Results 21 to 30 of about 366,004 (264)

Sulfur Line Vacancies in MoS2 for Catalytic Hydrogen Evolution Reaction

open access: yesCrystals, 2022
Defects in transition metal dichalcogenides play important roles in the field of the catalytic hydrogen evolution reaction (HER). However, the use of defective MoS2 as HER catalysts remains controversial because the types of defects are various ...
Meng Tang   +6 more
doaj   +1 more source

On Atomic and Molecular Structure [PDF]

open access: yesNature, 1920
THE statement of Mr. S. C. Bradford in the second paragraph of his letter to NATURE of April 8, that I suppose the electrons to revolve in small circles without any constraining force, is erroneous. The fact that I reserved an opinion as to the nature of the constraining force does not imply, as he suggests, that I deny its existence. Thus (cf. Science
openaire   +2 more sources

UJAT-Net: A U-Net Combined Joint-Attention and Transformer for Breast Tubule Segmentation in H&E Stained Images

open access: yesIEEE Access
The formation of breast tubules is an important evaluation index in the pathological grading of breast cancer. However, the tubules of breast present a wide variety of morphologies and a significant demonstrated significant advantages in the automatic ...
Li-Wang Liu   +6 more
doaj   +1 more source

Theories of Atomic Structure [PDF]

open access: yesNature, 1920
IN a letter to NATURE (March 11, p. 41) S. C. Bradford stated: “The great objection to Langmuir's theory of atomic structure is the difficulty of accepting his hypothesis of stationary eletrons.” The cases cited are all discussed in G. N. Lewis's paper, “The Atom and the Molecule” (Journ. Amer. Chem. Soc, xxxviii., p.
openaire   +2 more sources

Atomic structure of quasicrystals

open access: yesMaterials Science and Engineering, 1988
Abstract Progress in the determination of the atomic structure of quasicrystalline solids via pair distribution function analysis obtained by X-ray and neutron diffraction is reviewed. Common features of the local structure in these solids are described, followed by the discussion on the mechanism of stabilization of quasi-crystals by long-range ...
T. EGAMI, S.J. POON
openaire   +1 more source

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen   +23 more
wiley   +1 more source

Solid Pseudopapillary Neoplasm of the Pancreas in Children and Adolescents: Expert Recommendations

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Solid pseudopapillary neoplasm of the pancreas (SPN) is a rare low‐grade malignant exocrine pancreatic tumor, mostly discovered during the second decade of life in females, with a very good prognosis, provided microscopically complete surgical excision is achieved.
Sabine Irtan   +18 more
wiley   +1 more source

Distant two-qubit gates in atomic array with Rydberg interaction using geometric quantum control

open access: yesQuantum Frontiers
Connectivity between qubits plays an irreplaceable role in quantum computation. An urgent task of quantum computation based on atomic arrays is to generate effective coupling between two distant qubits, thereby enhancing connectivity.
Ze-Rui He   +10 more
doaj   +1 more source

Exploration of the atomic-level structures of the icosahedral clusters in Cu–Zr–Al ternary metallic glasses via first-principles theory

open access: yesMaterials Research Express, 2022
The atomic-level structures of the icosahedral clusters in Cu–Zr–Al ternary metallic glasses were studied via the first-principles theory. The rules of icosahedra stability were determined.
Wenfei Lu   +4 more
doaj   +1 more source

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