Approved for public release; distribution unlimited / In conjunction with the Huntington Beach Phase III Investigation, the diurnal variability in the wind and ocean currents from July 1 - October 12, 2001 over the San Pedro Shelf is investigated. Results suggest that the diurnal currents are driven by the diurnal winds but that the strength of the ocean response is modulated by the low frequency flow regime. The spectral peak of the near-surface currents is at the diurnal frequency, which is below the inertial frequency (1.107 cpd). The diurnal currents are surface-intensified, decaying with depth to a minimum at 10-13 m and increasing slightly in strength below that. The near-surface diurnal currents are in phase across the shelf, and are close to in phase with the winds over the shelf. The amplitude modulation of the diurnal energy of the ocean currents is correlated with the direction of the low frequency flow along the shelf;the energy is enhanced when the flow is equatorward, and weak when the flow is poleward. The amplitudes of the diurnal near-surface currents are also correlated with the diurnal winds. However, the low frequency currents and winds are not well correlated. / Lieutenant, United States Navy

To clarify the spatiotemporal distribution of the winter and spring larval fish assemblage in the coastal waters off Kaohsiung and Pingtung, Taiwan, larval fishes were collected during four research cruises by conducting 35 tows of the larval net in coastal waters off Zuoying, Linyuan, Linban and Fangliao in January and March 2009 and in coastal waters off Linyuan adjacent to the Kaoping River estuary in January and March 2010. Water temperature, salinity and dissolved oxygen were measured during the sampling of the fish larvae. Seawater samples were also collected for analyzing concentrations of nutrient salts. In 2009, a total of 2,023 fish larvae, representing 38 families and 74 species, were collected. The fish larvae assemblage exhibited seasonal variation in both abundance and species composition. The abundance (460 ind./1000m3) and the number of species (34 families and 66 species) of the fish larvae collected in March were higher than those (28 ind./1000m3, 14 families and 27 species) collected in January. Fish larvae also exhibited spatial variation in species composition. In January, the most dominant families of fish larvae were: Myctophidae off Linyuan, Sparidae off Linban and Nomeidae off Fangliao. In March, in the northward coastal waters off Linyuan Scombridae was the most dominant family, and in the southward coastal waters off Linyuan, Clupeidae and Sillaginidae were the dominant families. No significant differences existed in the abundance of fish larvae among the sampling areas, but the abundance of fish larvae in the sampling sites off Linyuan and Linban tended to be strongly influenced by tide. In 2010, a total of 1,959 fish larvae, representing 39 families and 59 species, were collected. These fish larvae showed diurnal and seasonal variations in abundance and in species composition. The abundance (767 ind./1000m3) and the number of species (39 families and 55 species) of the fish larvae in March were higher compared with those (26 ind./1000m3, 16 families and 25 species) in January. Moreover, the abundance of fish larvae in the nighttime was higher than that in the daytime. In March, the most dominant family in the daytime was Serranidae, whereas the most dominant family in the nighttime was Myctophidae, indicating the diurnal migration of Myctophidae these larvae. Cluster analysis indicated that the abundance and species composition of the fish larvae differed between January and March in 2009. The difference in species composition among the four sampling areas was only found significant for the fish larvae collected in the coastal waters off Fangliao in winter, and the most influenced families were Nomeidae and Myctophidae. In 2010, seasonal variations were found in the abundance and species composition of the fish larvae, and the abundance of the fish larvae showed the difference between nearshore and inshore sampling sites in the nighttime in winter. In spring, the fish larvae were all inshore fishes, but the species composition had annual variation. The temperature and salinity data obtained in the sampling sites conformed to the surface seawater of South China Sea, indicating that the occurrence of the dominant family Scombridae may be related to the seawater of South China Sea.

No description available.

The fine-scale structure of global (30N-30S) tropical rainfall is characterised using 13 years (1998-2010) of 3-hourly and daily, 0.25-degree Tropical Rainfall Measuring Mission (TRMM) 3B42 rainfall product. At the outset, the dominant timescales present in rainfall are identified. Specifically, the Fourier spectrum (in time) is estimated in two ways (a) spectrum of spatially averaged (SoSA) rainfall; and (b) spatial average of the spectrum (SAoS) of rainfall at each grid point. This procedure is applied on rainfall at the 3-hourly and daily temporal resolutions. Both estimates of the spectrum show the presence of a very strong seasonal cycle. But, at subseasonal timescales, the two methods of estimating spectrum show a marked difference in daily rainfall. Specifically, with SoSA the variability peaks at a subseasonal timescale of around 5 days, with a possible secondary peak around 30-40 days (mostly in the southern tropics). With SAoS, the variability is distributed across a range of timescales, from 2 days to 90 days. However, with finer resolution (3-hourly) observations, it is seen that (besides the seasonal cycle) both methods agree and yield a dominant diurnal scale. Along with other subseasonal scales, the contribution and geographical distribution of diurnal scale variability is estimated and shown to be highly significant. Given its large contribution to the variability of tropical rainfall, the diurnal cycle is extracted by means of a Fourier-based filtering and analysed. The diurnal rainfall anomaly is constructed by eliminating all timescales larger than 1 day. Following this, taking care to avoid spurious peaks associated with Gibbs oscillations, the time of day (called the peak octet) when the diurnal anomaly is largest is identified. The peak octet is estimated for each location in the global tropics. This is repeated for 13 years, and the resulting mode of the time of maximum rainfall is established. It is seen that (i) most land regions receive rainfall during the late afternoon/early evening hours; (ii) rainfall over open oceans lack a dominant diurnal signature with a possible combination of early morning and afternoon showers; (iii) coastal regions show a clear south/southwest propagation in the mode of the peak octet of rainfall. In addition to being a comprehensive documentation of the diurnal cycle at very fine scales, the results serve as a critical test for the validation of theoretical and numerical models of global tropical rainfall.

Four portable magnetometer stations were set up at intervals of 80 - 100 kilometers along an east-west profile running from Tofino on the west coast of Vancouver Island to Abbotsford on the mainland in order to study the spatial dependence of the coastal anomaly. These were supplemented by records from the permanent Victoria Magnetic Observatory. The Tofino-Abbotsford chain extends and partly overlaps an earlier chain of stations set up to search for geomagnetic anomalies, along an east-west profile from Lethbridge, Alberta to Vancouver, British Columbia, The coastal anomaly recorded at Tofino is observed exclusively in the vertical component, diminishing rapidly inland and reaching its maximum value when the inducing field changes in approximately an east-west direction with a frequency between one and two cycles per hour. The horizontal and vertical variations are in a ratio of two to one at the coast which is in agreement with induction ratios calculated at coastlines in Australia and California. The directional dependence and limited spatial extent of the anomaly indicate a rather shallow conductivity discontinuity, at most 100 kilometers deep, running approximately parallel to the continental shelfline. Since at the maximum response frequency the upper mantle beneath the ocean is largely shielded by the overlying wedge of sea water, the anomaly is thought to be mostly due to the conductivity contrast between the deep ocean and the continent. The diurnal geomagnetic variations which pass through the surface layers virtually unattenuated show at least a twenty five percent enhancement in the vertical component from Abbotsford to Tofino. This anomaly perhaps reflects a change in upper mantle conductivity more accurately than does the higher frequency Tofino anomaly. At a still higher frequency of three cycles per hour where the Tofino anomaly is already reduced, there is a small anomaly in the vertical component at Westham Island on the east side of Georgia Strait which is completely absent at lower frequencies. The influence of a shallow body of sea water such as Georgia Strait is expected to be small. Hence this anomaly is probably due to a conductivity structure beneath the Strait in the crust or upper mantle. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate

No description available.

Molecular nitrogen is a highly abundant element in the atmosphere; it is stable and not very reactive. Anthropogenic activities have caused greater concentrations of nitrogen-containing compounds that are highly reactive and ultimately toxic. Reactive nitrogen concentrations have become a growing concern on the South African Highveld, with satellite images indicating very high nitrogen dioxide concentrations in the region. This study investigates the nitrogen budget on the Highveld through the analysis of the nitrogen species emitted into the atmosphere on a temporal scale as well as the atmospheric conversion, transport and removal of these species. Data was collected at Elandsfontein monitoring site, which is centrally located on the industrialised Highveld. The formation and interaction of nitric oxide (NO), nitrogen dioxide (NO2), and nitrate (NO3) are a major focus in the study. NOx concentrations are higher in winter (6.5 to 8.5 μg.m-3) as a result of stable atmospheric conditions. NO3 concentrations also peak during winter (3.5 to 5.5 μg.m-3), with a distinct biomass burning peak during July and August. Diurnally, NOx concentrations indicate a tall-stack industrial source, with concentrations peaking at midday. NO3 concentrations are higher at night and lower during the day, as during the day the NO3 radical is rapidly photolysed and nitrates cannot be produced. Case studies indicate that the conversion rate of NO to NO2 is highly variable as a result of varying atmospheric factors. These rates range from 11% to 59% per hour. Rates of dry deposition of NO, NO2 and NO3 are generally higher during winter as a result of higher concentrations and increased atmospheric stability, which prevents transport out of the region. Nitrogen is predominantly deposited as NO2 throughout the year, except during spring when NO3 deposition dominates. The total amount of nitrogen deposited to the Mpumalanga Highveld region is in the range of 6.7 to 13.1 kg ha-1 yr-1, which is well below the stipulated critical load value. Such deposition therefore does not pose significant threats to the natural environment on the Highveld. Between 4% and 14% of the total emitted nitrogen on the Highveld is deposited to the surface via wet and dry deposition. The remainder stays in the atmosphere and is advected out of the region.

O bruxismo, uma desordem funcional dentária complexa e destrutiva, é representado por duas entidades que possuem diferentes patogêneses, o Bruxismo diurno ou de vigília (BD), e o Bruxismo do Sono (BS). Este estudo objetivou avaliar as características clínicas apresentadas por indivíduos bruxômanos, comparando-os a não bruxômanos. De um universo de 85 indivíduos foram formados um grupo de bruxômanos, e outro de não bruxômanos (grupo controle), utilizando um questionário de auto-relato para o diagnóstico do bruxismo. Ao exame clínico foram observaddas a ocorrência de diferentes fatores referidos na literatura. Nos resultados, após Análise de Variância com medidas repetidas (ANOVA), foi observado que entre o grupo controle e o grupo de bruxômanos, não houve diferenças estatisticamente significantes para a presença de interferência oclusal em protrusiva; lateralidade direita/esquerda; presença de guia de incisivos; presença de guia de caninos bilateral; desvio de linha média; mobilidade dental; recessão gengival; mordida aberta anterior; mordida cruzada anterior; mordida cruzada posterior unilateral; sobremordida; sobressaliência; salto condilar; clicks/estalos na ATM (nos questionários de auto-relato e no exame clínico); ruídos na ATM; limitação da abertura bucal; assimetria facial e para outros hábitos bucais (onicofagia, morder lábios, morder objetos). Entre o grupo controle e o grupo de bruxômanos, houve diferenças estatisticamente significantes para a dor musculatura face; estresse funcional dental; guia de canino unilateral; ausência de guias de caninos; presença de facetas de desgaste; fratura de dentes e/ou restaurações; presença de abfração; hipertonia do músculo masseter. No questionário de qualidade de vida, proposto pela OMS, The WHOQOL Group (1998), Oral Health Impact Profile (OHIP-14) versão simplificada em português, o cansaço foi o único quesito que apresentou diferença estatisticamente significante, no que diferenciou o grupo de bruxômanos do de não bruxômanos. / Bruxism, a functional disorder and destructive dental complex, is represented by two entities that have different pathogenesis, as the Diurnal Bruxism (DB), and Sleep Bruxism (SB). This study aimed to evaluate the clinical characteristics displayed by bruxists, comparing them to non bruxists. From a universe of 85 individuals were selected a group of bruxists, and other non bruxists (control group), using a self-report questionnaire for the diagnosis of bruxism. On clinical examination were observaddas the occurrence of different factors reported in the literature. In the results, after Analysis of Variance with repeated measures (ANOVA), was observed between the control group and the bruxists group, there were no statistically significant differences in occlusal interference in protrusive; laterality right / left; guide incisors; canines bilateral guide; midline deviation; tooth mobility; gingival recession; anterior open bite; anterior crossbite; unilateral crossbite; overbite; overjet; jump condylar; clicks / TMJ clicking (on self-report questionnaires and clinical examination); TMJ sounds; limited mouth opening; facial asymmetry and other oral habits (onychophagia, biting lips, biting objects). Between the control group and the group of bruxists, statistically significant differences were observed for pain face muscles; functional dental stress; guide unilateral canine; absence of canine guides; presence of wear facets; broken teeth and / or restorations; presence of abfraction; masseter hypertony; lingual indentations and line Alba. In quality of life questionnaire, proposed by OMS, The WHOQOL Group, 1998, Oral Health Impact Profile (OHIP-14) simplified version in Portuguese, the factor fatigue was the only that showed statistically significant difference distinguishing the bruxists group of the group of non bruxists.

O bruxismo, uma desordem funcional dentária complexa e destrutiva, é representado por duas entidades que possuem diferentes patogêneses, o Bruxismo diurno ou de vigília (BD), e o Bruxismo do Sono (BS). Este estudo objetivou avaliar as características clínicas apresentadas por indivíduos bruxômanos, comparando-os a não bruxômanos. De um universo de 85 indivíduos foram formados um grupo de bruxômanos, e outro de não bruxômanos (grupo controle), utilizando um questionário de auto-relato para o diagnóstico do bruxismo. Ao exame clínico foram observaddas a ocorrência de diferentes fatores referidos na literatura. Nos resultados, após Análise de Variância com medidas repetidas (ANOVA), foi observado que entre o grupo controle e o grupo de bruxômanos, não houve diferenças estatisticamente significantes para a presença de interferência oclusal em protrusiva; lateralidade direita/esquerda; presença de guia de incisivos; presença de guia de caninos bilateral; desvio de linha média; mobilidade dental; recessão gengival; mordida aberta anterior; mordida cruzada anterior; mordida cruzada posterior unilateral; sobremordida; sobressaliência; salto condilar; clicks/estalos na ATM (nos questionários de auto-relato e no exame clínico); ruídos na ATM; limitação da abertura bucal; assimetria facial e para outros hábitos bucais (onicofagia, morder lábios, morder objetos). Entre o grupo controle e o grupo de bruxômanos, houve diferenças estatisticamente significantes para a dor musculatura face; estresse funcional dental; guia de canino unilateral; ausência de guias de caninos; presença de facetas de desgaste; fratura de dentes e/ou restaurações; presença de abfração; hipertonia do músculo masseter. No questionário de qualidade de vida, proposto pela OMS, The WHOQOL Group (1998), Oral Health Impact Profile (OHIP-14) versão simplificada em português, o cansaço foi o único quesito que apresentou diferença estatisticamente significante, no que diferenciou o grupo de bruxômanos do de não bruxômanos. / Bruxism, a functional disorder and destructive dental complex, is represented by two entities that have different pathogenesis, as the Diurnal Bruxism (DB), and Sleep Bruxism (SB). This study aimed to evaluate the clinical characteristics displayed by bruxists, comparing them to non bruxists. From a universe of 85 individuals were selected a group of bruxists, and other non bruxists (control group), using a self-report questionnaire for the diagnosis of bruxism. On clinical examination were observaddas the occurrence of different factors reported in the literature. In the results, after Analysis of Variance with repeated measures (ANOVA), was observed between the control group and the bruxists group, there were no statistically significant differences in occlusal interference in protrusive; laterality right / left; guide incisors; canines bilateral guide; midline deviation; tooth mobility; gingival recession; anterior open bite; anterior crossbite; unilateral crossbite; overbite; overjet; jump condylar; clicks / TMJ clicking (on self-report questionnaires and clinical examination); TMJ sounds; limited mouth opening; facial asymmetry and other oral habits (onychophagia, biting lips, biting objects). Between the control group and the group of bruxists, statistically significant differences were observed for pain face muscles; functional dental stress; guide unilateral canine; absence of canine guides; presence of wear facets; broken teeth and / or restorations; presence of abfraction; masseter hypertony; lingual indentations and line Alba. In quality of life questionnaire, proposed by OMS, The WHOQOL Group, 1998, Oral Health Impact Profile (OHIP-14) simplified version in Portuguese, the factor fatigue was the only that showed statistically significant difference distinguishing the bruxists group of the group of non bruxists.

How does the brain develop differently to support nocturnality in some mammals, but diurnality in others? To answer this question, one might look to the suprachiasmatic nucleus (SCN), the pacemaker of the mammalian brain, which is required for all circadian biological and behavioral rhythms. Light arriving at the retina entrains the SCN to the daily light-dark cycle via the retinohypothalamic tract (RHT). However, in all mammals studied thus far, whether nocturnal or diurnal, the SCN exhibits a rhythm of increased activity during the day and decreased activity at night. Therefore, structures downstream of the SCN are likely to determine whether a species is nocturnal or diurnal. From an evolutionary perspective, nocturnality appears to be the primitive condition in mammals, with diurnality having reemerged independently in some lineages. However, it is unclear what mechanisms underlie the development of one or the other circadian phase preference. In adult Norway rats (Rattus norvegicus), which are nocturnal, the RHT also projects to the ventral subparaventricular zone (vSPVZ), an adjacent region that expresses an in-phase pattern of SCN-vSPVZ neuronal activity (in other words, activity in the SCN and vSPVZ increase and decrease together). In contrast, in adult Nile grass rats (Arvicanthis niloticus), a diurnal species that is closely related to Norway rats, an anti-phase pattern of SCN-vSPVZ neuronal activity is expressed (in other words, activity in the SCN increases as activity in the vSPVZ decreases, and vice versa). We hypothesized that these species differences in activity pattern result in part from a weak or absent RHT-to-vSPVZ projection in grass rats. Using a developmental comparative approach, we assessed differences in behavior, hypothalamic activity, and RHT and SCN connectivity to the vSPVZ between these two species. We report that a robust retina-to-vSPVZ projection develops in Norway rats around the end of the second postnatal week when nocturnal wakefulness and the in-phase pattern of SCN-vSPVZ activity emerge. In grass rats, however, such a projection does not develop and the emergence of the anti-phase SCN-vSPVZ activity pattern during the second postnatal week is accompanied by increased diurnal wakefulness. When considered within the context of previously published reports on RHT projections in a variety of other nocturnal and diurnal species, our current findings suggest that how and when the retina connects to the hypothalamus differentially shapes brain and behavior to produce animals that occupy opposing temporal niches.