Results 21 to 30 of about 79,313 (301)

Precise atmospheric oxygen measurements with a paramagnetic oxygen analyzer [PDF]

, 2002
A methodology has been developed for making continuous, high-precision measurements of atmospheric oxygen concentrations by modifying a commercially available paramagnetic oxygen analyzer. Incorporating several design improvements, an effective precision
Keeling, Ralph F., Manning, Andrew C., Severinghaus, Jeffrey P.   +2 more
core   +1 more source

The star-formation histories of elliptical galaxies across the fundamental plane [PDF]

, 2006
We present the first results from a study designed to test whether, given high-quality spectrophotometry spanning the mid-UV--optical wavelength regime, it is possible to distinguish the metal content (Z) and star-formation history (sfh) of individual ...
Dunlop, J. S., Heavens, A. F., Jimenez, Raul, Nolan, Louisa A., Panter, B., Smith, G.   +5 more
core   +2 more sources

Stellar population gradients in Fornax Cluster S0 galaxies: connecting bulge and disk evolution [PDF]

, 2011
We present absorption-line index gradients for a sample of S0 galaxies in the Fornax Cluster. The sample has been selected to span a wide range in galaxy mass, and the deep VLT-FORS2 spectroscopy allows us to explore the stellar populations all the way ...
A. Aragón-Salamanca, A. G. Bedregal, Aragón-Salamanca, Arimoto, Bacon, Bamford, Barnes, Bedregal, Bedregal, Bedregal, Bekki, Bender, Carlberg, Carollo, Cenarro, Christlein, Cohen, Couture, Davies, Eggen, Fisher, Fisher, González, Gorgas, Gorgas, Goudfrooij, Goudfrooij, Joly, Kobayashi, Kormendy, Kroupa, Kuntschner, Kuntschner, Larson, M. R. Merrifield, McClure, Mehlert, Mihos, Moss, Munn, N. Cardiel, Poggianti, Rawle, Schweizer, Shioya, Smith, Spinrad, Spolaor, Sánchez-Blázquez, Sánchez-Blázquez, Thomas, Thomas, Tully, Vazdekis, Welch, White, Wolf, Worthey   +57 more
core   +3 more sources

Nearby early-type galaxies with ionized gas. III. Analysis of line-strength indices with new stellar population models [PDF]

, 2006
In this paper we study the underlying stellar population of a sample of 65 nearby early-type galaxies predominantly located in low density environments.
A. Bressan, Annibali, Arimoto, Baugh, Bekki, Bender, Bertelli, Beuing, Blum, Bressan, Bressan, Bruzual, Buzzoni, Buzzoni, Carlberg, Carollo, Carollo, Castelli, Chavez, Chiosi, Clemens, Conti, Davies, Denicoló, Denicoló, Edvardsson, F. Annibali, Falcón-Barroso, Fisher, Forbes, Fuhrmann, Gabel, Gallazzi, Girardi, Gonzalez, Gorgas, Gott, Gott, Granato, Granato, Greggio, Grevesse, Ho, Jørgensen, Kauffmann, Kawata, Kobayashi, Kobayashi, Korn, Kuntschner, Kuntschner, Kurucz, L. Danese, Larson, Larson, Larson, Le Fèvre, Leonardi, Longhetti, Longhetti, Longhetti, Macchetto, Matteucci, Matteucci, McWilliam, Mehlert, Mehlert, Mehlert, Michard, Morganti, Nomoto, Pagel, Peletier, Pipino, Proctor, Prouton, Puzia, R. Rampazzo, Rampazzo, Ramírez, Saglia, Salaris, Salasnich, Salpeter, Sarzi, Steinmetz, Tantalo, Tantalo, Tantalo, Tantalo, Thielemann, Thomas, Thomas, Thomas, Thomas, Thomas, Trager, Trager, Tripicco, van Dokkum, VandenBerg, Varnas, Vazdekis, Vega, W. W. Zeilinger, Weiss, White, Woosley, Worthey, Worthey, Worthey, Worthey, Wu   +112 more
core   +2 more sources

Experimental study on small-strain shear modulus of calcareous sand

Yantu gongcheng xuebao, 2022
The small-strain shear modulus is an important parameter indicating soil stiffness in geotechnical engineering. In this study, the multidirectional bender element technique is used to investigate the small-strain shear modulus of calcareous sand from ...
SHI Jin-quan 1, 2, 3, XIAO Yang 1, 2, 3, LIU Han-long 1, 2, 3, Wim Haegeman 4
doaj   +1 more source

Strength Deterioration of Guar Gum-Modified Loess under Freeze-thaw Environments [PDF]

长江科学院院报
[Objective] To explore the impact of freeze-thaw environments on the strength of guar gum-modified loess, direct shear test, unconfined compression strength test, Brazilian splitting test, and bender element small-strain test are conducted to examine the
LIU Xin, WANG Xiao-jie, TONG Bin, YIN Rong-yi, ZHU Hong
doaj   +1 more source

Use of bender element tests for determining shear modulus of fly-ash and cement admixed Bangkok clay with considering unconfined compressive strength

Case Studies in Construction Materials, 2023
This study aims to perform experiments to determine both initial shear modulus and unconfined compressive strength of Bangkok soft clay improved by the ordinary Portland cement (OPC) and fly ash (FA).
Aruz Petcherdchoo, Sakol Pochalard, Keeratikan Piriyakul   +2 more
doaj   +1 more source

Piezoelectric vibration energy harvesting from airflow in HVAC (Heating Ventilation and Air Conditioning) systems [PDF]

, 2017
This study focuses on the design and wind tunnel testing of a high efficiency Energy Harvesting device, based on piezoelectric materials, with possible applications for the sustainability of smart buildings, structures and infrastructures.
Bontempi, Franco, Gkoumas, Konstantinos, Petrini, Francesco   +2 more
core   +1 more source

Mechanical Properties and Microscopic Mechanism of Basic Oxygen Furnace (BOF) Slag-Treated Clay Subgrades

Buildings, 2023
Civil engineering faces a substantial challenge when dealing with soft and compressible clayey soils. Conventional soil stabilization techniques involving ordinary Portland cement (OPC) result in notable CO2 emissions. This study explores the utilization
Arailym Mustafayeva, Aidana Bimykova, Sakiru Olarewaju Olagunju, Jong Kim, Alfrendo Satyanaga, Sung-Woo Moon   +5 more
doaj   +1 more source

Analysis of bender element test interpretation using the discrete element method

Granular Matter, 2015
While bender element testing is now well-established as a laboratory technique to determine soil stiffness, a robust technique to interpret the data remains elusive. A discrete element method (DEM) model of a face-centred cubic packing of uniform spheres was created to simulate bender element tests to investigate this test from a fundamental ...
O’Donovan, J., O’Sullivan, C., Marketos, G., Muir Wood, D.   +3 more
openaire   +4 more sources