Journal of Science and Application Technology (JSAT - Institut Teknologi Sumatera)
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Utilization of Avocado Leaves (Persea americana Mill) Ethanol Extract in Acne Spot Gel Formulation
Get PDFAvocado leaves (Persea americana Mill) are classified as a type of herbal plant that has many benefits and can be used as traditional medicine. The components in avocado leaves that have antibacterial properties are flavonoids, saponins, and tannins. To increase public interest in utilizing avocado leaves, the development of a formulation in the form of acne spot gel from avocado leaf ethanol extract can be undertaken. The base used in this study is carbopol 934, the base that commonly used in gel production. The purpose of this study is to determine the effect of variations in the concentration of avocado leaf ethanol extract on the physical properties of acne spot gel. The extract was obtained by macerated 50.06 grams of avocado leaves (yield 25.03%). The formulation was produced in gel form with four formulas that had variations in the concentration of ethanol extract, those are formula 0 (0%), formula 1 (5%), formula 2 (10%), and formula 3 (15%). The acne spot gel was subjected to physical property tests including organoleptic, pH, spreadability, and adhesion. All tested formulas met the quality requirements of the acne spot gel formulation. The evaluation data were analyzed using One-Way ANOVA to determine significant differences. Based on the evaluation results, the variation in ethanol extract concentration had a significant effect (p < 0.05) on adhesion, where higher concentrations of ethanol extract could increase the adhesion of the formulation
Laboratory Scale Brachionus plicatilis Culture Technique with Natural Feeds Nannochloropsis oculata and Tetraselmis chuii in Marine Aquaculture Center Lampung, Teluk Pandan, Pesawaran: Laboratory Scale Brachionus plicatilis Culture Technique with Natural Feeds Nannochloropsis oculata and Tetraselmis chuii in Marine Aquaculture Center Lampung, Teluk Pandan, Pesawaran
No full textA very influential factor in marine fish production is the provision of efficient and appropriate feed and feed management for marine fish larvae. Natural feed has content that can meet the nutritional needs of marine fish larvae. One of the natural feeds that can be utilized in marine fish farming is rotifer (Brachionus plicatilis). This study aims to determine the laboratory scale culture technique of Brachionus plicatilis, determine the growth rate of Brachionus plicatilis with different phytoplankton feeding, determine the optimal phytoplankton density for Brachionus plicatilis. Data collection techniques in this study used 2 kinds of data, namely primary data and secondary data. Primary data comes from observation, interviews, and active participation. While secondary data comes from literature studies, namely books, journals, annual reports, theses, and so on. Laboratory-scale Brachionus plicatilis culture starts from sterilization of tools and materials, planting Brachionus plicatilis seedlings, feeding, and calculating the population of Brachionus plicatilis. Brachionus plicatilis fed with Nannochloropsis oculata at a density of 100,000 cells/ml entered the exponential phase on day 4 with a total number of individuals of 72 ind/ml, while Brachionus plicatilis fed with Tetraselmis chuii at a density of 3000 cells/ml entered the exponential phase on day 5 with a total number of individuals of 100 ind/ml
Aplikasi Budidaya Ikan Dalam Ember Dengan Akuaponik Di Desa Gedung Harapan, Lampung Selatan
No full textAs human population grows, the demand for food production will increase and consequently causing greater stress to resources such as land and water. Aquaponic is a technology integrating hydroponic and aquaculture to optimize nutrient cycling. The problem faced by the residents of Gedung Harapan Village is that the community still has not utilized the potential for optimal use of house yards for aquaculture and agriculture. We introduce aquaponics technology to realize independence in fulfilling family nutrition in the Gedung Harapan Village, South Lampung. This activity resulted in an increase in participants' understanding and experience of fish farming in buckets (budikdamber) with aquaponics. It was advisable to encourage more people to implemented budikdamber to fulfill family nutrition
Pelatihan Pengolahan dan Analisa Data Statistik Untuk Meningkatkan Kompetensi Guru SMPN di Kalianda, Lampung Selatan
No full textSalah satu wujud pengembangan diri seorang guru adalah dengan melakukan dan menulis laporan penelitian. Penelitian dan penulisan laporan hasil penelitian terkait kinerja pembelajaran seorang guru merupakan salah satu upaya evaluasi (refleksi) terhadap kinerja seorang guru di dalam kelas. Evaluasi ini dilakukan dengan melaksanakan Penelitian Tindakan Kelas (PTK). Permasalahan yang terjadi pada PTK adalah kurangnya kompetensi guru dalam melakukan pengolahan data, menggunakan tools, dan menerapkan model-model statistika yang cocok untuk kasus-kasus yang terjadi di kelas. Pada jurnal ini membahas peningkatan kompetensi guru-guru SMPN melalui pelatihan olah data dan analisis data statistik menggunakan JASP. Tingkat pemahaman dan kompetensi guru diukur menggunakan kuesioner yang diberikan pada sebelum dan setelah melakukan pelatihan. Pelatihan ini memberikan perubahan tingkat pemahaman dan kompetensi yang signifikan berdasarkan bidang kompetensi yang ditanyakan. Hal ini dapat dilihat dari gap responden yang diperoleh saat sebelum pelatihan dan setelah pelatihan dilakukan
Site Selection Analysis for Grouper Culture in Floating Cage Using GIS-Based Weighted Linear Combination Analysis in Kulisusu Bay
Get PDFLand suitability evaluation is a crucial component that supports the sustainable development of aquaculture. One economically valuable commodity in this field is the grouper fish. Kulisusu Bay, located in North Buton Regency, is an area with potential for grouper culture in floating cages. The objective of this research is to analyze the suitability of the land in Kulisusu Bay for floating cage aquaculture of grouper. The study begins by identifying key parameters that directly affect the success of aquaculture activities. These parameters include primary and secondary data that are used to build spatial data. Subsequently, a spatial model is constructed based on this data, resulting in a spatial database. Each parameter is then weighted and scored. The final step involves spatial overlay modeling, where the weighted and scored results are used to generate a land suitability map. The research results show that a significant portion of 2,253 hectares is highly suitable, with an additional 810 hectares being suitable for the activity. These areas are primarily concentrated in the central region of Teluk Kulisusu. Based on these findings, it can be concluded that the waters of Teluk Kulisusu have great potential for the development of grouper culture in floating cages. However, the support of various stakeholders, including the government, is necessary to ensure that this aquaculture activity is sustainable by implementing environmentally friendly culture practices
OPTIMIZATION OF FUNCTION OF TWO VARIABLES, A NUMERICAL APPROACH
Get PDFTeaching development in maximum value of a function of two variables is reported in this paper. Based on an experience in teaching numerical method, difficulty in determining step size of steepest ascent gives an idea to covert the function into one variable, so that we can solve numerically by standar method for that function, such as Newton method. Here, we present some examples to support that development
STUDY RE-ANALYSIS OF HIGH WAVE DEFORMATION IN RE-DESIGN COASTAL REVETMENT PROTECTION OF RAJABASA BEACH KALIANDA
Get PDFThe eruption of Mount Krakatau in 2018, along with high waves, has impacted the coastal conditions of Kalianda Beach. The parameters for planning the revetment include significant wave height, highest high water level (HHWL), refraction and shoaling coefficients, wave set-up, and SLR. Wave data processing was conducted using the FT Type I. The extreme wave 50-year period has a height (Hr) of 2.22 m and a period (Tr) of 14.67 s. The wave transformation coefficients for refraction and shoaling, which are 0.74 and 1.44 respectively, lead to a deformation wave height of 2.19 m at a depth of 5 m. Admiralty tide analysis yielded a tidal range element at MSL of 0.94 m, which serves as the datum for elevation point 0. The HHWL from MSL is 0.73 m, wave set-up is 0.58 m due to breaking waves at 3.43 m, and SLR is 0.16 m, leading to a DWL of 1.46 m. The wave run-up varies according to the type of revetment, boulder type elevations id 4.60 m, tetrapod type is 3.80 m, and dolos type is 4.40 m. Differences elevation are attributed to different wave run-up every type of revetment material, run-up of the type material boulder is 2.83 m, run-up of tetrapod is 2.08 m, and dolos is 2.67 m
SEGMENTATION OF PARCEL BOUNDARY INDICATIONS IN VERY HIGH-RESOLUTION ORTHOPHOTO MOSAICS FOR CONTROL POINT IDENTIFICATION
Get PDFSeveral Land Parcel Geometry issues in Indonesia's Land Registration Process, such as parcel overlapping, gaps between parcels, and incorrect parcel shapes and sizes, are currently being addressed through a block adjustment approach. One crucial aspect of the block adjustment process is determining control points that tie the parcel geometry to the land coordinate system. Detailed Observations and measurements of parcel points in the field and aerial photographs established these control or tie points. Rectifying land parcels requires many control points, requiring substantial time and effort. The automation phase is critical to expedite the control point identification process. This research uses artificial intelligence techniques to identify control points in very high-resolution orthophoto mosaics. The method employed for control point identification involves the Segment Anything Model (SAM) algorithm to segment parcel boundary indications accurately. Enhance the quality of segmentation results conducted by fine-tuning, followed by centerline extraction and refinement of the extracted data. Based on the segmentation, a SAM model capable of accurately segmenting building objects is attained, After the centerline extraction process and modifications to the existing geometric operations within the GIS Tool, at the edges of buildings, fences, and walls derived points. These points can serve as control point indications in the block adjustment process
Analisis Jumlah Kecelakaan Lalu Lintas, Korban, dan kerugian di Provinsi Lampung Tahun 2021 Dengan Metode K-Means Cluster
Get PDFAbstract: Provinsi Lampung is facing a serious challenge regarding the high rate of traffic accidents, triggered by the increasing number of vehicles and inadequate infrastructure. Low awareness of traffic regulations also serves as a major cause of accidents. This research employs the Cluster Analysis method within the Geographic Information System (GIS) to categorize traffic accident data in Lampung Province for the year 2021. The data encompasses the number of accidents, fatalities, serious injuries, minor injuries, and financial losses across 14 districts/cities. The cluster analysis results identify two main groups with distinct characteristics. The first cluster exhibits a low accident rate, while the second cluster shows a high accident rate, contributing significantly to the total number of accidents, fatalities, serious injuries, minor injuries, and financial losses. Recommendations for interventions are tailored to the characteristics of each cluster, emphasizing either fatal injury prevention or road infrastructure improvements. The findings of this research provide a foundation for designing more effective strategies to reduce accident risks and enhance traffic safety in Lampung Province
Keywords: K-means, Accidents, Lampung Provinc
Pengoptimalan Masalah Nonlinier dalam Meminimumkan Biaya Produksi Menggunakan Separable Programming dan Algoritma Genetika
No full textThis research aims to form a nonlinear model of the objective function in the case of minimizing production costs and the number of products that must be produced by Lanting Bumbu An-Nisa. The application of the separable programming method is carried out by transforming the nonlinear objective function and constraints to produce a linear objective function and constraints which are then solved by applying the genetic algorithm method. The application of this method produces a solution that producers must produce 250 packages of onion flavored lanting, 750 packages of cheese flavored lanting, 500 packages of sweet and spicy lanting and 500 packages of corn flavored lanting with a production cost of IDR 12,706,037.29 . The nonlinear model formed in this problem was also solved directly using the genetic algorithm method which resulted in the solution that the total production of onion flavored lanting was 533 packages, 507 packages of cheese flavored lanting, 505 packages of sweet and spicy lanting and 455 packages of corn flavored lanting at a cost of the production that must be spent is IDR 11,213,943.55. The application of these two methods results in a difference in production costs of IDR 1,492,093.74. Based on these results, it shows that solving the nonlinear model directly using a genetic algorithm results in production costs that are 11.74% lower than the costs solved using separable programming