• 임상간호연구
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• 제28권3호
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• pp.242-250
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• 2022

Purpose: This study was conducted to evaluate the performance following the application of the pilot program for the education nurse system of the Ministry of Health and Welfare in a medical institution. Methods: This study was employed a non-homogeneous comparative group design by comparing new nurses who entered the medical institution after the pilot project from December 2019 to April 2020 with new nurses who entered before the pilot project during the same period. Satisfaction, academic achievement, job adaptation, personal turnover within one year, and patient safety incident rate were investigated as performance indicators. Results: After the pilot project, the overall satisfaction among new nurses, preceptors, and fellow nurses increased, but there were no significant changes in academic achievement and job adaptation in new nurses. The personal turnover rate decreased from 15.6% to 9.1%, and the patient safety incident rate also decreased from 26.3% to 15.7%. Also, the preceptor overtime also decreased from 3.67 to 0.66 hours. Conclusion: The performance of the pilot project for the education nurse system was related to improvements in satisfaction, turnover rate of new nurses, patient safety incident rate, and preceptor overtime. Above all long-term monitoring of each performance indicator is necessary through the continuation of the education nurse system of the Ministry of Health and Welfare.

• Nutrition Research and Practice
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• 제17권1호
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• pp.73-90
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• 2023

BACKGROUND/OBJECTIVES: Meat eaters face conflicts over meat consumption due to recent increasing demands for reduced-meat diets to promote human and environmental health. Attitudes toward consuming meat have been shown to be culture-specific. Thus, this study was performed to examine cultural differences in attitudes, beliefs, and patterns of meat consumption among meat eaters in a group homogeneous in terms of age and sex but with diverse ethnicities. SUBJECTS/METHODS: In this cross-sectional study conducted in New York City in 2014, 520 female meat eaters (Whites = 25%; Blacks = 20%; East Asians = 35%; Hispanics = 20%) aged 20-29 completed a questionnaire consisting of a series of questions on meat consumption behaviors, which addressed amounts of consumption, cooking methods, past and future changes in meat consumption, and attitudes and beliefs regarding relationships between health and meat consumption. Logistic and multiple regression analyses were used to assess the effects of variables on meat consumption. RESULTS: Blacks had the highest annual total meat consumption (64.2 kg), followed by East Asians (53.6 kg), Whites (46.9 kg), and Hispanics (35.8 kg). Blacks ate significantly more chicken than the other ethnic groups (P < 0.001), and East Asians ate significantly more pork and processed meat (P < 0.001). Regardless of ethnicity, grilling/roasting/broiling were the preferred cooking methods, and vegetables were most consumed as a side dish. More than half of the participants expressed an intention to decrease future meat consumption. East Asians more strongly perceived meat as a festive food (P < 0.001) and were less guilty about the slaughtering animals (P = 0.11) than other groups. No differences were found between the ethnic groups regarding negative attitudes to meat consumption. CONCLUSIONS: The results show that ethnicities differ in terms of attitudes, beliefs, and patterns of meat consumption. Irrespective of ethnicity, the meat-eating participants almost unanimously demonstrated a willingness to reduce future meat consumption. It is hoped these findings aid the formulation of culturally-tailored interventions that effectively reduce meat consumption.

• Restorative Dentistry and Endodontics
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• 제46권1호
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• pp.3.1-3.14
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• 2021

Objectives: This study aimed to evaluate the interface between a calcium silicate cement (CSC), Biodentine and dental adhesives in terms of sealing ability. Materials and Methods: Microleakage test: 160 standardized class II cavities were prepared on 80 extracted human molars. The cavities were filled with Biodentine and then divided into 2 experimental groups according to the time of restoration: composite resin obturation 15 minutes after Biodentine handling (D0); restoration after 7 days (D7). Each group was then divided into 8 subgroups (n = 5) according to the adhesive system used: etch-and-rinse adhesive (Prime & Bond); self-etch adhesive 2 steps (Optibond XTR and Clearfil SE Bond); self-etch adhesive 1 step (Xeno III, G-aenial Bond, and Clearfil Tri-S Bond); and universal used as etch-and-rinse or self-etch (ScotchBond Universal ER or SE). After thermocycling, the teeth were immersed in a silver nitrate solution, stained, longitudinally sectioned, and the Biodentine/adhesive percolation was quantified. Scanning electron microscopic observations: Biodentine/adhesive interfaces were observed. Results: A tendency towards less microleakage was observed when Biodentine was etched (2.47%) and when restorations were done without delay (D0: 4.31%, D7: 6.78%), but this was not significant. The adhesives containing 10-methacryloyloxydecyl dihydrogen phosphate monomer showed the most stable results at both times studied. All Biodentine/adhesive interfaces were homogeneous and regular. Conclusions: The good sealing of the CSC/adhesive interface is not a function of the system adhesive family used or the cement maturation before restoration. Biodentine can be used as a dentine substitute.

• 사회복지연구
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• 제40권1호
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• pp.87-114
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• 2009

기존 소득불평등 관련 연구에서 여성은 '동질적인 집단'으로 간주되어 여성의 특성들이 보다 다양화되고 이질화되는 최근의 경향을 반영하고 있지 못한 한계를 갖고 있다. 이에 본 연구는 1997년부터 2005년까지 9년 간 여성의 소득불평등 추이와 원인을 규명하고자 하였다. 1997년 외환위기 이후 여성의 소득불평등도는 다소 감소하는 것으로 나타났으며 이러한 감소추이는 주로 중산계층 여성의 소득하락과 저소득층 여성의 소득증가에 기인하는 것으로 나타났다. 소득불평등의 원인으로는 학력 및 연령, 혼인상태 등이 미치는 상대적 영향력이 큰 것으로 분석되었다. 여성의 노동시장 참여율이 지속적으로 증가해 왔음에도 불구하고 여성 내 경제적 지위의 차이는 노동시장 특성보다 연령, 학력 등 개인적 특성과 혼인상태 등의 가구특성의 영향을 보다 많이 받는 것으로 나타났다.

• Restorative Dentistry and Endodontics
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• 제45권4호
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• pp.55.1-55.12
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• 2020

Objectives: This study investigated the effects of physically damaged and resin-contaminated tips on radiant emittance, comparing them with new undamaged, non-contaminated tips using 3 pieces of spectrophotometric laboratory equipment. Materials and Methods: Nine tips with damage and/or resin contaminants from actual clinical situations were compared with a new tip without damage or contamination (control group). The radiant emittance was recorded using 3 spectrophotometric methods: a laboratory-grade thermopile, a laboratory-grade integrating sphere, and a portable light collector (checkMARC). Results: A significant difference between the laboratory-grade thermopile and the laboratory-grade integrating sphere was found when the radiant emittance values of the control or damaged/contaminated tips were investigated (p < 0.05), but both methods were comparable to checkMARC (p > 0.05). Regardless of the method used to quantify the light output, the mean radiant emittance values of the damaged/contaminated tips were significantly lower than those of the control (p < 0.05). The beam profile of the damaged/contaminated tips was less homogeneous than that of the control. Conclusions: Damaged/contaminated tips can reduce the radiant emittance output and the homogeneity of the beam, which may affect the energy delivered to composite restorations. The checkMARC spectrophotometer device can be used in dental offices, as it provided values close to those produced by a laboratory-grade integrated sphere spectrophotometer. Dentists should assess the radiant emittance of their light-curing units to ensure optimal curing in photoactivated, resin-based materials.

• 생명과학회지
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• 제22권3호
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• pp.398-406
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• 2012

이 연구는 한국인에서 적용할 수 있는 근력관련 유전적 소인을 ACE 유전자와 ACTN3 유전자를 단일유전자 수준과 다중유전자 수준에서 관계성을 규명하는데 목적이 있다. 연구의 목적을 위해 근력운동종목의 엘리트선수 158명, 국가대표선수 106명, 대조군 676명을 동원하여 ACE ID 다형성과 ACTN3 R577X 다형성 분포를 분석했다. 연구결과, ACE 다형성에서 II 유전형 및 I 대립형질은 유의하게 높은 분포를 가졌고, 반면 DD 유전형 및 I 대립형 질은 유의하게 낮은 분포를 가졌다(Top-Class vs. Control: 41.4% vs. 32.1 for II genotype, 67.1% vs. 57.7% for I allele, p<0.05). ACTN3 다형성에서 RR 유전형 및 R 대립형질은 유의하게 높았고 XX 유전형 및 R 대립형질은 유의하게 낮았다(Top-Class vs. Control: 42.3% vs. 29.0 for RR genotype, 65.3% vs. 54.8% for R allele, p<0.05). 다중유전자 수준에서 근력은 ACE 다형성과 ACTN3 다형성이 조합된 우성조합유전형(II/ID+RR/RX)이 최우수 경기력에서 유의하게 높은 분포를 가졌다(Top-Class vs. Control: 82.9% vs. 66.7% for II/ID+RR/RX, p<0.05). 또한 최우수 경기력을 가진 국가대표는 엘리트와 대조군 보다 유의하게 높은 TGS를 가졌다($66{\pm}0.9$ vs. $58{\pm}1.9$ vs. $56{\pm}2.3$, p<0.05). 이를 근거로 우성조합유전형이 최우수 근력 경기력을 가질 가능성에 대한 승산비는 2.43배(CI:1.45-4.09, p<0.001)였다. 따라서 ACE 다형성과 ACTN3 다형성은 한국인에서 근력과 관계된 유전형으로 확인되었으며, 두 유전자는 상호 조합된 다중유전형에서 근력 경기력에 영향을 줄 것으로 사료된다. 또한 ACE 다형성과 ACTN3 다형성을 조합한 다중유전자는 근력 경기력을 예측할 수 있은 유전적 요인으로 사료되었다.

• Journal of Korean Neurosurgical Society
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• 제51권5호
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• pp.272-275
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• 2012

Objective : Choroid plexus papillomas (CPPs) are generally regarded as benign tumors with typical radiologic and pathologic findings. However, they sometimes have unusual findings. We have analyzed radiologic findings and pathologic growth patterns on CPPs. Methods : The study group included 5 male and 5 female patients (age range, 3 months to 58 years : median, 29 years). The study group included 3 pediatric and 7 adult patients. All patients underwent surgery; 9 patients had a gross total resection and 1 patient had a subtotal resection. We analyzed the radiologic findings (location, size, mottle-like appearance, enhancement, calcifications, and hydrocephalus) and pathologic growth patterns (typical papillary, papillary and solid, and papillary and tubular). Results : The median follow-up duration was 21.3 months (range, 4-47.8 months). There were no recurrences after initial treatment. All patients had benign CPPs. Pediatric CPPs were 3.2 cm masses (range, 2.7-4 cm) with homogeneous enhancement and a mottle-like appearance, which pathologically showed the papillary growth pattern. Hydrocephalus was present in all pediatric patients. Postoperatively, subdural hygroma had occurred in two patients. In adults, CPPs were located in the fourth ventricle in 6 patients and suprasellar area in 1 patient. The size varied from 0.5-4.2 cm. Hydrocephalus and calcifications occurred in 3 and 4 patients, respectively. Three patients showed the heterogeneous enhancement without a mottle-like appearance and pathologically showed combined papillary and solid growth in 2 patients and papillary and tubular growth in one. Postoperatively, two patients with large masses had injuries of the brainstem and underwent shunt procedures for aggravation of hydrocephalus. Conclusion : CPPs may show unusual radiologic findings, which preoperatively give the difficulty to be differentiated from other tumors. CPPs with unusual radiologic findings showed the combined pathologic growth patterns.

• 폴리머
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• 제36권6호
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• pp.693-698
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• 2012

본 연구에서는 높은 분자량의 polylactide(PLA)를 중합하기 위하여 aluminum isopropyl oxide($Al(O-i-Pr)_3$)를 아민기로 표면 기능화된 실리카에 담지하고 이를 촉매로 이용하여 생성된 PLA의 중합특성을 확인하였다. 담지촉매는 먼저 실리카 표면을 아민기를 갖는 실란화합물로 기능화한 후 $Al(O-i-Pr)_3$을 in-situ 합성하였다. 기능기에 담지된 $Al(O-i-Pr)_3$는 MAO(methyl aluminoxane) 존재하에 중합활성을 보였다. $115^{\circ}C$에서는 표면 기능화된 아민기양이 증가할수록 전환율과 분자량이 증가하였고, $130^{\circ}C$에서는 표면 기능화된 아민기양이 증가할수록 전환율은 감소하였으나 분자량은 크게 증가하여 표면 기능화된 아민기양이 3.0 mmol일 경우 44000 g/mol로 가장 높은 분자량을 얻었다. GPC curve를 통해 $115^{\circ}C$ 중합온도에서는 분자량 분포곡선이 bimodal 형태에서 저분자량 부분이 크게 증가하여 shoulder 형태로 변화하였으며 $130^{\circ}C$에서는 GPC 단일피크를 보였다. 균일계 $Al(O-i-Pr)_3$ 촉매보다 아민기로 표면 기능화된 실리카에 담지된 $Al(O-i-Pr)_3$ 촉매가 더 높은 활성과 고분자량의 PLA를 합성할 수 있었다.

• 대한물리의학회지
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• 제9권1호
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• pp.45-53
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• 2014

PURPOSE: In this study, we tried to find out what kind of exercise was more effective in sleep disorder by comparing melatonin in blood after applying low intensity with high intensity exercise to sleep disordered rats induced by experiment. METHODS: We used male Sprague-Dawley rats which were 8weeks old and weighted 300g. They were supplied with water and food without any restriction. We kept the room temperature at $25^{\circ}C$ and controld the length of day and night in 12 hours blocks, respectively. We divided the rats 60 into 2 groups. To one group we applied low intensity exercise, and to the other we applied high intensity exercise for 15minutes per day over a period of 4 weeks. We extracted the blood from abdominal aorta before, after exercise, moved into EDTA tube, performed centrifugation. We decanted the serum $200{\mu}l$ from the blood into microcentrifuge tube by samples and moved into polypropylene culture tubes with micro pipette. We split enzyme solution $50{\mu}l$ into the tubes with melatonin direct kits and make them react at $37^{\circ}C$ for 2 hours. We split assay buffer $50{\mu}l$ into each tube and mixed melatonin tracer $50{\mu}l$ and melatonin antiserum $50{\mu}l$, respectively. After we made them react in room temperature, we decanted the superficial layer with a centrifuge and measured the activity for 1 minute by competitive method with ${\gamma}$-counter equipment. We draw a standard curve through logit-log graph with CPM(counts per minute) and counted the melatonin by B/B0. We conducted independent t-test to examine the homogeneous of melatonin value of before low-intensity and high-intensity exercise. We performed paired t-test to compare before and after low-intensity and high-intensity exercise, respectively. We carried out independent t-test to compare melatonin value after low-intensity and high-intensity exercise. Significance level was .05. RESULTS: The results were as follows; firstly melatonin was more increased in the group who was exposed to high intensity exercise when we compared before to after high and low intensity exercise, respectively. Secondly, high intensity exercise was more effective than low intensity exercise when we compared the two. CONCLUSION: In conclusion, secretion of melatonin which is the material of sleep improvement could be promoted by high intensity exercise. Low intensity exercise acted as a stress rather than improving sleep and had a negative effect on the secretion of melatonin because the melatonin was affected by stress.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 춘계학술대회 논문집
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• pp.341-343
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• 2006

The current spectral shape matching method (SSMM), developed by Ahn and Shanmugam (2004), relies on the assumption that the path radiance resulting from scattered photons due to air molecules and aerosols and possibly direct-reflected light from the air-sea interface is spatially homogeneous over the sub-scene of interest, enabling the retrieval of water-leaving radiances ($L_w$) from the satellite ocean color image data. This assumption remains valid for the clear atmospheric conditions, but when the distribution of aerosol loadings varies dramatically the above postulation of spatial homogeneity will be violated. In this study, we present the second version of SSMM which will take into account the horizontal variations of aerosol loading in the correction of atmospheric effects in SeaWiFS ocean color image data. The new version includes models for the correction of the effects of aerosols and Raleigh particles and a method fur computation of diffuse transmittance ($t_{os}$) as similar to SeaWiFS. We tested this method over the different optical environments and compared its effectiveness with the results of standard atmospheric correction (SAC) algorithm (Gordon and Wang, 1994) and those from in-situ observations. Findings revealed that the SAC algorithm appeared to distort the spectral shape of water-leaving radiance spectra in suspended sediments (SS) and algal bloom dominated-areas and frequently yielded underestimated or often negative values in the lower green and blue part of the electromagnetic spectrum. Retrieval of water-leaving radiances in coastal waters with very high sediments, for instance = > 8g $m^{-3}$, was not possible with the SAC algorithm. As the current SAC algorithm does not include models for the Asian aerosols, the water-leaving radiances over the aerosol-dominated areas could not be retrieved from the image and large errors often resulted from an inappropriate extrapolation of the estimated aerosol radiance from two IR bands to visible spectrum. In contrast to the above results, the new SSMM enabled accurate retrieval of water-leaving radiances in a various range of turbid waters with SS concentrations from 1 to 100 g $m^{-3}$ that closely matched with those from the in-situ observations. Regardless of the spectral band, the RMS error deviation was minimum of 0.003 and maximum of 0.46, in contrast with those of 0.26 and 0.81, respectively, for SAC algorithm. The new SSMM also remove all aerosol effects excluding areas for which the signal-to-noise ratio is much lower than the water signal.