Surface composition and structure of Co\u3csub\u3e3\u3c/sub\u3eO\u3csub\u3e4\u3c/sub\u3e(110) and the effect of impurity segregation

The Co3O4 (110) single crystal surface has been characterized by low energy electron diffraction (LEED), Auger electron spectroscopy, and x-ray photoelectron spectroscopy (XPS). LEED analysis of the clean Co3O4 (110) spinel surface shows a well-ordered pattern with sharp diffraction features. The XPS spectra are consistent with stoichiometric Co3O4 as determined by the concentration ratio of oxygen to cobalt (CO /CCo) and spectral peak shape. In particular, the cobalt 2p XPS spectra are characteristic of the spinel structure with Co3+ occupying octahedral sites and Co2+ in tetrahedral sites within the lattice. During prolonged heating at 630 K, bulk impurities of K, Ca, Na, and Cu segregated to the surface. Sodium desorbed from the surface as NaOH at 825 K, potassium and calcium were only removed by sputtering since no desorption from the surface was detected for temperatures up to 1000 K. Copper also disappeared upon heating above 700 K, most likely by desorbing although the possibility of diffusion back into the bulk could not be eliminated. The appearance of copper impurities correlated with Co3O4 (110) surface reduction to CoO, and the surface could not be fully reoxidized even upon extended oxygen annealing as long as the copper impurity remained on the surface. Upon removal of the Cu from the near-surface region, the surface was easily reoxidized to Co3O4 by O2

DNA Topology Influences Molecular Machine Lifetime in Human Serum

DNA nanotechnology holds the potential for enabling new tools for biomedical engineering, including diagnosis, prognosis, and therapeutics. However, applications for DNA devices are thought to be limited by rapid enzymatic degradation in serum and blood. Here, we demonstrate that a key aspect of DNA nanotechnology—programmable molecular shape—plays a substantial role in device lifetimes. These results establish the ability to operate synthetic DNA devices in the presence of endogenous enzymes and challenge the textbook view of near instantaneous degradation

A many-analysts approach to the relation between religiosity and well-being

The relation between religiosity and well-being is one of the most researched topics in the psychology of religion, yet the directionality and robustness of the effect remains debated. Here, we adopted a many-analysts approach to assess the robustness of this relation based on a new cross-cultural dataset (N=10,535 participants from 24 countries). We recruited 120 analysis teams to investigate (1) whether religious people self-report higher well-being, and (2) whether the relation between religiosity and self-reported well-being depends on perceived cultural norms of religion (i.e., whether it is considered normal and desirable to be religious in a given country). In a two-stage procedure, the teams first created an analysis plan and then executed their planned analysis on the data. For the first research question, all but 3 teams reported positive effect sizes with credible/confidence intervals excluding zero (median reported β=0.120). For the second research question, this was the case for 65% of the teams (median reported β=0.039). While most teams applied (multilevel) linear regression models, there was considerable variability in the choice of items used to construct the independent variables, the dependent variable, and the included covariates

A Many-analysts Approach to the Relation Between Religiosity and Well-being

The relation between religiosity and well-being is one of the most researched topics in the psychology of religion, yet the directionality and robustness of the effect remains debated. Here, we adopted a many-analysts approach to assess the robustness of this relation based on a new cross-cultural dataset (N = 10, 535 participants from 24 countries). We recruited 120 analysis teams to investigate (1) whether religious people self-report higher well-being, and (2) whether the relation between religiosity and self-reported well-being depends on perceived cultural norms of religion (i.e., whether it is considered normal and desirable to be religious in a given country). In a two-stage procedure, the teams first created an analysis plan and then executed their planned analysis on the data. For the first research question, all but 3 teams reported positive effect sizes with credible/confidence intervals excluding zero (median reported β = 0.120). For the second research question, this was the case for 65% of the teams (median reported β = 0.039). While most teams applied (multilevel) linear regression models, there was considerable variability in the choice of items used to construct the independent variables, the dependent variable, and the included covariates

Engaging audiences with difficult pasts: the Voices of ’68 Project at the Ulster Museum, Belfast

Can history museums influence the relationship between divided communities? This paper explores why an initially modest collaboration between the authors and the Ulster Museum on the non‐violent Northern Ireland Civil Rights Movement of 1968/69, eventually had substantial impact beyond the museum’s walls. Having placed the Northern Ireland Civil Rights Movement within the context of both the international protests of 1968 and the specific environment of Northern Ireland, particularly the virtual civil war known as the Troubles, the paper turns to the role of museums in responding to the legacy of this past, and the evolving practice of the Ulster Museum, as background to the project. The latter began as a limited intervention within an existing display, based on oral histories and underpinned by the theory of ‘agonism’, proposing that divided communities must learn to live with difference. It eventually included exhibitions, workshops, school study days, curricular materials and online provision. It has directly influenced the Northern Ireland GCSE History Curriculum and been held up as an example of good practice within the province’s peace process. The paper discusses why the project succeeded – location within a national museum; credibility with protagonists, academics, communities and audiences; starting small; a willingness to take risks and share control; multiple perspectives; and an acceptance that not everyone will be satisfied. With a version of the Voices of 68 exhibition now installed in the Museum’s permanent gallery, the next challenges are longitudinal studies on its impact and assessing the approach’s relevance to other museums working in post‐conflict societies

The evolving SARS-CoV-2 epidemic in Africa: Insights from rapidly expanding genomic surveillance

INTRODUCTION Investment in Africa over the past year with regard to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) sequencing has led to a massive increase in the number of sequences, which, to date, exceeds 100,000 sequences generated to track the pandemic on the continent. These sequences have profoundly affected how public health officials in Africa have navigated the COVID-19 pandemic. RATIONALE We demonstrate how the first 100,000 SARS-CoV-2 sequences from Africa have helped monitor the epidemic on the continent, how genomic surveillance expanded over the course of the pandemic, and how we adapted our sequencing methods to deal with an evolving virus. Finally, we also examine how viral lineages have spread across the continent in a phylogeographic framework to gain insights into the underlying temporal and spatial transmission dynamics for several variants of concern (VOCs). RESULTS Our results indicate that the number of countries in Africa that can sequence the virus within their own borders is growing and that this is coupled with a shorter turnaround time from the time of sampling to sequence submission. Ongoing evolution necessitated the continual updating of primer sets, and, as a result, eight primer sets were designed in tandem with viral evolution and used to ensure effective sequencing of the virus. The pandemic unfolded through multiple waves of infection that were each driven by distinct genetic lineages, with B.1-like ancestral strains associated with the first pandemic wave of infections in 2020. Successive waves on the continent were fueled by different VOCs, with Alpha and Beta cocirculating in distinct spatial patterns during the second wave and Delta and Omicron affecting the whole continent during the third and fourth waves, respectively. Phylogeographic reconstruction points toward distinct differences in viral importation and exportation patterns associated with the Alpha, Beta, Delta, and Omicron variants and subvariants, when considering both Africa versus the rest of the world and viral dissemination within the continent. Our epidemiological and phylogenetic inferences therefore underscore the heterogeneous nature of the pandemic on the continent and highlight key insights and challenges, for instance, recognizing the limitations of low testing proportions. We also highlight the early warning capacity that genomic surveillance in Africa has had for the rest of the world with the detection of new lineages and variants, the most recent being the characterization of various Omicron subvariants. CONCLUSION Sustained investment for diagnostics and genomic surveillance in Africa is needed as the virus continues to evolve. This is important not only to help combat SARS-CoV-2 on the continent but also because it can be used as a platform to help address the many emerging and reemerging infectious disease threats in Africa. In particular, capacity building for local sequencing within countries or within the continent should be prioritized because this is generally associated with shorter turnaround times, providing the most benefit to local public health authorities tasked with pandemic response and mitigation and allowing for the fastest reaction to localized outbreaks. These investments are crucial for pandemic preparedness and response and will serve the health of the continent well into the 21st century

Hawai'i WIC's Unique Breastfeeding Initiatives

Hawai‘i has its own unique breastfeeding environment--breastfeeding initiation rates exceed national goals, yet breastfeeding duration decreases sharply after the first few weeks. This manuscript presents a review of three programs Hawai‘i Women, Infant’s and Children’s Special Supplemental Nutrition Program (WIC) of the Hawai‘i Department of Health has instituted to increase the initiation and duration of breastfeeding among its participants. These three projects are: The Breast Pump Program and evaluation, The Nursing Drape Project, and the Pumps in the Schools Program. The WIC Breast Pump Program is an open system and accounts for women in a variety of work/school environments. Success in such a system is more challenging to determine; however, any documented changes in breastfeeding duration may be more significant than in a restricted setting. Consequently, WIC began an evaluation of its Breast Pump Program in 2002. Embarrassment has been shown to be a number one breastfeeding concern for WIC women across the nation so Hawai‘i WIC designed, created, distributed and evaluated their own nursing drape that is both culturally acceptable and inexpensive. Results of this project are presented along with cost saving and implications to other states. The goal of the Pumps in the Schools Program is to increase the teen breastfeeding prevalence and duration for WIC high school students by providing WIC purchased hospital grade electric breast pumps and placing them in a supportive classroom setting. The program serves to decrease at least one barrier to breastfeeding for these high-risk mothers. Hawai‘i WIC is tackling working and schooling issues, duration, and embarrassment about public breastfeeding. In essence, Hawai‘i is changing the image of WIC to be ‘the breastfeeding people’ instead of the ‘formula give-away program’

Epidemiology of Low Birth Weight and Preterm Delivery, in Hawai`i, 2000-2001

To create a better understanding of Hawai`i’s birthing population so that culturally appropriate strategies to prevent infant mortality could be developed, we undertook an analysis of population-based perinatal data collected in Hawai`i for the years 2000 and 2001. The data were collected by the Pregnancy Risk Assessment Monitoring System (PRAMS). In this system, a stratified random sample of women who delivered a live born infant are mailed a self-administered questionnaire two to six months after they deliver, with telephone follow-up for those who do not respond. A bivariate analyses of maternal characteristics of singleton infants and the prevalence of low birth weight (<2,500 grams) and preterm delivery (<37 weeks gestational age) at the time of PRAMS survey were conducted using chi-square test statistics. To assess the independent effects of the sociodemographic and behavioral variables on the outcome, we constructed logistic regression models adjusting for age, education, race/ethnicity, marital status, household income, area of residence, 1st trimester entry into prenatal care, 3rd trimester smoking or drinking alcohol, illegal drug use, and being the victim of physical abuse during the pregnancy. We estimated model coefficients by using unconditional maximum likelihood methods and we estimated relative risks by calculating adjusted odds ratios (aORs). A total of 6,251 women were sampled and 5,009 responded, for a response rate of 80%. Most women (98.6%) had some prenatal care, although nearly 20% entered care in the second or third trimester. Women who were less than 20 years of age (aOR 1.7; 95% confidence interval [CI] 1.1-2.6) or had only a high school education (aOR 1.5; 95% CI 1.1-2.0) were more likely to have delivered a low birth weight infant than were older more educated women. After adjustment, only women who were not married were more likely to have had a preterm delivery than were married women (aOR 1.5; 95% CI 1.1-2.0). In conclusion, we found that risk factors for low birth weight and preterm delivery among singleton infants in Hawai`i were not different from risk factors reported for mainland populations, namely maternal age, education and marital status. Hawai`i PRAMS has been a valuable source of data about the women giving birth in Hawai`i. Further analyses of these perinatal data should provide useful information for clinicians, policymakers and public health advocates

EXERCISE AND PREGNANCY OUTCOME AMONG URBAN, LOW-INCOME, BLACK WOMEN

https://www.ethndis.org/priorarchives/ethn-16-04-933.pd