scholarly journals Rotating objects to recognize them: A case study on the role of viewpoint dependency in the recognition of three-dimensional objects

1995 ◽  
Vol 2 (1) ◽  
pp. 55-82 ◽  
Author(s):  
Michael J. Tarr
Keyword(s):  
Three Dimensional ◽  
Three Dimensional Objects ◽  
Rotating Objects

Does Philosophy ‘Leave Everything as it is’? Even Theology?

1989 ◽  
Vol 25 ◽  
pp. 225-236
Author(s):  
Renford Bambrough
Keyword(s):  
Rocky Mountains ◽  
Three Dimensional ◽  
Two Dimensions ◽  
Three Dimensional Objects ◽  
Black And White ◽  
Aurora Borealis ◽  
The Church

Does photography leave everything as it is? Clearly not. It scalps Uncle George, as he stands at the church door, proudly, innocently, in the role of bride's father, and it decapitates his nephew James, who had until now been a head taller than any other member of the wedding group. It reduces to two dimensions, and to black and white, such solid three-dimensional objects as the Rocky Mountains and St Paul's Cathedral, such colourful scenes and sights as the Aurora Borealis and sunset in the desert.

scholarly journals Case study of ozone anomalies over northern Russia in the 2015/2016 winter: measurements and numerical modelling

2018 ◽  
Vol 36 (6) ◽  
pp. 1495-1505 ◽  
Author(s):  
Yury M. Timofeyev ◽  
Sergei P. Smyshlyaev ◽  
Yana A. Virolainen ◽  
Alexander S. Garkusha ◽  
Alexander V. Polyakov ◽  
...  
Keyword(s):  
Numerical Modelling ◽  
Three Dimensional ◽  
The Arctic ◽  
Atmospheric Models ◽  
Remote Sensing Techniques ◽  
Infrared Fourier Spectrometer ◽  
Northern Russia ◽  
Stratospheric Clouds

Abstract. Episodes of extremely low ozone columns were observed over the territory of Russia in the Arctic winter of 2015/2016 and the beginning of spring 2016. We compare total ozone columns (TOCs) from different remote sensing techniques (satellite and ground-based observations) with results of numerical modelling over the territory of the Urals and Siberia for this period. We demonstrate that the provided monitoring systems (including the new Russian Infrared Fourier Spectrometer IKFS-2) and modern three-dimensional atmospheric models can capture the observed TOC anomalies. However, the results of observations and modelling show differences of up to 20 %–30 % in TOC measurements. Analysis of the role of chemical and dynamical processes demonstrates that the observed short-term TOC variability is not a result of local photochemical loss initiated by heterogeneous halogen activation on particles of polar stratospheric clouds that formed under low temperatures in the mid-winter.

scholarly journals Geosynthetic reinforced column supported embankments and the role of ground improvement installation effects

2018 ◽  
Vol 55 (6) ◽  
pp. 792-809 ◽  
Author(s):  
Daniel J. King ◽  
Abdelmalek Bouazza ◽  
Joel R. Gniel ◽  
R. Kerry Rowe ◽  
Ha H. Bui
Keyword(s):  
Soil Structure ◽  
Ground Improvement ◽  
Three Dimensional ◽  
Installation Effects ◽  
Lateral Forces ◽  
Lateral Resistance ◽  
Embankment Stability ◽  
Numerical Approaches

For geosynthetic reinforced column supported embankments (GRCSE) supporting a high embankment, lateral forces associated with lateral sliding and embankment stability often govern the acceptability of a given design under serviceability conditions. Frequently, the complex soil–structure–geosynthetic interaction, the size, and the three-dimensional nature of a GRCSE necessitate the use of numerical analysis to assess embankment performance relative to serviceability criteria. However, traditional finite element method techniques used to model serviceability behaviour are limited in their ability to model the geotechnical mechanisms associated with column installation, equilibration, and group installation effects. These installation effects are examined herein based on a GRCSE field case study located in Melbourne, Australia, that has been extensively instrumented. The role that these installation effects have on the performance of the GRCSE is highlighted and the behaviour of the columns supporting the embankment is emphasized. It is shown that cracking of the unreinforced columns supporting the embankment is likely inevitable and that the reduction of lateral resistance provided by the columns should be accounted for in design. The suitability of various numerical approaches currently used in design to model the columns supporting the GRCSE, and the embankment itself, are discussed and recommendations are made.

scholarly journals THE ROLE OF 3D DOCUMENTATION FOR RESTORATION INTERVENTIONS. THE CASE STUDY OF VALFLORES IN LOURES, PORTUGAL

2020 ◽  
Vol XLIV-M-1-2020 ◽  
pp. 381-388
Author(s):  
L. Mateus ◽  
V. Ferreira ◽  
J. Aguiar ◽  
P. Pacheco ◽  
J. Ferreira ◽  
...  
Keyword(s):  
Public Engagement ◽  
Public Interest ◽  
Three Dimensional ◽  
Structural Condition ◽  
Conservation History ◽  
3D Documentation ◽  
Condition State ◽  
Important Evidence

Abstract. The house and farm of Valflores, located near Lisbon, are an important evidence of the Portuguese Renaissance civil architecture from the first half of 16th century, built by Jorge de Barros, the overseer of the Portuguese king, D. João III, in Flanders. Its style has its roots in Italian villas. As was common at that time, the property was a villeggiatura site. In 1982 the house and the farm were listed as property of public interest. In 2000 the property was inserted in a Portuguese list of heritage at risk and in 2001 the property was in a state of pre-ruin. It was bought by the municipality in 2006. After 2007 a partnership between a Local Heritage Association (ADPAC), the Municipality of Loures and the Lisbon School of Architecture developed a series of initiatives for the safeguard and restoration of this Heritage. Several studies were performed, including multiple three-dimensional surveys on several occasions. Ultimately, these studies led to the development of a restoration project in 2016 for European funds application. At the present date, the restoration works are going on. The objective of this paper is the discussion of how three-dimensional documentation played a fundamental role on the several stages of this process, namely after 2007, permitting to gain insights about metrics, space and form distributions, deformations, structural condition, state of conservation, history, and allowing dissemination and public engagement.

scholarly journals The role of cone-beam computed tomography in evaluation of an extensive radicular cyst of the maxilla

2021 ◽  
Vol 1 ◽  
pp. 30-33
Author(s):  
Shaik Althaf ◽  
Nishat Hussaini ◽  
A. Srirekha ◽  
Lekha Santhosh
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Case Reports ◽  
Three Dimensional ◽  
Cone Beam ◽  
Radicular Cyst ◽  
Periapical Lesions ◽  
Three Dimensional Objects ◽  
Large Size

Radicular cyst is the second most common odontogenic cyst. Most of these lesions involve the apex of offending tooth and appear as well-defined radiolucencies. When asymptomatic, a cyst can acquire a large size, even extending into anatomic cavities. The present case reports an extensive radicular cyst extending into the maxillary sinus that could have been easily mistaken for just a displaced tooth. Conventional radiographs show two-dimensional images of three-dimensional objects. Cone-beam computed tomography provides undistorted three-dimensional information of hard tissues, gives adequate spatial resolution, and recently seen as an expansion in diagnosis and management of periapical lesions. Prompt diagnosis and treatment of radicular cyst were successful with endodontic treatment and surgical management.

Image processing of conventional TEM images: a catalyst case study

1995 ◽  
Vol 53 ◽  
pp. 118-119
Author(s):  
J. M. Briceño-Valero ◽  
L. Martinez ◽  
K. Moore ◽  
V. Grassian
Keyword(s):  
Image Processing ◽  
Supported Catalysts ◽  
Three Dimensional ◽  
Particle Characterization ◽  
Flatbed Scanner ◽  
Three Dimensional Objects ◽  
Transmission Electron ◽  
Platinum Particles ◽  
Inherent Problem

Particle characterization with the Transmission Electron Microscope (TEM) has the inherent problem of interpreting three dimensional objects from two-dimensional projections. Relevant questions when measuring small particles include how projection of the image will distort measurement of crystallite size, and how will the image distort the morphology of the particle Another difficulty is the effect of overlapping images from two or more particles. In the case of supported catalysts, an additional problem may be termed "differential contrast" which interferes with distinguishing between the supported metal crystallites and the support itself. While these situations may appear to be quite different, the is a shared concern of how the general appearance of the particle image related to its real shape. Image processing technology can be used to extract and display hidden information from conventional TEM micrographs. In this study, platinum particles supported on silica were examines.TEM images were taken at 80,000X magnification with a Hitachi H-600 at 100 kV, digitally acquired using an Imapro QCS 3200 flatbed scanner at 3200 dots per inch.

Pedagogical Evolution in the Teaching of Reference Services Enabled by the Use of 3D Immersive Virtual World Technology

2013 ◽  
pp. 183-196 ◽  
Author(s):  
Nita J. Matzen ◽  
Kim Becnel ◽  
Geraldine Purpur
Keyword(s):  
Role Play ◽  
Three Dimensional ◽  
Real Life ◽  
Comfort Level ◽  
Technology Skills ◽  
Reference Services ◽  
Immersive Virtual Environment ◽  
The Impact

This chapter shares the development and implementation of a redesigned Information Sources and Services course and presents a case study that examines the impact of that course on student learning. The revised course applies Presence Pedagogy incorporating epistemic framing through extended role-play and the use of experienced mentors in a three-dimensional immersive virtual environment. Also examined are: changes in students’ comfort level while playing the role of reference librarian, their technology skills and confidence, similarities and dissimilarities between the game role and an imagined real-life role, students’ comfort level with the presence of a mentor, and their incorporating mentor suggestions.

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