Results 41 to 50 of about 83,326 (348)

Avaliação da geração de microtrincas do aço rápido ABNT M2 no processo EDM com adição de SiC = Evaluation of microcrack formation of ABNT M2 high speed steel in the EDM process, with addition of silicon carbide powder

Acta Scientiarum: Technology, 2008
É sabido que a Usinagem por Descargas Elétricas (EDM) é um processo térmico em que pode haver temperaturas muito elevadas (superiores a 1.200°C) na região de usinagem.
Jean Robert Pereira Rodrigues, Claudionor Cruz, Sinésio Domingues Franco, José Roberto Pereira Rodrigues, Wellinton de Assunção   +4 more
doaj  

Recognition of landslides in lunar impact craters

European Journal of Remote Sensing, 2018
Landslides have been observed on several planets and minor bodies of the solar System, including the Moon. Notwithstanding different types of slope failures have been studied on the Moon, a detailed lunar landslide inventory is still pending. Undoubtedly,
Marco Scaioni, Vasil Yordanov, Maria Teresa Brunetti, Maria Teresa Melis, Angelo Zinzi, Zhizhong Kang, Paolo Giommi   +6 more
doaj   +1 more source

Population of Degrading Small Impact Craters in the Chang’E-4 Landing Area Using Descent and Ground Images

Remote Sensing, 2022
The landing camera (LCAM) of Chang’e-4 lander provides a series of low (46 cm/pixel) to high (2.3 cm/pixel) resolution images, which are suitable for centimeter-scale craters.
Teng Hu, Ze Yang, Zhizhong Kang, Hongyu Lin, Jie Zhong, Dongya Zhang, Yameng Cao, Haomin Geng   +7 more
doaj   +1 more source

Volcano‐Inspired Dual‐Carbon Network Aerogel for High‐Performance Solar Evaporation With Edge‐Directed Salt Crystallization and Recovery

Advanced Science, EarlyView.
A volcano‐inspired dual‐carbon aerogel featuring hierarchical conduits and an outer carbon‐fiber shell directs rapid water transport, confines heat, and enables directional salt migration. Radial temperature gradients in the conical structure trigger Marangoni‐driven edge‐localized salt crystallization while maintaining an unobstructed photothermal ...
Shuyue Feng, Yongpeng Wang, Mengzhu Liu, Xin Wang, Tao Jia, Haibo Zhang, Haoyue Wu, Yuan Xu, Linghui Kong   +8 more
wiley   +1 more source

A New Martian Crater Chronology: Implications for Jezero Crater [PDF]

The Astronomical Journal, 2021
Abstract Crater chronologies are a fundamental tool to assess the relative and absolute ages of planetary surfaces when direct radiometric dating is not available. Martian crater chronologies are derived from lunar crater spatial densities on terrains with known radiometric ages, and thus they critically depend on the Moon-to-Mars ...
openaire   +2 more sources

Ultra‐Low Intensity Continuous Wave Laser Ablation Propulsion With Graphene‐Engineered Wood

Advanced Science, EarlyView.
Graphene delignified wood converts continuous wave laser energy into thrust. Laser propulsion experiments in vacuum reveal the lowest laser ablation threshold intensities and the greatest density‐normalized specific impulse in literature. The results highlight graphene delignified wood as a potential efficient, sustainable, strong, and lightweight ...
Afnan S. M. Elmubasher, Rami Elkaffas, Mohamed Hamid Salim, Basel Altawil, Chanaka Sandaruwan, Shanavas Shajahan, Ahsan Baidar Bakht, Irfan Hussain, Blaise L. Tardy, Sean S. M. Swei, Yarjan Abdul Samad   +10 more
wiley   +1 more source

Morphological Features-Based Descriptive Index System for Lunar Impact Craters

ISPRS International Journal of Geo-Information, 2017
Lunar impact craters are important for studying lunar surface morphology because they are the most typical morphological units of the Moon. Impact crater descriptive indices can be used to describe morphological features and thus provide direct evidence ...
Min Chen, Mengling Lei, Danyang Liu, Yi Zhou, Hao Zhao, Kejian Qian   +5 more
doaj   +1 more source

Mark correlations: relating physical properties to spatial distributions [PDF]

, 2002
Mark correlations provide a systematic approach to look at objects both distributed in space and bearing intrinsic information, for instance on physical properties.
A. F. Heavens, A. J. Baddeley, A. J. S. Hamilton, A. L. Melott, A. Penttinen, B. Binggeli, B. P. Flannery, B. Widom, C. Arns, C. Beisbart, C. Benoist, C. Benoist, C. Willmer, D. Cox, D. G. Lambas, D. Hestens, D. J. Daley, D. Stoyan, D. Stoyan, D. Stoyan, D. Stoyan, D. Stoyan, D. Stoyan, D. Stoyan, E. Bertschinger, F. Sylos Labini, H. Löwen, H. Reichert, I. Szapudi, I. Szapudi, J. Lasenby, J. Møller, J. Ohser, J. P. Huchra, K. Mecke, L. Guzzo, L. I. Onuora, L. N. Costa da, M. F. Struble, M. F. Struble, M. Kerscher, M. Kerscher, M. N. M. Lieshout van, M. N. M. Lieshout van, M. Schlather, M. Ulmer, N. Cressie, N. G. Barlow, O. Wälder, O. Wälder, P. Coles, P. Coles, P. J. Diggle, P. J. E. Peebles, P. J. E. Peebles, P. Spanne, R. Balian, R. Capobianco, R. J. Adler, R. M. Sok, S. Djorgovski, S. Gottlöber, S. Gull, S. Hermit, T. M. Fuller, Y. Ogata, Y. Ogata   +66 more
core   +3 more sources

Stress‐to‐Light Conversion in an Earth‐Abundant Oxide Semiconductor

Advanced Science, EarlyView.
Stress‐to‐light conversion in solids represents a unique photonic functionality, yet it has never been realized in a chemically simple and sustainable material. Here, we show that sustainable semiconductor ZnO exhibits strong near‐infrared (NIR) luminescence under elastic stress when defect‐engineered to stabilize the p‐type state.
Tomoki Uchiyama, Koki Otonari, Reona Omori, Guangfa Yang, Eiji Nishibori, Ying Chen, Xu‐Guang Zheng, Chao‐Nan Xu   +7 more
wiley   +1 more source

Picosecond Laser Ablation of Polyhydroxyalkanoates (PHAs): Comparative Study of Neat and Blended Material Response [PDF]

, 2019
Polyhydroxyalkanoates (PHAs) have emerged as a promising biodegradable and biocompatible material for scaffold manufacturing in the tissue engineering field and food packaging. Surface modification is usually required to improve cell biocompatibility and/
Basnett, P., Basnett, P., Ortiz, R, Ortiz, R, Quintana, I., Quintana, I., Roy, I., Roy, I.   +7 more
core   +2 more sources