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Articles by Elham Shirzad
Total Records ( 2 ) for Elham Shirzad
  Behafarid Darvish , Siamak Najarian , Elham Shirzad and Roozbeh Khodambashi
  In this study, we have proposed a new type of tactile sensor that is capable of detecting the stiffness of soft objects. The sensor consists of a brass cylinder with an axial bore. An iron core can easily move inside the bore. Three peripheral bobbins were machined in the cylinder around which three coils have been wound. One of the coils was excited with an alternating current which caused a voltage to be induced in two other coils. A return spring was used to return the core to its initial position after it has been moved. The sensor was pressed against the surface of the object whose stiffness was going to be measured. The position of the core in this state was depended on the stiffness of the given object and the spring constant and was measured by measuring the change in the induced voltage in secondary coils. The proposed sensor was capable of measuring two contact parameters namely the applied force and the stiffness of the object. Using the data of this sensor, three different objects, made of polyurethane, silicon rubber and paraffin gel were discriminated. Thus, this sensor could be used in robot hands and minimally invasive surgery tools to improve their operation.
  Asadollah Divsalar , Mehdi Yousefian , Elham Shirzad and M. Beigum Nourozian Amiri
  The purpose of this study is to determine energy consumption of output and input and investigated their effects on ecosystem in a tourism zone in North of Iran. We are interest to know how much energy produce and how much of them consumed. The Mazandran province in South part of Caspian Sea has main potential for production with suitable land, enough water and good soil. The first part of our discussion is about agri-food sector that have important part in economic development because of its great role on public health. In this area, the most cultivation product is related to industry products with 38.6%. In fish culture sector Mazandaran has 664 numbers of warm water fish culture with beneficial extent of 2362 ha warm water fish, 26.6 ha cold water fish and 12678 ha natural resource. Recently by increasing the population in this area, the ground which allocated to build houses, increased about 24%. To substitute the land for building, a part of forest and agricultural area were used. By comparing the data during a decade about 360 ha of green land were used for this purpose. The population growth leads to increasing demand for food and shelter. In this respect the area for compensate the increase population just during two recent year is estimated to be 670 ha. On the other hand traveling to Mazandran province to use its favorite weather is increasing, therefore energy consumption is increased. All of these trend results in increase demand for fuel consumption and CO2 generated.
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