@article{13425, abstract = {Nanoparticles (NPs) decorated with ligands combining photoswitchable dipoles and covalent cross-linkers can be assembled by light into organized, three-dimensional suprastructures of various types and sizes. NPs covered with only few photoactive ligands form metastable crystals that can be assembled and disassembled “on demand” by using light of different wavelengths. For higher surface concentrations, self-assembly is irreversible, and the NPs organize into permanently cross-linked structures including robust supracrystals and plastic spherical aggregates.}, author = {Klajn, Rafal and Bishop, Kyle J. M. and Grzybowski, Bartosz A.}, issn = {1091-6490}, journal = {Proceedings of the National Academy of Sciences}, keywords = {Multidisciplinary}, number = {25}, pages = {10305--10309}, publisher = {Proceedings of the National Academy of Sciences}, title = {{Light-controlled self-assembly of reversible and irreversible nanoparticle suprastructures}}, doi = {10.1073/pnas.0611371104}, volume = {104}, year = {2007}, } @article{13426, abstract = {Photoswelling of thin films of dichromated gelatin provides a basis for fabrication of multilevel surface reliefs via sequential UV illumination through different photomasks. The remarkable feature of this simple, benchtop technique is that by adjusting irradiation times, film thickness, or its hydration state the heights of the developed features can be varied from few nanometers to tens of microns. After UV exposure, the surface structures can be replicated faithfully into either soft or hard PDMS stamps.}, author = {Paszewski, Maciej and Smoukov, Stoyan K. and Klajn, Rafal and Grzybowski, Bartosz A.}, issn = {1520-5827}, journal = {Langmuir}, keywords = {Electrochemistry, Spectroscopy, Surfaces and Interfaces, Condensed Matter Physics, General Materials Science}, number = {10}, pages = {5419--5422}, publisher = {American Chemical Society}, title = {{Multilevel surface nano- and microstructuring via sequential photoswelling of dichromated gelatin}}, doi = {10.1021/la062982c}, volume = {23}, year = {2007}, } @article{13427, abstract = {Deformable, spherical aggregates of metal nanoparticles connected by long-chain dithiol ligands self-assemble into nanostructured materials of macroscopic dimensions. These materials are plastic and moldable against arbitrarily shaped masters and can be thermally hardened into polycrystalline metal structures of controllable porosity. In addition, in both plastic and hardened states, the assemblies are electrically conductive and exhibit Ohmic characteristics down to ∼20 volts per meter. The self-assembly method leading to such materials is applicable both to pure metals and to bimetallic structures of various elemental compositions.}, author = {Klajn, Rafal and Bishop, Kyle J. M. and Fialkowski, Marcin and Paszewski, Maciej and Campbell, Christopher J. and Gray, Timothy P. and Grzybowski, Bartosz A.}, issn = {1095-9203}, journal = {Science}, keywords = {Multidisciplinary}, number = {5822}, pages = {261--264}, publisher = {American Association for the Advancement of Science}, title = {{Plastic and moldable metals by self-assembly of sticky nanoparticle aggregates}}, doi = {10.1126/science.1139131}, volume = {316}, year = {2007}, } @inproceedings{582, abstract = {Using the techniques of "quantum weak-measurements" as a coherent amplification mechanism for small signals, for the first time we have measured the recently proposed "spin Hall effect" of light.}, author = {Onur Hosten and Kwiat, Paul G}, publisher = {OSA}, title = {{Observing the spin hall effect of light via quantum weak measurements}}, doi = {10.1364/FIO.2007.JTuA4}, year = {2007}, } @article{6150, author = {Gumienny, Tina L. and MacNeil, Lesley T. and Wang, Huang and de Bono, Mario and Wrana, Jeffrey L. and Padgett, Richard W.}, issn = {0960-9822}, journal = {Current Biology}, number = {2}, pages = {159--164}, publisher = {Elsevier}, title = {{Glypican LON-2 is a conserved negative regulator of BMP-like signaling in Caenorhabditis elegans}}, doi = {10.1016/j.cub.2006.11.065}, volume = {17}, year = {2007}, } @unpublished{6321, abstract = {These lecture notes describe the current state of affairs for Manin's conjecture in the context of del Pezzo surfaces.}, author = {Browning, Timothy D}, booktitle = {arXiv}, title = {{The Manin conjecture in dimension 2}}, year = {2007}, } @inbook{6323, abstract = {This paper surveys recent progress towards the Manin conjecture for (singular and non-singular) del Pezzo surfaces. To illustrate some of the techniques available, an upper bound of the expected order of magnitude is established for a singular del Pezzo surface of degree four.}, author = {Browning, Timothy D}, booktitle = {A Tribute to Gauss and Dirichlet}, pages = {39--56}, publisher = {American Mathematical Society}, title = {{An overview of Manin's conjecture for del Pezzo surfaces}}, volume = {7}, year = {2007}, } @article{1035, abstract = {We explore the rich internal structure of Cs2 Feshbach molecules. Pure ultracold molecular samples are prepared in a CO2 -laser trap, and a multitude of weakly bound states is populated by elaborate magnetic-field ramping techniques. Our methods use different Feshbach resonances as input ports and various internal level crossings for controlled state transfer. We populate higher partial-wave states of up to eight units of rotational angular momentum (l -wave states). We investigate the molecular structure by measurements of the magnetic moments for various states. Avoided level crossings between different molecular states are characterized through the changes in magnetic moment and by a Landau-Zener tunneling method. Based on microwave spectroscopy, we present a precise measurement of the magnetic-field-dependent binding energy of the weakly bound s -wave state that is responsible for the large background scattering length of Cs. This state is of particular interest because of its quantum-halo character.}, author = {Mark, Michael and Ferlaino, Francesca and Knoop, Steven and Danzl, Johann G and Kraemer, Tobias and Chin, Cheng and Nägerl, Hanns and Grimm, Rudolf}, journal = {Physical Review A - Atomic, Molecular, and Optical Physics}, number = {4}, publisher = {American Physical Society}, title = {{Spectroscopy of ultracold trapped cesium Feshbach molecules}}, doi = {10.1103/PhysRevA.76.042514}, volume = {76}, year = {2007}, } @article{9487, abstract = {Cytosine DNA methylation is considered to be a stable epigenetic mark, but active demethylation has been observed in both plants and animals. In Arabidopsis thaliana, DNA glycosylases of the DEMETER (DME) family remove methylcytosines from DNA. Demethylation by DME is necessary for genomic imprinting, and demethylation by a related protein, REPRESSOR OF SILENCING1, prevents gene silencing in a transgenic background. However, the extent and function of demethylation by DEMETER-LIKE (DML) proteins in WT plants is not known. Using genome-tiling microarrays, we mapped DNA methylation in mutant and WT plants and identified 179 loci actively demethylated by DML enzymes. Mutations in DML genes lead to locus-specific DNA hypermethylation. Reintroducing WT DML genes restores most loci to the normal pattern of methylation, although at some loci, hypermethylated epialleles persist. Of loci demethylated by DML enzymes, >80% are near or overlap genes. Genic demethylation by DML enzymes primarily occurs at the 5′ and 3′ ends, a pattern opposite to the overall distribution of WT DNA methylation. Our results show that demethylation by DML DNA glycosylases edits the patterns of DNA methylation within the Arabidopsis genome to protect genes from potentially deleterious methylation.}, author = {Penterman, Jon and Zilberman, Daniel and Huh, Jin Hoe and Ballinger, Tracy and Henikoff, Steven and Fischer, Robert L.}, issn = {1091-6490}, journal = {Proceedings of the National Academy of Sciences}, number = {16}, pages = {6752--6757}, publisher = {National Academy of Sciences}, title = {{DNA demethylation in the Arabidopsis genome}}, doi = {10.1073/pnas.0701861104}, volume = {104}, year = {2007}, } @misc{9504, author = {Zilberman, Daniel}, booktitle = {Nature Genetics}, issn = {1546-1718}, number = {4}, pages = {442--443}, publisher = {Nature Publishing Group}, title = {{The human promoter methylome}}, doi = {10.1038/ng0407-442}, volume = {39}, year = {2007}, } @article{9524, abstract = {Cytosine methylation is the most common covalent modification of DNA in eukaryotes. DNA methylation has an important role in many aspects of biology, including development and disease. Methylation can be detected using bisulfite conversion, methylation-sensitive restriction enzymes, methyl-binding proteins and anti-methylcytosine antibodies. Combining these techniques with DNA microarrays and high-throughput sequencing has made the mapping of DNA methylation feasible on a genome-wide scale. Here we discuss recent developments and future directions for identifying and mapping methylation, in an effort to help colleagues to identify the approaches that best serve their research interests.}, author = {Zilberman, Daniel and Henikoff, Steven}, issn = {1477-9129}, journal = {Development}, number = {22}, pages = {3959--3965}, publisher = {The Company of Biologists}, title = {{Genome-wide analysis of DNA methylation patterns}}, doi = {10.1242/dev.001131}, volume = {134}, year = {2007}, } @article{11115, abstract = {The formation of the nuclear envelope (NE) around chromatin is a major membrane-remodelling event that occurs during cell division of metazoa. It is unclear whether the nuclear membrane reforms by the fusion of NE fragments or if it re-emerges from an intact tubular network of the endoplasmic reticulum (ER). Here, we show that NE formation and expansion requires a tubular ER network and occurs efficiently in the presence of the membrane fusion inhibitor GTPγS. Chromatin recruitment of membranes, which is initiated by tubule-end binding, followed by the formation, expansion and sealing of flat membrane sheets, is mediated by DNA-binding proteins residing in the ER. Thus, chromatin plays an active role in reshaping of the ER during NE formation.}, author = {Anderson, Daniel J. and HETZER, Martin W}, issn = {1476-4679}, journal = {Nature Cell Biology}, keywords = {Cell Biology}, number = {10}, pages = {1160--1166}, publisher = {Springer Nature}, title = {{Nuclear envelope formation by chromatin-mediated reorganization of the endoplasmic reticulum}}, doi = {10.1038/ncb1636}, volume = {9}, year = {2007}, } @article{11116, abstract = {The metazoan nuclear envelope (NE) breaks down and re-forms during each cell cycle. Nuclear pore complexes (NPCs), which allow nucleocytoplasmic transport during interphase, assemble into the re-forming NE at the end of mitosis. Using in vitro NE assembly, we show that the vertebrate homologue of MEL-28 (maternal effect lethal), a recently discovered NE component in Caenorhabditis elegans, functions in postmitotic NPC assembly. MEL-28 interacts with the Nup107–160 complex (Nup for nucleoporin), an important building block of the NPC, and is essential for the recruitment of the Nup107–160 complex to chromatin. We suggest that MEL-28 acts as a seeding point for NPC assembly.}, author = {Franz, Cerstin and Walczak, Rudolf and Yavuz, Sevil and Santarella, Rachel and Gentzel, Marc and Askjaer, Peter and Galy, Vincent and HETZER, Martin W and Mattaj, Iain W and Antonin, Wolfram}, issn = {1469-3178}, journal = {EMBO reports}, keywords = {Genetics, Molecular Biology, Biochemistry}, number = {2}, pages = {165--172}, publisher = {EMBO}, title = {{MEL‐28/ELYS is required for the recruitment of nucleoporins to chromatin and postmitotic nuclear pore complex assembly}}, doi = {10.1038/sj.embor.7400889}, volume = {8}, year = {2007}, } @article{11884, abstract = {About 20% of the world's population uses the Web, and a large majority thereof uses Web search engines to find information. As a result, many Web researchers are devoting much effort to improving the speed and capability of search technology.}, author = {Henzinger, Monika H}, issn = {1095-9203}, journal = {Science}, number = {5837}, pages = {468--471}, publisher = {American Association for the Advancement of Science}, title = {{Search technologies for the internet}}, doi = {10.1126/science.1126557}, volume = {317}, year = {2007}, } @inproceedings{11924, abstract = {How much can smart combinatorial algorithms improve web search engines? To address this question we will describe three algorithms that have had a positive impact on web search engines: The PageRank algorithm, algorithms for finding near-duplicate web pages, and algorithms for index server loadbalancing.}, author = {Henzinger, Monika H}, booktitle = {18th Annual ACM-SIAM Symposium on Discrete Algorithms}, isbn = {9780898716245}, location = {New Orleans, LA, United States}, pages = {1022--1026}, publisher = {Society for Industrial & Applied Mathematics}, title = {{Combinatorial algorithms for web search engines: three success stories}}, year = {2007}, } @inproceedings{2091, abstract = {We present a novel multi-scale representation and acquisition method for the animation of high-resolution facial geometry and wrinkles. We first acquire a static scan of the face including reflectance data at the highest possible quality. We then augment a traditional marker-based facial motion-capture system by two synchronized video cameras to track expression wrinkles. The resulting model consists of high-resolution geometry, motion-capture data, and expression wrinkles in 2D parametric form. This combination represents the facial shape and its salient features at multiple scales. During motion synthesis the motion-capture data deforms the high-resolution geometry using a linear shell-based mesh-deformation method. The wrinkle geometry is added to the facial base mesh using nonlinear energy optimization. We present the results of our approach for performance replay as well as for wrinkle editing. }, author = {Bernd Bickel and Botsch, Mario and Angst, Roland and Matusik, Wojciech and Otaduy, Miguel A and Pfister, Hanspeter and Groß, Markus S}, publisher = {ACM}, title = {{Multi scale capture of facial geometry and motion}}, doi = {doi:10.1145/1275808.1276419}, year = {2007}, } @article{2092, abstract = {We introduce a new appearance-modeling paradigm for synthesizing the internal structure of a 3D model from photographs of a few cross-sections of a real object. When the internal surfaces of the 3D model are revealed as it is cut, carved, or simply clipped, we synthesize their texture from the input photographs. Our texture synthesis algorithm is best classified as a morphing technique, which efficiently outputs the texture attributes of each surface point on demand. For determining source points and their weights in the morphing algorithm, we propose an interpolation domain based on BSP trees that naturally resembles planar splitting of real objects. In the context of the interpolation domain, we define efficient warping and morphing operations that allow for real-time synthesis of textures. Overall, our modeling paradigm, together with its realization through our texture morphing algorithm, allow users to author 3D models that reveal highly realistic internal surfaces in a variety of artistic flavors.}, author = {Pietroni, Nico and Otaduy, Miguel A and Bernd Bickel and Ganovelli, Fabio and Groß, Markus S}, journal = {Computer Graphics Forum}, number = {3}, pages = {637 -- 644}, publisher = {Wiley-Blackwell}, title = {{Texturing internal surfaces from a few cross-sections}}, doi = {10.1111/j.1467-8659.2007.01087.x}, volume = {26}, year = {2007}, } @article{2093, abstract = {We present a novel multi-scale representation and acquisition method for the animation of high-resolution facial geometry and wrinkles. We first acquire a static scan of the face including reflectance data at the highest possible quality. We then augment a traditional marker-based facial motion-capture system by two synchronized video cameras to track expression wrinkles. The resulting model consists of high-resolution geometry, motion-capture data, and expression wrinkles in 2D parametric form. This combination represents the facial shape and its salient features at multiple scales. During motion synthesis the motion-capture data deforms the high-resolution geometry using a linear shell-based mesh-deformation method. The wrinkle geometry is added to the facial base mesh using nonlinear energy optimization. We present the results of our approach for performance replay as well as for wrinkle editing. }, author = {Bernd Bickel and Botsch, Mario and Angst, Roland and Matusik, Wojciech and Otaduy, Miguel A and Pfister, Hanspeter and Groß, Markus S}, journal = {ACM Transactions on Graphics}, number = {3}, publisher = {ACM}, title = {{Multi scale capture of facial geometry and motion}}, doi = {10.1145/1276377.1276419}, volume = {26}, year = {2007}, } @article{2118, abstract = {We extend to infinite dimensions an explicit formula of Chill, Fašangová, Metafune, and Pallara for the optimal angle of analyticity of analytic Ornstein-Uhlenbeck semigroups. The main ingredient is an abstract representation of the Ornstein-Uhlenbeck operator in divergence form. }, author = {Jan Maas and van Neerven, Jan M}, journal = {Archiv der Mathematik}, number = {3}, pages = {226 -- 236}, publisher = {Birkhäuser}, title = {{On analytic Ornstein-Uhlenbeck semigroups in infinite dimensions}}, doi = {10.1007/s00013-007-2082-x}, volume = {89}, year = {2007}, } @article{2135, abstract = {We use the x-ray absorption fine structure spectroscopy at Nb K edge to reveal the local atomic structure of KxNa1−xNbO3 (PSN) solid solutions. The study is performed over the temperature range 10–1023K for six different x values. We show that only the combined analysis of extended x-ray absorption fine structure and preedge fine structure provides complete and reliable information about the local structure of NbO6 octahedra. Such extensive treatment of the experimental data shows that the local structure of PSN could be described within the spherical model proposed earlier as a hypothesis for perovskite-type ferroelectric zirconates. We reveal that the Nb atoms are localized near their average positions on the sphere surfaces for all temperatures and x values. With regard to previous results we point out the features of microscopic structure common for PSN and perovskite-type zirconates.}, author = {Mikhail Lemeshko and Nazarenko, Elena S and Gonchar, A.A and Reznichenko, Larisa A and Nedoseykina, Tatiana I and Novakovich, Alexander A and Mathon, Olivier and Joly, Yves and Vedrinskiǐ, Rostislav V}, journal = {Physical Review B - Condensed Matter and Materials Physics}, publisher = {American Physical Society}, title = {{EXAFS studies of the local atomic structure of the lead-free piezoelectric ceramics KxNa1−xNbO3 over the temperature range 10–1023K}}, doi = {http://dx.doi.org/10.1103/PhysRevB.76.134106}, volume = {76}, year = {2007}, }