다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

Titanium Dioxide Nanomaterials: Synthesis, Properties, Modifications, and Applications

The richness of optical and electronic properties of graphene attracts enormous interest. Graphene has high mobility and optical transparency, in addition to flexibility, robustness and environmental stability. So far, the main focus has been on fundamental physics and electronic devices. However, we believe its true potential lies in photonics and optoelectronics, where the combination of its unique optical and electronic properties can be fully exploited, even in the absence of a bandgap, and the linear dispersion of the Dirac electrons enables ultrawideband tunability. The rise of graphene in photonics and optoelectronics is shown by several recent results, ranging from solar cells and light-emitting devices to touch screens, photodetectors and ultrafast lasers. Here we review the state-of-the-art in this emerging field.

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Graphene photonics and optoelectronics

Silver nanoparticles as antimicrobial agent: a case study on E. coli as a model for Gram-negative bacteria

Do Electromagnetic Waves Exist in a Short Cable? What Does Physics Say?

We describe recent research aimed at developing an all-solid-state smart window for energy-efficient buildings. The basic concept is to connect two pieces of glass, with complementary electrochromic coatings, by a transparent polymeric ion conductor which serves also as a lamination material. This Chapter reports data on the components of one specific design of this type, as well as some initial device results.

An electrochromic Li x WO 3 /polymer laminate/Liyv 2 O 5 device

Recently Gunn, Allison and Abbott (GAA) [http://arxiv.org/pdf/1402.2709v2.pdf] proposed a new scheme to utilize electromagnetic waves for eavesdropping on the Kirchhoff-law‐Johnson-noise (KLJN) secure key distribution. In a former paper [http://vixra.org/pdf/1403.0964v4.pdf], we proved that CAA's wave-based attack is unphysical. Here we address their experimental results regarding this attack. Our analysis shows that GAA virtually claim that they can identify, in a few correlation times that, from two Gaussian distributions with zero mean, which one is wider when their relative width difference is <10 -4 . Normally, such decision would need millions of correlations times to observe. We identify the experimental artifact causing this situation: existing DC current and/or ground loop (yielding slow deterministic currents) in the system. It is important to note that, while the GAA's cracking scheme, the experiments and the analysis are invalid, there is an important benefit of their attempt: our analysis implies that, in practical KLJN systems, DC currents ground loops or any other mechanisms carrying a deterministic current/voltage component must be taken care of to avoid information leak about the key.

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On the "cracking" experiments in gunn, allison, abbott, "a directional coupler attack against the kish key distribution system"

There is an ongoing debate about the fundamental security of existing quantum key exchange schemes. This debate indi cates not only that there is a problem with security but also that the meanings of perfect, imperfect, conditional and unconditional (information theoretic) security in physically secure key exchange schemes are often misunderstood. It has been shown recently that the use of two pairs of resistors with enhanced Johnsonnoise and a Kirchhoff-loop ‒ i.e ., a Kirchhoff-Law-Johnson-Noise (KLJN) protocol ‒ for secure key distribution leads to information theoretic security levels superior to those of today’s quan tum key distribution. This issue is becoming particularly timely because of the recent full cracks of practical quantum communicators, as shown in numerous peer- reviewed publications. The KLJN system is briefly surveyed here with discussions about the essential questions such as ( i) perfect and imperfect security characteristics of the key distribution, and ( ii ) how these two types of securities can be unconditional (or information theoretical).

/pdf/ucoditioal-security-by-the-laws-of-classical-phy-sics-1-43ntubbyf4.pdf

Ucoditioal security by the laws of classical phy sics 1

Thickness Dependence Simulations of the Optical Properties for a Suspended Particle Device Derived from Scattering and Absorption Coefficients

Claes-Göran Granqvist

Papers

Do Electromagnetic Waves Exist in a Short Cable? What Does Physics Say?

An electrochromic Li x WO 3 /polymer laminate/Liyv 2 O 5 device

On the "cracking" experiments in gunn, allison, abbott, "a directional coupler attack against the kish key distribution system"

Ucoditioal security by the laws of classical phy sics 1

Thickness Dependence Simulations of the Optical Properties for a Suspended Particle Device Derived from Scattering and Absorption Coefficients