Gangwon Provincial University

This study introduces a BERT-based framework integrating cultural variables (e.g., hierarchical titles, collectivist norms) to predict employee turnover through semantic analysis of South Korean job postings. We collected 10,000 job ads from major platforms, culturally annotated them, and utilized 2,932 enterprise employee records. After fine-tuning KoBERT, we developed an NLP-survival hybrid model achieving an F1-score of 0.89 (95% CI [0.86-0.92]), significantly outperforming CNN (F1=0.78) and Logistic Regression (F1=0.72) baselines. Cultural variables critically influence turnover: emphasizing "loyalty" reduced risk by 18%, while hierarchical terms increased it by 30%. Enterprises can optimize job ads (e.g., reducing hierarchical language by 30%) to mitigate turnover. Theoretically, we validate Transformers for non-Western cultural text analysis and propose a "Cultural Sensitivity Index" (CSI) for model optimization. Practically, HR teams can apply CSI to refine job postings and deploy the hybrid model for real-time risk monitoring.

This study describes the epidemiological characteristics of coronavirus disease 2019 (COVID-19) based on reported cases from long-term care facilities. As of April 20th, 2020, 3 long-term care facilities in a metropolitan area of South Korea had reported cases of COVID-19. These facilities’ employees were presumed to be the sources of infection. There were 2 nursing hospitals that did not report any additional cases. One nursing home had a total of 25 cases, with an attack rate of 51.4% (95% CI 35.6–67.0), and a fatality rate of 38.9% (95% CI 20.3–61.4) among residents. The results from this study suggest that early detection and maintenance of infection control minimizes the risk of rapid transmission.

본 연구는 염화니켈 노출에 따른 북방전복의 염화니켈 축적 농도, 생존율 및 탈락률, 조직학적 지표 변화에 대하여 알아보고자 하였다. 실험은 1개의 대조구와 5개의 니켈 노출구 (5.9, 8.8, 13.3, 20.0, 30.0 mg/L) 였다. 염화니켈에 노출된 북방전복의 체내 염화니켈 축적 농도는 모든 니켈 노출구에서 농도의 존적으로 증가하는 결과를 보였다. 생존률 및 탈락률은 대조구에 비해 니켈 노출구에서 농도의존적으로 나타났다. 북방전복의 발, 아가미, 간췌장의 조직학적 변화는 시간이 경과함에 따라 대조구보다 니켈 노출구에서 뚜렷하게 나타났다. This study was conducted to find out accumulated concentration of nickel, survival rate and falling rate, structural changes of abalone, Haliotis discus hannai exposed to nickel chloride. Experimental groups were composed of one control condition and five nickel chloride exposure conditions (5.9, 8.8, 13.3, 20.0, 30.0 mg/L). The accumulation of nickel in abalone was significantly increased all exposure group. Though the exposure groups had lower survival rate than the control group, higher falling rate than the control group. Histopathological changes in the foot, gill and hepatopancreas of abalone revealed obvious with exposure group than control group.

Four Korean native cattle (KNC) breeds—Hanwoo, Chikso, Heugu, and Jeju black—are entered in the Domestic Animal Diversity Information System of the United Nations Food and Agriculture Organization (FAO). The objective of this study was to assess the genetic diversity, phylogenetic relationships and population structure of these KNC breeds (n = 120) and exotic breeds (Holstein and Charolais, n = 56). Thirty microsatellite loci recommended by the International Society for Animal Genetics/FAO were genotyped. These genotypes were used to determine the allele frequencies, allelic richness, heterozygosity and polymorphism information content per locus and breed. Genetic diversity was lower in Heugu and Jeju black breeds. Phylogenetic analysis, Factorial Correspondence Analysis and genetic clustering grouped each breed in its own cluster, which supported the genetic uniqueness of the KNC breeds. These results will be useful for conservation and management of KNC breeds as animal genetic resources.

The effects of the variation degree of residual dispersion per span (RDPS) random variables on the compensation characteristics of the distorted signals in optical links with the dispersion management (DM) and the mid-way optical phase conjugator (OPC) are investigated in this paper. In order to obtain this goal, the effective launch power range and the effective net residual dispersion (NRD) range are induced as a function of the variation degree of RDPS random variables. We confirm that it is needed to select the RDPS random variables of the narrow deviation in each fiber spans for implementing the flexible optical links transmitting the relative higher launch power. Also, we confirmed that it is more advantageous to use postcompensation rather than precompensation for expanding the effective NRD range.

In this study, we carried out sequential soil washing to investigate removal and fractionation change of arsenic (As), copper (Cu), and lead (Pb) contaminated soil. Stepwise extraction enhanced the extractability of metals compared to a single extraction. EDTA and basic conditions increased the extraction of As, while Cu and Pb were extracted more by acidic condition and EDTA. Alternate application of EDTA and NaOH was most effective and extracted 76% of As, 73% of Cu, and 83% of Pb. Fractionation analysis shows that the iron/manganese (Fe/Mn) oxyhydroxide fraction decreased in all metals. Especially, EDTA significantly decreased the fractionation of metals bound to Fe/Mn oxyhydroxide because of strong complexation of Fe‐EDTA. Stepwise application of EDTA and NaOH can be used to simultaneously and significantly extract As, Cu, and Pb.