Principles for modernizing education     

Czesław Kupisiewicz 《Prospects》1974,4(1):11-20

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Institutional accreditation as an instrument of public relations: The case of the Poznan´ university of economics     

Przemysław Deszczyn´ski 《Higher Education in Europe》2003,28(4):461-470

In December 2000, five Polish state institutions of higher education in economics established the Foundation for the Promotion and Accreditation of Economics Programmes. Its mission, as stated in its charter, is to improve the quality of economics and management education by disseminating and supporting its best models. This mission takes on particular importance on the eve of the inclusion of Polish higher education institutions into the European Higher Education Area. This article serves as a case study based on the experience of the Poznan´ University of Economics and what it gained from its accreditation in early 2003.  相似文献   

A neural network model approach to athlete selection     

Adam Maszczyk  Adam Zając  Igor Ryguła 《Sports Engineering》2011,13(2):83-93

In order to determine the usefulness of neural models in optimisation of recruitment processes, statistical analyses were carried out on measured results of javelin throwers using a full take off. A group of 140 Polish junior javelin throwers took part in the research. In order to choose the optimum combination of model parameters the Hellwig method was used. Linear and multilayer perceptron neural models were constructed and used to calculate combinations of variables. Statistical analysis of the results showed that the linear model was not able to describe precisely the relationship between the dependent variable and independent variables for the investigated group of young javelin throwers. For the investigated group, the perceptron network with a 4-3-2-1 structure gave the best predictive relationship for sports results of the javelin throwers.  相似文献   

Characterization and provenance of seventeenth- and eighteenth-century Okinawan ceramics using X-ray based analysis     

Anya Dani  Jennifer Mass  Taro Kuranari 《文物保护研究》2014,59(5):S207-S208

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A preliminary evaluation of VEGF-A,VEGFR1 and VEGFR2 in patients with well-controlled type 2 diabetes mellitus   总被引：4，自引：0，他引：4  

Barbara RUSZKOWSKA-CIASTEK  Alina SOKUP  Maciej W. SOCHA  Zofia RUPRECHT  Lidia HA?AS  Barbara GóRALCZYK  Krzysztof GóRALCZYK  Gra?yna GADOMSKA  Danuta RO?? 《Journal of Zhejiang University. Science. B》2014,15(6):575-581

Objective

Decompensated chronic hyperglycemia often leads to late microvascular complications such as retinopathy, diabetic foot syndrome, and diabetic kidney disease. The aim of this study was to determine the concentration of vascular endothelial growth factor A (VEGF-A) and its receptors in patients with well-controlled diabetes.

Methods

The study was conducted on 31 patients with well-controlled type 2 diabetes without micro-or macroangiopathy. Thirty healthy volunteers were enrolled in a control group. Serum concentrations of VEGF-A, VEGF receptors 1 and 2 (VEGFR1 and VEGFR2), fasting glucose, and lipid profiles were measured, and the plasma concentration of glycated hemoglobin (HbA1c) was determined.

Results

No significant differences were observed between the concentration of VEGF-A, VEGFR1 or VEGFR2 in the subject group and that in the control group. Positive correlations were noted between the levels of VEGF-A, VEGFR2, and triglyceride, and there was a negative correlation between the levels of VEGFR2 and high-density lipoprotein (HDL)-cholesterol in the study group.

Conclusions

The concentrations of VEGF-A and its receptors 1 and 2 in patients with well-controlled diabetes are comparable to those of healthy individuals, which may indicate that appropriate control of glucose levels delays the occurrence of vascular complications. A negative correlation between VEGFR2 and HDL-cholesterol levels, and positive correlations between VEGF-A, VEGFR2, and triglyceride levels, suggest that lipid abnormalities occurring in diabetes may be involved in the modulation of angiogenesis.  相似文献   

Analysis of PIASA's Archival Information Center Project     

Stanisław Flis 《Slavic & East European Information Resources》2013,14(4):252-255

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Computational approaches for mining user’s opinions on the Web 2.0     

Gerald Petz  Michał Karpowicz  Harald Fürschuß  Andreas Auinger  Václav Stříteský  Andreas Holzinger 《Information processing & management》2014

The emerging research area of opinion mining deals with computational methods in order to find, extract and systematically analyze people’s opinions, attitudes and emotions towards certain topics. While providing interesting market research information, the user generated content existing on the Web 2.0 presents numerous challenges regarding systematic analysis, the differences and unique characteristics of the various social media channels being one of them. This article reports on the determination of such particularities, and deduces their impact on text preprocessing and opinion mining algorithms. The effectiveness of different algorithms is evaluated in order to determine their applicability to the various social media channels. Our research shows that text preprocessing algorithms are mandatory for mining opinions on the Web 2.0 and that part of these algorithms are sensitive to errors and mistakes contained in the user generated content.  相似文献   

The effect of peer group stability on achievements: Evidence from Poland     

Mikołaj Herbst  Aneta Sobotka  Piotr Wójcik 《European Journal of Education》2023,58(1):166-180

This article reports on a study using data from nation-wide standardised examinations in Poland. We analysed the extent to which grade 9 student achievements have depended on the stability of their peer group over the course of middle school. We controlled for the fixed effects of schools attended by the students, as well as for individual achievements prior to middle school enrolment. To mitigate the risk for endogeneity, analysis was informed by a consideration of the fact that middle schools operate in different institutional relations with nearby primary schools. This also allowed us to distinguish between the effect related to peer group stability and the one connected to the stability of the learning environment in general. The results of our analysis show that instability significantly reduces students' expected performance in mathematics and science. The impact of peer group stability on test achievements varies strongly across the student ability distribution. Very low-performing students and top performers were most affected. The average students were largely unaffected. One category of students that seems to benefit from the change when moving to middle school are students from very competitive primary schools who have average skills.  相似文献   

Sports injuries in an America's Cup yachting crew: A 4-year epidemiological study covering the 2007 challenge     

Michał Hadała  Carlos Barrios 《Journal of sports sciences》2013,31(7):711-717

Abstract

The aim of this study was to describe the injuries sustained by an America's Cup crew during eight preparatory competitions of the 32nd America's Cup 2007 and the Louis Vuitton Cup (from October 2004 to June 2007). The anatomical location, type of injury, and mechanism of injury were recorded. The injuries were categorized based on each sailor's position on the boat according to three intensities of physical demands. The injury rates per sailor and per 1000 h of competition were determined. In total, 90 injuries were registered. The overall incidence was 10 injuries per 1000 competition hours. Overuse injuries accounted for 76.6% of all lesions. The most common anatomical location of injuries was the upper limb (36.6%), followed by the upper dorsal and cervical spine (34.4%). Frequency of injury was related to the sailor's position on the boat, being higher in the group with more demanding activities (grinder, bowman, and mastman). Most injuries (67%) were sustained by this group of sailors. The most common injuries in this group were muscle contractures of the quadratus lumborum (11), trapezius (8), and rhomboid (7). There were eight cases of elbow epicondylitis, four cases of tendinopathy of the supraspinous tendon, and three cases of tendinopathy of the biceps brachii. An America's Cup yachting crew is exposed to a high risk of overuse injuries, especially those sailors whose boat position involves high-intensity activity.  相似文献   

Bipolar queries in textual information retrieval: A new perspective     

Sławomir Zadrożny  Janusz Kacprzyk  Guy De Tré 《Information processing & management》2012

A new concept of a bipolar query against collections of textual documents, i.e. in the context of information retrieval (IR), is introduced using recent developments in bipolar information modeling and bipolar database queries. Specifically, a particular approach to bipolar queries with an explicit “and possibly” type of an aggregation operator is used. An effective and efficient processing of such bipolar queries using standard IR data structures is briefly discussed. The bipolar queries proposed combine a flexibility provided by fuzzy logic with a more sophisticated representation of user preferences and intentions. This combination can make the search of vast resources of textual document, notably those available via the Internet, more intelligent.  相似文献