• Title/Summary/Keyword: hazard monitoring

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Monitoring of Heavy Metals in Fruits in Korea (유통 중인 과일류의 중금속 모니터링)

  • Lee, Jin-Ha;Seo, Ji-Woo;An, Eun-Sook;Kuk, Ju-Hee;Park, Ji-Won;Bae, Min-Seok;Park, Sang-Wook;Yoo, Myung-Sang
    • Korean Journal of Food Science and Technology
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    • v.43 no.2
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    • pp.230-234
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    • 2011
  • According to the Codex committee, the maximum allowable level for lead in fruits is 0.1 mg/kg. This survey was conducted as a surveillance program following the establishment of safety guideline for fruits in Korea. Concentrations of lead (Pb), cadmium (Cd), arsenic (As) and mercury (Hg) were measured in 927 samples using a ICP-MS and a mercury analyzer. The recoveries of microwave digestion method were 86.0-110.4% for Pb, 81.0-104.0% for Cd and 82.0-104.7% for As by standard addition method. The recovery of direct mercury analyzer was 106.5% for Hg. The average levels of Pb in ${\mu}g/kg$ were $10.0{\pm}12.8$ for apple, $8.8{\pm}10.9$ for pear, $4.1{\pm}4.4$ for persimmons, $14.9{\pm}12.3$ for mandarin, $7.1{\pm}6.5$ for orange, $3.1{\pm}3.3$ for banana, $8.8{\pm}8.9$ for kiwi, and $9.3{\pm}9.7$ for mango. The average levels of Cd in ${\mu}g/kg$ were $0.4{\pm}0.3$ for apple, $2.0{\pm}1.6$ for pear, $0.3{\pm}0.3$ for persimmon, $0.1{\pm}0.1$ for mandarin, $0.1{\pm}0.1$ for orange, $1.3{\pm}1.8$ for banana, $0.5{\pm}0.5$ for kiwi, and $0.7{\pm}0.6$ for mango. The average levels of As in ${\mu}g/kg$ were $2.0{\pm}2.1$ for apple, $1.2{\pm}1.3$ for pear, $1.5{\pm}1.2$ for persimmon, $0.8{\pm}0.3$ for mandarin, $1.5{\pm}0.5$ for orange, $1.8{\pm}1.2$ for banana, $1.6{\pm}1.5$ for kiwi, and $1.2{\pm}1.5$ for mango. The average levels of Hg in ${\mu}g/kg$ were $0.5{\pm}0.4$ for apple, $0.3{\pm}0.2$ for pear, $0.2{\pm}0.1$ for persimmon, $0.2{\pm}0.1$ for mandarin, $0.2{\pm}0.1$ for orange, $0.2{\pm}0.0$ for banana, $0.2{\pm}0.2$ for kiwi, and $0.6{\pm}0.2$ for mango. Based on the Korean public nutrition report 2005, these levels (or amounts) are calculated only at 0.17% for Pb, 0.013% for Cd and 0.006% for Hg of those presented in provisional tolerable weekly Intake (PTWI) which has been established by FAO/WHO. Therefore, the levels presented here are presumed to be adequately safe.

A Study on the Improvemental Method for Effective Operating System of Safety Monitoring Activity in case of Gangdong-gu (강동구사례를 중심으로 한 안전모니터링활동의 효율적인 운영시스템 개선방안에 관한 연구)

  • Kim, Sung Soo;Hong, Hyun Sook;Lee, Tae Shik
    • Journal of Korean Society of Disaster and Security
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    • v.6 no.1
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    • pp.9-17
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    • 2013
  • Government ministries operate various system dealing with filed civil appeals. There are representative systems such as Safety Monitoring System of the Ministry of Public Administration and Security (MOPAS), Disaster Premonitory Information System of the National Emergency Management Agency (NEMA), Facilities Hazard Information System of the Ministry of Land, Transportation and Maritime Affairs (MLTM), Environmantal Monitoring System of the Ministry of Environment (ME). The purpose managing these systems is to reduce casualties and to improve safety by preventing disasters and accidents in local communities. This study suggests the method to effectively operate a safety monitoring system which fits to local situations based on the statistical analysis performed on filed complaint cases in Gangdong-gu as a sample region. The cases has been collected since 2012 through the voluntary safety monitoring activity of a specialist who had finished the Emergency and Safety maneger's master course.

Storm Water Logging Analysis and Pre-warning System Construction in Beijing City

  • Yuan, Ximin
    • Proceedings of the Korea Water Resources Association Conference
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    • 2009.05a
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    • pp.2200-2204
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    • 2009
  • In this paper the analysis of natural cause of Beijing Storm inundation and the effect of the human activities has been taken. Flood risk can hardly be eliminated solely by projects. Pre-warning system established is an efficient measure to minimize the influence of flood. Several main functions of this system and their examples are described in the paper, such as: monitoring, forecast, scheme, warning, dynamic decision-making and information publication.

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Displacement Measurement of an Existing Long Span Steel Box-Girder using TLS(Terrestrial Laser Scanning) Displacement measurement Model (TLS 변위계측모델을 이용한 장스팬 철골 박스형 거더의 변위 계측)

  • Lee, Hong-Mn;Park, Hyo-Seon;Lee, Im-Pyeong;Kwon, Yun-Han
    • 한국방재학회:학술대회논문집
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    • 2007.02a
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    • pp.53-56
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    • 2007
  • It was previously introduced a new displacement measuring technique using terrestrial laser scanning (TLS) that remotely samples the surface of an object using laser pulses and generates the three-dimensional (3D) coordinates of numerous points on the surface. In this paper, for an assessment of the capabilities of the measuring technique about existing structures, the field tests for vertical displacement measurement of an existing long span steel box-girder are experimentally carried out. The performance of the technique is evaluated by comparing the displacements obtained from TLS system and displacements directly measured from linear variable displacement transducer (LVDT).

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Hazard analysis and monitoring for debris flow based on intelligent fuzzy detection

  • Chen, Tim;Kuo, D.;Chen, J.C.Y.
    • Structural Monitoring and Maintenance
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    • v.7 no.1
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    • pp.59-67
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    • 2020
  • This study aims to develop the fuzzy risk assessment model of the debris flow to verify the accuracy of risk assessment in order to help related organizations reduce losses caused by landslides. In this study, actual cases of landslides that occurred are utilized as the database. The established models help us assess the occurrence of debris flows using computed indicators, and to verify the model errors. In addition, comparisons are made between the models to determine the best one to use in practical applications. The results prove that the risk assessment model systems are quite suitable for debris flow risk assessment. The reproduction consequences of highlight point discovery are shown in highlight guide coordinating toward discover steady and coordinating component focuses and effectively identified utilizing these two systems, by examining the variety in the distinguished highlights and the element coordinating.

Genotoxicity of the Herbicide 2,4-Dichlorophenoxyacetic acid (2,4-D): Higher Plants as Monitoring Systems

  • Enan, Mohamed R.
    • Journal of Forest and Environmental Science
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    • v.25 no.3
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    • pp.147-155
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    • 2009
  • Higher plants provide valuable genetic assay systems for screening and monitoring environmental pollutants. They are now recognized as excellent indicators of mutagenic effects of environmental chemicals and are applicable for the detection of environmental mutagens both indoor and outdoor. 2,4-dichlorophenoxyacetic acid (2,4-D) is a herbicide commonly used in agriculture. The residues of 2,4-D are present in air, water, soil and edible plants. It constitutes a real hazard to the public health because it's wide spread use in agriculture. Genotoxic effects of 2,4-D on plant cells and potential of higher plants as a biomonitoring system for detecting chemical mutagens are evaluated. It is recommended that higher plant systems have been accepted by regulatory authorities as an alternative biomonitoring system for the detection of possible genetic damage resulting from pollution and the use of environmental chemicals.

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A Study on the Performance Index of System Evaluation for Safety Monitoring Configuration based on Human- Computer Interaction (인간-컴퓨터작업에서 안전감시체계의 시스템평가 수행도지수에 관한 연구)

  • 오영진;이근희
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.14 no.24
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    • pp.199-206
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    • 1991
  • As the development of modern technology, human works shift whose roll from physical conditions to the system monitoring tasks. In this paper, safety-presentation configuration is discussed instead of well-known fault-warning configuration. Safety-presentation configuration is verified as superior to the fault-warning configuration in hazard prevention. The estimation of system states involves the decision making environments which lack of required in formations and most of all the informations are not precise too. And the limitation of human information processing show doubtful results. So the estimation of system states is regardes as fuzzy number, and its operation produces the parameter that explain the discriminability(d), decision criterion ($\beta$) of system operator's behaviors. These two values served as performance indices. Especially the $\beta$ is a good milestone of the operator's altitude degree of caution.

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A Study on development of the real-time monitoring program about the bridge using ubiquitous technology (유비쿼터스 기술을 이용한 교량의 상시 모니터링 프로그램 개발에 관한 연구)

  • Jo, Byung-Wan;Kim, Do-Keun;Park, Jung-Hoon;Kim, Heoun
    • 한국방재학회:학술대회논문집
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    • 2008.02a
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    • pp.493-496
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    • 2008
  • In case of collapsed or damaged Servicing infrastructure, such as a bridge, tunnel, dam, a severe loss may have to be incurred. Therefore, infrastructure should not be designed and constructed properly but also maintained impeccably. This paper tried to build an intelligent bridge maintenance system that warn the people on bridge and control traffic in the danger. For the purpose, diverse wireless sensor fields are composed and structure's database is established. Also the paper develops a bridge maintenance program. Developed programme is regarded as a good tool to provide the utmost bridge management scenario, which is exactly correspondent with the demand and restraint by improving the present bridge management strategy.

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Monitoring of Mycophenolic Acid Trough Concentration in Kidney Transplant under Cyclosporine Is Beneficial in Reducing Acute Rejection within 1 Year

  • Rhu, Jinsoo;Lee, Kyo Won;Park, Jae Berm;Kim, Sung Joo
    • Korean Journal of Transplantation
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    • v.32 no.4
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    • pp.75-83
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    • 2018
  • Background: This study was designed to analyze the clinical usefulness of mycophenolic acid trough concentration monitoring in kidney transplantation patients who were maintained with cyclosporine. Methods: The data of patients who underwent mycophenolic acid trough concentration monitoring after their first kidney transplant between November 2006 and August 2013 and were prescribed with cyclosporine, mycophenolate, and methylprednisolone were reviewed retrospectively. Cox analysis was used to analyze the risk factors for acute rejection within 1 year post-transplantation. Results: Among 90 patients, 41 (45.6%) achieved both the target levels of cyclosporine and mycophenolic acid, while three patients (3.3%) failed to achieve the target level of either cyclosporine or mycophenolic acid. Nine patients (10.0%) only achieved the mycophenolic acid target level and 37 patients (41.1%) only achieved the cyclosporine target level. While patients who achieved only the mycophenolic acid target concentration had no statistically increased risk compared to patients who achieved both target levels (hazard ratio [HR], 1.569; 95% confidence interval [CI], 0.316 to 7.778; P=0.581), patients who only achieved the cyclosporine target concentration showed an increased risk of rejection compared to the both achievement group (HR, 4.112; 95% CI, 1.583 to 10.683; P=0.004). Patients who had no achievement in the target levels showed significantly increased rejection risk compared to the patients who achieved both target levels (HR, 17.811; 95% CI, 3.072 to 103.28; P=0.001). Conclusions: Mycophenolic acid trough concentration monitoring combined with cyclosporine trough concentration monitoring is useful for avoiding acute cellular rejection if the first 1 year post-transplantation.