Search the digital library catalog

Query:	search in
	search in
	search in
	search in
Work type:	* old and bologna study programme
Language:
Search in:
Options:	Show only hits with full text
	Reset

1 - 2 / 2

Size and shape variability of the wing in burnet moth, Zygaena ephialtes (L., 1767) (Lepidoptera: Zygaenidae)
Tina Klenovšek, Predrag Jakšić, Franc Janžekovič, 2022, original scientific article

Abstract: The burnet moth, Zygaena ephialtes (L., 1767) (Lepidoptera: Zygaenidae) is a distinctly polymorphic species of moth appearing in several color morphotypes. This study examined whether the variability of the Z. ephialtes forewing could be explained by geometric morphometric methods. The analysis included 70 male specimens from five localities in Montenegro (Plužine, Tepca, Dobrilovina, Gusinje and Rugovska Gorge), and one locality in North Macedonia (Kožuf Mountain) belonging to the subspecies Zygaena ephialtes pannonica Holik, 1937 and Zygaena ephialtes istoki Silbernagel, 1944, respectively, collected between 1981 to 2018. The forewing outline and the aposematic color pattern formed by five spots were analyzed separately. Neither forewing size nor forewing spots pattern size exhibited interpopulation heterogeneity. Size variation of the basal spot was independent from the rest. Considering the forewing outline shape, the apical portion was the most variable and different among populations. Two morphological groups were recognized: a group with a narrower pointed forewing (samples: Kožuf Mountain, Rugovska Gorge and Tepca), and a group with a wider forewing with a blunt apex (Plužine, Gusinje). Neither the outline or the spots pattern of the forewing supported the distinction between the subspecies Z. e. pannonica and Z. e. istoki.
Keywords: aposematic coloration, Balkan Peninsula, geographical variability, geometric morphometrics, wing pattern
Published in DKUM: 04.02.2025; Views: 0; Downloads: 6
Full text (601,01 KB)
This document has many files! More...

Solar irradiance stability factors
Borut Jereb, 2024, original scientific article

Abstract: In the field of renewable energies, the logistical intricacies of production, as well as the use and storage of photovoltaic energy, have become critical issues. In addition to sheer quantity, the stability of this type of energy is a crucial factor in ensuring the reliability and consistency of power generation. This paper defines Solar Irradiance Stability Factors (SISFs) as indicators complementing electricity production. When planning solar energy production in each geographical area, both the quantity and stability of solar irradiance are necessary for exploitation and determining the quality of solar irradiance. While the average production of solar energy per unit area in each time interval is a widely used parameter in daily practice, the observation of the amplitude of solar irradiance and its influence on energy production in the observed time interval is currently still rare. The SISFs defined in this article are new metrics that mainly depend on the meteorological variability in an area, and the observed time intervals should be in the range of seconds, minutes, or even hours. Larger time intervals are not helpful for the stability of solar irradiance in energy production and logistics from the source to the destination. They provide a complementary and more accurate measure of how suitable a particular geographical area is for producing solar energy.
Keywords: solar irradiance, stability metrics, photovoltaic energy, meteorological variability, geographical area
Published in DKUM: 23.09.2024; Views: 0; Downloads: 42
Full text (2,63 MB)

Search done in 0.02 sec.