Results 81 to 90 of about 2,277,043 (331)

Rapid Fabrication of Self‐Propelled and Steerable Magnetic Microcatheters for Precision Medicine

Advanced Materials, EarlyView.
A rapid Joule heating fabrication method for the production of self‐propelling, adaptive microcatheters, with tunable stiffness and integrated microfluidic channels is presented. Demonstrated through three microrobotic designs, including a steerable guiding catheter, an untethered wave‐crawling TubeBot, and a distal‐end propelled microcatheter, it was ...
Zhi Chen, Boris Rivkin, David Castellanos‐Robles, Ivan Soldatov, Lukas Beyer, Mariana Medina‐Sánchez   +5 more
wiley   +1 more source

Metamaterial Antennas Enhance MRI of the Eye and Occipital Brain

Advanced Materials, EarlyView.
A radiofrequency antenna platform comprising planar and bend configurations is developed, incorporating structurally integrated epsilon‐negative metamaterial unit cells to enhance MRI. These antennas enable high‐resolution in vivo human MRI of the eye, orbit, and occipital brain. Comprehensive validation, including simulations, phantom experiments, SAR,
Nandita Saha, Bilguun Nurzed, Mostafa Berangi, Andre Kuehne, Helmar Waiczies, Igor Fabian Tellez Ceja, Xiang Hu, Thomas Gladytz, Lisa Krenz, Dave Huebler, Beate Endemann, Claudia Brockmann, Ebba Beller, Oliver Stachs, Thoralf Niendorf   +14 more
wiley   +1 more source

The Profits to Insider Trading: A Performance-Evaluation Perspective [PDF]

This paper estimates the profits to insiders when they trade their company's stock. We construct a rolling purchase portfolio' that holds all shares purchased by insiders over the previous year and an analogous sale portfolio' that holds all shares sold ...
Andrew Metrick, Leslie A. Jeng, Richard Zeckhauser   +2 more
core  

A modified Corrado test for assessing abnormal security returns [PDF]

, 2011
Event studies typically use the methodology developed by Fama et al. [19699. Fama , E. , Fisher , L. , Jensen , M. and Roll , R. 1969 . The adjustment of stock prices to new information . International Economic Review , 10 ( 1 ) : 1 – 21 .
Ataullah, Ali, Song, Xiaojing, Tippett, Mark   +2 more
core   +1 more source

Exploring the Potential of Zero‐Dimensional Carbon Nanomaterials in Photoluminescent, Electrochemiluminescent and Electrochemical Sensors

Advanced Materials Interfaces, EarlyView.
Zero‐dimensional carbon nanomaterials are presented as multifunctional platforms linking structure, property, and sensing performance. Surface engineering and heteroatom doping modulate electron‐transfer and luminescent behavior, enabling electrochemical, photoluminescent, and electrochemiluminescent detection. Fundamental design principles, analytical
Gustavo Martins, Jeferson Luiz Gogola, Ava Gevaerd, Cristiane Kalinke, Paulo Roberto de Oliveira, Fabio Roberto Caetano, Bruno Campos Janegitz, Márcio Fernando Bergamini, Luiz Humberto Marcolino‐Junior   +8 more
wiley   +1 more source

Revisiting the merger and acquisition performance of European banks [PDF]

The study examines the value creation of Merger and Acquisition (M&A) deals in European Banking from 1990-2004. This is performed, first, by examining the stock price reaction of banks to the announcement of M&A deals and, second, by analysing the ...
Asimakopoulos, Ioannis, Athanasoglou, Panayiotis P.   +1 more
core   +4 more sources

Effect of Corporate Social Responsibility Disclosures and Financial Information Against Abnormal Return (Empirical studies on food and beverage sub-sector manufacturing Companies listed on the Indonesia Stock Exchange for the period 2013 - 2017)

Media Ekonomi dan Manajemen, 2019
This study aims to find empirical evidence of the effect of disclosure of corporate social responsibility and financial information proxied by accounting profits and return on assets to abnormal returns in food and beverage sub-sector manufacturing ...
Suroto Suroto, Ch. Asta Nugraha
doaj   +1 more source

Market Reaction and Volatility in the Brazilian Stock Market [PDF]

We perform an event study to investigate stock returns associated to the announcement of equity issues by Brazilian firms between 1992 and 2003 aiming to determine the market reaction before, during, and after the issue announcement.
Alberto Shigueru Matsumoto, Otavio Ribeiro De Medeiros   +1 more
core  

Uncertainty triggers overreaction: evidence from corporate takeovers [PDF]

, 2016
Behavioural finance models suggest that under uncertainty, investors overweight their private information and overreact to it. We test this theoretical prediction in an M&A framework.
Black, Emma L., Guo, Jie, Hu, Nan, Vagenas-Nanos, Evangelos   +3 more
core   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source