Formation of ω -Al7Cu2Fe phase during laser processing of quasicrystal-forming Al–Cu–Fe alloy

The formation of an ω-Al₇Cu₂Fe phase during laser cladding of quasicrystal-forming Al₆₅Cu_23.3Fe_11.7 alloy on a pure aluminium substrate is reported. This phase is found to nucleate at the periphery of primary icosahedral-phase particles. A large number of ω-phase particles form an envelope around the icosahedral phase. On the outer side, they form an interface with an α-Al solid solution. Detailed transmission electron microscopic observations show that the ω phase exhibits an orientation relationship with the icosahedral phase. Analysis of experimental results suggests that the ω phase forms by precipitation on an icosahedral phase by heterogeneous nucleation and grows into the aluminium-rich melt until supersaturation is exhausted. The microstructural observations are explained in terms of available models of phase transformations.     

Credal imprecision and the value of evidence

This paper is about a tension between two theses. The first is Value of Evidence: roughly, the thesis that it is always rational for an agent to gather and use cost-free evidence for making decisions. The second is Rationality of Imprecision: the thesis that an agent can be rationally required to adopt doxastic states that are imprecise, i.e., not representable by a single credence function. While others have noticed this tension, I offer a new diagnosis of it. I show that it arises when an agent with an imprecise doxastic state engages in an unreflective inquiry, an inquiry where they revise their beliefs using an updating rule that doesn't satisfy a weak reflection principle. In such an unreflective inquiry, certain synchronic norms of instrumental rationality can make it instrumentally irrational for an agent to gather and use cost-free evidence. I then go on to propose a diachronic norm of instrumental rationality that preserves Value of Evidence in unreflective inquiries. This, I suggest, may help us reconcile this thesis with Rationality of Imprecision.     

Reciprocity and the height of God: A defence of Buber against Levinas

Conclusion In this essay I have tried to show that the Buber’s notion of the I-Thou relation is not a reciprocal relation and therefore does not turn God into an equal. The word “Thou” merely indicates the initiative on the part of an I of turning toward and addressing that which confronts the I. In speaking “Thou,” the I does not reduce the other to an object, that is, an It. Hence, one allows the other to be as it is. More importantly, the action of speaking “Thou” is also an address and turning toward God. In so doing, the I has not reduced God to an equal, as Levinas fears.     

Categorical and algebraic aspects of Martin-Löf Type Theory

In the paper there are introduced and discussed the concepts of an indexed category with quantifications and a higher level indexed category to present an algebraic characterization of some version of Martin-Löf Type Theory. This characterization is given by specifying an additional equational structure of those indexed categories which are models of Martin-Löf Type Theory. One can consider the presented characterization as an essentially algebraic theory of categorical models of Martin-Löf Type Theory. The paper contains a construction of an indexed category with quantifications from terms and types of the language of Martin-Löf Type Theory given in the manner of Troelstra [11]. The paper contains also an inductive definition of a valuation of these terms and types in an indexed category with quantifications.     

Argument,Inference, and Persuasion

This paper distinguishes between two types of persuasive force arguments can have in terms of two different connections between arguments and inferences. First, borrowing from Pinto (in Argument, inference, and dialectic, Kluwer Academic Pub, Dordrecht, 2001), an arguer's invitation to inference directly persuades an addressee if the addressee performs an inference that the arguer invites. This raises the question of how invited inferences are determined by an invitation to inference. Second, borrowing from Sorenson (J Philos 88:245–266, 1991), an arguer's invitation to inference indirectly persuades an addressee if the addressee performs an inference guided by the argument even though it is uninvited. This raises the question of how an invitation to inference can guide inferences that the arguer does not use the argument to invite. Focusing on belief-inducing inference, the primary aims here are (i) to clarify what is necessary for an addressee's belief-inducing inference to be invited by an argument used as an instrument of persuasion; and (ii) to highlight the capacity of arguments to guide such inferences. The paper moves beyond Pinto's (2001) discussion by using Boghossian's (Philos Stud 169:1–18, 2014) Taking Condition in service of (i) and (ii) in way that illustrates how epistemically bad arguments can rationally persuade addressees of their conclusions.

     

Beliefs do not come in degrees

Philosophers commonly say that beliefs come in degrees (or that beliefs are graded or that there are partial beliefs). Drawing from the literature, I make precise three arguments for this claim: an argument from degrees of confidence, an argument from degrees of firmness, and an argument from natural language. I show that they all fail. I also advance three arguments that beliefs do not come in degrees: an argument from natural language, an argument from intuition, and an argument from the metaphysics of degrees. On the basis of these arguments, I conclude that beliefs do not come in degrees.     

Roman Catholic Approaches to the Qur'an since Vatican II

Vatican II opposes polemical attitudes to Islam but gives no specific guidance on the Qur'an. Modern Roman Catholic writing on the Qur'an includes a considerable variety of approaches. At the positive end of the spectrum: for Christian members of GRIC (Groupe de Recherche Islamo-Chrétien) the Qur'an is “an authentic Word of God, but one in part essentially different from the one in Jesus Christ”; George Dardess affirms that the Qur'an and the Eucharist are both means through which “God shares with us God's self through the word”; for Giulio Basetti-Sani the Qur'an is divine revelation but it does not contradict Christian doctrine; Jacques Dupuis sees the Qur'an as a real but imperfect revelation. More cautious approaches are found in the writings of Jacques Jomier and Christian Troll, for whom the biblical testimony to Christ is the decisive word of God, and not just one divine revelation alongside another in the Qur'an.     

Dissidence from within: Examining the effects of intergroup context on group members’ reactions to attitudinal opposition

The successful achievement of a group’s goals often requires a broad base of support among members. Because group and individual interests can diverge, however, dissension is likely. We argued that reactions to such dissension on an issue that is relevant to the group’s status can vary as a function of contextual goals. Whereas dissension from an ingroup member would be rejected in an intergroup context, it might be tolerated in an intragroup context. Regression analyses of women’s (N=96) responses to dissension on an attitudinal issue (abortion on demand) indicated that in an intergroup context, women derogated a dissenting woman more if they had a strong gender identity and viewed the issue as gender relevant. Dissent in an intragroup context was evaluated more positively. The results provided insight into the factors involved in defining a collective identity.     

Faith Alone: Reflections on an Adverb

In response to critics of his New Testament translation, Luther points out that they simply do not understand the grammar restrictions of language that requires the addition of the word alone in his translation of Paul's letter to the Romans. Luther also points out that they do not understand that alone in this passage is an adverb and not an adjective. This article explores the significance of the word alone (in “faith alone”) when it is considered an adverb as opposed to an adjective. As an adverb, alone resists attempts to manipulate it into a metaphysical principle. Alone as an adverb keeps faith as a living, dynamic relationship that God established and which comes to expression in the celebration of the sacrament.     

Personal distress and the influence of bystanders on responding to an emergency

Spontaneous helping behavior during an emergency is influenced by the personality of the onlooker and by social situational factors such as the presence of bystanders. Here, we sought to determine the influences of sympathy, an other-oriented response, and personal distress, a self-oriented response, on the effect of bystanders during an emergency. In four experiments, we investigated whether trait levels of sympathy and personal distress predicted responses to an emergency in the presence of bystanders by using behavioral measures and single-pulse transcranial magnetic stimulation. Sympathy and personal distress were expected to be associated with faster responses to an emergency without bystanders present, but only personal distress would predict slower responses to an emergency with bystanders present. The results of a cued reaction time task showed that people who reported higher levels of personal distress and sympathy responded faster to an emergency without bystanders (Exp. 1). In contrast to our predictions, perspective taking but not personal distress was associated with slower reaction times as the number of bystanders increased during an emergency (Exp. 2). However, the decrease in motor corticospinal excitability, a direct physiological measure of action preparation, with the increase in the number of bystanders was solely predicted by personal distress (Exp. 3). Incorporating cognitive load manipulations during the observation of an emergency suggested that personal distress is linked to an effect of bystanders on reflexive responding to an emergency (Exp. 4). Taken together, these results indicate that the presence of bystanders during an emergency reduces action preparation in people with a disposition to experience personal distress.     

Algebraic Semantics for Deductive Systems

The notion of an algebraic semantics of a deductive system was proposed in [3], and a preliminary study was begun. The focus of [3] was the definition and investigation of algebraizable deductive systems, i.e., the deductive systems that possess an equivalent algebraic semantics. The present paper explores the more general property of possessing an algebraic semantics. While a deductive system can have at most one equivalent algebraic semantics, it may have numerous different algebraic semantics. All of these give rise to an algebraic completeness theorem for the deductive system, but their algebraic properties, unlike those of equivalent algebraic semantics, need not reflect the metalogical properties of the deductive system. Many deductive systems that don't have an equivalent algebraic semantics do possess an algebraic semantics; examples of these phenomena are provided. It is shown that all extensions of a deductive system that possesses an algebraic semantics themselves possess an algebraic semantics. Necessary conditions for the existence of an algebraic semantics are given, and an example of a protoalgebraic deductive system that does not have an algebraic semantics is provided. The mono-unary deductive systems possessing an algebraic semantics are characterized. Finally, weak conditions on a deductive system are formulated that guarantee the existence of an algebraic semantics. These conditions are used to show that various classes of non-algebraizable deductive systems of modal logic, relevance logic and linear logic do possess an algebraic semantics.     

An efficient adaptive procedure for psychophysical discrimination experiments

We present an adaptive procedure to conduct psychophysical discrimination experiments. In a discrimination experiment, an observer senses (sees, hears, feels, etc.) two stimuli (separated in space or time) and is asked to order these stimuli with respect to a particular parameter (say,s). Under the usual assumption of a locally linear internal representation ofs, perturbed by additive Gaussian noise, the probabilityP(s ₂)—of judging test stimuluss ₂ “larger” than a reference stimuluss ₁—is an error function (a cumulative normal distribution). Such an error function,Erf [(s ₂μ)/σ], is parametrized by two parameters: μand σ. The parameter μ is the value for whichP(s ₂) = 50% and is related to possible bias effects in the internal representation of the observer. The parameter σ is √2 times the standard deviation of the noise distribution and is generally called thediscrimination threshold. In this paper, we present (1) an algorithm to estimate μ and σ given the data generated by such an observer, (2) an analysis of the efficiency of a stimulus presentation with respect to the estimation of μ and σ , and (3) a method that controls the specific choice of stimulus values during an experiment so that an optimal estimation of μ and σ is obtained.     

Intelligence, Personality and Performance on Case Studies

Standard individual difference antecedents of two stages in the case study assessment process were determined in a sample of 305 students. We found that antecedents to the problem identification and analysis stages of case assessment differed. Specifically, we tested intelligence and personality traits as the predictors and found that openness to experience was significantly positively correlated with an individual’s score on problem identification and that general intelligence was significantly positively correlated with an individual’s score on analysis. Additionally, there was a positive relationship between extraversion and agreeableness and an individual’s analysis score and a significant negative relationship between conscientiousness and an individual’s score on problem identification. Moreover, intelligence and conscientiousness interacted to predict an individual’s analysis score with high conscientiousness partially compensating for an individual’s relatively low intelligence.     

Utility and framing

Standard principles of rational decision assume that an option’s utility is both comprehensive and accessible. These features constrain interpretations of an option’s utility. This essay presents a way of understanding utility and laws of utility. It explains the relation between an option’s utility and its outcome’s utility and argues that an option’s utility is relative to a specification of the option. Utility’s relativity explains how a decision problem’s framing affects an option’s utility and its rationality even for an agent who is cognitively perfect and lacks only empirical information. The essay rewrites standard laws of utility to accommodate relativization to propositions’ specifications. The new laws are generalizations of the standard laws and yield them as special cases.     

The effects of obesity on balance recovery using an ankle strategy

Obesity is associated with an increased risk of falls. The purpose of this study was to investigate the effects of obesity on balance recovery using an ankle strategy. In addition, computer simulations to understand how increased inertia and weight associated with obesity independently influence balance recovery. Ten normal weight (BMI: 22.7 ± 0.6 kg/m²) and ten obese (BMI: 32.2 ± 2.2 kg/m²) adult male subjects participated in the study. Subjects recovered balance using an ankle strategy after three types of postural perturbations: an initial angular displacement, an initial angular velocity from the natural stance, and an initial angular velocity from a prescribed position. Balance recovery was quantified by the largest initial angular displacement or angular velocity from which balance could be recovered. Obesity impaired balance recovery from perturbations involving an initial angular velocity, but not from an initial angular displacement. Similarly, computer simulations determined that increased inertia is beneficial to balance recovery when there is little to no initial angular velocity. These findings indicate that the effects of obesity on balance recovery are dependent on the type of perturbation, and that increased inertia associated with obesity can be beneficial for perturbations that involve little to no initial angular velocity.     

The cognitive representation of an event involving human motion

Human motion is analyzed as a function of the temporal pattern of relative stability and instability of the body in relation to its supporting ground. The cognitive representation of an event unit involving human motion is described as some small number of relatively stable, preparatory motions, followed by an unstable, completing motion. Two experiments tested the coherence of the preparatory motion (s)-completing motion structure, and the visual conditions under which an unstable motion is encoded as the completing motion of an event unit. Preparatory-completing structures were recognized more easily than completing-preparatory structures. The offset of contour motion at the center of an unstable motion was found to be an important variable in the encoding of a completing motion.     

Functions of External Cues in Prospective Memory

Abstract

A simulation of an air traffic control task was the setting for an investigation of the functions of external cues in prospective memory. External cues can support the triggering of an action or memory for the content of the action. We focused on memory for the content, and manipulated the temporal characteristics of the external cue to disentangle two possible functions the cue can support: (1) an external cue visible during a retention interval could support rehearsal of the to-be-performed action; (2) an external cue visible at the end of a retention interval could support retrieval of the to-be-performed action. Two experiments were conducted that converge on the same conclusion: the primary function of an external cue is to support retrieval. Implications for the design of a computer interface to present prospective cues are discussed.     

Bio-inspired cognitive model of motor learning by imitation

Learning, and even more so by imitation, is an essential Cognitive Functions because it is carried out throughout life and allows us to adapt our behaviors from other beings through observation. In this work, we propose a model, and implementation of the cognitive function of imitation motor learning (IML), based on psychological and neuroscientific evidence. According to the evidence, learning by imitation includes imitation of action and imitation of action over an object sub-processes. The imitation of action consists of the movement of the limbs. The imitation of action over an object consists of the interaction with an object within the environment. We achieve an implementation of the proposed model for IML and endow a virtual entity with it. In order to validate the proposal, we use a case study to analyze the sub-processes performance. From results, we conclude that both imitation of action and imitation of action over an object sub-processes play an essential role in getting the agent to interact with stimuli within the environment.     

Age-progressed images may harm recognition of missing children by increasing the number of plausible targets

Age progression, often used to help find missing children, is a technique whereby an outdated photograph of an individual is used to generate an updated image of that individual. Despite its importance, few empirical psychological studies have tested the utility of age progression. The current studies had two purposes: (1) to empirically test the effectiveness of a computerized age-progression system (APRILage); and (2) to examine how the presentation of an age-progressed image changes observers’ decision-making strategies. Presenting participants with an age-progressed image in addition to an outdated image resulted in fewer target recognitions and more mistaken non-target ‘recognitions’ (Study 1; N = 135), led participants to assign fewer confidence points to the actual target and more confidence points to non-targets (Study 2; N = 231), and increased, rather than decreased, the number of plausible targets (Study 3; N = 88). Results are explained within a multidimensional face-space conceptualization of facial recognition.