FATA MORGANA UBC Master of Fine Arts Graduate Exhibition 2021
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Atmospheric Optics - II First Midterm Exam Is This Friday!
Atmospheric Optics - II First midterm exam is this Friday! The exam will be in-class, during our regular lecture • this Friday September 28 at 9:30 am The exam will be CLOSED BOOK • ♦ No textbooks ♦ No calculators ♦ No cheat-sheets Alternate seating • The grades will be posted on WebCT • The exam covers Chapters 1,2,3,4,5, and 19. • The sections which are not covered are listed on the • Class Notes web page. RECAP • Human perception of color, white objects, black objects. Light scattering: light is sent in all directions –forward, sideways and • backward ♦ Geometric scattering: R>>λ (all wavelengths equally scattered) ♦ Mie scattering: R~λ (red is scattered more efficiently) ♦ Rayleigh scattering: R<<λ (blue is scattered more efficiently) Phenomena: white clouds, blue skies, hazy skies, crepuscular rays, colorful • sunsets, blue moon. TODAY: Refraction: the bending of the light ray as it travels from one medium to • another. It bends towards the vertical if it enters a more-dense medium and away from the vertical as it enters a less-dense medium. ♦ Phenomena: stars appear higher in the sky, twinkling, twilight. • Reflection: the angle of incidence is equal to the angle of reflection • Total internal reflection: mirages Dispersion: separation of colors when light travels through a medium. • ♦ rainbow Reflection and Refraction of Light The speed of light in vacuum • is c=300,000 km/s Snell’s law: The angle of • incidence is equal to the angle of reflection. Light that enters a more- • dense medium slows down and bends toward the normal. Light that exits a more- • dense medium speeds up and bends away from the normal. -
Abbas Akhavan B. 1977, Tehran, Iran Lives and Works in Montreal, Canada
Abbas Akhavan b. 1977, Tehran, Iran Lives and works in Montreal, Canada Education 2006 Master of Fine Arts, University of British Columbia, Vancouver, Canada 2004 Bachelor of Fine Arts, Concordia University, Montreal, Canada Selected Solo Exhibitions 2021 Chisenhale Gallery, London, UK Mount Stuart House, Isle of Bute, Scotland 2019 They asked the fox, “Who is your witness?” He said, “My tail.”, Catriona Jeffries, Vancouver script for an island, Fogo Island Gallery, Fogo Island, Canada cast for a folly, CCA Wattis Institute for Contemporary Arts, San Francisco, USA 2018 Folly, Vie d’ange, Montreal, Canada Variations on a Landscape, The Power Plant Contemporary Art Gallery, Toronto, Canada recently, The Third Line, Dubai, UAE 2017 Museum Villa Stuck, Munich, Germany variations on a garden, Douglas Hyde Gallery, Dublin, Ireland They hit a tree with an axe, SALT Galata, Istanbul, Turkey variations on a garden, DRAF Studio, David Roberts Art Foundation, London, UK 2016 Neighbours, with Marina Roy, Dunlop Art Gallery, Regina, Canada Singing Softly When No One’s Around, Art Gallery of Ontario, Toronto, Canada KIDS CATS AND 1 DOG, FLORA ars+natura, Bogotá, Colombia 2015 variations on a garden, Mercer Union, Toronto, Canada Study for a Curtain, The Third Line, Dubai, United Arab Emirates Artspeak, Vancouver, Canada 2013 Study for a Glasshouse, Peel Art Gallery, Brampton, Canada Galeri Manâ, Istanbul, Turkey green house, Western Front, Vancouver, Canada 2012 Study for a Garden, Delfina Foundation, London, UK Fire/Fire, with Marina Roy, Centre A -
Uaac-Aauc Conference 2014
UAAC-AAUC CONFERENCE 2014 October 23 to October 26 OCAD University www.uaac-aauc.com Toronto, Canada 1 Bienvenue au congrès! Au nom du conseil d’administration de l’Association d’art des universités du Canada, je souhaite la bienvenue à tous les participants au congrès 2014 de Toronto. C’est toujours un plaisir pour l’Association de venir à Toronto, mais cette année, nous sommes particulièrement heureux d’être accueillis par l’Université OCAD, un établissement jouissant d’une longue et brillante feuille de route en ce qui a trait à la production de certains des plus importants artistes du Canada. J’aimerais remercier l’Université OCAD et sa présidente, Sara Diamond, pour le parrainage de cette conférence. Des remerciements particuliers vont aux coprésidents du comité d’organisation sur place, Charles Reeve et Caroline Langill, ainsi qu’aux membres de leur équipe, Claudette Lauzon, Keith Bresnahan, Anda Kubis, Adam Tindale, Audrey Hudson, Jessica Wyman, Laragh Halldorson et Sarah McLean Knapp. Le programme du congrès de cette année s’annonce très excitant—et rempli! Nous essayons une nouveauté cette année, une journée supplémentaire dédiée au perfectionnement professionnel et à des séances pédagogiques. En tant qu’Association d’art des universités du Canada, nous avons une responsabilité particulière à l’égard du perfectionnement professionnel de nos étudiants aux cycles supérieurs. Comme les emplois traditionnels en enseignement et dans les musées se raréfient, il nous faut aider nos étudiants à trouver des carrières intéressantes, tant au sein des universités qu’à l’extérieur de celles-ci. Je vous encourage à venir écouter notre conférencière Jennifer Polk, du site From PhD to Life, parler de ces possibilités dimanche matin à 9 h 30, et à participer aux tables rondes sur le perfectionnement professionnel et pédagogique qui suivront. -
Mystic Mountain © Mendip Hills AONB
Viewpoint Mystic mountain © Mendip Hills AONB Time: 15 mins Region: South West England Landscape: rural Location: Ebbor Gorge, Somerset, BA5 3BA Grid reference: ST 52649 48742 Getting there: Park at Deer Leap car park and picnic area (on the road between Wookey Hole and Priddy) Keep an eye out for: Buzzards and other birds of prey soaring on the thermals below From this stunning vantage point we have sweeping views south across the flat land of the Somerset Levels. On a clear day, looking east you can see the dark line of hills marking out Exmoor National Park and if you look in a west south-west direction you can even spot the Bristol Channel glistening in the distance. As our eyes pan across the view they rest on a perfectly rounded knoll with a short tower on top. This is Glastonbury Tor. Claimed as the site of the legendary Vale of Avalon and the final resting place of King Arthur, the tor rises up above the flat land surrounding it and is visible for miles around. Why does the mystical Glastonbury Tor rise up out of the surrounding lowlands? First of all look straight ahead and in the middle distance you’ll see three hills which punctuate the flat landscape. From left to right they are Hay Hill, Ben Knowle Hill and Yarley Hill, part of a low ridge just south of the River Axe. Surrounding these hills the Somerset Levels are an area of low-lying farmland. The lowest point is just 0.2 metres above sea level. -
The Min Min Light and the Fata Morgana Pettigrew
C L I N I C A L A N D E X P E R I M E N T A L OPTOMETRYThe Min Min light and the Fata Morgana Pettigrew COMMENTARY The Min Min light and the Fata Morgana An optical account of a mysterious Australian phenomenon Clin Exp Optom 2003; 86: 2: 109–120 John D Pettigrew BSc(Med) MSc MBBS Background: Despite intense interest in this mysterious Australian phenomenon, the FRS Min Min light has never been explained in a satisfactory way. Vision Touch and Hearing Research Methods and Results: An optical explanation of the Min Min light phenomenon is of- Centre, University of Queensland fered, based on a number of direct observations of the phenomenon, as well as a field demonstration, in the Channel Country of Western Queensland. This explanation is based on the inverted mirage or Fata Morgana, where light is refracted long distances over the horizon by the refractive index gradient that occurs in the layers of air during a temperature inversion. Both natural and man-made light sources can be involved, with the isolated light source making it difficult to recognise the features of the Fata Morgana that are obvious in daylight and with its unsuspected great distance contribut- ing to the mystery of its origins. Submitted: 11 September 2002 Conclusion: Many of the strange properties of the Min Min light are explicable in terms Revised: 2 December 2002 of the unusual optical conditions of the Fata Morgana, if account is also taken of the Accepted for publication: 3 December human factors that operate under these highly-reduced stimulus conditions involving a 2002 single isolated light source without reference landmarks. -
Beyond-Line-Of-Sight Communications with Ducting Layer Ergin Dinc, Student Member, IEEE, Ozgur B
IEEE COMMUNICATIONS MAGAZINE 1 Beyond-Line-of-Sight Communications with Ducting Layer Ergin Dinc, Student Member, IEEE, Ozgur B. Akan, Senior Member, IEEE Abstract—Near-surface wave propagation at microwave fre- 8 :JR:`R IQ ].V`V quencies especially 2 GHz and above shows significant depen- dence on atmospheric ducts that are the layer in which rapid decrease in the refractive index occurs. The propagating signals in the atmospheric ducts are trapped between the ducting layer and the sea surface, so that the power of the propagating signals do not spread isotropically through the atmosphere. As a result, these signals have low path-loss and can travel over-the-horizon. V: Since atmospheric ducts are nearly permanent at maritime and coastal environments, ducting layer communication is a promis- 8 IQ ].V`1H%H ing method for beyond-Line-of-Sight (b-LoS) communications especially in naval communications. To this end, we overview %H 1J$:7V` the characteristics and the channel modeling approaches for the ducting layer communications by outlining possible open research areas. In addition, we review the possible utilization of the ducting layer in Network Centric Operations (NCO) to empower decision making for the b-LoS operations. V: Index Terms—Atmospheric ducts, ducting layer, refractivity, beyond-line-of-sight communications Fig. 1. Signal spreading in the standard atmosphere and the atmospheric duct. I. INTRODUCTION TMOSPHERIC ducts that are caused by rapid decrease Ducting layer studies mainly focus on refractivity estimation A in the refractive index of the lower atmosphere have techniques and radar path-loss calculations [1], [2]. However, tremendous effects on the near-surface wave propagation. -
The Antarctic Sun, December 17, 2006
December 17, 2006 New fi nds in Dry Valleys indicate ancient tundra By Peter Rejcek Sun staff Flannel shirts and jeans – or perhaps a light fleece – may have been the norm in the McMurdo Dry Valleys of Antarctica about 14 mil- lion years ago. Fossil records and glacial history in an area of the western Olympus Range near Mount Boreas indi- cate that during the middle of the Miocene epoch (about 14 million years ago) climatic conditions were warm and wet enough to support plant and insect life, according to a team of scientists that returned this season to continue its research. The story began when Adam Lewis, a post-doctoral fellow at The Antarctic The Sun Byrd Polar Research Center at The Ohio State University, traversed a roughly 100-square-kilometer Allan Ashworth picks through a pile of area of the Olympus Range sev- Peter Rejcek / eral years ago while working on shale looking for fossils and other his doctorate. His thesis involved fleshing out the glacial history evidence of a tundra environment that he and of eight valleys between various mountain peaks. others believe disappeared in the McMurdo Dry “In the process of doing that, I discovered these lake deposits,” Valleys about 14 million years ago. explained Lewis shortly before he headed into the field via helicop- See related story on page 8 See CLIMATE on page 9 Blowin’ in the Wind Quote of the Week USAP looks to harness alternative energy for McMurdo, South Pole “So, are you originally from By Steve Martaindale Programs for the National Science Foundation. -
The Fata Morgana. by Professor FA Forel, Morges
1911-12.] The Fata Morgana. 175 XV.—The Fata Morgana. By Professor F. A. Forel, Morges, Switzerland. Abstract of an Address delivered before the Society on July II,., 1911; translated by Professor C. G. Knott. AMONG optical phenomena which originate over the surface of water there is one so ill-defined and ill-observed as to be still mysterious; till now it has received no valid explanation. The Italians call it the Fata Morgana. Under conditions still lacking precise description, there appear on the far side of the Straits of Messina certain fantastic visions, fortresses and castles of unknown cities, which seem to emerge from the sea, soon to vanish again. These are the "palaces" of the "fairy Morgana," which appear and dis- appear at the capricious stroke of the magician's wand. Most of the accounts of the phenomenon are founded on the extravagant description and the amazing picture published in 1773 by the Dominican friar Don Antonio Minasi, professor of botany at the Roman College of Sapienzia. This drawing, with its incoherent groupings of castles and boats, reflected and refracted at random in a manner quite inconsistent with physical possibilities, was largely the creation of the distorted imagination of an artist who did not understand in the least the wonderful illusion. To appreciate the confusion which reigns in the scientific world in regard to this phenomenon, the reader need only refer to the chapter on the Fata Morgana in Pernter's admirable work on Meteorological Optics (Vienna, 1910). There he will be impressed with the uncertainty of the conclusions reached by the author after a study of the insufficient and contradictory documents to which he had access. -
International Geophysical Year Records Group Series 10
International Geophysical Year Records Group Series 10: CSAGI International. Series contains records of CSAGI conferences, assemblies, missions, and national reports. Includes files for individual countries participating in IGY. 10.1 PARTICIPATING COUNTRIES CSAGI: Participating Countries: Index: 1959 CSAGI: Participating Countries: Lists: 1954-1958 CSAGI: Participating Countries: General: 1954-1958 CSAGI: Participating Countries: Membership of IGY Participating Committees: 31 Oct 1957 CSAGI: Participating Countries: Cooperative Programs: 1956-1957 CSAGI: Participating Countries: Afghanistan: 1958 CSAGI: Participating Countries: Argentina: General Correspondence: 1955-1956 CSAGI: Participating Countries: Argentina: General Correspondence: 1957-1958 CSAGI: Participating Countries: Argentina: General Correspondence: 1958-1959 CSAGI: Participating Countries: Argentina: Antarctic: 1955-1959 CSAGI: Participating Countries: Argentina: Earth Satellite: 1957-1958 CSAGI: Participating Countries: Australia: 1956-1959 CSAGI: Participating Countries: Australia: Antarctic: 1955-1960 CSAGI: Participating Countries: Australia: Earth Satellite: 1956-1958 CSAGI: Participating Countries: Austria: 1955-1958 CSAGI: Participating Countries: Belgium: 1955-1960 CSAGI: Participating Countries: Bolivia: 1955-1959 CSAGI: Participating Countries: Brazil: Earth Satellite: 1956-1958 CSAGI: Participating Countries: Brazil: Equipment: 1956-1958 CSAGI: Participating Countries: Brazil: General: 1955-1959 CSAGI: Participating Countries: Bulgaria: 1956-1957 CSAGI: Participating -
Spheric Duct Interference in TD-LTE Networks
Journal of Communications and Information Networks, Vol.2, No.1, Mar. 2017 DOI: 10.1007/s41650-017-0006-x Research paper c Posts & Telecom Press and Springer Singapore 2017 Special Issue on Wireless Big Data Analysis and prediction of 100 km-scale atmo- spheric duct interference in TD-LTE networks Ting Zhou1,3, Tianyu Sun1,2,3, Honglin Hu3*, Hui Xu1,3, Yang Yang1,3, Ilkka Harjula4, Yevgeni Koucheryavy5 1. Key Lab of Wireless Sensor Network and Communication, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 201800, China 2. School of Information Science and Technology, ShanghaiTech University, Shanghai 201204, China 3. Shanghai Research Center for Wireless Communication, Shanghai 201204, China 4. VTT Technical Research Centre of Finland, VTT FI-02044, Finland 5. Tampere University of Technology, Korkeakoulunkatu 10, Tampere FI-33720, Finland * Corresponding author, email: [email protected] Abstract: Atmospheric ducts are horizontal layers that occur under certain weather conditions in the lower atmosphere. Radio signals guided in atmospheric ducts tend to experience less attenuation and spread much farther, i.e, hundreds of kilometers. In a large-scale deployed TD-LTE (Time Division Long Term Evolution) network, atmospheric ducts cause faraway downlink wireless signals to propagate beyond the designed protection distance and interfere with local uplink signals, thus resulting in a large outage probability. In this paper, we analyze the characteristics of ADI atmospheric duct interference (Atmospheric Duct Interference) by the use of real network-side big data from the current operated TD-LTE network owned by China Mobile. The analysis results yield the time varying and directional characteristics of ADI. -
Ducting and Turbulence Effects on Radio-Wave Propagation in An
Progress In Electromagnetics Research B, Vol. 60, 301–315, 2014 Ducting and Turbulence Effects on Radio-Wave Propagation in an Atmospheric Boundary Layer Yung-Hsiang Chou and Jean-Fu Kiang* Abstract—The split-step Fourier (SSF) algorithm is applied to simulate the propagation of radio waves in an atmospheric duct. The refractive-index fluctuation in the ducts is assumed to follow a two- dimensional Kolmogorov power spectrum, which is derived from its three-dimensional counterpart via the Wiener-Khinchin theorem. The measured profiles of temperature, humidity and wind speed in the Gulf area on April 28, 1996, are used to derive the average refractive index and the scaling parameters in order to estimate the outer scale and the structure constant of turbulence in the atmospheric boundary layer (ABL). Simulation results show significant turbulence effects above sea in daytime, under stable conditions, which are attributed to the presence of atmospheric ducts. Weak turbulence effects are observed over lands in daytime, under unstable conditions, in which the high surface temperature prevents the formation of ducts. 1. INTRODUCTION There are three basic types of atmospheric duct: Surface duct, surface-based duct and elevated duct. A surface duct is usually caused by a temperature inversion [1]. An evaporation duct is a special case of surface duct, which appears over water bodies accompanied by a rapid decrease of humidity with altitude [2]. Surface-based ducts are formed when the upper air is exceptionally warm and dry compared with that on the surface [2]. Elevated ducts usually appear in the trade-wind regions between the mid-ocean high-pressure cells and the equator [2]. -
Michael Z. Vinokouroff: a Profile and Inventory of His Papers And
MICHAEL Z. VINOKOUROFF: A PROFILE AND INVENTORY OF HIS PAPERS (Ms 81) AND PHOTOGRAPHS (PCA 243) in the Alaska Historical Library Louise Martin, Ph.D. Project coordinator and editor Alaska Department of Education Division ofState Libraries P.O. Box G Juneau Alaska 99811 1986 Martin, Louise. Michael Z. Vinokouroff: a profile and inventory of his papers (MS 81) and photographs (PCA 243) in the Alaska Historical Library / Louise Martin, Ph.D., project coordinator and editor. -- Juneau, Alaska (P.O. Box G. Juneau 99811): Alaska Department of Education, Division of State Libraries, 1986. 137, 26 p. : ill.; 28 cm. Includes index and references to photographs, church and Siberian material available on microfiche from the publisher. Partial contents: M.Z. Vinokouroff: profile of a Russian emigre scholar and bibliophile/ Richard A. Pierce -- It must be done / M.Z.., Vinokouroff; trans- lation by Richard A. Pierce. 1. Orthodox Eastern Church, Russian. 2. Siberia (R.S.F.S.R.) 3. Russian Orthodox Greek Catholic Church of America--Diocese of Alaska--Archives-- Catalogs. 4. Vinokour6ff, Michael Z., 1894-1983-- Library--Catalogs. 5. Soviet Union--Emigrationand immigration. 6. Authors, Russian--20th Century. 7. Alaska Historical Library-- Catalogs. I. Alaska. Division of State Libraries. II. Pierce, Richard A. M.Z. Vinokouroff: profile of a Russian emigre scholar and bibliophile. III. Vinokouroff, Michael Z., 1894- 1983. It must be done. IV. Title. DK246 .M37 Table of Contents Introduction ............................................. 1 “M.Z. Vinokouroff: Profile of a Russian Émigré Scholar and Bibliophile,” by Richard A. Pierce................... 5 Appendix: “IT MUST BE DONE!” by M.Z. Vinokouroff; translation by Richard A.