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Duan G, Takemi T, Ngan K. Evaluation of pollutant exposure using virtual walkers and large-eddy simulation: Application to an idealised urban neighbourhood. Sci Total Environ 2023; 877:162640. [PMID: 36921850 DOI: 10.1016/j.scitotenv.2023.162640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 02/07/2023] [Accepted: 03/01/2023] [Indexed: 05/06/2023]
Abstract
Urban air quality studies have primarily focused on pollutant dispersion; however, spatial or temporal concentrations collected at discretely distributed grid points (or fixed receptors) do not reflect the actual pollutant exposure of pedestrians. Using large-eddy simulation (LES) with virtual walkers implemented, this study investigates pollutant exposure of walking agents (or moving receptors) in an urban turbulent boundary-layer flow developed over an aligned building array under the influence of different wind directions. The spatial variability of the exposure risks are found to be better captured by the moving receptors than the fixed receptors along the same agent walking tracks. We demonstrate that the actual exposure can differ significantly from results interpreted from data recorded by the fixed receptors (corresponding to Eulerian estimates) and show that large discrepancies occur in avenues near the source, wherein dispersion of the point release has not occurred on larger spatiotemporal scales. In most scenarios, optimal evacuation routes are shown to be ones that deviate as much as possible from the dominant wind direction; however, one needs to decide the priority of moving to further avenues first or immediately adjusting the walking direction. The results should serve as a useful baseline reference for environmental health impact assessment and evacuation route planning against hazardous releases of air pollutants in more complex urban environments.
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Affiliation(s)
- G Duan
- Navigation College, Dalian Maritime University, Dalian, PR China; State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology Dalian, PR China.
| | - T Takemi
- Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan
| | - K Ngan
- Institute of Ocean and Earth Sciences, University of Malaya, Kuala Lumpur, Malaysia
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Nakayama H, Takemi T, Nagai H. Large-eddy simulation of turbulent winds during the Fukushima Daiichi Nuclear Power Plant accident by coupling with a meso-scale meteorological simulation model. Adv Sci Res 2015. [DOI: 10.5194/asr-12-127-2015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Abstract. A significant amount of radioactive material was accidentally discharged into the atmosphere from the Fukushima Dai-ichi Nuclear Power Plant from 12 March 2011, which produced high contaminated areas over a wide region in Japan. In conducting regional-scale atmospheric dispersion simulations, the computer-based nuclear emergency response system WSPEEDI-II developed by Japan Atomic Energy Agency was used. Because this system is driven by a meso-scale meteorological (MM) model, it is difficult to reproduce small-scale wind fluctuations due to the effects of local terrain variability and buildings within a nuclear facility that are not explicitly represented in MM models. In this study, we propose a computational approach to couple an LES-based CFD model with a MM model for detailed simulations of turbulent winds with buoyancy effects under real meteorological conditions using turbulent inflow technique. Compared to the simple measurement data, especially, the 10 min averaged wind directions of the LES differ by more than 30 degrees during some period of time. However, distribution patterns of wind speeds, directions, and potential temperature are similar to the MM data. This implies that our coupling technique has potential performance to provide detailed data on contaminated area in the nuclear accidents.
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Abstract
Abstract. Contaminant gas dispersion in atmospheric boundary layer is of great concern to public health. For the accurate prediction of the dispersion problem, the present study numerically investigates the behavior of plume dispersion by taking into account the atmospheric stability which is classified into three types; neutral, stable, and convective boundary layers. We first proposed an efficient method to generate spatially-developing, thermally-stratified boundary layers and examined the usefulness of our approach by comparing to wind tunnel experimental data for various thermal boundary layers. The spreads of plume in the spanwise direction are quantitatively underestimated especially at large downwind distances from the point source, owing to the underestimation of turbulence intensities for the spanwise component; however, the dependence of the spanwise spreads to atmospheric stability is well represented in a qualitative sense. It was shown that the large-eddy simulation (LES) model provides physically reasonable results.
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Takemi T, Kimura T, Unaki A, Okayasu H. The recent trends of the change of risk factors with stroke patients at the hospital in Central Tokyo. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Yuki N, Odaka M, Koga M, Takemi T, Hirata K, Kuwabara S. Bickerstaff's brainstem encephalitis: clinical features of 62 cases and a subgroup associated with Guillain-Barre syndrome. Am J Ophthalmol 2004. [DOI: 10.1016/j.ajo.2003.11.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Abstract
Hypercalcemia is one of the metabolic complications associated with cancer. To assess the frequency of hypercalcemia in patients with squamous cell carcinoma (SCC), 242 patients who were evaluated as having SCC in the oral cavity between July 1995 and June 2001 were investigated. All patients were periodically monitored for their serum level of calcium (Ca). Hypercalcemia was defined as a serum Ca concentration higher than 11 mg/dl. By this definition, hypercalcemia was detected in 12 of the 242 patients (5.0%). All 12 patients were at an advanced stage of oral SCC. In these 12 patients, the serum level of parathyroid hormone-related protein (PTH-rP) was also significantly elevated. Therefore, we diagnosed these diseases as humoral hypercalcemia of malignancy (HHM). Moreover, we studied the efficacy of anti-hypercalcemic therapy on the quality of life (QOL). The European Organization for Research and Treatment of Cancer (EORTC) QLQ-C30 was used for estimation of QOL. The patients with HHM who were administrated drugs such as bisphosphonate and calcitonin showed a reduction in their Ca and PTH-rP levels, and the six of ten EORTC QLQ-C30 subscales (emotional functioning, cognitive functioning, fatigue, dyspnoea, nausea/vomiting and appetite loss) were also improved after the anti-hypercalcemic therapy. However, these suppressive effects were temporary. The median survival time after the diagnosis of HHM was only 54.9+/-18.3 days (range 27-86 days). Therefore, HHM in SCC appears to be an ominous prognostic sign. Although anti-hypercalcemic therapy has a palliative role, the patients may be in less discomfort during the terminal stage of their illness.
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Affiliation(s)
- M Iwase
- Second Department of Oral and Maxillofacial Surgery, School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ota-ku, Tokyo 145-8515, Japan.
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Takemi T. Remembrances of the war and the bomb. JAMA 1983; 250:618-9. [PMID: 6345828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Takemi T. [Impact on medical and nursing services. The aging society and social solidarity]. Kango Gijutsu 1983; 29:149-54. [PMID: 6551478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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9
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Takemi T. Characteristics of man in a life cycle in the development and allocation of medical care resources. World Med J 1981; 28:93-6. [PMID: 10254001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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10
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Takemi T. The welfare state and medical ethics. Med J Aust 1972; 1 Suppl 7:65-7. [PMID: 4679846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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11
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Takemi T. [Medical policy of the world and Japan]. Nihon Ishikai Zasshi 1972; 67:1141-5. [PMID: 5064772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Takemi T. [Revision of the National Health Insurance system in 1972]. Nihon Ishikai Zasshi 1972; 67:775-9. [PMID: 5062839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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13
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Takemi T. [Ideal of medical sciences]. Nihon Ishikai Zasshi 1971; 66:518-20. [PMID: 5165602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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14
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Takemi T. [Future of social insurance in Japan]. Nihon Ishikai Zasshi 1971; 66:515-7. [PMID: 4940297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Takemi T. [Reasons for my resigning the post of a member physician in the national health insurance system]. Nihon Ishikai Zasshi 1971; 66:205-9. [PMID: 5107132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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16
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Takemi T. [Address by Dr. Takemi, President of the Japan Medical Association at the 1st meeting of the Committee on Classification of Hospitals]. Nihon Ishikai Zasshi 1971; 65:1452-3. [PMID: 5104733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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17
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Takemi T. [Basic outline of the revised medical fee system]. Nihon Ishikai Zasshi 1971; 65:1447-51. [PMID: 5104732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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18
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Takemi T. [Supply and distribution of physicians and medical schools]. Nihon Ishikai Zasshi 1971; 65:1291-5. [PMID: 5104290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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19
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Takemi T. [Obstacles in establishing the radical revision of the health insurance law]. Nihon Ishikai Zasshi 1971; 65:691-700. [PMID: 5102337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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20
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Takemi T. [Medical insurance of the welfare state]. Nihon Ishikai Zasshi 1971; 65:332-41. [PMID: 5101423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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21
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Takemi T. [Problems in medical care in 1971--3 fundamental basis of medical care]. Nihon Ishikai Zasshi 1971; 65:232-6. [PMID: 5101417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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22
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Takemi T. [Ideal attitude of the physician]. Nihon Ishikai Zasshi 1971; 65:229-31. [PMID: 5101416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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23
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Takemi T. [Progress in medicine and medical ethics]. Nihon Ishikai Zasshi 1971; 65:1-3. [PMID: 5101302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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24
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Takemi T. [Disparity in the field of medical education in Japan]. Nihon Ishikai Zasshi 1970; 64:853-7. [PMID: 5529413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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25
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Takemi T. [Environmental pollution and ecological science]. Nihon Ishikai Zasshi 1970; 64:641-5. [PMID: 5466011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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26
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Takemi T. [Security for the comfortable old age--importance of social planning]. Nihon Ishikai Zasshi 1970; 64:646-50. [PMID: 5466012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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27
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Takemi T. [Basic problems in public health measures]. Nihon Ishikai Zasshi 1970; 64:533-7. [PMID: 5466753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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28
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Takemi T. [Establishment of a medical support system]. Nihon Ishikai Zasshi 1970; 64:538-42. [PMID: 5466007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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29
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Takemi T. [State medicine and drugs]. Nihon Ishikai Zasshi 1970; 64:375-9. [PMID: 5465786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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30
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Takemi T. [Pan-pacific and Asian Conference on medical education]. Nihon Ishikai Zasshi 1970; 64:259-63. [PMID: 5465306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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31
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Takemi T. [Welfare state and medical ethics]. Nihon Ishikai Zasshi 1970; 63:1395-7. [PMID: 5464940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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32
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Takemi T. [General practitioners in Japan]. Nihon Ishikai Zasshi 1970; 63:1329-39. [PMID: 5465026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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33
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Takemi T. [Revised plan of medical education]. Nihon Ishikai Zasshi 1970; 63:1126-30. [PMID: 5463463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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34
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Takemi T. [Freedom in medical practice]. Nihon Ishikai Zasshi 1970; 63:870-4. [PMID: 5463008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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35
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Takemi T. [Japanese system of medical care and physicians' ethics]. Nihon Ishikai Zasshi 1970; 63:759-763. [PMID: 5462881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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36
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Takemi T. [Present status of a reform bill for medical care system in Japan]. Nihon Ishikai Zasshi 1969; 62:971-5. [PMID: 5389571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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37
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Takemi T. [Medical legislation in Japan]. Nihon Ishikai Zasshi 1969; 62:793-802. [PMID: 5389303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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38
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Takemi T. [Creative development in medical care]. Nihon Ishikai Zasshi 1969; 62:719-23. [PMID: 5389684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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39
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Takemi T. [Reformation of medical care]. Nihon Ishikai Zasshi 1969; 62:460-4. [PMID: 5390373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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40
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Takemi T. [Medical care in Europe]. Nihon Ishikai Zasshi 1969; 62:349-54. [PMID: 5390369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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41
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Takemi T. [Crisis of hospitals and its countermeasures]. Nihon Ishikai Zasshi 1969; 61:1405-14. [PMID: 5817434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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42
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Takemi T. [Progress of medical legislation]. Nihon Ishikai Zasshi 1969; 61:1297-1301. [PMID: 5817737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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Takemi T. [Outline of the Liberal-Democratic Party's policy concerning medical care]. Nihon Ishikai Zasshi 1969; 61:1162-7. [PMID: 5817218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Takemi T. [Medical education and medical system in Japan]. Nihon Ishikai Zasshi 1969; 61:917-27. [PMID: 4896552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Takemi T. [Association of medicine with pharmacology--with special reference to the social aspects]. Nihon Ishikai Zasshi 1969; 61:745-9. [PMID: 5816245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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46
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Takemi T. [Present and future of medical insurance in the United States]. Nihon Ishikai Zasshi 1969; 61:639-43. [PMID: 4890865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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47
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Takemi T. [Medical problems discussed at the Diet]. Nihon Ishikai Zasshi 1969; 61:521-5. [PMID: 5814667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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48
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Takemi T. [Organization of local community hospitals]. Nihon Ishikai Zasshi 1969; 61:526-32. [PMID: 5814668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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49
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Takemi T. [New concept of medical education]. Nihon Ishikai Zasshi 1969; 61:458-462. [PMID: 5814619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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Matsuo M, Takemi T. [Problems regarding public medical facilities]. Nihon Ishikai Zasshi 1969; 61:153-8. [PMID: 5813214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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