scholarly journals Airbus' Cabin Air Explanations during the Corona Pandemic – Presented, Analyzed, and Criticized

2021 ◽  
Author(s):  
Dieter Scholz
Keyword(s):  
Health Risk ◽  
Cross Section ◽  
Aviation Industry ◽  
Technical Expertise ◽  
Chief Engineer ◽  
Change Rate ◽  
The Public ◽  
Air Change Rate ◽  
Written Form ◽  
Passenger Aircraft

The technical expertise of the aircraft manufacturer on cabin air in passenger aircraft during the Corona pandemic is paramount. Not much of it is out in the public domain. The little information found, is presented here, analyzed, and criticized. Airbus is using the same arguments in support of flying during times of COVID-19 as other stakeholders in the aviation industry. The three facts: high air change rate, use of HEPA filters, and a ventilation concept for each cross section along the length of the fuselage justifies for Airbus to wave otherwise accepted commandments about social distancing. Every possible argument is used to play down the health risk from SARS-CoV-2 for the sake of inviting passengers back into the aircraft. The wealth of arguments can be found in an interview with Airbus chief engineer Jean-Brice Dumont. This memo presents some of the arguments from the video in written form.

Operational Research and Aviation Management

1965 ◽  
Vol 69 (656) ◽  
pp. 543-552 ◽  
Author(s):  
R. R. P. Jackson ◽  
P. A. Loncton
Keyword(s):  
Operational Research ◽  
Crew Scheduling ◽  
Aviation Industry ◽  
Chief Engineer ◽  
The Public ◽  
Aviation Management ◽  
British Commonwealth ◽  
Day By Day ◽  
The Way

It is a sign of the present needs of the aviation industry that the Twentieth British Commonwealth Lecture, delivered by Mr. J. T. Dyment, Chief Engineer of Air Canada, was devoted to “Tools of Airline Management”.In his lecture, Mr. Dyment pointed out that competition is too keen to permit Management to continue with methods satisfactory five or ten years ago and he reviewed some typical modern tools of Management. He mentioned a wide variety of tools both for the day-by-day control of airline activities, such as crew scheduling and for such strategic problems as the nurturing of the company image presented to the public. He paid especial attention to the way in which operational research in Air Canada has been able to assist Management in raising the efficiency of the airline.

scholarly journals The Metamorphosis of Written Devotion in the Age of Vatican II (c. 1948–c. 1998) in Hungary—Guestbooks in Hungarian Marian Shrines

Religions ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 235
Author(s):  
Krisztina Frauhammer
Keyword(s):  
20Th Century ◽  
Vatican Ii ◽  
Virgin Mary ◽  
Combined Effect ◽  
Public Realm ◽  
The Public ◽  
Written Form ◽  
Personal Prayer ◽  
The Church

This article presents the Hungarian manifestations of a written devotional practice that emerged in the second half of the 20th century worldwide: the rite of writing prayers in guestbooks or visitors’ books and spontaneously leaving prayer slips in shrines. Guestbooks or visitors’ books, a practice well known in museums and exhibitions, have appeared in Hungarian shrines for pilgrims to record requests, prayers, and declarations of gratitude. This is an unusual use of guestbooks, as, unlike regular guestbook entries, they contain personal prayers, which are surprisingly honest and self-reflective. Another curiosity of the books and slips is that anybody can see and read them, because they are on display in the shrines, mostly close to the statue of Virgin Mary. They allow the researcher to observe a special communication situation, the written representation of an informal, non-formalised, personal prayer. Of course, this is not unknown in the practice of prayer; what is new here is that it takes place in the public realm of a shrine, in written form. This paper seeks answers to the question of what genre antecedents, what patterns of behaviour, and which religious practices have led to the development of this recent practice of devotion in the examined period in Hungarian Catholic shrines. In connection with this issue, this paper would like to draw attention to the combined effect of the following three factors: the continuity of traditions, the emergence of innovative elements and the role of the church as an institution. Their parallel interactions help us to understand the guestbooks of the shrines.

scholarly journals Comparison of Downdraught and Up Draft Passive Air Conduction Systems (PACS) in a Winery Building

Buildings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 259
Author(s):  
Ádám László Katona ◽  
István Ervin Háber ◽  
István Kistelegdi
Keyword(s):  
Air Conditioning ◽  
Natural Ventilation ◽  
Dynamics Simulation ◽  
Computational Fluid Dynamics Simulation ◽  
General Applicability ◽  
Change Rate ◽  
Air Change Rate ◽  
Simulation Based ◽  
Ventilation Performance ◽  
Air Conduction

A huge portion of energy consumption in buildings comes from heating, ventilation, and air conditioning. Numerous previous works assessed the potential of natural ventilation compared to mechanical ventilation and proved their justification on the field. Nevertheless, it is a major difficulty to collect enough information from the literature to make decisions between different natural ventilation solutions with a given situation and boundary conditions. The current study tests the passive air conduction system (PACS) variations in the design phase of a medium-sized new winery’s cellar and production hall in Villány, Hungary. A computational fluid dynamics simulation based comparative analysis enabled to determine the differences in updraft (UD) and downdraught (DD) PACS, whereby the latter was found to be more efficient. While the DD PACS performed an air change range of 1.02 h−1 to 5.98 h−1, the UD PACS delivered −0.25 h−1 to 12.82 h−1 air change rate. The ventilation performance of the DD version possessed lower amplitudes, but the distribution was more balanced under different wind incident angles, thus this version was chosen for construction. It could be concluded that the DD PACS provides a more general applicability for natural ventilation in moderate climates and in small to medium scale industry hall domains with one in- and one outlet.

scholarly journals Unions and Productivity in the Public Sector: A Study of Municipal Libraries

ILR Review ◽  
1983 ◽  
Vol 36 (2) ◽  
pp. 199-213 ◽  
Author(s):  
Ronald G. Ehrenberg ◽  
Daniel R. Sherman ◽  
Joshua L. Schwarz
Keyword(s):  
Public Sector ◽  
Collective Bargaining ◽  
Empirical Analysis ◽  
Cross Section ◽  
Cross Section Data ◽  
The Public ◽  
Section Data ◽  
The Empirical Analysis

This paper develops and illustrates the use of two methodologies to analyze the effect of unions on productivity in the public sector. Although the methodologies are applicable to a wide variety of public sector functions, the focus of the paper is on municipal libraries because of the availability of relevant data. The empirical analysis, which uses 1977 cross-section data on 260 libraries, suggests that collective bargaining coverage has not significantly affected productivity in municipal libraries.

scholarly journals Estimation of a room ventilation air change rate using a stochastic grey-box modelling approach

Measurement ◽  
2018 ◽  
Vol 124 ◽  
pp. 539-548 ◽  
Author(s):  
Marcel Macarulla ◽  
Miquel Casals ◽  
Núria Forcada ◽  
Marta Gangolells ◽  
Alberto Giretti
Keyword(s):  
Change Rate ◽  
Room Ventilation ◽  
Air Change Rate ◽  
Modelling Approach
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