• 한국임상수의학회지
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• 제25권6호
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• pp.545-548
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• 2008

A 3-year-old castrated male Siberian husky was presented for evaluation after being hit by a car. On physical examination, the dog showed open-mouth, displacement of mandible and hypersalivation with blood ting. The base of tongue was transected almost 80% on the bias from right dorsal side to the left ventral side. Radiography demonstrated separation of mandible symphysis, and fracture of right condyle and vertical ramus. After debridement of the necrotic tissue, tongue apposition with simple interrupted suture was performed. Mandibular symphysis, condyle and mandibular vertical ramus fractures were fixed using pin, cerclage wire, T-plate, and K-wires. The mouth was irrigated daily using chlorhexidine after surgery. The sutures that were loose here or untied at tongue were re-sutured under sedation. The transected tongue was healed and recovered its normal movement after 6 weeks.

• 한국식물병리학회지
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• 제14권2호
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• pp.164-170
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• 1998

This study was carried out to develop DNA probe for specific detection of Erwinia carotovora subsp. carotovora. Universal rice primer (URP, 20 mer) developed from repetitive sequence of rice was applied for producing PCR DNA fingerprints of Erwinis spp. In E. carotovora subsp. carotovora strains, primer URP2F amplyfied polymorphic bands which are distinguisable from other Erwinia spp. A PCR band of 0.6 kb selected from PCr polymorphic bands of E. carotovora subsp. carotovora strains was cloned and evaluated as a diagnostic DNA probe. Among 28 bacterial strains including 22 Erwinia spp, the probe (pECC2F) only hybridized to total DNAs from e. carotovora subsp. carotovora strains and E. carotovora subsp. wasabiae, but sizes of hybridized bands were different between these subspecies, 10.0 kb and 3.5 kb respectively. In dot blot assays using probe pECC2F, as few as 103 colony forming units (CFU) of E. carotovora subsp. carotovora could be detected in a suspension containing about 1$\times$103 CFU of soil bacteria.

• Journal of Smart Tourism
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• 제1권2호
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• pp.3-12
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• 2021

The interaction between technology and tourism has been a dynamic research area recently. This study aims to review the progress and development of technology in tourism research via a bibliometric analysis. We derive the source data from the Web of Science (WoS) core collection and use CiteSpace for bibliometric analysis, including countries, institutions, authors, categories, references, and keywords. The analysis results are as follows: i) The number of published articles on the role of technology in tourism has increased in recent years. ii) Technology-related articles in tourism are abundant in Tourism Management, Journal of Travel Research, and Annals of Tourism Research. iii) The countries with the most contributions are China, the US, and the UK. The most active institutions are the Hong Kong Polytechnic University, University of Central Florida, Bournemouth University, University of Queensland, and Kyung Hee University. iv) The reference analysis results identify eight extensively researched topics from the most cited papers, and the keyword burst analysis results present an emerging trend. This study identifies the effect and development of technology in tourism research. Our findings provide implications for researchers about the current research focus of technology and the future research trend of technology in the tourism field.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권5호
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• pp.1489-1515
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• 2022

The number of interconnected real-world devices such as sensors, actuators, and physical devices has increased with the advancement of technology. Due to this advancement, users face difficulties searching for the location of these devices, and the central issue is the findability of Things. In the WoT environment, keyword-based and geospatial searching approaches are used to locate these devices anywhere and on the web interface. A few static methods of indexing and ranking are discussed in the literature, but they are not suitable for finding devices dynamically. The authors have proposed a mechanism for dynamic and efficient searching of the devices in this paper. Indexing and ranking approaches can improve dynamic searching in different ways. The present paper has focused on indexing for improving dynamic searching and has indexed the Things Description in Solr. This paper presents the Things Description according to the model of W3C JSON-LD along with the open-access APIs. Search efficiency can be analyzed with query response timings, and the accuracy of response timings is critical for search results. Therefore, in this paper, the authors have evaluated their approach by analyzing the search query response timings and the accuracy of their search results. This study utilized different indexing approaches such as key-words-based, spatial, and hybrid. Results indicate that response time and accuracy are better with the hybrid approach than with keyword-based and spatial indexing approaches.

• 한국강구조학회 논문집
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• 제15권2호
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• pp.125-135
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• 2003

BEF유사법과 Ritz의 방법을 이용한 매개변수 해석과 유사한 결과를 보이는 격벽이 없는 직선 및 곡선 강상자형 교의 3차원 모델을 구현하였고, 여기에 격벽을 추가하여 A-10, A-20, A-30, B-10, B-20, B-30모델에 대한 격벽의 적정 간격을 산정하였다. 그 결과 지간 50m의 곡선 강상자형교의 적정 격벽수는 전술한 모델의 순서대로 5개(8.3m), 7개(6.25m), 8개(5.5m), 4개(10m), 6개(7.1m), 7개(6.25m)이다. 또한 3차원 유한요소 모델을 해석한 결과를 바탕으로 뒤틀림응력과 휨응력의 비를 계산하는 수식을 제안하였다.

• 한국세라믹학회지
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• 제55권4호
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• pp.364-367
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• 2018

The phase evolution, microstructure, and microwave dielectric properties of Sr-substituted $Ba(Mg_{0.5}W_{0.5})O_3$ ceramics, i.e., $(Ba_{1-x}Sr_x)(Mg_{0.5}W_{0.5})O_3$ ($0{\leq}x{\leq}0.30$), sintered at $1700^{\circ}C$ for 1 h were investigated. All compositions showed a 1 : 1 ordered perovskite structure. In all the compositions, $BaWO_4$ was detected as the secondary phase. With increasing x in ($Ba_{1-x}Sr_x$) $(Mg_{0.5}W_{0.5})O_3$, the lattice parameter increased linearly, indicating that a substitutional solid solution occurred. All compositions exhibited a dense microstructure. The value of ${\varepsilon}_r$ increased slightly with increasing x. The value of $Q{\times}f_0$ increased with the increase in x up to x = 0.10 and reached a saturated value of about 100,000 GHz. The composition for x = 0.20, i.e., $(Ba_{0.80}Sr_{0.20})(Mg_{0.5}W_{0.5})O_3$, sintered at $1700^{\circ}C$ for 1 h exhibited superior microwave dielectric properties of ${\varepsilon}_r=19.6$, $Q{\times}f_0=99,358GHz$, and ${\tau}_f=0.0ppm/^{\circ}C$, respectively.

• 한국공간구조학회논문집
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• 제9권3호
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• pp.59-66
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• 2009

구조물이 건전한 상태에서 진동계측을 통한 고유진동수와 감쇠율과 같은 동적특성의 분석에 대하여 국내 외적으로 많은 연구가 진행되어 왔다. 그러나 실물 구조물에 대하여 파괴 직전까지의 큰 손상 후에 진동계측을 통한 동적특성에 대한 연구는 상대적으로 매우 미약한 실정이다. 따라서 본 연구는 3층 철근콘크리트조 건물에 엑츄에이터로 하중을 주어 건물에 손상을 준 후에 손상 전 후의 진동계측을 통하여 동적특성을 파악하였다. 손상 전 후에 대한 고유진동수 및 감쇠율을 산정하였으며, 이 결과를 국외의 기존 연구와 비교하였다. 상시진동계측 및 인력가진을 통한 계측방법을 실시하였으며, 계측 전에 고유치 해석을 선행하여 계측치와 비교분석을 하였다. 120mm의 수평변위를 준 결과 구조물의 파괴 직전 손상 전 후에 장변과 단변의 고유진동수는 각각 34.3%, 33.7% 감소하였고, 감쇠율은 각각 36.5%, 19.5% 감소하였다. 기존 국외의 연구결과와의 비교를 한 결과 고층형 건물보다 강성의 변화가 크게 감소됨을 확인할 수 있었으며, 저층형 구조물에 대한 안정성 검토가 시급함을 확인할 수 있다.

• 한국재료학회:학술대회논문집
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• 한국재료학회 2011년도 추계학술발표대회
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• pp.29.1-29.1
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• 2011

The selective catalytic reduction (SCR) of $MnO_x$ with $NH_3$ is an effective method for the removal of $MnO_x$ from stationary system. The typical catalyst for this method is $V_2O_5-WO_3(MoO_3)/TiO_2$, caused by the high activity and stability. However, This catalyst is active within $300{\sim}400^{\circ}C$ and occurs the pore plugging from the deposition of ammonium sulfate salts on the catalysts surface. It needs to locate the SCR unit after the desulfurizer and electrostatic precipitator without reheating of the flue gas as well as deposition of dust on the catalyst. The manganese oxides supported on titania catalysts have attracted interest because of its high SCR activity at low temperature. The catalytic activity of $MnO_x/TiO_2$ SCR catalyst with different manganese precursors have investigated for low-temperature SCR in terms of structural, morphological, and physico-chemical analyses. The $MnO_x/TiO_2$ were prepared from three different precursors such as manganese nitrate, manganese acetate (II), and manganese acetate (III) by the sol-gel method and then it calcinated at $500^{\circ}C$ for 2 hr. The structural analysis was carried out to identify the phase transition and the change intensity of catalytic activity by various manganese precursors was analyzed by FT-IR and Raman spectroscopy. These different precursors also led to various surface Mn concentrations indicated by SEM. The Mn acetate (III) tends to be more suppressive the crystalline phase (rutile), and it has not only smaller particle size, but also better distributed than the others. It was confirmed that the catalytic activity of MA (III)-$MnO_x/TiO_2$ was the highest among them.

• 한국세라믹학회지
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• 제53권5호
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• pp.568-573
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• 2016

We explore the crystalline structure and phase transition of lithium thiophosphate ($Li_7P_3S_{11}$) solid electrolyte using electron microscopy and X-ray diffraction. The glass-like $Li_7P_3S_{11}$ powder is prepared by the high-energy mechanical milling process. According to the energy dispersive X-ray spectroscopy (EDS) and selected area diffraction (SAD) analysis, the glass powder shows chemical homogeneity without noticeable contrast variation at any specific spot in the specimen and amorphous SAD ring patterns. Upon heating up to $260^{\circ}C$ the glass $Li_7P_3S_{11}$ powder becomes crystallized, clearly representing crystal plane diffraction contrast in the high-resolution transmission electron microscopy image. We further confirm that each diffraction spot precisely corresponds to the diffraction from a particular $Li_7P_3S_{11}$ crystallographic structure, which is also in good agreement with the previous X-ray diffraction results. We expect that the microscopic analysis with EDS and SAD patterns would permit a new approach to study in the atomic scale of other lithium ion conducting sulfides.

• 한국분말재료학회지
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• 제11권3호
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• pp.253-258
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• 2004

We report a carbothermal reduction process for massive synthesis of monolithic W$_{18}$O$_{49}$ phase from tungsten oxide in the presence of carbon source. Carbon black powder was used as a carbon source and added to WO$_3$ by 40 weight percent. Bundles of W$_{18}$O$_{49}$ rods were formed over the temperature range of 80$0^{\circ}C$$^{\circ}C$ to 90$0^{\circ}C$. Pure W$_{18}$O$_{49}$ bundles could be separated from the mixture of W$_{18}$O$_{49}$ and residual carbon black powder. Field emission character of W$_{18}$O$_{49}$ phase was determined using the extracted W$_{18}$O$_{49}$ rods. Flat lamp fabricated from the W$_{18}$O$_{49}$ rods showed the turn-on field of 9.3 V/${\mu}m$.