CCM.G-K2 key comparison

open55sìIn November 2013 an International Key Comparison, CCM.G-K2, was organized in the Underground Laboratory for Geodynamics in Walferdange. The comparison has assembled 25 participants coming from 19 countries and four different continents. The comparison was divided into two parts: the key comparison that included 10 NMIs or DIs, and the pilot study including all participants. The global result given by the pilot study confirms that all instruments are absolutely coherent to each other. The results obtained for the key comparison confirm a good agreement between the NMI instrumentsopenO. Francis; H. Baumann; C. Ullrich; S. Castelein; M. Van Camp; M. Andrade de Sousa; R. Lima Melhorato; C. Li; J. Xu; D. Su; S. Wu; H. Hu; K. Wu; G. Li; Z. Li; W. Hsieh; V. Pálinkás; J. Kostelecký; J. Mäkinen; J. Näränen; S. Merlet; F. Pereira Dos Santos; P. Gillot; J. Hinderer; J. D. Bernard; N. Le Moigne; B. Fores; O. Gitlein; M. Schilling; R. Falk; H. Wilmes; Germak A.; E. Biolcati; C. Origlia; D. Iacovone; F. Baccaro; S. Mizushima; R. De Plaen; G. Klein; M. Seil; R. Radinovic; M. Sekowski; P. Dykowski; I. M. Choi; M. S. Kim; A. Borreguero; S. Sainz-Maza; M. Calvo; A. Engfeldt; J. Agren; R. Reudink; M. Eckl; D. van Westrum; R. Billson; B. EllisFrancis, O.; Baumann, H.; Ullrich, C.; Castelein, S.; Van Camp, M.; Andrade de Sousa, M.; Lima Melhorato, R.; Li, C.; Xu, J.; Su, D.; Wu, S.; Hu, H.; Wu, K.; Li, G.; Li, Z.; Hsieh, W.; Pálinkás, V.; Kostelecký, J.; Mäkinen, J.; Näränen, J.; Merlet, S.; Pereira Dos Santos, F.; Gillot, P.; Hinderer, J.; Bernard, J. D.; Le Moigne, N.; Fores, B.; Gitlein, O.; Schilling, M.; Falk, R.; Wilmes, H.; Germak, ALESSANDRO FRANCO LIDIA; Biolcati, E.; Origlia, C.; Iacovone, D.; Baccaro, F.; Mizushima, S.; De Plaen, R.; Klein, G.; Seil, M.; Radinovic, R.; Sekowski, M.; Dykowski, P.; Choi, I. M.; Kim, M. S.; Borreguero, A.; Sainz Maza, S.; Calvo, M.; Engfeldt, A.; Agren, J.; Reudink, R.; Eckl, M.; van Westrum, D.; Billson, R.; Ellis, B

New Primary Standards for Establishing SI Traceability for Moisture Measurements in Solid Materials

partially_open17sìA European research project METefnet addresses a fundamental obstacle to improving energy-intensive drying process control: due to ambiguous reference analysis methods and insufficient methods for estimating uncertainty in moisture measurements, the achievable accuracy in the past was limited and measurement uncertainties were largely unknown. This paper reports the developments in METefnet that provide a sound basis for the SI traceability: four new primary standards for realizing the water mass fraction were set up, analyzed and compared to each other. The operation of these standards is based on combining sample weighing with different water vapor detection techniques: cold trap, chilled mirror, electrolytic and coulometric Karl Fischer titration. The results show that an equivalence of 0.2 % has been achieved between the water mass fraction realizations and that the developed methods are applicable to a wide range of materials.partially_openHeinonen, M.; Bell, S.; Choi, B. Il; Cortellessa, G.; Fernicola, V.; Georgin, E.; Hudoklin, D.; Ionescu, G. V.; Ismail, N.; Keawprasert, T.; Krasheninina, M.; Aro, R.; Nielsen, J.; Oğuz Aytekin, S.; Österberg, P.; Skabar, J.; Strnad, R.Heinonen, M.; Bell, S.; Choi, B. Il; Cortellessa, G.; Fernicola, V.; Georgin, E.; Hudoklin, D.; Ionescu, G. V.; Ismail, N.; Keawprasert, T.; Krasheninina, M.; Aro, R.; Nielsen, J.; Oğuz Aytekin, S.; Österberg, P.; Skabar, J.; Strnad, R

Evaluations of some terminating hypergeometric ₂F₁(2) series with applications

Explicit expressions for the hypergeometric series 2F1(-n, a; 2a±j; 2) and 2F1(-n, a;-2n±j; 2) for positive integer n and arbitrary integer j are obtained with the help of generalizations of Kummer's second and third summation theorems obtained earlier by Rakha and Rathie. Results for |j| ≤ 5 derived previously using different methods are also obtained as special cases. Two applications are considered, where the first summation formula is applied to a terminating 3F2(2) series and the confluent hypergeometric function 1F1(x).</p

The Quantum No-Stretching: A geometrical interpretation of the no-cloning theorem

We consider the ideal situation in which a space rotation is transferred from a quantum spin j to a quantum spin l different from j. Quantum-information theoretical considerations lead to the conclusion that such operation is possible only for lj. For l>j the optimal stretching transformation is derived. We show that for qubits the present no-stretching theorem is equivalent to the usual no-cloning theorem

Photonics Integrations Enabling High-end Applications Of Inp In Optical Data Transmissions

We present here results from a uniquely designed InP modulator chip combined with advanced packaging concepts, which enables high-end applications in optical data communications. An electroabsorption (EA) modulator, with a strained InGaAsP or InGaAlAs multiple quantum well structure, is monolithically integrated with a semiconductor optical amplifier. This design offers broad wavelength tunability while maintaining high extinction ratio, high optical output power, and high dispersion tolerance. The amplified EA modulator chip is co-packaged with a distributed feed back (DFB) laser ensuring separate optimization of the laser and modulator sections. The optical isolator, placed between the laser and modulator, completely eliminates adiabatic chirp. This Telcordia-qualified laser integrated modulator platform enables superior performance previously not thought possible for InP absorption based modulators. 11 dB of dynamic extinction ratio, 5dBm of modulated output power, and ±1200ps/nm or +1600ps/nm dispersion tolerance can be simultaneously achieved in un-amplified 10Gb/s data transmission. Full C-band tunability using a single device is also demonstrated with the LIM module. Extensive simulations and transmission system evaluations shows that with the controllable chirp, the cost-effective LIM performs as well as a Mach-Zehnder modulator in dispersion managed and amplified long-haul WDM systems. Lastly, the first uncooled 10Gb/s long-reach operation at 1550nm was demonstrated with LIM packages. Using a simple control algorithm, a constant modulated output power of IdBm with less than IdB dispersion penalty over 1600ps/nm single mode fiber is achieved in an 80 degrees environmental temperature range without any module temperature control. Utilizing the Al-based material system, also allows a reduced variation of the extinction ratio.6013Kaminow, I.P., Koch, T.L., (1997) Optical Fiber Telecommunications IIIA, , San Diego CA: Academic PressChoi, W., Bond, A.E., Kim, J., Zhang, J., Jambunathan, R., Foulk, H., O'Brien, S., Cao, H., Low insertion loss and low dispersion penalty InGaAsP quantum well high speed electroabsorption modulators (2002) IEEE Journal of Lightwave Technologies, 20, pp. 2052-2056Choi, W., Frateschi, N., Zhang, J., Gebretsadik, H., Jambunathan, R., Bond, A.E., Van Norman, J., Wanamaker, C., Full C-band tunable high fiber output power electroabsorption modulator integrated with semiconductor optical amplifier (2003) Electronics Letters, 39, p. 1271. , 2003Zhang, L., Cao, X.D., Long haul transmission using electro-absorption modulators (2002) Technical Proceeding of NFOEC'2002, p. 1204. , paper P447www.vpiphotonics.comMikhailov, V., Killey, R.I., Prat, J., Bayvel, P., Limitation to WDM transmission distance due to cross-phase modulation induced spectral broadening in dispersion compensated standard fiber systems (1999) IEEE Photon. Technol. Lett., 11, pp. 994-996Zhang, J., Frateschi, N., Choi, W., Gebretsadik, H., Jambunathan, R., Bond, A.E., A laser integrated modulator module for uncooled, 10Gbit/s 1550 nm long reach data transmission (2003) Electronics Letters, 39, pp. 1841-1842Frateschi, N.C., Zhang, J., Choi, W.J., Gebretsadik, H., Jambunathan, R., Bond, A.E., High performance uncooled C-band, 10 Gb/s InGaAlAs MQW electro-absorption modulator integrated to Semiconductor Amplifier in Laser integrated modules (2004) Electronics Letters, 40, pp. 140-141. , JanFrateschi, N.C., Zhang, J., Jambunathan, R., Choi, W.J., Ebert, C., Bond, A.E., Long reach uncooled performance of 10 Gb/s Laser integrated modules with InGaAlAs/InP and InGaAsP/InP MQW electroabsorption modulators monolithically integrated with Semiconductor Amplifiers IEEE Photon. Technol. Lett., 17, pp. 1378-138

Comment on "Can one predict DNA Transcription Start Sites by Studying Bubbles?"

Comment on T.S. van Erp, S. Cuesta-Lopez, J.-G. Hagmann, and M. Peyrard, Phys. Rev. Lett. 95, 218104 (2005) [arXiv: physics/0508094]

Heavy quark spin selection rule and the properties of the X(3872)

The properties of the resonance X(3872) are discussed under the assumption that this resonance is dominantly a `molecular' $J^{PC}=1^{++}$ state of neutral $D$ and $D^*$ mesons. It is argued that in these properties should dominate the states with the total spin of the charmed quark-antiquark pair equal to one. As a practical application of this observation the ratio of the rates of the decays $X \to \pi^0 \chi_{cJ}$ for different $J$ is predicted. It is also pointed out that the total rate of these decays is likely to be comparable to that of the observed transitions $X \to \pi^+ \pi^- J\psi$ and $X \to \pi^+ \pi^- \pi^0 J\psi$. The decays of the X into light hadrons and its production in hadronic processes are also briefly discussed.Comment: 7 page

High Spatial Resolution Observations of Two Young Protostars in the R Corona Australis Region

We present multi-wavelength, high spatial resolution imaging of the IRS 7 region in the R Corona Australis molecular cloud. Our observations include 1.1 mm continuum and HCO^+ J = $3 \to 2$ images from the SMA, ^{12}CO J = $3 \to 2$ outflow maps from the DesertStar heterodyne array receiver on the HHT, 450 $\mu$m and 850 $\mu$m continuum images from SCUBA, and archival Spitzer IRAC and MIPS 24 \micron images. The accurate astrometry of the IRAC images allow us to identify IRS 7 with the cm source VLA 10W (IRS 7A) and the X-ray source X_W. The SMA 1.1 mm image reveals two compact continuum sources which are also distinguishable at 450 $\mu$m. SMA 1 coincides with X-ray source CXOU J190156.4-365728 and VLA cm source 10E (IRS 7B) and is seen in the IRAC and MIPS images. SMA 2 has no infrared counterpart but coincides with cm source VLA 9. Spectral energy distributions constructed from SMA, SCUBA and Spitzer data yield bolometric temperatures of 83 K for SMA 1 and $\leq$70 K for SMA 2. These temperatures along with the submillimeter to total luminosity ratios indicate that SMA 2 is a Class 0 protostar, while SMA 1 is a Class 0/Class I transitional object (L=$17\pm6$ \Lsun). The ^{12}CO J = $3 \to 2$ outflow map shows one major and possibly several smaller outflows centered on the IRS 7 region, with masses and energetics consistent with previous work. We identify the Class 0 source SMA 2/VLA 9 as the main driver of this outflow. The complex and clumpy spatial and velocity distribution of the HCO^+ J = $3 \to 2$ emission is not consistent with either bulk rotation, or any known molecular outflow activity.Comment: 31 pages, 8 figures, Accepted to Ap