589 research outputs found
Author Correction: New perspectives on Neanderthal dispersal and turnover from Stajnia Cave (Poland)
No full textThe Author contributions section now reads:“W.N., A.N. and S.T. designed research; A.P., M.H., W.N., S.B., M.U., A.M., H.F., M.D.B., P.S., K.S., M.Ż., A.W., A.N. and S.T. performed research; A.P., M.H., W.N., S.B., M.U., A.M., H.F., M.D.B., P.S., K.S., M.Ż., A.W., A.N. and S.T. analysed data; A.P., M.H., S.T., W.N. and S.B. wrote the paper with the collaboration of all the co-authors.
Author Correction:A 41,500 year-old decorated ivory pendant from Stajnia Cave (Poland)
No full textCorrection to: Scientific Reports https://doi.org/10.1038/s41598-021-01221-6, published online 25 November 2021The original version of this Article contained errors in the author list where Marjolein D. Bosch was omitted from the author list, and Mikołaj Urbanowski was incorrectly listed as an author of the original Article, and has subsequently been removed.The Author contributions section now reads:“S.T. W.N. and A.N. conceived the project; S.T., W.N., A.P., M.B., S.C., M.D., H.F., A.M., M.D. B., D.P., M.P.R., C.M.R., V.S-M., G.M.S., P.S., M.S., K.S., A.V., F.W., H.W., A.W., M.Z., S.B., A.N., J-J. H., performed research; S.T., A.P., W.N., M.B., M.D.B., S.C., M.D., H.F., A.M., D.P., M.P.R., C.M.R., V.S-M., G.M.S., P.S., M.S., K.S., A.V., F.W., H.W., A.W., M.Z., S.B., A.N., J-J. H. analysed all archaeological data; S.T. and A.P. wrote the paper with the collaboration of all the co-authors.”The original Article and its accompanying Supplementary Information file have been corrected
Hereditary spastic paraplegias in the Netherlands. Clinical aspects and mutational spectrum
No full textContains fulltext :
120592.pdf (Publisher’s version ) (Open Access)Radboud Universiteit Nijmegen, 20 december 2013Promotores : Kremer, H.P.H., Willemsen, M.A.A.P. Co-promotores : Warrenburg, B.P.C. van de, Scheffer, H
Decomposição de detritos vegetais de Rhizophora mangle e Avicennia schaueriana nas áreas alagadas dos manguezais do Itacorubi e Ratones - Florianópolis/SC
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Programa de Pós-graduação em Biologia Vegetal, Florianópolis, 2010Este estudo trata da decomposição de detritos de espécies vegetais nativas do manguezal (Rhizophora mangle e Avicennia schaueriana), tendo por objetivo examinar as taxas de decomposição dos detritos vegetais e relacionar o papel dos fatores abióticos neste processo. Para isso, foi realizado um experimento que iniciou no período de inverno (julho a novembro de 2008) e outro que iniciou no período de verão (fevereiro a junho de 2009), envolvendo dois locais, Manguezais de Ratones e Itacorubi, situados em Florianópolis, Santa Catarina. Utilizou-se dentro destes períodos a variação temporal 7, 15, 30, 60, 90 e 120 dias para demonstrar a perda de massa do detrito foliar. Para encontrar o percentual de perda de matéria orgânica foi utilizado o modelo proposto por Petersen e Cummins (1974), e para correlação entre os períodos do ano empregou-se a Análise dos Componentes Principais. Com isto, este trabalho conclui que: a variação temporal da decomposição apresentou diferenças significativas entre o início (7, 15, 30) e o final 60 a 120 dias do experimento. O composto lábil do detrito foliar foi rapidamente decomposto no primeiro mês, restando componentes refratários. A temperatura representou o fator de maior influência na decomposição inicial (7, 15, 30 dias). As taxas de decomposição encontradas foram semelhantes entre as espécies.This study addresses the decomposition of detritus of native plant species of mangrove (Rhizophora mangle and Avicennia schaueriana), aiming to examine the rate of decomposition of nutrients of the vegetables debris to the soil and relate the role of the abiotic factors in this process. For this, we conducted an experiment that began in the winter (July-November 2008) and another that began in the summer period (February-June 2009), involving two sites, such as Itacorubi and Ratones Mangrove, located in Florianopolis, Santa Catarina. It was used within these periods a temporal variation of 7, 15, 30, 60, 90 and 120 days to demonstrate the leaf detritus mass loss. To find the decomposition rate was used the model proposed by Petersen and Cummins (1974), and for correlation between these times its appeals to the Principal Component Analysis. Following, this work concludes that: the temporal variation of decomposition showed significant differences between early (7, 15, 30) and the final 60 to 120 days. The labile composite of detritus leaf was quickly decomposed in the first month, leaving refractory components. The temperature represented the greatest factor in the initial decomposition (7, 15, 30 days). The rate of decomposition found was similar between species
: A software platform for centralizing, enriching and spatializing heterogeneous data
No full textContributeurs : Violette Abergel, Marco Callieri, Isabelle Cao, Livio De Luca, Anaïs Guillem, Olivier Malavergne, Adeline Manuel, Ariane Néroulidis, Thomas Pouyet, Roxane Roussel, Miled Rousset, Sarah Tournon, Aurore Pfitzmann //Author contributions : Conceptualization: L.D.L.; Data curation: V.A., M.C., I.C., L.D.L., A.G., O.M., A.M., A.N., T.P., R.R., M.R., S.T.; Formal analysis: ; Funding acquisition: L.D.L.; Investigation: ; Methodology: ; Project administration: L.D.L., A.P.; Resources: ; Software: ; Supervision: L.D.L.; Validation: L.D.L.; Visualization: V.A., M.C., I.C., L.D.L., A.G., O.M., A.M., A.N., T.P., R.R., M.R., S.T.; Writing – original draft: V.A., M.C., I.C., L.D.L., A.G., O.M., A.M., A.N., T.P., R.R., M.R., S.T.; Writing – review & editing: L.D.L.International audiencePresentation of the tools making up the n-Dame ecosystem designed by members of the “Digital Data” Working Group of the Chantier Scientifique Notre-Dame.Présentation des outils composant l'écosystème n-Dame conçu par les membres du Groupe de Travail "Données numériques" du Chantier Scientifique Notre-Dame
Experimental research on the effects of surface screens on a mobile bed
No full textIn 2000 the Dutch government chose a new point of view for the Dutch rivers: “Room for the River”. This viewpoint is the basis for a new approach of high water protection in the Netherlands. Instead of strengthening and raising the dikes, solutions must be based on space and spatial quality. One of the suggested measures is the addition of secondary channels. The purpose of these channels is enlarging the conveyance area and the ecological role of the river. Maintaining the profile of these channels involves substantial financial consequences. Finding a sustainable solution for undesired erosion or sedimentation is the main focus of this study. The research question is stated as follows: “How can the undesired erosion or sedimentation in secondary channels be corrected with a temporary but sustainable solution in the form of surface screens?”. The main part of this study is an experimental study on the effects of surface screens on a mobile bed. The design of the physical experiments requires choices about the geometry of the flume. The experiments were carried out with a straight flume and with a dividing wall. Preparing the experiments requires information about the flume facility. The experiments have been carried out in the Environmental Fluid Mechanics Laboratory of DUT. The upstream boundary conditions are discharge and velocity distribution. The downstream boundary condition consisted of a fixed water level. The water level was kept constant along the natural slope of the surface. The experiments consist of taking velocity and bed level. The angle of attack and the penetration depth were chosen to be variable. The angle of attack was varied between 15 and 25 degrees. With these relatively small angles the screen acts as guidance for the flow, instead of an obstruction. The penetration depth was varied between 20% and 60% of the water column. The initial test run determined the optimal measurement duration and the initial equilibrium. Four representative cases have been described in detail, giving support to the general conclusions. The flow pattern changes under influence of the surface screen. The main flow direction is guided by the screen, introducing a transverse velocity at the surface. As flow continuity in the flume has to be maintained, the water near the bottom is forced to have a transverse velocity in opposite direction. Redistribution of the suspended transport and the bottom transport was induced. This generated locations were the actual transport did not meet the transport capacity, which gives rise to morphological changes. Next to the spiral motion the screen had an effect on the longitudinal flow velocities. The attacked side of the flume experiences a higher velocity, thereby having a higher transport capacity. This higher capacity gives rise to local erosion of the bed. At the unattacked side, sedimentation occurs, thereby rising the bed level. In the B-series of the experiment a dividing wall was added. The screen in front of the bifurcation gave rise to the same two processes, but the wall introduced an extra effect. The screen influenced the bifurcation relationship. The bed level adapted to the new conditions. The upstream effect of the bifurcation is explained by changes in water level topography, thereby influencing the backwater curve. In general the wall amplified the morphological development of the bed. Finally some suggestions have been made for the practical application of surface screens. In general the screens can be applied in a (secondary) channel or in front of a bifurcation. The use of a screen inside a channel has an advantage not to interfere with the navigation channel. The advantage of a screen in front of a bifurcation is influencing two channels simultaneously. One of the main disadvantages of the latter is the possibility of disturbing the delicate bifurcation relationship. When carefully implemented this effect can simultaneously be the main advantage of this screen layout, as the morphological response increases.Hydraulic EngineeringCivil Engineering and Geoscience
De ontwikkeling van de onderwatersuppleties Ter Heijde, Noordwijk en Katwijk
No full textOp 11 augustus 2006 heeft RIKZ aan de combinatie Witteveen+Bos / Koster Engineering opdracht verleend tot het uitvoeren van een evaluatie voor de onderwatersuppleties bij Ter Heijde, Noordwijk en Katwijk. De studie is begeleid door de heren AC. de Kruif, R. Spanhoff (RIKZ) en AJ.F. van der Spek (TNO). De evaluatie heeft uit de volgende werkzaamheden bestaan: - het analyseren van de morfologische ontwikkelingen van een drietal onderwatersuppleties, te weten de suppleties bij Ter Heijde, Noordwijk en Katwijk, alsmede het analyseren van de interactie tussen de onderwateroeversuppleties bij Katwijk en Noordwijk; - het betrekken van het duinmassief in de morfologische analyses en zandbalansen; - het analyseren van relaties tussen meteorologische en hydraulische condities en de eerder genoemde ontwikkelingen, waarbij extra aandacht dient te worden geschonken aan de laagfrequente, hoogenergetische condities; - het onderzoeken van de relatie tussen zandbankmigraties en de zandvolumeveranderingen binnen het kustvak om vast te stellen of er sprake is van netto zandtransporten (in dwarsrichting) door deze migraties. De werkzaamheden dienen ervoor om licht te werpen op de volgende onderzoeksvragen die voortvloeien uit voornoemde eerder uitgevoerde onderzoeken: (i) waar gaat het gesuppleerde zand naartoe, hoe snel en welke ruimtelijke patronen zijn daarbij te onderkennen; (ii) om hoeveel zand gaat het en zijn de gevonden ruimtelijke volumevariaties het gevolg van vormveranderingen in het profiel (geen netto transport) of is er sprake van een netto toe- of afname van de volumes; (iii) in hoeverre is de waargenomen ontwikkeling beïnvloed door opgetreden stormen. Op hoofdlijnen bracht het onderzoek de volgende -deels- nieuwe inzichten: - het fenomenologisch gedrag bij Ter Heijde van met name de ondiepe zones in reactie op de onderwatersuppietie; - de overdracht van zand vanuit het suppletielichaam naar het natuurlijke bankensysteem; - de mate waarin de meer gangbare conceptuele modellen voor het gedrag van de onderwatersuppletie en de respons van de kust hierop kan worden ondersteund door de -vooral volumieke- data; - de distributie van het suppletiezand dwars op de kust en langs de kust; - de volumieke ontwikkelingen van het duinmassief in het suppletievak en de invloed van onderwatersuppieties hierop; - de effecten op de volume-inhoud van naburige kustvakken, met name die van het duin; - de mate waarin kustontwikkelingen en het waargenomen gedrag van onderwatersuppleties uit de hydrodynamica kunnen worden verklaard.RW1472-
Stabilizing Control System of a Platform of a Buoy for Offshore Wind Assessment
No full textThe purpose of this project is to design a control system to stabilize a platform on a buoy. Stabilization of the platform on the buoy is needed for reliable measurements of wind speed and wind direction on sea using LiDAR (Light Detection And Ranging) modules. These modules use the reflection of particles in the air to measure the wind speed and wind direction. This report is a description of the design of a prototype for a buoy with a stabilized platform. The research contains a study on the behavior of a buoy on waves, a description of the choices made for the design, a description of the used test methods, the test results and some recommendations for improvements on the design, based on the test results. The platform is controlled by three linear actuators of adjustable length. The angle of tilt of the platformis measured with a gyroscope and is used for controlling the linear actuators. The platform is able to compensate an angle of tilt that is smaller than 38° . The reaction time on deviations that are smaller than 10° is less than 1.2 seconds. The reliability on the long term must be improved, through implementation of some recommendations. One of these recommendations is the use of a Kalman filter to prevent long term drift of sensor output by combining different kinds of sensors.Electrical EngineeringElectrical Engineering, Mathematics and Computer Scienc
: A software platform for centralizing, enriching and spatializing heterogeneous data
No full textContributeurs : Violette Abergel, Marco Callieri, Isabelle Cao, Livio De Luca, Anaïs Guillem, Olivier Malavergne, Adeline Manuel, Ariane Néroulidis, Thomas Pouyet, Roxane Roussel, Miled Rousset, Sarah Tournon, Aurore Pfitzmann //Author contributions : Conceptualization: L.D.L.; Data curation: V.A., M.C., I.C., L.D.L., A.G., O.M., A.M., A.N., T.P., R.R., M.R., S.T.; Formal analysis: ; Funding acquisition: L.D.L.; Investigation: ; Methodology: ; Project administration: L.D.L., A.P.; Resources: ; Software: ; Supervision: L.D.L.; Validation: L.D.L.; Visualization: V.A., M.C., I.C., L.D.L., A.G., O.M., A.M., A.N., T.P., R.R., M.R., S.T.; Writing – original draft: V.A., M.C., I.C., L.D.L., A.G., O.M., A.M., A.N., T.P., R.R., M.R., S.T.; Writing – review & editing: L.D.L.International audiencePresentation of the tools making up the n-Dame ecosystem designed by members of the “Digital Data” Working Group of the Chantier Scientifique Notre-Dame.Présentation des outils composant l'écosystème n-Dame conçu par les membres du Groupe de Travail "Données numériques" du Chantier Scientifique Notre-Dame
Raising Awareness of Therapeutic Misconception and Optimism Around Clinical Trials in Huntington's Disease
No full textNeurological Motor Disorder
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