• Journal of Environmental Science International
• /
• v.30 no.11
• /
• pp.937-944
• /
• 2021

In this study, water resource topics, infrastructure, water supply, users, and economic indicators based on statistical annual standards for evaluating water welfare were selected by examining domestic and foreign water resource-related indicators. The level of water welfare was evaluated relative to 23 cities and counties in Daegu and Gyeongsangbuk-do using data from the Statistical yearbook, and places with high value of indicators urbanization and large populations were excellent in the infrastructure field, but overall analysis showed that small and medium-sized cities had higher levels. It is judged that it is necessary to develop continuous research and indicators that can evaluate and quantify the level of physical welfare that the people can feel by utilizing the results of this study. In future studies, it is necessary to systematically evaluate the level of water welfare by local governments in Korea through more diverse evaluation items and detailed indicators for each item so that it can be used as basic data for realizing water welfare.

• Journal of Environmental Impact Assessment
• /
• v.31 no.3
• /
• pp.184-199
• /
• 2022

Freshwater soundness can be broadly divided into the health of river ecosystems and social services for human water use, that is, water welfare. In this study the ecological soundness and water welfare index of rivers were calculated, and the freshwater comprehensive soundness was analyzed using the quadrant model for 14 basins in the Geum River basin. As for the ecological soundness of the river, the area upstream of the dam (based on Daecheong Dam) was evaluated as 'good', and the area downstream of the dam was evaluated as 'bad'. On the other hand as for water welfare, the area downstream of the dam with a large population was in a relatively 'good' condition, and the area upstream of the dam had a relatively 'poor' level of water welfare. In terms of freshwater comprehensive soundness, it was found that the basins of Mujunamdaecheon, Bocheongcheon and Daecheongdam showed good ecological soundness and water welfare, and the Geumganggongju, Nonsancheon and Geumganhagueon basins were all poor. The Gapcheon basin showed good results in 2014 due to continuous investment and systematic management. Therefore, it is necessary to find ways to utilize it for other watersheds through benchmarking.

• Proceedings of the Korean Powder Metallurgy Institute Conference
• /
• 2006.09b
• /
• pp.1116-1117
• /
• 2006

Lanthanide tantalite $LnTaO_4$ (Ln= La, Nd, Sm, Dy, Er and Tm) was synthesized by a solid state reaction between mixed powders of $Ln_2O_3$ and $Ta_2O_5$. The single-phase $LnTaO_4$ was prepared by sintering at temperatures of 1423-1673 K in air. The SEM observation showed that the particles were provided with the growth steps and the depeloped facets. The photocatalytic activity for water splitting of $LnTaO_4$ prepared was measured under UV light irradiation. The activity obtained was higher than that previously reported. These results suggested the crystallinity of $LnTaO_4$ photocatalysts correlates closely with the efficiency of water splitting.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2010.05a
• /
• pp.132-139
• /
• 2010

The river technology of Japan was highly developed and achieved much result in flood protection, water use and the environment. Nowadays, the function which is requested to the river is changes because the society changes from growth to maturity. In this study, we suggest the functions of the river in the maturity society about future welfare, medical care and education based on field research of case study. In this research, we pay attention to the functions related with culture, one) function of healing, mental stress improvement and life, two) function of landscape, education and recreation. And this paper proposed the usage of the river where adopt to the times, a function and the value of "the river as the space". We made a questionnaire to 187 river managers, and 90% of answers wear positive for use the river as the medical aspect, health and the welfare. Furthermore, based on research result of hospitals and welfare facilities which used a river for their activities, we suggest to develop and use the river walk, to design a city and rivers as one, and to use many facilities which are located on river front more active, those are improve the new river functions.

• Proceedings of the KSRS Conference
• /
• v.1
• /
• pp.25-28
• /
• 2006

We propose a new method of masking cloud-affected pixels in satellite ocean color imageries such as of GLI. Those pixels, mostly found around cloud pixels or in scattered cloud area, have anomalous features in either in chlorophyll-a estimate or in water reflectance. This artifact is most likely caused by residual error of inter-band registration correction. Our method is to check the pixel-wise 'soundness' of the spectral water reflectance Rw retrieved after the atmospheric correction. First, we define two spectral ratio between water reflectance, IRR1 and IRR2, each defined as RW(B1)/RW (B3) RW (B3) and as RW (B2)/RW(B4) respectively, where $B1{\sim}B4$ stand for 4 consecutive visible bands. We show that an almost linear relation holds over log-scaled IRR1 and IRR2 for shipmeasured RW data of SeaBAM in situ data set and for GLI cloud-free Level 2 sub-scenes. The method we propose is to utilize this nature, identifying those pixels that show significant discrepancy from that relationship. We apply this method to ADEOS-II/GLI ocean color data to evaluate the performance over Level-2 data, which includes different water types such as case 1, turbid case 2 and coccolithophore bloom waters.

• Journal of Physiology & Pathology in Korean Medicine
• /
• v.29 no.5
• /
• pp.403-408
• /
• 2015

Traditionally, 5 kinds of fruits with "ja(子)" in their name, including Rubus coreanus, Schisandra chinensis, Lycinum chineuse, Torilidis fructus, and Cuscuta seed, collectively called Oja(五子), are long known to enhance stamina. In the present study, we replaced tosaja with gyeolmyeongja(Cassiae semen ) and examined the effects of extracts from these fruits on andropause. This study investigated the antioxidant effect and testosterone synthesis of Oja water extract on Leydig TM3 cells. To investigate whether hydrogen peroxide induces oxidative stress in Leydig cells, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide(MTT) assay, nitric oxide assay, and testosterone assay were performed on mouse Leydig TM3 cells. The results were obtained as follows: Leydig TM3 cells viability was assessed by a modified MTT assay, and the protection effect of Oja water extract against hydrogen peroxide-induced cell oxidative stress were examined by mitochondrial activity. Oja water extract could efficiently protect cytotoxicity induced by H₂O₂. Oja water extract promoted testosterone synthesis. These results suggest that Oja water extract has protective roles and promotes steroidogenesis in Leydig cells through its anti-oxidant action.

• Journal of Environmental Policy
• /
• v.9 no.2
• /
• pp.135-155
• /
• 2010

The purposes of the paper are to estimate welfare change from water quality degradation by using contingent valuation method in Namdae stream of Gangrung and identify what factors of Namdae stream are important to Gangrun citizens. The study results show their total WTP per year and per household, \117,040 to improve Namdae stream quality from grade 3 to grade 1, including monetary WTP \87,502 plus opportunity cost of volunteering time for protection campaign, \29,538. The amount of total welfare change from water quality degradation based on the total WTP estimated above is calculated to be \27 billion of which the amount, as a sort of damage cost from water quality degraded, is so huge. All projects and policies related to natural environments, therefore, should consider both indirect and direct effects from them because natural environments have the irreversibility once degraded or deteriorated and would ultimately be influential on humans, both current and future generations, with tremendous amounts of time and costs beyond our imagination.

• Journal of the Korean housing association
• /
• v.19 no.5
• /
• pp.77-84
• /
• 2008

The purpose of this study is to develop the housing welfare indicators for evaluating housing welfare policies conducted by the Korean government. The contents of this research were as follows: as a phrase of setting up the development of housing welfare indicators, the scope of housing welfare and the direction of developing housing welfare indicators were settled. Second, as a phrase of drawing the housing welfare indicators, the indicators were categorized and selected. Third, as a phrase of applying the housing welfare indicators, the indicators in this research were quantified, and suggest the housing welfare from 2000 to 2005. As a result of this research, selected housing welfare indicators were settled as follows: the housing welfare indicators comprise 9 in the department of 'House', 4 in the department of 'Community', and 6 in the department of 'Policy Environment' (19 in total). Indicators were (1) Ratio of housing with Flush Toilets (2) Ratio of housing with Kitchen Sink (3) Ratio of housing with Bath facilities (4) Ratio of housing provided water supply (5) Ratio of housing supplied a sewage system (6) Floor Space per person (7) Number of persons per Room (8) PIR (9) RIR (10) Community Facilities Space per person (11) Urban Park Space per person (12) Journey to work (13) Crime Ratio (14) Number of Houses per 1,000 persons (15) Ratio of Substandard housing of the Minimum Housing Standard (16) Ratio of Irregular Dwelling Households (17) Ratio of Owner Occupant (18) Ratio of compulsory immigration (19) Ratio of Long-term Public Social Houses. The housing welfare indicators developed in this research will be used for the comprehensive assessment of the results of housing welfare policies and the establishment of housing policies as a basic material in the future.

• Journal of The Korea Institute of Healthcare Architecture
• /
• v.10 no.2
• /
• pp.117-124
• /
• 2004

In this study, some methods for the organization of space in the welfare center for the disabled are suggested corresponding to the change of welfare paradigm for the disabled, by means of investigating and analyzing the existing organization of space, division of the areas and relevant programs. The results of the study are as follows. 1) The method of the spatial organization in the welfare center for the disabled is divided largely into an area of the welfare complex center used as a facility of uses and an area of the controlling center that manages and makes use of domiciliary welfare. 2) The division of counselling and management is the center for the aforementioned two areas. This division occupying the minimum space in the welfare center has to be expanded. Besides, the space for the volunteers for 'domiciliary welfare' is necessary. This can be administered synthetically along with the room for volunteers in the division of social rehabilitation. 3) It is necessary for the division of medical rehabilitation to have a common waiting area due to its close connection with other treatment rooms. It should be recommended to have it in the water treatment room. It is required to have a parents' waiting area in the treatment room for child rehabilitation. 4) In case of the division of educational rehabilitation, the daytime care center should be closely related to the division of medical rehabilitation. Meanwhile, the classrooms after school have a limited use so that they can be shared with the room for female rehabilitation in the division of social rehabilitation. 5) It is in reality for the division of social rehabilitation to have an expanded area of domiciliary welfare. The room for volunteers for domiciliary welfare should be arranged, too.

• Journal of Korean Society of Water and Wastewater
• /
• v.32 no.6
• /
• pp.551-557
• /
• 2018

Since its foundation in September 1986, the Korean Society of Water and Wastewater has made a significant contribution to the water sector in Korea over the past 30 years. The 30th anniversary commemorative committee reviewed the establishment goal of the society and its development strategy for organization and present the "Future Vision of Korean Society of Water and Wastewater" for the next 30 years. The future vision of the society is defined as "Aiming for the healthy life and preservation of the environment through the development of water and wastewater technology and experience". Promotion strategies for implementing the future vision are as follows: 1. Leading water and wastewater technology, 2. Develop water and wastewater policy, 3. Strengthen water and wastewater capacity, 4. Reinforce institutional governance. The driving target to be achieved through the implementation strategy is "To lead the global standards of water and wastewater." We also presented national issue, policy issue, and technical issues in the water sector. Climate change, unified Korea, water safety, and national welfare were selected as national issues related to water and wastewater. This approach was taken from the perspective of policy consumers such as citizens, civil society, experts, and local government/industry. By presenting policy issues and technical issues that address national issues, authors have proposed a future policy direction for the Korean Water and Wastewater Society to make critical contributions to national development.