158 research outputs found
Victim Offender Overlap in Intimate Partner Violence
Victim offender overlap is a relatively new area of research with most studies having focused on applying this concept to the study of assault and homicide. Research in intimate partner violence has found that there exists a group of victim offenders or individuals who are involved in initiating, sustaining, and engaging in intimate partner violence as both victims and offenders (Johnson & Ferraro, 2000; Steinmetz, 1980). This Masterâs thesis explored the concept of victim offender overlap in connection to intimate partner violence (IPV). Bivariate analyses were conducted using Paul C. Friday, Vivian Lord, M. Lyn Exum, and Jennifer L. Hartmanâs (2003-2005) data, Evaluating the Impact of a Specialized Domestic Violence Police Unit in Charlotte, North Carolina. The findings suggest that there is a separate group of individuals involved in intimate partner violence who are both victims and offenders. Furthermore, the three groups (offenders only of IPV, victims only of IPV, and victim/offenders of IPV) were found to be different across gender, past criminal involvement, and future criminal activity as predicted. Suggestions for future research and the implications of the findings are discussed
That\u27s My Voice! Participation and Democratic Citizenship in the Early Childhood Classroom
This paper shares a participatory action research study conducted by a team of researchers at a university laboratory school in collaboration with three classroom teachers and 60 preschoolers. The team engaged in this research in order to examine the ways in which school personnel could generate more authentic community service experiences with, rather than simply for, children. Findings illustrate that with the support of adults, children generated ways to address issues, discussed their ideas with adults, reflected on their actions, and understood that their voices were being heard beyond the school community. With this increased participation, young people were able to show and exercise crucial skills and dispositions for democratic citizenship
Fluids and Melts at the Magmatic-Hydrothermal Transition, Recorded by Unidirectional Solidification Textures at Saginaw Hill, Arizona, USA
Fluid exsolution and melt evolution at the magmatic-hydrothermal transition are critical processes driving the metal enrichment of porphyry systems. Coeval fluid and melt inclusion assemblages in unidirectional solidification textures (USTs) at Saginaw Hillâa small, porphyry Cu system in southwestern Arizonaârecord a dynamic and repetitious process of fluid accumulation and release. The cores of quartz crystals throughout the UST bands host coeval silicate melt and brine inclusions but lack vapor-rich inclusions. This could indicate preferential expulsion of vapor and trapping of high-density brine during episodes of fracturing or the direct exsolution of single-phase high-salinity brine from the silicate melt. In contrast, the rims of UST quartz host abundant coeval brine and vapor inclusions, consistent with liquid-vapor immiscibility at lower pressures compared to the corresponding quartz cores. This transition from dominantly coeval silicate melt inclusions and brine in phenocryst cores to coeval brine and vapor in the rims suggests that the Saginaw Hill system underwent cyclic processes of fluid exsolution, accumulation, overpressure, and decompression at relatively stable temperatures (consistently ~650°C) during UST formation. Melt inclusion data indicate that the melt at this stage was highly fractionated and tended toward muscovite saturation. Metal concentrations in the brine were comparable to or higher than those in fluids reported in world-class porphyry Cu systems and were likely the result of both igneous fractionation and the high chloride content of the exsolved fluids. While limited in scale, Saginaw Hill provides evidence for processes that are predicted to occur at the magmatic-hydrothermal transition during the formation of large, well-mineralized porphyry systems
Influence of vegetation on the nocturnal foraging behaviors and vertebrate prey capture by endangered Burrowing Owls
Restrictions in technology have limited past habitat selection studies for many species to the home-range level, as a finer-scale understanding was often not possible. Consequently, these studies may not identify the true mechanism driving habitat selection patterns, which may influence how such results are applied in conservation. We used GPS dataloggers with digital video recorders to identify foraging modes and locations in which endangered Burrowing Owls (Athene cunicularia) captured prey. We measured the coarse and fine-scale characteristics of vegetation at locations in which owls searched for, versus where they caught, vertebrate prey. Most prey items were caught using hover-hunting. Burrowing Owls searched for, and caught, vertebrate prey in all cover types, but were more likely to kill prey in areas with sparse and less dense vegetative cover. Management strategies designed to increase Burrowing Owl foraging success in the Canadian prairies should try to ensure a mosaic of vegetation heights across cover types
The Role of Kisspeptin in the Ovarian Cycle, Pregnancy, and Fertility
Kisspeptins are a group of neuropeptides with regulatory functions related to puberty, fertility, and reproduction. They are primarily produced by hypothalamic nuclei and are thought to regulate the activity of neurons that produce gonadotropin-releasing hormone. They are also expressed by placental syncytiotrophoblasts in developing pregnancies and are likely involved in the processes of trophoblast invasion and placentation. Similarly to beta-hCG, kisspeptins are found in maternal plasma during the first trimester of pregnancy and increase proportionately with gestational age. Because of their role in implantation, there is currently interest in the use of kisspeptins as minimally invasive biomarkers. It is suspected that maternal kisspeptin levels have diagnostic potential in identifying viable early pregnancies
Graduate Woodwind Quintet Recital
Program listing performers and works performe
Collectivity of 0\u3csup\u3e+\u3c/sup\u3e States in \u3csup\u3e160\u3c/sup\u3eGd
Excited 0+ states in 160Gd have been examined with the (n,nâČÎł) reaction at incident neutron energies up to 2.8 MeV. Gamma-ray excitation functions and angular distribution measurements allow the confirmation of the existence of 0+ states at 1379.70 keV and 1558.30 keV, but we reject the assignments of additional previously suggested 0+ candidates. Limits on the level lifetimes of the observed 0+ states permit an evaluation of the collectivity of these states
Orbital decay in an accreting and eclipsing 13.7 minute orbital period binary with a luminous donor
We report the discovery of ZTF J0127+5258, a compact mass-transferring binary
with an orbital period of 13.7 minutes. The system contains a white dwarf
accretor, which likely originated as a post-common envelope carbon-oxygen (CO)
white dwarf, and a warm donor ().
The donor probably formed during a common envelope phase between the CO white
dwarf and an evolving giant which left behind a helium star or helium white
dwarf in a close orbit with the CO white dwarf. We measure gravitational
wave-driven orbital inspiral with significance, which yields a
joint constraint on the component masses and mass transfer rate. While the
accretion disk in the system is dominated by ionized helium emission, the donor
exhibits a mixture of hydrogen and helium absorption lines. Phase-resolved
spectroscopy yields a donor radial-velocity semi-amplitude of , and high-speed photometry reveals that the system is eclipsing.
We detect a {\it Chandra} X-ray counterpart with . Depending on the mass-transfer rate, the system will
likely evolve into either a stably mass-transferring helium CV, merge to become
an R Crb star, or explode as a Type Ia supernova in the next million years. We
predict that the Laser Space Interferometer Antenna (LISA) will detect the
source with a signal-to-noise ratio of after 4 years of observations.
The system is the first \emph{LISA}-loud mass-transferring binary with an
intrinsically luminous donor, a class of sources that provide the opportunity
to leverage the synergy between optical and infrared time domain surveys, X-ray
facilities, and gravitational-wave observatories to probe general relativity,
accretion physics, and binary evolution.Comment: 13 pages, 7 figures, 2 tables, submitted to ApJ
LSST: from Science Drivers to Reference Design and Anticipated Data Products
(Abridged) We describe here the most ambitious survey currently planned in
the optical, the Large Synoptic Survey Telescope (LSST). A vast array of
science will be enabled by a single wide-deep-fast sky survey, and LSST will
have unique survey capability in the faint time domain. The LSST design is
driven by four main science themes: probing dark energy and dark matter, taking
an inventory of the Solar System, exploring the transient optical sky, and
mapping the Milky Way. LSST will be a wide-field ground-based system sited at
Cerro Pach\'{o}n in northern Chile. The telescope will have an 8.4 m (6.5 m
effective) primary mirror, a 9.6 deg field of view, and a 3.2 Gigapixel
camera. The standard observing sequence will consist of pairs of 15-second
exposures in a given field, with two such visits in each pointing in a given
night. With these repeats, the LSST system is capable of imaging about 10,000
square degrees of sky in a single filter in three nights. The typical 5
point-source depth in a single visit in will be (AB). The
project is in the construction phase and will begin regular survey operations
by 2022. The survey area will be contained within 30,000 deg with
, and will be imaged multiple times in six bands, ,
covering the wavelength range 320--1050 nm. About 90\% of the observing time
will be devoted to a deep-wide-fast survey mode which will uniformly observe a
18,000 deg region about 800 times (summed over all six bands) during the
anticipated 10 years of operations, and yield a coadded map to . The
remaining 10\% of the observing time will be allocated to projects such as a
Very Deep and Fast time domain survey. The goal is to make LSST data products,
including a relational database of about 32 trillion observations of 40 billion
objects, available to the public and scientists around the world.Comment: 57 pages, 32 color figures, version with high-resolution figures
available from https://www.lsst.org/overvie
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