Results 131 to 140 of about 1,030,202 (307)

The Economic Effect of Competition in the Air Transportation Industry [PDF]

open access: yes, 1972
The air transportation industry has been described as a highly-competitive, regulated oligopoly or as a price-regulated cartel with blocked entry, resulting in excessive service and low load factors.
Hubbard, H. B.
core   +1 more source

Interaction between Molten Al‐Killed Mn–B Steel and Carbon‐Bonded MgO Refractories Based on Recyclates

open access: yesAdvanced Engineering Materials, EarlyView.
High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé   +5 more
wiley   +1 more source

COVID-19 pandemic and air transportation: Successfully navigating the paper hurricane. [PDF]

open access: yesJ Air Transp Manag, 2021
Sun X, Wandelt S, Zheng C, Zhang A.
europepmc   +1 more source

Investigation of Air Transportation Technology at Princeton University, 1989-1990 [PDF]

open access: yes, 1990
The Air Transportation Technology Program at Princeton University proceeded along six avenues during the past year: microburst hazards to aircraft; machine-intelligent, fault tolerant flight control; computer aided heuristics for piloted flight ...
Stengel, Robert F.
core   +1 more source

Influence of Sample Preparation and Processing Procedures on the Thermal Diffusivity of MgO‐C Refractories

open access: yesAdvanced Engineering Materials, EarlyView.
The thermal diffusivity of MgO‐C refractories is highly sensitive to sample preparation and processing procedures. In this article, the effects of coking sequence, machining conditions, structural inhomogeneity, and graphite coating application on measurements using laser flash apparatus are systematically investigated.
Luyao Pan   +4 more
wiley   +1 more source

Contrails and Their Dependence on Meteorological Situations

open access: yesApplied Sciences
Contrails created by aircraft are a very hot topic today because they contribute to the warming of the atmosphere. Air traffic density is very high, and current forecasts predict a further significant increase.
Iveta Kameníková   +2 more
doaj   +1 more source

Spatial analysis of air passengers with respect to population and employment [PDF]

open access: yes
The relationship between air transportation and urbanization at the national scale is investigated in order to illustrate its role in the post-war evolution of the Turkish urban system. Theory suggests that major transportation innovations have exhibited
Irmak Betul Cakir, Vedia Dokmeci
core  

Chapter 4 - Transportation: Water, Road, and Air, pp. 91-114 [PDF]

open access: yes, 1944
The Catherwood Library and ILR School at Cornell are pleased to again make available an extremely important index of major labor union publications, long out of print. It is Lloyd G. Reynolds and Charles C.
Killingsworth, Charles C   +1 more
core   +1 more source

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