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All Journal Jurnal MIPA Jurnal Geliga Sains: Jurnal Pendidikan Fisika KOVALEN: Jurnal Riset Kimia Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Journal of Physics: Theories and Applications Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA JURNAL PENGABDIAN KEPADA MASYARAKAT ARSY : Jurnal Aplikasi Riset kepada Masyarakat International Journal of Applied Technology Research Jurnal Difusi PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Wahana Fisika : Jurnal Fisika dan Terapannya KOPEMAS Jurnal Pendidikan Kimia, Fisika dan Biologi Jurnal Pengabdian Masyarakat Indonesia
Hadiningrum, Kunlestiowati
Politeknik Negeri Bandug
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Studi Awal Pengaruh Temperatur terhadap Karakteristik Aliran Fluida Pada Belokan Pipa 90° melalui Simulasi Defrianto Pratama; Kunlestiowati Hadiningrum; Ratu Fenny Muldiani
Jurnal MIPA Vol. 11 No. 2 (2022)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jm.v11i2.41826

Abstract

Penelitian ini sebagai studi awal untuk mengetahui pengaruh temperatur fluida terhadap karakteristik aliran (laminar, transisi atau turbulen) dengan melihat perubahan tekanan, laju aliran dan bilangan Reynold pada belokan pipa. Aliran fluida (air) disimulasikan dengan software Ansys Fluent, kemudian didapatkan data perubahan tekanan, laju dan bilangan Reynold sepanjang pipa dengan belokan pipa 900. Hasil analisis data simulasi menunjukan bahwa setelah melewati belokan pipa 900, fluida dengan temperatur berbeda akan memiliki karakteristik aliran yang berbeda. 
PENENTUAN SUHU NOL MUTLAK MELALUI PRAKTIKUM TERMODINAMIKA MENGGUNAKAN HUKUM CHARLES Defrianto Pratama; Ratu Fenny Muldiani; Kunlestiowati Hadiningrum
Wahana Fisika Vol 3, No 2 (2018): December
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/wafi.v3i2.13944

Abstract

Praktikum Hukum Charles dirancang untuk mendapatkan nilai suhu nol mutlak yang menjadi konstanta fundamental di Termodinamika. Hukum Charles menyatakan bahwa pada tekanan tetap dan ruang tertutup, volume gas ideal berbanding lurus terhadap suhu mutlaknya. Hasil praktikum hukum Charles dengan mengunakan metode kuadrat terkecil, menunjukkan bahwa grafik volume terhadap suhu memiliki nilai koefisien determinasi rata-rata (R2) = 0,9986, hal ini menunjukkan bahwa volume dan suhu memiliki hubungan linier yang tinggi. Nilai suhu nol mutlak terbaik diperoleh sebesar -273,45 0C, sedangkan nilai suhu nol mutlak rata-rata diperoleh sebesar -275,90 0C dengan ketidakpastian relatif kurang dari 2 %.      Kata Kunci : Termodinamika; Hukum Charles; Suhu Nol MutlakThermodynamics is one of the basic concepts that must be mastered by engineering students at Politeknik Negeri Bandung, because it’s used to recognize how industrial engineering tools work. Laboratory activities can help students to understand a difficult thermodynamic concept. The purpose of this study was to design and optimize a Charles’s Law experiment device. Charles's Law experiment was designed to determine absolute zero temperature as a fundamental constant in thermodynamics. The experiment results show average of determination coefficient (R2) = 0,9986 on the V-T graph, it’s shows that the volume and temperature have a high linear relationship. The best absolute zero temperature was obtained at -273,450 C, while the average absolute zero temperature was obtained at -275,900 C with relative error of less than 2%.           Keywords :  Thermodynamics; Charles’s Law; Absolute Zero Temperature
The Effect of Capacitance on the Power Factor Value of Parallel RLC Circuits Hadiningrum, Kunlestiowati; Muldiani, Ratu Fenny; Pratama, Defrianto
Jurnal Internasional Penelitian Teknologi Terapan Vol 1 No 2 (2020): October 2020
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v1i2.27

Abstract

The power factor of the circuit is determined by the amount of pure resistance (R), self-inductance of the coil (L) and the capacitance of the capacitor (C). In this study, the measurement of the power factor value in a parallel RLC circuit was carried out through experimental testing and simulation with the value of C as the independent variable, while the values of R and L were fixed conditioned quantities. The purpose of this study was to determine the effect of capacitance on a parallel RLC circuit. One of the ways to improve the power factor value in a circuit is to install capacitive compensation using a capacitor. The relation between the power factor value and the capacitance and inductive reactance based on the experimental results and the simulation calculation results in the parallel RLC circuit both shows the same pattern with a relative uncertainty below 8%. The experimental results and simulation results both show that the power factor can be improved by using a right capacitance which is around the capacitance value when there is resonance in the circuit.
PENGEMBANGAN RUMAH IQRO AN-NUR SEBAGAI SOLUSI CERDAS MENUMBUHKAN BUDAYA BELAJAR ANAK USIA DINI DAN SEKOLAH DASAR DI MASA PANDEMI COVID-19 Nani Yuningsih; Kunlestiowati Hadiningrum; Siti Samsiyah Purwaningsih; Sardjito Sardjito; Anie Lusiani; Hazma Hazma; Wastu Kurning Purbandini
Konferensi Nasional Pengabdian Masyarakat (KOPEMAS) #5 2024 Konferensi Nasional Pengabdian Masyarakat (KOPEMAS) 2021
Publisher : Konferensi Nasional Pengabdian Masyarakat (KOPEMAS) #5 2024

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Rumah Iqro An-Nur, di Desa. Ciwaruga, Kec. Parongpong, Kab. Bandung Barat, merupakan tempat belajar kelompok pendidikan informal yang peserta didiknya terdiri atas anak usia dini hingga usia sekolah dasar. Di masa pandemic Covid-19, Rumah Iqro menjadi salah satu solusi dalam membantu warga yang kesulitan dalam pendampingi putra-putrinya Belajar Dari Rumah (BDR) karena terbatasnya kemampuan orang tuanya. Untuk memenuhi harapan warga yang mengirimkan putra-putrinya ke Rumah Iqro, perlu pengembangan Rumah Iqro berupa pengadaan sarana belajar. Selain itu perlu peningkatan kompetensi relawan dalam pemanfaatan alat peraga dan permainan edukatif serta metodologi Pendidikan anak mengingat latar belakang relawan yang tidak inline dengan Pendidikan anak. Sarana belajar yang menarik berupa Alat Permainan Edukatif (APE), alat peraga matematika kreatif, alat peraga sain, buku bacaan bergambar, dan fasilitas belajar telah diserahterimakan oleh Tim Pengabdian kepada Masyarakat Politeknik Negeri Bandung (POLBAN). Peningkatan kompetensi relawan pendamping belajar juga telah berhasil dilaksanakan dengan mengundang narasumber dari Dinas Pendidikan Cimahi untuk metodologi Pendidikan anak dan bimbingan teknik dari Tim pengabdian POLBAN untuk penggunaan alat peraga sain dan matematika. Sarana tersebut telah dimanfaatkan oleh tenaga relawan dalam pendampingan belajar anak-anak di Rumah Iqro. Sarana dan prasarana yang diberikan telah berhasil menarik minat belajar anak-anak dan harapannya tumbuh menjadi sebuah budaya belajar.
Pemanfaatan Limbah Puntung Rokok sebagai Inhibitor Korosi pada Baja St40 Menggunakan Metode Microwave Assisted Extraction (MAE) di Lingkungan NaCl 3,56%: Utilization of Cigarette Butts Waste as Corrosion Inhibitor on St40 Steel Using Microwave Assisted Extraction (MAE) Method in 3.56% NaCl Environment Alatif, Ikhsan Akmal; Permatasari, Rahma Puspa; Nurulgina, Rahma; Adzkia, Zahrotul Filza; Andayani, Puri; Putri, Sabrina Aisyah; Adinda; Trirahayu, Dhyna Analyes; Hadiningrum, Kunlestiowati
KOVALEN: Jurnal Riset Kimia Vol. 10 No. 3 (2024): December Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2024.v10.i3.17394

Abstract

Corrosion is a problem that occurs in many industries and causes large losses. The use of corrosion inhibitors is one way to reduce or inhibit corrosion. Cigarette butt waste extract can be utilized as an organic corrosion inhibitor. This study aims to determine the yield of cigarette butt waste extract, the content of cigarette butt waste extract produced using the MAE method qualitatively, determine the optimum conditions for the extraction process with the MAE method based on variations in microwave power of 150 and 300 watts and calculate the efficiency of corrosion inhibitors and the effect of compounds contained in cigarette butt waste extract in 3.56% NaCl environment. The optimum MAE condition was 150 watts and 15 minutes, with an extract yield of 54.38%. Based on the GC-MS test, it is known that cigarette butts waste extract contains alkaloid, terpenoid, and phenol compounds as corrosion inhibitor compounds. Based on corrosion inhibitor testing, the addition of cigarette butt waste extract corrosion inhibitors can suppress or reduce the corrosion rate that occurs on metals with an inhibitor efficiency of 79.19% in non-aerated conditions and 71.53% in aeration with an inhibitor concentration of 1000 ppm in a 3.56% NaCl environment.
Efektivitas Limbah Puntung Rokok sebagai Inhibitor Korosi dalam Medium Asam Klorida pada Baja A36 dengan Metode Microwave Assisted Extraction: Effectiveness of Cigarette Butts Waste as Corrosion Inhibitor in Hydrochloric Acid Medium on A36 Steel by Microwave Assisted Extraction Method Alatif, Ikhsan Akmal; Permatasari, Rahma Puspa; -, Maya Futri Nur Rachmat; Wulandari, Dwi Arsya; Sonia, Gina; Aura, Azma Addina; Trirahayu, Dhyna Analyes; Hadiningrum, Kunlestiowati
KOVALEN: Jurnal Riset Kimia Vol. 10 No. 3 (2024): December Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2024.v10.i3.17395

Abstract

Cigarette butts are one of the wastes found in many places, and their presence can damage the environment. One way to reduce the amount of cigarette butts waste is to process them into corrosion inhibitors. This study aims to extract tobacco from cigarette butts using 96% ethanol solvent by varying the extraction time for 5, 10, 15, and 20 minutes, and microwave power of 150 watts and 300 watts, and calculating the efficiency of corrosion inhibitors in acidic environments. The extraction method used was Microwave Assisted Extraction (MAE). From the extraction process, it is known that the optimum extraction power of 150 watts in 15 minutes produces the highest yield of 64.52%. Based on phytochemical and GC-MS tests, it is known that cigarette butt extract contains antioxidant compounds in the form of alkaloids, pyranones, and terpenoids as corrosion inhibitor compounds. Based on corrosion testing, it is proven that the addition of cigarette butt waste extract corrosion inhibitors can suppress or reduce the corrosion rate that occurs on metals with the most excellent efficiency of 82.26% with an extract concentration of 2000 ppm. And the SEM-EDX test results concluded that the corrosion inhibitor from cigarette butts waste extract can withstand the formation of rust on the metal.
Transformasi Pelayanan Desa Pameuntasan: Optimalisasi Sistem Administrasi Kependudukan Berbasis Web Neneng Nuryati; Akhmad Bakhrun; Muhammad Yunus Maulana; Carolina Magdalena Lasambouw; Kunlestiowati Hadiningrum
ARSY : Jurnal Aplikasi Riset kepada Masyarakat Vol. 6 No. 1 (2025): ARSY : Jurnal Aplikasi Riset kepada Masyarakat
Publisher : Lembaga Riset dan Inovasi Al-Matani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55583/arsy.v6i1.1215

Abstract

Pengembangan pelayanan digital di Desa Pameuntasan bertujuan untuk meningkatkan efisiensi dan aksesibilitas layanan publik. Metode yang digunakan adalah Software Development Life Cycle (SDLC) yang mencakup analisis kebutuhan, perancangan, implementasi, dan pengujian. Identifikasi masalah dilakukan melalui wawancara dan observasi terhadap Kepala Desa, Sekretaris Desa, serta perangkat desa lainnya, serta analisis terhadap website e-office dan praktik pelayanan desa. Pengumpulan data dilakukan dalam dua tahap: identifikasi jenis layanan prioritas dan studi dokumen peraturan terkait prosedur pelayanan. Pada tahap perancangan, desain aplikasi dan mockup dibuat mengikuti model SDLC, diikuti oleh pengembangan aplikasi sederhana yang selaras dengan aplikasi E-Office yang disediakan oleh pemerintah kabupaten. Implementasi aplikasi diuji melalui User Acceptance Test (UAT) untuk memastikan semua fitur berfungsi dengan baik dan sesuai kebutuhan pengguna akhir. Kendala utama yang dihadapi adalah pelayanan konvensional yang tidak efisien, sehingga solusi yang ditawarkan adalah aplikasi web yang lebih sederhana dan mudah digunakan. Aplikasi ini diharapkan dapat meningkatkan kinerja, efektivitas kerja, dan akuntabilitas perangkat desa. Pelatihan dan pendampingan bagi perangkat desa akan dilakukan untuk memastikan keberhasilan implementasi aplikasi ini. Dengan adanya aplikasi baru ini, diharapkan masyarakat Desa Pameuntasan dapat menerima pelayanan yang lebih prima dan efisien.
Perbandingan Efisiensi Energi Genset Menggunakan Bahan Bakar Biogas dan LPG pada Berbagai Tingkat Beban Listrik Hadiningrum, Kunlestiowati; Muldiani, Ratu Fenny; Pratama, Defrianto
Jurnal Pendidikan Kimia, Fisika dan Biologi Vol. 1 No. 2 (2025): Maret : Jurnal Pendidikan Kimia, Fisika dan Biologi
Publisher : Asosiasi Riset Ilmu Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/jupenkifb.v1i2.220

Abstract

Biogas is an alternative energy source that is environmentally friendly, cheap, easy to obtain and renewable. In general, all types of organic materials can be processed to produce biogas, however only homogeneous organic materials (solid and liquid) such as manure and urine (urine) of livestock are suitable for a simple biogas system. Biogas can be burned like LPG and on a large scale can be used to generate electricity, so that biogas can be used as an alternative energy source that is environmentally friendly and renewable. To determine the performance of biogas as an alternative energy source, in this research the method used is to compare the performance of Biogas with LPG gas as a source of electrical energy. Analysis of trial data per minute (RPM), with varying load levels, shows that the RPM of generators using LPG only decreases slightly as the electrical load increases, which shows that the generator is able to maintain more consistent performance. The RPM produced by LPG, which ranges from 2358 to 2420 RPM, indicates that the engine is running faster and more efficiently, while biogas has a lower RPM, ranging from 1715 to 1820 RPM, which indicates slower operation. LPG efficiency ranges from 89.60% to 98.12%, while biogas efficiency ranges from 74.67% to 89.60%. Even though biogas shows less stable performance than LPG, biogas still has potential as an alternative fuel, especially in areas that have limited access to LPG but have abundant sources of biogas raw materials. The use of biogas can reduce dependence on fossil fuels and reduce greenhouse gas emissions. Even though LPG is more efficient, biogas has significant potential to be developed as a more environmentally friendly alternative energy source because LPG relies on non-renewable fossil fuels and has a negative impact on the environment in the long term.
Perancangan Sistem Hibrid Berbasis Panel Surya dan LPG Sebagai Energi Alternatif Terbarukan Pratama, Defrianto; Hadiningrum, Kunlestiowati; Muldiani, Ratu Fenny
Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Vol. 9 No. 1 (2025)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A Hybrid System Based on Solar Panels and LPG offers an alternative energy solution that combines renewable solar energy with LPG for improved efficiency and reliability. Solar panels capture sunlight and convert it into electricity, which can be used immediately or stored in batteries for later use, such as at night or during cloudy weather. Solar energy is eco-friendly, renewable, and widely available. However, when solar energy is insufficient, LPG is used as a backup fuel for a generator to ensure continuous power supply. Although not renewable, LPG is cleaner than other fossil fuels like coal or oil. The hybrid system's advantage lies in its efficiency, as solar panels reduce LPG consumption, while LPG ensures uninterrupted power. This combination makes the system more reliable by providing energy even when one source is unavailable. Despite the use of LPG, this system is more environmentally friendly than relying solely on fossil fuels, as it reduces the overall need for LPG. Keywords: Solar Cells, LPG, Hybrid
Pendampingan Pembuatan Standar Operasional Prosedur Pembelajaran Pos Paud di Cimahi Utara Kota Cimahi Siti Samsiyah Purwaningsih; Kunlestiowati Hadiningrum; Nani Yuningsih; Sardjito Sardjito
JURNAL PENGABDIAN MASYARAKAT INDONESIA Vol. 1 No. 1 (2022): Februari : Jurnal Pengabdian Masyarakat Indonesia
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jpmi.v1i1.286

Abstract

Tujuan diselenggarakannya pendidikan anak usia dini (PAUD) adalah membentuk anak Indonesia yang berkualitas, yaitu anak yang tumbuh dan berkembang sesuai dengan tingkat perkembangannya sehingga memiliki kesiapan yang optimal dalam memasuki pendidikan dasar. Sesuai dengan anjuran dalam kurikulum PAUD, Standar Operasional merupakan prosedur kegiatan dibuat untuk mendukung proses pembelajaran yang dilakukan oleh guru agar pelaksanaan pembelajaran berjalan sesuai harapan, visi, dan misi lembaga yang berisi tatacara yang dilakukan guru dan anak dalam melaksanakan suatu kegiatan. SOP menjadi sistem yang memberikan pedoman kerja, kapan, dimana, oleh siapa dan cara bagaimana pembelajaran dijalankan terutama dalam mengatur program pembelajaran yang bersifat rutin dan habituasi. Sesuai hasil analisis situasi di Pos Paud Kenanga 12 kelurahan Pasir Kaliki kecamatan Cimahi Utara Kabupaten Bandung Barat terdapat keterbatasan pemahaman guru dalam pembuatan dan penggunaan SOP Pembelajaran PAUD, oleh karena itu dilakukan pendampingan pembuatan SOP pembelajaran. Hasil evaluasi pendampingan pembuatan SOP, sebanyak 90,9 % SOP telah dibuat, 80 % sesuai standar dan 20 % perlu perbaikan, karena keterbatasan Alat Permainan Edukatif (APE) yang dimiliki PAUD. Pada proses belajar mengajar 80 % guru sangat paham dalam membuat dan menggunakan SOP pembelajaran dan 20 % kurang paham dalam pembuatan SOP, sehingga dalam proses mengajar tidak selalu menggunakan SOP yang telah dibuat.
Co-Authors -, Maya Futri Nur Rachmat Adinda Adzkia, Zahrotul Filza Alatif, Ikhsan Akmal Andayani, Puri Aura, Azma Addina Bakhrun, Akhmad Carolina Magdalena Lasambouw Defrianto Pratama hazma hazma I Gede Rasagama Lusiani, Anie Muhammad Yunus Maulana Muldiani, Ratu Fenny Nani Yuningsih Neneng Nuryati Nurulgina, Rahma Permatasari, Rahma Puspa Putri, Sabrina Aisyah Sardjito Sardjito Sardjito Sardjito Siti Samsiyah Purwaningsih Siti Syamsiah Purwaningsih Sonia, Gina Trirahayu, Dhyna Analyes Wastu Kurning Purbandini Wulandari, Dwi Arsya