Results 71 to 80 of about 1,181,220 (330)

The Faint Cepheids of the Small Magellanic Cloud: an evolutionary selection effect?

open access: yes, 2003
Two problems about the faintest Small Magellanic Cloud (SMC) Cepheids are addressed. On one hand evolutionary tracks fail to cross the Cepheid Instability Strip for the highest magnitudes (i.e.
Alexander   +59 more
core   +2 more sources

Dynamical Instabilities of Quasi-static Crack Propagation Under Thermal Stress [PDF]

open access: yes, 2003
We address the theory of quasi-static crack propagation in a strip of glass that is pulled from a hot oven towards a cold bath. This problem had been carefully studied in a number of experiments that offer a wealth of data to challenge the theory.
Bouchbinder, Eran   +2 more
core   +1 more source

Temperature Differences in the Cepheid Instability Strip Require Differences in the Period-Luminosity Relation in Slope and Zero Point [PDF]

open access: yes, 2008
A graphical and an algebraic demonstration is made to show why the slope and zero point of the Cepheid period-luminosity (P-L) relation is rigidly coupled with the slope and zero point of the Cepheid instability strip in the HR diagram. In this way it is
A. Sandage, G. Tammann
semanticscholar   +1 more source

Photon-triggered instability in the flux flow regime of a strongly disordered superconducting strip

open access: yesPhysical review B, 2019
We study, theoretically, the single-photon response of a strongly disordered thin superconducting strip in the flux flow state. We find that this resistive state, at a current I larger than the critical current Ic, jumps to the normal state by the ...
D. Vodolazov, T. Klapwijk
semanticscholar   +1 more source

On the Purity of the ZZ Ceti Instability Strip: Discovery of More Pulsating DA White Dwarfs on the Basis of Optical Spectroscopy [PDF]

open access: yes, 2003
We report the discovery of two new ZZ Ceti pulsators, LP 133-144 and HE 1258+0123, selected on the basis of model atmosphere fits to optical spectroscopic data. The atmospheric parameters for LP 133-144 (Teff = 11,800 ± 200 K and log g = 7.87 ± 0.05) and
Pierre Bergeron   +4 more
semanticscholar   +1 more source

PARP inhibition and pharmacological ascorbate demonstrate synergy in castration‐resistant prostate cancer

open access: yesMolecular Oncology, EarlyView.
Pharmacologic ascorbate (vitamin C) increases ROS, disrupts cellular metabolism, and induces DNA damage in CRPC cells. These effects sensitize tumors to PARP inhibition, producing synergistic growth suppression with olaparib in vitro and significantly delayed tumor progression in vivo. Pyruvate rescue confirms ROS‐dependent activity.
Nicolas Gordon   +13 more
wiley   +1 more source

Deep Transverse Lateral Retinaculum Reconstruction for Medial Patellar Instability

open access: yesArthroscopy Techniques, 2015
Medial patellar instability can be a disabling complication of an extensive lateral retinaculum release. It is often overlooked, and for the diagnosis, it is necessary to have a high index of suspicion.
Vicente Sanchis-Alfonso, M.D., Ph.D.   +3 more
doaj   +1 more source

Spectroscopic analysis of DA white dwarfs from the McCook & Sion catalog [PDF]

open access: yes, 2008
For some years now, we have been gathering optical spectra of DA white dwarfs in an effort to study and define the empirical ZZ Ceti instability strip. However, we have recently expanded this survey to include all the DA white dwarfs in the McCook & Sion
A Gianninas   +13 more
core   +1 more source

Phenotypic and genotypic characterization of single circulating tumor cells in the follow‐up of high‐grade serous ovarian cancer

open access: yesMolecular Oncology, EarlyView.
Single circulating tumor cells (sCTCs) from high‐grade serous ovarian cancer patients were enriched, imaged, and genomically profiled using WGA and NGS at different time points during treatment. sCTCs revealed enrichment of alterations in Chromosomes 2, 7, and 12 as well as persistent or emerging oncogenic CNAs, supporting sCTC identity.
Carolin Salmon   +9 more
wiley   +1 more source

New nonadiabatic pulsation computations on full PG 1159 evolutionary models: the theoretical GW Virginis instability strip revisited [PDF]

open access: yes, 2006
Aims. We reexamine the theoretical instability domain of pulsating PG 1159 stars (GW Vir variables). Methods. We performed an extensive g -mode stability analysis on PG 1159 evolutionary models with stellar masses ranging from 0.530 to $0.741~M_{\odot}$,
A. Córsico   +4 more
semanticscholar   +1 more source

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