• 한국환경보건학회지
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• 제42권4호
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• pp.274-279
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• 2016

Objectives: We investigated bacterial diversity in the Han River water resource protection area in order to provide basic microbiological information on the drinking water safety of the Seoul metropolitan region. Methods: Samples were collected in the spring and winter, but not during the rainy season. Pyrosequencing, gene amplification, and extraction of nucleic acids were employed in this study. Results: In total, 57 and 48 operational taxonomic units were respectively analyzed in samples collected during spring and winter. Proteobacteria were predominant in all samples. The samples contained phylogenetically diverse bacterial communities, with eleven major phyla and 36 genera. Cyanobacteria were predominant in the spring samples, but not in the winter samples. The predominant species in the samples collected during both seasons belonged to the genus Aquamicrobium and Bradyrhizobium. Moreover, no pathogenic bacteria were detected in the samples. Conclusion: Proteobacteria were predominant in the samples from the Han River water source protection area. Cyanobacteria were more predominant in the spring samples than in the winter samples, but Aquamicrobium and Bradyrhizobium were predominant in both sampling seasons.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.252-253
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• 2011

Many errors are broken out when hydro power plants are operating connected to electric power system. To minimize ripple effects of accidents, a hydro power plant is separated by a circuit breaker consisting of each protection equipments. In this paper, I will analyze a cause of abnormal events of emergency stop and therefore I take measures and suggest solutions for similar cases.

• 한국한의학연구원논문집
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• 제16권2호
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• pp.83-90
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• 2010

Objective : The purpose of this study was to provide the information about Bojungikki-tang by domestic papers and theses. Method : Domestic papers related to Bojungikki-tang were reviewed and analyzed. These papers were classified by year, research method, experimental method, and subject. Result : The following results were obtained in this study. 1. The study of Bojungikki-tang started from 1984 and continued steadily. 2. The domestic papers about Bojungikki-tang were 47 volumes. Among them, there were 26 volumes since 2000. 3. Classified by research method from the year 2000, 20 experimental studies, 4 clinical experiments, and 2 documentary researches. 4. Classified by experimental method from the year 2000, 10 studies used mouse in vivo experiment and 4 studies used rat in vivo experiment and 6 studies used each cell in vitro experiment. 5. Classified by subject from the year 2000, papers related to immune enhancing effect, nerve and mental system, radiation protection effect, anti-allergy, anti-inflammatory, anti-cancer, remedy of diabetes, skin protection and so on. Conclusion : Many papers of experimental studies, clinical experiments and documentary researches related Bojungikki-tang are included in domestic journals. Bojungikki-tang is being researched variously in immune enhancing effect, nerve and mental system, radiation protection effect, anti-allergy, anti-inflammatory, anti-cancer, remedy of diabetes, skin protection and so on. However, more clinical studies on Bojungikki-tang are needed.

• Journal of Animal Science and Technology
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• 제64권3호
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• pp.500-514
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• 2022

The blood-epididymis barrier (BEB) forms a unique microenvironment that is crucial for the maturation, protection, transport, and storage of spermatozoa in the epididymis. To characterize the function of tight junctions (TJs), which are constitutive components of the BEB, we determined the expression and localization of TJ proteins such as zonula occludens (ZO)-1, 2, and 3, occludin, and claudin3 (Cldn3) during postnatal development in the goat epididymis. To assess the expression patterns of TJ proteins in immature (3 months of age) and mature (14 months of age) goat epididymides, two different experimental methods were used including immunofluorescence labeling and western blotting. We show that, ZO-1, 2, and 3, and occludin, were strictly expressed and localized to the TJs of the goat epididymis, whereas Cldn3 was present in basolateral membranes as well as TJs. All TJ proteins examined were more highly expressed in the immature epididymis compared to levels in mature tissue. In conclusion, our study indicates that at least five TJ proteins, namely ZO-1, ZO-2, ZO-3, occludin, and Cldn3, are present in TJs, and the expression strength and pattern of TJ proteins tend to be age dependent in the goat epididymis. Together, these data suggest that the distinct expression patterns of TJ proteins are essential for regulating components of the luminal contents in the epididymal epithelium and for forming adequate luminal conditions that are necessary for the maturation, protection, transport, and storage of spermatozoa in the goat epididymis.

• ETRI Journal
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• 제34권2호
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• pp.159-167
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• 2012

In this paper, a new distributed resource allocation algorithm is proposed to alleviate the cross-tier interference for orthogonal frequency division multiplexing access macrocell and femtocell overlay. Specifically, the resource allocation problem is modeled as a non-cooperative game. Based on game theory, we propose an iterative algorithm between subchannel and power allocation called distributed resource allocation which requires no coordination among the two-hierarchy networks. Finally, a macrocell link quality protection process is proposed to guarantee the macrocell UE's quality of service to avoid severe cross-tier interference from femtocells. Simulation results show that the proposed algorithm can achieve remarkable performance gains as compared to the pure waterfilling algorithm.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2010년도 학술발표회
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• pp.121-121
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• 2010

The water resources of the United States are increasingly at risk and the nation's water policy is in serious difficulty. Water resources protection laws primarily passed since 1950 often contradict water resources development laws passed before 1950. These contradictions complicate efficient and effective responses to the nation's water resources challenges including climate change, our aging infrastructures, changing population dynamics, drought, floods, wetlands and aquatic species loss, ecosystem restoration and many others. In addition, water law and policy determination, management and enforcement are so broadly distributed between, local, state and federal responsibilities that effective responses again are difficult. For example, at the national level alone, more than a dozen federal agencies have water resources responsibilities including resource development, resource assessment, and resource protection. They are presided over by six cabinet (Ministerial) departments, at least 13 congressional (parliamentarian) committees and 23 subcommittees, and are funded by five appropriations subcommittees. Lastly, good science and the public accountability associated with it are often overshadowed by political considerations at local, state and federal levels. The United States approach to solving water resources challenges is ad hoc - we address problems as they appear or as they merit political support rather than using good science to address our long term water resources needs.

• International Journal of Internet, Broadcasting and Communication
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• 제15권4호
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• pp.261-269
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• 2023

We propose to design a Holochain-based security and privacy protection system for resource-constrained IoT healthcare systems. Through analysis and performance evaluation, the proposed system confirmed that these characteristics operate effectively in the IoT healthcare environment. The system proposed in this paper consists of four main layers aimed at secure collection, transmission, storage, and processing of important medical data in IoT healthcare environments. The first PERCEPTION layer consists of various IoT devices, such as wearable devices, sensors, and other medical devices. These devices collect patient health data and pass it on to the network layer. The second network connectivity layer assigns an IP address to the collected data and ensures that the data is transmitted reliably over the network. Transmission takes place via standardized protocols, which ensures data reliability and availability. The third distributed cloud layer is a distributed data storage based on Holochain that stores important medical information collected from resource-limited IoT devices. This layer manages data integrity and access control, and allows users to share data securely. Finally, the fourth application layer provides useful information and services to end users, patients and healthcare professionals. The structuring and presentation of data and interaction between applications are managed at this layer. This structure aims to provide security, privacy, and resource efficiency suitable for IoT healthcare systems, in contrast to traditional centralized or blockchain-based systems. We design and propose a Holochain-based security and privacy protection system through a better IoT healthcare system.

• 가족자원경영과 정책
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• 제9권3호
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• pp.113-134
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• 2005

The study was first part of the research on development of consumer education program as social education program. The purpose of this study was to review social consumer education programs conducted by various organizations and to examine the consulting statistics from Korea Consumer Protection Board and Korea National Council of Consumer Organizations. In Consumer Protection Board, consumer education was operated mainly for both college students majored in consumer studies and public-sector workers. Outgoing education was provided mainly to the persons in industries and housewives. Other consumer organizations conducted consumer education using government funds. The organizations considered 'purchasing' and 'consumerism' most frequently as the topics for the education. 'Credit' and 'insurance' were another main concerns at the education. The consulting statistics showed that 'mobile communication', 'laundry service', 'health foods', and 'educational materials for foreign language' took the largest portion of the consumer consulting. Some implications were made for developing consumer education program as social education.

• 한국태양에너지학회 논문집
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• 제35권2호
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• pp.1-10
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• 2015

Promising onshore wind farm sites in Gangwon province of Korea were investigated in this study. Gangwon province was divided into twenty five simulation regions and a commercial program based on Reynolds averaged Navier-Stokes equation was used to find out wind resource maps of the regions. The national wind atlas with a period 2007-2009 developed by Korea institute of energy research was used as climatologies. The wind resource maps were combined to construct a wind resource map of Gangwon province with a horizontal spatial resolution of 100m. In addition to the wind resource, national environmental zoning map, distance from substation, residence and automobile road, Beakdudaegan mountain range, terrain slope, airport and military reservation district were considered to find out promising wind farm sites. A commercial wind farm design program was used to find out developable wind farm capacities in promising wind farm site with and without excluding environmental protection regions. The total wind farm capacities with and without excluding the protection regions were estimated to be 46MW and 598MW, respectively, when a 2MW commercial wind turbine was employed.

• 한국한의학연구원논문집
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• 제9권1호
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• pp.51-63
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• 2003

The international government committee is progressing their agreements about intellectual property protection of traditional knowledge(TK), gene resource(GR), folklore(FL) in WIPO. It is in the course of selection with precedence of TK, GR, FL in WlPO, focused on discussions about listing of TK documents, standardization of DB construction, sharing and profit distribution of GR. Their are disagreements between developed countries and underdeveloped countries about intellectual property protection agreements of TK, GR. The developed countries insist on using, the existing intellectual property protections, but the underdeveloped countries ask new ones on character of TK, GR, It causes intangible assets to be valuable trade properties in future world trade. We have to make national plans to face agreements about IP of TK, GR in WIPO with our own TK, GR. We must have a basic attitude about laying down these plans such as raising national economy, considering our TK, GR to be relics of mankind culture. In addition to these, it needs accurate analysis about agreements in WIPO, our TK, GR, scientific mechanical level and capital power.