• Journal of Korean Dental Science
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• 제15권2호
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• pp.101-111
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• 2022

The purpose of laboratory tests in the field of oral medicine can be divided into two categories: (1) medical evaluation of patients with systemic diseases that are planning to receive dental care and (2) diagnosis of patients with certain oral diseases. First, laboratory tests are commonly used to evaluate patients with systemic diseases who need dental management. A combination of multiple tests is usually prescribed as a test panel to diagnose and assess a specific disease. Test panels closely related to oral medicine include those for rheumatoid arthritis, connective tissue disease/lupus, liver function, thyroid screening, anemia, and bleeding disorders. Second, laboratory tests are used as auxiliary diagnostic methods for certain oral diseases. They often provide crucial diagnostic information for infectious diseases caused by bacteria, fungi, and viruses that are associated with pathology in the oral and maxillofacial regions. Laboratory tests for infectious diseases are composed of growth-dependent methods, immunologic assays, and molecular biology. As the field develops, further application of laboratory tests, including synovial fluid analysis in temporomandibular joint disorders, salivary diagnostics, and hematologic biomarkers associated with temporomandibular disorders and orofacial pain conditions, is currently under scrutiny for their reliability as diagnostic tools.

• 한국음향학회지
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• 제41권3호
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• pp.287-301
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• 2022

본 연구의 목적은 현재 음풍경 조사를 위해 사용되는 실험법 중 현장평가와 실험실평가를 비교·분석하는 것이다. 이를 위해 청주시 내 4개 지역에서 현장평가와 실험실평가를 수행하였다. 현장평가에서는 각 측정점을 이용 중이던 65명의 시민이 음풍경 평가에 참여했으며, 실험실평가에서는 20세 이상 건청인 48명이 참여해 녹취한 영상과 소리를 보고 들은 뒤 평가를 진행하였다. 실험실 평가는 현장 경험자와 현장 비경험자로 나누어 실시하였으며, 음원의 청취방법을 달리하여 헤드폰 및 스피커 이용 그룹으로 분류하여 실시하였다. 분석결과, 현장평가와 실험실평가에서 공통적으로 소리의 크기와 불쾌감 사이에 매우 높은 상관관계가 나타났다. 그러나 실험실 평가에서는 시각 및 청각적 정보만으로는 현장의 상황을 정확히 판단할 수 없기 때문에 현장평가와 실험실평가에서 신호음 인식에 대한 차이가 나타났다. 실험실평가에서 헤드폰과 스피커 이용 그룹의 응답결과 중 가장 크게 들리는 신호음의 인지에 차이가 있었다. 또한 현장경험자는 자신이 경험한 기억을 이용하여 신호음을 인지하는 경향이 있는 반면에 현장비경험자는 주 신호음을 인지하지 못하는 경우가 있었다.

• 한국작물학회지
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• 제45권2호
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• pp.103-107
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• 2000

The viviparity of 28 rice varieties was tested at 25 days after heading(DAH), 35DAH, and 45DAH in the laboratory and field condition for 12 days. The incubation temperature was 20/l$0^{\circ}C$ (day/night), 25/15$^{\circ}$C$ and 30/20$^{\circ}$C$ in the laboratory test, and under field water conditions in the field test. The biggest varietal difference of viviparity was found in the laboratory test when examined at 45DAH with the 6-day incubation under 25/15$^{\circ}$C$ . At this conditions the mean viviparous ratio was 32.1 % with the range of 53.9 and the variance of 259.5. In the field test, the significant varietal difference in the viviparity was also found in the lodging treatment at 45 DAH for 6 days. Correlation coefficient analysis between the field and laboratory tests was highly significant from 4 days after incubation at 45 DAH and after 6-day incubation at 35 DAH, and correlation coefficient was higher as incubation days in the laboratory and submerged days under field water became longer. Considering the correlation between the field and laboratory tests, varietal difference of viviparity and convenience of testing, the laboratory test at 45 DAH for 6-day incubation under 25/15$^{\circ}$C$ was the most efficient evaluation method for the viviparity of rice cultivar.

• Journal of Oral Medicine and Pain
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• 제47권4호
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• pp.167-173
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• 2022

Various diseases of the orofacial region that are treated in the field of oral medicine not only are associated with local factors but may also be affected by systemic factors. Knowledge about laboratory medicine is needed to identify the systemic factors that can influence these diseases. Therefore, oral medicine specialists should be able to use diagnostic tests of laboratory medicine and interpret the results in diagnosing and treating diseases in the field of oral medicine. The aim of this article is to examine the diagnostic tests used in laboratory medicine that might be applied to assess the systemic aspect of diseases in the field of oral medicine and to interpret the significance of the findings.

• Geomechanics and Engineering
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• 제23권2호
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• pp.139-149
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• 2020

Piles are widely used in structural foundations of engineering projects. However, the deformation of the soil around the pile caused by driving process has an adverse effect on adjacent existing underground buildings. Many previous studies have addressed related problems in sand and saturated clay. Nevertheless, the failure mechanism of pile driving in unsaturated soil remains scarcely reported, and this issue needs to be studied. In this study, a modeling test system based on particle image velocimetry (PIV) was developed for studying deformation characteristics of pile driving in unsaturated silt with different water contents. Meanwhile, a series of direct shear tests and soil-water characteristic curve (SWCC) tests also were conducted. The test results show that the displacement field shows an apparent squeezing effect under the pile end. The installation pressure and displacement field characteristics are sensitive to the water content. The installation pressure is the largest and the total displacement field is the smallest, for specimens compacted at water content of 11.5%. These observations can be reasonably interpreted according to the relevant unsaturated silt theory derived from SWCC tests and direct shear tests. The variation characteristics of the soil displacement field reflect the macroscopic mechanical properties of the soil around the pile.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 춘계 학술발표회 초청강연 및 논문집
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• pp.442-451
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• 2008

The evaluation of field degree of consolidation on soft clays has been an important problem in geotechnical areas. Monitoring either settlements or pore water pressures has been widely applied in the filed, but occasionally they have some problems. This study addresses the suggestion and application of another method for evaluating the degree of consolidation using shear wave velocities. A research site where soft clay layers were consolidated by surcharging loads was chosen. Laboratory tests were performed to determine the relation between shear wave velocity and effective stress. Field seismic tests were conducted several times during the consolidation of the clay layers. The tests results show that the shear wave velocity increased significantly as clays consolidated. The shear wave velocities at each field stress states were derived from the laboratory results and the degree of consolidation was evaluated by comparing the shear wave velocities obtained by laboratory and field seismic methods. In most stress states, the degree of consolidation evaluated using the shear wave velocity matched well with that obtained from field settlement record, showing the potential of applying the method using shear waves in the evaluation of field degree of consolidation on soft clay deposits.

• 한국지반환경공학회 논문집
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• 제14권1호
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• pp.61-68
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• 2013

본 연구에서는 지반보강재로서 폐타이어 사용에 따른 환경영향을 평가하기 위하여 실내실험 및 현장시험시공을 수행하였다. 실내실험을 통하여 폐타이어의 용출특성에 가장 큰 영향을 미치는 폐타이어의 입경과 배수조건을 변화시켜가며 유출수의 pH, 탁도, TOC, Zn 농도를 분석하였다. 또한, 현장시험시공을 통하여 폐타이어를 이용한 보강토 옹벽 시공 후 하부 집수정의 수질을 분석하였다. 입경에 따른 용출실험 결과 폐타이어 입경이 증가할수록 용출농도가 감소하는 것을 확인할 수 있었으며, 이는 비표면적의 차이 때문으로 판단된다. 배수조건에 따른 용출실험 결과 배수조건인 경우 시간이 경과할수록 용출농도가 감소하여 주변 환경에 큰 영향을 미치지 않을 것으로 판단되나, 비배수 조건인 경우 시간이 경과할수록 용출농도가 증가하는 현상을 발견할 수 있었다. 1년간의 현장모니터링 결과 폐타이어로 보강된 옹벽으로부터 발생되는 침출수는 전반적으로 용출농도가 높지 않은 것으로 나타났으며, 침출수 발생 초기에 농도가 증가하다가 이후 점점 감소하여 원수인 우수와 비슷해지는 경향을 나타내었다. 따라서 폐타이어를 지반보강재로 사용함에 따라 발생하는 환경적 영향은 무시할 수 있는 수준임을 알 수 있었다.

• 한국방재학회 논문집
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• 제9권1호
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• pp.33-40
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• 2009

입상재료를 이용한 도로의 시공은 주로 다짐을 이용한다. 다짐으로 인한 효과는 흙의 강도증진, 압축변형감소, 투수계수감소등이 있다. 현재 사용하는 다짐은 주로 프록터 다짐기를 이용한 표준 및 수정다짐방법을 이용한다. 프록터 다짐기는 주로 충격에너지를 이용하여 다짐효과를 구현하는데, 이는 현장의 다짐기기에 의한 다짐조건과 상이하며, 최대건조밀도를 맞추는데 상당한 어려움이 있다. 이러한 문제를 해결하기 위하여 선회다짐기를 이용한 흙의 다짐평가를 시행하였다. 본 연구의 목적은 현장다짐장비의 조사, 실내다짐방법의 다짐특성 평가, 현장다짐특성을 평가하여, 선회다짐기를 이용한 새로운 다짐평가방법을 제시하고자 한다.

• 터널과지하공간
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• 제25권6호
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• pp.505-514
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• 2015

본 연구에서는 기존 오염토양 안정화처리 시공방법의 문제점에 대한 해결을 위하여 개발한 혼합포설방식 안정화장비의 현장 적용성 및 시공성을 현장실증시험 및 실내시험을 통하여 검증하였다. 현장 실증시험을 통하여 안정화장비의 현장 적용성을 확인하였으며, 현장 교반토의 석회석 분포 및 CaO 함량 분석 등의 실내시험을 통하여 기존 오염토양 안정화처리 시공방법에 비해 개발된 안정화장비 시공방법의 안정화제 교반성이 더 우수한 것을 확인하였다.

• Mycobiology
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• 제30권1호
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• pp.37-40
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• 2002

The susceptibility of radiata pine sapwood to fungal attack and the ability of selected fungicides to control colonization of sapstain and mold fungi on green radiata pine sapwood were evaluated. Radiata pine sapwood was highly susceptible to fungal staining, suggesting that prompt application of fungicides after sawing is essential for preventing fungal colonization. The ability of commercial fungicides to prevent fungal discoloration on radiata pine sapwood was assessed using an accelerated 6-week test on small samples in the laboratory, and in field tests using bulk-piled boards exposed outdoors for 6 weeks during summer rainy season. In laboratory tests, Hylite extra provided excellent protection against fungal discoloration even at the lowest concentrations. Hylite clear, Britewood S, and NP-1 Plus provided good short-term protection(2 to 4 weeks), but higher chemical loadings were, required for long-term protection(6 weeks). Woodguard produced little or no protection over the test periods. In field tests, Kathon 893 provided markedly superior protection at the concentration of 0.5 percent or higher. NP-1 Plus provided relatively good protection at all concentrations evaluated. Hylite extra was effective only for short-term protection(2 to 4 weeks) at all concentrations tested, but higher solution strengths were needed for longterm protection.