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Sleep disturbances, present in more than 90% of major depressive disorder (MDD) patients, are moderated by sex in adult MDD. In particular, slow-wave electroencephalographic activity (SWA; 0.5-4 Hz) accumulation is low and dissipation impaired. This SWA abnormality in depressed adult males does not change with age, suggesting that SWA abnormality appears at early ages. The present study evaluated sex differences in SWA in adolescents with MDD compared to healthy controls. We evaluated regularized sleep-wake schedules at home for 5-7 days, followed by two consecutive nights of sleep EEG recording. The study included 104 participants, 52 symptomatic and depressed subjects (MDD: 20 males and 32 females) and 52 healthy controls (HC: 20 males and 32 females), aged 13-18 years. SWA power and dissipation, and duration and latencies to each Non-Rapid Eye Movement (NREM) sleep period were calculated for each group. Results showed that SWA accumulation in the first NREM period was lower and its dissipation across the night more irregular in MDD males compared to HC males (P<0.009). By contrast, SWA was equivalent in MDD and HC females. In conclusion, as reported in adult MDD, the accumulation and dissipation of SWA was abnormal in depressed adolescents, but only in males. SWA abnormalities in adolescent MDD may relate to different depressive symptoms in females and males. These results underscore the need to develop sex-specific therapies to enhance and restore SWA in depressed adolescents.

Economic diplomacy refers to methods and processes by which states take advantage of cross-border economic activities to achieve their national interests. It makes connections between the sphere of corporate players, who export or invest abroad, and the sphere of diplomats, who represent the state on the international scene and implement geopolitical decisions. The main purpose of this paper is to provide an overall and coherent framework for asking, classifying and discussing the main issues raised by economic diplomacy. It investigates concepts such as national interest, power and influence. It surveys the relevant literature and deals with various expressions of economic diplomacy such as export promotion agencies, economic role of embassies and consulates, or international economic sanctions. It analyzes the two-way relationship between international economics and international politics, which is at the core of economic diplomacy, and tries to answer the following questions: on the global scene, is diplomacy just accompanying the economy? Is diplomacy driving the economy?

The transition to omnichannel retail is the recognized future of retail, which uses digital technologies (e.g. augmented reality shopping assistants) to enhance the customer shopping experience. However, retailers struggle with the implementation of such technologies in brick-and-mortar stores. Against this background, the present study investigates the impact of a smartphone-based augmented reality shopping assistant application, which uses personalized recommendations and explainable artificial intelligence features on customer shopping experiences.

The authors follow a design science research approach to develop a shopping assistant application artifact, evaluated by means of an online experiment (n = 252), providing both qualitative and quantitative data.

Results indicate a positive impact of the augmented reality shopping assistant application on customers' perception of brick-and-mortar shopping experiences. Based on the empirical insights this study also identifies possible improvements of the artifact.

This study's assessment is limited to an online evaluation approach. Therefore, future studies should test actual usage of the technology in brick-and-mortar stores. Contrary to the suggestions of established theories (i.e. technology acceptance model, uses and gratification theory), this study shows that an increase of shopping experience does not always convert into an increase in the intention to purchase or to visit a brick-and-mortar store. Additionally, this study provides novel design principles and ideas for crafting augmented reality shopping assistant applications that can be used by future researchers to create advanced versions of such applications.

This paper demonstrates that a shopping assistant artifact provides a good opportunity to enhance users' shopping experience on their path-to-purchase, as it can support customers by providing rich information (e.g. explainable recommendations) for decision-making along the customer shopping journey.

This paper shows that smartphone-based augmented reality shopping assistant applications have the potential to increase the competitive power of brick-and-mortar retailers.

The lack of critical thinking in new graduates has been a concern to the nursing profession. The purpose of this study was to investigate the effects of an innovative, evidence-based skills fair intervention on nursing students' achievements and perceptions of critical thinking skills development.

The explanatory sequential mixed-methods design was employed for this study.

The findings indicated participants perceived the intervention as a strategy for developing critical thinking.

The study provides educators helpful information in planning their own teaching practice in educating students.

This study evaluates the mediating role of social media entertainment on social information (content) and social media performance, during the COVID-19 era.

Primary data were randomly gathered from 373 students from two top universities (public and private) in Ghana, a sub-Saharan African economy. Data analysis was achieved utilizing the partial least square–structural equation model (PLS-SEM).

Social media (SM) entertainment partly mediates the link between social media content and social media performance of students, suggesting that social media entertainment is almost indispensable in creating social media content to achieve optimum performance among tertiary students.

The use of cross-sectional data alone for this study does not give us the opportunity to observe the social media activities of respondents over a longer period. Future studies could, therefore, include longitudinal data.

The findings in this study suggest that faculties can modify their pedagogical activities to include social media and reflect some entertainment content, since it has an influence on student performance within the social media space.

SM has a great influence on students' performance socially and academically; therefore, educational stakeholders like university authorities, faculties, parents and guardians, and the government should consider social media as a tool for attaining educational goals.

The study extends the use of UTAUT2, in understanding students' learning and behavior processes, by linking antecedents of adoption to the post-adoption effect.

The aim of this paper is to explore the evolving nature of the work of cabin crew in a Scandinavian carrier in three eras, drawing on theories of gender and emotional labour.

The paper draws on ethnographic data from fieldwork, interviews and documents.

From being a feminized and temporary occupation for young, upper- and middle-class women in the 1970s, the occupation became a full-time job and with greater diversity of cabin crew. Today there are signs of the job becoming a precarious and temporary one of demanding and devalorized work in a polarized and class-divided labour market. Changing circumstances impact on the emotional labour requirement and terms and conditions at work.

A limitation is that the research design was not initially longitudinal in the sense that the author does not have exactly the same kind of data from each era. The author has, however, been involved in this field for two decades, used multiple methods and interacted with different stakeholders and drew on a unique data material.

The development in aviation is contributing to new discriminatory practices, driving employee conditions downwards and changing the job demands. This development will have practical consequences for the lives and families of cabin crew.

The analysis illustrates how work ‘constructs' workers and contributes in creating jobs that are not sustainable for the employees. Intensification of work, insecurity and tougher working conditions also challenge key features in the Nordic model such as proper pay, decent work and a life-long employment. Much indicates that the profession is again becoming a temporary one of demanding work with poor working conditions in a polarized and class-divided labour market.

The research contributes to the literature on emotional labour, gender and the evolving nature of the work of cabin crew. The unique data material, the longitudinal aspect of the research and the focus on a single network carrier are good in charting changes over time.

The aims of this study were to evaluate fitness levels in a cohort of police trainees and compare these results to other police trainees and the general population.

Retrospective data for 274 male and 152 female police trainees were supplied. Measures included height, body mass and physical appraisal test (PAT; 2.4 km run, vertical jump, push-ups and grip strength) results, assessed twice, prior to commencement of training, separated by several months. Wilcoxon signed rank tests were used to analyze non-parametric initial and final PAT scores and Mann–Whiney U tests were used to determine variance between groups.

Male trainees were significantly quicker in the run (−12%, p < 0.001), completed more push-ups (+74%, p < 0.001) with greater grip strength (+52% left and +50% right, p < 0.001) when compared to female trainees. Following the second PAT assessment, the significant differences between male and female trainees remained (p < 0.001). Only female trainee 2.4 km run times improved significantly between initial and final PAT (−4%, p = 0.002).

When compared to the general population from which they were drawn and to other law enforcement trainees, the police trainees in this study were quicker, more powerful and stronger. While there was no loss of fitness between initial and final PAT performance, a conditioning program, spanning the periods between initial and final PAT may be of benefit to increase fitness prior to training commencement especially for female trainees who were generally less fit than, yet must complete the same training as, male trainees.

Since it is difficult for researchers to access data for the North Korean economy, they typically choose a proxy economy for estimating the economic impact of the unification of the two Koreas using a computational general equilibrium (CGE). This paper aims to identify the best proxy economy for North Korea out of the 140 economies (countries) in the Global Trade Analysis Project (GTAP) database version 9.1, which was published in mid-2015. (Ed- if your study aim is ‘to identify the best proxy economy for North Korea’, then you must state your study finding here in the abstract, and also in the conclusion, i.e., Romania) This paper evaluates the input-output (IO) tables for the North Korean economy in existing studies. Comparing the coefficients for North Korea in existing studies with those of the countries selected for this paper, substantial differences were found, especially for the services sector. This casts some doubt on the IO tables in the existing studies on the North Korean economy.

This study analyzes the policy initiatives that have been adopted by the US government since the 1930s. We document the institutional bodies responsible for the implementation of trade policy, as well as the objectives and decision making practices that are associated with policy formation. We also examine the new institutional movement of the Trump Administration’s neo-protectionist “America First” trade policy and its potential impact on the Asian region. Finally, our study examines the recent renegotiation of Korea-US FTA from a perspective of each country’s internal decision making process and discusses a number of issues that have relevant applications for Korea. The results from our analysis show that U.S trade policy show that despite a long period of an open and liberalized trade policy focus, recent neo-protectionist measures by President Trump could lead to potential trade wars and a return to the beggar-thy-neighbor policies of the 1930s. Such an anti-globalization agenda could have dire consequences for export dependent countries in the Asian region.