File Edit View Insert Format Styles Table Form Tools Window Help Abc a a a a ab a a a = EE E-E, E E E - E E Default Styl Times NewF 14 2 3 13 14 A15 16 17 L Properties ^ Style Default Style keeping adequate social distance and space ventilation. The distance index Pd can be obtained by theoretical analysis on droplet distribution and transmission from human respiration activities, and the ventilation index Ez represents the system-dependent air distribution efficiency in a space. The study indicated that 1.6–3.0 m (5.2–9.8 ft) is the safe social distance when considering aerosol transmission of exhaled large droplets from talking, while the distance can be up to 8.2 m (26 ft) if taking into account of all droplets under calm air environment. Because of unknown dose response to COVID-19, the model used one actual pandemic case to calibrate the infectious dose (quantum of infection), which was then verified by a number of other existing cases with short exposure time (hours). Projections using the validated model for a variety of scenarios including transportation vehicles and building spaces illustrated that (1) increasing social distance (eg., halving occupancy density) can significantly reduce the infection rate 20–40 %) during the first 30 min even under current ventilation practices; (2) minimum ventilation or fresh air requirement should vary with distancing condition, exposure time, and effectiveness of air distribution systems ^ Character Times New Roman 14 a a a - a a a a C A Paragraph Spacing: Indent: 山言 을 0,00 cr-- E 0,00 cr - * 0,35 cr - E 0,00 cr - https://www.sciencedirect.com/science/article/pji/S2210670720306119 별 0,00 cr-- +
File Edit View Insert Format Styles Table Form Tools Window Help Abc a a a a ab a a a = EE E-E, E E E - E E Default Styl Times NewF 14 2 3 13 14 A15 16 17 L Properties ^ Style Default Style keeping adequate social distance and space ventilation. The distance index Pd can be obtained by theoretical analysis on droplet distribution and transmission from human respiration activities, and the ventilation index Ez represents the system-dependent air distribution efficiency in a space. The study indicated that 1.6–3.0 m (5.2–9.8 ft) is the safe social distance when considering aerosol transmission of exhaled large droplets from talking, while the distance can be up to 8.2 m (26 ft) if taking into account of all droplets under calm air environment. Because of unknown dose response to COVID-19, the model used one actual pandemic case to calibrate the infectious dose (quantum of infection), which was then verified by a number of other existing cases with short exposure time (hours). Projections using the validated model for a variety of scenarios including transportation vehicles and building spaces illustrated that (1) increasing social distance (eg., halving occupancy density) can significantly reduce the infection rate 20–40 %) during the first 30 min even under current ventilation practices; (2) minimum ventilation or fresh air requirement should vary with distancing condition, exposure time, and effectiveness of air distribution systems ^ Character Times New Roman 14 a a a - a a a a C A Paragraph Spacing: Indent: 山言 을 0,00 cr-- E 0,00 cr - * 0,35 cr - E 0,00 cr - https://www.sciencedirect.com/science/article/pji/S2210670720306119 별 0,00 cr-- +
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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![docx - LibreOffice Writer.35 995 ölw Euio5
File Edit View
Insert
Format Styles Table Form
Tools Window Help
Abc
Default Styl
Times New F
a a a a ab ab
14
1
2
3
4
5
7
9
10
11
13
14
15
16
17
| Properties
A Style
Default Style
keeping adequate social distance and space ventilation. The distance
index Pd can be obtained by theoretical analysis on droplet distribution
and transmission from human respiration activities, and the ventilation
index Ez represents the system-dependent air distribution efficiency in a
space. The study indicated that 1.6-3.0 m (5.2–9.8 ft) is the safe social
distance when considering aerosol transmission of exhaled large droplets
from talking, while the distance can be up to 8.2 m (26 ft) if taking into
account of all droplets under calm air environment. Because of unknown
dose response to COVID-19, the model used one actual pandemic case to
calibrate the infectious dose (quantum of infection), which was then
verified by a number of other existing cases with short exposure time
(hours). Projections using the validated model for a variety of scenarios
including transportation vehicles and building spaces illustrated that (1)
increasing social distance (eg., halving occupancy density) can
significantly reduce the infection rate 20-40 %) during the first 30 min
even under current ventilation practices; (2) minimum ventilation or fresh
air requirement should vary with distancing condition, exposure time, and
effectiveness of air distribution systems
A Character
Times New Roman
14
a a a , a a
a a
a
Paragraph
Spacing:
Indent:
1 0,00 cr -
+
E 0,00 cr -
+
7 0,35 cr -
+
a 0,00 cr
bttps://www.sciencedirect.com/science/article/pji/S2210670720306119
e 0,00 cr
+
Page 6 of 16
2,862 words, 20,323 characters
Default Style
English (USA)
95%
]مشروع التخرج العام
مدير الملفات -New
Telegram (105721)
5مشروع سارة کو و وثر35. . . .do
30% D) uo 12:34](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc216676c-2546-4136-a76b-a87a8045de22%2F59088347-46ea-484c-9256-0ecdbe374419%2Fmgwypwu_processed.png&w=3840&q=75)
Transcribed Image Text:docx - LibreOffice Writer.35 995 ölw Euio5
File Edit View
Insert
Format Styles Table Form
Tools Window Help
Abc
Default Styl
Times New F
a a a a ab ab
14
1
2
3
4
5
7
9
10
11
13
14
15
16
17
| Properties
A Style
Default Style
keeping adequate social distance and space ventilation. The distance
index Pd can be obtained by theoretical analysis on droplet distribution
and transmission from human respiration activities, and the ventilation
index Ez represents the system-dependent air distribution efficiency in a
space. The study indicated that 1.6-3.0 m (5.2–9.8 ft) is the safe social
distance when considering aerosol transmission of exhaled large droplets
from talking, while the distance can be up to 8.2 m (26 ft) if taking into
account of all droplets under calm air environment. Because of unknown
dose response to COVID-19, the model used one actual pandemic case to
calibrate the infectious dose (quantum of infection), which was then
verified by a number of other existing cases with short exposure time
(hours). Projections using the validated model for a variety of scenarios
including transportation vehicles and building spaces illustrated that (1)
increasing social distance (eg., halving occupancy density) can
significantly reduce the infection rate 20-40 %) during the first 30 min
even under current ventilation practices; (2) minimum ventilation or fresh
air requirement should vary with distancing condition, exposure time, and
effectiveness of air distribution systems
A Character
Times New Roman
14
a a a , a a
a a
a
Paragraph
Spacing:
Indent:
1 0,00 cr -
+
E 0,00 cr -
+
7 0,35 cr -
+
a 0,00 cr
bttps://www.sciencedirect.com/science/article/pji/S2210670720306119
e 0,00 cr
+
Page 6 of 16
2,862 words, 20,323 characters
Default Style
English (USA)
95%
]مشروع التخرج العام
مدير الملفات -New
Telegram (105721)
5مشروع سارة کو و وثر35. . . .do
30% D) uo 12:34
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