Purpose: This study was aimed to analyze the research trends by investigating the nursing theories used in research articles in Journal of Korean Academy of Nursing for the last 10 years. Methods: Among the research articles published in the Journal of Korean Academy of Nursing for the past 10 years from 2010 to 2019, the research trends was analyzed by investigating the nursing theories used in the studies. Results: As the results of a survey of 847 papers published in the Journal of Korean Academy of Nursing from 2010 to 2019, 139 studies applied to the theory were extracted. As for the theory, one Grand Theory, Roy’s adaptation model, and 6 Middle Range Theories including Kolcaba’s comfort theory, Pender's health promotion model, King's goal attainment theory, Watson's human caring theory, Reed's self-transcendence theory, Mishel's uncertainty in illness theory. Conclusion: In nursing, more use of nursing theories in research is necessary in the future, not only in quantitative research methods but also in qualitative research.

Purpose: The purpose of this study was to understand the meaning and nature of the experiences of adult patients infected with HIV (Human Immunodeficiency Virus) when they were teens. Methods: To this end, we analyzed how the experience was interpreted in their daily lives and what its meaning was through the Interpretative Phenomenological Analysis (IPA), a new method of extensive qualitative research in the UK. Among the confirmed HIV infections in teenagers, three people who agreed to participate in the study were men in their 20s and 30s. Participants were interviewed in-depth to collect data and the data was analyzed and interpreted using IPA. Results: As the results, eight themes and 18 sub-themes were derived from meaningful statements through in-depth analysis, and these were categorized into 4 categories. The four categories included ‘shock and despair’, ‘realistic difficulties’, ‘barriers in relationships’, and ‘life transitions’. Conclusion: Adolescent infected persons had support from their families or surroundings, and this positively influenced on the recovery of infected persons. We discussed the implications of the understanding of HIV infection, changes in social perception, the need for correct sex education, and the experiences of teenagers infected with HIV, and suggested follow-up studies.

Background: Researchers have previously commenced examining the degree of concordance between parent proxy and child self-reports on health-related quality of life (HRQOL) of many disease and impairment populations. Objects: To explore the differences between parent proxy and child self-reports on the HRQOL using Korean version of KIDSCREEN-10 questionnaires for applying to elementary school children and their parents who participated for a school-based wellness program. Methods: The focus groups were recruited for a school-based wellness program by implementing the following wellness services: 1) referring to a screening session for detecting potential posture-related musculoskeletal problems and 2) recommending home exercise programs. Before a primary field testing for the program, two focus groups were formed with a group of 9 parents and their 9 elementary school children aged 8–10 years of age. The parent proxy and child self-report versions of KIDSCREEN-10 questionnaires were administered to both groups after completion of the wellness program. Item level Rasch rating scale analysis was applied to compute logit scales of KIDSCREEN-10 questionnaire. Intraclass correlation coefficients (ICCs) and scatterplot of item difficulty between two reports were analyzed. Results: For fit statistics of parent proxy report, all items except 4 items (i.e., psychological well-being, mood/emotions, self-perception, parent relation) were found to be acceptable. For fit statistics of child self-report, all items except 3 items (i.e., psychological well-being, autonomy and home life) were acceptable. The relationship between two reports using ICCs were ranging from weak to very strong at p = 0.05 (i.e, ICCs = 0.011 to 0.905). Scatterplot analysis between two reports showed a major disparity on self-perception item at 95% confidence intervals. Conclusion: Both item level analyses and ICC comparisons provided a disparity between parent proxy and child self-reports of the HRQOL on self-perception item after competing a school-based wellness program. Therapist should consider the item as part of the HRQOL assessment.

Vegetable oils are a rich source of bioactive substances. Phytosterols in those have been known for many years for their properties for reducing blood cholesterol levels, as well as their other beneficial health effects. Phytosterols are triterpenes that are important structural components of plant cell membranes just as cholesterol does in animal cell membranes. The aim of this study was to provide consumers with information about phytosterol contents in vegetable oils in Korea market. The contents of major phytosterols (campesterol, stigmasterol, β-sitosterol) in 50 vegetable oils of 10 kinds (perilla oil, peanut oil, avocado oil, olive oil, pine nut oil, sesame oil, canola oil, coconut oil, grape seed oil, and sunflower oil) were analyzed by gas chromatography with flame ionization detector. The average contents of vegetable oils containing 5 or more samples were in the order of sesame oil (334.43 mg/100 g), perilla oil (262.16 mg/100 g), grape seed oil (183.71 mg/100 g), and olive oil (68.68 mg/100 g). Phytosterol content of sesame oil and perilla oil was high among vegetable oils.

농약허용물질목록관리제도의 시행에 따라, 농약의 안전 사용이 더욱 중시되었다. 산림식용자원(임산물)은 소규모 재배 등의 이유로 등록된 농약의 수가 적어, 등록되지 않 은 농약이 많이 사용되고 있다. 이에 임산물에 대한 농약 사용 실태를 파악하고자, 산림식용자원 10종에 대한 잔류 농약 및 중금속 잔류 실태 조사를 하였다. 엽경채류인 두릅, 참죽나무, 음나무, 옻나무의 새순, 한약재인 두충, 가시오갈피의 수피, 열매류인 초피나무, 산초나무, 은행나무의 열매와 도토리를 대상으로 잔류농약과 중금속 잔류를 분석하였다. 검출 빈도는 두릅, 참죽나무, 음나무, 두충, 가시오갈피, 초피, 산초에서 각각 6.7, 13.3, 11.8, 13.3, 10.0, 46.768 및73.3%였으며, 옻나무, 은행, 도토리에서는 검출 되지 않았다. 검출된 잔류농약은 모두 미등록 농약 이였다. 중금속은 모든 시료에서 검출되지 않았다. 본 연구에 서 얻은 임산물별 사용농약에 대한 정보는 병해충 방제를 위한 농약 사용현황을 확인하여, 추후 농약등록을 위한 정보를 제공하므로 국내 임산물의 안전성 확인을 위한 자료로 활용할 가치가 있을 것이다.

In this study, AlSi10Mg powders with average diameters of 44 μm are additively manufactured into bulk samples using a selective laser melting (SLM) process. Post-heat treatment to reduce residual stress in the as-synthesized sample is performed at different temperatures. From the results of a tensile test, as the heat-treatment temperature increases from 270 to 320oC, strength decreases while elongation significantly increases up to 13% at 320oC. The microstructures and tensile properties of the two heat-treated samples at 290 and 320oC, respectively, are characterized and compared to those of the as-synthesized samples. Interestingly, the Si-rich phases that network in the as-synthesized state are discontinuously separated, and the size of the particle-shaped Si phases becomes large and spherical as the heat-treatment temperature increases. Due to these morphological changes of Si-rich phases, the reduction in tensile strengths and increase in elongations, respectively, can be obtained by the post-heat treatment process. These results provide fundamental information for the practical applications of AlSi10Mg parts fabricated by SLM.

In this study, AlSi10Mg alloy powders are synthesized using gas atomization and sieving processes for powder bed fusion (PBF) additive manufacturing. The effect of nozzle diameter (ø = 4.0, 4.5, 5.0 and 8.0 mm) on the gas atomization and sieving size on the properties of the prepared powder are investigated. As the nozzle diameter decreases, the size of the manufactured powder decreases, and the uniformity of the particle size distribution improves. Therefore, the ø 4.0 mm nozzle diameter yields powder with superior properties. Spherically shaped powders can be prepared at a scale suitable for the PBF process with a particle size distribution of 10–45 μm. The Hausner ratio value of the powder is measured to be 1.24. In addition, the yield fraction of the powder prepared in this study is 26.6%, which is higher than the previously reported value of 10–15%. These results indicate that the nozzle diameter and the post-sieve process simultaneously influence the shape of the prepared powder as well as the satellite powder on its surface.

We investigate 20 post-coronal mass ejection (CME) blobs formed in the post-CME current sheet (CS) that were observed by K-Cor on 2017 September 10. By visual inspection of the trajectories and projected speed variations of each blob, we nd that all blobs except one show irregular \zigzag" trajectories resembling transverse oscillatory motions along the CS, and have at least one oscillatory pattern in their instantaneous radial speeds. Their oscillation periods are ranging from 30 to 91 s and their speed amplitudes from 128 to 902 kms􀀀1. Among 19 blobs, 10 blobs have experienced at least two cycles of radial speed oscillations with dierent speed amplitudes and periods, while 9 blobs undergo one oscillation cycle. To examine whether or not the apparent speed oscillations can be explained by vortex shedding, we estimate the quantitative parameter of vortex shedding, the Strouhal number, by using the observed lateral widths, linear speeds, and oscillation periods of the blobs. We then compare our estimates with theoretical and experimental results from MHD simulations and uid dynamic experiments. We nd that the observed Strouhal numbers range from 0.2 to 2.1, consistent with those (0.15{3.0) from uid dynamic experiments of blu spheres, while they are higher than those (0.15{0.25) from MHD simulations of cylindrical shapes. We thus nd that blobs formed in a post-CME CS undergo kinematic oscillations caused by uid dynamic vortex shedding. The vortex shedding is driven by the interaction of the outward-moving blob having a blu spherical shape with the background plasma in the post-CME CS.

The purpose of this study is to classify the types of decoration techniques used in women’s Chima and Jeogori in traditional Hanbok catalogs from 2010 to 2020, and to analyze the frequency of each type. The method of this study is as follows. This study first investigated the transition of modern Hanbok and decorative techniques by analyzing and classifying such work in previous studies. Based on this, the technique of decorating the Jeogori and Chima that appeared in the traditional Hanbok catalog of the study period was analyzed. The results of the study are as follows. In the case of Jeogori, in the first half of 2010, the decorative technique of a relatively large size was used, and the decorativeness tended to be strong. However, in the late 2010s, the number of decorative techniques used in Jeogori has decreased, and the size of the decorative technique has become smaller and more concise, leading to a tendency to understated decoration. In the case of Chima, techniques to express natural texture by processing threads or fabrics themselves were mainly used rather than techniques to add decoration to the surface, and techniques to express various surface texture tended to develop toward the late 2010s. The change in the decoration technique of Jeogori and Chima appears to be a combination of social, cultural, and economic factors such as a change in consumption culture and a reduction in the wedding market.

This study investigated the volatile flavor composition of essential oils extracted from Synurus deltoides (Arr.) Nakai. The essential oils extracted from the aerial parts of plants by the hydrodistillation extraction method were analyzed by gas chromatography (GC) and GC-mass spectrometry. Ninety-six (98.76%) volatile flavor compounds were identified in the essential oil extracted from fresh leaves of S. deltoides (Arr.) Nakai. The major compounds were 6,10,14-trimethyl-2-pentadecanone (19.91%) and phytol (12.38%). Ninety-seven (97.81%) volatile flavor compounds were identified in the essential oil extracted from shade-dried leaves of S. deltoides (Arr.) Nakai. The major compounds were phytol (51.71%), di(6-methylhept-2-yl) phthalate (7.66%), and 6,10,14-trimethyl-2- pentadecanone (4.23%). Quantitative variations of 6,10,14-trimethyl-2-pentadecanone, phytol and di(6-methylhept-2-yl) phthalate according to different state of S. deltoides (Arr.) Nakai can serve as a quality index of essential oils used in the food industry.