MODEL PEMBELAJARAN BAHASA ARAB YANG TERFOKUS PADA SISWA (STUDENT-CENTERED LEARNING/SCL)

This paper would like to descripte the characteristics of learning that focused on the learners, the benefits, the weaknesses and the steps of its use to achieve the goal of learning Arabic. Learning model is an important part which is understood by every Arabic teacher to be able to present the condition of learning that is always fun for learners. An effective model for learning in Arabic is the learning model that concentrated to student. The use of this learning model is believed to be able to improve the four competencies of Arabic learners, namely the ability to speak, write, read and hear. For this reason, an Arabic teacher must understand the various variants of an effective learning model which centered on the learning potential of students in order to present the materials in an enjoyable. Therefore, it is important for any Arabic teacher to change the teacher-centered paradigm which is conventional teaching towards a modern learning paradigm which centered to the creative ability of students during the Arab learning proccess. The use of learning models which focused to learners in Arabic learning should be supported by teacher innovation that can empower learners to be active during learning. In addition, the teacher seeks to construct the latest Arabic material by utilizing the technology media relevant to the progress of the global education world, especially in learning Arabic as the language of the Islamic world and religious language.

Modeling and Simulations of Meta-Material Based Microwave Devices

Dual layer periodically patterned metamaterial inspired antennas on a low cost FR4 substrate are designed and simulated. Some of the designed antennas are also fabricated and tested. Eigen mode dispersion simulations are performed indicating the left handed metamaterial characteristics and are tunable with substrate permittivity. We present the design and simulations of dispersion engineered single unit cell resonant metamaterial (MTM) antenna with proximity feed. The antenna is also investigated with top metascreens made of the same MTM unit cell. The use of metascreens give enhanced antenna performance. A multiband operation with wideband characteristics can be enabled by using proximity type of input feeding. We further simulate, fabricate and test MTM antennas by extending the unit cells along the non-resonant length of the antenna and use a direct type of input feed instead of proximity feed. Again metascreen is applied below the proposed MTM antenna and next used as superstrate above a simple patch to study the effects on bandwidth, gain, efficiency and radiation patterns. The experimental results of these antennas are very good and closely match with the simulations. The radiation patterns are also very good and could be useful in the UWB wireless applications.Next, we present modeling and simulations of an absolute magnifying device in a geometrical sense at microwave frequencies. The device is designed and simulated based on a graded positive refractive index, non-resonant, weakly dispersive region of the I-shaped metamaterial structure at 10 GHz. The structure is simple and easy to fabricate. Its geometrical parameters are varied along with different dielectric powders as a background material, which provide a wide spectrum of graded refractive indices needed for proper device functionality. The complete 30 layer device is first simulated based on I-shape refractive index and then it is simulated with I-shape structure itself inserted into a significant portion of the device. The results show the bending and magnification process reasonably. It demonstrates an Eaton lens like functionality with twice magnification factor.