Primer registro de hospedador para el parasitoide oófilo, Polynema haitianum (Hymenoptera: Mymaridae), con descripción del macho y redescripción de la hembra

El presente trabajo científico provee la primera asociación hospedador - parasitoide y amplía la distribución geográfica para el parasitoide Polynema haitianum Dozier (Hymenoptera: Mymaridae) a varios paises de Sudamérica, previamente conocido para Haití. Además se describió el macho y se redescribio la hembra. En este trabajo se obtuvo una especie de parasitoides de huevos, Polynema haitianum, la cual se desarrolla en huevos de Xerophloea viridis (Hemiptera: Cicadellidae). Con el registro de P. haitianum se eleva a tres el número de las especies de parasitoides que atacan a la chicharrita X. viridis, en Argentina.Fil: Luft Albarracin, Erica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Planta Piloto de Procesos Industriales Microbiologicos; ArgentinaFil: Aquino, Daniel A.. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentin

A Maximum Likelihood Approach to Extract Polylines from 2-D Laser Range Scans

Man-made environments such as households, offices, or factory floors are typically composed of linear structures. Accordingly, polylines are a natural way to accurately represent their geometry. In this paper, we propose a novel probabilistic method to extract polylines from raw 2-D laser range scans. The key idea of our approach is to determine a set of polylines that maximizes the likelihood of a given scan. In extensive experiments carried out on publicly available real-world datasets and on simulated laser scans, we demonstrate that our method substantially outperforms existing state-of-the-art approaches in terms of accuracy, while showing comparable computational requirements. Our implementation is available under https://github.com/acschaefer/ple.Comment: 9 page

Long-Term Urban Vehicle Localization Using Pole Landmarks Extracted from 3-D Lidar Scans

Due to their ubiquity and long-term stability, pole-like objects are well suited to serve as landmarks for vehicle localization in urban environments. In this work, we present a complete mapping and long-term localization system based on pole landmarks extracted from 3-D lidar data. Our approach features a novel pole detector, a mapping module, and an online localization module, each of which are described in detail, and for which we provide an open-source implementation at www.github.com/acschaefer/polex. In extensive experiments, we demonstrate that our method improves on the state of the art with respect to long-term reliability and accuracy: First, we prove reliability by tasking the system with localizing a mobile robot over the course of 15~months in an urban area based on an initial map, confronting it with constantly varying routes, differing weather conditions, seasonal changes, and construction sites. Second, we show that the proposed approach clearly outperforms a recently published method in terms of accuracy.Comment: 9 page

First known host record for the egg parasitoid Polynema haitianum (Hymenoptera: Mymaridae), with description of the male and redescription of the female

La presente contribución provee la primera asociación hospedador – parasitoide y amplía la distribución geográfica para Polynema haitianum Dozier, previamente conocida para Haití. Además se describe el macho y se redescribe la hembra.This contribution provides the first parasitoid – host association and new geographical records for Polynema haitianum Dozier, previously known from Haiti. In addition, the male is described and the female is redescribed.Facultad de Ciencias Naturales y Muse

First known host record for the egg parasitoid Polynema haitianum (Hymenoptera: Mymaridae), with description of the male and redescription of the female

La presente contribución provee la primera asociación hospedador – parasitoide y amplía la distribución geográfica para Polynema haitianum Dozier, previamente conocida para Haití. Además se describe el macho y se redescribe la hembra.This contribution provides the first parasitoid – host association and new geographical records for Polynema haitianum Dozier, previously known from Haiti. In addition, the male is described and the female is redescribed.Facultad de Ciencias Naturales y Muse

First known host record for the egg parasitoid Polynema haitianum (Hymenoptera: Mymaridae), with description of the male and redescription of the female

La presente contribución provee la primera asociación hospedador – parasitoide y amplía la distribución geográfica para Polynema haitianum Dozier, previamente conocida para Haití. Además se describe el macho y se redescribe la hembra.This contribution provides the first parasitoid – host association and new geographical records for Polynema haitianum Dozier, previously known from Haiti. In addition, the male is described and the female is redescribed.Facultad de Ciencias Naturales y Muse

Adults with probable Developmental Coordination Disorder selectively process early visual, but not tactile information during action preparation. An electrophysiological study.

Developmental coordination disorder (DCD) is a neurodevelopmental condition affecting motor coordination in children and adults. Here, EEG signals elicited by visual and tactile stimuli were recorded while adult participants with and without probable DCD (pDCD) performed a motor task. The task cued reaching movements towards a location in visible peripersonal space as well as an area of unseen personal space. Event-related potentials elicited by visual and tactile stimuli revealed that visual processing was strongly affected by movement preparation in the pDCD group, even more than in controls. However, in contrast to the controls, tactile processing in unseen space was unaffected by movement preparation in the pDCD group. The selective use of sensory information from vision and proprioception is fundamental for the adaptive control of movements, and these findings suggest that this is impaired in DCD. Additionally, the pDCD group showed attenuated motor rhythms (beta: 13-30Hz) over sensorimotor regions following cues to prepare movements towards unseen personal space. The results reveal that individuals with pDCD exhibit differences in the neural mechanisms of spatial selection and action preparation compared to controls, which may underpin the sustained difficulties they experience. These findings provide new insights into the neural mechanisms potentially disrupted in this highly prevalent disorder

Sympathetic activity and early mobilization in patients in intensive and intermediate care with severe brain injuries: a preliminary prospective randomized study.

Patients who experience severe brain injuries are at risk of secondary brain damage, because of delayed vasospasm and edema. Traditionally, many of these patients are kept on prolonged bed rest in order to maintain adequate cerebral blood flow, especially in the case of subarachnoid hemorrhage. On the other hand, prolonged bed rest carries important morbidity. There may be a clinical benefit in early mobilization and our hypothesis is that early gradual mobilization is safe in these patients. The aim of this study was to observe and quantify the changes in sympathetic activity, mainly related to stress, and blood pressure in gradual postural changes by the verticalization robot (Erigo®) and after training by a lower body ergometer (MOTOmed-letto®), after prolonged bed rest of minimum 7 days. Thirty patients with severe neurological injuries were randomized into 3 groups with different protocols of mobilization: Standard, MOTOmed-letto® or Erigo® protocol. We measured plasma catecholamines, metanephrines and blood pressure before, during and after mobilization. Blood pressure does not show any significant difference between the 3 groups. The analysis of the catecholamines suggests a significant increase in catecholamine production during Standard mobilization with physiotherapists and with MOTOmed-letto® and no changes with Erigo®. This preliminary prospective randomized study shows that the mobilization of patients with severe brain injuries by means of Erigo® does not increase the production of catecholamines. It means that Erigo® is a well-tolerated method of mobilization and can be considered a safe system of early mobilization of these patients. Further studies are required to validate our conclusions. The study was registered in the ISRCTN registry with the trial registration number ISRCTN56402432 . Date of registration: 08.03.2016. Retrospectively registered