Now showing items 15677-15736 of 59723

• #### EXPERIMENTAL DISENGAGEMENT OF MORPHOGENETIC PROCESSES AND ITS EFFECTS ON PRIMORDIAL GERM CELL COLONIZATION OF THE GONADAL RIDGES IN RANA PIPIENS ﻿

(1986)
During normal embryogenesis in Rana pipiens the primordial germ cells (PGCs) undergo a displacement from deep within the ventral endoderm of the Stage 17 tailbud embryo to the dorsal endodermal crest of the hatched Stage ...
• #### Experimental evaluation of explicit and symbolic automata-theoretic algorithms ﻿

(2006)
The automata-theoretic approach to the problem of program verification requires efficient minimization and complementation of nondeterministic finite automata. This work presents a direct empirical comparison of well-known ...
• #### 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 ...

(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 ...

(1969)
• #### Experimental studies of the fractional quantum Hall effect and the Wigner solids ﻿

(2010)
This Ph.D. thesis is composed of two parts: the first part is concerned with electron transport in the higher Landau levels (LL) in a two-dimensional electron system (2DES); the second part is focused on the Wigner Crystal ...
• #### Experimental study of (He_,d) and (He_,t) reactions on Be_ and B__ ﻿

(1966)
The reactions Be9(He3,d)B110, Be9(He3, t)B9, B11(He3d )C12, and B11(He3, t )C11 were studied using a doubly ionized 10 MeV He3 beam. Particles were detected in a Delta E, E solid state counter telescope. The Delta E and E ...
• #### Experimental study of heat transfer to hypersonic nozzle walls ﻿

(1963)
The heat transfer rate from a high enthalpy gas to the walls of a diverging nozzle, through which the gas was flowing, has been experimentally determined. The experimental results are compared with the predictions of several ...

(1978)
• #### Experimental Study of Potassium and Strontium Rydberg Atoms - Chaotic Ionization, Quantum Optical Phenomena and Multiphoton Excitation ﻿

(2014-04-24)
Very-high-n (n~300) Rydberg atoms serve as a powerful tool to study chaos and quantum optical phenomena. Measurements using a series of alternating impulsive kicks applied to potassium Rydberg atoms reveal that a phase ...

(1978)
• #### Experimental study of the degree of ionization of a partially ionized gas flowing in a hypersonic nozzle ﻿

(1963)
The primary objective of this work was to experimentally determine the degree of ionization in a partially ionized gas flowing in a converging-diverging nozzle. Stagnation point Langmuir probes were employed for this ...
• #### Experimental study of the effect of commercial dispersants on the precipitation, aggregation and deposition of asphaltenes ﻿

(2015-11-30)
Asphaltene precipitation and subsequent deposition is a potential flow assurance problem for the oil industry nowadays. Moreover, because oil production is moving to more difficult production environments – e.g. deeper ...
• #### Experimental system identification of model frames using frequency-domain and time-domain methods ﻿

(1994)
Two different metal test frames are excited using the impact-hammer method. The force-input and specific acceleration-output time-histories were recorded, and through frequency-domain, and time-domain structural system ...
• #### Experimental test of the effects of supportive breeding on wild populations ﻿

(2008)
Supportive breeding is currently being used in the management of threatened populations, but the effects of this management strategy remain relatively untested. The common house fly, Musca domestica, was used as a model ...
• #### Experimental/analytical approaches to modeling, calibrating and optimizing shaking table dynamics for structural dynamic applications ﻿

(1998)
This thesis presents an Experimental/Analytical approach to modeling and calibrating shaking tables for structural dynamic applications. This approach was successfully applied to the shaking table recently built in the ...
• #### Experiments and Modeling of Ternary Alloy Semiconductors ﻿

(2012)
Results of the growth of Ga 1-x In x Sb crystals as the pseudobinary Ga 1-x Sb--In x Sb are presented. Special focus is given to the relationship between crystal composition and the cut-off wavelength of transmission for ...
• #### Experiments in acoustic levitation: Surface tension and viscosity of deformed droplets ﻿

(1995)
Acoustic levitation permits the observation of individual oscillating liquid droplets. Droplet shape oscillation data lead to thermophysical property measurements without the contaminating effects of a solid container. For ...

(1951)

(1950)
• #### Experiments towards size and dopant control of germanium quantum dots for solar applications ﻿

(2016)
While the literature for the doping of silicon quantum dots (QDs) and nanocrystals (NCs) is extensive, reports of doping their germanium analogs are sparse. We report a range of attempts to dope Ge QDs both during and ...
• #### Expert System Framework for Fault Detection and Fault Tolerance in Robotics ﻿

(1992-11-01)
Fault tolerance is of increasing importance for modern autonomous industrial robots. The ability to detect and tolerate failures will enable robots to effectively cope with internal failures and continue performing assigned ...
• #### Expert System Framework for Fault Detection and Fault Tolerance in Robotics ﻿

(1994-01-01)
Fault tolerance is of increasing importance for modern robots. The ability to detect and tolerate failures enables robots to effectively cope with internal failures and continue performing assigned tasks without the need ...

(1958-10-17)
• #### Experts Look at Berlin Problem ﻿

(1959-03-20)
• #### Explaining the commercial peace: Costs, information, and signaling ﻿

(2006)
Over the last several years, dozens of quantitative studies have analyzed the relationship between economic interdependence and conflict. Most studies show that it decreases the likelihood of war. This thesis delves more ...

(2013)

(1976-07)
• #### Explicit Discontinuous Galerkin Methods for Linear Hyperbolic Problems ﻿

(2013-11-14)
Discontinuous Galerkin methods have many features which make them a natural candidate for the solution of hyperbolic problems. One feature is flexibility with the order of approximation; a user with knowledge of the ...
• #### EXPLICIT FINITE DIFFERENCE SCHEMES BASED ON THE MODIFIED METHOD OF CHARACTERISTICS AND THEIR APPLICATION TO THE MISCIBLE DISPLACEMENT PROBLEM ﻿

(1985)
A class of convection-diffusion parabolic boundary value problems is considered in this study. When convection dominates over diffusion, the solutions of such problems exhibit an almost hyperbolic behavior. Initial conditions ...
• #### Explicit Lower Bounds of the Hausdorff Dimension of Certain Self Affine Sets ﻿

(1995-01-20)
A lower bound of the Hausdorff dimension of certain self-affine sets is given. Moreover, this and other known bounds such as the box dimension are expressed in terms of solutions of simple equations involving the singular ...
• #### Explicit or Symbolic Translation of Linear Temporal Logic to Automata ﻿

(2013-07-24)
Formal verification techniques are growing increasingly vital for the development of safety-critical software and hardware in practice. Techniques such as requirements-based design and model checking for system verification ...
• #### An explicit time evolution method for acoustic wave propagation ﻿

(2014)
Cost-effective waveform modeling is the key to practical reverse time migration (RTM) and full-waveform inversion (FWI) implementations. We evaluated an explicit time evolution (ETE) method to efficiently simulate wave ...
• #### Exploded graces: Providence and the Confederate Israel in evangelical southern sermons, 1861-1865 ﻿

(1990)
The confidence of Confederate evangelicals in the support of providence inspired southern clergymen to demand the transformation of the independent South into a nineteenth-century covenant nation--a "Confederate Israel." ...
• #### Exploiting address space contiguity to accelerate TLB miss handling ﻿

(2010)
The traditional CPU-bound applications of the past have been replaced by multiple concurrent data-driven applications that use lots of memory. These applications, including databases and virtualization, put high stress on ...
• #### Exploiting balanced trees in the computation of elementary flux modes via breadth-first search ﻿

(2006)
In order to rationally design bacteria to produce large quantities of their precious metabolic by-products, we must first understand the metabolic pathways that lead from a starting material (e.g., glucose) to a metabolic ...
• #### Exploiting channel symmetry in two-way channels ﻿

(2010)
Wireless communication is frequently employed for the bi-directional exchange of information between devices with disparate capabilities. Mobile devices such as cellular phones and laptops are subject to stringent size ...
• #### Exploiting Feedback in Cooperative Relay Networks ﻿

(2005-08-01)
Recent results on multiple antenna transmission techniques have shown great po- tential in their ability to improve the overall performance in fading channels. Despite the promise shown by employing multiple antenna's, ...
• #### Exploiting Instruction-Level Parallelism for Memory System Performance ﻿

(2000-08-20)
Current microprocessors improve performance by exploiting instruction-level parallelism (ILP). ILP hardware techniques such as multiple instruction issue, out-of-order (dynamic) issue, and non-blocking reads can accelerate ...
• #### Exploiting instruction-level parallelism for memory system performance ﻿

(2000)
Current microprocessors improve performance by exploiting instruction-level parallelism (ILP). ILP hardware techniques such as multiple instruction issue, out-of-order (dynamic) issue, and non-blocking reads can accelerate ...
• #### Exploiting new terrain: An advantage to sociality in the slime mold Dictyostelium discoideum ﻿

(2006)
Identifying benefits to cooperation is important in studying social evolution. When the social amoebae of Dictyostelium discoideum starve, they aggregate to form multicellular slugs that migrate towards the soil surface ...
• #### Exploiting Predictable Observer Mobility for Power Efficient Sensor Network Communication ﻿

(2003-04-20)
This thesis introduces techniques that exploit predictable mobility of the observer (data sink) to reduce communication range, thereby saving power in wireless sensor networks (WSNs). The movement of public transport ...
• #### Exploiting predictable observer mobility for power-efficient sensor network communication ﻿

(2003)
This thesis introduces techniques that exploit predictable mobility of the observer (data sink) to reduce communication range, thereby saving power in wireless sensor networks (WSNs). The movement of public transport ...