Whether man is predisposed to lethal violence, ranging from homicide to warfare, and how that may have impacted human evolution, are among the most controversial topics of debate on human evolution. Although recent studies on the evolution of warfare have been based on various archaeological and ethnographic data, they have reported mixed results: it is unclear whether or not warfare among prehistoric hunter – gatherers was common enough to be a component of human nature and a selective pressure for the (...) evolution of human behaviour. This paper reports the mortality attributable to violence, and the spatio-temporal pattern of violence thus shown among ancient hunter–gatherers using skeletal evidence in prehistoric Japan (the Jomon period: 13000 cal BC–800 cal BC). Our results suggest that the mortality due to violence was low and spatio-temporally highly restricted in the Jomon period, which implies that violence including warfare in prehistoric Japan was not common. (shrink)

A nonlinear two-variable reaction-diffusion model of bone mineral metabolism, built from an overall self-oscillatory compartmental model of calcium metabolism in vivo, has been studied for its ability to generate spatial and spatio-temporal self-organizations in a two-dimensional space. Analytical and numerical results confirm the theoretical properties previously described for this kind of model. In particular, it is shown that, for a given set of reactional parameter values and certain values of the ratio of the two diffusion coefficients, there exists a set (...) of unstable wavenumbers leading spontaneously to the development, from the homogeneous steady state, of either different types of stationary spatial patterns (hexagonal, striped and re-entrant hexagonal patterns) or more or less complex spatio-temporal expressions. We discuss the relevance of analogies established between some spatial or spatio-temporal structures predicted by the model and some peculiar features of the primary bone trabecular architecture which appear during embryonic ossification. (shrink)

We adapted the Bubbles procedure [Vis. Res. 41 (2001) 2261] to examine the effective use of information during the first 282 ms of face identification. Ten participants each viewed a total of 5100 faces sub-sampled in space–time. We obtained a clear pattern of effective use of information: the eye on the left side of the image became diagnostic between 47 and 94 ms after the onset of the stimulus; after 94 ms, both eyes were used effectively. This preference for (...) the eyes increased with practice, and was not solely due to the informativeness of the eyes for the task at hand. The bias for the eye on the left side of the image is explained in terms of hemispheric specialization. Although there were individual differences, most participants exhibited this pattern of effective use of information. An intriguing finding is that most participants displayed a clear sinusoidal modulation of effective use of attention through time with a frequency of about 10.6 Hz. (shrink)

Aggregation is one of the most widespread phenomena in animal groups and often represents a collective dynamic response to environmental conditions. In social species the underlying mechanisms mostly obey self-organized principles. This phenomenon constitutes a powerful model to decouple purely social components from ecological factors. Here we used a model of cockroach aggregation to address the problems of sensitivity of collective patterns and control of aggregation dynamics. The individual behavioural rules and the emergent collective patterns were previously quantified and modelled (...) by Jeanson et al.. We first present the diverse spatio-temporal patterns of a derived model in response to parameter changes, either involving social or non-social interactions. This sensitivity analysis is then extended to evaluate the evolution of these patterns in mixed societies of sub-populations with different behavioural parameters. Simple linear or highly non-linear collective responses emerge. We discuss their potential application to control animal populations by infiltration of biomimetic autonomous robots that mimic cockroach behaviour. We suggest that detailed behavioural models are a prerequisite to do so. (shrink)

We propose a model mechanism for the initiation and spatial positioning of teeth primordia in the alligator, Alligator mississippiensis. Detailed embryological studies by Westergaard and Ferguson have shown that jaw growth plays a crucial role in the developmental patterning of the tooth initiation process. Based on biological data we develop a dynamic patterning mechanism, which crucially includes domain growth. The mechanism can reproduce the spatial pattern development of the first seven teeth primordia in each half jaw of A. mississippiensis. (...) The results for the precise spatio-temporal sequence compare well with experiment. Simulation of the model also predicts that certain transplantations can alter the spatial sequence of teeth primordia initiation. (shrink)

BackgroundAlthough gait patterns disturbances are known to be related to cognitive decline, there is no consensus on the possibility of predicting one from the other. It is necessary to find the optimal gait features, experimental protocols, and computational algorithms to achieve this purpose.PurposesTo assess the efficacy of the Stable Sparse Classifiers procedure for discriminating young and healthy older adults, as well as healthy and cognitively impaired elderly groups from their gait patterns. To identify the walking tasks or combinations of tasks (...) and specific spatio-temporal gait features that allow the best prediction with SSC.MethodsA sample of 125 participants was studied. They underwent assessment with five neuropsychological tests that explore different cognitive domains. A summarized cognitive index, based on the Mahalanobis distance from normative data, was calculated. The sample was divided into three groups using k-means clustering of MDCog in addition to Age. The participants executed four walking tasks and their gait patterns, measured with a body-fixed Inertial Measurement Unit, were used to calculate 16 STGF and dual-task costs. SSC was then employed to predict which group the participants belonged to. The classification's performance was assessed using the area under the receiver operating curves and the stable biomarkers were identified.ResultsThe discrimination HE vs. MCI-E revealed that the combination of the easy dual-task and the fast walking task had the best prediction performance. The features related to gait variability and to the amplitude of vertical acceleration had the largest predictive power. SSC prediction accuracy was better than the accuracies obtained with linear discriminant analysis and support vector machine classifiers.ConclusionsThe study corroborated that the changes in gait patterns can be used to discriminate between young and healthy older adults and more importantly between healthy and cognitively impaired adults. A subset of gait tasks and STGF optimal for achieving this goal with SSC were identified, with the latter method superior to other classification techniques. (shrink)

Based on the theoretical analysis of self-consciousness concepts, we hypothesized that the spatio-temporal pattern of functional connectivity within the default-mode network (DMN) should persist unchanged across a variety of different cognitive tasks or acts, thus being task-unrelated. This supposition is in contrast with current understanding that DMN activated when the subjects are resting and deactivated during any attention-demanding cognitive tasks. To test our proposal, we used, in retrospect, the results from our two early studies ([Fingelkurts, 1998] and [Fingelkurts et (...) al., 2003]). In both studies for the majority of experimental trails we indeed found a constellation of operationally synchronized cortical areas (indexed as DMN) that was persistent across all studied experimental conditions in all subjects. Furthermore, we found three major elements comprising this DMN: two symmetrical occipito-parieto-temporal and one frontal spatio-temporal patterns. This new data directly supports the notion that DMN has a specific functional connotation – it provides neurophysiologic basis for self-processing operations, namely first-person perspective taking and an experience of agency. (shrink)

BackgroundGait Analysis of healthy people, imitating pathological conditions while walking, has increased our understanding of biomechanical factors. The influence of the pelvis as a biomechanical constraint during gait is not specifically studied. How could mimicking a pelvic attitude influence the dynamic mechanical interaction of the body segments? We proposed an investigation of the pelvic attitude role on the gait pattern of typically developed people when they mimicked pelvic anteversion and posteroversion.Materials and methodsSeventeen healthy volunteers were enrolled in this study. (...) They simulated a pelvic anteversion and posteroversion during walking, exaggerating these postures as much as possible. 3D gait analysis was conducted using an optoelectronic system with eight cameras and two force plates. The kinematic, kinetic, and spatio-temporal parameters were compared between the three walking conditions.ResultsIn Pelvic Anteversion gait we found: increased hip flexion, increased knee flexion during stance, and reduction of ankle flexion-extension Range of Motion compared with Pelvic Normal gait. In Pelvic Posteroversion gait compared with PN, we found: decreased hip flexion-extension RoM with a tendency to hip extension, decreased knee maximum extension in stance, and increased ankle maximum dorsiflexion in stance.ConclusionThe configuration of PA contains gait similarities and differences when compared with pathologic gait where there is an anteversion as seen in children with Cerebral Palsy or Duchenne Muscular Dystrophy. Similarly, attitudes of PP have been described in patients with Charcot-Marie-Tooth Syndrome or patients who have undergone Pelvic Osteotomy. Understanding the dynamic biomechanical constraints is essential to the assessment of pathological behavior. The central nervous system adapts motor behavior in interaction with body constraints and available resources. (shrink)

In this paper we develop a new mathematical approach to the pattern formation problem in biology. This problem was first posed mathematically by A.M. Turing, however some principal questions were left open . Here we consider the pattern formation ability of some class of genetic circuits. First, we show that the genetic circuits are capable of generating arbitrary spatio-temporal patterns. Second, we give upper and lower bounds on the number of genes in a circuit generating a given (...) class='Hi'>pattern. A connection between the complexity of gene interaction and the pattern complexity is found. We investigate the stochastic stability of patterning algorithms. Results are consistent with experimental data. (shrink)

Concepts of space and time are widely developed in physics. However, there is a considerable lack of biologically plausible theoretical frameworks that can demonstrate how space and time dimensions are implemented in the activity of the most complex life-system – the brain with a mind. Brain activity is organized both temporally and spatially, thus representing space-time in the brain. Critical analysis of recent research on the space-time organization of the brain’s activity pointed to the existence of so-called operational space-time in (...) the brain. This space-time is limited to the execution of brain operations of differing complexity. During each such brain operation a particular short-term spatio-temporal pattern of integrated activity of different brain areas emerges within related operational space-time. At the same time, to have a fully functional human brain one needs to have a subjective mental experience. Current research on the subjective mental experience offers detailed analysis of space-time organization of the mind. According to this research, subjective mental experience (subjective virtual world) has definitive spatial and temporal properties similar to many physical phenomena. Based on systematic review of the propositions and tenets of brain and mind space-time descriptions, our aim in this review essay is to explore the relations between the two. To be precise, we would like to discuss the hypothesis that via the brain operational space-time the mind subjective space-time is connected to otherwise distant physical space-time reality. (shrink)

This paper briefly review a current trend in neuroscience aiming to combine neurophysiological and physical concepts in order to understand the emergence of spatio-temporal patterns within brain activity by which brain constructs knowledge from multiple streams of information. The authors further suggest that the meanings, which subjectively are experienced as thoughts or perceptions can best be described objectively as created and carried by large fields of neural activity within the operational architectonics of brain functioning.

A theory of true observation is developed as a generalization of the method of inter-observer agreement that scientists use to determine the objectivity and reliability of observations. A true observation is defined as a statement included in a set of statements in which there is statistical dependence and perfect agreement between the statements made by a universe of experimentally independent persons. Meaningfulness--the existence of an objective referent--for each form of statement included in the set is inferred from statistical dependence, correct (...) meaning within the universe of observers from the absence of disagreement. In this theory truth is inferred from a spatio-temporal pattern of statements as behavior rather than from the traditional correspondence between observation and object or logical relationships among statements. (shrink)

The survival and development of consciousness in biological evolution call for an explanation. An interactionistic mind-brain theory seems to have the greatest explanatory value in this context. An interpretation of an interactionistic hypothesis, recently proposed by Karl Popper, is discussed both theoretically and based on recent experimental data. In the interpretation, the distinction between the conscious mind and the brain is seen as a division into what is subjective and what is objective, and not as an ontological distinction between something (...) immaterial and something material. The interactionistic hypothesis is based on similarities between minds and physical forces. The conscious mind is understood to interact with randomly spontaneous spatio-temporal patterns of action potentials through an electromagnetic field. Consequences and suggestions for future studies are discussed. (shrink)

Naturalistic stimuli, including movie, music, and speech, have been increasingly applied in the research of neuroimaging. Relative to a resting-state or single-task state, naturalistic stimuli can evoke more intense brain activities and have been proved to possess higher test–retest reliability, suggesting greater potential to study adaptive human brain function. In the current research, naturalistic functional magnetic resonance imaging (N-fMRI) has been a powerful tool to record brain states under naturalistic stimuli, and many efforts have been devoted to study the high-level (...) semantic features from spatial or temporal representations via N-fMRI. However, integrating both spatial and temporal characteristics of brain activities for better interpreting the patterns under naturalistic stimuli is still underexplored. In this work, a novel hybrid learning framework that comprehensively investigates both the spatial (via Predictive Model) and the temporal [via convolutional neural network (CNN) model] characteristics of the brain is proposed. Specifically, to focus on certain relevant regions from the whole brain, regions of significance (ROS), which contain common spatial activation characteristics across individuals, are selected via the Predictive Model. Further, voxels of significance (VOS), whose signals contain significant temporal characteristics under naturalistic stimuli, are interpreted via one-dimensional CNN (1D-CNN) model. In this article, our proposed framework is applied onto the N-fMRI data during naturalistic classical/pop/speech audios stimuli. The promising performance is achieved via the Predictive Model to differentiate the different audio categories. Especially for distinguishing the classic and speech audios, the accuracy of classification is up to 92%. Moreover, spatial ROS and VOS are effectively obtained. Besides, temporal characteristics of the high-level semantic features are investigated on the frequency domain via convolution kernels of 1D-CNN model, and we effectively bridge the “semantic gap” between high-level semantic features of N-fMRI and low-level acoustic features of naturalistic audios in the frequency domain. Our results provide novel insights on characterizing spatiotemporal patterns of brain activities via N-fMRI and effectively explore the high-level semantic features under naturalistic stimuli, which will further benefit the understanding of the brain working mechanism and the advance of naturalistic stimuli clinical application. (shrink)

Opinions are rarely binary; they can be held with different degrees of conviction, and this expanded attitude spectrum can affect the influence one opinion has on others. Our goal is to understand how different aspects of influence lead to recognizable spatio-temporal patterns of opinions and their strengths. To do this, we introduce a stochastic spatial agent-based model of opinion dynamics that includes a spectrum of opinion strengths and various possible rules for how the opinion strength of one individual affects the (...) influence that this individual has on others. Through simulations, we find that even a small amount of amplification of opinion strength through interaction with like-minded neighbors can tip the scales in favor of polarization and deadlock. (shrink)

Spatio-temporal neuro-dynamics is a quickly developing field of brain research and Tsuda's work is a significant contribution toward establishing theoretical foundations in this area. It is conceivable that the fragmented attractor landscapes and dynamical memory patterns identified earlier in various K-sets are biologically plausible manifestations of attractor ruins, chaotic itinerancy, and Cantor encoding as applied to sensory information processing.

Statistical regularities of the environment are important for learning, memory, intelligence, inductive inference, and in fact, for any area of cognitive science where an information-processing brain promotes survival by exploiting them. This has been recognised by many of those interested in cognitive function, starting with Helmholtz, Mach, and Pearson, and continuing through Craik, Tolman, Attneave, and Brunswik. In the current era, many of us have begun to show how neural mechanisms exploit the regular statistical properties of natural images. Shepard proposed (...) that the apparent trajectory of an object when seen successively at two positions results from internalising the rules of kinematic geometry, and although kinematic geometry is not statistical in nature, this is clearly a related idea. Here it is argued that Shepard's term, “internalisation,” is insufficient because it is also necessary to derive an advantage from the process. Having mechanisms selectively sensitive to the spatio-temporal patterns of excitation commonly experienced when viewing moving objects would facilitate the detection, interpolation, and extrapolation of such motions, and might explain the twisting motions that are experienced. Although Shepard's explanation in terms of Chasles' rule seems doubtful, his theory and experiments illustrate that local twisting motions are needed for the analysis of moving objects and provoke thoughts about how they might be detected. Key Words: Chasles' rule; evolution; geometry; perception; redundancy; statistics; twisting. (shrink)

The principles of automation (automatism and programming) in the unfolding of spatio-temporal patterns during animal development are deduced from experimental data reconsidered from the point of view of cell sociology. The developmental programme in the egg is not part of the genetic information but a part of the cytoplasmic information. Throughout development cells store extra-cellular information released by their neighbours in the form of cytoplasmic information. Successive determinations cannot be considered as successive reprogrammings of cells: each one consists of a (...) selection of one specific programme from the total information previously stored. This programme specifies cell interactions in the determined population as a whole; it is very imprecise and is progressively completed during the course of further differentiation by information released by neighbouring cell populations. Complicated patterns may emerge from only two homogeneous populations involved in distinct differentiation pathways and confronting each other. Consequently the egg developmental programme provides gene effectors and specific physico-chemical conditions necessary for the starting of at least two distinct differentation pathways. Experimental data suggest that there are two components in this programme. One is a molecular machinery which starts at fertilization in the whole cytoplasm. It yields two programmes of differentiation, typically first an endodermal and then an ectodermal one. The other component of the egg developmental programme, which does not require specific information, allows the interception of the first (endodermal) programme. The application of informatics to developmental automatism is discussed in the latter part of the paper. (shrink)

We explore the understanding of conscious states in terms of spatio-temporal dynamics through modelling a mobile agent. Conscious states are associated with an agent's spontaneous and deterministic fluctuation between attachment to and detachment from the surroundings. It is because of this fluctuating nature, we argue, that an agent can perceive structure in the world. Perception requires a conscious state in physical devices. This is a central concern of this paper, and we examine it by simulating a mobile agent equipped with (...) an interconnected Fitz-Hugh-Nagumo (FHN) neuron network with delayed signal transmissions. The agent can move around a space by sensing the environment pattern through the input neurons and computing the motor outputs via the FHN network. The agent shows a variety of motion styles and a spontaneous selection of motion styles responding to the surroundings. Such a phenomenon is named embodied chaotic itinerancy (ECI), as an extension of chaotic itinerant dynamics, which is known to be a typical dynamic with a high degree of freedom. We take this selective mode of response to be significant, particularly those interacting with spatial pattern, as an inevitable property of conscious states. (shrink)

An aim of science is to increase our understanding of the natural world. A primary means for doing so is by providing explanations, which often proceed by tracing the causes of phenomena. How can a causal explanation lead to understanding? While explanations can take many forms, I argue that to succeed they must embody a conception of causation shared with their audience. The challenge then, is to describe this conception and detail its role in explanation. While there is good evidence (...) that scientists employ more than one causal concept, I argue that the concept of productive causation (centered on the notion of bringing about change via a connection) has a primary role in natural science explanations. After critiquing other philosophical accounts, I develop a new theory of productive causation and show how it provides an underpinning for successful explanations. The heart of the theory is a network of persisting processes that possess dispositions toward change-producing mutual interactions. I argue that in a good explanation, the scientific entities, properties and activities invoked will correspond to the theory’s depiction of causal structure. One important dimension of the theory describes how repeated patterns of interaction can give rise to a hierarchy of composite processes. This allows the theory to account for stabilized entities at various spatio-temporal scales. In turn, this enables the approach to be applicable throughout the natural sciences. After starting with simple examples, I show how the theory deals with more challenging cases from physics to biology. I conclude that the approach illuminates how explanations of various forms across diverse disciplines can lead to scientific understanding. (shrink)

This article discusses an approach to characterizing movement patterns (paths/trajectories) of individual agents that allows for relating aspects of cognitive conceptualization of movement patterns with formal spatial characterizations. To this end, we adopt a perspective of characterizing movement patterns on the basis of perceptual and conceptual invariants that we term movement choremes (MCs). MCs are formally grounded by behaviorally validating qualitative spatio-temporal calculi. Relating perceptual and cognitive aspects of space and formal theories of spatial information has shown promise to foster (...) understanding of the semantics of movement patterns. Specifically, we discuss our approach in relation to existing qualitative formalisms such as the region connection calculus and the Egenhofer’s intersection formalisms. We show that the MC approach is compatible with these approaches but offers additional opportunities to improve the cognitive adequacy of these formalisms. We summarize this paper using a movement taxonomy that also provides guidance for future research. (shrink)

The generation of patterns and the diversity of cell types in a multicellular organism require differential gene regulation. At the heart of this process are enhancers or cis‐regulatory modules (CRMs), genomic regions that are bound by transcription factors (TFs) that control spatio‐temporal gene expression in developmental networks. To date, only a few CRMs have been studied in detail and the underlying cis‐regulatory code is not well understood. Here, we review recent progress on the genome‐wide identification of CRMs with chromatin (...) immunoprecipitation of TF‐DNA complexes followed by microarrays (ChIP‐on‐chip). We focus on two computational approaches that have succeeded in predicting the expression pattern driven by a CRM either based on TF binding site preferences and their expression levels, or quantitative analysis of CRM occupancy by key TFs. We also discuss the current limits of these methods and highlight some of the key problems that have to be solved to gain a more complete understanding of the structure and function of CRMs. (shrink)

Single cell receptive field dynamics characterized by highly complicated spatio-temporal activity distributions observable during sensory information processing transforms into much simpler spatio-temporal activity pattern at a population level, indicating a qualitative transformational step of time-variant processing from microscopic to mesoscopic levels. As these dynamics are subject to significant modifications during learning, dynamic information processing is in a permanent state of use-dependent fluctuations.

This paper examines an intersection between ecological psychology and the enactive approach, brought about by studying sense-making in relation to a behavior setting in Hong Kong and adopting a focus on embodied action and gesture. A cosmetics pop-up store in a downtown shopping mall provides the basis for a case study involving a two pronged analysis. I first use Barker’s behavior setting theory to describe the publically accessible structure and dynamics of the store, which reveals a bounded spatio-temporal structure with (...) several interdependent behavior-milieu parts. I then analyze video recordings of my research participant encountering, entering, and exploring this environment. Following an enactive-informed micro-ethnographic approach to embodied communication, I examine her movements, postures, gestures, and language use as she joins the behavior setting. These fine-grained descriptions of her embodied actions provide an empirical basis to analyze enactive sense-making. On the one hand, they disclose the affective and emotional experience of perceiving relevant affordances in the environment, and on the other hand, they show the specificity of sensorimotor abilities required to join the setting’s standing pattern of behavior. (shrink)

This paper reviews a theory on the physiological conditions of consciousness. The theory consists of four hypotheses: (1) The occurrence of states of consciousness depends on the formation of higher-order representations that represent the internal state of the brain itself. (2) Higher-order representations are instantiated by the spatio-temporal activity pattern of large-scale neuronal assemblies. (3) The N-methyl-D-aspartate (NMDA) synapse plays a crucial role in the generation of conscious states by implementing the binding mechanism that the brain uses to produce (...) large-scale assemblies. (4) The activation state of the NMDA receptor determines the rate at which representational structures can be built up. Unconsciousness or altered states of consciousness occur if, and only if, NMDA-dependent binding processes are inhibited. (shrink)

This paper argues that concepts of legality in legal theory can be profitably understood as being underwritten by modes of spatio-temporal objectification. In the first part of the paper, a scheme of such modes is provided, and a map of jurisprudential inquiries is thereby offered. In the second part of the paper, two concepts of legality - underwritten by two different modes of spatio-temporal objectification - are analysed. The analysis shows how both concepts of legality lead to different sets of (...) prescriptive resources as to the evaluation and design of legal systems. Finally, it is argued that the response of legal theory to practical challenges within the public sphere cannot afford to be based on any one concept of legality. Rather, we need to be pluralists about concepts of legality, recognising the limitations of any one such concept - represented, in this paper, by way of spatio-temporal objectification that underwrites those concepts. A crisis in legal theory cannot be claimed on the basis of any alleged lack of correspondence between any one concept of legality and reality. On the contrary, a crisis will ensue to the extent that legal theory becomes dominated by theoretical imperialism, namely, by the belief that any one concept of legality is capable of capturing the world as it is, and, therefore, also capable of standing as a foundation for a prescriptive agenda. The vice of theoretical imperialism induces anxiety over the identity of a discipline, and leads to a quelling of the very theoretical diversity that is required for an ethical response to the specific complexity of the public sphere. (shrink)

A lot of people believe that distinct objects can occupy precisely the same place for the entire time during which they exist. Such people have to provide an answer to the 'grounding problem' – they have to explain how such things, alike in so many ways, nonetheless manage to fall under different sortals, or have different modal properties. I argue in detail that they cannot say that there is anything in virtue of which spatio-temporally coincident things have those properties. However, (...) I also argue that this may not be as bad as it looks, and that there is a way to make sense of the claim that such properties are primitive. (shrink)

Human articulated motion can be readily recognized robustly even from impoverished so-called point-light displays. Such sequence information is processed by separate visual processing channels recruiting different stages at low and intermediate levels of the cortical visual processing hierarchy. The different contributions that motion and form information make to form articulated, or biological, motion perception are still under investigation. Here we investigate experimentally whether and how specific spatio-temporal features, such as extrema in the motion energy or maximum limb expansion, indicated by (...) the lateral and longitudinal extension, constrain the formation of the representations of articulated body motion. In order to isolate the relevant stimulus properties we suggest a novel masking technique, which allows to selectively impair the ankle information of the body configuration while keeping the motion of the point-light locations intact. Our results provide evidence that maxima in feature channel representations, e.g., the lateral or longitudinal extension, define elemental features to specify key poses of biological motion patterns. These findings provide support for models which aim at automatically building visual representations for the cortical processing of articulated motion by identifying temporally localized events in a continuous input stream. (shrink)

Freeman's pioneering work -- and neurodynamics in general -- has largely ignored specification of an anatomical framework within which features of coherent objects are represented, associated, deleted, and manipulated in computations. Recent theoretical work suggests such a framework can emerge during embryogenesis by selection of neuron ensembles and synaptic connections that maximize the magnitude of synchrony while approaching ultra-small-world connectivity. The emergent structures correspond to those of both columnar and non-columnar cortex. With initial connections thus organized, spatio-temporal information in sensory (...) inputs can generate systematic and specific patterns of synchronous oscillation, with consequent synaptic storage. The theoretical assemblies of connections resemble experimentally observed 'lego sets', while facilitation and interference among synchronous patterns, particularly when executed by fast synapses under metabolic entanglement, imply powerful parallel computation. (shrink)

In this paper we consider a claim that in the natural world there is no fact of the matter about the spatio-temporal separation of events. In order to make sense of such a notion and construct useful models of the world, it is proposed to use elements of a non-classical logic. Specifically, we focus here on causality, as a concept tightly related with the assumption of there being distinct, separate events, proposing a model according to which it can be considered (...) to be spatio-temporally graded. It is outlined how this can be described using the formalism of fuzzy sets theory, with the degree of causality varying between 1, that is no separation between causes and effects, and 0, that is perfect separation between causes and their effects as in classical ’billiard balls’ models of physical systems, namely such based on the notion of ideal mathematical point. Our model posits that subjective moments of time are like fuzzy sets, with their extension determined by local degrees of causality, resulting from information integration processes extended gradually in space and time. This, we argue, is how a notion of causality could be, to a certain degree, spared and reconciled with a variant of Bergsonian duration theory as formulated in the theory of continuous change. Relation of the proposed viewpoint to other theories, as well as possible solutions it suggests to various problems, in particular the measurement problem, are also discussed. (shrink)

This paper argues that concepts of legality in legal theory can be profitably understood as being underwritten by modes of spatio-temporal objectification. In the first part of the paper, a scheme of such modes is provided, and a map of jurisprudential inquiries is thereby offered. In the second part of the paper, two concepts of legality – underwritten by two different modes of spatio-temporal objectification – are analysed. The analysis shows how both concepts of legality lead to different sets of (...) prescriptive resources as to the evaluation and design of legal systems. Finally, it is argued that the response of legal theory to practical challenges within the public sphere cannot afford to be based on any one concept of legality. Rather, we need to be pluralists about concepts of legality, recognising the limitations of any one such concept – represented, in this paper, by way of spatio-temporal objectification that underwrites those concepts. A crisis in legal theory can- not be claimed on the basis of any alleged lack of correspondence between any one concept of legality and reality. On the contrary, a crisis will ensue to the extent that legal theory becomes dominated by theoretical imperial- ism, namely, by the belief that any one concept of legality is capable of capturing the world as it is, and, therefore, also capable of standing as a foundation for a prescriptive agenda. The vice of theoretical imperialism in- duces anxiety over the identity of a discipline, and leads to a quelling of the very theoretical diversity that is required for an ethical response to the spe- cific complexity of the public sphere.Resumen:En este artículo se sostiene que los conceptos de legalidad, dentro de la teoría del derecho, pueden entenderse con mayor provecho si se piensa que están determinados por modos de objetivación espacio-temporal. En la primera parte se presenta un esquema de tales modos y, de esa manera, se ofrece un mapa de las investigaciones iusfilosóficas. En la segunda parte, se analizan dos conceptos de legalidad —determinados por dos modos diferentes de objetivación espacio-temporal—. El análisis muestra cómo ambos conceptos de legalidad conducen a diferentes conjuntos de fuentes prescriptivas para la evaluación y el diseño de los sistemas jurídicos. Finalmente, se sostiene que la respuesta de la teoría del derecho a los problemas prácticos del ámbito público no puede basarse en un solo concepto de legalidad. Por el contrario, es necesario ser pluralistas sobre los conceptos de legalidad y reconocer las limitaciones de cada uno de ellos —representados, en este ensayo, por la objetivación espacio-temporal que los suscribe—. No se puede asegurar que la teoría del derecho esté en crisis sobre la base de una presunta falta de correspondencia entre algún concepto de legalidad y la realidad. Por el contrario, aquella se generará en la medida en que la teoría del derecho llegue a estar dominada por un imperialismo teórico, a saber, por la creencia de que cualquier concepto de legalidad es capaz de capturar el mundo tal como es, y, por lo tanto, que es capaz de erigirse como fundamento para una agenda prescriptiva. El vicio de un imperialismo teórico induce una inquietud sobre la identidad de una disciplina, y conduce a sofocar la diversidad teórica que se requiere para dar una respuesta ética a la complejidad concreta del ámbito público. (shrink)

Systems theory is proposed as a major resource for reconceptualizing a Christian theology of creation. Section I outlines the principles of the theory of autopoietic systems and discusses in particular Manfred Eigen's and Stuart Kauffman's differing views of the emergence of life. Section II shows how biblical texts conceive of God's “blessing” as a divine installment and reshaping of spatio‐temporal fields for creaturely self‐productivity. On this double basis, Section III undertakes a constructive attempt to formulate a theology of self‐productivity (...) within a Trinitarian framework. The unity of divine self‐consistency and capacity for self‐relativization is seen as the clue for understanding how God not only sustains the world in general but also influences particular processes by changing the overall probability pattern of evolving systems. (shrink)

The tidal-wave theory is inspired by the particular morphology of the cerebellar cortex. It elegantly attributes function to the anisotropy of the cerebellar wiring and the geometry of Purkinje cell dendrites. In this commentary, physiological considerations are used to elaborate temporal and spatial constraints of the tidal-wave theory. It is shown, first, that limitations of temporal precision in the cortical inputs to the mammalian cerebellum delimit the spatial resolution of an input sequence (i.e., the minimal distance along the parallel fibers (...) which can detect sequential input) to the range of a millimeter at best. Second, temporal characteristics of Purkinje cell postsynaptic potentials are argued to predict a distance of at least several millimeters along the parallel fiber beam in order to generate a sequence in the cerebellar output. It is concluded that the implementation of tidal waves as a general principle of cerebellar function is questionable as there exist cerebelli too small to match these constraints. (shrink)

This is an attempt to work the ground in the philosophy of nature by trying to articulate in a clear and rigorous philosophical sense what Nature is. This will involve pressing the question of nature to the point of essential distinctions in the hope of disclosing conditions that mark Nature as a distinct conception and general mode of being. Drawing and building upon Peirce’s account of “facts,” time and space, and the “dissymmetry” of nature, I will suggest some ways in (...) which the essential distinctness of Nature can be framed. I will end by offering a parting glance at some of the implications that might follow from the distinctions constructed. (shrink)

This article queries the notion of performance as a sustained act of commemoration, and, thus, implicitly, atonement and forgetting. Laying aside potential considerations of guilt and/or victimisation inherent in the spatio-temporal superimposition of a World War II modality of existence on an affluent, and, by comparison, peaceful part of the world, my investigation focuses on three mutually related areas of performance: the body’s hidden somaticity, the co-becoming of the self and time; and walking as a mnemonic mechanism. Aided by the (...) Japanese philosophers’ Shigenori Nagatomo’s concept of the hidden body and Kitaro Nishida’s theorisation of the relationship between the temporalised and the atemporal, the actual and the virtual, the spatial and the non-spatial as the continuity of discontinuity, I argue against the idea of performance as a cumulative, sedimentary and implicitly restorative poiesispraxis. Instead, I seek to articulate the ways in which the actional, interoceptive and psychogeographic schemes generated by eating and walking intertwine to create complex patterns of individual-collective remembering-forgetting. (shrink)

There are two main formulations of a key causal principle in the Cartesian a priori philosophical system: one, present in Meditation III, says that the cause of the representational content of an idea must be situated at the same or higher level in ontology than the level at which the object represented is situated, the other, present in the axioms section of the Second Replies, says that the cause must contain the same property as is represented by the idea. This (...) central chapter defends four main contentions. The same‐property formulation is basic in Descartes's system. The notion of causality in the basic causal principle does not represent a spatio temporally extended natural process but a form of intentional explanation. When point is combined with the interpretation of the rule of truth offered in Ch. 2, the rule of truth and the basic causal principle prove to be equivalent. Finally, in light of, there is one main pattern of inference in Cartesian epistemology taking the rule of truth/causal principle as its major premise and underlying all of Descartes arguments from my ideas to the existence of things outside my ideas, including the proof of my own existence, the proof of the existence of God in Meditations III and V and the proof of the existence of the external world in Meditation VI and the Principles of Philosophy II,1. (shrink)

This paper is a comparative study based on the linguistic evidence in Vedic Sanskrit and Homeric Greek, aimed at reconstructing the space-time cognitive models used in the Proto-Indo-European language in a diachronic perspective. While it has been widely recognized that ancient Indo-European languages construed earlier events as in front of later ones, as predicted in the Time-Reference-Point mapping, it is less clear how in the same languages the passage took place from this ‘archaic’ Time-RP model or non-deictic sequence, in which (...) future events are behind or follow the past ones in a temporal sequence, to the more recent ‘post-archaic’ Ego-RP model that is found only from the classical period onwards, in which the future is located in front and the past in back of a deictic observer. Data from the Rigveda and the Homeric poems show that an Ego-RP mapping with an ego-perspective frame of reference could not have existed yet at an early Indo-European stage. In particular, spatial terms of front and behind turn out to be used with reference not only to temporal events, but also to east and west respectively, thus presupposing the existence of an absolute field-based FoR which the temporal sequence is metaphorically related to. Specifically, sequence is relative position on a path appears to be motivated by what has been called day orientation frame, in which the different positions of the sun during the day motivate the mapping of front onto ‘earlier’ and behind onto ‘later’, without involving ego’s ‘now’. These findings suggest that early Indo-European still had not made use of spatio-temporal deixis based on the tense-related ego-perspective FoR found in modern languages. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:THE SPATIO-TEMPORAL THEORY OF INDIVIDUATION MICHAEL POTTS Methodist Callege Fayetteville, North Carolina I. HISTORICAL OVERVIEW A. The Influence of Plato HE SPATIO-TEMPORAL theory of individuation has long history in the philosophical tradition. Its roots go ack to Aristotle's theory of individuation by matter,1 and ultimately back to Plato. In the Timaeus, Plato struggled with the problem of how forms are instantiated in the phenomenal world. Besides " a model (...) form (paradeigmatos eidos), intelligible and ever uniformly existent" and "the model's copy (mimeta paradeigmatos), subject to becoming and visible," Plato postulated a third thing, a " receptacle " (hupodochen), "the nurse of all becoming." 2 It is wholly indeterminate:... while it is always receiving all things, nowhere and in no wise does it assume any shape similar to any of the things that enter into it. For it is laid down by nature as a moulding-stuff for everything, being moved and marked by the entering figures, and because of them it appears different at different times. And the figures that enter and depart are copies of those that are always existent, being stamped from them...8 1 I recognize that this is a controversial claim. Since I am tracing the spatio-temporal theory of individuation from Aristotle through St. Thomas Aquinas, for the purposes of this paper I will follow St. Thomas's interpretation of Aristotle and accept the view that Aristotle took matter to be the principle of individuation. 2 Plato, Timaeus 49a. The version used is the Loeb edition by R. G. Bury (Cambridge, Mass.: Harvard University Press, 1966). a Timaeus 50b-c. 59 60 MICHAEL POTTS The receptacle, then, is like formless wax upon which the forms are stamped. It is " apprehensible by a kind of bastard reasoning (logismo tini notho), barely an object of belief." 4 B. Aristotle It may seem on the surface unusual that the idea of the receptable would later be modified and used to explain individuation. Plato himself was concerned with the universal, the form. The instantiations of the forms in the phenomenal world do not even deserve to be called "this " or " that." 5 With Aristotle, however, the individual gains new importance, since for him forms have their reality only in individuals and individuals are primarily called "substance." If this is the case, then Aristotle has to explain how " humanity " can be the same while " Socrates" and " Callias" are two different individuals. Since form is universal, it cannot individuate, so the source of individuation must be matter-two individuals are different human beings, for example, because they have different lumps of matter.... and when the whole has been generated, such a form in this flesh and these bones, this is Callias or Socrates, and this is distinct from that which generated it because the matter is distinct (hulen, hetera gar), but it is the same in species since the species is indivisible.6 This view raises problems. Matter is indeterminate; it is Aristotle 's modification of Plato's receptacle. How can anything indeterminate itself determine individual substances? More needed to be done to.bring out the meaning of individuation by matter, and St. Thomas Aquinas developed a more detailed and satisfactory position. 4 Timaeus 52b. 5 Timaeus 49d-50a. 6 Aristotle, Metaphyscis 28 (1034a5-8). The Greek text used is Metaphysica, ed. by Werner Jaeger (Oxonii : E Typographaeo Clarendoniano, 1957). The English translation is by Hippocrates G. Apostle (Grinnell, Iowa: Peripatetic Press, 1979). THE SPATIO-TEMPORAL THEORY OF INDIVIDUATION 61 C. St. Thomas Aquinas Aquinas, recognizing that prime matter is indeterminate and therefore not something that can individuate, argues that the principle of individuation is " signate" or " designated" matter. "Materia signata" is defined as matter as " sub determinatis dimensionibus consideratur," " considered under determinate dimensions." 7 While the exact meaning of this is unclear, it seems to refer to matter under determinate spatial dimensions or coordinates. While the form determines what sort of thing an entity is, what determines it to be this individual is this matter with a particular set of spatial coordinates. Henry Veatch puts Aquinas's view into more modern terms: In fact, matter as determined by dimensive quantity guarantees ontologically nothing more nor less than the... (shrink)

Words are rarely produced in isolation. Yet, our understanding of multi-word production, and especially its time course, is still rather poor. In this research, we use event-related potentials to examine the production of multi-word noun phrases in the context of overt picture naming. We track the processing costs associated with the production of these noun phrases as compared with the production of bare nouns, from picture onset to articulation. Behavioral results revealed longer naming latencies for French noun phrases with determiners (...) and pre-nominal adjectives (D-A-N, the big cat ) than for noun phrases with a determiner (D-N, the cat ), or bare nouns (N, cat ). The spatio-temporal analysis of the ERPs revealed differences in the duration of stable global electrophysiological patterns as a function of utterance format in two time windows, from ~190 to 300 ms after picture onset, and from ~530 ms after picture onset to 100 ms before articulation. These findings can be accommodated in the following model. During grammatical encoding (here from ~190 to 300 ms), the noun and adjective lemmas are accessed in parallel, followed by the selection of the gender-agreeing determiner. Phonological encoding (after ~530 ms) operates sequentially. As a consequence, the phonological encoding process is longer for longer utterances. In addition, when determiners are repeated across trials, their phonological encoding can be anticipated or primed, resulting in a shortened encoding process. (shrink)

This volume explores Husserl's theory of sensibility and his conceptualization of spatial and temporal constitution. The author maps the linkages between Husserl's 'transcendental aesthetic', the theory of pure experience in empirio-criticism, as well as Immanuel Kant's transcendental philosophy. The core argument in this analysis centers on the relationship between spatiality and temporality in Husserl's philosophy. The study interrogates Husserl's understanding of the relationship between spatiality and temporality in terms of stratifications, analogies and parallelisms. It incorporates a discussion of the potentialities (...) and limitations of such an understanding. It concludes that such limits can be overcome by adopting an understanding of spatiality and temporality as interwoven moments of sensible experience-a 'spatio-temporal intertwining'. This 'intertwining' is made explicit in a thorough inquiry into three central topics in the phenomenological analysis of sensible experience: spatio-temporal individuation, perspectival givenness and bodily experience. The book shows how such an inquiry can form the bedrock of a dynamic and relational understanding of experience as a whole. (shrink)

Ongoing electroencephalography signals are recorded as a mixture of stimulus-elicited EEG, spontaneous EEG and noises, which poses a huge challenge to current data analyzing techniques, especially when different groups of participants are expected to have common or highly correlated brain activities and some individual dynamics. In this study, we proposed a data-driven shared and unshared feature extraction framework based on nonnegative and coupled tensor factorization, which aims to conduct group-level analysis for the EEG signals from major depression disorder patients and (...) healthy controls when freely listening to music. Constrained tensor factorization not only preserves the multilinear structure of the data, but also considers the common and individual components between the data. The proposed framework, combined with music information retrieval, correlation analysis, and hierarchical clustering, facilitated the simultaneous extraction of shared and unshared spatio-temporal-spectral feature patterns between/in MDD and HC groups. Finally, we obtained two shared feature patterns between MDD and HC groups, and obtained totally three individual feature patterns from HC and MDD groups. The results showed that the MDD and HC groups triggered similar brain dynamics when listening to music, but at the same time, MDD patients also brought some changes in brain oscillatory network characteristics along with music perception. These changes may provide some basis for the clinical diagnosis and the treatment of MDD patients. (shrink)

An assessment of the similarities and differences between space and time has played an important part in the development of the views of a number of philosophers about time. Examples of statements about time are compared with allegedly corresponding statements about space to give us analogies and disanalogies according to whether the statements have the same or different truth values. But what are the general principles on which such comparisons are based? In particular, according to what criteria are corresponding sentences (...) paired off? Are there any such general criteria? And if so, do they already presuppose a substantial commitment to one or other of the points of view at issue where analogies and disanalogies are discussed? This paper is concerned with two specific proposals for criteria of correspondence, one due to Richard Gale (1968, 1969) and James Garson (1969), which is rejected, and the other tentatively advanced in its place. (shrink)

The Chennai Metropolitan Area (CMA) is a rapidly evolving region that experiences significant changes in land use patterns over time. Analogous to other Indian cities, these transformations are particularly evident in the periphery of Chennai's urban core, where substantial land use shifts have occurred between 2001 and 2021. These changes were assessed utilizing LANDSAT 7 Thematic Mapper (TM), LANDSAT 5 Enhanced Thematic Mapper plus (ETM+) for the years 2001 and 2011, and LANDSAT 8 (OLI) for 2021. This study employs unsupervised (...) classification to investigate major land use/land cover alterations. Findings indicate that CMA has undergone substantial land use modifications over the past two decades. Notably, there has been a marked decline in open land and vegetation due to extensive reclamation for urban and commercial development. The results demonstrate that the area covered by open land and vegetation decreased by 70.23% and 4.56%, respectively, while the built-up area increased by 56%. The study also identified a pattern of urban expansion primarily along the GST road, OMR road, and Thirupati highway. The research further examines land use changes by creating buffer zones at distances of 500 meters, 1 km, 1.5 km, and 2 km. The detailed analysis, along with the spatio-temporal differentiation maps and tables generated through geospatial data, will be invaluable for understanding the growth dynamics of CMA. This information will also support the decision-making process for local planners, stakeholders, and academicians. (shrink)

In this study I propose an epistemological discussion of multiple spatio-temporal scales in neuroscience. Are such scales merely convenient levels of description of structure and function, or do they correspond to irreducible levels of brain organization? What criteria should we employ in order to reduce one level to another, or to identify levels that are not reducible to others? Should we think of these criteria as based on empirical and/or theoretical reasons? Beginning with an empirical criterion – the necessity of (...) different experimental methodologies for the measurement of different phenomena in the same system – I summarize spatial and temporal scales currently used in neuroscience and discuss the possibility of a more general theoretical criterion. I conclude that multiscaling should be recognized as a central concept in the epistemology of neuroscience. (shrink)

It is a standard assumption in contemporary metaphysics that concrete objects come with a location in space and time. This applies not only to material objects and events, but also modes (such as the roundness of the apple, the softness of the pillow, Socrates' wisdom) and entities that have been called 'disturbances' (e.g. holes, folds, faults, and scratches). Taking the approach of descriptive metaphysics, I will show that modes and disturbances fail to have a bearer-independent spatial location. This allows for (...) a metaphysical explanation of the Chomskyan contrast between 'There is a fly believed to be in the bottle' and the unacceptable 'There is a flaw believed to be in the argument'. A subsidiary point this paper makes is that in their lack of a direct spatial location, modes need to be sharply distinguished from tropes as a category of foundationalist metaphysics that has been at the center of a pursuit of a one-category ontology since Williams (1953). (shrink)

This paper presents an axiomatic formalization of a theory of top-level relations between three categories of entities: individuals, universals, and collections. We deal with a variety of relations between entities in these categories, including the sub-universal relation among universals and the parthood relation among individuals, as well as cross-categorial relations such as instantiation and membership. We show that an adequate understanding of the formal properties of such relations – in particular their behavior with respect to time – is critical for (...) geographic information processing. The axiomatic theory is developed using Isabelle, a computational system for implementing logical formalisms. All proofs are computer verified and the computational representation of the theory is available online. (shrink)