Results 101 to 110 of about 174,204 (270)

Listening to Hong Kong children's perspectives through pretend play

British Educational Research Journal, EarlyView.
Abstract Quality in early childhood education and care (ECEC) has become an increasing concern in recent years. The issue has been regularly discussed by different stakeholders. However, the rising concern regarding quality in ECEC has not seriously taken into account children's perspectives.
Suzannie K. Y. Leung
wiley   +1 more source

The “Skipping Rope” Technique: A Novel Strategy for Distal Burr Entrapment During Rotational Atherectomy

Catheterization and Cardiovascular Interventions, EarlyView.
ABSTRACT We describe the “skipping rope technique” for managing burr entrapment during rotational atherectomy. Sequential counterclockwise rotational force is applied to the drive shaft, generating alternative torque dynamics. This maneuver provides a safe method to disengage a stuck rotaburr, offering operators an additional strategy for this ...
Thomas J. Ford, Michael Parkinson, Colm Hanratty, Simon Walsh   +3 more
wiley   +1 more source

Receiving vectors of muon telescope of cosmic ray station Novosibirsk

Solar-Terrestrial Physics, 2016
The method of receiving vectors allows us to determine cosmic ray anisotropy at every moment of time. Also, the method makes it possible to study fast anisotropy fluctuations related to the interplanetary medium dynamics.
Yanchukovsky V.L., Grigoryev V.G., Krymsky G.F., Kuzmenko V.S., Molchanov A.D.   +4 more
doaj   +1 more source

Electronic Resonance Network Stabilized Crystal Structure in High‐Nickel Cathodes for Lithium‐Ion Batteries

Carbon Energy, EarlyView.
Transition metal (TM) ions with empty eg orbitals induce single‐electron delocalization in Ni3+ to form the resonance structure of Ni─OO─TM through the high‐entropy effect. High‐nickel cathode materials with electron resonance structure have the advantages of improving thermodynamic stability, suppressing phase transitions, and mitigating lattice ...
Yi Li, Qinwen Cui, Jinpeng Li, Xingyu Li, Liang Yin, Erhong Song, Youwei Wang, Xiaolin Zhao, Jianjun Liu   +8 more
wiley   +1 more source

Heat-rejection windows for telescopes [PDF]

, 1970
Heat-rejection telescope windows reflect incident solar energy outside the hydrogen-alpha line while processing a peak transmission exceeding fifty percent at 6563 angstrom units. The windows also function as secondary blocking filters to the telescope's
Austin, R., Rehnberg, J.
core   +1 more source

One‐Pot Transition‐Metal‐Free Methods for the Synthesis of All Three Bonds of the Alkyne's Triple Bond

Chemistry – A European Journal, EarlyView.
One‐pot transition‐metal‐free methods for the synthesis of all three bonds of the alkyne's triple bond are reviewed. After analysis of several named reactions and discussion of improvements, recent advances in the synthesis of alkynes are discussed. Each section contains a proposed reaction mechanism and analysis of the strengths and weaknesses of the ...
Eugene Kim, Yu Wu, Judith N. Currano, Jianyou Mao, Patrick J. Walsh   +4 more
wiley   +1 more source

Optimal model‐based design of experiments for parameter precision: Supercritical extraction case

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract This study investigates the process of chamomile oil extraction from flowers. A parameter‐distributed model consisting of a set of partial differential equations is used to describe the governing mass transfer phenomena in a cylindrical packed bed with solid chamomile particles under supercritical conditions using carbon dioxide as a solvent ...
Oliwer Sliczniuk, Pekka Oinas
wiley   +1 more source

A new broad K/Ka-band receiver (18.0–32.3 GHz) for the Yebes Observatory’s 40 meter radio telescope★

Astronomy & Astrophysics
Since 2010, the 40 m radio telescope of the Yebes Observatory has been devoted to very long baseline interferometry (VLBI) and single-dish observations. Up until 2019, it covered frequency bands between 2 GHz and 90 GHz in discontinuous and narrow radio ...
López-Pérez J. A., Tercero F., Gallego-Puyol J. D., Albo-Castaño C., Amils-Samalot R., Bautista-Durán M., Barbas L., Beltrán F., Díez-González M., García-Carreño P., García-Merino A., García-Pérez O., Gómez-Molina G., González-García J., López-Fernández I., Malo-Gómez I., Martínez-Parra A., Patino-Esteban M., Tercero B., Marcelino N., Esplugues G., Gallardo Cava I., García-Miró C., Gómez-Garrido M., Santander-García M., Tarrío P., Vidal-García A., de Vicente P., Cernicharo J.   +28 more
doaj   +1 more source

Hydrothermal Alkali‐Assisted Growth of Highly In‐Plane Crystallized Poly(Heptazine Imide) for Photocatalytic H2O2 Production

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A new re‐crystallization strategy was employed to design a highly crystallized poly(heptazine imide) photocatalyst, achieving strong light absorption capacity, accelerated separation/migration of photocarriers, and enhanced proton extraction capability simultaneously.
Xiaojuan Zhi, Hongguan Li, Yuxin Zhu, Xinglong Li, Jinfu Zhao, Zhongbiao Li, Jian Zeng, Jihoon Choi, Suvankul Nurmanov, Olim Ruzimuradov, Shulan Wang, Li Li   +11 more
wiley   +1 more source

Observing facilities at the European Southern Observatory (ESO) in Chile for cometary observations [PDF]

The (ESO) is located on the mountain La Silla (geographical coordinates: 4h42m55s10 west, -29 deg 15' 25".8 south, 2400 m elevation. The size of the telescopes ranges from a 40 cm Astrograph to the 3.6 m Richey-Chretien telescope.
Kohoutek, L., Rahe, J., Schnur, G. F. O.
core   +1 more source