Search results for: Caleb King

Items from 1 to 9 out of 9 results

article

An empirical semiparametric one‐sided confidence bound for lower quantiles of distributions with positive support

Caleb King, Peter Parker, Derek S. Young

Quality and Reliability Engineering International > 40 > 4 > 1618 - 1635

In many industries, the reliability of a product is often determined by a quantile of a distribution of a product's characteristics meeting a specified requirement. A typical approach to address this is to assume a parametric model and compute a one‐sided confidence bound on the quantile. However, this can become difficult if the sample size is too small to reliably estimate such a parametric model...

article

A general construction method for component orthogonal arrays

Chunyan Wang, Caleb King, Dennis K. J. Lin

Quality and Reliability Engineering International > 40 > 1 > 712 - 721

Order‐of‐addition (OofA) experiments have gained renewed attention in recent years, especially in regard to their design. For these experiments, the response is determined by the order in which components are added. A particularly useful design introduced in OofA experiments is the component orthogonal array (COA). The COA maintains pairwise balance between any two components while also ensuring each...

article

Discussion of ‘Is designed data collection still relevant in the Big Data era?'

Caleb King, Bradley Jones

Quality and Reliability Engineering International > 39 > 4 > 1110 - 1113

Given the popularity of Big Data (BD), there can be an impression that fields such as design of experiments (DOE) are now irrelevant. We would like to thank the authors for starting the conversation about the possible relationship between these two fields. A key contribution of this paper is in showing how DOE principles, as summarized under the name designed data collection (DDC), can be applied...

article

Direct construction of globally D‐optimal designs for factors at two levels and main effects models

Caleb King, Bradley Jones, Joseph Morgan, Ryan Lekivetz

Quality and Reliability Engineering International > 36 > 3 > 797 - 816

In developing screening experiments for two‐level factors, practitioners typically are familiar with regular fractional factorial designs, which are orthogonal, globally D‐optimal (ie, 100% D‐efficient), and exist if

N

is a power of two. In addition, nonregular D‐optimal orthogonal designs can be generated for almost any

N

a multiple of four, the most notable being the family of Plackett and Burman...

article

Robustness of asymptotic accelerated life test plans to small‐sample settings

Caleb King

Quality and Reliability Engineering International > 35 > 7 > 2178 - 2201

Much of the statistical literature on optimal test planning for accelerated life testing utilize asymptotic methods to derive optimal test plans. While sufficient effort is made to assess the robustness of these test plans to the choice of design parameters and distribution assumptions, there is very little literature on the performance of asymptotic test plans relative to small samples (on the order...

article

Poverty analysis using small area estimation: an application to conservation agriculture in Uganda

Jarrad Farris, Catherine Larochelle, Jeffrey Alwang, George W. Norton, more

Agricultural Economics > 48 > 6 > 671 - 681

This article demonstrates the utility of small area estimation of poverty (SAEp) methods for researchers wishing to conduct a detailed welfare analysis as part of a larger survey of a small geographic area. This study applies SAEp methods as part of an impact assessment of a conservation agriculture production system in Eastern Uganda. Using SAEp, we estimate Foster–Greer–Thorbecke rural poverty indices,...

article

Product Component Genealogy Modeling and Field‐failure Prediction

Caleb King, Yili Hong, William Q. Meeker

Quality and Reliability Engineering International > 33 > 1 > 135 - 148

Many industrial products consist of multiple components that are necessary for system operation. There is an abundance of literature on modeling the lifetime of such components through competing risks models. During the life‐cycle of a product, it is common for there to be incremental design changes to improve reliability, to reduce costs, or due to changes in availability of certain part numbers...

article

Practical considerations for the use of pollen δ¹³C value as a paleoclimate indicator

D. Caleb King, Brian A. Schubert, A. Hope Jahren

Rapid Communications in Mass Spectrometry > 26 > 18 > 2165 - 2172

RATIONALEWorkers have shown a correlation between temperature and the pollen δ¹³C value, and therefore suggested using pollen δ¹³C values to reconstruct paleotemperature. To evaluate the potential for pollen δ¹³C values to be used as a paleotemperature proxy, it is essential to quantify the variability in pollen δ¹³C values and to evaluate the effect of temperature on pollen δ¹³C values, in isolation,...

article

Detection of tetrodotoxin from the grey side-gilled sea slug - Pleurobranchaea maculata, and associated dog neurotoxicosis on beaches adjacent to the Hauraki Gulf, Auckland, New Zealand

Paul McNabb, Andrew I. Selwood, Rex Munday, Susanna A. Wood, more

Toxicon > 2010 > 56 > 3 > 466-473

Investigations into a series of dog poisonings on beaches in Auckland, North Island, New Zealand, resulted in the identification of tetrodotoxin (TTX) in the grey side-gilled sea slug, Pleurobranchaea maculata. The levels of TTX in P. maculata, assayed by liquid chromatography-mass spectrometry (LC-MS) ranged from 91 to 850 mg kg ^-1 with a median level of 365 mg kg ^-1 (n = 12). In...

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