This paper analyzes the performance of a base station layout for a UMTS network in a densely populated city. The study is carried out using snapshot simulations of an actual city (Barcelona, Spain) with specific traffic and propagation profiles. A first layout is proposed in order to guarantee good coverage with a minimum number of base stations. This layout is approached taking into account th...

TETRA outdoor large-scale received signal prediction model is presented here. The model follows log-distance model. It is derived based on received signal strength survey measurements of a TETRA system, operating in the 300-400 MHz band, in Riyadh city. The model is aimed to assist practicing engineers in the estimation of received power, or electric field strength as well as path-loss at any g...

Panel data in many econometric applications exhibit a nested (hierarchical) structure. For example, data on "rms may be grouped by industry, or data on air pollution may be grouped by observation station within a city, city within a country, and by country. In these cases, one can control for unobserved group and sub-group e!ects using a nested-error component model. A double-nested unbalanced ...

Two radon measurement stations located to the north and south of a NORM (Naturally Occurring Radioactive Materials) repository phosphogypsum (southwest Europe) were used monitor behavior during 2018. The are at opposing sides repository, one in Huelva City other rural area south. This setup aimed identify influence on each station use levels as marker atmospheric transport local area. To achiev...

In coarse-textured soils and gravel pads found in cold regions, hydrocarbon contaminants often migrate into environmentally sensitive areas faster than the rate of in-situ bioremediation. Permeable Reactive Barrier (PRB) technology offers the potential to slow the rate of dispersal and allow remediation over a longer timeframe. Additionally, the reactive media in PRBs can deliver nutrients need...

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HDDT breast-y 286 9 2 2.36 HDDT compustat 13657 20 2 25.26 HDDT covtype 38500 10 2 13.02 HDDT credit-g 1000 20 2 2.33 HDDT estate 5322 12 2 7.37 HDDT german-numer 1000 24 2 2.33 HDDT heart-v 200 13 2 2.92 HDDT hypo 3163 25 2 19.95 HDDT ism 11180 6 2 42.00 HDDT letter 20000 16 2 24.35 HDDT oil 937 49 2 21.85 HDDT page 5473 10 2 8.77 HDDT pendigits 10992 16 2 8.63 HDDT phoneme 5404 5 2 2.41 HDDT ...

One of the reasons for construction Trans Sumatra toll road is increase in traffic Bandar Lampung. Travel time and distance to three can affect land prices. The purpose this study obtain effect gates on This uses 11,904 travel data from Google Maps with details 124 villages roads 8 weeks, one week there are 2 weekdays weekends. point used represent Lampung obtained midpoint kelurahan. method ge...