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Common myths of six sigma demystified [PDF]
, 2008 Purpose – Six Sigma has been part of our business lexicon for more than a decade. Debates on its emergence as a strategic initiative have created critics who consider it as an old wine in a new bottle. Is Six Sigma a management fad? This article presents
Kumar, Maneesh +4 more
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The alternative sigma factor SigB of Corynebacterium glutamicum modulates global gene expression during transition from exponential growth to stationary phase [PDF]
, 2007 Larisch C, Nakunst D, Hueser AT, Tauch A, Kalinowski J. The alternative sigma factor SigB of Corynebacterium glutamicum modulates global gene expression during transition from exponential growth to stationary phase. BMC Genomics. 2007;8(1): 4.Background:
Andrea T Hüser +14 more
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Metals, 2018 Co-Re-Cr alloys are being developed for high-temperature application in gas turbines. In these alloys, the Cr2Re3-based σ phase is stable when the Cr content is higher than 20 atomic %. The addition of Ni is being studied to partially substitute Cr,
Kai Dörries +5 more
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Journal of Materials Research and Technology, 2022 The CoCrxCuFeMnNiV (x = 0, 0.25, 0.5, 0.75, 1) high-entropy alloy was prepared via vacuum arc smelting, and the effect of different Cr contents on the microstructure evolution and mechanical properties of it was evaluated.
Wen He +4 more
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Synthesis of the stationary-phase sigma factor sigma s is positively regulated by ppGpp [PDF]
Journal of Bacteriology, 1993 Strains of Escherichia coli which lack detectable guanosine 3',5'-bispyrophosphate (ppGpp) display a pleiotropic phenotype that in some respects resembles that of rpoS (katF) mutants. This led us to examine whether ppGpp is a positive regulator of sigma s synthesis.
D R, Gentry +4 more
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Microstructural Transformation in a Root Pass of Superduplex Stainless Steel Multipass Welding [PDF]
Materials Research, 2017 The microstructure of the root pass in a superduplex stainless steel multipass welding was investigated.Results showed that the welding metal has an austenite matrix with particles of sigma phase formed in the ferrite/austenite interface and ...
Doris Ivette Villalobos-Vera +1 more
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The Xi-Phase and a New Sigma Phase [PDF]
Nature, 1951 Six phases with structures isomorphous with the iron – chromium sigma phase have been reported in binary alloys of the transition elements of the first long period1–3. In addition, Goldschmidt4 has shown that the phase FeMo, stable between 1,180° and 1,540° C., has the same structure.
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Metals, 2018 An in situ scanning electron microscope (SEM) study was conducted on a super duplex stainless steel (SDSS) containing 0%, 5% and 10% σ-phase. The material was heat treated at 850 °C for 12 min and 15 min, respectively, to achieve the different ...
Christian Oen Paulsen +4 more
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Magnetism and magnetic phase diagram of sigma-phase Fe68V32 compound [PDF]
Intermetallics, 2021 Abstract The magnetic phase diagram in the H-T coordinates has been determined for σ-Fe68V32 from the ZFC/FC magnetization measurements. The re-entrant character of magnetism, going from paramagnetic through ferromagnetic to spin-glass (SG) states, has been evidenced.
Piotr Konieczny, Stanisław M. Dubiel
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An application of Six Sigma to reduce waste [PDF]
, 2005 Six Sigma has been considered a powerful business strategy that employs a well-structured continuous improvement methodology to reduce process variability and drive out waste within the business processes using effective application of statistical tools ...
Antony, Jiju
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