Mobile Usability: An Experiment to Check Whether Current Mobile Devices are Ready to Support Frames and iFrames

Frames have traditionally been identified as a usability issue in websites for computers. Literature points out that they may also be a problem for mobile websites but no studies have been carried out to prove it. Since mobile devices have changed a lot in recent years, it is necessary to check whether frames are still a problem for those devices. In this paper we have performed an experiment with twenty-two mobile devices, to test whether the content can be showed in their browsers, as well as their behavior with different configuration of frames and iframes and whether behavior of bookmarks and the back button is correct or not. The results show that frames and iframes should be avoided in mobile devices because they can cause many problems, which are explained in detail in this paper

Evaluation of psychomotor skills acquired for surgery by veterinary students using biological simulators

This study aimed to evaluate the acquisition of psychomotor skills using biological simulators in surgical practices by thirdyear students of Veterinary Medicine at the Autonomous Metropolitan University, Mexico City. The Gibson Spiral Test was applied pre- and post-practice to 171 students (92 women, 79 men) between 18 and 38 years old. The techniques practiced were: ligature, synthetic skin, enterotomy, enterectomy, gastrostomy, cystotomy, endotracheal tube placement, permanent intravenous catheter. Students were classified as fast-accurate (FA), fast- inaccurate (FI), slow-accurate (SA), and slow-inaccurate (SI). The test duration decreased by 7.91s (P0.10). There were differences among the fast (F) and slow (S) students pre-practice (P0.10). Comparing practice time difference (P=0.007) between slow and fast in the pre-practice, men performed more quickly in pre-practice and after practice (P<0.0001), with no differences in mean number of errors pre- (P=0.662) and post-practice (P=0.962). We conclude that students showed progress in acquiring motor skills, by increasing their speed and reducing errors, thus increasing the number of fast and accurate students. Men outperformed women

Development of a Social Gamified Platform for e-Learning

The way in which nowadays education is evolving, makes it possible to associate it with MOOCs courses and gamification techniques to improve learning outcomes of students. To this end, this paper shows the development of an educational e-learning platform built upon the Elgg social framework, where a set of gamification elements were added: Points, achievements, leaderboards and rewards. For the future, effectiveness validations will be carried out with students as well as further developments with other types of gamification elements

Mobile Instant Messaging Apps: Usability Evaluation on iOS and Android Platforms and Recommendations for Developers

With the current growth in the use of smartphone devices, and the large amount of Mobile Instant Messaging applications available in the markets, this co-occurrence makes it highly valuable to evaluate the usability of this kind of applications in order to provide more satisfying user experiences. Within this paper, a systematic usability evaluation of Mobile Instant Messaging applications is presented, which will be applied to both iOS and Android platforms. Based on the results, it is suggested that this type of mobile applications present serious problems in performing tasks, poor user interfaces and lack of information about privacy and security features. Likewise, along with the results, this paper presents a list of usability recommendations to help developers improve their Instant Messaging applications

Óptimos técnicos para la producción de leche y carne en el sistema bovino de doble propósito del trópico mexicano

Se presenta información útil y relevante en términos de economía y producción como herramienta para la toma de desicionesEl objetivo de este estudio fue estimar y analizar los resultados obtenidos de una función de producción de leche y carne en unidades de producción del sistema de doble propósito (DP). Los datos se obtuvieron a través de encuestas mensuales, donde se registró información de producción de leche, carne, ingresos y egresos económicos, durante 12 meses. Las funciones se estimaron por el método indirecto de regresión lineal con datos transformados para una función Cobb-Douglas. La función para leche mostró que los insumos alimento y vacas explican el 91 % de la producción, con coeficientes de elasticidad de 0.34 y 0.5, productos marginales de 0.75 y 892.2 con valores de $4.03 y$4,800.2 respectivamente. Los insumos utilizados para la producción de leche se encuentran en la etapa II de producción con rendimientos marginales decrecientes, mientras que para la producción de carne los insumos alimento y vacas explican el 72 % de la producción, con coeficientes de elasticidades de producción de -0.20 y 1.11 respectivamente; el alimento se ubicó en la etapa III de producción con rendimientos marginales negativos, y el insumo vacas se encontró en la etapa I con rendimientos marginales crecientes. La suma de los coeficientes de ambas funciones que fueron 0.92 y 0.91 por ser menores a uno, tienen rendimientos decrecientes a escala. El nivel óptimo técnico de producción fue de 488.97 L diarios y 10 becerros al año. Los insumos para producción de leche se están utilizando de forma racional, pero se debe evaluar la cantidad de alimento utilizada para producción de carne, ya que refleja que es sobre utilizado

Metabolic rate and hypoxia tolerance in Girardinichthys multiradiatus (Pisces: Goodeidae), an endemic fish at high altitude in tropical Mexico

Artículo científico JCR Q1The darkedged splitfin (Amarillo fish), Girardinichthys multiradiatus is a vulnerable endemic fish species inhabiting central Mexico's high altitude Upper Lerma Basin, where aquatic hypoxia is exacerbated by low barometric pressures (lower PO2s), large aquatic oxygen changes, poor aquatic systems management and urban, agricultural and industrial pollution. The respiratory physiology of G. multiradiatus under such challenging conditions is unknown - therefore the main goal of the present study was to determine metabolic rates and hypoxia tolerance to elucidate possible physiological adaptations allowing this fish to survive high altitude and increasingly eutrophic conditions. Fish came from two artificial reservoirs – San Elías and Ex Hacienda - considered refuges for this species. Both reservoirs showed high dial PO2 variation, with hypoxic conditions before midday and after 20:00 h, ~4 h of normoxia (15 kPa) from 16:00–20:00, and ~4 h of hyperoxia (16–33 kPa) from 12:00–16:00. Standard metabolic rate at 20 ± 0.5 °C of larvae from Ex Hacienda was significantly higher than those from San Elías, but these differences disappeared in juveniles and adults. Metabolic rate at 20 ± 0.5 °C for adults was 9.8 ± 0.1 SEM μmol O2/g/h. The metabolic scaling exponent for adults was 0.58 for San Elías fish and 0.83 for Ex Hacienda fish, indicating possible ecological effects on this variable. Post-larval fish in Ex Hacienda and all stages in San Elias site showed considerable hypoxia tolerance, with PCrit mean values ranging from 1.9–3.1 kPa, lower than those of many tropical fish at comparable temperatures. Collectively, these data indicate that G. multiradiatus is well adapted for the hypoxia associated with their high-altitude habitat.CONACyT PRODEP-SEP UAEMé

Improving deep learning performance with missing values via deletion and compensation

Proceedings of: International Work conference on the Interplay between Natural and Artificial Computation (IWINAC 2015)Missing values in a dataset is one of the most common difficulties in real applications. Many different techniques based on machine learning have been proposed in the literature to face this problem. In this work, the great representation capability of the stacked denoising auto-encoders is used to obtain a new method of imputating missing values based on two ideas: deletion and compensation. This method improves imputation performance by artificially deleting values in the input features and using them as targets in the training process. Nevertheless, although the deletion of samples is demonstrated to be really efficient, it may cause an imbalance between the distributions of the training and the test sets. In order to solve this issue, a compensation mechanism is proposed based on a slight modification of the error function to be optimized. Experiments over several datasets show that the deletion and compensation not only involve improvements in imputation but also in classification in comparison with other classical techniques.The work of A. R. Figueiras-Vidal has been partly supported by Grant Macro-ADOBE (TEC 2015-67719-P, MINECO/FEDER&FSE). The work of J.L. Sancho-Gómez has been partly supported by Grant AES 2017 (PI17/00771, MINECO/FEDER)

The state of psychological treatments for social anxiety disorder in children and adolescents: An Umbrella Review

Estado de los tratamientos psicológicos para el Trastorno de Ansiedad Social en población infanto-juvenil: Revisión de revisiones. El Trastorno de Ansiedad Social (TAS) es un trastorno muy común en la infancia y adolescencia. Muchos estudios han analizado los diferentes tipos de Terapia Cognitivo-Conductual (TCC) para dicho trastorno, pero ello hace necesario estudiar la eficacia de TCC. El objetivo de esta revisión de revisiones es determinar que tratamientos y que factores son más eficaces para el TAS en población infanto-juvenil. Se realizó una revisión de revisiones sobre la efectividad de las intervenciones psicológicas para tratar el TAS en niños y adolescentes. Para ello, se realizó una búsqueda en nueve bases de datos utilizando una combinación de palabras clave. El riesgo de sesgo se evaluó mediante la herramienta AMSTAR-2. Se seleccionaron y analizaron seis revisiones sistemáticas y meta-análisis. Todos los estudios seleccionados evaluaron la eficacia de la TCC en niños y adolescentes con SAD, demostrando su efectividad a corto y largo plazo. Los componentes que parecen ser más efectivos son la exposición en cualquier modalidad y el entrenamiento en habilidades sociales. Otras consideraciones a tener en cuenta se abordan en la discusiónSocial Anxiety Disorder (SAD) is a very common disorder in childhood and adolescence. Many studies have examined various types of Cognitive Behavioral Therapy (CBT), meaning there is a need for a study exploring the efficacy of CBT. The objectives of this study are to determine what treatments and factors can improve treatment outcomes for SAD. We performed an umbrella review of the effectiveness of psychological interventions in treating SAD in children and adolescents. Nine databases were searched using a combination of keywords. Risk of bias was assessed using AMSTAR-2. Six systematic reviews and meta-analysis were selected and reported. All of those studies assessed the efficacy of CBT in children and adolescents with SAD, demonstrating its short- and long-term effectiveness. The components that seem to be most effective are exposure in any modality and social skills training. Other considerations to take into account are addressed in the discussio

Use of Pleurotus pulmonarius to change the nutritional quality of wheat straw. I. effect on chemical composition

The effect of Pleurotus pulmonarius on the chemical composition of wheat straw was evaluated. Wheat straw, treated and untreated with P. pulmonarius, was obtained from a commercial facility. Ten samples plastic bags of wheat straw used previously as substrate to culture edible fungus were collected at random. The negative control group consisted of the pasteurized wheat straw untreated with P. pulmonarius. All samples were analyzed to determine dry matter, organic matter, crude protein, neutral detergent fiber, acid detergent fiber, cellulose and hemicellulose of each wheat straw. Data were analyzed by mean comparison using a t-Student test. No differences (P>0.05) between treatments were found for dry matter, crude protein and hemicellulose; however, straw treated with P. pulmonarius showed higher percentages (P<0.05) of organic matter, neutral and acid detergent fiber. It is concluded that growing P. pulmonarius in wheat straw improves the chemical composition of the straw by increasing its organic matter content and modifies the fiber structure, which increases the soluble carbohydrates content