• International Journal of Highway Engineering
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• v.15 no.2
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• pp.29-37
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• 2013

PURPOSES : This study aims to review the possibility of developing a road snow-melting system that can prevent slip accidents by maintaining a constant temperature of the winter roads and enhance performance of structures, including improvement of compressive strength by mixing carbon nanotube (hereafter referred to as CNT) with cement paste, the basic material. METHODS : To achieve the above purpose, an experiment was conducted by mixing power-type CNT and wrap-type CNT up to cement paste formulation by weight of 0.0wt%~4.1wt% in accordance with "KS L ISO 679(of cement strength test method)", and compressive strength was measured at 28 days of curing. In addition, the volume resistivity of the specimen was measured to test thermal and electrical characteristics, and the rate of temperature changes in specimen surface by power consumption was measured by passing electricity through the cross-sections of the specimen. Meanwhile, the criteria for checking the performance as a road snow-melting system was determined as volume resistivity of $100{\Omega}{\cdot}cm$ or less. RESULTS : A comparative analysis between specimen with 0wt% CNT content in plain status and specimen containing various types of CNTs was carried out. From its results, it was found that compressive strength increased approximately 19%, showing the highest rate when 0.2wt% of wrap-type CNT was contained, but volume resistivity of $100{\Omega}{\cdot}cm$ or less appeared only in specimens containing more than 0.2wt% CNT. In addition, it was observed that the surface temperature increased by $4.62^{\circ}C$ per minute on average in specimens containing 3.2wt% CNT. CONCLUSIONS : In this study, CNT was examined as an underlying material for a road snow-melting system, and the possibility of developing the road now-melting system was reviewed by conducting various experiments using CNT-Cement composites. From the experimental results, the specimens were found to have a superior performance when compared to the existing road snow-melting systems that place the heat transfer medium such as copper on the road. However, satisfactory strength performance were not obtained from the specimen containing CNT(2.0% or more) that functions as a heating element, which leads to the need for reviewing methods to increase the strength by using plasticizer or admixture.

• Journal of Oriental Neuropsychiatry
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• v.31 no.3
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• pp.197-211
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• 2020

Objectives: The purpose of this study was to introduce the progress of treatment and improve clinical use after conducting Mentalizing the Rooms of Mind, the main technique of Mindfulness & Loving Beingness psychotherapy, for a patient with panic disorder. Methods: We conducted a Mentalizing the Rooms of Mind for 10 sessions on an age 23 female diagnosed with panic disorder based on the DSM-5 diagnostic criteria. After receiving consent from the subject, through chart review, the progress of treatment was observed focusing on the MMPI-2 and CSEI-s (The Core Seven Emotions Inventory-short form) conducted pre- and post-treatment. This study was approved by the Institutional Review Board of Wonkwang University Sanbon Hospital (WMCSB202007-55). Results: 1. The MMPI-2 clinical scales of an age 23 female with panic disorder showed a 7 (Pt)-1 (Hs)-3 (Hy) profile pre-treatment, but for post-treatment, the scale showed 1 (Hs)-3 (Hy) profile, and the 7 (Pt) scale showed significant decline. In the MMPI-2 reconstructed clinical scales, RC7 (Dysfunctional Negative Emotions) and RC8 (Aberrant Experiences) showed significant decline. 2. In the pre- and post-treatment MMPI-2 content scales, Anxiety, Fears, Obsessiveness, Social Discomfort, and Work Interference scores decreased, showing overall positive stability. On the MMPI-2 supplementary scales, the Anxiety and Post-Traumatic Stress Disorder scores decreased, and the Ego Strength increased, resulting in improved overall psychological adaptation. 3. Pre- and post-treatment of an age 23 female with panic disorder, CSEI-s showed significant decline of 恐, 驚, 悲, and 思. So it seems that the emotions caused by Chiljeongsang (七情傷) were more stable than before treatment. Conclusions: As shown above, the treatment of panic disorder through Mentalizing the Rooms of Mind, a major technique of Mindfulness & Loving Beingness psychotherapy, showed positive changes in MMPI-2 as well as improvement of the subjective symptoms. Thus, Mentalizing the Rooms of Mind has high clinical use, and it seems that it is necessary to create a manual for this in the future.

• Korean Journal of Community Nutrition
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• v.3 no.5
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• pp.729-738
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• 1998

In order to investigate the types of enteral nutrition formulas currently used in hospitals and evaluate and categorize the commercially prepared enteral nutrition formulas formulas available in the domestic market, we asked dietitians working in 6 hospitals in Seoul to complete the questionnaire and obtained compositional characteristics of 12 commercially prepared enteral nutrition formulas. The average proportion of patients receiving the commercially prepared enteral nutrition formulas(60.6%) was greater than that of patients receiving the in-hospital preparations(31.9%). In the group of patients receiving the in-hospital prepared formulas, the enteral feeding was mainly administered orally, whereas, in the group of patients receiving the commercially prepared formulas, tube feeding was the primary route of formula administration. In both groups, however, a greater proportion of patients received the formulas as total replacements of their meals and for the purpose of dietary supplementation. On the basis of major criteria for evaluation of the commercially prepared enteral nutrition formulas, the 6 products out of the 9 nutritionally complete products formulated for the purpose of dietary supplementation were grouped into the same category(standard protein, caloric density of 1kcal/ml, and tube/oral), so they were considered therapeutically comparable. However, the remaining 3 products were different in protein content(high protein) or route of administration(tube only). Of the 3 nutritionally complete products formulated specifically for the purpose of dietary therapy, 2 products were formulated for patients with renal disease, and the one product was formulated for diabetic patients. Therefore, the data in this study showed that the commercially prepared enteral nutriton formulas became an important part of the enteral nutrition for hospitalized patients in Korea, but the domestic market has not yet generated a wide variety of the formulas, not providing many choices for clinicians to manage the diets for their patients. The results of this study would be helpful for clinicians in choosing appropriate products for their patients, for manufactures in developing new products, and for regulatory authorities to establish the regulation for the broad group of heterogeneous products that are marketed and will be developed as medical foods. In addition, the process of maintaining the categories for evaluation of the commercially prepared enteral nutrition formulas should be dynamic because new products may not reasonably fit any of the existing categories.

• Economic and Environmental Geology
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• v.35 no.4
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• pp.347-353
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• 2002

Dominant rock types of stones used presently for cooking utensils in Korea are pyroxenite, breccia and biotite diorite. Pyroxenite and biotite diorite relatively abundant in mafic minerals have higher specific gravities of 3.0 than breccia of 2.5. Breccia shows the highest absorption (2.9%) among three stones used as cooking utensils and pH value of three stone types shows the alkaline range of 9.7 to 9.9. Among the studied stones used for cooking utensils, biotite diorite is the most durable against abrasion and has the highest strength and therefore, it is expected to be used effectively for the longest time except for other specific causes. Heavy metals such as Cu, Pb, Co, Cr and Ni were leached lower than their detection limit (0.1 ppm) regardless of reaction time and initial pH value of solution. But the leached contents of Fe are various with rock types and leaching conditions and those by acidic solution are generally 1.8 to 31 times higher than those by neutral solution. Breccia and biotite diorite show the highest leached content of Fe in cases of neutral and acidic solutions, respectively. Standard criteria of leached heavy metals and macrominerals should be studied thoroughly to utilize stones for cooking utensils of high quality which are harmless to the human body. Also it is required to examine mon detailed abiochemical properties of various stone types used for cooking utensils.

• Korean Journal of Environmental Agriculture
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• v.22 no.2
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• pp.153-165
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• 2003

This study was conducted to get some information on plants abilities to enhance water purification and to find out away to conserve the ecosystem in Mankyeong river. Vegetation were surveyed at 4 sites pointing by 1:5,000 topographical map, from June 2001 through March 2002. T-N content in water were high in all sites of Mankyeong river, the average T-N levels were 8.59 and 17.23 mg/L, summer and winter, respectively. The average T-P level during summer was 0.47 mg/L but that was 1.79 mg/L during winter. The BOD level in Mankyeong upstream ranged from 0.95 to 2.57 mg/L which would be in I or II grade according to water quality criteria by Ministry of Environment but BOD level in Mankyeong downstream ranged from 6.87 to 9.72 mg/L. The plant species of river flora were found 251, 98 and 85, upstream midstream and down stream, respectively. Among the surveyed plants, Ceratophyllum demersum, submerged plant and Nuphar subinteperrimum took up higher contents of phosphate and nitrogen than other piano. The Phragmites communis and Zizania latifolia having much biomass were thought to be suitable plants for enhancement of e natural water purification.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.14 no.3
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• pp.115-141
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• 2011

In urban space, public space is publicly or privately owned space freely accessible by the public. Privately owned public space to the public hosts small-scale rest facilities to serve the public in buildings of certain purposes and sizes for the sake of pleasant urban environment. The Building Act and building ordinances formulate a set of criteria for management and easement of construction standards as well as the area. When creating privately owned public space, one can get incentives through the easement of floor space index and height limit. The purposes of this study were to investigate and analyze privately owned public open space, which is freely accessible by the public, and its adjacent streets and to propose plans to improve the regulations for securing privately owned public space for more rational and practical legal applications. The study then proposed some plans to help to increase the quality of privately owned public space including applying the coefficient to suggest the type of privately owned public space fit for the features of the streets and measure the appropriate utility level differently and distinguishing the mandatory items according to the facility regulations in privately owned public space from the ones qualified for additional points in case of installation. The types of privately owned public open space should be applied differently and the content of facilities intended should be different according to whether it will serve as a resting place or grant more importance on traffic by walking, depending on the features of its adjacent streets. The privately owned public space, the frontage space of building, and the adjacent sidewalks should become a whole and be regarded as one space from the integrated perspective. The results of the study claim further significance in that it investigated privately owned open space and roadside across Seoul. They will serve as useful data to solve the problems with the privately owned public space of the city, which destroys spatial continuity by focusing on the quantitative increase of privately owned open space and creating individual privately owned open spaces and builds high-rise buildings alienated from the existing spaces, and to increase the quality of future privately owned public space.

• Korean Journal of Environmental Agriculture
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• v.20 no.3
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• pp.169-174
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• 2001

This study was conducted to compare and evaluate the heavy metal contents of agricultural products in Korea and to compare with relevant international criteria such as the Average Daily Intake(ADI) and the Provisional Tolerable Weekly Intake(PTWI) proposed by the joint FAO/WHO Codex Committee on additives and contaminant. Contents of heavy metal in cereals, pulses, potatoes, vegetables and fruits were in the range of $0.010{\sim}0.073$ for Cd, $0.40{\sim}6.45$ for Cu, $0.083{\sim}0.698$ for Pb, $2.45{\sim}16.30$ for Zn, $0.171{\sim}1.378$ for Ni, $0.023{\sim}0.233$ for Cr and $0.026{\sim}0.070$ mg/kg(F.W.) for As. Heavy metal contents of cereals, pulses, potatoes, vegetables and fruits were with natural content levels proposed by FAO/WHO and were similar to value monitored in other countries. Also, average intake of heavy metal from agricultural products was lower than the ADI and PTWI by the joint FAO/WHO Codex Committee on Additives and Contaminants. Therefore, none of the cereals, pulses, potatoes, vegetables and fruits evaluated showed accumulation of such heavy metal high enough to cause health problems to human.

• Child Health Nursing Research
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• v.20 no.2
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• pp.75-86
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• 2014

Purpose: The purpose of this study was to describe the components and content of nursing intervention studies on mother-infant interactions and to present strategies for future studies. Methods: Four electronic databases in the Korean language were searched to identify studies done between January 1998 and December 2011. The search yielded 145 articles. From these articles, 19 studies met the inclusion criteria. Results: Mother-infant interactions in these studies were found to include verbal and non-verbal communication basic for optimal growth and development of the child. Six kinds of interventions for mother-infant interactions were identified as follows: sensory stimulation, education program, whole body massage, kangaroo care, visiting support, and music therapy. Conclusion: Further studies with well designed clinical trials need to be done in the area of child nursing to provide evidence based data for the development of strategies to promote positive mother-infant interactions.

• Journal of Wetlands Research
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• v.22 no.4
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• pp.328-336
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• 2020

In this study, the soil characteristics of peat layer in Korea were analysed to predict new peat distribution areas in Taean, Chungcheongnam-do. The soil characteristics of peat distribution areas in Taean were compared with those in other areas in Korea. In Korea, peat researches were conducted in various regions, such as Taean in Chungcheongnam-do, Pyeongtaek in Gyeonggi Province, Gangneung in Gangwon-do, Ulsan, Iksan in Jeollabuk-do and Jangheung in Jeollanam-do. We summarized a) topographic distribution, b) deposition type, c) soil drainage classes, and d) soil suborder of previously studied area to determine criteria for prediction of peat distribution area. Through a case study, the type of peat layer distribution area in Taean were divided into two; (1) a) valley, b) co-alluvium, c) somewhat poorly drained, d) aqualfs and (2) a) marine plain, b) alluvium, c) very poorly drained, d) aquepts. A field survey was conducted to confirm the distribution of the actual peat layer. All peat layer were located within 10-km from the coastal line which is similar to previous studies, and the peat layer was characterized with pH 5, humic acid content of less than 15% and dark brown color. The new peat layer in Taean was deeper, thicker and less humificated than other studied areas.

• Journal of Korean Society of Forest Science
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• v.85 no.4
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• pp.577-585
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• 1996

To seek effective methods for evaluating air pollution and acid rain injury, artificial acid mist(pH 2.5, 3.5 and 4.5) and ground water(pH 6.5) were treated on the potted seedlings of Ligustrum obtusifolium, Cercis chinensis, Hibiscus syriacus and Sophora japonica. Leaf chlorophyll contents, characteristics of leaf-injury, wettability-measurement of diameter of water-droplets on the leaf surface-among treatments were investigated. The results were summarized as follows. 1. Chlorophyll contents of Ligustrum obtusifolium and Hibiscus syriacus measured on June 3 were highest in pH 2.5 plot, but those of Cercis chinensis and Sophora japonica were relatively low level. Chlorophyll contents of Ligustrum obtusifolium measured on August 24 was highest in pH 2.5 plot, but those of Cercis chinensis, Hibiscus syriacus and Sophora japonica were highest in the control. 2. Changes of chlorophyll contents with acid mist treatments were differed among tree species. 3. For all the tested species, leaf injury(injured leaf number and rate, and injured leaf area) increased with decreasing pH levels of acid mist. 4. Leaf tissue injury seemed to be related with the wettability of the leaf surface. Measurement of diameter of water-droplets on the leaf surface might be useful criteria for acid rain or acid mist injury for the glabrous leaved species, such as, Cercis chinensis, Sophora japonica, etc.