Display-camera communication has become a promising direction in both computer vision and wireless communication communities. However, the consistency of the channel measurement is an open issue since precise calibration of the experimental setting has not been fully studied in the literatures. This paper focuses on establishing a scheme for precise calibration of the display-camera channel per...

INTRODUCTION The calibration of whole-body counter (WBC), that means the determination of the body burden of radionuclides, is generally carried out by comparing the measurements between the human body and the standard calibration phantom. The measured counting efficiency is affected by the deference of size, shape and distribution of radioactivity between them. Therefore, if the standard phant...

Time Domain Reflectometry (TDR) is a well-established technique for the development of microwave sensors devoted to the dielectric characterization of materials. In particular the TDR has become the standard method for measuring soil water content. Although the response of the TDR signal is strictly related to the medium moisture content, it is also affected by several others factors related to...

A method for calibrating iodine-125 seeds in terms of exposure has been established. The standard free-air ionization chamber, used for measuring soft x rays, was chosen for the measurements. Arrays of four to six seeds were used to enhance the ionization-current-to-background-current ratio. Seeds from an array were measured individually in a re-entrant chamber. The quotient of the exposure rat...

We revise and update SNO-STR-92-094 to identify and quantify sources of systematic uncertainty in determining the efficiency for detecting neutrons resulting from the neutralcurrent neutrino disintegration of deuterium. We conclude that aUowing for two standardized neutron sources (one strong, one weak) that can be moved vertically within the cylinder defined by projecting the vessel neck downw...

This paper describes the context for and creation of a strategic planning model of a major U.S. railway. The key factors in choosing a system dynamics approach are presented, and the synergy between the new model and the existing suite of planning applications is highlighted. The overall structure of the model is reviewed, including the key reinforcing and balancing loops, and model creation is...

Time-of-flight (TOF) cameras based on the Photomixing Detector (PMD) technology are capable of measuring distances to objects at high frame rates, making them valuable for many applications in robotics and computer vision. The distance measurements they provide, however, are affected by many factors, systematic and otherwise, incurring the need for calibrating them. This paper presents a techni...

BACKGROUND Osteoporotic hip fractures with a significant morbidity and excess mortality among the elderly have imposed huge health and economic burdens on societies worldwide. In this age- and sex-matched case control study, we examined the risk factors of hip fractures and assessed the fracture risk by conditional logistic regression (CLR) and ensemble artificial neural network (ANN). The perf...