163 research outputs found
Scolopendrellopsis persicus Scheller, n. sp.
No full textScolopendrellopsis persicus Scheller n. sp. Figs 1 –7 Type locality. Iran, Esfahan Province, Shareza, 32 ˚ 0 3 ʹ 43.79 ʺN 51 ˚ 50 ʺ 33.61 ʺE. Type specimen. Holotype. ad(Ƥ),, 12 Mars 2009, leg. M.R. Kavianpour. - 1 specimen. Diagnosis. S. persicus n. sp. may be closest to the wide-spread S. subnuda (Hansen, 1903) but the new species has fewer head setae and thinner central rod. Good distinguishing characters are the shape of the central rod of the head, very thin in S. persicus, distinct in S. subnuda, the shape of the post-antennal organs, ovoid in S. persicus, not subspherical, the shape of the posterior appendages of the tergites II and III, more slender in S. persicus than in S. subnuda and the cerci are more setose in S. persicus than in S. subnuda. Derivation of name. From the Latin persicus = Persian (referring to the position of the collecting site). Description (by first author). Length. 1.55 mm. Head. Longish, 1.4 times as long as broad, with broadest part at articulation points of the mandibles, which are concealed under margins of head. Posterior part of central rod thin but distinct, 1.1 times as long as much thinner anterior part; frontal and median branches lacking. Dorsal side of head sparsely setose, setae thin, short, of subequal length. Diameter of post-antennal organ 0.5 of greatest diameter of 3 rd antennal segment, entrance tube very short. Palp of first maxilla bud-like with one point only, 1.7 times as long as the greatest diameter. Cuticle of central and posterior part of dorsal side of the head almost glabrous, anterolateral part between post-antennal organ and margin of head with rounded granules. Antennae. 0.1 of the length of the body, both 16 segments. First segment cylindrical, thinner than following segments, 1.1 times as long as greatest diameter; setae in one whorl, inner setae longer than outer ones, longest seta ¼ of the length of the greatest segment diameter. Second segment about as long as wide with seven setae evenly spaced around the segment, inner setae distinctly longer than outer setae. Chaetotaxy of 3 rd segment as on preceding one. Setae longest on proximal segments, longest of them ~ 3 times longer than longest setae on distal segments. Proximal and median parts of the antennae with only primary whorl of setae, a secondary whorl in median and subdistal part but never complete. Circular sensory organs on dorsal side of segments 11 and 12, bladder-shaped organs on segments 13-15; small spined organs on dorsal side (but most of them hidden under foreign particles). Apical segment subspherical with wide connection to preceding segment. All segments with short pubescence. Trunk. Twenty-one dorsal tergites and subtergites. 1 st tergite rudimentary with 6 thin setae in one transversal row. 2 nd tergite entire complete, broader than long, with two narrow posterior extensions, these about as long as the tergite; tergite almost glabrous, short pubescence on margins of the posterior extensions. Anterior part with 8 setae, each extension with one apical seta only. 3 rd tergite entire but with anterolateral indentations; anterior part with 6 setae in a transversal row, posterior part with two posteriorly directed extensions, these 2.5 times as long as the breadth at base, length 0.6 of interdistance; posterior part with an anterior transversal row of setae and three setae in connection with the extensions as on preceding segment. Thirteen tergites with paired posterior extensions, the latter longest on anterior tergites, length of extensions 0.3 of interdistance on tergite XIV. No seta between apical and inner basal setae. Tergites almost glabrous. Anterolateral setae not larger than other setae. Legs. First pair of legs short, 3 -segmented: tarsus about as broad as long with two almost straight claws, at least three short setae, pubescence indistinct. Tarsus of last pair of legs 2.6 times as long as greatest diameter, four dorsal setae, long protruding, longest seta as long as the greatest diameter of tarsus, two shorter ventral setae distally: anterior claw longest and with broader base than posterior claw, the former 1.2 times as long as the latter and as long as the diameter of tarsus. Tibia 1.3 times as long as wide with at least three setae. All legs with sparse but distinct pubescence. Habitat. Garden with pomegranate trees and grape vines, in soil.Published as part of Scheller, Ulf, Kavianpour, Mohammad Reza & Esfandiari, Mehdi, 2011, First record of Symphyla (Myriapoda) from Iran, with description of a new species in Scolopendrellopsis (Scolopendrellidae), pp. 66-68 in Zootaxa 3041 on pages 66-68, DOI: 10.5281/zenodo.20233
Spike train auto-structure impacts post-synaptic firing and timing-based plasticity
No full textCortical neurons are typically driven by several thousand synapses. The precise spatiotemporal pattern formed by these inputs can modulate the response of a post-synaptic cell. In this work, we explore how the temporal structure of pre-synaptic inhibitory and excitatory inputs impact the post-synaptic firing of a conductance-based integrate and fire neuron. Both the excitatory and inhibitory input was modeled by renewal gamma processes with varying shape factors for modeling regular and temporally random Poisson activity. We demonstrate that the temporal structure of mutually independent inputs affects the post-synaptic firing, while the strength of the effect depends on the firing rates of both the excitatory and inhibitory inputs. In a second step, we explore the effect of temporal structure of mutually independent inputs on a simple version of Hebbian learning, i.e., hard bound spike-timing-dependent plasticity. We explore both the equilibrium weight distribution and the speed of the transient weight dynamics for different mutually independent gamma processes. We find that both the equilibrium distribution of the synaptic weights and the speed of synaptic changes are modulated by the temporal structure of the input. Finally, we highlight that the sensitivity of both the post-synaptic firing as well as the spike-timing-dependent plasticity on the auto-structure of the input of a neuron could be used to modulate the learning rate of synaptic modification
Ketamine dysregulates the amplitude and connectivity of high-frequency oscillations in cortical–subcortical networks in humans: evidence from resting-state magnetoencephalography-recordings
Get PDFHypofunctioning of the N-methyl-D-aspartate receptor (NMDA-R) has been prominently implicated in the pathophysiology of schizophrenia (ScZ). The current study tested the effects of ketamine, a dissociative anesthetic and NMDA-R antagonist, on resting-state activity recorded with magnetoencephalography (MEG) in healthy volunteers. In a single-blind cross-over design, each participant (n = 12) received, on 2 different sessions, a subanesthetic dose of S-ketamine (0.006mg/Kg) and saline injection. MEG-data were analyzed at sensor- and source-level in the beta (13–30 Hz) and gamma (30–90 Hz) frequency ranges. In addition, connectivity analysis at source-level was performed using transfer entropy (TE). Ketamine increased gamma-power while beta-band activity was decreased. Specifically, elevated 30–90 Hz activity was pronounced in subcortical (thalamus and hippocampus) and cortical (frontal and temporal cortex) regions, whilst reductions in beta-band power were localized to the precuneus, cerebellum, anterior cingulate, temporal and visual cortex. TE analysis demonstrated increased information transfer in a thalamo-cortical network after ketamine administration. The findings are consistent with the pronounced dysregulation of high-frequency oscillations following the inhibition of NMDA-R in animal models of ScZ as well as with evidence from electroencephalogram-data in ScZ-patients and increased functional connectivity during early illness stages. Moreover, our data highlight the potential contribution of thalamo-cortical connectivity patterns towards ketamine-induced neuronal dysregulation, which may be relevant for the understanding of ScZ as a disorder of disinhibition of neural circuits
A Review of a Book by Barbara Alicja Jańczak entitled Deutsch-polnische Familien: Ihre Sprachen und Familienkulturen in Deutschland und in Polen (Sprache – Kultur – Gesellschaft, Beiträge zu einer anwendungsbezogenen Sozio- und Ethnolinguistik. Vol. 11). Frankfurt am Main et al., 2013: Peter Lang Verlag. ISBN: 978-3-631-62525-5, 270 pages
No full textDennis Scheller-Boltz, a well-known and acknowledged German slavist, carries out an extensive and in-depth discussion of the monograph written by Barbara Alicja Jańczak entitled Deutsch-polnische Familien: Ihre Sprachen und Familienkulturen in Deutschland und in Polen [German-Polish families: languages and family cultures in Germany and Poland]. The reviewer rightly emphasizes the novelty, relevance and accuracy of the work as well as the fact that it takes a wide range of aspects into consideration, including not only linguistic but also, among others, sociological and cultural aspects of the examined matter. The reviewer draws our attention to the fact that the conclusions the author of the monograph reaches are based on reliable and up to date sources of information such as Główny Urząd Statystyczny [the Central Statistical Office of Poland] and Statistisches Bundesamt Deutschland [The Federal Statistical Office of Germany]. The form and the organization of the monograph, which in a transparent manner – using a well-constructed, lucid tables and figures – provides the reader with the great abundance of information, are, according to the reviewer, highly commendable
MA040 Krieg in China / [hrsg. von Ernst Schneller]
No full text著者は奥付による / Author from colophon15 p. ; 23 c
MA040 Krieg in China / [hrsg. von Ernst Schneller]
Get PDF著者は奥付による / Author from colophon15 p. ; 23 cmboo
SAE Argonauts
No full textThe Society of Automotive Engineers (SAE) Micro-Class competition is normally held as a practical testing of engineering skills offered to engineering programs. This allows teams working within the competition to
learn more about practical applications of engineering in the industry. The overall goal is to create a remote-controlled aircraft using new and preexisting skills within the team, often requiring research outside of course content to broaden the members' learning perspectives.
Much of the team is new to aircraft design and practical engineering in general and this project is allowlng our team to collaborate on a specific set of competition goals. The 2020-2021 team has decided not to attend the in-person competition due to possible uncertainties of future cancellation similar to the previous year's competition This is the fourth year the UWF SAE team will be attempting the goal of making a competition ready RC plane but the first using Micro Class competition rule
Afrauropus occiduus Remy 1959
No full textAfrauropus occiduus Remy, 1959 TYPE MATERIAL. — Holotype by monotypy, “ Mâle 9pp. Mts Nimba (Lamotte)” (PMLA002). According to Remy’s description the collecting data are: “Camp du Gouan, forêt 1200 m, 25 mars, 1957”. REMARKS Remy (1959) erected a new genus, Afrauropus, and a new family, Afrauropidae, for this specimen because he found the following features not seen in other pauropods: the antennal globulus had two pyriform organs inside the basket of bracts; the empodia of the tarsi were stalked, and as far as can be seen in Remy’s drawing (1959: fig. 6, 4) he could not find any claws; head with only one single seta (between and posterior of the antennal bases) and tergites without other setae than the bothriotricha. In some characters the specimen was more alike pauropods already described, e.g., as to antennal stalk, pygidial chaetotaxy, leg segmentation and occurrence of bothriotricha. The renewed study revealed the following observations deviating from or complimentary to Remy’s description: 1) head. There are at least two more tergal setae than Remy found (Fig. 1A), both short, striate, blunt and inserted between and close to the antennal bases but more anteriorly than the seta observed by Remy.There might be a seta behind the temporal organs too. No insertion areas of other setae could be seen; 2) antennae. Remy found that the globulus of the sternal antennal branch had two pyriform capsules inside the basket of bracts. As far as the author could see Remy had made a mistake in interpreting the space on both sides of the capsule which both were somewhat pyriform (Fig. 1B). In fact the capsule is attached to an unusually long stalk dividing the space inside the bracts in two “pyriform” empty spaces. The globulus of the sternal antennal branch is proportionately large and has inside the basket of bracts a long-stalked and small capsule; 3) legs. Remy found that the empodia were stalked, a character which was unique for Afrauropus when it was described. Stalked empodia have later been found in other species (in Allopauropus Silvestri, 1902 and Cauvetauropus Remy, 1952). As far as can be seen from Remy’s drawing the empodia of leg 4 have no claws, but they are there (Fig. 1 C-E). Legs 1 and 9 are 5-segmented, those interposed are 6-segmented, with metatarsus. The latter is short, ring-shaped (Fig. 1F), a character also found in other species (in Allopauropus Silvestri, 1902 and Cauvetauropus Remy, 1952). The new observations require a suppression of the family Afrauropidae Remy, 1959 (Remy 1959: 1020) and a transfer of the genus to Pauropodidae Lubbock, 1867. The original diagnosis of the genus is amended consequently.Published as part of Scheller, Ulf, 2008, On Afrauropus and Monodauropus, two African genera of Pauropoda (Myriapoda), pp. 795-798 in Zoosystema 30 (4) on pages 796-797, DOI: 10.5281/zenodo.468999
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