32,214 research outputs found
Shifting Into Gear: A Comprehensive Guide to Creating a Car Ownership Program
Offers detailed strategies for organizations pursuing car ownership programs to help low-income residents obtain vehicles for employment access and family economic improvement
Preferences over Meyer’s Location-Scale Family
This paper extends Meyer’s (1987) location-scale family with general n random seed sources. Firstly, we clarify and generalize existing results to this multivariate setting. Some useful geometrical and topological properties of the location-scale expected utility functions are obtained. Secondly, we introduce and study some general non-expected utility functions defined over the location-scale (LS) family. Special care is made in characterizing the shape of the indifference curves induced by the LS expected utility functions and non-expected utility functions. Finally, efforts are also made to study several well-defined partial orders and dominance relations defined over the LS family. These include the first-, second- order stochastic dominance, the mean -variance rule, and a newly defined location-scale dominance.
Renminbising China's Foreign Assets
Since the 2008 global financial crisis, China has rolled out a number of initiatives to actively promote the international role of the renminbi and to denominate more of its international claims away from the US dollar and into the renminbi. This paper discusses the factors shaping the prospects of internationalising the renminbi from the perspective of the currency composition of China’s international assets and liabilities. These factors include, among others, underlying valuation and management of the renminbi.renminbi internationalisation, net international asset position, convertibility, exchange rate uncertainty, dollar peg
A Content Analysis of Interviewee Reports of Medical School Admissions Interviews
Introduction. Prospective medical school applicants use Internet websites to gain information about medical school interviews as well as to offer their experience in such interviews. This study examined applicants’ reported experiences of interviews and compared them to the purposes of the interview as purported by medical schools.
Method. Content analysis of student feedback regarding medical school interviews at 161 medical schools was conducted for entries of over 4600 students applying to medical school who anonymously and voluntarily completed an online questionnaire.
Results. Across all medical schools, nearly one half of all cited interview questions addressed non-cognitive characteristics of the applicants. Top ranked medical schools were reported to ask significantly more interpersonal and illegal questions and fewer academic/general knowledge questions than other medical schools. Lower ranked schools did not differ significantly in the types of questions reportedly asked applicants compared to other medical schools.
Discussion. Medical school interviews are generally gathering types of information about applicants that admissions personnel identify as important in the admission decision. In addition to measuring interpersonal characteristics, medical school admissions interviews are assessing cognitive abilities and ethical decision-making. Sources on the Internet provide actual medical school interview questions to prospective students. This practice can help them gain an undue advantage in interviewing. Admissions committees and faculty who interview students may want to consider how best to obtain accurate and valid responses from applicants
Reversible, Opto-Mechanically Induced Spin-Switching in a Nanoribbon-Spiropyran Hybrid Material
It has recently been shown that electronic transport in zigzag graphene
nanoribbons becomes spin-polarized upon application of an electric field across
the nanoribbon width. However, the electric fields required to experimentally
induce this magnetic state are typically large and difficult to apply in
practice. Here, using both first-principles density functional theory (DFT) and
time-dependent DFT, we show that a new spiropyran-based, mechanochromic polymer
noncovalently deposited on a nanoribbon can collectively function as a dual
opto-mechanical switch for modulating its own spin-polarization. These
calculations demonstrate that upon mechanical stress or photoabsorption, the
spiropyran chromophore isomerizes from a closed-configuration ground-state to a
zwitterionic excited-state, resulting in a large change in dipole moment that
alters the electrostatic environment of the nanoribbon. We show that the
electronic spin-distribution in the nanoribbon-spiropyran hybrid material can
be reversibly modulated via noninvasive optical and mechanical stimuli without
the need for large external electric fields. Our results suggest that the
reversible spintronic properties inherent to the nanoribbon-spiropyran material
allow the possibility of using this hybrid structure as a resettable,
molecular-logic quantum sensor where opto-mechanical stimuli are used as inputs
and the spin-polarized current induced in the nanoribbon substrate is the
measured output.Comment: Accepted by Nanoscal
Klein Levin syndrome is a steroid-responsive, non-N-methyl-D-aspartate receptor-mediated encephalitis
Poster SessionBACKGROUND: Klein Levin syndrome is a rare neuropsychiatric disorder with periodic hypersomnia, cognitive and behavioural disturbance. It is postulated to be triggered by a viral illness or is a postinfectious immune-mediated encephalitis. With an increasing awareness of immune-med...published_or_final_versio
Multiband gravitational-wave event rates and stellar physics
Joint gravitational-wave detections of stellar-mass black-hole binaries by
ground- and space-based observatories will provide unprecedented opportunities
for fundamental physics and astronomy. We present a semianalytic method to
estimate multiband event rates by combining selection effects of ground-based
interferometers (like LIGO/Virgo) and space missions (like LISA). We forecast
the expected number of multiband detections first by using information from
current LIGO/Virgo data, and then through population synthesis simulations of
binary stars. We estimate that few to tens of LISA detections can be used to
predict mergers detectable on the ground. Conversely, hundreds of events could
potentially be extracted from the LISA data stream using prior information from
ground detections. In general, the merger signal of binaries observable by LISA
is strong enough to be unambiguously identified by both current and future
ground-based detectors. Therefore third-generation detectors will not increase
the number of multiband detections compared to LIGO/Virgo. We use population
synthesis simulations of isolated binary stars to explore some of the stellar
physics that could be constrained with multiband events, and we show that
specific formation pathways might be overrepresented in multiband events
compared to ground-only detections.Comment: 17 pages, 11 figures. Database and python code available at
https://github.com/dgerosa/spops - Published in PR
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