Developmental stress affects the attractiveness of male song and female choice in the zebra finch (Taeniopygia guttata)

Developmental stress has recently been shown to have adverse effects upon adult male song structure in birds, which may well act as an honest signal of male quality to discriminating females. However, it still remains to be shown if females can discriminate between the songs of stressed and non-stressed males. Here we use a novel experimental design using an active choice paradigm to investigate preferences in captive female zebra finches (Taeniopygia guttata). Nine females were exposed to ten pairs of songs by previously stressed and non-stressed birds that had learned their song from the same tutor. Song pairs differed significantly in terms of song complexity, with songs of stressed males exhibiting lower numbers of syllables and fewer different syllables in a phrase. Song rate and peak frequency did not differ between stressed and non-stressed males. Females showed a significant preference for non-stressed songs in terms of directed perching activity and time spent on perches. Our results therefore indicate that developmental stress affects not only the structure of male song, but that such structural differences are biologically relevant to female mate choice decisions.

The role of physical attractiveness in marketing education: an exploratory study

Recent work on the relationship between class attendance and student performance found that student absenteeism impacted negatively on students’ grade or scores performance (Stanca, 2006). This research aims to examine the relationship between students’ perceived physical attractiveness and lecture attendance. The findings indicated that most students agreed that they will attend the face-to-face lecture more often if the lecturer is ‘funny’. In particular, the male respondents of the study claimed that they would be more likely to attend lecture if the lecturer is ‘attractive’ and ‘good-looking’. Such results may be an indicator that physical attractiveness of the instructor can be one of the motivating factors for students to attend face to face lecture sessions.

Self-perceived sexual attractiveness: differences and contributing factors across gender and sexual orientation

This thesis explored factors associated with feeling sexually attractive among men and women across different sexual orientations. A combination of physical and non-physical traits were found to predict positive self-ratings of sexual attractiveness, and feeling sexy was found to positively contribute to various aspects of an individual’s sexuality.

Reduced-order output feedback controllers for discrete-time systems

This article considers the stabilization by output feedback controllers for discrete-time systems. The controller can place all of the closed-loop poles within a specified disk D(-α, 1/β), centred at (-α,0) with radius 1/β, where | - α|  + 1/β < 1. The design method involves the decomposition of the system into two portions. The first portion comprises of all of the poles that are lying outside of the specified disk. A reduced-order model is constructed for this portion. The second portion comprises of all of the remaining poles of the system and is characterized by an H_∞-norm bound. The controller design is then accomplished by using H_∞-control theory. It is shown that, subject to the solvability of an algebraic Riccati equation, output feedback controllers can be systematically derived. The order of the controller is low, and can be as low as the number of the open-loop poles that are lying outside of the specified disk. A step-by-step design algorithm is provided. Numerical examples are given to illustrate the attractiveness of the design method.

Location dependency and sport sponsors : a factor analytic study

Theories explaining the mechanics of sport sponsorship relationships arc underdeveloped (Gilbert, 1 988; Hock, Gendall, & West, 1990; Pope, 1 998), bolstered by studies lacking systematic methods (Kuzma, Shanklin, & McCall, 1993) and tending toward broad, descriptive, macro-level analysis (Sandler & Shani, 1993). This paper attempts to redress this empirical chasm in a small way by examining an element of the sponsorship relationship. Specifically this paper explores the importance of one particular mode of sponsorship delivery: the location of a venue containing sponsor affiliations or what has been named location dependency. Location dependency of sport sponsors has been shown to be a pivotal determinant when devising sponsorship proposals or when assessing the attractiveness of a sponsorship opportunity (Wester- beek, 2000). Factor analysis was used to determine if sponsors' response patterns would deliver a number of constructs that could be related to the concept of location dependency. Factor analysis revealed five factors that principally reinforced the notion of location dependency of sponsorship. T-tests delivered significant differences between location dependent and location independent sponsors on some of the factors. The results of this study suggest that appreciating the concept of location dependency may assist companies in the effective discharge of their sponsorship decisions.

Body image ideal among males and females: sociocultural influences and focus on different body parts

Past research has obtained mixed findings in relation to gender differences and other factors that shape ideal body image. The current study was designed to investigate these differences further, using a digital body image program to assess body image individually. As expected, females desired a body that was smaller than their current size, whereas males were split between wanting a smaller and larger body. The perceived messages from peers and parents were consistent with the individual's ideal image. Gender differences were also found with ratings of attractiveness and effectiveness. Females rated messages from peers and parents as more important than did males. For both males and females, opposite sex peers were the most important influences, and parents the least important.

Development and validation of the physical disability sexual and body esteem scale

The Physical Disability Sexual and Body Esteem (PDSBE) scale was developed to assess respondents' capacity to feel positive about their sexuality and their body while living with a physical impairment. The current paper presents four studies that were conducted to develop and assess the psychometric properties of the 10 item PDSBE scale. The first study was an exploratory factor analysis involving 348 participants with physical disabilities. The factors were: Sexual Esteem, Attractiveness to Others, and Body Esteem. The second study was a confirmatory factor analysis, with a total of 338 participants. This analysis confirmed the factor structure established in study 1. The third study revealed good test-retest reliability on a total of 47 participants with physical disabilities. The final study was conducted with 748 participants with physical disabilities and showed that the PDSBE had high reliability and good convergent and divergent validity. Mean scores showed that women scored significantly higher than men on the total PDSBE scale and on the Sexual Esteem and Attractiveness to Others subscales. Future applications for the PDSBE scale are discussed.

Design of reduced-order functional observers for linear systems with unknown inputs

This brief paper presents new conditions for the existence and design of reduced-order linear functional state observers for linear systems with unknown inputs. Systematic procedures for the synthesis of reduced-order functional observers are given. Numerical examples are given to illustrate the attractiveness and simplicity of the new design procedures.

Relationship between men's and women's body image and their psychological, social, and sexual functioning

This study was designed to examine the relationships between different aspects of body image and psychological, social, and sexual functioning throughout adulthood. The respondents were 211 men and 226 women (age range 18–86 years; mean = 42.26). Respondents completed measures of self-rated attractiveness, body satisfaction, body image importance, body image behaviors, appearance comparison, social physique anxiety, self-esteem, depression, anxiety, and social and sexual functioning. Body image was associated with self-esteem for all groups, but was unrelated to other aspects of psychological, social, and sexual functioning. There were some exceptions; a disturbance in body image was related to problematic social and sexual functioning among middle-aged men and to depression and anxiety symptoms in late adulthood among men and women. Middle-aged men who presented with the type of body image disturbance typical of women were more likely to have impaired interpersonal functioning. These results demonstrate that social aspects of body image appear to be important in understanding psychological functioning in later life.

Adolescent body image and psychosocial functioning

Researchers have highlighted the significance of a poor body image in the development of dysfunctional eating but have systematically investigated few other outcomes. The authors examined the relationships between different aspects of body image and psychosocial functioning. Participants were 245 boys and 173 girls from Grades 8 and 9 (M age = 13.92 years, SD = 0.69 years). Respondents completed measures of physical attractiveness, body satisfaction, body image importance, body image behaviors, appearance comparison, social physique anxiety, self-esteem, depression, anxiety, and same-sex and opposite-sex relations. Whereas girls tended to report a more negative body image than did boys, the relevance of body image to self-esteem was similar for boys and girls. Concern about others' evaluation of their bodies was especially important in understanding low female self-esteem, whereas for boys, ratings of general attractiveness most strongly predicted self-esteem. The authors found a negative body image to be unrelated to symptoms of negative affect but to be strongly associated with poor opposite-sex peer relationships, especially among boys. A negative body image also affected same-sex relations among girls.

Design of scalar functional observers of order less than (v-1)

This paper presents a new method of designing scalar functional observers of order less than the well-known upper bound (ν - 1). A condition for the existence of observers of order p where 1 ≤ p ≤ (ν - 1) is given. A simple and effective algorithm for solving the constrained generalized Sylvester equation is proposed. Several numerical examples are given to illustrate the attractiveness of the design algorithm.

Postgraduate international students from Asia: factors influencing satisfaction

The growth in the international education market within the next two decades will be dominated by Asia, accounting for almost 70% of the global demand for international higher education (Bohm et al., 2002). The market attractiveness with significant pecuniary and non-pecuniary gains from full-fee paying students will result in a more competitive environment for higher educational institutions around the world seeking to improve their market position. Student satisfaction is a key strategic variable in maintaining such a competitive position with long-term benefits arising from student loyalty, positive word of mouth (WOM) communication and image of the higher educational institutions to meet the challenges of increasing global competition, rising student expectations of quality, service, and value for money. This process requires educational institutions to carefully analyse these key factors contributing to student satisfaction and therefore develop strategies accordingly.

Using logistic regression analysis with factor scores and aggregated satisfaction scores, this study examines the relative importance of factors and their impact on the satisfaction levels of international postgraduate students from four Asian countries studying in Australian universities. The study concludes that the dominant factors that impact on student satisfaction are quality of education, student facilities, reputation of the institutions, the marketability of their degrees for better career prospects, and the overall customer value provided by the universities.