670 research outputs found
Particle motion in Stokes flow near a plane fluid-fluid interface. Part 1. Slender body in a quiescent fluid.
No full textConsiders translation and rotation, each in three mutually orthogonal directions, thus determining the components of the hydrodynamic resistance tensors which relate the total hydrodynamic force and torque on the particle to its translational and angular velocities for a completely arbitrary translational and angular motion. Calculates trajectories for a freely rotating particle under the action of an applied force either normal or parallel to a flat interface.-from Author
Particle motion in Stokes flow near a plane fluid-fluid interface. Part 2. Linear shear and axisymmetric straining flows.
No full textConsiders the motion of a sphere or a slender body in the presence of a plane fluid-fluid interface with an arbitrary viscosity ratio, when the fluids undergo a linear undisturbed flow. Determines the motion of a neutrally buoyant particle freely suspended in the flow. The theory yields general trajectory equations for an arbitrary viscosity ratio. Among the most interesting results for motion of slender bodies is the generalization of the Jeffrey orbit equations for linear simple shear flow. -from Author
Correction to: Clinical Trials in High-Risk Medulloblastoma: Evolution of the SIOP-Europe HR-MB Trial (Cancers, (2022), 14, 2, (374), 10.3390/cancers14020374)
No full text\ua9 2024 by the authors.In the original publication [1], the funder Cancer Research UK, A2524 was not included. Keith Wheatley, Simon Gates, and Victoria Homer were not included as authors in the original publication. The reason we would like to add the authors is that the statistical element of the trial and the trial design were in a large part done by the statistical authors and the team were necessary for the running of the trial. The corrected Author Contributions Statement appears here. Author Contributions: Conceptualization, S.B., N.A., L.G., M.M., K.W., S.R. and S.C.C.; methodology, K.W., S.G. and V.H.; project administration, S.G. and V.H.; resources, S.B., N.A., L.G., M.M., S.R. and S.C.C.; writing—original draft preparation, S.B., N.A., L.G., M.M., S.R. and S.C.C.; writing—review and editing, S.B., N.A., L.G., M.M., S.R. and S.C.C. All authors have read and agreed to the published version of the manuscript. Author Contributions: Conceptualization, S.B., N.A., L.G., M.M., K.W., S.R. and S.C.C.; methodology, K.W., S.G. and V.H.; project administration, S.G. and V.H.; resources, S.B., N.A., L.G., M.M., S.R. and S.C.C.; writing—original draft preparation, S.B., N.A., L.G., M.M., S.R. and S.C.C.; writing—review and editing, S.B., N.A., L.G., M.M., S.R. and S.C.C. All authors have read and agreed to the published version of the manuscript. Cancer Research UK Clinical Trials Unit, University of Birimingham, Birmingham B15 2TT, UK; [email protected](K.W.); [email protected] (S.G.); [email protected] (V.H.) The authors apologize for any inconvenience caused and state that the scientific conclusions are unaffected. This correction was approved by the Academic Editor. The original publication has also been updated
Manned spacecraft external thermal control using the Johnson tube heat pump
No full textIssued as Final report, Project E-25-W41Final report has author: L.G. Johnso
Agricultural Underdevelopment in Caistor Township
No full textTitle: Agricultural Underdevelopment in Caistor Township, Author: Benard W. Darnel, Location: ThodeThe purpose of this study is to describe and explain
the extent of agricultural underdevelopment in Caistor Township. Full credit for the author's incentive to investigate
this area must go to Dr. L.G. Reeds of McMaster University,
who in 1964 conducted a survey of the agricultural conditions
in the Niagara Peninsula, on the basis of which a more detailed
study of several areas, including Caistor Township, seemed
warranted. The information for this study originated from a
variety of sources. The most important of these was direct
observations in the field, which after a brief reconnaissance
survey in the early part of May, were carried out systematically
during the months of June, July, and August of 1966. Interviews
were conducted in all parts of the township, in addition
an attempt was made to interview all people in four sample
block areas. It is estimated that out of a total of 165
interviews, 90 involved the owners of "commercial farms";
other people interviewed were retired farmers, non-farming
residents, township officials, clergy men, and store owners. Field observations provided the basis for the
Land Capability Map (Fig.3), for the map showing "Quality of
Land use" (Fig. 5), while information about the distribution
of non-farm dwellings (Fig . 4) and the location of "Century
Farms" (Fig. 2) was obtained from the township office and
from a 4-H club member respectively. Other pertinent data was provided by the Dominion
Census Report for 1961, which is the most recent source of
information on farm classification, farm income, landuse,
and values of agricultural products sold. Finally, the
Soil Survey of Lincoln County, and the Physiography of
Southern Ontario proved to be useful guides in the assessment
of the physiographic conditions of the township. The methodology employed in this study was selected
so as to best facilitate the attainment of the stated objective,
but limited time for investigation and lack of sufficient
quantitative data about individual farms precluded the use
of statistical methods. The study is divided into eight chapters. Chapters
one, three and four deal exclusively with the physical conditions
and with related problems, while chapter two gives
a brief account of relevant historical factors. Chapters five
and six examine the status of agricultural development in
the township, the findings of which are evaluated in chapter
seven. The final chapter contains the summary and conclusion.ThesisBachelor of Arts (BA
Enantioselective Catalytic Allylation And Crotylation Of Aldehydes [alilação E Crotilação Catalítica E Enantiosseletiva De Aldeídos]
No full textThe field of chiral catalysis has experienced explosive growth over the last two decades. By now, many of the classical reactions in organic synthesis can be carried out efficiently in asymmetric manner. As one of the fundamental and powerful C-C bond-forming reactions, enantioselective catalytic allylation (ECA) and crotylation (ECC) of aldehydes has attracted considerable attention. In this article, we present an overview about the importance of chiral Lewis acids and bases in catalytic enantioselective addition of allyl- and crotyl metals to aldehydes and the application of this methodology in the total synthesis of natural and non-natural products.29510091026Wender, P.A., (1993) Organic Synthesis. Theory and Applications, , Hudlicky, T., ed.Jai PressSheldon, R.A., (1997) Chem. Ind., p. 12Sime, J.T., (1999) J. Chem. Educ., 76, p. 1658Yanagisawa, A., (1999) Comprehensive Asymmetric Catalysis, , Jacobsen, E. 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Towards understanding the 3D infrasonic wavefield
No full textIn the evening of 2014, June 03, two explosions occurred at the MSPO-2 plant of Shell Moerdijk. The Cabauw infrasound array detected the infrasound generated by the blasts as two distinct signals. The distance between Shell Moerdijk and the Cabauw infrasound array is 40.5 km. This array is unique as it measures infrasound in 3D. The Fisher analysis is used to process the infrasound signals. The horizontal 2D Fisher analysis veries the infrasound source to be Shell Moerdijk, and it shows an azimuthal deviation of 2.1 caused by the influence of tropospheric crosswinds. The Shell Moerdijk explosions are used as a case study to investigate the measurement of infrasound in 3D. The frequency of the signals detected at the tower has been observed to be lower than the frequency of the signals detected at the surface. A possible reason is that the infrasound signals propagate through small pipes before reaching the tower sensors. Consequently, a reduced coherency between the tower and ground signals exists. Due to this lack of coherency, the 3D Fisher analysis was not able to perform correctly. The signature of the infrasound waveform with altitude is examined in detail, obtained by the vertical measurement of infrasound. It is showing up- and down-going waves in both explosion signals which can only be seen in the 3D vertical measurements. Ray tracing confirms the existence of these different waves. In summary, this research shows the added value of measuring infrasound in 3D.Civil Engineering and GeosciencesGeoscience & EngineeringDouble degree Applied Geophysic
Some remarks on optimizing production cycle times for CFRTP products
No full textAerospace Engineerin
The inaudible symphony: On the detection and source identification of atmospheric infrasound
No full textSound becomes inaudible if it consists of frequencies lower than 20 Hz, i.e. the human hearing threshold, and is called infrasound. Low frequency acoustic signals were first discovered after the eruption of the Krakatoa (Indonesia) in 1883. Due to its low frequency content, this infrasound traveled up to seven times around the globe while reaching altitudes over 100 kilometer. The ability to detect explosions with infrasound resulted in substantial scientific and societal interest during World War I and the era of atmospheric nuclear testing. This interest diminished as nuclear tests were confined to the underground under the Limited Test Ban Treaty in 1963. Recently, with the signature of the Comprehensive Nuclear-Test-Ban Treaty, infrasound gained renewed attention as it is being used as a verification technique. This thesis describes the complete sequence of measuring, processing and interpreting infrasound data. A microbarometer was developed and deployed in arrays to measure infrasound. Array processing and statistical detection techniques are applied to extract signals of interest from the continuous recordings. Knowledge on the atmospheric propagation appeared essential in identifying infrasonic sources, like meteors, volcanoes, sea waves and accidental chemical explosions. A large amount of coherent infrasound is continuously being detected from both natural and man-made sources, i.e. the inaudible symphony. Applications are foreseen in acoustic remote sensing where infrasound can be used as passive probe for the upper atmosphere. Non-acoustic phenomena, like gravity waves, can also be detected with the methods described in this thesis.Aerospace Engineerin
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