A perceptually based comparison of image similarity metrics

The assessment of how well one image matches another forms a critical component both of models of human visual processing and of many image analysis systems. Two of the most commonly used norms for quantifying image similarity are L1 and L2, which are specific instances of the Minkowski metric. However, there is often not a principled reason for selecting one norm over the other. One way to address this problem is by examining whether one metric, better than the other, captures the perceptual notion of image similarity. This can be used to derive inferences regarding similarity criteria the human visual system uses, as well as to evaluate and design metrics for use in image-analysis applications. With this goal, we examined perceptual preferences for images retrieved on the basis of the L1 versus the L2 norm. These images were either small fragments without recognizable content, or larger patterns with recognizable content created by vector quantization. In both conditions the participants showed a small but consistent preference for images matched with the L1 metric. These results suggest that, in the domain of natural images of the kind we have used, the L1 metric may better capture human notions of image similarity.     

The Racialized Body of the Educator and the Ethic of Hospitality: The Potential for Social Justice Education Re-visited

Derridean hospitality is seen to undergird ethical teacher–student interactions. However, hospitality is marked by three aporias that signal incommensurable and irreducible ways of being and responding that need to be held together in tension without eventual synthesis. Due to the sociopolitical materiality of race and the phenomenological difference that constitutes racialized bodies, educators of color in interaction with white students are called to live the aporetic tensions that characterize hospitality in distinctive ways that are not currently emphasized in the discourse on the educator’s responsibility as it is informed by an ethic of hospitality. The asymmetrical nature of hospitality is reconfigured through the terms of eros and hospitality’s link to education aimed at social justice is posited to be stronger than is currently suggested in the educational theory literature.     

Personality disorder in university students: a multitrait-multimethod matrix study.

The present study examined the prevalence of personality disorders (PDs) in a sample of first-year university students. The three self-report measures used to assess personality disorders were the (a) Coolidge Axis II Inventory (CATI); (b) Millon Clinical Multiaxial Inventory-II (MCMI-II); and (c) Minnesota Multiphasic Personality Inventory-Personality Disorder Scale (MMPI-PD). The prevalence of PD was estimated by including the number of participants above the cut-off scores selected for each of the three PD instruments. The results indicate prevalence in the range of 0% to 16% for the males, and approximately 1% to 26% for the females. These findings generally confirm the prevalence range of 5% to 15% reported in other investigations of nonpatient samples. With few exceptions, the three tests are generally consistent in their estimates of PD prevalence of all the 11 personality disorders. The multitrait-multimethod matrix reveals that the disorders are generally positively correlated with each other on all the three tests, suggesting considerable construct overlap. Specifically, passive-aggressive and schizotypal disorders produce the most convergent correlations. On the MMPI-PD, however, schizoid is a relatively more discriminant disorder.     

Collectivism coexisting with individualism: an Indian scenario

A sample of 292 respondents, drawn from three locations, participated in a study designed to examine the effects of eighteen situations on the choice of collectivist and individualist behaviour and intentions, or their combinations. The findings indicated that concerns for family or family members evoked a purely collectivist behaviour. Compelling and urgent personal needs and goals in conflict with the interests of family or friends led to a mix of individualist and collectivist behaviour and intentions. Individualist behaviour intended to serve collectivist interests was the third most frequently opted choice. Respondents' education had a significant effect and other background variables had indeterminate effects on the choice of either purely collectivist or a mix of collectivist and individualist behaviour and intentions.     

Can Determinism Give a Causal Explanation of Intentional Behaviour? Revisiting the Concepts of Determinism,Fatalism and Rational Agency

Journal of Indian Council of Philosophical Research - In this short piece of work, an attempt has been made to revisit the skepticism about free will, which has historically been directed to it due...     

Should assisted dying be legalised?

When an individual facing intractable pain is given an estimate of a few months to live, does hastening death become a viable and legitimate alternative for willing patients? Has the time come for physicians to do away with the traditional notion of healthcare as maintaining or improving physical and mental health, and instead accept their own limitations by facilitating death when requested? The Universities of Oxford and Cambridge held the 2013 Varsity Medical Debate on the motion “This House Would Legalise Assisted Dying”. This article summarises the key arguments developed over the course of the debate. We will explore how assisted dying can affect both the patient and doctor; the nature of consent and limits of autonomy; the effects on society; the viability of a proposed model; and, perhaps most importantly, the potential need for the practice within our current medico-legal framework.