Cellular coverage in underground transport systems: a case study - the Rio de Janeiro Metropolitan
نویسندگان
چکیده
This paper presents a case study of cellular coverage in an underground transport system, the Rio de Janeiro Metropolitan. The project was developed at WiNGS Telecom and implemented by a pool of companies for Algar Telecomunicações Leste (ATL), the B-band operator in Rio de Janeiro, Brazil. The project characteristics, assumptions made and chosen solutions are described, as well as the propagation models, measurements and link budget examples.
منابع مشابه
Traumatic Habit causing Gingival Recession in a child: 3-Year Follow Up
Introduction: The purpose of this report was to present a successful treatment approach in an unusual gingival recession as a result of finger sucking traumatic habit associated with high labial frenum. Case Report: A 10-year-old girl presented moderate pain, recession in the mandibular right incisor and finger sucking habit. The performed treatment was: oral hygiene instruction, use of palatal...
متن کاملScale to Assess Leaders' Perceptions about their Workers' Digital Addiction
Background: With the evolution of technologies and the mobility factor, new digital devices have emerged, influencing human behavior and provoking diverse dependencies due to their abusive use. Collective environments begin to exhibit the symptoms of such dependencies, compromising people's quality of life (QOL). The objective of the present study was to valida...
متن کاملAttempts to Achieve Millennium Development Goals in a Rural Area of Rio de Janeiro: Deworming and Control of Schistosomiasis
Introduction: According to the World Health Organization (WHO), helminth control could contribute to achieving 7 Millennium Development Goals (MDGs). The present study evaluated the impact of deworming on the infection rate of schistosomiasis in Sumidouro, Brazil and the consequences for the MDGs. Methods: The whole population of this area was invited to ...
متن کاملA fuzzy approach to the evaluation of human factors in ultrasonic nondestructive examinations
Human factors are among the main elements affecting the reliability of nondestructive examinations (NDE). In a man-machine system, human reliability is affected by many factors (performance shaping factors) whose influence on reliability cannot be easily expressed quantitatively. This paper identifies and ranks 59 perform-ance shaping factors by using a fuzzy reasoning method and proposes a pro...
متن کاملIn situ stabilization of polypropylene by lignin using a Ziegler-Natta catalyst
A fourth-generation Ziegler-Natta catalyst was prepared to synthesize polypropylene (PP), which was stabilized by in situpolymerization employing lignin as antioxidant. The antioxidant properties of lignin were compared with those of the commercial antioxidant Irganox 1010. The presence of lignin in the reaction medium slightly decreased the catalytic activity of the reaction. The isotacticity ...
متن کامل