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.

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.

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.

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 $x_s$.

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.

Outline of the Reverse-rotational Rotary Tiller

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

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.

Smart Polymeric Micelles as Nanocarriers for Gene and Drug Delivery

Kazunori Kataoka 한국고분자학회 2006 한국고분자학회 학술대회 연구논문 초록집 Vol.2006 No.10

일본에서의 게임 관련의 법적 문제 -최근 판례 등을 중심으로-

토모유키카타오카 ( Kataoka Tomoyuki ) 중앙대학교 문화미디어엔터테인먼트법연구소 2016 문화.미디어.엔터테인먼트 법 Vol.10 No.1

1 현재, 일본의 게임 시장은, 스마트폰.태블릿용 등의 온라인 플랫폼으로 주류가 이동하는 가운데, 게임 관련 분쟁에 관한 판례도 상당수 여기저기 보이는 동시에, 그 밖의 법적 문제, 예를 들면, 게임 내 통화 등에 관한 자금결제법의 문제, 또 이른바‘컴플리트 가챠’에 관한 경품표시법의 문제 등이 보도되고 있다. 2 최근의 게임 관련 판례는 다기에 걸치며, 저작권을 문제로 하는 것이 다수를 차지하고 있으나, 그 외에도, 부정경쟁방지법 위반이 문제가 된 것, 초상권, 퍼블리시티권이 문제가 된 것, 업무위탁계약이 문제가 된 것, 게임 제작의 투자계약이 문제가 된것 등, 여러가지가 보인다. 3 게임 내 통화 등에 관한 자금결제법의 문제는, 유상으로 게임 내 통화를 발행할 경우에, 일정한 요건을 만족하면, 발행 보증금의 공탁을 의무화하는 등, 게임 사업자에게있어 경제적 부담을 수반하는 것이 된다. 4 또, ‘컴플리트 가챠’에 관한 경품표시법의 문제는, 게임 내에서 레어 아이템을 취득하기 위해 유저가 다수의 아이템을 구입하는 등 다액의 과금이 발생하는 문제가 많이 발생하여 사회 문제가 된 적도 있으며, 소비자청이, 일정한 경우에는 경품표시법상의 이른바 ‘카드 모으기(카드를 구입, 특정한 종류를 모으면 다른 경품과 교환할 수 있는 것)’의 금지에 위반한다고 하여 견해를 발표하는 동시에, 사업자 단체도 자주적으로 운용 가이드라인을 발표하고 있다. 5 게임업계는 서비스의 발전이 현저한 것도 있고, 향후에도 새로운 법적 문제가 발생될것이 예상되어, 각 법 영역의 기본적 생각을 토대로 하면서 타당한 해석을 해 나갈필요가 있다. 1 Recently, in the Japanese game market, the mainstream of its format is transferring from package game into online platform mainly for smart phones and tablet devices. Under these circumstances, we can easily find out many court cases on game contents, and furthermore, there have been many news coverages on, for instance, issues of Payment Services Act related to in-game currency and issues of Act against Unjustifiable Premiums and Misleading Representations related to so called “Comp-Gacha.” 2 There are various kind of recent court cases related to game contents, most of which are those related to copyrights; provided, however, that there are also other kind of cases including those on a) Unfair Competition Prevention Law, b) portrait rights and publicity rights, c) game production service agreements and d) investment agreement for game production. 3 With respect to issues on Payment Services Act related to in-game currency, in case of issuing in-game currency for compensation, the game company issuing it shall be, under certain conditions, obliged to set aside issuance security deposit, which may burden the company with heavy economic strain. 4 With respect to issues on Act against Unjustifiable Premiums and Misleading Representations related to so called “Comp-Gacha,” many social problems have occurred since users of a game content got many items in order to get a rare item(s) and those situations caused heavy charges to some users. Therefore, Consumer Affairs Agency issued a guideline in which it construed that, under certain circumstances, games including “Comp-Gacha” shall be regarded as breach of prohibition from so called “card combination” under Act against Unjustifiable Premiums and Misleading Representations, and furthermore, some game trade associations voluntarily made public their operational guidelines. 5 Since growth and advancement of game services is significant in the game industries, new legal issues thereon will arise in the future, under which adequate construing of related laws and regulations shall be requied in accordance with basic concepts on current laws and regulations.