The effect of progressively increased physical efforts on visual evoked potentials in volleyball players and non-athletes

We assessed the effect of physical effort with increasing intensity on neural activity in the visual pathway in volleyball players (n = 10) and non-athletes (n = 10). Participants performed three 10-min tests of increasing intensity on a cycle ergometer. Each participant was assigned individual workloads below the lactate threshold (40% [Vdot]O(2max)), at the lactate threshold (65-75% [Vdot]O(2max)), and above the lactate threshold (80% [Vdot]O(2max)). Four recordings of visual evoked potentials were made: pre-exercise and immediately after each of the three subsequent tests. We assessed neural activity of the visual pathway by examining the amplitude and latency of the N75, P100, and N135 components of the visual evoked potentials waveform. Pre-exercise P100 wave latency was shorter (P < 0.05) in volleyball players than in non-athletes. In non-athletes, the latency of P100 following the first and second effort (40% and 65-75% [Vdot]O(2max)) was reduced compared with pre-exercise (P < 0.01). However, P100 latency increased and P100 amplitude decreased after the third test (80% [Vdot]O(2max)) in non-athletes. In contrast, no significant changes in the latency or amplitude of visual evoked potentials were observed in the athletes in the three tests. Neural conductivity in the visual pathway after exercise might be at least partially dependent on the individual's personal training adaptation status.     

Microfluidic formulation of pectin microbeads for encapsulation and controlled release of nanoparticles

We report a method for formulation of pectin microbeads using microfluidics. The technique uses biocompatible ingredients and allows for controlled external gelation with hydrogen and calcium ions delivered from an organic phase of rapeseed oil. This method allows for encapsulation of nanoparticles into the microparticles of gel and for control of the rate of their release.     

Toward relationships-querying in document retrieval systems

A concept of end-user query language with facilities of expressing relationships between objects kept in a data base is presented. The idea of nesting these facilities in typical document system query language is shown. Special kinds of referring terms are designed. Examples of usage of the new facilities are attached.     

Distribution of the AMPD1 C34T polymorphism in Polish power-oriented athletes

The aims of this study were to determine the distribution of the AMPD1 genotype among groups of high-level Polish power-oriented athletes, and to investigate potential associations between genetic polymorphism in exon 2 of the AMPD1 gene and power-oriented athlete status. Altogether, 158 male Polish power-oriented athletes were genotyped by PCR-RFLP. The genetic control group comprised 160 unrelated male volunteers. We observed significant differences in genotype distribution when all 158 athletes (89.25% CC, 10.75% CT, 0.00% TT; P = 0.0025) were compared with controls (75.00% CC, 23.75% CT, 1.25% TT). A significant deficiency of the T allele was noted in all subgroups (short-distance runners: 5.21%, P = 0.032; short-distance swimmers: 5.56%, P = 0.031; weightlifters: 5.36%, P = 0.024) compared with controls (13.13%), while this trend was even stronger when the frequency of the T allele was compared between controls and all 158 athletes (5.38%, P = 0.0007). Our results indicate a lower frequency of the AMPD1 exon 2 T34 allele in elite Polish power-oriented athletes. Our data suggest that the C allele may help athletes to attain elite status in power-oriented sports.     

HERIe: A Web-Based Decision-Supporting Tool for Assessing Risk of Physical Damage Using Various Failure Criteria

ABSTRACT

HERIe is a web-based decision-supporting software tool to facilitate the management of collection environments by precise assessment of climate-induced risk of physical damage to vulnerable objects. The software translates the relative humidity and temperature data recorded in the environment of the analysed object into a strain history experienced by it, and estimates the risk of physical damage using selected failure criteria. As all information is pre-calculated for the user, no engagement in complex and time-consuming numerical simulations is required. HERIe is available for testing at herie.mnk.pl. Detailed information on the methodologies used by the software is available at the above website which also contains tutorial climates. The current work aims at refining HERIe by selecting the damage criteria not only from laboratory studies but also from direct monitoring damage accumulation in objects, especially using the acoustic emission method. The software has been expanded to include moisture-induced response of parchment to support managing environments in libraries and archives.     

Educational reform and the public: Two case studies of Poland and Saskatchewan (Canada)

The involvement of the public in educational reform processes in modern democratic societies primarily serves the purpose of politically legitimizing the reform agenda. This study examines the rationales implicitly or explicitly submitted to the public to explain why educational reforms in the two countries should be endorsed. Although differences in the political culture caution against a hasty comparison of the two case studies, a number of politico-economic similarities allow for a valid juxtaposition. In Poland the context of socio-political and economic renewal prompted the reformers to emphasize the human-capital model which heightened public awareness and participation in the debate surrounding the reform. Public involvement in Saskatchewan was negatively affected for mainly two reasons. First, the government evidently manipulated public input by various means and thereby appears to have predetermined the outcome. Second, the rationale for the reform, based on a free-market model, tightened the linkage between the needs of the labour market and the mandate of the schools. As a result, public interest and participation was greatly diminished.

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Zusammenfassung Die Beteiligung der Öffentlichkeit an Reformen auf dem Gebiet der Erziehung in den modernen demokratischen Gesellschaften dient hauptsächlich der politischen Legitimierung der Reformpläne. In dieser Studie werden die der Bevölkerung offen oder unterschwellig vermittelten Gründe untersucht, warum den erzieherischen Reformen in beiden Ländern zugestimmt werden sollte. Obwohl die Unterschiede in der politischen Kultur Anlaß zur Vorsicht vor einem voreiligen Vergleich der beiden Fallstudien geben, so sprechen einige wirtschaftspolitische Ähnlichkeiten für eine sinnvolle Nebeneinanderstellung. In Polen führte der Zusammenhang sozialpolitischer und wirtschaftlicher Erneuerung dazu, daß die Reformer das Modell des menschlichen Kapitals, das das öffentliche Bewußtsein und die Teilnahme an der Debatte über die Reformen verstärkte, besonders betonten. Die öffentliche Beteiligung in Saskatchewan bekam aus zwei Gründen einen negativen Beigeschmack. Erstens manipulierte die Regierung offensichtlich in verschiedener Hinsicht die Beiträge der Öffentlichkeit, und sie scheint damit das Ergebnis vorbestimmt zu haben. Zweitens stärkten die Gründe für die auf ein Modell der freien Marktwirtschaft gegründeten Reformen die Verbindungen zwischen dem Bedarf des Arbeitsmarktes und dem Mandat der Schulen. Als Folge davon reduzierte sich das öffentliche Interesse und die Beteiligung erheblich.

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Résumé La participation du public aux processus de réforme éducative dans les sociétés démocratiques modernes sert essentiellement à légitimation politique du calendrier de réforme. Cette étude examine la raison d'être soumise implicitement ou explicitement au public et analyse pourquoi les réformes éducatives doivent être adoptées dans les deux pays. Bien que les divergences de cultures politiques mettent en garde contre une comparaison hâtive des deux études de cas, certaines correspondances politico-économiques permettent une juxtaposition valide. En Pologne, le contexte de la rénovation socio-politique et économique a pressé les réformateurs à mettre en valeur le modèle de capital humain qui a rehaussé l'information et la participation du public dans le débat autour de la réforme. La participation du public dans le Saskatchewan a été entravée pour deux raisons. Premièrement, il semblerait que le gouvernement ait manipulé les investissements publics de différentes manières et qu'il ait par cela prédéterminé le résultat obtenu. Deuxièmement, la légitimité de la réforme, orientée vers un modèle de marché libre, a renforcé les liens entre les besoins du marché de l'emploi et le mandat des écoles. Par conséquent, l'intérêt et la participation du public ont été considérablement affaiblis.

     

Multimedia and interactivity in distance learning of resuscitation guidelines: a randomised controlled trial

The aim of the study was to conduct a comparative analysis of three forms of knowledge transfer online, taking into account the long-term knowledge growth rate and the satisfaction of students surveyed in respect to distance learning. The cohort of participants for this survey were students of the first degree, studying in the Emergency Medical Services. The authors created three e-learning courses in basic and advanced resuscitation procedures. The level of course participants’ satisfaction was analysed, as well as the knowledge growth rate measured three times: 7, 30 and 90 days, respectively, after finishing the course. The level of satisfaction in all the groups surveyed was comparable. The growth rate for knowledge was the highest in group C in the second and third survey, respectively (30 and 90 days after the end of the course), and a significant difference in favour of course C was demonstrated one month after finishing classes.