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Calibrated multi-model ensemble seasonal prediction of Bangladesh summer monsoon rainfall

Nachiketa Acharya Carlo Montes Timothy Joseph Krupnik (2023, [Artículo])

Bangladesh summer monsoon rainfall (BSMR), typically from June through September (JJAS), represents the main source of water for multiple sectors. However, its high spatial and interannual variability makes the seasonal prediction of BSMR crucial for building resilience to natural disasters and for food security in a climate-risk-prone country. This study describes the development and implementation of an objective system for the seasonal forecasting of BSMR, recently adopted by the Bangladesh Meteorological Department (BMD). The approach is based on the use of a calibrated multi-model ensemble (CMME) of seven state-of-the-art general circulation models (GCMs) from the North American Multi-Model Ensemble project. The lead-1 (initial conditions of May for forecasting JJAS total rainfall) hindcasts (spanning 1982–2010) and forecasts (spanning 2011–2018) of seasonal total rainfall for the JJAS season from these seven GCMs were used. A canonical correlation analysis (CCA) regression is used to calibrate the raw GCMs outputs against observations, which are then combined with equal weight to generate final CMME predictions. Results show, compared to individual calibrated GCMs and uncalibrated MME, that the CCA-based calibration generates significant improvements over individual raw GCM in terms of the magnitude of systematic errors, Spearman's correlation coefficients, and generalised discrimination scores over most of Bangladesh areas, especially in the northern part of the country. Since October 2019, the BMD has been issuing real-time seasonal rainfall forecasts using this new forecast system.

Multi-Model Ensemble Seasonal Forecasting CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA CLIMATE SERVICES FORECASTING MONSOONS

Gender, rainfall endowment, and farmers’ heterogeneity in wheat trait preferences in Ethiopia

Hom Nath Gartaula Moti Jaleta (2024, [Artículo])

Wheat is a vital cereal crop for smallholders in Ethiopia. Despite over fifty years of research on wheat varietal development, consideration of gendered trait preferences in developing target product profiles for wheat breeding is limited. To address this gap, our study used sex-disaggregated survey data and historical rainfall trends from the major wheat-growing regions in Ethiopia. The findings indicated heterogeneity in trait preferences based on gender and rainfall endowment. Men respondents tended to prefer wheat traits with high straw yield and disease-resistance potential, while women showed a greater appreciation for wheat traits related to good taste and cooking quality. Farmers in high rainfall areas seemed to prioritize high straw yield and disease resistance traits, while those in low rainfall areas valued good adaptation traits more highly. Most of the correlation coefficients among the preferred traits were positive, indicating that farmers seek wheat varieties with traits that serve multiple purposes. Understanding men's and women's preferences and incorporating them in breeding and seed systems could contribute to the development of more targeted and effective wheat varieties that meet the diverse needs of men and women farmers in Ethiopia.

Trait Preferences Multivariate Probit Model CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA WHEAT AGRONOMIC CHARACTERS GENDER RAINFALL PROBIT ANALYSIS

Towards an Emotional Validation of Heuristic Approaches for Usability Evaluation

YAZMIN MAGALLANES VELAZQUEZ ARIEL MOLINA RUEDA JOSE ALFREDO SANCHEZ HUITRON MARIBEL YENNY MENDEZ BERNAL (2012, [Artículo])

Este artículo presenta una investigación inicial sobre las maneras en que la evaluación emocional de interfaces de usuario puede extender y validar la evaluación heurística de sistemasinteractivos. Mediante la recolección de respuestas de dos grupos de usuarios, este trabajo seenfoca a detectar si existe una correlación entre la evaluación emocional de aspectos específicos de interfaces de usuario y la evaluación correspondiente realizada por expertos en interacción. Primero se obtuvo retroalimentación de expertos en interacción acerca de los problemas potenciales de una interfaz multi-táctil, con base en un enfoque heurístico. Posteriormente, se plantearon escenarios para observar a usuarios inexpertos y obtener respuestas emocionales a los aspectos considerados problemáticos por los expertos. Nuestros hallazgos iniciales indican que hay una correlación importante entre los aspectos problemáticos señalados por los expertos y las respuestas emocionales de los usuarios inexpertos, pero también que algunos de los aspectos problemáticos no necesariamente implican emociones negativas duraderas. Sugerimos entonces que una evaluación emocional de sistemas interactivos puede enriquecer y validar los enfoques heurísticos para evaluación de usabilidad.

This paper presents an initial investigation on how an emotional assessment of user interfaces may extend and validate the heuristic evaluation of the usability of interactive systems. Through the elicitation of responses from two groups of users, we focused on detecting whether a correlation exists between emotional assessment of specific interface issues and the corresponding evaluation by interaction experts. Using a prototypical multi-tactile interface and a heuristic

approach, we first obtained feedback from interaction experts regarding its potential problems and issues. We then devised scenarios for observing novel users and eliciting their emotional responses to the issues raised by our experts. Our initial findings indicate a significant correlation exists between the issues raised by expert users and the emotional responses of novel users, but also that some of those issues do not necessarily lead to long lasting negative emotions. We thus posit that emotional evaluation of interactive systems may be helpful for enriching and validating heuristic approaches for usability evaluation.

INGENIERÍA Y TECNOLOGÍA Usabilidad Evaluación emocional Evaluación Heurística Interfaces multi-táctiles Usability Emotional evaluation Heuristic evaluation Multi-tactile interfaces

Using Observed Residual Error Structure Yields the Best Estimates of Individual Growth Parameters

Marcelo Vidal Curiel Bernal EUGENIO ALBERTO ARAGON NORIEGA MIGUEL ANGEL CISNEROS MATA LAURA SANCHEZ VELASCO SYLVIA PATRICIA ADELHEID JIMENEZ ROSENBERG ALEJANDRO FRANCISCO PARES SIERRA (2021, [Artículo])

"Obtaining the best possible estimates of individual growth parameters is essential in studies of physiology, fisheries management, and conservation of natural resources since growth is a key component of population dynamics. In the present work, we use data of an endangered fish species to demonstrate the importance of selecting the right data error structure when fitting growth models in multimodel inference. The totoaba (Totoaba macdonaldi) is a fish species endemic to the Gulf of California increasingly studied in recent times due to a perceived threat of extinction. Previous works estimated individual growth using the von Bertalanffy model assuming a constant variance of length-at-age. Here, we reanalyze the same data under five different variance assumptions to fit the von Bertalanffy and Gompertz models. We found consistent significant differences between the constant and nonconstant error structure scenarios and provide an example of the consequences using the growth performance index _0 to show how using the wrong error structure can produce growth parameter values that can lead to biased conclusions. Based on these results, for totoaba and other related species, we recommend using the observed error structure to obtain the individual growth parameters."

multimodel inference, error structure, totoaba, growth performance BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA BIOLOGÍA ANIMAL (ZOOLOGÍA) FISIOLOGÍA ANIMAL FISIOLOGÍA ANIMAL