• 한국수정란이식학회지
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• 제24권3호
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• pp.139-143
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• 2009

Most captive canids and felids at Zoos in advanced countries have been examined enough to apply artificial reproductive techniques to them. We investigated reproductive hormones and vaginal epithelial cells of a 6-year-old, female coyote, hoping these data could eventually be extended to artificial insemination with frozen-thawed conspecific semen at Seoul Zoo. As a relative of pet dogs, coyote exhibited a similar appearance with only minor differences. In vaginal smear, an increase in the number of superficial cells suggests that the bitch has reached a state close to estrus. A sudden decrease of estradiol and increase of progesterone is considered as a preovulatory event. Vaginal epithelial cells and hormones might be useful for determining the optimal time of artificial insemination in coyotes' breeding.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권7호
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• pp.1873-1893
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• 2023

The development of lightweight, low energy and small-sized sensors incorporated with the wireless networks has brought about a phenomenal growth of Wireless Sensor Networks (WSNs) in its different fields of applications. Moreover, the routing of data is crucial in a wide number of critical applications that includes ecosystem monitoring, military and disaster management. However, the time-delay, energy imbalance and minimized network lifetime are considered as the key problems faced during the process of data transmission. Furthermore, only when the functionality of cluster head selection is available in WSNs, it is possible to improve energy and network lifetime. Besides that, the task of cluster head selection is regarded as an NP-hard optimization problem that can be effectively modelled using hybrid metaheuristic approaches. Due to this reason, an Improved Coyote Optimization Algorithm-based Clustering Technique (ICOACT) is proposed for extending the lifetime for making efficient choices for cluster heads while maintaining a consistent balance between exploitation and exploration. The issue of premature convergence and its tendency of being trapped into the local optima in the Improved Coyote Optimization Algorithm (ICOA) through the selection of center solution is used for replacing the best solution in the search space during the clustering functionality. The simulation results of the proposed ICOACT confirmed its efficiency by increasing the number of alive nodes, the total number of clusters formed with the least amount of end-to-end delay and mean packet loss rate.

• Advances in Computational Design
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• 제8권1호
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• pp.37-59
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• 2023

Squat reinforced concrete (SRC) shear walls are a critical part of the structure for both office/residential buildings and nuclear structures due to their significant role in withstanding seismic loads. Despite this, empirical formulae in current design standards and published studies demonstrate a considerable disparity in predicting SRC wall shear strength. The goal of this research is to develop and evaluate hybrid and ensemble artificial neural network (ANN) models. State-of-the-art population-based algorithms are used in this research for hybrid intelligence algorithms. Six models are developed, including Honey Badger Algorithm (HBA) with ANN (HBA-ANN), Hunger Games Search with ANN (HGS-ANN), fitness-distance balance coyote optimization algorithm (FDB-COA) with ANN (FDB-COA-ANN), Averaging Ensemble (AE) neural network, Snapshot Ensemble (SE) neural network, and Stacked Generalization (SG) ensemble neural network. A total of 434 test results of SRC walls is utilized to train and assess the models. The results reveal that the SG model not only minimizes prediction variance but also produces predictions (with R²= 0.99) that are superior to other models.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2005년도 추계종합학술대회
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• pp.569-572
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• 2005

This paper proposed the design and implementation of a DSP platform for the various multimedia streaming. The DSP platform synchronizes with host PC to configure DSP and to transmit multimedia streaming through PCI. The suggested DSP platform decodes high-capacity video/audio data using the suggested high-speed FIFO, CPLD and memory interface. The buffer control techniques is proposed in other to avoid the under/over-run of the audio/video data during the audio/video decoding. For the DSP platform test, host PC transmits program stream(PS) that consists of the MPEG-2 video MP@ML and 5.1ch AC3 audio data (Coyote.mov file, half hour running time) to DSP platform. The DSP platform plays continuously back the high sound-quality audio and high-definition video at once.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1999년도 봄 학술발표회 논문집
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• pp.159-168
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• 1999

In seismic analysis, there are two main ways - uniform load method and dynamic analysis, dynamic analysis can be divided into response spectrum analysis and time history analysis. In case of which get the complexion of the vibration with 3-axis of coordinate direction in each mode of free vibration mode happened owing to complication of the shape, 3-dimensional dynamic analysis is recommended to perform as multi-mode spectral analysis in standard specification for highway bridge. The purpose of this study is to understand the dynamic behavior by performing multi-mode seismic analysis according to responses analysis and time history anal)'sis in using record of earthquake. In accordance with the criterion of seismic design as defined in standard specification for highway bridge by using modified records of the El Centre and Coyote Lake earthquake, response spectrum was constructed by using the tripartite logarithmic plot. The 3-span continuous space truss bridge was selected as model of numerical analysis. As the result performed time history analysis and analysis of response spectrum for the model of numerical analysis, the result of time history analysis was slightly larger than that of response spectrum analysis. This coincide with the tendency of the result came from the analysis when using a jagged response spectrum analysis, This coincide with the tendency of the result came from the analysis when using a jagged response spectrum for a single excitation. In the Process of performing these two analysis. response spectrum analysis is more effective than time history analysis in saving times in analyzing data.

• Geomechanics and Engineering
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• 제30권1호
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• pp.1-10
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• 2022

Seismic ground response evaluation is one of the main issues in geotechnical earthquake engineering. These analyses are subsequently divided into one-, two- and three-dimensional methods, and each of which can perform in time or frequency domain. In this study, a novel approach is proposed to assess the seismic site response using two-dimensional transfer functions in frequency domain analysis. Using the proposed formulation, a program is written in MATLAB environment and then promoted utilizing the equivalent linear approach. The accuracy of the written program is evaluated by comparing the obtained results with those of actual recorded data in the Gilroy region during Loma Prieta (1989) and Coyote Lake (1979) earthquakes. In order to precise comparison, acceleration time histories, Fourier amplitude spectra and acceleration response spectra diagrams of calculated and recorded data are presented. The proposed 2D transfer function diagrams are also obtained using mentioned earthquakes which show the amount of amplification or attenuation of the input motion at different frequencies while passing through the soil layer. The results of the proposed method confirm its accuracy and efficiency to evaluate ground motion during earthquakes using two-dimensional model. Then, studies on irregular topographies are carried out, and diagrams of amplification factors are shown.

• 대한인간공학회지
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• 제30권2호
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• pp.311-317
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• 2011

Objective: The present study was intended to identify (1) the intra- and inter-rater reliabilities of a visual sensibility evaluation protocol and (2) the effects of NaCOC color and scouring method on the visual sensibility of NaCOC. Thirty female participants(20s & 30s) were participated in the visual sensibility evaluation of NaCOC. Background: Interests in naturally colored organic cotton(NaCOC) increase rapidly in parallel with the social trend of eco-friendly living and wellbeing. Method: Three color sets (ivory, green, and coyote-brown) of NaCOC specimens including one untreated and four treated specimens($Na_2CO_3$; NaOH; enzyme; boiling water) were examined in the study. The visual sensibility evaluation was conducted by the test-retest method using nine pairs of bipolar visual sensibility adjectives(bright-dark; clear-murky; heavy-light; vivid-subdued; warm-cool; fresh-stale; strong-weak; showy-plain; and luxurious-cheap). Results: As a result of reliability of a visual sensibility evaluation protocol, inter-rater variability(average SD=1.06) of visual sensibility evaluation was more than 1.4 times the intra-rater variability(average SD=0.74). However, both the sensibility evaluation reliabilities did not show any systematic pattern of changes. Lastly, ANOVA and post-hoc analysis showed that preferred scouring methods for a visual sensibility adjective pair significantly vary depending on NaCOC color. Application: Both the reliability of visual sensibility evaluation protocol and the analysis of proper scoring method of NaCOC in the study would be useful information to design the affective textile.

• 한국경제지리학회지
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• 제16권3호
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• pp.372-388
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• 2013

일반적으로 커피 중개상인은 이윤을 극대화하기 위하여 농가의 커피 생산 통제, 불공정 커피 가격 지불, 일련의 부당 행위 등을 통하여 소규모 영세 커피 농가의 이윤을 착취하는 이른바 '코요테'로 인식되어 왔다. 그러나 베트남 커피 가치사슬 상에서 중개상인이 획득하는 실질적인 이윤은 과장되었으며, 심지어 부당하다고 볼 수 있다. 따라서 본 연구의 목적은 커피 농가, 중개상인, 수출가공업체들 간의 관계 및 연계 분석을 통하여 베트남 커피 가치사슬에서 커피중개상인의 역할과 의미를 재고찰하고자 하였다. 분석 결과, 베트남 커피 중개상인이 획득하는 이윤은 타 커피 관련 주체들과 비교하여 상대적으로 미미하였으며, 지역 커피 농가의 이윤을 착취하기 보다는 오히려 지역 경제 변화의 매개체로서 중요한 역할을 하고 있는 것으로 나타났다. 베트남 닥락 커피 중개상인은 농가에 구매자를 공급해줌으로써 지역 커피 농가의 글로벌 시장 접근성을 제고시켜 시장 촉진자로서의 역할을 하였다. 또한 글로벌 수출 가공업체의 수요에 조응하는 지속 가능한 커피 생산을 활성화하여 지속 가능한 커피 생산의 매개체로서 역할을 하였다.

• Journal of Animal Science and Technology
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• 제53권4호
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• pp.303-310
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• 2011

mtDNA D-loop 970 bp의 염기서열을 이용하여 제주견과 우리나라의 토종견인 진도견, 풍산견, 삽살견과의 관계와 외국 품종들과의 유연관계를 분석하였다. 또한 초가변영역인 598 bp의 D-loop 부위가 보고된 염기서열들은 추가로 GenBank에서 수집하여 전체 30개의 품종으로부터 214종의 단상형들을 이용하여 AMOVA 분석을 하였다. 염기서열 분석결과 제주견에서 5종류, 진도견 4종류, 삽사리 4종류, 풍산견 5종류, 이스트라이카와 웨스트라이카(Canis familiaris) 각 2종류, 회색늑대(Canis lupus) 2종류, 코요테(Canis latrans) 2종류의 단상형을 얻었다. 한국, 일본, 중국, 유럽의 견품종 사이에 지역의 차이로부터 오는 변이성(1.4%)은 동일 지역에 서로 다른 품종들 사이의 변이(16.2%) 보다도 매우 적은 변이를 보이고 있었다. 개의 조상으로 여기는 늑대와 오늘날 개의 집단과의 염기서열 분산성분 분석에서 개(1.63%)와 늑대(3.64%)의 집단내 변이보다는 개와 늑대 사이의 진단간 변이(4.51%)가 높게 나타난 것으로 나타났으며, 이 값을 근거로 하면 개와 늑대사이에 유전적 분기시기는 약 1~2백 만년 전인 것으로 추정되었다. 염기서열의 변이성과 유연관계분석에서 제주견, 진도견, 풍산견, 삽살견 모두 독특한 계통분기를 형성하지 못했다. 즉 이러한 결과는 국내 토종견들 사이와 또는 유입된 외래품종들 사이에 오랜 세월 동안 서로 상당한 교류가 있었을 것으로 생각되었다. 제주견에서는 삽살이, 진도견, 풍산견의 염기서열과 가까운 유연관계를 보이는 단상형들이 산포되어 있는 것으로 확인되어 제주견 집단이 우리나라 재래종들과의 모계조상에 있어서 구분은 어려운 것으로 확인되었다. 제주견이 집단으로 고정정도를 가늠하는 Fixation index인 Fst값은 진도견, 풍산견, 삽살견 가운데 가장 낮게 나타났다.