Results 11 to 20 of about 2,479,486 (360)

Clustered stone forest in Pu Dou Chun (Yunnan, China)

open access: yesActa Carsologica, 2022
One of the unique examples of the development of subsoil karren into a stone forest on the varied geological bedrock of the Lunan surface is revealed to us.
Martin Knez, Hong Liu, Tadej Slabe
doaj   +1 more source

Distribution Characteristics and Sources Identification of Selenium-rich Soils in the Ecological Conservation Area of the Daqinghe River Watershed, Beijing

open access: yesYankuang ceshi, 2019
BACKGROUND Beijing is a typical geographical distribution area of selenium deficiency. However, some research results in recent years indicate that the soils in some areas reaches the level of selenium enrichment.
FENG Hui   +3 more
doaj   +1 more source

The archaeology of rock art in Northern Africa [PDF]

open access: yes, 2017
The first reports on the rock art of north Africa were written in the mid-nineteenth century. Since then, rock art has become a key area of African archaeological research.
DI LERNIA, Savino
core   +1 more source

El Rock y la ciudad

open access: yesAnales del Instituto de Arte Americano e Investigaciones Estéticas "Mario J. Buschiazzo", 2023
Te devora la ciudad. Itinerarios urbanos y figuraciones espaciales en el rock de Buenos Aires. Sánchez Trolliet, Ana. Buenos Aires, Argentina: Editorial Universidad Nacional de Quilmes, 2022, 347 páginas.
Juan Sebastián Malecki
doaj  

Projective Normality Of Algebraic Curves And Its Application To Surfaces [PDF]

open access: yes, 2006
Let $L$ be a very ample line bundle on a smooth curve $C$ of genus $g$ with $\frac{3g+3}{2}\max\{2g+2-4h^1(C,L), 2g-\frac{g-1}{6}-2h^1(C,L)\}$. Let $C$ be a triple covering of genus $p$ curve $C'$ with $C\stackrel{\phi}\to C'$ and $D$ a divisor on $C ...
Rock Kim, Seonja Kim, Young
core   +4 more sources

Methods and Points of Attention for the Direct Tension Test on Rock

open access: yesJournal of MMIJ, 2016
Compared to uniaxial or triaxial compression tests on rocks, direct tension tests on rocks are not common in practice. As is well known, the reasons are because underground rock masses are usually under compressive stress state and/or because the direct ...
Kimihiro HASHIBA   +5 more
doaj   +1 more source

Od psalmów dawidowych do chrześcijańskiego rocka - muzyczna subkultura młodzieżowa jako narzędzie ewangelizacji. Ujęcie historyczne

open access: yesSeminare
Celem artykułu jest ukazanie muzyki rockowej jako narzędzia ewangelizacji. Sobór Watykański II zapoczątkował nową relację środowiska kościelnego ze światem kultury i sztuki.
Artur Chejnowski
doaj   +1 more source

Measurement of Suction Pressure Generated in the Process of Frost Heaving in Rock

open access: yesJournal of MMIJ, 2017
Recently it has been found that frost heave phenomena can be seen not also in soil but also in rock. It is obvious, however, that the number of researches on frost heaving in rock is much less than that of researches on frost heaving in soil.
Dai NAKAMURA   +5 more
doaj   +1 more source

Study of the possibility of diamond formation at moderate pressures and temperatures [PDF]

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2017
Data on the diamond synthesis in experiments with carbon-saturated metal melts at moderate pressures and temperatures are presented. Features of the resulting diamond phase, the types and nature of inclusions are discussed and compared with those for ...
S.А. Voropaev   +4 more
doaj   +1 more source

Study on the size effect of rock elastic modulus considering the influence of joint roughness

open access: yesFrontiers in Materials
The elastic modulus of rocks is a measure of the ability of rocks to resist elastic deformation. It is related to the size of rocks and can effectively measure the internal physical and mechanical strength of rocks.
Gaojian Hu   +6 more
doaj   +1 more source

Home - About - Disclaimer - Privacy