Full Text Journal Articles by
Author Roger Hernandez

Advertisement

Find full text journal articles








COVID-19 and Multisystem Inflammatory Syndrome in Latin American Children: A Multinational Study.

Omar Yassef Antúnez-Montes, Maria Isabel Escamilla, Augusto Flavio Figueroa-Uribe, Erick Arteaga-Menchaca, Manuel Lavariega-Saráchaga, Perla Salcedo-Lozada, Priscilla Melchior, Rodrigo Beréa de Oliveira, Juan Carlos Tirado Caballero, Hernando Pinzon Redondo, Laura Vanessa Montes Fontalvo, Roger Hernandez, Carolina Chavez, Francisco Campos, Fadia Uribe, Olguita Del Aguila, Jorge Alberto Rios Aida, Andrea Parra Buitrago, Lina Maria Betancur Londoño, León Felipe Mendoza Vega, Carolina Almeida Hernández, Michela Sali, Julian Esteban Higuita Palacio, Jessica Gomez-Vargas, Adriana Yock-Corrales, Danilo Buonsenso,

<h4>Background</h4>To date, there are no comprehensive data on pediatric COVID-19 from Latin America. This study aims to assess COVID-19 and Multisystem Inflammatory Syndrome (MIS-C) in Latin American children, to appropriately plan and allocate resources to face the pandemic on a local and international level.<h4>Methods</h4>Ambispective multicenter cohort study from 5 Latin ... Read more >>

Pediatr Infect Dis J (The Pediatric infectious disease journal)
[2021, 40(1):e1-e6]

Cited: 0 times

View full text PDF listing >>



COVID-19 in South American Children: A Call For Action.

Omar Yassef Antúnez-Montes, María Isabel Escamilla, Augusto Flavio Figueroa-Uribe, Erick Arteaga-Menchaca, Manuel Lavariega-Sárachaga, Perla Salcedo-Lozada, Rosa Arana Sunohara, Priscilla Melchior, Jorge Omar Flores Del Razo, Juan Carlos Tirado-Caballero, Jaime Amadeo Tasayco-Muñoz, Hernando Pinzon-Redondo, Laura Vanessa Montes-Fontalvo, Teresa Ochoa, Francisco Eduardo Campos, Roger Hernandez, Lara Limansky, Olguita Del Aguila, Danilo Buonsenso,

Pediatr Infect Dis J (The Pediatric infectious disease journal)
[2020, 39(10):e332-e334]

Cited: 0 times

View full text PDF listing >>



Advertisement

COVID-19 and Multisystem Inflammatory Syndrome in Latin American children: a multinational study

Omar Yassef Antunez-Montes, Maria Isabel Escamilla, Augusto Flavio Figueroa-Uribe, Erick Arteaga-Menchaca, Manuel Lavariega-Sarachaga, Perla Salcedo-Lozada, Priscilla Melchior, Rodrigo Berea de Oliveira, Juan Carlos Tirado Caballero, Hernando Pinzon Redondo, Laura Vanessa Montes Fontalvo, Roger Hernandez, Carolin Chavez, Francisco Eduardo Campos, Fadia Uribe, Olguita del Aguila, JORGE ALBERTO RIOS AIDA, Andrea Parra Buitrago, Lina Maria Betancur Londono, Leon Felipe Mendoza Vega, Carolina Almeida Hernandez, Michela Sali, JULIAN HIGUITA PALACIO, Jessica Gomez-Vargas, Adriana Yock Corrales, Danilo Buonsenso,

<h4>Background: </h4> To date, there are no comprehensive data on pediatric COVID19 from Latin America. This study aims to assess COVID-19 and Multisystem Inflammatory Syndrome (MIS C) in Latin American children, in order to appropriately plan and allocate resources to face the pandemic on a local and International lever ... Read more >>

()
[, :]

Cited: 0 times

View full text PDF listing >>



Full-field moisture-induced strains of the different tissues of tamarack and red oak woods assessed by 3D digital image correlation

Rosilei A Garcia, Jedi Rosero-Alvarado, Roger E Hernández,

The full-field moisture-induced strains (in-plane) and Z-displacements (out-of-plane) of the different tissues of tamarack and red oak woods were assessed by three-dimensional digital image correlation (3D-DIC). Swelling strains in tangential (Ɛₓₓ) and radial (Ɛyy) directions and Z-displacements in axial direction were measured on the cross section of wood samples from ... Read more >>

Wood Sci Technol (Wood science and technology)
[2020, 54(1):139-159]

Cited: 0 times

View full text PDF listing >>



[Antibiotic resistance and distribution of serotypes of invasive pneumococcal strains isolated from hospitalized adults in Lima, Peru].

Juan D Castro, Sofía M Siccha, Martha Egoavil, Eduardo Chaparro, Roger Hernandez, Wilda Silva, Olguita Del Águila, Andrés Saenz, Francisco Campos, Isabel Reyes, María E Castillo, Theresa J Ochoa,

To describe the clinical characteristics, antibiotic resistance, and distribution of serotypes of bacterial strains that cause invasive pneumococcal disease (IPD) in adults.Case series. Pneumococcal strains were isolated from 2009 to 2011 from hospitalized adult patients with IPD in five hospitals and two laboratories located in Lima.The analysis of data from ... Read more >>

Rev Peru Med Exp Salud Publica (Revista peruana de medicina experimental y salud publica)
[2017, 34(4):633-641]

Cited: 0 times

View full text PDF listing >>



Oxacillin disk diffusion testing for the prediction of penicillin resistance in Streptococcus pneumoniae.

Gertrudis Horna, María L Molero, Liliana Benites, Sigri Roman, Luz Carbajal, Erik Mercado, María E Castillo, Rito Zerpa, Eduardo Chaparro, Roger Hernandez, Wilda Silva, Francisco Campos, Andy Saenz, Isabel Reyes, Alex Villalobos, Theresa J Ochoa,

Objective To 1) describe the correlation between the zones of inhibition in 1-µg oxacillin disk diffusion (ODD) tests and penicillin and ceftriaxone minimum inhibitory concentrations (MICs) of meningeal and non-meningeal strains of Streptococcus pneumoniae and 2) evaluate the usefulness of the ODD test as a predictor of susceptibility to penicillin ... Read more >>

Rev Panam Salud Publica (Revista panamericana de salud publica = Pan American journal of public health)
[2016, 40(1):57-63]

Cited: 0 times

View full text PDF listing >>



[Epidemiologic, clinical and bacteriologic characteristics of pneumococcal meningitis in pediatric patients from Lima, Peru].

Long Davalos, Yessica Terrazas, Ana Quintana, Martha Egoavil, Katherine Sedano, María E Castillo, Isabel Reyes, Eduardo Chaparro, Wilda Silva, Francisco Campos, Andrés Saenz, Roger Hernandez, Olguita Del Águila, Daniel Guillén Pinto, Theresa J Ochoa,

<h4>Objectives.</h4>To describe the clinical characteristics, lethality, antibiotic susceptibility, and serotype distribution of pneumococcal meningitis in pediatric patients in Lima, Peru.<h4>Materials and methods.</h4>A case series of pneumococcal meningitis in children less than 16 years of age from two prospective, multicenter, passive surveillance studies of invasive pneumococcal diseases held in Lima-Peru from ... Read more >>

Rev Peru Med Exp Salud Publica (Revista peruana de medicina experimental y salud publica)
[2016, 33(3):425-431]

Cited: 0 times

View full text PDF listing >>



[Frequency of hepatitis a in children and adolescents from five cities of Peru].

Roger Hernández, Eduardo Chaparro, Carlos Díaz, Martha Carbajal, Érico Cieza, Rosario Cerpa,

In order to determine the frequency of hepatitis A in children and adolescents in the cities of Lima, Arequipa, Piura, Cajamarca and Iquitos, a descriptive cross-sectional study which measured serum anti-hepatitis A antibodies from 1,721 children and adolescents aged 1-15 years was performed. The overall frequency of positive serology was ... Read more >>

Rev Peru Med Exp Salud Publica (Revista peruana de medicina experimental y salud publica)
[2015, 32(3):499-503]

Cited: 1 time

View full text PDF listing >>



Patterns of Knife Edge Recession in an Industrial Chipper-Canter

Shyamal C Ghosh, Majid Heidari, Roger E Hernandez, Carl Blais,

Chipper-canters are used in primary wood industries for processing small-diameter logs. Knife geometry is one of the principal parameters significantly affecting the chip size and cant surface properties. This work studied the patterns of tool wear as edge recession (ER) in chipping and canting knives of a chipper-canter head. In ... Read more >>

For Prod J (Forest products journal)
[2015, 65(7-8):358-364]

Cited: 0 times

View full text PDF listing >>



[Antibiotic resistance of streptococcus pneumoniae among healthy nasopharyngeal carriers in seven regions of Peru].

Nancy Torres, Ricardo Velásquez, Erik H Mercado, Martha Egoavil, Gertrudis Horna, Lida Mejía, María E Castillo, Eduardo Chaparro, Roger Hernández, Wilda Silva, Francisco E Campos, Andrés Sáenz, Félix Hidalgo, Carolina Letona, Angel G Valencia, Rosario Cerpa, Bernardo López-de-Romaña, Berenice Torres, Fiorella Castillo, Andrea Calle, Synthia Rabanal, Jackeline Pando, Elizabeth Lacroix, Isabel Reyes, Humberto Guerra, Theresa J Ochoa,

<h4>Objectives</h4>To determine the pattern of antibiotic susceptibility of isolated Streptococcus pneumoniae strains of healthy nasopharyngeal carriers younger than 2 years in seven regions of Peru.<h4>Materials and methods</h4>Between 2007 and 2009, nasopharyngeal swab samples were collected among 2123 healthy children aged 2-24 months in growth and development medical practices (CRED) and ... Read more >>

Rev Peru Med Exp Salud Publica (Revista peruana de medicina experimental y salud publica)
[2013, 30(4):575-582]

Cited: 1 time

View full text PDF listing >>



Effect of the Cutting Speed on the Surface Quality of Black Spruce Cants Produced by a Chipper-Canter

Roger E Hernández, Svetka Kuljich, Oussema Naffeti, Ahmed Koubaa,

The effect of cutting speed on surface quality of black spruce (Picea mariana (Mill) B.S.P.) cants produced by a chipper-canter was evaluated. Four cutting speeds (18.9, 21.3, 24.2, and 27.1 m/s) were tested while feed speed was adjusted to obtain the same nominal chip length of 27.5 mm for each ... Read more >>

For Prod J (Forest products journal)
[2013, 63(1-2):39-46]

Cited: 0 times

View full text PDF listing >>



[Pneumococcal serotypes in carrier children prior to the introduction of anti-pneumococcal vaccines in Peru].

Erik H Mercado, Martha Egoavil, Sara G Horna, Nancy Torres, Ricardo Velásquez, María E Castillo, Eduardo Chaparro, Roger Hernández, Wilda Silva, Francisco E Campos, Andrés Sáenz, Félix Hidalgo, Carolina Letona, Ángel G Valencia, Rosario Cerpa, Bernardo López-de-Romaña, Jackeline Pando, Berenice Torres, Fiorella Castillo, Andrea Calle, Synthia Rabanal, Theresa J Ochoa,

<h4>Objectives</h4>To determine the carriage rate and serotype distribution of Streptococcus pneumoniae in the nasopharynx of healthy children younger than 2 years prior to the universal use of the pneumococcal conjugate vaccines in Peru.<h4>Materials and methods</h4>Between 2007 and 2009 we collected nasopharyngeal swab samples from 2,123 healthy children aged 2 to ... Read more >>

Rev Peru Med Exp Salud Publica (Revista peruana de medicina experimental y salud publica)
[2012, 29(1):53-60]

Cited: 1 time

View full text PDF listing >>



Toward a process monitoring of CNC wood router. Sensor selection and surface roughness prediction

Piotr Iskra, Roger E Hernández,

The measurement of wood surface roughness is performed once the machining process is completed. It requires considerable time since the measurement is performed at slow speed. The objective of this study was to develop a method to evaluate the surface roughness of paper birch wood while routing. For this purpose, ... Read more >>

Wood Sci Technol (Wood science and technology)
[2012, 46(1-3):115-128]

Cited: 1 time

View full text PDF listing >>



Effects of peripheral planing on surface characteristics and adhesion of a waterborne acrylic coating to black Spruce Wood

Julie Cool, Roger E Hernandez,

Peripheral planing of black spruce (Picea mariana) wood was optimized for rake angle and feed speed. Both cutting parameters affected surface characteristics at the microscopic and macroscopic level. In turn, the interaction between rake angle and feed speed had a significant impact on surface roughness, disperse component of surface energy, ... Read more >>

For Prod J (Forest products journal)
[2012, 62(2):124-133]

Cited: 1 time

View full text PDF listing >>



[Enteroviral central nervous system infections in children treated at a hospital in Lima, Peru].

Iván O Espinoza, Theresa J Ochoa, Susan Mosquito, Francesca Barletta, Roger Hernández, María del Pilar Medina, María Luisa Stiglich, Claudia Ugarte, Daniel Guillén,

<h4>Objectives</h4>To determine the frequency and clinical features of central nervous system infections caused by enterovirus in children treated at the Hospital Nacional Cayetano Heredia in Lima, Peru.<h4>Materials and methods</h4>A prospective, descriptive study was performed from April 2008 to March 2010. Patients aged 1 month - 14 years with clinical diagnosis ... Read more >>

Rev Peru Med Exp Salud Publica (Revista peruana de medicina experimental y salud publica)
[2011, 28(4):602-609]

Cited: 1 time

View full text PDF listing >>



Using acoustic sensors to improve the efficiency of the forest value chain in Canada: a case study with laminated veneer lumber.

Alexis Achim, Normand Paradis, Peter Carter, Roger E Hernández,

Engineered wood products for structural use must meet minimum strength and stiffness criteria. This represents a major challenge for the industry as the mechanical properties of the wood resource are inherently variable. We report on a case study that was conducted in a laminated veneer lumber (LVL) mill in order ... Read more >>

Sensors (Basel) (Sensors (Basel, Switzerland))
[2011, 11(6):5716-5728]

Cited: 2 times

View full text PDF listing >>



Improving the sanding process of black spruce wood for surface quality and water-based coating adhesion

Julie Cool, Roger E Hernández,

The sanding of black spruce wood prior to coating application was optimized for feed speed and grit size. As feed speed increased, the surface roughness and the surface energy of the samples increased. For the different sanding programs, reductions of the surface roughness and the contact angles were observed with ... Read more >>

For Prod J (Forest products journal)
[2011, 61(5):372-380]

Cited: 1 time

View full text PDF listing >>



Diarrheagenic Escherichia coli in human immunodeficiency virus (HIV) pediatric patients in Lima, Peru.

Anicia M Medina, Fulton P Rivera, Liliana M Romero, Lenka A Kolevic, Maria E Castillo, Eduardo Verne, Roger Hernandez, Yovanna E Mayor, Francesca Barletta, Erik Mercado, Theresa J Ochoa,

We conducted a prospective study in three hospitals in Lima in human immunodeficiency virus (HIV) children to determine the frequency of diarrheagenic Escherichia coli. Five E. coli colonies/patients were studied by a multiplex real-time polymerase chain reaction to identify the six currently recognized groups of diarrhea-associated E. coli. We have ... Read more >>

Am J Trop Med Hyg (The American journal of tropical medicine and hygiene)
[2010, 83(1):158-163]

Cited: 8 times

View full text PDF listing >>



Effect of kiln-drying on the hardness and machining properties of tamarack wood for flooring.

Bustos, Hernandez, Fortin,

The hardness, planing, and moulding properties of tamarack wood from natural forests were evaluated on kiln-dried specimens following three types of drying schedules: high temperature, elevated temperature, and conventional. Hardness tests were conducted according to the ASTM D143 standard. Planing and moulding properties were evaluated according to the ASTM D1666-87 ... Read more >>

For Prod J (Forest products journal)
[2009, 59(1-2):71-76]

Cited: 0 times

View full text PDF listing >>



Genetic variation in wood color and its correlations with tree growth and wood density of Calycophyllum spruceanum at an early age in the Peruvian Amazon

Carmen Sotelo Montes, Roger E Hernández, Jean Beaulieu, John C Weber,

Calycophyllum spruceanum (Benth.) Hook. f. ex K. Shum. is an important timber-tree species in the Peruvian Amazon Basin. Markets currently prefer wood with a uniform, light yellow color, but these preferences may change in the future. As farmers and industry commonly use wood from young trees, it is important to ... Read more >>

New For (Dordr) (New forests)
[2008, 35(1):57-73]

Cited: 2 times

View full text PDF listing >>



Influence of accessory substances, wood density and interlocked grain on the compressive properties of hardwoods

Roger E Hernández,

Wood samples of nine tropical hardwoods from Peru and sugar maple wood from Quebec were selected to perform moisture sorption tests associated with parallel-to-grain and tangential compression tests using a multiple step procedure at 25°C. Cold-water and hot-water extractives, sequential cyclohexane (CYC), acetone (ACE) and methanol (MET) extracts, ash content ... Read more >>

Wood Sci Technol (Wood science and technology)
[2007, 41(3):249-265]

Cited: 1 time

View full text PDF listing >>



Characteristics of sugar maple wood surfaces machined with the fixed-oblique knife pressure-bar cutting system

Luiz Fernando de Moura, Roger E Hernández,

Oblique cutting differs from orthogonal cutting by an inclination given to the knife edge, which induces several changes on tool geometry, cutting forces, as well as on the quality of machined surfaces. In this work, a pressure bar was used during oblique cutting to reduce the occurrence of torn grain. ... Read more >>

Wood Sci Technol (Wood science and technology)
[2007, 41(1):17-29]

Cited: 0 times

View full text PDF listing >>



A NMR study of water distribution in hardwoods at several equilibrium moisture contents

Giana Almeida, Stéphane Gagné, Roger E Hernández,

The water state of one tropical (Robinia coccinea) and two temperate (Acer saccharum and Fagus grandifolia) hardwoods was determined at different equilibrium moisture contents (EMC) during desorption at 25°C. NMR technique was used to separate different components of water in wood. The species studied presented different structures, which were apparent ... Read more >>

Wood Sci Technol (Wood science and technology)
[2007, 41(4):293-307]

Cited: 6 times

View full text PDF listing >>



Structural performance of finger-jointed black spruce lumber with different joint configurations

Cecilia Bustos, Robert Beauregard, Mohammad Mohammad, Roger E Hernández,

In Eastern Canada, black spruce (Picea mariana (Mill.) B.S.P.) is used for producing engineered wood products. However, little information is available on the influence of finger-joint configuration on the structural performance of this species. The purpose of this work was to evaluate the behavior of finger-jointed black spruce for three ... Read more >>

For Prod J (Forest products journal)
[2003, 53(9):72-76]

Cited: 1 time

View full text PDF listing >>



Effects of curing time and end pressure on the tensile strength of finger-joined black spruce lumber

Cecilia Bustos, Mohammad Mohammad, Roger E Hernández, Robert Beauregard,

Finger-joined black spruce (Picea mariana (Mill.) B.S.P) specimens from eastern Canada were prepared to assess the effect of curing time and end pressure on the tensile strength of the joints. An isocyanate adhesive cured at room temperature and a feather joint configuration were used for this purpose. The joints were ... Read more >>

For Prod J (Forest products journal)
[2003, 53(11-1):85-89]

Cited: 0 times

View full text PDF listing >>





Advertisement

Disclaimer
10.2946 s