bluuebunny/crossref_metadata_2025 huggingface dataset:
The association of FMR1 gene (CGG)n variation with idiopathic female infertility
Authors: Grasmane Adele , Rots Dmitrijs , Vitina Zane , Magomedova Valerija , Gailite Linda
Published: June 2019

Introduction

The FMR1 gene plays an important role in brain development and in the regulation of ovarian function. The FMR1 gene contains CGG repeat variation and the expansion of the repeats is associated with various phenotypes e.g. fragile X syndrome, premature ovarian failure, etc. Repeats ranging < 55 CGG are considered normal, however recent studies suggest that high-normal (35–54 CGG) and low-normal (< 26 CGG) alleles may also have an impact on female reproductive function.

Material and methods

We have performed a case-control study to assess the impact of FMR1 gene CGG repeats on female infertility. The study comprised 161 women with primary and secondary idiopathic infertility and 12 females with diminished ovarian reserve. The control group consisted of 129 healthy women with children. The FMR1 gene trinucleotide CGG repeat variation was detected using a triplet repeat primed polymerase chain reaction with capillary electrophoresis.

Results

The analysis of CGG repeats revealed that high-normal alleles are statistically significantly more common in the secondary infertility group than in controls (12% vs. 4.3%, p = 0.03, OR = 3.1, 95% CI: 1.1–8.3). The distribution of high-normal alleles and genotypes did not differ between patients with primary infertility and controls (p > 0.05). In addition, the analysis of low-normal allele and genotype frequencies did not present a difference between primary, secondary infertility and the control group (p > 0.05).

Conclusions

In our study, the FMR1 gene high-normal alleles were associated with secondary infertility. However, to address the controversies related to the role of FMR1 genes in the development of diminished ovarian reserve, further studies on the subject are required.
Increased oxytocinergic system activity in the cardiac muscle in spontaneously hypertensive SHR rats
Authors: Wsol Agnieszka , Gondek Agata , Podobinska Martyna , Chmielewski Marek , Sajdel-Sułkowska Elżbieta , Cudnoch-Jędrzejewska Agnieszka
Published: June 2019

Introduction

The present study aimed to determine whether the presence of cardiac hypertrophy due to arterial hypertension is associated with a change in the activity of the oxytocinergic system in cardiomyocytes.

Material and methods

The experiments were performed on male, spontaneously hypertensive rats (SHR, n = 10) and normotensive Wistar-Kyoto rats (WKY, n = 12). Blood samples were collected from both SHR and WKY animals to asses plasma oxytocin (OT) concentration; the rats were sacrificed by decapitation. Samples of the left and right ventricles were harvested for the analysis of the OT and oxytocin receptor (OTR) protein by ELISA, and OT and OTR mRNA expression by RT-PCR. Immunohistopathological studies were performed to confirm the presence of OTR receptors in the cardiac muscle of the ventricles.

Results

Plasma OT concentration did not differ between SHR and WKY rats. In the SHR rats, the expression of OT mRNA and the OT protein level was higher in the left and the right ventricle, while OTR mRNA expression was significantly lower in both the left and the right ventricle. However, the level of OTR protein was higher only in the left ventricle of the SHR rats. The presence of OTR receptors was confirmed by immunohistochemical analysis in the muscle of the right and left ventricle.

Conclusions

The presence of arterial hypertension is associated with increased activity of the oxytocinergic system in the heart, especially in the area of the left ventricle. These findings support the important role of this system in the maintenance of cardiovascular homeostasis.
New particle formation events observed at the King Sejong Station, Antarctic Peninsula – Part 2: Link with the oceanic biological activities
Authors: Jang Eunho , Park Ki-Tae , Yoon Young Jun , Kim Tae-Wook , Hong Sang-Bum , Becagli Silvia , Traversi Rita , Kim Jaeseok , Gim Yeontae
Published: June 2019

Abstract. Marine biota is an important source of atmospheric
aerosol particles in the remote marine atmosphere. However, the relationship between new particle formation and marine biota is poorly quantified.
Long-term observations (from 2009 to 2016) of the physical properties of
atmospheric aerosol particles measured at the Antarctic Peninsula (King
Sejong Station; 62.2∘ S, 58.8∘ W) and satellite-derived
estimates of the biological characteristics were analyzed to identify the
link between new particle formation and marine biota. New particle formation
events in the Antarctic atmosphere showed distinct seasonal variations, with the highest values occurring when the air mass originated from the ocean
domain during the productive austral summer (December, January and February).
Interestingly, new particle formation events were more frequent in the air
masses that originated from the Bellingshausen Sea than in those that
originated from the Weddell Sea. The monthly mean number concentration of
nanoparticles (2.5–10 nm in diameter) was >2-fold higher when the air
masses passed over the Bellingshausen Sea than the Weddell Sea, whereas the
biomass of phytoplankton in the Weddell Sea was more than ∼70 %
higher than that of the Bellingshausen Sea during the austral summer
period. Dimethyl sulfide (DMS) is of marine origin and its oxidative
products are known to be one of the major components in the formation of new
particles. Both satellite-derived estimates of the biological
characteristics (dimethylsulfoniopropionate, DMSP; precursor of DMS) and
phytoplankton taxonomic composition and in situ methanesulfonic acid (84
daily measurements during the summer period in 2013 and 2014) analysis
revealed that DMS(P)-rich phytoplankton were more dominant in the
Bellingshausen Sea than in the Weddell Sea. Furthermore, the number
concentration of nanoparticles was positively correlated with the biomass of
phytoplankton during the period when DMS(P)-rich phytoplankton predominate.
These results indicate that oceanic DMS emissions could play a key role in
the formation of new particles; moreover, the taxonomic composition of
phytoplankton could affect the formation of new particles in the Antarctic
Ocean.
Impacts of H2O variability on accuracy of CH4 observations from MIPAS satellite over tropics
Authors: Yirdaw Berhe Temesgen , Mengistu Tsidu Gizaw , Blumenstock Thomas , Hase Frank , von Clarmann Thomas , Notholt Justus , Mahieu Emmanuel
Published: June 2019

Abstract. Uncertainties of tropical methane concentrations, retrieved from spectra recorded by the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), MIPAS version V5R_CH4_220 are large. We explore the relation of these uncertainties with water vapour variability. We further show that these uncertainties have been reduced in MIPAS version V5R_CH4_224. Coincident measurements of CH4 by MIPAS, ground based FTIR and CH4 derived from EOS MLS coincident measurements of atmospheric water vapour (H2O), carbon monoxide (CO) and nitrous oxide (N2O) are used to estimate the standard uncertainty of MIPAS CH4 220, MIPAS CH4 224 and natural variability of H2O. Different methods such as bias evaluation, differential method and correlation coefficient are employed to explore the latitudinal variations of standard uncertainty of MIPAS CH4 220 and natural variability of water vapour as well as its reduction on MIPAS CH4 224. The averaged bias between MIPAS CH4 220 and ground-based FTIR measurements are −12.3 %, 8.4 % and 1.2 % for tropics, mid-latitudes and high latitudes, respectively. The standard deviations of the differences for these latitudinal bands are 5.9 %, 4.8 % and 4.7 %. More-over, the correlation coefficient between MIPAS CH4 220 and MIPAS V5R_N2O_220 is 0.32 in the upper troposphere and lower stratosphere over tropics and larger than the mod-est value 0.5 in mid and high latitudes. The poor correlation between MIPAS CH4 220 and MIPAS N2O 220 over tropics can indicate the large uncertainty of MIPAS CH4 220 over tropics that is related to water variability. Similarly, mean relative difference between MIPAS CH4 224 and ground-based FTIR measurements are 3.9 %, −2.6 % and −2.7 % in altitude 15–21 km and the average estimated uncertainty of MIPAS CH4 224 methane were obtained 2.4 %, 1.4 % and 5.1 % in altitude ranges of 15 to 27 km for tropics, mid and high latitudes, respectively. The estimated measurement uncertainty of MIPAS CH4 224 is different for the three latitude bands in the northern hemisphere, reflecting the latitudinal variation of uncertainties of MIPAS methane. However, the large reduction of uncertainty in MIPAS CH4 224 as com-pared to MIPAS CH4 220 has been confirmed for the tropical measurements. The correlation coefficients between the uncertainty of MIPAS CH4 220 and the variability of water vapour in lower stratosphere are strong (0.88) on monthly temporal scales. Similar methods were used for MIPAS CH4 224. It was found that the uncertainty in methane due to the variability of water vapor has been reduced.
A PROCESS-ORIENTED SPATIOTEMPORAL CLUSTERING METHOD FOR COMPLEX TRAJECTORIES
Authors: Liu J. , Xue C. , Wu C. , Dong Q.
Published: June 2019

Abstract. Considering the critical role of trajectory data in Big Data era for dynamic geographical processes, human behaviour analysis and meteorological prediction, trajectory clustering has attracted growing attention. Many literatures have discussed the spatiot emporal clustering method of simple trajectories (i.e., has no branches, e.g. vehicle trajectories), yet there are few researches for clustering complex trajectories (i.e., has at least one split and/or merger and/or split -merger branch, e.g. ocean eddy trajectories, rainstorm trajectories). For addressing this issue, we propose a Process-Oriented Spatiotemporal Clustering Method (POSCM) for clustering complex trajectory data. The POSCM includes three parts: the first uses the semantic of process-sequence-state to represent the complex trajectories; the second proposes a Hierarchical Similarity Measurement Method (HSMM) to get the similarity between any two complex trajectories; in the last step, the complex trajectories clustering pattern is extracted through density-based clustering algorithm. Experiments on simulated trajectories are used to evaluate the POSCM and demonstrate the advantage by comparing against that of the VF2 algorithm. The POSCM is applied to the sea surface temperature abnormal variations trajectories from January 1950 to December 2017 in the Pacific Ocean. As shown in this case study, some new mined spatiotemporal patterns can provide new references for understanding the behaviours of marine abnormal variations under the background of the global change.
LITHOLOGICAL MAPPING USING LANDSAT 8 OLI AND ASTER MULTISPECTRAL DATA IN IMINI-OUNILLA DISTRICT SOUTH HIGH ATLAS OF MARRAKECH
Authors: Ourhzif Z. , Algouti A. , Algouti A. , Hadach F.
Published: June 2019

Abstract. This study exploited the multispectral Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and Landsat 8 Operational Land Imager (OLI) data in order to map lithological units and structural map in the south High Atlas of Marrakech. The method of analysis was used by principal component analysis (PCA), band ratios (BR), Minimum noise fraction (MNF) transformation. We performed a Support Vector Machine (SVM) classification method to allow the joint use of geomorphic features, textures and multispectral data of the Advanced Space-borne Thermal Emission and Reflection radiometer (ASTER) satellite. SVM based on ground truth in addition to the results of PCA and BR show an excellent correlation with the existing geological map of the study area. Consequently, the methodology proposed demonstrates a high potential of ASTER and Landsat 8 OLI data in lithological units discrimination. The application of the SVM methods on ASTER and Landsat satellite data show that these can be used as a powerful tool to explore and improve lithological mapping in mountainous semi-arid, the overall classification accuracy of Landsat8 OLI data is 97.28% and the Kappa Coefficient is 0.97. The overall classification accuracy of ASTER using nine bands (VNIR-SWIR) is 74.88% and the Kappa Coefficient is 0.71.
ANALYSIS OF COMMON QUALITY PROBLEMS IN COORDINATE TRANSFORMATION BETWEEN REFERENCE COORDINATE SYSTEM AND GEOCENTRIC COORDINATE SYSTEM
Authors: Zhang X. , Zhang J. , Zhang L. , Liu J.
Published: June 2019

Abstract. In the working of the existing reference coordinate system transformed into the coordinate system of the geocentric coordinate system, many experts and scholars have in-depth research on the transformation methods such as geodetic control point results (including GNSS base station coordinates, GNSS control point coordinates, triangle point coordinates), basic geographic information data results (including DLG, DOM, DEM, DRG, DSM, etc.) and other spatial information data. On the basis of these studies, many provinces and cities have completed the coordinate system transformation of surveying and mapping results in China. This paper expounds the method of transforming the existing reference coordinate system into the geocentric coordinate system, summarizes and sorts out the common quality problems in the process of different data and different methods, and analyses the causes of the problems and the impact on the transforming results. Based on the above work, The paper provides reference and suggestions for the transforming work, which is aimed to improve the transformation quality in the future.
SPATIOTEMPORAL CHANGE OF URBAN AGRICULTURE USING GOOGLE EARTH IMAGERY: A CASE OF MUNICIPALITY OF NAKHONRATCHASIMA CITY, THAILAND
Authors: Jantakat Y. , Juntakut P. , Plaiklang S. , Arree W. , Jantakat C.
Published: June 2019

Abstract. Presently, urban agriculture (UA) is an important part of the urban ecosystem and a key factor that can help in the urban environmental management. Therefore, this paper studies a spatial-temporal analysis of UA areas and types in Municipality of Nakhonratchasima City (MNC), Thailand. This UA types referred land use classification system of Land Development Department (LDD). Google Earth images acquired in the years of 2007, 2011, 2015 and 2018 were used to examine UA change with segmentation-based classification method in QGIS to classify Google Earth images into thematic maps. Moreover, this study showed different spatiotemporal change patterns, composition and rates in the study area and indicates the importance of analyzing UA change. Therefore, the results of this classification consisted of eleven classes – abandoned paddy field, rice paddy, abandoned field crop, mixed field crop, cassava, betel palm, mixed orchard, coconut, rose apple, truck crop, and fish farm. Truck crop had the greatest cover in study area while floricultural covered the minimal space over periods of study. The UA change analysis over time for entire study areas provides an overall picture of change trends. Furthermore, the UA change at census sector scale gives new insights on how human-induced activities (e.g., built-up areas and roads) affect UA change patterns and rates. This research indicates the necessity to implement change detection for better understanding the UA change patterns and rates.
SPATIO-TEMPORAL MODELLING & THE NEW URBAN AGENDA IN POST-APARTHEID SOUTH AFRICA
Authors: Mokoena B. T. , Moyo T. , Makoni E. N. , Musakwa W.
Published: June 2019

Abstract. This paper presents the potentialities of spatio-temporal modelling in transforming South Africa’s previously marginalised townships. Using the Katlehong township in Ekurhuleni as a case study, the paper argues that the hitherto marginalised townships can benefit from a localised implementation of smart-city concepts as articulated in the Integrated Urban Development Framework. Instead of viewing townships as spaces of perpetual despair and hopelessness, the paper appreciates these areas as having the potential to benefit from new smart innovative planning approaches that form part of the Fourth Industrial Revolution. So, the discussion identifies smart transportation modes such as bicycle-sharing, as well as Bus Rapid Transit Networks as critical in promoting mobility in and beyond townships, while contributing to spatial integration and transformation. Using geolocation data, the paper concludes that formerly marginalised townships such as Katlehong can and must form part of the emergent smart cities in South Africa.
GEOBIM BENCHMARK 2019: DESIGN AND INITIAL RESULTS
Authors: Noardo F. , Arroyo Ohori K. , Biljecki F. , Krijnen T. , Ellul C. , Harrie L. , Stoter J.
Published: June 2019

Abstract. GeoBIM, the integration of 3D geoinformation (Geo) with building information models (BIM), is a subject of increasing attention in both domains. A well-known practical challenge for this integration is the mixed state of software support for open standards in each domain that would ease the integration. This is often known by practitioners but poorly documented. In order to solve this problem, we devised the GeoBIM benchmark, in which we compile the experiences of volunteering participants, who perform a guided study to test the software they are most familiar with against a few provided datasets structured in open standards. The aim of the tests is to improve the knowledge of the state of the art in the software support for GeoBIM open standards and to identify points for improvement. In this paper, we present the design of the benchmark, especially explaining and discussing the chosen data to be used with their connected issues to be tested, and some initial results.
EXPLORING THE RELATIONSHIP BETWEEN TRAVEL PATTERN AND SOCIAL-DEMOGRAPHICS USING SMART CARD DATA AND HOUSEHOLD SURVEY
Authors: Zhang Y. , Cheng T. , Aslam N. S.
Published: June 2019

Abstract. Understanding social-demographics of passengers in public transit systems is significant for transportation operators and city planners in many real applications, such as forecasting travel demand and providing personalised transportation service. This paper develops an entire framework to analyse the relationship between passengers’ movement patterns and social-demographics by using smart card (SC) data with a household survey. The study first extracts various novel travel features of passengers from SC data, including spatial, temporal, travel mode and travel frequency features, to identify long-term travel patterns and their seasonality, for the in-depth understanding of ‘how’ people travel in cities. Leveraging household survey data, we then classify passengers into several groups based on their social-demographic characteristics, such as age, and working status, to identify the homogeneity of travellers for understanding ‘who’ travels using public transit. Finally, we explore the significant relationships between the travel patterns and demographic clusters. This research reveals explicit semantic explanations of ‘why’ passengers exhibit these travel patterns.
TOPOGRAPHIC ANALYSIS OF CHANG’E-4 LANDING SITE USING ORBITAL, DESCENT AND GROUND DATA
Authors: Di K. , Liu Z. , Liu B. , Wan W. , Peng M. , Li J. , Xie J. , Jia M. , Niu S. , Xin X. , Li L. , Wang J. , Yue Z. , Gou S. , Wang Y. , Wang R. , Liu J. , Bo Z. , Liu C. , Yu T. , Xi L. , Miao Y.
Published: June 2019

Abstract. The Chang’e-4 (CE-4) probe, which includes a lander and a rover, was successfully landed in Von Kármán crater inside the South Pole-Aitken basin on January 3, 2019. Landing site mapping and topographic analyses have been performed at different scales using orbital, descent and ground data to support mission operations and various scientific investigations. We produced a 0.9 m-resolution seamless digital orthophoto map (DOM) mosaic of the CE-4 landing site region covering 51 km × 30 km using 100 Lunar Reconnaissance Orbiter Camera (LROC) Narrow-Angle Camera (NAC) images. Within an area of 3.2 km × 3.0 km of the the DOM around the lander, more than 11,000 craters with diameter greater than 5 m have been identified and measured. A 0.03 m- resolution DOM, which covers an area of 211 m × 187 m, was generated using descent images, and has been used as one of the base maps for overall rover traverse planning. During surface operations, local DEMs with 0.02 m resolution are routinely produced and topographic analysis have been performed at each waypoint using Navcam images and at some locations using Pancam images, to support waypoint-to-waypoint path planning, science target selection and scientific investigations.
ATMOSPHERICALLY COMPENSATED SHAPE FROM SHADING ON THE MARTIAN SURFACE: TOWARDS THE PERFECT DIGITAL TERRAIN MODEL OF MARS
Authors: Hess M. , Wohlfarth K. , Grumpe A. , Wöhler C. , Ruesch O. , Wu B.
Published: June 2019

Abstract. We have expanded our existing Shape and Albedo from Shading framework which has primarily been used to generate Digital Terrain Models (DTMs) of the Lunar Surface. The extension consists of an atmospheric model such that the approach can be applied to Mars which is covered by a thin atmosphere. The atmospheric model includes attenuation by the atmosphere, diffuse illumination of the surface and scattering from the atmosphere into the direction of the sensor with physically motivated parameters. To estimate the newly introduced atmospheric parameters without additional CRISM measurements, the radiance image and an initializing surface are used. The initial surface is derived from stereo images and serves two purposes. On the one hand, it is the height constraint of the SfS algorithm and on the other hand, it is used for estimating the atmospheric parameters. Relying on this estimation, the aforementioned Shape and Albedo from Shading method is carried out. The results show a considerable improvement compared to DTMs derived with stereo algorithms. The omnipresent stereo artifacts such as pixel locking and mismatches are smoothed out and small details are reconstructed convincingly. The procedure is then compared to the reconstruction without atmospheric compensation. Images in which shadows are present benefit from this method because shadows can now be described by the diffuse illumination of the surface. The reconstruction results indicate the viability of the approach since it can produce convincing DTMs compared to HiRISE ground truth.
HIGH PRECISION DTM AND DOM GENERATING USING MULTI-SOURCE ORBITAL DATA ON CHANG’E-4 LANDING SITE
Authors: Liu B. , Niu S. , Xin X. , Jia M. , Di K. , Liu Z. , Peng M. , Yue Z.
Published: June 2019

Abstract. Chang’e-4 (CE-4) has successfully soft landed in Von Kármán crater inside the South Pole-Aitken (SPA) basin at 10:26 am on January 3, 2019. High precision landing site mapping plays an essential role in mission operations and science applications before and after landing. In this paper, we propose a novel method for generating the highest resolution and the best precision Digital Terrain Model (DTM) and Digital Orthophoto Map (DOM) of the CE-4 landing area using available multi-source data. First, the CE-2 DTM is co-registered to SLDEM2015. Then the vertical inconsistencies of the co-registered DTMs are analysed and the biases of CE-2 DTM with respect to SLDEM2015 are erased. Finally, a new DTM with more information and better precision is generated by fusion of the co-registered DTMs. Using the new DTM as a reference, a seamless DOM is generated based on block adjustment of projected imagery, which can reduce the inconsistencies among the corrected images to sub-pixel level. As a result, a DTM of the Von Kármán crater area ( 42º S–48° S/172º E–180° E) and a seamless DOM covering an area of 2.3° in longitude and 1° in latitude with a ground sample distance of 0.9 m are generated using the developed method.
THE OVERVIEW OF THE PLANETARY ATMOSPHERIC SPECTRAL TELESCOPE (PAST) IN THE SCIENTIFIC EXPERIMENTAL SYSTEM IN NEAR-SPACE (SENSE)
Authors: Meng Q. , He F. , Zhao W. , Wang K. , Yang L. , Dong J. , Wang X.
Published: June 2019

Abstract. To investigate mass transport and energy dissipation in space environments for solar system planet, a balloon-borne planetary atmospheric spectral telescope (PAST) is designed with 0.8-m aperture in spectral range from 280 nm to 680 nm will be floated at 35–40 km altitude to observe and investigate the global space environment of Mercury, Venus, Mars, and Jupiter. The telescope is designed by Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences (CIOMP, CAS), and supported by the Strategic Priority Research Program of Chinese Academy of Sciences, that is the Scientific Experimental system in Near-SpacE (SENSE). The telescope is mainly supported by a Ritchey-Chrétien optical system which can achieve 0.5" angular resolution observation, and the optical system has the function of focusing and stabilizing. The telescope is combined with a two-dimension rotate platform to achieve planetary atmospheric imaging in long exposure time. This paper mainly introduces the PAST scheme briefly.
ANOMALY DETECTION PERFORMANCE COMPARISON ON ANOMALY-DETECTION BASED CHANGE DETECTION ON MARTIAN IMAGE PAIRS
Authors: Putri A. R. D. , Sidiropoulos P. , Muller J.-P.
Published: June 2019

Abstract. The surface of Mars has been imaged in visible wavelengths for more than 40 years since the first flyby image taken by Mariner 4 in 1964. With higher resolution from orbit from MOC-NA, HRSC, CTX, THEMIS, and HiRISE, changes can now be observed on high-resolution images from different instruments, including spiders (Piqueux et al., 2003) near the south pole and Recurring Slope Lineae (McEwen et al., 2011) observable in HiRISE resolution. With the huge amount of data and the small number of datasets available on Martian changes, semi-automatic or automatic methods are preferred to help narrow down surface change candidates over a large area.To detect changes automatically in Martian images, we propose a method based on a denoising autoencoder to map the first Martian image to the second Martian image. Both images have been automatically coregistered and orthorectified using ACRO (Autocoregistration and Orthorectification) (Sidiropoulos and Muller, 2018) to the same base image, HRSC (High-Resolution Stereo Camera) (Neukum and Jaumann, 2004; Putri et al., 2018) and CTX (Context Camera) (Tao et al., 2018) orthorectified using their DTMs (Digital Terrain Models) to reduce the number of false positives caused by the difference in instruments and viewing conditions. Subtraction of the codes of the images are then inputted to an anomaly detector to look for change candidates. We compare different anomaly detection methods in our change detection pipeline: OneClassSVM, Isolation Forest, and, Gaussian Mixture Models in known areas of changes such as Nicholson Crater (dark slope streak), using image pairs from the same and different instruments.
ROAD NETWORK COMPARISON AND MATCHING TECHNIQUES. A WORKFLOW PROPOSAL FOR THE INTEGRATION OF TRAFFIC MESSAGE CHANNEL AND OPEN SOURCE NETWORK DATASETS
Authors: Ajmar A. , Arco E. , Boccardo P.
Published: June 2019

Abstract. The rapid growth of methods and techniques to acquire geospatial data has led to a wide availability of overlapping geographic datasets with different characteristics. Road network data sources are today a significant number, with high differences in level of detail and modelling schemas, depending on the main purpose. In addition, continuous information about people and freight movement is today available also in real-time. This type of data is today exchanged between traffic operators using referencing standards as Traffic Message Channel. Integrating these heterogeneous databases, in order to build an added value product, is a serious task in geographical data management. The paper is focus on techniques to conflate the Traffic message Channel logical network on Open Source road network dataset, in order to allow the precise visualisation of traffic data also in real-time.A first step of the research was the quality assessment of available Open Source (OS) road network dataset, then, a specific procedure to conflate data was set up, using an iterative process in order to reduce at every step the number of possible matching features. A first application of the enhanced OTM dataset is shown for the city of Turin: real-time open data of traffic flows recorded by road network fixed sensors, made available by the metropolitan Traffic Operation Centre (5T) and based on the TMC location referencing, are matched on the OTM road network, allowing a detailed real-time visualisation of traffic state.
UPDATING A ROAD NETWORK DATASET EXPLOITING THE RESULTS OF SEMANTIC SEGMENTATION TECHNIQUES APPLIED TO STREET-LEVEL IMAGERY
Authors: Ajmar A. , Arco E. , Boccardo P. , Giulio Tonolo F. , Yoong J.
Published: June 2019

Abstract. Traffic (or road) signs are an important component for applications in the mobility domain. When integrated with a road network, traffic signs, e.g. speed limits, restricted access, breakthrough prohibition signs, provide information that can be exploited in determining impedances, travel times and routing options. Additionally, the availability of a traffic sign geospatial dataset is considered crucial, especially when installation and maintenance tasks are strictly managed by road concessionaires. Unfortunately, public and private road concessionaires not always have this kind of dataset, and its generation could be highly demanding in terms of both human and time resources.The focus of this paper is on exploring the fit for purpose of semantic segmentation techniques to feed and update existing road network datasets and traffic sign censuses, exploiting free and open mapping initiative like Mapillary (possibly including commercial derivative products) and OpenStreetMap (OSM). More specifically, the authors are analysing the best approaches for integrating the results of map features extraction into road network data with the objective to develop a semi-automated procedure for supporting this task and made it feasible over large urban areas.
USING AND IMPROVING MAPATHON DATA THROUGH HACKATHONS
Authors: Coetzee S. , Rautenbach V. , Green C. , Gama K. , Fourie N. , Goncalves B. A. , Sastry N.
Published: June 2019

Abstract. Geospatial data is essential for the development of the blue economy: for sustainable coastal management of coastal areas and to unlock economic potential from marine and ocean resources. In developing countries, such as South Africa, there are often gaps in the data with significant implications for the blue economy. We conducted a project aimed at addressing these data gaps by experimenting with a circular process where geospatial data for selected areas on the South African coastline were collected through mapathons and used in applications that were developed during hackathons. We validated this circular approach with two iterations of mapathons and hackathons, and found that 1) the size and location of the map area need to be carefully chosen; 2) those creating the apps needed a huge amount of help in dealing with the geospatial data; and 3) any geospatial data is useful for the blue economy, not only data with a very specific purpose in the blue economy context, such as coastal access points. Overall, the geospatial data usability improved from one iteration to another and would certainly improve if more iterations were added. Similar to the deployment of mapathons for disaster relief, future research could focus on hosting hackathons for the rapid development of apps to assist with disaster relief operations. Generally, the hosting of mapathons and hackathons in lockstep is a novel way of exposing students to interdisciplinary collaboration in international teams with a common goal.
A COMPARISON OF UWB AND MOTION CAPTURE UAV INDOOR POSITIONING
Authors: Masiero A. , Fissore F. , Antonello R. , Cenedese A. , Vettore A.
Published: June 2019

Abstract. The number of applications involving unmanned aerial vehicles (UAVs) grew dramatically during the last decade. Despite such incredible success, the use of drones is still quite limited in GNSS denied environment: indeed, the availability of a reliable GNSS estimates of the drone position is still fundamental in order to enable most of the UAV applications. Given such motivations, in this paper an alternative positioning system for UAVs, based on low cost ultra-wideband band (UWB) is considered. More specifically, this work aims at assessing the positioning accuracy of UWB-based positioning thanks to the comparison with positions provided by a motion capture (MoCap) system. Since the MoCap accuracy is much higher than that of the UWB system, it can be safely used as a reference trajectory for the validation of UWB estimates. In the considered experiment the UWB system allowed to obtain a root mean square error of 39.4 cm in 3D positioning based on the use of an adaptive extended Kalman filter, where the measurement noise covariance was adaptively estimated.
AUTOMATIC CAMERA SYSTEM CALIBRATION WITH A CHESSBOARD ENABLING FULL IMAGE COVERAGE
Authors: Wohlfeil J. , Grießbach D. , Ernst I. , Baumbach D. , Dahlke D.
Published: June 2019

Abstract. Geometric camera calibration is a mandatory prerequisite for many applications in computer vision and photogrammetry. Especially when requiring an accurate camera model the effort for calibration can increase dramatically. For the calibration of the stereo-camera used for optical navigation a new chessboard based approach is presented. It is derived from different parts of existing approaches which, taken separately, are not able to meet the requirements. Moreover, the approach adds one novel main feature: It is able to detect all visible chessboard fields with the help of one or more fiducial markers simply sticked on a chessboard (AprilTags). This allows a robust detection of one or more chessboards in a scene, even from extreme perspectives. Except for the acquisition of the calibration images the presented approach enables a fully automatic calibration. Together with the parameters of the interior and relative orientation the full covariance matrix of all model parameters is calculated and provided, allowing a consistent error propagation in the whole processing chain of the imaging system. Even though the main use case for the approach is a stereo camera system it can be used for a multi-camera system with any number of cameras mounted on a rigid frame.
MASS BALANCE OF ANTARCTIC ICE SHEET FROM 2003 TO 2008: A SYSTEMATICALLY IMPROVED NEW ESTIMATION
Authors: Li R. , Xie H. , Tian Y. , Du W. , Chen J. , Hai G. , Zhang S. , Tong X.
Published: June 2019

Abstract. There exist several results of mass balance of the Antarctic Ice Sheet (AIS) estimated based the laser altimetry ICESat, especially for some with a significant difference. In this study, we attempt to use the ICESat data to re-estimate the mass balance of the AIS over 2003-2008 by making several systematic improvements in data processing and model construction. We applied all corrections to the ICESat data including the re-estimation of the ICB. A three-step model was used in different area for calculating elevation changes of the Antarctica ice sheet. The elevation change rate was compared with other results generated from Global Position System (GPS), stakes, Airborne Terrain Mapper (ATM) and CHINRE data. These verification data proved a good agreement between each other considering the uncertainty involved. We also corrected the component in the elevation change rates that do not contribute to the mass loss such as the global isostatic correction and firn compaction. The corrected elevation change result was converted to the mass change using a surface density model.
EVALUATING GLACIER DYNAMICS USING TEMPORAL REMOTE SENSING IMAGES: A CASE STUDY OF HUNZA VALLEY, NORTHERN PAKISTAN
Authors: Shafique M. , Faiz B. , Bacha A.
Published: June 2019

Abstract. Glaciers are the major source of water for drainage network. Northern Pakistan is hosting some of the largest and longest glaciers. Studies evaluating the temporal dynamics of glaciers in Pakistan shows contradictory results of retreat, stable of advancing behavior. Aim of the present study is to evaluate the temporal dynamics in three glaciers in northern Pakistan, using Landsat satellite images. The Landsat images for the years of 1977, 1999, 2001, 2007, 2009 and 2014 shows retreat in selected Hispar, Birpu and Bualtar glaciers. To evaluate the impact of weather indicators of the glaciers dynamics, the temporal glaciers inventories were compared with the rainfall and temperature for the corresponding years. This study should assist to understand the glaciers dynamics and future climate of the region.
FEATURE FILTERING AND SELECTION FOR DRY MATTER ESTIMATION ON PERENNIAL RYEGRASS: A CASE STUDY OF VEGETATION INDICES
Authors: Alckmin G. T. , Kooistra L. , Lucieer A. , Rawnsley R.
Published: June 2019

Abstract. Vegetation indices (VIs) have been extensively employed as a feature for dry matter (DM) estimation. During the past five decades more than a hundred vegetation indices have been proposed. Inevitably, the selection of the optimal index or subset of indices is not trivial nor obvious. This study, performed on a year-round observation of perennial ryegrass (n = 900), indicates that for this response variable (i.e. kg.DM.ha−1), more than 80% of indices present a high degree of collinearity (correlation > |0.8|.) Additionally, the absence of an established workflow for feature selection and modelling is a handicap when trying to establish meaningful relations between spectral data and biophysical/biochemical features. Within this case study, an unsupervised and supervised filtering process is proposed to an initial dataset of 97 VIs. This research analyses the effects of the proposed filtering and feature selection process to the overall stability of final models. Consequently, this analysis provides a straightforward framework to filter and select VIs. This approach was able to provide a reduced feature set for a robust model and to quantify trade-offs between optimal models (i.e. lowest root mean square error – RMSE = 412.27 kg.DM.ha−1) and tolerable models (with a smaller number of features – 4 VIs and within 10% of the lowest RMSE.)
THE SUPERSPECTRAL/HYPERSPATIAL WORLDVIEW-3 AS THE LINK BETWEEN SPACEBORNE HYPERSPECTRAL AND AIRBORNE HYPERSPATIAL SENSORS: THE CASE STUDY OF THE COMPLEX TROPICAL COAST
Authors: Collin A. M. , Andel M. , James D. , Claudet J.
Published: June 2019

Abstract. Earth observation of complex scenes, such as coastal fringes, is based on a plethora of optical sensors constrained by trade-offs between spatial, spectral, temporal and radiometric resolution. The spaceborne hyperspectral EO-1 Hyperion sensor (decommissioned in 2017) was able to acquire imagery with 10 nm spectral (220 bands) at 30 m spatial resolutions over 1424.5 km2 scenes. Conversely, the widespread unmanned airborne vehicle (UAV) hyperspatial DJI Mavic Pro camera can collect only natural-coloured imagery of 100 nm spectral (3 bands) but at 0.1 m spatial resolution over ∼10 km2 scenes (with a single battery and calm meteo-marine conditions). The spaceborne WorldView-3 (WV3), featured by 60 nm spectral (16 bands) at 0.3 m spatial resolution (when pansharpened) over 1489.6 km2 scenes, has the capacity to bridge both sensors. This study aims at testing the spectral and spatial performances of the WV3 to discriminate 10 complex coastal classes, ranging from ocean, reefs and terrestrial vegetation in Moorea Island (French Polynesia). Our findings show that geometrically- and radiometrically-corrected 0.3-m 16-band WV3 bands competed with (30-m) 167-band Hyperion performance for classifying 10 coastal classes with 2-neuron artificial neural network modelling, while being able to segment objects seized by 0.1-m (3-band) UAV. Unifying superspectral and hyperspatial specificities, the WV3 also leverages hypertemporal resolution, that is to say 1-day temporal resolution, rivalling UAV’s one.
APPLICATION OF HYPERSPECTRAL THERMAL EMISSION SPECTROMETER (HYTES) DATA FOR HYSPIRI OPTIMAL BAND POSITIONING TO CHARACTERIZE SURFACE MINERALS
Authors: Ullah S. , Iqbal A.
Published: June 2019

Abstract. This study aimed to characterize surface minerals from high dimensional HyTES (Hyperspectral Thermal Emission Spectrometer) data comprised of 256 spectral bands between 7.5 and 12 μm (i.e., TIR domain of the electromagnetic spectrum). The HyTES is across-track imager and can image 512 pixels with spatial resolution varies between 5 to 50 m depending upon aircraft flying height. HyTES is developed to support the HyspIRI (Hyperspectral Infrared Imager) mission by acquiring TIR data at much higher spectral and spatial resolutions in-order to define the optimum band positions for the TIR instrument of HyspIRI. For earth compositional mapping, the HyTES images of Cuprite and Death Valley regions were acquired in summer 2014 and spectral emissivities of fifteen minerals classes were extracted from regions of known mineral compositions and were randomly divided into training and testing sets (each mineral class com-prised of 100 spectra). These extracted emissivity signatures were then used for categorizing minerals and for finding HyspIRI's optimal band positions for earth composition mapping using Genetic Algorithm (GA) coupled with Spectral angle mapper (SAM). The GA-SAM was trained for fifteen mineral classes and the algorithms were run iteratively 40 times. High calibration (> 95 %) and validation (> 90 %) accuracies were achieved with limited numbers (seven) of spectral bands selected by GA-SAM. Knowing the important band Positions will help scientist of HyspIRI group to place spectral bands at regions were accuracies of Earth compositional mapping can be enhanced.
Dos versos de Aristófanes: "Vesp". 480-481
Authors: Rodríguez Alfageme Ignacio
Published: June 2019

Los contextos y las connotaciones, propios de los términos que entran en juego en estos dos versos, permiten aclarar el chiste que se contiene en ellos, darles un sentido coherente y aceptar la tradición manuscrita en el primero de ambos versos.
El problema metodológico de la exégesis de las fuentes de la filosofía antigua: un caso práctico
Authors: Hermoso Félix María Jesús
Published: June 2019

El presente artículo se centra en el problema metodológico al que se enfrenta el historiador de la Filosofía Antigua. Muchas veces no queda claro el método a seguir a la hora de construir una exégesis seria y rigurosa, máxime cuando nos encontramos una aparente incongruencia en el sentido de pasajes de un mismo autor. En estos casos, la imagen que tenemos del autor puede guiar de antemano el modo en que leemos sus textos, filtrando la significación de conceptos clave. Trataremos de acercarnos a la cuestión del método desde uno de los aspectos posibles, aquel que pone especial cuidado y otorga especial relevancia al estudio semántico-estructural del léxico. Pondremos como ejemplo un caso práctico referido al De Mysteriis de Jámblico.
Prevención del consumo de tabaco en adolescentes en base a conductas motivacionales y el análisis de campañas en Chile
Authors: Castro Rocío , Castro Sujey
Published: June 2019

Los fumadores tienen una probabilidad dos veces mayor de morir en forma prematura en comparación con los individuos que no fuman. Un número creciente de enfermedades forman la lista actual de los daños a la salud causados por el tabaquismo1. Objetivo: El objetivo de este estudio está enfocado hacia la prevención del consumo de tabaco realizando un análisis de cuáles son las conductas que llevan al individuo específicamente en adolescentes, a dejar este hábito. Metodología: Fue en base a revisiones bibliográficas de artículos publicados en revistas científicas y de salud, desde el año 2000, teniendo como motor de búsqueda el consumo de tabaco y las motivaciones para dejarlo. Discusión: La misión de los profesionales de la salud no solo está enfocada a curar enfermedades sino que también a la prevención de éstas, y el consumo de tabaco es un hábito que aumenta los riesgos de contraer enfermedades1. Por lo tanto es de vital importancia saber cuál es la mejor forma para abordar la prevención contra el tabaquismo a edades tempranas, y llegar a un cambio de conducta saludable y radical. Conclusión: Las campañas antitabaco enfocadas a las motivaciones son positivas para la supresión del hábito de fumar, y pueden ser utilizadas como una herramienta para llevar a cabo la prevención de conductas no deseables, que llevan a enfermedades a futuro.
Modelo integral de salud con enfoque familiar y comunitario: experiencias en la implementación desde un equipo de atención hospitalaria
Authors: Cárdenas Consuelo , Pinninghoff Carolina
Published: June 2019

Esta investigación describe las experiencias de un equipo de atención hospitalaria en torno a la implementación del Modelo Integral de Salud Familiar y Comunitario. Estudio exploratorio de carácter cualitativo. Se realizaron 2 entrevistas grupales semi-estructuradas a 17 miembros del Equipo del Hospital Comunitario de Salud Familiar de El Carmen, provincia de Ñuble, los cuales se dividieron en dos grupos de 8 y 9 personas respectivamente. Los resultados señalan la relevancia de considerar en la Implementación del Modelo, Capacidad de organización del equipo, Autonomía en la toma de decisiones, Confianza del equipo en sus capacidades individuales y colectivas, Comprensión del Modelo de Salud Familiar y Convicción en la viabilidad de éste.
Nuevos escenarios para profesionales, trabajadores y usuarios de salud Post reforma AuGE-GEs Instituto de Aparato Locomotor, Universidad Austral de Chile, 30 y 31 de mayo 2013
Authors: Carrasco Jimena
Published: June 2019

Presentación: Dra. Jimena Carrasco, Universidad Austral de Chile; María Angélica Illanes, Universidad Austral de chile.Micro-logía de la reforma y la economización de la salud: Yuri carvajal, Universidad de ChileCambios generados por la implementación del AuGE-GEs en la atención de las patologías Insuficiencia Renal Crónica y Diabetes mellitus II, en la región del Bío-Bío, desde la perspectiva de los usuarios.; Cecilia Bustos, Universidad de ConcepciónEfectos e impactos cualitativos en la implementación del régimen GEs en la APs, Ricardo Oyarzún, Universidad Austral de ChileParticipación de: Claudio González, Servicio de Salud Valdivia; Mario Parada, Universidad de Valparaíso;
Abordaje cualitativo sobre la incorporación del enfoque de salud intercultural en la malla curricular de universidades chilenas relacionadas con zonas indígenas
Authors: Painemilla Adalguisa , Sanhueza Cruzat Gabriel , Vanegas López Jairo
Published: June 2019

En Chile, la Salud Intercultural es un tema emergente. Existen alrededor de 13 pueblos originarios, de los cuales solo ocho están reconocidos y valorados por la Ley Indígena 19.253. Estos son los aymara, quechua, atacameño, rapanui, koya, kawésqar, yamana y mapuche. A su vez, en estas áreas existen universidades públicas y privadas que ofrecen diferentes carreras en el área de la salud, preparando diferentes recursos humanos en estas zonas. Por tanto, la incorporación de la salud intercultural en la malla curricular de las universidades resulta relevante. Este estudio cualitativo se plantea conocer si la salud intercultural está o no incorporada dentro de la malla curricular en las instituciones del Consejo de Rectores de Universidades Chilenas que imparten carreras de la salud, como enfermería, kinesiología, medicina, nutrición y obstetricia en ocho universidades en las regiones primera, novena, decimoquinta y Metropolitana. Solo una universidad de ellas tiene incorporado el enfoque Salud Intercultural. Algunas universidades contemplan este enfoque en los objetivos de los programas aunque su desarrollo como concepto y como práctica es insuficiente.