Results 81 to 90 of about 17,521,233 (323)

The prototype of ancient analemmatic sundials (Rostov Oblast, Russia) [PDF]

open access: yesArchaeoastronomy and Ancient Technologies, 2016
The article presents the results of a study of petroglyphs on a unique stone slab discovered near the kurgan 1 of the kurgan field Varvarinsky I (Rostov Oblast, Russia).
Vodolazhskaya, L.N.   +2 more
doaj   +1 more source

Long wavelength infrared detector [PDF]

open access: yes, 1993
Long wavelength infrared detection is achieved by a detector made with layers of quantum well material bounded on each side by barrier material to form paired quantum wells, each quantum well having a single energy level.
Vasquez, Richard P.
core   +1 more source

Revivals in the attractive BEC in a double-well potential and their decoherence

open access: yes, 2010
We study the dynamics of ultracold attractive atoms in a weakly linked two potential wells. We consider an unbalanced initial state and monitor dynamics of the population difference between the two wells.
D. J. Griffiths   +5 more
core   +1 more source

A Systematic Review of Evidence on the Clinical Effectiveness of Surveillance Imaging in Children With Medulloblastoma and Ependymoma

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Surveillance imaging aims to detect tumour relapse before symptoms develop, but it's unclear whether earlier detection of relapse leads to better outcomes in children and young people (CYP) with medulloblastoma and ependymoma. This systematic review aims to identify relevant literature to determine the efficacy of surveillance magnetic ...
Lucy Shepherd   +3 more
wiley   +1 more source

Quantum Chaos in Quantum Wells

open access: yes, 1998
We develop a quantitative semiclassical theory for the resosnant tunneling through a quantum well in a tilted magnetic field. It is shown, that in the leading semiclassical approximation the tunneling current depends only on periodic orbits within the ...
A.Douglas Stone   +32 more
core   +1 more source

Prognostic Impact of Treatment Modalities, Including Targeted Compartmental Radio‐Immunotherapy, in a Cohort of Neuroblastoma Patients With CNS Metastases at Relapse

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Neuroblastoma (NB) with central nervous system (CNS) metastases is rare at diagnosis, but occurs more often during relapse/progression. Patients with CNS metastases face a dismal prognosis, with no standardized curative treatment available.
Vicente Santa‐Maria Lopez   +13 more
wiley   +1 more source

The practice of history: the Smithsons, Colin St John Wilson, and the writing of architectural history

open access: yesJournal of Art Historiography, 2016
The purpose of this paper is to explore the type, form, and methodology of history written by practicing architects following the arrival of kunstgeschichte in Britain. Through an analysis of historical writings by Alison and Peter Smithson, and Colin St
Matthew Wells
doaj  

On the Issue of the Radon Activity of Tectonic Faults on the Qatar Peninsula

open access: yesNauka ta progres transportu
Purpose. The paper aims at providing the modern evaluation of radon activity in identified tectonic faults of the earth's crust based on archival data of radon measurements in groundwater which previously have been performed in the northern and eastern ...
V. Y. Ulyanov, V. V. Bilyk
doaj   +1 more source

Geothermal energy sources and possibilities of their exploitation [PDF]

open access: yesActa Montanistica Slovaca, 2007
The geothermal energy is everywhere beneath the surface of the earth. The earth’s interior is enormous thermal reservoir of energy, which can be utilized if favorable geological conditions exist.The electricity generation in 1942 at Larderello was a ...
Pavol Rybár
doaj  

Light wave propagation through a dilaton-Maxwell domain wall

open access: yes, 2015
We consider the propagation of electromagnetic waves through a dilaton-Maxwell domain wall of the type introduced by Gibbons and Wells [G.W. Gibbons and C.G. Wells, Class. Quant. Grav. 11, 2499-2506 (1994)].
Morris, J. R., Schulze-Halberg, A.
core   +1 more source

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