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All Journal Jurnal Sains dan Teknologi Natural B JFA (Jurnal Fisika dan Aplikasinya) JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Phenomenon : Jurnal Pendidikan MIPA Edu Sains: Jurnal Pendidikan Sains dan Matematika Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Jurnal Fisika FLUX Jurnal Sains Teknologi dan Lingkungan (JSTL) INKUIRI : Jurnal Pendidikan IPA Jurnal Pendidikan Fisika Journal of Natural Science and Integration Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Indonesian Physical Review Relativitas : Jurnal Riset Inovasi Pembelajaran Fisika

Lalu A. Didik

Universitas Islam Negeri Mataram

Author-ID : 2431380

Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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CRYSTAL STRUCTURE ANALYSIS OF CuCrO2 BASED ON XRD DATA USING GSAS SOFTWARE Lalu A. Didik; Muh. Wahyudi
Indonesian Physical Review Vol. 4 No. 1 (2021)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v4i1.73

The synthesis of CuCrO2 crystals by mixing CuO and Cr2O3 has been carried out using the solid reaction method at a temperature of 1200 0C. The characterization of the structure used XRD and analyzed using GSAS software. The results of characterization using XRD showed that no other phase occurred. This is evidenced by the absence of other phases from the results of refinement of measurement data with reference data and a value of χ 2 which is 1.222. The lattice parameter values resulting from the refinement of the CuCrO2 X-ray diffraction pattern are a = b = 2.9715 Å and c = 17.1104 Å with a cell volume of 130.584 Å 3. In addition to the lattice parameter values, the distance between atoms was also obtained, both Cu - O, Cr - Cr, and Cr - O.

ANALISA SIFAT LISTRIK DAN KANDUNGAN Fe NANO PARTIKEL PASIR BESI BERBASIS PASIR BESI SUNGAI UNTUK MENGETAHUI KUALITAS AIR SUNGAI Nuraini Saprianti; Lalu A. Didik; Ahmad Zohdi
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 7 No. 1 (2021): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v7i1.209

Penelitian ini bertujuan untuk mengetahui nilai kandungan mineral, karakteristik sifat listrik, konstanta dielektrik pasir besi serta mengetahui kualitas air sungai Pohgading desa Pohgading kecamatan Pringgabaya kabupaten Lombok Timur. Metode yang digunakan dalam penelitian ini yaitu metode deskriptif kuantitatif. Sintesis nanopartikel pasir besi yang diambil dari jarak 2 meter, 4 meter, 6 meter, 8 meter, dan 10 meter disintesis menggunakan metode kopresipitasi. Setiap sampel kemudian di AAS untuk mengetahui berapa persen (%) andungan mineral pasir besi. Dari hasil penelitian diperoleh nilai kandungan mineral pasir besi sungai Pohgading tersebar merata ditiap jarak pengambilan yakni 0,0172%, 0,0171%, 0,0172%, 0,0172%, 0,0172%. Pengukuran sifat listrik pasir besi sungai Pohgading menggunakan metode empat titik probe untuk menentukan resistivitas pasir besi dan plat sejajar untuk menentukan konstanta dielektrik. Resistivitas pasir besi sungai mengalami peningkatan ditiap-tiap jarak, pada jarak 2 meter sampai jarak 10 meter diperoleh 1,1 x 103Ωm sampai 1,7 x 103Ωm. Begitupun dengan nilai konstanta dielektrik, dimana pada jarak 2meter sampai 10 meter diperoleh 1,7 x 104F sampai 3,5 x 104F. Untuk kualitas air sungai dapat diketahui melalui analisis PH, suhu, konduktivitas dan TDS air. Sebelum dicampur dengan nanopartikel pasir besi PH air, suhu air, konduktivitas air dan TDS air diperoleh sebesar 5,95, 28,5°C, 640μS/cm, dan 370 ppm. Setelah dicampurkan nilai PH meningkat ditiap-tiap jarak pengambilan, pada jarak 2 meter sampai 10 meter diperoleh sebesar 5,97 sampai 6,00. Sedangkan suhu, konduktivitas dan TDS air sungai semakin rendah.

PENGUKURAN KONSTANTA DIELEKTRIK UNTUK MENGETAHUI KONSENTRASI LARUTAN GULA DENGAN MENGGUNAKAN METODE PLAT SEJAJAR Lalu A. Didik
JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar Vol 8 No 2 (2020): SEPTEMBER
Publisher : Pendidikan Fisika UIN Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jpf.v8i2.11416

Telah dilakukan penentuan hubungan antara konsentrasi larutan gula dengan nilai konstanta dielektriknya. Pengukuran konstanta dielektrik pada beberapa konsentrasi larutan gula mulai 5% sampai dengan 50% dengan peningkatan konsentrasi 5% menggunakan metode plat sejajar. Untuk penentuan konstanta dielektrik tiap konsentrasi larutan dilakukan pengukuran kapasitansi dengan variasi jarak antar plat. Sebelum pengukuran konstanta dielektrik larutan, dilakukan kalibrasi dahulu terhadap alat dengan mengukur konstanta dilektrik udara dan didapatkan nilai sebesar 1,05. Nilai ini berbeda dengan konstanta dielektrik udara referensi sebesar 1,00054 sehingga didapatkan eror sebesar 4,9 %. Nilai eror ini masih dalam tahap wajar sehingga alat dapat digunakan untuk mengukur konstanta dielektrik larutan. Hasil pengukuran menunjukkan bahwa nilai konstanta dielektrik menurun dari 6,64 (konsentrasi 5%) menjadi 3,97 (konsentrasi 50%). Hal ini disebabkan karena medan listrik local yang berlawanan dengan arah medan listrik luar dan hydration shell yang menyebabkan konstanta dielektrik larutan gula menurun seiring dengan peningkatan konsentrasi larutan gula

Effects of Polystyrene Solvent Difference on Morphology of Polystyrene Layers and Viscoelastic Properties of QCM Biosensors Susi Rahayu; Masruroh Masruroh; Djoko H Santjojo; Eka Rahmawati; Lalu A. Didik; Fadli Robiandi; Setyawan P Sakti
Natural B, Journal of Health and Environmental Sciences Vol 2, No 4 (2014)
Publisher : Natural B, Journal of Health and Environmental Sciences

In this research, a modified QCM surface was done to improve the performance of QCM biosensors. This modification is done by coating polystyrene (Ps) on a QCM with toluena and chloroform solvents. The polystyrene coating was performed using spin coating technique, the measurement of surface roughness values using non-contact topography measurement system TMS 1200, and the viscoelastic properties was analyzed by using an electrical impedance. The analysis result using TMS 1200 shows morphologies of polystyrene produced with chloroform solvent have groovier and more porous compared to the toluena solvent. The roughness values of Ps surface with choroform and toluena is about 616.52 nm and 578.9 nm, respectively. The different surface roughness both of the solvent is caused by vapor pressure of each solvent. The vapor pressure value of chlorofrom solvent is 0.26 atm and toluena solvent of 0.037 atm. Moreover, using Sauerbrey equation is found mass of deposited ps produced with chloroform solvent is more than the toluena solvent. The mass of the polystyrene deposited on the surface of QCM with chloroform resulted about 2.23 × 10-5 ± 7.59 × 10-7 g and with toluena of 1.16 × 10-5 ±9.23 × 10-8 g. Furthermore, viscoelastic test show both polystirene layer are still rigid and have approximately 12.23 Ω impedance value. Therefore, the different solvents affect the surface morphologies of Ps.

Effect of Xylene and Tetrahydrofuran Solvent Type on Polystyrene Layer Thickness With Spin Coating Method Eka Rahmawati; Fadli Robiandi; Lalu A Didik; Susi Rahayu; Djoko H Santjojo; Setyawan P Sakti; Masruroh Masruroh
Natural B, Journal of Health and Environmental Sciences Vol 2, No 4 (2014)
Publisher : Natural B, Journal of Health and Environmental Sciences

Surface modification of QCM by applying polystyrene (Ps) as a coating layer has been investigated. The PS layer was coated onto QCM sensor by using spin coating method. Polystyrene was dissolved in two different solvents i.e., xylene and Tetrahydrofuran (THF) with various concentration i,e 1%, 2%, 3%, 4%, 5% and the velocity angular of spin coater were 1500 rpm, 2000 rpm, 2500 rpm, 3000 rpm, 3500 rpm, dan 4000 rpm. The results show that different solvent result in the difference of thickness of polystyrene coating layer. By calculation with the Sauerbrey equation, the thickness of Ps layer using xylene solvent show 0.1 µm, 0.28 µm, 0.35 µm, 0.59 µm, and 0.81 µm. While by using THF, the thickness of each Ps layer are 0.15 µm, 0.43 µm, 0.84 µm, 0.97 µm, 1.28 µm. On the other hand, by applying different velocity of spin coater, the thickness of polystyrene with xylene are 0.486 µm, 0.445 µm, 0.432 µm, 0.350 µm, 0.320 µm, 0,290 µm, respectively. Moreover, the thickness of PS layer by using THF show 1.05 µm, 0.93 µm, 0.87 µm, 0.84 µm, 0.67 µm, 0.52 µm. Vapor pressure of each solvent is considered as the main property of solvent which influence the thickness of coating. The vapor pressure of THF (143 mmHg) is higher than the vapor pressure of xylene (72 mmHg), the thickness Ps layer with THF is thicker than that of by xylene solvents.

ANALISA TINGKAT PEMAHAMAN DAN MISKONSEPSI PADA MATERI LISTRIK STATIS MAHASISWA TADRIS FISIKA MENGGUNAKAN METODE 3-TIER MULTIPLE CHOICES DIAGNOSTIC Lalu A. Didik; Fitratul Aulia
Phenomenon : Jurnal Pendidikan MIPA Vol 9, No 1 (2019): Jurnal Pendidikan MIPA
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/phen.2019.9.1.2905

Telah dilakukan analisa tingkat pemahaman dan miskonsepsi mahasiswa tadris fisika Universitas Islam Negeri Mataram. Sub materi yang diuji disesuaikan dengan Rencana Pembelajaran Semester Mahasiswa pada Mata Kuliah Listrik Magnet yang mencakup Gaya Coulomb, Medan Listrik dan Potensial Listrik. Metode yang digunakan adalah 3-Tier Multiple Choices. Dalam metode ini ada tiga tahap jawaban mahasiswa yaitu jawaban konsep, alasan dan tingkat keyakinan. Berdasarkan hasil tes diagnostic terhadap mahasiswa diperoleh tingkat pemahaman penuh mahasiswa sebesar 42,92% dan tingkat miskonsepsi sebesar 23,61%. Mahasiswa mengalami miskonsepsi terbesar pada sub materi Medan listrik yaitu sebesar 37,50% dan terendah pada materi potensial listrik yaitu sebesar 10%. Walaupun persentase miskonsepsi tergolong kecil namun masih ada mahasiswa yang mengalami miskonsepsi pada setiap submateri.

Pembelajaran fisika berbasis CTL melalui metode eksperimen untuk meningkatkan motivasi dan hasil belajar materi tata surya Rosi Yulistia Wati; Hadi Kusuma Ningrat; Lalu A. Didik
Edu Sains: Jurnal Pendidikan Sains & Matematika Vol 9, No 1 (2021): VOLUME 9 NOMOR 1 JUNI 2021
Publisher : IAIN Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23971/eds.v9i1.2103

Penelitian ini bertujuan untuk meningkatkan motivasi dan hasil belajar ranah kognitif peserta didik pada materi tata surya menggunakan model pembelajaran berbasis Contextual Teaching and Learning (CTL) melalui metode eksperimen di kelas VII MTs. Al-Madaniyah Jempong Barat Kota Mataram. Jenis penelitian ini adalah penelitian tindakan kelas (PTK) yang dilakukan dalam 2 siklus. Metode pengumpulan data yang digunakan dalam penelitian ini adalah angket motivasi belajar, tes hasil belajar, lembar observasi aktivitas guru dan aktivitas peserta didik. Hasil penelitian menunjukkan bahwa penerapan pembelajaran fisika berbasis CTL melalui metode eksperimen dapat meningkatkan motivasi dan hasil belajar peserta didik. Hal ini dapat dilihat dari hasil angket motivasi belajar peserta didik mengalami peningkatan dari siklus I persentase motivasi peserta didik dengan kategori sedang mencapai 70%, persentase motivasi peserta didik dengan kategori tinggi mencapai 30%, kemudian pada siklus II mengalami peningkatan persentase motivasi peserta didik kategori sedang mencapai 25%, kategori tinggi dengan persentase 75%. Sedangkan untuk peningkatan hasil belajar peserta didik pada siklus I mencapai nilai rata-rata 57 dengan persentase ketuntasan klasikal 38%, untuk siklus II mencapai nilai rata-rata 71 dengan nilai ketuntasan klasikal 88%.

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

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

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.

Identifikasi Pencemaran Logam Berat di Sekitar Pelabuhan Lembar Menggunakan Analisa Parameter Fisika dan Kimia Nurhidayati Nurhidayati; Lalu A. Didik; Ahmad Zohdi
Jurnal Fisika FLUX Vol 18, No 2 (2021): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

ABSTRAK- Pelabuhan Lembar merupakan pelabuhan penyeberangan yang ada di pulau Lombok yang keberadannya sangat mempengaruhi kehidupan masyarakat khususnya dampak air yang ditimbulkan oleh aktivitas keluar masuknya kapal- kapal. Penelitian ini bertujuan untuk mengidentifikasi pencemaran logam berat yang ada disekitar Pelabuhan Lembar menggunakan analisa parameter fisika- kimia. Metode storet adalah metode yang digunakan untuk mengidentifikasi kualitas air yang parameter ujinya terdiri dari parameter fisika meliputi TDS, Konduktivitas Listrik, pH, serta suhu dan parameter kimia yang meliputi konsentrasi besi (Fe), kadmium (Cd), timbal (Pb), dan tembaga (Cu). Hasil uji tersebut menyatakan bahwa sebagian besar perairan di pelabuhan Lembar tidak terkontaminasi oleh logam berat. Hal ini dibuktikan dengan hasil pengukuran rata- rata untuk Fe sebesar 0,048 ppm, Cu tertinggi sebesar 0,0137 ppm, Pb tertinggi sebesar 0,0364 ppm, dan Cd tertinggi sebesar 0,0107 ppm.ABSTRACT- Lembar port is a ferry port on the island of Lombok. This port connects Lombok Island and Bali Island. The existence of the Lembar Port is very influential on people's lives, especially the I mpact of water caused by loading and unloading activities, remaining fuel from cargo ships, as well as pestilence from residents around the port waters. This study aims to identify heavy metal contamination around Lembar port using physico-chemical parameter analysis. The experiment method used to identify water quality whose test parameters consist of physical parameters including TDS, Electrical Conductivity, pH, and temperature and chemical parameters including concentrations of iron (Fe), cadmium (Cd), lead (Pb), and copper (Cu). The test results stated that most of the waters in the Lembar port were not contaminated by heavy metals. This is evidenced by the average measurement results for Fe of 0.048 ppm, the highest Cu at 0.0137 ppm, the highest Pb at 0.0364 ppm, and the highest Cd at 0.0107 ppm.

Co-Authors Ahmad Zohdi Alwan Mahsul Asri, Laelatul Aulia, Fitratul Bahtiar Bahtiar Bahtiar, Bahtiar Baiq Nora Kusumawardani Djoko H Santjojo Eka Rahmawati Fadli Robiandi Farizal Wahyudi Fatimatuzzahra, Fatimatuzzahra Fitrah Ningsih Fitratul Aulia Fitrianingsih Fitrianingsih Hadi Kusuma Ningrat Hidayati, Nur Shofia Husnul Aini Irfan Safarwadi Masruroh Masruroh Masruroh MASRUROH Masruroh Masruroh Muh. Wahyudi Muh. Wahyudi Muhammad Kafrawi Muslimah Muslimah Nur'aini, Nur'aini Nuraini Saprianti Nurhidayati Nurhidayati Rianita Bela Islami Rosi Yulistia Wati Setyawan P Sakti Susi Rahayu Wahyudi, Farizal Yahdi Yahdi, Yahdi Yahdi, Yahdi Yanita Syafitri

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