A tale of two cities’ university rankings: comparing Hong Kong and Singapore

Hong Kong and Singapore were former British colonies, have a predominant Chinese population and value. They began to develop quickly in the late 1960s, become financial hubs of the world in the 21st century. This paper reviews the tertiary education development of the two cities, particularly on the perspective of university rankings. It first elaborates about the emergence of university rankings, and the reason why it becomes a growing exercise, and who would be the benefactors of these exercises. Then it examines the performance of universities of the two cities in the international university ranking systems, makes a general assessment about the relative merits of the higher education systems in both cities. The paper requests ranking comparisons on the detailed items rather than just the sums, and argues that universities in the two cities are on par.     

A microfluidic device for uniform-sized cell spheroids formation,culture, harvesting and flow cytometry analysis

Culture of cells as three-dimensional (3D) aggregates, named spheroids, possesses great potential to improve in vitro cell models for basic biomedical research. However, such cell spheroid models are often complicated, cumbersome, and expensive compared to conventional Petri-dish cell cultures. In this work, we developed a simple microfluidic device for cell spheroid formation, culture, and harvesting. Using this device, cells could form uniformly sized spheroids due to strong cell–cell interactions and the spatial confinement of microfluidic culture chambers. We demonstrated cell spheroid formation and culture in the designed devices using embryonic stem cells, carcinoma cells, and fibroblasts. We further scaled up the device capable of simultaneously forming and culturing 5000 spheroids in a single chip. Finally, we demonstrated harvesting of the cultured spheroids from the device with a simple setup. The harvested spheroids possess great integrity, and the cells can be exploited for further flow cytometry assays due to the ample cell numbers.     

儒家价值观的现代意义

与西文基督教伦理根源于对“上帝”的绝对信仰不同,儒家价值观的根基在于与天道合一的人之“仁心本性”,而由此开出的仁、义、礼、智、诚(信)儒家“五常”,是为儒家伦理美德的恒常原则,最终又落实到具体应用的礼制规范层面.从“心性”基础层和“五常”中间层来看,儒家伦理具有普世伦理的意义;而从最外表的礼制规范层面来说,儒家伦理须因时制宜,因革损益,以适应时代与社会的变迁与需求.儒家价值观,对解决伴随科技与知识突飞猛进而日益凸显的价值失落、道德失范问题势必有所帮助,对现代人们的人伦日用仍不失指导意义.     

Flavor avoidance learning based on missing calories but not on palatability reduction

Avoidance of a target flavor can be produced by providing rats with a highly nutritious solution of 20?% maltodextrin (20?%Malto) in some sessions and a 3?% maltodextrin (3?%Malto) solution containing the target flavor in intermixed sessions. Since 20?%Malto is both more nutritious and more palatable than 3?%Malto, flavor avoidance could arise because the flavor signals either a reduction in calories or reduced palatability, or both. Pilot testing established that rats strongly preferred 3?%Malto plus 0.1?% saccharin to both unflavored 3?%Malto and unflavored 20?%Malto. The two main experiments tested whether the palatability difference, which the pilot data had suggested was larger than the difference between 20?%Malto and 3?%Malto, could produce flavor avoidance. In both experiments, one group of rats were given 3?%Malto plus 0.1?% saccharin on some days, intermixed with other days on which this group was given 3?%Malto plus the target flavor, almond. Neither when trained and tested under conditions of food deprivation (Experiment 1) nor when trained and tested sated (Experiment 2) did palatability reduction produce almond avoidance. In contrast, calorie reduction produced almond avoidance under both conditions. These results suggest that flavor avoidance can be produced by intermixed training involving solutions that differ in nutritious value and palatability, but not when they differ only in palatability.