• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.31 no.4
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• pp.295-303
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• 2021

Objective: Paint manufacturing industry workers are exposed to various lung cancer carcinogenic substances including hexavalent chromium and crystalline silica. Studies have been conducted on lung cancer in Paint manufacturing industry workers and the concentration of hexavalent chromium in paint industry; however, the concentration of crystalline silica and hexavalent chromium and cases of lung cancer in a single Paint factory has never been reported in Korea. Methods: To determine whether the cancer was related to his work environment, we assessed the level of exposure to carcinogens during pouring and mixing talc and pigment. In addition, a mask fit test was performed for the worker. Results: Analysis of talc and silica bulk powder materials showed that crystalline silica (quartz) was 5% in talc and 100% in silica. The green and yellow pigments contained 87% and 92% of lead chromate, respectively. Our quantitative analysis of pigment powder samples showed that the hexavalent chromium contents quantified in the green and yellow pigment samples were 87% and 92%, respectively. In order to estimate his exposure level of hexavalent chromium, we measured a personal exposure level of hexavalent chromium for a worker in accordance with the National Institute for Occupational Safety and Health #7605 method. The results showed that the worker was exposed to the high level of hexavalent chromium (0.033 mg m-3). In addition, the talc powder also contained 5% quartz, and the worker's exposure level to respirable quartz exceeded OEL. As a result of the respiratory protection fit test for workers, the overall Fit Factor was '15' when wearing a second-grade mask and '25' when wearing a first-grade mask, significantly lower than the US Occupational Safety and Health Agency (OSHA) pass value of "100". Conclusion: Workers who pouring and mixing powder materials such as talc or colored pigments in paint manufacturing company may be exposed to high concentrations of carcinogenic substances. These findings indicate that it is necessary to local ventilation system inspection, safety and health education for employers and workers, and periodically monitoring and manage the working environment.

• Korean Journal of Food Science and Technology
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• v.53 no.6
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• pp.701-705
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• 2021

Although the breed protection rights of Jangsaemi garlic were registered in 2012, the cultivation area was not large and no related papers were found, so this study was conducted. Potassium was the highest inorganic content of Jangsaemi garlic, followed by nitrogen, sulfur, and phosphorus. Allin and allicin were also present at 9.73±0.97 and 1.65±0.15 mg/g, respectively. The solid content was 7.90±0.00°Bx, and the reducing sugar was 33.42±1.79 mg GE/g. The total phenol and flavonoid contents were 80.35±2.67 mg GAE/100 g and 33.80±2.17 mg QE/100 g, respectively. The antibacterial activity of Jangsaemi garlic was higher in gram-positive bacteria than in gram-negative bacteria, especially Staphylococcus epidermidis and Micrococcus luteus. The results of these studies are expected to provide useful information for farmers growing Jangsaemi garlic in the future.

• The Korean Journal of Archival Studies
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• no.10
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• pp.3-26
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• 2004

ISO 15489:2001 addresses the principles and requirements with which organizations, both public and private, should comply on the management of their records to ensure that adequate records are created, captured and managed. The standard defines the characteristics that a record should have through records management system as follows: authenticity, reliability, integrity, and usability. Authenticity means that records can be proven to be what it purports to be, to have been created or sent by the person purported to have created or sent it, and to have been created or sent at the time purported. Reliability means that the contents of the records can be trusted as a full and accurate representation of the transactions, activities or facts to which they attest and can be depended upon in the course of subsequent transactions or activities. Integrity refers to ensuring that a record is complete and unaltered. Usability means that records can be located, retrieved, presented and interpreted. In order to have these characteristics, a record should be persistently linked to the metadata necessary to document a transaction. Metadata is "data describing context, content and structure of records and their management through time." Metadata ensure the creation and maintenance of authentic, reliable and usable records and the protection of the integrity of those records. It could be implemented by creating and capturing records management metadata in systems that create and manage records. There have been some projects and standard initiatives to identify a core set of records management metadata. Included are the Australian Recordkeeping Metadata Standard and the British Metadata Standard which is part of the Requirements for Electronic Records Management System. Recently ISO/TS 23081-1 is published to implement metadata requirements within the framework of ISO 15489. Public records management system in Korea is ruled by the Act on the Management of Archives by Public Agencies and Administrative Records Management Regulation. This article evaluates records and their descriptive elements captured and maintained by the records management system in Korea on the basis of the international metadata standards.

• Herbal Formula Science
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• v.27 no.3
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• pp.223-236
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• 2019

Dengropanax morfiferus (D), Broussonitia kazinoki (B), and Cudriania tricuspidata (E), a widely cultivated species in South Korea, has been used as traditional medicine to treat numerous diseases. In this study, we evaluated the antidiabetic effects in a various signaling mechanisms using mixed extract and major component contents were analyzed by HPLC in the combined extracts from Dengropanax morfiferus, Broussonitia kazinoki, and Cudriania tricuspidata (DBCE). DBCE inhibited ${\alpha}$-glucosidase and ${\alpha}$-amylase activation and showed potent antioxidant effects, which are evaluated using DPPH, ABTS, and SOD assay. Cytokines, which are released by inflammatory cells in pancreatic islets, are involved in the pathogenesis of type 1 diabetes mellitus. DBCE showed the protective effects in RINm5F cells against cytokines-induced damage by suppressing inducible nitric oxide (NO) synthase and COX-2 expression and NO production. Insulin resistance is the primary characteristic of type 2 diabetes. Therefore, the regulatory effect of DBCE on glucose uptake and production are investigated in insulin-responsive human HepG2 cells. DBCE stimulated glucose uptake, prevented Glut2 and phosphor-IRS1 downregulation induced by high glucose (HG, 30 mM). Moreover, DBCE pretreatment diminished glucose levels, PEPCK and G6Pase overexpression provoked by HG. These findings suggest that DBCE might be used for diabetes treatment through alpha-glucosidase or alpha-amylase activity regulation, pancreatic beta cell protection, hepatic glucose sensitivity improvement. Cytokines, which are released by inflammatory cells' infiltrations around the pancreatic islets, are involved in the pathogenesis of type 1 diabetes mellitus.

• Korean Journal of Pharmacognosy
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• v.50 no.2
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• pp.148-153
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• 2019

The lignan compound of Schisandra chinensis Baill. (Schizandraceae) has been reported to have a variety of biological activities such as liver protection, neuroprotection, anti-oxidant and anti-diabetes. In this study, we investigated a quantitative analytical method for schisandrin, gomisin A and gomisin $M_2$ isolated from S. chinensis by high-performance liquid chromatography-ultraviolet spectroscopy (HPLC-UV). The isolated compounds were identified by the analysis of 1H- and 13C-NMR spectroscopic data. The results showed that calibration curves of three compounds indicated great linearity with a correlation coefficient ($R^2$) of schisandrin 0.9983, gomisin A 0.9982 and gomisin $M_2$ 0.9986. The limits of detection (LOD) of schisandrin, gomisin A and gomisin $M_2$ were 0.14, 0.07 and $0.05{\mu}g/ml$ and the limits of quantification (LOQ) were 0.42, 0.22 and $0.14{\mu}g/ml$. Intra-day and inter-day precisions of schisandrin were 0.40~1.44%, 0.07~1.02% gomsin A were 0.22~0.52%, 0.10~0.63%, gomisin $M_2$ were 0.40~0.99%, 0.81~2.88%. In result, contents of schisandrin, gomisin A and gomisin $M_2$ in ethanol extract of S. chinensis were $25.95{\pm}0.15$, $2.51{\pm}0.02$ and $2.17{\pm}0.07mg/g$.

• The Korean Journal of Food And Nutrition
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• v.32 no.1
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• pp.33-40
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• 2019

The purpose of this study was to evaluate the antioxidant and hepatocyte protective effects of guava (Psidium guajava L.) leaves cultivated in Korea. The contents of the total polyphenol of the extract was 271.57 mg gallic acid equivalent (GAE)/g residue. Antioxidant activities of leaf extract were evaluated by examining the free radical scavenging ability. 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and ${\alpha}-{\alpha}$-diphenyl-${\beta}$-picrylhydrazyl (DPPH) free radical scavenging activities of the extract were 1133.23 mg trolox equivalent antioxidant capacity (TEAC)/g residue and 721.68 mg TEAC/g residue, respectively. The hepatocyte protective effect of guava leaf extract was examined in HepG2 cells. Against tert-butyl hydroperoxide (TBHP), the viability of HepG2 cells were increased by the treatment of leaf extract. In addition, guava leaf extract led to the inhibition of reactive oxygen species (ROS) generated in HepG2 cells. The leaf extract increased the activity of glutathione (GSH), glutathione reductase (GR), and glutathione peroxidase (GPx) against oxidative stress. These results suggested that guava leaves might be regarded as a potential source natural antioxidant and a hepatoprotective material.

• Quality Improvement in Health Care
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• v.27 no.1
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• pp.58-69
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• 2021

Purpose:In this study, we reviewed existing victim support programs implemented in Korea to aid in the development of psychosocial support programs for patients and guardians who have experienced patient safety incidents. Methods: We reviewed similar programs: a support program for suicide survivors operated by the Korea Psychological Autopsy Center (Korea Foundation for Suicide Prevention), a family harmony program for workers in industrial accidents operated by the National Center for Forest Therapy, and the support services for crime victims provided by the Korean Crime Victims Support Association. We reviewed the contents of each website and conducted interviews with key personnel from each institution. Results: The support program for families who have experienced suicide was developed based on the suicide prevention project at the Central Psychological Autopsy Center. The family harmony program for workers who suffered industrial accidents is operated by the National Center for Forest Therapy at the behest of the Korean Workers' Compensation and Welfare Service. The Korean Crime Victims Support Association was established by the Ministry of Justice in accordance with the Crime Victim Protection Act and provides support to victims of crime. Each program was designed and implemented considering the objectives and goals, defining their recruitment plans as well as the selection criteria for their participants, and creating quality content that adequately addressed the struggles of their participants. Conclusion: The summarization of the various types of victim support programs in this study can be helpful in the future development of psychosocial support programs for victims of patient safety incidents.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.20 no.3
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• pp.53-65
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• 2010

Conditional Access System (CAS) is a core security mechanism of IPTV SCP (Service and Content Protection) which enables only authenticated user to be able to watch the broadcasting contents. In the past, it was general that CAS was built in Set-Top Box (STB) as hardware or as a detachable cable card. However, numerous researches in Downloadable CAS (DCAS), where users can download CAS code in their STB through their network, have been recently conducted widely due to the lack of security and scalability problem. In this paper, the security requirements of OpenCable based DCAS which is typical example of downloadable IPTV SCP will be derived, the novel authentication and key management scheme will be proposed by using the Authentication Proxy (AP) which is the core DCAS. Also, the benefits of the proposed system will be evaluated by comparison and analysis with preceding research.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.25 no.2
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• pp.234-239
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• 2021

Recently, as the installation of a large number of high-performance CCTVs for crime prevention and traffic control has increased rapidly, the problem of increasing system requirements for response to privacy infringement factors and analysis of high-definition image information transmitted from multiple cameras has been actively emerging. Accordingly, there is a need for a method for responding to privacy infringement and a method for efficiently processing surveillance images input from multiple cameras. In this paper, in order to reduce the processing cost of the input image and improve the processing speed, an integrated image is generated by grouping images input from a plurality of cameras. After analyzing the pre-generated integrated video, it detects a preset privacy event or an event that highlights interest. Depending on whether or not an event is detected, you will perform an editing operation corresponding to the event.

• Journal of the Korea Society of Computer and Information
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• v.26 no.11
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• pp.233-236
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• 2021

Recently, the Justice Party is pushing for legislation of a bill called the Algorithm Transparency Act. The bill is a revision to the Information and Communication Network Act proposed by Rep. Ryu Ho-jung on June 25, 2021, and aims to form a separate committee under the Korea Communications Commission to ask organizations operated for profit to search algorithms and explain the principles of arrangement. Currently, Korea treats algorithms as corporate secrets and does not disclose them, while the European Union (EU) implements the Personal Information Protection Regulations (GDPR) in relation to algorithm regulations. Therefore, this study summarizes the main contents of the Algorithm Transparency Act currently proposed to the National Assembly and reviews the current status of algorithm-related laws and systems in the European Union (EU) and the improvement of algorithm transparency.