• BMB Reports
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• 제36권5호
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• pp.499-504
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• 2003

There has been increasing interest in studying the various effects of organophosphate insecticides in humans and experimental animals. Only a few data are available on the effect of the organophosphate insecticide, diazinon, on lipid metabolism. The aim of this study was to evaluate the effect of diazinon on plasma lipid constituents in mammalian animals. The plasma levels of total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), triglycerides (TG), and phospholipids (PL) were measured in albino rats that were orally treated with a single dose of diazinon at a level of $LD_{50}$ or with repeated daily doses at the levels of $\frac{1}{2}$, $\frac{1}{8}$, and $\frac{1}{32}$ $LD_{50}$ for 2, 8, and 32 days, respectively. After a 24 h post-treatment with a single $LD_{50}$ dose of diazinon, TC was not significantly changed, the HDL-C and PL levels were significantly decreased, but the LDL-C and TG levels were significantly increased. Separate daily oral administrations of diazinon at $\frac{1}{2}$ $LD_{50}$, $\frac{1}{8}$ $LD_{50}$, and $\frac{1}{32}$ $LD_{50}$ doses resulted in a significant decrease in HDL-C and PL, with no significant change in TG. The LDL-C levels were significantly increased and TC showed no significant change with $\frac{1}{2}$ $LD_{50}$ and $\frac{1}{32}$$LD_{50}$ doses of diazinon, whereas a significant decrease in the levels of TC, HDL-C, as well as LDL-C, was observed with the $\frac{1}{8}$ $LD_{50}$ dose. These data suggest that diazinon may interfere with lipid metabolism in mammals.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 The 6th International Symposium of East Asian Resources Recycling Technology
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• pp.526-531
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• 2001

LD slag, that is, a by-product of steel making process, has been mainly used as land construction materials. Recently, the seashore application of LD slag was tried in Japan and Korea tut the reaction between LD slag and seawater was not studied yet. We tried to clarify the leaching reaction and/or mechanism of LD slag and the reaction between seawater and LD slag. We tried to apply these results to the decarbonization of seawater for seawater magnesia process. At first, LD slag was milled and classified into 5 grades, that is, (ⅰ)45${\mu}{\textrm}{m}$ under, (ⅱ)0.25~0.5mm (ⅲ)0.5~1mm(ⅳ)1~2mm, (ⅴ)2.36~3.35mm. These slags were leached in the distilled water. In case of 45${\mu}{\textrm}{m}$ under, the pH of the leached solution was over 12. The chemical analysis of leached solution showed that the $Ca^{+}$$^2$was main component and the S $i^{+}$$^4$was very low. On the other hand, the content of S $i^{+}$$^4$in leached solution was decreased with the increase of pH of this solution. The nearly pure calcium solution was made and the ultra high purity MgO could be made with this calcium solution. The leaching behavior of LD slag was different between the fine particle and coarse particle. The calcium was leached by bulk dissolution in the coarse particle and by surface controlled reaction in fine particle. The leaching rate was slow in coarse particle and fast in fine particle. Therefore, the high pH solution, that is, over 12, was obtained in fine particle.cle.e.

• 무역상무연구
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• 제17권
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• pp.71-91
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• 2002

The purpose of this paper is to examine the viewpoints of the different legal systems for the validity of LD Clause and the possibility of gap-filling function of UNIDROIT Principles in International Sales Contract. The results of comparative study between common law system and civil law system, and between CISG and UNCDROIT Principles is as follows: First, common law system distinguishes LD Clause and Penalty Clause, but civil law system including Korean law does not strictly distinguish the difference between them, provided that the liquidated damages are not grossly excessive. Second, CISG does not concerned with the validity of LD Clause but entrust this matter to the law applicable by virtue of the rules of private international law; conversely the Principles follow similar position of civil law system. The possibility of gap-filling of the Principles is more positive in the case of arbitration than in the case of litigation. On the basis of above study, I also checked the LD Clauses of ICC Model International Sales and the Model Contracts of Korean Commercial Arbitration Board. The LD Clauses of there two Model Contract seem very appropriate and reasonable for the reference in practical application. The appropriate, not excessive, LD Clause will contribute not only to eliminate the burden of proof for the actual damages, but also to enforce both parties to perform their obligations in their contracts. Therefore, When we make contract, we should keep in our mind to insert the reasonable and appropriate LD Clause in the sales contract. If not, so to speak, litigated damages are grossly excessive, the Clause may be invalid in some legal system.

• 대기
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• 제30권2호
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• pp.195-207
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• 2020

This study aims to introduce the structure of the impact-based heat health warning system on 165 counties in South Korea developed by the National Institute of Meteorological Sciences. This system was developed using the daily maximum perceived temperature (PTmax), which is a human physiology-based thermal comfort index, and the Local ENSemble prediction system for the probability forecasts. Also, A risk matrix proposed by the World Meteorological Organization was employed for the impact-based forecasts of this system. The threshold value of the risk matrix was separately set depending on regions. In this system, the risk level was issued as four levels (GREEN, YELLOW, ORANGE, RED) for first, second, and third forecast lead-day (LD1, LD2, and LD3). The daily risk level issued by the system was evaluated using emergency heat-related patients obtained at six cities, including Seoul, Incheon, Daejeon, Gwangju, Daegu, and Busan, for LD1 to LD3. The high-risks level occurred more consistently in the shorter lead time (LD3 → LD1) and the performance (r_s) was increased from 0.42 (LD3) to 0.45 (LD1) in all cities. Especially, it showed good performance (r_s = 0.51) in July and August, when heat stress is highest in South Korea. From an impact-based forecasting perspective, PTmax is one of the most suitable temperature indicators for issuing the health risk warnings by heat in South Korea.

• 한국전문물리치료학회지
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• 제23권1호
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• pp.72-79
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• 2016

Background: Increased foot pronation causes biomedchanical changes at the lower limbs, which may result in musculoskeletal injuries at the proximal joints. Pronation rear-foot leads to plantar fasciitis, Achilles tendonitis, and posterior tibial tendonitis pathologically. According to the recent meta-analysis, They showed that therapeutic adhesive taping is more effective than foot orthoses and motion control footwear, low-Dye (LD) taping has become the most popular method used by physiotherapists. Objects: The purpose of this study was to determine the immediate effects of LD taping results in different ankle motion and ground reaction force (GRF) as before and after applied LD taping on pronated rear-foot during gait. Methods: Twenty-four participants were recruited for this study. The gait data were recorded using an 8-camera motion capture system and two force platforms. At first, the experiments were carried out that participants walked barefoot without LD taping. And then they walked both feet was applied LD taping. Results: The ankle inversion minimum was significantly greater after LD taping than before LD taping (p=.04); however, in the GRF, there were no significant differences in the inversion maximum or total motion of the stance phase (p=.33, p=.07), or in the vertical (p=.33), posterior (p=.22), and lateral (p=.14) peak forces. Conclusion: The application of taping to pronation rear-foot assists in increased ankle inversion.

• 무역상무연구
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• 제50권
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• pp.3-25
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• 2011

The purpose of this paper is to examine the use of LD Clause against the seller's breach of contract in connection with delivering the goods in the international sales contract, and international guarantee system using standby L/C or demand guarantee. For this purpose, the author, first, considered the outline of the buyer's remedies in cases that the seller had not performed his obligations in contract and the difficulties in the buyer's remedies. As alternatives for overcoming the difficulties, this author recommended the LD Clauses (Liquidated Damage Clauses) based on ICC Model International Sales Contract, and explained each Model Clause. To enhance the feasibility of LD Clause, this author suggested the guarantee system, like the standby L/C or demand guarantee. But these guarantee systems have several limitations in practical use. Thus, these guarantee systems would greatly contribute to Korean exportation in the future. The reason is that the Korean export structure would be more complex and the period of sales contract would be longer and longer, which result to in long-terms supply contracts. These changes would require the guarantee much urgently.

• 전자공학회논문지A
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• 제30A권10호
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• pp.27-32
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• 1993

Separate-confinement hetero-structure (SCH) broad area Laser Diodes (LD's) were fabricated from $Al_{0.07}$Ga$_{0.93}$/. As single-quantum-well (SQW) grown by metal organic chemical vapor deposition (MOCVD). Under pulsed operation, we obtained maximum output powers of about 0.8watt/facet and 1.83watt/facet from LD's with 60$\mu$m and 160$\mu$m channel width, respectively, without facet coatings. The differential quantum efficiency of the 60$\mu$m wide LD was about 21.7%/facet and its threshold current density was about 1k [A/cm$^{2}$]. The differential quantum efficiency of the 160$\mu$m wide LD was about 25.6%/facet and its threshold current density was about 1k[A/cm$^{2}$]. The minimum threshold current density of 60$\mu$m wide LD's was 620[A/cm$^{2}$] when the cavity length was 603$\mu$m and the minimum threshold current density of 160$\mu$m wide Ld's was 675[A/cm$^{2}$] when the cavity length was 752$\mu$m. The internal quantum efficienty and the internal loss of both LD's were 92.3% and 18.1cm$^{1}$, respectively.

• 한국광학회지
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• 제10권2호
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• pp.157-161
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• 1999

실험실에서 제작한 HCP와 IPS를 이용하여 Ti:Sapphire 레이저를 발진시키고 그 특성을 조사하였다. 레이저의 문지방 에너지 1.39kJ로 나타났다. 레이저 효율은 LD-490의 농도 10$\times$10-3Mol/l일 때 가장 높은 효율을 나타내었으며, LD-490의 농도가 낮으면 효율도 감소하는 것으로 나타났다. 레이저의 출력은 5.42 kJ의 입력 에너지에 대해 287mJ이었다. Ar의 방출대와 일치하는 BBQ(bis[2-butyloctyl)oxy]quatephenyl)를 LD-490과 1:1로 혼합하여 에너지 전환제로 사용한 결과 측정한 전구간에 걸쳐 출력 에너지가 증가하였고 문지방 에너지가 LD-490만을 사용할 때 보다 0.22 kJ이 낮아진 1.17 kJ이었다.

• 전자공학회논문지T
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• 제35T권1호
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• pp.120-124
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• 1998

음성 신호의 특성과 LD-CELP 알고리즘의 코드북 인덱스 검색 현황을 조사한 결과, 전 단계에서 검색된 코드북 인덱스가 다음 단계에서도 쓰이게 되는 것을 알 수 있었다. LD-CELP 알고리즘은 음성의 분석 구간을 짧게하여 음성의 명료도가 좋은 편이나, 최적의 코드를 검색하기 위해 많은 계산량이 발생하는 단점이 있다. 본 논문에서는 LD-CELP에서 검색된 코드북 인덱스를 저장하는 검색 메모리를 두어, 코드북의 검색 과정을 일부 생략하는 방법을 제안한다. 이 방법으로 샘플 음성을 시뮬레이션한 결과, 코드북 검색 계산량을 줄여 기존의 LD-CELP 방식보다 코드북 검색 시간을 3.2%-11.7%까지 줄일 수 있었다.

• 한국광학회지
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• 제6권3호
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• pp.228-232
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• 1995

초고속 광통신을 위한 고속변조용 단일모드 반도체 레이저로서 변조 도핑된 SMQW-PBH-DFB-LD를 제작하고 변조특성을 축정 하였다. 제작된 소자의 최소 임계전류는 16.0mA, 최대 slope efficiency는 0.275mW/mA였다. 고속변조를 위한 활성층의 변조도핑으로 소자의 내부손실은 $37cm^{-1}$로 크게 주어졌으나. 이득계수의 증가에 따라 선폭확대계수는 1.8로 감소되었다. 소신호 변조 특성 측정 결과, $46mA(I_{th}+30mA)$ 에서의 공진주파수 8GHz, -3dB 차단주파수 10GHz 이상으로서 고속변조 특성이 우수한 변조도핑된 SMQW-PBH-DFB-LD를 시험 제작하였다.