The highly ordered neuronal projections from the retina to the tectum mesencephali (optic tectum) in several vertebrate groups have been intensively studied. Several hypotheses so far have been proposed, suggesting mechanisms to explain the topographical and biochemical specificity of the retinotectal projections during ontogeny. In the present paper we compare the main hypotheses of retinotectal development with respect to the nature of specificity envisaged, the activity-dependence versus inheritance criterium and the strategy of argument, in casu the descriptive versus interferential type (...) of argument. Matching of the current developmental hypotheses and mechanisms for elimination or persistance of contralateral, respectively ipsilateral connections, is attempted with respect to the known neuroanatomical connectivity data in the amphibian optic tectum and with respect to the symmetry relations between ipsilateral and contralateral connection patterns described in amphibians and other vertebrate groups. Local mechanisms influencing the survival potential of synaptic contacts between retinal afferents and tectal neurons are probably essential for generating global symmetry patterns. Finally, a global topological approach is discussed with respect to its applicability in the amphibian retinotectal projection system. Basic assumptions of topological modeling appear to rely on anatomical and functional properties of the visual system like left-right symmetry, dichotomy, (absence of) convergence and segregation of fibers and neurons into columnar information units. It is concluded however, that more neuroanatomical, physiological and ultrastructural data are needed to establish a formalized operation model of the amphibian retinotectal system. (shrink)

오늘날 프랑스현상학은 세 가지로 분류되는데 첫째 후설의 의식 중심의 선험적 관념론, 둘째 주체와 세계 사이의 조응이 요구되는 동위협력 현상학, 셋째 ‘주어진 바’(소여)를 중시하는 제 3세대의 실재론적 현상학이 그것들이다. 이같이 분류하게 됨은 현상학의 이해에 있어 핑크(20세기 전반)와 파토치카(20세기 후반)에 의해 블렌딩된 후설과 하이데거 사상이 모종의 역할을 했었기 때문이다. 게다가 후설현상학을 독창적으로 변주한 막스 셸러의 공감의 현상학이 이바지했다는 것도 부정할 수 없을 것이다. 이번 연구는 이러한 스펙트럼을 통해 21세기의 세계 현상학계를 주도하는 프랑스현상학자들의 면면을 밝혀내고 있다.

Geographic Information Science (GIS) is an interdisciplinary science aiming to detect and visually represent patterns in spatial data. GIS is used by businesses to determine where to open new stores and by conservation biologists to identify field study locations with relatively little anthropogenic influence. Products of GIS include topographic and thematic maps of the Earth’s surface, climate maps, and spatially referenced demographic graphs and charts. In addition to its social, political, and economic importance, GIS is of intrinsic (...) philosophical interest due to its methodological richness and because it is an instructive analogue to other sciences. This chapter works towards a philosophy of GIS and cartography, or PGISC. In particular, it examines practices of classifying geographic space, objects, and relations. By focusing on the use of natural kinds in data modeling and map generalization practices, I show how the making and using of kinds is contextual, fallible, plural, and purposive. (shrink)

Exposure to environmental contextual changes, such as those occurring after an earthquake, requires individuals to learn novel routes around their environment, landmarks, and spatial layout. In this study, we aimed to uncover whether contextual changes that occurred after the 2009 L’Aquila earthquake affected topographic memory in exposed survivors. We hypothesized that individuals exposed to environmental changes – individuals living in L’Aquila before, during and after the earthquake (hereafter called exposed participants, EPs) – improved their topographic memory skills compared (...) with non-exposed participants (NEPs) who moved to L’Aquila after the earthquake, as only EPs had to modify their previous cognitive map of L’Aquila. We also hypothesized that memory improvement was selective for the navigational space and did not generalize across other spatial and verbal domains. To test these hypotheses, we compared the topographic and spatial memory skills of 56 EPs without post-traumatic stress disorder symptoms to the skills of 47 NEPs using the Walking Corsi Test (WalCT; memory test in the navigational space) and the Corsi Block-Tapping Test (CBT; visuospatial memory test in the reaching space); EPs and NEPs were matched for gender, education and general navigational skills. A sub-group of participants also underwent the Rey-Auditory Verbal Learning Test (verbal memory test). The results showed that EPs, in contrast to NEPs, showed better performances on topographic learning assessed using the WalCT rather than spatial learning assessed by the CBT. This outcome suggests the possibility that EPs specifically improved topographic memory. This effect may be due to continuous exposure to environmental changes that have required individuals to learn novel paths within the city and integrate novel information, such as “new towns”, into their pre-existing mental representation of the city. Implications and limitations of the study are discussed. (shrink)

Love is an essential biological, psychological, sociological, and religious phenomenon. Using various conceptual models, philosophers have often distinguished between different types of love, such as self-love, romantic love, friendship love, love of God, and neighborly love. Psychologists and neuroscientists on the other hand have thus far focused predominantly on understanding the emotions and behavioral and neural mechanisms associated with romantic love and parental love. We do not yet know how the models construed by philosophers are related to actual experiences of (...) love, and to which extent they are merely nominal creations connecting phenomena that in fact have little to do with each other. We lack empirical knowledge of how different types of love are experienced as embodied feelings, and how these experiences are related to one another. Here we distinguished between 27 different types of love. Using self-report methods, we measured 1) how subjective feelings of different types of love are topographically embodied; 2) how different types of love are associated with self-reported emotional valence, strength of the bodily and mental experience, association with touch, time elapsed since last experienced, and controllability; and 3) how similar different types of love feel. Our study provides the first mapping of embodied experiences associated with different types of love. The results show that the subjective feelings associated with the love types form a continuum from strongly to weakly felt loves. (shrink)

This chapter focuses on two closely related diagrammatic maps of Jerusalem and the Holy Land in two thirteenth-century manuscripts now in Brussels and London. On the basis of a comparison between the maps and their transmission contexts it is argued that the maps served as didactic tools, aiding the study of biblical history. The layout of the maps is analysed in relation to wider developments in Western medieval manuscript production and learning during the second half of (...) the twelfth and first half of the thirteenth centuries, particularly in relation to the emphasis on a more systematic and rigorous structuring of knowledge. The manuscripts are seen as indicative of how topographical information concerning the Holy Land was put to use in biblical study, and of how scholasticism could have influenced the ways in which Jerusalem was represented and perceived. (shrink)

Flooding is one of the most damaging natural hazards globally. During the past three years, floods have claimed hundreds of lives and millions of dollars of damage in Iran. In this study, we detected flood locations and mapped areas susceptible to floods using time series satellite data analysis as well as a new model of bagging ensemble-based alternating decision trees, namely, bag-ADTree. We used Sentinel-1 data for flood detection and time series analysis. We employed twelve conditioning parameters of elevation, normalized (...) difference’s vegetation index, slope, topographic wetness index, aspect, curvature, stream power index, lithology, drainage density, proximities to river, soil type, and rainfall for mapping areas susceptible to floods. ADTree and bag-ADTree models were used for flood susceptibility mapping. We used software of Sentinel application platform, Waikato Environment for Knowledge Analysis, ArcGIS, and Statistical Package for the Social Sciences for preprocessing, processing, and postprocessing of the data. We extracted 199 locations as flooded areas, which were tested using a global positioning system to ensure that flooded areas were detected correctly. Root mean square error, accuracy, and the area under the ROC curve were used to validate the models. Findings showed that root mean square error was 0.31 and 0.3 for ADTree and bag-ADTree techniques, respectively. More findings illustrated that accuracy was obtained as 86.61 for bag-ADTree model, while it was 85.44 for ADTree method. Based on AUC, success and prediction rates were 0.736 and 0.786 for bag-ADTree algorithm, in order, while these proportions were 0.714 and 0.784 for ADTree. This study can be a good source of information for crisis management in the study area. (shrink)

This article takes a look back at the historical and philosophical context of the International Map of the World, humans’ first attempt at mapping the entire surface of the earth in detail on a uniform scale. Albrect Penck’s initial idea for a thoroughly detailed topographic map of the world, proposed at Fifth International Geographical Conference in 1891 and securing the support, both symbolic and financial, of many of the world’s governments by the first decades of the twentiethcentury, consisted of (...) a uniform series of hypsometrically-colored topographical maps overlaid with human data and dividing the world into consistently-scaled quadrangles. Envisioned by some geographers and cartographers as a component of the peace, both following both the First and then the Second World War, the project would come to be administered by international and non-governmental organizations by midcentury, as primary governmental support for cartography at that time increasingly reflected territorial interests and claims over and above those in favor of employing concepts of geographical knowledge that were not explicitly political or territorial. The slow demise of the project can be understood to signify the ultimate difficulty of a project that disacknowledged the fundamentality of politically constructed boundaries by employing another scale, in this case, a geometric scale with systematically geographical content, in order to frame its maps. (shrink)

“Articulate models” subservient to formal intelligence are imagined to be heterarchies of automata capable of performing the “symbolic (quasi-spatial) syntheses” of Luria (1973), where “quasi-spatial” points to the abstract core of spatiality: the symbol productions, combinations, and substitutions of algebraic reckoning. The alleged cognitive role of internal “topographic images” and of “efference copies” is confronted with this background and denied.

Existing behavioral, neuropsychological and functional neuroimaging data suggest that at least two major cognitive strategies are used for new word learning: fast mapping via context-dependent inference and explicit encoding via direct instruction. However, these distinctions remain debated at both behavioral and neurophysiological levels, not least due to confounds related to diverging experimental settings. Furthermore, the neural dynamics underpinning these two putative processes remain poorly understood. To tackle this, we designed a paradigm presenting 20 new spoken words in association with pictures (...) in either FM or EE settings, closely matched for auditory and visual features and overall task demands. We tested word acquisition using a range of behavioral measures as well as passive event-related potential responses, an established measure of word memory trace activation, and compared brain activity elicited by novel FM and EE words before and after the learning session. Behavioral data obtained in free recall, recognition and semantic word-picture matching tasks indicated successful acquisition of new words after just 10 exposures. Crucially, we found no behavioral evidence of different acquisition outcomes between FM and EE learning. ERP data, which exhibited the main response peaks at ~170, 250, and 520 ms, also indicated successful learning, with statistically different responses between novel and familiar words present only before, but not after the training, suggesting rapid formation of new neural memory circuits matching in activation those for previously known words. Furthermore, already at the earliest peak, we found different topographic distributions for the two learning types, with left-lateralized FM dynamics, suggestive of core language system involvement, and more diffuse activity for EE items, possibly suggesting the role of attention/executive control network. A similar effect also manifested later, at ~520 ms. Our data suggest that while both EE and FM learning can be successful for rapid word acquisition at the behavioral level, the diverging electrophysiological patterns suggest a dissociation between the neural systems underpinning these learning strategies. (shrink)

Walter Map was a twelfth-century courtier and royal servant. He was a prolific writer, but De Nugis Curialium is the only surviving work confidently attributed to him. The book is a collection of short stories and anecdotes about the court, religion and history. Map's references demonstrate that he read widely, not only biblical and theological works, but also classical authors such as Horace, Virgil, Ovid and Juvenal. The only surviving manuscript of the work is a fourteenth-century copy once belonging to (...) the monk John Wells of Ramsey Abbey. The Cambridge bibliographer M. R. James would have been attracted to the breadth of Map's referencing, and the author's light-hearted writing style which was intended to entertain. James' 1914 Oxford publication corrected the earlier work of Thomas Wright who published an edition for the Camden Society in 1850. (shrink)

The posterior parietal cortex (PPC) is the most likely site where egocentric spatial relationships are represented in the brain. PPC cells receive visual, auditory, somaesthetic, and vestibular sensory inputs; oculomotor, head, limb, and body motor signals; and strong motivational projections from the limbic system. Their discharge increases not only when an animal moves towards a sensory target, but also when it directs its attention to it. PPC lesions have the opposite effect: sensory inattention and neglect. The PPC does not seem (...) to contain a “map” of the location of objects in space but a distributed neural network for transforming one set of sensory vectors into other sensory reference frames or into various motor coordinate systems. Which set of transformation rules is used probably depends on attention, which selectively enhances the synapses needed for making a particular sensory comparison or aiming a particular movement. (shrink)

Short-term or working memory provides temporary storage of information in the brain after an experience and is associated with conscious awareness. Neurons sensitive to the multiple stimulus attributes comprising an experience are distributed within many brain regions. Such distributed cell assemblies, activated by an event, are the most plausible system to represent the WM of that event. Studies with a variety of imaging technologies have implicated widespread brain regions in the mediation of WM for different categories of information. Each kind (...) of WM may thus be expected to involve many brain regions rather than a local, uniquely dedicated set of cells. Neurons in a distributed “cell assembly” may be self-selected by their temporally coherent activations. The process by which this fragmented representation of the recent past is reassembled to accomplish essentially automatic and reliable recognition of a recurrent event constitutes an important problem. One plausible mechanism to achieve the identification of past with previous events would require that the representational system mediating WM must coexist in spatial extent and somehow overlap in temporal activation with cell ensembles registering input from subsequent events. The detection of such a postulated mechanism required an experimental approach which would focus upon spatial patterns of coherent activation while information about different events was stored in WM and retrieved, rather than focusing upon the temporal sequences of activation in localized regions of interest. For this purpose, the familiar delayed matching from sample task was modified. A series of information-free flashes, or “noncontingent probes,” was presented before an initial series of visual information items, the Priming Sample, which were to be held in WM during a Delay Period. A second series of visual information items were then presented, the Matching Sample. The task required detection of any item in the second series which had beenabsentfrom the initial series. Thirty such trials with a particular category of visual information constituted a single task. Several DMS tasks with this standardized design, but with different categories of visual information, were presented within each test session. The information categories included letters of the alphabet, single digit numbers, or faces from a school yearbook. Event-related potentials , were computed from 21 standardized electrode placements, separately for information-free probes and for information items in each interval of the trials within a task. Because each electrode is particularly sensitive to coherent activation of neurons in the immediately underlying brain regions, topographic maps were constructed and interpolated across the surface of the scalp. The momentary fluctuations of the resulting voltage “landscapes” throughout the task were then subjected to quantitative analysis. Distinctive landscapes sometimes persisted for prolonged periods, implying sustained engagement of very large populations of neurons. “Difference landscapes” were constructed by subtraction of topographic maps evoked by noncontingent probes during the Delay Period from maps of probe ERPs before the presentation of the initial information in the Priming Sample. Such probe difference landscapes displayed recurrent high similarity to momentary landscapes elicited during subsequent presentation of the information items in the Matching Sample. It seemed as if the distributed cell assembly continuously engaged by mediation of WM of the diverse attributes of the initial stimuli was being dynamically compared to the ensembles engaged by registration of the subsequent stimuli. Spatial Principal Component Analysis was applied to the sequences of momentary voltage landscapes observed throughout trials of each task. This method sought a small number of spatial patterns with which these large sets of inhomogeneous spatial distributions of voltage could be reconstructed. This is the spatial analog of the reconstruction of local ERPs by temporal principal components, as often described previously. Five Spatial Principal Components were found which accounted for about 90% of the total variance of voltage across the surface of the scalp throughout every task. Theloadings,or distinguishing topographic features, of these SPCs, were highly similar during every cognitive task for every subject. However,factor scores,or relative average contribution to the overall voltage distributions, of the different SPCs varied substantially among subjects between the tasks and momentarily within successive intervals of each task. These five SPCs may reflect coherent activation of huge distributed ensembles of neurons which comprise independent but interacting functional brain subsystems. These subsystems may correspond to basic resources available to individuals for allocation to mediate conscious evaluation of information during cognitive activity, providing a filter to bind together fractionated representations of the past to evaluate the present. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy, Psychiatry, & Psychology 12.3 (2005) 235-237 [Access article in PDF] Determined by Chaos: The Nonlinear Dynamics of Free Will Jessica Wahman Keywords free will, chaos theory, determinism, materialism In "antidepressants and the Chaotic Brain: Implications for the Respectful Treatment of Selves," Douglas Heinrichs provides an intriguing justification of individuated and longer term therapy for depressive clients. He does not reject medication as a therapeutic strategy, nor does he (...) question the materialist basis of the traditional medical model. Rather, he offers a physically deterministic account of depression that is at the same time compatible with a sense of human agency and individuality. Heinrichs suggests that human physiology and its psychiatric disorders are better accounted for by the nonlinear dynamics of chaos theory than by the traditional account of neurotransmitter production and reuptake. Because the latter, microscopic, explanation suggests a direct cause-and-effect relationship between synaptic activity and subjective affect, it cannot account for the wide variation of responses to the same medications, nor can it satisfy the client's fears that her drug-induced well-being is not fully hers to control. Chaos theory, he asserts, can provide a better explanation by treating the human organism as a complex holistic system whose patterns resemble a topographical map of probability more than they do a unidirectional vector model of cause to effect. Like the weather, human affect and behavior are physically determined but difficult to predict, and so careful attention to both the individual history of the client and the uniqueness of responses to medication are a necessary part of any successful therapeutic program.Connected to this theory of nonlinear physiology is Heinrichs's account of autonomy and agency under this rubric. He notes that a psychology based on chaos theory is not only compatible with the notion of free will, it can better explain why the successful use of medication actually increases freedom and autonomy instead of limiting it. It is here that I wish to focus my comments, because his interpretation of free will may give us, to borrow a phrase from Daniel Dennett, a "variet[y] of free will worth wanting" (1984, title page). Free will, in this case, is not a metaphysical ability to act above and beyond our material causes, but is instead a property of the material system itself, namely when that system feels itself capable of greater psychic mobility around the topographical map of probabilistic patterns.According to this model, our ability to reason, plan, and act on the decisions we make is itself a [End Page 235] part of our chaotically determined neurologic system. When we are healthy, we are able to reason in our best interests and act on those reasons. This is modeled as an ability for the organism to metaphorically "move about" the map of its own possibilities, and more important, to both enter and escape certain states, known as chaotic attractors, into which it is likely to be drawn. "Where" we wind up, psychologically speaking, at any point in time is determined by our own system, and so we may say that in such a case we are autonomous and our choices are made freely. Depression, on the other hand, can be compared to a deep groove in the map, a chaotic attractor that is hard to escape, and so the system quite literally becomes "stuck in a rut." This is subjectively experienced as the tendency for thought processes and activities to fall into negative and self-defeating patterns despite the best efforts of the client to escape these habits. So long as the organism does not have a sense of being "trapped" in an attractor (whether a depressive or, for example, manic or compulsive state), then that organism may be said to be free. Medication and the therapy that accompanies it, so far as it facilitates our ability to escape deep chaotic attractors, promotes our own freedom of will. If a car cannot spin its way out of a ditch, does the tow truck hinder or promote its freedom by hauling it back onto solid pavement where it may again... (shrink)

The binding problem is to explain how information processed by different sensory systems is brought together to unify perception. The problem has two sides. First, we want to explain phenomenal binding: the fact that we experience a single world rather than separate perceptual fields for each sensory modality. Second, we must solve a functional problem: to explain how a neural net like the brain links instances to types. I argue that phenomenal binding and functional binding require very different treatments. The (...) puzzle of phenomenal binding rests on a confusion and so can be dissolved. So only functional binding deserves explanation. The general solution to that problem is that information to be bound is arrayed along different dimensions. So sensory coding into separate topographic maps facilitates functional binding and there is no need based on the unity of perception for special mechanisms that bring "back together" information in different maps. (shrink)

. Ably marshalling ideas from theology, philosophy, and neurology, personality theorist Joseph F. Rychlak criticizes mechanistic psychologists' neglect of will and responsibility; these human qualities involve dialectically considering alternatives. I disagree with Rychlaks suggestion of fundamental mystery in the minds transcendence of the body and believe transcendent mind is intimately related to biological evolution and the brain. For example, dialectics, seen in simpler forms in lower animals, may require neural inhibition, feedback circuits, and topographic mappings. However, epistemologically speaking, neuroscientists (...) strongly need the human insights of work such as Rychlak's to understand the alternatives, in planning investigation at more microscopic levels. (shrink)

A ubiquitous feature of active sleep in mammals and birds is its relative abundance in early development. In rat pups across the first two postnatal weeks, active sleep promotes the expression of synchronized oscillatory activity within and between cortical and subcortical sensorimotor structures. Sensory feedback from self-generated myoclonic twitches – which are produced exclusively during active sleep – also triggers neural oscillations in those structures. We have proposed that one of the functions of active sleep in early infancy is to (...) provide a context for synchronizing developing structures. Specifically, neural oscillations contribute to a variety of neurodevelopmental processes, including synapse formation, neuronal differentiation and migration, apoptosis, and the refinement of topographic maps. In addition, synchronized oscillations promote functional connectivity between distant brain areas. Consequently, any condition or manipulation that restricts active sleep can, in turn, deprive the infant animal of substantial sensory experience, resulting in atypical developmental trajectories. The synchronization of rhythmic neural activity across brain structures provides evidence of communication. In developing sensorimotor networks, such oscillations are triggered most clearly and prominently during REM sleep. We propose that REM sleep provides a context for the emergence and expression of functional connectivity in the developing sensorimotor system. (shrink)

Identification of the molecular mechanisms underlying axonal branching in vivo has begun in several neuronal systems, notably the projections formed by dorsal root ganglion (DRG) neurons or retinal ganglion cells (RGC). cGMP signalling is essential for sensory axon bifurcation at the spinal cord, whereas brain‐derived neurotrophic factor (BDNF) and ephrinA signalling establish position‐dependent branching of RGC axons. In the latter system, the degradation of specific signalling components, via the ubiquitin‐proteasome system, may provide an additional mechanism involved in axon branching of (...) RGC. The process of arborisation is essential for neurons to innervate multiple targets and to build topographic maps. The various forms of branching found in different types of neurons are regulated by distinct signalling pathways activated by multiple extracellular cues in addition to axonal guidance factors. These signalling cascades, together with transcriptional programs, most likely interact and trigger the polymerisation or depolymerisation of the actin and tubulin cytoskeleton to regulate branching. (shrink)

Background and ObjectiveThere is a paucity of research that has explored “False Alarm” mechanisms. In order to remedy this deficiency in knowledge, the present study used event-related potential technology to reveal the mechanisms underlying False Alarm in response to fear stimuli.MethodsThis study selected snakes as experimental materials and the “oddball paradigm” was used to simulate the conditions of False Alarm. The mechanism underlying False Alarm was revealed by comparing cognitive processing similarities and differences between real snakes and toy snakes.ResultsEvent-related potential (...) findings demonstrated that there was no significant difference between N1 and P2 components induced by real and toy snakes in the early processing stage. Compared with toy snakes, real snakes induced smaller N2 amplitude, larger P3 amplitude, and a shorter P3 latency at the late processing stage. The results of brain topographic mapping analysis showed that the brain regions activated by a real or toy snake were basically the same within the time windows of 110–150 and 220–270 ms, respectively. In the time window of 300–360 and 400–500 ms, the degree of brain regions activation with a real snake was significantly greater than that induced by a toy snake.ConclusionFalse Alarm is caused by the brain’s inability to distinguish, in the early stage of cognitive processing, stimulus objects with similar appearances. When the brain is able to distinguish the differences between different stimulus objects in the late stage of cognitive processing, False Alarm disappears. (shrink)

Over 50 years have passed since Roger Sperry formulated a simple model of how visual space, as seen by the retina, can be projected onto the brain in a two‐dimensional, topographic map during development. Sperry posited a set of two orthogonal gradients in the retina that gives each cell a positional identity. He further suggested that these molecules could be used to match up with complementary gradients in the target field of the retinal projection, the tectum. While some investigators (...) hold that the existence of such molecules may not be necessary to establish retinotectal maps, recent work has identified several cell surface proteins whose distributions are of the type predicted by Sperry. An unexpected twist comes from culture assays demonstrating that inhibitory activities on tectal membranes can guide the growth of processes from retinal neurons. Moreover, the expression patterns of several enzymes and three transcription factors suggest that these proteins are candidates for regulatory agents in the determination of cell position in the retina. In addition, results from perturbation experiments support the candidacy of two of the enzymes, and a new mutant screen has uncovered several as yet unidentified genes that are required for establishment of the proper retinotectal map. A number of these results were presented at a recent meeting on neurospecificity held in Cargese, Corsica and sponsored by NATO and NSF. (shrink)

"What would Dewey say?" I seem to hear this question posed at least once at virtually every academic conference I attend. Following the typical pattern, the speaker goes on to submit for consideration whatever he thinks Dewey would say about the issue at hand. So why is this question so common? On some occasions, the speaker is addressing a subject—perhaps something contemporary—about which Dewey never spoke, at least not directly. Or, perhaps, he is responding to Dewey's tendency to work at (...) a high level of abstraction, offering topographical maps of some critical portion of the lived world while leaving the map reader to determine the relevant connections to contexts that are more local and concrete in nature. .. (shrink)

Air pollutants pose a threat to biodiversity throughout the world. This study was conducted to evaluate atmospheric element accumulation in Isparta city, including Gölcük Nature Park, located in the Western Mediterranean Region of Turkey. It is aimed to determine the air quality and potential pollutant sources in the region through lichen biomonitoring. Specimens of the epiphytic foliose lichen Physcia aipolia (Erh. ex Humb.) Fürnr. were sampled from 14 sites in the study area and analyzed by ICP-MS with reference material in (...) order to detect 11 trace elements; Al, As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, V, and Zn. The spatial distribution of these airborne elements in the study area was mapped. The results showed that the elemental sequence in terms of average concentrations measured was as follows: Ni >Cr >V >Fe >As >Al >Zn >Cu> >Cd >Mn >Pb. The results of cluster analyses of the elemental data indicated that the 3 major contaminants in the urban area were Cr, Ni, and V, probably due to the extensive use of coal in heating facilities and gasoline in vehicles. P. aipolia specimens accumulated maximal concentrations of As, Cr, Fe, Ni, and V in the northern and the southeastern localities surrounding the city, while Cd, Pb were most abundant in the eastern edge of Gölcük Nature Park. The pollution in Isparta city with heavy metal is worse than expected, mostly due to the extensive use of coal as fossil fuel. In addition, it seems to be associated with the city's topographic and climatic characteristics, e.g. inversion effects. (shrink)

Working memory is a limited capacity memory system that involves the short-term storage and processing of information. Neuroscientific studies of working memory have mostly focused on the essential roles of neural oscillations during item encoding from single sensory modalities (e.g., visual and auditory). However, the characteristics of neural oscillations during multisensory encoding in working memory are rarely studied. Our study investigated the oscillation characteristics of neural signals in scalp electrodes and mapped functional brain connectivity while participants encoded complex audiovisual objects (...) in a working memory task. Experimental results showed that theta oscillations (4–8 Hz) were prominent and topographically distributed across multiple cortical regions, including prefrontal (e.g., superior frontal gyrus), parietal (e.g., precuneus), temporal (e.g., inferior temporal gyrus), and occipital (e.g., cuneus) cortices. Furthermore, neural connectivity at the theta oscillation frequency was significant in these cortical regions during audiovisual object encoding compared with single modality object encoding. These results suggest that local oscillations and interregional connectivityviatheta activity play an important role during audiovisual object encoding and may contribute to the formation of working memory traces from multisensory items. (shrink)

I support Pylyshyn's skepticism that visual imagery reflects a re-activation of the spatial layout of active neurons embedded within a topographical cortical map of visual space. The pickup of visual information via successive eye movements presents one problem and the two visual systems model poses another difficulty.

Topography or topology is a mode of philosophical thinking that combines elements of transcendental and hermeneutic approaches. It is anti-reductionist and relationalist in its ontology, and draws heavily, if sometimes indirectly, on ideas of situation, locality, and place. Such a topography or topology is present in Heidegger and, though less explicitly, in Hegel. It is also evident in many other recent and contemporary post-Kantian thinkers in addition to Kant himself. A key idea within such a topography or topology is that (...) of triangulation—an idea that appears explicitly in the work of Donald Davidson. Triangulation captures the idea of the topographical domain as constituted through the mutual relatedness of the elements within it, and as only to be understood through the mapping out of such relatedness—in the case of the topographical domain that is the world, through the relatedness of self, other, and thing. (shrink)

The following points are discussed in response to the commentaries: (1) A taxonomy of perceptual completion phenomena should rely on both phenomenological and mechanistic criteria. (2) Certain forms of perceptual completion are caused by topographically organized neural processes the view that there must be a pictorial or spatial neural-perceptual isomorphism at the bridge locus – should be rejected. Although more abstract kinds of isomorphism are central to the neural-perceptual mapping, the perceptual cannot be exhaustively explained in terms of the neural, (...) and therefore the explanation of perception cannot be reduced to uncovering neural-perceptual isomorphisms. (5) The task of vision is to guide action in the world, not to construct a detailed world-model in the head. (6) Neural filling-in facilitates the integration of information and thereby helps the animal find out about its environment. (7) Perceptual content needs to be understood at the level of the person or animal interacting in the world. (shrink)

The spread of Islam from the Arabian Peninsula to the North Africa and al-Andalus in the west, to the Chinese borders and the Indian Subcontinent in the east, helped Muslims to establish close contact with many different cultures. One of the consequences of this is that both the increase in scientific accumulation and the emergence of new needs in military, financial and similar aspects accelerated the studies on geography. Islamic geographers of the first period, not only did they describe the (...) cities to which they travelled but also they depicted the cities about which they could collect data. These first works, which can be considered as a kind of written maps, have some common features, although they are written in different geographies and revealed by different schools. One of these common points is the terminology that they used in depictions of cities. This terminology suggests that there was a common city typology among Muslim geography scholars that stands out in the depiction of cities. In this study, particularly we will try to answer a number of questions such as what the concepts of authors are and what they mean and the relationship between these concepts by examining the uses of authors in their works.SummaryThe depictions of settlements which were designated as madīna in the works of the medieval Muslim geographers have some common characteristics. One of them is the terminology used by the authors in depictions of cities. In this study, particularly I tried to answer a number of questions such as what the concepts of authors are and what they mean and the relationship between these concepts by examining the uses of authors in their works. Then, a common city typology which is prominent in the depiction of cities among the Muslim geography scholars has been put forward. The structural elements that are considered to constitute this typology also revealed the topographic elements of a city at that time.The cities conquered by muslims had a great impact on the emergence of the terminology used by Muslim geographers in depicting cities. I can say that especially Persian influence; the cities in Iran, Khurāsān which were captured from the Sāsānians and Mā Warāʾ al-Nahr districts was effective. However, geography writers did not restrict using this terminology for only these regions, they also had continued to use in depiction of other regions such as North Africa and al-Andalus. This means that a common language and terminology emerged and started to be used.Geography authors point to five main elements that I have examined in separate titles while describing Islamic cities that they called "madīna". These are kuhandiz, shahristān, rabad, the part so-called “the adjacent agricultural fields / agricultural fields surrounded by wall” by us and the last part rustāq connected to main city center. Depending on ways of development of cities, these elements sometimes developed from inside to out, in other words from center to environment, sometimes surrounded by independent walls and sometimes adjacent to each other. However, a city did not have to have all these elements at the same time. This situation was totally related to development level of city, and the cities which had all these elements were the military, administrative and economically developed centers of the period. From the methodical point of view, it should be noted that the examples given in the study were selected from among the other cities in order to ensure that to understand the subject in best way and ensure that the silhouette on the city typology is seen better. Because it is possible to find examples of each element in all city depictions of Islamic geography writers. Kuhandiz, shahristān/madīna, and rustāq are the elements that can be seen in the pre-Islamic period. It is possible to think of the Islamic period as a period in which these words were conceptualized, new madīnas and rabads were formed, surrounded by walls and rabads were gradually transformed into madīnas. In geography texts, it is seen that there is a concept confusion between kuhandiž and buildings named qalʿa, ḥiṣār and ḥiṣn. However, as some writers hade tried to emphasize, "kuhandiz" had been using for these structures which were previously known as fortress (especially ḥiṣn or qalʿa) due to their proportion to shahristāns / madīnas of city centers, and were notably seen in the regions of Khurāsān and Mā Warāʾ al-Nahr. Kuhandižs represent the centers of pre-Islamic cities and were continued to be used for the same purpose in the early Islamic period. But, these old areas were gradually abandoned due to the development of new parts of settlement under Muslim administration. Shahristāns were residential areas where the majority of people lived. With the Islamic period, the word “shahristān” had been terminologically changed to “madīna” and use of this concept by scientific circles was gradually disappeared in time. At this point, it is one of the issues to be considered in the examination of geography works that the use of “madīna” in Arabic both for the concept of the city in which we examine the structural elements in this article, and for “shahristān” which is one of the elements of the city.As it is understood from the geographical texts, madīna was continued to be established by Muslims in cities for centuries. These are also examples of change in cities as a result of development and housing activities after the conquests. However, we don’t have much information in the geography works about the cities which had more than one shahristān /madīna before the inhabit of Muslims. As far as we can reach, the only example in our resources with multiple madīnas/shahristān belonging to the pre-Islamic period is Bukhara.As in the developed cities of the period such as Bukhara, Samarqand, Marw and Balkh, it is seen a generaly circular fortification wall which usually surrounded main center of cities including kuhandizs, madīnas/ shahristān and mostly later rabads. So, it is more appropriate to consider the areas between these walls and other parts of city (kuhandiz, shahristān/madīna, rabad) as an independent element because of the fact that they were lands with determined borders and were defined by separate concepts. I have used “adjacent agricultural area” for this element for now. Thus, this area constitutes one of the structural elements of the cities.Rustāqs were parts of Persian-Sāsānian urbanization and land administration, and had continued to be partially implemented during the Islamic period. They were the source of livelihood of the cities from foundation stage and were an indispensable tool of the society based on agriculture in that ages. Depending on size, the cities could have dozens of them. As can be seen in the case of Balkh, the rustāḳs especially connected to the big city centers were not composed of one or several villages. Moreover, these rustāqs could contain big settlements called madīna which were their centers. (shrink)

There is an obvious paradox in any attempt to map the topography of Paradise, for Paradise, theologians assure us, is outside of space as well as time. Yet mapping Paradise is what Dante's poem, the Paradiso, attempts to do. For the two preceding realms of the afterlife, hell and purgatory, Dante provides numerous finely articulated descriptions of rigorously ordered regions. And again for Paradise, the variegated states of the souls making up the spiritual order of the realm are expressed very (...) precisely by a topographical scheme, one in this case based on Ptolemy's system of the heavens. The seven planetary spheres are followed by the sphere of the fixed stars and the primum mobile, the whole finally bordering on the completely nonspatial heaven of the Empyrean. But this last “sphere” alone is Paradise in the full and strict sense. As Dante has Beatrice explain in canto 4.28–48, the whole poem attempts to describe this totally nonspatial order in terms of the array of the nine physical heavens as metaphorical correlatives for the successive degrees of beatitude experienced by the souls “in” the Empyrean. Paradise in this sense—as the Empyrean—is thus utopic, if any place is: it is literally “no place” at all. (shrink)

Sur la base de visions alternatives de l'avenir de l'échange , le présent article situe dans une topographie analytique quatre arguments qui militent en faveur d'une vision qui laisse la place à l'inattendu et à la variabilité. Il entend souligner que le droit reste un moyen d'action privilégié pour construire les avenirs possibles.Starting from alternative visions of the future in terms of what is exchanged and traded, and how, this paper maps out a topographical analysis of four arguments favouring (...) a vision that leaves room for the unexpected and for variability, and underlines the role of haw as a key factor in building possible futures. (shrink)

In this article I offer an account and analysis of several patterns of valuation of the cardinal directions in medieval Scandinavian texts. While my topic is not altogether novel—ideas about space, along with those of time, have been matters of widespread and perennial concern to scholars of culture and religion, and those interested in the Norse context have proven no exception—I seek to go beyond previous examinations in several ways. First, many of the scholars who have focused on directionality in (...) Old Norse sources have been concerned with catalogu-ing and elucidating terminology for the cardinal points and for movement along and between them, with a particular emphasis on assessing the “correctness” of such terms' application in respect to ultimate or relative orientation. While I draw on the insights of such studies, my interests lie less in efforts to map or to describe movement in the real world known to medieval Scandinavians than in the values that they can be shown to have attached to the cardinal directions. My focus, therefore, is on imagined or moral as opposed to physical or topographical space. Of the studies that have taken a similar interest in Norse ideas about space, most have focused mainly or exclusively on the attempt, often from a structuralist perspective, to reconstruct from available sources pagan cosmography, to discover or assemble a systematic summa of the pre-Christian Norse mythical Weltbild. While pre-Christian ideas, or their traces, are also a focus of my article, I pay more than equal attention to conceptualizations and valuations of space held by Christian northerners. “Mythical,” then, is not a label that I reserve for heathen or patently fantastic materials but one under which I also subsume data from Christian and historiographical sources. (shrink)

Maps and mapping raise questions about models and modeling and in science. This chapter archives map discourse in the founding generation of philosophers of science (e.g., Rudolf Carnap, Nelson Goodman, Thomas Kuhn, and Stephen Toulmin) and in the subsequent generation (e.g., Philip Kitcher, Helen Longino, and Bas van Fraassen). In focusing on these two original framing generations of philosophy of science, I intend to remove us from the heat of contemporary discussions of abstraction, representation, and practice of science and (...) thereby see in a more distant and neutral light the many productive ways in which maps can stand in analytically for scientific theories and models. The chapter concludes by complementing the map analogy – i.e., a scientific theory is a map of the world – with a model analogy, viz., a scientific model is a vehicle for understanding. (shrink)

Schönau et al. (2021) identified four dimensions of agency (authenticity, privacy, self–trust, and responsibility) that may be influenced by the use of neurotechnologies, such as deep brain stimulation (DBS) or brain–computer–interfaces (BCI). The Agency Map they proposed depicts the role of each dimension, and indicates how they may interact. The authors emphasize that a strength of their approach is that it allows to capture the agency dimensions that were previously seen as disconnected and independent as intricately interwoven parts of the (...) person’s experience. This intended unification may help to understand personal agency more fully in various contexts important in neuroethical considerations. However, what is missing in Schönau et al.’s analysis is the mechanism—the very link— by which these various dimensions can come together. As Zawadzki (2020) points out discussing his account of the self (PTS–moral aspects)—which also includes the agency dimensions indicated by Schönau et al. (both authenticity, and responsibility, but also autonomy)—what is crucial in order to unify these various dimensions is narrative. (shrink)

Postmodern alienation -- Jameson's dialectical levels -- Baudrillard's hostile worlds -- Foucault's system of thought.