Delayed Antarctic melt season reduces albedo feedback

Antarctica’ s response to climate change varies greatly both spatially and temporally.Surface melting impacts mass balance and also lowers surface albedo.We use a 43-year record(from 1978 to 2020) of Antarctic snow melt seasons from space-borne microwave radiometers with a machine-learning algorithm to show that both the onset and the end of the melt season are being delayed.Granger-causality analysis shows that melt end is delayed due to increased heat flux from the ocean to the atmosphere at m...     

Caution needed when interpreting muscle activity patterns during extremely low pedaling cadence

Dear editor,We noticed recent research that has just been published in Journal of Sport and Health Science(JSHS),comparing the muscular activity patterns in 1-and 2-legged cycling by Park and Caldwell.1 The authors reported that changes in muscle activities with 1-legged pedaling are due to a variety of changes in mechanical aspects of the pedaling motion,including altered crank torque patterns within the crank cycle,decreased pelvis stability,and the need for increased knee and ankle stiffness during the upstroke.The experiment was welldesigned and the discussion was fascinating.However,the testing protocol does not support the significance of the project,as stated in the first sentence of the abstract,“One-legged pedaling is of interest to elite cyclists and clinicians.”Their testing was conducted at 30 revolutions per min(rpm)and 30 watts(W),and both are too low for any kind of mechanical demand for cycling,either competitive sports or rehabilitation.The preferred cadences of experienced cyclists are approximately 85-95 rpm,whereas the most economic cadences are approximately 55-60 rpm.     

Multi-region calcium imaging in freely behaving mice with ultra-compact head-mounted fluorescence microscopesOA

To investigate the circuit-level neural mechanisms of behavior, simultaneous imaging of neuronal activity in multiple cortical and subcortical regions is highly desired. Miniature head-mounted microscopes offer the capability of calcium imaging in freely behaving animals. However, implanting multiple microscopes on a mouse brain remains challenging due to space constraints and the cumbersome weight of the equipment.Here, we present TINIscope, a Tightly Integrated Neuronal Imaging microscope opti...     

Shanghai： the Next Destination for New Media Art？ Urbanized Landscape.＂ 2008 Shanghai eART

Sthis event has attracted wide attention from home and labroad, for it was the first time that China hosted such a large scale festival for e-art where new creations by both foreign artists and Chinese artists were on display.     

比赛心理攻势下运动员行为预测

结合洛特社会学习理论中的行为潜能、期望、强化价值、心理情景4个要素,从比赛威慑、情感瓦解、分化团队、摧毁荣誉心理几个方面对运动员的行为进行预测,以期为进一步提高运动训练质量提供参考。     

Influence of a horizontal approach on the mechanical output during drop jumps

This study investigated the influence of a horizontal approach to mechanical output during drop jumps. Participants performed drop jumps from heights of 15, 30, 45, and 60 cm with zero, one, two, and three approach steps. The peak summed power during the push-off phase changed quadratically across heights (6.2 +/- 0.3, 6.7 +/- 0.4, 6.4 +/- 0.4, and 6.0 +/- 0.4 kW, respectively) driven by the ankle joint response. Summed peak power was 10% greater with an approach attributed to the knee joint response. Downward phase dorsiflexion (31%), knee flexion (35%), and peak vertical force (32%) increased with drop heights. Vertical approach force (22%) increased, while knee flexion (11%) and downward duration (17%) decreased. An approach may improve drop jump training for explosive tasks.     

Pharmacokinetic study with N-Ile1-Thr2-63-desulfato-r-hirudin in rabbits by means of bioassay

INTRODUCTION Hirudin, a naturally occurring polypeptide from salivary glands of medicinal leech (Hirudo Medici-nalis) and an important effective component of tradi-tional Chinese medicine Shui Zhi, has proven to be a highly selective direct thrombin inhibitor (Markwardt, 1994). Currently, in China recombinant-hirudin has been developed by DNA recombination technique and is undergoing extensive preclinical and clinical evaluation. Over the past decade, much effort in our lab was devote…     

At the Interface between Ink and Conception——An interview with Chinese modern artist Li Gang

Ink and wash painting, or Chinese Shui-mo painting, traditionally hinges on concepts and techniques of brushstrokes and freehand style. However, Li Gang peels those concepts and techniques off from his paintings, making concrete images of birds, flowers and landscapes fade.Only traces of water and ink, which are irregular variations in a regular array, infuse changes, agility and rhythm into a lifeless piece of medium.