Search Results - (Author, Cooperation:L. S. Teh)
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1Latest Papers from Table of Contents or Articles in PressD. P. Tittensor ; M. Walpole ; S. L. Hill ; D. G. Boyce ; G. L. Britten ; N. D. Burgess ; S. H. Butchart ; P. W. Leadley ; E. C. Regan ; R. Alkemade ; R. Baumung ; C. Bellard ; L. Bouwman ; N. J. Bowles-Newark ; A. M. Chenery ; W. W. Cheung ; V. Christensen ; H. D. Cooper ; A. R. Crowther ; M. J. Dixon ; A. Galli ; V. Gaveau ; R. D. Gregory ; N. L. Gutierrez ; T. L. Hirsch ; R. Hoft ; S. R. Januchowski-Hartley ; M. Karmann ; C. B. Krug ; F. J. Leverington ; J. Loh ; R. K. Lojenga ; K. Malsch ; A. Marques ; D. H. Morgan ; P. J. Mumby ; T. Newbold ; K. Noonan-Mooney ; S. N. Pagad ; B. C. Parks ; H. M. Pereira ; T. Robertson ; C. Rondinini ; L. Santini ; J. P. Scharlemann ; S. Schindler ; U. R. Sumaila ; L. S. Teh ; J. van Kolck ; P. Visconti ; Y. Ye
American Association for the Advancement of Science (AAAS)
Published 2014Staff ViewPublication Date: 2014-10-04Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: *Biodiversity ; *Conservation of Natural Resources ; *Extinction, BiologicalPublished by: -
2Articles: DFG German National LicensesStaff View
ISSN: 1750-3841Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionProcess Engineering, Biotechnology, Nutrition TechnologyNotes: Anthocyanins from two sources with reported high stability, Ipomoea tricolor and Zebrina pendula, were compared with extracts from blackberries containing mainly cyanidin-3-glucoside (Cn-3-G) and a commercial enocyanin. The pigment samples were formulated in a sugar, citrate-phosphate buffer solution for storage at room temperature. Tristimulus color data and pigment retention were measured at periods up to 82 weeks. The Ipomoea pigments were the most stable. Zebrina and Cn-3-G samples were similar followed by enocyanin. Deacylated pigments from both Ipomoea and Zebrina were the least stable indicating that the acyl groups conferred stability.Type of Medium: Electronic ResourceURL: -
3Articles: DFG German National LicensesTEH, L. S. ; BRENNAN, F. P.
PO Box 1354, 9600 Garsington Road, Oxford OX4 2XG, UK. : Blackwell Science Ltd
Published 2005Staff ViewISSN: 1460-2695Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsNotes: This paper presents stress intensity factor (SIF) solutions for edge cracks emanating from semicircular notches using the composition of SIF weight functions. The method isolates and combines the geometrical influences defined by constitutive SIF weight functions to yield SIFs for semicircular notches in finite thickness bodies. Finite element analysis was employed to obtain the required stress distributions and to generate reference constitutive SIFs. Problems encountered with curve fitting high gradient stress distributions were addressed and a robust mathematical solution for these was formulated. The new SIF solutions were verified by comparison with published solutions showing a high degree of accuracy and reliability. The composition model was demonstrated to allow rapid generation of SIFs for mode I cracks in complex geometries where the relevant simple constitutive solutions are available. These new solutions expressed as SIF weight functions allow interpolation between the geometrical parameters for which they are valid and also to include the effect of complex stress distributions such as those due to residual stresses.Type of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesBRENNAN, F. P. ; TEH, L. S.
PO Box 1354, 9600 Garsington Road, Oxford OX4 2XG, UK. : Blackwell Science Ltd
Published 2004Staff ViewISSN: 1460-2695Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsNotes: Linear elastic fracture mechanics (LEFM) is the science frequently used to understand the stable and progressive fatigue crack growth that often occurs in engineering components under varying applied stress. The stress intensity factor (SIF) is its basis and describes the stress state at the crack tip. This can be used with the appropriate material properties to calculate the rate at which the crack will propagate in a linear elastic manner. Unfortunately, the SIF is difficult to compute or measure, particularly if the crack is situated in a complex three-dimensional geometry or subjected to a non-simple stress state. This is because the SIF is not only a function of the crack and component geometry but is also dependent on the applied stress field. In the last 20 years, the SIF weight function has gained prominence as a method for calculating and presenting SIFs independent of applied stress. This paper demonstrates that the real promise of the SIF weight Function lies in its use to rapidly generate SIF solutions for cracks in complex geometries by simple composition of geometric influences from reference constituent solutions.Type of Medium: Electronic ResourceURL: