524 research outputs found
Diacheopsis cinerea A. Vlasenko & V. Vlasenko 2022, sp. nov.
No full textDiacheopsis cinerea A. Vlasenko & V. Vlasenko, sp. nov. (Figs 1A–E, 2A–J) Index Fungorum number: IF557664; Facesoffungi number: FoF 08147 Sporocarps sessile, cylindrical, about 0.7–0.9 mm in diam. and 0.9–1.1 mm in total height, gregarious, scattered or in small groups of 2–8, drab grey, beige, densely clustered. Peridium single, membranous, translucent below, more dense at the top, fugacious above, persisting as a deep cup at the base; transparent, very light, with a slight greyish colour (in transmitted light) in the lower and lateral parts of the sporocarps; in the apex of sporotheca it is light-ocher, transparent (in transmitted light); it is often common in adjacent sporocarps, but with preservation of the side walls between adjacent sporocarps. Dehiscence is apical irregular. After the complete destruction of sporocarps, basal rings remain attached to the substrate. Columella absent. Capillitium dark violet-brown, with expanded nodes of dark brown colour, branched and anastomosed, arising from the base and forming a network connected to the peridium and the base of sporotheca by paler tips. Hypothallus continuous under the group (confluent), thin, light-coloured. Spore-mass dark brown to dark. Spores globose, 10.5–13.0 µm diam. including ornamentation, densely and uniformly covered by warts up to 0.4 µm in total height. In SEM, the ornamentation appears as dense, abundant and regularly distributed, well-developed, coralloid projections on the apex of each wart. Plasmodium not seen. Etymology:— Referring to the colour of sporocarps. Type:— RUSSIA. Altai Territory: near Losikha railway station, dry pine forest, on a fallen tree of Pinus sylvestris, 8 July 2009, leg. A. Vlasenko and V. Vlasenko, NSK 1030140 (holotype), GenBank SSU: MT 386336. Additional specimen examined:— RUSSIA. Altai Territory: near Losikha railway station, pine forest, on dead wood of Pinus sylvestris, 26 August 2019, leg. A. Vlasenko and V. Vlasenko, NSK 1030138 (paratype). Ecology:— Xylobiont. Distribution:— Known only from type locality. Comments:— Phylogenetically, Diacheopsis cinerea grouped with Lamproderma echinosporum and L. gulielmae. We have received data that other species of Diacheopsis are phylogenetically similar to those of the genus Lamproderma (Fig. 3). Diacheopsis metallica is closest to L. cristatum, while D. pauxilla is closest to L. sauteri and L. ovoideoechinulatum. Similar to Lamproderma, the morphological genus Diacheopsis consists of several separate phylogenetic lines. At the same time, the species that represent different phylogenetic lines demonstrate morphological similarities. Classification of the family Stemonitidaceae is not developed and is based on morphological features. Based on a complex of morphological features, we assigned the new species to the genus Diacheopsis. Diacheopsis cinerea has a warty ornamentation of spores, which brings it close to the group of species that have spores with warts: D. laxifila, D. minuta, D. mitchellii, D. pieninica, D. rigidifila, D. vermicularis, D. griseobrunnea and D. serpula. Spores of D. mithellii are very large, 20–21 µm in diam., covered with long spines or warted, about 1 mm in length and with tips that appear frayed under SEM. In comparison, the spores of D. cinerea are significantly smaller, 10.5–13.0 µm in diam., densely and uniformly covered with warts that are up to 0.4 µm in total height. By SEM, their ornamentation consists of dense, abundant, regularly distributed and well-developed coralloid projections on the apex of each wart. Spores of D. pieninica, D. rigidifila, and D. griseobrunnea are less than 9 µm in diam. (spores of D. cinerea are larger than 10 µm in diam.). Spores of D. laxifila are united into clusters while spores of D. cinerea are free. Sporocarps of D. minuta are very small, 0.2–0.4 mm in total height, of bronze colour while sporocarps of D. cinerea are 2–3 mm in total height, and grey-beige in colour. In D. serpula, elongated plasmodiocarps are predominant in the colony but in D. cinerea, sessile sporangia are predominant. Capillitium of D. serpula is without extensions while that of D. cinerea is with numerous filmy brown extensions. Capillitial nodes of D. vermicularis are rounded but in D. cinerea they are triangular and quadrilateral. The capillitial threads of D. vermicularis are colorless or grey and in D. cinerea they are dark violet-brown, and only the ends of threads by which they are attached to the base of sporocarp and peridium are light. The spores of D. vermicularis are light brown, with dark areas consisting of groups of warts (in transmitted light); those of D. cinerea are brown, and evenly ornamented with warts. In shape and size of sporocarps, the new species resembles D. insessa and D. nannengae, but it differs significantly by the structure of capillitium, size of the spores and their ornamentation. Spores of D. insessa are 16–22 µm in diam. and ornamented with long spines while the spores of D. cinerea are less than 14 µm in diam., and ornamented by warts. Spores of D. nannengae are ornamented with short spines while spores of D. cinerea have long warts up to 0.4 µm in total height. The capillitium of D. nannengae arises only from the base of sporotheca but in D. cinerea it arises from the base and forms a network connected by paler tips to the peridium and the base of sporotheca. Samples of D. cinerea were first found by us in 2009 in dry pine forests in the northern part of the “Verkhneobsky pine forest”, located on the right bank of Priobsky Plateau. Diacheopsis cinerea was collected there again 10 years later, which indicates the existence of a stable community of the species. The fructification of the species was observed after prolonged rains.Published as part of Vlasenko, Anastasia V., Vlasenko, Vyacheslav A. & Kabilov, Marsel R., 2022, A new species of Diacheopsis from Russia, pp. 193-200 in Phytotaxa 541 (2) on pages 195-199, DOI: 10.11646/phytotaxa.541.2.9, http://zenodo.org/record/638879
What are the implications of Curriculum Learning strategy on IRL methods?: Investigating Inverse Reinforcement Learning from Human Behavior
No full textInverse Reinforcement Learning (IRL) is a subfield of Reinforcement Learning (RL) that focuses on recovering the reward function using expert demonstrations. In the field of IRL, Adversarial IRL (AIRL) is a promising algorithm that is postulated to recover non-linear rewards in environments with unknown dynamics. This study investigates the potential benefits of applying the Curriculum Learning (CL) strategy to the AIRL algorithm. For our experiments, we use a randomized partially observable Markov decision process in the form of a grid-world-like environment. Using only expert demonstrations obtained with an RL algorithm under the true reward function, we train AIRL in a variety of configurations and identify an effective curriculum. Our results show, that a well-constructed curriculum can enhance the performance of AIRL twofold in both key aspects: the speed of convergence and the efficiency of using expert demonstrations. We thus conclude that CL can be a useful addition to an AIRL-based solution. Full code is available online in the supplementary material https://github.com/mikhail-vlasenko/curriculum-learning-IRL.CSE3000 Research ProjectComputer Science and Engineerin
FIGURE 2 in A new species of Tulostoma genus from Siberia
No full textFIGURE 2. Мicromorphological characters of Tulostoma morenoi (holotype). (a, c) Spores, capillitial threads (SEM). (b) Spores (SEM). (d) Spore warts with ridge-like anastomoses (SEM). (e) Spore, spore warts (SEM). Scale bars: a—30 μm, b, c, e—2 μm, d—1 μm.Published as part of Vlasenko, Vyacheslav A. & Vlasenko, Anastasia V., 2023, A new species of Tulostoma genus from Siberia, pp. 25-34 in Phytotaxa 600 (1) on page 29, DOI: 10.11646/phytotaxa.600.1.4, http://zenodo.org/record/805416
FIGURE 1 in A new species of Diacheopsis from Russia
No full textFIGURE 1. Diacheopsis cinerea (holotype). A–D. Sporocarps (DM). E. Basal rings (DM). Scale bars: A–D = 1 mm, E = 2 mm.Published as part of Vlasenko, Anastasia V., Vlasenko, Vyacheslav A. & Kabilov, Marsel R., 2022, A new species of Diacheopsis from Russia, pp. 193-200 in Phytotaxa 541 (2) on page 196, DOI: 10.11646/phytotaxa.541.2.9, http://zenodo.org/record/638879
FIGURE 2 in Stemonitis amphorocolumella (Stemonitidaceae, Myxomycetes), a new species from Western Siberia
No full textFIGURE 2. Stemonitis amphorocolumella (Holotype). A.—Columella and capillitum (SEM). B.—Spore (SEM). C.—Collar at the base of the sporotheca (SEM). D.—Collar at the base of the sporotheca (SEM). Scale bars: A = 100 µm, B = 15 µm, C–D = 100 μm.Published as part of Vlasenko, Anastasia V., Moreno, Gabriel H. & Vlasenko, Vyacheslav A., 2023, Stemonitis amphorocolumella (Stemonitidaceae, Myxomycetes), a new species from Western Siberia, pp. 59-67 in Phytotaxa 592 (1) on page 63, DOI: 10.11646/phytotaxa.592.1.5, http://zenodo.org/record/783567
FIGURE 1 in Stemonitis amphorocolumella (Stemonitidaceae, Myxomycetes), a new species from Western Siberia
No full textFIGURE 1. Stemonitis amphorocolumella (Holotype). A.—Sporocarps. B.—Columella and capillitum (transmitted light). C.—Apex of columella (transmitted light). D.—Apex of columella (transmitted light). E—Apex of columella (transmitted light). F.—Collar at the base of the sporotheca (transmitted light). G.—Collar at the base of the sporotheca (transmitted light). H.—Lower part of the stalk (transmitted light). Scale bars: A = 1 mm, B = 80 µm, C–H = 100 μm.Published as part of Vlasenko, Anastasia V., Moreno, Gabriel H. & Vlasenko, Vyacheslav A., 2023, Stemonitis amphorocolumella (Stemonitidaceae, Myxomycetes), a new species from Western Siberia, pp. 59-67 in Phytotaxa 592 (1) on page 62, DOI: 10.11646/phytotaxa.592.1.5, http://zenodo.org/record/783567
NADPH-diaphorase reactivity and Fos-immunoreactivity within the ventral horn of the lumbar spinal cord of cats submitted to acute muscle inflammation induced by injection of carrageenan
No full textThe NADPH-diaphorase activity and Fos-immunoreactivity within the ventral horn of the lumbar spinal cord were studied in cats with acute unilateral myositis following injection of carrageenan into the m.m. gastrocnemius-soleus. In carrageenan-injected cats maximum in the mean number of intensely stained NADPH-diaphorase reactive (NADPH-dr) neurons was found in lamina VII (+100%) and VIII (+33%) of the contralateral ventral horn of the L6/L7 segments as compared with control animals. The maximumal level of Fos-immunoreactivity was registered in the same laminae with ipsilateral predominance (39.3 +/- 4.6 and 7.6 +/- 0.9 cells), in comparison with the contralateral side (13.6 +/- 0.8 and 5.5 +/- 0.6 cells, respectively; P<0.05). We also visualized low-intensely stained and double labelled (Fos immunoreactive +low-intensely stained NADPH-dr) multipolar and fusiform Renshaw-like cells (RLCs) within the ventral horn on both sides of the L6/L7 segments in carrageenan-injected cats. We visualized the double labelled (Fos-ir + NADPH-dr) multipolar and fusiform Renshaw-like cells (RLCs) within the ventral horn on both sides of the L6/L7 segments in carrageenan-injected cats. A significant difference in the mean number of RLCs was recorded between the ipsi- and contralateral sides in the lamina VII (13.6++/- 2.5 vs. 4.9 +/- 0.7 cells, respectively). We suppose that activation of inhibitory RLCs in ipsilateral lamina VII could be directed on attenuation of activation of motoneurons during muscle pain development. Our study showed that a significant contralateral increase in the number of NADPH-dr cells is accompanied by an ipsilateral increase in c-Fos expression in lamina VII. These data may suggest that NADPH-dr neurons of the contralateral ventral horn through commissural connections also involved in the maintenance of the neuronal activity associated with acute muscle inflammation. It is also hypothesized, that during acute myositis, plastic changes in the ventral horn activate the processes of disinhibition due to an increase in the number of NADPH-d-reactive neurons in the spinal gray matter. (C) 2016 Elsevier GmbH. All rights reserved
Linguistic strategies for professional politeness among aspiring managers: An analysis of organizational psycholinguistics
No full textIn order to effectively communicate in a professional setting, it is essential for managers to have a mastery of the language specific to their field. One tool that can be used for professional communication is verbal politeness, which involves using appropriate words and phrases to show respect for the listener and soften unfavourable information. These linguistic units promote a culture of professionalism and ethical business relationships and are a key indicator of a manager's speech competence. A psycholinguistic study examined the usage of polite language by aspiring managers. The participants were 218 undergraduate and graduate students enrolled in the Management program across various universities in Ukraine's oblasts. The organizational psycholinguistics research aimed to assess the extent to which aspiring managers incorporate professional language units such as polite words and phrases in their speech. We analyzed the references of 1,308 respondents to determine how politeness language units corresponded to the structural parts of the document. By studying 928 selected language units of politeness, we could assess the level of politeness markers. This indicator reflects future managers' skill level in applying synonymous ranges of politeness. The analysis found that respondents used various linguistic units to soften the impact of unfavourable information when conveying it to others. These units formed synonymous ranges based on context and semantic content. Only half of the students showed a wide range of knowledge and skills in appropriately using polite language. Thus, aspiring managers need to improve their knowledge and practical skills in using a variety of linguistic units of politeness in business documents. Therefore, we recommend implementing programs to improve communication levels for those pursuing higher education in management.
Disclosure Statement
No potential conflict of interest was reported by the authors.
* Corresponding author: Olena Vlasenko,
0000-0002-1011-1965 [email protected]
Vitamin D and Type 1 Diabetes Mellitus
No full textThe article presents data concerning the problem of vitamin D deficiency in adolescents with diabetes mellitus type 1. A correlation between vitamin D deficiency and compensation of the disease is shown. The examination of adolescent patients suffering from type 1 diabetes mellitus found a connection between levels of vitamin D, duration and the degree of type 1 diabetes compensation. Further studies are focused on studying the impact and the correction of vitamin D status in children with diabetes mellitus type 1, on improving the glycemic control and quality of life of a patient
Vlasenko V. A. Principle approach to managing the enterprise's investment activities in the conditions of safe implementation of real investment projects / International security studios : managerial, economic, technical, legal, environmental, informative and psychological aspects. International collective monograph. Tbilisi, Georgia : Georgian Aviation University, 2023. 1438 p. PP. 1293–1315
No full textThe conducted research is devoted to the problem of safe implementation of
real investment projects based on the application of a principled approach to managing the
enterprise's investment activities. The work substantiates the expediency of implementing a
real investment project of the production direction according to the main phases of the
investment cycle (pre-investment, investment and production). The stages of the investment
project development process at the enterprise are recommended based on their formalization in
the form of a project cycle, which will include the following stages: formulation of the
investment project (identification); development (preparation) of the investment project plan at
the enterprise; expertise (examination) of the investment project at the enterprise;
implementation of the investment project at the enterprise; assessment of the results of the
enterprise's investment project implementation. The author's version of the algorithm for the
process of developing the technical and economic justification of the investment project at the
enterprise is proposed. The stages of investment project development at the enterprise based on
the monitoring mechanism are summarized. It is recommended to supplement the operational
(production) stage of the project cycle at the enterprise with rehabilitation studies for
individual stages. During the research, it was proposed to implement a real investment project
– the launch of a qualitatively new technological line for the production of control and
measuring devices from environmentally friendly glass at the hypothetical enterprise. The
author recommends the components of the process of evaluating a real investment project or
drawing up a capital investment budget at the hypothetical enterprise. As a result of the
performance evaluation of the proposed real investment project for the hypothetical enterprise,
the feasibility of its implementation was proven by calculating the indicators of Net Present
Value (NPV), Profitability Index (PI), Internal Rate of Return on investments (IRR), Project
Payback Period (PP). The economic and operational characteristics of the proposed
development investment project at the hypothetical enterprise are summarized
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