373 research outputs found
Biotech-Pharmaceutical Alliances as aSignal of Asset and Firm Quality*
We examine the determinants of biotech-pharmaceutical alliance prices to determine whether the market for alliances is characterized by asymmetric information. We find that inexperienced biotech companies receive substantially discounted payments when forming their first alliance. A jointly developed drug is more likely to advance in clinical trials than a drug developed by a single company, so the first- deal discount is not consistent with the drug’s subsequent performance. Biotech companies receive substantially higher valuations from venture capitalists and the public equity market after forming their first alliance, which implies that alliances send a positive signal to prospective investors
The Impact of Health Information Technology on Hospital Productivity
Health information technology (IT) has been championed as a tool that can transform health care delivery. We estimate the parameters of a value-added hospital production function correcting for endogenous input choices to assess the private returns hospitals earn from health IT. Despite high marginal products, the total benefits from expanded IT adoption are modest. Over the span of our data, health IT inputs increased by more than 210% and contributed about 6% to the increase in value-added. Not-for-profits invested more heavily and differently in IT. Finally, we find no compelling evidence of labor complementarities or network externalities from competitors’ IT investment
Local Health Department Collaborative Capacity to Improve Population Health
Local health departments (LHDs) can more effectively develop and strengthen community health partnerships when leaders focus on building partnership collaborative capacity (PCC), including a multisector infrastructure for population health improvement. Using the 2008 National Association of County and City Health Officials (NACCHO) Profile survey, we constructed an overall measure of LHD PCC comprised of the five dimensions: outcomes-based advocacy, vision-focus balance, systems orientation, infrastructure development, and community linkages. We conducted a series of regression analyses to examine the extent to which LHD characteristics and contextual factors were related to PCC. The most developed PCC dimension was vision-focus balance, while infrastructure development and community linkages were the least developed. In multivariate analyses, LHDs that were locally governed (rather than governed by the state), LHDs without local boards of health, and LHDs providing a wider range of clinical services had greater overall PCC. LHDs serving counties with higher uninsurance rates had lower overall PCC. LHDs with lower per capita expenditures had less developed partnership infrastructure. LHD discontinuation of clinical services may result in an erosion of collaborative capacity unless LHD partnerships also shift their foci from services delivery to population health improvement
The photochromic and photorefractive response of Czochralski grown Bi₁₂GeO₂₀ doped with chromium and manganese
Topical Tritiated Thymidine for Epidermal Growth Fraction Determination
Direct autoradiographic identification of the epidermal growth fraction (GF) requires the delivery of tritiated thymidine ([3H]dThd) to the skin during the time interval of an entire cell cycle. The GF in normal human epidermis has not been directly measured using this technique because the systemic infusion of radioactive [3H]dThd in benign skin conditions is precluded by ethical considerations. Studies were undertaken to assess the feasibility of measuring the epidermal GF in vivo by the topical delivery of [3H]dThd. The percutaneous penetration of [3dThd in various vehicles was evaluated to select an effective topical delivery system. A vehicle consisting of Azone, isopropanol, and water (2:49:49) was the best of 4 different vehicles tested. The optimal penetration of [3H]dThd, with respect to the concentration of Azone over a range of 0–4%, was achieved at 2%. During the initial 24h following a single topical application of [3H]dThd to hairless mice the labeling increased linearly with time. In vivo studies in hairless mice produced a GF of 95% by both continuous systemic [3H]dThd infusion, and by twice daily topical [3H]dThd. Azone vehicles induced epidermal hyperplasia which was minimized by lowering the Azone concentration and by decreasing the frequency of applications from 24 to 48h. These studies establish the rationale for using topical delivery of [3H]dThd for the in vivo measurement of epidermal GF
Four Strategies for Driving a University Pre-College Computing Outreach Program
A public university’s computing outreach program focused on four key strategies for increasing the depth and breadth of science, technology, engineering, and mathematics (STEM) education. This paper describes the development and implementation of a project management hands-on learning laboratory activity within the context of the university’s outreach strategies. The first two strategies, establishing relationships with the primary and secondary (K–12) level partner schools and implementing whole-grade participation, have led to repeat visits by students over several years. The third strategy, hands-on learning laboratory activities, has successfully engaged K–12 students, as indicated by the assessment results that provide evidence of successful student learning. The fourth strategy, producer–consumer collaborations, has facilitated the efficient matching of faculty expertise with K–12 teacher needs. The results include the evidence that outreach strategies can have a positive influence on student engagement in STEM education at multiple points in the K–12 education experience
Association of Center Volume with Outcome After Liver and Kidney Transplantation
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/73934/1/j.1600-6143.2004.00462.x.pd
The Design and Validation of the Quantum Mechanics Conceptual Survey
The Quantum Mechanics Conceptual Survey (QMCS) is a 12-question survey of
students' conceptual understanding of quantum mechanics. It is intended to be
used to measure the relative effectiveness of different instructional methods
in modern physics courses. In this paper we describe the design and validation
of the survey, a process that included observations of students, a review of
previous literature and textbooks and syllabi, faculty and student interviews,
and statistical analysis. We also discuss issues in the development of specific
questions, which may be useful both for instructors who wish to use the QMCS in
their classes and for researchers who wish to conduct further research of
student understanding of quantum mechanics. The QMCS has been most thoroughly
tested in, and is most appropriate for assessment of (as a posttest only),
sophomore-level modern physics courses. We also describe testing with students
in junior quantum courses and graduate quantum courses, from which we conclude
that the QMCS may be appropriate for assessing junior quantum courses, but is
not appropriate for assessing graduate courses. One surprising result of our
faculty interviews is a lack of faculty consensus on what topics should be
taught in modern physics, which has made designing a test that is valued by a
majority of physics faculty more difficult than expected.Comment: Submitted to Physical Review Special Topics: Physics Education
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A Review of the Reflector Compact Fluorescent Lights Technology Procurement Program: Conclusions and Results
This report describes a project sponsored by the U.S. Department of Energy (DOE) and implemented by the Pacific Northwest National Laboratory (PNNL), from 2000 to 2007 to improve the performance of reflector type (R-lamp) compact fluorescent lamps (CFLs) and increase their availability throughout the United States by means of a technology development and procurement strategy. In 2000, at the request of the U.S. Department of Energy’s Emerging Technologies Program and its predecessors, the Pacific Northwest National Laboratory undertook a technology procurement seeking R-CFLs that were specifically designed for use in ICAT recessed can fixtures and that met other minimum performance criteria including minimum light output and size restrictions (to ensure they fit in standard residential recessed cans). The technology procurement included two phases. In Phase I, requests for proposals (RFPs) were issued in October 2002 and five manufacturers responded with 12 lamp models. Eight of these models met the minimum requirements and passed the 6-hour short-term test in a simulated ICAT environment. These eight models were subjected to long-term tests of 6,000 or more hours in a simulated ICAT environment. Three of these models passed the short- and long-term tests and were promoted through the program website (www.pnl.gov/rlamps), press releases, and fliers. To increase the number of qualifying models, a second RFP was issued in June 2005. In April 2007, DOE announced that 16 reflector CFL (R-CFL) models by four manufacturers had met all the minimum requirements of Phase 2 of the R-CFL Technology Innovation Competition. PNNL developed both the criteria and the test apparatus design for Elevated Temperature Life Testing (ETLT), which has been included by DOE in its draft ENERGY STAR specifications for the reflector category of CFLs. PNNL promoted the winning lamps through a program website, press releases, and fliers as well as through program partners. PNNL also helped engage distributors including Costco, the Home Depot, Bonneville Power Administration, and utility organizations
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