Now showing items 16283-16302 of 61262

• #### Experimental evidence of genome-wide impact of ecological selection during early stages of speciation-with-gene-flow ﻿

(2015)
Theory predicts that speciation-with-gene-flow is more likely when the consequences of selection for population divergence transitions from mainly direct effects of selection acting on individual genes to a collective ...
• #### Experimental evidence that both parties benefit in a facultative plant-spider mutualism ﻿

(2004-06)
Spiders are known to influence plant fitness, and vice versa. Yet, it has not been appreciated that these facultative relationships can be mutualistic. I examined the interaction between Phryganoporus candidus, a subsocial ...
• #### Experimental evolution of TetX2: Correlating changes in fitness to their structural and functional origins ﻿

(2012)
The study of protein evolution and adaptation resides at the junction between the disciplines of biological chemistry and evolutionary biology. We chose the B. thetaiotaomicron tetracycline resistant enzyme TetX2, as our ...
• #### Experimental Free Energy Landscape Reconstruction of DNA Unstacking Using Crooks Fluctuation Theorem ﻿

(2013-06-05)
Nonequilibrium work theorems, such as the Jarzynski equality and the Crooks fluctuation theorem, allow one to use nonequilibrium measurements to determine equilibrium free energies. For example, it has been demonstrated ...
• #### Experimental investigation and constitutive modeling of marine clay ﻿

(1993)
A new cross-anisotropic elasto-plastic constitutive model is developed based on experimental observations of marine clay from the Gulf of Mexico. Standard triaxial and torsional simple shear tests performed on the ...
• #### Experimental investigation for constitutive modeling of fine sand under cyclic loading using hollow cylinder specimens ﻿

(1991)
An experimental program for the understanding of the behavior of fine cohesionless soil under monotonic and cyclic loading and for the development and refinement of constitutive models has been undertaken. An experimental ...

(1978)
• #### Experimental investigation of crust-mantle hybridization in the Earth’s shallow upper mantle ﻿

(2014-11-13)
Chemical heterogeneities in the Earth’s mantle, such as subducted sediments and oceanic crust, along with volatiles such as H2O and CO2 affect melting processes, hence, chemical differentiation of the Earth and their ...
• #### Experimental Measurement of Self-Diffusion in a Strongly Coupled Plasma ﻿

(2016)
We present a study of the collisional relaxation of ion velocities in a strongly coupled, ultracold neutral plasma on short time scales compared to the inverse collision rate. The measured average velocity of a tagged ...

(1951-10)
• #### Experimental observation of incoherent-coherent crossover and orbital-dependent band renormalization in iron chalcogenide superconductors ﻿

(2015)
The level of electronic correlation has been one of the key questions in understanding the nature of superconductivity. Among the iron-based superconductors, the iron chalcogenide family exhibits the strongest electron ...
• #### Experimental observation of the photon structure function at 21 GeV ﻿

(1998)
The triggered photon structure function at center-of-mass energy 21 GeV is measured from the interaction $\gamma$p $\to$ jets. Descriptions of the experimental apparatuses are given and the physics goals of the experiment ...
• #### Experimental Realization of an Exact Solution to the Vlasov Equations for an Expanding Plasma ﻿

(2007-10-08)
• #### Experimental realization of crossover in shape and director field of nematic tactoids ﻿

(2015)
Spindle-shaped nematic droplets (tactoids) form in solutions of rod-like molecules at the onset of the liquid crystalline phase. Their unique shape and internal structure result from the interplay of the elastic deformation ...
• #### Experimental results and three-dimensional simulations of instabilities in a rotating lid-driven cylinder ﻿

(2012)
An experimental setup for a rotating lid-driven cylinder problem is designed and constructed in the context of modeling bulk semiconductor crystal growth techniques. Details concerning construction of the experimental setup ...
• #### Experimental setup for the operation of gas electron multipliers in liquid-gas xenon detectors ﻿

(2004)
A setup for the realization of dual-phase experiments using xenon as the active medium in a radiation detector has been built. The setup consists of a gas purification system capable of achieving a purity of the gas in the ...
• #### EXPERIMENTAL SIMULATION OF THERMAL MATURATION IN SEDIMENTARY ORGANIC MATTER. (VOLUMES I AND II) ﻿

(1981)
This study simulates thermal maturation of liptinitic and humic organic matter (Phosphoria shale and Rattlesnake Butte lignite) by isothermal pyrolysis at temperatures of 230(DEGREES), 275(DEGREES) and 325(DEGREES)C for ...

(1970-10)
• #### Experimental studies of di-jets in Au + Au collisions using angular correlations with respect to back-to-back leading hadrons ﻿

(2013)
Jet-medium interactions are studied via a multihadron correlation technique (called “2+1”), where a pair of back-to-back hadron triggers with large transverse momentum is used as a proxy for a di-jet. This work extends the ...
• #### Experimental studies of nucleate pool boiling from artificial active sites ﻿

(1963)
Artificial active sites were studied during nucleate pool boiling of degassed carbon tetrachloride. The pressure of the system was controlled a t one and also at one and one-half atmospheres. Dynamic two phase behavior ...