389 research outputs found
Jack G. Shaheen 1935–2017
No full textPioneering author and media critic, Dr. Jack Shaheen devoted his life to identifying and contesting damaging stereotypes of Arabs and Muslims in American media and pop culture. Arabs and Muslims were offered up as cartoon caricatures—dagger wielding, evil, ridiculous, hypersexualized, inhumane and incompetent “others.” Dr. Shaheen quickly recognized their shared genealogy to the portrayals of other racialized groups including Jews, Native Americans, Asian Americans, Latinos, and African Americans. Always in the spirit of engaged dialogue, he was outspoken in defense of any group that was wrongfully stereotyped and vilified.</jats:p
Optimization of the Al-Shaheen Field Performance using Smart Well Technology
No full textThis MSc thesis reports the results on optimizing the Al-Shaheen field performance using smart well technology. The field is currently being developed by Maersk Oil and Gas (MOG) offshore Qatar, using large-scale water injection on very long horizontal wells. The studied reservoir consists of a laterally uniform, tight matrix. However, undesired water short-circuiting between injectors and producers due to localized heterogeneity leads to reduced sweep efficiency and increased water production, thereby reducing the economic life of approximately 10% of the wells. Smart well technology combines monitoring and control capabilities with multi-segment completions in order to optimize flooding mechanisms. In this study two different optimization strategies were simulated on a sector model containing different level of heterogeneity. The first method comprised a reactive, measurement-based approach, where injection segments were shut-in when increased water production was observed in production segments. The second method comprised a proactive, model-based approach where the optimal shut-in timing of injection segments was obtained from gradient information. The evaluated flooding mechanisms include water injection and Water-Alternating-Gas (WAG) injection. Results show optimization with smart well technology can significantly improve recovery and reduce water and gas circulation under varying conditions of reservoir heterogeneity. The measurement-based optimization confirms that the technology can improve reservoir engineering by its increased downhole monitoring capabilities. Results from measurement-based optimization approach the optimum found by model-based optimization.Section Petroleum EngineeringCivil Engineering and Geoscience
The Role of Financial Development in Innovation: Panel Data Analysis of Asian Economies
No full textIn this study author has attempted to investigate the effect of development of financial system on innovation score in selected Asian Economies. Two dimensions of the financial system have been studied in this research. These include development of financial intermediaries, measured by private sector credit as percentage of gross domestic product and development of financial markets, measured by market capitalization as percentage of gross domestic product. Annual data of 29 economies has been collected from year 2011-2022. In addition to the main independent variables, six control variables have been included namely control over corruption, gross domestic product, inflation rate, internet usage, trade balance and covid. Multiple regression analysis has been employed to achieve the research objectives. Empirical analysis reveals that private sector credit affects innovation positively while financial markets development affects innovation negatively. This leads to conclusion that during boom periods of stock markets, only bigger and stable firms enjoy benefits while small unlisted firms pursuing innovative projects get benefit from development of financial intermediaries. Control over corruption, GDP, inflation rate and trade balance are also significant and positive, which is in accordance with expected signs. However, internet usage has appeared insignificant. Covid variable also is not statistically significant. This suggests that, businesses may not have encountered significant challenges in innovative projects during the covid period relative to non-covid periods. On the basis of empirical analysis, it is recommended that government should strengthen financial institutions to enhance capacity of innovation and policy makers should make policies favoring international trade to facilitate innovation-based projects in the countries
2018 Carr Wildfire Evacuation Survey Data
No full textFollowing the 2018 Carr Wildfire, an online survey was distributed by researchers from the University of California, Berkeley to collect information on the individual choices of those impacted by the fires in the Redding, California area. Collected from March to April 2019, the data includes questions regarding risk perceptions, communications, evacuation decisions, potential usage of the sharing economy in disasters, opinions of evacuation management, and demographic information. The survey was distributed with the assistance of local partners (i.e., transportation agencies, emergency management agencies, local city and county governments, CBOs, and news outlets). Partners were allowed to post the survey using electronic communication methods including but not limited to: Facebook, Twitter, Nextdoor, agency websites, news websites, email listservs, and alert subscription services. The survey received 647 valid responses, of which 338 were completed. Subsequent papers using this data retained 284 cleaned survey responses for discrete choice modeling, based on the respondents' completion of key choice and demographic questions. The survey was incentivized with the chance to win one of ten $200 gift cards. The survey questions are included in a separate Word document.
We request that those who download the data send a courtesy email to the lead author, Dr. Stephen Wong ([email protected]). To ensure that any new research makes unique contributions to knowledge and does not duplicate past analyses, users are requested to read and cite publications using this data including:
Wong, S., Broader, J., Walker, J. & Shaheen, S. (2021). Understanding California Wildfire Evacuee Behavior and Joint Choice-Making. Retrieved from https://escholarship.org/uc/item/4fm7d34j
Wong, S., Walker, J., & Shaheen, S. (2020). Role of Trust and Compassion in Resource Sharing in Evacuations: A Case Study of the 2017 and 2018 California Wildfire. International Journal of Disaster Risk Reduction. https://www.sciencedirect.com/science/article/abs/pii/S2212420920314023
Wong, S., Broader, J., Shaheen, S. (2020). Review of California Wildfire Evacuations from 2017 to 2019. Retrieved from https://escholarship.org/uc/item/5w85z07g
Wong, S. & Shaheen, S. (2019). Current State of the Sharing Economy and Evacuations: Lessons from California. SB 1 Report. Retrieved from https://escholarship.org/uc/item/16s8d37x
Additional framing work on evacuations can be found here:
Wong, S. (2020). Compliance, Congestion, and Social Equity: Tackling Critical Evacuation Challenges through the Sharing Economy, Joint Choice Modeling, and Regret Minimization. University of California, Berkeley. Dissertation. https://escholarship.org/uc/item/9b51w7h6These data were made possible through funding received by the University of California Institute of Transportation Studies from the State of California via the Public Transportation Account and the Road Repair and Accountability Act of 2017 (Senate Bill 1). The authors would like to thank the State of California for its support of university-based research, and especially for the funding received for this project
Corrigendum to “Thermoresponsive nanofibers loaded with antimicrobial α-aminophosphonate-o/w emulsion supported by cellulose nanocrystals for smart wound care patches” [Int. J. Biol. Macromol. 233 (2023) 123655–123667] (International Journal of Biological Macromolecules (2023) 233, (S0141813023005482), (10.1016/j.ijbiomac.2023.123655))
No full textThe authors regret the wrong description of the affiliation for the third author (Dr. Tharwat I. Shaheen). He is affiliated with the Textile Research and Technology Institute, National Research Centre, Dokki, Giza, Egypt (letter c) not the Chemistry Department, Faculty of Science, New Mansoura University, New Mansoura City, Egypt (letter d). The letter c should be associated with his name, not d. The authors would like to apologise for any inconvenience caused
Early presynaptic and late postsynaptic components contribute independently to Brain-Derived Neurotrophic Factor-induced synaptic plasticity
No full textTrophin-induced synaptic plasticity consists of both presynaptic and postsynaptic processes. The potential interdependence of these mechanisms and their temporal relationships are undefined. The synaptic vesicle protein Rab3A is required for the early, initial 10 min phase, but not for the later phase of BDNF-enhanced transmission. We now examine the temporal distinction and mechanistic relationships between these phases of BDNF action. Rab3A mutant cells did not exhibit increased mEPSC frequency in response to BDNF in cell culture, indicating absence of the presynaptic component. In contrast, BDNF enhanced post-synaptic glutamate-induced current in the mutant neurons as in the wildtype, indicating that the postsynaptic component of the response was intact. Finally, the postsynaptic NMDA receptor subunit NR2B was phosphorylated at Tyr1472 by BDNF in Rab3A knockouts, as previously shown in wildtype. Our results are the first to demonstrate that presynaptic and postsynaptic components of BDNF-enhanced synaptic activity are independent and temporally distinct.Peer reviewe
2017 December California Wildfires Evacuation Survey Data
No full textFollowing the December Southern California Wildfires in 2017, an online survey was distributed by researchers from the University of California, Berkeley to collect information on the individual choices of those impacted by the fires in California. Collected from March to July 2018, the data includes questions regarding risk perceptions, communications, evacuation decisions, potential usage of the sharing economy in disasters, opinions of evacuation management, and demographic information. The survey was distributed with the assistance of local partners (i.e., transportation agencies, emergency management agencies, local city and county governments, CBOs, and news outlets). Partners were allowed to post the survey using electronic communication methods including but not limited to: Facebook, Twitter, Nextdoor, agency websites, news websites, email listservs, and alert subscription services. The survey received 552 valid responses, of which 303 were completed. Subsequent papers using this data retained 226 cleaned survey responses for discrete choice modeling, based on the respondents' completion of key choice and demographic questions. The survey was incentivized with the chance to win one of five $200 gift cards. The survey questions are included in a separate PDF document.
We request that those who download the data send a courtesy email to the lead author, Dr. Stephen Wong ([email protected]). To ensure that any new research makes unique contributions to knowledge and does not duplicate past analyses, users are requested to read and cite publications using this data including:
Wong, S., Broader, J., Walker, J. & Shaheen, S. (2021). Understanding California Wildfire Evacuee Behavior and Joint Choice-Making. Retrieved from https://escholarship.org/uc/item/4fm7d34j
Wong, S., Walker, J., & Shaheen, S. (2020). Role of Trust and Compassion in Resource Sharing in Evacuations: A Case Study of the 2017 and 2018 California Wildfire. International Journal of Disaster Risk Reduction. https://www.sciencedirect.com/science/article/abs/pii/S2212420920314023
Wong, S., Chorus, C., Shaheen, S. & Walker, J. (2020). A Revealed Preference Methodology to Evaluate Regret Minimization with Challenging Choice Sets: A Wildfire Evacuation Case Study. Travel Behaviour and Society. Retrieved from https://www.sciencedirect.com/science/article/pii/S2214367X19303291
Wong, S., Broader, J., Shaheen, S. (2020). Review of California Wildfire Evacuations from 2017 to 2019. Retrieved from https://escholarship.org/uc/item/5w85z07g
Wong, S. & Shaheen, S. (2019). Current State of the Sharing Economy and Evacuations: Lessons from California. SB 1 Report. Retrieved from https://escholarship.org/uc/item/16s8d37x
Additional framing work on evacuations can be found here:
Wong, S. (2020). Compliance, Congestion, and Social Equity: Tackling Critical Evacuation Challenges through the Sharing Economy, Joint Choice Modeling, and Regret Minimization. University of California, Berkeley. Dissertation. https://escholarship.org/uc/item/9b51w7h6These data were made possible through funding received by the University of California Institute of Transportation Studies from the State of California via the Public Transportation Account and the Road Repair and Accountability Act of 2017 (Senate Bill 1). The authors would like to thank the State of California for its support of university-based research, and especially for the funding received for this project
RETRACTED ARTICLE: Scalpel versus diathermy skin incision in Caesarean section
No full textWe, the Editors and Publisher of the Journal of Obstetrics and Gynaecology, have retracted the following article: Nasser K. AbdElaal, Hamed E. Ellakwa, AllaaEldin F. Elhalaby, AbdElhameed E. Shaheen & Ahmed H. Aish (2019) Scalpel versus diathermy skin incision in Caesarean section, Journal of Obstetrics and Gynaecology, 39:3, 340-344, DOI: 10.1080/01443615.2018.1527298 Subsequent to publication, it has been determined that the article contains significant overlap with the following article by the same authors, which was not cited or referenced: AbdElaal Nasser K, Ellakwa Hamed E, Elhalaby AllaaEldin F, Shaheen AbdElhameed E, Aish Ahmed H (2019). Scalpel versus diathermy skin incisions in cesarean sections, Menoufia Medical Journal, 32:2, 453-457. The corresponding author listed in this publication has been informed. The authors have agreed to retract the article. We have been informed in our decision-making by our policy on publishing ethics and integrity and the COPE guidelines on retractions. The retracted article will remain online to maintain the scholarly record, but it will be digitally watermarked on each page as ‘Retracted’
Phase Behavior and Interfacial Properties of Salt-Tolerant Polymers: Insights from Molecular Dynamics Simulations
No full textThe author thanks the Supercomputer Shaheen at King Abdullah University of Science & Technology (KAUST) in Thuwal, Saudi Arabia, for the use of its computational resources
A neuron-glial model of exosomal release in the onset and progression of Alzheimer's disease
No full textExosomes are nano-sized extracellular vesicles that perform a variety of biological functions linked to the pathogenesis of various neurodegenerative disorders. In Alzheimer's disease (AD), for examples, exosomes are responsible for the release of Aβ oligomers, and their extracellular accumulation, although the underpinning molecular machinery remains elusive. We propose a novel model for Alzheimer's Aβ accumulation based on Ca2+-dependent exosome release from astrocytes. Moreover, we exploit our model to assess how temperature dependence of exosome release could interact with Aβ neurotoxicity. We predict that voltage-gated Ca2+ channels (VGCCs) along with the transient-receptor potential M8 (TRPM8) channel are crucial molecular components in Alzheimer's progression
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