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A Multidisciplinary Investigation of the Intermediate Depths of the Atlantic Ocean: AAIW delta^13C Variability During the Younger Dryas and Lithoherms in the Straits of FloridaBrookshire, Brian 2010 December 1900 (has links)
A transect of cores ranging from 798 m to 1585 m water depth in the South Atlantic
Ocean document the relative intermediate water mass nutrient geometry and stable
isotopic variability of AAIW during the Younger Dryas cooling event. The data reveal
concurrent delta^13 C and delta^18 O excursions of 0.59 ppt and 0.37 ppt within the core of
Antarctic Intermediate Water (AAIW) centered at 11,381 calendar years before present
based on radiometric age control. A portion of the delta^1 3C variability (0.22 ppt) can be
explained by a shift in thermodynamic equilibrium concurrent with a drop in
temperature of 1.8°C at the locus of AAIW formation. The remaining 0.37 ppt increase
in delta^13 C most likely resulted from increased wind velocities, and a greater coupling
between the ocean and the atmosphere at the locus of AAIW formation (increased
efficiency of the thermodynamic process).
Deepwater coral mounds are aggregates of corals, other organisms, their skeletal
remains, and sediments that occur on the seafloor of the world’s oceans. In the Straits of
Florida, these features have been referred to as lithoherms. We use digital, side-scan sonar data collected from the submarine NR-1 from an 10.9 km^2 area at ~650 m water
depth to characterize quantitatively aspects of the morphology of 216. Their lengths,
widths, heights, areas, orientations and concentration on the seafloor have been
determined. Analysis indicates that the outlines of relatively small to medium sized
lithoherms can be effectively described with a piriform function. This shape is less
applicable to the largest lithoherms because they are aggregates of smaller lithoherms.
Nearly all of the lithoherms studied have axes parallel to the northward flowing Florida
Current, and the heads of 80 percent of these features face into the current. The shape and
orientation of the lithoherms, and evidence of megaripples and scouring in the sonar data
suggest that these features are formed by a unidirectional current.
Following an extensive investigation of over 200 lithoherms via side-scan sonar
imagery and direct observation, we have developed a qualitative model for the formation
of the lithoherm type of deep-water coral mounds in the Straits of Florida. Lithoherm
formation can be characterized by four main stages of development: nucleating, juvenile,
mature singular, and fused. Fused lithoherms can form via transverse and/or
longitudinal accretion, however, transverse accretion at the head of the mound is likely
the most efficient mechanism. A comparison of lithoherm spatial relationship to local
bathymetry agrees with previous observations of deep-water coral mound formations
along the levied margins of density flow scour channels.
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Formalising stress in SenćotenLeonard, Janet 25 January 2010 (has links)
The purpose of this thesis is to contribute to our understanding of how stress is
assigned in SENCOTEN (a dialect of North Straits Salish). The stress system of the Salish languages has been traditionally thought of as being highly morpho-lexical.
Montler (1986: 23) states that in SENCOTEN, roots and affixes are lexically specified for their stress properties. He claims that these roots and affixes are in a hierarchical relationship and compete with each other for stress assignment. However, in this thesis, I show that there is much less morpho-lexical stress in SENCOTEN than previously thought. The stress pattern of a high number of polymorphemic words, namely those that contain lexical suffixes, can be accounted for without resorting to a morphological hierarchy of stress. Instead, using an Optimality Theory analysis inspired by the work of Dyck (2004) and Kiyota (2003), I show that it is the weight distinction between full vowels and schwa that determines where stress will be assigned. In addition, I am able to show that metrical feet are grouped into trochees and that these trochaic feet are aligned to the right edge of the word.
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Senćoten resultive constructionTurner, Claire Kelly 11 February 2010 (has links)
The resultive and actual (imperfective) aspects in SENCOTEN, a dialect of North Straits Salish, have been previously considered to contain two separate actual and resultive morphemes (Montler 1986). In contrast, it is argued here that the SENOTEN resultive construction is a complex construction, built on an actual base by prefixation of stative [s-]. Both morphophonological evidence and morphosyntactic evidence for this claim are considered: resultives and actuals exhibit the same non-concatenative allomorphy, and they appear to be in complementary distribution with respect to argument structure. This thesis also considers the semantic aspectual properties of resultives, and suggests that the morphologically complex resultive is semantically compositional: it contains a [durative] feature contributed by the actual morpheme and a [static] feature contributed by the stative prefix.
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Environmental Controls on Cold-Water Coral Mound Distribution, Morphology, and Development in the Straits of FloridaSimoes Correa, Thiago Barreto 05 February 2012 (has links)
Scleractinian cold-water corals are widely distributed in seaways and basins of the North Atlantic Ocean, including the Straits of Florida. These corals can form extensive biogenic mounds, which are biodiversity hotspots in the deep ocean. The processes that lead to the genesis of such cold-water coral mounds and control their distribution and morphology are poorly understood. This work uses an innovative mapping approach that combines 130 km2 of high resolution geophysical and oceanographic data collected using an Autonomous Underwater Vehicle (AUV) from five cold-water coral habitats in the Straits of Florida. These AUV data, together with ground-truthing observations from eleven submersible dives, are used to investigate fine-scale mound parameters and their relationships with environmental factors. Based on these datasets, automated methods are developed for extracting and analyzing mound morphometrics and coral cover. These analyses reveal that mound density is 14 mound/km2 for the three surveyed sites on the toe-of-slope of Great Bahama Bank (GBB); this density is higher than previously documented (0.3 mound/km2) in nearby mound fields. Morphometric analyses further indicate that mounds vary significantly in size, from a meter to up to 110 m in relief, and 81 to 600,000 m2 in footprint area. In addition to individual mounds, cold-water corals also develop in some areas as elongated low-relief ridges that are up to 25 m high and 2000 m long. These ridges cover approximately 60 and 70% of the mapped seafloor from the sites at the center of the Straits and at the base of the Miami Terrace, respectively. Morphometrics and current data analyses across the five surveyed fields indicate that mounds and ridges are not in alignment with the dominant current directions. These findings contradict previous studies that described streamlined mounds parallel to the northward Florida Current. In contrast, this study shows that the sites dominated by coral ridges are influenced by unidirectional flowing current, whereas the mounds on the GBB slope are influenced by tidal current regime. The GBB mounds also experience higher sedimentation rates relative to the sites away from the GBB slope. Sub-surface data document partially or completely buried mounds on the GBB sites. The sediments burying mounds are off-bank material transported downslope by mass gravity flow. Mass gravity transport creates complex slope architecture on the toe-of-slope of GBB, with canyons, slump scars, and gravity flow deposits. Cold-water corals use all three of these features as location for colonization. Coral mounds growing on such pre-existing topography keep up with off-bank sedimentation. In contrast, away from the GBB slope, off-bank sedimentation is absent and coral ridges grow independently of antecedent topography. In the sediment-starved Miami Terrace site, coral ridge initiation is related to a cemented mid-Miocene unconformity. In the center of the Straits, coral ridges and knobs develop over an unconsolidated sand sheet at the tail of the Pourtales drift. Coral features at the Miami Terrace and center of the Straits have intricate morphologies, including waveform and chevron-like ridges, which result from asymmetrical coral growth. Dense coral frameworks and living coral colonies grow preferentially on the current-facing ridge sides in order to optimize food particle capture, whereas coral rubble and mud-sized sediments accumulate in the ridge leesides. Finally, this study provides a method using solely acoustic data for discriminating habitats in which cold-water corals are actively growing. Results from this method can guide future research on and management of cold-water coral ecosystems. Taken together, spatial quantitative analyses of the large-scale, high-resolution integrated surveys indicate that cold-water coral habitats in the Straits of Florida: (1) are significantly more diverse and abundant than previously thought, and (2) can be influenced in their distribution and development by current regime, sedimentation, and/or antecedent topography.
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A human history of Tl’chés, 1860-1973Forest-Hammond, Elise Gabrielle 04 May 2020 (has links)
This thesis represents a human history of Tl’chés (Discovery and Chatham Islands) roughly between the mid-19th and mid-20th centuries. It presents Songhees and Settler life on the archipelago, as well as the dispossession of Songhees lands. Detailing processes of colonialism, as well as Songhees resistance to it, this thesis represents a microcosm of colonialism as it unfolded in the lands now called British Columbia. / Graduate
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China and Central Asia's Transnational Concerns Require Multilateral SolutionsTobin, Blake 01 December 2014 (has links)
After seven decades of regional domination, the sudden collapse of the Soviet Union in 1991 put the whole continent in a state of political and economic uncertainty. The sudden absence of a strong, yet generally predictable hegemon initiated an intense debate centered on whether or not the rise of China posed a grave threat to the region or whether it would bring stability and cohesion to the region. After 23 years of observation, it is now safe to presume that China does not pose a military threat to the region. Simply because China does not have expansionist or aggressive political or economic aims does not mean that there should be no cause for concern. China does possess persistent political, economic, and security concerns that, despite the nation's best efforts, has not been able to solve. Domestically, examples of these concerns are illegal smuggling, weapons and human trafficking, illegal narcotics, organized crime, Islamic fundamentalism, ethnic nationalism, and Islamic militancy. Internationally, China has had a hard time, not only dealing with the aforementioned list, but also with piracy, ethnic unrest, anti-Chinese sentiment, corruption, and illegal port activities. The reason the solution to these problems remains elusive is the fact that they all share a common element. The element is that they are all transnational in nature; the events themselves, not fully encapsulated within the borders of just one nation-state. This makes them extremely difficult for a single nation-state to be able to effectively deal with them. It happens that Central Asian nations and littoral nations of Malaysia, Indonesia, and Singapore are also afflicted with many of the same issues. This fact is why it will take a comprehensive and coordinated effort in order to effectively deal with the underlying causes which contribute to these problems before any noticeable effect will take place. These efforts, or transnational solutions, are the most effective way to deal with transnational concerns. Research, observations, and the case studies demonstrate that many of the most pressing transnational concerns have similar underlying factors. Income inequality, government repression, and lack of economic opportunity are a few of the most prevalent factors. The obstacles these factors cause are not insurmountable. However each one of these problems require a concentrated and coordinated effort and the cooperation of multiple nation-states. International Organizations, such as the Shanghai Cooperation Organization, are effective mediums in which to accomplish this. What is repeatedly observed is that transnational problems are best solved using transnational solutions.
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GEOCHEMICAL AND STRATIGRAPHIC ANALYSIS OF META-SEDIMENTARY ROCKS OF THE GNEISS DOME BELT, WESTERN CONNECTICUT AND MASSACHUSETTSRoberts, Todd M. 11 October 2001 (has links)
No description available.
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A phonetic investigation of vowel variation in LekwungenNolan, Tess 04 May 2017 (has links)
This thesis conducted the first acoustic analysis on Lekwungen (aka Songhees, Songish) (Central Salish). It studied the acoustic correlates of stress on vowels and the effects of consonantal coarticulatory effects on vowel quality. The goals of the thesis were to provide useful and usable materials and information to Lekwungen language revitalisation efforts and to provide an acoustic study of Lekwungen vowels to expand knowledge of Salishan languages and linguistics.
Duration, mean pitch, and mean amplitude were measured on vowels in various stress environments. Findings showed that there is a three-way contrast between vowels in terms of duration and only a two-way contrast in terms of pitch and amplitude.
F1, F2, and F3 were measured at vowel onset (5%), midpoint (50%), and offset (95%), as well as a mean (5%-95%), in CVC sequences for four vowels: /i/, /e/, /a/, and /ə/. Out of five places of articulation of consonants in Lekwungen (alveolar, palatal, labio-velar, uvular, glottal), uvular and glottal had the most persistent effects on F1, F2, and F3 of all vowels. Of the vowels, unstressed /ə/ was the most persistently affected by all consonants. Several effects on perception were also preliminarily documented, but future work is needed to see how persistence in acoustic effects is correlated with perception.
This thesis provides information and useful tips to help learners and teachers in writing and perceiving Lekwungen and for learners learning Lekwungen pronunciation, as a part of language revitalisation efforts. It also contributes to the growing body of acoustic phonetic work on Salishan languages, especially on vowels. / Graduate / 0290
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A hydrokinetic resource assessment of the Florida CurrentUnknown Date (has links)
The Straits of Florida has been noted as a potential location for extraction of the kydrokinetic energy of the Florida Current, in view of the strength of the current and its proximity to the shore. ... This research explores the Florida Current as a potential renewable energy source. By utilizing historical data, in situ observations of the Florida Current, and computer model data, the hydrokinetic resource of the Florida Current is characterized both spatially and temporally. Subsequently, based on the geographic variability of the hydrokinetic power and other factors that impact the economy of a hydrokinetic turbine array installation, the ideal locations for turbine array installation within the Florida Current are identified.... Additionally, an interactive tool has been developed in which array parameters are input - including installation location, turbine diameter, turbine cut-in speed, etc. - and array extraction estimates, ideal installation position, and water depth at the installation points are output. As ocean model data is prominently used in this research, a discussion about the limitations of the ocean model data and a method for overcoming these limitations are described. Globally, the distribution of hydrokinetic power intensity is evaluated to identify other currents that have a high hydrokinetic resource. / by Alana E. Smentek-Duerr. / Thesis (Ph.D.)--Florida Atlantic University, 2012. / Includes bibliography. / Mode of access: World Wide Web. / System requirements: Adobe Reader.
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Speak Good English Movement in Singapore : Reactions in Social and Traditional MediaSuhonen, Lari-Valtteri January 2011 (has links)
The first Speak Good English Movement, SGEM, took place in 2000, and has been organized annually ever since. Speaking a “standard” form of English is considered to bring increased personal power. However, the SGEM wants the Singaporeans to use “standard” English in their private life as well. A decade after the beginning of the campaign, a Speak Good Singlish Movement was started. Based on studies of language and identity, it is understandable why some Singaporeans might feel the SGEM threatens their identity. However, the reactions towards the campaign are mainly positive. For the purposes of this analysis, Twitter messages, Facebook pages, and newspaper articles from The Straits Times were collected. The SGEM has hailed both direct and indirect praise and criticism in both social and traditional media: Five newspaper articles praise the campaign while five criticize it; the results are nine and seven respectively for social media. This thesis looks at reactions towards the SGEM in both social and traditional media, analyzes how these reactions might relate to the ideas of the power of language, its variety and the relation of language and identity.
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