Kinematic analysis of conically scanned environmental properties

A method for determining the velocity of features such as wind. The method preferably includes producing sensor signals and projecting the sensor signals sequentially along lines lying on the surface of a cone. The sensor signals may be in the form of lidar, radar or sonar for example. As the sensor signals are transmitted, the signals contact objects and are backscattered. The backscattered sensor signals are received to determine the location of objects as they pass through the transmission path. The speed and direction the object is moving may be calculated using the backscattered data. The data may be plotted in a two dimensional array with a scan angle on one axis and a scan time on the other axis. The prominent curves that appear in the plot may be analyzed to determine the speed and direction the object is traveling

Comparative Analysis of a High Bypass Turbofan using a Pulsed Detonation Combustor

It has been proposed that the implementation of a pulsed detonation combustor in a high-bypass turbofan engine would result in an engine that is both more efficient and more reliable. The validity of the performance claims are evaluated based on a comparison between the baseline and hybrid turbofans. The hybrid pulsed detonation engine was modeled in the Numerical Propulsion Simulation System (NPSS) and shares a common architecture with the baseline turbofan model, except that the combustor of the baseline engine is replaced with a pulsed detonation combustor. Detonation effects are calculated using a closed form solution of the Chapman-Jouguet Mach number with a total energy correction applied. Cycle time is calculated to provide a reasonable estimate of frequency for the user input geometry, and the losses due unsteady flow are accounted for by applying pressure and temperature losses to the fluid. A parametric study was performed to evaluate the effects of these losses on net thrust and TSFC. There is a definite level of acceptable loss that if surpassed makes pulsed detonation combustion a good candidate for inclusion into a hybrid turbofan engine

Design and Experimentation of a Premixed Rotating Detonation Engine

Desire for a more efficient air breathing engine has shifted research attention to the Rotating Detonation Engine (RDE). Detonation is a more efficient combustion process than deflagration and provides a pressure gain. The RDE detonation cycle occurs in a compact volume to produce a high specific impulse engine. Computational fluid dynamic (CFD) models have predicted higher specific impulse and detonation wave speeds than has been seen in experimental RDE. The CFD models frequently assume premixed reactants and ignore inlet geometries to facilitate rapid computation. An experimental premixed RDE was sought to test if the premixed assumption in CFD was the root cause of the discrepancy between computational and experimental results. Design of a successful premixed RDE employed a feed system that simultaneously arrested flashback into the premixture while it fed the detonation. Flashback arresting feed designs were explored with single injector tests and validated with a fully premixed RDE. A relationship between arresting length and detonation feed requirements was derived and used to design a premixed RDE that fed premixture through feed slots that were 2.5 cm long and 0.5 mm high and operated on ethylene fuel and air oxidizer. The premixed RDE operated within a narrower region of equivalence ratio than a non-premixed RDE. Chemiluminescence video indicated that the premixed RDE experience combustion reactant-product mixing, and supports the theory that mixing delays are the root cause of slower wave speeds in experimental RDE. Time averaged chemiluminescence results indicate that RDE detonations to not complete the reaction within the detonation wave, and suggest that future CFD studies should assume unmixed reactants, model the full injection geometry, and include a comprehensive chemical mechanism

Depressive symptoms and mental representations in a sample of pregnant Italian women during COVID-19: comparison of primipara and multipara

During the COVID-19 outbreak, the risk of depression has increased for pregnant women and especially for first-time mothers-to-be. Pre-COVID-19 literature showed that depression is negatively linked to mental representations during pregnancy. This pilot study explored the difference in depressive symptoms and maternal representations style in primiparous and multiparous pregnant women during the outbreak of COVID-19 (2020-2021). 25 women (14 primiparous, 11 multiparous) were recruited in their last trimester of pregnancy. Participants responded to the Edinburgh Postnatal Depression Scale (EPDS) and Interview for Maternal Representations during Pregnancy (IntervistasulleRappresentazioniMaterne in Gravidanza- IRMAG). Results showed that primiparous women presented higher depressive symptoms than multiparous ones. Moreover, primiparous women reported lower richness of perception (p = 0.008), openness to change (p = 0.035) and dominance of fantasies (p = 0.000) in maternal representation and, globally, more restricted representations (71.4%) than multiparous ones (18.2%) (p = 0.020). Mental representations were related to the level of depression, with integrated representations being associated with lower depression than restricted and ambivalent ones (p = 0.001). A preventive intervention to support primiparous pregnant women during future pandemics would be necessary in particular to avoid negative repercussions also in the post-partum experience

Prenatal Attachment in Twin Pregnancy

Twin births are associated with several medical, healthcare, socio-emotional, psychological and developmental consequences for families. Parents generally describe twin pregnancies as physically and emotionally difficult. Moreover, compared to singleton pregnancies, twin pregnancies are reported to carry higher maternal as well as perinatal morbidity and mortality. The aim of this chapter is to review literature on twin pregnancy and to give a comprehensive framework about parents’ experience of expecting twins. An important issue related to the psychological adjustment during twin pregnancies is prenatal attachment. During pregnancy, mothers use to think about their child-to-be, and they start to create representation of themselves as mothers. Prenatal attachment in twin pregnancies may differ from that in singleton ones. During a twin pregnancy, the mother-to-be has to deal with an identification process with two children at the same time and have to create a mental space that allow her to make representation of both children. The monitoring of these pregnancies is important for the creation and the consolidation of these maternal representations: ultrasound examinations revealed the fetal gender that facilitates naming the unborn twins and thinking to them as individuals and this is particularly important in the case of complicated twin pregnancies

Factors associated with post-traumatic stress symptoms (PTSS) 4-6 weeks and 6 months after birth: A longitudinal population-based study

BACKGROUND: Identifying factors that precipitate and maintain post-traumatic stress symptoms (PTSS) after birth is important to inform clinical and research practice; yet, prospective longitudinal studies on the predictors of PTSS are limited. This study aimed to determine the pregnancy and postpartum factors associated with PTSS at 4-6 weeks and 6-months postpartum. METHOD: A systematic sample of 950 pregnant women were recruited from three maternity hospitals in Turkey. Participants completed assessments of depression, anxiety, PTSS and social support in pregnancy, 4-6 weeks and 6-months postpartum. Fear of childbirth was assessed in pregnancy and 4-6 weeks after birth. RESULTS: Regression models showed that PTSS six months after birth were associated with anxiety and PTSS in pregnancy, complications during birth, satisfaction with health professionals, fear of childbirth 4-6 weeks after birth, PTSS and depression 4-6 weeks after birth, social support 4-6 weeks after birth, traumatic events after birth, need for psychological help, and social support 6-months after birth. PTSS was highly comorbid with depression and anxiety at all-time points. The most robust predictor of PTSS at 6-months postpartum was PTSS at 4-6 weeks postpartum. Intra-partum complications were not associated with PTSS 4-6 weeks after birth. No socio-demographic variables were correlated with PTSS postpartum. LIMITATIONS: Self-report questionnaires were used to measure outcomes. This study is based on sampling from public hospitals so may not represent women treated in private hospitals. CONCLUSIONS: Associated risk factors may help to identify women at risk of PTSS after birth and to inform targeted early intervention

Using the Transformative Storytelling Technique to Generate Empowering Narratives for Informal Caregivers:Semistructured Interviews, Thematic Analysis, and Method Demonstration

Background: The transformative storytelling technique is an innovative top-down approach to narrative therapy that aims to provide building blocks for creating flourishing narratives for target groups or populations. This approach acts as a facilitator for implementing the human-centered design in developing digital self-help tools for larger samples or target groups.Objective: This study applied the transformative storytelling technique, as a new approach in mental health, to develop empowering audio narratives for informal caregivers.Methods: A narrative inquiry was conducted with 17 informal caregivers (16 women and 1 man) who completed a semistructured interview, “Caregiver Life Story,” acquiring information about the beginning of the role, rising action, and critical point of the role. The participants' ages ranged from 41 to 84 years, with all participants providing care for at least a 6-month period. This inquiry was guided by the transformative storytelling technique, and aimed to collect data relevant to creating fictional stories based on real-life themes.Results: Twenty-five overall themes were distinguished across three a priori-set categories, providing narrative building blocks for the informal caregiver life stories. The final empowering caregiver life story was created as an example for this study, demonstrating the application of the transformative storytelling technique in an informal care context.Conclusions: The creation of empowering stories for populations or target groups in mental health care requires a unified and guided approach that will follow clear guidelines and storytelling principles. The transformative storytelling technique is a first of its kind in the mental health context, representing an initial step in enabling and supporting the creation of meaningful stories and the development of relatable, but productive, narratives. Such narratives have the potential to serve across media and digital platforms for supporting and improving well-being, and potentially triggering self-change in the target group or population.</p

Quality of life among parents of preterm infants: a scoping review

Purpose: To synthesize the body of knowledge on the factors influencing the QoL of mothers and fathers of preterm infants. Methods: A scoping review was performed. Publications indexed in PubMed®, Web of Science™, CINAHL® and PsycINFO® were searched, targeting studies presenting original empirical data that examined parental perception on QoL after a preterm delivery. Eligibility and data extraction were conducted by two independent researchers. The main quantitative findings were synthesized and qualitative data were explored by content analysis. Results: The studies, 11 quantitative and 1 mixed methods, were derived mainly from the USA (n = 6). Heterogeneity across the studies was observed regarding the operationalization of QoL and the use of units of analysis (mothers, parents, families and caregivers). In a context where 40 out of 45 covariates were analysed by only one or two studies, results suggested that parental QoL after a preterm delivery is influenced by factors related with mother’s characteristics, family issues and health care environment rather than infants’ variables. Factors regarding fathers’ characteristics and structural levels were not addressed. Conclusions: Standardizing the operationalization of the QoL when analysing mothers and fathers of preterm infants calls for a structured questionnaire adapted to their specific needs. Further research should include both mothers and fathers, invest in mixed methods approaches and be performed in different countries and settings for allowing integration and comparison of findings.This work was supported by FEDER funding from the Operational Programme Factors of Competitiveness—COMPETE and by national funding from the Foundation for Science and Technology—FCT (Portuguese Ministry of Science, Technology and Higher Education) under the project “Parenting roles and knowledge in Neonatal Intensive Care Units” (FCOMP-01-0124-FEDER-019902; Ref. FCT PTDC/CS-ECS/120750/2010) and the Unidade de Investigação em Epidemiologia—Instituto de Saúde Pública da Universidade do Porto (EPIUnit) (POCI-01-0145-FEDER-006862; Ref. UID/DTP/04750/2013); the grants PD/BD/105830/2014 (to MA), SFRH/BPD/103562/2014 (to EA), co-funded by the FCT and the POPH/FSE Program and the FCT Investigator contract IF/01674/2015 (to SS)

An Italian Study

The literature provides some evidence that the use of violent video games increases the risk for young people to develop aggressive cognitions and even behaviors. We aimed to verify whether exposure to violent video games is linked to problems of aggression in a sample of Italian children. Four questionnaires were administered to 346 children between 7 and 14 years of age, attending primary and secondary schools in Northern Italy. Variables measured were externalization, quality of interpersonal relationships, aggression, quality of coping strategies, and parental stress. Participants who preferred violent games showed higher scores for externalization and aggression. The use of violent video games and age were linked to higher levels of aggression, coping strategies, and the habitual video game weekly consumption of participants. Our data confirm the role of violent video games as risk factors for problems of aggressive behavior and of externalization in childhood and early adolescence

Cancer and Pregnancy: becoming parents after an oncological diagnosis in women

The issue of cancer and pregnancy will be increasingly topical giving the rising trend of women diagnosed with cancer during childbearing period. Although oncological progress has allowed women who receive cancer diagnosis before or during pregnancy to satisfy their desire for maternity and to carry on gestation, there is still few awareness. In this chapter we present our research project and results carry out to date. The aim is to better understand challenges of women who experience pregnancy after or during cancer compared with non-oncological sample. We focus on the impact of cancer in the construction of prenatal attachment and related psychological aspects. We study resilience considered as a protective factor in the construction of mother-fetus relationship. Then, we present the results of a qualitative study conducted in order to have a deeper understanding of the psychological dynamics that help women with cancer diagnosis to develop their maternal identity. We explore the topic of breastfeeding in women with cancer history, investigating how the feeding method is related to mother’s mood states. Finally, we present the results about the cortisol concentration measurement during pregnancy. Our results show how it is very important to give women with oncological diagnosis the adequate support during puerperium