• Asian-Australasian Journal of Animal Sciences
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• 제28권1호
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• pp.79-85
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• 2015

One-day-old Cherry valley meat-strain ducks were used to investigate the effect of supplemental dried oregano powder (DOP) in feed on the productivity, antioxidant enzyme activity, and breast meat quality. One hundred sixty five ducks were assigned to 5 dietary treatments for 42 days. The dietary treatment groups were control group (CON; no antibiotic, no DOP), antibiotic group (ANT; CON+0.1% Patrol), 0.1% DOP (CON+0.1% DOP), 0.5% DOP (CON+0.5% DOP), and 1.0% DOP (CON+1.0% DOP). Upon feeding, 1,1-diphenyl-2-picryl-hydrazyl (DPPH) radical scavenging activity of oregano extracts was higher than that of tocopherol, although it was less than that of ascorbic acid. As a result of in vivo study, DOP in the diet showed no effects on final body weight, feed intake, or feed conversion ratio. However, dietary 0.5% and 1% DOP supplementation caused a significant increase in the serum enzyme activity of superoxide dismutase (SOD) compared with CON and ANT, while glutathione peroxidase (GPx) in tissue was increased as compared to ANT (p<0.05). Cooking loss from ducks fed with DOP decreased compared with the control ducks. Thiobarbituric acid reactive substance (TBARS) values of duck breast meat at 5 d post slaughter was found to be significantly reduced in ducks whose diets were supplemented with 0.5% and 1% DOP (p<0.05). These results suggest that diets containing 0.5% and 1% DOP may beneficially affect antioxidant enzyme activity of GPx and SOD, improve meat cooking loss, and reduce TBARS values in breast meat at 5 d of storage in ducks.

• 제어로봇시스템학회논문지
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• 제6권10호
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• pp.923-927
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• 2000

This paper presents a relationship between DOP for TOA and TDOA is defined using the error covariance matrix of TDOA. It is analytically shown that the error ellipsoid of TOA is as same as that of TDOA in magnitude and in orientation, which means that DOP for TOA is identical to the DOP for TDOA. By computer simulation, the positioning performance of two methods is compared, and we verify our assertion.

• 한국위성정보통신학회논문지
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• 제8권1호
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• pp.40-44
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• 2013

본 논문에서는 지상용 GPS(Global Positioning System)와 유사한 GBAS(Ground Based Augmentation Systems)의 위치측정오차에 대해서 연구하였다. GBAS의 위치측정오차에 영향을 주는 요소는 많이 있으며 측위오차(DOP: Dilution Of Precision)도 그 중의 하나이다. 측위오차는 송신기와 수신기의 수와 기하학적 배치위치에 따라서 결정된다. 본 연구에서는 한반도 지형에 2-열로 송신기를 배치하고 수신기의 위치에 따른 고도별 DOP를 예측할 수 있는 알고리즘을 개발하였다. 본 논문은 송신기와 수신기가 배치된 3차원 공간의 DOP를 정확하게 예측할 수 있어서 항법시스템에 매우 유용하게 사용될 수 있을 것으로 판단된다.

• 한국정보과학회논문지:시스템및이론
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• 제36권2호
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• pp.111-123
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• 2009

본 논문에서는 두 개의 이차원 볼록 다각형간의 Hausdorff 거리를 계산하는 효율적인 알고리즘을 제안한다. 볼록 다각형을 k-DOP으로 바운딩하고, k-DOP의 방향성과 계층적인 특성에 따라 관심영역만을 추적하는 방법으로, 본 논문에서 제안하는 알고리즘은 평균적으로 O(logn)시간에 수행되며, 최악의 경우에도 O(n)의 수행성능을 보인다.

• Journal of Electrical Engineering and Technology
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• 제11권3호
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• pp.746-750
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• 2016

Dilution of Precision (DOP), as a measure of positioning accuracy, is an essential factor. Therefore, the DOP relationship between systems is very important. In this paper, the DOP relationship between TDOA and TOA in systems lacking clock bias is derived analytically and verified experimentally. Also, using those of earlier studies, the DOP relationship in each of defined systems is derived analytically.

• 제어로봇시스템학회논문지
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• 제17권1호
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• pp.68-71
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• 2011

A relationship between reader arrangement and DOP is derived from the geometry matrix of the TDOA-based position tracking system. It is shown that the minimum value of the DOP is affected by the number of readers, arrangement of readers and position of the tag. The relationship is verified through computer simulations for two cases of reader arrangement.

• Elastomers and Composites
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• 제34권5호
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• pp.391-398
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• 1999

폴리염화비닐(PVC)에 프탈산계 가소제인 di-2-ethyl hexyl phthalate (DOP)와 아디프산계 가소제인 di-2-ethyl hexyl adiphate (DOA)를 혼련하였다. 혼련한 컴파운드의 비중, 인장강도, 신율, 경도, 내마모성, 내한굴곡성을 측정하였다. 먼저 PVC의 중합도에 따른 물성을 알아보면, 중합도 2500인 PVC를 사용한 컴파운드(이하 P2500계)가 중합도 1300인 PVC를 사용한 컴파운드(이하 P1300계)보다 인장강도, 경도에서 상대적으로 우수하게 나타났고, 신율, 내마모성, 내한굴곡성에서는 P1300계가 P2500계 보다 우수하게 나타났다. 그리고, 비중은 PVC의 중합도에 상관없이 비슷하게 나타났다. 또 가소제의 종류에 따른 PVC 컴파운드의 기계적 물성을 알아보면, 가소제로 DOP를 첨가한 PVC 컴파운드(이하 DOP계)가 DOA를 첨가한 PVC 컴파운드(이하 DOA계)보다 인장강도, 신율에서 우수하게 나타났고, 내마모성, 내한굴곡성에서는 DOA계가 상대적으로 DOP계보다 우수하게 나타났다. 그리고 경도는 DOP계가 높게, 비중은 DOA계가 더 낮게 나타났다.

• Journal of the korean society of oceanography
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• 제35권2호
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• pp.89-97
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• 2000

The pyritization of heavy metals in Lake Shihwa sediments was investigated to determine sedimentary Pyrite-heavy metal associations influenced by various metal fractions, organic carbon, and total reduced sulfur. Parameters indicating the degree of heavy metal pyritization (DTMP) and degree of pyritization (DOP) were used to study the incorporation of heavy metals into the pyrite phase. The DOP levels ranged from 3.28-39.45%, showing wide differences among sampling stations. The levels were greater near the water gate and the center of the lake than near the industrial complex. The spatial pattern of the DOP levels was similar to the S/C ratio and also to the salinity. Based on the measured relationships between DOP and DTMP, heavy metals can be divided into three groups. In the first group was As, which showed a high affinity for pyrite. In the second group were Ni, Co and Cu, which showed a gradual increase in DTMP with increasing DOP. In the final group were Pb, Zn, Mn and Cr, which all showed a low DTMP with constant values with respect to DOP.

• Fisheries and Aquatic Sciences
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• 제9권1호
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• pp.30-37
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• 2006

We performed experiments on the uptake and excretion of dissolved organic phosphorus (DOP) using two toxic dinoflagellates, Alexandrium tamarense Lebour (Balech) and Gymnodinium catenatum Graham, isolated from Hiroshima Bay, Japan. ATP (adenosine triphosphate), UMP (uridine-5-monophosphate), G-6-P (glucose-6-phosphate) and Glycero-P (glycerophosphate) were used as DOP sources in preliminary uptake experiments. ATP was selected as the DOP species for the short-tenn uptake experiment because preliminary experiments showed it to be the DOP source used by both species. Although the $K_s$ values of A. tamarense and G. catenatum (5.63 and $7.61{\mu}M$, respectively) obtained from the short-term experiments for ATP were only slightly higher than those reported for dissolved inorganic phosphorus (DIP), the ${\rho}_{max}$ values (5.04 pmol/cell/h and 13.4 pmol/cell/h, respectively) were much higher. The DOP excretion rate in batch-culture experiments was estimated at 0.084 pmol/cell/h for A. tamarense and 0.012 pmol/cell/h for G. catenatum, accounting for about 30% and 25%, respectively, of the assimilated phosphorus. Our results suggest that the DIP-depleted conditions of Hiroshima Bay favor these two species by supporting their ability to use DOP.

• 공업화학
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• 제25권6호
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• pp.602-606
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• 2014

본 연구에서는 norbornene dialkyl ester 8종을 PVC에 적용하여 물리적 물성의 변화를 관찰하였다. PVC 시편은 PVC와 norbornene dialkyl ester, 안정제 등을 배합하여 제작하였고, 경도, 인장강도, 신율, 인열강도, 투과도, 투명도, 황변지수를 측정하여 DOP를 적용한 경우와 비교하였다. 경도는 dicyclohexyl-5-norbornene-2,3-dicarboxylate (DCHN)를 제외한 화합물 7종이 DOP와 동등 이상의 값을 나타내었다. DCHN을 적용한 경우 경도가 매우 높아 인장 특성 및 인열강도를 분석하지 못하였다. 인장 특성은 diisononyl-5-norbornene-2,3-dicarboxylate (DINN)을 제외한 6종의 화합물이 인장강도와 신율이 모두 개선되는 결과를 나타내었다. 인열강도와 투과도는 측정된 모든 화합물이 DOP를 적용한 경우와 동등 이상의 물성을 보였으며, 투명도는 DDN을 제외한 다른 norbornene 유도체들은 양호한 상태를 나타내었다. 황변지수에서는 DPN과 DON이 DOP와 유사한 결과를 나타내었다.