4,230 research outputs found
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Use of Psychosocial Support Services Among Male Veterans Affairs Colorectal Cancer Patients
The authors describe use of psychosocial services within +/− 3 months of diagnosis among male colorectal cancer (CRC) patients treated within the Veterans Affairs (VA) health care system. Analysis included 1,199 patients with CRC treated at 27 VA medical centers primarily diagnosed between the periods 2005 to 2007. Of the patients, 78.6% received some form of psychosocial support, including 50.5% social work, 58.9% chaplain, 6.2% psychologist, 7.1% psychiatry, 3.5% mental health nurse, and 4.4% other. Logistic regression results indicate that rectal cancer patients were less likely to receive psychosocial services (odds ratio = .65, 95% confidence interval [0.43, 0.97]). The majority of patients in the VA receive some type of psychosocial service at the time of CRC diagnosis
The Imprint of Gravitational Waves on the Cosmic Microwave Background
Long-wavelength gravitational waves can induce significant temperature
anisotropy in the cosmic microwave background. Distinguishing this from
anisotropy induced by energy density fluctuations is critical for testing
inflationary cosmology and theories of large-scale structure formation. We
describe full radiative transport calculations of the two contributions and
show that they differ dramatically at angular scales below a few degrees. We
show how anisotropy experiments probing large- and small-angular scales can
combine to distinguish the imprint due to gravitational waves.Comment: 11 pages, Penn Preprint-UPR-
Surgical resident experience with common bile duct exploration and assessment of performance and autonomy with formative feedback
Background
Common bile duct exploration (CBDE) is safe and effective for managing choledocholithiasis, but most US general surgeons have limited experience with CBDE and are uncomfortable performing this procedure in practice. Surgical trainee exposure to CBDE is limited, and their learning curve for achieving autonomous, practice-ready performance has not been previously described. This study tests the hypothesis that receipt of one or more prior CBDE operative performance assessments, combined with formative feedback, is associated with greater resident operative performance and autonomy.
Methods
Resident and attending assessments of resident operative performance and autonomy were obtained for 189 laparoscopic or open CBDEs performed at 28 institutions. Performance and autonomy were graded along validated ordinal scales. Cases in which the resident had one or more prior CBDE case evaluations (n = 48) were compared with cases in which the resident had no prior evaluations (n = 141).
Results
Compared with cases in which the resident had no prior CBDE case evaluations, cases with a prior evaluation had greater proportions of practice-ready or exceptional performance ratings according to both residents (27% vs. 11%, p = .009) and attendings (58% vs. 19%, p < .001) and had greater proportions of passive help or supervision only autonomy ratings according to both residents (17% vs. 4%, p = .009) and attendings (69% vs. 32%, p < .01).
Conclusions
Residents with at least one prior CBDE evaluation and formative feedback demonstrated better operative performance and received greater autonomy than residents without prior evaluations, underscoring the propensity of feedback to help residents achieve autonomous, practice-ready performance for rare operations
Mass dependence of light nucleus production in ultrarelativistic heavy ion collisions
Light nuclei can be produced in the central reaction zone via coalescence in
relativistic heavy ion collisions. E864 at BNL has measured the production of
ten light nuclei with nuclear number of A=1 to A=7 at rapidity and
. Data were taken with a Au beam of momentum of 11.5 A
on a Pb or Pt target with different experimental settings. The
invariant yields show a striking exponential dependence on nuclear number with
a penalty factor of about 50 per additional nucleon. Detailed analysis reveals
that the production may depend on the spin factor of the nucleus and the
nuclear binding energy as well.Comment: (6 pages, 3 figures), some changes on text, references and figures'
lettering. To be published in PRL (13Dec1999
Functional Genomic and Proteomic Analysis Reveals Disruption of Myelin-Related Genes and Translation in a Mouse Model of Early Life Neglect
Early life neglect is an important public health problem which can lead to lasting psychological dysfunction. Good animal models are necessary to understand the mechanisms responsible for the behavioral and anatomical pathology that results. We recently described a novel model of early life neglect, maternal separation with early weaning (MSEW), that produces behavioral changes in the mouse that persist into adulthood. To begin to understand the mechanism by which MSEW leads to these changes we applied cDNA microarray, next-generation RNA-sequencing (RNA-seq), label-free proteomics, multiple reaction monitoring (MRM) proteomics, and methylation analysis to tissue samples obtained from medial prefrontal cortex to determine the molecular changes induced by MSEW that persist into adulthood. The results show that MSEW leads to dysregulation of markers of mature oligodendrocytes and genes involved in protein translation and other categories, an apparent downward biasing of translation, and methylation changes in the promoter regions of selected dysregulated genes. These findings are likely to prove useful in understanding the mechanism by which early life neglect affects brain structure, cognition, and behavior
A New Era in the Quest for Dark Matter
There is a growing sense of `crisis' in the dark matter community, due to the
absence of evidence for the most popular candidates such as weakly interacting
massive particles, axions, and sterile neutrinos, despite the enormous effort
that has gone into searching for these particles. Here, we discuss what we have
learned about the nature of dark matter from past experiments, and the
implications for planned dark matter searches in the next decade. We argue that
diversifying the experimental effort, incorporating astronomical surveys and
gravitational wave observations, is our best hope to make progress on the dark
matter problem.Comment: Published in Nature, online on 04 Oct 2018. 13 pages, 1 figur
Measurements of Light Nuclei Production in 11.5 A GeV/c Au+Pb Heavy-Ion Collisions
We report on measurements by the E864 experiment at the BNL-AGS of the yields
of light nuclei in collisions of Au(197) with beam momentum of 11.5 A GeV/c on
targets of Pb(208) and Pt(197). The yields are reported for nuclei with baryon
number A=1 up to A=7, and typically cover a rapidity range from y(cm) to
y(cm)+1 and a transverse momentum range of approximately 0.1 < p(T)/A < 0.5
GeV/c. We calculate coalescence scale factors B(A) from which we extract model
dependent source dimensions and collective flow velocities. We also examine the
dependences of the yields on baryon number, spin, and isospin of the produced
nuclei.Comment: 21 figures-to be published in Phys. Rev.
Combinations of Metarhizium anisopliae with chemical insecticides and their effectiveness in Mahanarva fimbriolata (Hemiptera: Cercopidae) control on sugarcane
Some insecticides can be used jointly with entomopathogenic fungi, and therefore the combi-
nation of chemical and biological control measures can be a safe and effective method to con-
trol insect pests. The aim of this study was to evaluate the costs and efficacy of combinations of
Metarhizium anisopliae (Metschnikoff) Sorokin (Hypocreales: Clavicipitaceae) with thiameth-
oxam and imidacloprid on spittlebug (Mahanarva fimbriolata (Stål); Hemiptera: Cercopidae)
control on sugarcane. The experiment was conducted as a randomized block design (RBD)
with 10 treatments and 4 replications. The treatments included a control (untreated), thia-
−1
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12
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methoxam (250 g ha ), imidacloprid (700 g ha ), M. anisopliae (M. a.) (3 × 10 conidia ha ),
A1 (3 × 10 12 M. a. conidia ha −1 + 65 g ha −1 of thiamethoxam), A2 (3 × 10 12 M. a. conidia ha −1 + 125
g ha −1 of thiamethoxam), A3 (3 × 10 12 M. a. conidia ha −1 + 187.5 g ha −1 of thiamethoxam), A4 (3 ×
10 12 M. a. conidia ha −1 + 175 g ha −1 of imidacloprid), A5 (3 × 10 12 M. a. conidia ha −1 + 350 g ha −1 of
imidacloprid), and A6 (3 × 10 12 M. a. conidia ha −1 + 525g ha −1 of imidacloprid). The reductions
in the numbers of M. fimbriolata nymphs per treatment compared to the control were similar
at 15 DAT (days after treatment) in all treatments except combination A5 (M. anisopliae
and thiamethoxam). At 30 DAT, the numbers of nymphs were significantly reduced in all
treatments except A3, and their effectiveness ranged from 14.28% to 92.85%. At 45 DAT the
numbers of M. fimbriolata nymphs per treatment were significantly reduced in the following
treatments: imidacloprid alone at 700g ha -1 , A1, A2, A3, A4 and A6; and the combinations A1
and A2 caused the lowest M. fimbriolata nymph infestations and effectiveness rates of 77.41
and 87.09 %, respectively. At 75 DAT the 2 best control efficacies occurred in treatments A1 (3
× 10 12 M. a. conidia ha -1 of + 65g ha -1 of thiamethoxam) (82.1%) and A5 (78.6%) (3 × 10 12 M. a.
conidia ha −1 + 350 g ha −1 of imidacloprid). At 90 DAT the number of nymphs in the control had
increased 2.8 fold over the number at 75 DAT. Very good control efficacies at 90 DAT occurred
in all treatments with the combination of the fungus with an insecticide. At 105 DAT the
numbers of nymphs had surged in all treatments, and no treatment provided effective control.
The treatments with the highest earnings per hectare were A1 (3 × 10 12 M. a. conidia ha -1 + 65
g thiamethoxam) and M. anisopliae alone at the recommended dose of 3 × 10 12 M. a. conidia
ha -1 . Our findings demonstrate the effectiveness of using either thiamethoxam or imidacloprid
in combination with M. anisopliae to control M. fimbriolata nymphs on sugarcane, but greater
net earnings per hectare occurred with the lowest rate of the thiamethoxam combination than
with any of the imidacloprid combinations.Algunos insecticidas se puede utilizar con hongos entomopatógenos y por lo tanto, la aso-
ciación de los controles químico y biológico puede ser una estrategia segura y eficaz para
el control de insectos-plaga. El objetivo de este estudio fue evaluar los costos y eficacia de combinaciones de Metarhizium anisopliae (Metschnikoff) Sorokin (Hypocreales: Clavi-
cipitaceae) con insecticidas thiamethoxam e imidacloprid para el control de la chicharrita
(Mahanarva fimbriolata (Stål); Hemiptera: Cercopidae) en caña de azúcar . El experimento
fue conducido en un delineamiento en bloques casualizados (DBC), con 10 tratamientos y
4 repeticiones. Los tratamientos que incluidos el control (sin tratamiento), thiamethoxam
(250 g ha −1 ), imidacloprido (700 g ha −1 ), M. anisopliae (M.a.) (3×10 12 conidios ha −1 ), A1 (3×10 12
conidios ha −1 de M. a. + 65 g ha −1 de thiamethoxam), A2 (3×10 12 conidios ha −1 de M. a. + 125g
ha −1 de thiamethoxam), A3 (3×10 12 conidios ha −1 de M. a. + 187.5 g ha −1 de thiamethoxam), A4
(3×10 12 conidios ha −1 de M.a + 175 g ha −1 de imidacloprido), A5 (3×10 12 conidios ha −1 de M. a. +
350 g ha −1 de imidacloprido) y A6 (3×10 12 conidios ha −1 de M. a. + 525g ha −1 de imidacloprido).
Las reducciones en el número de ninfas M. fimbriolata por tratamiento en comparación con
el control fueron similares a los 15 DAT (días pos tratamiento) en todos los tratamientos
excepto A5 combinación (M. anisopliae y thiamethoxam). A los 30 DAT, el número de ninfas
se redujeron significativamente en todos los tratamientos, excepto A3, y su eficacia varió de
14,28% para 92,85%. A los 45 DAT, los números de ninfas M. fimbriolata por tratamiento se
redujeron significativamente en los siguientes tratamientos: imidacloprido solo en 700 g ha -1 ,
A1, A2, A3, A4 y A6; y las combinaciones de A1 y A2 causaron la más bajo infestaciones de
ninfas M. fimbriolata y sus tasas de eficacia fueron de 77,41 y 87,09%, respectivamente. A los
75 DAT, los 2 mejores eficacias de control se produjeron en tratamientos A1 (3×10 12 conidios
ha −1 de M. a. + 65 g ha −1 de thiamethoxam) y A5 (78.6%) (3×10 12 conidios ha −1 de M. a.+ 350
g ha −1 de imidacloprido). A los 90 DAT, el número de ninfas en el control había aumentado
2,8 veces más el número a 75 DAT. Muy buenas eficacias de control en 90 DAT, se produjo
en todos los tratamientos con la combinación del hongo con un insecticida. A los 105 DAT, el
número de ninfas habían aumentado en todos los tratamientos, y ningún tratamiento había
proporcionado un control efectivo. Los tratamientos con los mayores rendimientos hectárea
fueron A1 (3×10 12 conidios ha −1 de M. a.+ 65 g de thiamethoxam) y M. anisopliae solo a la dosis
recomendada de 3×10 12 conidios ha −1 de M. a. Nuestros resultados demuestran la eficacia de
thiamethoxam y imidacloprido en combinación con M. anisopliae para el control de ninfas M.
fimbriolata en caña de azúcar, pero mayores beneficio neto por hectárea se produjeron con la
tasa más baja de la combinación de thiamethoxam que con cualquiera de las combinaciones
de imidacloprid
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