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The overview of lithobiomorph centipedes (Chilopoda, Lithobiomorpha) from caves of Slovenia
Anja Kos, Teo Delić, Ivan Kos, Peter Kozel, Slavko Polak, Maja Zagmajster, 2023, izvirni znanstveni članek

Opis: Centipedes of temperate regions can be found in various habitats, including forest litter, soil or caves. Slovenia, situated in the Northwestern Balkans, has rich centipede fauna, with one of the earliest scientific descriptions of a cave centipede, Lithobius stygius Latzel, 1880, from Postojnska jama. Many lithobiomorph species have been reported from Slovenian caves, but the data on their occurrence are scattered in the literature or public collections, and several specimens have even remained unexamined. Here we present the overview of lithobiomorph centipedes found in Slovenian caves. Altogether, 21 lithobiomorph species were found in 160 localities. The majority of the records, 319 out of 410, are published for the first time. Only three species are considered exclusively subterranean species, L. stygius, L. zveri and Eupolybothrus obrovensis, while other species are surface dwellers. The potential explanation of surface species presence in caves is discussed. We comment on cases of unresolved taxonomical status and present suggestions for further research needed to resolve them. Even though lithobiomorph centipedes often occur in caves, their role and importance in subterranean habitats remain to be studied.
Ključne besede: biodiversity, Eupolybothrus obrovensis, Lithobius stygius, Lithobius zveri, subterranean
Objavljeno v DKUM: 19.04.2024; Ogledov: 37; Prenosov: 0
.pdf Celotno besedilo (2,33 MB)
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Coastal fish fauna in the Cystoseira s.l. algal belts : experiences from the Northern Adriatic Sea
Lovrenc Lipej, Danijel Ivajnšič, Valentina Pitacco, Domen Trkov, Borut Mavrič, Martina Orlando-Bonaca, 2023, izvirni znanstveni članek

Opis: Cystoseira s.l. forests are recognised as important habitats which host diverse coastal fish assemblages. Many fish species use such habitats as feeding, breeding, and nursery grounds. Since the coastal fish community depends on the availability of dense macroalgal belts, the decline of these habitats in the Mediterranean Sea also affects the density of coastal fish species. We studied the coastal fish assemblage in Cystoseira s.l. forests in three consecutive years 2019–2021 in the Gulf of Trieste (Adriatic Sea). Data on coastal fish fauna were collected by visual counts conducted by SCUBA diving. Data on algal cover and habitat types were obtained by recording with a video camera. Similarities and differences in the fish community were analysed in terms of habitat and substrate preferences. A total of 34 species were recorded in Cystoseira forests. The results of the present study show that the different algal cover and associated depth gradient have different effects on the fish assemblage in coastal waters, affecting species composition and abundance. For many species, particularly labrids and sea breams, there is a decreasing temporal trend in frequency of occurrence and density. However, fish community trends can be used as a good “proxy” to evaluate the algal belt status. Our results indicate that rapid conservation and restoration actions are needed to stem the decline of Cystoseira s.l. forests.
Ključne besede: Cystoseira s.l. forests, fish assemblage, fish biodiversity, habitat preference, macroalgal belt, Mediterranean Sea
Objavljeno v DKUM: 19.04.2024; Ogledov: 32; Prenosov: 1
.pdf Celotno besedilo (2,85 MB)
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Antlion larvae localize long distant preys by a mechanism based on time diference
Vanessa Martinez, David Sillam-Dussès, Dušan Devetak, Vincent Lorent, Jan Podlesnik, 2024, izvirni znanstveni članek

Opis: Pit building antlions Euroleon nostras have been submitted to artifcial cues in order to delineate their faculty to localize a prey. Series of propagating pulses in sand have been created from an extended source made of 10 piezoelectric transducers equally spaced on a line and located at a large distance from the pit. The envelope of each pulse encompasses six oscillations at a carrier frequency of 1250 Hz and up to eight oscillations at 1666 Hz. In one set of experiments, the frst wave front is followed by similar wave fronts and the antlions respond to the cue by throwing sand in the opposite direction of the wave front propagation direction. In another set of experiments, the frst wave front is randomly spatially structured while the propagation of the wave fronts inside the envelope of the pulse are not. In that case, the antlions respond less to the cue by throwing sand, and when they do, their sand throwing is more randomly distributed in direction. The fnding shows that the localization of vibration signal by antlions are based on the equivalent for hearing animals of interaural time diference in which the onset has more signifcance than the interaural phase diference.
Ključne besede: Euroleon nostras, localization, phase time diference, onset time diference, sand-borne vibrations
Objavljeno v DKUM: 18.04.2024; Ogledov: 16; Prenosov: 0
.pdf Celotno besedilo (1,80 MB)
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Review of bioplastics characterisation by terahertz techniques in the view of ensuring a circular economy
Andreja Abina, Tjaša Korošec, Uroš Puc, Aleksander Zidanšek, 2023, pregledni znanstveni članek

Opis: The increasing scarcity of natural resources, worsening global climate change, environmental degradation, and rising demand for food are forcing the biotechnology and plastics industries to seek and apply circular economy models that would lead to a sustainable transition in the production and use of bioplastics. Circular economy models can improve the economic productivity of bio-based plastics and have a positive impact on the environment by reducing conventional plastic waste and the consumption of petrochemical feedstocks for plastic production. In addition, some agricultural wastes that have the potential to be used as bioplastics can be reused. Terahertz (THz) systems are already used in the plastics and rubber industries for non-destructive testing, detection, imaging, and quality control. Several reports have highlighted the potential applications of THz spectroscopy and imaging in polymer analysis and plastics characterisation. This potential is even greater with chemometric methods and artificial intelligence algorithms. In this review, we focus on applications that support the transformation of the biotechnology sector to the circular economy, particularly via the transition from conventional plastics to bioplastics. In this review, we discuss the potential of THz systems for the characterisation and analysis of bioplastics and biopolymers. The results of previous studies on biopolymers in the THz frequency range are summarised. Furthermore, the potential of using artificial intelligence approaches such as machine learning as advanced analytical methods in THz spectroscopy and imaging, in addition to the conventionally used chemometric methods, is discussed. The results of this review highlight that THz technology can contribute to closed technological circles in important areas of biotechnology and the related plastics and rubber industries.
Ključne besede: terahertz spectroscopy, terahertz imaging, circular economy, biopolymer, biotechnology, bioplastics
Objavljeno v DKUM: 16.04.2024; Ogledov: 81; Prenosov: 0
.pdf Celotno besedilo (5,14 MB)
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Development and validation of the "Mentoring for effective teaching practicum instrument"
Mateja Ploj Virtič, Andre Du Plessis, Andrej Šorgo, 2023, izvirni znanstveni članek

Opis: In the context of improving the quality of teacher education, the focus of the present work was to adapt the Mentoring for Effective Primary Science Teaching instrument to become more universal and have the potential to be used beyond the elementary science mentoring context. The adapted instrument was renamed the Mentoring for Effective Teaching Practicum Instrument. The new, validated instrument enables the assessment of trainee teachers' perceived experiences with their mentors during their two-week annual teaching practicum at elementary and high schools. In the first phase, the original 34-item Mentoring for Effective Primary Science Teaching instrument was expanded to 62 items with the addition of new items and items from the previous works. All items were rephrased to refer to contexts beyond primary science teaching. Based on responses on an expanded instrument received from 105 pre-service teachers, of whom 94 were females in their fourth year of study (approx. age 22-23 years), the instrument was reviewed and shortened to 36 items classified into six dimensions: personal attributes, system requirements, pedagogical knowledge, modelling, feedback, and Information and Communication Technology due to outcomes of Principal Component and Confirmatory Factor analyses. All six dimensions of the revised instrument are unidi-mensional, with Cronbach alphas above 0.8 and factor loadings of items above 0.6. Such an instrument could be used in follow-up studies and to improve learning outcomes of teaching practice. As such, specific and general recommendations for the mentee, mentors, university lecturers, and other stakeholders could be derived from the findings to encourage reflection and offer suggestions for the future.
Ključne besede: mentoring, teacher education, teaching practicum
Objavljeno v DKUM: 15.04.2024; Ogledov: 65; Prenosov: 2
.pdf Celotno besedilo (2,39 MB)
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Oppressed species can form a winning pair in a multi-species ecosystem
Attila Szolnoki, Matjaž Perc, 2023, izvirni znanstveni članek

Ključne besede: cyclic dominance, alliance, biodiversity
Objavljeno v DKUM: 15.04.2024; Ogledov: 70; Prenosov: 2
.pdf Celotno besedilo (3,15 MB)
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Extended matrix norm method : applications to bimatrix games and convergence results
Burhaneddin İzgi, Murat Özkaya, Nazım Kemal Üre, Matjaž Perc, 2023, izvirni znanstveni članek

Opis: In this paper, we extend and apply the Matrix Norm (MN) approach to the nonzero-sum bimatrix games. We present preliminary results regarding the convergence of the MN approaches. We provide a notation for expressing nonzero-sum bimatrix games in terms of two matrix games using the idea of separation of a bimatrix game into two different matrix games. Next, we prove theorems regarding boundaries of the game value depending on only norms of the payoff matrix for each player of the nonzero-sum bimatrix game. In addition to these, we refine the boundaries of the game value for the zero/nonzero sum matrix games. Therefore, we succeed to find an improved interval for the game value, which is a crucial improvement for both nonzero and zero-sum matrix games. As a consequence, we can solve a nonzero-sum bimatrix game for each player approximately without solving any equations. Moreover, we modify the inequalities for the extrema of the strategy set for the nonzero-sum bimatrix games. Furthermore, we adapt the min-max theorem of the MN approach for the nonzero-sum bimatrix games. Finally, we consider various bimatrix game examples from the literature, including the famous battle of sexes, to demonstrate the consistency of our approaches. We also show that the repeated applications of Extended Matrix Norm (EMN) methods work well to obtain a better-estimated game value in view of the obtained convergence results.
Ključne besede: game theory, nonzero sum game, bimatrix game, matrix norms, battle of sexes, convergence
Objavljeno v DKUM: 15.04.2024; Ogledov: 56; Prenosov: 2
.pdf Celotno besedilo (838,66 KB)
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In the search for the ideal mentor by applying the "Mentoring for effective teaching practice instrument"
Mateja Ploj Virtič, Andre Du Plessis, Andrej Šorgo, 2023, izvirni znanstveni članek

Opis: The study aims to explore and analyse the perceived experiences of Slovenian pre-service teachers with their mentors during their teaching practicum, by using the "Mentoring for effective teaching practice instrument (METPI)". Conclusions were based on 105 responses using paper and pencil, collected from Slovenian preservice teachers in their 4th year of study. The initial set of 62 items was shortened to 36 items for inclusion in the models. From two concurrent SEM models, it was concluded that students found their experiences related to Hudson's five-factor model, consisting of personal attributes of their mentor, modelling, pedagogical knowledge, system requirements and feedback, to be satisfactory, while their experience pertaining to Information and Communication Technology as a new, additional factor with reference to their mentor, was unsatisfactory. Several recommendations are made related to the dimensions, especially pertaining to Information and Communication Technology (ICT) tools.
Ključne besede: ICT, mentoring pre-service teachers, METPI, teacher professional knowledge, teaching practicum
Objavljeno v DKUM: 15.04.2024; Ogledov: 73; Prenosov: 2
.pdf Celotno besedilo (1,42 MB)
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Analiza geometrije lijakastih pasti v pesku
Tina Klenovšek, Dušan Devetak, Jan Podlesnik, 2023, objavljeni strokovni prispevek na konferenci

Opis: Volkci lijakarji so žuželke, katerih ličinke v pesku gradijo pasti v obliki lijaka za lov plena. Naklon lijaka in sipanje peska proti dnu lijaka plenu otežujeta pobeg, zato je oblika lijaka ključnega pomena za uspeh pri lovu. Različne vrste volkcev lijakarjev lahko gradijo različno oblikovane pasti. V raziskavi Devetak in sodelavci (2020) smo proučevali povezavo med geometrijo pasti in lastnostmi peščenega substrata. Pasti smo 3D skenirali z laserskim čitalnikom in izdelali 3D modele pasti, ki smo jih uporabili za opis oblike z meritvami kotov in za analizo variabilnosti pasti z metodami geometrijske morfometrije. Ugotovili smo, da substrat z manjšo granulacijo ali večjim deležem finega peska omogoča gradnjo kompleksnejših pasti s strmejšimi stenami, saj ima višji maksimalni kot stabilnosti. Oblika pasti je torej odvisna od strukture substrata in v heterogenem habitatu omogoča sobivanje različnih vrst volkcev z različnimi preferencami glede substrata.
Ključne besede: geometrijska morfometrija, analiza oblike, ličinke volkcev, granulacija peska
Objavljeno v DKUM: 15.04.2024; Ogledov: 59; Prenosov: 3
.pdf Celotno besedilo (605,95 KB)
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Review of Antlions (Insecta: Neuroptera: Myrmeleontidae) in North Macedonia
Dušan Devetak, Ana Nahirnić, Predrag Jakšić, Vesna Klokočovnik, Tina Klenovšek, Davide Badano, Jan Podlesnik, 2023, izvirni znanstveni članek

Opis: We present the state of knowledge on the family Myrmeleontidae occurring in North Macedonia based on published records, museum specimens and new samples, and provide a comprehensive species list. North Macedonia represents only 3.9% of the area of the Balkan Peninsula but harbours 19 species belonging to 14 antlion genera, i.e., 61% of the peninsular fauna. We report collection localities, literature records and biological data for each species. Three species, Nemoleon poecilopterus, Neuroleon assimilis and Myrmeleon inconspicuus, are reported for the first time in North Macedonia. The genus Nemoleon Navás is also reported for the first time in the country.
Ključne besede: Myrmeleontidae, checklist, distribution, new records, Balkan Peninsula
Objavljeno v DKUM: 15.04.2024; Ogledov: 61; Prenosov: 2
.pdf Celotno besedilo (497,47 KB)
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