Maximal Subalgebras of MVn-algebras. A Proof of a Conjecture of A. Monteiro

For each integer n ≥ 2, MV_n denotes the variety of MV-algebras generated by the MV-chain with n elements. Algebras in MV_n are represented as continuous functions from a Boolean space into a n-element chain equipped with the discrete topology. Using these representations, maximal subalgebras of algebras in MV_n are characterized, and it is shown that proper subalgebras are intersection of maximal subalgebras. When A ∈ MV₃, the mentioned characterization of maximal subalgebras of A can be given in terms of prime filters of the underlying lattice of A, in the form that was conjectured by A. Monteiro. Mathematics Subject Classification (2000): 06D30, 06D35, 03G20, 03B50, 08A30. Presented by Daniele Mundici     

Motor activity and spatial proximity: Relationships to infant emotions and maternal postpartum depression

The ability to express emotions is a protective factor for infant development. Despite the multimodal nature of emotion expression, research has mainly focused on facial expressions of emotions. The present study examined motor activity and spatial proximity in relation to positive and negative infant facial expressions and maternal postpartum depression during face-to-face interactions at four months. Video cameras and a motion capture system recorded mother-infant interactions. Repeated measures ANOVAs were conducted to analyze the effect of micro-coded infant positive and negative facial affect and maternal depression diagnosis on automatically extracted measures of motor activity and spatial proximity, including speed of mothers’ arm movements (nondepressed = 32; PPD = 16), and infants’ arm movements (nondepressed = 29; PPD = 17), and head distance (nondepressed = 45; PPD = 27). Results showed that the speed of infants’ arm movements and head distance were greater during negative compared to positive infant affect. Further, the results demonstrated that the speed of PPD mothers’ arm movements was slower than the speed of nondepressed mothers’ arm movements. In the discussion, it is suggested that increased speed of infant arm movements during negative affect functions to elicit faster caregiving responses, and that increased head distance during negative infant affect functions to decrease the intensity of the interaction. Finally, the slower speed of arm movements in PPD mothers suggests psychomotor retardation, which is proposed to limit these mothers’ abilities to engage their infants during the interaction.     

“LANDSCAPE PLOTTED AND PIECED”: EXPLORING THE CONTOURS OF ENGAGEMENT BETWEEN (NEURO)SCIENCE AND THEOLOGY

This article—the first of a linked set of three outlining the development and practice of a different approach to science/religion dialogue—begins with an overview of some persistent tensions in the field. Then, using a threefold heuristic of encounter, engagement, and expression, it explores the routes taken by James Ashbrook and Andrew Newberg to develop a dialogue between theology and neuroscience, discussing some of the problems associated with these and their implications for attempts to further develop neurotheology. Finally, it proposes a different way of thinking about this enterprise and points toward a new methodology for supporting this endeavor.     

Notes on Logics of Metric Spaces

In [14], we studied the computational behaviour of various first-order and modal languages interpreted in metric or weaker distance spaces. [13] gave an axiomatisation of an expressive and decidable metric logic. The main result of this paper is in showing that the technique of representing metric spaces by means of Kripke frames can be extended to cover the modal (hybrid) language that is expressively complete over metric spaces for the (undecidable) two-variable fragment of first-order logic with binary pred-icates interpreting the metric. The frame conditions needed correspond rather directly with a Boolean modal logic that is, again, of the same expressivity as the two-variable fragment. We use this representation to derive an axiomatisation of the modal hybrid variant of the two-variable fragment, discuss the compactness property in distance logics, and derive some results on (the failure of) interpolation in distance logics of various expressive power. Presented by Melvin Fitting     

What Differences Do They See? Using Mixed Methods to Capture Adolescent Perceptions of Neighborhood Contexts

Recent neighborhood research emphasizes the importance of individuals’ perceptions of their neighborhoods, as well as expands the definition of “neighborhood” to include the different contexts encountered during routine daily activities (Coulton et al., 2013; Kwan, 2012). The present study uses qualitative interviews, sketch mapping, and survey data to explore adolescents’ experiences of different neighborhoods within their activity space. Participants included 55 racially diverse youth aged 11–19 (M = 14.64, SD = 2.33) who resided in low-income neighborhoods in a small city in the Midwest. The majority reported spending time in multiple self-defined neighborhoods, noting significant differences between neighborhoods on collective efficacy, street code, and on participant-generated dimensions. Self-defined neighborhoods did not correspond to Census tracts, and Census indicators were not associated with youth's perceptions (e.g., collective efficacy, street code). Youth spent time in neighborhoods that differed significantly on multiple Census indicators of structural disadvantage, though within-individual differences tended to be small in magnitude. Type of routine activity was largely not predictive of distance traveled from home, though some findings suggest youth were more likely to cross neighborhood boundaries to engage in structured activities compared to different unstructured activities. Implications for neighborhood research and interventions are discussed.     

Experimental manipulation of maternal proximity during short sequences of sleep and infant calming response

This study aimed to understand how different mother-infant sleeping arrangements impact infants’ self-regulation, particularly their calming response. Thus this study investigated the effect of three prevalent mother-infant sleeping arrangements, co-sleeping (CS), sleeping beyond arm’s length from their mother (BAL), and solitary sleeping (SS), on infants’ physiological calming through self-regulation during a nap session in 24 infants (50% female, M = 1.85 months SD = 0.93 months), who were identified as either regular co-sleepers with their mothers, infants who slept in the BAL sleeping arrangement from their mother, and infants who are solitary sleepers (SS). The effect of all three sleeping conditions amongst all the three types of infants with different habitual sleeping arrangements was assessed. All infants spent 10 min (2 × 5 min sessions) in each sleeping condition (CS, BAL, SS) during which electrocardiographic recordings were collected to obtain interbeat intervals (IBI) and rMSSD, a measure of heart rate variability (HRV) an index of physiological calming, maintained by the parasympathetic pathway involved in self-regulation. Infants who regularly co-slept with their mothers had the highest IBI, indicating greater physiological calming and self-regulation across all sleeping arrangement conditions (CS, BAL, SS), followed by infants who regularly slept in the BAL sleeping arrangement from their mothers. IBI was lowest amongst regular solitary sleepers, potentially indicating physiological stress due to mother-infant separation. However, HRV indices during the sleeping arrangements (especially across regular solitary sleepers) were inconclusive as to whether the lack of change in HRV across all sleeping conditions was due to physiological stress responses or greater physiological regulation. This study is the first to investigate the effect of manipulated and habitual mother-infant sleeping arrangements on infant physiological calming.     

Living in a Digital Culture

Today our lives are filled with technology through which we communicate, work, play, and even engage with for making meaning. This implies the pervasive presence of digital media as an integral part of our everyday life. Although studies on media are mostly done by sociology and communication students, living in a digital age has significant implications for theological reflections. Despite this being the case, there is a gap in terms of a religious response to technology. In response to this, the aim of this article is to stimulate theological reflections with regard to living in a digital culture. This is achieved by raising theological questions in the hope that theology could take a proactive role in these discussions. The implications of living in a digital culture are quite vast; therefore, the focus will be limited to how a community is formed and sustained, and the possible implications for the church as community.     

Performance Benefits of Spatially Distributed Versus Stacked Information on Integration Tasks

Understanding the best way to present information has been an issue of interest to many researchers. Regardless of the content of the information, purely physical elements such as spatial organization may also influence performance. Across two studies with 111 undergraduates (78 in Study 1 and 33 in Study 2), we compared spatially distributed (i.e. when information sources are presented side‐by‐side) against stacked displays (i.e. when information sources are sitting on top of one another with only the top source fully visible). A distributed display time advantage was consistently observed. As potential explanations, a memory strategy selection hypothesis was examined along with other procedural alternative explanations. Copyright © 2011 John Wiley & Sons, Ltd.     

L’instrumentalisation managériale des espaces de délibération formels: l’expérience des enseignantes du préscolaire/primaire

This study examines formal deliberation spaces’ structure and how they translate into collegial work structures. Based on a critical experientialist work theory and a materialist feminist perspective it considers formal deliberation spaces and teachers’ lived experiences. The methodology relies on a qualitative research design involving 25 primary school teachers and individual and group interviews. The results show many mandatory formal deliberation spaces within the work organization and highlight the limited possibilities for teachers to deliberate their day-to-day experiences within these spaces. The findings render visible the process by which the structure of formal deliberation spaces can be moulded and instrumentalized to benefit the administration and render invisible teachers’ lived experience, leading to institutional silencing.     

Coping with COVID-19: The sociomaterial dimensions of living with pre-existing mental illness during the early stages of the coronavirus crisis

In this article, we use the case study method to detail the experiences of five participants who reported living with pre-existing mental illness during COVID-19. We adopted a sociomaterial analytical approach, seeking to identify how human and nonhuman agents came together to generate states of wellbeing or distress during this challenging period. As the case studies show, feelings of anxiety, fear and risk were generated from the following sociomaterial conditions: loss of face-to-face contact with friends and family members; concerns about hygiene and infecting others; financial stress; loss of regular paid employment or volunteering work; public spaces; and the behaviour of unknown others in public spaces. The agents and practices that emerged as most important for opening capacities for coping and maintaining wellness during lockdown included: the space of the home; contact with a small number of intimate others; online therapeutic care; practising self-care skills learnt from previous difficult times; helping and supporting others; engaging in leisure activities; and the companionship of pets. Contributing to an affirmative approach to more-than-human assemblages of health, distress and recovery, these findings demonstrate what bodies can do in times of crisis and the agents and practices that can generate capacities for coping.