Keplerian Motion of Broad-Line Region Gas as Evidence for Supermassive Black Holes in Active Galactic Nuclei

Emission-line variability data on NGC 5548 argue strongly for the existence of a mass of order 7 x 10^7 solar masses within the inner few light days of the nucleus in the Seyfert 1 galaxy NGC 5548. The time-delayed response of the emission lines to continuum variations is used to infer the size of the line-emitting region, and these determinations are combined with measurements of the Doppler widths of the variable line components to estimate a virial mass. The data for several different emission lines spanning an order of magnitude in distance from the central source show the expected V proportional to r^{-1/2} correlation and are consistent with a single value for the mass.Comment: 9 pages, 2 Figures. accepted by ApJ Letter

Pengaruh Frekuensi Tes Formatif Dan Gaya Belajar Siswa Terhadap Hasil Belajar Matematika Tanpa Mengontrol Pengetahuan Awal

: This study aims to determine the effect of frequence formative test and learning styles student's toward result mathematics at SMA class X without and after controlling for previous mathematics knowledge of students the research was conducted in SMA 1 and SMA Negeri 2 in Palu Central Sulawesi Province on teachings in 2010/2011. The number of samples in this study as many as 80 students of class X with the determination of class samples done in multi-stage random sampling. The method used in this study is the experimental method with 2 x 2 factorial design. These experiments apply of frequence formative test and student's learning styles as the treatment factor, and mathematics learning outcomes as response variables, and previous knowledge of mathematics students as covariabel or covariate. Conclusion of this research are : overal there the result of the research effect between frequence formative test and student's learning style in effecting the outcome of student's learning methematics without controlling of previous knowledg

Pengaruh Debit Aliran Air Terhadap Efektifitas Direct Evaporative Cooling Dilengkapi Cooling Pad Serabut Kelapa

Evaporative cooling merupakan sistem pengkondisian udara yang menggunakan air untuk mendinginkan dan menambah kadar air atau kelembaban pada aliran udara, sehingga temperatur bola kering menjadi lebih dingin sebelum mengalami proses penguapan. Tujuan dari penelitian ini yaitu untuk mengetahui pengaruh debit aliran air pada sprayer pada direct evaporative cooler dengan menggunakan metode eksperimen. Cooling pad serabut kelapa digunakan sebagai filter dan pendinginan awal. Variabel penelitian adalah debit air yang dispray dengan variasi 0,8 L/m, 1,2L/m dan 1,45L/m. Data yang diambil meliputi data temperatur input , RH input, temperatur output dan RH output. Data-data tersebut digunakan untuk menentukan penurunan DBT(Dry Bulb Temperature), dan WBT(Wet Bulb Temperature). Hasilnya digunakan untuk menghitung efektifitas evaporative cooler. Hasil perhitungan ditampilkan dalam bentuk tabel dan grafik serta dianalisa berdasarkan teori yang ada. Hasil penelitian menunjukkan bahwa pengujian pendinginan evaporative cooling ini, dapat menurunkan temperatur hingga 25,4 oC dan menaikkan kelembaban relatif hingga 88%. Selain itu debit aliran pada sprayer mempunyai pengaruh terhadap efektifitas direct evaporative cooler. Pada penelitian ini debit aliran yang menghasilkan efektifitas paling baik yaitu berturut-turut 1,45, 1,2 dan 0,8 liter/menit

Keanekaragaman Jenis Reptil Ordo Squamata Dikawasan Hutan Lindung Gunung Semahung Desa Sebatih Kecamatan Sengah Temila Kabupaten Landak

Reptiles are one species of fauna mostly found in West Kalimantan. This research aims to investigate kinds of squamates living in the area of Semahung mountain protected forest in Sebatih village in Sengah Temila sub-district in Landak district. Thhe research took place from February 14th to March 1st 2014 using visual encounter survey (VES). The status squamates found based on the red list of IUCN (International Unio for Conservation of Nature and Natural Resources) comprises ten least concern squamates, two near threatened squamates and two not evaluated squamates. There are forteen species of squamates from five families. Based on Percent Similary value evaluation, the highest abundance is from Scincidae family that is Eutropis rudis of 37%. The highest diversity value is on aquatic habitat of e=0,8019. Of two habitats (aquatict and terrestrial) of squamates, the similary index of two habitats is 0,4, meaning that there are 40% of those species living in those habitats are similar species and 60% of those are different. It is because the two habitats have the similar altitude. Eutropis rudis have the highest meeting probability of 0,486 individual/hour. They are mostly seen in terrestrial habitat. Keywords: Squamates, species diversity, Semahung Mountai

Tingkat Kerusakan Tanah Akibat Produksi Biomassa Pertanian di Kecamatan Kuala Cenaku Kabupaten Indragiri Hulu

The research aims to study the land degradation as impact agricultural biomass production Sub-district Kuala Cenaku Indragiri Hulu, Riau Province. The research was carried out with methods of soil survey. Based on field observations that guided map and global positioning observation 4 point to the use of agricultural biomass production and 5 points on the production of forest biomass as a control. Based on Government Regulation No. 7/2006, land quality in Kuala Cenaku is not degradation criteria by agricultural biomass production. In General, value of parameters subsidence, pirit, ground water depth, pH, redox, electric conductivity, bulk density and particle density of the agricultural biomass production is higher than the production of biomass forestry. However, the value of the number of microbes, solum thickness, permeability, moisture content and porosity in agricultural biomass production is lower than on the production of biomass forestry

Pemikiran Etika Ibnu Miskawaih

Ibnu Miskawaih dijuluki sebagai bapak etika Islam. Ia telah mampu merumuskan dasar-dasar etika di dalam kitabnya Tahdzib al Akhlaq wa Thathir al A‘raq (PendidikanBudi dan Pembersihan Akhlak ). Sumber filsafat etika Ibnu Miskawaih berasal dari fisafat Yunani, peradaban Persia, ajaran syariat Islam dan pengalaman pribadi. Dalam pemikirannya mengenai etika, ia memulainya dengan menyelami jiwa manusia. Ia memandang bahwa ilmu jiwa memiliki keutamaan sendiri dibandingkan dengan ilmu-ilmu jiwa lainnya. Ajaran etika Ibnu Miskawaih berpangkal pada teori jalang tengah. Intinya menyebutkan bahwa keutamaan akhlak secara umum diartikan sebagai posisi tengah ekstrem kelebihan dan ekstrem kekurangan masing-masing jiwa manusia. Dengan demikian, menurut Ibnu Miskawaih bahwa akhlak merupakan keadaan jiwa yang mengajak sesorang untuk melakukan perbuatan tanpa dipikirkan dan diperhitungkan sebelumnya. Sehingga akhlak dapat dijadikan fitrah manusia dengan melakukan latihan-latihan yang terus menerus hingga menjadi sifat diri yang melahirkan akhlak yang baik

Sintesis dan Karakterisasi Hidroksiapatit dari Cangkang Kerang Darah dengan Proses Hidrotermal Variasi Suhu dan PH

Hydroxyapatite (HAp) Ca10(PO4)6(OH)2 is a calcium phosphate compound which is bioactive ceramic material with high bioafinitas. It is one of bones and teeth constituent. In this research, HAp was synthesized by hydrothermal process with pH reaction of 8, 10, 12 and temperature reaction of 130, 150 and 170oC. Samples were characterized by Transform Infrared Spectroscopy (FTIR). The results of FTIR analysis revealed that synthesis of HAp with hydrothermal process showed the formation of hydroxyapatite with the presence of peaks PO43- and OH-. The best condition in this research at pH 12 with reaction temperature 170oC

Model Ketahanan Kelompok Tani pada Wilayah dan Komoditas yang Berbeda di Jawa

The Green Revolutions failure caused many farmer groups to cease their activities, even though they had to fulfill many needs. This situation created a need to develop a model for group survival. With those afore mentioned background, this research was conducted. Data was collected in September and October 2005 involving rice, soybean, corn and vegetables farmer groups in the east, central and west Java. The research findings pointed out that there was a relationship between the group survival and their adaptation, goal attainment, integration and latency functions. The group survival rates were higher in central and east Java than in west Java. Additionally, the vegetable and rice farmer group survival rates were higher than the soybean and corn farmer groups. The adaptation, the goal attainment and the integration functions were more strategic for farmer groups in the west and east Java and also for vegetable farmer groups such as soybean and corn group wereas the strategic function were adaptation and integration