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1

Digitale Medien

Brilliance and flux reduction in imperfect inclined crystals : The 9th National conference on synchrotron radiation instrumentation (1996)

Lee, W.K. ; Blasdell, R.C. ; Fernandez, P.B. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 67 (1996), S. 3353-3353

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ISSN: 1089-7623

Quelle: AIP Digital Archive

Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: The inclined crystal geometry has been suggested as a method of reducing the surface absorbed power density of high-heat-load monochromators for third-generation synchrotron radiation sources. Computer simulations have shown that if the crystals are perfectly aligned and have no strains then the diffraction properties of a pair of inclined crystals are very similar to a pair of conventional flat crystals with only subtle effects differentiating the two configurations. However, if the crystals are strained, these subtle differences in the behavior of inclined crystals can result in large beam divergences causing brilliance and flux losses. In this manuscript, we elaborate on these issues and estimate potential brilliance and flux density losses from strained inclined crystals at the APS. © 1996 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1146915

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2

Digitale Medien

Spatial imaging of monochromatic hard x-rays from an APS undulator by the Kohzu double-crystal monochromator : The 9th National conference on synchrotron radiation instrumentation (1996)

Mills, D.M. ; Lee, W.K. ; Keeffe, M. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 67 (1996), S. 3348-3348

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ISSN: 1089-7623

Quelle: AIP Digital Archive

Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: The spatial distribution of monochromatic x-rays produced by an APS undulator was imaged on a fluorescent screen and recorded with a video camera while commissioning the Kohzu double-crystal monochromator (DCM). Two sets of images were recorded: Case 1 in which the spectral output of the undulator is fixed (constant magnetic gap) and the monochromator is scanned in energy, and Case 2 in which the monochromator energy is held fixed and the spectral output of the undulator is varied by changing the magnetic gap of the insertion device. Because of the performance of the Kohzu monochromator, the mechanical conditions required to maintain the twice-diffracted beam could be preserved as the DCM was scanned in energy, allowing the evolution as a function of energy. The images are compared with the calculated spatial distributions of monochromatic undulator radiation. © 1996 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1147263

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3

Digitale Medien

An EMS approach to environmentally-friendly construction operations (2001)

Pun, K.F. ; Hui, I.K. ; Lee, W.K.

Bradford : Emerald

The @TQM magazine 13 (2001), S. 112-119

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ISSN: 0954-478X

Quelle: Emerald Fulltext Archive Database 1994-2005

Thema: Wirtschaftswissenschaften

Notizen: The increasing consciousness of environmental protection has fostered the development of environmental management systems (EMS). ISO 14001 is an international standard that provides guidance for the establishment and monitoring of EMS implementation. Investigates the development of environmentally-friendly construction operations based on a recent study in Hong Kong. Contributes to identifying the elements and processes of EMS implementation, and explaining the procedural guideline of a seven-step EMS approach in managing construction practice. Incorporating the compliance requirements of ISO 14001, the approach addresses the policy, the implementation and monitoring, and continuous improvement of construction operations. The tangible and intangible benefits of the approach are also discussed with reference to the experiences of the Housing Department in Hong Kong. The approach may also be useful for construction practitioners to manage the EMS processes and assess their environmental performance towards continuous improvement.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1108/09544780110366024

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4

Digitale Medien

Development of a carrier for adhesion of nitrifying bacteria using a thermodynamic approach (1997)

Kim, Y.H. ; Cho, J.H. ; Lee, Y.W. ; [weitere]

Springer

Biotechnology techniques 11 (1997), S. 773-776

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ISSN: 1573-6784

Quelle: Springer Online Journal Archives 1860-2000

Thema: Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: Abstract Biopop, a novel modified cellulose carrier for nitrification was developed through thermodynamic analysis of carrier materials. By measuring contact angles among nitrifying bacteria, solid carrier and broth, the change in free energy of adhesion of nitrifying bacteria on carrier (δG) was calculated. Cellulose gave the most favorable free energy change for adhesion of nitrifying bacteria and all the inoculated microbes were attached on porous carrier made of cellulose within 1 day. The new carrier gave a nitrification rate (800 g N-NH /m day), which was about four times higher than other carriers made of synthetic polymers such as polyurethane or rubber.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1018460805328

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