Intelligent control of HVAC systems. Part I: Modeling and synthesis

This is the first part of a work on intelligent type control of Heating, Ventilating and Air-Conditioning (HVAC) systems. The study is performed from the perspective of giving a unitary control method to ensure high energy efficiency and air quality improving. To illustrate the proposed HVAC control technique, in this first part it is considered as benchmark problem a single thermal space HVAC system. The construction of the mathematical model is performed only with a view to obtain a framework of HVAC intelligent control validation by numerical simulations. The latter will be reported in a second part of the study

EXPLORING ASSOCIATIONS BETWEEN SELF-EFFICACY, WORK ENGAGEMENT AND BEHAVIORAL INTENTION TO USE GAMIFICATION

Along with the growing interest and the continuous development in technology, gamification gained more recognition in the educational areas. While knowledge concerning gamified approaches and their advantages in the classroom are better understood for student populations, less is investigated in terms of factors that drive teachers to use such approaches in the classroom. The present study investigated the associations between self-efficacy, teachers’ work engagement, and behavioral intention to use gamification among 170 teachers, aged between 18 to 64 years old (M = 34.9; SD = 9.69), with a teaching experience ranging from almost one year to 44 years of experience (M = 8.71; SD = 9.62). Correlation analyses showed that there are associations between teachers’ self-efficacy, teachers’ work engagement, and behavioral intention to use gamification. This study showed that there are significant associations between self-efficacy, work engagement, and the behavioral intention to use gamification. These results stress out the need for more investigations on the personal characteristics of teachers that may be related to the use of gamified approaches in the classroom

WHAT ENDORSES TEACHERS TO USE GAMIFIED APPROACHES IN THEIR CLASSROOMS: SELF-EFFICACY TECHNOLOGY PROFICIENCY, AND PERCEIVED USEFULNESS

Gamified approaches in the classroom gained more consideration in the recent years. Although the benefits of evolving technologies integrated in the teaching process are better recognized for the student population, what enhances the adoption of such technologies from the teachers` perspective is less investigated. The present study investigated the associations between self-efficacy, teachers’ technology proficiency, perceived usefulness of gamification and behavioral intention to use gamification among 170 teachers, aged between 18 to 64 years old (M = 34.9; SD = 9.69), with a teaching experience ranging from almost one year to 44 years of experience (M = 8.71; SD = 9.62). Correlation analyses showed that there are associations between teachers’ self-efficacy, teachers’ technology proficiency, and perceived usefulness of gamification levels and behavioral intention to use gamification. Furthermore, the mediation analyses showed that technology proficiency level and perceived usefulness of gamification partially mediate the relationship between self-efficacy and the behavioral intention to use gamification among Romanian k-12 inservice teachers. These results advanced our knowledge about the relationship between self-efficacy and the behavioral intention to use gamification and its underlying mechanism

Atomic Force Microscopy Probing and Analysis of Polyimide Supramolecular Systems for Sensor Devices

A series of polyimide supramolecular systems containing different amounts of azochromophore were tested as flexible supports that can be used in the fabrication of certain devices, such as sensors for monitoring the temperature changes, by coating them with conductive metals. That is why it is required to have good interfacial compatibility between the flexible substrate and the inorganic layer. The interface of the sensor elements must be designed in such a way as to improve the sensitivity, accuracy, and response time of the device. Laser irradiation is one of the commonly employed techniques used for surface adaptation by patterning polyimides to increase contact and enhance device reliability and signal transmission. In this context, this work highlights unreported aspects arising from the azo-polyimide morphology, local nanomechanical properties and wettability, which are impacting the compatibility with silver. The texture parameters indicate an improvement of the modulations’ quality arising after laser irradiation through the phase mask, increasing the bearing capacity, fluid retention, and surface anisotropy when the amount of the azochromophore increases. The force curve spectroscopy and wettability studies indicated that the modification of the polymer morphology and surface chemistry lead to a better interfacial interaction with the metal lines when the azo component and the polyamidic acid are in equimolar quantities

Polyimide-Derived Supramolecular Systems Containing Various Amounts of Azochromophore for Optical Storage Uses

The progress of digital technologies demands more speed and larger storage capacity. Optical storage systems have the advantage of being cheap, fast and capacious. This article explores the potential use of polyimide-based films as a recording medium for optical storage devices. The materials were designed through a host–guest approach that involves a cyano-containing polyimide precursor and an azochromophore combined in the following ratios: 1:0.25, 1:0.5, 1:0.75 and 1:1. After thermal treatment up to 200 °C, polyimide systems were formed with supramolecular structures constructed via hydrogen bonding as shown by molecular modeling and FTIR at around 3350 cm−1. The aspects arising from the variation of the azo-dye content in the polyimide samples and their impact on the vitrification temperature, colorimetric features, refractive index, band gap, non-linear optical susceptibility and birefringence were investigated for the first time. The thermal analysis indicated a slight decrease in the vitrification temperature from 190.84 °C for the sample without azo dye to 163.91 °C for the film containing the highest leading of azo dye. The morphology images revealed the occurrence of periodic structures in azo-derived materials exposed to a UV laser, which is accentuated by the addition of more azo dye molecules. Optical tests allowed observation of the increase in the dominant wavelength, refractivity and optical conductivity of the samples, produced by the incorporation of azochromophore and laser irradiation. The photo-generated birefringence increased from 0.014 (sample with 1:0.25) to 0.036 (sample with 1:1), which in combination with the created regular topography pattern, is essential for the use of these materials as recording media in optical storage applications

Social and Emotional Learning and Internalizing Problems among Adolescents: The Mediating Role of Resilience

(1) Background: The high rates of mental disorders in adolescence presented in the literature often exclude internalizing problems. Although there is extensive data on the effectiveness of SEL skills in improving resilience, few studies included evidence in their reports on the relationship between SEL skills and internalizing problems. The present study aims to deepen the understanding of the relationship between SEL, resilience, and internalizing problems, by investigating the mediating effect of resilience between SEL components and internalizing problems. (2) Methods: Adolescents (N = 968 adolescents, aged between 11 and 18 years old; M = 13.30; SD = 1.92) from 30 schools from the NE region of Romania were invited to fill out questionnaires on social and emotional learning, internalizing problems, and resilience. (3) Results: The results show that resilience mediates the link between self-awareness and internalizing problems, between self-management and internalizing problems, between relationship skills and internalizing problems, and between responsible decision-making and internalizing problems. (4) Conclusions: These findings revealed the need for social and emotional learning interventions that include resilience-oriented approaches in order to decrease internalizing problems in adolescents. Moreover, we suggest that more culturally appropriate interventions are required to better investigate the interaction between SEL components, resilience, and internalizing problems

Multi-anticoagulant and EDTA dependent pseudothrombocytopenia. Case reports on two pediatric patients

Pseudotrombocitopenia este o anomalie in vitro legată de recoltarea probei de sânge, care poate conduce în mod eronat la diagnosticarea unei afecțiuni mai grave și anume trombocitopenia. Acest fenomen apare atunci când anticoagulantul folosit pentru recoltarea probelor de sânge în vederea testării acestora cauzează agregarea trombocitară, mimând astfel un număr scăzut de trombocite fără ca pacientul să prezinte semnele clinice ale unei trombocitopenii. Această anomalie poate determina efectuarea unor investigatii inutile, costisitoare și invazive, și chiar instituirea unui tratament nejustificat. În acest articol prezentăm două cazuri de pseudotrombocitopenie diagnosticată la pacienți pediatrici

Immunogenetic Background of Chronic Lymphoproliferative Disorders in Romanian Patients—Case Control Study

Background and Objectives: The implications of the genetic component in the initiation and development of chronic lymphoproliferative disorders have been the subject of intense research efforts. Some of the most important genes involved in the occurrence and evolution of these pathologies are the HLA genes. The aim of this study is to analyze, for the first time, possible associations between chronic lymphoproliferative diseases and certain HLA alleles in the Romanian population. Materials and Methods: This study included 38 patients with chronic lymphoproliferative disorders, diagnosed between 2021 and 2022 at Fundeni Clinical Institute, Bucharest, Romania, and 50 healthy controls. HLA class I and class II genes (HLA-A/B/C, HLA-DQB1/DPB1/DRB1) were investigated by doing high resolution genotyping using sequence specific primers (SSP). Results: Several HLA alleles were strongly associated with chronic lymphoproliferative disorders. The most important finding was that the HLA-C*02:02 (p = 0.002, OR = 1.101), and HLA-C*12:02 (p = 0.002, OR = 1.101) have a predisposing role in the development of chronic lymphoproliferative disorders. Moreover, we identified that HLA-A*11:01 (p = 0.01, OR = 0.16), HLA-B*35:02 (p = 0.037, OR = 0.94), HLA-B*81:01 (p = 0.037, OR = 0.94), HLA-C*07:02 (p = 0.036, OR = 0.34), HLA-DRB1*11:01 (p = 0.021, OR = 0.19), and HLA-DRB1*13:02 (p = 0.037, OR = 0.94), alleles have protective roles. Conclusions: Our study indicates that HLA-C*02:02 and HLA-C*12:02 are positively associated with chronic lymphoproliferative disorders for our Romanian patients while HLA-DRB1*11:01, HLA-DRB1*13:02, and HLA-B*35:02 alleles have a protective role against these diseases

Social support and help-seeking worldwide

Social support has long been associated with positive physical, behavioral, and mental health outcomes. However, contextual factors such as subjective social status and an individual’s cultural values, heavily influence social support behaviors (e.g., perceive available social support, accept support, seek support, provide support). We sought to determine the current state of social support behaviors and the association between these behaviors, cultural values, and subjective social support across regions of the world. Data from 6,366 participants were collected by collaborators from over 50 worldwide sites (67.4% or n = 4292, assigned female at birth; average age of 30.76). Our results show that individuals cultural values and subjective social status varied across world regions and were differentially associated with social support behaviors. For example, individuals with higher subjective social status were more likely to indicate more perceived and received social support and help-seeking behaviors; they also indicated more provision of social support to others than individuals with lower subjective social status. Further, horizontal, and vertical collectivism were related to higher help-seeking behavior, perceived support, received support, and provision of support, whereas horizontal individualism was associated with less perceived support and less help-seeking and vertical individualism was associated with less perceived and received support, but more help-seeking behavior. However, these effects were not consistently moderated by region. These findings highlight and advance the understanding of how cross-cultural complexities and contextual distinctions influence an individual's perception, processing, and practice of social support embedded in the changing social landscape.</p