191 research outputs found
CalYOUTH Survey of Young Adults' Child Welfare Workers
This report presents the results of the CalYOUTH Survey of Young Adults' Child Welfare Workers, a survey of case workers supervising youth in extended foster care who are participating in the CalYOUTH Youth Survey. The report shares the county child welfare workers' views on how these young people are faring with the transition to adulthood, as well as their preparedness and service needs in a wide range of areas. The report also shares workers' perceptions of the availability and helpfulness of services within their county, their perceptions of court personnel's supportiveness of extended care, their satisfaction with collaboration with other systems of potential support for youth, and their views of challenges to effective implementation of extended foster care in California. The survey results highlight areas of progress and opportunities for continued improvement as California continues its development of foster care for young adults
Findings from the California Youth Transitions to Adulthood Study (CalYOUTH): Conditions of Youth at Age 19
The "CalYOUTH Wave 2 Youth Survey", conducted when the young people participating in CalYOUTH were 19 years old, follows up on a survey of the same young people when they were approaching the age of majority in California's foster care system. More than 80 percent of the youth who took part in the baseline interviews participated in the Wave 2 survey. The report provides the most comprehensive view to date of young adults making the transition to adulthood from foster care in California, highlighting differences between young people participating in extended foster care and young people who had left care. The report provides feedback for all parties interested in improving youth's transitions from foster care to adulthood
Atm-Dependent Chk2 Activation Induced By Anticancer Agent, Irofulven
Irofulven (6-hydroxymethylacylfulvene, HMAF, MGI 114) is one of a new class of anticancer agents that are semisynthetic derivatives of the mushroom toxin illudin S. Preclinical studies and..
Parity Violation in Elastic Electron-Proton Scattering and the Proton's Strange Magnetic Form Factor
We report a new measurement of the parity-violating asymmetry in elastic electron scattering from the proton at backward scattering angles. This asymmetry is sensitive to the strange magnetic form factor of the proton as well as electroweak axial radiative corrections. The new measurement of A = -4.92±0.61±0.73 ppm provides a significant constraint on these quantities. The implications for the strange magnetic form factor are discussed in the context of theoretical estimates for the axial corrections
Parity Violation in Elastic Electron-Proton Scattering and the Proton's Strange Magnetic Form Factor
We report a new measurement of the parity-violating asymmetry in elastic
electron scattering from the proton at backward scattering angles. This
asymmetry is sensitive to the strange magnetic form factor of the proton as
well as electroweak axial radiative corrections. The new measurement of A=-4.92
+- 0.61 +- 0.73 ppm provides a significant constraint on these quantities. The
implications for the strange magnetic form factor are discussed in the context
of theoretical estimates for the axial corrections.Comment: 4 pages, 3 figures, submitted to Physical Review Letters, Sept 199
Impact of 90Y PET gradient-based tumor segmentation on voxel-level dosimetry in liver radioembolization
Abstract
Background
The purpose was to validate 90Y PET gradient-based tumor segmentation in phantoms and to evaluate the impact of the segmentation method on reported tumor absorbed dose (AD) and biological effective dose (BED) in 90Y microsphere radioembolization (RE) patients. A semi-automated gradient-based method was applied to phantoms and patient tumors on the 90Y PET with the initial bounding volume for gradient detection determined from a registered diagnostic CT or MR; this PET-based segmentation (PS) was compared with radiologist-defined morphologic segmentation (MS) on CT or MRI. AD and BED volume histogram metrics (D90, D70, mean) were calculated using both segmentations and concordance/correlations were investigated. Spatial concordance was assessed using Dice similarity coefficient (DSC) and mean distance to agreement (MDA). PS was repeated to assess intra-observer variability.
Results
In phantoms, PS demonstrated high accuracy in lesion volumes (within 15%), AD metrics (within 11%), high spatial concordance relative to morphologic segmentation (DSC > 0.86 and MDA  0.99, MDA < 0.2 mm, AD/BED metrics within 2%). For patients (58 lesions), spatial concordance between PS and MS was degraded compared to in-phantom (average DSC = 0.54, average MDA = 4.8 mm); the average mean tumor AD was 226 ± 153 and 197 ± 138 Gy, respectively for PS and MS. For patient AD metrics, the best Pearson correlation (r) and concordance correlation coefficient (ccc) between segmentation methods was found for mean AD (r = 0.94, ccc = 0.92), but worsened as the metric approached the minimum dose (for D90, r = 0.77, ccc = 0.69); BED metrics exhibited a similar trend. Patient PS showed low intra-observer variability (average DSC = 0.81, average MDA = 2.2 mm, average AD/BED metrics within 3.0%).
Conclusions
90Y PET gradient-based segmentation led to accurate/robust results in phantoms, and showed high concordance with MS for reporting mean tumor AD/BED in patients. However, tumor coverage metrics such as D90 exhibited worse concordance between segmentation methods, highlighting the need to standardize segmentation methods when reporting AD/BED metrics from post-therapy 90Y PET. Estimated differences in reported AD/BED metrics due to segmentation method will be useful for interpreting RE dosimetry results in the literature including tumor response data.https://deepblue.lib.umich.edu/bitstream/2027.42/146544/1/40658_2018_Article_230.pd
Measurement of the vector analyzing power in elastic electron-proton scattering as a probe of double photon exchange amplitudes
We report the first measurement of the vector analyzing power in inclusive
transversely polarized elastic electron-proton scattering at Q^2 = 0.1
(GeV/c)^2 and large scattering angles. This quantity should vanish in the
single virtual photon exchange, plane wave impulse approximation for this
reaction, and can therefore provide information on double photon exchange
amplitudes for electromagnetic interactions with hadronic systems. We find a
non-zero value of A=-15.4+/-5.4 ppm. No calculations of this observable for
nuclei other than spin 0 have been carried out in these kinematics, and the
calculation using the spin orbit interaction from a charged point nucleus of
spin 0 cannot describe these data.Comment: 4 pages, 2 figures, submitted to Phys. Rev. Let
Mutual-mothering as wise living or living wisely
Abstract: In the 1970s, feminist biblical scholars began to conduct research on the biblical traditions of wisdom and the manifestation of female images of God, named Sophialogy. There are different focus areas within Sophialogy, but the formulation of Wisdom/Sophia goals for liberation and equality was inter alia the focus area of feminist biblical interpretation. According to this approach, Jesus as the prophetic messenger of Wisdom/Sophia activates the Sophia tradition through his works or deeds of compassion for the poor, the outcasts, and all those suffering from injustice. Women in Africa interpret these deeds as communal ‘wise living’ and the custodians of justice. This culminates in a motherhood agenda, namely, making peace for life; ensuring mutual respect, honour and care for life; looking for fairness; reciprocity; wholeness and inclusiveness. The aim of this paper is to discuss mutual-mothering in the African context as an ethos for living wisely and justly. Having instincts to care and to protect are not exclusively female attributes, but include also males
Antibodies in HIV-1 Vaccine Development and Therapy
Despite 30 years of study, there is no HIV-1 vaccine and, until recently, there was little hope
for a protective immunization. Renewed optimism in this area of research comes in part from
the results of a recent vaccine trial and the use of single-cell antibody-cloning techniques that
uncovered naturally arising, broad and potent HIV-1–neutralizing antibodies (bNAbs). These
antibodies can protect against infection and suppress established HIV-1 infection in animal models.
The finding that these antibodies develop in a fraction of infected individuals supports the idea
that new approaches to vaccination might be developed by adapting the natural immune strategies
or by structure-based immunogen design. Moreover, the success of passive immunotherapy in
small-animal models suggests that bNAbs may become a valuable addition to the armamentarium
of drugs that work against HIV-1
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