Giant change in IR light transmission in La_{0.67}Ca_{0.33}MnO_{3} film near the Curie temperature: promising application in optical devices

Transport, magnetic, magneto-optical (Kerr effect) and optical (light absorption) properties have been studied in an oriented polycrystalline La_{0.67}Ca_{0.33}MnO_{3} film which shows colossal magneto-resistance. The correlations between these properties are presented. A giant change in IR light transmission (more than a 1000-fold decrease) is observed on crossing the Curie temperature (about 270 K) from high to low temperature. Large changes in transmittance in a magnetic field were observed as well. The giant changes in transmittance and the large magneto-transmittance can be used for development of IR optoelectronic devices controlled by thermal and magnetic fields. Required material characteristics of doped manganites for these devices are discussed.Comment: 7 pages, 7 figures, submitted to J. Appl. Phy

Use of Non-distractive Testing AU-E Technology to Evaluate Hearth Conditions at CherMK–SEVERSTAL

Intensive operation of blast furnace allows increase in production of hot metal and profitability of Iron & Steel Works. However, blast furnace life could be sacrificed if no measures are taken to protect refractory lining and to build stable accretion. CherMK and Hatch developed a systematic approach to monitor conditions of BF hearth lining using Acousto Ultrasonic-Echo (AU-E) non-destructive testing developed by Hatch. Multiple testing of blast furnaces revealed problematic areas with accelerated refractory deterioration and minimal thickness, formation of elephant foot, extent of accretion and speed of refractory wear, cracks and other anomalies. Improvement in coke quality, periodical staves washing, the addition of titania, grouting, etc., were recommended and implemented to prolong furnace life while maintaining the intensity of furnace operation. Keywords: blast furnace inspection and monitoring, non-destructive testing (NDT), refractory deterioration, blast furnace campaig

Psi-Series Solution of Fractional Ginzburg-Landau Equation

One-dimensional Ginzburg-Landau equations with derivatives of noninteger order are considered. Using psi-series with fractional powers, the solution of the fractional Ginzburg-Landau (FGL) equation is derived. The leading-order behaviours of solutions about an arbitrary singularity, as well as their resonance structures, have been obtained. It was proved that fractional equations of order $alpha$ with polynomial nonlinearity of order $s$ have the noninteger power-like behavior of order $\alpha/(1-s)$ near the singularity.Comment: LaTeX, 19 pages, 2 figure

Peculiaridades do crescimento do ouro-prazer para oleaginosas e seu uso na produção de ração na zona não-chernozem da Rússia

At present, gold-of-pleasure attracts wide attention due to its unpretentiousness and early maturity, high and stable yield. In Russia, edible oils are mainly obtained from sunflower seeds, soybeans, rapeseed and seeds of other oil plants (flax, mustard, castor oil plant and bird rape) and are processed in relatively small amounts. Gold-of-pleasure (Camelina sativa (L.) Crantz) in the Non-Chernozem zone of Russia is not a traditional crop. The expansion of areas for this crop sowing is constrained by the lack of developed recommendations on the technology of its cultivation. This is the basis of the research. The purpose of this experiment was to identify the features of forming gold-of-pleasure productivity and optimizing the main elements of varietal technology (seeding rate and seeding time) in the conditions of the region. The research was carried out at Ryazan State Agrotechnological University, on the experimental fields of the agrotechnological experimental station of Ryazan oblast, on gray forest soils. The object of the research is gold-of-pleasure, variety Yubilyar. It has been revealed that in order to obtain a stable yield of gold-of-pleasure, it is necessary to have at least 420-440 plants per 1 m² to harvest, and 400-450 plants per 1 m² are considered the optimal density. Increasing the seeding rate, above 8 million pcs. of the seeds / ha, led to the formation of a strongly crowded crop, which ultimately contributed to a decrease of the yield and seeds quality. The most optimal seeding rate for gold-of-pleasure is 7.0 million germinated seeds per hectare. The overestimation of the norm to 8.0 million pieces / ha did not significantly increase the yield, but led to an excessive consumption of seeds, deteriorated seed quality, the risk of lodging and diseases. The best seeding time in experiments is the first decade of May.En la actualidad, el oro del placer atrae una amplia atención debido a su falta de pretensiones y madurez temprana, rendimiento alto y estable. En Rusia, los aceites comestibles se obtienen principalmente de semillas de girasol, soja, colza y semillas de otras plantas oleaginosas (linaza, mostaza, aceite de ricino y coles) y se procesan en cantidades relativamente pequeñas. El oro del placer (Camelina sativa (L.) Crantz) en la zona de Non-Chernozem de Rusia no es un cultivo tradicional. La expansión de las áreas para esta siembra de cultivos está limitada por la falta de recomendaciones desarrolladas sobre la tecnología de su cultivo. Esta es la base de la investigación. El propósito de este experimento fue identificar las características de la formación de la productividad del oro del placer y la optimización de los elementos principales de la tecnología varietal (tasa de siembra y tiempo de siembra) en las condiciones de la región. La investigación se llevó a cabo en la Universidad Agrotecnológica Estatal de Ryazan, en los campos experimentales de la estación experimental agrotecnológica de Ryazan oblast, en suelos de bosques grises. El objeto de la investigación es el oro del placer, variedad Yubilyar. Se ha revelado que, para obtener un rendimiento estable de oro de placer, es necesario contar con al menos 420-440 plantas por cosecha de 1 m², y 400-450 plantas por 1 m² se consideran la densidad óptima. Incrementando la tasa de siembra, por encima de 8 millones de pcs. de las semillas / ha, llevó a la formación de un cultivo muy poblado, que en última instancia contribuyó a una disminución del rendimiento y la calidad de las semillas. La tasa de siembra más óptima para el oro del placer es de 7.0 millones de semillas germinadas por hectárea. La sobrestimación de la norma a 8,0 millones de piezas / ha no aumentó significativamente el rendimiento, pero condujo a un consumo excesivo de semillas, deterioro de la calidad de las semillas, el riesgo de alojamiento y enfermedades. El mejor tiempo de siembra en experimentos es la primera década de mayo.No presente, o ouro-do-prazer atrai grande atenção devido à sua despretensão e maturidade precoce, rendimento alto e estável. Na Rússia, os óleos comestíveis são obtidos principalmente a partir de sementes de girassol, soja, colza e sementes de outras plantas oleaginosas (linho, mostarda, mamona e colza) e são processados em quantidades relativamente pequenas. Ouro-do-prazer (Camelina sativa (L.) Crantz) na zona não-Chernozem da Rússia não é uma cultura tradicional. A expansão de áreas para esta semeadura de culturas é limitada pela falta de recomendações desenvolvidas sobre a tecnologia de cultivo. Esta é a base da pesquisa. O objetivo deste experimento foi identificar as características da formação da produtividade de ouro de prazer e otimizar os principais elementos da tecnologia varietal (taxa de semeadura e tempo de semeadura) nas condições da região. A pesquisa foi realizada na Universidade Agrotecnológica do Estado de Ryazan, nos campos experimentais da estação experimental agrotecnológica de Ryazan oblast, em solos de floresta cinza. O objeto da pesquisa é o ouro-do-prazer, variedade Yubilyar. Foi revelado que, para se obter um rendimento estável de ouro-de-prazer, é necessário ter pelo menos 420-440 plantas por 1 m² para a colheita, e 400-450 plantas por 1 m² são consideradas a densidade ideal. Aumentando a taxa de semeadura, acima de 8 milhões de unidades. das sementes / ha, levou à formação de uma cultura fortemente lotada, o que acabou por contribuir para a diminuição do rendimento e qualidade das sementes. A taxa de semeadura mais ideal para o ouro-do-prazer é de 7,0 milhões de sementes germinadas por hectare. A superestimação da norma para 8,0 milhões de peças / ha não aumentou significativamente o rendimento, mas levou a um consumo excessivo de sementes, deterioração da qualidade das sementes, risco de alojamento e doenças. O melhor tempo de semeadura em experimentos é a primeira década de maio

Conservation laws for multidimensional systems and related linear algebra problems

We consider multidimensional systems of PDEs of generalized evolution form with t-derivatives of arbitrary order on the left-hand side and with the right-hand side dependent on lower order t-derivatives and arbitrary space derivatives. For such systems we find an explicit necessary condition for existence of higher conservation laws in terms of the system's symbol. For systems that violate this condition we give an effective upper bound on the order of conservation laws. Using this result, we completely describe conservation laws for viscous transonic equations, for the Brusselator model, and the Belousov-Zhabotinskii system. To achieve this, we solve over an arbitrary field the matrix equations SA=A^tS and SA=-A^tS for a quadratic matrix A and its transpose A^t, which may be of independent interest.Comment: 12 pages; proof of Theorem 1 clarified; misprints correcte

Neyrodoz in the treatment of secondary premature ejaculation in patients with chronic prostatitis

Premature ejaculation (PE) is the type of sexual dysfunction, which is characterized by constant or nearly constant uncontrolled ejaculation before vaginal penentration or within minutes of the start of sexual intercourse, that causing a feeling of sexual dissatisfaction and leading to sexual frustration among the partners. It has been shown that the antimicrobial and antiinflammatory therapy of chronic prostatitis (CP) increases the duration of sexual intercourse and improves the control over the ejaculation. PE in the patients with CP may be an independent sexual disorder that may require a specific correction. Antidepressants are the first line of drugs in the treatment of PE according to the recommendations of the European Association of Urology. However, some patients refuse to intake this medicine. The aim of our study was to evaluate the clinical efficacy and safety of Neyrodoz in the treatment of PE in patients with CP.Materials and methods. The study included 32 patients (mean age 37.5 years) who have had complains on PE after the treatment of CP. All the patients were randomly selected into two groups. 1st – basic group (n = 15) and 2nd – control group (n = 17).The first group patients intook Neyrodoz 2 capsules twice a day. The second group got placebo in the same dose during 30 days.Results. The time of intravaginal latency increased from 40,8 ± 9,9 (25–56) to180,1± 41,2 (120–240) seconds in patients of the 1st group after the therapy. The score of tool-PEDT decreased from 15,8 ± 3,1 (11–20) to 3,9 ± 2,9 (0–8). The visual analogue scale (VAS) symptoms improved from 8,6 ± 1,4 (6–10) to 2,5 ± 2,1 (0–5). The time of intravaginal latency increased from 38,4 ± 10,0 (25–59) to 40,7 ± 7,4 (35–59) seconds in 14 of 17 men in the second group of patients. The score of tool-PEDT decreased from 15,6 ± 2,8 (11–20) to 14,3 ± 2,7 (12–19). The VAS symptoms improved from 8,9 ± 1,3 (6–10) to 8,5 ± 1,7 (6–10).Conclusions. Neyrodoz is an effective and safe medicine to the correction of PE in patients with CP, who did not get an effect after the treatment of CP