scholarly journals NEO Population, Velocity Bias, and Impact Risk from an ATLAS Analysis

2021 ◽  
Vol 2 (1) ◽  
pp. 12
Author(s):  
A. N. Heinze ◽  
Larry Denneau ◽  
John L. Tonry ◽  
Steven J. Smartt ◽  
Nicolas Erasmus ◽  
...  
Keyword(s):  
Impact Risk ◽  
Velocity Bias

Energy Markets and Trading

2018 ◽  
Author(s):  
David Mares
Keyword(s):  
Fossil Fuels ◽  
Negative Impact ◽  
Adjustment Costs ◽  
Institutional Context ◽  
Energy Markets ◽  
Energy Resources ◽  
Trade Offs ◽  
The Social ◽  
Impact Risk

This chapter discusses the role of energy in economic development, the transformation of energy markets, trade in energy resources themselves, and the geopolitical dynamics that result. The transformation of energy markets and their expansion via trade can help or hinder development, depending on the processes behind them and how stakeholders interact. The availability of renewable, climate-friendly sources of energy, domestically and internationally, means that there is no inherent trade-off between economic growth and the use of fossil fuels. The existence of economic, political, social, and geopolitical adjustment costs means that the expansion of international energy markets to incorporate alternatives to oil and coal is a complex balance of environmental trade-offs with no solutions completely free of negative impact risk. An understanding of the supply of and demand for energy must incorporate the institutional context within which they occur, as well as the social and political dynamics of their setting.

scholarly journals Velocity bias in intrusive gas-liquid flow measurements

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
B. Hohermuth ◽  
M. Kramer ◽  
S. Felder ◽  
D. Valero
Keyword(s):  
Liquid Flow ◽  
Breaking Waves ◽  
Correction Method ◽  
Force Balance ◽  
Bubble Velocity ◽  
Natural Environments ◽  
Flow Measurements ◽  
Gas Liquid Flow ◽  
Liquid Flows ◽  
Velocity Bias

AbstractGas–liquid flows occur in many natural environments such as breaking waves, river rapids and human-made systems, including nuclear reactors and water treatment or conveyance infrastructure. Such two-phase flows are commonly investigated using phase-detection intrusive probes, yielding velocities that are considered to be directly representative of bubble velocities. Using different state-of-the-art instruments and analysis algorithms, we show that bubble–probe interactions lead to an underestimation of the real bubble velocity due to surface tension. To overcome this velocity bias, a correction method is formulated based on a force balance on the bubble. The proposed methodology allows to assess the bubble–probe interaction bias for various types of gas-liquid flows and to recover the undisturbed real bubble velocity. We show that the velocity bias is strong in laboratory scale investigations and therefore may affect the extrapolation of results to full scale. The correction method increases the accuracy of bubble velocity estimations, thereby enabling a deeper understanding of fundamental gas-liquid flow processes.

scholarly journals Velocity bias in the distribution of dark matter halos

2015 ◽  
Vol 92 (12) ◽  
Author(s):  
Tobias Baldauf ◽  
Vincent Desjacques ◽  
Uroš Seljak
Keyword(s):  
Dark Matter ◽  
Dark Matter Halos ◽  
Velocity Bias

Integration of Islamic bank specific risks and their impact on the portfolios of Islamic Banks

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Syed Alamdar Ali Shah ◽  
Raditya Sukmana ◽  
Bayu Arie Fianto
Keyword(s):  
Risk Management ◽  
Portfolio Diversification ◽  
Islamic Banks ◽  
Content Type ◽  
Management Framework ◽  
Risk Return ◽  
Islamic Bank ◽  
Risk Management Framework ◽  
Impact Risk ◽  
Conventional Banks

Purpose This study aims to propose a risk management framework for Islamic banks to address specific risks that are unique to Islamic bank settings. Design/methodology/approach A unique methodology has been developed first by exploring the dynamics and behaviors of various risks unique to Islamic banks. Second, it integrates them through a series of diagrams that show how they behave, integrate and impact risk, returns and portfolios. Findings This study proposes a unique risk-return relationship framework encompassing specific risks faced by Islamic banks under the ambit of portfolio theory showing how Islamic banks establish a steeper risk-return path under Shariah compliance. By doing so, this study identifies a unique “Islamic risk-return” nexus in Islamic settings as an explanation for the concern of contemporary researchers that Islamic banks are more risky than conventional banks. Originality/value The originality of this study is that it extends the scope of risk management in Islamic banks from individual contract-based to an integrated whole, identifying a unique transmission path of how risks affect portfolio diversification in Islamic banks.

Abstract 13379: Cause-specific Mortality by Diffuse Coronary Artery Calcium Phenotypes: Results From the Coronary Artery Calcium Consortium

Circulation ◽  
2020 ◽  
Vol 142 (Suppl_3) ◽  
Author(s):  
Ramzi Dudum ◽  
Zeina A Dardari ◽  
David Feldman ◽  
Daniel Berman ◽  
Matthew J Budoff ◽  
...  
Keyword(s):  
Coronary Artery ◽  
Coronary Artery Calcium ◽  
Subclinical Atherosclerosis ◽  
Clinical Predictors ◽  
Specific Mortality ◽  
Risk Factor Data ◽  
Impact Risk ◽  
Traditional Risk Factors ◽  
Factor Data ◽  
Vessel Involvement

Objectives: We sought to assess characteristics of diffuse coronary artery calcium (CAC) phenotypes and their associations with cause-specific mortality. Background: CAC is a measure of subclinical atherosclerosis and improves risk stratification. CAC characteristics including vessel involvement, number of vessels, volume, and density have been shown to differentially impact risk. Less is known about clinical predictors of a diffuse CAC phenotype and its impact on cause-specific mortality. Methods: The CAC Consortium is a retrospective, multi-site cohort of 66,636 participants without CHD who underwent CAC scoring. Risk factor data were collected at enrollment or scan. Participants with CAC>0 were included—CAC area, CAC density, and the CAC index of diffusion (the percentage of total CAC in the vessel with the highest CAC score) were calculated and the association between CAC characteristics and CVD- and CHD-specific mortality was assessed. Results: In 28,147 study participants (mean age 58.3 years, 25% female, and 89.6% white), ~66% had ≥2 calcified vessels. Diabetes, hypertension, and hyperlipidemia were predictors of multivessel involvement (p<0.001). After controlling for CAC score, those with 4-vessel CAC had more CAC area involved with less dense calcification compared to those with 1-vessel involvement. After adjustment, those with CAC score 1-299 had a graded increase in CVD- and CHD-specific mortality with increasing vessel number compared with 1-vessel CAC. No difference was seen for individuals with CAC >300. Among those with multivessel CAC involvement, all-cause survival was significantly worse in diffuse compared to other phenotypes. Conclusion: Diffuse CAC involvement was characterized by less dense calcification, more CAC area, multiple coronary vessel involvement, and presence of certain traditional risk factors. Multivessel CAC is associated with increased CVD- and CHD-specific mortality, particularly among CAC scores 1-299.

scholarly journals A Case–Control Study of Tackle-Based Concussion Risk Factors in The National Rugby League

2021 ◽  
Author(s):  
Andrew J Gardner ◽  
Grant Iverson ◽  
Suzi Edwards ◽  
Ross Tucker
Keyword(s):  
Head Injury ◽  
Body Position ◽  
Rugby League ◽  
Rugby Union ◽  
Head Impacts ◽  
Game Activity ◽  
Impact Risk ◽  
Injury Assessment ◽  
Control Study ◽  
Recent Evaluation

Abstract Background The tackle is the in-game activity carrying the greatest risk for concussion in Rugby. A recent evaluation of tackle characteristics in Rugby Union precipitated a rule modification to reduce head impact risk during tackles. This study aims to replicate the work conducted in Rugby Union by examining the association between tackle characteristics and head injury events in professional Rugby League. Methods We reviewed and coded 446 tackles resulting in a head injury assessment (HIA) and 5,694 tackles that did not result in a head injury from two National Rugby League (NRL) seasons. Tackle height, body position of players, and contact area on an opponent’s body were evaluated, with the propensity of each situation to cause an HIA calculated as HIAs per 1000 events. Results The propensity for tacklers to sustain a head injury was 0.99 HIAs per 1000 tackles, 1.74-fold greater than for the ball carrier (0.57 HIAs per 1,000 tackles). There was a 3.2-fold higher risk for an HIA when the tackler was upright compared to bent-at-the-waist. The greatest risk of a tackler HIA occurred when head contact was very low (knee, boot) or high (head and elbow). HIAs were most common following head-to-head impacts. The lowest propensity for tackler HIA was found when the tackler’s head was in proximity with the ball carrier’s torso. Conclusions The result of this study replicated the findings in professional rugby union. This has implications for the injury prevention initiatives implemented to reduce HIA risk because the majority of injuries are sustained by the player initiating the action.

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