Search

2015-01-01

Shahrukh, Hassan, Oyedun, Adetoyese Olajire, Kumar, Amit, Ghiasi, Bahman, Kumar, Linoj, Sokhansanj, Shahab

A process model was developed to determine the net energy ratio (NER) for both regular and steam-pretreated pellet production from ligno-cellulosic biomass. NER is a ratio of the net energy output to the total net energy input from non-renewable energy source into the system. Scenarios were...

2020-08-01

Seresht, Nima Gerami, Fayek, Aminah Robinson

The performance of construction systems (e.g., activities, operations, projects) is commonly measured using different indicators, such as productivity or production rate. The accurate prediction of performance, which is an important concern of construction researchers and practitioners, requires...

2016-01-01

Nathan G. Marculis, Roger Lui, Mark A. Lewis

We investigate the inside dynamics of solutions to integrodifference equations to understand the genetic consequences of a population with nonoverlapping generations undergoing range expansion. To obtain the inside dynamics, we decompose the solution into neutral genetic components. The inside...

2021-02-15

Li, Long, He, Yuyang, Zhang, Zhe, Liu, Yun

Ammonium (NH4+), ammonia (NH3) and N2 are key nitrogen species in geological nitrogen recycling. NH3 has also been proposed to play an important role in mobilizing base metals in the form of metal-ammine complexes in hydrothermal fluids. The nitrogen isotope fractionation factors among these...

2014-01-01

Wang, Jingxia, Hu, Liang, Song, Yanlin, Serpe, Michael J.

Janus poly (N-isopropylacrylamide)-co-acrylic acid/Au microgels that resemble a “snowman”, “dumbbell”, and an “abalone” were prepared by thermally evaporating a layer of Au on half of the microgel surface, followed by exposure to thiolated single-stranded DNA with complementary sequences. We...

2014-01-01

Su, Marcia Shu-Wei, Gänzle, Michael G.

his study characterized the two-component regulatory systems encoded by bfrKRT and cemAKR, and assessed their influence on biofilm formation by Lactobacillus reuteri 100-23. A method for deletion of multiple genes was employed to disrupt the genetic loci of two-component systems. The operons...

2017-01-01

Ehsan Rahmati, Alireza Nouri, Vahidoddin Fattahpour, Japan Trivedi

This paper investigates the effect of anisotropic behavior of caprock shales on the caprock failure pressure in SAGD projects. Shales and mudstones exhibit strong anisotropy at the micro and macro scales. However, the anisotropic behavior has been neglected in the existing published works on...

2017-01-01

Ehsan Rahmati, Alireza Nouri, Vahidoddin Fattahpour, Japan Trivedi

There has been an increasing awareness of the importance of caprock integrity during Steam Assisted Gravity Drainage (SAGD) operations. However, mathematical tools that have been developed for caprock integrity studies have not incorporated an important characteristic of cap shales, which is...

2018-01-01

Siavash Taghipoor, Morteza Roostaei, Arian Velayati, Atena Sharbatian, Dave Chan, Alireza Nouri

This paper presents a numerical investigation of hydraulic fracturing in oil sands during cold water injection by considering the aspects of both geomechanics and reservoir fluid flow. According to previous studies, the low shear strengths of unconsolidated or weakly consolidated sandstone...

2016-01-01

Mahshid Jafar Pour, Alireza Nouri, Dave Chan

This paper presents a numerical model with a new approach for analyzing the propagation of pressure waves in porous media and investigates the dynamic response of sand in relation to the attributes of pore pressure pulses. There are various instances in which dynamic phenomena can have a...