Results 61 to 70 of about 63,733 (300)

Triggered Ferroelectricity in HfO2 From Hybrid Phonons and Higher‐Order Dynamical Charges

Advanced Materials, EarlyView.
We combine first‐principles calculations, LGD theory and group theory to demonstrate the mechanism of hybrid‐triggered ferroelectricity in HfO2${\rm HfO}_2$, enabled by trilinear and quadlinear couplings between stable polar and nonpolar modes. HfO2${\rm HfO}_2$ hosts unconventional interplay between structure modes where substantial contribution to ...
Seongjoo Jung, Turan Birol
wiley   +1 more source

Chirality Transfer via Orientational Order of Micellar Assemblies on Gold Nanocrystals

Advanced Materials, EarlyView.
A mechanism for chiral growth of Au nanocrystals mediated by orientational order of chiral micelles at seed surfaces is demonstrated. 3D electron microscopy and molecular dynamics simulations reveal how alignment of the micelles along crystal directions and torsion–orientation coupling govern chirality transfer, providing a framework to rationalize ...
Robin Girod, Kyle Van Gordon, Fahim Faraji, Mikhail Mychinko, Francisco Bevilacqua, Cem Sevik, Milorad V. Milošević, Luis M. Liz‐Marzán, Sara Bals   +8 more
wiley   +1 more source

Advanced Design for Weakly Coupled Resonators by Automatic Active Optimization

Advanced Materials Technologies, EarlyView.
An Automatic Active Optimization (AAO) strategy integrates machine learning predictors and genetic algorithms in a closed‐loop workflow. By iteratively expanding its dataset with new discoveries, AAO overcomes the limits of conventional methods. This approach finds superior microstructural designs beyond the initial sample space. We demonstrate this on
Wei Yue, Yuan Gao, Fanping Sui, Jason Wang, Megan Teng, Peggy Tsao, Huicong Deng, Yande Peng, Liwei Lin   +8 more
wiley   +1 more source

High speed video capture for mobile phone cameras [PDF]

, 2012
We consider an electromechanical model for the operation of a voice coil motor in a mobile phone camera, with the aim of optimizing how a lens can be moved to a desired focusing motion. Although a methodology is developed for optimizing lens shift, there
Burke, M., Burns, S., Cook, S.P., Dellar, P.J., Dewynne, J., Hickey, C., Hjorth, P.G., Lee, W.T., Melnik, A., Moroney, K., Murphy, E., O'Callaghan, R., Vynnycky, M.   +12 more
core  

Dynamics of the Mammalian Placental Metabolome in Placentogenesis and Embryonic Development

Advanced Science, EarlyView.
This study identifies three metabolic stages (E8.5, E9.5–10.5, E11.5–14.5) and two transition periods (E8.5–9.5, E10.5–11.5) in mouse placental development. NAD(H) emerges as a key dynamic metabolite that enhances embryonic growth through accelerated segmentation and increased proliferation of mouse embryonic stem cell (mESC)‐induced presomitic ...
Gang Chen, Zichen Liu, Mengyi Wei, Qian Li, Liang Wu, Kunyuan Yu, Yanhong Xu, Dainan Yu, Wenwu Ma, Hongmei Wang, Ng Shyh‐Chang, Jinglei Zhai   +11 more
wiley   +1 more source

Optimization Method Based on the Minimum Action Principle for Trajectory Length of Articulated Manipulators

Technologies
In addition to the performance parameters of a mechanical manipulator—such as precision, repeatability, payload and maximum speed—path optimization can bring significant improvements in terms of cycle time and energy consumption.
Cozmin Adrian Cristoiu, Marius-Valentin Drăgoi, Andrei Mario Ivan, Roxana-Mariana Nechita, Iuliana Grecu, Roxana-Adriana Puiu, Gabriel Petrea, Popescu Emilia   +7 more
doaj   +1 more source

Early Radiation Therapy Response Assessment Using Multi‐Scale Photoacoustic Imaging

Advanced Science, EarlyView.
Tomographic and mesoscopic photoacoustics capture intratumoural features of radioresistance and response. ABSTRACT There is a critical unmet clinical need to identify biomarkers that predict and detect radiation therapy (RT) response in cancer. Using the unique capabilities of multi‐scale photoacoustic imaging (PAI) to depict tumor oxygenation and ...
Thierry L. Lefebvre, Mariam‐Eleni Oraiopoulou, Ellie V. Bunce, Thomas R. Else, Lorna C. Wright, Monika A. Golinska, Lina Hacker, Cara Brodie, Steven Kupczak, Yi Cheng, Lisa Young, Paul W. Sweeney, Sarah E. Bohndiek   +12 more
wiley   +1 more source

Development of a Damage Quantification Model for Composite Skin-Stiffener Structures [PDF]

, 2011
The development of a model-based approach for a damage severity assessment applied on a complex composite skin structure with stiffeners is presented in this paper.
Akkerman, R., Boer, A. de, Loendersloot, R., Ooijevaar, T.H.   +3 more
core   +1 more source

A Wearable Brain–Computer Interface for Mitigating Car Sickness via Attention Shifting

Advanced Science, EarlyView.
Car sickness poses a major challenge in vehicular travel, yet effective nonpharmacological solutions are scarce. We developed a wearable, closed‐loop mindfulness BCI that uses real‐time EEG‐based neurofeedback to shift attention away from motion‐induced discomfort. Validated in real‐car experiments involving >100$>100$ susceptible individuals, over 83%
Jiawei Zhu, Xiaoyu Bao, Qiyun Huang, Tao Wang, Li Huang, Haiyun Huang, Junbiao Zhu, Jun Qu, Kendi Li, Di Chen, Ya Jiang, Kailin Xu, Zijian Wang, Wei Wu, Yuanqing Li   +14 more
wiley   +1 more source

ANALYSIS OF EFFECTIVENESS OF THE MECHANICAL SHOCK ABSORBER PERFORMANCE

Известия высших учебных заведений: Нефть и газ, 2015
A design and the results of testing the mechanical shock absorber containing a body, in the bottom part of which there is a shaft forming together with a nut interacting with it via the spline joint a clearance is considered.
S. A. Sergeev, M. N. Mikhaylova
doaj   +1 more source