7,393 research outputs found
Compsoneura atopa (A.C. Sm.) A.C. Sm. from Colombia collected by W. López, J. Rodriguez, M. Salas #201
No full textFile Name: TOLI-21450-AMA-02-B12-9.jpg
CÓDIGO FOTO: TOLI-21450-AMA-02-B12-9-
Fotografía: SI
Nº TOLI: TOLI-21450
PARCELA: AMA-02
CÓDIGO: B12-9
Nº COLECTA: 201
NUEVOS COLECTORES: Wilmar López Oviedo
COLECTORES: W. López, J. Rodriguez, M. Salas
Nº MUESTRAS MONTADAS: 1
Homologación: Homologado
Nueva fecha del evento : 27/11/2018.
Fecha del evento: 01/05/2012.
Proyecto : Recursos Botánicos Disponibles en Línea (BRAVO) para la flora Colombiana
Hábitat: Bosque muy húmedo tropical (bmh-T)
Comentario del evento: Bosque de tierra firme
Continente: SA
Pais: Colombia
Estado/Provincia: Chocó
Municipio: Nuquí
Centro poblado / Cabecera municipal: Arusí
Localidad: Reserva Natural El Amargal
Elevación minima en metros: 50
Elevación maxima en metros: 300
Latitud: 5.578
Longitud original: -77.500
datum geodésico: WGS 84
Latitud decimal: 5.578
Longitud decimal: -77.500
Identificado por: Jaime Cabezas
Fecha de identificación: 20/09/2019.
Familia antigua: Myristicaceae
Especie antigua: Compsoneura atopa (A.C. Sm.) A.C. Sm.
Nombre cientifico: Compsoneura atopa (A.C. Sm.) A.C. Sm.
Reino: Plantae
Filo: Magnoliophyta
Clase: Equisetopsida
Familia nueva: Myristicaceae
genero herbario: NN
Especie de herbario para TNRS: NN
Especie corregida herbario y desde TNRS: Indet indet
Familia corregida desde TNRS: Myristicaceae
: 918
Sin nombre cientif: 1</p
Weinmannia multijuga Killip & A.C. Sm. from Colombia collected by B. Morales, J. Franco, J. Peñuela, W. López, C. Rodriguez. #236
No full textFile Name: TOLI-23769-PAS-01-8-A2-47.jpg
CÓDIGO FOTO: TOLI-23769-PAS-01-8-A2-47-
Fotografía: SI
Nº TOLI: TOLI-23769
PARCELA: PAS-01
CÓDIGO: 8-A2-47
Nº COLECTA: 236
NUEVOS COLECTORES: Brayan Alexis Morales
COLECTORES: B. Morales, J. Franco, J. Peñuela, W. López, C. Rodriguez.
Nº MUESTRAS MONTADAS: 1
Homologación: Homologado
Nueva fecha del evento : 07/01/2019.
Fecha del evento: 19/09/2019.
Proyecto : Recursos Botánicos Disponibles en Línea (BRAVO) para la flora Colombiana
Hábitat: Bosque húmedo montano (bh-M)
Continente: SA
Pais: Colombia
Estado/Provincia: Quindío
Municipio: Salento
Localidad: Reserva Natural La Patasola
Elevación minima en metros: 2328
Elevación maxima en metros: 2528
Latitud: 4.693
Longitud original: -75.543
datum geodésico: WGS 84
Latitud decimal: 4.693
Longitud decimal: -75.543
Nombre cientifico: Weinmannia multijuga Killip & A.C. Sm.
Reino: Plantae
Filo: Magnoliophyta
Clase: Equisetopsida
Orden: Oxalidales
Familia nueva: Cunoniaceae
Género nuevo: Weinmannia
especie nueva: multijuga
Autoría del nombre científico: Killip & A.C. Sm.
: Cunoniaceae
genero herbario: Weinmannia
especie herbario: multijuga
Especie de herbario para TNRS: Weinmannia multijuga
Especie corregida herbario y desde TNRS: Weinmannia multijuga
Familia corregida desde TNRS: Cunoniaceae
: 285
Weinmannia multijuga Killip & A.C. Sm. from Colombia collected by B. Morales, J. Franco, J. Peñuela, W. López, C. Rodriguez. #236
No full textFile Name: TOLI-23769-PAS-01-8-A2-47.jpg
CÓDIGO FOTO: TOLI-23769-PAS-01-8-A2-47-
Fotografía: SI
Nº TOLI: TOLI-23769
PARCELA: PAS-01
CÓDIGO: 8-A2-47
Nº COLECTA: 236
NUEVOS COLECTORES: Brayan Alexis Morales
COLECTORES: B. Morales, J. Franco, J. Peñuela, W. López, C. Rodriguez.
Nº MUESTRAS MONTADAS: 1
Homologación: Homologado
Nueva fecha del evento : 07/01/2019.
Fecha del evento: 19/09/2019.
Proyecto : Recursos Botánicos Disponibles en Línea (BRAVO) para la flora Colombiana
Hábitat: Bosque húmedo montano (bh-M)
Continente: SA
Pais: Colombia
Estado/Provincia: Quindío
Municipio: Salento
Localidad: Reserva Natural La Patasola
Elevación minima en metros: 2328
Elevación maxima en metros: 2528
Latitud: 4.693
Longitud original: -75.543
datum geodésico: WGS 84
Latitud decimal: 4.693
Longitud decimal: -75.543
Nombre cientifico: Weinmannia multijuga Killip & A.C. Sm.
Reino: Plantae
Filo: Magnoliophyta
Clase: Equisetopsida
Orden: Oxalidales
Familia nueva: Cunoniaceae
Género nuevo: Weinmannia
especie nueva: multijuga
Autoría del nombre científico: Killip & A.C. Sm.
: Cunoniaceae
genero herbario: Weinmannia
especie herbario: multijuga
Especie de herbario para TNRS: Weinmannia multijuga
Especie corregida herbario y desde TNRS: Weinmannia multijuga
Familia corregida desde TNRS: Cunoniaceae
: 2857</p
Weinmannia multijuga Killip & A.C. Sm. from Colombia collected by B. Morales, J. Franco, J. Peñuela, W. López, C. Rodriguez. #276
No full textFile Name: TOLI-23906-PAS-03-10-C11-7.jpg
CÓDIGO FOTO: TOLI-23906-PAS-03-10-C11-7-
Fotografía: SI, Sin código de parcela en la etiqueta.
Nº TOLI: TOLI-23906
PARCELA: PAS-03
CÓDIGO: 10-C11-7
Nº COLECTA: 276
NUEVOS COLECTORES: Brayan Alexis Morales
COLECTORES: B. Morales, J. Franco, J. Peñuela, W. López, C. Rodriguez.
Nº MUESTRAS MONTADAS: 1
Homologación: Homologado
Nueva fecha del evento : 07/01/2019.
Fecha del evento: 19/09/2019.
Proyecto : Recursos Botánicos Disponibles en Línea (BRAVO) para la flora Colombiana
Hábitat: Bosque húmedo montano (bh-M)
Continente: SA
Pais: Colombia
Estado/Provincia: Quindío
Municipio: Salento
Localidad: Reserva Natural La Patasola
Elevación minima en metros: 2328
Elevación maxima en metros: 2528
Latitud: 4.693
Longitud original: -75.543
datum geodésico: WGS 84
Latitud decimal: 4.693
Longitud decimal: -75.543
Nombre cientifico: Weinmannia multijuga Killip & A.C. Sm.
Reino: Plantae
Filo: Magnoliophyta
Clase: Equisetopsida
Orden: Oxalidales
Familia nueva: Cunoniaceae
Género nuevo: Weinmannia
especie nueva: multijuga
Autoría del nombre científico: Killip & A.C. Sm.
: Cunoniaceae
genero herbario: Weinmannia
especie herbario: multijuga
Especie de herbario para TNRS: Weinmannia multijuga
Especie corregida herbario y desde TNRS: Weinmannia multijuga
Familia corregida desde TNRS: Cunoniaceae
: 2991</p
A direct A.C. to A.C. regenerative frequency and voltage converter
No full textIncludes bibliographical references.The reliable variable speed operation of an a. c. machine over a wide speed range is a problem that has received attention for some time. In this thesis a system to permit such operation from a fixed frequency fixed voltage supply is proposed, under the name of the asynchronous modulation converter. This converter is of the cycloconverter family, but is force-commutated and is not synchronised with the supply frequency. The power switching element comprises a power transistor in a diode bridge, coupled to the control circuitry by opto-isolators. The output of the a-mod converter is produced by a "chopper" modulation process and this results in the harmonics present being at frequencies well removed from the fundamental. A feedback system to ensure smooth commutation of the output current from the power switches is described. This feedback system operates by sensing the rate of rise of the inductive voltage surge on the load when a switch is opened to operate a freewheel path switch
Holdup Estimation In Core Flow Using Image Processing
No full textIn this work holdup is estimated through image processing and compared with the value calculated indirectly by the correlation presented by Rodriguez et al. in [1]. The tests were performed in the multiphase-flow test facilities of the Research Centre (CENPES) of PETROBRAS, Brazil. Flow images were obtained with a high-speed video camera at 1000 fps in a 2 7/8-inch and 300 meter deep pilot-scale well, conveying a mixture of heavy crude oil (2000 mPa.s and 950 kg/m3 at 35°C) and water at several combinations of the individual flow rates. In total, four tests were carried out with 100 images each. © 2013 IEEE.334338IEEE Instrumentation and Measurement Society (I and M)Rodriguez, O.M.H., Bannwart, A.C., Experimental study on interfacial waves in vertical core flow (2006) Journal of Petroleum Science and Engineering, 54 (3-4), pp. 140-148. , DOI 10.1016/j.petrol.2006.07.007, PII S0920410506001549Bannwart, A.C., Rodriguez, O.M.H., De Carvalho, C.H.M., Wang, I.S., Vara, R.M.O., Flow patterns in heavy crude oil-water flow (2004) Journal of Energy Resources Technology, 126 (3), p. 184Bannwart, A.C., Modeling aspects of oil-water core-annular flows (2001) Journal of Petroleum Science and Engineering, 32 (2-4), pp. 127-143. , DOI 10.1016/S0920-4105(01)00155-3, PII S0920410501001553, Petroleum Production Research in BrazilBannwart, A.C., Rodriguez, O.M.H., Biazussi, J.L., Martins, F.N., Selli, M.F., De Carvalho, C.H.M., Water-assisted flow of heavy oil in a vertical pipe: Pilot-scale experiments (2011) International Journal of Chemical Reactor Engineering, 10, pp. A32Ghosh, S., Mandal, T.K., Das, G., Das, P.K., Review of oil water core annular flow (2009) Renewable and Sustainable Energy Reviews, 13 (8), pp. 1957-1965. , OctPayne, G.A., Palmer, C.M., Brill, J.P., Beggs, H.D., Evaluation of inclined-pipe, tow-phase liquid holdup and pressure-loss correlations using experimental data (1979) JPT, Journal of Petroleum Technology, 31 (9), pp. 1198-1208Aslina, S., Mazlina, S., Hassan, M.J.W., Ehsan, S.D., In-situ phase fractions for oil and water occupied in pipe (2006) International Journal of Engineering, 3 (2), pp. 248-256Oddie, G., Shi, H., Durlofsky, L.J., Aziz, K., Pfeffer, B., Holmes, J.A., Experimental study of two and three phase flows in large diameter inclined pipes (2003) International Journal of Multiphase Flow, 29 (4), pp. 527-558. , DOI 10.1016/S0301-9322(03)00015-6Strazza, D., Demori, M., Ferrari, V., Poesio, P., Capacitance sensor for hold-up measurement in high-viscous-oil/ conductivewater core-annular flows (2011) Flow Measurement and Instrumentation, 22 (5), pp. 360-369. , OctMenotti, D., Najman, L., Facon, J., De Araujo, A.A., Multi-histogram equalization methods for contrast enhancement and brightness preserving (2007) IEEE Transactions on Consumer Electronics, 53 (3), pp. 1186-1194. , DOI 10.1109/TCE.2007.4341603Chan, T.F., Vese, L.A., Active contours without edges (2001) IEEE Transactions on Image Processing, 10 (2), pp. 266-277. , DOI 10.1109/83.902291Haralick, R.M., Sternberg, S.R., Zhuang, X., Image analysis using mathematical morphology (1987) IEEE Transactions on Pattern Analysis and Machine Intelligence, PAMI-9 (4), pp. 532-55
Zane Grey with Orange A.C. baseball team
No full textThis photograph shows Ohio native Zane Grey with the Orange A.C. Baseball Team, ca. 1896-1904. Prior to becoming a well-known author of western novels, Zane Grey was also a dentist and a semi-professional baseball player, with teams including the Orange Athletic Club and the Newark (New Jersey) Colts
Pressure Drop In Water-assisted Three-phase Flow Of Heavy Oil And Gas In A Vertical Pipe
No full textThis paper presents measurements of pressure drop for three-phase water-assisted flow of heavy crude oil, water and air at several flow rates inside a 2.84 cm i.d. vertical glass pipe, at pressure and temperature close to ambient. The superficial velocities used in the tests ranged from 0.02 to 1.2 m/s for oil, 0.04 to 0.5 m/s for water and 0.04 to 9.0 m/s for air. The oil was crude dead oil with a viscosity of 5,040 mPa.s and a density of 971 kg/m 3 at 25°C. A representative physical model is proposed to interpret the experimental data gathered. © BHR Group 2006 Multiphase Technology 5.2006421433Tissot, B.P., Weite, D.H., (1984) Petroleum Formation and Occurrence, Second Edition, , Springer-Verlag, New YorkBriggs, P.J., Baron, R.P., Fulleylove, R.J., Wright, M.S., (1988) Development of Heavy - Oil Reservoirs, pp. 206-214. , SPE 15748Wehunt, C.D., Burke, N.E., Noonan, S.G., Bard, T.R., (2003) Technical Challenges for Offshore Heavy Oil Field Developments, , paper OTC 15281Pinto, A.C.C., Offshore heavy oil in Campos basin: The Petrobras experience (2003) 2003 Offshore Technology Conference, , Houston, May 5-8, paper SPE 15283Vanegas-Prada, J.W.V., (1999) Experimental Study of Annular Oil-water Flow (Core Flow) in Elevation of Ultra Viscous Oils (in Portuguese), , MSc. thesis, Department of Petroleum Engineering, State University of Campinas, FEM-UNICAMP, Campinas-SP, BrazilOoms, G., Segal, A., Van Der Wees, A.J., Meerhoff, R., Oliemans, R.V.A., A theoretical model of core annular flow of very viscous oil core and a water annulus through a horizontal pipe (1984) Int. J. Mult. Flow, 10, pp. 41-60Bannwart, A.C., Rodriguez, O.H.M., Carvalho, C.H.M., Wang, I.S., Vara, R.M., Flow patterns in heavy crude oil-water flow (2004) J. En. Res. Tech. ASME, 126, pp. 184-189Bannwart, A.C., Rodriguez, O.M.H., Trevisan, F.E., Vieira, F.F., Carvalho, C.H.M., Flow patterns and pressure gradient in horizontal, upward inclined and vertical heavy oil-water and heavy oil-water-gas flows: Experimental investigation and full-scale experiments (2004) Proc. 3 rd International Symposium on Multiphase Flow Modeling and Experimentation, 4, pp. 2605-2613. , Pisa, Italy, September 22-25Bannwart, A.C., Vieira, F.F., Carvalho, C.H.M., Oliveira, A.P., Water-assisted flow of heavy oil and gas in a vertical pipe (2005) 2005 SPE International Thermal Operations and Heavy Oil Symposium, , Calgary, Alberta, Canada, November 1-3, paper SPE-97875-PPZuber, N., Findlay, J.A., Average volumetric concentration in two-phase flow systems (1965) J. Heat Transfer ASME - Series C, 87, pp. 453-46
Experimental research on spatial distribution of overtopping
No full textThe overtopping empirical formulas calculate the discharge only at the top of the crest of a coastal protection structure. On the other hand, the tolerable overtopping discharges are defined at certain points behind the crest where the total overtopping is reduced. The scope of this thesis is to find an empirical formula to describe the distribution of overtopping at the space behind the crest. This thesis comes as a further investigation on the work conducted by v.Kester [2009] for regular waves. In this research, a physical model was developed on which irregular waves are tested. Because of the duration of the tests and the amount of collected water (significant lose of water during the test), a completely new measuring system was designed. Five influencing parameters (variables) are considered on this research: wave height, wave period/steepness, slope angle, crest freeboard and crest permeability. The entire overtopping process is analysed separately for the total overtopping discharge, the overtopping discharge directly behind the crest and the distribution of overtopping behind the structure. In the analysis of the data collected from the measurements, the impact of the varying parameters is investigated leading to useful conclusions and better understanding of the entire process. Additionally, the experimental findings are analysed and compared to the relative existing methods. Based on the TAW [2002] method which is proposed by the EurOtop Manual [2007], a prediction formula is developed. This formula is a generic version of TAW [2002] formula in which a new reduction factor ?c is introduced in order to describe the decay of the overtopping and thus predict the discharge at any certain distance behind the crest. Other relevant methods are also analysed (Juul Jensen [1984], Steenaard [2002], Besley [1999] and v.Kester [2009]) and conclusions for their applicability are drawn leading to suggested improvements or corrections. Apart from the distribution of overtopping, on this thesis the determination of crest freeboard (which is an ambiguous issue) is also investigated. Finally, suggestions of further research on this topic are discussed. The entire work has been perfomed in close cooperation with van Oord.Hydraulic EngineeringCivil Engineering and Geoscience
Flow over partially liquid filled cavity
No full textExperiments have been carried out to investigate the effect of liquid cavity filling on the behavior of the gas flow over a flat plate cavity. PIV measurements in the gas phase reveal that cavity filling can affect vortex shedding in the cavity mouth. Shear layer vortices can break-up into smaller vortices, thereby losing their periodic interaction with the aft wall and, hence, their sound producing potential. Expected is that this is one of the mechanisms causing sound mitigation in corrugated pipes with liquid addition, observed in literature
- …
