801 Hits in 2.5 sec

Effective-Resistance-Reducing Flows, Spectrally Thin Trees, and Asymmetric TSP [article]

Nima Anari, Shayan Oveis Gharan
2015 arXiv   pre-print
resistance of every edge in F w.r.t.  ...  We show that the integrality gap of the natural LP relaxation of the Asymmetric Traveling Salesman Problem is polyloglog(n).  ...  We would like to thank James R Lee, Satish Rao, Amin Saberi, Luca Trevisan, and Umesh Vazirani for enlightening and stimulating discussions.  ... 
arXiv:1411.4613v4 fatcat:cafqmktkrvbmfhfti3hadefysa

Atomic Oxygen-Resistant Polyimide Composite Films Containing Nanocaged Polyhedral Oligomeric Silsesquioxane Components in Matrix and Fillers

Yan Zhang, Hao Wu, Yi-dan Guo, Yan-bin Yang, Qiang Yu, Jin-gang Liu, Bo-han Wu, Feng-zhu Lv
2021 Nanomaterials  
POSS components endowed the PI composite films excellent AO resistance and self-healing characteristics in AO environments.  ...  In this work, we successfully prepared a series of novel AO resistant PI composite films containing nanocaged polyhedral oligomeric silsesquioxane (POSS) components in both the PI matrix and the fillers  ...  After several decades of basic and applied studies for the AO erosion mechanisms of standard PI films, there have been establishing some effective procedures for enhancing the AO-resistant abilities of  ... 
doi:10.3390/nano11010141 pmid:33435592 fatcat:3bsxrbsf2zdbbmyxrvi4zfiemi

Vitamin D supplementation lowers thrombospondin-1 levels and blood pressure in healthy adults

Anjalee T. Amarasekera, Bahador Assadi-Khansari, Saifei Liu, Marilyn Black, Greer Dymmott, Natasha M. Rogers, Aaron L. Sverdlov, John D. Horowitz, Doan T. M. Ngo, David D. Roberts
2017 PLoS ONE  
Plasma concentrations of asymmetric dimethylarginine (ADMA), thrombospondin-1 (TSP-1), plasminogen activator inhibitor-1 (PAI-1), hs-CRP, activin-A, and follistatin-like 3 (FSTL3) were quantitated.  ...  Since TSP-1 suppresses signaling of NO, it is possible that the fall in BP is engendered by restoration of NO effect.  ...  We now describe that a simple, safe, cheap and commonly used therapy as vitamin D supplementation can reduce TSP-1 levels and potentially have beneficial effects on cardiovascular health.  ... 
doi:10.1371/journal.pone.0174435 pmid:28489857 pmcid:PMC5425007 fatcat:wz2uhw52avgkxbbz4lqlkm4axm

Thermal creation of electron spin polarization in n-type silicon

André Dankert, Saroj P. Dash
2013 Applied Physics Letters  
The thermal origin of the spin injection has been confirmed by the quadratic scaling of the spin signal with the Joule heating current and linear dependence with the heating power.  ...  The variation of TSP 2 vs. bias voltage is presented in Fig. 2 (d) and is found to be asymmetric.  ...  This results in the detected spin signal (spin resistance area product, spin RA) which is proportional to TSP 2 Â s sf .  ... 
doi:10.1063/1.4845295 fatcat:4ec2sjhzpzdvjoduetidct44sm

Self-Healing Anti-Atomic-Oxygen Phosphorus-Containing Polyimide Film via Molecular Level Incorporation of Nanocage Trisilanolphenyl POSS: Preparation and Characterization

Bohan Wu, Yan Zhang, Dayong Yang, Yanbin Yang, Qiang Yu, Li Che, Jingang Liu
2019 Polymers  
Incorporation of TSP–POSS further enhances the AO resistance of the FPI/TSP composite films via a Si–P synergic effect. Meanwhile, the thermal stability of the pristine film is maintained.  ...  In the current research, a series of novel organic/inorganic nanocomposite films with excellent atomic oxygen (AO) resistance are prepared from the phosphorous-containing polyimide (FPI) matrix and trisilanolphenyl  ...  Thirdly, the AO resistance of the FPI matrix film was significantly enhanced via the Si-P synergic effect.  ... 
doi:10.3390/polym11061013 pmid:31181709 pmcid:PMC6630743 fatcat:btsktkibgvbq3jfo3nyuqeusuq

Preparation and Characterization of Transparent Polyimide Nanocomposite Films with Potential Applications as Spacecraft Antenna Substrates with Low Dielectric Features and Good Sustainability in Atomic-Oxygen Environments

Yan Zhang, Bo-han Wu, Han-li Wang, Hao Wu, Yuan-cheng An, Xin-xin Zhi, Jin-gang Liu
2021 Nanomaterials  
properties and reduced dielectric parameters.  ...  ] (6FPI) was combined with a nanocage trisilanolphenyl polyhedral oligomeric silsesquioxane (TSP-POSS) additive in order to afford novel organic–inorganic nanocomposite films with enhanced AO-resistant  ...  The introduction of TSP-POSS into the matrix might be an effective method to enhance the AO-resistant properties of the pristine polymer.  ... 
doi:10.3390/nano11081886 pmid:34443717 pmcid:PMC8398456 fatcat:j2l44txii5fcfmmyve2oq6hep4

Photodynamic Therapy-mediated Cancer Vaccination Enhances Stem-like Phenotype and Immune Escape, Which Can Be Blocked by Thrombospondin-1 Signaling through CD47 Receptor Protein

Yuanhong Zheng, Fangyuan Zou, Jingjing Wang, Guifang Yin, Vanminh Le, Zhewei Fei, Jianwen Liu
2015 Journal of Biological Chemistry  
Results: Tumor cells that escaped from PDT-mediated vaccination exhibited enhanced stem-like phenotypes and undermined immunogenicity, which were prevented by interfering TSP-1/CD47/SIRP-␣ signal axis.  ...  These findings prove that the TSP-1/CD47/ SIRP-␣ signal axis is important to the evolution of tumor cells in the microenvironment of immunotherapy and identify thrombospondin-1 as a key signal with therapeutic  ...  FIGURE 5 . 5 TSP-1 prevented the stem-like and immune-resistant phenotype of immune-selected tumor cells in the presence of CD47.  ... 
doi:10.1074/jbc.m114.624965 pmid:25697354 pmcid:PMC4423687 fatcat:adptpnj3kvcwrg253ct3p4y36m

Tissue-Specific Promoters Active in CD44+CD24-/low Breast Cancer Cells

G. J. Bauerschmitz, T. Ranki, L. Kangasniemi, C. Ribacka, M. Eriksson, M. Porten, I. Herrmann, A. Ristimaki, P. Virkkunen, M. Tarkkanen, T. Hakkarainen, A. Kanerva (+3 others)
2008 Cancer Research  
It has been proposed that human tumors contain stem cells that have a central role in tumor initiation and posttreatment relapse.  ...  We thank Eerika Karli and Aila Karioja-Kallio for superb assistance.  ...  Flow cytometry. Expression of CD44 and CD24 in tumors (n = 7 per group) was measured by flow cytometry after 17 d of treatment.  ... 
doi:10.1158/0008-5472.can-07-5288 pmid:18632604 fatcat:22cvlyj2abe4dkr7vpbdlgavqu

Structural basis for fragmenting the exopolysaccharide of Acinetobacter baumannii by bacteriophage ΦAB6 tailspike protein

I-Ming Lee, I-Fan Tu, Feng-Ling Yang, Tzu-Ping Ko, Jiahn-Haur Liao, Nien-Tsung Lin, Chung-Yi Wu, Chien-Tai Ren, Andrew H.-J. Wang, Ching-Ming Chang, Kai-Fa Huang, Shih-Hsiung Wu
2017 Scientific Reports  
While carbapenem and colistin are used in first-line treatments 3 , antibiotic-resistant strains are emerging 2 , likely due to this pathogen acquiring antibiotic-resistant genes from other Acinetobacter  ...  Previous studies of TSP structures, such as TSPs from bacteriophages P22, Sf6 and HK620, including oligosaccharide complexes have shed light on the substrate binding modes and catalytic mechanisms 14-16  ...  We thank the staffs of the beamlines 15A1, 13B1, and 13C1 in the National Synchrotron Radiation Research Center (Hsinchu, Taiwan) and the staffs of the beamlines 44XU and 12B2 in SPring-8 (Japan) for assistance  ... 
doi:10.1038/srep42711 pmid:28209973 pmcid:PMC5314372 fatcat:gdclkkwmjbhgxa6up5voukdkje

Electimize: New Evolutionary Algorithm for Optimization with Application in Construction Engineering

Ahmed Khalafallah, Mohamed Abdel-Raheem
2011 Journal of computing in civil engineering  
However, in many cases, vii To Allah viii ACKNOWLEDGMENTS My sincere thanks and gratitude go to my advisor, Dr.  ...  Optimization is considered an essential step in reinforcing the efficiency of performance and economic feasibility of construction projects.  ...  The TSP problem can either be symmetric or asymmetric.  ... 
doi:10.1061/(asce)cp.1943-5487.0000080 fatcat:5bybjxmgirfr7jg3uemyky3dbq

Angiogenesis in health and disease

Peter Carmeliet
2003 Nature Medicine  
ACKNOWLEDGMENTS The author thanks all members of the Center for Transgene Technology and Gene Therapy and all external collaborators, and A. Vandenhoeck for artwork.  ...  that reduce flow and result in vessel regression.  ...  TSP-1 inhibits angiogenesis through direct effects on ECs and indirect effects on growth factor mobilization or activation 107 .  ... 
doi:10.1038/nm0603-653 pmid:12778163 fatcat:zcfgglx7vbbslkndorekbtodqm

Use of a Ceramic Membrane to Improve the Performance of Two-Separate-Phase Biocatalytic Membrane Reactor

Giuseppe Ranieri, Rosalinda Mazzei, Zhentao Wu, Kang Li, Lidietta Giorno
2016 Molecules  
The asymmetric ceramic hollow fibre membranes were prepared using a combined phase inversion and sintering technique.  ...  Ceramic membranes are an attractive alternative to polymeric membranes in membrane biotechnology due to their high chemical, thermal and mechanical resistance.  ...  Figure 1 shows morphologies of asymmetric alumina hollow fiber membranes resulting from an internal coagulant flow rate of 5, 10, 20 mL/min.  ... 
doi:10.3390/molecules21030345 pmid:26985887 fatcat:kxawmxhpevhfvndbdughadwxiu

Magnetically engineered spintronic sensors and memory

S. Parkin, Xin Jiang, C. Kaiser, A. Panchula, K. Roche, M. Samant
2003 Proceedings of the IEEE  
Both GMR and MTJ devices are examples of spintronic materials in which the flow of spin-polarized electrons is manipulated by controlling, via magnetic fields, the orientation of magnetic moments in inhomogeneous  ...  engineered magnetic thin-film materials suitable for advanced magnetic sensors and magnetic random access memories.  ...  Harris and G. Solomon for their contributions to our work on the magnetic tunneling transistor.  ... 
doi:10.1109/jproc.2003.811807 fatcat:xbw4bzcw2bcuzogfhb4a5qelby

The Synthesis and Properties of Liquid Crystalline Polyurethanes, Chemically Modified by Polyhedral Oligomericsilsesquioxanes

Artur Bukowczan, Edyta Hebda, Maciej Czajkowski, Krzysztof Pielichowski
2019 Molecules  
The incorporation of silsesquixanes into the LC matrix leads to higher melting and isotropization temperatures along with the broadening phase transition effect.  ...  In the first step, 4,4′-methylenephenyl diisocyanate (MDI) and polytetramethylene ether glycol (PTMG) reacted with functionalized trisilanolphenyl POSS (TSP-POSS) bearing three hydroxyl groups.  ...  The reinforcement properties of TSP-POSS were observed for the samples with 50% and 60% elastic segments. Such an effect is a result of good dispersion of POSS in a less elastic matrix.  ... 
doi:10.3390/molecules24224013 pmid:31698774 pmcid:PMC6891628 fatcat:zwzor7ywfrhbblwtifvmoiut24

Expression and Immunogenicity of the Mycobacterial Ag85B/ESAT-6 Antigens Produced in Transgenic Plants by Elastin-Like Peptide Fusion Strategy

Doreen Manuela Floss, Michael Mockey, Galliano Zanello, Damien Brosson, Marie Diogon, Roger Frutos, Timothée Bruel, Valérie Rodrigues, Edwin Garzon, Claire Chevaleyre, Mustapha Berri, Henri Salmon (+2 others)
2010 Journal of Biomedicine and Biotechnology  
Purified TBAg-ELP was obtained by the highly efficient, cost-effective, inverse transition cycling (ICT) method and tested in mice.  ...  These findings showed that the native Ag85B and ESAT-6 mycobacterial B- and T-cell epitopes were conserved in the plant-expressed TBAg-ELP.  ...  Helmold, and I. Tillack.  ... 
doi:10.1155/2010/274346 pmid:20414351 pmcid:PMC2855997 fatcat:f7lsgm2lffb2vf73ak54p5lffa
« Previous Showing results 1 — 15 out of 801 results