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  • 2020-2024  (47)
  • 1940-1944  (20)
  • 1930-1934
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  • 11
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    Chapter 12 The power of place and perspective (2021)
    Taylor & Francis | Routledge
    Details
    Publication Date: 2023-09-12
    Description: Mobilities has become an important framework to understand and analyze contemporary social, spatial, economic and political practices. Especially as mobile media become seamlessly integrated into transportation networks, navigating urban spaces, and connecting with social networks while on the move, researchers need new approaches and methods to bring together mobilities with mobile communication and locative media. Mobile communication scholars have focused on cell phones, often ignoring broader connections to urban spaces, geography, and locational media. As a result, they emphasized virtual mobility and personalized communication as a way of disconnecting from place, location and publics. The growing pervasiveness of location-aware technology urges us to rethink the intersection among location, mobile technologies and mobility. Few studies have addressed the many transformations taking place in mobile sociality and in urban spatial processes through the appropriation of these technologies. Chapter 12 of this book is freely available as a downloadable Open Access PDF under a Creative Commons Attribution-Non Commercial-No Derivatives 3.0 license. https://s3-us-west-2.amazonaws.com/tandfbis/rt-files/docs/Open+Access+Chapters/9781138778139_oachapter12.pdf
    Keywords: Society and culture: general ; Sociology ; bic Book Industry Communication::J Society & social sciences::JF Society & culture: general ; bic Book Industry Communication::J Society & social sciences::JH Sociology & anthropology::JHB Sociology
    Language: English
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  • 12
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    Nutrition in Pregnancy - Volume II (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2023-12-21
    Description: Maternal nutrition during pregnancy is of considerable interest to women, their partners and their health care professionals. In developing countries, maternal undernutrition is a major concern. However, with the increased prevalence of abundant high calorie diets, their impact upon pregnancy outcome is of concern. In addition to the amount of nutrition available and its macronutrient composition within a diet, there is emerging evidence highlighting important roles for the lesser studied micronutrients. Added to this complexity is the distinction between maternal and fetal nutrition and the impact the placenta plays in nutrient metabolism and overall nutrient supply to the fetus. Together, these many variables contribute to placental development and function, fetal growth, and, where placental/fetal nutrition and growth is compromised, through poor maternal diet, and/or diet induced alterations in placental metabolism, the impact is dramatic and can lead to lifelong implications for the offspring. This Special Issue book aims to highlight research in many of these areas.
    Keywords: R5-920 ; maternal diet ; postnatal health ; fetal nutrition ; fetal growth ; Maternal nutrition ; bic Book Industry Communication::M Medicine
    Language: English
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  • 13
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    Journal de James Morrison, second maître à bord de la « Bounty » (2022)
    Société des Océanistes
    Details
    Publication Date: 2022-07-01
    Description: On ne peut manquer d’être frappé – à la lecture du Journal de Morrison – par deux caractéristiques : la première est cet extraordinaire don d’observation chez un homme que rien n’avait préparé à cela ; la seconde est cette indulgence qu’il manifeste vis-à-vis des Tahitiens lorsque la description de leurs mœurs l’amène à nous décrire ce qui à nos yeux, pourrait passer pour des défauts. Ceux qui, par goût, ont vécu ou vivent à Tahiti seront particulièrement sensibles à cette faiblesse et se demanderont comme nous l’avons fait, si Morrison n’est pas le premier Blanc à avoir subi cet envoûtement auquel tant de nous ont succombé, pour la plus grande joie de leur existence.
    Keywords: Tahiti ; biographie ; récit personnel ; mutinerie du Bounty ; histoire du Pacifique ; bic Book Industry Communication::R Earth sciences, geography, environment, planning::RG Geography::RGR Geographical discovery & exploration
    Language: French
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  • 14
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    Nationalism, Identity and Statehood in Post-Yugoslav Montenegro (2021)
    Bloomsbury Academic
    Details
    Publication Date: 2024-04-02
    Description: This book provides the most comprehensive study to date of political and social developments in Montenegro from the processes that led to the disintegration of the Socialist Federal Republic of Yugoslavia to Montenegro's eventful trajectory towards independence and, later, towards Euro-Atlantic integration. Kenneth Morrison draws upon an extensive range of primary and secondary sources to illuminate the key developments in Montenegro during three decades characterised by political, social and economic flux. Beginning with the 'happening of the people' in 1988 and concluding with a detailed analysis of political developments in the first decade since Montenegro gained its independence, the author addresses the themes of nationalism, identity, statehood and the party political dynamics in both the Montenegrin and the wider Southeast European context.
    Keywords: History ; History ; thema EDItEUR::N History and Archaeology::NH History::NHD European history
    Language: English
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  • 15
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    Connectivity pathways and advection timescales along the Antarctic continental shelf from a Lagrangian perspective (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-08-24
    Description: The Antarctic Slope Current (ASC) and Antarctic Coastal Current advect heat, freshwater, nutrients, and biological organisms westward around the Antarctic margin, providing a connective link between different sectors of the continental shelf. However, the timescales over which these currents transport water along the shelf, and the strength and pathways of connectivity around the continent, remain poorly understood. We use daily velocity fields from a global high-resolution ocean-sea ice model, combined with Lagrangian particle tracking, to provide a baseline estimate of advection timescales and improve our understanding of circumpolar connectivity around Antarctica. Analysis of particle trajectory experiments shows that advection around the continent is typically rapid with peak transit times of 1–5 years for particles to travel 90° of longitude downstream. The ASC plays a key role in driving connectivity in East Antarctica and the Weddell Sea, while the Coastal Current controls connectivity in West Antarctica, the eastern Antarctic Peninsula, and along the continental shelf east of Prydz Bay. Crucially, the West Antarctic sector, which has experienced rapid melting, has widespread connectivity with all regions of the Antarctic shelf. These findings assist us in understanding the locations and timescales over which anomalies, such as meltwater from the Antarctic Ice Sheet, can be redistributed downstream.
    Language: English
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  • 16
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    Entrainment and dilution of cumulus thermals (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-07-03
    Description: Numerous studies based on observations and large-eddy simulation (LES) have shown that cumulus clouds are typically composed of one or more ascending large thermals (“large” meaning a thermal size similar to the width of the cloud as a whole). Here, mechanisms driving entrainment in cumulus thermals are examined and contrasted with entrainment in dry thermals. Dry thermals entrain mainly by a process of baroclinic vorticity generation which results from their initial buoyancy becoming concentrated near the thermals’ rotation centers, while they undergo little detrainment. As a result, net entrainment of environmental fluid is driven by an organized flow into the thermals, and they grow in volume as they rise. A similar picture holds for both laminar and turbulent dry thermals, suggesting that smaller-scale turbulent eddies are relatively unimportant in driving entrainment. The nature of entrainment for moist cumulus thermals is substantially different mainly because of condensation and latent heating in their cores. This limits the spreading induced by baroclinic generation of vorticity and thus entrainment efficiency is only about one-half that for dry thermals, all else being equal. This result is consistent with LES showing that cumulus thermals undergo little increase in size as they ascend. Thus, the dilution that does occur in cumulus thermals is mainly associated with entrainment (inflow) balanced by detrainment (outflow), presumably driven by smaller-scale turbulent eddies, in contrast to the situation for dry thermals. A conceptual model based on these ideas will be presented, as well as implications for representing entrainment in cumulus parameterizations.
    Language: English
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  • 17
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    Contrasting LADCP measurements from a glider and bottom moorings in the Florida straits (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-08-09
    Description: A glider equipped with a propulsion system was deployed in the Straits of Florida to study a strong western boundary current. The glider carried an ADCP and a CTD to collect current velocity, temperature, and density measurements. The velocity data were analyzed using LADCP techniques to correct for the glider's movement using an onboard GPS and bottom tracking. The mooring array, consisting of CTD chains and bottom-mounted ADCPs, was also deployed in the Straits of Florida. The glider's CTD and LADCP profiles from these case studies were consistent with the mooring array. These results confirmed the effectiveness of gliders with propulsion systems for oceanographic measurements in strong western boundary current environments, such as the Gulf Stream. However, the propulsion system increases the risk of entrapment. Hence an acoustic beacon was added for search and rescue in case of entanglement with fishing lines or debris commonly found in populated coastal areas.
    Language: English
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  • 18
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    Abyssal ocean overturning slowdown and warming driven by Antarctic meltwater (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-05-04
    Description: The abyssal ocean circulation is a key component of the global meridional overturning circulation, cycling heat, carbon, oxygen and nutrients throughout the world ocean. The strongest historical trend observed in the abyssal ocean is warming at high southern latitudes, yet it is unclear what processes have driven this warming, and whether it is linked to a slowdown in the ocean's overturning circulation. Furthermore, future change in the abyssal overturning remains uncertain, with the latest CMIP6 projections not accounting for dynamic ice-sheet melt. In this talk I will present new transient forced high-resolution coupled ocean – sea-ice model simulations to show that under a high emissions scenario, abyssal warming is set to accelerate over the next 30 years. We find that meltwater input around Antarctica drives a contraction of Antarctic Bottom Water (AABW), opening a pathway that allows warm Circumpolar Deep Water greater access to the continental shelf. The reduction in AABW formation results in warming and ageing of the abyssal ocean, consistent with recent measurements. In contrast, projected wind and thermal forcing has little impact on the properties, age, and volume of AABW. These results highlight the critical importance of Antarctic meltwater in setting the abyssal ocean overturning, with implications for global ocean biogeochemistry and climate that could last for centuries.
    Language: English
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  • 19
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    Glider and Wirewalker measurements of coastal circulation at the Florida Shelf (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-05-04
    Description: We deployed a propulsion system-aided glider in a high current environment off the Florida shelf fitted with an ADCP, a CTD, and optics channel sensors to obtain measurements of current velocities, salinity, temperature, pressure, dissolved organic matter (DOM), chlorophyll, and backscatter. We also used a wave-powered profiling platform, a Wirewalker, fitted with both an ADCP and a CTD to obtain measurements at a 120-m isobath. ADCP velocities from both devices were validated using glider coordinates and overlapping temporal windows for comparisons between dives. Processing of the datasets motion-corrected velocity measurements from both devices. Additionally, the glider optics channels were used to assess differences in particle distributions through time. Wirewalker velocity measurements qualitatively coincided with the glider’s ADCP overall, albeit not perfectly quantitatively. This was partly dependent on whether the upcast or downcast for each dive was compared, as well as distance from the glider. Both ADCPs’ velocity measurements show clear evidence of a southward flowing intermittent undercurrent jet previously reported by Soloviev et al. (2017). The glider’s optics channels also show evidence of the undercurrent, and a possible influx of water from Port Everglades. The volume transport by the southward flow is relatively small compared to the Florida Current’s transport. Nevertheless, the processes that maintain and account for the variability of the southward flow are important for a number of practical applications including the propagation of pollution and genetic information against the Florida Current.
    Language: English
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  • 20
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    Mechanisms controlling cumulus dilution in large-eddy simulations of the shallow-to-deep convective transition (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-06-14
    Description: The understanding of cumulus mixing has long been challenged by difficulties in quantifying entrainment, detrainment, and dilution (EDD). Although recent advancements have been made in this area, they have not led to robust causal explanations of the mechanisms controlling EDD. Both large-eddy simulations (LES) and observational studies have identified correlations between different aspects of EDD and environmental or cloud-related parameters, but it is unclear whether these correlations reflect causes or effects of EDD on the cloud. To gain further insights, this study conducts LES of the shallow-to-deep convective transition. Two numerical configurations are used, one a classical LES where an ensemble of cumuli develop in an otherwise horizontally homogeneous flow and another a locally forced cumulus over a surface heat source. To quantify EDD, a new “semi-direct” diagnosis technique is developed that sidesteps the detailed and time-consuming calculations required for direct quantification. This method is explained and verified against a corresponding direct calculation. Then, the sensitivities of EDD within buoyant convective cores to core properties (area, updraft speed, buoyancy) are examined. While EDD varies strongly and inversely with all three core properties over all clouds, analyses that control for individual properties reveal that updraft speed and buoyancy are more strongly correlated with EDD than cloud cross-sectional area. Also, EDD is nearly twice as large for cumuli in the LES configuration than for the locally forced cumulus configuration. Additional investigation is performed to interpret the above trends as well as the sharp difference in EDD between the two configurations.
    Language: English
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