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Abstract: Predicting global change mitigations based on environmental variables, like temperature and water availability, although yielding insightful hypothesis still lacks the integration of environmental responses. Physiological limits should be assessed to obtain a complete representation of a species’ fundamental niche. Detailed ecophysiological studies on the response of trees along the latitudinal gradient are rare. They could shed light on the behaviour under different light intensities and other studied traits. The forests of the Dinaric Mountains and the Carpathians represent the largest contiguous forest complexes in south-eastern Europe. In uneven-aged Carpathian (8 plots) and Dinaric Mountain (11 plots) forests, net assimilation (Amax) and maximum quantum yield (Φ) were measured for beech and fir in three predefined light intensity categories according to the indirect site factor (ISF%) obtained by the analysis of hemispherical photographs in managed and old growth forests, all located above 800 m a.s.l. The measurements were carried out under fixed environmental conditions in each light category per plot for three consecutive years. Data from the last 50-year average period from the CRU TS 4.01 dataset were used for the comparison between Amax, Φ, and climate. The highest Φ for beech were observed in the central part of the Dinaric Mountains and in the south westernmost and northwesternmost part of the Carpathians for both beech and fir, while they were highest for fir in the Dinaric Mountains in the northwesternmost part of the study area. The Φ-value of beech decreased in both complexes with increasing mean annual temperature and was highest in the open landscape. For fir in the Carpathians, Φ decreased with increasing mean annual temperature, while in the Dinaric Mountains it increased with higher temperature and showed a more scattered response compared to the Carpathians. Short-term ecophysiological responses of beech and fir were consistent to long-term radial growth observations observed on same locations. The results may provide a basis and an indication of the future response of two tree species in their biogeographical range to climate change in terms of competitiveness, existence and consequently forest management decisions.
Keywords: silver fir, beech, light response, Carpathian Mountains, Dinaric Mountains, temperature, precipitation
Published in DiRROS: 08.05.2024; Views: 22; Downloads: 284
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Abstract: Župnija Zgonik je najjužnejši izrastek goriške nadškofije v širšem kraškem zaledju tržaškega mesta. Prispevek obravnava demografske značilnosti starostnikov te župnije v dolgem 19. stoletju na osnovi treh statusov animarum. Delež starejših se je gibal okoli desetih odstotkov celotne populacije in je le polagoma naraščal, pretežno zaradi naraščanja števila starostnikov v šestdesetih letih starosti. Daleč največ starostnikov je umiralo »zaradi starosti«, pri čemer se je delež tega vzroka smrti na začetku 20. stoletja celo zopet povečal.
Published in DiRROS: 07.05.2024; Views: 47; Downloads: 28
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Abstract: We present a procedure which enables the computation and the description of structures of isotropy subgroups of the group of complex orthogonal matrices with respect to the action of $^\ast$congruence on Hermitian matrices. A key ingredient in our proof is an algorithm giving solutions of a certain rectangular block (complex-alternating) upper triangular Toeplitz matrix equation.
Keywords: isotropy groups, matrix equations, complex orthogonal matrices, Hermitian matrices, Toeplitz matrices
Published in DiRROS: 06.05.2024; Views: 54; Downloads: 28
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Abstract: Na vrhuncu napora zemalja u razvoju da uspostave Novi međunarodni ekonomski poredak, Jugoslavija je, kao jedna od vodećih članica Pokreta nesvrstanih i Grupe 77 zemalja u razvoju (G-77), nastojala da dokaže da je moguće uspostaviti novi obrazac odnosa između industrijski razvijenih zemalja, kojima je delimično i sama pripadala i saveznika iz ove koalicije, čije su ekonomske baze još uvek bile u fazi izgradnje. U skladu sa određenim dominantnim grupama unutar UN-a, jugoslovenska teorija razvoja spajala je marksistička sa neoklasičnim ekonomskim shvatanjima u ambiciozan program globalne reforme koja je odstupala od stavova kapitalističkih i socijalističkih velesila. Ipak, u isto vreme, ova vizija globalizacije morala je da se nosi sa ideološkim, geopolitičkim i ekonomskim uticajem novonastale neoliberalne revolucije, koja je početkom osamdesetih počela bitno sužavati prostor za manevrisanje. Pored programskih načela sadržanih u zvaničnim dokumentima, ovaj rad prati i konkretne oblike jugoslovenske bilateralne ekonomske saradnje sa pojedinim afričkim zemljama.
Published in DiRROS: 06.05.2024; Views: 62; Downloads: 22
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Abstract: Uncertainty exists whether patients with spinal cord compression (SCC) from a highly radiosensitive tumor require decompressive spinal surgery in addition to radiotherapy (RT). This study addressed the question by evaluating patients receiving RT alone for SCC from myeloma. Patients and methods. Data of 238 patients were retrospectively analyzed for response to RT and local control of SCC. In addition, the effect of RT on motor function (improvement, no further progression, deterioration) was evaluated. Overall response was defined as improvement or no further progression of motor dysfunction. Prior to RT, patients were presented to a neurosurgeon for evaluation whether upfront decompressive surgery was indicated (e.g. vertebral fracture or unstable spine). Results. In the entire cohort, the overall response rate was 97% (53% improvement plus 44% no further progression). Following RT, 88% of the patients were able to walk. Of the 69 non-ambulatory patients 44 patients (64%) regained the ability to walk. Local control rates at 1, 2 and 3 years were 93%, 82% and 82%, respectively. A trend towards better local control was observed for patients who were ambulatory before starting RT (p = 0.08) and those with a more favorable performance status (p = 0.07). Conclusions. RT alone provided excellent response rates, functional outcomes and local control in patients with SCC from myeloma. These results should be confirmed in a prospective randomized trial.
Keywords: myeloma, spinal cord compression, radiotherapy
Published in DiRROS: 30.04.2024; Views: 105; Downloads: 50
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