Comparison of Vehicle Control Systems Based on Multiple Features

Herná,ndez, Danilo C&aacute,ceres,Seo, Dongwook,Chae, Hyunuk,Jo, Kang-Hyun Taylor Francis 2015 Cybernetics and systems Vol.46 No.1

An equatorial ultra iron-poor star identified in BOSS

Allende Prieto, C.,Fern&aacute,ndez-Alvar, E.,Aguado, D. S.,Gonz&aacute,lez Herná,ndez, J. I.,Rebolo, R.,Lee, Y. S.,Beers, T. C.,Rockosi, C. M.,Ge, J. EDP Sciences 2015 Astronomy and astrophysics Vol.579 No.-

Integrity, Orbit Determination and Time Synchronisation Algorithms for Galileo

M. M. Romay Merino,C. Herná,ndez Medel,J. R. Martí,n Piedelobo 한국항해항만학회 2006 한국항해항만학회 학술대회논문집 Vol.2 No.-

Galileo is the European Global Navigation Satellite System, under civilian control, and consists on a constellation of medium Earth orbit satellites and its associated ground infrastructure. Galileo will provide to their users highly accurate global positioning services and their associated integrity information. The elements in charge of the computation of Galileo navigation and integrity information are the OSPF (Orbit Synchronization Processing Facility) and IPF (Integrity Processing Facility), within the Galileo Ground Mission Segment (GMS). Navigation algorithms play a key role in the provision of the Galileo Mission, since they are responsible for computing the essential information the users need to calculate their position: the satellite ephemeris and clock offsets. Such information is generated in the Galileo Ground Mission Segment and broadcast by the satellites within the navigation signal, together with the expected a-priori accuracy (SISA: Signal-In-Space Accuracy), which is the parameter that in fault-free conditions makes the overbounding the predicted ephemeris and clock model errors for the Worst User Location. In parallel, the integrity algorithms of the GMS are responsible of providing a real-time monitoring of the satellite status with timely alarm messages in case of failures. The accuracy of the integrity monitoring system is characterized by the SISMA (Signal In Space Monitoring Accuracy), which is also broadcast to the users through the integrity message.

The pulsating hot subdwarf Balloon 090100001: results of the 2005 multisite campaign

Baran, A.,Oreiro, R.,Pigulski, A.,Herná,ndez, F. Pé,rez,Ulla, A.,Reed, M. D.,Rodrí,guez-Ló,pez, C.,Moskalik, P.,Kim, S.-L.,Chen, W.-P.,Crowe, R.,Siwak, M.,Armendarez, L.,Binder Blackwell Publishing Ltd 2009 MONTHLY NOTICES- ROYAL ASTRONOMICAL SOCIETY Vol.392 No.3

<P>ABSTRACT</P><P>We present the results of a multisite photometric campaign on the pulsating B-type hot subdwarf star Balloon 090100001 (Bal09). The star is one of the two known hybrid hot subdwarfs with both long- and short-period oscillations, theoretically attributed to <I>g</I> and <I>p</I> modes. The campaign involved eight telescopes with three obtaining <I>UBVR</I> data, four <I>B</I>-band data and one Strömgren <I>uvby</I> photometry. The campaign covered 48 nights, providing a temporal resolution of 0.36 μHz with a detection threshold of about 0.2 mmag in <I>B</I>-filter data.</P><P>Bal09 has the richest pulsation spectrum of any known pulsating subdwarf B star, and our analysis detected 114 frequencies including 97 independent and 17 combination ones. Most of the 24 <I>g</I>-mode frequencies are between 0.1 and 0.4 mHz. Of the remaining 73, presumably <I>p</I> modes, 72 group into four distinct regions near 2.8, 3.8, 4.7 and 5.5 mHz. The density of frequencies requires that some modes must have degrees ℓ larger than 2. The modes in the 2.8 mHz region have the largest amplitudes. The strongest mode (<I>f</I><SUB>1</SUB>) is most likely radial, while the remaining ones in this region form two nearly symmetric multiplets: a triplet and quintuplet, attributed to rotationally split ℓ= 1 and 2 modes, respectively. We find clear increases of splitting in both multiplets between the 2004 and 2005 observing campaigns, amounting to ∼15 per cent on average. The observed splittings imply that the rotational rate in Bal09 depends on stellar latitude and is the fastest on the equator. We also speculate on the possible reasons for the changes of splitting. The only plausible explanation we find is torsional oscillation. This hypothesis, however, needs to be verified in the future by detailed modelling. In this context, it is very important to monitor the splittings on a longer time-scale as their behaviour may help to explain this interesting phenomenon.</P><P>The amplitudes of almost all terms detected in both 2004 and 2005 were found to vary. This is evident even during one season; for example, amplitudes of modes <I>f</I><SUB>8</SUB> and <I>f</I><SUB>C</SUB> were found to change by a factor of 2–3 within about 50 d during 2005.</P><P>We use a small grid of models to constrain the main mode (<I>f</I><SUB>1</SUB>), which most likely represents the radial fundamental pulsation. The groups of <I>p</I>-mode frequencies appear to lie in the vicinity of the consecutive radial overtones, up to the third one. Despite the large number of <I>g</I>-mode frequencies observed, we failed to identify them, most likely because of the disruption of asymptotic behaviour by mode trapping. The observed frequencies were not, however, fully exploited in terms of seismic analysis which should be done in the future with a larger grid of reliable evolutionary models of hot subdwarfs.</P>

3D shape analysis of the brain's third ventricle using a midplane encoded symmetric template model

Kim, Jaeil,Valdé,s Herná,ndez, Maria del C.,Royle, Natalie A.,Maniega, Susana Muñ,oz,Aribisala, Benjamin S.,Gow, Alan J.,Bastin, Mark E.,Deary, Ian J.,Wardlaw, Joanna M.,Park, Jinah Elsevier Scientific Publishers 2016 COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE Vol.129 No.-

<▼1><P><B>Highlights</B></P><P>•<P>Present a model-based approach to investigate the morphology of the third ventricle.</P>•<P>Assess the regional deformations in relation to the atrophy of surrounding structures.</P>•<P>Use a symmetric template model with the midplane definition for unbiased analysis.</P>•<P>Achieve a robust surface modeling using a progressive surface deformation.</P>•<P>Validate the method on a healthy aging sample with different clinical variables.</P></P></▼1><▼2><P><B>Background</B></P><P>Structural changes of the brain's third ventricle have been acknowledged as an indicative measure of the brain atrophy progression in neurodegenerative and endocrinal diseases. To investigate the ventricular enlargement in relation to the atrophy of the surrounding structures, shape analysis is a promising approach. However, there are hurdles in modeling the third ventricle shape. First, it has topological variations across individuals due to the inter-thalamic adhesion. In addition, as an interhemispheric structure, it needs to be aligned to the midsagittal plane to assess its asymmetric and regional deformation.</P><P><B>Method</B></P><P>To address these issues, we propose a model-based shape assessment. Our template model of the third ventricle consists of a midplane and a symmetric mesh of generic shape. By mapping the template's midplane to the individuals’ brain midsagittal plane, we align the symmetric mesh on the midline of the brain before quantifying the third ventricle shape. To build the vertex-wise correspondence between the individual third ventricle and the template mesh, we employ a minimal-distortion surface deformation framework. In addition, to account for topological variations, we implement geometric constraints guiding the template mesh to have zero width where the inter-thalamic adhesion passes through, preventing vertices crossing between left and right walls of the third ventricle. The individual shapes are compared using a vertex-wise deformity from the symmetric template.</P><P><B>Results</B></P><P>Experiments on imaging and demographic data from a study of aging showed that our model was sensitive in assessing morphological differences between individuals in relation to brain volume (i.e. proxy for general brain atrophy), gender and the fluid intelligence at age 72. It also revealed that the proposed method can detect the regional and asymmetrical deformation unlike the conventional measures: volume (median 1.95 ml, IQR 0.96 ml) and width of the third ventricle. Similarity measures between binary masks and the shape model showed that the latter reconstructed shape details with high accuracy (Dice coefficient ≥0.9, mean distance 0.5 mm and Hausdorff distance 2.7 mm).</P><P><B>Conclusions</B></P><P>We have demonstrated that our approach is suitable to morphometrical analyses of the third ventricle, providing high accuracy and inter-subject consistency in the shape quantification. This shape modeling method with geometric constraints based on anatomical landmarks could be extended to other brain structures which require a consistent measurement basis in the morphometry.</P></▼2>

Active tailoring of nanoantenna plasmonic fields using few-cycle laser pulses

Choi, S.,Ciappina, M. F.,Pé,rez-Herná,ndez, J. A.,Landsman, A. S.,Kim, Y.-J.,Kim, S. C.,Kim, D. American Physical Society 2016 Physical Review A Vol.93 No.2

<P>Plasmonic nanoatennas are a versatile tool for coherently manipulating light on a nanoscale by confining electric fields of the driving laser into subwavelength volumes, thereby significantly enhancing electric near fields. It is normally assumed that the time-dependent spectral properties of these near fields are independent of the duration of the driving laser pulse. Here we show that when a few-cycle laser pulse shines on a bow-tie nanoantenna, its spectral properties are dramatically modified, as evidenced by a large shift of the center wavelength of the near field, relative to the driving laser. In addition, for certain geometries, a second color appears in the near field, creating conditions for generation of an isolated attosecond pulse at megahertz repetition rate. Our results open the door to frequency-tunable ultrafast sources at nanometer scale without tuning the frequency of the driving laser.</P>

Similar worldwide patterns in the sex pheromone signal and response in the oriental fruit moth, <i>Grapholita molesta</i> (Lepidoptera: Tortricidae)

Knight, A.L.,Barros-Parada, W.,Bosch, D.,Escudero-Colomar, L.A.,Fuentes-Contreras, E.,Herná,ndez-S&aacute,nchez, J.,Yung, C.,Kim, Y.,Kovanci, O.B.,Levi, A.,Lo, P.,Molinari, F.,Valls, J.,Gemeno, Cambridge University Press 2015 Bulletin of entomological research Vol.105 No.1

<B>Abstract</B><P>The response of <I>Grapholita molesta</I> (Busck) males to three-component sex pheromone blends containing a 100% ratio of the major sex pheromone component, (<I>Z</I>)-8-dodecenyl acetate and a 10% ratio of (<I>Z</I>)-8-dodecenol, but with varying ratios of (<I>E</I>)-8-dodecenyl acetate (0.4, 5.4, 10.4, 30.4, and 100.1% <I>E</I>-blends) was tested with populations in eight stone and pome fruit orchards in Europe, Asia, and North and South America. Traps baited with the 5.4% <I>E</I>-blend caught significantly more males than traps with any other blend with all populations. Significantly more males were caught in traps baited with the 10.4% <I>E</I>-blend than in traps with the remaining blends, except with the 0.4% <I>E-</I>blend in Turkey. Significant differences in male moth catches occurred between the other blends with the 0.4>30.4% <I>E-</I>blend, and the 30.4>100.1% <I>E-</I>blend. Male moth catches with the 100.1% <I>E</I>-blend only differed from the hexane control in Chile. No apparent differences were noted to these blends in populations collected from pome or stone fruits. Flight tunnel assays to synthetic blends with a subset of populations were similar to the field results, but the breadth of the most attractive <I>E-</I>blends was wider. Flight tunnel assays also demonstrated a high level of male-female cross-attraction among field-collected populations. Female gland extracts from field-collected populations did not show any significant variation in their three-component blends. The only exceptions in these assays were that long-term laboratory populations were less responsive and attractive, and produced different blend ratios of the two minor components than recently collected field populations.</P>

Removal of contaminants of emerging concern by metal-organic framework nanoadsorbents: A review

Joseph, Lesley,Jun, Byung-Moon,Jang, Min,Park, Chang Min,Muñ,oz-Senmache, Juan C.,Herná,ndez-Maldonado, Arturo J.,Heyden, Andreas,Yu, Miao,Yoon, Yeomin Elsevier 2019 CHEMICAL ENGINEERING JOURNAL -LAUSANNE- Vol.369 No.-

<P><B>Abstract</B></P> <P>Over the last two decades, various contaminants of emerging concern (CECs), such as endocrine disrupting compounds, along with pharmaceuticals and personal care products (PPCPs), have been of interest to the water industry because of their incomplete removal during the typical water and wastewater treatment processes. Recently, the potential environmental applications of metal-organic frameworks (MOFs) and MOF-based nanoadsorbents (MOF-NAs) have been widely studied. In particular, the use of these nanoadsorbents for CECs in water and wastewater treatment processes has been a rapidly growing area of interest in the recent literature due to their unique physicochemical properties. Therefore, it is necessary to understand the adsorption phenomena of various CECs by MOF-NAs, particularly because the physicochemical properties of various CECs create unique challenges for the removal of these compounds from water. In addition, the adsorption of CECs on MOF-NAs is significantly influenced by the physicochemical properties of the MOF-NAs and the water quality conditions. Therefore, this review provides a comprehensive assessment of recent studies on the removal of various CECs (<I>e.g</I>., analgesics, antibiotics, antiepileptics, antiseptics, and etc.) with different physicochemical properties by various MOF-NAs under various water quality conditions (<I>e.g</I>., pH, background ions/ionic strength, natural organic matter, and temperature). In addition, this review briefly discusses the recent literature on the synthesis of MOF-NAs, regeneration of MOF-NAs, and removal of CECs during water and wastewater treatment processes.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Removal of contaminants of emerging concern by MOF nanoadsorbents was comprehensively reviewed. </LI> <LI> Comprehensively information was provided for applications of MOF nanoadsorbents in water industry. </LI> <LI> Areas of future research for the removal of various contaminants in MOF nanoadsorbents were suggested. </LI> </UL> </P>

Probing leptogenesis

Chun, E. J.,Cvetič,, G.,Dev, P. S. B.,Drewes, M.,Fong, C. S.,Garbrecht, B.,Hambye, T.,Harz, J.,Herná,ndez, P.,Kim, C. S.,Molinaro, E.,Nardi, E.,Racker, J.,Rius, N.,Zamora-Saa, J. World Scientific Publishing Company 2018 International journal of modern physics. A, Partic Vol.33 No.6

<P>The focus of this paper lies on the possible experimental tests of leptogenesis scenarios. We consider both leptogenesis generated from oscillations, as well as leptogenesis from out-of-equilibrium decays. As the Akhmedov-Rubakov-Smirnov (ARS) mechanism allows for heavy neutrinos in the GeV range, this opens up a plethora of possible experimental tests, e.g. at neutrino oscillation experiments, neutrinoless double beta decay, and direct searches for neutral heavy leptons at future facilities. In contrast, testing leptogenesis from out-of-equilibrium decays is a quite difficult task. We comment on the necessary conditions for having successful leptogenesis at the TeV-scale. We further discuss possible realizations and their model specific testability in extended seesaw models, models with extended gauge sectors, and supersymmetric leptogenesis. Not being able to test high-scale leptogenesis directly, we present a way to falsify such scenarios by focusing on their washout processes. This is discussed specifically for the left-right symmetric model and the observation of a heavy <TEX>$ W_{R}$</TEX>, as well as model independently when measuring <TEX>$ \Updelta L = 2$</TEX> washout processes at the LHC or neutrinoless double beta decay.</P>