734 research outputs found
Railroad Miscellany P.16
No full textPrivate car Virginia City at the old S.L.C. Union Depot now owned by the State of Utah & used by Amtrak. This car was laying over between Amtrak trips. Once owned by author Lucius Beebe and friend Charles Clegg. Car carries the Pullman name on the side and was once owned by Pullman and used in its services. Rebuilt as a private car by Beebe and Clegg with a very plush ornate interior. Painted in a two-tone gray scheme. Once used by the Southern Pacific and Union Pacific for pre-World War II passenger cars. Donor & Photog: Mike B. Davis
Numerical modelling of wave agitation in ports and access channels: a comparison study between SWASH and MIKE 21bw.
No full textThe determination of wave penetration in ports is of great importance for the design of coastal structures and for the efficiency of port operations. Nowadays, coastal engineers can make use of numerical models for the assessment of wave climates in ports. Various numerical models exist, including the phase resolving models SWASH (TU Delft) and MIKE 21bw (DHI). Van Oord Dredging and Marine Contractors are currently using the numerical model MIKE 21bw. To get a bit more familiar with SWASH and to see how the two numerical models relate to one another, they initiated this master project together with TU Delft. Therefore, the main aim of this thesis is to compare the numerical models SWASH and MIKE 21bw in terms of their accuracy, computational requirements and numerical stability for waves encountering approach channels and waves propagating into ports. A theoretical analysis between the two numerical models is presented first which shows that they are fundamentally different, i.e. based on different equations and assumptions. The main difference is that SWASH uses the non-hydrostatic non-linear shallow water equations, including the vertical coordinate, while MIKE 21bw uses the (enhanced) Boussinesq equations which exclude the vertical coordinate. Another difference is that SWASH may use multiple vertical layers, improving its dispersion characteristics. Therefore, the application range of SWASH is larger in terms of the maximum water depth to deep water wave length. Furthermore, SWASH can include more physical phenomena and does not require a minimum water depth as MIKE 21bw does. Beside the theoretical analysis, a comparison study was performed making use of a physical experiment of an approach channel (Case 1) and of a harbour basin (Case 2). From the comparison of the measurements with the numerical simulation of the approach channel (Case 1), it was found that both numerical models are capable of resolving wave-channel interaction for long waves (f < 0.13 Hz) and the accuracy in both models is comparable, although the significant wave height based on the total wave spectra is under-estimated in both numerical models. Numerical damping cannot (fully) explain the under-prediction of the significant wave height. Further, it is believed that inaccuracies/uncertainties in the physical experiment regarding the measurements and the setup were quite severe. This may explain the observed differences between the numerical models and physical model results. A comparison of the numerical simulations of the harbour (Case 2) with the physical experiment shows that both numerical models can accurately model wave penetration of primary waves into ports when simulating on prototype scale. However, the simulations performed on physical model scale (same scale as the physical experiments) resulted in critical numerical instabilities in both numerical models, especially in MIKE 21bw. The accuracy in predicting the significant wave height and energy period is comparable for both numerical models. Furthermore, SWASH turned out to be numerically more stable while the computational requirements are less in MIKE 21bw when two vertical layers are used in SWASH. Finally, a general guideline is presented for the selection of SWASH or MIKE 21bw for wave modelling purposes.Civil Engineering and GeosciencesHydraulic EngineeringCoME
Scientometric portrait of Nobel laureate Leland H. Hartwell
Get PDFLeland H. Hartwell was honoured with the Nobel Prize in Physiology or Medicine (2001) at his 62 years age and at 41 years of research publishing career. The first contribution of the author was in 1961 at the age of 22. The number of his contributions in a year peaked in 1997 when it touched 8. He had 108 publications during 1961 – 2001 in domains: Molecular Biology of Cell Cycle Regulation (43), Genetics of Cell Division (48), Genomic Re-arrangement and DNA Repair (9), Molecular Genetics of Yeast Cell Fission (5), and Drug Target Interaction (3) which were analysed for authorship pattern with his 101 collaborators. Most active researchers having number of publications with Leland H. Hartwell were : Weinert, T. A. (10), Garvik, B. M. (8), McLaughlin, C. S. (8), Jenness, D. D. (5). His productivity coefficient was 0.76 which clearly indicates that his productivity increased after 50 percentile age. Highest collaboration coefficient (1) for Leland H. Hartwell was found during 1963-1965, 1968-1969, 1977, 1981-1983, 1985-1990, 1996 and 1998-2001. Journals have been the most preferred channel of communication where, as many as 96 papers out of 108 have been published. The core journals publishing his papers were: Cell (14), Genetics (12), Mol. Cell Biol. (8), J. Bactariol. (7), J. Cell Biol. ( 7), Science (7) J. Mol. Biol.(6), Exp. Cell Res. (5), and Proc. Nat. Acad. Sci.(5). Publication density is 2.63 and Publication concentration is 14.63. Most prolific keywords in titles of publications were: Saccharomyces cerevisiae , Yeast , Cell division cycle , RAD9, DNA Damage , Genes , Cell cycle, Genetic control , Check point (s) , Cell division , Mutant of Yeast
Video active learning : preparing science students for real future professional communication needs
No full textA revised version of the talk given at the TESOL Convention, Caen, April 1986, and at the APLIUT Congress, CIEP, Sèvres, in May 1986.The author of this article teaches in a scientific and technical university environment. In these pages he explains how an English teacher, not necessarily competent in science and technology, can help an average student become an effective communicator in such fields. His method is based on : a) a very methodological presentation technique (use of specific visual aids for specific oral purposes), the presentation itself video-taped. b) the criticism of the presentation video.tape for improvement (linguistic tools and savoir faire provided by the teacher). c) An evaluation that considers the students improvement during the repetition of the presentation the following week.Hollett Mike. Video active learning : preparing science students for real future professional communication needs. In: Cahiers de l'APLIUT, volume 6, numéro 2, 1986. La Grammaire, comment l'enseigner vraiment ? pp. 103-111
Saga of the Whispering Hills - 091
No full textPhotograph - Cast member Mike Milne (Soldier Jim McIntosh). Saga of the Whispering Hills, presented by the Athabasca Players for the 75th Anniversary of Athabasca, Albert
Nobel Laureate Anthony J Leggett: A scientometric portrait
Get PDFThis paper attempts to analyse the publication productivity of Anthony J. Leggett, the 2003 Nobel Prize winner in physics. His contributions peaked in 1987, 1994, and 1998 with 10 papers each. He had 194 publications during 1964 - 2004 in domains like Superfluid 3He (65), Foundations of Quantum Mechanics (36), Dissipative Quantum Systems (24), Atomic Alkali Gases (18), and Miscellaneous (51)which were analysed for authorship pattern with his 70 collaborators. Most active collaborators with Anthony J Leggett were: A. Garg with six papers and A. O. MCaldeira, D. M. Ginsberg, D. J. Vanharlingen , F. Sols, S.Takagi and D. A. Wollman with five papers each. His productivity coefficient was 0.60 which clearly indicates that his productivity
increased after 50 percentile age. The highest degree of collaboration (1) for Anthony J. Leggett was found during 1964, 1971 and 1983. Journals have been the most preferred channel of communication, where as many as 139 papers out of 194 have been published. The core journals publishing his papers were: Phys. Rev. Leu. (42), Phys. Rev. B (9), J. Low Temp. Phys. (8),Phys. Rev. A (7), Ann. Phys. (6), Foundations of physics (6), J. Phys.(5), Prog. Theor: Phys. (5), and Rev. Mod. Phys. (5).Publication density was 3.02 and publication concentration was 3.59
Saga of the Whispering Hills - 039
No full textPhotograph - Glenda Waddle, Alex Lafferty, Mike Saluk, and Carl Carlson. Saga of the Whispering Hills, presented by the Athabasca Players for the 75th Anniversary of Athabasca, Albert
Chromium
Get PDFIncludes bibliographical references (p. 427-496) and index.Chemical manager(s)/author(s): Sharon Wilbur, Henry Abadin, Mike Fay, Dianyi Yu, Brian Tencza, ATSDR, Division of Toxicology and Human Health Sciences (proposed), Atlanta, GA; Lisa Ingerman, Julie Klotzbach, Shelly James, SRC, Inc., North Syracuse, NY
Saga of the Whispering Hills - 041
No full textPhotograph - Cast members Mike Milne (Mr. Gullion), Kathy Topola (Mrs. Gullion) and Ken Knight. Saga of the Whispering Hills, presented by the Athabasca Players for the 75th Anniversary of Athabasca, Albert
Saga of the Whispering Hills - 068
No full textPhotograph - Cast members Frank Appleby, Dennis MacNeil, Mike Milne, Carl Olson, Reg Netterville and Ken Knight (Judge). Saga of the Whispering Hills, presented by the Athabasca Players for the 75th Anniversary of Athabasca, Albert
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