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All Journal Komunikasi Fisika Indonesia Bulletin of Electrical Engineering and Informatics JFA (Jurnal Fisika dan Aplikasinya) Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Jurnal Fisika FLUX Journal of Teaching and Learning Physics AL ISHLAH Jurnal Pendidikan JIPF (Jurnal Ilmu Pendidikan Fisika) Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Pendidikan Fisika ORBITA: Jurnal Pendidikan dan Ilmu Fisika KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA J-MPI (Jurnal Manajemen Pendidikan Islam) Jurnal Pendidikan Fisika dan Teknologi Jurnal Ilmiah Mandala Education (JIME) Indonesian Physical Review Jurnal Isema : Islamic Educational Management JURNAL PENDIDIKAN MIPA Jurnal Ilmiah Profesi Pendidikan Indonesian Journal of Electrical Engineering and Computer Science Relativitas : Jurnal Riset Inovasi Pembelajaran Fisika Jurnal Ilmu dan Inovasi Fisika Jurnal Pendidikan Progresif
Bahtiar, Bahtiar
Universitas Islam Negeri Mataram
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Analisis Periodisitas Gempa Bumi Diwilayah Kabupaten Lombok Barat Dengan Menggunakan Metode Statistik Dan Transformasi Wavelet Fatimatuzzahra, Fatimatuzzahra; Didik, Lalu A.; Bahtiar, Bahtiar
Jurnal Fisika dan Aplikasinya Vol 16, No 1 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i1.5717

Abstract

Abstrak Penelitian ini adalah penelitian eksperimen. Dimana bertujuan untuk mengetahui yang pertama variasi nilai –a (aktivitas seismik) dan nilai –b (tingkat kerapuhan batuan), kedua mengetahui peridesitas gempa bumi dengan metode statistik dan transformasi wavelet, dan yang ketiga menganalisis hasil dari metode statistik dan transformasi wavelet diwilayah kabupaten Lombok Barat. Metode yang digunakan untuk menentukan periodesitas gempa bumi dalam penelitian adalah metode statistik dan transformasi wavelet. Metode statistik dengan prangkat lunak Zmap digunakan untuk menentukan nilai –, nilai –b, dan periodesitas gempa bumi. Pada metode transformasi wavelet digunakan skewness, transformasi Box Cox,  dan transformasi wavelet continyu untuk menghitung periodesitas gempa. Penelitian ini menggunakan data dari BMKG dan National Earthquake Interntional Center (NEIC) untuk daerah antara episenter 1150.46-1160.20BT, dan 80.25 sampai dengan 80.55LS dari tanggal 22 Januari 2014 sampai 30 Oktober 2018. Analisis statistik menghasilkan parameter yang berkaitan dengan kondisi seismik (kegempaan) dan tektonik daerah penelitian. Parameter tersebut terdiri atas nilai – sekitar 5,5-2, nilai –b 0,9-1,8. Kedua parameter tersebut menunjukkan jarangnya terjadi gempa bumi dan cukup tingginya stress pada lempeng. Periodesitas berdasarkan hasil analisis statistik adalah sekitar 40-60 tahunan untuk magnitude 5,5 SR. Dengan metode transformasi wavelet diperoleh periodesitas sebesar 30 tahun dan 60 tahun untuk gempa dengan magnitudo 5,5 SR. Sehingga bisa disimpulkan bahwa hasil ini menunjukkan bahwa kedua metode tersebut menghasilkan nilai periodesitas yang hampir sama. Abstract This research is experimental research. Where the aim is to find out the first variotion of the a- vuale and the –b vuale, the second is to know the earthquake frequency whit the statistical method and wavelet transformation. And the third to analyze the results of the statistical method and wavelet transformation in the west Lombok regency. The method used to determine the earthquake periodicity in the study is the statistical method and the wavelet transformation. Statistical methods with Zmap sofwer are used to determine –a values, -b vuales, and earthquake periodicity. The wavelet transformation method uses skeweness, Box Cox transformation, and continyu wavelet transformation to calculate earthquake periodicity. This study uses data from BMKG and the National Earthquake International Center (NIEC) for the area between the epicenter of 1150.46-1160.20 BT, and 80.25 to 80.55 LS from 22 January 2014 to 30 October 2018. Statistical analysis produces parameters related to saismic conditions (seismic) and tectonic research area. The parameter consists of a vuale –a around 5,5 – 2 the –b vuale of 0,9 – 1,8. Both of these parameters shwo a rare earthquake and quite high stress on the plate. Periodicity based on the results of statistical analysis is around 40-60 years for magnitude 5,5 SR. with the wavelet transformation method, the periodecity of 30 years and 60 years is obtained for earthquakes with magnitude 5,5 SR. these results indicate that the two methods produce almost the same periodecity values. 
ANALISIS KUALITAS MINYAK GORENG BERDASARKAN SUHU PEMANASAN DENGAN METODE KOEFISIEN VISKOSITAS FALLING BALL Khaeratin Shoaliha; Kurniawan Arizona; Bahtiar Bahtiar
Indonesian Physical Review Vol. 3 No. 1 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (792.71 KB) | DOI: 10.29303/ipr.v3i1.38

Abstract

This study aims to determine the effect of temperature on oil viscosity or viscosity using the falling ball method. The approach in this study uses a quantitative approach to the type of laboratory experimental research. The population of this research is cooking oil, by taking three types of oil samples. The three types consisted of palm oil, coconut, and olive which were then observed for their effects on temperature using the fall ball method. Data were collected through laboratory experiments with measurements three times using the falling ball viscosity method. The data analysis technique used is regression analysis. Based on tests that have been done, it can be observed that palm oil before it is heated has a viscosity value of 0.885 Ns / m2, when palm oil is heated to temperatures of 40˚C, 60˚C, 80˚C, and 100˚C the viscosity value changes to 0.854 Ns / m2, 0.754 Ns / m2, 0.828 Ns / m2 and 0.616 Ns / m2. Coconut oil before heating has a viscosity value of 0.828 Ns / m2, when heated with the same temperature the viscosity value changes to 0.666 Ns / m2, 0.588 Ns / m2, 0.572 Ns / m2, and 0.524 Ns / m2. Olive oil before heating has a value of 0.919 Ns / m2, when it is heated the value decreases to 0.869 Ns / m2, 0.774 Ns / m2, 0.746 Ns / m2, and 0.680 Ns / m2. Correlation value obtained based on data calculations is -0.616 meaning that temperature and viscosity have a strong relationship, a negative sign indicates that the relationship is inversely proportional. It can be seen that there is an effect of viscosity value on cooking oil temperature. 
PENGARUH PENERAPAN PENDEKTAN SAINTIFIK BERBASIS EKSPERIMEN TERHADAP KEMAMPUAN BERPIKIR KRITIS Nur Latifah; Bahtiar Bahtiar; Muhammad Kafrawi
JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar Vol 7 No 2 (2019): September
Publisher : Pendidikan Fisika UIN Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (907.555 KB) | DOI: 10.24252/jpf.v7i2.10086

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh penerapan pendekatan saintifik berbasis eksperimen terhadap kemampuan berpikir kritis pada pembelajaran fisika siswa kelas X SMA Negeri 8 Mataram Tahun Pelajaran 2018/2019. Penelitian ini merupakan penelitian kuantitatif eksperimen. Jenis penelitian yang digunakan adalah pendekatan saintifik. Berdasarkan hasil analisis data dalam penelitian ini dengan menggunakan uji-t diperoleh ttabel 2,048 dan thitung=3,065, maka diketahui nilai thitung (2, 048)  ttabel (3,065) dengan dk yang besarnya dk = n1 + n2 : 2 dengan taraf signifikansinya 5%. Karena thitung lebih besar dari ttabel pada taraf sisgnifikan 5% maka H0 ditolak dan Ha diterima. Hasil penelitian ini, menunjukkan bahwa model pembelajaran pendekatan saintifik berpengaruh terhadap kemampuan berpikir kritis pesera didik di kelas X SMA Negeri 8 Mataram tahun 2018/2019.
Indoor and outdoor investigation comparison of photovoltaic thermal air collector Bahtiar Bahtiar; Muhammad Zohri; Ahmad Fudholi
Bulletin of Electrical Engineering and Informatics Vol 9, No 4: August 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (519.037 KB) | DOI: 10.11591/eei.v9i4.2108

Abstract

Photovoltaic technology is one of renewable energy technology very hopeful, especially photovoltaic thermal system or PVT system. A PVT system solar air collector produces hot air and electricity simultaneously. In this study, indoor and outdoor investigation comparison of PVT system solar air collector has tested at the National University of Malaysia. The indoor and outdoor investigation conducted with variation mass flow rates from 0.01 kg/s to 0.05 kg/s at the solar intensity of 820 W/m2. Indoor and outdoor evaluation is conducted to precisely evaluate the performance improvement theorized by the researcher. The comparison between the indoor and outdoor outcome purposed to confirm each testing and attraction decision. The outdoor investigation outcomes were agreement with indoor results. Indoor investigation outcomes reliably with outdoor investigation outcomes indicated by accuracy results.
Determine of the nira water viscosity by using video based laboratory falling ball method with tracker software Rianita Bela Islami; Lalu A. Didik; Bahtiar Bahtiar
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 2 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i2.10165

Abstract

This study aims to determine the viscosity of nira water using a falling ball method based on a video based laboratory with tracker software. This type of research is experimental research with a quantitative approach. The viscosity of nira water is measured by varying the temperature, concentration and duration of fermentation. The temperature varied, namely 160C, 270C and 820C. The concentrations were varied by comparing the viscosity coefficient value of pure nira water, nira water added with coconut water and mineral water. And for the fermentation time of the nira water was varied for 7 days, 9 days and 11 days of fermentation. The nira water with varying temperature, concentration and fermentation time has different coefficient values for the nira water. The nira water given the highest temperature has the lowest viscosity coefficient value. And the nira water with the highest concentration has the highest viscosity coefficient value as well. And the longest fermented juice showed the lowest value of the viscosity coefficient of nira water. And from the results of my interviews with nira water farmers in the village regarding the good viscosity coefficient value of nira water, it can be taken from the value of viscosity coefficient of pure nira water, as researchers also examined in this research. Because researchers saw to harvest nira water directly from the tree for research on pure nira water. 
Determine of the nira water viscosity by using video based laboratory falling ball method with tracker software Rianita Bela Islami; Lalu A. Didik; Bahtiar Bahtiar
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Article in Press
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v0i-.11991

Abstract

This study aims to determine the viscosity of sap water using a falling ball method based on a video based laboratory with tracker software. This type of research is experimental research with a quantitative approach. The viscosity of sap water is measured by varying the temperature, concentration and duration of fermentation. The temperature varied, namely 16 C, 27 C and 82 C. The concentrations were varied by comparing the viscoefficient value of pure sap water, sap water added with coconut water and mineral water. And for the fermentation time of the sap water was varied for 7 days, 9 days and 11 days of fermentation. The sap water with varying temperature, concentration and fermentation time has different coefficient values for the sap water. The sap water given the highest temperature has the lowest viscosity coefficient value. And the sap water with the highest concentration has the highest viscosity coefficient value as well. And the longest fermented juice showed the lowest value of the viscosity coefficient of sap water.
PENERAPAN PEMBELAJARAN BERBASIS MASALAH UNTUK MENINGKATKAN PENGUASAAN KONSEP DAN KETERAMPILAN BERPIKIR KREATIF Raehan Raehan; Kurniawan Arizona; Bahtiar Bahtiar
Journal of Teaching and Learning Physics Vol 5, No 1 (2020): Journal of Teaching and Learning Physics (February 2020)
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jotalp.v5i1.5755

Abstract

Penelitian ini bertujuan mengetahui peningkatan terhadap penguasaan konsep dan keterampilan berpikir kreatif peserta didik setelah diterapkannya model pembelajaran berbasis masalah. Sampel dalam penelitian adalah peserta didik kelas VIII MTs Ad-Diinul Qayyim dengan menggunakan pendekatan kualitatif dan jenis penelitian tindakan kelas. Adapun materi yang digunakan adalah Tekanan Zat. Penelitian ini dilaksanakan pada semester kedua tahun pelajaran 2018/2019. Instrumen yang digunakan meliputi 1) lembar observasi keterlaksanaan pembelajaran oleh guru; 2) lembar observasi aktivitas peserta didik; 3) instrumen tes penguasaan konsep dan instrumen tes keterampilan berpikir kreatif berupa soal essay. Hasil penelitian menunjukkan bahwa pembelajaran berbasis masalah dapat meningkatkan peguasaan konsep dan keterampilan berpikir kreatif, dengan diproleh skor sebagai berikut: Untuk penguasaan konsep pada siklus I diperoleh 65.52% dan siklus II 89.65%. Sedangkan keterampilan berpikir kreatif  dengan menggunakan tes berupa soal essay diperoleh 37.93% dan siklus II 93%.
Analisis PGA (Peak Ground Acceleration) Pulau Lombok Menggunakan Metode Pendekatan Empiris Baiq Nora Kusumawardani; Lalu A. Didik; Bahtiar Bahtiar
Jurnal Fisika dan Aplikasinya Vol 16, No 3 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i3.6372

Abstract

Pulau Lombok berada di antara dua lempeng besar yaitu lempeng Asia dan lempeng Australia sehingga Pulau Lombok sangat rawan akan terjadi guncangan gempa bumi dan pergeseran tanah. Faktor yang mempengaruhi niai percepatan tanah maksimum yaitu kondisi geologi dan karakteristik wilayah tersebut. Penelitian ini bertujuan untuk menganalisis nilai percepatan tanah maksimum menggunakan rumus empiris Donovan, Mc. Guirre, dan M. V. Mickey di Pulau Lombok.Data yang digunakan yaitu data sekunder gempa bumi Lombok dari Juli – September 2018 dan dianalisis menggunaakan rumusan Donovan, Guirre, dan Mickey. Hasil analisis menunjukkan bahwa nilai percepatan tanah maksimum paling tinggi sebesar 0.11191 gal yang terjadi didaerah Lombok Utara, dan daerah Lombok Utara termasuk kategori mengalami kerusakan berat. Nilai percepatan tanah masimum terkecil terjadi didearah Lombok Tengah dengan besar 0.03441 gal dan termasuk kategori sangat ringan. Dari ketiga rumusan, yang mendekati nilai percepatan tanah maksimum berdasarkan peta Shakemap yaitu rumusan Guirre.
STUDI KUALITAS SUSU KUDA LIAR SUMBAWA BERDASARKAN KOEFISIEN VISKOSITAS DAN DIELEKTRISITAS Nurul Savira; Bahtiar Bahtiar
ORBITA: Jurnal Kajian, Inovasi dan Aplikasi Pendidikan Fisika Vol 8, No 1 (2022): Mei
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (257.192 KB) | DOI: 10.31764/orbita.v8i1.8401

Abstract

ABSTRAKPenelitian ini bertujuan untuk menentukan kualitas susu kuda liar Sumbawa dengan metode viskositas dan dielektrisitas.  Sampel yang digunakan ialah susu kuda liar Sumbawa dengan variasi konsentrasi yakni dari 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, dan 100%. Variasi konsentrasi susu kuda liar yakni dicampurkan dengan soda. Berdasarkan hasil pengukuran koefisien viskositas diperoleh nilai koefisien pada konsentrasi 100% menunjukkan nilai koefisien viskositas 1,299 Poise dan memerlukan waktu 1,52 sekon. Pada variasi konsentrasi terkecil, yakni 10% dengan komposisi campuran 45 ml susu kuda liar dan 5 ml zat pelarut memiliki nilai koefisien viskositas sebesar 0,910 Poise dengan waktu 1,12 sekon. Selanjutnya pada pengukuran dielektrisitas diperoleh nilai konstanta dielektrik untuk konsentrasi 100% sebesar 2,63 x 106. Selanjutnya pada variasi konsentrasi 10% diperoleh nilai konstanta dielektrik sebesar 1,68 x 107. Hasil penelitian menunjukkan bahwa semakin tinggi konsentrasi larutan, maka semakin tinggi pula koefisien viskositas larutan. Hal tersebut dikarenakan massa jenis larutan berbanding lurus denga koefisien viskositas larutan. Namun, pada dielektrisitas larutan, semakin tinggi konsentrasi larutan, maka semakin rendah nilai konstanta dielektrik larutan. Hal tersebut dikarenakan massa jenis larutan berbanding terbalik dengan konstanta dielektrik larutan, sehingga makin tinggi konsentrasi larutan, maka semakin tinggi pula massa jenis larutan sehingga konstanta dielektrik larutan semakin rendah. Kata Kunci: konstanta dielektrik; susu kuda liar sumbawa; viskositas ABSTRACTThis study aims to determine the quality of Sumbawa wild horse milk with viscosity and dielectricity methods. The sample used was Sumbawa wild horse milk with concentration variations from 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%. Variations in the concentration of wild horse milk are mixed with soda. Based on the results of the measurement of the viscosity coefficient, the coefficient value at a concentration of 100% shows the viscosity coefficient value of 1.299 Poise and takes 1.52 seconds. At the smallest concentration variation, which is 10% with a mixture composition of 45 ml of wild horse milk and 5 ml of solvent, it has a viscosity coefficient value of 0.910 Poise with a time of 1.12 seconds. Furthermore, at the dielectricity measurement, the dielectric constant value for 100% concentration was 2.63 x 106. Furthermore, at the 10% concentration variation, the dielectric constant value was 1.68 x 107. The results showed that the higher the concentration of the solution, the higher the coefficient. solution viscosity. This is because the density of the solution is directly proportional to the viscosity coefficient of the solution. However, on the dielectricity of the solution, the higher the concentration of the solution, the lower the value of the dielectric constant of the solution. This is because the density of the solution is inversely proportional to the dielectric constant of the solution, so the higher the concentration of the solution, the higher the density of the solution so that the dielectric constant of the solution is lower. Keywords: dielectric constant; sumbawa wild horse milk; viscosity
PENGARUH MODEL PEMBELAJARAN KOOPERATIF TIPE STAD MENGGUNAKAN MEDIA FILM ANIMASI TERHADAP MOTIVASI DAN HASIL BELAJAR SISWA DI MTs. AL-INTISHOR SEKARBELA Bahtiar Bahtiar; Muhammad Kafrawi; Sri Yeni
ORBITA: Jurnal Kajian, Inovasi dan Aplikasi Pendidikan Fisika Vol 6, No 2 (2020): November
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (196.594 KB) | DOI: 10.31764/orbita.v6i2.2876

Abstract

ABSTRAKPenelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran kooperatif tipe STAD menggunakan media film animasi terhadap motivasi dan hasil belajar siswa di MTs. Al-Intishor Sekarbela. Jenis penelitian ini adalah penelitian quasi eksperiment dengan desain penelitian nonequivalent control group design. Populasi penelitian ini adalah seluruh siswa MTs. Al-Intishor Sekarbela dengan sampel penelitian siswa kelas VII-A sebagai kelas eksperimen dan kelas VII-B sebagai kelas kontrol. Penentuan sampel dilakukan dengan teknik cluster sampling. Teknik pengumpulan data adalah menggunakan angket untuk memperoleh motivasi belajar dan tes subjektif untuk memperoleh hasil belajar. Berdasarkan hasil analisis data motivasi sesudah perlakuan diperoleh nilai rata-rata kelas eksperimen sebesar 2.86 dan kelas kontrol 2.29, sedangkan untuk analisis data hasil belajar menggunakan uji-t diperoleh  (9.633)    (1.703). Jadi, dalam penelitian ini dapat disimpulkan bahwa terdapat pengaruh model pembelajaran kooperatif tipe STAD menggunakan media film animasi terhadap motivasi dan hasil belajar di MTs. Al-Intishor Sekarbela. Kata Kunci: kooperatif tipe STAD; media film animasi. ABSTRACTThis study aims to determine the effect of cooperative learning model type STAD using animated film media on student motivation and learning outcomes in MTs. Al-Intishor Sekarbela. This type of research is a quasi-experimental research design with a nonequivalent control group design. The population of this study were all MTs students. Al-Intishor Sekarbela with the research sample of class VII-A students as the experimental class and class VII-B as the control class. The sample was determined by using cluster sampling technique. Data collection techniques are using questionnaires to obtain learning motivation and subjective tests to obtain learning outcomes. Based on the results of the analysis of the motivation data after the treatment, the average value of the experimental class was 2.86 and the control class was 2.29, while for the analysis of the learning outcomes data using the t-test, it was obtained ttes  (9,633)> ttable (1.703). So, in this study it can be concluded that there is an effect of the STAD cooperative learning model using animated film media on motivation and learning outcomes in MTs. Al-Intishor Sekarbela. Keywords: cooperative type STAD; animation film media.
Co-Authors Ahmad Fudholi Akhwan Mashudi Akhwan Mashudi Amalia Latifa Amalia Syuzita Anggun Oktaviana Aris Doyan Badrun Badrun Baiq Lily Anggriani W Baiq Nora Kusumawardani Elma Ko'o Farizal Wahyudi Fata Tukloy Fatimatuzzahra, Fatimatuzzahra Hamka Hamka Ibrahim Ibrahim Ismail Ismail Khaeratin Shoaliha Kurniawan Arizona Lalu A. Didik Lalu Ahmad Didik Meiliyadi Maimun Maimun Maimun Maimun Maksum Utsman Muhammad Kafrawi Muhammad Wahyudi Muhammad Zohri Nevi Ernita Nur Faujiah Nur Latifah Nurfarida Nurfarida Nurhayati Nurhayati Nurul Savira Nurul Yakin Raehan Raehan Rahmatullah Rahmatullah Ratu Intan Berlian Rianita Bela Islami Solly Aryza Sri Yeni Suhirman Suhirman Sukran Sukran Yanita Syafitri Yusuf Yusuf