• Title/Summary/Keyword: Daily Operation

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Analysis of Operating Characteristics of Large-scale Solar Thermal System Using Two Types of Collectors (두 종류 태양열 집열기를 이용하는 대규모 태양열 시스템의 동작특성 분석)

  • Lee, Dong-Won;Heo, Jae-Heok;Kim, Min-Hwi
    • Journal of the Korean Solar Energy Society
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    • v.37 no.2
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    • pp.67-75
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    • 2017
  • We have investigated the operating characteristics of $1,600m^2$ large-scale solar thermal system installed in an eco-friendly energy town in Chungbuk Innovation City. The operation criteria of the collecting pump and storage pump were different from the existing standard, and it was confirmed that each pump works well according to the changed criteria. Based on the data of the representative day, the daily collecting heat (efficiency) and the production (storing) heat (efficiency) were estimated. It was confirmed that the daily collecting heat (efficiency) of the flat plate type was higher than that of the evacuated tube type, but the useful heat production was more in evacuated tube type collector.

Assessing Nitrogen and Phosphorus in Excreta from Grower-finisher Pigs Fed Prevalent Rations in Vietnam

  • Vu, T.K.V.;Sommer, G.S.;Vu, C.C.;Jorgensen, H.
    • Asian-Australasian Journal of Animal Sciences
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    • v.23 no.2
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    • pp.279-286
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    • 2010
  • Livestock production in Vietnam is, as in most Asian countries, increasing rapidly and changing into specialized highly intensified operations. The volume of animal excreta generated exceeds the capacity of the operation land base and cannot be utilized efficiently. As a consequence, there is a loss of plant nutrients from livestock farms that causes environmental pollution. This study carried out a feed and excretion experiment measuring fecal characteristic, daily fecal production, daily nitrogen and phosphorous excretion from grower-finisher pigs fed prevalent rations in Vietnam. Furthermore, equations for assessing the excretion were tested, which can be used in farm models for optimal recycling of manure while focusing on reducing pollution. The results indicated that fecal production and nutrient excretion were affected by the different rations tested. This study showed that five selected equations for predicting excretion from grower-finisher pigs in Danish conditions can also be used with precision in Vietnamese pig farming systems. The equations have been proven valid and can, therefore, be used as a much needed tool for assessing fecal production and nitrogen in excreta on pig farms. The study also showed that about 12% of nitrogen excreted was emitted during housing. Waste water contains more than half of the nitrogen excreted, mainly in ammonium form which has a high potential for gaseous emission.

A Study on the Clinical Records of 『The Daily Records of Royal Secretariat of Chosun Dynasty』 (『승정원일기(承政院日記)』의 진료기록 연구)

  • Hong, Se Young;Cha, Ung-Seok;Kim, Nam Il
    • The Journal of Korean Medical History
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    • v.21 no.2
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    • pp.1-11
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    • 2008
  • "承政院日記" is a journal written by the scribes belonging to the Royal Secretariat and consists of objective and detailed records about events, dialogs, and actions that happened in the presence of the king and also collections of all the documents output by the Royal Secretariat. The medicine-related records in "承政院日記" are mainly records of the medical examination and treatment of the king and the royal family and related documents of operation. Of the many different entries involved with clinical practices, this study focuses on the medical examination and treatment of the king. Through the case studies displayed in the clinical records of "承政院日記", trial and error of its time as well as clinical results can be verified. Sorting out of affirmative tradition that could not be handed down due to institutional interruption is also made possible through comparison of effective treatment methods of late Chosun dynasty including patterns or distinctive methods of treating specific diseases against their counterparts in Traditional Korean Medicine of today.

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Development of Daily Operation Program of Battery Energy Storage System for Peak Shaving of High-Speed Railway Substations (고속철도 변전소 피크부하 저감용 ESS 일간 운전 프로그램 개발)

  • Byeon, Gilsung;Kim, Jong-Yul;Kim, Seul-Ki;Cho, Kyeong-Hee;Lee, Byung-Gon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.3
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    • pp.404-410
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    • 2016
  • This paper proposed a program of an energy storage system(ESS) for peak shaving of high-speed railway substations The peak shaving saves cost of equipment and demand cost of the substation. To reduce the peak load, it is very important to know when the peak load appears. The past data based load profile forecasting method is easy and applicable to customers which have relatively fixed load profiles. And an optimal scheduling method of the ESS is helpful in reducing the electricity tariff and shaving the peak load efficiently. Based on these techniques, MS. NET based peak shaving program is developed. In case study, a specific daily load profile of the local substation was applied and simulated to verify performance of the proposed program.

A Case Study on the Space Use Pattern and Behavior of the Elderly with Dementia in Common Space of Nursing Home (노인전문요양시설 치매노인의 공용공간 이용실태 및 행동특성에 관한 사례연구)

  • Yoon, Young-Sun;Byun, Hea-Ryung
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2005.11a
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    • pp.89-92
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    • 2005
  • The purpose of this study was to clarify the space use pattern and the daily living activities of the elderly with dementia in the common space (living room) of nursing home. The subjects were 2 units(living room) of the nursing home. For this, researcher visited from June 20 to July 2 and collected data by observations of behavior of the elderly with dementia in common space(living room) and interviews with staff for the information about basic characteristics of the elderly with dementia and administration and operation of the facilities. The data were analyzed using the frequency and percentage. The results revealed as follows: first, the daily living activities of the elderly with dementia in common space tended to focus on self-concentration type and physical environment-interest type. Second, physical environmental -interest type. Second, physical environmental characteristics of common space affected space usage pattern of the elderly with dementia. And it was perceived like as living oriented space, social interaction space, facility space, staff oriented space. Conclusively it was suggested to plan dining space as semi-private space, day corner as semi-public space.

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Analysis of Infiltration/Inflow at Dry and Rainfall Periods in Separated Sewer System of Nakdong River Basin (건기와 우기시 낙동강 유역 분류식 하수관거의 유입수/침입수의 분석)

  • Gu, Joung-Eun;Lee, Hong-Shin;Son, Gun-Tae;Lee, Sung-Eok;Lee, Seung-Hwan
    • Journal of Korean Society of Water and Wastewater
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    • v.25 no.1
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    • pp.75-84
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    • 2011
  • This study was conducted to provide a basic information for the establishment of operation and treatment processes in sewer system of Nakdong river basin to minimize the overall pollutants loading to water body. Sewage flowrates were regularly measured and monitored at various sampling points of newly-built separated sewer system located in G City GA sites. To assess the inflow sewage flowrate, various calculating methods such as water-use evaluation, average-minimum daily flow quality evaluation, minimum daily flow evaluation, night water-use evaluation were used. Average I/Is were calculated except water-use evaluation. Average I/Is were found to be 6.5 $m^{3}/d$, 3.5 $m^{3}/d$, 7.7 $m^{3}/d$ at GA-1, GA-2, GA-3 points respectively. I/I ratios of three areas were found to be 4.8 %, 2.0 % and 2.7 % respectively and were obviously lower than those of the other separated sewer systems as shown in the previous studies.

Development of Wearable Devices Equipped with Multi Sensor that can Analyze and Manage Symptoms of Parkinson's Patients as data (파킨슨 환자의 증상들을 데이터화하여 분석하고 관리할 수 있는 다양한 센서가 탑재된 웨어러블 디바이스 개발)

  • Kim, SangHyeok;Jeon, YeongJun;Kang, SoonJu
    • IEMEK Journal of Embedded Systems and Applications
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    • v.17 no.1
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    • pp.19-24
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    • 2022
  • Through the development and dissemination of embedded devices, studies that may help patients are rapidly emerging. Recently, as wearable devices have become one of the ways to diagnose diseases in daily life, they are being studied as a way to assist severely ill patients to lead their daily lives. Among them, a method of detecting and giving signals to detect and solve symptoms using acceleration sensors to diagnose Parkinson's disease is being studied, and there is no study to measure and analyze various factors that can affect Parkinson's disease. To solve them, we designed and developed a wearable device, P-Band, with various sensors capable of diagnosing related symptoms, including acceleration sensors capable of diagnosing Parkinson's disease. In this paper, the overall structure of the P-Band and the description and operation method of the measurable sensors are presented. In addition, it was confirmed that the symptoms of Parkinson's patients could be determined complexly through the results measured in actual patients.

Designing Study on Techno-Economic Assessment of Solar Photovoltaic Mini-Grid Project in Nepal

  • Poudel, Prasis;Bae, Sang-Hyun;Jang, Bongseog
    • Journal of Integrative Natural Science
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    • v.15 no.2
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    • pp.89-97
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    • 2022
  • This paper presents the comprehensive feasibility study of solar mini-grid project located in Bajhang District, Sudur Paschim Province, Nepal. The study has been conducted with the aim of developing a suitable size solar mini-grid system to meet electricity demand of proposed settlements of the village people. The study forecasts that the estimated average daily peak power consumption of load is about 20kW and average daily energy demand of load is about 100-150kWh/day in the base year 2022. The shared ratio of productive end uses is about 25% of the total power consumption and about 27% of the total energy demand, which will be used for small business/income generation activities and required 45kWp size solar power generation mini-grid system. The estimated project cost for the proposed 45kW solar mini-grid system technology, including 3 years of operation & maintenance, as well as power distribution network up to end user's premises is about 0.24 million USD. It is concluded that 45kWp photovoltaic mini-grid is feasible for the location.

A Study on the Factors Affecting the Low Back Pain of Workers in Hospital (병원 근무자의 요통 발생 요인에 관한 연구)

  • Jeong, Jin-Young;Son, Kyung-Hyun
    • Journal of Korean Physical Therapy Science
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    • v.16 no.3
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    • pp.55-66
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    • 2009
  • Background: The purpose of this research was to investigate the factors affecting the low back pain of workers in hospital. 214 subjects waking at two general hospitals in Yosu city participated in this survey. Subjects consisted of doctors, nurses, medical engineers, officers and general laborers. The survey data were collected by a written questionnaire which made out by themselves for 25 days, from fourth August to 29th August, 2008. Methods: The questionnaire consisted of four categories, general, occupational, working habitual and the daily living characteristics. The collected data were analyzed by Chi-square test based on the present or absent of low back pain. Results: 1. In the general characteristics, low back pain had no significant relationship to all factors, sex, ago, body mass index, weight and height. 2. In the occupational characteristics, the phase of distribution of low back pain had statistical significant differences in the working hours a week, satisfaction of pay, satisfaction of occupation(p<0.05). However low back pain did not significantly related to the kind of occupation, period of work and degree of stress. 3. In the habitual characteristics, low back pain was significantly influenced by working posture, frequency of using lumbar and heavy material lifting, monotonous repetition of working operation and noise(p<0.05). No significant difference was shown in the factor of convenience of chair. 4. In the daily living characteristics, low back pain shown the significant differences in walking time a day, status of health and smoking pattern(p<0.05). there were, however, no significant differences in the aspect of the kind of house and bed, sleeping attitude, driving, riding time on the vehicle, exercising, frequency of cultural life and drinking alcohol. Conclusion: when I see above resultants totally, it appears a higher incidence caused by working environment rather than living habit and then consequently compared to hospital workers, they also have high incidence like others. In order to reduce incidence of low back pain and enjoy the our life we need to educate ourselves preventing program for low back pain and try to effort for preventing of low back pain on each department and individual.

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An Analysis on the System and Operation of Occupational Education and Training for Construction Workers (건설근로자의 직업교육훈련 제도 및 운영실태 분석)

  • Oh Chi-Don;Son Chang-Baek
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2004.11a
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    • pp.261-264
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    • 2004
  • The study, by reviewing and analysing the system of occupational education and training, aims to provide some substantial informations for the activation of occupational education and training in the construction sector. The result shows that the current system doesn't substantially reflect the realities of employment structure in the sector, and thus, fails to respond to skilled-worker development. It is also observed that most of the occupational education and training institutions have difficulties in recruiting trainees due to daily construction workers' negative attitudes toward the current system. Therefore, it is necessary i) to improve occupational education and training system, ii) to tackle in-depth analysis of daily construction workers' reasons for the negative perceptions, and iii) to develop the responding alternatives.

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