1,433 research outputs found

    Addition of Chloroamines to Ketenes

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    Considerable work has been done in this laboratory on the reactions of chlorine derivatives of nitrogen compounds, particularly nitrogen trichloride, monochloroamine, monobromoamine, dibromoamine, and the alkylchloroamines

    Criterios espaciales de dise帽o de un restaurante de estilo minimalista para la remodelaci贸n de casonas miraflorinas

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    El presente proyecto de investigaci贸n, responde a una problem谩tica que se evidencia a trav茅s de una serie de debilidades como la antig眉edad de edificaci贸n de las casonas ,las cuales se pueden encontrar en mal estado de conservaci贸n lo que significa un aumento en el costo de las remodelaciones ya que estas no solo se centrar铆an en transformar la vivienda a un restaurante sino en reparar y reforzar las estructuras que se encuentren en mal estado, la falta de planos y tambi茅n contribuye a elevar estos costos de remodelaci贸n

    The Ursinus Weekly, June 4, 1917

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    Wonderful concert by Music Society 鈥 Seniors entertained by alumni club 鈥 Baccalaureate theme brotherhood of man 鈥 Unveiling of portraits impressive ceremony 鈥 Senior programs in literary societies 鈥 Real Christian work for next year 鈥 Successful season for college quartet 鈥 Pupils\u27 recital 鈥 A letter from Fort Niagarahttps://digitalcommons.ursinus.edu/weekly/2596/thumbnail.jp

    Factors Associated With Ordering Laboratory Monitoring Of High-Risk Medications

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    Background Knowledge about factors associated with provider ordering of appropriate testing is limited. Objective To determine physician factors correlated with ordering of recommended laboratory monitoring tests for high-risk medications, accounting for patient characteristics. Methods Analysis of the administrative claims and electronic medical records of patients prescribed a high-risk medication requiring laboratory monitoring in a large multispecialty group practice between January 1, 2008 and December 31, 2008. The outcome is a physician order for each recommended laboratory test for each prescribed medication. Key predictor variables include physician characteristics, including age, gender, specialty training, years since completing training, and prescribing volume. We used multivariable logistic regression to identify the independent association of physician and patient characteristics with ordering of laboratory tests to monitor medications after adjustment for potential confounders, taking into account clustering of drugs within patients and patients within providers. Results Physician orders for laboratory testing varied across drug-test pairs and ranged from 9% (Primidone鈥揚henobarbital level) to 97% (Azathioprine鈥揅BC) with 50% of drug-test pairs in the 85-91% ordered range. Failure to order a test was associated with lower provider prescribing volume for study drugs and whether the physician was a specialist (primary care providers were more likely to order tests than specialists). Patients with lower patient comorbidity burden and younger patients were less likely to have appropriate tests ordered. Drug-test combinations with black box warnings were more likely to have tests ordered. Conclusions Interventions targeting providers should be addressed at those subgroups with the greatest potential for improvement: providers with lower frequencies of prescribing high-risk medications, and healthier and younger patients. Drug-test combinations with black box warnings have higher ordering rates, but many medications without such warnings also have evidence of harm, thus efforts to improve testing are necessary for all medications shown to be high-risk

    A Spectacular H\alpha Complex in Virgo: Evidence for a Collision Between M86 and NGC 4438 and Implications for Collisional ISM Heating of Ellipticals

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    Deep wide-field H\alpha+[NII] imaging around the Virgo cluster giant elliptical galaxy M86 reveals a highly complex and disturbed ISM/ICM. The most striking feature is a set of H\alpha filaments which clearly connect M86 with the nearby disturbed spiral NGC 4438 (23'=120 kpc projected away), providing strong evidence for a previously unrecognized collision between them. Spectroscopy of selected regions show a fairly smooth velocity gradient between M86 and NGC 4438, consistent with the collision scenario. Such a collision would impart significant energy into the ISM of M86, probably heating the gas and acting to prevent the gas from cooling to form stars. We propose that cool gas stripped from NGC 4438 during the collision and deposited in its wake is heated by shocks, ram pressure drag, or thermal conduction, producing most of the H\alpha filaments. Some H\alpha filaments are associated with the well-known ridge of bright X-ray emission to the NW of the nucleus, suggesting that the collision is responsible for peculiarities of M86 previously ascribed to other effects. M86 is radio-quiet, thus AGN heating is unlikely to play a significant role. The M86 system has implications for understanding the role of gravitational interactions in the heating of the ISM in ellipticals, and how collisions in clusters transform galaxies.Comment: 6 pages, 2 figures. For high-resolution images, see http://www.astro.yale.edu/tal/research/index.htm

    Simultaneous Ultraviolet and X-ray Observations of the Seyfert Galaxy NGC 4151. I. Physical Conditions in the X-ray Absorbers

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    We present a detailed analysis of the intrinsic X-ray absorption in the Seyfert 1 galaxy NGC 4151 using Chandra/HETGS data obtained 2002 May, as part of a program which included simultaneous UV spectra using HST/STIS and FUSE. NGC 4151 was in a relatively low flux state during the observations reported here, although roughly 2.5 times as bright in the 2 --10 keV band as during a Chandra observation in 2000. The soft X-ray band was dominated by emission lines, which show no discernible variation in flux between the two observations. The 2002 data show the presence of a very highly ionized absorber, in the form of H-like and He-like Mg, Si, and S lines, as well as lower ionization gas via the presence of inner-shell absorption lines from lower-ionization species of these elements. The former is too highly ionized to be radiatively accelerated in a sub-Eddington source such as NGC 4151. We find that the lower ionization gas had a column density a factor of ~ 3 higher during the 2000 observation. If due to bulk motion, we estimate that this component must have a velocity of more than 1250 km/sec transverse to our line-of-sight. We suggest that these results are consistent with a magneto-hydrodynamic flow.Comment: 42 pages, 14 figures. Accepted for publication in The Astrophysical Journa

    Plasma Plume Characterization of the HERMeS during a 1722-hr Wear Test Campaign

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    A 1722-hour wear test campaign of NASAs 12.5 kilowatt Hall Effect Rocket with Magnetic Shielding was completed. This wear test campaign, completed in 2016, was divided into four segments including an electrical configuration characterization test, two short duration tests, and one long wear test. During the electrical configuration characterization test, the plasma plume was examined to provide data to support the down select of the electrical configuration for further testing. During the long wear tests, the plasma plume was periodically examined for indications of changes in thruster behavior. Examination of the plasma plume data from the electrical configuration characterization test revealed a correlation between the plume properties and the presence of a conduction path through the front poles. Examination of the long wear test plasma plume data revealed that the plume characteristics remained unchanged during testing to within the measurement uncertainty
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