Results 161 to 170 of about 3,727,158 (394)

Cathodic Cage Plasma Deposition of Nanostructured Cu–Fe–Se Coatings on Poly(methyl Methacrylate)

open access: yesAdvanced Engineering Materials, EarlyView.
Nanostructured Cu–Fe–Se coatings are deposited on PMMA by a modified cathodic cage plasma process, enabling low‐temperature deposition on polymer substrates. A transition from discontinuous to compact morphology is observed with temperature, with optimal properties at 200°C, where improved CuFeSe2‐type bonding, lowest sheet resistance, and favorable ...
V. S. S. Sobrinho   +8 more
wiley   +1 more source

Constitutionalizing dissent: The universe of opposition rules in African constitutions

open access: yesGlobal Constitutionalism
Constitutions are the most important legal foundation of politics. At the same time, the existence of a viable parliamentary opposition has been regarded one of the most distinctive characteristics of democracy.
Danny Schindler
doaj   +1 more source

Turkey’s protests have stirred debate about democracy and the unchecked power of governments that have an electoral mandate. [PDF]

open access: yes, 2013
What do the protests of the past two weeks mean for democracy in Turkey? Zeynep N. Kaya and Matthew Whiting argue that they represent the clash between the desire of the Prime Minister, Recep Tayip Erdoğan, for a majoritarian politics with few checks on ...
Kaya, Zeynep, Whiting, Matthew
core  

Ideal Molecular Sieving with a Dense MOF for Helium Upgrading with Highly Diffusion Selective Mixed Matrix Membranes

open access: yesAdvanced Functional Materials, EarlyView.
The separation of Helium gas from natural gas is challenging but highly important. MIL‐116(Ga), a “non‐porous” metal–organic framework is used as a molecular sieve to separate He from CH4. Druse‐like MIL‐116(Ga) particles are integrated into polysulfone mixed matrix membranes.
Ayisha Komal   +10 more
wiley   +1 more source

Understanding and Optimizing Li Substitution in P2‐Type Sodium Layered Oxides for Sodium‐Ion Batteries

open access: yesAdvanced Functional Materials, EarlyView.
This work explores Li‐substituted P2 layered oxides for Na‐ion batteries by crystallographic and electrochemical studies. The effect of lithium on superstructure orderings, on phase transitions during synthesis and electrochemical cycling and on the interplay of O‐ versus TM‐redox is revealed via various advanced techniques, including semi‐simultaneous 
Mingfeng Xu   +5 more
wiley   +1 more source

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