An Efficient Preparation of 4-Nitrosoaniline from the Reaction of Nitrobenzene with Alkali Metal Ureates

Park, Jaebum,Kim, Hyung Jin Korean Chemical Society 2016 대한화학회지 Vol.60 No.4

This paper describes the synthesis of alkali metal salts of urea (ureates) and their application to the direct preparation of 4-nitrosoaniline from nitrobenzene via nucleophilic aromatic substitution of hydrogen. Sodium and potassium ureates were readily prepared from the reaction of urea with sodium hydride, metal methoxides, and metal hydroxides. The effect of ureates as nucleophiles on the conversion of nitrobenzene to 4-nitrosoaniline was investigated and compared with that of a urea-metal hydroxide mixture. It was found that the ureates were superior for producing 4-nitrosoaniline owing to their higher thermal stability of the ureate. The ureate obtained from the treatment of urea with sodium hydride gave the highest yield for the preparation of 4-nitrosoaniline. The ureates generated from the reaction of urea with metal hydroxide also gave high yields of 4-nitrosoaniline. Catalytic hydrogenation of 4-nitrosoaniline afforded polymer-grade 1,4-benzenediamine in quantitative yield.

Excellent Brightness with Shortening Lifetime of Textured Zn₂SiO₄:Mn²⁺Phosphor Films on Quartz Glass

Park, Jehong,Park, Kwangwon,Lee, Jaebum,Kim, Jongsu,Kim, Seongsin Margaret,Kung, Patrick IOP Publishing 2010 Japanese journal of applied physics Vol.49 No.r4

An Efficient Preparation of 4-Nitrosoaniline from the Reaction of Nitrobenzene with Alkali Metal Ureates

Jaebum Park,김형진 대한화학회 2016 대한화학회지 Vol.60 No.4

This paper describes the synthesis of alkali metal salts of urea (ureates) and their application to the direct preparation of 4-nitrosoaniline from nitrobenzene via nucleophilic aromatic substitution of hydrogen. Sodium and potassium ureates were readily prepared from the reaction of urea with sodium hydride, metal methoxides, and metal hydroxides. The effect of ureates as nucleophiles on the conversion of nitrobenzene to 4-nitrosoaniline was investigated and compared with that of a urea-metal hydroxide mixture. It was found that the ureates were superior for producing 4-nitrosoaniline owing to their higher thermal stability of the ureate. The ureate obtained from the treatment of urea with sodium hydride gave the highest yield for the preparation of 4-nitrosoaniline. The ureates generated from the reaction of urea with metal hydroxide also gave high yields of 4-nitrosoaniline. Catalytic hydrogenation of 4-nitrosoaniline afforded polymer-grade 1,4-benzenediamine in quantitative yield.

Multi-element synergies in human movements

( Jaebum Park ) 대한운동사협회 2017 대한운동사협회 운동사대회자료집 Vol.2017 No.-

Security Requirements for the Medical Information Used by U-Healthcare Medical Equipment

Jaebum Son,Soonseok Kim,Gilhong Park,Jihun Cha,Kijung Park 보안공학연구지원센터 2013 International Journal of Security and Its Applicat Vol.7 No.1

Raman spectrum identification based on the correlation score using the weighted segmental hit quality index

Park, Jun-Kyu,Park, Aaron,Yang, Si Kyung,Baek, Sung-June,Hwang, Joonki,Choo, Jaebum The Royal Society of Chemistry 2017 The Analyst Vol.142 No.2

<P>In this paper, we consider a novel method for identification of Raman spectra recorded on different instruments with different wavelengths. Since the conventional hit quality index (HQI) is vulnerable to intensity variation, it needs intensity calibration or standardization for each spectrometer, which causes additional time consuming work. To simplify this process and enhance the identification performance, we propose a new scoring method which is defined as the weighted sum of the HQIs from segmented spectra by windowing. To show the effectiveness of the proposed method, the experiments were carried out with 10 kinds of chemicals with their spectra recorded on 3 different instruments with different laser wavelengths. According to the identification results with 14 033 chemicals, the proposed method identified all test chemicals without error, which indicates that the proposed method could be used as a promising alternative to the existing methods.</P>

증강현실을 이용한 큐브 맞추기 안내 시스템

박재범(Jaebum Park),박창훈(Changhoon Park) 한국HCI학회 2014 한국HCI학회 학술대회 Vol.2014 No.2

큐브 퍼즐은 작은 여러 개의 정육면체가 모여 만들어진 하나의 큰 정육면체 형태이며, 큐브를 맞춘다는 것은 보이는 면의 색을 동일하게 만든다는 의미를 지닌다. 큐브를 돌리면서 생기는 조합은 43,252,003,274,489,856, 000개이며, 이중 큐브를 모두 맞추는 경우는 오직 하나뿐이기 때문에 많은 사람이 큐브 맞추기를 시도하지만 성공하기는 어렵다. 더욱이, 큐브 맞추기를 위한 해결방식은 대부분 설명서의 형태로 제공된다. 따라서, 초보자가 설명서를 보면서 큐브 맞추기를 따라하기가 힘들고, 해당 조합에 대한 해결 방식이 아닌 일반적인 공식의 형태로 제공되기 때문에 한계가 있다. 본 논문은 증간현실 기술을 이용하여 큐브 맞추기를 위한 안내 시스템을 제안한다. 본 시스템은 먼저 뒤섞인 큐브의 각 면을 인식하고, 인식한 큐브의 조합에 대하여 큐브를 풀기위한 해결 알고리즘을 수행하고, 그 결과인 큐브 조작을 위한 일련의 단계를 사용자에게 직관적으로 제시하여 큐브 맞추기를 쉽게 따라하도록 설계하였다. 본 논문에서 우리는 큐브 맞추기와 같은 퍼즐을 풀기위하여 사용자가 두 손을 이용하여 일련의 조작을 할 때, 증강현실 기술을 이용하여 해당 작업을 쉽고 빠르게 수행할 수 있도록 지원하는 안내 시스템을 구현하였다.

거대 배열 안테나 무선 백홀 하향 링크 시스템에서 피드백 량을 줄이기 위한 빔 형성 방법

박재범(Jaebum Park),권기림(Girim Kwon),박현철(Hyuncheol Park) 한국통신학회 2016 韓國通信學會論文誌 Vol.41 No.12

郁達夫의 「沈淪」, 모방문학으로서의 양상과 의미

박재범(Park, jaebum),박정규(Park, Jeong Kyu) 한국중어중문학회 2014 中語中文學 Vol.59 No.-

Yudafu"s 「沈淪 Sinking」had an immediate impact on the contemporary readers, because of its daring self - exposure, a pure confession and originality, etc, which could not be found in other works of his contemporaries. It is unabasedly autobiographical, and it is filled with all kinds of incidents that Yudafu had met, or all sorts of experiences and feelings that he had had while he was in Japan. Some says that Yudafu was charmed by 「The hypochondria of garden “田園の憂鬱” 」 by Japanese writer Sato Haruo and "I-novel" prevailing at that time in Japan, and his deep concern about them helped Yudafu write 「沈淪 Sinking」. He declared that all literature is autobiographical, and he took to making literature that reflected and imitated everything about himself, including the writer"s own experience, behaviors and feelings. 「沈淪 Sinking」is considered as the first and representative novel that embodied and practiced his literary insistence and creed. In Short, Yudafu wrote「沈淪 Sinking」 through making an exact copy of his real experience and feelings, and imitating the figure of a hero in 「The hypochondria of garden “田園の憂鬱”」 by Japanese writer Sato Haruo. On 「沈淪 Sinking」 was imprinted two kinds of imitation, which reproduced his real experience and feelings, and the figure of a hero in 「The hypochondria of garden “田園の憂鬱”」. So, Yudafu"s 「沈淪 Sinking」is regarded as imitation novel in this paper. What he did imitate from his real life lived during his stay in Japan, and from the figure of a hero in 「The hypochondria of garden “田園の憂鬱”」, is discussed in this paper. To study on the imitative aspects and its literary implication seen in Yudafu"s 「沈淪 Sinking」, being focused on the comparison with Japanese writer Sato Haruo"s 「 Hypochondria of Garden 」, is the main purpose of this paper. Literature, or lierary works, in fact, is the product of language itself, because all kinds of things in literature, including the characters, are expressed and described only with language and words by writers. In order to define the imitative aspects found in 「沈淪 Sinking」 clearly and accurately, this paper uses the theory of the structure of language - signifiant and signifie, proposed by Saussure Ferdinan De, Swiss linguist, who insisted that language is composed of signifiant and signifier, introducing new theory on the structure of language to world. It comes to a conclusion, in this paper, that the first imitative aspects seen in a hero of 「沈淪 Sinking」- maladjustment to his social environment and wandering for sexual desire, drawn from the writer Yudafu"s real experience, behaviors and feelings can be regarded as "signifiant", and the second imitative aspects - a figure suffering from hypochodria and his indulgence and addiction, described after a figure of a hero in 「The hypochondria of garden “田園の憂鬱”」, may be thought of as signifier, since maladjustment to his social environment joins hypochondria (mental depression) and wandering for sexual desire is connected to indulgence and addiction to sex.

2030세대의 양성평등의식, 부모됨의 인식, 출산의식의 구조적 관계분석

박재범 ( Jaebum Park ) 사단법인 아시아문화학술원 2020 인문사회 21 Vol.11 No.6

본 연구의 목적은 저출산 문제에 대한 근본적인 원인을 파악하기 위해 양성평등 의식이 미혼남녀의 출산의식에 미치는 영향요인을 규명하는데 있다. 이를 위해 2030 세대를 대상으로 양성평등의식이 출산의식에 미치는 영향과의 관계를 살피고, 양성평등의식과 부모됨의 인식이 출산의식에 미치는 영향 및 관계를 동시에 분석하였다. 연구결과는 다음과 같다. 첫째, 가정생활에 대한 인식이 긍정적일수록 출산의식이 긍정적인 것으로 파악되었다. 둘째, 양성평등의식이 부모됨의 인식에 미치는 영향은 안정된 가정 지향형에 가장 큰 영향력을 미치는 것으로 나타났다. 셋째, 부모됨의 인식이 출산의식에 미치는 영향은 자녀가치관에만 영향을 미치는 것으로 파악되었다. 본 연구는 출산의식과 직접적인 관계가 있는 미혼남녀의 가치관을 실증적으로 분석하였다는데 연구의 의의가 있다. The purpose of this study is to investigate the factors that influence gender equality consciousness on unmarried men and women’s fertility consciousness in order to understand the underlying cause of the low birth rate problem. To achieve these research objectives the relationship between gender equality consciousness and the perception of parenthood on fertility consciousness was examined for 2030 generations, and the effects and relationships of gender equality consciousness and parental awareness on fertility consciousness were simultaneously analyzed. The research results are as follows. First, the more positive the perception of family life is, the more positive the childbirth consciousness is. Second, it was found that the effect of gender equality consciousness on the perception of parenthood has the greatest influence on the stable family-oriented type. Third, it was found that the influence of the perception of parenthood on childbirth consciousness only affects the values of children. The significance of this study is that this study empirically analyzed the values of unmarried men and women, which are directly related to childbirth consciousness.