Pengaruh Elektrolisis Terhadap Rendemen Minyak Jarak Yang Dihasilkan Pada Proses Pembuatan Biodiesel

The use of jatropha oil as a source of raw material for making biodiesel is needed in order to decrease the production cost of biodiesel, since jatropha oil is categorized as non edible fat. In this research, the biodiesel production process by using an electrochemical reactor has been done. At the beginning of treatment, carried out the hydrolysis of oil by using HrS04 with acid and oil volume ratio is 1: 20. At follow-up treatment, carried out the decarboxylation via electrolysis. This process is done by varying the voltage of 0 V, 10 V,20 V,30 V,the variation of the concentration of 0.5 M acetic acid. 1 M, 1.5 M, as well as the distance between the electrodes in the reactor 5em and 10 em. From the experiments shown that electrolysis with voltage parameters, acidic electrolyte solution. and electrode spacing affects the yield of decarboxylation process. Electrolysiswith 1.5 M acetic acid concentration and voltage of 30 volts per cent obtained the highest biodiesel yield of compound that is 70.432% in the reactor with inter-electrode distance of 5cm. While in the reactor with inter-electrode distance of 10 cm. thehighest yield was 53.372% by reacting the oil with 1.5 M acetic acid and voltage 30 Volt

Wireless Sensor Network for Forest Fire Detection

 Forest fires are one of problems that threaten sustainability of the forest. Early prevention system for indications of forest fires is absolutely necessary. The extent of the forest to be one of the problems encountered in the forest condition monitoring. To overcome the problems of forest extent, designed a system of forest fire detection system by adopting the Wireless Sensor Network (WSN) using multiple sensor nodes. Each sensor node has a microcontroller, transmitter/receiver and three sensors. Measurement method is performed by measuring the temperature, flame, the levels of methane, hydrocarbons, and CO2 in some forest area and the combustion of peat in a simulator. From results of measurements of temperature, levels of methane, a hydrocarbon gas and CO2 in an open area indicates there are no signs of fires due to the value of the temperature, methane, hydrocarbon gas, and CO2 is below the measurement in the space simulator

Development of eco-tourism strategy using swot analysis: case study of Bayung Gede village

Bayung Gede Village is one chosen village to be developed as tourism village. However, due to observation result conducted by researcher, Bayung Gede village still has no tourism village development strategy design. This research aims to formulate appropriate strategy to be implemented in Bayung Gede village. Strategy formulation based on SWOT-4K matrices and performed by using TOWS matrices. From the research result, found that Bayung Gede village is in prime condition to expand its market and to develop product also has a lot of opportunities which can be utilized to develop tourism village. By development of Bayung Gede village to be tourism village, it would be able to increase village revenue and welfare

Pengaruh Kepadatan Kendaraan Bermotor terhadap Konsentrasi Karbon Monoksida Ambien (Studi Kasus Jalan Taman Siswa YOGYAKARTA)

Penelitian ini bertujuan untuk mengetahui besarnya konsentrasi karbon monoksida di Jalan Taman Siswa, mengetahui pangaruh kepadatan kendaraan bermotor pada konsentrasi karbon monoksida, dan mengetahui pengaruh faktor meteorologis (suhu, kelembapan, kecepatan angin) terhadap konsentrasi karbon monoksida. Metode yang digunakan dalam pengambilan data penelitian adalah moving observation technique. Penentuan lokasi pengamatan menggunakan metode purposive sampling. Hasil yang diperoleh dari penelitian ini adalah konsentrasi karbon monoksida tertinggi 33 ppm sedangkan yang terkecil sebesar 14 ppm. Konsentrasi masih di bawah baku mutu udara ambien DIY. Kepadatan kendaraan bermotor merupakan variabel yang paling besar pengaruhnya terhadap konsentrasi karbon monoksida. Persamaan regresi dari penelitian ini dihasilkan konsentrasi karbon monoksida = 4,414 + 0,137 (kelembapan udara) + 0,002 (kepadatan kendaraan bermotor)

Pengaruh Lingkungan Organisasi, Kepemimpinan, dan Budaya Organisasi terhadap Kinerja Pencapaian Indeks Kepuasan Pelanggan PT. Angkasa Pura II (Persero)

This research was conducted to analyze the influence of organizational environment, leadership, and organizational culture on the performance of customer satisfaction index achievement. This research is quantitative research with causality approach, population of all employees of PT. Angkasa Pura II (Persero) branch of Soekarno-Hatta Airport with the number of 1923 people. Sampling technique is done by random, determination of sample size using slovin formula with error 10% so that sample is determined counted 95 people. There are four variables used, that is organization environment, leadership, and organizational culture as independent variable and performance achievement index of customer satisfaction PT. Angkasa Pura II (Persero) as a variable r. The collected data were analyzed using multiple linear regression with the help of SPSS version 23 for Windows. The results of this study indicate organizational environment, leadership, and organizational culture significantly positive effect on performance achievement of PT customer satisfaction index. Angkasa Pura II (Persero) at Soekarno-Hatta International Airport Jakarta

Penerapan Metode Pembelajaran Inkuiri Untuk Meningkatkan Hasil Belajar Matematika Siswa Kelas II SD Negeri 005 Lenggadai Hilir

The research carried out base on the lowly of the result of mathematic subject in 2nd grade SDN 005 Lenggadai Hilir which is about 55,25 within minimal completeness criterion stated is 65. The subject of this research is 2nd grade students of SDN 005 Lenggadai Hilir which is total of 20 students, consisted of 10 boys and 10 girls. This was a classroom action research which has two cycles which was conducted on March 23rd to April 2nd 2015. The purpose of this research is to improve student's achievement on mathematics of the 2nd grade student SDN 005 Lenggadai Hilir with the application of inquiry learning method. Instruments for collecting data are teacher' and students' observation sheets and test. The data shown that either learning process or students' achievement increased. This was seen from students' and teacher's scores in learning process increased. First cycle at the first meeting teacher's activity was 66,66% categorized as enough and increased at the second meeting became 79,16% categorized as good. Meanwhile at the second cycle at the first meeting the percentage of teacher's activity increased as 83,33% categorized as good and at the second meeting it increased became 91,66% categorized as very good. While students activities in learning process also increased. At the first cycle at the first meeting students activities was 62,5% categorized as enough and increased at the second meeting became 75% categorized as good. Meanwhile at the second cycle at the first meeting the percentage of students activities increased as 79,16% categorized as good and at the second meeting it increased became 91,66% categorized as very good. The average of student' achievement on basic score was 55,25, UH 1 was 64,5 and UH 2 was 78,75. From basic score to UH 1 incresed 16,74%, and from UH 1 to UH 2 increased again became 22,09%. However, the ending of daily examination was 85%. Based on the result it can be concluded that impementation learning through inquiry learning method increased learning process and students' achievement on mathematic students 2nd grade of SDN 005 Lenggadai Hilir

Penerapan Model Pembelajaran Pemecahan Masalah untuk Meningkatkan Hasil Belajar Matematika Siswa Kelas V SD Negeri 005 Lenggadai Hilir Kecamatan Rimba Melintang

The bacground of this research is because of the low mathematical learning result of grade V SDN 005 Lenggadai Hilir, Rimba Melintang subdistrict. Students' average score is only 60, meanwhile the minimum completeness criteria (KKM) is 65. From 27 students, there are only 12 students that could achieve KKM. This research is the classroom action research (PTK) that has purpose to increase the matematical learning result of grade V SD Negeri 005 Lenggadai Hilir through the application of problem solving learning model. Instruments to collect the data in this research are teacher's activities, students' activites and students' learning results. The results show that there is an increase students' average score from 60 to 75,5 in the test of cycle I, and increases to 89,60 with 89,9% classical completeness. The average score of students' activity in the first cycle is 75,2% with good category, increases into 85,2% also with good category in the second cycle. It is similar to students' activity that is 75% with good category in the first cycle, and increases into 87,5% also with good category in second cycle. Based on this result it can be concluded the the application of problem solving learning model can increase mathematical learning result of grade V SDN 005 Lenggadai Hilir

Pengaturan Subsidi Perikanan dalam WTO dan Dampaknya Bagi Indonesia

Fisheries subsidies have been practiced by many states in the world. Such actions are considered as one of the causes of over-fishing. Its also endanger sustainable fisheries management. There is no specific regulation on fisheries subsidies in the WTO. To date, negotiation over fisheries subsidies came out with the draft and it would be attach as Annexes VIII of SCM Agreement. The draft of fisheries subsidies specifically regulates prohibited subsidies, general exception and special and different treatment. The impact of the WTO fisheries subsidies draft will be negative to the Indonesian fisheries market, fishery resources and employment. Subsidi perikanan telah dipraktikkan oleh negara-negara di dunia. Tindakan tersebut dianggap sebagai salah satu penyebab terjadinya eksploitasi sumber daya perikanan sehingga membahayakan pengelolaan perikanan berkelanjutan. Terkait dengan perdagangan dan subsidi perikanan, belum ada regulasi khusus tentang subsidi perikanan di WTO. Negosiasi di WTO hingga saat ini baru pada rancangan yang akan menjadi lampiran VIII SCM Agreement. Rancangan subsidi perikanan di WTO mengatur secara khusus tentang subsidi perikanan yang dilarang dan pengecualian secara umum. Dampak dari rancangan subsidi perikanan WTO tersebut apabila berhasil disahkan akan memberikan dampak negatif kepada Indonesia terkait dengan pasar perikanan, sumber daya perikanan dan lapangan pekerjaan

Efektifitas Perendaman Ekstrak Jeruk Nipis (Citrus Aurantifolia) Terhadap Kualitas Teh Alga Coklat (Sargassum Filipendula)

Indonesia merupakan negara kepulauan yang memiliki rumput laut yang melimpah, salah satunya adalah alga coklat (Sargassum filipendula). Di dalam alga coklat memiliki beberapa kandungan seperti protein, karbohidrat, lemak, mineral dan unsur lain yang bermanfaat bagi tubuh manusia. Tujuan dari penelitian ini adalah untuk mengetahui kualitas teh alga coklat setelah pemberian ektrak jeruk nipis. Metode yang digunakan dalam penelitian ini adalah metode eksperimen menggunakan perbandingan pH 2, 3, 4, 5 dan 6. Dari hasil penelitian diketahui bahwa perendaman terbaik dari ekstrak jeruk nipis yaitu pada pH 2, dengan nilai pH 4,17, kadar protein 5,97%, kadar lemak 0,48%, kadar abu 9,24%, kadar air 7,33%, intensitas warna L 42,23, warna a* 9,53, warna b* 15,65, kadar logam Pb 0,43 ppm/gr, logam Hg 0,19 ppm/gr, logam Cd 0,26 ppm/gr, nilai organoleptik rasa sebesar 2,10, aroma 2,35, warna 2,10. Sedangkan untuk perhitungan mikroba pada TPC sebesar 4,84x105 cfu/gr, E.coli 3,96x105 cfu/gr dan kapang sejumlah 4,84x105 cfu/gr