782 research outputs found

    Hubungan Lingkar Pinggang Dengan Frekuensi Napas Pada Guru SMP Kristen Eben Haezar 1, 2, Dan SMA Kristen Eben Haezar Manado

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    : Waist circumference is a simple method of measuring abdominal fat, which encompasses visceral and subcutaneous fat. Excessive abdominal fat in people with large waist circumference can compress the chest wall and diaphragm mechanically causing an inability of the lungs to expand optimally, which results in shallow and rapid breathing pattern. Teachers are among the high-risk groups to experience an increase in the waist circumference due to the sedentary work pattern. This was an observational study with a cross-sectional design. This study was aimed to obtain the correlation between waist circumference and respiratory rate in teachers. The results showed that there were 84 teachers of Eben Haezar Christian Junior High School 1, 2, and Eben Haezar Christian Senior High School Manado as subjects. Measurements of waist circumference and respiratry rate were performed on all subjects. It was found that the mean waist circumference of female teachers was 89.04 cm meanwhile of male teachers was 92.31 cm. The mean respiratory rate was 21 breaths per minute. The Pearson Bivariate Correlation statistic test showed that there was a significant positive moderate correlation between waist circumference and respiratory rate (r = 0.493; p < 0.05)

    Status Resistensi Vektor Filariasis Asal Kabupaten Sikka terhadap Insektisida Permethrin

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    Pengendalian nyamuk yang berperan sebagai vektor&nbsp; merupakan tindakan terpenting dalam penanggulangan penyakit seperti filariasis.Filariasis merupakan penyakit menular yang disebabkan oleh cacing filaria yang menyerang saluran dan kelen­jar getah Bening yang ditularkan oleh berba­gai jenis nyamuk. Kasus filariasis di Kabupaten Sikka tahun 2015- 2017 setiap tahunnya meningkat. Penggunaan insektisida menjadi pilihan utama masyarakat dalam pengendalian vektor nyamuk. Insektisida yang digunakan secara terus-menerus dapat menyebabkan nyamuk menjadi resisten. Penelitian ini bertujuan untuk mengetahui status resistensi vektor filariasis terhadap insektisida permethrin 0,75%&nbsp; di Kabupaten Sikka tahun 2018. Penelitian ini diawali dengan survei lokasi dan pengambilan sampel di Kabupaten Sikka dan dilanjutkan dengan pemeliharaan nyamuk serta uji resistensi. Bahan yang digunakan dalam penelitian ini adalah nyamuk Aedes sp. dan Anopheles sp., impregnated paper permethrin 0,75%.&nbsp; Hasil uji resistensi menggunakan metode susceptibility test dengan impregnated paper permethrin 0,75% adalah kematian nyamuk uji terhadap permethrin adalah 21,3% sehingga disimpulkan bahwa vektor filariasis di Kabupaten Sikka dinyatakan telah resisten tinggi terhadap insektisida permethrin 0,75% karena kematian nyamuk uji &lt;90%

    From Multi-Sensors Observations Towards Cross-Disciplinary Study of Pre-Earthquake Signals. What have We Learned from the Tohoku Earthquake?

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    The lessons we have learned from the Great Tohoku EQ (Japan, 2011) how this knowledge will affect our future observation and analysis is the main focus of this presentation.We present multi-sensors observations and multidisciplinary research in our investigation of phenomena preceding major earthquakes. These observations revealed the existence of atmospheric and ionospheric phenomena occurring prior to theM9.0 Tohoku earthquake of March 11, 2011, which indicates s new evidence of a distinct coupling between the lithosphere and atmosphere/ionosphere, as related to underlying tectonic activity. Similar results have been reported before the catastrophic events in Chile (M8.8, 2010), Italy (M6.3, 2009) and Sumatra (M9.3, 2004). For the Tohoku earthquake, our analysis shows a synergy between several independent observations characterizing the state of the lithosphere /atmosphere coupling several days before the onset of the earthquakes, namely: (i) Foreshock sequence change (rate, space and time); (ii) Outgoing Long wave Radiation (OLR) measured at the top of the atmosphere; and (iii) Anomalous variations of ionospheric parameters revealed by multi-sensors observations. We are presenting a cross-disciplinary analysis of the observed pre-earthquake anomalies and will discuss current research in the detection of these signals in Japan. We expect that our analysis will shed light on the underlying physics of pre-earthquake signals associated with some of the largest earthquake event

    Self-Assembly of Supramolecular Triblock Copolymer Complexes

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    Four different poly(tert-butoxystyrene)-b-polystyrene-b-poly(4-vinylpyridine) (PtBOS-b-PS-b-P4VP) linear triblock copolymers, with the P4VP weight fraction varying from 0.08 to 0.39, were synthesized via sequential anionic polymerization. The values of the unknown interaction parameters between styrene and tert-butoxystyrene and between tert-butoxystyrene and 4-vinylpyridine were determined from random copolymer blend miscibility studies and found to satisfy 0.031<χS,tBOS<0.034 and 0.39<χ4VP,tBOS<0.43, the latter being slightly larger than the known 0.30<χS,4VP≤0.35 value range. All triblock copolymers synthesized adopted a P4VP/PS core/shell cylindrical self-assembled morphology. From these four triblock copolymers supramolecular complexes were prepared by hydrogen bonding a stoichiometric amount of pentadecylphenol (PDP) to the P4VP blocks. Three of these complexes formed a triple lamellar ordered state with additional short length scale ordering inside the P4VP(PDP) layers. The self-assembled state of the supramolecular complex based on the triblock copolymer with the largest fraction of P4VP consisted of alternating layers of PtBOS and P4VP(PDP) layers with PS cylinders inside the latter layers. The difference in morphology between the triblock copolymers and the supramolecular complexes is due to two effects: (i) a change in effective composition and, (ii) a reduction in interfacial tension between the PS and P4VP containing domains. The small angle X-ray scattering patterns of the supramolecules systems are very temperature sensitive. A striking feature is the disappearance of the first order scattering peak of the triple lamellar state in certain temperature intervals, while the higher order peaks (including the third order) remain. This is argued to be due to the thermal sensitivity of the hydrogen bonding and thus directly related to the very nature of these systems.

    Power Laws, Precursors and Predictability During Failure

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    We investigate the dynamics of a modified Burridge-Knopoff model by introducing a dissipative term to mimic the bursts of acoustic emission (AE) from rock samples. The model explains many features of the statistics of AE signals observed in experiments such as the crossover in the exponent value from relatively small amplitude AE signals to larger regime, and their dependence on the pulling speed. Significantly, we find that the cumulative energy dissipated identified with acoustic emission can be used to predict a major slip event. We also find a data collapse of the acoustic activity for several major slip events describable by a universal stretched exponential with corrections in terms of time-to-failure.Comment: 7 pages, 6 figures, Final version with minor change

    Field and chirality effects on electrochemical charge transfer rates: Spin dependent electrochemistry

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    This work examines whether electrochemical redox reactions are sensitive to the electron spin orientation by examining the effects of magnetic field and molecular chirality on the charge transfer process. The working electrode is either a ferromagnetic nickel film or a nickel film that is coated with an ultrathin (5\u201330 nm) gold overlayer. The electrode is coated with a self-assembled monolayer that immobilizes a redox couple containing chiral molecular units, either the redox active dye toluidine blue O with a chiral cysteine linking unit or cytochrome c. By varying the direction of magnetization of the nickel, toward or away from the adsorbed layer, we demonstrate that the electrochemical current depends on the orientation of the electrons\u2019 spin. In the case of cytochrome c, the spin selectivity of the reduction is extremely high, namely, the reduction occurs mainly with electrons having their spin-aligned antiparallel to their velocity

    In situ, real-time visualization of electrochemistry using magnetic resonance imaging

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    The drive to develop better electrochemical energy storage devices requires the development of not only new materials, but also better understanding of the underpinning chemical and dynamical processes within such devices during operation, for which new analytical techniques are required. Currently, there are few techniques that can probe local composition and transport in the electrolyte during battery operation. In this paper, we report a novel application of magnetic resonance imaging (MRI) for probing electrochemical processes in a model electrochemical cell. Using MRI, the transport and zinc and oxygen electrochemistry in an alkaline electrolyte, typical of that found in zinc-air batteries, are investigated. Magnetic resonance relaxation maps of the electrolyte are used to visualize the chemical composition and electrochemical processes occurring during discharge in this model metal-air battery. Such experiments will be useful in the development of new energy storage/conversion devices, as well as other electrochemical technologies

    Bloch oscillations of magnetic solitons in anisotropic spin-1/2 chains

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    We study the quantum dynamics of soliton-like domain walls in anisotropic spin-1/2 chains in the presence of magnetic fields. In the absence of fields, domain walls form a Bloch band of delocalized quantum states while a static field applied along the easy axis localizes them into Wannier wave packets and causes them to execute Bloch oscillations, i.e. the domain walls oscillate along the chain with a finite Bloch frequency and amplitude. In the presence of the field, the Bloch band, with a continuum of extended states, breaks up into the Wannier-Zeeman ladder -- a discrete set of equally spaced energy levels. We calculate the dynamical structure factor in the one-soliton sector at finite frequency, wave vector, and temperature, and find sharp peaks at frequencies which are integer multiples of the Bloch frequency. We further calculate the uniform magnetic susceptibility and find that it too exhibits peaks at the Bloch frequency. We identify several candidate materials where these Bloch oscillations should be observable, for example, via neutron scattering measurements. For the particular compound CoCl_2.2H_2O we estimate the Bloch amplitude to be on the order of a few lattice constants, and the Bloch frequency on the order of 100 GHz for magnetic fields in the Tesla range and at temperatures of about 18 Kelvin.Comment: 31 single-spaced REVTeX pages, including 7 figures embedded with eps

    Digital Humanities: Community Participation in the Balinese Language Digital Dictionary

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    In recent years, the capability of Balinese people to write and speak their mother tongue has declined significantly among the younger generations because of the growing influence and adoption of the national language, Bahasa Indonesia.&nbsp; It has spread rapidly among Balinese youth because it is considerably more straightforward than the Balinese language and is free of caste regulations.&nbsp; In this paper, we present the details of our digital humanities preservation research dealing with the Balinese language.&nbsp; We utilize community-based crowdsourcing to participate in expanding and enriching the BASABali Wiki digital dictionary in the form of an online competition. Ninety-six participants in 24 groups participated in our study, and their contribution populated 2686 new unique sentences to the BASABali Wiki digital dictionary. We also discuss the procedures employed to evaluate the digital dictionary: to receive feedback on the digital dictionary system and our approach to acquiring the knowledge of the community
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