Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 83 for “"AFC"”.
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Understanding Adult Foster Care Through Provider Experiences
In this study, I explored Adult Foster Care (AFC) provider experiences. AFC is a small-setting option for community-based long-term care. This option varies considerably in accessibility and structure across states; due to the nature of the state's approach to AFC, this initial research effort …
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Design and control of a long stroke fast tool servo
… inner loop, an adaptive feedforward cancelation (AFC) outer loop, and command pre-shifting. For the FTS controller, the AFC resonators are placed in the forward path which creates infinite gain at the resonator frequency. The controller for the hydrostatic stage consists of a conventional lead-lag …
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Modeling and Analysis of Actinide Diffusion Behavior in Irradiated Metal Fuel
… The DOE-sponsored Advanced Fuels Campaign (AFC) has performed various experiments that are ready for analysis. Current metal fuel performance codes are either not available to the AFC or have limitations and deficiencies in predicting AFC fuel performance. A modified version of a new fuel …
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Adaptive feedforward cancellation viewed from an oscillator amplitude control perspective
… properties of Adaptive Feedforward Cancellation (AFC) for use on fast tool servos in high-precision turning applications. Previous work has shown that classical control techniques can be used to analyze the stability and robustness of an AFC loop. However, determination of the convergence and …
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Rail transit OD matrix estimation and journey time reliability metrics using automated fare data
The availability of automatic fare collection (AFC) data greatly enhances a transit planner's ability to understand and characterize passenger travel demands which have traditionally been estimated by manual surveys handed out to passengers at stations or on board vehicles. The AFC data also …
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The value of automated fare collection data for transit planning : an example of rail transit OD matrix estimation
… obtained from new Automated Fare Collection (AFC) technologies. By adding this dataset, transit agencies can boost their analytical capabilities and deal with some planning questions that they previously could not easily address. In fact, while with surveys and manual counts transit agencies …
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Associations of parental age, socioeconomic status, antral follicle count with assisted reproductive technology treatment outcomes
… status (SES), and antral follicle count (AFC) are significantly and independently associated with adverse ART outcomes. There is little known about their interaction effects with an unhealthy lifestyle on adverse ART outcomes. This PhD study investigated the associations of parental age, …
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Development of a multi-breed heifer pregnancy genetic evaluation in beef cattle
… series of evaluations for age at first calving (AFC), which also served as an important investigation as AFC was a potential age covariate in HP evaluations. Models were implemented using single-breed populations and then combined into a larger multi-breed population so heterosis and breed …
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Assessing Journey Time Impacts of Disruptions on London's Piccadilly Line
… those incidents using automated fare collection (AFC) data; and third, an exploration of the potential use of AFC data in real-time applications to monitor service. The proposed approach is applied to the Piccadilly Line, one of the London Underground's major rail lines. The line suffers from …
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Bus passenger Origin-Destination Matrix estimation using Automated Data Collection systems
… data including Automated Fare Collection (AFC data, Automatic Passenger Count (APC data, and Automatic Vehicle Location (AVL) data. This algorithm consists of three steps: data preparation, estimation of a Single Route OD Matrices for all routes, and estimation of a Network Level OD Matrix …
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Evaluación de daños a los árboles de futura cosecha causados por un aprovechamiento mejorado en un bosque de la zona de Río San Juan, Nicaragua
… se seleccionaron 545 árboles de futura cosecha (AFC) a partir de 20 cm dap (13.6 árboles/ha). Este n-cimero es relativamente alto, ya que fueron consideradas 24 especies con valor actualmente comercial. Se destaca la abundante presencia de Virola koschyi (Cebo), Carapa guianensis (Cedro macho), y …
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2GHz W-CDMA Radio Transceiver
… control (AGC) and automatic frequency control (AFC), and one common synthesizer. Data exchange between the radio and the baseband processor takes place in an 8-bit digital format. Digital-to-analog converters (DAC) at the transmitter and analog- to-digital converters (ADC) at the receivers …
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SUPPRESSION OF HARMONIC TORQUE AND HARMONIC CURRENT IN PERMANENT MAGNET SYNCHRONOUS MOTOR
… the proposed adaptive feedforward controller (AFC) in parallel with the FOC current control. Similarly, harmonic torque load was cancelled by proposing an AFC in parallel with the speed control loop. Harmonic torque originated in the motor mainly due to harmonic flux where cancelled through the …
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Efeito do cromossomo x no mapeamento de regiões genômicas sobre características de interesse econômico em búfalos da raça murrah
… to reproductive traits (age at first calving – AFC, first calving interval – CFI1, and second calving interval – CFI2) in Murrah buffaloes. CFI1 represents the period from an animal's calving to the subsequent one during its first lactation, while CFI2 refers to the interval between the second …
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Feasibility Study of a Multi-Purpose Aircraft Concept with a Leading-Edge Cross-Flow Fan
… was first proposed as an active flow control (AFC) device nearly 40 years ago. The CFF can be employed as a propulsion device as well as a high-lift system. This thesis research focuses on investigating the use of CFF as a high-lift device for an Extremely Short Take-off and Landing (ESTOL) …
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Microfluidic H2/O2 fuel cells for contaminant and electrode analysis
Alkaline fuel cells (AFCs) are promising power sources due to superior cathode kinetics as compared to acidic media and the ability to use inexpensive non-noble metal catalysts. However, carbonate formation from carbon dioxide in air has long been considered a significant hurdle for liquid …
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The development of a membraneless direct borohydride alkaline fuel cell
… out of these the alkaline fuel cell (AFC) shows increased electrode kinetics over other fuel cell types. The direct borohydride alkaline fuel cell (DBAFC), a derivative of the AFC, can provide increased power output and improved safety features afforded using borohydride in place of …
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Development of the low damage self-centering Sliding Hinge Joint
… sliding in Asymmetric Friction Connections (AFCs). The AFC is a type of slotted bolted connection, which is installed in the bottom web and bottom flange bolt groups. Previous studies showed that under a major earthquake, the SHJ undergoes permanent losses in elastic strength due to bolt …
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Passenger-to-train assignment model based on automated data
… records from Automatic Fare Collection (AFC) system and (ii) the train tracking data from Automatic Train Regulation (ATR) system. The proposed Passenger-to-Train Assignment Model (PTAM) can provide a better understanding of capacity utilization and help assess the service quality in …
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Nonlinear Estimation and Control Methods for Mechanical and Aerospace Systems under Actuator Uncertainty
… due to their simplicity, active flow control (AFC) methods can achieve improved flight performance over a wider range of time-varying operating conditions by automatically adjusting their level of control actuation in response to real-time sensor measurements. Although several methods for AFC …
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