Charles Darwin discovers that the theory of the species＇ creation by a miraculous being has reached a double impasse, due to the science ＂speech＂ evolution. There is an expositive impasse （it can＇t explain some f...Charles Darwin discovers that the theory of the species＇ creation by a miraculous being has reached a double impasse, due to the science ＂speech＂ evolution. There is an expositive impasse （it can＇t explain some facts any more） and a communication-comprehensive impasse （within its limits, some facts are not communicable or understandable）. In order to endorse his theory of evolutionism, Darwin develops an argumentative communicating science based on two axes： the facts and the axiomatics. His communicating science follows the next structure： （1） a relation with the starting thesis is established; （2） some evidence are promoted; （3） as the base of the evidence, a motivation is emphasized; （4） as a reason, an axiomatics is assigned to this base; and （5） finally, the facts and the quantifiers are explained by valid conclusions.展开更多
In this paper, the urban brand image as the starting point, the analysis of the urban problems facing the current urbanization process, analyze the phenomenon of brand image in the shaping and dissemination of propose...In this paper, the urban brand image as the starting point, the analysis of the urban problems facing the current urbanization process, analyze the phenomenon of brand image in the shaping and dissemination of proposed dissemination of subject and object of the brand image, discusses the city brandsignificance of the image of the construction and management. Aimed at analysis of the city＇s image, to improve our city brand image building, and the spread of attention.展开更多
Editor＇s comments The human mutation rate how often new changes appear in the DNA--is fundamental to understanding many aspects of medical genetics and human evolutionary genetics. But it is low, and has therefore b...Editor＇s comments The human mutation rate how often new changes appear in the DNA--is fundamental to understanding many aspects of medical genetics and human evolutionary genetics. But it is low, and has therefore been difficult to measure. In the past, scientists could only estimate it approximately, either by observing how often mutant phenotypes appeared, or by comparison of humans and closely related species, such as chimpanzee, where many mutations could accumulate but the time period was uncertain. Now, a new study supported by the NSFC in China and The Royal Society in the UK reports the first direct measurement of the human mutation rate at the individual letters （ nucleotides or bases） of DNA. This was possible because new （ next ）-generation sequencing technology is much more powerful than the methods available previously. The work was published in the lead- ing journal Currerzt Biology on 15th September 2009. The results were reported in the news by Nature, Science and the BBC , as well as in more than 20 Chinese newspapers and radio stations after the work first appeared online on 27th August. It was also one of the research highlights in Nature on 3rd September, which commented ＂ This direct measurement of the human mutation rate should help researchers to refine evolutionary dating and better understand the source of genetic disease＇. From the work, researchers could estimate that everyone has around 200 new mutations in their genome ; as the authors said, ＂we are all mutants＂. The ability to reliably measure rates of DNA mutation means we can begin to ask how mutation rates vary between different regions of the genome and perhaps also between different individuals.展开更多
文摘Charles Darwin discovers that the theory of the species＇ creation by a miraculous being has reached a double impasse, due to the science ＂speech＂ evolution. There is an expositive impasse （it can＇t explain some facts any more） and a communication-comprehensive impasse （within its limits, some facts are not communicable or understandable）. In order to endorse his theory of evolutionism, Darwin develops an argumentative communicating science based on two axes： the facts and the axiomatics. His communicating science follows the next structure： （1） a relation with the starting thesis is established; （2） some evidence are promoted; （3） as the base of the evidence, a motivation is emphasized; （4） as a reason, an axiomatics is assigned to this base; and （5） finally, the facts and the quantifiers are explained by valid conclusions.
文摘In this paper, the urban brand image as the starting point, the analysis of the urban problems facing the current urbanization process, analyze the phenomenon of brand image in the shaping and dissemination of proposed dissemination of subject and object of the brand image, discusses the city brandsignificance of the image of the construction and management. Aimed at analysis of the city＇s image, to improve our city brand image building, and the spread of attention.
文摘Editor＇s comments The human mutation rate how often new changes appear in the DNA--is fundamental to understanding many aspects of medical genetics and human evolutionary genetics. But it is low, and has therefore been difficult to measure. In the past, scientists could only estimate it approximately, either by observing how often mutant phenotypes appeared, or by comparison of humans and closely related species, such as chimpanzee, where many mutations could accumulate but the time period was uncertain. Now, a new study supported by the NSFC in China and The Royal Society in the UK reports the first direct measurement of the human mutation rate at the individual letters （ nucleotides or bases） of DNA. This was possible because new （ next ）-generation sequencing technology is much more powerful than the methods available previously. The work was published in the lead- ing journal Currerzt Biology on 15th September 2009. The results were reported in the news by Nature, Science and the BBC , as well as in more than 20 Chinese newspapers and radio stations after the work first appeared online on 27th August. It was also one of the research highlights in Nature on 3rd September, which commented ＂ This direct measurement of the human mutation rate should help researchers to refine evolutionary dating and better understand the source of genetic disease＇. From the work, researchers could estimate that everyone has around 200 new mutations in their genome ; as the authors said, ＂we are all mutants＂. The ability to reliably measure rates of DNA mutation means we can begin to ask how mutation rates vary between different regions of the genome and perhaps also between different individuals.
