China's space robotics for on-orbit servicing: the state of the artOA

<正>Since the pioneering deployment of Canadarm in 1981,various on-orbit servicing (OOS) concepts have been flourishing and are continuously demonstrated by space agencies worldwide[1].This novel access to extend human curiosity in space is empowered by the remarkable OOS progress achieved by missions like the Robot Technology Experiment (ROTEX),Engineering Test Satellite-Ⅶ(ETS-Ⅶ),     

Clinicopathological and immunological features of new onset kidney disease: a rare event after SARS-CoV-2 vaccinationOA

The onset of various kidney diseases has been reported after severe acute respiratory syndrome coronavirus2(SARS-CoV-2) vaccination.However,detailed clinical and pathological features are lacking.We screened and analyzed patients with newly diagnosed kidney diseases after inactivated SARS-CoV-2 vaccination in Peking University First Hospital from January 2021 to August 2021,and compared them with the reported cases in the literature.We obtained samples of blood,urine and renal biopsy tissues.Cli...     

Inhibition of Wnt activity improves peri-implantation development of somatic cell nuclear transfer embryos

Somatic cell nuclear transfer(SCNT) can reprogram differentiated somatic cells into totipotency.Although pre-implantation development of SCNT embryos has greatly improved,most SCNT blastocysts are still arrested at the peri-implantation stage,and the underlying mechanism remains elusive.Here,we develop a 3D in vitro culture system for SCNT peri-implantation embryos and discover that persistent Wnt signals block the naive-to-primed pluripotency transition of epiblasts with aberrant H3K27me3 occup...     

从语言看金庸如何塑造韦小宝

金庸塑造的众多小说人物形象中,《鹿鼎记》里的韦小宝无疑是最成功的一个,也是最复杂的一个。在韦小宝身上,可以看到我们许多人的影子,但他更是一个特立独行的、实实在在的人。拟从韦氏语言的特色来分析韦小宝的性格特征,进而管窥中国俗文化。     

回归生命的诗学——感悟“生命·实践”教育学

建立一种新的生命成长的教育,是教育学进入近现代以来一直不可或缺的紧迫任务。"生命·实践"教育学派凸显了教育学的本质意义,它是关涉生命诗性成长的诗学,它把教育导向生命的价值实现、生命的美化、生命形式的变革,诗意的"生命·实践"教育学以点化生命的教育作为教育学建构的原点。但是,"生命·实践"学派依然面对着一些挑战,比如世界的物化、社会的消费化和人的机器化;教育的规训化、生命的平庸化,以及生命教育的普世化等。     

仿生学视角下技术联盟组织间知识转移机理研究

为了探明技术联盟组织间知识转移的机理,文章尝试采用仿生学方法,构建了一个由知识菌种、知识酵母、知识媒以及进阶知识四种发酵要素组成的理论模型,透析其内部"转移发酵"的趋同、趋异和协同发酵过程,接着进行了相应的案例分析。研究结果表明,遵循"转移发酵"规律,注重各发酵要素的培育,是确保技术联盟组织间知识转移顺利进行的关键。     

教师的美德

师道不存则师德难继，师业未精则师职难尽。现时学校教育重实作而轻理论、重升学率而轻师生德性养成的状况．已令越来越多有识之士深为忧虑。本期摘选、集纳了一些近段时间的出色的教育研究文章——无系统以求点到．无关联而求精要．集英取华以飨读者，而望有助于教师之专业结构系统优化。     

对我国B2B的一些思考

从B2B的现状入手,指出中国非常需要B2B;从B2B企业的内部环境对B2B出现的问题加以分析,并提出了相关对策,最后对B2B给予了展望。     

Proteins induced by telomere dysfunction are associated with human IgA nephropathy

Aging is one of the contributing risk factors for kidney diseases. Accumulating evidence prompts the view that telomere length in kidney tissue cells is an indicator for organismal aging. Previously identified aging markers (cathelin-related antimicrobial peptide (CRAMP), stathmin, elongation factor-1α (EF-1α), and chitinase) were associated not only with telomere driven aging in mice but also with human aging and chronic diseases. This study focuses on the relationship between these biomarkers and IgA nephropathy (IgAN) progression in the Chinese population. For 260 individuals, the four markers are determined in blind datasets using direct enzyme-linked immunosorbent assay (ELISA) and immunofluorescence staining. The expression levels of CRAMP and chitinase increased in blood plasma, urine, and kidney tissues during human IgAN progression. And for the other nephropathy, such as systemic lupus erythematosus (SLE), diabetic nephropathy (DN), and focal segmental glomerulosclerosis (FSGS), there is no protein upregulation with telomere shortening. Moreover, a combination of CRAMP and chitinase can distinguish patients with IgAN from healthy individuals with 88.2%/92.5% (plasma) and 74.3%/84.2% (urine) sensitivity/specificity. These data provide the experimental evidence that telomere shortening and related inflammatory proteins are associated with human IgAN, and it could be a new direction for the disease progression study.     

教育：思想与对话（第2辑）

正在教育公平与效率‘均争论中,多数学者王张‘效率优先,兼顾公平’‘优先’二字表明,在效率和公平发生冲突时,对效率的追求应该压倒公平原则那就是说,为了效巫可以不要公平,可以偏袒一个万面这是明摆着的‘缺德’有的学者说,教育中‘效巫优先.兼顾公平’的原贝!{是从经济领域引进的,但这一原则对于教育并不完全适月’其实,发展经济也要讲道德效立优先,公平让