Urban Fathers Asset Building – Final Report

The Urban Fathers Asset Building (UFAB) project demonstrated the potential benefits, as well as limitations, of an innovative nexus between the child support system, fatherhood programs, and the Assets for Independence (AFI) grant-funded services. UFAB was a collaborative initiative of the Texas Office of the Attorney General (OAG), Baylor College of Medicine’s Teen Health Clinic, Covenant Community Capital Corporation (the local AFI grantee), and RAISE Texas, the statewide association of AFI grantees. This Final Report summarizes UFAB’s operational features and outcomes; depicts the demonstration’s challenges and innovative responses; reviews the accomplishments of the ancillary projects supported by BAFF funds; and assesses the prospects for sustaining demonstration practices in the Houston area, as well as extending promising practices to other areas of the state.Texas Office of the Attorney GeneralRay Marshall Center for the Study of Human Resource

An analysis of the duties of general clerical workers in the General Electric Company

Thesis (M.A.)--Boston University 1949. This item was digitized by the Internet Archive

On the relevance of chaos for halo stars in the Solar Neighbourhood

We show that diffusion due to chaotic mixing in the Neighbourhood of the Sun may not be as relevant as previously suggested in erasing phase space signatures of past Galactic accretion events. For this purpose, we analyse Solar Neighbourhood-like volumes extracted from cosmological simulations that naturally account for chaotic orbital behaviour induced by the strongly triaxial and cuspy shape of the resulting dark matter haloes, among other factors. In the approximation of an analytical static triaxial model, our results show that a large fraction of stellar halo particles in such local volumes have chaos onset times (i.e., the timescale at which stars commonly associated with chaotic orbits will exhibit their chaotic behaviour) significantly larger than a Hubble time. Furthermore, particles that do present a chaotic behaviour within a Hubble time do not exhibit significant diffusion in phase space.Comment: 20 pages, 16 figures. Accepted for publication in MNRA

Urban Fathers Asset Building Initiative: Evaluation Plan

Urban Fathers Asset Building Initiative: Evaluation PlanThe Urban Fathers Asset Building (UFAB) project is demonstrating an innovative nexus between the child support system, fatherhood programs and Assets for Independence (AFI) grant-funded services. UFAB is a collaborative initiative of the Texas Office of the Attorney General, Baylor College of Medicine’s Teen Health Clinic, and Covenant Community Capital Corporation, the local AFI grantee in Houston. UFAB targets low-income, young fathers—a population notably under-served by financial education services regularly provided under AFI—prior to their need for enforcement of child support orders. UFAB intends to recruit and enroll up to 200 new or expectant young fathers who reside in the urban core of Houston, Texas, near the time of the births of their children in order to encourage financial literacy and asset building to become more economically self-sufficient. Simultaneously, the demonstration presents the opportunity to provide information about child support laws and enforcement to the young fathers at this early stage of family formation, as well as to personnel of collaborating entities at the community level. The grant also authorizes OAG to build awareness and support for this and other efforts of OAG’s Child Support Division throughout the state, including Child Support for College and the Bring it Back to Texas program. UFAB involves collaboration at the statewide level between the OAG and RAISE Texas, the statewide association of AFI grantees, for the purpose of disseminating child support information, including family stability initiatives to the grantees and their local partners. The Ray Marshall Center for the Study of Human Resources of the LBJ School of Public Affairs at the University of Texas at Austin has been contracted by OAG as the project evaluator to conduct process and outcomes analyses of UFAB.US Dept of Heath and Human Services' Administration for Children and Families, Office of Child Support Enforcement, Texas Office of the Attorney General, RAISE Texas, Harris County Precinct One, Baylor College of Medicine's Young Fathers/Bootstrap Project, Covenant Community CapitalRay Marshall Center for the Study of Human Resource

Harmonic Generation in a Terawatt X-Ray Free-Electron Laser

Terawatt x-ray free-electron lasers (XFELs) require high current densities with strong transverse focusing. The implications on harmonic generation are discussed using the MINERVA simulation code which self-consistently includes harmonic generation. We consider helical and planar undulators where the fundamental is at 1.5 Angstrom and study the associated harmonic generation. While tapered undulators are needed to reach TW powers at the fundamental, the taper does not enhance the harmonics because the taper must start before saturation of the fundamental, with the harmonics saturating earlier. Nevertheless, the harmonics reach substantial powers and enable enhanced applications.Comment: 4 pages, 4 figure

Optical diode based on the chirality of guided photons

Photons are nonchiral particles: their handedness can be both left and right. However, when light is transversely confined, it can locally exhibit a transverse spin whose orientation is fixed by the propagation direction of the photons. Confined photons thus have chiral character. Here, we employ this to demonstrate nonreciprocal transmission of light at the single-photon level through a silica nanofibre in two experimental schemes. We either use an ensemble of spin-polarised atoms that is weakly coupled to the nanofibre-guided mode or a single spin-polarised atom strongly coupled to the nanofibre via a whispering-gallery-mode resonator. We simultaneously achieve high optical isolation and high forward transmission. Both are controlled by the internal atomic state. The resulting optical diode is the first example of a new class of nonreciprocal nanophotonic devices which exploit the chirality of confined photons and which are, in principle, suitable for quantum information processing and future quantum optical networks

Selecting ultra-faint dwarf candidate progenitors in cosmological N-body simulations at high redshifts

The smallest satellites of the Milky Way ceased forming stars during the epoch of reionization and thus provide archaeological access to galaxy formation at $z>6$. Numerical studies of these ultra-faint dwarf galaxies (UFDs) require expensive cosmological simulations with high mass resolution that are carried out down to $z=0$. However, if we are able to statistically identify UFD host progenitors at high redshifts \emph{with relatively high probabilities}, we can avoid this high computational cost. To find such candidates, we analyze the merger trees of Milky Way type halos from the high-resolution ${\it Caterpillar}$ suite of dark matter only simulations. Satellite UFD hosts at $z=0$ are identified based on four different abundance matching (AM) techniques. All the halos at high redshifts are traced forward in time in order to compute the probability of surviving as satellite UFDs today. Our results show that selecting potential UFD progenitors based solely on their mass at z=12 (8) results in a 10\% (20\%) chance of obtaining a surviving UFD at $z=0$ in three of the AM techniques we adopted. We find that the progenitors of surviving satellite UFDs have lower virial ratios ($\eta$), and are preferentially located at large distances from the main MW progenitor, while they show no correlation with concentration parameter. Halos with favorable locations and virial ratios are $\approx 3$ times more likely to survive as satellite UFD candidates at $z=0.$Comment: 12 pages, 7 figures, accepted for publication at MNRAS after minor revision