162,261 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
A new species of Diacheopsis from Russia
No full textVlasenko, Anastasia V., Vlasenko, Vyacheslav A., Kabilov, Marsel R. (2022): A new species of Diacheopsis from Russia. Phytotaxa 541 (2): 193-200, DOI: 10.11646/phytotaxa.541.2.9, URL: http://dx.doi.org/10.11646/phytotaxa.541.2.
Stemonitis amphorocolumella (Stemonitidaceae, Myxomycetes), a new species from Western Siberia
No full textVlasenko, Anastasia V., Moreno, Gabriel H., Vlasenko, Vyacheslav A. (2023): Stemonitis amphorocolumella (Stemonitidaceae, Myxomycetes), a new species from Western Siberia. Phytotaxa 592 (1): 59-67, DOI: 10.11646/phytotaxa.592.1.5, URL: http://dx.doi.org/10.1094/PDIS-04-22-0755-PD
Understanding the impact of Pair Programming on developers attention: A case study on a large industrial experimentation
No full textPair Programming is one of the most studied and debated development techniques. However, at present, we do not have a clear, objective, and quantitative understanding of the claimed benefits of such development approach. All the available studies focus on the analysis of the effects of Pair Programming (e.g., code quality, development speed, etc.) with different findings and limited replicability of the experiments. This paper adopts a different approach that could be replicated in an easier way: it investigates how Pair Programming affects the way developers write code and interact with their development machine. In particular, the paper focuses on the effects that Pair Programming has on developers' attention and productivity. The study was performed on a professional development team observed for ten months and it finds out that Pair Programming helps developers to eliminate distracting activities and to focus on productive activities
[Report to Chief J. E. Curry, by an unknown author #1]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
[Report to Chief J. E. Curry, by an unknown author #2]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
Toward a better understanding of tool usage (NIER track)
No full textDevelopers use tools to develop software systems and always alleged better tools are being produced and purchased. Still there have been only limited studies on how people really use tools; these studies have used limited data, and the interactions between tools have not been properly elaborated. The advent of the AISEMA (Automated In-Process Software Engineering Measurement and Analysis) systems [3] has enabled a more detailed collection of tools data. Our "new idea" is to take advantage of such data to build a simple model based on an oriented graph that enables a good understanding on how tools are used individually and collectively. We have empirically validated the model analyzing an industrial team of 19 developers for a period of 10 months
A new Leccinum species from the Altai Mountains
No full textVlasenko, Vyacheslav A. (2023): A new Leccinum species from the Altai Mountains. Phytotaxa 625 (2): 191-200, DOI: 10.11646/phytotaxa.625.2.5, URL: https://phytotaxa.mapress.com/pt/article/download/phytotaxa.625.2.5/5127
Pair Programming and Software Defects--A Large, Industrial Case Study
No full textIn the last decade, there has been increasing interest in pair programming (PP). However, despite the existing work, there
is still a lack of substantial evidence of the effects of PP in industrial environments. To address this issue, we have analyzed the work of
a team of 17 industrial developers for 14 months. The team is part of the IT department of a large Italian manufacturing company; it
adopts a customized version of extreme programming (XP). We have investigated the effects of PP on software quality in five different
scenarios. The results show that PP appears to provide a perceivable but small effect on the reduction of defects in these settings
The API economy: Playing the devil's advocate
No full textA lot of hype surrounds the API economy. Different
observers have promised a variety of potential benefits,
but which of these promises are true and which should
be taken with a grain of salt?
In this article, we take a look at some of the major
benefits allegedly produced by the API economy and
its key facets. We examine the claims various authors
have made and offer counterclaims and potentially
opposing views. Our goal is not to criticize or disprove
these claims, but to take a wider look at these issues
and to provide additional food for thought
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