Conference Reports: Aspen Workshop on Numerical Investigations of Singularities in GR, Susan Scott : : : : 15 Second Annual Penn State Conference: Quantum Geometry, Abhay Ashtekar : : : : : : : 17 First Samos Meeting, Spiros Cotsakis and Dieter Brill : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 19 Aspen Conference on Gravitational Waves and Their Detection, Syd Meshkov : : : : ...

1. Resource selection specialization may increase vulnerability of populations to environmental change. One environmental change that may negatively impact some populations is the broad decline of quaking aspen Populus tremuloides, a preferred nest tree of cavity-nesting organisms who are commonly limited by nest-site availability. However, the long-term consequences of this habitat change for ...

BACKGROUND Ionic liquids (ILs) draw attention as green solvents for pretreatment of lignocellulose before enzymatic saccharification. Imidazolium-based ILs with different anionic constituents ([HSO4]-, [Cl]-, [MeCO2]-) were compared with regard to pretreatment of wood from aspen and spruce. The objective was to elucidate how the choice of anionic constituent affected the suitability of using th...

ISSN 0738-4602 n The challenging timeline for DARPA’s Orbital Express mission demanded a flexible, responsive, and (above all) safe approach to mission planning. Mission planning for space is challenging because of the mixture of goals and constraints. Every space mission tries to squeeze all of the capacity possible out of the spacecraft. For Orbital Express, this means performing as many expe...

Nestedness and modularity are measures of ecological networks whose causative effects are little understood. We analyzed antagonistic plant-herbivore bipartite networks using common gardens in two contrasting environments comprised of aspen trees with differing evolutionary histories of defence against herbivores. These networks were tightly connected owing to a high level of specialization of ...

Abstract 
 The use of coal as a source energy for hydrogen production is desirable because it widely available, inexpensive, and guarantees long-term availability compared to natural gas. In this study, modeling simulation plant from gasification was carried out. study also optimized process variables affecting minimum carbon dioxide emissions. Modeling out using ASPEN One Suites Ver. 11 s...

We monitored sap flow and estimated diurnal changes in transpiration rates of two trembling aspen (Populus tremuloides Michx.) stands, located in the southern boreal forest and aspen parkland of Saskatchewan, Canada. In both stands during the peak growing season (June and July), sap flow during the day (0700-1700 h local time) increased linearly with vapor pressure deficit (VPD) from 0 to about...

Two process models are used to convert carbon dioxide into methanol. These processes have been extended and improved using Aspen Plus simulator software. Both processes are found in the CO2 correction system. In this machine, the desired synthesis gas is produced in a flexible configuration. At the same time, the conversion of CO2 to hydrogen via a copper-based catalyst ha...

A flavor-universal extension of the strong interactions was recently proposed in response to the apparent excess of high-ET jets in the inclusive jet spectrum measured at the Tevatron. The color octet of massive gauge bosons (‘colorons’) that is present in the low-energy spectrum of the model’s Higgs phase is studied here. Experimental constraints already imply that the coloron mass must exceed...

In the present work, the optimization of different structural and process parameters of a divided wall column (DWC) for the energy efficiency has been presented. The optimal design and operation of divided wall distillation columns involve a number of variables and is a non-linear problem. Rigorous simulation of a DWC was carried out using Multifrac model of ASPEN Plus software. Box–Behnken des...