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"Ying, Qi"
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Matching visibility and performance : a standing challenge for world-class universities
World-class universities (WCU) are regarded as cornerstone institutions of any academic system and imperative to develop a nation?s competitiveness in the global knowledge economy. Visibility and performance are among the most watched concepts in relation to develop WCUs, but remain complicated in nature and with no agreed upon definitions. Existing literature have focused on how to raise universities? prestige, status, impact and rankings in the global and regional arena on the one hand, and how to enhance universities? quality, efficiency, effectiveness and academic output on the other. However, whether visibility is a legitimate indicator of performance, or vice versa, is yet to be answered. This book provides insights of developing academic excellence from global, national and institutional perspectives, and intends to stimulate discussion on how universities can be?globally visible and locally engaged? and how visibility and performance can be integrated and balanced in practice.
Book
Including Children with Developmental Disabilities in the Equation During this COVID-19 Pandemic
Amidst the ongoing novel Coronavirus disease pandemic, children with developmental disabilities warrant specific attention to minimise having disproportionate consequences. These children are especially vulnerable to the effects of the pandemic due to (1) Greater healthcare needs, (2) Dependency on community-based services and (3) Mental health concerns. Healthcare professionals, public health systems and the society needs to come together to advocate for these children by optimising access to healthcare and community intervention services, promoting mental well-being and caregiver welfare. The consequences of missed present-day opportunities might only be evident in the years to come in these children. Hence, despite the prolonged pandemic, with consequent limitations in availability of resources, children with developmental disabilities should continue to be supported.
Journal Article
How world-class universities affect global higher education : influences and responses
World-class universities, commonly recognized as global research universities or flagship universities, are cornerstone institutions embedded in any academic system and play an important role in developing a nation?s competitiveness in the global knowledge economy. The development of world-class universities is high on the policy agenda of various stakeholders across the globe. In the past few years, an increasing number of nations, regions and higher education institutions in both developed and developing countries have joined the same race for academic excellence and have adopted a range of development strategies and implemented various reforms. From a comparative perspective, How World-Class Universities Affect Global Higher Education intends to provide an in-depth picture of excellence initiatives and relevant policies adopted in various nations and regions, and to reflect opportunities and challenges of developing excellence.
Book
Stereoselective synthesis of medium lactams enabled by metal-free hydroalkoxylation/stereospecific 1,3-rearrangement
Rearrangement reactions have attracted considerable interest over the past decades due to their high bond-forming efficiency and atom economy in the construction of complex organic architectures. In contrast to the well-established [3,3]-rearrangement, [1,3] O-to-C rearrangement has been far less vigorously investigated, and stereospecific [1,3]-rearrangement is extremely rare. Here, we report a metal-free intramolecular hydroalkoxylation/[1,3]-rearrangement, leading to the practical and atom-economical assembly of various valuable medium-sized lactams with wide substrate scope and excellent diastereoselectivity. Moreover, such an asymmetric cascade cyclization has also been realized by chiral Brønsted acid-catalyzed kinetic resolution. In addition, biological tests reveal that some of these medium-sized lactams displayed their bioactivity as antitumor agents against melanoma cells, esophageal cancer cells and breast cancer cells. A mechanistic rationale for the reaction is further supported by control experiments and theoretical calculations.
Journal Article
One-year simulation of ozone and particulate matter in China using WRF/CMAQ modeling system
China has been experiencing severe air pollution in recent decades. Although an ambient air quality monitoring network for criteria pollutants has been constructed in over 100 cities since 2013 in China, the temporal and spatial characteristics of some important pollutants, such as particulate matter (PM) components, remain unknown, limiting further studies investigating potential air pollution control strategies to improve air quality and associating human health outcomes with air pollution exposure. In this study, a yearlong (2013) air quality simulation using the Weather Research and Forecasting (WRF) model and the Community Multi-scale Air Quality (CMAQ) model was conducted to provide detailed temporal and spatial information of ozone (O3), total PM2.5, and chemical components. Multi-resolution Emission Inventory for China (MEIC) was used for anthropogenic emissions and observation data obtained from the national air quality monitoring network were collected to validate model performance. The model successfully reproduces the O3 and PM2.5 concentrations at most cities for most months, with model performance statistics meeting the performance criteria. However, overprediction of O3 generally occurs at low concentration range while underprediction of PM2.5 happens at low concentration range in summer. Spatially, the model has better performance in southern China than in northern China, central China, and Sichuan Basin. Strong seasonal variations of PM2.5 exist and wind speed and direction play important roles in high PM2.5 events. Secondary components have more boarder distribution than primary components. Sulfate (SO42−), nitrate (NO3−), ammonium (NH4+), and primary organic aerosol (POA) are the most important PM2.5 components. All components have the highest concentrations in winter except secondary organic aerosol (SOA). This study proves the ability of the CMAQ model to reproduce severe air pollution in China, identifies the directions where improvements are needed, and provides information for human exposure to multiple pollutants for assessing health effects.
Journal Article
Dual-phase nanostructuring of layered metal oxides for high-performance aqueous rechargeable potassium ion microbatteries
Aqueous rechargeable microbatteries are promising on-chip micropower sources for a wide variety of miniaturized electronics. However, their development is plagued by state-of-the-art electrode materials due to low capacity and poor rate capability. Here we show that layered potassium vanadium oxides, K
V
O
·nH
O, have an amorphous/crystalline dual-phase nanostructure to show genuine potential as high-performance anode materials of aqueous rechargeable potassium-ion microbatteries. The dual-phase nanostructured K
V
O
·nH
O keeps large interlayer spacing while removing secondary-bound interlayer water to create sufficient channels and accommodation sites for hydrated potassium cations. This unique nanostructure facilitates accessibility/transport of guest hydrated potassium cations to significantly improve practical capacity and rate performance of the constituent K
V
O
·nH
O. The potassium-ion microbatteries with K
V
O
·nH
O anode and K
MnO
·nH
O cathode constructed on interdigital-patterned nanoporous metal current microcollectors exhibit ultrahigh energy density of 103 mWh cm
at electrical power comparable to carbon-based microsupercapacitors.
Journal Article
وسائل النقل في الصين
يستعرض كتاب \"وسائل النقل\" الذي نشر ضمن سلسلة الصين في مائة عام عن مؤسسة بيت الحكمة عدًدا من المحاور الأساسية منها أحوال الطرق في أواخر عهد أسرة تشينغ، وسمات وسائل النقل بما فيها العربات التي يحملها الرجال، أو تلك التي تجرها الخيول، والعربات الرسمية والمحفات الشعبية التي تقل العامة من الناس، بالإضافة إلى وصف للجسور المتنوعة والسفن وأنواع الزوارق المختلفة، وحركة النقل في عصر الحكومة الوطنية لجمهورية الصين وملامح ظهور وسائل النقل الحديثة، ومنها عربات اليد والحنطور الغربي والدراجة الهوائية والسيارة التي تعمل بالمحرك، بالإضافة إلى تطور السكك الحديدية والقطارات الحديثة، والتطورات الكبيرة في صناعة السفن ووسائل النقل البحري والبواخر المتطورة.
Book
Asymmetric dearomatization catalysed by chiral Brønsted acids via activation of ynamides
Chiral Brønsted acid-catalysed asymmetric synthesis has received tremendous interest over the past decades, and numerous efficient synthetic methods have been developed based on this approach. However, the use of chiral Brønsted acids in these reactions is mostly limited to the activation of imine and carbonyl moieties, and the direct activation of carbon–carbon triple bonds has so far not been invoked. Here we show that chiral Brønsted acids enable the catalytic asymmetric dearomatization reactions of naphthol-, phenol- and pyrrole-ynamides by the direct activation of alkynes. This method leads to the practical and atom-economic construction of various valuable spirocyclic enones and 2H-pyrroles that bear a chiral quaternary carbon stereocentre in generally good-to-excellent yields with excellent chemo-, regio- and enantioselectivities. The activation mode of chiral Brønsted acid catalysis revealed in this study is expected to be of broad utility in catalytic asymmetric reactions that involve ynamides and the related heteroatom-substituted alkynes. Chiral Brønsted acid catalysis is mostly limited to the activation of imine and carbonyl moieties. Now, by direct activation of alkynes, chiral Brønsted acids have been used to enable the catalytic asymmetric dearomatization of naphthol-, phenol- and pyrrole-ynamides for the construction of various spirocyclic enones and 2H-pyrroles bearing a chiral quaternary carbon stereocentre.
Journal Article