基于同被引分析的我国图书馆学情报学期刊关系与结构研究   总被引：1，自引：0，他引：1  

张蔓蒂  胡吉明 《情报理论与实践》2011,34(1)

本文在选取我国图书馆学情报学领域24种典型期刊的基础上,利用期刊同被引分析方法对从CNKI中检索出的1999—2009年的期刊同被引数据进行了分析,包括聚类分析、多维尺度分析和因子分析,得出了期刊的关系与结构及其在图书馆学情报学领域中的地位。  相似文献   

Comparison of methods: Passing and Bablok regression     

Bilić-Zulle L 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2011,21(1):49-52

The comparison of methods experiment is important part in process of analytical methods and instruments validation. Passing and Bablok regression analysis is a statistical procedure that allows valuable estimation of analytical methods agreement and possible systematic bias between them. It is robust, non-parametric, non sensitive to distribution of errors and data outliers. Assumptions for proper application of Passing and Bablok regression are continuously distributed data and linear relationship between data measured by two analytical methods. Results are presented with scatter diagram and regression line, and regression equation where intercept represents constant and slope proportional measurement error. Confidence intervals of 95% of intercept and slope explain if their value differ from value zero (intercept) and value one (slope) only by chance, allowing conclusion of method agreement and correction action if necessary. Residual plot revealed outliers and identify possible non-linearity. Furthermore, cumulative sum linearity test is performed to investigate possible significant deviation from linearity between two sets of data. Non linear samples are not suitable for concluding on method agreement.  相似文献   

The mathematics teacher identity of two early career mathematics teachers and the influence of their working communities on its development     

Arslan  Okan  Haser  Çiğdem  Van Zoest  Laura R. 《Journal of Mathematics Teacher Education》2022,25(4):429-452

Journal of Mathematics Teacher Education - To better understand the critical early years of teaching and teacher identity development, this study explored the mathematics teacher identity of two...  相似文献   

Student teachers’ mathematics attitudes,authentic investigations and use of metacognitive tools     

Karoline Afamasaga-Fuata’i  Lumaava Sooaemalelagi 《Journal of Mathematics Teacher Education》2014,17(4):331-368

Based on findings from a semester-long study, this article examines the development of Samoan prospective teachers’ mathematical understandings and mathematics attitudes when investigating authentic contexts and applying working mathematically processes, mental computations and problem-solving strategies to find solutions of problems. The prospective teachers had enrolled for the second time (having failed their first attempt), in the first-year mathematics methods course of a 2-year Diploma of Education (Primary) programme. The group also included those enrolled in the Diploma of Education (Early Childhood and Special Needs) programmes, who recognizing their own limited understanding of mathematics would ordinarily shy away from opportunities for improvement. Given the negative mathematical and learning experiences, this group was ideal to engage in innovative and creative approaches that would make mathematics learning more meaningful and contextual in a Samoan environment. Only data from the attitudinal questionnaires and interviews are presented in this article. Main findings have implications for teaching and learning mathematics.  相似文献   

A comparative study of wall painting materials and techniques used in fifteenth century Austria by Frederich of Villach and his followers     

Anabelle Križnar 《文物保护研究》2014,59(5):289-299

One of the most important artistic circles in the first half of the fifteenth-century in Austria was the so-called ‘Older Villach's workshop’, founded by Frederic of Villach, a painter who was considered a master of fresco technique. A technical study was made of a number of wall painting cycles by the workshop of Frederic of Villach, first, to gain a broader knowledge of the painting techniques employed, and second, to allow comparison with a further group of wall paintings in Slovenia, which are stylistically related to this workshop and have been studied previously. Of special interest were artworks attributed to Frederic's son Johannes of Ljubljana and a number of other anonymous painters that show important similarities to Frederic's works. Samples of plasters and pigments were analysed by optical microscopy, scanning electron microscopy with energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, and X-ray diffraction. An important difference in the composition of plasters was discovered between the selected artistic groups. The palette used comprised predominantly earth and other mineral pigments. The construction of the paintings from incisions and preparatory drawings to the final modelling is basically similar and shows workshop connections. The principal painting technique was a fresco. The results contribute to a wider knowledge concerning the materials and techniques employed in gothic wall paintings in the Alpine region and offer new information that can be used to inform the future conservation of these selected wall paintings.  相似文献   

Influence of regression model and incremental test protocol on the relationship between lactate threshold using the maximal-deviation method and performance in female runners     

Machado FA  Nakamura FY  Moraes SM 《Journal of sports sciences》2012,30(12):1267-1274

This study examined the influence of the regression model and initial intensity of an incremental test on the relationship between the lactate threshold estimated by the maximal-deviation method and the endurance performance. Sixteen non-competitive, recreational female runners performed a discontinuous incremental treadmill test. The initial speed was set at 7 km · h?1, and increased every 3 min by 1 km · h?1 with a 30-s rest between the stages used for earlobe capillary blood sample collection. Lactate-speed data were fitted by an exponential-plus-constant and a third-order polynomial equation. The lactate threshold was determined for both regression equations, using all the coordinates, excluding the first and excluding the first and second initial points. Mean speed of a 10-km road race was the performance index (3.04 ± 0.22 m · s?1). The exponentially-derived lactate threshold had a higher correlation (0.98 ≤ r ≤ 0.99) and smaller standard error of estimate (SEE) (0.04 ≤ SEE ≤ 0.05 m · s?1) with performance than the polynomially-derived equivalent (0.83 ≤ r ≤ 0.89; 0.10 ≤ SEE ≤ 0.13 m · s?1). The exponential lactate threshold was greater than the polynomial equivalent (P < 0.05). The results suggest that the exponential lactate threshold is a valid performance index that is independent of the initial intensity of the incremental test and better than the polynomial equivalent.  相似文献   

Testing Inequality Constrained Hypotheses in SEM Models     

Rens van de Schoot  Herbert Hoijtink  Maja Deković 《Structural equation modeling》2013,20(3):443-463

Researchers often have expectations that can be expressed in the form of inequality constraints among the parameters of a structural equation model. It is currently not possible to test these so-called informative hypotheses in structural equation modeling software. We offer a solution to this problem using Mplus. The hypotheses are evaluated using plug-in p values with a calibrated alpha level. The method is introduced and its utility is illustrated by means of an example.  相似文献   

Non-invasive methods for characterisation of printed cultural heritage     

Klementina Možina  Klemen Možina  Sabina Bračko 《Journal of Cultural Heritage》2013,14(1):8-15

The quality of a book reprint depends on several factors, e.g. paper, typesetting, reproduction of illustrations, printing and bookbinding. The quality of the 1958 and 1988 reprints of the fairytale edition from 1944 designed by the Slovenian architect Jo?e Ple?nik was studied using standard and other non-invasive testing methods, e.g. microscopic and spectroscopic techniques, sonic velocity, Young's modulus of elasticity, surface topography and image analysis. The chemical, physical and colorimetric properties of papers and typographic tonal density were analysed. The results showed that the reprints do not correspond to the originals. Some of the differences in the reprints, if compared with the original (e.g. typographic tonal density), could have been easily avoided, while others (e.g. structural and optical properties of paper) remain unavoidable, mainly due to the influence of internal and external factors on the ageing. The ageing process influences paper properties, since optical properties deteriorate in time. It has been concluded that a precise and systematic study of the properties of an old book should be performed before the preparation of a reprint. The results of the research have shown that the applied methods are useful and satisfactory for the characterisation of the paper properties and typography, and can be of use at the analysis of printing ink and illustration reproduction.  相似文献   

Towards new learning environments—Collective civic actions as learning interventions in post-Communist Belgrade     

Katarina Popović  Maja Maksimović  Aleksa Jovanović 《European Journal of Education》2018,53(3):365-376

This article focuses on the social dimension of well-being, based on a critical analysis of the way it is conceptualised in late capitalism: As the dimensions of individual state of mind and body, something that evolves in the individual realm, stressing personal responsibility and achievement of well-being as a solitary act. Then, the contemporary conceptualisation and approaches to policy making for well-being are compared with the policy of adult and youth education and learning. The perspective of a strong individual orientation, detachment from the social, community and collective aspects and efforts seem to be a common denominator. Agency is considered not only as a possibility for individuals to create and change the environment, but also as a process of active co-construction of social reality. This includes (re)connection with a community, very often through new ways of community learning, civic actions and civic activities. An analysis of how these perspectives converge in civic interventions in urban areas of Belgrade places togetherness at the core of the broader approach to well-being and learning. This article presents several examples of civic activities in urban spaces whose learning character is interpreted within the concept of public pedagogy. The examples presented prevail in the post-Communist countries because public spaces as zones of civic interventions can oppose the controlling authority and through the fight for human and civil rights represent the bottom line of togetherness and collective agency. Learning through collective civic actions thus provides new ways of understanding well-being.  相似文献   

Authors from the periphery countries choose open access more often          下载免费PDF全文

Witold Kieńć 《Learned Publishing》2017,30(2):125-131

This article analyses attitudes of academic authors toward open access (OA) and the frequency of choosing OA publication venues. The research looks particularly at differences between authors based in countries with a gross domestic product per capita less or greater than US$18,000 (called periphery and core countries, respectively). The data were obtained with an online survey sent to 107,296 scholars listed on the mailing lists belonging to De Gruyter Open from December 2015 to January 2016. A total of 1,012 responses were received. Authors from the periphery countries publish their articles in gold OA more often and they also pay OA publication fees equally often as those based in the core countries. The reasons for that are complex, involving both their preference to publish in OA and the composition of the publishing market in the periphery.  相似文献