1,711 research outputs found
Tundra and boreal forest of interior Alaska during terminal MIS 6 and MIS 5e
No full textTwo sites within the boreal forest of interiorAlaska shed light on the climate and vegetation of terminalmarine isotope stage (MIS) 6 (ca. 140–130 kyr ago) andMIS 5e (125–116 kyr ago). The Birch Creek and Koyukuklocalities are river-cut exposures with sediments datingfrom the penultimate glaciation (at least) to the present.Plant macrofossils, pollen, and beetles were analyzed atthese sites. Terminal MIS 6-aged samples indicate a coolerthan modern climate and the presence of shrub tundra.During MIS 5e, boreal forest grew at the sites and temperatureswere similar to modern times. However, theforest may also have been more mesic than today, asindicated by relatively abundant ferns. Winters may havebeen warmer than today, as suggested by beetle-basedclimatic reconstructions as well as the presence of twoextralimital taxa that today live in regions where wintertemperatures are up to 15 ?C warmer than at the sitelocalitie
Interglacial extension of the boreal forest limit in the Noatak Valley, Northwest Alaska: evidence from an exhumed river-cut bluff and debris apron
No full textNumerous exposures of Pleistocene sediments occur in the Noatak basin, which extends for 130 km along the Noatak River in northwestern Alaska. Nk-37, an extensive bluff exposure near the west end of the basin, contains a record of at least three glacial advances separated by interglacial and interstadial deposits. An ancient river-cut bluff and associated debris apron is exposed in profile through the central part of Nk-37. The debris apron contains a rich biotic record and represents part of an interglaciation that is probably assignable to marine-isotope stage 5. Pollen spectra from the lower part of the debris apron closely resemble modern samples taken from the Noatak floodplain in spruce gallery forest, and macrofossils of spruce are also present at this level. Fossil bark beetles and carpenter ants occur higher in the debris apron. Mutual Climatic Range (MCR) estimates from the fossil beetles suggest temperatures similar to or warmer than today. Together, these fossils indicate the presence of an interglacial spruce forest in the western part of the Noatak Basin, which lies about 80 km upstream of the modern limit of spruce forest
A Study of Jewish Philanthropic Company Colonization in Canada`s Northwest Territories During the Late Nineteenth Century
No full textSince the author of this study is of Mennonite ethnic origin it
is perhaps in order to explain how he came to write this study of an
aspect of Jewish History. As an undergraduate his interests lay in
modern European History and Russian Intellectual History during the late
nineteenth century. In 1975, however, his attention was drawn to a
national essay competition sponsored by the Jewish Historical Society of
Western Canada in honour of the Bronfman Family. The author was able to
complete a paper, 'Jewish Agricultural Settlement in Western Canada,
1870-1930' while doing contract research related to the development of a
travelling display for the Western Development Museum in Saskatoon
during the summer of 1976. Dr. T.D. Regehr, who supervised the research
permitted the paper to be submitted to the contest and it was awarded
second prize of $200.
Al though the paper was based on available secondary sources
only, the author had been able to ascertain that there were primary
sources available for more detailed study of aspects of Jewish
Agricultural Settlement in the West. The author's attention was drawn
to Hirsch Colony in particular because of the sharply divergent
portrayals of its history and role in the development of Jewish
agriculture in Western Canada. Jewish literature suggested that it was
at least a moderate success and that it contributed significantly to the
later improvement of Jewish agriculture's progress in the West.
Government sources often quoted in the secondary sources, however, were
generally very negative about Jewish agriculture in general and about
Hirsch Colony in particular. This intrigued the author and resulted in
this study of the Colony's role in determining the direction taken by
Jewish Agricultural Colonization in Western Canada and its influence on
Dominion Lands Policy regarding assisted settlement in general and
Jewish agriculture in particular.
This study grew out of the natural curiosity sparked by the
essay contest, the contract research, and the author's own interest in
the ethnic variety and agricultural foundations of Western Canada
Phi Delta Phi
No full textFrom the 1933 Pandora. Officers: T.D. Cook, Magister; V.B. Moore, Clerk; E.M. Smith, Reporter; J.H. Napier, Historian. Chapter Roll: S.W. Clarke, J. Earl Colvin, T. Dudley Cook, McCarthy Crenshaw, Cleburne Gregory, J. Hamilton Lokey, Frank R. Mitchell, Virlyn B. Moore, L.R. Morgan, J. Hamilton Napier, Oscar Roberts, Ernest M. Smith, Frank Swift, Joe Thomas, Lamar Tillman, Robert Twitty, T.W. Willingham, G.H. Wotte
Studies in Singular Optics and Coherence Theory
No full textIn this dissertation, the field of singular optics is examined in terms of common laboratory experiments. Different types of field singularities are related to one another. Problems in coherence theory related to two correlated sources are also investigated.Electrical EngineeringElectrical Engineering, Mathematics and Computer Scienc
Studies in Physical Optics: Coherence Theory and Surface Plasmons
No full textTelecommunicationsElectrical Engineering, Mathematics and Computer Scienc
Ages on weathered Plio-Pleistocene tephra sequences, western North Island, New Zealand
No full textUsing the zircon fission-track method, we have obtained five ages on members of two strongly-weathered silicic, Pliocene-Pleistocene tephra sequences, the Kauroa and Hamilton Ash formations, in western North Island, New Zealand. These are the first numerical ages to be obtained directly on these deposits. Of the Kauroa Ash sequence, member K1 (basal unit) was dated at 2.24 ± 0.29 Ma, confirming a previous age of c. 2.25 Ma obtained (via tephrochronology)from K/Ar ages on associated basalt lava. Members K2 and K3 gave indistinguishable ages between 1.68 ± 0.12 and 1.43 ± 0.17 Ma. Member K12, a correlative of Oparau Tephra and probably also Ongatiti Ignimbrite, was dated at 1.28 ± 0.11 Ma, consistent with an age of 1.23 ± 0.02 Ma obtained by various methods on Ongatiti Ignimbrite. Palaeomagnetic measurements indicated that members K13 to K15 (top unit, Waiterimu Ash) are aged between c. 1.2 Ma and 0.78 Ma. Possible sources of the Kauroa Ash Formation include younger volcanic centres in the southern Coromandel Volcanic Zone or older volcanic centres in the Taupo Volcanic Zone, or both. Of the Hamilton Ash sequence, the basal member Ohinewai Ash (HI) was dated at 0.38 ± 0.04 Ma. This age matches those obtained by various methods on Rangitawa Tephra of 0.34-0.35 Ma, supporting correlation with this Whakamaru-caldera derived deposit. The origin of the other Hamilton Ash beds is unknown but various younger volcanic centres in the Taupo Volcanic Zone are possible sources. The topmost member, Tikotiko Ash (H6-H7), is estimated to be aged between c. 0.18 and 0.08 Ma. Various silicic pyroclastic deposits documented in North Island and in marine cores may be co-eval with members of the Kauroa Ash and Hamilton Ash sequences on the basis of their age
Quaternary stratigraphic sections with radiocarbon dates, Killik River Quadrangle, Alaska
No full textTexas Wesleyan College waits for ball to bounce in game versus McMurry
No full textPlayers wait to see which way the basketball will bounce between Texas Wesleyan College (TWC) and McMurry. Left to right are Dick Richey(58), McMurry, Moe Dowler (99),TWC; T.D. Hamilton, McMurry; James Kile, TWC and Joe Prater (55), TWC. Rams Won 74-40https://mavmatrix.uta.edu/specialcollections_startelegram1950s/1284/thumbnail.jp
Low-income families : experiences and responses to consumer exclusion
No full textThe purpose of this paper is to focus on low-income families who are excluded from consumer culture. It explores their experiences and responses to material deprivation, social deprivation and stigmatization. Given the need for identification and calculation of exclusion thresholds to be supplemented by the voice of the excluded themselves, the study is based on qualitative analysis of 30 in-depth interviews with low-income families who encounter consumption constraints in the marketplace. While the harsh realities of consumer exclusion cannot be denied, findings also present a more positive outlook as excluded consumers can achieve empowerment through employment of stigma management strategies, creative consumer coping and rejection of the stigmatizing regime. Research is based only on families with children under the age of 18; future research on older people and exclusion would prove a useful comparison. The research raises a number of important policy issues in relation to social barriers to inclusion and the role of marketing in contributing to consumer exclusion. Social policy studies surrounding social exclusion in terms of separation from mainstream society tend to focus on employment. This paper highlights that a social exclusion discourse can also provide a useful perspective to investigate exclusion in relation to consumerism
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