Interaction Analysis of Repeated Measure Data

Extensive penalized variable selection methods have been developed in the past two decades for analyzing high dimensional omics data, such as gene expressions, single nucleotide polymorphisms (SNPs), copy number variations (CNVs) and others. However, lipidomics data have been rarely investigated by using high dimensional variable selection methods. This package incorporates our recently developed penalization procedures to conduct interaction analysis for high dimensional lipidomics data with repeated measurements. The core module of this package is developed in C++. The development of this software package and the associated statistical methods have been partially supported by an Innovative Research Award from Johnson Cancer Research Center, Kansas State University

A novel transcritical CO2 refrigeration cycle with two ejectors

In recent years, CO2 is being revisited as a fully environmentally friendly and safe refrigerant. However, basic CO2 transcritical refrigeration cycle suffers from large expansion loss due to high pressure difference between gas cooler and evaporator. Then, it is crucial to find effective and economic way to reduce the expansion loss. Here, a novel cycle with two ejectors is proposed for the first time. Compared with conventional ejector-expansion CO2 cycle with only one ejector, this novel cycle with two ejectors is able to recover more expansion loss, thus improving the system performance further. A computational model is designed to simulate the double ejector CO2 cycle. Simulation results show its high system COP. Effects of parameters, such as ejector nozzle efficiency, gas cooler pressure, entrainment ratios of the two ejectors, gas cooler outlet temperature, on the cycle performance are also analyzed by using the computational model. (C) 2012 Elsevier Ltd and IIR. All rights reserved.</p

Pembangunan Aplikasi Ifinancing Core 2 Modul Penjualan Produk (Studi Kasus: PT. Inovasi Mitra Sejati)

Laporan kerja magang ini menjelaskan mengenai pengembangan aplikasi ifinancing Core 2 yang akan dijadikan sebagai produk PT. Inovasi Mitra Sejati dimana menawarkan fitur-fitur global dan standar yang digunakan dalam dunia multifinance. Aplikasi ini tentunya akan mempermudah user serta mempermudah perusahaan dalam menjalankan aktivitas bisnis ke depannya. Aplikasi ini berbasiskan client-server architecture yang tersentralisasi sehingga perusahaan multifinance yang akan menggunakan produk ini tidak perlu khawatir mengenai cabang perusahaannya yang tersebar di seluruh Indonesia. Bahasa pemrograman C# dengan teknologi Microsoft ASP .NET menjadi solusi yang digunakan dalam pembangunan aplikasi ifinancing ini. Selain itu PT. Inovasi Mitra Sejati telah menyediakan framework yang telah dikembangkan sendiri dan diintegrasikan dengan Visual Studio 2008 sehingga mempermudah dalam pembangunan aplikasi. Di samping itu, aplikasi tentunya tidak lepas dari database dimana database server yang digunakan oleh PT. Inovasi Mitra Sejati untuk menangani sistem ini adalah Microsoft SQL Server 2008 R2 atau versi yang lebih tinggi

XMM-Newton Detects a Hot Gaseous Halo in the Fastest Rotating Spiral Galaxy UGC 12591

We present our XMM-Newton observation of the fastest rotating spiral galaxy UGC 12591. We detect hot gas halo emission out to 110 kpc from the galaxy center, and constrain the halo gas mass to be smaller than 3.5e11 solar masses. We also measure the temperature of the hot gas as T=0.64\pm0.03 keV. Combining our X-ray constraints and the near-infrared and radio measurements in the literature, we find a baryon mass fraction of 0.03-0.04 in UGC 12591, suggesting a missing baryon mass of 75% compared with the cosmological mean value. Combined with another recent measurement in NGC 1961, the result strongly argues that the majority of missing baryons in spiral galaxies does not reside in their hot halos. We also find that UGC 12591 lies significantly below the baryonic Tully-Fisher relationship. Finally, we find that the baryon fractions of massive spiral galaxies are similar to those of galaxy groups with similar masses, indicating that the baryon loss is ultimately controlled by the gravitational potential well. The cooling radius of this gas halo is small, similar to NGC 1961, which argues that the majority of stellar mass of this galaxy is not assembled as a result of cooling of this gas halo.Comment: 20 pages, 8 figures, submitted to Ap

Heat Pump-Based Novel Energy System for High-Power LED Lamp Cooling and Waste Heat Recovery

Unlike incandescent light bulb, which radiates heat into the surroundings by infrared rays, light emitting diode (LED) traps heat inside the lamp. This fact increases the difficulty of cooling LED lamps, while it facilitates the recovery of the generated heat. We propose a novel energy system that merges high-power LED lamp cooling with the heat pump use; the heat pump can cool the LED lamp and at the same time recover the waste heat. In this way, a high percentage of the energy consumed by the LED lamp can be utilized. In this work, we developed a prototype of this energy system and conducted a series of experimental studies to determine the effect of several parameters, such as cooling water flow rate and LED power, on the LED leadframe temperature, compressor power consumption, and system performance. The experimental results clearly indicate that the energy system can lead to substantial energy savings