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  • 2005-2009  (132)
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  • 1
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    Synoptic circulation changes over Central Europe from 1900 to 2100: Reanalyses and Coupled Model Intercomparison Project phase 6 (2021)
    John Wiley & Sons, Ltd. | Chichester, UK
    Details
    Publication Date: 2022-09-27
    Description: While the evidence for anthropogenic climate change continues to strengthen, and concerns about severe weather events are increasing, global projections of regional climate change are still uncertain due to model‐dependent changes in large‐scale atmospheric circulation, including over North Atlantic and Europe. Here, the Jenkinson–Collison classification of daily circulation patterns is used to evaluate past and future changes in their seasonal frequencies over Central Europe for the 1900–2100 period. Three reanalyses and eight global climate models from the Coupled Model Intercomparison Project phase 6, were used based on daily mean sea‐level pressure data. Best agreement in deriving relative frequencies of the synoptic types was found between the reanalyses. Global models can generally capture the interannual variability of circulation patterns and their climatological state, especially for the less frequent synoptic types. Based on historical data and the shared socioeconomic pathway 5 scenario, the evaluated trends show more robust signals during summer, given their lesser internal variability. Increasing frequencies were found for circulation types characterized by weak pressure gradients, mainly at the expense of decreasing frequencies of westerlies. Our findings indicate that given a high‐emission scenario, these signals will likely emerge from past climate variability towards the mid‐21st century for most altered circulation patterns.
    Description: Daily synoptic circulation patterns are derived using the Jenkinson–Collinson automated classification over Central Europe to evaluate past and future changes in their temporal frequencies. Reanalyses and eight global climate models from the CMIP6 were used based on the historical experiment and a high‐emission scenario. More robust signals were found during the summer season leading to emerging changes towards the mid‐21st century.
    Description: H2020 Marie Skłodowska‐Curie Actions http://dx.doi.org/10.13039/100010665
    Description: EU International Training Network (ITN) Climate Advanced Forecasting of sub‐seasonal Extremes (CAFE)
    Keywords: ddc:551.6
    Language: English
    Type: doc-type:article
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    CITATION GEO-LEO
  • 2
    Electronic Resource
    Electronic Resource
    The Effect of Fiber Winding Angles on the Bending Strength of Fiber-Reinforced Plastic Rods (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 345-346 (Aug. 2007), p. 661-664 
    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: Fiber-reinforced plastics consist of fibers of high strength and modulus embedded in, orbonded to a matrix with distinct interfaces between them. Because fiber configuration plays a key rolein determining mechanical strength of fiber-reinforced plastic rods, especially bending strength offiber-reinforced plastic rods was measured and simulated numerically in variation with windingangles. Also, stress distribution in fiber-reinforced plastic rods was simulated numerically under thecondition of constant bending load to fiber-reinforced plastic rods. The measured bending strength offiber-reinforced plastic rods in variation with winding angles was different from that of simulated.The difference between measured and simulated results was due to the effect of shear stresses on thestrength of fiber-reinforced plastic rods
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.345-346.661.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of Dispersant on the Particle Size Distribution of Cu Powders Prepared by Wet-Reduction Process (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 2118-2121 
    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: Monodispersed Cu powders were prepared in aqueous solution through a wet-reductionprocess with hydrazine hydrate (N2H4·H2O). In particular, the effect of the dispersant such as sodiumpyrophosphate decahydrate (Na4O7P2·10H2O), carboxymethyl cellulose sodium salt (CMC) in watersolvent on the particle size for the prepared Cu powders was investigated. The Cu powders essentiallywere monodispersed and irregular in shape regardless of reaction temperature and dispersant. In the caseof adding the Na4O7P2·10H2O, the particle size of Cu powders increased with the increase of reactiontemperature, which the particles were agglomerated in irregular shape and became to be large. Theparticle size distributions was asymmetry and to be broad regardless of reaction temperature. On the otherhand, when the CMC was added, the particle size of Cu powders, which were much finer compared withadding the Na4O7P2·10H2O as a dispersant, was not much changed with reaction temperature. The particlesize distribution of Cu powder was much narrow regardless of reaction temperature. As a result, it wouldbe suggested that the CMC was more effective dispersant reagent to produce the monodispersed and fineCu powders with narrow size distribution using the wet chemical reduction process
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.2118.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Properties of Sol-Gel Coating Film from Colloidal Silica-Silane Sol (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 544-545 (May 2007), p. 813-816 
    Details
    ISSN: 1662-9752
    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: Two kinds of colloidal silica(CS)/silane sol solutions were prepared. Two sol solutions areinvolved with the kinds of silane such as methyltrimethoxysilane(MTMS) and [removed info] -Glycidoxypropyltrimethoxysilane(ETMS) using LS CS. MTMS was added to two sol solutions. Whether ETMS wasadded or not, two kinds of sol solutions were synthesized. Using two kinds of sol solutions, sol-gelcoating films were formed on glass substrates via dip-coating process. Here, seasoning effect of forenhancing properties of sol-gel coating layer on glass was investigated while such sol-gel solutionswere left for 7days. Also, their properties such as surface free energy, roughness, thermal property,potential hardness and elastic portion were characterized in order to understand the effect of additionof ETMS. In this case of LS/MTMS sol, the coating film had low surface free energy and moreenhanced flat surface than that of the case of LS/MTMS/ETMS sol. ETMS forms hydrophilichydroxyl group in sol solution, then surface free energy of LS/MTMS/ETMS coating film increased.In the beginning of reaction sol solution seemed to be unstable, but 4days later their coating filmproperties such as surface free energy and roughness enhanced. The elastic portion of coating filmsobtained from LS/MTMS/ETMS sol increased with addition of ETMS, but thermal stabilitydecreased
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.544-545.813.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Properties of Coating Films Synthesized from Colloidal Silica and Methyltrimethoxysilane (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 544-545 (May 2007), p. 1037-1040 
    Details
    ISSN: 1662-9752
    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: Colloidal silica/methyltrimethoxysilane (MTMS) sol solutions were prepared in variationwith the ratio of MTMS to colloidal silica. Sol solutions were prepared by sol-gel reaction. Tounderstand their physical and chemical properties, dip coating of sol solutions was performed on theglass substrates. The state of coating films was investigated in variation with the amount of MTMSand reaction time. The contact angle and thickness of coating films increased with an increasingamount of MTMS. The surface roughness of coating films decreased with an increasing amount ofMTMS. Coating films were stable until 550°C. Thermal degradation temperature of coating filmsdecreased with an increasing amount of MTMS
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.544-545.1037.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Properties of Coating Films Synthesized from Nano Colloidal Silica and Alkoxy Silanes (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 510-511 (Mar. 2006), p. 222-225 
    Details
    ISSN: 1662-9752
    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: Colloidal silica/silane sol solutions were prepared in variation with the ratio of silane tocolloidal silica. Such sol solutions were synthesized from colloidal silica/tetramethoxysilane (TMOS)/methyltrimethoxysilane(MTMS). Sol solutions were prepared by sol-gel reaction through two step reactions. To understand their physical and chemical properties, dip coating of sol solutionswas performed on the glass substrates. Contact angle and thickness of coating films increased with increasing the amount of MTMS. The surface free energy of coating films decreased with increasing amount of MTMS. Coating films were stable until 550℃. Thermal degradation temperature of coating films decreased with increasing amount of MTMS. Plastic hardness decreased with increasing amount of MTMS. Elastic portion increased with increasing amount of MTMS
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/12/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.510-511.222.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Characteristics of Thin Film of Nano-Hybrid Synthesized from Acrylic Resin and Colloidal Silca-Silane Sol (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 510-511 (Mar. 2006), p. 218-221 
    Details
    ISSN: 1662-9752
    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: Organic-inorganic hybrid blends were prepared in variation with the ratio of sol solution to urethaneacrylic resin. Such sol solutions were synthesized from colloidal silica (CS)/ methyltrimethoxysilane(MTMS)/vinyltrimethoxysilane(VTMS) by sol-gel reaction through two step reactions. Thin films of organic-inorganic hybrid blends were prepared using spin coater on the glass and aluminum sheets. In order to understand surface properties of thin films, contact angle androughness were measured. Surface contact angle and roughness of thin films increased as the amount of sol solution increased. Thermal dissociation temperature of thin films was observed using TGA. Thin films were stable until 270 oC. Thermal dissociation temperature of thin films improved with increasing sol solution. In order to observe insulation property of thin films, electrical resistance measurements were performed. Surface and volume resistance of thin films increased as the amount of sol solution increased
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/12/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.510-511.218.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Hydrothermal Syntheses of Nickel Nanosheets and Their Morphology (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 510-511 (Mar. 2006), p. 706-709 
    Details
    ISSN: 1662-9752
    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: Nanocrystalline nickel powders were prepared by chemical reduction of nickel chloride hydrate with different surfactant at moderate temperature in a pressurized vessel. Nickel nanosheets were generated successfully through reducing the nickel ion complexes, formed by sodium tartrate, at alkaline condition by hydrazine hydrate. The nanosheets and nanowires were characterized by the means of an X-ray diffractomer (XRD), a field emission scanning electron microscopy (FESEM), an energy dispersive X-ray spectrometer (EDS) and a high sensitivemagnetometer (HSM)
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/12/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.510-511.706.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Properties of Nano-Hybrid Sol-Gel Coating Films Synthesized with Colloidal Silica and Organoalkoxy Silanes (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 569 (Jan. 2008), p. 69-72 
    Details
    ISSN: 1662-9752
    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: Three kinds of colloidal silica (CS)/silane sol were prepared. Sols are involved with thekinds of silane with different organic group. Methyltrimethoxysilane (MTMS) has the three methoxygroups and a methyl group. γ-Glycidoxypropyltrimethoxysilane (GTMS) has the three methoxygroups and a bulky epoxy group. GTMS was added to two sols with different amount. When solreacted for 10 days, viscosity increased dramatically. Trasnmittance of sols reacted for 10 daysdecreased rapidly, too. It indicated the stability of sol degraded. Sol-gel coating films were formed onglass substrate using spin coating procedure with reaction time for 10 days. Coating films were flatand transparent without cracking. CS/MTMS coating films showed high contact angle. When largeamount of GTMS was added, contact angle decreased due to its epoxy group. No thermal degradationof CS/MTMS coating film occurred up to 600 oC. CS/MTMS/GTMS coating film degraded at 400 oCfor decomposition of epoxy group which has long organic chain which easily degraded by the thermalshock
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.569.69.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Preparation of Porous Hydroxyapatite Scaffolds for Bone Tissue Engineering (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 510-511 (Mar. 2006), p. 754-757 
    Details
    ISSN: 1662-9752
    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: Porous hydroxyapatite (HAp) scaffolds were successfully prepared by using the HAp slurry based on the replication of polymer sponge substrate. The effect of HAp content in slurry on the pore morphology and size, and density, porosity, and mechanical strength of porous scaffolds was investigated. The scaffolds with average pore sizes ranging from 200 to 400 µm had an open, relatively uniform, and interconnected porous structure. As the HAp content increased, the porosityof scaffold decreased while the density increased. These phenomena were attributed to the fact that the pores became interconnected with more dense and thicker pore walls with increasing HAp content in slurry. The results suggest that the density, porosity, and compressive strength of the porous HAp scaffold were significantly affected by the content of the HAp powder in the slurry
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/12/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.510-511.754.pdf
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