Pool boiling on modified surfaces using R-123

This article has been made available through the Brunel Open Access Publishing Fund.Saturated pool boiling of R-123 was investigated for five horizontal copper surfaces modified by different treatments, namely, an emery-polished surface, a fine sandblasted surface, a rough sandblasted surface, an electron beam-enhanced surface, and a sintered surface. Each 40-mm-diameter heating surface formed the upper face of an oxygen-free copper block, electrically heated by embedded cartridge heaters. The experiments were performed from the natural convection regime through nucleate boiling up to the critical heat flux, with both increasing and decreasing heat flux, at 1.01 bar, and additionally at 2 bar and 4 bar for the emery-polished surface. Significant enhancement of heat transfer with increasing surface modification was demonstrated, particularly for the electron beam-enhanced and sintered surfaces. The emery-polished and sandblasted surface results are compared with nucleate boiling correlations and other published data. © 2014 Syed W. Ahmad, John S. Lewis, Ryan J. McGlen, and Tassos G. Karayiannis Published with license by Taylor & Francis

Corrections to Tribimaximal Mixing from Nondegenerate Phases

We propose a seesaw scenario that possible corrections to the tribimaximal pattern of lepton mixing are due to the small phase splitting of the right-handed neutrino mass matrix. we show that the small deviations can be expressed analytically in terms of two splitting parameters($\delta_1$ and $\delta_2$) in the leading order. The solar mixing angle $\theta_{12}$ favors a relatively smaller value compared to zero order value ($35.3^\circ$), and the Dirac type CP phase $\delta$ chooses a nearly maximal one. The two Majorana type CP phases $\rho$ and $\sigma$ turn out to be a nearly linear dependence. Also a normal hierarchy neutrino mass spectrum is favored due to the stability of perturbation calculations.Comment: 19 pages 6 figures, Accepted by Mod. Phy. Lett.

Development of an Online Sales Information System for SMEs Using Incremental Methods

Home Industry Shoes is one of the SMEs that are engaged in the production and sale of shoes. Shoes SMEs in marketing and sales have been still relying on customers from surrounding areas of production activities. Current business competition is stringent, thus making SME shoes demanded to be more advanced in marketing and sales to be able to stay afloat. Shoes SMEs have problems with promotional media and sales, which does not yet have an independent online sales system. Therefore, the authors feel the need to help SMEs by creating an online sales information system that can be used as a promotional media as well as a media for selling independently and easy to use. In this study, the authors apply the incremental method in system development and also observation in gathering data on the needs of the system developed. Achievements in this study, the authors, produce an online sales information system for SMEs, in particular, the production of home industry shoes that can be used independently by SMEs to carry out promotions and sales online.Home Industry Shoes is one of the SMEs that are engaged in the production and sale of shoes. Shoes SMEs in marketing and sales have been still relying on customers from surrounding areas of production activities. Current business competition is stringent, thus making SME shoes demanded to be more advanced in marketing and sales to be able to stay afloat. Shoes SMEs have problems with promotional media and sales, which does not yet have an independent online sales system. Therefore, the authors feel the need to help SMEs by creating an online sales information system that can be used as a promotional media as well as a media for selling independently and easy to use. In this study, the authors apply the incremental method in system development and also observation in gathering data on the needs of the system developed. Achievements in this study, the authors, produce an online sales information system for SMEs, in particular, the production of home industry shoes that can be used independently by SMEs to carry out promotions and sales online

PEMERIKSAAN JUMLAH SEL LEUKOSIT PADA PENDERITA TUBERKULOSIS PARU DI UPT KESEHATAN PARU MASYARAKAT DINAS KESEHATAN PROVINSI SUMATERA UTARA

Tuberkulosis paru atau sering disebut TB paru merupakan suatu penyakit infeksi paru yang disebabkan oleh kuman mycobacterium tuberculosis yang ditularkan melalui udara. Salah satu pemeriksaan penunjang pada penderita TB paru adalah pemeriksaan jumlah sel Lekosit. Lekosit berfungsi dalam memerangi infeksi yang disebabkan oleh virus, bakteri, ataupun proses metabolik toksin. Pada penderita TB paru ditemukan sedikit peningkatan jumlah sel Lekosit yang disebut dengan istilah Leukositosis. Tujuan peneltiian ini untuk mengetahui jumlah sel Lekosit pada penderita Tuberkulosis paru di UPT Kesehatan Paru Masyarakat Dinas Kesehatan Provinsi Sumatera Utara. Disain penelitian bersifat deskriftif cross sectional. Penulis ingin melakukan pemeriksaan jumlah sel Lekosit dengan menggunakan alat Auto Hematology Analyzer Mindray BC-300 Plus dengan sampel sebanyak 50 orang, bahan yang digunakan adalah darah dengan antikoagulan EDTA. Penelitian dilakukan di laboratorium UPT Kesehatan Paru Masyarakat Dinas Kesehatan Provinsi Sumatera Utara. Dari hasil penelitian diperoleh Lekosit yang normal sebanyak 30 orang (60%), meningkat sebanyak 20 orang (40%)

PEMERIKSAAN JUMLAH SEL LEUKOSIT PADA PENDERITA TUBERKULOSIS PARU DI UPT KESEHATAN PARU MASYARAKAT DINAS KESEHATAN PROVINSI SUMATERA UTARA

Tuberkulosis paru atau sering disebut TB paru merupakan suatu penyakit infeksi paru yang disebabkan oleh kuman mycobacterium tuberculosis yang ditularkan melalui udara. Salah satu pemeriksaan penunjang pada penderita TB paru adalah pemeriksaan jumlah sel Lekosit. Lekosit berfungsi dalam memerangi infeksi yang disebabkan oleh virus, bakteri, ataupun proses metabolik toksin. Pada penderita TB paru ditemukan sedikit peningkatan jumlah sel Lekosit yang disebut dengan istilah Leukositosis. Tujuan peneltiian ini untuk mengetahui jumlah sel Lekosit pada penderita Tuberkulosis paru di UPT Kesehatan Paru Masyarakat Dinas Kesehatan Provinsi Sumatera Utara. Disain penelitian bersifat deskriftif cross sectional. Penulis ingin melakukan pemeriksaan jumlah sel Lekosit dengan menggunakan alat Auto Hematology Analyzer Mindray BC-300 Plus dengan sampel sebanyak 50 orang, bahan yang digunakan adalah darah dengan antikoagulan EDTA. Penelitian dilakukan di laboratorium UPT Kesehatan Paru Masyarakat Dinas Kesehatan Provinsi Sumatera Utara. Dari hasil penelitian diperoleh Lekosit yang normal sebanyak 30 orang (60%), meningkat sebanyak 20 orang (40%)

The Relation Between Minimum Wages and Poverty in Indonesia: an Islamic Perspective

This study is part of Islamic economics research that aims to determine the relationship between the minimum wage and poverty rate in Indonesia, especially case studies in West Java, Central Java, East Java, Special Region of Yogyakarta, and Banten during the period 2007-2013. In addition to the primary independent variable, there are six control variables are used, the level of education, the GDP per capita, unemployment rate, inflation rate, average wages and economic growth. The analysis technique used in this study are Arellano Bond Dynamic GMM (Generalized Method of Moment). The results of this study found that the minimum wage is not a significant effect on poverty levels in 2007-2013, especially in the districts/cities in West Java, Central Java, East Java, Special Region of Yogyakarta and Banten. Based on the explanation above, it can be concluded that government has responsibilities and sufficient role to reduce poverty through minimum wage standardization, the state also has responsibilities to create social security, both for those who are unable to work, informal workers and vulnerable workers, so that the level of wages (income) they can meet any basic needs according to Ibn Hazm include food, clothing, health, education and housing

A Unified Approach towards Describing Rapidity and Transverse Momentum Distributions in Thermal Freeze-Out Model

We have attempted to describe the rapidity and transverse momentum spectra, simultaneously, of the hadrons produced in the Ultra-relativistic Nuclear Collisions. This we have tried to achieve in a single statistical thermal freeze-out model using single set of parameters. We assume the formation of a hadronic gas in thermo-chemical equilibrium at the freeze-out. The model incorporates a longitudinal as well as a transverse hydrodynamic flow. We have also found that the role of heavier hadronic resonance decay is important in explaining the particle spectra.Comment: 22 pages, 11 figure

Passively mode-locked laser using an entirely centred erbium-doped fiber

This paper describes the setup and experimental results for an entirely centred erbium-doped fiber laser with passively mode-locked output. The gain medium of the ring laser cavity configuration comprises a 3 m length of two-core optical fiber, wherein an undoped outer core region of 9.38 μm diameter surrounds a 4.00 μm diameter central core region doped with erbium ions at 400 ppm concentration. The generated stable soliton mode-locking output has a central wavelength of 1533 nm and pulses that yield an average output power of 0.33 mW with a pulse energy of 31.8 pJ. The pulse duration is 0.7 ps and the measured output repetition rate of 10.37 MHz corresponds to a 96.4 ns pulse spacing in the pulse train

The performance of modified jatropha-based nanofluid during turning process

The industry's extensive use of petroleum-based metalworking fluid (MWF) harms the environment and humans. The production of bio-based MWF, especially from crude jatropha oil (CJO), has therefore taken numerous initiatives. This aimed to formulate newly modified jatropha oil (MJO) with the addition of 0.05wt.% hBN and 0.05wt.% MoS2 as the nanofluid for MWF. The performance of the nanofluids was determined through the turning process in terms of cutting temperature, workpiece surface roughness, tool life and tool wear of the tool lubricated by the nanofluids. The performance of the nanofluid samples was compared with the synthetic ester (SE). From the results, after conducted 100mm axial cutting length MJO+hBN+MoS2 recorded the lowest in cutting temperature and surface roughness compared to all samples. The result shows that MJO+hBN+MoS2 has longer tool life (6500mm) compared to SE (6000mm). Abrasion and adhesion were observed as the dominant tool wear mechanism. In conclusion, MJO+hBN+MoS2 shows better machining performance and has the potential to be an environmentally friendly metalworking fluid