Компьютерная оценка формы графита в высокопрочном чугуне

Разработана методика индивидуальной и групповой оценки фактора формы графита в высокопрочном чугуне на основе некоммерческой программы ImageJ. Установлены графические и аналитические зависимости для перехода от значений фактора формы графита к соответствующим эталонным структурам, и наоборот, – от эталонных структур к фактору формы.Розроблена методика індивідуальної та групової оцінки фактора форми графіту у високоміцному чавуні на основі некомерційної програми ImageJ. Встановлено графічні та аналітичні залежності для переходу від значень фактора форми графіту до відповідних еталонних структур, і навпаки, – від еталонних структур до фактора форми.The technique of individual and group assessment form factor of graphite in ductile iron, based on a non-profit program ImageJ. Established graphic and analytic expressions for the transition from the values of the form factor of graphite to the corresponding reference structures and vice versa - from the reference structures to the form factor

The association of attachment style, postpartum PTSD and depression with bonding- A longitudinal path analysis model, from childbirth to six months.

BACKGROUND: There is substantial evidence that postpartum depression (PPD) is associated with a poor mother-infant bond, however, fewer studies have examined the role of other postpartum psychopathologies such as birth-related PTSD or relevant trait variables such as adult attachment styles in the quality of the mother-infant bond. METHODS: 210 postpartum women were sampled in a maternity ward of a tertiary health care center. Participants completed questionnaires at three-time points. Demographics questionnaire and the Adult Attachment style scale were administrated at 1-4 days postpartum, the City Birth Trauma Scale and the Edinburgh Postpartum Depression Scale two months postpartum and the Postpartum Bonding questionnaire at six months postpartum. RESULTS: The associations between adult attachment styles and postpartum bonding were fully mediated by postpartum psychopathology. Avoidant attachment had indirect effects on bonding through general PTSD symptoms (Beta=0.05, p=.019) and PPD (Beta=0.06, p=.010). Anxious attachment also had indirect effects on bonding through general PTSD symptoms (Beta=0.04, p=.044) and PPD (Beta=0.10, p=.001). In contrast, birth-related PTSD symptoms were not associated with bonding. The model presented a good fit. LIMITATIONS: Women sampled from one health-care center and self-report measures used. CONCLUSIONS: Our results suggest that although birth-related PTSD symptoms may cause difficulties, importantly they may not be associated with bonding difficulties six months postpartum. Therefore, women could be reassured that their birth-related PTSD symptoms, may not impact on bonding. Consequently, if interventions are specifically aimed at improving the mother-infant bond, the general-related PTSD, PPD symptoms and insecure attachment styles should be the focus of treatment

Going through it together: Dyadic associations between parents' birth experience, relationship satisfaction, and mental health

BACKGROUND: Previous research suggests that a negative birth experience is associated with symptoms of postpartum depression and anxiety in mothers and partners. However, this has mostly been investigated within the first year postpartum and research on the long-term effects is lacking. Additionally, the role of relationship satisfaction and the interdependence between parents have not been considered so far. METHODS: Couples (N = 1992) completed questionnaires on their birth experience, relationship satisfaction, and symptoms of depression and anxiety at two months, 14 months, and two years after birth, respectively. RESULTS: Actor-Partner Interdependence Mediation Models indicated no partner effects, but several significant actor and indirect effects. A more positive birth experience was associated with higher relationship satisfaction and less depression and anxiety symptoms for both parents. Higher relationship satisfaction was in turn associated with less depression (mothers and partners) and anxiety symptoms (mothers). The association between birth experience and depression symptoms was partially mediated by relationship satisfaction for mothers and partners, while the association between birth experience and anxiety symptoms was partially mediated by relationship satisfaction only for mothers. LIMITATIONS: Due to the highly educated, very healthy sample with low levels of depression and anxiety as well as high relationship satisfaction, results cannot be generalized to less privileged parents. Moreover, all effects were very small. CONCLUSIONS: Results highlight the importance of a positive birth experience for parents' relationship satisfaction and mental health. Negative birth experiences need to be avoided to prevent a negative impact on the whole family

Women’s, partners’ and healthcare providers’ views and experiences of assisted vaginal birth: a systematic mixed methods review

Background When certain complications arise during the second stage of labour, assisted vaginal delivery (AVD), a vaginal birth with forceps or vacuum extractor, can effectively improve outcomes by ending prolonged labour or by ensuring rapid birth in response to maternal or fetal compromise. In recent decades, the use of AVD has decreased in many settings in favour of caesarean section (CS). This review aimed to improve understanding of experiences, barriers and facilitators for AVD use. Methods Systematic searches of eight databases using predefined search terms to identify studies reporting views and experiences of maternity service users, their partners, health care providers, policymakers, and funders in relation to AVD. Relevant studies were assessed for methodological quality. Qualitative findings were synthesised using a meta-ethnographic approach. Confidence in review findings was assessed using GRADE CERQual. Findings from quantitative studies were synthesised narratively and assessed using an adaptation of CERQual. Qualitative and quantitative review findings were triangulated using a convergence coding matrix. Results Forty-two studies (published 1985–2019) were included: six qualitative, one mixed-method and 35 quantitative. Thirty-five were from high-income countries, and seven from LMIC settings. Confidence in the findings was moderate or low. Spontaneous vaginal birth was most likely to be associated with positive short and long-term outcomes, and emergency CS least likely. Views and experiences of AVD tended to fall somewhere between these two extremes. Where indicated, AVD can be an effective, acceptable alternative to caesarean section. There was agreement or partial agreement across qualitative studies and surveys that the experience of AVD is impacted by the unexpected nature of events and, particularly in high-income settings, unmet expectations. Positive relationships, good communication, involvement in decision-making, and (believing in) the reason for intervention were important mediators of birth experience. Professional attitudes and skills (development) were simultaneously barriers and facilitators of AVD in quantitative studies. Conclusions Information, positive interaction and communication with providers and respectful care are facilitators for acceptance of AVD. Barriers include lack of training and skills for decision-making and use of instruments

Body appreciation around the world: Measurement invariance of the Body Appreciation Scale-2 (BAS-2) across 65 nations, 40 languages, gender identities, and age.

The Body Appreciation Scale-2 (BAS-2) is a widely used measure of a core facet of the positive body image construct. However, extant research concerning measurement invariance of the BAS-2 across a large number of nations remains limited. Here, we utilised the Body Image in Nature (BINS) dataset - with data collected between 2020 and 2022 - to assess measurement invariance of the BAS-2 across 65 nations, 40 languages, gender identities, and age groups. Multi-group confirmatory factor analysis indicated that full scalar invariance was upheld across all nations, languages, gender identities, and age groups, suggesting that the unidimensional BAS-2 model has widespread applicability. There were large differences across nations and languages in latent body appreciation, while differences across gender identities and age groups were negligible-to-small. Additionally, greater body appreciation was significantly associated with higher life satisfaction, being single (versus being married or in a committed relationship), and greater rurality (versus urbanicity). Across a subset of nations where nation-level data were available, greater body appreciation was also significantly associated with greater cultural distance from the United States and greater relative income inequality. These findings suggest that the BAS-2 likely captures a near-universal conceptualisation of the body appreciation construct, which should facilitate further cross-cultural research. [Abstract copyright: Copyright © 2023 The Authors. Published by Elsevier Ltd.. All rights reserved.

Body appreciation around the world: Measurement invariance of the Body Appreciation Scale-2 (BAS-2) across 65 nations, 40 languages, gender identities, and age

Abstract The Body Appreciation Scale-2 (BAS-2) is a widely used measure of a core facet of the positive body image construct. However, extant research concerning measurement invariance of the BAS-2 across a large number of nations remains limited. Here, we utilised the Body Image in Nature (BINS) dataset – with data collected between 2020 and 2022 – to assess measurement invariance of the BAS-2 across 65 nations, 40 languages, gender identities, and age groups. Multi-group confirmatory factor analysis indicated that full scalar invariance was upheld across all nations, languages, gender identities, and age groups, suggesting that the unidimensional BAS-2 model has widespread applicability. There were large differences across nations and languages in latent body appreciation, while differences across gender identities and age groups were negligible-to-small. Additionally, greater body appreciation was significantly associated with higher life satisfaction, being single (versus being married or in a committed relationship), and greater rurality (versus urbanicity). Across a subset of nations where nation-level data were available, greater body appreciation was also significantly associated with greater cultural distance from the United States and greater relative income inequality. These findings suggest that the BAS-2 likely captures a near-universal conceptualisation of the body appreciation construct, which should facilitate further cross-cultural research