Results 31 to 40 of about 306,510 (300)

Geology, Pb and S Isotope Geochemistry, and Genesis of the Na Bop-Pu Sap Lead-Zinc Deposit in the Cho Don area, Northeastern Vietnam

open access: yesIraqi Geological Journal, 2023
The Na Bop-Pu Sap Pb-Zn ore bodies represent a typical vein-type lead-zinc deposit situated in the Cho Don area and are currently being extracted for their lead and zinc resources.
Khuong Hung   +5 more
doaj   +1 more source

Fractal Prediction of Grouting Volume for Treating Karst Caverns along a Shield Tunneling Alignment

open access: yesApplied Sciences, 2017
Karst geology is common in China, and buried karst formations are widely distributed in Guangdong province. In the process of shield tunneling, the abundant water resources present in karst caverns could lead to the potential for high water ingress, and ...
Wen-Chieh Cheng   +4 more
doaj   +1 more source

Metamorphism and its bearing on geosystems

open access: yesGeosystems and Geoenvironment, 2022
The Earth is a dynamic, ever-changing planet, and there exist many feedbacks and cycles that operate within and between its subsystems. Interactions between processes operating in the solid Earth, atmosphere, hydrosphere, and biosphere have become ...
Richard M. Palin
doaj   +1 more source

Liquid Phase Transmission Electron Microscopy: A Window into the Early Stages of Complex Material Formation

open access: yesAdvanced Functional Materials, EarlyView.
Liquid‐phase transmission electron microscopy enables direct observation of nucleation and growth processes in solution. This review is dedicated to the remembrance of Helmut Cölfen and highlights recent studies on complex materials—oxides, biominerals, organic–inorganic crystals—which were central to his research activity. It summarizes key milestones,
Charles Sidhoum   +5 more
wiley   +1 more source

Les « Éducations à » et les sciences de la nature : entre dédisciplinarisation et redisciplinarisation

open access: yesÉducation et Socialisation, 2014
In France, “educations for” has recently gained ground inside curricula, leading us to rethink the aims and operation of disciplinary lessons. We choose to focus on science disciplines (biology, geology and physics), by considering their approaches as a ...
Denise Orange Ravachol
doaj   +1 more source

Estimation of VS30 using shallow depth time-averaged shear wave velocity of Rawalpindi–Islamabad, Pakistan

open access: yesGeomatics, Natural Hazards & Risk, 2023
The time-averaged shear wave velocity of top 30 m (VS30) is the most commonly used parameter to classify a site and evaluate its amplification characteristics for the seismic design.
Muhammad Bilal Adeel   +6 more
doaj   +1 more source

Essential Design Elements for Successful Online Courses [PDF]

open access: yes, 2003
This article describes a study of how students perceive and interact with web-based education, with the intent of improving the experience. In particular, the study aimed to understand how undergraduate students learn classical geological laboratory ...
Wayne Powell
core   +1 more source

Spiro‐Phenothiazine Hole‐Transporting Materials: Unlocking Stability and Scalability in Perovskite Solar Cells

open access: yesAdvanced Materials, EarlyView.
Fluorene‐functionalized spiro‐phenothiazine (PTZ‐Fl) exhibits strong Li+ affinity and thermal stability, enabling a PCE of 25.75% in small‐area cells and 22.07% in 25 cm2 modules. Under ISOS‐L3 conditions, PTZ‐Flbased devices retain over 80% efficiency after 1000 hours, demonstrating superior stability and scalability compared to spiro‐OMeTAD for next ...
Javier Urieta‐Mora   +17 more
wiley   +1 more source

Argumentation on tasks of Biology and Geology Portuguese textbooks [PDF]

open access: yesInvestigações em Ensino de Ciências, 2012
Argumentation is a transversal dimension to the process of constructing scientific knowledge, which is recognized as increasingly important. The Portuguese official curricula, such as the syllabus of the subject of biology and geology, from secondary ...
Paulo Almeida   +2 more
doaj  

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