著者

宮崎 航 盧 渓 小田 政子 黒田 嘉紀 青木 一雄 三渕 浩 大場 隆 加藤 貴彦

出版者

一般社団法人日本衛生学会

雑誌

日本衛生学雑誌 (ISSN:00215082)

巻号頁・発行日

vol.71, no.2, pp.138-148, 2016 (Released:2016-05-27)

参考文献数

24

---

Objectives: The incidence of infant allergic diseases have increased recently, and it may be caused by multiple influences of both genetic and environmental factors from the fetal stage through infancy. In this study, we analyzed a data subset from the South Kyushu and Okinawa (SKO) Study Area of Japan Environment and Children’s Study (JECS) to determine the relationship of allergic diseases in infants with mothers’ characteristics and/or infants’ life habits, especially sleeping. Methods: A total of 3873 mother-infant pairs from the SKO Regional Center of JECS were included. The mothers responded to questionnaires in the first trimester of their pregnancy and the self-reported questionnaire when their infants were 1 year old. Student’s t-test, chi-square test, trend test, and logistic regression analysis were carried out to analyze the associations between the infants’ allergic diseases and the mothers’ genetic characteristics and/or sleeping habits of infants. Results: Maternal allergic diseases were significantly associated with increased infant allergy risk (OR: 1.93, 95% CI: 1.63–2.27). The number of allergic diseases of mothers was also significantly associated with infant allergy, and the trend test showed an increasing risk of infant allergy (p<0.001). Regarding infants’ life habits, the infants who sleep in the prone position had a higher allergic disease risk than those who sleep in other positions (OR: 1.46, 95% CI: 1.17–1.83). These significant associations were observed regardless of the presence of allergy in mothers. Conclusions: This study suggests that the development of allergic diseases in infants may be caused by the multiple participation of both genetic and environmental factors.

著者

大場 隆之 中村 友二

出版者

公益社団法人 応用物理学会

雑誌

応用物理 (ISSN:03698009)

巻号頁・発行日

vol.89, no.2, pp.75-81, 2020-02-10 (Released:2020-02-10)

参考文献数

72

---

多様に進化した3次元集積技術をレビューする.電子情報産業は,半導体デバイスとシステムの機能および市場性を両輪として300兆円規模に発展した.これらを牽引(けんいん)してきたのが微細化と実装技術である.ところが,微細化は物理限界に近づき,また実装性能は頭打ちになりつつある.3次元集積技術は,これら2つの課題に対する新たなブレークスルーとして今後進展することが期待されている.本稿では,さらなる高集積化,高機能化に向け,前工程・後工程それぞれの世界で開発が進められた3次元積層技術を振り返り,筆者らが開発したウェーハレベル3次元集積技術について紹介する.

著者

近藤 直 大場 隆之 伊藤 浩之 鹿島 光司 深水 克郎 Kondo Naoshi Oba Takayuki Ito Hiroyuki Kashima Koji Fukozu Katsuro

出版者

宇宙航空研究開発機構(JAXA)

雑誌

宇宙航空研究開発機構特別資料 = JAXA Special Publication (ISSN:24332232)

巻号頁・発行日

vol.JAXA-SP-19-001, pp.53-63, 2019-06-19

---

月面農場にて栽培する8品目(イネ、ダイズ、サツマイモ、ジャガイモ、トマト、レタス、キュウリ、イチゴ)を、居住人数6人および100人を想定し、特に100人の場合において効率的に生産可能と考えられる方法を提案する。本提案では、まず栽培8品目すべてに共通して適用する技術を示す。次にそれぞれの生産品目ごとに栽培スタイル(栽培様式)を定める。そしてその様式を実現するために最適な栽培方式、例えばバッチ式の栽培か栽培部分が移動することによる連続式かに大まかに大別した。作物の生産過程は、播種(定植)、生育、収穫などの工程に区分され、各工程において可能な限り自動作業を導入するために必要な生育・環境モニタリング項目、具体的なセンシング方法および機械化方法を提案する。それら要素技術の中には、既存の技術を応用することで達成可能と考えられるものもあるが、ドローン、ロボットの開発やセンシング方法の確立など、今後さらなる技術向上が必要と考えられる方法も含む。

著者

大場 隆広

出版者

Business History Society of Japan

雑誌

経営史学 (ISSN:03869113)

巻号頁・発行日

vol.43, no.2, pp.2_30-2_56, 2008 (Released:2012-02-11)

---

The purpose of this article is to clarify roles of high school graduate workers in Japan from the 1950s to the early 1960s. In particular, I address the following questions: Did high school graduate workers play the same roles as junior high school graduate workers in factories? And, if they played different roles, how were their roles different from those of junior high school graduate workers?In post-war Japan, high school enrollment ratio substantially went up, which led to the increase of high school graduate workers. High school graduates had worked as engineers and white-collars until the 1950s, while junior high school graduates had worked as skilled blue-collar workers. As a result of the increase of high school graduates, they came to be employed as blue-collar workers. The primary goal of this article is to reveal the impact of high school graduate workers on the production and working systems.To make clear the impact, first, I examine questionnaire surveys and other documents. From these surveys and documents, I derive two hypotheses: One hypothesis is that high school graduate workers were employed as substitutions of junior high school graduate workers and thus simply took same roles as junior high school graduate workers. The other hypothesis is that high school graduates contributed to the development of production systems as workers suitable for dealing with new technology, equipment or machines and thus had different roles from junior high school graduate workers.Then, I confirm those hypotheses using the data and reports by the University of Tokyo on three major companies; Hazama-gumi, Ishikawajima Heavy Industries, and Toyo Koatsu Kogyo. All investigations and reports for this study were made in the 1950s or the early 1960s. After examining these data and reports, I statistically analyze whether high school graduate workers had a positive impact on factory's production by using quantitative data. Finally, I make a concluding statement on roles of high school graduate workers and their impact on production systems.

著者

加藤 貴彦 松尾 佳奈 黒田 庄一郎 盧 渓 小田 政子 大場 隆

出版者

日本衛生学会

雑誌

日本衛生学雑誌 (ISSN:00215082)

巻号頁・発行日

vol.69, no.3, pp.211-214, 2014 (Released:2014-09-24)

参考文献数

3

---

In a long-term large cohort study, we introduced an electronic money system for remuneration of research participants. In comparison with the delivery of cash vouchers, the operation and mailing cost, and the processing time were significantly reduced. The workers were also able to save the time and effort they spent on the inventory management of cash vouchers. In addition, risk management was improved, as demonstrated by the reduction of complaints and associated problems such as nonarrival or content differences of cash vouchers. This is because only card points as additional money need to be added once the electronic money card has been distributed to the recipients. Furthermore, the psychological stress of workers associated with inventory management and ensuring cash voucher enclosure was also reduced.