Now showing items 134-153 of 2142

• #### Bistability and oscillations in co-repressive synthetic microbial consortia ﻿

(2017)
Background: Synthetic microbial consortia are conglomerations of genetically engineered microbes programmed to cooperatively bring about population-level phenotypes. By coordinating their activity, the constituent strains ...
• #### Blind test of density-functional-based methods on intermolecular interaction energies ﻿

(2016)
In the past decade, a number of approaches have been developed to fix the failure of (semi)local density-functional theory (DFT) in describing intermolecular interactions. The performance of several such approaches with ...
• #### Blind Test of Methods for Obtaining 2-D Near-Surface Seismic Velocity Models from First-Arrival Traveltimes ﻿

(2013-09)
Seismic refraction methods are used in environmental and engineering studies to image the shallow subsurface. We present a blind test of inversion and tomographic refraction analysis methods using a synthetic first-arrival-time ...
• #### Border patrol: Insights into the unique role of perlecan/heparan sulfate proteoglycan 2 at cell and tissue borders ﻿

(2014)
The extracellular matrix proteoglycan (ECM) perlecan, also known as heparan sulfate proteoglycan 2 or HSPG2, is one of the largest (>ﾠ200ﾠnm) and oldest (>ﾠ550ﾠMﾠyears) extracellular matrix molecules. In vertebrates, ...

(2012-06)
• #### Bose-Einstein Condensation of 84Sr ﻿

(2009)
We report Bose-Einstein condensation of Sr84 in an optical dipole trap. Efficient laser cooling on the narrow intercombination line and an ideal s-wave scattering length allow the creation of large condensates (N0∼3×105) ...
• #### Bose-Einstein condensation of 88Sr through sympathetic cooling with 87Sr ﻿

(2010-05-05)
We report Bose-Einstein condensation of Sr88, which has a small, negative s-wave scattering length (a88=−2a0). We overcome the poor evaporative cooling characteristics of this isotope by sympathetic cooling with Sr87 atoms. ...
• #### Bose-Einstein condensation of lithium ﻿

(1997)
Bose-Einstein condensation of 7Li has been studied in a magnetically trapped gas. Because of the effectively attractive interactions between 7Li atoms, many-body quantum theory predicts that the occupation number of the ...
• #### Bose-Einstein Condensation of Lithium: Observation of Limited Condensate Number ﻿

(1997)
Bose-Einstein condensation of 7Li has been studied in a magnetically trapped gas. Because of the effectively attractive interactions between 7Li atoms, many-body quantum theory predicts that the occupation number of the ...
• #### Bose-Einstein correlations in $pp, p\mathrm{Pb}$, and PbPb collisions at $\sqrt{{s}_{NN}}=0.9--7$ TeV ﻿

(2018)
Quantum-statistical (Bose-Einstein) two-particle correlations are measured in pp collisions at √s=0.9, 2.76, and 7 TeV, as well as in pPb and peripheral PbPb collisions at nucleon-nucleon center-of-mass energies of 5.02 ...
• #### Bose-Fermi mapping and a multibranch spin-chain model for strongly interacting quantum gases in one dimension: Dynamics and collective excitations ﻿

(2016)
We show that the wave function in one spatial sector x1<x2<⋯<xN (with xi being the coordinate of the ith particle) of a one-dimensional spinor gas with contact s-wave interaction, either bosonic or fermionic, can be mapped ...
• #### Bosonic molecules in a lattice: Unusual fluid phase from multichannel interactions ﻿

(2018)
We show that multichannel interactions significantly alter the phase diagram of ultracold bosonic molecules in an optical lattice. Most prominently, an unusual fluid region intervenes between the conventional superfluid ...
• #### Bounds on geologically current rates of motion of groups of hot spots ﻿

(2017)
It is widely believed that groups of hot spots in different regions of the world are in relative motion at rates of 10 to 30 mm a−1 or more. Here we present a new method for analyzing geologically current motion between ...
• #### Bridging quantum and classical plasmonics with a quantum-corrected model ﻿

(2012)
Electromagnetic coupling between plasmonic resonances in metallic nanoparticles allows for engineering of the optical response and generation of strong localized near-fields. Classical electrodynamics fails to describe ...
• #### Bright matter wave solitons in Bose–Einstein condensates ﻿

(2003)
We review recent experimental and theoretical work on the creation of bright matter wave solitons in Bose–Einstein condensates. In two recent experiments, solitons are formed from Bose–Einstein condensates of  7Li by ...
• #### Bright Soliton Trains of Trapped Bose-Einstein Condensates ﻿

(2002)
We variationally determine the dynamics of bright soliton trains composed of harmonically trapped Bose-Einstein condensates with attractive interatomic interactions. In particular, we obtain the interaction potential between ...
• #### Broadband Absorption Engineering to Enhance Light Absorption in Monolayer MoS2 ﻿

(2016)
Here we take a first step toward tackling the challenge of incomplete optical absorption in monolayers of transition metal dichalcogenides for conversion of photon energy, including solar, into other forms of energy. We ...
• #### BROADBAND SPECTRAL INVESTIGATIONS OF SGR J1550–5418 BURSTS ﻿

(2012)
We present the results of our broadband spectral analysis of 42 SGR J1550−5418 bursts simultaneously detected with the Swift/X-ray Telescope (XRT) and the Fermi/Gamma-ray Burst Monitor (GBM), during the 2009 January active ...
• #### Broadband, Polarization-Sensitive Photodetector Based on Optically-Thick Films of Macroscopically Long, Dense, and Aligned Carbon Nanotubes ﻿

(2013)
Increasing performance demands on photodetectors and solar cells require the development of entirely new materials and technological approaches.Wereport on the fabrication and optoelectronic characterization of a photodetector ...
• #### Building a Partnership with a Campus Communication Center ﻿

(2018)
Although abundant evidence in STEM education literature emphasizes the incorporation of both primary literature analysis and communication of science into the undergraduate classroom, biology educators are rarely given the ...