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Immersible ergocycle prescription as a function of relative exercise intensity

Journal of Sport and Health Science 2017年第2期6卷 219-224页

作者： mauricio Garzon Mathieu Gayda Anil Nigam Alain-Steve Comtois Martin Juneau Cardiovascular Prevention and Rehabilitation Centre (EPIC) Montreal Heart Institute and University of Montreal Montreal Quebec HIT 1N6 Canada Research Center Montreal Heart Institute and University of Montreal Montreal Quebec H1T 1C8 Canada Department of Kinesiology University of Monireal Montreal Quebec H3T 1J4 Canada Department of Medicine University of Montreal Montreal Quebec H3T 1J4 Canada Kinanthropology Department University of Quebec in Montreal (UQAM) Montreal Quebec H2X 1Y4 Canada

Purpose: The purpose of this study was to establish the relationship between various expressions of relative exercise intensity percentage of maximal oxygen uptake(%VO_(2max)), percentage of maximal heart rate(%HR_(max)), %VO_2 reserve(%VO_2R), and %HR reserve(%HRR)) in order to obtain the more appropriate method for exercise intensity prescription when using an immersible ergocycle(IE) and to propose a prediction equation to estimate oxygen consumption(VO_2) based on IE pedaling rate(rpm) for an individualized exercise training ***: Thirty-three healthy participants performed incremental exercise tests on IE and dryland ergocycle(DE) at equal external power output(Pext). Exercise on IE began at 40 rpm and was increased by 10 rpm until exhaustion. Exercise on DE began with an initial load of 25 W and increased by 25 W/min until exhaustion. VO_2 was measured with a portable gas analyzer(COSMED K4b^2) during both incremental tests. On IE and DE, %VO_2R, %HRmax, and %HRR at equal Pext did not differ(p > 0.05).Results: The %HRR vs. %VO_2R regression for both IE and DE did not differ from the identity line %VO_2R IE = 0.99 × HRR IE(%) + 0.01(r^2= 0.91, SEE = 11%); %VO_2R DE = 0.94 × HRR DE(%) + 0.01(r^2= 0.94, SEE = 8%). Similar mean values for %HRmax, %VO_2R, and %HRR at equal Pext were observed on IE and DE. Predicted VO_2 obtained according to rpm on IE is represented by: VO_2(L/min) = 0.000542 × rpm2-0.026 × rpm + 0.739(r = 0.91, SEE = 0.319 L/min).Conclusion: The %HRR–%VO_2R relationship appears to be the most accurate for exercise training prescription on IE. This study offers new tools to better prescribe, control, and individualize exercise intensity on IE.

关键词： Exercise prescription Heart rate Immersed ergocycle Oxygen uptake Pedaling rate

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Relict glacial landscape in the Sierra Baguales Mountain Range(50°-51°S):evidence of glaciation dynamics and types in the eastern foothills of the southern Patagonian Andes

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Journal of Mountain Science 2017年第2期14卷 282-295页

作者： ARAOS.JoséMiguel LE ROUX.Jacobus Philiphus GUTIERREZ.Néstor mauricio Department of Geology FCFMUniversidad de ChilePlaza Ercilla#803SantiagoChile Department of Geography Faculty of Social Sciences.Universidad Alberto HurtadoUienfuegos#41SantiagoChile Department of Geology FCFMUniversidad de Chile.Andean Geothermal Centre of ExcellencePlaza Ereilla#803SantiagoChile

The glacial morphology of southern South American presents invaluable evidence to reconstruct former glacier behaviour and its relation to climate and environmental changes. However, there are still spatial and temporal gaps in the reconstruction of the Holocene Patagonian glacial landscape. Here we present the first geomorphological record for the Sierra Baguales Mountain Range(SBMR), forming the eastern foothills of the Southern Patagonian Andes 200 km from the Pacific coast. This area is topographically isolated from the Southern Patagonian Ice Field(SPIF), and is affected by the Westerly Winds. The study area shows evidence of ice sheet and alpine glaciations related to Andean uplift,which caused a marked climatic contrast between its western and eastern flanks since the Last Glacial Maximum(LGM). The regional rock mass strength and precipitation gradient acted as a controlling factor in the glacial cirque distribution and sizes, as well as in the development of glaciation types. We report new radiocarbon dates associated with warm/dry to cold/wet climatic changes during the middle Holocene, when former small alpine glaciers were located in the uppermost section of the SBMR basins, and eventually converged to form a small ice field or a composite valley glacier at lower *** can be explained by an estimated regional temperature drop of 3.8°C±0.8°C, based on a 585±26m Equilibrium Line Altitude(ELA) descent, inferred by geomorphological evidence and the Accumulation Area Ratio(AAR), in addition to a free-air adiabatic lapse rate. Subsequently, the glaciers receded due to climatic factors including a rise in temperature, as well as non-climatic factors, mainly the glacier bedrock topography.

关键词： Glacial morphology Sierra Baguales Ice sheet glaciations Alpine glaciations Middle Holocene

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Native Langage and School: A Case Study on Ethnic College Students’ Language Practices and Their Acadmic Experience at Northeast Normal University

Native Langage and School: A Case Study on Ethnic College St...

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作者： Harold mauricio Carre（?）o Parada 东北师范大学

学位级别：硕士

Ethnic minority students are enrolled in formal education everyday around the world. This study explores the influence of the environment upon the participants’native language use. The concept of practice describes the use of the language in this study;it also surveys the role of native languages in connection with the academic performance. In addition, it inquires about the advantanges and the challenges of studying in a second language for Chinese ethnic minority students in Northeast Normal University. A pilot study was used to test the questions for this study. A bilingual questionnaire in English and Chinese and an interview-focus group were used to collect data;All the information was tape recorded to save the information. The gathering and analysis were guided for three research questions that attempt to show the language used in the university, the role of the native language in the participants field of study and the experience of use a second language as medium of instruction. The findings show that the native language plays an important role in the studies of the participants and it is a mark of identity for them. The study wants to contribute to the literature about ethnic minority students in China and other countries.

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Extending JASAG with data processing techniques for speeding up agricultural simulation applications:A case study with Simugan

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Information Processing in Agriculture 2016年第4期3卷 235-243页

作者： Mathias Longo mauricio Arroqui Juan Rodriguez Claudio Machado Cristian Mateos Alejandro Zunino ISISTAN–CONICET.Tandil(B7001BBO) Buenos AiresArgentina Consejo Nacional de Investigaciones Cientı´ficas y Te´cnicas(CONICET) Argentina Facultad de Ciencias Veterinarias–UNICEN.Tandil(B7001BBO) Buenos AiresArgentina Agencia Nacional de Promocio´n Cientı´fica y Tecnolo´gica(ANPCyT) Argentina

Resource-intensive agricultural simulation applications have increased the need for gridification tools–i.e.,software to transform and scale up the applications using Grid infrastructures–.Previous research has proposed JASAG,a generic gridification tool for agricultural applications,through which the performance of a whole-farm simulation application called Simugan improved ***,JASAG still lacks proper support for efficiently exploiting Grid storage resources,causing significant delays for assembling and summarizing the generated *** this application note,two different data processing techniques in the context of JASAG are presented to tackle this *** was again employed to validate the benefits of these *** using data processing techniques show that the execution time of Simugan was accelerated by a factor of up to 34.34.

关键词： Agricultural simulation applications Grid Computing Gridification JASAG Data processing Simugan

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A rare pigmented keratitis caused by Aspergillus fumigatus

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International Journal of Ophthalmology(English edition) 2015年第1期8卷 208-210页

作者： mauricio Vélez Kepa Balparda Ana María Díaz Universidad Pontificia Bolivariana

Dear Sir,I am mauricio Vélez,from the Department of Ophthalmology,Cornea Service Director,Universidad Pontificia Bolivariana in Medellín,***,I would like to share an interesting case I managed recently,which I’ve entitled"A rare pigmented keratitis caused by Aspergillus fumigatus".Fungi are a relatively uncommon cause of microbial keratitis

关键词： A rare pigmented keratitis caused by Aspergillus fumigatus

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Enhanced Ferromagnetism in ZnO Nanoribbons and Clusters Passivated with Sulfur

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Nano Research 2008年第5期1卷 420-426页

作者： Andres R.Botello-Mendez Florentino Lopez-Urias mauricio Terrones Humberto Terrones National Laboratory for Nanoscience and Nanotechnology Research(LINAN) Advanced Materials DepartmentIPICYTCamino a la Presa San José205578216S.L.P.Mexico

Inspired by recent experimental results,the electronic and magnetic properties of sulfur-passivated ZnO clusters and zigzag nanoribbons have been studied using fi rst principles calculations in the framework of the local spin density *** the case of the ZnO nanoribbons,the sulfur atoms or thiol groups were attached in different ways to the zinc or oxygen atoms located at the edges,whereas in clusters,the sulfur atoms were set on the surface,mainly interacting with atoms with low-coordinate *** an exhaustive atomic relaxation,we found that a magnetic moment emerges in zigzag nanoribbons both with and without sulfur-passivation on the ***,the magnitude of the magnetic moment is very sensitive to sulfur *** particular,we found that when sulfur is attached to the zinc atoms in an alternating fashion along the ribbon edges,the magnetic moment is a maximum(1.4μB/unit cell).In the case of clusters,we found that the Zn_(15)O_(15) cluster exhibits a high spin moment of 5.5μB when capped with sulfur *** calculations indicate that sulfur-passivating of ZnO nanosystems could be responsible for recently observed ferromagnetic responses.

关键词： Zinc oxide sulfur magnetism nanoribbons clusters

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Unraveling the morphological patterns of a subantarctic eelpout:a geometric morphometric approach

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Integrative Zoology 2023年第2期18卷 372-384页

作者： Fernanda S.ORREGO Mathias HÜNE Hugo A.BENÍTEZ mauricio F.LANDAETA Laboratorio de Ictiología e Interacciones Biofísicas(LABITI) Instituto de BiologíaFacultad de CienciasUniversidad de ValparaísoValparaísoChile Centro de Investigación para la Conservación de los Ecosistemas Australes(ICEA) Punta ArenasChile Laboratorio de Ecología y Morfometría Evolutiva Centro de Investigación de Estudios Avanzados del MauleUniversidad Católica del MauleTalcaChile Centro de Observación Marino para Estudios de Riesgos del Ambiente Costero(COSTA-R) Universidad de ValparaísoViña del MarChile Millennium Nucleus for Ecology and Conservation of Temperate Mesophotic Reef Ecosystems(NUTME) Millennium Institute Biodiversity of Antarctic and Subantarctic Ecosystems(BASE) SantiagoChile

Phenotypic variation in organisms depends on the genotype and the environmental constraints of the habitat that they ***,for marine species inhabiting contrasting aquatic conditions,it is expected toﬁnd covari-ation between the shape and its spatial *** studied the morphology of the head and cephalic sensory canals of the eelpout Austrolycus depressiceps(4.5–22.5 cm TL)across its latitudinal distribution in South Paciﬁc(45°S–55°S).Geometric morphometric analyses show that the shape varied from individuals with larger snout and an extended suborbital canal to individuals with shorter snouts and frontally compressed suborbital *** was size variation across the sampled populations,but that size does not have a clear latitudinal *** 8%of the shape variation relates to this size variation(allometry),represented by a decrease in the relative size of the eye,and a depression of the posterior margin of the *** were spatial differences in the shape of the head,but these differences were probably caused by allometric ***,2 of the canals of the cephalic lateralis pores and the head shape showed modularity in its *** study shows that the morphology of marineﬁsh with a shallow distribution varies across distances of hundreds of kilometers(i.e.,phenotypic modulation).

关键词： Austrolycus depressiceps geometric morphometrics morphology phenotype spatial distribution

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Tuberculous pericarditis-a silent and challenging disease:A case report

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World Journal of Clinical Cases 2022年第6期10卷 1869-1875页

作者： Oscar David Lucero Marlon mauricio Bustos Darwin Jhoan Ariza Rodriguez Juan Camilo Perez Department of Internal Medicine Hospital Universitario San IgnacioBogota 110231Colombia Internal Medicine Resident Pontificia Universidad JaverianaBogota 110231Colombia

BACKGROUND Tuberculous pericarditis(TP)remains a challenge for endemic *** developing countries,one to two percent of patients with pulmonary tuberculosis develops *** SUMMARY A 49-year-old woman presented with dyspnea,chest pain and dry *** physical examination,veiled heart sounds were *** electrocardiogram showed low-voltage complexes and the transthoracic echocardiography revealed a large and free-looking pericardial *** patient was taken for an open *** pericardial fluid revealed high levels of adenosine deaminase and Ziehl-Neelsen stain showed acid-fast *** chain reaction study for Mycobacterium tuberculosis in pericardial fluid was *** patient received tetra conjugate management with adequate clinical response after the first week of treatment and resolution of fever and chest *** In cases of TP,obtaining pericardial fluid and/or pericardial biopsy is the most efficient strategy to confirm the *** diagnosis of this entity will allow physicians to initiate timely treatment,avoid complications and improve the patient's clinical outcome,so we consider the description of this case pertinent and its review in the literature.

关键词： Tuberculosis Pericardial disease Tuberculous pericarditis Pericardial effusion Mycobacterium tuberculosis Case report

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Auditory function in symptomatic patients recovered from SARS-CoV-2 and unexposed patients:An analytical cross-sectional study

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Journal of Otology 2023年第3期18卷 118-124页

作者： Katherin Andrea Borda Pedraza Sergio mauricio Moreno Lopez Javier Amaya-Nieto Liliana Akli Serpa Ginna Paola Saavedra Martínez mauricio Ernesto Quinche Pardo Alberto Pena Valenzuela Otorhinolaryngology Department Universidad Nacional ColombiaColombia Epidemiology Department Universidad de Los AndesColombia Health Systems and Services Research Group Universidad Nacional de ColombiaBogotaColombia Audiology Department Universidad Nacional de ColombiaColombia Health and Social Protection Ministry Colombia Universidad Nacional Colombia Colombia Otorhinolaryngology Department Universidad Nacional de ColombiaColombia

Objective:To describe audiological symptoms,audiometric profile,and distortion product otoacoustic emission in symptomatic patients recovering from SARS-CoV-2 infection(positive RT-PCR test)and asymptomatic patients(negative RT-PCR test).Methods:An analytical cross-sectional study was conducted using data obtained from clinical charts,physical examination,audiometry,and distortion product otoacoustic emission on 40 patients[case patients(CP)]recovering from SARS-CoV-2 infection diagnosed by a positive RT-PCR test and 22asymptomatic participants with a negative RT-PCR test[non-case(NC)].Results:Sixty-two patients(mean age:31.1 and 28.2 years in the CP and NC groups,respectively)were *** participants were young without significant comorbidities,risk factors for hearing loss or otological ***(5%),tinnitus(17.5%)and aural fullness/hearing loss(35%)were found in the CP group.A statistically significant difference was found in specific frequencies(1000,4000,and 8000 Hz)and pure tone average(low and high conversational frequencies with increased threshold in the PC group compared with the NC group),which was not found in distortion product otoacoustic ***:Audiovestibular symptoms are frequent in symptomatic patients recovering from SARS-CoV-2 ***-CoV-2 infection was consistently associated with an increased audiometric hearing threshold at specific frequencies and low tone average.

关键词： SARS-CoV-2 Cochlear diseases Pure tone audiometry Otoacoustic emissions Hearing loss Otological symptoms

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Quantitative morphometric analysis of the Jama River profile in a tectonically active margin (Northwestern Ecuador)

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Journal of Mountain Science 2018年第5期15卷 966-975页

作者： Pedro S.B. REYES mauricio E. VALAREZO Jenry CORDOVA Francois A. MICHAUD Camilo ZAPATA Department of Geology Escuela Politécnica Nacional Ladrón de Gueuara E11-253 PO.Box 17-01-2759 Quito Ecuador C-eostrat S.A. Jorge Drom N39-188y Gaspar de Villaroel Quito Ecuador Department of Civil and Environmental Engineering Escuela Politécnica National Ladrón de Guevara E11-253 PO.Box17-ol-2759 Quito Ecuador Sorbonne Université Université Cote d'Azur IRD CNRS Observatoire de la Cdte d'Azur C-eoazur 250 rue A. EinsteinSophia Antipolis 06560 Valbonne France

The longitudinal profile of a river channel can be described in function of mathematical expressions. The logarithmic fit is the most used method to describe the relative equilibrium of a channel elevation profile. Rivers showing zones of high channel gradient and convex-upward profiles can be evaluated in function of the offset distance with respect to the logarithmic curve. The Jama River profile has been constructed using differential GPS data for the downstream reach and 4-m-grid DEM data base for the remaining headward profile. The resulting longitudinal profile shows a prominent knickpoint of about 80 m in elevation characterized by sharp local convexity. The offset distance in vertical direction from the logarithmic plot is interpreted as the successive accumulation of multiple uplift episodes associated with the Jama Fault System activity. The horizontal offset is suggested to represent the remaining retreated distance for the upstream propagation of the Jama knickpoint. The highly resistant Cretaceous rocks outcropping along the Jama knickpoint reach acts as an inflection point between two subprofiles that show well-fitted logarithmic curves, thereby representing a temporary partitioned equilibrium along the Jama River profile.

关键词： Morphometry Jama River Stream profile Active tectonics

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