Resultados de Búsqueda por Autor

1

artículo

A combined view on precipitation and temperature climatology and trends in the southern Andes of Peru

Publicado por
Imfeld, Noemi, Sedlmeier, Katrin, Gubler, Stefanie, Correa, Kris, Davila Arriaga, Cristina, Huerta, Adrian, Lavado-Casimiro, W., Rohrer, M., Scherrer, Simon C., Schwierz, Cornelia

Publicado 2020

Enlace

In the southern Peruvian Andes, communities are highly dependent on climatic conditions due to the mainly rain-fed agriculture and the importance of glaciers and snow melt as a freshwater resource. Longer-term trends and year-to-year variability of precipitation or temperature severely affect living conditions. This study evaluates seasonal precipitation and temperature climatologies and trends in the period 1965/66–2017/18 for the southern Peruvian Andes using quality-controlled and homogenized station data and new observational gridded data. In this region, precipitation exhibits a strong annual cycle with very dry winter months and most of the precipitation falling from spring to autumn. Spatially, a northeast–southwest gradient in austral spring is observed, related to an earlier start of the rainy season in the northeastern part of the study area. Seasonal variations of maximum ...

2

objeto de conferencia

Spatio-temporal temperature and precipitation patterns in the southern Peruvian Andes - insights from the Climandes project

Publicado por
Spirig, C., Stefanie, Gubler, Avalos, Grinia, Huerta, Adrian, Imfeld, Noemi, Lavado-Casimiro, W., Oria, Clara, Quevedo Caiña, Karim, Rohrer, Mario, Scherrer, Simon C., Sedlmeier, Katrin, Schwierz, Cornelia

Publicado 2020

Enlace

In the southern Peruvian Andes, climatic threats such as water scarcity or frost pose major challenges for agriculture. Such events may result in severe yield losses threatening the livelihood of smallholder farmers due to missing adaptive and coping strategies. Knowledge on climate variability and change, on the current state of the climate, as well as short- to midrange predictions potentially improve the farmers’ risk management. However, such knowledge is only partly available and often does not reach rural communities. Climandes, a pilot project of the Global Framework for Climate Services, tackled these shortcomings through the enhancement of climatological observations, the production of gridded datasets using satellite and station observations, the verification of seasonal forecasts to determine their usefulness for small-scale applications, and through the establishment of com...

3

artículo

Arachne-A web-based event viewer for MINERvA

Publicado por
Tagg, N, Brangham, J, Chvojka, J, Clairemont, M, Day, M, Eberly, B, Felix, J, Fields, L, Gago, AM, Gran, R, Harris, DA, Kordosky, M, Lee, H, Maggi, G, Maher, E, Mann, WA, Marshall, CM, McFarland, KS, McGowan, AM, Mislivec, A, Mousseau, J, Osmanov, B, Osta, J, Paolone, V, Perdue, G, Ransome, RD, Ray, H, Schellman, H, Schmitz, DW, Simon, C, Salinas, CJS, Tice, BG, Walding, J, Walton, T, Wolcott, J, Zhang, D, Ziemer, BP

Publicado 2012

Enlace

Neutrino interaction events in the detector are visually represented with a web-based tool called Arachne. Data are retrieved from a central server via AJAX, and client-side JavaScript draws images into the user's browser window using the draft HTML 5 standard. These technologies allow neutrino interactions to be viewed by anyone with a web browser, allowing for easy hand-scanning of particle interactions. Arachne has been used in to evaluate neutrino data in a prototype detector, to tune reconstruction algorithms, and for public outreach and education.

4

artículo

Arachne-A web-based event viewer for MINERνA

Publicado por
Tagg N., Brangham J., Chvojka J., Clairemont M., Day M., Eberly B., Felix J., Fields L., Gago A.M., Gran R., Harris D.A., Kordosky M., Lee H., Maggi G., Maher E., Mann W.A., Marshall C.M., McFarland K.S., McGowan A.M., Mislivec A., Mousseau J., Osmanov B., Osta J., Paolone V., Perdue G., Ransome R.D., Ray H., Schellman H., Schmitz D.W., Simon C., Solano Salinas C.J., Tice B.G., Walding J., Walton T., Wolcott J., Zhang D., Ziemer B.P.

Publicado 2012

Enlace

Neutrino interaction events in the MINERνA detector are visually represented with a web-based tool called Arachne. Data are retrieved from a central server via AJAX, and client-side JavaScript draws images into the users browser window using the draft HTML 5 "standard". These technologies allow neutrino interactions to be viewed by anyone with a web browser, allowing for easy hand-scanning of particle interactions. Arachne has been used in MINERνA to evaluate neutrino data in a prototype detector, to tune reconstruction algorithms, and for public outreach and education. © 2012 Published by Elsevier B.V.

5

artículo

Cross sections for nu(mu) and (nu)over-bar(mu) induced pion production on hydrocarbon in the few-GeV region using MINERvA

Publicado por
McGivern, CL, Le, T, Eberly, B, Aliaga, L, Altinok, O, Bellantoni, L, Bercellie, A, Betancourt, M, Bodek, A, Bravar, A, Budd, H, Cai, T, Carneiro, MF, Christy, ME, da Motta, H, Dytman, SA, Diaz, GA, Endress, E, Felix, J, Fields, L, Fine, R, Galindo, R, Gallagher, H, Golan, T, Gran, R, Harris, DA, Higuera, A, Hurtado, K, Kiveni, M, Kleykamp, J, Kordosky, M, Maher, E, Manly, S, Mann, WA, Marshall, CM, Caicedo, DAM, McFarland, KS, McGowan, AM, Messerly, B, Miller, J, Mislivec, A, Morfin, JG, Mousseau, J, Naples, D, Nelson, JK, Norrick, A, Nuruzzaman, Paolone, V, Park, J, Patrick, CE, Perdue, GN, Rakotondravohitra, L, Ramirez, MA, Ransome, RD, Ray, H, Ren, L, Rimal, D, Rodrigues, PA, Ruterbories, D, Schellman, H, Schmitz, DW, Simon, C, Salinas, CJS, Falero, SS, Tice, BG, Valencia, E, Walton, T, Wolcott, J, Wospakrik, M, Zhang, D

Publicado 2016

Enlace

This work was supported by the Fermi National Accelerator Laboratory under U.S. Department of Energy Contract No. DE-AC02-07CH11359 which included the MINERvA construction project. Construction support was also granted by the United States National Science Foundation under Award No. PHY-0619727 and by the University of Rochester. Support for participating scientists was provided by NSF and DOE (U.S.A.), by CAPES and CNPq (Brazil), by CoNaCyT (Mexico), by CONICYT (Chile), by CONCYTEC, DGI-PUCP and IDI/IGI-UNI (Peru), and by Latin American Center for Physics (CLAF). We thank the MINOS Collaboration for use of its near detector data. We acknowledge the dedicated work of the Fermilab staff responsible for the operation and maintenance of the beam line and detector, and we thank the Fermilab Computing Division for support of data processing.

6

artículo

Measurement of muon plus proton final states in nu(mu) interactions on hydrocarbon at < E-nu >=4.2 GeV

Publicado por
Walton, T, Betancourt, M, Aliaga, L, Altinok, O, Bodek, A, Bravar, A, Budd, H, Bustamante, MJ, Butkevich, A, Caicedo, DAM, Carneiro, MF, Castromonte, CM, Christy, ME, Chvojka, J, da Motta, H, Datta, M, Devan, J, Dytman, SA, Diaz, GA, Eberly, B, Felix, J, Fields, L, Fine, R, Fiorentini, GA, Gago, AM, Gallagher, H, Gran, R, Harris, DA, Higuera, A, Hurtado, K, Kleykamp, J, Kordosky, M, Kulagin, SA, Le, T, Maher, E, Manly, S, Mann, WA, Marshall, CM, Mari, CM, McFarland, KS, McGivern, CL, McGowan, AM, Messerly, B, Miller, J, Mislivec, A, Morfin, JG, Mousseau, J, Muhlbeier, T, Naples, D, Nelson, JK, Norrick, A, Osta, J, Paolone, V, Park, J, Patrick, CE, Perdue, GN, Rakotondravohitra, L, Ransome, RD, Ray, H, Ren, L, Rodrigues, PA, Ruterbories, D, Schellman, H, Schmitz, DW, Simon, C, Snider, FD, Sobczyk, JT, Salinas, CJS, Tagg, N, Tice, BG, Valencia, E, Wolcott, J, Wospakrik, M, Zavala, G, Zhang, D, Ziemer, BP

Publicado 2015

Enlace

A study of charged-current muon neutrino scattering on hydrocarbon (CH) in which the final state includes a muon, at least one proton, and no pions is presented. Although this signature has the topology of neutrino quasielastic scattering from neutrons, the event sample contains contributions from quasielastic and inelastic processes where pions are absorbed in the nucleus. The analysis accepts events with muon production angles up to 70◦ and proton kinetic energies greater than 110 MeV. The cross section, when based completely on hadronic kinematics, is well-described by a relativistic Fermi gas nuclear model including the neutrino event generator modeling for inelastic processes and particle transportation through the nucleus. This is in contrast to the quasielastic cross section based on muon kinematics, which is best described by an extended model that incorporates multi-nucleon co...

7

artículo

Measurement of Ratios of nu(mu) Charged-Current Cross Sections on C, Fe, and Pb to CH at Neutrino Energies 2-20 GeV

Publicado por
Tice, BG, Datta, M, Mousseau, J, Aliaga, L, Altinok, O, Sazo, MGB, Betancourt, M, Bodek, A, Bravar, A, Brooks, WK, Budd, H, Bustamante, MJ, Butkevich, A, Caicedo, DAM, Castromonte, CM, Christy, ME, Chvojka, J, da Motta, H, Devan, J, Dytman, SA, Diaz, GA, Eberly, B, Felix, J, Fields, L, Fiorentini, GA, Gago, AM, Gallagher, H, Gran, R, Harris, DA, Higuera, A, Hurtado, K, Jerkins, M, Kafka, T, Kordosky, M, Kulagin, SA, Le, T, Maggi, G, Maher, E, Manly, S, Mann, WA, Marshall, CM, Mari, CM, McFarland, KS, McGivern, CL, McGowan, AM, Miller, J, Mislivec, A, Morfin, JG, Muhlbeier, T, Naples, D, Nelson, JK, Norrick, A, Osta, J, Palomino, JL, Paolone, V, Park, J, Patrick, CE, Perdue, GN, Rakotondravohitra, L, Ransome, RD, Ray, H, Ren, L, Rodrigues, PA, Savage, DG, Schellman, H, Schmitz, DW, Simon, C, Snider, FD, Salinas, CJS, Tagg, N, Valencia, E, Velasquez, JP, Walton, T, Wolcott, J, Zavala, G, Zhang, D, Ziemer, BP

Publicado 2014

Enlace

This work was supported by the Fermi National Accelerator Laboratory under U.S. Department of Energy Contract No. DE-AC02-07CH11359 which included the MINERvA construction project. Construction support also was granted by the United States National Science Foundation under Grant No. PHY-0619727 and by the University of Rochester. Support for participating scientists was provided by NSF and DOE (USA) by CAPES and CNPq (Brazil), by CoNaCyT (Mexico), by CONICYT (Chile), by CONCYTEC, DGI-PUCP and IDI/IGI-UNI (Peru), by Latin American Center for Physics (CLAF), by the Swiss National Science Foundation, and by RAS and the Russian Ministry of Education and Science (Russia). We thank the MINOS Collaboration for use of its near detector data. Finally, we thank the staff of Fermilab for support of the beam line and detector.

8

artículo

Measurement of K+ production in charged-current nu(mu) interactions

Publicado por
Marshall, CM, Aliaga, L, Altinok, O, Bellantoni, L, Bercellie, A, Betancourt, M, Bodek, A, Bravar, A, Budd, H, Cai, T, Carneiro, MF, Chvojka, J, da Motta, H, Devan, J, Dytman, SA, Diaz, GA, Eberly, B, Endress, E, Felix, J, Fields, L, Filkins, A, Fine, R, Gago, AM, Galindo, R, Gallagher, H, Ghosh, A, Golan, T, Gran, R, Griswold, S, Harris, DA, Higuera, A, Hurtado, K, Kiveni, M, Kleykamp, J, Kordosky, M, Le, T, Maher, E, Majoros, I, Manly, S, Mann, WA, Caicedo, DAM, McFarland, KS, McGivern, CL, McGowan, AM, Messerly, B, Miller, J, Mislivec, A, Morfin, JG, Mousseau, J, Naples, D, Nelson, JK, Norrick, A, Osta, J, Paolone, V, Park, J, Patrick, CE, Perdue, GN, Rakotondravohitra, L, Ramirez, MA, Ransome, RD, Ray, H, Ren, L, Rimal, D, Rodrigues, PA, Rosenberg, M, Ruterbories, D, Schellman, H, Schmitz, DW, Shadler, LA, Simon, C, Salinas, CJS, Sanchez, SF, Tice, BG, Valencia, E, Walton, T, Wang, Z, Watkins, P, Wiley, K, Wolcott, J, Wospakrik, M, Zhang, D

Publicado 2016

Enlace

This work was supported by the Fermi National Accelerator Laboratory under U.S. Department of Energy Contract No. DE-AC02-07CH11359 which included the MINERvA construction project. Construction support was also granted by the United States National Science Foundation under Award No. PHY-0619727 and by the University of Rochester. Support for participating scientists was provided by NSF and DOE (USA), by CAPES and CNPq (Brazil), by CoNaCyT (Mexico), by CONICYT (Chile), by CONCYTEC, DGI-PUCP and IDI/IGI-UNI (Peru), and by Latin American Center for Physics (CLAF). We thank the MINOS Collaboration for use of its near detector data. We acknowledge the dedicated work of the Fermilab staff responsible for the operation and maintenance of the NuMI beamline, MINERvA and MINOS detectors and the physical and software environments that support scientific computing at Fermilab.

9

artículo

Charged pion production in nu(mu) interactions on hydrocarbon at < E-nu >=4.0 GeV

Publicado por
Eberly, B, Aliaga, L, Altinok, O, Sazo, MGB, Bellantoni, L, Betancourt, M, Bodek, A, Bravar, A, Budd, H, Bustamante, MJ, Butkevich, A, Caicedo, DAM, Carneiro, MF, Christy, ME, Chvojka, J, da Motta, H, Datta, M, Devan, J, Diaz, GA, Dytman, SA, Felix, J, Fields, L, Fine, R, Fiorentini, GA, Gago, AM, Galindo, R, Gallagher, H, Golan, T, Gran, R, Harris, DA, Higuera, A, Hurtado, K, Kafka, T, Kleykamp, J, Kordosky, M, Le, T, Maher, E, Manly, S, Mann, WA, Marshall, CM, McFarland, KS, McGivern, CL, McGowan, AM, Messerly, B, Miller, J, Mislivec, A, Morfin, JG, Mousseau, J, Muhlbeier, T, Naples, D, Nelson, JK, Norrick, A, Osta, J, Palomino, JL, Paolone, V, Park, J, Patrick, CE, Perdue, GN, Rakotondravohitra, L, Ramirez, MA, Ransome, RD, Ray, H, Ren, L, Rodrigues, PA, Ruterbories, D, Salazar, G, Schellman, H, Schmitz, DW, Simon, C, Sobczyk, JT, Salinas, CJS, Tagg, N, Tice, BG, Valencia, E, Walton, T, Wolcott, J, Wospakrik, M, Zavala, G, Zegarra, A, Zhang, D, Ziemer, BP

Publicado 2015

Enlace

This work was supported by the Fermi National Accelerator Laboratory under the U.S. Department of Energy (DOE) Award No. DE-AC02-07CH11359 which included the MINERvA construction project. Construction support also was granted by the United States National Science Foundation under Grant No. PHY-0619727 and by the University of Rochester. Support for participating scientists was provided by the NSF and DOE (USA); CAPES and CNPq (Brazil); CoNaCyT (Mexico); CONICYT (Chile); CONCYTEC, DGI-PUCP and IDI/IGI-UNI (Peru); Latin American Center for Physics (CLAF); the Swiss National Science Foundation; and RAS and the Russian Ministry of Education and Science (Russia). We thank the MINOS Collaboration for use of its near detector data. Finally, we thank the staff of Fermilab for support of the beam line and detector.

10

artículo

Measurement of Muon Neutrino Quasielastic Scattering on a Hydrocarbon Target at E-v similar to 3.5 GeV

Publicado por
Fiorentini, GA, Schmitz, DW, Rodrigues, PA, Aliaga, L, Altinok, O, Baldin, B, Baumbaugh, A, Bodek, A, Boehnlein, D, Boyd, S, Bradford, R, Brooks, WK, Budd, H, Butkevich, A, Caicedo, DAM, Castromonte, CM, Christy, ME, Chung, H, Chvojka, J, Clark, M, da Motta, H, Damiani, DS, Danko, I, Datta, M, Day, M, DeMaat, R, Devan, J, Draeger, E, Dytman, SA, Diaz, GA, Eberly, B, Edmondson, DA, Felix, J, Fields, L, Fitzpatrick, T, Gago, AM, Gallagher, H, George, CA, Gielata, JA, Gingu, C, Gobbi, B, Gran, R, Grossman, N, Hanson, J, Harris, DA, Heaton, J, Higuera, A, Howley, IJ, Hurtado, K, Jerkins, M, Kafka, T, Kaisen, J, Kanter, MO, Keppel, CE, Kilmer, J, Kordosky, M, Krajeski, AH, Kulagin, SA, Le, T, Lee, H, Leister, AG, Locke, G, Maggi, G, Maher, E, Manly, S, Mann, WA, Marshall, CM, McFarland, KS, McGivern, CL, McGowan, AM, Mislivec, A, Morfin, JG, Mousseau, J, Naples, D, Nelson, JK, Niculescu, G, Niculescu, I, Ochoa, N, O'Connor, CD, Olsen, J, Osmanov, B, Osta, J, Palomino, JL, Paolone, V, Park, J, Patrick, CE, Perdue, GN, Pena, C, Rakotondravohitra, L, Ransome, RD, Ray, H, Ren, L, Rude, C, Sassin, KE, Schellman, H, Schneider, RM, Schulte, EC, Simon, C, Snider, FD, Snyder, MC, Sobczyk, JT

Publicado 2013

Enlace

This work was supported by the Fermi National Accelerator Laboratory under United States Department of Energy (DOE) Office of High Energy Physics Contract No. DE-AC02-07CH11359 which included the MINERvA construction project. Construction support also was granted by the United States National Science Foundation (NSF) under Grant No. PHY-0619727 and by the University of Rochester. Support for participating scientists was provided by NSF and DOE (USA) by CAPES and CNPq (Brazil), by CoNaCyT (Mexico), by CONICYT (Chile), by CONCYTEC, DGI-PUCP, and IDI/IGI-UNI (Peru), by Latin American Center for Physics (CLAF) and by RAS and the Russian Ministry of Education and Science (Russia). We thank the MINOS Collaboration for use of its near detector data. Finally, we thank the staff of Fermilab for support of the beam line and detector.

11

artículo

Measurement of Muon Antineutrino Quasielastic Scattering on a Hydrocarbon Target at E-v similar to 3.5 GeV

Publicado por
Fields, L, Chvojka, J, Aliaga, L, Altinok, O, Baldin, B, Baumbaugh, A, Bodek, A, Boehnlein, D, Boyd, S, Bradford, R, Brooks, WK, Budd, H, Butkevich, A, Caicedo, DAM, Castromonte, CM, Christy, ME, Chung, H, Clark, M, da Motta, H, Damiani, DS, Danko, I, Datta, M, Day, M, DeMaat, R, Devan, J, Draeger, E, Dytman, SA, Diaz, GA, Eberly, B, Edmondson, DA, Felix, J, Fitzpatrick, T, Fiorentini, GA, Gago, AM, Gallagher, H, George, CA, Gielata, JA, Gingu, C, Gobbi, B, Gran, R, Grossman, N, Hanson, J, Harris, DA, Heaton, J, Higuera, A, Howley, IJ, Hurtado, K, Jerkins, M, Kafka, T, Kaisen, J, Kanter, MO, Keppel, CE, Kilmer, J, Kordosky, M, Krajeski, AH, Kulagin, SA, Le, T, Lee, H, Leister, AG, Locke, G, Maggi, G, Maher, E, Manly, S, Mann, WA, Marshall, CM, McFarland, KS, McGivern, CL, McGowan, AM, Mislivec, A, Morfin, JG, Mousseau, J, Naples, D, Nelson, JK, Niculescu, G, Niculescu, I, Ochoa, N, O'Connor, CD, Olsen, J, Osmanov, B, Osta, J, Palomino, JL, Paolone, V, Park, J, Patrick, CE, Perdue, GN, Pena, C, Rakotondravohitra, L, Ransome, RD, Ray, H, Ren, L, Rodrigues, PA, Rude, C, Sassin, KE, Schellman, H, Schmitz, DW, Schneider, RM, Schulte, EC, Simon, C, Snider, FD, Snyder, MC, Sobczyk, JT

Publicado 2013

Enlace

This work was supported by the Fermi National Accelerator Laboratory under United States Department of Energy (DOE) Office of High Energy Physics Contract No. DE-AC02-07CH11359 which included the MINERvA construction project. Construction support also was granted by the United States National Science Foundatation (NSF) under Grant No. PHY-0619727 and by the University of Rochester. Support for participating scientists was provided by NSF and DOE (U.S.A.) by CAPES and CNPq (Brazil), by CoNaCyT (Mexico), by CONICYT (Chile), by CONCYTEC, DGI-PUCP, and IDI/IGI-UNI (Peru), by Latin American Center for Physics (CLAF), and by RAS and the Russian Ministry of Education and Science (Russia). We thank the MINOS Collaboration for use of its near detector data. Finally, we thank the staff of Fermilab for support of the beam line and the detector.

12

artículo

Demonstration of communication using neutrinos

Publicado por
Stancil, DD, Adamson, P, Alania, M, Aliaga, L, Andrews, M, Del Castillo, CA, Bagby, L, Alba, JLB, Bodek, A, Boehnlein, D, Bradford, R, Brooks, WK, Budd, H, Butkevich, A, Caicedo, DAM, Capista, DP, Castromonte, CM, Chamorro, A, Charlton, E, Christy, ME, Chvojka, J, Conrow, PD, Danko, I, Day, M, Devan, J, Downey, JM, Dytman, SA, Eberly, B, Fein, JR, Felix, J, Fields, L, Fiorentini, GA, Gago, AM, Gallagher, H, Gran, R, Grange, J, Griffin, J, Griffin, T, Hahn, E, Harris, DA, Higuera, A, Hobbs, JA, Hoffman, CM, Hughes, BL, Hurtado, K, Judd, A, Kafka, T, Kephart, K, Kilmer, J, Kordosky, M, Kulagin, SA, Kuznetsov, VA, Lanari, M, Le, T, Lee, H, Loiacono, L, Maggi, G, Maher, E, Manly, S, Mann, WA, Marshall, CM, Mcfarland, KS, Mislivec, A, Mcgowan, AM, Morfin, JG, Da Motta, H, Mousseau, J, Nelson, JK, Niemiec-Gielata, JA, Ochoa, N, Osmanov, B, Osta, J, Palomino, JL, Paradis, JS, Paolone, V, Park, J, Pena, C, Perdue, G, Lara, CEP, Peterman, AM, Pla-Dalmau, A, Pollock, B, Prokoshin, F, Ransome, RD, Ray, H, Reyhan, M, Rubinov, P, Ruggiero, D, Sands, OS, Schellman, H, Schmitz, DW, Schulte, EC, Simon, C, Salinas, CJS, Stefanski, R, Stevens, RG, Tagg, N, Takhistov, V, Tice, BG, Tilden, RN, Velasquez, JP

Publicado 2012

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Beams of neutrinos have been proposed as a vehicle for communications under unusual circumstances, such as direct point-to-point global communication, communication with submarines, secure communications and interstellar communication. We report on the performance of a low-rate communications link established using the NuMI beam line and the MINERvA detector at Fermilab. The link achieved a decoded data rate of 0.1 bits/sec with a bit error rate of 1% over a distance of 1.035 km, including 240 m of earth.

13

artículo

Design, calibration, and performance of the MINERvA detector

Publicado por
Aliaga L., Bagby L., Baldin B., Baumbaugh A., Bodek A., Bradford R., Brooks W.K., Boehnlein D., Boyd S., Budd H., Butkevich A., Martinez Caicedo D.A., Castromonte C.M., Christy M.E., Chvojka J., Da Motta H., Damiani D.S., Danko I., Datta M., Devan J., Draeger E., Dytman S.A., Díaz G.A., Eberly B., Edmondson D.A., Felix J., Fields L., Fiorentini G.A., Flight R.S., Gago A.M., Gallagher H., George C.A., Gielata J.A., Gingu C., Gran R., Grange J., Grossman N., Harris D.A., Heaton J., Higuera A., Hobbs J.A., Howley I.J., Hurtado K., Jerkins M., Kafka T., Kantner M.O., Keppel C., Kilmer J., Kordosky M., Krajeski A.H., Kumbartzki G.J., Lee H., Leister A.G., Locke G., Maggi G., Maher E., Manly S., Mann W.A., Marshall C.M., McFarland K.S., McGivern C.L., McGowan A.M., Mislivec A., Morfín J.G., Mousseau J., Naples D., Nelson J.K., Niculescu G., Niculescu I., O'Connor C.D., Ochoa N., Olsen J., Osmanov B., Osta J., Palomino J.L., Paolone V., Park J., Perdue G.N., Peña C., Pla-Dalmau A., Rakotondravohitra L., Ransome R.D., Ray H., Ren L., Rubinov P., Rude C., Sassin K.E., Schellman H., Schmitz D.W., Schneider R.M., Schulte E.C., Simon C., Snider F.D., Snyder M.C., Solano Salinas C.J., Tagg N., Tice B.G., Tilden R.N., Velásquez J.P., Walton T., Westerberg A.

Publicado 2014

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The skin is the largest organ of the body that protects it from the external environment. High- frequency ultra sound (HF-US) has been used to visualize the skin in depth and to diagnose some pathologies in dermatological applications. Quantitative ultrasound (QUS) includes several techniques that provide values of particular physical properties. In this thesis work, three QUS parameters are explained and used to characterize healthy skin through HF-US: attenuation coefficient slope (ACS), backscatter coefficient (BSC) and shear wave speed (SWS). They were estimated with the regularized spectral-log difference (RSLD) method, the reference phan- tom method, and the crawling wave sonoelastography method, respectively. All the three parameters were assessed in phantoms, ex vivo and in vivo skin. In calibrated phantoms, RSLD showed a reduc- tion of up to 93% of the standard deviation concern...