bluuebunny/crossref_metadata_2025 huggingface dataset:
Utilization of Edamame (Glycine max (L.) Merr) And Red Bean (Phaseolus vulgaris) As A Functional Beverage
Authors: Cornelia Melanie , Lessy Soraya Triesly
Published: January 2018

Indonesia had the big potency to produce red beans and edamame beans, but its utilization regarding functional food was not optimal. This research was intended for development combining red and edamame beans to become a new functional beverage product. The ratio of edamame milk to red bean milk (100:0, 75:25, and 50:50) and cooking temperature 90 oC has been selected based on SNI soymilk. During storage, a phase separation happened. Consequently, stabilizer should be added to improve its stability. Three types of stabilizers were used,CMC 0.1 %, 0.2%, and 0.3 %, xanthan gum (XG), and guar gum (GG) 0.025 %, 0.05 %, and 0.1 %, respectively. The best formulation was milk ratio 75:25 with 90 oC and addition of XG 0.05 %. The dietary fiber analysis for milk formulation was 4.46 % therefore it was categorized as a functional beverage.
Pengaruh Methanol Terhadap Torsi, Daya Epektif Dan Komsumsi Bahan Bakar Spesifik Epektif Pada Mesin Daihatsu Ferosa 1994
Authors: Adi Sayoga I Made
Published: January 2018

The research of the effect of methanol to the Torque, power effective and specific fuel consumption effective  at Daihatsu Ferosa machine 1994 had been done. The research had done in mechanical engineering laboratory, engineering faculty mataram University.                The percentage of methanol and premium  was varied each 0%, 5%, 10%,15%and 20% methanol. Each fuel was tested at wide open throttle (WOT) at fourth transmission 1600rpm, 2100 rpm, 2600 rpm and 3600 rpm. The data that got in the experiment was analysis and calculated to find torque, effective power and specific fuel consumption effective.                The result shown that at the higher percentage of methanol torque and power effective decrease gradually. Therefore the specific fuel consumption effective increase at the higher percentage of methanol.
Analisa Delaminasi Pada Glass Fiber Reinforced Polymer Komposit Laminat Dengan Pembebanan Fatigue
Authors: Astika I Made
Published: January 2018

Delaminasi merupakan salah satu dari model kerusakan kritis yang terjadi pada komposit laminat. Delaminasi terjadi karena beberapa faktor seperti tegangan interlaminar yang tinggi dan konsentrasi tegangan pada lokasi retak atau kerusakan lain pada laminat. Jika suatu laminat diberi beban fatigue, delaminasi dapat tumbuh dengan kenaikan jumlah cycle dan bisa menyebabkan kerusakan total pada laminat. Jadi ada keterkaitan antara karakteristik pertumbuhan delaminasi komposit laminat dengan kondisi pembebanan fatigue. Pada penelitian ini diamati pertumbuhan delaminasi pada komposit laminat yang didasarkan pada perhitungan kemungkinan pertumbuhan delaminasi pada semua tingkat pembebanan selama siklus pembebanan fatigue.Penelitian ini adalah pengujian fatigue dengan pembebanan reverse bending dengan type specimen double cantilever beam (DCB). Pembuatan spesimen uji dilakukan dengan proses hand lay up dengan menggunakan dua lembar lamina berserat anyam (WR). Diantara kedua lamina disisipi dengan lembaran aluminium dengan ukuran 25 x 75 mm sebagai inisiasi retak. Ukuran specimen adalah 25 x 230 mm.Hasil penelitian menunjukkan bahwa laju perambatan retak mengalami penurunan pada jumlah siklus yang meningkat. Bertambahnya siklus mengakibatkan faktor intensitas tegangan (KI) dan energi yang dibebaskan (GI) mengalami penurunan. Berkurangnya energi yang dibebaskan dan faktor intensitas tegangan berpengaruh pada distribusi tegangan pada ujung retakan mengakibatkan laju pertambahan retak menurun.
PENGARUHORIENTASI DANFRAKSI VOLUME SERAT DAUN NANAS (ANANAS COMOSUS)TERHADAP KEKUATAN TARIK KOMPOSIT POLYESTERTAK JENUH(UP)
Authors: Setyawan Paryanto Dwi , Sari Nasmi Herlina , Pertama Putra Dewa Gede
Published: January 2018

Composite manufacturing is done by hand lay-up method with a fiber volume fraction 10%, 20%, 30%, and 40% with unidirectional and random short fiber orientation of pineapple leaves. Specimen testing is performed with a standard tensile strength test ASTM D3039. As a results is known that the tensile strength of composites increased with increasing fiber volume fraction for unidirectional fiber orientation, but rather to the random orientation of short fibers. Meanwhile, the composite tensile strain increases withincreasingfibervolume fractionfor both theorientation of thefibersof pineappleleaves.
Analisa Pengaruh Variasi Merek Kampas Rem Tromol Dan Kecepatan Sepeda Motor Honda Supra X125 Terhadap Keausan Kampas Rem
Authors: Multazam Ahmad , Zainuri Achmad , Sujita S.
Published: January 2018

AbstractBrake is one component of a motor vehicle that serves to slow or stop the study aims to determine the value of the wear of each brand of brake drum caused by variations in the speed of the motorcycle Honda Supra X125 on the braking load 6 kg. Brake that is used in this study there are three variations of the brand is a brand HONDA GENUINE PART, ASPIRA, and KOMACHI with variations at 40, 50 and 60 km / h and braking load 6 kg. The research was conducted in two phases, namely the field of testing and measuring brake wear in the lab. Metrology using a profile projector, in addition to the Rockwell hardness testing is also performed to determine the hardness of each brand of brake lining before and after testing higher speeds with the same braking load time, braking distance and the wear rate also increased.From the research results smallest brake lining wear occurs there at a speed of 40 km / h and braking load 6 kg. Genuine Parts for the Honda brand it wear amounted to 1.574 x 10 -5 mm / sec, while the brand Aspira it wear 8.47 x 10 -5 mm / sec and brands Komachi it wear 3.500 x 10 -5 mm / sec. Largest brake wear occurs at a speed of 60 km / h and braking load 6 kg. Genuine Parts for the Honda brand is equal to 2.373 x 10 -5 mm / sec, while the brand Aspira it wear 3.626 x 10 -5 mm / sec and brands Komachi it wear 3.701 x 10 -5 mm / sec.
Analisa Traksi Untuk Kendaraan Truk Angkutan Barang Jalur Denpasar-Gilimanuk
Authors: Chatur Adhi IGAK , Komaladewi AAIA Sri , Atmika IKetut Adi , Suriadi IGAK
Published: January 2018

Road condition and plain all of the line traffic  Denpasar- Gilimanuk have many slope upward. Beside of many slope upward declivity and long slope upward have many variation too. We must give many attention for that condition in design minimum power engine to vehicle truck,beside the other factors like wind velocity , kind of asphalt , curves ,etc.            The purpose of this research to recite road condition (slope upward , wind velocity ,density) all of the line traffic Denpasar – Gilimanuk,and then will be count minimum traction need of vehicle truck that across that road.            From this research result obtained that the needed traction to overcome all resistance especially slope upward resistance are 6000 N and the estimate needed power about 220 hp from characteristic power torsi.
ANALISIS SIFAT KEKUATAN TARIK DAN KEKUATAN BENDING KOMPOSIT HIBRYD SERAT LIDAH MERTUA DAN KARUNG GONI DENGAN FILLER ABU SEKAM PADI 5% BERMATRIK EPOXY
Authors: Muslim Jauhari , Sari Nasmi Herlina , Sulistyowati Emmy Dyah
Published: January 2018

Abstract The use of composite materials is growing at over the development of manufacturing industry. Composites sansevieria and hibiscus canabinus with the addition of rice husk ash filler. The purpose of this study was to analyze the tensile strength and bending strength of hybrid composites sansevieria and hybiscus canabinus with rice husk ash filler epoxy bermatrik with random fiber direction.Variation of fiber volume fraction sansevieria and hybicus canabinus is 0%:35%,10%:25%, 15%:10%, 20%:15%, 25%:10%, 35%:0%. Method for making composite specimens in the form of hand lay up with a fiber length of 2cm. Testing was done by bending test following the ASTM standard D790 tensile test and ASTM D3039 standards.The results showed that the composites with rice husk ash fillers higher bending strength and the strength of its appeal compared to the composite without using rice husk ash fillers, where the highest bending strength on volume fraction 0%/35% as big as 32,00 MPa (using filler), and kekutan lowest bending the volume fraction 0%/35% as big as 21, 69 Mpa (without filler). While the tensile test has the highest power in the volume fraction 15%/20% as big as 8,24 MPa (using filler), and the lowest tensile strength on volume fraction 0%/35%  as big as 3,43 MPa (without filler).
ANALISIS UJI PENYERAPAN AIR DAN STRUKTUR MIKRO KOMPOSIT LAMINATE HYBRID SERAT SISAL DAN BATANG PISANG DENGAN MATRIK EPOXY
Authors: Artha Sastra I Putu Krishna , Sari Nasmi Herlina , Sujita S.
Published: January 2018

The purpose of this study is to investigate and analyze about absorption properties of the composite laminate, microstructure hybrid sisal and banana fiber with epoxy matrix. Composite manufacturing was done by hand lay-up method with a ratio of fiber volume fraction of sisal and banana trunks 0:40, 10:30, 15:25, 20:20, 30:10, 40:0 (%) With direction of sisalana agave fiber orientation and banana fiber by fiber length according to the mold. Specimen testing was done by the water absorption test with the standard ASTM D571-8,. Test results obtained from the average water absorption properties of composites with the highest ratio of fiber volume fraction of 40%: 0% is 42.4% while the lowest average water absorption properties contained in the composite with fiber volume fraction of 0%: 40%, with percentage of 11.5%. Therefore we can conclude the increasing volume fraction of sisal fiber withidirection of  fiber orientation, the lower of water absorption properties and conversely increasing the volume of woven banana fiber orientation, the higher of water absorptionproperties.
ANALISIS SIFAT KEKUATAN IMPACT KOMPOSIT SANDWICH PLASTIK BEKAS DIPERKUAT SERAT SISAL DENGAN CORE BONGGOL JAGUNG
Authors: Sari Nasmi Herlina , Sulistyowati Emmy Dyah , Dirjan M. Wirya
Published: January 2018

Komposit merupakan suatu struktur material yang tersusun dari dua kombinasi atau lebih konstituen yang dikombinasikan secara makroskopik yang mana keduanya tidak saling melarutkan. Penelitian ini bertujuan untuk mengetahui sifat kekuatan impact komposit sandwich plastik bekas diperkuat serat sisal dengan core bonggol jagung. Metodologi penelitian mengacu pada pengujian dilakukan yaitu  pengujian impact sesuai dengan standar ASTM D-5942 dengan impak Charpy yaitu dengan memvariasikan persentase volume serat sisal (5%, 10%,  15%, 20%, 25%, dan 30%) dan variasi arah serat sisal yaitu acak dan searah.Hasil penelitian ini menunjukkan bahwa dan kekuatan impact komposit sandwich plastik bekas yang diperkuat serat sisal dengan core bonggol jagung cenderung mengalami peningkatan seiring dengan penambahan presentase serat. Kekuatan impact tertinggi pada fraksi volume serat sisal (30%) sebesar 0,0460 J/mm2­ dengan arah serat acak dan terendah pada variasi volume serat sisal (5%) dengan arah serat searah sebesar 0,019 J/mm2­. Rata-rata pada arah serat searah lebih besar dibandingkan dengan arah serat acak, sedangkan Rata-rata kekuatan impact  lebih besar pada arah serat acak dibandingan dengan arah serat searah.
Sampaul Dinamika Teknik Mesin January 2014
Authors: Dinamika Dinamika
Published: January 2018

Sampaul Dinamika Teknik Mesin January 2014
EFFECT OF TUBE DIAMETER AND SURFACE ROUGHNESS ON FLUID FLOW FRICTION FACTOR
Authors: Mirmanto M. , Yudhyadi IGNK , Sulistyowati Emmy Dyah
Published: January 2018

Experiments have been performed to investigate the effect of channel roughness and diameter on fluid friction. Three different diameters and roughness of tubes were used to examine the friction factor. The first tube made of stainless steel with an inner diameter of 1.14 mm was investigated at Brunel University, whilst the others made of PVC with diameters of 17 mm and 15.5 mm rough were tested at Mataram University. The stainless steel was equipped with a 200 mm calming section and smooth one. The 15.5 mm diameter tube was coated internally with sand that had an average grain size of 0.5 mm so that the tube had a relative roughness of 0.032.  The last tube with a diameter of 17 mm was smooth as explained  in the H408 Fluid Friction Experimental Apparatus manual.            The results indicate that the flow in the stainless steel tube still obeys the theory and in the 17 mm tube shows a deviation in friction factor with the theory. However, this was due to no calming section installed in the test rig. Flow in the rough tube (15.5 mm diameter) demonstrates that the Reynolds number does not affect the friction factor in turbulent regimes and the experimental friction factors were reasonably in a good agreement with the theory or Moody diagram. Hence, the effect of decreasing in diameter of channels on friction factor is insignificant.
PENGARUH KADAR AIR AWAL KAYU JATI DAN SUHU CURING PEREKAT PADA KEKUATAN GESER SAMBUNGAN KAYU JATI (TECTONA GRANDIS) SECARA PEREKATAN
Authors: Sugiman Sugiman , Hayyi Nu’man Abdul , Sulistyowati Emmy Dyah
Published: January 2018

Adhesively wood-wood bonded joint has been widely used in structural applications, however because wood is a hygroscopic material that absorbed water from environment, hence the absorbed water affects the joints performance. The objective of the paper is to investigate water absorbtion and desorbtion behaviour and the combined effect of absorbed water into the wood before being bonded and adhesive curing temperature on the shear strength of teak wood joints. The initial water content in the wood was 0%, 37%, and 54%, while the curing temperature was a  room temperature for 24 hours, 50°C for 6 hours, and 100°C for 3 hours. The water absorbtion behaviour of teak wood deviate from the Fick's law, however the desorbtion tends to follow the Fick's law. Moreover the rate of absorbtion is higher than the rate of desorbtion. At the same curing temperature, the increase of water content decreases the shear strength of the joints; however the decrease was compensated by increasing the curing temperature. Curing at a high temperature (100 oC) improves the joints strength in all moisture content studied and the failure of the joints occurs at the wood.
Dinamika Teknik Mesin vol 4 no 2 Juli 2014
Authors: Dinamika Dinamika
Published: January 2018

Dinamika Teknik Mesin vol 4 no 2 Juli 2014
PENERAPAN IPTEK BIOGAS “MENUJU KONSEP DESA MANDIRI ENERGY-DME” DI DESA RARANG LOMBOK TIMUR
Authors: Mara I Made , Suartika I Made
Published: January 2018

The implementation of science and communities service project is aimed to minimize destitution by implementing self feeding and energy generating village concept. The specific goal of this project is the utilization of cattle dung to produce a biogas. The method is being used for this project is by illuminating and educating the community to be able to build and operate the cattle dung biogas digester by their own. In addition, the community is completely involved to this project since the early state of this project. By implementing the plastic floating digester, it is hoped that the communities be able to utilize the biogas digester and make their own domestic energy. The result of this program is an unit biogas digester by using cow dung as a feed stock. The plastic floating digester can produce a continue biogas as a fuel for cooking. The enthusiasm of the community in term of using and implementing the digester is quite high. It is expected that the community can build and implement the cattle dung digester to produce biogas as a domestic energy.
KARAKTERISTIK KEKUATAN BENDING DAN KEKUATAN TEKAN KOMPOSIT SERAT HYBRID KAPAS/GELAS SEBAGAI PENGGANTI PRODUK KAYU
Authors: Harsi Harsi , Sari Nazmi Herlina , Sinarep Sinarep
Published: January 2018

Wood material is very popular in indonesia and all over the world, there are so many people who use it as their buildings contruction and also for their home tools, because the wood material is strong, long lasting, green living, save and lux. On the other hand the wood material will be mouldy if it meets water, thats why this material is not suitable to be placed in humid or wet places we need a new material that can be used as the subtitution of the wood material. The aim of this research is to know about how to make the composite of cotton/glass hybrid fiber and its mecanical using epoxy matrix, and then compare it with wood product. The wood product that used in this research is mahoni.The composite making is using hand lay-up method and the variety fraction volume of cotton fiber and glass fiber are : 30% : 0%, 25% : 5%, 20% : 10%, 15% : 15%, 10% : 20%, 5% : 25%, 0% : 30 %, the epoxy matrix volume fraction is 70 %, where the orientasion of cotton fiber is rondom and 2 cm in lenght, whereas the orientasion of the glass fiber is equally with fiber lenght up to the lenght of mould. The researcher did some test they are: bending test that based on ASTM D 790 standart, compression test that based on ASTM D 695 standart.The bending strenght’s mean of all volume fraction’s varieties of cotton/glass hybrid fiber composite shows the higher bending strenght than the bending strenght of mahoni which is used as the comparator. Afterwards the pressing strenght’s mean of cotton/glass hybrid fiber composite especially in  20%:10% and 0%:30% fraction volume varieties, which is have the values orderly 37,74 MPa and 47,53 MPa, and it shows the higher pressing strenght than the pressing strenght of mahoni, it is 36,78 MPa. Based on the recearch that have been done we can conclude that the characteristic of mechamical cotton/glass hybrid fiber composite can be used as the (alternative) wood subtitution especially mahoni.
PENGARUH VARIASI KUAT ARUS LISTRIK DAN WAKTU PROSES ELECTROPLATING TERHADAP KEKUATAN TARIK, KEKERASAN DAN KETEBALAN LAPISAN PADA BAJA KARBON RENDAH DENGAN KROM
Authors: Darmawan D.P Arif Surya , Ketut Okariawan I Dewa , Sari Nasmi Herlina
Published: January 2018

The usage of carbon steel at present is growing rapidly. The carbon steel is commonly used in the machining appliance and material construction, as well as oil or gas piping. Improvement of physical properties of steel can be performed by electroplating. The goal of this research was to prove the influence variation of strong electric current and processing time electroplating tensile strength, hardness and layer thickness on low carbon steel with chrome. The benefits of this research is to gain the information about a strong in fluence of electric current and time again sthardness and thickness of thetensile strength of low carbon steel with chrome plating.This research using low carbon steel coated by electroplating method with variations strong electric current 17.8A, 22.7A and 27.3A, and the length of processing 5, 10, and 15 minutes. The type of testing which done are to test the thickness, the hardness and tensile test. The processing of data were analyzed using analysis of variance two-way.Thickness layer of chrome increased along with increasing strong currents and the length of time coating. The highest value of the thickness chrome layer with strong currents occur in the calculation of 27.3A and with in 15 minutes of 0.00015 as well as microscope observation of 0.483 where there is a difference between calculation and observation microscope 400X magnification ranges from 99.9%. The highest hardness values obtained with strong currents 27,3A and within 15 minutes of 23,58 VHN  or 12,621% harder  compare with raw materials. For tensile test itself was increasing tensile strength with the highest value of 627.8 N / mm2 or 6.65% more than raw material.
ANALISIS KEAUSAN DAN WAKTU PENGEREMAN KAMPAS CAKRAM ASBESTOS DAN NON ASBESTOS DENGAN VARIASI BEBAN PENGEREMAN DAN BERAT PENGENDARA PADA SEPEDA MOTOR HONDA SUPRA X 125 CC
Authors: Ali Mulahela Sayid Khaidir , Catur Agus Dwi , Pandiatmi Pandri
Published: January 2018

Brake system is an important thing of vehicle. Many kinds of brake pads presents by each factory. Brake pads made of asbestos and non asbestos material. Each of them have excess and lack. This research aims to know the performance of each type of brake pads so that it can show the excess and lack of each type of product. As user, we have to choose a product which will be used in our vehicle cleverly.The research be done by giving variations in load of brake and weight of rider at a constant speed. The load of brake used spring with the variation are 2 kg, 3 kg and 4kg. While, weight rider are varied with 54 kg and 111 kg.Research result shows that increasing load of pull brake led to increasing the value of worn out and a decline in the braking time, while increasing weight of the rider causes an increase in the value of worn out and braking time at all types of brake pad products. In dry condition, the lowest wear is 1,37x10-4 mm/second in non asbestos pads and the highest wear is 3,088x10-5 mm/second in asbestos pads. While, the smallest braking time is 28,79 seconds in asbestos pads and the biggest is 64,26 seconds in non asbestos pads. In wet condition, the lowest wear is 2,422x10-5 mm/second in asbestos pads and the highest wear is 7,716x10-5mm/second in non asbestos pads. While, the smallest braking time is 29,46 seconds in non asbestos pads and the biggest is 62,71 seconds in asbestos pads.
PENGARUH VARIASI SUSUNAN PIPA TERHADAP LAJU PELEPASAN KALOR PADA KOLEKTOR SURYA ABSORBER BATU GRANIT
Authors: Mirmanto Mirmanto , Wirawan Made , Tira Hendry Sakke
Published: January 2018

As the fossil energy gradually gets depletion, alternative energies should be utilized.  One of alternative energies, which is easier to be used, is solar energy. In this research, the solar energy, which was captured using a flat plate collector with a granite absorber, was used to heat water. The overall dimension of the collector was 0,8 m x 1 m x 0,01 m with a gap between the glas cover and the absorber of approximately 50 mm. Copper pipes with a diameter of 1/2 inch were used to transfer the heat to the water. The volumetric rates of the water were 200 cc / min, 250 cc / min and 300 cc / min and the water was flowed naturally from a higher water tank and was adjusted using a valve installed at the outlet of the collector.The test results indicate that the energy absorbed by the water decreases with the observation time. The parallel pipes cause quick heat removals from the granite absorber. Energy absorbed by the water in the parallel pipes is much greater than that in the serpentine pipe, and the granite can be used for storing the heat energy
Peluang dan tantangan aplikasi baut tulang mampu terdegradasi berbasis logam magnesium
Authors: Hermanto A. , Burhanudin Y. , Sukmana I.
Published: January 2018

This paper reviews the potential and challenges for the application of biodegradable bone screw materials. Currently, in the field of medical sciences and biomedical engineering devices, a non-degradable bone screw is the most acceptable concept to repair a bone fracture. However, with the new intervention and development of advanced materials, either in polymer-based or metallic-based, opens a possibility to use a degradable bone screw. Magnesium-based material is one of the most promising candidates for biodegradable bone screw application, which is the main focus of this paper. Casting technologies for producing magnesium alloys will also highlighted.
Turbin angin poros vertikal tipe Savonius bertingkat dengan variasi posisi sudut
Authors: Alit I.B. , Nurchayati Nurchayati , Pamuji S.H.
Published: January 2018

Wind turbine is a technology that converts wind energy to electric power. A Savonius type rotor blade is a simple wind turbine that operates on the concept of drag. The turbine has a potential to be developed as it has a simple construction and it is suitable for low wind speeds. Savonius rotor can be designed with two or three blades in single level or multi-levels. This research was conducted to obtain two levels wind turbine performance characteristics with variations in wind speed and different positions of angle on each level. The variations of the angle position of the wind turbine were 0°, 30°, 45°, 60°, and 90° in each stage. The result shows that the performance of the wind turbine is inversely to the degree of the angle position. The maximum rotation speed of the rotor was about 150.6 rpm that was generated at the wind speed of 5 m/s and the angle position of 0°.
Studi kelayakan proses pembubutan penekan kopling sepeda motor dengan mesin boxford cnc menggunakan pendekatan statistical process control
Authors: Yudhyadi I GNK. , Wijana M. , Yasa I Ketut Sedana , Sayoga I Made Adi
Published: January 2018

Now days, a company has been experiencing and facing a tight competitive siege. To be surviving within this competition, the company must be creative in developing new and robust ideas to improve their business competitiveness which differentiate them from the others. The product quality was the main issues among others. The quality of a product that offered to the consumers must be cheap and have met with consumer satisfaction. Exploring these ideas, current research has conducted with the main goal was investigating the quality of product produced on CNC Turning. The quality was calculated with a Statistical Process Control (SPC) analysis. Meanwhile, ductile iron workpieces size of 130 mm in length and 19 mm in diameter were manufactured for the samples. The data gathered including diameter, length, and thickness of the samples measured with Digital Vernier Caliper and Micrometer. Based on data observed, the result of experiment shows that the quality of sample products produced in single run (12 products) has met with basic standard requirement with which all samples dimension was lay inside the control limit (Upper and Lower Control Limit (UCL and LCL). It can be concluded that each variable still in process control and was ready for the automation.
Pengaruh jumlah sekat vertikal dan debit aliran terhadap viskositas oli pada separator air oli
Authors: Qiram I.
Published: January 2018

Water pollution is a major environment problem. Oil water separator can be used to solve this problem. This research is aimed to get the effect of vertical divider number and fluid flow rate due to oil viscosity. The research is done by experiment using gravity separator. Vertical dividers are varied as 5 and 7. Fluid flow rate is vary as 176,5; 106,6; 53,7 and 33,7 ml/s. Oil 0,5 litre is mixture with 10 litres of water. Oil viscosity is measured with simple flow gravity method. The data is analized statistically using SPSS 17.0. The result shows that vertical divider number and fluid flow rate have effect on oil viscosity.
Pengaruh kecepatan udara dan massa gabah terhadap kecepatan pengeringan gabah menggunakan pengering terfluidisasi
Authors: Syahrul S. , Mirmanto M. , Romdani S. , Sukmawaty S.
Published: January 2018

Grain processing does not meet the actual grain harvests. This is due to the unsuitable drying process. Milling grain entrepreneurs and farmers in Indonesia are currently conducting a drying process under the sun. Based on the National Standards Body (BSN), grain moisture content must be at 14% to maintain the grain at high qualities. The purpose of this study is to determine the effect of velocity and grain mass variations on drying times. The grain used in this study contains an initial moisture content of 22% ± 0.5%. The grain is dried by inserting it into the drying chamber and varying the air velocities and grain mass. The air velocities used are 4 m/s, 5 m/s, 6 m/s and the variations of the grain mass are 1 kg 2 kg and 3 kg. The results show that increasing the air velocity decreases the drying time. On the other hand, when the grain mass is increased, the drying time elevates. The air velocity and mass of the grain that results in the fastest drying time are 6 m/s and 2 kg. The time required for achieving the water content of 13.6% is 30 menit. At the air velocity of 4 m/s, and the grain masses of 1 kg, 2 kg, and 3 kg, to achieve moisture contents of 13.4%, 13.5% and 13.4% the drying time needs 50 minutes.
Penerapan IPTEKS pada usaha Handycraft Ketak berorientasi Ekspor di desa Karang Bayan Kecamatan Lingsar Kabupaten Lombok Barat
Authors: Triadi A.A.A. , Nuarsa M. , Bisma DG.
Published: January 2018

Products Woven or ketak is a handicraft product produced by the ‘artisans’ community in the village of Karang Bayan West Lombok with raw materials from plants ketak. In the process it takes the necessary skills to weave and combine woven ketak with other natural products such as wood, pottery, coconut shell or bone. The marketing of wicker web products has penetrated the export market, especially the Japanese market. Problems experienced by industrial partners or the artisan’s community is the transfer of design from businessmen to crafters (door to door), drying process during the rainy season and business management. Designs are sometimes made by the buyer and sent to the entrepreneur via email. The solving problem that is faced by the producents is the important thing to be done, by approaching the centralized design transfer training (in one place that is done in the partner house).  The next one, making a mechanical dryer with two heat sources located beside left and lower right and LPG-fueled (clean, practical, economical and environmentally friendly). Next step, by providing business management assistance (finance and marketing).
Pemanfaatan limbah piston bekas sebagai filler metal aluminium pada pengelasan oxy-acetylene
Authors: Nurisna Z.
Published: January 2018

The abundance of waste piston used so far has not been utilized properly. Users of this piston waste can be used as an oxy-acetylene welder filler. Las oxy-acetylene has been widely used for welding on various types of aluminum product repair, one of which is welding machine block. Machine blocks in their use often suffered damage to the cooling water circulation path and broken crack and broken. Welders and repair shops that repair these damages do not have standardized standards in the use of weld fillers, but they do filler selection based solely on experience including in determining the weld filler. The purpose of this research is to know the effect of piston waste which is used as raw material of weld filler to tensile strength and hardness of welded block result of machine using oxy-acetylene welding. Welding is done by an experienced welder. The welding results are tested for tensile strength and hardness distribution test. The welded joint with the chemical composition of filler which is almost equal to base metal has the highest tensile strength. The tensile strength of the welded joint tension test is in the weld metal region due to defects in the weld metal, especially the porosity defects that are formed during the welding process so that the tensile test loading is concentrated on the defect. While the highest hardness on the weld is in the filler metal with the highest percentage of Si content.
Studi eksperimental terhadap porositas dan hambat alir udara pada komposit penyerap suara
Authors: Sari Nasmi Herlina , Fajrin Jauhar , Yudhyadi IGNK
Published: January 2018

In this paper, we present a comprehensive analytical and experimental investigation for the determination of the air flow resistivity and porosity of sound absorber composite. The ratio of the volume fraction of fiber and polyester resin is 15, 25, 35, 55 and 65 (%).The dimensions of the absorbent composite sample are 29 mm x 20 cm (diameter x thickness). Porosity and Air flow resistivity of composites have been investigated. The results showed that the porosity of the composites increased with increasing amount of fiber due to the interface between fiber and resinless dense. In contrast, the air flow resistivity values are lower with a denser resin and fiber interface.
Pengaruh sudut alur sekat terhadap unjuk kerja menara pendingin (cooling tower)
Authors: Ardani A. , Qiram I. , Rubiono Gatut
Published: January 2018

Cooling tower is an equipment that use to decrease water temperature by extracting heat and emitting it to atmosphere. Cooling tower buffle is an important component that effect water flow. This research is aimed to get the effect of cooling tower buffle due to its performance which are range, heat transfer rate and efficiency. The research is done by experiment. Cooling tower buffle are varied in plot angle which are 5o, 10o, 15o dan 20o. Water volume flow rate are varied as 50, 75, 100 and 125 ml/s. Inlet water tempersatur are varied as 50o, 60o and 70oC. The measurements are done for water and air temperature at inlet and outlet points. The result shows that buffle plot angle has effect due to cooling tower performance.
PENGARUH TEMPERATUR KALSINASI DAN SUBSITUSI LOGAM NIKEL PADA PEMBENTUKAN FASA BARIUM M-HEXAFERRITTE (BaFe12-xNixO19) MENGGUNAKAN FTIR
Authors: Susilawati Susilawati , Munib Munib , Doyan Aris
Published: January 2018

Abstrak: Sintesis Barium M-Hexaferrite (BaFe12-xNixO19) doping logam nikel telah dilakukan dengan metode korpresipitasi dan efeknya terhadap perubahan temperatur dan subsitusi dopan. Bahan dasar yang digunakan dalam sintesis BaCO3, FeCl3.6H2O dan logam nikel. Dalam penelitian ini digunakan variasi temperatur kalsinasi 80, 400, 600 dan 800ÃÂ°C selama 4 jam dengan variasi dopan 0; 0,4; 0,7 dan 0,9. Hasil sintesis dikarakterisasi dengan FTIR (Fourier Transform Infra Red Spectroscopy) merek Shimidzu tipe 8400 s. Hasil pembentuka fasa dari barium M-hexaferrite (BaFe12-xNixO19) diketahui melalui data FTIR seiring dengan meningkatkan temperatur kalsinasi yang digunakan diperoleh puncak yang muncul pada rentang bilangan gelombang 800 - 1650 cm-1 semakin sedikit, sehingga pembentukan fasa barium M-hexaferrite yang signifikan terbentuk pada temperatur kalsinasi 800 ÃÂ°C dan pada variasi dopan 0,7.Kata kunci:ÃÂ ÃÂ  Temperatur, dopan, barium M-hexaferrite, kopresipitasiÃÂ Abstract: Synthesis of Barium M-Hexaferrite (BaFe12-xNixO19) nickel metal doping have been done with co-precipitation method and its effect on temperature changes and substitution dopants. Basic materials used in the synthesis of BaCO3, FeCl3.6H2O and nickel metal. This study used a variation of calcination temperature of 80, 400, 600 and 800ÃÂ°C for 4 hours with a variety of dopants 0; 0.4; 0.7 and 0.9. Synthesized characterized by FTIR (Fourier Transform Infra Red Spectroscopy) Shimidzu brand type 8400 s. Results of the phase formation of barium M-hexaferrite (BaFe12-xNixO19) known through the data FTIR along with increasing the calcination temperatures used were obtained peak appearing in the range of wavenumber 800 to 1650 cm-1 is getting a little bit, so the formation of M-phase barium hexaferrite significant formed at calcination temperature of 800 ÃÂ° C and at variations of dopantÃÂ  0.Key words: temperature, dopant, barium M-hexaferrite, co-precipitation
PENGARUH VARIASI TEMPERATUR KALSINASI TERHADAP BARIUM M-HEKSAFERIT DIDOPING Zn MENGGUNAKAN FOURIER TRANSFORM INFRA RED
Authors: Doyan Aris , Halik Ilham , Susilawati Susilawati
Published: January 2018

Abstrak: Barium M-heksaferit (BaM) merupakan bahan magnet permanen yang tergolong hardmagnetic tetapi tidak sesuai untuk beberapa aplikasi, sehingga perlu dilakukan rekayasa untuk menurunkan sifat kemagnetannya menjadi softmagnetic. Penelitian ini bertujuan untuk mengetahui pengaruh temperatur kalsinasi terhadap barium M-heksaferit didoping Zn menggunakan pengukuran FTIR. Proses sintesis barium M-heksaferit menggunakan metode kopresipitasi dengan memvariasikan konsentrasi dopannya 0,0; 0,3; 0,6; dan 0,9 serta memvariasikan temperatur kalsinasi 80oC, 400oC, 600oC dan 800oC. Setelah melakukan proses sintesis selanjutnya dilakukan pengujian sampel menggunakan FTIR (Fourier Transform Infra Red). Penelitian ini telah berhasil melakukan sintesis dengan hasil berupa serbuk barium M-heksaferit berwarna coklat muda hingga coklat tua. Berdasarkan hasil pengujian FTIR didapatkan puncak-puncak pada bilangan gelombang 3447cm-1, 2345cm-1, 1615cm-1, 530cm-1, 470cm-1 masing-masing mengindikasikan adanya gugus fungsi O-H, Ba-O, Fe-O dan Zn-O pada sampel. Puncak yang timbul pada ikatan O-H semakin mengecil menandakan bahwa ikatan pada gugus fungsi tersebut semakin melemah atau bahkan hilang. Hasil pengujian FTIR tersebut menyatakan bahwa temperatur kalsinasi sangat berpengaruh pada proses sintesis BaM. Semakin tinggi temperatur kalsinasi, bahan pengotor seperti air dan CO pada barium M-heksaferit semakin berkurang, ini menunjukkan barium M-heksaferit yang dihasilkan dapat digunakan sebagai bahan softmagnetic.Kata Kunci: Barium M-Heksaferite, sintesis, kopresipitasi, magnet, FTIRÃÂ Abstract: Barium M-hexaferrite (BaM) is a permanent magnetic material which is relatively hardmagnetic but it is not appropriate for some applications that need to be engineered to degrade the nature ofÃÂ  magnetism to be softmagnetic. This study aims to determine the effect of calcinations temperature on Zn doped BaM using FTIR measurements. Synthesis of BaM using coprecipitation method by varying the concentrate of dopan 0,0; 0,3; 0,6; dan 0,9 and varying the calcinations temperature 80oC, 400oC, 600oC dan 800oC. After synthesis of BaM and than the samples were studied using FTIR (Fourier Transform Infra Red). This study has success to synthesis of BaM and the product is a brown powder. Based on the test result of FTIR has been obtained peaks in wave number 3447cm-1, 2345cm-1, 1615cm-1, 530cm-1, 470cm-1 indicated a functional group O-H, Ba-O, Fe-O dan Zn-O on the powder sample. The peak on O-H shrinking indicates that the bond of functional groups are weakened or even disappear.The result of FTIR said that calcinations temperature has effect to BaM synthesis process. It is found that water and CO decrease with increase in calcinations temperature, it is showed the product BaM can be used to softmagnetic.Key Words : Barium M-Hexaferrites, synthesis, coprecipitasi, magnet, FTIR
OPTIMASI FOTODEGRADASI METIL ORANYE MENGGUNAKAN FOTOKATALIS TiO2/Al2O3 MONTMORILONIT
Authors: Sumarlan Iwan
Published: January 2018

Abstrak: Dispersi TiO2 ke dalam montmorilonit terpilar aluminium (PILM) telah sukses dilakukan. Fotokatalis dibuat dengan menginterkalasikan Al13 ke dalam montmorilonit alam kemudian dikalsinasi pada temperatur 500oC. Dispersi TiO2 ke dalam montmorilonit terpilar aluminium (PILM) dilakukan dengan menggunakan metode impregnasi dengan konsentrasi teoritis 0,4%, 0,8% 1% dan 3%. Fotodegradasi metil oranye optimum diperoleh pada Ti/PILM 1%, pH 10, konsentrasi metil oranye 1,5 M dan konsentrasi katalis 1 gram/liter dengan laju konstanta orde satu sebesar 21,77x10-3 per menit.Kata kunci : Metil Oranye, Montmorilonit,Optimasi, Fotokatalis, TiO2Abstract: Dispersion of TiO2 on montmorillonite pillared aluminium has been done successfully. The photocatalyst were prepared by intercalation of Al13 onto natural montmorillonite and then calcined at 500oC. Titania dispersion onto aluminium pillared montmorillonite was carried out by impregnation method at the theoritic concentration of 0.4%, 0.8%, 1% and 3% titania. Photodegradation optimum of methyl orange was found to be at Ti/PILM 1%, pH 10, methyl orange concentration 1.5 M and concentration of photocatalyst 1 gram/litre. The photodegradation follows first order reaction with constan rate of 21.77x10-3 per minutes.Key Word: Methyl Orange, Montmorillonite, Optimation, Photocatalyst, TiO2
PENGEMBANGAN PERANGKAT PEMBELAJARAN BERBASIS PENDEKATAN SAINTIFIK MODEL GUIDED DISCOVERY DAN EFETIVITASNYA TERHADAP KEMAMPUAN BERPIKIR KREATIF SISWA SMA NEGERI 1 BAYAN
Authors: Sumiadi Raden , Dyah Jekti Dwi Soelistya , Jamaluddin Jamaluddin
Published: January 2018

Abstrak: Penelitian ini bertujuan untuk mengembangkan perangkat pembelajaran berbasis pendekatan saintifik dengan model guided discovery dan mengetahui efektivitasnya terhadap kemampuan berpikir kreatif siswa. Perangkat pembelajaran yang dikembangkan terdiri dari Silabus, rencana pelaksanaan pembelajaran (RPP), lembar kegiatan discovery siswa (LKDS), buku ajar siswa (BAS), tes penguasaan konsep (TPK), tes berpikir kreatif (TBK). Pengembangan perangkat pembelajaran menggunakan model 4D dari Tiagrajan,ÃÂ  S. Semmel & Semmel yang terdiri dari empat tahap, yaitu tahap define, design, development dan disseminate. ÃÂ Perangkat pembelajaran dikembangkan pada materi sistem pernapasan, hasil pengembangan perangkat pembelajaran selanjutnya dianalisis menggunakan rumus presentase rata-rata dan disesuaikan dengan tabel kriteria validasi. Untuk mengetahui efektivitas perangkat pembelajaran terhadap kemampuan berpikir kreatif siswa, perangkat pembelajaran di ujicoba pada kelompok terbatas di kelas XI IPA 1 dan kelas XI IPA 2 dengan jumlahÃÂ  siswa 47 orang, dan dianalisis menggunakan rumus presentase ketuntasan individu. Kesimpulan hasil penelitian ini antara lain; 1) perangkat pembelajaran yang dikembangkan dikategorikan baik (valid) dan sangat baik (sangat valid) sehingga layak digunakan dalam proses pembelajaran di SMA Negeri 1 Bayan, 2) perangkat pembelajaran efektif dapat meningkatkan kemampuan berpikir kreatif siswa.ÃÂ Kata Kunci: Perangkat Pembelajaran, Pendekatan saintifik, Model guided discovery, Berpikir kreatifAbstract:ÃÂ  The purposes of this research are to develop learning device based on scientific approach with guided discovery and to know the effectiveness of peripheral learning to ability of mastering biological concept and creative thinking ability of student. Learning device of developed study consist of Syllabus, plan execution of study, sheet activity of student discovery, book teach student, domination concept of tes, think creatively tes. Developing learning device uses 4D model from Tiagrajan, S. Semmel & Semmel which consist of four steps: difine, disaign, development, and disseminate. The results of developing peripheral learning analyzed using mean precentage criteria which adapted from criteria validation table. To know the effectiveness of the peripheral to mastery bioligical concept and creatively student think ability, the learning device was tested in class XI IPA 1 and class XI IPA 2 with total 47 students. The result was analyzed using percentage formula of individual mastery. In conclusion 1) the developed learning device was categorized good (valid) and very good (very valid) so that it can be used in learning processes in SMAN Bayan 2) the developed learning device is effective to improve the studentÃ¢â¬â¢s creative thinking.Keywords: learning device, scientific approach, guided discovery, creative thinking.
PENGEMBANGAN MULTIMEDIA INTERAKTIF BERBASIS KONTEKSTUAL UNTUK MENINGKATKAN KETERAMPILAN BERPIKIR KRITIS SISWA KELAS XI PADA MATERI POKOK SISTEM KOLOID
Authors: Surachman Mardhika , - Muntari , Savalas Lalu Rudyat Telly
Published: January 2018

The aims of this study were to: 1) generate interactive multimedia of colloidal system which is suitable to be implemented in schools, and to test the effectiveness of the interactive multimedia by: 2) knowing whether critical thinking skill of students who use context-based interactive multimedia is better than critical thinking skill of students who do not use context-based interactive multimedia on subject matter of the colloidal system. The method used in this study was research and development (R&D) according to the model of Borg & Gall’s development. The results of the expert validation by 4 validators and limited testing by 10 students showed that the interactive multimedia was very suitable to be used, with scores of 4.21 and 4.36 for expert validation and limited testing, respectively. Field trial  using a non-equivalent control group design with 2 class samples, resulted in the critical thinking skill of probability value of 0.00 (p < 0.05). From this research we can conclude that: 1) context-based interactive multimedia can be developed by means of analyzing the materials in each sub materials as the basis for developing primary form of product, then tested for it’s feasibility, effectiveness, and revised through an expert validation, limited field testing, and main field testing, consecutively, so that the resulting product is considered to be suitable for learning process, and 3) critical thinking skill of students who use context-based interactive multimedia is better than critical thinking skill of students who do not use context-based interactive multimedia on the subject matter of the colloidal system. Keywords: interactive multimedia, context learning, concept mastery, critical thinking skill
PENGEMBANGAN PERANGKAT PEMBELAJARAN MODEL 5E UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR KRITIS SISWA
Authors: Nasir Muh , Jufri A. Wahab , - Muhlis
Published: January 2018

This study aims to develop of learning package 5E model and analyze the effect of its implementation on the differences in student’s critical thinking and arguing skills. Development process follows R & D model by Dick and Carey. Research design follows pretest-posttest nonequivalent control group design. The population of this study was tenth graders of SMA 1 Woha Bima. Total population is 350 students from ten class. The sample was selected by simple random sampling technique and 131 students (four class) is obtained. X1 and X2 class are taught using the 5E models, while the X5 and X9 class with EEK models. Expert judgement results meet the criteria for the development of a very good result with an average value of 3.37. The results of experimental studies showed that: there is a difference in students’ critical thinking in the experimental and control group (t = 3,501, p = 0,001).Keywords: 5E Model, Critical Thinking Skills
PENGEMBANGAN ALAT PERAGA KOTAK ENERGI MODEL INKUIRI TERBIMBING (APKEMIT) SEBAGAI PENUNJANG PEMBELAJARAN FISIKA SMA PADA MATERI SUHU DAN KALOR
Authors: Basuki Budiono , Doyan Aris , Harjono Ahmad
Published: January 2018

The purpose of this research is to develop APKEMIT as learning tool for high school physics on temperature and heat concepts. This study used Borg & Gall approach on R & D which includes the step of development, pilot testing, and final testing. In the development stage, five APKEMIT models are produced: PKTSB, PW, PPSTUB, PK, and AB. Pilot testing stage is divided into two phase, limited testing and large scale testing. The first limited testing carried out on 6 eleventh grade science students in SMA 3 Mataram. The second phase carried on 2 groups (12 students) of accelerated tenth graders in SMA Negeri 1 Woha. Large-scale trials given to 8 groups (46 students) of tenth graders in SMA Negeri 3 Mataram. Pilot testing shows that APKEMIT is very good and ready to be used in learning activity. APKEMIT final testing stage is the stage to determine the effect of APKEMIT on the improvement of learning outcomes, which is determined by the Gain Score. Analysis shows that the gain of each model is: PKTSB Score of 0.50 (medium), PW of 0.15 (low), PPSTUB of 0.40 (medium), PK at 12:27 (low), AB of 0.34 (medium) and overall Gain Score at 0:36 (medium). This development received good response from the students with score 80.8% and according to observers, learning process has been going very well. The result of research  and validation of test show that the developed APKEMIT become as references in subject temperature and heats concepts.