81 research outputs found
Deep WFPC2 and Ground-based Imaging of a Complete Sample of 3C Quasars and Galaxies
We present the results of an HST and ground-based imaging study of a complete
3C sample of z ~ 1 sources, including 5 quasars and 5 radio galaxies. We have
resolved continuum structure around all of our quasars in the WFPC2 images and
in four of the five ground-based K' images. All of the quasars have some
optical continuum structure that is aligned with the radio axis. In 3 of these
cases, some of this optical structure is most likely due to optical synchrotron
radiation, including optical counterparts to two radio jets and one radio lobe.
Two quasars have aligned continuum and emission-line structures that are
probably not due to beamed optical synchrotron emission. In another quasar, we
see a red aligned object that lies 3 arcsec beyond the radio lobe, and may be
an unassociated foreground galaxy, but has a remarkable morphological
resemblance to the radio lobe itself. The radio galaxies and the quasars in
this small sample have similar incidence of alignment, and the optical and K'
flux densities are consistent within the high dispersion. The average quasar
host galaxy luminosity is equivalent to, or a little fainter than, L*. All
components around the quasars have optical-infrared colors that are redder than
or similar to the colors of their respective nuclei; this is generally more
consistent with a stellar rather than scattered origin for the emission. This
study provides qualitative support for the unification of FRII quasars and
galaxies.Comment: 69 pages, LaTeX (aaspp4.sty); 10 tables (aj_pt4.sty); 22 figures;
accepted to A.J., August 199
Deep Spectroscopy in the Field of 3C 212
We present the results of longslit and multiaperture spectroscopy of faint
galaxies in the field of the z=1.049 quasar 3C212. We show that an apparently
aligned optical feature beyond the NW radio lobe has a redshift z=0.928, and a
similarly aligned feature just beyond the SE radio lobe has a redshift z=1.053,
quite close to that of the quasar. While the NW optical component is extremely
well aligned with the radio jet and has a morphology that is very similar to
that of the radio lobe lying 3" interior to it, the fact that we find three
other field galaxies with closely similar redshifts indicates that it is most
likely a member of an intervening group rather than an unusual example of true
alignment with the radio structure. In addition, we have found two galaxies
(besides the one near the SE radio lobe) having redshifts close to that of
3C212. We have firm or probable redshifts for 66 out of 82 galaxies we have
observed in this field. Comparison with the redshift distribution of faint
field galaxies indicates that a large fraction of the remaining 16 galaxies are
likely to be at redshifts >1.4. There are at least two low-redshift dwarf
starburst galaxies showing low metal abundance and high ionization in our
sample; such galaxies are likely to be relatively common in very faint samples,
and, under certain conditions, they could be confused with high-redshift
objects.Comment: 15 pages, 4 figures, one of which is a separate JPEG plate. To be
published in the April 1998 issue of The Astronomical Journa
Resilience among elementary educators as measured by the personal and organizational quality assessment-revised and the emotional quotient inventory: short
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file.Title from title screen of research.pdf file (viewed on August 8, 2007)Vita.Thesis (Ph. D.) University of Missouri-Columbia 2006.Purpose: The purpose of this study was to examine the effect of time on the indices within the Personal and Organizational Assessment-Revised (POQA-R, Institute of HeartMath, 1999-2004) among rural, elementary educators (N=26). This study also evaluated an overall emotional intelligence score using the Emotional Quotient inventory; Short form (EQi:S, BarOn, 2002). The time points were fall, spring, and summer over one academic year. Procedures: Two rural school districts were contacted and elected to participate in the study. POQA-R instruments were proctored three times over the academic year, fall, spring, and summer. During the spring the EQi:S was administered electronically. Findings: Frequency and descriptive statistics, one-way repeated measures ANOVA, and pairwise comparisons using Bonferroni correction were used to analyze data. All data were tested at the p<.05 level of significance. The null hypothesis that all time points would be similar on all indices was rejected for calmness and freedom of expression. These indices were significantly greater during the summer compared to the fall.Includes bibliographical reference
High-Resolution K' Imaging of the z = 1.786 Radio Galaxy 3C 294
We have obtained imaging in the K' band (~I-band rest frame) of the z=1.786
radio galaxy 3C 294 with the 36-element curvature-sensing adaptive optics
system Hokupa`a and the Canada-France-Hawaii Telescope. At a resolution of <
\~0."15, the galaxy is seen as a group of small but resolved knots distributed
over a roughly triangular region ~1."4 across. The interpretation of the
structure depends on the location of the nucleus, as indicated by the compact
radio core. Its position is uncertain by > ~0."5 (2-sigma) because of
uncertainties in the optical astrometry, but our best estimate places it at or
near the southern apex of the distribution. If this location is correct, the
most likely interpretation is that of a hidden quasar nucleus illuminating
dusty infalling dwarf-galaxy-like clumps having characteristic sizes of ~1.5
kpc.Comment: 8 pages. One figure in gif format. Postscript version including fig.
(240 kb) available at http://www.ifa.hawaii.edu/~canaguby/preprints.html To
appear in ApJ. Letter
Two Active Nuclei in 3C294
The z=1.786 radio galaxy 3C294 lies <10 arsec from a 12th mag star and has
been the target of at least three previous investigations using adaptive-optics
imaging. A major problem in interpreting these results is the uncertainty in
the precise alignment of the radio structure with the H or K-band AO imaging.
Here we report observations of the position of the AO guide star with the HST
Fine Guidance Sensor, which, together with positions from the U. S. Naval
Observatory's UCAC2 catalog, allow us to register the infrared and radio frames
to an accuracy of better than 0.1 arcsec. The result is that the nuclear
compact radio source is not coincident with the brightest discrete object in
the AO image, an essentially unresolved source on the eastern side of the light
distribution, as Quirrenbach et al. (2001) had suggested. Instead, the radio
source is centered about 0.9 arcsec to the west of this object, on one of the
two apparently real peaks in a region of diffuse emission. Nevertheless, the
conclusion of Quirrenbach et al. that 3C294 involves an ongoing merger appears
to be correct: analysis of a recent deep Chandra image of 3C294 obtained from
the archive shows that the nucleus comprises two X-ray sources, which are
coincident with the radio nucleus and the eastern stellar object. The
X-ray/optical flux ratio of the latter makes it extremely unlikely that it is a
foreground Galactic star.Comment: 16 pages, including 4 figures. To appear in ApJ, vol. 60
Tribute to Donald A. Winslow
This article is comprised of a series of tributes to Donald A. Winslow, who was a law professor at the University of Kentucky College of Law
2013-2014 Clemson LGBTQ Task Force Recommendations
In December of 2011, a group of faculty, staff, students, alumni, and other Clemson community members came together to discuss the invisibility of the queer and trans communities in the âClemson familyâ message. The event was held at the Madren Center and sponsored in part by the thenâDean of Students Joy Smith. One of the motivating factors of the meeting was Clemson Universityâs unfortunately low score, 2 out of 5 stars, on the National LGBTâFriendly Campus Climate Assessment tool from Campus Pride. The average score among the Topâ20 Public Schools (U.S. News & World Report, 2013) is 4.4 out of 5 stars. Of the Topâ25 Public Schools, only Clemson scored below a 3 out of 5 stars. Our main motivation stemmed from the controversial offâcampus beating of a gay Clemson student. Leading up to the confrontation gay slurs were used against two students and one student suffered a physical attack.
From the meetingâs exhaustive list of findings, three items were identified as priorities: establishment of a LGBTQ commission, establishment of a LGBTQ resource center, and sameâsex spousal benefits. Of the three, the establishment of a commission was pursued by Leon Wiles (Chief Diversity Officer), Susan Hilligoss (English faculty), and Joshua Morgan (library staff). Bylaws were drafted, and in November of 2012, a smaller representative group appeared before President Jim Barker to present their rationale for the establishment of a commission. The president responded by appointing a task force to act in an advisory capacity and to continue the discussion about how to make members of the queer and trans communities feel welcome and safe in the Clemson family
A touchdown nucleic acid amplification protocol as an alternative to culture backup for immunofluorescence in the routine diagnosis of acute viral respiratory tract infections
BACKGROUND: Immunofluorescence and virus culture are the main methods used to diagnose acute respiratory virus infections. Diagnosing these infections using nucleic acid amplification presents technical challenges, one of which is facilitating the different optimal annealing temperatures needed for each virus. To overcome this problem we developed a diagnostic molecular strip which combined a generic nested touchdown protocol with in-house primer master-mixes that could recognise 12 common respiratory viruses. RESULTS: Over an 18 month period a total of 222 specimens were tested by both immunofluorescence and the molecular strip. The specimens came from 103 males (median age 3.5 y), 80 females (median age 9 y) and 5 quality assurance scheme specimens. Viruses were recovered from a number of specimen types including broncho-alveolar lavage, nasopharyngeal secretions, sputa, post-mortem lung tissue and combined throat and nasal swabs. Viral detection by IF was poor in sputa and respiratory swabs. A total of 99 viruses were detected in the study from 79 patients and 4 quality control specimens: 31 by immunofluorescence and 99 using the molecular strip. The strip consistently out-performed immunofluorescence with no loss of diagnostic specificity. CONCLUSIONS: The touchdown protocol with pre-dispensed primer master-mixes was suitable for replacing virus culture for the diagnosis of respiratory viruses which were negative by immunofluorescence. Results by immunofluorescence were available after an average of 4â12 hours while molecular strip results were available within 24 hours, considerably faster than viral culture. The combined strip and touchdown protocol proved to be a convenient and reliable method of testing for multiple viruses in a routine setting
Children with Respiratory Disease Associated with Metapneumovirus in Hong Kong
Human metapneumovirus (HMPV) is a newly discovered pathogen thought to be associated with respiratory disease. We report the results of a study of 587 children hospitalized with respiratory infection over a 13-month period. HMPV was detected in the nasopharyngeal aspirates from 32 (5.5%) children by reverse transcription-polymerase chain reaction. HMPV infection was associated with clinical diagnoses of pneumonia (36%), asthma exacerbation (23%), or acute bronchiolitis (10%). When compared to those with respiratory syncytial virus infection, children with HMPV infection were older, and wheezing was more likely to represent asthma exacerbation rather than acute bronchiolitis. HMPV viral activity peaked during the spring-summer period in Hong Kong. Phylogenetically, all HMPV virus strains from Hong Kong belonged to one of the two genetic lineages previously described. HMPV contributed to 441.6 hospital admissions per 100,000 population <6 years of age
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