Facultative secondary lecithotrophy in the megalopa of the shrimp Lysmata seticaudata (Risso, 1816) (Decapoda : Hippolytidae) under laboratory conditions

Certain decapod crustaceans can catabolize internal reserves to undergo partial or full larval development. This feature is termed secondary lecithotrophy, if energy used results from plankton derived organic matter accumulated Ig earlier larval stages. The present work reports the ability of Lysmata seticaudata megalopa to moll to the first juvenile stage in the absence of food. Unlike previous records of secondary lecithotrophy displayed by nonfeeding last larval stages of hermit crabs and spiny lobsters, the megalopa of L. seticaudata retains its feeding capacity. This is the first time such a feature has been reported in decapods, and the term facultative secondary lecithotrophy is proposed. The build up of energy reserves continues during the last zoeal stage of L. seticaudata, with starved zoea IX failing to molt to megalopa. Energy reserves that enable starved megalopa to molt to juvenile seem to be partially depleted, with starved juveniles produced either from, starved or fed megalopae being unable to molt to the next juvenile stage. The longer resistance of starved juveniles produced from fed megalopae (nine days), compared to that of starved juveniles produced from starved megalopae (five days), indicates that some energy reserves may pass to juvenile, not being totally depleted at metamorphosis.info:eu-repo/semantics/publishedVersio

Therapeutic Environment and Premature newborns Development

Introduction: Prematurity is the leading cause of neonatal mortality, however, the survival of preterm infants is guaranteed. Prolonged exposure to numerous sensory stimuli during early neonatal intensive care units contributes to the increased likelihood of organic and/or psychological sequelae. Objectives: Identify the best measures to minimize the impact that the sensorial environment of neonatal intensive care units has on the development of premature newborns. Methods: An integrative literature review was carried out in CINAHL, PubMed and MEDLINE databases, according to the PICOD methodology (participants, intervention, context, results and design). Results: The analysis of the 6 articles included in the study showed a set of environmental measures to be included in the care of premature newborns. The main recommendations mentioned were organized into categories, namely, physical environment, sensory environment, technology and parental training. Conclusion: From this review emerges the need to define consistent and consensual strategies for the optimization of the therapeutic environment in neonatal intensive care units

Nursing care needs for the family of the child with chronic illness

From the birth of a child with a chronic and/or complex disease, there is a need at an all priorities level within the family and/or the primary caregivers of these children. A chronic illness is a condition that interferes with the day-to-day functioning of the child and their caregivers. As such, the purpose of this integrative review is to identify the needs of nursing care for parents/caregivers or family of children with chronic or complex illnesses. Methods: The research was carried out on the EBSCO platform, and all databases were selected using the descriptors needs, parents, pediatrics and nursing. Taking into account the research delimiters and the inclusion and exclusion criteria, a final sample of eight articles was obtained, which were analyzed. Results: The results were obtained from a free reading/analysis of the articles selected from the research in the databases, leading to the extraction of results that addressed the needs of nursing care to the parents/caregivers/family of children with chronic diseases. Conclusions: Families and/or caregivers of children with chronic diseases and/or complex diseases circumvent many barriers and many of them difficult to overcome, but never giving up because they have many skills and power to deal with them

Impact of the Nursing Home Visit to the newborn/ infant/family

Objective: To identify the impact of the home visit to the newborn/infant/family, when performed by nurses, on the health and well-being of the child and family. Methodology: A systematic review of the literature was carried out following the Joanna Briggs Institute methodology, based on a research on the EBSCO and pubmed platform, and bibliographical references of the articles found, with the chronological frieze 2010 and 2017. Were included Randomized controlled trials evaluating the impact of the home visit of nursing performed when they were newborns/infants, in the health and wellbeing of the child and family, in children/adolescents/families. Results: We selected 11 articles, randomized controlled trials, 7 experimental and 4 follow-up. The data systematization process was carried out using tables that facilitated the analysis of the studies. We have found studies that evaluate the impact of the home visit to the newborn/infant/family in the short (2) and long (9) term, developed with great heterogeneity in the intervention of the home visit performed and evaluated impacts, but the results show gains in the well-being of children and families. Conclusions: It is evident from the results found that the home visit of the newborn/ infant/family, performed by nurses, has a positive impact on the health and well-being of the child and the family

Is it possible for a perovskite p-n homojunction to persist in the presence of mobile ionic charge?

Recently Cui et al. reported on the fabrication a p-n homojunction perovskite solar cell (PSC) using stoichiometric control of sequentially-deposited perovskite layers. The authors propose that the junction leads to an enhanced electric field in the perovskite absorber resulting in improved charge separation. In this response to Cui et al. 2019 we show that the experimental data presented in the paper does not directly support this claim. Furthermore, Cui et al.'s thesis is not compatible with the large body of existing literature showing that mobile ionic defects present in methyl-ammonium lead iodide (MAPI) and its derivatives are highly mobile at room temperature. Using drift diffusion device simulations we show that large densities of mobile ionic charge in the system are likely to the screen any beneficial effects of a p-n homojunction.Comment: 17 pages, 5 figures, Response to a published article by Cui et a

Mom, Dad It’s Only a Game! Perceived Gambling and Gaming Behaviors among Adolescents and Young Adults: an Exploratory Study

Gambling and gaming are increasingly popular activities among adolescents. Although gambling is illegal in Portugal for youth under the age of 18 years, gambling opportunities are growing, mainly due to similarity between gambling and other technology-based games. Given the relationship between gambling and gaming activities, the paucity of research on gambling and gaming behaviors in Portugal, and the potential negative consequences in the lives of young people, the goal of this study was to explore and compare the perceptions of these two behaviors between Portuguese adolescents and young adults. Results from six focus groups (three with adolescents and three with young adults, comprising 37 participants aged between 13 and 26 years) indicated different perceptions for the two age groups. For adolescents, gaming was associated with addiction whereas for young adults it was perceived a tool for increasing personal and social skills. With regard to gambling, adolescents associated it with luck and financial rewards, whereas young adults perceived it as an activity with more risks than benefits. These results suggest developmental differences that have implications for intervention programs and future research

Learning to Rank Academic Experts in the DBLP Dataset

Expert finding is an information retrieval task that is concerned with the search for the most knowledgeable people with respect to a specific topic, and the search is based on documents that describe people's activities. The task involves taking a user query as input and returning a list of people who are sorted by their level of expertise with respect to the user query. Despite recent interest in the area, the current state-of-the-art techniques lack in principled approaches for optimally combining different sources of evidence. This article proposes two frameworks for combining multiple estimators of expertise. These estimators are derived from textual contents, from graph-structure of the citation patterns for the community of experts, and from profile information about the experts. More specifically, this article explores the use of supervised learning to rank methods, as well as rank aggregation approaches, for combing all of the estimators of expertise. Several supervised learning algorithms, which are representative of the pointwise, pairwise and listwise approaches, were tested, and various state-of-the-art data fusion techniques were also explored for the rank aggregation framework. Experiments that were performed on a dataset of academic publications from the Computer Science domain attest the adequacy of the proposed approaches.Comment: Expert Systems, 2013. arXiv admin note: text overlap with arXiv:1302.041