Jeju Province Research Articles

제주지역 무가온하우스에서 YN-26 (Citrus unshiu)의 생육 특성 조사

The purpose of this study is to investigate the growth and peel-puffiness characteristics of YN-26 (Citrus unshiu) cultivar grown at non-heated cultivation greenhouses in Jeju province. The bud bursted and full bloomed period of YN-26 was March 1st and April 15th, respectively. Color change of pericarp was began september 1st. The YN-26 was faster in growth and peel puffiness than comparative varity, Yura Wase (C. unshiu). Fruits qualities of non-heated cultivation greenhouse YN-26 was soluble solids content 12.0˚Bx and acidity 0.81%, Yura Wase was soluble solids content 11.0˚Bx and acidity 0.90%. Soluble solids content of YN-26 was higher and acidity was lower than Yura Wase. The fruit colorations faster in the high fruit ratio to the leaf. The fruit coloration was reached to about 60% the end of September. The peel puffing tended to become more severe as the coloration progressing. There was almost no peel puffing around September 21th, but it was started by the level of 1.0 to 2.7 from September 29th, and severely by above 6.0 at the end of October.

Real-time PCR biochip for on-site detection of Coxiella burnetii in ticks

BackgroundQ fever, a zoonosis caused by Coxiella burnetii, has adverse effects on public health. Ticks are vectors of C. burnetii and they contribute to the transmission of the pathogen. A tool for rapid, sensitive, and accurate detection of C. burnetii from ticks is important for the prevention of Q fever.MethodsUltra-rapid real-time PCR (UR-qPCR) as a chip-based real-time PCR system was developed for the detection of C. burnetii from ticks. The UR-qPCR system was established and evaluated for the rapidity, sensitivity, and specificity of C. burnetii detection.ResultsC. burnetii was detected using UR-qPCR from 5644 larval, nymphal, and adult ticks from 408 pools collected from livestock and epidemiologically linked environments in two provinces, Gangwon and Jeju, in Korea. Ticks from three species were identified; Haemaphysalis longicornis accounted for the highest number, present in 333 of 408 pools (81.62%), followed by Haemaphysalis flava in 62 pools (15.19%) and Ixodes nipponensis in 13 pools (3.19%). The rapidity and sensitivity of PCR detection was demonstrated with the sufficient amplification and detection of approximately 56 copies of C. burnetii DNA with only 20 min of PCR amplification. The kappa value for the diagnostic agreement between UR-qPCR and stationary qPCR was in perfect agreement (κ = 1). PCR detection and sequencing indicated that C. burnetii was present in 5 of the 408 pools (1.23%), in which four pools contained H. longicornis and one pool contained H. flava. The infection rates of C. burnetii in the tick pools collected from Gangwon and Jeju Provinces were 1.70% and 0.58%, respectively. Phylogenetic analysis indicated a close relationship between the detected C. burnetii and those originating from goats, humans, and ticks in different countries, such as the USA, France, Germany, and Serbia.ConclusionsThe methods described in this study could be important for the prevention and control of Q fever in the two provinces. The UR-qPCR, with its features of mobility, sensitivity, and rapidity, is helpful for constructing early alert systems in the field for C. burnetii in ticks and could help alleviate the transmission of and economic damage due to Q fever.Graphical

Diversity in Phenological and Agronomic Traits of Miscanthus sinensis Collected in Korea and Eastern Asia

Four-year field experiments were conducted to investigate phenotypic traits associated with the biomass yield of 173 Miscanthus sinensis accessions collected from Korea and neighboring East Asian countries. Nine phenological and agronomic traits associated with biomass yield were assessed to investigate their phenotypic diversity and relationships with biomass yield as well as the latitudes of the M. sinensis accessions collection sites. Correlation analyses among phenological and agronomic traits, biomass yield, and collection site revealed that heading date, vegetative growth duration, leaf area, and stem growth traits (stem height, stem diameter, and stem dry weight) were closely related to biomass yield. The latitude of collection site exhibited a significant negative correlation with heading date, and heading date showed a significant positive correlation with biomass yield, indicating the high biomass potential of the accessions originating from lower latitude due to longer vegetative growth. The best biomass yield was mainly observed in M. sinensis accessions from the southern parts of Korea, such as Jeolla and Jeju provinces, with over 20 Mg DM ha−1. Agronomic traits measured in the second year after planting also showed a high correlation with biomass yield measured in the fourth year after planting. In particular, vegetative growth duration, leaf area, stem diameter, and stem dry weight measured in the second year were significantly related to the fourth-year biomass yield. Therefore, these findings suggest that agronomic traits measured in the second year can be used for screening M. sinensis genetic resources and breeding lines with high biomass yield potential.

A Survey on Relatedness between Creation of Urban Parks and Services of Public Servants from Green Space Department(PSGSD)

Purpose: The purpose of this study is to conduct a survey on the service performance rate of creation of ur-ban parks so that the problems in local governments arising out of that service by the public servants from oth-er department than the ones from green space department will be solved. Method: In this study, we conducted a survey on local government in the nation over the performance rate of the public servants from green space department(the “PSGSD”) for the stages of urban park duties: making decisions on creation of urban park; establishment of park creation plan; carrying out construction of park; and park management. Result: In the stage of making decisions of urban park creation, the work performance rate of public ser-vants from green space department in all the local government of the nation is 0% and it is analyzed that no PSGSD has performed the duties to make those decisions. In analyzing average work performance rate of PSGSD for the duties of park creation plan, construction of park creation, and park management out of the du-ties of urban park creation by local governments, while the average work performance rate of public servants from green space department in Seoul, Jeju Province and other 5 metropolitan cities except for Sejong Special Self-governing city and Gwangju metropolitan city is 100%, the one in Gyeongsangbuk province is 27.8%, the lowest one. Conclusion: Through this study, we can identify the work system of PSGSD the work performance rate of the duties of urban park creation by local governments in the nation. In addition, in this study, we suggest policy plan making the public servants other than PSGSD to carry out the duties of urban park creation so that this study may be utilized as a material of ground for enhancing PSGSD’s work performance rate for the duties of urban park creation.

Knowledge, Performance, and Educational Needs of Infection Control among Nurses in Long-term Care Hospitals: A Focus on Jeju Province

Knowledge, Performance, and Educational Needs of Infection Control among Nurses in Long-term Care Hospitals: A Focus on Jeju Province

Peer-to-Peer Energy Trading Mechanism Based on Blockchain and Machine Learning for Sustainable Electrical Power Supply in Smart Grid

It is expected that peer to peer energy trading will constitute a significant share of research in upcoming generation power systems due to the rising demand of energy in smart microgrids. However, the on-demand use of energy is considered a big challenge to achieve the optimal cost for households. This paper proposes a blockchain-based predictive energy trading platform to provide real-time support, day-ahead controlling, and generation scheduling of distributed energy resources. The proposed blockchain-based platform consists of two modules; blockchain-based energy trading and smart contract enabled predictive analytics modules. The blockchain module allows peers with real-time energy consumption monitoring, easy energy trading control, reward model, and unchangeable energy trading transaction logs. The smart contract enabled predictive analytics module aims to build a prediction model based on historical energy consumption data to predict short-term energy consumption. This paper uses real energy consumption data acquired from the Jeju province energy department, the Republic of Korea. This study aims to achieve optimal power flow and energy crowdsourcing, supporting energy trading among the consumer and prosumer. Energy trading is based on day-ahead, real-time control, and scheduling of distributed energy resources to meet the smart grid’s load demand. Moreover, we use data mining techniques to perform time-series analysis to extract and analyze underlying patterns from the historical energy consumption data. The time-series analysis supports energy management to devise better future decisions to plan and manage energy resources effectively. To evaluate the proposed predictive model’s performance, we have used several statistical measures, such as mean square error and root mean square error on various machine learning models, namely recurrent neural networks and alike. Moreover, we also evaluate the blockchain platform’s effectiveness through hyperledger calliper in terms of latency, throughput, and resource utilization. Based on the experimental results, the proposed model is effectively used for energy crowdsourcing between the prosumer and consumer to attain service quality.

제주도 기후변화 적응계획 수립과 이행의 한계 요인

기후위기가 심각해지면서 적응이 갈수록 중요해지고 있다. 적응은 지역을 기반으로 접근해야 하지만 지역 기반적응을 가로막거나 힘들게 하는 장애 요소에 대한 논의는 부족한 실정이다. 이 연구에서는 우리나라 17개 광역자치단체 중 유일한 특별자치도인 제주도가 기후변화 적응계획을 수립하고 이행하는 데 있어서 마주하는 한계 요인을 살펴보았다. 선행연구 검토를 통해 한계 요인을 크게 ‘정보 수집과 현황 조사’, ‘적응 계획 수립’, ‘적응 계획 이행’ 3가지로 나누어 살펴본 결과, 예산부족, 성과주의, 인식 부족 등의 요인을 발견할 수 있었다. 기후위기에 대한 지역단위의 적응 역량을 구축하고 강화해나가기 위해서는 이 연구에서 발견한 한계 요인들을 지속적으로 보완해 나가야 할 것이다.

Status of National Notifiable Infectious Diseases in Jeju Province, Korea: 2001-2019

Status of National Notifiable Infectious Diseases in Jeju Province, Korea: 2001-2019

An Exploratory Study on Development for Sustainable Community Enterprise in Jeju

Purpose: There have been 1,592 community enterprises(CEs) as of June, 2019 in nationwide since the first case started in 2010 as 184 CEs were designated by the government. However, the majority of CEs has been in management risk due to low investment money and technological capability compared with private companies. Therefore, the purposes of this study were to identify the current situations regarding CEs and to provide managerial implications for securing sustainability and quality growth. Research design, data, and methodology: This study basically went through an exploratory methodology. The study mainly used the secondary data for literature reviews including background, concept, previous studies about development of CEs, and also collected the primary data with interview for some CEs in Jeju from August 2019 to June 2020. Results: There have been 1,592 CEs in nationwide in 2019 since 2010. The largest type was food area including 689 general foods and 224 traditional foods. Diverse areas were recommended including café, child care, financial services, leisure sports, transportation services, library, and teen-ager services such as England. The total of 37 CEs have registered in Jeju since 2010 starting two CEs. 41% was food area but 12 CEs have closed temporarily and 2 have closed completely. Like other regions, diversification of CEs was necessary. In addition, efforts should be made to diversify the types of village enterprises, as in the case of Britain and other countries, which are the origin of village enterprises. Conclusion: First, the re-organization of system relating CEs has needed such as unification of the concept of the ordinance. Second, diversification of CEs has been recommended to promote various types of businesses. Finally, supporting system has needed to re-organize such as implementation of CEs business by JPDC (Jeju Province Development Corporation; local public corporation) and JDC(Jeju Development Center; state-run corporation). Furthermore, in order to increase the value of this research, it is necessary to develop indicators that can guarantee the sustainability of CB through expert surveys(Delphi, FGI, AHP etc.) and make suggestions so that they can come up with support methods and systems suitable for the characteristics of Jeju according to the indicators.

Occurrence of the White Soybean Cyst Nematode, Heterodera sojae, and the Soybean Cyst Nematode, H. glycines, in Korea.

Soybean cyst nematode (Heterodera glycines, SCN) is the most harmful pathogen of soybean (Glycine max (L.) Merr.) worldwide. In 2016, a new soybean-parasitic cyst nematode, Heterodera sojae (the white soybean cyst nematode) was found parasitizing the roots of soybean plants in Korea. To investigate the distribution and population density of H. sojae, 943 soil samples were collected from soybean fields in all nine provinces in Korea in 2017 to 2018. Cyst nematodes were detected in 343 samples (36.4%) from eight of the nine provinces, except the island of Jeju province. Among the 343 samples, H. glycines was found in 227 samples (66.2%), H. sojae in 95 samples (27.7%), and 21 samples (6.1%) were infested with both H. sojae and H. glycines. Wide distribution of H. sojae in soybean fields indicates that H. sojae is an important cyst nematode species parasitizing soybean together with H. glycines.

Large-scale identification of human bone remains via SNP microarray analysis with reference SNP database

Single nucleotide polymorphisms (SNPs) are valuable markers complementary to conventional forensic short tandem repeat (STR) markers in genetic typing, with potential advantages in challenging forensic casework. With the advent of high-throughput technologies, such as microarrays and massively parallel sequencing, the use of SNP typing has now expanded to large-scale forensic applications. Herein, a forensic case is presented to demonstrate the usefulness of SNP typing in identifying large-scale human bone remains with reference database construction. A total of 402 bone remains were recovered from an island in the Jeju Province of Korea where a massive disaster occurred in 1948. The first phase of the identification process was accomplished via conventional DNA typing methods including autosomal and Y-chromosomal STR typing, and mitochondrial DNA sequencing, which resulted in the identification of 74 of 402 remains. The second phase of the identification involved the remaining 327 unidentified remains using SNP typing as a supplementary tool based on Affymetrix resequencing array. The SNP markers of 782 family members were also analyzed and a reference database was constructed for comparison. An additional 51 bone remains were identified in the second phase. SNP data obtained from the supplementary genotyping yielded additional genetic information as well as contributed to kinship testing to determine the second degrees of relationship. In addition SNPs are useful in discriminating ambiguous relationship when only STR data are available. A software program developed for SNP typing system enabled efficient kinship analysis for large-scale forensic identification. The results and the casework are described and discussed.

Oral health attitudes and practices among college students in Jeju province

Oral health attitudes and practices among college students in Jeju province

Recent trends in seroprevalence of rubella in Korean women of childbearing age: a cross-sectional study

ObjectivesThe aim of this study was to investigate the immunity against rubella using the serological status of rubella-specific IgG antibodies (antirubella IgG) in Korean women of childbearing age (15–49 years).DesignRetrospective...

Time Series Analysis for Incidence of Scarlet Fever in Children in Jeju Province, Korea, 2002-2016

Time Series Analysis for Incidence of Scarlet Fever in Children in Jeju Province, Korea, 2002-2016

Parasitic infections and medical expenses according to Health Insurance Review Assessment claims data in South Korea, 2011-2018.

IntroductionIn South Korea, Health Insurance Review and Assessment claims data contain comprehensive information on healthcare services for almost the entire population. The present study used claims data on parasitic diseases from 2011 to 2018, and associated medical expenses to investigate infection trends associated with endemic parasitic diseases in South Korea, including those not monitored by Korea Centers for Disease Control and Prevention.MethodsBasic data regarding each parasitic disease were curated from the Healthcare Bigdata Hub (http://opendata.hira.or.kr). Ten endemic parasitic diseases, three pandemic protozoan diseases, and three ectoparasitic diseases were evaluated between 2011 and 2018. Data on each parasitic disease included the number of patients of each sex, age range within 5 years, province, and total medical expenses. Heatmap and principal component analysis were performed to visualize the incidence pattern of parasitic diseases by provinces.ResultsClonorchiasis and pinworm infections decreased remarkably from 6,097 and 4,018 infections in 2011 to 3,008 and 1,988 infections in 2018, respectively. Other endemic parasitic diseases mostly declined or remained steady over the 8-year period, except for anisakiasis, which doubled from 409 in 2011 to 818 in 2018. Provinces close to North Korea had a higher frequency of claims for Plasmodium vivax infection. The highest rate of clonorchiasis was in Gyeongsangnam-do, while that of anisakiasis was in southern Korea. Jeju province had the highest number of claims for cysticercosis, anisakiasis, pinworm infection, and soil-transmitted helminth infections. The total medical expense for anisakiasis was 65 million Korean won (57,000 US$) in 2011, rising to 237 million Korean won (206,000 US$) in 2018. The medical expense for trichomoniasis was 6,063 million won and for scabies was 1,669 million won in 2018. Since the claims data include only data reported by healthcare providers, some discrepancies might have occurred.ConclusionOur findings provide the basis for a health policy to reduce further infections and medical expense.

Epidemiological characteristics on new cases of notified tuberculosis in Jeju Province, Korea, 2011-2018

Epidemiological characteristics on new cases of notified tuberculosis in Jeju Province, Korea, 2011-2018

제주 생태관광 과정의 탄소 배출량 추정

Jeju, an island located at the southern part of the Korean Peninsula, is a tourist destination due to its abundant natural environment value from ecotourism. This study evaluates the carbon dioxide emissions from the process of Jeju ecotourism where an ecotourism trip is a product, and its start and end process is defined by the start and end of a trip. To estimate the amount of CO₂ emitted, statistics provided by Jeju province and relevant government agencies were taken into account. With the collected open data, the CO₂ emission from each transportation, accommodation and activity sector was estimated through methodologies provided by the Intergovernmental Panel on Climate Change(IPCC), and relevant research such as life cycle assessment. In summary, accommodation emits the highest amount of CO₂ during the trip process, at 235,939 ton CO₂ followed by 20,798.06 ton CO₂ for transportation and 4,178 ton CO₂ for ecotourism activity.

Contextual Factors by Supervisors in the links between Followership and Task Behavior

리더의 중요성은 다수의 리더십 연구에서 그 효과성이 대두되고 있으나, 리더와 상호작용하는 주요 대상인 팔로워들에 대한 관심도 요구되고 있다. 팔로워십은 조직에서 팔로워에 초점을 맞추는 개념으로 성향과 유형으로 접근하고 있으나, 본 연구에서는 팔로워십을 역량 측면으로 접근하여 팔로워십의 과업행동에 대한 영향력과 양자 관계를 조절하는 상황요인을 검증하고자 하였다. 양자관계에서 상황요인은 강화 및 완충 역할을 모두 반영하였으며, 강화 역할로 상사 코칭을 활용하고 완충 역할로 상사 조직정치지각을 설정하였다. 자료는 제주특별자치도에 소재하고 있는 중소기업 종사자로부터 수집된 263부를 활용하였다. 분석결과를 보면, 팔로워십은 과업행동에 긍정적인 역할을 하는 것으로 확인되었다. 팔로워십의 과업행동에 대한 영향력에 있어 상사 코칭은 팔로워십의 영향력을 강화시키는 상황요인으로 규명되었고, 상사 조직정치지각은 양자관계를 완충하는 것으로 확인되었다. 본 연구는 역량으로 접근하는 팔로워십의 중요성을 보여주는 계기를 제공하고 있고, 나아가 팔로워십이 효과적으로 발휘되기 위해서 요구되는 상사 차원의 특성에 관한 의미 있는 결과를 제공하고 있다.Despite of the significance of leadership effectiveness, the necessity for followers interacted with leaders are getting principal in modern organizations. Followership concentrated on follower has studied in the approaches of disposition and typology, but new approach based on follower competency has emerged in the recent studies. The aims of the present study were to test the effects of followership on task behavior in the aspect of follower competency, and to demonstrate contextual factors associated with supervisors in the links. Both contextual variables reflected a reinforcer and a buffering role. The research target was 263 employees who have worked at small & medium-sized companies in Jeju province. Followership was positively associated to task behavior. The moderating effects by supervisor coaching as a reinforcer and the perceived organizational politics of supervisors as a buffering factor were supported as predicted. The current study contributed to introduce the importance for followership based on competency. In addition, the significance for supervisor’s characters was empirically explained to exhibit the effectiveness of followership.

Prevalence and molecular characterization of novel recombinant enterovirus G isolates in Jeju Province of South Korea

Prevalence and molecular characterization of novel recombinant enterovirus G isolates in Jeju Province of South Korea

Trend of prevalence and incidence of systemic lupus erythematosus in South Korea, 2005 to 2015: a nationwide population-based study.

Background/AimsThe aim of this study was to evaluate the trend of incidence and prevalence of systemic lupus erythematosus (SLE) in South Korea from 2005 to 2015.MethodsFrom 2005 to 2015, individuals with SLE were identified from the National Health Insurance database, which records information on almost all Koreans. SLE was defined according to the International Classification of Diseases, 10th revision (ICD-10), code M32. The incidence was calculated per 100,000 person-years. The prevalence was calculated per 100,000 people and stratified by year, age group, sex, region, and income.ResultsThe annual prevalence of SLE increased slightly from 21.25/100,000 people in 2005 to 35.45/100,000 people in 2015. In contrast, the annual incidence of SLE decreased slightly from 5.42/100,000 person-years in 2005 to 3.6/100,000 person-years in 2015. The prevalence and incidence of SLE were 10- and 6-fold higher in women than in men, respectively. The peak age of prevalence and incidence was 30 to 39 years in 2005; in 2015, the peak age of prevalence was 30 to 49 years and of incidence was 20 to 49 years. Regional variation was observed in both incidence and prevalence of SLE. Jeju province showed the highest prevalence of SLE (44.54/100,000 person-years), and Gwangju province showed the highest incidence of SLE (6.98/100,000 person-years) in 2015. The income status did not affect the prevalence or incidence of SLE except in patients without income who received medical aid.ConclusionsThe incidence of SLE has declined, but the prevalence has increased in Korea in recent years. Peak age of SLE trend to right shift in Korea.