다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

OUTPU T 29 OUTPU T 30 OUTPU T 31 OUTPU T 32 OUTPU T 25 OUTPU T 26 OUTPU T 27 OUTPU T 28 OUTPU T 21 OUTPU T 22 OUTPU T 23 OUTPU T 24 OUTPU T 17 OUTPU T 18 OUTPU T 19 OUTPU T 20 OUTPU T 13 OUTPU T 14 OUTPU T 15 OUTPU T 16 OUTPU T 9 OUTPU T 10 OUTPU T 11 OUTPU T 12 OUTPU T 5 OUTPU T 6 OUTPU T 7 OUTPU T 8 OUTPU T 1 OUTPU T 2 OUTPU T 3 OUTPU T 4 29 30 31 32 25 26 27 28 21 22 23 24 17 18 19 20 13 14 15 16 9

A User’s Guide

Ozone pollution in China: A review of concentrations, meteorological influences, chemical precursors, and effects

Review of relationship between indoor and outdoor particles: I/O ratio, infiltration factor and penetration factor

Coupling spectral-dependent radiative cooling with building energy simulation

A simplified methodology for the prediction of mean air velocity and particle concentration in isolation rooms with downward ventilation systems

Many airborne infectious diseases can be transmitted via exhaled contaminants transported in the air. Direct exposure occurs when the exhaled jet from the infected person directly enters the breathing zone of the target person. Indirect exposure occurs when the contaminants disperse in the room and are inhaled by the target person. This paper presents a simple method for differentiating the direct and indirect exposure to exhaled contaminants in mechanically ventilated rooms. Experimental data for 191 cases were collected from the literature. After analyzing the data, a simple method was developed to differentiate direct and indirect exposure in mixing and displacement ventilated rooms. The proposed method correctly differentiated direct and indirect exposure for 120 out of the 133 mixing ventilation cases and 47 out of the 58 displacement ventilation cases. Therefore, the proposed method is suitable for use at the early design stage to quickly assess whether there will be direct exposure to exhaled contaminants in a mechanically ventilated room.

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A simple method for differentiating direct and indirect exposure to exhaled contaminants in mechanically ventilated rooms

Please click here to find the Letter to the Editor to which this Response refers: http://dx.doi.org/10.1080/02786826.2010.540048 In response to “Letter to the Editor Lagrangian Stochastic Particle Tracking” by Aliabadi and Rogak in Aerosol Science and Technology 45:313–314, 2011.

Lagrangian Stochastic Particle Tracking: Further Discussion

When the outdoor PM2.5 pollution is severe, if the windows are open, the occupants tend to be exposed to higher indoor PM2.5 of outdoor origin. However, if the windows are closed, the ventilation rate tends to be insufficient for removing air pollutants generated indoors. Opening windows with the use of nanofiber window screens can be an alternative strategy that can balance between indoor PM2.5 of outdoor origin and ventilation rate. This study fabricated a number of nanofiber window screens and conducted a series of experiments in a laboratory setup to measure the PM2.5 removal efficiency and pressure drop with different window opening angles. A simple model was then developed for predicting the pressure drop, and the measured data was used to validate the model. Finally, the measured data and the validated model were used for two application cases. In the natural ventilation case, the use of nanofiber window screens can effectively reduce indoor PM2.5 of outdoor origin, and the ventilation rate can be improved when compared with infiltration in the house. However, the nanofiber window screens could not reduce the PM2.5 level in the kitchen with a range hood when the cooking PM2.5 emission rate was high.

Chun Chen

Papers

Coupling spectral-dependent radiative cooling with building energy simulation

A simplified methodology for the prediction of mean air velocity and particle concentration in isolation rooms with downward ventilation systems

A simple method for differentiating direct and indirect exposure to exhaled contaminants in mechanically ventilated rooms

Lagrangian Stochastic Particle Tracking: Further Discussion

Influence of nanofiber window screens on indoor PM2.5 of outdoor origin and ventilation rate: An experimental and modeling study