TY - JOUR
AB - Although the X chromosome is usually similar to the autosomes in size and cytogenetic appearance, theoretical models predict that its hemizygosity in males may cause unusual patterns of evolution. The sequencing of several genomes has indeed revealed differences between the X chromosome and the autosomes in the rates of gene divergence, patterns of gene expression and rates of gene movement between chromosomes. A better understanding of these patterns should provide valuable information on the evolution of genes located on the X chromosome. It could also suggest solutions to more general problems in molecular evolution, such as detecting selection and estimating mutational effects on fitness
AU - Beatriz Vicoso
AU - Charlesworth, Brian
ID - 2066
IS - 8
JF - Nature Reviews Genetics
TI - Evolution on the X chromosome: Unusual patterns and processes
VL - 7
ER -
TY - CONF
AB - We present an adaptive animation method for electrical discharges. Electrical discharges can be simulated using the dielectric breakdown model. Regular discretization of the governing Laplace equation leads to huge equation systems, and the computational cost of solving the equations quickly becomes prohibitive at high resolutions, especially for simulations in 3D. In contrast, our method discretizes the Laplace equation on an adaptive octree, reducing the size of the problem significantly, and making simulations of high resolution 3D datasets and even 3D animations feasible. In order to enhance realism for lightning animations, we propose a particle simulation that animates the residual positive charge. Thus, interaction of electrical discharges with their surroundings
can be simulated.
AU - Bernd Bickel
AU - Wicke, Martin
AU - Gross, Markus
ID - 2077
TI - Adaptive simulation of electrical discharges
ER -
TY - CONF
AB - We have measured 3D face geometry, skin reflectance, and subsurface scattering using custom-built devices for 149 subjects of varying age, gender, and race. We developed a novel skin reflectance model whose parameters can be estimated from measurements. The model decomposes the large amount of measured skin data into a spatially-varying analytic BRDF, a diffuse albedo map, and diffuse subsurface scattering. Our model is intuitive, physically plausible, and - since we do not use the original measured data - easy to edit as well. High-quality renderings come close to reproducing real photographs. The analysis of the model parameters for our sample population reveals variations according to subject age, gender, skin type, and external factors (e.g., sweat, cold, or makeup). Using our statistics, a user can edit the overall appearance of a face (e.g., changing skin type and age) or change small-scale features using texture synthesis (e.g., adding moles and freckles). We are making the collected statistics publicly available to the research community for applications in face synthesis and analysis.
AU - Weyrich, Tim
AU - Matusik, Wojciech
AU - Pfister, Hanspeter
AU - Bernd Bickel
AU - Donner, Craig
AU - Tu, Chien
AU - McAndless, Janet M
AU - Lee, Jinho
AU - Ngan, Addy
AU - Jensen, Henrik W
AU - Groß, Markus S
ID - 2088
TI - Analysis of human faces using a measurement-based skin reflectance model
ER -
TY - JOUR
AB - We have measured 3D face geometry, skin reflectance, and subsurface scattering using custom-built devices for 149 subjects of varying age, gender, and race. We developed a novel skin reflectance model whose parameters can be estimated from measurements. The model decomposes the large amount of measured skin data into a spatially-varying analytic BRDF, a diffuse albedo map, and diffuse subsurface scattering. Our model is intuitive, physically plausible, and - since we do not use the original measured data - easy to edit as well. High-quality renderings come close to reproducing real photographs. The analysis of the model parameters for our sample population reveals variations according to subject age, gender, skin type, and external factors (e.g., sweat, cold, or makeup). Using our statistics, a user can edit the overall appearance of a face (e.g., changing skin type and age) or change small-scale features using texture synthesis (e.g., adding moles and freckles). We are making the collected statistics publicly available to the research community for applications in face synthesis and analysis.
AU - Weyrich, Tim
AU - Matusik, Wojciech
AU - Pfister, Hanspeter
AU - Bernd Bickel
AU - Donner, Craig
AU - Tu, Chien
AU - McAndless, Janet M
AU - Lee, Jinho
AU - Ngan, Addy
AU - Jensen, Henrik W
AU - Groß, Markus S
ID - 2089
IS - 3
JF - ACM Transactions on Graphics
TI - Analysis of human faces using a measurement-based skin reflectance model
VL - 25
ER -
TY - CONF
AU - Bernd Bickel
AU - Weyrich, Tim
AU - Matusik, Wojciech
AU - Pfister, Hanspeter
AU - Donner, Craig
AU - Tu, Chien
AU - McAndless, Janet M
AU - Lee, Jinho
AU - Ngan, Addy
AU - Jensen, Henrik W
AU - Groß, Markus S
ID - 2090
TI - Processing and editing of faces using a measurement-based skin reflectance model
ER -
TY - JOUR
AB - For any integers d,n ≥2, let X ⊂ Pn be a non‐singular hypersurface of degree d that is defined over the rational numbers. The main result in this paper is a proof that the number of rational points on X which have height at most B is O(Bn − 1 + ɛ), for any ɛ > 0. The implied constant in this estimate depends at most upon d, ɛ and n. 2000 Mathematics Subject Classification 11D45 (primary), 11G35, 14G05 (secondary).
AU - Timothy Browning
AU - Heath-Brown, Roger
AU - Starr, Jason M
ID - 213
IS - 2
JF - Proceedings of the London Mathematical Society
TI - The density of rational points on non-singular hypersurfaces, II
VL - 93
ER -
TY - JOUR
AB - Predissociation of the N+2 C 2Σ+u(v') vibrational levels with v' ≥ 3 was observed via dispersed C 2Σ+u → X 2Σ+g fluorescence in the spectral range of 165–208 nm after resonant 1s−1π*(vr) excitation of N2 and its subsequent autoionization into the N+2 C state. This range is dominated by lines in atomic nitrogen, by overlapped C 2Σ+u(v') → X 2Σ+g(v'') vibrational band sequences with Δv = const and broad unresolved band systems (D, (2))2Πg(v') → A2Πu(v'') in the N+2 molecular ion. With very high fluorescence resolution of about 0.1 nm FWHM individual C 2Σ+u(v') → X 2Σ+g(v'') vibrational bands have been resolved. Calculation of the observed fluorescence spectra by taking into account predissociation and molecular rotation describes well the shape of both individual vibrational bands C 2Σ+u(v') → X 2Σ+g(v'') and the whole band system.
AU - Ehresmann, Arno
AU - Werner, Lutz
AU - Klumpp, Stefan
AU - Demekhin, Ph V
AU - Mikhail Lemeshko
AU - Sukhorukov, V. L
AU - Schartner, Karl H
AU - Schmoranzer, Hans P
ID - 2134
IS - 6
JF - Journal of Physics B: Atomic, Molecular and Optical Physics
TI - Predissociation of the N+2(C 2Σ+u) state observed via C 2Σ+u → X 2Σ+g fluorescence after resonant 1s−1π* excitation of N2 molecule
VL - 39
ER -
TY - JOUR
AB - Fluorescence from fragments formed after the de-excitation of the N*2(1s−1π*) resonance has been measured in the spectral range of 135–190 nm. This range is dominated by lines in atomic nitrogen and lines formed by overlapping C2Σ+u(v') → X2Σ+g(v'') bands with Δv = const in the N+2 molecular ion which result from the spectator Auger decays of the N*2(1s−1π*(vr)) resonances. Ab initio calculations of the corresponding potential curves and transition probabilities showed that the observed irregular intensity dependence of the C2Σ+u(v') → X2Σ+g(v'')(Δv = const) fluorescence lines on the vibrational quantum number vr is due to transitions between vibrational levels during the reaction N2(v0 = 0)→ N*2(1s−1π*(vr)) Longrightarrow C2Σ+u(v') → X2Σ+g(v'').
AU - Ehresmann, Arno
AU - Werner, Lutz
AU - Klumpp, Stefan
AU - Lucht, S
AU - Schmoranzer, Hans P
AU - Mickat, Sascha
AU - Schill, Rüdiger H
AU - Schartner, Karl H
AU - Demekhin, Philipp
AU - Mikhail Lemeshko
AU - Sukhorukov, Victor L
ID - 2142
IS - 2
JF - Journal of Physics B: Atomic, Molecular and Optical Physics
TI - Studying the N+2(C2Σ+u → X2Σ+g) fluorescence excited via the 1s−1π* resonance
VL - 39
ER -
TY - JOUR
AB - Temperature dependent preedge and extended x-ray absorption fine structure measurements at the Zr K edge for the perovskite-type zirconates Pb Zr0.515 Ti0.485 O3 (PZT), PbZr O3 (PZ), and BaZr O3 are performed. To carry out a more accurate study of the weak reconstruction of the local atomic structure we employed a combination of two techniques: (i) analysis of the preedge fine structure, and (ii) analysis of the Fourier transform of the difference between χ (k) functions obtained at different temperatures. A detailed investigation of local atomic structure in the cubic phase for all the crystals is also performed. It is shown that neither the displacive nor the order-disorder model can describe correctly the changes of local atomic structure during phase transitions in PZ and PZT. A spherical model describing the local atomic structure of perovskite-type crystals suffering structural phase transitions is proposed.
AU - Vedrinskiǐ, Rostislav V
AU - Nazarenko, Elena S
AU - Mikhail Lemeshko
AU - Nassif, Vivian M
AU - Proux, Olivier
AU - Novakovich, Alexander A
AU - Joly, Yves
ID - 2144
IS - 13
JF - Physical Review B - Condensed Matter and Materials Physics
TI - Temperature dependent XAFS studies of local atomic structure of the perovskite-type zirconates
VL - 73
ER -
TY - JOUR
AB - For any n≥3, let F ∈ Z[X0,...,Xn ] be a form of degree d *≥5 that defines a non-singular hypersurface X ⊂ Pn . The main result in this paper is a proof of the fact that the number N (F ; B) of Q-rational points on X which have height at most B satisfiesN (F ; B) = Od,ε,n (Bn −1+ε ), for any ε > 0. The implied constant in this estimate depends at most upon d, ε and n. New estimates are also obtained for the number of representations of a positive integer as the sum of three dth powers, and for the paucity of integer solutions to equal sums of like polynomials.*
AU - Timothy Browning
AU - Heath-Brown, Roger
ID - 215
IS - 3
JF - Bulletin of the London Mathematical Society
TI - The density of rational points on non-singular hypersurfaces, I
VL - 38
ER -