Abstract\nLearner-oriented education is a spectrum that extends from the interaction between learner and teacher to pure learner-oriented education. This study uses a descriptive-analytical methodology to explore the views of the three main contributors of learner-oriented education, namely, Jean-Jacques Rousseau, John Dewey, and Jean Piaget. This study is an attempt to find the positions of these three personalities on learner-oriented education spectrum. The findings of this study show that all three personalities supported learner-oriented education and emphasized on its many attributes. These attributes provide learner the freedom of experimentation, interaction, and participation based on his needs, motivation, interest, and willingness that are driven by his talents and understanding. Learner-oriented education is like a color spectrum. It starts at the light end (A) and turns darker as education moves on the spectrum toward the other end (B). Each one of the three contributors has a position on this spectrum.
The response of two wheat cultivars (Misr-1 and Sakha-93) to NaCl was studied to ameliorate salinity tolerance by CaCl2. Growth parameters and also glutathione (GSH) content in both cultivars under normal conditions were most likely similar. Nonetheless, NaCl at 75, 150 and 225 mM led to accumulation in lipid peroxides and H2O2 but decreased GSH; the effect was most pronounced in Sakha-93 particularly with increasing NaCl concentration. Catalase (CAT), peroxidase (POD), glutathione-S-transferase (GST) and glutathione reductase (GR) activities were increased in Misr-1 by 75 and 150 mM but inhibited in Sakha-93 by all concentrations. The alternative oxidase (AOX) responded differently to NaCl, there were decreases by 75 and 225 mM in Misr-1 and by 75 and 150 mM in Sakha-93. Nevertheless, 10 mM CaCl2 alleviated the impacts of NaCl, counterbalances in the accumulated peroxides and H2O2 and recoveries in the decreased GSH were mostly induced by CaCl2 particularly in Misr-1. These findings reveal that ROS scavenging is more efficient in Misr-1, the more tolerant cultivar. The response of AOX appeared to coincide with antioxidants so that the damage which was inflicted by NaCl can be ameliorated by over-expression of antioxidants especially with the presence of CaCl2.
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.