and plumule length under saline and drought stress.

Loading Islamic Azad University at Ardestan collaborators
Loading Islamic Azad University at Ardestan collaborators