Results 111 to 120 of about 4,434 (254)

Theoretical Foundations of Remote Sensing for Glacier Assessment and Mapping

, 2014
The international scientific community is actively engaged in assessing ice sheet and alpine glacier fluctuations at a variety of scales. The availability of stereoscopic, multitemporal, and multispectral satellite imagery from the optical wavelength ...
Shroder, John F., Jr., Andrew B. G. Bush, Bush, Andrew B. G., Michael P. Bishop, John F. Shroder, Shroder, John F., Haritashya, Umesh K., Dorothy K. Hall, Alan R. Gillespie, Bishop, Michael P., Furfaro, Roberto, Hall, Dorothy K., Roberto Furfaro, Umesh K. Haritashya, Gillespie, Alan R.   +14 more
core   +1 more source

Titanium‐Catalyzed Diastereoselective Keto‐ and Iminonitrile Cyclizations

Chemistry – A European Journal, EarlyView.
The titanium(III)‐catalyzed diastereoselective cyclization of readily‐available substituted ketonitriles gives cyclopentanones in good yield and stereoselectivity. Subsequent 1,2‐addition allows the preparation of cyclopentyls with three consecutive stereocenters.
Christoph Kern, Ritu Singh, Michael A. Unkrig‐Bau, Lukas Jakob, Jan Streuff   +4 more
wiley   +1 more source

Synthesis and characterization of amphiphilic nitroxide 1,1,3,3–tetraethylisoindoline–2–oxyl–5–sodium sulfonate (TEIOSNa)

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract The synthesis and characterization of an amphiphilic nitroxide to be used as a controlling agent in a nitroxide‐mediated living radical polymerization in aqueous dispersion media is presented. In the first stage of nitroxide synthesis (phthalimide protection), two reaction methods were employed: traditional and microwave.
Enrique García‐Leal, Martha Eugenia Albores Velasco, René O. Vargas, Rubén Mil‐Martínez   +3 more
wiley   +1 more source

Synthesis and characterization of a highly hydrophilic nanocomposite for wettability alteration, water/oil interfacial tension reduction, and enhanced oil recovery

The Canadian Journal of Chemical Engineering, EarlyView.
Mechanism of wettability alteration, interfacial tension reduction, and oil recovery by novel nanocomposite. Abstract The development of stable nanofluids (NFs) for enhanced oil recovery (EOR) relies on optimizing interactions between reservoir rocks and fluids.
Ehsan Jafarbeigi, Ehsan Kamari, Amir H. Mohammadi   +2 more
wiley   +1 more source

An enhanced index for debris-covered glacier boundary extraction, with emphasis on low-activity glaciers, using time-series SAR imagery

International Journal of Digital Earth
Accurate delineation of glacier boundaries is essential for monitoring glacier changes. Debris-covered glaciers often resemble the textures of their surrounding terrain, making boundary extraction especially challenging.
Yue Shi, Bo Zhang, Can Yang, Yongsheng Yin, Yin Fu, Jiao Wang, Qiao Liu, Xiaowen Wang   +7 more
doaj   +1 more source

Mapping Glacier Bay National Park, Alaska

, 2010
Making a National Park Service (NPS) visitor map of a large, famous park such as Glacier Bay involves careful planning and many people. Preliminary work on the Glacier Bay map required a site visit to Alaska, consultations with park staff, and observing ...
Patterson, Tom
core   +1 more source

Clathrate hydrate crystallization

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Clathrate hydrate crystallization has been an area of interest to chemical engineers from the point of view of crystal structure, thermophysical properties, phase equilibria, kinetics, industrial applications, and environmental (climate change) implications.
Peter Englezos
wiley   +1 more source

DL4GAM: A Multi‐Modal Deep Learning‐Based Framework for Glacier Area Monitoring, Trained and Validated on the European Alps

Earth and Space Science
Glaciers play a critical role in our society, impacting everything from sea‐level rise and access to clean water to the tourism industry. Their accelerated melt represents a key indicator of the changing climate, highlighting the need for efficient ...
Codruț‐Andrei Diaconu, Harry Zekollari, Jonathan L. Bamber   +2 more
doaj   +1 more source

Review of SAR imaging geodesy for glacier velocity monitoring

Geodesy and Geodynamics
The surface velocity is one of the most important characteristics of glaciers. Monitoring and mapping glacier movements are of great significance for the studies of sea-level rise, glacier mass balance and dynamics, global warming, and the management of ...
Meiling Wen, Teng Wang
doaj   +1 more source

CARTOGRAPHIC REPRESENTATION AND SYMBOLIZATION IN GLACIER MAPPING

, 1966
In glacier cartography, as in all mapping, questions of convention and standardization have long plagued cartographers. National and international efforts at standardization have generally failed.
Melvin G. Marcus, Karen J. Ewing
core   +1 more source