硫对苗期水稻根表胶膜形成的影响

通过土-砂根际盒培养试验研究了施硫(0, 30 mg·kg^-1, SO₄^2--S)对水稻苗期根表胶膜形成的影响. 结果表明,施硫显著提高ACA(乙酸钠-柠檬酸钠-抗坏血酸)浸提的24天和48天苗龄根表胶膜铁锰含量,即施硫促进水稻根表胶膜形成,但其对8天苗龄根表胶膜影响不明显. SEM-EDX观察发现,施硫导致水稻根表有更多颗粒状聚集,尤其在根的基部. 可见,硫可以通过调控水稻根表胶膜形成来影响根系对营养元素的吸收.     

How do collaborations with universities affect firms’ innovative performance? The role of “Pasteur scientists” in the advanced materials field

This article aimed to identify the effect of university-industry (U-I) collaborations on the innovative performance of firms operating in the advanced materials field, and by doing so, it proposed an original classification of the research organization partners. The main contribution resides in the estimation of the role played by collaborations with differently experienced scientists. In contrast with previous studies, whose empirical setting was the life science industry, in the advanced materials industry the most effective collaborations are not with “Star scientists”, but with “Pasteur scientists”. The latter concept was empirically tested first by the authors of this article, to deepen the present understanding of industrial heterogeneity in innovation processes and to offer new insights for the formulation of corporate innovation strategies. The results of the estimation of a negative binomial regression model applied to a sample of 455 firms active in the photocatalysis in Japan confirm the idea that engaging in research collaborations, measured as co-invention, with “Pasteur scientists” increases firms’ R&D productivity, measured as number of registered patents. In contrast, we found that firms’ collaborations with “Star scientists” exert little impact on their innovative output.     

How do Miles and Snow's strategic types differ in their knowledge assets? Evidence from Italian SMEs

This paper takes a knowledge-based view of firms and discusses the importance of linking organizational knowledge assets into corporate strategy. In order to conceptualize knowledge assets, the paper adopts the intellectual capital (IC) framework, which distinguishes three IC components: human, structural and relational capital. As regards business strategy, the paper adopts Miles and Snow's model, which identifies three strategic types of successful organizations: Defenders, Analysers and Prospectors. The paper explores the ways in which the three strategic types differ in weighting the single components of their IC. This study represents an attempt to extend the Miles and Snow typology including the aspect of knowledge assets. The link between knowledge asset management and strategy is investigated by means of three case studies conducted in Italian small and medium enterprises from the food sector. The paper argues that firms of different Miles and Snow strategic types have different mix of IC components.     

Reconstructing the internship program as a critical reflexive practice: the role of tutorship

Critical reflexivity has been acknowledged as fundamental in higher education. For facing complex situations in turbulent environments, students nowadays need not only to be taught technical knowledge, but also to be helped develop “relevant” learning for their future professional practice. In recent years, scholars have concentrated on what makes the internship experience a successful opportunity for the parties involved, and have also discussed the crucial role of a mentor/tutor in sustaining relevant and effective learning. However, the specific conditions that make tutorship successful in promoting critical reflexivity in such a boundary crossing experience need to be further explored. Aim of this paper is therefore to analyze what tutorship conditions sustain the development of critical reflexivity in internship. For this purpose, we will present the case study of an internship program run by one of the largest universities in northern Italy.     

Evaluation of Preanalytical Quality Indicators by Six Sigma and Pareto`s Principle

Preanalytical steps are the major sources of error in clinical laboratory. The analytical errors can be corrected by quality control procedures but there is a need for stringent quality checks in preanalytical area as these processes are done outside the laboratory. Sigma value depicts the performance of laboratory and its quality measures. Hence in the present study six sigma and Pareto principle was applied to preanalytical quality indicators to evaluate the clinical biochemistry laboratory performance. This observational study was carried out for a period of 1 year from November 2015–2016. A total of 1,44,208 samples and 54,265 test requisition forms were screened for preanalytical errors like missing patient information, sample collection details in forms and hemolysed, lipemic, inappropriate, insufficient samples and total number of errors were calculated and converted into defects per million and sigma scale. Pareto`s chart was drawn using total number of errors and cumulative percentage. In 75% test requisition forms diagnosis was not mentioned and sigma value of 0.9 was obtained and for other errors like sample receiving time, stat and type of sample sigma values were 2.9, 2.6, and 2.8 respectively. For insufficient sample and improper ratio of blood to anticoagulant sigma value was 4.3. Pareto`s chart depicts out of 80% of errors in requisition forms, 20% is contributed by missing information like diagnosis. The development of quality indicators, application of six sigma and Pareto`s principle are quality measures by which not only preanalytical, the total testing process can be improved.     

Knowledge space oddity: How to increase the intensity and relevance of the technological progress of European regions

This work contributes to previous research on the relationship between specific features of a regional knowledge space and the technological progress of the region. In particular, the main element of originality of this work is to have singled out the determinants of the technological progress intensity and relevance. We acknowledge the importance of knowledge assets for new knowledge production, and we identify path-dependent processes that allow a region to become increasingly competitive in terms of innovation potential. In particular, adopting an evolutionary view of regional development, we describe the regional knowledge space through four crucial characteristics: 1) technological knowledge base, 2) technological cumulativeness, 3) technological diversification, and 4) technological relatedness. We then measure to what extent each of the knowledge space’s characteristics differently affects the technological progress intensity and relevance of the region. A longitudinal study of 269 European regions over the period 1996–2012 was organized using data from REGPAT and Eurostat databases. Results show that technological relatedness affects positively both the intensity and relevance of the technological progress of European regions and that the other components of the knowledge space show a different impact on the two features of the technological progress. Finally, implications for EU policies supporting and stimulating regional technological progress are discussed.     

Overcoming feudal constraints on educational research in Spain: the impact of the CIMIE conference

ABSTRACT

Feudal structures and power relationships that Spanish universities inherited from Franco’s dictatorship have damaged the quality of educational research. However, the emergence of initiatives aimed to address these limitations have been identified. In this article, we analyze the impact of the Multidisciplinary International Conference on Educational Research (CIMIE). Specifically, we analyze how CIMIE is contributing to overcome some of the feudal constraints affecting educational research in Spain, such as fragmentation of areas of knowledge, limited international research efforts, and precarious and unstable employment situations of many researchers. Grounded in the communicative methodology of research and using mixed methods, we have conducted a longitudinal study of this research initiative (2012–2016), comprising interviews and communicative observations, analysis of documentation and quantitative data. The results show that participants understand that their involvement in CIMIE is contributing to make them feel released from the constraints of university feudalism by building solidarity networks and egalitarian relationships, and by rethinking research.     

The scientific approach to the restoration and monitoring of mural paintings at S. Girolamo Chapel – SS. Annunziata Church in Florence

The scientific approach to the restoration and monitoring of mural paintings, at S. Girolamo Chapel – SS. Annunziata Church in Florence, is reported as a fruitful example of the synergic collaboration between restorers and scientists in the planning and development of conservative interventions. Before restoration, the painting technique and the state of preservation of the pictorial cycle have been investigated firstly by close examination of the painted surfaces and then by optical and/or SEM-EDS microscopy and μFT-IR spectroscopy on appropriately selected samples. In particular, the original constituent materials and those belonging to subsequent restorations were characterized together with those originating from decay processes. In this mural painting cycle, a peculiar “fresco” technique has been used although an auxiliary binder for pigment distemper has been also employed. The use of this technique, sometimes in an improper way together with uncorrected restoration interventions, are the main responsible of the unsatisfactory state of conservation of many painted areas. Preliminary conservation trials and scientific studies were carried out to design the most convenient restoration intervention and to verify the correctness and non-invasive of the necessary operations. Special attention was devoted to cleaning procedures, continuously monitored by a physico-chemical methodology, mainly based on microinvasive, microscopic and spectroscopic investigations, to evaluate the efficiency, advantages and drawbacks of the proposed cleaning procedures and define the most appropriate ones. Finally, specific decay markers have been recognized, by a comparison of the results obtained from the detached samples with those deriving from artificially aged models, to be used for a correct future monitoring and maintenance of the wall paintings.     

More Means Worse: Asymmetric Information, Spatial Displacement and Sustainable Heritage Tourism

This paper analyses the market transformation in heritage tourism destinations when excessive tourism demand determines the emergence of a class of excursionists among visitors. Building on the approach of Keane (1997) and Shapiro (1983), some important dimensions of sustainable tourism development are highlighted. The lesser capacity of excursionists to learn the true quality of the tourist goods provides an opportunity for producers to cut back on quality. To serve high quality goods and keep up the reputation of the destination, producers need to gain a mark-up on price that might not be sustained in a competitive market. Hence the decline in ``high-paying' demand segments, increasingly substituted by visitors with lesser quality expectations, has significant consequences on the use and preservation of the heritage. The proposed formulation allows the identification of appropriate policy instruments to reverse this process.     

试论老舍作品中的女性描写

老舍说“怕写女人”,其实他对女人的描写是成功的。他的作品中两性关系题材是叙述艺术的一个重要母题。老舍作品中的一个基本思想是对父权制度的颠倒,然而这颠倒却又常常是短暂的：传统的两性之间的权力关系最终总要恢复。这一切只是为了把主要人物彻底地推向不幸,而且,恰恰是用这种原本制度的复辟对它提出了质疑,或预示着一次新的颠倒,由此暗示出这种制度正面临死亡