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Steiner tree: a deep reinforcement learning approach

, 2021
Tong, GuangmoThe Steiner tree problem is a classical combinatorial optimization problem that targets interconnecting a set of points by a network whose total length is the shortest, where the network consists of the original points and the newly added ...
Wang, Siqi
core +1 more source

Wildfire Induces Changes in Receiving Waters: A Review With Considerations for Water Quality Management

Water Resources Research, Volume 58, Issue 9, September 2022., 2022
Abstract Wildfires have increased in frequency in many ecosystems, with implications for human health and the environment, including water quality. Increased fire frequency and urbanization also raise the prospect of fires burning into urban areas, mobilizing pollutants few have considered to date.
M. J. Paul +5 more
wiley +1 more source

Characterization of chromospheric activity based on Sun‐as‐a‐star spectral and disk‐resolved activity indices

Astronomische Nachrichten, Volume 343, Issue 5, June 2022., 2022
Abstract The strong chromospheric absorption lines Ca ii H & K are tightly connected to stellar surface magnetic fields. Only for the Sun, spectral activity indices can be related to evolving magnetic features on the solar disk. The Solar Disk‐Integrated (SDI) telescope feeds the Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) of the ...
Ekaterina Dineva +6 more
wiley +1 more source

The Steiner tree problem on graphs: inapproximability results [PDF]

, 2008
The Steiner tree problem on weighted graphs seeks a minimum weight subtree containing a given subset of the vertices (terminals). We show that it is NP-hard to approximate the Steiner tree problem within a factor 96/95.
Chlebikova, Janka +4 more
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Pachyrhynchus Weevils Use 3D Photonic Crystals with Varying Degrees of Order to Create Diverse and Brilliant Displays

Small, Volume 18, Issue 20, May 19, 2022., 2022
3D photonic materials of varying order form the basis of the beautiful displays of many insects. This study characterises the ultrastructures and optical properties of the elytral scales found in a wide array of different Easter Egg weevils. The various mechanisms with which the species changes its colorful appearance are highlighted and linked to the ...
Alessandro Parisotto +4 more
wiley +1 more source

Local limit theorems for subgraph counts

Journal of the London Mathematical Society, Volume 105, Issue 2, Page 950-1011, March 2022., 2022
Abstract We introduce a general framework for studying anticoncentration and local limit theorems for random variables, including graph statistics. Our methods involve an interplay between Fourier analysis, decoupling, hypercontractivity of Boolean functions, and transference between ‘fixed‐size’ and ‘independent’ models.
Ashwin Sah, Mehtaab Sawhney
wiley +1 more source

SARS‐CoV‐2 infection and venous thromboembolism after surgery: an international prospective cohort study

Anaesthesia, Volume 77, Issue 1, Page 28-39, January 2022., 2022
Summary SARS‐CoV‐2 has been associated with an increased rate of venous thromboembolism in critically ill patients. Since surgical patients are already at higher risk of venous thromboembolism than general populations, this study aimed to determine if patients with peri‐operative or prior SARS‐CoV‐2 were at further increased risk of venous ...
COVIDSurg Collaborative +16163 more
wiley +1 more source

Fast Retrieval of Cloud Optical Depth From Polarimetry and Multi‐Spectral Imagery That Accounts for Cloud Heterogeneity Using 3D Radiative Transfer

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 3, 16 February 2026.
Abstract We present a method for retrieving cloud optical depth that applies 3D radiative transfer to utilize the combination of polarimetry and multi‐spectral imagery that is newly available from satellite missions such as the Plankton, Aerosol, Cloud, Ocean, Ecosystem (PACE) Mission. Due to the approximate spectral invariance of scattering by clouds,
Jesse Loveridge, Christine Chiu, Alexander Marshak +2 more
wiley +1 more source

Response from Edmund Steiner

, 1954
Correspondence sent from Edmund F. Steiner to Reverend Boohar in response to the Reverend s recent letter. Steiner notes that to date, no violence has taken place in Milford and that the decision to remove the Black students from the school was made in ...
Steiner, Edmund
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Feeding Mystus gulio Fry With Different Dietary Inclusion of Coccomyxa Sp.: Changes in Nutritional Profile, Pigments and Digestive Enzyme Activities

Aquaculture, Fish and Fisheries, Volume 5, Issue 4, August 2025.
ABSTRACT The aim of this study was to investigate the effects of Coccomyxa sp. on the survival, nutritional profile, pigments and digestive enzyme activities of Mystus gulio. A 75‐day feeding trial was performed during which the fish fry were fed with microalgae as a partial replacement for other nutritional components.
Subeda Newase +8 more
wiley +1 more source

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