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KARAKTERISASI SIFAT OPTIK C-DOTS DARI KULIT LUAR SINGKONG MENGGUNAKAN TEKNIK MICROWAVE Putro, Permono Adi; Roza, Liszulfah; -, Isnaeni
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 2 Februari 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (703.232 KB) | DOI: 10.34151/technoscientia.v11i2.894

Abstract

Carbon dots (C-dots) are a new type of phosphorescent nanoparticles that can be easily synthesized from natural sources or raw materials. The outer shell of cassava is the second waste obtained from cassava skin waste which is less attention to be utilized. Synthesis of C-dots from the outer shell of dried cassava has been successfully carried out with Microwave techniques. Synthesis of C-dots was carried out using water as a solvent with a variation of the concentration of precursor solutions to the microwave duration. Microwave duration causes changes in the structure and optical properties of C-dots. C-dots are characterized to study the optical properties of the UV-Vis absorbance spectrum and emission intensity in the form of emissions. The observed optical properties aim to determine the C-dots energy transition, such as surface and core energy. The core energy level becomes dominant in the transition π→π* compared to the transition of n→π* in surface energy when the C-dots concentration increases so that energy shifts. This phenomenon is known from the top of the broad C-dots emission spectrum and shifts to longer wavelengths. In addition, we suspect that the difference in C-dots emissions is caused by the molecular density and content of the preparation based on the concentration of precursor solutions and the length of microwave time.
Jurnal Technoscientia vol 11 no 1 Agustus 2018-Cover-Redaksi-Daftar Isi Technoscientia, Jurnal Teknologi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 1 Agustus 2018
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (601.802 KB) | DOI: 10.34151/technoscientia.v11i1.802

Abstract

Jurnal Technoscientia vol 11 no 1 Agustus 2018-Cover-Redaksi-Daftar Isi
PENGARUH PENAMBAHAN PLASTIK POLIPROPILENA TERHADAP YIELD DAN KUALITAS MINYAK NABATI HASIL PIROLISIS BONGGOL JAGUNG YANG MENGGUNAKAN CO2 SEBAGAI GAS PEMBAWA Edgar, Justin; Supramono, Dijan
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 2 Februari 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (653.771 KB) | DOI: 10.34151/technoscientia.v11i2.805

Abstract

Indonesia has potential sources for development of renewable fuels from agricultural wastes, one of which is corn cobs. Many researches have tried to convert corn cobs into a liquid fuel by pyrolysis, but the resulting bio-oil has a high oxygenate content, resulting in a low heating value. On the other hand, plastic waste has become a major problem for Indonesia, amounting to 5,4 million tons of waste per year. Around 16% of the total plastic waste is polypropylene, in which its high hydrogen/carbon ratio is an attractive hydrogen source for co-feeding with corn cobs in co-pyrolysis. Synergetic effect has been formed between the two, which has been proven to increase the yield and quality of the resulting bio-oil. Most co-pyrolysis process has been conducted with nitrogen as carrier gas. Its high price creates an economic barrier for commercial production of bio-fuel using co-pyrolysis method. It is proposed to substitute nitrogen with carbon dioxide. Beside of its low cost, carbon dioxide is known to have a heat-trapping effect, thus increasing the heat flux to particle feed during co-pyrolysis process. Three feed compositions during the process has been investigated to observe the effect of feed composition to the yield and quality of the non-polar (non-oxygenated) fraction of resulting bio-oil, which will be compared to commercial gasoline. Co-pyrolysis process was conducted in a stirred tank reactor with low heating rate of 5oC/min, maximum temperature of 500oC. Non-polar fraction of the resulting bio-oil has been characterized using GC-MS (gas chromatography-mass spectroscopy) and H-NMR (hydrogen-nuclear magnetic resonance). Bio-oil yield is lower compared to its counterpart when nitrogen is used as carrier gas, but H-NMR results shows that the non-polar fraction have a high branching index, low alkene and aromatic contents, which is potential to be used as a bio-fuel.
MODEL SISTEM INFORMASI MANAJEMEN KETAHANAN PANGAN (PEMANFAATAN DAN KETERSEDIAAN PANGAN) -, Zaidir; -, Erizal
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 2 Februari 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (853.761 KB) | DOI: 10.34151/technoscientia.v11i2.925

Abstract

The concept of food security considers the availability of food, access to food and the use of food as the main aspects supporting food security and linking these aspects to ownership of household assets, livelihood strategies, and political, social, institutional and economic environments. In Law Number 18 of 2012 it is said that the Government and Regional Government are obliged to develop, compile and develop a food information system on aspects of food utilization and availability. The benefits of information have a significant impact on an institution or the public. Quality information can only be produced from a quality information system. Data and information are needed as a basis for policy making and decisions from planning to evaluating activities. The model development method in this study is with the stages of analysis, design and coding and model testing. The results of this study are a model of the Food Security Information System that can provide information on food security analysis with various variations. Indicators of achievement in the study are in the form of design use case diagrams, database design and interface design.
ANALISIS JARAK JANGKAUAN LORA DENGAN PARAMETER RSSI DAN PACKET LOSS PADA AREA URBAN Yanziah, Asma; Soim, Sopian; Rose, Martinus Mujur
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia-Vol 13 No 1-Agustus 2020
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Low Power Wide Area Networks (LPWAN) is a wireless communication technology that supports the development of the Internet of Things (IoT). LPWAN offers a wider coverage area and low energy consumption. LoRa is one of the most popular LPWAN technologies. LoRa technology is suitable for IoT application scenarios that only need to send small amounts of data over long distances and low-power transmission data. This research focuses on testing the range of the LoRa Rfm 95/96 chip at 920 MHz and SF7 frequencies for urban areas. The parameters used are Received Signal Strength Indicator (RSSI) and Packet loss. RSSI test results will be compared with RSSI calculation results using the log normal shadowing model. The RSSI value of the test results is closer to the calculation of the RSSI value for the free space area with the addition of a shadowing effect. When viewed from the range of RSSI values ​​at each test point, RSSI is relatively stable. However, based on RSSI average testing and calculation, RSSI has decreased while packet loss has increased with each additional distance. From this study, the maximum LoRa range is 2 km. This is in line with LoRa specifications for urban areas.
ANALISIS PRODUKTIVITAS MELALUI PENGENDALIAN KUALITAS MATERIAL, KOMPONEN, DAN PRODUK JADI DENGAN PENDEKATAN SIX SIGMA PADA PROYEK LRT JABODEBEK DI PT INKA -, Suseno; -, Cahyanto
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia-Vol 13 No 1-Agustus 2020
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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Abstract

The Quality Assurance Division is the part responsible for the quality of Jabodebek's Light Rail Transit (LRT) products, or the railroad components in PT INKA. Defects in the under frame and water test were obtained as many as 70 units, in addition to the Production Planning and Control (PPC) section of the data resume of material & component adequacy, from the beginning of the project up to October 25, 2019, found a total of 29,395 NCR category findings ( No Conformity Report). This caused a decrease in the level of productivity of PT INKA. To increase company productivity, and to find out what internal factors are causing waste in the underframe test and water test on materials & components, as well as providing suggestions for improvement, the Six Sigma DMAIC method is used. The DMAIC cycle is a key process for continuous improvement towards the Six Sigma target. The steps taken are define, measure, analize, improve and control. DPMO value in the under frame and water test is 3,076.65 and has a sigma level of 4.524 and the material & component DPMO value is 2,587.92 and has a sigma level of 4.6060. The improvement phase is done is the company must focus on one of the projects, Perform tools maintenance, especially pneumatic bolt fasteners, do not use number two quality components or materials, the company should conduct further research or development and conduct training for employees.
KOMPARASI ALGORITMA CLUSTERING DENGAN DATASET PENYEBARAN COVID-19 DI INDONESIA PERIODE MARET-MEI 2020 Tamtelahitu, Trientje Marlein
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia-Vol 13 No 1-Agustus 2020
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In data mining, there is a predictive model, namely predicting the value of different sample data sets, and testing into three types such as classification, regression and time series. While descriptive models allow us to determine patterns in sample data and divide them into groups, summaries and association rules. Report on the results of experiments on algorithms that are quite widely used in the field of machine learning. This experiment aims to measure performance on commonly used datasets in machine learning studies. The main performance factor to be compared in this experiment is the level of accuracy of the independent experiments on the dataset used. This research uses clustering algorithm method to compare various clustering algorithms using Weka Tools to find out which algorithm will be more convenient for users to do clustering algorithm using the Covid-10 distribution map dataset in Indonesia from March-May 2020. K-means taking the points closest to the center whereas Farthest-First picks the furthest points. Farthest-First can complete the clustering process but with a lower quality than K-Means. And other experiments, on the method of Making Based on Clusterd Density and EM (Expectation-Maximization) prove the same accuracy. The EM grouping method proves low (less than 50%) of the results comparing the Clusterd Based Densitity Making Method, with a percentage reaching 74%.
KARAKTERISTIK MEKANIK KOMPOSIT SERAT CANTULA (AGAVE CANTULA ROXB) SEBAGAI ALTERNATIF BAHAN PENGUAT TERHADAP PARTISI RUMAH Wilaha, Lidi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 2 Februari 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (516.144 KB) | DOI: 10.34151/technoscientia.v11i2.1265

Abstract

Using of natural fiber as ingredients of particle board products, still have to various studies to gain the character of the product’s standard. Study of Cantula fiber utilization with matrix of Yukalac 157 BQTN-EX unsaturated polyester as the design of composite manufacturing partition (simplicity wall) of housing is professionally researched and potential, it's important to do immediately investigation potential of characteristic Cantula’s fiber as alternative composite material to partition housing. Cantula fiber that has been cleaned, then soaked with a solution of NaOH 10% for 4 hours, then recleaned back, and let it dry naturally in the room without stright sunlight for 3 days until moisture content ranged from 8-10%. The composite samples are made with combination method hand laying and press shape with the fractional volume of 10%, 20%, 30%, 40%, and 50%. For matrix and hardener, using the Polyester Yukalac Type 157 BQTN-EX and MEXPO, the formal press is made by steel. To tool test impact standard is JIS K-7113, the spesimen test use ASTM D-5941, with microphoto, and SEM cross analysis used to for failure or errors (broken) analysis. The results have overall due to the fiber volume fraction Cantula-polyester compound against mechanical characteristics is grow up experienced of toughness impact with consecutive average volume fraction 10%, 20%, 30%, 40% therefore 6831.5 J/M2, 7464.5 J/M2, 8549 J/M2 and 10151.5 J/M2. But on the fraction of the fiber volume 50% started to droppen the value until 9515 J/M2. The increasing of absorby energy is caused by adding of fiber to compound, therefore be able to increase traits of toughness or properties and reversal. The fracturing of test impact on composite Vf 10%, 20%, 30% are failure is due to the outcome of matric failure increasingly, but at Vf 40% has a strengthening of fiber that is marked with the broken fiber and matrix tend to be simultaneously. in Vf 50%. The failure of the dominant due to the composition of the matrix that is less, the reinforcement of apparent comes only from the fiber, like sawn by the cross-section, that shows the debt phenomenon of the as much as number of fibre pulled out.
RANCANG BANGUN SISTEM MONITORING SUHU DAN KELEMBABAN PADA RUANG SERVER BERBASIS IoT (INTERNET OF THINGS) Santoso, Gatot; Kristiyana, Samuel; Hani, Slamet; Mujahidin, Achmad Miradani
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 2 Februari 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (603.351 KB) | DOI: 10.34151/technoscientia.v11i2.1248

Abstract

Room server is a room that is used to store server computers and network devices. Room server is important assets for companies or institutions that implement information technology as a support in their daily activities. The importance of that is because in the server room there are applications and databases that store all important and valuable information for the company or institution concerned, therefore the server room must always be in good condition. Design of temperature and humidity monitoring systemsis designed to detect changes in temperature and humidity in the room using ESP8266 Node MCU as the main control, then use DHT 11 as a temperature and humidity detection sensor, then the data will be sent to the Telegram application already installed on the smartphone and displayed in the LCD. If the MQ-2 gas sensor detects a smoke greater than 500 ppm, the buzzer active. With this tool, it is expected to be able to monitor the real time room temperature and humidity in the server room so that it can reduce the damage to the hard drive or other damage.
PERKEMBANGAN LINGKUNGAN PENGENDAPAN DARI FORMASI SAMBIPITU KE FORMASI WONOSARI DAERAH JELOK, DESA BEJI, KECAMATAN PATOK, KABUPATEN GUNUNGKIDUL, DAERAH ISTIMEWA YOGYAKARTA Tania, Dina
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 2 Februari 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1529.009 KB) | DOI: 10.34151/technoscientia.v11i2.1252

Abstract

The research is investigating Middle Miocene to Pliocene geological stage of sediment depositional changing in Dusun Beji, Desa Jelok, Kecamatan Patuk, Kabupaten Gunung Kidul, Special Regionof Yogyakarta. Base on the measure section of cross-section analysis and bentonitic fossil analysis, the research area has three formations from old to young formation such as Sambipitu Formation, Oyo Formation, and Wonosari Formation. The result analyzed that microfossil show Sambipitu Formation deposition in the middle of the neritic zone and changedintothe deep neritic zone until lower bathyal in Oyo Formation, and it changes become more shallow in Wonosari Formation, which is depositions in the lower neritic zone to upper neritic zone as long Middle Miocene to Pliocene age. Sambipitu and Oyo Formation havedepositional changing from Lower Fan to Supra Fan Lobes on Mid Fan with lithology change form silt with bioturbation structure to pumice breccia, tuff, sandstone and claystone with slump structure, lamination and massive. In other depositional in Wonosari Formation have environment of Inner Ramp with clastic limestone dominated such as calsirusite and calcarenite.

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