Digital tuning systems are fast replacing the conventional mechanical systems in AM/FM and television receivers. The desirability of the digital approach is mainly due to the following features: Y Precise tuning of station frequencies Y Exact digital frequency display Y Keyboard entry of desired frequency Y Virtually unlimited station memory Y Up/down scanning through the band Y Station ‘‘searc...

In this paper, we investigate a gasoline station’s incentive to price-discriminate by selling full-service gasoline as well as self-service gasoline. Unlike previous research, we explicitly model a firm’s incentive to price discriminate by choosing to be either single-product or multi-product as a function of market and station characteristics. Using cross-sectional survey data on prices, stati...

Communication with Low-Earth Orbit (LEO) satellites requires the set up of a ground station which is a complex and costly installation. Moreover, a LEO satellite is accessible only during certain time slots from a given ground station. In other words, access to LEO satellites is on an intermittent basis and is constrained by the availability of ground stations. The work presented in this paper ...

This paper evaluates the effectiveness of reducing scheduled station dwell time to save energy on commuter rail lines. Most commuter rail schedules include a fixed amount of dwell time (e.g. 30-seconds) at each station. For stations with higher demand the station dwell time may be up to 1 minute. Generally the station dwell time is set high enough to meet peak period passenger boarding/alightin...

Since October 1, 1950, hydrologic-station records in USGS reports have been listed in order of downstream direction along the main stream. All stations on a tributary entering upstream from a mainstream station are listed before that station. A station on a tributary entering between two mainstream stations is listed between those stations. A similar order is followed in listing stations on fir...

A feeding station is the area of forage a grazing animal can reach without moving its forefeet. Grazing behavior can be divided into residence within feeding stations (with bites as benefits) and movement between feeding stations (with steps as costs). However, relatively little information has been reported on how grazing animals modify their feeding station behavior seasonally and interannual...

  in order to measure the conentration of lead in air of six Kerman gasoline stations,10 air samples were collected from each between 8:30-12:30 a.m. and then analyzed .lead conentration was  determined by atomic absorption spectrometers.the maximum and minimum of lead conentration were 0.833mg/m3 and 0.41mg/m3 in Khorshid and shahab gasoline stations,respectively.all of the samples were compa...

Network deployment problem is one of the major issues when base stations and relay stations are jointly deployed. Deploying relay station at suitable position covers throughput enhancement and coverage extension problem in IEEE 802.16j MMR networks. In this paper we have proposed a new adaptive model for throughput enhancement and optimal relay selection in IEEE 802.16j MMR networks and studied...