Results 61 to 70 of about 49,132 (262)

THE AMERICAN CIVIL WAR

Coleção Meira Mattos, 2014
A obra trata da história militar da Guerra Civil Americana, tentando responder como o Sul conseguiu lutar por tanto tempo e tao bem diante de tamanha desvangagem em material e recursos humanos. Ao mesmo tempo que trata das batalhas emblemáticas, consegue
Marcos Heleno Guerson de Oliveira Junior
doaj   +4 more sources

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

Advanced 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, Welman C. Elias, Hunter P. Jacobs, Kimberly N. Heck, Saghar Rezaie, Sadegh Yazdi, Kiheon Hong, Justin J. Dodson, Laiyuan Chen, Sean G. Mueller, Steven R. Alexander, Michael S. Wong   +11 more
wiley   +1 more source

الحرب الاھلیة في سیرالیون

مجلة كلية التربية للبنات, 2019
The civil war in Seralion is considered as complex model of internal conflicts in Africa because link to crises have relation to political, economical, social and cultural conditions, which were infected by disability and paralysis in function ...
أ.م.د. جاسم یونس الحریري
doaj  

Reconstructing Quantum Dot Surfaces via Dual‐Functional Ligand Pairing Enables Efficient Shortwave Infrared Optoelectronics

Advanced Functional Materials, EarlyView.
This work presents a ligand‐pairing strategy that reconstructs lead sulfide quantum dot surfaces for efficient short‐wave infrared optoelectronics. A low‐reactivity thiourea precursor combined with hydrobromic acid enables monodisperse and fully passivated quantum dots.
Dongeon Kim, Minjung Yang, Yunjin Lee, Gaeun Cho, Min‐Jae Si, Jaewoo Jeong, Seoryeon Jeong, Sol‐Hee Kim, Taeho Han, Seungin Jee, Byeong‐Chan Kim, Woong Kim, Seungmin Lee, Jun Hong Noh, Han Seul Kim, Yujin Jung, Se‐Woong Baek   +16 more
wiley   +1 more source

Increasing Inter‐Micellar Connectivity Toughens and Imparts Cooling‐Induced Shape Memory in Micellar Hydrogels

Advanced Functional Materials, EarlyView.
Oligomerizing Pluronic triblock copolymers provides a processing strategy for tuning the mechanical properties and stimuli‐responsive behaviors of micellar hydrogels. Varying oligomer fraction produces hydrogels spanning brittle to highly extensible responses; maintaining micellar architectures enables cooling‐induced reverse thermal shape memory and ...
Gourav Kumbhojkar, Eric Yang, Arman Moussavi, EunBi Oh, Haeji Kim, Wei Chen, Junsoo Kim, Sinan Keten, Ryan L. Truby   +8 more
wiley   +1 more source

THE NIGERIAN CIVIL WAR, 1967-1970: ISSUES AND PERSPECTIVES [PDF]

Romanian Journal of Historical Studies
This paper dwells on the Nigerian Civil War. It argues that conflicts and crises usually emanate from society as a result of competition over scarce resources.
Thaddeus T. Ityonzughul
doaj  

Designation of the Civil War in the Epistles, Addresses, and Speeches of Patriarch Tikhon and in the Materials and Diaries of the Members of the Local Council

Historia provinciae: журнал региональной истории
The article is devoted to the use of the denomination “civil war” in the church milieu in 1917–20. In the summer of 1917 the Holy Synod published an epistle about the “domestic fratricidal war,” which began in Russia according to the highest church ...
Pavel G. Rogozny
doaj   +1 more source

Tough, Ductile, and Strong Hard‐Soft Cementitious Composite Enabled by Multi‐Material Additive Manufacturing

Advanced Materials, EarlyView.
Drawing inspiration from the layered hard‐soft architecture found in sea sponges, this work establishes a new framework for architected cementitious composites (ACC) through multi‐material additive manufacturing (MMAM) process. The integration of mortar and elastomer phases into layered architectures enables synergistic toughening mechanisms, including
Aimane Najmeddine, Shashank Gupta, William Makinen, Zayvinn Lin, Krystal Delnoce, Reza Moini   +5 more
wiley   +1 more source

Sub‐Nanometer Curvature Unlocks Quantum Orbital Flexoelectricity in Graphene

Advanced Materials, EarlyView.
In self‐assembled, reproducible, large‐area, quasi‐pristine graphene nanowrinkles, extreme curvature forces out‐of‐plane π‐electrons toward hybridization, driving a transition from classical to quantum orbital flexoelectricity. As curvature approaches the fundamental physical limit set by the C─C bond length, the resulting polarization increases by ...
Sathvik Ajay Iyengar, James G. McHugh, Jonathan P. Salvage, Robert Vajtai, Venkataramana Gadhamshetty, Alan B. Dalton, Manoj Tripathi, Pulickel M. Ajayan, Vincent Meunier   +8 more
wiley   +1 more source

Impact of long-term civil disorders and wars on the trajectory of HIV epidemics in sub-Saharan Africa

SAHARA-J, 2004
From the mid-1970s, seven countries in sub-Saharan Africa have experienced civil disorders and wars lasting for at least 10 years. In two — Sierra Leone during 1991–2002, and Somalia from 1988 and continuing — adult HIV prevalence remained below 1%.
David Gisselquist
doaj   +1 more source