Results 1 to 10 of about 13,340 (137)

Enhanced Spectral Tunability by Sub-10 nm Nanogaps in Graphene-Metal Hybrid Metasurfaces. [PDF]

Adv Sci (Weinh)
A tunable mid‐infrared metasurface integrating graphene and metal antenna arrays with sub‐10 nm nanogaps is presented, overcoming the ≈20 nm limit of conventional fabrication. The enhanced spectral tuning range and modulation depth are enabled by combining electron‐beam lithography, thin metal deposition, and directional ion milling to precisely define
Han F, Lin Z, Pilarczyk K, Tang H, Vandenbosch GAE, de Vondel JV, Zheng X, Verellen N, Janssens E.   +8 more
europepmc   +2 more sources

Multi-Material 3D and 4D Printing: A Survey. [PDF]

Adv Sci (Weinh), 2020
The present work reviews the state of the art in multi‐material 3D and 4D (time as the fourth dimension) printing with a special focus on polymers, ceramics and their associated composites as printing materials. This review‐type article compares the advantages and limitations of various multi‐material 3D and 4D printing technologies, represents many ...
Rafiee M, Farahani RD, Therriault D.
europepmc   +2 more sources

Development of 3D‐Printed Magnetic Micro‐Nanorobots for Targeted Therapeutics: the State of Art

Advanced NanoBiomed Research, Volume 3, Issue 10, October 2023., 2023
Micro‐/nanorobots show great potential in enabling innovative bio‐applications. The developments in magnetic micro‐/nanorobots regarding their materials, fabrications, actuations, and applications are discussed in this article. Herein, it is aimed to discover the limitations of the existing works and to identify the knowledge gap, thereby deriving ...
Ningning Hu, Lujia Ding, Yuyi Liu, Kemin Wang, Bing Zhang, Ruixue Yin, Wenju Zhou, Zhuming Bi, Wenjun Zhang   +8 more
wiley   +1 more source

Overview of frequency control techniques in power systems with high inverter‐based resources: Challenges and mitigation measures

IET Smart Grid, Volume 6, Issue 5, Page 447-469, October 2023., 2023
Power systems are transitioning towards a higher proportion of inverter‐based resources. This leads to the loss of synchronous generators and their associated control mechanisms. To address low inertia challenges, new international fast frequency response services are established, and renewable enabling technologies and sources are investigated to ...
Dlzar Al Kez, Aoife M. Foley, Faraedoon Ahmed, D. John Morrow   +3 more
wiley   +1 more source

UTILIZATION OF METADATA FOR QUALITY ASSURANCE IN THE INTERNATIONAL SHARING AND REUSE OF OPEN EDUCATIONAL RESOURCES [PDF]

AAOU Journal, 2010
In order to sustain the development and utilization of learning content under the limited financial and human resources, the sharing and reuse of open educational resources (OERs) have been promoted in various school levels and disciplines.
Tsuneo Yamada, Yosuke Morimoto
doaj   +1 more source

Application of Wavelet Packet and Fuzzy Algorithm in Power System Short Circuit Fault Classification

Mathematical Problems in Engineering, Volume 2022, Issue 1, 2022., 2022
Short‐circuit fault, also known as a lateral fault, is one of the common types of faults in power transmission lines. This paper proposes an accurate method for identifying short‐circuit fault types for power transmission line systems. According to the three‐phase A, B, and C values, short‐circuit faults can be subdivided into ten classes. An MDL power
Guangping Qiu, Ricardo Fabricio Escobar Jiménez   +1 more
wiley   +1 more source

A Scalable Blockchain Framework for ELA Assessment

Advances in Multimedia, Volume 2022, Issue 1, 2022., 2022
As a popular technology in the information age, blockchain is having a profound impact on various industries, including the field of education. Blockchain technology can accelerate the modernization of education in China, adapt to the new situation of epidemic prevention and control needs, and promote the renewal of the management and training modes of
Chunxia Tian, Qiangyi Li
wiley   +1 more source

Experimental Harmonics Analysis of UPS (Uninterrupted Power Supply) System and Mitigation Using Single‐Phase Half‐Bridge HAPF (Hybrid Active Power Filter) Based on Novel Fuzzy Logic Current Controller (FLCC) for Reference Current Extraction (RCE)

Advances in Fuzzy Systems, Volume 2022, Issue 1, 2022., 2022
UPS Uninterruptible power supply) is used as backup when the input source, usually the national grid, fails to give power to a load. In addition to the growing use of electronic power devices in industrial and residential systems, such as UPS, controlled rectifiers, SMPS (Switch Mode Power Supplies), and DC Converters, there is a serious problem caused
Mahendar Kumar, M.A Uqaili, Z.A Memon, Bhagwan Das, Mohammad A. Chowdhury   +4 more
wiley   +1 more source

3D‐Printed Triboelectric Nanogenerators: State of the Art, Applications, and Challenges

Advanced Energy and Sustainability Research, Volume 2, Issue 3, March 2021., 2021
Herein the recent developments in triboelectric nanogenerators (TENGs) fabricated using 3D‐printing technologies are highlighted. Material functionalization, device structure formation, optimal energy harvesting, system integration, and translation to commercial market are covered.
M. A. Parvez Mahmud, Ali Zolfagharian, Saleh Gharaie, Akif Kaynak, Shahjadi Hisan Farjana, Amanda V. Ellis, Jun Chen, Abbas Z. Kouzani   +7 more
wiley   +1 more source

The State of the Art of Spatial Interfaces for 3D Visualization

Computer Graphics Forum, Volume 40, Issue 1, Page 293-326, February 2021., 2021
We survey the state of the art of spatial interfaces for 3D visualization. Interaction techniques are crucial to data visualization processes and the visualization research community has been calling for more research on interaction for years. Yet, research papers focusing on interaction techniques, in particular for 3D visualization purposes, are not ...
Lonni Besançon, Anders Ynnerman, Daniel F. Keefe, Lingyun Yu, Tobias Isenberg   +4 more
wiley   +1 more source