Results 61 to 70 of about 246,864 (291)

Ionic Precursors Transformed Into Vinyl Acetate Synthesis Catalyst via Reaction‐Driven Restructuring

open access: yesAdvanced Functional Materials, EarlyView.
This work demonstrates that a simple physical mixture of Pd and Au ionic precursors, KOAc promoter, and SiO2 support can transform into a highly active vinyl acetate synthesis catalyst through reaction‐driven restructuring. The results highlight reaction‐induced restructuring as an innovative and sustainable catalyst design strategy.
Byeong Jun Cha   +11 more
wiley   +1 more source

Επίκαιρος: Εφημερίς. Απ΄όλα δι΄όλους. Έτος πρώτον [1909]. Τεύχη αρ. 1-33 / υπό Γ. Μανούσου (ιδιοκτήτης), Α. Γεωργιάδη (διευθυντής), Θ, Μπένα (διαχειριστής) [PDF]

open access: yes, 1909
400 σ.: εικ.; 21,5χ29 εκ. 1 δεκαεξασέλιδο+32 δωδεκασέλιδα τεύχη. Το όνομα του Θ. Μπένα αναφέρεται μόνο στα πρώτα 3 τεύχη.
Μπένας, Θ.   +2 more
core  

Upcycling Keratin‐Based Textile Waste Into High‐Performance Hybrid Fibers Via Tuning the Interfacial Interactions

open access: yesAdvanced Functional Materials, EarlyView.
Keratin recovered from animal‐hair textile waste is fractionated and blended with cellulose to produce continuously spun hybrid fibers. Selecting the high‐molecular‐weight keratin fraction enables 30 wt.% keratin incorporation while maintaining high strength in dry and wet states.
Mian Zhai   +6 more
wiley   +1 more source

An approximation of the Hurwitz zeta function by a finite sum

open access: yesLietuvos Matematikos Rinkinys, 2003
We obtain the following version of the approximation of the Hurwitz zeta-function. Let σ ≥ 0 and |t| ≤ π x. Then ζ(s, α) = ∑0 ≤ n ≤ x 1/(n + α)s +{ (x + α)1−s}/(s − 1) + Θ ({7√2π−1 + 3}/xσ).
Ramūnas Garunkštis
doaj   +3 more sources

Strength characteristics and damage constitutive model of sandstone under hydro-mechanical coupling

open access: yesApplied Rheology, 2023
To study the mechanical properties of saturated sandstone, experiments were conducted under hydro-mechanical coupling on saturated sandstone. A damage constitutive model was established to describe the response of saturated sandstone under pore pressure,
Liu Qiang   +6 more
doaj   +1 more source

Operadores θ-monótonos en espacios de Banach reflexivos [PDF]

open access: yes, 2021
En el presente trabajo, se siguen las ideas de [2] para operadores σ-monótonos, probamos la acotación local de un operador θ-monótono multivaluado en el contexto de los espacios de Banach reflexivos de dimensión infinita con ayuda de las bifunciones ...
Paredes Rojas, Edu
core  

Rapid Microwave Plasma Engineering of HfO2/C@C Core‐Shell Fibrous Membrane Toward Flexible High‐Performance Electromagnetic Wave Absorption

open access: yesAdvanced Functional Materials, EarlyView.
Rapid microwave plasma torch engineering tunes crystal phases, carbon graphitization and oxygen‐vacancy defects in HfO2/C@C core‐shell fibrous membranes. Synergistic multi‐loss effects optimize impedance matching to deliver −65.75 dB reflection loss and a 7.37 GHz effective bandwidth for flexible electromagnetic wave absorption.
Qichao Ding   +14 more
wiley   +1 more source

Η έννοια του κράτους κατά τον Jean Bodin

open access: yes, 1998
Διατριβή (διδακτορική) - Πάντειο Πανεπιστήμιο. Τμήμα Πολιτικής Επιστήμης και Ιστορίας, 1998Η διάθεση του ψηφιακού αρχείου έγινε από το ΕΚΤ. Η βιβλιοθήκη διαθέτει αντίτυπο και σε έντυπη μορφή.Βιβλιογραφία: σ.
Συνοδινού, Αγγελική Θ.
core   +1 more source

Full‐Field Damage Monitoring in Architected Lattices Using In situ Electrical Impedance Tomography

open access: yesAdvanced Functional Materials, EarlyView.
In situ electrical impedance tomography (EIT) turns 3D‐printed, CNT‐infused architected lattices into full‐field damage‐imaging systems. Tunable Voronoi‐based geometries act as active sensing architectures, enabling conductivity maps to detect early‐stage damage and localise sequential ligament fracture before catastrophic failure.
Akash Deep   +4 more
wiley   +1 more source

Nonlinear Fredholm equations in modular function spaces [PDF]

open access: yes, 2019
We investigate the existence of solutions in modular function spaces of the Fredholm integral equation Φ(θ) = g(θ) + ∫10 ƒ(θ, σ, Φ(σ)) dσ, where Φ(θ), g(θ) ∈ Lρ, θ ∈ [0, 1], ƒ : [0, 1] x [0, 1] x Lρ → ℝ.
Bachar, Mostafa
core   +1 more source

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