Meaningful connection in virtual classrooms: graduate students’ perspectives on effective instructor presence in blended courses

This qualitative study explored 15 graduate students’ perspectives on effective online instructor presence. Analysis of interviews, a survey, and a focus group revealed students value early relationship-building through consistent participation, authentic personality-sharing, and learner-centered course design. Results indicate effective instructor presence fosters trust, satisfaction, engagement, and positive student mindsets while reducing stress and anxiety. Students preferred visible, accessible instructors who connect through prompt communication, constructive feedback, and active listening. Additional findings suggest leveraging synchronous interactions enhances social presence and relationship-building. However, disconnected instructor presence caused frustration and negative emotions. Overall, intentional instructor presence is critical for successful online instruction and profoundly shapes learners’ holistic experiences beyond solely academic goals. While limited to one program, these learner-centered insights provide a starting point for identifying high-impact presence-building strategies tailored to graduate contexts

Processing bodies oscillate in neuro 2A cells

Circadian rhythms are biological variables that oscillate with periods close to 24 h that are generated internally by biological clocks. Depending on the tissue/cell type, about 5–20% of genes are expressed rhythmically. Unexpectedly, the correlation between the oscillations of messengers and the proteins they encode is low. We hypothesize that these discrepancies could be because in certain phases of the circadian cycle some messengers could be translationally silenced and stored. Processing bodies (PBs) are membraneless organelles formed by ribonucleoprotein aggregates located in the cytoplasm. They contain silenced messengers and factors involved in mRNA processing. A previous work showed that the number of cells containing these mRNA granules varies when comparing two time-points in U2OS cell cultures and that these differences disappear when an essential clock gene is silenced. Here we evaluate whether PBs oscillate in Neuro2A cells. We analyzed in cell cultures synchronized with dexamethasone the variations in the number, the signal intensity of the markers used (GE-1/HEDLS and DDX6), and the area of PBs between 8 and 68 h post-synchronization. All three parameters oscillated with periods compatible with a circadian regulated process. The most robust rhythm was the number of PBs. These rhythms could be generated by oscillations in proteins that have been involved in the nucleation of these foci such as LSM1, TTP, and BRF1. The described phenomenon would allow to explain the differences observed in the temporal profiles of some messengers and their proteins and to understand how circadian clocks can control post-transcriptionally cellular functions.Fil: Malcolm, Melisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Química Biológica de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Centro de Investigaciones en Química Biológica de Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Química Biológica; ArgentinaFil: Saad, Lucia Florencia. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Química Biológica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones y Transferencia de Villa María. Universidad Nacional de Villa María. Centro de Investigaciones y Transferencia de Villa María; ArgentinaFil: Penazzi, Laura Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Química Biológica de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Centro de Investigaciones en Química Biológica de Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Química Biológica; ArgentinaFil: Garbarino Pico, Eduardo. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Química Biológica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Química Biológica de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Centro de Investigaciones en Química Biológica de Córdoba; Argentin

Automatic Construction of Evaluation Suites for Natural Language Generation Datasets

Machine learning approaches applied to NLP are often evaluated by summarizing their performance in a single number, for example accuracy. Since most test sets are constructed as an i.i.d. sample from the overall data, this approach overly simplifies the complexity of language and encourages overfitting to the head of the data distribution. As such, rare language phenomena or text about underrepresented groups are not equally included in the evaluation. To encourage more in-depth model analyses, researchers have proposed the use of multiple test sets, also called challenge sets, that assess specific capabilities of a model. In this paper, we develop a framework based on this idea which is able to generate controlled perturbations and identify subsets in text-to-scalar, text-to-text, or data-to-text settings. By applying this framework to the GEM generation benchmark, we propose an evaluation suite made of 80 challenge sets, demonstrate the kinds of analyses that it enables and shed light onto the limits of current generation models

A cross sectional study of maternal ‘near-miss’ cases in major public hospitals in Egypt, Lebanon, Palestine and Syria

The maternal near-miss approach has been increasingly used as a tool to evaluate and improve the quality of care in maternal health. We report findings from the formative stage of a World Health Organization (WHO) funded implementation research study that was undertaken to collect primary data at the facility level on the prevalence, characteristics, and management of maternal near-miss cases in four major public referral hospitals - one each in Egypt, Lebanon, Palestine and SyriaWHO Alliance grant (Implementation Research Protocol ID A65770)

Using heart rate profiles during sleep as a biomarker of depression

Background: Abnormalities in heart rate during sleep linked to impaired neuro-cardiac modulation may provide new information about physiological sleep signatures of depression. This study assessed the validity of an algorithm using patterns of heart rate changes during sleep to discriminate between individuals with depression and healthy controls. Methods: A heart rate profiling algorithm was modeled using machine-learning based on 1203 polysomnograms from individuals with depression referred to a sleep clinic for the assessment of sleep abnormalities, including insomnia, excessive daytime fatigue, and sleep-related breathing disturbances (n = 664) and mentally healthy controls (n = 529). The final algorithm was tested on a distinct sample (n = 174) to categorize each individual as depressed or not depressed. The resulting categorizations were compared to medical record diagnoses. Results: The algorithm had an overall classification accuracy of 79.9% [sensitivity: 82.8, 95% CI (0.73–0.89), specificity: 77.0, 95% CI (0.67–0.85)]. The algorithm remained highly sensitive across subgroups stratified by age, sex, depression severity, comorbid psychiatric illness, cardiovascular disease, and smoking status. Conclusions: Sleep-derived heart rate patterns could act as an objective biomarker of depression, at least when it cooccurs with sleep disturbances, and may serve as a complimentary objective diagnostic tool. These findings highlight the extent to which some autonomic functions are im

Pro-Inflammatory and Immunological Profile of Dogs with Myxomatous Mitral Valve Disease

Simple Summary Myxomatous mitral valve disease (MMVD) is the most commonly acquired cardiac disease in dogs and is responsible for congestive heart failure. In this research, some inflammatory, immunological, and echocardiographic parameters were evaluated in dogs affected by MMVD in order to assess the involvement of additional pathophysiological mechanisms during the disease. The main results revealed that inflammation parameters increased according to the severity of the disease and suggested that inflammatory activation may play an important role in cardiac remodeling associated with the progressive volumetric overload in MMVD. Also, a relative increase in Treg cells was detected, suggesting that they could represent a regulatory mechanism for limiting the inflammatory immune response. Myxomatous mitral valve disease (MMVD) is a very frequently acquired cardiac disease in dog breeds and is responsible for congestive heart failure (CHF). The involvement of the immune system and pro-inflammatory cytokines in dogs with CHF due to mitral valve disease has not yet been extensively investigated. Here, we investigate the role of pro-inflammatory cytokines and the dysfunction of the immune system in dogs with different stages of severity through the blood assessment of CD4(+)FoxP3(+)regulatory T cells (Treg) cells, leptin, tumor necrosis factor (TNF)-alpha, interleukin (IL)-1 beta and IL-6 pro-inflammatory cytokines, and immunological and echocardiographic parameters. A total of 36 cardiopathic dogs, 14 females and 22 males, with MMVD were included. Mean age and body weight (BW) at the time of enrollment were 10.7 +/- 2.77 years and 10.9 +/- 6.69 kg, respectively. For the comparison of the pro-inflammatory and immunological parameters, two groups of healthy dogs were also established. Control group 1 consisted of young animals (n. 11; 6 females and 5 males), whose age and mean weight were 4.1 +/- 0.82 years and 13.8 +/- 4.30 kg, respectively. Control group 2 consisted of elderly dogs (n. 12; 6 females and 6 males), whose age and BW were 9.6 +/- 0.98 years and 14.8 +/- 6.15 kg, respectively. Of particular interest, an increase in Treg cells was observed in the cohort of MMVD dogs, as compared to the healthy dogs, as Treg cells are involved in the maintenance of peripheral tolerance, and they are involved in etiopathogenetic and pathophysiological mechanisms in the dog. On the other hand, TNF-alpha, IL-1 beta, and IL-6 significantly increased according to the severity of the disease in MMVD dogs. Furthermore, the positive correlation between IL-6 and the left ventricle diastolic volume suggests that inflammatory activation may be involved in cardiac remodeling associated with the progressive volumetric overload in MMVD

UNEP-SETAC guideline on global land use impact assessment on biodiversity and ecosystem services in LCA

Purpose As a consequence of the multi-functionality of land, the impact assessment of land use in Life Cycle Impact Assessment requires the modelling of several impact pathways covering biodiversity and ecosystem services. To provide consistency amongst these separate impact pathways, general principles for their modelling are provided in this paper. These are refinements to the principles that have already been proposed in publications by the UNEP-SETAC Life Cycle Initiative. In particular, this paper addresses the calculation of land use interventions and land use impacts, the issue of impact reversibility, the spatial and temporal distribution of such impacts and the assessment of absolute or relative ecosystem quality changes. Based on this, we propose a guideline to build methods for land use impact assessment in Life Cycle Assessment (LCA). Results Recommendations are given for the development of new characterization models and for which a series of key elements should explicitly be stated, such as the modelled land use impact pathways, the land use/cover typology covered, the level of biogeographical differentiation used for the characterization factors, the reference land use situation used and if relative or absolute quality changes are used to calculate land use impacts. Moreover, for an application of the characterisation factors (CFs) in an LCA study, data collection should be transparent with respect to the data input required from the land use inventory and the regeneration times. Indications on how generic CFs can be used for the background system as well as how spatial-based CFs can be calculated for the foreground system in a specific LCA study and how land use change is to be allocated should be detailed. Finally, it becomes necessary to justify the modelling period for which land use impacts of land transformation and occupation are calculated and how uncertainty is accounted for. Discussion The presented guideline is based on a number of assumptions: Discrete land use types are sufficient for an assessment of land use impacts; ecosystem quality remains constant over time of occupation; time and area of occupation are substitutable; transformation time is Negligible; regeneration is linear and independent from land use history and landscape configuration; biodiversity and multiple ecosystem services are independent; the ecological impact is linearly increasing with the intervention; and there is no interaction between land use and other drivers such as climate change. These assumptions might influence the results of land use Life Cycle Impact Assessment and need to be critically reflected. Conclusions and recommendations In this and the other papers of the special issue, we presented the principles and recommendations for the calculation of land use impacts on biodiversity and ecosystem services on a global scale. In the framework of LCA, they are mainly used for the Assessment of land use impacts in the background system. The main areas for further development are the link to regional ecological models running in the foreground system, relative weighting of the ecosystem services midpoints and indirect land use.Fil: Koellner, Thomas . University of Bayreuth. Faculty of Biology, Chemistry and Geosciences; AlemaniaFil: De Baan, Laura. Institute for Environmental Decisions. Natural and Social Science Interface; SuizaFil: Beck, Tabea. University of Stuttgar. Department Life Cycle Engineering; AlemaniaFil: Brandão, Miguel. Joint Research Centre. Institute for Environment and Sustainability, Sustainability. Assessment Unit, European Commission; ItaliaFil: Civit, Bárbara María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mendoza. Instituto de Ciencias Humanas, Sociales y Ambientales; Argentina. Universidad Tecnológica Nacional. Facultad Regional Mendoza; ArgentinaFil: Margni, Manuele . École Polytechnique de Montréal. Département de génie chimique; CanadáFil: Milà i Canals, Llorenç. Unilever R&D. Safety and Environmental Assurance Centre; Reino UnidoFil: Saad, Rosie. École Polytechnique de Montréal. Département de génie chimique; CanadáFil: De Souza, Danielle Maia. Joint Research Centre. Institute for Environment and Sustainability, Sustainability. Assessment Unit, European Commission; ItaliaFil: Müller Wenk, Ruedi . University of St. Gallen. Institute for Economy and the Environment; Alemani

Characterization, antibacterial and toxicity evaluation of biosynthesized zinc oxide nanoparticles utilizing Eleuthrine bulbosa bulb extract

In the current study, Eleuthrine bulbosa bulb extract was utilized to synthesize zinc oxide nanoparticles (ZnO NPs) in a simple, sustainable, and environmentally friendly manner. The bioactive compounds of E. bulbosa extract were identified by gas chromatography-mass spectrometry (GC-MS). Following synthesis of the ZnO NPs via the green method with E. bulbosa bulb extract as the reducing and capping agent, ZnO NPs were characterized using X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Ultraviolet-Visible Spectroscopy (UV-Vis), and Photoluminescence (PL) further evaluated for antibacterial and cytotoxic activities. GC-MS analysis showed the presence of phytochemical compounds acting as reducing and capping agents. The UV-Vis spectra of ZnO nanoparticles containing E. bulbosa extract showed an optical energy bandgap between 3.12 and 3.89 eV. In addition, XRD showed that the crystalline size of ZnO NPs ranged from 21 to 68 nm with a wurtzite crystal structure. FTIR analysis showed that the plant extract contains identified functional groups including alcohols, phenols, alkene, and flavonoid compounds that influenced the mechanism of bonding with ZnO NPs. Particularly, the peaks of formation of Zn-O stretching vibrations at 470 to 480 cm-1 were successfully shown. In addition, ZnO NPs displayed antibacterial activity, which was greatest against Staphylococcus aureus, and were cytotoxic to MCF-7 and MCF-10A breast cells with IC50 values of 5.540 µg/mL and 15.77 µg/mL, respectively. ZnO NPs were successfully synthesized utilizing a green method, resulting in intriguing biocompatible potential candidates for use in both biomedical and environmental fields due to their eco-friendly synthesis and nontoxic