Effect of electron concentration on the Laves phase stability of NbCr2–Ni produced by powder metallurgy

The powder metallurgy technology of mechanical alloying followed by hot-pressing consolidation has been used to obtain NbCr₂–Ni Laves phases. High-purity Nb, Cr, and Ni crystalline powders were milled for periods up to 35 h. These powders were vacuum sintered at 1250°C for 0.5 h under 45 MPa. The phase transformations of NbCr₂–Ni Laves phases have been investigated by X-ray diffraction. The grain size decreases and the microstrain increases with increased Ni content. Different phase transformations were observed from NbCr₂–Ni intermetallics. It is found that the electron concentration and phase stability correlation is obeyed in the Nb–Cr–Ni systems. However, the electron concentration corresponding to the C15/C14 phase transition is found to move to a higher value (i.e. 6.103) than the predicted one (i.e. 5.88) in the literature.     

Bias in Estimation of Misclassification Rates

When a simple random sample of size n is employed to establish a classification rule for prediction of a polytomous variable by an independent variable, the best achievable rate of misclassification is higher than the corresponding best achievable rate if the conditional probability distribution is known for the predicted variable given the independent variable. In typical cases, this increased misclassification rate due to sampling is remarkably small relative to other increases in expected measures of prediction accuracy due to samplings that are typically encountered in statistical analysis. This issue is particularly striking if a polytomous variable predicts a polytomous variable, for the excess misclassification rate due to estimation approaches 0 at an exponential rate as n increases. Even with a continuous real predictor and with simple nonparametric methods, it is typically not difficult to achieve an excess misclassification rate on the order of n ⁻¹. Although reduced excess error is normally desirable, it may reasonably be argued that, in the case of classification, the reduction in bias is related to a more fundamental lack of sensitivity of misclassification error to the quality of the prediction. This lack of sensitivity is not an issue if criteria based on probability prediction such as logarithmic penalty or least squares are employed, but the latter measures typically involve more substantial issues of bias. With polytomous predictors, excess expected errors due to sampling are typically of order n ⁻¹. For a continuous real predictor, the increase in expected error is typically of order n ^−2/3     

Experiential Marketing and Marketing Experience: An Empirical Study of the Influence of Summer Boot Camp on Military Propensity

The purpose of this study was to examine how experiential marketing may influence military propensity via the Summer Boot Camp (SBC), a 5-day quasi–training camp for high school and college students run by the Taiwan military. A survey of 1,102 participants was conducted using questionnaires. The findings indicate that a satisfactory SBC experience leads to a higher degree of perceived experiential value, which in turn triggers favorable behavioral intentions regarding the military in terms of supporting national defense, recommending the SBC to relatives and friends, and visiting regional recruiting centers. Further, perceived experiential value plays an important mediator role for experiencing a military propensity by exerting a significant indirect influence. However, the influence resulting from a good experience and value is not sufficient to motivate participants to actually go to enlist. Implications for recruiting efforts are discussed in terms of designing effective experience marketing.     

2. Freud's 'id' and Jung's 'self' as aids in self-analysis

The id and the self are described as constructs of our unconscious which can be deployed in describing the analytic process. They can be used like the x in mathematics or the joker in a pack of cards as fitting in almost anywhere. But we can call on them as important aids to concentration, when additional room is made for meditating on the past which then comes to life again. They are useful for analysing ourselves and others. In this way the id as well as the self become aide-mémoires. The analysis of the repressed by means of the transference is not the only road to hitherto unconscious memories. This kind of meditation has helped me despite all reservations to undertake self-analysis and to write an autobiography. I maintain that one can have a transference to oneself. It is, of course, narcissistic. But then, no one can write an autobiography without a healthy dose of narcissism.     

Individual temporal differences in precompetition anxiety and hormonal concentration

This investigation explored individual differences in hormonal concentration and directional perception of anxiety 24hrs, 2hrs and 1 hr before an important competition. Those who perceived their anxiety level as positive to performance (i.e. facilitators) showed an increase in testosterone concentration as time-to-event approached that contrasted markedly with those who perceived their anxiety intensity as negative to performance (i.e. debilitators). The facilitatory group also exhibited a lower cortisol response 2 hrs and 1 hr, relative to 24 hrs before the event, whilst the response of the debilitatory group was elevated as time-to-event approached. Finally, the facilitatory group evidenced a trend towards rapid elevations in all of the catecholamines, whilst the concentration amongst the debilitatory group remained stable as the event approached. The findings add further substance to the veracity of the directional construct in acting as the important distinguishing variable which accounts for significant individual differences. Additionally it addresses the mechanism by which the relationship between anxiety direction and performance may be brought about. Such underpinning biochemical mechanisms offer one possible yet long awaited explanation to aid our understanding of the pre-event anxiety direction response of competitive individuals.     

Pentobarbital self-administration in rhesus monkeys: drug concentration and fixed-ratio size interactions.

Performances of three rhesus monkeys were reinforced by the oral delivery of pentobarbital and studied as functions of fixed-ratio size and drug concentration. Pentobarbital solutions and water were concurrently available on identical reinforcement schedules from separate liquid-delivery systems during 3-hour sessions. Under a fixed-ratio 16 schedule of drug availability, a descending series of drug concentrations was tested (4, 2, 1, 0.5, 0.25, 0.125, and 0.0625 mg/ml, followed by a retest at 4 mg/ml). Partial concentration series beginning with the highest concentration were repeated with fixed-ratios of 32 and 64, with a fixed-ratio 128 for two monkeys, and with fixed-ratio 256 for one. At each fixed-ratio value, response rate and number of drug deliveries were inverted U-shaped functions of pentobarbital concentration. Drug intake (mg/kg/session) increased directly with drug concentration. As the fixed-ratio size was increased, the number of liquid deliveries decreased. For each drug concentration, when the numbers of drug deliveries at fixed-ratios of 32, 64, and 128 responses were plotted as percentages of those obtained at fixed-ratio 16, the following orderly relationship emerged: the higher the drug concentration, the less that drug deliveries were decreased by increases in fixed-ratio size. This relationship indicates an increase in reinforcing efficacy with increases in pentobarbital concentration.     

Mixed‐methods Evaluation of the Good Behaviour Game in English Primary Schools

Inclusivity of all children in education and within educational settings is an important value and goal. Yet, where settings and practices are not oriented for inclusivity and engagement, some children can struggle with academic tasks and are often marginalised and exhibit disruptive behaviours. The study reported here addresses the social nature of school as a community for learning through a mixed‐methods concurrent triangulation evaluation of the implementation of the Good Behaviour Game (GBG) in six primary (elementary) schools with 10 classes and 222 children in Oxfordshire, England. The Teacher Observation of Classroom Adaptations ‐ Revised (TOCA‐R) was administered in individual interviews with class teachers. Additionally, individual semi‐structured interviews were conducted with teachers, coaches and head teachers (n = 22). In a pre–post design, improvements in child adaptation were observed on all TOCA‐R subscales. In an integrative analysis that brought together quantitative and qualitative findings, pupil improvement was identified in three major areas: inclusion and social participation, behaviour, and concentration. Interview results also highlighted the substantial practical challenges associated with implementing and using the GBG in schools in the UK. Overall, the results of this study support the idea that social relationships within the school community, between pupils and between pupils and teachers, provide an important context for learning and social development. Copyright © 2016 John Wiley & Sons, Ltd.     

Magnitude of trauma and personality change

In this paper the author postulates that, in post-traumatic personality structures caused by overwhelming traumatic experiences, pre-traumatic personality features and childhood experiences are of little or no relevance. Sixty-four survivors of Nazi concentration camps are examined, their concentration camp experiences detailed and pre-persecution histories and post-persecution psychopathology studied. The significance of a concentration camp experience is analytically discussed and evaluated. This study shows that 52 cases (81.2%) of the 64 survivors of concentration camps presented an almost identical depressive personality structure irrespective of their prepersecution life history. The 64 survivors of concentration camps are psychologically compared to 78 cases of people who, in view of the menacing circumstances, decided to emigrate and in this way were spared from becoming victims of the Nazi 'final solution'. Finally, the author discusses the value of psychoanalytical treatment.     

Summer Camp Program for Children With Obsessive–Compulsive Disorder: Description and Preliminary Observations

Summer camp programming has a rich history of promoting childhood development. In the care of children with specific childhood psychiatric disorders, the incorporation of targeted cognitive-behavioral principles provides an opportunity to marry targeted evidence-based practices with broader development, in particular social, emotional, and fine- and gross-motor development. This union is synergistic, providing the practitioner with an opportunity to employ cognitive-behavioral practices in an environment that may overcome common barriers to effective interventions outside the scope of the targeted illness. In this paper, the authors describe the preliminary findings concerning a weeklong, 25-hour summer camp program targeting childhood obsessive–compulsive disorder (OCD). Nine children ages 9–12 years participated in this pilot program. Child and parent feedback alike suggested strong treatment acceptability and efficacy in targeting both core symptoms of OCD as well as associated developmental deficits. The camp’s implementation of exposure and response prevention enables an opportunity to report on the capability of employing these strategies in a summer camp setting. In conjunction with an evidence-based treatment program for childhood OCD, a summer camp program specifically targeted for children with OCD presents a valuable tool for improving child welfare and reducing functional impairments.