Results 51 to 60 of about 522,747 (348)

COVID-19 impact on global maritime mobility

open access: yesScientific Reports, 2021
To prevent the outbreak of the Coronavirus disease (COVID-19), many countries around the world went into lockdown and imposed unprecedented containment measures.
Leonardo M. Millefiori   +6 more
doaj   +1 more source

Design of photonic crystal fibers with flat dispersion and three zero dispersion wavelengths for coherent supercontinuum generation in both normal and anomalous regions

open access: yesResults in Physics, 2021
A photonic crystal fiber (PCF) structure with three-zero dispersion wavelengths (ZDWs) and a flat dispersion curve was designed by adjusting the structural parameters (the diameters of small air holes inserted between standard lattices in the first and ...
Ying Huang   +4 more
doaj   +1 more source

Design Challenges to Expand the Functionality of Drones: Deformable Rotorcraft and Nature‐Inspired Flapping Drones

open access: yesAdvanced Intelligent Systems, EarlyView.
This review systematically analyzes deformable drones, including extendable, foldable, and tilting configurations, along with nature‐inspired flapping rotorcraft. By classifying deformation principles and structural mechanisms, design trade‐offs, functional capabilities, and future development potential are highlighted.
Ju‐Hee Lee   +9 more
wiley   +1 more source

Archaeological Damage Assessment in Conflict Zones: Integrating Satellite Imagery and Ground Surveys in Daraa, Syria

open access: yesArchaeological Prospection, EarlyView.
ABSTRACT Satellite remote sensing is among the most significant modern methodologies supporting field archaeology. In addition to its efficiency in identifying archaeological sites, remote sensing offers a safe and cost‐effective approach in conflict zones.
Amal Al Kassem   +5 more
wiley   +1 more source

National Identity Meaning and Attitudes Toward War, Peace, and the Future of Ukraine

open access: yesConflict Resolution Quarterly, EarlyView.
ABSTRACT The link between attitudes and social identity is complex, influencing perceptions, motivations, and actions. Social psychological research mainly focused on the role of attitude in identity formation, particularly in the contexts of social movements and collective action.
Karina V. Korostelina   +6 more
wiley   +1 more source

The Greek Military Regime (1967-1974) and the Cyprus Question — Origins and Goals [PDF]

open access: yes, 1982
This article employs the concept of military professionalism and its attributes to explain the Greek praetorian regime\u27s handling of the Cyrprus problem. Upon examining the relevant data it was found that for strategic considerations the U.S. and NATO
Danopoulos, Constantine P.
core   +1 more source

Soft Power in Trade: Quantifying the Impact of Confucius Institutes on China's Exports

open access: yesInternational Studies of Economics, EarlyView.
ABSTRACT This paper investigates the role of Confucius Institutes (CIs) as a form of China's cultural diplomacy and their impact on international trade, particularly exports. Using a gravity model, we analyze data from 1990 to 2019 across countries, finding that the presence of CIs significantly boosts China's exports.
Renjing Chen, Wei Jin, Tangrui Yang
wiley   +1 more source

Brokering Localization: Country‐Based Pooled Funds in Humanitarian Assistance

open access: yesPublic Administration and Development, EarlyView.
ABSTRACT This article analyzes Country‐Based Pooled Funds (CBPFs) to identify types of brokerage models and their effects on localization. CBPFs are intermediaries in the aid chain connecting donors to implementers such as the United Nations, international non‐governmental organizations (INGOs) and national NGOs (NNGOs). This paper analyzes four of the
Maryam Zarnegar Deloffre
wiley   +1 more source

Characterization of Structure, Properties, and Energetic Performance of a 1:1 Ammonium Dinitramide‐3,4‐Diaminofurazan Cocrystal

open access: yesPropellants, Explosives, Pyrotechnics, EarlyView.
Ammonium dinitramide (ADN) and 3,4‐Diaminofurazan (DAF) form a 1:1 energetic cocrystal. We report its crystal structure and spectroscopic signature and evaluate thermal stability, decomposition behavior, hygroscopicity, and combustion properties. Propellant performance calculations benchmark the material against guanylurea dinitramide (GuDN) and ...
Peter Schultz   +2 more
wiley   +1 more source

Russia and its neighbours: East or West? [PDF]

open access: yes, 2008
As ‘Europe’ becomes more diverse, the countries that were formerly part of the USSR face new choices. One of the most fundamental is whether they identify with the economic and military institutions of the ‘West’, such as NATO and the European Union, or ...
McAllister, I., White, S.
core   +1 more source

Home - About - Disclaimer - Privacy