214 research outputs found
Quartz OSL dating of sand dunes of Late Pleistocene in the Mu Us Desert in northern China
No full textAutomated static and dynamic obstacle avoidance in arbitrary 3D polygonal worlds
No full textMediamaticsElectrical Engineering, Mathematics and Computer Scienc
Finding SHA-1 Characteristics: General Results and Applications
No full textsponsorship: We would like to thank Florian Mendel and Vincent Rijmen for many insightful discussions. The work described in this paper has been supported by the European Commission through the IST Programme under Contract IST-2002-507932 ECRYPT. The first author is supported by the Austrian Science Fund (FWF) project P18138. (European Commission through the IST Programme ECRYPT|IST-2002-507932, Austrian Science Fund (FWF)|P18138, Austrian Science Fund (FWF)|P18138)status: Publishe
Multi-Physics Driven Electromigration Study: Multi-Scale Modeling and Experiment
No full textThis dissertation presents a comprehensive and integrated study, including theory development, numerical simulation and experiment, for multi-physics driven electromigration in microelectronics. Multi-scale methodologies from atomistic modeling to continuum theory-based simulation have been developed. Moreover, extensive experimental testing, from testing wafer/die design and fabrication, sample preparation and process, to the measurement setup and characterization, has been conducted. The dissertation also provides synergetic and cohesive analysis between simulation and experiment. The simulation predictions and results have been well validated by experimental data.Electronic Components, Technology and Material
Publisher Correction: A Co3O4-CDots-C3N4 three component electrocatalyst design concept for efficient and tunable CO2 reduction to syngas
No full textThe original HTML version of this Article omitted to list Yeshayahu Lifshitz as a corresponding author and incorrectly listed Shuit-Tong Lee as a corresponding author.Correspondingly, the original PDF version of this Article incorrectly stated that “Correspondence and requests for materials should be addressed to X.J. (email: [email protected]), or to Y.L. (email: [email protected]), or to S.-T.L. (email: [email protected]), or to Z.K. (email: [email protected])”, instead of the correct “Correspondence and requests for materials should be addressed to X.J. (email: [email protected]), or to Y. Liu (email: [email protected]), or to Y. Lifshitz (email: [email protected]), or to Z.K. (email: [email protected])”.This has now been corrected in the PDF and HTML versions of the Article.</jats:p
Studies of the decay
No full textThe decay is studied based on 7.33 fb of ee collision data collected with the BESIII detector at center-of-mass energies in the range from 4.128 to 4.226 GeV. The absolute branching fraction is measured as , the most precise measurement to date. Combining with the world average of , the ratio of the branching fractions obtained is , in agreement with lepton universality. By performing a partial wave analysis, the hadronic form factor ratios at q = 0 are extracted, finding and , where the first uncertainties are statistical and the second are systematic. No significant S-wave contribution from f(980) → KK is found. The upper limit \mathcal{B}\left({D}_s^{+}\to {f}_0(980){\mu}^{+}{\nu}_{\mu}\right)\cdot \mathcal{B}\left({f}_0(980)\to {K}^{+}{K}^{-}\right)<5.45\times {10}^{-4} is set at 90% credibility level.[graphic not available: see fulltext
HIGH RESOLUTION ASSIGNMENT OF AND BANDS IN THE 10 M FOR TRANS-ACROLEIN
No full textAuthor Institution: Centre for Laser, Atomic and Molecular Sciences (CLAMS), Dept. of Physical Sciences, Univ. of New Brunswick, Canada E2L 4L5; Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Canada\hspace{1cm} Acrolein (CHCHCHO) is one of the four (in addition to methanol CHOH, acetaldehyde CHCHO, and 1,3-butadiene CHCHCHCH) 2004 target molecules from main- and side-stream (MS and SS) cigarette smoke. The present work is aimed at extending the database of high resolution laboratory spectroscopic information on the molecule in the 10 m region. \hspace{1cm} We have obtained 10 m high resolution spectra from NRC both at room and cooled temperatures at 0.002 cm resolution. The spectra cover several vibrational bands including the two dominant ones, the CH out-of-plane rocking and CH2 twisting. Analyses of the and bands are now at advanced stages. More specifically, about 1085 lines have been assigned to the band for transitions to upper state Ka' = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, and about 800 lines have been assigned to the band for transitions to upper state Ka' = 1, 2, 3, 4, 5, 6, 7 and 8. We have applied an isolated band model to each band using Maki's asymmetric rotor Hamiltonian in which some assigned transitions were removed from our fits. In our analysis, we have encountered challenges due to high line density as well as perturbations. For the latter, J-reduced upper state term values have been obtained and plotted as a function of J, indicating possible interactions among the two states. \hspace{1cm} For intensity information, we have carried out dipole derivative calculations using the procedure explained in Ref. [2] for 1,3-butadiene. A line list with position and intensity has been compiled using the dipole derivatives and the rotational constants obtained from the present work. \hrule \hspace{1cm} \item{[1]} Private communication from Aerodyne Research, Inc., and Phillip Morris Research Center. \item{[2]} Z.D. Sun, Li-Hong Xu, R.M. Lees, X.J. Jiang, S. Perry, N.C. Craig, J. Mol. Struct. 742 (2005) 69-76
An implicit algorithm for capturing sharp fluid interfaces in the volume of fluid advection method
No full textThe Volume of Fluid (VOF) method is one of the most effective methods employed in the simulation of two fluid flows with interfaces where density and viscosity change abruptly. These interfaces are represented implicitly by the values of a colour function which is a volume fraction of one of the fluids. The advantage of the method is its ability to deal with arbitrarily shaped interfaces and to cope with large deformations, as well as interface rupture and coalescence in a natural way. In comparison to a level set method, the mass is rigorously conserved in VOF, provided the discretisation is conservative, but one of the main difficulties is advecting the interface without diffusing, dispersing, or wrinkling it. This can either be performed algebraically, in schemes such as CICSAM or geometrically, in schemes such as PLIC. In the present paper, an algebraic advection scheme for the interface is presented, which is designed for the implicit time advancing algorithm. Analogous to CICSAM, the new scheme switches smoothly between ULTIMATE-QUICK and the upper bound of the universal limiter, depending on the angle between the interface and the flow direction. Four cases are tested with the present scheme: (i) solid body rotation; (ii) circle in a shear flow; (iii) dam-break and (iv) Rayleigh-Taylor instability. In the first two test cases, prescribed velocity fields are used, thereby allowing the effectiveness of the scheme in advecting the colour function only to be assessed. The scheme is found to outperform six other methods used for comparison in both studies. In solid body rotation simulations a fractional error of 0.19% is calculated in comparison to the next best recorded error of 1.1%. Similarly, in the longest shear flow simulation, a fractional error of 1.2% is calculated in comparison to the next best recorded error of 3.9%. In the final two test cases the advection equation for the colour function is coupled to the Navier-Stokes equations. In dam-break simulations it is found that the resulting solution effectively captures the trends displayed in experimental data for the advancing water front and the residual height of the liquid column against time. Qualitative results obtained for the Rayleigh-Taylor instability modelling in test case four are found to compare favourably to previous numerical simulations of the same phenomenon
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