8,929 research outputs found

    Hope Measurement in Mexican American Youth

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    Hope is a motivational construct that has been associated with many positive outcomes in children, adolescents, and adults. Although research with the Children’s Hope Scale (CHS) has demonstrated support for the reliability and validity of the CHS with various samples of youth, there is little empirical evidence for its use with Latino youth. The current study examined the psychometric properties of the six-item CHS in a sample of 135 Mexican American youth. Confirmatory factor analyses provided support for a hierarchical representation of the CHS with two underlying factors (pathways and agency). CHS scores were found to be positively correlated with measures of positive affect, life satisfaction, support from family and friends, and optimism. Additional analyses provided evidence supporting convergent validity and measurement invariance across gender. Implications and directions for future research are discussed

    A Citrus Wildfire

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    An American Dream forged by greed. A family caught in the middle of a race war. A young boy trying to learn how to be a man. A Citrus Wildfire is a fiction novella that tells the story of a Mexican family struggling to survive in the Rio Grande Valley after their only source of income burns down, and the lengths they must go to in order to get the life they were promised. A small preface from the author proceeds the work. This novella is inspired by many different authors and educators, as well as the Rio Grande Valley itself. Many writers in the preface call the Rio Grande Valley their home. Learn their voices

    PREDICTING INVASIVE RANGE OF Eucalyptus globulus IN CALIFORNIA

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    Eucalyptus globulus is the subject of intense debate in California. Its invasive potential, aggressive growth, reproductive biology, and association with fire make the prediction of spread important in California. Two modeling simulations, Climex and Maxent, will illustrate the distribution and potential growth range of E. globulus in California based on climate and presence. Modeling the potential range of growth will predict invasive spread. The anticipated result is the continued spread of E. globulus in coastal regions with adequate moisture and suitable climate. Predicting the range of E. globulus in California dictates management strategy and is key for preventing further introduction, establishment, and dispersal

    Exactly Solvable Random Graph Ensemble with Extensively Many Short Cycles

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    We introduce and analyse ensembles of 2-regular random graphs with a tuneable distribution of short cycles. The phenomenology of these graphs depends critically on the scaling of the ensembles' control parameters relative to the number of nodes. A phase diagram is presented, showing a second order phase transition from a connected to a disconnected phase. We study both the canonical formulation, where the size is large but fixed, and the grand canonical formulation, where the size is sampled from a discrete distribution, and show their equivalence in the thermodynamical limit. We also compute analytically the spectral density, which consists of a discrete set of isolated eigenvalues, representing short cycles, and a continuous part, representing cycles of diverging size

    Child labor, school attendance, and indigenous households : evidence from Mexico

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    The authors use panel data for Mexico for 1997 to 1999 to test several assumptions regarding the impact of a conditional cash transfer program on child labor, emphasizing the differential impact on indigenous households. Using data from the conditional cash transfer program in Mexico PROGRESA (OPORTUNIDADES) they investigate the interaction between child labor and indigenous households. While indigenous children had a greater probability of working in 1997, this probability is reversed after treatment in the program. Indigenous children also had lower school attainment compared with Spanish-speaking or bilingual children. After the program, school attainment among indigenous children increased, reducing the gap.Street Children,Children and Youth,Labor Policies,Environmental Economics&Policies,Public Health Promotion,Street Children,Youth and Governance,Environmental Economics&Policies,Children and Youth,Child Labor

    Detection of Carbamazepine, Diclofenac, and Ketoprofen Via a SPE-HPLC-PDA Method in a Municipal Wastewater Treatment Plant in East Texas, USA

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    Pharmaceutical compounds are introduced into the environment and may pose adverse environmental and human health effects. The sources of pharmaceuticals include sewage, animal waste, and/or improper disposal from homes and hospitals. In this study, the spectroscopic, and chromatographic properties of carbamazepine (CBZ), diclofenac (DF), and ketoprofen (KT) were analyzed by using UV-Vis, fluorescence and HPLC. Via UV-VIS spectroscopy, CBZ, DF, and KT exhibited absorption peaks at 285 nm, 284 nm and 255.6 nm, respectively. The determined fluorescence quantum yield (Ff) for CBZ, DF, and KT were Ff = 0.226, 0.287, and 0.327, respectively. Retention times was observed at 3.84 (CBZ), 4.84 (KT), and 9.84 (DF) min. The removal efficiencies is in the range 8.8% (KT) to 39.2% (CBZ). This study is useful for the quantitation of these pharmaceuticals in wastewater treatment plants and possible risks

    The Effects of Sustained Cognitive Dissonance and Perceived Inequity on Employees

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    This paper examines the effects of prolonged states of cognitive dissonance and perceptions of workplace inequity on the employee. Anecdotal feedback was collected from employees within an affluent Connecticut school district where there are two main classes of employees – certified and non-certified. The classes are further differentiated by substantial differences in pay structures, in union representation, and in subsequent collective bargaining agreements

    Two-Way Optical Frequency Comparisons Over 100km Telecommunication Network Fibers

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    By using two-way frequency transfer, we demonstrate ultra-high resolution comparison of optical frequencies over a telecommunication fiber link of 100 km operating simultaneously digital data transfer. We first propose and experiment a bi-directional scheme using a single fiber. We show that the relative stability at 1 s integration time is 7 10^18 and scales down to 5 10^21. The same level of performance is reached when an optical link is implemented with an active compensation of the fiber noise. We also implement a real-time two-way frequency comparison over a uni-directional telecommunication network using a pair of parallel fibers. The relative frequency stability is 10^15 at 1 s integration time and reaches 2 10^17 at 40 000 s. The fractional uncertainty of the frequency comparisons was evaluated for the best case to 2 10^20. These results open the way to accurate and high resolution frequency comparison of optical clocks over intercontinental fiber networks
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