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REMEDIATION OF GROUNDWATER CONTAMINATED WITH BENZENE (LNAPL) USING IN-SITU AIR SPARGING

  • Reddy, Krishna R.
    • 한국지하수토양환경학회:학술대회논문집
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    • 한국지하수토양환경학회 2003년도 추계학술발표회
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    • pp.11-24
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    • 2003
  • This paper presents the results of laboratory investigation performed to study the role of different air sparging system parameters on the removal of benzene from saturated soils and groundwater. A series of one-dimensional experiments was conducted with predetermined contaminant concentrations and predetermined injected airflow rates and pressures to investigate the effect of soil type and the use of pulsed air injection on air sparging removal efficiency. On the basis of these studies, two-dimensional air sparging remediation systems were investigated to determine the effect of soil heterogeneity on the removal of benzene from three different homogeneous and heterogeneous soil profiles. This study demonstrated that the grain size of the soils affects the air sparging removal efficiency. Additionally, it was observed that pulsed air injection did not offer any appreciable enhancement to contaminant removal for the coarse sand; however, substantial reduction in system operating time was observed for fine sand. The 2-D experiments showed that air injected in coarse sand profiles traveled in channels within a parabolic zone. In well-graded sand the zone of influence was found to be wider due to high permeability and increased tortuosity of this soil type. The influence zone of heterogeneous soil (well-graded sand between coarse sand) showed the hybrid airflow patterns of the individual soil test. Overall, the mechanism of contaminant removal using air sparging from different soil conditions have been determined and discussed.

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The Effects of a Maternal Self-Efficacy Promotion Program on Maternal Confidence and Mother-Infant Interaction

  • Kim, Hee-Soon;Oh, Ka-Sil;Yoo, Il-Young;Kim, Dong-Hee;Chae, Sun-Mi;Jin, Ju-Hye;Kenner, Carole;Kim, Mi-Ja
    • Child Health Nursing Research
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    • 제12권2호
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    • pp.189-195
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    • 2006
  • Purpose: The purpose of this study was to examine the effect of a maternal self-efficacy promotion program for Korean primiparas on maternal confidence and mother-infant interaction. Method: This study was non-equivalent quasi-experimental research with a control group selected by purposive sampling. Based on Bandura’s (1986) self-efficacy theory, the research team developed the maternal self-efficacy promotion program. The program included achievement experiences, verbal persuasion, and vicarious experiences. The program was provided through face-to-face teaching at the time of discharge, counseling sessions over the telephone, and a home visit. Subjects also learned about parenting skills using a videotape developed by the research team. Sixteen primiparas were recruited to the experimental group at one hospital in Kyongi province, and fifteen primiparas who were matched according to socioeconomic status were recruited to the control group at a postpartum care center in the same province. Results: Subjects in the experimental group demonstrated significantly higher maternal confidence and mother-infant interaction than those in the control group. Conclusion: The maternal self-efficacy promotion program appears to be an effective nursing intervention for parenting of first-time mothers in Korea.

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요양시설 노인의 시설적응을 위한 임파워먼트 프로그램의 효과 (Effects of an Empowerment Program on the Adjustment of Older Adults to Nursing Home Life)

  • 장애경;박연환
    • 대한간호학회지
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    • 제42권4호
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    • pp.559-567
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    • 2012
  • Purpose: This study aimed to evaluate the effectiveness of the empowerment intervention on the levels of self-esteem, interpersonal relationships and adjustment to nursing home life of the Korean nursing home residents. Methods: Participants (n=47) whose period of stay was less than one year were purposefully selected from 3 nursing homes in Korea. The experimental group (n=21) attended 10 weekly hour-long empowerment sessions. The empowerment program comprised two components; group education and group discussion. The control group (n=26) received a two-hour education about health management. Results: Compared with the control group, the experimental group showed significantly higher mean scores of selfesteem (t=5.51, p<.001), interpersonal relationships (t=2.73, p=.009) and adjustment to nursing home life (t=2.10, p=.041). Conclusion: Findings of this study suggest that empowerment interventions may be effective in enhancing nursing home residents' self-esteem, interpersonal relationships and adjustment to nursing home life. Future research is needed to determine if such an empowerment program could be used with newly institutionalized elders to speed as well as enhance their adjustment to nursing home life.

Needs for Home Care Nursing in the Vulnerable Elderly

  • Lee, Ji-Hyun;Jeong, Youn-Hee;Park, Geum-Ja;Kwon, Sook-Hee
    • 대한간호학회지
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    • 제37권2호
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    • pp.201-207
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    • 2007
  • Purpose. The purpose of this study was to determine the subjects' health status according to the needs of visiting health and the function of the family in home care nursing. Sample and Method. The data collection period was from 07/01/04 to 10/31/04 and the subjects were 488 of those above 60 years of age staying at home or living alone who registered at a visiting health service of public health center at an urban area in Korea. This survey was carried out by visiting health nurses and participation was agreed on by the elderly people. Results. The extent of the subjects' total health status to the general characteristics had differences according to the age, sex, monthly income, perceived health status, known functional disorder, and yes-or-no for disease. At all health status domains, visiting health need care in the group I was very lower than one in II, III, or IV groups. Also the severe dysfunctional family was lower than lightly dysfunctional family and normal functional family in all health status domains. Conclusion. Nurses must provide their characteristics considered nursing intervention for the elderly who have high visiting health needs and severe dysfunctional family with vulnerable health care.

노인 운동가에 있어 장기적인 운동에 따른 척추, 힙과 신체 총 골밀도 감소에 관한 재현성 (Reproducibility of Measures of Lumbar Spine, Hip and Whole Body BMD according to Longitudinal Physical Activity in Older Athletes)

  • 정연수
    • 근관절건강학회지
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    • 제8권2호
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    • pp.278-286
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    • 2001
  • With the aging of society a great deal of interest is being placed on the value of longitudinal data in evaluating physiological losses. We present data on test-one/test-two reliability and reproducibility for measures of training, bone density from a longitudinal study of master athletes. Fifty-two males (mean age at test $1=58.2{\pm}9.8\;years$) and thirty-two females ($54.4{\pm}8.8\;years$) were selected from the study population. Bone mineral density was determined using DEXA (Hologic 1500). The characteristics of the subjects are presented below as $means\;{\pm}\;S.D$. The data was imported into the Statistical Package for the Social Science (SPSS 9.0, Chicago, IL). Paired t-tests were performed between visit 1 and visit 2 in subjects. Pearson correlations were performed. The results of this study indicate the measures of training history, body mass and bone density are reasonably stable and reproducible. We conclude that body composition and bone density parameters are stable and reproducible over time in active older subjects. Physiologic measures in master athletes are fairly stable, and reproducible over time Longitudinal studies investigating age-related changes in master athletes need to be conducted on a time schedule of greater than two years.

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루이스 설리반과 아돌프 로스의 '기능'과 '장식'의 진의(眞意)와 그 연관성에 관한 고찰 (The meaning of Sullivan's function and Loos' ornament - Focused on Louis Sullivan's Carson Pirie Scott Store(1898-1904) & Adolf Loos' Goldman&Salatsch Store(1909-1911) -)

  • 강태웅
    • 건축역사연구
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    • 제17권5호
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    • pp.55-69
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    • 2008
  • One of the most notable architectural aphorisms in modern period must be undeniably Louis Sullivan's, 'Form Follows Function.' The aphorism has been not only an important source of new aesthetic but also an formal principle of machine age. Other most famous source in order to justify modern aesthetic was the short essay by an cynical critic, Adolf Loos(1870-1933), 'Ornament and Crime' of 1908. Apart from what the essay asserted it is also famous for the influence of Sullivan's architectural notion during Loos' States staying. For Architectural historians of the early 20th century this connection is so useful to create a legacy of modern architecture. The historians seemed to believe that Loos understanded Sullivan's aphorism on which the historians wanted to focused. When we however look into two buildings designed and built in the period of publishing both aphorism and essay there must be a big fissure between the buildings and the historians interpretations. With this view point this study aims at showing the true meanings of Sullivan's aphorism and Loos' essay and also the big difference between the machine age's aesthetic and theirs.

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베이비부머의 라이프스타일과 은퇴 후 선호하는 주거특성 - 재미 한인 베이비부머를 중심으로 - (Baby Boomers' Lifestyles and Preferred Characteristics of Postretirement Homes - With a Focus on Korean-American Immigrants -)

  • 김미희;김석경
    • 한국주거학회논문집
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    • 제24권3호
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    • pp.85-94
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    • 2013
  • This research investigates and characterizes lifestyles and housing preferences of Korean-American Baby Boomers in the USA, and proposes future housing design and planning directions to meet their needs. A questionnaire survey was conducted from June to September 2012 examining lifestyles and preferred characteristics of postretirement homes. We targeted Korean-Americans born from 1955 to 1963 in either Korea or the USA who currently reside in New York, Washington DC, Chicago, Dallas, Detroit, Lansing, Grand Rapids, and San Francisco. To analyze the 247 responses, we employed factor analysis, cluster analysis, one-way ANOVA, and crosstabs. Respondents preferred three-bedroom, singlefamily housing types with a size of 26-35 pyong, favoring city outskirts or suburbs over urban areas. Four groups having different lifestyle types were identified: innovators, believers, fashion experiencers, and makers. Housing preference differed depending on lifestyle types. The 'innovator' group desired homes 56 pyong or larger, while the other groups preferred 26-36 pyong. The four lifestyle groups did not show statistically significant differences in most of preferred housing features, community facilities, or indoor environmental characteristics. Each group still showed slightly different preferences in some housing planning characteristics, which future planners can refer to when providing postretirement homes for them.

방사성탄소연대측정 (Radiocarbon Dating)

  • 이현주;황진주;백현주
    • 보존과학연구
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    • 통권23호
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    • pp.197-214
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    • 2002
  • It is very important to determine the age of the Cultural Properties in archeology. In about 1950, W.F. Libby and a team of scientists at the University of Chicago developed the Radiocarbon Dating technique. Radiocarbon($^14$C) Dating is probably one of the most widely used and best known absolute dating methods. Radiocarbon ages are conventionally specified to the year 1950. This year is 0 BP year. BP is the initial of Before Present. The $^14$C within an organism is continually decaying into stable carbon isotopes. When $^14$C decays, it emits a $\beta$ - particle with an energy content of 156 KeV and becomes 14N. Only the $\beta$ - particle is detected by Liquid Scintillation Counting. $^14$C has a half life of 5730 years. It has been used to date samples as old as 50,000 years. Radiocarbon determinations can be obtained on organic material : wood, charcoal, shell, etc. The results of radiocarbon dating using Benzene Synthesizer and Liquid Scintillation Counter are KCP539 $4030\pm60$BP year, KCP540 $3980\pm60$BP year, KCP575 $4870\pm50$, KCP576 $100\pm50$BP year, KCP577 $130\pm50$BP yea and KCP578 $210\pm70$BP year.

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A Pilot Examination of Oxidative Stress in Trichotillomania

  • Grant, Jon E.;Chamberlain, Samuel R.
    • Psychiatry investigation
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    • 제15권12호
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    • pp.1130-1134
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    • 2018
  • Objective Trichotillomania is a relatively common illness whose neurobiology is poorly understood. One treatment for adult trichotillomania, n-acetyl cysteine (NAC), has antioxidative properties, as well as effects on central glutamatergic transmission. Preclinical models suggest that excessive oxidative stress may be involved in its pathophysiology. Methods Adults with trichotillomania provided a blood sample for analysis of compounds that may be influenced by oxidative stress [glutathione, angiotensin II, ferritin, iron, glucose, insulin and insulin growth factor 1 (IGF1), and hepcidin]. Participants were examined on symptom severity, disability, and impulsivity. The number of participants with out-of-reference range oxidative stress measures were compared against the null distribution. Correlations between oxidative stress markers and clinical measures were examined. Results Of 14 participants (mean age 31.2 years; 92.9% female), 35.7% (n=5) had total glutathione levels below the reference range (p=0.041). Other oxidative stress measures did not have significant proportions outside the reference ranges. Lower levels of glutathione correlated significantly with higher motor impulsiveness (Barratt Impulsiveness Scale sub-score) (r=0.97, p=0.001). Conclusion A third of patients with trichotillomania had low levels of glutathione, and lower levels of glutathione correlated significantly with higher motor impulsiveness. Because NAC is a precursor for cysteine, and cysteine is a rate limiting step for glutathione production, these results may shed light on the mechanisms through which NAC can have beneficial effects for impulsive symptoms. Confirmation of these results requires a suitable larger follow-up study, including an internal normative control group.

記憶とパワーのジェンダーポリティックス: 東アジアの国際関係において日本の平和憲法と慰安部問題の意味づけ (Gendered Politics of Memory and Power: Making Sense of Japan's Peace Constitution and the Comfort Women in East Asian International Relations)

  • 金泰柱;李洪千
    • 분석과 대안
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    • 제4권2호
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    • pp.163-202
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    • 2020
  • This paper examines how Japanese society produced and reproduced a distinctively gendered history and memories of the experience of WWII and colonialism in the postwar era. We argue that these gendered narratives, which were embedded in postwar debates about the Peace Constitution and comfort women, have engendered contradictions and made the historical conflicts with neighboring countries challenging to resolve. On the one hand, this deepens conflict, but on the other, it also generates stability in East Asia. After Japan's defeat in WWII, the American Occupation government created the Peace Constitution, which permanently "renounces war as a sovereign right of the nation and the threat or use of force as means of settling international disputes." The removal of the state's monopoly on violence - the symbol of masculinity - resulted in Japan's feminization. This feminization led to collective forgetting of prewar imperialism and militarism in postwar Japan. While collectively forgetting the wartime history of comfort women within these feminized narratives, the conservative movement to revise the Peace Constitution attempted to recover Japan's masculinity for a new, autonomous role in international politics, as uncertainty in East Asia increased. Ironically, however, this effort strengthened Japan's femininity because it involved forgetting Japan's masculine role in the past. This forgetting has undermined efforts to achieve masculine independence, thus reinforcing dependence on the United States. Recurrent debates about the Peace Constitution and comfort women have influenced how Japanese political elites and intellectual society have constructed distinctive social institutions, imagined foreign relations, and framed contemporary problems, as indicated in their gendered restructuring of history.

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