• Korean Journal of Veterinary Service
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• v.41 no.1
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• pp.51-55
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• 2018

Herein, we report a case of badgers showing high morbidity and mortality rate due to the mixed infection of canine distemper virus (CDV) and Streptococcus canis (S. canis) in a farm where wild animal, badger, is being reared for herbal medicine. During the period of about one month, 120 out of 320 badgers showed severe respiratory symptoms and died, and 3 bodies were submitted to the Animal and Plant Quarantine Agency for disease diagnosis. The lung with the most severe necropsy findings failed to collapse and showed dark reddening and had yellowish nodules on the cut surface. The characteristic and common histopathologic findings include multifocal necrosis with hemorrhage of the lung, severe lymphoid depletion of the spleen and intracytoplasmic or intranuclear inclusion bodies in almost all organs. Finally, CDV and S. canis were identified by immunohistochemistry and bacterial isolation, respectively. This is the first mixed infection case of CDV and S. canis in badgers being raised on the farm.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.48 no.10
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• pp.753-763
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• 2020

A wind tunnel test of 29.7% scaled model of NASA Common Research Model with belly model support was performed in small low speed wind tunnel. The static aerodynamic forces and moments of CRM were measured with belly sting support configuration. Pitching moments of belly sting with various fairings were compared and small interference fairing shape was found. The belly sting model support interference and reducing effect of fairing shapes with CFD analysis.

• Journal of the Korean Society of Propulsion Engineers
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• v.24 no.5
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• pp.56-64
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• 2020

A wind tunnel test of 29.7% scaled model of NASA Common Research Model was performed in small low speed wind tunnel. The wind tunnel model was fabricated in Aluminium in consultation with NASA Langley Research Center and AIAA Drag Prediction Workshop committee members. The static aerodynamic forces and moments were measured at a relatively low Reynolds number of 0.3 × 10⁶ due to tunnel capability limitations. Pitching moment of three types of model support(Fin sting, Blade sting and Belly sting) were compared. The pitching moment for corrected Belly sting and Fin sting were similar. The result of pitching moment for Blade sting was very small.

• 한국IT서비스학회:학술대회논문집
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• 2009.05a
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• pp.531-534
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• 2009

현대 무기체계의 복잡성과 고가성은 무기체계 개발에 SW컴포넌트인 공통서비스를 도입시켰고, 실례로 미육군에서는 미래전투체계 개발에 공통서비스를 도입하여 개발 중에 있다. 최근 한국군도 무기체계 개발에 공통서비스 도입의 필요성이 제기되고 있다. 따라서 본 논문에서는 무기체계 공통서비스에 대한 선행연구로서 참조모델(RM) 간의 관계 분석과 구현 참조모델(IRM)의 진화에 따른 공통서비스 변화과정을 분석한다. 그리고 서비스 대상의 특성에 따라 3개의 서비스에디션으로 진화된 구현 참조모델의 진화과정과 진화로 인한 영향을 분석한다. 이를 통해 한국군 무기체계 공통서비스를 도출하는데 있어 기술적인 기여를 할 것으로 기대한다.

• Journal of the Korea Institute of Military Science and Technology
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• v.18 no.2
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• pp.109-114
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• 2015

A method to compensate a bias hysteresis error of the ring laser gyro using the rate of temperature is proposed in this paper. Until now, we generally have measured and compensated the error of gyro and accelerometer using the temperature. However, we utilize the measured values of the temperature dependent error elements on the temperature rate in navigation system level. We show through experiments that the proposed method can improve the navigation performance and be very effective.

• Journal of the Korea Institute of Military Science and Technology
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• v.21 no.5
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• pp.623-629
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• 2018

The acceleration and the angular velocity that include natural frequencies of a missile detected by Inertial Measurement Unit(IMU) are transmitted to the control loop of a missile. The control loop command that is calculated using above signals can cause the resonance of the missile while it flies. Hence it is common to adapt the filter and the control loop for attenuating or eliminating the undesired signals such as natural frequencies. This paper introduces the new test technique using a floating system for performance evaluation of the designed filter and the control loop prior to a flight test. The proposed scheme can check out the degradation property of vibration in the filter and the control loop, while the conventional hardware-in-the-loop simulation(HILS) scheme cannot.

• Korean Journal of Veterinary Service
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• v.35 no.2
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• pp.129-131
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• 2012

Blood samples were collected from 672 goats in 60 farms from five provinces of Korea between November 2009 and August 2011. The prevalence of antibodies to pestiviruses was investigated. The examination for antibodies was performed using an enzyme-linked immunosorbent assay (ELISA) detecting antibodies to the bovine viral diarrhea virus (BVDV) and border disease virus (BDV). All blood samples were screened using reverse transcription-polymerase chain reaction (RT-PCR) with primer pairs specific to common pestivirus genome regions. The observed individual seroprevalence was 1.49% and herd seroprevalence was 11.67%. Also, the specific genomes to pestiviruses were detected in 3 out of the 915 clinical samples (0.45%). Based on the nucleotide sequence data, detected pestiviruses were belonged to two BVDV type-1 and one BVDV type-2. The pestivirus infection has been occurred among Korean black goats. However, our results indicate that the prevalence of pestiviruses in black goats was not significantly higher on farms with cattle.

• Parasites, Hosts and Diseases
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• v.58 no.5
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• pp.589-592
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• 2020

Cyclospora cayetanensis is an apicomplexan protozoan and is one of the most common pathogens causing chronic diarrhea worldwide. Eight stool samples with diarrheal symptom out of 18 Korean residents who traveled to Nepal were obtained, and examined for 25 enteropathogens including 16 bacterial species, 5 viral species, and 4 protozoans in stool samples as causative agents of water-borne and food-borne disease. Only C. cayetanensis was detected by nested PCR, and 3 PCR-positive samples were sequenced to confirm species identification. However, the oocysts of C. cayetanensis in fecal samples could not be detected by direct microscopy of the stained sample. As far as we know, this is the first report of a group infection with C. cayetanensis from a traveler visiting Nepal, and the second report of a traveler's diarrhea by C. cayetanensis imported in Korea.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.35 no.4
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• pp.230-242
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• 2024

Objectives: Depression and anxiety are emotional difficulties that are common among adolescents. Adolescents suffering from depression and anxiety can exhibit problems such as antisocial behavior, aggression, and academic slump. This study aimed to explore the factors influencing adolescents' depression and anxiety during the coronavirus disease 2019 (COVID-19) pandemic. Methods: This study examined the data from an online student health survey conducted by the Ministry of Education in 2022. The survey participants were 131194 students ranging from the first grade of middle school to the third grade of high school. The influence of each variable on depression and anxiety was examined. Results: Factors that predicted depression and anxiety were sex (female), grade level (higher), financial difficulties (existing or unknown), physical activity (higher), sleep time (shorter), media usage time (higher), family/friends relationship (worse), and change in the health status of family, friends, and oneself due to COVID-19 (worse). Conclusion: These results may help identify patterns of depression and anxiety among adolescents caused by COVID-19 and maximize the intervention effect.

• Journal of Korean Academy of Dental Administration
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• v.11 no.1
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• pp.8-18
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• 2023

The purpose of this study is to examine the organizational culture of dental hospitals and clinics, as well as to assess members' perceptions and actual conditions related to sexual harassment. The research method involved conducting a cross-sectional survey of 149 dental hygienists using random sampling. The analysis utilized frequency analysis and descriptive statistical analysis. Regarding awareness of organizational culture within the workplace, 39.6% responded, "It is difficult to freely use maternity and childcare leave at our workplace". When asked about sexual harassment, 51.7% of respondents said they had received training on sexual harassment prevention. The highest level of sexual harassment experienced was "sexual analogy or evaluation of appearance", at 45.8%. The most common perpetrators of sexual harassment were agency heads and directors, at 37.5%. The most common behavior of the victim at the time was "changing the subject or avoiding the scene" (41.7%). 50.0% of victims of sexual harassment responded to the harm by "just putting up with it". The most common response to the direct and indirect impact of sexual harassment was "there was no specific impact". The most common response from the agency was "there were no suitable measures". Regarding the most necessary policy to prevent sexual harassment, "strict punishment for perpetrators (37.5%)" was the highest. There is a need for organizational and cultural changes to reduce sexual harassment in the workplace. Additionally, it is crucial for the country and society as a whole to actively participate in and improve the system.