22 research outputs found
Impact of variations of gravitational acceleration on the general circulation of the planetary atmosphere
No full textFundamental to the redistribution of energy in a planetary atmosphere is the general circulation and its meridional structure. We use a general circulation model of the atmosphere in an aquaplanet configuration with prescribed sea surface temperature and investigate the influence of the gravitational acceleration g on the structure of the circulation. For g=g₀=9.81ms⁻², three meridional cells exist in each hemisphere. Up to about g/g₀=1.4 all cells increase in strength. Further increasing this ratio results in a weakening of the thermally indirect cell, such that a two- and finally a one-cell structure of the meridional circulation develops in each hemisphere. This transition is explained by the primary driver of the thermally direct Hadley cell: the diabatic heating at the equator which is proportional to g. The analysis of the energetics of the atmospheric circulation based on the Lorenz energy cycle supports this finding. For Earth-like gravitational accelerations transient eddies are primarily responsible for the meridional heat flux. For large gravitational accelerations, the direct zonal mean conversion of energy dominates the meridional heat flux
MASTER STUDENTS' ATTITUDES TOWARDS ONLINE LEARNING DURING COVID-19 PANDEMIC: BASIS FOR AN INTERVENTION PROGRAM
No full textAbstract: The study assessed the master students’ attitudes towards online learning during a COVID-19 Pandemic regarding the student attitudes, academic support, and external factors of Ramon Magsaysay Memorial Colleges, General Santos City, in the academic year 2020-2021. The objective of the study was attained using the descriptive-survey method of research. A research questionnaire was administered using the google form. The respondents were Thesis 2 students officially enrolled in the second semester of 2020-2021. The study yielded the following salient findings: First, the respondents' level of persistence in online learning during the COVID-19 Pandemic is high in terms of perceptions. Second, academic support is high. Third, external factors are increased. Overall, the level of persistence of master’s students in online learning during the COVID-19 Pandemic is high. The result of the study is an avenue to identify and determine an intervention program to be crafted and sustained to enhance the master’s students’ attitudes towards online learning during the COVID-19 Pandemic.
Keywords: Master students’ attitudes, online learning, COVID-19 pandemic.
Title: MASTER STUDENTS' ATTITUDES TOWARDS ONLINE LEARNING DURING COVID-19 PANDEMIC: BASIS FOR AN INTERVENTION PROGRAM
Author: ALDEMER QUIEL D. COMBATIR, EDILBERT A. REYES
International Journal of Recent Research in Thesis and Dissertation (IJRRTD)
Vol. 3, Issue 2, July 2022 - December 2022
Page No: 177-188
Paper Publications
Website: www.paperpublications.org
Published Date: 02-November-2022
DOI: https://doi.org/10.5281/zenodo.7273672
Paper Download Link (Source)
https://www.paperpublications.org/upload/book/MASTER%20STUDENTS'%20ATTITUDES%20TOWARDS-02112022-2.pdfInternational Journal of Recent Research in Thesis and Dissertation (IJRRTD), Paper Publications, Website: www.paperpublications.or
El efecto del foro como estrategia para desarrollar el pensamiento crítico en el área de ciencias sociales de la Institución Educativa Departamental Algarro
No full textThe purpose of the research was to determine the effectiveness of the pedagogical strategy the forum to develop the critical thinking skills of the eleventh grade students in the area of Social Sciences at the Algarrobo Departmental Educational Institution; the methodology used a quasi-experimental design with a control and experimental group, with Pretest and posttest. The students were intervened in the third period of the year 201. To contribute to the potentialization of thought was based on the skills proposed by Peter Facione (2009): Interpretation, Explanation, Analysis, Inference and Evaluation to measure a questionnaire was used, the results of this investigation allowed to verify that when making the forums contributed to increase the level of critical thinking development of the intervened students, that is, significant differences were found in the level that the experimental group had before and after being intervened. In the same way, it was evident in their opinions and arguments as the intervention process progressed in relation to describing situations, beliefs, events; clarification of meanings; examine ideas, identify and analyze arguments, question evidence, assess opinions and propose alternatives; showing a reflective and reasoned thoughtEl propósito de la investigación fue establecer el efecto de la estrategia pedagógica del foro para desarrollar el pensamiento crítico en el área de Ciencias Sociales en la Institución Educativa Departamental Algarrobo, la metodología utilizó un diseño cuasi-experimental con un grupo de control y experimental, con Pretest y Postest. Los estudiantes fueron intervenidos en el tercer período del año 2017. Para contribuir a la potencialización del pensamiento se basó en las habilidades propuestas por Peter Facione (2009): Interpretación, Explicación, Análisis, Inferencia y Evaluación para medir un cuestionario, los resultados de esta investigación permitieron verificar que al hacer los foros contribuyeron para aumentar el nivel de desarrollo del pensamiento crítico de los estudiantes intervenidos, es decir, se encontraron diferencias significativas en el nivel que tenía el grupo experimental antes y después de ser intervenido. De la misma manera, fue evidente en sus opiniones y argumentos a medida que avanzaba el proceso de intervención en relación con la descripción de situaciones, creencias y eventos; aclaración de significados; examinar ideas, identificar y analizar argumentos, cuestionar evidencia, evaluar opiniones y proponer alternativasMartínez Palmera, Edilbert-79f36f39-25f6-4806-93ff-4b78ff06fc18-
[CODE] maureenjcohen/ExoPlaSim: New haze optical data and tutorial
No full textThe PlaSim 3D general climate model, extended for terrestrial planets. This model contains the PlaSim GCM, as well as all necessary modifications to run tidally-locked planets, planets with substantially different surface pressures than Earth, planets orbiting stars with different effective temperatures, super-Earths, and more. This model also includes the ability to compute carbon-silicate weathering, dynamic orography through the glacier module (though only accumulation and ablation/evaporation/melting are included; glacial flow and spreading are not), and storm climatology. Future features will include support for multiple celestial light sources (e.g. for a habitable moon orbiting a Jovian planet, or circumbinary planets), coupling with N-body integrators such as REBOUND, and CO2 condensation. This release includes photochemical haze/dust transport and radiative transfer. Transport and radiative transfer schemes are described in "Haze optical depth in exoplanet atmospheres varies with rotation rate: Implications for observations," Cohen et al. (2024). Includes optical haze constants with corrected backscattering efficiencies, calculated based on data provided in He et al. 2023 and Corrales et al. 2023 for the stellar spectra of TRAPPIST-1 and Wolf 1061. A tutorial has been added demonstrating how to use the aerosol module, including references to the data sources.Cohen, M., Paradise, A., Borth, H., Lunkeit, F., & Kirk, E. (2023). maureenjcohen/ExoPlaSim: New haze optical data and tutorial (v3.2.3). Zenodo. https://doi.org/10.5281/zenodo.1027823
Random walk lengths of about 30 years in global climate
No full textWe have applied the relation for the mean of the expected values of the maximum excursion in a bounded random walk to estimate the random walk length from time series of eight independent global mean quantities (temperature maximum, summer lag, temperature minimum and winter lag in land and over the ocean) derived from the NOAA-CIRES twentieth century reanalysis (V2) for 1871-2008 and the ECHAM5 IPCC AR4 twentieth century run for 1860-2100, and also the Millenium 3100 yr control run mil01, which was segmented into records of specified period. The results for NOAA-CIRES, ECHAM5, and mil01 (mean of thirty 100 yr segments) are very similar and indicate a random walk length on land of 24 yr and over the ocean of 20 yr. Using three 1000 yr segments from mil01, the random walk lengths increased to 37 yr on land and 33 yr over the ocean. This result indicates that the shorter records may not totally capture the random variability of climate relevant on the time scale of civilizations, for which the random walk length is likely to be about 30 years. For this random walk length, the observed standard deviations of maximum temperature and minimum temperature yield respective expected maximum excursions on land of 1.4 and 2.3 degrees C and over the ocean of 0.5 and 0.7 degrees C, which are substantial fractions of the global warming signal. Citation: Bye, J., K. Fraedrich, E. Kirk, S. Schubert, and X. Zhu (2011), Random walk lengths of about 30 years in global climate, Geophys. Res. Lett., 38, L05806, doi: 10.1029/2010GL046333
alphaparrot/GPlaSim: Radiative Flexibility
No full text<p>Modifications necessary for a diversity of atmospheres, in particular with a wide range of pN2. A key modification is a change to how Rayleigh scattering is calculated, so that thick N2 atmospheres are quite reflective and opaque at altitudes above the surface. This version also contains modifications necessary for modelling tidally-locked planets.</p>
maureenjcohen/ExoPlaSim: New haze optical data and tutorial
No full text<p>The PlaSim 3D general climate model, extended for terrestrial planets. This model contains the PlaSim GCM, as well as all necessary modifications to run tidally-locked planets, planets with substantially different surface pressures than Earth, planets orbiting stars with different effective temperatures, super-Earths, and more. This model also includes the ability to compute carbon-silicate weathering, dynamic orography through the glacier module (though only accumulation and ablation/evaporation/melting are included; glacial flow and spreading are not), and storm climatology. Future features will include support for multiple celestial light sources (e.g. for a habitable moon orbiting a Jovian planet, or circumbinary planets), coupling with N-body integrators such as REBOUND, and CO2 condensation.</p>
<p>This release includes photochemical haze/dust transport and radiative transfer. Transport and radiative transfer schemes are described in <strong>"Haze optical depth in exoplanet atmospheres varies with rotation rate: Implications for observations,"</strong> Cohen et al. (2024).</p>
<p>Includes optical haze constants with corrected backscattering efficiencies, calculated based on data provided in He et al. 2023 and Corrales et al. 2023 for the stellar spectra of TRAPPIST-1 and Wolf 1061. A tutorial has been added demonstrating how to use the aerosol module, including references to the data sources.</p>
alphaparrot/ExoPlaSim
No full textThis release incorporates a large array of changes meant to allow PlaSim to model almost any vaguely Earth-like terrestrial planet in the habitable zone. Notably, the blackbody temperature of the parent star can be specified, or a high-resolution input spectrum can be specified. The albedos of ground, water, and snow/ice have been updated with high-resolution reflectance spectra from the JPL ECOSTRESS library of laboratory and analytic spectra. Both input and reflectance spectra are down-sampled to 2-band reflectivities and incident flux, but done so self-consistently (i.e. reflectivity is convolved with input spectrum). We have also added a stratosphere mode that is only accessible if NLEV>10, in which additional model layers are placed on top of the normal atmospheric structure (the lower atmosphere treatment is unchanged). This version of the model has been validated against CAM3, CAM4, LMDG, AM2, and CAM4_Wolf for Earth-like planets as well as tidally-locked planets around both M and G stars
The Impact of Seasonal and Meteorological Conditions on the Incidence of Thrombotic Haemodialysis Shunt Occlusions
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