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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Pengabdian Magister Pendidikan IPA Dielektrika : Jurnal Ilmiah Kajian Teori dan Aplikasi Teknik Elektro KLIK: Kajian Ilmiah Informatika dan Komputer Unram Journal of Community Service (UJCS) JEITECH (JOURNAL OF ELECTRICAL ENGINEERING AND INFORMATION TECHNOLOGY)
Rosmaliati
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics Social Sciences

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Kombinasi Principal Component Analysis dengan Algoritma K-Means untuk Klasterisasi Data Stunting Gladys Fouriza Ibanez; Giri Wahyu Wiriasto; Rosmaliati
KLIK: Kajian Ilmiah Informatika dan Komputer Vol. 5 No. 1 (2024): Agustus 2024
Publisher : STMIK Budi Darma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30865/klik.v5i1.1977

Abstract

Dompu Regency in West Nusa Tenggara ranks as the fourth highest regency in terms of stunting prevalence among toddlers in the NTB province in 2022, with a rate of 34.5%. This study utilizes data from the Dompu Regency Health Office in 2023, covering 81 villages and six variables that influence the prevalence of stunting. The objective of this research is to determine and understand the characteristics of areas based on stunting factors in Dompu Regency using the K-Means Clustering method combined with Principal Component Analysis (PCA). The K-Means method produces clusters that represent areas with different characteristics, derived from the data reduction results of PCA, which form the principal components. The optimization of the number of clusters using the Elbow method indicates 3 clusters, consisting of Zone Type 1 with 42 villages, Zone Type 2 with 12 villages, and Zone Type 3 with 27 villages. Subsequently, an evaluation phase using the Silhouette method resulted in 2 clusters: Zone Type 1 with 54 villages and Zone Type 2 with 22 villages, with a Silhouette Score of 0.53, indicating a fairly good cluster structure. PCA produced two principal components with the highest eigenvalues, each explaining 58.7% and 14.28% of the variance, with a cumulative variance of 72.9%. This demonstrates that these two principal components can effectively represent the factors influencing stunting prevalence in Dompu Regency.
Utilization of Biogas Energy for Pasteurization in Sembalun Mushroom Initiative Zubaidah, Teti; Rosmaliati; Rokhmat, Joni; Muntari; Niseng, Zakee; Nurcahaya; Saputra, Ramdani; Akbar, Lalu Muhamad Roviq; Gunada, I Wayan; Hidayat, X Zardht Alex
Unram Journal of Community Service Vol. 6 No. 3 (2025): September
Publisher : Pascasarjana Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ujcs.v6i3.1174

Abstract

The Sembalun Mushroom Initiative aims to strengthen food security and resilience to disasters in Sembalun Bumbung and circumstance villages through the utilization of biogas energy for the pasteurization process of mushrooms. These areas are prone to disasters, making the supply of food and sustainable energy a major challenge. The project utilizes cow dung waste as an environmentally friendly biogas source to support pasteurization and mushroom cultivation. Traditionally, mushroom pasteurization processes still use firewood, which triggers deforestation, high carbon emissions, and health risks from smoke. The community service team from the University of Mataram has developed biogas technology as an alternative solution. The biogas installation at the At-Tazkiyah Islamic Boarding School was completed in May 2024 and began operating in July 2024, thereafter a mushroom house has been built for mushroom cultivation in early 2025. During this community service project, a gas pasteurization system is installed and used for pasteurization, followed by training and capacity building for the community in utilizing green energy sources. The aim is to introduce a transition to environmentally friendly technologies, as well as to support innovation, sustainability, and community engagement. The activities are an international collaboration between the Postgraduate Program and the Faculty of Engineering at University of Mataram and the Fatoni University in Thailand. It is expected to expand Unram's international exposure and strengthen cooperation between countries.
Tingkat Pengetahuan Masyarakat Tentang Pemanfaatan Sampah Rumah Tangga Menjadi Energi Terbarukan Biogas di Desa Sembalun Bumbung, Provinsi NTB Rosyantita, Tania Tri; A'yunin, Intan Qurratun; Tri Putri, Geby Harlia; Rosmaliati
Jurnal Pengabdian Magister Pendidikan IPA Vol 7 No 3 (2024): Juli - September
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v7i3.7876

Abstract

The village of Sembalun Bumbung is one of the villages with the widest geographical area in the Sembalun District, East Lombok Regency, West Nusa Tenggara Province covering 15 hamlets. The significant number of hamlets and residents in the village poses a serious issue, namely, the problem of waste. The absence of temporary disposal sites and distant final disposal sites prompts the people of Sembalun Bumbung to dispose of their waste into the river. Socialization and education efforts are conducted among the community to encourage the separation of organic and inorganic waste and utilize them as a source of renewable energy, such as biogas from household waste (SRT) like vegetable scraps, leaves, and food leftovers. Biogas processing is carried out using simple digester tools. Socialization and education are implemented by bringing in speakers. Socialization involves distributing knowledge questionnaires to 25 respondents, which are then analyzed using Microsoft Excel and SPSS version 20. The results of the questionnaire analysis, using the Paired Simple Test method, yielded a value of 0.000 (<0.05). The conducted socialization and education have been successful in enhancing the community's knowledge regarding biogas and the separation of organic and inorganic waste.
Analisis Performa Rasio Daya Yang Dihasi;kan Pv Modul Pada Array Box 881 Di PLTS 7 Mwp Umar Mukhtar; Paniran; Rosmaliati
DIELEKTRIKA Vol 12 No 1 (2025): DIELEKTRIKA
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dielektrika.v12i1.400

Abstract

Sumber energi terbarukan dimasa mendatang akan semakin mempunyai peran yang sangat penting dalam memenuhi kebutuhan energi.Saat ini pemanfaatan energi terbarukan renewable energy sedang digalakkan untuk dapat mengurangi pemakaian energi tidak terbarukan. potensi tenaga matahari di Indonesia dalam menerima matahari harian persatuan luas ±4,8 kW/m2. Penerimaan radiasi energi matahari di Indonesia lebih kecil dibandingkan dengan Australia Tengah, Amerika Tengah, sebagian negara di Eropa (6,0 kW/m2), Arab Saudi, Mesir dan beberapa negara di Afrika (5,5 kW/m2).Efisiensi merupakan salah satu indikator mengetahui performansi dari suatu panel suryametode kualitatif dengan pendekatan deskriptif evaluasi. Data hasil penelitian akan menggambarkan kinerja dari solar cel di pada array box 881 di PLTS 7MWp Pringgabaya, kemudian data tersebut akan dievaluasi sesuai dengan standar IEC 61724. Instrumen penelitian yang digunakan berupa data pengukuran irradiansi matahari, arus yang dihasilkan oleh modul surya dan tegangan yang dihasilkan oleh modul surya.Pengukuran dilakukan dengan mengambil sampel data pada array box 881 tanggal 17 Juni 2024.Luas Pv modul didapatkan dari perhitungan antara panjang 1,98 m dikali dengan lebar 0,95 m diperoleh hasil 1,881 m2, dengan jumlah banyaknya PV 40 unit PV modul sehingga didapatkan 75.24 m2. Nilai iradiasi yaitu 908.8957 sehingga didaptkan daya input sebesar 68167.177 wat. Data daya output panel surya pada pukul 12.00 menghasilkan 660.3056 Volt dan 15.26246 Ampere atau daya output sebesar 10077.88Watt. Performa rasio modul photovoltaic 325wp PLTS 7MWp sebesar 75.24 m2, sehingga masih dalam kategori bagus yaitu 83.1 - 86.7%.
Unraveling the Seismic Signal Anomaly at Mount Rinjani Station: In-Depth Exploration with the Detrended Fluctuation (DFA) Analysis Method in Connection with the 2018 Big Earthquake on Lombok Island, West Nusa Tenggara Kanata, Bulkis; Rosmaliati; Zubaidah, Teti; Yadnya, Made Sutha; Zainuddin, Abdullah; Ratnasari, Dwi; Fitratunnisa, Nur; Akbar, Muhammad Fajrin
Jurnal Penelitian Pendidikan IPA Vol 10 No 1 (2024): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i1.6263

Abstract

We analyzed the seismic signals of the Mount Rinjani station to identify possible seismic anomalies before a series of major earthquakes on Lombok Island in 2018. We observe anomalies before earthquake events Mw >= 5.90. This research applies the detrended fluctuation analysis (DFA) method to investigate possible earthquake precursors associated with the analyzed earthquake. The results showed a relationship between scaling seismic signals (α) that exceeds the threshold of α values during the analysis period, and there is a deviation of the root mean square fluctuations in the corresponding scaling that should be rising but constant. The value of α with constant root mean square fluctuations occurs one to three days before the preliminary earthquake Mw 6.40 (28/07/2018) UTC and eight to 10 days before the main earthquake Mw 6.90 (05/08/2018). The Mw 6.90 earthquake had the most magnitude and could significantly contribute to the appearance of seismic anomalies.
Analisis Pengaruh Soiling Loss Terhadap Performance Ratio (PR) Setiap String Pada Array Box 114 Di PLTS 7 MWp Sultan; Rosmaliati; Mu'minin, Amirul
JEITECH (JOURNAL OF ELECTRICAL ENGINEERING, INFORMATION TECHNOLOGY, CONTROL ENGINEERING, AND ROBOTIC) Vol. 3 No. 3 (2025): Edisi November 2025
Publisher : Depertment of Electrical Engineering University of Mataram

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

Abstract

The demand for electricity in Indonesia continues to increase, while dependence on fossil fuels poses significant environmental impacts. Solar energy offers a strategic solution, as the country benefits from high solar irradiation throughout the year. One of the factors affecting the performance of Solar Power Plants (PLTS) is soiling loss, which refers to the reduction of energy output due to dust accumulation on photovoltaic (PV) module surfaces. This study was conducted at a 7 MWp PLTS through field observations and mathematical calculations to analyze the influence of soiling loss on performance ratio (PR). The results showed that soiling loss ranged from 2.37% to 28.68%, with PR values varying between 87.20% and 61.97%. Graphical analysis revealed a negative correlation, where higher soiling loss corresponds to lower PR values. Therefore, effective maintenance strategies, such as routine module cleaning based on monitoring data and the application of anti-soiling technologies, are essential to maintain the efficiency and reliability of PLTS operations.
OPTIMASI SUHU TERHADAP KUALITAS MINYAK HASIL PIROLISIS LIMBAH PLASTIK Aziz, Muhammad Iqromul; Rosmaliati; Paniran
JEITECH (JOURNAL OF ELECTRICAL ENGINEERING, INFORMATION TECHNOLOGY, CONTROL ENGINEERING, AND ROBOTIC) Vol. 3 No. 3 (2025): Edisi November 2025
Publisher : Depertment of Electrical Engineering University of Mataram

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Abstract

Penelitian ini bertujuan untuk mengevaluasi pengaruh optimasi suhu terhadap kualitas minyak hasil pirolisis dari limbah plastik. Proses pirolisis dilakukan di Badan Riset dan Inovasi Daerah (BRIDA) Provinsi Nusa Tenggara Barat dengan menggunakan mesin pirolisis yang dirancang khusus untuk mengonversi limbah plastik menjadi bahan bakar cair. Hasil pirolisis menghasilkan empat fraksi utama, yaitu nepta, pertalite, solar, dan minyak tanah. Data eksperimental menunjukkan bahwa setiap fraksi minyak memiliki rentang suhu dan waktu pirolisis yang optimal, yang bervariasi bergantung pada jenis plastik yang digunakan. Rentang suhu optimal berkisar antara 150°C hingga 250°C, dengan kualitas dan kuantitas minyak terbaik diperoleh pada kondisi operasi tertentu. Optimasi parameter suhu terbukti dapat meningkatkan efisiensi proses serta mutu produk minyak yang dihasilkan, sehingga teknologi ini berpotensi menjadi alternatif strategis dalam pengelolaan limbah plastik secara berkelanjutan.
Co-Authors A'yunin, Intan Qurratun Akbar, Lalu Muhamad Roviq Akbar, Muhammad Fajrin Aziz, Muhammad Iqromul Bulkis Kanata Dwi Ratnasari Fitratunnisa, Nur Giri Wahyu Wiriasto Gladys Fouriza Ibanez Hidayat, X Zardht Alex I Wayan Gunada Joni Rokhmat Made Sutha Yadnya Mu'minin, Amirul Muntari Muntari Niseng, Zakee Nurcahaya Paniran Rosyantita, Tania Tri Saputra, Ramdani sultan Teti Zubaidah Tri Putri, Geby Harlia Umar Mukhtar Zainuddin, Abdullah