A Survey of Information Sources Used for Progress Decisions about Medical Students

Although many medical schools have adopted a variety of methods to assess student competency, the extent to which these innovations have changed how decisions about student progress are made is not clear. This paper describes a survey of 126 accredited allopathic U.S. medical schools to determine which information sources are used for decisions related to medical student progress and graduation. Respondents were asked to indicate up to three information sources used for seven specific decisions about student progress. The results indicate that multiple choice questions (MCQs) and faculty ratings remain the most frequently used information sources. Clinical skills education in the pre-clinical curriculum is the area with the broadest use of assessments for progress decisions. Several explanations are suggested for the primacy of MCQs and faculty ratings in student decisions, including familiarity for faculty and students, ease of implementation and the resources required for the adoption of other assessment strategies

Low temperature photoluminescence imaging and time-resolved spectroscopy of single CdS nanowires

Time-resolved photoluminescence (PL) and micro-PL imaging were used to study single CdS nanowires at 10 K. The low-temperature PL of all CdS nanowires exhibit spectral features near energies associated with free and bound exciton transitions, with the transition energies and emission intensities varying along the length of the nanowire. In addition, several nanowires show spatially localized PL at lower energies which are associated with morphological irregularities in the nanowires. Time-resolved PL measurements indicate that exciton recombination in all CdS nanowires is dominated by non-radiative recombination at the surface of the nanowires.Comment: 9 pages, 3 figures, to be published in Applied Physics Letter

Conditional Image-Text Embedding Networks

This paper presents an approach for grounding phrases in images which jointly learns multiple text-conditioned embeddings in a single end-to-end model. In order to differentiate text phrases into semantically distinct subspaces, we propose a concept weight branch that automatically assigns phrases to embeddings, whereas prior works predefine such assignments. Our proposed solution simplifies the representation requirements for individual embeddings and allows the underrepresented concepts to take advantage of the shared representations before feeding them into concept-specific layers. Comprehensive experiments verify the effectiveness of our approach across three phrase grounding datasets, Flickr30K Entities, ReferIt Game, and Visual Genome, where we obtain a (resp.) 4%, 3%, and 4% improvement in grounding performance over a strong region-phrase embedding baseline.Comment: ECCV 2018 accepted pape

Die Entwicklung der Vektorrechnung im französischen Mathematikunterricht seit Ende des 19. Jahrhunderts

Zusammenfassung: Dieser Text ist Teil eines größeren Forschungsprojekts über die Verbindungen zwischen Mathematik und Physik und stellt eine Analyse der Geschichte der Vektorrechnung im Unterricht in Frankreich dar, von ihren ersten Anfängen in der Sekundarstufe am Ende des 19 Jhd. bis zur Gegenwart. Unsere Analyse stützt sich auf einen theoretischen Rahmen, der durch die "Oekologie des Wissens" inspiriert ist (Chevallard, 1994). Über das historische Interesse hinaus wollen wir einen Bereich des Mathematikunterrichtes beleuchten (der unter dem Einfluss der jüngsten Reformen immer kleiner und kleiner wird) sowie seinen Bezug zum Physikunterricht, der - obwohl er von beiden Seiten als natürlich angesehen wird - nicht wirklich als effektive Unterstützung der Lehrer der jeweiligen Disziplin zu dienen schein

Key physicochemical characteristics governing organic micropollutant adsorption and transport in ion-exchange membranes during reverse electrodialysis

The co-generation of electricity and electrodialysis of seawater in a hybrid system is a promising approach to overcome water scarcity. Reverse electrodialysis harvests energy from the salinity gradient, where seawater is used as a high salinity stream while secondary treated wastewater can be used as a sustainable low salinity stream. Treated wastewater contains organic micropollutants, which can be transported to the seawater stream. The current research establishes a connection between adsorption and transport of organic micropollutants in ion exchange membranes, using a cross-flow stack in adsorption and zero-current experiments. To mimic the composition of treated wastewater, a mixture of nineteen organic micropollutants of varied physicochemical characteristics (e.g. size, charge, polarity, hydrogen donor/acceptor count, hydrophobicity) at environmentally relevant concentrations was used. Depending on the charge, micropollutants develop different types of mechanisms responsible for short-distance interactions with ion-exchange membranes, which has a direct influence in their transport behavior. This study provides a rational basis for the optimization/design of next-generation ion-exchange membranes, in which the permeability toward organic micropollutants should be also included. This investigation highly contributes to understanding the potential hazard posed by organic micropollutants in reverse electrodialysis in seawater desalination systems, where treated wastewater is used as a low salinity stream

iPads, iBooks, Apps! What\u27s all the iFuss about?

The iVolution is here. It is iThis and iThat every way you turn. Is this just another iFad, or is it truly revolutionizing education? In a recent survey conducted by EDUCAUSE Center for Analysis and Research on undergraduates and technology, 31% of students reported owning tablet technology a 15% increase from the previous year and 76% of students reported owning smart phones. This finding was a 14% increase from the previous year. Students also reported using smart devices in class to access material, participate in activities, look up information and photograph material as learning strategies. Thomas Jefferson University is riding the iWave and taking strides to better integrate technology at all levels of medical training; leading the forefront of the iVolution, syllabi, course materials, and textbooks are now delivered in some of our courses via iPads. In the past few years, the Jefferson Health Mentors Program has embraced the use of new technologies, including Wikis, online discussion boards, Google docs, and Skype platforms to facilitate asynchronous IPE interactions. These platforms have helped to promote IPE by easing scheduling logistics and by allowing students to collaborate electronically on team-based assignments. Over the past summer, JCIPE, the Jefferson Health Mentors Program (JHMP), faculty from Jefferson Medical College and the School of Health Professions, Academic & Instructional Support & Resources (AISR) and Jeff Information Technology (IT) assembled a working group and developed yet another innovative tool to better integrate technology into our IPE efforts – the product was a new iBook, entitled “Assessing Patient Safety.