We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.
To save content items to your account,
please confirm that you agree to abide by our usage policies.
If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account.
Find out more about saving content to .
To save content items to your Kindle, first ensure no-reply@cambridge.org
is added to your Approved Personal Document E-mail List under your Personal Document Settings
on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part
of your Kindle email address below.
Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi.
‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Children, who are particularly vulnerable in emergency situations, need tailored mental health strategies.
Objectives
We investigated the impact of the COVID-19 pandemic on anger and life satisfaction in children.
Methods
September 2021, we conducted a cross-sectional study in Preveza, Greece, interviewing 91 students aged 10-12 years from four elementary schools. The survey included socio-demographic questions, the Anger Expression Scale for Children (AESC), and the Satisfaction with Life Scale (SWLS). AESC scores range from 6 to 30 indicating anger severity, while SWLS scores between 5-9 signify extreme dissatisfaction and 31-35 extreme satisfaction.
Results
Significant correlations were found between the number of siblings (p 0.004), duration of electronic play (p 0.005), and duration of sleep (p 0.014) with life satisfaction. Children without siblings, with limited play consumption, and early bedtimes had lower life satisfaction. The presence of a television in their room (p 0.027) and daily use of television and social media (p 0.007) correlated with anger management and behavior. Social media/TV use was associated with better anger management.
Conclusions
Despite the pandemic lasting almost two years, children’s anger levels in Preveza remained stable, possibly due to outdoor activities and online interactions. These findings provide insights for policy makers, healthcare professionals, and parents seeking to improve anger management of children.
Understanding coronophobia, or the heightened fear and anxiety related to the COVID-19 pandemic, involves assessing physiological, cognitive, and behavioral measures.
Objectives
We aimed to develop a Greek version of the Coronavirus Anxiety Scale (CAS), the Obsession with COVID-19 Scale (OCS), and the Coronavirus Reassurance-Seeking Behaviors Scale (CRBS), to identify groups that appear vulnerable to this form of pandemic-related anxiety.
Methods
We conducted a cross-sectional online study from February to April 2021 in Greek-speaking people living in Cyprus. Participants completed sociodemographic questions and questions related to COVID-19, the CAS, OCS, and the CRBS. All three scales are rated on a 5-point scale, from 0 (not at all) to 4 (nearly every day). For CAS, a score ≥ 9 indicates probable dysfunctional coronavirus-related anxiety, for OCS a ≥ 7 score indicates probable dysfunctional thinking about COVID-19, and for CRBS score ≥ 12 suggests above-average reassurance-seeking activity.
Results
A total of 405 adults (66.4% women) from Cyprus participated in this study. The results of this study demonstrate that these Greek adapted measures have adequate reliability (Cronbach’s alphas >0.70) and factor structure (exploratory and confirmatory factor analysis support). However, only the CAS demonstrated both convergent and divergent validity. Education personnel, housekeepers, and older adults were also found to have higher coronavirus anxiety relative to their counterparts.
Conclusions
The findings of this research support the use of these coronaphobia scales in Cyprus and other Greek-speaking populations. Assessing the potential for fear-driven behaviors may be of great benefit to both clinicians and researchers, helping to identify individuals at risk, adapt interventions, and improve our understanding of the psychological consequences of surviving a public health emergency.
The COVID-19 pandemic has highlighted a need for engaging online resources to enrich psychiatry training for undergraduate medical students. Podcasting is a well-established digital communication platform utilised daily in a myriad of capacities, including education. A group of medical students were tasked with creating their own educational podcasts covering specific aspects of psychiatry.
Objectives
Each pair was set a sub-topic of psychiatry and utilised software to produce educational resources. The objective of this project was to reflect upon production as well as explore the efficacy of podcasting as a tool within undergraduate training.
Methods
The medical students conducted research and contacted experts within the field to contribute to their podcasts. The majority of the students then conducted reviews of the literature surrounding podcasting within medical education, which informed the production of their own podcasts. From this, it was discussed how this project could impact future practice, and indicated that podcasts may become crucial asynchronous learning tools in medical education.
Results
Literature review and first-hand experience of podcast production enabled the students to appreciate the advantages of podcasting and the potential for its widespread future applications. Their wider reading revealed that podcast-using study participants outperformed or matched their peers in assessments, and overwhelmingly enjoyed using podcasts over traditional teaching methods.
Conclusions
The use of podcasting can complement traditional psychiatry training and appeal to a generation of digital natives that prefer this learning style. Podcast production is also an excellent revision method, highlighting the advantages of peer-to-peer education in both learning and increasing engagement with psychiatry.
The core workplace for a surgeon is the operating theatre. Secondary duties may include visits to small health centers for outpatient examinations and visitor work to psychiatric hospitals.
Objective
The objective of our study is to highlight the mistakes of management that lead to half-empty provincial health centers and psychiatric hospitals.
Methods
Presentation of the 2-year-experience of a surgeon visitor in provincial health centers and in a large psychiatric hospital in Greece.
Results
The provincial health center of Lagada needs at least 4 surgeons to serve; too many patients to be examined or/and operated in 2–3 hours only. Subsequently problems arise, as simultaneously in the emergencies department a surgical eye for an abdominal pain or a bad looking leg is needed every 15 minutes. The health center of Koufalia needs 3 hours of driving per day for 3–8 surgical patients only. The psychiatric hospital offered work for 3 surgeons 5 days a week for a long period of time. During 2012–2014, only one surgeon visited the hospital once a week. The work needed to be done may kill the surgeon or force him to receive antidepressants in order to keep his functions alive.
Conclusions
Not a hint of scientific motivation for two years is a strong reason for a surgeon to avoid the duty to provincial health centers and psychiatric hospitals which is obligatory according to our national health system Laws until two years are completed for newly appointed surgeons. Managers might encourage surgeons if some balancing convenience was offered.
Disclosure of interest
The authors have not supplied their declaration of competing interest.
By
S. Loyka, School of Electrical Engineering and Computer Science, University of Ottawa,
C. D. Charalambous, Department of Electrical and Computer Engineering, University of Cyprus
Secrecy rate maximization in Gaussian MIMO wiretap channels is considered. While the optimality of Gaussian signaling and a general expression for the secrecy capacity have been well established, closed-form solutions for the optimal transmit covariance matrix are known for some special cases only, while the general case remains an open problem. This chapter reviews known closed-form solutions and presents a numerical algorithm for the general case with guaranteed convergence to the global optimum. The known solutions include full-rank and rank-1 cases (which, when combined, provide a complete solution for the case of two transmit antennas), the case of identical right singular vectors for the eavesdropper and legitimate channels, and the cases of weak, isotropic, and omnidirectional eavesdroppers, which also provide lower and upper bounds to the general case. Necessary optimality conditions and a tight upper bound for the rank of the optimal covariance matrix in the general case are discussed. Sufficient and necessary conditions for the optimality of three popular signaling strategies over MIMO channels, namely, isotropic and zero-forcing signaling as well as water-filling over the legitimate channel eigenmodes, are presented. The chapter closes with a detailed description of a numerical globally convergent algorithm to solve the general case, and gives some illustrative examples.
Introduction
Due to their high spectral efficiency, wireless MIMO (multiple input, multiple output) systems are widely adopted by academia and industry. The broadcast nature of wireless channels stimulated significant interest in their security aspects and the Gaussian MIMO wiretap channel (WTC) has emerged as a popular model to study information theoretic secrecy aspects of wireless systems [1]. A number of results have been obtained for this model, including the proof of optimality of Gaussian signaling [1–4], which is far from trivial and significantly more involved than that of the regular (no wiretap) MIMO channel. Once the functional form of the optimal input is established, the only unknown is its covariance matrix since the mean is always zero. This latter part has not been solved yet in the general case; only a number of special cases have been settled.
In the Esmeraldas focus of onchocerciasis in Ecuador, the larvae of the primary vector Simulium exiguum Roubaud are found in sympatry with the non-vector S. gonzalezi Vargas & Díaz Nájera. Distinguishing the pre-ultimate stage larvae of these two species usually relies on the pattern of markings on the cephalic apotome. These patterns appear either as dark spots against a pale cuticle (positive head pattern) or as pale spots within a darkened area of the cuticle (negative head pattern). Larvae of S. exiguum s.l. usually exhibit positive or no head patterns whilst those of S. gonzalezi usually have negative head patterns. The purpose of this paper was to investigate head pattern variation (scored in one of six categories) in (polytene) chromosomally identified larvae of the two species and cytotypes of S. exiguum from three collection sites in Ecuador (including one in the onchocerciasis focus). The head patterns of a total of 1183 larvae were studied. Chromosomal identification of penultimate instar larvae revealed only the presence of the Cayapa and Quevedo cytotypes of S. exiguum (n=208). Both cytotypes exhibited a wide range of head patterns from positive to negative. The results indicate that negative head patterns cannot be used to reliably distinguish between larvae of S. exiguum s.l. and S. gonzalezi. All except one larva with negative head patterns were females (n=53), suggesting that head pattern in this species complex might be a sex-linked character.
An investigation into the feasibility of using a laser-generated plasma source of soft X rays as a laboratory based instrument for biological imaging and microlithography is presented. A preliminary characterization of the source has been carried out with carbon, copper and aluminum targets with specific interest in generating a monochromatic source of soft X rays in the ‘water window’. Measurements of X-ray production with respect to angular distribution, effects of cratering and different focusing conditions are reported. Initial conclusions on the optimization of the source for use in biological imaging are drawn.
Pharmaceutical companies have to face huge risks and enormous costs of production before they can produce a drug. Efficient allocation of resources is essential to help in maximizing profits. Yu and Gittins (2007) described a model and associated software for determining efficient allocations for a preclinical research project. This is the starting point for this paper. We provide explicit optimal policies for the selection of successive candidate drugs for two restricted versions of the Yu and Gittins (2007) model. To some extent these policies are likely to be applicable to the unrestricted model.
Recommend this
Email your librarian or administrator to recommend adding this to your organisation's collection.