Author: "YOUNG, JOHN" - Searchworks@Jio Institute Digital Library Search Results

Author: Wang, Li, Ji, Xueyu, Young, John, Liu, Hao, and Tian, Fang-Bao
Subjects: Physics - Fluid Dynamics
Abstract: Bio-inspired flapping wings have been extensively studied for their remarkable aerodynamic performance. Recently, their noise emission has attracted growing interest, but a careful analysis of scaling laws for their sound generation is missing. This work presents scaling laws for the sound generation of bio-inspired flapping wings during hovering flight based on the potential flow theory and Ffowcs Williams-Hawkings acoustic analogy. Direct numerical simulations considering a range of parameters including the Reynolds number, Mach number and wing kinematics confirms that the proposed scaling laws capture the major physics involved and their predictions agree well with the numerical results. The scaling laws can be used as a powerful tool for engineers in the design of micro-aerial vehicles considering both aerodynamics and acoustics performances simultaneously.
Published: 2024

32. Shadow Archives: The Lifecycles of African American Literature by Jean-Christophe Cloutier (review)

Author: Young, John K.
Published: 2021

33. Risk and protective factors associated with substance use among Puerto Rican youths after Hurricane María: a cross-sectional study

Author: Gonzalez, Juan Carlos, Feinberg, Daniel K, Stewart, Regan W, Young, John, and Orengo-Aguayo, Rosaura
Subjects: Epidemiology, Health Services and Systems, Public Health, Health Sciences, Drug Abuse (NIDA only), Prevention, Minority Health, Clinical Research, Anxiety Disorders, Mental Illness, Health Disparities, Behavioral and Social Science, Mental Health, Social Determinants of Health, Pediatric, Post-Traumatic Stress Disorder (PTSD), Substance Misuse, Climate-Related Exposures and Conditions, Brain Disorders, 3.1 Primary prevention interventions to modify behaviours or promote wellbeing, Good Health and Well Being, Humans, Cross-Sectional Studies, Female, Male, Puerto Rico, Cyclonic Storms, Substance-Related Disorders, Adolescent, Protective Factors, Risk Factors, Social Support, Child, Disasters, Surveys and Questionnaires, Natural disasters, Substance use, Youth/adolescents, Public Health and Health Services, Health services and systems, Public health
Abstract: BackgroundIdentifying factors associated with post-disaster youth substance use is a crucial element of developing evidence-based prevention and intervention efforts. Hurricane María struck Puerto Rico in September of 2017 and the wide-spread impact from this disaster, including exposure to trauma, displacement, and disrupted social supports had the potential to negatively impact levels of substance use among youth across the archipelago. However, post-disaster substance use remains under-investigated in this context. The current study sought to identify risk and protective factors associated with substance use among Puerto Rican youth in the aftermath of Hurricane Maria.MethodsCross-sectional, secondary data analyses were conducted using school-based survey data collected at all schools in Puerto Rico between February 1 and June 29, 2018 (5-9 months after Hurricane María). Social supports, substance use, and trauma symptoms were assessed. An ordinal regression analysis was conducted to identify student factors associated with greater likelihood of post-disaster substance use.ResultsA total of 36,485 participants (50.7% female, grades 7-12), were included in an ordinal regression analysis that compared the likelihood of respondents endorsing high, low, or no substance use after Hurricane María based on reported adult social support, counselor/teacher social support, peer social support, ptsd symptomatology, and gender. Findings showed that, when compared to students that endorsed low or no substance use, those who reported having adult social support demonstrated a 58% reduction in odds (OR = 0.42, 95% CI: 0.34-0.53) of reporting high substance use after Hurricane María, while students who reported having teacher/counselor social support demonstrated a 21% reduction in odds (OR = 0.79, 95% CI: 0.69-0.89) of reporting high substance use. Additionally, those that reported having peer social support demonstrated a 31% increase in odds (OR = 1.31, 95% CI: 1.10 to 1.58) of reporting higher substance use, compared to those that reported low or no substance use.ConclusionsWhile social support was generally protective, prevention efforts to build positive family and community connections may be indicated. Evidence-based school screenings of substance use and trauma may help direct intervention to those most at risk for co-occurring issues.
Published: 2024