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POS 데이터를 이용한 일별 물가지수의 측정:일본의 UTokyo 일별 물가지수를 중심으로
정태훈 통계청 2016 통계연구 Vol.- No.특별호
This paper discusses the development of price index based on big data by introducing the UTokyo Daily Price Index in Japan. The UTokyo Daily Price Index is a daily price index developed by UTokyo Daily Price Project based on pont of sale (POS) data. This paper first explains how Nikkei-UTokyo Daily Price Index is constructed and then presents analyses regarding the measurement. The analyses indicated that changes in inflation rate based on POS data was generally low compared to those based on CPI (consumer price index) reported by the Ministry of Internal Affairs & Communications(MIC) in Japan: In the period of 1 April 1989 to 31 December 2015, the average differences between inflation rate based on POS data and CPI by the MIC in Japan was -0.95%. Assuming that a price index based on POS data reflects more accurate information of actual consumption, this suggests that monetary policy should be implemented in a more conservative manner. In reality, however, the analysis of monetary policy by the Bank of Japan in the period of 1990 to 2015 reveals that there existed several incidents suggesting this was not the case. Operation of monetary policy should be based on more accurate information of price and this finding suggests that utilizing big data such as POS data to measure price can beneficial and should be strongly considered. 오늘날 물가를 측정할 수 있는 엄청난 데이터가 매 순간 쏟아져 나오고 있다. 그 대표적인 것이소비자들이 슈퍼마켓이나 백화점 등에서 물건을 구매할 때 얻게 되는 POS(point of sale) 데이터(혹은 scanner data)이다. 본고의 목적은 일본의 POS 데이터를 이용하여 작성되는 UTokyo 일별물가지수(UTokyo Daily Price Index)에 대한 소개이다. UTokyo 일별 물가지수를 계측하는 과정에대한 상세한 설명을 하고, 이러한 과정을 통하여 나온 측정 결과를 분석하였다. 그 결과, POS 데이터를 이용하여 작성한 물가상승률은 총무성의 소비자물가지수 상승률보다 대체적으로 낮게 나타난다는 것을 알았다. POS 데이터를 이용하여 1989년 4월 1일부터 2015년 12월 31일까지의월별 물가지수 상승률을 계산한 뒤 총무성의 소비자물가지수 상승률을 뺀 값의 평균은 –0.95% 정도였다. POS 데이터를 이용한 물가상승률이 물가에 대한 정확한 정보라고 한다면, 통화정책의운영을 더욱 더 보수적으로 운영해야 한다. 실제로 1990년부터 2015년까지 일본은행의 정책들을 분석한 결과, POS 데이터를 이용한 물가상승률 기준으로 보았을 때, 올바른 방향의 통화정책을 운영해 왔다고 말하기 어려운 사건들이 여러 번 있었다. 이는 통화정책을 운영함에 있어서물가에 대한 정확한 정보가 매우 중요하다는 것을 의미하고, POS 데이터와 같은 빅데이터를 적극적으로 활용해야 한다는 시사점을 던져준다.
丁泰勳,鄭聖洙,李圭寶,黃基錫 慶北大學校 醫科大學 1978 慶北醫大誌 Vol.19 No.2
著者들은 1975年 5月부터 1977年 12月까지 慶北醫大附屬病院에 入院한 4例의 原發性骨髓機維症을 臨床血液學的으로 觀察한 바 다음과 같이 要約할 수 있었다. 1. 男女比는 同一하였으며 年齡은 10代에서 2例 30代에서 2例로서 比較的 젊은 年齡層에 屬하였다. 2. 主訴는 全身無力感, 鼻出血, 腹部腫瘤等이 었으며 첫 症狀이 發現한 후 診斷時까지의 期間은 1個月부터 4年사이였다. 3. 初診當時 全例에서 輕度부터 中等度으 肝腫(1∼4橫指), 輕度부터 高度의 脾中(1∼10橫指)이있었다. 骨髓穿剌는 모두 dry tap로 끝났으며 骨髓生檢에서 비로소 纖維症을 全例에서 證明할 수 있었다. 4. 全例에서 貧血이 있었으며 自由球數는 減少 도는 增加하였고 血小板數는 正常 또는 減少되었다. 全例에서 淚適狀赤血球를 볼 수 있었으며 3例에서 赤芽球 및 末熟白血球가 나타났다. 5. 全例에서 durabolin 및 myleran으로써 治療하였으나 多少 效果가 있었다. 6. 4 例中 2例에서는 確診후 1個月 및 4個月 후에 各各 死亡했으며 1例는 行方不明, 그리고 나머지 1例는 繼積加療中이다. The authors observed four patients with idiopathic myelofibrosis who had been admitted to Kyungpook National University Hospital between May 1975 and December 1977. the pertinent clinical results are as follows: 1) The male-to-female ratio was equal. Two patients were in the second decase and other two patients in the fourth decades. 2) The chief complaints were general weakness, epistaxis and adbominal masses. The intervals from the onset of the disease to the diagnosis were between one month and four years. 3) There were hepatomegaly(1-4f.b.) and also splenomegaly(1-10f.b.) in all patients at the time of their first visit to the Hospital. All marrow aspirations attempt resulted in dry tap and a diagnosis of myelofibrosis was proved only by menas of marrow biopsy in all patients. 4) anemia was seen in all patient on first admission. Leukopenia or leukocytosis and normal platelet count or thrombocytopenia were observed. Tear drop cells were noted uniformly in all patients. Normoblasts and immature leukocytes were seen on the peripheral blood in three patients. 5) All patients had been treated with durabolin and myleran with somewhat encouraging results. 6) Two out of four patents were expired within one month and four months respectively after a diagonsis was made. One patient was lost to follow-up and another patient is currently under treatment
정태훈,임진모,이덕래,Jeong, Tae-Hun,Im, Jin-Mo,Lee, Deok-Rae 한국섬유공학회 1995 한국섬유공학회지 Vol.32 No.12
This study were made on the air permeability of weft knitted fabrics using cotton yarn as raw materials. It is general assumption that the air permeability as weft knitted fabrics are resulted from the sum of two parts. The one is a nozzle part such as space among yarns in cotton knitted fabrics, and the other is a capillary part such as space among fibers in knitted yarn. Based on this assumption we had studied on the three basic weft knitted structures as plaint 1$\times$1 rib and interlock stitches in connection with air permeabilty. And we had made the regression equations between parameter A(nozzle part), B(capillary part) and air-permeability of cotton knitted fabrics by means of stepwise regression analysis. From the analysis, the f311owing results were obtained: Vupia, n) : 7.36639+203.03799A+371.05482B, Vunb)=26.27621+ 256.03855A+281.64791B, Vu, n‥‥1~k)= 56.51290+56.78075A+54.97715B, Vu, o, at)=28.807)6+214.90318A+71.51714B.
정태훈 한국공작기계학회 2002 한국공작기계학회 춘계학술대회논문집 Vol.2002 No.-
In press forming of sheet metals, the material sheet is usually subjected to very large plastic strain under in-plane stressing. Moreover, the sheet also very often is subjected to out-of-plane compressive force between tools such as the upper and lower dies, the blank holder and the die, and so forth. In this paper, it is clearly demonstrated theoretically that out-of-plane stress may notably raise the forming limit strain and thus it can be effectively utilized to avoid earlier fracture of the sheet in press forming.
정태훈 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-
In press forming of sheet metals, the material sheet is usually subjected to very large plastic strain under in-plane stressing. Moreover, the sheet also very often is subjected to out-of-plane compressive force between tools such as the upper and lower dies, the blank holder and the die, and so forth. In this paper, it is clearly demonstrated theoretically that out-of-plane stress may notably raise the forming limit strain and thus it can be effectively utilized to avoid earlier fracture of the sheet in press forming.