285 research outputs found
BIM in teaching â lessons learned from exploratory study
Building Information Technology bears promise to bring
integration into fragmented AEC industry, as well as large
potentials for optimization and management of building performance
along life cycle. However, the adoption in Central
Europe is much slower than in the USA or Scandinavia; the
designers and planners are sceptical about BIM benefits. In
order to build up capabilities and thus support BIM adoption
in the practice, BIM skills have be built up already in university
teaching. This endeavour is the central aim of the BIM_sustain
project accomplished at the Vienna University of Technology.
In winter term 2012/13 and winter term 2013/14 we accomplished
interdisciplinary BIM-supported design labs with
student participants from architecture, civil engineering and
building science. The teams used different modelling and simulation
software constellations for building design and analysis.
The software-constellations were evaluated in terms of BIMinteroperability,
and the design process was documented by
means of time and activity assessment, surveys on team performance,
process satisfaction and technology acceptance and
focus group interviews. In this paper we will present the results
of the evaluation of both courses and analyse the differences
resulting from the different course design in the two consequent
terms. The first course was dominated by the issue of
interfaces, whereas the second course, where better functioning
software combinations in terms of data transfer were used,
was dominated by the issues related to the collaboration and
teamwork. Our results are not only informative for the configuration
of interdisciplinary BIM-supported university teaching,
but can be derived for the practice as well, especially in the
areas of project management, software usage, modelling conventions
or incentive systems
The anatomy of a horizontally impacted maxillary wisdom tooth
A completely horizontally impacted upper third molar was revealed after routine
dissection of a 62-year-old human cadaver of a Caucasian male. The molar
was penetrating into the maxillary sinus and there was antral dehiscence of its
bony alveolus. The bony alveolus was immediately in front of the greater palatine
canal contents, and the bottom of the alveolus was dehiscent towards
the greater palatine foramen. Within the greater palatine canal and foramen
the greater palatine artery was duplicated and the nerve was found. Such antral
relations of an impacted upper third molar predispose to oroantral communications
if extraction is performed, while the close neurovascular relations
represent a risk factor for postextractional haemorrhage and neurosensory disturbances
and must be borne in mind when deciding on or performing the
extraction. (Folia Morphol 2008: 67: 154–156
Multilinear Wavelets: A Statistical Shape Space for Human Faces
We present a statistical model for D human faces in varying expression,
which decomposes the surface of the face using a wavelet transform, and learns
many localized, decorrelated multilinear models on the resulting coefficients.
Using this model we are able to reconstruct faces from noisy and occluded D
face scans, and facial motion sequences. Accurate reconstruction of face shape
is important for applications such as tele-presence and gaming. The localized
and multi-scale nature of our model allows for recovery of fine-scale detail
while retaining robustness to severe noise and occlusion, and is
computationally efficient and scalable. We validate these properties
experimentally on challenging data in the form of static scans and motion
sequences. We show that in comparison to a global multilinear model, our model
better preserves fine detail and is computationally faster, while in comparison
to a localized PCA model, our model better handles variation in expression, is
faster, and allows us to fix identity parameters for a given subject.Comment: 10 pages, 7 figures; accepted to ECCV 201
Approaches and Directions for the Physiotherapeutic Management of Patients with âDuchenneâ Muscular Dystrophy
Duchenne muscular dystrophy (DMD) affects cardiac and skeletal muscles but represents a condition that causes numerous secondary pathologies. Although there is no curative treatment available, multidisciplinary approaches, centered on the needs of the patient, improve the quality and duration of life. Therapies such as physiotherapy, occupational therapy, physical activities, and respiratory physiotherapy, but also the management of cardiac, osteo-muscular, and neuro-psychiatric manifestations, are continuously developing, (as new data becomes available) and are the key to DMD management today. These multidisciplinary approaches can lead to good long-term outcomes by helping patients with muscular dystrophy reduce muscle damage, early detect and treat heart failure, and manage cognitive impairment as best they can
Color-accurate underwater imaging using perceptual adaptive illumination
Capturing color in water is challenging due to the heavy non-uniform attenuation of light in water across the visible spectrum, which results in dramatic hue shifts toward blue. Yet observing color in water is important for monitoring and surveillance as well as marine biology studies related to species identification, individual and group behavior, and ecosystem health and activity monitoring. Underwater robots are equipped with motor control for large scale transects but they lack sensors that enable capturing color-accurate underwater images. We present a method for color-accurate imaging in water called perceptual adaptive illumination. This method dynamically mixes
the illumination of an object in a distance-dependent way using a controllable multi-color light source. The color mix compensates correctly for color loss and results in an image
whose color composition is equivalent to rendering the object in air. Experiments were conducted with a color palette in the pool and at three different coral reefs sites, and with an underwater
robot collecting image data with the new sensor.United States. Office of Naval Research (Project N000140911051
Scattering of slow-light gap solitons with charges in a two-level medium
The Maxwell-Bloch system describes a quantum two-level medium interacting
with a classical electromagnetic field by mediation of the the population
density. This population density variation is a purely quantum effect which is
actually at the very origin of nonlinearity. The resulting nonlinear coupling
possesses particularly interesting consequences at the resonance (when the
frequency of the excitation is close to the transition frequency of the
two-level medium) as e.g. slow-light gap solitons that result from the
nonlinear instability of the evanescent wave at the boundary. As nonlinearity
couples the different polarizations of the electromagnetic field, the
slow-light gap soliton is shown to experience effective scattering whith
charges in the medium, allowing it for instance to be trapped or reflected.
This scattering process is understood qualitatively as being governed by a
nonlinear Schroedinger model in an external potential related to the charges
(the electrostatic permanent background component of the field).Comment: RevTex, 14 pages with 5 figures, to appear in J. Phys. A: Math. Theo
The Arabidopsis thaliana-Alternaria brassicicola pathosystem: A model interaction for investigating seed transmission of necrotrophic fungi
Seed transmission constitutes a major component of the parasitic cycle for several fungal pathogens. However, very little is known concerning fungal or plant genetic factors that impact seed transmission and mechanisms underlying this key biological trait have yet to be clarified. Such lack of available data could be probably explained by the absence of suitable model pathosystem to study plant-fungus interactions during the plant reproductive phase
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