Clinical Values of Whole-Body Blood Pool Scans and SPECT for Evaluation of Congenital Vascular Malformation

손준익 대한핵의학회 2024 핵의학 분자영상 Vol.58 No.2

Purpose This study examines the diagnostic potential of whole-body blood pool scintigraphy (WBBPS) using technetium-99 m-labeled red blood cells to detect congenital vascular malformations (CVMs). It aims to compare its efficacy withtraditional imaging techniques such as magnetic resonance imaging (MRI) and ultrasonography (USG), emphasizing itspotential advantages in terms of characterization of lesions and capacity for whole-body assessment. Methods The efficacy of WBBPS and single-photon emission computed tomography (SPECT)/computed tomography (CT)imaging in diagnosing CVMs, comparing them with USG and MRI results, was evaluated in this retrospective study. Of the38 patients, 21 were evaluated using these diagnostic methods, with CVMs classified according to the International Societyfor the Study of Vascular Anomalies guidelines. Also, this study aimed to elucidate the characteristics between WBBPS,SPECT/CT, USG, or MRI findings and their consistency with the final diagnosis. Results A total of 21 participants were included in this study, with an average age of 17.7 years old, with female predominance(57.1%). The most common diagnosis was vascular malformations (VMs) (71.4%), followed by combined vascularmalformations (14.3%) and lymphatic malformations (9.5%). WBBPS demonstrated positive results in 95.2% of cases. Distinct imaging patterns for each condition were observed, with WBBPS being crucial in locating lesions. Conclusion The study findings suggested that WBBPS with SPECT/CT could be helpful in detecting occult VM lesions andruling out a lymphatic malformation diagnosis. Thus, it can be employed in the evaluation of CVMs.

열분해 반응온도에 따른 하수슬러지의 유해물질 특성변화

손준익,홍용희,조성진,유흥민,김기헌 한국폐기물자원순환학회 2013 한국폐기물자원순환학회지 Vol.30 No.6

This paper analyzed thermal and carbonization properties of sewage sludge in fixed bed reactor and obtained following results. The heavy metal (Pb, Ni, Mn, Cr, Cu) content of Char showed the highest level at unprocessed sewage sludge, followed by carbonized sludge at 600, 400, and 500oC. It was thought to be mainly due to the yield of char rather than the influence of temperature. Also, the migration-test results of heavy metals satisfied the landfill directive in all samples, which may be possible to use it as landfill cover materials. The concentration of dioxin by changes of pyrolysis temperature was higher in the low temperature conditions and the proportion of PCDDs was higher than that of PCDFs.

무창육성돈사의 환기시스템에 따른 환기효율 평가

손준익,최홍림 한국동물자원과학회 2002 한국축산학회지 Vol.44 No.1

본 실험은 우리 나라의 양돈농가에서 노동력 절감이라는 이점 때문에 자돈사 및 분만사의 무창돈사는 일반농가에까지 보급되고 있으나, 육성·비육돈사에 있어서 무창돈사는 거의 전무한 실정으로 질병의 근원적인 차단 및 관리를 위하여 지금까지 회피되어 왔던 무창 육성·비육돈사의 활성화를 위하여 환기시스템을 자체적으로 고안하여 최적의 환기시스템을 여름철 및 겨울철로 구분하여 건축하였으며, 자체적으로 고안한 환기시스템의 성능을 평가하고자 겨울철 및 여름철로 구분하여 시험한 결과를 요약하면 다음과 같다. 1. 무창 육성·비육돈사에 있어서 돼지 생활공간(하부) 지점에서의 공기유속은 겨울철 최소환기 수준(1,440 ㎥/h)으로 하였을 때 0∼0.19 m/s 였으며, 여름철 최대환기 수준(24,000 ㎥/h)에서는 0.07∼0.42 m/s로 분포되어 여름철 및 겨울철의 무창돈사내 공기유속으로 보아 환기시스템이 우수하였다. 이상의 실험결과를 종합해 보면 무창 육성·비육사의 환기시스템은 여름철 때는 측벽을 통한 환기와 겨울철은 천장을 통한 환기시스템이 적합하다고 판단되었으며, 한쪽 측벽에 의한 배기시스템이라도 입기구는 양쪽 측벽을 통한 입기가 우수하다는 것을 알 수 있었다. An experiment was conducted to evaluate a ventilation system, which was devised to encourage farmers to use the enclosed growing and finishing pig housing system. A roof-air-entry ventilation system in winter and a side-wall-air-entry system in summer were evaluated. Air flow rate on the floor level which is the low part of pen and the living area of pigs in the enclosed growing and finishing pig house during winter was measured at 0 to 0.19 m/s at the minimum ventilation efficiency of 1,440 ㎥/h. During summer the air flow rate was detected at 0.07 to 0.42 m/s at the maximum bentilation efficiency of 24,000 ㎥/h. Therefore, it is concluded that the side-wall ventilation system is suitable for growing and finishing pigs in the enclosed house during the days of mid-summer and the roof-ventilation system was suitable during the coldest days of mid-winter. In addition, although the enclosed pig house has the system in which air exhausts through only one side wall, air should enter through both-side walls for the better ventilation performance.

MBT시설 고형연료의 Fluff type 전환에 따른 에너지 절감효과 비교분석

손준익,홍용희,김영란,박재성,오길종,김기헌 한국폐기물자원순환학회 2014 한국폐기물자원순환학회지 Vol.31 No.3

In order to cope with resource depletion and global warming, many countries around the world are seeking the technicaland political alternatives and are focusing on production of refuse derived fuel (SRF) as a viable approach. SRF isclassified into pellet SRF and fluff SRF based on the shape. In domestic trend, Pellet RDF has been mainly produceduntil now, but as the quality standard of fluff SRF was set up lately, it is expected to raise supply and demand on FluffSRF after this. Fluff SRF is a solid fuel not to be processed pelletizing step, and has advantages that manufacturing processis simple and economical. In this paper, we selected 3 MBT plants to produce Pellet SRF in Korea and examined reductioneffects of energy and CO2 emission by conversion of pellet SRF to fluff SRF. As a result, the saving energy by theconversion of SRF type is 2,509 Gcal/yr (A), 1,716 Gcal/yr (B) and 1,210 Gcal/yr (C) respectively, and the reductionrate of energy consumption in full process is about 23%~26% by comparison with pellet SRF. Also, the average ofreduction of CO2 emission per unit of MSW is 0.0272 tCO2/ton. After estimating the reduction of CO2 emission of 9MBT plants in Korea, based on the results of a survey of target plants, we concluded that the reduction effect of CO2emission is created 11,374 tCO2/yr.

經營者의 社會的 責任

孫俊益 충남대학교 법경대학 경영동우회 1969 經友論集 Vol.2 No.-

폐기물처리시설 세부검사방법 및 기준 마련 - 소각시설, 소각열회수시설, 시멘트소성로 등 열처리시설 중심으로 -

손준익 한국열환경공학회 2021 한국열환경공학회 학술대회지 Vol.2021 No.추계

매설관 하부지반-보강재 상호작용의 수치모델 연구

손준익,정하익 한국전산구조공학회 1991 한국전산구조공학회논문집 Vol.4 No.3

본 논문에서는 유한요소해석을 통하여 부등침하를 받는 매설관 기초지반 보강의 적용성과 지반보강 상호작용에 의하여 매설관 연결부 하부에서의 부등침하를 최소화 할 수 있는 방안에 관하여 다루었다. 매설관의 일단이 구조물에 고정되어 있는 경계조건에 대하여 상호비교하여 지반보강에 따른 응력전이 효과와 이로인한 배설관 침하억제 효과를 수치적으로 분석하였다. This paper reports the application study of the ground reinforcement under a buried pipeline subjected to differential settlement via a finite element modeling. The soil-reinforcement interaction helps to minimize the differential settlement between the adjoining pipe segments. The settlement pattern and deformation slope of a pipeline have been evaluated for a boundary condition at the joint between a rigid structure and a pipeline. The analysis results are compared for both non-reinforced and reinforced cases to numerically evaluate the stress transfer mechanism and the effectiveness of the soil reinforcement for restraining the settlement of the pipeline.

부등침하를 받는 매설관 기초지반 보강 모델링 연구

손준익,홍성완 한국지반공학회 1991 대한토질공학회지 Vol.7 No.1

본 논문은 매설관 기초지반 보강의 적용성에 관해 연구한 것이다. 지반 보강상호작용해석에 의하여 연결된 파이프 부재 사이의 부등침하를 최소화 하고 이음부에 발생하는 응력집중 현상을 감소시킬 수가 있다. 부등침하를 받는 매설관 하부의 침하형태와 토압의 변화 형태, 그리고 보강재의 변형 형태를 분석하였다. 매설관은 일단은 구조물에 고정되어 있고 타단은 지반속에 매설된채 자유로 되어 있으며 지표면에 재하된 일정한 등분포 하중을 받는다. 실내모형실험과 유한요소 해석을 병행 하였으며, 해석결과를 비보강과 보강 조건에 대하여 상호비교하여 매설관 침하억제를 위한 지반보 강의 효과를 검토하였다. This paper reports the application study of the ground reinforcement under a pipe joint. The soil-reinforcement interaction helps to minimize the stress concentration at joint. The settlement pattern and the earth pressure variation have been evaluated under the pipeline subjected to differential settlement. The pipeline is fixed at one side with the other side set free being loaded with a uniform surface loading. The problem has been studied by means of laboratory model test and flite element technique, and the analysis results are compared for both non-reinforced and reinforced cases to evaluate the effectiveness of the soil reinforcement for restraining the settlement of the pipeline.

생활폐기물 소각시설의 저위발열량 산정식 마련에 관한 연구

손준익,강준구,권영현,권은혜,김기헌,전태완,신선경 한국폐기물자원순환학회(구 한국폐기물학회) 2016 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2016 No.-

폐기물의 저위발열량은 처리폐기물에 포함된 연간에너지를 산출하는 기초단위로서 저위발열량의 정확성에 따라 에너지회수율 산정의 신뢰도가 좌우된다. 또한, 저위발열량은 폐기물 소각시설의 효율성 등과 관련된 매개변수에 영향을 미치는 가장 중요한 요소로서 삼성분(회분/수분/가연분) 분석법, Dulong 산정식(원소분석법, C/H/O/N/S/Cl), 발열량계(시료 1g 실측) 분석법 등을 이용하여 산정하고 있으나 산정방법에 따라 발열량 편차가 크게 나타난다. 따라서 연간 투입되는 폐기물에 대하여 정형화된 산정식(Net Calorific Value)을 이용하고 있는 EU을 바탕으로 국내 생활폐기물 소각시설에 적합한 정형화된 저위발열량 산정식을 도출하고 사용에 대하여 검토하였다. EU에서는 50개(주로 독일)의 생활폐기물(Municipal Solid Waste) 소각시설을 대상으로 입열량과 출열량에 대한 측정 및 추정결과를 바탕으로 저위발열량 산정식(NCV)을 도출하였다. EU의 NCV 산정식은 매우 간단하지만 신뢰할 만한(±5%) 계산방법으로서 보일러 효율 및 열손실(증기 흡수열, 배출가스 보유열, 바닥재 열손실 등)이 고려되었다. 이에 본 연구에서는 생활폐기물 소각시설 53개소를 대상으로 폐기물 투입량, 보조연료 공급량, 보일러 증기생산량 등의 1년간 운영 데이터와 현장측정 당일의 운영 데이터를 조사하였다. 측정·조사 결과와 EU의 NCV산정식을 바탕으로 「KS B 6205 육상용 보일러의 열정산방식」을 이용하여 식 (2)와 같은 저위발열량 산정식을 도출하였으며, 국내 실정에 맞게 산정식을 단순화하여 식 (3)과 같이 나타내었다.

회분식 열분해 공정을 이용한 폐플라스틱류 오일화 및 오염물질 배출특성

손준익,김기헌,홍용희,황동건,오길종 한국폐기물자원순환학회 2014 한국폐기물자원순환학회지 Vol.31 No.6

In this study those currently operating pyrolysis oil plant were selected for the investigation. The yield of the oil andfuel was assessed for its use as fuel and the char component analysis, and the reaction time to collect contaminantscollected and analyzed. As the result, about 40% of the oil was yielded and oil could be used as an alternative fuel. Char’sleaching test analysis result was satisfied with the landfill standard. And emission of Dioxin and pollutants was analyzed.The highest concentration of dioxin was 0.7347ng I-TEQ/Sm3. The result satisfied the requirement however the emissionconcentration was changed depending on the input Fuel. Therefore the appropriate pollution control facility should berequired.