Autor: Herrmann, A. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Model and tool based approach for the testing of cooperative systems within traffic
Autorzy:: Krause, J.
Magnus, S.
Schönrock, R.
Herrmann, A.
Tematy:: cooperative systems
distributed testing
traffic simulation
systemy współpracujące
testowanie rozproszone
symulacja ruchu; Pokaż więcej
Wydawca:: Polskie Stowarzyszenie Telematyki Transportu
Powiązania:: https://bibliotekanauki.pl/articles/393776.pdf Link otwiera się w nowym oknie
Opis:: The testing of cooperative transport systems is challenging because of their complexity and distributions. With TTCN3 a standard based procedure is available for specifying, executing and evaluating the testing of distributed systems such as cooperative transport systems. In the paper a standard, model and tool based solution for the testing of distributed cooperative transport systems is introduced. Based on the TTCN3 semantic, a specific model based approach for dealing with the complexity of the necessary distributed test systems was developed. With the help of some practiceoriented examples from the traffic sector this approach is presented.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Structure and mechanical properties of spark plasma sintered TiN-based nanocomposites
Struktura i właściwości mechaniczne nanokompozytów na bazie TiN spiekanych iskrowo plazmowo
Autorzy:: Zgalat-Łozynskyy, O.
Herrmann, M.
Ragulya, A.
Andrzejczuk, M.
Polotai, A.
Tematy:: nanoproszki
spiekanie
nanokompozyty
nanocomposites
spark plasma sintering
grain boundaries
nanohardness; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/356449.pdf Link otwiera się w nowym oknie
Opis:: Consolidation of commercially available titanium nitride nanostructured powder as well as nanocomposite powders in the Si3N4-TiN and TiN-TiB2 systems have been performed by Spark Plasma Sintering (SPS) in the temperature range from 1200 degree Celsjus to 1550 degree Celsjus. The effect of non-linear heating and loading regimes on high melting point nanocomposites consolidation has been investigated.
Spiekanie komercyjnego nanoproszku TiN jak i nanokompozytowych proszków Si3N4-TiN i TiN-TiB2 zostało przeprowadzone metodą spiekania iskrowo plazmowego (SPS) w zakresie temperatur od 1200 stopni Celsjusza to 1550 stopni Celsjusza. Badano wpływ nieliniowego ogrzewania i warunków obciążenia na spiekanie wysokotopliwych nanokompozytów.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Monitoring of Heat Treatment Processes by High Energy Synchrotron Radiation
Autorzy:: Klemradt, U.
Rieger, T.
Herrmann, K.
Carmele, D.
Meyer, S.
Lippmann, T.
Stark, A.
Bleck, W.
Tematy:: 61.05.cp
81.05.Bx
81.30.Kf
81.40.Ef; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1490740.pdf Link otwiera się w nowym oknie
Opis:: Advanced engineering materials are frequently based on multiphase microstructures, where the decisive step is the heat treatment adjusting the desired microstructure. A typical example are transformation-induced plasticity assisted steels, where the steel grades depend on the phase composition and the deformation-induced transformation of retained austenite into martensite. Usually methods for microstructural characterization are only applied after completion of the heat treatment process and comprise typically microscopy and X-ray analysis with laboratory tubes. Both methods can suffer from artefacts and probe a relatively small surface or volume, respectively. However, in the last decade synchrotron facilities have become available that offer very hard X-rays, which open up new possibilities for the observation of heat treatment processes owing to the unique combination of extremely high intensities with large penetration depths (mm scale). Sophisticated sample environments allow for complex in situ experiments, currently with a time resolution on the order of seconds. Only recently a commercial dilatometer of type Bähr Dil805AD has become available at the HARWI-2 beamline at the HASYLAB. This experimental setup was used for the in situ investigation of the quenching and partitioning process in transformation-induced plasticity steels. The experiments were performed in transmission at a wavelength of 0.0124 nm. The Debye-Scherrer rings were observed arising from statistical grain distributions characteristic for each microstructure. The time-resolved measurements allow conclusions about the phases present in the sample, their lattice parameters, texture and grain size.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Optical imaging of ferroelectric domains in periodically poled lithium niobate using ferroelectric liquid crystals
Autorzy:: Meier, Patrick A.
Keuker-Baumann, Susanne
Röder, Thorsten
Herrmann, Harald
Ricken, Raimund
Silberhorn, Christine
Kitzerow, Heinz-S.
Tematy:: polarization microscopy
imaging using birefringence
ferroelectric liquid crystal
periodically poled lithium niobate
quasi-phase-matching; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Powiązania:: https://bibliotekanauki.pl/articles/59112937.pdf Link otwiera się w nowym oknie
Opis:: Ferroelectric liquid crystals exhibiting a chiral smectic C* phase are deposited on z-cut periodically poled lithium niobate substrates and investigated by polarized optical microscopy. While the pure substrates placed between crossed polarizers and observed in transmission appear dark, uniformly aligned liquid crystal films deposited on these substrates show alternating domains with varying brightness. This effect can be attributed to the well-known coupling between the direction of the spontaneous polarization and the optical axis in the birefringent ferroelectric smectic C* phase. Quantitative measurements of the tilt angle between the local optical axis and the smectic layer normal confirm antiparallel orientations of spontaneous polarization of the liquid crystal from domain to domain, as expected by the periodic poling of the lithium niobate substrate. This effect provides a valuable non-destructive method of optical inspection of the quality of periodically poled ferroelectric substrates, which plays an important role in achieving quasi-phase-matching in non-linear optical applications.
Dostawca treści:: Biblioteka Nauki