Wszystkie pola: Aust - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Lockerbie : the other case
Autorzy:: Aust, Anthony.
Powiązania:: International and Comparative Law Quarterly 2000, vol. 49, nr 2, s. 278-296
Data publikacji:: 2000
Tematy:: Terroryzm Libia
Prawo
Terroryzm
Dostawca treści:: Bibliografia CBW

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Tytuł:: Unique bone histology in partial large bone shafts from Upper Triassic of Aust Cliff, England: An early independent experiment in gigantism
Autorzy:: Redelstorff, R.
Sander, P.M.
Galton, P.M.
Powiązania:: https://bibliotekanauki.pl/articles/945884.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:: paleontology
Reptilia
Dinosauria
bone
histology
large bone shaft
primary osteon
secondary osteon
osteon
Upper Triassic
Triassic
Aust Cliff
England
gigantism
Opis:: Two giant partial bone shafts, possible femora, from the Rhaetian Bone Bed (Upper Triassic) of Aust Cliff in SW England continue to conceal their origin. The most striking characteristic of these bones is their size, showing that dinosaur-like gigantism had already evolved by the Late Triassic. Based on their characteristic, columnar shaft morphology, it was previously suggested they came from a prosauropod or stegosaur. The bone histology of both specimens is very similar: the cortex is always rather thin, not exceeding 10 mm, and is of fibrolamellar type with longitudinal primary osteons. The primary osteons show a rather unusual feature, the development of a secondary osteon inside the primary one. The bone surface in both specimens shows open vascular canals, suggesting that the animals were still growing at the time of death, but an external fundamental system (EFS) is visible in the outermost cortex of specimen BRSMG Cb3870. The external cortex shows dense growth marks, but their annual nature is difficult to ascertain. The bones are probably dinosaurian, as indicated by the fibrolamellar bone, and possibly belong to an unknown basal sauropodomorph lineage. Alternatively, some very large pseudosuchians may have evolved fibrolamellar bone independently as an adaptation for reaching giant size.
Źródło:: Acta Palaeontologica Polonica; 2014, 59, 3; 607-615
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Modulation-Mode Assignment in SVD-Aided Downlink Multiuser MIMO-OFDM Systems
Autorzy:: Aust, S.
Ahrens, A.
Benavente-Peces, C.
Powiązania:: https://bibliotekanauki.pl/articles/227057.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: multiple-input multiple-output system
orthogonal frequency division multiplexing
singular value decomposition
bit allocation
wireless transmission
Opis:: Multicarrier transmission such as OFDM (orthogonal frequency division multiplexing) is an established technique for radio transmission systems and it can be considered as a promising approach for next generation wireless systems. However, in order to comply with the demand on increasing available data rates in particular in wireless technologies, systems with multiple transmit and receive antennas, also called MIMO (multiple-input multiple-output) systems, have become indispensable for future generations of wireless systems. Due to the strongly increasing demand in high-data rate transmission systems, frequency non-selective MIMO links have reached a state of maturity and frequency selective MIMO links are in the focus of interest. In this field, the combination of MIMO transmission and OFDM can be considered as an essential part of fulfilling the requirements of future generations of wireless systems. However, single-user scenarios have reached a state of maturity. By contrast multiple users' scenarios require substantial further research, where in comparison to ZF (zero-forcing) multiuser transmission techniques, the individual user's channel characteristics are taken into consideration in this contribution. The performed joint optimization of the number of activated MIMO layers and the number of transmitted bits per subcarrier shows that not necessarily all user-specific MIMO layers per subcarrier have to be activated in order to minimize the overall BER under the constraint of a given fixed data throughput.
Źródło:: International Journal of Electronics and Telecommunications; 2011, 57, 4; 459-464
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki