• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.3
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• pp.389-398
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• 2018

This study examined the influence of problem solving ability, communication skill and self-efficacy on clinical competence of nursing students. The research subjects were 184 grade 4 nursing students in D and G city. Data were collected from September 1 to September 10, 2016 and analyzed by independent t-test, one-way ANOVA, Pearson's correlation, and stepwise multiple regression using the IBM SPSS/WIN 20.0 program. The results showed that the problem solving ability was 3.60, communication skill was 3.79, and self-efficacy was 3.45. The clinical competence was positively correlated with problem solving ability, communication skill and self-efficacy. Problem solving ability (${\beta}=0.283$, p<0.001), self-efficacy (${\beta}=0.249$, p<0.001), motivation for nursing (${\beta}=0.182$, p=0.002), communication skills (${\beta}=0.176$, p=0.016), and interpersonal relationships (${\beta}=0.101$, p=0.082) explained 42.8% of the total variance in clinical competence of nursing students. The most significant predictors of clinical competence were problem solving ability, followed by self-efficacy and communication skills. Therefore, it is necessary to develop an empowerment program to improve problem solving ability, self-efficacy and communication skills of nursing students.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.5
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• pp.249-258
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• 2013

In multi-hop ad hoc networks, multi-interface multi-channel architecture is being noticing as methodology to improve the effective bandwidth and end-to-end throughput, But since existing routing metrics designed for networks based on single-interface exactly can not reflects the nature of networks based on multi-interface multi-channel, we are not expected the effect of throughput improvement. there had been proposal of MCR that discover high throughput by using metrics such as channel diversity and interface switching cost. however, MCR have an problem that is degraded it's performance in congested networks, because it not reflects the impact of traffic load. in this paper, we propose MAMCR metric, which select high throughput paths under congested conditions by combination MCR with channel access time metric, and conform it's the effect of performance improvement by ns-2 simulation.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.33 no.4
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• pp.245-249
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• 2007

The alternation of extracellular matrix (ECM) protein in aging process is associated with symptoms such as wrinkling and loss of elasticity in skin. Now, the major target proteins for anti-aging have been metalloproteases and the structural proteins such as collagen and elastin. Recently, the interaction of cell and ECM proteins (collagen, fibrillin, and fibronectin) is reported to have an important role in survival, proliferation and tissue reconstruction. Fibronectin is a matrix adhesion protein which binds to collagen and integrin and degraded by serine proteases. It has been reported that fragments of fibronectin (Fn-fr's) were involved in matrix metalloproteases (MMPs) expression in osteoblast. But, the role of Fn-fr's in human skin and in skin cells has not been reported yet. Therefore, we investigated the differences of fibronectin fragmentation pattern between young and aged human skin, and demonstrated that the fragmentation of fibronectins is significantly increased in aged human skin. Also, treatment of Fn-fr's (70, 45 kDa) increased MMP-1 expression and MMP-2 activity in human dermal fibroblasts. Our results suggest that Fn-fr's as a potential new factor to accelerate skin aging.

• Journal of Korean society of Dental Hygiene
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• v.15 no.1
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• pp.55-62
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• 2015

Objectives: The purpose of this study was to investigate the associated factors of self-reported dry mouth in adults. Methods: A self-reported questionnaire was filled out by 249 adults in Seoul and Gyeonggi-do from June to October, 2014. The questionnaire consisted of general characteristics of the subjects, age, monthly income, smoking, alcohol drinking, and systemic diseases including systemic diseases, medication, oral health status, and stress. The question for dry mouth consisted of dryness in skin, eyes, lips, and nasal mucosa. The subjective dry mouth consisted of 6 questions measured by visual analogue scale(VAS). Cronbach's alpha was 0.881 in the study. Oral health related quality of life (OHIP-14) was adapted from Yoon. The questionnaire for OHIP-14 included functional limitation, physical pain, psychological disability, social disability, and experience in hadicap measured by Likert 5 scale. Cronbach's alpha was 0.885 in the study. Data was analyzed for a t-test, one-way ANOVA and multiple regression analysis by using SPSS(SPSS 18.0, USA) program. Results: There were positive correlations between oral health-related quality of life and self-reported dry mouth (functional limitation r=0.288, physical pain r=0.219, psychological discomfort r=0.193, physical disability r=0.280, psychological disability r=0.205, social disability r=0.224 and handicap r=0.270). In the multiple regression analysis, variation of self-reported dry mouth were positively associated with dry eyes{very often(${\beta}=0.305$)), sometimes(${\beta}=0.186$)}, dryness on lips{very often(${\beta}=0.247$), sometimes(${\beta}=0.177$)}, handicap(${\beta}=0.152$), physical disability(${\beta}=0.128$) and alcohol drinking(1-2 times/week)(${\beta}=0.116$) (p<0.001). Conclusions: Self-reported dry mouth may cause deterioration of the entire body dryness(dryness on eyes and lips), low oral health-related quality of life(handicap and physical disability) and alcohol drinking. Thus, It is necessary to develop oral health education programs to prevent and manage dry mouth in adults.

• Journal of the Korean Society of Hazard Mitigation
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• v.9 no.3
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• pp.59-65
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• 2009

To investigate a posttraumatic stress, social support and work burden and to identify high risk group and related factors which were exerted influence on posttraumatic stress of firefighters. Data were gathered from total 264 firefighters consisting of 85 fire distinguishers & rescue workers, 96 emergency medical personnel and 83 in ambulance & fire truck drivers in C province and were analyzed 22 items by IES-R, 20 work burden items by Choi(2000), 8 social support items by Oh(2006) using SPSSWIN 14.0 program. Posttraumatic stress of general characteristics by work was showed significant difference in age, marriage status, education, position, office duration, mobilization frequency and experience of traumatic events. Posttraumatic stress were showed significant difference in 3 groups and fire distinguishers & rescue workers is the highest group. Posttraumatic stress was correlated with work burden(r=.317, p<0.01) for fire distinguishers & rescue workers, social support(r=-.331, p<0.01) and work burden(r=.522 p<0.001) for emergency medical personnel and work burden(r=.454, p<0.01) for ambulance & fire truck drivers. The high risk groups are fire distinguishers & rescue workers(60%), emergency medical personnel(55.2%)and ambulance & fire truck drivers(45.8%). Related factors are the experience seeing victim's danger for fire distinguishers & rescue workers(odds ratio=1.216, 95% confidence interval:1.068-1.383), and are work burden(odds ratio=1.100, 95% confidence interval:1.043-1.159) and office duration(odds ratio=1.010, 95% confidence interval 1.001-1.018) for emergency medical personnel, and are the experience seeing victim's danger(odds ratio=1.178, 95% confidence interval:1.010-1.373), age(odds ratio=1.129, 95%confidence interval:1.020-1.249), work burden(odds ratio=1.103, 95% confidence interval:1.034-1.177) for ambulance & fire truck drivers.

• JSTS:Journal of Semiconductor Technology and Science
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• v.4 no.3
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• pp.240-249
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• 2004

In the present paper efforts have been made to optimize InAlAs/InGaAs HEMT by enhancing the effective gate voltage ($(V_c-V_off)$) using pulsed doped structure from uniformly doped to delta doped for microwave frequency applications and reliability. The detailed design criteria to select the proper design parameters have also been discussed in detail to exclude parallel conduction without affecting the del ice performance. Then the optimized value of $V_c-V_off$and breakdown voltages corresponding to maximum value of transconductance has been obtained. These values are then used to predict the transconductance and cut-off frequency of the del ice for different channel depths and gate lengths.

• 한국전산유체공학회:학술대회논문집
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• 2005.10a
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• pp.249-253
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• 2005

The turbulence noise generated from blunt trailing-edge is numerically predicted by using the hydrodynamic/acoustic splitting method at the Reynolds number based on thickness of flat plate, $Re_h=1000$, and the freestream Mach number $M_o=0.2$. The turbulent flow field is simulated by incompressible large-eddy simulation and the acoustic field is predicted efficiently with the linearized perturbed compressible equations (LPCE) recently proposed by the authors. The turbulent flow characteristics are validated with the results of the previous experimental study and direct numerical simulation. The acoustic properties predicted from LPCE are compared with the solutions of analytical formulations.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.31 no.2
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• pp.88-93
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• 2020

Objectives: Mood disorder is highly comorbid with attention deficit/hyperactivity disorder (ADHD), and comorbid ADHD symptoms are associated with suicide risk. The aim of this study was to examine the association between comorbid ADHD symptoms and the number of suicide attempts among patients with unipolar and bipolar depression. Methods: In this cross-sectional study, 100 patients with either unipolar or bipolar depression constituted the final sample. Pearson's correlation and multiple regression analyses were conducted to examine the association between comorbid ADHD symptoms and suicide risk. Results: Among patients with bipolar depression, the number of suicide attempts was significantly correlated with ADHD symptoms (r=0.324, p<0.01). ADHD symptoms significantly predicted the number of suicide attempts (β=0.249, p<0.05). Conclusion: Our findings underscore the importance of screening and assessing ADHD symptoms in male young adults with depressive disorders.

• Proceedings of the KWS Conference
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• 2004.05a
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• pp.249-251
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• 2004

According to our fatigue tests carried out at 20 ㎐, R=0.1 on transversely butt-welded joints, fatigue strengths of as-welded specimens, that is, specimens having residual stress are higher than those of annealed specimens in short hie range, but vice verse in long life range. This behavior seems to be concerned mainly with residual stress relaxation by applied loading. After analyzing the welding process, we conducted finite element analysis to quantify the degree of residual stress relaxation. By taking into account residual stress relaxation, modified Goodman diagram, and nominal stress, we evaluated the fatigue life of the welded joint from the S-N curve for the parent material. The estimated results are in a good agreement with the experimental results.

• Current Research on Agriculture and Life Sciences
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• v.31 no.4
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• pp.245-249
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• 2013

In 2008, leaf blight symptoms were observed on several Chinese chive farms in Sangju. The Pathogenicity of the isolate was confirmed by artificial inoculation, where the pathogen exhibited a strong pathogenicity toward healthy plants. Morphological classification identified the isolate as from the Fusarium genus. For further analysis, PCR and phylogenetic classification were performed with ITS region and 28S rRNA gene which are commonly used for fungal identification. However, the results provided a poor resolution. To solve this problem, we analyzed translation elongation factor 1-alpha (TEF-$1{\alpha}$) gene. The analyzed results using TEF-$1{\alpha}$ gene indicated that the isolate was F. proliferatum. Therefore, it is assumed that TEF-$1{\alpha}$ gene is important when Fusarium sp. was identified using molecular classification method.