• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.21 no.7
• /
• pp.331-341
• /
• 2020

This study examined the effects of an Experience Sharing Self-management Program (ESSP) on physiological indexes, knowledge, and self-management implementation among hypertension and diabetes patients in a primary public health center in G city. A quasi-experimental research was conducted with a non-equivalent control group pretest-posttest design. The experimental group (n=30) participated in a 12-week ESSP, and the control group (n=25) received only general services of a primary public health center between May 1 and October 31 in 2018. Data were analyzed with x2 test (Fisher's exact test), Mann-Whitney test, and Ranked ANCOVA using SPSS/WIN 22.0 program. The results showed significant differences in systolic blood pressure (F=14.56, p<.001), diastolic blood pressure (F=7.05, p=.012), knowledge (F=14.30, p=.001), self-management implementation (F=29.73, p<.001) of hypertension patients, knowledge (F=7.92, p=.010), and self-management implementation (F=4.54, p=.044) of diabetes patients between the two groups. Therefore, the ESSP was effective for reducing the blood pressure of hypertension patients and improving the knowledge and self-management implementation among hypertension and diabetes patients in a primary public health center.

• Journal of Korean Clinical Nursing Research
• /
• v.27 no.1
• /
• pp.66-76
• /
• 2021

Purpose: This descriptive study aimed to explore the performance, nurses' perception, and influencing contexts of intentional rounding (IR), and to identify the factors influencing the performance of IR. Methods: 498 questionnaire responses were collected from clinical nurses with more than six months of work experiences in general wards performing IR in a general hospital. Results: The mean scores of the performance, nurses' perception, and influencing contexts of IR were 3.81(±0.68), 3.46(±0.42), and 3.79(±0.51) out of 5.00, respectively. There were significant differences in performance (F=20.51, p<.001) and nurses' perception (F=4.96, p=.001) based on the work department. There were significant differences in the influencing contexts based on age (F=6.02, p=.003) and the length of clinical experience in the ward (F=3.36, p=.010). Performance and nurses' perception(r=.42, p<.001), performance and influencing contexts (r=.46, p<.001), and nurses' perception and influencing contexts (r=.58, p<.001) showed a statistically positive correlation. Work unit (F=10.45, p<.001), nurses' perception of the benefits to patients (F=-2.46, p=.014) and to nurses (F=4.34, p<.001), and influencing contexts at the individual (F=7.77, p<.001) and department levels (F=2.99, p=.003) were found to be significant factors on the performance of IR. Conclusion: It is necessary to support the education programs and active participation of nurses in their role as leaders to raise their awareness regarding the benefits of IR. Furthermore, there is a need to adapt the IR protocol according to the unique characteristics of each unit and evaluate the effectiveness.

• The Korean Journal of Food And Nutrition
• /
• v.32 no.2
• /
• pp.106-113
• /
• 2019

The objective of this study was to evaluate the effect of fermented Kalopanax pictus (KP-F) on macrophage activation and its effect as a competitive inhibitor of LPS and inhibitory effect on endotoxemia. The results showed that KP-F could activate macrophage in a dose-dependent manner, and KP-F was confirmed to act as a ligand for TLR4. Also, it was found that KP-F did not exhibit the same biotoxicity as LPS in intraperitoneal injection, and that it could suppress the neutrophil migration induced by LPS administration. In normal mice, the body weight, tissue weight, and amount of nitrite and pro-inflammatory cytokines in serum showed no significant changes with KP-F diet for 2 weeks, confirming that administration of KP-F in normal mice did not lead to over activation of immune response and biotoxicity. In the mouse model of endotoxemia induced by LPS and D-galactosamine(D-GalN) in sub-lethal dose, the diet of KP-F effectively inhibited the amount of nitrite and cytokines in the blood, and thus was found to be able to relieve the hepatic and kidney injury. In addition, in the endotoxemia mouse model induced by LPS and D-GalN of lethal dose, the survival rate was increased by KP-F diet in a dose-dependent manner.

• Membrane Journal
• /
• v.20 no.2
• /
• pp.159-168
• /
• 2010

In this study, high porous PVdF flat sheet membranes were prepared to obtain reinforced membrane support for polymer electrolyte membrane fuel cell. Nano-size laponite was randomly dispersed in the membranes to improve mechanical property which lowered by the high porosity. The morphology and porosity of prepared PVdF/Laponite composite membranes were examined using the SEM analysis and the weight method and all membranes showed over 60% porosity. The membrane thermal stability depending on the laponite contents in the composite membranes was evaluated by membrane heat shrinkage at $105^{\circ}C$ and $135^{\circ}C$. MD and TD heat shrinkage of the PVdF composite membrane containing 5 wt% laponite was 2~3% and 2~3.5% at $135^{\circ}C$, respectively. The mechanical strength was enhanced after incorporating laponite particles and 30% increase in the modulus compared to pure PVdF membrane was obtained.

• Journal of the Korean Applied Science and Technology
• /
• v.29 no.3
• /
• pp.450-458
• /
• 2012

In order to reduce the effects of greenhouse gas (GHG) emissions, the South Korean government has announced a special platform of technologies as part of an effort to minimize global climate change. To further this effort, the Korean government has pledged to increase low-carbon and carbon neutral resources for biofuel derived from biomass to replace fossil and to decrease levels of carbon dioxide. In general, second generation biofuel produced form woody biomass is expected to be an effective avenue for reducing fossil fuel consumption and greenhouse gas (GHG) emissions in road transport. It is important that under the new Korean initiative, pilot scale studies evolve practices to produce biomass-to-liquid (BTL) fuel. This study reports the quality characteristics of F-T(Fischer-Tropsch) diesel for production of BTL fuel. Synthetic F-Tdiesel fuel can be used in automotive diesel engines, pure or blended with automotive diesel, due to its similar physical properties to diesel. F-T diesel fuel was synthesized by Fischer-Tropsch (F-T) process with syngas($H_2$/CO), Fe basedcatalyst in low temperature condition($240^{\circ}C$). Synthetic F-T diesel with diesel compositions after distillation process is consisted of $C_{12}{\sim}C_{23+}$ mixture as a kerosine, diesel compositions of n-paraffin and iso-paraffin compounds. Synthetic F-T diesel investigated a very high cetane number, low aromatic composition and sulfur free level compared to automotive diesel. Synthetic F-T diesel also show The wear scar of synthetic F-T diesel show poor lubricity due to low content of sulfur and aromatic compounds compared to automotive diesel.

• The Korean Journal of Nuclear Medicine
• /
• v.30 no.4
• /
• pp.532-540
• /
• 1996

목적 : 종양세포의 증식을 평가하기 위해 radiofluorinated ethyluracil (FEU)과 deoxyadenosine analogue(FAD)를 합성하여 종양의 영상화를 시도하였다. 대상 및 방법 : 5-(2-Fluoroethyl)uracil ([$^{18}F$]FEU)은 2, 4-dimethoxy-5-(2-hydroxyethyl) pyrimidine을 $K^{18}F$와 처리한 후 HBr로 가수분해하여 얻었으며 Fluorodeoxyadenosine은 adenosine의 triacetylated analogue를 $K^{18}F$와 처리하여 얻었다. 생물학적 조직분포는 유방암 세포(13762 NF, 100,000 cells per rat, im)를 쥐에 접종한 후 0.5, 1, 2 및 4시간에 주요장기를 적출하여 %ID/g을 측정하고 자가방사영상은 방사성의약품 투여 45분 후에 얻었다. PET 영상은 VX-2 종양을 접종한 가토를 이용하여 얻었다. In vitro cell proliferation assay는 사람의 말초단핵구를 이용하였다. 결 과 : In vitro assay상 ([$^{18}F$]FEU는 세포증식시 DNA/RNA에 결합함을 시사하였다. ([$^{18}F$]FAD와 ([$^{18}F$]FEU의 종양/비종양 방사능 섭취비는 시간경과에 따라 증가하였으며 ([$^{18}F$]FAD와 ([$^{18}F$]FEU를 이용한 자가방사영상과 ([$^{18}F$]FEU를 이용한 PET 영상에서 종양을 잘 관찰할 수 있었다. 결 론 : ([$^{18}F$]FAD 및 ([$^{18}F$]FEU를 이용하여 종양세포의 증식을 PET 영상에서 평가할 수 있으리라 사료된다.

• Kyungpook Mathematical Journal
• /
• v.55 no.1
• /
• pp.157-168
• /
• 2015

In this paper, we prove that every f-biharmonic map from a complete Riemannian manifold into a Riemannian manifold with non-positive sectional curvature,satisfying some condition, is f-harmonic. Also we present some properties for the f-biharmonicity of submanifolds of $\mathbb{S}^n$, and we give the classification of f-biharmonic curves in 3-dimensional sphere.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
• /
• v.36 no.2
• /
• pp.197-202
• /
• 2023

Calcium fluoride (CaF₂) single crystal is applied to numerous industrial applications, especially for optical uses. To have excellent optical transmission properties, however, CaF₂ crystals should be carefully fabricated through liquid-phase crystal growth techniques. In this study, as one of the early stage research activities to grow CaF₂ crystals with a good transmittance at the ultraviolet wavelength range, computational thermodynamic models were provided to deepen the understanding of the crystal growing processes of CaF₂ under various conditions. To remove point defects and oxygen impurities in the grown CaF₂ crystals, the system was thermodynamically evaluated to get optimal process conditions. From the reviews of previous experimental studies, computational thermodynamic approaches were found to be an effective and powerful tool to understand the meaning of the crystal growth processes and to obtain optimal process conditions.

• Journal of Electrochemical Science and Technology
• /
• v.8 no.4
• /
• pp.338-343
• /
• 2017

Activated carbon has lower electrical conductivity and reliability than other carbonaceous materials because of the oxygen functional groups that form during the activation process. This problem can be overcome by doping the material with heteroatoms to reduce the number of oxygen functional groups. In the present study, N, F co-doped activated carbon (AC-NF) was successfully prepared by a microwave-assisted hydrothermal method, utilizing commercial activated carbon (AC-R) as the precursor and ammonium tetrafluoroborate as the single source for the co-doping of N and F. AC-NF showed improved electrical conductivity ($3.8\;S\;cm^{-1}$) with N and F contents of 0.6 and 0.1 at%, respectively. The introduction of N and F improved the performance of the pertinent supercapacitor: AC-NF exhibited an improved rate capability at current densities of $0.5-50mA\;cm^{-2}$. The rate capability was higher compared to that of raw activated carbon because N and F codoping increased the electrical conductivity of AC-NF. The developed method for the co-doping of N and F using a single source is cost-effective and yields AC-NF with excellent electrochemical properties; thus, it has promising applications in the commercialization of energy storage devices.

• Radiation Oncology Journal
• /
• v.30 no.4
• /
• pp.173-181
• /
• 2012

Purpose: To evaluate the prognostic value of preoperative neck lymph node (LN) assessment with $^{18}F$-fluorodeoxyglucose positron emission tomography ($^{18}F$-FDG PET), computed tomography (CT), and magnetic resonance imaging (MRI) in oral cavity squamous cell carcinoma (OSCC) patients with pathologically positive LN. Materials and Methods: In total, 47 OSCC patients with pathologically positive LN were retrospectively reviewed with preoperative $^{18}F$-FDG PET and CT/MRI. All patients underwent surgical resection, neck dissection and postoperative adjuvant radiotherapy and/or chemotherapy between March 2002 and October 2010. Histologic correlation was performed for findings of $^{18}F$-FDG PET and CT/MRI. Results: Thirty-six (76.6%) of 47 cases were correctly diagnosed with neck LN metastasis by $^{18}F$-FDG PET and 32 (68.1%) of 47 cases were correctly diagnosed by CT/MRI. Follow-up ranged from 20 to 114 months (median, 56 months). Clinically negative nodal status evaluated by $^{18}F$-FDG PET or CT/MRI revealed a trend toward better clinical outcomes in terms of overall survival, disease-free survival, local recurrence-free survival, regional nodal recurrence-free survival, and distant metastasis-free survival rates even though the trends were not statistically significant. However, there was no impact of neck node standardized uptake value ($SUV_{max}$) on clinical outcomes. Notably, $SUV_{max}$ showed significant correlation with tumor size in LN (p < 0.01, $R^2$ = 0.62). PET and CT/MRI status of LN also had significant correlation with the size of intranodal tumor deposit (p < 0.05, $R^2$ = 0.37 and p < 0.01, $R^2$ = 0.48, respectively). Conclusion: $^{18}F$-FDG PET and CT/MRI at the neck LNs might improve risk stratification in OSCC patients with pathologically positive neck LN in this study, even without significant prognostic value of $SUV_{max}$.