Lost and found: Patterns of marine litter accumulation on the remote Island of Santa Luzia, Cabo Verde.

Santa Luzia, an uninhabited island in the archipelago of Cabo Verde, serves as a natural laboratory and important nesting site for loggerhead turtles Carettacaretta. The island constitutes an Integral Natural Reserve and a Marine Protected Area. We assessed marine litter accumulation on sandy beaches of the island and analysed their spatial patterns using two sampling methods: at a fine scale, sand samples from 1 × 1 m squares were collected, identifying debris larger than 1 mm; at a coarse scale, drone surveys were conducted to identify visible marine debris (>25 mm) in aerial images. We sampled six points on three beaches of the island: Achados (three points), Francisca (two points) and Palmo Tostão (one point). Then, we modelled the abundance of marine debris using topographical variables as explanatory factors, derived from digital surface models (DSM). Our findings reveal that the island is a significant repository for marine litter (>84% composed of plastics), with up to 917 plastic items per m2 in the sand samples and a maximum of 38 macro-debris items per m2 in the drone surveys. Plastic fragments dominate, followed by plastic pellets (at the fine-scale approach) and fishing materials (at the coarse-scale approach). We observed that north-facing, higher-elevation beaches accumulate more large marine litter, while slope and elevation affect their spatial distribution within the beach. Achados Beach faces severe marine debris pollution challenges, and the upcoming climate changes could exacerbate this problem.

Double Stigma in Portuguese Lesbian, Gay, and Bisexual Older Adults: A Study of Health Status.

The double stigma-sexual stigma and ageism-can affect the health status of lesbian, gay, and bisexual (LGB) older adults, but little is known about this topic in Portugal and internationally. The aim of this study was to assess the health status and the prevalence of chronic diseases of Portuguese LGB older adults, as well as to assess the relationship between double stigma and health status. A sample of 280 Portuguese LGB older adults completed a chronic disease questionnaire, the Homosexuality-Related Stigma Scale, the Ambivalent Ageism Scale, and the SF-12 Short Form Health Survey. A structural equation model was performed using the double stigma variables as independent variables and health status as outcome. The mental health status of Portuguese LGB older adults was lower when compared to people from studies from more than 10 countries. Higher sexual self-stigma, sexual enacted stigma related to health care, and benevolent ageism significantly explained the worse general health status. The double stigma significantly affects the health status of these older adults in a profile of internalization of sexual stigma and benevolent age discrimination, and not necessarily by a hostile/aggressive profile. More research is needed on the double stigma.

Loneliness, ageism, and mental health: The buffering role of resilience in seniors

Introduction: Ageism and loneliness are two relevant public health phenomena because of their negative impact on the senior's mental health. With the increase in average life expectancy, these tend to co-occur, which may increase the psychological distress (PD) of seniors. Resilience has been shown to be an important protective factor of seniors mental health, although its potential buffering role of public health risk factors with cumulative impact on mental health, such as loneliness and ageism, needs to be more studied. Aim: To assess the potential mediator role of resilience between the effects of ageism and loneliness on PD in seniors. Methods: A sample of 349 Portuguese seniors aged 60 years and over was collected through an online survey and during the COVID-19 pandemic period. Seniors completed the Kessler Psychological Distress Scale (K6), the Short-Form of UCLA Loneliness Scale (USL-6), the Ambivalent Ageism Scale (AAS) and the Connor-Davidson Resilience Scale (CD-RISC-10). A mediation analysis model was developed with resilience as a mediating variable. Results: There were moderate to high levels of PD and moderate levels of ageism, loneliness and resilience. Resilience fully mediated the effect of ageism on PD and partially mediated the effect of loneliness on PD. Conclusions: Resilience was an important protective factor of mental health against the effects of ageism, and partially protected mental health from the effects of loneliness among seniors. It is suggested that resilience be considered as a factor to be integrated in future intervention programs for mental health. The practical applicability of this study is discussed. (AU)

Loneliness, ageism, and mental health: The buffering role of resilience in seniors.

Introduction: Ageism and loneliness are two relevant public health phenomena because of their negative impact on the senior's mental health. With the increase in average life expectancy, these tend to co-occur, which may increase the psychological distress (PD) of seniors. Resilience has been shown to be an important protective factor of seniors mental health, although its potential buffering role of public health risk factors with cumulative impact on mental health, such as loneliness and ageism, needs to be more studied. Aim: To assess the potential mediator role of resilience between the effects of ageism and loneliness on PD in seniors. Methods: A sample of 349 Portuguese seniors aged 60 years and over was collected through an online survey and during the COVID-19 pandemic period. Seniors completed the Kessler Psychological Distress Scale (K6), the Short-Form of UCLA Loneliness Scale (USL-6), the Ambivalent Ageism Scale (AAS) and the Connor-Davidson Resilience Scale (CD-RISC-10). A mediation analysis model was developed with resilience as a mediating variable. Results: There were moderate to high levels of PD and moderate levels of ageism, loneliness and resilience. Resilience fully mediated the effect of ageism on PD and partially mediated the effect of loneliness on PD. Conclusions: Resilience was an important protective factor of mental health against the effects of ageism, and partially protected mental health from the effects of loneliness among seniors. It is suggested that resilience be considered as a factor to be integrated in future intervention programs for mental health. The practical applicability of this study is discussed.

The Upside of Negative Emotions: How Do Older Adults From Different Cultures Challenge Their Self-Growth During the COVID-19 Pandemic?

Background and Objective: The outbreak of Coronavirus Disease 2019 (COVID-19) has raised increased challenges for older adults' personal growth in diverse cultural settings. The aim of this study was to analyze negative emotions and their role on older adults' self-growth in Mexico, Italy, Portugal, and Spain, during the COVID-19 pandemic. For this purpose, a cross-national qualitative research was carried out. Methods: Data were collected from 338 community-dwelling participants aged 65 years and older, using a semi-structured interview protocol. Older adults were asked about negative emotions that significantly contribute to their self-growth during the COVID-19 pandemic. Content analysis was used to identify key themes. Results: Seven main negative emotions (fear, sadness, anger, grief, boredom, loneliness, and shame) significantly contributed to seven themes of self-growth, across the samples: sharing difficult experiences with others, supportive partner, spiritual practices, engagement with life, generativity, volunteering activities, and intimacy and sexual satisfaction. Sharing difficult experiences with others was most pertinent to Mexican (13.9%) and to Italian (3.0%) participants, and a supportive partner to Portuguese (12.1%), and to Spanish participants (6.5%). Conclusion: The findings of this study indicate that negative emotions during the COVID-19 pandemic contributed to their older adults' self-growth. This study highlighted the cultural diversity of experiences during the pandemics and underlined the upside of negative emotions and its relation to older adults' self-growth during this period.

Bullying in Old Age: A Qualitative Study on Older Adults' Perceptions About Being Bullied.

Significant demographic changes and a growing aging population increasingly emphasize the importance of assessing phenomena of violence against older adults, who constitute a vulnerable population. Therefore, bullying in old age is a poorly studied phenomena, but of growing importance. This study aims to analyze the perspectives of bullying in old age, using qualitative research at a cross-national level. We interviewed 173 older participants aged 65-91 years. Participants were Portuguese and English and lived in the community. Participants were subjected to semi-structured interviews. All the interviews went through a process of content analysis. Sample recruitment occurred through initial telephone contact, followed by a request to participate. Outcomes of content analysis produced seven themes, all of them associated with bullying experiences such as compromised learning capacity, loss of sense of agency and decision-making, asexuality, less attractive appearance, less social skills, gender discrimination, and less financial resources. Portuguese older adults felt mostly bullied for their loss of sense of agency and decision-making, less attractive appearance, less social skills, and less financial resources, while English participants mostly felt bullied for their compromised learning capacity, gender discrimination, and asexuality. The themes identified as being the most prominent in bullying are valuable guidelines for social policies and interventions toward bullying among older adults. Considering the scarcity of studies on bullying in older adults, this study is relevant for understanding the experience of older adults in relation to being bullied and for implementing psychosocial intervention programs including bullying situations that affect community-dwelling older adults.

Relative Positioning in Remote Areas Using a GNSS Dual Frequency Smartphone.

The use of GPS positioning and navigation capabilities in mobile phones is present in our daily lives for more than a decade, but never with the centimeter level of precision that can actually be reached with several of the most recent smartphones. The introduction of the new GNSS systems (Global Navigation Satellite Systems), the European system Galileo, is opening new horizons in a wide range of areas that rely on precise georeferencing, namely the mass market smartphones apps. The constant growth of this market has brought new devices with innovative capabilities in hardware and software. The introduction of the Android 7 by Google, allowing access to the GNSS raw code and phase measurements, and the arrival of the new chip from Broadcom BCM47755 providing dual frequency in some smartphones came to revolutionize the positioning performance of these devices as never seen before. The Xiaomi Mi8 was the first smartphone to combine those features, and it is the device used in this work. It is well known that it is possible to obtain centimeter accuracy with this kind of device in relative static positioning mode with distances to a reference station up to a few tens of kilometers, which we also confirm in this paper. However, the main purpose of this work is to show that we can also get good positioning accuracy using long baselines. We used the ability of the Xiaomi Mi8 to get dual frequency code and phase raw measurements from the Galileo and GPS systems, to do relative static positioning in post-processing mode using wide baselines, of more than 100 km, to perform precise surveys. The results obtained were quite interesting with RMSE below 30 cm, showing that this type of smartphone can be easily used as a low-cost device, for georeferencing and mapping applications. This can be quite useful in remote areas where the CORS networks are not dense or even not available.

How Do Older Portuguese and Mexican Adults Experience Their Sexual Well-Being? A Cross-Cultural Qualitative Study.

Sexual well-being (SWB) refers to the subjective emotional and cognitive evaluation of the quality of the individual's sexuality. SWB plays a relevant role in quality of life and health promotion on old age and has cross-cultural implications. In addition to the scarcity of in-depth qualitative studies in this area and studies with cross-cultural samples, no studies have compared perceptions of SWB among Portuguese and Mexican older adults. The aim of this study was to comparatively analyze perspectives on SWB among older adults residing in Portugal and Mexico. Data were collected from 86 Portuguese and 80 Mexican community-dwelling participants aged 65 years and older, using a semi-structured interview protocol. Older adults were asked about factors that significantly contribute to their SWB. Sociodemographic data were also gathered. Content analysis was used to identify key themes. Eight themes were identified across both studied samples: eroticism, supportive relationship, positive self-concept, health and self-care, romance, active life, tenderness and care, and no pain and no pregnancy restrictions. Eroticism was most pertinent to Portuguese participants (31.4%). Health and self-care was most frequently reported by Mexican participants (26.5%). The findings of this study indicate that SWB is strongly influenced by sociocultural and psychosocial values. Cross-cultural comparisons between older Portuguese and Mexican people provide a broader understanding of SWB in older age and suggest a scenario for future culture-adapted interventions and comprehensive policies.

Relações de amizade e autoconceito na adolescência: um estudo exploratório em contexto escolar / Relations of friendship and self-concept in adolescence: An exploratory study in the school context

No presente estudo, analisou-se a relação entre a qualidade das relações de amizade e as autoperceções dos adolescentes, expressas no seu autoconceito. A amostra foi constituída por 65 estudantes portugueses, com idades compreendidas entre os 12 e os 16 anos (M = 14). Os instrumentos foram o Questionário de Qualidade da Amizade e a versão portuguesa do Perfil de Autoperceção da Escala de Autoconceito para Adolescentes. Através de análises correlacionais, verificou-se uma relação entre a qualidade das relações de amizade e o autoconceito, sendo a dimensão companheirismo e recreação preditora do autoconceito global. Verificou-se, ainda, a ausência de um efeito de gênero na qualidade reportada das relações de amizade. Pelo contrário, ocorreu um efeito moderado do gênero no autoconceito, nomeadamente nas dimensões competência escolar, competência atlética, aparência física e autoestima, com o gênero masculino apresentando resultados médios superiores. Os resultados foram discutidos tendo em conta a importância das relações sociais para o desenvolvimento na adolescência.

In the present study, the relationship between friendship quality and adolescents' self-perceptions, expressed through their self-concept, in the school context was investigated. The sample consisted of 65 Portuguese students aged 12-16 years (Mean = 14). The Portuguese versions of the Friendship Quality Questionnaire and the Portuguese version of the Self-perception Profile of the Adolescent Self-Concept Scale were used. Correlational analyses were carried out and showed an association between friendship quality and adolescents' self-concept. The dimension companionship and recreation was predictive of global self-concept. There was no effect of gender on the friendship quality reported. On the other hand, a moderate effect of gender on self-concept was observed, namely on the following dimensions: academic competence, sports competence, physical attractiveness, and self-esteem. In all cases, males had higher scores. The results were discussed considering the importance of social relationships for adolescent development.

HAIRIS: a method for automatic image registration through histogram-based image segmentation.

Automatic image registration is still an actual challenge in several fields. Although several methods for automatic image registration have been proposed in the last few years, it is still far from a broad use in several applications, such as in remote sensing. In this paper, a method for automatic image registration through histogram-based image segmentation (HAIRIS) is proposed. This new approach mainly consists in combining several segmentations of the pair of images to be registered, according to a relaxation parameter on the histogram modes delineation (which itself is a new approach), followed by a consistent characterization of the extracted objects--through the objects area, ratio between the axis of the adjust ellipse, perimeter and fractal dimension--and a robust statistical based procedure for objects matching. The application of the proposed methodology is illustrated to simulated rotation and translation. The first dataset consists in a photograph and a rotated and shifted version of the same photograph, with different levels of added noise. It was also applied to a pair of satellite images with different spectral content and simulated translation, and to real remote sensing examples comprising different viewing angles, different acquisition dates and different sensors. An accuracy below 1° for rotation and at the subpixel level for translation were obtained, for the most part of the considered situations. HAIRIS allows for the registration of pairs of images (multitemporal and multisensor) with differences in rotation and translation, with small differences in the spectral content, leading to a subpixel accuracy.

Reforço radicular interno para colocaçäo de núcleo e coroa / The internal radicular reforce for using of the post and crown

O presente trabalho vem demonstrar um meio alternativo de aproveitamento de dentes com conduto radicular amplo, antes considerados perdidos, através da reconstruçäo da parte interna da raiz com a utilizaçäo de adesivo dentinário, resina composta e pino plástico transmissor de luz (LTP-Luminex)