• 공업화학
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• 제7권2호
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• pp.221-227
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• 1996

N-아실 아미노산계 음이온성계면활성제 중 sodium N-acyl-N-methyl-${\beta}$-alaninate, sodium N-acyl sarcosinate 그리고 sodium N-acyl-N-methyl taurate 유도체 12종을 선택하여 묽은 수용액내에서 임계미셀농도와 미셀화 영역을 결정하는 새로운 방법으로서 컴퓨터프로그래밍에 의한 표면장력 곡선의 최대화를 제안하였다. 임계미셀농도와 미셀화 영역은 몇몇 실험치를 직접 프로그램에 대입함으로써 곡선의 최대화에 의해서 이론적으로 산정할 수 있다. 이론적으로 구한 임계미셀농도값들은 실측치와 거의 일치함을 알 수 있다.

• 한국콘텐츠학회논문지
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• 제10권9호
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• pp.57-67
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• 2010

스마트 그리드 기술은 소비자의 에너지 사용을 실시간으로 감시하고 비사용 기간 동안 차단 요구에 응답할 가정용 기기와 통신함으로써, 에너지 효율을 가정으로까지 확대해 준다. 그러나, 스마트 그리드에서 수집된 정보는 개인 정보의 라이브러리 형태가 될 것이므로 이것을 잘못 다루게 되면 소비자의 개인정보를 크게 해칠 수 있다. 소비자 중심의 투명성과 통제의 원칙이 처음부터 끝까지 필수 설계 원칙으로 취급되지 않는다면 중대한 우려가 있을 것이다. 본 논문에서는 All-Or-Nothing Transform(AONT) 암호화 모드의 특성을 이용하여 스마트 그리드 환경에서의 안전한 소비자 정보보호를 제공하기 위한 효율적인 데이터 분산 보안 관리방안을 제안한다. 본 논문에서 제안된 알고리즘은 처리속도 측면에서 데이터의 고속 분산 및 복원이 가능하며, 각 비밀조각 사이즈의 총합이 평문과 동일하여 스마트 그리드 시스템의 개인 데이터 처리에 적합하다.

• 한국콘텐츠학회논문지
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• 제20권5호
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• pp.171-180
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• 2020

본 연구는 농촌지역 생활공동체 거주 노인들의 생활만족도에 공동체 특성이 미치는 영향을 파악함에 주목한 연구이다. 분석에 활용한 자료는 전라북도 농촌 노인 생활공동체에 거주하는 노인들을 대상으로 수집한 서베이 자료이다(사례 수 670명). 구체적인 분석에는 공동체 특성 변수들은 독립변수, 생활만족도를 종속변수, 개인 특성은 통제변수로 설정한 다중회귀분석모델을 적용하였다. 분석결과는 공동체 특성 중에서는 프로그램, 구성원간 상호지원, 물리적 공간 만족도, 지역공동체 의식, 구성원간 갈등, 가사노동 부담감 등이 생활공동체 거주 노인의 생활만족도에 유의미하게 영향을 미침을 확인할 수 있었다. 아울러, 주관적 건강, 월평균 소득, 혼인상태(사별) 등의 개인 특성 변수들 또한 유의미 영향을 미치는 것으로 확인되었다. 이와 같은 분석결과는 농촌 생활공동체의 특성들이 거주 노인들의 생활만족도에 주요한 영향 요인임을 보여주는 바로, 농촌 노인 생활공동체의 성과 제고를 위해서는 거주 노인들간 상호관계 향상, 프로그램들의 개발 및 실행, 물리적 공간의 개선 등 생활공동체 측면들에의 개선이 적극 필요함을 시사하여 준다.

• 한국지역사회생활과학회지
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• 제23권3호
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• pp.347-356
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• 2012

This study was conducted to investigate pregnant women's experience about nutrition education for pregnant women in order to improve nutrition education programs. The questionnaires were distributed to 185 women with children whose age of under 24 months. About 46% of respondents participated in nutrition education for pregnant women. Major reasons for nonparticipation was 'no information(47%)' and 'lack of time(32%)'. About 40% of women attended to education operated by health centers, 34% maternity hospitals, 26% companies of formula or baby supplies. Participation rate in nutrition education showed significant differences(p<0.05) with age and household income. Women in their forties and with monthly income over three million Won showed higher rates than those of women in other groups. The subjects of education were nutrient supplements for pregnant women(21%), pregnancy complications and health(19%), abnormal symptoms of pregnancy and nutrition (18%), weight gain during pregnancy(17%), dietary guideline and directions for pregnancy (15%), relationship between nutrition of pregnant woman and baby's health(10%) in order. Teaching method which was used most frequently was lecture(35%). About 74% of women were not satisfied with the education. Nutrition management for pregnancy was the subject which pregnant women wanted to learn but not been taught enough. About 80% of women wanted more education and preferred personalized education such as personal counselling (30%), home visitation(26%), telephone(16%) and internet(15%) counselling. These results showed nutrition education for pregnant women was unhelpful for practical life. Therefore, nutrition education programs for pregnant women has to reflected pregnant women's individual needs to heighten the effectiveness of nutrition education.

• 대한가정학회지
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• 제35권5호
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• pp.73-102
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• 1997

The purpose of this study was to identify the specific and empirical contents in terms of first-married stepmother about her stress and efforts to adapt to her stepfamily. This studies relied on the qualitative research method in order to approach stepmother's subjective experience. There were 6 stepmother respondents who were 6 first-marrieds living in Seoul or Kyoungki area. The data was collected by in-depth personal interview.‘Open coding process’, a part of grounded theory procedures were used to analyzed the data. The major findings can be summarized as follows: 1. When focused o stressors, the stress of stepmothers were categorized into 4 categories. Those were the following: 1 When focused on stressors, the stress of stepmothers were categorized into 4 categories. Those were the following: (1) Stepmother's own problem such as stepmother' identity problem; (2) Problems within stepfamily such as problems about relations with husbands, stepchildren, and her own children; (3) Problems of stepmother family's kin such as relational problems with former spouses, in-laws, and her parent; (4) Problems of social relationship such as isolation and alienation in social relationship and neighbors' prejudice about stepmother. 2. In overcoming stress from stepfamily life and adapting to it, 4 categories were identified as important. Contents of 4 categories were such like this: (1) Stepmother's own efforts - (a) give a positive meaning to marriage or remarriage (b) flexible personality (c) situation-accepting attitude (d) exclusive management of household income (e) job (f) perseverance for time to adaptation; (2) Positive feedback within stepfamily - (a) supportive husband (b) sense of unity as a couple (c) psychological reward from stepchildren (d) existence of stepmother's own child (e) behavior for family solidarity (f) family-centered religious life; (3) Stepfamily's relationship with former spouses such as breakdown in relationship with ex-wives or ex-husbands; (4) Support from stepmothers' kin and people in social network with stepmothers. It was concluded that to reduce stress and to help adapt to stepfamily, stepmother should make an effort, and that her stepfamily and her kin should cooperate and support. In addition, negative stereotype of stepmother and stepfamily should disappeared. It was suggested that studies on stepfamily should be vitalized and that programs for preparing remarriage and counseling for stepfamily should be spread.

• Biomolecules & Therapeutics
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• 제24권1호
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• pp.99-107
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• 2016

Triclosan is an antimicrobial or sanitizing agent used in personal care and household products such as toothpaste, soaps, mouthwashes and kitchen utensils. There are increasing evidence of the potentially harmful effects of triclosan in many systemic and cellular processes of the body. In this study, we investigated the effects of triclosan in the survivability of cultured rat neural stem cells (NSCs). Cortical cells from embryonic day 14 rat embryos were isolated and cultured in vitro. After stabilizing the culture, triclosan was introduced to the cells with concentrations ranging from $1{\mu}M$ to $50{\mu}M$ and in varied time periods. Thereafter, cell viability parameters were measured using MTT assay and PI staining. TCS decreased the cell viability of treated NSC in a concentration-dependent manner along with increased expressions of apoptotic markers, cleaved caspase-3 and Bax, while reduced expression of Bcl2. To explore the mechanisms underlying the effects of TCS in NSC, we measured the activation of MAPKs and intracellular ROS. TCS at $50{\mu}M$ induced the activations of both p38 and JNK, which may adversely affect cell survival. In contrast, the activities of ERK, Akt and PI3K, which are positively correlated with cell survival, were inhibited. Moreover, TCS at this concentration augmented the ROS generation in treated NSC and depleted the glutathione activity. Taken together, these results suggest that TCS can induce neurodegenerative effects in developing rat brains through mechanisms involving ROS activation and apoptosis initiation.

• 공업화학
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• 제8권6호
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• pp.881-885
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• 1997

본 연구에서는 유용성 염료인 sudan III를 이용하여 비이온 계면활성제인 GL-12와 범용 음이온 계면활성제인 linear laurylbenzene sulfonate(LAS) 또는 sodium polyoxyethylene(3) glycol lauryl ether sulfate (SLES) 혼합 용액의 가용화력에 대하여 조사하였다. 두 계면활성제 혼합계 (GL-12/LAS, GL-12/SLES)의 가용화력은 각각 계면활성제 혼합비에 크게 영향을 받았으며 GL-12의 함량이 증가할수록 가용화력도 증가 하였다. 용액의 가용화력에 NaCl이 미치는 영향으로부터 GL-12/LAS계에서는 solubilizate인 sudan III가 가용화 후 미셀내 palisade 층 근처에 위치하고 GL-12/SLES 혼합계에서는 solubilizate가 미셀의 core부근에 위치함을 알 수 있었고 이는 LAS와 SLES의 분자구조 차이에 기인한다.

• 한국중재학회지:중재연구
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• 제13권2호
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• pp.291-319
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• 2004

The seller may take a warranty with respect to the goods. If they are not as warranted, they may be held liable for the breach of warranty. Even when they has not made a warranty, the law will in some instances hold them responsible as though they had made a warranty. An express warranty is a part the basis for the sale. That is, the buyer has purchased the goods on the reasonable assumption that they were as stated by the seller. When the buyer intends to use the goods for a particular or usual purpose, as contrasted with the ordinary use for which they are customarily sold, the seller makes an implied warranty that the goods will be fit for the purpose when the buyer relies on the seller's skill or judgment to select or furnish suitable goods, and when the seller at the time of contracting knows or has reason to know the buyer's particular purpose and his reliance on the seller's judgment. A merchant seller who makes a sale of goods in which he customarily deals makes an implied warranty of merchantability. The Uniform Commercial Code expressly abolishes the requirement a privies to a limited extent by permitting a suit for breach of warranty to be brought against the seller by members of the buyer's family, his household, and his guests, with respect to personal injury sustained by them. Apart from the express provision made by the Code, there is a conflict of authority as to whether privies of contract is required in other cases, with the trend being toward the abolition of that requirement. At common law the rule was that only the parties to a transaction had my rights relating to it. Accordingly, the buyer could sue his immediate seller for breach of warranties. The rule was stated in the terms that there could be no suit for breach of warranty unless there was a privies of contract. The code expressly abolishes the requirement of privies to a limited extent by permitting a suit for breach of warranty to be bought against the seller by members of the buyer. Apart from the express provision made by the Code, there is a conflict of authority as to whether privies of contract is required in other cases, with the trend being toward the abolition of that requirement.

• 한국IT서비스학회지
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• 제15권4호
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• pp.25-39
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• 2016

The drone is an unmanned aerial vehicle which has no human pilot. Drones can be classified into military drones, commercial drones, and personal drones by usage. Also, drones can be classified from large-sized to nano-sized drone by size and autonomous, remote controlled drone by control type. Especially, military drones can be classified into low-altitude drones, medium-altitude, and high-altitude drones by altitude. Recently, the drone industry is one of the fast growing industries in the world. As drone technologies have become more advanced and cost-effective, Korean government has set its goal to become a top-level country in drone business. However, the government's strict regulation for drone operations is one of the biggest hurdles for the development of the related technologies in Korea and other countries. For example, critical problems for drone delivery can be classified into technical issues and institutional issues. Technical issues include durability, conditional awareness, grasp and release mechanisms, collision avoidance systems, drone operating system. Institutional issues include pilot and operator licensing, privacy rules, noise guidelines, security rules, education for drone police. This study analyzes the trends of the drone industry from the viewpoint of technology and regulation. Also, we define the business areas of drone utilization. Especially, the drone business types or models for public sector are proposed. Drone services or functions promoting public interests need to be aligned with the business reference model of Korean government. To define ten types of drone uses for public sector, we combine the business types of government with the future uses of drones that are proposed by futurists and business analysts. Future uses of drones can be divided into three sectors or services. First, drone services for public or military sectors include early warning systems, emergency services, news reporting, police drones, library drones, healthcare drones, travel drones. Second, drone services for commercial or industrial services include parcel delivery drones, gaming drones, sporting drones, farming and agriculture drones, ranching drones, robotic arm drones. Third, drone services for household sector include smart home drones.

• 한국응용과학기술학회지
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• 제14권3호
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• pp.23-28
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• 1997

N-도데카노닐-N-메틸 아미도 폴리올 카르복시알킬 에테르(DGC)/N-도데카노실-N-알킬글루카민(DG)/물 혼합계에서의 상도를 편광현미경, 시차주사열량계(DSC) 및 레올로지를 이용하여 관찰하였다. 편광현미경으로 계면활성제 농도와 온도의 함수로써 얻어지는 액정상의 형태를 관찰할 수 있었고, DSC측정에 의해서는 비등방성 액정과 등방성 액체 사이의 상전이를 관찰할 수 있었다. 헥사고날과 라멜라 액정상 사이에서 레올로지에 의해 측정된 계면활성제 수용액의 점탄성은 편광현미경과 시차주사열량계에서 얻은 결과와 일치됨을 확인할 수 있었다. DGC/DG(5:5 몰비)/물계의 상에 대하여 조사한 결과, 25${\sim}$65wt% 사이에서는 큐빅 액정상, 70wt% 이상에서는 라멜라 액정상이 나타남을 알 수 있었다.