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All Journal IJCCS (Indonesian Journal of Computing and Cybernetics Systems) ILMU KELAUTAN: Indonesian Journal of Marine Sciences BULETIN OSEANOGRAFI MARINA METANA JURNAL KIMIA SAINS DAN APLIKASI Prosiding Seminar Nasional MIPA Prosiding Seminar Biologi Management of Aquatic Resources Journal (Maquares) Journal of Marine Research Jurnal Pengajaran MIPA Jurnal Buana Informatika Jurnal Pendidikan IPA Indonesia Jurnal Teknik Kimia Jurnal Pengkajian dan Pengembangan Teknologi Pertanian Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam PAWIYATAN Bioedukasi: Jurnal Pendidikan Biologi Jurnal Fisika Unand Jurnal Penelitian dan Pembelajaran IPA Indonesian Journal of Cancer Jurnal Kelautan Tropis Unnes Science Education Journal JIKO (Jurnal Informatika dan Komputer) Journal Of Vocational Health Studies Jurnal Pengabdian Masyarakat AbdiMas Bawal : Widya Riset Perikanan Tangkap Jurnal Pendidikan Ekonomi (JURKAMI) Voice of Wesley: Jurnal Ilmiah Musik dan Agama JPPS (Jurnal Penelitian Pendidikan Sains) Jurnal E-Bis: Ekonomi Bisnis Jurnal Ilmiah Wijaya Babali Nursing Research Caring : Indonesian Journal of Nursing Science Emphaty Cons : Journal of Guidance and Counseling Proceeding Biology Education Conference Journal of Tourism Economics and Policy Golden Ratio of Marketing and Applied Psychology of Business AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Jurnal Impresi Indonesia Pawiyatan Edubiologica Jurnal Penelitian Ilmu dan Pendidikan Biologi Jurnal Kebidanan, Keperawatan dan Kesehatan (J-BIKES) Education Journal: Journal Educational Research and Development Journal Of Artificial Intelligence And Software Engineering MANGGALI Ekobisman : Jurnal Ekonomi Bisnis Manajemen Journal Innovations Computer Science Serambi Engineering Advance Sustainable Science, Engineering and Technology (ASSET) INOVTEK Polbeng - Seri Informatika Journal of Midwifery Tiara Bunda Edubiologica: Jurnal Penelitian Ilmu dan Pendidikan Biologi BAABU AL-ILMI: Ekonomi dan Perbankan Syariah
Sri Redjeki
Prodi Farmasi, Poltekkes Bandung
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Factors Affecting The Main Hypertension Events in The Bukong Pandu Raya Village, West Kalimantan Redjeki, Sri; G. Sri Redjeki; Fulgensius Surianto
Caring: Indonesian Journal of Nursing Science Vol. 1 No. 2 (2019): Caring:Indonesian Journal of Nursing Science
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/ijns.v1i2.2053

Abstract

Hypertension contributes 9.4 million deaths from cardiovascular disease each year. The cause of hypertension is because some people have a bad lifestyle, people often do not maintain their diet and people often eat salted and fatty foods. The purpose of this research is to find out the factors that influence Primary Hypertension in Dusun Bukong, Pandu Raya Village, West Kalimantan in 2018. This research method used quantitative methods with descriptive correlation design and cross sectional approach. By using the Slovin formula a total sample of 197 respondents was obtained. The results of the study, by conducting a univariate analysis found that most respondents had a level of knowledge related to hypertension (62.9%), more than half had a good lifestyle (58.4%), income above the MSE (57.9%) and more of half had hypertension (54.9%). From the bivariate analysis using the Kendall's Tau B test and Kendall's Tau C, the results of the study are found: there is a significant relationship between the level of knowledge (p value = 0,000), lifestyle (p value = 0,000) and income (p value = 0.047) with the incidence of hypertension . Discussion: Knowledge, lifestyle and family income in Dusun Bukong, Pandu Raya village have a significant relationship with the incidence of hypertension, so that health workers are expected to continue to provide support and motivation to the community to continue to improve their knowledge and a healthy lifestyle.
Preparation of Calcinite Fertilizer from Golden Snail Shells by Calcination and Crystallization Processes Hadi, Nur Halizah; Muhaimin, M. Hadid; Redjeki, Sri
Advance Sustainable Science Engineering and Technology Vol. 6 No. 4 (2024): August-October
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v6i4.788

Abstract

The golden apple snail is a significant pest that damages crops and can lead to crop failure because it has a habit of consuming various soft plants, including young rice plants. Golden snail shells have a high calcium carbonate content of around 60.56%. Large calcium content can be used as a source for the production of calcium nitrate fertilizer. The stages in making calcinit fertilizer are washing the shell of gold snails and drying for 1-2 days. After that, size reduction is carried out to 50 mesh. After that, the calcination process was carried out with a variable temperature of 700,750,800,850,900 ℃ for 4 hours. The calcined shell is dissolved with HNO3 with a variable of 1-5 N for 1 hour. After that the solution is filtered from impurities and neutralized to pH 7. After that the solution is crystallized into white crystals. The largest Ca and N content was obtained at a calcining temperature of 900 and HNO3 5 N concentrations, namely Ca of 21.94% and N of 16.52%. The results showed that the higher the calcining temperature and the higher the HNO3 content, the higher the Ca content and N content
Evaluation of Multi-Algorithm Clustering for Marketplace MSME Segmentation Using a Big Data Analytics Approach Taufan, Anas; Redjeki, Sri
INOVTEK Polbeng - Seri Informatika Vol. 10 No. 3 (2025): November
Publisher : P3M Politeknik Negeri Bengkalis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35314/k9gn7n75

Abstract

The rapid development of the digital economy has significantly driven MSME activity on marketplaces like Tokopedia, generating vast heterogeneous datasets. This study conducted a comparative evaluation of six clustering algorithms, including K-Means, Agglomerative Clustering, and GMM, using the Silhouette Score, Davies–Bouldin Index (DBI), and Calinski–Harabasz Index (CHI). Using a standardized Tokopedia MSME dataset from Yogyakarta, empirical results showed Silhouette scores ranging from 0.050 to 0.057, DBI from 0.45 to 0.53, and CHI from 950 to 1310. Although indicating low absolute cluster separation, these values facilitated meaningful relative comparisons. Among the tested algorithms, agglomerative clustering with Ward linkage demonstrated the best relative performance and consistency. Metric variability was examined through multiple runs to ensure stability. The analysis identified three segments: high-performing, medium-performing, and high-potential MSMEs, serving as a foundation for data-driven strategies. These findings underscore the necessity of a consistent multi-metric evaluation approach in MSME big data clustering studies.
Recovery of Aluminum and Iron from Coal Fly Ash Waste using Microwave Assisted Extraction (MAE) for Coagulant Satrio, Wahyu Sugeng Bagus; Sari, Vini Fita; Panjaitan, Renova; Susilowati; Perwitasari, Dyah Suci; Redjeki, Sri; Triana, Nurul Widji
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 10 No. 1 (2026)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v10i1.878

Abstract

Coal fly ash is an industrial waste containing aluminium and iron with potential for reuse as coagulant materials. This study aimed to recover aluminium and iron from coal fly ash using Microwave Assisted Extraction (MAE) with hydrochloric acid, and to evaluate their application in textile wastewater treatment. Variations in HCL concentration (1-5 M) and extraction time (30-50 minutes) were examined to determine optimal conditions. The result showed that the highest recovery was achieved at 5 M HCL and 40 minutes, with aluminium and iron recovery of 48.4% and 78%. The extracted aluminium and iron were successfully applied as coagulants in textile wastewater treatment, resulting in significant reductions in color to 30 Pt-Co, turbidity to 26.9 NTU, and TSS to 46 mg/L, while maintaining a stable pH value at 6. All treated wastewater parameters complied with the applicable discharge standards. These finding demonstrate that MAE is an effective and promising approach for recovering aluminum and iron from coal fly ash and production sustainable coagulant for industrial wastewater treatment. Contribution to Sustainable Development Goals (SDGs):SDG 6: Clean Water and SanitationSDG 9 : Industry, Innovation, and InfrastructureSDG 12 : Responsible Consumption and ProductionSDG 13: Climate ActionSDG 15: Life on Land
Sintesis dan Karakterisasi Nanopartikel Perak Berbasis AgNO3 dan Ekstrak Daun Lamtoro (Leucaena Leucocephala) Untuk Aktivitas Antibakteri Ayu Rosyida Zam Zam; Amin, Nashrul; Redjeki, Sri
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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

Abstract

This study aims to synthesize and characterize silver nanoparticles (AgNPs) based on silver nitrate (AgNO₃) using Leucaena leucocephala leaf extract as a natural bioreducing agent, and to determine the effects of AgNO₃ concentration and stirring time on their morphology, stability, and antibacterial activity. The synthesis was carried out using AgNO₃ concentrations of 1.5, 2.5, 3.5, 4.5, and 5.5 mM, with stirring times of 2, 3, and 4 hours at room temperature. UV-Vis analysis showed that a concentration of 5.5 mM and stirring time of 3 hours produced a maximum absorption peak at approximately 430 nm, indicating the successful formation of stable silver nanoparticles. SEM analysis revealed spherical-shaped AgNPs with particle sizes ranging from 50 to 100 nm. The antibacterial activity test against Staphylococcus aureus ATCC 25923 showed an inhibition zone of 11.67 mm at 100% concentration, categorized as strong antibacterial activity. Therefore, the combination of 5.5 mM AgNO₃ concentration and 3 hours of stirring time was determined to be the optimum condition for producing stable silver nanoparticles with high antibacterial potential.
Co-Authors ., Iriani Abd. Rasyid Syamsuri Abdul Ghofar Achmad Edi Subiyanto Achmad Munandar Achyani Achyani, Achyani Ade Hari Siswanto Adi Rahmat Afandi, Yusuf Agus Indarjo Agus Sabdono Agus, Elsa Lusia Ahdiansyah, M Hafidz Aini, Firly Nur Alburhana, Lathifatusy Syifa Ali Djunaedi Almagribi, Ahmad Bilal Ambariyanto , Amin, Nashrul Anam, Aufa Anandita, Assifa Yusan Andrie Wijaya, Shendy Angga Dewi, Widya Novi Anggara, Muhammad Alyfansyah Rizky Anggaraeni, Chaterine Oktavia Anggraheny -, Anggraheny Anna Fitri Hindriana Anna Triningsih Ari Widodo Ariesta Artamevia, Nazwa Aris Ismanto Ayu Larasati Ayu Lestari, Mita Ayu Puspitasari, Ayu Ayu Rosyida Zam Zam Azizah T.N., Ria Badik, Muhammad Bagus Eko Hardiono Baharudin, Muhammad Teguh Baidhowie, Lutfil Hakim Bambang Yulianto Banun Sri Haksasi Baskoro Rochaddi Bayong Tjasyono Bustomi Cahyono, Arie Eko Chrisna Adhi Suryono Delianis Pringgenies Desyandri Desyandri Devi Nandita Choesin, Devi Nandita Dewi Novitasari Diah Permata Wijayanti Dodon Turianto Nugrahadi Duduh Abdul Bara Dwi Jatmiko, Dwi Dyah Suci Perwitasari, Dyah Suci Edi Wibowo Edi Wibowo Kushartono Edy Soesanto Edy Supriyadi Elfi Rimayati Endang Sri Susilo Endang Supriyantini Eny Inayati, Eny Erliyanti, Nove Kartika Fajar, Surya FIRDAUSI, Ifrohatul Dini Fitria Olivia franisa, anggi Fuad Ashari Fulgensius Surianto G. Sri Redjeki Gerhani, Febrina Gerry Firmansyah Gita, Irma Hadi Endrawati Hadi, Nur Halizah Haksan Darwangsa Handayani, Dwi Asih Kumala Hapsara, Hudanu Hariadi Hariadi Harry Firman Hartadi, I Gede Haryono, Yoyo Haula Robbi, M. Kautsar Heryoso Setiyono Hutagaol, Inggrid Debora I Nyoman P Aryantha Ika Ayuningtyas Indarwati, YM Iqbal Maulana Iriawati Iriawati Irwani Irwani Irwanto, Eko Islamiyah, Syuaibatul Ismawati Ismawati Ita Riniatsih Jihadi, Muhammad Shulhan Jusup Suprijanto K. Susilo, David Käll, Sofia Khaerul Umam, Khaerul Khasanah Khasanah Khonsa Rezkania, Gita khusnul khotimah Krisiyanto, Krisiyanto Kunarso Kunarso Kusdarjanti, Endang Kusumadiani, Tazkia Aulia Lelono, Satrio Kusumo Lies Mardiyana, Lies Lilik Maslukah Lita Rosa, Mia Laksmi Luky Adrianto Luluk Edahwati Luluk Elyana Maharani, Galung Dhiva Marini . Marselino, Frendy Mayunar Mimin Nurjhani K Mr Kusnadi Mrs Sariwulan Diana Muchamad Fajar Alamsyah Muh Yusuf Muhaimin, M. Hadid Muhajirin, Al Muhammad Reza Faisal, Muhammad Reza Muhammad Zainuri Mujayatun, Siti Muslih, Muhamad Musthofa, Danis Nurul Mustofa, Diah Ayu Mutiara Nurul Fajar Utami Mutiari Nurul Syam Utami Naufal, Nabil Neviyani Neviyani, Neviyani Ningrum, Marsella Ivon Citra Novi, Widya Nugroho Agus D Nugroho, Aditya Dwi Nur Halimah, Anisa Nur Taurif Syamsudin Putra Jaya Nur, Sofyan Hasanuddin Nurasyah Dewi Napitupulu Nuryani Rustaman Nusaputro, Kurnia Adi Oktarini, Rahmi Panatar, Jakfar Shodiq Panjaitan, Renova Philipus Uli Basa Hutabarat Pradana, Henrian Rizki Prameswari, Devi Diyah Ayu Praressha Wizurai Prasetiyorini, Pudhak Prasetyo, Sigit Nian Pratama, Candrika Prayoga Nugraha Taunay Prihandoko, Tri Leksono Purba, Sariaman Purwati K. Suprapto Putri Novianingrum, Milka putri, Ferninda Rahardiyana Putri, Hawa Aritma Sunarko Raden Ario Raden Mohamad Herdian Bhakti Radityo Adi Nugroho Rahayu, Fenny Winda Rakhmawan, Aditya Ramadhani, Aulia Dessy Rasid, Harun Al Raudina, Anggit Sapta Retno Hartati Retno, Yosy Ria Azizah Tri Nuraini Ria, Intan Ade Riandi Riandi Ristanti, Rahmadita Aulya Rizkina, Nurnazmilaila rojanah, rojanah rojanah Rudhi Pribadi S Tapilouw, Fransisca. Sagara, Bangkit Putra sanjaya, deki dwi Santi, Shinta Soraya Sari, Vini Fita Satori, Djam'an Satriani, Bayu Satrio, Wahyu Sugeng Bagus Satriya Pranata SD Sumbogo Murti Setiyadi, Agus Setyowati, Okti Sheila Puspa Arrum, Sheila Puspa Sianiwati Goenharto Sihite, Mombang Sintha Soraya Santi Siti Munawaroh Sri Mulyani Sri Redjeki Sri Sayekti Sri Turni Hartati Sri Wahjuni Sri Wulandari Sujati Sujayanty, Sri Sunarto, Sandy Ryan Hendrawanto Sunaryo Sunaryo Susilowati Tania, Sara TATI NURHAYATI Taufan, Anas Taufiq-Spj, Nur Tony Hadibarata, Tony Tri Mulyati, Tri Trianna, Nurul Widji Ubay, Jufri Ucu Rahayu Wafi, Azmi Sabilakisbatul Wahyu, Rindika Widhorini, Widhorini Widi Purwianingsih Wilis Ari Setyati Wishnuputri, Parameswari Iccha Nirmalabuddhi Yagus Cahyadi Yenny Anwar Yogaswara, Rachmad Ramadhan Yudhatama, Bayu Khrisna Yuliana Yuliana Yunika Ayu Setya W Ayu Setya W. Yunita Yunita Yustin Ragil Dewanti Yusuf Hilmi Adisendjaja Zihni Ihkamuddin