Indoor Environment
Mostrando 1-12 de 64 artigos, teses e dissertações.
-
1. IEEE 802.11b/g Practical Assessment Using a Low-Cost Quasi-Yagi Rectenna for Indoor RF Energy Harvesting
Abstract This article presents an experimental analysis of the use of signals transmitted by Wireless Local Area Networks (WLAN) based on the IEEE 802.11b/g standards for Radio Frequency Energy Harvesting (RFEH) applications in indoor environments employing a Quasi-Yagi Rectenna (QYR) topology. This analysis is a crucial point to distinguish the use of the I
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-03
-
2. LANDMARKS EVALUATION WITH USE OF QR-CODE FOR POSITIONING INDOOR ENVIRONMENT
Abstract: People tend to lose their sense of direction in closed environments and the role of indoor maps is to assist the user in navigating in these spaces, through understanding the environment, identifying reference points or positioning. Among the several forms of achieving positioning in indoor environments, this research used the method based on image
Bol. Ciênc. Geod.. Publicado em: 02/12/2019
-
3. HYSTERESIS AND THERMAL INERTIA OF SPHERES OF ALTERNATIVE MATERIALS FOR BLACK GLOBE THERMOMETERS
ABSTRACT This research was conducted with the objective of evaluating the thermal inertia and hysteresis of the following materials in a wind tunnel: hollow copper sphere with 150.0 mm diameter used as standard in globe thermometers, hollow brass sphere with 75.0 mm diameter, and two hollow plastic spheres with 115.5 and 69.7 mm diameter. The results showed
Eng. Agríc.. Publicado em: 04/11/2019
-
4. Influence of Vegetation on the Outdoor-to-Indoor Mobile Radio Propagation in 700 MHz Band
Abstract Starting from outdoor transmission, crossing vegetation, the wideband and narrowband characterization of the indoor mobile radio channel in the 700 MHz band is obtained from experiments carried out in the indoor environment of the Engineering building at Fluminense Federal University, and from the processed data, respectively, the power-delay profil
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 12/09/2019
-
5. Indoor Air Quality in the Hospital: The Influence of Heating, Ventilating and Conditioning Systems
Abstract Clean, fresh air is the most important requirement for good indoor air quality (IAQ) in all buildings, but it is especially important with regard to the environments within hospitals and other healthcare facilities. The literature indicates that buildings with heating, ventilating and air conditioning (HVAC) systems may have an increased risk of sic
Braz. arch. biol. technol.. Publicado em: 05/09/2019
-
6. Araucaria angustifolia Budding Techniques in Indoor and Outdoor Stablished Rootstocks
ABSTRACT The objective of this work was to evaluate the technical feasibility of budding in A. angustifolia in two rootstocks establishment, performed in two seasons of the year. In October and April, patch and flute budding techniques were carried on rootstocks kept indoor (greenhouse) and established outdoor (field), with grafts of adult female plants. The
Floresta Ambient.. Publicado em: 30/05/2019
-
7. Thermal environment of masonry-walled poultry house in the initial life stage of broilers
RESUMO Objetivou-se com esta pesquisa monitorar e avaliar o ambiente térmico e realizar o mapeamento térmico completo das variáveis temperatura do ar, umidade relativa do ar e índice de temperatura e umidade de aviário para frangos de corte. A pesquisa foi conduzida durante inverno, no Brasil, em aviário comercial, com fechamento completo em alvenaria
Rev. bras. eng. agríc. ambient.. Publicado em: 2019-03
-
8. Cement plate slab production with the incorporation of glass wool waste ground
Abstract One of the characteristics of Civil Construction is its ability to absorb a wide range of wastes to produce new products. Therefore, the objective of this study was to evaluate the behavior of cement plates produced with the addition of ground glass wool waste and in natura, in shredded form. The tensile strength tests in bending and permeability we
REM, Int. Eng. J.. Publicado em: 2018-03
-
9. Mobile Augmented Reality enhances indoor navigation for wheelchair users
Introduction: Individuals with mobility impairments associated with lower limb disabilities often face enormous challenges to participate in routine activities and to move around various environments. For many, the use of wheelchairs is paramount to provide mobility and social inclusion. Nevertheless, they still face a number of challenges to properly functi
Res. Biomed. Eng.. Publicado em: 24/05/2016
-
10. Numerical study of the influence of internal heat source in naturally ventilated offices
Abstract The natural ventilation in a building performs a fundamental role in users' welfare and health, when used as a bioclimatic and architectural strategy, it can provide brighter projects. Increasing the indoor air speed ventilation has an important performance maintaining indoor air quality, contributing to thermal interactions between human body and e
Rem: Rev. Esc. Minas. Publicado em: 2016-03
-
11. Ambient Noise in Emergency Rooms and Its Health Hazards
Introduction The occupational risk due to high levels of noise in the hospital environment has been recognized, and the National Agency of Sanitary Surveillance of the Ministry of Health recommends evaluation and control of noise in hospital areas.
Objectives To assess the sound environment in the emergen
Int. Arch. Otorhinolaryngol.. Publicado em: 2015
-
12. An efficient indoor ray-tracing propagation model with a quasi-3D approach
This paper presents an indoor propagation model that uses image-based ray-tracing with a quasi-3D approach. A fast 2D algorithm finds the most relevant rays lying in the horizontal plan of the indoor environment. Then, every path is converted into five rays that lie in the vertical plane. As a consequence, the third-dimension effect is considered in the fiel
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2014-12