Strong F-regularity and generating morphisms of local cohomology modules

We establish a criterion for the strong F-regularity of a (non-Gorenstein) Cohen-Macaulay reduced complete local ring of dimension at least 2, containing a perfect field of prime characteristic p. We also describe an explicit generating morphism (in the sense of Lyubeznik) for the top local cohomology module with support in certain ideals arising from an n×(n−1) matrix X of indeterminates. For p≥5, these results led us to derive a simple, new proof of the well-known fact that the generic determinantal ring defined by the maximal minors of X is strongly F-regular

Equation of state for Universe from similarity symmetries

In this paper we proposed to use the group of analysis of symmetries of the dynamical system to describe the evolution of the Universe. This methods is used in searching for the unknown equation of state. It is shown that group of symmetries enforce the form of the equation of state for noninteracting scaling multifluids. We showed that symmetries give rise the equation of state in the form $p=-\Lambda+w_{1}\rho(a)+w_{2}a^{\beta}+0$ and energy density $\rho=\Lambda+\rho_{01}a^{-3(1+w)}+\rho_{02}a^{\beta}+\rho_{03}a^{-3}$, which is commonly used in cosmology. The FRW model filled with scaling fluid (called homological) is confronted with the observations of distant type Ia supernovae. We found the class of model parameters admissible by the statistical analysis of SNIa data. We showed that the model with scaling fluid fits well to supernovae data. We found that $\Omega_{\text{m},0} \simeq 0.4$ and $n \simeq -1$ ($\beta = -3n$), which can correspond to (hyper) phantom fluid, and to a high density universe. However if we assume prior that $\Omega_{\text{m},0}=0.3$ then the favoured model is close to concordance $\Lambda$CDM model. Our results predict that in the considered model with scaling fluids distant type Ia supernovae should be brighter than in $\Lambda$CDM model, while intermediate distant SNIa should be fainter than in $\Lambda$CDM model. We also investigate whether the model with scaling fluid is actually preferred by data over $\Lambda$CDM model. As a result we find from the Akaike model selection criterion prefers the model with noninteracting scaling fluid.Comment: accepted for publication versio

Surgical Gastrostomy: Current Indications And Complications In A University Hospital [gastrostomia Cirúrgica: Indicações Atuais E Complicações Em Pacientes De Um Hospital Universitário]

Objective: To analyze the surgical gastrostomies performed at a public University Hospital, their indications and complications. Methods: We conducted a retrospective, nonrandomized review of medical records of patients who underwent surgical gastrostomy from 2007 to 2011; Results:, In the period of studied, 86 patients underwent surgical gastrostomies for enteral nutrition. The Stamm technique was employed in all cases. Men constituted 76 (88%) of the cases and the mean age was 58.4 years, the maximum age being 87 years and the minimum 19. We observed 16 (18.60%) minor complications, 17 (19.76%) serious complications and 8 (9.3%) perioperative deaths. Conclusion: Surgical gastrostomy, while considered a smaller procedure, is not without complications and mortality. The Stamm technique, despite the complications reported, is easy to perform and to handle, as well as safe.406458462Witzel, O., Zur technik der magenfistulaeinlegung (1891) Zbl Chir, 18, pp. 601-604Stamm, M., Gastrostomy: A new method (1894) Med News, 65, p. 324Grant, J.P., Comparison of percutaneous endoscopic gastrostomy with Stamm gastrostomy (1988) Ann Surg, 207 (5), pp. 598-603Gauderer, M.W., Ponsky, J.L., Izant Jr., R.J., Gastrostomy without laparoscopy: A percutaneous endoscopic technique (1980) J Pediatr Surg, 15 (6), pp. 872-875Kwon, R.S., Banerjee, S., Desilets, D., Diehl, D.L., Farraye, F.A., Enteral nutrition access devices (2010) Gastrointest Endosc, 72 (2), pp. 236-248. , ASGE Technology CommitteeHerman, L.L., Hoskins, W.J., Shike, M., Percutaneous endoscopic gastrostomy for decompression of the stomach and small bowel (1992) Gastrointest Endosc, 38 (3), pp. 314-318Möller, P., Lindberg, C.G., Zilling, T., Gastrostomy by various techniques: Evaluation of indications, outcome, and complications (1999) Scand J Gastroenterol, 34 (10), pp. 1050-1054Wollman, B., D'Agostino, H.B., Walus-Wigle, J.R., Easter, D.W., Beale, A., Radiologic, endoscopic, and surgical gastrostomy: An institutional evaluation and meta-analysis of the literature (1995) Radiology, 197 (3), pp. 699-704Ljungdahl, M., Sundbom, M., Complication rate lower after percutaneous endoscopic gastrostomy than after surgical gastrostomy: A prospective, randomized trial (2006) Surg Endosc, 20 (8), pp. 1248-1251Pisano, G., Calò, P.G., Tatti, A., Farris, S., Erdas, E., Licheri, S., Surgical gastrostomy when percutaneous endoscopic gastrostomy is not feasible: Indications, results and comparison between the two procedures (2008) Chir Ital, 60 (2), pp. 261-266Martins, F.P., Sousa, M.C.B., Ferrari, A.P., New "introducer" PEG-gastropexy with T fasteners: A pilot study (2011) Arq Gastroenterol, 48 (4), pp. 231-235Ocaña, L.F.O., Crocifoglio, V.A., La gastrostomía laparoscópica como una alternative a la gastrostomía endoscópica percutánea (1995) Rev Gastroenterol Mex, 60 (4), pp. 218-220Bergstrom, L.R., Larson, D., Zinsmeister, A.R., Sarr, M.G., Silverstein, M.D., Utilization and outcomes of surgical gastrostomies and jejunostomies in an era of percutaneous endoscopic gastrostomy: A population- based study (1995) Mayo Clin Proc, 70 (9), pp. 829-836Nicholson, F.B., Korman, M.G., Richardson, M.A., Percutaneous endoscopic gastrostomy: A review of indications, complications and outcome (2000) J Gastroenterol Hepatol, 15 (1), pp. 21-25Shellito, P.C., Malt, R.A., Tube gastrostomy. Techniques and complications (1985) Ann Surg, 201 (2), pp. 180-185Cox, W.D., Gillesby, W.J., Gastrostomy in postoperative decompression: Indications and methods (1967) Am J Surg, 113 (2), pp. 298-302Cosentini, E.P., Sautner, T., Gnant, M., Winkelbauer, F., Teleky, B., Jakesz, R., Outcomes of surgical, percutaneous endoscopic, and percutaneous radiologic gastrostomies (1998) Arch Surg, 133 (10), pp. 1076-1083Rustom, I.K., Jebreel, A., Tayyab, M., England, R.J., Stafford, N.D., Percutaneous endoscopic, radiological and surgical gastrostomy tubes: A comparison study in head and neck cancer patients (2006) J Laryngol Otol, 120 (6), pp. 463-466Grilo, A., Santos, C.A., Fonseca, J., Percutaneous endoscopic gastrostomy for nutritional palliation of upper esophageal cancer unsuitable for esophageal stenting (2012) Arq Gastroenterol, 49 (3), pp. 227-231Zorrón, R., Flores, D., Meyer, C.A.F., Castro, L.M., Madureira, F.A.V., Madureira, F.D., Single-wound gastrostomy: A simple method as an option for endoscopy (2005) Rev Col Bras Cir, 32 (3), pp. 153-15

High Verdet Constant Ga:s:la:o Chalcogenide Glasses For Magneto-optical Devices

The magneto-optical rotation at room temperature was measured for three Ga:S:La:O chalcogenide glasses at several laser lines in the visible. The first sample was a binary system constituted by 70 mol % Ga2S3 and 30 mol % La2O3, whereas in the second and third ones the lanthanum oxide was partially substituted by lanthanum sulfide, keeping the amount of gallium sulfide fixed. A pulsed magnetic field between 50 and 80 kG was used for the Faraday rotation measurements. The Verdet constant for one of the ternary samples was found to be as high as 0.205 min G-1 cm-1 at 543 nm, indicating that these chalcogenide glasses are very promising for magneto-optical applications. The data for each sample were fitted using the expected analytical expression for the magneto-optical dispersion. Measurements of the refractive index of the glasses at 632.8 nm are also reported. Data on the magneto-optical properties of two high Verdet constant, heavy-metal oxide diamagnetic glasses are also included for comparison. © 1999 Society of Photo-optical Instrumentation Engineers.382214219Schweizer, T., Hewark, D.W., Payne, D.N., Jensen, T., Huber, G., Rare-earth doped chalcogenide glass laser (1996) Electron. Lett., 32 (7), pp. 666-667Hewark, D.W., Samson, B.N., Medeiros Neto, J.A., Laming, R.I., Payne, D.N., Emission at 1.3 μm from dysprosium-doped GaLaS glass (1994) Electron. Lett., 30 (12), pp. 968-970Kumta, P.N., Risbud, S.H., Rare-earth chalcogenides - An emerging class of optical materials (1994) J. Mater. Sci., 29 (5), pp. 1135-1157De Araujo, M.T., Vermelho, M.V.D., Gouveia Neto, A.S., Sombra, A.S., Medeiros Neto, J.A., Efficient second harmonic generation in praseodymium doped Ga:La:S glass for 1.3 μm optical fiber amplifiers (1996) IEEE Photonics Technol. Lett., 8 (6), pp. 821-823Schulz, P.A., Wavelength independent Faraday isolator (1989) Appl. Opt., 28 (20), pp. 4458-4464Wunderlich, J.A., DeShazer, L.G., Visible optical isolator using ZnSe (1977) Appl. Opt., 16 (6), pp. 1584-1587Gauthier, D.J., Narum, P., Boyd, R.W., Simple, compact, high-performance permanent-magnet Faraday isolator (1986) Opt. Lett., 11 (10), pp. 623-625Malecki, J., Surma, M., Gibalewickz, J., Measurements of the intensity of transient magnetic fields by the Faraday effect (1957) Acta Phys. Pol., 16 (1-2), pp. 151-156Deeter, M.N., Rose, A.H., Day, G.W., Fast, sensitive magnetic field sensors based on the Faraday effect in YIG (1990) J. Lightwave Technol., 8 (12), pp. 1838-1842Rose, A.H., Deeter, M.N., Day, G.W., Submicroampere-perroot-hertz current sensor based on the Faraday effect in Ga:YIG (1993) Opt. Lett., 18 (17), pp. 1471-1473Ning, Y.N., Jackson, D.A., Faraday effect optical current clamp using a bulk-glass sensing element (1993) Opt. Lett., 18 (10), pp. 835-837Pistoni, N.C., Martinelli, M., Vibration-insensitive fiber-optic current sensor (1993) Opt. Lett., 18 (4), pp. 314-316Wilson, D.K., Optical isolators adapt to communication needs (1991) Laser Focus World, 27 (4), pp. 175-180Balbin Villaverde, A., Munin, E., Pedroso, C.B., Linear displacement sensor based on the magneto-optical Faraday effect (1998) Sens. Actuators A, 70, pp. 211-218Munin, E., Balbin Villaverde, A., Magneto-optical rotatory dispersion of some non-linear crystals (1991) J. Phys.: Condens. Matter, 3 (27), pp. 5099-5106Munin, E., Roversi, J.A., Balbin Villaverde, A., Faraday effect and energy gap in optical materials (1992) J. Phys. D, 25 (11), pp. 1635-1639Boswarva, I.M., Howard, R.E., Lidiard, A.B., Faraday effect in semiconductors (1962) Proc. R. Soc. London, Ser. A, 269, pp. 125-141Balkanski, M., Amzaliag, E., Langer, D., Interband Faraday rotation of II-IV compounds (1966) J. Phys. Chem. Solids, 27, pp. 299-308Ramaseshan, S., Determination of the magneto-optic anomaly of some glasses (1946) Proc.-Indian Acad. Sci., Sect. A, 24, pp. 426-432Cole, H., Magneto-optic effects in glass I. Some preliminary observations on the application of magneto-optic properties to structural considerations (1950) J. Soc. Glass Technol., 34, pp. 220-237Sivaramakrishnan, V., Dispersion of Faraday rotation in some optical glasses (1957) J. Ind. Inst. Sci., A39, pp. 19-26Borrelli, N.F., Faraday rotation in glasses (1964) J. Chem. Phys., 41 (11), pp. 3289-3293Balbin Villaverde, A., Vasconcellos, E.C.C., Magnetooptical dispersion of HOYA glasses: AOT-5, AOT-44B and FR-5 (1982) Appl. Opt., 21 (8), pp. 1347-1348Borrelli, N.F., Dumbaugh, W.H., Electro- and magneto-optic effects in heavy metal oxide glasses (1987) Infrared Optical Materials and Fibers, Proc. SPIE, 843, pp. 6-9Pedroso, C.B., Munin, E., Balbin Villaverde, A., Aranha, N., Solano Reynoso, V.C., Barbosa, L.C., Magnetooptical rotation of heavy-metal oxide glasses (1998) J. Non-Cryst. Solids, 271, pp. 134-142Petrovskii, G.T., Edelman, I.S., Zarubina, T.V., Malakhovskii, A.V., Zabluda, V.N., Ivanov, M.Yu., Faraday effect and spectral properties of high-concentrated rare earth oxide glasses in visible and near UV region (1991) J. Non-Cryst. Solids, 130 (1), pp. 35-40Barnes, N.P., Petway, L.B., Variation of the Verdet constant with temperature of terbium gallium garnet (1992) J. Opt. Soc. Am. B, 9 (10), pp. 1912-1915Van Den Tempel, C.M.N., Model of a new temperature-compensated optical current sensor using Bi12SiO20 (1993) Appl. Opt., 32 (25), pp. 4869-4874Darwin, C.G., Watson, W.H., The constant of the magnetic dispersion of light (1927) Proc. R. Soc. London, Ser. A, 114, pp. 474-490Ramaseshan, S., The Faraday effect and magneto-optic anomaly of some cubic crystals (1948) Proc.-Indian Acad. Sci., Sect. A, 28, pp. 360-369Munin, E., Pedroso, C.B., Balbin Villaverde, A., Magneto-optical constants of fluoride optical crystals and other AB2 and A2B type compounds (1996) J. Chem. Soc., Faraday Trans., 92 (15), pp. 2753-2757(1974) Hoya Faraday Rotator Glass Report, , Hoya Optics Inc., TokyoYoshino, T., Compact and highly efficient Faraday rotators using relatively low Verdet constant Faraday materials (1980) Jpn. J. Appl. Phys., 19 (4), pp. 745-749Jenkins, F.A., White, H.E., (1957) Fundamentals of Optics, 3rd Ed., p. 491. , McGraw-Hill, New Yor

Vascular Flora Of The Legado Das Águas, Reserva Votorantim, Municipalities Of Tapiraí, Miracatú And Juquiá, São Paulo, Brazil

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)We present a list of vascular plants found in Legado das Águas, Reserva Votorantim, a private reserve having an area of approximately 35,000 ha that spans the municipalities of Tapiraí, Miracatú, and Juquiá, in the state of São Paulo, Brazil. The reserve is part of a complex of state-protected areas including Alto Ribeira Touristic State Park, Intervales State Park, Carlos Botelho State Park, Jurupará State Park, and Serra do Mar State Park. Together, these form an important and large area of continuous and well-preserved forest. Our study, which involved two main floristic surveys in March/April 2013 and April 2014, recorded 768 species, representing 131 families and 432 genera. The majority of species were angiosperms (619) representing 106 families and 370 genera. There were also two species of gymnosperms belonging to two genera in separate families; 147 species of ferns and lycophytes belonging to 23 families and 60 genera. In demonstrating the presence of almost 800 species of plants, of which 16 are threatened, our study highlights the importance of floristic surveys and the critical role of private protected areas in managing and preserving native flora. © 2016 Check List and Authors.1262011/22923-8, FAPESP, Fundação de Amparo à Pesquisa do Estado de São Paulo2015/9444-4, FAPESP, Fundação de Amparo à Pesquisa do Estado de São PauloFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP

Nitrogen fertilization strategies for xaraes and tifton 85 grasses irrigated in the dry season

An experiment was carried out to assess rates and nitrogen fertilization strategies on the forage yield using irrigation to supply the water deficit during the dry season. The grasses Cynodon spp cv. tifton 85 and Brachiaria brizantha cv. Xaraés were cultivated with nitrogen (N) at levels of 200 and 400 kg/ha according to strategies: 1) half dose applied during the rainy season (RS) and half during the dry season (DS); 2) 1/3 during the RS and 2/3 during the DS; 3) 2/3 during the RS and 1/3 during the DS; 4) all doses applied during the DS. In each season the dose was divided in three applications. Eleven harvests were conducted: six in the RS and five in the DS. When 2/3 of N was applied in the DS, forage yield in this period was statistically equivalent to those obtained in the RS in three of the five harvests for both 200 and 400 kg/ha of N. With 100% of N applied in the DS, the yield of four of five cuts of forage was similar to that obtained in the RS for both rates of N. The strategy of applying more N in the DS rather than in the RS was effective, keeping the yield steadily throughout the year. The application of 100% of the dose of 200 kg/ha N and 2/3 of the dose of 400 kg/ha N both in the dry period, under irrigation, promote uniform productions per harvest throughout the year

Evaluation of chromium concentration in cattle feces using different acid digestion and spectrophotometric quantification techniques

The objective of this work was to evaluate combinations between acid digestion techniques and spectrophotometric quantification to measure chromium concentration in cattle feces. Digestion techniques were evaluated based on the use of nitric and perchloric acids, sulfuric and perchloric acids, and phosphoric acid. The chromium quantification in the solutions was performed by colorimetry and by atomic absorption spectrophotometry (AAS). When AAS was used, the addition of calcium chloride to the solutions as a releasing agent was also evaluated. Several standard samples containing known chromium contents were produced (0, 2, 4, 6, 8 and 10g of chromium per kg of feces) using cattle feces obtained from three different animals to evaluate the accuracy of the different combinations of techniques. The accuracy was evaluated by adjusting a simple linear regression model of the estimated values on the actual values of chromium content in the standard samples. Regardless of the digestion technique, the chromium content estimates in the standard samples obtained by colorimetry were not accurate (P0.05). The use of the digestion technique in phosphoric acid provided incomplete recovery of the fecal chromium (P0.05) fecal chromium contents