1,051 research outputs found
Estudio de algunos bronces hallados en los yacimientos vacceos de Coca y la Cuesta del Mercado (Segovia, España)
El objetivo de este trabajo es dar a conocer algunas piezas de bronce halladas
hace años en la ciudad vaccea de Cauca (Coca) y el castro protohistórico que se encuentra
a unos 600 metros de esta, la Cuesta del Mercado, ambos en la provincia de Segovia. Se procederá a la realización de su estudio con el fin de aproximarnos
a su cronología y a posible
funcionalidad. Para ello, ha sido necesario realizar una labor de limpieza que permitiese
analizar el tipo de decoración de cada pieza, poder compararlas con otras encontradas en
la misma zona antes y con otros yacimientos vacceos, y conocer el máximo número de
datos sobre ellasThe purpose of this paper is to show some new bronze pieces from the Vaccaean
city of Cauca (Coca) and the protohistoric settlement of Cuesta del Mercado, both in the province of Segovia. A study of materials found will be executed in
order to know their chronology and their functionality. For this purpose, it was
necessary to tackle a
cleaning process, the analysis of the decoration of each piece and the place where they
were found. They could be compared with many other pieces found in the same area
before and other vaccaean places. In this way, we could give light to the maximum details
about the
Exploring multiple-discreteness in freight transport : a multiple discrete extreme value model application for grain consolidators in Argentina
There are some examples where freight choices may be of a multiple discrete nature, especially the ones at more tactical levels of planning. Nevertheless, this has not been investigated in the literature, although several discrete-continuous models for mode/vehicle type and shipment size choice have been developed in freight transport. In this work, we propose that the decision of port and mode of the grain consolidators in Argentina is of a discrete-continuous nature, where they can choose more than one alternative and how much of their production to send by each mode. The Multiple Discrete Extreme Value Model (MDCEV) framework was applied to a stated preference data set with a response variable that allowed this multiple-discreteness. To our knowledge, this is the only application of the MDCEV in regional freight context. Free alongside ship price, freight transport cost, lead-time and travel time were included in the utility function and observed and random heterogeneity was captured by the interaction with the consolidator’s characteristics and random coefficients. In addition, different discrete choice models were used to compare the forecasting performance, willingness to pay measures and structure of the utility function against
Peri-implantitis and maxillary sinus membrane thickening: A retrospective cohort study.
OBJECTIVE
The objective of this study is to investigate the association of peri-implantitis (PI) and sinus membrane thickening and to assess the resolution of membrane thickening following intervention (implant removal or peri-implantitis treatment) aimed at arresting PI.
MATERIALS AND METHODS
Forty-five patients with 61 implants in the posterior maxillary region were retrospectively included in the study. Twenty-four patients were diagnosed with peri-implantitis (PI) and 21 had peri-implant health (PH). Cone-beam computed tomography (CBCT) scans were evaluated to assess maxillary sinus characteristics, including membrane thickening, sinus occupancy and ostium patency. The CBCT scans taken 6 months after intervention aimed at arresting disease (implant removal or treatment of PI) in the PI group were also appraised and compared to baseline scans.
RESULTS
At baseline, all parameters evaluating membrane thickness disorders yielded significant differences between groups (p < .001). Patients with posterior maxillary implants diagnosed with PI were 7× more likely to present membrane thickening compatible with pathology when compared to patients with healthy implants (OR = 7.14; p = .005). Furthermore, the likelihood was 6x greater in implants diagnosed with PI to exhibit moderate membrane thickening (OR = 6.75, p = .001). The patients receiving interventions aimed at arresting PI experienced significant enhancement in all radiographic parameters related to the sinus cavity at the 6-month follow-up (p < .001), though these variations were similarly independent of whether treatment consisted of PI treatment or implant removal.
CONCLUSIONS
Maxillary sinus membrane thickening and the permeability/obstruction of the ostium are frequently associated with the presence of PI in posterior implants. Interventions targeting disease resolution effectively reduce membrane thickness to levels compatible with maxillary sinus health
Cuerda tendinosa auricular aberrante. Una causa infrecuente de prolapso mitral
Aberrant tendinous chordae at the atrial level are exceptional findings. We present a case of aberrant chordae between the free wall of the left atrium and the posterior mitral valve with mild/moderate regurgitation. This case is an example of the usefulness of three-dimensional echocardiography in the mitral regurgitation assessment, allowing the precise anatomical and functional characterization of the aberrant chordae.La presencia de cuerdas tendinosas aberrantes a nivel auricular es un hallazgo muy poco frecuente y suele asociarse a regurgitación mitral. Se presenta el caso de una cuerda aberrante que se inserta en la pared libre de la aurícula izquierda y en el velo mitral posterior, y que condiciona una regurgitación ligera/moderada. Es un ejemplo claro de la utilidad de la ecocardiografía tridimensional en la valoración de la etiopatogenia de la regurgitación mitral, permitiendo en este caso la precisa caracterización anatómica y funcional de la cuerda aberrante
La muerte súbita en el deporte. Registro en el Estado español
Introducción y objetivos: Este trabajo investiga las causas de muerte súbita en España recogidas a través del Registro Nacional de Muerte Accidental y Súbita en Deportistas. Métodos: Estudio retrospectivo y prospectivo de 180 casos de muerte desde el año 1995 hasta la fecha actual. Resultados: Ciento ochenta casos de muerte súbita: 164 varones, 12 mujeres (4 no determinados). Deportes: fútbol (40), ciclismo (39), atletismo (24), fútbol sala y deportes de frontón (8 cada uno) y educación física (7). Las causas más frecuentes han sido: enfermedad ateromatosa coronaria (48), la miocardiopatía arritmogénica (11), la miocardiopatía hipertrófica (9), las anomalías coronarias congénitas (5), la hipertrofia ventricular izquierda idiopática (4) y la estenosis valvular aórtica (4). En mayores de 30 años (96): enfermedadb ateromatosa coronaria (73,43%), miocardiopatía arritmogénica (6,25%) y miocardiopatía hipertrófica (4,68%). En los fallecidos de 30 años o menos (84): miocardiopatía arritmogénica (13,72%), la miocardiopatía hipertrófica (11,76%), anomalías coronarias congénitas (9,8%), la hipertrofia ventricular izquierda idiopática (7,84%) y estenosis valvular aórtica (5,88%). En estas edades la mayoría de las muertes fueron de origen indeterminado (27,45%). Conclusiones: Dificultad para obtener datos completos de muerte súbita en deportistas en nuestro país, que muestran una importante incidencia en jóvenes y en adultos de la quinta década. Los deportes más implicados son fútbol, ciclismo y atletismo. Causa más frecuente en mayores de 30 años: enfermedad ateromatosa coronaria, y en menores de 30 años: la muerte inexplicada en corazón estructuralmente normal es lo más frecuente. Es necesario profundizar en la obtención de los datos de las muertes súbitas en deportistas a través de este registro
La mort sobtada en l'esport. Registre a l'Estat espanyol
Introducció i objectius: Aquest treball investiga las causes de mort sobtada a Espanya recollides mitjançant el Registre Nacional de Mort Accidental y Sobtada en Esportistes.
Mètodes: S'apleguen 180 casos de mort sobtada: 164 homes, 12 dones y 4 en què no s'havia especificat el sexe; 84 casos van correspondre a menors de 30 anys.
Resultats: Els esports més practicats en el moment de l'episodi mortal han estat el futbol (40 casos), el ciclisme (39), l'atletisme (24), el futbol sala y els esports de frontó (8 casos cada u) y l'educació física (7). Las causes més freqüents de mort sobtada han estat la malaltia ateromatosa coronària (48 casos), la miocardiopatia aritmogènica (11), la miocardiopatia hipertròfica (9), les anomalies coronàries congènites (5), la hipertròfia ventricular esquerra idiopàtica (4) y l'estenosi valvular aòrtica (4). En majors de 30 anys la causa més freqüent de mort és la malaltia ateromatosa coronària, amb 47 dels 64 casos estudiats (73,43%). Hi ha 4 casos de miocardiopatia aritmogénica (6,25%) y 3 casos (4,68%) de miocardiopatia hipertròfica. En els morts de 30 anys o menys les causes més freqüents foren la miocardiopatia aritmogènica (7 casos, 13,72%), la miocardiopatia hipertròfica (6 casos, 11,76%), les anomalies coronàries congènites (5 casos, 9,8%), la hipertròfia ventricular esquerra idiopàtica (4 casos, 7,84%) i l'estenosi valvular aòrtica (3 casos, 5,88%). En aquestes edats la majoria de les morts foren d'origen indeterminat (14 casos, 27,45%) a pesar de haver practicat necròpsia completa.
Conclusions: Hi ha una gran dificultat per obtenir dades completes dels casos de mort sobtada en esportistes al nostre país, que mostren una important incidència en joves y en adults de la cinquena dècada. Els esports més freqüentment implicats són el futbol, el ciclisme y l'atletisme. La causa més freqüent de mort sobtada a partir dels 30 anys és la malaltia ateromatosa coronària, y en menors de 30 anys, la miocardiopatia aritmogènica, la miocardiopatia hipertròfica, les anomalies coronàries congènites y la hipertròfia ventricular esquerra idiopàtica, però la de major incidència es la mort inexplicada amb cor estructuralment normal. Es necessari profunditzar en l'obtenció de les dates de les morts sobtades en esportistes mitjançant aquest registre
The choice of not being discrete : discussing the use of discrete continuous models in freight transport
O transporte de carga tem u+lizado os modelos herdados do transporte de passageiros e com eles todos seus pressupostos tradicionais. Mas são todos eles válidos? O presente ar+go visa discu+r sobre um dos pressupostos menos contestados neste processo de modelagem: o da exclusividade mútua das alterna+vas no contexto do transporte de carga. Para isso, este ar+go apresenta uma aplicação de Mul ple Discrete Extreme Value Model (MDCEV) para a escolha de modo e porto para os consolidadores de grãos na Argen+na. O modelo é desenvolvido a par+r de uma pesquisa de Preferência Declarada que permi+a a escolha de mais de uma alterna+va simultaneamente. A escolha é descrita pelo Tempo de Viagem, Tempo de Espera do Serviço, Preço de venda no porto e Custo do Frete. O MDCEV permi+u obter informação sobre o efeito da saciedade das diferentes alterna+vas. De esta maneira, o MDCEV pode ser uma ferramenta valiosa para a modelagem de escolhas tá+cas e estratégicas.Freight transport has historically inherited the passage transport framework and model assump+ons. But, are all of them valid? This paper discusses one of the least discussed assump+ons: the mutual exclusiveness of alterna+ves in the freight context. To do so, a Mul+ple Discrete Extreme Value Model (MDCEV) has been used to describe the behavior of grain consolidators with data from a stated preference survey that allowed mul+- ple alterna+ves to be chosen simultaneously. The choice is described by the Travel Time, Lead Time, Price paid in the port and Freight Price. The MDCEV gave insights regarding the sa+a+on behavior of the grain consolidators. This way, the MDCEV can become a valuable tool for modeling tac+cal and strategic choices
Ecocardiografía tridimensional transesofágica en la evaluación del septo interauricular
Transesophageal 3D-echocardiography allows a detailed anatomical observation of the interatrial septum, inclu- ding the remnants of the fetal circulation: the fossa ovalis and the foramen ovale. More than 25% of normal adults present a patent foramen ovale, which under some circumstances may have pathologic relevance. Moreover, most of the structural interventions in the left heart require transseptal crossing of the interatrial septum through the fossa ovalis. Therefore, an adequate knowledge of the anatomical features of the interatrial septum, as well as its normal and pathologic variants is definitely required.La ecocardiografía tridimensional transesofágica ha revolucionado la forma en que se observa hoy día el tabique interauricular, permitiendo una visión anatómica (no accesible previamente) de los remanentes de la circulación fetal: fosa oval y foramen oval. Más de un 25% de la población presenta un foramen oval permeable, que ocasionalmente puede tener relevancia clínica. Además, gran parte de los procedimientos de intervencionismo estructural se llevan a cabo por vía transeptal tras la punción de la fosa oval. Por tanto, actualmente resulta necesario tener un adecuado conocimiento de la anatomía del septo interauricular, así como de sus variantes normales y patológicas.
Discrepancies in the diagnosis of intraductal proliferative lesions of the breast and its management implications: results of a multinational survey
To measure discrepancies in diagnoses and recommendations impacting management of proliferative lesions of the breast, a questionnaire of five problem scenarios was distributed among over 300 practicing pathologists. Of the 230 respondents, 56.5% considered a partial cribriform proliferation within a duct adjacent to unequivocal ductal carcinoma in situ (DCIS) as atypical ductal hyperplasia (ADH), 37.7% of whom recommended reexcision if it were at a resection margin. Of the 43.5% who diagnosed the partially involved duct as DCIS, 28.0% would not recommend reexcision if the lesion were at a margin. When only five ducts had a partial cribriform proliferation, 35.7% considered it as DCIS, while if ≥20 ducts were so involved, this figure rose to 60.4%. When one duct with a complete cribriform pattern measured 0.5, 1.5, or 4 mm, a diagnosis of DCIS was made by 22.6, 31.3, and 94.8%, respectively. When multiple ducts with flat epithelial atypia were at a margin, 20.9% recommended reexcision. Much of these discrepancies arise from the artificial separation of ADH and low-grade DCIS and emphasize the need for combining these two under the umbrella designation of ductal intraepithelial neoplasia grade 1 (DIN 1) to diminish the impact of different terminologies applied to biologically similar lesions
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