The present work is part of a research effort aimed at integrating a detailed model of airflow in large spaces with an algebraic multizone infiltration model to describe pollutant transport and coupled air flows within and between complex buildings and large spaces. In the past 15 years, zonal models were developed with the goal to obtain an approximate prediction of airflow characteristics in ...

OBJECTIVES The purpose of this study was to determine the aerodynamic and acoustic features of speech produced at comfortable, maximal and minimal levels of vocal effort. STUDY DESIGN Prospective, quasi-experimental research design. METHOD Eighteen healthy participants with normal voice were included in this study. After task training, participants produced repeated syllable combinations at...

BACKGROUND Bronchial anthracofibrosis (BAF), which is associated with exposure to biomass smoke in inefficiently ventilated indoor areas, can take the form of obstructive lung disease. Patients with BAF can mimic or present with an exacerbation of chronic obstructive pulmonary disease (COPD). The purpose of the current study was to investigate the prevalence of BAF in Korean patients with COPD ...

A mobile robot with gas sensors commonly denoted as ’electronic nose’ enables some interesting applications including the development of an ’electronic watchman’ that is able to detect and localize odour sources. This paper describes the assembly of a mobile odour sensing system and presents investigations on its practical operation in an indoor environment without a constant airflow1. Lacking ...

This study serves as a basic of the indoor dispersion pollen particles, simulating flow field and discussing behavior particles different diameters in rooms. By comparing vertical velocity components ( w ¯ p $$ {\overline{w}}_{\mathrm{p}} ) mean z-direction component f {w}_{\mathrm{f}} plus terminal settling gravitational V g {V}_{\mathrm{g}} ), differences between values are found to occur mai...

As concerns about the health effects of particulate matter (PM) are growing, controlling indoor PM has become vital for ensuring occupants’ health. Active strategies, such as air purification and high-performance filtering, widely implemented to control PM. However, passive including air-tightness compartmentalization, promising alternatives, demonstrated by recent studies. To enhance implement...

Abstract To study the operation and condensation characteristics of an induction radiant air-conditioning system as a novel that combines ventilation air conditioning, convection indoor terminal device unit were studied. The mass transfer coefficient, temperature, rate analyzed experimentally. time required to achieve steady state thermal environment was collected. results indicated primary air...

At present, laminar airflow (LAF) systems and mixing ventilation (MV) are two commonly used solutions for operating rooms (ORs) to ensure the required indoor air quality. However, recent studies have shown that there is little difference in prevalence of surgical site infection (SSI) LAF MV systems. The objective this study was compare performance an system with ORs at St. Olavs hospital, Norwa...