R-Curve Behavior of Silicon Nitride at Elevated Temperatures

Sakaguchi, Shuji The Korean Ceramic Society 1998 The Korean journal of ceramics Vol.4 No.4

R-curve, of three kinds of silicon nitride-based ceramics were measured, using single edge notched beam (SENB) method at room and at elevated temperatures, up to $1200^{\circ}C$. Stable fraacture was seen on ceramic materials with SENB specimens if the machined notch is deep enough, even though the crack resistance did not increase with crack length. Hot pressed silicon nitride did not show the rising R-curve behavior at room temperature, but it showed some rising at $1000^{\circ}C$ and above. Si3N4 reinforced with SiC whiskers showed no rising behavior at room and elevated temperatures, as it has smaller grain size, compare to the monolithic specimen. Gas pressure sintered silicon nitride had very large and elongated grains, and it showed rising R-curve even at room temperature. However, it showed some creep behavior at $1200^{\circ}C$ and the calculated R-curve on this condition did not show a good result. We cannot apply this technique on this condition for obtaining the R-curve.

Consideration about Resident Participation Activities for Maintenance and Use OPen Space with Community Development in Hachioji New Town

Sakaguchi, Jiro The Korean Institute of Landscape Architecture 2001 Journal of the Korean institute of landscape archi Vol.1 No.-

Maintenance open spaces and community development in large scale housing development is one of the most important issues. We(UDC) established a resident participation activity for maintenance and use open space with community development in Hachioji New Town from 1997. The purpose of this study is to establish resident participation activities for maintenance and use open space with community development in Hajichioji New Town, and to clarify the characteristics and to on sider about efficiency of the activity. We established Minamino Shizen-Juku as a methodology for maintenance and use open spaces at the same time Hachioji New Town was opened in 1997. The activity has continued by now in 2001. We conducted questionnaire survey to make sure efficiency and characteristics of the activity past three years. Minamino Shizen-Juku (nature friendly lessons) is a resident participation activity in Hachioji New Town. It was established in 1997 as soon as the new town was opened, this year is fifth since it was started. It has three objects. 1)Maintenance and use woody environment, 2) Community development, 3) Continuation and renewal native culture. And it has general course, three special courses and one extra course were established in the activity. 1) General course is an activity participated all of member. It's included farming experience in the native field and seasonal events. 2) Rice growing and woods maintenance course is rice growing and wild wood maintenance in the park as a series of annual farming activities. 3) Benefaction from farm course is started from planting spring vegetable at Mizukoshi(Leader of Minamino Shezen-Juku)'s field. There is the number of participant limit because of the area of the field. 4) Watching nature course is watching seasonal wild flowers, trees, animals and plants to know about native nature. 5) Extra program is programmed to know about native history and tradition. It's planned including participant's ideas. Not member can participate in this course too.

学習者主体の作文授業-自分に向き合い、自分を表現する授業の実践報告-

Sakaguchi Sayaka 한국일본언어문화학회 2015 일본언어문화 Vol.30 No.-

This article presents a practical report about the composition classes for the Korean learners of Japanese who were engaged in job hunting. These classes provided the learners with the opportunities to reflect upon themselves and express their positive characteristics and strong points in Japanese through several activities such as the writing of job application forms. The present study conducted a questionnaire test (including a self-reflection description) in 3 classes, targeting the 57 learners in total, who have studied Japanese around 6 years. These surveys revealed the following points. First, there were several learners who had not reflect upon themselves in a systematic manner, and the classroom activities were particularly significant for these learners. Second, the activities positively changed the learners’ attitudes towards their future careers. An essay was assigned to each learner at the end of the course, and the analysis of these essays submitted indicates that self-awareness was observed at the meta-level in the one-third of the learners. Based on these findings, it is concluded that the present attempt has contributed to the deepening of self-examination of the learners. Further, it is suggested that in organizing a class, an important role is played by the interplay amongst learners as well as the interplay between learners and the people surrounding them (such as family members and friends).

連体修飾形指示表現にみられる例示指示と唯一指示

Sakaguchi Sayaka 한국일본언어문화학회 2016 일본언어문화 Vol.36 No.-

. A comprehensive account of the adnominal demonstrative expressions of contemporary Japanese has not been developed in the literature. In this article, we will address the six groups of adnominal demonstrative expressions, and reveal their functional differences through quantitative and qualitative analyses. The expressions of the kono-group refer to an entity or a single category (“unique reference”) and do not have the illustrative function of implicitly referring to other entities as an example of referents. Our analyses indicate that the expressions in the non-kono-groups are commonly characterized in that they exhibit illustrative reference but that they differ in terms of the manner of illustrative reference, the strength of illustrative reference, etc. The function of illustrative reference is especially tied to the konoyouna-group, the koushita-group, and the kouitta-group. The expressions in these groups do not have the function of unique reference. The expressions in the konoyouna-group illustratively refer to approximate referents. On the other, the expressions in the kouitta-group are associated with representative illustrations. The konna-group and the kouiu-group display both the function of illustrative reference and that of unique reference. The expressions in the konna-group tend to refer to unique entities when inherent and specific objects are referred to. Further, in the case of the cataphoric use, they may refer to unique entities when the content of referents (linguistic information) is presented sufficiently and non-excessively. Unique reference in the case of the cataphoric use is also observed in the expressions in the kouiu-group.

Semiclassical analysis of M2-brane in AdS4×S7/Z k

Sakaguchi, Makoto,Shin, Hyeonjoon,Yoshida, Kentaroh Springer-Verlag 2010 Journal of high energy physics Vol.2010 No.12

Non-doped and unsorted single-walled carbon nanotubes as carrier-selective, transparent, and conductive electrode for perovskite solar cells

Sakaguchi, Takahiro,Jeon, Il,Chiba, Takaaki,Shawky, Ahmed,Xiang, Rong,Chiashi, Shohei,Kauppinen, Esko I.,Park, Nam-Gyu,Matsuo, Yutaka,Maruyama, Shigeo Cambridge University Press (Materials Research Soc 2018 MRS Communications Vol.8 No.3

<▼1><B>Abstract</B><P/></▼1><▼2><P>Lead halide perovskite solar cells (PSCs) with a structure of glass/FTO/TiO2/CH3NH3PbI3 with single-walled carbon nanotubes (SWNT) as the transparent top electrodes, followed by polymethyl methacrylate (PMMA) over-coating were fabricated. The SWNT-based PSCs do not require expensive metal electrodes and hole-transporting materials yet produce a decent power conversion efficiency of 11.8%, owing to the densifying effect of SWNTs by PMMA. The resulting devices demonstrate reduced hysteresis, improved stability, and increased power conversion efficiency.</P></▼2>

Where, When, and How mmWave is Used in 5G and Beyond

SAKAGUCHI, Kei,HAUSTEIN, Thomas,BARBAROSSA, Sergio,STRINATI, Emilio Calvanese,CLEMENTE, Antonio,DESTINO, Giuseppe,PÄ,RSSINEN, Aarno,KIM, Ilgyu,CHUNG, Heesang,KIM, Junhyeong,KEUSGEN, Wilhelm,WEILER 'Institute of Electronics, Information and Communi 2017 IEICE transactions on electronics Vol.100 No.10

コンナ類とコノヨウナ類の指示用法の違いについて -文脈指示の属性用法と内容用法を中心に-

Sakaguchi Sayaka 한국일어일문학회 2015 日語日文學硏究 Vol.95 No.1

There is a wealth of previous studies on adnominal demonstrative expressions in Japanese, where the differences between the konna-group and the konoyouna-group have been largely regarded as stylistic variants. The present study, however, reveals their non-stylistic differences in terms of the referential use. Our claims are based on (i) a quantitative analysis of the Balanced Corpus of Contemporary Written Japanese (National Institute for Japanese Language and Linguistics) and (ii) a qualitative analysis employing text-frames. Our central finding is that the konna-group exhibits both the attributive and the content use whereas the konoyouna-group principally exhibits the content use alone. That is, while it is possible that the konoyouna-group could display the attributive use, a sharp contrast is observed in this regard between the two groups, as confirmed by both the quantitative and qualitative analyses. This finding leads to our conclusion that, contrary to the opposing view in the previous literature, the differences between the konna-group and the konoyouna-group cannot be solely ascribed to stylistic differences. It is also suggested that, due to this discrepancy concerning the usages of demonstratives, sonna is most likely to be employed in the konna-group (i.e., konna, sonna, anna) regardless of the media/genre of texts, whereas there is a tendency that konoyouna is used in certain types of text such as analytical texts in the case of the konoyouna-group (i.e., konoyouna, sonoyouna, anoyouna). 본고는 현대일본어의 연체수식형 지시표현에서, 주로 문체 차이로밖에 다루어져 오지 않은 コンナ류와 コノヨウナ류의 지시용법의 차이를 밝힌 것이다. 국립 국어 연구소의 코퍼스(BCCWJ)을 사용한 계량적 조사 및 텍스트 프레임을 사용하여 용례를 분석해 봤다. 그 결과, コンナ류는 속성용법과 내용용법으로 2가지 용법을 가지는 한편, コノヨウナ류는 기본적으로 내용용법만을 가진다고 말할 수 있다. 또 コンナ류와 コノヨウナ류의 용법 차이에 의하여 コンナ류에서는 문장 매체나 장르에 관계없이 항상 ソ계 편중을 보이는 것에 대해 コノヨウナ류에서는논설 문장 등 문장 장르에 좌우되는 コ계 편중이 있다는 차이도 확인할 수 있다.

Examining the factors influencing leaf disease intensity of Kalopanax septemlobus (Thunb. ex Murray) Koidzumi (Araliaceae) over multiple spatial scales: from the individual, forest stand, to the regions in the Japanese Archipelago

Sakaguchi, Shota,Yamasaki, Michimasa,Tanaka, Chihiro,Isagi, Yuji The Ecological Society of Korea 2012 Journal of Ecology and Environment Vol.35 No.4

We investigated leaf disease intensity of Kalopanax septemlobus (prickly castor oil tree) caused by the parasitic fungus Mycosphaerella acanthopanacis, in thirty natural host populations in the Japanese Archipelago. The disease intensity observed for individual trees were analyzed using a generalized additive model as a function of tree size, tree density, climatic terms and spatial trend surface. Individual tree size and conspecific tree density were shown to have significant negative and positive effects on disease intensity, respectively. The findings suggest that the probability of disease infection is partly determined by dispersal of infection agents (ascospores) from the fallen leaves on the ground, which can be enhanced by aggregation of host trees in a forest stand. Regional-scale spatial bias was also present in disease intensity; the populations in northern Japan and southern Kyushu were more severely infected by the fungus than those in southwestern Honshu and Shikoku. Regional variation of disease intensity was explained by both climatic factors and a trend surface term, with a latitudinal cline detected, which increases towards the north. Further research should be conducted in order to understand all of the factors generating the latitudinal cline detected in this study.

No pair production of open strings in a plane-wave background

Sakaguchi, Makoto,Shin, Hyeonjoon,Yoshida, Kentaroh American Physical Society 2014 PHYSICAL REVIEW D - Vol.90 No.6