Electrical futures past

Futurist writing about technology emerged in the late 19th century at the same time as new kinds of electrical technology were making utopian futures seem practically attainable. Electrical writers and novelists alike thus borrowed from the popular "science" fiction of Jules Verne, Edward Bellamy and others to try to create self-fulfilling prophecies of a future in which electrical gadgets and machines met all major practical needs of civilization. To the extent that many parts of our world are populated by the hardware that they forecast, they succeeded in their goal.     

Functional analysis of helicase and three tandem HRDC domains of RecQ in Deinococcus radiodurans

RecQ is a highly conserved helicase necessary for maintaining genome stability in all organisms. Genome comparison showed that a homologue of RecQ in Deinococcus radiodurans designated as DR1289 is a member of RecQ family with unusual domain arrangement： a helicase domain, an RecQ C-terminal domain, and surprisingly three HRDC domain repeats, whose function, however, remains obscure currently. Using an insertion deletion, we discovered that the DRRecQ mutation causes an increase in gamma radiation, hydroxyurea and mitomycine C and UV sensitivity. Using the shuttle plasmid pRADK, we complemented various domains of the D. radiodurans RecQ （DRRecQ） to the mutant in vivo. Results suggested that both the helicase and helicase-and-RNase-D-C-terminal （HRDC） domains are essential for complementing several phenotypes. The complementation and biochemical function of DRRecQ variants with different domains truncated in vitro suggested that both the helicase and three HRDC domains are necessary for RecQ functions in D. radiodurans, while three HRDC domains have a synergistic effect on the whole function. Our finding leads to the hypothesis that the RecF recombination pathway is likely a primary path of double strand break repair in this well-known radioresistant organism.     

The basic tastants in aversion conditioning: Evidence for sensory preconditioning and not potentiation

In Experiment 1, a potentiation paradigm was used to test the relative influence of odor and taste with two 2 basic tastants (i.e., salt and sweet) in conditioned aversion learning. Experiment 1 showed that aversions to tastants (salt or sweet presented in a manner by which it could be tasted) were established only in subjects trained with the tastant, not the odor (i.e., salt or sweet presented in a manner by which it could not be tasted). Experiment 2 demonstrated, with a sensory preconditioning procedure, that the expression of an aversion to tastants was dependent on previous tastant experience prior to odor aversion training. These results suggest that while subjects can smell salt and sweet solutions, these odors are neither sufficient nor necessary for the expression of a conditioned tastant aversion.     

如何创新和加强基层企业党建工作

多年来,企业各级党组织企业党建工作在服务生产经营、推动企业改革、发展方面始终发挥着不可替代的作用。在新的形势下,企业的党建工作面临着许多新情况、新问题、新挑战,我们必须全面贯彻落实科学发展观。坚持与时俱进,不断创新企业党建工作,保持党的先进性,才能更好地发挥党组织政治核心作用。引领企业快速发展。本文就如何用创新思路加强企业的党建工作进行论述。     

现代旅游服务业复合型技能人才培养模式的构建

构建现代旅游服务业复合型技能人才培养模式,要始终围绕现代旅游服务业市场,立足为企业服务,满足学生的就业需要,走工学结合、校企合作的路子。通过组建旅游职业教育集团,成立旅游学校专家教学委员会,实施"双千互进"工程,开展订单培养等方式,可以实现高效、互利、共赢的人才培养。     

中央民族大学：网络教学推广模式探索

网络环境下的教与学在提高教育教学质量和效益、培养学习者学习能力等方面得到了教育领域的普遍认可。然而高校中网络教学的推广过程不是一蹴而就的,来自政策、技术、教学等多方面的问题都制约着网络教学的发展。教师作为教学的主导者在网络教学中面临的挑战尤为突出,观念、技术水平、教学实际、评价机制、知识产权等一系列问题成为了教师开展网络教学的重重障碍。     

中国西南喀斯特旅游竞争态势研究

在分析总结竞争相关理论的基础上,将西南喀斯特旅游的竞争要素分为基础性竞争要素、提高性竞争要素和可持续性竞争要素,竞争特点具有替代性一互补性;以此为基础建立了西南喀斯特旅游竞争力指标体系,并对云贵桂三省区的喀斯特旅游进行了实证分析,得出了广西的喀斯特旅游竞争力大于云南和贵州,云贵竞争力大致相当,以云南稍强的结论。     

坚持以德治校 彰显学校文化的德育特色

在国家的现代化建设中，职业教育承载着培养数以亿计的高素质劳动者的重任。因此，职业学校必须坚持正确的办学方向，确立“德育为首”的素质教育方针，进一步开拓创新，全力打造学校文化特色，培育适应中国特色社会主义建设需要的合格人才，同时实现学校的跨越式发展。