• 디지털융복합연구
• /
• 제12권7호
• /
• pp.389-400
• /
• 2014

본 연구는 청소년들의 스마트폰 중독이 심리적 마음상태에 어떠한 영향을 미치는가에 대하여 알아보는 것을 목적으로 한다. 이를 위해 전주시에 소재한 청소년을 대상으로 설문조사를 실시하였고, 수거한 자료는 SPSS 통계 분석 프로그램을 사용하여 t-검정, 분산분석, 상관분석과 회귀분석을 실시하여 분석하였다. 분석 결과 청소년들의 스마트폰 중독이 심리적 마음상태에 미치는 영향이 유의미한 것으로 나타났으며, 스마트폰 중독이 높을수록 심리적 마음상태는 낮아지는 것으로 나타났다. 본 연구결과는 청소년들의 스마트폰 중독에 대한 이해의 폭을 넓히는데 중요한 자료가 될 것이며, 청소년들이 바람직한 스마트폰 사용 방향을 인식하게 되는 계기를 마련할 수 있을 것이다. 또한, 청소년 복지에서 문제시 되고 있는 스마트폰 중독에 대한 예방과 치료를 위한 기초자료로서 활용 될 수 있을 것이다.

• 전자공학회논문지D
• /
• 제36D권4호
• /
• pp.48-56
• /
• 1999

본 논문에서는 초기 산소 농도가 고에너지 이온 주입시 결정 격자 손상에 의해 발생하는 산소 축적(pileup) 현상 및 주입된 불순물의 확산에 미치는 영향을 실험적으로 고찰하였다. 초기 산소 농도가 11.5, 15.5 ppma인 p-type (100)실리콘 웨이퍼에 \sup 11\B\sup +\ \sup 31\P\sup +\ 이온을 각각 1.2 MeV, 2.2 MeV 의 에너지로 1×10\sup 15\cm\sup 2\ 주입하고, 700℃(20시간)+1000℃(10시간)의 2단계 열처리를 거치 후 주입된 불순물 및 산소 농도의 분포를 이차이온질량분석기 (Secondary Ion Mass Spectrometry, SIMS)로 관찰하였으며 잔류 2차 결함의 분포는 투과전자현미경(Transmission Electron Microscopy, TEM)으로 관찰하였다. SIMS 측정 결과 산소의 축적이 {{{{ { R}_{ } }}}}\sub p\(projected range) 부근에서 관찰되었으며 열처리 후에도 상당한 양의 2차 결합 띠가 {{{{ { R}_{ } }}}}\sub p\부근에서 관찰되는 것으로 보아 2차 결함에 의해 산소가 포획되었음을 알 수 있다. 또한 붕소와 인의 확산은 웨이퍼의 초기 산소 농도가 클수록 벌크 방향으로의 확산이 증대되는 현상을 볼 수 있었다.

• 대한치과기공학회지
• /
• 제32권4호
• /
• pp.317-325
• /
• 2010

Purpose: The aim of this study is to make some basic materials to find retention force difference based on the total height of CAD/CAM zirconia abutment used for implant, retention force difference based on how to regulate the height of the abutment, retention force difference based on the size and retention force difference based on the design group. Methods: The retention force was measured by being pulled at the speed of 1mm/min after being combined with zirconia block and abutment using Temp-BOND of Kerr. The experiment was done at the research lab of OSTEM in Busan by useing UNIVERSAL TESTING MACHINE on March 3rd, 2010. Results: After analysing the total height and the retention force, p-value had minor difference by 0.01 statistically. Namely, 3mm, 4mm, 5mm had the retention force difference and we could see retention force difference on 3mm and 5mm at the post test. After analyzing how to regulate the height and retention force, p-value had minor difference by 0.000 statistically. Namely, 1mm and 2mm had the retention difference and we could see that 1mm and 2mm with the total height had retention difference. After analyzing the retention force based on the size, p-value had minor retention force difference by 0.000 statistically. Namely, 7 different size had retention force difference and we could see the size 21.9mm, 32.9mm, 32.9mm, 38.4mm, 48.9mm and 54.9mm had retention force difference. Conclusion: Namely 9 different design group had retention difference and we could see that 9 design group with 5.6.7.8 design group and 9 design group with 1.2.3.4. design group had retention force.

• 대한암한의학회지
• /
• 제22권1호
• /
• pp.37-48
• /
• 2017

Objectives: The purpose of this study was to suggest the direction for the development of a clinical practice guideline (CPG) for esophageal cancer (EC). Methods: We collected and analyzed CPGs and related data about esophageal cancer by searching the database of domestic and foreign articles. Results: There were little contents or proposals related to Korean Medicine (KM) or Traditional Chinese Medicine (TCM), those related to KM or TCM can be found only in "Guidelines of Diagnosis and Therapy in Oncology with Traditional Chinese Medicine (惡性腫瘤中醫診療指南)". They were symptom factors, syndrome differentiation (SD) and 'treatment process of esophageal cancer by combination of western medicine and Korean medicine'. Conclusions: The topics of the development Korean medicine CPG for EC are (1) the method and procedure about combination of western medicine and Korean medicine (2) the process of SD and diagnosis (3) safety and efficacy of the herbal medicine and preparation (4) availability and timing of the tools related to KM or TCM like acupuncture, moxibustion, massage, etc.

• Biomolecules & Therapeutics
• /
• 제25권4호
• /
• pp.441-451
• /
• 2017

Imperatorin, a major bioactive furanocoumarin with multifunctions, can be used for treating neurodegenerative diseases. In this study, we investigated the characteristics of imperatorin transport in the brain. Experiments of the present study were designed to study imperatorin transport across the blood-brain barrier both in vivo and in vitro. In vivo study was performed in rats using single intravenous injection and in situ carotid artery perfusion technique. Conditionally immortalized rat brain capillary endothelial cells were as an in vitro model of blood-brain barrier to examine the transport mechanism of imperatorin. Brain distribution volume of imperatorin was about 6 fold greater than that of sucrose, suggesting that the transport of imperatorin was through the blood-brain barrier in physiological state. Both in vivo and in vitro imperatorin transport studies demonstrated that imperatorin could be transported in a concentration-dependent manner with high affinity. Imperatorin uptake was dependent on proton gradient in an opposite direction. It was significantly reduced by pretreatment with sodium azide. However, its uptake was not inhibited by replacing extracellular sodium with potassium or N-methylglucamine. The uptake of imperatorin was inhibited by various cationic compounds, but not inhibited by TEA, choline and organic anion substances. Transfection of plasma membrane monoamine transporter, organic cation transporter 2 and organic cation/carnitine transporter 2/1 siRNA failed to alter imperatorin transport in brain capillary endothelial cells. Especially, tramadol, clonidine and pyrilamine inhibited the uptake of [$^3H$]imperatorin competitively. Therefore, imperatorin is actively transported from blood to brain across the blood-brain barrier by passive and carrier-mediated transporter.

• 경영정보학연구
• /
• 제9권3호
• /
• pp.33-43
• /
• 2007

학회 저널은 우리 모두가 가꾸고 지켜 나가야할 귀중한 재산이다. 최근 ISR 저널의 성격에 대해 여러 가지 의견이 개진되어오고 있다. 특히 실무 지향적이고 현장 업무에 기여할 수 있는 지식의 공유 장소라는 원래의 목표가 이루어져왔는가에 대해 많은 우려가 나오고 있는 실정이다. 이에 ISR 논문의 현상을 분석하고, 이를 기초로 ISR 저널이 나아갈 방향에 대해 논문의 성격과 심사 방안 등에 대해 몇 가지 제안을 드리고자 한다. 여기서 제시된 안을 토대로 학회 모두의 활발한 의견 개진과 토론이 이어지길 기대한다.

• 한국화재소방학회논문지
• /
• 제34권1호
• /
• pp.89-102
• /
• 2020

인체 건강에 치명적인 위해를 가할 수 있는 독성 및 인화성 가스를 이용한 화학테러행위는 행위자인 테러범과 그 행위로 인한 피해자 간에 존재하는 현격한 정보의 비대칭성으로 인해 대다수의 선진국, 또는 국지적 분쟁을 겪고 있는 국가 및 지역사회에 대하여 중대한 안보위협이 되고 있다. 화학테러에 대한 대응기관의 대처방안은 크게 예방, 대응, 수습의 3단계로 나누어 볼 수 있고, 이 과정 중에서 화학테러의 피해 정도 및 피해 범위에 절대적인 영향력을 미치는 예방과 대응단계에 해당하는 각 전문대응기관과 요원들의 성공적인 임무수행을 위해서는 화학테러의 잠재적 대상이 되는 시설들에 대한 객관적이고 체계화된 취약성의 평가와 등급화가 무엇보다 중요하다. 본 연구에서는 기존 국내외의 화학테러관련 취약성 등급분류체계를 비교분석하고 현재 국내 등급분류체계의 개선방향에 대해 살펴보고 실제 국내 다중이용시설 표본에 대한 취약성 평가를 통해서 보다 과학적이고 체계화된 방법론을 제시하였다.

• 전자공학회논문지A
• /
• 제31A권7호
• /
• pp.85-94
• /
• 1994

A high-resolution transmission electron microscopy study of the solid phase crystallization of the amorphous silicon thin films, deposited on SiOS12T at 52$0^{\circ}C$ by low pressure chemical vapor deposition and annealed at 55$0^{\circ}C$ in a dry N$_{2}$ ambient was carried out so that the arrangement of atoms in the crystalline silicon and at the amorphous/crystalline interface of the growing grains could be understood on an atomic level. Results show that circular crystalline silicon nuclei have formed and then the grains grow to an elliptical or dendritic shape. In the interior of all the grains many twins whose{111} coherent boundaries are parallel to the long axes of the grains are observed. From this result, it is concluded that the twins enhance the preferential grain growth in the <112> direction along {111} twin planes. In addition to the twins. many defect such as intrinsic stacking faults, extrinsic stacking faults, and Shockley partial dislocations, which can be formed by the errors in the stacking sequence or by the dissociation of the perfect dislocation are found in the silicon grain. But neither frank partial dislocations which can be formed by the condensation of excess silicon atoms or vacancies and can form stacking fault nor perfect dislocations which can be formed by the plastic deformation are observed. So it is concluded that most defects in the silicon grain are formed by the errors in the stacking sequence during the crystallization process of the amorphous silicon thin films.

• 사상체질의학회지
• /
• 제29권1호
• /
• pp.21-28
• /
• 2017

Objectives The purpose of this study was to investigate of Quality of life and Mibyeong index of abnormal symptoms by Sasang constitution. Methods A total of 1,100 people were recruited into this study and were collected by Gallup Korea. Sasang constitutions were diagnosed based on KS-15 (Korean sasang constitutional diagnostic questionnaire) Questionnaire which comprised body type, personality and symptom. In addition, SF-12 (Shot form-12) questionnaire was used to evaluate the quality of life status. Mibyeong status was categorized through Mibyeong tool. Data were analyzed through one-way ANOVA to investigate the difference between quality of life and Mibyeong index on Sasang constitution. Results The PCS (physical component scale) which represents the physical health index and MCS (mental component scale) which represents mental health index showed significant differences among Sasang constitution (p<.001). In addition, The Mibyeong Index (p<.001) which represents abnormal symptom type showed significant difference for Sasang constitution. As for the Mibyeong, only pain (p=0.047) and fatigue (p=0.021) had changes for the Sasang constitution. Conclusions Quality of life and Mibyeong index vary significantly according to Sasang constitution. This results suggest the analysis of Mibyeong index by Sasang constitution could provide the setting of direction to promote public health depending on Sasang constitution.

• 신재생에너지
• /
• 제9권2호
• /
• pp.30-39
• /
• 2013

Multi-crystalline silicon solar cells is not exist a specific crystal direction different from single crystalline silicon solar cells. In functional materials, therefore, isotropic wet etching of mc-Si solar cell is easy the acid solution rather than the alkaline solution. The reflectance of wet texturing process is about 25% and the reflectance of RIE texturing process is achieved less than 10%. In addition, wet texturing has many disadvantages as well as reflectance. So wet texturing process has been replaced by a RIE texturing process. In order to apply BIPV, RIE and wet textured multi-crystalline silicon solar cell modules was manufactured by different kind of EVA sheet. Moreover, in case of BIPV, the short circuit current characteristics according to the angle of incidence is more important, because the installation of BIPV is fixed location. In this study, we has measured SEM image and I-V curve of RIE and wet textured silicon solar cell and PV module. Also we has analyzed quantum efficiency characteristics of RIE and wet textured silicon solar cell for PV modules depending on incidence angle.