• Title/Summary/Keyword: Activity Cost

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Smart Phone Sensor-Based Indoor Location Tracking System for Improving the Location Error of the Radio Environment (무선 환경의 위치 정보 오차 개선을 위한 스마트폰 센서 기반 실내 위치 추적 시스템)

  • Lee, Dae-Young;Kang, Young-Heung
    • Journal of Advanced Navigation Technology
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    • v.19 no.1
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    • pp.74-79
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    • 2015
  • In this paper, in order to improve the error is utilized to location tracking the smart sensor detects a walking information user, RSSI is to provide an indoor position tracking system that is capable of correcting an error in terms weak. The acceleration sensor is able to detect the activity in the user walking and detects the number of step and the moving distance using the same. The Direction sensor is utilized as a digital compass, to detect the moving direction of the user. As a result of detecting the walking information using the sensor, it can be showed that this proposed indoor positioning system has a high degree of accuracy for the number of steps and the movement direction. Therefore, this paper shows that the proposed technique can correct the error of the location information to be problem in the conventional indoor location system which uses the only Wi-Fi APs by estimating the user's movement direction and distance using the sensors in smartphone without an additional equipment and cost.

Survey for U-Greenhouse System Technology (U-온실 시스템 기술에 대한 분석)

  • Park, Sang-Oh;Lee, Yang-Sun;Kim, Se-Han;Park, Ji-Soo;Yi, Ki-Jung;Park, Jong-Hyuk
    • Journal of Advanced Navigation Technology
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    • v.16 no.1
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    • pp.89-95
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    • 2012
  • This paper introduces domestic and international trends and researches related with U-Greenhouse systems. USN (Ubiquitous Sensor Networks), along with the development of networks as well as science and technology, is a new computing paradigm which is the convergence of user-oriented physical activity space and virtual space of electronics and computing and also provides services according to change in surrounding environment at anytime and anywhere. The U-Greenhouse system is to apply USN to agricultural production, logistics and distribution management which are relatively insufficient to utilize IT technology. Thus, applying u-IT technology to agriculture can reinforces international competitiveness of the agricultural sector through the effects such as cost cutting as a rise in output, logistics and distribution management.

Pure inorganic protective silica coating on stainless steel prepared at low heat treatment temperature

  • Hwang, Tae-Jin
    • Proceedings of the Materials Research Society of Korea Conference
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    • 2010.05a
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    • pp.6.2-6.2
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    • 2010
  • Stainless steel is widely known to have superior corrosion properties. However, in some harsh conditions it still suffers various kinds of corrosions such as galvanic corrosion, pitting corrosion, intergranular corrosion, chloride stress corrosion cracking, and etc. For the corrosion protection of stainless steel, the ceramic coatings such as protective silica film can be used. The sol-gel coating technique for the silica film has been extensively studied especially because of the cost effectiveness. It has been proved that silica can improve the oxidation and the acidic corrosion resistance of metal surface in a wide range of temperatures due to its high heat and chemical resistance. However, in the sol-gel coating process there used to engage a heat treatment at an elevated temperature like 500C600C where cracks in the silica film would be formed because of the thermal expansion mismatch with the metal. The cracks and pores of the film would deteriorate the corrosion resistance. When the heat treatment temperature is reduced while keeping the adhesion and the density of the film, it could possibly give the enhanced corrosion resistance. In this respect, inorganic protective silica film was tried on the surface of stainless steel using a sol-gel chemical route where silica nanoparticles, tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES) were used. Silica nanoparticles with different sizes were mixed and then the film was deposited on the stainless steel substrate. It was intended by mixing the small and the large particles at the same time a sufficient consolidation of the film is possible because of the high surface activity of the small nanoparticles and a modest silica film is obtained with a low temperature heat treatment at as low as 200C. The prepared film showed enhanced adhesion when compared with a silica film without nanoparticle addition. The films also showed improved protect ability against corrosion.

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A Study on Process Improvement by Incorporating the Concept of Six-Sigma into Quality Circle Activity (품질분임조와 6시그마 결합을 통한 공정개선 - 제조업 사례를 중심으로 -)

  • Kim, Jae-Hee;Doo, Hee-Yong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.8 no.3
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    • pp.673-681
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    • 2007
  • The integration of Quality Circles and Six-Sigma has gained attentions for the attainment of enhanced customer satisfaction, costs reduction, and improved business performance. The purpose of this paper is to verify the benefit from the integration of Quality Circles and Six-Sigma by applying the integrated process for an alcohol manufacturing line. In the integrated process, we used the first three steps of Six-Sigma of Define, Measure, and Analyze(D-M-A) and then applied the concept of Quality Circle, which has good performance in the Improvement and Control(I-C) process. For the selection of the theme of quality circles, Analytic Hierarch Process(AHP) is used, and we also employed the experimental design, which is designed to find an optimal operating condition. Furthermore, the results of the economic analysis confirm that the integration process would be successful in reducing the incidence of defects and the quality cost.

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Design of Building Biomertic Big Data System using the Mi Band and MongoDB (Mi Band와 MongoDB를 사용한 생체정보 빅데이터 시스템의 설계)

  • Lee, Younghun;Kim, Yongil
    • Smart Media Journal
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    • v.5 no.4
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    • pp.124-130
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    • 2016
  • Big data technologies are increasing the need for big data in many areas of the world. Recently, the health care industry has become increasingly aware of the importance of disease and health care services, as it has become increasingly immune to prevention and health care. To do this, we need a Big data system to collect and analyze the personal biometric data. In this paper, we design the biometric big data system using low cost wearable device. We collect basic biometric data, such as heart rate, step count and physical activity from Mi Band, and store the collected biometric data into MongoDB. Based on the results of this study, it is possible to build a big data system that can be used in actual medical environment by using Hadoop etc. and to use it in real medical service in connection with various wearable devices for medical information.

Scalability Estimations of a Workcase-based Workflow Engine (워크케이스 기반 워크플로우 엔진의 초대형성 성능 평가)

  • Ahn, Hyung-Jin;Park, Min-Jae;Lee, Ki-Won;Kim, Kwang-Hoon
    • Journal of Internet Computing and Services
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    • v.9 no.6
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    • pp.89-97
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    • 2008
  • Recently, many organizations such as companies or institutions have demanded induction of very large-scale workflow management system in order to process a large number of business-instances. Workflow-related vendors have focused on physical extension of workflow engines based on device-level clustering, so as to provide very large-scale workflow services. Performance improvement of workflow engine by simple physical-connection among computer systems which don't consider logical-level software architecture lead to wastes of time and cost for construction of very large-scale workflow service environment. In this paper, we propose methodology for performance improvement based on logical software architectures of workflow engine. We also evaluate scalable performance between workflow engines using the activity instance based architecture and workcase based architecture, our proposed architecture. Through analysis of this test's result, we can observe that software architectures to be applied on a workflow engine have an effect on scalable performance.

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The Economic Impacts of Subsidizing Water Industry Under Greenhouse Gases Mitigation Policy in Korea: A CGE Modeling Approach (국가 온실가스 저감정책과 물산업 지원의 경제적 영향 분석 - 연산일반균형모형 분석)

  • Kim, Jae Joon;Park, Sung Je
    • Journal of Korea Water Resources Association
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    • v.45 no.12
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    • pp.1201-1211
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    • 2012
  • This paper constructed the single country sequential dynamic CGE model to analyze the economic impacts of subsidizing water industry under the GHG emission abatement policy in Korea. We introduced the carbon tax to reduce the GHG emission and made two scenarios. One is to transfer the total tax revenue to household. The other is to mix the tax transfer and water industry support. Our Simulation results show that the macroeconomic effects might be positive by subsidizing water industry compared with the pure tax transfer. However, the support of water industry doesn't contribute to head for the non-energy intensive economy because it's economic activity highly depend on fossil energy and energy intensive products as intermediate demand. This means that it is important to make efforts on the cost effective measures such as energy technology progress, alternative energy development, and energy efficiency improvement in water industry against climate change policy.

Evaluation of Energy Cost in Terms of Oxygen Uptake by Measuring Heart Rate During Tennis Games (심박수에 의한 테니스경기의 에너지 소요량 측정)

  • Cho, Byung-Hee;Chung, Kyou-Chull;Hong, Yeon-Pyo
    • Journal of Preventive Medicine and Public Health
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    • v.17 no.1
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    • pp.289-294
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    • 1984
  • The energy expended while playing tennis was determined from the players heart rate and from the amount of oxygen they consumed. This study was made using eight healthy but unathletic male college students. Expired air was collected for 2 minute periods during each game by the Douglas bag method. Samples were collected when serving and receiving. The air collected was measured using a wet test gas meter. The amount of air collected was expressed in STPD. Oxygen consumption was determined by measuring the oxygen content of the expired air with a Orzat gas analyzer. The energy expended during the tennis games was calculated indirectly. The caloric coefficient of oxygen was multiplied by the volume of oxygen consumed. The caloric coefficient of oxygen varied from 4.6 to 5.1 kcal/liter of oxygen. In this study the value of 5 kcal/liter of oxygen was used in the calculations. The accuracy of the measurements of energy expended was tested using regression analysis of the measured volume of oxygen. The mean values of heart rate, oxygen consumed and energy expended did not vary when the activity of serving and receiving was compared. The mean value of oxygen consumed during play was 1.4329±282ml/min or 21.6±4.0ml/kg/min. The energy expended was 7.15±1.46kcal/min or 6.45±1.23kcal/kg/min. The values were equivalent to 5.5 mets. When the levels of oxygen consumed were estimated using the formulas, they were found to be higher than the measured levels. The estimated amounts, however, were within 25% of the measured amounts.

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A Study on the Effect of Information Technology on Process Improvement (프로세스 개선에 있어서 정보기술의 영향과 효과 분석: 품질경영 분임조 활동을 중심으로)

  • 서영호;김남희
    • Journal of Korean Society for Quality Management
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    • v.26 no.2
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    • pp.61-81
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    • 1998
  • This research studies the role of IT (Information Technology) in improving productivity of a company through samll group activities. For this purpose, this research analyzed the samll group activities of the company as to how IT was employed bo improve business processes. Cases of small group activities that were conducted from January, 1996 to December, 1996 in a Korean company (name withdrawn) were analyzed. Eight out of eleven small group activities have been studied. They were examined as to the effect of IT in time and cost savings, reduction in manpower and so on. TQM is the activity of process improvement based on the existing processes in pursuit of satisfaction of customers' needs. This study analyzed how IT was used to solve the current problem in business processes. As a result of the case study, it is found that TQM activities with IT could reduce expenses significantly. More specifically, expenses have been cut down by 56% a year on average. By improving the business processes through the activities of TQM which used IT, companies could remove the unnecessary business processes and the duplicated business processes. In other words, with the use of IT in TQM activities, they could move closer to goals of the satisfaction of the customers' needs by reducing expenses and time. This study examined the role of IT from the point of view of business process improvement. Internally, IT has a positive impact on reducing expenses, processing time, manpower and so forth. Externally, it plays an important role of company's gaining competitive advantage through the satisfaction of customers and stakeholders. In conclusion, the proper use of IT will significantly increase the performance of a company.

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A Production-Based Approach to Travel Choice Modeling (생산기반 가정아래서의 통행선택행위분석)

  • Mun, Dong-Ju
    • Journal of Korean Society of Transportation
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    • v.25 no.5
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    • pp.209-231
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    • 2007
  • This paper suggested an approach to characterize travel choice behaviors using the implicit price instead of the indirect utility. The choice criterion to compare the implicit prices of available trip options was developed from the utility maximization problem of a trip maker which is supposed to choose the best option from the available ones differentiated by only by the quantitative attributes such as travel cost and time but also by qualitative attributes such as comfort and safety. The utility maximization problem is constructed under household production theory, and is incorporated with a special kind of joint homogeneous production functions. The implicit price of a certain trip option is the sum of the monetary price and the multiple of travel time and the value-of-travel-time, and the value-of-travel-time refers to the portion of wage, which can be assignable to the trip-making activity. This choice criterion is statistically identifiable, and behaviorally plausible. Moreover, this criterion has the expression simpler than the indirect utility, and therefore could be an effective target of the statistical estimation for travel choice behaviors.