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All Journal Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Jurnal ABDINUS : Jurnal Pengabdian Nusantara Community Development Journal: Jurnal Pengabdian Masyarakat Jurnal Inovasi Pendidikan dan Sains JOURNAL OF COMMUNITY ENGAGEMENT AND EMPOWERMENT JUSTI (Jurnal Sistem dan Teknik Industri) JOSSE: Journal of Economics and Social Sciences Jurnal Teknologi dan Manajemen Sistem Industri (JTMSI) International Journal of Engineering Continuity Dedication : Jurnal Pengabdian Masyarakat Journal of Information System, Technology and Engineering Journal of Social Science and Economics
Amalia Ma’rifatul Maghfiroh
Universitas Bojonegoro
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Veterinary Other

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Journal : Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika

 1 
Analisi Pengaruh Kebisingan terhadap Kinerja Pandai Besi dengan Regresi Linier Amalia Ma'rifatul Maghfiroh; Zainudin Zainudin; Alfian Bima Chandra; Arum Sulistyorini
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 1 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i1.9453

Abstract

Noise in itself can be harmful or dangerous to health. The research objectives were to determine the noise value generated by blacksmiths and analyze the effect of noise levels on blacksmith performance. The research was conducted by direct observation and giving questionnaires to respondents. Data processing using the t-test to determine the level of noise and its effect on blacksmiths. This study's conclusion is the level of significant difference with the Threshold Value (NAV) set by the government, which is 99.328 dB (A). Meanwhile, the government's NAV for the work area (industry) is 85 dB (A). The simple linear regression analysis results indicate that noise in the blacksmith's work area has no significant effect on employee performance. This is shown from the test results of simple linear regression analysis through the t-test, obtained t count of -0.365 smaller than t table of 2.069 or the number sig. equal to 0.719, which is greater than α of 0.05.
Evaluasi Pengujian Termal dan X-Ray Diffraction Material Ka0,5Na0,5NbO3 Amalia Ma'rifatul Maghfiroh
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 6, No 1 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (632.121 KB) | DOI: 10.30870/gravity.v6i1.7060

Abstract

The structure of perovskite-based material contained in the niobate and titanate. The fabric was a perovskite crystal structure having the formula ABO3. Ferroelectric and piezoelectric materials had a perovskite structure. This material could store an electric charge, which was good because of the polarization resulting in a material that was a dielectric. Unleaded piezoelectric material, K0,5Na0,5NbO3 (KNN), was synthesized using reliable state methods. Synthesis was done by first setting up K2CO3, Na2CO3, and Nb2O5 as a base KNN system. Studies cover X-ray diffraction, thermal analysis TGA-DTA and lattice parameter analysis. From the TGA-DTA analysis obtained for KNN calcination temperature at 7000C for 2 hours can produce a single-phase ABO3 where A = (K, Na) and B = (Nb). Orthorhombic perovskite structure KNN material owned by P4mm space group with lattice parameters a = 3,572 Å; b = 3,570 Å; and c = 3,565 Å.
Karakterisasi dengan Spektroskopi Infra Merah (FTIR) Serbuk Bonggol Jagung Amalia Ma'rifatul Maghfiroh
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 9, No 1 (2023)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v9i1.17796

Abstract

Corn cobs contains 40-45% cellulose, 30-35% hemicellulose, and 10-20% lignin, while corn cobs ash contains more than 60% silica with small amounts of metal elements. Silica in corn cob powder can be isolated thermally and nonthermally. Nonthermally silica can be separated with HCl. This research was conducted to isolate silica from corncobs using HCl with variations in calcination temperature and holding time. The silica obtained was then characterized by bonding and its structure using infrared spectroscopy (FTIR). The steps taken were preparing the tools and materials, then preparing the corncob powder, and then preparing silica with HCL and FTIR, as well as data processing and analysis. This study concludes that corncob powder produces silica by isolating it using HCL at 70 ºC  for 3 hours and calcining at 800 ºC with a holding time of 4 hours. Based on its FTIR characterization, samples soaked in HCL at 70 ºC  resulted in absorption caused by several factors, including single NH, CH, OH, triple bonds, double bonds, and single bonds. This is reinforced by the FTIR results, where the peaks are in regions 1, 2, 3, and 4.
Co-Authors Abu Bakar Ahmad Maulana Alfian Bima Chandra Alfian Bima Chandra Ardana Farahdiansari Arum Sulistyorini Dyah Setyaningrum, Dyah Ilmi Nurul Istiqomah Muhammad Erick Aldiansyah Rio Chandra Pratama Rizky Stighfarrinata Rizky Stighfarrinata Silsa Zakaria Suciati, Diyah Ayu Sudirnanto Sulistyorini Arum Zainudin Zainudin