Results 51 to 60 of about 7,157 (269)

Light‐Imprinted Chirality in Nanomaterials: From Principles to Applications

Advanced Science, EarlyView.
Light‐induced chirality represents a transformative paradigm for fabricating chiral nanostructures. This review provides a comprehensive framework encompassing light‐based strategies for imprinting and tuning chirality in nanomaterials, which guides researchers in harnessing light to create next‐generation functional materials.
Xinru Jin, Emiliano Cortés, Alexander O. Govorov, Tao Ding   +3 more
wiley   +1 more source

Spatial distribution and frequency of lightning activity and lightning flash density maps for Australia [PDF]

Journal of Geophysical Research: Atmospheres, 2006
The spatial distribution and frequency of lightning activity in Australia have been analyzed using lightning data obtained by ground‐based lightning detection instruments denoted CIGRE‐500 and CGR3 and by NASA satellite‐based instruments denoted OTD and LIS.
Kuleshov, Yuriy, Mackerras, David, Darveniza, Mat   +2 more
openaire   +4 more sources

MiR‐940 Suppresses Ferroptosis by Controlling Expression of Key Regulatory Genes

Advanced Science, EarlyView.
A CRISPR‐based screening identified miR‐940 as a critical suppressor of ferroptosis in cancer. By coordinating the downregulation of pro‐ferroptotic genes with the upregulation of GPX4, miR‐940 establishes a regulatory network that protects against ferroptosis and correlates with poor clinical outcomes in distinct cancer entities.
Andrea Kolak, Juliane Tschuck, Stefanie A. I. Weiß, Daniel Kaemena, Karolin Klimm, Ana Galhoz, Larissa Ringelstetter, Myles Fennell, Juliane Merl‐Pham, Anna Artati, Stefanie Strasser, Ralph Garippa, Michael Witting, Hans Zischka, Joel A. Schick, Stefanie M. Hauck, Michael P. Menden, Michelle Vincendeau, Brent R. Stockwell, Kamyar Hadian   +19 more
wiley   +1 more source

Stem Cell Differentiation Disperses Transcriptional Clusters via a Conserved Surface‐Condensate Trajectory

Advanced Science, EarlyView.
Stem cell differentiation follows a conserved surface condensate trajectory: H3K27ac super enhancers nucleate large RNA polymerase II clusters that grow and unfold before transcriptional activity disperses them. This work reveals how biophysical forces at enhancer surfaces dynamically build and dismantle stem cell transcription hubs, reshaping cell ...
Tim Klingberg, Irina Wachter, Agnieszka Pancholi, Matthias Akyel, Yomna Gohar, Priya Kumar, Ana Miguel Fernandes, Yuzhi Bao, Alica Schmidt‐Heydt, Marcel Piepers, Alicia Günthel, Marcel Sobucki, Elisa Kämmer, Süheyla Eroğlu‐Kayıkçı, Stephan Allgeier, Sylvia Erhardt, Vasily Zaburdaev, Carmelo Ferrai, Lennart Hilbert   +18 more
wiley   +1 more source

Rapid Sampling and Polarimetric Statistics of Lightning With a Phased Array Radar

Geophysical Research Letters
Previous studies of lightning detection by radar mostly consisted of observations with reflector‐antenna systems yielding slow volume scan times.
Vitor Goede, David Schvartzman, David Bodine, Vanna C. Chmielewski, Tian‐You Yu, Eric Bruning, Min‐Duan Tzeng, Michael Stock   +7 more
doaj   +1 more source

An Implantable Phototriggered Prodrug Depot Patch Enables Actively Programmable Drug Release for Post‐Myocardial Infarction Therapy

Advanced Science, EarlyView.
An implantable phototriggered prodrug depot patch (iPDP) is presented that enables actively programmable drug release post‐implantation. Covalently conjugated prodrug ensures minimal leakage; illumination parameters serve as a code to precisely control dose per release.
Haipeng Lu, Kaicheng Deng, Zhang Zhang, Qirui Wang, Weijing Gao, Liyin Shen, Lei Zhang, Wenting Hu, Yang Zhu, Zhengwei Mao, Tanchen Ren   +10 more
wiley   +1 more source

Insulator fault feature extraction system of substation equipment based on machine vision

IET Networks, EarlyView., 2022
Abstract The artificial intelligence technology and intelligent automation are more and more widely used, the insulators play a supporting and insulating role in the operation of the grid. The use of machine vision inspection technology to detect insulator faults has become an inevitable trend of the times.
Keruo Jiang, Qiaoqun Xia, Lijun Ma, Xin Xu, Zhipeng Shao   +4 more
wiley   +1 more source

The start of lightning: evidence of bidirectional lightning initiation [PDF]

, 2015
Lightning flashes are known to initiate in regions of strong electric fields inside thunderstorms, between layers of positively and negatively charged precipitation particles.
Van der Velde, Oscar Arnoud, Montañá Puig, Juan, Williams, Earle R., Montanya, Joan, van der Velde, Oscar   +4 more
core   +1 more source

Citizen Science Observation of a Gamma‐Ray Glow Associated With the Initiation of a Lightning Flash

Geophysical Research Letters, 2023
Gamma‐ray glows are observational evidence of relativistic electron acceleration due to the electric field in thunderclouds. However, it is yet to be understood whether such relativistic electrons contribute to the initiation of lightning discharges.
M. Tsurumi, T. Enoto, Y. Ikkatai, T. Wu, D. Wang, T. Shinoda, K. Nakazawa, N. Tsuji, G. S. Diniz, J. Kataoka, N. Koshikawa, R. Iwashita, M. Kamogawa, T. Takagaki, S. Miyake, D. Tomioka, T. Morimoto, Y. Nakamura, H. Tsuchiya   +18 more
doaj   +1 more source

3-Dimensional Lightning Observations Using a Time-of-Arrival Lightning Mapping System [PDF]

SAE Technical Paper Series, 2001
<div class="htmlview paragraph">A lightning mapping system has been developed that locates the sources of VHF radiation from lightning discharges in three spatial dimensions and time. The system consists of several VHF receivers distributed over an area of about 100 km diameter.
William Rison, Paul Krehbiel, Ron Thomas, Tim Hamlin, Jeremiah Harlin   +4 more
openaire   +1 more source