1,612 research outputs found
A Bankruptcy Trap for the Unwary Creditor: Equitable Subordination Resulting from Excess Creditor Control
Una aproximación al trabajo con niños especialmente dotados en matemáticas
Este estudio se centra en el diseño e implementación de tareas que permitan a los futuros profesores identificar el talento matemático de los alumnos, al mismo tiempo que potencian en ellos su desarrollo. El trabajo fue realizado con estudiantes de entre 7 y 11 años, que participaron en cursos extraordinarios de matemática. La tarea se basó en la teoría de situaciones de Brosseau, con algunos conceptos de combinatoria y con movimientos en el espacio. En su desarrollo se utilizó material concreto como medio facilitador hacia la abstracción. Los futuros profesores debían observar la actividad de los alumnos y registrar todos los acontencimientos que, bajo su perspectiva, intervenían el la resolución de la tarea. En los resultados mostramos la potencialidad del trabajo desarrollado, cuáles fueron las características más destacadas que se potenciaron en los alumnos y cuáles fueron las identificadas por los futuros profesores
Introducing TAXI: a Transportable Array for eXtremely large area Instrumentation studies
A common challenge in many experiments in high-energy astroparticle physics
is the need for sparse instrumentation in areas of 100 km2 and above, often in
remote and harsh environments. All these arrays have similar requirements for
read-out and communication, power generation and distribution, and
synchronization. Within the TAXI project we are developing a transportable,
modular four-station test-array that allows us to study different approaches to
solve the aforementioned problems in the laboratory and in the field.
Well-defined interfaces will provide easy interchange of the components to be
tested and easy transport and setup will allow in-situ testing at different
sites. Every station consists of three well-understood 1 m2 scintillation
detectors with nanosecond time resolution, which provide an air shower trigger.
An additional sensor, currently a radio antenna for air shower detection in the
100 MHz band, is connected for testing and calibration purposes. We introduce
the TAXI project and report the status and performance of the first TAXI
station deployed at the Zeuthen site of DESY.Comment: 4 pages, 3 figures, presented at ARENA 2014, Annapolis, MD, June 201
ADJUSTMENT OF FUNCTIONAL ELECTRICAL STIMULATION (FES) ACCORDING TO KNEE FLEXION ANGLE
To clarify the different results of our simulation and FES-cycling tests, measurements on a knee dynamometer were made. The m. quadriceps of 16 healthy test persons was activated both by FES and voluntary contraction. Stimulated with the same level of intensity in a knee flexion angle range from 5° to 105°, the diagrams showed a very unusual course. The knee torque shows its maximum at the knee flexion angle of approx. 30°. Additional isometric measurements using stimulation intensity on constant on-verge-to pain levels for different knee angles were made. The measured courses of the resulting knee torque as a function of the knee angle are much closer to the results of physiologically activated muscle. These measurements show that for optimum power release, the stimulation intensity must be regulated depending on the knee flexion angle
Sport Consumer Behavior Research: Improving Our Game
Sport consumer behavior (SCB) research continues to grow in both popularity and sophistication. A guiding principle in much of this research is that sport consumers seek out sport related experiences, and the benefits they yield, in order to satisfy needs and wants. This approach has provided new knowledge and insight into sport consumers. One outcome of this focus is that the vast majority of research on sport consumers has centered on psychological characteristics of these sport experiences related to evaluative and affective components. In addition, this research has predominately relied on cross-sectional studies and attitudinal surveys to collect information with less emphasis on how various situational or environmental factors can influence attitudinal data patterns at the individual and group level. This special issue seeks to deepen our understanding of SCB by providing seven papers that demonstrate or validate findings using multiple studies or data collections
Measurements and Simulation Studies of Piezoceramics for Acoustic Particle Detection
Calibration sources are an indispensable tool for all detectors. In acoustic
particle detection the goal of a calibration source is to mimic neutrino
signatures as expected from hadronic cascades. A simple and promising method
for the emulation of neutrino signals are piezo ceramics. We will present
results of measruements and simulations on these piezo ceramics.Comment: 5 pages, 5 figure
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Processability of high strength Aluminum-Copper alloys AW-2022 and 2024 by Laser Beam Melting in Powder Bed
Additive Manufacturing offers geometric freedom excellently suited for topology
optimized light weight designs. Ideally these should be produced from materials of high strength
to weight ratio such as aluminium-copper alloys. Yet these are considered unsuitable for welding.
With Laser Beam Melting of Metals in powder bed (LBM), the only class of aluminium alloys
widely processed is that of aluminium-silicon alloys, which are easily weldable and castable, too.
In this contribution we present results of LBM high-strength aluminium-copper alloys AW-2022
and AW-2024 under variation of laser power, scan speed and hatch distance. We achieved
relative densities well above 99 %. We analyzed thin walls, compared process windows as well
as microstructures observed using etched metallographic microsections. We analyzed the
chemical constitution of powders and produced samples using ICP-OES.Mechanical Engineerin
ANALYSIS OF HUMAN MOTION WITH METHODS FROM MACHINE LEARNING
Usually, predefined kinematic parameters are investigated in biomechanical studies of human motion. In recent years, techniques of machine learning have been added to this field of research (Chau, 2001). In this study different dimension reduction methods like Principal Component Analysis (PCA) and Fourier Transformation (FT) are investigated as an alternative to common biomechanical approaches in motion analysis
New media development and strategies for sport mega-events: The Olympic Games and the Football World Cup
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