6,994 research outputs found
Adolescent Social Networks and Violence in Rural Colombia
This dissertation examines violence in adolescent social networks in the context of a rural and resource-limited community in the Caribbean region of Colombia. Utilizing mixed methods data (focus groups and surveys) from 242 school-enrolled adolescents, three empirical studies explored adolescent violence experiences in their community, school, and intimate partner violence relationships. Study one utilizes a social complexity framework and mixed methods design to address victimization. Social network data showed that adolescents\u27 psychological and physical violence victimizations occurred across their community, household, school, and emotionally adverse relationships; and were more likely in girl-nominated relationships, a relationship that shared more alters or included an adult. Qualitative findings highlight cycles of violence that were salient across inter-generational and community settings. Cultural beliefs about violence emerged as critical to consider, particularly as participants perceived differential effects and values of victimization by gender and age.
The second study builds on the previous findings by concentrating on school peer violence perpetration. Results show that psychological and physical violence perpetration status is not related to being socially connected to similar perpetration status peers. Adolescent victims of school peer violence were more likely to engage in perpetration (both psychological and physical) than non-victims controlling for non-school victimization (e.g., community, household), age, and academic standing, ethnicity, and gender. Adolescents who engaged in physical violence perpetration were more likely to live with non-parental caregivers (than those living with one or both parents) and report multiple cross-gender friendships at school.
Study three centers on school peers\u27 social network influence on physical intimate partner violence (IPV) engagement. Results show that adolescents with higher proportions of socially connected peers who perpetrate IPV are more likely to report perpetration, controlling for gender, age group, social network position, and school victimization. Conversely, adolescents with a higher proportion of IPV victim friends are less likely to report victimization. Bidirectional violence in the partnership was associated with the opposite status, such that victims were more likely to be perpetrators in the same relationship and vice versa. IPV engaged adolescents were not more likely to be socially connected to school peers of similar status, than expected by chance.
Finally, the last paper describes how Community-Engaged Research (CEnR) approaches were used to develop, implement, and guide the dissemination and protocols for my study
Beyond the paint and ink: ASAR Oaxaca resistance and getting up Arte Pal Pueblo
This thesis aims to address the ways in Oaxacan street artists frame alternative realities within art and interviews about their art. Asamblea de Artistas Revolucionarios de Oaxaca or ASARO, is a revolutionary artist collective that currently works in Oaxaca Mexico. They place their art in publically accessible areas and comment on local, national and international social issues. Through ethnographic interviews and participant observation with members of ASARO along with critical discourse analysis of their images, I explore the ways getting up is accomplished. The combination of ethnographic field work paired with a critical approach deepens an understanding of what influences modern communication production through art in a marginalized area of Mexicos periphery. In this thesis ideas of art as transformative, legible, accessible are explored. Also Mexican local and global issues such as immigration, iconography, collective action, women\u27s and human rights, exploitation of workers and natural resources are also analyzed within images created by ASARO
On the Nature of Fossil Galaxy Groups: Are they really fossils ?
We use SDSS-DR4 photometric and spectroscopic data out to redshift z~0.1
combined with ROSAT All Sky Survey X-ray data to produce a sample of
twenty-five fossil groups (FGs), defined as bound systems dominated by a
single, luminous elliptical galaxy with extended X-ray emission. We examine
possible biases introduced by varying the parameters used to define the sample
and the main pitfalls are discussed. The spatial density of FGs, estimated via
the V/V_ MAX} test, is 2.83 x 10^{-6} h_{75}^3 Mpc^{-3} for L_x > 0.89 x 10^42
h_{75}^-2 erg/s consistent with Vikhlinin et al. (1999), who examined an X-ray
overluminous elliptical galaxy sample (OLEG). We compare the general properties
of FGs identified here with a sample of bright field ellipticals generated from
the same dataset. These two samples show no differences in the distribution of
neighboring faint galaxy density excess, distance from the red sequence in the
color-magnitude diagram, and structural parameters such as a and internal
color gradients. Furthermore, examination of stellar populations shows that our
twenty-five FGs have similar ages, metallicities, and -enhancement as
the bright field ellipticals, undermining the idea that these systems represent
fossils of a physical mechanism that occurred at high redshift. Our study
reveals no difference between FGs and field ellipticals, suggesting that FGs
might not be a distinct family of true fossils, but rather the final stage of
mass assembly in the Universe.Comment: 18 pages, Accepted to A
A Visual Zooarchaeology Guide for Florida Artifacts
One key factor of archeology research is discovering the faunal bones at excavation sites and seeing what lived many years ago. Faunal remains are bones, hair, shells, and more, any piece of animal anatomy. Discovering the different types of bones at excavations in Florida can give archeologists a sense of the different species in this state that were utilized by humans in the past. This study is creating a visual guide and key for faunal bone artifacts in south Florida. The key will consist of photos of bone artifacts excavated in south Florida of different types of fish and other animals. Also, the key will describe the bones excavated so that people and scientists can know what the defining characteristics of different bones are. Creating this key will be helpful for any other researcher to teach how to identify archaeological bone
Verification Testing To Confirm VO2max Attainment in Inactive Women With Obesity
International Journal of Exercise Science 13(4): 1448-1458, 2020. Incidence of obesity is increasing worldwide which is deleterious to health due to its association with increased risk of cardiovascular disease, diabetes, and some cancers. Completion of regular physical activity in individuals with obesity increases maximal oxygen uptake (VO2max). However, whether individuals with obesity can exhibit ‘true’ VO2max is unresolved. This study examined efficacy of verification testing (VER) to identify ‘true’ VO2max in 17 inactive women with obesity (age, body fat, and VO2max = 37 ± 10 yr, 48.7 ± 3.5 %, and 19.4 ± 3.0 mL/kg/min, respectively). They performed ramp exercise (RAMP) to volitional fatigue followed by VER at 105 percent peak power output (%PPO) at baseline and after 3 and 6 wk of high intensity interval training. Results showed no difference in ramp and verification-derived VO2max (1.99 ± 0.37 L/min vs. 1.98 ± 0.32 L/min, 2.00 ± 0.40 L/min vs. 2.04 ± 0.38 L/min, and 2.08 ± 0.34 L/min vs. 2.08 ± 0.32 L/min at 0, 3 and 6 wk of training), although in 40 % of VER tests, VO2max was greater than the RAMP value. Overall, verification testing may be adopted as an additional approach to confirm ‘true’ VO2max attainment in obese women as ramp exercise frequently underestimates VO2max in this population
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A three-year multifaceted intervention to prevent obesity in children of Mexican-heritage.
BackgroundObesity and overweight have increased dramatically in the United States over the last decades. The complexity of interrelated causal factors that result in obesity needs to be addressed within the cultural dynamic of sub-populations. In this study, we sought to estimate the effects of a multifaceted, community-based intervention on body mass index (BMI) among Mexican-heritage children.MethodsNiños Sanos, Familia Sana (Healthy Children, Healthy Family) was a quasi-experimental intervention study designed to reduce the rate of BMI growth among Mexican-heritage children in California's Central Valley. Two rural communities were matched based on demographic and environmental characteristics and were assigned as the intervention or comparison community. The three-year intervention included parent workshops on nutrition and physical activity; school-based nutrition lessons and enhanced physical education program for children; and a monthly voucher for fruits and vegetables. Eligible children were between 3 and 8 years old at baseline. Intent-to-treat analyses were estimated using linear mixed-effect models with random intercepts. We ran a series of models for each gender where predictors were fixed except interactions between age groups and obesity status at baseline with intervention to determine the magnitude of impact on BMI.ResultsAt baseline, mean (SD) BMI z-score (zBMI) was 0.97 (0.98) in the intervention group (n = 387) and 0.98 (1.02) in the comparison group (n = 313) (NS). The intervention was significantly associated with log-transformed BMI (β = 0.04 (0.02), P = 0.03) and zBMI (β = 0.25 (0.12), P = 0.04) among boys and log-transformed BMI among obese girls (β = - 0.04 (0.02), P = 0.04). The intervention was significantly and inversely associated with BMI in obese boys and girls across all age groups and normal weight boys in the oldest group (over 6 years) relative to their counterparts in the comparison community.ConclusionsA community-based, multifaceted intervention was effective at slowing the rate of BMI growth among Mexican-heritage children. Our findings suggest that practitioners should consider strategies that address gender disparities and work with a variety of stakeholders to target childhood obesity.Trial registrationclinicaltrials.gov Identifier: NCT01900613 . Registered 16th July 2013
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