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.
Results
Showing 1 to 20 of 57 for “"size and power"”.
-
Size and Power of Tests of Hypotheses on Parameters When Modeling Time-to-Event Data with the Lindley Distribution
… proceeds by estimating parameters in the model and testing hypotheses about the parameters based on their estimates; validity of inferences from tests of hypotheses about the parameters depends on size and power of the tests. The Lindley model is considered, in this dissertation, as an …
-
Electronics for a Versatile and Robust Retarding Potential Analyzer for Nano-Satellite Platforms
… in-situ measurements of ion density, temperature and speed relative to the satellite frame. The instrument works by changing the voltage on one of a set of grids and measuring a corresponding current generated by ions flowing through the grid, generating a function of current vs. voltage called an …
-
Fiscal Competition Among Jurisdictions: Evidence and Methodology
… GMM versions of the Wald, the Likelihood ratio and the Lagrange multiplier test statistics for spatial lag dependence are based on the GMM estimator suggested by Kelejian and Robinson (1993), and on the work of Newey and West (1987). The tests are asymptotically distributed as chi-squared random …
-
Design for low-power high-density helmet dispensing and collection systems for urban environments
In this thesis, we designed and implemented a machine to dispense and collect helmets for bike-share programs such as Boston's Hubway. Design of the machine was guided under several constraints including size and power for tight integration with existing bikeshare stations. The machine itself is …
-
Design of control electronics for the Ram Energy Distribution Detector
… the neutral gas at altitudes between about 200 and 600 km is an important factor in predicting the onset of plasma instabilities that are known to distort and/or disrupt high frequency radio communications. A ram wind sensor is a space science instrument that, when mounted on a satellite in …
-
Optimization of Nonlinear Switch Cells for Switching Converters
<p>Switch cells consist of an array of power switches and passive components which can replace the main switches alone in many power topologies, allowing reduced switching loss without altering the power topology directly. This thesis discusses the development of a switch cell topology that …
-
Three Essays in Econometrics
… to the literature on multiple comparisons and specification testing for multivariate models, through the lens of model selection procedures in asset pricing. In the first chapter, I provide a model selection procedure for multivariate models, generalizing the model confidence set (MCS) …
-
Development of an Imager System Optimized for Low-Power, Limited-Bandwidth Space Applications
A relatively new picosatellite standard, CubeSats have traditionally been used for simple educational missions. As CubeSats become more complex and utilize more complex sensors such as imagers, they gain enhanced credibility as satellite platforms. Imaging systems on CubeSats have the potential to …
-
Testing for jumps and cojumps in financial markets
… process that follows a semimartingale, and with no other specific assumptions on the process, we form a test statistic which can easily disentangle jumps from continuous paths of the process. We prove that the test statistics are chi-square distributed in the absence of jumps in any …
-
Functional Anova Models With Application to Corporate Bonds
… resampling residuals at each time point; and resampling residuals curves. The other approaches were permutation tests with two separate resampling approaches: reassigning labels to all factors at the same time; and reassigning labels to one factor at a time.</p> <p>We carried out a …
-
Methods of sample size calculation for clinical trials
Sample size calculations should be an important part of the design of a trial, but are researchers choosing sensible trial sizes? This thesis looks at ways of determining appropriate sample sizes for Normal, binary and ordinal data. The inadequacies of existing sample size and power calculation …
-
Sample Size Calculation Based on the Semiparametric Analysis of Short-term and Long-term Hazard Ratios
We derive sample size formulae for survival data with non-proportional hazard functions under both fixed and contiguous alternatives. Sample size determination has been widely discussed in literature for studies with failure-time endpoints. Many researchers have developed methods with the …
-
Low power data acquisition for microImplant biometric monitoring of tremors
… the medical industry have created a growing demand for implantable medical devices. In particular, the need to provide doctors a means to continuously monitor biometrics over long time scales with increased precision is paramount to efficient healthcare. To make medical implants more attractive, …
-
The role of technical improvements in decarbonising passenger transport
… due to difficulties in reducing travel demand and shifting to alternative modes of travel. However, the rate at which technical improvements can be deployed is highly uncertain. Furthermore, the benefits of technical efficiency improvements may be offset by consumer trends towards larger …
-
Power and Sample Size for Three-Level Cluster Designs
Over the past few decades, Cluster Randomized Trials (CRT) have become a design of choice in many research areas. One of the most critical issues in planning a CRT is to ensure that the study design is sensitive enough to capture the intervention effect. The assessment of power and sample size in …
-
Design and fabrication of a flexible membrane ultrasound transducer
… by facilitating continuous, real-time, and direct measurement of physiological phenomena, such as blood pressure. Currently, ultrasound is not used in wearable health sensing applications because clinical ultrasound systems are expensive, bulky, and require high operating power. …
-
Investigation on Ultra-miniature and Ultra-low-power Non-invasive CMOS pH Sensor for Intracellular Monitoring
The intrinsic multilayer process and the dense transistor capacity of complementary metal oxide semiconductor (CMOS) technology has offered a great compact solution for miniaturized noninvasive pH sensors. Existing solutions to intracellular sensing are mainly through invasive approaches, which …
-
A systems analysis of CubeSat constellations with distributed sensors
… use of CubeSat constellations as "gap fillers" and supplements to traditionally complex, multi-sensored satellites, increasing resiliency of the system at very low cost. In standard satellite acquisitions, satellites can take years and billions of dollars to reach operational status. Should …
-
Circuit design and technological limitations of silicon RFICs for wireless applications
… over the past decade, bringing added convenience and accessibility through advantages in cost, size, and power dissipation. A better understanding of how an IC technology affects critical RF signal chain components will greatly aid the design of wireless systems and the development of process …
-
Evaluation of GLO: a Solar Occultation Instrument for Measuring Atmospheric Trace Species on CubeSat Missions
… mission design depends on minimizing payload size and power. This thesis investigates the GLO (GFCR (Gas Filter Correlation Radiometry) Limb Occultation) prototype, a new small-form-factor design that enables sub-kilometer resolution of the vertical profile of atmospheric trace species to …
Page 1 of 3