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INDONESIA
International Journal of Natural Science and Engineering
Published by Universitas Pendidikan Ganesha
ISSN : 26151383     EISSN : 25496395     DOI : -
Core Subject : Engineering,
Engineering
International Journal of Natural Sciences and Engineering (IJNSE) is an independent, quarterly basis online & print version, open access, peer reviewed, non-profit journal that publishes original research, short communications, review articles or essays, and book reviews relevant to Natural Sciences and Engineering. IJNSE is published by the Universitas Pendidikan Ganesha (Undiksha), Indonesia.
Arjuna Subject : -
Articles 216 Documents
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Enhanced Distillation Efficiency for Formic Acid Production: Simulation and Optimization with Aspen HYSYS Fauzia, Farah; Sari, Dessy Agustina
International Journal of Natural Science and Engineering Vol. 8 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v8i1.78935

Abstract

This study investigates the simulation and optimization of the distillation column AT-660 at PT Chemical Happy, focusing on improving the efficiency and purity of formic acid production using Aspen HYSYS V10. Data collection involved operational conditions, component compositions, and flow rates from the plant, which were used to develop a detailed process model. The simulation assessed current performance and identified discrepancies between simulated results and actual data. Optimization runs identified key parameters, such as reflux ratio, feed location, and column pressure, that significantly impact separation efficiency and product purity. The results demonstrated enhanced performance of the distillation column, with increased formic acid purity and improved operational efficiency. The study highlights the practical applications of simulation software in industrial settings, providing actionable insights for process improvement and contributing to the development of more efficient and sustainable chemical engineering practices.
Redesign of the User Interface of the School Examination Website of SMK Nusa Dua Using the Design Sprint Method Giri Wijaya, Gede Wesbyana; A.A. Istri Ita Paramitha; Eka Grana Aristyana Dewi
International Journal of Natural Science and Engineering Vol. 8 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v8i1.83081

Abstract

The Online Exam Website has encountered issues related to its user interface and lack of mobile responsiveness. This study aims to analyze and enhance the User Interface (UI) design and improve the User Experience (UX) to better meet current user needs. The research employed a mixed-methods approach, collecting qualitative data through interviews and observations, and quantitative data through a questionnaire based on the System Usability Scale (SUS). Subjects were selected using the Focus Group Discussion (FGD) technique, involving 6–10 active users. The study applied the Design Sprint method, focusing on a human-centered approach to develop solutions based on user needs. Data were analyzed using descriptive qualitative and quantitative techniques. The findings indicate a significant improvement in UI and UX aspects based on user feedback on the newly developed prototype. The results imply that the application of the Design Sprint method is effective in optimizing website design according to actual user requirements.
Determination of Total Flavonoid, Iron (Fe) and Chlorophyll Content of Brazilian Spinach Extract (Althernanthera sisso) based on Different Types of Extraction Solvents Heri Setyo Bekti; Ratih, Gusti Ayu Made
International Journal of Natural Science and Engineering Vol. 8 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v8i1.84661

Abstract

Brazilian spinach (Alternanthera sissoo) is known to contain various bioactive compounds such as flavonoids, iron (Fe), and chlorophyll that have the potential to be utilized in the health and food fields. However, the levels of these compounds can vary depending on the type of solvent used in the extraction process, so research is needed to determine the most effective solvent. Brazilian spinach (Alternanthera sissoo) is a vegetable species originally from Brazil that has begun to be cultivated in Indonesia. It contains secondary metabolites such as flavonoids, alkaloids, steroids, and saponins. Additionally, this plant has relatively high levels of iron and chlorophyll compared to other vegetables, with chlorophyll playing an important role in treating anemia and assisting the body in utilizing iron. This study aims to analyze the most effective solvent for extracting total flavonoids, iron (Fe), and chlorophyll from Brazilian spinach, supporting its potential development as a food supplement ingredient. This research employed a quasi-experimental design using a completely randomized design (CRD). The samples were Brazilian spinach extracted with 70% ethanol, ethyl acetate, and methanol. The concentrations of the compounds were determined using UV-Vis spectrophotometry and Atomic Absorption Spectrophotometry (AAS). The results showed that methanol extraction produced the highest extract yield (10.87%), the highest iron content (10.205 mg/kg), chlorophyll content of 13,586.571 mg/kg, and total flavonoids of 900.128 mg/100gQE. Based on these findings, methanol was identified as the most effective solvent for extracting bioactive compounds from Brazilian spinach. These results imply that Brazilian spinach has strong potential to be developed as a natural source for food supplements.
Microlearning-Based Learning Video on the Content of Grade IV Elementary School Science Lesson Pande Made Meiza Putra; Adrianus I Wayan Ilia Yuda Sukmana; I Komang Sudarma
International Journal of Natural Science and Engineering Vol. 8 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v8i1.85394

Abstract

This research problem focuses on the limited use of technology-based learning media in schools, which affects students' low understanding of IPAS material. This research aims to create a microlearning-based learning video that is valid, practical, and effective in increasing the motivation and learning outcomes of grade IV elementary school students. This type of research is development research (R&D) with ADDIE design. The research subjects involved 31 fourth grade students and 3 experts for validation. The data collection methods used were questionnaires and tests. While the instruments used were questionnaire sheets and multiple choice tests. The data analysis process in this study involved various techniques, including qualitative, quantitative, and inferential descriptive analysis. Qualitative analysis will come from the results of questionnaires, interviews, input and criticism by experts. Meanwhile, the quantitative analysis was obtained from the calculation of the validity, practicality, and effectiveness tests of the media. Finally, hypothesis formulation and conclusions were drawn through inferential descriptive analysis. The results showed that there was a significant difference between after and before being taught using microlearning-based video media on IPAS learning content. So it can be concluded that the media developed is valid, practical, and effective to use. The results of this study are expected to be used as a reference or reference if interested in researching the use of learning media, especially microlearning-based learning videos in schools and among the community.
The Effect of Graphene Oxide Biomass as Filtration Loss Control Agent of Water-Based Mud Fluid Mursyidah; Nur Hadziqoh; Binti Mod Zaid, Hasnah; Rahmayeni, Foni
International Journal of Natural Science and Engineering Vol. 7 No. 2 (2023): Juli
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v7i2.48181

Abstract

Water-based drilling fluids are complex chemical systems that are essential for water drilling excavation. Biomass of Graphene Oxide (GO) is a submicrometer-thick material with unique and specific properties. GO can be entirely impermeable to liquids, vapors, and gases. It has water dispersibility and a huge specific surface area that is the potential material suitable for filtration loss control agents of water-based mud fluid. This study aims to analyze the effectiveness of Oil Palm Shell Graphene Oxide Biomass as an additif material to filtration control in water-based mud fluid. Making  GO biomass sample starts from biomass Oil Palm Shell into graphite biomass, then the graphite biomass was sinthesized using an ultrasound-assisted liquid Phase Exfoliation (LPE) method to obtain thin GO biomass. Graphite biomass and GO biomass were characterized using FTIR, UV-Vis Spectroscopy and SEM-EDX. Drilling fluid samples with graphite biomass and GO biomass were prepared by adding 0.5 gr Graphite biomass and GO biomass into the based fluid (water-based bentonite fluid), The Filtration loss and the mud cake thickness of all the samples are measured and compared. Based on the measurement results, GO biomass additive is very effective in reducing fluid loss compare to graphite biomass additif. The volume of fluid lost was decreases from 13.9 ml to 10.8 ml compare to graphite biomass which was only able to decrease it to 12,3 ml.
Implementation of the Simple Multi-Attribute Rating Technique (SMART) for Decision Making on the Selection of the Best Prospective Employee Mihuandayani; Sanggilalung, Rida P.; Mamuaya, Supit
International Journal of Natural Science and Engineering Vol. 7 No. 2 (2023): Juli
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v7i2.54994

Abstract

Human resource management is the important part of the company, it can affect the success of the company. In the process of selecting new employees at the company, several problems often occur such as ineffective time, the company still sorts out the prospective employee files conventionally and then compared them with other files for assessment, so it took a long time because there are many applicants who apply with different quality. In addition, there can be subjectivity to the data from the assessment results of prospective employees for certain reasons such as having emotional closeness with stakeholders. It needed a system to handle these problems such as Decision Support System (DSS). This study proposed the Simple Multi-Attribute Rating Technique (SMART) approach in evaluating prospective employees. There are five criteria used in this study, namely written tests, interviews, education, award certificates, and work experience. This decision support system can help stakeholders, especially the head of the company's branches, to determine the best candidate for employees with accurate and objective results. In this research, a comparison was also made between the SMART method and a manual system, which obtained an accuracy rate of 91.33% with the proposed method. The SMART method can be an effective and reliable option for selecting job candidates, as it can minimize errors and improve recruitment efficiency, thereby positively impacting company productivity and employee performance.
The Relationship of Facial Skin Personal Hygiene to The Onset of Acne (Acne Vulgaris) in Adolescent Boys Damayanti, Indah Sri; Minerva, Prima
International Journal of Natural Science and Engineering Vol. 7 No. 2 (2023): Juli
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v7i2.62085

Abstract

Acne is a common problem that often occurs at a young age and is influenced by factors such as climate, hygiene, cosmetic use, age, race, diet, gender, and genetics. This research was conducted at SMAN 1 Pangkalan Koto involving 155 male students. Of these, 111 students (71%) experienced acne problems. The purpose of the study was to assess the relationship between facial skin hygiene (Personal Hygiene) with the incidence of acne vulgaris in adolescent boys at SMAN 1 Pangkalan Koto Baru. The research method used is correlation analytics with a cross-sectional design. The independent variable is personal hygiene, while the dependent variable is the incidence of acne vulgaris. The study sample consisted of male students who had acne vulgaris and met the research criteria. Primary and secondary data were collected through questionnaires. Data analysis was carried out by univariate and bivariate analysis methods. The results showed that around 51.6% of adolescent boys at SMAN 1 Pangkalan Koto Baru experienced moderate acne vulgaris. Their level of personal hygiene was also categorized as moderate, with 69.4% of respondents having a similar level of hygiene. The results of the analysis showed a significant relationship between facial skin hygiene and the incidence of acne vulgaris in adolescent boys at SMAN 1 Pangkalan Koto (Sig. Pearson Chi-Square: 0.021 < 0.05).
Leucocyte Value as a Signs of Microvascular Inflammation in Type 2 Diabetes Mellitus Patients Amelia, Ria; Aulia, Fadila; Luhulima, Danny
International Journal of Natural Science and Engineering Vol. 7 No. 2 (2023): Juli
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v7i2.62440

Abstract

Problems in the pathogenesis of Type 2 Diabetes Mellitus (T2DM) to complications are often overlooked, and routine blood tests are rarely performed in individuals with T2DM. Inflammation is an important early sign for detecting complications. One of the factors that can be used as an indicator of inflammation is the value of leukocytes. The purpose of this study was to assess leukocyte counts in patients with T2DM as a sign of inflammation in T2DM patients. This study used a cross-sectional approach method, with data analyzed descriptively and correlative using SPSS software. The subjects of the study involved residents assisted by the Kota Baru and Kalibaru Health Centers who suffered from DMT2 in the period from January to February 2019. The results of the Pearson test showed a value of p = 0.49, which indicated that there was no significant relationship between leucocytosis and blood glucose levels. The conclusion of this study is that the high number of leukocytes in T2DM patients is thought not to be caused by high blood glucose levels, but may be influenced by other factors related to the development of complications of T2DM disease. This research has important implications in understanding the pathogenesis and prevention of complications of T2DM.
Gamma Spectroscopy Prototype Design to Identify Radioactive Elements Djokorayono, Rony; Sulaksono, Santiko Tri; Seno, Haryo; Utomo; Saptowati, Hasriyasti; Santoso, Puji; Hermana, Ferly; Wiranto BS; Sumaryanto, Agus
International Journal of Natural Science and Engineering Vol. 7 No. 2 (2023): Juli
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v7i2.65908

Abstract

The identification system for radioactive elements used the single-channel analyzer (SCA) gamma spectroscopy method. However, the process of producing the spectrum was still quite long because it had to go through the process manually by scanning its energy; one of the other radioactive elements is gamma spectroscopy. This research aims to develop a prototype gamma spectroscopy that allows the identification of radioactive elements. In this study, researchers used an experimental method by designing a gamma spectroscopy prototype consisting of a 2.5 cm diameter NaI(TL) detector equipped with a photomultiplier, high voltage module, preamp module, pulse shaping module, sample hold module, and Atmega microcontroller with an LCD display resolution of 128 × 64. The results of testing this prototype were carried out with various radioactive samples. Researchers managed to identify radioactive elements by measuring electrical pulses produced by NaI(TL) detectors. Background counting, which is the result of enumeration from detectors without radioactive material, was identified and eliminated. The distribution pattern has a random nature, the energy resolution of the spectroscopy consists of 1024 channels, and the counting time can be set as needed via the reset button. The main finding of the study was that the gamma spectroscopy prototype was able to provide a clear picture of the energy spectrum of nuclear radiation, allowing good identification of radioactive elements. The results of this study have important implications in the field of identification of radioactive elements and can be used in a variety of scientific and industrial applications involving nuclear radiation.
Groundwater Quality Analysis Based on Physical Properties of The Gunungtiga and Surrounding Areas Hilman, Zaki; Widiatama, Angga Jati; Awfa, Dion; Alfarishi, Bilal; Prayogo, Wisnu; Depri
International Journal of Natural Science and Engineering Vol. 7 No. 2 (2023): Juli
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v7i2.67866

Abstract

Gunungtiga area has never been studied for the quality of groundwater, and residents have also complained about the quality of groundwater, these became the basis for selecting the research location. This study aims to analyze groundwater quality in the Gunungtiga Region, Lampung Province. Quantitative approached was used for this research, it was carried out by mapping the groundwater level to estimate the recharge area and collecting data on parameters of the physical properties of groundwater, including color, taste, odor, temperature, pH, TDS, and EC.  The physical properties approach was selected because it is relatively cheap and easy to observe, the data collection can also be done in situ. The physical property parameter data is then checked based on the Republic of Indonesia Minister of Health Regulation No. 492 of 2010. The observations at 14 points showed that the groundwater level in the research area is relatively shallow towards the west or in the direction with higher topography, so it can be interpreted as a recharge area, and it flowed towards the east area which has lower topography. The physical properties of the groundwater had no taste, odor, or color. The EC value ranges from 188.07 to 1066.82 µs/cm, including fresh water, the pH ranges from 5.41 to 7.5, the temperature ranges from 27.2 to 29.7 0C, and the TDS value ranges from 94. 04-542.91 mg/l. Of the 14 observation points, only 1 location met the quality standards, namely 22/DP/02. Treatment is required before groundwater can be used, such as filtering.

Page 19 of 22 | Total Record : 216

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