The COVID-19 pandemic compelled the global and abrupt conversion of conventional face-to-face instruction to the online format in many educational institutions. Urgent and careful planning is needed ...to mitigate negative effects of pandemic on engineering education that has been traditionally content-centered, hands-on and design-oriented. To enhance engineering online education during the pandemic, we conducted an observational study at California State University, Long Beach (one of the largest and most diverse four-year university in the U.S.). A total of 110 faculty members and 627 students from six engineering departments participated in surveys and answered quantitative and qualitative questions to highlight the challenges they experienced during the online instruction in Spring 2020. Our results identified various issues that negatively influenced the online engineering education including logistical/technical problems, learning/teaching challenges, privacy and security concerns and lack of sufficient hands-on training. For example, more than half of the students indicated lack of engagement in class, difficulty in maintaining their focus and Zoom fatigue after attending multiple online sessions. A correlation analysis showed that while semi-online asynchronous exams were associated with an increase in the perceived cheating by the instructors, a fully online or open-book/open-note exams had an association with a decrease in instructor's perception of cheating. To address various identified challenges, we recommended strategies for educational stakeholders (students, faculty and administration) to fill the tools and technology gap and improve online engineering education. These recommendations are practical approaches for many similar institutions around the world and would help improve the learning outcomes of online educations in various engineering subfields. As the pandemic continues, sharing the results of this study with other educators can help with more effective planning and choice of best practices to enhance the efficacy of online engineering education during COVID-19 and post-pandemic.
It is commonly held that what we see and what we believe we see are overlapping phenomena. However, dissociations between sensory events and their subjective interpretation occur in the general ...population and in clinical disorders, raising the question as to whether perceptual accuracy and its subjective interpretation represent mechanistically dissociable events. Here, we uncover the role that alpha oscillations play in shaping these two indices of human conscious experience. We used electroencephalography (EEG) to measure occipital alpha oscillations during a visual detection task, which were then entrained using rhythmic-TMS. We found that controlling prestimulus alpha frequency by rhythmic-TMS modulated perceptual accuracy, but not subjective confidence in it, whereas controlling poststimulus (but not prestimulus) alpha amplitude modulated how well subjective confidence judgments can distinguish between correct and incorrect decision, but not accuracy.
These findings provide the first causal evidence of a double dissociation between alpha speed and alpha amplitude, linking alpha frequency to spatiotemporal sampling resources and alpha amplitude to the internal, subjective representation and interpretation of sensory events.
•Neural mechanisms of visual processing and its interpretation are dissociable•Different alpha parameters can be selectively modulated by rhythmic-TMS•Individual alpha frequency causally shapes objective accuracy•Alpha amplitude predicts subjective confidence and metacognitive abilities
Di Gregorio, Trajkovic et al. empirically identify the neural substrates of objective accuracy and subjective representation and interpretation of sensory events, demonstrating that they can be causally dissociated. They show alpha frequency to engender discrete sensory sampling and alpha amplitude to shape perceptual decision-making processes.
Entrainment (increase) and modulation (shift) of intrinsic brain oscillations via rhythmic-TMS (rh-TMS) enables to either increase the amplitude of the individual peak oscillatory frequency, or ...experimentally slowing/accelerating this intrinsic peak oscillatory frequency by slightly shifting it. Both entrainment, and modulation of brain oscillations can lead to different measurable perceptual and cognitive changes. However, there are noticeable between-participant differences in such experimental entrainment outcomes.
The current study aimed at explaining these inter-individual differences in entrainment/frequency shift success. Here we hypothesize that the width and the height of the Arnold tongue, i.e., the frequency offsets that can still lead to oscillatory change, can be individually modelled via resting-state neural markers, and may explain and predict efficacy and limitation of successful rhythmic-TMS (rh-TMS) manipulation.
Spectral decomposition of resting-state data was used to extract the spectral curve of alpha activity, serving as a proxy of an individual Arnold tongue. These parameters were then used as predictors of the rh-TMS outcome, when increasing alpha-amplitude (i.e., applying pulse train tuned to the individual alpha frequency, IAF), or modulating the alpha-frequency (i.e., making alpha faster or slower by stimulating at IAF±1Hz frequencies).
Our results showed that the height of the at-rest alpha curve predicted how well the entrainment increased the intrinsic oscillatory peak frequency, with a higher at-rest spectral curve negatively predicting amplitude-enhancement during entrainment selectively during IAF-stimulation. In contrast, the wider the resting-state alpha curve, the higher the modulation effects aiming to shift the intrinsic frequency towards faster or slower rhythms.
These results not only offer a theoretical and experimental model for explaining the variance across different rh-TMS studies reporting heterogenous rh-TMS outcomes, but also introduce a potential biomarker and corresponding evaluative tool to develop most optimal and personalized rh-TMS protocols, both in research and clinical applications.
•Rhythmic-TMS entrainment outcomes can be predicted by EEG resting-state biomarkers.•The width of the power spectrum curve can predict off-peak entrainment outcomes.•The height of the power spectrum curve can predict at-peak entrainment outcomes.•Individual resting state power spectrum is a proxy of an individual Arnolde's tongue.
Alpha-band oscillatory activity over occipito-parietal areas is involved in shaping perceptual and cognitive processes, with a growing body of electroencephalographic (EEG) evidence indicating that ...pre-stimulus alpha-band amplitude relates to the subjective perceptual experience, but not to objective measures of visual task performance (discrimination accuracy). The primary aim of the present transcranial magnetic stimulation (TMS) study was to investigate whether causality can be established for this relationship, using rhythmic (alpha-band) TMS entrainment protocols. It was anticipated that pre-stimulus 10 Hz-TMS would induce changes in subjective awareness ratings but not accuracy, in the visual hemifield contralateral to TMS. To test this, we administered 10 Hz-TMS over the right intraparietal sulcus prior to visual stimulus presentation in 17 participants, while measuring their objective performance and subjective awareness in a visual discrimination task. Arrhythmic and 10 Hz sham-TMS served as control conditions (within-participant design). Resting EEG was used to record individual alpha frequency (IAF). A study conducted in parallel to ours with a similar design but reported after we completed data collection informed further, secondary analyses for a causal relationship between pre-stimulus alpha-frequency and discrimination accuracy. This was explored through a regression analysis between rhythmic-TMS alpha-pace relative to IAF and performance measures. Our results revealed that contrary to our primary expectation, pre-stimulus 10 Hz-TMS did not affect subjective measures of performance, nor accuracy, relative to control-TMS. This null result is in accord with a recent finding showing that for influencing subjective measures of performance, alpha-TMS needs to be applied post-stimulus. In addition, our secondary analysis showed that IAF was positively correlated with task accuracy across participants, and that 10 Hz-TMS effects on accuracy—but not awareness ratings—depended on IAF: The slower (or faster) the IAF, relative to the fixed 10 Hz TMS frequency, the stronger the TMS-induced performance improvement (or worsening), indicating that 10 Hz-TMS produced a gain (or a loss) in individual performance, directly depending on TMS-pace relative to IAF. In support of recent reports, this is evidence for alpha-frequency playing a causal role in perceptual sensitivity likely through regulating the speed of sensory sampling.
Alpha oscillations (7-13 Hz) are the dominant rhythm in both the resting and active brain. Accordingly, translational research has provided evidence for the involvement of aberrant alpha activity in ...the onset of symptomatological features underlying syndromes such as autism, schizophrenia, major depression, and Attention Deficit and Hyperactivity Disorder (ADHD). However, findings on the matter are difficult to reconcile due to the variety of paradigms, analyses, and clinical phenotypes at play, not to mention recent technical and methodological advances in this domain. Herein, we seek to address this issue by reviewing the literature gathered on this topic over the last ten years. For each neuropsychiatric disorder, a dedicated section will be provided, containing a concise account of the current models proposing characteristic alterations of alpha rhythms as a core mechanism to trigger the associated symptomatology, as well as a summary of the most relevant studies and scientific contributions issued throughout the last decade. We conclude with some advice and recommendations that might improve future inquiries within this field.
This paper is built on the assumption that architecture is the establishment of the relationship between past and future, built and unbuilt, within the inherited and natural context and in direct ...connection with the overall culture. Unlike a traditional approach to heritage generally limited to considering only the visible values of the place, this research stands on the belief that, in the context of heritage, the implementation and application of behavioral knowledge in architectural discourse contributes to the intensification and enhancement of these relations. In accordance with the need to re-examine existing and explore new forms of the relationship between future life of heritage and social wellbeing, the main goal of the research is to examine the possibility of improving this relationship through a value-based architectural programming methodological framework. This paper was conducted through: (1) theoretical framework that intertwines environment–behavior theories and architectural programming as the value-matrix methodology for the reuse of heritage; (2) exploring the established framework through design results gathered within the design-based studio on “heritage reprogramming” at the University of Belgrade—Faculty of Architecture with a particular focus on the modernist architectural heritage; and (3) discussing the overall principles through the multiscale and value-based approach. The evaluation of the results indicates the possibility of improving the social dimension of heritage protection and reuse, as well as the need to shift the focus from exclusively material and formal values of heritage to social and cultural aspects in accordance with the needs of contemporary society and culture. Results indicate that the multidimensional nature of architectural programming methodological approach in the context of modern heritage and, accordingly, the synergy of different programming values (environmental, human, social, systemic, temporal, economic, aesthetic) provides sustainable access to heritage and has the capacity to improve the social wellbeing of individual users but also of the wider community.
This article addresses the contemporary framework of housing at the EU level in the era of the ‘Housing at the Centre’ approach. More specifically, the research focuses on mass housing neighbourhoods ...(MHN) as the leading pattern of urban transformation in European cities in the second half of the 20th century, with the intention being to decode the possibilities for its rehabilitation in line with integrated approaches. The article combines (1) a review-based and systematically-oriented approach, in order to provide a state of the art of EU design taxonomy related to the housing issue, and, more specifically, related to MHN, with (2) a comparative study between EU and national design taxonomies, in order to address their conditionality and possible mismatches. The research considers design taxonomy to gain a more comprehensive insight into the content and coherence between programme values and the relevant EU documents (declarations, statements, policy positions, resolutions, reports, communications, charters, action plans, opinions) related to the housing issue, or broader urban issues that include housing as the scope of observation. The taxonomy enables a conceptual methodological framework for a systematic, consistent, and complete description of key research relations. Accordingly, the specific objective of this article is to establish an evaluation framework for reprogramming of MHN based on the EU design taxonomy through (1) the development of the programming matrix for evaluation, which corresponds to the value-based architectural programming model; and (2) introducing Serbian national design taxonomy, in order to demonstrate the anticipation of design values based on the EU taxonomy within the local context. The results indicate the need to examine and test regulatory experimental settings through middle-out approaches, whose central research perspective will be built parallel and coherently through bottom-up inputs, created as the result of collaborative approaches at the community level, and top-down inputs which are the result of the strategic framework established in relation to priorities at the European level.
Over the past decade, urban housing typologies have evolved from being a feature of modern life to an essential postmodern issue, questioning future housing identities. One of the ways in which ...architecture can become engaged in this ever-changing process of urban regeneration is to challenge the inherited traditional housing typologies with the newly recognized values of contemporary lifestyle. This paper presents research and design aimed at exploring contemporary sustainable urban lifestyles as a resource for positioning housing structures as cultural urban infrastructure. The main focus of this study is design principles and strategies for generating future housing identities in accordance with sustainable urban development and sustainability of life in urban areas. It is about finding housing conceptual models for an interaction between housing and identity as a response to the impact of increased cities, changed lifestyles in contemporary cities and the requirements for the preservation of the city image and the public space within the housing areas in the city center. The main goal of this study is to understand whether and how an architectural design can preserve a sustainability of life within the city center and become a valuable agent of place identity in the process of urban regeneration. The paper indicates that the contemporary development of society requires a new architectural paradigm, in which lifestyle and architecture create a unique elastic open-ended system with the ability to adapt and change over time and throughout the place.
The paper studies the relations between architecture, urbanism and structural anthropology, and makes a contribution to the interpretation of how the architects of former Yugoslavia translated ...structuralism into architectural theory and practice as a means of reading and shaping Yugoslav culture in the context of radical socio-political change. In striving for freedom of opinion, expression, communication and action, and autonomy of scientific and cultural practices, the Yugoslav society through its avant-garde cultural role initiated a shift of focus in urban culture towards semiotics, historicity, dialectics, creativity, criticism and a revival of the humanistic values of traditional culture. From this viewpoint, the paper examines the interests in theory and practice of the most influential Yugoslav architects in the context of structuralism: Mutnjakovic, Neidhardt, Grabrijan, Bogdanovic and Delalle. Their theoretical approaches effected a change of functionalist principles and values and advocated the return of values of the old city centre and vernacular architecture, specifically its vitality, symbolism, historical continuity, environmental values and diverse urban forms.
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