• Clinical and Experimental Vaccine Research
• /
• v.13 no.3
• /
• pp.225-231
• /
• 2024

Purpose: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) usually causes a mild disease in children and the most serious consequence is multisystem inflammatory syndrome in children (MIS-C). Currently, there are no data about the protective role of vaccination performed by parents on children regarding the development of MIS-C. The aim of our study is to establish whether parental vaccination is related to MIS-C and the protective value of SARS-CoV-2 vaccination performed by parents against the occurrence of MIS-C in their children. Materials and Methods: Our retrospective single center study included 124 patients aged 1 month to 18 years admitted to emergency department from April 2020 to March 2022 for coronavirus disease 2019 disease. Results: Parental vaccination was negatively correlated with the development of MIS-C: 4% of patients with both parents vaccinated developed MIS-C, while patients with no parent vaccinated to have developed MIS-C were 20%. Conclusion: Parental vaccination could be an important factor influencing the course of the disease and reduces the probability that a child would develop MIS-C by 83% if both parents vaccinated.

• Journal of Chest Surgery
• /
• v.57 no.5
• /
• pp.460-466
• /
• 2024

Background: Numerous studies have investigated methods of predicting postoperative pulmonary complications (PPCs) in lung cancer surgery, with chronic obstructive pulmonary disease (COPD) and low forced expiratory volume in 1 second (FEV₁) being recognized as risk factors. However, predicting complications in COPD patients with preserved FEV₁ poses challenges. This study considered various diffusing capacity of the lung for carbon monoxide (DL_CO) parameters as predictors of pulmonary complication risks in mild COPD patients undergoing lung resection. Methods: From January 2011 to December 2019, 2,798 patients undergoing segmentectomy or lobectomy for non-small cell lung cancer (NSCLC) were evaluated. Focusing on 709 mild COPD patients, excluding no COPD and moderate/severe cases, 3 models incorporating DL_CO, predicted postoperative DL_CO (ppoDL_CO), and DL_CO divided by the alveolar volume (DL_CO/VA) were created for logistic regression. The Akaike information criterion and Bayes information criterion were analyzed to assess model fit, with lower values considered more consistent with actual data. Results: Significantly higher proportions of men, current smokers, and patients who underwent an open approach were observed in the PPC group. In multivariable regression, male sex, an open approach, DL_CO <80%, ppoDL_CO <60%, and DL_CO/VA <80% significantly influenced PPC occurrence. The model using DL_CO/VA had the best fit. Conclusion: Different DL_CO parameters can predict PPCs in mild COPD patients after lung resection for NSCLC. The assessment of these factors using a multivariable logistic regression model suggested DL_CO/VA as the most valuable predictor.

• Journal of the Korean Institute of Intelligent Systems
• /
• v.25 no.2
• /
• pp.174-179
• /
• 2015

Failure Mode and Effects Analysis (FMEA) has been used by Dynamic Positioning (DP) system for risk and reliability analysis. However, there are limitations associated with its implementation in offshore project. 1) since the failure data measured from the SCADA system is missing or unreliable, assessments of Severity, Occurrence, Detection are based on expert's knowledge; 2) it is not easy for experts to precisely evaluate the three risk factors. The risk factors are often expressed in a linguistic way. 3) the relative importance among three risk factors are rarely even considered. To solve these problems and improve the effectiveness of the traditional FMEA, we suggest a Fuzzy-FMEA method for risk and failure mode analysis in Dynamic Positioning System of offshore. The information gathered from DP FMEA report and DP FMEA Proving Trials is expressed using fuzzy linguistic terms. The proposed method is applied to an offshore Dynamic Positioning system, and the results are compared with traditional FMEA.

• Journal of Food Hygiene and Safety
• /
• v.37 no.5
• /
• pp.347-355
• /
• 2022

Levels of beauvericin (BEA) and enniatins (ENNs: ENA, ENA1, ENB, and ENB1) were examined in fresh ginger (n = 43) and ginger powder (n = 31) samples from Korea. In the ginger samples, incidence of BEA contamination was highest, at 62.79%, with a maximum detected BEA level of 640.07 ㎍/kg. ENNs in were found in up to 11.63% (ENB, ENB1) of ginger samples, with a maximum detected level of 91.02 ㎍/kg (ENA). In the ginger powders, ENB contamination displayed the highest rate of incidence (70.97%), but the highest level of BEA (1,344.18 ㎍/kg) exceeded that of ENB (413.99 ㎍/kg). The incidences of ENA, ENA1, ENB, and ENB1 presence in ginger powders were 29.03%, 22.58%, 70.97%, and 35.48%, respectively, and their highest detected levels were 220.45, 156.61, 413.99, and 70.29 ㎍/kg, respectively. The incidence of BEA and ENN contamination was higher in ginger powder than in ginger. Respective co-occurrence rates of BEA and ENNs in ginger and ginger powder samples were 16.28% and 64.52%, indicating that the BEA and ENN co-contamination rate was highest in ginger powder as well. This is the first report on the presence and co-occurrence of BEA and ENNs in Korean ginger and ginger powder.

• Economic and Environmental Geology
• /
• v.55 no.4
• /
• pp.339-352
• /
• 2022

As environmental criteria items are increased or strengthened, cases of heavy metal contamination by geogenic origin are increasing, and the need to distinguish between natural and anthropogenic origins in soil or groundwater exceeding the standard is increasing. In this study, geochemical occurrences of geogenic heavy metals were identified through statistical processing of the national geochemical map data and evaluation of geochemical characteristics of regions with high geoaccumulation indices. Cobalt, Cr, Cu, Ni, Pb, V, and Zn were targeted for which the national geochemical maps were prepared, and Co, Cr, Ni, and V derived from ultrabasic or ultramafic rocks were classified as factor 1. Copper, Pb and Zn of non-ferrous sulfide origin were classified as factor 2. In particular, enrichment of heavy metals by factor 1 occurs mainly in the serpentine distribution areas of the Chungcheong region, and there is a risk of contamination in neighboring areas. In the case of factor 2, geogenic occurrence is concerned not only in non-ferrous metal mineralization areas such as Taebacksan and Gyeongnam mineralization zones, but also in Au-Ag mineralization areas distributed nationwide.

• Korean journal of applied entomology
• /
• v.61 no.4
• /
• pp.641-649
• /
• 2022

Leaf-rolling moths were collected from soybean fields and identified as Matsumuraeses falcana and Matsumuraeses phaseoli by comparison with laboratory-reared species based on the nucleotide sequence (658 bp) of the mitochondrial cytochrome c oxidase 1 subunit gene (COX1). Ten haplotypes with 0.15-0.46% genetic distance from each other in COX1 were found in 47 samples of M. falcana, in which haplotype A was dominant (approximately 70%). Only one type of COX1 was found in 30 samples of M. phaseoli, and its sequence showed 4.11-4.61% genetic distance from those of M. falcana. Amino acid sequences translated from COX1 were identical in all samples of both species, and they showed synonymous substitutions. Larvae of both species caused damage to soybean leaves and pods and co-occurred simultaneously in the field. The average density of M. falcana was 1.5 times higher than that of M. phaseoli. The results clearly indicate that soybean was the host plant for both species. In addition, Elodia flavipalpis (Diptera: Tachinidae) was found to be a larval parasitoid of Matsumuraeses sp. through identification of the COX1 gene.

• Journal of the Korean Society for information Management
• /
• v.39 no.1
• /
• pp.309-330
• /
• 2022

Intellectual structure analysis, which quantitatively identifies the structure, characteristics, and sub-domains of fields, has rapidly increased in recent years. Analysis techniques traditionally used to conduct intellectual structure analysis research include bibliographic coupling analysis, co-citation analysis, co-occurrence analysis, and author bibliographic coupling analysis. This study proposes a novel intellectual structure analysis method, Keyword Bibliographic Coupling Analysis (KBCA). The Keyword Bibliographic Coupling Analysis (KBCA) is a variation of the author bibliographic coupling analysis, which targets keywords instead of authors. It calculates the number of references shared by two keywords to the degree of coupling between the two keywords. A set of 1,366 articles in the field of 'Open Data' searched in the Web of Science were collected using the proposed KBCA technique. A total of 63 keywords that appeared more than 7 times, extracted from 1,366 article sets, were selected as core keywords in the open data field. The intellectual structure presented by the KBCA technique with 63 key keywords identified the main areas of open government and open science and 10 sub-areas. On the other hand, the intellectual structure network of co-occurrence word analysis was found to be insufficient in the overall structure and detailed domain structure. This result can be considered because the KBCA sufficiently measures the relationship between keywords using the degree of bibliographic coupling.

• Journal of Korean Society of Environmental Engineers
• /
• v.33 no.12
• /
• pp.900-906
• /
• 2011

To investigate concentration and sources of PCDD/Fs and Co-PCBs in sediments, total 52 sediment samples were measured at 17 sites in Geum River. As a result of analysis, total concentrations of PCDD/Fs and Co-PCBs were ranged from not detected (N.D.)~193.47 pg/g-d.w. (mean value: 84.52 pg/g-d.w) and 0.34~359.19 pg/g-d.w (mean value: 114.65 pg/g-d.w.) respectively. Also, toxic equivalent (TEQ) concentration of PCDD/Fs and Co-PCBs were ranged from N.D.~5.12 (mean value: 0.88) pg I-TEQ/g-d.w and N.D.~0.58 (mean value: 0.09) $WHO_{2005}$-TEQ pg/g-d.w. respectively. The upstream indicate the highest concentration and as it goes to the downstream, it has tendency to decrease. Higher chlorinated compounds were dominant in most of site which detected PCDD/Fs. Occurrence of Co-PCBs isomer patterns appear similar to each sampling site was found. The isomer patterns showed similar between sediment and PCB products. The principal component analysis also showed that the samples contained the characteristics of PCBs products.

• Korean Journal of Food Science and Technology
• /
• v.29 no.5
• /
• pp.1033-1037
• /
• 1997

The occurrence of mold growth due to moisture migration in a composite chocolate product filled with marshmallow during storage was investigated. The correlation between water activities and water contents of dark chocolate coating and filling marshmallow at $25^{\circ}C$ was well applied to Kuhn's equation. The marshmallow was found to be more hydrogroscopic than the chocolate. Since the moisture transferred from marshmallow to chocolate, the water activity of marshmallow decreased from 0.88 to 0.80 and that of chocolate increased from 0.22 to 0.76 at $25^{\circ}C$ for 30 days. This water activity, 0.76, can allow mold growth. A mold was isolated on the surface of a composite chocolate product at $25^{\circ}C$after 3 months and then was identified as Aspergillus repens. Growth experiments at varied water activities with A. repens were performed. When the water activity in a chocolate solid medium increased from 0.73 to 0.93, the occurrence time of mold growth decreased from 62 to 15 days. These results suggested that the occurrence of mold growth was due to the increased water activity of the chocolate resulting from the moisture transfer from filling marshmallow dark to chocolate coating.

• Korean journal of applied entomology
• /
• v.51 no.4
• /
• pp.405-410
• /
• 2012

This study is conducted to develop a new method of early occurrence monitoring for Aculops lycopersici Massee (Acari: Eriophyidae), a major pest in tomato. A. lycopersici causes damage to plants such as curling of leaflet edges, followed by leaflet bronzing. As feeding continues by the mites, the plant takes on a russeted, wilted appearance, eventually culminating in leaflet desiccation and finally plant death. Fruit damages in tomato were shown when the density of mites was very high. Also, A. lycopersici caused more damage to unripe fruits than ripe fruits. The time taken to detect A. lycopersici on green label sticker was 7.0 seconds, the shortest. Blue, orange and white label stickers took 17.1, 19.8 and 12.3 seconds respectively. The permeable microscope with side illumination was useful in observing A. lycopersici on label stickers. A. lycopersici began to occur in late-April and the density of the mites increased rapidly after mid-May. The density peaked in mid to late-June, and decreased after late-June. A. lycopersici was observed on lower stems 20 days after the release of mites and observed on higher stems 60 days after. The peaked densities were observed on stems 40 and 60 days after and on leaf 80 days after. The label sticker is enough to monitor early occurrence of A. lycopersici in tomato cultivation facilities.