• Explosives and Blasting
• /
• v.31 no.1
• /
• pp.87-92
• /
• 2013

Although precision blasting constructions are increased by explosive industry, the studies on the history of explosive are small in number. In this study, we tried to find the origin of explosive and make it, which we found, be storization to develop the technology of modern explosive and blasting. Also, we presented the methods that apply storytelling about the explosive technology to construction project.

• Proceedings of the Korean Institute of Intelligent Systems Conference
• /
• 1998.06a
• /
• pp.252-257
• /
• 1998

A method of multimedia information data acquisition based on fuzzy rules is proposed, where the multimedia means the five senses of a human being. Observed information is characterized by VAGOT(visual, acoustic, gustatory, olfactory and tactile) time series data and the goal is to extract an appropriate subset of the VAGOT data based on a given instruction. Fuzzy rules based on visual and acoustic information are used to identify the appropriate time interval on the fireworks multimedia information.

• Environmental Engineering Research
• /
• v.20 no.3
• /
• pp.260-267
• /
• 2015

The $PM_{10}$, $SO_2$ and $NO_2$ mass concentrations were obtained over five years from monitoring stations across Nanchong, a southwest city in China. Changes in urban air quality over time, as well as the factors influencing that change, were evaluated based on air pollutant concentrations, the Air Pollution Index (API), and the Comprehensive Pollution Index (P). The results showed that the total annual mean $PM_{10}$, $SO_2$ and $NO_2$ concentrations over the five years studied were $61.1{\pm}1.1$, $45.0{\pm}3.9$ and $34.9{\pm}4.9{\mu}g{\cdot}m^{-3}$, respectively. The annual mean concentrations displayed a generally decreasing trend; lower than the annual mean second-level air quality limit. Meanwhile, the annual mean API values were in a small range of 52-53, the air quality levels were grade II, and P values were 1.06-1.21 less than the slight level ($P{\leq}1.31$). Total monthly mean $PM_{10}$, $SO_2$, $NO_2$ concentrations, and API and P values were consistently higher in winter and spring than during autumn and summer. The results of a correlation analysis showed that temperature and pressure were the major meteorological factors influencing pollution levels. Pollution sources included industrial coal and straw burning, automobiles exhaust and road dust, fireworks, and dust storms.

• Journal of Korean Society on Water Environment
• /
• v.28 no.3
• /
• pp.460-466
• /
• 2012

Perchlorate is used in a number of applications as an oxidizer in solid propellants, munitions and fireworks and is one of the endocrine disrupting chemicals, which interferes with iodide uptake into the thyroid gland. The purpose of this study was to investigate perchlorate occurrence and distribution with a results of analysis of 94 samples collected from military facilities in Korea from October 11 to October 23, 2011. Overall, among all of the 94 samples analyzed, perchlorate was detected in 6.4% of the total number of samples above $4{\mu}g/L$ (minimum reported limit) and the average concentration was $26.1{\mu}g/L$ and the maximum concentration was $107.7{\mu}g/L$ which was observed in surface water near manufacturing site of ammunition. By site classification, perchlorate was detected at one site in 4 manufacturing sites of ammunition and the maximum concentration was $107.7{\mu}g/L$ which was six times higher than that in guideline for perchlorate in Nakdong River and resulted from point source discharge. Perchlorate was detected at 3 sites in 78 measurements for shooting area and the maximum concentration was $12.4{\mu}g/L$ which was collected in dringking water and perchlorate in another sample was detected above MRL in shooting area was collected right away after shooting. These results showed that long term monitoring was needed considering weather conditions and shooting schedules.

• School Mathematics
• /
• v.7 no.4
• /
• pp.445-467
• /
• 2005

The purpose of this study was to investigate mathematics teaching of an elementary school teacher and to understand the meaning of it. This study was a qualitative case study using by analyzing metaphors. The notion of metaphors was newly set up. Traditionally, it had been regarded as a mere tool for better understanding, but it was recognized as the primary source of all of our concept(Sfard, 1998). The subject of this case study was a researcher 'I' and also an elementary school teacher. The three selves named Mee1, Mee2, Mee3, respectively. Mee1 was the 'I' who developed the 4th graders' activities on mathematical patterns in 1996 and wrote mathematics textbook for the 4th graders in 1998-1999. Mee2 was the 'I' who taught mathematical patterns to her students in 2002. Mee3 was the 'I' who criticized the teaching of Mee2 in 2005. [ADVENTURE], [HIDE-AND-SEEK], and [FIREWORKS DISPLAY] were deter-mined to be key metaphors of mathematics teaching. [ADVENTURE] of Mee] was focused on profound understanding of mathematics, [HIDE-AND-SEEK] of Mee2 on construction of mathematics, and [FIRE-WORKS DISPLAY] of Mee3 on making meaning and participating in communities. Studies of metaphors give us the power of understanding mathematics teaching and also generate it. And viewing mathematics teaching via metaphors makes teaching studies open to new ways.

• Journal of English Language & Literature
• /
• v.55 no.4
• /
• pp.517-538
• /
• 2009

This study explores the possibility of finding intersections of commonness and differences between Mahasweta Devi's short stories, "The Hunt" and "Douloti the Bountiful" and Angela Carter's "Flesh and the Mirror" and "Master" in Fireworks. At appearance, Carter as a writer of Great Britains and Devi as a writer of India in postcolonial period do not seem to share any commonness. This study, however, tried to find "common differences," to quote Chandra Mohanty's terminology, as a basis of solidarity possible between these two different feminist writers. Another concept appropriated in this process of comparing Carter and Devi is Gayatri Spivak's 'planetary comparative literature,' which contends the necessity of critical regional studies and the study of Asian Literature in the study of English literature. Devi and Carter, despite their historical, geopolitical and racial differences, share commonness in depicting Asian or colonized women not only as the oppressed others but also as the subjects who show potential for resistance and independence. Carter portrays Japanese women as the colonized and oppressed others of Japanese society, even though Japan did not have any colonial history. Devi finds in the postcolonial Indian women both the oppressed in the interstice of colonial/postcolonial/patriarchal Indian history and the potential for resistance. Despite some limitation in her understanding of Asia, Carter shows her insight to accept Asia as a true origin of her self-knowledge and performativity of her woman's role. Despite their differences, these two writers use Freud's 'unheimlich' from the feminist point of view, in general. Devi's depiction of the heroine's dead body at the end of the story implicates the possibility of resistance through women's 'uncanny' bodies. Carter converts Freudian and negative connotation of woman's body into positive and comfortable 'home' as a starting point of her self knowledge.