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Université de Fribourg

Supply and demand law under variable information

Yuan, Guanghui ; Han, Jingti ; Zhou, Lei ; Liang, Hejun ; Zhang, Yi-Cheng

In: Physica A: Statistical Mechanics and its Applications, 2019, vol. 536, p. 121004

When the product quality is limited and the information capability is variable, we propose the enterprise enhances corporate profits by changing the relationship between market demand and external resources. We assume that the information capacity can be changed through the input of external resources. In this paper, we present a research agenda that empowers external resources to transform...

Université de Fribourg

Magnetic-field uniformity in neutron electric-dipole-moment experiments

Abel, C. ; Ayres, N. J. ; Baker, T. ; Ban, G. ; Bison, G. ; Bodek, K. ; Bondar, V. ; Crawford, C. B. ; Chiu, P.-J. ; Chanel, E. ; Chowdhuri, Z. ; Daum, M. ; Dechenaux, B. ; Emmenegger, S. ; Ferraris-Bouchez, L. ; Flaux, P. ; Geltenbort, P. ; Green, K. ; Griffith, W. C. ; Grinten, M. van der ; Harris, P. G. ; Henneck, R. ; Hild, N. ; Iaydjiev, P. ; Ivanov, S. N. ; Kasprzak, M. ; Kermaidic, Y. ; Kirch, K. ; Koch, H.-C. ; Komposch, S. ; Koss, P. A. ; Kozela, A. ; Krempel, J. ; Lauss, B. ; Lefort, T. ; Lemiere, Y. ; Leredde, A. ; Mohanmurthy, P. ; Pais, D. ; Piegsa, F. M. ; Pignol, G. ; Quéméner, G. ; Rawlik, M. ; Rebreyend, D. ; Ries, D. ; Roccia, S. ; Rozpedzik, D. ; Schmidt-Wellenburg, P. ; Schnabel, A. ; Severijns, N. ; Virot, R. ; Weis, Antoine ; Wursten, E. ; Wyszynski, G. ; Zejma, J. ; Zsigmond, G.

In: Physical Review A, 2019, vol. 99, no. 4, p. 042112

Magnetic-field uniformity is of the utmost importance in experiments to measure the electric dipole moment of the neutron. A general parametrization of the magnetic field in terms of harmonic polynomial modes is proposed, going beyond the linear- gradients approximation. We review the main undesirable effects of nonuniformities: depolarization of ultracold neutrons and Larmor frequency shifts...

Università della Svizzera italiana

HTLV-1 propels thymic human T cell development in “human immune system” Rag2-/- gamma c-/- Mice

Villaudy, Julien ; Wencker, Mélanie ; Gadot, Nicolas ; Gillet, Nicolas A. ; Scoazec, Jean-Yves ; Gazzolo, Louis ; Manz, Markus G. ; Bangham, Charles R. M. ; Duc Dodon, Madeleine

In: Plos pathogens, 2011, vol. 7, no. 9, p. e1002231

Alteration of early haematopoietic development is thought to be responsible for the onset of immature leukemias and lymphomas. We have previously demonstrated that TaxHTLV-1 interferes with ß- selection, an important checkpoint of early thymopoiesis, indicating that human T-cell leukemia virus type 1 (HTLV-1) infection has the potential to perturb thymic human αβ T-cell development. To...

Università della Svizzera italiana

An anti-HIV-1 V3 loop antibody fully protects cross-clade and elicits T-cell immunity in macaques mucosally challenged with an R5 clade C SHIV

Watkins, Jennifer D. ; Siddappa, Nagadenahalli B. ; Lakhashe, Samir K. ; Humbert, Michael ; Sholukh, Anton ; Hemashettar, Girish ; Wong, Yin Ling ; Yoon, John K. ; Wang, Wendy ; Novembre, Francis J. ; Villinger, Francois ; Ibegbu, Chris ; Patel, Kalpana ; Corti, Davide ; Agatic, Gloria ; Vanzetta, Fabrizio ; Bianchi, Siro ; Heeney, Jonathan L. ; Sallusto, Federica ; Lanzavecchia, Antonio ; Ruprecht, Ruth M.

In: Plos one, 2011, vol. 6, no. 3, p. e18207

Neutralizing antibodies have been shown to protect macaques against SHIV challenge. However, genetically diverse HIV-1 clades have evolved, and a key question left unanswered is whether neutralizing antibodies can confer cross-clade protection in vivo. The novel human monoclonal antibody HGN194 was isolated from an individual infected with an HIV-1 clade AG recombinant circulating recombinant...

Università della Svizzera italiana

Crystal structure and size-dependent neutralization properties of HK20, a human monoclonal antibody binding to the highly conserved heptad repeat 1 of gp41

Sabin, Charles ; Corti, Davide ; Buzon, Victor ; Seaman, Mike S. ; Hulsik, David Lutje ; Hinz, Andreas ; Vanzetta, Fabrizia ; Agatic, Gloria ; Silacci, Chiara ; Mainetti, Lara ; Scarlatti, Gabriella ; Sallusto, Federica ; Weiss, Robin ; Lanzavecchia, Antonio ; Weissenhorn, Winfried

In: Plos pathogens, 2010, vol. 6, no. 11, p. e1001195

The human monoclonal antibody (mAb) HK20 neutralizes a broad spectrum of primary HIV-1 isolates by targeting the highly conserved heptad repeat 1 (HR1) of gp41, which is transiently exposed during HIV-1 entry. Here we present the crystal structure of the HK20 Fab in complex with a gp41 mimetic 5-Helix at 2.3 A° resolution. HK20 employs its heavy chain CDR H2 and H3 loops to bind into a...

Università della Svizzera italiana

Analysis of memory B cell responses and isolation of novel monoclonal antibodies with neutralizing breadth from HIV-1-infected individuals

Corti, Davide ; Langedijk, Johannes P. M. ; Hinz, Andreas ; Seaman, Michael S. ; Vanzetta, Fabrizia ; Fernandez-Rodriguez, Blanca M. ; Silacci, Chiara ; Pinna, Debora ; Jarrossay, David ; Balla-Jhagjhoorsingh, Sunita ; Willems, Betty ; Zekveld, Maria J. ; Dreja ; O’Sullivan, Eithne ; Pade, Corinna ; Orkin, Chloe ; Jeffs, Simon A. ; Montefiori, David C. ; David, Davis ; Weissenhorn, Winfried ; McKnight, Aine ; Heeney, Jonathan L. ; Sallusto, Federica ; Sattentau, Quentin J. ; Weiss, robin A. ; Lanzavecchia, Antonio

In: Plos one, 2010, vol. 5, no. 1, p. e8805

Background The isolation of human monoclonal antibodies (mAbs) that neutralize a broad spectrum of primary HIV-1 isolates and the characterization of the human neutralizing antibody B cell response to HIV-1 infection are important goals that are central to the design of an effective antibody-based vaccine. Methods and Findings We immortalized IgG+ memory B cells from individuals infected with...

Université de Fribourg

Reducing the Clique and Chromatic Number via Edge Contractions and Vertex Deletions

Paulusma, Daniël ; Picouleau, Christophe ; Ries, Bernard

In: Lecture Notes in Computer Science, 2016, vol. 9849, p. 38-49

We consider the following problem: can a certain graph parameter of some given graph G be reduced by at least d, for some integer d, via at most k graph operations from some specified set S, for some given integer k? As graph parameters we take the chromatic number and the clique number. We let the set S consist of either an edge contraction or a vertex deletion. As all these problems are...