Addressing Challenges to the Reliable, Large-Scale Implementation of Effective School Health Education

The long-held priority of teaching young people the knowledge and skills needed for healthy living has recently been diminished in many preK-12 schools. Driven by federal and state priorities, laws, and policies associated with high-stakes testing, instruction in untested subjects has been reduced or eliminated in most schools in order to devote more attention to tested subjects, like reading, math, writing, and science. This article proposes a pathway to ensure that all children are able to learn what society knows about health. To that end, four challenges to the reliable, large-scale implementation of effective school health education are identified: (1) establishing school health education as an undeniable social and cultural priority through improved advocacy; (2) strengthening educational institutions’ capacities to reliably deliver large-scale, high-quality, school-based health education; (3) collaboratively coordinating efforts of health-promoting governmental and nongovernmental organizations that generate thought leadership for school health education; and (4) creating multidisciplinary research capacities for solving problems associated with the implementation of reliable, large-scale, effective school health education. By implementing specific strategies associated with each challenge, health educators can promote the social and system-level conditions required to support, elevate, and ensure delivery of effective health education to every student in every school every year

Single-photon emitting diode in silicon carbide

Electrically driven single-photon emitting devices have immediate applications in quantum cryptography, quantum computation and single-photon metrology. Mature device fabrication protocols and the recent observations of single defect systems with quantum functionalities make silicon carbide (SiC) an ideal material to build such devices. Here, we demonstrate the fabrication of bright single photon emitting diodes. The electrically driven emitters display fully polarized output, superior photon statistics (with a count rate of $>$300 kHz), and stability in both continuous and pulsed modes, all at room temperature. The atomic origin of the single photon source is proposed. These results provide a foundation for the large scale integration of single photon sources into a broad range of applications, such as quantum cryptography or linear optics quantum computing.Comment: Main: 10 pages, 6 figures. Supplementary Information: 6 pages, 6 figure

Martin Luther’s School of the Cross

This paper makes the case that a concept called “the school of the cross”exists in Martin Luther’s theology and that it is helpful for understanding Luther’s views of sanctification and Christian progress. This “school of the cross” (scola crucis in Latin) is both textual and contextual: textual, because it comes directly from Luther’s personal history and writings; contextual, because it brings together many frequently hard-to-connect pieces of Luther’s theology. Additionally, Luther’s school of the cross engages personal, communal, and dynamic aspects of life together. As the paper shows, this scola crucis fosters a theology of experience that has room for suffering, wonder, and joy and invites lifelong growth in empathy, hope, and courage

'It's a big deal, being given a person': why people who experience infertility may choose not to adopt

This article explores why individuals and couples who experience infertility and undergo treatment through new technologies do not subsequently go on to become parents via adoption. It does this in three ways: a review of the literature; interviews with those affected; and an online survey of views on adoption among people who have experienced infertility. It was found that couples do consider adoption alongside infertility treatment but it is usually a fallback choice. If adoption is to be perceived as an equal option, agencies need to offer support and advice at an earlier stage than is usual. Couples who are emotionally exhausted by medical interventions for their childlessness can then be helped off the infertility treadmill in order to become parents

Improvements in acoustic doppler velocimetery

Proceedings of the Seventh International Conference on Hydroscience and Engineering, Philadelphia, PA, September 2006. http://hdl.handle.net/1860/732Acoustic velocimeters have become popular for measuring turbulent and mean flows in fluid mechanics laboratories. A series of tests were conducted to evaluate the performance of several acoustic velocimeters at low signal to noise ratios (SNR) to assess the accuracy of mean flow estimates, and at typical SNR in response to tilting of the velocimeter head with respect to the flow. Tests were conducted in an open channel flow with Particle Imaging Velocimetery (PIV) measurements made for comparison and assessment of flow disturbance around the head. While limited in the scope of its assessment, this study shows large improvements have been made in the performance of acoustic velocimeters since their introduction in the early 1990s

Detection of bearing damage by statistic vibration analysis

The condition of bearings, which are essential components in mechanisms, is crucial to safety. The analysis of the bearing vibration signal, which is always contaminated by certain types of noise, is a very important standard for mechanical condition diagnosis of the bearing and mechanical failure phenomenon. In this paper the method of rolling bearing fault detection by statistical analysis of vibration is proposed to filter out Gaussian noise contained in a raw vibration signal. The results of experiments show that the vibration signal can be significantly enhanced by application of the proposed method. Besides, the proposed method is used to analyse real acoustic signals of a bearing with inner race and outer race faults, respectively. The values of attributes are determined according to the degree of the fault. The results confirm that the periods between the transients, which represent bearing fault characteristics, can be successfully detected

Texas Parks & Wildlife

Magazine discussing natural resources, parks, hunting and fishing, and other information related to the outdoors in Texas

Texas Parks & Wildlife

Magazine discussing natural resources, parks, hunting and fishing, and other information related to the outdoors in Texas

The spinorial geometry of supersymmetric heterotic string backgrounds

We determine the geometry of supersymmetric heterotic string backgrounds for which all parallel spinors with respect to the connection $\hat\nabla$ with torsion $H$, the NS$\otimes$NS three-form field strength, are Killing. We find that there are two classes of such backgrounds, the null and the timelike. The Killing spinors of the null backgrounds have stability subgroups K\ltimes\bR^8 in $Spin(9,1)$, for $K=Spin(7)$, SU(4), $Sp(2)$, $SU(2)\times SU(2)$ and $\{1\}$, and the Killing spinors of the timelike backgrounds have stability subgroups $G_2$, SU(3), SU(2) and $\{1\}$. The former admit a single null $\hat\nabla$-parallel vector field while the latter admit a timelike and two, three, five and nine spacelike $\hat\nabla$-parallel vector fields, respectively. The spacetime of the null backgrounds is a Lorentzian two-parameter family of Riemannian manifolds $B$ with skew-symmetric torsion. If the rotation of the null vector field vanishes, the holonomy of the connection with torsion of $B$ is contained in $K$. The spacetime of time-like backgrounds is a principal bundle $P$ with fibre a Lorentzian Lie group and base space a suitable Riemannian manifold with skew-symmetric torsion. The principal bundle is equipped with a connection $\lambda$ which determines the non-horizontal part of the spacetime metric and of $H$. The curvature of $\lambda$ takes values in an appropriate Lie algebra constructed from that of $K$. In addition $dH$ has only horizontal components and contains the Pontrjagin class of $P$. We have computed in all cases the Killing spinor bilinears, expressed the fluxes in terms of the geometry and determine the field equations that are implied by the Killing spinor equations.Comment: 73pp. v2: minor change