5,560 research outputs found
History of the steel industry in the Port Talbot Area 1900-1988
No full textThis thesis examines the history of steelmaking at Port Talbot in South Wales from the start of modern steelmaking in 1902 to 1988. Although the British steel industry has been studied at national level, few studies have looked at company level and fewer on plant level studies. By studying this large and significant steelmaking site this thesis sheds light on the interaction between national constraints and local forces for change or inertia and on the interaction of plant management, industry leadership and national Government policies. A number of themes are examined including issues of locational inertia and change; technological innovation and choice; relationships to, and changes in markets; products and demand levels; the role of the state; and issues of decision making. The later includes managers, management structure, conflict among managers, corporate rivalries, relationships with banks and Government, and within nationalised industries.
The thesis covers the origins of modern steelmaking at Port Talbot in the 1900s, its expansion and integration with iron making during World War One. It looks at Port Talbot within the framework of heavy steel rationalisation in the 1920s and the inconclusive manoeuvrings to build a strip mill in the 1930s. After World Ward Two Port Talbot emerged as Britain’s leading strip mill through a complex interplay of technological and locational choices including Government pressure and corporate rivalries. The boom years of the 1950s were followed by consolidation and modernisation in the 1960s through the Government inspired over expansion of the strip mill sector. After re-nationalisation in 1967 Port Talbot became involved in internal struggles with rival strip mills over investment. At each stage the thesis uses the detailed local adaptation and innovation within that context.
The thesis draws on extensive primary sources including the National Archives, Government Reports and documents, company records, Bank of England papers, trade papers, technical journals, trade union papers and local newspapers. The secondary literature on the steel industry is discussed and revised where appropriate and this study adds a full-scale plant level industrial history of one of the most important British steelworks to this literature
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[A series of letters between Mrs. Elizabeth Carter and Miss Catherine Talbot]
No full textPhotograph of an 1809 edition of A series of letters between Mrs. Elizabeth Carter and Miss Catherine Talbot, from the year 1741 to 1770: to which are added, letters from Mrs. Elizabeth Carter to Mrs. Vesey, between the years 1763 and 1787; published from the original manuscripts in the possession of the Rev. Montagu Pennington, held by UNT Special Collections
[A series of letters between Mrs. Elizabeth Carter and Miss Catherine Talbot]
No full textPhotograph of an 1809 edition of A series of letters between Mrs. Elizabeth Carter and Miss Catherine Talbot, from the year 1741 to 1770: to which are added, letters from Mrs. Elizabeth Carter to Mrs. Vesey, between the years 1763 and 1787; published from the original manuscripts in the possession of the Rev. Montagu Pennington, held by UNT Special Collections
Dr. C. J. Christensen, A. L. Taylor, M. M. Boring, H. J. Hassell, R. C. Talbot, B. L. Wells, E. A. West, H. E. Callahan
No full textDr. C. J. Christensen, A. L. Taylor, M. M. Boring, H. J. Hassell, R. C. Talbot, B. L. Wells, E. A. West, H. E. Callahan at the American Society of Mechanical Engineers Conference, Salt Lake City, UT 194
Dr. C. J. Christensen, A. L. Taylor, M. M. Boring, H. J. Hassell, R. C. Talbot, B. L. Wells, E. A. West, H. E. Callahan
No full textDr. C. J. Christensen, A. L. Taylor, M. M. Boring, H. J. Hassell, R. C. Talbot, B. L. Wells, E. A. West, H. E. Callahan at the American Society of Mechanical Engineers Conference, Salt Lake City, UT 194
Oxidation of Aluminium-Magnesium alloys at elevated temperature in the solid, semi-liquid and liquid states
No full textThis thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.Sensitive thermogravimetric equipment was used to monitor the oxidation rates of A1-1 to 9% Mg alloys in 0.21 oxygen/0.79 helium mixtures with and without 0.03 atm water vapour pressure, in the temperature range 500-725°C which include their respective solid, semi-liquid and liquid states. These measurements were supported by structural and topographical studies of oxide films using SEM, X-ray diffraction, and TEM with electron diffraction and EDX techniques. The objective was to provide information in the context of dross formation during melting operations. The only oxidation product observed was MgO. The oxidation rates do not follow simple rate laws. The rate normally increases as the temperature is raised except for a curious inverse relationship for liquid alloys just above the liquidus temperatures due to the formation of undulating surfaces. An amorphous MgO film formed on liquid alloys restricted the initial oxidation but, following an incubation period, crystallisation of the film induced breakaway oxidation. The crystallisation was promoted by high magnesium contents, high temperatures and moist atmospheres. The oxidation rates for alloys in the semi-liquid state were as follows: (i) for 50% liquid, the rates were initially faster than those for wholly liquid alloys due to the presence of solid phase particles which acted both as disruptive stress-raisers and as sources of nuclei for crystallisation of the amorphous oxide film over the liquid phase. For the moist atmosphere: (i) wholly solid alloys and semi-liquid alloys with 50% liquid oxidised faster than in the dry atmosphere because of the injection of OH- ions into the oxide with consequent disruptive effects caused by hydrogen absorption by the alloy. The addition of 0.003% Be to Al-8% Mg alloy decreased the oxidation rate markedly by toughening the MgO films preventing cracking and hence the nucleation of tertiary MgO. Small additions of Mn or Zr offset the effect of Be and probably enhanced the Mg 2+ ion conductivity in the oxide by the 4+ injection of Mn 2+ , Mn 4+ or Zr ions. For alloys with Be, although breakaway eventually occurred it was not initiated by crystallisation of the amorphous film and moisture in the atmosphere increased the oxidation throughout the temperature range, 500-725°C.Financial support was provided by the
Science and Engineering Research Council (SERC), Swindon, U.K
Mary Talbot
No full textMary Marcia Talboy is pictured her junior year at Alterra High School. She is the daughter of Sterling J. and Ethel Talbot. She served in the United States Cadet Nurses Corps during World War II. She married James C. Moise. She was born June 20, 1920 and died May 30, 2013
Infections of Seriola quinqueradiata Temminck & Schlegel and S. dumerili (Risso) in Japan by Benedenia seriolae (Monogenea) confirmed by morphology and 28S ribosomal DNA analysis
No full textThe definitive version is available at www.blackwell-synergy.comI D Whittington, S Corneillie, C Talbot, J A T Morgan and R D Adlar
Efecto Talbot Unidimensional y Bidimensional
No full textIn this paper, we show some experimental results obtained by us in the summer of 2014 in IPICyT to prove the occurrence of the Talbot effect. This effect is due to the constructive interference which leads to the appearance of clear images at a certain distance behind a periodic object illuminated by a light source. The distance of appearance is known as the Talbot distance and provides the spatial scale of this self-imaging phenomenon. We used onedimensional periodic and quasi-periodic gratings as well as two-dimensional hexagonal ones which have been produced by using the Adobe Illustrator graphical program at calculated spatial frequencies that allowed the observation of the effect within the laboratory. The gratings have been illuminated with a He-Ne laser of wavelength 633 nm (red) for which we determined the distance at which a clear self-image of the gratings could be obtained.En este trabajo se muestran los resultados de los experimentos realizados en el verano del 2014 en el IPICYT, para corroborar la existencia del efecto Talbot el cual consiste en la reaparición de una imagen nítida de un objeto periódico iluminado por una fuente de luz cada cierta distancia después del objeto. Esta distancia se le conoce como distancia de Talbot y da la escala espacial de este fenómeno. Se utilizaron rejillas unidimensionales periódicas, aperiódicas y bidimensionales con estructura hexagonal, todas fueron creadas previamente con el programa grafico Adobe Illustrator con las frecuencias espaciales que se calcularon que darían una distancia de Talbot que permite la observación del efecto en el laboratorio. Las rejillas se iluminaron con un láser de He-Ne de longitud de onda de 633 nm (rojo) y posteriormente se localizó a que distancia se volvía a formar la auto-imagen de la rejilla
Analysis of a scheme for de-magnified Talbot lithography Analysis of a scheme for de-magnified Talbot lithography
No full textFormation of large-area GaN nanostructures with controlled geometry and morphology using top-down fabrication scheme J. Vac. Sci. Technol. B 30, 052202 (2012) Resist-substrate interface tailoring for generating high-density arrays of The authors describe a photolithographic scheme based on the replication of a periodic transparent mask in a photoresist utilizing the coherent self-imaging Talbot effect. A periodic two-dimensional diffractive structure (or Talbot mask) composed of unit tiles distributed in a square matrix was illuminated by a coherent extreme ultraviolet (EUV) beam from a table top EUV laser. The illumination beam was reflected in a spherical mirror and the Talbot mask was placed in the path of the convergent beam. At designed locations determined by the Talbot distance, reduced replicas of the mask were obtained and used to print the slightly de-magnified copies of the mask on the surface of a photoresist. Experimental results showing the de-magnification effect are in good agreement with the diffraction theory. The limits of the technique are discussed
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