Results 131 to 140 of about 369,293 (294)

Sub‐Nanometer Cobalt on Tungsten Titanium Carbide MXene (W2TiC2Tx): An Electrocatalyst for Highly Efficient and Stable Alkaline Hydrogen Evolution at Industrial‐Scale Current Density

open access: yesAdvanced Materials, EarlyView.
A novel W2TiC2Tx MXene prepared through a MAX‐phase route supports sub‐nanometer Co for highly efficient alkaline hydrogen evolution. Strong Co–W interfacial interactions optimize hydrogen adsorption and catalytic activity, enabling low overpotentials of 63 mV at 10 mA cm−2, small Tafel slope of 44.3 mV dec−1, and exceptional durability at industrially
Xiaopeng Liu   +15 more
wiley   +1 more source

MODELING MOVEMENT OF OBJECTS WITHOUT STOPS IN A NETWORK OF CROSSING ROUTES

open access: yesInformatika, 2018
Modeling of movement of objects without stops in a network of crossing routes is studied. The problem is formulated in terms of disjunctive linear programming, mixed integer linear programming and graph theory.
I. V. Rubanov   +2 more
doaj  

On the complexity of rationalizing behavior [PDF]

open access: yes
We study the complexity of rationalizing choice behavior. We do so by analyzing two polar cases, and a number of intermediate ones. In our most structured case, that is where choice behavior is defined in universal choice domains and satisfies the "weak ...
Miguel A. Ballester, Jose Apesteguia
core  

Decoding Synergistic Pathways in Bimetallic MOFs for Advanced Oxidation Processes

open access: yesAdvanced Materials, EarlyView.
This review presents a unified framework linking metal pairing and framework design with electronic structure, redox cycling, oxidant activation, reactive‐species generation, and catalytic performance across photocatalytic and oxidant‐based BMOF‐AOPs. The resulting design principles guide the development of hydrolytically stable and efficient BMOFs for
Karim El‐Naggar   +2 more
wiley   +1 more source

Inductively Expandable Supraparticles as Microscopic Force Generators for Remote Mechanical Actuation

open access: yesAdvanced Materials, EarlyView.
This study demonstrates the combination of magnetic nanoparticles and functional blowing agents into supraparticles. Upon induction heating, they actuate via rapid gas generation or extensive volume expansion. These supraparticles lift up to 25 000 times their own mass and rapidly open cured epoxy resins, providing a versatile strategy for fast micron ...
Leoni Luthardt   +3 more
wiley   +1 more source

Spectrally Coordinated Plasmonic–Photothermal Photocatalysts for Mineralization of Mixed Indoor VOCs Under White LED Illumination

open access: yesAdvanced Materials, EarlyView.
A plasmonic–photothermal–photocatalytic hybrid comprising Cu(II)‐grafted TiO2, yolk–shell Au@SiO2, and reduced graphene oxide sheets (CuT/AuSi‐GS) harvests full‐spectrum white light‐emitting diode (LED) light via complementary photocatalytic oxidation, localized surface‐plasmon‐resonance‐induced electric‐field enhancement, and photothermal acceleration.
Minhyung Lee   +10 more
wiley   +1 more source

Query Order and NP-Completeness

open access: yes, 2014
The effect of query order on NP-completeness is investigated. A sequence ~ D = (D1 ::: Dk) of decision problems is de ned to be sequentially complete for NP if each Di 2 NP and every problem in NP can be decided in polynomial time with one query to each
Jack H. Lutz, Jack J. Dai
core  

How “Green” is Your Functional Material? Assessing Environmental Impacts of Multi‐Step Synthetic Protocols in Material Sciences at Various Technology Levels

open access: yesAdvanced Materials, EarlyView.
Environmental Synthesis Radar (ESR) evaluates the environmental impact of (early‐stage) multi‐step chemical syntheses, providing a holistic view by using 18 midpoint impact categories. Unlike conventional life‐cycle assessment (LCA) approaches, ESR reveals three complementary metrics: overall impact Vtotal, environmental hotspots VEF, and critical ...
Laura Plein   +8 more
wiley   +1 more source

Teaching NP completeness in secondary schools

open access: yes, 2013
In this paper, we show how the theory of NP completeness can be introduced to students in secondary schools. The motivation of this research is that although there are difficult issues that require technical backgrounds, students are already familiar ...
Kim, Seungyon, Park, Seongbin
core  

NP-completeness of mind games and puzzles [PDF]

open access: yes, 2016
The hardest problems in NP are called NP-complete problems; these are problems that we currently do not know how to solve quickly. There is a variety of NP-complete decision problems in different fields, ranging from graph theory to logic and also note ...
Pahor, Samo
core  

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