Results 111 to 120 of about 624,360 (350)

The Bright Clouds [PDF]

Nature, 1886
THE bright cirrus-like clouds are very common here this summer. I have seen them here on the nights of the 12th, 18th, 20th, and 24th of last month, and on the 1st inst., also at Gilsland on the 27th ult., in fact I do not know that in the last fortnight there has been a single night on which the northern sky has been quite free from lower clouds on ...
openaire   +2 more sources

Using a Supramolecular Approach to Engineer Modular Hydrogel Platforms for Culturing Protoplasts – from General Tissue Engineering to Cellular Agriculture

Advanced Biology, EarlyView.
Using supramolecular monomers, various hydrogel culture systems were formulated to culture protoplasts; including 2D, 2.5D, and 3D hydrogels. Depending on the culture platform, bioactive functionalization led to protoplast enlargement (2D and 2.5D) or plasmolysis (3D). This work shows the potential to modularly engineer synthetic platforms for cellular
Maritza M. Rovers, Erik J. Slootweg, Ferdinand C. O. Los, Patricia Y. W. Dankers   +3 more
wiley   +1 more source

Bright-dark solitons and their collisions in mixed N-coupled nonlinear Schrödinger equations [PDF]

, 2007
Mixed type (bright-dark) soliton solutions of the integrable N-coupled nonlinear Schr{\"o}dinger (CNLS) equations with mixed signs of focusing and defocusing type nonlinearity coefficients are obtained by using Hirota's bilinearization method. Generally, for the mixed N-CNLS equations the bright and dark solitons can be split up in $(N-1)$ ways.
arxiv   +1 more source

From Solar to Stellar Brightness Variations: The Effect of Metallicity

, 2018
Context. Comparison studies of Sun-like stars with the Sun suggest an anomalously low photometric variability of the Sun compared to Sun-like stars with similar magnetic activity.
Krivova, N. A., Schmutz, W., Shapiro, A. I., Solanki, S. K., Witzke, V.   +4 more
core   +1 more source

Bridging Nature and Technology: A Perspective on Role of Machine Learning in Bioinspired Ceramics

Advanced Engineering Materials, EarlyView.
Machine learning (ML) is revolutionizing the development of bioinspired ceramics. This article investigates how ML can be used to design new ceramic materials with exceptional performance, inspired by the structures found in nature. The research highlights how ML can predict material properties, optimize designs, and create advanced models to unlock a ...
Hamidreza Yazdani Sarvestani, Aditi Singh, Behnam Ashrafi   +2 more
wiley   +1 more source

TIR-MS: Thermal Infrared Mean-Shift for Robust Pedestrian Head Tracking in Dynamic Target and Background Variations

Applied Sciences, 2019
Thermal infrared (TIR) pedestrian tracking is one of the major issues in computer vision. Mean-shift is a powerful and versatile non-parametric iterative algorithm for finding local maxima in probability distributions. In existing infrared data, and mean-
Sungmin Yun, Sungho Kim
doaj   +1 more source

The HI Content and Extent of Low Surface Brightness Galaxies - Could LSB Galaxies be Responsible for Damped Ly-alpha Absorption? [PDF]

arXiv, 2001
Low surface brightness galaxies, those galaxies with a central surface brightness at least one magnitude fainter than the night sky, are often not included in discussions of extragalactic gas at z < 0.1. In this paper we review many of the properties of low surface brightness galaxies, including recent studies which indicate low surface brightness ...
arxiv  

The sky brightness and transparency in i-band at Dome A, Antarctica

, 2011
The i-band observing conditions at Dome A on the Antarctic plateau have been investigated using data acquired during 2008 with the Chinese Small Telescope ARray. The sky brightness, variations in atmospheric transparency, cloud cover, and the presence of
A. M. Moore, Bo Sun, C. A. Kulesa, C. K. Walker, C. R. Pennypacker, D. G. York, D. M. Luong-Van, Genrong Liu, Hu Zou, Huigen Yang, J. S. Lawrence, J. W. V. Storey, Ji Yang, Jiali Wang, Jianghua Wu, Jingyao Hu, Jun Ma, Jun Yan, Lifan Wang, Lirong Xia, Longlong Feng, M. C. B. Ashley, T. Travouillon, Weijia Qin, Xiangqun Cui, Xiangyan Yuan, Xu Zhou, Xuefei Gong, Yongqiang Yao, Zhanhai Zhang, Zhaohui Shang, Zhaoji Jiang, Zhenxi Zhu, Zhenyu Wu   +33 more
core   +1 more source

Development of Ternary Magnesium Alloys for Laser Powder Bed Fusion: Optimizing Oxide Layer Thickness

Advanced Engineering Materials, EarlyView.
Additive manufacturing of magnesium alloys by laser is difficult because the melting point of the oxide layer is much higher than the evaporation temperature of the metal underneath. Making the oxide layer thinner can solve this problem. Alloying magnesium with strontium makes the oxide layer thinner, especially at 0.5 wt%.
Elmar Jonas Breitbach, Stefan Julmi, Sabine Behrens, Tatiana Blank, Arvid Abel, Nicole Emminghaus, Ludger Overmeyer, Christian Klose, Hans Jürgen Maier   +8 more
wiley   +1 more source

Removal of iron and titanium contaminants from Jordanian Kaolins by using chemical leaching

Journal of Taibah University for Science, 2018
The present study deals with chemical leaching tests conducted on Batn El-Ghoul kaolin clay deposit, south Jordan. Mineral identification and characterization studies were conducted using X-ray diffraction.
M. Gougazeh
doaj   +1 more source