Results 251 to 260 of about 7,400,431 (309)

Review of Gastrointestinal Capsule Robots: Materials, Actuation, Diagnostics, and Therapeutics

Advanced Science, EarlyView.
This review examines gastrointestinal capsule robots through a systems engineering lens, covering shell materials, actuation and localization strategies, diagnostic modalities, therapeutic interventions, and commercialization status. By mapping the complete technological chain from fabrication to clinical deployment, this work identifies critical gaps ...
Zengsheng Li, Zhongguo Ren, Yiliang Lin, Xianfeng Xia, Tianlong Li, Kai Fung Chan, Philip Wai Yan Chiu, Wei Peng Yong, Mengmeng Sun   +8 more
wiley   +1 more source

Multispectral UV Imaging on Capacitive CMOS Arrays Enabled by Solution‐Processed Metal‐Oxide Nanoparticles

Advanced Science, EarlyView.
Ultraviolet (UV) imagers are important for a variety of applications but often require dedicated semiconductor process flows. Here, a versatile capacitive CMOS platform is transformed into a visible‐blind, multispectral UV imager through post‐CMOS functionalization with solution‐processed metal‐oxide nanoparticles. The UV‐induced photodielectric effect
Suman Kundu, Tao Shen, Kai Betlem, Murali K. Ghatkesar, Peter G. Steeneken, Frans P. Widdershoven   +5 more
wiley   +1 more source

Anchor Engineering of Hole‐Selective Enamine‐Based Self‐Assembling Monolayers for Perovskite Solar Cells

Advanced Science, EarlyView.
This work presents novel enamine‐based self‐assembling monolayers with engineered anchoring groups as hole‐selective contacts for inverted perovskite solar cells. The conjugated molecular design suppresses interfacial defects, optimizes charge extraction, and prevents aggregation.
Deimante Krisiune, Yuxuan Yang, Yongde Xu, Hao Tian, Chuanxiao Xiao, Jianxing Xia, Mahan Saberi Zafarghandi, Ali Keshavarz Mohammadian, Negar Ashari Astani, Kasparas Rakstys, Yi Zhang, Vytautas Getautis   +11 more
wiley   +1 more source

Multi‐Scale Bionic Structure Constructs Biomass Flame‐Retardant Thermal Insulation Foam Material

Advanced Science, EarlyView.
Inspired by mussel adhesion and hierarchical brick‐and‐mortar architectures, a cellulose‐based biomimetic foam is constructed by anchoring bentonite nanosheets onto a polydopamine‐decorated cellulose nanofiber network. The resulting foam combines low thermal conductivity with intrinsic flame retardancy and full biodegradability, presenting a ...
Jianming Liao, Lijun Fan, Yunyuan Dong, Xuyu Bao, Xiaobin Chen, Qifu Zheng, Guanqing Zhang, Shen Wang, Wei Chen, Min Zhang, Shuaiming He   +10 more
wiley   +1 more source

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Radiation Is Not the Only Risk

American Journal of Roentgenology, 2011
Clinical diagnosis has been dramatically altered by technologic advances and is now often based almost exclusively on imaging. The clinician must mindfully weigh patient-specific risks of radiation against the values of diagnostic yield and avoiding other risks.
Stephen, Balter, Pat, Zanzonico, George R, Reiss, Jeffrey W, Moses   +3 more
openaire   +2 more sources

Radiation and Other Risks

Journal of Occupational and Environmental Medicine, 1965
AbstractToday's maximum permissible levels for radiation exposure have been arrived at, over a period of some forty years, by a process of fairly arbitrary judgements combined with increasing practical operating experience.
openaire   +2 more sources

Quantifying Radiation Risks

Radiation Protection Dosimetry, 1999
The multi-attribute approach used by the International Commission on Radiological Protection to quantify aggregated detriment is discussed. Using the nominal probability coefficients derived, a dose limit was chosen for a given set of practices, above which the consequences to the individual would be widely regarded as unacceptable.
openaire   +2 more sources

Radiation risks in perspective

The British Journal of Radiology, 1987
The main difficulty in presenting radiation risks in their proper perspective is that they must, in most cases, be estimated predictively. This contrasts with most other occupational and public risks, of which the magnitude and severity are known from past records and experience.
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Radiation: the risks and the benefits

American Journal of Roentgenology, 1983
A general overview of the risks and benefits of the use of radiation in medicine and the nuclear industry is presented. The diagnositic and therapeutic uses of radioactive substances are explained, and a brief history of radiation medicine is given. (KRM)
openaire   +2 more sources

Radiation risk estimation

Science of The Total Environment, 1992
Estimation of the risk of cancer following exposure to ionizing radiation remains largely empirical, and the models used to adduce risk incorporate few, if any, of the advances in molecular biology of the past decade or so. These facts compromise the estimation of risk where the epidemiological data are weakest, namely, at low doses and dose rates ...
openaire   +2 more sources