Determination of Upwind and Downwind Areas of Seoul, Korea Using Trajectory Analysis

Oh, Hyun Sun; Ghim, Young Sung; Kim, Jin Young; Chang, Young-Soo

doi:10.5572/ajae.2010.4.2.089

Cited by 5 publications

(5 citation statements)

References 11 publications

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“…In Seoul, the wind speed is usually faster during the spring and winter than during other seasons. 13) Therefore, low ambient temperature with faster wind speed may increase the occurrence of ICH in this moderate climate area.…”

Section: Discussionmentioning

confidence: 97%

Age and Meteorological Factors in the Occurrence of Spontaneous Intracerebral Hemorrhage in a Metropolitan City

Kim

et al. 2014

J Cerebrovasc Endovasc Neurosurg

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ObjectiveThe aim of this study was to investigate the correlation between meteorological factors and occurrence of spontaneous intracerebral hemorrhage (ICH) according to age.Materials and MethodsWe retrospectively analyzed the records of 735 ICH patients in a metropolitan hospital-based population. Observed and expected numbers of ICH patients were obtained at 5℃ intervals of ambient temperature and a ratio of observed to expected frequency was then calculated. Changes in ambient temperature from the day before ICH onset day were observed. The Wilcoxon-Mann-Whitney test was used to test differences in meteorological variables between the onset and non-onset days. The Kruskal-Wallis test was used for comparison of meteorological variables across gender and age.ResultsICH was observed more frequently (observed/expected ratio ≥ 1) at lower mean, minimum, and maximum ambient temperature (p = 0.0002, 0.0003, and 0.0002, respectively). Significantly lower mean, minimum, and maximum ambient temperature, dew point temperature, wind speed, and atmospheric pressure (p = 0.0003, 0.0005, 0.0001, 0.0013, 0.0431, and 0.0453, respectively) was observed for days on which spontaneous ICH occurred. In the subgroup analysis, the ICH onset day showed significantly lower mean, minimum, and maximum ambient temperature, dew point temperature, relative humidity, and higher atmospheric pressure in the older (≥ 65 years) female group (p = 0.0093, 0.0077, 0.0165, 0.0028, 0.0055, and 0.0205, respectively).ConclusionOccurrence of spontaneous ICH is closely associated with meteorological factors and older females are more susceptible to lower ambient temperature.

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Section: Discussionmentioning

confidence: 97%

Age and Meteorological Factors in the Occurrence of Spontaneous Intracerebral Hemorrhage in a Metropolitan City

Kim

et al. 2014

J Cerebrovasc Endovasc Neurosurg

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“…Singular applications are the investigation of potential sources of odour problems [129], identifying upwind sources, which might affect air quality levels in Seoul, South Korea, and downwind areas affected by this city [130] or identifying sources from seven regions affecting two receptors in the eastern US [131].…”

Section: Common Air Pollutantsmentioning

confidence: 99%

Applications of Air Mass Trajectories

Pérez

Artuso

Mahmud

et al. 2015

Advances in Meteorology

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Air trajectory calculations are commonly found in a variety of atmospheric analyses. However, most of reported research usually focuses upon the transport of pollutants via trajectory routes and not on the trajectory itself. This paper explores the major areas of research in which air trajectory analyses are applied with an effort to gain deeper insights into the key points which highlight the necessity of such analyses. Ranging from meteorological applications to their links with living beings, air trajectory calculations become important tool especially when alternative procedures do not seem possible. This review covers the reports published during last few years illustrating the geographical distribution of trajectory applications and highlighting the regions where trajectory application research proves most active and useful. As a result, relatively unexplored areas such as microorganism transport are also included, suggesting the possible ways in which successful use of air trajectory research should be extended.

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“…A wind tunnel (SDA‐WT0300, Samduk Co., Republic of Korea), with a test section of 1 m × 0.5 m, was used to generate wind with speeds ranging from 0‐5 m/s and was measured using an anemometer that was placed parallel to the device. This range of wind speed is suitable for simulating the range of wind speed in Seoul (Oh et al , 2010). The induced AC voltage from the generator was converted to DC voltage through a simple bridge rectifier circuit.…”

Section: Experimental Set‐up For the Voltage Generating Testmentioning

confidence: 99%

Performance of multiple energy harvesting elements in a small‐scale windmill

Luong

Goo

2013

International Journal of Intelligent Unmanned Systems

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PurposeThe purpose of this paper is to investigate the characteristics of PCGEs used in a small‐scale windmill in terms of the number of PCGEs.Design/methodology/approachExperiments were performed in cases where one, two, or four PCGEs are attached to the frame of the windmill, with optimization of different gap distances between exciting and secondary magnets carried out to determine the optimal configuration for generating the peak voltage and harvesting the maximum wind energy for the same range of wind speeds.FindingsThe experimental results show that the prototype can harvest energy in urban regions with low wind speeds and convert the wasted wind energy into electricity for city use.Originality/valueThe experimental results show that the prototype can harvest energy in urban regions with low wind speeds and convert the wasted wind energy into electricity for city use.

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Determination of Upwind and Downwind Areas of Seoul, Korea Using Trajectory Analysis

Cited by 5 publications

References 11 publications

Age and Meteorological Factors in the Occurrence of Spontaneous Intracerebral Hemorrhage in a Metropolitan City

Age and Meteorological Factors in the Occurrence of Spontaneous Intracerebral Hemorrhage in a Metropolitan City

Applications of Air Mass Trajectories

Performance of multiple energy harvesting elements in a small‐scale windmill

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