軍需問題 事例硏究(3)

송근호 해군대학 1981 海洋戰略 Vol.- No.7

포스트 COVID19 대응 실내외 공기질 빅데이터를 활용한 환기청정기 개발 및 운영

송근호,김경태,전수정 한국대기환경학회 2021 한국대기환경학회 학술대회논문집 Vol.2021 No.10

대부분 사람은 실내에서 생활하고 있으며 실내 공기질은 사람의 건강을 위한 가장 중요한 요소 중 하나이다. 미세먼지는 WHO에서 지정한 1군 발암물질이며, SARS (Severe Acute Respiratory Syndrome), 코로나(COVID-19) 등의 감염병 예방을 위해서도 실내공기질 관리는 매우 중요한 부분으로 주목받고 있다. 우리나라의 환기 관련된 법규는 2006년부터 공동주택 및 다중이용시설에 의무적으로 적용되기 시작하였고, 초기 실내 거주자의 환기장치 활용률은 낮았으나 최근 몇 년간 미세먼지와 코로나 등의 영향으로 환기장치의 활용 빈도와 활용률은 점점 높아지고 있다. 환기장치를 잘 사용하지 않는 이유는 환기장치의 성능이 부족하거나 환기장치의 가동 시기와 방법을 모르기 때문이다. 최근 환기장치는 실내외 공기의 기본적인 환기 기능을 바탕으로 미세먼지의 모집률 증가, 세균과 바이러스를 제거하기 위한 기능을 추가하고 있다. 동시에 환기장치의 효율적인 가동을 위하여 실내외 공기질 데이터 분석을 바탕으로 알고리즘을 적용한 자동운전 기능을 적용하고 있으며, 동시에 최적의 에너지 소비를 위한 방식으로 개발되고 있다. 이에 따라 기술의 발전은 실내외 공기질 빅데이터를 활용한 환기청정기 개발 및 운영을 통하여 효율적인 실내공기질 관리와 건물에너지 저감에 대비해야 할 것이다.

공기청정 기능이 적용된 공동주택 환기시스템

송근호,정민호 대한설비공학회 2017 설비저널 Vol.46 No.4

차량용 산소발생기의 성능 측정

송근호,유진호,김정은,장화익,이광래 江原大學校 産業技術硏究所 2005 産業技術硏究 Vol.25 No.A

Auto exhausts and air pollution can become trapped in the cabin of vehicle, reducing the amount of oxygen available for breathing. Driver may feel sleepy, headaches, nausea, confusion, dizziness and lower levels of oxygen can damage the driver's general health. Consequently, oxygen generator purified oxygen into the car to help driver get the oxygen driver's body needs. In this study, in order to evaluate the oxygen generator performance, the samples that the various conditions(humidity(50%, 100%), flow and oxygen concentration) were examined. There were three types of oxygen generator; sample 1(2.5ℓ/min, 36%0₂), sample 2(4.5ℓ/min, 41%0₂) and sample 3(5ℓ/min, 39%0₂). As the humidity increased from 50% to 100%, the oxygen concentration of the sample 1(36%), 2(41%) and 3(39%) was reduced 31%0₂, 38%0₂ and 38%0₂, respectively. Also, the each sample measured that effect of human in car on oxygen concentration, if the oxygen concentration is one person in car, each sample of oxygen concentration was 20.8%0₂, 23.7%0₂ and 21.2%0₂. From the above results, it was shown that oxygen generator for car, if the oxygen concentration is increased, effect of humidity is reduced, and that in the sample of supplying a high-rate of oxygen, the oxygen concentration is increased. It was suggested that effect of humidity on oxygen generator for car can be reduced according to the supply of oxygen.

투과증발에 의한 Ester 성분의 소수성막의 투과플럭스

송근호,이광래 한국막학회 2016 멤브레인 Vol.26 No.3

에스테르(ester)의 모델 수용액으로부터 에스테르 성분을 회수하기 위한 투과증발 공정에서, 공급액의 농도와 온 도 변화에 따른 에스테르와 물의 플럭스를 측정하였다. 공급액의 에스테르 농도가 0.15 wt%에서 0.60 wt%로 증가함에 따라 에틸 아세테이트(EA), 프로필 아세테이트(PA), 에틸 프로피오네이트(EP), 부틸 아세테이트(BA), 그리고 에틸 부티레이트(EB) 의 플럭스는 증가하였으며, 공급액의 온도가 30°C에서 50°C로 증가함에 따라 플럭스가 증가하였다. 에스테르 플럭스의 크기 는 (EA) < (PA, EP) < (BA, EB) 순서이었으며, 이는 에스테르와 막 표면과의 친화도에 크게 의존하는 것을 보여준다. 즉, EA는 분자쇄 내에 소수성 기(-CH2-)를 1개, (PA, EP)는 2개를 포함하고 있으나, (BA, EB)는 3개를 가지고 있어 가장 소수성이 크기 때문이다. 이러한 에스테르 분자의 소수성이 에스테르 플럭스에 미치는 영향뿐 아니라 막 표면의 소수성이 에스테르 플럭스에 미치는 영향에 관한 연구가 더 필요할 것이다. 온도가 증가함에 따라, EA, PA, EP, BA, and EB 수용액의 물 플럭스는 증가하였으나, 농도 변화에 따른 물 플럭스는 거의 변화가 없었다. 본 투과증발에 대한 실험결과는 기존의 열을 이용하 는 증발공정과 증류공정을 대체할 수 있는 공정으로서 향 성분의 회수공정을 개선하는 기초 자료로 활용할 수 있을 것이다. The objective of this work was to investigate the performance of pervaporation process for recovery of ester compounds from model aqueous solutions and how the fluxes of esters and water were affected by changes in feed concentration and temperature. The flux of ethyl acetate (EA), propyl acetate (PA), ethyl propionate (EP), butyl acetate (BA), and ethyl butyrate (EB) increased with an increase in feed concentration from 0.15 wt% to 0.60 wt%, and increased with temperature change from 30°C to 50°C. The flux of esters (EA, PA, EP, BA, and EB) was in order of (EA) < (PA, EP) < (BA, EB). This result meant that the flux strongly depended on affinity between esters and membrane surface; EA is the least hydrophobic because it has one hydrophobic function group (-CH2-), (PA, EP) have two (-CH2-), and (BA, EB) are the most hydrophobic because these have three (-CH2-). As well as such an influence of hydrophobicity of ester molecules on ester flux, the influence of hydrophobicity of membrane surface on ester flux needs further investigation. With increase in temperature, water flux of aqueous EA, PA, EP, BA, and EB solution increased. However, water flux of aqueous ester solutions did not change appreciably with increase in concentration. This experimental results may be used as fundamental data for pervaporation (PV) to improve the aroma recovery process as an alternative to thermal evaporation and distillation processes.

Clinical Characteristics of Temporal Bone Metastases

송근호,박기완,허재형,송익찬,박용호,최진웅 대한이비인후과학회 2019 Clinical and Experimental Otorhinolaryngology Vol.12 No.1

Objectives. The purposes of this study were to evaluate the clinical characteristics of temporal bone metastasis (TBM) and to determine whether the characteristics differed according to primary malignancy. Methods. We retrospectively analyzed data on 20 patients diagnosed with TBM between January 2000 and January 2017. Demographics, the period from diagnosis of primary malignancy to TBM diagnosis, the period from TBM diagnosis to death, the type and staging of primary malignancy, otologic manifestations, and TBM sites were assessed. After the primary malignancies were divided into solid cancers and hematologic malignancies, each parameter was compared between the two groups. Results. The most common primary malignancy with TBM was lung cancer (45%). The most common otologic symptoms and signs were facial palsy (30.5%) and hearing loss (30.5%). The temporal squama (23%) and the facial nerve (20%) were the most commonly involved. Most TBMs occurred late in the disease process after the primary malignancy first metastasized to other organs. Hematologic malignancies metastasized significantly more frequently to the external auditory canal and the middle ear/mastoid compared to solid cancers (P=0.001 and P=0.004, respectively). Conclusion. If otologic manifestations such as facial palsy and hearing loss are presented in patients at advanced stages of malignancy, TBM of primary malignancy should be suspected. In addition, hematologic malignancies tend to metastasize to the external auditory canal and the middle ear cleft more commonly than solid cancers do.

Measures to Strengthen Space Cooperation among South Korea, the U.S., and Japan

송근호 국방대학교 국가안전보장문제연구소 2022 The Korean Journal of Security Affairs Vol.27 No.2

This thesis is a study on the ROK-US-Japan space cooperation plan to solve the security crisis on the Korean Peninsula caused by the increase in China's space threat and North Korea's ballistic missile launch. The United States is attempting to utilize the space power and budget of its allies by participating in the Artemis Accords, which are the United States' manned moon exploration program, and jointly respond to China's space expansion. Korea is further developing its space power by successfully carrying out the Korean launch vehicle project and the lunar mission project, and Japan, as an advanced space development country, is increasing national investment in space development. The strengthening of space cooperation between Korea, the United States and Japan will advance the security of the Korean Peninsula and the development of space science and technology between Korea, the United States and Japan.

Suggestions on Measures to Strengthen South Korea-India Space Cooperation in the New Space Era

송근호 국방대학교 국가안전보장문제연구소 2023 The Korean Journal of Security Affairs Vol.28 No.2

This study explores ways to strengthen space cooperation between South Korea and India to enhance Korea's space power while discerning the cutting-edge space exploration capabilities of India, which recently succeeded in landing a moon rover on the moon's south pole for the first time in the world. Along with the United States, Russia, and China, India is recognized for its state-of-the-art space technology. It is the sixth country in the world to launch a practical satellite on its own in 1980 and the fourth country in the world to successfully send a lunar probe in 2008. India's success of Chandrayaan-3 landing on the south pole of the Moon in August 2023 surprised the world once again. Until now, there has been little international space cooperation between Korea and India when compared to the extent of South Korea’s space cooperation with the United States, Russia, and European countries. South Korea must find ways to increase its national space power in the era of the space economy through space cooperation with India, an emerging powerhouse with advance technology, which continues to advance its space technology through international cooperation. Thus, South Korea’s space cooperation with India can help improve Korea's space science technology in the future, including successful moon landing and Mars exploration.

팔걸이가 편마비환자의 보행에 미치는 영향

송근호,이현옥,Song, Geun-Ho,Lee, Hyun-Ok 대한물리치료학회 2006 대한물리치료학회지 Vol.18 No.4

Purpose: This study was to investigate the effect of an arm sling on gait with hemiparesis. Methods: Fifteen patients(8 male, 7 female) with hemiparesis participated in this study and walked self-selected speed over 10m walkway, randomly without arm sling, with Single strap hemisling and Rolyan humeral cuff sling. It were filmed by 5 video camera and used with 3-dimensional motion analyzer system. The following gait variables were analyzed: temporo-spatial parameters, kinematic parameters. Results: In the comparison of temporo-spatial parameters each trial, walking velocity and single support time on affected side was significantly increased and step length on affected side, step length asymmetry ratio, single support time asymmetry ratio was significantly decreased in the Single strap hemisling and Rolyan humeral cuff sling. In the comparison of kinematic parameters each trial, maximal angle of the hip flexion on affected side was significantly increased in the Single strap hemisling and Rolyan humeral cuff sling and maximal angle of the knee flexion on affected side was significantly increased in the Rolyan humeral cuff sling and maximal angle of the ankle dorsiflexion on affected side was significantly increased in the Single strap hemisling. Conclusion: An arm sling improved walking velocity and decreased asymmetry and increased maximal angle of hip, knee, ankle flexion on affected side with hemiparesis caused by stroke.

친수성으로 표면개질한 폴리설폰막의 투과플럭스

송근호,김강희,조성헌,이광래,임종호,배성수 한국화학공학회 2004 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.42 No.1

실관막형 폴리설폰 막의 표면을 2-hydroxyethylmethacrylate(HEMA)로 코팅하였으며, 코팅인자들인 azobisisobutyronitrile(AIBN)/HEMA 성분비, 용매의 종류(물, 메탄올), UV 조사시간 등이 투과플럭스에 미치는 영향을 조사하였다. AIBN/HEMA/ 메탄온ㄹ 용액으로 코팅한 막이 AIBN/HEMA 성분비가 높고, UV 조사시간이 길수록 투과플럭스가 높았다. AIBN/HEMA 성분비가 낮으면 동일한 투과플럭스를 얻기 위하여 UV조사시간을 더 길게 하여야 하며, 특정한 AIBN/HEMA 성분비와 UV 조사시간에서 코팅한 막의 투과플럭스는 원래의 막(코팅하지 않은 막)보다 높게 나타났다. 또한, 오일에멀젼에 의한 fouling은 코팅한 막과 원래의 막에 모두 나타났지만, 코팅한 막의 fouling이 원래의 막 보다 현저히 낮았다. 즉, fouling 발생 후 코팅한 막의 수투과 플럭스(0.2683g/㎠ㆍmin)는 코팅하지 않은 막(0..448g/㎠ㆍmin)보다 약 6배 이상으로 높게 유지되었다. A hollow-fiber type polysulfone UF membrane was surface-coated with 2-hydroxyethylmethacrylate(HEMA). The effect of various coating paramters on permeation flux was investigated, such as concentration ratio of Azobisisobutyronitrile(AIBN)/HEMA, solvent (water or methanol), and UV irradiation time. The membrane coated with a solution of AIBN/HEMA/methanol showed about 2.65 times higher water flux than that coated with a solution of AIBN/HEMA/water. The membrane coated with a solution of higher AIBN/HEMA ratio and a longer UV irradiation time exhibited a higher permeation flux. The membrane coated with a solution of lower AIBN/HEMA ratio needed a longer UV irradiation time for coating to get a same level of permeation flux. In order to have a greater permeation flux than uncoated membrane, the membrane should be coated with a solution of a certain AIBN/HEMA ratio and UV irradiation time. The fouling by oil emulsion occurred to both of the coated and the uncoated membrane. However, the fouling of coated membrane was much less than uncoated one; the water flux(0.2683g/㎠·min)through the coated membrane was about 6 times higher than that(0.0558g/㎠·min) through the uncoated membrane.