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CLAS Collaboration,Pereira, S.A.,Mirazita, M.,Rossi, P.,De Sanctis, E.,Niculescu, G.,Niculescu, I.,Stepanyan, S.,Adhikari, K.P.,Aghasyan, M.,Anghinolfi, M.,Baghdasaryan, H.,Ball, J.,Battaglieri, M.,Be North-Holland Pub. Co 2010 Physics letters: B Vol.688 No.4
<P>Differential cross sections of the reaction gamma d -> K+Sigma(-)(p) have been measured with the CLAS detector at Jefferson Lab using incident photons with energies between 1.1 and 3.6 GeV. This is the first complete set of strangeness photoproduction data on the neutron covering a broad angular range. At energies close to threshold and up to E-gamma similar to 1.8 GeV. the shape of the angular distribution is suggestive of the presence of s-channel production mechanisms. For E-gamma > 1.8 GeV, a clear forward peak appears and becomes more prominent as the photon energy increases, suggesting contributions from t-channel production mechanisms. These data can be used to constrain future analysis of this reaction. (c) 2010 Elsevier B.V. All rights reserved.</P>
Evidence for universality of tunable-barrier electron pumps
Giblin, Stephen P,Fujiwara, Akira,Yamahata, Gento,Bae, Myung-Ho,Kim, Nam,Rossi, Alessandro,Mö,ttö,nen, Mikko,Kataoka, Masaya BUREAU INTERNATIONAL DES POIDS ET MESURES 2019 METROLOGIA -BERLIN- Vol.56 No.4
<P>We review recent precision measurements on semiconductor tunable-barrier electron pumps operating in a ratchet mode. Seven studies on five different designs of pumps have reported measurements of the pump current with relative total uncertainties around 10<SUP>−6</SUP> or less. Combined with theoretical models of electron capture by the pumps, these experimental data exhibits encouraging evidence that the pumps operate according to a universal mechanism, independent of the details of device design. Evidence for robustness of the pump current against changes in the control parameters is at a more preliminary stage, but also encouraging, with two studies reporting robustness of the pump current against three or more parameters in the range of ∼<img ALIGN='MIDDLE' ALT='' SRC='http://ej.iop.org/images/0026-1394/56/4/044004/metab29a5ieqn001.gif'/> to ∼<img ALIGN='MIDDLE' ALT='' SRC='http://ej.iop.org/images/0026-1394/56/4/044004/metab29a5ieqn002.gif'/>. This review highlights the need for an agreed protocol for tuning the electron pump for optimal operation, as well as more rigorous evaluations of the robustness in a wide range of pump designs.</P>
THESEUS: A key space mission concept for Multi-Messenger Astrophysics
Stratta, G.,Ciolfi, R.,Amati, L.,Bozzo, E.,Ghirlanda, G.,Maiorano, E.,Nicastro, L.,Rossi, A.,Vinciguerra, S.,Frontera, F.,Gö,tz, D.,Guidorzi, C.,O’Brien, P.,Osborne, J.P.,Tanvir, N.,Branchesi, M. Elsevier 2018 ADVANCES IN SPACE RESEARCH Vol.62 No.3
<P><B>Abstract</B></P> <P>The recent discovery of the electromagnetic counterpart of the gravitational wave source GW170817, has demonstrated the huge informative power of multi-messenger observations. During the next decade the nascent field of multi-messenger astronomy will mature significantly. Around 2030 and beyond, third generation ground-based gravitational wave detectors will be roughly ten times more sensitive than the current ones. At the same time, neutrino detectors currently upgrading to multi km<SUP>3</SUP> telescopes, will include a 10 km<SUP>3</SUP> facility in the Southern hemisphere. In this review, we describe the most promising sources of high frequency gravitational waves and neutrinos that will be detected in the next two decades. In this context, we show the important role of the <I>Transient High Energy Sky and Early Universe Surveyor</I> (THESEUS), a mission concept accepted by ESA for phase A study and proposed by a large international collaboration in response to the call for the Cosmic Vision Programme M5 missions. THESEUS aims at providing a substantial advancement in early Universe science as well as in multi–messenger and time–domain astrophysics, operating in strong synergy with future gravitational wave and neutrino detectors as well as major ground- and space-based telescopes. This review is an extension of the THESEUS white paper (Amati et al., 2017), also in light of the discovery of GW170817/GRB170817A that was announced on October 16th, 2017.</P>
Agrestini, S.,Kuo, C.-Y.,Moretti Sala, M.,Hu, Z.,Kasinathan, D.,Ko, K.-T.,Glatzel, P.,Rossi, M.,Cafun, J.-D.,Kvashnina, K. O.,Matsumoto, A.,Takayama, T.,Takagi, H.,Tjeng, L. H.,Haverkort, M. W. American Physical Society 2017 Physical review. B Vol.95 No.20
<P>We have investigated the electronic structure of Sr2IrO4 using core-to-core resonant inelastic x-ray scattering. The experimental spectra can be well reproduced using ab initio density functional theory based multiplet ligand field theory calculations, thereby validating these calculations. We found that the low-energy, effective Ir t(2g) orbitals are practically degenerate in their crystal-field energy. We uncovered that Sr2IrO4 and iridates in general are negative charge transfer systems with large covalency and a substantial oxygen ligand hole character in the Ir t(2g) Wannier orbitals. This has far reaching consequences, as not only the on-site crystal-field energies are determined by the long-range crystal structure, but, more significantly, magnetic exchange interactions will have long-range distance dependent anisotropies in the spin direction. These findings set constraints and show pathways for the design of d(5) materials that can host compasslike magnetic interactions.</P>
Benzothiazinones Kill Mycobacterium tuberculosis by Blocking Arabinan Synthesis
Makarov, V.,Manina, G.,Mikusova, K.,Mollmann, U.,Ryabova, O.,Saint-Joanis, B.,Dhar, N.,Pasca, M. R.,Buroni, S.,Lucarelli, A. P.,Milano, A.,De Rossi, E.,Belanova, M.,Bobovska, A.,Dianiskova, P.,Kordula American Association for the Advancement of Scienc 2009 Science Vol.324 No.5928
<P>New drugs are required to counter the tuberculosis (TB) pandemic. Here, we describe the synthesis and characterization of 1,3-benzothiazin-4-ones (BTZs), a new class of antimycobacterial agents that kill Mycobacterium tuberculosis in vitro, ex vivo, and in mouse models of TB. Using genetics and biochemistry, we identified the enzyme decaprenylphosphoryl-beta-d-ribose 2'-epimerase as a major BTZ target. Inhibition of this enzymatic activity abolishes the formation of decaprenylphosphoryl arabinose, a key precursor that is required for the synthesis of the cell-wall arabinans, thus provoking cell lysis and bacterial death. The most advanced compound, BTZ043, is a candidate for inclusion in combination therapies for both drug-sensitive and extensively drug-resistant TB.</P>
Wire-based robots for upper-limb rehabilitation
G. Rosati,P. Gallina,A. Rossi,S. Masiero 한국과학기술원 인간친화 복지 로봇 시스템 연구센터 2006 International Journal of Assistive Robotics and Me Vol.7 No.2
In the last decades, many specialized research centers attempted to employ robots in the rehabilitation field. Especially orthopedic rehabilitation and neurorehabilitation benefited from these cutting-edge technologies. Although a broad literature on the benefits of robot-assisted rehabilitation assesses the effectiveness of the direction taken by scientists, only in few cases a robotic lab-oriented prototype leaded to a commercial robot. This apparent contradiction should not deter researchers from continuing improving robotic tools and related rehabilitation protocols. On the contrary, it should be a starting point for a new generation of rehabilitation robots capable of shrinking the gap between academic lab-oriented ideas and affordable clinical solutions.<BR> According to this philosophy, several underrated problems are to be taken into account. In particular a rehabilitation robot has to be cost-affordable, lightweight, easily transportable and equipped with a user-friendly interface suitable for non trained operators. Moreover, not only safety issues need to be fully addressed but also the tolerability of the robot by the patient.<BR> Starting from these considerations, a new generation of wire-based robots for upper-limb rehabilitation is proposed. In particular, the work focuses on 2 wire?based prototypes which can be classified according to the number of degrees of freedom (DoF): the NeReBot (NEuroREhabilitation roBOT, 3 DoF) and the MariBot (MARIsa roBOT, 5 DoF). Experimental results performed in a clinical environment showed the effectiveness of the wire-based robot-assisted rehabilitation. At the same time, they helped to trace new guidelines for future work.
Modelling the redshift-space three-point correlation function in SDSS-III
Guo, Hong,Zheng,Jing, Y. P.,Zehavi, Idit,Li, Cheng,Weinberg, David H.,Skibba, Ramin A.,Nichol, Robert C.,Rossi, Graziano,Sabiu, Cristiano G.,Schneider, Donald P.,McBride, Cameron K. Oxford University Press 2015 Monthly notices of the Royal Astronomical Society. Vol.449 No.1
A.A. KONCHITS,F.V. MOTSNYI,S.P. KOLESNIK,E. TAMBURRI,S. ORLANDUCCI,D. PASSERI,M. ROSSI 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2008 NANO Vol.3 No.3
Poly(ortho-anisidine) (POA)/single walled carbon nanotubes (SWCNTs) composite films have been prepared by means of oxidative potentiostatic electropolymerization of the monomer (ortho-anisidine) in the presence of purified SWCNTs. The magnetic properties of the obtained films have been investigated by electron spin resonance (ESR) (9.4 GHz; temperature range 10-300 K) and compared with those of pure POA films in the same oxidation state. The similarity of the ESR signals and the dependence on temperature of the ESR line features suggest a polaron origin of the paramagnetic states. A strong increase of the ESR integral intensity has been detected for composite samples kept for 72 h in hydrogen atmosphere at room temperature. Under the same conditions, a less pronounced increase of the intensity has been detected in the case of pure polymer films. The kinetics of the hydrogen adsorption - desorption processes in the nanocomposite samples has been investigated and interpreted in the frame of an H-physisorption mechanism. The comparison between the H-induced effects in POA and nanocomposite POA/SWCNTS films has been carried out taking into account the structure of the samples and the presence of defects.