Browsing by Keywords "Dynamics"
Now showing items 1-20 of 35
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The adiabatic and non-adiabatic behavior of a particle in optical lattices
(Bilkent University, 2018-06)The cold atom experiments provide a clean and controlled environment for realizing many body systems. Recent realizations of artificial gauge fields and adjustable optical lattices paved the way for the study of effectively ... -
An analytical solution to the stance dynamics of passive spring-loaded inverted pendulum with damping
(World Scientific, 2009-09)The Spring-Loaded Inverted Pendulum (SLIP) model has been established both as a very accurate descriptive tool as well as a good basis for the design and control of running robots. In particular, approximate analytic ... -
Attractive versus repulsive excitonic interactions of colloidal quantum dots control blue-to red-shifting (and non-shifting) amplified spontaneous emission
(American Chemical Society, 2013-11-21)Tunable, high-performance, two-photon absorption (TPA)-based amplified spontaneous emission (ASE) from near-unity quantum efficiency colloidal quantum dots (CQDs) is reported. Besides the absolute spectral tuning of ASE, ... -
An automotive vehicle dynamics prototyping platform based on a remote control model car
(2013)The use of a modified remote control (RC) model car as a vehicle dynamics testing and development platform is detailed. Vehicle dynamics testing is an important aspect of automotive engineering and it plays a key role ... -
Capital dependent population growth induces cycles
(Elsevier, 2011-09)Cobb–Douglas type production functions and time-delay are not sufficient for the economy to behave cyclic. However, capital dependent population dynamics can enforce Hopf bifurcation. 2011 Elsevier Ltd. All rights reserved. -
Capital maintenance versus technology adoption under embodied technical progress
(B E Press, 2006)We study an optimal growth model with one-hoss-shay vintage capital, where labor resources can be allocated freely either to production, technology adoption or capital maintenance. Technological progress is partly embodied. ... -
Concurrent design of energy management and vehicle stability algorithms for a parallel hybrid vehicle using dynamic programming
(AACC, 2012-06)In this paper, concurrent design of controllers for a vehicle equipped with a parallel hybrid powertrain is studied. Our work focuses on designing the two control algorithms, the energy management and the vehicle stability, ... -
Development of a rapid-scan fiber-integrated terahertz spectrometer
(Springer New York LLC, 2014)Scientists in terahertz (THz) wave technologies have benefited from the recent developments in ultrafast laser technologies and RF technologies and applied these new gained techniques into characterizing a wide variety of ... -
Dynamic Boundary Control of a Euler-Bernoulli Beam
(Institute of Electrical and Electronics Engineers, 1992)We consider a flexible beam clamped to a rigid base at one end and free at the other end. To stabilize the beam vibrations, we propose a dynamic boundary force control and a dynamic boundary torque control applied at the ... -
Dynamic boundary control of the timoshenko beam
(Pergamon Press, 1992)We consider a clamped-free Timoshenko beam. To stabilize the beam vibrations, we propose a dynamic boundary control law applied at the free end of the beam. We prove that with the proposed control law, the beam vibrations ... -
Dynamic modeling and gait analysis for miniature robots in the absence of foot placement control
(Institute of Electrical and Electronics Engineers Inc., 2019)The study of animals and insects have led to realization that animals select their gaits, patterns of leg movement, according to speed. For proper gait planning, the legs must be controlled for proper foot placement with ... -
Essays on growth and macroeconomic dynamics
(Bilkent University, 2015-09)This dissertation is composed of four essays on economic growth and macro- economic dynamics. The first essay analyzes how the dynamic strategic in- teractions among agents a¤ect the long-run distribution of wealth in ... -
Four essays on overlapping generations resource economies : optimality, sustainability and dynamics
(Bilkent University, 2012)This dissertation is made up of four essays on overlapping generations resource economies. The Örst essay studies the e§ects of energy saving technological progress and substitution of renewable energy resources with ... -
Impurity coupled to an artificial magnetic field in a Fermi gas in a ring trap
(American Physical Society, 2015)The dynamics of a single impurity interacting with a many-particle background is one of the central problems of condensed-matter physics. Recent progress in ultracold-atom experiments makes it possible to control this ... -
Independent estimation of input and measurement delays for a hybrid vertical spring-mass-damper via harmonic transfer functions
(IFAC, 2015-06)System identification of rhythmic locomotor systems is challenging due to the time-varying nature of their dynamics. Even though important aspects of these systems can be captured via explicit mechanics-based models, it ... -
Lattice dynamics and elastic properties of lanthanum monopnictides
(2008)In this study, first principles calculation results of the second order elastic constants and lattice dynamics of two lanthanum monopnictides, LaN and LaBi, which crystallize in rock-salt structure (B1 phase), are presented. ... -
Local asymptotic stability conditions for the positive equilibrium of a system modeling cell dynamics in leukemia
(Springer, Berlin, Heidelberg, 2012)A distributed delay system with static nonlinearity has been considered in the literature to study the cell dynamics in leukemia. In this chapter local asymptotic stability conditions are derived for the positive equilibrium ... -
Low-order controller design for haptic systems under delayed feedback
(2012)In this paper, we consider PD controller design for haptic systems under delayed feedback. More precisely, we present a complete stability analysis of a haptic system where local dynamics are described by some second-order ... -
Modeling and animation of brittle fracture in three dimensions
(Bilkent University, 2007)This thesis describes a system for simulating fracture in brittle objects. The system combines rigid body simulation methods with a constraint-based model to animate fracturing of arbitrary polyhedral shaped objects under ... -
Multi-exciton states in flexible Rydberg aggregates
(Bilkent University, 2017-07)Flexible Rydberg aggregates, assemblies of highly excited atoms, provide a platform to investigate quantum phenomena like energy transport and conical intersections. This can be achieved by doping the aggregate with an ...
