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From pilot reports, field measurements and numerical simulations, it is known that wake vortices may persist within the glide path in ground proximity, leading to an increased encounter risk. This paper aims to investigate wake vortex behaviour during final approach and landing to understand why landings can be safe nevertheless. Further, it is investigated whether and to which extent the installation of plate lines beyond the runway tails may further accelerate wake vortex decay and thus improve safety by reducing the number of wake vortex encounters.

A hybrid numerical simulation approach is used to investigate vortex evolution from roll-up until final decay during the landing manoeuvre. The simulations are complemented by field measurement data accomplished at Munich Airport and at Special Airport Oberpfaffenhofen.

During touchdown, the so-called end effects trigger pressure disturbances and helical vortex structures that appear to ensure vortex decay rates in ground proximity needed to guarantee the required safety targets of aviation. Light detection and ranging (LIDAR) measurements indicate that vortex decay indeed can be accelerated by a plate line installed on the ground surface. The lifetime of the most safety relevant, long-lived and strongest vortices can be reduced by one-third.

The installation of plate lines beyond the runway tails may improve safety by reducing the number of wake vortex encounters and increase the efficiency of wake vortex advisory systems.

The novel numerical simulation technique and the acquired insights into the wake vortex phenomena occurring during landing as well as the demonstration of the functionality of the patented plate line provide high originality and value for both science and operational application.

In the 1988 film The Accused, a young woman named Sarah Tobias is gang raped on a pinball machine by three men while a crowded bar watches. The rapists cut a deal with the prosecutor. Sarah's outrage at the deal convinces the assistant district attorney to prosecute members of the crowd that cheered on and encouraged the rape. This film shows how Sarah Tobias, a woman with little means and less experience, intuits that according to the law rape victims are incredible witnesses to their own victimization. The film goes on to critique what the “right” kind of witness would be. The Accused, therefore, is also about the relationship between witnessing and testimony, between seeing and the representation of that which was seen. It is about the power and responsibility of being a witness in law – one who sees and credibly attests to the truth of their vision – as it is also about what it means to bear witness to film – what can we know from watching movies.

Engagement, motivation, and persistence are usually associated with positive outcomes. However, too much of it can overtax our psychophysiological system and put it at risk. On the basis of a neuro-dynamic personality and self-regulation model, we explain the neurobehavioral mechanisms presumably underlying engagement and how engagement, when overtaxing the individual, becomes automatically inhibited for reasons of protection. We explain how different intensities and patterns of engagement may relate to personality traits such as Self-directedness, Conscientiousness, Drive for Reward, and Absorption, which we conceive of as functions or strategies of adaptive neurobehavioral systems. We describe how protective inhibitions and personality traits contribute to phenomena such as disengagement and increased effort-sense in chronic fatigue conditions, which often affect professions involving high socio-emotional interactions. By doing so we adduce evidence on hemispheric asymmetry of motivation, neuromodulation by dopamine, self-determination, task engagement, and physiological disengagement. Not least, we discuss educational implications of our model.

The anxiety that usually comes with a speaking performance is said to be both personal and situational. Researchers have over the years sought to understand how the combined effects of personal traits of an individual and situational conditions such as the nature of the speaking environment, the size of the audience and negative perception over the outcome of a speech, affects a person’s ability to effectively communicate. While studies on speech-related anxiety in the academic environment is not new (Basic, 2011; Behnke et al., 2006), the attention of many of these studies has focused on students rather than lectures/instructors. While this study is not the first to focus on the role of lecturers in reducing the incidence of speech anxiety, the purpose of this paper is to stress the role of lecturers in reducing speech-related anxieties and its attendant effects on the academic and professional performances of students. It was found out that most speech-related anxiety is largely situational, rather than personal. The study found that out of fear of being negatively evaluated, students became highly apprehensive when asked to perform a speech-related task in the classroom. This, the study found, can potentially have adverse effects on the academic and professional performance of students. Most importantly, the study established the significant role of lecturers in managing a friendly and pleasant environment that facilitate speaking and positive learning outcomes. As Varron (2011) asserts: “the teacher is the one that facilitates the whole process of leaning and create favorable environment, where there is a smooth flow of communication.”

In total, 40 respondents from the School of Communications of the African University College of Communications were sampled for the study. The selection of only communication students was premised on the study’s quest to unravel the irony inherent in the fact that those communication students that are by their training required to be voluble, tend to be apprehensive, especially under the classroom situation. Doing this was to inevitably help to find out whether or not there is a relationship between an individual’s career choice and the behavioral tendencies such a person is likely to exhibit. Again, the fact that communication students are more competent to speak on issues regarding any subject on communication makes them an ideal choice for this study. A stratified probability sampling method was used to group the sample into various layers (levels). The study using stratified sampling grouped the various respondents into their various levels (strata) and sampled ten respondents from each level. This was to help the study ascertain whether or not any relationship existed between a student’s level and the level of their speaking apprehension. A questionnaire, close and open ended, was employed as the study’s principal instrument for data. Each respondent was given a questionnaire each to respond to. A “descriptive statistical measure was used to describe the characteristics of the sample, whereupon conclusions were generalized for the entire study population.” In addition, graphs, charts, and frequency tabulation made from the coded data were analyzed using the Statistical Package for Social Sciences, after which the corresponding interpretation was assigned. To ensure accuracy, data were coded, entered, and cleaned. Tables and figures from the SPSS helped in making the results of the study easier to interpret and understandable.

The outcome of the administered questionnaire indicated that negative evaluation was caused by lack of adequate preparation, inferiority complex, fear of derision and needless comparisons among students. In respect of how fear of derision causes anxiety, it was found that fear of derision stifles students’ desire to be heard, makes students timid and prevents class participation. On the issue of why some student were deficient in the use of English language, it was found that poor reading habits, overuse of vernacular, obsession with the use of pidgin and apprehension following from the fear of making mistakes were the major causes.

The authors consider the proposed study original both in conceptualisation and design. The main question being interrogated stems from identified gaps in the literature and the study intends to fill these knowledge gaps. The study’s originality stems from the fact that there is paucity of information on the subject of study in the context of Ghana.

The purpose of this paper is twofold. First, the study aims to examine the direct effect of illicit financial flows (IFF) and quality of governance (QoG) on economic growth. Second, this study seeks to examine the moderating effect of QoG on the economic consequences of IFF.

This study collected data from nine The Association of Southeast Asian Nations (ASEAN) countries for the period of 10 years from 2008 to 2019. The study concerned an analysis of the testing of a conceptual framework which based on secondary data which may lack a comprehensive substantiation on the grounds of measurement theory. A partial least squares (PLS) modelling using the SmartPLS 3.2.8 version was used as a statistical tool to examine the measurement and structural model.

Key findings provide empirical support on the effect of IFF and QoG on economic growth. It also confirmed that QoG significantly moderated the relationship between IFF and economic growth by reducing the negative impact of IFF on economic growth.

Immediate corrective action needs to be implemented by policymakers of ASEAN countries to strengthen QoG to effectively curb IFF activities.

This study provides current empirical evidence on the relationship of IFF, QoG and economic growth within ASEAN countries.

This study aims to explore young German consumer perspectives of rental fashion platforms by studying their perceived benefits, potential barriers as well as preferred clothing categories to rent from. This “new” kind of shopping has not yet found great success among young German adults, although there is a substantial margin of growth for this generation.

This qualitative study was conducted through 24 in-depth semi-structured interviews with young female and male German consumers out of Gen Y and Z. The analysis of the data was supported by the software NVivo.

Results indicate that young German consumers value renting clothes for occasions, to frequently change up their wardrobe, out of sustainability aspects and because of efficiency and convenience reasons. However, an entry barrier to the use of rental platforms still persists through a lack of awareness and information, as well as price and high demand issues.

As the interview’s focus group was set to young German consumers, a generalization of the findings to consumers from other countries or out of other generations might be limited.

Managers first need to lower the currently existing entry barrier that prevents many consumers from renting fashion online by raising their awareness and providing them with sufficient information about the platform’s processes as well as their terms and conditions.

This research intends to better understand young German consumers’ attitude toward rental fashion platforms and why renting fashion has not yet achieved more success among them.The results first give managers helpful insights for implementing successful marketing strategies by focusing on spreading awareness among young German adults to stem current entry barriers. Second, these results serve as a basis for future quantitative research that deepens the understanding of the correlation of current findings with other variables (e.g. age, the importance of material possessions in consumers’ lives).

The purpose of this paper is to systematically study the dynamic contact stress, frictional heat and temperature field of femoral head-on-acetabular cup contact pairs in a gait cycle.

In this paper, four common femoral head-on-acetabular cup contact pairs are used as the research objects, mathematical calculations and finite element simulations are adopted. The contact model of hip joint head and acetabular cup was established by finite element simulation to analyze the stress and temperature distribution of the contact interface.

The results show that the contact stress of the head-on-cup interface is inversely proportional to the contact area; high contact stress directly leads to greater frictional heat. However, hip joints with metal-on-polyethylene or ceramic-on-polyethylene paired interfaces have lower frictional heat and show a significant temperature rise in one gait cycle, which may be related to the material properties of the acetabular cup.

Previous studies about calculating the interface frictional heat always ignore the dynamic change process in the contact load and the contact area. This study considered the dynamic changes of the contact stress and area of the femoral head-on-acetabular cup interface, and four common contact pairs were systematically analyzed.

This chapter explores the lessons of the Aral Sea disaster for social learning and for achieving future sustainability in the Aral region. Evident is what might be called “the law of delayed response” which states that social response tends to lag behind deteriorating ecological conditions. The bounding of the Aral Sea problems at various scales of consideration from local to global is explored, with a particular emphasis on the importance of a bioregional approach. Not only is the Aral disaster a global problem, part of the overall climate crisis, but it is also a much replicated disaster, sharing a global but decentralized impact. Proposals address the need for sustainable outcomes in the Aral region.

January 27, 2005, was an extraordinary day for Gillette's James Kilts, the show-stopping turnaround expert known as the “Razor Boss of Boston.” Kilts, along with Proctor & Gamble chairman Alan Lafley, had just orchestrated a $57 billion acquisition of Gillette by P&G. The creation of the world's largest consumer products company would end Kilts's four-year tenure as CEO of Gillette and bring to a close Gillette's 104-year history as an independent corporate titan in the Boston area. The deal also capped a series of courtships between Gillette and other companies that had waxed and waned at various points throughout Kilts's stewardship of Gillette. But almost immediately after the transaction was announced, P&G and Gillette drew criticism from the media and the state of Massachusetts concerning the terms of the sale. Would this merger actually benefit shareholders, or was it principally a wealth creation vehicle for Kilts?

To understand the factors that persuaded shareholders of both P&G and Gillette to merge their companies, the valuation metrics involved in determining the merger consideration, compensation packages for key managers, and the politics (internal, local government, and regulatory) that impact major mergers.

This article examines the early post-World War II civil rights organizing of black women radicals affiliated with the organized left. It details the work of these women in such organizations as the Civil Rights Congress and Freedom newspaper as they fought to challenge the unjust conviction and sentencing of black defendants caught in the racial machinations of U.S. local and state criminal justice systems. These campaigns against what was provocatively called “legal lynching” formed a cornerstone of African American civil rights activism in the early postwar years. In centering the civil rights politics and organizing of these black women radicals, a more detailed picture emerges of the Communist Party-supported anti-legal lynching campaigns. Such a perspective moves beyond a view of civil rights legal activism as solely the work of lawyers, to examining the ways committed activists within the U.S. left, helped to build this legal activism and sustain an important left base in the U.S. during the Cold War.