• Title/Summary/Keyword: Work flow

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433 MHz Radio Frequency and 2G based Smart Irrigation Monitoring System (433 MHz 무선주파수와 2G 통신 기반의 스마트 관개 모니터링 시스템)

  • Manongi, Frank Andrew;Ahn, Sung-Hoon
    • Journal of Appropriate Technology
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    • v.6 no.2
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    • pp.136-145
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    • 2020
  • Agriculture is the backbone of the economy of most developing countries. In these countries, agriculture or farming is mostly done manually with little integration of machinery, intelligent systems and data monitoring. Irrigation is an essential process that directly influences crop production. The fluctuating amount of rainfall per year has led to the adoption of irrigation systems in most farms. The absence of smart sensors, monitoring methods and control, has led to low harvests and draining water sources. In this research paper, we introduce a 433 MHz Radio Frequency and 2G based Smart Irrigation Meter System and a water prepayment system for rural areas of Tanzania with no reliable internet coverage. Specifically, Ngurudoto area in Arusha region where it will be used as a case study for data collection. The proposed system is hybrid, comprising of both weather data (evapotranspiration) and soil moisture data. The architecture of the system has on-site weather measurement controllers, soil moisture sensors buried on the ground, water flow sensors, a solenoid valve, and a prepayment system. To achieve high precision in linear and nonlinear regression and to improve classification and prediction, this work cascades a Dynamic Regression Algorithm and Naïve Bayes algorithm.

Searching for Laws and Systems to Revitalize Private Archives (민간 아카이브 활성화를 위한 법·제도 모색)

  • Sohn, Dong You
    • The Korean Journal of Archival Studies
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    • no.69
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    • pp.7-33
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    • 2021
  • From the beginning of the enactment and implementation of the Public Records Management Act, there has been a steady discussion on the establishment of local archives. Local archives include not only administrative records of local governments, but also private archives such as containing the lives of residents. Along with the academic discussion, there have been movements for local autonomy and decentralization. Currently, interest and discussion on private archiving are in the historical flow. In addition, private archiving has become a social concern because of the establishment of systems such as the Public Records Management Act and the Information Disclosure Act, the establishment of a digital environment, and the spread of the meaning and value of village community activities. There are several government agencies related to private archiving, and the grounds for performing their work are different, and there are many central administrative agencies to which they belong. Therefore, I propose that the National Archives take the lead and form a 'Consortium of Private archives Management Institutions'. The organization should promote first, cooperation of collection information and archives, second, coordination of tasks and functions between institutions, and third, establishment of a nationwide private archives management system. Now is our chance. Instead of reacting on an ad hoc basis, respond systematically with a long-term perspective.

A Study on Counting Measurement of Cultural Infrastructure Visitors: Focused on the Wireless Signal-Based Measurement (무선신호기반 측정방식을 활용한 문화기반시설 이용자 현황 측정에 관한 연구)

  • Kim, Ji-Hak;Park, Geun-Hwa
    • Korean Association of Arts Management
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    • no.59
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    • pp.73-99
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    • 2021
  • Free admission policies have been gradually extended for the public to use cultural facilities free of charge, which lowered the barriers to use those facilities and has a great effect on increasing visitor demands. However, the annual number of visitors which is open to the public isn't quite accurate and varies from institution to institution, which means just a head count. Especially people counter overestimates the number of visitors because it counts visitors in duplicate. Therefore, the purpose of this study is to prepare effective way of grasping the number of visitors using cultural infrastructure. First, comparable number of visitors should be measured by defining the notion of visitor clearly, which has been measured vaguely. Secondly, the problem of duplicate count, which is considered the most problematic, should be solved. Thirdly, the various analysis of visitor behavior should be conducted to provide a high-quality service. To work out the problems above, new measurement will be presented here. This study suggests a state-of-the-art wireless signal-based measurement that could eliminate the duplicate data by collecting MAC address -smart device's distinct signal value. And it also could analyze diverse visitor behaviors by understanding a flow of visitor traffic, duration of stay and revisitation. I would like to examine the possibility and effectiveness of this new measurement by testing it.

Evaluation on Long-term Mechanical Performance and Durability of Recycled Coarse Aggregate Concrete Produced by Two-stage Mixing Approach (2단계 배합방법으로 제조된 순환굵은골재 콘크리트의 장기재령 역학적 성능 및 내구성 평가)

  • Seong-Uk, Heo;Jeong Jin, Son;Chul-Woo, Chung;Young Chan, Kim
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.10 no.4
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    • pp.475-481
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    • 2022
  • Recycled aggregates show high water absorption rate compared to natural aggregates due to microcrack developed during production process and adhered cement pastes at the surface of recycled aggregates. This leads to the deterioration of mechanical properties and slow work flow. Currently it is getting hard to satisfy high demand for natural aggregates. Utilizing recycled aggregate more widely may be a substitutable countermeasure for the shortage of natural resources. In this study, two-stage mixing approach(TSMA) suggested by Tam et al. is used to produce recycled aggregate concrete(RAC) with 100 % replacement of coarse natural aggregate and tests for compressive strength, elastic modulus, and chloride ion diffusion coefficient are conducted to find out the effect of TSMA compared to normal mixing method. According to experimental result compressive strength and elastic modulus of RAC with TSMA was superior to those of RAC with normal mixing irrespective of water-cement ratio, and in some cases mechanical properties of RAC with TSMA approached to those of natural aggregate concrete(NAC). However, chloride ion diffusion coefficient of RAC was higher than that of NAC. This illustrates that TSMA is not an appropriate method in reducing chloride ion diffusion coefficient, resulting in inconsequential contribution of TSMA to the durability of RAC.

Analysis on Media Reports of the 「Security Services Industry Act」 Using News Big Data -Focusing on the Period from 1990 to 2021-

  • Cho, Cheol-Kyu;Park, Su-Hyeon
    • Journal of the Korea Society of Computer and Information
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    • v.27 no.5
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    • pp.199-204
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    • 2022
  • The purpose of this study is to broaden the understanding of the Security Services Industry Act, and also to examine the meanings of various phenomena by analyzing the media report big data rather than the researchers' perspective on the Security Services Industry Act. In the research method, this study searched for a keyword 「Security Services Industry Act」 that prescribes the security work as an important subject of crime prevention and maintenance of public order in Korea. The data was searched from 1990 to 2021 the BIG KINDS could provide. Also, for the concrete analysis during the period of data search, it was divided into settlement period(1976~2001), growth period-quantitative(2002~2012), and growth period-qualitative(2013~2021). In the results of this study, the media report perception of the Security Services Industry Act is continuously emphasizing the social roles and importance of private security according to the flow of time. The consequent marketability of private security will play great roles in the protection of people's lives and properties in the combination with various other industries in the future. However, the private security industry that provides public peace service together with the police, could be rising as an element that hinders the development of private security industry because of various social issues caused by legal regulations and illegal problems, so it would be necessary to more strengthen its responsibility and roles accordingly.

A study on Digital Agriculture Data Curation Service Plan for Digital Agriculture

  • Lee, Hyunjo;Cho, Han-Jin;Chae, Cheol-Joo
    • Journal of the Korea Society of Computer and Information
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    • v.27 no.2
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    • pp.171-177
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    • 2022
  • In this paper, we propose a service method that can provide insight into multi-source agricultural data, way to cluster environmental factor which supports data analysis according to time flow, and curate crop environmental factors. The proposed curation service consists of four steps: collection, preprocessing, storage, and analysis. First, in the collection step, the service system collects and organizes multi-source agricultural data by using an OpenAPI-based web crawler. Second, in the preprocessing step, the system performs data smoothing to reduce the data measurement errors. Here, we adopt the smoothing method for each type of facility in consideration of the error rate according to facility characteristics such as greenhouses and open fields. Third, in the storage step, an agricultural data integration schema and Hadoop HDFS-based storage structure are proposed for large-scale agricultural data. Finally, in the analysis step, the service system performs DTW-based time series classification in consideration of the characteristics of agricultural digital data. Through the DTW-based classification, the accuracy of prediction results is improved by reflecting the characteristics of time series data without any loss. As a future work, we plan to implement the proposed service method and apply it to the smart farm greenhouse for testing and verification.

Comparison of applicability of HVAC and air cleaners in a subway station platform against airborne infection of SARS-CoV-2 (지하역사 승강장에서 코로나19 바이러스 공기감염 대응 공기조화기와 공기청정기의 적용 효과 비교)

  • Lee, Gunhee;Kim, Sang Bok;Park, Inyong;Hong, Kee Jung;Lee, Yeawan;Kim, Hak-Joon;Kim, Yong-Jin;Han, Bangwoo
    • Particle and aerosol research
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    • v.18 no.3
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    • pp.51-59
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    • 2022
  • In this work, virion concentration and its dose changes by HVAC and air cleaners were estimated in a subway station platform to control airborne infection of SARS-CoV-2. Collection efficiencies with particle size were measured for the air filter equipped in a HVAC in one subway station in Daejeon. Indoor PM2.5 changes according to outdoor PM2.5 with time were also measured to estimate air infiltration rate in the subway station platform. When infected persons generate virions by 104, 105, 106, 3 × 106 and 5 × 106 h-1 in a 2,400 m3 volume platform, the concentration and dose were estimated as 9, 92, 275 and 458 virions/m3 and 4, 43, 130 and 217 virions after 1 hour exposure, respectively. The concentration and dose were reduced by 70%, and 64%, respectively by operations of both HVAC (with a flow rate of 16,000 m3/h, MERV 11) and ten air cleaners(with total CADR 10,740 m3/h) compared to those without operation of both HVAC and air cleaners. However, virion dose in the platform was estimated to be too low at the general conditions due to a large space, a high air infiltration (3 h-1) and a short residence time (usually < 10 mins) in the platform irrespective of the operations of HVAC or air cleaners. HVAC with filters and air cleaners would be more necessary in the concourse or shopping areas in the subway stations to reduce the infection dose from a few hundred to several tens virions in a hour.

A Study on the Analysis of Current Issues and the Operation Plan of News Media Asset Management System in Korean Broadcasting Companies: the Case Study of KBS Digital Newsroom (방송사 보도영상관리시스템 운영 현황분석과 개선안 연구 - KBS 디지털뉴스룸 사례를 중심으로 -)

  • Choi, Hyo-jin;Park, Choonwon;Kim, Sooyoung;Song, Jeonga;Park, Yeajin;Shin, Bongseung;Ji, Sunho;Sun, Sangwon
    • Journal of the Korean BIBLIA Society for library and Information Science
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    • v.33 no.3
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    • pp.123-155
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    • 2022
  • This study focuses on the management of the news production system in broadcasting companies. This paper concentrates on the process of data registration and metadata management in order to examine whether the currently produced news can have value as a 'public record' in the long term, and whether reliable and accurate information is preserved. In addition, the user experience in the current system is analyzed through in-depth interviews with Ingest Managers, Editors, and Archive Managers, who are closely related to metadata creation compared to other members of the its News Department. Finally, a sustainable metadata quality management method is sought to increase the value of news footage as a 'public record'. In this study, these points can be found out: the metadata of the news agency footage is input manually according to the user's will or working style, that is, the user-friendly metadata input system is insufficient. Accordingly, it can be seen that the quality of the metadata of the news video continues to deteriorate. As an alternative to overcome this, it is found that work flow improvement, system improvement, classification system and metadata improvement plan, etc. are definitely necessary in the short and long term.

A study on human resource management in the Joseon Dynasty through Mokminsimseo (목민심서를 통해 본 조선시대 인적자원 관리에 대한연구)

  • Kim, Bong Wha
    • The Journal of the Convergence on Culture Technology
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    • v.8 no.5
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    • pp.409-421
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    • 2022
  • The purpose of this study is to understand the flow of personnel management in the Joseon Dynasty through Dasan Jeong Yak-yong's Mokminsimseo, and to understand how it is being used not only in modern administrative organizations but also in social welfare organizations. As a result, first, first, among the human resource management areas of the Joseon Dynasty, the area occupied the most was related to integrity. These are the contents that are widely used in evaluation methods and scope, value standards, and use of evaluation today. Second, regarding the recruitment and recruitment of talents in the Joseon Dynasty, various methods were presented to enhance the appropriateness, fairness of hiring, and the effectiveness of hiring human resources. This has significant implications even today as it specifically mentions the appropriate appointment and scale of human resources, emphasizing that personnel is everything. Finally, This is different from the human resource management of the Joseon Dynasty in that it is being converted to a compensation paradigm rather than discipline as a way to inspire the motivation of workers today and increase work efficiency. In addition, professionalism was emphasized in the education and training of public officials, and the maintenance of dignity and leadership in body and mind is emphasized, showing that even today, the virtues required of workers in public organizations, including social welfare organizations, are being maintained.

FunRank: Finding 1-Day Vulnerability with Call-Site and Data-Flow Analysis (FunRank: 함수 호출 관계 및 데이터 흐름 분석을 통한 공개된 취약점 식별)

  • Jaehyu Lee;Jihun Baek;Hyungon Moon
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.33 no.2
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    • pp.305-318
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    • 2023
  • The complexity of software products led many manufacturers to stitch open-source software for composing a product. Using open-source help reduce the development cost, but the difference in the different development life cycles makes it difficult to keep the product up-to-date. For this reason, even the patches for known vulnerabilities are not adopted quickly enough, leaving the entire product under threat. Existing studies propose to use binary differentiation techniques to determine if a product is left vulnerable against a particular vulnerability. Despite their effectiveness in finding real-world vulnerabilities, they often fail to locate the evidence of a vulnerability if it is a small function that usually is inlined at compile time. This work presents our tool FunRank which is designed to identify the short functions. Our experiments using synthesized and real-world software products show that FunRank can identify the short, inlined functions that suggest that the program is left vulnerable to a particular vulnerability.