671 research outputs found
Partial concordance between nuclear and organelle DNA in revealing the genetic divergence among Quercus glauca (Fagaceae) populations in Taiwan
No full textPaul Henry Gore-Booth and President F.L. Hovde
No full textPhotograph of President F.L. Hovde; Mr. Paul Henry Gore - Booth (British Diplomat and Author) and President Hovde, Ca. late 1940's
An empirical relationship between the Deacon profile number and the Richardson number under convective conditions
Full text linkMean low-level temperature and wind profiles were constructed for 44 cases of free convection using the data O'Neill, Nebraska, during July and August 1956. Based upon the expression for the normalized logarithmic wind shear first suggested by Ellison and later refined by Panofsky, a theoretical formula for the Deacon number as a function of the Richardson number was derived, and values of the Deacon profile were computed. One of the parameters entering into this formula is the ration of the eddy diffusitivities for heat and momentum. This parameter was, in turn, computed from Priestley's expression for the dimensionless heat flux for free-convective cases. In using observed wind data from the mean profile in order to verify the theoretical computations of B, some marked discrepancies
occurred above the 100 cm level. These were due to inconsistent wind speed readings, and it was necessary to employ control data, based on neutral profiles to correct the wind speed. When this was done, the theoretical and
observed Deacon profile nurnbers were in very good agreement.
The author is deeply indebted to Dr. F.L. Martin
(Professor of Meteorology) for his suggestions and continued help throughout the investigations and during preparation of this paper. Special credit is due to Professor Martin for his large share in developing the derivations in this study.Approved for public release; distribution is unlimited.Captain, Republic of Indonesian Navyhttp://archive.org/details/anempiricalrelat109451210
De stad van de toekomst wortelt in een gezonde bodem
No full textDe stad van de toekomst is een circulaire stad waar de toestand van de bodem cruciaal is voor de leefbaarheid en voor het succesvol doorvoeren van noodzakelijke transities. Gezien de huidige staat van de Nederlandse bodem is een gestructureerde aanpak nodig om de balans tussen boven- en ondergrond te herstellen.The city of the future is a circular city in which the condition of the soil is crucial to liveability and to the successful achievement of necessary transitions. Given the present condition of the soil in the Netherlands, a structure approach is needed to restore balance between subsurface and surface.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Environmental Technology and Desig
Amfibisch wonen in de delta
No full textAlle signalen wijzen erop: onze manier van bouwen en wonen in de delta is op de lange termijn niet vol te houden. Onderzoeker milieutechnisch ontwerpen en universitair hoofddocent aan de TU Delft Fransje Hooimeijer pleit daarom voor een radicale herijking van het deltabeheer. Een ontwerpende, interdisciplinaire aanpak is de eerste stap om de Nederlandse delta in de toekomst veilig en leefbaar te houden. En ja, dat levert soms provocatieve ontwerpen op.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Environmental Technology and Desig
De boven- en ondergrond van de stad als een samenhangend systeem: The surface and subsurface of the city as a united system
No full textNo healthy city without a healthy surface. And yet the soil and its associated eco- and water system are a final piece in area development practice. What if we were to draw cross-sections through the above- and underground city more often and pay more attention to the 'technical space' of nature and the city below ground level? Can we achieve a more sustainable design of urban space with this?Accepted Author ManuscriptEnvironmental Technology and DesignPractice Chair Urban Area Developmen
Rotterdam: A dynamic polder city in the Randstad
No full textThis chapter examines the case of Rotterdam as one of the most representative cities in the Randstad in dealing with water and adapting to the current challenges. The dynamics of the regional water system, which include groundwater and rainwater in combination with surface water in a lowland delta facing the North Sea, is crucial for the process of development and urbanisation of the Dutch polders. By creating the Waterstad area, Rotterdam took profit from its strategic position in the Randstad Delta. Van der Ham described eighth century period of time until the year 1000 as distinguished by ‘natural water management’, as nature ruled over culture. At the end of the nineteenth century, explosive urbanisation and technological prosperity put pressure on the polder cities. The manipulative era is marked by the introduction of the engine and electricity, which had an immense influence on the city and the water system.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Environmental Technology and Desig
Co-Create Resilience: Integrating planners, designers and engineers for adapting to flood risk in Taipei
No full textArchitecture and The Built EnvironmentUrbanis
Distributed agency between 2D and 3D representation of the subsurface
No full textAlthough severely altered, the urban subsurface is the base of the natural system, and is crucial for a stable, green, healthy, and liveable city. It is also the technical space, the engine room of the city where vital functions such as water, electricity, sewers, and drainage are located. This hybrid state needs to be recognized when designing resilient and durable (subsurface) infrastructure within urban renewal projects, so as to properly employ the parameters of both natural and technical systems. Interdisciplinary work is needed in order to be able to link natural systems (a) the water cycle, (b) soil and subsurface conditions, (c) soil improvement technology, and (d) opportunities for urban renewal (e.g. urban growth or shrinkage) in an efficient way.The importance of implementing “boundary spanning” when doing interdisciplinary work that deals with the effects of climate change is a widely recognized method, and has been an object of study in the city of Rotterdam in the past decade. The particular need for a “distributed agency” became clear during several research projects dealing with climate change, because it enables different actors to contribute to the development of the project at different phases. The representation of the city as both a natural and technical construction has been tested through the use of 2D and 3D information, which has played a significant role in enabling designs to incorporate the dimension of the subsurface. 2D and 3D information needs to anticipate different scales of specific planning and/or design phases, and they must also address various topics of the subsurface. For each phase of urban development, the distributed agency between 2D and 3D information is investigated and reflected upon. Conclusions are then drawn on the relationship between 2D and 3D information, and how it could relate in a productive, boundary spanning act that is inclusive of the subsurface. Based on these potential connections, the design of a new concept which implements boundary spanning as a facilitator is presented.Accepted Author ManuscriptEnvironmental Technology and Desig
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