Results 81 to 90 of about 261,108 (323)

Dilations for operator-valued quantum measures [PDF]

arXiv, 2021
This paper concerns the dilations of Banach space operator-valued quantum measures. While the recently developed general dilation theory can lead to a projection (idempotent) valued dilation for any quantum measure over the projection lattice for a von Neumann algebra that dose not contain type $I_{2}$ direct summand, such a dilation does not ...
arxiv  

Enhancing Ultrasound Power Transfer: Efficiency, Acoustics, and Future Directions

Advanced Materials, EarlyView.
Implantable devices significantly enhance healthcare but are limited by battery life. Ultrasound power transfer technology offers a promising solution for sustainable operation. This review addresses gaps in current research, particularly in sound field analysis and energy efficiency optimization.
Yi Zheng, Zhuomin Zhang, Yanhu Zhang, Qiqi Pan, Xiaodong Yan, Xuemu Li, Zhengbao Yang   +6 more
wiley   +1 more source

A CARDIOSPASM DILATOR [PDF]

Journal of the American Medical Association, 1917
The cardiospasm dilator described here was developed to meet certain exigencies in the treatment of cardiospasm cases. It was made by using an ordinary stomach tube of small diameter and attaching to its end the tapering tip of a small bougie. A rubber balloon was then fastened about the tube and bougie end, as shown.
openaire   +3 more sources

Cardiac Organoid Model Inspired Micro‐Robot Smart Patch to Treat Myocardial Infarction

Advanced Materials, EarlyView.
The heart organoid model exhibits the acidic microenvironment characteristic of myocardial infarction, which emerges as a pivotal force propelling the movement of micro‐robots. These micro‐robots, administered through microneedles, can penetrate deep into the tissue, effectively delivering therapeutic payloads to facilitate heart repair.
Fangfang Wang, Zilu Xu, Feiyang Zheng, Dongcheng Yang, Kaige Xu, Ming Ke, Xiao Zhou, Xiaohan Zhang, Ju Tan, Yong Liu, Yansha Hao, Malcolm Xing, Chuhong Zhu   +12 more
wiley   +1 more source

Apport des moyens endoscopiques dans la dilatation des sténoses caustiques de l'ésophage

The Pan African Medical Journal, 2016
INTRODUCTION: toutes les sténoses symptomatiques de l'ésophage peuvent être dilatées par voie endoscopique. Nous évaluons l'apport des moyens endoscopiques dans la prise en charge de la dilatation ésophagienne pour sténose caustique de l'ésophage (SCO ...
Togo Seydou, Ouattara Moussa Abdoulaye, Li xing, Sanogo Zimogo Zi, Koumaré sekou, Yang Shang Wen, Sankare Ibrahim, Toure Cheik Ahmed Sekou, Maiga Ibrahim Boubacar, Jacque Saye, Dakouo Dodino Jerome, Toure Ousmane Dantoumé, Yena Sadio   +12 more
doaj   +1 more source

Regular Dilation and Nica-covariant Representation on Right LCM Semigroups [PDF]

arXiv, 2017
Regular dilation has recently been extended to graph product of $\mathbb{N}$, where having a *-regular dilation is equivalent to having a minimal isometric Nica-covariant dilation. In this paper, we first extend the result to right LCM semigroups, and establish a similar equivalence among *-regular dilation, minimal isometric Nica-covariant dilation ...
arxiv  

DILATATION OF THE STOMACH. [PDF]

JAMA: The Journal of the American Medical Association, 1897
I place before you, this morning, a patient whose sallow complexion and expression of distress declare him to be a sufferer from chronic disease. He is about 50 years of age, though his whitened locks and bald crown seem to indicate a greater number of years.
openaire   +2 more sources

Materials Advances in Devices for Heart Disease Interventions

Advanced Materials, EarlyView.
This review examines the crucial role of materials in heart disease interventions, focusing on strategies for monitoring, managing, and repairing heart conditions. It discusses the material requirements for medical devices, highlighting recent innovations and their impact on cardiovascular health.
Gagan K. Jalandhra, Lauryn Srethbhakdi, James Davies, Chi Cong Nguyen, Phuoc Thien Phan, Zachary Och, Aditya Ashok, Khoon S. Lim, Hoang‐Phuong Phan, Thanh Nho Do, Nigel H. Lovell, Jelena Rnjak‐Kovacina   +11 more
wiley   +1 more source

A simple stress-dilatancy equation for sand [PDF]

arXiv, 2020
The stress-dilatancy relation is of critical importance for constitutive modelling of sand. A new fractional-order stress-dilatancy equation is analytically developed in this study, based on stress-fractional operators. An apparent linear response of the stress-dilatancy behaviour of soil after sufficient shearing is obtained.
arxiv  

Manipulating the Assembly and Architecture of Fibrillar Silk

Advanced Materials, EarlyView.
In this study, advanced in situ AFM, PiFM, and Cryo‐EM are leveraged to realize in situ observations of nucleation, growth, and degradation of silk nanofibrils. A clear picture of the assembly and structural evolution of regenerated silk nanofibrils is defined and demonstrates a novel strategy for manipulating their structure and properties, which ...
Chenyang Shi, Yuna Bae, Mingyi Zhang, James J. De Yoreo   +3 more
wiley   +1 more source