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Published by Institut Sains dan Teknologi AKPRIND

ISSN : 19798415 EISSN : - DOI : -

Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Articles 583 Documents

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PENGARUH PERBANDINGAN KOMPOSISI TERHADAP ANGKA KONDUKTIVITAS TERMAL PAPAN PARTIKEL CAMPURAN SEKAM PADI DENGAN TIGA JENIS SERBUK KAYU Wibowo, Hary; Nugroho, Lilik Cahyo
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 6 No 1 Agustus 2013
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Rice husk and wood sawdust produced in many parts of Indonesia as forest and agricultural waste. Both of these types of waste materials that can potentially be improved benefits and economic value, one way to be further processed into particle board. Particle board from a mixture of rice husk and sawdust than required strength properties, it is also necessary to study the nature of the heat transfer capability The purpose of this study to determine the value of the thermal conductivity of a mixture of rice husk particle board with three types of sawn wood dust. Three kinds of powder sawdust wood is teak, mahogany wood powder, sawdust and coconut. The study was conducted by means of modifications based on ASTM C177. Test particle board made â€‹â€‹from a mixture of rice hulls - three types of wood dust by weight of the composition of each mixture 1:1, 2:1, 4:1 and 3:1 with density. The results showed that the rate of thermal conductivity (k) of the lowest 0.997 W / m Â° C obtained in a mixture of rice husk particle board with teak wood powder with 1:1 composition. While the largest numbers conductivity obtained in a mixture of rice husk particle board - sawdust coconut (glugu) of 1.315 W / m Â° C with a 2:1 composition.

ANALYSIS OF REWETTING TIME AND TEMPERATURE DISTRIBUTIONS DURING COOLING PROCESS IN VERTICAL RECTANGULAR NARROW CHANNEL Catrawedarma, Bagus; -, Indarto; Juarsa, Mulya; Antariksawan, Anhar Riza
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 6 No 1 Agustus 2013
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Cooling process to analyze effect of gap size to rewetting time and temperature distributions were studied from transient temperature of surface plate. It as result of experiment using two vertical plate with the initial temperature about 600Â°C. Debit and temperature of cooling water are 0,09 L/s and saturated temperature. The gap sizes were changed from 1 mm, 2 mm, and 3 mm. As the results showed that the smaller the gap size, the longer the rewetting time. Pattern of temperature distribution is similar at initial condition for all of gap sizes and the smaller the gap sizes, the longer the time of decreasing temperature.

PENGARUH KONSENTRASI ELEKTROLIT DAN WAKTU ANODISASI TERHADAP KETAHANAN AUS, KEKERASAN SERTA KETEBALAN LAPISAN OKSIDA PADUAN ALUMINIUM PADA MATERIAL PISTON Sidharta, Bambang Wahyu
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 7 No 1 Agustus 2014
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Aluminum alloys used in the manufacture of automotive parts, such as piston, wherein the component is fast moving parts, which would have to meet certain physical and mechanical properties such as wear resistance and hardness. To improve the physical and mechanical properties such as wear resistance and hardness in aluminum alloy, then the anodizing process was chosen, because this process will increase the hardness and wear resistance of the metal. The increasing of hardness and wear of the aluminum alloy is due to the aluminum oxide layer formed on the anodizing process.The purpose of this study was to determine the effect of electrolyte concentration and time of anodizing process against hardness and wear resistance , as well as the thickness of the oxide film on aluminum alloy as the piston material.The process of anodizing of aluminum alloys performed at different electrolyte concentrations, i.e. 15, 20 and 25% vol. H2SO4 (sulfuric acid) with the addition of 6% wt. H2C2O4 (oxalic acid) at each concentration of sulfuric acid. The length of the anodizing time for each electrolyte concentration of 3, 5 and 7 minutes, while the electric voltage used is 24 volts.From this research, the best results obtained by anodizing using electrolyte 15% vol. H2SO4 + 6% wt. H2C2O4 for 7-minute process that increase the material hardness from 115 to 190 VHN; and the best specific wear â€‹â€‹(Ws) 7.15 x 10-5 mm2/kg and the thickest oxide layer 83.81 Î¼m.

PENERAPAN TEKNIK SEO (SEARCH ENGINE OPTIMIZATION) PADA BLOG (STUDI KASUS: NOVA13.COM) Cahyono, Nova Tri; Triyono, Joko; Raharjo, Suwanto
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 6 No 1 Agustus 2013
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Websites on the internet is now very much and will continue to grow over time. To facilitate the search for websites on the internet, it needs a search engine. There are many types of search engines, but only one of the most popular and frequently visited, namely Google. The number of websites that have been indexed by Google is also very much, even in the millions. This will certainly lead to competition between the websites that have similar themes and discussions as well as having an almost similar keywords to snatch the top position of search results or SERP (Search Engine Result Page) on Google. With the SEO techniques applied, then the effort to get the best position in Google SERP will be easier. To implement the SEO techniques to blog with purpose to get the best position in Google SERP, first decide the targeted keywords and create a blog and set up the blog to make it more SEO Friendly, then implementation will use SEO methods SEO Onpage and SEO Offpage techniques to support performance. After making the implementation of these two methods will be tested on the Google SERP position blog for several days to know the progress of the SEO techniques. The results obtained that implemented SEO technique before the blog positions was on the second page of Google SERP, but after implementation SEO technique then slowly improved blog position and even be in the top five the first page of Google. It can be concluded that the implementation of proven SEO techniques went well.

SISTEM PENDUKUNG KEPUTUSAN PEMILIHAN PRODUK UNGGULAN DAERAH MENGGUNAKAN METODE ENTROPY DAN ELECTRE II (STUDI KASUS: DINAS KOPERASI, INDUSTRI DAN PERDAGANGAN KABUPATEN LAMONGAN) Handoyo, Eko; Cahyani, Andharini Dwi; Yunitarini, Rika
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 7 No 1 Agustus 2014
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Competition superior product in the future become more and more stringent with the increasing pace of economic development, industrial growth and technological progress. This competition makes each industry should be more careful in formulating policy formulation stratgi. Making the decision to get a superior product that suits your needs and abilities required an accurate and effective decisions so that no one and minimize the loss in terms of cost and time. This study uses the entropy method and elactre II. Research with this method of ranking the results based on the amount of gain dominance resulted in ranking the more partial and sensitive than perangkingan based level. Criterion in this system is the turnover, labor, investment value, the target market, the amount of raw materials and the number of firms in a superior product. This study matches the accuracy of the system reaches 30%.

PENGARUH PENGASAMAN PADA SPESIASI CU(II) DALAM SISTEM ASAM HUMAT-AIR Sunarsih, Sri; Santosa, Sri Juari; -, Mudasir
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 6 No 1 Agustus 2013
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The influences of acidify and humic acid (HA) weight on Cu(II) speciation in humic acid-water system has been studied. The HA was extracted from peatsoil in Siantan, Pontianak, West Kalimantan. The Cu(II) solution was made from Cu(SO)4.s H2O crystal of E.Merck for analytical grade. The acidify effect test carried out with 50 mL of Cu(II) solution in 100 ppm concentration then varied their pH level at 4, 5 ,6, 7 and 8. To each solution added with 30 mg of HA, be interacted in 1 hour, and then settled in 24 hour to be equilibrium. The same procedure were done to prepare the solutions for determining the effect of HA weight on Cu(II) speciation. The weight of HA varied at 20, 40, 60, 80 and 120 mg with pH solution 5,0. The concentration of total Cu and hydrated Cu(II) were determined using Atomic Absorption Spectrophotometer and Ionic Selective Electrode (ISE), respectively. Based on measurement of total Cu and hydrated Cu known that if the initial pH of solution higher, the absorption of Cu to HA became higher too. The fraction that was not absorbed distributed as hydrated Cu and Cu-AH complex that their concentration was in equilibrium at pH value of 5,0. The result of pH measurement at the equilibrium, the value of Ksp Cu(OH)2 and calculation of OH- indicated that there were no deposition of Cu(OH)2 formed. The measurement also indicated that if the more weight of HA applied on the interaction, the absorption to Cu became higher. The fraction that was not adsorbed increasingly as Cu-AH complex.

PREDIKSI KETIDAKSTABILAN LERENG BERDASARKAN DATA HYDROLOGY MONITORING -, Supandi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 6 No 1 Agustus 2013
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Mining activities have a high risk which one of them is the slope stability. Nature provides information about slope instability indication in various ways and methods. Observing indication of instability based on incidents that have occurred is an important study for improvement. One thing to do is viewing the correlation between groundwater position before and after the landslide that by knowing its behavior, the preventive measures against this potential can be reduced or eliminated. Groundwater monitoring installation is commonly done because this data is contributed to the slope stability analysis. Optimizing all existing data sources for various purposes are required to achieve effectiveness and job efficiency. The study was conducted by observing the behavior of groundwater level before the landslide occurred so that it can be deduced correlation between these two things. In this study, ground water level is observed at the closest point to the location of landslide that can reflect the real correlation. Groundwater level observation data were plotted into graphs and combined with related data such as rainfall intensity. Observational data groundwater levels and precipitation associated with the landslide incident can be obtained before the ground water level behavior occur landslide. Plotting generate a form of "horse saddle". Information obtained from this data is the slip surface is formed when the inlet pushed into this field so that the ground water level has decreased. As the slip surface stopped the water will keep filling until it formed a stable and when the groundwater level increasing it is an indication of slope instability will be occur. Based on this study the groundwater level will form a saddle horse pattern before the landslide. When discovering it then it should give extra attention and conduct a risk assessment.

APLIKASI SISTEM INVERTER 1 FASA DENGAN KAPASITAS BEBAN 1200 WATT Suyanto, Muhammad
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 6 No 1 Agustus 2013
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Providers Backup Power Supply for Household Electricity Load In automatic, very necessary as an emergency response efforts in the event of termination of electricity to consumers. So with a backup power supply that has been prepared, the electric lighting in the household is not disrupted. The effort is meant is conducted by making a piece of equipment such as power supply 1 Phase Inverter System Design for Load Capacity 1200 Watt, is a piece of equipment that can serve as a replacement power supply but can work efficiently and save energy. After designing and testing tools execute the inverter, it can be some of the results of the designation gauges recorded and performed calculations. The larger the installed load will produce a greater flow, this caused huge load requires a large current flow. At 50-250 cosQ load close to 1, while the 300-1200Watt load cosQ up and down, this happens when the 300-1200Watt load test, the load used in the form of incandescent bulbs. The voltage on the inverter device is sometimes not reached 220 volts when tested. This is due to the voltage source when the test does not reach the stable, and also due to the greater load at the time of testing with mixed loads. Long period of time of an inverter is able to work depends on the quality of the battery and how to use it.

SISTEM KUNCI ELEKTRONIS DENGAN PEREKAM WAKTU AKSES BERBASIS MIKROKONTROLER AT89C51 Priyambodo, Sigit; Heironi, Anik
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 7 No 1 Agustus 2014
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The development in technology, especially in electronic technology. Every technology in many fields of study mostly need electronic device. Even door lock incur-porate electronic technology to junction better.To make electronic key system follow few steps. First, the planning to design electronic and mechanic system of the door lock. Second, design the hardware and drill the PCB, Then assemble the electronic compo-nents. Third, design of the software use algoritm from system. Fourth, flash the assembler program into the IC AT89C51 and set it to hardware, next test the completed system.The result, shows that the system can be applied to the door lock system with time recording access. It uses Real Time Clock (RTC), Line Port Terminal (LPT), IC AT89C51 and handphone siemens M35i as the interface system.

IDENTIFIKASI DAGING SEGAR DAN BUSUK MENGGUNAKAN SENSOR WARNA RGB DAN pH METER DIGITAL Pambudi, Prastyono Eko; Sutanta, Edhy; -, Mujiman
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 7 No 1 Agustus 2014
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The high demand and limited availability meat in the market cause the pricesto be expensive, and increasingly traders that rotten the meat mixinto the fresh meat. To avoidthe risk, people should know the characteristics ofrotten meat and fresh. This research was development of previous research that develops a to olto identification the fresh meat and rotten with RGB color sensor.This research developed a to olto identification fresh meat and rotten using a digital pH meter senso rbased on value of acidic, basic, or neutral. pH meter works based on pH sensor, theg lass electrode. Digital pH meter works by comparing the potential difference at the sensor electrode with Hions at the meat. By using Op-Amp as a voltage amplifier with higher input impedance, then it can be display a signal voltage(mV) that converted to digital format byt he ADC(Analog to Digital Converter) that it can be displayed and read able on the LCD screen.acidic

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