• 한국노년학
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• 제29권4호
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• pp.1665-1683
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• 2009

The purpose of this study is to examine what the formation of a community incorporating two generations of people can give the elderly and the problems which are associated with establishing related programs of this kind. For this, the researcher enacted ethnographic method like as observant participation and in-depth interview on 24 participants. From this study, I found that the elderly and the children who took part in several programs to form the intergenerational linkages made the system meaningful in the following ways: first, the more harmonious the communication across between two age groups is, the more the understanding between them increases. Second, the sense of community has intensified the natural harmony. Third, the more self-satisfaction and confidence increases, the more self-efficacy is enhanced. Fourth, the purposeful and creative activities with peers have enabled the elderly to enjoy their leisure time. Fifth, the elderly have experienced the pleasure of learning and sharing common sense as a life-long learners. However, in the process of this program, several problems occurred such as the rigidly bureaucratic operation of the program and the elderly people's individual differences. In addition, the lack of a precisely-existing program necessary to form the intergenerational linkages and to bring together different generations was a problem. Finally, I have concluded that the effort to form the intergenerational linkages helps increase the understanding and cooperation across age groups and contributes to the successful aging of the elderly.

• The Journal of the Acoustical Society of Korea
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• 제30권4호
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• pp.207-214
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• 2011

Human auditory acuity decreases naturally due to aging. But recently cases of impaired hearing at a young age are increasing greatly. The biggest reason for such an increase of population with impaired hearing is popularization of various kinds of portable multimedia appliances. Many studies on impaired hearing due to noises caused by the earphone and headphone are being made, but there are few studies on noise-impaired hearing caused directly by mobile phone communication. Based on a precedent inquiry, this study proposes a technique for preventing noise-impaired hearing applying to an active noise reduction technique onto bone conduction speaker. This technique is a method for reducing noises by antiphase oscillation through bone conduction speaker with ambient noises. If the proposed system is applied, the noise level that is actually introduced to audition decreases by more than 12 dB, and such a decreased amount of sound volume fundamentally prevents the factors of noise-caused hearing difficulty due to mobile phone communication. Sensibility test results showed that adequate communication was possible even in such a situation where communication volume was decreased like this.

• Proceedings of the Korean Society of Developmental Biology Conference
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• 한국발생생물학회 2003년도 제3회 국제심포지움 및 학술대회
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• pp.112-112
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• 2003

Telomere란 진핵세포에 존재하는 DNA-protein 복합체로서 염색체의 말단부에 tandem repeated DNA 서열 (TTAGGG)과 특정 단백질로 구성되어 있으며 세포 분열이 진행함에 따라 이의 길이가 짧아지게 되고 일정 길이 이하가 되면 세포의 사망이 유발된다. 반면 telomerase는 ribonucleoprotein으로서 telomeric DNA의 합성에 관여하는 것으로 염색체의 말단에 telomeric DNA의 소실을 보충하는 역할로 알려져 있다. 최근 암, 노화 등과 관련하여 telomere 및 telomerase의 연구들이 활발히 진행되고 있으며, 다양한 세포들에 있어 이들의 존재와 역할에 대해서도 많은 연구들이 수행되고 있다. 포유동물의 초기 배자에 있어 telomere의 분포 양상과 telomerase의 activity의 분석은 배 발생의 기작과 배자의 세포적 특성을 구명하는데 매우 중요한 과제라 사료된다. 따라서 본 연구에서는 마우스의 초기 배 발생 단계별 수정란의 telomeric DNA의 분포 양상과 각 단계별 배자들의 telomerase activity를 제시하고자 하였다. 시험에 공시된 마우스는 4-6주령된 ICR계통으로 이들을 과배란 처리 후 자연 교배시켜 얻은 2-, 4-, 8-세포기배, 상실배 및 배반포배를 대상으로 하였다. Telomeric DNA의 양적 분석은 각 발생단계별 수정란의 표본을 제작하고 human telomere repeat probe를 이용하여 FISH (fluorescence in situ hybridization)를 시행하였으며, 분리된 할구들을 형광현미경으로 관찰 후 상을 포착하고 image analyser program (MataMorph, UIC, USA)을 이용하여 한 개의 세포내 telomere의 상대적 함량을 분석하였다. 발생 단계별 배자의 telomerase activity의 분석은 TRAP (telomeric repeat amplofication protocol) assay로 분석한 바 각 발생 단계별 30개의 수정란으로부터 핵 단백질을 추출하여 telomerase를 신장시키고 PCR을 시행한 후 15% PAGE gel loading하여 이의 activity를 확인하였다. 분석 결과, telomeric DNA의 함유율은 발생단계별 다소의 차이를 나타내었으며 telomerase activity는 모든 발생단계의 수정란에서 확인할 수 있었고, 특히 상실배부터 높게 나타남을 확인하였다.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 한국조명전기설비학회 2004년도 학술대회 논문집
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• pp.203-208
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• 2004

We are living now under the bad air pollition contained the many plus(+)ion produed by the exhaust gases from automobil and Industrial plant. To be refreshe those air pollution. We developed the funtional lighting fixture which emit the lighting, negative(-)ion and Infraredray. The negative(-)ion and Infraredray refresh the air pollition and will arise nature healing power lot the human body and activate the body cell, and makes the good blood circulation and then we had the experiment to the Biological effect by the funtional lighting fixture.

• Korean Journal of Food Science and Technology
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• 제49권3호
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• pp.229-234
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• 2017

For elderly individuals with swallowing difficulties, texture-modified food containing thickeners is needed. The plant materials freeze-dried yam, lotus root, and artichoke were evaluated for their potential use as thickeners and compared to a commercial thickener (corresponding to 0.5, 1, or 2 bag viscosity, respectively). Yam powder showed a high peak viscosity, corresponding to that of rice starch. Although artichoke showed no pasting viscosity, it may be useful as a thickener when combined with xanthan gum. The certain amount of yam, lotus root, and artichoke powders added to commercial soup showed similar viscosities as the addition of 0.5 or 1 bag commercial thickener at $60^{\circ}C$. However, sufficient viscosity corresponding to that of 2 bags of commercial thickener was not achieved by using the plant material itself. Sensory tests by elderly subjects revealed that the soup with yam powder was preferred compared to soup made with other materials.

• Journal of the Society of Cosmetic Scientists of Korea
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• 제36권3호
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• pp.221-226
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• 2010

A rare isoflavone, 7, 8, 4'-trihydroxyisoflavone, was isolated from a 10-year-old fermented soybean food. 7, 8, 4'-trihydroxyisoflavone was isolated for the first time from a Korean fermented soybean food. Evaluation tests of biological activity showed significantly inhibition activity for free radical scavenging on both non-enzymatic (DPPH system) and enzymatic method (xanthine oxidase system). DPPH radical scavenging effect of 7, 8, 4'-trihydroxyisoflavone was similar with vitamin C in a dose-dependent manner. In xanthine oxidase (XO) system 7, 8, 4'-trihydroxyisoflavone showed superoxide radical inhibition activity of 50 % at a concentration of $6.6{\pm}0.4\;{\mu}M$. Also, the compound significantly suppressed cellular MMP-1 formation. These results suggest that 7, 8, 4'-trihydroxyisoflavone could be developed as a potential preventive or therapeutic agent against skin aging.

• Journal of Industrial Convergence
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• 제18권1호
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• pp.97-107
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• 2020

Since long ago, there has been a saying that "Drink water to quench thirst, drink alcohol to remove anguish and anxiety, and drink tea to recover from fatigue and refresh mind." Tea is really better for body and mind than water when it is drunken long and is valuable Jinda(眞茶) given by mother nature. In particular, curing tea reflecting characteristics of climate changes in all seasons helps in keeping health. Since tea contains the Yin-Yang system, which is a philosophical ideology of ancient people, old predecessors knew which tea they should brew and drink for curing in harmony with Yin and Yang. As a factor that influences component changes of tea, a complex interaction of heaven, earth and man is important and especially, mind of a person to handle tea is most important. Tea is a natural curing drink, which plays a role as a bridge between humans and nature.

• Journal of the Korea Institute of Information and Communication Engineering
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• 제22권11호
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• pp.1428-1434
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• 2018

Canine cataract is developed with aging and can cause the blindness or surgical treatment if not treated timely. In this paper, we propose a method for extracting cataract suspicious areas automatically with FCM(Fuzzy C_Means) algorithm to overcome the weakness of previously attempted ART2 based method. The proposed method applies the fuzzy stretching technique and the Max-Min based average binarization technique to the dog eye images photographed by simple devices such as mobile phones. After applying the FCM algorithm in quantization, we apply the brightness average binarization method in the quantized region. The two binarization images - Max-Min basis and brightness average binarization - are ANDed, and small noises are removed to extract the final cataract suspicious areas. In the experiment with 45 dog eye images with canine cataract, the proposed method shows better performance in correct extraction rate than the ART2 based method.

• The Journal of Korean Academy of Prosthodontics
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• 제57권3호
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• pp.280-287
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• 2019

In the oral cavity, the teeth undergo wear and corrosion throughout their lives. Progressive and constant tooth wear is a natural phenomenon of aging, but wear and corrosion due to specific factors are pathological factors. It can cause pathological damage of the occlusal surface, aesthetic problems, dimensional loss and jaw joint disorders. This case is a 26-year-old female patient with general tooth abrasion and erosion on the entire dentition. Diagnostic wax-up was fabricated based on the information including digital facial analysis, physiological stabilization, and evaluation of anterior crown length. Through the digital analysis, the necessary guides for crown lengthening were prepared and the mastication function and esthetics were evaluated by using temporary crowns. Definitive prosthesis was fabricated with the zirconia restorations. The results were satisfactory when they were observed 3 months of follow-up.

• Journal of Plant Biotechnology
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• 제48권4호
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• pp.223-227
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• 2021

Several hypotheses for the origin of cultivated sweetpotato [Ipomoea batatas L. (Lam)] have been suggested but the exact progenitor is still unknown. Based on the results of RFLP patterns, microsatellite markers, SNP markers, FISH analyses, and genome analyses of haplotypes, wild species belonging to batatas group, I. trifida, I. leucantha, I. littoralis, I. tabascana, I. tenuissima, I. tiliacea, and I. triloba have been suggested as a progenitor. However, recently, advanced genomic technologies and characterization of the inserted T-DNA fragments of Agrobacterium in the genome of cultivated sweetpotato and wild species through horizontal gene transfer suggest that there may be an older progenitor than the wild species suggested so far.