Tag: Method

  • Fast-charging damages electric car batteries

    Fast-charging damages electric car batteries

    Commercial fast-charging stations subject electric car batteries to high temperatures and high resistance that can cause them to crack, leak, and lose their storage capacity, write engineers at the University of California, Riverside in a new study published in Energy Storage. To remedy this, the researchers have developed a method for charging at lower temperatures with less risk of catastrophic damage and loss of storage capacity.

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  • Researchers organically engineer solar cells using enzymes in papaya fruit

    Researchers organically engineer solar cells using enzymes in papaya fruit

    Titanium dioxide (titania) thin films are commonly used in various types of solar cells. The fabrication methods that are currently used to create such titania films require high temperatures, as well as expensive, high-end technologies. Researchers at Delft University of Technology (TU Delft) have now developed a fully organic method to engineer porous titania thin films at relatively low temperatures.

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  • The unmet need for social context in family planning

    The unmet need for social context in family planning

    New evidence on the relationship between sexual health and social context finds a strong association between gender equality, education and family planning

    Twenty-five years ago, two global events – the International Conference on Population and Development and the Fourth World Conference on Women in Beijing – formally recognized that women’s health and reproductive choices cannot be separated from the social context of their lives.

    Now, researchers have created a dataset which brings together national surveys from 74 countries, representing 3 million women. For the first time, it allows them to describe trends in demand/use of modern contraceptives alongside social and economic indicators.

    The data is published in The Lancet Global Health and is authored by the London School of Hygiene & Tropical Medicine and the World Health Organization.

    It shows that, over time, women are more likely to have their demand for modern contraception met in countries where gender equality and their educational opportunities improve.

    Gender equality and education increases access to modern contraception

    Trends in sexual activity and demand for use and use of modern contraceptive methods in 74 countries: a retrospective analysis of nationally representative surveys finds that met need for modern contraception is strongly correlated with positive shifts in social structures.
    For every 0.1-point increase in a country’s gender development index, it found a 6.7% rise in women who were sexually active and did not want to conceive. Of those women, an additional 13.5% used modern methods to prevent a pregnancy.

    Expectations of every girl’s right to education also made a difference. Each extra year in schooling is linked to an increase of 2.3% in demand, and a 4.7% increase in use of modern contraceptive methods.

    “This study shows how every woman must negotiate her reproductive autonomy within the social framework in which she lives, responding to barriers and opportunities as they emerge,” says Dr Lale Say, one of the authors of the study and Unit Head at WHO and HRP.

    “Gender equality is both a precondition and a driving force for securing women’s reproductive health and rights – as well as the sustainable development targets, which are our best chance for delivering health and well-being for all.”

    Global trends reveal new challenges in family planning

    Overall, the data reinforce global trends: more time spent sexually-active and single, postponement of parenthood, and the near-universal desire for smaller families.

    The study also highlights where action is needed at country-level to avoid family planning services falling behind demand.

    Out of the 74 countries analyzed, 42 showed an increase in demand for contraception. Only 37 countries show an increase in use of a modern method to prevent pregnancy.

    Although unmet need for contraception declined in 34 countries, it increased in 14 countries. Significantly more progress is needed, and faster, to ensure each girl and woman is able to access the sexual and reproductive health services she needs.

    Barriers and solutions to reproductive health and rights

    Gender equality can affect contraceptive use in many ways. From the personal and political degree to which women are free to choose their sexual activity, to accessing family planning services it can also shape any power imbalances within personal relationships. This study supports recent efforts by WHO to adopt a broader, integrated concept of sexual and reproductive health – and to translate it into a framework for policy and practice.

    The authors argue that family planning targets in the 2030 Agenda for Sustainable Development will not be met without a profound shift: from focus on ‘access to contraception’, to broader aspects of sexual health and social context.

    Since reproductive health and women’s empowerment are intertwined, trends in contraceptive use can also reveal progress towards another global target: progress towards gender equality.

     

    The unmet need for social context in family planning
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    https://www.who.int/news-room/detail/10-03-2020-the-unmet-need-for-social-context-in-family-planning

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  • Fueling a cleaner future for transport

    Fueling a cleaner future for transport

    A simple, fast and inexpensive method for modeling the combustion characteristics of gasoline has been developed by KAUST researchers, paving the way for cleaner and more efficient transport fuels.

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  • Innovative method improves safety in lithium-sulfur batteries

    Innovative method improves safety in lithium-sulfur batteries

    Researchers from A*STAR’s NanoBio Lab (NBL) have designed a semi-solid electrolyte for lithium-sulfur batteries that improves their safety without compromising their performance. This promising breakthrough paves the way for lithium-sulfur batteries to be used as efficient power solutions across diverse electronic and energy storage applications.

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  • Discovery of accurate and far more efficient algorithm for point set registration problems

    Discovery of accurate and far more efficient algorithm for point set registration problems

    A point set registration problem is a task using two shapes, each consisting of a set of points, to estimate the relationship of individual points between the two shapes. Here, a “shape” is like a human body or face, which is similar to another body or face but exhibits morphological diversity. Taking the face as an example: the center position of the pupil of an eye varies depending on individuals but can be thought to have a correspondence with that of another person. Such a correspondence can be estimated by gradually deforming one shape to be superimposable on the other. Estimation of the correspondence of a point on one shape to a point on another is the point set registration problem. Since the number of points of one shape could be millions, estimation of correspondence is calculated by a computer. Nonetheless, up to now, even when the fastest conventional method was used, it took a lot of time for calculation for registration of ca. 100,000 points. Thus, algorithms that could find a solution far faster without affecting accuracy have been sought. Furthermore, preliminary registration before automated estimation was a prerequisite for the conventional calculation method, so algorithms that do not need preliminary registration are desirable.

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  • The unfoldable bridge

    The unfoldable bridge

    There are many different methods for erecting bridges—but the new technique developed by TU Wien, the balanced lowering method, is quite spectacular: the bridge is not built horizontally, as would normally be case, but erected in a vertical position and then rotated into the horizontal position. The first large scale tests were carried out in 2010; since then, the method has been refined and tuned until finally finding its first application by the ASFINAG for two bridges of the Fürstenfeld Motorway S7. With the erection process successfully completed for the Lahnbach Bridge, the 116 m long bridge over the Lafnitz was “unfolded” on the 27th of February 2020. With no scaffolding needed, this new bridge construction method not only saves time but also money and resources.

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  • A current map for improving circuit design

    A current map for improving circuit design

    A practical method for mapping the flow of a current in devices with complex geometries that could be used to optimize circuit design has been developed at KAUST.

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