49 research outputs found
Design and Nationalism in China
This PhD research investigates the role that design is playing in Chinese nationalism through three deep-dive case studies: China’s national design policy, Huawei smartphones and design awards in China. It argues that while the Chinese government and consumers are chasing the same nationalist goal, they focus on different facets of design: the strategic role of design in realising the government’s nationalist agenda of industrial transformation, and the symbolic role of designed objects in consumers’ nationalist sentiments. This research contributes to the literature of design and nationalism by highlighting the multifaceted and evolving role of design in Chinese nationalism
Transformation of hexagonal Lu to cubic LuH single-crystalline films
With the recent report of near ambient superconductivity at room temperature
in the N-doped lutetium hydride (Lu-H-N) system, the understanding of cubic
Lu-H compounds has attracted worldwide attention. Generally, compared to
polycrystal structures with non-negligible impurities, the single-crystalline
form of materials with high purity can provide an opportunity to show their
hidden properties. However, the experimental synthesis of single-crystalline
cubic Lu-H compounds has not been reported thus far. Here, we developed an easy
way to synthesize highly pure LuH single-crystalline films by the
post-annealing of Lu single-crystalline films (purity of 99.99%) in the H
atmosphere. The crystal and electronic structures of films were characterized
by X-ray diffraction, Raman spectroscopy, and electrical transport.
Interestingly, Lu films are silver-white and metallic, whereas their
transformed LuH films become purple-red and insulating, indicating the
formation of an unreported electronic state of Lu-H compounds possibly. Our
work provides a novel route to synthesize and explore more single-crystalline
Lu-H compounds
Flexible but Refractory Single-Crystalline Hyperbolic Metamaterials
The fabrication of flexible single-crystalline plasmonic or photonic
components in a scalable way is fundamentally important to flexible electronic
and photonic devices with high speed, high energy efficiency, and high
reliability. However, it remains to be a big challenge so far. Here, we have
successfully synthesized flexible single-crystalline optical hyperbolic
metamaterials by directly depositing refractory nitride superlattices on
flexible fluoro phlogopite-mica substrates with magnetron sputtering.
Interestingly, these flexible hyperbolic metamaterials show dual-band
hyperbolic dispersion of dielectric constants with low dielectric losses and
high figure-of-merit in the visible to near-infrared ranges. More importantly,
the optical properties of these nitride-based flexible hyperbolic metamaterials
show remarkable stability under either heating or bending. Therefore, the
strategy developed in this work offers an easy and scalable route to fabricate
flexible, high-performance, and refractory plasmonic or photonic components,
which can significantly expand the applications of current electronic and
photonic devices.Comment: 15 page
Improving the Accuracy of Density-Functional Theory Calculation: The Statistical Correction Approach
Case report: A rare case of left ventricular noncompaction in two Chinese siblings with becker muscular dystrophy caused by deletion of exons 10 to 12 in the DMD gene
BackgroundBecker muscular dystrophy (BMD) is an inherited X-linked recessive condition resulting from mutations of the DMD gene encoding dystrophin. Left ventricular noncompaction (LVNC) is a rare cardiomyopathy morphologically characterized by abnormal myocardial trabeculae and deep recesses in the left ventricle. LVNC in BMD patients has only rarely been reported.Case reportIn the present study, we identified a deletion mutation in exons 10 to 12 (EX10_12 del) of the DMD gene (reference sequence NM_004006.2) in two Chinese siblings with BMD and LVNC by high throughput targeted next-generation sequencing (NGS) and quantitative polymerase chain reaction (qPCR). The proband was a 22-year-old man admitted with dyspnea, abdominal distention, and polyserositis. It is noteworthy that both the proband and his younger brother manifested progressive muscular atrophy and creatine kinase (CK) elevation. Light and electron microscopy examination of muscle biopsies showed the typical features of dystrophinopathies. Cardiac magnetic resonance imaging and echocardiography demonstrated that both brothers had an enlarged left ventricle, LVNC, and reduced left ventricular ejection fraction. Finally, the proband underwent heart transplantation at age 26 with an event-free follow-up over 4 years post-transplantation.ConclusionThis case further enriches our knowledge of the symptoms, genotype, cardiac performance, management, and prognosis of BMD patients complicated by LVNC. It is recommended that early comprehensive cardiac evaluation should be considered for patients with BMD to exclude LVNC, as this may have a significant impact on their prognosis
Electron correlation vs. stabilization: A two-electron model atom in an intense laser pulse
We study numerically stabilization against ionization of a fully correlated
two-electron model atom in an intense laser pulse. We concentrate on two
frequency regimes: very high frequency, where the photon energy exceeds both,
the ionization potential of the outer {\em and} the inner electron, and an
intermediate frequency where, from a ``single active electron''-point of view
the outer electron is expected to stabilize but the inner one is not. Our
results reveal that correlation reduces stabilization when compared to results
from single active electron-calculations. However, despite this destabilizing
effect of electron correlation we still observe a decreasing ionization
probability within a certain intensity domain in the high-frequency case. We
compare our results from the fully correlated simulations with those from
simpler, approximate models. This is useful for future work on ``real''
more-than-one electron atoms, not yet accessible to numerical {\em ab initio}
methods.Comment: 8 pages, 8 figures in an extra ps-file, submitted to Phys. Rev. A,
updated references and shortened introductio
Environmental, Social and Governance Performance of Chinese Multinationals: A Comparison of State- and Non-State-Owned Enterprises
The purpose of this research is to empirically investigate the effect of internationalization on the environmental, social, and governance (ESG) performance of Chinese state-owned enterprises (SOEs) and non-SOEs. The study employed an updated panel dataset (6238 firm-year observations) of Chinese multinationals from the period 2010–2019. The initial findings of the study reveal that Chinese multinationals perform better in terms of environmental and governance scores. It suggests that international market forces deal with enhancing ecological problems and concerns of stakeholders. However, results are insignificant when the social performance of multinationals is analyzed. On the other hand, multinational non-SOEs outperformed their counterparts in terms of environmental and governance performance. The findings of the paper are robust regarding the use of proxies of internationalization and endogeneities