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Sample records for lesiones del iris

  1. Uso de la triamcinolona subtenoniana en pacientes con rubeosis del iris Use of intravitreal triamcinolone in patients with iris rubeosis

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    Irene Rojas Rondón

    2008-12-01

    Full Text Available OBJETIVO: Describir el comportamiento de la rubeosis del iris luego de la aplicación de triamcinolona subtenoniana. MÉTODOS: Se realizó un estudio descriptivo de corte longitudinal con 25 pacientes para un total de 32 ojos con diferentes afecciones oculares. Se efectuaron pruebas estadísticas con las variables del estudio y en algunas se utilizó la prueba de los signos de comparación para datos pareados y en otras se aplicó chi cuadrado. Se caracterizaron las variables: edad, sexo, causa de rubeosis del iris y sus estadios, síntomas y tratamiento con láser de panfotocoagulación retiniana. RESULTADOS: La retinopatía diabética proliferativa fue la afección más frecuente en el 76 % de los pacientes, seguida de la oclusión de la vena central retiniana. Del total de pacientes tratados, el 37,5 % evolucionó satisfactoriamente el estado de la rubeosis del iris. Fue mayor el número de pacientes que mejoraron el grado de la rubeosis con tratamiento combinado de láser y triamcinolona subtenoniana, aunque estadísticamente no fue significativo. El estado de la rubeosis mejoró en más de la mitad de los pacientes con tiempo de evolución menor de 6 meses. En aquellos con un tiempo mayor de 6 meses y neovascularización del iris grado III, se pudo estabilizar el glaucoma neovascular. CONCLUSIÓN: Se plantea que la triamcinolona subtenoniana constituye una alternativa para el manejo de este tipo de pacientes.OBJECTIVE: To describe the behaviour of iris rubeosis after using intravitreal triamcinolone. METHODS: A longitudinal descriptive study was performed on 25 patients for a total number of 32 eyes with several ocular diseases. Statistical tests were made with the study variables; sign comparison for paired data and Chi square tests were applied. The variables were age, sex, cause of iris rubeosis and its staging, symptoms and treatment with retinal photocoagulation laser. RESULTS: Proliferative diabetic retinopathy was the most common

  2. BRCA1-IRIS overexpression promotes and maintains the tumor initiating phenotype: implications for triple negative breast cancer early lesions.

    Science.gov (United States)

    Sinha, Abhilasha; Paul, Bibbin T; Sullivan, Lisa M; Sims, Hillary; El Bastawisy, Ahmed; Yousef, Hend F; Zekri, Abdel-Rahman N; Bahnassy, Abeer A; ElShamy, Wael M

    2017-02-07

    Tumor-initiating cells (TICs) are cancer cells endowed with self-renewal, multi-lineage differentiation, increased chemo-resistance, and in breast cancers the CD44+/CD24-/ALDH1+ phenotype. Triple negative breast cancers show lack of BRCA1 expression in addition to enhanced basal, epithelial-to-mesenchymal transition (EMT), and TIC phenotypes. BRCA1-IRIS (hereafter IRIS) is an oncogene produced by the alternative usage of the BRCA1 locus. IRIS is involved in induction of replication, transcription of selected oncogenes, and promoting breast cancer cells aggressiveness. Here, we demonstrate that IRIS overexpression (IRISOE) promotes TNBCs through suppressing BRCA1 expression, enhancing basal-biomarkers, EMT-inducers, and stemness-enforcers expression. IRISOE also activates the TIC phenotype in TNBC cells through elevating CD44 and ALDH1 expression/activity and preventing CD24 surface presentation by activating the internalization pathway EGFR→c-Src→cortactin. We show that the intrinsic sensitivity to an anti-CD24 cross-linking antibody-induced cell death in membranous CD24 expressing/luminal A cells could be acquired in cytoplasmic CD24 expressing IRISOE TNBC/TIC cells through IRIS silencing or inactivation. We show that fewer IRISOE TNBC/TICs cells form large tumors composed of TICs, resembling TNBCs early lesions in patients that contain metastatic precursors capable of disseminating and metastasizing at an early stage of the disease. IRIS-inhibitory peptide killed these IRISOE TNBC/TICs, in vivo and prevented their dissemination and metastasis. We propose IRIS inactivation could be pursued to prevent dissemination and metastasis from early TNBC tumor lesions in patients.

  3. Fenilefrina intracamerular en el síndrome del iris flácido intraoperatorio

    OpenAIRE

    Ruiz Vargas, Arturo

    2011-01-01

    La incidència d'hipertròfia benigna de pròstata és aproximadament d'un 50 % en pacients majors de 50 anys. La Tamsulosina és el medicament més prescrit per aquesta dolència i la principal causa del síndrome d'iris flàccid intraoperatori a la cirurgia de cataractes. Els nostres dos estudis han sigut; per una banda, avaluar la toxicitat corneal i afectació cardíaca de Fenilefrina intracamerular a una concentració de 2,5% respecte la pauta de dilatació tòpica estàndard al nostre centre, i per l'...

  4. ASPECTOS Y CONSIDERACIONES IMPORTANTES EN EL CÁLCULO DEL ÍNDICE DE REGULARIDAD INTERNACIONAL (IRI)

    OpenAIRE

    Badilla Vargas, Gustavo

    2011-01-01

    El Índice de Regularidad Internacional (IRI) ha sido un parámetro ampliamente utilizado para determinar lascaracterísticas superficiales que presentan los pavimentos. Recientemente en Costa Rica, la Administración ha venidointroduciendo la medición del IRI como parámetro de aceptación de diferentes obras viales. Sin embargo, no ha sidoposible lograr una adecuada implementación de este índice. El artículo presenta los principales detalles, cuidados yprocedimientos involucrados en el cálculo de...

  5. Reacciones encadenadas: del reloj de yodo al arco iris químico

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    Carlos Durán Torres,

    2011-01-01

    Full Text Available Para motivar a los alumnos en el estudio de la química, presentamos una experiencia que llamará su atención y que puede servir para introducir diversos conceptos en el aula. Consiste en encadenar la reacción de reducción del yodato potásico por hidrogenosulfito de sodio en presencia de almidón con otra reacción en la que aparecendisoluciones de indicadores de pH coloreadas al pasar de medio ácido a básico. En siete copas de vidrio que contienen un líquido incoloro, se añade otra disolución también incolora. El contenido de las copas va cambiando brusca y sucesivamente a azul-negro. Al añadir a las copas una tercera disolución, igualmente incolora, desaparece el color oscuro y aparecen los siete colores del arco iris produciendo un vistoso resultado.

  6. Reacciones encadenadas: del reloj de yodo al arco iris químico

    Directory of Open Access Journals (Sweden)

    Carlos Durán Torres

    2011-01-01

    Full Text Available Para motivar a los alumnos en el estudio de la química, presentamos una experiencia que llamará su atención y que puede servir para introducir diversos conceptos en el aula. Consiste en encadenar la reacción de reducción del yodato potásico por hidrogenosulfito de sodio en presencia de almidón con otra reacción en la que aparecen disoluciones de indicadores de pH coloreadas al pasar de medio ácido a básico. En siete copas de vidrio que contienen un líquido incoloro, se añade otra disolución también incolora. El contenido de las copas va cambiando brusca y sucesivamente a azul-negro. Al añadir a las copas una tercera disolución, igualmente incolora, desaparece el color oscuro y aparecen los siete colores del arco iris produciendo un vistoso resultado.

  7. Determinación de la regularidad superficial del pavimento, mediante el cálculo del Índice de Regularidad Internacional (IRI)

    OpenAIRE

    Badilla Vargas, Gustavo

    2012-01-01

    El Índice de Regularidad Internacional (IRI) ha sido un parámetro ampliamente utilizado para determinar las características superficiales que presentan los pavimentos. Recientemente, en Costa Rica, la Administración ha venido introduciendo la medición del IRI como parámetro de aceptación de diferentes obras viales; sin embargo, no ha sido posible lograr una adecuada implementación de este índice. El artículo presenta los principales detalles, cuidados y procedimientos involucrados en el cálcu...

  8. Hombro doloroso y lesiones del manguito rotador

    OpenAIRE

    Karla Mora-Vargas

    2008-01-01

    Se presenta el caso de una mujer de 52 años conocida sana, sin antecedentes positivos, quien inicia con dolor y disfunción del miembro superior izquierdo, la cual fue tratada con antiinflamatorios no esteroideos inicialmente, sin embargo, al persistir los síntomas y apoyado con estudios radiológicos recibe tratamiento inyectado a nivel del hombro. Cuadro que evoluciona posteriormente a ruptura del manguito rotador, con su subsiguiente reparación quirúrgica y fisioterapia, logrando la recupera...

  9. Hombro doloroso y lesiones del manguito rotador

    Directory of Open Access Journals (Sweden)

    Karla Mora-Vargas

    2008-12-01

    Full Text Available Se presenta el caso de una mujer de 52 años conocida sana, sin antecedentes positivos, quien inicia con dolor y disfunción del miembro superior izquierdo, la cual fue tratada con antiinflamatorios no esteroideos inicialmente, sin embargo, al persistir los síntomas y apoyado con estudios radiológicos recibe tratamiento inyectado a nivel del hombro. Cuadro que evoluciona posteriormente a ruptura del manguito rotador, con su subsiguiente reparación quirúrgica y fisioterapia, logrando la recuperación casi total de su funcionabilidad. El síndrome de hombro doloroso es cada vez más frecuente en la población asociado con el aumento en la expectancia de vida, la actividad física y los factores intrínsecos de la anatomía del cuerpo, por lo cual se hace importante su consideración diaria.

  10. Los colores del viento y la voz del arco iris: representación del clima entre los totonacas

    OpenAIRE

    Lammel, Annamária

    2013-01-01

    El viento que viene del este es el viento del infierno, como cuentan todos los indios totonacas que habitan estos lugares. Porque el viento, el aire, trae las enfermedades del otro mundo.Cuando el viento, el aire fresco llega, se dice que viene del norte. Y se dice que es “el norte” el que ha llegado, porque este viento que viene del planeta de los muertos, trae el fuego, el ventarrón y el ciclón. Llega del norte, lugar de los muertos. Los totonacas dicen que los malos vientos son blancos (sn...

  11. [Epidemiology of dog bite lesions in Tierra del Fuego, Argentina].

    Science.gov (United States)

    Zanini, Fabián; Padinger, Patricia; Elissondo, María C; Pérez, Héctor

    2008-01-01

    The coexistence between man and dog has resulted in mutual benefits during thousands of years, nevertheless some problems have recently arisen where bite injuries have an important role. The aim of this work was to describe the epidemiological characteristics of dog bite lesions which occurred during a year in Tierra del Fuego. A descriptive observational, transversal study of patients who were admitted with dog bite injuries to clinic and pediatric emergency services of hospitals and health centers was carried out between 3/1/05 and 3/1/06. A total of 382 records were made. The children group represents 49.5%. The group between 5 and 9 year-old was the most affected (44.4%; IC95% 37.2-51.8). In the adult group, that between 15 and 24 year-old was the most affected (29.5%; IC95% 23.2-36.5). More lesions were registered in men (57.6%) than in women (42.4%) (chi2 = 8.6, p = 0.003). During spring and summer months, 56.5% of the lesions were registered. A 72.8% of the incidents occurred on the public highway. Dogs of big size were responsible of 49.7% (IC95% 44.6-54.9) of the injuries. The 89.8% of the incidents were caused by another person's dog. Of the lesions, 55.8% (IC95% 50.6-60.8) were registered in lower extremities and 11% (IC95% 8.1-14.7) in head and neck. These data show that dog bite lesions affect the health and impact in the quality of life of the population of Tierra del Fuego, Argentina.

  12. Actualización del síndrome de hombro doloroso: lesiones del manguito rotador

    OpenAIRE

    Carlos Eduardo Ugalde Ovares; Daniel Zúñiga Monge; Ricardo Barrantes Monge

    2013-01-01

    El hombro es una articulación muy móvil, lo cual predispone a múltiples patologías, entre ellas las lesiones del manguito rotador, siendo ésta una causa frecuente de dolor y limitación funcional. Para su valoración se realiza una anamnesis, un examen físico del hombro, múltiples maniobras con diferentes niveles de especificidad y sensibilidad, estudios de imagen como rayos X, ecografía, y resonancia magnética. El conocimiento y tratamiento de las rupturas del manguito rotador está mejorando p...

  13. Epidemiología de las lesiones por mordedura de perro en Tierra del Fuego, Argentina Epidemiology of dog bite lesions in Tierra del Fuego, Argentina

    OpenAIRE

    Fabián Zanini; Patricia Padinger; María C. Elissondo; Héctor Pérez

    2008-01-01

    La convivencia del hombre y el perro ha resultado en beneficios mutuos durante miles de años, si bien en el último tiempo han surgido una serie de inconvenientes donde las lesiones por mordeduras ocupan un lugar destacado. El objetivo del presente trabajo fue describir las características epidemiológicas de las lesiones por mordedura de perro ocurridas a lo largo de un año en Tierra del Fuego. Se realizó un estudio observacional descriptivo, transversal, de los pacientes que ingresaron con le...

  14. Epidemiología de las lesiones por mordedura de perro en Tierra del Fuego, Argentina Epidemiology of dog bite lesions in Tierra del Fuego, Argentina

    OpenAIRE

    Fabián Zanini; Patricia Padinger; María C. Elissondo; Héctor Pérez

    2008-01-01

    La convivencia del hombre y el perro ha resultado en beneficios mutuos durante miles de años, si bien en el último tiempo han surgido una serie de inconvenientes donde las lesiones por mordeduras ocupan un lugar destacado. El objetivo del presente trabajo fue describir las características epidemiológicas de las lesiones por mordedura de perro ocurridas a lo largo de un año en Tierra del Fuego. Se realizó un estudio observacional descriptivo, transversal, de los pacientes que ingresaron con le...

  15. Estimación del índice de rentabilidad inmobiliaria Sectorial – Iris para vivienda urbana en el municipio de Medellín

    OpenAIRE

    Alzate Yepes, David

    2014-01-01

    Introducción: El presente trabajo está dirigido a la estimación de un indicador1: el Índice de Rentabilidad Inmobiliaria Sectorial – IRIS, que permita cuantificar el resultado económico de la inversión en vivienda. La rentabilidad, entendida como la relación entre el beneficio económico obtenido respecto del capital invertido es el objetivo central de cualquier inversión, y ha sido tema de múltiples análisis apoyados en el área económica, con el empleo de herramientas estadísticas y de...

  16. Lesiones por sobrecarga del tibial posterior. Valoración funcional diferencial

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    Martín Urrialde, José Antonio

    2001-01-01

    El tibial posterior se halla sometido a diversas lesiones por sobrecarga durante la práctica deportiva: desde el cuerpo del tendón hasta la corredera del mismo pueden ser lugares de asiento de la lesión. Las alteraciones estáticas del pie, se revelan como una de las causas más comunes, siendo parte esencial del tratamiento. Terapia y Rehabilitación

  17. Factores asociados a lesiones cervicales o presencia del virus del papiloma humano en dos poblaciones de estudiantes de Lima

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    María Valderrama C

    2007-07-01

    Full Text Available Objetivos: Determinar la prevalencia y factores asociados a lesiones cervicales o presencia del virus del papiloma humano (VPH en mujeres estudiantes en educación superior de 18 a 26 años de Lima. Materiales y métodos: Se realizó un estudio de corte transversal, en dos universidades y un instituto superior tecnológico de Lima, durante los meses de agosto a diciembre del 2001. Se aplicó un cuestionario y se colectaron muestras para Papanicolaou (PAP y detección del ADN de los VPH 6, 11, 16, 18 por el método de PCR (reacción en cadena de la polimerasa. Se incluyeron en el análisis 321 estudiantes que reportaron actividad sexual a quienes se tomó muestras para PAP y VPH. Resultados: La prevalencia de VPH (6, 11, 16, 18 fue de 8,4%, y para las lesiones cervicales fue 2,5% (diagnóstico a través del PAP. Las lesiones cervicales o presencia del VPH fueron más frecuentes en el grupo de 21 a 23 años (p= 0,024. La diferencia de edades (tres a más años entre la pareja sexual de mayor edad y la participante se asoció significantemente con lesiones cervicales o presencia del VPH (OR:8,8; IC95:1,9-39,6. La edad de la primera relación sexual, número de parejas sexuales y uso de condón, no mostraron significancia estadística. Conclusiones: Las lesiones cervicales o presencia del VPH son frecuentes en esta población de mujeres jóvenes. La edad y la diferencia de edades con la pareja sexual de mayor edad se asociaron a las lesiones cervicales o presencia del VPH.

  18. Lesiones del ligamento cruzado anterior. Nuevas opciones de tratamiento mediante ingenier??a de tejidos

    OpenAIRE

    Bol??var Arroyo, V??ctor; Raya Villarraso, Ana; Garrido-G??mez, Juan

    2014-01-01

    Las lesiones del ligamento cruzado anterior (LCA) constituyen una causa frecuente de lesiones en poblaci??n joven. Al tratarse de una estructura intraarticular, el ligamento cruzado lesionado no cicatriza de forma similar al de otros ligamentos extraarticulares, de forma que entre los cabos de ruptura no se interpone el co??gulo de fibrina que aparece en las fases iniciales de la cicatrizaci??n. La ruptura del LCA conlleva la aparici??n de inestabilidad de rodilla, da??o meniscal ...

  19. Actualización del síndrome de hombro doloroso: lesiones del manguito rotador

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    Carlos Eduardo Ugalde Ovares

    2013-03-01

    Full Text Available El hombro es una articulación muy móvil, lo cual predispone a múltiples patologías, entre ellas las lesiones del manguito rotador, siendo ésta una causa frecuente de dolor y limitación funcional. Para su valoración se realiza una anamnesis, un examen físico del hombro, múltiples maniobras con diferentes niveles de especificidad y sensibilidad, estudios de imagen como rayos X, ecografía, y resonancia magnética. El conocimiento y tratamiento de las rupturas del manguito rotador está mejorando progresivamente, con la evolución de técnicas de reparación artroscópicas.The shoulder is a very mobile joint, which predisposes to multiple pathologies including rotator cuff injuries. It is a common cause of pain and functional limitation. To explore the shoulder we use the anamnesis, physical examination, multiple maneuvers with different levels of specificity and sensitivity, and imaging studies such as X-rays, ultrasound, and MRI. The knowledge and treatment of rotator cuff ruptures is improving gradually, with the development of arthroscopic repair techniques.

  20. Factores asociados a lesiones cervicales o presencia del virus del papiloma humano en dos poblaciones de estudiantes de Lima

    OpenAIRE

    María Valderrama C; Francisco E. Campos; Cárcamo, César P; García,

    2007-01-01

    Objetivos: Determinar la prevalencia y factores asociados a lesiones cervicales o presencia del virus del papiloma humano (VPH) en mujeres estudiantes en educación superior de 18 a 26 años de Lima. Materiales y métodos: Se realizó un estudio de corte transversal, en dos universidades y un instituto superior tecnológico de Lima, durante los meses de agosto a diciembre del 2001. Se aplicó un cuestionario y se colectaron muestras para Papanicolaou (PAP) y detección del ADN de los VPH 6, 11, 16, ...

  1. Epidemiología de las lesiones por mordedura de perro en Tierra del Fuego, Argentina Epidemiology of dog bite lesions in Tierra del Fuego, Argentina

    Directory of Open Access Journals (Sweden)

    Fabián Zanini

    2008-02-01

    Full Text Available La convivencia del hombre y el perro ha resultado en beneficios mutuos durante miles de años, si bien en el último tiempo han surgido una serie de inconvenientes donde las lesiones por mordeduras ocupan un lugar destacado. El objetivo del presente trabajo fue describir las características epidemiológicas de las lesiones por mordedura de perro ocurridas a lo largo de un año en Tierra del Fuego. Se realizó un estudio observacional descriptivo, transversal, de los pacientes que ingresaron con lesiones por mordedura de perro al Servicio de Guardia Clínica y Pediátrica de los Hospitales y Centros de Salud desde el 1/3/05 hasta el 1/3/06. Se confeccionaron 382 planillas. El 49.5% fueron niños resultando más afectado el grupo de 5-9 años (44.4%; IC95% 37.2-51.8. En adultos correspondió al grupo de 15-24 años (29.5%; IC95% 23.2-36.5. Se registraron más lesiones en varones (57.6% que en mujeres (42.4% (x² = 8.6, p= 0.003. En los meses primavera y verano se registró el 56.5% de las lesiones, en la vía pública el 72.8% de ellas. Los perros de tamaño grande causaron el 49.7% (IC95% 44.6-54.9 de las lesiones. El 89.8% de los ataques fueron causados por perros ajenos. El 55.8% (IC95% 50.6-60.8 se registró en miembros inferiores y el 11% (IC95% 8.1-14.7 en cabeza y cuello. Los datos obtenidos demuestran que en Tierra del Fuego las lesiones por mordedura de perro afectan en forma permanente la salud e impactan en la calidad de vida de la población.The coexistence between man and dog has resulted in mutual benefits during thousands of years, nevertheless some problems have recently arisen where bite injuries have an important role. The aim of this work was to describe the epidemiological characteristics of dog bite lesions which occurred during a year in Tierra del Fuego. A descriptive observational, transversal study of patients who were admitted with dog bite injuries to clinic and pediatric emergency services of hospitals and health

  2. Lesiones de los sargentos alumnos del Ejército de Tierra y factores de riesgo lesional

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    F.A. Valero Capilla

    Full Text Available Antecedentes: los cursos de entrenamiento militar requieren un alto nivel de exigencia física y provocan un número importante de lesiones osteomusculares. Es de interés conocer el tipo de lesiones que se observan en estos cursos y los factores de riesgo lesional asociados, para poder implantar posteriormente medidas preventivas adecuadas y correctas gestiones de los recursos que se disponen. Objetivo: presentar el tipo de lesiones observadas durante la fase común del primer curso de formación de los sargentos alumnos del Ejército de Tierra (ET y analizar la frecuencia lesional y factores de riesgo relacionados. Material y Métodos: estudio descriptivo observacional de corte transversal de 15 semanas de duración, en el que se incluyeron 579 sargentos alumnos (49 mujeres, edad media de 25,9 años (Rango 18-31. Al inicio del curso, se obtuvieron los parámetros antropométricos de los alumnos y se midió su condición física mediante las marcas obtenidas en carrera de 6000, 1000 y 50 m, y pruebas de salto vertical y flexo extensiones en suelo. Durante el curso, se registraron las lesiones observadas, sus causas, localización y tiempo de recuperación. Al final del curso, se comparó la frecuencia lesional observada y sus causas entre hombres y mujeres, y en el grupo de hombres, se compararon las marcas obtenidas y los parámetros antropométricos entre los lesionados y no lesionados. Resultados: la edad media del grupo de mujeres vs hombres fue de 27,1 (3,18 vs 25,7 (3,03 años p<0,01; la talla 1,63 (0,05 vs 1,77 (0,07 m, p<0,0001; y el peso 57,2 (5,04 vs 75,2 (9,14 kg, p<0,0001, respectivamente. Las marcas obtenidas por el grupo de mujeres fueron significativamente menores en todas las pruebas (p<0,0001. Se lesionaron 111 alumnos (19,1%, observándose un total de 113 lesiones. Las lesiones mas frecuentes fueron los esguinces y tendinitis que supusieron el 61% de las lesiones, y la localización más frecuente fue en extremidades

  3. Estudio epidemiológico y anatómico del Síndrome de iris flácido intraoperatorio en pacientes con tratamiento con bloqueantes alfa 1 adrenérgicos

    OpenAIRE

    2013-01-01

    El Síndrome de iris flácido intraoperatorio (IFIS), descrito por Chang y Campbell en 2005, acontece durante la microcirugía de cataratas mediante facoemulsificación ultrasónica en pacientes que están en tratamiento con bloqueantes alfa-1 adrenérgicos (bloq-alfa1A). Está compuesto por una triada clínica: iris flácido atónico que se ondula en respuesta a la irrigación intraocular propia de la fluídica perioperatoria, tendencia iridiana a prolapsarse hacia la punta del facoemulsificador y las in...

  4. La importancia del calzado en las principales lesiones de rodilla en corredores

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    Izquierdo Peña, Javier

    2016-01-01

    El enfoque contemporáneo orientado al mantenimiento y a la mejoría de la salud ha puesto de moda el running en nuestro país pero la práctica de este deporte no está exenta del riesgo de padecer lesiones. En la sociedad actual está muy extendida la idea de que la equipación con zapatillas con la última tecnología puede proteger y ayudar a mejorar frente a las lesiones, no solo de rodilla sino también de otras partes del cuerpo. Los diversos estudios científicos analizados pretenden estab...

  5. Iris pigment epithelial cysts in a newborn

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    Zargar, Shabnam

    2016-04-01

    Full Text Available Purpose: We report a case of iris pigment epithelial cysts in a newborn and discuss the importance of an accurate diagnosis for prevention of amblyopia.Methods: We describe a case of an abnormal red reflex seen on a newborn exam.Results: A full-term female born via normal spontaneous vaginal delivery without any complications was seen in the newborn nursery. She was noted to have an abnormal eye exam. Pupils were large with circular dark excrescences of the iris pigment epithelium. She was referred to a pediatric ophthalmologist where she was noted to fixate and follow faces. No afferent pupillary defect was seen. OD red reflex was normal whereas OS red reflex was blocked mostly by dark excrescences. A 2– dark brown lesion was seen in the OD iris and a 3–5 mm dark brown lesion was seen in the OS iris, consistent with a pupillary iris pigment epithelial cyst. Central visual axis was clear OU. Glaucoma was not present and patching was not performed. Observations and clinical photographs were recommended with follow-up in three months.Conclusion: Iris pigment epithelial cysts are uncommonly seen in children. The primary care provider first seeing a newborn must be aware of lesions obscuring a red reflex with appropriate follow-up. Follow-up in three months with IOP measurements is recommended. Iris pigment epithelial cysts in children may be a cause of amblyopia, thus prompt evaluation is important for prognostic purposes and the prevention of amblyopia.

  6. LESIONES OSTEOMUSCULARES EN TRABAJADORES DE UN HOSPITAL MEXICANO Y LA OCURRENCIA DEL AUSENTISMO

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    Montoya Díaz,Ma. del Carmen; Palucci Marziale, Maria Helena; do Carmo Cruz Robazzi, Maria Lucia; Taubert de Freitas,Fabiana Cristina

    2010-01-01

    Objetivo: Analizar la ocurrencia de lesiones osteomusculares y de ausentismo-enfermedad entre trabajadores de un hospital mexicano y las condiciones ergonómicas del ambiente. Material y método: Estudio descriptivo, cuantitativo, en hospital de Morelia, México, con las licencias médicas 2005-2006 y con 226 trabajadores de diferentes categorías profesionales. Procedimientos: Identificación del ausentismo-enfermedad, validación de la versión en español del Cuestionario Nórdico de Síntomas Osteom...

  7. LESIONES POR HERRAMIENTAS DE TRABAJO EN POLICIAS, ATENDIDOS EN TRAUMATOLOGÍA DEL HOSPITAL J.P.M. POLICIA NACIONAL DEL PERU. AREQUIPA. 2013

    OpenAIRE

    SALAZAR RIVAS, STEFANIE URSULA

    2015-01-01

    LESIONES LESIONES SE PUEDEN CLASIFICAR TIPO DE LESION HERIDAS CONTUSIONES ESGUINCE LUXACIONES FRACTURA DESGARRO MUSCULAR RUPTURA DE TENDON ATRICCIONES AMPUTACIONES CAUSAS DE ACCIDENTES DE TRABAJO LOCALIZACIÓN ANATÓMICA SECUELAS LA POLICIA NACIONAL DEL PERU EXPLOSIVOS INDUMENTARIA HERRAMIENTAS DE TRANSPORTE ANIMALES TIPO DE TRABAJO POLICIAL

  8. LESIONES POR HERRAMIENTAS DE TRABAJO EN POLICIAS, ATENDIDOS EN TRAUMATOLOGÍA DEL HOSPITAL J.P.M. POLICIA NACIONAL DEL PERU. AREQUIPA. 2013

    OpenAIRE

    SALAZAR RIVAS, STEFANIE URSULA

    2015-01-01

    LESIONES LESIONES SE PUEDEN CLASIFICAR TIPO DE LESION HERIDAS CONTUSIONES ESGUINCE LUXACIONES FRACTURA DESGARRO MUSCULAR RUPTURA DE TENDON ATRICCIONES AMPUTACIONES CAUSAS DE ACCIDENTES DE TRABAJO LOCALIZACIÓN ANATÓMICA SECUELAS LA POLICIA NACIONAL DEL PERU EXPLOSIVOS INDUMENTARIA HERRAMIENTAS DE TRANSPORTE ANIMALES TIPO DE TRABAJO POLICIAL

  9. Lesiones musculares en el mundo del deporte. [Muscular injuries in the world of the sport

    OpenAIRE

    María Ángeles Cardero Durán

    2009-01-01

    Resumen En el mundo del deporte y no solo en este, sino en toda la práctica de una actividad física, son muy frecuentes las lesiones musculares. Hay muchos tipos de lesiones musculares de los que hablaremos más adelante, como pueden ser desgarros musculares, calambres, contracturas etc., que tienen mayor incidencia en la musculatura poli-articular, por condiciones de acumulación de fatiga, trabajo no realizado correctamente, o condiciones ambientales desfavorables. Es importante el dia...

  10. Glycophosphopeptical como adyuvante en el tratamiento de lesiones del pie diabético: estudio piloto

    OpenAIRE

    Héctor Ruiz-Mercado; Miguel Huerta-Viera; Rafael Bustos-Saldaña; Ernesto Sahagún-Flores; Georgina Hernández-Flores; Alejandro Bravo-Cuellar

    2012-01-01

    Introducción: la complejidad del pie diabético, la alta frecuencia de amputaciones y la inmunodepresión que lo acompaña dificultan su tratamiento. Objetivo: probar la utilidad del inmunoregulador glyphosphopetical como terapia adyuvante en pie diabético. Material y métodos: ensayo clínico controlado, doble ciego, con 19 pacientes por grupo con lesiones III y IV (clasificación Wagner). El grupo de estudio fue tratado oralmente con glycophosphopeptical 1 g/cada 8 horas por 4 semanas y el grupo ...

  11. SLAP lesion of the shoulder. MRI evaluation; La lesione antero-posteriore del labbro glenoideo superiore della spalla. Valutazione con Risonanza Magnetica

    Energy Technology Data Exchange (ETDEWEB)

    Barile, A.; Sabatini, M.; Maffey, M.V.; Di Cesare, E.; Masciocchi, C. [L' Aquila Univ., L' Aquila (Italy). Cattedra di Radiologia

    2000-09-01

    Purpose of this work is to assess MR potentials in the evaluation of superior glenoid labrum disease and possible associated conditions of the rotator cuff and of the anterior mechanism of the shoulder. 51 patients ( age range 18 to 53 years) with a diagnosis of anteroposterior lesion of the superior glenoid labrum were retrospectively evaluated. MR examinations were performed with a 0.2 T permanent magnet and a dedicated coil, using T1- and T2-weighted SE sequences on mostly coronal-oblique planes. Slice thickness was 4 mm. In 8 cases, the examination was completed with intra-articular injection of contrast agent. Twenty-eight patients were submitted to surgery (arthrotomy in 7 cases; arthroscopy in 21 cases). MRI demonstrated 5 cases of superior labrum irregularities at the level of its glenoid insertional portion (type I lesion); 6 cases of detachment of the superior portion of the labrum (type II); 9 cases of bucket handle tear of the superior labrum with involvement of the insertional portion of the long head of the biceps tendon (type III); 8 cases of superior labrum tear extending within the long head of the biceps tendon (type IV). Subsequent surgery always confirmed the presence of associated lesions, while the superior labrum lesion was not confirmed in 3 patients. In 4 cases, surgical findings provided a different classification of the lesion type than MRI. MRI can be a valuable diagnostic technique in type III and IV lesions of the superior glenoid labrum. It often provides important information about the possible presence of associated diseases, especially of the rotator cuff, which are helpful for treatment planning. [Italian] Scopo di questo lavoro e' analizzare le potenzialita' della RM nella valutazione della patologia del cercine glenoideo superiore e delle eventuali lesioni associate della cuffia dei rotatori e della cinghia funzionale anteriore. 51 pazienti (con eta' compresa tra 18 e 53 anni), nei quali era stata posta diagnosi

  12. Sutura primaria en las lesiones traumáticas del colon Primary suture applied in the colonic traumatic lesions

    Directory of Open Access Journals (Sweden)

    Maribel Vicente Medina

    2009-06-01

    Full Text Available INTRODUCCIÓN. Las suturas digestivas siempre han sido una preocupación para los cirujanos por la gravedad de las complicaciones que pueden presentarse. Fue objetivo de esta presentación demostrar la factibilidad de la sutura primaria en el colon. MÉTODOS. Presentamos los resultados de un período de 14 meses en los cuales se realizaron 32 suturas primarias en el colon a causa de lesiones traumáticas. Los pacientes fueron atendidos en dos hospitales, uno provincial y otro nacional en la República de Yemen. Se tomaron como datos fundamentales el tipo de trauma, la parte afectada del colon, las lesiones asociadas, el tipo de operación en el colon, las demás operaciones asociadas o complementarias, así como el uso de antibióticos. RESULTADOS. Se estudiaron 32 pacientes con lesiones traumáticas de colon, 29 de ellos (90,62 % por arma de fuego. Otras causas fueron las heridas por arma blanca y los accidentes de tránsito. Un porcentaje elevado de los casos necesitó la intervención en órganos abdominales o la resección de estos. El índice de complicaciones fue bajo (6 pacientes con una sola dehiscencia y 2 fístulas. No hubo que lamentar fallecidos. CONCLUSIONES. Es factible obtener buenos resultados con este procedimiento, que a la vez evita la tan objetada y molesta para los pacientes colostomía, con mínimo riesgo para ellos.INTRODUCTION: Digestive sutures always have been a concern for surgeons due to severity of possible complications. Aim of present presentation was to show feasibility of colon primary suture. METHODS: Results achieved during 14 months are presented, in which we performed 12 primary sutures in colon due to traumatic lesions. Patients were seen in two hospitals, one al provincial level and the other at national level in Yemen Republic. We took as essential data the type of trauma, the involved portion of colon, associated lesions, type of surgery in colon, the other associated or complementary surgeries, as well

  13. Caracterización de las lesiones derivadas del entrenamiento físico militar

    Directory of Open Access Journals (Sweden)

    Juan Sebastián Rodríguez Gómez

    2016-01-01

    Full Text Available Introducción: En busca del mejoramiento físico se han desarrollado diferentes formas y maneras de trabajar el cuerpo y así generar el óptimo desarrollo de este en las actividades diarias; es el caso del entrenamiento físico militar, el cual conlleva a unas altas exigencias físicas en los cadetes por el tiempo de concentración, las horas de entrenamiento y la densidad de las actividades las cuales se dan de manera diaria por lo que esta práctica se encuentra asociada inevitablemente con la aparición de lesiones. Objetivo: Caracterizar las lesiones derivadas del entrenamiento físico militar en cadetes de tercero, cuarto y quinto nivel de la Escuela Militar de Cadetes General José María Córdova. Materiales y Métodos: Se planteó un estudio descriptivo de corte transversal, con una muestra tomada aleatoriamente para los hombres  y se tomó a todas las mujeres por ser una cantidad menor en cada uno de los niveles. El instrumento aplicado se validó a través de test-retest y juicio de expertos. Resultados y Discusión: Se encontró que la principal lesión dentro de estos niveles es la periostitis, seguida de lesiones como fisuras, tendinitis y esguinces por sobrecargas que se presentan en el entrenamiento, mala técnica e inadecuada rehabilitación. Conclusiones: La carga física a la que están sometidos constantemente los cadetes es elevada por lo que es una población que se encuentra siempre expuesta a sufrir lesiones importantes en sus extremidades inferiores debido a factores como la indumentaria militar, carga del entrenamiento, práctica deportiva, terreno y falta de descanso como lo expresan los cadetes. Cómo citar este artículo: Rodríguez JS, Valenzuela JA, Velasco JD, Castro LE, Melo PJ. Caracterización de las lesiones derivadas del entrenamiento físico militar. Rev Cuid. 2016; 7(1: 1219-26. http://dx.doi.org/10.15649/cuidarte.v7i1.301

  14. Lesiones vasculares abdominales: El desafío del cirujano de trauma

    Directory of Open Access Journals (Sweden)

    Juan A Asensio

    2001-06-01

    Full Text Available Introducción: Las lesiones vasculares abdominales presentan los mayores índices de mortalidad y morbilidad de entre todas las lesiones que puede sufrir un enfermo traumático. Método: Revisión de la clínica, diagnóstico, vías de abordaje y tratamiento de los pacientes con lesiones vasculares intraabdominales, basada en la experiencia en el manejo de 302 enfermos. Resultados: Las heridas penetrantes abdominales constituyen entre el 90%-95% de las lesiones que afectan a los vasos abdominales. La lesión abdominal multiorgánica es frecuente. Los hallazgos clínicos compatibles con hemoperitoneo o peritonitis y la ausencia de pulsos femorales son tributarios de laparotomía. En los pacientes que presentan paro cardio-respiratorio, se debe realizar toracotomía de urgencia para masaje cardiaco abierto y pinzamiento aórtico. La mortalidad global es del 54%, la exsanguinación representa el 85% de la misma. El síndrome compartimental en el abdomen y en las extremidades, así como el círculo vicioso de la acidosis, la hipotermia y la coagulopatía son las principales complicaciones. Conclusiones: Las lesiones vasculares abdominales presentan una alta mortalidad y morbilidad. El conocimiento anatómico del retroperitoneo y de las vías de abordaje de los vasos así como una exploración clínica adecuada ayudaran a disminuir las complicaciones y la mortalidad de estos pacientes.

  15. Identificación del genotipo del virus del papiloma humano en pacientes portadoras de lesiones cérvico uterinas

    Directory of Open Access Journals (Sweden)

    Alexander Morales Fontaine

    2016-02-01

    Full Text Available Fundamento: en los últimos años se ha observado un elevado predominio de mujeres infestadas por genotipos del  Virus del Papiloma Humano considerados de alto riesgo por su elevada oncogenicidad.Objetivo: identificar los genotipos del Virus del Papiloma Humano en pacientes portadoras de este con lesiones cervicales, cuyas biopsias fueron analizadas en el departamento de anatomía patológica, perteneciente al Hospital General Docente ¨Ernesto Guevara de la Serna¨, en el período comprendido entre enero de 2013 a diciembre de 2014.Métodos: se realizó un estudio descriptivo, de corte transversal, en 45 pacientes cuyas biopsias fueron tomadas de forma aleatoria de un total de 456 casos en los que se encontraron evidencias histopatológicas de infección por el  Virus del Papiloma Humano, en el período referido período de estudio. Las biopsias fueron enviadas al Laboratorio de Biología Molecular del departamento de Virología del Instituto de Medicina Tropical ´´Pedro Kourí´, a fin de aislar e identificar los tipos de este virus, involucrados en la patogénesis de las lesiones premalignas en estudio. Se utilizaron fuentes secundarias dadas por los resultados de la identificación del genotipo del virus aislado enviados desde dicha institución. Los datos se procearon según la estadística descriptiva, mediante el análisis porcentual.Resultados: en el 88,8 % de la muestra se obtuvo infestación por el Virus del Papiloma Humano, de alto riesgo de oncogenicidad, de ellos hay una preponderancia del genotipo 16, con 26 casos (57,7 % seguido del 31 con 12 aislamientos (26,6 % y 2 pacientes presentaron el genotipo 52 para el 4,4 %. El 6,6 % de la muestra resultó estar infestadas por el genotipo 11, el cual es considerado de bajo riesgo y en 2 casos no fue posible realizar la tipificación.Conclusiones: Existió gran predominio de pacientes afectadas por Virus de Papiloma Humano de alto riesgo de oncogenicidad.

  16. Iris Recognition Using Wavelet

    Directory of Open Access Journals (Sweden)

    Khaliq Masood

    2013-08-01

    Full Text Available Biometric systems are getting more attention in the present era. Iris recognition is one of the most secure and authentic among the other biometrics and this field demands more authentic, reliable and fast algorithms to implement these biometric systems in real time. In this paper, an efficient localization technique is presented to identify pupil and iris boundaries using histogram of the iris image. Two small portions of iris have been used for polar transformation to reduce computational time and to increase the efficiency of the system. Wavelet transform is used for feature vector generation. Rotation of iris is compensated without shifts in the iris code. System is tested on Multimedia University Iris Database and results show that proposed system has encouraging performance.

  17. TAPIOCA MELANOMA OF THE IRIS

    NARCIS (Netherlands)

    DEKEIZER, RJW; OOSTERHUIS, JA; HOUTMAN, WA; DEWOLFFROUENDAAL, D

    Clinical identification of tapioca melanoma of the iris is important because its medical treatment may differ from that of other malignant iris melanomas. The characteristic iris nodules must be differentiated from granulomatous uveitis, metastases, and Lisch nodules (neurofibromatosis). We will

  18. Efectividad del biofeedback electromiográfico en la rehabilitación de lesiones deportivas

    Directory of Open Access Journals (Sweden)

    Antonio Hern\\u00E1ndez-Mendo

    2014-01-01

    Full Text Available La utilización del biofeedback electromiográfico (BF-EMG en la rehabilitación de lesiones está sobradamente referenciada en la literatura psicológica. A pesar de los trabajos pioneros en la década de los años ochenta, en el ámbito deportivo, apenas ha transcendido su utilización en la rehabilitación de lesiones deportivas. Se presenta un estudio de doce casos de futbolistas profesionales de la liga española agrupados en dos tipos de patologías distintas (fracturas en los miembros superiores y lesiones de rodilla que han sido sometidos a un tratamiento de BF-EMG, paralelo al plan de rehabilitación establecido por los servicios médicos de cada club. Se utiliza un diseño ABA. En cada sesión se registra una línea pre y post que permite determinar la ganancia EMG adquirida en cada punto de la sesión. La intervención se da por finalizada cuando el futbolista alcanza de forma estable el criterio establecido por el miembro hemilateral. En todos los casos se realiza una sesión más de seguimiento. Todos los casos presentan mejorías notorias y estables. Los resultados globales permiten considerar que el BF-EMG es eficaz en estas patologías.

  19. Versatilidad del colgajo en hacha para reconstrucción de lesiones en punta de dedo

    Directory of Open Access Journals (Sweden)

    A. Fernández García

    Full Text Available El colgajo en hacha descrito por Emmet, ha sido recientemente aplicado por Tuncali et al. en amputaciones de punta de dedo. Este sencillo colgajo triangular puede ser utilizado tanto en amputaciones transversas como oblicuas. El objetivo del estudio es presentar nuestra experiencia con este versátil colgajo en la reconstrucción de punta de dedo. Incluimos en el estudio 5 pacientes que completaron un periodo de seguimiento de un año. El nivel de amputación fue considerado de acuerdo con la clasificación de Ishikawa. Los pacientes fueron preguntados por la existencia de intolerancia al frío, hipersensibilidad y dolor. Empleamos diferentes diseños del colgajo en hacha que se aplicaron en pacientes pediátricos y adultos con amputaciones múltiples, lesiones del primer dedo del pie o de la mano, de dedos largos y en reconstrucciones con doble colgajo. La media de tamaño del defecto fue 2,2 x 1,4 cm. En todos los pacientes el colgajo aportó almohadillado protector y resultados estéticos. Se observó rigidez articular en un paciente debido a la combinación con un colgajo de dedo cruzado. El objetivo de toda reconstrucción de punta de dedo es proveer cobertura pulpar suficiente al hueso para evitar inestabilidad y pérdida de sensibilidad como consecuencia de la reconstrucción. El colgajo en hacha es una opción versátil y segura para la reconstrucción de punta de dedo. Los diferentes diseños pueden ser usados conforme a nuestras necesidades.

  20. Lesiones musculares en el mundo del deporte. [Muscular injuries in the world of the sport

    Directory of Open Access Journals (Sweden)

    María Ángeles Cardero Durán

    2009-12-01

    Full Text Available Resumen En el mundo del deporte y no solo en este, sino en toda la práctica de una actividad física, son muy frecuentes las lesiones musculares. Hay muchos tipos de lesiones musculares de los que hablaremos más adelante, como pueden ser desgarros musculares, calambres, contracturas etc., que tienen mayor incidencia en la musculatura poli-articular, por condiciones de acumulación de fatiga, trabajo no realizado correctamente, o condiciones ambientales desfavorables. Es importante el diagnóstico y el tratamiento precoz, para poder intervenir y conseguir que el deportista vuelva lo antes posible a su actividad y al proceso de competición. En este artículo hablaremos de los distintos tipos de lesiones musculares, de las causas y mecanismos de producción, así como del tratamiento fisioterápico que se emplea en un deportista en estos casos. Palabras claves: Lesión, músculo, deporte. Abstract In the world of the sport and not only in this one, but in the whole practice of a physical activity, the muscular injuries are very frequent. There are many types of muscular injuries about which we are going to speak later, like can be muscular tears, cramps, contractions etc. That have major incident in the musculature poly-articulate, because of conditions of accumulation of fatigue, the work not done correctly, or  unfavorable environmental conditions.  The diagnosis and the precocious treatment is important, to be able to intervene and achieve that the sportsman come back as soon as possible to the activity and to the process of competition.  In this article we are going to speak about the different types of muscular injuries, about the reasons and mechanisms of production, as well as about the physical therapy diagnosed in these cases.  Key words: Injury, muscle, sport

  1. Iris and periocular biometrics

    CERN Document Server

    Rathgeb, Christian

    2017-01-01

    This book provides an overview of scientific fundamentals and principles of iris and periocular biometric recognition. It covers: an introduction to iris and periocular recognition; a selective overview of issues and challenges; soft biometric classification; security aspects; privacy protection and forensics; and future trends.

  2. Eficacia del manejo electroquirúrgico con asa diatérmica para eliminar el virus papiloma causante de lesiones cervicales

    OpenAIRE

    Jaqueline Canul-Canché; Nicolás Gustavo Suárez-Guerrero; Nicolás Gustavo Suárez-Puerto; María del Refugio González-Losa

    2013-01-01

    Introducción: La infección por el virus del papiloma humano (VPH) es causa del cáncer cervicouterino y sus lesiones precursoras; la efectividad del tratamiento de estas últimas se evalúa por histopatología. Sin embargo, la persistencia del virus puede condicionar la aparición de nuevas lesiones. Objetivos: Evaluar la eficacia de la electrocirugía con asa diatérmica para la eliminación del VPH en pacientes con lesiones cervicales. Diseño: Estudio prospectivo, descriptivo, longitudinal y observ...

  3. Noncooperative Iris Segmentation

    Directory of Open Access Journals (Sweden)

    Elsayed Mostafa

    2012-01-01

    Full Text Available In noncooperative iris recognition one should deal with uncontrolled behavior of the subject as well as uncontrolled lighting conditions. That means eyelids and eyelashes occlusion, non uniform intensities, reflections, imperfect focus, and orientation among the others are to be considered. To cope with this situation a noncooperative iris segmentation algorithm based on numerically stable direct least squares fitting of ellipses model and modified Chan-Vese model (local binary fitting energy with variational level set formulation is to be proposed. The proposed algorithm is tested using CASIA-IrisV3.

  4. Lesiones vasculares abdominales: El desafío del cirujano de trauma

    Directory of Open Access Journals (Sweden)

    Juan A Asensio

    2001-06-01

    Full Text Available Introducción: Las lesiones vasculares abdominales presentan los mayores índices de mortalidad y morbilidad de entre todas las lesiones que puede sufrir un enfermo traumático. Método: Revisión de la clínica, diagnóstico, vías de abordaje y tratamiento de los pacientes con lesiones vasculares intraabdominales, basada en la experiencia en el manejo de 302 enfermos. Resultados: Las heridas penetrantes abdominales constituyen entre el 90%-95% de las lesiones que afectan a los vasos abdominales. La lesión abdominal multiorgánica es frecuente. Los hallazgos clínicos compatibles con hemoperitoneo o peritonitis y la ausencia de pulsos femorales son tributarios de laparotomía. En los pacientes que presentan paro cardio-respiratorio, se debe realizar toracotomía de urgencia para masaje cardiaco abierto y pinzamiento aórtico. La mortalidad global es del 54%, la exsanguinación representa el 85% de la misma. El síndrome compartimental en el abdomen y en las extremidades, así como el círculo vicioso de la acidosis, la hipotermia y la coagulopatía son las principales complicaciones. Conclusiones: Las lesiones vasculares abdominales presentan una alta mortalidad y morbilidad. El conocimiento anatómico del retroperitoneo y de las vías de abordaje de los vasos así como una exploración clínica adecuada ayudaran a disminuir las complicaciones y la mortalidad de estos pacientes.Aim: Abdominal vascular injuries have a very high mortality and morbidity rates among trauma patients. Methods: This is a clinical review of the diagnosis, surgical procedures, and treatment of patients with abdominal vascular injuries, based on the clinical experience from 302 patients presenting this type of injury. Results: Penetrating injuries account for 90% to 95% of all abdominal vascular injuries. Mutiple organ injuries are frequent. The clinical sings of a hemoperitoneum and or peritonitis and the absence of femoral pulses are indications for laparatomy. In the

  5. A identificação da ansiedade por meio da análise da íris: uma possibilidade La identificación de la ansiedad a través del análisis de iris: una posibilidad The identification of anxiety through the analysis of the iris: a possibility

    Directory of Open Access Journals (Sweden)

    Léia Fortes Salles

    2012-03-01

    Full Text Available A ansiedade é um comportamento relacionado com doenças psicossomáticas. Por meio da avaliação da íris é possível determinar características de personalidade e intervir precocemente para evitar que algum comportamento mal adaptativo colabore para o desenvolvimento de uma doença. Os anéis de tensão sugerem predisposição para ansiedade. O objetivo deste trabalho foi verificar a correlação dos anéis de tensão presentes na íris com o Inventário de Diagnóstico da Ansiedade Traço-Estado (IDATE. Após aprovação pelo Comitê de Ética e Pesquisa, o estudo foi realizado com 62 funcionários do Centro de Aperfeiçoamento em Ciências da Saúde da Fundação Zerbini entre maio e julho de 2010. O coeficiente de correlação de Spearman mostrou correlação positiva e significativa entre o escore do IDATE e a quantidade dos anéis de tensão, sugerindo que a presença destes sinais indicam maior predisposição para ansiedade. Com a identificação precoce deste comportamento temos chances de diminuir o desenvolvimento de doenças.La ansiedad es uno de los comportamientos asociados a las enfermedades psicosomáticas. A través de la evaluación del iris es posible determinar los rasgos de personalidad y de intervención temprana para prevenir una mala conducta y evitar desarrollar una enfermedad. Los anillos de tensión sugieren una predisposición a la ansiedad. El objetivo de este estudio fue evaluar la correlación de los anillos de estrés presentes en el iris con el Inventario Diagnóstico de Ansiedad Rasgo-Estado (IDATE. Después de la aprobación por el Colegio de Ética e Investigación, la encuesta se llevó a cabo con 62 funcionarios del Centro para el Avance de las Ciencias de la Salud Fundación Zerbini entre mayo y julio de 2010. El coeficiente de correlación de Spearman mostró una correlación positiva y significativa entre la puntuación del IDATE y la cantidad de anillos de tensión, lo que sugiere que la presencia de

  6. IS (Iris Security)

    OpenAIRE

    Iovane, G.; Tortoriello, F. S.

    2003-01-01

    In the paper will be presented a safety system based on iridology. The results suggest a new scenario where the security problem in supervised and unsupervised areas can be treat with the present system and the iris image recognition.

  7. Iris Recognition Technique

    Institute of Scientific and Technical Information of China (English)

    XIE Mei

    2006-01-01

    The demand on security is increasing greatly in these years and biometric recognition gradually becomes a hot field of research. Iris recognition is a new branch of biometric recognition, which is regarded as the most stable, safe and accurate biometric recognition method. In these years, much progress in this field has been made by scholars and experts of different countries. In this paper, some successful iris recognition methods are listed and their performance are compared. Furthermore, the existing problems and challenges are discussed.

  8. A Novel Iris Segmentation Scheme

    Directory of Open Access Journals (Sweden)

    Chen-Chung Liu

    2014-01-01

    Full Text Available One of the key steps in the iris recognition system is the accurate iris segmentation from its surrounding noises including pupil, sclera, eyelashes, and eyebrows of a captured eye-image. This paper presents a novel iris segmentation scheme which utilizes the orientation matching transform to outline the outer and inner iris boundaries initially. It then employs Delogne-Kåsa circle fitting (instead of the traditional Hough transform to further eliminate the outlier points to extract a more precise iris area from an eye-image. In the extracted iris region, the proposed scheme further utilizes the differences in the intensity and positional characteristics of the iris, eyelid, and eyelashes to detect and delete these noises. The scheme is then applied on iris image database, UBIRIS.v1. The experimental results show that the presented scheme provides a more effective and efficient iris segmentation than other conventional methods.

  9. Ultrasound-guided percutaneous biopsy of digestive tract lesions; Biopsia percutanea de lesiones del tubo digestivo guiada por ecografia

    Energy Technology Data Exchange (ETDEWEB)

    Gil, S.; Martin, I.; Ballesteros, J. M.; Gomez, C. [Hospital General Universitario de Alicante (Spain); Marco, S. F.; Fernandez, P. [Hospital Gneral de Castellon (Spain)

    1999-07-01

    To present our experience in ultrasound-guided percutaneous biopsy of lesions located in the digestive tract. We performed ultrasound-guided percutaneous biopsy in 14 patients (10 men and 4 women) ranging in age from 7 to 71 years (mean; 519 years). The lesions were located throughout the digestive tract, from the pyriform sinus to the sigmoid colon. The biopsy was carried out with a 5 MHz convex probe equipped with a device to direct the needle. An 18G automatic needle or a 20G Chiba needle was used to obtain specimens for histological study in every case, and additional samples were collected with a 22G needle for cytological examination in 13 of the patients. The ultrasound images corresponded to pseudokidney in 9 cases and extrinsic masses in 5. The diagnosis was obtained from the histological examination in every case (100%) and from cytology in 6 (44.4%), the latter results were less specific. The only complication corresponded to a case of bilioperitoneum. Ultrasound-guided percutaneous biopsy is a suitable technique for the histological diagnosis of those lesions of the digestive tract that are visible in ultrasound images, but that for some reason can not be examined by endoscopic biopsy. (Author) 20 refs.

  10. Lesiones del himen en la determinación médico legal de la integridad sexual

    Directory of Open Access Journals (Sweden)

    José Pacheco D

    2005-12-01

    Full Text Available Objetivo: Determinar las lesiones himeneales y sus variantes morfológicas. Materiales y Métodos: Se realizó un estudio descriptivo prospectivo de julio a agosto del 2005. Resultados: Hubo 284 exámenes por denuncias de VS; 80,3% correspondió a niños y adolescentes. Los principales hallazgos fueron himen dilatable (36,9%, himen íntegro (34,8%, desgarros antiguos (13.6%, himen dilatable con lesiones recientes (4,5%, desgarros recientes (1,5%, entre otros. Conclusiones: El himen muy elástico que presenta un orificio amplio, crea dificultad en el reconocimiento de lesiones recientes. Determinar un himen ‘complaciente’ o ‘dilatable’ no niega categóricamente la introducción del pene u otro miembro del cuerpo u objeto. La Medicina Legal enseña las variantes himeneales y sus principales lesiones para que todo examinador tenga el suficiente criterio técnico y científico al momento de acreditar sus hallazgos ante una autoridad judicial o fiscal.

  11. Estudio de la mejora de la estabilidad del tobillo, a partir de un programa de conexi??n de lesiones

    OpenAIRE

    Azanza Alvira, Javier

    2015-01-01

    Las lesiones deportivas son uno de los problemas m??s comunes en la sociedad moderna-occidental. Los esguinces de tobillo pueden provocar, no s??lo contrariedades a nivel deportivo, sino en un futuro, va a aumentar la probabilidad de aparici??n de osteoartritis y de inestabilidad cr??nica de tobillo que puede provocar una disminuci??n del nivel de actividad f??sica que conlleva a un descenso de la calidad de vida. Viendo la importancia que tiene prevenir estas lesiones, especialmente las d...

  12. Lesiones traumáticas de los anexos y del segmento anterior del ojo en los boxeadores Traumatic lesions of the adnexa and of the anterior segment of the eye in fighters

    Directory of Open Access Journals (Sweden)

    Agustín Fernández Sánchez

    2003-06-01

    Full Text Available Se realizó un estudio retrospectivo con una muestra de 71 boxeadores a los cuales se les examinaron las estructuras de referencia mediante oftalmoscopia directa y biomicroscopia ocular, antes de las 6 horas posteriores al término de sus peleas; donde se obtuvo como resultado que los anexos afectados fueron los párpados con 5 hematomas, 4 edemas y 1 excoriación; y la conjuntiva con 4 hiperemias y 8 hemorragias. En el segmento anterior del ojo sólo se afectó la córnea con 13 lesiones en total, divididas en 10 excoriaciones superficiales y 3 profundas. Las lesiones traumáticas predominantes en los anexos del ojo son las de los párpados y las de la conjuntiva y las del segmento anterior del ojo, las de la córnea. El ojo más afectado fue el izquierdo y las lesiones más frecuentes fueron en las categorías de 13 y 14, 17 y 18 y 19 y 34 años las corneales, las conjuntivales y la de los párpados, respectivamente.A retrospective study was carried out with a sample of 71 fighters, whose reference structures were examined by direct ophthalmoscopy and ocular biomicroscopy within the 6 hours following their fights. As a result, it was observed that the affected adnexa were the eyelids with 5 hematomas, 4 edemas and 1 excoriation; and the conjunctiva with 4 hyperemias and 8 hemorrhages. In the anteriro segment, only the cornea was affected with 13 lesions in all, divided into 10 superficial and 3 deep excoriations.The traumatic lesions prevailing in the adnexa of the eye are those of the eyelids and the conjunctiva, whereas the predominating traumatic lesions of the anterior segment of the eye are those of the cornea. The left eye was the most affected and the most frequent lesions were in the categories 13 and 14, 17 and 18 and 19 and 34 years old in the cornea, the conjunctiva and the eyelids, respectively.

  13. Lesiones causadas por helmintos del aparato digestivo en peces estuarinos de la Laguna Tres Palos, Guerrero, México

    OpenAIRE

    Ramón Vázquez Núñez; José Ramírez Lezama; David Osorio Sarabia; Larisa Adriana Chávez Soriano; Fernando Constantino Casas

    2004-01-01

    Se realizó el presente estudio con el fi n de identificar y comparar las lesiones macro y microscópicas asociadas a helmintos en el tracto digestivo del Ariopsis guatemalensis (“cuatete”) y Eleotris picta (“alahuate”) de la Laguna de Tres Palos, Guerrero, México. En Mayo, Julio y Diciembre del 2001 se colectaron 30 peces de cada especie. A 15 individuos de cada muestra se les practicó el examen histopatológico y a los 15 restantes el examen parasitológico. Se identifi caron tres grupos de hel...

  14. Lesiones abiertas del plexo braquial con compromiso vascular concomitante. Revisión sistemática de la literatura.

    OpenAIRE

    Arteaga Vergara, Diego Andres; Zambrano Caro, Gladys Cecilia; Penagos Castañeda, Juan Carlos

    2013-01-01

    La presente investigación, intenta generar un impacto positivo dentro del ámbito médico-quirúrgico, ya que se espera que la revisión de la literatura genere mayor conocimiento sobre el manejo de las lesiones del plexo braquial con lesión vascular concomitante, ocasionada mediante un trauma abierto por herida causada por arma corto punzante, y con base en esto proponer una guía de manejo que se pueda aplicar en el día a día de todos aquellos especialistas quirúrgicos y no quirúrgicos para el t...

  15. Lesiones naturales y regeneración de tejido en ramets del coral Montastraea annularis (Scleractinia: Faviidae en un arrecife degradado del Caribe Colombiano

    Directory of Open Access Journals (Sweden)

    Elvira Alvarado Ch

    2009-12-01

    Full Text Available Las poblaciones de Montastraea annularis muestran síntomas de declinamiento y sin embargo, pocos estudios se han realizado sobre tipos, frecuencias e intensidad de lesiones naturales in situ. Durante un año, septiembre 2003 a septiembre 2004, se hizo el seguimiento anual de lesiones naturales que aparecieron en ramets sanos de una población en un arrecife degradado dentro de un Área Marina Protegida, para inferir su efecto en la estructura de talla de la población. El 94% de los ramets presentaron lesiones causadas por blanqueamiento, depredación e interacciones con algas, esponjas y bioerodadores. La depredación causó el 47% y la interacción con algas el 36%. El 85% de las lesiones eran de tallas pequeñas (60% de su tejido vivo en los meses de septiembre a noviembre, pero la recuperación fue del 100% a los tres meses. Por el contrario, las lesiones con algas (36%, mostraron menor recuperación (6.7% y una tendencia a aumentar el área de lesión con el tiempo. En general, el porcentaje de área de tejido afectada por lesiones en un ramet durante cualquier mes fue menor a 10%. Sin embargo, de mayo a septiembre el porcentaje de tejido afectado fue mayor (10-50% debido al incremento en la frecuencia y abundancia de depredación, blanqueamiento e interacción con algas, y a la menor tasa de recuperación. Al final de un año, las lesiones que no se recuperaron causaron mortalidad parcial en el 25% de los ramets. El efecto de las lesiones y la recuperación sobre el tamaño de los ramets evidenció disminución de talla a lo largo del año, y al final de este, significó que el 21% pasara a una clase de talla menor.Natural lesions and regeneration of ramets of Montastraea annularis (Scleractinia: Faviidae in a degraded reef of the Colombian Caribbean. Currently, Montastraea annularis populations are suffering from high partial mortality rates; yet few studies have determined type, frequency and intensity of natural lesions in situ. During

  16. Análisis comparativo del tipo básico del delito de lesiones en España y en Chile. Bases para una reforma

    OpenAIRE

    2010-01-01

    El objeto de esta investigación es un estudio sistemático y comparativo del delito de lesiones, fundamentalmente en lo que a su tipo básico se refiere y a su relación con el sistema del delito de lesiones concebido principalmente en España y en Chile. Sin perjuicio de que existen en España monografías sobre el tema, éstas fueron escritas hace ya algunos años, al cabo de los cuales no solo se han producido reformas legislativas, sino que además la dogmática penal ha avanzado mucho. Si bien es ...

  17. Iris - nimi marmortahvlilt / Tiit Tuumalu

    Index Scriptorium Estoniae

    Tuumalu, Tiit, 1971-

    2003-01-01

    Briti kirjanikust Iris Murdochist pajatava inglise-ameerika mängufilmist "Iris" eesti videolevisse jõudmise puhul. Võrreldakse inglise teatrilavastaja Richard Eyre filmidebüüti Elmo Nüganeni debüütfilmiga "Nimed marmortahvlil"

  18. Iris Recognition using Orthogonal Transforms

    Directory of Open Access Journals (Sweden)

    M.Mani Roja

    2012-12-01

    Full Text Available Iris Recognition is a biometric recognition technique in which features of the iris are used to uniquely identify individuals. Iris recognition has over the years emerged as one of the most accuratebiometric techniques as opposed to other biometric techniques like face, signature and fingerprint. First, the iris image is pre processed using canny edge detector using a Gaussian filter. The iris edge and the pupil edge are extracted using image morphological operation, image opening. After normalization of red, green and blue components of the colour iris using Euclidean distance method, they are combined to form the localized colour iris. For feature vectors extraction, orthogonal transforms like discrete cosine transform, discrete sine transform and discrete Fourier transform have been considered. The proposed iris recognition system is very time efficient and it takes less than 1 second to grant authentication.

  19. Lesiones cutáneas por presión en adultos hospitalizados en el Hospital Universitario del Valle, Cali.

    Directory of Open Access Journals (Sweden)

    Gladys Eugenia Canaval

    2009-10-01

    Full Text Available Durante un período de seis meses en adultos hospitalizados en el Servicio de Medicina Interna, Hospital Universitario del Valle (HUV, en Cali, Colombia, se identificó el riesgo de hacer lesiones cutáneas por presión, la presencia de las mismas y los factores que intervienen en su desarrollo . El riesgo de lesiones por presión se midió con la escala Braden entre las 36 y 48 horas del ingreso al servicio; se valoraron actividad física, movilidad, fricción, nutrición, percepción sensorial y humedad. La aparición o presencia de la lesión se evaluaron los días cuarto y octavo de la hospitalización; además se tomaron datos sociodemográficos, el diagnóstico de hospitalización, la hemoglobina y albúmina sérica. Casi 23% de los pacientes se clasificaron en riesgo. De los pacientes con riesgo, 52% desarrollaron lesiones por presión; de éstos 59% tenían más de dos lesiones, casi todas en el talón y en el sacrocoxis. Los mayores de 35 años presentaron más lesiones por presión. En más de la mitad del total de los pacientes con riesgo de desarrollar la entidad, la albúmina y la hemoglobina fueron inferiores a lo normal, con niveles más bajos para los que presentaron lesiones; las cifras de hemoglobina más bajas correspondieron a los hombres. Los factores que más aportaron al riesgo fueron fricción, actividad, movilidad y nutrición. Entre quienes presentaron lesiones por presión se identificaron además, cambios en los parámetros hemodinámicos y compromiso de la oxigenación. Lo anterior sugiere la importancia de incluir estos aspectos en los protocolos para prevenir estas lesiones.

  20. TAPIOCA MELANOMA OF THE IRIS

    NARCIS (Netherlands)

    DEKEIZER, RJW; OOSTERHUIS, JA; HOUTMAN, WA; DEWOLFFROUENDAAL, D

    1993-01-01

    Clinical identification of tapioca melanoma of the iris is important because its medical treatment may differ from that of other malignant iris melanomas. The characteristic iris nodules must be differentiated from granulomatous uveitis, metastases, and Lisch nodules (neurofibromatosis). We will dis

  1. Lesiones del nervio torácico largo de Bell. Revisión de conceptos terapéuticos

    Directory of Open Access Journals (Sweden)

    Sebastián E. Valbuena

    2014-03-01

    Full Text Available Re­su­men las lesiones del nervio torácico producen parálisis del serrato anterior y originan una deformidad característica (escápula alata, que genera debilidad y alteraciones importantes en la movilidad del hombro. En esta revisión, se analizan conceptos sobre anatomía, etiología, presentación clínica y alternativas terapéuticas. Long­ thoracic ­nerve ­of ­Bell. ­Review­ of­ therapeutic ­management Abstract The long thoracic nerve injuries are manifested by a characteristic deformity called scapula alata, causing weakness, and impaired shoulder mobility. in this review current concepts of the anatomy, etiology, clinical presentation and therapeutic management are analyzed.

  2. Acquired iris inclusion cysts

    Institute of Scientific and Technical Information of China (English)

    Aruna; Dharmasena; Priya; Bhatt; Jeffrey; Kwartz

    2014-01-01

    Dear Sir/Madam,The development of epithelial implantation cysts of the iris is rare and they pose a major therapeutic challenge due to the poor overall surgical outcome and high risk of recurrence.Several conservative and invasive treatment strategies such as needle aspiration,viscodissection,endolaser photocoagulation,endodiathermy,cryotherapy,

  3. Minilaparoscopic-assisted transvaginal approach in benign liver lesions Abordaje transvaginal asistido por minilaparoscopia en lesiones benignas del hígado

    Directory of Open Access Journals (Sweden)

    R. Castro-Pérez

    2010-06-01

    benignas del hígado tratadas quirúrgicamente mediante el abordaje transvaginal asistido por minilaparoscopia. Pacientes y métodos: mujeres de 44 y 45 años de edad, respectivamente. La paciente 1 presentaba un pequeño tumor de 1,2 cm de Ø, en el lóbulo izquierdo del hígado. En su preoperatorio no se logró precisar su etiología y se decidió extirparlo quirúrgicamente. La paciente 2 presentaba un quiste simple del hígado muy sintomático de 8 cm de Ø situado en el subsegmento VI, se negó a realizarse el tratamiento esclerosante por vía percutánea, por lo que se recomendó el tratamiento quirúrgico. Se les ofreció a ambas realizar la intervención mediante cirugía laparoscópica o el abordaje transvaginal, aceptando este último. El neumoperitoneo se realizó con presión de 15 mmHg. Se colocaron 2 minipuertos en abdomen, uno en región umbilical de 5 mm Ø y el otro de 3 mm Ø en el sitio más próximo a la lesión. Con visión directa se colocó 1 trocar en la pared posterior del fondo del saco vaginal de 11 mm Ø para el paso de un endoscopio rígido. En la paciente 1 se utilizó este mismo orificio para, adyacente al trocar, introducir un disector largo. En la paciente 2 se introdujo un segundo trocar de 5 mm Ø para el paso de instrumentos de trabajo. Ambos especímenes fueron extraídos a través de la vagina en bolsas extractoras. Se registró el tiempo quirúrgico, necesidad de analgésicos y complicaciones postoperatorias. Resultados: los tiempos quirúrgicos fueron de 51 y 73 minutos, respectivamente. La paciente operada del quiste hepático requirió administración de analgésico postoperatorio. El alta hospitalaria fue dada antes de las 24 horas de la intervención. No se han presentado complicaciones postoperatorias relacionadas con el proceder después de un seguimiento mínimo de 6 meses. Conclusiones: con el empleo de instrumentos rígidos, fue posible realizar el tratamiento quirúrgico de dos lesiones benignas del hígado, de poca

  4. Lesiones vasculares abdominales: El desafío del cirujano de trauma

    OpenAIRE

    Juan A Asensio; Salvador Navarro-Soto; Walter Forno; Gustavo Roldan; Luz María Rivas; Ali Salim; Vincent Rowe; Demetrios Demetriades

    2001-01-01

    Introducción: Las lesiones vasculares abdominales presentan los mayores índices de mortalidad y morbilidad de entre todas las lesiones que puede sufrir un enfermo traumático. Método: Revisión de la clínica, diagnóstico, vías de abordaje y tratamiento de los pacientes con lesiones vasculares intraabdominales, basada en la experiencia en el manejo de 302 enfermos. Resultados: Las heridas penetrantes abdominales constituyen entre el 90%-95% de las lesiones que afectan a los vasos abdominales. La...

  5. Redefinición del concepto y del abordaje de las lesiones por humedad: Una propuesta conceptual y metodológica para mejorar el cuidado de las lesiones cutáneas asociadas a la humedad (LESCAH

    Directory of Open Access Journals (Sweden)

    Joan-Enric Torra i Bou

    2013-06-01

    Full Text Available Actualmente se percibe una indefinición manifiesta acerca de la conceptualización y abordaje de las llamadas lesiones por humedad en los entornos clínicos, docentes e investigadores de nuestro país, que muy frecuentemente relacionan este término solo con las lesiones producidas por la orina y las heces. Dadas las diversas repercusiones que se intuye pueden tener este tipo de lesiones, se hace necesario consensuar y unificar los distintos aspectos relacionados con el cuidado de estas heridas. En el presente artículo, y siguiendo la tendencia internacional, se propone la adopción del término lesiones cutáneas asociadas a la humedad (LESCAH para referirnos a la inflamación y erosión de la piel causada por la exposición prolongada a diversas fuentes de humedad, incluyendo la orina o las heces, el sudor, el exudado de la herida, el moco o la saliva. Desde esta premisa, se presentan y describen los diferentes tipos de LESCAH identificados en la clínica. Y finalmente, para facilitar la integración de la valoración, prevención y tratamiento de los pacientes con algún tipo de LESCAH, se propone un plan básico de actuación -denominado con el acrónimo CASPROT- con los distintos objetivos e intervenciones a realizar en cada fase.

  6. Effects of Iris Surface Curvature on Iris Recognition

    Energy Technology Data Exchange (ETDEWEB)

    Thompson, Joseph T [ORNL; Flynn, Patrick J [ORNL; Bowyer, Kevin W [University of Notre Dame, IN; Santos-Villalobos, Hector J [ORNL

    2013-01-01

    To focus on objects at various distances, the lens of the eye must change shape to adjust its refractive power. This change in lens shape causes a change in the shape of the iris surface which can be measured by examining the curvature of the iris. This work isolates the variable of iris curvature in the recognition process and shows that differences in iris curvature degrade matching ability. To our knowledge, no other work has examined the effects of varying iris curvature on matching ability. To examine this degradation, we conduct a matching experiment across pairs of images with varying degrees of iris curvature differences. The results show a statistically signi cant degradation in matching ability. Finally, the real world impact of these ndings is discussed

  7. An efficient iris segmentation approach

    Science.gov (United States)

    Gomai, Abdu; El-Zaart, A.; Mathkour, H.

    2011-10-01

    Iris recognition system became a reliable system for authentication and verification tasks. It consists of five stages: image acquisition, iris segmentation, iris normalization, feature encoding, and feature matching. Iris segmentation stage is one of the most important stages. It plays an essential role to locate the iris efficiently and accurately. In this paper, we present a new approach for iris segmentation using image processing technique. This approach is composed of four main parts. (1) Eliminating reflections of light on the eye image based on inverting the color of the grayscale image, filling holes in the intensity image, and inverting the color of the intensity image to get the original grayscale image without any reflections. (2) Pupil boundary detection based on dividing an eye image to nine sub-images and finding the minimum value of the mean intensity for each sub-image to get a suitable threshold value of pupil. (3) Enhancing the contrast of outer iris boundary using exponential operator to have sharp variation. (4) Outer iris boundary localization based on applying a gray threshold and morphological operations on the rectangular part of an eye image including the pupil and the outer boundaries of iris to find the small radius of outer iris boundary from the center of pupil. The proposed approach has been tested on CASIA v1.0 iris image database and other collected iris image database. The experimental results show that the approach is able to detect pupil and outer iris boundary with high accuracy results approximately 100% and reduce time consuming.

  8. Lesiones altas del plexo braquial. Reconstrucción con técnicas combinadas de neurotización e injertos nerviosos

    OpenAIRE

    Enrique Vergara-Amador

    2015-01-01

    Antecedentes. Las lesiones altas del plexo braquial son reconstruidas con neurotización e injerto nervioso. El nervio espinal accesorio, la raíz C7, las ramas del tríceps y los nervios mediano y cubital son los más usados para transferencias. Objetivo. Mostrar la experiencia con neurotización de la rama inferior del nervio espinal accesorio (NEA) al nervio supraescapular (NSE), transferencia nerviosa de fascículos del nervio cubital o del mediano y, en ocasiones, injertos nerviosos hacia el n...

  9. Prevención de lesiones del ligamento cruzado anterior en deportistas femeninas. Revisión bibliográfica

    OpenAIRE

    Río Estella, Davinia

    2014-01-01

    Antecedentes: actualmente hay un gran número de lesiones de LCA ligadas a un mal plan de prevención, lo que conlleva a un gran coste sanitario. Objetivos: realizar una revisión sistemática para comprobar si son efectivos los programas de prevención de lesiones del ligamento cruzado anterior en mujeres deportistas. Metodología: búsqueda en bases de datos como Pubmed, Science Direct, Scopus, PEDro, Web of Knowledge y Cochrane Library. También del libro “prevención de lesiones en el deport...

  10. Research on Iris Region Localization Algorithms

    Directory of Open Access Journals (Sweden)

    Pravin S.Patil

    2014-10-01

    Full Text Available Iris recognition is a biometric technique that offers premium performance. Iris localization is critical to the success of an iris recognition system, since data that is falsely represented as iris pattern data will corrupt the biometric templates generated, resulting in poor recognition rates. So far different algorithms for iris localization having been proposed. This paper explored four efficient methods for iris localization, out of these three methods of iris localization in circular form and one methods of unwrapping the iris in to a flat bed. Experimental results are reported to demonstrate performance evaluation of every implemented algorithms. Conclusion based on comparisons can provide most significant information for further research. A CASIA and UPOL iris databases of iris images has been used for implementation of iris localization General Term Biometrics,Iris Recognition,Iris Localization

  11. Integrated risk information system (IRIS)

    Energy Technology Data Exchange (ETDEWEB)

    Tuxen, L. [Environmental Protection Agency, Washington, DC (United States)

    1990-12-31

    The Integrated Risk Information System (IRIS) is an electronic information system developed by the US Environmental Protection Agency (EPA) containing information related to health risk assessment. IRIS is the Agency`s primary vehicle for communication of chronic health hazard information that represents Agency consensus following comprehensive review by intra-Agency work groups. The original purpose for developing IRIS was to provide guidance to EPA personnel in making risk management decisions. This original purpose for developing IRIS was to guidance to EPA personnel in making risk management decisions. This role has expanded and evolved with wider access and use of the system. IRIS contains chemical-specific information in summary format for approximately 500 chemicals. IRIS is available to the general public on the National Library of Medicine`s Toxicology Data Network (TOXNET) and on diskettes through the National Technical Information Service (NTIS).

  12. Accurate and Fast Iris Segmentation

    Directory of Open Access Journals (Sweden)

    G. AnnaPoorani,

    2010-06-01

    Full Text Available A novel iris segmentation approach for noisy iris is proposed in this paper. The proposed approach comprises of specular reflection removal, pupil localization, iris localization and eyelid localization. Reflection map computation is devised to get the reflection ROI of eye image using adaptive threshold technique. Bilinear interpolation is used to fill these reflection points in the eye image. Variant of edge-based segmentation technique is adopted to detect the pupil boundary from the eye image. Gradient based heuristic approach is devised to detect the iris boundary from theeye image. Eyelid localization is designed to detect the eyelids using the edge detection and curve fitting. Feature sequence combined into spatial domain segments the iris texture patterns properly. Empirical results show that the proposed approach is effective and suitable to deal with the noisy eye image for iris segmentation.

  13. La carga de enfermedad y lesiones en el Perú y las prioridades del plan esencial de aseguramiento universal

    Directory of Open Access Journals (Sweden)

    Aníbal Velásquez

    2009-04-01

    Full Text Available Para la implementación del aseguramiento universal en salud en el Perú, se debe tener un paquete de cobertura de beneficios que debe ser financiado en forma obligatoria, el cual es denominado Plan Esencial de Aseguramiento en Salud (PEAS. La elaboración del PEAS debe corresponder a las condiciones que causen mayor carga de enfermedad. Para ello se hace una revisión de los principales resultados del estudio de carga de enfermedad y lesiones en el Perú, destacando que son las enfermedades no transmisibles las que generan la mayor cantidad de años de vida saludables perdidos (AVISA, las enfermedades neuropsiquiátricas son la categoría que ocupa el primer lugar y el diagnóstico que causa mayor perdida de AVISA son los accidentes de tránsito. Esta información ha servido para la inclusión de enfermedades regularmente no consideradas en los paquetes básicos de aseguramiento dentro del PEAS.

  14. Tratamiento con electrocauterización de las lesiones premalignas del cérvix

    OpenAIRE

    Israel Meza G.

    2014-01-01

    Se presentaron los resultados del tratamiento con electrocauterización de las neoplasias intraepiteliales del cérvix en 430 pacientes atendidas en el Hospital Universitario del Valle, en el Hospital San Juan de Dios y en el Centro Hospital Cañaveralejo en Cali, Colombia, entre 1982 y 1992. Inicialmente se seleccionaron 455 mujeres que consultaron con citologías anormales (inclusive Papanicolau II) con cambios coilocíticos y atipias inflamatorias. Para el análisis final sólo se incluyeron 430 ...

  15. Hombro doloroso y lesiones del manguito rotador Painful shoulder and rotator cuff disorders

    OpenAIRE

    Karla Mora-Vargas

    2008-01-01

    Se presenta el caso de una mujer de 52 años conocida sana, sin antecedentes positivos, quien inicia con dolor y disfunción del miembro superior izquierdo, la cual fue tratada con antiinflamatorios no esteroideos inicialmente, sin embargo, al persistir los síntomas y apoyado con estudios radiológicos recibe tratamiento inyectado a nivel del hombro. Cuadro que evoluciona posteriormente a ruptura del manguito rotador, con su subsiguiente reparación quirúrgica y fisioterapia, logrando la recupera...

  16. Tabaco y lesiones premalignas. Prevención del cáncer oral

    OpenAIRE

    Costela Serrano, Carmen; Murcia Gallardo, Gloria Rosa; Perandrés Yuste, Sergio Antonio

    2015-01-01

    Cartel presentado en la Segunda Conferencia Internacional de Comunicación en Salud, celebrada el 23 de octubre de 2015 en la Universidad Carlos III de Madrid Introducción: el cáncer de cabeza y cuello representa el 5% de todas las neoplasias del organismo. El carcinoma oral de células escamosas es la neoplasia maligna más frecuente en la cavidad oral. Su mortalidad a los cinco años es del 50%, de ahí la importancia del diagnóstico precoz y de su prevención. El precancer es una situación pr...

  17. MRI with SPIR sequences of optic nerve lesions; Utilita' delle sequenze 'Selective Partial Inversion Recover' (SPIR) nelle mallattie del nervo ottico

    Energy Technology Data Exchange (ETDEWEB)

    Pierallini, A.; Piattella, M.C.; Polli, N.S.A.; Bonamini, M.; Angeloni, U. [Rome Univ. La Sapienza (Italy). Dipt. di Scienze Neurologiche. Cattedra di Neuroradiologia e Istituto di Oftalmologia. Servizio di Radiologia; David, V.; Bozzao, L. [IRCCS Neuromed, Pozzilli, IS (Italy)

    1999-04-01

    To evaluate the yield of SPIR sequences with fat suppression in the diagnosis of optic nerve lesions. T1 and T2 weighted fat suppressed SPIR imaging of the optic nerve improves anatomical definition, lesion detection and characterization in optic nerve conditions. [Italian] L'articolo analizza i vantaggi ricavabili dall'utilizzazione delle sequenze SPIR nella documentazione del decorso del nervo ottico e delle sue alterazioni nei pazienti con sospetto clinico e strumentale di malattia retrobulbare. L'utilizzo delle sequenze SPIR consente ottimale visualizzazione del nervo ottico e delle sue eventuali alterazioni senza gli artefatti che limitavano la qualita' delle immagini nelle prime sequenze RM con soppressione del segnale del grasso.

  18. Iris image segmentation based on phase congruency

    Science.gov (United States)

    Gao, Chao; Jiang, Da-Qin; Guo, Yong-Cai

    2006-09-01

    Iris image segmentation is very important for an iris recognition system. There are always iris noises as eyelash, eyelid, reflection and pupil in iris images. The paper proposes a virtual method of segmentation. By locating and normalizing iris images with Gabor filter, we can acquire information of image texture in a series of frequencies and orientations. Iris noise regions are determined based on phase congruency by a group of Gabor filters whose kernels are suitable for edge detection. These regions are filled according to the characteristics of iris noise. The experimental results show that the proposed method can segment iris images effectively.

  19. Iris image Segmentation Based on Phase Congruency

    Institute of Scientific and Technical Information of China (English)

    GAO Chao; JIANG Da-qin; Guo Yong-cai

    2006-01-01

    @@ Iris image segmentation is very important for an iris recognition system.There are always iris noises as eyelash,eyelid,reflection and pupil in iris images.The paper proposes a virtual method of segmentation.By locating and normalizing iris images with Gabor filter,we can acquire information of image texture in a series of frequencies and orientations.Iris noise regions are determined based on phase congruency by a group of Gabor filters whose kernels are suitable for edge detection.These regions are filled according to the characteristics of iris noise.The experimental results show that the proposed method can segment iris images effectively.

  20. Tratamiento con electrocauterización de las lesiones premalignas del cérvix

    Directory of Open Access Journals (Sweden)

    Israel Meza G

    2014-11-01

    Full Text Available Se presentaron los resultados del tratamiento con electrocauterización de las neoplasias intraepiteliales del cérvix en 430 pacientes atendidas en el Hospital Universitario del Valle, en el Hospital San Juan de Dios y en el Centro Hospital Cañaveralejo en Cali, Colombia, entre 1982 y 1992. Inicialmente se seleccionaron 455 mujeres que consultaron con citologías anormales (inclusive Papanicolau II con cambios coilocíticos y atipias inflamatorias. Para el análisis final sólo se incluyeron 430 pacientes. A todas se les practicó colposcopia y biopsia dirigida y se confirmaba el diagnóstico de neoplasia intraepitelial del cérvix. Se hizo seguimiento con citología y colposcopia. Se obtuvo una respuesta global de 90.1% al primer tratamiento, respuesta que aumenta a 96.8% cuando se incluyeron las pacientes que respondieron a un segundo tratamiento. Se discuten las ventajas y desventajas del método con respeto a otros métodos existentes.

  1. Higiene postural para la prevención de lesiones y el desarrollo del cuidado enfermero

    OpenAIRE

    Gutiérrez Regidor, Alexandra

    2016-01-01

    Se estima que la prevalencia anual de dolor lumbar en población general oscila entre el 22 y el 65 % siendo esta la patología vertebral más frecuente.(1) Este trastorno ocasiona una incapacidad temporal que genera altos costes para la sociedad, “durante el año 2000, el 11,4 % del total de las IT que se tramitaron en España se debieron a dolor lumbar, cifra que ha ido aumentando paulatinamente hasta un 14,1% del total de las IT que se tramitaron en 2004”.(2) Por ello uno de los principales pro...

  2. Higiene postural para la prevención de lesiones y el desarrollo del cuidado enfermero

    OpenAIRE

    Gutiérrez Regidor, Alexandra

    2016-01-01

    Se estima que la prevalencia anual de dolor lumbar en población general oscila entre el 22 y el 65 % siendo esta la patología vertebral más frecuente.(1) Este trastorno ocasiona una incapacidad temporal que genera altos costes para la sociedad, “durante el año 2000, el 11,4 % del total de las IT que se tramitaron en España se debieron a dolor lumbar, cifra que ha ido aumentando paulatinamente hasta un 14,1% del total de las IT que se tramitaron en 2004”.(2) Por ello uno de los principales pro...

  3. Genotipado del VPH como herramienta pronóstica en las lesiones CIN I

    OpenAIRE

    Cortés Alaguero, Caterina

    2014-01-01

    La neoplasia intraepitelial cervical (CIN) y el cáncer cervicouterino constituyen un importante problema de salud para las mujeres en todo el mundo. Los datos obtenidos en las numerosas investigaciones realizadas hasta ahora, ponen de manifiesto la existencia de una estrecha relación entre la aparición de alteraciones de diverso grado de malignidad en el tracto genital femenino y la presencia y persistencia del virus del papiloma humano (VPH) de alto riesgo oncogénico. En los últimos 40...

  4. Caracterización de las lesiones derivadas del entrenamiento físico militar

    OpenAIRE

    Juan Sebastián Rodríguez Gómez; Julián Alberto Valenzuela Pinzón; Juan David Velasco Rodríguez; Laura Elizabeth Castro Jiménez; Paula Janyn Melo Buitrago

    2016-01-01

    Introducción: En busca del mejoramiento físico se han desarrollado diferentes formas y maneras de trabajar el cuerpo y así generar el óptimo desarrollo de este en las actividades diarias; es el caso del entrenamiento físico militar, el cual conlleva a unas altas exigencias físicas en los cadetes por el tiempo de concentración, las horas de entrenamiento y la densidad de las actividades las cuales se dan de manera diaria por lo que esta práctica se encuentra asociada inevitablemente con la apa...

  5. Función del kinesiólogo en la prevención y tratamiento de síntomas y lesiones de hombro en tenistas

    OpenAIRE

    Sansiñena, Magalí

    2011-01-01

    En el presente trabajo “Función del kinesiólogo en la prevención y el tratamiento de síntomas y lesiones de hombro en tenistas”, se ha realizado un relevamiento de datos a través de encuestas a 100 tenistas. Con el fin de conocer los síntomas y lesiones diagnosticadas más frecuentes del hombro y a partir de ahí establecer un protocolo de prevención y tratamiento. Teniendo en cuenta que la amplia variación de la actividad tenística permite que se produzcan gran variedad de le...

  6. Efecto citoprotector y antisecretor del aceite de Copaifera officinalis en lesiones gástricas inducidas en ratas

    Directory of Open Access Journals (Sweden)

    Jorge Arroyo

    2009-06-01

    Full Text Available Objetivos: Demostrar el efecto gastroprotector del aceite de Copaifera officinalis usando indometacina y ligadura de píloro en ratas. Diseño: Estudio preclínico. Lugar: Facultades de Medicina, de Farmacia y Bioquímica. Universidad Nacional Mayor de San Marcos, Lima, Perú. Material biológico: Ratas y aceite de copaiba. Intervenciones: Se colectó el aceite de copaiba en Ucayali, Pucallpa. La citoproteccción fue evaluada con indometacina, considerando un grupo control normal, indometacina, grupos de aceite de copaiba y omeprazol. Las lesiones de la mucosa gástrica fueron calificadas como las compatibles con necrosis local (tejido no viable, hiperemia, enrojecimiento presente y hemorragia, empleando la escala de puntaje observacional; y la úlcera, según la escala de Macallister modificado. El ensayo de antisecreción fue realizado por el modelo de ligadura del píloro, en el que 24 ratas albinas fueron divididas al azar en 3 grupos; un control, otro de aceite de copaiba 40mg/kg y un tercero de omeprazol 10 mg/kg. Después de 4 horas de ligazón, fueron sacrificados, extrayéndose los estómagos; con mucho cuidado se midió el volumen y se determinó el pH de la secreción gástrica, por potenciometría. Se realizó evaluación histopatológica según Devi. Principales medidas de resultados: Lesiones ulcerosas. Resultados: Los resultados indicaron 100% de efecto citoprotector con el aceite de copaiba y de 97,8% para el omeprazol (p<0,0001, ratificado con los hallazgos histopatológicos; la disminución del volumen de secreción fue 79,4% para omeprazol y 42,8% para el aceite de copaiba (p<0,001, con incremento del pH. Conclusiones: En condiciones experimentales, el aceite de copaiba fue efectivo como agente gastroprotector en ratas con inducción de úlcera gástrica.

  7. Manejo de lesiones abiertas del plexo braquial con compromiso vascular concomitante. Revisión sistemática de la literatura

    OpenAIRE

    Zambrano Caro, Gladys Cecilia; Penagos Castañeda, Juan Carlos; Arteaga Vergara, Diego Andres

    2013-01-01

    El manejo de las lesiones de plejo braquial ha sido ampliamente discutido e investigado, especialmente en las lesiones cerradas por tracción. Las lesiones abiertas con compromiso vascular, muchas veces comprometen la viabilidad de la extremidad o la vida del paciente; son de difícil manejo con prioridades distintas, tiempos de establecimiento de los procedimientos que varían respecto a los hallazgos con resultados funcionales pobres por el diagnostico tardío de la lesión nerviosa. Se plantean...

  8. Hombro doloroso y lesiones del manguito rotador Painful shoulder and rotator cuff disorders

    Directory of Open Access Journals (Sweden)

    Karla Mora-Vargas

    2008-12-01

    Full Text Available Se presenta el caso de una mujer de 52 años conocida sana, sin antecedentes positivos, quien inicia con dolor y disfunción del miembro superior izquierdo, la cual fue tratada con antiinflamatorios no esteroideos inicialmente, sin embargo, al persistir los síntomas y apoyado con estudios radiológicos recibe tratamiento inyectado a nivel del hombro. Cuadro que evoluciona posteriormente a ruptura del manguito rotador, con su subsiguiente reparación quirúrgica y fisioterapia, logrando la recuperación casi total de su funcionabilidad. El síndrome de hombro doloroso es cada vez más frecuente en la población asociado con el aumento en la expectancia de vida, la actividad física y los factores intrínsecos de la anatomía del cuerpo, por lo cual se hace importante su consideración diaria.A previously healthy 52 years old woman, started with pain and dysfunction of her left arm, at the beginning she was treated conservatively with NSAIDS. Her symptoms continued and based on radiographic studies, she recived therapeutic intra-articular shoulder injections. Her medical situation got worse, and she was to have a rotator cuff tear, she needed surgery to repair the tear and physical therapy, achieving almost total recovery of her shoulder function. Since painful shoulder syndrome has been increasing because of ageing, work and the body’s intrinsic factors, that’s why it is important to remind this medical condition.

  9. Bartus Iris biometrics

    Energy Technology Data Exchange (ETDEWEB)

    Johnston, R.; Grace, W.

    1996-07-01

    This is the final report of a one-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). We won a 1994 R&D 100 Award for inventing the Bartas Iris Verification System. The system has been delivered to a sponsor and is no longer available to us. This technology can verify the identity of a person for purposes of access control, national security, law enforcement, forensics, counter-terrorism, and medical, financial, or scholastic records. The technique is non-invasive, psychologically acceptable, works in real-time, and obtains more biometric data than any other biometric except DNA analysis. This project sought to develop a new, second-generation prototype instrument.

  10. Micropropagation of Iris sp.

    Science.gov (United States)

    Jevremović, Slađana; Jeknić, Zoran; Subotić, Angelina

    2013-01-01

    Irises are perennial plants widely used as ornamental garden plants or cut flowers. Some species accumulate secondary metabolites, making them highly valuable to the pharmaceutical and perfume industries. Micropropagation of irises has successfully been accomplished by culturing zygotic embryos, different flower parts, and leaf base tissues as starting explants. Plantlets are regenerated via somatic embryogenesis, organogenesis, or both processes at the same time depending on media composition and plant species. A large number of uniform plants are produced by somatic embryogenesis, however, some species have decreased morphogenetic potential overtime. Shoot cultures obtained by organogenesis can be multiplied for many years. Somatic embryogenic tissue can be reestablished from leaf bases of in vitro-grown shoots. The highest number of plants can be obtained by cell suspension cultures. This chapter describes effective in vitro plant regeneration protocols for Iris species from different types of explants by somatic embryogenesis and/or organogenesis suitable for the mass propagation of ornamental and pharmaceutical irises.

  11. Shape Adaptive, Robust Iris Feature Extraction from Noisy Iris Images

    Science.gov (United States)

    Ghodrati, Hamed; Dehghani, Mohammad Javad; Danyali, Habibolah

    2013-01-01

    In the current iris recognition systems, noise removing step is only used to detect noisy parts of the iris region and features extracted from there will be excluded in matching step. Whereas depending on the filter structure used in feature extraction, the noisy parts may influence relevant features. To the best of our knowledge, the effect of noise factors on feature extraction has not been considered in the previous works. This paper investigates the effect of shape adaptive wavelet transform and shape adaptive Gabor-wavelet for feature extraction on the iris recognition performance. In addition, an effective noise-removing approach is proposed in this paper. The contribution is to detect eyelashes and reflections by calculating appropriate thresholds by a procedure called statistical decision making. The eyelids are segmented by parabolic Hough transform in normalized iris image to decrease computational burden through omitting rotation term. The iris is localized by an accurate and fast algorithm based on coarse-to-fine strategy. The principle of mask code generation is to assign the noisy bits in an iris code in order to exclude them in matching step is presented in details. An experimental result shows that by using the shape adaptive Gabor-wavelet technique there is an improvement on the accuracy of recognition rate. PMID:24696801

  12. Influencia de la biomecánica en lesiones de rodilla del ciclista

    OpenAIRE

    Cerro Rodríguez, Belén

    2014-01-01

    El trabajo realizado explica las principales patologías de rodilla en ciclistas, comenzamos exponiendo la anatomía y biomecánica general, durante el pedaleo, las medidas correctas, posturas del ciclista, etc. Citamos los principales factores biomecánicos que pueden afectar a la articulación de la rodilla, y como modificarlos. Tras explicar estos factores, nombramos las principales patologías que pueden aparecer, escogiendo la más frecuente y realizando un diagnóstico diferencial con las demás...

  13. Influencia de la biomecánica en lesiones de rodilla del ciclista

    OpenAIRE

    Cerro Rodríguez, Belén

    2014-01-01

    El trabajo realizado explica las principales patologías de rodilla en ciclistas, comenzamos exponiendo la anatomía y biomecánica general, durante el pedaleo, las medidas correctas, posturas del ciclista, etc. Citamos los principales factores biomecánicos que pueden afectar a la articulación de la rodilla, y como modificarlos. Tras explicar estos factores, nombramos las principales patologías que pueden aparecer, escogiendo la más frecuente y realizando un diagnóstico diferencial con las demás...

  14. Lesiones laborales

    OpenAIRE

    2015-01-01

    Las lesiones laborales se producen por un esfuerzo repetitivo, cuando un exceso de presión se ejerce sobre una parte del cuerpo provocando lesiones óseas, articulares, musculares y daños en los tejidos. Los accidentes laborales también pueden producir una lesión en el organismo y esto sumado a diversos factores es un problema para la reinserción laboral de los trabajadores de la energía eléctrica. Objetivo: Establecer cuáles son las lesiones más frecuentes que afectan a los ...

  15. Ankeny - Yellow Flag Iris Control

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This project aims to inventory and map all existing stands of yellow flag iris within wetland habitats at Ankeny NWR, treat them with herbicide in late spring and...

  16. Iris Murdoch armastusest / Udo uibo

    Index Scriptorium Estoniae

    Uibo, Udo, 1956-

    2010-01-01

    Londoni Kingstoni ülikool omandas 50 000 naesterlingi eest 164 Iris Murdochi kirja prantsuse kirjanikule, keeleeksperimentaatorile Raymond Quenaule, millest selgub Murdochi ühepoolne ning vastamata jäänud tunne Quenau suhtes.

  17. Integrated Risk Information System (IRIS)

    Data.gov (United States)

    U.S. Environmental Protection Agency — EPA?s Integrated Risk Information System (IRIS) is a compilation of electronic reports on specific substances found in the environment and their potential to cause...

  18. Iris Murdoch armastusest / Udo uibo

    Index Scriptorium Estoniae

    Uibo, Udo, 1956-

    2010-01-01

    Londoni Kingstoni ülikool omandas 50 000 naesterlingi eest 164 Iris Murdochi kirja prantsuse kirjanikule, keeleeksperimentaatorile Raymond Quenaule, millest selgub Murdochi ühepoolne ning vastamata jäänud tunne Quenau suhtes.

  19. Academy Distance Learning Tools (IRIS)

    Data.gov (United States)

    Department of Transportation — IRIS is a suite of front-end web applications utilizing a centralized back-end Oracle database. The system fully supports the FAA Academy's Distance Learning Program...

  20. IRI-2016: Description and Introduction

    Science.gov (United States)

    Bilitza, Dieter; Watanabe, Shigeto; Truhlik, Vladimir; Altadill, David

    2016-07-01

    The International Reference Ionosphere (IRI) is recognized as the official standard for the ionosphere (COSPAR, URSI, ISO) and is widely used for a multitude of different applications as evidenced by the many papers in science and engineering journals that acknowledge the use of IRI (e.g., about 11% of all Radio Science papers each year and citations in 21 different journals in 2015). The improvement process of the model is continuing as new data become fully available and new modeling techniques provide a more optimal representation of the observed variation patterns. We will introduce and present the latest version of the IRI model (IRI-2016) and discuss the impact of the various improvements and new additions. Most importantly, two new models will be introduced for the F2 peak height, hmF2, that were developed based on ionosonde measurements and COSMIC radio occultation data, respectively. In addition IRI-2016 includes an improved representation of the ionosphere during the very low solar activities that were reached during the last solar minimum in 2008/2009. A number of other improvements and corrections were implemented in the model and will be discussed in this presentation. We will also report about recent IRI workshops and their findings and plans for the future.

  1. Iris: The VAO SED Application

    CERN Document Server

    Doe, Stephen; Busko, Ivo; D'Abrusco, Raffaele; Cresitello-Dittmar, Mark; Ebert, Richard; Evans, Janet; Laurino, Omar; McDowell, Jonathan; Pevunova, Olga; Refsdal, Brian

    2012-01-01

    We present Iris, the VAO (Virtual Astronomical Observatory) application for analyzing SEDs (spectral energy distributions). Iris is the result of one of the major science initiatives of the VAO, and the first version was released in September 2011. Iris combines key features of several existing software applications to streamline and enhance SED analysis. With Iris, users may read and display SEDs, select data ranges for analysis, fit models to SEDs, and calculate confidence limits on best-fit parameters. SED data may be uploaded into the application from IVOA-compliant VOTable and FITS format files, or retrieved directly from NED. Data written in unsupported formats may be converted using SedImporter, a new application provided with Iris. The components of Iris have been contributed by members of the VAO. Specview, contributed by STScI, provides a GUI for reading, editing, and displaying SEDs, as well as defining models and parameter values. Sherpa, contributed by the Chandra project at SAO, provides a libra...

  2. ANTIMICROBIAL ACTIVITY OF EXTRACTS OF IRIS HUNGARICA AND IRIS SIBIRICA

    Directory of Open Access Journals (Sweden)

    Kovalev V. M.

    2017-06-01

    Full Text Available Introduction. Referring to the latest data, infectious diseases command a large part of among the total number of pathologies in the world and are an important problem in medicine. The leading role in prevention and treatment of diseases of microbial origin belongs to antibacterial chemotherapeutic agents. Advantages of antibiotics of synthetic origin are the high activity compared to phytogenic drugs. But it is known that microorganisms can release the resistance to synthetic antibiotics, so the use of drugs based on the plant materials is appropriate: phytogenic drugs more rarely induce the formation of resistance of the strains of microorganisms, they have a gentle action, can be used for a long-term, have the low cost. Therefore, it is appropriate to examine the drug plants with the aim of determination their antibacterial activity.Iris hungarica Waldst et Kit. and Iris sibirica L. are the representatives of the family Iridaceae, genus Iris and they have a wide spectrum of the pharmacological activity. Biologically active substances that were recovered from plants of the genus Iris (tectoridin, iristectorigenin B, nigracin, kaempferol, quercetin, etc. exhibited an antitumor, antimicrobial, estrogenic, insecticidal, antiplasmatic, anticholinesterase action, they were the inhibitors of enzymes and exhibited the immunomodulatory properties, which made these plants perspective for the research study. Raw materials Irises are constituent components of more than 9 medicines. Materials and Methods. The objects of the study were the leaves and rhizomes of Iris hungarica and Iris sibirica that were prepared during the growing season in 2014 in the M.M. Gryshko National botanical garden (Kiev, Ukraine. The dry and lipophilic extracts from the leaves and rhizomes of Irises were used to establish the antimicrobial activity. For the study of extracts antimicrobial activity was used agar well diffusion method. According to the WHO recommendations the

  3. Lesiones altas del plexo braquial. Reconstrucción con técnicas combinadas de neurotización e injertos nerviosos

    Directory of Open Access Journals (Sweden)

    Enrique Vergara-Amador

    2015-01-01

    Full Text Available Antecedentes. Las lesiones altas del plexo braquial son reconstruidas con neurotización e injerto nervioso. El nervio espinal accesorio, la raíz C7, las ramas del tríceps y los nervios mediano y cubital son los más usados para transferencias. Objetivo. Mostrar la experiencia con neurotización de la rama inferior del nervio espinal accesorio (NEA al nervio supraescapular (NSE, transferencia nerviosa de fascículos del nervio cubital o del mediano y, en ocasiones, injertos nerviosos hacia el nervio musculocutáneo y al tronco posterior, y reconstrucción del nervio axilar en algunos casos. Materiales y métodos. Se revisan 42 pacientes con lesiones altas de plexo braquial, operados mediante combinación de neurotización e injertos nerviosos. Se hizo un seguimiento mínimo de 15 meses. Resultados. Las lesiones de 40 pacientes fueron producidas por accidente en moto. En 22 solo se transfirió el NSE con el NEA; con esto, se recuperó abducción de hombro de 33º. A 8 pacientes se les combinó con reparación del axilar; mejorando la abducción a 81º. En 30 pacientes con neurotización del nervio cubital o mediano para el bíceps, se obtuvo respuesta a los 3 o 4 meses. Al final, la flexión del codo era de 116º y M4. Conclusión. Los mejores resultados en hombro fueron con la combinación de NSE y del nervio axilar; con esta, se logró 81º de abducción. La rotación externa mejoró en 28,5% de los pacientes, con respuesta tardía. Mientras que la neurotización del bíceps con fascículos del cubital consiguió una flexión de 116º, muy comparable con otras series. Hoy esta técnica es el gold estandard para la reconstrucción de flexión del codo.

  4. Lesiones del nervio facial provocan alteraciones en las células microgliales en el sistema nervioso central

    Directory of Open Access Journals (Sweden)

    Jeimmy Cerón

    2016-12-01

    Full Text Available Introducción. El Laboratorio de Neurofisiología Comportamental de la Universidad Nacional de Colombia ha descrito modificaciones tanto estructurales como electrofisiológicas en neuronas piramidales de la corteza motora producidas por la lesión del nervio facial contralateral en ratas. Sin embargo, poco se conoce si dichos cambios neuronales también se acompañan de modificaciones en las células gliales circundantes. Objetivo. Caracterizar en ratas el efecto de la lesión unilateral del nervio facial sobre la activación y proliferación de células de la microglía en la corteza motora primaria contralateral. Materiales y métodos. Se realizaron experimentos de inmunohistoquímica para detectar células microgliales en tejido cerebral de ratas sometidas a lesión del nervio facial, sacrificadas a distintos tiempos luego de la misma. Se realizaron dos tipos de lesiones: reversible (por compresión, que permite recuperación de la función e irreversible (por corte, que provoca parálisis permanente. Los tejidos cerebrales de animales sin lesión (Control absoluto y con falsa cirugía (Sham se compararon con los de animales lesionados sacrificados a 1, 3, 7, 21 ó 35 días post-lesión. Resultados. Las células microgliales en la corteza motora de animales lesionados irreversiblemente mostraron signos de proliferación y activación desde los 3 hasta los 7 días post-lesión. La proliferación de las células microgliales en animales con lesión reversible fue significativa sólo a los 3 días post-lesión. Conclusiones. La lesión del nervio facial produce modificaciones en las células microgliales de la corteza motora primaria. Estas modificaciones podrían estar involucradas en la generación de los cambios morfológicos y electrofisiológicos descritos en las neuronas piramidales de la corteza motora que comandan los movimientos faciales.

  5. Análisis a largo plazo del cartílago producido por injertos libres de periostio tibial en lesiones articulares del cóndilo femoral del conejo

    OpenAIRE

    1999-01-01

    Propósito de estudio: Analizar la reparación de lesiones del cartílago articular con injertos libres de periostio. Material y Métodos: 36 conejos de Nueva Zelanda, de 4 a 6 semanas. Creación de úlcera condral en cóndilo femoral interno. Evolución espontánea en 18 animales. Tratamiento con injerto libre de periostio tibial fijado con Tissucol R en otros 18 animales. Sacrificio en grupos de 67 animales a las 8, 12 y 24 semanas. Valoración de resultados macroscópicos, histológicos e histoquímico...

  6. Efecto hepatoprotector del extracto hidroetanólico atomizado del maíz morado (Zea mays L. en lesiones hepáticas inducidas en ratas

    Directory of Open Access Journals (Sweden)

    Renán Hañari-Quispe

    2015-04-01

    Full Text Available Objetivos: Evaluar el efecto hepatoprotector del extracto hidroetanólico atomizado de Zea mays variedad morado sobre lesiones hepáticas inducidas en ratas. Diseño: Experimental. Institución: Laboratorio de Farmacología Experimental, Facultad de Medicina Humana, Universidad Nacional Mayor de San Marcos, Lima, Perú. Material biológico: Extracto hidroetanólico atomizado de maíz morado (EAM. Intervenciones: Se formó seis grupos de ratas machos (n=10, por cada grupo, se les administró fenobarbital a concentración de 0,5 g/L en agua potable ad líbitum por 15 días; posteriormente se administró tetracloruro de carbono (CCl a una dosis de 0,2 mL/kg, por vía oral. El diseño experimental fue el siguiente: G1: suero fisiológico (SSF; G2: CCl0,2 mL/kg (T;4G3: T+ 4 silimarina 25 mg/kg; G4: T + EAM 500 mg/kg; G5: T + EAM 1 000 mg/kg; G6: T + EAM 2 000 mg/kg. Principales medidas de resultados: Perfil hepático, especies reactivas al ácido tiobarbitúrico (TBARS en suero, índice hepático, observación histológica. Resultados: Se observó aumento significativo (p<0,05 en la actividad de alanina amino transferasa (ALT entre el grupo G2 y los grupos G3 y G4 (p<0,001. Hubo disminución significativa (p<0,05 de fosfatasa alcalina (FAL en el grupo G2 con respecto G1. El nivel de TBARS fue menor en el grupo que recibió 1 000 mg/kg de EAM con respecto al control. Las actividades de HDL-C y triglicéridos no mostraron diferencias significativas. Se ha observado la reducción de 60% de la lesión hepática, evidenciado con menor daño del hepatocito al estudio histológico. Conclusiones: El extracto hidroetanólico atomizado de maíz morado a la dosis de 1 000 mg/kg disminuyó las lesiones hepáticas inducidas en ratas.

  7. Iris reconstruction combined with iris-claw intraocular lens implantation for the management of iris-lens injured patients

    Science.gov (United States)

    Hu, Shufang; Wang, Mingling; Xiao, Tianlin; Zhao, Zhenquan

    2016-01-01

    Aim: To study the efficiency and safety of iris reconstruction combined with iris-claw intraocular lens (IOL) implantation in the patients with iris-lens injuries. Settings and Design: Retrospective, noncomparable consecutive case series study. Materials and Methods: Eleven patients (11 eyes) following iris-lens injuries underwent iris reconstructions combined with iris-claw IOL implantations. Clinical data, such as cause and time of injury, visual acuity (VA), iris and lens injuries, surgical intervention, follow-up period, corneal endothelial cell count, and optical coherence tomography, were collected. Results: Uncorrected VA (UCVA) in all injured eyes before combined surgery was equal to or <20/1000. Within a 1.1–4.2-year follow-up period, a significant increase, equal to or better than 20/66, in UCVA was observed in six (55%) cases, and in best-corrected VA (BCVA) was observed in nine (82%) cases. Postoperative BCVA was 20/40 or better in seven cases (64%). After combined surgery, the iris returned to its natural round shape or smaller pupil, and the iris-claw IOLs in the 11 eyes were well-positioned on the anterior surface of reconstructed iris. No complications occurred in those patients. Conclusions: Iris reconstruction combined with iris-claw IOL implantation is a safe and efficient procedure for an eye with iris-lens injury in the absence of capsular support. PMID:27146932

  8. Phase Correlation Based Iris Image Registration Model

    Institute of Scientific and Technical Information of China (English)

    Jun-Zhou Huang; Tie-Niu Tan; Li Ma; Yun-Hong Wang

    2005-01-01

    Iris recognition is one of the most reliable personal identification methods. In iris recognition systems, image registration is an important component. Accurately registering iris images leads to higher recognition rate for an iris recognition system. This paper proposes a phase correlation based method for iris image registration with sub-pixel accuracy.Compared with existing methods, it is insensitive to image intensity and can compensate to a certain extent the non-linear iris deformation caused by pupil movement. Experimental results show that the proposed algorithm has an encouraging performance.

  9. Uso del dispositivo SILS™ en cirugía transanal mínimamente invasiva para el manejo de lesiones benignas de recto

    OpenAIRE

    2012-01-01

    La cirugía transanal mínimamente invasiva fue descrita inicialmente en el año 2009 como un abordaje híbrido para lograr Ia resección endoluminal de lesiones rectales, surgiendo como una alternativa más económica al uso del TEM (Transanal endoscopic microsurgery). La resección transanal de pólipos, así como de pequeñas lesiones malignas rectales con instrumentos laparoscópicos y de puerto único, utiliza Ia tecnología desarrollada inicialmente para procedimientos desde un orificio natural como ...

  10. Evaluación de factores asociados a lesiones del tercio cervical de los elementos dentarios y su relación con el periodonto.

    OpenAIRE

    Busleiman, Federico José

    2015-01-01

    El tercio cervical dentario, el cual posee una íntima relación con los tejidos periodontales de sostén y protección, puede ser zona de asiento de lesiones cervicales cariosas (LCC), no cariosas (LCNC) y lesiones cervicales mixtas (LCM). OBJETIVO: identificar la frecuencia y características clínicas de cada tipo de lesión del tercio cervical, y su multicausalidad, a fin de establecer un patrón de factores de riesgo y la relación con tejidos periodontales. MATERIALES Y MÉTODOS: se realizó un es...

  11. Evaluación de factores asociados a lesiones del tercio cervical de los elementos dentarios y su relación con el periodonto.

    OpenAIRE

    Busleiman, Federico José

    2015-01-01

    El tercio cervical dentario, el cual posee una íntima relación con los tejidos periodontales de sostén y protección, puede ser zona de asiento de lesiones cervicales cariosas (LCC), no cariosas (LCNC) y lesiones cervicales mixtas (LCM). OBJETIVO: identificar la frecuencia y características clínicas de cada tipo de lesión del tercio cervical, y su multicausalidad, a fin de establecer un patrón de factores de riesgo y la relación con tejidos periodontales. MATERIALES Y MÉTODOS: se realizó un es...

  12. Quality assessment for online iris images

    CSIR Research Space (South Africa)

    Makinana, S

    2015-01-01

    Full Text Available Iris recognition systems have attracted much attention for their uniqueness, stability and reliability. However, performance of this system depends on quality of iris image. Therefore there is a need to select good quality images before features can...

  13. What Genes Tell about Iris Appearance

    DEFF Research Database (Denmark)

    Harder, Stine; Christoffersen, Susanne R.; Johansen, Peter

    2012-01-01

    are performed supporting that this SNP is very important for eye color expression. With the suggested image characterizations we are able to investigate the correlation between the phenotypic iris appearance and specific SNPs. This has potential for further investigation of the relation between DNA and iris......Predicting phenotypes based on genotypes is generally hard, but has shown good results for prediction of iris color. We propose to correlate the appearance of iris with DNA. Six single-nucleotide polymorphisms (SNPs) have previously been shown to correlate with human iris color, and we demonstrate...... that especially one of the six SNPs are correlated with iris appearance. To perform this analysis we need a method to model the iris appearance, and we suggest an iris characterization based on a bag of visual words, which gives us a similarity measure between images of eyes. We have a dataset of 215 eye images...

  14. Exploring New Directions in Iris Recognition

    CERN Document Server

    Popescu-Bodorin, Nicolaie

    2011-01-01

    A new approach in iris recognition based on Circular Fuzzy Iris Segmentation (CFIS) and Gabor Analytic Iris Texture Binary Encoder (GAITBE) is proposed and tested here. CFIS procedure is designed to guarantee that similar iris segments will be obtained for similar eye images, despite the fact that the degree of occlusion may vary from one image to another. Its result is a circular iris ring (concentric with the pupil) which approximates the actual iris. GAITBE proves better encoding of statistical independence between the iris codes extracted from different irides using Hilbert Transform. Irides from University of Bath Iris Database are binary encoded on two different lengths (768 / 192 bytes) and tested in both single-enrollment and multi-enrollment identification scenarios. All cases illustrate the capacity of the newly proposed methodology to narrow down the distribution of inter-class matching scores, and consequently, to guarantee a steeper descent of the False Accept Rate.

  15. IRIS Toxicological Review of Acrolein (2003 Final)

    Science.gov (United States)

    EPA announced the release of the final report, Toxicological Review of Acrolein: in support of the Integrated Risk Information System (IRIS). The updated Summary for Acrolein and accompanying toxicological review have been added to the IRIS Database.

  16. Automatic quantification of iris color

    DEFF Research Database (Denmark)

    Christoffersen, S.; Harder, Stine; Andersen, J. D.

    2012-01-01

    An automatic algorithm to quantify the eye colour and structural information from standard hi-resolution photos of the human iris has been developed. Initially, the major structures in the eye region are identified including the pupil, iris, sclera, and eyelashes. Based on this segmentation...... regions. The result is a blue-brown ratio for each eye. Furthermore, an image clustering approach has been used with promising results. The approach is based on using a sparse dictionary of feature vectors learned from a training set of iris regions. The feature vectors contain both local structural...... is completely data driven and it can divide a group of eye images into classes based on structure, colour or a combination of the two. The methods have been tested on a large set of photos with promising results....

  17. Eyelid Localization for Iris Identification

    Directory of Open Access Journals (Sweden)

    T. Ea

    2008-12-01

    Full Text Available This article presents a new eyelid localization algorithm based on a parabolic curve fitting. To deal with eyelashes, low contrast or false detection due to iris texture, we propose a two steps algorithm. First, possible edge candidates are selected by applying edge detection on a restricted area inside the iris. Then, a gradient maximization is applied along every parabola, on a larger area, to refine parameters and select the best one. Experiments have been conducted on a database of 151 iris that have been manually segmented. The performance evaluation is carried out by comparing the segmented images obtained by the proposed method with the manual segmentation. The results are satisfactory in more than 90% of the cases.

  18. Iris Identification Technology Based on Multiwavelets

    Institute of Scientific and Technical Information of China (English)

    Wei Lian-xin; Ma Fu-ming; Xu Tao; Li Zhi-hui; Wu Deng-feng

    2005-01-01

    A new method for iris identification based on multiwavelets is proposed. By means of the properties of multiwavelets,such as orthogonality, symmetry, vanishing moments and approximation order, the iris texture can be simply presented. A brief overview of muhiwavelets is presented at first. Iris identification system and iris texture feature presentation and recognition based on multiwavelets are introduced subsequently. And the experiment indicates the validity of this method finally.

  19. Iris mammillations in ocular melanocytosis.

    Science.gov (United States)

    Swann, Peter G

    2001-01-01

    Hyperpigmentation of the ocular tissues and of the skin around the eye is uncommon. In ocular melanosis, the episclera, uveal tract and the angle of the anterior chamber may be involved. Heterochromia iridis may be present, if the iris is affected. In oculodermal melanocytosis or the naevus of Ota, hyperpigmentation of the skin follows the distribution of the first and second divisions of the fifth cranial nerve. This report documents a patient with episcleral pigment, heterochromia iridis and numerous tiny pigmented nodules on the iris (mammillations). The possible significance of these findings is discussed.

  20. Some Refinement on Iris Localization Algorithm

    Directory of Open Access Journals (Sweden)

    Abikoye O.C

    2012-11-01

    Full Text Available Biometrics recognition is a common and reliable way to authenticate the identity of a living person based on physiological or behavioral characteristics. Iris recognition is one of the newer biometric recognition technologies used for personal identification. It is reliable and widely used. In general a typical iris recognition system consists of three basic module which include image acquisition, Iris Localization & pre-processing, Iris texture extraction & signature encoding and lastly Iris signature matching for recognition or verification. One of the most important steps in iris recognition systems is iris localization, which is related to the detection of the exact location and contour of the iris in an image. (i.e it defines the inner and outer boundaries of iris region Obviously, the performance of the identification system is closely related to the precision of the iris localization step. In this study, an efficient algorithm for iris localization is proposed. The algorithm proposed can accurately define both the inner and outer boundaries of the iris irrespective of the geometry it may be (circle or eclipse by capturing the parameters that represents the geometry.

  1. Automatic quantification of iris color

    DEFF Research Database (Denmark)

    Christoffersen, S.; Harder, Stine; Andersen, J. D.

    2012-01-01

    , the iris is resampled into a standardized quadratic coordinate system, where occluded and invalid regions are masked out. Secondly, a pixel classification approach has been evaluated with good results. It is based on a so-called Markov Random Field spatial classification into dominantly brown and blue...

  2. Texture based iris recognition system

    Science.gov (United States)

    Mehrotra, Hunny; Gupta, Phalguni; Kaushik, Anil K.

    2008-04-01

    The paper proposes an efficient iris recognition algorithm, obtained through the fusion of Haar Wavelet and Circular Mellin operator. The recognition system preprocesses the captured iris image to remove the effect of holes or spot of light lying on the pupillary region which creates problem in pupil localization. The processed image is localized by detecting inner and outer boundaries from the pupil center using maximum value of the spectrum image. Then the eyelids are detected by fitting a 3 rd degree polynomial on the suitable edge segments and removing the region occluded by eyelids from the normalized iris image. The features for the iris pattern are extracted using Haar Wavelet and Circular Mellin operator. The Haar Wavelet decomposition reduces the size of feature vector while Circular Mellin operator is used for rotation and scale invariant feature extraction. The features are compared using Hamming Distance method and the fusion is done at decision level using Conjunction rule. The recognizer is found to be more robust with accuracy level more than 95%.

  3. A giant traumatic iris cyst

    Institute of Scientific and Technical Information of China (English)

    Lott Pooi Wah; Tan Boon Hooi; Leow Sue Ngein; Shuaibah Abdul Ghani; Visvaraja AL Subrayan

    2015-01-01

    A 52 year-old construction worker presented with progressive painful blurring of vision in the left eye associated with redness for past 1 month. There was a history of penetrating injury in the same eye 10 years ago and he underwent primary wound toilet and suturing, lens removal with intraocular lens implantation. Slit lamp examination revealed a corneal scar at 9’oclock, a large transilluminant iris cyst superotemporally and adherent to corneal endothelium. It was extended from angle of the pupil and obstructing the visual axis. The patient underwent excision of an iris cyst through superior limbal incision. Viscodissection was done to separate the cyst from the corneal endothelium and underlying iris stroma. Trypan blue ophthalmic solution was injected into the cyst to stain the cyst capsule. Post operatively 7 days, vision improved to 6/7.5 without complication. There was no recurrence up to 1 year postoperation. Histopathological finding revealed a benign cyst mass lined by simple cuboidal to non-keratinized stratified squamous epithelium. We had achieved a good surgical outcome with no complication to date for our case study. We advocate this modified surgical method to completely remove iris cyst.

  4. IRIS Final Technical Progress Report

    Energy Technology Data Exchange (ETDEWEB)

    M. D. Carelli

    2003-11-03

    OAK-B135 This NERI project, originally started as the Secure Transportable Autonomous Light Water Reactor (STAR-LW) and currently known as the International Reactor Innovative and Secure (IRIS) project, had the objective of investigating a novel type of water-cooled reactor to satisfy the Generation IV goals: fuel cycle sustainability, enhanced reliability and safety, and improved economics. The research objectives over the three-year (1999-2002) program were as follows: First year: Assess various design alternatives and establish main characteristics of a point design; Second year: Perform feasibility and engineering assessment of the selected design solutions; Third year: Complete reactor design and performance evaluation, including cost assessment These objectives were fully attained and actually they served to launch IRIS as a full fledged project for eventual commercial deployment. The program did not terminate in 2002 at the end of the NERI program, and has just entered in its fifth year. This has been made possible by the IRIS project participants which have grown from the original four member, two-countries team to the current twenty members, nine countries consortium. All the consortium members work under their own funding and it is estimated that the value of their in-kind contributions over the life of the project has been of the order of $30M. Currently, approximately 100 people worldwide are involved in the project. A very important constituency of the IRIS project is the academia: 7 universities from four countries are members of the consortium and five more US universities are associated via parallel NERI programs. To date, 97 students have worked or are working on IRIS; 59 IRIS-related graduate theses have been prepared or are in preparation, and 41 of these students have already graduated with M.S. (33) or Ph.D. (8) degrees. This ''final'' report (final only as far as the NERI program is concerned) summarizes the work performed

  5. Implantes sintéticos biodegradables para el tratamiento de lesiones del cartílago rotuliano aisladas en pacientes jóvenes

    OpenAIRE

    2011-01-01

    Presentem un estudi prospectiu, a curt termini, de 10 pacients, per avaluar el resultat funcional i simptomàtic del tractament de la condropatia rotuliana mitjançant implants de polímers sintètics biodegradables. Es valora la clínica, qüestionaris (KOOS i SF-36) i RM, abans, als sis i dotze mesos de la cirurgia. Els resultats van ser satisfactoris en 8 dels 10 pacients. Per això pensem que el TruFitTM BGS Plug és una tècnica simple i eficaç per tractar les lesions del cartílag rotulià en paci...

  6. Lesiones tendinosas del tobillo en resonancia magnética: análisis retrospectivo en 548 estudios Tendinous lesions of the ankle in MRI: retrospective review in 548 exams

    Directory of Open Access Journals (Sweden)

    Marcelo F. Cabrini

    2009-03-01

    Full Text Available Objetivo: Determinar la prevalencia de las diversas lesiones tendinosas del tobillo y sus características iconográficas típicas en los pacientes sometidos a Resonancia Magnética (RM. Material y métodos: Se efectuó un análisis descriptivo, retrospectivo y de corte transversal, de 548 estudios de RM de tobillo durante un período de 18 meses (entre enero de 2006 y junio de 2007, que contabiliza el total de los exámenes obtenidos en resonadores de campo cerrado en Diagnóstico por Imágenes Adrogué y en las sedes Hospital Fiorito de Avellaneda y Fundación Científica del Sur. Resultados: Del total de exámenes (n=548, el 40.3% fueron realizados a pacientes de sexo femenino (n=221 y el 59.7% a pacientes de sexo masculino (n=327, con una edad promedio de 47.6 ± 17 años. El 60.5% de los estudios (n=331 no reveló alteraciones en ningún grupo tendinoso del tobillo, mientras que el 39.5% (n=217 demostró la presencia de algún tipo de patología tendinosa. Asimismo, 64 estudios (11.7% revelaron alteraciones en el tendón tibial posterior; 47 (8.6% en el tendón de Aquiles; 34 (6.2% en el tendón peroneo lateral corto; 27 (4.9% a nivel del tendón del flexor propio del hallux; 26 (4.7% en el tendón peroneo lateral largo; 10 (1.8% en el tendón flexor común de los dedos; 6 (1.1% en el tendón tibial anterior; y 3 (0.5% en el tendón extensor común de los dedos. Conclusiones: La RM constituye una excelente herramienta en la valoración de las diversas patologías tendinosas debido a su capacidad multiplanar y a su alto contraste tisular.Purpose: To determine the prevalence of several tendinous lesions of the ankle, and the MR imaging features that characterize these lesions. Materials and methods: MR images in 548 exams of ankle were retrospectively reviewed. These studies were performed during a 18-months period of time in 3 MR scanners at Hospital Fiorito (Avellaneda, Diagnóstico por Imágenes Adrogué, and Fundación Científica del Sur

  7. Detección del adn de papilomavirus humano en lesiones precancerosas y cancerosas de cuello uterino por reacción en cadena de la polimerasa, en bucaramanga, santander

    OpenAIRE

    2011-01-01

    Determinar la validez de la Reacción en Cadena de la Polimerasa (PCR) en el diagnóstico de la infección por el virus del papiloma humano (VPH), detectando diferentes tipos de VPH oncogénicos (16, 18, 31, 33 y 35) y no oncogénicos (6 y 11) en pacientes con lesiones precancerosas y cancerosas de cérvix y en pacientes control, estableciendo la prevalencia del virus en estas lesiones.

  8. Lesions of the buccal mucosa in elderly. A study performed in five family doctor´s office of health area III in Cienfuegos city. Lesiones de la mucosa bucal del adulto mayor. Un estudio en cinco consultorios del área III de Cienfuegos.

    Directory of Open Access Journals (Sweden)

    Mikhail Benet Rodríguez

    2005-12-01

    ás. Métodos: Estudio descriptivo con una muestra de 270 ancianos de uno y otro sexos, obtenida por muestreo simple aleatorio de un universo de 1014 individuos de 60 años de edad y más pertenecientes a cinco consultorios del Área III del municipio de Cienfuegos. A todos los individuos estudiados se les realizó examen físico detallado y un cuestionario donde se recogieron los datos de interés para el estudio. Resultados: Del total de los ancianos examinados, 26,7 % presentó lesiones mucosas de algún tipo con un predominio en el sexo femenino (17,8 %.Las lesiones más frecuentes fueron: estomatitis subprótesis (10 %, leucoplasia ( 6,2 % y épulis fisurado (4,4 % . Las localizaciones anatómicas más frecuentes de las lesiones mucosas fueron el paladar duro con 27 casos de estomatitis subprótesis, el surco alveolar con 11 épulis fisurados y la mucosa yugal con 4 casos de candidiasis y 7 leucoplasias. Conclusiones: Un alto porcentaje de esta población geriátrica presentó lesiones mucosas bucales de algún tipo. De ellos el sexo femenino fue el más afectado. Predominaron las lesiones de origen protésico y las lesiones premalignas. La localización predominante de las lesiones fue en el paladar duro, surco alveolar y mucosa bucal.

  9. Prevalencia y factores de riesgo de las lesiones de la mucosa oral en la población urbana del Uruguay

    Directory of Open Access Journals (Sweden)

    Beatriz Casnati

    Full Text Available Objetivo: El objetivo de este estudio fue determinar la prevalencia de las lesiones de la mucosa bucal e identificar los factores de riesgo en el desarrollo de las mismas en una muestra representativa de la población adulta urbana del Uruguay. Metodología: Se trata de un estudio transversal que registró 922 personas (537 F/385M, edades de 15-24, 35-44 y 65-74 años basado en un diseño muestral estratificado por conglomerado polietápico. A partir de los datos de la muestra se estimaron las prevalencias de cada entidad así como los intervalos de confianza al 95%. Resultados: La candidosis y las lesiones proliferativas se observaron en 26% y en 17% de las personas y se presentaron significativamente asociadas al género femenino. La prevalencia de la leucoplasia fue del 7% y en el análisis multivariado presentó una asociación significativa con el consumo de mate. Conclusiones: Las lesiones orales se presentan de manera prevalente en los adultos mayores en el Uruguay, lo que sugiere que se deberían implementar programas de prevención, diagnóstico y tratamiento adecuado de las mismas

  10. [A woman with iris heterochromia].

    Science.gov (United States)

    Birker, I L; Boons, L S T M; Luyten, G P M

    2016-01-01

    A 20-year-old woman with congenital iris heterochromia presented with loss of vision of her right eye. We made de diagnosis of a large 'uvea melanoma' and enucleated the eye. Pathological examination showed an underlying oculodermal melanocytosis (ODM). The life-time risk of uveal melanoma in the general population is 0.7:100,000, but 1:400 in patients with ODM. Therefore, annual fundoscopy is recommended in these patients.

  11. CDIS: Circle Density Based Iris Segmentation

    Science.gov (United States)

    Gupta, Anand; Kumari, Anita; Kundu, Boris; Agarwal, Isha

    Biometrics is an automated approach of measuring and analysing physical and behavioural characteristics for identity verification. The stability of the Iris texture makes it a robust biometric tool for security and authentication purposes. Reliable Segmentation of Iris is a necessary precondition as an error at this stage will propagate into later stages and requires proper segmentation of non-ideal images having noises like eyelashes, etc. Iris Segmentation work has been done earlier but we feel it lacks in detecting iris in low contrast images, removal of specular reflections, eyelids and eyelashes. Hence, it motivates us to enhance the said parameters. Thus, we advocate a new approach CDIS for Iris segmentation along with new algorithms for removal of eyelashes, eyelids and specular reflections and pupil segmentation. The results obtained have been presented using GAR vs. FAR graphs at the end and have been compared with prior works related to segmentation of iris.

  12. Video-based noncooperative iris image segmentation.

    Science.gov (United States)

    Du, Yingzi; Arslanturk, Emrah; Zhou, Zhi; Belcher, Craig

    2011-02-01

    In this paper, we propose a video-based noncooperative iris image segmentation scheme that incorporates a quality filter to quickly eliminate images without an eye, employs a coarse-to-fine segmentation scheme to improve the overall efficiency, uses a direct least squares fitting of ellipses method to model the deformed pupil and limbic boundaries, and develops a window gradient-based method to remove noise in the iris region. A remote iris acquisition system is set up to collect noncooperative iris video images. An objective method is used to quantitatively evaluate the accuracy of the segmentation results. The experimental results demonstrate the effectiveness of this method. The proposed method would make noncooperative iris recognition or iris surveillance possible.

  13. Biometric Authentication System based on Iris Patterns

    Directory of Open Access Journals (Sweden)

    G. Sathish

    2012-01-01

    Full Text Available In the present age of digital impersonation, biometrictechniques are being used increasingly to prevaricateagainst identity thefts. Iris recognition is a proven,accurate means to identify people. Iris is regarded as themost reliable biometric feature in terms of its uniquenessand robustness. The objective of this work is to present abiometric authentication system for high securityphysical access control based on iris pattern. Theproposed iris recognition with improvement in segmentation and matching stages using Hamming distance provides match for iris pattern if hamming distance is below 0.15. The CASIA IRIS image database of Chinese Academy of Sciences Institute of Automation is used and the system is implemented in MATLAB. The proposed approach found to report higher verification accuracy of 99.2%.

  14. Iris segmentation using variational level set method

    Science.gov (United States)

    Roy, Kaushik; Bhattacharya, Prabir; Suen, Ching Y.

    2011-04-01

    Continuous efforts have been made to process degraded iris images for enhancement of the iris recognition performance in unconstrained situations. Recently, many researchers have focused on developing the iris segmentation techniques, which can deal with iris images in a non-cooperative environment where the probability of acquiring unideal iris images is very high due to gaze deviation, noise, blurring, and occlusion by eyelashes, eyelids, glasses, and hair. Although there have been many iris segmentation methods, most focus primarily on the accurate detection of iris images captured in a closely controlled environment. The novelty of this research effort is that we propose to apply a variational level set-based curve evolution scheme that uses a significantly larger time step to numerically solve the evolution partial differential equation (PDE) for segmentation of an unideal iris image accurately, and thereby, speeding up the curve evolution process drastically. The iris boundary represented by the variational level set may break and merge naturally during evolution, and thus, the topological changes are handled automatically. The proposed variational model is also robust against poor localization and weak iris/sclera boundaries. In order to solve the size irregularities occurring due to arbitrary shapes of the extracted iris/pupil regions, a simple method is applied based on connection of adjacent contour points. Furthermore, to reduce the noise effect, we apply a pixel-wise adaptive 2D Wiener filter. The verification and identification performance of the proposed scheme is validated on three challenging iris image datasets, namely, the ICE 2005, the WVU Unideal, and the UBIRIS Version 1.

  15. Iris analysis for biometric recognition systems

    CERN Document Server

    Bodade, Rajesh M

    2014-01-01

    The book presents three most significant areas in Biometrics and Pattern Recognition. A step-by-step approach for design and implementation of Dual Tree Complex Wavelet Transform (DTCWT) plus Rotated Complex Wavelet Filters (RCWF) is discussed in detail. In addition to the above, the book provides detailed analysis of iris images and two methods of iris segmentation. It also discusses simplified study of some subspace-based methods and distance measures for iris recognition backed by empirical studies and statistical success verifications.

  16. Predisposición a sufrir lesiones no intencionadas en la infancia: el papel del temperamento infantil y el estilo educativo paterno

    OpenAIRE

    Valero Gómez, María Amparo

    2016-01-01

    A partir del primer año de edad y durante los primeros años de vida, las lesiones no intencionadas son un problema importante de salud, que se encuentran entre las primeras causas de muerte en todos los países. La mayoría de estudios analizan los factores epidemiológicos más relevantes de aquellos accidentes que han llegado a los servicios sanitarios. Sin embargo, no se ha prestado la suficiente atención a los accidentes que no tienen consecuencias graves, ni a las características personales ...

  17. Iris Recognition: The Consequences of Image Compression

    Directory of Open Access Journals (Sweden)

    Bishop DanielA

    2010-01-01

    Full Text Available Iris recognition for human identification is one of the most accurate biometrics, and its employment is expanding globally. The use of portable iris systems, particularly in law enforcement applications, is growing. In many of these applications, the portable device may be required to transmit an iris image or template over a narrow-bandwidth communication channel. Typically, a full resolution image (e.g., VGA is desired to ensure sufficient pixels across the iris to be confident of accurate recognition results. To minimize the time to transmit a large amount of data over a narrow-bandwidth communication channel, image compression can be used to reduce the file size of the iris image. In other applications, such as the Registered Traveler program, an entire iris image is stored on a smart card, but only 4 kB is allowed for the iris image. For this type of application, image compression is also the solution. This paper investigates the effects of image compression on recognition system performance using a commercial version of the Daugman iris2pi algorithm along with JPEG-2000 compression, and links these to image quality. Using the ICE 2005 iris database, we find that even in the face of significant compression, recognition performance is minimally affected.

  18. Iris Recognition: The Consequences of Image Compression

    Science.gov (United States)

    Ives, Robert W.; Bishop, Daniel A.; Du, Yingzi; Belcher, Craig

    2010-12-01

    Iris recognition for human identification is one of the most accurate biometrics, and its employment is expanding globally. The use of portable iris systems, particularly in law enforcement applications, is growing. In many of these applications, the portable device may be required to transmit an iris image or template over a narrow-bandwidth communication channel. Typically, a full resolution image (e.g., VGA) is desired to ensure sufficient pixels across the iris to be confident of accurate recognition results. To minimize the time to transmit a large amount of data over a narrow-bandwidth communication channel, image compression can be used to reduce the file size of the iris image. In other applications, such as the Registered Traveler program, an entire iris image is stored on a smart card, but only 4 kB is allowed for the iris image. For this type of application, image compression is also the solution. This paper investigates the effects of image compression on recognition system performance using a commercial version of the Daugman iris2pi algorithm along with JPEG-2000 compression, and links these to image quality. Using the ICE 2005 iris database, we find that even in the face of significant compression, recognition performance is minimally affected.

  19. Iris Image Quality Assessment for Biometric Application

    Directory of Open Access Journals (Sweden)

    U. M. Chaskar

    2012-05-01

    Full Text Available Image quality assessment plays an important role in the performance of biometric system involving iris images. Data quality assessment is a key issue in order to broaden the applicability of iris biometrics to unconstrained imaging conditions. In this paper, we have proposed the quality factors of individual iris images by assessing their prominent factors by their scores. The work has been carried out for the following databases: CASIA, UBIRIS, UPOL, MMU and our own created COEP Database using HIS 5000 HUVITZ Iris Camera. The comparison is also done with existing databases which in turn will act as a benchmark in increasing the efficiency of further processing.

  20. Exploring the feasibility of iris recognition for visible spectrum iris images obtained using smartphone camera

    Science.gov (United States)

    Trokielewicz, Mateusz; Bartuzi, Ewelina; Michowska, Katarzyna; Andrzejewska, Antonina; Selegrat, Monika

    2015-09-01

    In the age of modern, hyperconnected society that increasingly relies on mobile devices and solutions, implementing a reliable and accurate biometric system employing iris recognition presents new challenges. Typical biometric systems employing iris analysis require expensive and complicated hardware. We therefore explore an alternative way using visible spectrum iris imaging. This paper aims at answering several questions related to applying iris biometrics for images obtained in the visible spectrum using smartphone camera. Can irides be successfully and effortlessly imaged using a smartphone's built-in camera? Can existing iris recognition methods perform well when presented with such images? The main advantage of using near-infrared (NIR) illumination in dedicated iris recognition cameras is good performance almost independent of the iris color and pigmentation. Are the images obtained from smartphone's camera of sufficient quality even for the dark irides? We present experiments incorporating simple image preprocessing to find the best visibility of iris texture, followed by a performance study to assess whether iris recognition methods originally aimed at NIR iris images perform well with visible light images. To our best knowledge this is the first comprehensive analysis of iris recognition performance using a database of high-quality images collected in visible light using the smartphones flashlight together with the application of commercial off-the-shelf (COTS) iris recognition methods.

  1. A paradoxical decline: intracranial lesions in two HIV-positive patients recovering from cryptococcal meningitis.

    Science.gov (United States)

    Pettersen, Kenneth D; Pappas, Peter G; Chin-Hong, Peter; Baxi, Sanjiv M

    2015-10-16

    Cryptococcal immune reconstitution inflammatory syndrome (C-IRIS) is an increasingly important manifestation among patients with HIV/AIDS, especially as the use of antiretroviral therapy (ART) is expanding worldwide. Cryptococcus and associated C-IRIS are common causes of meningitis. While intracranial lesions are common in HIV/AIDS, they are rarely due to cryptococcosis or C-IRIS. We describe two cases of paradoxical C-IRIS associated with the development of intracranial cryptococcomas in HIV/AIDS. Both patients had an initial episode of cryptococcal meningitis treated with antifungal therapy. At the time, they had initiated or modified ART with subsequent evidence of immune reconstitution. Two months later, they developed aseptic meningitis with intracranial lesions. After exhaustive work ups, both patients were diagnosed with paradoxical C-IRIS and biopsy confirmed intracranial cryptococcomas. We review the important clinical, diagnostic and therapeutic features of cryptococcomas associated with C-IRIS in HIV/AIDS.

  2. Comparing Haar-Hilbert and Log-Gabor Based Iris Encoders on Bath Iris Image Database

    CERN Document Server

    Popescu-Bodorin, Nicolaie; 10.1109/SOFA.2010.5565599

    2011-01-01

    This papers introduces a new family of iris encoders which use 2-dimensional Haar Wavelet Transform for noise attenuation, and Hilbert Transform to encode the iris texture. In order to prove the usefulness of the newly proposed iris encoding approach, the recognition results obtained by using these new encoders are compared to those obtained using the classical Log- Gabor iris encoder. Twelve tests involving single/multienrollment and conducted on Bath Iris Image Database are presented here. One of these tests achieves an Equal Error Rate comparable to the lowest value reported so far for this database. New Matlab tools for iris image processing are also released together with this paper: a second version of the Circular Fuzzy Iris Segmentator (CFIS2), a fast Log-Gabor encoder and two Haar-Hilbert based encoders.

  3. Feature Vector Construction Method for IRIS Recognition

    Science.gov (United States)

    Odinokikh, G.; Fartukov, A.; Korobkin, M.; Yoo, J.

    2017-05-01

    One of the basic stages of iris recognition pipeline is iris feature vector construction procedure. The procedure represents the extraction of iris texture information relevant to its subsequent comparison. Thorough investigation of feature vectors obtained from iris showed that not all the vector elements are equally relevant. There are two characteristics which determine the vector element utility: fragility and discriminability. Conventional iris feature extraction methods consider the concept of fragility as the feature vector instability without respect to the nature of such instability appearance. This work separates sources of the instability into natural and encodinginduced which helps deeply investigate each source of instability independently. According to the separation concept, a novel approach of iris feature vector construction is proposed. The approach consists of two steps: iris feature extraction using Gabor filtering with optimal parameters and quantization with separated preliminary optimized fragility thresholds. The proposed method has been tested on two different datasets of iris images captured under changing environmental conditions. The testing results show that the proposed method surpasses all the methods considered as a prior art by recognition accuracy on both datasets.

  4. Síndrome disejecutivo en pacientes con lesiones cerebrales no frontales. Evidencias empíricas obtenidas con la aplicación del WCST.

    Directory of Open Access Journals (Sweden)

    Hansel Soto Hernández

    2016-01-01

    Full Text Available En la presente investigación el objetivo fue evaluar el impacto que tienen las lesiones tumorales no frontales sobre las funciones ejecutivas. Se analizó el rendimiento en el test de WCST de un grupo experimental de pacientes con tumores cerebrales no frontales (n=30, y se comparó con dos grupos controles. El grupo control (1, conformado por pacientes con lesiones tumorales frontales (n=15, y el grupo control (2, por sujetos normales (n=40. Ambos grupos clínicos pertenecieron al servicio de Neurocirugía del Hospital Hermanos Ameijeiras. Se diagnosticó el síndrome disejecutivo en el 67% de los sujetos con lesiones tumorales no frontales y no se encontraron diferencias significativas entre ambos grupos de pacientes clínicos. Los análisis estadísticos, sugieren que las funciones ejecutivas no son un sistema unitario y modular, sino más bien de procesamiento múltiple. Se recomienda no emplear el WCST en la práctica neuropsicológica como una prueba exclusiva para el diagnóstico de lesión cerebral frontal, sino más bien como un instrumento de evaluación de las funciones ejecutivas.

  5. Lesiones traumáticas y marcas taxonómicas en una muestra de cráneos del norte de Patagonia

    Directory of Open Access Journals (Sweden)

    Gordón, Florencia

    2007-01-01

    Full Text Available Actualmente se está llevando a cabo una investigación orientada a evaluar la frecuencia y el tipo de lesiones traumáticas atribuibles a situaciones de violencia interpersonal en muestras de restos óseos humanos del norte de Patagonia asignables al Holoceno tardío. Para dicho estudio, resulta indispensable un análisis de tipos e intensidad de variables postdepositacionales con el fin de estimar su impacto sobre la visibilidad de las huellas culturales. Sería esperable que en las submuestras que exhiben un grado mayor de alteración postdepositacional el registro de traumas sea menor y viceversa. El tamaño mínimo de la muestra analizada es de 400 cráneos procedentes de las cuencas inferiores de los ríos Negro y Chubut, pertenecientes a las colecciones del Museo de Ciencias Naturales de La Plata. Los resultados obtenidos hasta el presente indican que la muestra de Río Negro es la que mayor frecuencia de traumas y alteraciones tafonómicas presenta, mientras que la de Chubut exhibe baja frecuencia tanto de marcas tafonómicas como de traumas. Las variables postdepositacionales no parecen estar afectando significativamente a las observaciones de traumas culturales, por lo que las diferencias regionales en la frecuencia de este tipo de lesiones parecen reflejar diferencias reales en la exposición a factores causantes de lesiones traumáticas, entre las que se cuenta la violencia interpersonal.

  6. Enhanced iris recognition method based on multi-unit iris images

    Science.gov (United States)

    Shin, Kwang Yong; Kim, Yeong Gon; Park, Kang Ryoung

    2013-04-01

    For the purpose of biometric person identification, iris recognition uses the unique characteristics of the patterns of the iris; that is, the eye region between the pupil and the sclera. When obtaining an iris image, the iris's image is frequently rotated because of the user's head roll toward the left or right shoulder. As the rotation of the iris image leads to circular shifting of the iris features, the accuracy of iris recognition is degraded. To solve this problem, conventional iris recognition methods use shifting of the iris feature codes to perform the matching. However, this increases the computational complexity and level of false acceptance error. To solve these problems, we propose a novel iris recognition method based on multi-unit iris images. Our method is novel in the following five ways compared with previous methods. First, to detect both eyes, we use Adaboost and a rapid eye detector (RED) based on the iris shape feature and integral imaging. Both eyes are detected using RED in the approximate candidate region that consists of the binocular region, which is determined by the Adaboost detector. Second, we classify the detected eyes into the left and right eyes, because the iris patterns in the left and right eyes in the same person are different, and they are therefore considered as different classes. We can improve the accuracy of iris recognition using this pre-classification of the left and right eyes. Third, by measuring the angle of head roll using the two center positions of the left and right pupils, detected by two circular edge detectors, we obtain the information of the iris rotation angle. Fourth, in order to reduce the error and processing time of iris recognition, adaptive bit-shifting based on the measured iris rotation angle is used in feature matching. Fifth, the recognition accuracy is enhanced by the score fusion of the left and right irises. Experimental results on the iris open database of low-resolution images showed that the

  7. Correlation of iris biometrics and DNA

    DEFF Research Database (Denmark)

    Harder, Stine; Clemmensen, Line Katrine Harder; Dahl, Anders Bjorholm

    2013-01-01

    The presented work concerns prediction of complex human phenotypes from genotypes. We were interested in correlating iris color and texture with DNA. Our data consist of 212 eye images along with DNA: 32 single-nucleotide polymorphisms (SNPs). We used two types of biometrics to describe the eye...... images: One for iris color and one for iris texture. Both biometrics were high dimensional and a sparse principle component analysis (SPCA) reduced the dimensions and resulted in a representation of data with good interpretability. The correlations between the sparse principal components (SPCs....... The significant canonical variables for color and texture were primarily explained by the first SPC (SPC1). Therefore, we made a visual inspection of the first SPCs. The color based SPC1 explained a blue to brown variation in iris color and the texture based SPC1 gave a general explanation of iris texture...

  8. Iris Localization Based on Edge Searching Strategies

    Institute of Scientific and Technical Information of China (English)

    Wang Yong; Han Jiuqiang

    2005-01-01

    An iris localization scheme based on edge searching strategies is presented. First, the edge detection operator Laplacian-ofGaussian (LoG) is used to iris original image to search its inner boundary. Then, a circle detection operator is introduced to locate the outer boundary and its center, which is invariant of translation, rotation and scale. Finally, the method of curve fitting is developed in localization of eyelid. The performance of the proposed method is tested with 756 iris images from 108 different classes in CASIA Iris Database and compared with the conventional Hough transform method. The experimental results show that without loss of localization accuracy, the proposed iris localization algorithm is apparently faster than Hough transform.

  9. Deteccion del virus del papiloma humano de alto riesgo por captura hibrida II segun hallazgos citologicos en mujeres tratadas por lesiones escamosas intraepiteliales de cuello uterino, periodo 2006/2010

    OpenAIRE

    Pamela Mongelos; Malvina Paez; Isabel Rodriguez-Riveros; Graciela Gimenez; Amalia Castro; Laura Mendoza

    2013-01-01

    OBJETIVO: Determinar la frecuencia del virus de papiloma humano de alto riesgo oncogénico (HR-HPV) por captura híbrida II (r) (CH II(r)) según hallazgos citológicos en mujeres tratadas por lesiones escamosas intraepiteliales (SIL) de cuello uterino. MATERIAL Y MÉTODO: Estudio descriptivo de corte transverso de una serie de casos, en donde se incluyeron 122 mujeres tratadas, 79 (65%) por SIL de bajo grado (LSIL) y 43 (35%) por SIL de alto grado (HSIL) que concurrier...

  10. An iris segmentation algorithm based on edge orientation for off-angle iris recognition

    Science.gov (United States)

    Karakaya, Mahmut; Barstow, Del; Santos-Villalobos, Hector; Boehnen, Christopher

    2013-03-01

    Iris recognition is known as one of the most accurate and reliable biometrics. However, the accuracy of iris recognition systems depends on the quality of data capture and is negatively affected by several factors such as angle, occlusion, and dilation. In this paper, we present a segmentation algorithm for off-angle iris images that uses edge detection, edge elimination, edge classification, and ellipse fitting techniques. In our approach, we first detect all candidate edges in the iris image by using the canny edge detector; this collection contains edges from the iris and pupil boundaries as well as eyelash, eyelids, iris texture etc. Edge orientation is used to eliminate the edges that cannot be part of the iris or pupil. Then, we classify the remaining edge points into two sets as pupil edges and iris edges. Finally, we randomly generate subsets of iris and pupil edge points, fit ellipses for each subset, select ellipses with similar parameters, and average to form the resultant ellipses. Based on the results from real experiments, the proposed method shows effectiveness in segmentation for off-angle iris images.

  11. An Iris Segmentation Algorithm based on Edge Orientation for Off-angle Iris Recognition

    Energy Technology Data Exchange (ETDEWEB)

    Karakaya, Mahmut [ORNL; Barstow, Del R [ORNL; Santos-Villalobos, Hector J [ORNL; Boehnen, Chris Bensing [ORNL

    2013-01-01

    Iris recognition is known as one of the most accurate and reliable biometrics. However, the accuracy of iris recognition systems depends on the quality of data capture and is negatively affected by several factors such as angle, occlusion, and dilation. In this paper, we present a segmentation algorithm for off-angle iris images that uses edge detection, edge elimination, edge classification, and ellipse fitting techniques. In our approach, we first detect all candidate edges in the iris image by using the canny edge detector; this collection contains edges from the iris and pupil boundaries as well as eyelash, eyelids, iris texture etc. Edge orientation is used to eliminate the edges that cannot be part of the iris or pupil. Then, we classify the remaining edge points into two sets as pupil edges and iris edges. Finally, we randomly generate subsets of iris and pupil edge points, fit ellipses for each subset, select ellipses with similar parameters, and average to form the resultant ellipses. Based on the results from real experiments, the proposed method shows effectiveness in segmentation for off-angle iris images.

  12. Fuzzy difference-of-Gaussian-based iris recognition method for noisy iris images

    Science.gov (United States)

    Kang, Byung Jun; Park, Kang Ryoung; Yoo, Jang-Hee; Moon, Kiyoung

    2010-06-01

    Iris recognition is used for information security with a high confidence level because it shows outstanding recognition accuracy by using human iris patterns with high degrees of freedom. However, iris recognition accuracy can be reduced by noisy iris images with optical and motion blurring. We propose a new iris recognition method based on the fuzzy difference-of-Gaussian (DOG) for noisy iris images. This study is novel in three ways compared to previous works: (1) The proposed method extracts iris feature values using the DOG method, which is robust to local variations of illumination and shows fine texture information, including various frequency components. (2) When determining iris binary codes, image noises that cause the quantization error of the feature values are reduced with the fuzzy membership function. (3) The optimal parameters of the DOG filter and the fuzzy membership function are determined in terms of iris recognition accuracy. Experimental results showed that the performance of the proposed method was better than that of previous methods for noisy iris images.

  13. Cardiac lesions in patients with lethal central nervous system trauma Daño cardíaco en pacientes con trauma mortal del sistema nervioso central

    Directory of Open Access Journals (Sweden)

    María E. Cardona

    1991-03-01

    Full Text Available

    Fifteen men with lethal central nervous system trauma were studied to look for the presence of cardiac lesions. They were between 16 and 60 years of age with an average of 32. There were five gunshot wounds and nine central nervous system contusions; four of these occurred in traffic accidents. The remaining patient was wounded with a machete. AII patients were adequately treated since the beginning of their hospital stay and 14 were surgically managed. Average survival after trauma was 6.6 days. In every case there were ECG alterations, the most frequent being sinusal tachycardia. Creatine phosphokinase levels were high in all and the MB fraction was above normal levels in three patients in whom heart damage was confirmed at autopsy. In 40% of cases heart lesions were found and the most common was subendocardial hemorrhage. In an era of increasing need of organs for transplantation potential donors have to be thoroughly studied to determine if heart lesions have occurred and to decide if they are suitable as transplant organs.

    Analizamos los casos de 15 hombres con trauma mortal del sistema nervioso central. Sus edades fluctuaron entre 16 y 60 años con un promedio de 32. Las lesiones más frecuentes fueron por proyectil de arma de fuego (5 casos y por contusión (9 casos, cuatro de ellos en accidente de tránsito. El paciente restante fue lesionado con arma corto contundente. En todos los pacientes el manejo fue adecuado desde el principio de la hospitalización ya 14 se les hizo tratamiento quirúrgico. El promedio de sobrevida después del trauma fue 6.6 días. Sin excepción el estudio electrocardiográfico mostró alteraciones; la taquicardia sinusal fue la más frecuente. La CPK estuvo elevada en todos los pacientes; en 3 de ellos, con da

  14. Role of Arbuscular Mycorrhizal Fungi on Iris

    Directory of Open Access Journals (Sweden)

    CHEN Yuan

    2014-06-01

    Full Text Available For efficiency using the amphibious plant iris to restore polluted water, the promoting effect of different arbuscular mycorrhiza fungi(AMFon iris was investigated, by monitoring the plant growth index, the physicochemical properties of the soil and the plant photosynthesis indexes. The result showed that the promoting effects of the AMF on the aboveground part and the underground part of the iris were based on different mechanism. For the underground part of the iris, the AMF stimulated its growth through the nutrient enrichment which was performed by the enormous hypha network. The nitrogen absorbing rate of the G. mosseae and the G. intraradices infected iris increased about 71.75% and 42.55%, and the phosphorous absorbing rate increased 8.36% and 9.5% separately. For the aboveground part of the iris, the AMF strengthened the conductance of the leaves’ stomas to control the balance between the net photosynthesis rate and the transpiration rate, so that the utilization rate of water resources was optimized, the metabolic rate was accelerated and the growth of the plant was promoted eventually. In this study, the promoting effect of the G. mosseae on the photosynthesis rate of the iris was significantly better than that of the G. intraradices(P<0.05.

  15. Off-Angle Iris Correction Methods

    Energy Technology Data Exchange (ETDEWEB)

    Santos-Villalobos, Hector J [ORNL; Thompson, Joseph T [ORNL; Karakaya, Mahmut [ORNL; Boehnen, Chris Bensing [ORNL

    2016-01-01

    In many real world iris recognition systems obtaining consistent frontal images is problematic do to inexperienced or uncooperative users, untrained operators, or distracting environments. As a result many collected images are unusable by modern iris matchers. In this chapter we present four methods for correcting off-angle iris images to appear frontal which makes them compatible with existing iris matchers. The methods include an affine correction, a retraced model of the human eye, measured displacements, and a genetic algorithm optimized correction. The affine correction represents a simple way to create an iris image that appears frontal but it does not account for refractive distortions of the cornea. The other method account for refraction. The retraced model simulates the optical properties of the cornea. The other two methods are data driven. The first uses optical flow to measure the displacements of the iris texture when compared to frontal images of the same subject. The second uses a genetic algorithm to learn a mapping that optimizes the Hamming Distance scores between off-angle and frontal images. In this paper we hypothesize that the biological model presented in our earlier work does not adequately account for all variations in eye anatomy and therefore the two data-driven approaches should yield better performance. Results are presented using the commercial VeriEye matcher that show that the genetic algorithm method clearly improves over prior work and makes iris recognition possible up to 50 degrees off-angle.

  16. Detección del ADN de Papilomavirus humano en lesiones precancerosas y cancerosas de cuello uterino por reacción en cadena de la polimerasa, en Bucaramanga, Santander

    Directory of Open Access Journals (Sweden)

    Castillo A.

    2001-06-01

    Full Text Available Determinar la validez de la Reacción en Cadena de la Polimerasa (PCR en el diagnóstico de la infección por el virus del papiloma humano (VPH, detectando diferentes tipos de VPH oncogénicos (16, 18, 31, 33 y 35 y no oncogénicos (6 y 11 en pacientes con lesiones precancerosas y cancerosas de cérvix y en pacientes control, estableciendo la prevalencia del virus en estas lesiones.

  17. The voices of Iris: Cinematic representations of the aged woman and Alzheimer's disease in Iris (2001).

    Science.gov (United States)

    Graham, Megan E

    2016-09-01

    Audiences must be critical of film representations of the aged woman living with Alzheimer's disease and of dangerous reinscriptions of stereotypical equations about ageing as deterioration. This paper analyses the representation and decline of the aged woman through the different voices of Iris Murdoch in Richard Eyre's film Iris (2001). Key vocal scenes are considered: On-screen encounters between young and aged Iris, vocal representations of dementia symptoms and silencing Iris as her disease progresses. Further, Iris' recurrent unaccompanied song, "The Lark in the Clear Air," compels audiences to "see" Iris with their ears more than with their eyes, exemplifying the representational power of sound in film. This paper is an appeal for increased debate about sonic representations of aged women, ageing and Alzheimer's disease and dementia in film. The significance of audiences' critical awareness and understanding about the social implications of these representations is discussed. © The Author(s) 2014.

  18. Hough Transform and Active Contour for Enhanced Iris Segmentation

    Directory of Open Access Journals (Sweden)

    Alaa Hilal

    2012-11-01

    Full Text Available Iris segmentation is considered as the most difficult and fundamental step in an iris recognition system. While iris boundaries are largely approximated by two circles or ellipses, other methods define more accurately the iris resulting in better recognition results. In this paper we propose an iris segmentation method using Hough transform and active contour to detect a circular approximation of the outer iris boundary and to accurately segment the inner boundary in its real shape motivated by the fact that richer iris textures are closer to the pupil than to the sclera. Normalization, encoding and matching are implemented according to Daugmans method. The method, tested on CASIA-V3 iris images database is compared to Daugmans iris recognition system. Recognition performance is measured in terms of decidability, accuracy at the equal error rate and ROC curves. Improved recognition performance is obtained using our segmentation model proposing its use for better iris recognition system.

  19. SEGMENTATION AND QUALITY ANALYSIS OF LONG RANGE CAPTURED IRIS IMAGE

    Directory of Open Access Journals (Sweden)

    Anand Deshpande

    2016-05-01

    Full Text Available The iris segmentation plays a major role in an iris recognition system to increase the performance of the system. This paper proposes a novel method for segmentation of iris images to extract the iris part of long range captured eye image and an approach to select best iris frame from the iris polar image sequences by analyzing the quality of iris polar images. The quality of iris image is determined by the frequency components present in the iris polar images. The experiments are carried out on CASIA-long range captured iris image sequences. The proposed segmentation method is compared with Hough transform based segmentation and it has been determined that the proposed method gives higher accuracy for segmentation than Hough transform.

  20. Solitary Sarcoid Granuloma of the Iris Mimicking Tuberculosis: A Case Report

    Directory of Open Access Journals (Sweden)

    Robert Rejdak

    2014-01-01

    Full Text Available Introduction. We report a case of a male patient presented with sarcoid lesions of the iris and conjunctiva, mimicking tuberculosis due to epithelioid cell granulomas with small central necrosis in conjunctival biopsy. Patient. A 25-year-old man was referred to our department for further management of an “iris tumor with iridocyclitis” in his right eye. Initial examination showed an isolated vascular tumor of the iris and ciliary body with anterior uveitis and mutton-fat keratic precipitates, suggesting the diagnosis of a granulomatous disease. Conjunctival biopsy revealed granulomatous epithelioid cell inflammation with small central necrosis without acid-fast bacilli. Extensive systemic examination, including bronchoscopy and transbronchial biopsy, provided the diagnosis of sarcoidosis stage 2 with pulmonary involvement, thus ruling out tuberculosis. Systemic and local steroid therapy was initiated, leading to complete recovery of our patient with complete disappearance of the iris lesion and improvement of the pulmonary function. Conclusion. Although noncaseating epithelioid cell granulomas are typical for sarcoidosis, small central necrosis can be found in some granulomas, leading to presumption of tuberculosis. Extensive systemic checkup in cooperation with other specialists is essential to confirm the correct diagnosis and to initiate the appropriate therapy.

  1. A novel iris localization algorithm using correlation filtering

    Science.gov (United States)

    Pohit, Mausumi; Sharma, Jitu

    2015-06-01

    Fast and efficient segmentation of iris from the eye images is a primary requirement for robust database independent iris recognition. In this paper we have presented a new algorithm for computing the inner and outer boundaries of the iris and locating the pupil centre. Pupil-iris boundary computation is based on correlation filtering approach, whereas iris-sclera boundary is determined through one dimensional intensity mapping. The proposed approach is computationally less extensive when compared with the existing algorithms like Hough transform.

  2. Using multi-matching system based on a simplified deformable model of the human iris for iris recognition

    Institute of Scientific and Technical Information of China (English)

    MING Xing; XU Tao; WANG Zheng-xuan

    2004-01-01

    A new method for iris recognition using a multi-matching system based on a simplified deformable model of the human iris was proposed. The method defined iris feature points and formed the feature space based on a wavelet transform. In the matching stage it worked in a crude manner. Driven by a simplified deformable iris model, the crude matching was refined. By means of such multi-matching system, the task of iris recognition was accomplished. This process can preserve the elastic deformation between an input iris image and a template and improve precision for iris recognition. The experimental results indicate the validity of this method.

  3. FRECUENCIA DE LESIONES MACROSCÓPICAS EN PULMONES DE BOVINOS TIPO EXPORTACIÓN FAENADOS EN EL FRIGORÍFICO DEL MUNICIPIO DE MONTERÍA, COLOMBIA

    Directory of Open Access Journals (Sweden)

    T. Oviedo-Socarrás

    2016-01-01

    Full Text Available Se examinaron los pulmones de 582 bovinos machos tipo exportación, de razas cebuínas y diferentes procedencias, faenados en el frigorífico Frigosinú del municipio de Montería (Córdoba, Colombia, con la finalidad de identificar las lesiones encontradas en este órgano. El muestreo se hizo en forma sistemática durante 10 días, evaluando animales escogidos al azar. Durante el tiempo de estudio se decomisaron los pulmones de 190 animales (32,6% con algún tipo de alteración pulmonar mientras el 67,4% no presentó lesiones macroscópicas evidentes. Estos resultados se analizaron mediante estadística descriptiva, encontrándose que el enfisema intersticial fue la causa principal de decomiso en 64,7% de los animales, seguido de hemorragias (15,8%, neumonía lobar (10,5%, congestión pulmonar (8,9% y broncoaspiración de contenido ruminal (9,0%; sin embargo, el diagnóstico histopatológico no fue contemplado en este estudio y, por lo tanto, el diagnóstico presuntivo se estableció según las lesiones macroscópicas. Se concluyó que la mayoría de las alteraciones encontradas en los pulmones decomisados obedece a fallas en el proceso de insensibilización y sacrificio de los animales, aunque no se pueden descartar problemas infecciosos.

  4. EFFICIENT IRIS SEGMENTATION BASED ON EYELID DETECTION

    Directory of Open Access Journals (Sweden)

    ABDULJALIL RADMAN

    2013-08-01

    Full Text Available This paper proposes a computationally efficient eyelid detection algorithm for detecting eyelid boundaries in iris images acquired under less constrained imaging conditions. The proposed eyelid detection algorithm is developed based on the live-wire technique. The major advantage of the proposed algorithm is its computational simplicity as compared to the prior eyelid detection algorithms. The saturation color features of the sclera region of the HSI color space of the iris image are exploited to determine the two intersection points between each eyelid and the outer iris boundary. The strongly connected edges between these two points are detected using the live wire technique that is likely to be the eyelid boundary. The experimental results obtained from UBIRIS.v1 database reveal that the eyelid detection algorithm which proposed in this paper improves the segmentation accuracy for the less constrained iris images.

  5. Internet Renewable energy Information System (IRIS)

    DEFF Research Database (Denmark)

    Bäurle, Britta; Nielsen, Vilhjalmur; Ménard, Lionel

    1999-01-01

    Even though the Internet is now a widely accessible data source, the unorganised flood of information makes a specific request e.g. for renewable energy products inefficient. In addition, existing databases on renewable energies are often old and incomplete. The objective of IRIS has been...... to organise and retrieve renewable energy product information on the Internet instead of collecting it manually. Updating coincides with the self interestself-interest of manufacturers to present their latest renewable energy products on their own HTML documents. IRIS is based on a set of powerful tools...... on biogas systems in order to become part of IRIS. IRIS has been developed in the context of the project „AVALANCHE" which is partly funded under the JOULE programme of the European Commission DGXII.Keywords: Renewable Energy Technologies - Electronic Commerce - Information System - META-tags...

  6. Implementación de medidas ergonómicas para prevención y control de lesiones músculo esqueléticas en el personal administrativo del Colegio Alemán

    OpenAIRE

    Sémper Chávez, Johana Valeria

    2016-01-01

    El objetivo del presente estudio fue la implementación de medidas ergonómicas, a fin de reducir las lesiones musculo esqueléticas en el personal administrativo. El estudio se realizó a través de la aplicación del cuestionario de Kourinka y el método RULA al personal administrativo del colegio Alemán, determinándose que el 71 % de los trabajadores presentaron sintomatología musculo esquelética en los últimos tres meses, principalmente cervicalgias, lumbalgias, dorsalgias y dolor en hombros y m...

  7. Asociación entre la presencia de anticuerpos anti-Ras y anti-VPH16 E4/E7 y lesiones intraepiteliales del cérvix

    OpenAIRE

    Vázquez-Corzo Sara; Trejo-Becerril Catalina; Cruz-Valdez Aurelio; Hernández-Nevarez Pilar; Esquivel-Guadarrama Fernando Roger; Gutiérrez-Xicotencatl Ma de Lourdes

    2003-01-01

    Objetivo. Determinar si anticuerpos séricos contra E4, E7 y Ras pueden ser utilizados como marcadores de lesiones tempranas del cérvix uterino asociadas al virus del papiloma humano. Material y métodos. Entre marzo de 1999 y abril de 2000 se realizó un estudio sero-epidemiológico de casos y controles en la clínica de displasias del Hospital General Doctor Gea González, en la Ciudad de México, en 116 muestras de suero para evaluar la presencia de anticuerpos anti-E4, E7 y Ras utilizando un ELI...

  8. [Iris movement mediates pupillary membrane regression].

    Science.gov (United States)

    Morizane, Yuki

    2007-11-01

    In the course of mammalian lens development, a transient capillary meshwork called as the pupillary membrane (PM) forms. It is located in the pupil area to nourish the anterior surface of the lens, and then regresses to clear the optical path. Although the involvement of the apoptotic process has been reported in PM regression, the initiating factor remains unknown. We initially found that regression of the PM coincided with the development of iris motility, and that iris movement caused cessation and resumption of blood flow within the PM. Therefore, we investigated whether the development of the capacity of the iris to constrict and dilate can function as an essential signal that induces apoptosis in the PM. Continuous inhibition of iris movement with mydriatic agents suppressed apoptosis of the PM and resulted in the persistence of PM in rats. The distribution of apoptotic cells in the regressing PM was diffuse and showed no apparent localization. These results indicated that iris movement induced regression of the PM by changing the blood flow within it. This study suggests the importance of the physiological interactions between tissues-in this case, the iris and the PM-as a signal to advance vascular regression during organ development.

  9. Deteksi Iris Berdasarkan Metode Black Hole dan Circle Curve Fitting

    Directory of Open Access Journals (Sweden)

    Danny Kurnianto

    2013-11-01

    Full Text Available Sistem pengenalan identitas personal berdasarkan ciri biometrika adalah suatu sistem pengenalan seseorang berdasarkan pada ciri biometrika yang melekat pada orang tersebut. Iris mata merupakan salah satu ciri biometrik yang handal untuk sistem pengenalan identitas personal. Bagian sistem pengenalan identitas personal berdasarkan biometrik iris yang dianggap paling krusial adalah deteksi lokasi iris, karena akurasi deteksi iris berpengaruh pada tingkat akurasi sistem secara keseluruhan. Lokasi iris pada citra mata dibatasi oleh dua buah lingkaran yang memisahkan antara bagian iris  dengan pupil dan sklera. Telah banyak metodemetode yang diusulkan oleh para peneliti untuk menghasilkan deteksi lokasi iris dengan akurat dan cepat. Masalah akurasi, kecepatan waktu eksekusi dan ketahanan terhadap noise merupakan bidang penelitian yang menantang pada deteksi iris. Makalah ini menyajikan metode deteksi iris menggunakan metode black hole dan circle curve fitting. Langkah pertama, mencari batas dalam lingkaran iris yang memisahkan antara daerah iris dan pupil. Dengan metode black hole yang bekerja berdasarkan fakta bahwa lokasi pupil merupakan daerah  lingkaran yang paling hitam dan memiliki distribusi nilai intensitas yang seragam, maka lokasi pupil dapat ditentukan dengan teknik pengambangan. Batas lingkaran pupil dapat ditentukan dengan circle curve fitting dari parameter lingkaran daerah pupil. Langkah kedua,  mencari batas luar lingkaran iris yang memisahkan antara iris dan sklera. Peta tepi citra iris dicari dengan menggunakan deteksi tepi Canny, kemudian diambil satu komponen tepi arah vertikal yang dapat mewakili batas lingkaran luar iris. Dari komponen tepi tersebut, dihitung jari-jari iris yang berpusat di pusat pupil. Dengan jari-jari iris dan pusat iris maka dapat ditentukan batas luar iris menggunakan circle curve fitting

  10. Factores de riesgo en lesiones intraepiteliales de cuello uterino en las usuarias del Hospital Central de la Policía Nacional, año 2009 al 2010

    Directory of Open Access Journals (Sweden)

    Edith Miyeri Segura Valdés

    2012-01-01

    Full Text Available Explorar las características sociodemográficas y factores de riesgo en lesiones intraepiteliales de cuello uterino en las usuarias del Hospital Central de la Policía Nacional, año 2009 al 2010

  11. Detección del virus del papiloma humano en lesiones precancerosas y cancerosas de la mucosa bucal : Evaluación de diferentes métodos, diagnósticos y de técnicas de obtencion del material. Asociación de los resultados con otros factores carcinogénicos

    OpenAIRE

    Benitez, Mónica Beatriz

    2014-01-01

    Antecedentes: Varios estudios epidemiológicos han demostrado una amplia variación en el predominio del HPV en lesiones precancerosas y cancerosas bucales. Métodos: Las biopsias y las citologías por raspado de lesiones bucales premalignas y malignas, fueron evaluadas para detectar el DNA de HPV por el análisis PCR- Southern-Blot. Resultados: En 22 pacientes estudiados el 45,45 por ciento de las biopsias resultaron positivos para la detección de DNA-HPV, mientras que el 95-100 por ciento de las...

  12. Performance of Personal Identification System Technique Using Iris Biometrics Technology

    Directory of Open Access Journals (Sweden)

    V.K. Narendira Kumar

    2013-04-01

    Full Text Available The Iris identification as one of the significant techniques of biometric identification systems s and iris recognition algorithm is described. Biometric technology advances intellectual properties are wanted by many unauthorized personnel. As a result many researchers have being searching ways for more secure authentication methods for the user access. Iris recognition uses iris patterns for personnel identification. The system steps are capturing iris patterns; determining the location of iris boundaries; converting the iris boundary to the stretched polar coordinate system; extracting iris code based on texture analysis. The system has been implemented and tested using dataset of number of samples of iris data with different contrast quality. The developed algorithm performs satisfactorily on the images, provides 93% accuracy. Experimental results show that the proposed method has an encouraging performance.

  13. Utilidad en la combinación de oligonucleótidos universales para la detección del virus del papiloma humano en cáncer cervicouterino y lesiones premalignas Usefulness of combining universal oligonucleotides in detecting human papillomavirus in cervical cancer and premalignant lesions

    Directory of Open Access Journals (Sweden)

    Adela Carrillo

    2004-02-01

    Full Text Available OBJETIVO: Determinar la frecuencia y distribución del virus del papiloma humano en los diferentes estadios que conforman la historia natural del cáncer cérvico uterino, y optimizar la detección mediante el uso de diferentes oligonucleótidos universales. MATERIAL Y MÉTODOS: Se trata de un estudio transversal, descriptivo, en el que las muestras fueron colectadas durante enero a diciembre de 1999. El procesamiento de las muestras y el análisis de los datos se realizaron en el Instituto Nacional de Cancerología en la Ciudad de México. Se hizo análisis comparativo con t de Student para valores continuos y con ji cuadrada para proporciones, y análisis de concordancia entre biopsia y exudado cervical con la prueba estadística de Kappa. Para la detección del virus se utilizó la técnica de la reacción en cadena de la polimerasa (PCR con oligonucleótidos universales los cuales reconocen diferentes regiones del gen L1 (MY09/11; GP5/6; L1C1/2, y oligonucleótidos específicos para el VPH 16 y el VPH 18, así como secuenciación directa de los productos de la PCR. RESULTADOS: Se analizaron 154 muestras: 65 (42.2% citologías normales, 45 (29.2% lesiones de alto y bajo grado, y 44 (28.6% de cáncer invasor. El VPH fue detectado en 95.5% de los casos de cáncer invasor, en 91.6% de lesiones de alto grado, en 66.7% de lesiones de bajo grado y en 23.1% de citologías normales, por la PCR con al menos uno de los juegos de oligonucleótidos utilizados. La detección fue más eficiente en las muestras obtenidas por biopsia que en los exudados cervicovaginales. El porcentaje total de detección del VPH con un juego de oligonucleótidos universales (37.6% aumentó sustancialmente (60.4% al combinarlo con otros dos juegos de oligonucleótidos universales. CONCLUSIONES: La presencia del VPH de alto riesgo es elevada inclusive en mujeres con epitelios cervicales con diagnóstico citológico normal. La detección del VPH mejora al utilizar distintos

  14. New Iris Localization Method Based on Chaos Genetic Algorithm

    Institute of Scientific and Technical Information of China (English)

    Jia Dongli; Muhammad Khurram Khan; Zhang Jiashu

    2005-01-01

    This paper present a new method based on Chaos Genetic Algorithm (CGA) to localize the human iris in a given image. First, the iris image is preprocessed to estimate the range of the iris localization, and then CGA is used to extract the boundary of the iris. Simulation results show that the proposed algorithms is efficient and robust, and can achieve sub pixel precision. Because Genetic Algorithms (GAs) can search in a large space, the algorithm does not need accurate estimation of iris center for subsequent localization, and hence can lower the requirement for original iris image processing. On this point, the present localization algirithm is superior to Daugmans algorithm.

  15. Histopathology in the iris-nevus (Cogan-Reese) syndrome.

    Science.gov (United States)

    Radius, R L; Herschler, J

    1980-06-01

    A 23-year-old-woman had iris-nevus (Cogan-Reese) syndrome characterized by unilateral glaucoma with peripheral anterior synechiae, multiple iris nodules, and ectopic Descemet's membrane. A surgical specimen excised from the involved eye was examined by light and electron microscopy. A cuticular membrane covered both the anterior and posterior surfaces of the iris in this specimen. On the anterior surface of the iris, many projections of apparently normal iris stroma pierced or were surrounded by this membrane. On the posterior surface of the iris, this membrane was associated with a monolayer of cuboidal cells.

  16. Internetwork chromospheric bright grains observed with IRIS

    CERN Document Server

    Martínez-Sykora, Juan; Carlsson, Mats; De Pontieu, Bart; Pereira, Tiago M D; Boerner, Paul; Hurlburt, Neal; Kleint, Lucia; Lemen, James; Tarbell, Ted D; Title, Alan; Wuelser, Jean-Pierre; Hansteen, Viggo H; Golub, Leon; McKillop, Sean; Reeves, Kathy K; Saar, Steven; Testa, Paola; Tian, Hui; Jaeggli, Sarah; Kankelborg, Charles

    2015-01-01

    The Interface Region Imaging Spectrograph (IRIS) reveals small-scale rapid brightenings in the form of bright grains all over coronal holes and the quiet sun. These bright grains are seen with the IRIS 1330 \\AA, 1400 \\AA\\ and 2796 \\AA\\ slit-jaw filters. We combine coordinated observations with IRIS and from the ground with the Swedish 1-m Solar Telescope (SST) which allows us to have chromospheric (Ca II 8542 \\AA, Ca II H 3968 \\AA, H\\alpha, and Mg II k 2796 \\AA), and transition region (C II 1334 \\AA, Si IV 1402) spectral imaging, and single-wavelength Stokes maps in Fe I 6302 \\AA at high spatial (0.33"), temporal and spectral resolution. We conclude that the IRIS slit-jaw grains are the counterpart of so-called acoustic grains, i.e., resulting from chromospheric acoustic waves in a non-magnetic environment. We compare slit-jaw images with spectra from the IRIS spectrograph. We conclude that the grain intensity in the 2796 \\AA\\ slit-jaw filter comes from both the Mg II k core and wings. The signal in the C II ...

  17. ORNL Biometric Eye Model for Iris Recognition

    Energy Technology Data Exchange (ETDEWEB)

    Santos-Villalobos, Hector J [ORNL; Barstow, Del R [ORNL; Karakaya, Mahmut [ORNL; Chaum, Edward [University of Tennessee, Knoxville (UTK); Boehnen, Chris Bensing [ORNL

    2012-01-01

    Iris recognition has been proven to be an accurate and reliable biometric. However, the recognition of non-ideal iris images such as off angle images is still an unsolved problem. We propose a new biometric targeted eye model and a method to reconstruct the off-axis eye to its frontal view allowing for recognition using existing methods and algorithms. This allows for existing enterprise level algorithms and approaches to be largely unmodified by using our work as a pre-processor to improve performance. In addition, we describe the `Limbus effect' and its importance for an accurate segmentation of off-axis irides. Our method uses an anatomically accurate human eye model and ray-tracing techniques to compute a transformation function, which reconstructs the iris to its frontal, non-refracted state. Then, the same eye model is used to render a frontal view of the reconstructed iris. The proposed method is fully described and results from synthetic data are shown to establish an upper limit on performance improvement and establish the importance of the proposed approach over traditional linear elliptical unwrapping methods. Our results with synthetic data demonstrate the ability to perform an accurate iris recognition with an image taken as much as 70 degrees off-axis.

  18. Statistical feature extraction based iris recognition system

    Indian Academy of Sciences (India)

    ATUL BANSAL; RAVINDER AGARWAL; R K SHARMA

    2016-05-01

    Iris recognition systems have been proposed by numerous researchers using different feature extraction techniques for accurate and reliable biometric authentication. In this paper, a statistical feature extraction technique based on correlation between adjacent pixels has been proposed and implemented. Hamming distance based metric has been used for matching. Performance of the proposed iris recognition system (IRS) has been measured by recording false acceptance rate (FAR) and false rejection rate (FRR) at differentthresholds in the distance metric. System performance has been evaluated by computing statistical features along two directions, namely, radial direction of circular iris region and angular direction extending from pupil tosclera. Experiments have also been conducted to study the effect of number of statistical parameters on FAR and FRR. Results obtained from the experiments based on different set of statistical features of iris images show thatthere is a significant improvement in equal error rate (EER) when number of statistical parameters for feature extraction is increased from three to six. Further, it has also been found that increasing radial/angular resolution,with normalization in place, improves EER for proposed iris recognition system

  19. Deteccion del virus del papiloma humano de alto riesgo por captura hibrida II segun hallazgos citologicos en mujeres tratadas por lesiones escamosas intraepiteliales de cuello uterino, periodo 2006/2010

    Directory of Open Access Journals (Sweden)

    Pamela Mongelos

    2013-03-01

    Full Text Available OBJETIVO: Determinar la frecuencia del virus de papiloma humano de alto riesgo oncogénico (HR-HPV por captura híbrida II (r (CH II(r según hallazgos citológicos en mujeres tratadas por lesiones escamosas intraepiteliales (SIL de cuello uterino. MATERIAL Y MÉTODO: Estudio descriptivo de corte transverso de una serie de casos, en donde se incluyeron 122 mujeres tratadas, 79 (65% por SIL de bajo grado (LSIL y 43 (35% por SIL de alto grado (HSIL que concurrieron al Laboratorio de HPV del Instituto de Investigaciones en Ciencias de la Salud, Universidad Nacional de Asunción, para realizarse un control post-tratamiento, periodo 2006/2010. RESULTADOS: Se observó un total del 28% (34/122 de mujeres tratadas por SIL positivas para HR-HPV, detectándose infección viral en un 20% de las mujeres con ausencia de SIL (NSIL (22/108, 83% de las mujeres con LSIL (10/12 y 100% de las mujeres con HSIL (2/2. De las 34 mujeres positivas para HR-HPV, 10 mujeres (29% presentaron valores altos (100 pg/mL o más de carga viral relativa, detectándose un aumento de casos positivos con la severidad de la lesión (28% NSIL, 30% LSIL, 50% HSIL. CONCLUSION: La detección de HR-HPV por CH II(r, así como los valores de carga viral relativa altos, en especial en mujeres con NSIL podrían ayudar a identificar mujeres tratadas con riesgo a desarrollar recidivas, contribuyendo así a fortalecer el programa de prevención de cáncer de cuello uterino.

  20. Aproximación a un estudio sobre las lesiones del bahareque en el estado Zulia, Venezuela. Algunas recomendaciones para su intervención

    Directory of Open Access Journals (Sweden)

    Henneberg de León, A.

    2012-03-01

    Full Text Available The bahareque is a constructive technique made by four components of different materials: wood colums, canning, illing and mud-cover. These components suffer different damages, therefore when repairing these walls different solutions are required for each component. This article presents the first results of a field research, that studied the more frequent damages that undergo these components, and it proposes some recommendations for its repair, based on rehabilitations done in the Zulia State and in the construction of a baharequewall. It was possible to establish that the greater amount of damages was physical and mechanical and they occurred in the mud-cover, component exposed to the environment. The other components only deteriorate when they are uncovered. This study try to offer a source for future researches about the pathology of the bahareque; besides, it can contribute to revalue this technique, being even considered as a technical option for the construction of houses.

    El bahareque es una técnica constructiva formada por cuatro componentes hechos de materiales diversos: horconadura, enlatado, relleno y empanetado. Estos componentes sufren diferentes lesiones, por lo que para su intervención son requeridas distintas soluciones para cada uno. Este artículo presenta los primeros resultados de una investigación de campo que estudió las lesiones más frecuentes que sufren dichos componentes, al igual que propone recomendaciones para su intervención, basadas en rehabilitaciones hechas en el Estado Zulia y en la construcción de una pared de bahareque. Se pudo determinar que la mayor cantidad de lesiones son físicas y mecánicas y se producen en el empanetado, componente expuesto al ambiente. Los otros componentes, se lesionan solo cuando quedan al descubierto. Este estudio intenta servir de base para futuros estudios sobre la patología del bahareque; además, de contribuir a la revalorización de esta técnica, pudiendo ser

  1. A fourier transform quality measure for iris images

    CSIR Research Space (South Africa)

    Makinana, S

    2014-08-01

    Full Text Available Iris recognition systems have attracted much attention for their uniqueness, stability and reliability. However, performance of this system depends on quality of acquired iris sample. This is because in order to obtain reliable features good quality...

  2. Iris recognition: a biometric method after refractive surgery

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Iris recognition, as a biometric method, outperforms others because of its high accuracy. Iris is the visible internal organ of human, so it is stable and very difficult to be altered. But if an eye surgery must be made to some individuals, it may be rejected by iris recognition system as imposters after the surgery, because the iris pattern was altered or damaged somewhat during surgery and cannot match the iris template stored before the surgery. In this paper, we originally discuss whether refractive surgery for vision correction (LASIK surgery) would influence the performance of iris recognition. And experiments are designed and tested on iris images captured especially for this research from patients before and after refractive surgery. Experiments showed that refractive surgery has little influence on iris recognition.

  3. An image segmentation based method for iris feature extraction

    Institute of Scientific and Technical Information of China (English)

    XU Guang-zhu; ZHANG Zai-feng; MA Yi-de

    2008-01-01

    In this article, the local anomalistic blocks such ascrypts, furrows, and so on in the iris are initially used directly asiris features. A novel image segmentation method based onintersecting cortical model (ICM) neural network was introducedto segment these anomalistic blocks. First, the normalized irisimage was put into ICM neural network after enhancement.Second, the iris features were segmented out perfectly and wereoutput in binary image type by the ICM neural network. Finally,the fourth output pulse image produced by ICM neural networkwas chosen as the iris code for the convenience of real timeprocessing. To estimate the performance of the presentedmethod, an iris recognition platform was produced and theHamming Distance between two iris codes was computed tomeasure the dissimilarity between them. The experimentalresults in CASIA vl.0 and Bath iris image databases show thatthe proposed iris feature extraction algorithm has promisingpotential in iris recognition.

  4. Comparison of features response in texture-based iris segmentation

    CSIR Research Space (South Africa)

    Bachoo, A

    2009-03-01

    Full Text Available the Fisher linear discriminant and the iris region of interest is extracted. Four texture description methods are compared for segmenting iris texture using a region based pattern classification approach: Grey Level Co-occurrence Matrix (GLCM), Discrete...

  5. Bilateral acute iris transillumination: Case report

    Directory of Open Access Journals (Sweden)

    Cumali Degirmenci

    2016-04-01

    Full Text Available Bilateral acute iris transillumination (BAIT is a recently defined disease characterized with bilateral acute, severe pigment dispersion of iris and pupil sphincter paralysis. The etiopathogenesis of the disease is unknown, but antibiotics such as moxifloxacin, clarithromycin, viral infections, and fumigation therapies were considered as probable etiologic factors. A 33-year-old female was referred to our clinic for acute iridocyclitis refractory to azathioprine, colchicum and corticosteroid treatments. Ophthalmic examination revealed bilateral pigment dispersion, significant iris transillumination, heavy pigment deposition in iridocorneal angle, and elevated intraocular pressure. Upon systemic evaluation she was found to have bacterial urinary tract infection. BAIT is an important cause of pigment dispersion and clinicians must be vigilant for this condition to avoid unnecessary diagnostic tests and treatment.

  6. [Iris heterochromia in acquired Horner's syndrome].

    Science.gov (United States)

    Beynat, J; Soichot, P; Bidot, S; Dugas, B; Creuzot-Garcher, C; Bron, A

    2007-09-01

    Horner's syndrome (HS) is related to an interruption of the oculosympathetic nerve pathway. The classic clinical findings associated with this condition are ptosis, miosis, and enophthalmos. Heterochromia is typically described in congenital HS, but it is an uncommon finding in acquired HS. We report a case of post-traumatic HS associated with heterochromia. A literature review indicates that this type of heterochromia may be related to a reduction in the number of iris melanocytes. This mechanism may be the same in the physiological iris color modifications in adulthood.

  7. Versatilidad del colgajo en hacha para reconstrucción de lesiones en punta de dedo Versatility of the hatchet flap for reconstruction of fingertip injuries

    Directory of Open Access Journals (Sweden)

    A. Fernández García

    2008-09-01

    Full Text Available El colgajo en hacha descrito por Emmet, ha sido recientemente aplicado por Tuncali et al. en amputaciones de punta de dedo. Este sencillo colgajo triangular puede ser utilizado tanto en amputaciones transversas como oblicuas. El objetivo del estudio es presentar nuestra experiencia con este versátil colgajo en la reconstrucción de punta de dedo. Incluimos en el estudio 5 pacientes que completaron un periodo de seguimiento de un año. El nivel de amputación fue considerado de acuerdo con la clasificación de Ishikawa. Los pacientes fueron preguntados por la existencia de intolerancia al frío, hipersensibilidad y dolor. Empleamos diferentes diseños del colgajo en hacha que se aplicaron en pacientes pediátricos y adultos con amputaciones múltiples, lesiones del primer dedo del pie o de la mano, de dedos largos y en reconstrucciones con doble colgajo. La media de tamaño del defecto fue 2,2 x 1,4 cm. En todos los pacientes el colgajo aportó almohadillado protector y resultados estéticos. Se observó rigidez articular en un paciente debido a la combinación con un colgajo de dedo cruzado. El objetivo de toda reconstrucción de punta de dedo es proveer cobertura pulpar suficiente al hueso para evitar inestabilidad y pérdida de sensibilidad como consecuencia de la reconstrucción. El colgajo en hacha es una opción versátil y segura para la reconstrucción de punta de dedo. Los diferentes diseños pueden ser usados conforme a nuestras necesidades.The hatchet flap described by Emmet, has been recently applied by Tuncali et al. in fingertip amputations. This single triangular flap can be used in different types of injuries, as transverse and lateral oblique amputations. The aim of our study was to present the authors´ experience with this versatile flap in fingertip reconstruction. Five patients who have completed their 1-year follow-up period were included in the study. The level of amputation was categorized according Ishikawa

  8. IRIS TOXICOLOGICAL REVIEW AND SUMMARY DOCUMENTS FOR BERYLLIUM AND COMPOUNDS

    Science.gov (United States)

    EPA's assessment of the noncancer health effects and carcinogenic potential of Beryllium was added to the IRIS database in 1998. The IRIS program is updating the IRIS assessment for Beryllium. This update will incorporate health effects information published since the last assess...

  9. Reparación de lesiones del cartílago articular de la rótula de conejos con injertos libres de pericondrio costal y periostio tibial: Estudio histológico comparativo

    OpenAIRE

    1998-01-01

    El propósito del presente, estudio experimental es comparar la capacidad condrogénica de injertos libres de pericondrio y periostio en lesiones que afectan a todo el espesor del cartílago articular rotuliano. Para ellos, se eligieron 18 conejos adolescentes de Nueva Zelanda con un peso comprendido entre los 2400 y 3600 gramos, a los que se realizó una lesión de 6 mm de diámetro y 3 mm de espesor en la superficie articular de la rótula, y se distribuyeron de modo aleatorio en tres grupos: con...

  10. Safety of cornea and iris in ocular surgery with 355-nm lasers.

    Science.gov (United States)

    Wang, Jenny; Chung, Jae Lim; Schuele, Georg; Vankov, Alexander; Dalal, Roopa; Wiltberger, Michael; Palanker, Daniel

    2015-09-01

    A recent study showed that 355-nm nanosecond lasers cut cornea with similar precision to infrared femtosecond lasers. However, use of ultraviolet wavelength requires precise assessment of ocular safety to determine the range of possible ophthalmic applications. In this study, the 355-nm nanosecond laser was evaluated for corneal and iris damage in rabbit, porcine, and human donor eyes as determined by minimum visible lesion (MVL) observation, live/dead staining of the endothelium, and apoptosis assay. Single-pulse damage to the iris was evaluated on porcine eyes using live/dead staining. In live rabbits, the cumulative median effective dose (ED50) for corneal damage was 231 J/cm2, as seen by lesion observation. Appearance of endothelial damage in live/dead staining or apoptosis occurred at higher radiant exposure of 287 J/cm2. On enucleated rabbit and porcine corneas, ED50 was 87 and 52 J/cm2, respectively, by MVL, and 241 and 160 J/cm2 for endothelial damage. In human eyes, ED50 for MVL was 110 J/cm2 and endothelial damage at 453 J/cm2. Single-pulse iris damage occurred at ED 50 of 208 mJ/cm2. These values determine the energy permitted for surgical patterns and can guide development of ophthalmic laser systems. Lower damage threshold in corneas of enucleated eyes versus live rabbits is noted for future safety evaluation.

  11. IRIS Toxicological Review and Summary Documents for ...

    Science.gov (United States)

    Carbon tetrachloride is a volatile haloalkane with a wide range of industrial and chemical applications. It is produced commercially from chlorination of a variety of low molecular weight hydrocarbons such as carbon disulfide, methanol, methane, propane, and ethylene dichloride. It is also produced by thermal chlorination in the production of tetrachloroethylene. Major uses of carbon tetrachloride have been in the recovery of tin from tin plating waste, in formulation of petrol additives and refrigerants, in metal degreasing and agricultural fumigants, in chlorination of organic compounds, in the production of semiconductors, in the reduction of fire hazard, as a solvent for rubber cement, and as a catalyst in polymer technology. Its production has been decreasing and it is no longer permitted in products intended for home use. Despite this ban, carbon tetrachloride has been detected at 314 hazardous waste sites. EPA's assessment of noncancer health effects and carcinogenic potential of carbon tetrachloride was last prepared and added to the IRIS database in 1991. The IRIS program is preparing an assessment that will incorporate health effects information available for carbon tetrachloride, and current risk assessment methods. The IRIS assessment for carbon tetrachloride will consist of a Toxicological Review and IRIS Summary. The Toxicological Review is a critical review of the physiochemical and toxicokinetic properties of a chemical, and its toxicity

  12. Iris recognition using the JAVAVis Library

    Directory of Open Access Journals (Sweden)

    L.Martin García

    2008-12-01

    Full Text Available This project has been created to develop a biometric identification system through a man’s iris using a computer to perform the processing of the pictures. To develop this application, and to differentiate the project from others who have already implemented, we have used the image processing library JAVAVis and JAVA as a programming language.

  13. Asociación entre la presencia de anticuerpos anti-Ras y anti-VPH16 E4/E7 y lesiones intraepiteliales del cérvix

    Directory of Open Access Journals (Sweden)

    Vázquez-Corzo Sara

    2003-01-01

    Full Text Available OBJETIVO: Determinar si anticuerpos séricos contra E4, E7 y Ras pueden ser utilizados como marcadores de lesiones tempranas del cérvix uterino asociadas al virus del papiloma humano. MATERIAL Y MÉTODOS: Entre marzo de 1999 y abril de 2000 se realizó un estudio sero-epidemiológico de casos y controles en la clínica de displasias del Hospital General Doctor Gea González, en la Ciudad de México, en 116 muestras de suero para evaluar la presencia de anticuerpos anti-E4, E7 y Ras utilizando un ELISA de captura. Se estimaron razones de momios e intervalos de confianza de 95% RESULTADOS: Anticuerpos anti-E7 se asociaron a mujeres con lesiones NIC III, mientras que anticuerpos anti-E4 y anti-Ras fueron más frecuentes en lesiones NIC I-II. Al evaluar el perfil de anticuerpos que presentaron las mujeres, encontramos que a anticuerpos contra dos proteínas predicen la existencia de una lesión NIC I-II, y b la presencia de tres anticuerpos predicen una lesión NIC III. CONCLUSIONES: La detección de anticuerpos séricos contra E4, E7 y Ras en combinación con otras técnicas de diagnóstico, podrían ser de utilidad para detectar oportunamente a mujeres con lesiones tempranas asociadas al Virus del Papiloma Humano y en riesgo de desarrollar cáncer.

  14. Nail and skin lesions caused by scytalidium dimidiatum in Medellín (Colombia, 1990-1999: report of 128 cases and review of the name of the agent Lesiones ungueales y cutáneas por Scytalidium dimidiatum en Medellín (Colombia, 1990-1999. Presentación de 128 casos y revisión del problema del nombre del agente

    Directory of Open Access Journals (Sweden)

    Jaime Carmona Fonseca

    2000-03-01

    hyphae alone or with chlamydospores (21% and yeast cells alone or with pseudohyphae (5%. There was no significant difference between the results of nail and skin Objetivo:Revisar el problema de la denominación del agente y presentar los rasgos epidemiológicos de 128 casos de lesiones en uñas o en piel por Scytalidium dimidiatum. Diseño: Estudio descriptivo, en parte retrospectivo (1990-1996 y en parte prospectivo (1997-1999. Marco de referencia: hasta hace poco tiempo hubo problemas con la nomenclatura del agente, pero ahora existen los argumentos para despejar las dificultades y ese es el primer objetivo del trabajo: presentar esos argumentos e indicar la manera de usar bien uno u otro nombre. Por otra parte, la importancia del S. dimidiatum como causa de lesiones en humanos aumenta cada día. Este informe, restringido a lesiones en uñas y piel, recoge una cifra muy alta de pacientes (128 casos, correspondientes al lapso 1990-1999. Métodos: los autores revisaron cada uno de los registros de laboratorio y, aplicando criterios de consenso, resolvieron las dudas. Se utilizaron criterios estándar de identificación micológica. El análisis estadístico de los datos se hizo con el programa EpiInfo versión 6.04. y consistió, principalmente, en evaluar la asociación de variables con la chi cuadrada y en comparar posiciones de datos continuos y ordenados según su magnitud con la prueba H de Kruskal-Wallis. Resultados: los diferentes nombres del agente (Nattrassia mangiferae, Scytalidium dimidiatum, Scytalidium hialinum, Scytalidium lignicola, Hendersonula toruloidea deben usarse en situaciones precisas, que se describen aquí. Se estudiaron 128 muestras de las cuales se aisló por cultivo Scytalidium dimidiatum: 102 en uñas (92% en pies y 26 en lesiones extraungueales (73% interdigitales en pies. Las características epidemiológicas de un caso típico de lesión ungueal por S. dimidiatum indican que en el 41% de las veces es una mujer, de 21 a 49 años, que usa

  15. [Intraoperative floppy iris syndrome--a prospective study].

    Science.gov (United States)

    Nicula, Cristina; Nicula, D; Popescu, Raluca

    2013-01-01

    is to evaluate the incidence and typical signs of floppy iris syndrome intraoperatory revealed in patients diagnosed with cataracts. We studied a total of 15 eyes diagnosed with cataracts, belonging to 14 patients who had been treated chronically with Tamsulosin for benign prostatic hyperplasia. In 80% of cases we have seen a preoperative semimidriasis which required iris hooks in 5 eyeballs. On 1 eye preoperative semimidriasis was sufficient for capsulorhexis, but later pupil became miotic, requiring iris hooks. On 4 eye flaccid iris was noticed, that prolabated in corneal incision. floppy iris syndrome occurs in patients treated with Tamsulosin for benign prostatic hyperplasia, generating a series of difficulties during cataract surgery.

  16. Anterior segment optical coherence tomography findings of iris granulomas in Hansen's disease: a case report.

    Science.gov (United States)

    Mahendradas, Padmamalini; Avadhani, Kavitha; Ramachandran, Sarika; Srinivas, Sahana; Naik, Madhavi; Shetty, K Bhujang

    2013-02-11

    A 50-year-old male was diagnosed to have a right eye sclerouveitis and left eye granulomatous anterior uveitis due to Hansen's disease. We are reporting the anterior segment optical coherence tomography (ASOCT) findings of iris granuloma in this case. Skin biopsy revealed plenty of acid fast bacilli with a bacteriological index of 5 suggestive of multibacillary polar lepromatous leprosy. ASOCT revealed well-demarcated smooth-surfaced nodular lesion with internal hyporeflectivity corresponding to the areas of granuloma which decreased in size following treatment with antileprosy drugs and systemic and topical steroids. ASOCT is a non-invasive technique to assess the extent of involvement of anterior segment in Hansen's disease and is a useful tool in follow-up. This is also the first report on ASOCT findings of iris granuloma in Hansen's disease.

  17. Checking the new IRI model The bottomside B parameters

    CERN Document Server

    Mosert, M; Ezquer, R; Lazo, B; Miro, G

    2002-01-01

    Electron density profiles obtained at Pruhonice (50.0, 15.0), El Arenosillo (37.1, 353.2) and Havana (23, 278) were used to check the bottom-side B parameters BO (thickness parameter) and B1 (shape parameter) predicted by the new IRI - 2000 version. The electron density profiles were derived from ionograms using the ARP technique. The data base includes daytime and nighttime ionograms recorded under different seasonal and solar activity conditions. Comparisons with IRI predictions were also done. The analysis shows that: a) The parameter B1 given by IRI 2000 reproduces better the observed ARP values than the IRI-90 version and b) The observed BO values are in general well reproduced by both IRI versions: IRI-90 and IRI-2000.

  18. A novel iris segmentation algorithm based on small eigenvalue analysis

    Science.gov (United States)

    Harish, B. S.; Aruna Kumar, S. V.; Guru, D. S.; Ngo, Minh Ngoc

    2015-12-01

    In this paper, a simple and robust algorithm is proposed for iris segmentation. The proposed method consists of two steps. In first step, iris and pupil is segmented using Robust Spatial Kernel FCM (RSKFCM) algorithm. RSKFCM is based on traditional Fuzzy-c-Means (FCM) algorithm, which incorporates spatial information and uses kernel metric as distance measure. In second step, small eigenvalue transformation is applied to localize iris boundary. The transformation is based on statistical and geometrical properties of the small eigenvalue of the covariance matrix of a set of edge pixels. Extensive experimentations are carried out on standard benchmark iris dataset (viz. CASIA-IrisV4 and UBIRIS.v2). We compared our proposed method with existing iris segmentation methods. Our proposed method has the least time complexity of O(n(i+p)) . The result of the experiments emphasizes that the proposed algorithm outperforms the existing iris segmentation methods.

  19. IRDO: Iris Recognition by fusion of DTCWT and OLBP

    Directory of Open Access Journals (Sweden)

    Arunalatha J S

    2015-03-01

    Full Text Available Iris Biometric is a physiological trait of human beings. In this paper, we propose Iris an Recognition using Fusion of Dual Tree Complex Wavelet Transform (DTCWT and Over Lapping Local Binary Pattern (OLBP Features. An eye is preprocessed to extract the iris part and obtain the Region of Interest (ROI area from an iris. The complex wavelet features are extracted for region from the Iris DTCWT. OLBP is further applied on ROI to generate features of magnitude coefficients. The resultant features are generated by fusing DTCWT and OLBP using arithmetic addition. The Euclidean Distance (ED is used to compare test iris with database iris features to identify a person. It is observed that the values of Total Success Rate (TSR and Equal Error Rate (EER are better in the case of proposed IRDO compared to the state-of-the art techniques.

  20. Identity Recognizing using Iris Scan with multiple frames of Video

    Directory of Open Access Journals (Sweden)

    Asha Latha Bandi

    2012-03-01

    Full Text Available The field of iris biometrics has been significant research over the last decade. At this point, iris capture has become a main stream technology with wide acceptance. A general iris recognition systemworks with four different steps. 1. Capturing the image from the eye. 2. Extracting iris from the processed image. 3. Transforming the raw image coordinates into normalized polar coordinates. 4. Finally the iris code is compared with known iris code for identification of a person. Iris performance can be improved by creating a single average image. We prepared two different sets of images called gallery set of images and probe set of images and then compared all gallery set images to all probe set images. This comparison gives better recognition performance.

  1. INHIBICIÓN DE LESIONES POR FRÍO DE PITAYA AMARILLA (Acanthocereus pitajaya A TRAVÉS DEL CHOQUE TÉRMICO: CATALASA, PEROXIDASA Y POLIFENOLOXIDASA

    Directory of Open Access Journals (Sweden)

    NARVÁEZ CUENCA CARLOS EDUARDO

    2008-04-01

    Full Text Available

    En los ensayos de almacenamiento de pitaya a temperatura ambiente de Bogotá (18 ºC se encontró que esta fruta tiene un comportamiento climatérico con un máximo en la respiración luego de tres días de iniciado el almacenamiento. En el máximo climatérico la actividad de catalasa fue máxima, en tanto que en la etapa de senescencia las actividades de peroxidasa y polifenoloxidasa exhibieron valores máximos. El choque térmico inhibió las lesiones por frío, vistas en los frutos refrigerados a 2 °C, este choque incrementó la actividad de catalasa y peroxidasa y disminuyó la actividad de polifenoloxidasa, respecto a los frutos refrigerados sin tratamiento de choque térmico. Los resultados muestran que la catalasa está en relación directa con la vida útil del fruto, mientras que polifenoloxidasa guarda estrecha relación con el deterioro. La peroxidasa manifiesta su acción antioxidante con la generación de pardeamiento, en frutos almacenados a temperatura ambiente, si bien en los tratados con choque térmico, su acción antioxidante no va de la mano con el incremento en el pardeamiento, por lo que en este caso, su expresión fue favorable. Los resultados encontrados se constituyen en un aporte en la búsqueda de técnicas que permitan mayores tiempos de vida en anaquel de los frutos.

  2. INHIBICIÓN DE LESIONES POR FRÍO DE PITAYA AMARILLA (Acanthocereus pitajaya A TRAVÉS DEL CHOQUE TÉRMICO: CATALASA, PEROXIDASA Y POLIFENOLOXIDASA

    Directory of Open Access Journals (Sweden)

    YENNY MARITZA DUEÑAS GÓMEZ

    2008-01-01

    Full Text Available En los ensayos de almacenamiento de pitaya a temperatura ambiente de Bogotá (18 ºC se encontró que esta fruta tiene un comportamiento climatérico con un máximo en la respiración luego de tres días de iniciado el almacenamiento. En el máximo climatérico la actividad de catalasa fue máxima, en tanto que en la etapa de senescen- cia las actividades de peroxidasa y polifenoloxidasa exhibieron valores máximos. El choque térmico inhibió las lesiones por frío, vistas en los frutos refrigerados a 2 °C, este choque incrementó la actividad de catalasa y peroxidasa y disminuyó la actividad de polifenoloxidasa, respecto a los frutos refrigerados sin tratamiento de choque térmico. Los resultados muestran que la catalasa está en relación directa con la vida útil del fruto, mientras que polifenoloxidasa guarda estrecha relación con el deterioro. La peroxidasa manifiesta su acción antioxidante con la generación de pardeamiento, en frutos almacenados a temperatura ambiente, si bien en los tratados con choque térmico, su acción antioxidante no va de la mano con el incremento en el pardea- miento, por lo que en este caso, su expresión fue favorable. Los resultados encon- trados se constituyen en un aporte en la búsqueda de técnicas que permitan mayores tiempos de vida en anaquel de los frutos.

  3. Asociación entre la presencia de anticuerpos anti-Ras y anti-VPH16 E4/E7 y lesiones intraepiteliales del cérvix Association between anti-Ras and anti-HPV16 E4/E7 antibodies with cervical intraepithelial lesions

    Directory of Open Access Journals (Sweden)

    Sara Vázquez-Corzo

    2003-10-01

    Full Text Available OBJETIVO: Determinar si anticuerpos séricos contra E4, E7 y Ras pueden ser utilizados como marcadores de lesiones tempranas del cérvix uterino asociadas al virus del papiloma humano. MATERIAL Y MÉTODOS: Entre marzo de 1999 y abril de 2000 se realizó un estudio sero-epidemiológico de casos y controles en la clínica de displasias del Hospital General Doctor Gea González, en la Ciudad de México, en 116 muestras de suero para evaluar la presencia de anticuerpos anti-E4, E7 y Ras utilizando un ELISA de captura. Se estimaron razones de momios e intervalos de confianza de 95% RESULTADOS: Anticuerpos anti-E7 se asociaron a mujeres con lesiones NIC III, mientras que anticuerpos anti-E4 y anti-Ras fueron más frecuentes en lesiones NIC I-II. Al evaluar el perfil de anticuerpos que presentaron las mujeres, encontramos que a anticuerpos contra dos proteínas predicen la existencia de una lesión NIC I-II, y b la presencia de tres anticuerpos predicen una lesión NIC III. CONCLUSIONES: La detección de anticuerpos séricos contra E4, E7 y Ras en combinación con otras técnicas de diagnóstico, podrían ser de utilidad para detectar oportunamente a mujeres con lesiones tempranas asociadas al Virus del Papiloma Humano y en riesgo de desarrollar cáncer.OBJECTIVE: To evaluate whether serum antibodies anti-E4, E7 and Ras could be used as markers for early cervical lesions associated with HPV (human papillomavirus. MATERIAL AND METHODS: A seroepidemiological case-control study was conducted between March 1999 and April 2000 at the dysplasia clinic of Hospital General Doctor Gea Gonzalez, in Mexico City, to evaluate the presence of antibodies anti-E4, E7, and Ras through a sandwich ELISA. Analysis was done using odds ratios and 95% confidence intervals. RESULTS: Anti-E7 antibodies were associated to women with CIN III lesions, while anti-E4 and Ras antibodies were strongly associated with CIN I-II lesions. The antibody profile of women with different

  4. The Interface Region Imaging Spectrograph (IRIS)

    Science.gov (United States)

    De Pontieu, B.; Title, A. M.; Lemen, J. R.; Kushner, G. D.; Akin, D. J.; Allard, B.; Berger, T.; Boerner, P.; Cheung, M.; Chou, C.; Drake, J. F.; Duncan, D. W.; Freeland, S.; Heyman, G. F.; Hoffman, C.; Hurlburt, N. E.; Lindgren, R. W.; Mathur, D.; Rehse, R.; Sabolish, D.; Seguin, R.; Schrijver, C. J.; Tarbell, T. D.; Wülser, J.-P.; Wolfson, C. J.; Yanari, C.; Mudge, J.; Nguyen-Phuc, N.; Timmons, R.; van Bezooijen, R.; Weingrod, I.; Brookner, R.; Butcher, G.; Dougherty, B.; Eder, J.; Knagenhjelm, V.; Larsen, S.; Mansir, D.; Phan, L.; Boyle, P.; Cheimets, P. N.; DeLuca, E. E.; Golub, L.; Gates, R.; Hertz, E.; McKillop, S.; Park, S.; Perry, T.; Podgorski, W. A.; Reeves, K.; Saar, S.; Testa, P.; Tian, H.; Weber, M.; Dunn, C.; Eccles, S.; Jaeggli, S. A.; Kankelborg, C. C.; Mashburn, K.; Pust, N.; Springer, L.; Carvalho, R.; Kleint, L.; Marmie, J.; Mazmanian, E.; Pereira, T. M. D.; Sawyer, S.; Strong, J.; Worden, S. P.; Carlsson, M.; Hansteen, V. H.; Leenaarts, J.; Wiesmann, M.; Aloise, J.; Chu, K.-C.; Bush, R. I.; Scherrer, P. H.; Brekke, P.; Martinez-Sykora, J.; Lites, B. W.; McIntosh, S. W.; Uitenbroek, H.; Okamoto, T. J.; Gummin, M. A.; Auker, G.; Jerram, P.; Pool, P.; Waltham, N.

    2014-07-01

    The Interface Region Imaging Spectrograph (IRIS) small explorer spacecraft provides simultaneous spectra and images of the photosphere, chromosphere, transition region, and corona with 0.33 - 0.4 arcsec spatial resolution, two-second temporal resolution, and 1 km s-1 velocity resolution over a field-of-view of up to 175 arcsec × 175 arcsec. IRIS was launched into a Sun-synchronous orbit on 27 June 2013 using a Pegasus-XL rocket and consists of a 19-cm UV telescope that feeds a slit-based dual-bandpass imaging spectrograph. IRIS obtains spectra in passbands from 1332 - 1358 Å, 1389 - 1407 Å, and 2783 - 2834 Å, including bright spectral lines formed in the chromosphere (Mg ii h 2803 Å and Mg ii k 2796 Å) and transition region (C ii 1334/1335 Å and Si iv 1394/1403 Å). Slit-jaw images in four different passbands (C ii 1330, Si iv 1400, Mg ii k 2796, and Mg ii wing 2830 Å) can be taken simultaneously with spectral rasters that sample regions up to 130 arcsec × 175 arcsec at a variety of spatial samplings (from 0.33 arcsec and up). IRIS is sensitive to emission from plasma at temperatures between 5000 K and 10 MK and will advance our understanding of the flow of mass and energy through an interface region, formed by the chromosphere and transition region, between the photosphere and corona. This highly structured and dynamic region not only acts as the conduit of all mass and energy feeding into the corona and solar wind, it also requires an order of magnitude more energy to heat than the corona and solar wind combined. The IRIS investigation includes a strong numerical modeling component based on advanced radiative-MHD codes to facilitate interpretation of observations of this complex region. Approximately eight Gbytes of data (after compression) are acquired by IRIS each day and made available for unrestricted use within a few days of the observation.

  5. Deficiencia de micronutrientes en la dieta del paciente con lesiones precancerosas del cérvix de una clínica de colposcopía en Ciudad Juárez, México

    Directory of Open Access Journals (Sweden)

    Ana Lidia Arellano Ortiz

    Full Text Available Introducción: las lesiones intraepiteliales escamosas (LIE son un estado de transición hacia el cáncer cervicouterino (CaCu y un déficit de micronutrientes puede acelerar este proceso. Por ello, determinar la existencia de este déficit y conocer qué factores se asocian permitiría una posible prevención en esta población de riesgo. Objetivo: determinar la presencia de alguna deficiencia de micronutrientes involucrados en el proceso anticancerígeno y asociar este déficit con hábitos y factores demográficos en pacientes con LIE de Ciudad Juárez, Chihuahua, México. Métodos: en un estudio transversal analítico fueron seleccionadas 102 pacientes con LIE. Se realizó una encuesta dietaría (recordatorio de 24 horas para estimar la ingesta de micronutrientes. La deficiencia fue determinada con un consumo < 75% de la ingesta diaria recomendada o sugerida (IDR o IDS en México. Algunos hábitos y factores demográficos fueron obtenidos mediante la entrevista con la paciente. Se realizó un modelo de regresión logística para asociar la presencia de deficiencia con factores que afectan a la ingesta o incrementan el requerimiento de micronutrientes. Resultados: el retinol, ácido fólico, zinc, vitaminas C y E, considerados como micronutrientes en el proceso anticancerígeno del CaCu, se encontraron por debajo del 75% de la IDR. Aquellas mujeres con sobrepeso, obesidad y amas de casa se asociaron significativamente con la deficiencia de micronutrientes. Conclusión: el sobrepeso, la obesidad y la ocupación han sido asociados para presentar deficiencias de micronutrientes en este estudio. Estas variables convergen en una posible inseguridad alimentaria, la cual podría asociarse al incremento de incidencia de CaCu en México.

  6. Are IRIS bombs connected to Ellerman bombs?

    CERN Document Server

    Tian, Hui; He, Jiansen; Madsen, Chad

    2016-01-01

    Recent observations by the Interface Region Imaging Spectrograph (IRIS) have revealed pockets of hot gas ($\\sim$2--8$\\times$10$^{4}$ K) potentially resulting from magnetic reconnection in the partially ionized lower solar atmosphere (IRIS bombs; IBs). Using joint observations between IRIS and the Chinese New Vacuum Solar Telescope, we have identified ten IBs. We find that three are unambiguously and three others are possibly connected to Ellerman bombs (EBs), which show intense brightening of the extended H$_{\\alpha}$ wings without leaving an obvious signature in the H$_{\\alpha}$ core. These bombs generally reveal the following distinct properties: (1) The O~{\\sc{iv}}~1401.156\\AA{} and 1399.774\\AA{} lines are absent or very weak; (2) The Mn~{\\sc{i}}~2795.640\\AA{} line manifests as an absorption feature superimposed on the greatly enhanced Mg~{\\sc{ii}}~k line wing; (3) The Mg~{\\sc{ii}}~k and h lines show intense brightening in the wings and no dramatic enhancement in the cores; (4) Chromospheric absorption lin...

  7. [Analysis of iris: history and future].

    Science.gov (United States)

    Norn, Mogens

    2003-01-01

    Analysis of the iris has ancient roots, but iridology in its present sense was established by Philippi Meyers in 1670. The discipline was further developed by Ignaz Péczely in 1881 and by Nils Liljequist in 1890. Other studies have been published in Germany, Sweden, Norway, England, France, USA, Australia and elsewhere, and iridology is practiced worldwide. The techniques used are described and the sources of error are mentioned when several photos from the same patient are compared (e.g. the influences of differences in pupil size, magnification and the effect of oblique light). The iris key (irigraphy) and the interpretation of different sights are discussed in some detail; there is little agreement among iridologists. Some iris diagnoses are of little interest to day and some modern diseases are missing in the diagnostic system. Controlled studies reveal that iridology is of no use whatsoever for the detection of cancer and other diseases in the stomach, intestines, kidney, lungs and heart. The reason for the continued popularity of iridology is discussed, and it is concluded that this type of alternative medicine is not harmless.

  8. Computerized ionospheric tomography with the IRI model

    Science.gov (United States)

    Arikan, Orhan; Arikan, Feza; Erol, Cemil B.

    Computerized ionospheric tomography (CIT) is a method to estimate ionospheric electron density distribution by using the global positioning system (GPS) signals recorded by the GPS receivers. Ionospheric electron density is a function of latitude, longitude, height and time. A general approach in CIT is to represent the ionosphere as a linear combination of basis functions. In this study, the model of the ionosphere is obtained from the IRI in latitude and height only. The goal is to determine the best representing basis function from the set of Squeezed Legendre polynomials, truncated Legendre polynomials, Haar Wavelets and singular value decomposition (SVD). The reconstruction algorithms used in this study can be listed as total least squares (TLS), regularized least squares, algebraic reconstruction technique (ART) and a hybrid algorithm where the reconstruction from the TLS algorithm is used as the initial estimate for the ART. The error performance of the reconstruction algorithms are compared with respect to the electron density generated by the IRI-2001 model. In the investigated scenario, the measurements are obtained from the IRI-2001 as the line integral of the electron density profiles, imitating the total electron content estimated from GPS measurements. It has been observed that the minimum error between the reconstructed and model ionospheres depends on both the reconstruction algorithm and the basis functions where the best results have been obtained for the basis functions from the model itself through SVD.

  9. The Interface Region Imaging Spectrograph (IRIS)

    CERN Document Server

    De Pontieu, B; Lemen, J; Kushner, G D; Akin, D J; Allard, B; Berger, T; Boerner, P; Cheung, M; Chou, C; Drake, J F; Duncan, D W; Freeland, S; Heyman, G F; Hoffman, C; Hurlburt, N E; Lindgren, R W; Mathur, D; Rehse, R; Sabolish, D; Seguin, R; Schrijver, C J; Tarbell, T D; Wuelser, J -P; Wolfson, C J; Yanari, C; Mudge, J; Nguyen-Phuc, N; Timmons, R; van Bezooijen, R; Weingrod, I; Brookner, R; Butcher, G; Dougherty, B; Eder, J; Knagenhjelm, V; Larsen, S; Mansir, D; Phan, L; Boyle, P; Cheimets, P N; DeLuca, E E; Golub, L; Gates, R; Hertz, E; McKillop, S; Park, S; Perry, T; Podgorski, W A; Reeves, K; Saar, S; Testa, P; Tian, H; Weber, M; Dunn, C; Eccles, S; Jaeggli, S A; Kankelborg, C C; Mashburn, K; Pust, N; Springer, L; Carvalho, R; Kleint, L; Marmie, J; Mazmanian, E; Pereira, T M D; Sawyer, S; Strong, J; Worden, S P; Carlsson, M; Hansteen, V H; Leenaarts, J; Wiesmann, M; Aloise, J; Chu, K -C; Bush, R I; Scherrer, P H; Brekke, P; Martinez-Sykora, J; Lites, B W; McIntosh, S W; Uitenbroek, H; Okamoto, T J; Gummin, M A; Auker, G; Jerram, P; Pool, P; Waltham, N

    2014-01-01

    The Interface Region Imaging Spectrograph (IRIS) small explorer spacecraft provides simultaneous spectra and images of the photosphere, chromosphere, transition region, and corona with 0.33-0.4 arcsec spatial resolution, 2 s temporal resolution and 1 km/s velocity resolution over a field-of-view of up to 175 arcsec x 175 arcsec. IRIS was launched into a Sun-synchronous orbit on 27 June 2013 using a Pegasus-XL rocket and consists of a 19-cm UV telescope that feeds a slit-based dual-bandpass imaging spectrograph. IRIS obtains spectra in passbands from 1332-1358, 1389-1407 and 2783-2834 Angstrom including bright spectral lines formed in the chromosphere (Mg II h 2803 Angstrom and Mg II k 2796 Angstrom) and transition region (C II 1334/1335 Angstrom and Si IV 1394/1403 Angstrom). Slit-jaw images in four different passbands (C II 1330, Si IV 1400, Mg II k 2796 and Mg II wing 2830 Angstrom) can be taken simultaneously with spectral rasters that sample regions up to 130 arcsec x 175 arcsec at a variety of spatial sa...

  10. Infrasound product resources at the IRIS DMC

    Science.gov (United States)

    Bahavar, M.; Trabant, C.; Hutko, A. R.; Karstens, R.

    2012-12-01

    In 2011 infrasound sensors were installed at some existing USArray Transportable Array (TA) sites and became a standard component of all new sites. Currently there are over 400 sites with infrasound sensors with an average spacing of 70 kilometers. To promote and facilitate the use of these data the IRIS Data Management Center has developed two new data products: an infrasound reference event database and an infrasound signal detector. The TA Infrasound Reference Event Database (TAIRED) is a user-supported database that contains information on events of interest for which there are associated USArray microbarograph recordings. This database is initially populated with a few events from observations on the USArray infrasound data, event bulletins, news on explosions, meteorological events and rocket launches. As a user-supported resource, we ask users to submit events of interest to be included in the database or submit their alternate solutions to the existing events. The second data product is an infrasound signal detector that regularly scans the USArray broadband infrasound data (BDF channel sampled at 40 Hz) and produces detections that highlight time intervals containing potential signals of interest. The detection product includes two components, standard signal-to-noise ratio based detections and spectral power based detections. No attempt is made to categorize detections or associate them to events. These data products join the growing collection of products produced and managed at the IRIS DMC, for the complete list please visit http://www.iris.edu/dms/products/.

  11. Evaluación del módulo de elasticidad de materiales estéticos para la restauración de lesiones cervicales Assessment of the elasticity module of aesthetic materials for restoration of cervical lesions

    OpenAIRE

    Claudia Estela Bonnin; María del Carmen Urquia Morales

    2012-01-01

    La pérdida de tejido en la zona cervical ha sido atribuida principalmente a la erosión y abrasión producidas por el cepillo de dientes. El rol de las fuerzas oclusales es un factor muy importante a tener en cuenta en el desarrollo y avance de estas lesiones cervicales no cariosas. Distinguir las diferentes propiedades mecánicas y sobre todo el módulo de elasticidad de los materiales estéticos utilizados para la restauración de este tipo de lesiones, permitirá una sobrevida mayor de las obtura...

  12. Otras enfermedades periodontales: II: Lesiones endo-periodontales y condiciones y/o deformidades del desarrollo o adquiridas Other periodontal diseases: II. Endo-perio lesions and conditions and/or malformations developed or acquired

    OpenAIRE

    I. Sanz-Sánchez; A. Bascones-Martínez

    2008-01-01

    Introducción: En el último workshop en periodoncia, llevado a cabo por la asociación americana de periodoncia en 1999, se añadieron, entre otros, un grupo de lesiones y de condiciones que, por su prevalencia y por la imposibilidad de ser clasificados en otros grupos, debían ser tenidos en cuenta y analizados de un modo distinto para establecer un correcto diagnóstico diferencial. Los objetivos de este trabajo son: a) Conocer el impacto de las lesiones endo-periodontales y ser capaces de reali...

  13. Iris image recognition wavelet filter-banks based iris feature extraction schemes

    CERN Document Server

    Rahulkar, Amol D

    2014-01-01

    This book provides the new results in wavelet filter banks based feature extraction, and the classifier in the field of iris image recognition. It provides the broad treatment on the design of separable, non-separable wavelets filter banks, and the classifier. The design techniques presented in the book are applied on iris image analysis for person authentication. This book also brings together the three strands of research (wavelets, iris image analysis, and classifier). It compares the performance of the presented techniques with state-of-the-art available schemes. This book contains the compilation of basic material on the design of wavelets that avoids reading many different books. Therefore, it provide an easier path for the new-comers, researchers to master the contents. In addition, the designed filter banks and classifier can also be effectively used than existing filter-banks in many signal processing applications like pattern classification, data-compression, watermarking, denoising etc.  that will...

  14. Efficient iris recognition via ICA feature and SVM classifier

    Institute of Scientific and Technical Information of China (English)

    Wang Yong; Xu Luping

    2007-01-01

    To improve flexibility and reliability of iris recognition algorithm while keeping iris recognition success rate, an iris recognition approach for combining SVM with ICA feature extraction model is presented. SVM is a kind of classifier which has demonstrated high generalization capabilities in the object recognition problem. And ICA is a feature extraction technique which can be considered a generalization of principal component analysis. In this paper, ICA is used to generate a set of subsequences of feature vectors for iris feature extraction. Then each subsequence is classified using support vector machine sequence kernels. Experiments are made on CASIA iris database, the result indicates combination of SVM and ICA can improve iris recognition flexibility and reliability while keeping recognition success rate.

  15. New Ultrasound Biomicroscopy Iris Findings in Juvenile Xanthogranuloma.

    Science.gov (United States)

    Syed, Zeba A; Chen, Teresa C

    2016-08-01

    We report a case of juvenile xanthogranuloma in a 12-month-old girl presenting with heterochromia, hyphema, and elevated intraocular pressure. This case demonstrates new ultrasound biomicroscopy iris findings of a generalized bumpy iris contour, suggesting diffuse heterogeneous involvement. This imaging finding has not been previously described. Untreated, iris juvenile xanthogranuloma may lead to corneal blood staining, glaucoma, and amblyopia. An understanding of the full range of ultrasound features of juvenile xanthogranuloma expands our appreciation for the clinical findings in this condition.

  16. Lesiones en el deporte

    Directory of Open Access Journals (Sweden)

    Rubio Gimeno, Silvio

    2000-02-01

    Full Text Available Not available

    El incremento de la actividad física y del deporte, en las sociedades llamadas desarrolladas, ha traído consigo beneficios claros para la salud, reflejados en diferentes indicadores de salud. Simultáneamente, el deporte de competición obliga a una dedicación diaria a intensidad de entrenamiento, con objeto de obtener los elevados requerimientos físicos que exige la competición. Todo ello ha traído consigo la aparición de numerosas lesiones, fundamentalmente del sistema músculo- esquelético.
    Se exponen en este trabajo consideraciones históricas, la epidemiología de la lesión deportiva y se describen, concisamente, algunas de las lesiones más habituales y significativas que afectan a músculos, tendones y sistema esquelético.

  17. FUV Continuum in Flare Kernels Observed by IRIS

    Science.gov (United States)

    Daw, Adrian N.; Kowalski, Adam; Allred, Joel C.; Cauzzi, Gianna

    2016-05-01

    Fits to Interface Region Imaging Spectrograph (IRIS) spectra observed from bright kernels during the impulsive phase of solar flares are providing long-sought constraints on the UV/white-light continuum emission. Results of fits of continua plus numerous atomic and molecular emission lines to IRIS far ultraviolet (FUV) spectra of bright kernels are presented. Constraints on beam energy and cross sectional area are provided by cotemporaneous RHESSI, FERMI, ROSA/DST, IRIS slit-jaw and SDO/AIA observations, allowing for comparison of the observed IRIS continuum to calculations of non-thermal electron beam heating using the RADYN radiative-hydrodynamic loop model.

  18. Iris recognition as a biometric method after cataract surgery

    Directory of Open Access Journals (Sweden)

    Roizenblatt Jaime

    2004-01-01

    Full Text Available Abstract Background Biometric methods are security technologies, which use human characteristics for personal identification. Iris recognition systems use iris textures as unique identifiers. This paper presents an analysis of the verification of iris identities after intra-ocular procedures, when individuals were enrolled before the surgery. Methods Fifty-five eyes from fifty-five patients had their irises enrolled before a cataract surgery was performed. They had their irises verified three times before and three times after the procedure, and the Hamming (mathematical distance of each identification trial was determined, in a controlled ideal biometric environment. The mathematical difference between the iris code before and after the surgery was also compared to a subjective evaluation of the iris anatomy alteration by an experienced surgeon. Results A correlation between visible subjective iris texture alteration and mathematical difference was verified. We found only six cases in which the eye was no more recognizable, but these eyes were later reenrolled. The main anatomical changes that were found in the new impostor eyes are described. Conclusions Cataract surgeries change iris textures in such a way that iris recognition systems, which perform mathematical comparisons of textural biometric features, are able to detect these changes and sometimes even discard a pre-enrolled iris considering it an impostor. In our study, re-enrollment proved to be a feasible procedure.

  19. Iris Localization Algorithm Based on Improved Generalized Symmetry Transform

    Institute of Scientific and Technical Information of China (English)

    左坤隆; 刘文耀; 朱昊; 王晓东

    2004-01-01

    Accuracy and fastness of iris localization are very important in automatic iris recognition. A new fast iris localization algorithm based on improved generalized symmetry transform (GST) was proposed by utilizing iris symmetry. GST was improved in three aspects:1) A new distance weight function is defined. The new weight function, which is effective in iris localization, utilized the characteristic of irises that the iris is a circular object and it has one inner boundary and one outer boundary. 2) Each calculation of the symmetry measurement of a pair of symmetry points was performed by taking one point of a pair as the starting point of the transformation. This is the most important reason for fast iris localization,due to which, repetitious computation was largely excluded. 3) A new phase weight function was proposed to adjust GST to locate circle target much better because the inner part of iris is darker than the outer part. The edge map of iris image was acquired and GST was only implemented on the edge point, which decreased computation without loss of accuracy. The modification of distance weight function and phase weight function leads to the accuracy of localization, and other ideas speed up the localization. Experiments show that the average speed of new algorithm is about 7.0-8.5 times as high as traditional ones including integro-differential operator and Hough transform method.

  20. Gabor Weber Local Descriptor for Bovine Iris Recognition

    Directory of Open Access Journals (Sweden)

    Shengnan Sun

    2013-01-01

    Full Text Available Iris recognition is a robust biometric technology. This paper proposes a novel local descriptor for bovine iris recognition, named Gabor Weber local descriptor (GWLD. We first compute the Gabor magnitude maps for the input bovine iris image, and then calculate the differential excitation and orientation for each pixel over each Gabor magnitude map. After that, we use these differential excitations and orientations to construct the GWLD histogram representation. Finally, histogram intersection is adopted to measure the similarity between different GWLD histograms. The experimental results on the SEU bovine iris database verify the representation power of our proposed local descriptor.

  1. Iris Recognition System Using Fractal Dimensions of Haar Patterns

    Directory of Open Access Journals (Sweden)

    Patnala S. R. Chandra Murty

    2009-09-01

    Full Text Available Classification of iris templates based on their texture patterns is one of the most effective methods in iris recognition systems. This paper proposes a novel algorithm for automatic iris classification based on fractal dimensions of Haar wavelet transforms is presented. Fractal dimensions obtained from multiple scale features are used to characterize the textures completely. Haar wavelet is applied in order to extract the multiple scale features at different resolutions from the iris image. Fractal dimensions are estimated from these patterns and a classifier is used to recognize the given image from a data base. Performance comparison was made among different classifiers.

  2. Limbus Impact on Off-angle Iris Degradation

    Energy Technology Data Exchange (ETDEWEB)

    Karakaya, Mahmut [ORNL; Barstow, Del R [ORNL; Santos-Villalobos, Hector J [ORNL; Thompson, Joseph W [ORNL; Bolme, David S [ORNL; Boehnen, Chris Bensing [ORNL

    2013-01-01

    The accuracy of iris recognition depends on the quality of data capture and is negatively affected by several factors such as angle, occlusion, and dilation. Off-angle iris recognition is a new research focus in biometrics that tries to address several issues including corneal refraction, complex 3D iris texture, and blur. In this paper, we present an additional significant challenge that degrades the performance of the off-angle iris recognition systems, called the limbus effect . The limbus is the region at the border of the cornea where the cornea joins the sclera. The limbus is a semitransparent tissue that occludes a side portion of the iris plane. The amount of occluded iris texture on the side nearest the camera increases as the image acquisition angle increases. Without considering the role of the limbus effect, it is difficult to design an accurate off-angle iris recognition system. To the best of our knowledge, this is the first work that investigates the limbus effect in detail from a biometrics perspective. Based on results from real images and simulated experiments with real iris texture, the limbus effect increases the hamming distance score between frontal and off-angle iris images ranging from 0.05 to 0.2 depending upon the limbus height.

  3. Person Identification System Using Fusion of Matching Score of Iris

    Directory of Open Access Journals (Sweden)

    Yogeshwari Borse

    2012-05-01

    Full Text Available Human iris provides a unique structure suitable for non-invasive biometric assessment. In particular the irises are as distinct as fingerprints even for twins. In this paper a system for person identification is presented that uses a technique of localization, alignment, feature extraction, matching the features of irises and finally the decision regarding the degree of match based on hamming distance. A CASIA iris database of iris images has been used in the implementation of the iris recognition system. The results show that proposed method is quite effective

  4. Phase-only Correlation in Human Iris Database

    Directory of Open Access Journals (Sweden)

    Alin C. Teuşdea

    2009-05-01

    Full Text Available This paper presents human eye-iris registration and matching in an iris database using phase-only correlation techniques. Two modified phase-only correlation techniques with efficient registration results are used: the rectangle band limited phase-only correlation method (BPOC and an elliptic limited phase-only correlation method (EPOC the last one being proposed by the authors. The results of the computer simulations obtained for these two methods are analyzed on the same iris database and the analysis denotes that the proposed method EPOC has better performances than BPOC method for iris matching in the used database.

  5. A Case of Iris Mammillation Associated with Nevus of Ota

    Directory of Open Access Journals (Sweden)

    Onur Polat

    2013-10-01

    Full Text Available Nevus of Ota is characterized by the presence of hyperpigmentation in the skin areas innervated by the first or the second branches of the trigeminal nerve. Women are affected three times as often as men. Although nevus of Ota is a congenital disorder, it can be seen in puberty or adulthood. Herein a case of nevus of Ota was reported accompanying iris heterochromia and rare iris mammillation. Because of the relationship between iris heterochromia and iris mammillation with glaucoma and especially uveal melanoma, all the patients with nevus of Ota should be monitored closely with regular ophthalmologic examination.

  6. Iris Transponder-Communications and Navigation for Deep Space

    Science.gov (United States)

    Duncan, Courtney B.; Smith, Amy E.; Aguirre, Fernando H.

    2014-01-01

    The Jet Propulsion Laboratory has developed the Iris CubeSat compatible deep space transponder for INSPIRE, the first CubeSat to deep space. Iris is 0.4 U, 0.4 kg, consumes 12.8 W, and interoperates with NASA's Deep Space Network (DSN) on X-Band frequencies (7.2 GHz uplink, 8.4 GHz downlink) for command, telemetry, and navigation. This talk discusses the Iris for INSPIRE, it's features and requirements; future developments and improvements underway; deep space and proximity operations applications for Iris; high rate earth orbit variants; and ground requirements, such as are implemented in the DSN, for deep space operations.

  7. IRIS Toxicological Review of Ethyl Tertiary Butyl Ether (ETBE) ...

    Science.gov (United States)

    The IRIS Toxicological Review of Ethyl Tertiary Butyl Ether (ETBE) was released for external peer review in April 2017. EPA’s Science Advisory Board’s (SAB) Chemical Assessment Advisory Committee (CAAC) will conduct a peer review of the scientific basis supporting the ETBE assessment and release a final report of their review. Information regarding the peer review can be found on the SAB website. EPA is conducting an Integrated Risk Information System (IRIS) health assessment for Ethyl Tertiary Butyl Ether (ETBE). The outcome of this project is a Toxicological Review and IRIS Summary for ETBE that will be entered into the IRIS database.

  8. Elaboración y aplicación de la guía de rasgos caligráficos “arco iris de Colores” para fortalecer la iniciación de la escritura de los niños y niñas de primer año de educación básica paralelo “A” del centro educativo Dr. Nicanor Larrea, de la ciudad de Riobamba período 2013 – 2014”.

    OpenAIRE

    2015-01-01

    87.- La investigación denominada, elaboración y aplicación de la guía de rasgos caligráficos “Arco Iris de Colores” para fortalecer la iniciación de la escritura de los niños y niñas de primer año de Educación Básica paralelo “A” del Centro Educativo Dr. Nicanor Larrea, de la ciudad de Riobamba periodo 2013-2014. Uno de los objetivos fundamentales de este trabajo está dirigida a la educación preescolar y constituye la preparación del niño para su posterior ingreso a la enseñanza de ...

  9. Assessment of IRI and IRI-Plas models over the African equatorial and low-latitude region

    Science.gov (United States)

    Adebiyi, S. J.; Adimula, I. A.; Oladipo, O. A.; Joshua, B. W.

    2016-07-01

    A reliable ionospheric specification by empirical models is important to mitigate the effects of the ionosphere on the operations of satellite-based positioning and navigation systems. This study evaluates the capability of the International Reference Ionosphere (IRI) and IRI extended to the plasmasphere (IRI-Plas) models in predicting the total electron content (TEC) over stations located in the southern hemisphere of the African equatorial and low-latitude region. TEC derived from Global Positioning System (GPS) measurements were compared with TEC predicted by both the IRI-Plas 2015 model and the three topside options of the IRI 2012 model (i.e., NeQuick (NeQ), IRI 2001 corrected factor (IRI-01 Corr), and the IRI 2001(IRI-01)). Generally, the diurnal and the seasonal structures of modeled TEC follow quite well with the observed TEC in all the stations, although with some upward and downward offsets observed during the daytime and nighttime. The prediction errors of both models exhibit latitudinal variation and these showed seasonal trends. The values generally decrease with increase in latitude. The TEC data-model divergence of both models is most significant at stations in the equatorial region during the daytime and nighttime. Conversely, both models demonstrate most pronounced convergence during the nighttime at stations outside the equatorial region. The IRI-Plas model, in general, performed better in months and seasons when the three options of the IRI model underestimate TEC. Factors such as the height limitation of the IRI model, the inaccurate predictions of the bottomside and topside electron density profiles were used to explain the data-model discrepancies.

  10. Intraoperative floppy iris syndrome (IFIS): a practical approach to medical and surgical considerations in cataract extractions

    DEFF Research Database (Denmark)

    Storr-Paulsen, Allan; Nørregaard, Jens Christian; Børme, Kim Kamp;

    2009-01-01

    Abstract. Intraoperative floppy iris syndrome (IFIS) during cataract surgery is characterized by iris fluttering, iris prolapse towards the incisions, and a progressive pupillary constriction leading to high rates of complications. The syndrome has been reported following the treatment of benign...

  11. Estudio experimental del efecto de la terapia con Plasma Rico en Factores de Crecimiento sobre la reparación de lesiones musculares o tendinosas en la especie ovina

    OpenAIRE

    Aguilar García, Daniel

    2017-01-01

    Las lesiones músculo-tendinosas han experimentado un incremento progresivo en su frecuencia de aparición a lo largo de los últimos años, dando lugar a una incapacidad de forma temporal o incluso permanente para realizar la actividad física diaria en el individuo afectado. La rotura aguda completa del tendón de Aquiles es una patología muy grave, cuyo tratamiento supone una decisión difícil debido al bajo potencial de cicatrización que presenta el tejido tendinoso. Por otro lado...

  12. Papel de los grupos sulfhidrilos, las prostaglandinas y el óxido nítrico endógeno, en la gastroprotección del lanosterol sobre las lesiones gástricas inducidas por etanol en rata

    OpenAIRE

    Jesús Arrieta; Benito Reyes-Trejo; Adelfo Reyes-Ramírez; María Elena Sánchez-Mendoza

    2009-01-01

    En el presente trabajo se evaluó la actividad gastroprotectora del lanosterol sobre las lesiones gástricas inducidas por etanol en ratas. El lanosterol a las dosis de 3, 10, 30 y 100 mg/kg presentó un 26, 33, 51 y 59 % de gastroprotección, respectivamente. La gastroprotección fue atenuada por N-etilmaleimida (10 mg/kg, s.c.) lo que sugiere una participación de los grupos sulfhidrilos. Sin embargo, el efecto gastroprotector no fue afectado por el éster metílico de la NG-nitro L-arginina (70 mg...

  13. Un estudio a trav??s del sistema de casos resueltos: Los delitos de aborto y de causaci??n de lesiones al feto

    OpenAIRE

    2007-01-01

    El delito de aborto regulado en el T??tulo II del Libro II CP, protege la vida del producto de la concepci??n, mientras esta sea dependiente de la vida materna, por no haber tenido lugar aun su nacimiento.

  14. Effect of tamsulosin on iris vasculature and morphology.

    Science.gov (United States)

    Shtein, Roni M; Hussain, Munira T; Cooney, Theresa M; Elner, Victor M; Hood, Christopher T

    2014-05-01

    To determine whether preoperative iris vasculature and morphology are altered in patients who have taken tamsulosin (Flomax). Academic multispecialty practice. Case series. Patients with current or past tamsulosin use and age- and sex-matched control patients were included. Anterior segment optical coherence tomography (AS-OCT) and iris fluorescein angiography were performed to measure iris vasculature and thickness before cataract surgery. Data collected at surgery included pupil diameter, clinical signs of intraoperative floppy-iris syndrome, and surgical complications. Tamsulosin was currently used by 16 patients and in the past by 4 patients; the control group comprised 10 patients. Pharmacologically dilated pupil diameter was statistically significantly smaller preoperatively and immediately postoperatively in the tamsulosin group than in the control group (P=.009 and P=.003, respectively). There was a statistically significant decrease in pupil size intraoperatively in the tamsulosin group (P=.05) but not in the control group (P=.3). Iris-vasculature parameters, specifically time to first vessel fill and percentage of vessel fill on iris fluorescein angiography, were not significantly different between the 2 groups. The AS-OCT measurements of iris morphology were not statistically significantly different between the groups. No surgical complications occurred. No fluorescein dye leakage, staining, or other vascular anomalies were observed. Although there were differences in pupil measurements and intraoperative iris behavior between patients who had been on tamsulosin and control patients, there were no significant differences in iris vasculature on iris fluorescein angiography or in iris morphology on AS-OCT. Copyright © 2014 ASCRS and ESCRS. Published by Elsevier Inc. All rights reserved.

  15. Otras enfermedades periodontales: II: Lesiones endo-periodontales y condiciones y/o deformidades del desarrollo o adquiridas Other periodontal diseases: II. Endo-perio lesions and conditions and/or malformations developed or acquired

    Directory of Open Access Journals (Sweden)

    I. Sanz-Sánchez

    2008-04-01

    Full Text Available Introducción: En el último workshop en periodoncia, llevado a cabo por la asociación americana de periodoncia en 1999, se añadieron, entre otros, un grupo de lesiones y de condiciones que, por su prevalencia y por la imposibilidad de ser clasificados en otros grupos, debían ser tenidos en cuenta y analizados de un modo distinto para establecer un correcto diagnóstico diferencial. Los objetivos de este trabajo son: a Conocer el impacto de las lesiones endo-periodontales y ser capaces de realizar un correcto diagnóstico diferencial para poner en marcha la estrategia terapéutica oportuna; b Conocer las condiciones y deformidades que se pueden dar en los tejidos periodontales. Material, métodos y resultados: Para la realización de este trabajo se han analizado 17 artículos publicados en revistas científicas con índice de impacto internacional y otras de ámbito nacional. Para la búsqueda se han empleado la base de datos MEDLINE y Cochrane.Introduction: In the last workshop in periodontics of the American Association of Periodontology in 1999, different groups of lesions were added because of it high prevalence and the impossibility of classifying them in another group, in orther to perform a correct differential diagnose. The objectives of this paper are: a To know the impact of endo-perio lesions to make a correct differential diagnose and the best treatment strategy; b To know the conditions and malformations that can appear in the periodontal tissues. Materials, Methods and Results: For the preparation of this work, 17 articles published in international and national scientific journals have been analyzed. The MEDLINE and Cochrane databases have been used to make the search.

  16. The cellular and molecular biology of the iris, an overlooked tissue: the iris and pseudoexfoliation glaucoma.

    Science.gov (United States)

    Borrás, Terete

    2014-01-01

    Located between the cornea and the lens, the Iris is fully immersed in aqueous humor. During exfoliation syndrome, a disorder of the elastic fibers, an abnormal fibrillar material (XFM) is deposited on the anterior lens capsule underneath the pigment epithelium of the Iris. Release of this material to the aqueous humor reaches the trabecular meshwork where its presence is associated with elevated intraocular pressure. Ultrastructural studies suggest that the XFM material is produced by the lens capsule, lens epithelial and iris pigment epithelial cells (IPE). The involvement of the IPE in pseudoexfoliation glaucoma has not been extensively addressed. Immunohistochemistry studies have shown higher levels of LOXL1 and clusterin in the IPE extracellular space of specimens from exfoliation patients. But studies using IPE cells to understand the formation of the XFM in vitro and/or in vivo are scarce. A focus on the Iris and its IPE cells would be key for the elucidation of XFM and the understanding of the development of pseudoexfoliation glaucoma.

  17. An unusual case of seed dispersal in an invasive aquatic; yellow flag iris (Iris pseudacorus)

    Science.gov (United States)

    Understanding reproductive mode of invasive plants can help managers plan more efficacious control. Invasive aquatics typically reproduce primarily through vegetative means. Yellow flag iris is an invasive plant species often growing as an emergent aquatic. There have been contradictory reports of i...

  18. Are IRIS Bombs Connected to Ellerman Bombs?

    Science.gov (United States)

    Tian, Hui; Xu, Zhi; He, Jiansen; Madsen, Chad

    2016-06-01

    Recent observations by the Interface Region Imaging Spectrograph (IRIS) have revealed pockets of hot gas (˜2-8 × 104 K) potentially resulting from magnetic reconnection in the partially ionized lower solar atmosphere (IRIS bombs; IBs). Using joint observations between IRIS and the Chinese New Vacuum Solar Telescope, we have identified 10 IBs. We find that 3 are unambiguously and 3 others are possibly connected to Ellerman bombs (EBs), which show intense brightening of the extended {{{H}}}α wings without leaving an obvious signature in the {{{H}}}α core. These bombs generally reveal the following distinct properties: (1) the O iv 1401.156 Å and 1399.774 Å lines are absent or very weak; (2) the Mn i 2795.640 Å line manifests as an absorption feature superimposed on the greatly enhanced Mg ii k line wing; (3) the Mg ii k and h lines show intense brightening in the wings and no dramatic enhancement in the cores; (4) chromospheric absorption lines such as Ni ii 1393.330 Å and 1335.203 Å are very strong; and (5) the 1700 Å images obtained with the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory reveal intense and compact brightenings. These properties support the formation of these bombs in the photosphere, demonstrating that EBs can be heated much more efficiently than previously thought. We also demonstrate that the Mg ii k and h lines can be used to investigate EBs similarly to {{{H}}}α , which opens a promising new window for EB studies. The remaining four IBs obviously have no connection to EBs and they do not have the properties mentioned above, suggesting a higher formation layer, possibly in the chromosphere.

  19. CFD modeling of the IRIS pressurizer dynamic

    Energy Technology Data Exchange (ETDEWEB)

    Sanz, Ronny R.; Montesinos, Maria E.; Garcia, Carlos; Bueno, Elizabeth D.; Mazaira, Leorlen R., E-mail: rsanz@instec.cu, E-mail: mmontesi@instec.cu, E-mail: cgh@instec.cu, E-mail: leored1984@gmail.com [Instituto Superior de Tecnologias y Ciencias Aplicadas (InSTEC), La Habana (Cuba); Bezerra, Jair L.; Lira, Carlos A.B. Oliveira, E-mail: jair.lima@ufpe.br, E-mail: cabol@ufpe.br [Universida Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Energia Nuclear

    2015-07-01

    Integral layout of nuclear reactor IRIS makes possible the elimination of the spray system, which is usually used to mitigate in-surge transient and also help to Boron homogenization. The study of transients with deficiencies in the Boron homogenization in this technology is very important, because they can cause disturbances in the reactor power and insert a strong reactivity in the core. The detailed knowledge of the behavior of multiphase multicomponent flows is challenging due to the complex phenomena and interactions at the interface. In this context, the CFD modeling is employed in the design of equipment in the nuclear industry as it allows predicting accidents or predicting their performance in dissimilar applications. The aim of the present research is to model the IRIS pressurizer's dynamic using the commercial CFD code CFX. A symmetric tri dimensional model equivalent to 1/8 of the total geometry was adopted to reduce mesh size and minimize processing time. The model considers the coexistence of four phases and also takes into account the heat losses. The relationships for interfacial mass, energy, and momentum transport are programmed and incorporated into CFX. Moreover, two subdomains and several additional variables are defined to monitoring the boron dilution sequences and condensation-evaporation rates in different control volumes. For transient states a non - equilibrium stratification in the pressurizer is considered. This paper discusses the model developed and the behavior of the system for representative transients sequences. The results of analyzed transients of IRIS can be applied to the design of pressurizer internal structures and components. (author)

  20. Isolated Bilateral Congenital Iris Sphincter Agenesis

    Directory of Open Access Journals (Sweden)

    Aparna Rao

    2011-01-01

    Full Text Available Purpose. We herein report a patient with bilateral congenital total iris sphincter agenesis with no other abnormality detected on systemic examination. Methods. A 24-year-old laborer presented to us for a routine checkup with complaint of photophobia and inability to work under sunlight. Examination revealed bilateral absence of sphincter and 6.5 mm pupil in both eyes in the undilated state. Results. Accommodation was poor in both eyes. Systemic examination was within normal limits. He was prescribed bifocal photochromic glasses for constant wear. Conclusions. Congenital sphincter agenesis can occur in an isolated form without systemic abnormalities which can be managed conservatively.

  1. IRIS Toxicological Review of Acrylamide (External Review ...

    Science.gov (United States)

    EPA has conducted a peer review by EPA’s Science Advisory Board (SAB) of the scientific basis supporting the human health hazard and dose-response assessment of acrylamide that once finalized will appear on the Integrated Risk Information System (IRIS) database. Peer review is meant to ensure that the science is used credibly and appropriately in derivation of the dose-response assessments and toxicological characterization. The draft Toxicological Review of Acrylamide provides scientific support and rationale for the hazard identification and dose-response assessment pertaining to a chronic exposure to acrylamide.

  2. Frontal view reconstruction for iris recognition

    Energy Technology Data Exchange (ETDEWEB)

    Santos-Villalobos, Hector J; Bolme, David S; Boehnen, Chris Bensing

    2015-02-17

    Iris recognition can be accomplished for a wide variety of eye images by correcting input images with an off-angle gaze. A variety of techniques, from limbus modeling, corneal refraction modeling, optical flows, and genetic algorithms can be used. A variety of techniques, including aspherical eye modeling, corneal refraction modeling, ray tracing, and the like can be employed. Precomputed transforms can enhance performance for use in commercial applications. With application of the technologies, images with significantly unfavorable gaze angles can be successfully recognized.

  3. Frontal view reconstruction for iris recognition

    Science.gov (United States)

    Santos-Villalobos, Hector J; Bolme, David S; Boehnen, Chris Bensing

    2015-02-17

    Iris recognition can be accomplished for a wide variety of eye images by correcting input images with an off-angle gaze. A variety of techniques, from limbus modeling, corneal refraction modeling, optical flows, and genetic algorithms can be used. A variety of techniques, including aspherical eye modeling, corneal refraction modeling, ray tracing, and the like can be employed. Precomputed transforms can enhance performance for use in commercial applications. With application of the technologies, images with significantly unfavorable gaze angles can be successfully recognized.

  4. Evaluación del módulo de elasticidad de materiales estéticos para la restauración de lesiones cervicales Assessment of the elasticity module of aesthetic materials for restoration of cervical lesions

    Directory of Open Access Journals (Sweden)

    Claudia Estela Bonnin

    2012-06-01

    Full Text Available La pérdida de tejido en la zona cervical ha sido atribuida principalmente a la erosión y abrasión producidas por el cepillo de dientes. El rol de las fuerzas oclusales es un factor muy importante a tener en cuenta en el desarrollo y avance de estas lesiones cervicales no cariosas. Distinguir las diferentes propiedades mecánicas y sobre todo el módulo de elasticidad de los materiales estéticos utilizados para la restauración de este tipo de lesiones, permitirá una sobrevida mayor de las obturaciones y una gran mejoría en el tratamiento de nuestros pacientes. El objetivo de este trabajo fue evaluar el módulo de elasticidad de 6 materiales restauradores estéticos. Siguiendo la norma ISO 4049 se confeccionaron 10 probetas de cada material experimental. Se empleó el ensayo de flexión de 3 puntos con una INSTRON 4486. De la relación numérica entre los valores de tensión (T y deformación (D, se obtuvo el módulo de elasticidad o de Young (E, para cada material experimental. El análisis de varianza mostró diferencias significativas (p Te loss of tissue in the cervical zone has been attributed to the erosion and abrasion provoked by toothbrush. The role of occlusal forces is a very important factor to be taken into account in the development and advance of these carious non-cervical lesions. To distinguish the different mechanical properties and mainly the elasticity module of aesthetic material used for repair of this type of lesion, will allows a great survival of the obturations and in large extent in the treatment of our patients. The aim of present paper was to assess the elasticity module of 6 esthetic restoring materials. Following the ISO 4049 rule 10 test tubes of ach experimental material. A flexion assay of 3 points with INSTRON 4486 was used. From the numerical relation among the tension values (T and deformation (D we obtained the elasticity or Young (E elasticity module for each experimental material. The variance

  5. Detección del virus del papiloma humano de alto riesgo por captura híbrida II® según hallazgos citológicos en mujeres tratadas por lesiones escamosas intraepiteliales de cuello uterino, período 2006/2010 Detection of high risk human papillomavirus by hybrid capture II(r) according cytological findings in women treated for squamous intraepithelial lesions of the cervix, period 2006/2010

    OpenAIRE

    Pamela Mongelós; Malvina Páez; Isabel Rodriguez-Riveros; Graciela Giménez; Amalia Castro; Laura Mendoza

    2013-01-01

    OBJETIVO: Determinar la frecuencia del virus de papiloma humano de alto riesgo oncogénico (HR-HPV) por captura híbrida II (r) (CH II(r)) según hallazgos citológicos en mujeres tratadas por lesiones escamosas intraepiteliales (SIL) de cuello uterino. MATERIAL Y MÉTODO: Estudio descriptivo de corte transverso de una serie de casos, en donde se incluyeron 122 mujeres tratadas, 79 (65%) por SIL de bajo grado (LSIL) y 43 (35%) por SIL de alto grado (HSIL) que concurri...

  6. The IRIS network site at the Wilcox Solar Observatory

    Science.gov (United States)

    Hoeksema, J. T.; Scherrer, P. H.

    1991-01-01

    The site for the International Research on the Interior of the Sun (IRIS) instrument housed at the Wilcox Solar Observatory at Stanford University (near San Francisco, USA) is described together with the instrument operation procedure. The IRIS instrument, which measures global oscillations of the sun, operates continuously every clear day since it was installed in August 1987.

  7. IRIS Toxicological Review of Methyl Ethyl Ketone (2003 Final)

    Science.gov (United States)

    EPA announced the release of the final report, Toxicological Review of Methyl Ethyl Ketone: in support of the Integrated Risk Information System (IRIS). The updated Summary for Methyl Ethyl Ketone and accompanying toxicological review have been added to the IRIS Database....

  8. Iris Recognition for Partially Occluded Images: Methodology and Sensitivity Analysis

    Science.gov (United States)

    Poursaberi, A.; Araabi, B. N.

    2006-12-01

    Accurate iris detection is a crucial part of an iris recognition system. One of the main issues in iris segmentation is coping with occlusion that happens due to eyelids and eyelashes. In the literature, some various methods have been suggested to solve the occlusion problem. In this paper, two different segmentations of iris are presented. In the first algorithm, a circle is located around the pupil with an appropriate diameter. The iris area encircled by the circular boundary is used for recognition purposes then. In the second method, again a circle is located around the pupil with a larger diameter. This time, however, only the lower part of the encircled iris area is utilized for individual recognition. Wavelet-based texture features are used in the process. Hamming and harmonic mean distance classifiers are exploited as a mixed classifier in suggested algorithm. It is observed that relying on a smaller but more reliable part of the iris, though reducing the net amount of information, improves the overall performance. Experimental results on CASIA database show that our method has a promising performance with an accuracy of 99.31%. The sensitivity of the proposed method is analyzed versus contrast, illumination, and noise as well, where lower sensitivity to all factors is observed when the lower half of the iris is used for recognition.

  9. Iris-based medical analysis by geometric deformation features.

    Science.gov (United States)

    Ma, Lin; Zhang, D; Li, Naimin; Cai, Yan; Zuo, Wangmeng; Wang, Kuanguan

    2013-01-01

    Iris analysis studies the relationship between human health and changes in the anatomy of the iris. Apart from the fact that iris recognition focuses on modeling the overall structure of the iris, iris diagnosis emphasizes the detecting and analyzing of local variations in the characteristics of irises. This paper focuses on studying the geometrical structure changes in irises that are caused by gastrointestinal diseases, and on measuring the observable deformations in the geometrical structures of irises that are related to roundness, diameter and other geometric forms of the pupil and the collarette. Pupil and collarette based features are defined and extracted. A series of experiments are implemented on our experimental pathological iris database, including manual clustering of both normal and pathological iris images, manual classification by non-specialists, manual classification by individuals with a medical background, classification ability verification for the proposed features, and disease recognition by applying the proposed features. The results prove the effectiveness and clinical diagnostic significance of the proposed features and a reliable recognition performance for automatic disease diagnosis. Our research results offer a novel systematic perspective for iridology studies and promote the progress of both theoretical and practical work in iris diagnosis.

  10. The FDSN Archive at the IRIS Data Management Center

    Directory of Open Access Journals (Sweden)

    T. Ahern

    1994-06-01

    Full Text Available In August of 1990, the IRIS Data Management Center (IRIS DMC was designated as the first FDSN Data Center. Since that time the IRIS DMC has also come to be known as the FDSN Archive. As the FDSN Archive, all member networks, through their own local Network Data Centers, routinely send data to the IRIS DMC. At the present time we have received data from seven member networks. These include: CNSN (Canada; CDSN (China; GEOSCOPE (France; Graefenberg (Germany; IRIS GSN (U.S.A.; MEDNET (Italy; POSEIDON (Japan. In addition to acting as the FDSN Archive, the IRIS DMC is responsible for archiving and distributing data from several sources. The Global Seismographie Network (GSN and the Program for Array Seismic Studies of the Continental Lithosphere (PASSCAL and the Joint Seismic Program (JSP are three IRIS programs that presently send data to the IRIS DMS. The DMC also archives data from some regional networks in the United States and in the Former Soviet Union (FSU. The DMC is one component of a larger Data Management System (DMS consisting of several components including two Data Collection Centers (DCCs, one Data Management Center (DMQ, a DMC Host at the University of Washington, a Wave form Quality Center (WQC, and the Moscow Data Analysis Center (MDC in Russia.

  11. Iris Recognition for Partially Occluded Images: Methodology and Sensitivity Analysis

    Directory of Open Access Journals (Sweden)

    A. Poursaberi

    2007-01-01

    Full Text Available Accurate iris detection is a crucial part of an iris recognition system. One of the main issues in iris segmentation is coping with occlusion that happens due to eyelids and eyelashes. In the literature, some various methods have been suggested to solve the occlusion problem. In this paper, two different segmentations of iris are presented. In the first algorithm, a circle is located around the pupil with an appropriate diameter. The iris area encircled by the circular boundary is used for recognition purposes then. In the second method, again a circle is located around the pupil with a larger diameter. This time, however, only the lower part of the encircled iris area is utilized for individual recognition. Wavelet-based texture features are used in the process. Hamming and harmonic mean distance classifiers are exploited as a mixed classifier in suggested algorithm. It is observed that relying on a smaller but more reliable part of the iris, though reducing the net amount of information, improves the overall performance. Experimental results on CASIA database show that our method has a promising performance with an accuracy of 99.31%. The sensitivity of the proposed method is analyzed versus contrast, illumination, and noise as well, where lower sensitivity to all factors is observed when the lower half of the iris is used for recognition.

  12. Unconstrained Iris Acquisition and Recognition Using COTS PTZ Camera

    Directory of Open Access Journals (Sweden)

    Venugopalan Shreyas

    2010-01-01

    Full Text Available Abstract Uniqueness of iris patterns among individuals has resulted in the ubiquity of iris recognition systems in virtual and physical spaces, at high security facilities around the globe. Traditional methods of acquiring iris patterns in commercial systems scan the iris when an individual is at a predetermined location in front of the scanner. Most state-of-the-art techniques for unconstrained iris acquisition in literature use expensive custom equipment and are composed of a multicamera setup, which is bulky, expensive, and requires calibration. This paper investigates a method of unconstrained iris acquisition and recognition using a single commercial off-the-shelf (COTS pan-tilt-zoom (PTZ camera, that is compact and that reduces the cost of the final system, compared to other proposed hierarchical multicomponent systems. We employ state-of-the-art techniques for face detection and a robust eye detection scheme using active shape models for accurate landmark localization. Additionally, our system alleviates the need for any calibration stage prior to its use. We present results using a database of iris images captured using our system, while operating in an unconstrained acquisition mode at 1.5 m standoff, yielding an iris diameter in the 150–200 pixels range.

  13. Eclipse-Free-Time Assessment Tool for IRIS

    Science.gov (United States)

    Eagle, David

    2012-01-01

    IRIS_EFT is a scientific simulation that can be used to perform an Eclipse-Free- Time (EFT) assessment of IRIS (Infrared Imaging Surveyor) mission orbits. EFT is defined to be those time intervals longer than one day during which the IRIS spacecraft is not in the Earth s shadow. Program IRIS_EFT implements a special perturbation of orbital motion to numerically integrate Cowell's form of the system of differential equations. Shadow conditions are predicted by embedding this integrator within Brent s method for finding the root of a nonlinear equation. The IRIS_EFT software models the effects of the following types of orbit perturbations on the long-term evolution and shadow characteristics of IRIS mission orbits. (1) Non-spherical Earth gravity, (2) Atmospheric drag, (3) Point-mass gravity of the Sun, and (4) Point-mass gravity of the Moon. The objective of this effort was to create an in-house computer program that would perform eclipse-free-time analysis. of candidate IRIS spacecraft mission orbits in an accurate and timely fashion. The software is a suite of Fortran subroutines and data files organized as a "computational" engine that is used to accurately predict the long-term orbit evolution of IRIS mission orbits while searching for Earth shadow conditions.

  14. Opening of Iris flowers is regulated by endogenous auxins

    NARCIS (Netherlands)

    Doorn, van W.G.; Dole, I.; Celikel, F.G.; Harkema, H.

    2013-01-01

    Flower opening in Iris (Iris x hollandica) requires elongation of the pedicel and ovary. This moves the floral bud upwards, thereby allowing the tepals to move laterally. Flower opening is requires with elongation of the pedicel and ovary. In cv. Blue Magic, we investigated the possible role of horm

  15. Delay of Iris flower senescence by cytokinins and jasmonates

    NARCIS (Netherlands)

    Doorn, van W.G.; Celikel, F.G.; Pak, C.; Harkema, H.

    2013-01-01

    It is not known whether tepal senescence in Iris flowers is regulated by hormones. We applied hormones and hormone inhibitors to cut flowers and isolated tepals of Iris x hollandica cv. Blue Magic. Treatments with ethylene or ethylene antagonists indicated lack of ethylene involvement. Auxins or aux

  16. A Novel and Efficient Method for Iris Automatic Location

    Institute of Scientific and Technical Information of China (English)

    XU Guang-zhu; ZHANG Zai-feng; MA Yi-de

    2007-01-01

    An efficient and robust iris location algorithm plays a very important role in a real iris recognition system. A novel and efficient iris automatic location method is presented in this study. It includes following two steps mainly: pupil location and iris outer boundary location. A digital eye image was divided into many small rectangular blocks with fixed size in the pupil location, and the block with the smallest average intensity was selected as a reference area. Then image binarization was implemented taking the average intensity of the reference area as a threshold. At last the center coordinates and radius of pupil were estimated by extending the reference area to the pupil's boundaries in the binary iris image. In the iris outer location, two local parts of the eye image were selected and transformed into polar coordinates from Cartesian reference. In order to detect the fainter outer boundary of the iris quickly, a novel edge detector was used to locate boundaries of the two parts. The center coordinates and radius of the iris outer boundary can be estimated using the fusion of the locating results of the two local parts and the location information of the pupil. The algorithm was tested on CASIA v1.0 and MMU v1.0 digital eye image databases and experimental results show that the proposed method has satisfying performance and good robustness.

  17. Delay of Iris flower senescence by cytokinins and jasmonates

    NARCIS (Netherlands)

    Doorn, van W.G.; Celikel, F.G.; Pak, C.; Harkema, H.

    2013-01-01

    It is not known whether tepal senescence in Iris flowers is regulated by hormones. We applied hormones and hormone inhibitors to cut flowers and isolated tepals of Iris x hollandica cv. Blue Magic. Treatments with ethylene or ethylene antagonists indicated lack of ethylene involvement. Auxins or

  18. Reproducibilidad del diagnóstico histopatológico de lesiones precursoras del carcinoma gástrico en tres países latinoamericanos Reproducibility of histopathologic diagnosis of precursor lesions of gastric carcinoma in three Latin American countries

    Directory of Open Access Journals (Sweden)

    Elena Kasamatsu

    2010-10-01

    Full Text Available Objetivo. Evaluar la concordancia en el diagnóstico de lesiones precursoras del carcinoma gástrico de tipo intestinal entre observadores con diferente experiencia. Material y métodos. Se estudiaron 1 056 casos de biopsias gástricas: 341 de Colombia, 382 de México y 333 de Paraguay. En el diagnóstico de cada caso participaron patólogos sin experiencia en patología gastrointestinal (A, patólogos con experiencia en patología gastrointestinal (B y expertos que trabajan en un centro de referencia internacional (C. Resultados. La concordancia (k entre patólogos inexpertos y expertos fue pobre en el diagnóstico de gastritis atrófica (k=0.04 a 0.12 y displasia (k=0.11 a 0.05 y buena en el diagnóstico de metaplasia intestinal (k=0.52 a 0.58; la supervisión de un patólogo inexperto por un experto mejoró notablemente la concordancia en el diagnóstico de gastritis atrófica (k=0.65 y metaplasia intestinal (k=0.91 y, en un menor grado, de displasia (k=0.28. Al comparar la concordancia entre expertos antes y después de la reunión de consenso no hubo variación en el diagnóstico de gastritis atrófica (k=0.57; la concordancia varió de buena a excelente en el de metaplasia intestinal (k=0.67 a 0.81 y de pobre a buena en el de displasia (k=0.18 a 0.66. Conclusión. Los principales problemas se presentan en el diagnóstico de la gastritis crónica atrófica y la displasia. La concordancia interobservador depende de la experiencia del observador y la lectura de consenso.Objective. The aim was to evaluate the concordance in the diagnosis of precursor lesions of intestinal-type gastric carcinoma among observers with different levels of experience. Material and Methods. Gastric biopsies from 1 056 cases were studied: 341 from Colombia, 382 from Mexico, and 333 from Paraguay. Pathologists without experience (A and with experience (B in gastrointestinal pathology, as well as experts working in an international reference center (C participated in

  19. Iris Matching Based On a Stack Like Structure Graph Approach

    Directory of Open Access Journals (Sweden)

    Roushdi Mohamed FAROUK

    2012-12-01

    Full Text Available In this paper, we present the elastic bunch graph matching as a new approach for iris recognition. The task is difficult because of iris variation in terms of position, size, and partial occlusion. We have used the circular Hough transform to determine the iris boundaries. Individual segmented irises are represented as labeled graphs. We have combined a representative set of individual model graphs into a stack like structure called an iris bunch graph (IBG. Finally, a bunch graph similarity function is proposed to compare a test graph with the IBG. Recognition results are given for galleries of irises from CASIA version and UBIRIS databases. The numerical results show that, the elastic bunch graph matching is an effective technique for iris matching. We also compare our results with previous results and find that, the elastic bunch graph matching is an effective matching performance.

  20. Investigation on Optimization in Segmentation Phase of Iris Recognition

    Directory of Open Access Journals (Sweden)

    Selvamuthukumaran Shanmugam

    2010-01-01

    Full Text Available In a progressively more digital society, the demandfor secure identification has led to amplified development ofbiometric systems. Iris biometric systems are becoming widelyadopted and accepted as one of the most effective ways topositively identify people. In this paper, the Segmentation phasesof Iris recognition has been examined. The performance of theSegmentation phase could be amplified by the proposedoptimization technique- Optimized Iris Segmentation using SobelEdge Detection. By the proposed method, the overall rank-onerecognition rate of 90% is being achieved which is much betterthan reported accuracies for iris recognition in the literature.Also the proposed approach makes the overall iris recognitionsystem performance by the improvement factor of 10 fold as well.

  1. Los diferentes actores del conflicto

    OpenAIRE

    Consani, Norberto E.

    1991-01-01

    Los acontecimientos del Medio Oriente es el resultado de la acción de un país o de conyunturas históricas y geopolíticas complejas en las cuales varios actores juegan su rol? Nosotros vamos a analizar el comportamiento de algunos actores, individual y colectivamente para intentar tener una mejor comprensión del conflicto. Instituto de Relaciones Internacionales (IRI)

  2. Tuning Iris Recognition for Noisy Images

    Science.gov (United States)

    Ferreira, Artur; Lourenço, André; Pinto, Bárbara; Tendeiro, Jorge

    The use of iris recognition for human authentication has been spreading in the past years. Daugman has proposed a method for iris recognition, composed by four stages: segmentation, normalization, feature extraction, and matching. In this paper we propose some modifications and extensions to Daugman's method to cope with noisy images. These modifications are proposed after a study of images of CASIA and UBIRIS databases. The major modification is on the computationally demanding segmentation stage, for which we propose a faster and equally accurate template matching approach. The extensions on the algorithm address the important issue of pre-processing, that depends on the image database, being mandatory when we have a non infra-red camera, like a typical WebCam. For this scenario, we propose methods for reflection removal and pupil enhancement and isolation. The tests, carried out by our C# application on grayscale CASIA and UBIRIS images, show that the template matching segmentation method is more accurate and faster than the previous one, for noisy images. The proposed algorithms are found to be efficient and necessary when we deal with non infra-red images and non uniform illumination.

  3. Pigment Melanin: Pattern for Iris Recognition

    CERN Document Server

    Hosseini, Mahdi S; Soltanian-Zadeh, Hamid

    2009-01-01

    Recognition of iris based on Visible Light (VL) imaging is a difficult problem because of the light reflection from the cornea. Nonetheless, pigment melanin provides a rich feature source in VL, unavailable in Near-Infrared (NIR) imaging. This is due to biological spectroscopy of eumelanin, a chemical not stimulated in NIR. In this case, a plausible solution to observe such patterns may be provided by an adaptive procedure using a variational technique on the image histogram. To describe the patterns, a shape analysis method is used to derive feature-code for each subject. An important question is how much the melanin patterns, extracted from VL, are independent of iris texture in NIR. With this question in mind, the present investigation proposes fusion of features extracted from NIR and VL to boost the recognition performance. We have collected our own database (UTIRIS) consisting of both NIR and VL images of 158 eyes of 79 individuals. This investigation demonstrates that the proposed algorithm is highly s...

  4. CODIFICACIÓN DE LAS CAUSAS DE MUERTE CON EL SOFTWARE IRIS. IMPACTO EN LAS ESTADÍSTICAS DE MORTALIDAD DE LA COMUNIDAD FORAL DE NAVARRA

    Directory of Open Access Journals (Sweden)

    Yugo Floristán Floristán

    2016-01-01

    Full Text Available Fundamentos: Existen pocos estudios que analicen los cambios en las estadísticas de mortalidad derivados de la utilización del software IRIS para la codificación automática de la causa de muerte en comparación a la codificación manual. El objetivo de esta investigación fue evaluar el impacto del uso de IRIS en las estadísticas de mortalidad de Navarra. Métodos: Se procedió a una doble codificación de la causa básica de 5.060 boletines de defunción correspondientes a los fallecimientos de residentes en Navarra en 2014. Se establecieron las correspondencias entre ambas codificaciones para los capítulos de la CIE10 y la lista de causas INE-102 y se estimó el cambio en las tasas de mortalidad. Resultados: Con el software IRIS se codificaron automáticamente el 90% de las defunciones. Se observó una coincidencia a 4 caracteres y en el mismo capítulo de la CIE10 en el 79,1 y el 92,0% de los casos. La coincidencia para la lista reducida INE-102 fue del 88,3%. Se encontraron coincidencias más elevadas en las defunciones de personas menores de 65 años. Se observó un incremento de las muertes por enfermedades endocrinas (31%, trastornos mentales (19% y enfermedades del sistema nervioso (9%, mientras que diminuyeron las enfermedades del sistema genitourinario (21%. Conclusiones: La coincidencia a nivel de los capítulos de CIE10 de la codificación con IRIS respecto a la manual se da en 9 de cada 10 defunciones. La implantación de IRIS comporta un incremento de las enfermedades endocrinas, fundamentalmente diabetes mellitus e hiperlipidemias, y de los trastornos mentales, fundamentalmente las demencias.

  5. Lesiones frecuentes en atletas profesionales

    OpenAIRE

    Doyel, Crevecoer

    2015-01-01

    Durante la práctica del atletismo frecuentemente ocurren lesiones, afectando principalmente a los miembros inferiores. Las causas que las originan son muy diversas y tienen diferentes características de acuerdo al tipo de modalidad realizada dentro del atletismo. Objetivo: Analizar las características de las lesiones más frecuentes en miembros inferiores, en atletas corredores profesionales, de diferentes distancias, de ambos sexos, de entre 18 y 40 años de edad, que practican atletismo en...

  6. Lesiones frecuentes en atletas profesionales

    OpenAIRE

    Doyel, Crevecoer

    2015-01-01

    Durante la práctica del atletismo frecuentemente ocurren lesiones, afectando principalmente a los miembros inferiores. Las causas que las originan son muy diversas y tienen diferentes características de acuerdo al tipo de modalidad realizada dentro del atletismo. Objetivo: Analizar las características de las lesiones más frecuentes en miembros inferiores, en atletas corredores profesionales, de diferentes distancias, de ambos sexos, de entre 18 y 40 años de edad, que practican atletismo en...

  7. Evaluación del módulo de elasticidad de materiales estéticos para la restauración de lesiones cervicales

    OpenAIRE

    Claudia Estela Bonnin; María del Carmen Urquia Morales

    2012-01-01

    La pérdida de tejido en la zona cervical ha sido atribuida principalmente a la erosión y abrasión producidas por el cepillo de dientes. El rol de las fuerzas oclusales es un factor muy importante a tener en cuenta en el desarrollo y avance de estas lesiones cervicales no cariosas. Distinguir las diferentes propiedades mecánicas y sobre todo el módulo de elasticidad de los materiales estéticos utilizados para la restauración de este tipo de lesiones, permitirá una sobrevida mayor de las obtura...

  8. Síndrome disejecutivo en pacientes con lesiones cerebrales no frontales. Evidencias empíricas obtenidas con la aplicación del WCST.

    OpenAIRE

    Hansel Soto Hernández; Eduardo Cairo Valcárcel; Mayela Marrero Alino; Eduardo González Alemañy

    2016-01-01

    En la presente investigación el objetivo fue evaluar el impacto que tienen las lesiones tumorales no frontales sobre las funciones ejecutivas. Se analizó el rendimiento en el test de WCST de un grupo experimental de pacientes con tumores cerebrales no frontales (n=30), y se comparó con dos grupos controles. El grupo control (1), conformado por pacientes con lesiones tumorales frontales (n=15), y el grupo control (2), por sujetos normales (n=40). Ambos grupos clínicos pertenecieron al servicio...

  9. Dosimetric comparison between cone/Iris-based and InCise MLC-based CyberKnife plans for single and multiple brain metastases.

    Science.gov (United States)

    Jang, Si Young; Lalonde, Ron; Ozhasoglu, Cihat; Burton, Steven; Heron, Dwight; Huq, M Saiful

    2016-09-08

    We performed an evaluation of the CyberKnife InCise MLC by comparing plan qualities for single and multiple brain lesions generated using the first version of InCise MLC, fixed cone, and Iris collimators. We also investigated differences in delivery efficiency among the three collimators. Twenty-four patients with single or multiple brain mets treated previously in our clinic on a CyberKnife M6 using cone/Iris collimators were selected for this study. Treatment plans were generated for all lesions using the InCise MLC. Number of monitor units, delivery time, target coverage, conformity index, and dose falloff were compared between MLC- and clinical cone/Iris-based plans. Statistical analysis was performed using the non-parametric Wilcoxon-Mann-Whitney signed-rank test. The planning accuracy of the MLC-based plans was validated using chamber and film measurements. The InCise MLC-based plans achieved mean dose and target coverage comparable to the cone/Iris-based plans. Although the conformity indices of the MLC-based plans were slightly higher than those of the cone/Iris-based plans, beam delivery time for the MLC-based plans was shorter by 30% ~ 40%. For smaller targets or cases with OARs located close to or abutting target volumes, MLC-based plans provided inferior dose conformity compared to cone/Iris-based plans. The QA results of MLC-based plans were within 5% absolute dose difference with over 90% gamma passing rate using 2%/2 mm gamma criteria. The first version of InCise MLC could be a useful delivery modality, especially for clinical situations for which delivery time is a limiting factor or for multitarget cases. © 2016 The Authors.

  10. Barumiki antocyjanowe u Iris germanica [Anthocyanin pigments in Iris germanica L.

    Directory of Open Access Journals (Sweden)

    J. Szczepańska

    2015-06-01

    Full Text Available Anthocyanin pigments occurring in the flowers of Iris germanica were investigated in five varieties: Rota, Wedgewood, Empress of India, Deputate Nomblot and Joanna. The relation between the colour of the flower and the amount of the pigment was studied. The pigments were extracted from the dry plant material with 1% hydrochloric acid in methanol. Paper chromatography and colorimetric determinations were used for identification of the pigments and their quantitative determination. The results allow the following conclusions: 1. The varieties investigated were characterized toy the occurrence of delphinidine glycoside; 2. The colour intensity is dependent on the anthocyanin pigments; 3. The colour spectrum of Iris sp. flowersis greatly extended by yellow copigments.

  11. CORRELACIÓN CITOHISTOLÓGICA DE LESIONES ESCAMOSAS INTRAEPITELIALES DE CUELLO UTERINO, EN LA UNIDAD DE PATOLOGÍA CERVICAL DEL HOSPITAL NAVAL DE TALCAHUANO

    OpenAIRE

    2005-01-01

    Objetivo: Evaluar la calidad del laboratorio de citología cervical para LIE de bajo y alto grado del Hospital Naval de Talcahuano a través de la correlación citohistológica. Material y Método: Estudio retrospectivo, descriptivo y analítico. Se revisaron 422 historias clínicas de pacientes ingresadas a la Unidad de Patología Cervical (UPC) del Hospital Naval de Talcahuano, en el período 1994-2004. En 204 casos hubo citología positiva para LIE, 83,3% tenían una biopsia bajo visión colposcópica,...

  12. Drawing up an individual risk index for development of metachronous neoplastic lesions in resected colorectal cancer Elaboración de un índice individual del riesgo para el desarrollo de lesiones neoplásicas metacrónicas en el cáncer colorrectal resecado

    Directory of Open Access Journals (Sweden)

    Ana Borda

    2012-06-01

    Full Text Available Aim: to identify possible risk factors for the development of metachronous lesions in colorectal cancer (CRC which would allow to establish a post-surgical individual prognostic index. Patients and methods: three hundred eighty-two surgically treated CRC were reviewed. We compared the incidence of metachronous lesions in 40 variables concerning patient clinical data and initial neoplastic findings. An individual risk index for metachronicity was drawn up including those variables which presented significant differences in multivariate logistic regression, dividing patients into three groups. Results: variables with prognostic value for metachronicity were distal cancer location: OR= 2.30 (1.03-5.13, alcohol intake: OR = 2.20 (1.08-4.48, presence of synchronous adenomas: isolated: OR = 2.47 (1.03-4.48, multiple: OR = 4.26 (1.78-10.17, and presence of synchronous advanced adenoma: OR= 2.91 (1.52-12.60. Tumor MUC-5 expression proved to have a protective role: OR = 0.23 (0.08-0.66. An individual risk score was established considering these variables and patients could be classified into three groups, with a discrimination power for metachronicity of pObjetivo: identificar posibles factores de riesgo para desarrollar lesiones metacrónicas en el cáncer colorrectal, elaborando un índice pronóstico individual del riesgo. Material y métodos: revisamos 382 cánceres colorrectales resecados. Comparamos la diferente incidencia de lesiones metacrónicas en 40 variables referentes al paciente y a las lesiones neoplásicas iniciales. Con aquellas que mostraron diferencias significativas en el análisis estadístico multivariable, elaboramos un índice individual de riesgo, clasificando los pacientes en 3 grupos de riesgo de metacronicidad. Resultados: las variables con valor pronóstico para la metacronicidad fueron: localización distal del cáncer: OR = 2,30 IC 95% (1,03-5,13; consumo de alcohol: OR = 2,20 IC 95% (1,08-4,48; presencia de adenoma sincr

  13. Iris detection based on pupil prospect point and horizontal projections

    Science.gov (United States)

    Shahid, Muhammad; Nawaz, Tabassam

    2010-02-01

    Iris is one of the most discriminating human physiological traits being used for personal human identification. The success of iris based system is highly relied on the accurately captured and precisely segmented iris image. False rejection rate has been a major challenge in the success of such system which primarily results from inaccurate iris segmentation. Most of the presented algorithms on iris segmentation considers pupil as perfect circle. However, according to observation this is not true in all the cases. In addition, a little angular shift in position of subject iris can further deteriorate the performance of algorithms based on circular assumption. To improve the quality of segmentation, an effective algorithm is proposed for iris segmentation which takes into consideration issues related to irregular pupil boundary as well as computation intensive nature of the prevailing algorithms. Contrary to all the previous approaches, the proposed algorithm is based on detection of pupil prospect point within the pupil region and utilizes bi-directional horizontal projections and distance parameters to detect the pupillary as well as limbus boundaries. The processing involved is linear in nature. Simulation of the proposed algorithm is done in Matlab.

  14. A simple shape prior model for iris image segmentation

    Science.gov (United States)

    Bishop, Daniel A.; Yezzi, Anthony, Jr.

    2011-06-01

    In order to make biometric systems faster and more user-friendly, lower-quality images must be accepted. A major hurdle in this task is accurate segmentation of the boundaries of the iris in these images. Quite commonly, circle-fitting is used to approximate the boundaries of the inner (pupil) and outer (limbic) boundaries of the iris, but this assumption does not hold for off-axis or otherwise non-circular boundaries. In this paper we present a novel, foundational method for elliptical segmentation of off-axis iris images. This method uses active contours with constrained flow to achieve a simplified form of shape prior active contours. This is done by calculating a region-based contour evolution and projecting it upon a properly chosen set of vectors to confine it to a class of shapes. In this case, that class of shapes is ellipses. This serves to regularize the contour, simplifying the curve evolution and preventing the development of irregularities that present challenges in iris segmentation. The proposed method is tested using images from the UBIRIS v.1 and CASIA-IrisV3 image data sets, with both near-ideal and off-axis images. Additional testing has been performed using the WVU Off Axis/Angle Iris Dataset, Release 1. By avoiding many of the assumptions commonly used in iris segmentation methods, the proposed method is able to accurately fit elliptical boundaries to off-axis images.

  15. Evaluating the impact of image preprocessing on iris segmentation

    Directory of Open Access Journals (Sweden)

    José F. Valencia-Murillo

    2014-08-01

    Full Text Available Segmentation is one of the most important stages in iris recognition systems. In this paper, image preprocessing algorithms are applied in order to evaluate their impact on successful iris segmentation. The preprocessing algorithms are based on histogram adjustment, Gaussian filters and suppression of specular reflections in human eye images. The segmentation method introduced by Masek is applied on 199 images acquired under unconstrained conditions, belonging to the CASIA-irisV3 database, before and after applying the preprocessing algorithms. Then, the impact of image preprocessing algorithms on the percentage of successful iris segmentation is evaluated by means of a visual inspection of images in order to determine if circumferences of iris and pupil were detected correctly. An increase from 59% to 73% in percentage of successful iris segmentation is obtained with an algorithm that combine elimination of specular reflections, followed by the implementation of a Gaussian filter having a 5x5 kernel. The results highlight the importance of a preprocessing stage as a previous step in order to improve the performance during the edge detection and iris segmentation processes.

  16. Scale Invariant Gabor Descriptor-Based Noncooperative Iris Recognition

    Directory of Open Access Journals (Sweden)

    Du Yingzi

    2010-01-01

    Full Text Available Abstract A new noncooperative iris recognition method is proposed. In this method, the iris features are extracted using a Gabor descriptor. The feature extraction and comparison are scale, deformation, rotation, and contrast-invariant. It works with off-angle and low-resolution iris images. The Gabor wavelet is incorporated with scale-invariant feature transformation (SIFT for feature extraction to better extract the iris features. Both the phase and magnitude of the Gabor wavelet outputs were used in a novel way for local feature point description. Two feature region maps were designed to locally and globally register the feature points and each subregion in the map is locally adjusted to the dilation/contraction/deformation. We also developed a video-based non-cooperative iris recognition system by integrating video-based non-cooperative segmentation, segmentation evaluation, and score fusion units. The proposed method shows good performance for frontal and off-angle iris matching. Video-based recognition methods can improve non-cooperative iris recognition accuracy.

  17. Scale Invariant Gabor Descriptor-based Noncooperative Iris Recognition

    Directory of Open Access Journals (Sweden)

    Zhi Zhou

    2010-01-01

    Full Text Available A new noncooperative iris recognition method is proposed. In this method, the iris features are extracted using a Gabor descriptor. The feature extraction and comparison are scale, deformation, rotation, and contrast-invariant. It works with off-angle and low-resolution iris images. The Gabor wavelet is incorporated with scale-invariant feature transformation (SIFT for feature extraction to better extract the iris features. Both the phase and magnitude of the Gabor wavelet outputs were used in a novel way for local feature point description. Two feature region maps were designed to locally and globally register the feature points and each subregion in the map is locally adjusted to the dilation/contraction/deformation. We also developed a video-based non-cooperative iris recognition system by integrating video-based non-cooperative segmentation, segmentation evaluation, and score fusion units. The proposed method shows good performance for frontal and off-angle iris matching. Video-based recognition methods can improve non-cooperative iris recognition accuracy.

  18. Ultrasound Biomicroscopy of Iris-claw Phakic Intraocular Lens Implantation

    Institute of Scientific and Technical Information of China (English)

    Ayong Yu; Zhende Lin; Xiaoyu Cai; Xiuqi Chen; Shuke Luo; Yonghua Li

    2006-01-01

    Purpose: To study in situ the intraocular position of iris-claw phakic intraocular lens (ICPIOL) in myopic eyes using ultrasound biomicroscopy (UBM).Methods: UBM echograms of the anterior segment were taken preoperatively and 62to 115 days postoperatively in 6 eyes implanted with the Verisys ICPIOL (AMO). The echograms were assessed for the effect of the ICPIOL on iris tissue.Results: The preoperative distance between the corneal endothelium and the lens ranged from 2.96 to 3.09 mm, and the postoperative distance between the ICPIOL and the corneal endothelium, from 1.86 to 2.03 mm. The distance between the lens and the posterior surface of the ICPIOL ranged from 0.61 to 0.76 mm. The distance between the superior, inferior optic edge and the iris ranged from 0.49 to 1.00 mm,0.21 to 0.51 mm respectively. The shortest distance between the ICPIOL haptics and the angle of anterior chamber ranged from 1.25 to 1.65 mm. The indentation of iris tissue by the ICPIOL haptics without pigmentary dispersion and distortion of posterior curvature of iris was observed.Conclusion: Adequate space is maintained between the Verisyse myopic ICPIOL and the corneal endothelium, angle, and crystalline lens. Haptic indentation of the iris without pigment erosion and distortion of iris curvature is noted. The ICPIOL implanted in phakic eyes is a safe alternative for treatment of high myopia.

  19. Pink lesions.

    Science.gov (United States)

    Giacomel, Jason; Zalaudek, Iris

    2013-10-01

    Dermoscopy (dermatoscopy or surface microscopy) is an ancillary dermatologic tool that in experienced hands can improve the accuracy of diagnosis of a variety of benign and malignant pigmented skin tumors. The early and more accurate diagnosis of nonpigmented, or pink, tumors can also be assisted by dermoscopy. This review focuses on the dermoscopic diagnosis of pink lesions, with emphasis on blood vessel morphology and pattern. A 3-step algorithm is presented, which facilitates the timely and more accurate diagnosis of pink tumors and subsequently guides the management for such lesions.

  20. Iris segmentation using an edge detector based on fuzzy sets theory and cellular learning automata.

    Science.gov (United States)

    Ghanizadeh, Afshin; Abarghouei, Amir Atapour; Sinaie, Saman; Saad, Puteh; Shamsuddin, Siti Mariyam

    2011-07-01

    Iris-based biometric systems identify individuals based on the characteristics of their iris, since they are proven to remain unique for a long time. An iris recognition system includes four phases, the most important of which is preprocessing in which the iris segmentation is performed. The accuracy of an iris biometric system critically depends on the segmentation system. In this paper, an iris segmentation system using edge detection techniques and Hough transforms is presented. The newly proposed edge detection system enhances the performance of the segmentation in a way that it performs much more efficiently than the other conventional iris segmentation methods.

  1. Methylene blue-related corneal edema and iris discoloration.

    Science.gov (United States)

    Timucin, Ozgur Bulent; Karadag, Mehmet Fatih; Aslanci, Mehmet Emin; Baykara, Mehmet

    2016-04-01

    We report the case of a 70-year-old female patient who developed corneal edema and iris discoloration following the inadvertent use of 1% methylene blue instead of 0.025% trypan blue to stain the anterior capsule during cataract phacoemulsification surgery. Copious irrigation was performed upon realization of incorrect dye use. Corneal edema and iris discoloration developed during the early postoperative period and persisted at 24-months follow-up. However, keratoplasty was not required. The intracameral use of 1% methylene blue has a cytotoxic effect on the corneal endothelium and iris epithelium. Copious irrigation for at least 30 min using an anterior chamber maintainer may improve outcomes.

  2. Hardware based segmentation in iris recognition and authentication systems

    Science.gov (United States)

    Ulis, Bradley J.; Broussard, Randy P.; Rakvic, Ryan N.; Ives, Robert W.; Steiner, Neil; Ngo, Hau

    2009-05-01

    Iris recognition algorithms depend on image processing techniques for proper segmentation of the iris. In the Ridge Energy Direction (RED) iris recognition algorithm, the initial step in the segmentation process searches for the pupil by thresholding and using binary morphology functions to rectify artifacts obfuscating the pupil. These functions take substantial processing time in software on the order of a few hundred million operations. Alternatively, a hardware version of the binary morphology functions is implemented to assist in the segmentation process. The hardware binary morphology functions have negligible hardware footprint and power consumption while achieving speed up of 200 times compared to the original software functions.

  3. BRCA1-IRIS overexpression promotes formation of aggressive breast cancers.

    Directory of Open Access Journals (Sweden)

    Yoshiko Shimizu

    Full Text Available INTRODUCTION: Women with HER2(+ or triple negative/basal-like (TN/BL breast cancers succumb to their cancer rapidly due, in part to acquired Herceptin resistance and lack of TN/BL-targeted therapies. BRCA1-IRIS is a recently discovered, 1399 residue, BRCA1 locus alternative product, which while sharing 1365 residues with the full-length product of this tumor suppressor gene, BRCA1/p220, it has oncoprotein-like properties. Here, we examine whether BRCA1-IRIS is a valuable treatment target for HER2(+ and/or TN/BL tumors. METHODOLOGY/PRINCIPAL FINDINGS: Immunohistochemical staining of large cohort of human breast tumor samples using new monoclonal anti-BRCA1-IRIS antibody, followed by correlation of BRCA1-IRIS expression with that of AKT1, AKT2, p-AKT, survivin and BRCA1/p220, tumor status and age at diagnosis. Generation of subcutaneous tumors in SCID mice using human mammary epithelial (HME cells overexpressing TERT/LT/BRCA1-IRIS, followed by comparing AKT, survivin, and BRCA1/p220 expression, tumor status and aggressiveness in these tumors to that in tumors developed using TERT/LT/Ras(V12-overexpressing HME cells. Induction of primary and invasive rat mammary tumors using the carcinogen N-methyl-N-nitrosourea (NMU, followed by analysis of rat BRCA1-IRIS and ERα mRNA levels in these tumors. High BRCA1-IRIS expression was detected in the majority of human breast tumors analyzed, which was positively correlated with that of AKT1-, AKT2-, p-AKT-, survivin, but negatively with BRCA1/p220 expression. BRCA1-IRIS-positivity induced high-grade, early onset and metastatic HER2(+ or TN/BL tumors. TERT/LT/BRCA1-IRIS overexpressing HME cells formed invasive subcutaneous tumors that express high AKT1, AKT2, p-AKT and vimentin, but no CK19, p63 or BRCA1/p220. NMU-induced primary and invasive rat breast cancers expressed high levels of rat BRCA1-IRIS mRNA but low levels of rat ERα mRNA. CONCLUSION/SIGNIFICANCE: BRCA1-IRIS overexpression triggers aggressive

  4. Challenges at different stages of an iris based biometric system

    Directory of Open Access Journals (Sweden)

    Sunil Kumar Singla

    2012-04-01

    Full Text Available Iris recognition has been used for authentication for the past few years and is capable of positive/negative authenticationof an individual without any physical contact or intervention. This technique is being used mainly because of its uniqueness,stability, and reliability but still many challenges are being faced an the iris based recognition system. This paperpresents the difficulties faced in different modules, like the sensor module, preprocessing module, feature extraction module,and matching module of an iris biometric system.

  5. Efectos del uso de harina de lombriz Eisenia spp. sobre la respuesta inmune humoral especifica y presencia de lesiones intestinales en ratones

    National Research Council Canada - National Science Library

    Tsai, Gary; Borges, Lerida; Petrosino, Pierina; Bianchi, Guillermo; Medina, Ana Luisa; Cova, Jose Angel

    2011-01-01

    ... (Glycine max), alimento de soya o concentrado proteico de soya. Sin embargo, el uso de este vegetal tiene algunos inconvenientes relacionados con la digestibilidad proteica [8], la biodisponibilidad de fosforo [18], presencia de factores anti-nutricionales y mal sabor [13], entre otros, lo cual trae como consecuencia retardo del crecimiento animal, altas ...

  6. Trade off between variable and fixed size normalization in orthogonal polynomials based iris recognition system.

    Science.gov (United States)

    Krishnamoorthi, R; Anna Poorani, G

    2016-01-01

    Iris normalization is an important stage in any iris biometric, as it has a propensity to trim down the consequences of iris distortion. To indemnify the variation in size of the iris owing to the action of stretching or enlarging the pupil in iris acquisition process and camera to eyeball distance, two normalization schemes has been proposed in this work. In the first method, the iris region of interest is normalized by converting the iris into the variable size rectangular model in order to avoid the under samples near the limbus border. In the second method, the iris region of interest is normalized by converting the iris region into a fixed size rectangular model in order to avoid the dimensional discrepancies between the eye images. The performance of the proposed normalization methods is evaluated with orthogonal polynomials based iris recognition in terms of FAR, FRR, GAR, CRR and EER.

  7. Serum oxidative stress is increased in patients with post cholecystectomy bile duct injury Aumento del estrés oxidativo en el suero de pacientes con lesiones de vías biliares postcolecistectomía

    Directory of Open Access Journals (Sweden)

    A. G. Miranda-Díaz

    2010-06-01

    Full Text Available Background: post-cholecystectomy bile duct injuries are identified by the onset of jaundice as well as elevated bilirubin and alkaline phosphatase levels during the peri-operative period. It is unknown how serum oxidative stress markers are modified in patients with post-cholecystectomy bile duct injuries. Objective: to determine serum oxidative stress marker levels (lipid peroxidation by-products, nitrites/nitrates and total antioxidant capacity in patients with post-cholecystectomy bile duct injuries. Patients and methods: a prospective, transversal and analytical study was designed with two groups. Group 1: 5 healthy volunteer subjects. Group 2: 52 patients with post-cholecystectomy bile duct injuries (43 female and 9 male. An elective bilio-digestive reconstruction was performed at week 8. The serum oxidative stress marker levels were quantified by colorimetric method. Results: patients with bile duct injuries had a significant increased serum lipid peroxides (malondialdehyde and 4-hydroxy-alkenals and nitric oxide metabolites (nitrites/nitrates levels compared to the control group. In contrast, total antioxidant capacity in patients with bile duct injuries remained similar compared to healthy controls. Conclusions: the results show that oxidative stress is usually associated to bile duct injury.Introducción: las lesiones de las vías biliares postcolecistectomía se establecen por la aparición de ictericia, elevación de las bilirrubinas y de la fosfatasa alcalina durante el periodo perioperatorio. Se desconoce cómo se modifican los marcadores de estrés oxidativo en el suero de los pacientes con lesiones de las vías biliares postcolecistectomía. Objetivo: determinar los marcadores de estrés oxidativo (productos de peroxidación de lípidos, catabolitos del óxido nítrico y capacidad antioxidante total en el suero de pacientes con lesiones de las vías biliares. Pacientes y métodos: se realizó un estudio prospectivo transversal

  8. Comparison of destructive periodontal disease in blue iris mink to PCB 126-induced mandibular and maxillary squamous epithelial proliferation in natural dark mink.

    Science.gov (United States)

    Ellick, Rachel M; Fitzgerald, Scott D; Link, Jane E; Bursian, Steven J

    2013-01-01

    Mink (Mustela vison) exposed to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)-like chemicals have been reported to develop mandibular and maxillary squamous cell proliferation that results in the destruction of alveolar bone and eventual tooth loss. This jaw lesion has been reported in wild mink collected from areas contaminated with TCDD-like compounds and is a potential biomarker for exposure to these chemicals. The blue iris strain of domestic mink is prone to develop severe periodontal disease, which results in destruction of bone and tooth loss that is grossly similar to the lesion induced by exposure to TCDD-like chemicals. A histological assessment of jaws from blue iris mink and natural dark mink exposed to 3,3',4,4',5-pentachlorobiphenyl (PCB 126) was done to determine whether the oral lesions are similar. The jaw tissue from the blue iris mink had lesions indicative of lymphoplasmacytic gingivitis and osteomyelitis, caused by inflammation entering the dental sulcus, while the jaw tissue from the mink exposed to PCB 126 exhibited squamous epithelial proliferation. Therefore, it was determined that the tooth loss and bone destruction seen in these mink are of different origin despite the similarity of the gross clinical signs.

  9. Lesiones en el deporte

    OpenAIRE

    2000-01-01

    Not available

    El incremento de la actividad física y del deporte, en las sociedades llamadas desarrolladas, ha traído consigo beneficios claros para la salud, reflejados en diferentes indicadores de salud. Simultáneamente, el deporte de competición obliga a una dedicación diaria a intensidad de entrenamiento, con objeto de obtener los elevados requerimientos físicos que exige la competición. Todo ello ha traído consigo la aparición de numerosas lesiones, fundamentalmen...

  10. Lesiones en corredores amateurs

    OpenAIRE

    Natale, Vanesa

    2011-01-01

    Se realizó un estudio tomando como muestra a 100 corredores amateurs de la ciudad de Mar del Plata, en la cual el objetivo general fue determinar cuáles son las patologías más frecuentes en corredores. Correr no es solo un deporte en si mismo sino que tiene elementos de otras actividades deportivas, es decir, que las lesiones de los corredores también son comunes en otros tipos de deportes. El número de deportistas aumenta diariamente y al mismo tiempo aumentan el número de per...

  11. Review of EPA's Integrated Risk Information System (IRIS) Process

    National Research Council Canada - National Science Library

    Board on Environmental Studies and Toxicology; Division on Earth and Life Studies; National Research Council; National Research Council

    2014-01-01

    ...) that is responsible for developing toxicologic assessments of environmental contaminants. An IRIS assessment contains hazard identifications and dose-response assessments of various chemicals related to cancer and noncancer outcomes...

  12. 8-Valent Fuzzy Logic for Iris Recognition and Biometry

    CERN Document Server

    Popescu-Bodorin, N; Motoc, I M; 10.1109/ISCIII.2011.6069761

    2011-01-01

    This paper shows that maintaining logical consistency of an iris recognition system is a matter of finding a suitable partitioning of the input space in enrollable and unenrollable pairs by negotiating the user comfort and the safety of the biometric system. In other words, consistent enrollment is mandatory in order to preserve system consistency. A fuzzy 3-valued disambiguated model of iris recognition is proposed and analyzed in terms of completeness, consistency, user comfort and biometric safety. It is also shown here that the fuzzy 3-valued model of iris recognition is hosted by an 8-valued Boolean algebra of modulo 8 integers that represents the computational formalization in which a biometric system (a software agent) can achieve the artificial understanding of iris recognition in a logically consistent manner.

  13. IRIS Toxicological Review of Hydrogen Cyanide (External Review Draft)

    Science.gov (United States)

    EPA is conducting a peer review of the scientific basis supporting the human health hazard and dose-response assessment of hydrogen cyanide and cyanide salts that will appear on the Integrated Risk Information System (IRIS) database.

  14. Mid-Columbia - Yellow-flag Iris Eradication 2014

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The project as described was to attempt to eradicate yellow-flag iris from Toppenish, McNary and Columbia National Wildlife Refuges using chemical and, where...

  15. Mid-Columbia - Eradication of Yellow-flag Iris 2013

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The project as described was to attempt to eradicate yellow-flag iris from Toppenish, McNary and Columbia National Wildlife Refuges using chemical and, where...

  16. Peer Review Comments on the IRIS Assessment of Benzene

    Science.gov (United States)

    Attachment to IRIS file for benzene, January 19, 2000, RESPONSE TO THE PEER REVIEW COMMENTS, II. Extrapolation of the Benzene Inhalation Unit Risk Estimate to the Oral Route of Exposure (EPA/NCEA-W-0517, July 1999)

  17. IRIS Toxicological Review of Hydrogen Cyanide (External Review Draft)

    Science.gov (United States)

    EPA is conducting a peer review of the scientific basis supporting the human health hazard and dose-response assessment of hydrogen cyanide and cyanide salts that will appear on the Integrated Risk Information System (IRIS) database.

  18. IRIS Toxicological Review for Acrylamide (Interagency Science Discussion Draft)

    Science.gov (United States)

    EPA is releasing the draft report, Toxicological Review for Acrylamide, that was distributed to Federal agencies and White House Offices for comment during the Science Discussion step of the IRIS Assessment Development Process<...

  19. Exploratory simulation of an Intelligent Iris Verifier Distributed System

    CERN Document Server

    Popescu-Bodorin, Nicolaie; 10.1109/SACI.2011.5873010

    2011-01-01

    This paper discusses some topics related to the latest trends in the field of evolutionary approaches to iris recognition. It presents the results of an exploratory experimental simulation whose goal was to analyze the possibility of establishing an Interchange Protocol for Digital Identities evolved in different geographic locations interconnected through and into an Intelligent Iris Verifier Distributed System (IIVDS) based on multi-enrollment. Finding a logically consistent model for the Interchange Protocol is the key factor in designing the future large-scale iris biometric networks. Therefore, the logical model of such a protocol is also investigated here. All tests are made on Bath Iris Database and prove that outstanding power of discrimination between the intra- and the inter-class comparisons can be achieved by an IIVDS, even when practicing 52.759.182 inter-class and 10.991.943 intra-class comparisons. Still, the test results confirm that inconsistent enrollment can change the logic of recognition ...

  20. Gabor Filter Optimization Design for Iris Texture Analysis

    Institute of Scientific and Technical Information of China (English)

    Tao Xu; Xing Ming; Xiaoguang Yang

    2004-01-01

    This paper deals with an optimization design method for the Gabor filters based on the analysis of an iris texture model. By means of analyzing the properties of an iris texture image, the energy distribution regularity of the iris texture image measured by the average power spectrum density is exploited, and the theoretical ranges of the efficient valued frequency and orientation parameters can also be deduced. The analysis shows that the energy distribution of the iris texture is generally centralized around lower frequencies in the spatial frequency domain. Accordingly, an iterative algorithm is designed to optimize the Gabor parameter field. The experimental results indicate the validity of the theory and efficiency of the algorithm.

  1. Bilateral acute iris transillumination (BAIT initially misdiagnosed as acute iridocyclitis

    Directory of Open Access Journals (Sweden)

    Saban Gonul

    2015-04-01

    Full Text Available Bilateral acute iris transillumination (BAIT is a relatively new clinical entity characterized by bilateral acute loss of iris pigment epithelium, iris transillumination, pigment dispersion in the anterior chamber, and sphincter paralysis. We report the case of a 30-year-old male who was initially diagnosed with acute iridocyclitis in a different clinic and treated with topical and systemic corticosteroids. He was referred to our clinic to seek another opinion because his symptoms did not improve. An ocular examination revealed bilateral pigment dispersion into the anterior chamber, diffuse iris transillumination, pigment dusting on the anterior lens capsule, atonic and distorted pupils, and increased intraocular pressure, suggesting a diagnosis of BAIT rather than iridocyclitis. Clinicians should be aware of the differential diagnosis of syndromes associated with pigment dispersion from iridocyclitis to avoid aggressive anti-inflammatory therapy and detailed investigation for uveitis.

  2. IRIS TOXICOLOGICAL REVIEW OF TETRACHLOROETHYLENE (PERCHLOROETHYLENE) (INTERAGENCY SCIENCE DISCUSSION DRAFT)

    Science.gov (United States)

    EPA is releasing the draft report, Toxicological Review of Tetrachloroethylene (Perchloroethylene), that was distributed to Federal agencies and White House Offices for comment during the Science Discussion step of the IRIS Assessment...

  3. IRIS Toxicological Review for Acrylamide (Interagency Science Discussion Draft)

    Science.gov (United States)

    EPA is releasing the draft report, Toxicological Review for Acrylamide, that was distributed to Federal agencies and White House Offices for comment during the Science Discussion step of the IRIS Assessment Development Process<...

  4. Iris Recognition Based on LBP and Combined LVQ Classifier

    CERN Document Server

    Shams, M Y; Nomir, O; El-Awady, R M; 10.5121/ijcsit.2011.3506

    2011-01-01

    Iris recognition is considered as one of the best biometric methods used for human identification and verification, this is because of its unique features that differ from one person to another, and its importance in the security field. This paper proposes an algorithm for iris recognition and classification using a system based on Local Binary Pattern and histogram properties as a statistical approaches for feature extraction, and Combined Learning Vector Quantization Classifier as Neural Network approach for classification, in order to build a hybrid model depends on both features. The localization and segmentation techniques are presented using both Canny edge detection and Hough Circular Transform in order to isolate an iris from the whole eye image and for noise detection .Feature vectors results from LBP is applied to a Combined LVQ classifier with different classes to determine the minimum acceptable performance, and the result is based on majority voting among several LVQ classifier. Different iris da...

  5. Mid-Columbia - Yellow-flag Iris Control

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Yellow-flag iris is an escaped ornamental rhizomatous perennial herb that forms dense vegetative mats in riparian and wetland areas. These mats can displace most...

  6. Ethnicity distinctiveness through iris texture features using Gabor filters

    CSIR Research Space (South Africa)

    Mabuza-Hocquet, Gugulethu P

    2017-02-01

    Full Text Available and ethnicity. Researchers have reported that iris texture features contain information that is inclined to human genetics and is highly discriminative between different eyes of different ethnicities. This work applies image processing and machine learning...

  7. IRIS Toxicological Review of Trichloroethylene (TCE) (External Review Draft)

    Science.gov (United States)

    EPA is conducting a peer review and public comment of the scientific basis supporting the human health hazard and dose-response assessment of Trichloroethylene (TCE) that when finalized will appear on the Integrated Risk Information System (IRIS) database.

  8. Khan Krum - ʺThe Fearsomeʺ: A Noble Bulgarian with Iris-Fibroma?

    Directory of Open Access Journals (Sweden)

    Georgi Tchernev

    2017-08-01

    Full Text Available A 40-year-old Caucasian, the otherwise healthy male patient, presented with 3-years history of a prominent tumor-like formation, located on his back, without subjective complaints. Initially, the lesion was 1-2 cm in size but gradually increased to a visible-pronounced tumor-like formation. No other dermatologic diseases, neither other known abnormalities were reported for the medical and family history.  Softly-elastic on palpation tumor-like formation was established in the left infrascapular area of the back, measuring 8/9 cm in diameter. The lesion was clinically suspected for lipoma or another soft-tissue tumour with benign nature, so the patient underwent planned surgical excision under local anaesthesia. A tumour was excited with deep elliptical excision and furthered for histological evaluation, while the wound edges were sutured with single cutaneous stitches. Additionally, a large black-colored tattoo of the Bulgarian historical noble Khan Krum was also observed within the clinical examination, covering almost the whole upper 1/3 part of the patient’s back Within the careful clinical observation of the tattoo, we noticed a fibroma-like lesion, affecting the noble’s right iris. Fibromas are common benign tumours in Caucasians, composed of fibrous or connective tissue. They can be seen in all organs from mesenchymal tissue, in varies size. Eyelids are often commonly affected in elderly. Although very commonly seen in every day dermatological practice, fibromas have been never reported, located in the iris. In the presented case, a small ʺiris-fibromaʺ, hidden within a black-colored tattoo was diagnosed in a patient with lipoma, as a sporadic clinical finding.

  9. A bibliography of IRIS-related publications, 2000-2011

    Science.gov (United States)

    Muco, B.

    2012-12-01

    Citations and acknowledgements in scientific journals can be an indicator of the role an organization has on the research of that field. Since its formation and incorporation in May 1984, the IRIS Consortium (Incorporated Research Institutions for Seismology) is mentioned more and more as a valuable source of data, instruments and programs in the literature of earth sciences. As a large organization with more than 100 member domestic institutes and about 40 international affiliates, obviously IRIS has a direct impact on the earth sciences through all its programs, projects, workshops, symposia, and news¬letters and as a lively forum for exchanging ideas. In order to maintain support from National Science Foundation (NSF) and the research community, it is important to document the continued use of IRIS facilities in basic research programs. IRIS maintains a database of articles that are based on the use of IRIS facilities or which reference use of IRIS data and resources. Articles in this database have been either been provided to IRIS by the authors or selected through an annual search of a number of prominent journals. A text version of the full bibliographic database is available on the IRIS website and a version in EndNote format is also provided. To provide a more complete bibliography and a consistent evaluation of temporal tends in publications, a special annual search began in 2000 which focused on a subset of key seismology and Earth science journals: Bulletin of Seismological Society of America, Journal of Geophysical Research, Seismological Research Letters, Geophysical Research Letters, Earth and Planetary Science Letters, Physics of the Earth and Planetary Interiors, Tectonophysics, Geophysical Journal International, Nature, Science, Geology and EOS. Using different search engines as Scirus, ScienceDirect, GeoRef, OCLC First Search, EASI Search, NASA Abstract Service etc. for online journals and publishers' databases, we searched for key words (IRIS

  10. Iris Pattern Segmentation using Automatic Segmentation and Window Technique

    OpenAIRE

    Swati Pandey; Prof. Rajeev Gupta

    2013-01-01

    A Biometric system is an automatic identification of an individual based on a unique feature or characteristic. Iris recognition has great advantage such as variability, stability and security. In thispaper, use the two methods for iris segmentation -An automatic segmentation method and Window method. Window method is a novel approach which comprises two steps first finds pupils' center andthen two radial coefficients because sometime pupil is not perfect circle. The second step extract the i...

  11. Evaluación del módulo de elasticidad de materiales estéticos para la restauración de lesiones cervicales

    Directory of Open Access Journals (Sweden)

    Claudia Estela Bonnin

    2012-06-01

    Full Text Available La pérdida de tejido en la zona cervical ha sido atribuida principalmente a la erosión y abrasión producidas por el cepillo de dientes. El rol de las fuerzas oclusales es un factor muy importante a tener en cuenta en el desarrollo y avance de estas lesiones cervicales no cariosas. Distinguir las diferentes propiedades mecánicas y sobre todo el módulo de elasticidad de los materiales estéticos utilizados para la restauración de este tipo de lesiones, permitirá una sobrevida mayor de las obturaciones y una gran mejoría en el tratamiento de nuestros pacientes. El objetivo de este trabajo fue evaluar el módulo de elasticidad de 6 materiales restauradores estéticos. Siguiendo la norma ISO 4049 se confeccionaron 10 probetas de cada material experimental. Se empleó el ensayo de flexión de 3 puntos con una INSTRON 4486. De la relación numérica entre los valores de tensión (T y deformación (D, se obtuvo el módulo de elasticidad o de Young (E, para cada material experimental. El análisis de varianza mostró diferencias significativas (p < 0,0001 entre los diferentes materiales. Los compómeros flow fueron los que presentaron mejores resultados en esta condición experimental, fueron los indicados para la restauracion de lesiones de abfracción.

  12. Análisis de los motivos del abandono del proceso de seguimiento y tratamiento por parte de mujeres con lesiones precursoras de cáncer de cuello uterino en la provincia de Jujuy: implicancias para la gestión

    OpenAIRE

    Melisa Paolino; Silvina Arrossi

    2012-01-01

    El adecuado seguimiento y tratamiento de las mujeres con lesiones escamosas intraepiteliales de alto grado (HSIL, por sus siglas en ingles) y carcinoma es un aspecto clave para la reducción de la mortalidad por cáncer de cuello uterino. El objetivo de esta investigación es analizar la magnitud y los motivos del abandono en el proceso de seguimiento y tratamiento por parte de las mujeres con diagnóstico de HSIL y carcinoma atendidas en el sistema público de la provincia de Jujuy durante 2010. ...

  13. Detección del virus del papiloma humano de alto riesgo por captura híbrida II® según hallazgos citológicos en mujeres tratadas por lesiones escamosas intraepiteliales de cuello uterino, período 2006/2010

    OpenAIRE

    Mongelós,Pamela; Páez,Malvina; Rodriguez-Riveros, Isabel; Giménez,Graciela; Castro, Amalia; Mendoza, Laura

    2013-01-01

    OBJETIVO: Determinar la frecuencia del virus de papiloma humano de alto riesgo oncogénico (HR-HPV) por captura híbrida II (r) (CH II(r)) según hallazgos citológicos en mujeres tratadas por lesiones escamosas intraepiteliales (SIL) de cuello uterino. MATERIAL Y MÉTODO: Estudio descriptivo de corte transverso de una serie de casos, en donde se incluyeron 122 mujeres tratadas, 79 (65%) por SIL de bajo grado (LSIL) y 43 (35%) por SIL de alto grado (HSIL) que concurrieron al Laboratorio de HPV...

  14. Detección de Lesiones en Mamografías y Ecografías para el Diagnóstico del Cáncer de Mama.

    OpenAIRE

    Díaz Pizarro, María Gema

    2014-01-01

    Los nuevos avances tecnológicos y la implantación de sistemas informatizados en clínicas y hospitales ofrecen una gran cantidad de posibilidades en diagnóstico automático de enfermedades. Puede haber muchas diferencias entre las imágenes médicas a analizar debido a las variaciones existentes entre unas pruebas y otras, así como a las distintas fisionomías de los pacientes. Distinguir lesiones en pacientes donde el tejido de la mama tiene un color similar al de la lesión pres...

  15. Fisiopatoligia de las tormentas electricas en el encefalo del paciente con una lesion cerebral aguda. Resultados preliminares de un estudio piloto

    DEFF Research Database (Denmark)

    Sahuquillo, J; Sueiras, M; Garcia-Lopez, B;

    2011-01-01

    The phenomena of cortical spreading depolarization (CSD and CSD-like phenomena) are cellular depolarization waves involved in the progression of lesions in patients with stroke and traumatic brain injury (TBI). Which are detected by an electrocorticographic (ECoG) recording. Experimentally, CSD...... induces cerebral hypoxia and increases the permeability of the blood-brain barrier. Objectives: To determine the frequency and duration of CSD episodes in patients with TBI and malignant middle cerebral artery infarction (MMCAI) requiring craniectomy. Material and methods: 20 patients were included....... Conclusions: Episodes of CSD and CSD-like phenomena are frequently detected in patients with MMCAI and TBI....

  16. SINGLE FRAME SUPER RESOLUTION OF NONCOOPERATIVE IRIS IMAGES

    Directory of Open Access Journals (Sweden)

    Anand Deshpande

    2016-11-01

    Full Text Available Image super-resolution, a process to enhance image resolution, has important applications in biometrics, satellite imaging, high definition television, medical imaging, etc. The long range captured iris identification systems often suffer from low resolution and meager focus of the captured iris images. These degrade the iris recognition performance. This paper proposes enhanced iterated back projection (EIBP method to super resolute the long range captured iris polar images. The performance of proposed method is tested and analyzed on CASIA long range iris database by comparing peak signal to noise ratio (PSNR and structural similarity index (SSIM with state-of-the-art super resolution (SR algorithms. It is further analyzed by increasing the up-sampling factor. Performance analysis shows that the proposed method is superior to state-of-the-art algorithms, the peak signal-to-noise ratio improved about 0.1-1.5 dB. The results demonstrate that the proposed method is well suited to super resolve the iris polar images captured at a long distance

  17. A multi-approach feature extractions for iris recognition

    Science.gov (United States)

    Sanpachai, H.; Settapong, M.

    2014-04-01

    Biometrics is a promising technique that is used to identify individual traits and characteristics. Iris recognition is one of the most reliable biometric methods. As iris texture and color is fully developed within a year of birth, it remains unchanged throughout a person's life. Contrary to fingerprint, which can be altered due to several aspects including accidental damage, dry or oily skin and dust. Although iris recognition has been studied for more than a decade, there are limited commercial products available due to its arduous requirement such as camera resolution, hardware size, expensive equipment and computational complexity. However, at the present time, technology has overcome these obstacles. Iris recognition can be done through several sequential steps which include pre-processing, features extractions, post-processing, and matching stage. In this paper, we adopted the directional high-low pass filter for feature extraction. A box-counting fractal dimension and Iris code have been proposed as feature representations. Our approach has been tested on CASIA Iris Image database and the results are considered successful.

  18. Parasellar lesions

    Energy Technology Data Exchange (ETDEWEB)

    Ruscalleda, J. [Hospital Sant Pau, Radiology Department, Neuroradiology, Barcelona (Spain)

    2005-03-01

    The sellar and parasellar region is an anatomically complex area that represents a crucial crossroad of important adjacent structures, e.g. orbits, cavernous sinus and its content, polygon of Willis, hypothalamus through the pituitary stalk and dural reflections forming the diaphragm sellae and the walls of the cavernous sinuses. Although the cavernous sinus represents the most relevant parasellar structure, from the practical and clinical point of view all the structures that surround the sella turcica can be included in the parasellar region. CT and, mainly, MRI are the imaging modalities to study and characterise the normal anatomy and the majority of processes in this region. We present a practical short review of the most relevant CT and MRI characteristics, such as location, nature of contrast enhancement and presence of cystic components, together with clinical findings, which permit differentiation of the most frequent and less common lesions found in the parasellar region. Learning objectives: A short review of the anatomy and clinical symptoms related to the parasellar region. Radiological characterisation, mainly by MRI, of the many lesions that alter the structure and function of sellar and parasellar anatomy. Description of the MRI features that permit differentiation among less common lesions. (orig.)

  19. Lessons learned from IRIS EPO program evaluations

    Science.gov (United States)

    Taber, J.; Hubenthal, M.

    2012-12-01

    Evaluating the overall impact of EPO programs that include activities ranging from formal education through broad public outreach, is a complex issue. The impact of education activities targeted at narrowly defined audiences is generally easier to quantify than the national impact of outreach activities conducted by a relatively small program. For educational activities, our approach has been to leverage the best-practices identified through research and to continuously assess the individual elements internally with the intention of making improvements based on the data generated and the existing research. By constructing our elements on the best practices identified by the research community we feel that internal formative evaluation is a valid means to determine if an activity is effective, particularly when the results are compared to similar programs. For example, effective practices of professional development are well documented in the literature. As a result, this allows us to shape our programs and our evaluations to monitor elements that have been identified as key by the educational research community. Further, such actions allow us to avoid allocating significant resources with the intention of pinning down direct causal relationships between our programs and consumers, when similar interventions (conducted by others) have already shown such relationships. Ongoing review by an EPO advisory committee also provides regular oversight of program impact. While we find internal and external formative evaluation extremely useful in shaping the program and documenting its impact, we also recognize the value of a summative evaluation process. For example, an external summative evaluation of the IRIS EPO program was conducted in 2009, followed by an external panel review, as part of the regular review of IRIS programs. We found that the most valuable part of the external evaluation was our preparation, including clarifying the goals of each of the elements of the

  20. Análisis de los motivos del abandono del proceso de seguimiento y tratamiento por parte de mujeres con lesiones precursoras de cáncer de cuello uterino en la provincia de Jujuy: implicancias para la gestión

    Directory of Open Access Journals (Sweden)

    Melisa Paolino

    2012-01-01

    Full Text Available El adecuado seguimiento y tratamiento de las mujeres con lesiones escamosas intraepiteliales de alto grado (HSIL, por sus siglas en ingles y carcinoma es un aspecto clave para la reducción de la mortalidad por cáncer de cuello uterino. El objetivo de esta investigación es analizar la magnitud y los motivos del abandono en el proceso de seguimiento y tratamiento por parte de las mujeres con diagnóstico de HSIL y carcinoma atendidas en el sistema público de la provincia de Jujuy durante 2010. Se realizó el análisis de fuentes secundarias y entrevistas domiciliarias a las mujeres. El porcentaje de abandono en la población de estudio fue del 23,5%. Entre estas mujeres, el 40,5% mencionó motivos de abandono relacionados con la organización del sistema de salud y el 30,9% mencionó motivos subjetivos. Los resultados han sido utilizados como insumos para la reorganización del proceso de seguimiento y tratamiento que se está llevando a cabo en la provincia.

  1. Lesions of the buccal mucosa in elderly. A study performed in five family doctor´s office of health area III in Cienfuegos city. Lesiones de la mucosa bucal del adulto mayor. Un estudio en cinco consultorios del área III de Cienfuegos.

    OpenAIRE

    Mikhail Benet Rodríguez; Arturo Guerra Alfonso; Beatriz García Alpízar

    2005-01-01

    Fundament: Bucal lesions in aged persons are very frequent and are not the same in many countries and regions. To know about them is of great importance for we can plan preventive activities and medical services for their attention Objective: To describe the more frequent intraoral mucous lesions in individuals with 60 years old and more. Methods: Descriptive study with...

  2. Versatilidad del colgajo en hacha para reconstrucción de lesiones en punta de dedo Versatility of the hatchet flap for reconstruction of fingertip injuries

    OpenAIRE

    Fernández García,A.; T. Soria Cogollos; R.A. Moreno Villalba; C. Fernández Pascual; S. Alonso Rosa

    2008-01-01

    El colgajo en hacha descrito por Emmet, ha sido recientemente aplicado por Tuncali et al. en amputaciones de punta de dedo. Este sencillo colgajo triangular puede ser utilizado tanto en amputaciones transversas como oblicuas. El objetivo del estudio es presentar nuestra experiencia con este versátil colgajo en la reconstrucción de punta de dedo. Incluimos en el estudio 5 pacientes que completaron un periodo de seguimiento de un año. El nivel de amputación fue considerado de acuerdo con la cla...

  3. Remoción de terceros molares mandibulares con asistencia endoscópica: Nota técnica de un nuevo procedimiento quirúrgico para prevenir lesiones del NAI y formación de defectos óseos

    OpenAIRE

    Fuentes,R; V Beltrán; M Cantín; Engelke, W

    2012-01-01

    La variada posición anatómica de los terceros molares mandibulares presenta importantes desafíos asociados a su profundidad y grado de inclinación. Las complicaciones más habituales del procedimiento quirúrgico convencional de extracción se relacionan con la extensa osteotomía y poca visualización del sitio quirúrgico, que pueden generar consecuencias post-quirúrgicas como inflamación, dolor, trismus, lesiones reversibles e irreversibles del nervio alveolar inferior (NAI) o nervio lingual, ri...

  4. Análisis de interfaces basadas en movimientos de iris y de cabeza para personas con parálisis cerebral

    OpenAIRE

    Clemotte, Alejandro

    2013-01-01

    Este documento es la memoria final del trabajo de fin de Máster para optar al título de Máster en Ingeniería de Sistemas Electrónicos. El trabajo lleva por nombre “Análisis de interfaces basadas en movimientos de iris y de cabeza para personas con parálisis cerebral”. Ha sido desarrollado por el Ing. Alejandro Clemotte bajo la supervisión del Dr. Rafael Raya, Dr. Ramón Ceres y el Dr. Ricardo de Cordoba en el periodo 2011-2013. El trabajo ha sido desarrollado en las instalaciones del grupo de ...

  5. Aqueous humor tyrosinase activity is indicative of iris melanocyte toxicity.

    Science.gov (United States)

    Mahanty, Sarmistha; Kawali, Ankush A; Dakappa, Shruthi Shirur; Mahendradas, Padmamalini; Kurian, Mathew; Kharbanda, Varun; Shetty, Rohit; Setty, Subba Rao Gangi

    2017-09-01

    Antibiotics such as fluoroquinolones (FQLs) are commonly used to treat ocular infections but are also known to cause dermal melanocyte toxicity. The release of dispersed pigments from the iris into the aqueous humor has been considered a possible ocular side effect of the systemic administration of FQLs such as Moxifloxacin, and this condition is known as bilateral acute iris transillumination (BAIT). Bilateral acute depigmentation of iris (BADI) is a similar condition, with iris pigment released into the aqueous, but it has not been reported as a side effect of FQL. Iris pigments are synthesized by the melanogenic enzyme tyrosinase (TYR) and can be detected but not quantified by using slit-lamp biomicroscopy. The correlation between dispersed pigments in the aqueous and the extent of melanocyte toxicity due to topical antibiotics in vivo is not well studied. Here, we aimed to study the effect of topical FQLs on iris tissue, the pigment release in the aqueous humor and the development of clinically evident iris atrophic changes. We evaluated this process by measuring the activity of TYR in the aqueous humor of 82 healthy eyes undergoing cataract surgery following topical application of FQLs such as Moxifloxacin (27 eyes, preservative-free) or Ciprofloxacin (29 eyes, with preservative) or the application of non-FQL Tobramycin (26 eyes, with preservative) as a control. In addition, the patients were questioned and examined for ocular side effects in pre- and post-operative periods. Our data showed a significantly higher mean TYR activity in the aqueous humor of Ciprofloxacin-treated eyes compared to Moxifloxacin- (preservative free, p humor from both Ciprofloxacin- and Moxifloxacin-treated eyes showed the presence of soluble TYR enzyme, thus reflecting its toxicity to iris melanocytes and corresponding to its activity in the aqueous humor. Intriguingly, none of these patients developed any clinically appreciable ocular side effects characteristic of BAIT or BADI

  6. Dynamic iris biometry: a technique for enhanced identification

    Directory of Open Access Journals (Sweden)

    McDowell Douglas R

    2010-07-01

    Full Text Available Abstract Background The iris as a unique identifier is predicated on the assumption that the iris image does not alter. This does not consider the fact that the iris changes in response to certain external factors including medication, disease, surgery as well as longer term ageing changes. It is also part of a dynamic optical system that alters with light level and focussing distance. A means of distinguishing the features that do not alter over time from those that do is needed. This paper applies iris recognition algorithms to a newly acquired database of 186 iris images from four subjects. These images have greater magnification and detail than iris images in existing databases. Iris segmentation methods are tested on the database. A new technique that enhances segmentation is presented and compared to two existing methods. These are also applied to test the effects of pupil dilation in the identification process. Findings Segmentation results from all the images showed that using the proposed algorithm accurately detected pupil boundaries for 96.2% respectively of the images, which was an increase of 88.7% over the most commonly used algorithm. For the images collected, the proposed technique also showed significant improvement in detection of the limbal boundary compared to the detection rates using existing methods. With regard to boundary displacement errors, only slight errors were found with the proposed technique compared to extreme errors made when existing techniques were applied. As the pupil becomes more dilated, the success of identification is increasingly more dependent on the decision criterion used. Conclusions The enhanced segmentation technique described in this paper performs with greater accuracy than existing methods for the higher quality images collected in this study. Implementation of the proposed segmentation enhancement significantly improves pupil boundary detection and therefore overall iris segmentation. Pupil

  7. [Management of intraoperative floppy iris syndrome].

    Science.gov (United States)

    Chiseliţă, D; Cantemir, Alina; Epifanov, Lucia; Huţuleac, Alexandra; Irod, Alexandra

    2012-01-01

    To evaluate the incidence of IFIS in male patients whith alfa 1-AB treatment for benign prostatic hyperplasia (BPH) who underwent cataract surgery and also the pre and intraoperatory management and IFIS profilaxy. Iasi "Sf Spiridon" Emergency Hospital and "Oftaprof" private practice Observational retrospective study that took place over a period of 2 years (july 2009-july 2011) and reviewed 2484 eyes that underwent cataract surgery. A number of 1199 eyes were from 1049 male patients. Out of the 1049 male patients, 139 (13,25%) underwent treatment for BHP using the medication as follows: 119 used tamsulosin (85,6%); 18 used doxazosin, (12,94%); 2 used alfuzosin (1,43%). Out of the 139 men, 32 (23,02%) showed IFIS but only the ones treated with tamsulosin. After introducing a surgical protocol that comprised of the use of large amounts of vascoelastic material (Viscoat), intracamerular fenilefrin (Mezaton), the use of iris retractors and low faco parameters the incidence and severity of IFIS was significantly reduced. Correct evauation before surgery is necessary in order to anticipate the condition as its frequency and severity can be reduced by a proactive behavior which demands experience and adequate endowment.

  8. Revisión bibliográfica del tratamiento de las lesiones meniscales degenerativas: meniscectomía artroscópica vs. fisioterapia

    OpenAIRE

    Martínez Jiménez, Soraya

    2015-01-01

    Antecedentes: La cirugía artroscópica como tratamiento de la lesión meniscal es la intervención quirúrgica traumatológica más frecuente. Está demostrada su eficacia en las lesiones meniscales traumáticas en pacientes jóvenes pero no está tan clara su indicación en las roturas meniscales degenerativas. Objetivos: El objetivo principal de esta revisión es descubrir cuál es el mejor tratamiento para una lesión de menisco degenerativa, si la intervención quirúrgica por art...

  9. Utilidad en la combinación de oligonucleótidos universales para la detección del virus del papiloma humano en cáncer cervicouterino y lesiones premalignas Usefulness of combining universal oligonucleotides in detecting human papillomavirus in cervical cancer and premalignant lesions

    OpenAIRE

    Adela Carrillo; Alejandro Mohar; Abelardo Meneses; Mauricio Frías-Mendivil; Gilberto Solorza; Marcela Lizano

    2004-01-01

    OBJETIVO: Determinar la frecuencia y distribución del virus del papiloma humano en los diferentes estadios que conforman la historia natural del cáncer cérvico uterino, y optimizar la detección mediante el uso de diferentes oligonucleótidos universales. MATERIAL Y MÉTODOS: Se trata de un estudio transversal, descriptivo, en el que las muestras fueron colectadas durante enero a diciembre de 1999. El procesamiento de las muestras y el análisis de los datos se realizaron en el Instituto Nacional...

  10. Lesiones frecuentes en bailarines de murga

    OpenAIRE

    Pina, Matías

    2015-01-01

    En toda actividad que involucre la utilización y el movimiento corporal como es el baile Murgueros pueden aparecer algunos trastornos del aparato locomotor asociados a diferentes regiones del cuerpo ya que la exigencia de distintas tareas expone a la columna vertebral, a los miembros superiores e inferiores y significativamente al aparato psíquico (Freud, 1915)1. OBJETIVOS Caracterizar las lesiones más frecuentes del grupo de bailarines integrantes de unas murgas de la ci...

  11. GNSS derived TEC data ingestion into IRI 2012

    Science.gov (United States)

    Migoya-Orué, Yenca; Nava, Bruno; Radicella, Sandro; Alazo-Cuartas, Katy

    2015-04-01

    Experimental vertical total electron content (VTEC) data given by Global Ionospheric Maps (GIM) has been ingested into the IRI version 2012, aiming to obtain grids of effective input parameter values that allow to minimize the difference between the experimental and modeled vertical TEC. Making use of the experience gained with the technique of model adaptation applied to NeQuick (Nava et al., 2005), it has been found possible to compute IRI world grids of effective ionosphere index parameters (IG). The IG grids thus obtained can be interpolated in space and time to calculate with IRI the 3D electron density at any location and also the TEC along any ground-to-satellite ray-path for a given epoch. In this study, the ingestion technique is presented and a posteriori validation, along with an assessment of the capability of the 'ingested' IRI to reproduce the ionosphere day-to-day foF2 variability during disturbed and quiet periods. The foF2 values retrieved are compared with data from about 20 worldwide ionosondes for selected periods of high (year 2000) and moderate to low solar activity (year 2006). It was found that the use of the ingestion scheme enhances the performance of the model when compared with its standard use based on solar activity drivers (R12 and F10.7), especially for high solar activity. As an example, the mean and standard deviation of the differences between experimental and reconstructed F2-peak values for April of year 2000 is 0.09 and 1.28 MHz for ingested IRI, compared to -0.81 and 1.27 MHz (IRI with R12 input) and -0.02 and 1.46 MHz (IRI with F10.7 input).

  12. The iris family (Iridaceae in the flora of eastern Indochina

    Directory of Open Access Journals (Sweden)

    L. V. Averyanov

    2016-03-01

    Full Text Available Iris family in the countries of eastern part of Indochina Peninsula, such as Cambodia, Laos and Viet­nam includes lone native genus – Iris L. with two aboriginal species – I. japonica Thunb. and I. tectorum Maxim. Iris japonica is often cultivated as an outdoor ornamental plant in mountainous regions in the northern Vietnam, where it occasionally naturalizes. Herbarium specimens of I. japonica, collected in central Laos near Nape town, probably represent southernmost locality of the Iris genus in Eurasia. Iris tectorum was discovered in native, primary plant communities of karstic highly eroded limestone in Cao Bang province (Bao Lac district of the northern Vietnam. This species is recorded as new for the flora of the Indochina Peninsula. The report of I. collettii Hook. f. on the territory of peninsular flora does not yet confirmed by herbaria and remains doubtful. Data on taxonomy, authentic specimens, distribution, habitats, phenology, conservation status and biology are provided for all Iris species. The identification key for Iris species is compiled, as well as dotted distribution maps on the territory of countries of eastern Indochina. Other representatives of the family from such genera as Belamcanda Adans. (B. chinensis (L. Redouté, Crocosmia Planch. (C. × crocosmiiflora (G. Nicholson N. E. Br., Eleutherine Herb. (E. bulbosa (Mill. Urb., Freesia Klatt (F. refracta (Jacq. Klatt., Gladiolus L. (numerous horticultural forms и Trimezia Salisb. ex Herb. (T. martinicensis (Jacq. Herb. reported from Indochina are introduced cultivated ornamental plants capable to occasional naturaliza­tion as an adventive element of the Indochinese flora.

  13. Japanese infrared survey mission IRIS (ASTRO-F)

    Science.gov (United States)

    Murakami, Hiroshi

    1998-08-01

    The IR Imaging Survey (IRIS) is the second IR astronomy mission of the Institute of Space and Astronomical Science (ISAS). The IRIS is a 70 cm cooled telescope dedicated for IR sky survey. This project has been approved as ISAS's 21st science mission 'ASTRO-F', and prototype model development has been ongoing since 1997. The IRIS will be launched with ISAS's launch vehicle M-V, into a sun-synchronous polar orbit with an altitude of 750 km. The IRIS telescope has a 70 cm aperture and is cooled to 6K using Stirling-cycle coolers and liquid helium. The primary and secondary mirrors are light-weight mirrors make of silicon carbide. Two focal- plane instruments are installed. One is the far-IR surveyor (FIS) which will survey the entire sky in the wavelength range from 50 to 200 micron with angular resolutions of 30- 50 arcsec. The other focal-plane instrument is the IR camera (IRC). It employs large-format detector arrays and will take deep images of selected sky regions in the near and mid IR range. The field of view of the IRC is 10 arcmin and the spatial resolution is approximately 2 arcsec. The IRIS has much higher sensitivity than that of the IRAS survey. The detection limits are 1-100 micro Jy in the near-MID IR and 10-100 mJy in the far IR. With the IRIS survey, great progress is expected in the research on evolution of galaxies, formation of stars and planets, dark matter and brown dwarfs. The IRIS is now scheduled to be launched in early 2003.

  14. Lesiones traumáticas en cráneos del sitio Paso Alsina 1: Explorando indicadores de violencia interpersonal en la transición Pampeano-Patagónica Oriental (Argentina Cranial traumatic lesions from Paso Alsina 1 site: Exploring indicators of interpersonal violence in the Eastern Pampean-Patagonian Transition, Argentina

    Directory of Open Access Journals (Sweden)

    Gustavo Flensborg

    2011-07-01

    Full Text Available En el presente trabajo se brinda información sobre lesiones traumáticas registradas en los cráneos de la colección osteológica proveniente del sitio arqueológico Paso Alsina 1 (partido de Patagones, provincia de Buenos Aires, Argentina, con el propósito de aportar nuevos datos que permitan discutir el rol de la violencia interpersonal en el área de transición pampeano-patagónica oriental. El sitio es un área exclusiva de inhumación, conformado por diez entierros secundarios múltiples cuya cronología se ubica en el Holoceno tardío final (ca. 500 años AP. La muestra está integrada por 56 individuos correspondientes a diferentes categorías sexo-etarias. Se describen los casos traumáticos relevados por cráneo y se discuten los resultados con aquellos provenientes de regiones aledañas (e.g., cuencas inferiores de los ríos Negro y Chubut y subregión Pampa Seca. Los resultados indicaron un bajo-moderado porcentaje de lesiones traumáticas, atribuidas a hechos de violencia interpersonal y/o accidentes en el ámbito doméstico y, en ocasiones, entre grupos corresidentes.This paper presents information about traumatic lesions recorded on crania from Paso Alsina 1 site, district of Patagones, Buenos Aires province, Argentina. The aim of the paper is to discuss the role of interpersonal violence in the eastern Pampean-Patagonian transition. The site is a clearly bounded area of inhumation made up of ten secondary multiple burials that belong to the final Late Holocene (ca. 500 BP. The sample consists of 56 individuals corresponding to different sex-age categories. The traumatic cases recorded on each cranium are described, and the results compared with those from neighboring regions (e.g., the lower basins of the Negro and Chubut rivers and the Dry Pampa subregion. The results indicate a low-moderate rate of traumatic lesions, the product of interpersonal violence and/or accidents in the domestic context, and, occasionally, violence

  15. Insight into Metabolic 1H-MRS Changes in Natalizumab Induced Progressive Multifocal Leukoencephalopathy Brain Lesions

    Directory of Open Access Journals (Sweden)

    Ruth Schneider

    2017-09-01

    Full Text Available BackgroundProgressive multifocal leukoencephalopathy (PML is a severe complication of immunosuppressive therapies, especially of natalizumab in relapsing–remitting multiple sclerosis (MS. Metabolic changes within PML lesions have not yet been described in natalizumab-associated PML in MS patients.ObjectiveTo study metabolic profiles in natalizumab-associated PML lesions of MS patients by 1H magnetic resonance spectroscopy (1H-MRS at different stages during the PML course. To assess changes associated with the occurrence of the immune reconstitution inflammatory syndrome (IRIS.Methods20 patients received 1H-MRS and imaging at 3 T either in the pre-IRIS, IRIS, early-post-PML, or late post-PML setting. Five of these patients received individual follow-up examinations, including the pre-IRIS or IRIS phase. Clinical worsening was described by changes in the Karnofsky Performance Scale (KPS and the expanded disability status scale (EDSS 1 year before PML and scoring at the time of 1H-MRS.ResultsIn PML lesions, increased levels of the Lip/Cr ratio, driven by rising of lipid and reduction of Creatine, were found before the occurrence of IRIS (p = 0.014 with a maximum in the PML–IRIS group (p = 0.004. By contrast, marked rises of Cho/Cr in PML lesions were detected exclusively during the IRIS phase (p = 0.003. The Lip/Cr ratio decreased to above-normal levels in early-post-PML (p = 0.007, compared to normal appearing white matter (NAWM and to normal levels in the late-post-PML group. NAA/Cho was reduced compared to NAWM in the pre-IRIS, IRIS, and early-post-PML group. In NAA/Cr, the same effect was seen in the pre-IRIS and early-post-PML group. These cross-sectional results were confirmed by the individual follow-up examinations of four patients. NAA/Cho, Cho/Cr, and the lipid rise relative to NAWM in PML lesions were significantly correlated with the residual clinical worsening (KPS change in post-PML patients (Spearman

  16. Design and implementation of an acquisition system for the photo-motor response of the iris.

    Science.gov (United States)

    Lopez, C; Chumbimuni, R; Bosnjak, A; Villanueva, C; Eblen-Zajjur, A

    2007-01-01

    This paper presents a new development of an automated system for: stimulation, acquisition and the pupilar image processing (it includes segmentation and visualization in real time), issued from the fhoto-motor and consensual response of the iris. The physician can observe in the system interface: a graphic representation of the variation and change of speed of diameter and pupilar area as a function of time, from both pupils. In addition the magnitudes of clinical parameters, such as: the largest and smaller pupilar diameter, the maximum and minimum pupilar area, the eccentricity of each pupil, jointly with the inter pupilar distance. These data have a great interest for diagnosis and evaluation of lesions or illnesses of the central nervous system [1], which constitute the third cause of death in Venezuela during the last five years [2]. However, in Venezuela, specialists do not have a system for quantifying the clinical parameters, neither carry out the graphic representations of these important parameters.

  17. Internal antecubital fold line: A new useful anatomical repair to identify the medial epicondyle and avoid iatrogenic ulnar nerve injury in patients with supracondylar fracture of the humerus Línea del pliegue antecubital interno: Un nuevo reparo anatómico útil para identificar la epitróclea y evitar lesiones iatrogénicas del nervio ulnar en pacientes con fractura supracondílea del humero

    Directory of Open Access Journals (Sweden)

    Luis José Cespedes

    2012-12-01

    ógrados cruzados, proporcionan la mejor estabilidad mecánica. La mayoría de los niños con fractura supracondílea presentan inflamación alrededor del codo, haciendo difícil la palpación de la epítroclea, aumentando el riesgo de lesión del nervio cubital. Objetivo: evaluar la correspondencia de la línea del pliegue antecubital interno con la epitróclea en pacientes con fractura supracondílea y la incidencia de las lesiones iatrogénicas del nervio cubital. Metodología: Realizamos una serie de casos clínicos. El primer grupo incluyó 56 niños con fractura supracondílea tipo III de Gartland, entre agosto de 2000 a septiembre de 2007, tratados con reducción cerrada y fijación con clavos cruzados retrógrados. El segundo grupo incluyó 241 (481 codos pacientes de consulta externa. En ambos grupos utilizamos la línea antecubital interna para identificar la epitróclea. Resultados: La prolongación de la línea del pliegue antecubital intersecó la epitróclea en todos los participantes del primer grupo. No hubo lesión iatrogénica del nervio cubital. En el segundo grupo la línea del pliegue antecubital intersecó la epitróclea en el 96.3% de los pacientes. Ningún paciente presentó lesión del nervio cubital. Conclusiones: La extensión de la línea de pliegue antecubital interno puede ser útil para la identificación de la epitróclea y así evitar lesiones iatrogénicas del nervio cubital. Salud UIS 2012; 44 (2: 9-14

  18. Prevención de la lesiones por sobreuso: relación del comportamiento del sistema músculotendinoso rotuliano y Aquíleo en la carrera y el entrenamiento excéntrico

    OpenAIRE

    Sanz-López, Fernando

    2015-01-01

    [ES] Las lesiones por sobreuso, especialmente a nivel tendinoso, se caracterizan por desarrollar cambios sin llegar en muchos casos a manifestaciones clínicas. Para determinar estos cambios en los tejidos existen varios métodos, siendo el uso de la Ecografta uno de los más extendidos por su fácil uso y aplicabilidad en la práctica clínica. No obstante, otros métodos, con escasas investigaciones previas, como la Termografia se añaden a este intento. En nuestro conocimiento, no ha sido estudiad...

  19. IRISpy: Analyzing IRIS Data in Python

    Science.gov (United States)

    Ryan, Daniel; Christe, Steven; Mumford, Stuart; Baruah, Ankit; Timothy, Shelbe; Pereira, Tiago; De Pontieu, Bart

    2017-08-01

    IRISpy is a new community-developed open-source software library for analysing IRIS level 2 data. It is written in Python, a free, cross-platform, general-purpose, high-level programming language. A wide array of scientific computing software packages have already been developed in Python, from numerical computation (NumPy, SciPy, etc.), to visualization and plotting (matplotlib), to solar-physics-specific data analysis (SunPy). IRISpy is currently under development as a SunPy-affiliated package which means it depends on the SunPy library, follows similar standards and conventions, and is developed with the support of of the SunPy development team. IRISpy’s has two primary data objects, one for analyzing slit-jaw imager data and another for analyzing spectrograph data. Both objects contain basic slicing, indexing, plotting, and animating functionality to allow users to easily inspect, reduce and analyze the data. As part of this functionality the objects can output SunPy Maps, TimeSeries, Spectra, etc. of relevant data slices for easier inspection and analysis. Work is also ongoing to provide additional data analysis functionality including derivation of systematic measurement errors (e.g. readout noise), exposure time correction, residual wavelength calibration, radiometric calibration, and fine scale pointing corrections. IRISpy’s code base is publicly available through github.com and can be contributed to by anyone. In this poster we demonstrate IRISpy’s functionality and future goals of the project. We also encourage interested users to become involved in further developing IRISpy.

  20. Developmental origin of the posterior pigmented epithelium of iris.

    Science.gov (United States)

    Wang, Xiaobing; Xiong, Kai; Lu, Lei; Gu, Dandan; Wang, Songtao; Chen, Jing; Xiao, Honglei; Zhou, Guomin

    2015-03-01

    Iris epithelium is a double-layered pigmented cuboidal epithelium. According to the current model, the neural retina and the posterior iris pigment epithelium (IPE) are derived from the inner wall of the optic cup, while the retinal pigment epithelium (RPE) and the anterior IPE are derived from the outer wall of the optic cup during development. Our current study shows evidence, contradicting this model of fetal iris development. We demonstrate that human fetal iris expression patterns of Otx2 and Mitf transcription factors are similar, while the expressions of Otx2 and Sox2 are complementary. Furthermore, IPE and RPE exhibit identical morphologic development during the early embryonic period. Our results suggest that the outer layer of the optic cup forms two layers of the iris epithelium, and the posterior IPE is the inward-curling anterior rim of the outer layer of the optic cup. These findings provide a reasonable explanation of how IPE cells can be used as an appropriate substitute for RPE cells.

  1. A Study on Iris Localization and Recognition on Mobile Phones

    Science.gov (United States)

    Park, Kang Ryoung; Park, Hyun-Ae; Kang, Byung Jun; Lee, Eui Chul; Jeong, Dae Sik

    2007-12-01

    A new iris recognition method for mobile phones based on corneal specular reflections (SRs) is discussed. We present the following three novelties over previous research. First, in case of user with glasses, many noncorneal SRs may happen on the surface of glasses and it is very difficult to detect genuine SR on the cornea. To overcome such problems, we propose a successive on/off dual illuminator scheme to detect genuine SRs on the corneas of users with glasses. Second, to detect SRs robustly, we estimated the size, shape, and brightness of the SRs based on eye, camera, and illuminator models. Third, the detected eye (iris) region was verified again using the AdaBoost eye detector. Experimental results with 400 face images captured from 100 persons with a mobile phone camera showed that the rate of correct iris detection was 99.5[InlineEquation not available: see fulltext.] (for images without glasses) and 98.9[InlineEquation not available: see fulltext.] (for images with glasses or contact lenses). The consequent accuracy of iris authentication was 0.05[InlineEquation not available: see fulltext.] of the EER (equal error rate) based on detected iris images.

  2. A Study on Iris Localization and Recognition on Mobile Phones

    Directory of Open Access Journals (Sweden)

    Dae Sik Jeong

    2007-11-01

    Full Text Available A new iris recognition method for mobile phones based on corneal specular reflections (SRs is discussed. We present the following three novelties over previous research. First, in case of user with glasses, many noncorneal SRs may happen on the surface of glasses and it is very difficult to detect genuine SR on the cornea. To overcome such problems, we propose a successive on/off dual illuminator scheme to detect genuine SRs on the corneas of users with glasses. Second, to detect SRs robustly, we estimated the size, shape, and brightness of the SRs based on eye, camera, and illuminator models. Third, the detected eye (iris region was verified again using the AdaBoost eye detector. Experimental results with 400 face images captured from 100 persons with a mobile phone camera showed that the rate of correct iris detection was 99.5% (for images without glasses and 98.9% (for images with glasses or contact lenses. The consequent accuracy of iris authentication was 0.05% of the EER (equal error rate based on detected iris images.

  3. The design and safety features of the IRIS reactor

    Energy Technology Data Exchange (ETDEWEB)

    Carelli, Mario D. E-mail: carellmd@westinghouse.com; Conway, L.E.; Oriani, L.; Petrovic, B.; Lombardi, C.V.; Ricotti, M.E.; Barroso, A.C.O.; Collado, J.M.; Cinotti, L.; Todreas, N.E.; Grgic, D.; Moraes, M.M.; Boroughs, R.D.; Ninokata, H.; Ingersoll, D.T.; Oriolo, F

    2004-05-01

    Salient features of the International Reactor Innovative and Secure (IRIS) are presented here. IRIS, an integral, modular, medium size (335 MWe) PWR, has been under development since the turn of the century by an international consortium led by Westinghouse and including over 20 organizations from nine countries. Described here are the features of the integral design which includes steam generators, pumps and pressurizer inside the vessel, together with the core, control rods, and neutron reflector/shield. A brief summary is provided of the IRIS approach to extended maintenance over a 48-month schedule. The unique IRIS safety-by-design approach is discussed, which, by eliminating accidents, at the design stage, or decreasing their consequences/probabilities when outright elimination is not possible, provides a very powerful first level of defense in depth. The safety-by-design allows a significant reduction and simplification of the passive safety systems, which are presented here, together with an assessment of the IRIS response to transients and postulated accidents.

  4. Human identification using correlation metrics of iris images

    Science.gov (United States)

    Celenk, Mehmet; Brown, Michael; Luo, Yi; Kaufman, Jason; Ma, Limin; Zhou, Qiang

    2005-01-01

    This paper presents work done based on second order statistical features including cross- and auto-correlations as well as co-occurrence matrices of iris images in an attempt to extract a simple, yet powerful, set of features of an iris as a biometric. Prior to our work, the most prevalent methods for iris identification include the frontier work based on the use of quadrature 2-D Gabor wavelets with the Hamming Distance-based classification [1,2], circular Gabor filters with a nearest feature line (NFL) classifier [3], dyadic wavelet transform with the zero-cross detectors [4], texture analysis [9] and transient signal [11], and independent component analysis (ICA) [7], and boundary localization [10]. Our method differs significantly from the earlier approaches to iris recognition in that it relies on the wide-sense stationary approximation to the texture and gray-level characteristics of irises, and aims to lend itself for a single-chip hardware implementation. Our preliminary results show that cross- and auto-correlators along with co-occurrence matrix features are highly likely to be prominent iris discriminators.

  5. Mechanism and clinical significance of prostaglandin-induced iris pigmentation.

    Science.gov (United States)

    Stjernschantz, Johan W; Albert, Daniel M; Hu, Dan-Ning; Drago, Filippo; Wistrand, Per J

    2002-08-01

    The new glaucoma drugs latanoprost, isopropyl unoprostone, travoprost, and bimatoprost cause increased pigmentation of the iris in some patients. The purpose of the present article is to survey the available preclinical and clinical data on prostaglandin-induced iris pigmentation and to assess the phenomenon from a clinical perspective. Most of the data have been obtained with latanoprost, and it appears that there is a predisposition to latanoprost-induced iris pigmentation in individuals with hazel or heterochromic eye color. As latanoprost and travoprost are selective agonists for the prostaglandin F(2alpha) receptor, it is likely that the phenomenon is mediated by this receptor. Several studies indicate that latanoprost stimulates melanogenesis in iridial melanocytes, and transcription of the tyrosinase gene is upregulated. The safety aspects of latanoprost-induced iris pigmentation have been addressed in histopathologic studies, and no evidence of harmful consequences of the side effect has been found. Although a final assessment of the clinical significance of prostaglandin-induced iris pigmentation currently is impossible to make, it appears that the only clear-cut disadvantage is a potential heterochromia between the eyes in unilaterally treated patients because the heterochromia is likely to be permanent, or very slowly reversible.

  6. Systemic and Ophthalmologic Findings in Patients with Iris Coloboma

    Directory of Open Access Journals (Sweden)

    Sevda Ertekin

    2013-01-01

    Full Text Available Pur po se: Ocular coloboma is a rare malformation resulting from defective closure of the embryonic optic fissure. It can affect iris, retina, choroid, optic disc or ciliary body. This study reviews the clinical diagnosis and the accompanying ocular and systemic abnormalities in cases of iris coloboma. Ma te ri al and Met hod: Sixteen eyes of ten patients referred to our clinic and diagnosed as iris coloboma were included in the study and were reviewed retrospectively. Re sults: Seven cases were sporadic, and three cases were familial. Isolated iris coloboma was present in only one case, and chorioretinal involvement was present in all the others. Seven cases had involvement of the optic disc. Other ocular anomalies were unilateral microphthalmia in 3 cases, unilateral anophthalmia in 1 case, and unilateral microcornea in one case. Strabismus was present in the familial cases. Dis cus si on: In patients, diagnosed with iris coloboma, routine eye examination should be completed, refractive errors should be corrected, and these patients must be follewed for amblyopia. If strabismus is concominant, surgery can be performed. For potential complications, patients should be checked at regular intervals. (Turk J Ophthalmol 2013; 43: 19-22

  7. Visual outcome after corneal transplantation for corneal perforation and iris prolapse in 37 horses

    DEFF Research Database (Denmark)

    Henriksen, Michala de Linde; Plummer, C. E.; Mangan, B.;

    2012-01-01

    We wanted to investigate the visual outcome of horses presented with iris prolapse and treated with corneal transplantation.......We wanted to investigate the visual outcome of horses presented with iris prolapse and treated with corneal transplantation....

  8. Fusion of phase congruency and harris algorithm for extraction of iris corner points

    CSIR Research Space (South Africa)

    Mabuza-Hocquet, G

    2015-12-01

    Full Text Available iris identification systems. Low cost devices used under uncontrolled environments acquire poor iris images with inconsistent illumination and specular reflections. These factors inflict challenges towards the accurate identification and extraction...

  9. Automatic localization of pupil using eccentricity and iris using gradient based method

    Science.gov (United States)

    Khan, Tariq M.; Aurangzeb Khan, M.; Malik, Shahzad A.; Khan, Shahid A.; Bashir, Tariq; Dar, Amir H.

    2011-02-01

    This paper presents a novel approach for the automatic localization of pupil and iris. Pupil and iris are nearly circular regions, which are surrounded by sclera, eyelids and eyelashes. The localization of both pupil and iris is extremely important in any iris recognition system. In the proposed algorithm pupil is localized using Eccentricity based Bisection method which looks for the region that has the highest probability of having pupil. While iris localization is carried out in two steps. In the first step, iris image is directionally segmented and a noise free region (region of interest) is extracted. In the second step, angular lines in the region of interest are extracted and the edge points of iris outer boundary are found through the gradient of these lines. The proposed method is tested on CASIA ver 1.0 and MMU Iris databases. Experimental results show that this method is comparatively accurate.

  10. Ethnicity prediction and classification from iris texture patterns: A survey on recent advances

    CSIR Research Space (South Africa)

    Mabuza-Hocquet, Gugulethu

    2017-03-01

    Full Text Available The prediction and classification of ethnicity based on iris texture patterns using image processing, artificial intelligence and computer vision techniques is still a recent topic in iris biometrics. While the large body of knowledge and research...

  11. Iris recognition using image moments and k-means algorithm.

    Science.gov (United States)

    Khan, Yaser Daanial; Khan, Sher Afzal; Ahmad, Farooq; Islam, Saeed

    2014-01-01

    This paper presents a biometric technique for identification of a person using the iris image. The iris is first segmented from the acquired image of an eye using an edge detection algorithm. The disk shaped area of the iris is transformed into a rectangular form. Described moments are extracted from the grayscale image which yields a feature vector containing scale, rotation, and translation invariant moments. Images are clustered using the k-means algorithm and centroids for each cluster are computed. An arbitrary image is assumed to belong to the cluster whose centroid is the nearest to the feature vector in terms of Euclidean distance computed. The described model exhibits an accuracy of 98.5%.

  12. Texture Feature Extraction and Classification for Iris Diagnosis

    Science.gov (United States)

    Ma, Lin; Li, Naimin

    Appling computer aided techniques in iris image processing, and combining occidental iridology with the traditional Chinese medicine is a challenging research area in digital image processing and artificial intelligence. This paper proposes an iridology model that consists the iris image pre-processing, texture feature analysis and disease classification. To the pre-processing, a 2-step iris localization approach is proposed; a 2-D Gabor filter based texture analysis and a texture fractal dimension estimation method are proposed for pathological feature extraction; and at last support vector machines are constructed to recognize 2 typical diseases such as the alimentary canal disease and the nerve system disease. Experimental results show that the proposed iridology diagnosis model is quite effective and promising for medical diagnosis and health surveillance for both hospital and public use.

  13. Evaluation of the Yellow IRIS. An automated method for urinalysis.

    Science.gov (United States)

    Roe, C E; Carlson, D A; Daigneault, R W; Statland, B E

    1986-11-01

    The authors evaluated the Yellow IRIS automated urinalysis instrument (International Remote Imaging Systems, Chatsworth, CA 91311) in terms of its analytic performance as well as its ease of use. The Yellow IRIS is a system using automated intelligence microscopy (AIM), coupled with a dipstick reader and specific gravity module. The instrument can handle up to 30 specimens per hour in the authors' setting as compared with 10 specimens per hour using a full manual urinalysis coupled with microscopic examination. The authors conclude that the Yellow IRIS performed better than the manual method in terms of precision, linearity, and throughput. In addition, the diagnostic yield using this system in terms of abnormal results was higher than would have been picked up by manual analysis alone.

  14. IRIS: A Generic Three-Dimensional Radiative Transfer Code

    CERN Document Server

    Ibgui, L; Lanz, T; Stehlé, C

    2012-01-01

    We present IRIS, a new generic three-dimensional (3D) spectral radiative transfer code that generates synthetic spectra, or images. It can be used as a diagnostic tool for comparison with astrophysical observations or laboratory astrophysics experiments. We have developed a 3D short-characteristic solver that works with a 3D nonuniform Cartesian grid. We have implemented a piecewise cubic, locally monotonic, interpolation technique that dramatically reduces the numerical diffusion effect. The code takes into account the velocity gradient effect resulting in gradual Doppler shifts of photon frequencies and subsequent alterations of spectral line profiles. It can also handle periodic boundary conditions. This first version of the code assumes Local Thermodynamic Equilibrium (LTE) and no scattering. The opacities and source functions are specified by the user. In the near future, the capabilities of IRIS will be extended to allow for non-LTE and scattering modeling. IRIS has been validated through a number of te...

  15. Avoiding iris trauma from phacoemulsification in eyes with iridoschisis.

    Science.gov (United States)

    Rozenberg, Israel; Seabra, Fabíola P

    2004-04-01

    Iridoschisis is a rare condition frequently associated with age-related cataract. Phacoemulsification can be difficult to perform in these eyes, as the detached iris fibrils that are typically present free float in the anterior chamber and are attracted to the phaco tip and the irrigation/aspiration handpiece port. We describe a technique for performing phacoemulsification in eyes with iridoschisis. In this technique, iris fibrils are held in place by 2 ophthalmic viscosurgical devices (OVDs) that are injected into the inferior portion of the anterior chamber. An elliptical capsulorhexis is made and limited to the superior half of the pupil for additional stability of the anterior chamber during surgery. The nucleus is chopped with a phaco chopper and a bent-tip, 22-gauge needle. Most of the phacoemulsification is performed under the anterior capsule. The iris comes into contact with the OVDs only and has no mechanical trauma.

  16. Analyzing the IAR with IRI During the Recent Solar Minimum

    Science.gov (United States)

    Ivanov, S.; Klenzing, J.; Simoes, F.

    2012-01-01

    The 2008-2009 solar minimum was deeper than any within the past century. As such, the performance of the empirical International Reference Ionosphere (IRI) model was impacted. This impact manifested as a disagreement between predicted and measured characteristic separation in frequency for a wave resonating within an Ionospheric Alfven Resonator (IAR). The predicted value of the characteristic was a factor of three lower than what was measured by the Communication/Navigation Outage Forecast System (C/NOFS). Analyzing the model performance and comparing output with measured ionospheric values showed that more than half of the inaccuracy could be explained by inaccuracies in the output of the model. The 2008-2009 solar minimum was outside of the bounds of the effectiveness of the empirical IRI model. Incorporating recent data measurements and new indices would increase the accuracy of IRI during this period.

  17. Thirty Years of Innovation in Seismology with the IRIS Consortium

    Science.gov (United States)

    Sumy, D. F.; Woodward, R.; Aderhold, K.; Ahern, T. K.; Anderson, K. R.; Busby, R.; Detrick, R. S.; Evers, B.; Frassetto, A.; Hafner, K.; Simpson, D. W.; Sweet, J. R.; Taber, J.

    2015-12-01

    The United States academic seismology community, through the National Science Foundation (NSF)-funded Incorporated Research Institutions for Seismology (IRIS) Consortium, has promoted and encouraged a rich environment of innovation and experimentation in areas such as seismic instrumentation, data processing and analysis, teaching and curriculum development, and academic science. As the science continually evolves, IRIS helps drive the market for new research tools that enable science by establishing a variety of standards and goals. This has often involved working directly with manufacturers to better define the technology required, co-funding key development work or early production prototypes, and purchasing initial production runs. IRIS activities have helped establish de-facto international standards and impacted the commercial sector in areas such as seismic instrumentation, open-access data management, and professional development. Key institutional practices, conducted and refined over IRIS' thirty-year history of operations, have focused on open-access data availability, full retention of maximum-bandwidth, continuous data, and direct community access to state-of-the-art seismological instrumentation and software. These practices have helped to cultivate and support a thriving commercial ecosystem, and have been a key element in the professional development of multiple generations of seismologists who now work in both industry and academia. Looking toward the future, IRIS is increasing its engagement with industry to better enable bi-directional exchange of techniques and technology, and enhancing the development of tomorrow's workforce. In this presentation, we will illustrate how IRIS has promoted innovations grown out of the academic community and spurred technological advances in both academia and industry.

  18. Anterior iris-claw lens implantation with single paracentesis

    Directory of Open Access Journals (Sweden)

    Ahmet Özer

    2011-11-01

    Full Text Available In this study, the technique and results of iris-claw intraocular lens (IOL implantation with corneal incision and single paracentesis were presented. Eighteen eyes of 18 patients who underwent iris-claw implantation surgery with a single paracentesis were included in this prospective study. Iris-claw lens was grasped by its forceps and placed into the anterior chamber through superior corneal opening. While IOL was held by forceps, a blunt enclavation spatula was introduced through inferior paracentesis. Then the spatula was directed toward underneath of iris through pupil and toward sides where iris was entrapped into the claw by gentle push of iris through the slotted center of the lens haptics. Mean age of patients was 54.28±25.21 years (7-76 years. Mean anterior chamber depth was 4.07±0.32 mm and mean keratometric power was 43.01±2.73 D. Preoperative BCVA was 20/63 or better in 8 (44.4% patients. At the first postoperative month BCVA was 20/63 or better in 14 (77.8% patients. Preoperative mean spherical refraction was +11.05±2.62 D, preoperative astigmatism was 2.15±0.85. Postoperative mean spherical refraction was - 0.58±0.25 D and mean astigmatism was - 1.92±0.67 D. The most frequent postoperative complication was mild corneal edema seen in three patients that resolved completely during the first week with medical treatment. Irisclaw IOL implantation can be performed easily with corneal incision and single paracentesis. Single paracentesis does not increase surgical time or cause inconvenience during the procedure.

  19. Detección del virus del papiloma humano de alto riesgo por captura híbrida II® según hallazgos citológicos en mujeres tratadas por lesiones escamosas intraepiteliales de cuello uterino, período 2006/2010 Detection of high risk human papillomavirus by hybrid capture II(r according cytological findings in women treated for squamous intraepithelial lesions of the cervix, period 2006/2010

    Directory of Open Access Journals (Sweden)

    Pamela Mongelós

    2013-03-01

    Full Text Available OBJETIVO: Determinar la frecuencia del virus de papiloma humano de alto riesgo oncogénico (HR-HPV por captura híbrida II (r (CH II(r según hallazgos citológicos en mujeres tratadas por lesiones escamosas intraepiteliales (SIL de cuello uterino. MATERIAL Y MÉTODO: Estudio descriptivo de corte transverso de una serie de casos, en donde se incluyeron 122 mujeres tratadas, 79 (65% por SIL de bajo grado (LSIL y 43 (35% por SIL de alto grado (HSIL que concurrieron al Laboratorio de HPV del Instituto de Investigaciones en Ciencias de la Salud, Universidad Nacional de Asunción, para realizarse un control post-tratamiento, periodo 2006/2010. RESULTADOS: Se observó un total del 28% (34/122 de mujeres tratadas por SIL positivas para HR-HPV, detectándose infección viral en un 20% de las mujeres con ausencia de SIL (NSIL (22/108, 83% de las mujeres con LSIL (10/12 y 100% de las mujeres con HSIL (2/2. De las 34 mujeres positivas para HR-HPV, 10 mujeres (29% presentaron valores altos (100 pg/mL o más de carga viral relativa, detectándose un aumento de casos positivos con la severidad de la lesión (28% NSIL, 30% LSIL, 50% HSIL. CONCLUSION: La detección de HR-HPV por CH II(r, así como los valores de carga viral relativa altos, en especial en mujeres con NSIL podrían ayudar a identificar mujeres tratadas con riesgo a desarrollar recidivas, contribuyendo así a fortalecer el programa de prevención de cáncer de cuello uterino. OBJECTIVE: To determinate the frequency of high risk human papillomavirus (HR-HPV by hybrid capture II (r (CH II(r, according cytology results in women treated for squamous intraepithelial lesions of the cervix (SIL. MATERIAL AND METHODS: A descriptive cross-sectional study of a series of cases that included 122 women treated, 79 (75% for low grade SIL (LSIL and 43 (35% for high grade SIL (HSIL attending at the HPV Laboratory at the Health Sciences Research Institute (IICS, National University of Asunción (UNA, for post

  20. Participación estudiantil en proyectos de intervención rural en salud: la experiencia IRIS-X en Perú

    Directory of Open Access Journals (Sweden)

    Andrea C. Rivas-Nieto

    2009-07-01

    Full Text Available Las actividades que integran el trabajo de campo, la ayuda social y la investigación han sido iniciativas promovidas por varias sociedades estudiantiles de diferentes universidades relacionadas con las ciencias de la salud. El objetivo del presente trabajo es describir la participación estudiantil de una universidad peruana en un proyecto en salud de participación y colaboración en espacios rurales o urbano-marginales denominado "Intervención Rural de Investigación y Saneamiento (IRIS". La décima versión (IRIS-X tuvo lugar del 4 al 8 de enero de 2009 en el centro poblado de Huaripampa (Ancash, Perú. Se realizó campañas de salud, sesiones educativas y trabajos de investigación en este periodo. El IRIS-X permitió a los alumnos aplicar los conocimientos adquiridos durante la formación universitaria y llevar a cabo proyectos de investigación científica desde el pregrado, contribuyendo sanitariamente a la población más pobrfe y desatendida del país.

  1. IRIS Toxicological Review of Ethylene Glycol Mono-Butyl ...

    Science.gov (United States)

    EPA released the draft report, Toxicological Review for Ethylene Glycol Mono-Butyl Ether , that was distributed to Federal agencies and White House Offices for comment during the Science Discussion step of the IRIS Assessment Development Process. Comments received from other Federal agencies and White House Offices are provided below with external peer review panel comments. EPA is conducting a peer review of the scientific basis supporting the human health hazard and dose-response assessment of EGBE that will appear on the Integrated Risk Information System (IRIS) database.

  2. Off-Angle Iris Correction using a Biological Model

    Energy Technology Data Exchange (ETDEWEB)

    Santos-Villalobos, Hector J [ORNL; Karakaya, Mahmut [ORNL; Barstow, Del R [ORNL; Boehnen, Chris Bensing [ORNL

    2013-01-01

    This work implements an eye model to simulate corneal refraction effects. Using this model, ray tracing is performed to calculate transforms to remove refractive effects in off-angle iris images when reprojected to a frontal view. The correction process is used as a preprocessing step for off-angle iris images for input to a commercial matcher. With this method, a match score distribution mean improvement of 11.65% for 30 degree images, 44.94% for 40 degree images, and 146.1% improvement for 50 degree images is observed versus match score distributions with unmodified images.

  3. Off-Angle Iris Correction using a Biological Model

    Energy Technology Data Exchange (ETDEWEB)

    Thompson, Joseph T [ORNL; Santos-Villalobos, Hector J [ORNL; Karakaya, Mahmut [ORNL; Barstow, Del R [ORNL; Bolme, David S [ORNL; Boehnen, Chris Bensing [ORNL

    2013-01-01

    This work implements an eye model to simulate corneal refraction effects. Using this model, ray tracing is performed to calculate transforms to remove refractive effects in off-angle iris images when reprojected to a frontal view. The correction process is used as a preprocessing step for off-angle iris images for input to a commercial matcher. With this method, a match score distribution mean improvement of 11.65% for 30 degree images, 44.94% for 40 degree images, and 146.1% improvement for 50 degree images is observed versus match score distributions with unmodi ed images.

  4. Comparisons of IRI global TEC maps with CODE GIMs

    CERN Document Server

    Coisson, P; Radicella, S M

    2002-01-01

    The Global Ionospheric Maps (GIM) produced at CODE are used in this work as experimental reference to evaluate the performance of IRI in predicting global vertical TEC during a period of high solar activity. The analysis has been done for the four seasons of year 2001, comparing monthly median GIMs for 12 different UTs. The attention is focused on the correct reproduction of large scale features like the equatorial anomaly or behavior at high latitudes, to understand where and under which conditions the IRI model could present unexpectable features.

  5. Iris image enhancement for feature recognition and extraction

    CSIR Research Space (South Africa)

    Mabuza, GP

    2012-10-01

    Full Text Available Gonzalez, R.C. and Woods, R.E. 2002. Digital Image Processing 2nd Edition, Instructor?s manual .Englewood Cliffs, Prentice Hall, pp 17-36. Proen?a, H. and Alexandre, L.A. 2007. Toward Noncooperative Iris Recognition: A classification approach using... for performing such tasks and yielding better accuracy (Gonzalez & Woods, 2002). METHODOLOGY The block diagram in Figure 2 demonstrates the processes followed to achieve the results. Figure 2: Methodology flow chart Iris image enhancement for feature...

  6. [The automatic iris map overlap technology in computer-aided iridiagnosis].

    Science.gov (United States)

    He, Jia-feng; Ye, Hu-nian; Ye, Miao-yuan

    2002-11-01

    In the paper, iridology and computer-aided iridiagnosis technologies are briefly introduced and the extraction method of the collarette contour is then investigated. The iris map can be overlapped on the original iris image based on collarette contour extraction. The research on collarette contour extraction and iris map overlap is of great importance to computer-aided iridiagnosis technologies.

  7. An Analysis on Better Testing than Training Performances on the Iris Dataset

    NARCIS (Netherlands)

    Schutten, Marten; Wiering, Marco

    2016-01-01

    The Iris dataset is a well known dataset containing information on three different types of Iris flowers. A typical and popular method for solving classification problems on datasets such as the Iris set is the support vector machine (SVM). In order to do so the dataset is separated in a set used fo

  8. Expression of defender against apoptotic death (DAD-1) in iris and dianthus petals

    NARCIS (Netherlands)

    Kop, van der D.A.M.; Ruys, G.; Dees, D.; Schoot, van der C.; Boer, de A.D.; Doorn, van W.G.

    2003-01-01

    The gene defender against apoptotic death (DAD-1) prevents programmed cell death in animal cells. We investigated the expression pattern of DAD-1 in petals of iris (Iris x hollandica cv. Blue Magic) and carnation (Dianthus caryophyllus cv. Etarro). DAD-1 expression in Iris petals was strongly reduce

  9. IRIS Toxicological Review of Ethyl Tertiary Butyl Ether (Etbe) (Public Comment Draft)

    Science.gov (United States)

    In September 2016, the U.S. Environmental Protection Agency's (USEPA) released the draft Integrated Risk Information System (IRIS) Toxicological Review of Ethyl Tertiary Butyl Ether (ETBE). Consistent with the 2013 IRIS Enhancements, draft IRIS assessments are released prior to e...

  10. LESIONES MORTALES DE TRÁFICO EN ESPAÑA RELACIONADAS CON EL TRABAJO SEGÚN EL MOTIVO DEL DESPLAZAMIENTO Y SEGÚN SEXO (2010-2013

    Directory of Open Access Journals (Sweden)

    María López-Ruiz

    2017-01-01

    Full Text Available La mayoría de los estudios sobre las lesiones de tráfico relacionadas con el trabajo (LTT en España se basan en información de la administración laboral. El objetivo de este estudio fue realizar una descripción de las LTT mortales en España según el motivo de desplazamiento entre 2010 y 2013. Métodos: Estudio descriptivo de las LTT mortales ocurridas en personas conductoras de entre 16 y 70 años, cuyo motivo de desplazamiento fue registrado como laboral por la administración de tráfico, sea durante la jornada laboral o in itinere, entre 2010 y 2013. Para todas las variables de interés se calculó el número absoluto y relativo (en porcentaje si la variable era categórica o bien la media aritmética si la variable era continua. Para valorar diferencias estadísticamente significativas en función del motivo de desplazamiento (en jornada e in itinere en las distribuciones de las variables incluidas, separadamente para hombres y mujeres, se calcularon los tests estadísticos adecuados para cada variable. Se incluyeron variables relacionadas con la persona conductora, el tipo de vehículo y las condiciones del desplazamiento. Resultados: El total de LTT mortales fue de 847, el 88,3% en hombres y el 53,1% durante la jornada laboral. Las LTT mortales ocurridas en jornada en los hombres fueron significativamente más frecuentes en jornada cuando el conductor era un profesional (74,7%, con un vehículo industrial o furgoneta (67,7% y un desplazamiento previsto de más de 50km (60,5%. En las mujeres, las colisiones mortales ocurrieron principalmente in itinere y fueron en conductora particular (98,7%, con un turismo o motocicleta (98,7% y en un desplazamiento previsto de menos de 50km (79,6%. Conclusión: Estos resultados muestran un patrón diferente de las LTT mortales según sea el motivo del desplazamiento, en jornada o in itinere, que afecta de manera distinta a hombres y mujeres, lo que debe estudiarse con más profundidad para

  11. Developmental validation of the IrisPlex system: determination of blue and brown iris colour for forensic intelligence.

    Science.gov (United States)

    Walsh, Susan; Lindenbergh, Alexander; Zuniga, Sofia B; Sijen, Titia; de Knijff, Peter; Kayser, Manfred; Ballantyne, Kaye N

    2011-11-01

    The IrisPlex system consists of a highly sensitive multiplex genotyping assay together with a statistical prediction model, providing users with the ability to predict blue and brown human eye colour from DNA samples with over 90% precision. This 'DNA intelligence' system is expected to aid police investigations by providing phenotypic information on unknown individuals when conventional DNA profiling is not informative. Falling within the new area of forensic DNA phenotyping, this paper describes the developmental validation of the IrisPlex assay following the Scientific Working Group on DNA Analysis Methods (SWGDAM) guidelines for the application of DNA-based eye colour prediction to forensic casework. The IrisPlex assay produces complete SNP genotypes with only 31pg of DNA, approximately six human diploid cell equivalents, and is therefore more sensitive than commercial STR kits currently used in forensics. Species testing revealed human and primate specificity for a complete SNP profile. The assay is capable of producing accurate results from simulated casework samples such as blood, semen, saliva, hair, and trace DNA samples, including extremely low quantity samples. Due to its design, it can also produce full profiles with highly degraded samples often found in forensic casework. Concordance testing between three independent laboratories displayed reproducible results of consistent levels on varying types of simulated casework samples. With such high levels of sensitivity, specificity, consistency and reliability, this genotyping assay, as a core part of the IrisPlex system, operates in accordance with SWGDAM guidelines. Furthermore, as we demonstrated previously, the IrisPlex eye colour prediction system provides reliable results without the need for knowledge on the bio-geographic ancestry of the sample donor. Hence, the IrisPlex system, with its model-based prediction probability estimation of blue and brown human eye colour, represents a useful tool for

  12. Plateau iris Íris em platô

    Directory of Open Access Journals (Sweden)

    Alberto Diniz Filho

    2008-10-01

    Full Text Available The term plateau iris was first coined in 1958 to describe the iris configuration of a patient. Two years later the concept of plateau iris was published. In 1977, the plateau iris configuration was classically defined as presurgical changes of an eye with a relative normal central anterior chamber depth, flat iris by conventional biomicroscopy, but displaying an extremely narrow or closed angle on gonioscopic examination. On the other hand, the plateau iris syndrome was defined as an acute glaucoma crisis in one eye with a relative normal central anterior chamber depth and patent iridotomy on direct examination, presenting angle closure confirmed by gonioscopic examination after mydriasis. In 1992, the anatomic aspects of plateau iris were studied using ultrasound biomicroscopy. Finally, plateau iris has been considered an anatomic variant of iris structure in which the iris periphery angulates sharply forward from its insertion point and then again angulates sharply and centrally backward, along with an anterior positioning of the ciliary processes seen on ultrasound biomicroscopy. The clinical treatment of plateau iris syndrome is carried out with topical use of pilocarpine. However, the definitive treatment should be fulfilled by performing an argon laser peripheral iridoplasty.O termo íris em platô foi primeiramente inventado em 1958 para descrever a configuração da íris de um paciente. Dois anos depois o conceito de íris em platô foi publicado. Em 1977, a configuração de íris em platô foi classicamente definida como alterações pré-cirúrgicas de um olho com uma profundidade de câmara anterior relativamente normal, íris plana pela biomicroscopia convencional, mas mostrando um ângulo extremamente estreito ou fechado pela gonioscopia. Por outro lado, a síndrome de íris em platô foi definida como uma crise de glaucoma agudo em um olho com uma profundidade de câmara anterior relativamente normal e uma iridectomia patente ao

  13. Lesiones atípicas benignas de mama en mujeres mayores de 25 años con diagnóstico de imagen BI-RADS® IV confirmados con estudio histopatológico en la clínica de mama del Hospital de Especialidades Eugenio Espejo en el periodo 2011-2013

    OpenAIRE

    Castillo Ortiz, Ana María

    2015-01-01

    Antecedentes: Las lesiones mamarias benignas pueden simular carcinoma en estudios radiológicos y es imprescindible analizarlas histológicamente para definir el diagnóstico, debiendo considerar el riesgo relativo (RR) de desarrollar cáncer futuro. Objetivo: Determinar la prevalencia de lesiones atípicas benignas de mama en mujeres mayores de 25 años, BI-RADS® IV, confirmadas con histopatología, en la Clínica de Mama del Hospital de Especialidades Eugenio Espejo, periodo 2011-2013, caracterís...

  14. Lesiones atípicas benignas de mama en mujeres mayores de 25 años con diagnóstico de imagen BI-RADS® IV confirmados con estudio histopatológico en la clínica de mama del Hospital de Especialidades Eugenio Espejo en el periodo 2011-2013

    OpenAIRE

    Castillo Ortiz, Ana María

    2015-01-01

    Antecedentes: Las lesiones mamarias benignas pueden simular carcinoma en estudios radiológicos y es imprescindible analizarlas histológicamente para definir el diagnóstico, debiendo considerar el riesgo relativo (RR) de desarrollar cáncer futuro. Objetivo: Determinar la prevalencia de lesiones atípicas benignas de mama en mujeres mayores de 25 años, BI-RADS® IV, confirmadas con histopatología, en la Clínica de Mama del Hospital de Especialidades Eugenio Espejo, periodo 2011-2013, caracterís...

  15. Programa clínico integral del manejo de lesiones musculoesqueléticas para mejorar la calidad de vida de las personas que acuden al consultorio de medicina homotoxicológica, rehabilitación y terapia física

    OpenAIRE

    Romero Rivera, Vinicio Misael

    2015-01-01

    La presente investigación tuvo la finalidad de diseñar un programa clínico integral para mejorar la calidad de vida de los pacientes con lesiones osteomioarticulares, se investigó a 104 pacientes (55hombres y 49 mujeres) que acudieron el mes de septiembre del 2014 al consultorio de medicina Homotoxicológica Rehabilitación y Terapia Física ubicado en la ciudad de Ambato barrio Huachi Loreto. En esta investigación de tipo descriptiva se encontró personas con diagnósticos de lesiones musculoe...

  16. Delay of Iris flower senescence by protease inhibitors

    NARCIS (Netherlands)

    Pak, C.; Doorn, van W.G.

    2005-01-01

    asterisk inside a circle sign Visible senescence of the flag tepals in Iris x hollandica (cv. Blue Magic) was preceded by a large increase in endoprotease activity. Just before visible senescence about half of total endoprotease activity was apparently due to cysteine proteases, somewhat less than h

  17. Daffodil flower delay senescence in cut Iris flowers

    NARCIS (Netherlands)

    Doorn, van W.G.; Sinz, A.; Tomassen, M.M.M.

    2004-01-01

    Visible symptoms of tepal senescence in cut Iris x hollandica (cv. Blue Magic) flowers were delayed by placing one cut daffodil flower (Narcissus pseudonarcissus, cv. Carlton) in the same vase. Addition of mucilage, exuded by daffodil stems, to the vase water had the same effect as the flowering daf

  18. IRIS Toxicological Review of Acrylamide (External Review Draft)

    Science.gov (United States)

    EPA has conducted a peer review by EPA’s Science Advisory Board (SAB) of the scientific basis supporting the human health hazard and dose-response assessment of acrylamide that once finalized will appear on the Integrated Risk Information System (IRIS) database. Peer review is m...

  19. The Infrared Imaging Spectrograph (IRIS) for TMT: Data Reduction System

    CERN Document Server

    Walth, Gregory; Weiss, Jason; Larkin, James E; Moore, Anna M; Chapin, Edward L; Do, Tuan; Dunn, Jennifer; Ellerbroek, Brent; Gillies, Kim; Hayano, Yutaka; Johnson, Chris; Marshall, Daniel; Riddle, Reed L; Simard, Luc; Sohn, Ji Man; Suzuki, Ryuji; Wincensten, James

    2016-01-01

    IRIS (InfraRed Imaging Spectrograph) is the diffraction-limited first light instrument for the Thirty Meter Telescope (TMT) that consists of a near-infrared (0.84 to 2.4 $\\mu$m) imager and integral field spectrograph (IFS). The IFS makes use of a lenslet array and slicer for spatial sampling, which will be able to operate in 100's of different modes, including a combination of four plate scales from 4 milliarcseconds (mas) to 50 mas with a large range of filters and gratings. The imager will have a field of view of 34$\\times$34 arcsec$^{2}$ with a plate scale of 4 mas with many selectable filters. We present the preliminary design of the data reduction system (DRS) for IRIS that need to address all of these observing modes. Reduction of IRIS data will have unique challenges since it will provide real-time reduction and analysis of the imaging and spectroscopic data during observational sequences, as well as advanced post-processing algorithms. The DRS will support three basic modes of operation of IRIS; reduc...

  20. Intraocular lens iris fixation. Clinical and macular OCT outcomes

    Directory of Open Access Journals (Sweden)

    Garcia-Rojas Leonardo

    2012-10-01

    Full Text Available Abstract Background To assess the efficacy, clinical outcomes, visual acuity (VA, incidence of adverse effects, and complications of peripheral iris fixation of 3-piece acrylic IOLs in eyes lacking capsular support. Thirteen patients who underwent implantation and peripheral iris fixation of a 3-piece foldable acrylic PC IOL for aphakia in the absence of capsular support were followed after surgery. Clinical outcomes and macular SD-OCT (Cirrus OCT; Carl Zeiss Meditec, Germany were analyzed. Findings The final CDVA was 20/40 or better in 8 eyes (62%, 20/60 or better in 12 eyes (92%, and one case of 20/80 due to corneal astigmatism and mild persistent edema. No intraoperative complications were reported. There were seven cases of medically controlled ocular hypertension after surgery due to the presence of viscoelastic in the AC. There were no cases of cystoid macular edema, chronic iridocyclitis, IOL subluxation, pigment dispersion, or glaucoma. Macular edema did not develop in any case by means of SD-OCT. Conclusions We think that this technique for iris suture fixation provides safe and effective results. Patients had substantial improvements in UDVA and CDVA. This surgical strategy may be individualized however; age, cornea status, angle structures, iris anatomy, and glaucoma are important considerations in selecting candidates for an appropriate IOL fixation method.

  1. Interface Region Imaging Spectrograph (IRIS) entrance aperture design

    Science.gov (United States)

    Cheimets, P.; Park, S.; Bergner, H.; Chou, C.; Gates, R.; Honsa, M.; Podgorski, W.; Yanari, C.

    2014-07-01

    The Interface Region Imaging Spectrograph (IRIS) is a complementary follow-on to Solar Dynamics Observatory Atmospheric Imaging Assembly (SDO-AIA) and funded as a member of the NASA SMEX program. This paper presents the thermal design of the IRIS telescope front end, with a focus on the IRIS door and entrance aperture assembly. The challenge of the IRIS entrance aperture, including the door design, was to manage the solar flux, both before and after the door was opened. This is especially a problem with instruments that are permanently pointed directly at the sun. Though there is an array of effective flux-rejecting coatings, they are expensive, hard to apply, harder to measure, delicate, prone to unpredictable performance decay with exposure, and very often a source of contamination. This paper presents a thermal control and protection method based on robust, inexpensive coatings and materials, combined to produce high thermal and structural isolation. The end result is a first line of thermal protection whose performance is easy to predict and well isolated from the instrument it is protecting.

  2. Drop-out probabilities of IrisPlex SNP alleles

    DEFF Research Database (Denmark)

    Andersen, Jeppe Dyrberg; Tvedebrink, Torben; Mogensen, Helle Smidt

    2013-01-01

    -out of true alleles is possible. As part of the validation of the IrisPlex assay in our ISO17025 accredited, forensic genetic laboratory, we estimated the probability of drop-out of specific SNP alleles using 29 and 30 PCR cycles and 25, 50 and 100 Single Base Extension (SBE) cycles. We observed no drop...

  3. A Field Study of an Iris Identification System

    Science.gov (United States)

    2008-05-01

    and hygiene problems associated with finger scanning); fast; and highly individualistic (with an estimated 173 bits of entropy in each iris template[4...IEEE, May 3–6 1998. [5] G. Doddington, W. Liggett, A. Martin, M. Przybocki, and D. Reynolds. Sheep, goats, lambs and wolves a statistical analysis of

  4. IRIS Toxicological Review of Tetrachloroethylene (Perchloroethylene) (External Review Draft)

    Science.gov (United States)

    EPA conducted a peer review of the scientific basis supporting the human health hazard and dose-response assessment of tetrachloroethylene that will appear on the Integrated Risk Information System (IRIS) database. Peer review is meant to ensure that science is used credibly and ...

  5. IRIS Toxicological Review of Ethylene Glycol Mono Butyl ...

    Science.gov (United States)

    EPA has finalized the Toxicological Review of Ethylene Glycol Mono Butyl Ether: in support of the Integrated Risk Information System (IRIS). Now final, this assessment may be used by EPA’s program and regional offices to inform decisions to protect human health. N/A

  6. IRIS Toxicological Review of Methanol (External Review Draft, 2013)

    Science.gov (United States)

    EPA is conducting a peer review and public comment of the scientific basis supporting the human health hazard and dose-response assessment of methanol (non-cancer) that when finalized will appear on the Integrated Risk Information System (IRIS) database.

  7. IRIS Toxicological Review of Methanol (Noncancer) (Interagency Science Discussion Draft)

    Science.gov (United States)

    On May 3, 2013, the Toxicological Review of Methanol (noncancer) (Revised External Review Draft) was posted for public review and comment. Subsequently, the draft Toxicological Review, Appendices, and draft IRIS Summary were reviewed internally by EPA and by other federal agenci...

  8. The infrared imaging spectrograph (IRIS) for TMT: sensitivities and simulations

    CERN Document Server

    Wright, Shelley A; Larkin, James E; Moore, Anna M; Crampton, David; Simard, Luc

    2010-01-01

    We present sensitivity estimates for point and resolved astronomical sources for the current design of the InfraRed Imaging Spectrograph (IRIS) on the future Thirty Meter Telescope (TMT). IRIS, with TMT's adaptive optics system, will achieve unprecedented point source sensitivities in the near-infrared (0.84 - 2.45 {\\mu}m) when compared to systems on current 8-10m ground based telescopes. The IRIS imager, in 5 hours of total integration, will be able to perform a few percent photometry on 26 - 29 magnitude (AB) point sources in the near-infrared broadband filters (Z, Y, J, H, K). The integral field spectrograph, with a range of scales and filters, will achieve good signal-to-noise on 22 - 26 magnitude (AB) point sources with a spectral resolution of R=4,000 in 5 hours of total integration time. We also present simulated 3D IRIS data of resolved high-redshift star forming galaxies (1 < z < 5), illustrating the extraordinary potential of this instrument to probe the dynamics, assembly, and chemical abunda...

  9. IRIS Toxicological Review of Acrylamide (External Review Draft)

    Science.gov (United States)

    EPA has conducted a peer review by EPA’s Science Advisory Board (SAB) of the scientific basis supporting the human health hazard and dose-response assessment of acrylamide that once finalized will appear on the Integrated Risk Information System (IRIS) database. Peer review is m...

  10. Preface: The International Reference Ionosphere (IRI) at equatorial latitudes

    Science.gov (United States)

    Reinisch, Bodo; Bilitza, Dieter

    2017-07-01

    This issue of Advances in Space Research includes papers that report and discuss improvements of the International Reference Ionosphere (IRI). IRI is the international standard for the representation of the plasma in Earth's ionosphere and recognized as such by the Committee on Space Research (COSPAR), the International Union of Radio Science (URSI), the International Telecommunication Union (ITU), and the International Standardization Organization (ISO). As requested, particularly by COSPAR and URSI, IRI is an empirical model relying on most of the available and reliable ground and space observations of the ionosphere. As new data become available and as older data sources are fully exploited the IRI model undergoes improvement cycles to stay as close to the existing data record as possible. The latest episode of this process is documented in the papers included in this issue using data from the worldwide network of ionosondes, from a few of the incoherent scatter radars, from the Alouette and ISIS topside sounders, and from the Global Navigation Satellite Systems (GNSS). The focus of this issue is on the equatorial and low latitude region that is of special importance for ionospheric physics because it includes the largest densities and steep density gradients in the double hump latitudinal structure, the Equatorial Ionization Anomaly (EIA), which is characteristic for this region.

  11. Gene expression during anthesis and senescence in Iris flowers

    NARCIS (Netherlands)

    Doorn, van W.G.; Balk, P.A.; Houwelingen, van A.M.; Hoebrechts, F.A.; Hall, R.D.; Vorst, O.; Schoot, van der C.; Wordragen, van M.F.

    2003-01-01

    We investigated changes in gene expression in Iris hollandicaflowers by microarray technology. Flag tepals were sampled daily, from three days prior to flower opening to the onset of visible senescence symptoms. Gene expression profiles were compared with biochemical data including lipid and protein

  12. Delay of Iris flower senescence by protease inhibitors

    NARCIS (Netherlands)

    Pak, C.; Doorn, van W.G.

    2005-01-01

    asterisk inside a circle sign Visible senescence of the flag tepals in Iris x hollandica (cv. Blue Magic) was preceded by a large increase in endoprotease activity. Just before visible senescence about half of total endoprotease activity was apparently due to cysteine proteases, somewhat less than

  13. IRIS Toxicological Review of Libby Amphibole Asbestos (Final Report)

    Science.gov (United States)

    EPA has finalized the, Toxicological Review of Libby Amphibole Asbestos: in support of the Integrated Risk Information System (IRIS). Now final, this assessment may be used by EPA’s program and regional offices to inform decisions to protect human health.

  14. Comparison of ionospheric radio occultation CHAMP data with IRI 2001

    Directory of Open Access Journals (Sweden)

    N. Jakowski

    2004-01-01

    Full Text Available GPS radio occultation measurements on board low Earth orbiting satellites can provide vertical electron density profiles of the ionosphere from satellite orbit heights down to the bottomside. Ionospheric radio occultation (IRO measurements carried out onboard the German CHAMP satellite mission since 11 April 2001 were used to derive vertical electron density profiles (EDP’s on a routine basis. About 150 vertical electron density profiles may be retrieved per day thus providing a huge data basis for testing and developing ionospheric models. Although the validation of the EDP retrievals is not yet completed, the paper addresses a systematic comparison of about 78 000 electron density profiles derived from CHAMP IRO data with the International Reference Ionosphere (IRI 2001. The results are discussed for quite different geophysical conditions, e.g. as a function of latitude, local time and geomagnetic activity. The comparison of IRO data with corresponding IRI data indicates that IRI generally overestimates the upper part of the ionosphere whereas it underestimates the lower part of the ionosphere under high solar activity conditions. In a first order correction this systematic deviation could be compensated by introducing a height dependence correction factor in IRI profiling.

  15. In Vitro Antimicrobial Activity of Iris pseudacorus and Urtica dioica

    Directory of Open Access Journals (Sweden)

    Maryam Ramtin

    2014-03-01

    Full Text Available Background: In this study, the effects of antibacterial activity of Urtica dioica and Iris pseudacorus essential oils, native plant northern of Iran, were investigated for some selected bacteria. Material and Methods: The influence of essential oils was tested by the using of disk diffusion and micro-broth dilution methods against standard strains of the picked out bacteria. Gas Chromatography/Mass Spectroscopy (GC/MS analysis, bioactivity determination, Minimum inhibitory concentrations (MIC and minimum bactericidal concentration (MBC of essential oils were utilized for this goal. Results: This study showed that, Inhibition zone diameter varied from 11 to 19 mm and 9 to 17 mm for Urtica dioica and Iris pseudacorus respectively. In contrast, this figure fluctuated from 19 to 28 mm and 7 to 17 mm for gentamicin and ampicillin separately. By the application of micro-broth dilution technique, MICs for 1% essential oils were 1.8-7.5 μg/ml and 3.75-15 μg/ml for, Urtica dioica and Iris pseudacorus against gram-positive and gram-negative bacteria individually. Furthermore, the MBCs of herbal essences were 1.8-15 μg/ml for, Urtica dioica and 15-30 μg/ml for Iris. Conclusion: The application of essential oils for the bio-control of diseases, as a novel emerging alternative to antimicrobial treatments, lead to safer and more environmental management for infective diseases4T.4T

  16. Comparación de estrategias del cribado primario de lesiones de alto grado y cáncer de cuello de útero en población de Córdoba: el papel de la citología cervical y la determinación de adn del virus del papiloma humano

    OpenAIRE

    Ilic, Igor

    2011-01-01

    El objetivo principal del estudio es comparar la eficacia de las técnicas de cribado del cáncer de cuello del útero habitualmente utilizadas en nuestro medio; citología cervical triple de Wied y detección del ADN de VPH, utilizadas como pruebas únicas ó conjuntamente en pacientes de nuestra población. Objetivo secundario es determinar la contribución relativa de la infección por distintos genotipos del VPH de alto riesgo oncogénico en el desarrollo de anormalidades histológicas CIN 2, CIN 3 y...

  17. Design and performance of a cryogenic iris aperture mechanism

    Science.gov (United States)

    de Jonge, C.; Laauwen, W. M.; de Vries, E. A.; Smit, H. P.; Detrain, A.; Eggens, M. J.; Ferrari, L.; Dieleman, P.

    2014-07-01

    A cryogenic iris mechanism is under development as part of the ground calibration source for the SAFARI instrument. The iris mechanism is a variable aperture used as an optical shutter to fine-tune and modulate the absolute power output of the calibration source. It has 4 stainless steel blades that create a near-circular aperture in every position. The operating temperature is 4.5 Kelvin to provide a negligible background to the SAFARI detectors, and `hot spots' above 9K should be prevented. Cryogenic testing proved that the iris works at 4K. It can be used in a broad range of cryogenic optical instruments where optical throughput needs to be controlled. Challenges in the design include the low cooling power available (5mW) and low friction at cryogenic temperatures. The actuator is an `arc-type' rotary voice-coil motor. The use of flexural pivots creates a mono-stable mechanism with a resonance frequency at 26Hz. Accurate and fast position control with disturbance rejection is managed by a PID servo loop using a hall-sensor as input. At 4 Kelvin, the frequency is limited to 4Hz to avoid excess dissipation and heating. In this paper, the design and performance of the iris are discussed. The design was optimized using a thermal, magnetic and mechanical model made with COMSOL Finite Element Analysis software. The dynamical and state-space modeling of the mechanism and the concept of the electrical control are presented. The performance of the iris show good agreement to the analytical and COMSOL modeling.

  18. The Interface Region Imaging Spectrograph (IRIS) NASA SMEX

    Science.gov (United States)

    Lemen, James; Title, A.; De Pontieu, B.; Schrijver, C.; Tarbell, T.; Wuelser, J.; Golub, L.; Kankelborg, C.

    2011-05-01

    The solar chromosphere and transition region (TR) is highly structured, dynamic, and intimately connected to the corona. It requires more than ten times the energy required to heat the corona, and yet it has received far less interest because of the complexity of the required observational and analytical tools. In the TR the density drops by six orders of magnitude and the temperature increases by three orders of magnitude. Hinode observations reveal the importance the magnetic field has on this region of the solar atmosphere that acts as the interface between the photosphere and the corona. The Interface Region Imaging Spectrograph (IRIS) was selected for a NASA SMEX mission in 2009 and is scheduled to launch in December 2012. IRIS addresses critical questions in order to understand the flow of energy and mass through the chromosphere and TR, namely: (1) Which types of non-thermal energy dominate in the chromosphere and beyond? (2) How does the chromosphere regulate mass and energy supply to the corona and heliosphere? (3) How do magnetic flux and matter rise through the lower atmosphere, and what roles dos flux emergence play in flares and mass ejections? These questions are addressed with a high-resolution imaging spectrometer that observes Near- and Far-VU emissions that are formed at temperatures between 5,000K and 1.5 x 106 K. IRIS has a field-of-view of 120 arcsec, a spatial resolution of 0.4 arcsec, and velocity resolution of 0.5 km/s. Members of the IRIS investigation team are developing advanced radiative MHD codes to facilitate comparison with and interpretation of observations. We present the status of the IRIS observatory development, which completed its Critical Design Review in December 2010.

  19. Alpha antagonists and intraoperative floppy iris syndrome: A spectrum

    Directory of Open Access Journals (Sweden)

    Sharif A Issa

    2008-07-01

    Full Text Available Sharif A Issa, Omar H Hadid, Oliver Baylis, Margaret DayanDepartment of Ophthalmology, Royal Victoria Infirmary, Newcastle upon Tyne, UKBackground: To determine occurrence of features of intraoperative floppy iris syndrome (IFIS during cataract surgery in patients taking systemic alpha-antagonists (AA.Methods: We prospectively studied patients on AA and who underwent phacoemulsification. The following were recorded: pupil diameter preoperatively, iris flaccidity, iris prolapse and peroperative miosis.Results: We studied 40 eyes of 31 subjects. Mean age was 78 years. Overall, 14 eyes (13 patients showed signs of IFIS: 9/13 (69% eyes of patients on tamsulosin, 1/18 (6% eyes in the doxazosin group, 2/2 prazosin patients, 1/4 eyes in the indoramin group, and 1/2 eyes in two patients on a combination of doxazosin and tamsulosin. Most cases (92% had only one or two signs of IFIS. Bilateral cataract surgery was undertaken in 9 patients but only one patient (on tamsulosin had features of IFIS in both eyes, while 4 patients (2 on tamsulosin and 2 on other AA showed signs of IFIS in one eye only, and 4 patients did not show IFIS in either eye.Conclusion: Most AA were associated with IFIS, but it tends to present as a spectrum of signs rather than full triad originally described. Tamsulosin was most likely to be associated with IFIS; however, its intake does not necessarily mean that IFIS will occur. For patients on AA, the behavior of the iris intraoperatively in one eye is a poor predictor of the other eye. Surgeons should anticipate the occurrence of IFIS in any patient on AA.Keywords: alpha blocker, alpha antagonist, cataract surgery, intraoperative floppy iris syndrome, tamsulosin.

  20. Topography of Lymphatic Markers in Human Iris and Ciliary Body.

    Science.gov (United States)

    Kaser-Eichberger, Alexandra; Schrödl, Falk; Trost, Andrea; Strohmaier, Clemens; Bogner, Barbara; Runge, Christian; Motloch, Karolina; Bruckner, Daniela; Laimer, Martin; Schlereth, Simona L; Heindl, Ludwig M; Reitsamer, Herbert A

    2015-07-01

    Reports of lymphatics in the anterior human uvea are contradictory. This might be caused due to a certain topography, which has not been considered yet. Therefore, here we systematically analyze iris and adjacent ciliary body with immunohistochemistry by combining various lymphatic markers. Human iris and ciliary body were obtained from cornea donors and prepared for cryosectioning. Cross sections of tissue blocks at 12/3/6/9 o'clock position and at corresponding intersections (1:30/4:30/7:30/10:30) were processed for immunohistochemistry of LYVE-1, PDPN, PROX1, FOXC2, VEGFR3, and CCL21, and when necessary, these lymphatic markers were combined with CD31, α-smooth muscle-actin, CD68, and 4',6-diamidino-2 phenylindole dihydrochloride (DAPI). Double, triple, and quadruple marker combinations were documented using confocal microscopy. Numerous podoplanin+ cells were mainly located at the anterior border of the iris while LYVE-1+ cells were distributed throughout the nonpigmented part. Both cell populations were PROX1/FOXC2/CCL21/VEGFR3-. Blood vessels, iris smooth muscles, and individual cells were VEGFR3+. While PDPN+ cells were rarely detected posteriorly of the iris root, many LYVE-1+ cells were present within the ciliary body muscle and villi. Within the muscle, occasionally PDPN+ vessel-like structures were detectable, but these were never colocalized with LYVE-1. Similar vessel-like structures were VEGFR3+/PROX1-/CCL21-, but CD31+. Further, ciliary muscle fibers and ciliary epithelium were immunoreactive for VEGFR3/CCL21, but were LYVE-1/PDPN-. A certain topography of structures at the various uvea-positions investigated was not obvious. The majority of LYVE-1+ cells displayed immunoreactivity for CD68. Lymphatic vessels colocalizing for at least two lymphatic markers were not detectable. Therefore, if present, putative lymphatic channels of the anterior uvea might display a different marker panel than generally presumed.

  1. The IRIS Federator: Accessing Seismological Data Across Data Centers

    Science.gov (United States)

    Trabant, C. M.; Van Fossen, M.; Ahern, T. K.; Weekly, R. T.

    2015-12-01

    In 2013 the International Federation of Digital Seismograph Networks (FDSN) approved a specification for web service interfaces for accessing seismological station metadata, time series and event parameters. Since then, a number of seismological data centers have implemented FDSN service interfaces, with more implementations in development. We have developed a new system called the IRIS Federator which leverages this standardization and provides the scientific community with a service for easy discovery and access of seismological data across FDSN data centers. These centers are located throughout the world and this work represents one model of a system for data collection across geographic and political boundaries.The main components of the IRIS Federator are a catalog of time series metadata holdings at each data center and a web service interface for searching the catalog. The service interface is designed to support client­-side federated data access, a model in which the client (software run by the user) queries the catalog and then collects the data from each identified center. By default the results are returned in a format suitable for direct submission to those web services, but could also be formatted in a simple text format for general data discovery purposes. The interface will remove any duplication of time series channels between data centers according to a set of business rules by default, however a user may request results with all duplicate time series entries included. We will demonstrate how client­-side federation is being incorporated into some of the DMC's data access tools. We anticipate further enhancement of the IRIS Federator to improve data discovery in various scenarios and to improve usefulness to communities beyond seismology.Data centers with FDSN web services: http://www.fdsn.org/webservices/The IRIS Federator query interface: http://service.iris.edu/irisws/fedcatalog/1/

  2. First-Year Students' Priorities and Choices in STEM Studies--IRIS Findings from Germany and Austria

    Science.gov (United States)

    Elster, D.

    2014-01-01

    IRIS (Interests and Recruitment in Science; http://iris.fp-7.org/about-iris/) is a European 7th framework project focusing on the challenge that only few young people in general, and women in particular, choose an education and career in science and technology. Project IRIS aims to contribute to the improvement of recruitment, retention and gender…

  3. Iris Segmentation using Gradient Magnitude and Fourier Descriptor for Multimodal Biometric Authentication System

    Directory of Open Access Journals (Sweden)

    Defiana Sulaeman

    2016-12-01

    Full Text Available Perfectly segmenting the area of the iris is one of the most important steps in iris recognition. There are several problematic areas that affect the accuracy of the iris segmentation step, such as eyelids, eyelashes, glasses, pupil (due to less accurate iris segmentation, motion blur, and lighting and specular reflections. To solve these problems, gradient magnitude and Fourier descriptor are employed to do iris segmentation in the proposed Multimodal Biometric Authentication System (MBAS. This approach showed quite promising results, i.e. an accuracy rate of 97%. The result of the iris recognition system was combined with the result of an open-source fingerprint recognition system to develop a multimodal biometrics authentication system. The results of the fusion between iris and fingerprint authentication were 99% accurate. Data from Multimedia Malaysia University (MMUI and our own prepared database, the SGU-MB-1 dataset, were used to test the accuracy of the proposed system.

  4. The Infrared Imaging Spectrograph (IRIS) for TMT: optical design of IRIS imager with "Co-axis double TMA"

    CERN Document Server

    Tsuzuki, Toshihiro; Harakawa, Hiroki; Ikenoue, Bungo; Larkin, James; Moore, Anna; Obuchi, Yoshiyuki; Phillips, Andrew C; Saito, Sakae; Uraguchi, Fumihiro; Wincentsen, James; Wright, Shelley; Hayano, Yutaka

    2016-01-01

    IRIS (InfraRed Imaging Spectrograph) is one of the first-generation instruments for the Thirty Meter Telescope (TMT). IRIS is composed of a combination of near-infrared (0.84--2.4 $\\mu$m) diffraction limited imager and integral field spectrograph. To achieve near-diffraction limited resolutions in the near-infrared wavelength region, IRIS uses the advanced adaptive optics system NFIRAOS (Narrow Field Infrared Adaptive Optics System) and integrated on-instrument wavefront sensors (OIWFS). However, IRIS itself has challenging specifications. First, the overall system wavefront error should be less than 40 nm in Y, z, J, and H-band and 42 nm in K-band over a 34.0 $\\times$ 34.0 arcsecond field of view. Second, the throughput of the imager components should be more than 42 percent. To achieve the extremely low wavefront error and high throughput, all reflective design has been newly proposed. We have adopted a new design policy called "Co-Axis double-TMA", which cancels the asymmetric aberrations generated by "col...

  5. Diagnóstico precoz del cáncer gástrico estrategias de prevención secundaria y dificultades del diagnóstico de lesiones precoces

    Directory of Open Access Journals (Sweden)

    Dr. B. Alfonso Calvo

    2011-07-01

    Full Text Available El cáncer gástrico persiste como un problema importante de salud pública a nivel mundial. En Chile es la primera causa de mortalidad por tumores malignos. En 1962 se definió el concepto de cáncer gástrico precoz, pasando a ser una enfermedad curable si era pesquisado en estas etapas, con sobrevida de 90% o más a 5 años. La estrategia implementada en Japón para detectarlo en etapas precoces fue a través de estudios masivos en población presuntamente asintomática. Esta estrategia ha sido exitosa en los cánceres detectados en etapa precoz pero con alto costo y bajo rendimiento, no aplicable en países en desarrollo con alto riesgo. La endoscopía ha desplazado a la radiología en el estudio de las enfermedades del tubo digestivo. Otra forma de enfrentar el problema en países en desarrollo con alto riesgo, es focalizar la endoscopía en sujetos sintomáticos. Desde 1996 se desarrolla un programa de detección de cáncer gástrico mediante esta última estrategia en la comuna de La Florida, Región Metropolitana. Se presenta un análisis preliminar de 12 años de este programa y se comentan las dificultades para un diagnóstico precoz.

  6. Estenosis malignas del estomago

    OpenAIRE

    Jácome Valderrama, José A.; Gutiérrez Arango, Roberto; Parra Torres, Augusto; Forero Laverde, Humberto; Medina Medina, Julio

    2011-01-01

    Al hablar de estenosis malignas del estomago, no vamos a referirnos a las obstrucciones producidas por lesiones extrínsecas, en las cuales influye como causa determinante el fenómeno mecánico de compresión exterior, sino a aquellas lesiones que primitivamente se originan en los tejidos del estomago, vale decir en sus paredes u orificios. Las estenosis intrínsecas malignas del estomago son producidas generalmente por tumores derivados de sus diferentes tejidos y por consiguiente se agrupan en ...

  7. Effectiveness of see-and-treat for approaching pre-invasive lesions of uterine cervix Efectividad del abordaje "ver y tratar" en lesiones pre-invasivas en el colon uterino Efetividade da abordagem "ver e tratar" em lesões pré-invasivas no colo uterino

    Directory of Open Access Journals (Sweden)

    Aparecida Cristina Sampaio Monteiro

    2009-10-01

    Full Text Available OBJECTIVE: To compare the effectiveness between the see-and-treat (S&T approach and the conventional one (with prior biopsy for squamous intraepithelial lesions of uterine cervix. METHODS: A cross-sectional study was conducted with 900 nonpregnant women with cytology suggestive of high grade squamous intraepithelial lesions in the city of Rio de Janeiro, Southeastern Brazil, between 1998 and 2004. The S&T approach consists of a large loop excision of the transformation zone procedure and is recommended when cytology is suggestive of high grade squamous intraepithelial lesion, satisfactory colposcopy with abnormalities compatible with the suspected cytological results, and the lesion is limited to the ectocervix or extends up to one centimeter of the endocervical canal. A subgroup of 336 patients whose colposcopy was considered satisfactory was analyzed, and they were divided into two groups for comparison: patients treated without prior biopsy (n = 288 and patients treated after a biopsy showing high grade squamous intraepithelial lesions (n = 48. Patients who were not treated or only treated more than a year later after recruitment at the colposcopy unit were considered dropouts. RESULTS: Of patients recruited during the study period, 71 were not treated or were only treated for at least a year. The overall dropout rate was 7.9% (95% CI: 6.1;9.7. Mean time elapsed between patient recruitment and treatment was 17.5 days in the S&T group and 102.5 days in the prior biopsy group. Dropout rates were 1.4% (95% CI: 0.04;2.7 and 5.% (95% CI: 0;12.3, respectively (p=0.07. The proportion of overtreated cases (negative histology in the S&T group was 2.0% (95% CI: 0.4;3.6. CONCLUSIONS: The difference in the mean time elapsed between patient recruitment and treatment indicates that S&T is a time-saving approach The proportion of negative cases from using the S&T approach can be regarded as low.OBJETIVO: Comparar la efectividad del método "ver-y-tratar" (V

  8. T2-weighted MR imaging of liver lesions: a prospective evaluation comparing turbo spin-echo, breath-hold turbo spin-echo and half-Fourier turbo spin-echo (HASTE) sequences; Estudio de lesiones hepaticas con imagenes de resonancia magnetica potenciadas en T2: evaluacion prospectiva comparando secuencias turbo eco del espin, turbo eco del espin con respiracion sostenida y half-Fourier turbo eco del espin (HASTE)

    Energy Technology Data Exchange (ETDEWEB)

    Martin, J.; Villajos, M.; Oses, M. J.; Veintemillas, M.; Rue, M.; Puig, J.; Sentis, M. [Fundacion Parc Tauli. Sabadell (Spain)

    2000-07-01

    To compare turbo spin-echo (TSE), breath-hold TSE and half-Fourier acquisition single-shot turbo spin-echo (HASTE) sequences quantitatively and qualitatively in T2-weighted images of liver lesions. The authors evaluated prospectively 89 liver lesions in 73 patients using a 1.0-T magnetic resonance system to compare TSE, breath-hold TSE and HASTE sequences. The quantitative parameters were: lesion-to-liver contrast and lesion-to-liver contrast-to-noise ratio. The qualitative analysis was performed by two observers in consensus who examined four parameters: respiratory artifacts, lesion edge definition, intrahepatic vessel definition and image quality. Repeated measures analysis of variance was utilized to compare the quantitative variables and Friedman's nonparametric test for the qualitative parameters. In quantitative terms, the lesion-to-liver contrast was similar in TSE and breath-hold TSE sequences (2.45{+-}1.44 versus 2.60{+-}1.66), both of which were significantly better than the HASTE sequence (1.12{+-}0.72; p<0.001). The lesion-to-liver contrast-to-noise ratio was significantly higher in the TSE sequence (62.60{+-}46.40 versus 40.22{+-}25.35 versus 50.90{+-}32.10 for TSE, breath-hold TSE and HASTE sequences, respectively; p<0.001). In the qualitative comparisons, the HASTE sequence was significantly better than the TSE and breath-hold TSE sequences (p<0.001) in terms of artifacts and definition of lesion edge and intrahepatic vessels. Image quality was also significantly greater in the HASTE sequence (p<0.001). In quantitative terms, the TSE sequence is better than the breath-hold TSE and HASTE sequences, but there are no movement artifacts in the HASTE sequence, which is also significantly superior to TSE and breath-hold TSE sequences in qualitative terms and, thus, can be employed for T2-weighted images in liver studies. (Author) 17 refs.

  9. The Infrared Imaging Spectrograph (IRIS) for TMT: optical design of IRIS imager with "co-axis double TMA"

    Science.gov (United States)

    Tsuzuki, Toshihiro; Suzuki, Ryuji; Harakawa, Hiroki; Ikenoue, Bungo; Larkin, James; Moore, Anna; Obuchi, Yoshiyuki; Phillips, Andrew C.; Saito, Sakae; Uraguchi, Fumihiro; Wincentsen, James; Wright, Shelley; Hayano, Yutaka

    2016-08-01

    IRIS (InfraRed Imaging Spectrograph) is one of the first-generation instruments for the Thirty Meter Telescope (TMT). IRIS is composed of a combination of near-infrared (0.84-2.4 μm) diffraction limited imager and integral field spectrograph. To achieve near-diffraction limited resolutions in the near-infrared wavelength region, IRIS uses the advanced adaptive optics system NFIRAOS (Narrow Field Infrared Adaptive Optics System) and integrated on-instrument wavefront sensors (OIWFS). However, IRIS itself has challenging specifications. First, the overall system wavefront error should be less than 40 nm in Y, z, J, and H-band and 42 nm in K-band over a 34.0 × 34.0 arcsecond field of view. Second, the throughput of the imager components should be more than 42 percent. To achieve the extremely low wavefront error and high throughput, all reflective design has been newly proposed. We have adopted a new design policy called "Co-Axis double-TMA", which cancels the asymmetric aberrations generated by "collimator/TMA" and "camera/TMA" efficiently. The latest imager design meets all specifications, and, in particular, the wavefront error is less than 17.3 nm and throughput is more than 50.8 percent. However, to meet the specification of wavefront error and throughput as built performance, the IRIS imager requires both mirrors with low surface irregularity after high-reflection coating in cryogenic and high-level Assembly Integration and Verification (AIV). To deal with these technical challenges, we have done the tolerance analysis and found that total pass rate is almost 99 percent in the case of gauss distribution and more than 90 percent in the case of parabolic distribution using four compensators. We also have made an AIV plan and feasibility check of the optical elements. In this paper, we will present the details of this optical system.

  10. A Novel Edge-Map Creation Approach for Highly Accurate Pupil Localization in Unconstrained Infrared Iris Images

    OpenAIRE

    Vineet Kumar; Abhijit Asati; Anu Gupta

    2016-01-01

    Iris segmentation in the iris recognition systems is a challenging task under noncooperative environments. The iris segmentation is a process of detecting the pupil, iris’s outer boundary, and eyelids in the iris image. In this paper, we propose a pupil localization method for locating the pupils in the non-close-up and frontal-view iris images that are captured under near-infrared (NIR) illuminations and contain the noise, such as specular and lighting reflection spots, eyeglasses, nonunifor...

  11. Lesiones deportivas Sports injuries

    Directory of Open Access Journals (Sweden)

    Isabel Cristina Gallego Ching

    2007-04-01

    Full Text Available El estrés generado por la práctica deportiva ha originado una mayor probabilidad de que los atletas presenten lesiones agudas y crónicas. En el ámbito mundial existen diferentes investigaciones acerca de la incidencia de lesiones deportivas. La comparación de sus resultados es difícil por las diferencias en las características de la población y en la forma de reportar los datos, que varía ampliamente entre los estudios (proporciones o tasas de incidencia o tasas por cada 100 ó 1.000 participantes o tasas por horas de juego o por número de partidos jugados. Las tasas varían entre 1,7 y 53 lesiones por 1.000 horas de práctica deportiva, entre 0,8 y 90,9 por 1.000 horas de entrenamiento, entre 3,1 y 54,8 por 1.000 horas de competición y de 6,1 a 10,9 por 100 juegos. La gran variación entre las tasas de incidencia se explica por las diferencias existentes entre los deportes, los países, el nivel competitivo, las edades y la metodología empleada en los estudios. Se ha definido la lesión deportiva como la que ocurre cuando los atletas están expuestos a la práctica del deporte y se produce alteración o daño de un tejido, afectando el funcionamiento de la estructura. Los deportes de contacto generan mayor riesgo de presentar lesiones; se destacan al respecto los siguientes: fútbol, rugby, baloncesto, balonmano, artes marciales y jockey. Las lesiones ocurren con mayor probabilidad en las competencias que en el entrenamiento. Stress generated by sports practice has increased the probability that athletes suffer from acute and chronic injuries. Worldwide, there have been many different investigations concerning the incidence of sport injuries. The different ways in which results have been presented makes it difficult to compare among them. Rates of sports injuries vary between 1.7 and 53 per 1.000 hours of sports practice; 0.8 and 90.9 per 1.000 hours of training; 3.1 and 54.8 per 1.000 hours of competition, and 6.1 and 10.9 per 100

  12. Real-Time IRI driven by GIRO data

    Science.gov (United States)

    Galkin, Ivan; Huang, Xueqin; Reinisch, Bodo; Bilitza, Dieter; Vesnin, Artem

    Real-time extensions of the empirical International Reference Ionosphere (IRI) model are based on assimilative techniques that preserve the IRI formalism which is optimized for the description of climatological ionospheric features. The Global Ionosphere Radio Observatory (GIRO) team has developed critical parts of an IRI Real Time Assimilative Model (IRTAM) for the global ionospheric plasma distribution using measured data available in real time from ~50 ionosondes of the GIRO network, The current assimilation results present global assimilative maps of foF2 and hmF2 that reproduce available data at the sensor sites and smoothly return to the climatological specifications when and where the data are missing, and are free from artificial sharp gradients and short-lived artifacts when viewed in time progression. Animated real-time maps of foF2 and hmF2 are published with a few minutes latency at http://giro.uml.edu/IRTAM/. Our real-time IRI modeling uses morphing, a technique that transforms the climatological ionospheric specifications to match the observations by iteratively computing corrections to the original coefficients of the diurnal/spatial expansions, used in IRI to map the key ionospheric characteristics, while keeping the IRI expansion basis formalism intact. Computation of the updated coefficient set for a given point in time includes analysis of the latest 24-hour history of observations, which allows the morphing technique to sense evolving ionospheric dynamics even with a sparse sensor network. A Non-linear Error Compensation Technique for Associative Restoration (NECTAR), one of the features in our morphing approach, has been in operation at the Lowell GIRO Data Center since 2013. The cornerstone of NECTAR is a recurrent neural network optimizer that is responsible for smoothing the transitions between the grid cells where observations are available. NECTAR has proved suitable for real-time operations that require the assimilation code to be

  13. Iris color and associated pathological ocular complications:a review of epidemiologic studies

    Directory of Open Access Journals (Sweden)

    Hong-Peng Sun

    2014-10-01

    Full Text Available AIM:To elucidate the associations of iris color with major eye diseases.METHODS:A systematic search on Medline with coverage up to August 2013 was conducted. Assessment of the quality of studies based on their levels of evidence was in accordance with the Centre for Evidence-Based Medicine, Oxford, United Kingdom.RESULTS:A relationship between darker iris color and an increased risk of age-related cataract has been reported from cross-sectional studies and prospective cohort studies. There was no consistent evidence supporting a major role of iris color in the development or progression of age-related macular degeneration. The association of iris color with ocular uveal melanoma has been confirmed by a meta-analysis of observational studies previously. The etiologic synergism between light iris color and environmental exposure such as UV the exposure of UV radiation was found. There were no studies evaluating the refractive associations with iris color but there may be a possible link between iris color and myopia.CONCLUSION:Darker iris color is associated with an increased risk of cataractand a reduced risk ofocular uveal melanoma. The association of iris color with age-related macular degeneration is not confirmed. Ophthalmologists should be aware that the risk of ocular disorders appears to vary by differences in iris color.

  14. A fast and robust iris localization method based on texture segmentation

    Science.gov (United States)

    Cui, Jiali; Wang, Yunhong; Tan, Tieniu; Ma, Li; Sun, Zhenan

    2004-08-01

    With the development of the current networked society, personal identification based on biometrics has received more and more attention. Iris recognition has a satisfying performance due to its high reliability and non-invasion. In an iris recognition system, preprocessing, especially iris localization plays a very important role. The speed and performance of an iris recognition system is crucial and it is limited by the results of iris localization to a great extent. Iris localization includes finding the iris boundaries (inner and outer) and the eyelids (lower and upper). In this paper, we propose an iris localization algorithm based on texture segmentation. First, we use the information of low frequency of wavelet transform of the iris image for pupil segmentation and localize the iris with a differential integral operator. Then the upper eyelid edge is detected after eyelash is segmented. Finally, the lower eyelid is localized using parabolic curve fitting based on gray value segmentation. Extensive experimental results show that the algorithm has satisfying performance and good robustness.

  15. Iris color and associated pathological ocular complications: a review of epidemiologic studies

    Institute of Scientific and Technical Information of China (English)

    Hong-Peng; Sun; Yi; Lin; Chen-Wei; Pan

    2014-01-01

    AIM:To elucidate the associations of iris color with major eye diseases.· METHODS:A systematic search on Medline with coverage up to August 2013 was conducted. Assessment of the quality of studies based on their levels of evidence was in accordance with the Centre for Evidence-Based Medicine, Oxford, United Kingdom.RESULTS:A relationship between darker iris color and an increased risk of age-related cataract has been reported from cross-sectional studies and prospective cohort studies. There was no consistent evidence supporting a major role of iris color in the development or progression of age-related macular degeneration. The association of iris color with ocular uveal melanoma has been confirmed by a meta-analysis of observational studies previously. The etiologic synergism between light iris color and environmental exposure such as UV the exposure of UV radiation was found. There were no studies evaluating the refractive associations with iris color but there may be a possible link between iris color and myopia.CONCLUSION:Darker iris color is associated with an increased risk of cataract and a reduced risk of ocular uveal melanoma. The association of iris color with agerelated macular degeneration is not confirmed.Ophthalmologists should be aware that the risk of ocular disorders appears to vary by differences in iris color.

  16. Improving iris recognition performance using segmentation, quality enhancement, match score fusion, and indexing.

    Science.gov (United States)

    Vatsa, Mayank; Singh, Richa; Noore, Afzel

    2008-08-01

    This paper proposes algorithms for iris segmentation, quality enhancement, match score fusion, and indexing to improve both the accuracy and the speed of iris recognition. A curve evolution approach is proposed to effectively segment a nonideal iris image using the modified Mumford-Shah functional. Different enhancement algorithms are concurrently applied on the segmented iris image to produce multiple enhanced versions of the iris image. A support-vector-machine-based learning algorithm selects locally enhanced regions from each globally enhanced image and combines these good-quality regions to create a single high-quality iris image. Two distinct features are extracted from the high-quality iris image. The global textural feature is extracted using the 1-D log polar Gabor transform, and the local topological feature is extracted using Euler numbers. An intelligent fusion algorithm combines the textural and topological matching scores to further improve the iris recognition performance and reduce the false rejection rate, whereas an indexing algorithm enables fast and accurate iris identification. The verification and identification performance of the proposed algorithms is validated and compared with other algorithms using the CASIA Version 3, ICE 2005, and UBIRIS iris databases.

  17. The Infrared Imaging Spectrograph (IRIS) for TMT: Instrument Overview

    CERN Document Server

    Larkin, James E; Barton, Elizabeth J; Bauman, Brian; Bui, Khanh; Canfield, John; Crampton, David; Delacroix, Alex; Fletcher, Murray; Hale, David; Loop, David; Niehaus, Cyndie; Phillips, Andrew C; Reshetov, Vladimir; Simard, Luc; Smith, Roger; Suzuki, Ryuji; Usuda, Tomonori; Wright, Shelley A

    2010-01-01

    We present an overview of the design of IRIS, an infrared (0.85 - 2.5 micron) integral field spectrograph and imaging camera for the Thirty Meter Telescope (TMT). With extremely low wavefront error (<30 nm) and on-board wavefront sensors, IRIS will take advantage of the high angular resolution of the narrow field infrared adaptive optics system (NFIRAOS) to dissect the sky at the diffraction limit of the 30-meter aperture. With a primary spectral resolution of 4000 and spatial sampling starting at 4 milliarcseconds, the instrument will create an unparalleled ability to explore high redshift galaxies, the Galactic center, star forming regions and virtually any astrophysical object. This paper summarizes the entire design and basic capabilities. Among the design innovations is the combination of lenslet and slicer integral field units, new 4Kx4k detectors, extremely precise atmospheric dispersion correction, infrared wavefront sensors, and a very large vacuum cryogenic system.

  18. The Infrared Imaging Spectrograph (IRIS) for TMT: Instrument Overview

    CERN Document Server

    Moore, Anna M; Wright, Shelley A; Bauman, Brian; Dunn, Jennifer; Ellerbroek, Brent; Phillips, Andrew C; Simard, Luc; Suzuki, Ryuji; Zhang, Kai; Aliado, Ted; Brims, George; Canfield, John; Chen, Shaojie; Dekany, Richard; Delacroix, Alex; Do, Tuan; Herriot, Glen; Ikenoue, Bungo; Johnson, Chris; Meyer, Elliot; Obuchi, Yoshiyuki; Pazder, John; Reshetov, Vladimir; Riddle, Reed; Saito, Sakae; Smith, Roger; Sohn, Ji Man; Uraguchi, Fumihiro; Usuda, Tomonori; Wang, Eric; Wang, Lianqi; Weiss, Jason; Wooff, Robert

    2014-01-01

    We present an overview of the design of IRIS, an infrared (0.84 - 2.4 micron) integral field spectrograph and imaging camera for the Thirty Meter Telescope (TMT). With extremely low wavefront error (<30 nm) and on-board wavefront sensors, IRIS will take advantage of the high angular resolution of the narrow field infrared adaptive optics system (NFIRAOS) to dissect the sky at the diffraction limit of the 30-meter aperture. With a primary spectral resolution of 4000 and spatial sampling starting at 4 milliarcseconds, the instrument will create an unparalleled ability to explore high redshift galaxies, the Galactic center, star forming regions and virtually any astrophysical object. This paper summarizes the entire design and basic capabilities. Among the design innovations is the combination of lenslet and slicer integral field units, new 4Kx4k detectors, extremely precise atmospheric dispersion correction, infrared wavefront sensors, and a very large vacuum cryogenic system.

  19. The Evolution of Transition Region Loops Using IRIS and AIA

    Science.gov (United States)

    Winebarger, Amy R.; DePontieu, Bart

    2014-01-01

    Over the past 50 years, the model for the structure of the solar transition region has evolved from a simple transition layer between the cooler chromosphere to the hotter corona to a complex and diverse region that is dominated by complete loops that never reach coronal temperatures. The IRIS slitjaw images show many complete transition region loops. Several of the "coronal" channels in the SDO AIA instrument include contributions from weak transition region lines. In this work, we combine slitjaw images from IRIS with these channels to determine the evolution of the loops. We develop a simple model for the temperature and density evolution of the loops that can explain the simultaneous observations. Finally, we estimate the percentage of AIA emission that originates in the transition region.

  20. Eye and Iris Detection Using Projection and Radial Symmetry Transform

    Institute of Scientific and Technical Information of China (English)

    XIANG Shu-lan; CAO Cheng; Aishy Amer

    2010-01-01

    This paper presents an eye and iris detection algorithm for human facial images. The authors combine three features of the eye to develop the algorithm: 1) the pixels surrounding the eyes are more variable than other parts of the face; 2) eye pixels are darker than their neighbors; 3) eyes often exhibit radial symmetric properties. Through the first feature, two rough regions of both eyes are detected on the face. Eye masks are then formed based on the second feature, and a fast radial symmetry transform is applied to the two rough regions of both eyes. Finally, accurate iris centers are located by searching the maximum value of the radial symmetry transform results. Using 450 human facial images from the Caltech face database, experiments show that the success rate of the proposed method is 91.7%. The effectiveness of the method was also verified through detection of video frames.

  1. The Infrared Imaging Spectrograph (IRIS) for TMT: Instrument Overview

    CERN Document Server

    Larkin, James E; Wright, Shelley A; Wincentsen, James E; Anderson, David; Chisholm, Eric M; Dekany, Richard G; Dunn, Jennifer S; Ellerbroek, Brent L; Hayano, Yutaka; Phillips, Andrew C; Simard, Luc; Smith, Roger; Suzuki, Ryuji; Weber, Robert W; Weiss, Jason L; Zhang, Kai

    2016-01-01

    IRIS is a near-infrared (0.84 to 2.4 microns) integral field spectrograph and wide-field imager being developed for first light with the Thirty Meter (TMT). It mounts to the advanced optics (AO) system NFIRAOS and has integrated on-instrument wavefront sensors (OIWFS) to achieve diffraction-limited spatial resolution at wavelengths longer than 1 micron. With moderate spectral resolution (R ~4,000 - 8,000) and large bandpass over a continuous field of view, IRIS will open new opportunities in virtually every area of astrophysical science. It will be able to resolve surface features tens of kilometers across Titan, while also mapping the distant galaxies at the scale of an individual star forming region. This paper summarizes the entire design and capabilities, and includes the results from the nearly completed preliminary design phase.

  2. Efecto del pH y de la adición de fosfatos de sodio sobre las propiedades de gelificación y emulsión de surimi de trucha arco-iris (Oncorhynchus mykiss Efeito do pH e da adição de fosfatos de sódio sobre as propriedades de gelificação e emulsão de surimi de truta arco-íris (Oncorhynchus mykiss

    Directory of Open Access Journals (Sweden)

    Juan Díaz-Vela

    2008-09-01

    Full Text Available Para la elaboración de surimi se han empleado distintas técnicas, sin embargo, es indispensable mantener la funcionalidad de las proteínas musculares durante su extracción, ya que son afectadas principalmente por el pH. La incorporación de fosfatos en productos cárnicos afecta el pH, teniendo como consecuencia una mejora en la capacidad de retención de agua de las proteínas musculares, alterando la funcionalidad de estos productos. Se utilizó la metodología de superficie de respuesta para determinar el efecto de cinco niveles de pH y cinco concentraciones de una mezcla de fosfatos de sodio comercial sobre la funcionalidad de surimi de trucha arco-iris, evaluada por su capacidad de emulsión y trabajo de emulsión, fuerza de gel y trabajo de penetración de geles de surimi. Los resultados obtenidos indican que el incremento en la concentración de fosfatos de sodio mejoró la funcionalidad del surimi y a pH alcalino las propiedades de emulsión mejoraron, pero se afectaron negativamente las propiedades de gelificación.Para a elaboração de surimi, diferentes técnicas podem ser usadas, mas é indispensável manter a funcionalidade das proteínas miofibrilares, afetadas principalmente pelo pH, durante o processo. A incorporação de fosfatos a produtos cárneos afeta o pH, tendo como conseqüência, principalmente, a melhoria da capacidade de retenção de água do músculo, alterando a funcionalidade destes produtos. A metodologia de superfície de resposta foi usada para determinar a influência de cinco níveis de pH e cinco concentrações de uma mistura comercial de fosfatos de sódio sobre a funcionalidade de surimi de truta arco-íris, avaliada através de sua capacidade de emulsificação e trabalho de emulsificação, força de gel e trabalho de penetração de géis de surimi. Os resultados obtidos indicam que o aumento na concentração dos fosfatos de sódio melhorou a funcionalidade do surimi e que o pH alcalino favoreceu

  3. Boimsja togo, tshego ne znajem / Iris Pettai ; interv. Nelli Kuznetsova

    Index Scriptorium Estoniae

    Pettai, Iris, 1947-

    2004-01-01

    Presidendi juures asuva vähemusrahvuste ümarlaua ning poliitikute ja ekspertide kohtumisel esinenud sotsioloogi Iris Pettai hinnangul on riigile ohtlik, kui kaks kogukonda elavad paralleelselt, puutuvad vähe kokku. Mida väiksem on sallivus või tolerantsus põhirahva hulgas, seda rohkem tõukab ta ühiskonnast eemale teistest rahvustest inimesi. Sallivuse viiest arengufaasist

  4. Simultaneous observation of a hot explosion by NST and IRIS

    Science.gov (United States)

    Kim, Yeon-Han; Yurchyshyn, Vasyl; Bong, Su-Chan; Cho, Il-Hyun; Cho, Kyung-Suk; Lee, Jaejin; Lim, Eun-Kyung; Park, Young-Deuk; Yang, Heesu; Ahn, Kwangsu; Goode, Philip R.; Jang, Bi-Ho

    2015-09-01

    We present the first simultaneous observations of so-called “hot explosions” in the cool atmosphere of the Sun made by the New Solar Telescope (NST) of Big Bear Solar Observatory and the Interface Region Imaging Spectrograph (IRIS) in space. The data were obtained during the joint IRIS-NST observations on 2014 July 30. The explosion of interest started around 19:20 UT and lasted for about 10 minutes. Our findings are as follows: (1) the IRIS brightening was observed in three channels of slit-jaw images, which cover the temperature range from 4000 to 80,000 K; (2) during the brightening, the Si iv emission profile showed a double-peaked shape with highly blue and redshifted components (-40 and 80 km s-1) (3) wing brightening occurred in Hα and Ca ii 8542 Å bands and related surges were observed in both bands of the NST Fast Imaging Solar Spectrograph (FISS) instrument; (4) the elongated granule, seen in NST TiO data, is clear evidence of the emergence of positive flux to trigger the hot explosion; (5) the brightening in Solar Dynamics Observatory/Atmospheric Imaging Assembly 1600 Å images is quite consistent with the IRIS brightening. These observations suggest that our event is a hot explosion that occurred in the cool atmosphere of the Sun. In addition, our event appeared as an Ellerman bomb (EB) in the wing of Hα, although its intensity is weak and the vertical extent of the brightening seems to be relatively high compared with the typical EBs.

  5. IRIS: a generic three-dimensional radiative transfer code

    Science.gov (United States)

    Ibgui, L.; Hubeny, I.; Lanz, T.; Stehlé, C.

    2013-01-01

    Context. For most astronomical objects, radiation is the only probe of their physical properties. Therefore, it is important to have the most elaborate theoretical tool to interpret observed spectra or images, thus providing invaluable information to build theoretical models of the physical nature, the structure, and the evolution of the studied objects. Aims: We present IRIS, a new generic three-dimensional (3D) spectral radiative transfer code that generates synthetic spectra, or images. It can be used as a diagnostic tool for comparison with astrophysical observations or laboratory astrophysics experiments. Methods: We have developed a 3D short-characteristic solver that works with a 3D nonuniform Cartesian grid. We have implemented a piecewise cubic, locally monotonic, interpolation technique that dramatically reduces the numerical diffusion effect. The code takes into account the velocity gradient effect resulting in gradual Doppler shifts of photon frequencies and subsequent alterations of spectral line profiles. It can also handle periodic boundary conditions. This first version of the code assumes local thermodynamic equilibrium (LTE) and no scattering. The opacities and source functions are specified by the user. In the near future, the capabilities of IRIS will be extended to allow for non-LTE and scattering modeling. Results: IRIS has been validated through a number of tests. We provide the results for the most relevant ones, in particular a searchlight beam test, a comparison with a 1D plane-parallel model, and a test of the velocity gradient effect. Conclusions: IRIS is a generic code to address a wide variety of astrophysical issues applied to different objects or structures, such as accretion shocks, jets in young stellar objects, stellar atmospheres, exoplanet atmospheres, accretion disks, rotating stellar winds, cosmological structures. It can also be applied to model laboratory astrophysics experiments, such as radiative shocks produced with high

  6. Implementation of Reliable Open Source IRIS Recognition System

    Directory of Open Access Journals (Sweden)

    Dhananjay Ikhar

    2013-12-01

    Full Text Available RELIABLE automatic recognition of persons has long been an attractive goal. As in all pattern recognition problems, the key issue is the relation between inter-class and intra-class variability: objects can be reliably classified only if the variability among different instances of a given class is less than the variability between different classes.The objective of this paper is to implement an open-source iris recognition system in order to verify the claimed performance of the technology. The development tool used will be MATLAB, and emphasis will be only on the software for performing recognition and not hardware for capturing an eye image. A reliable application development approach will be employed in order to produce results quickly. MATLAB provides an excellent environment, with its image processing toolbox. To test the system, a database of 756 grayscale eye images courtesy of Chinese Academy of Sciences-Institute of Automation (CASIA is used. The system is to be composed of a number of sub-systems, which correspond to each stage of iris recognition. These stages are- image acquisition, segmentation, normalization and feature encoding. The input to the system will be an eye image, and the output will be an iris template, which will provide a mathematical representation of the iris region. Which conclude the objectives to design recognition system are- study of different biometrics and their features? Study of different recognition systems and their steps, selection of simple and efficient recognition algorithm for implementation, selection of fast and efficient tool for processing, apply the implemented algorithm to different database and find out performance factors.

  7. Assimilation of GIRO Data into a Real-Time IRI

    Science.gov (United States)

    Galkin, I. A.; Reinisch, B. W.; Huang, X.; Bilitza, D.

    2012-01-01

    Increasingly accurate and detailed global 3-D specification of the Earth's space plasma environment is required to further understand its intricate organization and behavior. For a long time space physics and aeronomy research has been data starved due to the great variety of natural time scales involved in the plasma phenomenology. We have started developing a new approach to the global ionospheric specification called Real-Time Assimilative Mapping (RTAM). The IRI-RTAM will use data from the Global Ionospheric Radio Observatory (GIRO) to smoothly transform International Reference Ionosphere's (IRI's) background empirical maps of the ionospheric characteristics to match the observations. Such empirical assimilative modeling will provide a high-resolution, global picture of the ionospheric response to various short-term events observed during periods of storm activity or the impact of gravity waves coupling the ionosphere to the lower atmosphere, including timelines of the vertical restructuring of the plasma distribution. It will also contribute to the challenging task of providing a rapid insight into the temporal and spatial space weather development using the real-time GIRO data streams. The new assimilation technique "updates" the IRI electron density distribution while preserving the overall integrity of IRI s typical ionospheric feature representations. The technique adjusts the coefficients of the spherical/diurnal expansions used by the CCIR and URSI-88 model to obtain the global sub-peak electron density distribution. The set of global corrected coefficients can be generated as frequently as every 15 min and easily disseminated using a single real-time RTAM server operated by GIRO.

  8. The Infrared Imaging Spectrograph (IRIS) for TMT: data reduction system

    Science.gov (United States)

    Walth, Gregory; Wright, Shelley A.; Weiss, Jason; Larkin, James E.; Moore, Anna M.; Chapin, Edward L.; Do, Tuan; Dunn, Jennifer; Ellerbroek, Brent; Gillies, Kim; Hayano, Yutaka; Johnson, Chris; Marshall, Daniel; Riddle, Reed L.; Simard, Luc; Sohn, Ji Man; Suzuki, Ryuji; Wincentsen, James

    2016-08-01

    IRIS (InfraRed Imaging Spectrograph) is the diffraction-limited first light instrument for the Thirty Meter Telescope (TMT) that consists of a near-infrared (0.84 to 2.4 μm) imager and integral field spectrograph (IFS). The IFS makes use of a lenslet array and slicer for spatial sampling, which will be able to operate in 100's of different modes, including a combination of four plate scales from 4 milliarcseconds (mas) to 50 mas with a large range of filters and gratings. The imager will have a field of view of 34×34 arcsec2 with a plate scale of 4 mas with many selectable filters. We present the preliminary design of the data reduction system (DRS) for IRIS that need to address all of these observing modes. Reduction of IRIS data will have unique challenges since it will provide real-time reduction and analysis of the imaging and spectroscopic data during observational sequences, as well as advanced post-processing algorithms. The DRS will support three basic modes of operation of IRIS; reducing data from the imager, the lenslet IFS, and slicer IFS. The DRS will be written in Python, making use of open-source astronomical packages available. In addition to real-time data reduction, the DRS will utilize real-time visualization tools, providing astronomers with up-to-date evaluation of the target acquisition and data quality. The quick look suite will include visualization tools for 1D, 2D, and 3D raw and reduced images. We discuss the overall requirements of the DRS and visualization tools, as well as necessary calibration data to achieve optimal data quality in order to exploit science cases across all cosmic distance scales.

  9. Two new isoflavanoids from the rhizomes of Iris soforana.

    Science.gov (United States)

    Atta-ur-Rahman; Nasim, Shama; Baig, Irfan; Sener, Bilge; Orhan, Ilkay; Ayanoglu, Filiz; Choudhary, M Iqbal

    2004-10-01

    Two new isoflavones 1 and 2 along with eleven known compounds 3-13, have been isolated for the first time from the rhizomes of Iris soforana. The structures of these compounds were determined on the basis of spectroscopic methods and found to be 5,3'-dihydroxy-4'-methoxy-6,7-methylenedioxyisoflavone (1) (Soforanarin A), and 5,7,5'-trimethoxy-6,3',4'-trihydroxyisoflavone (2) (Soforanarin B).

  10. Lesiones periapicales agudas en pacientes adultos

    Directory of Open Access Journals (Sweden)

    María Elena Fernández Collazo

    2012-06-01

    Full Text Available Se realizó un estudio analítico de corte transversal en el área de salud del Policlínico "27 de Noviembre" del municipio Marianao, La Habana, en el periodo correspondiente de enero a diciembre de 2009. Se incluyeron todos los pacientes que acudieron al servicio de urgencia y que presentaron lesiones periapicales agudas. Se recogió información de las variables edad, sexo, grupo dentario, causa de la enfermedad, características clínicas e higiene bucal. Esta última se clasificó en las categorías eficiente y deficiente según el índice simplificado de higiene bucal. Se utilizó el X² para estimar la relación entre las variables, y la comparación de proporciones para contrastar la hipótesis de que existieran diferencias entre las lesiones periapicales para las categorías de las variables grupo dentario, causa de la enfermedad y características clínicas. Se encontró un predominio del absceso periapical agudo en un 84,7 % del grupo de edad de 35 a 59 años y del sexo masculino, aunque no se encontraron diferencias significativas para estas variables, ni en los grupos dentarios con respecto a la enfermedad. La higiene bucal resultó estar relacionada con las lesiones periapicales. Se encontraron diferencias significativas en las lesiones periapicales respecto a todas las causas estudiadas, con excepción de las enfermedades periodontales. Respecto a las características clínicas hubo significación en cuanto al aumento de volumen del fondo del surco vestibular y la movilidad dentaria.

  11. The infrared imaging spectrograph (IRIS) for TMT: spectrograph design

    CERN Document Server

    Moore, Anna M; Barton, Elizabeth J; Crampton, David; Delacroix, Alex; Larkin, James E; Simard, Luc; Suzuki, Ryuji; Wright, Shelley A

    2010-01-01

    The Infra-Red Imaging Spectrograph (IRIS) is one of the three first light instruments for the Thirty Meter Telescope (TMT) and is the only one to directly sample the diffraction limit. The instrument consists of a parallel imager and off-axis Integral Field Spectrograph (IFS) for optimum use of the near infrared (0.84um-2.4um) Adaptive Optics corrected focal surface. We present an overview of the IRIS spectrograph that is designed to probe a range of scientific targets from the dynamics and morphology of high-z galaxies to studying the atmospheres and surfaces of solar system objects, the latter requiring a narrow field and high Strehl performance. The IRIS spectrograph is a hybrid system consisting of two state of the art IFS technologies providing four plate scales (4mas, 9mas, 25mas, 50mas spaxel sizes). We present the design of the unique hybrid system that combines the power of a lenslet spectrograph and image slicer spectrograph in a configuration where major hardware is shared. The result is a powerful...

  12. Prominence and tornado dynamics observed with IRIS and THEMIS

    Science.gov (United States)

    Schmieder, Brigitte; Levens, Peter; Labrosse, Nicolas; Mein, Pierre; Lopez Ariste, Arturo; Zapior, Maciek

    2017-08-01

    Several prominences were observed during campaigns in September 2013 and July 2014 with the IRIS spectrometer and the vector magnetograph THEMIS (Tenerife). SDO/AIA and IRIS provided images and spectra of prominences and tornadoes corresponding to different physical conditions of the transition region between the cool plasma and the corona. The vector magnetic field was derived from THEMIS observations by using the He D3 depolarisation due to the magnetic field. The inversion code (PCA) takes into account the Hanle and Zeeman effects and allows us to compute the strength and the inclination of the magnetic field which is shown to be mostly horizontal in prominences as well as in tornadoes. Movies from SDO/AIA in 304 A and Hinode/SOT in Ca II show the highly dynamic nature of the fine structures. From spectra in Mg II and Si IV lines provided by IRIS and H-alpha observed by the Multi-channel Subtractive Double Pass (MSDP) spectrograph in the Meudon Solar Tower we derived the Doppler shifts of the fine structures and reconstructed the 3D structure of tornadoes. We conclude that the apparent rotation of AIA tornadoes is due to large-scale quasi-periodic oscillations of the plasma along more or less horizontal magnetic structures.

  13. LDPC and SHA based iris recognition for image authentication

    Directory of Open Access Journals (Sweden)

    K. Seetharaman

    2012-11-01

    Full Text Available We introduce a novel way to authenticate an image using Low Density Parity Check (LDPC and Secure Hash Algorithm (SHA based iris recognition method with reversible watermarking scheme, which is based on Integer Wavelet Transform (IWT and threshold embedding technique. The parity checks and parity matrix of LDPC encoding and cancellable biometrics i.e., hash string of unique iris code from SHA-512 are embedded into an image for authentication purpose using reversible watermarking scheme based on IWT and threshold embedding technique. Simply by reversing the embedding process, the original image, parity checks, parity matrix and SHA-512 hash are extracted back from watermarked-image. For authentication, the new hash string produced by employing SHA-512 on error corrected iris code from live person is compared with hash string extracted from watermarked-image. The LDPC code reduces the hamming distance for genuine comparisons by a larger amount than for the impostor comparisons. This results in better separation between genuine and impostor users which improves the authentication performance. Security of this scheme is very high due to the security complexity of SHA-512, which is 2256 under birthday attack. Experimental results show that this approach can assure more accurate authentication with a low false rejection or false acceptance rate and outperforms the prior arts in terms of PSNR.

  14. Optimal Features Subset Selection and Classification for Iris Recognition

    Directory of Open Access Journals (Sweden)

    Roy Kaushik

    2008-01-01

    Full Text Available Abstract The selection of the optimal features subset and the classification have become an important issue in the field of iris recognition. We propose a feature selection scheme based on the multiobjectives genetic algorithm (MOGA to improve the recognition accuracy and asymmetrical support vector machine for the classification of iris patterns. We also suggest a segmentation scheme based on the collarette area localization. The deterministic feature sequence is extracted from the iris images using the 1D log-Gabor wavelet technique, and the extracted feature sequence is used to train the support vector machine (SVM. The MOGA is applied to optimize the features sequence and to increase the overall performance based on the matching accuracy of the SVM. The parameters of SVM are optimized to improve the overall generalization performance, and the traditional SVM is modified to an asymmetrical SVM to treat the false accept and false reject cases differently and to handle the unbalanced data of a specific class with respect to the other classes. Our experimental results indicate that the performance of SVM as a classifier is better than the performance of the classifiers based on the feedforward neural network, the k-nearest neighbor, and the Hamming and the Mahalanobis distances. The proposed technique is computationally effective with recognition rates of 99.81% and 96.43% on CASIA and ICE datasets, respectively.

  15. Optimal Features Subset Selection and Classification for Iris Recognition

    Directory of Open Access Journals (Sweden)

    Prabir Bhattacharya

    2008-06-01

    Full Text Available The selection of the optimal features subset and the classification have become an important issue in the field of iris recognition. We propose a feature selection scheme based on the multiobjectives genetic algorithm (MOGA to improve the recognition accuracy and asymmetrical support vector machine for the classification of iris patterns. We also suggest a segmentation scheme based on the collarette area localization. The deterministic feature sequence is extracted from the iris images using the 1D log-Gabor wavelet technique, and the extracted feature sequence is used to train the support vector machine (SVM. The MOGA is applied to optimize the features sequence and to increase the overall performance based on the matching accuracy of the SVM. The parameters of SVM are optimized to improve the overall generalization performance, and the traditional SVM is modified to an asymmetrical SVM to treat the false accept and false reject cases differently and to handle the unbalanced data of a specific class with respect to the other classes. Our experimental results indicate that the performance of SVM as a classifier is better than the performance of the classifiers based on the feedforward neural network, the k-nearest neighbor, and the Hamming and the Mahalanobis distances. The proposed technique is computationally effective with recognition rates of 99.81% and 96.43% on CASIA and ICE datasets, respectively.

  16. A bayesian approach to deformed pattern matching of iris images.

    Science.gov (United States)

    Thornton, Jason; Savvides, Marios; Vijaya Kumar, B V K

    2007-04-01

    We describe a general probabilistic framework for matching patterns that experience in-plane nonlinear deformations, such as iris patterns. Given a pair of images, we derive a maximum a posteriori probability (MAP) estimate of the parameters of the relative deformation between them. Our estimation process accomplishes two things simultaneously: It normalizes for pattern warping and it returns a distortion-tolerant similarity metric which can be used for matching two nonlinearly deformed image patterns. The prior probability of the deformation parameters is specific to the pattern-type and, therefore, should result in more accurate matching than an arbitrary general distribution. We show that the proposed method is very well suited for handling iris biometrics, applying it to two databases of iris images which contain real instances of warped patterns. We demonstrate a significant improvement in matching accuracy using the proposed deformed Bayesian matching methodology. We also show that the additional computation required to estimate the deformation is relatively inexpensive, making it suitable for real-time applications.

  17. [Iris heterochromia: variations in form, age changes, sex dimorphism].

    Science.gov (United States)

    Stelzer, O

    1979-06-01

    On a sample of n = 25,346 individuals from Vienna (10,855 males, 14,491 females) the iris pigmentation has been typed by the author. In this sample 65 cases of different types of heterochromia were found. The frequency of the occurrence of the different types of this anomaly could be calculated for the first time. Neglecting age, sex, and type of heterochromia the total frequency amounts to 0.256 (males: 0.157; females: 0.37) %. The variants of heterochromia very from cases of total heterochromia to those of various size; in addition to it a number of special types could be observed. The localization of the heterochrome parts of the iris shows certain variations; mostly, however, it is seen in the lower half of the iris. The nasal part is concerned in only one case; the temporal region never. Thus, the partial heterochromia is characteristic by a marked dependency of its localization. The colour of heterochromia varies from 2 a-14 according to the Martin-Schultz standard set of coloured eyes. However, No. 9 (ca. 50%) and No. 7 (ca. 20%) were the most frequent colours. The age variations are considerable. 5/6 of all heterochromias were found between the age from 2-19 years. Finally, a marked sexual dimorphism was observed, as in females heterochromia is much more frequent than in males.

  18. Design of bipod flexure mounts for the IRIS spectrometer

    Science.gov (United States)

    Weingrod, Isaac; Chou, Catherine Y.; Holmes, Buck; Hom, Craig; Irwin, James Wes; Lindstrom, Obert; Lopez, Frank; Stubbs, David M.; Wüelser, Jean-Pierre

    2013-09-01

    The Interface Region Imaging Spectrograph (IRIS) is a NASA SMall Explorer (SMEX) mission launched onboard a Pegasus™ booster on June 27, 2013. The spacecraft and instrument were designed and built at the Lockheed Martin Space Systems Company. The primary mission goal is to learn how the solar atmosphere is energized. IRIS will obtain high-resolution UV spectra and images in space (0.4 arcsec) and time (1s), focusing on the chromosphere and transition region of our sun, which is a complex interface region between the photosphere and corona. The IRIS instrument uses a Cassegrain telescope to feed a dual spectrograph and slit-jaw imager, which operate in the 133-141 nm and 278-283 nm wavelengths, respectively. Within the spectrograph there are sixteen optics, each requiring subtle mounting features to meet exacting surface figure and stability requirements. This paper covers the opto-mechanical design for the most challenging optic mounts, which include the Collimator, UV Fold Mirrors, and UV Gratings. Although all mounts are unique in size and shape, the fundamental design remains the same. The mounts are highly kinematic, thermally matched, and independent of friction. Their development will be described in detail, starting with the driving requirements and an explanation of the underlying design philosophy.

  19. Outcomes of Sutureless Iris-Claw Lens Implantation

    Science.gov (United States)

    Nowomiejska, Katarzyna; Moneta-Wielgoś, Joanna; Jünemann, Anselm G. M.

    2016-01-01

    Purpose. To evaluate the indications, refraction, and visual and safety outcomes of iris-claw intraocular lens implanted retropupillary with sutureless technique during primary or secondary operation. Methods. Retrospective study of case series. The Haigis formula was used to calculate intraocular lens power. In all cases the wound was closed without suturing. Results. The study comprised 47 eyes. The mean follow-up time was 15.9 months (SD 12.2). The mean preoperative CDVA was 0.25 (SD 0.21). The final mean CDVA was 0.46 (SD 0.27). No hypotony or need for wound suturing was observed postoperatively. Mean postoperative refractive error was −0.27 Dsph (−3.87 Dsph to +2.85 Dsph; median 0.0, SD 1.28). The mean postoperative astigmatism was −1.82 Dcyl (min −0.25, max −5.5; median −1.25, SD 1.07). Postoperative complications were observed in 10 eyes. The most common complication was ovalization of the iris, which was observed in 8 eyes. The mean operation time was 35.9 min (min 11 min, max 79 min; median 34, SD 15.4). Conclusion. Retropupilary iris-claw intraocular lens (IOL) implantation with sutureless wound closing is an easy and fast method, ensuring good refractive outcome and a low risk of complication. The Haigis formula proved to be predictable in postoperative refraction. PMID:27642519

  20. Iris Recognition System Based on Feature Level Fusion

    Directory of Open Access Journals (Sweden)

    Dr. S. R. Ganorkar

    2013-11-01

    Full Text Available Multibiometric systems utilize the evidence presented by multiple biometric sources (e.g., face and fingerprint, multiple fingers of a single user, multiple matchers, etc. in order to determine or verify the identity of an individual. Information from multiple sources can be consolidated in several distinct levels. But fusion of two different biometric traits are difficult due to (i the feature sets of multiple modalities may be incompatible (e.g., minutiae set of fingerprints and eigen-coefficients of face; (ii the relationship between the feature spaces of different biometric systems may not be known; (iii concatenating two feature vectors may result in a feature vector with very large dimensionality leading to the `curse of dimensionality problem, huge storage space and different processing algorithm. Also if we are use multiple images of single biometric trait, then it doesn’t show much variations. So in this paper, we present a efficient technique of feature-based fusion in a multimodal system where left eye and right eye are used as input. Iris recognition basically contains iris location, feature extraction, and identification. This algorithm uses canny edge detection to identify inner and outer boundary of iris. Then this image is feed to Gabor wavelet transform to extract the feature and finally matching is done by using indexing algorithm. The results from the analysis of works indicate that the proposed technique can lead to substantial improvement in performance.

  1. A New IRIS Normalization Process For Recognition System With Cryptographic Techniques

    CERN Document Server

    Nithyanandam, S; Priyadarshini, P L K

    2011-01-01

    Biometric technologies are the foundation of personal identification systems. It provides an identification based on a unique feature possessed by the individual. This paper provides a walkthrough for image acquisition, segmentation, normalization, feature extraction and matching based on the Human Iris imaging. A Canny Edge Detection scheme and a Circular Hough Transform, is used to detect the iris boundaries in the eye's digital image. The extracted IRIS region was normalized by using Image Registration technique. A phase correlation base method is used for this iris image registration purpose. The features of the iris region is encoded by convolving the normalized iris region with 2D Gabor filter. Hamming distance measurement is used to compare the quantized vectors and authenticate the users. To improve the security, Reed-Solomon technique is employed directly to encrypt and decrypt the data. Experimental results show that our system is quite effective and provides encouraging performance. Keywords: Biome...

  2. A data hiding approach for the self-security of iris recognition

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Attacks to biometric data are the primary danger to the self-security of biometrics.To improve the iris feature template data security,a data hiding approach based on bit streams is proposed,in which an iris feature template is embedded into a face image. The proposed approach is applicable to present dominant techniques of iris recognition.With the low computation cost and the zero decoding-error-rate,this data hiding approach,embedding target biometric data into other biometric data for improving the security of target data in identity recognition,data storage and transmission,can deceive attackers more effectively.Furthermore,it does not degrade the iris recognition performances.Experimental results prove that the proposed approach can be used to protect iris feature templates and enhance the security of the iris recognition system itself.

  3. A New IRIS Normalization Process For Recognition System With Cryptographic Techniques

    Directory of Open Access Journals (Sweden)

    S Nithyanandam

    2011-07-01

    Full Text Available Biometric technologies are the foundation of personal identification systems. It provides an identification based on a unique feature possessed by the individual. This paper provides a walkthrough for image acquisition, segmentation, normalization, feature extraction and matching based on the Human Iris imaging. A Canny Edge Detection scheme and a Circular Hough Transform, is used to detect the iris boundaries in the eye's digital image. The extracted IRIS region was normalized by using Image Registration technique. A phase correlation base method is used for this iris image registration purpose. The features of the iris region is encoded by convolving the normalized iris region with 2D Gabor filter. Hamming distance measurement is used to compare the quantized vectors and authenticate the users. To improve the security, Reed-Solomon technique is employed directly to encrypt and decrypt the data. Experimental results show that our system is quite effective and provides encouraging performance.

  4. Observations of solar flares with IRIS and SDO

    Science.gov (United States)

    Li, D.; Innes, D. E.; Ning, Z. J.

    2016-03-01

    Flare kernels brighten simultaneously in all Solar Dynamics Observatory (SDO) Atmospheric Imaging Assembly (AIA) channels making it difficult to determine their temperature structure. The Interface Region Imaging Spectrograph (IRIS) is able to spectrally resolve Fe xxi emission from cold chromospheric brightenings, so it can be used to infer the amount of Fe xxi emission in the 131 Å AIA channel. We use observations of two small solar flares seen by IRIS and SDO to compare the emission measures (EMs) deduced from the IRIS Fe xxi line and the AIA 131 Å channel to determine the fraction of Fe xxi emission in flare kernels in the 131 Å channel of AIA. Cotemporal and cospatial pseudo-raster AIA images are compared with the IRIS results. We use multi-Gaussian line fitting to separate the blending chromospheric emission so as to derive Fe xxi intensities and Doppler shifts in IRIS spectra. We define loop and kernel regions based on the brightness of the 131 Å and 1600 Å intensities. In the loop regions the Fe xxi EMs are typically 80% of the 131 Å values, and range from 67% to 92%. Much of the scatter is due to small misalignments, but the largest site with low Fe xxi contributions was probably affected by a recent injection of cool plasma into the loop. In flare kernels the contribution of Fe xxi increases from less than 10% at the low-intensity 131 Å sites to 40-80% in the brighter kernels. Here the Fe xxi is superimposed on bright chromospheric emission and the Fe xxi line shows blueshifts, sometimes extending up to the edge of the spectral window, 200 km s-1. The AIA 131 Å emission in flare loops is due to Fe xxi emission with a 10-20% contribution from continuum, Fe xxiii, and cooler background plasma emission. In bright flare kernels up to 52% of the 131 Å is from cooler plasma. The wide range seen in the kernels is caused by significant structure in the kernels, which is seen as sharp gradients in Fe xxi EM at sites of molecular and transition region

  5. Biometric iris image acquisition system with wavefront coding technology

    Science.gov (United States)

    Hsieh, Sheng-Hsun; Yang, Hsi-Wen; Huang, Shao-Hung; Li, Yung-Hui; Tien, Chung-Hao

    2013-09-01

    Biometric signatures for identity recognition have been practiced for centuries. Basically, the personal attributes used for a biometric identification system can be classified into two areas: one is based on physiological attributes, such as DNA, facial features, retinal vasculature, fingerprint, hand geometry, iris texture and so on; the other scenario is dependent on the individual behavioral attributes, such as signature, keystroke, voice and gait style. Among these features, iris recognition is one of the most attractive approaches due to its nature of randomness, texture stability over a life time, high entropy density and non-invasive acquisition. While the performance of iris recognition on high quality image is well investigated, not too many studies addressed that how iris recognition performs subject to non-ideal image data, especially when the data is acquired in challenging conditions, such as long working distance, dynamical movement of subjects, uncontrolled illumination conditions and so on. There are three main contributions in this paper. Firstly, the optical system parameters, such as magnification and field of view, was optimally designed through the first-order optics. Secondly, the irradiance constraints was derived by optical conservation theorem. Through the relationship between the subject and the detector, we could estimate the limitation of working distance when the camera lens and CCD sensor were known. The working distance is set to 3m in our system with pupil diameter 86mm and CCD irradiance 0.3mW/cm2. Finally, We employed a hybrid scheme combining eye tracking with pan and tilt system, wavefront coding technology, filter optimization and post signal recognition to implement a robust iris recognition system in dynamic operation. The blurred image was restored to ensure recognition accuracy over 3m working distance with 400mm focal length and aperture F/6.3 optics. The simulation result as well as experiment validates the proposed code

  6. Comparison of ionospheric characteristic parameters obtained by GPS and ionosonde with IRI model over China

    Indian Academy of Sciences (India)

    Cheng Wang

    2016-06-01

    This paper presents a comparison of ionospheric characteristic parameters obtained by a GPS networkand three ionosondes at Mohe (122.4^◦E, 53.5^◦N, dip angle 70.983^◦N), Zuolingzhen (114.6^◦E, 30.5^◦N, dipangle 46.350^◦N), and Fuke (109.1^◦E, 19.5^◦N, dip angle 27.083^◦N) located in China with an IRI model inthe year 2011. Observed NmF2 and hmF2 values at the three stations are compared with IRI2007 andIRI2012 predictions, respectively. The results show that there are clear linear correlations between theobserved values and the IRI model predicted values. The IRI model gives overestimations at the threestations mostly in 2011. For the NmF2 and hmF2 values, most of the results show that the IRI2012predicted values are closer to the observed values compared with those of IRI2007. Additionally, theGPS TEC values derived from the Crustal Movement Observation Network of China (CMONOC) arecompared with the IRI2012 predictions. From the results, it is evident that the IRI2012 model predictionsfollow the normal trend of diurnal variation of GPS measured TEC monthly means but do not reproducethe measured data well. The IRI2012 model overestimates electron density in the latter part of spring aswell as the first half of autumn and winter and underestimates electron density in early spring and thelatter part of autumn. Referring to GPS TEC, the precision of the IRI2012 model predicted TEC valuesis ∼5 TECU over China. It may also be noted that there are two discontinuities of IRI-TEC monthlymeans appearing in November and December of the year 2011. This brings a bias of ∼3 TECU of TECvalues between two adjacent months.

  7. Perancangan Program Aplikasi Deteksi Iris Mata untuk Absensi Karyawan Menggunakan Metode Gabor Wavelet

    Directory of Open Access Journals (Sweden)

    Zahedi Zahedi

    2011-06-01

    Full Text Available To take the employees’ absences in a company, a variety of invented tools or technologies are and already used, for example, attendance cards, fingerprints attendance tool, and attendance tool that uses facial recognition. Attendance tool with a facial recognition uses iris recognition of those employees. Iris code has many properties that hard to forge. Thus, the detection and iris recognition is one of the most secure and accurate for identification. 

  8. Susceptibility of human iris stromal cells to herpes simplex virus 1 entry.

    Science.gov (United States)

    Baldwin, John; Park, Paul J; Zanotti, Brian; Maus, Erika; Volin, Michael V; Shukla, Deepak; Tiwari, Vaibhav

    2013-04-01

    Ocular herpes simplex virus 1 (HSV-1) infection can lead to multiple complications, including iritis, an inflammation of the iris. Here, we use human iris stroma cells as a novel in vitro model to demonstrate HSV-1 entry and the inflammatory mediators that can damage the iris. The upregulated cytokines observed in this study provide a new understanding of the intrinsic immune mechanisms that can contribute to the onset of iritis.

  9. CHARACTERIZING HABITUATION USING THE TIME-ON-TASK METRIC IN AN IRIS RECOGNITION SYSTEM

    OpenAIRE

    Hasselgren, Jacob A.

    2014-01-01

    This thesis presents a characterization of biometric habituation in an iris recognition study using qualitative analysis of a distributed habituation survey and quantitative analysis of iris images collected in 2010 and 2012. The performed analyses answered the following two questions: a) How consistently does the biometric community define habituation?; and b) Does the time-on-task variable provide enough evidence to indicate the existence of habituation in an iris recognition system? The qu...

  10. Lantionpohjan toimintahäiriöt : Fysioterapeuttiset hoitokäytännöt

    OpenAIRE

    Halinen, Erika; Pulkkinen, Sari

    2011-01-01

    Lantionpohjan toimintahäiriöt ovat merkittävä naisten elämänlaatua heikentävä vaiva. Lantionpohjan toimintahäiriöitä ovat virtsaamiseen, ulostamiseen ja seksuaalitoimintoihin liittyvät häiriöt sekä laskeumat ja lantionpohjan alueen kiputilat. Suurimmat riskitekijät toimintahäiriöiden synnylle ovat raskauksien, synnytysten ja ikääntymisen mukanaan tuomat lantionpohjan lihas-, sidekudos- ja hermovauriot tai -muutokset. Lantionpohjan eri rakenteet ja toiminnat ovat läheisessä yhteydessä toisiins...

  11. Iridectomy of the anterior iris stroma using the vitreocutter during phacoemulsification in patients with iridoschisis.

    Science.gov (United States)

    Ghanem, Vinícius Coral; Ghanem, Emir Amin; Ghanem, Ramon Coral

    2003-11-01

    We present a technique to manage iridoschisis. This technique for anterior iridectomy of the affected iris fibers avoids intraoperative obstruction of the phaco tip and prevents postoperative complications such as corneal decompensation and glaucoma. Before the capsulorhexis is created, a vitreocutter is inserted in the anterior chamber and used to cut the iris strands at the site of the iridoschisis, making an anterior sectorial stromal iridectomy and preserving the iris pigment epithelium. Phacoemulsification is then performed. After the pupil is constricted with carbacol, remnants of the loose anterior iris fibers are excised with the vitreocutter and the scleral incision is sutured.

  12. Fractura triple del complejo suspensorio del hombro

    Directory of Open Access Journals (Sweden)

    Eraclio Delgado Rifá

    2015-06-01

    Full Text Available El complejo suspensorio del hombro es una estructura sumamente importante, compuesta por un anillo de huesos y tejidos blandos. Las lesiones aisladas de este complejo anatómico son frecuentes y no afectan su estabilidad. La interrupción doble conduce a la inestabilidad de esta estructura y usualmente requiere tratamiento quirúrgico. La triple interrupción, por su parte, es sumamente rara y es encontrada en casos de trauma de alta energía a menudo en asociación con otras lesiones. Se presenta una triple lesión del complejo suspensorio del hombro en un paciente de 46 años de edad, con una fractura de la glenoides, del acromion tipo III de Kuhn y de la coracoides tipo II de Ogawa. En este caso, la fractura del acromion fue tratada con fijación percutánea con alambres de Kirschner, por tener asociado lesiones de partes blandas que contraindicaron la reducción abierta. La fractura de la glenoides y de la apófisis coracoides fueron tratadas conservadoramente. Después de 6 meses de evolución, el paciente tuvo un resultado funcional aceptable, con una abducción de 90 grados, los 30 grados de rotación externa y 70 de rotación interna, además asintomático y consolidación de todas las fracturas. A pesar de ser catalogada de una lesión grave del cinturón escapular y estar asociada a otras lesiones se obtuvo un resultado satisfactorio al final del tratamiento.

  13. Trascendiendo al yo ensimismado. La ética de la atención de Iris Murdoch

    Directory of Open Access Journals (Sweden)

    Cuartango, Román

    2006-12-01

    Full Text Available Many of moral dilemmas would lose its intensity, thinks Iris Murdoch, if we left the confused idea of a sovereign will that chooses independently its courses of action. Paying attention to what constitutes the reality enables a sort of asceticism of the experience, that leads beyond the deliriums of an I absorbed. The exercise of estimating the details, the connections, the complexity, modifies the decision itself: it does not be a matter of electing, but of “seeing” the moral thing -the demand of the thing-, the same as an exact artist does not paint what “he likes” but “what it is there”.

    Muchos de los dilemas morales perderían su intensidad, piensa Iris Murdoch, si abandonáramos la idea de una voluntad soberana que elige autónomamente sus cursos de acción. Prestar atención a la constitución de la realidad posibilita una suerte de ascesis experiencial que conduce más allá del los devaneos de un yo ensimismado. El ejercicio de apreciación de los detalles, de las conexiones, de la complejidad, modifica la decisión misma: no se trata de elegir, sino de “ver” lo moral –la exigencia de la cosa–, igual que un artista cabal no pinta lo que “le gusta” sino “lo que está ahí”.

  14. CORRELACIÓN ENTRE LAS LESIONES MACROSCÓPICAS E HISTOPATOLÓGICAS DE LA NEUMONÍA ENZOÓTICA Y LA DETECCIÓN DEL Mycoplasma hyopneumoniaePOR PCR ANIDADA EN LAVADOS BRONCO ALVEOLARES EN CERDOS AL SACRIFICIO

    Directory of Open Access Journals (Sweden)

    H Guzmán

    2008-01-01

    Full Text Available Mycoplasma hyopneumoniae es el agente etiológico primario de la neumonía enzoótica (ne de los porcinos, y es el agente de mayor importancia involucrado en el Complejo res-piratorio Porcino (CrP. el propósito de este trabajo fue evaluar las lesiones en pulmones de 55 cerdos en planta de sacrificio procedentes de granjas de producción intensiva; las muestras fueron tomadas en forma aleatoria con base en lesiones sugestivas de ne y pulmo-nes aparentemente normales como controles para análisis histopatológico y para detección de adn de Mycoplasma hyopneumoniae en lavados bronco alveolares por PCr anidada. Las lesiones macroscópicas fueron evaluadas en términos de porcentaje de afección y las lesiones histopatológicas fueron clasificadas (de 0-4 según escala de severidad subjetiva, de acuerdo con el grado de hiperplasia de agregados linfoides asociados a bronquios, bron-quiolos y vasos sanguíneos (BaLT. Mediante la técnica de PCr anidada fueron positivas 54 de 55 muestras. Las lesiones histopatológicas del BaLT mostraron alta correlación con los hallazgos macroscópicos y con lesiones microscópicas de hiperplasia de células epite-liales e infiltración de células inflamatorias en vías aéreas. Los resultados demostraron que el PCr anidado es una herramienta complementaria importante para el diagnóstico de la presencia de Mycoplasma hyopneumoniae en afecciones respiratorias asociadas con ne y CRP de los porcinos al sacrificio.

  15. Unique psoriatic lesion versus multiple lesions

    Directory of Open Access Journals (Sweden)

    Anca Chiriac

    2014-10-01

    Full Text Available Aim: To evaluate the number of lesions of psoriasis and to find risk factors for multiple lesions. Material and Methods: 1,236 patients (male 54.13%, female 45.87% with psoriasis were seen over a period of 8 years in an Outpatient Clinic. Patients filled out questionnaires containing age at onset, number of lesions and location at the beginning of the disease, gender, type and localization of psoriasis at the time of clinical examination, psoriasis family history, previous treatment, comorbidities, and social status. Results: The number of psoriasis lesions correlates with: onset age of psoriasis (F=8.902, p=0.0029; age at the moment of clinical examination (F=8.902, p=0.0029; residence in rural area (χ2=8.589, p=0.00338, 95%CI; alcohol intake (χ2=16.47, p=0.00005, 95%CI; smoking (χ2=8.408, p=0.00373, 95%CI; occupation: workers/pupils/students (χ2=14.11, p=0.0069, 95%CI. Conclusions: There is a correlation between number of psoriatic lesions and some factors. Multiple lesions were observed in older patients, smokers and drinkers, coming from rural area and social active (workers and pupils/students. No correlation was statistically proved between number of lesions and gender, comorbidities and family history of psoriasis.

  16. Lesões precursoras do câncer cervicouterino: evolução histórica e subsídios para consulta de enfermagem ginecológica Lesiones precursoras del cáncer cervical-útero: evolución histórica consolidando la consulta de enfermería ginecológica Cervical-uterine cancer precursor lesions: historical evolution supporting the gynecological nursing consultation

    Directory of Open Access Journals (Sweden)

    Maria Cristina de Melo Pessanha Carvalho

    2010-09-01

    Full Text Available Estudo emergido de recorte de dissertação de mestrado, ilustrando a evolução histórica das lesões precursoras do câncer cervicouterino (LPCCU. Trata-se da história das LPCCU, delineando a relevância do conhecimento para prática do enfermeiro na área da saúde da mulher. O conceito de LPCCU inicia-se a partir do século XIX, dando início aos estudos das células alteradas. Objetivo: descrever as diversas fases da evolução histórica das alterações cervicais. Estudo qualitativo, descritivo-analítico, recorte temporal no período de 1940 a 2008. Dados levantados mediante bibliografia de fonte primária e recurso BIREME. Pontuaram-se as classificações que já existiram, destacando a Nomenclatura Brasileira, importante para corresponder às necessidades e o perfil da saúde das mulheres do Brasil. Este estudo é o ponto de partida para respaldar as práticas de consulta de enfermagem ginecológica com abordagens educativas, contemplando a população feminina em ações preventivas e incentivo ao tratamento.Estudio emergido de recorte de disertación de máster, ilustrando la evolución histórica de las lesiones precursoras del cáncer cervical-uterino (LPCCU. Se trata de la historia de las LPCCU, delineando la relevancia del conocimiento para la práctica del enfermero en cuidados en la salud de la mujer. El concepto de LPCCU se inicia a partir del siglo XIX, empezando los estudios de las células alteradas. Como objetivo: describir las diversas fases históricas de las alteraciones cervicales. Estudio cualitativo, descriptivo-analítico, recorte temporal en el período de 1940 hasta 2008. Datos acrecentados mediante bibliografía de fuente primaria y recurso BIREME. Se puntuó las diferentes clasificaciones que ya existieron, conde destaque para la nomenclatura brasileña, importante para corresponder a las necesidades y el perfil de la salud de las mujeres del Brasil. Esto estudio es el ponto de partida para respaldar las pr

  17. Hyaluronic acid production and hyaluronidase activity in the newt iris during lens regeneration

    Energy Technology Data Exchange (ETDEWEB)

    Kulyk, W.M.; Zalik, S.E.; Dimitrov, E.

    1987-09-01

    The process of lens regeneration in newts involves the dedifferentiation of pigmented iris epithelial cells and their subsequent conversion into lens fibers. In vivo this cell-type conversion is restricted to the dorsal region of the iris. We have examined the patterns of hyaluronate accumulation and endogenous hyaluronidase activity in the newt iris during the course of lens regeneration in vivo. Accumulation of newly synthesized hyaluronate was estimated from the uptake of (/sup 3/H)glucosamine into cetylpyridinium chloride-precipitable material that was sensitive to Streptomyces hyaluronidase. Endogenous hyaluronidase activity was determined from the quantity of reducing N-acetylhexosamine released upon incubation of iris tissue extract with exogenous hyaluronate substrate. We found that incorporation of label into hyaluronate was consistently higher in the regeneration-activated irises of lentectomized eyes than in control irises from sham-operated eyes. Hyaluronate labeling was higher in the dorsal (lens-forming) region of the iris than in ventral (non-lens-forming) iris tissue during the regeneration process. Label accumulation into hyaluronate was maximum between 10 and 15 days after lentectomy, the period of most pronounced dedifferentiation in the dorsal iris epithelium. Both normal and regenerating irises demonstrated a high level of endogenous hyaluronidase activity with a pH optimum of 3.5-4.0. Hyaluronidase activity was 1.7 to 2 times higher in dorsal iris tissue than in ventral irises both prior to lentectomy and throughout the regeneration process. We suggest that enhanced hyaluronate accumulation may facilitate the dedifferentiation of iris epithelial cells in the dorsal iris and prevent precocious withdrawal from the cell cycle. The high level of hyaluronidase activity in the dorsal iris may promote the turnover and remodeling of extracellular matrix components required for cell-type conversion.

  18. Virtual Ionosonde Construction by using ITS and IRI-2012 models

    Science.gov (United States)

    Kabasakal, Mehmet; Toker, Cenk

    2016-07-01

    Ionosonde is a kind of radar which is used to examine several properties of the ionosphere, including the electron density and drift velocity. Ionosonde is an expensive device and its installation requires special expertise and a proper area clear of sources of radio interference. In order to overcome the difficulties of installing an ionosonde hardware, the target of this study is to construct a virtual ionosonde based on communication channel models where the model parameters are determined by ray tracing obtained by the PHaRLAP software and the International Reference Ionosphere (IRI-2012) model. Although narrowband high frequency (HF) communication models have been widely used to represent the behaviour of the radio channel, they are applicable to a limited set of actual propagation conditions and wideband models are needed to better understand the HF channel. In 1997, the Institute for Telecommunication Science (ITS) developed a wideband HF ionospheric model, the so-called ITS model, however, it has some restrictions in real life applications. The ITS model parameters are grouped into two parts; the deterministic and the stochastic parameters. The deterministic parameters are the delay time (tau _{c}) of each reflection path based on the penetration frequency (f _{p}), the height (h _{0}) of the maximum electron density and the half thickness (sigma) of the reflective layer. The stochastic parameters, delay spread (sigma _{tau}), delay rise time (sigma _{c}), Doppler spread (sigma _{D}), Doppler shift (f _{s}), are to calculate the impulse response of the channel. These parameters are generally difficult to obtain and are based on the measured data which may not be available in all cases. In order to obtain these parameters, we propose to integrate the PHaRLAP ray tracing toolbox and the IRI-2012 model. When Total Electron Content (TEC) estimates obtained from GNSS measurements are input to IRI-2012, the model generates electron density profiles close to the

  19. Looking for gall bladder disease in the patient's iris.

    OpenAIRE

    Knipschild, P

    1988-01-01

    In alternative health care iridology is used as a diagnostic aid. The diagnosis of gall bladder disease was used to study its validity and interperformer consistency. The presence of an inflamed gall bladder containing gall stones is said to be easily recognised by certain signs in the lower lateral part of the iris of the right eye. Stereo colour slides were made of the right eye. Stereo colour slides were made of the right eye of 39 patients with this disease and 39 control subjects of the ...

  20. Thirty Years Supporting Portable Arrays: The IRIS Passcal Instrument Center

    Science.gov (United States)

    Beaudoin, B. C.; Anderson, K. R.; Bilek, S. L.; Woodward, R.

    2014-12-01

    Thirty years have passed since establishment of the IRIS Program for the Array Seismic Studies of the Continental Lithosphere (PASSCAL). PASSCAL was part of a coordinated plan proposed to the National Science Foundation (NSF) defining the instrumentation, data collection and management structure to support a wide range of research in seismology. The PASSCAL program has surpassed the early goal of 6000 data acquisition channels with a current inventory of instrumentation capable of imaging from the near surface to the inner core. Here we present the evolution of the PASSCAL program from instrument depot to full service community resource. PASSCAL has supported close to 1100 PI driven seismic experiments since its inception. Instruments from PASSCAL have covered the globe and have contributed over 7400 SEED stations and 242 assembled data sets to the IRIS Data Management Center in Seattle. Since the combination in 1998 of the Stanford and Lamont instrument centers into the single PASSCAL Instrument Center (PIC) at New Mexico Tech, the facility has grown in scope by adding the EarthScope Array Operations Facility in 2005, the incorporation of the EarthScope Flexible Array, and a Polar support group in 2006. The polar support group enhances portable seismic experiments in extremely harsh polar environments and also extends to special projects such as the Greenland Ice Sheet Monitoring Network (GLISN) and the recent development effort for Geophysical Earth Observatory for Ice Covered Environments (GEOICE). Through these support efforts the PIC has established itself as a resource for field practices, engineered solutions for autonomous seismic stations, and a pioneer in successful seismic recording in polar environments. We are on the cusp of a new generation of instrumentation driven in part by the academic community's desire to record unaliased wavefields in multiple frequency bands and industry's interest in utilizing lower frequency data. As part of the recently

  1. The Iris biometric feature segmentation using finite element method

    Directory of Open Access Journals (Sweden)

    David Ibitayo LANLEGE

    2015-05-01

    Full Text Available This manuscript presents a method for segmentation of iris images based on a deformable contour (active contour paradigm. The deformable contour is a novel approach in image segmentation. A type of active contour is the Snake. Snake is a parametric curve defined within the domain of the image. Snake properties are specified through a function called energy functional. This means they consist of packets of energy which expressed as partial Differential Equations. The partial Differential Equation is the controlling engine of the active contour since this project, the Finite Element Method (Standard Galerkin Method implementation for deformable model is presented.

  2. Iris sector heterochromia as a marker for neural crest disease.

    Science.gov (United States)

    Brazel, S M; Sullivan, T J; Thorner, P S; Clarke, M P; Hunter, W S; Morin, J D

    1992-02-01

    A 6-month-old female infant with biopsy-proved Hirschsprung's disease had associated sector heterochromia of the irides. The association between sector heterochromia and Hirschsprung's disease has been previously reported and both conditions have been ascribed to neural crest defects. Histologic characteristics of the ocular involvement have not previously been reported, to our knowledge. Histopathologic examination of the globes revealed decreased iris stroma, decreased pigmentation in the anterior stroma, and reduced numbers of pigment-producing cells in the affected areas. Both the ocular and gastrointestinal findings reflect abnormalities in tissues of neural crest origin.

  3. EST and EST-SSR marker resources for Iris

    Directory of Open Access Journals (Sweden)

    Taylor Christopher A

    2009-06-01

    Full Text Available Abstract Background Limited DNA sequence and DNA marker resources have been developed for Iris (Iridaceae, a monocot genus of 200–300 species in the Asparagales, several of which are horticulturally important. We mined an I. brevicaulis-I. fulva EST database for simple sequence repeats (SSRs and developed ortholog-specific EST-SSR markers for genetic mapping and other genotyping applications in Iris. Here, we describe the abundance and other characteristics of SSRs identified in the transcript assembly (EST database and the cross-species utility and polymorphisms of I. brevicaulis-I. fulva EST-SSR markers among wild collected ecotypes and horticulturally important cultivars. Results Collectively, 6,530 ESTs were produced from normalized leaf and root cDNA libraries of I. brevicaulis (IB72 and I. fulva (IF174, and assembled into 4,917 unigenes (1,066 contigs and 3,851 singletons. We identified 1,447 SSRs in 1,162 unigenes and developed 526 EST-SSR markers, each tracing a different unigene. Three-fourths of the EST-SSR markers (399/526 amplified alleles from IB72 and IF174 and 84% (335/399 were polymorphic between IB25 and IF174, the parents of I. brevicaulis × I. fulva mapping populations. Forty EST-SSR markers were screened for polymorphisms among 39 ecotypes or cultivars of seven species – 100% amplified alleles from wild collected ecotypes of Louisiana Iris (I.brevicaulis, I.fulva, I. nelsonii, and I. hexagona, whereas 42–52% amplified alleles from cultivars of three horticulturally important species (I. pseudacorus, I. germanica, and I. sibirica. Ecotypes and cultivars were genetically diverse – the number of alleles/locus ranged from two to 18 and mean heterozygosity was 0.76. Conclusion Nearly 400 ortholog-specific EST-SSR markers were developed for comparative genetic mapping and other genotyping applications in Iris, were highly polymorphic among ecotypes and cultivars, and have broad utility for genotyping applications within

  4. Remoción de terceros molares mandibulares con asistencia endoscópica: Nota técnica de un nuevo procedimiento quirúrgico para prevenir lesiones del NAI y formación de defectos óseos Removal of mandibular third molars with endoscopic approach: Technical note of a new surgical procedure to avoid IAN damage and bone defect formation

    Directory of Open Access Journals (Sweden)

    R Fuentes

    2012-08-01

    Full Text Available La variada posición anatómica de los terceros molares mandibulares presenta importantes desafíos asociados a su profundidad y grado de inclinación. Las complicaciones más habituales del procedimiento quirúrgico convencional de extracción se relacionan con la extensa osteotomía y poca visualización del sitio quirúrgico, que pueden generar consecuencias post-quirúrgicas como inflamación, dolor, trismus, lesiones reversibles e irreversibles del nervio alveolar inferior (NAI o nervio lingual, riesgo de fractura y formación de defectos periodontales del segundo molar. La implementación de soportes rígidos en la óptica endoscópica ha permitido utilizar esta tecnología para realizar abordajes mínimamente invasivos para remover terceros molares mediante accesos flapless con una mínima osteotomía de la zona oclusal, conservando la pared bucal y lingual a través de la visualización directa y magnificada del sitio quirúrgico, adaptable a los movimientos del paciente durante la intervención. En este reporte se presenta un nuevo procedimiento quirúrgico mínimamente invasivo a través de asistencia endoscópica para la conservación ósea en la remoción de terceros molares mandibulares con riesgo de lesión del nervio alveolar inferior.Anatomic variability of the position of mandibular third molars represents significant challenges associated with its depth and angulation. The most common complications of conventional surgical procedure are related to extensive osteotomy and poor visualization, which can cause postsurgical effects such as inflammation, pain, trismus, reversible and irreversible lesions of the inferior alveolar nerve (IAN or lingual nerve, fracture risk and formation of a deep periodontal defect on the distal aspect of the second molar. The implementation of rigid endoscopy in optics has allowed to use this technology via a minimally invasive approach to remove third molars by a minimally occlusal flapless ostectomy

  5. Revisión crítica sobre el síndrome del latigazo cervical (I): ¿de veras existe una lesión anatómica? A critical review of whiplash associated disorders (I): Is there really an anatomical lesion?

    OpenAIRE

    A. Ortega Pérez

    2003-01-01

    El síndrome del latigazo cervical (SLC) tiene una incidencia aproximada de 1 caso/1000 personas y año y unos costes personales y económicos muy altos. El mecanismo lesional puede ser más o menos complejo, según las direcciones relativas de los vehículos y la posición de la cabeza en el momento del impacto. Su clave parecen ser unos movimientos no fisiológicos de las vértebras cervicales y tan rápidos que los músculos que normalmente los frenan no tienen tiempo de hacerlo. En los impactos pued...

  6. Iris Marion Young's Imaginations of Gift Giving: Some Implications for the Teacher and the Student

    Science.gov (United States)

    Galea, Simone

    2006-01-01

    The paper discusses Iris Marion Young's idea of asymmetric reciprocity that rethinks typical understandings of gift giving. Iris Marion Young's proposals for asymmetric ethical relationships have important implications for democratic contexts that seek to take differences seriously. Imagining oneself in the place of the other or expecting from the…

  7. Gaze estimation for off-angle iris recognition based on the biometric eye model

    Science.gov (United States)

    Karakaya, Mahmut; Barstow, Del; Santos-Villalobos, Hector; Thompson, Joseph; Bolme, David; Boehnen, Christopher

    2013-05-01

    Iris recognition is among the highest accuracy biometrics. However, its accuracy relies on controlled high quality capture data and is negatively affected by several factors such as angle, occlusion, and dilation. Non-ideal iris recognition is a new research focus in biometrics. In this paper, we present a gaze estimation method designed for use in an off-angle iris recognition framework based on the ORNL biometric eye model. Gaze estimation is an important prerequisite step to correct an off-angle iris images. To achieve the accurate frontal reconstruction of an off-angle iris image, we first need to estimate the eye gaze direction from elliptical features of an iris image. Typically additional information such as well-controlled light sources, head mounted equipment, and multiple cameras are not available. Our approach utilizes only the iris and pupil boundary segmentation allowing it to be applicable to all iris capture hardware. We compare the boundaries with a look-up-table generated by using our biologically inspired biometric eye model and find the closest feature point in the look-up-table to estimate the gaze. Based on the results from real images, the proposed method shows effectiveness in gaze estimation accuracy for our biometric eye model with an average error of approximately 3.5 degrees over a 50 degree range.

  8. Influence of tamsulosin on the iris and its implications for cataract surgery.

    Science.gov (United States)

    Pärssinen, Olavi; Leppänen, Esa; Keski-Rahkonen, Pekka; Mauriala, Timo; Dugué, Benoit; Lehtonen, Marko

    2006-09-01

    To study iris-related complications during cataract surgery in patients on tamsulosin medication. Twenty-one consecutive cataract patients administered tamsulosin and 21 control patients were studied. Characteristics of the iris during surgery were recorded. Pupillary diameters of 16 patients were measured before and after iris dilatation. Tamsulosin concentrations in the aqueous humor and serum were analyzed. In five patients, surgery on the second eye was carried out after a 7- to 28-day pause in tamsulosin medication. Each patient administered tamsulosin had a sluggish hypotonic iris, along with a tendency toward miosis and a tendency for prolapse of the iris into the phaco tunnel or into the side port during cataract surgery. Sluggish irises also often adhered to the phaco tip or to the irrigation-aspiration tip. Despite a pause of 7 to 28 days in the use of tamsulosin, the adverse effects persisted. Tamsulosin concentrations varied between 0.1 and 1.0 ng/mL in the anterior chamber fluid. In three of five cases, tamsulosin remained in detectable amounts the aqueous humor after the 7- to 28-day pause. Preoperative pupillary diameter was smaller in the patients using tamsulosin than in the controls. Tamsulosin has selective alpha1A-adrenoreceptor antagonistic properties and obviously binds for a long period to the postsynaptic nerve endings of the iris dilator muscle, thus affecting iris dilatation and leading to complications in cataract surgery. The iris remained floppy after 7- to 28-day interruption of the tamsulosin regimen.

  9. Iris: Constructing and Analyzing Spectral Energy Distributions with the Virtual Observatory

    Science.gov (United States)

    Laurino, O.; Budynkiewicz, J.; Busko, I.; Cresitello-Dittmar, M.; D'Abrusco, R.; Doe, S.; Evans, J.; Pevunova, O.

    2014-05-01

    We present Iris 2.0, the latest release of the Virtual Astronomical Observatory application for building and analyzing Spectral Energy Distributions (SEDs). With Iris, users may read in and display SEDs inspect and edit any selection of SED data, fit models to SEDs in arbitrary spectral ranges, and calculate confidence limits on best-fit parameters. SED data may be loaded into the application from VOTable and FITS files compliant with the International Virtual Observatoy Alliance interoperable data models, or retrieved directly from NED or the Italian Space Agency Science Data Center; data in non-standard formats may also be converted within the application. Users may seamlessy exchange data between Iris and other Virtual Observatoy tools using the Simple Application Messaging Protocol. Iris 2.0 also provides a tool for redshifting, interpolating, and measuring integratd fluxes, and allows simple aperture corrections for individual points and SED segments. Custom Python functions, template models and template libraries may be imported into Iris for fitting SEDs. Iris may be extended through Java plugins; users can install third-party packages, or develop their own plugin using Iris' Software Development Kit. Iris 2.0 is available for Linux and Mac OS X systems.

  10. Gaze Estimation for Off-Angle Iris Recognition Based on the Biometric Eye Model

    Energy Technology Data Exchange (ETDEWEB)

    Karakaya, Mahmut [ORNL; Barstow, Del R [ORNL; Santos-Villalobos, Hector J [ORNL; Thompson, Joseph W [ORNL; Bolme, David S [ORNL; Boehnen, Chris Bensing [ORNL

    2013-01-01

    Iris recognition is among the highest accuracy biometrics. However, its accuracy relies on controlled high quality capture data and is negatively affected by several factors such as angle, occlusion, and dilation. Non-ideal iris recognition is a new research focus in biometrics. In this paper, we present a gaze estimation method designed for use in an off-angle iris recognition framework based on the ANONYMIZED biometric eye model. Gaze estimation is an important prerequisite step to correct an off-angle iris images. To achieve the accurate frontal reconstruction of an off-angle iris image, we first need to estimate the eye gaze direction from elliptical features of an iris image. Typically additional information such as well-controlled light sources, head mounted equipment, and multiple cameras are not available. Our approach utilizes only the iris and pupil boundary segmentation allowing it to be applicable to all iris capture hardware. We compare the boundaries with a look-up-table generated by using our biologically inspired biometric eye model and find the closest feature point in the look-up-table to estimate the gaze. Based on the results from real images, the proposed method shows effectiveness in gaze estimation accuracy for our biometric eye model with an average error of approximately 3.5 degrees over a 50 degree range.

  11. A Summary and Perspective of Recent IRIS Assessments and Impact on Planning Environmental Investigations

    Science.gov (United States)

    2011-03-30

    IRIS)  IRIS values also inform regulatory decisions (MCLs etc.) BUILDING STRONG® Emerging Contaminants (ECs)  Are chemicals or materials of...there is an existing health standard, but the standard is evolving or being re-evaluated. 4 Source: “Initiation of Emerging Contaminants Characterization

  12. Membrane degradation and phospholipase D activity during developmental cell death in Iris flowers

    NARCIS (Netherlands)

    Vrije, de T.; Schoot, van der C.; Pak, C.; Doorn, van W.G.

    1996-01-01

    Iris x hollandica (cv. Blue Magic) flowers show the first symptoms of senescence within 4 days after the onset of flower opening. Wilting of the tepals starts at the distal edges, rapidly proceeds to the base, and is followed by total discolouration of the tepal. Senescence of Iris flowers is not

  13. Lesiones bucales relacionadas con las enfermedades digestivas

    Directory of Open Access Journals (Sweden)

    José A. Pacho Saavedra

    2006-09-01

    Full Text Available Muchas de las lesiones de la mucosa en la cavidad bucal están relacionadas con trastornos anatómicos y funcionales de los órganos del aparato digestivo; algunas forman parte del cuadro clínico de la entidad y otras aparecen como complicaciones de estas. Generalmente son de orígenes inmunológicos, nutricionales o carenciales. Estas lesiones son difíciles de tratar, por lo que es importante conocer las características clínicas que faciliten una adecuada interpretación y al mismo tiempo ofrecer una conducta terapéutica correcta. Se presenta una revisión actualizada de las características semiológicas de las lesiones bucales que forman parte del cuadro clínico de diversas enfermedades digestivas, con el fin de que los médicos generales, clínicos, estomatólogos y gastroenterólogos puedan diagnosticarlas y brindar mejor orientación y tratamiento a los pacientes.Many of the lesions of the mucosa in the oral cavity are related to anatomical and functional disorders of the organs of the digestive system. Some of them are part of the clinical picture of the entity and others appear as complications of them. Generally, they have an immunological, nutritional, or deficiency origin. These lesions are difficult to be treated and that's why it is important to know the clinical characteristics making easy an adequate interpretation, and to follow a suitable therapeutic conduct at the same time. An updated review of the semiological features of the oral lesions corresponding to the clinical picture of diverse digestive diseases is presented, so that the general physicians, clinicians, stomatologists and gastroenterologists be able to diagnose and give a better guidance and treatment to the patients.

  14. Effectiveness of see-and-treat for approaching pre-invasive lesions of uterine cervix Efectividad del abordaje "ver y tratar" en lesiones pre-invasivas en el colon uterino Efetividade da abordagem "ver e tratar" em lesões pré-invasivas no colo uterino

    OpenAIRE

    Aparecida Cristina Sampaio Monteiro; Fábio Russomano; Aldo Reis; Maria José de Camargo; Susana Aidé Fialho; Maria Aparecida Tristão; Thiers Soares

    2009-01-01

    OBJECTIVE: To compare the effectiveness between the see-and-treat (S&T) approach and the conventional one (with prior biopsy) for squamous intraepithelial lesions of uterine cervix. METHODS: A cross-sectional study was conducted with 900 nonpregnant women with cytology suggestive of high grade squamous intraepithelial lesions in the city of Rio de Janeiro, Southeastern Brazil, between 1998 and 2004. The S&T approach consists of a large loop excision of the transformation zone procedure and is...

  15. Drawing up an individual risk index for development of metachronous neoplastic lesions in resected colorectal cancer Elaboración de un índice individual del riesgo para el desarrollo de lesiones neoplásicas metacrónicas en el cáncer colorrectal resecado

    OpenAIRE

    Ana Borda; José María Martínez-Peñuela; Fernando Borda; Miguel Muñoz-Navas; Francisco Javier Jiménez; Cristina Carretero

    2012-01-01

    Aim: to identify possible risk factors for the development of metachronous lesions in colorectal cancer (CRC) which would allow to establish a post-surgical individual prognostic index. Patients and methods: three hundred eighty-two surgically treated CRC were reviewed. We compared the incidence of metachronous lesions in 40 variables concerning patient clinical data and initial neoplastic findings. An individual risk index for metachronicity was drawn up including those variables which prese...

  16. Factors associated with prevalence of oral lesions and oral self-examination in young adults from a birth cohort in Southern Brazil Factores asociados a la prevalencia de lesiones bucales y a la realización del autoexamen bucal en adultos jóvenes de una cohorte de nacidos vivos del sur de Brasil Fatores associados à prevalência de lesões bucais e à realização do autoexame bucal em adultos jovens de uma coorte de nascidos vivos do Sul do Brasil

    Directory of Open Access Journals (Sweden)

    Marcos Britto Correa

    2013-01-01

    Full Text Available The objective of this study was to assess the prevalence and characteristics of oral lesions and oral self-examination and the association between these variables and life course determinants in a young population. A representative sample (n = 720 of all births occurring in Pelotas, Rio Grande do Sul State, Brazil, in 1982, was investigated and the outcomes were assessed in 2006. Data regarding exploratory variables was collected from other cohort waves. The prevalence of oral lesions was 23.3% (95%CI: 20.3-26.6. A total of 31% of individuals (95%CI: 27.6-34.4 reported never having performed oral self-examination. Multivariable analysis showed that low socio-economic status at birth, lack of oral hygiene instruction from a dentist up to the age of 15 years and smoking habits at the age of 22 year were associated with the presence of oral lesions. Performing oral self-examination was associated with high levels of maternal schooling at birth and having received oral hygiene orientation from a dentist up to the age of 15 years. Socioeconomic and behavioral factors are associated with both presence of oral mucosal lesions and the habit of performing self-examination.El objetivo fue determinar la prevalencia y características de lesiones bucales, autoexamen bucal, y sus asociaciones con determinantes a lo largo de la vida, en una población de adultos jóvenes. Fue investigada una muestra representativa (n = 720 de los nacidos en Pelotas, Río Grande do Sul, Brasil, 1982, y la presencia de lesiones bucales y realización del autoexamen fueron verificadas a los 24 años. Las variables independientes se obtuvieron de otros seguimientos de esta cohorte. La prevalencia de lesiones bucales fue de un 23,3% (IC95%: 20,3-26,6 y un 31% de los individuos (IC95%: 27,6-34,4 relató no haber realizado nunca el autoexamen de la boca. El análisis multivariable mostró que el bajo nivel socioeconómico en el momento del nacimiento, el no haber recibido instrucci

  17. The InfraRed Imaging Spectrograph (IRIS) for TMT: latest science cases and simulations

    CERN Document Server

    Wright, Shelley A; Do, Tuan; Marshall, Daniel; Larkin, James E; Moore, Anna M; Adamkovics, Mate; Andersen, David; Armus, Lee; Barth, Aaron; Cote, Patrick; Cooke, Jeff; Chisholm, Eric M; Davidge, Timothy; Dunn, Jennifer S; Dumas, Christophe; Ellerbroeck, Brent L; Ghez, Andrea M; Hao, Lei; Hayano, Yutaka; Liu, Michael; Lopez-Rodriguez, Enrique; Lu, Jessica R; Mao, Shude; Marois, Christian; Pandey, Shashi B; Philips, Andrew C; Schoeck, Matthias; Subramaniam, Annapurni; Subramanian, Smitha; Suzuki, Ryuji; Tan, Jonathan C; Terai, Tsuyoshi; Treu, Tommaso; Simard, Luc; Weiss, Jason L; Wincensten, James; Wong, Michael; Zhang, Kai

    2016-01-01

    The Thirty Meter Telescope (TMT) first light instrument IRIS (Infrared Imaging Spectrograph) will complete its preliminary design phase in 2016. The IRIS instrument design includes a near-infrared (0.85 - 2.4 micron) integral field spectrograph (IFS) and imager that are able to conduct simultaneous diffraction-limited observations behind the advanced adaptive optics system NFIRAOS. The IRIS science cases have continued to be developed and new science studies have been investigated to aid in technical performance and design requirements. In this development phase, the IRIS science team has paid particular attention to the selection of filters, gratings, sensitivities of the entire system, and science cases that will benefit from the parallel mode of the IFS and imaging camera. We present new science cases for IRIS using the latest end-to-end data simulator on the following topics: Solar System bodies, the Galactic center, active galactic nuclei (AGN), and distant gravitationally-lensed galaxies. We then briefl...

  18. [Use of computer technologies for studying the morphological characteristics of the iris color in anthropology].

    Science.gov (United States)

    Dorofeeva, A A; Khrustalev, A V; Krylov, Iu V; Bocharov, D A; Negasheva, M A

    2010-01-01

    Digital images of the iris were received for study peculiarities of the iris color during the anthropological examination of 578 students aged 16-24 years. Simultaneously with the registration of the digital images, the visual assessment of the eye color was carried out using the traditional scale of Bunak, based on 12 ocular prostheses. Original software for automatic determination of the iris color based on 12 classes scale of Bunak was designed, and computer version of that scale was developed. The software proposed allows to conduct the determination of the iris color with high validity based on numerical evaluation; its application may reduce the bias due to subjective assessment and methodological divergences of the different researchers. The software designed for automatic determination of the iris color may help develop both theoretical and applied anthropology, it may be used in forensic and emergency medicine, sports medicine, medico-genetic counseling and professional selection.

  19. Free-Floating Iris Cyst in a Patient with Recurrent Iritis

    Science.gov (United States)

    Teong, Joanne M.Y.; Adler, Paul A.; Fuzzard, Dujon R.W.

    2015-01-01

    Purpose We describe an unusual clinical finding of a free-floating iris cyst in a patient with recurrent iritis. Method The clinical finding of a free-floating iris cyst was recorded using slit-lamp photography. Results A 39-year-old male with a 5-year history of recurrent right iritis was found to have a small mobile iris cyst within his right anterior chamber, first identified 3 years ago. The patient did not experience any discomfort or visual symptoms resulting from the cyst. Conclusion Surgical removal is not indicated for asymptomatic non-progressive free-floating iris cysts. The significance of a free-floating iris cyst in the setting of recurrent iritis remains unknown. PMID:26120316

  20. Performance evaluation of IRI-2007 at equatorial latitudes and its Matlab version for GNSS applications

    Science.gov (United States)

    Satya Srinivas, V.; Sarma, A. D.; Swamy, K. C. T.; Satyanarayana, K.

    2013-11-01

    International Reference Ionosphere (IRI) model is the widely used empirical model for ionospheric predictions, especially TEC which is an important parameter for radio navigation and communication. The Fortran based IRI-2007 does not support real-time interactive visualization and debugging. Therefore, the source code is converted into Matlab and is validated for the purposes of this study. This facilitates easy representation of results and for near real-time implementation of IRI in the applications including spacecraft launching, now casting, pseudolite based navigation systems etc. In addition, the vertical delay results over the equatorial region derived from IRI and GPS data of three IGS stations namely Libreville (Garbon, Africa), Brasilia (Brazil, South America) and Hyderabad (India, Asia) are compared. As the IRI model does not account for plasmasphere TEC, the vertical delays are underestimated compared to vertical delays of GPS signals. Therefore, the model should be modified accordingly for precise TEC estimation.

  1. A Narrative Methodology to Recognize Iris Patterns By Extracting Features Using Gabor Filters and Wavelets

    Directory of Open Access Journals (Sweden)

    Shristi Jha

    2016-01-01

    Full Text Available Iris pattern Recognition is an automated method of biometric identification that uses mathematical pattern-Recognition techniques on images of one or both of the irises of an individual’s eyes, whose complex random patterns are unique, stable, and can be seen from some distance. Iris recognition uses video camera technology with subtle near infrared illumination to acquire images of the detail-rich, intricate structures of the iris which are visible externally. In this narrative research paper the input image is captured and the success of the iris recognition depends on the quality of the image so the captured image is subjected to the preliminary image preprocessing techniques like localization, segmentation, normalization and noise detection followed by texture and edge feature extraction by using Gabor filters and wavelets then the processed image is matched with templates stored in the database to detect the Iris Patterns.

  2. Twin Layer Iris Certification for Confidential Archive by Conceiving Shares (ICCA-CS

    Directory of Open Access Journals (Sweden)

    R. Sinduja

    2013-02-01

    Full Text Available Iris is one of the most challenging biometric techniques. In many proposed biometric recognition technique, template’s are store in the database for comparison. But there exists a vital problem in storing the template in the database since it can be easily bootlegged. In order to overcome these issues a novel method for person identification by their Iris, through securely storing the template is proposed. Visual Cryptography Encryption (VCE technique is used for securely storing the iris template. By means of VCE, shares are generated for the iris template which is stored in the database instead of storing the entire template. Shares are generated by pixel expansion method. Authentication is provided by comparing the shares. Comparison is done by using Hamming Code. So it is a very effective method of person identification. The proposed method gives an extra security in iris recognition.

  3. Measuring Biometric Sample Quality in terms of Biometric Feature Information in Iris Images

    Directory of Open Access Journals (Sweden)

    R. Youmaran

    2012-01-01

    Full Text Available This paper develops an approach to measure the information content in a biometric feature representation of iris images. In this context, the biometric feature information is calculated using the relative entropy between the intraclass and interclass feature distributions. The collected data is regularized using a Gaussian model of the feature covariances in order to practically measure the biometric information with limited data samples. An example of this method is shown for iris templates processed using Principal-Component Analysis- (PCA- and Independent-Component Analysis- (ICA- based feature decomposition schemes. From this, the biometric feature information is calculated to be approximately 278 bits for PCA and 288 bits for ICA iris features using Masek's iris recognition scheme. This value approximately matches previous estimates of iris information content.

  4. Secure and Robust Iris Recognition Using Random Projections and Sparse Representations.

    Science.gov (United States)

    Pillai, Jaishanker K; Patel, Vishal M; Chellappa, Rama; Ratha, Nalini K

    2011-09-01

    Noncontact biometrics such as face and iris have additional benefits over contact-based biometrics such as fingerprint and hand geometry. However, three important challenges need to be addressed in a noncontact biometrics-based authentication system: ability to handle unconstrained acquisition, robust and accurate matching, and privacy enhancement without compromising security. In this paper, we propose a unified framework based on random projections and sparse representations, that can simultaneously address all three issues mentioned above in relation to iris biometrics. Our proposed quality measure can handle segmentation errors and a wide variety of possible artifacts during iris acquisition. We demonstrate how the proposed approach can be easily extended to handle alignment variations and recognition from iris videos, resulting in a robust and accurate system. The proposed approach includes enhancements to privacy and security by providing ways to create cancelable iris templates. Results on public data sets show significant benefits of the proposed approach.

  5. Free-Floating Iris Cyst in a Patient with Recurrent Iritis

    Directory of Open Access Journals (Sweden)

    Joanne M.Y. Teong

    2015-06-01

    Full Text Available Purpose: We describe an unusual clinical finding of a free-floating iris cyst in a patient with recurrent iritis. Method: The clinical finding of a free-floating iris cyst was recorded using slit-lamp photography. Results: A 39-year-old male with a 5-year history of recurrent right iritis was found to have a small mobile iris cyst within his right anterior chamber, first identified 3 years ago. The patient did not experience any discomfort or visual symptoms resulting from the cyst. Conclusion: Surgical removal is not indicated for asymptomatic non-progressive free-floating iris cysts. The significance of a free-floating iris cyst in the setting of recurrent iritis remains unknown.

  6. Fractional Scaling Analysis for IRIS pressurizer reduced scale experiments

    Energy Technology Data Exchange (ETDEWEB)

    Bezerra da Silva, Mario Augusto, E-mail: mabs500@gmail.co [Departamento de Energia Nuclear - Centro de Tecnologia e Geociencias, Universidade Federal de Pernambuco, Av. Prof. Luiz Freire, 1000, 50740-540 Recife, PE (Brazil); Brayner de Oliveira Lira, Carlos Alberto, E-mail: cabol@ufpe.b [Departamento de Energia Nuclear - Centro de Tecnologia e Geociencias, Universidade Federal de Pernambuco, Av. Prof. Luiz Freire, 1000, 50740-540 Recife, PE (Brazil); Oliveira Barroso, Antonio Carlos de, E-mail: barroso@ipen.b [Instituto de Pesquisas Energeticas e Nucleares - Comissao Nacional de Energia Nuclear, Av. Prof. Lineu Prestes, 2242, 05508-900 Cidade Universitaria, Sao Paulo (Brazil)

    2010-10-15

    About twenty organizations joined in a consortium led by Westinghouse to develop an integral, modular and medium size pressurized water reactor (PWR), known as international reactor innovative and secure (IRIS), which is characterized by having most of its components inside the pressure vessel, eliminating or minimizing the probability of severe accidents. The pressurizer is responsible for pressure control in PWRs. A small continuous flow is maintained by the spray system in conventional pressurizers. This mini-flow allows a mixing between the reactor coolant and the pressurizer water, warranting acceptable limits for occasional differences in boron concentrations. There are neither surge lines nor spray in IRIS pressurizer, but surge and recirculation orifices that promote a circulation flow between primary system and pressurizer, avoiding power transients whether outsurges occur. The construction of models is a routine practice in engineering, being supported by similarity rules. A new method of scaling systems, Fractional Scaling Analysis, has been successfully used to analyze pressure variations, considering the most relevant agents of change. The aim of this analysis is to obtain the initial boron concentration ratio and the volumetric flows that ensure similar behavior for boron dispersion in a prototype and its model.

  7. TEC Longitude Difference Using GIMS and the IRI Model

    Science.gov (United States)

    Natali, Maria Paula; Meza, Amalia Margarita; Mendoza, Gastón

    2016-07-01

    The main geomagnetic field declination has a global distribution with positive and negative values showing maximum east-west differences over North America and Oceania and minimum differences over America and Asia. Several authors study one or more of these regions using TEC data derived from GNSS observations to describe variations in TEC. They reported a pronounced longitudinal variation respect to zero magnetic declination. One of the important factors that cause the longitude difference at mid-latitude is a combined effect of the longitude variations of magnetic declination and the variations of the zonal thermospheric winds with local time. We propose to study this effect using Global Ionospheric Maps (GIMs) and the respective TEC values generated from the International Reference Ionospheric (IRI) model, during a solar cycle, applying Principal Component Analysis (PCA). Our works is focused over different local times and regions at mid-latitude. PCA involves a mathematical procedure that transforms a number of correlated variables into a number of uncorrelated variables using the data itself. The spatial structure of the ionosphere variability and its temporal evolution, together are called modes, and there are ordered according to their percentage of the variability of data from highest to lowest. In this analysis the first mode has more than the 90 % of the variability, representing the nominal behavior of the ionosphere, and the second and third modes are the more important for our analysis, because they show the strong longitudinal variation in the different regions using either GIMs or the IRI model.

  8. Posterior Iris Fixated Intraocular Lens for Pediatric Traumatic Cataract

    Science.gov (United States)

    Kavitha, V.; Balasubramanian, Preethi; Heralgi, Mallikarjun M.

    2016-01-01

    Purpose: To evaluate the postoperative visual outcomes and complications of posterior iris fixated intraocular lens (IFIOL) implantation for pediatric traumatic cataract. Methods: A retrospective clinical audit was performed of all the pediatric traumatic cataract patients who underwent lens removal and iris fixated lens implantation due to inadequate capsular support with or without corneal tear repair between January 2009 and December 2013. Data were collected and analyzed on the preoperative and postoperative visual outcomes and complications. Results: Twenty-five children (25 eyes; 21 males and 4 females) were enrolled with the mean age of 11 ± 4.0 years. There were 72% of eyes that underwent primary cataract removal with IFIOL implantation. Twenty-eight percent of eyes underwent corneal tear repair prior to intraocular lens (IOL) implantation. Preoperative best corrected visual acuity (BCVA) was hand motion in 32% eyes, counting fingers in 24%, and perception of light in 44%. Postoperative BCVA of 0-0.2 logarithm of minimum angle of resolution was reported in the 64% of eyes. One eye developed secondary glaucoma, one eye underwent re-enclavation, and none developed retinal complications. Conclusion: Posterior IFIOL implantation resulted in an improved visual outcome, low incidence of postoperative complications, and is a good alternative to other IOL, in the cases of pediatric traumatic cataract without adequate capsular support. PMID:27162456

  9. Unilatelaral iris plateau syndrome after the use of ecstasy

    Directory of Open Access Journals (Sweden)

    Jovanović Predrag

    2009-01-01

    Full Text Available Bacground. Courmon street name for 3,4-Methylenedioxymethamphetamine (MDMA is ecstasy. This widely abused 'recreational' drug causes both an increased release of monoamine neurotransmitters, including serotonine and dopamine, and an increased reuptake inhibition of serotonin. As a consequence, mydriasis and increased intraocular pressure (IOP in predisposed patients occur. We present herein a rare case of acute increased IOP after use of ecstasy. Case report. A female patient, aged 38 years, visited doctor complaing of a decreased vision acuity and severe pain in the left eye and in the left part of the head. The initial treatment was urgent antiglaucomatous therapy followed by withdrawal of subjective problems of the patient and improvement of objective finding. History taking procedure reveled that just before the onset of the pain the patient had used ecstasy and had had similar 'experience' 6 years ago after cocaine snorting. She had not been to a doctor although she had experienced sporadic migrenous pain. Previous medical records excavation of revealed optic disk (cup-to-dise C/D=06, Bjerum arcuate scotoma and iris plateau with narrow chamber angle (Scheie II- III so the diagnosis was a rare unilateral iris plateau syndrome of the left eye. Although the patient was given some pieces of information about the dangerous and possible deadly consequences of psychoactive substance abuse, she has not continue the treatment. Conclusion. Ecstasy abuse might cause a complete loss of vision, thus medicametous and surgical treatment are obligatory.

  10. Noninvasive in vivo glucose sensing using an iris based technique

    Science.gov (United States)

    Webb, Anthony J.; Cameron, Brent D.

    2011-03-01

    Physiological glucose monitoring is important aspect in the treatment of individuals afflicted with diabetes mellitus. Although invasive techniques for glucose monitoring are widely available, it would be very beneficial to make such measurements in a noninvasive manner. In this study, a New Zealand White (NZW) rabbit animal model was utilized to evaluate a developed iris-based imaging technique for the in vivo measurement of physiological glucose concentration. The animals were anesthetized with isoflurane and an insulin/dextrose protocol was used to control blood glucose concentration. To further help restrict eye movement, a developed ocular fixation device was used. During the experimental time frame, near infrared illuminated iris images were acquired along with corresponding discrete blood glucose measurements taken with a handheld glucometer. Calibration was performed using an image based Partial Least Squares (PLS) technique. Independent validation was also performed to assess model performance along with Clarke Error Grid Analysis (CEGA). Initial validation results were promising and show that a high percentage of the predicted glucose concentrations are within 20% of the reference values.

  11. RANK LEVEL FUSION USING FINGERPRINT AND IRIS BIOMETRICS

    Directory of Open Access Journals (Sweden)

    N. Radha

    2011-12-01

    Full Text Available Authentication of users is an essential and difficult to achieve in all systems. Shared secrets like Personal Identification Numbers (PIN or Passwords and key devices such as Smart cards are not presently sufficient in few situations. The biometric improves the capability to recognize the persons. A biometric identificationsystem is an automatic recognition system that recognizes a person based on the physiological (e.g., fingerprints,face, retina, iris, ear or behavioral (e.g., gait, signature, voice characteristics. In many real-world applications,unimodal biometric systems often face has significant limitations due to sensitivity to noise, intra classvariability, data quality, non-universality, and other factors. Multimodal biometric systems overcome some of these limitations. Multimodal biometric system provides more accuracy when compared to unimodal biometric system. The main goal of multimodal biometric system is to develop the security system for the areas that require high level of security. The proposed system focused on developing a multimodal biometrics system,which uses biometrics such as fingerprint and iris. Fusion of biometrics is performed by means of rank level fusion. The features from the biometrics are obtained by using the FLD (Fisher Linear Discriminant. The experimental result shows the performance of the proposed multimodal biometrics system. In this paper, the decision is made using rank level fusion and the ranks of individual persons are calculated using the Borda count, and Logistic regression approaches.

  12. Human Iris Recognition System using Wavelet Transform and LVQ

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Kwan Yong; Lim, Shin Young [Electronics and Telecommunications Research Institute (Korea); Cho, Seong Won [Hongik University (Korea)

    2000-07-01

    The popular methods to check the identity of individuals include passwords and ID cards. These conventional methods for user identification and authentication are not altogether reliable because they can be stolen and forgotten. As an alternative of the existing methods, biometric technology has been paid much attention for the last few decades. In this paper, we propose an efficient system for recognizing the identity of a living person by analyzing iris patterns which have a high level of stability and distinctiveness than other biometric measurements. The proposed system is based on wavelet transform and a competitive neural network with the improved mechanisms. After preprocessing the iris data acquired through a CCD camera, feature vectors are extracted by using Haar wavelet transform. LVQ(Learning Vector Quantization) is exploited to classify these feature vectors. We improve the overall performance of the proposed system by optimizing the size of feature vectors and by introducing an efficient initialization of the weight vectors and a new method for determining the winner in order to increase the recognition accuracy of LVQ. From the experiments, we confirmed that the proposed system has a great potential of being applied to real applications in an efficient and effective way. (author). 14 refs., 13 figs., 7 tabs.

  13. Some Physiological Responses of Chinese Iris to Salt Stress

    Institute of Scientific and Technical Information of China (English)

    BAI Wen-Bo; LI Pin-Fang; LI Bao-Guo; H. FUJIYAMA; FAN Fen-Cheng

    2008-01-01

    Chinese iris (Iris lactea Pall. Var. Chinensis (Fisch) Koidz.), a robust iridaceous plant, is widesprcad in arid and semiarid regions with high salinity. However, the mechanism of its salt tolerance is not well understood. In this study,plant growth, water status, content and distribution of inorganic ions, cell membrane permeability, and proline content of I. Lactea under salt stress were investigated using nutrient solutions with six NaCl concentrations ranging from 0 to 350 mmol L-1. The results indicated that the biomass, height, fresh weight, K+ content, and K+/Na+ and Ca2+/Na+ratios decreased with increasing NaCl stress, whereas plant water deficit and contents of Na+ and Cl- increased with increasing NaCl stress. In all salt treatments, water deficit of shoots was found to be higher than that of roots and had a positive correlation with salt concentration. When the NaCl concentration was less than 280 mmol L-1, the ion absorption selectivity ratio and the transportation selectivity ratio sharply increased with increasing NaCl stress. Under medium salt stress, I. Lactea exhibited a strong K+ selective absorption and the transportation of K+ from roots to shoots increased, whereas Na+ was not transported and was mostly retained in roots. The plants were able to maintain osmotic adjustment through the accumulation of Na+, Cl-, and proline. On the basis of its biomass production under salt stress,I. Lactea could be considered as a facultative halophyte.

  14. Foreign body embedded in the iris after cataract surgery.

    Science.gov (United States)

    Santos-Bueso, E; Jiménez-Santos, M; Díaz-Valle, D; Gegúndez-Fernández, J A; Cuiña-Sardiña, R; Benítez-del-Castillo, J M; García-Sánchez, J

    2016-03-01

    a 75-year old woman who had had cataract surgery in her left eye and showed a visual acuity of 0.8 twenty-four hours post-surgery. Biomicroscopy revealed a foreign body attached to the iris in the nasal sector that coincided with the main incision of the phacoemulsification, which was then removed in a second surgical procedure. It was analysed and described as an inert structure made of plastic. The possible origin of the presence of a fragment of plastic in the postoperative period following cataract surgery is established. In this case, its inert nature did not cause any further intraocular inflammation. Its rigid structure also favoured its attachment to the iris, thus avoiding any other complications. There must be greater preventative measures during cataract surgery, including checking the instruments and accessories before and after the surgical procedure. Copyright © 2015 Sociedad Española de Oftalmología. Published by Elsevier España, S.L.U. All rights reserved.

  15. The Infrared Imaging Surveyor (Iris) Project: Astro-F

    Science.gov (United States)

    Shibai, H.

    IRIS (Infrared Imaging Surveyor) is the first Japanese satellite dedicated solely to infrared astronomy. The telescope has 70-cm aperture, and is cooled down to 6 K with super-fluid helium assisted by two-stage Stirling cycle coolers. On the focal plane, the two instruments, the InfraRed Camera (IRC) and the Far-Infrared Surveyor (FIS), are mounted. IRC is a near- and mid-infrared camera for deep imaging-surveys in the wavelength region from 2 to 25 microns. FIS is a far-infrared instrument for a whole sky survey in the wavelength region from 50 to 200 microns. The diffraction-limited spatial resolution is achieved except in the shortest waveband. The point source sensitivity and the survey coverage are significantly improved compared to previous missions. The primary scientific objective is to investigate birth and evolution of galaxies in the early universe by surveys of young normal galaxies and starburst galaxies. IRIS is thrown by a Japanese M-V rocket into a sun-synchronous orbit, in which the cooled telescope can avoid huge emissions from the Sun and the Earth. The expected holding time of the super-fluid helium is more than one year. After consumption of the helium, the near-infrared observation can be continued by the mechanical coolers

  16. Comparison of GPS-TEC measurements with IRI-2007 and IRI-2012 modeled TEC at an equatorial latitude station, Bangkok, Thailand

    Science.gov (United States)

    Arunpold, Sanit; Tripathi, Nitin K.; Rajesh Chowdhary, V.; Raju, Durairaju Kumaran

    2014-09-01

    This paper presents the first vertical total electron content (VTEC) data derived from a dual-frequency GPS receiver installed at the Asian Institute of Technology in Bangkok, as part of project SCINDA (Scintillation Network and Decision Aid) with a magnetic dip latitude of 14°N, The diurnal, monthly, and seasonal variation in TEC, measured between August 2010 and July 2012, was compared with values derived from two International Reference Ionosphere (IRI) models: the IRI-2007 and the recently released IRI-2012. The highest diurnal TEC always occurred between 08:00 and 12:00 Universal Time (UT). The diurnal pattern of GPS-TEC reached its maximum values during equinoctial months (March, April, September, and October) and minimum values during solstice months (June, July, December, and January), which can be attributed to the solar extreme ultra-violet ionization coupled with the upward vertical E×B drift. The modeled TEC was underestimated in 2010 and 2011 and overestimated in 2012, especially with the IRI-2007 model. The measured values were better correlated with the IRI-2012 model, especially in 2012. However, neither of the IRI models responded to geomagnetic activity, despite the selection of the “storm” option, generally showing a smooth curve and underestimating TEC during a storm. To verify this phenomenon, the impacts of geomagnetic storms were considered.

  17. Detección del DNA de Papilomavirus humano en lesiones precancerosas y cancerosas de cuello uterino por reacción en cadena de la polimerasa, en Bucaramanga, Santander

    Directory of Open Access Journals (Sweden)

    Vargas CI.

    2001-06-01

    Full Text Available Estudios epidemiológicos demuestran convincentemente que el factor de mayor riesgo para eldesarrollo del cáncer cervical, es la infección del virus del papiloma humano (VPH, el cualsobrepasa otros factores de riesgo. En nuestro departamento, el cáncer que presenta mayorincidencia en la población femenina es el de cérvix, por lo tanto, la detección de los diferentestipos de VPH que infectan el tracto reproductor femenino es importante para la prevencióny el control de esta malignidad.

  18. Ghost cell lesions

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    E Rajesh

    2015-01-01

    Full Text Available Ghost cells have been a controversy for a long time. Ghost cell is a swollen/enlarged epithelial cell with eosnophilic cytoplasm, but without a nucleus. In routine H and E staining these cells give a shadowy appearance. Hence these cells are also called as shadow cells or translucent cells. The appearance of these cells varies from lesion to lesion involving odontogenic and nonodontogenic lesions. This article review about the origin, nature and significance of ghost cells in different neoplasms.

  19. Fluid and structure coupling analysis of the interaction between aqueous humor and iris.

    Science.gov (United States)

    Wang, Wenjia; Qian, Xiuqing; Song, Hongfang; Zhang, Mindi; Liu, Zhicheng

    2016-12-28

    Glaucoma is the primary cause of irreversible blindness worldwide associated with high intraocular pressure (IOP). Elevated intraocular pressure will affect the normal aqueous humor outflow, resulting in deformation of iris. However, the deformation ability of iris is closely related to its material properties. Meanwhile, the passive deformation of the iris aggravates the pupillary block and angle closure. The nature of the interaction mechanism of iris deformation and aqueous humor fluid flow has not been fully understood and has been somewhat a controversial issue. The purpose here was to study the effect of IOP, localization, and temperature on the flow of the aqueous humor and the deformation of iris interacted by aqueous humor fluid flow. Based on mechanisms of aqueous physiology and fluid dynamics, 3D model of anterior chamber (AC) was constructed with the human anatomical parameters as a reference. A 3D idealized standard geometry of anterior segment of human eye was performed. Enlarge the size of the idealization geometry model 5 times to create a simulation device by using 3D printing technology. In this paper, particle image velocimetry technology is applied to measure the characteristic of fluid outflow in different inlet velocity based on the device. Numerically calculations were made by using ANSYS 14.0 Finite Element Analysis. Compare of the velocity distributions to confirm the validity of the model. The fluid structure interaction (FSI) analysis was carried out in the valid geometry model to study the aqueous flow and iris change. In this paper, the validity of the model is verified through computation and comparison. The results indicated that changes of gravity direction of model significantly affected the fluid dynamics parameters and the temperature distribution in anterior chamber. Increased pressure and the vertical position increase the velocity of the aqueous humor fluid flow, with the value increased of 0.015 and 0.035 mm/s. The results

  20. Positive Selection of Iris, a Retroviral Envelope-Derived Host Gene in Drosophila melanogaster.

    Directory of Open Access Journals (Sweden)

    2005-10-01

    Full Text Available Eukaryotic genomes can usurp enzymatic functions encoded by mobile elements for their own use. A particularly interesting kind of acquisition involves the domestication of retroviral envelope genes, which confer infectious membrane-fusion ability to retroviruses. So far, these examples have been limited to vertebrate genomes, including primates where the domesticated envelope is under purifying selection to assist placental function. Here, we show that in Drosophila genomes, a previously unannotated gene (CG4715, renamed Iris was domesticated from a novel, active Kanga lineage of insect retroviruses at least 25 million years ago, and has since been maintained as a host gene that is expressed in all adult tissues. Iris and the envelope genes from Kanga retroviruses are homologous to those found in insect baculoviruses and gypsy and roo insect retroviruses. Two separate envelope domestications from the Kanga and roo retroviruses have taken place, in fruit fly and mosquito genomes, respectively. Whereas retroviral envelopes are proteolytically cleaved into the ligand-interaction and membrane-fusion domains, Iris appears to lack this cleavage site. In the takahashii/suzukii species groups of Drosophila, we find that Iris has tandemly duplicated to give rise to two genes (Iris-A and Iris-B. Iris-B has significantly diverged from the Iris-A lineage, primarily because of the "invention" of an intron de novo in what was previously exonic sequence. Unlike domesticated retroviral envelope genes in mammals, we find that Iris has been subject to strong positive selection between Drosophila species. The rapid, adaptive evolution of Iris is sufficient to unambiguously distinguish the phylogenies of three closely related sibling species of Drosophila (D. simulans, D. sechellia, and D. mauritiana, a discriminative power previously described only for a putative "speciation gene." Iris represents the first instance of a retroviral envelope-derived host gene