Objectives: Several methods of image acquisition are accessible in dentistry. There is no overall acceptable method for image digitization so all different types of images can be comparable. The objective of this study was to compare the diagnostic accuracy of different methods of image digitization. Methods: This accuracy diagnostic test study used perceptibility curve test which first intr...

Ruled surface is widely used in engineering design such as parting surface design of injection mold and checking surface design of checking fixture, which are usually generated by offsetting 3D curves. However, in 3D curve offset, there often exist break/interaction/overlapping problems which can't be solved by current CAD software automatically. This paper is targeted at developing a 3D curve ...

INTRODUCTION Presently, it is difficult to predict which patients are at increased risk of ongoing pain problems postoperatively. This study followed a group of patients from the week before their operation until 3 months after it, to identify potential risk variables. METHODS Fifty-four patients undergoing moderate-major gynaecological surgery at Christchurch Women's Hospital were recruited ...

BACKGROUND The impact of dizziness on quality of life is often assessed by the Dizziness Handicap Inventory (DHI), which is used as a discriminate and evaluative measure. The aim of the present study was to examine reliability and validity of a translated Norwegian version (DHI-N), also examining responsiveness to important change in the construct being measured. METHODS Two samples (n = 92 a...

In this research project, we try to find out how well we can point to core-collapse supernova by detecting supernova neutrino events in a water detector, and to investigate improvement of the pointing algorithm. A refined model is created of supernova neutrinos in which scattered electron events and 30 times more positron events are generated after a burst of supernova neutrinos has propagated ...

Receiver operating characteristic (ROC) analysis is the commonly accepted method for comparing diagnostic imaging systems. In general, ROC studies are designed in such a way that multiple readers read the same images and each image is presented by means of two different imaging systems. Statistical methods for the comparison of the ROC curves from one reader have been developed, but extension o...

This paper shows that when a classifier is evaluated with nonrandom test data, ROC curves differ from the ROC curves that would be obtained with a random sample. To address this bias, this paper introduces a procedure for plotting ROC curves that are inferred from nonrandom test data. I provide simulations and an example with wine data to illustrate the procedure as well as the magnitude of bia...

Engineers in the manufacturing industries have used accelerated test (AT) experiments for many decades. The purpose of AT experiments is to acquire reliability information quickly. Test units of a material, component, subsystem, or entire systems are subjected to higher-than-usual levels of one or more accelerating variables such as temperature or stress. Then the AT results are used to predict...

Two groups of 10 healthy ambulatory subjects, i.e., a group of 10 persons less than or equal to 30 years of age (mean age, 27.6 years) and a group of 10 persons greater than or equal to 65 years of age (mean age, 70 years), were randomized in a single-trial crossover design to receive 1 and 2 g of cefoperazone with a 1-week washout between doses. The elderly subjects had both decreased estimate...