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JSN : Jurnal Sains Natural
Published by Puslitbang Sekawan Institute Nusa Tenggara
ISSN : -     EISSN : 29873258     DOI : https://doi.org/10.35746/jsn.v1i2.343
Core Subject : Health, Science, Education, Engineering,
Chemical Engineering, Chemistry & Bioengineering Mathematics Nursing Physics Public Health
Jurnal Sains Natural : merupakan Jurnal Ilmiah bidang sains dan eksakta yang dikelola oleh Pusat Penelitian dan Pengembangan (PUSLIBLTBANG) SEKAWAN Institue, Mataram, Nusa Tenggara Barat Jurnal ini dikelola oleh para dosen dan praktisi yang berasal dari berbagai background perguruan tinggi di Indonesia khususnya NTB. Jurnal Sains Natural terbit 4 (empat) kali dalam 1 tahun yaitu setiap bulan Februari, Mei, Agustus, danNovember. Jurnal Sains Natural menargetkan setiap issues terdiri dari 20 artikel per volume secara konsisten setiap terbit. Cakupan dan Fokus Jurnal ini pada Bidang Ilmu Sains  dan atau yang serumpun dengannya dengan cakupan tema seperti Biologi, Kimia, Fisika, Matematika, Statistik, Ilmu Komputer, Sains Data dan lainnya yang masih serumpun dengan bidang Ilmu Sains dan Eksakta.
Arjuna Subject : Umum - Umum
Articles 61 Documents
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The Relationship Of The Construction Cost Index To Human Development Index In West Nusa Tenggara Az-Zahra, Al Farrah; Robbaniyyah, Nuzla Af'idatur
JSN : Jurnal Sains Natural Vol. 3 No. 1 (2025): Februari
Publisher : Puslitbang Sekawan Institute Nusa Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35746/jsn.v3i1.680

Abstract

The Construction Cost Index (CCI) is an index that describes how expensive it is to build a building, the higher the index, the greater the cost. Meanwhile, the Human Development Index (HDI) is an index used to measure the quality of life of the people in a region, the higher the value, the better the quality of life. It is important to know how the pattern and dynamics of the relationship between CCI and HDI. Therefore, this paper aims to determine the relationship between CCI and HDI in West Nusa Tenggara Province. The data taken is secondary data derived from Central Bureau of Statistics. First, define the hypothesis between CCI and HDI, where CCI and HDI are assumed to have a negative relationship, which means that the higher HDI, the lower CCI, and vice versa, the lower HDI, the higher CCI.The average CCI in West Nusa Tenggara falls into the high category, as does the HDI. After that, compare the CCI and HDI values in each region with the previous region, where Makassar City is used as the initial comparison for the CCI category, as it is the region closest to or equal to the national average index. As a result, most regions show the hypothesized negative relationship. out of 10 regions, only Sumbawa District, West Sumbawa District, and Bima District show a negative relationship.
Comparison of Consumer Price Change In Traditional Pagesangan Market : June and July 2024 Choirunnisa, Fajarani; Robbaniyyah, Nuzla Af'idatur
JSN : Jurnal Sains Natural Vol. 3 No. 1 (2025): Februari
Publisher : Puslitbang Sekawan Institute Nusa Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35746/jsn.v3i1.681

Abstract

This study aims to investigate the process of consumer price enumeration at the traditional Pagesangan Market, Mataram City, during July 2024, and analyze the percentage changes in commodity prices between June and July 2024. The research employs a descriptive qualitative approach, involving systematic steps such as field observations, formation of an enumeration team, training on survey methods, and direct data collection using questionnaires. Results indicate significant price fluctuations among key commodities: mackerel and cayenne pepper recorded price increases of up to 35% and 30%, respectively, due to limited supply and disrupted harvests. In contrast, tomato prices fell sharply by about 40% due to a surplus during the peak harvest season. Analysis reveals that seasonal factors, supply chain dynamics, and consumer demand are the primary drivers of these changes. The findings highlight the importance of maintaining price stability through targeted policies, particularly for essential goods that directly affect consumer purchasing power.
Optimalisasi Omzet Penjualan Kaos Pada Usaha Konveksi Rumah Kaos Lombok Menggunakan Metode Simpleks Ratih, Wahyu Erinna; Setiandini, Gifani Putri; Risnawati, Risnawati; Maharani, Andika Ellena Saufika Hakim; Alfian, Muhammad Rijal
JSN : Jurnal Sains Natural Vol. 3 No. 1 (2025): Februari
Publisher : Puslitbang Sekawan Institute Nusa Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35746/jsn.v3i1.684

Abstract

Rumah Kaos convection is a manufacturing company that focuses on producing high-quality t-shirts with a variety of design options. This research aims to optimize turnover from t-shirt production by applying a linear programming approach using the simplex method. The data analyzed includes product type, raw materials, working time and selling price. The analysis process is carried out by compiling objective functions, constraint functions, and simplex table modeling. The results of this research show the optimal combination in raw material allocation that can maximize profits. It is hoped that these findings will serve as a strategic guide for entrepreneurs in planning production efficiently and achieving sustainable business growth.
Prediksi Harga Beras di Provinsi Nusa Tenggara Barat Dengan Metode Least Square Approximation Anjani, Aulia Fadma; Choirunnisa, Nabila; Haizar, Maulana Rifky; Robbaniyyah, Nuzla Af’idatur; Rusadi, Tri Maryono
JSN : Jurnal Sains Natural Vol. 3 No. 1 (2025): Februari
Publisher : Puslitbang Sekawan Institute Nusa Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35746/jsn.v3i1.690

Abstract

The Linear Least Square Approximation method is applied to predict rice prices in West Nusa Tenggara (NTB) Province. The price of rice plays a strategic role in the Indonesian economy as it is the basic need of most people, and its fluctuations have a significant impact on purchasing power and economic stability. Various factors influence changes in rice prices, such as production volume, climate conditions, and the possibility of price manipulation by certain parties. In this analysis, the Least Square Approximation method was chosen because it is able to capture trend patterns based on historical data from 2015-2022 obtained from the Central Statistics Agency (BPS), thus helping to project future prices. The prediction results show that rice prices in the period tend to be stable in the range of IDR 8,900 to IDR 9,800 per kilogram. The accuracy of the model was evaluated using Mean Absolute Percentage Error (MAPE), which resulted in an error of 2.59%, indicating that the method is effective and reliable enough to provide accurate rice price predictions.
Pengaruh Latihan Pernapasan Pursed Lips Terhadap Saturasi Oksigen pada Pasien dengan Gangguan Pernapasan di Ruang IGD RSUD Kota Mataram Prasati, Supriana; Putra, Ageng Abdi; Suhartiningsih, Suhartiningsih; Wijaya, Alwan; Mentari, Ika Nurfajri; Ustiawaty, Jumari
JSN : Jurnal Sains Natural Vol. 3 No. 2 (2025): Agustus
Publisher : Puslitbang Sekawan Institute Nusa Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35746/jsn.v3i2.668

Abstract

Respiratory disorder has very high prevalence in Mataram District hospital in January to May 2018. They are 326 cases of patients with respiratory disorder. One of treatments for patiens with respiratory disorder is pursed lips breathing (PLB). This research is aimed at determining the effect of training of pursed lips breathing on oxygen saturation of patients with respiratory disorder in emergency room of Mataram District Hospital. This research is pre-exsperimental study with two group pre-test post-test design. The samples were selected through non-probality accidental sampling. The data were analyzed with paired-test using SPSS 16. The data were collected through observation and pulse Oxymetry. Based of study found ther is effect of pursed lips breathing on oxygen saturation in patients with respiratory disorder in Mataram District hospital. It is inferred that there is effect of providing pursed lips breathing on oxygen saturation of patients with respiratory disorder in emergency room of Mataram District Hospitsl. It is recommended that training of pursed lips breathing be used to improve life quality of patients with respiratory disorder.
Analysis of Consumer Price Index Changes at Mataram City in 2023-2024 Maulani, Septia Hasna; Robbaniyyah, Nuzla Af'idatur
JSN : Jurnal Sains Natural Vol. 3 No. 2 (2025): Agustus
Publisher : Puslitbang Sekawan Institute Nusa Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35746/jsn.v3i2.687

Abstract

This research aims to analyze the development of the Consumer Price Index (CPI) in Mataram City from January to September in 2023 and 2024. In addition, this study also aims to identify and analyze certain patterns or trends in the CPI comparison between the two years. This research also evaluates and explains the implications of CPI differences for the local economy. These include the impact on people's purchasing power, consumption patterns, and the affected economic sectors. The analytical methods used include descriptive and quantitative analysis by utilizing secondary data. The results show that there is a significant difference in the CPI between 2023 and 2024. The average CPI in January to September 2023 is 113.69, which is higher than the same period in 2024 which has an average of 106.03. This difference indicates that the cost of living in 2023 is higher, while the decrease in CPI in 2024 has the potential to increase people's purchasing power. These findings have important implications for the local economy in Mataram City, including changes in consumption patterns and impacts on various economic sectors.
Optimasi Penjualan Warung Makan Solo Menggunakan Progam Linier dengan Metode Simpleks Lestari, Natasya Dyahayu; Hamdi, Ahmadil; Saofitri, Saofitri; Alfian, Muhammad Rijal; Maharani, Andika Ellena Saufika Hakim
JSN : Jurnal Sains Natural Vol. 3 No. 2 (2025): Agustus
Publisher : Puslitbang Sekawan Institute Nusa Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35746/jsn.v3i2.710

Abstract

Food stalls are one form of culinary business that faces challenges in managing limited raw materials to maximize profits. This study uses a linear programming method with a Simplex approach to optimize the profits of Solo food stalls that sell three main menus: fried rice, fried noodles, and meatballs. The optimization model is designed by considering the limitations of raw materials such as vegetables, eggs, chicken, oil, sauce, and spices, as well as the selling price and cost of raw materials per portion. In this case, we use manual and software analysis, namely by using POM-QM for Windows. The results of manual and software analysis show the same results, namely by producing 25 additional packages of fried rice and 33.33 packages of meatballs. Because the requested results use integer numbers, we perform branch and bound analysis to produce the maximum value with all values ????of x1, x2, x3 are decimal numbers. The optimization results show that the Simplex method can determine the combination of the number of portions of each menu optimally to achieve maximum profit without violating resource constraints. Thus, this article was created so that we can determine the maximum profit with the availability of existing raw materials and with the capacity that traders have to make it easier for traders to manage.
Simulasi SIR Kecanduan Media Sosial Mahasiswa FMIPA UNRAM dengan Metode Euler dan Heun Lestari, Natasya Dyahayu; Arimanda, Abi Rizka Yulia; Nisa, Gina Agisna
JSN : Jurnal Sains Natural Vol. 3 No. 2 (2025): Agustus
Publisher : Puslitbang Sekawan Institute Nusa Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35746/jsn.v3i2.716

Abstract

Social media has become an important part of daily life, especially among university students. The ease of access to information and communication through digital platforms brings both positive and negative impacts, one of which is the increasing addiction to social media. This study aims to analyze social media addiction among students using the SIR (Susceptible-Infected-Recovered) model. This model categorizes the population into three groups: individuals susceptible to addiction ( ), individuals experiencing addiction ( ), and individuals who have recovered from addiction ( ). The model is solved using numerical methods, namely the Euler method and the Heun method, which are applied in simulations using MATLAB software. The simulation results show that social media addiction spreads within a population following a distinctive pattern, where the number of addicted individuals increases before eventually declining due to increased awareness and specific interventions. Additionally, the Heun method provides more accurate solutions compared to the Euler method, highlighting the importance of precise numerical approaches in modeling addiction dynamics. These findings offer insights into how social media addiction develops and how prevention and recovery strategies can be effectively implemented among students.
Profil Jumlah Leukosit Berdasarkan Nilai Titer Widal pada Kasus Demam Tifoid Anak Nurmansyah, Dian; Nisa, Shalehatun; Puspawati, Puspawati; Fayumi, Syihab; Mudzakkir, Musyirah; Sasmitha, Maya Herliana
JSN : Jurnal Sains Natural Vol. 3 No. 2 (2025): Agustus
Publisher : Puslitbang Sekawan Institute Nusa Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35746/jsn.v3i2.845

Abstract

Typhoid fever, caused by Salmonella typhi infection, remains a public health issue in developing countries, including Indonesia, with the highest prevalence among children aged 5–14 years. This study aimed to analyze the leukocyte profile of pediatric typhoid fever patients at Graha Medika Clinic, Banjar Regency. An observational analytic design with a cross-sectional approach was used. The sample included 526 pediatric patients with Widal titers ?1/320 who underwent complete blood tests. Results revealed that 71.3% of patients had normal leukocyte counts, while 22.4% showed leukocytosis and 6.3% had leukopenia. Simple linear regression analysis indicated no significant relationship between Widal titers and leukocyte levels (R² = 0.002). These findings suggest that most pediatric typhoid fever cases present with normal leukocyte counts. Among abnormal cases, leukocytosis was more common, though leukopenia was also observed.
Tabel Kehidupan (Life Table) dalam Matematika Aktuaria: Tinjauan Sistematis terhadap Metodologi, Aplikasi, dan Perkembangan Terkini Fauzi, Andri Azmul; Ridwan, Lalu Muhammad; Raming, Indriasri; Tumilaar, Rinancy
JSN : Jurnal Sains Natural Vol. 3 No. 2 (2025): Agustus
Publisher : Puslitbang Sekawan Institute Nusa Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35746/jsn.v3i2.847

Abstract

Life tables are a fundamental tool in actuarial mathematics, providing a systematic framework for mortality analysis and survival probability calculations. This study aims to provide a comprehensive overview of life table construction methodology, its applications in the insurance and pension industries, and recent developments in this field. Using a systematic literature review approach, this study analyzes 20 relevant publications from 2014–2024, with a particular focus on the 10 most recent publications from the past 5 years. The results show that life tables have undergone significant evolution in their construction methodology, particularly with the integration of machine learning and big data analysis techniques. Applications of life tables have also expanded, encompassing not only life insurance premium calculations and actuarial valuations, but also longevity risk analysis, retirement planning, and public health policy. Recent developments indicate an increasing trend in the use of stochastic models, dynamic mortality projections, and adaptation to global demographic changes. This study contributes to a holistic understanding of the role of life tables in modern actuarial mathematics and provides insights into future development directions.

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