Directory of Scientific Journals Indonesian Society of Applied Science (ISAS)
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Penerapan Total Productive Maintenance Guna Mengoptimalkan Ketersediaan Mesin di PT. ATMI Solo
Get PDFOptimal productivity needs to be supported by the availability of machines that are always ready to produce. The condition that needs to be maintained is that the machine does not stop frequently due to damage and causes the continuity of production to be hampered. According to the Japan Institute of Plant Maintenance (JIPM), the level of machine availability (availability) is said to be ideal when it exceeds 90%. At PT. ATMI Solo, 23.8% of 21 CNC machines still have availability percentage below 90%, namely Salvagnini S4 punching machine (69%), Starrag CF100 milling machine (79%), Trubend 3180 bending machine (82%), milling machine YCM TV 158B (82%), and Trumatic TC 200 R punching machine (89%).The main factor is the low availability of machines at PT. ATMI Solo is high machine downtime due to a breakdown. Therefore, it is necessary to implement Total Productive Maintenance (TPM) to optimize the availability of these machines. The implementation of TPM is Training and Education, Autonomous Maintenance, Planned Maintenance, and TPM in Administration (TPM in Administration), especially in the spare part Logistics section. The implementation of the TPM succeeded in increasing the availability percentage above 90% (based on data from the 2022 General Maintenance Daily Report), namely the Salvagnini S4 punching machine (94.13%), Starrag CF100 milling machine (96.36%), Trubend 3180 bending machine (99, 70%), YCM TV 158B milling machine (99.97%), and Trumatic TC 200 R punching machine (99.88%).Produktivitas yang optimal perlu ditunjang dengan ketersediaan mesin yang selalu siap berpoduksi. Kondisi yang perlu dijaga adalah jangan sampai mesin sering berhenti karena terjadi kerusakan dan menyebabkan kontinuitas produksi terhambat. Tingkat ketersediaan mesin (availability) menurut Japan Institute of Plant Maintenance (JIPM) dikatakan ideal bila sudah melebihi 90%. Di PT. ATMI Solo, sebanyak 23,8% dari 21 mesin CNC masih memiliki persentase availability dibawah 90%, yaitu mesin punching Salvagnini S4 (69%), mesin frais Starrag CF100 (79%), mesin bending Trubend 3180 (82%), mesin frais YCM TV 158B (82%), dan mesin punching Trumatic TC 200 R (89%). Faktor utama rendahnya ketersediaan mesin di PT. ATMI Solo adalah tingginya downtime mesin karena terjadi kerusakan. Karena itu perlu dilakukan penerapan Total Productive Maintenance (TPM) untuk mengoptimalkan ketersediaan mesin tersebut. Penerapan TPM yang dilakukan adalah Training and Education, Autonomous Maintenance, Planned Maintenance, dan TPM in Administration (TPM dalam Administrasi) terutama pada bagian Logistik spare part. Penerapan TPM tersebut berhasil menaikkan persentase availability diatas 90% (berdasarkan data Laporan Harian Umum Maintenance tahun 2022) yaitu mesin punching Salvagnini S4 (94,13%), mesin frais Starrag CF100 (96,36%), mesin bending Trubend 3180 (99,70%), mesin frais YCM TV 158B (99,97%), dan mesin punching Trumatic TC 200 R (99,88%)
Sintesis Mikroalga dengan Menggunakan Cahaya Lampu Bersumber Panel Surya
Get PDFPenelitian ini bertujuan untuk merancang metode sintesis mikroalga dengan menggunakan cahaya lampu yang bersumberkan pada panel surya (PLTS). Sistem yang dirancang ini menciptakan lingkungan kontrol yang optimal dalam proses pembuatan mikrosampel mikroalga. Sistem ini memberikan wawasan baru terhadap keterkaitan antar variabel lingkungan dan hasil mikroalga yang disinergikan dengan green technology. Menciptakan lingkungan buatan dengan cahaya dari lampu bersumberkan PLTS yang cukup mensuplai energi yang diperlukan selama sintesis berlangsung. Intensitas cahaya matahari tertinggi terjadi pada pukul 10.30 hingga 15.30 dengan besaran berkisar antara 80.000-122.000 lumen. Suhu air berkisar antara 26,4oC-28,4oC dengan error dibawah 1% dan menghasilkan rata-rata biomassa sekitar 3 mg/l. Sehingga disimpulkan bahwa solar panel dapat berfungsi dengan baik dalam mensuplai media sintesis mikroalga. 
Implementasi Algoritma Support Vector Machine (SVM) Untuk Klasifikasi Penyakit Stroke
Get PDFStroke or known as Cerebrovascular Accident (CVA) is a functional disorder caused by impaired blood flow function from within the human brain. Stroke carries a high risk of brain damage, paralysis, speech disorders, visual impairment, even death. Classification is one of a few methods in predicting stroke symptoms with the aim of obtaining accurate prediction of disease. The researchers implemented a method to classify stroke with the Support Vector Machine (SVM) algorithm. The SVM is a learning method used in medical diagnosis for classification, the researchers processed data sets using the Orange tool. The study used data sets from the data.world.com site with a total of 40,910 data. Using the Orange tool, the study managed to classify stroke disease well using the RBF kernel with cross validation techniques resulting in an accuracy of 94.8%. The results of this study can be concluded that the stroke classification model developed has excellent performance. Overall, these results indicate that the Stroke classification model developed is highly reliable and effective, with excellent ability to detect stroke cases and provide accurate predictions. Making better and quicker medical judgments can be aided by using this approach to diagnose strokes.
 
Integrasi Teori Dan Praktik Dalam Matakuliah Auditing: Pendekatan Pembelajaran Untuk Mahasiswa Akuntansi Politeknik Negeri Ambon
Get PDFThis research aims to explore the effectiveness of integrating theory and practice in auditing courses. By combining contextual and practice-based learning approaches, this research is expected to provide insight into how accounting study programs can improve the quality of graduates and the relevance of the curriculum to industry needs. This research is qualitative research, the method used is a case study where this method aims to understand in depth how theory and practice are integrated in auditing courses at the Ambon State Polytechnic. Participants in this research were selected using purposive sampling, where only students were selected who had taken auditing courses and were currently taking practicum courses. The data collection technique used was in-depth interviews, data analysis techniques were carried out using a thematic analysis approach. The research results are based on data obtained through interviews and classroom observations on students. The integration of theory and practice through PBL and LCM has a positive impact on improving students\u27 analytical, communication and collaboration skills. This method is in line with Experiential Learning Theory (Kolb, 1984), which emphasizes that students learn more effectively when directly involved in practical experience.
Keywords: Integration,theory, practice, auditing,learning approac
Analisis Laporan Realisasi Anggaran Belanja Pada Dinas Koperasi Dan UMKM Kota Ambon
Get PDFThis research aims to analyze the budget realization report at the Ambon City Cooperatives and UMKM Service. Expenditure is a component of budget realization that is given great attention, therefore it is necessary to carry out an analysis of expenditure realization to be used as an evaluation to increase expenditure realization in the following year. This research is a quantitative descriptive research. The data used in the analysis is the 2019-2021 Expenditure Budget Realization report. The analysis technique used is in the form of documentation and is analyzed using spending variance analysis, spending harmony analysis, and spending efficiency analysis. The research results show that spending at the City Cooperative and UMKM Department, seen from the spending variance, is generally said to be good because this analysis is categorized as a favorable variance, meaning that the realization is smaller than the budget. The spending harmony analysis is considered unbalanced because some of the funds are allocated for operational spending and only a few percent are allocated for capital spending. The analysis of spending efficiency in general has performed well and it can be said that the Ambon City Cooperatives and UMKM Department has carried out spending efficiency
Pengaruh Temperatur Temperring Pada Proses Heat Treatment Baja ST 60 Dengan Media Pendingin Oli Terhadap Kekerasan Dan Struktur Mikro
Get PDFSteel that has been hardened is brittle and not suitable for use. Through the tempering process, the hardness and brittleness can be reduced until it meets the requirements for use. Hardness decreases, tensile strength will also decrease while the ductility and toughness of steel will increase. This research aims to determine the effect of tempering temperature in the heat treatment process of ST 60 steel with oil cooling media on hardness distribution and microstructure. The tempering process is carried out at temperatures of 500°C, 400°C, and 300°C with a hardening temperature of 950°C using Mesran SAE 40 Oil Quenching. The method used in this research is experimental research for the specimen is ST 60. The composition test results show that the material The base is included in the medium carbon steel group or medium carbon steel with a carbon content of 0.452%. Hardness testing used a Micro Hardness Tester where the hardness of the tempered specimen was 255.5, and the hardness of the hardened specimen was 189.7 which decreased. Microstructure testing shows that the microstructure of the raw material consists of ferrite and pearlite with balanced crystal shape and size according to the carbon content of 0.452Baja yang telah dikeraskan bersifat rapuh dan tidak cocok untuk digunakan, melalui proses tempering kekerasan dan kerapuhan dapat diturunkan sampai memenuhi persyaratan penggunaan. Kekerasan turun, kekuatan tarik akan turun pula sedang keuletan dan ketangguhan baja akan meningkat. Penelitian ini bertujuan untuk mengetahui pengaruh suhu Tempering pada proses heat treatment baja ST 60 dengan media pendingin Oli terhadap distribusi kekerasaan dan struktur mikro. Proses temper dilakukan pada suhu 500°C, 400°C, dan 300°C dengan temperatur hardening 950°C menggunakan Quenching Oli Mesran SAE 40. Metode yang digunakan pada penelitian ini adalah penelitian eksperimental untuk spesimen adalah ST 60. Hasil uji komposisi menunjukkan material dasar termasuk dalam golongan medium carbon steel atau baja karbon menengah dengan kandungan carbon 0,452%. Pengujian kekerasan menggunakan Mikro Hardness Tester dimana kekerasan spesimen temper yang sebesar 255,5, dan kekerasan spesimen hardening sebesar 189,7 mengalami penurunan. Pengujian struktur mikro menunjukkan struktur mikro raw material terdiri dari ferit dan perlit dengan bentuk dan ukuran kristal yang berimbang sesuai dengan kandungan karbon 0,45
Airflow Velocity Measurement Of Turbular Test Section Based On Rpm Setting Configuration In Open Circuit Subsonic Wind Tunnel
Get PDFSpeed measurements in the test section based on the RPM setting configuration of the open-type subsonic wind tunnel with a turbular test section to obtain the properties of the airflow in the test section based on the RPM setting configuration in the open-type subsonic wind tunnel. The simulation process is carried out using software Computational Fluid Dynamics (CFD) , ANSYS Fluent. The simulation process is carried out by the method Moving Reference Frame (MRF) that the fluid phenomenon is moved to move the fan in the wind tunnel to obtain airflow properties in the turbular test section, open-type subsonic wind tunnel. In the testing process, airflow velocity measurements were carried out in the turbular test section of the open-type subsonic wind tunnel using an air velocity measuring instrument, namely anemometer and hotwire. The software Computer Aided Design (CAD), Solidworks, serves to create the geometry of the open-type subsonic wind tunnel and has a turbular test section inspired by the Didacta Italia PN21 D open-type subsonic wind tunnel. The properties that occur in the test section based on the configuration of the RPM setting in the open-type subsonic wind tunnel turbular test section are expected to achieve results to obtain the value of the velocity distribution, pressure distribution and turbulence intensity value so that it is useful and supports the operation and testing process to be carried out in an open-type subsonic wind tunnel with a turbular test section
Implementasi Sistem Pengusir Hama Burung Berbasis Arduino untuk Optimalisasi Pertanian: Kajian Monitoring Kelembapan Tanah dengan Soil Moisture Sensor
Get PDFFaktor utama penurunan kuantitas pada pertanian padi ialah serangan berbagai OPT (Organisme Pengganggu Tanaman) seperti burung pipit dan faktor lingkungan karena kekeringan pada tanah. Untuk mengatasi masalah tersebut para petani membutuhkan inovasi untuk mempermudah pekerjaannya. Penelitian ini dilakukan untuk mengembangkan alat pengusir hama padi tradisional menjadi modern, dikontrol secara otomatis berbasis arduino mega dan Internet of Things (IoT) menggunakan sensor soil moisture sebagai alat untuk mengamati kelembapan tanah. Sensor Ultrasonik sebagai sensor pendeteksi pergerakan hama burung dengan gerak memutar 180°, servo sebagai output penggerak pengusir hama burung dengan gerak memutar 180° dan tanpa adanya objek yang dibaca servo tetap bergerak setiap 10 detik sekali, sensor soil moisture sebagai monitoring kelembapan tanah. Hal ini bertujuan untuk memudahkan petani dalam proses monitoring kelembaban tanah sawah dan pengusiran hama padi. Yang nantinya akan bisa di monitoring dengan jarak -+ 1-3 Km dengan menggunakan telepon seluler. Berdasarkan hasil pengujian keseluruhan system yang telah dirancang pada sensor ultrasonik telah merespon sejauh kurang lebih 2 meter. Sedangkan pengujian pada sensor soil moisture memiliki nilai rata – rata error perbandingan hasil ukur sebesar 28%. 
Monitoring Dan Datalogger Untuk Daya Keluaran Sistem Pembangkit Listrik Tenaga Angin
Get PDFEnergi listrik dapat dihasilkan dari berbagai jenis energi primer dengan memanfaatkan energi terbarukan salah satunya yaitu angin, untuk memanfaatkan energi terbarukan tersebut membutuhkan peralatan, misalnya untuk tenaga angin membutuhkan peralatan utama turbin angin untuk memastikan bahwa perangkat sumber energi tersebut berjalan dengan baik maka memerlukan perawatan dan pemantauan. pematauan secara konvensional mengukur mengunakan multimeter dan perlunya pencatatan data agar bisa diolah. Fungsi dari memonitoring adalah untuk mengumpulkan data sebanyak-banyaknya untuk itu manusia bisa mengunakan teknologi Internet of Thing (IOT) sebagai media pemantauan dan pencatatan data. Sistem datalogger akan merekam Kecepatan angin, Tegangan dan Arus, secara real time untuk mengetahui kondisi serta korelasi antara lingkungan dan daya yang dihasilkan oleh turbin angin dengan memanfaatkan mikrokontroler. Berdasarkan hasil pengukuran toleransi kesalahan pada sensor yang di gunakan memiliki rata – rata berada dibawah 5%. Pada sensor kecepatan angin RS-FSJT-N01 error 0,089%. Pada sensor tegangan turbin angin error 0,08%. Pada sensor arus ACS712 5amp error 0,051%. Kemudian kecepatan total pengiriman data sebesar 2154 milidetik per 1 record data
Analysis of Types of Flexible Pavement Damage Using the Pavement Condition Index Method
Get PDFRoads are land transportation infrastructure that is very important in facilitating economic relations and other social activities. If road damage occurs, it will not only result in the obstruction of other economic and social activities but can also cause accidents for road users. The aim of this research is to explain the types of damage to the surface layer of flexible pavement and to find out the index value of the pavement condition index for Jalan Kreteg-Lebak Jaya based on the PCI (Pavement Condition Index) method so that the results can be used in preparing road maintenance programs. The results of this research in segment 1 showed 4 types of damage, namely edge cracks, patches, holes, weathering, and loose granules, with a PCI value of 22, very poor pavement conditions using this type of treatment. reconstruction/recycling. In segment 2, there were 4 types of damage, namely edge cracks, patches, holes, weathering, and loose granules with a PCI value of 26 in poor pavement conditions using the type of reconstruction or recycling treatment. In segment 3, there were 3 types of damage: holes, slip cracks, weathering, and loose granules with a PCI value of 46. Fair pavement conditions using reconstruction or recycling treatment in segment 4, there were 4 types of damage, namely crocodile skin cracks, edge cracks, holes, weathering, and loose granules, with a PCI value of 29 for poor pavement conditions using the type of reconstruction or recycling treatment.Roads are land transportation infrastructure that is very important in facilitating economic relations and other social activities. If road damage occurs, it will not only result in the obstruction of other economic and social activities but can also cause accidents for road users. The aim of this research is to explain the types of damage to the surface layer of flexible pavement and to find out the index value of the pavement condition index for Jalan Kreteg-Lebak Jaya based on the PCI (Pavement Condition Index) method so that the results can be used in preparing road maintenance programs. The results of this research in segment 1 showed 4 types of damage, namely edge cracks, patches, holes, weathering, and loose granules, with a PCI value of 22, very poor pavement conditions using this type of treatment. reconstruction/recycling. In segment 2, there were 4 types of damage, namely edge cracks, patches, holes, weathering, and loose granules with a PCI value of 26 in poor pavement conditions using the type of reconstruction or recycling treatment. In segment 3, there were 3 types of damage: holes, slip cracks, weathering, and loose granules with a PCI value of 46. Fair pavement conditions using reconstruction or recycling treatment in segment 4, there were 4 types of damage, namely crocodile skin cracks, edge cracks, holes, weathering, and loose granules, with a PCI value of 29 for poor pavement conditions using the type of reconstruction or recycling treatment