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  • 1
    Electronic Resource
    Electronic Resource
    Structural basis for self-association and receptor recognition of human TRAF2 (1999)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 398 (1999), S. 533-538 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Tumour necrosis factor (TNF)-receptor-associated factors (TRAFs) form a family of cytoplasmic adapter proteins that mediate signal transduction from many members of the TNF-receptor superfamily and the interleukin-1 receptor. They are important in the regulation of cell survival and cell death. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/19110
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  • 2
    Electronic Resource
    Electronic Resource
    A heuristic file reorganization algorithm based on record clustering (1989)
    Springer
    BIT 29 (1989), S. 428-447 
    Details
    ISSN: 1572-9125
    Keywords: H.0 ; H.2.2 ; H.3.3
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract The problem of file organization which we consider involves altering the placement of records on pages of a secondary storage device. In addition, we want this reorganization to be done in-place, i.e., using the file's original storage space for the newly reorganized file. The motivation for such a physical change is to improve the database system's performance. For example, by placing frequently and jointly accessed records on the same page or pages, we can try to minimize the number of page accesses made in answering a set of queeries. The optimal assignment (or reassignment) of records to clusters is exactly what record clustering algorithms attempt to do. However, record clustering algorithms usually do not solve the entire problem, i.e., they do not specify how to efficiently reorganize the file to reflect the clustering assignment which they determine. Our algorithm is a companion to general record clustering algorithms since it actually transforms the file. The problem of optimal file reorganization isNP-hard. Consequently, our reorganization algorithm is based on heuristics. The algorithm's time and space requirements are reasonable and its solution is near optimal. In addition, the reorganization problem which we consider in this paper is similar to the problem of join processing when indexes are used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02219229
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  • 3
    Electronic Resource
    Electronic Resource
    A study on MicroCantilever Deflection for the Infrared Image Sensor using Bimetal Structure (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 345-346 (Aug. 2007), p. 785-788 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This is a widespread requirement for low cost lightweight thermal imaging sensors forboth military and civilian applications. The feasibility of micromechanical optical and infrared (IR)detection using microcantilevers is demonstrated. Microcantilevers provide a simple Structurefordeveloping single- and multi-element sensors for visible and infrared radiation that are smaller,more sensitive and lower in cost than quantum or thermal detectors. Microcantilevers coated with aheat absorbing layer undergo bending due to the differential stress originating from the bimetalliceffect. This paper reports a micromachined silicon uncooled thermal imager intended forapplications in automated process control
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.345-346.785.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Optimization of a Gate Valve Using Orthogonal Array and Kriging Model (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 345-346 (Aug. 2007), p. 901-904 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The optimization of gate valve was performed using Kriging based approximation model.The DACE modeling, known as the one of Kriging interpolation, is introduced to obtain thesurrogate approximation model of the function. In addition, we describe the definition, theprediction function and the algorithm of Kriging method and examine the accuracy of Kriging byusing validation method
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.345-346.901.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Shape Optimization of a Knuckle using the Design of Experiments (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 345-346 (Aug. 2007), p. 905-908 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: DOE (design of experiments) was applied to the design of a knuckle as a part of asuspension system. Specifically, knuckle made of aluminum alloy was optimized considering thestrength. On the other hand, design variables were set as shape variables. During structuraloptimization using DOE, an orthogonal array strategy was developed to determine the optimumdesign. The relevant discrete variables were treated as levels. Since the conventional orthogonalarray did not consider the constraint, however, the characteristic function was defined to include theeffect of constraint feasibility. The general DOE was expanded to include problems with constraintsrelated to the new characteristic function
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.345-346.905.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Propagation Characteristic of Elastic Wave in Pipe (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 345-346 (Aug. 2007), p. 1323-1326 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this study, elastic waves of ultrasonic and acoustic emission were used to evaluate thepropagation characteristic of the wave in pipe, and study on mode conversion of the elastic wavedue to the cracks in the pipe was also performed. An acoustic emission (AE) sensor was used toreceive the propagated ultrasonic wave. AE technique has a merit that it can identify the receivedultrasonic wave by the analysis of the AE parameters such as count, energy, frequency, durationtime and amplitude. For transmitting and receiving of the wave, a wedge for universal angle wasmanufactured. The optimum angles for transmitting of ultrasonic wave and signal receiving at theattached AE sensor on the pipe were determined. Theoretical dispersion curve was compared withthe results of the time-frequency analysis based on the wavelet transformation. The received modesshowed a good agreement with theoretical one. The used ultrasonic sensor was 1MHz, and AEsensor was broadband (100kHz – 1200kHz). The artificial cracks were induced in the pipe tomeasure the propagation characteristics of the elastic wave for the cracks. AE parameters for thereceived signals were also varied with the crack types in the pipe. AE parameters of amplitude andduration time were more effective factors than the analysis of mode conversion for evaluation of thecracks in the pipe
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.345-346.1323.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Phase Changes in AISI 436L Ferritic Stainless Steel after Nitrogen Permeation Heat Treatment (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 26-28 (Oct. 2007), p. 1303-1306 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This study examined the phase changes, nitride precipitation and variations in hardnessof Fe-18Cr-1Mo-0.2Ti (436L) ferritic stainless steels after a nitrogen permeation heat treatment attemperatures ranging from 1050°C to 1150°C. The strong affinity between nitrogen and Ti/Crenabled the permeation of nitrogen into the 436L ferritic stainless steels. The nitrogen content of thesurface layers ranged from 0.40% to 0.87%, depending on the nitrogen permeation temperatures.The nitrogen-permeated surface layers changed into martensite plus retained austenite(RA) with rodtype M2N and square type TiN precipitates. Ups and downs of hardness with increasing depthbelow the surface was observed, depending on the volume fraction of the RA, nitrogen content andquantity of precipitates. The maximum hardness of the nitrogen permeated surface layer was 700Hv
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.1303.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Optimization of Preform in Forging Process Using Kriging Model (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 26-28 (Oct. 2007), p. 977-980 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The welding process, a conventional production method of gate valves, has advantagessuch as light weight, but it also has disadvantages such high production price. However, the forgingprocess, has economic merits and mass production capability. The main focus of this paper is theoptimization of the preform in the forging process. This paper proposes an optimal design of thepreform to improve the mechanical efficiency of the gate valve made by the forging method. Thedesign of the preform is optimized by the use of the real response model to the Kriging model bycomputer simulation. Also, the optimized results were used to verify the response model. Theverified response model confirmed the usefulness and reliability of the Kriging method in optimumstructural design of preform achieved by finite element analysis and Kriging equations
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.977.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    A Study on Fatigue Properties of a TiNi/Al Shape Memory Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 26-28 (Oct. 2007), p. 309-312 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Shape memory alloy (SMA) has been used to improve the tensile strength of compositematerials. Because it produces compressive residual stress in the matrix by using its shape memoryeffect. In order to fabricate a shape memory alloy composite, TiNi alloy and Al2024, Al6061 wereused as reinforcing material and matrix, respectively. In this study, TiNi/Al2024 and TiNi/Al6061shape memory alloy composites were made by the hot press method. The fatigue limit of a shapememory alloy composite determined the volume ratio and reduction ratio. The probabilistic stresslifecurve (P-S-N curve) about the shape memory alloy composite makes up using statisticalmethod
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.309.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Nondestructive Evaluation and Fracture Mechanism of Smart Material (2004)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 261-263 (Apr. 2004), p. 1379-1384 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Tensile residual stress occurring due to the difference of coefficients of thermal expansion between fiber and matrix is one of the serious problems in metal matrix composites (MMC). In this study, TiNi alloy fiber was used to solve the problem of the tensile residual stress of TiNi/Al6061 shape memory alloy(SMA) composite as the reinforced material. TiNi alloy fiber improves the tensile strength of a composite by inducing compressive residual stress in the matrix using its shape memory effect. The fixture was made to hold TiNi shape memory fiber uniformly. Some tensile testspecimens with several volume fractions are made by the hot pressing method under the optimum processing condition. In order to generate the compressive residual stress in TiNi/Al6061 SMA composite, 1%, 3% and 5% pre-strain was added in advance. It was evaluated the effect of compressive residual stress corresponding to pre-strains variation using the acoustic emission(AE)technique. AE technique was also used to clarify the damage behavior and the microscopic failure mechanism of TiNi/Al6061 SMA composite. In addition, a two-dimensional AE source location technique was applied to measure the position of the crack initiation and propagation in composites
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/47/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.261-263.1379.pdf
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