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 $x_s$.

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

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.

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.

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.

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.

地域ブランド形成プロセスを考える: 壱岐燒酎の實態調査から

片岡一郎 ( Kataoka Ichiro ),片山富弘 ( Katayama Tomihiro ) 경남대학교 산업경영연구소 2010 지역산업연구 Vol.33 No.1

本論文は地域ブランドに關する主な先行硏究を行い、地域ブランドの展開を述べ、壱岐燒酎の實態調査から地域ブランド形成プロセス圖を提示している。これは、その地域における歷史性や文化性に根付いた、その商品に對するこだわりや品質が消費者ニ一ズに對應する形で地元貢獻につながり、やがて地元という地域だけでなく地域擴大というふうにスパイラル·アップした地域活性化への構圖である。 I propose that the formative process of Place-Brand through The IKI-Shouchu case study on this paper, with proceeding about Place-Brand studies, and the development of Place-Brand. It is based on history and culture of the Place, and the commodity on concern and quality matches to customer needs. Then it is the composition to place activation. In the first section, Marketing is important for place activation. For example, Product-strategy, Place-strategy and Event-strategy. And then rural marketing etc. In the second section, there are the eight proceeding studies about Place-Brand studies, on the survey result, I want to insist that place- resource must be transferred to customer-value. In the third section, as the development of Place-Brand, I take Place-Brand in management point of view, and that case in kyushuu, checklists of Place-Brand in control point of view. In the forth section, at the IKI-Shouchu case, the formative process of Place-Brand needs to innovator-analysis. In the final section, I get the composition to place activation. But, there are two questions on this paper. One is application to the composition to place activation in any case. One another is measurement to Place-Brand.

14~19세기 일본 학문의 특색과 그 변화 -아시카가(足利) 학교에서부터 고증학까지

가타오카류 ( Kataoka Ryu ) 다산학술문화재단 2009 다산학 Vol.- No.14

본 논문은 한국과의 비교를 염두에 두면서 일본 학문의 성격을 고찰하는 것을 과제로 한다. 동아시아 학문 역사 속에서 근대이전 일본과 한국은 동일하게 중국문화를 자양분으로 하면서도 서로 다른 궤적을 그리며 현대에 이르는 학문의 성격을 형성해 왔다고 보인다. 이러한 차이를 인식하고 이를 토대로 쌍방의 거리를 좁히는 것은 한일 학술교류를 한층 본격적인 단계로 이끌기 위한 서로의 과제이다. 이 차이는 주로 20세기 이후 서양 학술을 대하는 태도에 기인한다고 생각되는데, 본 논문에서는 14세기에서 19세기를 고찰 대상으로 한다. 그것은 당시의 중국문화를 대하는 태도 속에 상호간 차이의 유래와 서로의 거리를 좁힐 수 있는 가능성이 담겨있다고 생각하기 때문이다. 또한 본 논문에서 `학문`이라는 명칭을 사용하는 이유는 근대이전 동아시아 문화의 중핵에 있었던 것(당송이후 선종과 유학을 상정)의 성격이 `철학`이나 `사상`·`종교`보다는 고전과 선인에게 배우고 스승과 학우에게 질문하여 자신을 향상시켜간다는 의미를 지닌 `학문`에 가깝다고 보는 것이 실체에 입각한다고 생각하기 때문이다. 여기에는 중국·일본·한국이 서로 각자의 특색이 있지만 동아시아 학문을 전체적으로 봤을 때 어떠한 성격을 지닌 것이었는가를 고찰함으로써 이후 동아시아 인문학 존재방식의 탐색에 기여하려는 문제인식이 배경에 있다. 20세기 말부터 시작된 인문학의 급속한 쇠퇴는 경제문제·환경문제 등과 밀접하게 관계되는 전세계적인 문제로, 인문학만을 홀로 논하는 것은 문제가 있지만, 우선 고찰의 대상을 전근대로 한정함으로써 `근대`에 구속되지 않은 유연한 발상도 가능할 것이다. 과거가 어떠했는지 미래가 어떠할지는 어느 쪽도 직접 볼 수 있는 문제가 아니다. 더욱이 `학문` 혹은 `사상`이 두뇌 속에 서식하는 개념의 질서나 이념(때로는 정념)을 주된 대상으로 하는 이상, 어려움은 배가된다. 이 점이 논자가 `보이지 않는 것에 대한 상상력`을 불가결하게 생각하는 이유이다. 본 논문은 한국과의 비교를 염두에 두면서 14~19세기 일본 `학문` 성격의 형성과정을 고찰하였다. 우선 전제로서 근대이전 동아시아 문화의 중핵에 당·송 이후 선종과 유학이 존재했음을 상정하고, 선종은 깨달음의 경지 그 자체에 대한 표현에 중점을 두는 반면 유교의 경우는 깨달음에 이르는 단계의 실지성에 중점을 두는 점에서 다른 성격을 가지는데, 14세기 이후 동아시아 세계에서 패러다임으로써 널리 받아들여진 것은 선종과 유학이 복잡하게 얽히고설킨 구조체였음을 논하였다. 다음으로 중세 중반 학문 행위자로서 새로운 유형의 지식인이 등장하며 이들 학문의 특색이 `실용학`이었음을 아시카가 학교를 중심으로 고찰하였으며, 중세 말경에는 구 지식세계의 `시문학`과 `실용학`이 융합되어갔음을 논하였다. 마지막으로 16세기 말 조선 및 중국에서 대량의 서적이 일본으로 유입됨으로써 근세 학문 안에 `인격완성을 위한 학문`이라는 성격이 더해진 점, 또 대량의 서적을 소화하지 않으면 안 된다는 문제가 먼저 어떤 책을 읽어야 하는가라는 선택안을 중요시하게 한 점, 지식의 실천보다는 `독서`에 머무르는 경향이 생겨난 점, 서지학적 관심이 높아진 점 등에 대해 논하였다. This paper investigates the process of the formation of scholarship in Japan from 14th to 19th centuries with particular attention given to comparisons with Korea. As a premise for this study, I consider post-Tang/Song Zen and Confucian Studies as the core elements of pre-modern East Asian culture. Zen and Confucianism demonstrate a difference in character in that Zen lays emphasis on the state of Enlightenment itself while practicality of the process of achieving Enlightenment is given weight in Confucianism. However, I argue that it was this complex and involved structure which became the pervasive paradigm of the East Asian world from the 14th century onward. I go on to consider a new type of intellectuals who emerged as bearers of scholarly tradition in the mid-medieval period; they explored the notion of Practical Learning (jitsuyounogaku, 實用の學), which was the characteristic quality of their scholarship and the Ashikaga School as its centre. I argue that the end of the Middle Ages saw the start of a process of the commingling and fusing of Practical Learning with the Study of Poetics and Literature (shibunnogaku, 詩文の學) which was typical of the old intellectual world. Finally, this paper examines the way in which the import of large numbers of books from Korea and China at the end of the 16th century added a renewed aspect of the study of perfection of character (jinkakukanseino-gaku, 人格完成の學) to Early Modern scholarship, made significant as a result of the subsequent need for scholars to consume a large number of books; the process of selecting those books which ought to be read brought about a trend toward confining scholarship to the level of reading(dokusho, 讀書) on a subject rather than realization of knowledge. This led to heightened scholarly interest in bibliographic concerns.