1,872 research outputs found
Phaon H. Bates
No full textPhaon H. Bates
NBS/NIST: 1910-1945
Birth: 1 August 1879; Somerset County, Pennsylvania
EDUCATION:
University of Pennsylvania, BS (Chemistry), 1902
PRINCIPAL FIELDS:
Structural and ceramic materials, intelligent use of cement and concretes, cement hydration
POSITIONS HELD AT NBS:
Chemist, 1910-1923
Chief, Structural and Miscellaneous Materials Division, 1923-1933 Chief, Clay and Silicate Products Division, 1933-1945
HONORS:
Pan Pacific Exposition Silver Medal (1915)
Henry C. Turner Medal of the American Concrete Institute (1939) Honorary Member ASTM Committee C-1 (1950)
Honorary Member ACI (1966) Sigma Xi
MEMBERSHIPS:
American Concrete Institute, President (1934-1936)
American Society for Testing and Materials, President (1944-1945), Chair Committee C-1 (1926-1942) Fellow, American Association for the Advancement of Science
Fellow, Washington Academy of Science Fellow, American Ceramic Society American Chemical Society
Consulting Board on Concrete for Boulder Dam, Chairman
PUBLICATIONS:
More than 40 publications including:
Bates, P.H. and Klein, A. A., ""Properties of the Calcium Silicates and Calcium Aluminates Occurring in Normal Portland Cement,"" Technologic Papers of the Bureau of Standards, No. 78, 38 pp, (June 9, 1917).
Bates, P.H., ""The Application of the Fundamental Knowledge of Portland Cement to its Manufacture and Use,"" Journal of the Franklin Institute, 289-309 (March 1922).
Bates, P.H., ""Portland Cement Today and 20 Years Ago,"" Engineering-News Record, vol. 110, no.16, 492-494 (April 1933).
Bates, P.H., ""Portland Cement-Theories (Proven and Otherwise) and Specifications,"" ASTM Proceedings, vol. 40, 469-500 (1940), Fifteenth Edgar Marburger Lecture Series
Stereoscopic PIV measurement in laminar rotating plane Couette flow
No full textPlane Couette flow with spanwise system rotation shows structures of streamwise-oriented roll cells that arise due to the instability by the Coriolis force when the system rotation is in the opposite direction to the mean flow vorticity. The momentum transport caused by such roll cell structures makes the flow tend to exhibit zero absolute vorticity. In the present study, stereoscopic PIV measurements in the rotating plane Couette flow were carried out in order to further illuminate the vortex structures and transport phenomena in this flow. The Reynolds stresses and some terms of its transport equation were evaluated to discuss the transport phenomena caused by the coherent structure. Furthermore, the wall shear stress was evaluated based on the measurement results of the Reynolds and viscous shear stresses and its variation with the system rotation rate is also presented
Generalized diagnostic scaling for high-order moments in turbulent boundary layers
No full textThe present work builds upon the diagnostic plot for the streamwise turbulence intensity [Alfredsson & Örlü, 2010] and generalises it for higher-order (even and odd) moments providing a general description of the probability density distribution of streamwise velocity fluctuations. Turbulent boundary layers (up to a friction Reynolds number of 20'000) are employed and demonstrate its feasibility to scale data throughout the overlap and outer region
PV architectures for DC microgrids using buck or boost exclusive microconverters
No full textDC microgrids can connect directly dc renewable energy sources with increasing amount of dc loads. In this paper it is looked for possible architectures for integrating PV panels into dc microgrids, by means of microconverter strings. Three topologies are considered, featuring only buck microconverters and only boost microconverters, since they promise higher efficiency due to fewer semiconductors in the current path. The topologies under exam are tested with a perturb and observe MPPT, in the cases of abrupt local shading and uneven shading over a solar panels' array. Among the three, the best topology by response time and control ease is found.Accepted Author ManuscriptOld - EWI-ESE-DC&S DC systems & StorageElectrical Power Processin
Matching PV array output with residential load by optimisation of array orientation
No full textCurrently PV modules are positioned to receive the highest amount of incident radiation in a year. Therefore, the generation pattern is independent of the consumption and a large storage is required to compensate for the same. This paper studies the possibility of orienting the modules differently in order to match the consumption more efficiently.Accepted Author ManuscriptOld - EWI-ESE-DC&S DC systems & Storag
A geologic traverse within the eastern edge of the Medial New England Terrane
No full textGuidebook for field trips in southwestern Maine: New England Intercollegiate Geological Conference, 78th annual meeting, Bates College, Lewiston, Maine, October 17, 18, and 19, 1986: Trip C-
Automatic texture segmentation for content-based image retrieval application
No full textIn this article, a brief review on texture segmentation is presented, before a novel automatic texture segmentation algorithm is developed. The algorithm is based on a modified discrete wavelet frames and the mean shift algorithm. The proposed technique is tested on a range of textured images including composite texture images, synthetic texture images, real scene images as well as our main source of images, the museum images of various kinds. An extension to the automatic texture segmentation, a texture identifier is also introduced for integration into a retrieval system, providing an excellent approach to content-based image retrieval using texture features
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