• Korean journal of applied entomology
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• v.43 no.3 s.136
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• pp.241-247
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• 2004

Susceptibility of Blattella germanica male adults to 61 commercial insecticides was evaluated by diet dipping method. Among them three insecticides of dichlorvos, fenitrothion, and fipronil showed over $90\%$ mortality. The insect was more susceptible to dichlorvos and fenitrothion in filter paper contact method than in diet dipping one, but fipronil was vice versa. Toxicities of the three chemicals were evaluated by application parts of the such as head, thorax, abdomen, and legs. Dichlorvos and fenitrothion were more toxic when applied to head, and flpronil was thorax. $LT_{50}$ values by diet dipping method showed that fenitrothion and fipronil acted more rapidly than boric acid and hydramethylnon. The values of the former two were 1.05 and 0.98 days, and those of the latter two were 3.92 and 2.26 days, respectively.

• The Korean Journal of Pesticide Science
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• v.8 no.3
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• pp.210-219
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• 2004

Susceptibility of Periplaneta americana male adults to 61 commercial insecticides was evaluated by diet dipping method. Among them eight insecticides of dichlorvos, benfuracarb, cypermethrin, deltamethrin, fenpropathrin, $\zeta$-cypermethrin, $\lambda$-cyhalothrin and fipronil showed 100% mortality. The insect was more susceptible to dichlorvos and fenpropathrin in filter paper contact method than in diet dipping one, but benfuracarb was vice versa. Toxicities of the seven chemicals were evaluated by application parts of the such as head, thorax, abdomen, and legs. Dichlorvos, benfuracarb and $\lambda$-cyhalothrin were more toxic when applied to head, and deltamethrin, fenpropathrin and cypermethrin were abdomen. $LT_{50}$ values by diet dipping method showed that dichlorvos, benfuracarb and $\lambda$-cyhalothrin acted more rapidly than boric acid and hydramethylnon. The values of the former three were 0.10, 0.29 and 0.12 days, and those of the latter two were 6.2 and 4.8 days, respectively.

• Journal of the Korean Society for Precision Engineering
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• v.9 no.3
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• pp.165-171
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• 1992

진동하는 구조물을 설계할 때에는 그 구조물 중의 Strain이나 응력이 최대가 되는 장소나 시각을 알 필요가 있다. 지금까지의 Strain 해석에는 Strain gauge 등과 같은 접촉법이 많이 이용되고 있다. 더우기, 접촉법으로 대변형 진동을 하는 물체의 Strain을 해석하는 것은 곤란하다. 최근에는 비접촉법으로 Strain 분포를 해석하기 위해 화상처리를 이용한 계측이 행하여지고 있다. 이들의 Strain 분포를 측정하는 광학적인 방법으로는 격자법, Moire법, 홀로 그랩픽 간섭법 등이 있다. 특히 대변형이나 대Strain을 해석하는 데에는 격자법이 많이 이용되고 있는데, 종래의 격자법은 Data를 처리하는 데에 많은 시간과 노력이 소요되고 작업도 매우 복잡하며, Data의 수도 제한이 되어서 구조물의 분포의 해석 정도에 큰 영향을 미치게 된다. 본 논문 에서는 스테레오법을 이용해서 2차원 격자를 붙인 시료표면의 각 점의 3차원 좌표를 계측하고, 또 Fourier 변환 격자법을 적용하여 촬영된 2차원 격자의 화상에서 위상치를 구한다. 그리고 물체의 변형 전후의 대응 관계의 화상에서 3차원 형상과 Strain 분포를 해석하는 방법을 제안한다. 이 방법을 이용하면 진동하는 구조 물의 3차원 변위분포, Strain 분포를 정도 좋게 해석할 수가 있다.

• Korean Journal of Soil Science and Fertilizer
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• v.39 no.6
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• pp.392-395
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• 2006

The toxic effects of 9 commercially available herbicides on the earthworm, Eisenia fetida (Savigny) were evaluated with recommended dose, 2-fold and 4-fold dose using soil surface spray, immersion and contact filter tests in order to find out whether herbicides actually influence the life of earthworm in the soil or not. In the surface sprayed soil test, the earthworm mortality to nine herbicides were not significantly different from the comparison with the control regardless of level of dose. In the immersion test, the mortality of 4-fold dose was 34% in the napropamide and 64% in the alachlor. In contact filter test, the mortality appeared 80% in alachlor, 37% in napropamide, and 10% in triclopyr at 2-fold dose level and those of 4-fold dose were as follows: napropamide 96%, alachlor 80%, glyphosate 47%, triclopyr 37%, paraquatdichloride 37%; glufosinate ammonium 33%, pyributicarb 10%. As a result of these tests by three methods, the mortality of earthworm in terms of the recommended dose level was no observation about eight herbicides while the napropamide appeared 33% in contact filter test.

• Korean journal of applied entomology
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• v.35 no.2
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• pp.153-158
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• 1996

Methanol extracts from 79 domestic plant species in 41 families and the crude oil of one Japanese plant species were tested for their larvicidal activities against Thecodiplosis japonensis Uchida et Inouye, using filter paperimpregnated and insect-dipping methods. In a test with 10 mgtpaper, strong larvicidal activity (>90% mortality) was obtained from the extracts of roots from three domestic plants belonging to Ranunculaceae (Aconitum pseudo- leave var. eretum, A. carmichaeli and Clematis florida) and the crude oil of sawdust from a Japanese plant, Thujopsis dolabrata var. hondai (Cupressaceae). However, only the crude oil from the Thujopsis sawdust revealed strong larvicidal activity when tested with 5,000 ppm by insect-dipping method. It is concluded that the Thujopsis sawdust-derived materials could be useful as a new control agent against T. japonensis.

• Korean Journal of Soil Science and Fertilizer
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• v.39 no.5
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• pp.280-284
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• 2006

The toxic effects of 14 commercially available fungicides on the earthworm, Eisenia fetida (Savigny), were evaluated using surface sprayed soil, immersion and contact filter tests. At recommended dose, the earthworm mortality is 4% on mancozeb, carbendazim, propineb and captan in the surface sprayed soil test, 4% on mancozeb, 6% on propineb and 10% on captan in the immersion test, and no effect on all used chemicals in contact filter test.

• Journal of the Korea Organic Resources Recycling Association
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• v.20 no.1
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• pp.50-60
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• 2012

This study was carried out to evaluate the ecotoxicological effects of Alum and Ferric chloride on the population of Eisenia fetida in vermicomposting of sewage sludge. Using contact filter toxicity test, it was shown that LC50 of Alum and Ferric chloride on adult Eisenia fetida were 457.4 mg $kg^{-1}$ and 1,665.2 mg $kg^{-1}$, respectively,which meant Ferric chloride had much higher acute toxicity on earthworm than Alum. Alum didn't affect on cocoon production, hatchability and number of hatched larvae of Eisenia fetida. Ferric chloride didn't have any efects on number of hatched larvae per cocoon, but reduced cocoon production and hatchability. Larval density of next generation was reduced by the food containing Alum and Ferric chloride. Above results indicated that the Alum and Ferric chloride could be one of the hazardous materials that made extinction of earthworm population when the sewage sludge treated with Alum and Ferric chloride was supplied to the earthworms.

• 한국방재학회:학술대회논문집
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• 2011.02a
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• pp.89-89
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• 2011

도로의 가드레일 지주 근입깊이의 부족에 의한 자동차의 전락사고 이 후, 일본의 국토교통성 등의 관계자들이 그 대책 세우기에 부심해 왔으나, 기설 지주의 근입깊이를 측정할 수 있는 방법은 아직까지 알려져 있지 않으며, 현재로서는 작업의 전 과정을 비디오로 촬영하여 그 기록을 남기도록 되어있다. 그러나 그것은 상당히 비효율적인 작업으로 엄밀한 감시기능을 다하지 못하고 있으며, 감독자와 시공자의 양자로부터 계측 도구의 개발이 절실히 요구되고 있다. 일부의 초음파 측정기 업자가 가드레일 지주의 근입깊이를 측정할 수 있다고 주장하고 있으나, 시장에는 아직 나타나지 않고 있으며, 그 측정시스템의 측정여부와 성능의 검증이 이루어지지 않고 있는 상황이다. 지금까지 충격탄성파법 또는 초음파법을 이용하여, 매설된 가드레일 지주의 근입깊이를 측정한 성공사례가 정식으로 보고된 바는 없으며, 같은 강관주인 눈사태 방지책의 지주 파이프에 대한 근입깊이의 측정은 본 연구그룹의 의해 행하여진 바가 있다. 검사봉이나 해머 등으로 대상물을 두드려서 탄성파를 발생시키고, 그것을 가속도계 또는 속도계의 진동센서로 감지하여 그 파형을 분석함으로써 대상물의 치수 등을 측정하는 충격탄성파법은, 특히 콘크리트를 대상으로 공동 및 매설물 등의 탐사, 균열깊이의 측정 등에 폭 넓게 사용되고 있다. 하지만 이 측정방법을 가드레일의 지주의 근입깊이 측정에 적용할 경우, 일반적으로 행하여지는 방법, 즉 진동센서를 대상물의 상단부(캡)에 설치하는 방법으로는 접합부에 의한 탄성파의 손실과 캡의 휨 진동에 의한 노이즈 등을 해결하기가 곤란해진다. 또한 지반의 존재로 인한 진동 모드의 변화와 진동에너지의 감소 등의 문제점을 해결하지 않으면 안 된다. 본 연구는 충격탄성파법을 이용하여 지반에 설치된 눈사태 방지책이나 가드레일의 지주와 같은 강관 구조물의 근입깊이를 측정하고자 하는 연구이다. 이를 위해 진동센서를 캡이 아닌 측면부에 취부장치를 이용하여 설치함으로써 길이방향의 탄성파를 측정할 수 있도록 하고, 실제 구조물에 대해 측정을 실시하여 그 측정시스템의 성능과 유용성을 검토하고자 한다. 또한 다양한 길이의 실험용 강관 파이프를 매설하고 측정실험을 실시하여 측정시스템의 적용성에 대해서도 검토하였다. 본 연구를 통하여, 수신센서를 파이프의 측면에 선접촉하게 함으로서 종파를 감지하여 근입깊이를 포함한 파이프의 전 길이를 측정하는 본 측정시스템은 매설된 강관 구조물의 길이 측정에 기본적으로 적용 가능함을 확인할 수 있었다. 특히 오거 굴착으로 시공된 경우에는 높은 정도의 측정성능을 보여주었다. 또한 항타관입 파이프에 대해서는 지반의 영향을 고려함으로써 길이의 측정이 가능하다는 것을 확인할 수 있었다. 즉, 오거 굴착 또는 항타 관입 등 시공방법에 따라 측정결과에 대한 지반의 영향 정도가 달라지며 파형 분석 및 길이 산정시 그 영향을 고려하여야 함을 확인하였다.

• The Korean Society of Law and Medicine
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• v.23 no.3
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• pp.3-44
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• 2022

As a result of a close review focusing on the case of obstruction of epidemiological investigation by a religious group A in Daegu, which was a problem when the pandemic of Covid-19 infection began in Korea around February 2, 2020, when an epidemiological investigator requested a specific group to submit a list, While there have been cases where an act of not responding or submitting an edited omission list was sentenced to the effect that the act did not fall under an epidemiological investigation, in the case of non-submission of the visitor list for the B Center, even though a 'list of visitors' was requested. Regarding the fact of refusal without a justifiable reason, 'providing a list of persons entering the building is a key factual act that forms a link between epidemiological investigations accompanying an epidemiological investigation, and refusing to do so is also an act of refusal and obstruction of an epidemiological investigation. There are cases where it is possible to demand criminal punishment. Regardless of whether the request for submission of the membership list falls under the epidemiological investigation, there are cases in which the someones' actions correspond to the refusal or obstruction of the epidemiological investigation. A lower court ruling that if an epidemiological investigation is rejected or obstructed as a result of interfering with factual acts accompanying an epidemiological investigation, comprehensively considering whether or not the list has been diverted for purposes other than epidemiological investigation, the logic is persuasive. Epidemiological investigations such as surveys and human specimen collection and testing are conducted for each infectious disease patient or contact confirmed as a result of the epidemiological investigation, but epidemiological investigations conducted on individual individuals cannot exist independently of each other, and the This is because the process of identification and tracking is essential to an epidemiological investigation, and if someone intentionally interferes with or rejects the process of confirming this link, it will result in direct, realistic, and widespread interference with the epidemiological investigation. In this article, ① there are differences between an epidemiological investigation and a request for information provision under the Infectious Disease Control and Prevention Act, but there are areas that fall under the epidemiological investigation even in the case of a request for information, ② Considering the medical characteristics of COVID-19 and the continuity of the epidemiological investigation, the epidemiological investigator the fact that the act of requesting a list may fall under the epidemiological investigation, ③ that the offense of obstructing the epidemiological investigation in certain cases may constitute 'obstruction of Performance of Official Duties by Fraudulent Means', and ④ rejecting the request for information provision under the Infectious Disease Control and Prevention Act from September 29, 2020 In this case, it is intended to be helpful in the application of the Infectious Disease control and Prevention Act and the practical operation of epidemiological investigations in the future by pointing out the fact that a new punishment regulation of imprisonment or fine is being implemented.