A Note on TeV Cerenkov Events as Bose-Einstein Gamma Condensations

The idea that the TeV air showers, thought to be produced by >10 TeV gamma rays from Mrk 501, can be mimicked by coherent bunches of sub-TeV photons is reexamined, focusing on fundamental considerations. In particular, it is shown that the minimum spot size of the beam of pulsed TeV photons arriving at Earth is on the order of a few kilometers, unless a lens with certain characteristics is placed between the TeV laser and Earth. The viability of the laser production mechanism proposed by Harwit et al. (2000) is also reassessed.Comment: 4 page

Hydrodynamic Effects in the Symmetron and f(R)f(R)-gravity Models

In this paper we present the first results from implementing two scalar-tensor modified gravity theories, the symmetron and the Hu-Sawicki $f(R)$-gravity model, into a hydrodynamic N-body code with dark matter particles and a baryonic ideal gas. The study is a continuation of previous work where the symmetron and $f(R)$ have been successfully implemented in the RAMSES code, but for dark matter only. By running simulations, we show that the deviation from $\Lambda$CDM in these models for the gas density profiles are significantly lower than the dark matter equivalents. When it comes to the matter power-spectrum we find that hydrodynamic simulations agree very well with dark matter only simulations as long as we consider scales larger than $k\sim 0.5$ h/Mpc. In general the effects of modified gravity on the baryonic gas is found to not always mirror the effects it has on the dark matter. The largest signature is found when considering temperature profiles. We find that the gas temperatures in the modified gravity model studied here show deviations, when compared to $\Lambda$CDM, that can be a factor of a few larger than the deviations found in density profiles and power spectra.Comment: 11 pages, 10 figures, submitted to MNRA

A New Monte Carlo Based Algorithm for the Gaussian Process Classification Problem

Gaussian process is a very promising novel technology that has been applied to both the regression problem and the classification problem. While for the regression problem it yields simple exact solutions, this is not the case for the classification problem, because we encounter intractable integrals. In this paper we develop a new derivation that transforms the problem into that of evaluating the ratio of multivariate Gaussian orthant integrals. Moreover, we develop a new Monte Carlo procedure that evaluates these integrals. It is based on some aspects of bootstrap sampling and acceptancerejection. The proposed approach has beneficial properties compared to the existing Markov Chain Monte Carlo approach, such as simplicity, reliability, and speed

A Spallation Model for the Titanium-rich Supernova Remnant Cassiopeia A

Titanium-rich subluminous supernovae are rare and challenge current SN nucleosynthesis models. We present a model in which ejecta from a standard Supernova is impacted by a second explosion of the neutron star (a Quark-nova), resulting in spallation reactions that lead to 56Ni destruction and 44Ti creation under the right conditions. Basic calculations of the spallation products shows that a delay between the two explosions of ~ 5 days reproduces the observed abundance of 44Ti in Cas A and explains its low luminosity as a result of the destruction of 56Ni. Our results could have important implications for lightcurves of subluminous as well as superluminous supernovae.Comment: Accepted/to be published in Physical Review Letters. [ for more info on the Quark Nova, see: http://quarknova.ucalgary.ca/

Mineral Utilization in Rams Fed Ration Supplemented with Different Levels of Chromium, Calcium, and Cation-Anion Balances

Chromium (Cr) is an essential mineral for ruminants. Its metabolism and interactions with other minerals has not been widely known. This experiment was designed to evaluate the utilization of minerals and growth of Garut ram fed ration supplemented with Cr and different Dietary Cation Anion Balance (DCAB) and Ca level. Dietary treatments, namely: R0 (Ration with DCAB+14); R1 (Ration with DCAB+14 + Cr 3ppm,); R2 (Ration with DCAB 0 + Ca); R3 (Ration with DCAB 0 + Cr 3 ppm + Ca), were allocated in twenty four of 1.5-2 years old Garut rams in a randomized block design. The results showed that Cr supplementation in rations containing different levels of Ca did not affect feed intake, body weight gain, and dry matter digestibility, but reduced the absorption of Cr and Ca of the low Ca diet. Supplementation of Cr had no effect on Cr, Ca, Zn, and Mg status in blood and semen of the rams. Level of Cr intake had negative correlation with Ca absorption and positive correlation with blood Cr levels. There is a positive relationship between level of Ca intake with Ca and Mg absorption and blood Ca and Zn levels. Intake of Cr and Ca was not related to the semen Cr and Ca levels

Transient Emission From Dissipative Fronts in Magnetized, Relativistic Outflows. II. Synchrotron Flares

The time dependent synchrotron emission from relativistic jets, and the relation between the synchrotron and ERC emission is considered within the framework of the radiative front model. The timescale and profile of the optically thin emission are shown to be determined, in this model, by the shock formation radius, the thickness of expelled fluid slab and the variation of the front's parameters due to its transverse expansion. For a range of reasonable conditions, a variety of flare shapes can be produced, varying from roughly symmetric with exponential rises and decays, as often seen in blazars, to highly asymmetric with a fast rise and a much slower, power law decay, as seen in GRB afterglows. The onset, duration, and fluence of low-frequency (below the initial turnover frequency) and hard gamma-ray (above the initial gamma-spheric energy) outbursts are limited by opacity effects; the emission at these energies is quite generally delayed and, in the case of sufficiently short length outbursts, severely attenuated. The observational consequences are discussed. One distinctive prediction of this model is that in a single, powerful source, the upper cutoff of the gamma-ray spectrum should be correlated with the timescale of the outburst and with the amplitude of variations at long wavelengths (typically radio to millimeter).Comment: AAS LaTex, 14 pgs, accepted to A

Analisis Faktor-Faktor Yang Dipertimbangkan Dalam Penentuan Nisbah Bagi Hasil Atas Pembiayaan Mudharabah Pada Perbankan Syariah (Studi Empiris Pada Perbankan Syariah Kota Samarinda)

This study aims to; determine the factors considered by Islamic Banking as shahibul maal in determining the profit sharing ratio up of financing; determine the factors most taken into consideration by the Islamic Banking as shahibul maal in the determination of the profit sharing ratio on financing mudaraba. This study used a population of 75 people consisting of management and employees in five Islamic Bank in the city of Samarinda, the Syariah BRI, BNI Syariah, Bank Syariah Mandiri, Bank Syariah Muamalat and Bank of East Kalimantan. The research instrument used in the form of a questionnaire. Validity and reliabiltas instrument was tested using Spearman rank and Cronbach alpha. Data were analyzed using factor analysis with the aid of a computer program Statistical Product and Service Solution (SPSSversi 11.0 forWindows). Results showed: (1) based on the calculation on the total variance explained is known that the number of factors that have eigenvalues > 1 of 7 factors, namely the customer's business, guarantees, regulation, policy banks, costs, competition and risks. Seventh these factors into consideration in determining the ratio of Islamic Banking for the top results of financing, (2) based on the calculation of the total variance explained is known that the factors that have the greatest eigen values that 5.923 is a factor of the customer's business. Thus the most dominant factor into consideration Islamic Banking in determining the profit sharing ratio of financing is a factor on the customer's busines

Pengkajian Stok Ikan Cakalang (Katsuwonus Pelamis) Di Perairan Selat Makassar

Dinamika populasi ikan cakalang (Katsuwonus pelamis, Linnaeus) di perairan Selat Makassar yang merupakan bagian Wilayah Pengelolaan Perikanan Republik Indonesia 713 (WPP RI 713) di Provinsi Sulawesi Selatan dan Barat telah dilakukan dengan mengumpulkan sampel sejumlah 20.707 ekor ikan cakalang yang tertangkap dengan alat tangkap purse sSeine dan hand line di Kabupaten Barru dan Majene. Pengambilan sampel dilakukan pada bulan Mei – Oktober 2014 di sentra pendaratan ikan. Ukuran frekuensi panjang cagak diukur dan menduga parameter panjang cagak asimtot (L∞), koefisien pertumbuhan (K), koefisien kematian total (Z), koefisien kematian alami (M), koefisien kematian penangkapan (F), laju eksploitasi (E) dan potensi hasil tangkapan per rekrut relatif (Y\u27/R) dengan menggunakan alat bantu perangkat lunak FISAT-II. Hasil dugaan parameter pertumbuhan von Bertalanffy dengan metode Response Surface pada ELEFAN-I yaitu L∞ = 107,0 cm dan K = 0,8 per tahun. Laju mortalitas total diduga dengan menggunakan analisis kurva hasil tangkapan yaitu Z = 4,47 per tahun. Kematian alami diduga dengan rumus empiris Pauly diperoleh nilai dugaan M = 1,1 per tahun. Kematian karena penangkapan (F) sebesar 3,37 per tahun memberikan hasil dugaan laju eksploitasi (E) sebesar 0,75. Dugaan model hasil-per-rekruit relatif Beverton dan Holt menunjukkan bahwa tingkat eksploitasi telah memperlihatkan lebih tangkap sebesar 26,5% dari nilai E-optimumnya

Pembuatan Game House Petualangan ”Harta Tersembunyi” Menggunakan Adobe Flash

Perkembangan dunia game berkembang sangat cepat sehingga banyak orang berminat untuk membuat game. Dari pengembangan game yang ada, kadang-kadang masih ada pertandingan yang sulit dimainkan dan tidak menarik meskipun sedang menggunakan grafis yang baik. Pemanfaatan komputer multimedia adalah sarana untuk membuat dan menggabungkan beberapa media seperti teks, grafik, audio, dan gambar gerak (animasi dan video). Dengan menggabungkan link dan tool yang memungkinkan pengguna menavigasi, berinteraksi, membuat dan berkomunikasi

Perancangan Buku Pengenalan Hardware Komputer Dengan Augmented Reality

Augmented reality is technology which combined virtual 2D and 3D object into real environment and projecting 3D virtual object in a real time. Augmented reality or AR is now happening and tend to be high progressed in a daily life. It also has a lot of innovation on the promotion media and advertisement in a business sector.One of the big points in this case is about promoting the product to the consumer in 3D catalog based on AR. As the promotion implemented in general furniture catalog which use 2D photo products only. This promotion can\u27t figure the product detail to the customer, especially when the customer came to the stand. AR technology can be advantageous and more interesting in providing such information of the offered product in 3D virtual object.By promoting products using AR technology, hopefully the company can give more interesting information and more attract the customer. And the also the customer could be more responsive and understood what the product that has been provided. This is one of the advantageous of AR which combining real life and virtual one.Nowadays there are a lot of applications that use to built up AR, using a camera, or another hard ware such as web cam to capture a pictures, then the pictures will be translated by application which has already introduce as a marker, and the application might represent the picture and the previous object which paired with the marker. So the real thing can be fuse with virtual object in the end of application preview