• 한국기계가공학회지
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• 제18권6호
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• pp.26-32
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• 2019

Ball end mills used for high-speed and high-precision machining require longer machining time than flat end mills or face cutters, since the tool diameter is limited and the rigidity is reduced by the characteristics of the tool's cutting edge: at the top end of the tool, the cutting speed approaches zero and hardly removes any material. Because there is little material removal at the top end of the ball end mill, the outer cutting edge performs the majority of the work; this irregular cutting force deforms the tool and shortens its life. In this study, we attached an eddy-current sensor to a tool to measure the deformation from the cutting force and we used a tool dynamometer to measure the cutting force. We found that the change in cutting force is dependent on the change in feed rate during square-shaped processing and, as the feed rate is accelerated, the cutting force also increases. Higher cutting forces increase tool deformation.

• 의료커뮤니케이션
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• 제13권2호
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• pp.185-193
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• 2018

Background: Nursing college students are exposed to information about diseases or drugs, and are likely to have a distorted perception of drug knowledge or behavior. The study aimed to identify knowledge and attitude about drugs and current status of self-medication among nursing students. Methods: The subjects were 172 nursing students from a university in Busan. Data were collected with structured questionnaires and analyzed using descriptive analysis, t-test, and one-way ANOVA using SPSS 23.0. Results: Nursing students had a high level of knowledge about drugs, but attitudes toward drugs were relatively low. 83.7% of patients had experience of self-medication. The methods to acquire information for self-administration were 29.9% by smart phone and 27.1% by internet. The use of nonsteroidal anti-inflammatory drugs (NSAIDs) among self-medication drugs was the highest. The most common reason for self-medication was 'I thought it to be a mild disease', and the pharmacists were the most affected by choice of self-medication. The knowledge about drugs was statistically significant according to grade, school life satisfaction and subjective health status. The attitudes about medication were statistically significant according to grade and self-medication experience. Conclusion: Nursing college students need drug safety education to improve awareness and practice of correct drug use.

• 한국산업융합학회 논문집
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• 제25권1호
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• pp.87-99
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• 2022

We propoes a study on the dynamic characteristics analysis and position control of 5-degree multi-joint manipulators for untact remote working at construction sites and manufacturing plants. The main frame of freedom multi-joint manipulator consists of five elements, boom cylinder, boom cylinder, arm cylinder, bucket cylinder, and rotation joint and link. In addition, the main purpose of the proposed system is to realize the work of the manufacturing process or construction site by remote control. Motion control of the entire system is a servo valve control method by hydraulic servo cylinders for one to four joints, and a servo motor control method is applied for five joints. The reliability of the proposed method was verified through performance experiments by computer simulation.

• 한국보건간호학회지
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• 제35권3호
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• pp.469-480
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• 2021

Purpose: Nurses are exposed to stressful circumstances during the COVID-19 outbreak, which increases their turnover intention. This study aimed to identify predictive factors of turnover intention among nurses during the COVID-19 outbreak. Methods: This study was a cross-sectional design using self-report questionnaires. A total of 164 nurses working at three hospitals participated voluntarily in the study. Questionnaires included nursing professionalism, job satisfaction, control belief and COVID-19 stress. Data were collected from February 1, 2021, to March 15, 2021. Data were analyzed with SPSS WIN 23.0 program using descriptive statistics, x2-test, independent t-test and logistic regression. Results: The turnover intention rate of nurses was 33.5%. Two significant predictors of nurses' turnover intention were identified, including risk acceptance in caring for patients with COVID-19 (odds ratio [OR] 4.24, 95% confidence interval [CI]=1.76~10.49) and nursing professionalism (OR=1.06, 95% CI=1.02~1.10). Conclusion: Hospital administrations should provide an improved work environment, such as individual protective equipment, compensation and protective system to nurses to avoid turnover intention in COVID-19 outbreak.

• 한국산업융합학회 논문집
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• 제27권1호
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• pp.143-149
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• 2024

The production and procurement of shipbuilding and offshore equipment is an important competitive factor in the shipbuilding and offshore industry. Recently, ICT-based digital technology has been rapidly applied to the manufacturing industry following the Fourth Industrial Revolution. Under the digital transformation, real-time data interface technology based on SCM (Supply Chain Management) is emerging as an important tool to improve the efficiency of the equipment manufacturing process. In this study, the characteristics and advantages and disadvantages of interface technologies of web-based data interface technologies were compared and analyzed. The performance was compared between theoretical evaluation based on technical features and practical application cases. As a result, it was confirmed that GraphQL is useful for selective data processing, but there is a problem with optimization, and REST API has a problem with receiving data due to a fixed data structure. Therefore, this study aims to suggest ways to utilize and optimize these data interface technologies.

• 한국잡초학회지
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• 제10권2호
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• pp.75-82
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• 1990

1989년(年) 9월(月) 경남 북(慶南.北) 수로변(水路邊)에서 조사(調査)된 초종(草種)은 각각(各各) 33과(科) 88종(種) 및 33과(科) 96종(種)이었으며, 2차원적(次元的) 분류방법(分類方法)에 의(依)하여 경남지역(慶南地域)에 3개(個) 군락형(群落型)과 경북지역(慶北地域)의 5개(個) 군락형(群落型)이 조사(調査)되었다. 경남지역(慶南地域)의 군락(群落)은 피(Echinochloa crusgalli)군락(群落), 여뀌(Persicaria hydropiper)군락(群落) 및 고마리(Persicaria thunbergii)군락(群落) 등(等)이었고, 경북지역(慶北地域)은 환삼덩굴-미국가막사리(Humulus japonicus-Biden frondosa)군락(群落), 까마중(Solanum nigrum)군락(群落), 고마리-환삼덩굴(Persicaria thunbergii-Humulus japonicus)군락(群落), 환삼덩굴(Humulus japonicus)군락(群落) 및 고마리(Persicaria thunbergii)군락(群落) 등(等)이었다. 경남 북지역(慶南 北地域) 공(共)히 고마리, 여뀌 군락(群落)이 조사(調査)되었고 수생잡초(水生雜草)인 고마리, 여뀌가 수로변(水路邊)이 대표적(代表的)인 초종(草種)으로 조사(調査)되었다.

• 한국육종학회지
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• 제41권4호
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• pp.560-563
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• 2009

"골든아이" 품종은 경남농업기술원 화훼연구소에서 분홍색 홑꽃인 "로사"를 모본, 백색 홑꽃인 "안개소국"을 부본으로 인공교배를 실시하여 2004에서 2008년에 걸쳐서 파종과 계통선발을 통해 육성하였다. 품종의 특성검정은 2006년부터 2008년까지 봄 촉성재배와 가을 억제재배 조건아래서 3회에 걸쳐 조사하였다. "골든아이" 품종의 자연개화기는 10월23일경으로 개화가 빠른 편이며, 일장조절에 의해 주년재배가 가능하다. 초장이 95.2 cm이고 꽃 크기가 2.4 cm인 산티니계의 스프레이국화로 착화수는 23.2개로 다화성품종이다. 화색은 황색이며, 개화형태는 산방화서이다. 봄의 단일상태에서 "골든아이" 품종의 개화소요일수는 49일 정도이며, 가을 절화수명검정에서 25.7일로 아주 긴 편이다.

• 농업생명과학연구
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• 제44권5호
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• pp.137-146
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• 2010

경남지역은 우리나라 국화 재배의 중심지로 1960년대부터 국화 재배를 시작하여 전국에서 가장 먼저 국화 재배를 도입한 지역 가운데 하나이다. 과거 경남지역 국화농가의 소득률은 다른 지역에 비해 상대적으로 높았으나 최근에는 지속적으로 약화되는 추세를 보이고 있다. 이 연구의 목적은 경남지역 국화농가의 소득률을 분석하여 소득률이 저하되는 원인을 찾는 데 있다. 분석 결과, 조수입보다는 경영비 측면에서의 원인으로 소득률이 악화된 것으로 나타났다. 경영비 가운데에서도 특히 유가 변화에 영향을 받는 광열동력비의 변화에 따라 소득률이 큰 폭으로 변화하였다. 경남지역을 포함한 우리나라 국화농가의 경우, 유가(면세유 기준)가 리터당 700원 이상이 되면 소득률이 크게 하락하는 것으로 나타났다.

• 화훼연구
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• 제17권2호
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• pp.137-140
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• 2009

'Noble Wine' 품종은 경남농업기술원 화훼연구소에서 백색 홑꽃인 'SL03-01'을 모본, 복색 홑꽃인 'Artist Pink' 를 부본으로 인공교배를 실시하여 2003년에서 2007년에 걸쳐서 파종과 계통선발을 통해 육성하였다. 품종의 특성검정은 2005년부터 2007년까지 봄 촉성재배와 가을 억제재배 조건아래서 3회에 걸쳐 조사하였다. 'Noble Wine' 품종의 자연개화기는 10월26일경이며, 일장조절에 의해 주년재배가 가능하다. 꽃 크기가 5.4 cm인 소륜으로 꽃 하나의 꽃잎수가 21.6개정도이고 착화수도 28.5개로 많은 편이다. 화색은 복색(백색/적색)이며, 녹색화심을 가졌다. 봄의 단일상태에서 'Noble Wine' 품종의 개화소요일수는 45일 정도이며, 가을 절화수명은 21.3일로 나타났다.

• 화훼연구
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• 제18권3호
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• pp.211-215
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• 2010

'Maigic' 품종은 경남농업기술원 화훼연구소에서 복색 홑꽃인 'Artist Pink'를 모본, 복색 홑꽃인 'SP0347'을 부본으로 인공교배를 실시하여 2003년에서 2007년에 걸쳐서 파종과 계통선발을 통해 육성하였다. 품종의 특성검정은 2005년부터 2007년까지 봄 촉성재배와 가을 억제재배 조건아래서 3회에 걸쳐 조사하였다. 'Maigic' 품종의 자연개화기는 10월26일경이며, 일장조절에 의해 주년재배가 가능하다. 꽃 크기가 6.1 cm인 중륜화로 꽃 하나의 꽃잎수가 31.6개정도이고 착화수는 14개 정도이다. 화색은 복색(백색/자주색)이며, 녹색화심을 가졌다. 봄의 단일상태에서 'Maigic' 품종의 개화소요일수는 43일 정도로 개화가 빠르며, 가을의 절화수명은 20.6일로 나타났다.