Penelitian ini bertujuan untuk menguji tingkat efektivitas media game berbasis Scratch terhadap nilai hasil belajar IPA dan juga untuk mengidentifikasi perbedaan nilai hasil belajar antara kelas yang menggunakan game berbasis Scratch dengan kelas yang pembelajarannya masih konvensional. Penelitian dilakukan di SDIT Al Firdaus Semarang. Sampel penelitian berjumlah 52 siswa kelas IV. Penelitian ini adalah penelitian kuantitatif dengan desain quasi experimental. Terdapat dua kelas, satu kelas menggunakan media game berbasis Scratch dan satu kelas lainnya pembelajaran dengan metode ceramah. Instrumen pengumpulan data berupa soal ujian awal dan ujian akhir tentang materi IPA. Hasil penelitian menunjukkan bahwa pembelajaran dengan menggunakan media game berbasis Scratch cukup efektif terhadap hasil belajar peserta didik kelas IV pada materi IPA. Hasil uji N-gain diperoleh nilai sebesar 75,67%. Sedangkan untuk uji t diperoleh nilai Sig. (2-tailed) sebesar 0,000, berarti ada perbedaan nilai hasil belajar antara pembelajaran konvensional dengan pembelajaran menggunakan game berbasis Scratch pada materi IPA. Hasil penelitian ini dapat memberikan kontribusi bahwa game berbasis Scratch bisa dijadikan salah satu media pembelajaran yang efektif dan bisa direkomendasikan dalam meningkatkan hasil belajar siswa.
In this paper, design, fabrication, and characterization new tunable microstrip antenna using photodiode as optical switching has been proposed. The proposed antenna is fabricated in FR-4 substrate 4.8 relative permittivity value. The dimension of the substrate is 47 mm × 75 mm × 1.6 mm. The measurement result indicates that, if photodiode unilluminated by Infrared (OFF state) the proposed antenna works at frequency 4400 MHz with S11 value -16 dB. Meanwhile, if photodiode is illuminated by Infrared (ON state), antenna works at a frequency of 4500 MHz with S11 value -15 dB. There was a shift of 100 MHz of resonant frequency and -1 dB in S11 value. The proposed antenna are more easily fabricated and the switching methods more simple than other techniques. Also, the cost is relatively cheaper than the other techniques of optical switching.
The design, fabrication, and measurement of reconfigurable antenna using photodiode switches have been investigated. The IntroductionAntenna is a basic component in communication system. It is very important and needed in communication system, specifically wireless communication system which has been running remarkably and dynamic. It causes the increase demand of antennas. Communication system which is generally complex needs antennas which have advance capabilities and good performances. So, many researchers have conducted experiments attempting to improve capabilities and performances of antenna in order to meet the need of communication system which grows continuously.One type of antenna which is able to accommodate the change of communication system necessity is reconfigurable antenna [1]. Such an antenna is able to adjust with the necessity of the communication system. In some ways it can convert operating frequency, radiation pattern, impedance, bandwidth via shorting/reactive loading to require resonant mode switching, by moving part (mechanical reconfiguration), optical switching, electronic switching, and feed network switching. Due to the fact that reconfigurable antenna adjustable, this antenna can eliminate the need of multiple antenna for communication systems.An innovative approach to the synthesis of phase-only reconfigurable, isophoric linear sparse arrays has been investigated in previous research [2]. The result shows the abilility to commute their pattern within an arbitrary number of radiation modalities which leads to an effective procedure for the fast antennas design with high performance. In other research, presenting at [3][4][5], mentioned that reconfigurable antenna were fabricated on high-resistivity silicon and equipped with two silicons as material switches. Then the laser was used to control the photoconductive switching material. The technique is conducted to prove that changes of effective length of antenna, it can change antenna resonance frequency. However, using silicon as photoconductive switches will require complicated technique during it insertion process on antenna substrate and silicon has high cost. Other techniques, is done previously by Kiriazi et al. in [6]. In this work, open and short of RF-MEMS switches were assembled on antenna which has a high-resistivity silicon substrate. In [7], varactor diode is used as switches. The other switching elements which are PIN diodes [8][9][10][11][12][13], an air gap [14][15], solar cell [16], and photodiode [17] have also been used at previous research. Therefore, in this paper we introduce a new optical switches geometry and technique of reconfigurable antennas by using photodiode as optical switching.
Penelitian ini bertujuan untuk mendeskripsikan penggunaan dan tantangan dalam pembelajaran tematik terintegrasi STEAM (Science, Technology, Engineering, Arts, Mathematics) di kelas IB MI Al Bidayah Candi Bandungan, Kabupaten Semarang. STEAM merupakan pembelajaran yang mengintegrasikan ilmu pengetahuan dan seni. Metode yang digunakan dalam penelitian ini adalah deskriptif dengan melakukan observasi, wawancara, dan dokumentasi. Penelitian ini melibatkan siswa kelas IB MI Al Bidayah Candi yang mana sudah menerapkan pembelajaran dengan STEAM. Hasil penelitian menunjukkan bahwa penggunaan pembelajaran tematik terintegrasi STEAM sudah berhasil. Siswa terlibat aktif dalam kegiatan eksplorasi, esksperimen, dan kolaboratif. Tantangan yang dihadapi diantaranya sumber daya kurang, kurangnya pelatihan STEAM yang diintegrasikan dengan kurikulum, kurangnya waktu dalam mengelola penilaian. Peneliti merekomendasikan untuk meningkatkan pembelajaran tematik terintegrasi STEAM. Rekomendasi tersebut berupa peningkatan pelatihan guru dalam menggunakan STEAM, pengembangan sumberdaya dan sarana yang memadai, dan pengembangan strategi untuk mengevalusi sesuai dengan pendekatan tematik. Kata Kunci: pembelajaran tematik, STEAM, implementasi, tantangan PENDAHULUANGuru merupakan faktor pembangun serta pembangkit dalam dunia pendidikan.Proses dalam mengembangkan potensi peserta didik merupakan salah satu tujuan pokok seorang guru yaitu menjadikan bisa dari ketidakbisaan peserta didik. Guru akan memberikan segala bentuk pelayanan terbaik dengan memberikan berbagai macam fasilitas agar peserta didik mampu selaras mencapai tujuan pendidikan. Hal ini senada dengan pendapat Askhabul Kirom (2017: 69) bahwa guru akan memberikan bentuk pelayanan terbaik untuk peserta didik. Guru atau pendidik memegang peranan penting dalam pembelajaran karena guru diibaratkan seorang nahkoda yang membandu pelayaran pendidikan peserta didik (Suprihatin dan Yuni, 2020: 65). Muhammad Anwar (2018: 54) menyatakan bahwa guru memiliki tugas membimbing, menginspirasi, dan membantu peserta didik mencapai potensi terbaik mereka.
Learning in society 5.0 and the covid-19 pandemic requires several skills to be mastered, both by students and teachers. These skills are creativity, critical thinking, communication, collaboration, compassion, and computational thinking (6C). This paper describes the training carried out on teachers to improve computational thinking skills. A teacher must master computational thinking to prepare the next generation of potential, superior, and ready to face the era of society 5.0. The training target is MI teachers in Pabelan District, totaling 26 teachers. The training was divided into several stages, including a pretest, material presentation, practice working on logarithmic problems, creating a Bebras account, tutorial on making games using scratch software, and posttest. At the end of the activity, participants are asked to fill out a presence link as a condition to get a certificate. The training results showed that most of the participants could understand and implement computational thinking. It can be seen from the results of the posttest given. Participants were very enthusiastic and active in participating in the training. They were also happy because follow-up activities after the training were completed.
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