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JUSTER: Jurnal Sains dan Terapan
Published by Yayasan Jompa Research and Development
ISSN : 28097661     EISSN : 28097750     DOI : https://doi.org/10.55784/juster
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology Chemistry Energy Immunology & microbiology Physics
JUSTER: Jurnal Sains dan Terapan menerbitkan hasil penelitian atau hasil karya ilmiah lainnya di bidang sains dan terapan. Adapun scope terbitan JUSTER meliputi Matematika dan IPA (Fisika, Kimia, Biologi), dan aplikasi sains bidang Matematika dan IPA. Terbit tiap bulan Januari, Mei dan Desember
Arjuna Subject : Umum - Umum
Articles 141 Documents
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Pemodelan Proses Assembly Menggunakan Bahasa System Dynamics Windyaningrum, Theresia Liris; Murdapa, Petrus Setya
JUSTER : Jurnal Sains dan Terapan Vol. 2 No. 3 (2023): JUSTER: Jurnal Sains dan Terapan
Publisher : Jompa Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57218/juster.v2i3.925

Abstract

Proses assembly (perakitan) umum digunakan dalam berbagai sistem keindustriaan manufaktur. Selama ini, pemodel menggunakan teknik matematis, ataupun simulasi diskrit untuk memenuhi keperluan analisis kinerja sistem tersebut. Paper ini mencoba memberikan bukti dan gambaran bahwa metode system dynamics yang selama ini dikenal sebagai sarana pemodelan simulasi kontinyu dapat pula digunakan untuk pemodelan sistem lintasan assembly yang adalah suatu sistem diskrit. Sistem yang dikaji sebagai bahasan dalam paper ini adalah sistem proses assembly, di mana ada proses-proses pabrikasi komponen-komponen assembly yang diperlukan yang mendahului proses assembly tersebut. Dari dua pengujian yang dilakukan terhadap hasil yang diberikan oleh model yang tersusun dapat disimpulkan bahwa proses assembly dapat dimodelkan dengan bahasa system dynamics.
Pengembangan Tracking Pole Sebagai Tongkat dan Alat Penjepit Sampah bagi Pendaki Gunung Danar Husain Hidayat; Vinsensius Widdy Tri Prasetyo; Lorensius Anang Setiyo Waloyo
JUSTER : Jurnal Sains dan Terapan Vol. 2 No. 3 (2023): JUSTER: Jurnal Sains dan Terapan
Publisher : Jompa Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57218/juster.v2i3.928

Abstract

The increase in the number of mountain climbers has an impact on increasing the volume of rubbish along the climbing route which results in damage to the natural scenery on the climbing route, pollution of water sources, and changes in eating behavior patterns in animals. Trash handling on climbing routes has been carried out by providing sanctions for climbers who do not bring rubbish down to several base camps. The process of picking up climbers' rubbish experienced several obstacles, including: picking up dirty rubbish with unhygienic hands, limited water to wash their hands after picking up rubbish, difficulty for climbers picking up rubbish while wearing large bags, and rubbish on the edge of cliffs which endangered climbers. The aim of this research is to design the development of a tracking pole as a trash clamp tool for mountain climbers. The product development design for this research uses product development theory according to Ulrich which is divided into several phases, namely: planning phase, concept development phase, system level design phase, detailed design phase, testing and improvement phase, and product launch phase. This research is limited to the testing phase. The designed tracking pole is a tool that is simple and easy to use, as a stick and also a tool for collecting rubbish when climbers are climbing, a comfortable tool. The designed tracking pole was well received by climbers. This is shown in the panelists' responses after using the tracking pole during technical testing of the tool.
Evaluasi Kinerja Bus Trans Jogja Jalur 15 Qhorib, Muhammad Nur; Ircham, Ircham; Anggorowati, Veronica Diana Anis
JUSTER : Jurnal Sains dan Terapan Vol. 2 No. 3 (2023): JUSTER: Jurnal Sains dan Terapan
Publisher : Jompa Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57218/juster.v2i3.934

Abstract

Daerah Istimewa Yogyakarta (DIY) merupakan daerah yang dikenal sebagai Kota Pendidikan, Wisata dan Kota Budaya, kini telah berubah menjadi daerah yang memiliki kepadatan penduduk yang cukup tinggi sehingga penulis melakukan penelitian yang bertujuan untuk mengetahui faktor apa saja yang perlu ditingkatkan dan faktor apa saja yang mempengaruhi kinerja bus Trans Jogja. Data yang digunakan adalah data primer yang di dapatkan dari survey langsung di lapangan meliputi, jumlah penumpang, load factor, waktu antara, dan kecepatan rata-rata. Pengumpulan data sekunder berupa peta wilayah, jumlah armada, dan rute bus Trans Jogja. Pengumpulan data dilakukan selama 3 hari pada senin 25 September, sabtu 30 September, dan minggu 01 Oktober. Hasil analisis kemudian di bandingkan dengan ketentuan surat keputasan Direktorat Jendral Perhubungan. Hasil analisis kinerja bus Trans Jogja bedasarkan perhitungan hasil survey didapatkan waktu sirkulasi 2 jam, waktu antara mendapatkan rata-rata 13 menit, kecepatan perjalanan sebesar 22,703 km/jam, dan faktor muat sebesar 37,729%. Hasil analisis menunjukan bahwa tidak semua indikator memenuhi standar, seperti waktu sirkulasi memenuhi standar, waktu antara melebihi standar, dan faktor muat yang di bawah standar kinerja angkutan umum.
Pengaruh Campuran Berbagai Media Tanam Terhadap Pertumbuhan Tanaman Buah Naga (Hylocereus costaricensis) Nehru, Nehru; Hartati, Hartati; Azmin, Nikman; Nasir, Muh.
JUSTER : Jurnal Sains dan Terapan Vol. 2 No. 3 (2023): JUSTER: Jurnal Sains dan Terapan
Publisher : Jompa Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57218/juster.v2i3.963

Abstract

Tanaman Buah Naga adalah merupakan jenis tanaman memanjat, di habitat aslinya tanaman ini memanjat tanaman lainnya untuk menopang dan bersifat epifit. Penelitian ini bertujuan untuk mengetahui apakah ada pengaruh berbagai media tanam terhadap pertumbuhan tanaman buah (Hylocereus costaricensis) Rancangan penelitian yang digunakan dalam penelitian ini adalah Rancangan Acak Kelompok (RAK) yang terdiri dari 5 (lima) kali perlakuan dan masing-masing pengulangan sebanyak 4 (empat) kali sehingga total perlakuan yang dilakukan sebanyak 20 (Dua puluh) kali unit perlakuan yang ditanami dengan buah naga (Hylocereus costaricensis). Hasil penelitian menunjukkan bahwa tinggi tanaman buah naga (Hylocereus costaricensis) pada umur 30  HST memiliki nilai rata-rata yang tertinggi 33,60 cm. Sedangkan panjang tunas  dengan nilai rata-rata yang tertinggi 0,51 cm. Selanjutnya jumlah tunas memiliki nilai rata-rata yang tertinggi 1,9.
Penerapan Data Mining Untuk Clustering Pada Toko Laura Grosir Dan Eceran Menggunakan Algoritma K-Means Kasini; Hidayati, Nani
JUSTER : Jurnal Sains dan Terapan Vol. 2 No. 3 (2023): JUSTER: Jurnal Sains dan Terapan
Publisher : Jompa Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57218/juster.v2i3.990

Abstract

Perkembangan teknologi dan informasi di era 5.0 membuat toko-toko grosir dan ecer di tuntut untuk mengikutin perkembangan teknologi agar usaha mereka lebih berkembang dan dikenal tidak hanya dikenal di sekitar toko saja, Toko Laura adalah sebuah toko grosir dan ecer yang menjual kebutuhan primer, kebutuhan sekunder. Banyaknya produk yang dijual oleh toko laura membuat terjadinya penumpukkan stok, karena ada produk yang laris terjual, laris dan kurang laris terjual. Data- data yang terdapat di Toko Laura ini tidak tersusun dengan baik seperti data penjualan, data pembelian dan pengeluaran tak terduga hanya sebagai arsip toko, sehingga tidak dapat dijadikan sebagai pengembangan strategi pemasaran toko. Oleh karena itu, perlu diterapkan data mining menggunakan metode K-Means pada Toko Laura. Penerapan metode K-Means dapat diterapkan pada Toko Laura untuk menentukan produk mana saja yang sangat laris, laris dan kurang laris. Algoritma K-Means metode Clustering diolah menggunakan software RapidMiner. Setelah menghitung 75 data yang ada di toko laura ecer dan grosir selama periode 3 bulan dan kemudian dimasukkan ke dalam aplikasi RapidMiner dan dilakukan pengujiam sesuai dengan pengelompokan 3 cluster sehingga didapatkan hasil pengelompokkan barang sesuai dengan perhitungan yang dilakukan secara manual yaitu kategori laris (C1) 3 barang, Laris (C2) 9 Barang dan kurang laris (C3) 63 barang.
Formulasi Dan Stabilitas Fisik Krim Ekstrak Daun Kelor (Moringa Oleifera Lamk) Dengan Perbedaan Humektan Yuliana, Tiara Hendry; Puradewa, Levi; Nurcahyani, Diah
JUSTER : Jurnal Sains dan Terapan Vol. 2 No. 3 (2023): JUSTER: Jurnal Sains dan Terapan
Publisher : Jompa Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57218/juster.v2i3.996

Abstract

One of the medicinal plants used as traditional medicine is kelor (Moringa oleifera Lamk). Moringa leaves are rich in vitamin C and antioxidants which can increase collagen production to prevent and slow down premature aging. The effect of humectants on cream preparations is to obtain creams that have good physical characteristics during storage. This study aims to determine the formulation and physical stability of moringa leaf extract cream preparations (Moringa oliefera Lamk) that meet the requirements. The variations of humectants used in this study include propylenglycol-glycerin (FI), glycerin (FII) and propylenglycol (FIII). Stearic acid, cetyl alcohol (oil phase) were melted on a water bath, TEA, methylparaben, propylparaben, glycerol and distilled water (water phase) were heated. The two phases gradually and grind to form a creamy mass and add the extract. Test the physical quality of the cream for 1 week, namely organoleptic test, homogeneity test, pH test, spreadability test and viscosity test. The results of the cream spreadability test of Moringa leaf extract (Moringa oleifera Lamk) in formula I did not meet the requirements, formula II produced cream preparations that met the requirements with a spreadability range of 5-6 cm, formula III did not meet the requirements. The results of the viscosity test on the formula I, II, III are in the range of 22000-30000 cPs. Based on the results of research on formula II with the addition of the humectant glycerin, it produces a good cream preparation.
Metodologi Pendekatan Sistemik: Metode Manajerial Mendasar Dan Powerful Yang Perlu Diimplementasikan Indrawati, Chatarina Dian; Pitoyo, Didik Joko; Murdapa, Petrus Setya
JUSTER : Jurnal Sains dan Terapan Vol. 3 No. 1 (2024): JUSTER: Jurnal Sains dan Terapan
Publisher : Jompa Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57218/juster.v3i1.1003

Abstract

Large-scale problems are complex and interrelated. Decisions made in these matters can have unexpected impacts. A systemic approach is a management method that can be used to solve systemic problems. This approach consists of two models, namely a qualitative model and a quantitative model. Qualitative models ensure that the issue is fully understood, while quantitative models allow for analysis of policy scenarios. In this article, the systemic approach methodology is briefly discussed. This methodology begins with a qualitative formulation in the form of a causal-loop diagram. Causal-loop diagram is a diagram that describes the cause-and-effect relationship between variables in a system. Next, this methodology is continued with quantitative formulation in the form of stock-and-flow diagrams. Stock-and-flow diagram is a diagram that depicts the flow and supply of resources in a system. Further computations for experimental purposes (up to policy scenario simulations) can be implemented using Vensim® software. This article discusses the systemic approach methodology up to the experimentation example stage.
Analisis Pengaruh Kendaraan Yang Melakukan Putar Balik Terhadap Kinerja Ruas Jalan (Studi Kasus Pada U–Turn Jl. Bypass Padang) Aufa Fadhil; Ircham; Veronica Diana Anis
JUSTER : Jurnal Sains dan Terapan Vol. 3 No. 1 (2024): JUSTER: Jurnal Sains dan Terapan
Publisher : Jompa Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57218/juster.v3i1.1006

Abstract

Transportation has an important role in human life, because transportation has a big influence on society, economic and social political development of a country. research discusses   analysis of influence of vehicles making a U-turn on Bypass No. KM 15, Aie Pacah, Tangah City, Padang City, West Sumatra. Research purposes is to determine level of service that occurs in traffic flow, to obtain this aim PKJI 2014 is used. This research obtains average travel time for vehicles making a U-Turn, length of queue when making a U-Turn, average travel time average number of vehicles disturbed and not disturbed by U-Turns and knowing level of service on that road section. From data processing it can be concluded that peak hour vehicle speeds are slower than non-peak hour vehicle speeds due to high traffic flow. Meanwhile, waiting time when a vehicle is about to turn around, during peak hours vehicles wait longer than during non-peak hours because volume of vehicles is denser during peak hours. Average queue length in opposite direction during peak hours is longer than during non-peak hours due to the density of vehicles during peak hours, it can be concluded that level of service C.
Mengidentifikasi keanekaragaman Hewan Invertebrata di Pesisir Pantai Sarae Me’e Desa Tolotangga Kecematan Monta Pipit Fadillah; Sri Julita Winata; Nilam Terpuji; Nurjanah; Sukarni
JUSTER : Jurnal Sains dan Terapan Vol. 3 No. 1 (2024): JUSTER: Jurnal Sains dan Terapan
Publisher : Jompa Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57218/juster.v3i1.1009

Abstract

Invertebrates are a large group of living creatures that do not have backbones. In biological classification, these animals include various groups such as arthropoda, mollusca, annelida, and echinodermata. Even without backbones, invertebrates have various body suppart systems, such as exoskeletons or internal skeletons. The study of invertebrtes not only illustrates their morphological divetsity, but also shows their crucial role in ecosystems as pollinators, decomposers, and food sources.and 97% of species in the world are invertebrates. This research activity is an activity that aims to identify data about the types of invertebrate animals that exist on Sarae Me’e beach, Sarae Me’e Beach is an open sea type beach, causing the waves on the beach to be large. This research was carried out on January 3 2024. The method used in this research is the exploration and identification method using exploration techniques along the coastline. The research objects are Invertebrate animals found along the coast of sarae me’e, Tolotangga village, Monta subdistrict. The data analysis technique used in this research is descriptive analysis technique. The results of the research faund four Invertebrate animals including the phylum Mollusca, Gastropoda, Athropoda and Annelida.and the salinity condition of the waterthat we tested using a salinity tool was 30% salt content on Sarae Me’e when we conducted the research.
Studi Inventarisasi Hewan Invertebrata Di Pantai Monta Kabupaten Bima Oktavianus Sarno; Ayu Rahmawati; Nurul Fahida; Winarti; Sukarni
JUSTER : Jurnal Sains dan Terapan Vol. 3 No. 1 (2024): JUSTER: Jurnal Sains dan Terapan
Publisher : Jompa Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57218/juster.v3i1.1010

Abstract

Field practicum held by students of Gnggusuwaru University, Biology Education Study Program, on Sarae Me'e Beach with the aim of clarifying invertebrate animals. There are several animal phyla that we found, namely the cnidaria phylum and the echinoderm phylum, which live on rocks at a distance of 3.95 meters from sea water. The arthropod phylum lives in sea water at a depth of 1.5 meters from the sea surface. The mollusk phylum lives on land at a distance of 15 meters from sea water.

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