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신축 공동주택에서 플러쉬아웃에 따른 폼알데하이드 농도 저감 효과에 관한 연구 (Effects of Flush-out in the Reduction of Formaldehyde in Newly Built Residential Buildings)

  • 박상인;김주한;박준석
    • 설비공학논문집
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    • 제30권3호
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    • pp.116-122
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    • 2018
  • The purpose of this study was to confirm the effects of flush-out in the reduction of formaldehyde concentration in newly built residential buildings. The field measurements were conducted on two complexes of multi-residential buildings which are located in the suburban area of Seoul. About eight samples of residential buildings were selected to measure the changes in formaldehyde concentrations after flush-out from the two apartment complexes. The concentration of formaldehyde was measured using DNPH cartridge and HPLC. From the results of the field measurements, it was established that indoor formaldehyde concentration decreases 27.6~54.2% in the samples after flush-out. The number of days that the flush-out were conducted was noted to have no significant influence on the reduction rate of formaldehyde concentration when the flush-out continued more than 7 days. The comparison with Bake-out showed that flush-out also can reduce formaldehyde in newly built buildings as same levels of it.

신규간호사의 임상수행능력과 현장적응의 관계에서 전문직업성의 매개효과 (The Mediating Effect of Professionalism in the Relationship between Clinical Competence and Field Adaptation in Newly Graduated Nurses)

  • 김영순;박경연
    • 간호행정학회지
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    • 제19권4호
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    • pp.536-543
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    • 2013
  • Purpose: The purpose of this study was to identify the mediating effect of professionalism in the relationship between clinical competence and field adaptation in newly graduated nurses. Methods: The participants in this study were 213 nurses from four tertiary hospitals who had less than 12 months of nursing experience. Data were collected during January and February, 2013. A structured questionnaire was used for data collection and data were analyzed using descriptive statistics, Pearson correlation coefficients, and path analysis with the SPSS/WIN 21.0 and AMOS 21.0 programs. Results: The mean score for clinical competence was $2.85{\pm}0.25$, for professionalism, $3.10{\pm}0.30$, and for field adaptation, $2.79{\pm}0.37$. There was a significant positive relationship between clinical competence and field adaptation. Also, professionalism was positively correlated with field adaptation. Professionalism showed mediating effects between clinical competence and field adaptation. Improvement of clinical competence increased professionalism and the increased professionalism raised the field adaptation. Conclusion: Based on these findings, orientation programs including strategies to increase professionalism, should be established to promote effective field adaptation in newly graduated nurses. These orientation programs can strengthen professionalism, the mediator between clinical competence and field adaptation in newly graduated nurses.

Corrosion evaluation of a newly developed high-strength steel in marine environments

  • Jeong, Jin-A;Ko, Kwon-Heum;Lee, Du-Young;Lee, Sang-Il
    • Journal of Advanced Marine Engineering and Technology
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    • 제40권10호
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    • pp.883-887
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    • 2016
  • This study aims to evaluate the corrosion behavior of a newly developed high-strength steel in marine environments. Metals used in seawater are easily deteriorated because of the presence of corrosive species such as chloride ions in it. Seawater causes much higher corrosion than fresh water. Thus, the corrosion of steel in marine environment has been recognized as a crucial problem in designing structures which cannot be cathodically protected. In this study, the corrosion resistance of a newly developed high-strength steel was evaluated. Four different specimens were tested to confirm the corrosion resistance. The exposure corrosion test was carried out by exposing the specimens to different marine environments such as atmospheric, tidal, splash, and submerged zones for two years. The specimens taken out from each location were cleaned ultrasonically and chemically prior to the evaluation of their corrosion resistance by the weight loss method. Finally, the pitting depth of the specimens was also measured to evaluate their pitting corrosion. The conditions used for the corrosion test were similar to the environmental conditions. The corrosion test results revealed that the corrosion rate and pitting corrosion of the newly developed high-strength steel was lower than that of the other carbon steels.

창원지역 신축학교의 실내공기질 현장평가 연구 (A Study on the Field Evaluation about the Indoor Air Quality of Schools Newly Built in Changwon)

  • 유종훈;강은혜;손영환;하석용;최정민
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2006년도 하계학술발표대회 논문집
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    • pp.1244-1249
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    • 2006
  • Because students are spending more time in their classroom for learning and study, indoor air quality problems in school classrooms are very important. when the classroom is built for the first time, namely newly built school, the selection of inside finishing material is directly connected with indoor air quality problems especially with HCHO and TVOC. But until now, there is no plenty of study about this. Moreover, there are some concerns about the desks and chairs which are used in classroom will affect the air quality. but almost no study is being made at all Therefore, this study focuses on the field survey and analysis of classroom indoor air quality in newly built schools in Changwon. In this study filed surveys and analysis are conducted as follows. 1) The effect of the material difference in general classroom. 2) The effect of the material and loading ratio difference in special classroom. 3) The effect of the desks and chairs in general classroom.

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중국어 신조어와 '80후(後)'의 문화 소고(小考) (Thoughts on the Culture of Post-80s Generation and Newly Created Words)

  • 김순진;한용수
    • 비교문화연구
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    • 제39권
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    • pp.355-380
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    • 2015
  • China has been experiencing a series of changes after gradually opening up its society. Such changes have now seeped into almost every sector of the society, leading to overall change. While the political system has been maintained without much change, the structure of life for Chinese has undergone a shift, especially in the sectors related to industry or the economy. The Chinese have adopted capitalism in their own way, leading to fast growth in their industries. Those who were born in the 1980s amidst such change (so-called the post-80s generation) are now playing a major role in Chinese society. Understanding this generation can help understand some of the most important phenomena in today's China. Therefore the language used by this generation is in particular meaningful as language often reflects the society it is used in. This study focuses on the newly created words arising from the lifestyles of the post-80s generation to better understand how the China's move towards a more open society over the past three decades have brought about changes. The work culture and consumption styles of the post-80s generation are also showing some collective characteristics. As such, a review of newly created Chinese words related to this generation is expected to increase understanding of the overall Chinese society and Chinese culture of today.

개선된 Ferron 분석 비교를 통한 Al(III) 가수분해종 특성 연구 (Comparison of the characteristics of Al(III) hydrolyzed species by improved ferron assay test)

  • 윤미형;강임석
    • 상하수도학회지
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    • 제36권3호
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    • pp.177-186
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    • 2022
  • In this study, newly improved Ferron assay test haved on timed spectrometry was used for the determination of hyolrolytic Al species presented in PACl coagulant. The color development reagent ferron was prepared by using conventional method and two newly developed methods. Then the ferron assay test was used to compare and analyze the distribution of Al(III) hydrolyzed species presented in the prepared PACl and alum. The preparing method of reagent A required an aging period of 7 days by adding a hydroxylamine hydroxide and a 1,10-phenanthroline monohydrate reagent, whereas the preparing method of reagent B was used as a coloring agent immediately without aging time. The regression analysis between UV absorbance and Al concentrations of conventional method and newly developed method of ferron reagents in low-concentration aluminum solutions and high-concentration aluminum solutions, showed the correlation coefficients of 0.999 or higher, as showing high correlations of conventional method and newly developed method. Applying Ferron assay test, Al species in the PACls and alum were classified as Ala(monomeric Al), Alb (polymeric Al), and Alc (colloidal and precipitated Al). Distribution of Al(III) hydrolyzed species according to the preparation of ferron colorimetric reagents was similar.

처음 진단받은 여성 유방암 환자와 갑상선암 환자에서 나타나는 불안, 우울 및 불면 증상 (An Anxiety, Depressed Mood, and Insomnia in Newly Diagnosed Women Breast Cancer Patients and Thyroid Cancer Patients)

  • 박소현;최희연;임원정;문병인;임우성
    • 생물정신의학
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    • 제24권4호
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    • pp.204-211
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    • 2017
  • Objectives In this study, we identified the symptoms of insomnia, anxiety, and depressed mood in newly diagnosed women breast and thyroid cancer patients. Methods The subjects of this study were 1794 women patients who visited the Ewha Womans University Cancer Center for Women. They included 1119 newly diagnosed primary breast cancer patients and 675 newly diagnosed primary thyroid cancer patients. The patients completed the National Cancer Center Psychological Symptom Inventory (NCC-PSI) during their first follow-up visit after surgery, before starting chemotherapy or radiotherapy. The NCC-PSI is composed of the modified distress thermometer (MDT) and the modified impact thermometer (MIT) for insomnia, anxiety, and depressed mood. Results Anxiety severity was found to be greater in breast cancer patients than in thyroid cancer patients. Significant levels of anxiety, depressed mood and insomnia were present in 28, 24.5, and 20.7% in all the subjects, respectively. Moreover, anxiety symptoms, depressed mood and insomnia interfered with the daily lives of 20, 18.4, and 14.2% of all the subjects, respectively. Dealing with anxiety (18.8%) was found to need the most help, followed by dealing with insomnia (8.9%) and depressed mood (8.7%). Conclusions A significant level of distress was found in about 40% of the total subjects. Nearly 30% of newly diagnosed breast cancer patients reported significant anxiety symptoms and interferences with daily living caused by anxiety, which most commonly needed special care. Early assessment and management of psychological distress, especially anxiety, in breast and thyroid cancer treatment are very important to establish integrated cancer care.

유기물(有機物) 시용(施用)이 땅콩 생육(生育)에 미치는 영향(影響) (Effects of Organic Materials Application on Growth of Peanut Plant)

  • 황남열;채재석;소재돈
    • 한국토양비료학회지
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    • 제18권2호
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    • pp.215-220
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    • 1985
  • 숙전(熟田)과 신야산개간지(新野山開懇地) 토양(土壤)에서 유기물(有機物) 종류별(種類別) 시용(施用)이 땅콩의 생육(生育)과 수량(收量) 그리고 토양화학성(土壤化學性)에 미치는 효과(效果)를 검토(檢討)한 결과(結果)는 다음과 같다. 1. 숙전(熟田)에서는 신선(新鮮)한 유기물(有機物)인 볏짚, 왕겨 시용이 수량(收量)을 증가(增加)시켰으나 야산개간지(野山開墾地)에서는 퇴비(堆肥) 시용(施用)이 수량(收量)을 증가(增加)시켰다. 2. 야산개간전(野山開墾田)에서 C/N율(率)이 높은 볏짚, 왕겨 시용구(施用區)가 근류(根瘤) 착생량(着生量)이 많았다. 3. 유기물(有機物) 함량(含量)이 많을수록 야산개간전(野山開墾田)에서 수량(收量)이 증가(增加)되었으나 숙전(熟田)은 경향이 없었다. 4. 시험후(試驗後) 토양중(土壤中) 유기물(有機物) 함량(含量)은 숙전(熟田)에서는 변화(變化)가 없었으나 야산개간전(野山開墾田)은 약간 증가(增加)되는 경향(傾向)이었다.

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일 보건소의 신혼부부 건강프로그램의 효과 (The Effect of Health Care Program for Newly Married Couple in a Community Health Care Center)

  • 임재란;김현리
    • 지역사회간호학회지
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    • 제19권2호
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    • pp.188-195
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    • 2008
  • Purpose: The research purpose was analysis of the effect of a health education program for newly-married executed from 2003 to 2005 as a part of health care service from community health center and providing the fundamental source for health education needed during newly-married. Method: The data collection with structured questionnaires was conducted during October to December in 2006. From the health center 106 brides who participate the program and 130 brides who didn't participate. Health care program for newly married couple were composed health examinations and health educations. Health examinations were CBC, LFT and Ag & Ab prevallence rates of hepatitis B, rubella. Health educations were done two times, the first individual health education was done at enrolled in health center for establishment of desirable couple relationship, family planning, contraception method and management of pre-pregnancy. The second individual health education was done for explanation of blood examination results, prevention of the congenital deformity and the vertical transmission of hepatitis B, management for pregnancy, breast feeding method, introduction to safety delivery method and encouraging self-study using by materials made by health center after two weeks at revisiting health center. SPSS/PC(ver. 12.0) and $X^2$-test, t-test was used to analyze the collected and tabulated data. Socio-demographic characteristics and regional characteristics of residence area of two groups shows no significant difference. Result: As a variables of experimental effect. The natural childbirth rates of participants group was significantly higher than Non-participants group(p=.012). Breast feeding rates for participants group was also statistically significant higher than Non-participants group. Contraception rates showed no significant difference. The rubella vaccination rates (p=.001) and The hepatitis B vaccination rates (p=.012) shows statistical differences. Conclusion: Therefore health care program for newly married couple in a community health care center was effective generally. We supposed that explore participation ways for nonparticipants, expand the program to community health care center in whole country.

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신축 아파트의 총휘발성유기화합물 농도와 관련요인 분석 (Analysis on TVOC Concentrations and Influence Factors of Newly-Built Apartments)

  • 최윤정;강미라;이혜민;안혜정
    • 한국실내디자인학회:학술대회논문집
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    • 한국실내디자인학회 2006년도 춘계학술발표대회 논문집
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    • pp.268-271
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    • 2006
  • The purpose of this study was to identify the influence of living factors on TVOC(Total Volatile Organic Compounds) concentrations for newly-built apartments. The field measurements of TVOC concentrations were made totally 30 times(5 times per one subject house) in six apartment units in which residents recently moved. Those apartments authorized its business approval before May 2004, the Act of Indoor Air auality Management for multi-use facilities. The findings were as follows: The TVOC concentrations of the measured subject apartments ranged from about 1/10 of the recommended standard for multi-use facilities($400{\mu}g/m^3$) to up to 90 times as high as the standard. Since then, the Recommended Standard of Indoor Air Quality Management for newly-built apartment house was announced in December 2005. In accordance with this standard($2390{\mu}g/m^3$) it ranged from about 1/100 to up to 15 times as high as the standard. The subject house whose TVOC concentrations reduced below the recommendation standard in the shortest period had the largest amount of ventilation (all the windows were open for ventilation in the past three months) among ail measured houses. The reason of another house whose TVOC concentrations were much higher than the rest was fronted with new furniture in the room. It's recommended that they should open all the windows for at least three months for ventilation in newly-built houses, and it would be better to avoid remodeling than needs be.

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