Quantitative Analysis of Disparities in Juvenile Delinquency Referrals

Minority youths in Anchorage are referred to the Alaska Division of Juvenile Justice (DJJ) for delinquent behavior at rates much higher than white youths. This report, presenting the first findings from an extended examination of extended examination of race, ethnicity, and juvenile justice in Anchorage, provides a broad overview of the level of disproportionate minority contact in the Alaska juvenile justice system and examines whether disproportionate minority contact occurs (1) for all minority youth, (2) for both males and females, (3) for both youth referred for new crimes and youth referred for conduct or probation violations, and (4) throughout the Municipality of Anchorage or in specific geographical areas within the Municipality of Anchorage. By developing a detailed understanding of the scope of disproportionate minority contact, we become much better prepared to identify its causes and to develop promising evidence-based solutions. The sample in this analysis includes 1,936 youths who resided in Anchorage and were referred to DJJ in Anchorage during fiscal year 2005 for new crimes, probation violations, or conduct violations.National Institute of Justice Grant No. 2005-IJ-CX-0013Table and Figures / Acknowledgments / Executive Summary / Quantitative Analysis of Disparities in Juvenile Delinquency Referrals / Sample and Data / Geographic Data / Census Data / Juvenile Justice Data / Analysis / Results / Racial, Ethnic, and Gender Composition of Referred Youth / Disproportionate Minority Contact in Anchorage / Rates of Referral by Census Tract / Disproportionate Minority Contact by Census Tract / Disproportionate Minority Contact by Census Tract, for All Minority Youth / Disproportionate Minority Contact by Census Tract, for Black Youth / Disproportionate Minority Contact by Census Tract, for Native Youth / Disproportionate Minority Contact by Census Tract, for Asian Youth / Disproportionate Minority Contact by Census Tract, for Pacific Youth / Disproportionate Minority Contact by Census Tract, for Other Minority Youth / Disproportionate Minority Contact by Census Tract, for Multiracial Youth / Disproportionate Minority Contact by Census Tract, for Hispanic Youth / Summary of DMC Analyses by Census Tract / Summary and Conclusion / Appendices A. Technical Notes on Relative Rate Indices B. Technical Notes on Relative EB Rate Indices C. Type of Analysis by Census Trac

Final Report: Anchorage Disproportionate Minority Contact Study

This project examined disproportionate minority contact in Anchorage, Alaska. It was designed to provide a more nuanced understanding of disproportionate minority contact at the referral stage (when law enforcement officers refer youth to the Alaska Division of Juvenile Justice). To do so, we relied on community involvement and utilized different statistical techniques to examine the geography and development of disproportionate minority contact. Researchers partnered with practitioners from the Anchorage Disproportionate Minority Contact Initiative to structure the research process and to interpret and disseminate results. Geographic analyses were conducted to examine where the highest levels of disproportionate minority contact were occurring and longitudinal analyses were conducted to examine at what age disproportionate minority contact began. These analyses provided an understanding of disproportionate minority contact that was obscured when examining relative rate indices. Geographic analyses, for example, revealed high levels of disproportionate minority contact for Pacific youth (a group that would have traditionally been ignored because of its ‘small population’). Longitudinal analyses revealed that disproportionate minority contact began at age 13. Although relative rate indices are useful to identify broad patterns in disproportionate minority contact, they are less useful to drive action. We overcame this limitation with strong community partnerships and different statistical methods for disproportionate minority contact research. In the end, practitioners and researchers used data and research to develop strategic plans to reduce disproportionate minority contact.National Institute of Justice, Office of Justice Programs, U.S. Department of Justice. Grant No. 2005-IJ-CX-0013I. Disproportionate Minority Contact Table 1. Summary of National Relative Rate Indices, 2005 Figure 1. National Relative Rate Indices for Arrest Stage: 1990-2005 Figure 2. National Relative Rate Indices for Referral Stage: 1990-2005 Table 2. Summary of Relative Rate Indices for FY05 Table 3. Relative Rate Indices by Race Table 4. Relative Rate Indices by Race, Gender, and Type of Referral / II. Community Involvement Table 5. Strategies and Objectives for Anchorage DMC Initiative / III. Geography of Disproportionate Minority Contact Figure 3. Census Tracts in Municipality of Anchorage Table 6. Composition of Census Tracts by Race Figure 4. EB Rates of Referral by Race Table 7. EB Rates of Referral by Race Figure 5. Relative EB Rate Indices by Race Table 8. Distribution of Relative EB Rate Indices by Race Table 9. Descriptive Statistics for Relative EB Rate Indices by Race Figure 6. Minority Group with Highest Relative EB Rate Index / IV. Development of Disproportionate Minority Contact Table 10. Total Number of Charges for Anchorage Cohort, Age 10-17 Table 11. Age at First Charge for Anchorage Cohort Table 12. Racial Composition of Cohort and Population At-Risk Table 13. Bayesian Information Criterion Statistics Table 14. Predicted Average Referral Rates Table 15. Characteristics of Developmental Trajectories Figure 7. Predicted Average Referral Rates: Five-Group Model Table 16. Demographic Composition of Developmental Trajectories Figure 8. Predicted Group Membership Probabilities by Rac

Simultaneous noninvasive recording of skin sympathetic nerve activity and electrocardiogram

BACKGROUND: Sympathetic nerve activity is important to cardiac arrhythmogenesis. OBJECTIVE: The purpose of this study was to develop a method for simultaneous noninvasive recording of skin sympathetic nerve activity (SKNA) and electrocardiogram (ECG) using conventional ECG electrodes. This method (neuECG) can be used to adequately estimate sympathetic tone. METHODS: We recorded neuECG signals from the skin of 56 human subjects. The signals were low-pass filtered to show the ECG and high-pass filtered to show nerve activity. Protocol 1 included 12 healthy volunteers who underwent cold water pressor test and Valsalva maneuver. Protocol 2 included 19 inpatients with epilepsy but without known heart diseases monitored for 24 hours. Protocol 3 included 22 patients admitted with electrical storm and monitored for 39.0 ± 28.2 hours. Protocol 4 included 3 patients who underwent bilateral stellate ganglion blockade with lidocaine injection. RESULTS: In patients without heart diseases, spontaneous nerve discharges were frequently observed at baseline and were associated with heart rate acceleration. SKNA recorded from chest leads (V1-V6) during cold water pressor test and Valsalva maneuver (protocol 1) was invariably higher than during baseline and recovery periods (P < .001). In protocol 2, the average SKNA correlated with heart rate acceleration (r = 0.73 ± 0.14, P < .05) and shortening of QT interval (P < .001). Among 146 spontaneous ventricular tachycardia episodes recorded in 9 patients of protocol 3, 106 episodes (73%) were preceded by SKNA within 30 seconds of onset. Protocol 4 showed that bilateral stellate ganglia blockade by lidocaine inhibited SKNA. CONCLUSION: SKNA is detectable using conventional ECG electrodes in humans and may be useful in estimating sympathetic tone

Masses, radii, and orbits of small Kepler planets : The transition from gaseous to rocky planets

We report on the masses, sizes, and orbits of the planets orbiting 22 Kepler stars. There are 49 planet candidates around these stars, including 42 detected through transits and 7 revealed by precise Doppler measurements of the host stars. Based on an analysis of the Kepler brightness measurements, along with high-resolution imaging and spectroscopy, Doppler spectroscopy, and (for 11 stars) asteroseismology, we establish low false-positive probabilities (FPPs) for all of the transiting planets (41 of 42 have an FPP under 1%), and we constrain their sizes and masses. Most of the transiting planets are smaller than three times the size of Earth. For 16 planets, the Doppler signal was securely detected, providing a direct measurement of the planet's mass. For the other 26 planets we provide either marginal mass measurements or upper limits to their masses and densities; in many cases we can rule out a rocky composition. We identify six planets with densities above 5 g cm-3, suggesting a mostly rocky interior for them. Indeed, the only planets that are compatible with a purely rocky composition are smaller than 2 R ⊕. Larger planets evidently contain a larger fraction of low-density material (H, He, and H2O).Peer reviewedFinal Accepted Versio

Kepler-21b: A 1.6REarth Planet Transiting the Bright Oscillating F Subgiant Star HD 179070

We present Kepler observations of the bright (V=8.3), oscillating star HD 179070. The observations show transit-like events which reveal that the star is orbited every 2.8 days by a small, 1.6 R_Earth object. Seismic studies of HD 179070 using short cadence Kepler observations show that HD 179070 has a frequencypower spectrum consistent with solar-like oscillations that are acoustic p-modes. Asteroseismic analysis provides robust values for the mass and radius of HD 179070, 1.34{\pm}0.06 M{\circ} and 1.86{\pm}0.04 R{\circ} respectively, as well as yielding an age of 2.84{\pm}0.34 Gyr for this F5 subgiant. Together with ground-based follow-up observations, analysis of the Kepler light curves and image data, and blend scenario models, we conservatively show at the >99.7% confidence level (3{\sigma}) that the transit event is caused by a 1.64{\pm}0.04 R_Earth exoplanet in a 2.785755{\pm}0.000032 day orbit. The exoplanet is only 0.04 AU away from the star and our spectroscopic observations provide an upper limit to its mass of ~10 M_Earth (2-{\sigma}). HD 179070 is the brightest exoplanet host star yet discovered by Kepler.Comment: Accepted to Ap

Planetary Candidates Observed by Kepler, III: Analysis of the First 16 Months of Data

New transiting planet candidates are identified in sixteen months (May 2009 - September 2010) of data from the Kepler spacecraft. Nearly five thousand periodic transit-like signals are vetted against astrophysical and instrumental false positives yielding 1,091 viable new planet candidates, bringing the total count up to over 2,300. Improved vetting metrics are employed, contributing to higher catalog reliability. Most notable is the noise-weighted robust averaging of multi-quarter photo-center offsets derived from difference image analysis which identifies likely background eclipsing binaries. Twenty-two months of photometry are used for the purpose of characterizing each of the new candidates. Ephemerides (transit epoch, T_0, and orbital period, P) are tabulated as well as the products of light curve modeling: reduced radius (Rp/R*), reduced semi-major axis (d/R*), and impact parameter (b). The largest fractional increases are seen for the smallest planet candidates (197% for candidates smaller than 2Re compared to 52% for candidates larger than 2Re) and those at longer orbital periods (123% for candidates outside of 50-day orbits versus 85% for candidates inside of 50-day orbits). The gains are larger than expected from increasing the observing window from thirteen months (Quarter 1-- Quarter 5) to sixteen months (Quarter 1 -- Quarter 6). This demonstrates the benefit of continued development of pipeline analysis software. The fraction of all host stars with multiple candidates has grown from 17% to 20%, and the paucity of short-period giant planets in multiple systems is still evident. The progression toward smaller planets at longer orbital periods with each new catalog release suggests that Earth-size planets in the Habitable Zone are forthcoming if, indeed, such planets are abundant.Comment: Submitted to ApJS. Machine-readable tables are available at http://kepler.nasa.gov, http://archive.stsci.edu/kepler/results.html, and the NASA Exoplanet Archiv

Image-Derived Input Function for Human Brain Using High Resolution PET Imaging with [11C](R)-rolipram and [11C]PBR28

The aim of this study was to test seven previously published image-input methods in state-of-the-art high resolution PET brain images. Images were obtained with a High Resolution Research Tomograph plus a resolution-recovery reconstruction algorithm using two different radioligands with different radiometabolite fractions. Three of the methods required arterial blood samples to scale the image-input, and four were blood-free methods. values was quantified using a scoring system. Using the image input methods that gave the most accurate results with Logan analysis, we also performed kinetic modelling with a two-tissue compartment model.)-rolipram, which has a lower metabolite fraction. Compartment modeling gave less reliable results, especially for the estimation of individual rate constants.C]PBR28), the more difficult it is to obtain a reliable image-derived input function; and 4) in association with image inputs, graphical analyses should be preferred over compartmental modelling