Results 81 to 90 of about 29,768,854 (286)

Thermal‐induced fracture evolution and acoustic signature of Beishan granite: Insights into tensile strength of barrier system for high‐level radioactive waste disposal

open access: yesDeep Underground Science and Engineering, EarlyView.
The tensile strength of granite, a proposed host for nuclear waste, degrades severely above 400°C. We link this to specific microcracking patterns captured by acoustic emission, establishing a scientific basis for assessing repository safety under thermal load.
Wei Zeng   +7 more
wiley   +1 more source

Preimages for SHA-1 [PDF]

open access: yes, 2018
This research explores the problem of finding a preimage "” an input that, when passed through a particular function, will result in a pre-specified output "” for the compression function of the SHA-1 cryptographic hash.
Motara, Yusuf Moosa
core   +1 more source

Freestart collision for full SHA-1 [PDF]

open access: yes, 2015
We present in this article a freestart collision example for SHA-1, i.e., a collision for its internal compression function. This is the first practical break of the full SHA-1, reaching all 80 out of 80 steps, while only 10 days of computation on a 64 ...
Karpman, P. (Pierre)   +2 more
core  

Molecular Modification Strategies for CO2 Electroreduction to C2+ Products: Classifications, Mechanisms, Advances, and Perspectives

open access: yesEcoEnergy, EarlyView.
This review comprehensively outlines molecular modification strategies for steering CO2 electroreduction toward C2+ products, including the classification of diverse molecular structures, elucidation of their roles in microenvironment regulation, dissection of C–C coupling pathway engineering, and forward‐looking perspectives on machine learning and ...
Lingling Peng, Hanwen Liu, Tianyou Peng
wiley   +1 more source

Evaluating the efficacy of eggshell-derived hydroxyapatite (EHA) and synthetic hydroxyapatite (SHA) in bone regeneration of maxillofacial defects-a randomized double-blind pilot comparative clinical-radiological study

open access: yesJournal of Oral Biology and Craniofacial Research
Background: Defects of the maxillofacial skeleton lead to functional, aesthetic, social, and behavioral problems, that make the person isolate from the mainstream of society. So, bone regeneration is needed for the overall health. Since long time various
Khushboo Changani   +6 more
doaj   +1 more source

Engineering Zn Powder Anodes for Advanced Aqueous Zn‐Based Batteries

open access: yesEcoEnergy, EarlyView.
Zn powder (ZnP) anodes have attracted growing interest in aqueous Zn‐based batteries (AZBs) because they enable high Zn utilization, relaxed mechanical constraints, and versatile electrode fabrication. This review systematically summarizes recent advances in ZnP anodes, focusing on crystallographic engineering, interfacial regulation, electrode ...
Xiaona Fu   +6 more
wiley   +1 more source

Cryptanalysis of Block Ciphers Based on SHA-1 and MD5 [PDF]

open access: yes, 2003
We cryptanalyse some block cipher proposals that are based on dedicated hash functions SHA-1 and MD5. We discuss a related-key attack against SHACAL-1 and present a method for finding ”slid pairs” for it. We also present simple attacks against MDC-MD5 and the Kaliski-Robshaw block cipher.
openaire   +2 more sources

Harnessing Natural Wood Architecture: A Self‐Supporting, Hierarchically Porous NiFe@Carbon Capacitive Anode Enhances Electricity Generation and Storage in Microbial Fuel Cells

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This study reports a mild “Zn(NO3)2 interlayer‐expansion” strategy combined with electrodeposition to produce a self‐supporting capacitive anode (NiFe@PC) that preserves the wood's native low‐tortuosity channels. The retained native architecture expands niches for microbial colonization.
Xue Liu   +10 more
wiley   +1 more source

Synergistic Integration of Electronic Structure Modulating and Hierarchical Mass Transport Channels in Wood‐Derived Electrocatalysts for Efficient Oxygen Evolution

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
By combining electronic structure modulation and hierarchical channel construction, a wood‐derived Cr‐Co2P@PNC/PCW electrocatalyst is developed. This multicomponent synergistic modulation strategy significantly improves the efficiency of OER. Designing synergistic regulation strategies is widely recognized as an effective approach to enhancing ...
Zihan Zhang   +8 more
wiley   +1 more source

Low‐Dimensional Materials and Van Der Waals Heterostructures for Energy Application: A Comprehensive Review

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Low‐dimensional materials (0D, 1D, and 2D) exhibit unique electronic and physicochemical properties, enabling advanced nanoelectronic and optoelectronic devices. Mixed‐dimensional heterostructures combine these materials to enhance functionality.
Qaisar Alam   +3 more
wiley   +1 more source

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