نتایج جستجو برای: airflow

تعداد نتایج: 8579  

2006
William M. Hartmann Eira T. Seppälä Ole Kirkeby Asta Kärkkäinen

This study explores how paint affects the specific airflow resistance and visual appearance of nonwoven scrims used on acoustical ceiling tile. Nine different scrims are included. Each scrim is finished with two application rates of paint. The specific airflow resistance is measured by the ASTM C522 method. The painted samples are also scanned and the images processed by ImagePro software to ch...

2006
Jelena Srebric Qingyan Chen Leon R. Glicksman

Design of a thermally comfortable indoor environment requires detailed information about distribution of air velocity, air temperature, relative humidity, and mean radiant temperature and about heating/cooling load in a space. This research has developed a coupled airflow-and-energy simulation program to calculate simultaneously the distributions of indoor airflow and thermal comfort and heatin...

2004
Arlo Faria

This is a study to investigate the parameters of the glottal source signal that are evidenced by three kinds of signals: an electroglottographic (EGG) signal, an acoustic signal, and an oral airflow signal. The glottal pulse waveform, whether intrinsically defined as glotal airflow or area, can be parameterized with attributes that vary across speakers and types of phonation. Some of these para...

2014
Shaji D. Skaria Gerald C. Smaldone

BACKGROUND Potentially infected individuals ('source') are sometimes encouraged to use face masks to reduce exposure of their infectious aerosols to others ('receiver'). To improve compliance with Respiratory Source Control via face mask and therefore reduce receiver exposure, a mask should be comfortable and effective. We tested a novel face mask designed to improve breathability and filtratio...

Journal: :JAMA facial plastic surgery 2014
Scott Shadfar William W Shockley Gita M Fleischman Anand R Dugar Kibwei A McKinney Dennis O Frank-Ito Julia S Kimbell

IMPORTANCE Collapse or compromise of the internal nasal valve (INV) results in symptomatic nasal obstruction; thus, various surgical maneuvers are designed to support the INV. OBJECTIVE To determine the effect on nasal airflow after various surgical techniques focused at the level of the INV and lateral nasal sidewall. DESIGN AND SETTING A fresh cadaver head was obtained and underwent sutur...

2003
S. Wang J. M. Deltour

Airflow distribution in the greenhouse windows is important for us to understand the mechanism of natural ventilation and thus is helpful for designers to have the optimal ventilation system. The full-scale measurements of the airflow in a large Venlo-type greenhouse were carried out by use of an ultrasonic anemometer. The clear airflow patterns around the greenhouse under leeside ventilation w...

2010
L. James Lo Atila Novoselac

Conditioning and ventilating open office spaces requires innovations as new buildings aim to be more intelligent, energy efficient and healthy. This paper explores the possibility of using a localized airflow to divide an open cubicle office into zones without partition walls. Computational fluid dynamics (CFD) model was used to simulate localized airflow in a cubicle office and both the energy...

2006
Gideon Kowadlo R. Andrew Russell

Previous work on odour localisation in enclosed environments, relying on an airflow model, has faced significant limitations due to the fact that large differences between airflow topologies are predicted for only small variations in a physical map. This is due to uncertainties in the map and approximations in the modelling process. Furthermore, there are uncertainties regarding the flow direct...

2015
Hyunsoon Kim Shinji Maeda Kiyoshi Honda

This paper is concerned with glottal opening in the Korean lenis (/p t k/), aspirated (/p t k/) and fortis (/p’ t’ k’/) plosives, using a new non-invasive technique called external lighting and sensing photoglottograph (ePGG) as well as airflow and acoustic data. From the simultaneous recording of ePGG, airflow and acoustic data, we have investigated (a) the timing relations among glottal openi...

2012
Georgia Zellou

This aerodynamic study investigates velum activity during the production of nasal and pharyngeal consonants, using airflow, and during the production of vowels adjacent to nasal and pharyngeal consonants, using airflow and nasalance, in Moroccan Arabic (MA). The results indicate that the velum is lowered during the production of pharyngeals and that this overlaps on adjacent vowels. However, na...

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