Due to the direct influence of night vision equipment availability on the safety of night-time aerial reconnaissance, maintenance needs to be carried out regularly. Unfortunately, some defects are not easy to observe or are not even detectable by human eyes. As a consequence, this study proposed a novel automatic defect detection system for aviator's night vision imaging systems AN/AVS-6(V)1 an...

Software inspections, which were originally developed by Michael Fagan in 1976, are an important means to verify and achieve sufficient quality in many software projects today. Since Fagan’s initial work, the importance of software inspections has been long recognized by software developers and many organizations. Various proposals have been made by researchers in the hope of improving Fagan’s ...

background: the hygienic issues are the essential criteria in the primary site selection, compatibility and maintain of passengers health after use of the services. qom with 17 million annual tourists is the second religious tourism center in iran. the aim of this study was to investigate the impact of the public residential centers internal managers’ educational status on their environmental h...

in this paper, absorbing markov chain models are developed to determine the optimum process mean levels for both a single-stage and a serial two-stage production system in which items are inspected for conformity with their specification limits. when the value of the quality characteristic of an item falls below a lower limit, the item is scrapped. if it falls above an upper limit, the item is ...

In this paper we consider the inspection of a product of which several characteristics have to satisfy given specification limits. A problem which occurs in the inspection process quite often is that a measurement error occurs in measuring the characteristics. Therefore, it is common practice to inspect each characteristic by comparing its measurement to a test limit which is slightly more stri...

Nowadays, we need to efficiently control key parameters of the shot-peening process such as shot size, energy and peening angle, to ensure a positive and optimum effect on fatigue life. A good way to help us in adjustment of these parameters is to observe the resulting coverage after peening. Manual measurement and control of peening coverage – which consist of a visual inspection step by an op...

We present an optimization model to find joint inspection and maintenance policies for infrastructure facilities under performance model uncertainty. The objective in the formulation is to minimize the total expected social cost of managing facilities over a finite planning horizon. As in recent optimization models, performance model uncertainty is accounted for by representing facility deterio...

A general theoretical procedure is presented to remove known probe-position errors in spherical near-field data to obtain highly accurate far fields. We represent the measured data as a Taylor series in terms of the displacement errors and the ideal spectrum of the antenna. This representation is then assumed to be an actual near field on a regularly spaced error-free spherical grid. The ideal ...

The vision-screening program for 3.5-year-old children in Japan consists of 3 steps:questionnaires and home visual acuity testing, visual acuity testing by nurses and inspection by medical officers at regional Public Health Centers, and examinations by ophthalmologists. In this study, we tested refraction with a hand-held autorefractometer in addition to visual acuity testing and inspection to ...