394 research outputs found
CLASSIFICATION AND ANALYSIS OF TUBE HYDROFORMING PROCESSES WITH RESPECT TO ADAPTIVE FEM SIMULATIONS
No full textRydberg Spectroscopy Of Zeeman-decelerated Beams Of Metastable Helium Molecules
No full text"Having three and four electrons, respectively, He and He represent systems for which highly accurate \textit{ab-initio} calculations might become feasible in the near future\footnote{W.-C. Tung, M. Pavanello, L. Adamowicz, \textit{J. Chem. Phys.} \textbf{136}, 104309 (2012).}. With the goal of performing accurate measurements of the rovibrational energy-level structure of He by Rydberg spectroscopy of He and multichannel quantum-defect theory extrapolation techniques\footnote{D. Sprecher, J. Liu, T. Kr\""ahenmann, M. Sch\""afer, and F. Merkt, \textit{J. Chem. Phys.} \textbf{140}, 064304 (2014).}, we have produced samples of helium molecules in the state in supersonic beams with velocities tunable down to 100\,m/s by combining a cryogenic supersonic-beam source with a multistage Zeeman decelerator\footnote{M. Motsch, P. Jansen, J. A. Agner, H. Schmutz, and F. Merkt, \textit{arXiv:1401.7774}.}. The molecules are formed at an initial velocity of 500 m/s by striking a discharge in the pulsed expansion of helium gas from a reservoir kept at a cryogenic temperature of 10 K. Using rotationally-resolved PFI-ZEKE (pulsed-field-ionization zero-kinetic-energy) photoelectron spectroscopy, we have probed the rotational-state distribution of the molecules produced in the discharge and found vibrational levels up to and rotational levels up to to be populated. The molecular beam is coupled to a multistage Zeeman decelerator\footnote{N. Vanhaecke, U. Meier, M. Andrist, B. H. Meier, and F. Merkt, \textit{Phys. Rev. A} \textbf{75}, 031402(R) (2007).} that employs pulsed inhomogeneous magnetic fields to further reduce the beam velocity. By measuring the quantum-state distribution of the decelerated sample using photoelectron and photoionization spectroscopy we observed no rotational or vibrational state-selectivity of the deceleration process, but found that one of the three spin-rotation components of the He rotational levels is eliminated."Made available in DSpace on 2014-09-17T16:55:53Z (GMT). No. of bitstreams: 3
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Previous issue date: 2014-06-19Made available in DSpace on 2015-04-14T18:42:22Z (GMT). No. of bitstreams: 4
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Previous issue date: 2014-06-1
Flocking analysis for a generalized Motsch-Tadmor model with piecewise interaction functions and processing delays
No full textsummary:In this paper, a generalized Motsch-Tadmor model with piecewise interaction functions and fixed processing delays is investigated. According to functional differential equation theory and correlation properties of the stochastic matrix, we obtained sufficient conditions for the system achieving flocking, including an upper bound of the time delay parameter. When the parameter is less than the upper bound, the system achieves asymptotic flocking under appropriate assumptions
Combined effect of grain solarisation and oiling on the development of Sitophilus zeamais Motsch
No full textThe maize weevil (Sitophilus zeamais Motsch. Coleoptera; Curculionidae) is one the most important storage pests of maize in East Africa. We investigated the combined efficacy of grain oiling with vegetable oil and 2- hour grain solarisation on S. zeamais damage to maize. Maize, Longe 1 variety was treated at dosages of 0, 1, 2, 4 ml per kg of grain, and artificially inoculated with 12- adult S. zeamais weevils. Combination of grain oiling and solarisation of grain at 1, 2 and 4 ml per kg significantly reduced weevil emergence (F=3.06, P< 0.001) compared to the singular treatments. Solarised grain had 5.5 ± 0.3% damage compared to less than 1% damage where grain was both solarised and oiled at 1, 2 and 4 ml per kg dosage levels. Oiled and unsolarised maize grain treatments significantly (F= 18.27, P< 0.001) had better percentage viability at 93.0 ± 0.7; 91.5 ± 0.9, 91.3 ± 0.9 at 1,2, 4 ml per kg respectively, compared to 76.5 ± 3.7 for the untreated maize grain. Combined oiling and solarisation provides residual grain protection to maize against S. zeamais on maize without compromising quality and provides an alternative management option for the pest
Resistance of maize varieties to the maize weevil Sitophilus zeamais (Motsch.) (Coleoptera: Curculionidae)
No full textThis study aimed at evaluating commonly used maize varieties, collected from Melkasa and Bako Agricultural Research Centers and Haramaya University, Ethiopia, against the maize weevil Sitophilus zeamais Motsch., one of the most important cosmopolitan stored product pests in maize. A total of 13 improved maize varieties were screened for their relative susceptibility to S. zeamais. The Dobie index of susceptibility was used to group the varieties. The variety, ‘BHQP-542’, had the least index ofsusceptibility and was regarded as resistant. The varieties, ‘Katumani’, ‘Melkasa-I’, ‘Melkasa-II’, ‘Melkasa-III’, ‘Coree’, ‘BH-541’, ‘BH-660’, ‘BH-540’, ‘Rare-I’, ‘Awasa-511’, ‘ACV3’ and ‘ACV6’, were moderately resistant. Weevils fed with the resistant variety produced low numbers of F1 progeny, had a high median developmental time and a low percentage of seed damage and seed weight loss. Maize varieties with a high F1 progeny tended to have a short median developmental time. An increasingnumber of F1 progeny resulted in an increasing seed damage and seed weight loss. We found an inverse relationship between the susceptibility index and percent mortality and median developmental time; however, the numbers of F1 progeny, percent seed damage and seed weight loss were positively related with the susceptibility index. The use of resistant varieties should be promoted in managing S.zeamais in stored maize under subsistence farming conditions in Africa
Avaliação do efeito fumigante de secções de caule de Tanaecium nocturnum (Barb. Rodr.) Bur & K. Shum (bignoneaceae) sobre Sitophilus zeamais Motsch. (Coleoptera: Curculionidae).
No full textO gorgulho-do-milho, Sitophilus zeamais Motsch., pode ser considerado como a praga mais importante dos grãos e particularmente do milho armazenado no Brasil, uma vez que apresenta elevado potencial biótico, infestação cruzada e elevado número de hospedeiros. O controle químico realizado por expurgo com inseticidas a base de fosfina é empregado em larga escala trazendo como conseqüências negativas a poluição ambiental, contaminação do homem e dos animais domésticos. Uma alternativa a uso desse agrotóxico é aplicação do cipó de ?Kangárá Kanê? Tanaecium nocturnum (Barb. Rodr.) Bur& K. Shum. (Bignoniaceae), cujo componente predominante (96%) do óleo essencial do caule dessa planta é o benzaldeído. Os ramos dessa planta, quando esmagados, emitem altos teores de ácido cianídrico. Esta bignoniácea é abundante nas florestas do Estado do Acre, podendo seu emprego ser direcionado principalmente para pequenos produtores familiares. Portanto, o objetivo deste trabalho foi o de avaliar o efeito fumigante de secções de caule dessa planta no controle de adultos de S. zeamais
Resistance of maize varieties to the maize weevil Sitophilus zeamais (Motsch.) (Coleoptera: Curculionidae)
No full textThis study aimed at evaluating commonly used maize varieties, collected from Melkasa and Bako Agricultural Research Centers and Haramaya University, Ethiopia, against the maize weevil Sitophilus zeamais Motsch., one of the most important cosmopolitan stored product pests in maize. A total of 13 improved maize varieties were screened for their relative susceptibility to S. zeamais. The Dobie index of susceptibility was used to group the varieties. The variety, ?BHQP-542?, had the least index of susceptibility and was regarded as resistant. The varieties, ?Katumani?, ?Melkasa-I?, ?Melkasa-II?, ?Melkasa-III?, ?Coree?, ?BH-541?, ?BH-660?, ?BH-540?, ?Rare-I?, ?Awasa-511?, ?ACV3? and ?ACV6?, were moderately resistant. Weevils fed with the resistant variety produced low numbers of F1 progeny, had a high median developmental time and a low percentage of seed damage and seed weight loss. Maize varieties with a high F1 progeny tended to have a short median developmental time. An increasing number of F1 progeny resulted in an increasing seed damage and seed weight loss. We found an inverse relationship between the susceptibility index and percent mortality and median developmental time; however, the numbers of F1 progeny, percent seed damage and seed weight loss were positively related with the susceptibility index. The use of resistant varieties should be promoted in managing S. zeamais in stored maize under subsistence farming conditions in Africa.5937-594
Technomyrmex albipes F. Sm.
No full text<p>44. Technomyrmex albipes F. Sm.</p> <p>- Tapinoma albitarse Motsch.</p> <p>- Kandy, Cottawa, Matale, Nawalapitiya.</p> <p>Le nom de Motschulsky exprime beaucoup mieux la coloration typique de cette espece que celui plus ancien de F. Smith.</p> <p>De deux femelles portant des moignons d'ailes, l'une est normale, l'autre a la tete. plus petite, depourvue d'ocelles. Deux autres exemplaires ressemblent a de grosses ouvrieres ayant le mesonotum tres developpe, dont la portion scutellaire fait saillie en arriere.</p> <p>M. le professeur A. Forel a decrit, dans le grand ouvrage de Grandidier, sous le nom de T. albipes, une forme de Madagascar qui merite d'etre separee comme sous-espece distincte (Foreli, n. subsp.). Elle differe du type indien et malais par ses antennes un peu plus courtes, dont le scape depasse a peine le bord occipital, et par ses antennes et ses pattes entierement testacees. Chez le type, le scape depasse notablement le bord occipital et les pattes sont d'un brun fonce, avec les trochanters, genoux et tarses d'un jaune pale; les scapes sont noirs, le flagellum souvent roussatre.</p>Published as part of <i>Emery, C., 1893, Voyage de M. E. Simon à l'île de Ceylan (janvier - février 1892). 3 e Mémoire. Formicides., pp. 239-258 in Annales de la Société Entomologique de France 62</i> on page 1
Motsch, Emma (Death, 1893-07-21)
No full textAddress: 37 Loth St.Age at death: 1 yr7mo.Pg 73/437/1893/F W S/City/Dr. F. C. Gunkel/Schreiber/Carthage Rd.Original record filed in drawer labeled 'MORLEY-MUELLER'
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