Dynamics of the in-run in ski jumping: a simulation study

Utilisation d'un modèle de simulation à 4 segments, intégrant les forces aérodynamiques et de friction de la neige pour étudier la dynamique du skieur sur la piste d'élan depuis un départ statique

Using eye-tracking to assess sourcing during multiple document reading: A critical analysis

During the last 15 years, there have been some efforts to extend the use of eye - tracking to researching reading in complex contexts, such as the reading of multiple documents. The research community involved in this extension has been interested in higher - order comprehensio n processes occurring in complex reading contexts, such as sourcing, defined as the processes of attending to, representing, evaluating, and using available or accessible information about the sources of textual content. In this article, we argue that exte nding eye - tracking research to investigate more complex reading contexts has been made without critically reflecting on its validity in those contexts . Specifically, because eye - tracking captures automatic as well as conscious processes, it is currently an open question how consistently eye - tracking captures the strategic sourcing processes that take place during multiple document reading, in particular when using real documents that include salient source information that may attract bottom - up fixations. I n contrast, subjective methods , such as interviews , mainly target conscious processes, and may th erefore be a more valid and generalizable measure of strategic sourcing activities . W e compared sourcing indicators based on eye - tracking measures to sourcing indicated by a post - reading interview. Results suggest ed that curren t eye - tracking indices of sourcin g are not universally valid measures, and that simpler methods, such as asking readers whether they paid attention to source information , may be more suite d to assess strategic sourcing during multiple document reading

Processing and learning from multiple sources: a comparative case study of students with dyslexia working in a multiple source multimedia context

This study investigated how four 10th-grade students with dyslexia processed and integrated information across web pages and representations when learning in a multiple source multimedia context. Eye movement data showed that participants' processing of the materials varied with respect to their initial exploration of the web pages, their overall processing time, and the linearity of their processing patterns, with post-learning interviews indicating the deliberate, strategic considerations underlying each participant's processing pattern. Eye movement data in terms of fixation duration and percentage of regressions also corroborated the findings of formal, diagnostic assessments. Finally, it was found that participants differed with respect to how much factual information they learned from working with the materials and how well they were able to integrate information across the web pages and representations, with results suggesting particular problems with learning factual information and, at the same time,constructing a coherent mental representation of the issue, as well as with drawing on textual information in the integration process. This study brings together two research areas that essentially have been kept apart in theory and research, that is, dyslexia and multimedia learning, and it provides unique information about the role of individual differences in multiple source multimedia contexts

A Monopole Solution in open String Theory

We investigate a solution of the Weyl invariance conditions in open string theory in 4 dimensions. In the closed string sector this solution is a combination of the SU(2) Wess--Zumino--Witten model and a Liouville theory. The investigation is carried out in the $\sigma$ model approach where we have coupled all massless modes (especially an abelian gauge field via the boundary) and tachyon fields. Neglecting all higher derivatives in the field strength we get an exact result which can be interpreted as a monopole configuration living in non--trivial space time. The masses of both tachyon fields are quantized by $c_{wzw}$ and vanish for $c_{wzw} = 1$.Comment: 14 pages, Latex, DESY 93-15

Pharmacological therapies for the prevention of fractures in men

Publisher Copyright: Copyright © 2021 The Cochrane Collaboration. Published by John Wiley & Sons, Ltd.Objectives: This is a protocol for a Cochrane Review (intervention). The objectives are as follows:. To determine the benefits and harms of bisphosphonates, parathyroid or parathyroid-related protein analogues, denosumab, and romosozumab therapy for the primary and secondary prevention of fractures in men.Peer reviewe

Analysis and Visualization of Urban Emission Measurements in Smart Cities

Cities worldwide aim to reduce their greenhouse gas emissions and improve air quality for their citizens. Therefore, there is a need to implement smart city approaches to monitor, model, and understand local emissions to better guide these actions. We present our approach that deploys a number of low-cost sensors through a wireless Internet of Things (IoT) backbone and is thus capable of collecting high-granular data. Based on a flexible architecture, we built an ecosystem of data management and data analytics including processing, integration, analysis, and visualization as well as decision-support systems for cities to better understand their emissions. Our prototype system has so far been tested in two Scandinavian cities. We present this system and demonstrate how to collect, integrate, analyze, and visualize real-time air quality data

Dynamical quasiparticles properties and effective interactions in the sQGP

Dynamical quasiparticle properties are determined from lattice QCD along the line of the Peshier model for the running strong coupling constant in case of three light flavors. By separating time-like and space-like quantities in the number density and energy density the effective degrees of freedom in the gluon and quark sector may be specified from the time-like densities. The space-like parts of the energy densities are identified with interaction energy (or potential energy) densities. By using the time-like parton densities (or scalar densities) as independent degrees of freedom variations of the potential energy densities with respect to the time-like gluon and/or fermion densities lead to effective mean-fields for time-like gluons and quarks as well as to effective gluon-gluon, quark-gluon and quark-quark (quark-antiquark) interactions. The latter dynamical quantities are found to be approximately independent on the quark chemical potential and thus well suited for an inplementation in off-shell parton transport approaches. Results from the dynamical quasiparticle model (DQPM) in case of two dynamical light quark flavors are compared to lattice QCD calculations for the net quark density as well as for the 'back-to-back' differential dilepton production rate by $q-{\bar q}$ annihilation. The DQPM is found to pass the independent tests.Comment: 34 pages, 17 eps-figures; Section 4 modified; Nuclear Physics A in pres

Critical Boundary Conditions for the Effective String

Gauge systems in the confining phase induce constraints at the boundaries of the effective string, which rule out the ordinary bosonic string even with short distance modifications. Allowing topological excitations, corresponding to winding around the colour flux tube, produces at the quantum level a universal free fermion string with a boundary phase nu=1/4. This coincides with a model proposed some time ago in order to fit Monte Carlo data of 3D and 4D Lattice gauge systems better. A universal value of the thickness of the colour flux tube is predicted.Comment: 9 pages + 1 figur

The Use of a Ti-Ni Shape Memory Alloy Ring Bone Fixator During the Retrograde Nailing of Supracondylar Femoral Fractures

Purpose: To identify the effects of using a Ti-Ni shape memory alloy ring shaped bone fixator (SMA-rBF) during the retrograde nailing of supracondylar femoral fractures. Materials and Methods: The authors reviewed 25 patients with a supracondylar femoral fracture treated by retrograde intramedullary nailing with or without SMA-rBF (group S, 12/25; group N, 13/25). Radiological measurements of angular deformity were performed and functional assessments were made using the Sanders grading system

Numerous proteins with unique characteristics are degraded by the 26S proteasome following monoubiquitination

The "canonical" proteasomal degradation signal is a substrateanchored polyubiquitin chain. However, a handful of proteins were shown to be targeted following monoubiquitination. In this study, we established-in both human and yeast cells-a systematic approach for the identification of monoubiquitination-dependent proteasomal substrates. The cellular wild-type polymerizable ubiquitin was replaced with ubiquitin that cannot form chains. Using proteomic analysis, we screened for substrates that are nevertheless degraded under these conditions compared with those that are stabilized, and therefore require polyubiquitination for their degradation. For randomly sampled representative substrates, we confirmed that their cellular stability is in agreement with our screening prediction. Importantly, the two groups display unique features: monoubiquitinated substrates are smaller than the polyubiquitinated ones, are enriched in specific pathways, and, in humans, are structurally less disordered. We suggest that monoubiquitination-dependent degradation is more widespread than assumed previously, and plays key roles in various cellular processes