With conventional time-of-flight sonar ranging systems, it is impossible to differentiate a reflection from a plane and from a rightangle corner reflector. A multitransducer pulse/echo ranging system is described that differentiates these two reflectors by exploiting the physical properties of sound propagation. The amplitudes and ranges of reflected signals for the different transmitter and re...

The paper describes a novel approach for the generation of 3D building models from airborne laserscanner data, which is based on the detection of straight lines in specific 2D projections of the data. First, the main roof ridge directions of a building are determined. Based on these ridge directions, hypotheses on the roof orientation are generated. The whole point cloud is rotated by the roof ...

In this study, the nature of the spatial representations of an environment acquired from maps, navigation, and virtual environments (VEs) was assessed. Participants first learned the layout of a simple desktop VE and then were tested in that environment. Then, participants learned two floors of a complex building in one of three learning conditions: from a map, from direct experience, or by tra...

Photosystem I (PSI) is a key element in Nature’s photosynthesis and an attractive building block for bio-inspired solar energy conversion systems. In article number 1600393, Ryan C. Chiechi, Andreas Herrmann, and co-workers describe how phage display enables the selection of small peptides that allow almost perfect orientation of PSI on semiconductor electrodes in solid state bio-photovoltaic d...

This special session features scientists and developers building innovative interactive virtual environments that can be used for science education from kindergarten through college. The four projects presented in this session focus on different areas of science, from space physics to entomology, but they share a common educational orientation towards participatory learning using Internet acces...

Operating from the margins of the formal curriculum and with relatively limited resources, student orientation faces unique teaching and learning challenges in representing the ideas and values of the academic world in a form that is relevant and engaging for prospective students in the non-academic world outside. Online learning adds a further layer of complexity in the technical medium throug...

Orientation selectivity is a fundamental, emergent property of neurons in early visual cortex, and the discovery of that property has dramatically shaped how we conceptualize visual processing. However, much remains unknown about the neural substrates of this basic building block of perception, and what is known primarily stems from animal physiology studies. To probe the neural concomitants of...

Purpose This study aims to investigate three relevant antecedents of digital transformation (digital orientation, intensity and maturity) their influences on the financial success companies. Design/methodology/approach Building strategic management literature, five hypotheses are developed find relationships between these success. Findings Digital orientation alone do not contribute Specificall...

We present a simulation system that can simulate a three-dimensional urban model over time. The main novelty of our approach is that we do not rely on land-use simulation on a regular grid, but instead build a complete and inherently geometric simulation that includes exact parcel boundaries, streets of arbitrary orientation, street widths, 3D street geometry, building footprints, and 3D buildi...

nowadays, numerous realities in the field of architecture has gathered architects’ concentration; this has alienated designer’s attention from theoretical thinking in the initial stages of design process. new considerations such as human attitude and orientation in urban areas, the environmental impacts, behavioral relations between man and building, considering sociology and psychology in crea...