3,439 research outputs found
Medmassa nyctalops Simon 1910
No full textMedmassa nyctalops Simon, 1910 Medmassa nyctalops Simon, 1910: 377. (Ƥ holotype: EQUATORIAL GUINEA: Bioko [Fernando Poo], Musola, leg. L. Fea, MNHN – not examined). Remarks. This species was described by Simon (1910) from a single female collected at Musola, Bioko (Fernando Poo). The type material could not be traced in MNHN and is presumed lost. The original description is inadequate for its accurate identification. Despite considerable Corinnidae material having recently been collected on Bioko by staff of the CAS, which was examined by the second author, no fresh Medmassa specimens could be recognised, and thus the status of this species remains unresolved.Published as part of Haddad, Charles R. & Bosselaers, Jan, 2010, A revision of the genus Medmassa Simon, 1887 (Araneae: Corinnidae) in the Afrotropical Region, pp. 1-12 in Zootaxa 2361 on page 11, DOI: 10.5281/zenodo.19362
Environmental and Parental Influences on Offspring Health and Growth in Great Tits (Parus major)
No full textPMCID: PMC3728352This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited
Forecasting banknotes
No full textA central bank’s liquidity forecast is important in ensuring that it supplies the banking system’s need for central bank money. Banknote (or currency in circulation) demand is the largest and for some central banks the most variable component of the liquidity forecast. Accurate forecasting of banknotes is essential in ensuring an accurate liquidity forecast and in turn effective monetary policy implementation. This Handbook discusses these issues and outlines a structural time series state space (STSSS) model which is now used by central banks including the Bank of England and ECB to forecast banknotes (currency in circulation).Forecasting banknotes
Łojasiewicz–Simon gradient inequalities for coupled Yang–Mills energy functions
No full textWe prove Lojasiewicz–Simon gradient inequalities for coupled Yang–Mills energy functions using Sobolev spaces which impose minimal regularity requirements on pairs of connections and sections. The Lojasiewicz–Simon gradient inequalities for coupled Yang–Mills energy functions generalize that of the pure Yang–Mills energy function due to the first author (Feehan, 2014) for base manifolds of arbitrary dimension and due to R˚ade (1992, Proposition 7.2) for dimensions two and three
Where AES is for Internet, SIMON could be for IoT
No full textAbstractWith the upcoming era of Internet of Things and the Pervasive Computing, there is a need to develop block ciphers with tight constraints such as area, power, memory, performance, throughput and others. These are so called the lightweight block ciphers which are specifically intended for resource constrained platforms. Lined up in the line is SIMON, a light weight block cipher proposed by NSA after the prompting from the U.S. Government in the year 2013 along with SPECK lightweight block cipher. SIMON implementation on hardware has excellent results in terms of area and has been found to be a very strong alternative to the existing AES. This paper involves the basic design considerations, round functions, key schedule and parameters of SIMON and also we can look forward into the implementations of SIMON in hardware comparing with the existing AES standard. This paper also focuses on the analysis in terms of area, power and delay of the SIMON 64/128 configuration in Cadence Synthesis RTL Compiler using the CMOS 180 nm and 90 nm technology libraries
Modelling individual variability in cognitive development
No full textInvestigating variability in reasoning tasks can provide insights into key issues in the study of cognitive development. These include the mechanisms that underlie developmental transitions, and the distinction between individual differences and developmental disorders. We explored the mechanistic basis of variability in two connectionist models of cognitive development, a model of the Piagetian balance scale task (McClelland, 1989) and a model of the Piagetian conservation task (Shultz, 1998). For the balance scale task, we began with a simple feed-forward connectionist model and training patterns based on McClelland (1989). We investigated computational parameters, problem encodings, and training environments that contributed to variability in development, both across groups and within individuals. We report on the parameters that affect the complexity of reasoning and the nature of ‘rule’ transitions exhibited by networks learning to reason about balance scale problems. For the conservation task, we took the task structure and problem encoding of Shultz (1998) as our base model. We examined the computational parameters, problem encodings, and training environments that contributed to variability in development, in particular examining the parameters that affected the emergence of abstraction. We relate the findings to existing cognitive theories on the causes of individual differences in development
Neuronal signature of spatial decision-making during navigation by freely moving rats by using calcium imaging
No full textSee the file "dataset_description.txt".
Associated publication:
Gobbo, F., Mitchell-Heggs, R., Tse, D., Al-Omrani, M., Spooner, P., Shultz, S. R., & Morris, R. (2022). Neuronal signature of spatial decision-making during navigation by freely moving rats using calcium imaging. Proceedings of the National Academy of Sciences, 119(44), [e2212152119]. https://doi.org/10.1073/pnas.221215211
Agraecina lineata Simon
No full textAgroeca lineata Simon 1878: 308 (descr. female). Agraecina lineata Simon 1932: 939, 970 (descr. male, non female); Grimm 1986: 14. Diagnosis: Males are easily distinguished from other liocranids from the Maghreb by the strongly pointed tibial apophysis and median apophysis of the bulb; females have an epigyne with elongate median septum, without other chitinisations. Remarks: Simon (1878) described Agraecina lineata from a juvenile or subadult female from Corsica. He described the male and female in 1932, and the species was said to occur in continental France, Corsica, Algeria and Morocco. Simon’s Fig.ure of the female epigyne is incorrect, as also indicated by Grimm (1986). The same author presented recent Fig.ures of the male palp, epigyne and vulva have never been illustrated. , Description: Measurements: Male: Total length 4.4-6.0; carapace 1.97-2.82 long, 1.64-2.21 wide. Female: Total length 8,0; carapace 2.72 long, 2.21 wide. Colour: Carapace yellowish brown with grey margin and anastomosing, radiating stripes; legs yellowish brown, not annulated; abdomen pale grey with wide median and narrower lateral longitudinal grey stripes, converging to the back. Palp (Figs. 17-18): Tibial apophysis strongly pointed, gradually narrowing, oblique to the axe of the segment: median apophysis gently curved, distal 2/3 linear and pointed; embolus straight, needle-like. Epigyne (Fig. 19): With hardly defined, short median septum in the anterior half, in the postero-median half with gently curved spermathecae visible in transparency. Vulva (Fig. 20): Anterior to the septum with two poaches, preceding long and straight copulation ducts Material examined: Algeria - Boumerdes: Reghaia, 5m, 2 males in pitfalls in marsh with tamarisk, 13.VI.1988, and 1 male 1 female, 30.IX.1988, R. B o sm a n s leg. (CRB). - Tizi Ouzou: forêt de Mizrana, 300m, 1 female, stones in grassland, 26.I.1990, R. Bosmans leg. (CRB). Spain - Malaga: Benyanina N., 1 male in pitfalls in coastal dunes, 1.IV. 1999, R. Bosmans leg. (CRB). Distribution: Algeria, Morocco, France (Alpes maritimes, Bouches du Rhone, Bretagne, Corse, Loire atlantique, Loire inférieure, Morbihan), Italy (Umbria), Spain (new record). In Algeria we collected the species mainly in salt marshes, once more to the interior in grassland.Published as part of Bosmans, Robert, 1999, The genera Agroeca, Agraecina, Apostenus and Scotina in the Maghreb countries (Araneae: Liocranidae), pp. 25-34 in Bulletin Di L' Institut Royal Des Sciences Naturelles De Belgique Entomologie 69 on pages 29-30, DOI: 10.5281/zenodo.82621
Five seconds or sixty? Presentation time in expert memory
No full textThe template theory presented in Gobet and Simon (1996a, 1998) is based on the EPAM theory (Feigenbaum & Simon, 1984; Richman et al., 1995), including the numerical parameters that have been estimated in tests of the latter; and it therefore offers precise predictions for the timing of cognitive processes during the presentation and recall of chess positions. This paper describes the behavior of CHREST, a computer implementation of the template theory, in a task when the presentation time is systematically varied from one second to sixty seconds, on the recall of both game and random positions, and compares the model to human data. As predicted by the model, strong players are better than weak players with both types of positions. Their superiority with random positions is especially clear with long presentation times, but is also present after brief presentation times, although smaller in absolute value. CHREST accounts for the data, both qualitatively and quantitatively. Strong players’ superiority with random positions is explained by the large number of chunks they hold in LTM. Strong players’ high recall percentage with short presentation times is explained by the presence of templates, a special class of chunks. The model is compared to other theories of chess skill, which either cannot account for the superiority of Masters with random positions (models based on high-level descriptions and on levels of processing) or predict too strong a performance of Masters with random positions (long-term working memory)
Spatial coding for the Simon effect in visual search
No full textTwo experiments were conducted to examine the Simon effect (i.e., faster responding when irrelevant stimulus location corresponds with response location than when it does not) in visual search tasks. The search items were arranged in a 4 x 4 grid, and grid locations were coded into sets of four, two involving inner columns and two involving outer columns. In experiment 1, three different types of inefficient search tasks were used. The Simon effects were shown to be larger when the target appeared in one of the outer columns than in one of the inner columns ("laterality effect"). This pattern of results was not observed when distractors were absent, suggesting that the laterality effect depends on the operation of selective attention. In experiment 2, a pop-out search task was used, and no significant effect of target location on the Simon effect was found. Interpretations of the results based on the attention-shift account and referential-coding account were discussed.NeurosciencesSCI(E)PubMedSSCI0ARTICLE4616-62917
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