A Method of Single-hop Connection between Mobile User Terminals Using a Through Repeater GEO Mobile Satellite

Kataoka, Nobuyuki,Ebina, Kazuhito,Ueba, Masazumi 통신위성우주산업연구회 2001 Joint Conference on Satellite Communications Vol.2001 No.-

In conventional geostationary mobile satellite communication systems, users may experience bad quality of service due to a large propagation delay, which is caused by the double-hop connection link. In a double-hop link, a signal is passed through the satellite twice and the base station once before reaching its destination. To reduce the propagation delay, it is necessary to have single-hop connection link that connects user terminals directly by passing through the satellite only once. The single-hop connection method proposed in this paper uses a through repeater satellite to which future services can be accommodated. The method uses a newly developed common control channel to send the signaling messages to users during the single-hop connection. We evaluate its performance and show its feasibility.

Non-Randomized Confirmatory Trial of Laparoscopy-Assisted Total Gastrectomy and Proximal Gastrectomy with Nodal Dissection for Clinical Stage I Gastric Cancer: Japan Clinical Oncology Group Study JCOG1401

Kataoka, Kozo,Katai, Hitoshi,Mizusawa, Junki,Katayama, Hiroshi,Nakamura, Kenichi,Morita, Shinji,Yoshikawa, Takaki,Ito, Seiji,Kinoshita, Takahiro,Fukagawa, Takeo,Sasako, Mitsuru The Korean Gastric Cancer Association 2016 Journal of gastric cancer Vol.16 No.2

Several prospective studies on laparoscopy-assisted distal gastrectomy for early gastric cancer have been initiated, but no prospective study evaluating laparoscopy-assisted total gastrectomy or laparoscopy-assisted proximal gastrectomy has been completed to date. A non-randomized confirmatory trial was commenced in April 2015 to evaluate the safety of laparoscopy-assisted total gastrectomy and laparoscopy-assisted proximal gastrectomy for clinical stage I gastric cancer. A total of 245 patients will be accrued from 42 Japanese institutions over 3 years. The primary endpoint is the proportion of patients with anastomotic leakage. The secondary endpoints are overall survival, relapse-free survival, proportion of patients with completed laparoscopy-assisted total gastrectomy or laparoscopy-assisted proximal gastrectomy, proportion of patients with conversion to open surgery, adverse events, and short-term clinical outcomes. The UMIN Clinical Trials Registry number is UMIN000017155.

Clinical impact of C-reactive protein to albumin ratio of the 7th postoperative day on prognosis after laparoscopic colorectal cancer surgery

Kataoka Masahiro,Gomi Kuniyuki,Ichioka Ken,Iguchi Takuya,Shirota Tomoki,Makino Arano,Shimada Ko,Maruyama Kiyotomi,Mihara Motohiro,Kajikawa Shoji 대한대장항문학회 2023 Annals of Coloproctolgy Vol.39 No.4

Purpose: C-reactive protein to albumin ratio (CAR) has been utilized as a prognostic factor in various carcinomas. We investigated the relationship between preoperative, postoperative day (POD) 1, and POD 7 CARs and the prognosis of patients with colorectal cancer (CRC). Methods: Three hundred twenty patients with CRC who underwent laparoscopic radical resection between May 2011 and December 2016 were enrolled. Patients were selected into 2 groups, high CAR and low CAR (72 patients per group), based on preoperative, POD 1, and POD 7 CARs. The relapse-free survival (RFS) and overall survival (OS) were compared between groups using propensity score matching. Results: The high CAR group had a significantly worse RFS (P<0.001) and OS (P=0.002) at POD 7 than those in the low CAR group. However, in preoperative and POD 1 analysis, no differences were observed. Conclusion: In patients with CRC, CAR of POD 7 was a significant prognostic factor.

Outline of the Reverse-rotational Rotary Tiller

KATAOKA, Takashi 한국농업기계학회 1999 바이오시스템공학 Vol.24 No.1

Association between periodontal bacteria and degenerative aortic stenosis: a pilot study

Kataoka, Akihisa,Katagiri, Sayaka,Kawashima, Hideyuki,Nagura, Fukuko,Nara, Yugo,Hioki, Hirofumi,Nakashima, Makoto,Sasaki, Naoki,Hatasa, Masahiro,Maekawa, Shogo,Ohsugi, Yujin,Shiba, Takahiko,Watanabe, Korean Academy of Periodontology 2021 Journal of Periodontal & Implant Science Vol.51 No.4

Purpose: Although several reports have described the relationship between periodontal disease and cardiovascular disease, information about the association between periodontal disease and the progression of degenerative aortic stenosis (AS) is lacking. Therefore, we performed a retrospective, single-center, pilot study to provide insight into this potential association. Methods: Data from 45 consecutive patients (19 men; median age, 83 years) with mild or moderate degenerative aortic stenosis were analyzed for a mean observation period of 3.3±1.9 years. The total amount of Aggregatibacter actinomycetemcomitans and Porphyromonas gingivalis and titers of serum immunoglobulin G (IgG) against periodontal bacteria and high-sensitivity C-reactive protein (hs-CRP) were evaluated. Aortic valve area (AVA), maximal velocity (Vmax), mean pressure gradient (mean PG), and the Doppler velocity index (DVI) were evaluated. The change in each parameter per year ([Parameter_LATEST-Parameter_BASELINE]/Follow-up Years) was calculated from the retrospective follow-up echocardiographic data (baseline vs. the most recently collected data [latest]). Results: No correlation was found between the concentration of periodontopathic bacteria in the saliva and AS status/progression. The anti-P. gingivalis antibody titer in the serum showed a significant positive correlation with AVA and DVI. Additionally, there was a negative correlation between the anti-P. gingivalis IgG antibody titer and mean PG. The hs-CRP concentration showed positive correlations with Vmax and mean PG. Meanwhile, a negative correlation was observed between the anti-P. gingivalis IgG antibody titer and ΔAVA/year and Δmean PG/year. The hs-CRP concentration showed positive correlations with Vmax and mean PG, and it was significantly higher in patients with rapid aortic stenosis progression (ΔAVA/year <-0.1) than in their counterparts. Conclusions: Our results suggest that periodontopathic bacteria such as A. actinomycetemcomitans and P. gingivalis are not directly related to the status/progression of degenerative AS. However, inflammation and a lower immune response may be associated with disease progression.

Numerical flow computation around aeroelastic 3D square cylinder using inflow turbulence

Kataoka, Hiroto,Mizuno, Minoru Techno-Press 2002 Wind and Structures, An International Journal (WAS Vol.5 No.2

Numerical flow computations around an aeroelastic 3D square cylinder immersed in the turbulent boundary layer are shown. Present computational code can be characterized by three numerical aspects which are 1) the method of artificial compressibility is adopted for the incompressible flow computations, 2) the domain decomposition technique is used to get better grid point distributions, and 3) to achieve the conservation law both in time and space when the flow is computed a with moving and transformed grid, the time derivatives of metrics are evaluated using the time-and-space volume. To provide time-dependant inflow boundary conditions satisfying prescribed time-averaged velocity profiles, a convenient way for generating inflow turbulence is proposed. The square cylinder is modeled as a 4-lumped-mass system and it vibrates with two-degree of freedom of heaving motion. Those blocks which surround the cylinder are deformed according to the cylinder's motion. Vigorous oscillations occur as the vortex shedding frequency approaches cylinder's natural frequencies.

Surface Treatment of Eggshells with Low-Energy Electron Beam

Kataoka, Noriaki,Kawahara, Daigo,Sekiguchi, Masayuki The Korean Association for Radiation Protection 2021 방사선방어학회지 Vol.46 No.1

Background: Salmonella enteritidis (SE) was the main cause of the pandemic of foodborne salmonellosis. The surface of eggs' shells can be contaminated with this bacterium; however, washing them with sodium hypochlorite solution not only reduces their flavor but also heavily impacts the environment. An alternative to this is surface sterilization using low-energy electron beam. It is known that irradiation with 1 kGy resulted in a significant 3.9 log reduction (reduction factor of 10,000) in detectable SE on the shell. FAO/IAEA/WHO indicates irradiation of any food commodity up to an overall average dose of 10 kGy presents no toxicological hazard. On the other hand, the Food and Drug Administration has deemed a dose of up to 3 kGy is allowable for eggs. However, the maximum dose permitted to be absorbed by an edible part (i.e., internal dose) is 0.1 Gy in Japan and 0.5 Gy in European Union. Materials and Methods: The electron beam (EB) depth dose distribution in the eggshell was calculated by the Monte Carlo method. The internal dose was also estimated by Monte Carlo simulation and experimentation. Results and Discussion: The EB depth dose distribution for the eggshells indicated that acceleration voltages between 80 and 200 kV were optimal for eggshell sterilization. It was also found that acceleration voltages between 80 and 150 kV were suitable for reducing the internal dose to ≤ 0.10 Gy. Conclusion: The optimum irradiative conditions for sterilizing only eggshells with an EB were between 80 and 150 kV.

Comparison of Three Magnet Array-type Rotors in Surface Permanent Magnet-type Vernier Motor

Kataoka, Yasuhiro,Takayama, Masakazu,Matsushima, Yoshitarou,Anazawa, Yoshihisa Journal of International Conference on Electrical 2013 Journal of international Conference on Electrical Vol.2 No.1

Surface permanent magnet-type vernier motors with three magnet array-type rotors (parallel magnetized type, repulsion type, and Halbach type) are compared based on the pull-out torque. It was clarified that increasing the rotor radius increases the pull-out torque at a fixed three-phase alternating voltage. The mechanism for the pull-out torque increase on each magnet array type was different, when the effects of the increase were analyzed based on an induced electromotive force and a synchronous reactance. As a result, the design of the Halbach-type rotor was found to be especially effective for achieving high pull-out torque, because this array type achieves a large induced electromotive force $E_0$ and a small synchronous reactance $x_s$.

Development of therapeutic Human monoclonal antibodies using KM mice

Shiro Kataoka 한국생물공학회 2008 한국생물공학회 학술대회 Vol.2008 No.4

日本でのエンタテインメント施設及びスポ一ツ施設の開發-土地に關する法的問題を中心に-

片岡朋行 ( Kataoka Tomoyuki ) 건국대학교 법학연구소 2015 일감부동산법학 Vol.10 No.-

본 연구는 일본에서의 엔터테인먼트시설의 및 스포츠시설의 실제 사례들을 소개하고, 이와 관련하여 대규모 엔터테인먼트·스포츠 복합시설의 개발계획의 기초가 되는 토지이용에 관한 법적문제를 중심으로 토지이용규제제도인 이른바 `마을만들기3법`과 일본의 토지임대차법인차지차가법을 소개하는 것을 목적으로 한다. 개발의 실사례에 관하여서는 엔터테인먼트시설과 스포츠시설로 나누어 기존의 시설과 개발 중의 시설을 소개하고, 그 중 최근 일본 국회에서 엔터테인먼트 시설 문제로서 논의되고 있는 카지노 추진법안에 대하여 법안의 내용과 이에 따른 문제점을 다양한 각도에서 검토한다. 스포츠시설과 관련한 법적 쟁점으로는 2011년 제정된 스포츠기본법을 토대로 그 내용을 소개하고, 문제점을 검토한다. 토지의 이용과 관련한 법적문제점에 대하여는 일본의 공법상토지이용규제제도로서 이른바 `마을만들기 3법`에 의한 규제를 살펴보고, 개정의 경위와 변화에 의한 영향 등을 소개한다. 또한, 토지이용의 권원과 관련하여서는 일본의 계약제도의 토대가 되는 토지임대차법인 차지차가법을 소개한다. 차지차가법상의 정기차지권의 3종류인 일반정기차지권, 사업용정기차지권 그리고 건물양도특약부차지권의 내용을 소개하고 3가지 정기차지권의 활용실태를 살펴본다. 本硏究は日本でのエンタ一テインメント施設及びスポ一ツ施設の實事例を紹介し、これに關する大規模エンタ一テインメント·スポ一ツ複合施設の開發計畵の基礎となる土地利用に關する法的問題を中心に土地利用規制制度であるいわゆる「まちづくり三法」と日本の土地賃貸借法である借地借家法を紹介することを目的とする。開發の實事例に關してはエンタ一テインメント施設とスポ一ツ施設に分け旣存の施設と開發中の施設を紹介し、其の中で最近日本國會でエンタ一テインメント施設問題として議論されるカジノ推進法案について、その內容ともたらされる問題点を多樣な角度から檢討する。スポ一ツ施設に關連する法的爭点としては2011年に制定された「スポ一ツ基本法」の內容を紹介し、問題点を檢討する。土地の利用に關する法的問題点に對しては、日本の公法上土地利用規制制度としていわゆる「まちづくり三法」による規制を紹介し、改定の經緯かつ變化による影響を檢討する。また、土地利用の權限に關しては日本の契約制度の踏まえになる土地賃貸借法である借地借家法を紹介する。借地借家法上の定期借地權の3種類である一般借地權、事業用借地權及び建物讓渡特約付借地權の內容を紹介し、この三つの定期借地權の活用實態を檢討する。