Jurnal Kumparan Fisika最新文献

{"title":"OPTIMASI NILAI h1/d PADA KEBERLAKUAN PERSAMAAN BERNOULLI","authors":"Hindaresmi Hindaresmi, M. Toifur","doi":"10.33369/jkf.5.1.63-68","DOIUrl":"https://doi.org/10.33369/jkf.5.1.63-68","url":null,"abstract":"ABSTRAK Telah dilakukan eksperimen hukum Bernoulli pada fenomena bejana berlubang dengan bantuan aplikasi tracker. Penelitian ini bertujuan untuk menentukan pengaruh diameter lubang kebocoran terhadap laju penurunan air (v1) dan menentukan pengaruh kecepatan penurunan cairan di permukaan bejana (v1) terhadap kecepatan cairan yang mengalir dari lubang kebocoran bejana (v2), menggunakan bantuan aplikasi tracker, ditinjau dari segi eksperimen. Penelitian ini dilakukan sebanyak lima  kali pada diameter lubang kebocoran yang berbeda-beda yaitu 0,5 cm, 1,0 cm, 1,5 cm, 2,0 cm, dan 2,5 cm, dengan diameter bejana 15 cm. Video yang dihasilkan dari rekaman kebocoran air kemudian ditrack menggunakan aplikasi tracker untuk mendapatkan nilai h1 persatuan waktu. Hasil yang diperoleh dari penelitian ini adalah ditemukannya hubugan antara laju penurunan air dan diameter lubang kebocoran, yaitu semakin besar diameter lubang kebocoran, semakin besar juga laju penurunan air yang terjadi pada permukaan bejana dan diperoleh hubungan antara kecepatan penurunan air (kecepatan efflux) dan kecepatan mengalirnya air pada lubang kebocoran yaitu semakin besar kecepatan efflux semakin besar pula laju kebocoran air pada sisi bejana. Kata kunci: Persamaan Bernoulli, aplikasi tracker, kecepatan efflux. ABSTRACT Bernoulli's law experiment has been carried out on the phenomenon of hollow vessels with the help of a tracker application. This study aims to determine the effect of the diameter of the leak hole on the rate of water reduction (v1) and determine the effect of the velocity of the liquid on the surface of the vessel (v1) on the velocity of the liquid flowing from the leak hole (v2), using the help of a tracker application, in terms of experiments . This research was conducted five times at different diameters of the leak holes, namely 0.5 cm, 1.0 cm, 1.5 cm, 2.0 cm, and 2.5 cm, with a vessel diameter of 15 cm. The video generated from the water leak recording is then tracked using the tracker application to get the h1 value per unit of time. The results obtained from this study were found a relationship between the rate of decrease in water and the diameter of the leak hole, namely the larger the diameter of the leak hole, the greater the rate of water reduction that occurred on the surface of the vessel and a relationship was obtained between the speed of water reduction (efflux speed) and the flow rate. water in the leak hole, namely the greater the efflux velocity, the greater the rate of water leakage on the side of the vessel. Keywords— Bernoulli equation, tracker app, efflux speed.","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123451563","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 STRATEGI PROBLEM BASED LEARNING DAN MOTIVASI BERPRESTASI TERHADAP KETERAMPILAN BERPIKIR KRITIS","authors":"S. Supriyanto, A. N. Fatirul, Djoko Adi Walujo","doi":"10.33369/jkf.5.1.43-54","DOIUrl":"https://doi.org/10.33369/jkf.5.1.43-54","url":null,"abstract":"ABSTRAK Tujuan penelitian ini yaitu: 1) untuk mengetahui hasil perbedaan kemampuan keterampilan berpikir kritis siswa antara diajar strategi problem based learning dengan inquiry. 2) mengetahui perbedaan antara motivasi berprestasi tinggi dan rendah terhadap keterampilan berpikir kritis siswa. 3) mengetahui perbedaan interaksi antara problem based learning dan motivasi berprestasi terhadap keterampilan berpikir kritis. Populasi penelitian ini 93 siswa kelas XI MIPA SMA Muhammadiyah 2 Surabaya. Sampel diambil secara acak. Sedangkan metode pengumpulan data dengan menggunakan instrument terdiri angket motivasi berprestasi dan tes hasil belajar untuk mengetahui keterampilan berpikir kritis siswa. Analisis data yang digunakan dengan teknik analisis varians dua jalur (ANAVA). Berdasarkan penyajian data dan pembahasan disimpulkan : 1) strategi pembelajaran problem based learning lebih baik dari pada inquiry terhadap keterampilan berfikir kritis siswa. 2) terdapat perbedaan yang signifikan antara motivasi berprestasi tinggi dan motivasi rendah terhadap keterampilan berpikir kritis siswa. 3) strategi pembelajaran dan motivasi berprestasi berpengaruh terhadap keterampilan berpikir kritis siswa. Kata  kunci: problem based learning, inquiry, motivasi berprestasi, berpikir kritis ABSTRACT The aims of this research are: 1) to find out the results of differences in students' critical thinking skills between those taught with problem based learning and inquiry strategies. 2) knowing the difference between high and low achievement motivation on students' critical thinking skills. 3) find out the difference in the interaction between problem based learning and achievement motivation on critical thinking skills. The population in this study were 93 students of class XI MIPA SMA Muhammadiyah 2 Surabaya. Samples were taken randomly. While the data collection method using an instrument consisting of achievement motivation questionnaires and learning outcomes tests to determine students' critical thinking skills. Data analysis used two-way analysis of variance (ANAVA) technique. Based on data presentation and discussion, it can be concluded: 1) problem based learning strategy is better than inquiry on students’ critical thinking skills. 2) there is a significant difference between high achievement motivation and low motivation on strudents’ critical thinking skills. 3) learning strategies and achievement motivation have an effect on students’ critical thinking skills. Keywords: problem based learning, inquiry, achievement motivation, critical thinking","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"35 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131726468","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":"GERAK SILINDER PADA BIDANG MIRING DALAM AIR DENGAN VARIASI KETINGGIAN AIR","authors":"Deidra Robertha Anggraeny Noel, Y. Pramudya, M. I. Sukarelawan, R. Ariefka","doi":"10.33369/jkf.5.1.37-42","DOIUrl":"https://doi.org/10.33369/jkf.5.1.37-42","url":null,"abstract":"ABSTRAK Silinder pejal yang menggelinding di atas bidang miring akan mengalami dua gerak sekaligus, yakni gerak rotasi dan translasi. Gerak rotasi terhadap sumbu silinder pejal dan gerak translasi terhadap bidang miring yang dilalui. Dinamika gerak rotasi dan translasi pada bidang miring menjadi kompleks saat silinder pejal bergerak 2 medium yang berbeda kerapatannya. Penelitian ini merupakan eksperimen di laboratorium untuk menentukan profil jarak terhadap waktu dan kecepatan terhadap waktu untuk gerak silinder pada bidang miring dalam air dengan variasi ketinggian air. Pengambilan data dilakukan menggunakan perekaman video dengan variasi ketinggian air pada saat silinder pejal menggelinding pada bidang miring, lalu video tersebut dipindahkan ke laptop untuk di-tracking menggunakan software tracker. Data yang diperoleh dari hasil tracking tersebut kemudian dibuat grafik profil jarak terhadap waktu dan profil kecepatan terhadap waktu. Pada hasil analisis data selain menghasilkan profil jarak terhadap waktu dan kecepatan terhadap waktu juga memperoleh pengaruh variasi ketinggian air pada profil jarak terhadap waktu dan kecepatan terhadap waktu. Semakin tinggi air, maka semakin pendek lintasan yang ditempuh oleh silinder. Perubahan kecepatan silinder cenderung tidak linear bila ketinggian air tidak tinggi karena gaya gesekan dengan lintasan mulai membesar. Silinder bergerak dengan kecepatan hampir konstan pada saat di dalam air. Kata  kunci— Silinder pejal, software tracker, bidang miring, air ABSTRACT A solid cylinder that rolls on an inclined plane will experience two motions at once, namely rotational and translational motion. Rotational motion about the axis of a solid cylinder and translational motion about the inclined plane traversed. Rotational and translational motion dynamics on inclined plane become complex as a solid cylinder move inside two different mediums that has different density. This research is an experimental research in the laboratory to determine the profile of distance and velocity versus time of cylinder on an inclined plane in water with variations in water level. Data retrieval is done using video recording with variations in water level when a solid cylinder rolls on an inclined plane, then the video is transferred to a laptop for tracking using tracker software. The data are plotted to obtain graph of distance and velocity profile In the results of data analysis, in addition to producing a profile of distance against time and speed with respect to time, it also obtained the effect of variations in water level on the profile of distance against time and speed with respect to time. Higher the water height, shorter the cylinder path. The changes of cylinder speed tend to be non-linear if the height of water is low. This is due to the drag force with the track start to increase. Cylinder move with the speed almost constant under water. Keywords— Solid cylinder, tracker software, inclined plane, water","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128644466","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":"IDENTIFIKASI PIGMEN KLOROFIL DAN CELAH ENERGI PADA DAUN CINCAU (CYCLEA BARBATA) SEBAGAI FOTOSENSITIZER ALAMI UNTUK APLIKASI DSSC","authors":"Ismail Saleh, Wa Ode Nirwana Sari Halidun","doi":"10.33369/jkf.5.1.31-36","DOIUrl":"https://doi.org/10.33369/jkf.5.1.31-36","url":null,"abstract":"ABSTRAK Klorofil merupakan pigmen berwarna hijau yang terdapat pada tumbuhan atau daun yang berwarna hijau. Pigmen klorofil berfungsi menyerap energi cahaya dan mengkonversi energi cahaya tersebut menjadi energi kimia. Selain itu, klorofil juga dapat mentransfer elektron, sehingga pigmen ini dapat digunakan sebagai fotosensitizer alami pada perangkat sel surya tersensitisasi dye (DSSC). Fotosensitizer alami memiliki beberapa kelebihan seperti harganya yang murah, jumlah berlimpah, ramah lingkungan, dan proses sintesis yang mudah. Tanaman cincau (Cyclea barbata) merupakan tanaman yang populer di Indonesia. Tanaman ini sering digunakan pada industri makanan, minuman, farmasi, dan lain sebagainya. Penelitian ini bertujuan untuk mengidentifikasi pigmen klorofil dan besar celah energi pada daun Cyclea barbata yang akan diaplikasikan pada sel surya tersensitisasi dye (DSSC). Prosedur kerja dalam penelitian ini yaitu: (1) ekstraksi pigmen klorofil, (2) pemurnian pigmen klorofil, (3) karakterisasi pigmen klorofil, dan (4) penentuan besar celah energi pigmen klorofil. Pigmen klorofil daun Cyclea barbata diekstraksi menggunakan larutan etanol dengan perbandingan 1:5 (volum/volum). Proses pemurnian pigmen dilakukan dengan teknik evaporasi pada suhu 30°- 40°C. Karakterisasi UV-Vis digunakan untuk mengetahui rentang penyerapan pigmen klorofil dan celah energi yang terdapat pada daun Cyclea barbata. Hasil penelitian menujukkan rentang penyerapan pigmen daun Cyclea barbata terletak pada rentang panjang gelombang 402 nm dan 660 nm. Celah energi pigmen daun Cyclea barbata diperoleh sebesar 1,804 eV.Kata  kunci—klorofil, celah energi, fotosensitizer alami, DSSC. ABSTRACT Chlorophyll is a green pigment found in green-coloured plants or leaves. Chlorophyll pigment absorbs energy from light and convert it into chemical energy. Moreover, it can transfer electrons, so it can be used as a natural photosensitizer on dye-sensitized solar cell (DSSC) device. Natural photosensitizer has several advantages, such as its lower cost, abundant quantities, eco-friendly, and easy to synthesize. Grass jelly (Cyclea barbata) is a popular plant in Indonesia. The plant is often used in the food, beverage, and pharmaceutical industry. This research aimed to identify the chlorophyll pigment and gap energy from Cyclea barbata leaf which will be applied to dye-sensitized solar cell (DSSC). The procedures in this research were: (1) extracted the chlorophyll pigment, (2) purified the chlorophyll pigment, (3) characterized the chlorophyll pigment, and (4) determined the gap energy of the chlorophyll pigment. Chlorophyll pigment of Cyclea barbata leaf was extracted using ethanol solution with ratio 1:5 (v/v). Pigment purification process was held using evaporation technique at temperature of 30°-40°C. UV-Vis characterization was carried out to determine the range of chlorophyll pigment absorbance and gap energy of Cyclea barbata leaf. The result showed that the range of chlorophyll pigment ab","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131103996","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":"DESAIN DAN PERANCANGAN INSTRUMEN MONITORING KEKERUHAN AIR DENGAN SISTEM REAL TIME CLOCK (RTC)","authors":"Refpo Rahman, Fades Br. Gultom","doi":"10.33369/jkf.5.1.23-30","DOIUrl":"https://doi.org/10.33369/jkf.5.1.23-30","url":null,"abstract":"ABSTRAK Instrumen monitoring tingkat kekeruhan air dapat dirancang dengan Arduino Uno. Modul turbidity sensor dan modul RTC DS3231 digunakan untuk mengukur tingkat kekeruhan air secara real time yang hasil pengukuran tersimpan otomatis di dalam SD card. Instrumen tingkat kekeruhan air ini dapat digunakan dalam pengukuran tingkat kekeruhan air tanpa harus tersambung dengan sumber listrik PLN karena menggunakan baterai dengan kapasitas yang besar yaitu 2200 mAh. Berdasarkan desain yang telah dirancang, terdapat beberapa port pada instrumen seperti connector arduino ke PC, adabtor DC 12 V dan slot SD card. Terdapat dua langkah pengujian diterapkan antara lain pengujian alat untuk dikalibrasi dan pengujian tingkat kesalahan relatifnya. Berdasarkan hasil pengujian pertama diperoleh persamaan fungsi  y = -104,17 x2 + 431,83x + 2 yang digunakan untuk kalibrasi alat sesuai dengan alat standar turbiditimeter 2100. Selanjutnya, melakukan perhitungan kesalahan relatif alat instrumen. Hasilnya, instrumen monitoring kekeruhan air ini dapat mengukur tingkat kekeruhan air pada rentang 50-500 NTU dengan tingkat kesalahan sebesar 1.67%. Kata  kunci : Arduino Uno, DS3231, turbidity sensor, real time clock ABSTRACT The instrument for monitoring the level of water turbidity can be designed with the Arduino Uno. The turbidity sensor module and DS3231 RTC module are used to measure the turbidity level of the water in real time. The measurement results are stored automatically in the SD card. This water turbidity level instrument can be used in the field without having to be connected to a PLN electricity source because it uses a battery with a large capacity of 2200 mAh. Based on the design that has been designed, there are several ports on the instrument such as an Arduino to PC connector, adapter of 12 V DC and SD card slot. There are two testing steps applied, including testing to be calibrated and testing its relative error rate. Based on the results of the first test, the equation of the function y = -104.17 x2 + 431.83x + 2 is obtained which is used for calibration of the instrument according to the standard tool of turbiditimeter 2100. The second, calculate the relative error of the instrument. As a result, this water turbidity monitoring instrument can measure the level of water turbidity in the range of 50-500 NTU with an error rate of 1.67%. Keywords—Arduino Uno, turbidity sensor, real time clock, modul RTC DS3231","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123509496","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 KEMAMPUAN PENGUASAAN KONSEP IPA TERPADU DAN KEPEDULIAN LINGKUNGAN MAHASISWA MELALUI PENGGUNAAN BAHAN AJAR PENGOLAHAN TEBU SEBAGAI ENERGI TERBARUKAN","authors":"L. Nuraini, S. Supeno, S. Sudarti, S. Astutik, Shinta Nuriyah Mahbubiyah Royani","doi":"10.33369/jkf.5.1.15-22","DOIUrl":"https://doi.org/10.33369/jkf.5.1.15-22","url":null,"abstract":"ABSTRAK Jember merupakan daerah yang memiliki potensi tebu yang besar. Akan tetapi, potensi pengolahan tebu belum banyak dikembangkan sebagai sumber belajar dalam proses pembelajaran sehingga belum dapat menumbuhkan kesadaran akan kepedulian lingkungan akibat keberadaan limbah dari pabrik pengolahan tebu. Tujuan dari penelitian ini adalah untuk mendeskripsikan tentang penguasaan konsep ipa terpadu dan tingkat kepedulian lingkungan mahasiswa setelah pembelajaran menggunakan bahan ajar tentang pengolahan tebu sebagai energi terbarukan. Metode penelitian yang digunakan adalah penelitian eksperimen dengan desain penelitian one group pretest posttest design. Sampel penelitian ini adalah mahasiswa calon guru fisika yang menempuh mata kuliah IPA Terpadu. Teknik pengumpulan data secara observasi, dokumentasi dan test penguasaan konsep. Hasil penelitian menunjukkan bahwa kemampuan penguasaan konsep IPA Terpadu mahasiswa mengalami peningkatan sebesar 0,43 dan berada dalam kategori sedang. Mahasiswa menunjukkan adanya peningkatan sikap kepedulian lingkungan terhadap potensi lokal pengolahan tebu sebagai energi terbarukan yang ada di Jember. Kemampuan penguasaan konsep dan sikap kepedulian lingkungan sangat penting dimiliki oleh mahasiswa agar mahasiswa mampu mengintegrasikan konsep yang dimiliki ke dalam sikap peduli lingkungan dalam kehidupan nyata.Kata Kunci: IPA Terpadu, Penguasaan Konsep, Kesadaran Lingkungan, Tanaman TebuABSTRACT Jember is a regency which has a great potential of sugar cane. Meanwhile, the potential of the processing of sugar cane was not yet to be developed as a learning resource and hence was not able to grow the environment awareness which was caused by the waste of sugar cane factory. The aimed of this research was to describe the mastery concept learning of integrated science and level of students’ environment awareness after learning by using teaching material about the processing of sugar cane as a renewable energy. The method was experimental research with one group pretest-posttest design. The sample of this research was physics students who took integrated science course.  The research data which was collected by using observation, documentation, and mastery concept test was analyzed by using normalized gain. The result showed that there was an increasing of N-gain around 0,43 and came to medium category. It also showed that there was environment awareness toward local potential of sugar cane manufacturing as a renewable energy in Jember. The ability of mastery concept and environment awareness was very important to be had by students, so the students were able to integrate the science concept into environment awareness behaviour in the daily life.Keywords: Integrated Science; Mastery Concept Learning; Environment Awareness; Sugar Cane.","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"264 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125810600","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 KEBUTUHAN PENGEMBANGAN BAHAN AJAR DIGITAL MATAKULIAH GEOFISIKA BERBASIS PLATFORM LMS MOODLE UNTUK MENUNJANG IMPLEMENTASI KURIKULUM MBKM","authors":"A. Purwanto, E. Risdianto","doi":"10.33369/jkf.5.1.7-14","DOIUrl":"https://doi.org/10.33369/jkf.5.1.7-14","url":null,"abstract":"ABSTRAK Penelitian ini bertujuan untuk mengetahui kebutuhan mahasiswa Pendidikan Fisika Universitas Bengkulu terhadap bahan ajar digital mata kuliah geofisika untuk menunjang implementasi kurikulum MBKM. Penelitian dilakukan di Program Studi Pendidikan Fisika Universitas Bengkulu pada bulan November 2021. Sampel penelitiannya adalah 47 mahasiswa. Teknik pengumpulan data yang digunakan dalam penelitian analisis kebutuhan ini adalah teknik survey. Instrumen penelitian yang digunakan adalah lembar angket kebutuhan mahasiswa Pendidikan Fisika Universitas Bengkulu terhadap bahan ajar digital matakuliah geofisika. Teknik analisis data yang digunakan adalah analisis statistik deskriptif. Berdasarkan hasil uji validitas dan reliabilitas dinyatakan bahwa angket kebutuhan yang digunakan untuk mengumpulkan data memiliki item-item yang valid dan reliabel. Hasil analisis data menyatakan bahwa mahasiswa sangat setuju dilakukannya pengembangan bahan ajar digital matakuliah geofisika berbasis platform LMS moodle untuk menunjang implementasi kurikulum MBKM. Kata  kunci: bahan ajar digital, geofisika, mbkm ABSTRACT This study aims to determine the needs of Physics Education students at Bengkulu University for digital teaching materials for geophysics courses to support the implementation of the MBKM curriculum. The research was conducted at the Physics Education Study Program at Bengkulu University in November 2021. The research sample was 47 students. The data collection technique used in this needs analysis research is a survey technique. The research instrument used was a questionnaire on the needs of Bengkulu University Physics Education students for digital teaching materials for geophysics courses. The data analysis technique used is descriptive statistical analysis. Based on the results of the validity and reliability test, it is stated that the needs questionnaire used to collect data has valid and reliable items. The results of data analysis state that students strongly agree with the development of digital teaching materials for geophysics courses based on the Moodle LMS platform to support the implementation of the MBKM curriculum. Keywords: digital teaching materials, geophysics, mbkm","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126969252","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 TEMPAT SAMPAH PINTAR MENGGUNAKAN SENSOR ULTRASONIK BERBASIS ARDUINO UNO UNTUK LIMBAH MASKER","authors":"Sri Purwaningsih, Jesi Pebralia, Rustan Rustan","doi":"10.33369/jkf.5.1.1-6","DOIUrl":"https://doi.org/10.33369/jkf.5.1.1-6","url":null,"abstract":"ABSTRAK Penggunaan masker telah menjadi kewajiban dan gaya hidup baru bagi masyarakat menyebabkan peningkatan limbah masker. Tempat sampah masker didominasi oleh tempat sampah konvensional yakni  pengguna harus membuka dan menutup penutup tempat sampah tersebut dengan menggunakan tangan atau pijakan kaki dan dapat menjadi ancaman sumber penularan baru COVID-19. Pada penelitian ini dikembangkan tempat sampah pintar untuk limbah masker menggunakan sensor dan motor servo berbasis Arduini Uno. Sensor yang digunakan adalah sensor ultrasonik HC-SR04 sebagai pendeteksi jarak dan pengukur volume sampah limbah masker medis. Motor servo befungsi membuka dan menutup tempat sampah dan dikontrol oleh Arduino Uno secara otomatis. Hasil kalibrasi sensot ultasonik HC-SR04 yang telah dilakukan menghasilkan persaman linier dan nilai R2= 0.9986. Hal ini menunjukkan sensor ultrasonik HC-SR04 dapat diaplikasikan dalam pengembangan tempat sampah pintar. Kata kunci: Arduino Uno, Motor Servo, Sensor Ultrasonik, Tempat Sampah Pintar ABSTRACT The use of masks has become a requirement and a new lifestyle for the community has led to an increase in mask waste. The trash bin for masks waste are dominated by conventional trash bin, where users have to open and close the lid of the trash bin by using hands or footrests and this can pose a threat to a new source of COVID-19 transmission. In this study, a smart trash bin for mask waste was developed using an Arduino Uno-based sensor and servo motor. The sensor used is the ultrasonic sensor HC-SR04 as a distance sensor and measuring the volume of medical mask waste. The servo motor used to open and close the trash bin and is controlled by Arduino Uno automatically. The results of the ultrasonic sensor HC-SR04 calibration that have been carried out produce a linear equation and the value of R2 = 0.9986. This shows that the ultrasonic sensor HC-SR04 can be applied in the development of smart trash bins. Keywords: Ardunino Uno, Servo Motor, Ultrasonic Sensor, Smart Trash","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"231 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114991705","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 NILAI MOMEN MAGNET NEODYMIUM YANG BERGERAK DI DALAM PIPA ALUMINIUM DAN KUNINGAN DENGAN METODE ANALISIS VIDEO","authors":"Albertus Hariwangsa Panuluh, Yohanes Jeverson Bulu","doi":"10.33369/jkf.4.3.229-236","DOIUrl":"https://doi.org/10.33369/jkf.4.3.229-236","url":null,"abstract":"Telah dilakukan penelitian untuk menentukan nilai momen magnet dan mengetahui hubungan diameter dalam pipa terhadap nilai momen magnet neodymium yang bergerak di dalam pipa aluminium dan kuningan dengan metode analisis video. Dipakai sistem pesawat atwood untuk merancang  prosedur percobaan pengambilan data. Salah satu beban yang digantungkan di ujung  tali direkam pergerakannya menggunakan kamera panasonic Hc-V30. Kemudian file video tersebut dianalisis menggunakan software Logger Pro. Dari analisis tersebut diperoleh grafik posisi fungsi waktu. Kemudian dipilih data yang menunjukkan bahwa magnet telah bergerak dengan kecepatan konstan. Nilai kemiringan dari grafik sama dengan nilai kecepatan terminal dari gerak magnet di dalam pipa. Nilai kecepatan terminal tersebut dapat digunakan untuk memperoleh nilai koefisien redaman magnetik. Kemudian nilai koefisien redaman magnetik yang diperoleh digunakan untuk memperoleh nilai momen magnetik. Dari penelitian yang telah dilakukan dapat disimpulkan bahwa nilai koefisien redaman magnetik berbanding terbalik dengan diameter dalam pipa dan berbanding lurus dengan suseptibilitas bahan. Nilai momen magnet berbanding lurus dengan diameter dalam pipa dan berbanding terbalik dengan koefisien konduktivitas bahan.","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":" 790","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120829218","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":"TEKNIK ASTOPHOTOGRAFI DALAM PENENTUAN POLA AKHIR SENJA (HILANGNYA MEGA MERAH) SEBAGAI AWAL MASUKNYA WAKTU ISYA DENGAN IMAGE PROCESSING","authors":"Arif Septianto","doi":"10.33369/jkf.4.3.221-228","DOIUrl":"https://doi.org/10.33369/jkf.4.3.221-228","url":null,"abstract":"Penggunaan  drone dalam teknik astofotografi menjadi solusi atas permasalahan pengukuran kecerlangan langit  untuk mengetahui hilangnya waktu  syafaq mengunakan SQM yang dinilai kurang efisien. Pada kasus menentukan awal waktu isya ditandai dengan hilangnya mega merah (syafaq) pada langit sebelah barat saat malam hari. Dalam peneitian pengukuran citra langit peneliti menggunakan teknologi drone sebagai sensor image. Data foto yang diambil pada penelitian ini diambil dalam rentang 15 sekon/ capture. Data yang didapat tidak dapat langsung di gunakan karna masih terdpat noise. Karnanya perlu dihilangkan terlebih dahulu dengan metode image processing agar data tersebut dapat terlihat jelas dan mudah direpresentasikan oleh mata manusia atau komputer yang sifatnya deterministik. Metode pengolahan data pada penelitian ini menggunakan Microsoft excel dan MATLAB dengan persamaan polynomial 5 untuk memplot grafik kecerahan langit. Hasil pada penelitian ini menunjukan bahwa waktu hilangnya syafaq berbeda- beda pada setiap harinya. Waktu paling awal hilangnya syafaq terjadi pada pukul 18:38:18 dan waktu paling akhir terjadi pada pukul 18:59:19","PeriodicalId":308945,"journal":{"name":"Jurnal Kumparan Fisika","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122867241","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}