http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Ginn (검색결과 116 건)
- 무료
- 기관 내 무료
- 유료
-
World Output and Commodity Price Cycles
Ginn William 한국국제경제학회 2023 International Economic Journal Vol.37 No.4
This study investigates the cyclical patterns of energy, agriculture, and metals and minerals (MetMin) commodity prices. We identify three super cycles since 1960, and a potential fourth arising from the Ukraine crisis and global COVID-19 pandemic. Employing a Structural Vector Autoregression (SVAR) approach, we establish an empirical relationship between output, CPI, and commodity prices. Our analysis reveals that an output shock leads to a general increase in all commodity prices, where the highest impact is on energy inflation. Moreover, we examine the heterogeneous effects of commodity inflation on overall inflation, uncovering ‘second round’ effects across all commodities. Notably, agriculture inflation has the most significant impact on aggregate inflation, potentially explaining the destabilizing nature of food inflation in many countries. Our findings enhance understanding of these dynamics, offering important insights for policymakers and informing the public.
-
Dynamical study on the blasting with one-free-face to utilize AN-FO explosives
Ginn Huh(許塡) 대한자원환경지질학회 1972 자원환경지질 Vol.5 No.4
發破에 있어서 穿孔配置는 發破效果에 影響을 미치는 가장 重要한 要素中의 하나다. Burn-cut의 爆發의 여러 要素에 關한 硏究는 Brown, Cook에 依해 發表된 바 있으나 本硏究에 있어서는 Burn-cut 와 Pyramid-cut의 穿孔配置의 對比외 爆源과 自由面사이의 力學的 應力解析에 重點을 두어 伊藤敎授가 展開한 理論에서 다루지 않은 適正穿孔配置에 依한 Burn-cut의 效果를 連結시켰다. 從來의 理論에 依하면 單一 自由面發破에 있어서는 壓縮應力外에 自由面에서 反射되는 引張應力의 影響을 追加로 받는다. 本 新穿孔 配置에 依한 Burn-cut는 自由面數의 增加와 距離의 縮少를 꾀하므로서 이效果는 더욱 增大된다. 이와 같은 效果를 爲해서는 다음 두가지 點을 고려해야 한다. 첫째 心拔孔의 無裝藥孔은 補助應力을 크게 하기爲해 可能한 大口徑으로 깊게 穿孔해야 한다. 둘째 각 心拔孔間의 距離를 接近시켜 完全 發破를 期해야 한다. 그 까닭은 口徑이 增加됨에 따라 2次 自由面은 넓어지고 거리가 가까울수록 裝藥孔과 無裝樂孔 사이의 引張應力은 더욱 發達되기 때문이다. 先進國에서는 心拔孔사이의 距離를 4”로 함이 理想的이라고 알려지고 있으나 本實驗에 依하면 더욱 近接될수록 破壤岩石이 增加되고 掘進長도 깊어짐이 밝혀졌다. 나아가서는 掘進長을 더욱 增大시키기 爲해 Burn-cut로 부터 Large hole Burn-cut를 開發하여 發破回數 max 7回/日로서 1發破當 3.1m까지 試圖함으로서 高速度掘進의 起源을 마련했다. 또한 大口徑 Burn-cut에서는 큰 抵抗을 극복하기 위해 金屬硝油爆藥을 使用함이 더욱 效果的임이 立證됐다. 最近에 와서 低廉한 價格과 取扱安全으로 각광을 받고있는 AN-FO는 비료용 또는 工業用 硝安에 燃料油를 混合한 것으로서 雷管만으로는 鈍感하여 爆發하지 않으나 Gelatin Dynamite 等의 爆發性 銳感劑에 依해 發破孔內에서 일단 起爆되면 從來의 硝安爆藥에 相當한 威力을 發揮케 한다 AN-FO 爆劑의 性能에 關해서는 많은 報告가 있었으나 本 實驗에 依하면 硝油混合比는 粉狀은 93.5:6.5, prill 狀은 94:6이 最適이며 粉狀 AN-FO는 prill 狀 AN-FO보다 恒常 爆速이 높다. 또한 起爆感度, 衝擊感度, 摩擦感度 等 諸感度는 他火藥에 比해 몹시 鈍感하며 傳爆性은 prill 狀이 粉狀보다 優秀함을 얻었다. 發破後 Gas도 良好하며 AN-FO는 製造後 7日 前後가 最大效果를 갖는다. 從來 AN-FO는 지난 여러해 동안 露天掘에만 使用하여 왔으나 筆者는 AN-FO의 基礎性能試驗을 土臺로 이를 利用한 新種爆劑로서 金屬硝油爆藥과 水中爆藥을 發展시켰다. 金屬硝油의 爆藥은 AN-FO와 Al 金屬粉말의 混合物이며 水中爆藥은 從來爆藥과 AN-FO로 製造한 바 이에 關해서는 다른 論文에 記述했다. 本 硏究에 있어서는 單一自由面 發破에 있어서 硝油爆藥類를 使用한바 그 效果가 매우 良好하였음을 確認하였다. Drilling position is one of the most important factors affecting on the blasting effects. There has been many reports on several blasting factors of burn-cut by Messrs. Brown and Cook, but in this study the author tried to compare drilling positions of barn-cut to pyramid-cut, and also to correlate burn-cut effects of drilling patterns, not being dealt by Prof. Ito in his theory, which emphasized on dynamical stress analysis between explosion and free face. According to former theories, there break out additional tensile stress reflected at the free face supplemented to primary compressive stress on the blasting with one-free-face. But with these experimented new drilling patterns of burn-cut, more free faces and nearer distance of each drilling holes make blasting effects greater than any other methods. To promote the above explosive effect rationary, it has to be considered two important categories under-mentioned. First, unloaded hole in the key holes should be drilled in wider diameter possibly so that it breaks out greater stress relief. Second, key holes possibly should have closer distances each other to result clean blasting. These two important factors derived from experiments with, theories of that the larger the dia. of the unloaded hole, it can be allow ed wider secondary free faces and closes distances of each holes make more developed stress relief, between loaded and unloaded holes. It was suggested that most ideal distance between holes is about 4 clearance in U.S.A., but the author, according to the experiments, it results that the less distance allow, the more effective blasting with increased broken, rock volume and longer drifted length can be accomplished. Developed large hole burn-cut method aimed to increase drifting length technically under the above considerations, and progressive success resulted to achieve maximum 7 blasting cycles per day with 3.1m drifting length per cycle. This achievement originated high-speed-drifting works, and it was also proven that application of Metallic AN-FO on large hole burn-cut method overcomes resistance of one-free-face. AN-FP which was favored with low price and safety handling is industrial Ammonium-Nitrate and fuel oil, and it is also experienced that it shows insensible property before the initiation, but once it is initiated by the booster, it has equal explosive power of Ammonium Nitrate Explosives (ANE). There was many reports about AN-FO. On AN-FO mixing ration, according to these experiments, prowdered AN-FO, 93.5 : 6.5 and prilled AN-FO 94:6, are the best ratios. Detonation, shock, and friction sensities are all more insensitive than any other explosives. Residual gas is not toxic, too. On initation and propagation of the detonation test, prilled AN-FO is more effective than powered AN-FO. AN-FO has the best explosion power at 7 days elapsed after it has mixed. While AN-FO was used at open pit in past years prior to other c new improved explosives, Metallic AN-FO and Underwater explosive, based on the experiments of these fundmental characteristics by study on its usage utilizing AN-FO. Metallic AN-FO is the mixture of AN-FO and Al, Fe-Si powder, and Underwater explosive is made from usual explosive and AN-FO. The explanations about them are described in the other paper. In this study, it is confirmed that the blasting effects of utilizing AN-FO explosives are very good.
-
-
-
-
-
-
-
-
ScienceON연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
