• Proceedings of the Korea Water Resources Association Conference
• /
• 2006.05a
• /
• pp.1410-1414
• /
• 2006

Infiltration and Inflow(I/I) through the old or broken sewer are caused falling efficiency of sewage treatment plants. Recently, to solve these problems maintenance work of sewer pipes is progressing and sewer flow is metered for I/I survey. In this paper, metered sewer data at GyeongGi-Do H city for two years are analyzed by ToSS program. And this paper suggest particle use of sewer flow much data for many years.

• Korean Journal of Adult Nursing
• /
• v.24 no.2
• /
• pp.160-170
• /
• 2012

Purpose: The aim of this study was to assess knowledge, attitude, correct metered dose inhaler (MDI) use and compliance with self management among patients with chronic obstructive pulmonary disease (COPD). Methods: The participants of this study consisted of 109 COPD patients who were outpatients in C and K hospital located in G city from March 1 to September 30th, 2010. Data were measured using self-administered questionnaires and observational checklist. The data were analyzed using SPSS/WIN 18.0 program that included mean, standard deviation, ANOVA, Sheffe test, and Pearson's correlation. Results: There were significant relationships between knowledge and attitude (r=.33, $p$ <.001), between knowledge and correct MDI use (r=.37, $p$ <.001), and between knowledge and self-management compliance (r=.28, $p$=.003). There was significant relationship between attitude and self-management compliance (r=.33. $p$ <.001). In contrast, attitude was not significantly related to correct MDI use. Conclusion: The study showed that COPD knowledge and attitude of patients were related compliance in managing their disease. Therefore, strategies need to be utilized in education programs which would improve knowledge and subsequently improve attitude and compliance.

• Journal of Korean Society of Water and Wastewater
• /
• v.33 no.4
• /
• pp.299-309
• /
• 2019

Waterworks facilities inevitably experience some amount of leakage even if there is a lot of investment or state-of-the-art technology that is applied such as DMA(District Metered Area) system construction, leakage detection, repair, pipe rehabilitation, etc. The primary reason is the leakage is naturally restored over time. In the UK, this restoration characteristic is defined as NRR(Natural rate of rise of leakage) and used to decision making for prioritizing active leakage control of DMAs. However, this restoration characteristic is well recognized, but researches on NRR in the water distribution system are insufficient in Korea. In this study, the estimation method of NRR was developed suitable for applicating in Korea considering of SCADA data, water infrastructure, and water usage patterns by modification of the UK's NRR method. The proposed method was applied to 9 DMAs and verified it's applicability by comparing with the other water loss performance indicators. It is expected that the proposed method can be used to support decision making for sustainable NRW(Nor-revenue water) management in the water distribution system.

• KIEAE Journal
• /
• v.13 no.5
• /
• pp.51-57
• /
• 2013

Energy saving starts by knowing how much energy is being consumed. A building factor is easier than any other things in energy saving. Since, especially, it is closely connected with user's space-use-patterns and manager's utility-operation-style. An energy metering system lets building users know about energy consumption pattern in buildings and measure energy in real time. Development and materialization of metering systems need more careful plans, so that they depend on a demand of individual facilities and available infrastructures they used to use. But, so far, there is no guidelines how to install metering systems. This paper suggested how to install meters and researched a method for how to analyze by using metered data. For that, Green Building in KIER is used as a test bed. As the results, nevertheless the smallest number of meters is basically one for the whole building energy measuring, it is too limited in analysis. So we needed to add the sort of fuel and utility types and found that it depends on all cases. For this reasons, a guideline should be created in order to install meters as soon as possible. It would be suggest a way to save more energy in building factor.

• Korean Journal of Adult Nursing
• /
• v.27 no.6
• /
• pp.665-672
• /
• 2015

Purpose: The aims of current study were to assess the inhaler competency and medication adherence, and to identify association of inhaler competency with medication adherence in patients with obstructive lung disease. Methods: We did a secondary analysis of the Hanyang Obstructive Pulmonary Evaluation data in a single institution from June 2014 to April 2015 after an approval of Institutional Review Board. A total of 150 patients with asthma or chronic obstructive lung disease participated in the study. Inhaler competency was evaluated accuracy in each step for using metered dose inhaler. Medication adherence was calculated using actually dispensed doses based on the prescribed inhaler doses. Results: Older adults (${\geq}65$) had lower competency in using inhaler (66.7 vs 83.3, z=-4.52, p<.001) and poorer medication adherence (67.7 vs 91.8, $x^2=14.06$, p<.001) than adults (<65). Inhaler competency was associated with medication adherence (p=.26, p=.001). Surprisingly, more than 50% of patients were current smokers. Conclusion: Inhaler competency and medication adherence were lower in older adults with obstructive lung disease than those in adult-age patients. Therefore, an individual education program for older patients should be developed to improve the rates of proper use of inhalers. Nursing management for obstructive lung disease should focus on developing behavioral intervention strategies for smoking cessation.

• Proceedings of the KSME Conference
• /
• 2002.08a
• /
• pp.71-74
• /
• 2002

Fluid flow in a rectangular duct system are measured by W laser doppler velocity meter, and also computed by commercial software of STAR-CD for comparison between then First, for a rectangular duct with 90 degree metered elbow, the fluid flow with Reynolds numbs's of 1,508 is predicted by assumption of both laminar and turbulent models. But, even though the Reynolds number is less than 2,300-3,000, the computation by turbulent model is close to the experimental data. Moeover, the computation by turbulent model for Reynolds number of 11,751 also predicts the experimental data satisfactorily. Second, for a rectangular duct with two branch ducts, the ratios between flow rates in the two branches are invariant to Reynolds number according to both of numerical and experimental results.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
• /
• v.20 no.3
• /
• pp.155-166
• /
• 2008

The performance evaluation of a new building is becoming more important because efficient design alone is often not sufficient to deliver an efficient building. However, there is a lack of standard evaluation methods to measure the energy performance of a new construction that has Energy Conservation Design Measures(ECDMs). This study presents an enhanced method based on calibrated whole-building simulation for evaluating the energy performance of new commercial buildings and demonstrates its use using a case-study building, including: an Energy Use Index(EUI) comparison with sub-metered data and an evaluation of the performance of specific ECDMs. The use of this method has determined that the case-study building was shown to use approximately 47% less energy than the base-case building that has the same shape and function as the case-study building(i.e., calibrated as-built simulation mode]), but doesn't include the simulated ECDMs.

• Journal of Korean Institute of Architectural Sustainable Environment and Building Systems
• /
• v.12 no.6
• /
• pp.627-640
• /
• 2018

Submetering electricity consumption data enables more detail input of end use components, such as lighting, plug, HVAC, and occupancy in building energy modeling. However, such an modeling efforts and results are rarely tried and published in terms of the estimation accuracy of electricity demand. In this research, actual submetering data obtained from a university building is analyzed and provided for building energy modeling practice. As alternative modeling cases, conventional modeling method (Case-1), using reference schedule per building usage, and main metering data based modeling method (Case-2) are established. Detail efforts are added to derive prototypical schedules from the metered data by introducing variability index. The simulation results revealed that Case-1 showed the largest error as we can expect. And Case-2 showed comparative error relative to Case-3 in terms of total electricity estimation. But Case-2 showed about two times larger error in CV (RMSE) in lighting energy demand due to lack of End Use consumption information.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2008.05a
• /
• pp.67-74
• /
• 2008

The regional-scale transient groundwater-river interaction model is developed to gain a better understanding of the regional-scale relationships and interactions between groundwater and river system and quantify the residual river flow after groundwater abstraction from the aquifers with climate variability in the Waimea Plains, New Zealand. The effect of groundwater abstraction and climate variability on river flows is evaluated by calculating river flows at the downstream area for three different drought years (a 1 in 10 drought year, 1 in 20 drought year, and 1 in 24 drought year) and an average year with metered water abstraction data. The effect of future water demand (50 year projection) on river flows is also evaluated. A significant increase in the occurrence of zero flow, or very low flow of 100 L/sec at the downstream area is predicted due to large groundwater abstraction increase with climate variability. Modeling results shows the necessity of establishing dynamic cutback scenarios of water usage to users over the period of drought conditions considering different climate variability from current allocation limit to reduce the occurrence of low flow conditions at the downstream area.

• KIEAE Journal
• /
• v.13 no.6
• /
• pp.55-65
• /
• 2013

Korean Government has developed Sejong City as a new administration city. This city of future was planned and designed toward one of the most eco-friendly city on the basis of ICTs. To attain this object, a carbon emission monitoring system (CEMS) was designed and installed as a part of u-city service which provides various information anytime and anywhere to enrich the people's quality of life. In this paper, at first, the structure and functions of CEMS are introduced. This system is consist of 5 parts - data collection from user and linked public DBs, transforming data into meaningful information for the policy makers, system-user interfacing via statistical tables and graphs, and system maintenance. This system can be operated by the citizen participation through whole the process. With the help of GIS map and graphic interface, statistics of monitored data for both citizen and decision maker provided and after feed-back, they have affected on the behaviour of citizen's energy consumption and related policy as well. By the CEMS, energy consumption data of 124 agreed households were collected during 9 months in 2012. Electricity, gas and water consumption were remote-metered automatically by the system and analysed. This showed that more than 85% of CO2 emission is rely on electricity usage. Furthermore, number of family members and size of house influences on the emission of CO2 by each household together with the life-style of the occupants. Electricity and water consumption showed the seasonal factor while gas consumption represents the number of family members. Even this paper has limitations caused by 9 months of data collection, it shows the policy directions to reduce the emission of CO2 focusing on the house size and number of family members of each households. With the result of this research, life-style of the generation of dwellers should be investigated and the CO2 emission characteristics of other housing type as well for the data building for future policy making.