Post-truth public diplomacy: a detrimental trend of cross-national communication and how open societies address it

Accepted manuscrip

Making war and peace with emotion: examining the Iraq and Iran cases via presidential speech and media coverage

This study investigates emotions conveyed in US presidential speeches and media coverage regarding the Iraq War and the Iran nuclear deal during 2003 and 2015. The researchers gathered and examined news stories about the two policies, all official speeches delivered by George W Bush and Barack Obama, and opinion polls conducted during the respective six-month period in those two years. Nine discrete emotions were coded to capture the valence and volume in the speeches and news media content. The study finds that emotions appear more frequently in the Iraq discourse than in the Iran counterpart. President Bush used more negative emotions while President Obama employed more positive emotions. Emotion in the media coverage is constant and stable across the two policy periods; yet negative emotions are more prevalent than positive counterparts in the media despite distinct foreign policies. The study also examines public opinion trends toward the two policies for inferring potential linkage. This article contributes to the conceptual nexus among emotional persuasion, journalism pattern, and foreign policy-making process.Accepted manuscrip

Assessing China's news coverage and soft power in Latin America in the wake of the Belt and Road Initiative (2013–2021)

This study assesses the impact of China's mediated communication strategies implemented in Latin America from 2013 to 2021. We content-analyzed the press coverage about China in nine countries and unveiled tones, topics, and frames which were then examined further across different sources. Public sentiments toward China were gauged to infer a potential link to China's communication efforts. Overall, China's program to influence Latin American media outlets and public opinion has not resulted in substantial gains; the region's sentiment toward China actually deteriorated. There is a communication gap between Chinese and Latin American publics, which is inimical to public diplomacy.Accepted manuscrip

VLBI observations of jupiter with the initial test station of LOFAR and the nancay decametric array

AIMS: To demonstrate and test the capability of the next generation of low-frequency radio telescopes to perform high resolution observations across intra-continental baselines. Jupiter's strong burst emission is used to perform broadband full signal cross-correlations on time intervals of up to hundreds of milliseconds. METHODS: Broadband VLBI observations at about 20 MHz on a baseline of ~50000 wavelengths were performed to achieve arcsecond angular resolution. LOFAR's Initial Test Station (LOFAR/ITS, The Netherlands) and the Nancay Decametric Array (NDA, France) digitize the measured electric field with 12 bit and 14 bit in a 40 MHz baseband. The fine structure in Jupiter's signal was used for data synchronization prior to correlation on the time-series data. RESULTS: Strong emission from Jupiter was detected during snapshots of a few seconds and detailed features down to microsecond time-scales were identified in dynamic spectra. Correlations of Jupiter's burst emission returned strong fringes on 1 ms time-scales over channels as narrow as a hundred kilohertz bandwidth. CONCLUSIONS: Long baseline interferometry is confirmed at low frequencies, in spite of phase shifts introduced by variations in ionospheric propagation characteristics. Phase coherence was preserved over tens to hundreds of milliseconds with a baseline of ~700 km. No significant variation with time was found in the correlations and an estimate for the fringe visibility of 1, suggested that the source was not resolved. The upper limit on the source region size of Jupiter Io-B S-bursts corresponds to an angular resolution of ~3 arcsec. Adding remote stations to the LOFAR network at baselines up to thousand kilometers will provide 10 times higher resolution down to an arcsecond.Comment: 6 pages, 4 figures. Nigl, A., Zarka, P., Kuijpers, J., Falcke, H., Baehren, L., VLBI observations of Jupiter with the Initial Test Station of LOFAR and the Nancay Decametric Array, A&A, 471, 1099-1104, accepted on 31/05/200

Multiple G-It\^{o} integral in the G-expectation space

In this paper, motivated by mathematic finance we introduce the multiple G-It\^{o} integral in the G-expectation space, then investigate how to calculate. We get the the relationship between Hermite polynomials and multiple G-It\^{o} integrals which is a natural extension of the classical result obtained by It\^{o} in 1951.Comment: 9 page

Mechanical properties of Graphene Nanoribbons

Herein, we investigate the structural, electronic and mechanical properties of zigzag graphene nanoribbons upon the presence of stress applying Density Functional Theory within the GGA-PBE approximation. The uniaxial stress is applied along the periodic direction, allowing a unitary deformation in the range of +/- 0.02%. The mechanical properties show a linear-response within that range while the non-linear dependence is found for higher strain. The most relevant results indicate that Young's modulus is considerable higher than those determined for graphene and carbon nanotubes. The geometrical reconstruction of the C-C bonds at the edges hardness the nanostructure. Electronic structure features are not sensitive to strain in this linear elastic regime, being an additional promise for the using of carbon nanostructures in nano-electronic devices in the near future.Comment: 30 pages. J. Phys.: Condens. Matter (accepted

Berry phase manipulation in ultrathin SrRuO3_3 films

A notion of the Berry phase is a powerful means to unravel the non-trivial role of topology in various novel phenomena observed in chiral magnetic materials and structures. A celebrated example is the intrinsic anomalous Hall effect (AHE) driven by the non-vanishing Berry phase in the momentum space. As the AHE is highly dependent on details of the band structure near the Fermi edge, the Berry phase and AHE can be altered in thin films whose chemical potential is tunable by dimensionality and disorder. Here, we demonstrate that in ultrathin SrRuO$_3$ films the Berry phase can be effectively manipulated by the effects of disorder on the intrinsic Berry phase contribution to the AHE, which is corroborated by our numerically exact calculations. In addition, our findings provide ample experimental evidence for the superficial nature of the topological Hall effect attribution to the protected spin texture and instead lend strong support to the multi-channel AHE scenario in ultrathin SrRuO$_3$