Results 11 to 20 of about 568,484 (304)

Calculation of gravity effects of tridimensional structures by analytical integration of a polyhedric approximation and application to the inverse problem

Geofísica Internacional, 1987
Se deducen expresiones analíticas de rápido procesamiento en máquina, para el cálculo de la anomalía gravimétrica producida en un punto exterior por un modelo de cuerpo tridimensional homogéneo, definido al dar varias secciones verticales paralelas de ...
F. Guspi, A. Introcaso, E. Huerta
doaj   +1 more source

A Population of Dust-rich Quasars at z ~ 1.5 [PDF]

, 2012
We report Herschel SPIRE (250, 350, and 500 μm) detections of 32 quasars with redshifts 0.5 ≤z < 3.6 from the Herschel Multi-tiered Extragalactic Survey (HerMES).
Bergeron, Jacqueline, Bock, Jamie, Cooray, Asantha, Dai, Y. Sophia, Elvis, Martin, Fazio, Giovanni, Hatziminaoglou, Evanthia, Huang, Jia-Sheng, Ibar, Edo, Magdis, Georgios E., Oliver, Seb J., Omont, Alain, Page, Mathew J., Pérez-Fournon, Ismael, Rigopoulou, Dimitra, Roseboom, I. G., Scott, Douglas, Symeonidis, Myrto, Trichas, Markos, Vieira, Joaquin D., Willmer, Christopher N. A., Zemcov, Michael   +21 more
core   +4 more sources

On the Vectorization of FIR Filterbanks [PDF]

EURASIP Journal on Advances in Signal Processing, 2006
Cet article présente une technique de vectorisation pour mettre en œuvre des bancs DE FILTRES FIR. Le mot vectorisation, dans le cadre de ce travail, désigne une stratégie dans laquelle toutes les opérations itératives sont remplacées par des opérations vectorielles et matricielles équivalentes.
Jayme Garcia Arnal Barbedo, Amauri Lopes
openaire   +3 more sources

Phylogeny, Seed Trait, and Ecological Correlates of Seed Germination at the Community Level in a Degraded Sandy Grassland

Frontiers in Plant Science, 2016
Seed germination strongly affects plant population growth and persistence, and it can be dramatically influenced by phylogeny, seed traits, and ecological factors.
Zhengning Wang, Zhengning Wang, Lixin Wang, Zhimin Liu, Yanjuan Li, Yanjuan Li, Qingqing Liu, Qingqing Liu, Bo Liu, Bo Liu   +9 more
doaj   +1 more source

Analysis spatial distribution trees in forest stands [PDF]

Glasnik Šumarskog Fakulteta: Univerzitet u Beogradu, 2006
The analyses of the horizontal distribution of trees have not been used in the research of stand structure in Serbia’s forestry to date. Taking into account the high economic and ecological applicability of such information, this paper deals with the ...
Stajić Branko, Vučković Milivoj
doaj   +1 more source

Third-Generation Calibrations for MeerKAT Observation

Galaxies, 2021
Superclusters and galaxy clusters offer a wide range of astrophysical science topics with regards to studying the evolution and distribution of galaxies, intra-cluster magnetization mediums, cosmic ray accelerations and large scale diffuse radio sources ...
Viral Parekh, Robert Kincaid, Benjamin Hugo, Athanaseus Ramaila, Nadeem Oozeer   +4 more
doaj   +1 more source

Xylem cavitation in roots and stems of Douglas-fir and white fir [PDF]

Tree Physiology, 1997
Roots of hardwoods have been shown to be more vulnerable to xylem cavitation than stems. This study examined whether this pattern is also observed in a conifer species. Vulnerability to cavitation was determined from the pressure required to inject air into the vascular system of hydrated roots and stems, and reduce hydraulic conductance of the xylem ...
J S, Sperry, T, Ikeda
openaire   +2 more sources

Implementasi Metode Windowing Rectangular, Hamming, Hann, dan Kaiser pada Filter Finite Impulse Response (FIR) menggunakan Raspberry Pi

Jurnal Jaringan Telekomunikasi, 2020
Penggunaan filter digital sangat dibutuhkan oleh sistem-sistem elektronika, seperti dalam hal pengolahan sinyal maupun audio. Kegunaan filter digital adalah untuk menyaring frekuensi serta memodifikasi spektrum frekuensi pada suatu sinyal sehingga ...
Binariesya Maulydia, M. Nanak Zakaria, Waluyo Waluyo   +2 more
doaj   +1 more source

Aluminum-Induced Alterations to the Cell Wall and Antioxidant Enzymes Involved in the Regulation of the Aluminum Tolerance of Chinese Fir (Cunninghamia lanceolata)

Frontiers in Plant Science, 2022
Chinese fir (Cunninghamia lanceolata), which is an important coniferous tree species in China, is mainly planted in acidic soils with toxic aluminum (Al) levels.
Shanshan Xu, Shanshan Xu, Lihua Wu, Lihua Wu, Lingyan Li, Lingyan Li, Minghui Zhong, Minghui Zhong, Ying Tang, Ying Tang, Guangqiu Cao, Guangqiu Cao, Kaimin Lin, Kaimin Lin, Yiquan Ye, Yiquan Ye   +15 more
doaj   +1 more source

Effect of Freezing Temperature on Impact Bending Strength and Shore-D Hardness of Some Wood Species

BioResources, 2022
Wood is exposed to variable environmental conditions during its use. Low temperature is one of the most important environmental factors affecting the behavior of wood in use.
Osman Emre Özkan
doaj   +2 more sources