Gromadzenie zbiorów w Bibliotece Głównej Uniwersytetu Marii Curie-Skłodowskiej w Lublinie – problemy i kierunki rozwoju

The paper attempts to present some problems of work organization at the Acquisition and Collection Development Department of the MCS University Main Library. This article discusses the changes effected in the Department organizational structure over the last 20 years. The acquisition strategy has been discussed together with the forms of cooperation with readers in relation to the selection of new titles.Artykuł nie posiada streszceznia w języku polskim

Komputeryzacja procesów gromadzenia zbiorów – z doświadczeń Biblioteki Głównej Uniwersytetu Marii Curie-Skłodowskiej w Lublinie

Collecting library resources is the basic task of every library, which translates into the quality of resources and user satisfaction. The article discusses the course of computerization of collection processes in the Main Library of the Maria Curie-Skłodowska University in Lublin. It was presented how the It tools used have changed since the 1990s and their impact on the organization of the work in the Department of Acquisition and Collection Development. In order to document the activities related to the discussed process, the following methods were used: document analysis and case study. The described experiences of the unit's employees may prove useful to other libraries.Gromadzenie zbiorów to podstawowe zadanie każdej biblioteki przekładające się na jakość zasobów i zadowolenie użytkowników. w artykule omówiono przebieg komputeryzacji procesów gromadzenia w Bibliotece Głównej Uniwersytetu Marii Curie-Skłodowskiej w Lublinie. przedstawiono, jak zmieniały się stosowane narzędzia informatyczne, począwszy od lat 90. XX wieku oraz ich wpływ na organizację pracy Oddziału Gromadzenia i Uzupełniania zbiorów. w celu udokumentowania działań związanych z omawianym procesem wykorzystano metody: analizy dokumentów oraz case study. Opisane doświadczenia pracowników jednostki mogą okazać się przydatne dla innych bibliotek

Cognitive Properties of Approval Voting : an Experimental Approach

The paper summarizes two series of experiments demonstrating the cognitive properties of approval voting. The former series is devoted to mental processes induced in decision makers who use the method of approval voting. Based on cognitive effort, the use of choice strategies is presented in this paper. The observations of respondents show that most of them use relatively effortless strategy of eliminating alternatives and attributes. Few respondents use more sophisticated methods. The other series of experiments analyses the number of alternatives chosen in approval voting. It appears that the average number is not constant, even for similar votes but it depends on the subject of voting. The number of chosen alternatives and the subjective significance of the scope of voting are negatively or positively correlated in the case of special votes. The analyzed experiments show that the cognitive properties of approval voting have a diverse structure. (original abstract

Effect of ph on aqueous phenylalanine studied using a 265-nm pulsed light-emitting diode

Recently, we described the characteristics and application of a 265-nm AlGaN light-emitting diode (LED) operated at 1-MHz repetition rate, 1.2-ns pulse duration, 1.32-μW average power, 2.3-mW peak power, and approximately 12-nm bandwidth. The LED enables the fluorescence decay of weakly emitting phenylalanine to be measured routinely in the condensed phase, even in dilute solution. For a pH range of 1-11, we find evidence for a biexponential rather than a monoexponential decay, whereas at pH 13, only a monoexponential decay is present. These results provide direct evidence for the dominance of two phenylalanine rotamers in solution with a photophysics closer to the other two fluorescent amino acids, tyrosine and tryptophan, than has previously been reported. Although phenylalanine fluorescence is difficult to detect in most proteins because of its low quantum yield and resonance energy transfer from phenylalanine to tyrosine and tryptophan, the convenience of the 265-nm LED may well take protein photophysics in new directions, for example, by making use of this resonance energy transfer or by observing phenylalanine fluorescence directly in specific proteins where resonance energy transfer is inefficient