scholarly journals El grabado del garoé en la colección de viajes de la firma de Bry (1590-1634

2021 ◽  
pp. 65-84
Author(s):  
José Barrios García ◽  
Keyword(s):  
Great Difficulty ◽  
El Hierro ◽  
Water Tree

The Garoé or water tree on the island of El Hierro has been represented graphically on numerous occasions. Particularly important is the copper engraving published in the famous travel collection begun by Theodor de Bry in 1590, however, the great difficulty of tracing its different editions and variants has led to various errors and imprecisions in the literature. To clarify the situation, in this work I identify the two plates of the engraving used in the collection and determine up to nine plates produced by the firm from these two plates.

Comparative Microstructures of Ion Milled and Electrochemically Thinned Composite Materials

1974 ◽  
Vol 32 ◽  
pp. 546-547
Author(s):  
R.R. Russell
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Composite Materials ◽  
Great Difficulty ◽  
Ion Milling ◽  
Transmission Electron ◽  
Ion Damage ◽  
Intermetallic Composite

Transmission electron microscopy of metallic/intermetallic composite materials is most challenging since the microscopist typically has great difficulty preparing specimens with uniform electron thin areas in adjacent phases. The application of ion milling for thinning foils from such materials has been quite effective. Although composite specimens prepared by ion milling have yielded much microstructural information, this technique has some inherent drawbacks such as the possible generation of ion damage near sample surfaces.

Features of Christian-Theological Interpretation of the Concept of Personality

2007 ◽  
pp. 76-85
Author(s):  
Yuliya Kostantynivna Nedzelska
Keyword(s):  
Great Difficulty ◽  
Theological Interpretation ◽  
Early Christian ◽  
The Individual

The concept of "personality" is multifaceted and multifaceted in its basis, and therefore, in science has always been a great difficulty in determining its essence and content. For example, in Antiquity, "personality" as such, dissolves in the concept of "society". There is no "human" yet, but there is a genus, a community, a people that are only quantitatively formed from the mass of different individuals, governed and subordinated to any one idea (custom, tribal or ethno-religious) espoused by this society. In other words, in such societies, the individual was not unique and unique; his personality (we understand - personality) was limited to the general, the collective. This is confirmed by the Jewish and early Christian texts.

Fundamental Study for Locating Water Tree Degradation in XLPE Cables

2015 ◽  
Vol 135 (7) ◽  
pp. 424-430 ◽  
Author(s):  
MyongHwan Kim ◽  
Yoshinobu Murakami ◽  
Masayuki Nagao ◽  
Naohiro Hozumi ◽  
Takashi Kurihara ◽  
...  
Keyword(s):  
Fundamental Study ◽  
Water Tree

Investigation of Water Tree Degradation in Dry-cured and Extruded Three-layer (E-E Type) 6.6kV Removed XLPE Cables

2016 ◽  
Vol 136 (3) ◽  
pp. 333-343
Author(s):  
Takashi Kurihara ◽  
Eiji Tsutsui ◽  
Eiji Nakanishi ◽  
Kiyoshi Maki ◽  
Kenichi Murakawa ◽  
...  
Keyword(s):  
Water Tree

scholarly journals Teaching First Aid to Prospective Teachers as a Way to Promote Child Healthcare

Healthcare ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 367
Author(s):  
María del Carmen Olmos-Gómez ◽  
Francisca Ruiz-Garzón ◽  
Paula Pais-Roldán ◽  
Rafael López-Cordero
Keyword(s):  
Professional Development ◽  
Qualitative Study ◽  
Prospective Teachers ◽  
Structured Interview ◽  
First Aid ◽  
Great Difficulty ◽  
Public University ◽  
Future Teachers ◽  
Emergency Situations ◽  
Child Healthcare

This article aimed to analyze, through a qualitative study (i.e., semi-structured interview), the opinions and knowledge of fourth-year future teachers at a Spanish public university (University of Granada) regarding training and the need for first aid (FA) at school. With a sample of 70 subjects in their last year of training, our conclusion is that although they are aware of the importance of first aid for their professional development, there is no such training in their careers, and thus they have great difficulty understanding how to react to emergency situations on the job.

Geotechnical settings of volcanic residual soils and derived engineering problems in El Hierro Island (Spain)

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Fabiola Fernández-Baniela ◽  
Daniel Arias ◽  
Álvaro Rubio-Ordóñez
Keyword(s):  
Residual Soils ◽  
El Hierro ◽  
Engineering Problems

scholarly journals Water-Tree Resistant Characteristics of Crosslinker-Modified-SiO2/XLPE Nanocomposites

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1398
Author(s):  
Yong-Qi Zhang ◽  
Xuan Wang ◽  
Ping-Lan Yu ◽  
Wei-Feng Sun
Keyword(s):  
Electric Fields ◽  
Tree Growth ◽  
Mechanical Analysis ◽  
Water Molecules ◽  
Crosslinking Degree ◽  
Water Tree ◽  
Tree Resistance ◽  
Alternating Electric Fields ◽  
Trimethylolpropane Triacrylate ◽  
Mechanical Performances

Trimethylolpropane triacrylate (TMPTA) as a photoactive crosslinker is grafted onto hydrophobic nanosilica surface through click chemical reactions of mercapto double bonds to prepare the functionalized nanoparticles (TMPTA-s-SiO2), which are used to develop TMPTA-s-SiO2/XLPE nanocomposites with improvements in mechanical strength and electrical resistance. The expedited aging experiments of water-tree growth are performed with a water-knife electrode and analyzed in consistence with the mechanical performances evaluated by means of dynamic thermo-mechanical analysis (DMA) and tensile stress–strain characteristics. Due to the dense cross-linking network of polyethylene molecular chains formed on the TMPTA-modified surfaces of SiO2 nanofillers, TMPTA-s-SiO2 nanofillers are chemically introduced into XLPE matrix to acquire higher crosslinking degree and connection strength in the amorphous regions between polyethylene lamellae, accounting for the higher water-tree resistance and ameliorated mechanical performances, compared with pure XLPE and neat-SiO2/XLPE nanocomposite. Hydrophilic TMPTA molecules grafted on the nano-SiO2 surface can inhibit the condensation of water molecules into water micro-beads at insulation defects, thus attenuating the damage of water micro-beads to polyethylene configurations under alternating electric fields and thus restricting water-tree growth in amorphous regions. The intensified interfaces between TMPTA-s-SiO2 nanofillers and XLPE matrix limit the segment motions of polyethylene molecular chains and resist the diffusion of water molecules in XLPE amorphous regions, which further contributes to the excellent water-tree resistance of TMPTA-s-SiO2/XLPE nanocomposites.

scholarly journals Probabilistic identification of rockfall source areas at regional scale in El Hierro (Canary Islands, Spain)

Geomorphology ◽  
2021 ◽  
Vol 381 ◽  
pp. 107661
Author(s):  
Mauro Rossi ◽  
Roberto Sarro ◽  
Paola Reichenbach ◽  
Rosa María Mateos
Keyword(s):  
Canary Islands ◽  
Regional Scale ◽  
Source Areas ◽  
El Hierro

Radon measurements in public buildings in El Hierro, Canary Islands (Spain)

2021 ◽  
Author(s):  
Juan C. Santamarta ◽  
Luis E. Hernández-Gutiérrez ◽  
Jesica Rodríguez-Martín ◽  
Anastasia Hernández Alemán ◽  
José Luis Gutiérrez Villanueva ◽  
...  
Keyword(s):  
Canary Islands ◽  
Public Buildings ◽  
El Hierro ◽  
Radon Measurements
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