Precipitate characteristics and selected area diffraction patterns of the β′ and Q′ precipitates in Al–Mg–Si–Cu alloys

In this study, the precipitate characteristics and selected area diffraction patterns (SADP) of the β?′ and Q?′ precipitates formed at the over-aged state of Al–Mg–Si–Cu alloys are systematically investigated by means of high-resolution transmission electron microscopy and transition matrix. The β?′ precipitates have two cross-sections, rectangle-shaped and round-shaped aligned with [0?0?1]_Al direction, but only rectangle-shaped cross-section exists for Q?′ precipitates. And, both of them have 12 variants and orientations with Al matrix. However, there are only three different zone axes, [0?0?0?1]_β?′, [1?4?5?0]_β?′, and [5?4?1?0]_β?′ for β?′ precipitates, and [0?0?0?1]_Q?′, [1?4?5?0]_Q?′, and [3?2 1?0]_Q?′ for Q?′ precipitates, parallel to the [0?0?1]_Al direction when they are precipitated from the Al matrix, respectively. Then, a new [0?0?1]_Al SADP model, which superposes diffraction patterns of the β?′ and Q?′ precipitates, is established. Furthermore, some “cross-shaped” diffraction streaks appeared at over-aged state can be explained reasonably by this model, which is good in agreement with the experimental data.     

Algebraic Functions

Let A be an algebra. We say that the functions f ₁, . . . , f _m : A ⁿ ?? A are algebraic on A provided there is a finite system of term-equalities ${{\bigwedge t_{k}(\overline{x}, \overline{z}) = s_{k}(\overline{x}, \overline{z})}}$ satisfying that for each ${{\overline{a} \in A^{n}}}$ , the m-tuple ${{(f_{1}(\overline{a}), \ldots , f_{m}(\overline{a}))}}$ is the unique solution in A ^m to the system ${{\bigwedge t_{k}(\overline{a}, \overline{z}) = s_{k}(\overline{a}, \overline{z})}}$ . In this work we present a collection of general tools for the study of algebraic functions, and apply them to obtain characterizations for algebraic functions on distributive lattices, Stone algebras, finite abelian groups and vector spaces, among other well known algebraic structures.     

Inversion domain boundary in a ZnO film

Transmission electron microscopy has been used to investigate the (1100) and (1103) inversion domain boundaries in a ZnO film prepared by molecular beam epitaxy. The inversion domain was revealed by dark-field images and confirmed by convergent-beam electron diffraction. Interacting with a (0002) stacking fault, the inversion domain boundary in the (1100) plane alters its orientation from the [0001] direction and climbs on the (1103) plane to release the strain energy. These features are characterized and analysed by high-resolution electron microscopy and the geometric phase method. The findings are significant for understanding the formation and propagation of inverse domain boundaries in epitaxial ZnO films.     

Characterisation of magnesium oxide and its interface with α-Mg in Mg–Al-based alloys

Magnesium oxide (MgO) films and particles have been collected by pressurised filtration of a Mg-8.6wt%Al-0.67wt%Zn (AZ91D) alloy melt. The morphology of the oxides and their interfaces with the α-Mg phase were investigated by high-resolution transmission electron microscopy. It was found that the oxide films consisted of large numbers of sub-micrometre-sized MgO particles, and that melt shearing can effectively break up the oxide films and disperse the oxide particles. For the first time, orientation relationships (ORs) of OR I: [1?1?1]_MgO～2° from (0?0?0?1)_α-Mg and (0?1?1)_MgO?//[2?1?1?0)_α-Mg; and OR II: (1?1?1)_MgO//(1?1?0?1)_α-Mg and [0?1?1]_MgO//[1?2?1?1]_α-Mg, were observed between the MgO particles and the α-Mg matrix. The calculated Bramfitt planar disregistries were 5.5% and 2.5% for the two ORs, respectively, indicating good lattice matching between MgO and α-Mg at the interface. With the evidence of grain refinement effect observed in the sheared AZ91D magnesium alloy, the possibility of MgO particles to act as potent nucleants for heterogeneous nucleation of α-Mg grains is discussed in terms of the crystallographic criterion.     

HREM examination of [101] screw dislocations in Ni3Al

Abstract

The dissociation of [101] screw dislocations in Ni³Al has been examined using high-resolution electron microscopy. [101] superdislocations are found to be dissociated into (a/2)[101] superpartial dislocations on the (010) cube cross-slip plane. These superpartials in turn dissociate into complex stacking faults on the (111) or (111) which are bounded by Shockley partials in agreement with theoretical predictions. The degree of antiphase boundary spreading on (010) was found to increase with deformation temperature while the superpartial core dissociations remain unchanged.     

Cathodoluminescence-mode imaging of dislocations in zinc oxide

Abstract

The cathodoluminescence mode in the scanning electron microscope has been used to image bands of dislocations in zinc oxide. It has been shown that dislocations lying on pyramidal, {1012}, planes are generated beneath indentations on {0001} surfaces. Basal plane dislocations lying parallel to the surface are also observed. Indentations on {1100} prismatic surfaces result in slip on {0001} and {0110} planes.     

Competitive state anxiety and self-confidence: Intensity and direction as relative predictors of performance on a golf putting task

Abstract

This study considered relationships between the intensity and directional aspects of competitive state anxiety as measured by the modified Competitive Sport Anxiety Inventory-2(D) (Jones & Swain, 1992 Jones, G. and Swain, A. B. J. 1992. Intensity and direction as dimensions of competitive state anxiety and relationships with competitiveness. Perceptual and Motor Skills, 74: 467–472. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]) in a sample of 12 experienced male golfers. Anxiety and performance scores from identical putting tasks performed under three different anxiety-manipulated competitive conditions were used to assess both the predictions of Multidimensional Anxiety Theory (MAT; Martens et al., 1990 Martens, R., Burton, D., Vealey, R., Bump, L. and Smith, D. 1990. “The development of the Competitive State Anxiety Inventory-2 (CSAI-2)”. In Competitive anxiety in sport, Edited by: Martens, R., Vealey, R. S. and Burton, D. 117–190. Champaign, IL: Human Kinetics.  [Google Scholar]) and the relative value of intensity and direction in explaining performance variance. A within-subjects regression analysis of the intra-individual data showed partial support for the three MAT hypotheses. Cognitive anxiety intensity demonstrated a negative linear relationship with performance, somatic anxiety intensity showed a curvilinear relationship with performance, and self-confidence intensity revealed a positive linear relation. Cognitive directional anxiety illustrated a positive linear relationship with putting performance. Multiple regression analyses indicated that direction (42% of variance) was a better predictor of performance than intensity (22%)     

Development of the Short Version of the Individuation Test for Emerging Adults (ITEA–S) and Its Measurement Invariance Across Slovene and U.S. Emerging Adults

In this study we developed a short version of the Individuation Test for Emerging Adults (ITEA–S) and tested its measurement invariance across Slovene and U.S. samples of emerging adults. The item reduction process resulted in retaining 21 out of 36 items. The content analysis of the retained and discarded items revealed that the ITEA–S adequately measures the 5 individuation domains (support seeking, connectedness, intrusiveness, self-reliance, and fear of disappointing the parent). In our samples, the ITEA–S demonstrated evidence for construct validity and its 5 scales showed adequate internal consistency. The scale scores were also meaningfully associated with the relevant demographic variables in both countries, as well as the three scales of the Psychological Separation Inventory (Hoffman, 1984 Hoffman, J. A. (1984). Psychological separation of late adolescents from their parents. Journal of Counseling Psychology, 31, 170–178.[Crossref], [Web of Science ®] , [Google Scholar]; the Slovene sample), and the scales of the Differentiation of Self–Revised questionnaire (Skowron &; Schmitt, 2003 Skowron, E. A., &; Schmitt, T. A. (2003). Assessing interpersonal fusion: Reliability and validity of a new DSI Fusion with Others subscale. Journal of Marital and Family Therapy, 29, 209–222.[Crossref], [PubMed], [Web of Science ®] , [Google Scholar]; the U.S. sample). The results of multiple group confirmatory factor analyses supported the hypothesis of full metric and partial scalar invariance for both ITEA–S forms (in relation to mother and father) across the 2 country groups.     

Using MMPI–2–RF Correlates to Elucidate the PCL–R and Its Four Facets in a Sample of Male Forensic Psychiatric Patients

This study documents the associations between the MMPI–2–RF (Ben-Porath &; Tellegen, 2008 Ben-Porath, Y. S., &; Tellegen, A. (2008). MMPI–2–RF (Minnesota Multiphasic Personality Inventory–2–Restructured Form): Manual for administration and scoring. Minneapolis: University of Minnesota Press. [Google Scholar]) scale scores and the Psychopathy Checklist Revised (PCL–R; Hare, 2003 Hare, R. D. (2003). The Hare Psychopathy Checklist–Revised (2nd ed.). Toronto, ON, Canada: Multi-Health Systems. [Google Scholar]) facet scores in a forensic psychiatric sample. Objectives were to determine how the MMPI–2–RF scales might enhance substantive understanding of the nature of the 4 PCL–R facets and to discern possible implications for the treatment of psychopathic patients. A sample of 127 male forensic psychiatric offenders admitted to a Dutch forensic psychiatric hospital completed the PCL–R and the MMPI–2. Exploratory stepwise regression analyses assessed the prediction of the PCL–R total and its facet scores from MMPI–2–RF scales at its 3 hierarchical levels. Conceptually meaningful results emerged at each level of the MMPI–2–RF hierarchy, including several consistent differences between predictor sets across the facets. Interestingly, ideas of persecution (RC6) was a specific predictor of PCL–R Facet 2, a facet noted for its association with treatment failure. Results are compared and contrasted to the extant body of empirical work to date, and some tentative clinical implications are offered.     

What is Nominalistic Mereology?

Hybrid languages are introduced in order to evaluate the strength of “minimal” mereologies with relatively strong frame definability properties. Appealing to a robust form of nominalism, I claim that one investigated language $\mathcal {H}_{\textsf {m}}$ is maximally acceptable for nominalistic mereology. In an extension $\mathcal {H}_{\textsf {gem}}$ of $\mathcal {H}_{\textsf {m}}$ , a modal analog for the classical systems of Leonard and Goodman (J Symb Log 5:45–55, 1940) and Le?niewski (1916) is introduced and shown to be complete with respect to 0-deleted Boolean algebras. We characterize the formulas of first-order logic invariant for $\mathcal {H}_{\textsf {gem}}$ -bisimulations.     

The Effect of Response Bias on the Personality Inventory for DSM–5 (PID–5)

Valid self-report assessment of psychopathology relies on accurate and credible responses to test questions. There are some individuals who, in certain assessment contexts, cannot or choose not to answer in a manner typically representative of their traits or symptoms. This is referred to, most broadly, as test response bias. In this investigation, we explore the effect of response bias on the Personality Inventory for DSM–5 (PID–5; Krueger, Derringer, Markon, Watson, & Skodol, 2013 Krueger, R. F., Derringer, J., Markon, K. E., Watson, D., & Skodol, A. E. (2013). The Personality Inventory for DSM–5 (PID–5)–Adult (Full version). Washington, DC: American Psychiatric Association. [Google Scholar]), a self-report instrument designed to assess the pathological personality traits used to inform diagnosis of the personality disorders in Section III of DSM–5. A set of Minnesota Multiphasic Personality Inventory Restructured Form (MMPI–2–RF; Ben-Porath & Tellegen, 2008 Tellegen, A., & Ben-Porath, Y. S (2008). MMPI–2–RF technical manual. Minneapolis: University of Minnesota Press. [Google Scholar]/2011 Ben-Porath, Y. S., & Tellegen, A. (2011). MMPI–2–RF manual for administration, scoring, and interpretation. Minneapolis: University of Minnesota Press. (Original work published 2008) [Google Scholar]) validity scales, which are used to assess and identify response bias, were employed to identify individuals who engaged in either noncredible overreporting (OR) or underreporting (UR), or who were deemed to be reporting or responding to the items in a “credible” manner—credible responding (CR). A total of 2,022 research participants (1,587 students, 435 psychiatric patients) completed the MMPI–2–RF and PID–5; following protocol screening, these participants were classified into OR, UR, or CR response groups based on MMPI–2–RF validity scale scores. Groups of students and patients in the OR group scored significantly higher on the PID–5 than those students and patients in the CR group, whereas those in the UR group scored significantly lower than those in the CR group. Although future research is needed to explore the effects of response bias on the PID–5, results from this investigation provide initial evidence suggesting that response bias influences scale elevations on this instrument.     

Psychometric Properties and Normative Data of the Zuckerman–Kuhlman Personality Questionnaire in a Psychiatric Outpatient Sample

The Zuckerman–Kuhlman Personality Questionnaire (ZKPQ; Zuckerman, Kuhlman, Joireman, Teta, &; Kraft, 1993 Zuckerman, M., Kuhlman, D. M., Joireman, J., Teta, P., &; Kraft, M. (1993). A comparison of three structural models for personality: The big three, the big five, and the alternative five. Journal of Personality and Social Psychology, 65, 757–768. doi:10.1037/0022-3514.65.4.757[Crossref], [Web of Science ®] , [Google Scholar]) was designed for the assessment of personality. The goal of this work was to determine the psychometric properties of the ZKPQ, as well as to establish normative data by gender and age in an outpatient sample attending primary mental health care services. We administered the questionnaire to 314 participants (34.7% males) 18 to 81 years old. The most prevalent primary diagnoses were mood (37.9%) and adjustment disorders (35.0%). Concerning the psychometric properties of the ZKPQ, the pattern of internal consistencies was similar to that previously found among general population, student, or clinical samples. Regarding gender differences, a general pattern was found, with women scoring higher on neuroticism and sociability, and lower on aggression-hostility. As for age, in general, scores declined with age. Norm-based decision making has the potential for significant and long-lasting consequences, and the quality of decisions based on score comparisons can be improved when scores are compared to norms fitted to the group of reference. The availability of the ZKPQ norms by gender and age in mental health care will benefit the accuracy of assessment and therapeutic decision making, providing more effective treatment planning overall.     

Perfectionism in Argentina and the United States: Measurement Structure,Invariance, and Implications for Depression

The Revised Almost Perfect Scale (APS–R; Slaney, Mobley, Trippi, Ashby, &; Johnson, 1996 Slaney, R. B., Mobley, M., Trippi, J., Ashby, J. S., &; Johnson, D. (1996). Almost Perfect Scale Revised. Psyctests. doi:10.1037/t02161-000[Crossref] , [Google Scholar]) was designed to measure perfectionistic strivings (standards), perfectionistic concerns (discrepancy), and preferences for neatness and organization (order). In this study, English and Spanish (Arana, Keegan, &; Rutsztein, 2009 Arana, F. G., Keegan, E. G., &; Rutsztein, G. (2009). Adaptación de una medida multidimensional de perfeccionismo: la Almost Perfect Scale–Revised (APS–R). Un estudio preliminar sobre sus propiedades psicométricas en una muestra de estudiantes universitarios argentinos [Adaptation of a measure of multidimensional perfectionism: The Almost Perfect Scale–Revised. A preliminary study about its psychometrical properties on a sample of Argentine university students]. Evaluar, 9, 35–53. [Google Scholar]) versions of the APS–R were compared in samples of 283 college students in Argentina and 311 U.S. students. The results offered support for cross-national scalar invariance for discrepancy and order items but standards items, with a few exceptions, raised concerns about their cross-national comparability. Tests of latent means revealed no differences between the countries for discrepancy, but the order factor mean was higher in the U.S. sample. Age and gender had negligible effects on measurement models. Discrepancy was strongly related to depressive symptoms for both samples. Unlike in the U.S. sample, there was a significant association for the Argentina sample between standards and discrepancy. Overall, results indicated that discrepancy items performed well, order items were adequate with some measurement adjustments, and standards items should be revisited for their cross-cultural utility. Translation issues and general values in Argentina and the United States (e.g., collectivism–individualism) are discussed that might affect how perfectionism is understood and measured in different cultural contexts.     

Mapping the MMPI–2–RF Specific Problems Scales Onto Extant Psychopathology Structures

A main objective in developing the Minnesota Multiphasic Personality Inventory–2–Restructured Form (MMPI–2–RF; Ben-Porath &; Tellegen, 2008 Ben-Porath, Y. S., &; Tellegen, A. (2008). MMPI–2–RF (Minnesota Multiphasic Personality Inventory–2 Restructured Form): Manual for administration, scoring, and interpretation. Minneapolis: University of Minnesota Press. [Google Scholar]) was to link the hierarchical structure of the instrument's scales to contemporary psychopathology and personality models for greater enhancement of construct validity. Initial evidence published with the Restructured Clinical scales has indicated promising results in that the higher order structure of these measures maps onto those reported in the extant psychopathology literature. This study focused on evaluating the internal structure of the Specific Problems and Interest scales, which have not yet been examined in this manner. Two large, mixed-gender outpatient and correctional samples were used. Exploratory factor analyses revealed consistent evidence for a 4-factor structure representing somatization, negative affect, externalizing, and social detachment. Convergent and discriminant validity analyses in the outpatient sample yielded a pattern of results consistent with expectations. These findings add further evidence to indicate that the MMPI–2–RF hierarchy of scales map onto extant psychopathology literature, and also add support to the notion that somatization and detachment should be considered important higher order domains in the psychopathology literature.     

Assessment of DSM–5 Section II Personality Disorders With the MMPI–2–RF in a Nonclinical Sample

The Minnesota Multiphasic Personality Inventory–2–Restructured Form (MMPI–2–RF; Ben-Porath &; Tellegen, 2008 Kamphuis, J. H., Arbisi, P. A., Ben-Porath, Y. S., &; McNulty, J. L. (2008). Detecting comorbid Axis-II status among inpatients using the MMPI–2 restructured clinical scales. European Journal of Psychological Assessment, 24, 157–164. doi:10.1027/1015-5759.24.3.157[Crossref], [Web of Science ®] , [Google Scholar]/2011 Ben-Porath, Y. S., &; Tellegen, A. (2011). Minnesota Multiphasic Personality Inventory–2 Restructured Form: Manual for administration, scoring, and interpretation. Minneapolis: University of Minnesota Press. (Original work published 2008) [Google Scholar]) is frequently used in clinical practice. However, there has been a dearth of literature on how well this instrument can assess symptoms associated with personality disorders (PDs). This investigation examined a range of hypothesized MMPI–2–RF scales in predicting PD symptoms. We evaluated these associations in a sample of 397 university students who had been administered the MMPI–2–RF and the Structured Clinical Interview for DSM–IV Axis II Disorders–Personality Questionnaire (First, Gibbon, Spitzer, Williams, &; Benjamin, 1997 First, M. B., Gibbon, M., Spitzer, R. L., Williams, J. B. W., &; Benjamin, L. S. (1997). Structured Clinical Interview for DSM–IV Axis II personality disorders (SCID–II). Washington, DC: American Psychiatric Press. [Google Scholar]). Zero-order correlation analyses and negative binomial regression models indicated that a wide range of MMPI–2–RF scale hypotheses were supported; however, the least support was available for predicting schizoid and obsessive–compulsive PDs. Implications for MMPI–2–RF interpretation and PD diagnosis are discussed.     

Soldiers Lead Themselves to More Success: A Self-Leadership Intervention Study

Neck and Manz (1999) Neck, C. P., & Manz, C. C. (1999). In search of the self-led soldier: Army leadership in the twenty-first century. In J. G. Hunt, G. E. Dodge, & L. Wong (Eds.), Out of the box leadership: Transforming the twenty-first army and other top organizations (pp. 153–176). Stamford, CT: JAI Press. [Google Scholar] elaborated in their article “In Search of the Self-Lead Soldier” on the need for continuous improvement of personnel qualities such as increase in self-efficacy, increase of performance, and decrease of perceived strain. Self-leadership is a tool that fosters exactly these personal resources. This study examines self-leadership training effects on soldiers participating in a military training course over 14 weeks. It is the first self-leadership training study to evaluate performance improvement using objective criteria (examination marks, physical tests) in intervention and control group consisting of soldiers of the Austrian army. Its design features a large sample (N = 130), duration of self-leadership training over 10 weeks, and evaluation over 4 time points. The intervention group accomplished significantly higher educational achievements in examinations and physical tests. Also levels of self-efficacy were significantly higher and levels of strain were marginally to significantly lower.