• Polymer(Korea)
• /
• v.34 no.2
• /
• pp.154-158
• /
• 2010

We first synthesized N-phenylcyclotrisiloxazane ($D_3^{NPh}$) through a cyclization of $\alpha$,$\omega$- dichlorohexamethyltrisiloxane with aniline and prepared poly(dimethylsiloxane-co-N-phenylsiloxazane) copolymer (PDMS-NPSOX) by a ring opening copolymerization of them with hexamethylcyclotrisiloxane $D_3$. An acrylate monomer modified with PDMS-NPSOX was synthesized by using chloroethyl methacrylate and copolymerized with methylmethacrylate (MMA) and n-butylacrylate. The composition of the copolymer was chosen to control their glass transition temperature ($T_g$) to 25 $^{\circ}C$. By changing the comonomer from PDMS to PDMS-NPSOX, $T_g$ and adhesive strength of the copolymer were increased from 20 to 25 $^{\circ}C$ and from 1.76 to 2.23 N/cm, respectively.

• Journal of Digital Convergence
• /
• v.14 no.3
• /
• pp.13-23
• /
• 2016

The purpose of this convergence study was to describe Medical Service Providers and Consumers' perception of the PHN system, and of the Quality of nursing provided by male nurses. This study was a cross-sectional survey. The subject group included medical service providers and consumers. Data were analyzed using descriptive statistics, Chi-square and t-test using SPSS 19.0. 77.3% of providers and 66.2% of consumers agree with the PHN system. 81.4% of providers and 70.8% of consumers agreed with the statement that the nurse is the most qualified public health worker. Period of service showed statistically significant differences according to the group (t=7.56, p=.03). The development of nursing experts was identified as an important strength of the PHN. Quality of nursing Male wasn't statistically significants between groups. Compared to earlier studies, it is to suggest a study that confirms preliminary nurses' psychiatric, social, and communicational nursing.

• Journal of Korean Library and Information Science Society
• /
• v.31 no.4
• /
• pp.259-283
• /
• 2000

본 연구의 목적은 공중보건의들이 환자 치료와 학술적인 연구를 하기 위해 요구하는 정보를 효율적으로 제공하는데 그 목적이 있다. 2000년 10월 23일부터 11월 11일까지 3주 동안 공중보건의 298명을 대상으로 조사하였으며 이용자들의 정보요구와 이용행위로 정보수집방법과 정보원, 그리고 도서관 이용정도와 만족도를 평가한 결과는 다음과 같다. 1) 공중보건의들은 환자치료와 최근의 연구동향을 알고자할 때 정보를 가장 많이 필요로 하는 것으로 나타났다. 가장 많이 이용하는 정보원은 단행본(교과서)과 학술지로 인쇄본을 더 선호하는 것으로 나타났다. 2) 공중보건의들이 그들의 정보요구를 충족시키기 위해 선호하는 정보수입방법은 인터넷 검색과 동료들로 그 이유는 정보접근의 편이성과 정확성 최신성인 것으로 나타났다. 3) 이용자의 50.3%가 정보이용에 어려움을 느낀다고 하였는데 그 이유는 주로 지역적인 문제와 문헌전달의 지연에 있는 것으로 나타났다. 4) 공중보건의들은 정보가 필요할 때 주로 도서관을 이용하여 필요한 정보를 얻는 경향이 있으나 대체적으로 보아 도서관 이용빈도수는 매우 적은 것으로 나타났다.

• Polymer(Korea)
• /
• v.25 no.2
• /
• pp.186-198
• /
• 2001

pH/Thermal sensitive copolymers with the various acidic comonomer compositions composed of N-isopropylacrylamide (NIPAAm) with acrylic acid (AAc), 2-acrylamido glycolic acid (AAmGAc), and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) were synthesized by free radial polymerization. In this study, to characterize the effect of different acidic comonomer composition and pH on the lower critical solution temperature (LCST) behaviors of their copolymers. phase transition experiments were performed with a thermo-optical analyzer (TOA). The phase transition temperature (T$^{p}$ ) of aqueous poly(NIPAAm-co-AAc) solution was lowered with increasing the ionization of the acid group in AAc, that is, the ionized state induced the electrostatic repulsion of ionized groups. In contrast, when AAmGAc was introduced into PNIPAAm, T$^{p}$ was little changed at pH 1-3, whereas climbed up significantly from pH 1 to pH 3. In the range of pH 6-10, Tp was lower than that of pH 3-5. This result was considered to be \"Ionic Screen Effect\" and this effect had been also observed in the case of poly(NIPAAm-co-AMPS).-co-AMPS).

• Fire Science and Engineering
• /
• v.34 no.3
• /
• pp.91-99
• /
• 2020

Recently, a new infectious disease, COVID-19, has been spreading not only in Korea but around the world. As a result, the Korean government raised the level of infectious disease crisis alerts to a serious level on February 23, 2020. The purpose of this study is to apply the situational theory of publics to publics segmentation according to the issuance of a crisis alert and to suggest ways to improve the crisis alert system. To this end, the level of public perception on crisis alerts was checked. The verification confirmed that the situational theory of publics is a suitable theoretical framework for analyzing the communication behaviors of the public toward crisis alerts. As a result of the public segmentation, 42.7% were classified as active publics. Based on this, it was suggested to reorganize the crisis alert system as a system for communicating with the public.

• Korea Information Processing Society Review
• /
• v.11 no.1
• /
• pp.20-28
• /
• 2004

영화 '스타워즈'를 보면 적들과 대치하고 있는 일촉즉발의 위기 상황에서 '해결사'가 나타나 공주의 메시지를 공중에 홀로그램으로 재생시켜 모면책을 알려주고 순식간에 사라지는 장면이 나온다. 그리고, 영화 '마이너리티 리포트'에서는 주인공 톰크루즈가 가족과 찍은 동영상을 일반적인 디스플레이가 아닌 공중에다 홀로그램을 펼쳐놓고 3차원 입체영상을 만들어 회상하는 장면이 나온다.(중략)

• Korean journal of communication and information
• /
• v.21
• /
• pp.114-146
• /
• 2003

The purpose of this study is to explore and explain how organization-public relations influence organizational reputation, accounted for by the moderating effect of level of involvement. For this purpose, a survey was conducted to 100 residents in a metropolitan city of Korea with the following five Korean organizations studied: two Korean domestic companies, a sports association, a non-profit organization, and a multinational company. Results of multiple regression analysis indicated that organization-public relationships and publics' level of involvement were significant predictors to account for organizational reputation by non-chance amount, and that level of involvement played a moderating variable role between organization-public relationships and organizational reputation.

• Proceedings of the Korean Fiber Society Conference
• /
• 2003.10b
• /
• pp.167-168
• /
• 2003

Dimethyl-2,6-naphthalenedicarboxylate(2,6-NDC)와 ethylene glycol(EG)로부터 유도되는 폴리에틸렌 나프탈레이트(PEN)는 폴리에틸렌 테레프탈레이트(PET)보다 열적 및 기계적 특성이 우수한 열가소성 고분자이며[1-2], 폴리에틸렌 글리콜(PEG)은 diol기를 함유한 친수성 고분자로서 의약품 및 기타 가공제로 널리 쓰이는 물질이다. 이미 PET는 이러한 PEC를 PET 합성과정에서 공단량체로 사용해 공중합시킴으로서 친수성을 갖는 PET로 개질하고자 하는 연구[3-4]가 다수 보고되어 왔으나, PEN의 경유는 아직 이에 관한 연구보고가 없는 실정이다. (중략)

• Journal of the Korean housing association
• /
• v.14 no.3
• /
• pp.29-40
• /
• 2003

Street-in-the-air has been regarded as a device which supplements the defects of high-rise blocks. It should be, however, noted that most of street-in-the-air has been based on the concept of urbanity in the automobile era as well. Based on this point of view, the 5 types of approaches to the street-in-the-air in this paper were introduced. Throughout the research, it was figured out that the types of approaches focusing the urban spatial system tended to neglect the essential properties of street itself as place for everyday life. In considering that street is defined by relationship with building or units, it is necessary to secure the correlation of street-in-the-air with units prior to considering the urban spatial system.

• Proceedings of the Korean Fiber Society Conference
• /
• 1996.10a
• /
• pp.333-338
• /
• 1996