Results 81 to 90 of about 1,237,224 (236)

Maximizing resource efficiency with dairy and municipal wastewater as nutrient media for Chlorella vulgaris with simultaneous CO2 sequestration

Discover Environment
Addressing critical environmental challenges such as greenhouse gas emissions, global warming, and eutrophication demands urgent and innovative solutions. In recent years, microalgae have emerged as a promising avenue for addressing these pressing issues.
Suchismita Pattanaik, Subhasmita Panigrahi, Nilotpala Pradhan, Bibhuranjan Nayak   +3 more
doaj   +1 more source

Effect of Arenite, Calcareous, Argillaceous, and Ferruginous Sandstone Cuttings on Filter Cake and Drilling Fluid Properties in Horizontal Wells

Geofluids, 2019
Fine, small-size, drilled cuttings, if not properly separated using mud conditioning equipment at the surface, are circulated with the drilling fluid from the surface to the bottom hole.
Badr S. Bageri, Mohammed Benaafi, Mohamed Mahmoud, Shirish Patil, Abdelmjeed Mohamed, Salaheldin Elkatatny   +5 more
doaj   +1 more source

Cutting concentration prediction in horizontal and deviated wells using artificial intelligence techniques

Journal of Petroleum Exploration and Production Technology, 2019
Improper hole cleaning or drilled-cutting transportation impacts drilling operations. To illustrate, inefficient cleaning of the wellbore can lead to many drilling problems such as low drilling rate (i.e. low ROP), early bit wear and, in the severe cases,
Khaled Al-Azani, Salaheldin Elkatatny, Abdulwahab Ali, Emad Ramadan, Abdulazeez Abdulraheem   +4 more
doaj   +1 more source

Highly Active 2D Layered MoS 2 -rGO Hybrids for Energy Conversion and Storage Applications

Scientific Reports, 2017
The development of efficient materials for the generation and storage of renewable energy is now an urgent task for future energy demand. In this report, molybdenum disulphide hollow sphere (MoS2-HS) and its reduced graphene oxide hybrid (rGO/MoS2-S ...
Swagatika Kamila, Bishnupad Mohanty, Aneeya K. Samantara, Puspendu Guha, Arnab Ghosh, Bijayalaxmi Jena, Parlapalli V. Satyam, B. K. Mishra, Bikash Kumar Jena   +8 more
doaj   +1 more source

Quartz and Prehnite: Minerals during the Renaissance

, 2017
Minerals were displayed in wonder rooms for their beauty and used by apothecaries for their medical properties and artists, for sculptures and pigments. Minerals during the Renaissance were collected and displayed in wonder rooms to illustrate the beauty
Zeltmann, Shannon R.
core  

Timescales of carbon turnover in soils with mixed crystalline mineralogies

, 2017
Organic matter–mineral associations stabilize much of the carbon (C) stored globally in soils. Metastable short-range-order (SRO) minerals such as allophane and ferrihydrite provide one mechanism for long-term stabilization of organic matter in young ...
Bern, C., Chadwick, O., Khomo, L., Trumbore, S.   +3 more
core   +2 more sources

Towards Secure Blockchain-enabled Internet of Vehicles: Optimizing Consensus Management Using Reputation and Contract Theory [PDF]

arXiv, 2018
In Internet of Vehicles (IoV), data sharing among vehicles is essential to improve driving safety and enhance vehicular services. To ensure data sharing security and traceability, highefficiency Delegated Proof-of-Stake consensus scheme as a hard security solution is utilized to establish blockchain-enabled IoV (BIoV).
arxiv  

Plasmonic Nanostructured Cellular Automata

EPJ Web of Conferences, 2017
In this work, we have investigated the scattering plasmonic resonance characteristics of silver nanospheres with a geometrical distribution that is modelled by Cellular Automata using time-domain numerical analysis.
Alkhazraji Emad, Ghalib A., Manzoor K., Alsunaidi M. A.   +3 more
doaj   +1 more source

Revisiting the Primitives of Transaction Fee Mechanism Design [PDF]

Transaction Fee Mechanism Design studies auctions run by untrusted miners for transaction inclusion in a blockchain. Under previously-considered desiderata, an auction is considered `good' if, informally-speaking, each party (i.e., the miner, the users, and coalitions of both miners and users) has no incentive to deviate from the fixed and pre ...
arxiv   +1 more source

Minerals in Afghanistan : rare-metal deposits [PDF]

, 2007
In Afghanistan rare metals (lithium, caesium, tantalum and niobium) occur in three main deposit types: pegmatites, mineralised springs and playa-lake sediments (Figure 1).
Benham, Antony John, Coats, Stan
core