Collaborating in a Virtual Architectural Environment: The Las Americas Virtual Design Studio (LAVDS)
The paper describes exploratory work in the design, construction, and habitation of a virtual structure (VS) nested within an Internet-based multi-user environment and serving a geographically distributed collective of architecture students and faculty. In addition to a discourse on the design and implementation parameters that were used, the paper seeks to provide findings that make reference to the quality of teaching/learning experience of users and the effectiveness of the interaction among
Hidden Line Elimination in Projected Grid Surfaces
The hidden line and hidden surface problems are simpler when restricted to special classes of objects. An example is the class of grid surfaces, that is, graphs of bivariate functions represented by their values on a set of grid points. Projected grid surfaces have geometric properties which permit hidden line or hidden surface elimination to be done more easily than in the general case. These properties are discussed in this paper, and an algorithm is given which exploits them
h-BN inclusion in a β-Si3N4 grain
The micrograph shows h-BN inclusion (precipitate) in a β-Si3N4 grain (within a silicon nitride particulate-reinforced silicon carbide composite). The occurrence of BN inclusions results from the introduction of colloidal BN into the hot isostatic pressing process. They are formed from B2O3 present as a thin surface film on the BN particles in the barrier layer. B2O3 will be molten during the pressing process and will diffuse rapidly into the powder compact and react with Si3N4 to form BN. Such
Defining Architecture: Defining Information
The rapid onset of information technologies has changed ways we do things and how we view the world. Computation already pervades many aspects of daily life through subtle augmentations and by changing our tools and our professions. Moreover, information technology accelerates the pace of our activities, its speed outstripping our capacity to digest its product. The changes brought on by this deluge force its chroniclers to create new terms. Neologisms spring up daily, often only adding to the c
Beyond Y2k: A Look at Acadia's Present and Future
The sky may not be falling, but it sure is getting closer. Where will you when the last three zeros of our millennial odometer click into place? Computer scientists tell us that Y2K will bring the world?s computer infrastructure to its knees. Maybe, maybe not. But it is interesting that Y2K is an issue at all. Speculating on the future is simultaneously a magnifying glass for examining our technologies and a looking glass for what we become through them. "The future" is nothing new. Orwell's vis
Organisation of Pedestrian Movements: an Agent-Based Approach
Cities are becoming more complex in this digital era due to technological changes. Thinking of cities without such technological changes is equivalent to an embryonic state in the morphology of city growth, that is, the growth seems less advanced. So it is appropriate to think of the non digital city digitally. Urban design is one state which establishes the perfect relationship between the street, people and building. The relationship of the people with the building and street is becoming one o
ECorr: Introduction to Corrosion
This case study gives a brief introduction to the subject of corrosion and helps in learning how to navigate and make use of the subsequent case studies. This is an introductory level case study.
A CAVE-Interface in CAAD-Education
The so called "CAVE-interface" is a very interesting and thrilling development for architects! It supports a better illusion of space by
exposing almost a 270? view of a computer model than the 60? which can be viewed on an ordinary computer screen. At the Lund
University we have got the possibility to experiment with a CAVE-installation, using it in research and the education of CAAD. The
technique and two experiments are discribed. The possibilities are discussed and some problems and question
Pain and Fatigue in People with Multiple Sclerosis
This presentation is by another member of the MS Rehabilitation Research and Training Center, Dr. Dawn Ehde. Dr. Ehde is also the director of the MS Research Training Fellowship program at the University of Washington. She is an expert on the common, but complex, problem of pain in MS, and her research has focused on innovative methods to manage it. Dr. Ehde talks about pain and the most common MS symptom, first reported by researchers at the University of Washington, fatigue. (Series: Mult
Inside Opera: Tristan and Isolde
Opera’s ultimate love story is a favored piece of the Seattle Opera. In this video from the University of Washington, join opera enthusiast and former Seattle Opera education director, the late Perry Lorenzo, as he shares his insider’s knowledge about composer Richard Wagner and his most influential opera, Tristan und Isolde. Lorenzo highlights Wagner’s place in the Romantic movement of 19th century art.
Tensile test on annealed copper: necking effect
Necking of annealed copper during a tensile test, at five times actual speed. From TLP: Introduction to mechanical testing, http://www.msm.cam.ac.uk/doitpoms/tlplib/mechanical-testing/results2.php
Tensile test on annealed copper
Full tensile test of annealed copper at 20 times actual speed, showing plastic deformation, necking and failure. From TLP: Introduction to mechanical testing, http://www.msm.cam.ac.uk/doitpoms/tlplib/mechanical-testing/results2.php
4-point bending under a circular polariscope of annealed polycarbonate bar
Annealed bar undergoing 4-point bending under a circular polariscope, From TLP: Introduction to photoelasticity, http://www.msm.cam.ac.uk/doitpoms/tlplib/photoelasticity/index.html
3-point bending under a circular polariscope of annealed polycarbonate bar with a notch
Annealed, polycarbonate bar with a notch undergoing 3-point bending under a circular polariscope. From TLP: Introduction to photoelasticity, http://www.msm.cam.ac.uk/doitpoms/tlplib/photoelasticity/index.html
3-point bending under a circular polariscope of annealed polycarbonate bar
Annealed, polycarbonate bar undergoing 3-point bending under a circular polariscope, From TLP: Introduction to photoelasticity, http://www.msm.cam.ac.uk/doitpoms/tlplib/photoelasticity/index.html
Interactive model of an screw dislocation
Interactive, rotatable model of an screw dislocation. From TLP: Introduction to dislocations, http://www.msm.cam.ac.uk/doitpoms/tlplib/dislocations/dislocations_in_3D.php
Interactive model of an edge dislocation
Interactive, rotatable model of an edge dislocation. From TLP: Introduction to dislocations, http://www.msm.cam.ac.uk/doitpoms/tlplib/dislocations/dislocations_in_3D.php
Slip by movement of whole lattice planes
Animation of slip by movement of whole lattice planes. Shows how plastic shear deformation occurs in a 2D primitive square lattice without dislocation glide. From TLP: Introduction to dislocations, http://www.msm.cam.ac.uk/doitpoms/tlplib/dislocations/dislocation_glide.php
Slip by dislocation glide
Animation of slip by dislocation glide. Dislocation glide allows plastic deformation to occur at a much lower stress than would be required to move a whole plane of atoms past another. See also the bubble raft experiment (videos 17 and 18). From TLP: Introduction to dislocations, http://www.msm.cam.ac.uk/doitpoms/tlplib/dislocations/dislocation_glide.php
Shear deformation in bubble raft
Bubble raft undergoing shear deformation. The direction along which dislocations generally move is that with the highest resolved shear stress. From TLP: Introduction to dislocations, http://www.msm.cam.ac.uk/doitpoms/tlplib/dislocations/dislocation_motion.php
