Omnidirectionally Stretchable and Transparent Graphene Electrodes

Stretchable and transparent electrodes have been developed for applications in flexible and wearable electronics. For customer-oriented practical applications, the electrical and optical properties of stretchable electrodes should be independent of the directions of the applied stress, and such electrodes are called omnidirectionally stretchable electrodes. Herein, we report a simple and cost-effective approach for the fabrication of omnidirectionally stretchable and transparent graphene electrodes with mechanical durability and performance reliability. The use of a Fresnel lens-patterned electrode allows multilayered graphene sheets to achieve a concentric circular wavy structure, which is capable of sustaining tensile strains in all directions. The as-prepared electrodes exhibit high optical transparency, low sheet resistance, and reliable electrical performances under various deformation (<i>e</i>.<i>g</i>., bending, stretching, folding, and buckling) conditions. Furthermore, computer simulations have also been carried out to investigate the response of a Fresnel lens-patterned structure on the application of mechanical stresses. This study can be significant in a large variety of potential applications, ranging from stretchable devices to electronic components in various wearable integrated systems

Mitochondrial DNA haplogroup distribution in prostate cancer cases and controls in the Korean population.

<p>The parsimonious tree on the top shows the evolutionary relationship of 22 haplogroups; capital letter-number codes denote haplogroups, all mutations are indicated by the substituted nucleotides after the number. ^aProstate cancer; ^bNormal control; Exact test <i>P</i> value (s.e.) = 0.6064±(0.0374).</p

Clinicopathological characteristics of Korean prostate cancer patients and control groups surveyed here.

*<p>Mean age±SD.</p

Predicting Fluctuations in Cryptocurrency Transactions Based on User Comments and Replies

<div><p>This paper proposes a method to predict fluctuations in the prices of cryptocurrencies, which are increasingly used for online transactions worldwide. Little research has been conducted on predicting fluctuations in the price and number of transactions of a variety of cryptocurrencies. Moreover, the few methods proposed to predict fluctuation in currency prices are inefficient because they fail to take into account the differences in attributes between real currencies and cryptocurrencies. This paper analyzes user comments in online cryptocurrency communities to predict fluctuations in the prices of cryptocurrencies and the number of transactions. By focusing on three cryptocurrencies, each with a large market size and user base, this paper attempts to predict such fluctuations by using a simple and efficient method.</p></div

Analysis of association between prostate cancer risk and the mtDNA haplogroups in this study.

<p>Abbreviations: CI, confidence interval; OR, odds ratio.</p><p>Each haplogroup (hg) was first tested separately and then each phylogenetically-combined group was also tested.</p>*<p>The Fisher exact test of proportions.</p

Statistical significance (p-values) of bivariate Granger causality correlation for Bitcoin price and community opinion.

<p>Statistical significance (p-values) of bivariate Granger causality correlation for Bitcoin price and community opinion.</p

System overview.

<p>System overview.</p

Experimental result of predicted Ripple price fluctuation.

<p>Experimental result of predicted Ripple price fluctuation.</p

Experimental result of predicted Ethereum fluctuation.

<p>Experimental result of predicted Ethereum fluctuation.</p

Increment/decrement in the amount of simulated investment in Bitcoin.

<p>Increment/decrement in the amount of simulated investment in Bitcoin.</p