http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : P . B . Gwan (검색결과 7,832 건)
- 무료
- 기관 내 무료
- 유료
-
미세다공필름 물성에 분산성이 개선된 이산화티타늄이 미치는 영향
김문선,정재관 한국화학공학회 2000 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.38 No.5
종이와 같이 가볍고 백색도가 높으면서 기계적 특성이 우수한 미세다공필름을 제조하기 위하여 폴리에틸렌테레프탈레이트수지와 폴리프로필렌수지, 이산화티타늄을 혼합하여 필름내부에 미세한 공간들이 균일하게 생성할 수 있는 조건에 대해 연구하였다. L/D비가 40인 투윈스크류 압출기를 사용하여 압출량 20㎏/h, 스크류의 회전속도가 40rpm인 비처리량이 0.05 ㎏/h·rpm 조건에서 인장강도가 가장 높았으며 폴리에틸렌테레프탈레이트수지 88 wt%와 폴리프로필렌수지를 12 wt% 조건으로 혼합하는 것이 우수한 기계적 특성과 낮은 밀도를 동시에 만족할 수 있는 최적 조건이다. 이산화티타늄의 분산성은 미세다중필름의 밀도와 기계적 특성에 영향을 미쳤으며 이산화티타늄 표면에 올소인산이 분산제로 사용된 15 ㎎PO^₄(-3)/g 이 가장 좋은 효과가 있었다. We have studied on the conditions to make uniform microvoids inside a film by blending with polyethyleneterephthalate, polypropylene and titanium dioxide in order to produce microvoided films with light weight like paper, high whiteness and brilliant mechanical properties. In twin screw extruder with length to diameter ratio(L/D), 40, it was possible to get the highest tensile strength at specific throughput of 0.05 ㎏/h with the extrusion amount of 20 ㎏/h and screw rotational speed of 400 rpm, and to satisfy the goal mechanical properties and low density at the blending conditions of polyethyleneterephthalate, 88 wt% and polypropylene, 12 wt%. It was found that the dispersion property of titanium dioxide affected the density and mechanical properties of microvoided films and the effect was best at the condition of l5 ㎎PO₄^(-3)/g as the surfactant on titanium dioxide surfaces.
-
박종관 ( Park Jong Gwan ) 한국행정사학회 2021 韓國行政史學誌 Vol.52 No.-
우리나라의 1945년 해방은 일본제국주의의 패전에 따른 단순한 부산물만은 아니었다. 조선 말기 이후 일본제국주의의 강점기에 끊임없이 전개된 우리 민족의 독립을 향한 많은 독립운동가의 열망과 노력, 분투의 결과였으며, 유관순열사의 3.1운동도 그중의 하나이다. 유관순열사는 1919년 3·1운동 당시 병천아우내장터의 만세시위를 주도하다가 검거되었으며, 다음 해인 1920년 10월 형무소에서 옥사하였다. 이러한 역사적 사실에 근거하여 유관순열사는 1962년 정부로부터 건국훈장 독립장을 수여받았다. 정부는 2019년 유관순열사의 서훈을 1등급으로 상향추서 하였다. 이에 따라 본 연구는 시민들의 유관순열사의 서훈등급 및 서훈인식 등의 연구를 하는데 그 목적이 있다. 연구목적 달성을 위해 유관순 열사의 서훈등급, 서훈인식, 기타 사업 활성화 방안 등을 조사하였다. 먼저, 우리나라 서훈 제도, 독립유공자의 포상과 유관순열사의 서훈문제, 선행연구를 검토 하였다. 다음으로 기존 연구를 바탕으로 측정지표를 도출하였다. 그다음으로 유관순열사의 서훈 등급 향상, 유관순열사 정신 잇기 등과 관련 영역을 설문조사하였다. 마지막으로 유관순열사 관련 사업의 개선 및 발전방안을 제시했다. 유관순 열사의 사업활성화를 위한 방안은 다음과 같다. 먼저, 유관순열사 정신을 잇기 위해 ‘열사의 사적지보존 및 기념관 관리’, ‘초·중·고등학생 생가방문 활성화’, ‘유관순 열사체험관 건립’ 등이 필요하다. 다음으로 유관순열사의 사적지 및 기념관 방문객 증대를 위한 노력으로는 ‘보다 많은 공연 등 볼거리 제공’, 생가 방문을 위한 ‘셔틀버스 운영’, ‘시설개방과 이용시간의 연장’ 등이다. 마지막으로 홍보자료를 정교하게 만들어서 인터넷, 언론 등 다양한 방법으로 홍보를 강화해야 한다. Korea’s 1945 liberation was not just a byproduct of the defeat of Japanese imperialism. It was the result of the aspirations, efforts, and struggles of many independence activists toward the independence of the Korean people that developed during the Japanese imperialism period since the end of Joseon Dynasty, and the March 1 Movement of Yu Gwan-sun was one of them. Yu Gwansun was arrested during the March 1st Movement in 1919 while leading the Manse demonstration at the Aunae Site in Byeongcheon. He died in prison in October 1920 the following year. Based on this historical fact, Yu Gwan-sun was awarded the Order of Independence of the Order of National Foundation by the government in 1962. The government raised the honor of martyr Yu Gwan-sun to the first grade in 2019. Accordingly, the purpose of this study is to conduct research on the rank of conferment and recognition of conferment of martyr Yoo Gwan-sun. In order to achieve the purpose of the research, a survey was conducted on the rank of conferment, recognition of conferment, and other measures to promote projects, etc. of martyr Yoo Gwan-soon. First of all, the Korean conferment system, the reward of independence fighters, the conferment of martyr Yu Gwan-sun, and prior research were reviewed. Next, measuring indicators were derived based on existing studies. Next, it surveyed the areas related to the improvement of the conferment of martyr Yu Gwansun and the connection of the spirit of Yu Gwansun. Finally, the government proposed ways to improve and develop related projects to the martyrs. Measures for the revitalization of the project of Yu Gwan-soon shall be as follows: First of all, to continue the spirit of martyr Yoo Gwan-sun, “preservation of the historical site and memorial hall management of the martyrs,” “activation of visits to birthplace of elementary, middle and high school students,” and “construction of the martyr Yoo Kwan-soon Experience Center” are needed. Next, efforts to increase the number of visitors to Yu Gwan-sun’s historic sites and memorial halls include “more performances and other attractions,” “shuttle bus operation” for visits to birthplaces, and “open facilities and extend use hours.” Finally, promotional public relations should be elaborated and promoted in various ways such as the Internet and the media.
-
-
Long-term outcomes of initially conservatively treated midshaft clavicle fractures
Gwan Bum Lee,Hyojune Kim,In-Ho Jeon,Kyoung Hwan Koh 대한견주관절의학회 2021 대한견주관절의학회지 Vol.24 No.1
Background: Recent studies about completely displaced midshaft clavicle fractures have reported that their nonunion/malunion rates were significantly higher in conservatively treated patients compared to surgically treated patients. The purpose of this study was to evaluate the factors associated with treatment decisions for midshaft clavicle fractures and also the factors that affect patient satisfaction with their treatment choice. Methods: We retrospectively reviewed the records of 75 patients who had been diagnosed with a midshaft clavicle fracture and were treated conservatively at a single institution between March 1, 2013, and December 31, 2014. Their medical records were reviewed to investigate the severity of the initial vertical displacement. A telephone survey was carried out to identify the presence of any patient-perceived deformity and determine if the patient eventually underwent surgery and whether the patient would prefer surgery if the injury recurred. Results: Significantly more patients with vertical displacement ≥100% (9/28) eventually underwent surgery compared to patients with vertical displacement <100% (3/32, p=0.028). Patients with vertical displacement ≥100% (13/28) were significantly more likely to prefer surgery compared to patients with vertical displacement <100% (7/32, p=0.044). Among the conservatively treated patients, nine of 32 participants with a patient-perceived deformity and one of 16 without a patient-perceived deformity responded that they would prefer to receive surgery in same situation in the future (p=0.079). Conclusions: Patients with a midshaft clavicle fracture with vertical displacement of ≥100% may eventually require surgical treatment. When conservative treatment is carried out, the long-term patient results may be unsatisfactory due to perceived residual deformities.
-
-
Gwan-Soon Jang,Yi Nam 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.5
This study was conducted to test the applicability of hydroxy radical reactor system, which applied advanced oxidation processes, to sterilize pathogenic bacteria for nutrient solution recycling in closed hydroponics. Removal efficiency was tested on 25 L of nutrient solution maxed with 10 mL culture solution of bacteria, E. coli, and R. solanacearum in a pilot tank. The testing conditions included various levels of hydroxy radicals resulting from air flow rates of 40, 80, and 120 L min<SUP>-1</SUP>, and 12 hours processing time. The removal of bacteria, E. coli, and R. solanacearum by hydroxy radical in nutrient solution was significantly increased with an increase in the flow rate of the air from 40 L min<SUP>-1</SUP> to 120 L min<SUP>-1</SUP>. The optimum removal efficiency was achieved at an air flow rate of 120 L min<SUP>-1</SUP> for 2 hours treatment. There were no significant differences in removal efficiency among bacteria, E. coli, and R. solanacearum for tested level and time of hydroxy radical. These results verified the efficiency of hydroxy radical in removing the pathogenic bacteria and the applicability of hydroxy radical reactor system in the field.
-
-
-
-
KCI연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
