Liquidus temperatures in calcium ferrite slags in equilibrium with molten copper

Experimental laboratory methods have been developed that enable phase-equilibria studies to be carried out on slags in the system Ca-Cu-Fe-O in equilibrium with metallic copper. These techniques involve equilibration at temperature, rapid quenching, and chemical analysis of the phases using electron-probe X-ray microanalysis (EPNIA). Equilibration experiments have been carried out in the temperature range of 1150 degreesC to 1250 degreesC (1423 to 1523 K) and in the composition range of 4 to 80 wt pct "Cu2O," 0 to 25 wt pct CaO, and 20 to 75 wt pct "Fe2O3" in equilibrium with metallic copper. Liquidus and solidus data are reported for the primary-phase fields of spinel (magnetite) and dicalcium ferrite. The resulting data have been used to construct liquidus isotherms of the CaO-"Cu2O"-"Fe2O3" system at metallic copper saturation.

Globally optimal learning rates in multilayer neural networks

A method for calculating the globally optimal learning rate in on-line gradient-descent training of multilayer neural networks is presented. The method is based on a variational approach which maximizes the decrease in generalization error over a given time frame. We demonstrate the method by computing optimal learning rates in typical learning scenarios. The method can also be employed when different learning rates are allowed for different parameter vectors as well as to determine the relevance of related training algorithms based on modifications to the basic gradient descent rule.

Rotational and centration stability of an aspheric intraocular lens with a simulated toric design

Purpose: To assess the stability of the Akreos AO intraocular lens (IOL) platform with a simulated toric design using objective image analysis. Setting: Six hospital eye clinics across Europe. Methods: After implantation in 1 eye of patients, IOLs with orientation marks were imaged at 1 to 2 days, 7 to 14 days, 30 to 60 days, and 120 to 180 days. The axis of rotation and IOL centration were objectively assessed using validated image analysis. Results: The study enrolled 107 patients with a mean age of 69.9 years ± 7.7 (SD). The image quality was sufficient for IOL rotation analysis in 91% of eyes. The mean rotation between the first day postoperatively and 120 to 180 days was 1.93 ± 2.33 degrees, with 96% of IOLs rotating fewer than 5 degrees and 99% rotating fewer than 10 degrees. There was no significant rotation between visits and no clear bias in the direction of rotation. In 71% of eyes, the dilation and image quality was sufficient for image analysis of centration. The mean change in centration between 1 day and 120 to 180 days was 0.21 ± 0.11 mm, with all IOLs decentering less than 0.5 mm. There was no significant decentration between visits and no clear bias in the direction of the decentration. Conclusion: Objective analysis of digital retroillumination images taken at different postoperative periods shows the aspheric IOL platform was stable in the eye and is therefore suitable for the application of a toric surface to correct corneal astigmatism.

Serial dark soliton for 100-Gb/s applications

We analyze the performance through numerical simulations of a new modulation format: serial dark soliton (SDS) for wide-area 100-Gb/s applications. We compare the performance of the SDS with conventional dark soliton, amplitude-modulation phase-shift keying (also known as duobinary), nonreturn-to-zero, and return-to-zero modulation formats, when subjected to typical wide-area-network impairments. We show that the SDS has a strong chromatic dispersion and polarization-mode-dispersion tolerance, while maintaining a compact spectrum suitable for strong filtering requirement in ultradense wavelength-division-multiplexing applications. The SDS can be generated using commercially available components for 40-Gb/s applications and is cost efficient when compared with other 100-Gb/s electrical-time-division-multiplexing systems.

Effect of maternal protein restriction during pregnancy and postweaning high-fat feeding on diet-induced thermogenesis in adult mouse offspring

Purpose: Prenatal undernutrition followed by postweaning feeding of a high-fat diet results in obesity in the adult offspring. In this study, we investigated whether diet-induced thermogenesis is altered as a result of such nutritional mismatch. Methods: Female MF-1 mice were fed a normal protein (NP, 18 % casein) or a protein-restricted (PR, 9 % casein) diet throughout pregnancy and lactation. After weaning, male offspring of both groups were fed either a high-fat diet (HF; 45 % kcal fat) or standard chow (C, 7 % kcal fat) to generate the NP/C, NP/HF, PR/C and PR/HF adult offspring groups (n = 7-11 per group). Results: PR/C and NP/C offspring have similar body weights at 30 weeks of age. Postweaning HF feeding resulted in significantly heavier NP/HF offspring (P <0.01), but not in PR/HF offspring, compared with their chow-fed counterparts. However, the PR/HF offspring exhibited greater adiposity (P <0.01) v the NP/HF group. The NP/HF offspring had increased energy expenditure and increased mRNA expression of uncoupling protein-1 and β-3 adrenergic receptor in the interscapular brown adipose tissue (iBAT) compared with the NP/C mice (both at P <0.01). No such differences in energy expenditure and iBAT gene expression were observed between the PR/HF and PR/C offspring. Conclusions: These data suggest that a mismatch between maternal diet during pregnancy and lactation, and the postweaning diet of the offspring, can attenuate diet-induced thermogenesis in the iBAT, resulting in the development of obesity in adulthood. © 2014 Springer-Verlag Berlin Heidelberg.

Среда за обучение по софтуерни технологии

Доклад, поместен в сборника на Националната конференция "Образованието в информационното общество", Пловдив, май 2011 г.

Nők a vállalati vezetőtestületekben és irányításban Magyarországon

Magyarországon napjainkra többszörösen is paradox helyzet állt elő: egyrészt az utóbbi évtizedekben a fiatal női korosztályok képzettsége egyértelműen túlszárnyalja a férfiakét, mégsem tudják azt kamatoztatni a gazdasági élet vezető pozícióiban. Másrészt, míg húsz - huszonöt évvel ezelőtt európai összehasonlításban meglehetősen magas volt a női vezetők aránya Magyarországon, ez a viszonylagosan jó helyzet megszűnt. A tanulmány a nők útjában álló legfontosabb, összetett strukturális és kulturális tényezőket foglalja össze. A statisztikai és kvantitatív szociológiai adatgyűjtéseken túl a Szerző bemutatja a női vezetők elfogadottságára vonatkozó legfontosabb kvalitatív eredményeit. Ezek a magyar társadalom tradicionális nemi viszonyrendszeréről árulkodnak.

Multimedia Training: Why Some use it and Some Do Not

Forms of interactive multimedia, including CD-ROM, DV-I, Laserdisc, and virtual reality, have given a new perspective to training in many industries. As the hospitality industry and other service industries continue to grow, these forms of technology are becoming of increasing interest as organizations strive to deliver more efficient and effective services to customers and employees

The Beacon, March 25, 2011

Vol. 22, Issue 28, 8 pages

O PROCESSO FORMATIVO E A ATUAÇÃO DO ARTE-EDUCADOR: POSSIBILIDADES E CONTRIBUIÇÕES DA TEORIA IRONISTA

A presente pesquisa visa a revisão bibliográfica do processo formativo e, ao mesmo tempo, a investigação e problematização da atuação contemporânea do educador ironista na Educação. O autor Imanol Aguirre, concebe este título ao educador que seja provocativo, inteirado e propositor de experiências estéticas frente às complexidades contemporâneas, amalgamadas num tecido histórico-social caracterizado pelo trânsito da pluralidade, dos imaginários, da construção de identidade e da mobilidade social. O ironista atua dialogicamente “in loco” criando respostas às variadas demandas com os seus educandos. A fomentação da crítica, a mobilização da dúvida e da ironia, a conexão dos territórios das competências e habilidades, são os objetivos pelos quais o educador ironista intenciona um cenário educacional mais efetivo e emancipador ante as reais necessidades contemporâneas

Ciudadanos en defensa del patrimonio mundial: el caso de la Mezquita de Córdoba

La Mezquita de Córdoba fue reconocida por Unesco en 1984 como Patrimonio Mundial por constituir la obra cumbre del arte islámico y andalusí en Europa y ser paradigma universal de concordia entre culturas. Construida en el año 785 por Abderramán I, en 1523 Carlos I autoriza edificar en su interior una Catedral renacentista que rompió la infinitud del bosque de columnas al tiempo que precipitó un mestizaje sin precedentes del islam y el cristianismo. Ambas realidades artísticas, históricas y culturales han convivido durante siglos en Córdoba hasta que en 1998, el Cabildo catedralicio, sus actuales gestores, se propusieron borrar la huella andalusí de todos los documentos oficiales de divulgación hasta el punto de eliminar el nombre de Mezquita y suprimir toda alusión a la arquitectura y herencia omeya de un monumento que es conocido en todo el mundo como el edificio andalusí emblemático por excelencia. En un acto de intolerancia y expolio cultural, el Obispado pretendió roclamar la supremacía católica sobre el Islam a costa del sentido común, de la historia, del arte, de la arquitectura y de la memoria de Córdoba y su significado en el mundo. En febrero de 2014, un grupo de ciudadanos cordobeses organizados como “Plataforma Mezquita-Catedral, Patrimonio de Tod@s” lanzó una campaña de denuncia que ha logrado reunir más de 385.000 firmas para reclamar la restitución del nombre y la memoria del universal monumento y exigir una gestión profesional. Entre los firmantes, se encuentran personalidades de la cultura de la talla de Juan Goytisolo, José Manuel Caballero Bonald, Emilio Lledó, Josefina Molina, Antonio Muñoz Molina, Antonio Gala, Rosa Montero, Norman Foster, Eduardo Galeano, Federico Mayor Zaragoza, Manolo Sanlúcar, José Chamizo y muchos otros de reconocido prestigio. La Plataforma ciudadana estima que la actual gestión de la Mezquita-Catedral de Córdoba es profundamente lesiva para la integridad del monumento, desleal con su historia, ofensiva con la memoria de Córdoba y contraria a los valores fundamentales sobre los que la Unesco la reconoció en 1984 como Patrimonio Mundial.

Representation of Maximally Regular Textures in Human Visual Cortex

Copyright © 2016 the authors 0270-6474/16/360714-16$15.00/0. This research was supported by National Science Foundation INSPIRE Grant 1248076, which was awarded to Y.L. and A.M.N.

Changes in [18F]Fluoro-2-deoxy-D-glucose incorporation induced by doxorubicin and anti-HER antibodies by breast cancer cells modulated by co-treatment with metformin and its effects on intracellular signalling

Peer reviewed