Peer Acceptance in the Lunchroom and Children’s Internalizing Symptoms

There is evidence to suggest that the context of the school lunchrooms provides children with rich opportunities for enhancing or hampering the quality of their relationships (Craig, Gregus, Elledge, Pastrana, & Cavell, 2016; Steggerda et al., in preparation). Although past research has linked children’s peer acceptance to their level of internalizing symptoms, few studies have examined peer acceptance within the lunchroom context. This study extends that work by examining associations between lunchroom peer acceptance (assessed via self- and peer-reports) and children’s internalizing symptoms. Participants were 676 fourth-grade students (50.7% female; 42.7% Hispanic/Latino, 30.3% White, 10% Pacific Islander, and 17% other) from 10 public schools. I hypothesized that self-reported lunchroom peer acceptance would predict children’s internalizing symptoms over and above peer ratings of lunchroom peer acceptance as well as over more traditional measures of classroom-based social preference. As expected, self-rated lunchtime liking in the fall semester significantly predicted both depressive and social anxiety symptoms in the spring semester of one school year; these predictions were similar for boys versus girls. Implications of findings and future directions for research are discussed

A description of the time interval measurement and laser control circuitry for the lunar ranging experiment

Detector package, laser, and telescopes for lunar ranging experimen

Current status of hepatocellular carcinoma detection: screening strategies and novel biomarkers.

Hepatocellular carcinoma (HCC) remains a major cause of cancer-related mortality worldwide. Delayed diagnosis is a major factor responsible for the poor prognosis of HCC. Several advances have been made in the field of liver imaging with the use of novel imaging contrasts, improving current imaging techniques with contrast-enhanced computed tomography (CT) and magnetic resonance imaging (MRI), introduction of new technologies such as contrast liver ultrasound, and development of novel biomarkers with the goal of early detection of HCC and improving outcomes of patients with HCC. This review focuses on current surveillance strategies and development of biomarkers with the goal of early detection of HCC

The neonatal cerebellum

Newborn infants requiring intensive care treatment are at risk of cerebellar injury. This can have important consequences for long-term neurodevelopmental outcome. The aim of this thesis was to study the incidence and characteristics of cerebellar injury, and to investigate the role of different neuroimaging techniques (cranial ultrasound (CUS) with additional mastoid fontanelle (MF) views and MRI) for its detection in both preterm and high-risk term infants. Part I describes the standard CUS procedure and supplementary imaging techniques to optimize its performance, including the use of additional acoustic windows. Part II focuses on the detection, risk factors and prognostic implications of cerebellar injury in preterm infants. Part III focuses on CUS and MRI findings of posterior fossa abnormalities in full-term infants with various neonatal disorders. Part VI reviews the main findings and conclusions of this thesis, and discusses future perspectives and proposals for further research. Based on the findings of this thesis, we conclude that in both preterm and critically ill full-term infants CUS protocols should include MF views. This enables early detection of most major and clinically relevant posterior fossa abnormalities. Routine MRI for the detection of small hemorrhagic lesions is not warranted, as these lesions have a favorable prognosisUBL - phd migration 201

Time transfer between the Goddard Optical Research Facility and the U.S. Naval Observatory using 100 picosecond laser pulses

A horizontal two-way time comparison link in air between the University of Maryland laser ranging and time transfer equipment at the Goddard Optical Research Facility (GORF) 1.2 m telescope and the Time Services Division of the U.S. Naval Observatory (USNO) was established. Flat mirrors of 25 cm and 30 cm diameter respectively were placed on top of the Washington Cathedral and on a water tower at the Beltsville Agricultural Research Center. Two optical corner reflectors at the USNO reflect the laser pulses back to the GORF. Light pulses of 100 ps duration and an energy of several hundred microjoules are sent at the rate of 10 pulses per second. The detection at the USNO is by means of an RCA C30902E avalanche photodiode and the timing is accomplished by an HP 5370A computing counter and an HP 1000 computer with respect to a 10 pps pulse train from the Master Clock