561 research outputs found
More Than Words: Using Photovoice in Multi-Disciplinary Settings to Illustrate Client and Student Experiences
Author Abstract:
Photovoice is a participatory action research strategy that places the lens in the hands of the participant. Participants submit photos with accompanying narratives that illustrate their personal experiences regarding the assigned topic. This strategy can be used in individual, group, family, classroom, and youth group settings, with any age, or in qualitative research studies, to help participants share perspectives that are sometimes difficult to verbalize, and assist in creating change based on perceived experiences. Presenters will introduce photovoice, offer examples of implementation, and give attenders opportunities to practice assessing photovoice submissions
Snapshots from the Fringe: Utilizing Photovoice to Discover Commuter Experiences at ONU
Abstract
Commuter students can make up about 75% of the student population on university campuses, but researchers have shown that retention is a great challenge among this population. This qualitative research study utilized photovoice to discover the experiences of the commuter population at ONU. Photovoice is a strategy used in participatory action research. Participants submitted photos that reflected their own lived experiences as a commuter student from their perspectives. These photographs, accompanying narratives, and a follow-up focus group led to the discovery of themes and proposed action plans that might improve their experiences. This workshop describes Photovoice and the results of this study
Identifying Factors that Predict Policy Practice Among Social Workers
The social work profession has long touted a dual focus on service within micro and macro realms of practice, preparing social workers to serve marginalized populations at the boundary between the powerful and the powerless. Research, however, has shown that macro social work, or policy practice, has diminished. Current research has been inconsistent in identifying predictive factors of increased policy practice. With recent efforts by the profession to bolster waning policy practice among social workers, it is vital to identify factors that predict higher engagement. Theoretical frameworks suggest that professional socialization in policy practice as a group norm, having resources to participate in policy practice, being psychologically engaged in politics, and engaging in recruitment networks tends to increase policy practice. Based on these frameworks, professional socialization, policy practice preparedness, type of employment, and social media use were considered as potential predictive factors of engagement. The purpose of this study was to analyze these factors that may predict policy practice among social workers. Survey research was used to gather data from practicing social workers in Illinois (N = 93). A hierarchical multiple regression analysis empirically validated that higher levels of perceived professional socialization and policy practice preparedness both predicted higher levels of policy practice. Additionally, social workers who reported primary roles as administrative were more likely to engage in policy practice than direct practitioners. The results point to a need for the social work profession to bolster knowledge and skills in policy practice, reinforce professional identification in policy practice, and mobilize leaders to recruit and mentor direct practitioners
Observation of coherent transients in ultrashort chirped excitation of an undamped two-level system
The effects of Coherent excitation of a two level system with a linearly
chirped pulse are studied theoretically and experimentally (in Rb (5s - 5p)) in
the low field regime. The Coherent Transients are measured directly on the
excited state population on an ultrashort time scale. A sharp step corresponds
to the passage through resonance. It is followed by oscillations resulting from
interferences between off-resonant and resonant contributions. We finally show
the equivalence between this experiment and Fresnel diffraction by a sharp
edge.Comment: 4 pages, 4 figures, to appear in PR
Nucleoplasmic LAP2 alpha-lamin A complexes are required to maintain a proliferative state in human fibroblasts
In human diploid fibroblasts (HDFs), expression of lamina-associated polypeptide 2 (LAP2) upon entry and exit from G0 is tightly correlated with phosphorylation and subnuclear localization of retinoblastoma protein (Rb). Phosphoisoforms of Rb and LAP2 are down-regulated in G0. Although RbS780 phosphoform and LAP2 are up-regulated upon reentry into G1 and colocalize in the nucleoplasm, RbS795 migrates between nucleoplasmic and speckle compartments. In HDFs, which are null for lamins A/C, LAP2 is mislocalized within nuclear aggregates, and this is correlated with cell cycle arrest and accumulation of Rb within speckles. Nuclear retention of nucleoplasmic Rb during G1 phase but not of speckle-associated Rb depends on lamin A/C. siRNA knock down of LAP2 or lamin A/C in HDFs leads to accumulation of Rb in speckles and G1 arrest, probably because of activation of a cell cycle checkpoint. Our results suggest that LAP2 and lamin A/C are involved in controlling Rb localization and phosphorylation, and a lack or mislocalization of either protein leads to cell cycle arrest in HDFs
Long-Term Evolution and Revival Structure of Rydberg Wave Packets for Hydrogen and Alkali-Metal Atoms
This paper begins with an examination of the revival structure and long-term
evolution of Rydberg wave packets for hydrogen. We show that after the initial
cycle of collapse and fractional/full revivals, which occurs on the time scale
, a new sequence of revivals begins. We find that the structure of
the new revivals is different from that of the fractional revivals. The new
revivals are characterized by periodicities in the motion of the wave packet
with periods that are fractions of the revival time scale . These
long-term periodicities result in the autocorrelation function at times greater
than having a self-similar resemblance to its structure for times
less than . The new sequence of revivals culminates with the
formation of a single wave packet that more closely resembles the initial wave
packet than does the full revival at time , i.e., a superrevival
forms. Explicit examples of the superrevival structure for both circular and
radial wave packets are given. We then study wave packets in alkali-metal
atoms, which are typically used in experiments. The behavior of these packets
is affected by the presence of quantum defects that modify the hydrogenic
revival time scales and periodicities. Their behavior can be treated
analytically using supersymmetry-based quantum-defect theory. We illustrate our
results for alkali-metal atoms with explicit examples of the revival structure
for radial wave packets in rubidium.Comment: To appear in Physical Review A, vol. 51, June 199
Edge-Magnetoplasmon Wave-Packet Revivals in the Quantum Hall Effect
The quantum Hall effect is necessarily accompanied by low-energy excitations
localized at the edge of a two-dimensional electron system. For the case of
electrons interacting via the long-range Coulomb interaction, these excitations
are edge magnetoplasmons. We address the time evolution of localized
edge-magnetoplasmon wave packets. On short times the wave packets move along
the edge with classical E cross B drift. We show that on longer times the wave
packets can have properties similar to those of the Rydberg wave packets that
are produced in atoms using short-pulsed lasers. In particular, we show that
edge-magnetoplasmon wave packets can exhibit periodic revivals in which a
dispersed wave packet reassembles into a localized one. We propose the study of
edge-magnetoplasmon wave packets as a tool to investigate dynamical properties
of integer and fractional quantum-Hall edges. Various scenarios are discussed
for preparing the initial wave packet and for detecting it at a later time. We
comment on the importance of magnetoplasmon-phonon coupling and on quantum and
thermal fluctuations.Comment: 18 pages, RevTex, 7 figures and 2 tables included, Fig. 5 was
originally 3Mbyte and had to be bitmapped for submission to archive; in the
process it acquired distracting artifacts, to upload the better version, see
http://physics.indiana.edu/~uli/publ/projects.htm
Nuclear rupture at sites of high curvature compromises retention of DNA repair factors.
The nucleus is physically linked to the cytoskeleton, adhesions, and extracellular matrix-all of which sustain forces, but their relationships to DNA damage are obscure. We show that nuclear rupture with cytoplasmic mislocalization of multiple DNA repair factors correlates with high nuclear curvature imposed by an external probe or by cell attachment to either aligned collagen fibers or stiff matrix. Mislocalization is greatly enhanced by lamin A depletion, requires hours for nuclear reentry, and correlates with an increase in pan-nucleoplasmic foci of the DNA damage marker γH2AX. Excess DNA damage is rescued in ruptured nuclei by cooverexpression of multiple DNA repair factors as well as by soft matrix or inhibition of actomyosin tension. Increased contractility has the opposite effect, and stiff tumors with low lamin A indeed exhibit increased nuclear curvature, more frequent nuclear rupture, and excess DNA damage. Additional stresses likely play a role, but the data suggest high curvature promotes nuclear rupture, which compromises retention of DNA repair factors and favors sustained damage
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