A stochastic prey-predator system in a polluted environment with Beddington-DeAngelis functional response is proposed and analyzed. Firstly, for the system with white noise perturbation, by analyzing the limit system, the existence of boundary periodic solutions and positive periodic solutions is proved and the sufficient conditions for the existence of boundary periodic solutions and positive periodic solutions are derived. And then for the stochastic system, by introducing Markov regime switching, the sufficient conditions for extinction or persistence of such system are (...) obtained. Furthermore, we proved that the system is ergodic and has a stationary distribution when the concentration of toxicant is a positive constant. Finally, two examples with numerical simulations are carried out in order to illustrate the theoretical results. (shrink)

This paper investigates the diffusive predator-prey system with nonmonotonic functional response and fear effect. Firstly, we discussed the stability of the equilibrium solution for a corresponding ODE system. Secondly, we established a priori positive upper and lower bounds for the positive solutions of the PDE system. Thirdly, sufficient conditions for the local asymptotical stability of two positive equilibrium solutions of the system are given by using the method of eigenvalue spectrum analysis of linearization operator. Finally, the existence and nonexistence (...) of nonconstant positive steady states of this reaction-diffusion system are established by the Leray–Schauder degree theory and Poincaré inequality. (shrink)

This paper investigates a stochastic two-patch predator-prey model with ratio-dependent functional responses. First, the existence of a unique global positive solution is proved via the stochastic comparison theorem. Then, two different methods are used to discuss the long-time properties of the solutions pathwise. Next, sufficient conditions for extinction and persistence in mean are obtained. Moreover, stochastic persistence of the model is discussed. Furthermore, sufficient conditions for the existence of an ergodic stationary distribution are derived by a suitable Lyapunov function. (...) Next, we apply the main results in some special models. Finally, some numerical simulations are introduced to support the main results obtained. The results in this paper generalize and improve the previous related results. (shrink)

In his recent article ‘Consciousness and Reduction’, Ausonio Marras argues that functional reduction must appeal to bridge laws and thus does not represent a genuine alternative to Nagelian reduction. In response, I first argue that even if functional reduction must use bridge laws, it still represents a genuine alternative to Nagelian reduction. Further, I argue that Marras does not succeed in showing that functional reduction must use bridge laws. Introduction Nagelian Reduction, Functional Reduction, and Bridge Laws (...) Marras on Functional Reduction The Logical Space of ‘Bridge Law’ Views of Reduction [RP] as an Account of Realization Conclusion CiteULike Connotea Del.icio.us What's this? (shrink)

Psychopathy, executive functions, and neuropsychological data: a response to Sifferd and Hirstein.

This article is a response to Bernard Matolino’s criticisms against Ifeanyi Menkiti’s elucidations on the normative notion of personhood in African philosophy. This article argues that Menkiti’s article is best understood to be ultimately focused on articulating the normative notion of personhood; so understood, Menkiti’s analysis eschews many of the objections made against it by Matolino. We show that the confusion lies in a general failure in African philosophy to distinguish three distinct senses of the notion of a person. We (...) further show how the referent ‘it’ as used to pick out infants by Menkiti, contrary to Matolino’s analysis that suggests that it is an instance of ‘mal-function’ may be charitably construed to be capturing the idea that infants have moral status and/or that they are morally neutral. A defense of Menkiti’s idea of personhood is crucial in a search for a robust African perfectionist ethics. Keywords: ‘It’, Moral agency, Moral Perfectionism, Moral status, Personhood. (shrink)

This paper is a critical assessment of M. W. Rowe's functional definition of art.

This article is a response to Bernard Matolino’s criticisms against Ifeanyi Menkiti’s elucidations on the normative notion of personhood in African philosophy. This article argues that Menkiti’s article is best understood to be ultimately focused on articulating the normative notion of personhood; so understood, Menkiti’s analysis eschews many of the objections made against it by Matolino. We show that the confusion lies in a general failure in African philosophy to distinguish three distinct senses of the notion of a person. We (...) further show how the referent ‘it’ as used to pick out infants by Menkiti, contrary to Matolino’s analysis that suggests that it is an instance of ‘mal-function’ may be charitably construed to be capturing the idea that infants have moral status and/or that they are morally neutral. A defense of Menkiti’s idea of personhood is crucial in a search for a robust African perfectionist ethics. (shrink)

The human neuroendocrine system is highly sensitive to the social environment. Hormones such as testosterone and cortisol are released in response to a wide variety of social stimuli. The evolutionary functions of this sensitivity are not well understood. Longitudinal monitoring of hormones, behavior, and social environment is a promising research paradigm for solving these evolutionary puzzles.

In his recent article ‘Consciousness and Reduction’, Ausonio Marras argues that functional reduction must appeal to bridge laws and thus does not represent a genuine alternative to Nagelian reduction. In response, I first argue that even if functional reduction must use bridge laws, it still represents a genuine alternative to Nagelian reduction. Further, I argue that Marras does not succeed in showing that functional reduction must use bridge laws. 1. Introduction2. Nagelian Reduction, Functional Reduction, and Bridge (...) Laws3. Marras on Functional Reduction4. The Logical Space of ‘Bridge Law’ Views of Reduction5. [RP] as an Account of Realization6. Conclusion. (shrink)

ObjectiveBulimia nervosa and binge eating disorder are eating disorders characterized by recurrent binge eating episodes. Overlap exists between ED diagnostic groups, with BE episodes presenting one clinical feature that occurs transdiagnostically. Neuroimaging of the responses of those with BN and BED to disorder-specific stimuli, such as food, is not extensively investigated. Furthermore, to our knowledge, there have been no previous published studies examining the neural response of individuals currently experiencing binge eating, to low energy foods. Our objective was to examine (...) the neural responses to both low energy and high energy food images in three emotive categories in BN and BED participants.MethodsNineteen females with BN or BED, comprising the binge eating group, and 19 age-matched healthy control ’s completed thorough clinical assessment prior to functional MRI. Neural response to low energy and high energy foods and non-food images was compared between groups using whole-brain exploratory analyses, from which six regions of interest were then selected: frontal, occipital, temporal, and parietal lobes; insula and cingulate.ResultsIn response to low energy food images, the BEG demonstrated differential neural responses to all three low energy foods categories compared to HCs. Correlational analyses found a significant association between frequency of binge episodes and diminished temporal lobe and greater occipital lobe response. In response to high energy food images, compared to HC’s, the BEG demonstrated significantly decreased neural activity in response to all high energy food images. The HC’s had significantly greater neural activity in the limbic system, occipital lobe, temporal lobe, frontal lobe, and limbic system in response to high energy food images.ConclusionResults in the low energy food condition indicate that binge frequency may be related to increased aberrant neural responding. Furthermore, differences were found between groups in all ROI’s except the insula. The neural response seen in the BEG to disgust food images may indicate disengagement with this particular stimuli. In the high energy food condition, results demonstrate that neural activity in BN and BED patients may decrease in response to high energy foods, suggesting disengagement with foods that may be more consistent with those consumed during a binge eating episode. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Changing Functions, Moral Responsibility, and Mental IllnessCraig Edwards (bio)Keywordsmental illness, responsibility, character, dysfunction, personhoodI thank both Wakefield and Tomasini for their illuminating comments. Both commentaries are thought provoking and warrant a full response. However, as always, space is limited and I must make the all-too-predictable apology for not addressing both commentaries in full. Wakefield's contribution more directly engages with, and challenges, my claims, and so I focus (...) on addressing his concerns.ClarificationsWakefield correctly notes that I am interested in how mental illness (and illness generally) operates to remove moral responsibility for one's actions. Despite this, it seems at several points that he and I are talking about two different, albeit related, concepts of mental illness. 'Mental illness' is used to both explain and excuse certain behaviors, but these two functions, explanatory and exculpable, do not always operate simultaneously. As we discover biological explanations for apparently immoral behaviors, the question arises as to whether the explanation should remove the immorality and liability for punishment. The 'sick role' can be divided into two aspects. One is the role of deserving and warranting medical treatment. The other is the negation of moral responsibility. Wakefield's own example, pedophilia, involves the first sense of the sick role but not the second. Wakefield's use of this example is unusual, because it deftly highlights the limitation of his HD account. Pedophilia is a mental disorder in the sense of warranting treatment, and is a mental illness under Wakefield's model, but it is not something that negates moral responsibility. There is a sense of the term 'mental illness'—an important and, as I argue, an objective sense—that is relevant to establishing one's moral responsibility for such behaviors.In addressing my account of mental illness as though it contained two distinct answers, 'mental illness as dysfunction of rational agency, or 'mental illness as moral judgment,' it is unclear whether Wakefield takes them to be conjunctive or alternative. Hence it is worth reiterating in point form the structure of my account:1. Illness involves dysfunction;2. The 'proper function' of a bodily or psychological mechanism is determined by the purpose that we impose upon that mechanism (within the constraints of our biological needs);3. Dysfunction of rational agency is necessary, but not sufficient, for 'mental illness' in the normative sense relevant to negating moral responsibility; and [End Page 105]4. The distinction between 'mental illness' (in the above sense) and the many dysfunctions of rational agency for which we are morally responsible, turns upon (objective) normative facts rather than features internal to the dysfunctions themselves.Functions and ValueWakefield misses the point when he criticizes my comment that, although bodily mechanisms are fairly uniformly valued, there is substantial historical and cross-cultural variation in the way people value personhood. He notes—accurately, but irrelevantly—that people almost always place great value on their capacity for rational agency, probably more so than many aspects of their physical health. My comment, taken in context, has nothing to do with how much people value personhood, but has everything to do with what kinds of purposes people want their mental and physical processes to achieve. A heart has the same function for a Londoner today as it did for a Japanese peasant a thousand years ago, and although it is possible for us to want it to achieve other purposes, any culture that seriously imputes a different set of vital functions on the heart is likely to be rather disappointed. By contrast, our species has experienced vast changes in the demands we make of our rational and intellectual capacities—dysfunctions like dyslexia and alcoholism were irrelevant before the availability of written communication and alcohol.Wakefield's HD account is unable to deal with the relevance of such change. The link between evolutionary function and illness is tenuous in any event. Evolutionary explanations of specific mechanisms are often untestable, simply positing some evolutionary purpose that happens to fit our understanding of what the mechanism does. If we were to discover that alcoholism evolved as a means of increasing birthrates, or (perhaps more plausibly) that anxiety disorders occur among those for whom... (shrink)

Micro-expressions can reflect an individual’s subjective emotions and true mental state, and they are widely used in the fields of mental health, justice, law enforcement, intelligence, and security. However, one of the major challenges of working with MEs is that their neural mechanism is not entirely understood. To the best of our knowledge, the present study is the first to use electroencephalography to investigate the reorganizations of functional brain networks involved in MEs. We aimed to reveal the underlying neural (...) mechanisms that can provide electrophysiological indicators for ME recognition. A real-time supervision and emotional expression suppression experimental paradigm was designed to collect video and EEG data of MEs and no expressions of 70 participants expressing positive emotions. Based on the graph theory, we analyzed the efficiency of functional brain network at the scalp level on both macro and micro scales. The results revealed that in the presence of MEs compared with NEs, the participants exhibited higher global efficiency and nodal efficiency in the frontal, occipital, and temporal regions. Additionally, using the random forest algorithm to select a subset of functional connectivity features as input, the support vector machine classifier achieved a classification accuracy for MEs and NEs of 0.81, with an area under the curve of 0.85. This finding demonstrates the possibility of using EEG to recognize MEs, with a wide range of application scenarios, such as persons wearing face masks or patients with expression disorders. (shrink)

There has been a fair amount of recent discussion about the implications that advances in neuroscience will have on the law and, in particular, legal responsibility. This discussion has been varied and includes, for example, the potential impact of neuroimaging techniques to reveal whether a defendant or witness is telling the truth, and consideration of whether our growing knowledge of brain function will warrant a revision in the law to make it more psychologically relevant.Tom Buller, Ph.D., is Associate Professor (...) of Philosophy at the University of Alaska Anchorage. His main research interests are in bioethics and neuroethics. (shrink)

Background: Electroconvulsive therapy is one of the most effective treatments for major depressive disorder. Recently, there has been increasing attention to evaluate the effect of ECT on resting-state functional magnetic resonance imaging. This study aims to compare rs-fMRI of depressive disorder patients with healthy participants, investigate whether pre-ECT dynamic functional network connectivity network estimated from patients rs-fMRI is associated with an eventual ECT outcome, and explore the effect of ECT on brain network states.Method: Resting-state functional magnetic resonance (...) imaging data were collected from 119 patients with depression or depressive disorder, and 61 healthy participants, with an age mean of 52.25 years old. The pre-ECT and post-ECT Hamilton Depression Rating Scale were 25.59 ± 6.14 and 11.48 ± 9.07, respectively. Twenty-four independent components from default mode and cognitive control network were extracted, using group-independent component analysis from pre-ECT and post-ECT rs-fMRI. Then, the sliding window approach was used to estimate the pre-and post-ECT dFNC of each subject. Next, k-means clustering was separately applied to pre-ECT dFNC and post-ECT dFNC to assess three distinct states from each participant. We calculated the amount of time each subject spends in each state, which is called “occupancy rate” or OCR. Next, we compared OCR values between HC and DEP participants. We also calculated the partial correlation between pre-ECT OCRs and HDRS change while controlling for age, gender, and site. Finally, we evaluated the effectiveness of ECT by comparing pre- and post-ECT OCR of DEP and HC participants.Results: The main findings include depressive disorder patients had significantly lower OCR values than the HC group in state 2, where connectivity between cognitive control network and default mode network was relatively higher than other states, Pre-ECT OCR of state, with more negative connectivity between CCN and DMN components, is linked with the HDRS changes. This means that those DEP patients who spent less time in this state showed more HDRS change, and The post-ECT OCR analysis suggested that ECT increased the amount of time DEP patients spent in state 2.Conclusion: Our finding suggests that dynamic functional network connectivity features, estimated from CCN and DMN, show promise as a predictive biomarker of the ECT outcome of DEP patients. Also, this study identifies a possible underlying mechanism associated with the ECT effect on DEP patients. (shrink)

This paper investigates, from a philosophical perspective, whether high functioning autists are legally responsible for the crimes they may commit. We do this from the perspective of the Croatian legal system. According to Croatian Criminal Law, but also criminal laws adopted in many other countries, the legal responsibility of the person is undermined due to insanity when two conditions are satisfied. The first may be called the incapacity requirement. It states that a person, when committing the crime, suffers cognitive (...) or volitional incapacities or limited capacities that are relevant for exculpation. The second, we may call the mental disorder requirement, which states that these exculpatory incapacities are due to the presence of a mental disorder. In this paper we focus on the incapacity requirement. The review of the studies on executive functions deficits associated with high-functioning autism suggests that many autists should not be held categorically responsible for the crimes they may commit. Nonetheless, we argue that these impairments in executive functions generally do not provide an unqualified excuse. (shrink)

The pandemic has impacted various industries, including the sports industry. However, corporate social responsibility can mitigate the adverse effects of the crisis and promote the sports industry. To analyze the effect of CSR, the study examined the impact of perceived corporate social responsibility on injury prevention expectation, injury risk perception, and health up-gradation with the mediation of sports safety measures. There are 259 sportsmen of local sports bodies provided the data through a self-administered survey. Data analysis was conducted (...) through Smart-PLS and SEM techniques. The outcome of the analysis showed that perceived corporate social responsibility leads to injury prevention expectation, injury risk perception, and health up-gradation. Also, the study found that sports safety measure mediates the relationship between perceived corporate social responsibility and injury prevention expectation, between perceived corporate social responsibility and injury risk perception, and between perceived corporate social responsibility and health up-gradation among sportsmen of local sports bodies. The theoretical implications were presented related to the significance of CSR and sports safety measure and their impact on sportsmen injury prevention expectation, health, and risk perception. The practical implications were related to the management of local sports bodies and how they can induce CSR initiatives and programs. Some limitations related to sample size, incorporating other variables, examining the model in other contexts, and using different study designs, have also been mentioned in the study. (shrink)

We thank the authors of commentaries for their thoughtful discussion of our target article. Here we briefly summarize the points made in the target article (Nair-Collins and Joffe 2023). Then we em...