Browsing by Author "Carrasco, M."

Now showing 1 - 20 of 23
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    A survey of land mine detection technology
    (TAYLOR & FRANCIS LTD, 2009) Robledo, L.; Carrasco, M.; Mery, D.
    This paper describes the state of the art in land mine detection technology and algorithms. Landmine detection is a growing concern due to the danger of buried landmines to people's lives, economic growth and development. Most of the injured people have no connection with the reason why the mines were placed. There are 50-100 million landmines in more than 80 countries around the world. Deactivation is estimated at 100 000 mines per year, against the nearly 2 million mines laid annually. In this paper we describe and analyse sensor technology available including state-of-the-art technology such as ground penetrating radar (GPR), electromagnetic induction (EMI) and nuclear quadrupole resonance (NQR) among others. Robotics, data processing and algorithms are mentioned, considering support vectors, sensor fusion, neural networks, etc. Finally, we establish conclusions highlighting the need to improve not only the way images are acquired, but the way this information is processed and compared.
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    Acute pancreatitis in Chile: a multicenter study on epidemiology, etiology and clinical outcome: retrospective analysis of clinical files
    (2020) Berger, Z.; Mancilla, C.; Tobar, E.; Morales, M. P.; Baró, M.; Carrasco, M.; Cordero, J.; Cruz, R.; Cruz Urrutia, Ricardo Javier; Lara, C.; Ledesma, S.; Ramírez, G.; Sierralta, A.; Godoy, L.; Valdés, E.
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    Advances on automated multiple view inspection
    (2006) Mery Quiroz, Domingo Arturo; Carrasco, M.
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    Automated multiple view inspection based on uncalibrated image sequences
    (2005) Mery Quiroz, Domingo Arturo; Carrasco, M.; Kalviainen, H.; Parkkinen, J.; Kaarna, A.
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    Automated multiple view inspection of metal castings
    (2007) Mery Quiroz, Domingo Arturo; Carrasco, M.
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    Bifocal Matching Using Multiple Geometrical Solutions
    (2012) Carrasco, M.; Mery Quiroz, Domingo
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    Bimodal biometrie person identification system under perturbations
    (2007) Carrasco, M.; Pizarro, L.; Mery Quiroz, Domingo Arturo
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    CLASH : A CENSUS OF MAGNIFIED STAR-FORMING GALAXIES AT z similar to 6-8
    (2014) Bradley, L.; Zitrin, A.; Coe, D.; Bouwens, R.; Postman, M.; Balestra, I.; Grillo, C.; Monna, A.; Rosati, P.; Carrasco, M.
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    CLASH : the concentration-mass relation of galaxy clusters
    (2015) Merten, J.; Meneghetti, M.; Postman, M.; Umetsu, K.; Zitrin, A.; Medezinski, E.; Nonino, M.; Koekemoer, A.; Melchior, P.; Infante Lira, Leopoldo; Gruen, D.; Moustakas, L.; Bartelmann, M.; Host, O.; Donahue, M.; Coe, D.; Carrasco, M.
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    CLASH: THE ENHANCED LENSING EFFICIENCY OF THE HIGHLY ELONGATED MERGING CLUSTER MACS J0416.1-2403
    (2013) Zitrin, A.; Meneghetti, M.; Umetsu, K.; Broadhurst, T.; Bartelmann, M.; Bouwens, R.; Bradley, L.; Carrasco, M.; Coe, D.; Ford, H.; Kelson, D.; Koekemoer, A. M.; Medezinski, E.; Moustakas, J.; Moustakas, L. A.; Nonino, M.; Postman, M.; Rosati, P.; Seidel, G.; Seitz, S.; Sendra, I.; Shu, X.; Vega, J.; Zheng, W.
    We perform a strong lensing analysis of the merging galaxy cluster MACS J0416.1-2403 (M0416; z = 0.42) in recent CLASH/HST observations. We identify 70 new multiple images and candidates of 23 background sources in the range 0.7 less than or similar to z(phot) less than or similar to 6.14 including two probable high-redshift dropouts, revealing a highly elongated lens with axis ratio similar or equal to 5:1, and a major axis of similar to 100 '' (z(s) similar to 2). Compared to other well-studied clusters, M0416 shows an enhanced lensing efficiency. Although the critical area is not particularly large (similar or equal to 0.6 square'; z(s) similar to 2), the number of multiple images, per critical area, is anomalously high. We calculate that the observed elongation boosts the number of multiple images, per critical area, by a factor of similar to 2.5x, due to the increased ratio of the caustic area relative to the critical area. Additionally, we find that the observed separation between the two main mass components enlarges the critical area by a factor of similar to 2. These geometrical effects can account for the high number (density) of multiple images observed. We find in numerical simulations that only similar to 4% of the clusters (with M-vir >= 6 x 10(14) h(-1) M-circle dot) exhibit critical curves as elongated as in M0416.
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    Reliability of NIRS portable device for measuring intercostal muscles oxygenation during exercise
    (2019) Contreras Briceño, Felipe; Espinosa Ramírez, Maximiliano Andrés; Hevia, G.; Llambias, D.; Carrasco, M.; Cerda, F.; López Fuenzalida, Antonio Eduardo; García Cañete, Patricia; Gabrielli, Luigi; Viscor, G.
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    Resultados generales del Proyecto INTRA-OMS en Chile
    (SOC MEDICA SANTIAGO, 2005) Marin, P.P.; Villalobos, A.; Carrasco, M.; Kalache, A.
    Background: The aging speed in developing countries has been faster than predicted. Thus, health care systems must adapt to face Ibis new scenario efficiently. The WHO designed the INTRA study to assess health promotion anal protection actions in primary care, for people over 50 years of age. Material and methods: Questionnaries designed by WHO were applied to 1,167 subjects (aged 50-94 years, 68% fernale) and 117 health care professionals attending and working respectively, at 33 health care centers of the Vina-Quillota Health Service. Results: Twenty percent of subjects were illiterate and 25% bad less than 6 years of instruction. Forty three percent could reache the health centre by public transportation and 92% did not need to be accompanied; 39% spended snore than one hour to be attended and 71% considered that the service in the centre was good. Sixty seven percent attended regular appointments, 63% did not perform any physical activity and only half of them were advised to start stick activity. Weight loss was recommended to 55% bat only ore third has achieved such goal. Only one third of patients admitted being interrogated about their drinking habits. Among subjects in whom blood pressure was measured, one fourth bad abnormal values. Conclusions: Primary, health care in Chile, although having health care programs for the elderly, is loosing opportunities to improve health status and quality of life of this age group.
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    Segmentation of welding discontinuities using a robust algorithm
    (2004) Carrasco, M.; Mery Quiroz, Domingo Arturo
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    Spectroscopic characterization of galaxy clusters in RCS-1 : spectroscopic confirmation, redshift accuracy, and dynamical mass-richness relation
    (2018) Gilbank, D.; Barrientos, Luis Felipe; Ellingson, E.; Blindert, K.; Yee, H.; Anguita, T.; Gladders, M.; Hall, P.; Hertling, G.; Infante Lira, Leopoldo; Yan, R.; Carrasco, M.; Garcia Vergara, Cristina Javiera; Dawson, K.
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    Strong lensing analysis of PLCK G004.5-19.5, a Planck -discovered cluster hosting a radio relic at z = 0.52
    (2014) Carrasco, M.; Sifon, C.; Menanteau, F.; Hughes, J.; Barrientos, Luis Felipe
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    Subdiagnóstico de delirium en adultos mayores hospitalizados
    (SOC MEDICA SANTIAGO, 2005) Carrasco, M.; Hoyl, T.; Marin, P.P.; Hidalgo, J.; Lagos, C.; Longton, C.; Chavez, P.; Valenzuela, E.; Arriagada, D.
    Background: Delirium is a common underdiagnosed and undertreated problem in elderly inpatients, associated to higher morbidity, mortality and health cost. Aim: To evaluate the prevalence of delirium as hospital admission in medically ill elderly patients and the attending physician's diagnosis and treatment of delirium. Patients and methods: In a prospective and descriptive study, consecutive patients aged 65 years or more, admitted to an internal medicine ward were evaluated by independent physicians, during the first 48 h of admission, to asses the presence of delirium. Diagnosis of delirium was based on the Confusion Assessment Method. Medical and nurse records were reviewed. Family was interviewed when necessary. Results: One hundred eight patients (52% women, age range 65-94 years) with an APACHE II score of 11.6+/-5, were evaluated. Fifty seven patients (52% women, age range 65-94 years) with an APACHE II score of 5% mixed). Delirium prevalence was significantly higher in older patients (66% among those aged 75 years or older versus 30% in younger; p <0.05) and among patients with more severe conditions (88% among those with an APACHE score over 16 versus 47% below that value, p <0.05). Medical records of patients with delirium showed that this diagnosis was present only in 32% and cognitive deficit was described in 73%. Ten percent of patients with delirium received sedative medication and 38% were physically restricted. There were no environmental interventions to prevent or control delirium. Conclusions: Delirium in elderly inpatients at this until is an extraordinarily prevalent problem, seriously under diagnosed (68%) and under treated. This study should alerts our medical community to improve the diagnosis and management of delirium in elderly inpatients.
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    The ALMA Frontier Fields Survey III. 1.1mm emission line identifications in Abell 2744, MACSJ 0416.1-2403, MACSJ 1149.5+2223, Abell 370, and Abell S1063.
    (2017) González López, Jorge; Bauer, Franz Erik; Aravena, M.; Laporte, Nicolás; Bradley, L.; Carrasco, M.; Carvajal, R.; Demarco, R.; Infante Lira, Leopoldo; Kneissl, R.; Koekemoer, A. M.; Muñoz Arancibia, S. M.; Troncoso, P.; Villard, E.; Zitrin, A.