3,595 research outputs found
Is J 133658.3-295105 a Radio Source at z >= 1.0 or at the Distance of M 83?
We present Gemini optical imaging and spectroscopy of the radio source J
133658.3-295105. This source has been suggested to be the core of an FR II
radio source with two detected lobes. J 133658.3-295105 and its lobes are
aligned with the optical nucleus of M 83 and with three other radio sources at
the M 83 bulge outer region. These radio sources are neither supernova remnants
nor H II regions. This curious configuration prompted us to try to determine
the distance to J 133658.3-295105. We detected H_alpha emission redshifted by ~
130 km s^-1 with respect to an M 83 H II region 2.5" east-southeast of the
radio source. We do not detect other redshifted emission lines of an optical
counterpart down to m_i = 22.2 +/- 0.8. Two different scenarios are proposed:
the radio source is at z >= 2.5, a much larger distance than the previously
proposed lower limit z >= 1.0, or the object was ejected by a gravitational
recoil event from the M 83 nucleus. This nucleus is undergoing a strong
dynamical evolution, judging from previous three-dimensional spectroscopy.Comment: 6 pages, 4 figure
Self-Actualization and Persistence in Selected Vocational Curricula for First-Time Entering Students at a Community College
Investigated personality factors associated with self-actualization among first time entering students at a predominately trade-technical community college. The Ss were 529 students enrolled in liberal arts and trade-technical programs. The Ss were administered the Personal Orientation Inventory (POI) and the results formed the basis of two analyses.
I. A 2x2x2 (eight cells) factorial analysis included length of attendance, vocational choice, and age, applied to each of the 12 POI scales. It was found that: (1) POI measures did not differentiate between persisters and drop-outs over a one semester period; (2) that liberal arts students received better POI scores than did technical vocational students on the scales of Inner-Directed Control, Existentiality, Self-Regard, Synergy, and Capacity for Intimate Contact; and (3) that older students received better scores than younger students on the Time Competence, Inner-Directed Control, Self-Actualizing Values, Synergy, and Self-Regard scales.
II. A lx8 analysis for each of the 12 POI scales indicated differences between the eight major ethnic groups represented in the study. The scales of Time Competence, Inner Directed Control, and Existentiality were significant at the .01 level, and the scales of Synergy, Self-Actualizing Values, Nature of Man, Self-Acceptance, and Capacity for Intimate Contact were significant at the . 05 level. A subsequent Newman-Keuls analysis revealed greatest differences between Filipinos. Chinese and Portuguese versus other groups studied. Caucasians received higher scores on all scales and Filipinos scored consistently low on all scales. A comparison of the Tc and I scales for the ethnic groups indicated a relationship between these scales and degree of acculturation
Infinite-randomness critical point in the two-dimensional disordered contact process
We study the nonequilibrium phase transition in the two-dimensional contact
process on a randomly diluted lattice by means of large-scale Monte-Carlo
simulations for times up to and system sizes up to
sites. Our data provide strong evidence for the transition being controlled by
an exotic infinite-randomness critical point with activated (exponential)
dynamical scaling. We calculate the critical exponents of the transition and
find them to be universal, i.e., independent of disorder strength. The
Griffiths region between the clean and the dirty critical points exhibits
power-law dynamical scaling with continuously varying exponents. We discuss the
generality of our findings and relate them to a broader theory of rare region
effects at phase transitions with quenched disorder. Our results are of
importance beyond absorbing state transitions because according to a
strong-disorder renormalization group analysis, our transition belongs to the
universality class of the two-dimensional random transverse-field Ising model.Comment: 13 pages, 12 eps figures, final version as publishe
Effects of Parental Incarceration: A Grandparent\u27s Perspective
This qualitative study explored grandparents’ perceptions of parental incarceration effects on the grandchildren they are raising. Children of incarcerated individuals are directly affected by the high incarceration rate in the United States and often find themselves displaced from the people and environment they know. As one of the most common caregivers for children with incarcerated parents, grandparents offer a unique perspective on the effects that parental incarceration has on children. The study found that grandparents perceive that the effects of parental incarceration on children are diverse. Children represented in the study were negatively affected emotionally and behaviorally by parental incarceration, displacement, and associated traumas, yet placement with a grandparent during periods of parental incarceration had positive effects on child outcomes. Grandparents indicated a need for external support, more of a voice, and a more efficient process for kinship care. To be most effective, social workers who encounter children and grandparents affected by parental incarceration should take time to carefully understand the unique effects of parental incarceration on the child, being careful not to assume that a child has been impacted by parental incarceration in any way
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