• 지질공학
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• 제32권4호
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• pp.467-482
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• 2022

The Yeonghae basin is located at the northeastern part of the Yangsan fault (YSF; a potentially active fault). The study of the architecture of the Yeonghae basin is important to understand the activity of the Yangsan fault system (YSFS) as well as the basin formation mechanism and the activity of the YSFS. For this study, Digital Elevation Model (DEM) was used to highlight the marginal faults, and structural fieldwork was performed to understand the geometry of the intra-basinal structures and the nature of the bounding faults. DEM analysis reveals that the eastern margin is bounded by the northern extension of the YSF whereas the western margin is bounded by two curvilinear sub-parallel faults; Baekseokri fault (BSF) and Gakri fault (GF). The field data indicate that the YSF is striking in the N-S direction, steeply dipping to the east, and experienced both sinistral and dextral strike-slip movements. Both the BSF and GF are characterized dominantly by an oblique right-lateral strike-slip movement. The stress indicators show that the maximum horizontal compressional stress was in NNE to NE and NNW-SSE, which is consistent with right-lateral and left-lateral movements of the YSFS, respectively. The plotted structural data show that the NE-SW is the predominant direction of the structural elements. This indicates that the basin and marginal faults are mainly controlled by the right-lateral strike-slip movements of the YSFS. Based on the structural architecture of the Yeonghae basin, the study area represents a contractional zone rather than an extensional zone in the present time. We proposed two models to explain the opening and developing mechanism of the Yeonghae basin. The first model is that the basin developed as an extensional pull-apart basin during the left-lateral movement of the YSF, which has been reactivated by tectonic inversion. In the second model, the basin was developed as an extensional zone at a dilational quadrant of an old tip zone of the northern segment of the YSF during the right-lateral movement stage. Later on, the basin has undergone a shortening stage due to the closing of the East Sea. The second model is supported by the major trend of the collected structural data, indicating predominant right-lateral movement. This study enables us to classify the Yeonghae basin as an inverted strike-slip basin. Moreover, two opposite strike-slip movement senses along the eastern marginal fault indicate multiple deformation stages along the Yangsan fault system developed along the eastern margin of the Korean peninsula.

• 반도체디스플레이기술학회지
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• 제21권3호
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• pp.74-79
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• 2022

In this study, the plasma corrosion resistance and the change in the number of contamination particles generated using the plasma etching process and cleaning process of coating parts for semiconductor plasma etching equipment were investigated. As the coating method, atmospheric plasma spray (APS) was used, and the powder materials were Y₂O₃ and Y₃Al₅O₁₂ (YAG). There was a clear difference in the densities of the coatings due to the difference in solubility due to the melting point of the powdered material. As a plasma environment, a mixed gas of CF₄, O₂, and Ar was used, and the etching process was performed at 200 W for 60 min. After the plasma etching process, a fluorinated film was formed on the surface, and it was confirmed that the plasma resistance was lowered and contaminant particles were generated. We performed a surface cleaning process using piranha solution(H₂SO₄(3):H₂O₂(1)) to remove the defect-causing surface fluorinated film. APS-Y₂O₃ and APS-YAG coatings commonly increased the number of defects (pores, cracks) on the coating surface by plasma etching and cleaning processes. As a result, it was confirmed that the generation of contamination particles increased and the breakdown voltage decreased. In particular, in the case of APS-YAG under the same cleaning process conditions, some of the fluorinated film remained and surface defects increased, which accelerated the increase in the number of contamination particles after cleaning. These results suggest that contaminating particles and the breakdown voltage that causes defects in semiconductor devices can be controlled through the optimization of the APS coating process and cleaning process.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제25권3호
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• pp.163-179
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• 2022

Although functional gastrointestinal disorders (FGIDs) are very common in pediatric patients, there is a scarcity of published epidemiologic data, characteristics, and management patterns from Saudi Arabia, which is the 2nd largest Arabic country in terms of area and the 6th largest Arabic country in terms of population, with 10% of its population aged <5 years. Functional constipation (FC) is an FGID that has shown a rising prevalence among Saudi infants and children in the last few years, which urges us to update our clinical practices. Nine pediatric consultants attended two advisory board meetings to discuss and address current challenges, provide solutions, and reach a Saudi national consensus for the management of pediatric constipation. The pediatric consultants agreed that pediatricians should pay attention to any alarming signs (red flags) found during history taking or physical examinations. They also agreed that the Rome IV criteria are the gold standard for the diagnosis of pediatric FC. Different therapeutic options are available for pediatric patients with FC. Dietary treatment is recommended for infants with constipation for up to six months of age. When non-pharmacological interventions fail to improve FC symptoms, pharmacological treatment with laxatives is indicated. First, the treatment is aimed at disimpaction to remove fecal masses. This is achieved by administering a high dose of oral polyethylene glycol (PEG) or lactulose for a few days. Subsequently, maintenance therapy with PEG should be initiated to prevent the re-accumulation of feces. In addition to PEG, several other options may be used, such as Mg-rich formulas or stimulant laxatives. However, rectal enemas and suppositories are usually reserved for cases that require acute pain relief. In contrast, infant formulas that contain prebiotics or probiotics have not been shown to be effective in infant constipation, while the use of partially hydrolyzed formula is inconclusive. These clinical practice recommendations are intended to be adopted by pediatricians and primary care physicians across Saudi Arabia.

• International Journal of Computer Science & Network Security
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• 제21권11호
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• pp.345-353
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• 2021

Cloud computing represent a new era of computing that's forms through the combination of service-oriented architecture (SOA), Internet and grid computing with virtualization technology. Virtualization is a concept through which every cloud is enable to provide on-demand services to the users. Most IT service provider adopt cloud based services for their users to meet the high demand of computation, as it is most flexible, reliable and scalable technology. Energy based performance tradeoff become the main challenge in cloud computing, as its acceptance and popularity increases day by day. Cloud data centers required a huge amount of power supply to the virtualization of servers for maintain on- demand high computing. High power demand increase the energy cost of service providers as well as it also harm the environment through the emission of CO₂. An optimization of cloud computing based on energy-performance tradeoff is required to obtain the balance between energy saving and QoS (quality of services) policies of cloud. A study about power usage of resources in cloud data centers based on workload assign to them, says that an idle server consume near about 50% of its peak utilization power [1]. Therefore, more number of underutilized servers in any cloud data center is responsible to reduce the energy performance tradeoff. To handle this issue, a lots of research proposed as energy efficient algorithms for minimize the consumption of energy and also maintain the SLA (service level agreement) at a satisfactory level. VM (virtual machine) consolidation is one such technique that ensured about the balance of energy based SLA. In the scope of this paper, we explore reinforcement with fuzzy logic (RFL) for VM consolidation to achieve energy based SLA. In this proposed RFL based active VM consolidation, the primary objective is to manage physical server (PS) nodes in order to avoid over-utilized and under-utilized, and to optimize the placement of VMs. A dynamic threshold (based on RFL) is proposed for over-utilized PS detection. For over-utilized PS, a VM selection policy based on fuzzy logic is proposed, which selects VM for migration to maintain the balance of SLA. Additionally, it incorporate VM placement policy through categorization of non-overutilized servers as- balanced, under-utilized and critical. CloudSim toolkit is used to simulate the proposed work on real-world work load traces of CoMon Project define by PlanetLab. Simulation results shows that the proposed policies is most energy efficient compared to others in terms of reduction in both electricity usage and SLA violation.

• 한국초등과학교육학회지:초등과학교육
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• 제41권1호
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• pp.30-43
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• 2022

이 연구는 초등학생의 과학 수업 대화 및 글쓰기에 구현된 언어 표현의 국어 문법적 특성에 근거하여 그들의 과학적 의사소통 능력의 양상을 조사하였다. Brown et al. (2010)의 증거에 기반한 추론 프레임웍을 순환학습모형에 접목하여 작성한 수업안을 초등학교 5학년을 대상으로 "날씨와 우리 생활" 단원에 적용하였다. 수업 대화에 활발히 참여한 학생 8명의 대화 전사본과 그 학생들의 과학 글쓰기 문장을 연구 자료로 활용하였으며, 텍스트의 내용 및 논리 관계 분석 방법을 적용하여 문법적 특성을 조사하였다. 연구에 참여한 초등학생들은 데이터 분석, 증거 해석, 규칙 적용, 설명 구성 등의 맥락에서 사용되는 과학 언어의 문법적 구조와 일치하지 않는 언어 사용의 양상을 보였다. 그러나 부분적으로 명사화 방식의 문법적 은유를 사용하거나, 적절한 인과 관계의 문법 구조를 사용한 글쓰기 사례도 제시되었다. 교사의 교수법적 안내 발화나 교과서 텍스트의 문법 구조를 통해 학생들이 과학의 문화에서 사용되는 언어 활동의 양태를 경험하면 초등학생도 유사한 과학적 말하기와 글쓰기를 나타낼 수 있었다. 학생들이 증거에 기반한 추론에 근거한 과학지식 구성의 맥락에 적절한 언어 사용 이해와 이에 대한 문식 기능을 습득할 수 있게 하려면, 과학 학습에 관한 언어 사용 모델을 접할 기회를 충분히 제공해 주는 것이 필요함을 논의하였다.

• 한국융합학회논문지
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• 제13권5호
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• pp.287-294
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• 2022

본 연구는 스포츠 현장에서 부상예방으로 많이 사용되고 있는 탄력 테이핑을 슬관절 굴곡과 신전에 적용하여 근력, 근파워, 근지구력에 미치는 영향을 검증하기 위해 진행하였다. 연구 대상자는 슬관절의 굴곡과 신전 운동에 이상이 없는 남자 대학생 10명으로 하였다. 측정방법은 등속성근기능측정 장비를 활용하여 슬관절 굴근과 신근에 키네시오 테이핑을 적용 전, 후로 각속도 60°/sec 5회, 180°/sec 5회, 240°/sec 25회를 측정하였다. 연구결과는 슬관절 신전 시 키네시오 테이핑 적용 전보다 후에 우측 각속도 180°/sec에서 Average Power가 유의하게 증가하였다(p=.010). 슬관절 굴곡 시 키네시오 테이핑 적용 전보다 후에 우측 각속도 180°/sec에서 Average Power가 유의하게 증가하였다(p=.016). 또한 각속도 240°/sec에서는 Total Work Done에서 좌(p=.002), 우(p=.002) 모두 유의하게 증가하였다. 대퇴직근과 대퇴이두근에 키네시오 테이핑 적용이 슬관절 운동 시 근파워과 근지구력을 향상시키는 보조적인 영향이 긍정적으로 나타났다.

• 보존과학회지
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• 제38권4호
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• pp.289-300
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• 2022

In the 6^th and 7^th centuries, 5 iron artifacts excavated form the Baekje Stone Tomb in Guryong-ri site, Ungcheon, Boryeong, were studied. The sample were metal microscopic observation, SEM-EDS analysis and Raman micro-spectroscopy analysis were conducted to understand the metallurgical characteristics. The microstructure observation showed the presence of ferrite and pearlite throughout, and differences in carbon content existed depending on the direction. Non-metallic inclusions were in the form of long lines, and most of them were wüstite, fayalite. It is indicated that the artifacts were forge welded using hypoeutectoid steel, with signs of carburizing and decarburizing processes. Some crystals with high P₂O₅, TiO₂, CaO content were identified as sarcopside, ulvöspinel, and perovskite, respectively, through Raman spectroscopy. A comparison of the results with previous studies on the sites of Bujang-ri site in Seosan and Bongseon-ri site in Seocheon, which are adjacent sites in the coastal area, revealed that, while heat treatment technology was available, the artifacts were not heat-treated considering the purpose for use for these artifacts. The chemical composition of the non-metallic inclusions P₂O₅, TiO₂, CaO were plotted in proportions to SiO₂ and compared with adjacent sites. Considering that the P₂O₅/SiO₂ ratio was widely distributed, the refining technology was not uniform. In addition, the TiO₂/SiO₂ ratio was found to be higher than that of other sites, meaning that a titanium-containing ore was used to manufacture the artifacts, unlike in surrounding sites, but it is not detected in all artifacts, so it may have been affected by various factors such as furnace walls in addition to raw materials. Although slag formers were used, considering the CaO/SiO₂ ratio and the (Al₂O₃/SiO₂)/(CaO/SiO₂) ratio, which appear to be similar to the surrounding sites, but it is possible that CaO containing raw ore was used because it is also affected by the components of raw ore. As a result of the study, it is highly likely that ore different from that of the surrounding sites was used for production, but a more comprehensive comparative study with the surrounding sites is needed in the future.

• 한국심리학회지 : 문화 및 사회문제
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• 제27권4호
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• pp.457-474
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• 2021

본 연구는 집단 갈등에 관한 도구 모델(the Instrumental Model of Group Conflict: Esses, Jackson, & Armstrong, 1998)에 기초하여 가부장적 가정환경과 제로섬 신념 간의 관계를 살펴보고, 가부장적 가정환경과 제로섬 신념의 관계에서 성차별적 인식의 매개효과를 살펴보았다. 또한, 이러한 관계가 성별에 의해 조절되는지도 알아보고, 가부장적 가정환경이 성차별적 인식을 매개로 제로섬 신념에 미치는 영향에서 성별의 조절된 매개효과를 검증하였다. 연구대상자는 이공계 대학생 310명(남자 234명, 여자 76명)으로 이들은 가부장적 가정환경, 성차별적 인식, 제로섬 신념을 측정하는 설문조사에 참여하였다. SPSS Macro Process 프로그램을 이용하여 분석한 결과, 가부장적 가정환경과 제로섬 신념 간의 관계는 성차별적 인식에 의해 완전매개되는 것으로 나타났다. 또한, 가부장적 가정환경과 성차별적 인식의 관계는 성별에 의해 조절되는 것으로 나타났는데, 구체적으로 남성에게서는 가부장적 가정환경이 성차별적 인식에 영향을 주는 것으로 나타났으나, 여성에게서는 이러한 영향이 나타나지 않았다. 마지막으로 남성에게서만 가부장적 가정환경과 제로섬 신념의 관계에서 성차별적 인식의 매개효과가 유의한 것으로 나타났다. 이러한 연구결과는 가부장적 가정환경은 남성의 성차별적 인식을 유발하고, 이러한 성차별적 인식은 제로섬 신념으로 연결될 가능성을 높인다고 볼 수 있다. 즉, 이러한 결과를 통해 남성에게서는 가부장적 가정환경이 성차별적 인식을 통해 제로섬 신념에 영향을 미칠 가능성이 확인되었다고 여겨진다.

• 한국작물학회지
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• 제36권6호
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• pp.554-559
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• 1991

한국의 재래종 옥수수에서 분리 육성한 다얼성 옥수수가 온도의 변화에 따라 분얼성이 어떻게 변하는지를 알고자 온도 조건이 섭씨 15, 20, 25, 3$0^{\circ}C$인 생장부에서 30일간 재배하여 분얼등 몇가지 관련된 특성을 조사하였던 바 그 결과는 다음과 같았다. 1 옥수수의 분얼은 생육초기의 외부 온도에 의하여 크게 영향을 받았다. 즉 온도가 2$0^{\circ}C$일 때 옥수수의 개체당 분얼수는 온도가 15$^{\circ}C$이거나, $25^{\circ}C$일 때 보다 더 많이 분화 발달하였다. 이 같은 온도의 영향은 공시계통이나 교잡종에 따라 차이가 인정되지는 많았다. 2. 생육초기의 온도가 높으면 높을 수록 초장, 엽수, 건물중등은 빠르게 증가하였다. 그러나 이 같은 초장이나 엽수 그리고 건물중의 상승은 분얼성과는 아무런 관련이 없는 것으로 확인되었다 초장, 엽수 그리고 건물중과 같은 특성은 공시계통이나 교잡종에 따라 크게 차이가 있었는데, 교잡종이 자식계통 보다 훨씬 큰 영향을 받았다. 3. 개체당 총 분얼수은 개체당 분얼수가 증가할수록 증가하였다. 4. 초장의 증가는 온도의 상승에 따라 직선적이 아니고 곡선적이었다. 5. 공시 자식계통 가운데서 개체당 분얼수가 많았던 계통은 IK3이었다. 6. 15$^{\circ}C$에서의 발아일수는 7일 이상이었고 3$0^{\circ}C$에서의 발아 일수는 3일 이내로써 공시계통이나 교잡종에 따른 차이는 없었다.

• 한국작물학회지
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• 제33권2호
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• pp.161-168
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• 1988

본 연구는 생태적 생리적 특성이 다른 5가지 콩품종, 즉 조숙성의 예계7003, SS79168 및 만숙성의 동북7006, 백운콩, 장백콩을 공시하여 등숙기간중 체내성분의 변동 즉 식물체 각 기관 전 질소의 경시적 변동과 품종간 차이가 등숙중기 이후의 질소 고정활성의 급속한 감퇴와 어떤 관련성이 있는가를 구명하기 위하여 지상부 및 지하부 각 기관 전질소 농도를 경시적으로 조사함과 아울러 Acetylene 환원능(ARA) 등 조사를 실시하였다. 특히 공시품종중 예계 7003는 노화가 지연되는 특성(delayed leaf senescence, DLS)을 갖는 품종이다. 조사는 Fehr et al.(1977)의 콩생육단계의 구분에 따라서 협신장기(R4), 입비대기(R6), 성숙시기(R7) 등과 일부 품종은 착협시(R3) 및 R4.5, R6.5, R7.5와 같은 중간적 생육단계에도 보족적인 조사를 실시하였는데, 얻어진 결과를 요약하면 다음과 같다. 1. 각기관 질소량과 p-ARA간에는 정의 상관관계가 인정되어 질소고정활성이 높을수록 질소량은 많았다. 2. 각기관 질소농도와 s-ARA간의 상관은 R4에서 정, R6에서 부의 상관을 보였다. 3. s-ARA와 숙주의 Age나 질소 이외의 영양조건 등 영향을 미치는 요인이 많아서, R4에서는 고질소농도가 엽신의 광합성 activity를 높여서 s-ARA에 촉진적으로 작용하였고, R6에서는 엽신의 광합성 activity가 저하하고 질소화합물의 분해가 진행되고 있기 때문에 부의 관계가 인정된 것이라고 판단되었다.