Results 81 to 90 of about 245,415 (286)

Discovery of Blue Hook Stars in the Massive Globular Cluster M54

open access: yes, 2003
We present BV photometry centered on the globular cluster M54 (NGC 6715). The color-magnitude diagram clearly shows a blue horizontal branch extending anomalously beyond the zero age horizontal branch theoretical models.
Alejandra Recio‐Blanco   +7 more
core   +1 more source

Manipulating Atomic Disorder and Mesoscale Architectures for High‐Efficiency Thermoelectric Modules

open access: yesAdvanced Science, EarlyView.
The in situ reaction of PbTiO3 precursor reacts in situ with the Bi0.5Sb1.5Te3 matrix, effectively enlarging the energy barrier for minority carrier excitation and suppressing bipolar diffusion, and predominantly scattering mid‐to‐low frequency phonons. Ultimately, a single thermoelectric module was fabricated to achieve a competitive efficiency of ∼7%
Jiwu Xin   +10 more
wiley   +1 more source

Hot Flashes in Prostate Cancer: State of the Science

open access: yesAmerican Journal of Men's Health, 2008
The lack of progress concerning the concept of the hot flash experience in men is an indication of the need for exploration of this phenomenon. The hot flash experience in men is a problem that can no longer be ignored.
Christine A. Engstrom PhD(c), CRNP, AOCN
doaj   +1 more source

The Origin of Hot Subluminous Horizontal-Branch Stars in Omega Centauri and NGC 2808

open access: yes, 2002
Hot subluminous stars lying up to 0.7 mag below the extreme horizontal branch (EHB) are found in the UV color-magnitude diagrams of omega Cen and NGC 2808. Such stars are unexplained by canonical HB theory.
Brown, Thomas M.   +4 more
core  

Highly Vertically Oriented Graphene Microstrip Pads With Ultrahigh Through‐Plane Thermal Conductivity and Ultralow Compressive Modulus for Efficient Heat Dissipation

open access: yesAdvanced Science, EarlyView.
Vertically aligned graphene microstrip pads (GMPs) break the traditional thermomechanical trade‐off in thermal interface materials. It simultaneously achieves an ultrahigh through‐plane thermal conductivity of 565.92 W m−1 K−1 and an ultralow compressive modulus below 115.16 kPa.
Xu Ran   +7 more
wiley   +1 more source

An average update frequency based NAND flash garbage collection algorithm

open access: yesDianzi Jishu Yingyong, 2019
Aiming at the unique properties of NAND flash, an average update frequency based NAND flash garbage collection algorithm is proposed. Firstly, the victim block selection strategy based on invalid page age sum is adopted.
Huang Minyuan, Yan Hua
doaj   +1 more source

Hot Flash: Lima Branch Ohio State University [PDF]

open access: yes, 1971
The Ohio State University has digitized some of its historically significant content for use by scholars, students and the public. These materials should be examined as part of the historical record.

core  

Non-equilibrium of Ionization and the Detection of Hot Plasma in Nanoflare-heated Coronal Loops

open access: yes, 2008
Impulsive nanoflares are expected to transiently heat the plasma confined in coronal loops to temperatures of the order of 10 MK. Such hot plasma is hardly detected in quiet and active regions, outside flares.
Fabio Reale   +6 more
core   +1 more source

Electrode‐Engineered Dual‐Mode Multifunctional Lead‐Free Perovskite Optoelectronic Memristors for Neuromorphic Computing

open access: yesAdvanced Electronic Materials, EarlyView.
A lead‐free perovskite memristive solar cell structure that call emulate both synaptic and neuronal functions controlled by light and electric fields depending on top electrode type. ABSTRACT Memristive devices based on halide perovskites hold strong promise to provide energy‐efficient systems for the Internet of Things (IoT); however, lead (Pb ...
Michalis Loizos   +4 more
wiley   +1 more source

Very Late Thermal Pulses Influenced by Accretion in Planetary Nebulae

open access: yes, 2009
We consider the possibility that a mass of ~10^{-5}-10^{-3} Msun flows back from the dense shell of planetary nebulae and is accreted by the central star during the planetary nebula phase.
Adam Frankowski   +25 more
core   +1 more source

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