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  • 1
    Digitale Medien
    Digitale Medien
    Resonant modulation of single contact monolithic semiconductor lasers at millimeter wave frequencies (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 66 (1995), S. 2153-2155 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Resonant modulation of a single contact semiconductor laser at the cavity roundtrip frequency of 40 GHz is demonstrated. Efficient mode coupling is obtained with a single contact device by utilizing the high attenuation of the millimeter-wave modulation signal along the laser stripe. The properties and limitations of this technique are analyzed using a distributed circuit model of the laser. © 1995 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.113930
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  • 2
    Digitale Medien
    Digitale Medien
    On distributed microwave effects in semiconductor lasers and their practical implications (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 67 (1995), S. 467-469 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Recently, it has been shown that when a semiconductor laser is directly modulated at high frequencies, the modulation signals suffer substantial loss and phase shift propagating from the wire feed point along the length of the laser. It was suggested that these distributed microwave effects lead to a further bandwidth degradation in electrical current injection over the single-pole roll-off predicted by a lumped RC model. We show, however, that this degradation is significant only when the laser is driven directly by a voltage source. In contrast, when the laser is driven, commonly, through a 50 Ω transmission line the degradation is minimal, and the total injection current is still RC limited. © 1995 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.114538
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  • 3
    Digitale Medien
    Digitale Medien
    Laser-induced dark traces in doped LiNbO3 crystals (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 67 (1995), S. 3384-3386 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Laser-induced dark traces in doped LiNbO3 crystals are studied with the 1064 nm fundamental radiation and the 532 nm second harmonic radiation of the Nd:YAG laser operating in a pulse mode. The results show that the dark traces are induced only by the 532 nm radiation. The linear relationship between the transmission loss and the 532 nm power density indicates that dark traces are not due to two-photon absorption. The recovery rates of the absorption in LiNbO3 with different wavelength probe laser are measured and show that laser-induced dark traces accompany more than one defect appearing in LiNbO3, and disappear quicker at higher temperature. © 1995 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.114901
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  • 4
    Digitale Medien
    Digitale Medien
    A unified framework of manufacturing systems design (2001)
    Bingley : Emerald
    Industrial management & data systems 101 (2001), S. 446-469 
    Details
    ISSN: 0263-5577
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Wirtschaftswissenschaften
    Notizen: Aims to set systems thinking into the context of manufacturing systems management (MSM), which is defined as a functional domain that involves the necessary activities such as design, implementation, operations and monitoring, needed to regulate and optimise a manufacturing system as it progresses through its life cycle. Based on a number of key principles of systems theory, results from an extensive analysis of the relevant methodologies and techniques, and data gathered through industrial practice, a conceptual MSM framework is proposed. This framework specifies the key functional areas of MSM, outlines the contents and relationships within them, and then logically integrates these into a closed loop to provide the basis for the development of a set of consistent parameters and procedures. Its aim is to help achieve understanding of the problem domain, and to provide guidance for the development of effective mechanisms and tools for future MSM activities. A number of cases to illustrate its industrial application are also presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1108/02635570110410645
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  • 5
    Digitale Medien
    Digitale Medien
    Advancing theory development in total quality management: A "Deming management method" perspective (2003)
    Bingley : Emerald
    International journal of operations & production management 23 (2003), S. 918-936 
    Details
    ISSN: 0144-3577
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Wirtschaftswissenschaften
    Notizen: The Deming management method, which encompasses the breadth of W. Edwards Deming's approach to quality management, has had significant impact on the practice and scholarship of quality management. In this paper we present a scholarly introspection and discussion on scientific research related to the Deming management method, the contributions of such research to theory development in quality management, and future research directions to pursue in order to continue to advance scientific knowledge in quality management. In doing so, we traced the historical development of the Deming management method. We present and discuss two streams of research related to the Deming management method, namely the concept of profound knowledge and the Deming-based theory of TQM. We also highlight several opportunities for future research that would advance theory development in the TQM discipline - opportunities anchored by the imperative for confirmatory research that requires proper operationalization and primary data, and the plausibility of theory refinement and extension through the specification of new relationships and the inclusion of moderators and mediators.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1108/01443570310486356
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  • 6
    Digitale Medien
    Digitale Medien
    Germination of the seeds and growth of the seedlings of Cinnamomum camphora (L.) Presl. (2004)
    Melbourne, Australia : Blackwell Science Pty
    Plant species biology 19 (2004), S. 0 
    Details
    ISSN: 1442-1984
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1442-1984.2004.00100.x
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  • 7
    Digitale Medien
    Digitale Medien
    Aquatris(1,10-phenanthroline)(trans-2,3-dimethylacrylato)ytterbium(III) (2000)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. 316-318 
    Details
    ISSN: 1600-5759
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Chemie und Pharmazie , Geologie und Paläontologie , Physik
    Notizen: The title mononuclear complex, [Yb(C5H7O2)3(C12H8N2)(H2O)], is a most uncommon carboxylate complex of a rare earth metal. Each YbIII ion is eightfold coordinated, being bonded to five O atoms of three dimethylacrylate groups, both N atoms of a phenanthroline and one O atom of a water molecule, giving a distorted square antiprismatic coordination polyhedron.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0108270199016169
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  • 8
    Digitale Medien
    Digitale Medien
    An anthropocentric approach to knowledge-based preventive maintenance (1994)
    Springer
    Journal of intelligent manufacturing 5 (1994), S. 389-397 
    Details
    ISSN: 1572-8145
    Schlagwort(e): Preventive maintenance ; JIT ; human-centred approach ; RCM
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: It is common knowledge today that application of sound manufacturing concepts and techniques will only provide cost-effective, long-term return when manufacturing functions are totally integrated with the operators, maintenance engineers and other associated personnel. This paper presents a human-centred methodology and its associated knowledge-based tool, to utilize equipment failure information for the purpose of machine down-time minimization. Based upon a structured and rigorous assessment of each breakdown, and combined with total employee participation, continuous improvement of maintenance function and operational effectiveness of equipment can be made a reality.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00123658
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  • 9
    Digitale Medien
    Digitale Medien
    Synthesis, Characterization, and Hydrolytic Degradation of Copolymers of 2-Methylene-1,3-dioxepane with Ethylene and with Styrene (1998)
    Springer
    Journal of polymers and the environment 6 (1998), S. 23-29 
    Details
    ISSN: 1572-8900
    Schlagwort(e): Polyethylene ; polystyrene ; biodegradation ; copolymerization ; hydrolytic degradation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Energietechnik , Maschinenbau
    Notizen: Abstract 2-Methylene-1,3-dioxepane (MDP) was copolymerized with ethylene (E) at a pressure of approximately 1000 psi and a temperature of approximately 70°C with AIBN as the free radical initiator. The copolymers obtained, poly(MDP-co-E), were characterized by elemental analysis, IR, 1H-NMR and 13C-NMR spectroscopy, DSC, and GPC. The copolymers contained 2–15 mol% ester units. MDP was also copolymerized with styrene (S) at 120°C with di-t-butyl peroxide as the initiator to prepare the copolymer, poly(MDP-co-S). The number-average molecular weights of both types of copolymers were in the range of 6000 to 11,000, and the weight-average molecular weights were in the range of 9000 to 17,000. The melting temperatures of poly(MDP-co-E) decreased with increasing ester unit content in the copolymer. For the MDP-S copolymers, the glass transition temperatures decreased with increasing ester unit content. Both poly(MDP-co-E) and poly(MDP-co-S) were degraded by methanolysis, and their molecular weights decreased by the expected amounts based on the ester unit content.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1022874411834
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  • 10
    Digitale Medien
    Digitale Medien
    Terbium and holmium trans-2,3-dimethylacrylic acid complexes with 1,10-phenanthroline (2000)
    Springer
    Journal of chemical crystallography 30 (2000), S. 777-782 
    Details
    ISSN: 1572-8854
    Schlagwort(e): terbium complex ; holmium complex ; crystal structure ; trans-2,3-dimethylacrylic acid
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract Novel dinuclear complexes, [REL3(phen)]2 (where RE = Tb, Ho; HL = trans-2,3-dimethylacrylic acid; phen = 1,10-phenantheoline), were synthesized and determined by elemental analysis, infrared absorption spectra (IR), thermogravimetric analysis (TGA), and X-ray diffraction. The Tb complex crystallizes in space group P21/n with the cell dimensions a = 12.939(2) Å, b = 13.018(2) Å, c = 15.400(3) Å and β = 94.72(1)°. The Ho complex crystallizes in P (9) with a = 12.406(3) Å, b = 13.280(3) Å, c = 9.823(2) Å, α = 110.80(2)°, β = 103.42(2)°, γ = 63.67(1)°. The Tb atom is nine coordinate and the separation of Tb...Tb* is 3.97 Å. The Ho atom is eight coordinate and the separation of Ho...Ho* is 4.01 Å.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1013220207596
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