8,688 research outputs found

    Astrophysical constraints on the proton-to-electron mass ratio with FAST

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    That the laws of physics are the same at all times and places throughout the Universe is one of the basic assumptions of physics. Astronomical observations provide the only means to test this basic assumption on cosmological time and distance scales. The possibility of variations in the dimensionless physical constant {\mu} - the proton-to-electron mass ratio, can be tested by comparing astronomical measurements of the rest frequency of certain spectral lines at radio wavelengths with laboratory determinations. Different types of molecular transitions have different dependencies on {\mu} and so observations of two or more spectral lines towards the same astronomical source can be used to test whether there is any evidence for either temporal or spatial changes in the physical fundamental constants. {\mu} will change if the relative strength of the strong nuclear force compared to the electromagnetic force varies. Theoretical studies have shown that the rotational transitions of some molecules which have transitions in the frequency range that will be covered by FAST (e.g., CH3OH, OH and CH) are sensitive to changes in {\mu}. A number of studies looking for possible variations in {\mu} have been undertaken with existing telescopes, however, the greater sensitivity of FAST means it will open new opportunities to significantly improve upon measurements made to date. In this paper, we discuss which molecular transitions and sources (both in the Galaxy and external galaxies) are likely targets for providing improved constraints on {\mu} with FAST

    Measurement of body temperature and heart rate for the development of healthcare system using IOT platform

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    Health can be define as a state of complete mental, physical and social well-being and not merely the absence of disease or infirmity according to the World Health Organization (WHO) [1]. Having a healthy body is the greatest blessing of life, hence healthcare is required to maintain or improve the health since the healthcare is the maintenance or improvement of health through the diagnosis, prevention, and treatment of injury, disease, illness, and other mental and physical impairments in human beings. The novel paradigm of Internet of Things (IoT) has the potential to transform modern healthcare and improve the well-being of entire society [2]. IoT is a concept aims to connec

    Becoming Taiwanese: Self-perception1 Of The New Taiwanese Immigrant Females

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    Southeast Asian and Chinese women have been marrying Taiwanese men since the 1980s. Nonetheless, cross-border marriages were not common until the 1990s, when the ″Go-South Policy″ was implemented. Unfortunately, these cross-border marriages have become commoditised. In addition, misperceptions broadcasted by the mass media have stigmatised these self-titled Taiwan new immigrant females (or TNIFs). This ethnographic research explores the self-perceptions of a particular group of TNIFs who have moved to Taiwan from urban regions in their homeland. Participant observation and in-depth interviews were employed to gather data, and these two sources of data were triangulated between one another. Research results indicate that many people came to Taiwan seeking a better life and not necessarily for economic reasons. However, their experiences in Taiwan have been largely unpleasant. Nevertheless, by working together with other TNIFs and Taiwanese people, they have come to call Taiwan their "home"

    Integrating phytoremediation with biomass valorisation and critical element recovery: A UK contaminated land perspective

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    In the UK, the widespread presence of elemental contaminants such as arsenic and nickel in contaminated sites and more widely release of platinum group metals into the biosphere are growing concerns. Phytoremediation has the potential to treat land contaminated with these elements at low cost. An integrated approach combining land remediation with post-process biomass to energy conversion and high value element recovery is proposed to enhance the financial viability of phytoremediation. An analytical review of plant species suitable for the phytoremediation of nickel, Arsenic and platinum group metals is reported. Additionally, a preliminary model is developed to assess the viability of the proposed approach. A feasibility appraisal using Monte Carlo simulation to analyse project risk suggests high biomass yield plant species can significantly increase the confidence of achieving financial return from the project. The order of financial return from recovering elements was found to be: Ni > Pt > As