Browsing by Keywords "Stability"
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An analytical solution to the stance dynamics of passive springloaded inverted pendulum with damping
(2010)The SpringLoaded 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 ... 
Better stability with measurement errors
(Springer New York LLC, 201606)Often it is desirable to stabilize a system around an optimal state. This can be effectively accomplished using feedback control, where the system deviation from the desired state is measured in order to determine the ... 
A characterization of the optimal set of linear programs based on the augmented lagrangian
(Taylor & Francis, 1999)It is proved that in a certain neighborhood of the optimal set of multipliers, the set of minimizers of the augmented lagrangian nmction generates a new characterization of the optimal solution set of the linear program. 
The coauthors' problem revisited : from networks to covers
(Bilkent University, 2010)In this thesis, we reexamine the Coauthors’ Problem, introduced by Jackson and Wolinsky, 1996. We propose the Extended Coauthor Model using the cover notion, allowing for multilateral links among authors. We study ... 
Coincidence of Myerson allocation rule with Shapley value
(Bilkent University, 2003)This thesis studies the coincidence of the Myerson allocation rule in the context of networks with the Shapley value in the context of transferable utility games. We start with a value function defined on networks and ... 
Constructing convex directions for stable polynomials
(IEEE, 2000)The constructions of convex directions based on phasederivative interpretations were obtained for Hurwitzstable polynomials. The phasederivative conditions were based on the sensitivity of rootlocus associated with the ... 
Control and stabilization of a rotating flexible structure
(Elsevier, 1994)We consider a flexible beam clamped to a rigid base at one end and free at the other end. We assume that the rigid base rotates with a constant angular velocity and that the motion of the flexible beam takes place on a ... 
Controlled enzymatic stability and release characteristics of supramolecular chiral peptide amphiphile nanofiber gels
(Elsevier B.V., 2017)Supramolecular bioarchitectures formed by assembly of achiral or chiral building blocks play important roles in various biochemical processes. Stereochemistry of amino acids is important for structural organization of ... 
Decentralized stabilization of interconnected systems: Structural conditions
(1992)A unified framework is provided for the design of highgain decentralized controllers for the stabilization of several classes of interconnected systems. These classes are characterized in terms of the structure of the ... 
Dipolar boseeinstein condensate in a cylindrically symmetric trap
(Bilkent University, 201608)BoseEinstein Condensate (BEC) and particularly its stability dynamics has been a subject to many investigations since the first realization of this new condensed state in alkali atoms interacting via short range potential. ... 
Dynamic boundary control of the timoshenko beam
(Pergamon Press, 1992)We consider a clampedfree 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 ... 
A dynamic control law for the wave equation
(Elsevier, 1994)We consider a system described by the onedimensional linear wave equation in a bounded domain with appropriate boundary conditions. To stabilize the system, we propose a dynamic boundary controller applied at the free end ... 
Effects of temperature, pH and counterions on the stability of peptide amphiphile nanofiber structures
(Royal Society of Chemistry, 2016)Peptide amphiphiles are a class of selfassembling molecules that are widely used to form bioactive nanostructures for various applications in bionanomedicine. However, peptide molecules can exhibit distinct behaviors under ... 
Efficiency and stability of probabilistic assignments in marriage problems
(Academic Press, 2016)We study marriage problems where two groups of agents, men and women, match each other and probabilistic assignments are possible. When only ordinal preferences are observable, stochastic dominance efficiency (sdefficiency) ... 
An exponential stability result for the wave equation
(Elsevier, 2002)We consider a system described by the onedimensional linear wave equation in a bounded domain with appropriate boundary conditions. To stabilize this system, we propose a dynamic boundary controller applied at the free ... 
Fixed order controller design via parametric methods
(Bilkent University, 2003)In this thesis, the problem of parameterizing stabilizing fixedorder controllers for linear timeinvariant singleinput singleoutput systems is studied. Using a generalization of the HermiteBiehler theorem, a new ... 
Generating robust and stable schedules in a single machine environment
(2004)Scheduling is a decision making process that concerns with allocation of limited resources (machines, material handling equipment, operators, tools, etc.) to competing tasks (operations of jobs) over time with the goal of ... 
Hedging production schedules against uncertainty in manufacturing environment with a review of robustness and stability research
(Taylor & Francis, 2009)Scheduling is a decisionmaking process that is concerned with the allocation of limited resources to competing tasks (operations of jobs) over a time period with the goal of optimising one or more objectives. In theory, ... 
Highstability, highefficiency organic monoliths made of oligomer nanoparticles wrapped in organic matrix
(American Chemical Society, 2016)Oligomer nanoparticles (OL NPs) have been considered unsuitable for solidstate lighting due to their low quantum yields and low temperature stability of their emission. Here, we address these problems by forming highly ... 
Improved performance of organic lightemitting diodes with MoO3 interlayer by oblique angle deposition
(Optical Society of America, 2011)We fabricated and demonstrated improved organic light emitting diodes (OLEDs) in a thin film architecture of indium tin oxide (ITO)/molybdenum trioxide (MoO3) (20 nm)/ N,N'Di(naphth2yl)N,N'diphenylbenzidine (NPB) (50 ...