julilili42/papers huggingface dataset:
Evaluation of the current status of Rehabilitation, Physical Medicine and Naturopathy education 10 years after the reform of the Medical Licensure Act – a nationwide survey of German Medical Universities
2017-02-15

Introduction: After the reform of the German Medical Licensure Act of 2003, Rehabilitation, Naturopathy and Physical Medicine were integrated into one discipline to be taught in Medical University. The aim of this survey is to determine the outcome of this change by evaluating the current status of education of these three disciplines based on the experience and satisfaction reported by lecturers responsible for teaching these subjects to medical students. Methods: A questionnaire-based survey. A paper version of the questionnaire for each discipline was posted to each Medical University in Germany. The first part asked about the current status of teaching; the second part asked about facilities and requirements; the third part asked respondents to give information on their career and teaching experience in this subject Results: The response rate was 51.5% for Rehabilitation, 48.5% for Physical Medicine and 60.6% for Naturopathy. A vast range of people and faculties were involved in the curricula. The percentage of each discipline taught was unevenly distributed: the major proportion being rehabilitation (38%), then naturopathy 34% lastly physical medicine with less than a third (28%). The main delivery of these disciplines was through lectures in plenary sessions. Modern teaching methods were not in evidence. Lecturers were generally pleased to be working with the combination of the three disciplines. Conclusion: Future medical education should improve upon teaching coordination and aim towards a common curriculum for these three disciplines. Expected future changes to medical curricula will provide opportunities to improve the implementation of Rehabilitation, Physical Medicine and Naturopathy in teaching and research.
Sleep enhances knowledge of routes and regions in spatial environments
2017-02-15

Sleep is thought to preferentially consolidate hippocampus-dependent memory, and as such, spatial navigation. Here, we investigated the effects of sleep on route knowledge and explicit and implicit semantic regions in a virtual environment. Sleep, compared with wakefulness, improved route knowledge and also enhanced awareness of the semantic regionalization within the environment, whereas signs of implicit regionalization remained unchanged. Results support the view that sleep specifically enhances explicit aspects of memory, also in the spatial domain. Enhanced region knowledge after sleep suggests that consolidation during sleep goes along with the formation of more abstract schema-like representations.
How much GK is in the NKLM? A comparison between the catalogues of exam-relevant topics (GK) and the German National Competence-based Learning Objectives Catalogue for Undergraduate Medical Education (NKLM)
2017-02-15

Background: The German National Competence-Based Learning Objectives for Undergraduate Medical Education (NKLM) being adopted in 2015 is designed to contribute to improve the quality of teaching and learning in medicine with respect to competence orientation. For departments, the coherence between teaching, assessment and the content of the catalogues of exam-relevant topics (GK) is a crucial factor. Before making use of the NKLM seriously in curricular development, many faculties demand more transparency regarding the representation in the NKLM of GK topics and in what aspects the NKLM exceeds the GK. Therefore, the aim of the study was to assign the NKLM competencies and objectives to the systematic GK terms, to reveal gaps in their congruence and to determine the percentage of agreement between GK and NKLM. Additionally, the distribution among the NKLM chapters (chap.), of GK content and further competencies relevant for medical practice were analysed. Methods: The textual comparison of GK and NKLM was done by advanced students that were familiar with the NKLM from previous analyses. The comparison was done independently (keyword search, face validity), afterwards consented and matched with independent ratings of GK-2 and chapter 21 done by experts as well as with cross-references to the GK indicated in chapter 12, 13 and 15 of the NKLM. Detailed data is available online: [link:www.merlin-bw.de/gk-nklm-abgleich.html*http://www.merlin-bw.de/gk-nklm-abgleich.html]. Results: The degree of correspondence of the GK’s six preclinical parts with the NKLM ranges between 94% and 98%, with the clinical GK the degree of correspondence ranging between 84% and 88%. This demonstrates a consistently very high congruence of content. Only 6-16% of the content per GK part could not be assigned to NKLM equivalents. Regarding the distribution of GK content among NKLM chapters, the chapters with classic medical expertise (chapters 12, 13, 16, 17 as well as 20 and 21) show the highest correspondences. Practical medical skills (chapter 14b) can be found in the clinical GK “Health Disorders”. Doctor-patient interaction (chapter 14c) and medical scientific skills (chapter 14a) are represented only marginally in the GK. As expected, there were no equivalents to be found in the GK for the new professional roles for medical doctors (chapter 06-11). Discussion: The results presented provide faculties with a useful and detailed data base to evaluate the NKLM more reliably, especially with respect to its relevance for exams. The increased transparency supports the implementation process of the NKLM by reducing content-related uncertainties of departments, invalidating sweeping arguments against the NKLM resulting from uncertainties and thereby minimizing resistance. At the same time a critical review process of the NKLM is encouraged.
Vibrational dephasing in matter-wave interferometers
2017-02-15

Matter-wave interferometry is a highly sensitive tool to measure small perturbations in a quantum system. This property allows the creation of precision sensors for dephasing mechanisms such as mechanical vibrations. They are a challenge for phase measurements under perturbing conditions that cannot be perfectly decoupled from the interferometer, e.g. for mobile interferometric devices or vibrations with a broad frequency range. Here, we demonstrate a method based on second-order correlation theory in combination with Fourier analysis, to use an electron interferometer as a sensor that precisely characterizes the mechanical vibration spectrum of the interferometer. Using the high spatial and temporal single-particle resolution of a delay line detector, the data allows to reveal the original contrast and spatial periodicity of the interference pattern from "washed-out" matter-wave interferograms that have been vibrationally disturbed in the frequency region between 100 and 1000 Hz. Other than with electromagnetic dephasing, due to excitations of higher harmonics and additional frequencies induced from the environment, the parts in the setup oscillate with frequencies that can be different to the applied ones. The developed numerical search algorithm is capable to determine those unknown oscillations and corresponding amplitudes. The technique can identify vibrational dephasing and decrease damping and shielding requirements in electron, ion, neutron, atom and molecule interferometers that generate a spatial fringe pattern on the detector plane.
Polyketide Bioderivatization Using the Promiscuous Acyltransferase KirCII
2017-02-16

During polyketide biosynthesis, acyltransferases (ATs) are the essential gatekeepers which provide the assembly lines with precursors and thus contribute greatly to structural diversity. Previously, we demonstrated that the discrete AT KirCII from the kirromycin antibiotic pathway accesses nonmalonate extender units. Here, we exploit the promiscuity of KirCII to generate new kirromycins with allyl- and propargyl-side chains in vivo, the latter were utilized as educts for further modification by "click" chemistry.
A Comparison of Unidimensionality and Measurement Precision of the Narcissistic Personality Inventory and the Narcissistic Admiration and Rivalry Questionnaire
2017-02-16

The current study compares the closeness to unidimensionality (CU) and measurement precision (MP) of the Narcissistic Personality Inventory (NPI)—with either a pairwise forced-choice or 5-point Likert-type scale response format—to the Narcissistic Admiration and Rivalry Questionnaire (NARQ). Minimum rank factor analysis and item information curves from item response models were utilized. The results mainly confirmed our expectations that NPI subscales are lower in CU and MP compared with NARQ subscales when the NPI was administered with its traditional forced-choice response format. When the NPI was administered with a 5-point Likert-type scale response format, the NPI subscale Leadership/Authority and NPI Grandiose Exhibitionism showed similarly high levels of CU and MP as the two NARQ subscales. While the NPI subscale Entitlement/Exploitativeness had a higher CU than the NARQ subscales it showed considerably lower levels of MP.
Total proximal ureter substitution using buccal mucosa
2017-02-16

Abstract The surgical treatment of a long proximal ureteral stricture is a challenging situation for reconstructive surgeons. Despite the underlying morbidities, ileal interposition and autotransplantation are the options available to treat complex cases of long segment ureteral stricture. Buccal mucosa has shown excellent results in urethroplasty. However, its use in ureteral reconstruction is infrequent. We report on a 64‐year‐old female patient with multiple comorbidities and prior abdominal surgeries for Crohn's disease who underwent a successful total substitution of a long segment of the proximal ureter using buccal mucosa. Regular postoperative isotope scans showed improvement in renal function. Based on the pleasant outcome of this case and review of the literature, buccal mucosa might be a viable option with low morbidity in selected cases.
Sleep Supports the Slow Abstraction of Gist from Visual Perceptual Memories
2017-02-17

Abstract Sleep benefits the consolidation of individual episodic memories. In the long run, however, it may be more efficient to retain the abstract gist of single, related memories, which can be generalized to similar instances in the future. While episodic memory is enhanced after one night of sleep, effective gist abstraction is thought to require multiple nights. We tested this hypothesis using a visual Deese-Roediger-McDermott paradigm, examining gist abstraction and episodic-like memory consolidation after 20 min, after 10 hours, as well as after one year of retention. While after 10 hours, sleep enhanced episodic-like memory for single items, it did not affect gist abstraction. One year later, however, we found significant gist knowledge only if subjects had slept immediately after encoding, while there was no residual memory for individual items. These findings indicate that sleep after learning strengthens episodic-like memories in the short term and facilitates long-term gist abstraction.
OCTN1 Is a High-Affinity Carrier of Nucleoside Analogues
2017-02-17

Abstract Resistance to xenobiotic nucleosides used to treat acute myeloid leukemia (AML) and other cancers remains a major obstacle to clinical management. One process suggested to participate in resistance is reduced uptake into tumor cells via nucleoside transporters, although precise mechanisms are not understood. Through transcriptomic profiling, we determined that low expression of the ergothioneine transporter OCTN1 (SLC22A4; ETT) strongly predicts poor event-free survival and overall survival in multiple cohorts of AML patients receiving treatment with the cytidine nucleoside analogue cytarabine. Cell biological studies confirmed OCTN1-mediated transport of cytarabine and various structurally related cytidine analogues, such as 2′deoxycytidine and gemcitabine, occurs through a saturable process that is highly sensitive to inhibition by the classic nucleoside transporter inhibitors dipyridamole and nitrobenzylmercaptopurine ribonucleoside. Our findings have immediate clinical implications given the potential of the identified transport system to help refine strategies that could improve patient survival across multiple cancer types where nucleoside analogues are used in cancer treatment. Cancer Res; 77(8); 2102–11. ©2017 AACR.
Prominent Oncogenic Roles of EVI1 in Breast Carcinoma
2017-02-17

Abstract Overexpression of the EVI1 oncogene is associated typically with aggressive myeloid leukemia, but is also detectable in breast carcinoma where its contributions are unexplored. Analyzing a tissue microarray of 608 breast carcinoma patient specimens, we documented EVI1 overexpression in both estrogen receptor–positive (ER+) and estrogen receptor–negative (ER−) breast carcinomas. Here, we report prognostic relevance of EVI1 overexpression in triple-negative breast carcinoma but not in the HER2-positive breast carcinoma subset. In human breast cancer cells, EVI1 silencing reduced proliferation, apoptosis resistance, and tumorigenicity, effects rescued by estrogen supplementation in ER+ breast carcinoma cells. Estrogen addition restored ERK phosphorylation in EVI1-silenced cells, suggesting that EVI1 and estradiol signaling merge in MAPK activation. Conversely, EVI1 silencing had no effect on constitutive ERK activity in HER2+ breast carcinoma cells. Microarray analyses revealed G-protein–coupled receptor (GPR) signaling as a prominent EVI1 effector mechanism in breast carcinoma. Among others, the GPR54-ligand KISS1 was identified as a direct transcriptional target of EVI1, which together with other EVI1-dependent cell motility factors such as RHOJ regulated breast carcinoma cell migration. Overall, our results establish the oncogenic contributions of EVI1 in ER- and HER2-negative subsets of breast cancer. Cancer Res; 77(8); 2148–60. ©2017 AACR.
Hip and pelvic fracture patients with fear of falling: development and description of the “Step by Step” treatment protocol
2017-02-17

Objective: Based on a theoretical framework and sound evidence, this article describes a rehabilitation programme for patients with fear of falling after hip and pelvic fracture. Rationale: Based on exercise science principles, current knowledge from fall prevention, emotion regulation, and the Health Action Process Approach we developed a theoretical framework, from which the components of the intervention were derived. Description of the intervention: The intervention consists of 6 components: (1) relaxation, (2) meaningful activities and mobility-based goals, (3) falls related cognitions and emotions, coping with high risk tasks and situations, (4) individual exercise programme, (5) planning and implementing exercises and activities, and (6) fall risks and hazards. The intervention comprises of 8 individual sessions during 3 to 5 weeks of inpatient rehabilitation and 4 telephone calls and 1 home visit over a 2-month post-discharge period. Each session or telephone call takes about 30-60 minutes. It is provided to geriatric hip and pelvic fracture patients with concerns about falling and no cognitive impairment. To ensure completeness of reporting, the Template for Intervention Description and Replication (TIDierR) is used. Results: Fifty-seven patients were assigned to the intervention group. All 46 completers met all pre-defined criteria for an intervention per protocol. Conclusion: The programme is feasible to administer. We have completed a randomised controlled trial, which will be submitted in due time (for trial protocol: www.isrctn.org ; ISRCTN79191813).
Fretting Corrosion Behavior of Experimental Ti-20Cr Compared to Titanium
2017-02-17

Experimental cast titanium alloys containing 20 mass% chromium (Ti-20Cr) show preferable mechanical properties and a good corrosion resistance. This study evaluated the fretting corrosion behavior of Ti-20Cr. Ti-20Cr (n = 4) and commercially pure titanium (CP-Ti, n = 6) disk specimens were used. The fretting corrosion test was performed by electrochemical corrosion at 0.3 V in 0.9% saline solution and mechanical damage using 10 scratching cycles with three different scratching speeds (10–40 mm/s) at 10 N. After testing, the activation peak, repassivation time and surface morphology of each specimen were analyzed. The differences between the results were tested by parametric tests (α = 0.05). The average activation peaks were significantly higher in CP-Ti than in Ti-20Cr (p &lt; 0.01), except at 20 mm/s. In the series of scratching speeds, faster scratching speeds showed higher activation peaks. The maximum activation peaks were also higher in CP-Ti. Slight differences in the repassivation time were observed between the materials at every scratching speed; faster scratching speeds showed shorter repassivation times in both materials (p &lt; 0.05). CP-Ti showed severe damage and significantly higher wear depth than Ti-20Cr (p &lt; 0.05). In conclusion, adding chromium to titanium reduced surface damage and improved the fretting corrosion resistance.
The Planetary Accretion Shock. I. Framework for Radiation-hydrodynamical Simulations and First Results
2017-02-20

Abstract The key aspect determining the postformation luminosity of gas giants has long been considered to be the energetics of the accretion shock at the surface of the planet. We use one-dimensional radiation-hydrodynamical simulations to study the radiative loss efficiency and to obtain postshock temperatures and pressures and thus entropies. The efficiency is defined as the fraction of the total incoming energy flux that escapes the system (roughly the Hill sphere), taking into account the energy recycling that occurs ahead of the shock in a radiative precursor. We focus in this paper on a constant equation of state (EOS) to isolate the shock physics but use constant and tabulated opacities. While robust quantitative results will have to await a self-consistent treatment including hydrogen dissociation and ionization, the results presented here show the correct qualitative behavior and can be understood from semianalytical calculations. The shock is found to be isothermal and supercritical for a range of conditions relevant to the core accretion formation scenario (CA), with Mach numbers . Across the shock, the entropy decreases significantly by a few times . While nearly 100% of the incoming kinetic energy is converted to radiation locally, the efficiencies are found to be as low as roughly 40%, implying that a significant fraction of the total accretion energy is brought into the planet. However, for realistic parameter combinations in the CA scenario, we find that a nonzero fraction of the luminosity always escapes the Hill sphere. This luminosity could explain, at least in part, recent observations in the young LkCa 15 and HD 100546 systems.
Luminosity-dependent changes of the cyclotron line energy and spectral hardness in Cepheus X-4
2017-02-20

Context. X-ray spectra of accreting pulsars are generally observed to vary with their X-ray luminosity. In particular, the hardness of the X-ray continuum is found to depend on luminosity. In a few sources, the correlation between the energy of the cyclotron resonance scattering feature (CRSF) and the luminosity is clear. Different types (signs) of the correlation are believed to reflect different accretion modes. Aims. We analyse two NuSTAR observations of the transient accreting pulsar Cep X-4 during its 2014 outburst. Our analysis is focused on a detailed investigation of the dependence of the CRSF energy and of the spectral hardness on X-ray luminosity, especially on short timescales. Methods. To investigate the spectral changes as a function of luminosity within each of the two observations, we used the intrinsic variability of the source on the timescale of individual pulse cycles (tens of seconds), the so-called pulse-to-pulse variability. Results. We find that the NuSTAR spectrum of Cep X-4 contains two CRSFs: the fundamental line at ~30 keV and its harmonic at ~55 keV. We find for the first time that the energy of the fundamental CRSF increases and the continuum becomes harder with increasing X-ray luminosity not only between the two observations, that is, on the long timescale, but also within an individual observation, on the timescale of a few tens of seconds. We investigate these dependencies in detail including their non-linearity. We discuss a possible physical interpretation of the observed behaviour in the frame of a simple one-dimensional model of the polar emitting region with a collisionless shock formed in the infalling plasma near the neutron star surface. With this model, we are able to reproduce the observed variations of the continuum hardness ratio and of the CRSF energy with luminosity.
Interdisciplinary Research at the Intersection of CALL, NLP, and SLA: Methodological Implications From an Input Enhancement Project
2017-02-20

Despite the promise of research conducted at the intersection of computer‐assisted language learning (CALL), natural language processing, and second language acquisition, few studies have explored the potential benefits of using intelligent CALL systems to deepen our understanding of the process and products of second language (L2) learning. The strategic use of technology offers researchers novel methodological opportunities to examine how incremental changes in L2 development occur during treatment as well as how the longitudinal impacts of experimental interventions on L2 learning outcomes occur on a case‐by‐case basis. Drawing on the pilot results from a project examining the effects of automatic input enhancement on L2 learners’ development, this article explores how the use of technology offers additional methodological and analytical choices for the investigation of the process and outcomes of L2 development, illustrating the opportunities to study what learners do during visually enhanced instructional activities.
A tetracycline-inducible integrative expression system for Streptococcus pneumoniae
2017-02-20

Inducible gene expression systems are very useful to analyze cellular processes. The ability to switch the expression state of genes of interest may even be crucial if essential traits or genetic instability are involved. An integrative plasmid, pTEX2, was designed using the (anhydro)tetracycline-inducible promoter Pxyl/tet from staphylococcal plasmid pRAB11 to control gene expression in Streptococcus pneumoniae. The system was evaluated by expressing genes of the two-component regulatory system ciaRH of S. pneumoniae. With full induction of Pxyl/tet, wild-type levels of the response regulator CiaR were obtained, while the uninduced basal expression was low. Hyperactive variants of the kinase gene ciaH normally causing pronounced genetic instability could be handled without any problems upon cloning into pTEX2. Therefore, the expression system is well suited to express physiological levels of proteins in S. pneumoniae and also to aid regulatory studies.