Applied Science Private University

About: Applied Science Private University is a education organization based out in Amman, Jordan. It is known for research contribution in the topics: Catalysis & Population. The organization has 4124 authors who have published 5299 publications receiving 116167 citations.

Performance of Secondary Carbonated Water Injection in Light Oil Systems

Abstract: In this study, the performance of secondary carbonated water injection (CWI) was investigated at various operating pressures (i.e., P = 0.7–10.3 MPa). Prior to CWI tests, CO2 solubility in both brine and oil samples was measured using a high pressure visual cell. Next, through a series of flooding experiments, the effect of various operating conditions on the efficiency of CWI as a means of secondary oil recovery technique was investigated. Results showed that the ultimate oil recovery of secondary CWI can be increased by about 19% as compared to that of conventional water flooding (WF). It was also observed that in secondary CWI mode, an increase in operating pressure enhances the oil recovery, which is mainly attributed to higher CO2 solubility in the injected brine. It was also found that the recovery factor (RF) substantially increases to the pressure of P = 5.9 MPa followed by slow growth until the pressure reaches P = 10.3 MPa. The same turning point of P = 5.9 MPa was also observed in the plot of C...

The association between disclosure of forward-looking information and corporate governance mechanisms: Evidence from the UK before the financial crisis period

Abstract: Purpose – This paper aims to witness the importance of corporate governance mechanisms and investigates the relationship between the quality of disclosure of forward-looking information in the narrative sections of annual reports and the governance mechanisms for non-financial UK companies. Design/methodology/approach – Computerized content analysis using QSR NVivo 8 is used to measure the extent of forward-looking information in the narratives of the annual reports for 238 companies listed in the London Stock Exchange. Cross-sectional regression analysis is used to examine the impact of the corporate governance mechanisms on forward-looking information. Findings – The results show that board size and the independence of the audit committee are associated with the level of voluntary disclosure of forward-looking information. Research limitations/implication – One limitation of this study is that in controls for the effect of the financial crisis period, by selecting a representative year for a five-year p...

Spectral optical properties of selected photosynthetic microalgae producing biofuels

Abstract: Spectral Optical Properties of Selected Photosynthetic Microalgae Producing Biofuels Euntaek Lee, Ri-Liang Heng, and Laurent Pilon Mechanical and Aerospace Engineering Department Henry Samueli School of Engineering and Applied Science University of California, Los Angeles - Los Angeles, CA 90095, USA Phone: +1 (310)-206-5598, Fax: +1 (310)-206-2302 E-mail: pilon@seas.ucla.edu E. Lee, R.-L. Heng, and L. Pilon, 2013. “Spectral Optical Properties of Selected Photosyn- thetic Microalgae Producing Biofuels”, Journal of Quantitative Spectroscopy and Radiative Transfer, Vol. 114, pp. 122-135. doi:/10.1016/j.jqsrt.2012.08.012 Abstract This paper presents the spectral complex index of refraction of biofuel producing photosynthetic microalgae between 400 and 750 nm. They were retrieved from their experimentally measured average absorption and scattering cross-sections. The mi- croalgae were treated as homogeneous polydisperse spheres with equivalent diameter such that their surface area was identical to that of their actual spheroidal shape. An inverse method was developed combining Lorenz-Mie theory as the forward method and genetic algorithm. The unicellular green algae Chlamydomonas reinhardtii strain CC125 and its truncated chlorophyll antenna transformants tla1, tlaX, and tla1-CW + as well as Botryococcus braunii, Chlorella sp., and Chlorococcum littorale were investi- gated. These species were selected for their ability to produce hydrogen gas or lipids for liquid fuel production. Their retrieved real and imaginary parts of the complex index of refraction were continuous functions of wavelength with absorption peaks correspond- ing to those of in vivo Chlorophylls a and b. The T-matrix method was also found to accurately predict the experimental measurements by treating the microalgae as axisymmetric spheroids with the experimentally measured major and minor diameter distributions and the retrieved spectral complex index of refraction. Finally, pigment mass fractions were also estimated from the retrieved absorption index. The method and/or the reported optical properties can be used in various applications from ocean remote sensing, carbon cycle study, as well as photobiological carbon dioxide mitigation and biofuel production. INTRODUCTION Photobiological carbon dioxide (CO 2 ) fixation and biofuel production have received major academic and industrial interest in recent years due to rising concerns over global warming, fossil fuel cost, as well as energy security. The technology consists of providing CO 2 and