Combination of Cladding Processes with Subsequent Hot Forming as a New Approach for the Production of Hybrid Components

A new process chain for the manufacturing of load-adapted hybrid components is presented. The "Tailored Forming” process chain consists of a deposition welding process, hot forming, machining and an optional heat treatment. This paper focuses on the combination of laser hot-wire cladding with subsequent hot forming to produce hybrid components. The applicability is investigated for different material combinations and component geometries, e.g. a shaft with a bearing seat or a bevel gear. Austenitic stainless steel AISI 316L and martensitic valve steel AISI HNV3 are used as cladding materials, mild steel AISI 1022M and case hardening steel AISI 5120 are used as base materials. The resulting component properties after laser hot-wire cladding and hot forming such as hardness, microstructure and residual stress state are presented. In the cladding and the heat-affected zone, the hot forming process causes a transformation from a welding microstructure to a fine-grained forming microstructure. Hot forming significantly affects the residual stress state in the cladding the resulting residual stress state depends on the material combination.Mechanical Engineerin

Dishkeya gen. nov., a New World endemic genus of leaf-mining Tischeriidae (Lepidoptera), transferred from Tischeria Zeller

We describe a new genus, Dishkeya Stonis, gen. nov., and a new species, Dishkeyagothica Diškus & Stonis, sp. nov., discovered feeding on Gouania lupuloides (L.) Urb., Rhamnaceae. We dis-cuss the diagnostics of Tischeria Zeller and Dishkeya gen. nov.; the latter is characterized by the absence of a juxta, the presence of a pseudognathos, and well-developed carinae of the phallus in the male genitalia. We newly combine Tischeria bifurcata Braun and Tischeria gouaniae Stonis & Diškus with Dishkeya and des-ignate the latter species as the type species of the new genus. All species treated in the paper are illustrated with drawings or pho-tographs of the male genitalia

Assessment of security risks of public universities in terms of physical protection

Artykuł dotyczy występowania czynów niedozwolonych oraz innych form przestępczości przeciwko środowisku na uczelniach publicznych odnoszących się do funkcjonowania obiektów tego rodzaju. Artykuł koncentruje się również na zastosowaniu wybranych metod analizy ryzyka i oceny wpływu błędu ludzkiego jako czynnika ryzyka w procesie ochrony fizycznej osób i mienia w środowisku uczelni publicznych.The article deals with the occurrence of illegal acts and other forms of crime in the environment of public universities (referred to as PU) relating to the operation of objects of this nature. The paper is also focused on the application of selected methods of risk analysis and the evaluation of the impact of human error as a risk factor in the complex process of physical protection of persons and property in the environment of public universities

Dishkeya gen. nov., a New World endemic genus of leaf-mining Tischeriidae (Lepidoptera), transferred from Tischeria Zeller

We describe a new genus, Dishkeya Stonis, gen. nov., and a new species, Dishkeyagothica Diškus & Stonis, sp. nov., discovered feeding on Gouania lupuloides (L.) Urb., Rhamnaceae. We dis-cuss the diagnostics of Tischeria Zeller and Dishkeya gen. nov.; the latter is characterized by the absence of a juxta, the presence of a pseudognathos, and well-developed carinae of the phallus in the male genitalia. We newly combine Tischeria bifurcata Braun and Tischeria gouaniae Stonis & Diškus with Dishkeya and des-ignate the latter species as the type species of the new genus. All species treated in the paper are illustrated with drawings or pho-tographs of the male genitalia

Efekty działań mających na celu zapobieganie wybuchom skał i gazu, podejmowanych w Republice Czeskiej

In the Czech Republic, the prevention of rock and gas outbursts is carried out in the course of driving mine workings in seams and in sandstone and conglomerate beds classified into a category with the highest degree of rock and gas outburst hazard. It is a case of active methods that aim at prevention of rock and gas outbursts by creating a protection zone in front of and in sides of mine workings being driven and passive methods that mitigate the effects of outbursts (Hudeček et al., 2009, 2010). In this article, authors present recommendations and proposals for changes in rock and gas outburst prevention. These proposed changes should reflect in increased efficiency in coping with this anomalous geomechanical events.Działania w celu zapobiegania wybuchom skał i gazów w Republice czeskiej podejmowane są już na etapie drążenia wyrobisk w złożach oraz w piaskowcach oraz w pokładach zlepieńców sklasyfikowanych jako lokalizacje o najwyższym stopniu zagrożenia wybuchami skał i gazów. W tym przypadku mamy do dyspozycji metody aktywne, których celem jest zapobieżenie wybuchom skał i gazów poprzez stworzenie strefy ochronnej w części czołowej i bocznych częściach wyrobiska oraz metody bierne, mające na celu złagodzenie skutków wybuchu (Hudecek et al., 2009, 2010). W artykule autor rekomenduje i zaleca dokonanie pewnych zmian w systemie zapobiegania wybuchom skał i gazów. Proponowane zmiany skutkować powinny zwiększoną skutecznością działania w przypadku wystąpienia zjawisk geomechanicznych uznawanych za anomalie

A Gondwanan concept of Simplimorpha Scoble (sensu lato): a step toward clarity in the generic diagnostics of global Nepticulidae (Lepidoptera)

Stonis, Jonas R., Diškus, Arūnas, Remeikis, Andrius, Solis, M. Alma (2018): A Gondwanan concept of Simplimorpha Scoble (sensu lato): a step toward clarity in the generic diagnostics of global Nepticulidae (Lepidoptera). Zootaxa 4521 (2): 151-182, DOI: https://doi.org/10.11646/zootaxa.4521.2.

Asteraceae: Host to the Greatest Diversity of Leafmining Nepticulidae (Lepidoptera) in South America?

Pygmy moths (Nepticulidae) associated with Asteraceae are poorly known and very rare worldwide. Recently, we discoveredmany leaf-mining nepticulids in South America feeding on Asteraceae. We review all known records of Asteraceae-feeding Nepticulidae, which in the Neotropics (including the Andes and Patagonia) previously included only Stigmella Schrank. We describe six new species of Stigmella from equatorial South America: S. jungiae Diškus and Stonis, n. sp. (feeding on Jungia L.f.), S. aeneola Diškus and Stonis, n. sp., S. violea Diškus and Stonis, n. sp., S. bracteata Diškus and Stonis, n. sp. (feeding on Liabum Adans.), S. spatiosa Diškus and Stonis, n. sp. (feeding on Ageratina Spach), and S. auripennata Diškus and Stonis, n. sp. (feeding on Baccharis L.). All new taxa are illustrated with photographs of the adults, their genitalia, and leaf mines. Additionally, leaf mines of three unknown nepticulid taxa on Jungia (aff. J. polita Griseb.), Piptocoma discolor (Kunth) Pruski, Gynoxys laurifolia (Kunth) Cass., and G. acostae Cuatrec. are documented for the first time. We diagnose and designate two new species groups and one new species complex in Stigmella.We discuss the origin and diversity of Asteraceae in the Neotropics and illustrate the distribution of Stigmella species feeding on representatives of Asteraceae at the tribal level.Fil: Stonis, Jonas R.. Vytautas Magnus University; LituaniaFil: Arunas, Diskus. Vytatutas Magnus University; LituaniaFil: Katinas, Liliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División de Plantas Vasculares; ArgentinaFil: Solis, M. Alma. National Museum of Natural History; Estados Unido

Pseudopostega matrona Karsholt & Remeikis 2021, sp. nov.

Pseudopostega matrona Karsholt & Remeikis, sp. nov. urn:lsid:zoobank.org:act: C615037C-7B30-4194-9EBE-753415C33E73 Type material. Holotype: ♂, TURKEY, 40 km NE of Antalya, road to Köprülü Canyon, National Park, alt. 200 m, 28–29.iv.1993, Karsholt leg., genitalia slide no. RA1084 (ZMUC). Paratypes: 2 ♂, same collection data as for holotype, genitalia slide nos RA1083, Karsholt5083 (ZMUC). Diagnosis. Externally, the new species differs from other members of the matrona species group by the golden glossy, grey-brown, apically ornated forewing (P. nigrimaculella Puplesis & Robinson and P. alleni Puplesis & Robinson possess a snow-white forewing with very few markings apically). In the male genitalia, P. matrona sp. nov. differs from P. nigrimaculella by the basally very wide and strongly chitinized juxta, and from P. alleni by the large, triangular lobes of uncus, distally pointed gnathos, and very long juxta (Fig. 2). Male (Figs. 4–16). Forewing length 3.8–4.1 mm; wingspan 8.5–8.8 mm (n = 3). Head: palpus cream, short; frontal tuft large, comprised of piliform, snow-white scales (Figs. 4, 5); collar very large, distally slightly bilobed (Figs. 4, 6), comprised of lamellar, grey-brown scales with strong golden gloss; scape very large, snow-white, distally with some bronze scales; antenna golden glossy, pale grey-brown, exceeding 2/3 of the forewing. Thorax and tegula grey-brown with strong golden gloss and little purple iridescence. Forewing (Fig. 7) grey-brown with golden gloss and little purple iridescence in basal half and with white and dark grey-brown markings in apical half (Fig. 13). Apex of forewing curved up, with a large, black apical dot, three brown-black costal strigulae and one brown-black tornal strigula, and a distinctive tuft of dark piliform scales; fringe grey-brown; forewing underside dark grey-brown, without spots or androconia. Hindwing and fringe dark grey-brown with golden gloss and little purple iridescence on upper side and underside. Legs grey-brown with golden gloss and some cream scales, especially abundant on hindleg underside. Abdomen brown with strong golden gloss and little purple iridescence on upper side, pale brown with golden gloss and many white-tipped scales on underside; genital plates golden cream, contrasting with colour of the abdomen (Figs. 15, 16); anal tufts yellowish cream, short (Fig. 14). Male genitalia (Figs. 17–30). Capsule 735–770 µm long, 565–590 µm wide. Uncus with two very large lateral lobes and wide median excavation (Figs. 17, 26). Gnathos inverted V-shaped, with a large central element (Figs. 2, 19, 26). Valva 580–610 µm long, with a large, 320–390 µm long cucullar lobe (Fig. 28) and about 110 µm long median process (Figs. 27, 29); transtilla absent. Juxta strongly chitinized, wide, triangular proximally, slender, little chitinized distally (Figs. 2, 24, 25). Vinculum widely rounded, without lateral lobes. Female. Unknown. Bionomics. Based upon specimens available, adults fly in late April. The type specimens were netted during the day by sweeping the vegetation in a moist meadow with low bushes – in an otherwise agricultural area. Otherwise, biology is unknown. Distribution. This species is known from a single locality in southern Turkey, eastern Mediterranean, at an elevation of about 200 m. Etymology. The species name is a noun, derived from the Latin matrona (a matron), with reference to the exceptionality of the new species, possessing the most distinctive external as well as internal (genital) characters within the species group. In ancient Rome, matron was applied to a women high status, typically the respected mother of the family or household.Published as part of Stonis, Jonas R., Remeikis, Andrius, Solis, M. Alma & Karsholt, Ole, 2021, Diagnostics and updated checklist of Oriental Pseudopostega (Opostegidae) including the matrona species group with a new, extralimital species discovered in the Mediterranean, pp. 341-360 in Zootaxa 4933 (3) on page 356, DOI: 10.11646/zootaxa.4933.3.3, http://zenodo.org/record/455494

Two new Fabaceae-feeding Nepticulidae (Lepidoptera) from the Western Hemisphere, including a potential pest of the economically important Centrolobium Mart. ex Benth

We describe two new species of Nepticulidae (Lepidoptera) from the Western Hemisphere that feed on Fabaceae: Stigmella mimosae Disˇkus and Stonis, new species, on Mimosa albida Willd. (Caesalpinioideae), and Acalyptris minimus Disˇkus and Stonis, new species, on Centrolobium ochroxylum Rose ex Rudd. (Faboideae). Centrolobium ochroxylum is an economically important tree in South America that is exported for timber. The new species are illustrated with photographs of the adults, genitalia, and the leaf minesBaltijos-Amerikos biotaksonomijos institutasGamtos tyrimų centrasMokytojų rengimo institutasVytauto Didžiojo universiteta

Characteristics of joining and hybrid composite forging of aluminum solid parts and galvanized steel sheets

In lightweight construction, light metals like aluminum are used in addition to high-strength steels. However, a welded joint of aluminum and steel leads to the precipitation of brittle, intermetallic phases and contact corrosion. Nevertheless, to use the advantages of this combination in terms of weight saving composite hybrid forging has been developed. In this process, an aluminum solid part and a steel sheet were formed in a single step and joined at the same time with zinc as brazing material. For this purpose, the zinc was applied by hot dipping on the aluminum in order to produce a connection via this layer in a forming process, under pressure and heat. Due to the formed intermediate layer of zinc, the formation of the Fe-Al intermetallic phases and the contact corrosion are excluded. By determining the mathematical relationships between joining parameters and the connection properties the strength of a specific joint geometry could be adjusted to reach the level of conventional joining techniques. In addition to the presentation of the joint properties, the influence of the joining process on the structure of the involved materials is also shown. Furthermore, the failure behavior under static tensile and shear stress will be shown