• Environmental Engineering Research
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• 제24권1호
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• pp.45-53
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• 2019

Water and soil properties in paddy fields subjected to organic and conventional farming were characterized over the rice cycle in South Korea. To achieve the goals of this study, we sampled and analyzed soil and water from 24 organic paddy plots and 11 conventional paddy plots in March, May, August, and October 2016. The results were analyzed using statistical analyses, including analysis of variance (ANOVA), cluster analysis, and principal component analysis. The ANOVA results showed that water content (WC), electrical conductivity (EC), organic matter (OM), and available phosphorus ($P_2O_5$) in soil varied significantly (p < 0.01) depending on the farming method. Higher OM, EC, and $P_2O_5$ of soil were observed in the conventional paddies than in the organic paddies. All soil properties, except pH and ammonium, depended on seasonal variation. Cluster analysis revealed that soil properties in May were distinctly separated from those in other seasons mainly due to basal fertilization. The principal component analysis distinguished the soil properties in different seasons, but such a distinction was not observed between the soil properties in organic and conventional paddies. Low contents of WC, OM, and total N were observed in March. High concentrations of nitrate and total P were observed in May, but these were low in August and October. The soils from October were also characterized by high concentrations of EC and $P_2O_5$. These results indicate that the sampling time for soil and water can significantly influence the evaluation of soil properties with different farming methods.

• 한국콘텐츠학회논문지
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• 제21권1호
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• pp.352-362
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• 2021

본 연구는 치위생과 학생들의 전공만족도, 우울감, 자아존중감이 대학생활스트레스에 미치는 영향을 파악하기 위해 실시하였다. 경남 소재 J대학에 재학 중인 치위생과 학생 227명을 대상으로 자기기입식 설문지로 설문조사하였다. 수집된 자료는 SPSS WIN 21을 이용하여 기술통계, t-test, ANOVA, 피어슨상관분석, 위계적 회귀분석을 실시하였다. 연구결과, 전공만족도 점수는 3.65±.59점, 우울감 점수는 1.74±.43점, 자아존중감 점수는 3.59±.70점, 대학생활 스트레스 점수는 1.50±.33점이었다. 대학생활 스트레스는 전공만족도, 자아존중감과는 부적상관이 있었으며, 우울감과는 정적상관이 있었다. 대학생활 스트레스에 영향을 미치는 요인은 학년, 소득, 전공만족도, 우울감이었다. 그 결과, 치위생과 학생들의 대학생활 스트레스를 최소화하기 위하여 우울을 예방하고 완화하며, 전공만족도를 높일 수 있는 교육방법과 프로그램 개발이 필요하다고 사료된다.

• 디지털융복합연구
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• 제20권2호
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• pp.479-486
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• 2022

본 연구는 일개 대학병원에 근무하는 간호사를 대상으로 내부마케팅, 조직의사소통 및 조직성과 정도를 확인하고 조직성과에 미치는 영향요인을 파악하고자 시도되었다. 구조화된 설문지를 이용하여 239명의 간호사로부터 일반적 특성, 내부마케팅, 조직의사소통 및 조직성과를 파악하였다. 자료분석은 IBM SPSS 21.0프로그램을 이용하여 기술통계, Indepented t-test, one-way ANOVA, 상관관계, 다중회귀분석을 하였다. 본 연구결과 내부마케팅 3.13±0.58점, 조직의사소통 3.23±0.48점, 조직성과 3.34±0.51점이었다. 조직성과는 내부마케팅, 조직의사소통과 양의 상관관계가 있었으며 내부마케팅과 조직의사소통이 조직성과를 61.0% 설명하였다. 따라서 간호사의 조직성과를 높이기 위해서 간호사 개인적 측면에서 동기부여할 수 있는 내부마케팅 전략이 필요하며 조직적 측면에서 다양한 의사소통 채널을 구축하는 융합적인 전략이 필요하다.

• Journal of Sport and Applied Science
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• 제7권1호
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• pp.21-29
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• 2023

Purpose: This study was to investigate the effects of isometric exercise on muscle activity and body balance ability in asymmetrical walkers. Research design, data, and methodology: Twenty gait asymmetry people were divided to unilateral exercise group (UG, n=10) and bilateral exercise group (BG, n=10). UG were performed unilateral exercise for 60 minutes, three times a week, and 16 weeks, and BG were performed one side and then the other side alternately for 60 minutes, three times a week, and 16 weeks. Muscle activity and body balance ability were measured before, after 4 and 16 weeks isometric exercise. Moreover, SI (symmetry index; SI) was calculated from the measured value of SL (step length). Statistical analyses were conducted using one-way ANOVA and two-way ANOVA with repeated measures, a paired t-test, and multiple comparisons according to Scheffe. Results: In the muscle activity, ST decreased significantly in short step length(S-SL) and BG of LS compared to before isometric exercise(p<.05), and GCM decreased significantly in BG of S-SL(p<.05). As for body balance ability, the mSEBT-A difference between L-SL and S-SL was decreased significantly in UG(p<.05). And the respective total scores of L-SL and S-SL, mSEBT-PM and mSEBT-PL were increased significantly in BG(p<.05). Conclusions: As a result, in this study above, it was confirmed that isometric exercise improved muscle activity and body balance ability in asymmetrical walkers.

• The Journal of Advanced Prosthodontics
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• 제14권6호
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• pp.379-387
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• 2022

PURPOSE. The aim of this study is to compare the casts obtained by using conventional techniques and liquid crystal display (LCD) three-dimensional (3D) print techniques in the All-on-4 treatment concept of the edentulous mandibular jaw. MATERIALS AND METHODS. In this study, a completely edentulous mandibular acrylic cast (typodont) with bone-level implants placed with the Allon-4 technique served as a reference cast. In this typodont, impressions were taken with the conventional technique and dental stone casts were obtained. In addition, after scanning the acrylic cast in a dental laboratory scanner and obtaining the Standard Tessellation Language (STL) data, 3D printed casts were manufactured with a 3D printing device based on the design. The stone and 3D printed casts were scanned in the laboratory scanner and STL data were obtained, and then the interimplant distances were measured using Geomagic Control X v2020 (3D Systems, Rock Hill, SC, USA) analysis software (n = 60). The obtained data were statistically evaluated with one-way analysis of variance (ANOVA) and Tukey's pairwise comparison tests. RESULTS. As a result of the one-way ANOVA test, it was determined that the stone casts, 3D printed casts, and reference cast values in all distance intervals conformed to the normal distribution and these values had a significant difference among them in all distance intervals. In Tukey pairwise comparison test, significant differences were found between casts at all distance intervals. In all analyses, the level of significance was determined as .05. CONCLUSION. 3D printed casts obtained with a 3D LCD printing device can be an alternative to stone casts when implants are placed in edentulous jaws. [J Adv Prosthodont 2022;14:379-87]

• 패션비즈니스
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• 제25권5호
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• pp.25-37
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• 2021

As the online shopping market grows, channels in the mobile shopping environment have become increasingly diverse as a wide variety of products are introduced every day. This study investigated the effects of the self-construal type, mobile product recommendation system type, and fashion product type on purchase intention. The experimental design of this study was a 2 (self-construal type: independent vs. interdependent) × 2 (product recommendation system: bestseller vs. content-based) × 2 (fashion product type: utilitarian vs. hedonic) 3-way mixed ANOVA. Women (n = 387) in their 20 to 30s residing in Seoul and the Gyeonggi area participated in the study. The data were analyzed with the SPSS 24 program and 3-way ANOVA and simple main effects analyses were conducted. The results were as follows. First, self-construal, product recommendation, and fashion product types had a statistically significant impact on purchase intention. Second, fashion product and consumers' self-construal types had significant interaction effects on purchase intention. Finally, product recommendation and fashion product and self-construal types showed significant 3-way interaction effects on purchase intention. The study confirmed an interaction between the self-construal, type of product recommendation system, and the type of fashion product used in influencing purchase intention.

• 한국융합학회논문지
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• 제13권5호
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• pp.435-443
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• 2022

본 연구는 간호대학생들의 임상실습 감정노동과 회복탄력성이 진로정체감에 미치는 영향을 확인하기 위한 서술적 조사연구이다. 본 연구는 각각 서울과 경기도에 소재한 2개 대학 간호학과에 재학 중인 3, 4학년 간호대학생 142명을 대상으로 2021년 9월에서 12월까지 자료를 수집하였으며, t-test, One-way ANOVA, Scheffé test, Pearson's correlation coefficients, Multiple regression 등을 이용하여 자료를 분석하였다. 진로정체감은 일반적 특성 중 전공만족도에 따라 유의한 차이를 나타내었다(F=19.97, p<.001). 감정노동과 진로정체감은 유의한 음의 상관관계를(r=-.35, p<.001), 회복탄력성과 진로정체감은 유의한 양의 상관관계를 나타내었다(r=.30, p<.001). 진로정체감에 유의한 영향을 미치는 요인으로는 전공만족도와 감정노동으로 나타났고(𝛽=-.268, p<.001), 이 요인들의 진로정체감에 대한 설명력은 29.3%로 나타났다. 본 결과를 바탕으로 간호대학생의 진로정체감 향상을 위해서는 간호전공만족도 향상 전략과 임상실습 시 경험하는 감정노동 대처능력에 대한 교육프로그램이 전반적으로 개발되어야 하겠다.

• The Journal of Advanced Prosthodontics
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• 제14권4호
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• pp.250-261
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• 2022

PURPOSE. The purpose of this study was to analyze the marginal fit of three-unit resin prostheses printed with the stereolithography (SLA) method in two build orientations (45°, 60°) and two layer thicknesses (50 ㎛, 100 ㎛). MATERIALS AND METHODS. A master model for a three-unit resin prosthesis was designed with two implant abutments. Forty specimens were printed using an SLA 3D printer. The specimens were printed with two build orientations (45°, 60°), and each orientation was printed with two layer thicknesses (50 ㎛, 100 ㎛). The marginal fit was measured as the marginal gap (MG) and absolute marginal discrepancy (AMD), and MG and AMD measurements were performed at 8 points per abutment, for 16 points per specimen. All statistical analyses were performed using SPSS software. Two-way analysis of variance (ANOVA) was separately performed on the MG and AMD values of the build orientations and layer thicknesses. Moreover, one-way ANOVA was performed for each point within each group. RESULTS. The margins of the area adjacent to the pontic showed significantly high values, and the values were smaller when the build orientation was 45° than when it was 60°. However, the margin did not differ significantly according to the layer thicknesses. CONCLUSION. The marginal fit of the three-unit resin prosthesis fabricated by the SLA 3D method was affected by the pontic. Moreover, the marginal fit was affected by the build orientation. The 45° build orientation is recommended.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• 제4권1호
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• pp.28-42
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• 2023

Seed dispersal supports community structure, maintains genetic connectivity across fragmented landscapes, and influences vegetation assemblages. In the Philippines, only two seed dispersal studies have compared different dispersal agents. We examined the seed dispersal patterns of water, wind, birds, and bats in the Caliraya Watershed, Philippines. We aimed to determine the floral species that were dispersed and how the forest characteristics influenced seed dispersal. By running seed rain traps and drift litter collection from March to June 2022, we analyzed 14,090 seeds in a privately owned study site within the watershed. Water did not exclusively disperse any species and acted as a secondary disperser. Seed density (seeds/trap) was significantly higher for bird-dispersed (n=166) and bat-dispersed (n=145) seeds than for wind-dispersed (n=79) seeds (One-way analysis of variance [ANOVA]: F_2,87=16.21, P<0.0001). Species number (species/trap) was significantly higher for bird-dispersed (n=3.7) and bat-dispersed (n=3.9) seeds than for wind-dispersed (n=0.2) seeds (One-way ANOVA: F_2,87 =16.67, P<0.0001). Birds dispersed more species because they are more diverse and access a wider variety of fruits, unlike bats. Birds and bats target different fruits and provide separate seed dispersal services. Generalized linear model analyses revealed that the number and basal area of fleshy fruit trees most strongly influenced the bird seed dispersal patterns. Therefore, we recommend a three-way approach to restoration efforts in the Caliraya Watershed: (1) ensure the presence of fleshy fruit trees in restoration zones, (2) assist the establishment of mid-successional and wind-dispersed trees, and (3) intensify the conservation efforts for both flora and faunal diversity.

• 디지털융복합연구
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• 제20권3호
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• pp.549-556
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• 2022

본 연구는 간호대학생을 대상으로 응급피임약 사용의도에 영향을 미치는 요인을 분석하기 위한 서술적 조사연구이다. 2021년 2월 3일부터 2021년 2월 25일까지 J도에 소재한 간호대학생 195명을 대상으로 온라인 설문을 실시하였다. SPSS/WIN 22 프로그램을 이용하여 기술통계, independent-test, one-way ANOVA, Pearson's correlation coefficient test, and multiple regression으로 분석하였다. 연구결과 대상자들의 응급피임약에 대한 지식은 6.78±2.46점(12점 만점), 태도는 3.04±0.64점(5점 만점), 사용의도는 4.30±0.90점(5점 만점)으로 나타났다. 학년과 성관계 경험여부, 응급피임약 인지여부, 응급피임약 교육경험, 응급피임약 교육요구도와 응급피임약에 대한 지식, 태도는 사용의도를 총13.4% 설명하는 것으로 나타났다(F=5.272, p<.001). 결론적으로 필요시 응급피임약의 적절한 사용으로 불필요한 처치를 예방하기 위해 응급피임에 대한 교육프로그램 개발이 필요하며 교육 프로그램 효과를 검증하는 연구를 제언한다.