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High-energy Variability of PSR J1311-3430
An, Hongjun,Romani, Roger W.,Johnson, Tyrel,Kerr, Matthew,Clark, Colin J. American Astronomical Society 2017 The Astrophysical Journal Vol.850 No.1
<P>We have studied the variability of the black-widow-type binary millisecond pulsar PSR J1311-3430 from optical to gamma-ray energies. We confirm evidence for orbital modulation in the weak off-pulse greater than or similar to 200 MeV emission, with a peak at phi(B) approximate to 0.8, following pulsar inferior conjunction. The peak has a relatively hard spectrum, extending above similar to 1 GeV. XMM-Newton and Swift UV observations also show that this source's strong X-ray flaring activity is associated with optical/UV flares. With a duty cycle of similar to 7%-19%, this flaring is quite prominent with an apparent power-law intensity distribution. Flares are present at all orbital phases, with a slight preference for phi(B) = 0.5-0.7. We explore possible connections of these variabilities with the intrabinary shock and magnetic activity on the low-mass secondary.</P>
Comparison of the genome profiles between head and body lice
Kang, J.S.,Cho, Y.J.,Kim, J.H.,Kim, S.H.,Yoo, S.,Noh, S.J.,Park, J.,Yoon, K.S.,Marshall Clark, J.,Pittendrigh, B.R.,Chun, J.,Lee, S.H. 한국응용곤충학회 2015 Journal of Asia-Pacific Entomology Vol.20 No.3
The body louse (Pediculus humanus humanus) is known to have diverged from the head louse (P. humanus capitis) but genomic differences between these two subspecies still remain unexplored. To compare genomic profiles between head and body lice, whole genome sequences of head lice were determined by next generation sequencing methods based on both Illumina Genome analyzer and Roche GS FLX pyrosequencing and compared with the reference genome sequences of the body louse. Total consensuses generated by mapping to the body louse genome in conjunction with de novo assembly of head louse genome sequences revealed a head louse genome size of 110Mbp with a 96% coverage of the body louse genome sequences. A total of 12,651 genes were predicted from the head louse genome sequences although more precise assembly and functional annotation of the genome is required for a more accurate gene count. Among the 873 genes that were putatively specific to the head louse, 15 genes were confirmed to be transcribed in both head and body lice, suggesting the previously estimated gene number of the body louse was likely underestimated. The single nucleotide polymorphism analysis showed that the nucleotide diversity of genome between head and body lice was 2.2%, which was larger than that of the transcriptome between head and body lice. An endosymbiont genome analysis showed that the composition of endosymbionts in head lice was similar to that of body lice and Candidatus Riesia pediculicola was the primary endosymbiont in both head and body lice.
Clark, D. J.,Le, C. T.,Senthilkumar, V.,Ullah, F.,Cho, H.-Y.,Sim, Y.,Seong, M.-J.,Chung, K.-H.,Kim, Y. S.,Jang, J. I. American Institute of Physics 2015 Applied Physics Letters Vol.107 No.13
<P>We have investigated the second-order nonlinear optical (NLO) properties of CVD-grown MoS2 monolayer (ML) transferred onto transparent substrates such as fused silica and polyethylene terephthalate. The physical properties of the transferred MLs were characterized by optical and NLO methods. We measured the second-order susceptibility chi((2)) in the spectral range of lambda = 1064-1600 nm in which the corresponding second harmonic radiation resonates with the exciton levels. It was found that chi((2)) is strongly enhanced by up to a factor of 5 near the A-and B-exciton levels due to two-photon resonance. The absolute chi((2)) values of our samples determined by both reflection and transmission geometry are on par with that of as-grown MLs. Our results imply that the cavity-confinement scheme can be employed for maximizing the nonlinear optical efficiency of atomically thin transition metal dichalcogenides for transparent/flexible optoelectronics applications, especially when oriented stacking of transferred MLs are controllable. (C) 2015 AIP Publishing LLC.</P>
Clark, Jeffrey J. 東國大學校 大學院 法學科 商事法 2001 商事法 세미나 Vol.10 No.-
Compaq v. Horton 사건은 델라웨어에서 델라웨어법 section220에 따른 주식원장과 주주명부의 열람에 대한 기준을 명확히 하였다. Compaq 사건에서. 법원은 어떤 제한이 남아 있기는 하지만. 주주에게 이러한 목록의 열람에 대해 광범위한 재량을 주었다. 결과적으로. 그 문은 무엇이 "적당한 목적"을 구성하는가에 관하여 앞으로의 소송에 열려있다.
Shape Control of QDs Studied by Cross-sectional Scanning Tunneling Microscopy
J. G. Keizer,M. Bozkurt,J. Bocquel,P. M. Koenraad,T. Mano,T. Noda,K. Sakoda,E. C. Clark,M. Bichler,G. Abstreiter,J. J. Finley,W. Lu,T. Rohel,H. Folliot,N. Bertru 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.58 No.51
In this cross-sectional scanning tunneling microscopy study we investigated various techniques to control the shape of self-assembled quantum dots (QDs) and wetting layers (WLs). The result shows that application of an indium flush during the growth of strained InGaAs/GaAs QD layers results in flattened QDs and a reduced WL. The height of the QDs and WLs could be controlled by varying the thickness of the first capping layer. Concerning the technique of antimony capping we show that the surfactant properties of Sb result in the preservation of the shape of strained InAs/InP QDs during overgrowth. This could be achieved by both a growth interrupt under Sb flux and capping with a thin GaAsSb layer prior to overgrowth of the uncapped QDs. The technique of droplet epitaxy was investigated by a structural analysis of strain free GaAs/AlGaAs QDs. We show that the QDs have a Gaussian shape, that the WL is less than 1 bilayer thick, and that minor intermixing of Al with the QDs takes place.