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1. Cohesion and Coherence According to Halliday and Hasan (1976: 4), cohesion is relations of meaning that exist within the text and that define it as a text. Cohe- sion occurs where the interpretation of some element in the discourse is dependent on that of another. Grammar and lexis are two means to realize the goal of cohesion. In other words, there are grammatical co- hesion and lexical cohesion. Coherence refers to the relationships, which link the meanings of utterances in a discourse … 相似文献
2.
YAN Jun 《中国科学院院刊(英文版)》2011,25(3)
This article elucidates the background and significance of astronomy, overviews the important progress over the past decade, and points out the main scientific problems for world astronomy. Based on a comparison between China＇s astronmical facilities, existing and in planing, and the major international facilities, the author proposes some strategies for promoting China＇s astronomy. 相似文献
3.
Emotions are an integral component of all human activities, including human–computer interactions. This article reviews literature on the theories of emotions, methods for studying emotions, and their role in human information behaviour. It also examines current research on emotions in library and information science, information retrieval and human–computer interaction, and outlines some of the challenges and directions for future work. 相似文献
4.
《Endeavour》2019,43(3):100697
In 2019, the world scientific community celebrates the 110th anniversary of the death of Nikolai Vasilevich Sorokin (1846–1909), an eminent Russian biologist. On this occasion, this paper reviews the life and work of Sorokin, who was known for many important scientific breakthroughs, particularly in botany, mycology, and microbiology. Drawing upon Sorokin’s publications and unpublished papers from archives, this account traces his key educational influences and the development of his research interests, research-related travels, contributions to the Russian movement in women’s higher education, and his key publications, particularly his four-volume treatise on plant parasites. 相似文献
5.
《中国专利与商标》2006,(4)
It is a relatively common phenomenon to limit technical features with parameter range in patent claims. It is argued in this article that the parameter range should be distinctly divided into single parameter range and whole parameter range depending on the different mode and function of limitation. Each and every parameter in a single parameter range may independently achieve a technical effect, and limit one embodiment alone; while a single parameter in the whole parameter range cannot independently achieve any technical effect, and the set of parameters as a whole within the parameter range limit a technical feature. Discrimination between the single parameter range and the whole parameter range has a bearing on the assessment of novelty and inventiveness. Owing to the absence of such discrimination of parameter range, the provisions of the current Guidelines for Examination on novelty and inventiveness of the claims relating to parameter range are not applicable to the circumstance of whole parameter range. 相似文献
6.
Andrew Willden 《中国科学院院刊(英文版)》2015,(1):50-51
<正>Mutualisms—relationships where by two organisms live in tandem with one another,each providing a service to the other—are among the most interesting and complex relationships in nature.These kinds of relationships are generally considered cooperative interactions,whereby each of the organisms incurs substantial cost in trading services with its partner in order for each of them to gain some benefit and increase their chances of survival and evolutionary fitness.While 相似文献
7.
This article examines the digital divide in terms of access and the cultural use purposes of the Internet in Finland, the United Kingdom, and Greece. The analysis is based on data from Finnish, British, and Greek sections of Eurobarometer collected in 2013 (N = 3,009). Separate measures for class and status are applied in the analysis. The findings indicate that both access to and use of the Internet for cultural purposes are affected by a number of interdependent factors, whose effects and strengths vary significantly among the countries. 相似文献
8.
Contemporary ICTs such as speaking machines and computer games tend to create illusions. Is this ethically problematic? Is it deception? And what kind of “reality” do we presuppose when we talk about illusion in this context? Inspired by work on similarities between ICT design and the art of magic and illusion, responding to literature on deception in robot ethics and related fields, and briefly considering the issue in the context of the history of machines, this paper discusses these questions through the lens of stage magic and illusionism, with the aim of reframing the very question of deception. It investigates if we can take a more positive or at least morally neutral view of magic, illusion, and performance, while still being able to understand and criticize the relevant phenomena, and if we can describe and evaluate these phenomena without recourse to the term “deception” at all. This leads the paper into a discussion about metaphysics and into taking a relational and narrative turn. Replying to Tognazzini, the paper identifies and analyses two metaphysical positions: a narrative and performative non-dualist position is articulated in response to what is taken to be a dualist, in particular Platonic, approach to “deception” phenomena. The latter is critically discussed and replaced by a performative and relational approach which avoids a distant “view from nowhere” metaphysics and brings us back to the phenomena and experience in the performance relation. The paper also reflects on the ethical and political implications of the two positions: for the responsibility of ICT designers and users, which are seen as co-responsible magicians or co-performers, and for the responsibility of those who influence the social structures that shape who has (more) power to deceive or to let others perform. 相似文献
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10.
Concept,Characteristics and Future of Cold-type Wheat 总被引：1，自引：0，他引：1
Zhang Songwu 《中国科学基金》2007,21(1):51-57
11.
《国家科学评论(英文版)》2014,(4)
<正>he year 2014 may prove to be a major turning point in China’s development of world-class science and innovation system.At the mid-term juncture of China’s Medium-and Long-Term Program(MLP)for Science and Technology(ST)development,the Ministry of Science and Technology conducted a comprehensive review and assessment 相似文献
12.
Kirsten Martin 《The Information Society》2016,32(1):51-63
The goal of this article is to examine the strategic choices of firms collecting consumer data online and to identify the roles and obligations of the actors within the current network of online tracking. In doing so, the focus shifts from placing the onus on individuals to make an informed choice, to justifying the roles and responsibilities of firms when gathering, aggregating, and using consumers' interests or behavior online. Firms online are uniquely positioned to undercut or to respect privacy expectations within three possible roles: as a member of a supply chain of information traders, within a network of surveillance online, and as an arm of law enforcement. These firms benefit from aggregating and analyzing consumer data and have an associated responsibility to not only minimize the harm to consumers but also to enact change where the firm is in the most knowledgeable and powerful position. 相似文献
13.
《普罗米修斯》2012,30(4):249-266
ABSTRACTThe discourse of openness has proved to be a very powerful instrument for promoting new research policies and the (neoliberal) reforms of higher education in all so-called ‘advanced economies’. It has triggered positive democracy-, transparency-, and accountability-related associations when used in the context of politics, fair resource distribution when used in the sphere of public service, and free access to information and knowledge when used in the field of science and higher education. At the same time, international research shows that university autonomy is increasingly being attacked, reduced, and marginalized by the same policies. Power instances outside academia impose new criteria, such as ‘accountability,’ ‘performance,’ ‘quality assurance,’ and ‘good practice.’ They also impose ideas about what good research is, which scientific method is to be prioritized, and what good data are. The process of the de-professionalization, polarization, and proletarianization of the academic profession is increasingly affecting academia. However, none of this has much in common with the open-access discourse. The purpose of this paper is to illustrate how this discussion applies to Sweden. Courses, forces, and discourses of the national research infrastructure development policy in general, and qualitative data preservation policy in particular, are described and deliberated. 相似文献
14.
Martin Hilbert 《The Information Society》2014,30(2):127-143
This article asks whether the global process of digitization has led to noteworthy changes in the shares of the amount of text, images, audio, and video in worldwide technologically stored and communicated information content. We empirically quantify the amount of information that is globally broadcast, telecommunicated, and stored (1986–2007) and assess the evolution of the respective content shares. Somewhat unexpectedly, it turns out that the transfer from analog to digital has not led to toward increasing shares of media-rich audio and video content, despite vastly increased bandwidth. First, there is a certain inertia in the evolution of content, which seems to stick to stable proportions independent of its technological medium (be it analog vinyl and VHS tapes, or digital CDs and hard disks). Second, the relative share of text and still images actually captures a larger portion of the total amount than before the digital age. Text merely represented 0.3% of the (optimally compressed) bits that flowed through global information channels in 1986 but grew to almost 30% in 2007. On another level, we are seeing an increasing transition of text and images from one-way information diffusion networks (like newspapers) to digital storage and two-way telecommunications networks, where they are more socially embedded. Both tendencies are good news for big-data analysts who extract intelligence from easily analyzable text and image data. 相似文献
15.
Byungchae Jin 《Research Policy》2019,48(1):385-400
This study investigates whether country-level technological disparities influence individual scientists’ choice of research agenda and, if so, how the effect of country-level technological disparities on individuals’ research activities differs before and after technology commercialization. To address these research questions, we use research proceedings published from the International Electric Vehicle Symposium (EVS) from 1990 to 2009. We find that a country’s technological capabilities tend to prevent its scientists from studying electric vehicles (defined as a disruptive technology) but encourage them to study hybrid vehicles (defined as a sustaining technology) before electric and hybrid vehicles are launched in the automobile market. We also find that a country’s technological capabilities do not subsequently help its scientists shift their research activities to the technologies that have received positive initial feedback from automobile markets. 相似文献
16.
Volker Mosbrugger 《中国科学院院刊(英文版)》2004,(2)
The research project between the Nanjing Institute of Geology and Paleontology, CAS (NIGPAS), the Research Center of Paleontology, Jilin University, the Geological Survey No.1, Xinjiang and the Institute of Geology, University of Tubingen deals with the Mesozoic biota and stratigraphy of the Junggar Basin, located in the Xinjiang Autonomous Uygur Region in Northwest China. 相似文献
17.
Outcome-based contracts (OBC) in information technology outsourcing have attracted much attention, but literature is relatively scarce on this topic. Though firm theories prefer hierarchy as the most protective form of governance for such transactions, the practice moves forward with many hybrid governance structures underpinned by automation and digital transformation technologies. The objective of this paper is to develop a conceptual framework that explains the preference for inter-firm arrangements in OBCs and exhibits the capabilities of these technologies in mitigating contract inefficiencies. The proposed framework narrows the gap in the literature for a concurrent view of the latitudinal (ex-post, ex-ante) and longitudinal (reputation) dimensions of the contract. We represent the OBC as a concurrent stochastic game in a probabilistic model checker. Testing of our propositions revealed that these technology assets are complementary and joint ownership is desirable under reputation effects, reputation transfers take place between the contracting parties in the same direction, and continuous reallocation of ownership is required to maintain joint ownership. Rapid technological advancement and industry maturity can gravitate the transaction towards common ownership. The reputation function using Fermi probability distribution in our model is a novel performance measure for the industry. 相似文献
18.
Florian Szücs 《Research Policy》2018,47(7):1256-1266
We evaluate the impact of the EC's Seventh Framework Programme, a large-scale research subsidy programme, on the innovation activities of subsidized firms, with a particular regard to industry–university partnerships. Using matching and difference-in-difference estimation, we find a positive effect on a range of innovation indicators. The number of project participants in general and university participants in particular positively affect performance, suggesting knowledge spillovers between project members. Research centres, on the other hand, do not exert positive externalities. We also find that the benefits of collaborating with universities are amplified by their academic quality. 相似文献
19.
BackgroundXylanases and β-d-xylosidases are the most important enzymes responsible for the degradation of xylan, the second main constituent of plant cell walls.ResultsIn this study, the main extracellular xylanase (XYL I) and β-xylosidase (BXYL I) from the fungus Penicillium janczewskii were purified, characterized and applied for the hydrolysis of different substrates. Their molecular weights under denaturing and non-denaturing conditions were, respectively, 30.4 and 23.6 kDa for XYL I, and 100 and 200 kDa for BXYL I, indicating that the latter is homodimeric. XYL I is highly glycosylated (78%) with optimal activity in pH 6.0 at 65°C, while BXYL I presented lower sugar content (10.5%) and optimal activity in pH 5.0 at 75°C. The half-lives of XYL I at 55, 60 and 65°C were 125, 16 and 6 min, respectively. At 60°C, BXYL I retained almost 100% of the activity after 6 h. NH4+, Na+, DTT and β-mercaptoethanol stimulated XYL I, while activation of BXYL I was not observed. Interestingly, XYL I was only partially inhibited by Hg2 +, while BXYL I was completely inhibited. Xylobiose, xylotriose and larger xylooligosaccharides were the main products from xylan hydrolysis by XYL I. BXYL I hydrolyzed xylobiose and larger xylooligosaccharides with no activity against xylans.ConclusionThe enzymes act synergistically in the degradation of xylans, and present industrial characteristics especially in relation to optimal activity at high temperatures, prolonged stability of BXYL I at 60°C, and stability of XYL I in wide pH range. 相似文献
20.
《普罗米修斯》2012,30(3):323-339
This paper studies the evolution of the photovoltaics industry in Australia, Germany and Japan taking a comparative perspective. A modification of the sectoral innovation system framework is used to discuss: knowledge and technologies, actors and interactions, institutions and funding, development of markets and technological structure, as a way to understand the changes. In the process of transition from niche to mass production, national players have specialised in different activities, and the institutions’ building block has been a key determinant. In the case of Australia, it is also the least developed area which ultimately exposes the country to losing its innovation benefits. 相似文献