Rancang Bangun Mesin Pembangkit Listrik tanpa Bbm Berkapasitas 3000 Watt dengan Memanfaatkan Putaran Flywheel

Akhir-akhir ini, kebutuhan energi meningkat tetapi ketersediaan sangat terbatas. Oleh karena itu, sangat penting untuk melakukan penelitian lebih lanjut energi alternatif. Generator adalah salah satu energi alternatif yang digunakan oleh masyarakat, tapi itu memiliki kekurangan seperti ketidakstabilan tegangan dan rendah efisiensi generator. Berdasarkan isu-isu tersebut, sehingga kami membuat flywheel aplikasi dalam generator listrik, yang bertujuan untuk menghasilkan suatu konsep efisiensi daya meningkat, menstabilkan tegangan keluaran Generator dan mulai proses pembangkit listrik. Proses pembuatan mesin aplikasi flywheel generator mulai dari perancangan mekanik flywheel, mencari jumlah rotasi per menit dari generator (dengan percobaan), menemukan elemen mesin yang menggunakan (poros, bantalan dan roda gila), nilai output generator. dari hasil desain mesin adalah diperlukan maksimal 2.5 KW - 3 KW dengan 3000 rpm yang diberikan motor listrik dengan sistem transmisi yang menggunakan balt, massa roda gila 60 kg x 2 kg dan daya output maksimum dari generator 3 KW

Hubungan Kekuatan Otot Lengan dan Power Otot Tungkai terhadap Kemampuan Renang Gaya Dada pada Mahasiswa Penjaskesrek Fkip Unsyiah Angkatan 2011

Penelitian ini berjudul “Hubungan kekuatan otot lengan dan power otot tungkai dengan kemampuan renang gaya dada dilakukan pada mahasiswa Penjaskesrek FKIP Unsyiah Angkatan 2011”. Penelitian ini bertujuan untuk mengetahui hubungan kekuatan otot lengan dan power otot tungkai terhadap kemampuan renang gaya dada pada mahasiswa Penjaskesrek FKIP Unsyiah Angkatan 2011. Jenis penelitian ini dinamakan penelitian deskriptif. Populasi dalam penelitian ini adalah seluruh mahasiswa Penjaskesrek FKIP Unsyiah Angkatan 2011 yang berjumlah 132 orang. Adapun sampel dalam penelitian ini adalah mahasiswa putra Angkatan 2011 Prodi Penjaskesrek FKIP Unsyiah yang telah lulus mata kuliah renang dengan nilai A dan B sebanyak 25 orang, Teknik pengambilan sampel adalah purposive sampling (sampel bertujuan). Instrumen yang digunakan dalam penelitian ini adalah: (1) Tes kekutan otot lengan, diukur dengan tes hand dynamometer, (2) Tes power otot tungkai, diukur dengan menggunakan tes vertical Jump, dan (3) Tes kemampuan renang gaya dada diukur dengan menggunakan tes renang gaya dada. Pengolahan data dilakukan dengan menggunakan rumus analisis korelasi sederhana dan korelasi ganda. Hasil penelitian yang diperoleh adalah sebagai berikut: (1) terdapat hubungan yang positif dan signifikan antara kekuatan otot lengan terhadap kemampuan renang gaya dada sebesar (r = 0.70), kekuatan otot lengan memberi kontribusi sebesar 49% terhadap kemampuan renang gaya dada, (2) terdapat hubungan yang positif dan signifikan antara power otot tungkai terhadap kemampuan renang gaya dada sebesar (r = 0.90), power otot tungkai memberi kontribusi sebesar 81% terhadap kemampuan renang gaya dada, (3) terdapat hubungan yang positif dan signifikan antara kekuatan otot lengan dan power otot tungkai secara bersama-sama terhadap kemampuan renang gaya dada sebesar (Ry.x1x2 = 0.97), hal tersebut menunjukan bahwa 94,04% variasi kemampuan renang gaya dada ditentukan oleh kedua variabel bebas secara bersama-sama

Investment-Linked Takaful Plan Patronage: Evidence From Malaysia

Investment-linked Takaful is a recent innovation introduced in Malaysia. This study focuses on Investment-linked takaful plan selection in Malaysia. We have used a self-administered questionnaire to collect data from 143 respondents from the Klang Valley area. Data collected through the survey was analyzed through descriptive statistics, correlation and regression analysis. Results indicate that fee payment and benefits play a significant role in Takaful operator selection while coverage and benefits affect the investment-linked product selection in Malaysia. This study is unique as it provides empirical evidence on the investment-linked takaful investment which is limited in supply. Results provided by this study can be useful for takaful operators in designing the most appropriate investment-linked product for attracting customers

Peningkatan Hasil Belajar Siswa Pada Pembelajaran IPA Menggunakan Metode Inkuiri Di Sekolah Dasar

This study describes the purpose of the Application of the method of inquiry in improving learning outcomes IPA fourth grade students of SDN 02 Sungai Duri. The method used is descriptive method with the form of classroom action research. The research subjects were teachers as researchers and 21 students of class IV. Based on the data analysis capabilities of teachers prepare lesson planning cycle I mean 3:01 to an average of 3:36 in the second cycle. The ability of teachers to implement learning cycle I mean 2:58 to an average of 3:02 in the second cycle. Student learning outcomes of the first cycle an average of 45.71 with the percentage of completeness 42.85%, increasing to an average of 66.66 with 80.95% the percentage of completeness in the second cycle. Based on these discussions be concluded that learning through inquiry method can improve learning outcomes IPA fourth grade students of SDN 02 Sungai Duri

Pengembangan Uji Visual Sederhana Dari Kualitas Berbagai Kompos Dan Perbandingannya Dengan Uji Laboratorium Dan Uji Percobaan Lapangan

At the market, composts are sold varied in their quality. Some of them are originated fromforest floor and other are collected from burnt and half- decomposed municipal waste. Thereis no control for commercial compost by government, thus many of composts sell at marketare not registered. Buyers should able to detect the good and bad compost quality in thesimple ways. This present experiment was conduct to develop a new simple visual test todetect the good and bad compost quality and comparing test result with the test result oflaboratory analysis and field experiment. The composts used in this experiment were:vermicompost (made by researcher), 2 burnt municipal waste (burned by researcher) and 8commercial composts. Simple test consist of several parameters viz color, odor, react ofcompost when put into water, The compost laboratory analysis were: pH, carbon organic,total nitrogen, ratio, C/N, total microorganism number, water holding capacity, compostparticle size composition. The field experiment test was conducted in the screen house usingmustard as an indicator plant. The experiment design was randomized block with 12treatments (vermicompost as a control for good compost, 2 burnt municipal waste compostsas a control for bad compost, 8 commercial composts and without adding compost) and 3replications. The result showed that the color of burnt municipal waste composts weregrayish, while the color of vermicompost was dark brown. No Odor of burnt municipalwaste compost was founds, while the odor of vermicompost was humid odor. All of theburnt municipal waste composts were sinking into the bottom of glass when it puted intowater, and not for vermicompost. Almost all of compost solid from forest floor was floatingwhen puted into water. The laboratory analysis test showed the burnt municipal compostshad the lowest C organic, N total content, C/N, and total microorganism number, and had thehighest pH value compare to other composts. The tests showed that some of commercialcomposts quality were bad. Meanwhile, the result of field experiment test did not gave thesignificant effect on the growth and production of mustard (Brassica juncea) using good orbad compost quality compare to control (without adding compost). As conclusion, the badquality of compost especially the burnt municipal waste compost, and the forest floorcompost were able detect using simple test by putting it into water

Kajian Total Biomassa Rerumputan Dan Pengaruhnya Terhadap Tata Air Tanah Di Daerah Tangkapan Air Danau Toba. Studi Kasus Di Kecamatan Silahisabungan Kabupaten Dairi

The study on the total of biomass of grasses and it\u27s influences on soil moisture was conducted atSilahisabungan Subdistrict Dairi District, from November 2011 until February 2012. The objectiveof this research was to evaluate the effect of grasses to soil mositure. This study used survey methodwith purposive sampling. The result of this research showed that grass vegetation with rathersloping class total biomass 10,6 ton/ha, carbon reserve 5,3 ton/ha, field capacity 63,4 %, permanentwilting point 1,3 %, water content 62,0 % and permeability 7,5 cm/hours. In the undulating slopestotal biomass 7,1 ton/ha, carbon reserve 3,55 ton/ha, field capacity 51,6 %, permanent wiltingpoint 2,4 %, water content 49,2 % and permeability 7,6 cm/hours. In the rather steep slope totalbiomass 15,5 ton/ha, carbon reserve 7,75 ton/ha, field capacity 32,8 %, permanent wilting point 3,8%, water content 29,0 % and permeability 9,6 cm/hourd. In the forest vegetation with rather slopingclass, biomass total 7,54 ton/ha, carbon reserve 3,77 ton/ha, field capacity 150 %, permanent wiltingpoint 23,5 %, water content 126,5 % and permeability 10,3 cm/hours. In the undulating slopes totalbiomass 6,24 ton/ha, carbon reserve 3,12 ton/ha, field capacity 51,5 %, permanent wilting point 7,5%, water content 44 % and permeability 8,2 cm/hours. In the rather steep slope total biomass 8,86ton/ha, carbon reserve 4,43 ton/ha, field capacity 33,3 %, permanent wilting point 4,2 %, watercontent 29,2 % and permeability 11,25 cm/hours

Peranan Mikoriza Terhadap Pertumbuhan, Serapan P Dan Cd Tanaman Sawi (Brassica Juncea L.) Serta Kadar P Dan Cd Andisol Yang Diberi Pupuk Fosfat Alam

This study aimed to determine the role of Mycorrhizae on plant Cd uptake P and mustard(Brasicca juncea L.) as well as the availability of P and Cd in fed Andisol phosphate fertilizer. Theresearch was conducted in the Greenhouse, Soil Biology Laboratory, and the Laboratory ofResearch and Technology Faculty of Agriculture, University of North Sumatra, Medan, in July2012-March 2013. This study uses a randomized block design (RBD) Factorial. The first treatmentwas a factor with two levels of mycorrhizal inoculum M0 (0g) and M1 (20g), the second factor isthe treatment of phosphate fertilizer (SP-36) with 4 dose levels, P0 (0g), P1 (0.97g), P2 (1.94g ),and P3 (3.88g) with 3 Deuteronomy thus obtained 2x4x3 = 24 experimental units. The parametersmeasured were the canopy dry weight, root dry weight, P uptake, mustard plant (Brasicca juncea L.)Cd uptake, the degree of mycorrhizal infection, levels availbility of P and Cd levels Andisol. Theresults showed that administration of Mycorrhizae increase the dry weight of the canopy, the degreeof infection of the roots, P uptake and plant-available soil P levels. Phosphate fertilizersincreased the dry weight of the plant canopy and P uptake, and tend to increase levels of P and Cdsoil and plant P uptake but not statistically

Survei Dan Pemetaan Status Kalium Lahan Sawah Pada Daerah Irigasi Bahal Gajah/tiga Bolon Kecamatan Sidamanik

Survey and mapping potassium status on wet rice have been in irrigation area Bahal Gajah/TigaBolon in kecamatan Sidamanik. This research purpose to make a map potassium status on wet ricefield in irrigation area Bahal Gajah/Tiga Bolon. The research was started on April until December2012. Sampling method use free grid survey method with semi detail survey scale. Result ofanalysis process using correlation method, with Geographical Information System (GIS) program.Parameter that analysis in laboratory is exchange of potassium. The result of research showed thatpotassium exchange available devided by 5 status such as; lowest 0,118 ha (0,03%), low 1,542 ha(0,36%), medium 35,203 ha (8,24%), high 90,114ha (21,08%), and highest 300,473 ha (70,29%)

Karakteristik Lahan Sawah Yang Dialih Fungsi Menjadi Lahan Perkebunan Di Desa Tangga Batu Kecamatan HatonduhanKabupaten Simalungun

At Latest ten years, the paddy land at Tangga Batu area is use changed into plantation. This research was conducted to study characteristics of soil at some land uses ( paddy, rubber- cacao, and palm of 1,5 and 10 years old ).Soil sampling is conducted by using survey method. Soil samples are taken as soil sample disturbed and non distrubed at three (3) points in eachs land use randomly. The result showed that there is decreasing of total nitrogen at plantation and increasing of P- available at mixed farm (rubber – cacao). There are no changes of soil characteristics such us like potassiumexchange, pH, soil permeability, soil texture, and soil respirationat some land uses ( paddy, rubber- cacao, and palm of 1,5 and 10 years old )