• KIISE Transactions on Computing Practices
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• v.22 no.1
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• pp.1-7
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• 2016

When multiple applications are running concurrently on a multi-processor system, interferences between applications make it difficult to guarantee real-time constraints. We propose a novel interference analysis technique that allows sharing of share processors among dataflow applications, while satisfying real-time constraints. Based on the interference analysis, we develop a co-scheduling technique that aims to minimize the resource usage. Compared to an existent technique that involves converting application graphs to real-time tasks, the proposed technique shows better results in terms of resource usage, especially when it is applied to applications with tight time constraints.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.37 no.1
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• pp.62-68
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• 2009

The interaction between wall blowing and oxidizer flow can generate a very complicated flow characteristics in combustion chamber of hybrid rockets. LES analysis was conducted with an in-house CFD code to investigate the features of turbulent flow without chemical reactions. The numerical results reveal that the flow oscillations at a certain frequency exists on the fuel surface, which is analogous to those observed in the solid propellant combustion. However, the observation of oscillating flow at a certain frequency is only limited to a very thin layer adjacent to wall surface and the strength of the oscillation is not strong enough to induce the drastic change in temperature gradient on the surface. The visualization of fluctuating pressure components shows the periodic appearance of relatively high and low pressure regions along the axial direction. This subsequently results in the oscillation of flow at a certain fixed frequency. This implies that the resonance phenomenon would be possible if the external disturbances such as acoustic excitation could be imposed to the oscillating flow in the combustion chamber.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.4
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• pp.1976-1981
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• 2013

In this paper, we propose a frequency-domain interference cancellation algorithm for direct-sequence spread spectrum systems. In the previously proposed frequency-domain interference cancellation algorithms that protocol defines the rules concerning the collection of means of Transmission Control Protocol (TCP: Transmission Control Protocol) is the most widely used in the transport layer. Two-way traffic through the network path to the same end-to-end transfer of data in the opposite direction between pairs of nodes are infused with two or more TCP connection using the network traffic patterns from the exchanger and routers share results of approval. Per-flow input/output structure of matter using the LTS online reaction when evaluated as this is the most important factor. TCP-MT when the connection duration is one of the largest performance gains.

• Korean Journal of Cognitive Science
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• v.35 no.2
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• pp.113-127
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• 2024

Attention and emotion interact intimately. Anxiety, for example, modifies attentional mechanisms to enhance the processing of threat-related information. But how can it modulate attention? Studies of the emotional Stroop task showed clearly that color naming was interfered with more by negative word distractors than by neutral distractors in anxious participants. However, few studies have investigated in what stage an emotional stimulus biases attention. The present study investigated the locus of interference in the emotional Stroop task by manipulating the SOA (Stimulus Onset Asynchrony) between the word distractor and the color target (0ms, 120ms, or 240ms). Results showed that interference occurred only with 0ms of SOA for anxious participants, whereas for non-anxious participants, there was no interference effect. These results support the view that the attentional mechanism was modulated in early stage of information processing by anxiety.

• Korean Journal of Clinical Laboratory Science
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• v.55 no.1
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• pp.45-51
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• 2023

Canine parvovirus type 2 (CPV-2) and canine coronavirus (CCoV) are major pathogens that can induce gastroenteritis in dogs. They are highly contagious and have a high morbidity rate. There are no specific treatments available for them to date. Therefore, rapid and accurate diagnosis becomes essential. The rapid diagnostic test (RDT) for animals can be used widely in the field because it is fast and easy to use for diagnosis. Thus, this study aimed to clinically evaluate and confirm the clinical utility of CPV-2/CCoV RDT. The parameters evaluated included the limit of detection (LoD), cross-reactivity, interference, sensitivity, specificity, negative likelihood ratio (NLR), and kappa value. The results revealed that the LoD values for CPV-2 and CCoV were 9.7×10 50% tissue culture infectious dose (TCID₅₀)/mL and 2.5×10² TCID₅₀/mL, respectively. There was no cross-reactivity with nine pathogens or interference by interfering materials. The RDT showed a sensitivity of 90.0%, a specificity of 100.0%, NLR of 0.1, and a kappa value of 0.90 for diagnosing both viruses. In conclusion, CPV-2/CCoV RDT is useful as a screening test because of its high sensitivity, specificity, kappa value, and low NLR.

• Korean Journal of Food Science and Technology
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• v.47 no.3
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• pp.299-305
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• 2015

The Folin-Denis assay using the Folin-Ciocalteu (F-C) reagent has been commonly used for analyzing the total phenolic compound content in various food products. In the present study, the effects of proteins on the reactivity of the F-C reagent with different phenolic compounds were investigated. Bovine serum albumin (BSA) or skim milk proteins showed a concentration-dependent increase in color response in the Folin-Denis assay; these proteins decreased the color response of most phenolic compounds tested. The reactivity of phenolic compounds was significantly less pronounced in the presence of BSA and this interference was greater at higher concentrations of phenolic compounds. The reactivity of phenolic compounds with the F-C reagent was reduced significantly by their oxidation; the reaction of the oxidized products with the F-C reagent was more severely affected by BSA. The interfering effects in the Folin-Denis assay might be attributable to binding interactions of phenolic compounds with proteins.

• Journal of the Korean Arthroscopy Society
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• v.7 no.2
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• pp.206-214
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• 2003

Purpose : To analysis each clinical results after arthroscopic ACL reconstruction with using variable fixatives which are metallic and bioabsorbable interference screw, and RIGIDfix. Therefore, We reported the clinical reliability and safty of ACL reconstruction using RIGIDfix. Materials and Methods : We evaluated the results of arthroscopic ACL resconstruction with patellar tendon autograft among three groups, of which group 1 is used metal interference screw for 44 patients, group 2 used bioabsorbable interference screw for 47 patients, group 3 used RIGIDfix for 42 patients. We compared the clinical results by physical examination (anterior drawer test, Lachman test and pivot shift test), Lysholm score and KT-2000 arthrometer and compared the radiological results by measurement of tunnel and fixatives position and widening and by MRI findings. We analyzed the results by SAS 8.2 Ducan. Tukey and paired t-test Results : Physical instability was in 5 cases, which group 2 had 4 cases and group 3 had 1 case. Lysholm score improved from 59.8. 64.4, 61 to 90.1, 92.3. 92. KT-2000 arthrometer instability improved from 9.20, 10.2, 9.5 to 1.43. 1.62. 2.00 (p=0.478). Radiologically, all cases had excellent tunnel position and cyst change was observed the 8 cases in the group 2, but, all 20 cases 2nd MRI had signal change of peri-fixatives. But, no correlation of clinical results. Conclusion : No statistical difference of clinical instability was found among three groups. And femoral tunnel changes were much observed in group I, II than III. We considered the RIGIDfix has much advantages because the short operation time, better fixation position and much bone contact surface. But, further long term follow up study was needed.

• Journal of the Korean Society of Tobacco Science
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• v.32 no.1
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• pp.41-54
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• 2010

담배 주류연은 수천가지 종류의 다양한 형태의 화학물질로 구성되어있고, 이들 화학물질의 대부분은 극히 미량의 농도로 존재하는 것으로 알려져 있다(Green and Rodgman, 1996). 담배연기 속에서 발암물질로서는 poly cyclic aromatic hydrycarbon (PAHs) 류인 B(a)P를 최초로 보고된 이후, 현재까지 69종의 화합물이 담배연기중의 발암물질로서 알려졌으며, 여기에는 9종의 PAHs 그리고 4종의 aromatic amine, nitrosoamines 및 aldehydes 그리고 다른 무기 및 유기 화합물들을 포함된다. 또한 담배 주류연에는 여러 화학물질들에 의해 유발된 생물학적 독성을 상당히 감소시키는 것으로 확인된 성분들이 존재하는 것으로 알려져 있다. 이러한 담배연기 중에 존재하는 항 발암성 효과를 나타내는 성분들의 작용 메카니즘은 발암성 물질 또는 발암성 물질의 대사산물들과 반응을 하거나, 불활성화 시키거나, 세포 구성 물질들과의 반응에서 서로 경쟁하거나, 또는 발암성의 흡수를 간섭함으로서 발암성 효과를 없애거나 또는 감소시키는 것으로 생각된다. 여러 연구자들은 담배연기 응축물에서 종양 성장의 억제 작용을 하는 성분들이 존재하는 것으로 주장 하고 있다.(Hoffmann and Griffin, 1958; Fall et al., 1964; Homburger and Tregier, 1965). 담배 연기 중에는 발암성을 나타내는 성분들과 함께 항 발암성 및 항 돌연변이성 효과를 나타내는 성분들이 존재한다는 것이 다양한 생물학적 평가 연구들에 의해 증명되었다(Slaga and DiGivanni, 1984; Fay et al., 1984; Green and Rodgman, 1996).

• Proceedings of the Korean Society for Cognitive Science Conference
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• 2000.05a
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• pp.55-60
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• 2000

연속재인과제에서 자극을 즉각적으로 반복 제시하거나 지연 반복 제시할 경우 사건관련전위에 차이가 나타나는지, 만약 차이가 관찰되면 자극 제시 후 어느 시점에서 차이가 두드러지게 나타나는지를 조사하였다. 실험 결과 즉각적 재인이 지연 재인에 비해 더 높은 반응정확율과 더 빠른 반응시간을 보였고 사건관련전위에서는 P300의 진폭이 더 컸고 잠재시간도 더 빨랐다. 그리고 지연재인에서 관찰되는 N400이 즉각적 재인에서는 나타나지 않았다. 지연재인에 비해 즉각적 재인에서 P300의 진폭이 더 크고 잠재시간이 더 빠르게 나타난 것은 P300이 template matching을 통한 정보처리 과정을 반영해 준다는 주장을 지지해 준다. 즉 즉각적 재인에서는 지연 재인에 비해 template matching이 훨씬 더 정확하고 빨리 일어나며 이 결과 P300의 진폭이 커지고 잠재시간이 더 빨라진 것으로 이해된다. 즉각적 재인에서는 방금 제시된 자극(시간 간격은 2초)을 재인하기 때문에 기억의 탐색 과정이 요구되지 않는 반면 5개의 간섭 단어 후에 반복 제시되는 단어를 재인하는 지연 재인에서는 단어에 대한 탐색 과정이 필요하며, 이에 따라 N400이 초래된 것으로 여겨진다. 이 결과는 N400이 기억 탐색 과정을 반영한다는 주장을 지지해 준다. 사건관련 전위에서 즉각적 재인과 지연 재인의 차이는 자극 제시 300ms에서 450ms사이에 가장 두드러지게 나타났다.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.33 no.4
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• pp.17-26
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• 2005

Numerical investigation has been made on the aerodynamic characteristics of supersonic air-launching rocket, as a new concept launching mechanism. Parametric study on the variations of launching velocity, incident angle and mounting location of the rocket has been performed using three dimensional Euler equations. Influential factors at separating stage of the rocket were extracted through comprehensive analyses, and, the response surface models were constructed for those factors. From the study, the aerodynamic behavior of the air-launching rocket at supersonic speed and useful guidelines for the optimal mounting location of the rocket have been obtained.