Challenges and Opportunities in Operating a High-Altitude Site

2006 ◽  
pp. 97-109
Author(s):  
Robert E. Stencel
Keyword(s):  
High Altitude ◽  
Challenges And Opportunities

scholarly journals High Altitude Hospitality

2017 ◽  
Vol 7 ◽  
pp. 62-82 ◽  
Author(s):  
Basant Prasad Joshi
Keyword(s):  
Human Factors ◽  
High Altitude ◽  
Significant Contribution ◽  
Rock Climbing ◽  
High Altitudes ◽  
Direct Bearing ◽  
Challenges And Opportunities ◽  
Hospitality And Tourism ◽  
Physical Elements ◽  
Tourism And Hospitality

Most of the books and journals of hospitality and tourism, generally talk about history, trends and components of hospitality as a newly emerging discipline but there are a few books could only make significant contribution on the prospects, challenges and opportunities for hospitality especially in high altitudes where the challenges are ample. People would basically be interested to travel to altitudes to crave the places of adventures specially trekking, hiking, mountaineering, rock climbing, snow skiing, etc. Providing hospitality in high altitudes is a very perplexing task where there is always a scarcity of man, material and management. Hochschild (2003) in his book The Managed Heart explains about the human factors that are important in providing hospitality services. The importance of feelings and its belongings on the offered services to the client and guests has a direct bearing on the overall experience and this experience is much important in high altitudes where the sentimental values are more important than the physical elements of a good service.Journal of Tourism and Hospitality EducationVol. 7, 2017, page : 62-82

scholarly journals Cloud-Enabled High-Altitude Platform Systems: Challenges and Opportunities

2021 ◽  
Vol 2 ◽  
Author(s):  
Khaleel Mershad ◽  
Hayssam Dahrouj ◽  
Hadi Sarieddeen ◽  
Basem Shihada ◽  
Tareq Al-Naffouri ◽  
...  
Keyword(s):  
High Altitude ◽  
Ad Hoc ◽  
Ground Level ◽  
High Energy ◽  
Cloud Services ◽  
Base Stations ◽  
High Altitude Platform ◽  
Wide Range ◽  
Challenges And Opportunities ◽  
Hoc Networks

Augmenting ground-level communications with flying networks, such as the high-altitude platform system (HAPS), is among the major innovative initiatives of the next generation of wireless systems (6G). Given HAPS quasi-static positioning at the stratosphere, HAPS-to-ground and HAPS-to-air connectivity frameworks are expected to be prolific in terms of data acquisition and computing, especially given the mild weather and quasi-constant wind speed characteristics of the stratospheric layer. This paper explores the opportunities stemming from the realization of cloud-enabled HAPS in the context of telecommunications applications and services. The paper first advocates for the potential physical advantages of deploying HAPS as flying data-centers, also known as super-macro base stations. The paper then describes various cloud services that can be offered from the HAPS and the merits that can be achieved by this integration, such as enhancing the quality, speed, and range of the offered services. The proposed services span a wide range of fields, including satellites, Internet of Things (IoT), ad hoc networks (such as sensor; vehicular; and aerial networks), gaming, and social networks. For each service, the paper illustrates the methods that would be used by cloud providers to offload the service data to the HAPS and enable the cloud customers to consume the service. The paper further sheds light on the challenges that need to be addressed for realizing practical cloud-enabled HAPS, mainly, those related to high energy, processing power, quality of service (QoS), and security considerations. Finally, the paper discusses some open issues on the topic, namely, HAPS mobility and message routing, HAPS security via blockchain and machine learning, artificial intelligence-based resource allocation in cloud-enabled HAPS, and integration with vertical heterogeneous networks.

Contrast of Filament Bright Rims

1994 ◽  
Vol 144 ◽  
pp. 365-367
Author(s):  
E. V. Kononovich ◽  
O. B. Smirnova ◽  
P. Heinzel ◽  
P. Kotrč
Keyword(s):  
High Altitude ◽  
Line Profile ◽  
Line Center ◽  
Magnetic Structures ◽  
The Mean

AbstractThe Hα filtergrams obtained at Tjan-Shan High Altitude Observatory near Alma-Ata (Moscow University Station) were measured in order to specify the bright rims contrast at different points along the line profile (0.0; ± 0.25; ± 0.5; ± 0.75 and ± 1.0 Å). The mean contrast value in the line center is about 25 percent. The bright rims interpretation as the bases of magnetic structures supporting the filaments is suggested.

Clean Electron Microscope Substrate Films Used for Micrometeorite Collection and Study

1967 ◽  
Vol 25 ◽  
pp. 366-367
Author(s):  
D. M. Davies ◽  
R. Kemner ◽  
E. F. Fullam
Keyword(s):  
Thin Film ◽  
Electron Microscope ◽  
High Altitude ◽  
Amyl Acetate ◽  
Temperature Variations ◽  
Film Forming ◽  
Film Specimen ◽  
Particulate Contaminants

All serious electron microscopists at one time or another have been concerned with the cleanliness and freedom from artifacts of thin film specimen support substrates. This is particularly important where there are relatively few particles of a sample to be found for study, as in the case of micrometeorite collections. For the deposition of such celestial garbage through the use of balloons, rockets, and aircraft, the thin film substrates must have not only all the attributes necessary for use in the electron microscope, but also be able to withstand rather wide temperature variations at high altitude, vibration and shock inherent in the collection vehicle's operation and occasionally an unscheduled violent landing.Nitrocellulose has been selected as a film forming material that meets these requirements yet lends itself to a relatively simple clean-up procedure to remove particulate contaminants. A 1% nitrocellulose solution is prepared by dissolving “Parlodion” in redistilled amyl acetate from which all moisture has been removed.

Continuous hydrogenolysis of acetal-stabilized lignin in flow

2021 ◽  
Author(s):  
Wu Lan ◽  
Yuan Peng Du ◽  
Songlan Sun ◽  
Jean Behaghel de Bueren ◽  
Florent Héroguel ◽  
...  
Keyword(s):  
Steady State ◽  
Challenges And Opportunities

We performed a steady state high-yielding depolymerization of soluble acetal-stabilized lignin in flow, which offered a window into challenges and opportunities that will be faced when continuously processing this feedstock.

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