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All Journal JMPM (Jurnal Material dan Proses Manufaktur) Desimal: Jurnal Matematika Jurnal SOLMA JURTEKSI Jurdimas (Jurnal Pengabdian Kepada Masyarakat) Royal JIKA: Jurnal Ilmu Keuangan dan Perbankan Jurnal Matematika UNAND SIGMA TEKNIKA Jurnal Siteba Jurnal Sintak STATISTIKA Journal of Mathematics, Computation and Statistics (JMATHCOS) Indonesian Journal of Jamu Integra: Journal of Integrated Mathematics and Computer Science Analit: Analytical And Environmental Chemistry
Handayani, Vitri Aprilla
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Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Medicine & Pharmacology Social Sciences Other

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ANALISIS KANDUNGAN LOGAM DALAM LIPSTIK MELALUI SPEKTROFOTOMETRI UV-VIS Rahmiati, Sari; Handayani, Vitri Aprilla; Sabrina, Nadia; Mulyono, Mulyono; Okti, Herpina
Analit : Analytical and Environmental Chemistry Vol. 8, No. 02 October (2023) Analit: Analytical and Enviromental Chemistry
Publisher : Jurusan Kimia FMIPA Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/aec.v8i2.2023.p98-107

Abstract

Cosmetics have become one of the most sought-after aspects for women today. One commonly used cosmetic product is lipstick, which is used to add color to the lips. This research aims to identify the presence of heavy metals in lipstick samples. The study encompasses two types of tests: qualitative and quantitative analysis of metal content in lipstick. The qualitative test aims to determine whether lipstick contains certain metals using simple reagents. Meanwhile, the quantitative test, involving the use of a UV-VIS spectrophotometer, is conducted to determine the concentration of metals that produced a positive result in the qualitative test. The qualitative test results indicate that the lipstick sample contains iron (Fe) as it exhibits a red color change. The quantitative test results reveal that the concentration of Fe in the lipstick is 6.0034 mg/kg, exceeding the recommended threshold set by the Department of Health (Depkes) Keywords: Trace Metal, Lip, UV-Vis Spectrophotometry
ANALYSIS OF BLOOD COCKLE SHELL CONTENT AS A BIOCOMPOSITE MATERIAL ON ULTISOL SOIL Rahmiati, Sari; Mardiansyah, Yopy; Handayani, Vitri Aprilla; Wasiru, Moh. Arafat
Analit : Analytical and Environmental Chemistry Vol. 9, No. 01 April (2024) Analit : Analytical and Environmental Chemistry
Publisher : Jurusan Kimia FMIPA Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/analit.v9i01.167

Abstract

This research used blood cockle shells (Anadara granosa) originating from consumption waste in the Batam City area. Cockle shell samples were taken and prepared for analysis of mineral content using the FTIR method, including CaCO3 and other minerals. The blood cockle shells were applied to ultisol soil in Batam City to improve its fertility. The shells were crushed into a fine powder, then mixed with ultisol soil with several treatments, including 0 grams (control), 10 grams, 20 grams, and 30 grams with a soil mass composition of 220 grams for each treatment. The mixture of soil and shell powder was stirred until homogeneous before being applied to mustard greens plants. Based on the research results, the addition of shell powder had an effect on the level of plant fertility. The experimental results carried out showed an effect on each treatment given. This is in line with statistical testing with analysis of variance, obtaining a sig. value of 0.037 < α = 5% (0.05), indicating a significant difference in treatment for each treatment.
FUZZY LOGIC UNTUK MENENTUKAN PEMBELIAN GITAR LISTRIK MENGGUNAKAN METODE SUGENO Handayani, Vitri Aprilla
JURNAL SITEBA Vol. 1 No. 1 (2022): Jurnal Sistem Informasi ITEBA
Publisher : LPPM-ITEBA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (285.274 KB) | DOI: 10.62375/siteba.v1i1.7

Abstract

Tak dapat dipungkiri bahwa gitar ikut berperan penting dalam berkembangnya musik di penjuru dunia. Akan tetapi, tak jarang orang awam yang tidak tahu bagaimana memilih gitar yang berkualitas dan sesuai dengan yang dikehendaki. Biasanya orang yang baru memulai keinginannya untuk memainkan instrument gitar cendrung salah dalam memilih. Terkadang mereka hanya tertarik dengan desain tanpa tahu karakteristik instrument tersebut. Misalnya dari segi bahan baku, proses pembuatan, karakter suara yang dihasilkan, dan komponen tambahan yang ada, serta apakah nantinya bisa sesuai jenis musik yang diinginkan. Berdasarkan hal yang ada maka penulis berinisiatif melakukan penelitian yang nantinya dapat mempermudah seseorang yang baru akan mengenal gitar dapat memilih gitar yang tepat. Banyak cara yang dapat digunakan dalam menyelesaikan masalah pemilihan gitar, salah satunya adalah dengan menggunakan metode Sugeno dalam Fuzzy Logic, maka penulis tertarik untuk mengambil judul penelitian yaitu: “FUZZY LOGIC MENENTUKAN PEMILIHAN GITAR ELEKTRIK MENGGUNAKAN METODE SUGENO.”
Penerapan Cooler Box Bertenaga Panel Surya untuk Meningkatkan Kualitas Hasil Tangkapan Nelayan di Daerah Kepulauan Wibowo, Sadiq Ardo; Handayani, Vitri Aprilla; Hernando, Luki; Devikaduri, Laras; Tuto Bakang, Clarita; Eka Candra, Joni
Jurnal SOLMA Vol. 14 No. 3 (2025)
Publisher : Universitas Muhammadiyah Prof. DR. Hamka (UHAMKA Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/solma.v14i3.19529

Abstract

Background: Limited fish storage facilities are a major factor contributing to the decline in fish quality among fishermen in island areas, which ultimately reduces market value. This community service activity aimed to implement a solar-powered cooler box as an efficient and environmentally friendly storage solution for fishermen in remote coastal regions. Method: The method included a needs assessment, design and installation of a 40-liter cooling system with a 100 WP solar panel, and training on operation and maintenance for fishermen in the Belakang Padang Islands. Results: The results showed that the storage temperature could be maintained between 2–4°C for 8–10 hours daily without relying on conventional electricity. The use of this equipment reduced the spoilage rate of fish from an average of 28% to 10%, and increased selling prices by an average of 18%. Conclusion: This program demonstrates that renewable energy technologies can contribute to improving the quality of fish catches and the economic well-being of fishermen in a sustainable manner.
Co-Authors Alhamidi, Alhamidi Anggraeni, Andini Setyo Anjani, Syarli Dita Arafi, Adamsyam Arrafi, Adamsyam Auwalia, Farda Azhari, Fiqri Ardi Azzahra, Nabila Betricia , Jesicca candra, joni eka Devikaduri, Laras Eko Sulistyono Eko Sulistyono Sulistyono Farit Mochamad Afendi Harahap, Diana Sari Hazimah, Hazimah Hernando, Luki Irianto, Ardhiya Syifa Islamiati, Dian Jonathan, Steven Lestari, Windi Lilies Handayani Lunardi, Louis Majiid, Arsyil Mardiansyah, Yopy Muhammad Agus Muljanto Mulyono Mulyono Mustofa Usman Nahrul Hayati Nur Asikin Okti, Herpina Putri, Tia Aura Rahayu , Sri Rahmad Rahmad Rahmiati, Sari Sabarinsyah, Sabarinsyah Sabrina, Nadia Sadiq Ardo Wibowo, Sadiq Ardo Sari Rahmiati Sembiring, Rinawati Sihombing, Urianto Siti Laelatul Chasanah, Siti Laelatul Sunarsono, Hery Taufiq Rahman Tuto Bakang, Clarita Utama, Rifki Chandra Utami, Arli Magfirah Utami, Bernadhita Herindri Samodera Utami, Bulan Purnama Varischa, Bintang Wasiru, Moh. Arafat Widiarti Widya Reza Wisnu Ananta Kusuma Yoka, Ranara Athalla