• 한국인구학
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• 제10권2호
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• pp.1-16
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• 1987

이 논문은 미국 노동시장의 재취업과정을 사건사의 실업자료를 이용하여 분석하였다. 재취업과정은 실업기간에 따라 변화하는 재취업률의 변화로 파악하였다. 분석에서는 이중노동 시장의 구조적 특성이 재취업과정에 미치는 영향을 살펴보았다. 이차노동시장은 경쟁시장이다. 경쟁시장에서 사람들은 더 나은 직장을 찾기 위해 직장을 그만두기 때문에 자발적 실업이 발생한다. 직장탐색이론에 의하면 자발적 실업에서 사람들은 실업기간이 경과하면서 자신의 의중임금을 떨어뜨림으로써 재취업률을 높이고자 한다. 이에 반하여, 일차노동시장은 장기간 고용관계로 이루어진, 경쟁적 성격이 약한 노동시장이다. 장기적 고용관계에서 실업은 경기가 좋지 않은 시기에 일시해고에 의해 비자발적으로 발생한다. 계약이론에 의하면 일시해고를 당한 사람은 원래의 직장에서 다시 부를 때까지 기다리기 때문에 재취업률은 실업기간에 관계없이 일정하다. 실증분석의 결과는 재취업과정이 이중노동시장에 의해 영향을 받는다는 사실을 보여주고 있다. 즉 일차노동시장에서 사람들은 실업을 당했을 경우, 기업에서 다시 부르기를 기다리는 성향이 강하게 나타났다. 한편 이차노동시장에서 실업을 당한 사람들의 경우, 새로운 직장을 찾는 경향이 높았다. 그러나 실업기간에 따른 재취업률의 변화는 직장탐색이론이 예측하는 수준보다 낮게 나타났다.

• 한국유통학회지:유통연구
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• 제10권2호
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• pp.27-47
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• 2005

본 연구는 기본적으로 프랜차이즈 본부와 가맹점간의 관계성과에 초점을 맞추고 있다. 내부정치 차원에서 결속에 영향을 미치는 관계특성 변수를 규명함과 동시에 결속에 의한 성과를 종합적으로 분석하여 관계관리에 대한 효율적인 방안을 모색하는데 그 목적이 있다. 실증은 국내 대표적인 외식 프랜차이즈 가맹점의 관점에서 진행하였다. 연구결과 비강압적 영향전략, 의존성, 협력, 목표불일치가 결속에 유의한 영향들 미치는 것으로 나타났다. 다만 강압적 영향전략은 결속에 뚜렷한 영향을 주지 않고 있다. 또한 결속은 성과와 연계되어 채무성과와 역할설과를 증대시키는 것으로 나타났다. 따라서 프랜차이즈 시스템의 관계를 더 효과적으로 발전시키기 위해서는 장기적인 결속을 통해 Win-Win 관계를 구축하는 노력이 중요하다고 할 수 있다.

• Asian Pacific Journal of Cancer Prevention
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• 제14권11호
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• pp.6875-6881
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• 2013

Background: Studies evaluating smoking cessation treatment outcomes in cancer patients are scarce, despite smoking cessation importance in cancer care. We sought to add to the literature by evaluating smoking cessation in a challenging group of cancer patients (medium-to-heavy smokers) visiting an out-patient smoking cessation clinic (SCC) in a cancer center in Amman, Jordan. Materials and Methods: Patients smoking >9 cigarettes per day (CPD) and referred to the SCC between June 2009 and May 2012 were studied. Clinic records were reviewed to measure demographic and baseline clinical characteristics, and longitudinal (3-, 6- and 12- month) follow-up by phone/clinic visit was conducted. At each follow-up, patients were asked if they experienced medication side-effects, if they had returned to smoking, and reasons for failing to abstain. Descriptive and multivariable logistic regression analyses were performed. Results: A total of 201 smokers were included in the analysis. The 3-month abstinence was 23.4% and significantly associated with older age, being married, and presenting with lower (${\leq}10ppm$) baseline carbon monoxide (CO) levels. On a multivariable level, lower CO levels, a higher income (relative to the lowest income group), being older, and reporting severe dependence (relative to dependence reported as 'somewhat' or 'not') were significant predictors of higher odds of abstinence at three months. Reasons for failing to quit included not being able to handle withdrawal and seeing no value in quitting. Long-term ARs did not reach 7%. Conclusions: In a sample of Jordanian smokers (>9CPD) with cancer and receiving smoking cessation treatment, ARs were low and further declined with time. Results underscore the need for more aggressive patient management and rigorous follow-up during and after smoking cessation treatment, particularly when this takes place in challenging settings. Observed reasons for failure to abstain should be used to tailor counseling practices.

• 한국인구학
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• 제20권2호
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• pp.43-66
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• 1997

이 논문은 미국 노동시장의 재취업과정을 사건사의 실업자료를 이용하여 분석하였다. 재취업과정은 실업기간에 따라 변화하는 재취업률의 변화로 파악하였다. 분석에서는 이중노동 시장의 구조적 특성이 재취업과정에 미치는 영향을 살펴보았다. 이차노동시장은 경쟁시장이다. 경쟁시장에서 사람들은 더 나은 직장을 찾기 위해 직장을 그만두기 때문에 자발적 실업이 발생한다. 직장탐색이론에 의하면 자발적 실업에서 사람들은 실업기간이 경과하면서 자신의 의중임금을 떨어뜨림으로써 재취업률을 높이고자 한다. 이에 반하여, 일차노동시장은 장기간 고용관계로 이루어진, 경쟁적 성격이 약한 노동시장이다. 장기적 고용관계에서 실업은 경기가 좋지 않은 시기에 일시해고에 의해 비자발적으로 발생한다. 계약이론에 의하면 일시해고를 당한 사람은 원래의 직장에서 다시 부를 때까지 기다리기 때문에 재취업률은 실업기간에 관계없이 일정하다. 실증분석의 결과는 재취업과정이 이중노동시장에 의해 영향을 받는다는 사실을 보여주고 있다. 즉 일차노동시장에서 사람들은 실업을 당했을 경우, 기업에서 다시 부르기를 기다리는 성향이 강하게 나타났다. 한편 이차노동시장에서 실업을 당한 사람들의 경우, 새로운 직장을 찾는 경향이 높았다. 그러나 실업기간에 따른 재취업률의 변화는 직장탐색이론이 예측하는 수준보다 낮게 나타났다.

• The Journal of Advanced Prosthodontics
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• 제9권3호
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• pp.217-223
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• 2017

PURPOSE. This study investigated the effects of silver nanoparticle (SN) loading into hydraulic calcium silicate-based Portland cement on its mechanical, antibacterial behavior and biocompatibility as a novel dental bone substitute. MATERIALS AND METHODS. Chemically reduced colloidal SN were combined with Portland cement (PC) by the concentrations of 0 (control), 1.0, 3.0, and 5.0 wt%. The physico-mechanical properties of silver-Portland cement nanocomposites (SPNC) were investigated through X-ray diffraction (XRD), setting time, compressive strength, solubility, and silver ion elution. Antimicrobial properties of SPNC were tested by agar diffusion against Streptococcus mutans and Streptococcus sobrinus. Cytotoxic evaluation for human gingival fibroblast (HGF) was performed by MTS assay. RESULTS. XRD certified that SN was successfully impregnated in PC. SPNC at above 3.0 wt% significantly reduced both initial and final setting times compared to control PC. No statistical differences of the compressive strength values were detected after SN loadings, and solubility rates of SPNC were below 3.0%, which are acceptable by ADA guidelines. Ag ion elutions from SPNC were confirmed with dose-dependence on the concentrations of SN added. SPNC of 5.0 wt% inhibited the growth of Streptococci, whereas no antimicrobial activity was shown in control PC. SPNC revealed no cytotoxic effects to HGF following ISO 10993 (cell viability > 70%). CONCLUSION. Addition of SN promoted the antibacterial activity and favored the bio-mechanical properties of PC; thus, SPNC could be a candidate for the futuristic dental biomaterial. For clinical warrant, further studies including the inhibitory mechanism, in vivo and long-term researches are still required.

• 전기학회논문지
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• 제67권3호
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• pp.448-453
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• 2018

PV module protective film plays an important role in protecting the solar cell from external environment by anti-hydrolysis polyester, UV resistance and mechanical properties. The backsheet was manufactured by using Roll-to-Roll dry laminating process. The backsheet structure is composed of 3 layers, which are PE, PET, and Fluorine polymer films. In this study, we have experimented the variation of thermal conductivities depending on MgO inputs 10% to 25% in order to confirm the dependence of the module efficiencies. High thermal conductive backsheet can increase the module output power efficiency because the heat is dissipated by spreading out the internal heat. Long-term environment weatherability tests were conducted for confirming 25 year reliability in the field such as PCT, UV, and power efficiency degradations. As the evaluation result, high thermal conductivity can be effective for increase of power efficiency of solar panel by using thermal conductive MgO masterbatch.

• 한국대기환경학회지
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• 제13권6호
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• pp.451-461
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• 1997

The soil NO flux measurements in Korea were made from 17 May 1997 to 16 June 1997 on grass land at Kunsan National University in southwestern Korea by using flow-through chamber technique. The experiment was conducted in an effort to determine the role of natural emissions of NO on rural atmospheric photochemistry, and to understand the soil NO emission mechanism with respect to soil parameters. Soil NO fluxes were measured every minutes and averaged in every 15 minutes as well as soil temperature. Soil samples were analyzed for $NO_3^-, NH_4^+$, and moisture in soil. Soil nitrate was not detected in most times, and total N-containing was limited in site soils. There was a optimum range of soil moisture and temperature for soil NO flux. The overall average of soil NO emission rates were found to be 1.30 $\pm 0.92 ngNm^{-2}s^{-1}$ (n=1219), and ranged from 0.01 ngNm^{-2}s^{-1}$ to 5.62 ngNm^{-2}s^{-1}$. Diurnal variation of soil NO emission was typical, which was in higher level during daytime, and was in lower level over the night. NO flux showed a strong soil temperature dependence $(r^2=0.78)$, but not with soil moisture and soil N-containing during this experimental period; NO fluxes increased exponentially as soil temperature increased. In order to assure the relevant relationship between soil NO flux and the soil parameters, long-term soil flux measurement on different types of land use should be planned and conducted continuously.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제18권2호
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• pp.184-199
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• 1996

The challenges to achieve three dimensional facial proportionality and occusal stability in many patients with complex dentofacial deformity have been met by the development and use of the maxilla, mandible, and chin surgery techniques in combination with efficient orthodontic treatment. There is a clinical, biological, and biomechanical foundation for simultaneous surgical repositioning of the maxilla, mandible, and chin in a significant proportion of adult and adolescent patients. A combination of the surgical and orthodontic approach may provide increased treatment efficiencies and optimal esthetic results. Art and science to determine the treatment objectives, specifically, the desired soft tissue changes are firstly established by using the clinician's "esthetic sense" of the facial beauty and proportion aided to a few cephalometric guidelines. In this sense, the dependence on the clinician's "esthetic eye" by Dr. Bell is more important in analyzing the facial proportion than the satisfaction of rigid cephalometric norms. The purpose of this article was to elucidate the indication for simultaneous surgical repositioning of the maxilla, mandible, and chin, and to describe the clinical cephalometric analysis for orthognathic surgery. Representative 6 case reports were presented and discussed to illustrate the esthetic, orthodontic, and surgical treatment objectives with long-term follow-up.

• 한국의학물리학회:학술대회논문집
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• 한국의학물리학회 2003년도 제27회 추계학술대회
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• pp.76-76
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• 2003

Purpose: To assess clinical proton MR spectroscopy (MRS) as a noninvasive method for evaluating tumor malignancy at 3T high field system. Methods: Using 3T MRI/MRS system, localized water-suppressed single-voxel technique in patients with brain tumors was employed to evaluate spectra with peaks of N-acetyl aspartate (NAA), choline-containing compounds (Cho), creatine/phosphocreatine (Cr) and lactate. On the basis of Cr, these peak areas were quantificated as a relative ratio. Results: The variation of metabolites measurements of the designated region in 10 normal volunteers was less than 10%. Normal ranges of NAA/Cr and Cho/Cr ratios were 1.67$\pm$018 and 1.16:1:0.15, respectively. NAA/Cr ratio of all tumor tissues was significantly lower than that of the normal tissues (P=0.005). Cho/Cr ratio of high-grade gliomas was significantly higher than that of low-grade gliomas (P= 0.001), Except 4 menigiomas, lactate signal was observed in all tumor cases. Conclusions: The present study demonstrated that the neuronal degradation or loss was observed in all tumor tissues. Higher grade of brain tumors was correlated with higher Cho/Cr ratio, indicating a significant dependence of Cho levels on malignancy of gliomas. This results suggest that clinical proton MR spectroscopy could be useful to predict tumor malignancy. Acknowledgement: This study was supported by a grant of the Mid and Long Term Nuclear R/D Plan Program, Ministry of Science and Technology, Republic of Korea.

• 동의신경정신과학회지
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• 제24권3호
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• pp.263-270
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• 2013

Objectives : Galgunhaejutang extract (GHT) is a Traditional Korean medical herbal mixture that has been tradtionally used to treat alcohol consumption. This study was preformed to evaluate the effects of GHT on alcohol consumption in C57BL/6 mice. Methods : Sixty three C57BL/6 mice were alcohol dependence-induced by limited access paradigm. Water, GHT 0.688 g/kg (GHT-L), or GHT 3.45 g/kg (GHT-H) were administrated for 10 days. The amounts of alcohol consumption for 2 hours, water consumption for 22 hours, food intake for 24 hours and body weight were measured. Results : There weren't significant differences in 2 hours of alcohol consumption, 22 hours of water consumption, 24 hours of food intake and body weight for ten days between vehicle group and GHT-L or GHT-H group. Conclusions : Further studies employing multi-dose and long term administration of GHT (more than 10 days) might be of benefit.