Results 111 to 120 of about 1,649,082 (293)

A Reliable Method for Predicting the Specific Impulse of Chemical Propellants

open access: yesJournal of Aerospace Technology and Management, 2018
The specific impulse (Isp) is an important performance parameter that describes energy efficiency of propellant combustion and is intimately related to the rocket engine thrust.
Dany Frem
doaj  

Phase‐Pure and Size‐Tunable Tin Halide Perovskite Quantum Dots

open access: yesAdvanced Materials, EarlyView.
A trioctylphosphine oxide modulated protocol allows for the synthesis and study of the optical properties of a broad library of tin halide perovskite quantum dots across multiple A‐ and X‐site compositions with precise size tuning while eliminating unwanted 2D phases.
Ole F. Dressler   +7 more
wiley   +1 more source

A note on the Monte Carlo assessment of Impulse Saturation with fat tailed distribution [PDF]

open access: yes
Monte Carlo evidence is provided as to the efficiency of the impulse saturation estimator in a location-scale model with heavy-tailed distributions. Comparisons show that the IS estimator is always more efficient than the OLS and can even outperform the ...
Carlos Santos
core  

Dual Ventricular Response or 1 : 2 Atrioventricular Conduction in Dual Atrioventricular Nodal Physiology

open access: yesIndian Pacing and Electrophysiology Journal, 2008
Dual ventricular response to a single supraventricular impulse is an interesting possibility in the presence of dual atrioventricular nodal physiology. Double His bundle and ventricular responses to a single atrial impulse caused by a simultaneous fast ...
Krishnan MN, Johnson Francis
doaj  

The Double Within: A Case of Madness or Unconscious Desire?

open access: yesAtlantis
The nineteenth century has treated the double as a literary motif to explain the unsettling nature of a self divided between good and evil. Fyodor Dostoevsky’s The Double and Robert Louis Stevenson’s Strange Case of Dr. Jekyll and Mr.
Alberto Castelli
doaj   +1 more source

Sustainable and Multifunctional Natural Macromolecular Polymers for Aqueous Zn Metal Batteries

open access: yesAdvanced Materials, EarlyView.
We comprehensively review the structure‐function relationships and regulatory mechanism of natural macromolecular polymers in stabilizing zinc anodes at the microscopic and mesoscopic scales. The interactions among polymer structures, optimization strategies, and regulatory mechanisms are discussed systematically summarizing recent related research ...
Yunuo Shi   +13 more
wiley   +1 more source

Break a Leg

open access: yes, 2015
A 95-minute stand-up comedy show written and performed by Oliver Double. Venue: The Gulbenkian Theatre, Canterbury Date: Sunday, 6th December 2015 Audience: 176 Description: A show about the recovery process following a broken femur, exploring ...
Double, Oliver
core  

Adsorption‐Engineered Hydrocarbon Ionomers for Durable Proton‐Exchange Membrane Fuel Cells

open access: yesAdvanced Materials, EarlyView.
Hydrocarbon ionomers suffer from oxidation‐driven interfacial degradation in PEM fuel cell cathodes, leading to catalyst instability. Here, adsorption‐engineered poly(fluorene) ionomers decouple interfacial anchoring from oxidative degradation, enabling strong catalyst–ionomer interactions while resisting electrochemical oxidation.
Heemin Park   +14 more
wiley   +1 more source

Polyphenol‐Inspired Materials for Agricultural Applications

open access: yesAdvanced Materials, EarlyView.
This review outlines the use of polyphenol‐inspired materials for sustainable agriculture, highlighting their molecular design, interfacial assembly, structure–property relationships, and prospects toward precision agriculture, climate resilience, ecosystem protection, and circular bioeconomy strategies.
Haofu Liu   +8 more
wiley   +1 more source

Ein CRM-System für neue Impulse in der Datenverwaltung - Konzipierung und Einführung von CiviCRM

open access: yes, 2013
Impulse Basel ist eine Non-Profit-Organisation mit dem Ziel, die Integration von Menschen mit Behinderung in den ersten Arbeitsmarkt zu fördern. Hierfür verfügt Impulse Basel über ein breites Netzwerk von Kontakten.
Römer, Jan
core  

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