bluuebunny/crossref_metadata_2025 huggingface dataset:
A case of congenital Rett variant in a Chinese patient caused by a
FOXG1
mutation
Authors: Niu Yan , Cao Lirong , Zhao Peng , Cai Chunquan
Published: August 2020

Rett syndrome (RTT) is a severe progressive neurodevelopmental disease characterized by psychomotor regression. The
FOXG1
gene is one of the pathogenic genes associated with the congenital Rett variant, which is less studied. Only a few Chinese patients with
FOXG1
mutation have been reported. In this study, we describe a Chinese female patient with congenital Rett variant who presented with psycho-motor retardation, developmental regression, microcephaly, seizure, stereotypic hand movement and hypotonia. Targeted high-throughput sequencing was conducted, and a heterozygous
FOXG1
mutation [NM_005249.4: c.506dupG (P.G169Gfs* 286)] was identified. It was a frameshift mutation resulting in alteration of the reading frames downstream of the mutation.

SIMILAR CASES PUBLISHED:

10.

CONFLICT OF INTEREST:

None.
LIDAR AND PHOTOGRAMMETRIC DATASETS INTEGRATION USING SUB-BLOCK OF IMAGES
Authors: Mitishita E. , Costa F. , Centeno J.
Published: August 2020

Abstract. Imagery and Lidar datasets have been used frequently to extract geoinformation. Datasets in the same mapping or geodetic frame is a fundamental condition for this application. Nowadays, Direct Sensor Orientation (DSO) can be considered as a mandatory technology to be used in the aerial photogrammetric survey. Although the DSO provides a high degree of automation process due to the GNSS/INS technologies, the accuracies of the obtained results from the imagery and Lidar surveys are dependent on the quality of a group of parameters that models accurately the user conditions of the system at the moment the job is performed. This paper shows the study that was performed to improve the tridimensional accuracies of the aerial imagery and Lidar datasets integration using the 3D photogrammetric intersection of single models (pairs of images) with Exterior Orientation Parameters (EOP) estimated from DSO. A Bundle Adjustment with additional parameters (BBA) of a small sub-block of images is used to refine the Interior Orientation Parameters (IOP) and EOP in the job condition. In the 3D photogrammetric intersection experiments using the proposed approach, the horizontal and vertical accuracies, estimated by the Root Mean Square Error (RMSE) of the 3D discrepancies from the Lidar checkpoints, increased around of 25% and 75% respectively.
3D ONLINE TERRAIN MAPPING WITH SCANNING RADAR SENSORS
Authors: Weidinger C. , Kadiofsky T. , Glira P. , Zinner C. , Kubinger W.
Published: August 2020

Abstract. Environmental perception is one of the core requirements in autonomous vehicle navigation. If exposed to harsh conditions, commonly deployed sensors like cameras or lidars deliver poor sensing performance. Millimeter wave radars enable robust sensing of the environment, but suffer from specular reflections and large beamwidths. To incorporate the sensor noise and lateral uncertainty, a new probabilistic, voxel-based recursive mapping method is presented to enable online terrain mapping using scanning radar sensors. For map accuracy evaluation, test measurements are performed with a scanning radar sensor in an off-road area. The voxel map is used to derive a digital terrain model, which can be compared with ground-truth data from an image-based photogrammetric reconstruction of the terrain. The method evaluation shows promising results for terrain mapping solely performed with radar scanners. However, small terrain structures still pose a problem due to larger beamwidths in comparison to lidar sensors.
INFLUENCE OF IMAGE INTERPOLATION ON IMAGERY-BASED DETECTION AND COMPENSATION OF SATELLITE JITTER
Authors: Ye Z. , Xu Y. , Wei C. , Tong X. , Stilla U.
Published: August 2020

Abstract. Satellite jitter is a common and complicated phenomenon that degrades the geometric quality of high-resolution satellite images. Imagery-based detection and compensation of satellite jitter have recently been widely concerned. However, most of the existing studies overlook the issue of image interpolation in this topic involving subpixel measurements. In this study, the influence of image interpolation on imagery-based detection and compensation of satellite jitter is investigated. Four different interpolators are separately applied in dense least squares matching for jitter detection based on parallax observation and in intensity resampling for jitter distortion compensation. Experiments were carried out using ZiYuan-3 dataset to compare and analyze the results in the case of different image interpolation. The experimental results demonstrate the influence of image interpolation on imagery-based jitter processing. Inferior interpolators can induce pixel locking effect in subpixel matching and position-dependent systematic bias after image correction, which deteriorate the performance of jitter detection and compensation. To ensure the reliability, sophisticated interpolation algorithms with smaller phase errors are preferable in imagery-based jitter detection and compensation.
APPROACHES FOR MAPPING NIGHT-TIME ROAD ENVIRONMENT LIGHTING CONDITIONS
Authors: Vaaja M.T. , Maksimainen M. , Kurkela M. , Virtanen J.-P. , Rantanen T. , Hyyppä H.
Published: August 2020

Abstract. The integration of the 3D measurement techniques with luminance imaging has increased the potential for mapping night-time road lighting conditions. In this study, we present selected static and mobile approaches for the purpose. The measurement methods include conventional 2D imaging luminance photometry and the integration of the luminance imaging with terrestrial and mobile laser scanning. In addition, we present our initial experiences with performing integrated luminance mapping and photogrammetric reconstruction from drone imagery. All of the presented methods require that the camera is calibrated with a reference luminance source. Our results show the results of luminance calibration and feasibility of 3D luminance point clouds for evaluating road surface luminances. In addition, we discuss the other potential applications, limitations and future research.
ON-ROAD INFORMATION EXTRACTION FROM LIDAR DATA VIA MULTIPLE FEATURE MAPS
Authors: Wu H. , Xie Z. , Wen C. , Wang C. , Li J.
Published: August 2020

Abstract. On-road information, including road boundaries, road markings, and road cracks, provides significant guidance or warning to all road users. Recently, the on-road information extraction from LiDAR data have been widely studied. However, for the LiDAR data with lower accuracy and higher noise, some detailed information, such as road boundary, is difficult to be extracted correctly. Furthermore, most of previous studies lack an exploration of efficiently extracting multiple on-road information from a single framework. In this paper, we propose a new framework that can simultaneously extract multiple on-road information from high accuracy LiDAR data and can also more robustly extract detailed road boundaries from low accuracy LiDAR data. First, we propose a Curb-Aware Ground Filter to extract ground points with rich curb structure features. Second, we transform the vertical density, elevation gradient and intensity features of the ground points into multiple feature maps and extract multiple on-road information from the feature maps by employing a semantic segmentation network. Experimental results on three datasets with different data accuracy demonstrate that our method outperforms other recent competitive methods.
STATUS OF THE IMAGING SPECTROSCOPY MISSION ENMAP WITH RADIOMETRIC CALIBRATION AND CORRECTION
Authors: Storch T. , Honold H.-P. , Alonso K. , Pato M. , Mücke M. , Basili P. , Chabrillat S. , Fischer S.
Published: August 2020

Abstract. The high-resolution imaging spectroscopy remote sensing mission EnMAP (Environmental Mapping and Analysis Program, enmap.org) covers the spectral range from 420 nm to 2450 nm with a spectral sampling distance varying between 4.8 nm and 12.0 nm comprising 262 spectral bands. We focus on the planned framework concerning radiometry. The expected signal-to-noise ratio at reference radiance level is 500:1 at 495 nm and 150:1 at 2200 nm. The radiometric resolution is 14 bits and an absolute radiometric accuracy of better than 5% is achieved. Radiometric calibration is based on Sun calibration measurements with a fullaperture diffusor for absolute calibration. In addition, relative calibration monitors the instrument during the complete mission lifetime based on an integrating sphere (on the satellite). The fully-automatic on-ground image processing chain considers the derived radiometric calibration coefficients in the radiometric correction which is followed by the orthorectification and atmospheric compensation. Each of the two 2-dimensional detector arrays of the prism-based pushbroom dual-spectrometer works in a dual-gain configuration to cover the complete dynamic range. EnMAP will acquire 30 km in the across-track direction with a ground sampling distance of 30 m and the across-track tilt capability of 30° will enable a target revisit time of less than 4 days. The launch is scheduled for 2021. The high-quality products will be freely available to international scientific users for measuring and analysing diagnostic parameters which describe vital processes on the Earth’s surface.
GENERIC LINEAR ARRAY SCANNER MODELING OF SPECTRAL IMAGING SYSTEMS CONTAINING LIMITED METADATA
Authors: Theiss H. J.
Published: August 2020

Abstract. The National Geospatial-Intelligence Agency (NGA) designed the Generic Linear Array Scanner (GLAS) model for geopositioning images from both airborne and spaceborne linear array scanning systems, including pushbroom, whiskbroom, and panoramic sensors. Providers of hyperspectral imagery (HSI) historically have not populated products with high fidelity metadata to support downstream photogrammetric processing. To demonstrate recommended metadata population and exploitation using the GLAS model, NGA has generated example HSI products using data collected by NASA’s EO-1 Hyperion sensor and provided courtesy of the U.S. Geological Survey. This paper provides novel techniques for: 1) generating reasonably accurate initial approximations for GLAS metadata as a function of per-image metadata consisting of only timing information and the latitude and longitude values of the four corners of the image; and 2) identifying a vector of adjustable parameters and reasonable values for its a priori error covariance matrix that enable corrections to the metadata during a bundle adjustment. The paper describes applying these techniques to fourteen overlapping Hyperion images of the Alps, running a bundle adjustment as a function of tie points and optional ground control points, and demonstrating superior results to the previous polynomial based approach as quantified by the 3D errors at several ground check points.
Preface: Technical Commission I
Authors: Hinz S. , Feitosa R. Q. , Weinmann M. , Jutzi B.
Published: August 2020

Abstract. For ISPRS Technical Commission I (TC I), a remarkable number of 189 submissionsfor the 2020 Congress edition of ISPRS Annals and ISPRS Archives was received.This included both full paper and abstract submissions from all over the world.Encouraged by the success of double blind paper reviewing in preparation of the2016 Prague congress and the 2018 Karlsruhe symposium, also this time, TC Iorganized a strict peer-reviewing process. This included double-blind reviewing forfull papers as well as a two-stage evaluation of abstract submissions – first stagebased on the submitted abstracts (“conditional acceptance“), and second stage after submission of the respective final papers.In total, we received 69 full paper submissions and 120 abstract submissions, whichindicates a nice trend towards full paper submissions compared to previous TC Ievents.45 full papers passed the double-blind peer-review process and were accepted forpublication in the ISPRS Annals (acceptance rate 64%); usually, three or four reviewswere obtained for each paper. Abstract submissions and their respective final paperswere reviewed by a team of professionals. In total, 76 papers were accepted to theISPRS Archives.The manuscripts in both the ISPRS Annals and Archives cover a broad range oftopics related to remote sensing platforms, technologies, systems and relatedmethods and reflect the current trends in algorithmic research and developments insensing and data acquisition methods. Noteworthy is that numerous contributionswere submitted to Intercommission WGs of TC I with TC II and TC IV, whichunderlines the increasing trend towards an integral approach to sensors, systemsand methods in photogrammetry, remote sensing and mobile mapping.
FRACTAL DIMENSION BASED SUPERVISED LEARNING FOR WOOD AND LEAF CLASSIFICATION FROM TERRESTRIAL LIDAR POINT CLOUDS
Authors: Hui Z. , Xia Y. , Nie Y. , Chang Y. , Hu H. , Li N. , He Y.
Published: August 2020

Abstract. Terrestrial Laser scanner has been widely used in the field of forestry. Wood-leaf separation is the fundamental step to most applications of forestry. This paper presented a robust supervised learning method for wood and leaf classification by developing four new feature vectors. Fractal dimension is first calculated to indicate the difference of regularity or roughness between wood and leaf. Zenith angle and variation are presented to distinguish trunks or branches from leaves. The adaptive axis direction of cylinder is adopted to calculate the local point density precisely. Experimental results show that the supervised learning method using the four feature vectors presented in this paper can achieve a good classification performance. Both accuracy and F1 score are higher than the ones of the method using eigen value based feature vectors.
OPACITY-BASED EDGE HIGHLIGHTING FOR TRANSPARENT VISUALIZATION OF 3D SCANNED POINT CLOUDS
Authors: Kawakami K. , Hasegawa K. , Li L. , Nagata H. , Adachi M. , Yamaguchi H. , Thufail F. I. , Riyanto S. ,   Brahmantara, Tanaka S.
Published: August 2020

Abstract. The recent development of 3D scanning technologies has made it possible to quickly and accurately record various 3D objects in the real world. The 3D scanned data take the form of large-scale point clouds, which describe complex 3D structures of the target objects and the surrounding scenes. The complexity becomes significant in cases that a scanned object has internal 3D structures, and the acquired point cloud is created by merging the scanning results of both the interior and surface shapes. To observe the whole 3D structure of such complex point-based objects, the point-based transparent visualization, which we recently proposed, is useful because we can observe the internal 3D structures as well as the surface shapes based on high-quality see-through 3D images. However, transparent visualization sometimes shows us too much information so that the generated images become confusing. To address this problem, in this paper, we propose to combine “edge highlighting” with transparent visualization. This combination makes the created see-through images quite understandable because we can highlight the 3D edges of visualized shapes as high-curvature areas. In addition, to make the combination more effective, we propose a new edge highlighting method applicable to 3D scanned point clouds. We call the method “opacity-based edge highlighting,” which appropriately utilizes the effect of transparency to make the 3D edge regions look clearer. The proposed method works well for both sharp (high-curvature) and soft (low-curvature) 3D edges. We show several experiments that demonstrate our method’s effectiveness by using real 3D scanned point clouds.
EFEITOS MICROCLIMÁTICOS DE UM FRAGMENTO DE FLORESTA URBANA EM CURITIBA-PR
Authors: Raymundo Eduardo Praxedes Bomfim , Biondi Daniela , Dacól Fernando Vicente , Leal Mauricio Da Silva , Reksidler Kelvyn
Published: August 2020

A urbanização limitou demasiadamente os remanescentes vegetais, aumentando a importância dos fragmentos florestais na atenuação do microclima local. Objetivou-se analisar a influência microclimática de um fragmento de floresta urbana (Capão do Tigre, localizado no campus III - Jardim Botânico da Universidade Federal do Paraná) em todas as estações do ano. Foram obtidos dados de velocidade do vento, temperatura do ar e umidade relativa do ar. Para isso, foi utilizado três miniestações micrometeorológicas portáteis da marca Kestrel®, modelo 4.200, duas permaneceram estáticas no centro e na borda florestal, e a outra fez o percurso de 6 pontos distribuídos ao longo do estacionamento, no período entre 11h e 14h30, simultaneamente, pois este período cobre a faixa de maior incidência de radiação e consequentemente maior temperatura. As médias das variáveis observadas diferenciaram significativamente em todas as estações do ano. As mudanças mais acentuadas nas variáveis meteorológicas foram encontradas entre o centro do fragmento florestal e a área do estacionamento, sendo a borda do fragmento o local onde as médias se apresentaram intermediárias aos demais lugares. Conclui-se que o fragmento florestal exerce influência no microclima local (temperatura, umidade do ar e velocidade do vento), em todas as estações do ano.
Enhancing widening participation evaluation through the development of a selfassessment tool for practitioners: learning from the OfS project Standards of Evaluation Practice (Phase 2) 2017–2019
Authors: Mountford-Zimdars Anna , Moore Joanne , Shiner Richard
Published: August 2020

The ultimate goal of widening participation work, which unites policymakers, practitioners and academics, is to enhance the experience of disadvantaged students relating to HE access, success and outcomes. This article presents the Office for Students' (OfS) commissioned project Standards
of Evaluation Practice (Phase 2). This project sought to create a step-change in robustness of evidence used and evaluation practices. Our 2017 – 19 project explored evaluation practices among nine partner organisations drawn from higher education providers (HEPs) and third-sector
partners. The initial aim was to pilot test the Standards of Evidence of Evaluation developed during Phase 1 research; share practices that work and highlight examples of best practice. As the project developed, a further outcome was envisaged through ongoing discussions between the OfS, academics,
HEPs and third-sector parties: a self-assessment tool for evaluation practitioners. This tool provides a framework and guidance which allow practitioners to map their own evaluation approaches. Through using prompts, the five dimensions of the tool highlight strengths and weaknesses of evaluation
within five domains (strategic context, programme design, evaluation design, evaluation implementation and learning). This new tool is, in effect, a five-point framework setting guidance about good evaluation practice. It was rolled out to all HEPs in spring 2019, when providers were invited
to return the completed tool and their reflection as part of their access and participation planning.
Das Verbot des Kopftuchs bei Schülerinnen im Spannungsfeld von Elternrecht, Kinderrechten und staatlicher Erziehung
Authors: Hecker Wolfgang
Published: August 2020

Der Beitrag setzt sich mit der Frage der Zulässigkeit eines Verbots des Kopftuchs bei Schülerinnen auseinander. Behandelt wird die Bedeutung des Elternrechts, des Selbstbestimmungsrechts von Schülerinnen sowie der staatlichen Erziehungsziele in der Schule für die Fragestellung.
Chinesische Staatsunternehmen – Eine Herausforderung für das europäische Wettbewerbsrecht?
Authors: Trapp Patricia
Published: August 2020

Wenige wettbewerbsrechtliche Problemstellungen haben in der letzten Zeit so viel Aufmerksamkeit auch außerhalb der Fachmedien hervorgerufen wie die Frage nach der Behandlung Chinas bzw. chinesischer Unternehmen unter den Regularien des Wettbewerbsrechts der Europäischen Union. Prominentestes Beispiel hierfür sind sicherlich die Rufe nach einer Reform der Europäischen Fusionskontrolle, die seit der Untersagung des Zusammenschlusses der Unternehmen Siemens und Alstom durch die Europäische Kommission zunehmend lauter geworden sind. Während hier die Berücksichtigung zunehmender Konkurrenz aus Fernost im Rahmen der Zusammenschlusskontrolle im Vordergrund steht, stellt insbesondere auch die wettbewerbsrechtliche Beurteilung von Tätigkeiten chinesischer Staatsunternehmen auf dem Binnenmarkt das Unionsrecht vor Herausforderungen. Der folgende Beitrag beschäftigt sich daher schwerpunktmäßig mit Zusammenschlüssen unter Beteiligung chinesischer Staatsunternehmen und deren Zulässigkeit nach dem Fusionskontrollrecht, bevor die aktuellen Bestrebungen zur Reform des europäischen Wettbewerbsrechts seit der Entscheidung der Kommission im Fall Siemens/Alstom präsentiert werden.
A Comparison of Quality of Life and Happiness of Children and Adolescents in Residential Care with Children and Adolescents in Parental Care of Ahvaz in 2015
Authors: Khormehr Maryam , Abdolahi Shahvali Elham , Ziaeirad Marzieh , Honarmandpour Azam
Published: August 2020

: Although living in a children’s home provides physical security, nutrition, and shelter, it may lack psychological security. Therefore, attention needs to be focused on the quality of life of children and adolescents living in children’s homes. This descriptive-analytic study was conducted from April to January 2015 to compare the quality of life and happiness in adolescents and children in residential care and those in parental care in Ahvaz. This study, using an available multi-stage random sampling method, was performed on 150 children and adolescents aged 18 - 8 years old, the information of 75 children available in residential care, and 75 children and adolescents in parental care were gathered. The result showed the mean quality of life scores and happiness in children and adolescents in residential care (80.8 ± 9.08, 67.05 ± 13.59) was significantly lower than the mean score quality of life and the happiness of children and adolescents in parental care (103.61 ± 8.88, 83.24 ± 15.92) (P < 0.0001). Children and adolescents in residential care had a lower quality of life and happiness than children and adolescents in parental care.
CT Imaging Features During Disease Progression of 2019 Novel Coronavirus (COVID-19) Pneumonia
Authors: Yu Nan , Yu Yong , Cai Shubo , Shen Cong , Guo Youmin
Published: August 2020

Objectives: To describe the characteristics of computed tomography (CT) in patients with 2019 novel coronavirus (COVID-19) pneumonia and their changes during disease progression. Patients and Methods: A total of 96 chest CT scans of 61 pneumonia patients associated with COVID-19 were reviewed to identify CT features associated with the time of symptom onset and the evolution of disease. Results: The initial CTs of 61 patients were obtained during 1 to 11 days after the onset. The main CT pattern of initial CT obtained during 1 - 3 days after the symptom onset was single (7/23, 35%) or multiple ground-glass opacity (GGO, 8/23, 35%). At 4 - 7 days after the symptom onset, the main imaging features were crazy paving GGO mixed with partial consolidation pattern (15/32, 47%). At 8 - 11 days after the symptom onset, the CT images showed consolidation pattern (3/6, 50%). A total of 35 follow up CTs were collected. The mean interval time between each follow up CT was 3 ± 2 days. The CT patterns also changed with the evolution of the disease: the features of GGO manifested at the early stage (1 - 3d). The crazy paving GGO pattern, consolidation pattern and mixed with partial consolidation pattern were found 4 to 14 days after the onset. In the absorption stage (15 - 24d), both density and extent of lesions were reduced. Conclusion: The CT imaging features are associated with the time of symptom onset and evolution of disease. Understanding the imaging characteristics of each stage is very helpful for understanding the development of disease.
Evolución filogenética de la bipedestación desde la biomecánica
Authors: Isidro Albert
Published: August 2020

La Bipedestación (BP) apareció hace más de 3,5 millones

de años entre los periodos Plioceno Inferior y

Mioceno, en algún representante del grupo de los

Homínidos o tal vez algún Hominoide; pero con toda

probabilidad relacionado con Austrolopithecus afarensis.

Se estudian en éste trabajo las diversas hipótesis que

tratarían de explicar el porqué de la aparición de éste

cambio locomotor. Hipótesis de tipo Bioclimático,

Hipótesis de Rol, tanto sociales como reproductivas;

Hipótesis Posturales e Hipótesis Bioenergéticas.

Se avanza una posible Cronofilogenia de la

Bipedestación, a partir del Oligoceno, con la cadena

evolutiva compuesta por Propliopithecidae,

Proconsulidae, Kenyapithecus, Austrolopithecidae y

Homínidae.

Se citan los tipo de locomoción preadaptadores a la

BP, extrapolando estudios realizados sobre primates

actuales.

Y finalmente se indican las principales adaptaciones

anatómicas y su base biomecánica, empezando por la

Cintura Pélvica, Rodilla, Tobillo y haciendo especial

mención de todos y cada uno de los elementos que forman

el pie. Para finalizar se hace referencia a los estudios

realizados en las Pisadas de Laetoli, de una antigüedad

aproximada de 3,7 M.a.
El concepto de contacto articular alternativo de la rodilla
Authors: Pichel Moure C.M.
Published: August 2020

La observación radioscópica de la interlínea articular

de rodillas de cadáveres sin anomalías anatómicas

durante movimientos de abducción y adducción, realizada

en estudios previos del autor, permitió apreciar la

aparición de pérdida de contacto entre las superficies

articulares mediales o laterales respectivamente. El presente

artículo tuvo como objetivo rememorar dichos

estudios y documentar las apreciaciones visuales

mediante el análisis de neumoartrografías seriadas obtenidas

durante movimientos mediolaterales de la rodilla.

La realización de mediciones sobre las imágenes radiográficas

y su tratamiento estadístico confirmaron los

hallazgos obervacionales, poniendo de manifiesto que la

separación de las superficies articulares contralaterales

constituye un fenómeno asociado a los movimientos

mediales ó laterales de la rodilla que sólo permite la presencia

de contacto simultáneo en ambos compartimen- .

tos en posiciones intermedias entre la abducción y la

adducción. La evaluación de éstos resultados en relación

con hallazgos en seres humanos vivos y con resultados

obtenidos por otros autores sugiere que en el transcurso

de su función normal la rodilla puede establecer contacto

indistintamente en cualquiera de los compartimentos,

media1 o latera, o en ambos simultaneamente. Este concepto

«contacto articular alternativo» puede abrir nuevas

vías para la investigación y conocimiento de aspectos

oscuros o poco conocidos del funcionamiento de la

articulación.
Método de análisis biomecánico de la marcha en pacientes portadores de prótesis de rodilla
Authors: Morgenstern de Muller Christian Rudolf , Parreño Catalán José Luis , Ruano Gil D.
Published: August 2020

El análisis de la marcha ha adquirido en los últimos

tiempos un extraordinario desarrollo. En la actualidad la

ciencia biomecánica ofrece un gran campo de actuación

para el estudio de la patología de la deambulación, aplicando

los conocimientos anatómicos, las leyes físicas y

la alta tecnología (ordenadores, video, plataformas de

fuerza, etc ...)

En este estudio, se comparan por medio del análisis

del movimiento en tres dimensiones, la dinámica y el

comportamiento articular de la marcha normal y de la

marcha en el paciente portador de protesis de rodilla

unilateral y bilateral, para analizar si se aprecian diferencias

en las características generales de la marcha y

los cambios evolutivos que provocan estas diferencias y

sus posibles repercusiones patológicas.

La marcha normal tiene una fase de balanceo, seguida

de una fase de apoyo con: choque de talón, apoyo del

retropié, apoyo de la planta, rodadura sobre el borde

extremo, despegue del talón, despegue del primer dedo.

Esta dinámica se acompaña de balanceo de las extremidades

superiores para mantener el equilibrio y compensar

los momentos de inercia provocados por la zancada.
Desarrollo de nuevos cementos óseos a base de fosfato de calcio: resumen de un estudio piloto
Authors: Driessens Ferdinand C. M. , Bermúdez O. , Boltong M.G. , Planell Estany Josep Anton
Published: August 2020

Los cementos basados en fosfatos de calcio ofrecen

una excelente biocompatibilidad y capacidad para promover

el crecimiento óseo, por lo cual son de interés en

odontología y ortopedia. El presente trabajo ha conducido

hasta la fecha a al elaboración de mas de 500 nuevas

formulaciones de cementos de fosfatos de calcio, para

las cuales se han medido parámetros tales como tiempo

de fraguado y resistencia mecánica. De entre dichas formulaciones

se están optimizando las que parece ofrecen

mejores posibilidades. En particular se está estudiando

el efecto sobre la resistencia mecánica de variables

como el tamaño de partícula de los materiales de partida,

porcentaje de semillas, contenido de agua, y porosidad

de los sólidos resultantes.
Estudio de la anteversión femoral
Authors: Casteleiro González R. , Gómez Pellico L. , Fernández Valencia R. , Castaño Zapatero C. , Fernández Camacho F.J.
Published: August 2020

Se estudian los valores angulares de la anteversión

femoral en 30 fémures humanos secos normales, del

lado izquierdo y pertenecientes a individuos adultos.

Los valores angulares de la muestra son sometidos a

estudio estadístico dando una fiabilidad de la media para

p = 0,01 .

Se revisa la bibliografía de otras mediciones realizadas

en hueso seco y se comparan con los valores obtenidos

en este trabajo.

Los valores obtenidos contribuirán a un mejor conocimiento

del ángulo de anteversión femoral y consecuentemente

a la aplicación clínica del mismo.
Biomecánica del complejo periastragalino
Authors: Angulo Carrere Mª. T. , Llanos Alcazar L.F.
Published: August 2020

Bajo el concepto funcional de «COMPLEJO

PERIASTRAGALINOD, se realiza una revisión de las

característifas biomecánicas de las articulaciones que lo

constituye.

Se estudia la movilidad de la articulación del tobillo,

haciendo referencia a su papel en la transmisión de cargas

y a su importancia en el mantenimiento de la estabilidad

y congruencia articular de la unión del pie al extremo

dista1 de la pierna, a traves de la existencia de un

potente sistema ligamentoso.

Se revisan los conceptos de movilidad articular «triplana

», que caracteriza a las articulaciones del retro y

mesopie, los movimientos «preferenciales» de cada una

de estas uniones y, su implicación en los movimientos

conjugados del «COMPLEJO ARTICULAR PERIASTRAGALINO

».
Análisis muscular en situación de equilibrio a través de electromiografía
Authors: Villarroya Aparicio A. , Franco Sierra M.A. , Cambra Mur B. , Criado Fernandez B. , Juana Velasco I. de
Published: August 2020

Se ha realizado un análisis muscular en un equilibrio de gimnasia rítimica deportiva en 2 grupos de niñas: 1)bien entrenadas y que asisten a competiciones periódicamente, y 2) que práctican este deporte como entrenamiento.

El movimiento se ha dividido en cuatro fases (por medio de un goniómetro colocado en la rodilla). Se ha valorado el tiempo que tardan en adquirir el equilibrio y los músculos que participan en el movimiento y el grado en que lo hacen (EMGI), en el miembro inferior que elevan, en el que apoyan y en el tronco. Para ello se ha empleado un sistema telemático biológico de MIE: Medical Researche LTD.

Se aprecia que las niñas menos entrenadas realizan el movimiento de una forma brusca y significativamente más rápida que las más entrenadas.

En el miembro de apoyo hay muy poca actividad de los gemelos en ambos grupos, a diferencia de su antagonista, el tibial anterior, en el que ésta es mucho mayor. Asimismo, hay una actividad importante en el glúteo medio. La actividad en recto anterior o isquiotibiales es mayor en la fase de mantenimiento de la flexión de rodilla del otro miembro inferior, siendo mayor en los isquiotibiales.

Como el movimiento del miembro se eleva, está guiado por la mano, la actividad de los músculos es menor y actúan más manteniendo la posición que en el desarrollo del movimiento.

En el tronco existe una acción alternativa de los músculos de un lado y de otro hasta el establecimiento del equilibrio, manteniéndose poca actividad en ambos lados en las niñas más experimentadas y una actividad mayor en las menos entrenadas.

La actividad muscular es, en general, más intensa en las niñas menos entrenadas, en las que hay una menor adaptación al equilibrio, manteniendo dicha actividad una vez establecida la posición. Las niñas de este grupo realizan contracciones innecesarias de músculos agonistas-antagonistas para mantener la posición, habiendo muchos picos de adaptación a los desequilibrios.
Efecto de las ondas de choque sobre el hueso cortical
Authors: Moreno J. L. , Forriol F. , Cañadel J.
Published: August 2020

La litotricia ha supuesto uno de los adelantos que mayores beneficios

han reportado en los últimos años. Por medio de ondas

de choque se pueden tratar con óptimos resultados las litiasis renales

y vesicales. Esto hace que se estén buscando nuevos campos

de aplicación, pensándose que podrlan ser de utilidad en la cirugfa

ortopédica para fracturar el cemento de las prótesis articulares,

evitando destruir así el hueso o para el tratamiento de las

pseudoartrosis, etc.

Hemos analizado los efectos de las ondas de choque sobre el

hueso cortical empleando un método experimental en corderos

practicando unos or$cios de distinto tamaño, apreciando la formación

de trabeculaciones en el canal medular en la zona de choque

de las ondas y también en las zonas bombardeadas un aumento

de células mesenquimales y de vasos. Sin embargo, este

tratamiento también afecta la reconstrucción normal de hueso y

no produce en ningún momento microfracturas ni otro tipo de alteración

sobre el hueso cortical normal.
ACL forces in activity
Authors: O'Connor J. , Zavatsky A.
Published: August 2020

Durante determinadas actividades, sólo uno de los principales grupos musculares que cruzan la rodilla ejerce fuerza. En tales casos, los ligamentos de la rodilla deben estar cargados. Las fuerzas del ligamento pueden ser calculadas porque deben ser equivalentes al componente resultante paralelo a la meseta tibial de las fuerzas musculares y las cargas externas. En estas circunstancias, las fuerzas del ligamento pueden llegar a ser muy importantes, sobre todo cuando el ligamento está situado en una pendiente fuerte en relación con la meseta tibial.
Metodología en el análisis del gesto deportivo
Authors: Villarroya Aparicio A.
Published: August 2020

Se realiza una revisión del concepto de biomecánica deportiva, insistiendo en la importancia que, dentro de ella, tiene el análisis del movimiento. A continuación se indica la metodología y técnicas que se pueden utilizar para llevar a cabo dicho análisis.
Objetivación de alteraciones funcionales durante la marcha, secundarias a ciatalgia
Authors: Morgenstern de Muller Christian Rudolf , Parreño Catalán José Luis , Schaff P.
Published: August 2020

Se estudia la repercusión funcional motora de la patología discal lumbar sobre la marcha. Se analiza, por medio de plantillas con sensores que permiten registrar las presiones bajo el pie de forma dinámica, la marcha de pacientes afectos de patología de la columna vertebral lumbar susceptible de ser intervenida quirúrgicamente, para establecer la posible correlación entre la afectación radicular y las alteraciones de la marcha.

Se realizan estudios electromiográficos en tibial anterior y tríceps sural a fin de relacionar las alteraciones de la marcha con el funcionamiento de los citados músculos.

Se seleccionan para el estudio los registros de presiones de 100 pacientes escogidos entre un grupo de 170 por presentar una clara afectación de la marcha. Los resultados muestran que de los 89 casos que presentaron alteraciones de la marcha en el registro dinámico de presiones, el 77,3% de las alteraciones en la fase de choque de talón se correspondían con una afectación a nivel L4-L5, y el 90,2% de las alteraciones en la fase de propulsión se correspondían con una afectación a nivel L5-S1.

Se comprueba por medio de electromiografía dinámica, análisis del movimiento y registro de presiones, la relación entre la alteración de fase de choque de talón y la afectación de la raíz L5, así como la alteración de fase de propulsión y la afectación de la raíz S1.

El método biomecánico de registro dinámico de presiones es un método válido para el control de las alteraciones de la marcha producidas por patología de la columna vertebral lumbar con afectación radicular, por lo que abre la posibilidad de valorar objetivamente los déficits funcionales, la evolución, y la recuperación de los pacientes intervenidos por hernia discal.
Bases Biomecánicas de la natación
Authors: Gutiérrez Dávila M.
Published: August 2020

El presente trabajo constituye una revisión general y análisis de los fundamentos biomecánicos básicos implicados en los desplazamientos en medios acuáticos y especialmente en la natación.

Para su estudio se ha considerado al nadador como un sistema mecánico sujeto a las fuerzas externas, las cuales se han dividido, para su estudio, en tres grupos: a) la gravedad y de flotación, b) las propulsivas, como las de arrastre y sustentación y c) las de resistencia, como las de forma y oleaje.

Finalmente y de una forma muy genérica se expone lo que se ha dado en llamar análisis temporal de competición, donde se analizan los tiempos de salida, de nado y de vuelta, con el propósito de orientar al lector hacia una aplicación práctica simple.
Biomecánica del injerto en el raquis
Authors: Martínez Ruiz F.
Published: August 2020

La importancia que las artrodesis tienen en e1 contexto de la cirugía del raquis hace necesaria, por parte del cirujano, una visión de los conceptos biomecánicos implicados en las mismas. El empleo de injertos en sus múltiples variantes, la aplicación auxiliar

de dispositivos intersomáticos y la interrelación entre elementos de fijación e injertos, en cuanto a la estabilidad de la columna se refiere, requieren un conocimiento de la configuración biomecánica resultante antes y después de la artrodesis. En el presente artículo se plantea un análisis de esta configuración, una parte mas del conjunto de conocimientos que constituyen el know how del cirujano de columna.
Common Conceptions and the Metaphysics of Material Substance
Authors: Adriaenssen Han Thomas ,   Zeta Books
Published: August 2020

This paper explores how, according to three early modern philosophers, philosophical theory should relate to our pre-theoretical picture of reality. Though coming from very different backgrounds, the Spanish scholastic, Domingo de Soto, and the English natural philosopher, Kenelm Digby, agreed that an ability to accommodate our pre-theoretical picture of the world and our ordinary way of speaking about reality is a virtue for a philosophical theory. Yet at the same time, they disagreed on what kind of ontology of the material world is implied by these. The Dutch Cartesian, Johannes de Raey, took a very different approach, and argued that the picture of reality we naturally develop from our early days onwards and the language associated with it have their use in domains such as law and medical practice, but are a poor guide to the ontology of the material world. Thus, if we are to arrive at a proper understanding of the nature of matter, we need to move beyond the picture of reality we naturally develop from our early days onwards in order to come to see that the nature of matter consists in bare extension.
Dancing around the Black Box
Authors: Woznicki Christopher ,   Evangelical Philosophical Society
Published: August 2020

Giving the impression that perichoresis solves the “threeness-oneness problem” or the “two natures–one person problem” without an explanation of how perichoresis works is problematic; as such, an explanation of perichoresis ought to be provided. I provide one way to address this problem by drawing upon the work of Eleonore Stump. In contrast to approaches that avoid the metaphysics of perichoresis I provide an account of the metaphysics of perichoresis and suggest that a Stump-inspired account of perichoresis—that is, an account that places an emphasis on the notion of sharing some aspect of the mental life—deserves serious attention by those who feel the weight of the problematic use of perichoresis.
Plantinga and the Balkanization of Reason
Authors: Casey Patrick J. ,   Evangelical Philosophical Society
Published: August 2020

In this paper, I argue that Plantinga maintains it is possible to come to know that Christianity is true, but only from the inside. Further, since Plantinga argues that one’s judgments about the epistemic status of Christian belief depend upon one’s prephilosophical metaphysical views, his position amounts to the claim that the Christian community has privileged access to truth and that non-Christians are ill-equipped to evaluate their beliefs. The upshot of Plantinga’s position is, I suggest, that people from different communities will disagree about the epistemic status of religious belief, and reason is simply incapable of adjudicating those disputes.
O historiador com CNPJ: depressão, mercado de trabalho e história pública
Authors: Telles da Silveira Pedro
Published: August 2020

Historiadoras e historiadores têm enfrentado uma nova série de tensões na tentativa de justificar o trabalho que realizam. Projetos legislativos, discursos políticos, cortes no financiamento de instituições públicas e privadas, todos eles originam uma situação cada vez mais dificultosa para a prática acadêmica. Não por acaso, os casos de depressão e problemas psicológicos na graduação e pós-graduação começaram a ganhar destaque no debate público. Ao mesmo tempo, temos visto também o crescimento da preocupação com a maneira pela qual historiadoras e historiadores podem legitimar perante a sociedade o que fazem. Uma dessas maneiras é a história pública. A partir dessa situação, o objetivo desta contribuição é defender a necessidade de uma discussão mais ampla sobre trabalho e relações trabalhistas no âmbito da história. Assim, propõe-se que os cursos de graduação e pós-graduação em história assumam postura ativa e, até mesmo, propositiva frente ao mercado de trabalho, através da reconfiguração da identidade profissional de historiadoras e historiadores que a história pública oferece. Dessa maneira, considera-se que a história pública tem papel fundamental para encontrar brechas que permitam superar o diagnóstico concomitante do aumento dos casos de depressão e ausência de perspectivas profissionais, de modo a repensar o que as historiadoras e historiadores fazem. Palavras-chave: História Pública. Mercado de Trabalho. Depressão Mental.
MAGNESIOCHROMITE (MgCr2O4) SYNTHESIS: EFFECT OF MECHANICAL AND MICROWAVE PRETREATMENT
Authors: Kosenko Nadezhda F. , Filatova Natalya V. , Egorova Anastasia A.
Published: August 2020

Magnesiochromite spinel synthesis based on oxides, hydroxides and nitrates of magnesium and chromium was investigated. The precursors reactivity was compared by means of effective rate constants calculated by Ginstling-Brounshtein equation. The possibility of use of this equation was confirmed by the dependences linearity with high linear approximation coefficients. The reactivity of MgO various forms (soft-burned, or caustic magnesite, and dead-burned, or periclase) in the spinel formation was compared. Oxide precursors (especially with the periclase participation) reacted with the substantially less rate in comparison with hydroxides and salts. The influence of a preliminary mechanical activation by impact-and-attrition (planetary mill) and attrition (ball-ring mill) action as well as a microwave treatment (2.45 GHz) was analyzed. The most positive effect of a mechanical treatment in a planetary mill that was associated with an activation of Mg and Cr compounds became apparent in the field of relatively low temperatures (700-1100 °С). For example, MgCr2O4 yield at 1000 °С and the joint impact treatment of oxides was twice as much than under the simple mixing. The subsequent temperature rising lead to some decrease of a pretreatment effect so long as diffusion coefficients in these conditions grew, so the reaction run rapidly even without a preliminary mechanical treatment. It was noticed that an appreciable reduction of MgO reactivity in the spinel formation after a certain attrition in a ball-ring mill linked to the plane sliding in cubic crystals and resulted in the removing of the most disordered and defective layer from grains and the plane surface uncovering. The combined method consisting of a mechanical treatment of magnesium and chromium nitrates mixture in a planetary mill and the subsequent burning in a thermal kiln (1000 °С) was considered as the most effective as it resulted in practically single product. The microwave treatment took up an intermediate position by the effectiveness.
Le metteur en scène et les autres ou de la difficulté du partage de l’auctorialité dans le théâtre public français
Authors: Hamidi-Kim Bérénice
Published: August 2020

Cet article vise à élucider tout à la fois les causes et les conséquences d’un paradoxe caractéristique du monde du spectacle vivant subventionné en France : alors que les oeuvres scéniques ont pour particularité, par rapport à d’autres mondes de l’art, de reposer sur le travail collectif d’une grande diversité de corps de métiers, artistiques et techniques, la reconnaissance, tant symbolique qu’économique, est pour l’essentiel captée par la figure, souvent individuelle, du metteur en scène, et ce processus de captation passe principalement par la transfiguration de la figure du metteur en scène en auteur du spectacle.