US Liquefied Natural Gas (LNG) exports: boom or bust for the global climate?

Due to surging natural gas production, the United States is now a growing exporter of liquefied natural gas (LNG) to overseas destinations. However, the potential greenhouse gas implications from increased US natural gas remain unclear. Through a hybrid lifecycle energy strategy analysis, we investigate potential greenhouse gas scenarios of US LNG exports to Asia, the largest source of global LNG demand. We find that the climate impacts of US exports to China, Japan, India, and South Korea could vary tremendously. Annual global lifecycle emissions range from -32 to +63 million metric tons CO2e per billion cubic feet (Bcf) per day of exports. Despite this range, emissions are not likely to decrease and may increase significantly due to greater global energy consumption, higher emissions in the US, and methane leakage. However, international climate obligations are a critical uncertainty underlying all emissions estimates. Our results indicate the need for further research into quantifying the climate impacts of LNG exports, and energy exports more generally

The Canada-France Ecliptic Plane Survey - Full Data Release: The orbital structure of the Kuiper belt

We report the orbital distribution of the trans-neptunian objects (TNOs) discovered during the Canada-France Ecliptic Plane Survey, whose discovery phase ran from early 2003 until early 2007. The follow-up observations started just after the first discoveries and extended until late 2009. We obtained characterized observations of 321 sq.deg. of sky to depths in the range g ~ 23.5--24.4 AB mag. We provide a database of 169 TNOs with high-precision dynamical classification and known discovery efficiency. Using this database, we find that the classical belt is a complex region with sub-structures that go beyond the usual splitting of inner (interior to 3:2 mean-motion resonance [MMR]), outer (exterior to 2:1 MMR), and main (in between). The main classical belt (a=40--47 AU) needs to be modeled with at least three components: the `hot' component with a wide inclination distribution and two `cold' components (stirred and kernel) with much narrower inclination distributions. The hot component must have a significantly shallower absolute magnitude (Hg) distribution than the other two components. With 95% confidence, there are 8000+1800-1600 objects in the main belt with Hg <= 8.0, of which 50% are from the hot component, 40% from the stirred component and 10% from the kernel; the hot component's fraction drops rapidly with increasing Hg. Because of this, the apparent population fractions depend on the depth and ecliptic latitude of a trans-neptunian survey. The stirred and kernel components are limited to only a portion of the main belt, while we find that the hot component is consistent with a smooth extension throughout the inner, main and outer regions of the classical belt; the inner and outer belts are consistent with containing only hot-component objects. The Hg <= 8.0 TNO population estimates are 400 for the inner belt and 10,000 for the outer belt within a factor of two.Comment: 59 pages, 9 figures, 7 table

CMSに基づく医学/生物学分野向け文献管理データベース

PubMed (http://www.nxbi.nlm.nih.gou/entrez/) is the standard public database system for publications in medical and biological fields. Every registered paper in this database is assigned a unique ID number, PMID. Detailed information for a given paper can be obtained from the database using PMID as a key. Recently, applications of Content Management System (CMS) have become widespread for constructing WWW portal sites. Taking advantage of these resources for neuroinformatics. we have applied the CMS technologies for providing a data sharing environment in the laboratory. In this paper, we present a bibliographic database module, PubMedPDF, which can be used on a PHP- based CMS, XOOPS. The module is capable of managing PDF (Portable Document Format) reprint files in addition to their bibliographical information provided by PubMed. Registered literature information is automatically indexed based on the title, authors, year of publication, journal and key words in abstracts. The system may be highly useful for literature management not only for personal or laboratory use, but also for neuroinformatics portal sites

一般化Meckeの公式とその移動体通信網への応用

The model stems from the analysis of wireless communication systems where several antennas share the same (or different but interfering) channels, and the good reception of the signal emitted by an antenna depends on the signal to noise or signal to interference ratio. This is for instance the case for the CDMA (Code Division Multiple Access) technology, which is one of the basic schemes of the 3rd generation wireless communications. Miyazawa proposed the generalized Mecke\u27s formula, which is called GMF. As special cases of GMF, he derived the Swiss Army formula, Mecke\u27s formula for a random measure (MF-M), Mecke\u27s formula for a point process (MF-P) and Little\u27s formula and so on. This paper describes Mecke\u27s formula in stochastic geometry and derives a simple relationship with the number of cells of the Boolean model covering the point of origin by using some types of Mecke\u27s formula

閉鎖性水域の潮流解析における開境界条件の設定法

In order to estimate circulation process of nutrients and improve the water quality in an inner bay, it is important to be evaluated characteristics of flow field at the first setout. In this analysis, it has a problem with assignment of tidal level at open boundary, because it is impossible to get measurement values for arbitrary position and time. In this paper, it is presented a new method which is using a tide model program, Naotide, to estimation of tidal level at open boundary. It can be calculated tidal level of any point and time, because Naotide is calculated it based on interplanetary forces. Effectiveness of the method was proved by applying it to calculation of tidal flow field in Harimanada. It could be effectively used for modeling and simulation of flow field, especially, in the case of existing several open boundaries

確率幾何学とアドホックネットワークについての考察

An ad hoc network is a network made of a collection of mobile nodes that gather spontaneously and communicate without requiring a pre-existing infrastructure. Of course an ad hoc network uses a wireless communication medium. It can be applied in military, rescue and emergency operations, and high speed access to internet. It was recently shown that stochastic geometry can be used for the modeling and performance evaluation and the cost analysis of several classes of communication networks. The general idea consists in representing all objects of a large network as realizations of point or random set processes; e.g. mobiles or base stations as point processes, local areas as random cells etc. This paper introduces stochastic geometry models for an ad hoc network. We first summarize the basic theory in stochastic geometry for the modeling of communication networks. We mainly provide an application of stochastic geometry to medium access, routing and power efficiency in an ad hoc network

A parametric study of CO⁠2 capture from gas-fired power plants using monoethanolamine (MEA)

Gas-FACTS EPSRC; CO2QUEST EU FP7 Grant; MESMERISE-CCS EPSR