Jurnal Kumparan Fisika最新文献

{"title":"ANALISIS VALIDASI MEDIA PEMBELAJARAN E-BOOK BERBASIS FLIP PDF PROFESSIONAL PADA MATERI GELOMBANG BUNYI DI SMA","authors":"Tiya Andani","doi":"10.33369/jkf.4.3.213-220","DOIUrl":"https://doi.org/10.33369/jkf.4.3.213-220","url":null,"abstract":"ABSTRAK Penelitian ini dilakukan dengan tujuan untuk menghasilkan media E-book berbasis Flip PDF Professional yang layak digunakan sebagai media pembelajaran pada materi gelombang bunyi kelas XI SMA. Penelitian yang dilakukan merupakan penelitian Research and Development (R&D) dengan pendekatan 4-D yang meliputi tahap pendefinisian (define), tahap perancangan (design), tahap pengembangan (develop) dan tahap penyebaran (disseminate). Pada penelitian ini hanya dibatasi pada tahap pengembangan saja dikarenakan adanya keterbatasan waktu. Analisis data yang dilakukan pada penelitian ini adalah berdasarkan hasil skor penilaian uji kelayakan media E-book yang telah diberikan oleh validator ahli materi dan validator ahli media. Dari hasil skor penilaian uji kelayakan ahli materi diperoleh hasil sebesar 4,47 dari skor maksimum 5 atau sebesar 83% dengan kategori sangat layak. Sedangkan  hasil skor penilaian uji kelayakan ahli media diperoleh hasil sebesar 4,73 dari skor maksimum 5 atau sebesar 90% dengan kategori sangat layak. Berdasarkan hasil penelitian ini dapat disimpulkan bahwa media E-book berbasis Flip PDF Professional pada materi gelombang bunyi sangat layak digunakan sebagai salah satu alternatif media pembelajaran.Kata Kunci— Media Pembelajaran, E-Book, Flip PDF Profesional, Gelombang BunyiABSTRACT This research was conducted with the aim of producing an E-book based on Flip PDF Professional which is suitable for use as a learning medium for sound wave material for class XI SMA. The research conducted is a Research and Development (R&D) research with a 4-D approach which includes the definition stage, the design stage, the development stage and the dissemination stage. In this study, it was only limited to the development stage due to time constraints. The data analysis carried out in this study was based on the results of the E-book media feasibility test assessment scores that had been given by material expert validators and media expert validators. From the results of the assessment score of the material expert's feasibility test, the results obtained were 4.47 from a maximum score of 5 or 83% in the very feasible category. While the results of the assessment score of the media expert's feasibility test obtained a result of 4.73 from a maximum score of 5 or 90% with a very feasible category. Based on the results of this study, it can be concluded that the E-book media based on Flip PDF Professional on sound wave material is very feasible to be used as an alternative learning media.Keywords— Learning Media, E-Book, Professional PDF Flip, Sound Wave","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122968030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pengembangan Laboratorium Virtual Berbasis Website di Kelas X Teknik Komputer dan Jaringan (TKJ)","authors":"Dara Riska, Afrizal Mayub, Rosane Medriati","doi":"10.33369/jkf.4.3.193-202","DOIUrl":"https://doi.org/10.33369/jkf.4.3.193-202","url":null,"abstract":"ABSTRAK Penelitian ini bertujuan untuk mendeskripsikan pengembangkan dan kelayakan media pembelajaran laboratorium virtual berbasis website pada materi suhu dan kalor kelas X TKJ SMKN 3 Kota Bengkulu. Penelitian ini merupakan penelitian dan pengembangan (R & D) dengan metode 4D namun hanya sampai pada tahap 3D. Proses pengembangan terdiri dari tahap pendefinisian atau define, perancangan atau design, dan pengembangan atau develop. Hasil validasi menunjukkan bahwa media pembelajaran laboratorium virtual berbasis website ini dikategorikan sangat layak digunakan dengan kriteria  87,5%. Persentase tersebut merupakan rata-rata dari aspek format = 85,41% dengan kriteria sangat layak; aspek ilustrasi = 86,1% dengan kriteria sangat layak; aspek bahasa = 85,41% dengan kriteria sangat layak; dan aspek isi = 91,67% dengan kriteria  sangat layak. Dengan demikian dapat disimpulkan bahwa media pembelajaran laboratorium virtual berbasis website pada materi suhu dan kalor memenuhi kriteria dengan kualitas sangat layak sebagai salah satu media pembelajaran yang digunakan peserta didik kelas X SMKN 3 Kota Bengkulu. Kata kunci: Pengembangan, laboratorium virtual, website, suhu dan kalor ABSTRACT The purpose of this research was to described development and appropriateness of virtual laboratory learning method based on website on temperature and heat theory class X TKJ SMKN 3 Kota Bengkulu. This research was research and developing ( R & D ) with 4D method has been modified to 3D. Development process consist of definiton phase or define, design phase or design,  and development or develope. Validation result indicated this virtual laboratory learning method based on website categorized very appropriate to use with criteria 87,5 %. That percentage was average from format aspect = 85,41% with criteria very appropriate; illustration aspect = 86,1% with criteria very appropriate; language aspect = 85,41% with criteria very appropriate; and content aspect = 91,67% with criteria very appropriate. Therefore can be concluded that virtual laboratory learning method based on website on temperature and heat theory fulfilled the criteria with very appropriate qualityas one of the learning method used by student class X TKJ SMKN 3 Kota Bengkulu. Keyword: Development, virtual laboratories, websites, temperature and heat","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130018749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PENGEMBANGAN E-MODUL BERBASIS WEB SEBAGAI BAHAN AJAR FISIKA PADA MATERI GELOMBANG BUNYI DI SMA","authors":"Miya Novitasari, Connie Connie, E. Risdianto","doi":"10.33369/jkf.4.3.203-212","DOIUrl":"https://doi.org/10.33369/jkf.4.3.203-212","url":null,"abstract":"ABSTRAK Penelitian ini merupakan penelitian dan pengembangan (R&D) yang bertujuan untuk menghasilkan e-modul berbasis web sebagai bahan ajar fisika pada materi gelombang bunyi. Model pengembangan yang digunakan yaitu model 3 D dengan langkah-langkah Define, Design, dan Develop. Tahap define terdiri dari observasi, identifikasi masalah, dan pengumpulan data. Pada tahap design terdiri dari memilih media pembelajaran, memilih format bahan ajar, dan rancangan awal bahan ajar elektronik. Tahap develop terdiri dari validasi judgement ahli (dosen) dan praktisi (guru). Subjek penelitian adalah peserta didik SMAN 2, 4 dan 6 Kota Bengkulu. Validasi dilakukan oleh 2 judgement ahli dan 2 praktisi untuk menilai produk yang dikembangkan dari aspek isi, penyajian, bahasa dan media. Berdasarkan hasil uji validasi, aspek isi sebesar 79% dengan kategori sangat baik, aspek penyajian sebesar 77% dengan kategori sangat baik, aspek bahasa sebesar 79% dengan kategori sangat baik dan aspek media sebesar 75% dengan kategori baik. Berdasarkan hasil tersebut, dapat disimpulkan bahwa e-modul berbasis web yang dihasilkan sudah layak diuji cobakan dengan persentasi rata-rata sebesar 78% yang termasuk dalam kategori sangat baik. Kata  Kunci:  Pengembangan E-modul, Bahan Ajar, Gelombang Bunyi ABSTRACT This research was a research and development (R&D) that aimed to produce web-based e-modules as physics teaching materials on sound wave material. The development model used was a 3 D model with Define, Design, and Develop steps. The define stage consists of observation, problem identification, and data collection. At the design stage consists of choosing learning media, choosing the format of teaching materials, and the initial design of electronic teaching materials. The develop phase consists of validating expert judgment (lecturers) and practitioners (teachers). The research subjects were students of SMAN 2, 4 and 6 Bengkulu City. Validation was carried out by 2 expert judgments and 2 practitioners to assess products developed from the aspects of content, presentation, language and media. Based on the results of the validation test, the content aspect was 79% with a very good category, the presentation aspect was 77% with a very good category, the language aspect was 79% with a very good category and the media aspect was 75% with a good category. Based on these results, it can be concluded that the resulting web-based e-module was worth testing with an average percentage of 78% which was included in the excellent category.Keywords: Development of E-modules, Teaching Materials, Sound Waves","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125110274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PENGEMBANGAN MODUL SUHU DAN KALOR DENGAN PENDEKATAN SAINTIFIK UNTUK MELATIHKAN LITERASI SAINS PESERTA DIDIK DI SMA","authors":"Heni Fadilah, Dedy Hamdani, A. Purwanto","doi":"10.33369/jkf.4.3.185-192","DOIUrl":"https://doi.org/10.33369/jkf.4.3.185-192","url":null,"abstract":"ABSTRAK Penelitian ini bertujuan untuk: 1) mengembangkan modul suhu dan kalor dengan pendekatan saintifik untuk melatihkan literasi sains peserta didik di SMA; 2) mengetahui karakteristik modul suhu dan kalor yang dikembangkan dengan pendekatan saintifik untuk melatihkan literasi sains peserta didik di SMA; dan 3) mengetahui kelayakan penggunaan modul suhu dan kalor dengan pendekatan saintifik untuk melatihkan literasi sains peserta didik di SMA. Penelitian ini dilakukan dengan desain 4-D yang memiliki empat tahap yaitu tahap Define (Pendefinisian), Design (Perancangan), Develop (Pengembangan, dan Desseminate (Penyebaran), namun pada penelitian ini hanya dilaksanakan sampai tahap Develop. Instrumen penilaian yang digunakan dalam penelitian ini adalah lembar validasi ahli yang berisi aspek materi, aspek karakteristik modul, aspek bahasa dan aspek media. Adapun karakteristik modul yang dikembangkan, terdapat langkah pendekatan saintifik pada konsep dan lembar kegiatan mandiri. Terdapat soal teori, soal hitungan dan soal literasi sains untuk melatihkan kemampuan literasi sains peserta didik. Berdasarkan hasil uji validasi produk oleh ahli diperoleh skor rata-rata dengan persentase 75% untuk aspek materi, 84,37% untuk aspek karakteristik modul, 83,33% untuk aspek bahasa, dan 79,16% untuk aspek media, sehingga total skor rata-rata adalah 80,46% yang termasuk ke dalam kategori sangat baik. Dengan demikian modul suhu dan kalor dengan pendekatan saintifik untuk melatihkan literasi sains peserta didik di SMA menjadi produk jadi yang layak digunakan untuk uji lapangan. Kata kunci: Suhu dan kalor, pendekatan saintifik, literasi sains                                                                                              ABSTRACT This research aimed to: 1) develop a temperature and heat module with a scientific approach to train students' scientific literacy in high school; 2) find out the characteristics of the temperature and heat module that was developed with a scientific approach to practicing scientific literacy of students in high school; and 3) determine the feasibility of using a temperature and heat module with a scientific approach to practice scientific literacy of students in high school. This research was carried out with 4-D design that had four stages, namely the Define, Design, Develop and Desseminate stages, but in this research it was only carried out until the Develop stage. This is an expert validation sheet that contains material aspects, aspects of module characteristics, language aspects and media aspects, while the module characteristics are developed, there is a scientific approach to the concepts and independent activity sheets, there are theoretical questions, calculation questions and scientific literacy questions to practice the ability of students. Based on the results of the product validation test by the expert obtained an average score of 75% for the material aspect, 84.37% for the module characteristic aspect, 83.33% f","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"270 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114098736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"HUBUNGAN PENGUASAAN KONSEP DAN SIKAP ILMIAH PESERTA DIDIK DALAM PEMBELAJARAN BERBASIS LABORATORIUM VIRTUAL DI MASA PANDEMI COVID-19","authors":"I. pratiwi","doi":"10.33369/jkf.4.3.177-184","DOIUrl":"https://doi.org/10.33369/jkf.4.3.177-184","url":null,"abstract":"Penelitian ini bertujuan untuk mengetahui hubungan penguasaan konsep dan sikap ilmiah peserta didik dalam pembelajaran berbasis laboratorium virtual pada materi Dinamika Gerak. Metode penelitian yang digunakan adalah pre experimental dengan desain one-group pretest-posttest. Penelitian dilaksanakan pada semester genap tahun ajaran 2020/2021 di salah satu Madrasah Aliyah (MA) kota Prabumulih. Populasi penelitian ini adalah seluruh kelas X IPA, yakni sebanyak tiga kelas, dengan satu kelas sampel yang diambil dengan teknik purposive sampling. Data kuantitatif penguasaan konsep diperoleh melalui pemberian tes secara online dengan bentuk pilihan ganda. Tes diberikan sebanyak dua kali, yakni pre-test dan post-test. Data kuantitatif sikap ilmiah didapat melalui lembar observasi yang diamati selama kegiatan pembelajaran berlangsung. Berdasarkan hasil penelitian diperoleh informasi bahwa terdapat hubungan penguasaan konsep dan sikap ilmiah peserta didik dalam pembelajaran berbasis laboratorium virtual pada materi Dinamika Gerak.","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134159143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RANCANG BANGUN PROTOTIPE DETEKTOR HUJAN SEDERHANA BERBASIS RAINDROP SENSOR MENGGUNAKAN BUZZER DAN LED","authors":"Nailatul Fauza","doi":"10.33369/jkf.4.3.163-168","DOIUrl":"https://doi.org/10.33369/jkf.4.3.163-168","url":null,"abstract":"Indonesia adalah negara dengan iklim tropis yang memiliki dua musim yaitu musim hujan dan musim kemarau dimana kedua musim ini sulit untuk diprediksi kedatangannya. Penelitian ini bertujuan untuk merancang dan membuat alat pendeteksi hujan sederhana berbasis raindrop sensor menggunakan buzzer dan LED. Rancang bangun prototipe detektor hujan sederhana ini dilengkapi dengan raindrop sensor sebagai sensor hujan serta buzzer dan LED sebagai outputnya. Penelitian ini menggunakan metode penelitian Research and Development. Adapun tahap pengembangan dalam penelitian ini meliputi perencanaan, produksi, dan evaluasi. Alat detektor hujan ini terdiri atas komponen-komponen elektronika, yaitu raindrop sensor, buzzer, LED, transistor dan sakelar. Selanjutnya, dilakukan pengujian alat secara keseluruhan untuk melihat apakah alat berfungsi sesuai dengan tujuan. Dari hasil pengujian yang dilakukan membuktikan alat yang dibuat dapat berfungsi dengan baik ketika ada air hujan terbukti ketika sensor hujan mendeteksi adanya hujan maka buzzer akan mengeluarkan suara dan LED-nya menyala. Dari hasil pengujian menunjukkan intensitas bunyi pada buzzer yang berbeda-beda tergantung dari tingkat kelembaban PCB-nya, hal ini dapat disimpulkan bahwa semakin basah PCB nya, semakin besar pula intensitas bunyi pada buzzer-nya.","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122327580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PENENTUAN KONSTANTA PEGAS MENGGUNAKAN APLIKASI PHYPHOX PADA PERISTIWA OSILASI PEGAS","authors":"Herliana Ariyanti Ewar, Marselina Erisna Bahagia, Valeria Jeluna, R. B. Astro, Adrianus Nasar","doi":"10.33369/jkf.4.3.155-162","DOIUrl":"https://doi.org/10.33369/jkf.4.3.155-162","url":null,"abstract":"Penelitian ini bertujuan untuk menentukan nilai konstanta pegas pada peristiwa osilasi pegas. Penelitian dilakukan  melalui  eksperimen menggunakan aplikasi phyphox menu spring pada smartphone. Pengumpulan data dilakukan secara manual dan elektronik pada smartphone data yang diperoleh berupa massa, pertambahan panjang pegas, periode dan frekuensi. Analisis data menggunakan persamaan regresi linear. Hasil penelitian menunjukan  nilai konstanta pegas 1 sebesar 7,424 N/m 0,00092, nilai konstanta pegas 2 sebesar 11,084 N/m 0,00078, dan nilai konstanta pegas 3 sebesar N/m0,0016. ","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122884459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ANALISIS UJI KARAKTERISTIK BIOETANOL DARI PISANG HUTAN TERHADAP VARIASI MASSA RAGI","authors":"Dady Sulaiman","doi":"10.33369/jkf.4.3.169-176","DOIUrl":"https://doi.org/10.33369/jkf.4.3.169-176","url":null,"abstract":"Biomass is one of the solutions for Indonesia to obtain energy because Indonesia has the potential for biomass like biodiesel and bioethanol. The biomass to be studied is Bioethanol. One of the main ingredients in the manufacture of bioethanol is forest bananas, where this type of banana is very easy to find in rural areas around the district of Bulungan. Forest bananas are a type of wild plant that grows in the forest and it’s not consumed by residents because there are many seeds in the banana. Therefore, forest banana waste is increasing due to the lack of utilization of the waste. Based on these problems, it is necessary to conduct research that aims to test the characteristics of bioethanol from forest bananas to the variation of yeast mass. The stages of the research method that will be done include several stages, namely 1) the manufacture of bioethanol, 2) the stage of measuring ethanol levels, and 3) the stage of testing the characteristics of bioethanol. The stages of bioethanol testing are characteristic tests, including: 1) Ethanol Content Analysis, 2) Water Content Analysis, 3) Density Analysis, 4) Specific Gravity and API Gravity Analysis, 5) Heat Value Analysis. Based on the research results obtained, the quality of bioethanol produced has the value of density and specific gravity in accordance with the quality standard of bioethanol which is 0.78 in yeast 3% of raw materials. The caloric value that has a close relationship with API Gravity is close to the maximum value of the bioethanol quality standard which is 3702.30 kcal/kg in yeast of 5%. The value of the largest ethanol content was obtained at the total yeast content of 5% which is 24.8%. The lowest water content value is obtained at the total yeast content of 3% which is 75%.","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116757101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PENGEMBANGAN LKPD BERBASIS DISCOVERY LEARNING BERBANTUAN SOFTWARE TRACKER PADA MATERI GERAK MELINGKAR UNTUK MENINGKATKAN PEMAHAMAN KONSEP PESERTA DIDIK","authors":"Sindi Permata Sari, P. Lubis, Sugiarti Sugiarti","doi":"10.33369/jkf.4.2.137-146","DOIUrl":"https://doi.org/10.33369/jkf.4.2.137-146","url":null,"abstract":"ABSTRAK Penelitian ini bertujuan untuk mengembangkan LKPD berbasis discovery learning berbantuan software tracker yang valid, praktis, dan memiliki efek potensial untuk meningkatkan pemahaman konsep peserta didik. Jenis penelitian ini adalah penelitian pengembangan (Research and Development) dengan menggunakan tahap pengembangan model Rowntree yang memuat tahap perencanaan, tahap pengembangan, dan tahap evaluasi, yang menggunakan evaluasi formatif Tessmer (1998) meliputi expert review, one to one evaluation, small group evaluation, dan field test. Subjek penelitian ini yaitu kelas X IPA SMA Shailendra Palembang. Berdasarkan tahap expert rewiew tingkat kevalidan produk LKPD melalui aspek materi, aspek desain, dan aspek bahasa pembelajaran diperoleh nilai rata-rata sebesar 87,08% dengan katagori sangat valid. Tahap one to one memperoleh nilai rata-rata sebesar 81,31%  dengan katagori sangat praktis. Tahap small group memperoleh nilai rata-rata sebesar 90,6% dengan katagori sangat praktis dan berdasarkan nilai hasil pretest-postest peserta didik diperoleh nilai rata-rata N-gain sebesar 0,66 dengan katagori sedang. Maka dapat disimpulkan bahwa LKPD berbasis discovery learning berbantuan software tracker sangat valid, sangat praktis, serta memilki efek potensial bagi peserta didik yaitu dengan bukti meningkatnya pemahaman konsep Fisika peserta didik. Kata kunci: LKPD, Discovery Learning, Software Tracker, Pemahaman Konsep. ABSTRACT This study aims to develop discovery learning-based worksheets with the help of tracker software that are valid, practical, and have potential effects to improve students' conceptual understanding. This type of research is research and development using the Rowntree model development stage which includes the planning stage, development stage, and evaluation stage, which uses Tessmer's (1998) formative evaluation including expert review, one to one evaluation, small group evaluation, and field tests. The subject of this research is class X IPA SMA Shailendra Palembang. Based on the expert review stage, the level of LKPD product validity through material aspects, design aspects, and learning language aspects obtained an average value of 87.08% with a very valid category. The one to one stage obtained an average score of 81.31% in the very practical category. The small group stage obtained an average score of 90.6% in the very practical category and based on the students' pretest-posttest scores, an average N-gain value of 0.66 was obtained in the medium category. So it can be concluded that discovery learning-based worksheets with the help of tracker software are very valid, very practical, and have potential effects for students, namely with evidence of increasing students' understanding of physics concepts. Keywords: LKPD, Discovery Learning, Software Tracker, Concept Understanding.","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116009840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pengaruh Paparan Medan Magnet Extremely Low Frequency (ELF) terhadap Perubahan pH Pada Proses Fermentasi Biji Kopi Lanang (Peaberry) Kering","authors":"Mamik Purbawati, S. Sudarti, Firdha Kusuma A A","doi":"10.33369/jkf.4.2.129-136","DOIUrl":"https://doi.org/10.33369/jkf.4.2.129-136","url":null,"abstract":"ABSTRAK Kopi lanang (Peaberry) merupakan jenis kopi yang mempunyai biji berkeping satu (monokotil) dengan kafein yang kadarnya lebih tinggi jika dibandingkan dengan kopi jenis lain. Kadar kafein yang tinggi pada biji kopi bisa diturunkan dengan proses fermentasi kopi. Penelitian ini mempunyai tujuan untuk mengetahui pengaruh paparan medan magnet ELF (Extremely Low Frequency) terhadap perubahan pH pada proses fermentasi biji kopi lanang (Peaberry) kering jenis robusta dengan penambahan enzim -amilase. Jenis penelitian yang digunakan yaitu penelitian eksperimen dengan desain Rancangan Acak Lengkap (RAL) bertujuan mengkaji pengaruh perlakuan dengan pengulangan percobaan. Penelitian ini memiliki tujuh kelompok sampel meliputi kelompok kontrol dan kelompok eksperimen variasi intensitas paparan medan manet ELF sebesar 200 µT dan 300 µT dan variasi lama pemaparan 30 menit, 60 menit dan 90 menit. Pengukuran data hasil penelitian diambil setelah pemaparan yaitu pada hari ke-1 sampai hari ke-5 selama proses fermentasi berlangsung. Hasil penelitian menyatakan bahwa paparan medan magnet ELF berpengaruh terhadap perubahan pH pada proses fermentasi biji kopi lanang (Peaberry) kering jenis robusta yang ditunjukkan dengan variasi bentuk grafik. Pemaparan medan magnet ELF dengan intensitas 200 µT dan lama pemaparan 30 menit dapat menurunkan pH secara signifikan, sedangkan intensitas 200 µT dan lama waktu paparan 90 menit dapat menaikkan pH secara signifikan pada proses fermentasi biji kopi lanang (Peaberry) kering jenis robusta. Kata  kunci : Medan magnet ELF, Fermentasi, Kopi Lanang (Peaberry), pH ABSTRACT Peaberry coffee is a type of coffee that has a single bean (monocotyle) with a higher levels of caffeine if compared whith other types of coffee. High levels of caffeine in coffee beans can be reduced by the coffee fermentation process. The study aims to examine the effect of exposure to the ELF (Extremely Low Frequency) magnetic field on changes of pH in the fermentation process of robusta peaberry dray coffee beans with the addition of -amylase enzyme. The type of research that use in the experimental reseacrh with a randomized subject post test only control grup design, it aiming to examine the effect of treatment by repeating the experiment. This study include seven sample groups covering the control group and the experimental group variation in the intensity of ELF magnetic field with 200 µT and 300 µT and variation of a length 30, 60, 90 minutes. Meansurement of the data research taken after exposure that is on the day one to day five during the fermentation process. The result of the study suggest that exposure to ELF magnetic field has an effect on the pH fermentation prosess of dried peaberry coffee beans, which was shown variations of the shape of the graph. Exposure to the ELF magnetic field with an intensity of 200 µT and the length of 30 minutes can significantly decrease the pH, while the intensity of 200 µT and the length of 30 minutes can signi","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126277463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}