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NORM CONVERGENCE OF THE LIE-TROTTER-KATO PRODUCT FORMULA AND IMAGINARY-TIME PATH INTEGRAL
Ichinose, Takashi Korean Mathematical Society 2001 대한수학회지 Vol.38 No.2
The unitary Lie-Trotter-Kato product formula gives in a simplest way a meaning to the Feynman path integral for the Schroding-er equation. In this note we want to survey some of recent results on the norm convergence of the selfadjoint Lie-Trotter Kato product formula for the Schrodinger operator -1/2Δ + V(x) and for the sum of two selfadjoint operators A and B. As one of the applications, a remark is mentioned about an approximation therewith to the fundamental solution for the imaginary-time Schrodinger equation.
A Brief History of Monetary Policy in Post-war Japan : Credit Squeezing and Foreign Exchange Policy
Ichinose, Atsushi 啓明大學校 産業經營硏究所 2002 經營經濟 Vol.35 No.1
일본 모모야마대학 Atsushi Inchinose 교수님이 발표한 A Brief History of Monetary policy in Post-wat Japan의 논문을 요약하며 다음과 같다. 첫째, 일본정부는 외환정책(외환통제정책과 환율정책)을 활용하여 경제성장을 달성 하려고 추구해왔다. 이러한 강제적인 외환정책으로 인하여 일본의 통화긴축정책은 그 시점이 5차례나 늦어지게 되었다. 이와 같이 지연된 통화정책 때문에 외부비경제, 저축가지의 감소 및 장기적인 불황이 초래되었다. 둘째, 고속성장기의 1970년대까지 일본의 통화정책은 국제수지연건에 의해 제약을 받아왔다. 예를 들어, 국제수지가 적자인 경우 일본은행은 공정할인율수단이나 신용재분수단을 통해 기축금융정책을 취해야 한다. 그러나 봅 논문의 주장에 의하면 국제 수지와 통화정책간의 관계만을 관찰하는 것은 불충분하다는 것이다. 즉, 전후 일본의 통화정책에서는 재무성의 외환통제와 외환보유고 정책이 고려되어야 한다는 것이다. 본 논문은 현재의 경제적 불황을 통화정책의 실패에서 찾으려는 흥미 있는 논문으로 평가된다. 즉 외환정책을 너무 강조한 나머지 긴축종화정책의 시기가 너무 늦게 이루어졌다는 것이다. 그러나 논평자는 다음과 같은 두 가지 보완점을 지적하고 싶다. 첫째 기본적으로 통화정책의 목표는 경제성장과 물가안정을 달성하는 것이다. 실제로 한 나라의 통화정책에 영향을 주는 요인들은 많다. 본 논문에서도 통화긴축시점별로 통화정책에 영향을 준 요인들을 보여주었다. 특히 1970년대 이후 많은 나라들이 금리위주의 통화정책을 시행해왔다. 예를 들어 단기금리의 조정을 통해 금융시장, 자산시장, 외환시장 및 시장참가자의 기대에 영향을 주면, 이를 통해 소비, 투자 그리고 수출입에 영향을 주어 최종적으로는 경제성장과 물가안정 등 통화정책의 목적을 달성할 수가 있는 것이다. 따라서 특정의 통화정책에 대한 원인을 규명하는 것은 매우 어렵다고 본다. 본 논문은 정부의 외환정책과 통화정책지연간의 관계를 찾으려고 시도하였다. 그러나 그 논리가 다소 불분명하다. 즉, 본 논문은 사후적 관계를 도축했을 뿐, 이론적(사전적)관계를 도출하는 데에는 한계가 있다. 둘째, 마찬가지로 실증분석을 위해서는 통계적인 유의수준을 활용하여 검정하는 것이 필요하다고 본다.
Surgery for acute abdomen in adult patients with severe motor and intellectual disabilities
Akinori Ichinose,Yuji Ishibashi,Fumihiko Hatao,Yasuhiro Morita 대한외과학회 2023 Annals of Surgical Treatment and Research(ASRT) Vol.104 No.4
Purpose: The present study aimed to examine the characteristics, outcomes, and problems related to surgery for acute abdomen in adult patients with severe motor and intellectual disabilities (MID). Methods: The clinical records of 35 adult patients with severe MID who received emergency surgery for acute abdomen between 2011 and 2020 were reviewed. Results: The median duration from onset to surgery was 48 hours. There were 2 cases of in-hospital mortality (5.7%), and all the patients underwent surgery more than 72 hours after onset. The in-hospital mortality rate was significantly higher in patients who received surgery later than 72 hours after onset. Bowel obstruction was the most common disease among the acute abdomen cases (71.4%) and most often involved volvulus of the small bowel and cecum. Of the patients with bowel obstruction with severe MID, 72.0% had abdominal distention, 16.0% had abdominal pain, and 4.0% had vomiting. The median duration from onset to surgery was significantly longer in the patients with bowel obstruction with severe MID than in those without severe MID (24 hours vs . 16 hours). Conclusion: Acute abdomen in patients with severe MID was often due to bowel obstruction caused by volvulus. Because patients with severe MID have few symptoms, they are susceptible to adverse surgical outcomes associated with a prolonged duration from onset to surgery.
An Induction Scheme of Fast Initiative-Evacuation Based on Social Graphs
Taiyo Ichinose,Tomoya Kawakami 한국정보처리학회 2022 Journal of information processing systems Vol.18 No.6
Early evacuations reduce the damage caused by catastrophic events such as terrorism, tsunamis, heavy rains,landslides, and river floods. However, even when warnings are issued, people do not easily evacuate duringthese events. To shorten the evacuation time, initiative-evacuation and its executors, initiative evacuees, arecrucial in inducing other evacuations. The initiative evacuees take the initiative in evacuating and call out totheir surroundings. This paper proposes a fast method to induce initiative-evacuation based on social graphs. The candidates are determined in descending order of the number of links for each person. The proposed methodwas evaluated through simulations. The simulation results showed a significant reduction in evacuation time.
Yuki Ichinose,Takafumi Nishimura,Minori Harada,Ryota Kashiwagi,Mikihiro Yamamoto,Yoshiteru Noutoshi,Kazuhiro Toyoda,Fumiko Taguchi,Daigo Takemoto,Hidenori Matsui 한국식물병리학회 2020 Plant Pathology Journal Vol.36 No.2
Pseudomonas syringae pv. tabaci 6605 has two mul- tidrug resistance (MDR) efflux pump transporters, MexAB-OprM and MexEF-OprN. To understand the role of these MDR efflux pumps in virulence, we generated deletion mutants, ∆mexB, ∆mexF, and ∆mexB∆mexF, and investigated their sensitivity to plant-derived antimicrobial compounds, antibiotics, and virulence. Growth inhibition assays with KB soft agar plate showed that growth of the wild-type (WT) was inhibited by 5 μl of 1 M catechol and 1 M coumarin but not by other plant-derived potential antimicrobial compounds tested including phytoalexins. The sensitiv- ity to these compounds tended to increase in ∆mexB and ∆mexB∆mexF mutants. The ∆mexB∆mexF mutant was also sensitive to 2 M acetovanillone. The mexAB- oprM was constitutively expressed, and activated in the ∆mexF and ∆mexB∆mexF mutant strains. The swarming and swimming motilities were impaired in ∆mexF and ∆mexB∆mexF mutants. The flood inocula- tion test indicated that bacterial populations in all mu- tant strains were significantly lower than that of WT, although all mutants and WT caused similar disease symptoms. These results indicate that MexAB-OprM extrudes plant-derived catechol, acetovanillone, or cou- marin, and contributes to bacterial virulence. Further- more, MexAB-OprM and MexEF-OprN complemented each other’s functions to some extent.