The IEEE 802.16m standard for Advanced mobile broadband wireless access provides a seamless application connectivity to other mobile and IP networks like UMTS, LTE and WLAN which are having great difference in terms of data transmission rate, Coverage, cost and supporting of service types. Emerging multimedia services like immersive environments, IPTV applications, video conferencing, and 3D virtual world requires reliable communication even in high mobility in heterogeneous network environment, denser area and in cell edges. Users’ mobility is a major factor which directly affects the performance of the Radio Resource Management (RRM). To ensure the Quality of Service (QoS) performances, we propose a Dynamic queue-aware Connection Admission Control (CAC) schemes, and a dynamic bandwidth reservation are considered at Base Station and Subscriber station for new and handoff calls. A queuing analytical framework is developed for this admission control schemes. The simulation results show the proposed RRM scheme is effective to increase the data throughput as well as to decrease the packet loss rate and packet delay to improve the user-perceived quality of service (QoS).
The most important stage in image processing and human activities recognition is the segmentation method. So many researchers give us many ideas and techniques but still there is no perfect technique to segment object and catch all requirement, Our contribution here is using spread seed technique to segment objects inside the image and expand regions of object if the object consist of different pixels intensity via using threshold of pixel intensity .changing values of threshold make this technique more reliable and distribute objects according to size of segment area then we can store the objects recognized by the size and image histogram for retrieve them to rearrange the objects within binary tree.
α-Amylase is an enzyme that acts as a catalyst for the hydrolysis of alpha-linked polysaccharides into α-anomeric products. The enzyme can be derived from a variety of sources, each with different characteristics. α-Amylase found within the human body serves as the enzyme active in pancreatic juice and salvia. α-Amylase is not only essential in human physiology but has a number of important biotechnological functions in various processing industries. the aim of this study is cloning and expression of α-Amylase gene of Human pancreatic amylase (amy2A)in Escherichia coli.to achieve this aim a gene coding for α-Amylase from NCBI was selected and amplified with specific primers and PCR.PCR product was cloned into a bacterial expression vector pET21-a . The recombinant plasmid was used to transform the bacterial expression strain BL21 and expression products were analyzed with SDS-PAGE, and Immunoblotting. Based on these results, the bacterial expression system successfully expressed α-Amylase.
α-Amylase is an enzyme that acts as a catalyst for the hydrolysis of alpha-linked polysaccharides into α-anomeric products(1). The enzyme can be derived from a variety of sources, each with different characteristics. α-Amylase found within the human body serves as the enzyme active in pancreatic juice and salvia. α-Amylase is not only essential in human physiology but has a number of important biotechnological functions in various processing industries. the aim of this study is cloning and expression of α-Amylase gene of Human pancreatic amylase (amy2A)in Escherichia coli.to achieve this aim a gene coding for α-Amylase from NCBI was selected and amplified with specific primers and PCR.PCR product was cloned into a bacterial expression vector pET21-a . The recombinant plasmid was used to transform the bacterial expression strain BL21 and expression products were analyzed with SDS-PAGE, and Immunoblotting. Based on these results, the bacterial expression system successfully expressed α-Amylase.
Study of clinical biomechanic of injured instrument vertebral column is restricted to qualitative consideration. Recently with helping Finite Element Method studies are done. Quantitative instrument evaluation injured instrument vertebral column have got new shape. At most of the biomechanical studies are done on the evaluation stability of implants and vertebral column (instrument), so for determining any stress distribution, in this research five pieces of posterior spinal implants system evaluated maximum von mises stress with using Finite Element Method and ANSYS software which including: Cotrel Dubousset Horizon, pedicular screw, made of titanium, pedicular screw, made of stainless steel, Cotrel Dubousset Horizon, laminar hook, pedicular hook, device for transvers traction, DTT hook and connecting rod , that all of them were made from titanium , in conditions without vertebra and in all loading conditions similar to biomechanic loading include: axial compression, flexion, lateral bending and axial rotation. In this research, quasi static safety factor of fixation devices determined between 3 to 6, so results of this study show that maximum Von Mises stress, at all loading conditions happen on the neck of the pedicular screws, in the blade of the hook and in the middle of the rod.
Wintering population status of the globally threatened Great Bustard Otis tarda is not well-understood in Iran. In current survey we investigated population status of Great Bustard in Mokryan region Northwest Iran from 2008 to 2010. This area is the most important habitat for this species in the country and includes three separate breeding and wintering grounds; Sootav, Qazlian and Yengija-Albolaq. Population assessment was based on regular monitoring in the wintering areas. In Sootav, maximum number of Great Bustards were observed in January 2009 (35 birds) and in Qazlian plain the highest number of birds were recorded in March 2010 (22 birds). The third habitat also supports the same number of Great Bustards in January. Results suggested that this areas Great Bustards don’t leave the breeding grounds and are resident to Mokryan region. Some measures are discussed for effective conservation of this species in the area.
Abstract The head is the most vulnerable part of the body during crash situations and is often involved in life-threatening injuries. The main purpose of the present work is to build and validate a numerical model of human head in order to evaluate pressure and stress distributions in bones and brain tissues due to impact. Furthermore, the Head Injury Criterion (HIC) and the recently proposed Head Impact Power (HIP) criterion were evaluated with respect to the relative motion between the skull and the brain. It was found that the influence of impact direction had a substantial effect on the intracranial response. Geometrical characteristics for the finite element model have been extracted from CT and MRI scanner images, while material mechanical characteristics have been taken from literature. The analysis is performed using the program Ansys 3D to evaluate the risk of head injury in impact. The model is validated by comparing the numerical results and the experimental results obtained by Nahum in 1977.