203,146 research outputs found
Use of a rectangular liquid-filled bottom-mounted distensible device to harness nearshore wave power
No full textThe present work aims to find out the applicability of the bulge concept used in the Anaconda (Chaplin et al., 2011) on a possible seabed version. The tested model is a long rectangular duct covered with an elastic membrane and placed on the seabed, parallel to wave propagation. The tension in the membrane and its submergence can be varied by pressurising the system. Two configurations were tested: one with closed ends and one with a Power Take-Off system. Measurements were made of pressure in the duct, membrane displacement and capture width and are compared with a theoretical 1D model.</p
Orbital flow around a circular cylinder. Part 1. Steady streaming in non-uniform conditions
No full textThis work is concerned with the source of an important component of nonlinear loading on a horizontal cylinder beneath waves that is not present in conventional diffraction calculations. Earlier measurements (Chaplin 1984b) have suggested that circulation induced by steady streaming around the cylinder may be responsible for loading which in some cases reduces the perceived inertia force by 50%. The present work is aimed at studying the steady streaming around a cylinder in general non-uniform orbital flow, and determining whether in the particular case of wave-induced flow it could be related quantitatively to the loading.The steady outer flow has been obtained numerically for cases where the steady streaming does not have a reversal, and for cases where a weak reversal is compatible with a uniform outer circulation. It is found that the outer circulation is closely related to the mean streaming velocity around the cylinder at the outer edge of the shear-wave layer. Results for conditions corresponding to previous measurements of force on a horizontal cylinder beneath waves suggest that separation, turbulence, transient effects and organized three-dimensional instabilities should also be considered.<br/
Promotie van H.A.E. Kramer
No full textH.A.E. Kramer met paranimfen E. Spier (r ) en Raden Mas Hidajat (l
Data supporting the comparison of golden-winged warbler and American woodcock productivity in northern Minnesota, USA
No full textSee ReadMe.txt for detailed description of files. Files include model-predicted productivity for both species (raster), digitized land-cover type classification of study area (shapefile), predicted productivity of both species at observed nesting sites, and R code to make the statistical comparisons and produce the graphs in Kramer et al. (2019).Spatially explicit predicted reproductive output for golden-winged warblers and American woodcock at Tamarac National Wildlife Refuge, Minnesota, USA used to compare reproductive output of woodcock and warblers in Kramer et al. (2019; DOI:https://doi.org/10.1016/j.biocon.2019.02.039). Models developed by Peterson (2014: http://hdl.handle.net/11299/167309),Peterson et al. (2016) rely on raw demographic data for golden-winged warblers collected and reported by Peterson (2014; http://hdl.handle.net/11299/167309). Models developed by Kramer (2017; http://hdl.handle.net/11299/188784) and Kramer et al. (in press) use raw demographic data for American woodcock collected and reported by Daly (2014; http://hdl.handle.net/11299/167288).Kramer, Gunnar R; Peterson, Sean M; Daly, Kyle O; Streby, Henry M; Andersen, David E. (2019). Data supporting the comparison of golden-winged warbler and American woodcock productivity in northern Minnesota, USA. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/znag-tn48
Samuel Noah Kramer: 10-06-1981
No full textSamuel Noah Kramer was a Sumerian history and language expert and the author of over 25 books and 150 articles on Sumer. He begins the interview by reading a piece of Sumerian literature and continues by discussing what Sumerian literature is about, the time period it was written in, and the types of literature that the Sumerians wrote. He discusses how he got into cuneiform, the system of writing developed by the Sumerians, and talks about coming to the United States as a child. Kramer concludes the interview by discussing how he became an archaeologist.Archived web contentSUNY BrockportWriters Forum Video
Samuel Noah Kramer: 10-06-1981
No full textSamuel Noah Kramer was a Sumerian history and language expert and the author of over 25 books and 150 articles on Sumer. He begins the interview by reading a piece of Sumerian literature and continues by discussing what Sumerian literature is about, the time period it was written in, and the types of literature that the Sumerians wrote. He discusses how he got into cuneiform, the system of writing developed by the Sumerians, and talks about coming to the United States as a child. Kramer concludes the interview by discussing how he became an archaeologist.https://digitalcommons.brockport.edu/writers_videos/1020/thumbnail.jp
Trachynotus Kramer 1876
No full textTrachynotus Kramer, 1876 Trachynotus Kramer, 1876: 74. Type species Trachynotus pyriformis Kramer, 1876: 74, designated by Michael, 1894: 293. Notes. Trachynotus Kramer, 1876 is a junior homonym of Trachynotus Latreille, 1829 (Coleoptera), and was replaced by Trachytes Michael, 1894.Published as part of Halliday, R. B., 2015, Catalogue of genera and their type species in the mite Suborder Uropodina (Acari: Mesostigmata), pp. 101-147 in Zootaxa 3972 (2) on page 130, DOI: 10.11646/zootaxa.3972.2.1, http://zenodo.org/record/23277
Dinychus Kramer 1886
No full textDinychus Kramer, 1886 Dinychus Kramer, 1886: 255. Type species Dinychus perforatus Kramer, 1886: 255, by original designation. Notes. The genus name has been incorrectly spelled as Dynichus by some authors. Some authors have stated that D. perforatus was described by Kramer (1882), but that appears to be an error.Published as part of Halliday, R. B., 2015, Catalogue of genera and their type species in the mite Suborder Uropodina (Acari: Mesostigmata), pp. 101-147 in Zootaxa 3972 (2) on page 112, DOI: 10.11646/zootaxa.3972.2.1, http://zenodo.org/record/23277
Survey of Italian veterinary practioners on D. immitis and D. repens
No full textDirofilarial infections (D. immitis, D. repens) are vector-borne parasitic diseases mainly of dogs and cats. Moreover, they are zoonotic and endemic areas of both are expanding. The experience of veterinarians is very important for correct prevention and diagnosis. To evaluate this, an electronic questionnaire was sent to all Italian veterinary facilities. In the first months of 2018 a questionnaire was sent by e-mail to 2795 veterinary facilities (surgeries, clinics, hospitals and public facilities). The 31 questions were mainly about in which province the facilities were located, and about diagnosis, prevention and treatment for D. immitis and D. repens in dogs and cats. In addition, it was asked if they knew the Dirofilariosis societies and if they had attended lectures and/or congresses on the topic. Among 662 responses (27%), 33.7% facilities reported infections only of D. immitis, 3.2% only of D. repens, 10.7% mix infections and 52.4% no cases of either parasite in the last year. Dirofilaria
immitis infections were observed above all in the northern and central Italy. However, also many regions of the south and the islands (Sicily and Sardinia) reported heartworm infections. Dirofilaria repens is fairly evenly distributed throughout Italy mainly in co-infections with D. immitis. The most frequent diagnostic method used in dogs was the antigen test, 24.0%, followed by the fresh blood smear together with the antigen test 23.3%, aid of a diagnostic laboratory 8.3%, and Knott test together with the antigen test 4.7%. For D.
repens in dogs results were: diagnostic laboratory 33.8%, skin biopsy 10.8% and fresh blood smear 9.8%. The most frequently diagnostic technique for D. immitis in cats was: diagnostic laboratory 27.3%, serological test 26.9% and fresh blood smear 8.2%. For treatment of canine heartworm infection, more then 25% used ivermectin + doxycycline or melarsomin and ivermectin + doxycycline 11%; while more than 50% did not do any treatment in the cat. Prevention was started in the dog in April-May, 54.8%, while 10.3% treated for all year. Finally, more than 70% knew the American Heartworm Society (AHS),
while 69% knew the European Society of Dirofilariosis and Angiostrongylosis
(ESDA). Our data show how D. immitis and D. repens are distributed in most of the Italian provinces. Furthermore, the diagnosis is often underestimated and mainly relegated just to serology. This type of research can be a good starting point for scientific societies and to get updated risk maps
Morison inertia coefficients in orbital flow
No full textInertia coefficients for use in Morison’s equation in conditions of orbital flow are significantly lower than those appropriate to planar oscillatory flow. Circulation around the cylinder resulting from asymmetrical shedding of vorticity generates a lift which opposes the conventional inertia force. The magnitude of the lift and the effect of Reynolds number are discussed on theoretical grounds and with reference to force and velocity measurements in orbital flow. Consideration of the lift leads to the formulation of a modified Morison equation, which is appropriate to all circumstances of wave loading on a cylinder when the incident velocity vector is not collinear with the incident acceleration vector
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