• Title, Summary, Keyword: pools

Search Result 331, Processing Time 0.047 seconds

The Effects of HVAC Management on Condensation Cause and Prevention in Indoor Swimming Pools (실내수영장 공조관리 요인이 시설물 결로원인과 예방에 미치는 영향)

  • Sung, Ha-Dong
    • Journal of the Korea Safety Management and Science
    • /
    • v.20 no.2
    • /
    • pp.9-20
    • /
    • 2018
  • This study is empirically intended to look into the effects of HVAC management on condensation cause and prevention in indoor swimming pools. The findings are summarized as follows. First, the experience of condensation in indoor swimming pools showed that 132 out of 142 people in total experienced the condensation in indoor swimming pools, which they had a high experience rate of 92.3%. For the location of condensation, the wall joints were 46.8% and the windows were 34.5%, which a total of 72.3% occurred in the wall joints and windows. Second, the effect of construction design, HVAC management and building construction on the cause of condensation in indoor swimming pools showed that building construction had an effect on the cause and location of condensation depending on the seasonal time, partially adopting hypothesis 1. Third, the effect of condensation-causing factors on condensation-preventing factors in indoor swimming pools showed that condensation had a close relationship with air and temperature conditions depending on the time and location of condensation, adopting hypothesis 2. As for the above-stated findings, the HVAC management in indoor swimming pools is an important concern factor that continues to cause condensation despite the development of advanced construction materials. Especially, building construction is a main factor that has a direct effect on condensation in the HVAC management of facilities. This implies that the window management is important in maintaining the wall joints - which can suppress the selective use and defect occurrence of construction materials - or confined spaces for a long time.

Effect of the Application of Carbonized Biomass from Crop Residues on Soil Chemical Properties and Carbon Pools

  • Lee, Sun-Il;Park, Woo-Kyun;Kim, Gun-Yeob;Choi, Yong-Su
    • Korean Journal of Soil Science and Fertilizer
    • /
    • v.48 no.5
    • /
    • pp.549-555
    • /
    • 2015
  • Objective of this study was to investigate the effect of carbonized biomass from crop residues on chemical properties of soil and soil carbon pools during soybean cultivation. The carbonized biomass was made by field scale mobile pyrolyzer. A pot experiment with soybean in sandy loam soil was conducted for 133 days in a greenhouse, by a completely randomized design with three replications. The treatments consisted of four levels including the control without input and three levels of carbonized biomass inputs of $9.75Mg\;ha^{-1}$, C-1 ; $19.5Mg\;ha^{-1}$, C-2 ; $39Mg\;ha^{-1}$, C-3. Soil samples were collected and analyzed pH, EC, TC, TN, inorganic-N, available phosphorus and exchangeable cations of the soils. Soil pH, Total-N and available phosphorus contents correspondingly increased with increasing the carbonized material input. The contents of soil carbon pools were $19.04Mg\;C\;ha^{-1}$ for C-1, $26.19Mg\;C\;ha^{-1}$ for C-2, $33.62Mg\;C\;ha^{-1}$ for C-3 and $12.01Mg\;C\;ha^{-1}$ for the control at the end of experiment, respectively. Increased contents of soil carbon pools relative to the control were estimated at $7.03Mg\;C\;ha^{-1}$ for C-1, $14.18Mg\;C\;ha^{-1}$ for C-2 and $21.62Mg\;C\;ha^{-1}$ for C-3 at the end of experiment, respectively, indicating that the soil carbon pools were increased with increasing the input rate of the carbonized biomass. Consequently, it seems that the carbonized biomass derived from the agricultural byproducts such as crop residues could increase the soil carbon pools and that the experimental results will be applied to the future study of soil carbon sequestration.

Interrelation with food and habitat preference of Littorina in upper intertidal tide pools

  • Park, Han-Gil;Kim, Young-Sik;Nam, Ki-Wan
    • Proceedings of the Korean Society of Fisheries Technology Conference
    • /
    • /
    • pp.491-492
    • /
    • 2001
  • Seaweeds often provide both habitat and food for several groups of animals (Brawley, 1992). Tide pools constitute a remarkable feature that community structures of seaweeds and animals are different from those of intertidal zone. Neorhodomela auculeata(Perestenko) Masuda and Ceramium kondoi Yendo grow in tide pools where Littorina sp. is abundant (Lee et al., 2000). (omitted)

  • PDF

WATER CHLOROFORM LEVELS IN INDOOR SWIMMING POOLS IN A CITY OF KOREA AND IN A CITY OF NEW JERSEY IN THE UNITED STATES (국내 및 미국 뉴저지주의 수영장 물에서의 클로로포름)

  • 조완근
    • Journal of Environmental Science International
    • /
    • v.3 no.2
    • /
    • pp.101-109
    • /
    • 1994
  • Chlorinated water in swimming pools contains chloroform at elevated levels compared to chlorinated drinking water Chloroform levels in four indoor swimming pools(swimming pools A, B and C in a city of Korea and swimming pool D in a city of New Jersey in the United States) were examined. The chloroform levels in the water of swimming pool C (city-managed) weve shown to be significantly(p=0.0001) different from those of private swimming pools A and B: the mean chloroform levels in the pools A, B, and C are 22.8, 17.8, and 31.1 $\mu\textrm{g}$/l, respectively. Furthermore, all of these chloroform levels are significantly(P=0.0001) different from those of New Jersey: chloroform concentration of the Korean pools ranged from 10.9 $\mu\textrm{g}$.l to 47.9 $\mu\textrm{g}$/l with a mean of 23.2 $\mu\textrm{g}$/l, while it ranged from 27 $\mu\textrm{g}$/l to 96$\mu\textrm{g}$/l with a mean of 64.4 $\mu\textrm{g}$/l in the New Jersey pool. The disinfection processes would cause part of this difference since the swimming pools in Korea applied both chlorination and ozonation method, while the swimming pool in New Jersey used chlorination method only. It was implied that swimming parameters inconsistently vary, resulting in fluctuation of and no constant accumulation of chloroform in the water with the change of time for the day. A regression analysis showed no relationships between sampling time and chloroform concentrations for the sampling day in the swimming pools of Korea. A F-test indicated no significant difference of chloroform concentrations in the morning and afternoon samples collected in the swimming pools. Ingestion dose was estimated to be 0.58$\mu\textrm{g}$ from an hour swimming in a city of Korea, taking into accounting an average of 23.2 $\mu\textrm{g}$/l in swimming pools in the city In extreme situation, the ingestion dose was estimated to be 12.0 $\mu\textrm{g}$ from an hour swimming in a city of Korea.

  • PDF

Analysis of Social Network Service Data to Estimate Tourist Interests in Green Tour Activities

  • Rah, HyungChul;Park, Sungho;Kim, Miok;Cho, Youngbeen;Yoo, Kwan-Hee
    • International Journal of Contents
    • /
    • v.14 no.3
    • /
    • pp.27-31
    • /
    • 2018
  • Social network service (SNS) data related to green tourism were used to estimate preferred tour sites and users' interests. Keywords related with green tour activities were employed to search the SNS data. SNS data were collected from Korean blogs such as Naver and Daum from June $1^{st}$ to August $31^{st}$ between 2015 and 2017 using text-mining solution. During the study period, seven hundred and five posts were analyzed. Associated words that frequently co-occurred with keywords were classified into different categories depending on the nature of associated words. Associated words included swimming pools and camping sites (location); experience and swimming pools (attribute); and water play and culture (culture/leisure). Our data suggest that SNS users with experience of green tourism in Korea exhibited interest in green tourism with swimming pools, camping sites, experience, water play and/or culture rather than particular popular sites. Based on the findings, it is recommended that preferred facilities such as swimming pools should be provided at green tourism sites to meet the users' needs and to facilitate green tourism.

Self-reported Skin and Eye Symptoms among Swimming Pool Users in Daegu, Korea (대구지역 수영장 이용자의 피부와 눈 관련증상 경험률)

  • Ryu, Seung-Min;Park, So-Hee;Park, Jae-Woo;Shin, Deuk-Yong;Jeon, Man-Joong;SaKong, Joon
    • Journal of Environmental Health Sciences
    • /
    • v.38 no.4
    • /
    • pp.340-350
    • /
    • 2012
  • Objectives: This study was conducted to investigate skin and eye symptoms according to swimming pool user characteristics and chlorine concentration at indoor swimming pools in the Daegu region. Methods: A total of 296 swimming pool users were enrolled from the eight swimming pools randomly chosen in Daegu. Each user completed a self-administered questionnaire with general, swimming related, and symptoms suffered throughout December 2008 to August 2009. The water analysis of swimming pools was substituted with the swimming pool water analysis practiced by district offices to 2008. Results: There were significant differences in experience rate of self-reported skin and eye symptoms between coaches and students except dander. The users of swimming pools having higher chlorine concentrations suffered from more frequent skin and eye symptoms. The results of multiple logistic regression analysis for experience of skin symptoms showed that coaches (OR = 6.81, 95% CI: 2.46~18.81) and pools with chlorine concentrations over 0.4 mg/l (OR = 1.75, 95% CI: 1.01~3.03) were the significant variables. For experience of eye symptoms, coaches (OR = 4.13, 95% CI: 1.25~13.69) at a swimming pool was the significant variable. Conclusions: Increased exposure to swimming pool water and exposure to swimming pool showed that higher chlorine concentration may cause more frequent skin and eye symptoms.

Species Composition and Vertical Distribution Pattern of Fish in Rock Tidal Pools at Mohang, Taeanhaean National Park (태안해안국립공원 모항 암반조간대 웅덩이의 어류 종조성과 수직분포)

  • Choi, Youn;Lee, Heung-Heon
    • Korean Journal of Ichthyology
    • /
    • v.25 no.4
    • /
    • pp.227-233
    • /
    • 2013
  • Speceis composition and distribution by altitude of fish in the rock tide pools in Taean were determined using montly samples collected in the 9 tide pools from January to December 2010. Among 16 species collected, a forktongue goby Chaenogobius annularis was dominant accounting for 34.6% in the total number of individuals, and followed by Dictysoma burgeri (22.0%), Sebastes schlegelii (6.9%) and Tridentiger trigonocephalus (6.8%). A resident fish Dictyosoma burger occurred at all tide pools, and Chasmichthys dolichognathus was dominant in the upper tide pools and was collected throughout the study period. The resident fish is more abundant than the transient fish and occasional fish accounted for 61.4%, 14.2% and 24.4% in biomass, respectively.

A Study on the Energy Conservation Effect of Each Energy Consumption Component In Indoor Swimming Pools (실내수영장의 에너지 소비요소별 에너지 절약효과에 관한 연구)

  • 김영돈;권규동;여명석;김광우
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
    • /
    • v.14 no.12
    • /
    • pp.1092-1101
    • /
    • 2002
  • The objective of this study is to develop energy saving strategies for indoor swimming pools and to estimate the effect of each energy saving strategy. For this purpose, field measurements regarding pool water heating energy, domestic hot water heating energy are conducted and a base energy consumption model is implemented using the DOE-2.1E program. The results of the study reveal that 25% of the total pool water heating energy may be saved by using night time pool covers, 27% of the total domestic hot water heating energy may be saved by using a waste water heat recovery system (effic. 60%), and of the total ventilation energy may be saved using an exhaust air heat recovery system (effic. 60%).

Immunocytochemical Study on the Translocation Mechanism of Glucose Transporters by Insulin

  • Hah, Jong-Sik;Kim, Ku-Ja
    • The Korean journal of physiology & pharmacology
    • /
    • v.27 no.2
    • /
    • pp.123-138
    • /
    • 1993
  • The mechanism of insulin action to increase glucose transport is attributed to glucose transporter translocation from intracellular storage pools to the plasma membrane in insulin-sensitive cells. The present study was designed to visualize the redistribution of the glucose transporter by means of an immunogold labelling method. Our data clearly show that glucose transporter molecules were visible by this method. According to the method this distribution of glucose transporters between cell surface and intracellular pool was different in adipocytes. The glucose transporter molecules were randomly distributed at the cell surface whereas the molecules at LDM were farmed as clusters. By insulin treatment the number of homogeneous random particles increased at the cell surface whereas the cluster forms decreased at the intracellular storage pools. It suggests that the active molecules needed to be evenly distributed far effective function and that the inactive molecules in storage pools gathered and termed clusters until being transferred to the plasma membrane.

  • PDF

Sequence-Based Screening for Putative Polyketide Synthase Gene-Harboring Clones from a Soil Metagenome Library

  • JI SANG CHUN;KIM DOCKYU;YOON JUNG-HOON;OH TAE-KWANG;LEE CHOONG-HWAN
    • Journal of Microbiology and Biotechnology
    • /
    • v.16 no.1
    • /
    • pp.153-157
    • /
    • 2006
  • A soil metagenomic library was constructed using an E. coli-fosmid cloning system with environmental DNAs extracted from Kwangreung forest topsoil. We targeted the genes involved in the biosynthesis of bacterial polyketides. Initially, a total of 36 clone pools (10,800 clones) were explored by the PCR-based method using the metagenomic DNAs from each pool and a degenerate primer set, which has been designed based on the highly conserved regions among ketoacyl synthase (KS) domains in actinomycete type I polyketide synthases (PKS Is). Six clone pools were tentatively selected as positive and further examined through a hybridization-based method for selecting a fosmid clone containing PKS I genes. Colony hybridization was performed against fosmid clones from the 6 positive pools, and finally 4 clones were picked out and confirmed to contain the conserved DNA fragment of KS domains. In this study, we present a simple and feasible sorting method for a desired clone from metagenomic libraries.