Browsing School of Engineering by Title
Now showing items 1920-1939 of 2975
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Nonlinear Frequency Scattering of Broadband Noise in Turbomachinery (AIAA 2010-3805)
(2010)Coherence based source analysis techniques can be used to identify the contribution of broadband noise sources in the exhaust of a gas turbine and hence enable the design of noise reduction devices. However, when the ... -
Nonlinear impedance of a microwave-driven Josephson junction with noise
(American Physical Society, 2000)The nonlinear impedance of a point Josephson junction is calculated under various conditions for the resistively shunted junction model in the presence of noise. The calculation proceeds by solving the Langevin equation ... -
Nonlinear model predictive control to reduce pitch actuation of floating offshore wind turbines
(2020)Modern-day wind turbines use active pitch control to reduce mechanical loads on the turbines in addition to regulating generator power. These control algorithms increase blade pitch actuation, primarily to reduce the 1P ... -
Nonlinear Model-Data Fusion with Minimal Sensing for Performance-Based Seismic Monitoring of Instrumented Buildings
(2023)This paper presents a new concept for performance-based monitoring (PBM) of instrumented buildings subject to earthquakes. This concept is achieved by simultaneously combining and advancing existing knowledge from structural ... -
Nonlinear noninertial response of a Brownian particle in a tilted periodic potential to a strong ac force
(American Physical Society, 2000)The solution of the Langevin equation describing the dynamics of a Brownian particle in a tilted periodic potential in the overdamped limit is obtained in terms of a matrix continued fraction, allowing us to evaluate ... -
Nonlinear noninertial response of a quantum Brownian particle in a tilted periodic potential to a strong ac force as applied to a point Josephson junction
(American Physical Society, 2009)The quantum Smoluchowski equation for the reduced Wigner function in configuration space pertaining to the quantum Brownian motion of a particle in a tilted cosine potential in the high dissipation (or noninertial) limit ... -
Nonlinear noninertial response of a quantum Brownian particle in a tilted periodic potential to a strong ac force as applied to a point Josephson junction
(2009)The normal phase diffusion problem in magnetic resonance imaging (MRI) is treated by means of the Langevin equation for the phase variable using only the properties of the characteristic function of Gaussian random variables. ... -
Nonlinear response of dipolar systems to superimposed ac and dc bias fields
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2016)The main purpose of this thesis is to study the nonlinear ac stationary response of dipolar systems to superimposed ac and dc bias fields via the rotational Brownian motion model. In this way we investigate (i) the nonlinear ... -
Nonlinear response of permanent dipoles in a uniaxial potential to alternating fields
(American Physical Society, 2005)It is shown how the existing theory of the dynamic Kerr effect and nonlinear dielectric relaxation based on the noninertial Brownian rotation of noninteracting rigid dipolar particles may be generalized to take into account ... -
Nonlinear vibro-acoustic behaviour in a circular membrane oscillator
(2009)Oscillating systems that produce noise at a frequency of excitation may have as an abatement solution the increase of the frequency of excitation to above the audible frequency limit, viz. 20kHz. This approach may not ... -
Notch and Mean Stress Effect in Fatigue as Phenomena of Elasto-Plastic Inherent Multiaxiality
(2011)The present paper summarises an attempt of estimating fatigue lifetime of notched metallic materials by directly accounting for the degree of multiaxiality of the local elasto-plastic stress/strain fields acting on the ... -
A Note on the Convergence Analysis of LMS Adaptive Filters with Gaussian Data
(ISI Web of Science, 1988)Necessary and sufficient conditions fur the convergence of LMS adaptive filters with Gaussian data have been established by Horowitz and Senne [3], with the recent support of Feuer and Weinstein [4]. A feature of both ... -
A novel antibacterial and biocompatible Ta-Ag coating fabricated by cold spray technology
(2023)Infection caused by bacterial contamination is a critical problem challenging the successful use of medical implants in orthopaedic and dental applications. Consequently, medical implants with antibacterial abilities ... -
A Novel Linear Air Amplifier Technology to Replace Rotary Fans in Data Center Server Rack Cooling
(2020)This paper investigates the potential of a novel linear airflow amplifier designed to replace rotary fans for various industries where their performance is undesirable like electronics cooling applications in compact data ... -
A novel ultra-large flat plate heat pipe manufactured by thermal spray
(Elsevier BV, 2020)An ultra-large flat plate copper heat pipe (180 × 180 mm2) was constructed using a thermal spray technique, and it was then thermally characterized. A porous copper wick was fabricated by using a flame spray torch to deposit ... -
Nozzle Geometry Effects in Liquid Jet Array Impingement
(Elsevier, 2009)The use of impinging liquid jets in electronics thermal management is attracting some consideration due to their very high heat transfer coefficients, hot spot targeting capabilities and moderate hydraulic power requirements. ... -
Nozzle-internal particle velocity measurements and loading effect on particle acceleration inside a Cold Spray nozzle
(2017)The advantages of the solid state deposition process Cold Spray (CS) over conventional spray technologies go hand in hand with the requirement of high and well-predictable particle velocities. The ... -
Numerical analysis of acoustic noise from an electronic cooling fan at flow disturbed by an external obstacle
(internoise2022.org, 2022-08-24)Axial cooling fans are widely used in data center dense Hard Disk Drive (HDD) storage systems. However, these fans emit high noise levels and degrade HDD performance at certain frequencies. Flow at the fan's inlet can ... -
Numerical and Experimental Investigation of the Seismic Performance of Steel Concentrically Braced Frame Structures
(Trinity College Dublin. School of Engineering. Disc of Civil Structural & Environmental Eng, 2019)The concepts of performance-based earthquake engineering (PBEE) and performance based seismic design (PBSD) emerged after the 1994 Northridge and 1995 Kobe earthquakes, where the level of damage to structures, economic ...