호주산 저품위 동광의 부유선별에 관한 특성조사

김준수,김우진,황하,김명준,김완태,Kim, Joon Soo,Kim, Woo Jin,Hwang, Ha,Kim, Myong Jun,Kim, Wantae 한국자원리싸이클링학회 2016 資源 리싸이클링 Vol.25 No.6

본 연구의 목적은 호주산 저품위 동광을 부유선별하여 정광으로 회수하고자 할 때, 최적의 부유선별 조건을 얻고자 하는데 있다. 본 연구에서는 저품위 동광의 파분쇄 및 분급에 의해 선별에 적절한 입자크기의 시료를 얻은 다음, 이를 대상으로 부유선별 시 포수제, 활성제, 억제제의 첨가량 및 광액의 pH 변화가 부선효율에 미치는 영향을 조사함으로써 품위가 향상된 정광을 얻고자 하였다. 본 연구실험결과 얻은 최적의 부유선별 조건은 광액산도 pH9.0, 활성제 500 g/t $CuSO_4{\cdot}5H_2O$, 포수제 500 g/t K.E.X, 억제제 1500 g/t $Na_2SO_3$, 광액농도는 25 wt.% 이었다. 최적조건하에서 얻은 정광중의 동 품위 및 회수율은 각각 4 wt.%와 65 wt.% 정도이었고 대부분 철 성분을 함유한 광물 이었다. The purpose of this study is to obtain an optimum condition of the concentrate by floatation using Australian low grade copper ore of suitable particle size by crushing, grinding and sizing. The effect of the dosage of collector, activator, depressant and change of acidity on the floatation was investigated. The floatation conditions comprising of pH 9.0 acidity, 500g/t $CuSO_4{\cdot}5H_2O$ activator, 500g/t K.E.X. collector, 1500g/t $Na_2SO_3$ depressant and 25wt.% plup density were optimized. Grade and recovery of copper in the concentrate obtained by froth floatation under optimum conditions were 4wt.% and 65wt.% respectively.

쿠싱병에 대한 경접형동접근법의 내분비학적 결과

김준수,김창진,하상수,김정훈,이정교,권병덕,홍성관,이기업,이봉재,김용재,최충곤,이호규,Kim, Joon Soo,Kim, Chang Jin,Ha, Sang Soo,Kim, Jung Hoon,Lee, Jung Gyo,Kwun, Byung Duk,Hong, Sung Kwan,Lee, Ki Up,Lee, Bong Jae,Kim, Yong Jae,Choi, Choo 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.5

Objective : We analyzed the clinical and endocrinological results of the transsphenoidal microsurgery for ACTH secreting pituitary adenomas. Marerials and Methods : From October 1995 to August 2000, 18 patients underwent transsphenoidal microsurgery for Cushing's disease. We analyzed the surgical results of 17 patients, one patient who was previously operated from other hospital was excluded. Age of the patients were 18 to 61 years old(mean 37.7), male to female ratio was 1 : 3.3, and follow-up period was 3 to 50 months(mean 20.3). The selection of candidates for transsphenoidal exploration was based on endocrinologic criteria. Magnetic resonance imaging was the preferred radiologic test. Selective inferior petrosal sinus sampling of adrenocorticotropic hormone futher refined the diagnosis when endocrinologic and radiologic procedures were not definitive. Results : Results of the preoperative endocrinological test were : level of serum ACTH 29.4 to $225{\mu}g/dL$(mean $93.88{\mu}g/dL$) ; serum cortisol 11.9 to $47.5{\mu}g/dL$(mean $27.49{\mu}g/dL$) ; 24-hour urine free cortisol 235 to $1019{\mu}g/day$(mean $571.0{\mu}g/day$). Inferior petrosal sinus sampling for ACTH was performed in 11 patients and all were confirmed by Cushing's disease and we could predict the laterality of the tumor in 9 of 11 patients. We performed transsphenoidal selective adenomectomy in 5 patients, adenomectomy and subtotal hypophysectomy in 2 patients, adenomectomy and partial hypophysectomy in 9 patients, and in the remaining one patient, hemihypophysectomy followed by total hypophysectomy due to remission failure. Fifteen of 17 patients(88.2%) showed endocrinological remission. Glucocorticoid replacement therapy was performed in all the patients who showed remission for 1 to 24 months(mean 5.9 months), and 6 patients received steroid over 6 months. Conclusion : We conclude that the direct demonstration of a tumor in the pituitary gland by MRI is the most important and definitive diagnostic tool and the location of a mass should be confirmed with increased level of ACTH by the inferior petrosal sinus sampling. Transsphenoidal microsurgery is effective treatment modality for Cushing's disease and the immediate postoperative evaluation of the surgical resection of the tumor is very important. The patients should show hypocortisolism, decreased, subnormal serum ACTH and cortisol levels and 24-hours urine free cortisol. We performed 18 transsphenoidal microsurgery for Cushing's disease in 17 patients and 15 patients(88.2%) showed endocrinological remission.

홍천산 모나자이트의 가성소다 분해 및 침출

김준수,윤호성,김성돈,김철주,이진영,Kim Joon-Soo,Yoon Ho-Sung,Kim Sung-Don,Kim Chul-Joo,Lee Jin-Young 한국자원리싸이클링학회 2004 資源 리싸이클링 Vol.13 No.4

본 연구에서는 국내 홍천산 모나자이트 정광의 가성소다 분해 및 분해산물의 염산 침출에 대한 처리조건을 확립하고자 하였다. 분해 반응의 조건은 입자크기의 -200 mesh 이하이면 적절하였고, 반응온도 $460^{\circ}C$부근에서 원활한 분해가 이루어 졌으며, 가성소다 첨가량은 NaOH/TREO mole ratio 6정도가 효과적이다. 또한 침출반응의 조건은 염산농도 8N 및 반응온도 $80^{\circ}C$이상이 침출에 적절하였으며, 반응시간 2시간 및 광액 농도 10%가 효과적이다. 그리고 최적조건하에서 모나자이트의 분해 침출율은 90%이상이였고, 부산물 형태로 인산소다 화합물은 효과적으로 회수하였으며, 희토류 원소별 분리에 적합한 시료용액을 조제하였다. In this study, treatment conditions for monazite concentrate in Hong-Cheon area deposit were studied with NaOH fritting decomposition and HCl leaching experiments. At condition of NaOH fritting decomposition, it was appropriate to adopt particle size of -200 mesh monazite, reaction temperature of about $460^{\circ}C$ and NaOH/TREO mole ratio of 6. In case of HCl leaching for decomposed product, it was appropriate to use hydrochloric acid of above 8N with leaching temperature of above $80^{\circ}C$, leaching time of 2 hrs and pulp density of about 10%. A rate of decomposition and leaching for monazite was above 90% under optimum conditions. Sodium phosphate compound was effectively recovered from NaOH decomposed solution, and mixed rare earth chloride solution was prepared with HCl leaching of decomposed product.

선형경제에서 순환경제로의 전환

김준수,전연수,전정혁,조재영,Kim, Joon Soo,Jun, Yun-Su,Jun, Jung Hyuk,Cho, Jai Young 한국자원리싸이클링학회 2021 資源 리싸이클링 Vol.30 No.3

Currently, there is a drain of natural resources, environmental contamination, generation of waste, and problems of the earth's climate by CO₂ emissions according to mass production and overconsumption of mankind. It is effectuated by a linear economy that involves manufacturing products, use, and waste repeatedly; there is no guarantee in the lives of humans and the future of the globe if we do not find alternative proposals. For a sustainable developing society and to overcome the present global problems, we must successively change to a circular economy from a linear economy. The circular economy has the concept of an extended value chain in recovery, reuse, remanufacturing, and recycling, instead of discarding after the use of manufactured goods. New business models of circular economy have been realized to save the earth ecology and sustainable developing society in serious recognition of the linear economy system. New business models are established by creating a vision and developing a program, and by renovating technology, law, and financial support through a worldwide government policy.

Acryl 고무에 대(對)하여 [기2(其二)]

김준수,Kim, Jun-Su 韓國고무學會 1973 엘라스토머 및 콤포지트 Vol.8 No.2

정제된 의미정보와 시소러스를 이용한 동형이의어 분별 시스템

김준수,옥철영,Kim Jun-Su,Ock Cheol-Young 한국정보처리학회 2005 정보처리학회논문지B Vol.12 No.7

Word Sense Disambiguation(WSD) is one of the most difficult problem in Korean information processing. We propose a WSD model with the capability to filter semantic information using the specific characteristics in dictionary dictions, and nth added information, useful to sense determination, such as statistical, distance and case information. we propose a model, which can resolve the issues resulting from the scarcity of semantic information data based on the word hierarchy system (thesaurus) developed by Ulsan University's UOU Word Intelligent Network, a dictionary-based toxicological database. Among the WSD models elaborated by this study, the one using statistical information, distance and case information along with the thesaurus (hereinafter referred to as 'SDJ-X model') performed the best. In an experiment conducted on the sense-tagged corpus consisting of 1,500,000 eojeols, provided by the Sejong project, the SDJ-X model recorded improvements over the maximum frequency word sense determination (maximum frequency determination, MFC, accuracy baseline) of $18.87\%$ ($21.73\%$ for nouns and inter-eojeot distance weights by $10.49\%$ ($8.84\%$ for nouns, $11.51\%$ for verbs). Finally, the accuracy level of the SDJ-X model was higher than that recorded by the model using only statistical information, distance and case information, without the thesaurus by a margin of $6.12\%$ ($5.29\%$ for nouns, $6.64\%$ for verbs). 단어 의미 중의성 해소는 자연언어처리 분야에 매우 중요한 부분이다. 본 논문에서는 사전 뜻풀이 특성을 이용해 기존의 의미정보를 정제하고 유용한 정보인 확률정보, 거리정보 및 격정보 등을 추가한 WSD 모델을 제안하였으며, 사전을 기반으로 구축된 "울산대학교 어휘 지능망(UOU-Word Intelligent Network: U-WIN)" 상의 단어 계층적 구조(시소러스)를 이용하여 의미정보의 자료 부족 문제를 해소하는 모델을 제시하였"다. "21세기 세종 계획"에서 제공하는 150만 어절 규모의 의미 태그 말뭉치를 대상으로 한 실험에서 최다 빈도 의미 결정(Maximum Frequence Class, MFC, 정확률 베이스라인)에 비해 $18.97\%$(명사 $21.73\%$, 동사 $17.11\%$) 정확률 향상을 보였으며, 기존의 확률 가중치와 어절 거리 가중치를 이용한 모델에 비해서는 $10.49\%$(명사 $8.84\%$, 동사 $11.51\%$)의 정확률 향상되었다. 또한 시소러스를 사용하지 않고 확률정보, 거리정보, 격정보 만을 이용한 모델에 비해 $6.12\%$(명사 $5.29\%$, 동사 $6.64\%$) 높은 정확률을 보였다.

고무제품의 내후성과 내오존성에 대하여

김준수,Kim, Jun-Su 대한타이어공업협회 1968 타이어 고무 Vol.13 No.-

Tire 및 Tube의 품질보강(品質補强)에 관(關)한 연구(硏究) (제5보(第5報)) Tire Cord 및 Butyl Tube의 물성(物性)에 대(對)하여

김준수,이명환,염홍찬,이진범,박창호,홍종명,임동호,Kim, Joon-Soo,Lee, Myung-Whan,Yum, Hong-Chan,Lee, Chin-Bum,Park, Chang-Ho,Hong, Chong-Myung,Im, Dong-Ho 韓國고무學會 1969 엘라스토머 및 콤포지트 Vol. No.

1. Physical properties of various nylon cords in a tire, both of home and foreign products are studied. The experimental data for home nylon cords appeared to be quite satisfactory for use in a tire compared with foreign nylon cords with respect to its tenacity, elongation, shrinkage and contraction. 2. Excellent results have been obtained with 50 phr carbon in butyl-carbon compounding.

접착제(接着劑)의 구성(構成)과 발전(發展)

김준수,Kim, Jun-Su 韓國고무學會 1969 엘라스토머 및 콤포지트 Vol. No.

Tire 및 Tube의 품질보강(品質補强)에 관(關)한 연구(硏究) (제7보(第7報)) 합성(合成)고무를 다량혼용(多量混用)한 각부위(各部位)의 이화학적(理化學的) 성능(性能)

김준수,이명환,염홍찬,이진범,박창호,홍종명,임동호,이해용,Kim, Joon-Soo,Lee, Myung-Whan,Yum, Hong-Chan,Lee, Chin-Bum,Park, Chang-Ho,Hong, Jong-Myung,Im, Dong-Ho,Lee, Hai-Ryong 韓國고무學會 1970 엘라스토머 및 콤포지트 Vol. No.

In vulcanizates of NR/SBR blending compounds, the physical properties decrease as the contents of SBR increase for the most part. but the abrasives showed reverse performance. However, since these conditions enough satisfy the requirements of tread, carcass and sidewall of tire, we found it was possible to take use of the quantity of SBR contained high on tire manufacturing.