Search Results - "Helmer, H"

An automatic method for screening clouds and cloud shadows in optical satellite image time series in cloudy regions by Zhu, Xiaolin, Helmer, Eileen H.

“…Clouds and cloud shadows block land surface information in optical satellite images. Accurate detection of clouds and cloud shadows can help exclude these…”
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Grain structure evolution in Inconel 718 during selective electron beam melting by Helmer, H., Bauereiß, A., Singer, R.F., Körner, C.

“…Selective electron beam melting (SEBM) is an additive manufacturing method where complex parts are built from metal powders in layers of typically 50µm. An…”
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The merger that led to the formation of the Milky Way’s inner stellar halo and thick disk by Helmi, Amina, Babusiaux, Carine, Koppelman, Helmer H., Massari, Davide, Veljanoski, Jovan, Brown, Anthony G. A.

“…The assembly of our Galaxy can be reconstructed using the motions and chemistry of individual stars 1,2 . Chemo-dynamical studies of the stellar halo near the…”
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Hidden deep in the halo: selection of a reduced proper motion halo catalogue and mining retrograde streams in the velocity space by Viswanathan, Akshara, Starkenburg, Else, Koppelman, Helmer H, Helmi, Amina, Balbinot, Eduardo, Esselink, Anna F

“…ABSTRACT The Milky Way halo is one of the few galactic haloes that provides a unique insight into galaxy formation by resolved stellar populations. Here, we…”
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Galactic potential constraints from clustering in action space of combined stellar stream data by Reino, Stella, Rossi, Elena M, Sanderson, Robyn E, Sellentin, Elena, Helmi, Amina, Koppelman, Helmer H, Sharma, Sanjib

“…ABSTRACT Stream stars removed by tides from their progenitor satellite galaxy or globular cluster act as a group of test particles on neighbouring orbits,…”
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Bringing an ecological view of change to Landsat-based remote sensing by Kennedy, Robert E, Andréfouët, Serge, Cohen, Warren B, Gómez, Cristina, Griffiths, Patrick, Hais, Martin, Healey, Sean P, Helmer, Eileen H, Hostert, Patrick, Lyons, Mitchell B, Meigs, Garrett W, Pflugmacher, Dirk, Phinn, Stuart R, Powell, Scott L, Scarth, Peter, Sen, Susmita, Schroeder, Todd A, Schneider, Annemarie, Sonnenschein, Ruth, Vogelmann, James E, Wulder, Michael A, Zhu, Zhe

“…When characterizing the processes that shape ecosystems, ecologists increasingly use the unique perspective offered by repeat observations of remotely sensed…”
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The Pristine survey IV: approaching the Galactic metallicity floor with the discovery of an ultra-metal-poor star by Starkenburg, Else, Aguado, David S, Bonifacio, Piercarlo, Caffau, Elisabetta, Jablonka, Pascale, Lardo, Carmela, Martin, Nicolas, Sánchez-Janssen, Rubén, Sestito, Federico, Venn, Kim A, Youakim, Kris, Allende Prieto, Carlos, Arentsen, Anke, Gentile, Marc, González Hernández, Jonay I, Kielty, Collin, Koppelman, Helmer H, Longeard, Nicolas, Tolstoy, Eline, Carlberg, Raymond G, Côté, Patrick, Fouesneau, Morgan, Hill, Vanessa, McConnachie, Alan W, Navarro, Julio F

“…The early Universe presented a star formation environment that was almost devoid of heavy elements. The lowest metallicity stars thus provide a unique window…”
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Erratum: Galactic potential constraints from clustering in action space of combined stellar stream data by Reino, Stella, Rossi, Elena M, Sanderson, Robyn E, Sellentin, Elena, Helmi, Amina, Koppelman, Helmer H, Sharma, Sanjib

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Age determination of galaxy merger remnant stars using asteroseismology by Borre, Camilla C, Aguirre Børsen-Koch, Víctor, Helmi, Amina, Koppelman, Helmer H, Nielsen, Martin B, Rørsted, Jakob L, Stello, Dennis, Stokholm, Amalie, Winther, Mark L, Davies, Guy R, Hon, Marc, Kruijssen, J M Diederik, Laporte, Chervin F P, Reyes, Claudia, Yu, Jie

“…ABSTRACT The Milky Way was shaped by the mergers with several galaxies in the past. We search for remnant stars that were born in these foreign galaxies and…”
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Multiscale predictors of small tree survival across a heterogeneous tropical landscape by Helmer, Eileen H, Kay, Shannon, Marcano-Vega, Humfredo, Powers, Jennifer S, Wood, Tana E, Zhu, Xiaolin, Gwenzi, David, Ruzycki, Thomas S

“…Uncertainties about controls on tree mortality make forest responses to land-use and climate change difficult to predict. We tracked biomass of tree functional…”
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Preterm Labor and Birth Management: Recommendations from the European Association of Perinatal Medicine by Di Renzo, G. C., Cabero Roura, L., Facchinetti, F., Helmer, H., Hubinont, C., Jacobsson, B., Jørgensen, J. S., Lamont, R. F., Mikhailov, A., Papantoniou, N., Radzinsky, V., Shennan, A., Ville, Y., Wielgos, M., Visser, G. H. A.

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Preterm neonates display altered plasmacytoid dendritic cell function and morphology by Schüller, S. S., Sadeghi, K., Wisgrill, Lukas, Dangl, A., Diesner, S. C., Prusa, A. R., Klebermasz‐Schrehof, K., Greber‐Platzer, S., Neumüller, J., Helmer, H., Husslein, P., Pollak, A., Spittler, A., Förster‐Waldl, E.

“…Functionality and morphology of pDCs of preterm newborns, with emphasis on TLR9 triggered IFN‐α production. Bacterial and viral infections cause high rates of…”
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Mapping the climate of Puerto Rico, Vieques and Culebra by Daly, Christopher, Helmer, E. H., Quiñones, Maya

“…Spatially explicit climate data contribute to watershed resource management, mapping vegetation type with satellite imagery, mapping present and hypothetical…”
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Characterization of Dry-Season Phenology in Tropical Forests by Reconstructing Cloud-Free Landsat Time Series by Zhu, Xiaolin, Helmer, Eileen H., Gwenzi, David, Collin, Melissa, Fleming, Sean, Tian, Jiaqi, Marcano-Vega, Humfredo, Meléndez-Ackerman, Elvia J., Zimmerman, Jess K.

“…Fine-resolution satellite imagery is needed for characterizing dry-season phenology in tropical forests since many tropical forests are very spatially…”
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Root biomass allocation in the world's upland forests by Cairns, M.A, Brown, S, Helmer, E.H, Baumgardner, G.A

“…Because the world's forests play a major role in regulating nutrient and carbon cycles, there is much interest in estimating their biomass. Estimates of…”
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Commentary on a combined approach to the problem of developing biomarkers for the prediction of spontaneous preterm labor that leads to preterm birth by Lamont, R.F., Richardson, L.S., Boniface, J.J., Cobo, T., Exner, M.M., Christensen, I.B., Forslund, S.K., Gaba, A., Helmer, H., Jørgensen, J.S., Khan, R.N., McElrath, T.F., Petro, K., Rasmussen, M., Singh, R., Tribe, R.M., Vink, J.S., Vinter, C.A., Zhong, N., Menon, R.

“…Globally, preterm birth has replaced congenital malformation as the major cause of perinatal mortality and morbidity. The reduced rate of congenital…”
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Detailed maps of tropical forest types are within reach: Forest tree communities for Trinidad and Tobago mapped with multiseason Landsat and multiseason fine-resolution imagery by Helmer, E.H., Ruzycki, Thomas S., Benner, Jay, Voggesser, Shannon M., Scobie, Barbara P., Park, Courtenay, Fanning, David W., Ramnarine, Seepersad

“…► Tropical tree floristic associations were mapped with multiseason, gap-filled Landsat imagery. ► Multiseason high-resolution imagery identified many among a…”
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Mapping U.S. forest biomass using nationwide forest inventory data and moderate resolution information by Blackard, J.A., Finco, M.V., Helmer, E.H., Holden, G.R., Hoppus, M.L., Jacobs, D.M., Lister, A.J., Moisen, G.G., Nelson, M.D., Riemann, R., Ruefenacht, B., Salajanu, D., Weyermann, D.L, Winterberger, K.C., Brandeis, T.J., Czaplewski, R.L., McRoberts, R.E., Patterson, P.L., Tymcio, R.P.

“…A spatially explicit dataset of aboveground live forest biomass was made from ground measured inventory plots for the conterminous U.S., Alaska and Puerto…”
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Mapping tropical dry forest height, foliage height profiles and disturbance type and age with a time series of cloud-cleared Landsat and ALI image mosaics to characterize avian habitat by Helmer, E.H., Ruzycki, Thomas S., Wunderle, Joseph M., Vogesser, Shannon, Ruefenacht, Bonnie, Kwit, Charles, Brandeis, Thomas J., Ewert, David N.

“…Remote sensing of forest vertical structure is possible with lidar data, but lidar is not widely available. Here we map tropical dry forest height (RMSE = 0.9…”
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Continuing challenges in treating preterm labour: preterm prelabour rupture of the membranes by Helmer, H

“…Preterm prelabour rupture of the membranes (PPROM) is defined as prelabour rupture of the membranes prior to 37 weeks of gestation. It occurs in approximately…”
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