A Versatile Simulation Environment of FTC Architectures for Large Transport Aircraft

We present a simulation environment with 3-D stereo visualization facilities destined for an easy setup and versatile assessment of fault detection and diagnosis based fault tolerant control systems. This environment has been primarily developed as a technology demonstrator of advanced reconfigurable flight control systems and is based on a realistic six degree of freedom flexible aircraft model. The aircraft control system architecture includes a flexible fault detection and diagnosis system and a reconfigurable nonlinear dynamic inversion based controller, able to handle different fault situations

Super Critical Carbon Dioxide Metal Working Fluid Delivery System

ME450 Capstone Design and Manufacturing Experience: Winter 2008Currently metal working fluids (MWF) are used worldwide to provide lubrication and cooling in metal machining operations. Aqueous MWFs are composed of water, oil and surfactants. These fluids are very expensive and require extensive pumping systems to deliver MWF around a manufacturing plant. Further, they are harmful to both the environment and workers and disposal of these fluids is very expensive. Recently a MWF composed of supercritical Carbon Dioxide (scCO2) and dissolved soybean oil has been created. This system substantially reduces the environmental and worker impact while providing better lubricity and cooling in machining operations. The goals of our project are enhance the current system by: 1) increasing the flow rate for high intensity machining operations 2) designing a method for determining the oil level in the pressure vessel 3) designing a new subsystem that will continuously deliver oil 4) designing a control that can be used to vary the MWF mixtureSteve Skerloshttp://deepblue.lib.umich.edu/bitstream/2027.42/58675/1/me450w08project26_report.pd

An ancient pathway combining carbon dioxide fixation with the generation and utilization of a sodium ion gradient for ATP synthesis

Synthesis of acetate from carbon dioxide and molecular hydrogen is considered to be the first carbon assimilation pathway on earth. It combines carbon dioxide fixation into acetyl-CoA with the production of ATP via an energized cell membrane. How the pathway is coupled with the net synthesis of ATP has been an enigma. The anaerobic, acetogenic bacterium Acetobacterium woodii uses an ancient version of this pathway without cytochromes and quinones. It generates a sodium ion potential across the cell membrane by the sodium-motive ferredoxin:NAD oxidoreductase (Rnf). The genome sequence of A. woodii solves the enigma: it uncovers Rnf as the only ion-motive enzyme coupled to the pathway and unravels a metabolism designed to produce reduced ferredoxin and overcome energetic barriers by virtue of electron-bifurcating, soluble enzymes

Analysis of Kapitza-Dirac diffraction patterns beyond the Raman-Nath regime

We study Kapitza-Dirac diffraction of a Bose-Einstein condensate from a standing light wave for a square pulse with variable pulse length but constant pulse area. We find that for sufficiently weak pulses, the usual analytical short-pulse prediction for the Raman-Nath regime continues to hold for longer times, albeit with a reduction of the apparent modulation depth of the standing wave. We quantitatively relate this effect to the Fourier width of the pulse, and draw analogies to the Rabi dynamics of a coupled two-state system. Our findings, combined with numerical modeling for stronger pulses, are of practical interest for the calibration of optical lattices in ultracold atomic systems

Micromachine d'essais mécaniques de type traction et compression ayant une accessibilité optimisée

L'invention concerne une micromachine de traction destinée à être utilisée dans une enceinte de microscope électronique à balayage ou avec un appareil de diffraction, comportant deux mors (1) portés par deux supports, chaque mors (1) étant destiné à recevoir une extrémité d'une éprouvette mécanique (4), et des moyens pour exercer sur les supports des efforts tendant à les écarter l'un de l'autre ou à les rapprocher l'un de l'autre selon une direction longitudinale (AL), chaque mors (1) comprenant une embase (2) et une bride (3) pour fixer une extrémité (21) d'éprouvette (4) au mors (1) en l'enserrant entre la bride (3) et l'embase (2) au moyen d'au moins deux vis (12-15 ) traversant chacune la bride (3) et au moins une partie de l'embase (2), ces deux vis (12-15) étant situées de part et d'autre de l'extrémité d'éprouvette (21)

Evaluation of the efficiency of fungicides in controlling foliage soybean diseases in Tucumán, Argentina

Las enfermedades de la soja [Glycine max (L.) Merr.] constituyen un factor limitante de la producción cuando el cultivo se desarrolla bajo sistemas de manejo y condiciones ambientales favorables al desarrollo y dispersión de patógenos que lo afectan. Este trabajo muestra los resultados de cuatro años de evaluación a campo de la eficiencia del control químico de las enfermedades de fin de ciclo y la roya asiática de la soja, utilizando diferentes ingredientes activos y momentos de aplicación. Los ensayos se realizaron sobre A 8000 RG, grupo de maduración VIII, en la localidad de Puesto del Medio, departamento Burruyacú (Tucumán), durante las campañas 2007/2008, 2008/2009, 2009/2010 y 2010/2011. Los ingredientes activos evaluados fueron: flutriafol, pyraclostrobin + epoxiconazole, trifloxistrobin + cyproconazole, azoxistrobina + cyproconazole, picoxistrobin + cyproconazole, metominostrobin + tebuconazole, carbendazim + tebuconazole y cyproconazole + difenoconazole. Se aplicaron en los estadios fenológicos R3, R5 o R3+R5. Los parámetros evaluados fueron: severidad de las enfermedades (en R6), persistencia foliar (a inicios de R7), rendimiento del cultivo (kg/ha), peso de 1000 semillas (g), emergencia radicular (%) y porcentaje de infección en semillas. En la campaña 2007/2008, todos los tratamientos superaron al testigo en rendimiento y peso de 1000 semillas, presentando también menores niveles de enfermedad. No se detectaron diferencias significativas en el rendimiento y peso de 1000 semillas entre los tratamientos durante la campaña 2008/2009. Para las campañas 2009/2010 y 2010/2011, el tratamiento azoxistrobina + cyproconazole en R5 se diferenció del testigo en el rendimiento; en peso de 1000 semillas, trifloxistrobin + cyproconazole (R3) y azoxistrobina + cyproconazole (R3 y R5) se diferenciaron estadísticamente del testigo en la campaña 2009/2010, pero no se observaron diferencias para la campaña 2010/2011. En conclusión, la aplicación de fungicidas disminuyó los porcentajes de patógenos en la semilla, mejoró la emergencia radicular e incrementó los rendimientos de los cultivos, confirmando que existen ingredientes activos eficaces para el manejo de dichas patologías.Diseases may severely restrain soybean [Glycine max (L.) Merr.] production, especially when crops are grown under management systems and environmental conditions that favor the development and spread of pathogens. This paper reports the results of field trials which were conducted throughout four growing seasons, in order to evaluate the efficiency of different active ingredients and application timings in controlling diseases that affect soybean aerial parts, especially the late-season disease complex and Asian soybean rust. The trials were planted with A 8000 RG, a soybean cultivar from maturity group VIII, in Puesto del Medio, Burruyacú (Tucumán province), and were assessed during the 2007/2008, 2008/2009, 2009/2010 and 2010/2011 growing seasons. Evaluated active ingredients were flutriafol, pyraclostrobin + epoxiconazole, trifloxystrobin + cyproconazole, azoxystrobin + cyproconazole, picoxystrobin + cyproconazole, metominostrobin + tebuconazole, carbendazim + tebuconazole and cyproconazole + difenoconazole. Treatments were applied at R3, R5 or R3+R5 phenological states. Parameters assessed were: disease severity (at R6), foliar persistence (at early R7), crop yield (kg/ha), 1000-seed weight (g), seed emergence and seed infection (%). In the 2007/2008 season, all treatments were superior to the untreated control for disease control, crop yield, and 1000-seed weight. No statistically significant differences were found among treatments for yield and 1000-seed weight in the 2008/2009 season, whereas in the 2009/2010 and 2010/2011 seasons the only treatment that differed from the control in crop yield was the azoxystrobin + cyproconazole mix at R5. The trifloxystrobin + cyproconazole (at R3) and azoxystrobin + cyproconazole treatments (both at R3 and R5) differed from the control as regards 1000-seed weight in the 2009/2010 season, but no statistically significant differences were found among treatments in relation to this parameter in the 2010/2011 season. Fungicide applications generally decreased seed fungal infection, improved root emergence and increased crop yield, confirming that there are efficient active ingredients for the management of these diseases.Fil: Ploper, Leonardo Daniel. Gobierno de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial Obispo Colombres; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tucumán. Instituto de Tecnología Agroindustrial del Noroeste Argentino; Argentina; ArgentinaFil: González, Victoria. Gobierno de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial Obispo Colombres; ArgentinaFil: Reznikov, Sebastian. Gobierno de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial Obispo Colombres; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tucumán. Instituto de Tecnología Agroindustrial del Noroeste Argentino; Argentina; ArgentinaFil: Hecker, Luis. Gobierno de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial Obispo Colombres; ArgentinaFil: de Lisi, Vicente. Gobierno de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial Obispo Colombres; ArgentinaFil: Henríquez, Diego D.. Gobierno de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial Obispo Colombres; ArgentinaFil: Stegmayer, Carlos A.. Gobierno de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial Obispo Colombres; ArgentinaFil: Devani, Mario R.. Gobierno de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial Obispo Colombres; Argentin

Complete genome sequence of Staphylococcus aureus 6850, a highly cytotoxic and clinically virulent Methicillin-sensitive strain with distant relatedness to prototype strains

Staphylococcus aureus is a frequent human commensal bacterium and pathogen. Here we report the complete genome sequence of strain 6850 (spa type t185; sequence type 50 [ST50]), a highly cytotoxic and clinically virulent methicillin-sensitive strain from a patient with complicated S. aureus bacteremia associated with osteomyelitis and septic arthritis