ارسل ملاحظاتك

ارسل ملاحظاتك لنا







الرئيسية > تحسين كفاءة حساب الصور الفونون...>الوصف

تحسين كفاءة حساب الصور الفونونية لبلورات GaP البيزوكهربائية

العنوان بلغة أخرى: Enhancement Efficiency of Calculation of the Phonon Images for Gap Piezoelectric Crystal
المصدر: مجلة التربية والعلم
الناشر: جامعة الموصل - كلية التربية
المؤلف الرئيسي: إبراهيم، عبير بدر (مؤلف)
المؤلف الرئيسي (الإنجليزية): Ibrahem, Abeer Bader
مؤلفين آخرين: حسين، ممتاز محمد صالح (م. مشارك)
المجلد/العدد: مج31, ع1
محكمة: نعم
الدولة: العراق
التاريخ الميلادي: 2022
الصفحات: 137 - 146
ISSN: 1812-125X
رقم MD: 1265032
نوع المحتوى: بحوث ومقالات
اللغة: العربية
قواعد المعلومات: EduSearch
مواضيع:
الفيزياء الكهربائية | الخصائص البيزوكهربائية | الاهتزازات البلورية
كلمات المؤلف المفتاحية:
الصور الفونونية | البلورات البيزوكهربائية | الصور الفونونية لـ GaP | البلورات المكعبة | حساب الصور الفونونية | Phonon Images | Piezoelectric Crystals | Phonon Images of Gap | Cubic Crystal | Calculation of Phonon Images
رابط المحتوى:

الناشر لهذه المادة لم يسمح بإتاحتها.
صورة الغلاف QR قانون
حفظ في:
المستخلص: The current study aimed to reveal the effect of employing Augmented Reality Technique in teaching science to develop motivation to learn and academic achievement among second-grade students of intermediate school in Afif Governorate in Saudi Arabia. The study followed the quasi-experimental approach. The sample consisted of (118) students. They were classified into two groups, based on their science marks during the first semester exam, where the study took place during the second semester. One of them was a control group consisted of (59) students who studied in the normal method and the other was an experimental group consisted of (59) students, who studied using augmented reality Technique. The two tools of the study were: a Motivation to learn scale, that was applied to the experimental group before and after teaching, and an achievement test that was applied to each of the control group and the experimental group after teaching. Through statistical processing, the study has reached the following results: There are statistically significant differences at the level of significance (α = 0.05) between the mean of the experimental group marks in the pre- and post-application on the total mark of motivation scale, on its six dimensions in favor of the post application, and Cohen's Coefficient “d” calculation shows that using Augmented reality in science teaching has a great impact on the development of each dimension of the motivation to learn and the overall scale. There are statistically significant differences at the level of significance (α = 0.05) between the mean marks of the control group and the experimental group in the post-application of the three levels, as well as the total mark of the achievement test, in favor of the experimental group, and Cohen's Coefficient “d” calculation shows that that employing augmented reality technique in science education has a great impact on developing the level of analysis and the test as a whole and has a moderate effect on developing levels of remembering, and understanding. According to these results, the study concluded with a number of recommendations, including: using (AR) technology in teaching, especially science teaching, and training of teachers in the Saudi Arabia on the skills of producing and employing (AR) technology in teaching.

In this paper an improved phonon imaging for GaP has been calculated, this crystal is one of III-V group. In the presence of piezoelectric properties, the computation treatment is based on increasing the number of points in the reduced Brillouin zone and increasing the size of the phonon image matrix. The phonon images can be calculated by large number of points in the reduced Brillouin zone which represent the wave vectors and these vectors can be transformed to group velocity vectors using Christoffel equation, these set of group velocity vectors can be projected in a certain direction to form the phonon image. A program was prepared in MATLAB language to calculate these images by determining the number of points in the reduced zone and determining the size of the matrix that represents the phonon images in addition to the direction of the projections. To calculate the phonon images in the presence of the effect of the piezoelectric properties, it is through the presence of the k44 factor, which indicated of the influence of the piezoelectric properties on the phonon images. The results showed that the size of the image matrix is more effective factor than the number of points in the reduced Brillouin zone especially when the number of points is greater than 8×105 points, and when the number of points less than 104 points all the obtained phonon images is not clear.
ISSN: 1812-125X

عناصر مشابهة


© 2024 المنظومة. جميع الحقوق محفوظة.