PENDEKATAN SCIENCE, TECHNOLOGY, ENGINEERING, AND MATHEMATICS (STEM): DAMPAKNYA TERHADAP KEMAMPUAN PEMAHAMAN KONSEP MATEMATIS DAN LITERASI AL-QUR’AN

This study aimed to determine the effect of the STEM (Science, Technology, Engineering, and Mathematics) learning approach on the ability to understand mathematical concepts in terms of students' Al-Qur'an literacy. This research is a Quasy Experimental Design research with a 2×3 factorial research design. The data collection techniques in this study were in the form of a concept understanding test and an Al-Qur'an literacy questionnaire. The data analysis technique used is the normality test and homogeneity test, and the Two-way ANOVA test. Based on the results of the study, it was concluded that there was an effect of the STEM learning approach (Science, Technology, Engineering, and Mathematics) on the ability to understand students' mathematical concepts in the material of Building Flat Side Space. There is no influence of Al-Qur'an literacy on the ability to understand students' mathematical concepts in the material of Constructing Flat Sided Space. There is no interaction between the treatment of the STEM learning approach (Science, Technology, Engineering, and Mathematics) with the Al-Qur'an literacy category on the ability to understand mathematical concepts in the matter of Constructing Flat Sided Space.

PENGEMBANGAN LEMBAR KERJA PESERTA DIDIK (LKPD) BERMUATAN SOAL HIGH ORDER THINGKING SKILL (HOTS) PADA MATERI BANGUN RUANG SISI DATAR KELAS VIII SMP NEGERI 9 METRO

This study aims to find out the validity and practicality of Student 0 Worksheets (LKPD) Charged With High Order Thingking Skill (HOTS) In Class VIII Flat Side Room Building Materials. This type of research is a development research using addie development model (Analysis, Design, Development, Implementation, Evaluation). This research was conducted at SMP Negeri 9 Metro. The data collection instruments used were expert validation questionnaires to 9 validators and practicality test questionnaires to 10 students. The data obtained is then analyzed using validity analysis and product practicality analysis. The result of the development of this study is a Worksheet of Learners Charged With Higher Order Thinking Skills (HOTS) On Class VIII Flat Side Room Building Materials. This LKPD is equipped with HOTS-based questions. Validation results by material experts obtained a percentage of 85.09%, media experts obtained a percentage of 88.40% and linguists obtained a percentage of 86% and all three fall into the category of highly valid. Practicality assessment using student response questionnaires fall into the eligible category. The results of the assessment of the overall teaching materials can be concluded that the HOTS-charged LKPD on the building material of the grade viii flat side room is valid and practical and can be used in learning

Pengembangan Media Pembelajaran Buku Digital Interaktif Berbasis Pendekatan Matematika Realistik untuk Meningkatkan Kemampuan Spasial Siswa

This study aims to: 1) develop an interactive digital book learning media based on a realistic mathematics learning approach on the valid, practical, and effective flat-sided geometry material (cubes and blocks) so as to improve students' mathematical spatial abilities; 2) improve students' mathematical spatial abilities by using interactive digital books based on a realistic mathematics learning approach on the flat side (cube and block) material. This research is a development research using the ADDIE model. The validity of the interactive digital book learning media assessed by the validators in terms of three aspects, namely the quality of content and objectives, learning/instructional strategies, and media design obtained a total average of 3.73 ("valid" category). The practicality of learning media is seen from the observation score of learning implementation in the first trial, which is 2.87 (category "poorly implemented") so that the second trial is carried out and a score of 3.73 is obtained (category "well implemented"). The effectiveness of learning media in terms of four aspects, namely classical completeness, student activity observation scores, observations of teachers' ability to manage learning, and student responses. The classical mastery of the students' mathematical spatial ability in the second trial was 86.67% (13 students). The average percentage of achievement of the ideal time of student activity in the second trial for three meetings was 22.2%, 26.87%, 26.87%, 13.9%, 7.87%, and 2.32%. The average score for observing the teacher's ability to manage learning in the second trial was 3.79 ("good" category). The average student response in the second trial was 3.74 ("interested" category). Based on the normalized gain index, it was found that in the second trial there was an increase in the value with a score of 0.40 ("medium" criteria).

Pengembangan Media Pembelajaran Audio Visual Materi Bangun Ruang Sisi Datar di SMP Negeri 6 Mataram

The purpose of this research is to produce a learning audiovisual media that is suitable for the material of build a flat side room in SMP Negeri 6 Mataram. The method used in this research is according to Luther, is multimedia development life cycle (MDLC). MDLC have 6 steps, there are concept, design, material collecting, assembly, testing, and distribution. Field testing was used in this research are validation test, practical test, and test for the learning media’s effectiveness. In validation test, the result of this research is validated by some experts. The practical test was carried out by 2 practitioners and the test for effectiveness was based on the results of the questionnaire which were filled in by 74 students (37 students of class VIII and 37 students of grade IX). Instrumen indicators are based on the feasibility of the media according to Thorn. The results of the validation test showed an average score of 3.14, with a very good category. Meanwhile, the results of the practical test with an average score are 3.39 in the very good category, and the results of the effectiveness test with an average score of 2.86 in the good category. So it can be concluded that the audiovisual learning media that have been developed are suitable for use in learning mathematics.

Acute Effects of Different Plyometric and Strength Exercises on Balance Performance in Youth Weightlifters

Background: High-intensity muscle actions have the potential to temporarily improve the performance which has been denoted as postactivation performance enhancement.Objectives: This study determined the acute effects of different stretch-shortening (fast vs. low) and strength (dynamic vs. isometric) exercises executed during one training session on subsequent balance performance in youth weightlifters.Materials and Methods: Sixteen male and female young weightlifters, aged 11.3±0.6years, performed four strength exercise conditions in randomized order, including dynamic strength (DYN; 3 sets of 3 repetitions of 10 RM) and isometric strength exercises (ISOM; 3 sets of maintaining 3s of 10 RM of back-squat), as well as fast (FSSC; 3 sets of 3 repetitions of 20-cm drop-jumps) and slow (SSSC; 3 sets of 3 hurdle jumps over a 20-cm obstacle) stretch-shortening cycle protocols. Balance performance was tested before and after each of the four exercise conditions in bipedal stance on an unstable surface (i.e., BOSU ball with flat side facing up) using two dependent variables, i.e., center of pressure surface area (CoP SA) and velocity (CoP V).Results: There was a significant effect of time on CoP SA and CoP V [F(1,60)=54.37, d=1.88, p<0.0001; F(1,60)=9.07, d=0.77, p=0.003]. In addition, a statistically significant effect of condition on CoP SA and CoP V [F(3,60)=11.81, d=1.53, p<0.0001; F(3,60)=7.36, d=1.21, p=0.0003] was observed. Statistically significant condition-by-time interactions were found for the balance parameters CoP SA (p<0.003, d=0.54) and CoP V (p<0.002, d=0.70). Specific to contrast analysis, all specified hypotheses were tested and demonstrated that FSSC yielded significantly greater improvements than all other conditions in CoP SA and CoP V [p<0.0001 (d=1.55); p=0.0004 (d=1.19), respectively]. In addition, FSSC yielded significantly greater improvements compared with the two conditions for both balance parameters [p<0.0001 (d=2.03); p<0.0001 (d=1.45)].Conclusion: Fast stretch-shortening cycle exercises appear to be more effective to improve short-term balance performance in young weightlifters. Due to the importance of balance for overall competitive achievement in weightlifting, it is recommended that young weightlifters implement dynamic plyometric exercises in the fast stretch-shortening cycle during the warm-up to improve their balance performance.

Efforts to Improve Learning Outcomes Building Flat Side Rooms Through Offline Learning Model

This study aims to improve student’s learning outcomes on material Flat Sides Solid Figure using worksheet (LKPD) especially for 8th grade class-A student of SMP N 5 Sanggau. The method used was classroom action research. The subjects in this study were 8th grade class-A students. Data collection techniques used observation, measuring, and documentary studying techniques. The instruments used were written test. Based on the result, there is a significant improvement on student’s learning outcomes. It proved by the improvement numbers of student who passed the exam after 2nd Cycle. Which were improved from Pre-Cycle, 1st Cycle, 2nd Cycle are 34%; 73,08%; 92,30% while the averages are 69; 70,96; and 80,08. It proved that applying offline learning models with LKPD in covid-19 pandemic on mathematic will improved students’ learning outcomes. The learning process was morelively because students have a chance to build their own knowledges based on what they learned..

Charged throats in the Hořava–Lifshitz theory

A spherically symmetric solution of the field equations of the Hořava–Lifshitz gravity–gauge vector interaction theory is obtained and analyzed. It describes a charged throat. The solution exists provided a restriction on the relation between the mass and charge is satisfied. The restriction reduces to the Reissner–Nordström one in the limit in which the coupling constants tend to the relativistic values of General Relativity. We introduce the correct charts to describe the solution across the entire manifold, including the throat connecting an asymptotic Minkowski space-time with a singular 3+1 dimensional manifold. The solution external to the throat on the asymptotically flat side tends to the Reissner–Nordström space-time at the limit when the coupling parameter, associated with the term in the low energy Hamiltonian that manifestly breaks the relativistic symmetry, tends to zero. Also, when the electric charge is taken to be zero the solution becomes the spherically symmetric and static solution of the Hořava–Lifshitz gravity.