Measurements of sonic booms generated by an airplane flying at Mach 3.5 and 4.8

Sonic booms generated by the X-15 airplane flying at Mach numbers of 3.5 and 4.8 were measured. The experimental results agreed within 12 percent with results obtained from theoretical methods. No unusual phenomena related to overpressure were encountered. Scaled data from the X-15 airplane for Mach 4.8 agreed with data for an SR-71 airplane operating at lower Mach numbers and similar altitudes. The simple technique used to scale the data on the basis of airplane lift was satisfactory for comparing X-15 and SR-71 sonic boom signatures

Micrometre-scale refrigerators

A superconductor with a gap in the density of states or a quantum dot with discrete energy levels is a central building block in realizing an electronic on-chip cooler. They can work as energy filters, allowing only hot quasiparticles to tunnel out from the electrode to be cooled. This principle has been employed experimentally since the early 1990s in investigations and demonstrations of micrometre-scale coolers at sub-kelvin temperatures. In this paper, we review the basic experimental conditions in realizing the coolers and the main practical issues that are known to limit their performance. We give an update of experiments performed on cryogenic micrometre-scale coolers in the past five years

Leadership for Policy Change

Provides options for utilizing foundation and government support to create and enhance community-based leadership development programs in communities of color

Bibliography of technical reports : 1988

The technical reports prepared by the Woods Hole Oceanographic Institution in 1988 are listed in this bibliography

Brief Note Cattle Egret Nesting in Western Lake Erie

Author Institution: Department of Zoology, Ohio State Universit

Brief Note Cattle Egret Nesting in Western Lake Erie

Author Institution: Department of Zoology, Ohio Universit

Review and appraisal - Cost-benefit analyses of earth resources survey satellite systems

Review and assessment of documents concerning cost and benefits of ERS satellites, and value of these studies in directing R and D activitie

Bibliography of technical reports, 1990

The technical reports prepared by the Woods Hole Oceanographic Institution in 1990 are listed in this bibliography

Crossing Over: A Description of Dual Status Youth in Taylor County, Texas

This study explores and describes the experiences of ten dual status youth in Taylor County, Texas by examining the factors of race, sex, child welfare allegation, and juvenile justice offense. A review of the literature suggests that this population has unique challenges in and outside the courtroom, including being at increased risk for disparate outcomes in later adolescence and adulthood. This study compared single-system child welfare and juvenile justice data from Texas DFPS Region 2 and Taylor County to raw data provided on a sample of ten dual status youth identified in Taylor County from 2017–2021. Findings included a disproportionately higher representation of males and youth of color in the dual status group. Regarding child welfare allegations, Refusal to Accept Parental Responsibility allegations were associated with 50% of the dual status group, but less than 1% of all removals in Taylor County over the same time period. Regarding juvenile offenses, felonies and misdemeanors accounted for 95% of offenses in the dual status group, compared to 86% of all offenses in Taylor County over the same time period. This study is significant because it provides important data for professionals in and around the juvenile justice and child welfare systems in Taylor County to utilize when choosing the best evidence-based practices and interventions with this unique population. Additional implications of this study for policy, practice, and research are provided