Iskanje po katalogu digitalne knjižnice

Opis: The identification of the most influential nodes has been a vibrant subject of research across the whole of network science. Here we map this problem to structured evolutionary populations, where strategies and the interaction network are both subject to change over time based on social inheritance. We study cooperative communities, which cheaters can invade because they avoid the cost of contributions that are associated with cooperation. The question that we seek to answer is at which nodes cheaters invade most successfully. We propose the weighted degree decomposition to identify and rank the most influential invaders. More specifically, we distinguish two kinds of ranking based on the weighted degree decomposition. We show that a ranking strategy based on negative-weighted degree allows to successfully identify the most influential invaders in the case of weak selection, while a ranking strategy based on positive-weighted degree performs better when the selection is strong. Our research thus reveals how to identify the most influential invaders based on statistical measures in dynamically evolving cooperative communities.
Ključne besede: theoretical biology, evolution, agent-based modeling, complex system, network science, evolutionary game theory
Objavljeno v DKUM: 26.02.2025; Ogledov: 0; Prenosov: 4
Celotno besedilo (3,95 MB)
Gradivo ima več datotek! Več...

Opis: Over the past 20 years, the first author and numerous collaborators have attempted to introduce computer-based laboratory exercises in science, particularly in biology classes. While working with secondary and post-secondary students, it was realised that it was possible to simultaneously develop cross-cutting competencies that bridged several key competences of the European framework of eight key competences for lifelong learning. These were (a) Collecting, analysing, and organising information; (b) Communication of ideas; (c) Planning and organising activities; (d) Working with others in teams; (e) The use of mathematical ideas and techniques; (f) Problem solving; and (g) The use of technology. When inquiry and problem-solving strategies are used, student achievement is much higher compared to explanatory and expository labs.
Ključne besede: biology education, computer based laboratory, key competences, laboratory work, science education
Objavljeno v DKUM: 25.09.2024; Ogledov: 0; Prenosov: 2
Povezava na datoteko

Opis: After the appearance of the first smartphones in 2007 and shortly thereafter, tablets became not only useful communication tools, but also objects that function as life organisation units. However, although they are ubiquitous, their actual and potential role in biology education has not been sufficiently explored. The objectives of the survey were to investigate the recent use of smartphones in the last two grades of Slovenian comprehensive school by 14- to 15-year-old students, their satisfaction with them for educational purposes, and the perceived impact on the quality of schoolwork in biology classes. Based on the responses of 313 lower secondary school students, we can conclude that by the end of compulsory education, almost all of them have used smartphones and tablets for educational purposes to some extent, even if the reported use in different school subjects is low. Based on structural equation modelling, which examines the influence of the constructs of support, perceived usability, perceived ease of use, attitudes, and perceived pedagogical impact on the quality of smartphone-based schoolwork, it can be concluded that only perceived pedagogical impacts and perceived usability impacted quality, leading to the conclusion that additional efforts should be made to explore their full potential and the gaps that should be addressed through formal education. Leaving students to their own devices is the worst solution, resulting in a permanent lack of skills, such as the ability to select and interpret information provided through the media.
Ključne besede: attitudes, biology education, quality of schoolwork, secondary school students, smartphones, tablets
Objavljeno v DKUM: 05.06.2024; Ogledov: 136; Prenosov: 22
Celotno besedilo (1,60 MB)
Gradivo ima več datotek! Več...

Opis: Bacterial cellulose (BC) is a macromolecule with versatile applications in medicine, pharmacy, biotechnology, cosmetology, food and food packaging, ecology, and electronics. Although many bacteria synthesize BC, the most efficient BC producers are certain species of the genera Komagataeibacter and Novacetimonas. These are also food-grade bacteria, simplifying their utilization at industrial facilities. The basic principles of BC synthesis are known from studies of Komagataeibacter xylinus, which became a model species for studying BC at genetic and molecular levels. Cellulose can also be of plant origin, but BC surpasses its purity. Moreover, the laboratory production of BC enables in situ modification into functionalized material with incorporated molecules during its synthesis. The possibility of growing Komagataeibacter and Novacetimonas species on various organic substrates and agricultural and food waste compounds also follows the green and sustainable economy principles. Further intervention into BC synthesis was enabled by genetic engineering tools, subsequently directing it into the field of synthetic biology. This review paper presents the development of the fascinating field of BC synthesis at the molecular level, seeking sustainable ways for its production and its applications towards genetic modifications of bacterial strains for producing novel types of living biomaterials using the flexible metabolic machinery of bacteria.
Ključne besede: acetic acid bacteria, bacterial cellulose, sustainable production, agricultural waste, food waste, genetic engineering, synthetic biology, biomaterial, Komagataeibacter, Novacetimonas
Objavljeno v DKUM: 28.03.2024; Ogledov: 279; Prenosov: 53
Celotno besedilo (5,82 MB)
Gradivo ima več datotek! Več...

Opis: There is no doubt any more that virtual worlds are suitable for school environment. It was shown by various researchers that they can contribute in supplying students with additional information, help them to visualise subjects, respond with answer on demand or even in some cases supplement the real materials. Based on the real experience, the virtual field trail Walk on Maribor Island was developed for biology and natural science classes in lower secondary school. The trail is presented through eight exercises that differentiate not only in theme, but also in difficultness, fun, background idea etc. In spring 2011, 133 eighth grade students worked on the virtual field trail during the biology class. After the work on exercises, students were asked to analyse the exercises regarding the level of difficultness, level of interest and level of proficiency. The main aim of the study was to present the tendency in biology virtual field trips that should be taken into consideration before the development of new exercises.
Ključne besede: education, biology teaching, field trip, field work
Objavljeno v DKUM: 19.12.2017; Ogledov: 1731; Prenosov: 103
Celotno besedilo (919,81 KB)
Gradivo ima več datotek! Več...