국내 레미콘사의 부순모래 사용실태 조사

김기훈,金虎林,金光華,윤기원,한천구 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

Crushed sand is made by crushing the rock artificially. With the wide shortage of natural fine aggregates at all regions in Korea. crushed sand has been increasingly consumed as a alternative aggreagtes of natural sand. But there is insufficient information related to the actual situation on the produce. quality and manufacturing company of crushed sand. In this paper. survey is performed in order to know actual consumption situation of crushed sand through ready mixed concrete company in domestic. The remicon companies using crushed sand were estimated with 55%. According to the using method of crushed sand. most remicon company used fine aggregates by mixing natural sand and crushed sand. It is found that natural sand is replaced by crushed sand by about 20~50%. For quality problems in using crushed sand. grain shape. grade and fine particles shall be improved to meet the quality requirement of remicon and wide application. Therefore. it is found that quality improvement of crushed sand is required.

Minimally Invasive Transforaminal Lumbar Interbody Fusion: A Comparison Study Based on End Plate Subsidence and Cystic Change in Individuals Older and Younger than 65 Years

Lin, Guang-Xun,Quillo-Olvera, Javier,Jo, Hyun-Jin,Lee, Hyeong-Jin,Covarrubias-Rosas, Claudia Angelica,Jin, Chengzhen,Kim, Jin-Sung Elsevier 2017 World neurosurgery Vol.106 No.-

<P><B>Objective</B></P> <P>To compare the outcomes between patients older and younger than 65 years who underwent single-level minimally invasive transforaminal interbody fusion (MI-TLIF) surgery.</P> <P><B>Methods</B></P> <P>This study is a retrospective analysis of 76 patients who underwent MI-TLIF between April 2012 and June 2016. Group A consisted of 35 patients (<65 years) and group B consisted of 41 patients (≥65 years). Intraoperative data were recorded. The evaluation of clinical outcomes was based on the visual analog scale for back and leg pain and the Oswestry Disability Index. Radiologic outcomes including cage subsidence, end plate cyst formation, and fusion rate were assessed.</P> <P><B>Results</B></P> <P>The mean age of the study subjects was 65.3 years, and the mean duration of follow-up was 18.98 months. Group B had a higher rate of comorbidities compared with group A (90.24% vs. 57.14%, respectively; <I>P</I> < 0.05). There was no statistically significant difference in the rate of complications between the groups (group A, 14.29%; group B, 17.07%). Clinical outcomes significantly improved in both groups postoperatively (<I>P</I> < 0.05). Although bony fusion in group A was slightly higher than that in group B, the fusion rate was not statistically different according to age. There were no statistically significant differences in the rates of cage subsidence or positive cyst sign between the groups.</P> <P><B>Conclusions</B></P> <P>MI-TLIF presented similar safeness and acceptable outcomes and complication rate in both groups. Cyst formation may be aggravated by cage subsidence, because cage subsidence was a useful potential predictor of cyst formation.</P>

Effect of Buffer Solubility and Protein Fractionation of Grain Feeds on Fermentation, Degradability and Gas Production in vitro

Jin, Guang lin · Song, Man Kang 충북대학교 농업과학기술연구소 2013 農業科學硏究 Vol.29 No.2

본문참고

Effect of shim configuration on internal die flows for non-Newtonian coating liquids in slot coating process

Guang-Lin Jin,안원기,김시조,남재욱,정현욱,현재천 한국유변학회 2016 Korea-Australia rheology journal Vol.28 No.2

In this study, a strategy for designing optimal shim configuration inside a slot die is suggested to assure the uniform coating flow distribution of various non-Newtonian shear-thinning liquids at the die exit in a slot coating system. Flow patterns of non-Newtonian liquids inside the slot die, via three-dimensional computations, have been compared using various shim geometries which can adjust the flow region in a slot manifold. The rather non-uniform (parabolic) velocity distributions of shear-thinning liquids at the die exit under the basic shim condition could be effectively flattened by the modification of shim geometry without the change of die manifold structure. Dimensions of hybrid shims for controlling flow features at edge and center regions within slit channel are positively tuned, according to the shear-thinning level of coating liquids.

모넨신 첨가 수준이 반추위 미생물에 의한 발효성상, 메탄발생량 및 건물 분해율에 미치는 영향

Guang-Lin, Jin,지병주,Xiang-Zi, Li,Judder Shinekhuu,송만강 충북대학교 동물생명과학연구소 2008 동물생명과학연구 Vol.1 No.-

본 시험은 조사료와 농후사료의 비율 및 모넨신 첨가량이 반추위 미생물의 건물 분해율, 메탄 발생량 및 배양액의 발효성상에 미치는 영향을 평가하고자 in vitro 방법으로 실시되었다. 첨가사료의 조사료 및 농후사료의 비율은 각각 8:2, 5:5 및 2:8 로 하였으며, 모넨신의 첨가량은 0, 10, 30 및 50ppm/150ml의 수준으로 하였다. 배양액은 100ml의 반추위액과 50ml의 인공타액을 혼합하여 총 150ml로 배양하였다. 여기에 기질과 모넨신을 첨가하여 39℃에서 24시간동안 혐기적으로 배양하였다. 24시간 배양하였을 때, 건물 분해율은 농후사료 첨가수준이 증가됨에 따라 증가하였으나(P<0.001), 각 농후사료와 조사료의 첨가수준 내에서는 모넨신 첨가 및 첨가수준이 건물분해에는 영향하지 않았다. 배양 시작 3시간 후 부터 배양액 내의 pH는 농후사료 첨가수준이 증가함에 따라 뚜렷하게 낮아졌다 (P<0.001). 배양 6시간 경과하였을 때, 모넨신 첨가량이 증가됨에 따라 배양액의 pH는 증가되었다 (P<0.05). 총가스 발생량은 농후사료 첨가수준이 증가될수록 많아졌으며 (P<0.001), 이러한 현상은 전체배양기간 동안 동일하였다 (P<0.01). 메탄발생량은 총 가스 발생량과 비슷한 경향이었는데, 배양 후 9시간 경과하였을 때부터는 모넨신 첨가량이 많은 처리구에서의 메탄발생량이 현저하게 감소되었다 (P<0.01). An in vitro study was conducted to examine the effect of addition level of monensin on fermentation characteristics, methane production and dry matter degradability by mixed rumen microbes. Four levels(0ppm, 10ppm, 30ppm and 50ppm, w/v) of the monensin were added to the mixed solution of strained rumen fluid with artificial saliva(2:1, v/v) and 1,5g substrate (mixture of 80% concentrate and 20% forage) in nylon bag was placed in 150ml incubation solution, and incubated anaerobically for 24hours at 39℃. pH in incubation solution increased up to 1h incubation but decreased with incubation time thereafter for all the treatments. Ammonia-N concentration increased with time for all the treatments. However, pH and ammonia concentration were not influenced by added monensin levels. Total VFA concentration increased (P<0.01) with the decreasing monensin level at 3 and 6h incubations, although there was no significant difference between treatments at 24h incubations. The propionate proportion increased (P<0.05), but acetate and butyrate decreased (P<0.01) with monensin at 3 and 6h incubations. C₂2/C₃ ratio was decreased (P<0.05) by increasing the monensin levels at 3 and 6h incubations. The methane production decreased (P<0.05) as the monensin levels increased at 24h incubations. Dry matter degradation of the substrate was not affected by the monensin addition.

사료작물 사일리지의 단백질 분획 및 Borate-phosphate Buffer 추출이 In vitro 발효성상, Gas 발생 그리고 분해율에 미치는 효과

김광림 ( Guang Lin Jin ),지병주 ( Byung Ju Ji ),오영균 ( Young Kyoon Oh ),홍성구 ( Seong Ku Hong ),송만강 ( Man Kang Song ),Judder Shinekhuu,Xiang Zi Li 한국동물자원과학회 2009 한국축산학회지 Vol.51 No.5

조사료 자원의 단백질 분획 및 Buffer 추출이 In Vitro 발효 성상, 분해율 및 Gas 생성량에 미치는 효과

김광림(Guang Lin Jin),Judder Shinekhuu,Wei-ze Qin,김종규(Jong Kyu Kim),주종관(Jong Kwan Ju),서성원(Seong-won Suh),송만강(Man Kang Song) 한국초지조사료학회 2012 한국초지조사료학회지 Vol.32 No.1

Buffer solubility and protein fractionation were evaluated from the hays (timothy, alfalfa and klein) and straws (tall fescue and rice), and in vitro trial was conducted to examine the effect of buffer extraction on fermentation characteristics, degradability and gas (CO₂ and CH₄) production. Buffer soluble protein (SP) content and A fraction in total protein were highest in alfalfa hay as 61% and 41.77%, respectively while lowest in rice straw (42.8% and 19.78%, respectively). No difference was observed in B1 fraction among forages but B2 fraction was slightly increased in klein hay (12.34%) and tall fescue straw (10.05%) compared with other forages (6.34~8.85%). B3 fraction of tall fescue was highest as 38.49% without difference among other forages while C fraction was highest in rice straw. pH in incubation solution was higher in all forages after extraction than before extraction at 3h (P<0.01) and 6h (P<0.05), and pH from hays of timothy and alfalfa was higher than the other forages at 6h (P<0.05) and 12h (P<0.001). Regardless of extraction, ammonia-N concentration from alfalfa hay was increased at all incubation times and extraction effect was appeared only at 3h incubation time (P<0.01). Total VFA concentration from alfalfa hay was highest up to 24h incubation while those from tall fescue straw and rice straw were lowest. Buffer extraction decreased (P<0.01~P<0.001) the total VFA concentration. Acetic acid proportion was increased (P<0.001) before extraction of forages but no difference was found between forages. Propionic acid(C3) proportion was also increased(P<0.001) before extraction in all forages than in straws at 3h, 24h and 48h incubations, and C₃ from hays were mostly higher (P<0.05) than from straws. Butyric acid proportion, however, was not affected by extraction at most incubation times. Parameter 'a' regarding to the dry matter (DM) degradation was increase (P<0.001) in all forages before extraction, and was decreased (P<0.05) in tall fescue straw and rice straw compared with hays. Parameter 'b' was also increased (P<0.001) before extraction but no difference was found between forages. Effective degradability of DM (EDDM) was higher (P<0.001) before extraction in most forages except for rice straw. Buffer extraction decreased (P<0.05) all parameters (a, b, and c) regrading to the crude protein (CP) degradation but no difference was found between forages. Effective degradation of CP (EDCP) was lower (P<0.05) in straws than in hays. Parameters 'a' and 'b' regarding to the NDF degradation (P<0.01) and effective degradability of NDF (EDNDF, P<0.001) were also higher in forages before extraction than after extraction but no difference was found between forages. Buffer extraction reduced (P<0.05~P<0.001) CO₂ production from all the forages uo to 24h incubation and its production was greater (P<0.05~P<0.01) from hays than straws. Methane (CH₄) production was also greater (P<0.01~P<0.001) in all forages at all incubation times, and its production was greater (P<0.05) from hays than from straws at most incubation times. Based on the results of the current study, it can be concluded that buffer solubility and CP fractionation might be closely related with in vitro VFA concentration, degradability and gas (CO₂ and CH₄) production. Thus, measurement of buffer solubility and protein fractionation of forages might be useful to improve TMR availability in the ruminants.

[발표·PRESENTATION] 한류와 해외교포사회 및 북한

김광림(Jin, Guang Lin) 전남대학교 글로벌디아스포라연구소 2015 전남대학교 세계한상문화연구단 국제학술회의 Vol.2015 No.6

Effects of Buffer Extraction of Protein Feeds on In Vitro Fermentation Characteristics, Degradation and Methane Production by Rumen Microbes

Seong-Ho Choi,Guang-Lin Jin,Wei-Ze Qin,Sun-Sik Chang,Joon Jeong,Man-Kang Song 경상대학교 농업생명과학연구원 2015 농업생명과학연구 Vol.49 No.6

The present in vitro study was conducted to examine the effect of buffer solubility of eight protein feeds (coconut meal, distillers grain, sesame meal, perilla meal, soy source cake, rape seed meal, soybean meal and lupine) on the fermentation characteristics, degradability of dry matter (DM) and crude protein (CP), and methane (CH4) production by rumen microbes. Buffer extraction increased pH (P<0.05 ~ p<0.001) of the culture solution but tended to lower ammonia- N concentration for all protein feeds. Total volatile fatty acids(VFAs) and each VFAs concentrations in all incubation was decreased by buffer extraction (P<0.01 ~ P<0.001). Also, molar proportion of acetate in 1h (P<0.001), 3h (P<0.01) and 12h (P<0.05) incubations and molar proportion of propionate in 1h (P<0.001), 3h (P<0.01), 6h (P<0.05) and 12h (P<0.05) were decreased by buffer extraction. But molar proportion of butyrate in 1h (P<0.001), 3h (P<0.01) and 6h (P<0.05) were increased by buffer extraction. The in vitro effective degradability of dry matter (P<0.001) and CP (P<0.001) was decreased by buffer extraction. The methane production (P<0.01~P<0.001) in all incubation was decreased by buffer extraction. The results from in the current study might be useful for diet formulation to improve the feed efficiency of the ruminant animals without massive loss of major nutrients.

Assessment of Landslide Susceptibility using the PCA and ANFIS with Various Metaheuristic Algorithms

Zelu Chen,Hechun Quan,Ri Jin,Aifen Jin,Zhehao Lin,Guangri Jin,Guang-Zhu Jin 대한토목학회 2024 KSCE Journal of Civil Engineering Vol.28 No.4

It is very important for the susceptibility assessment and disaster prediction of the region to effectively evaluate the landslide susceptibility. In this study, Particle Swarm Optimization (PSO), Artificial Bee Colony algorithm (ABC), Shuffled Frog Leaping Algorithm (SFLA) and Bat algorithm (BAT) are used to optimize Adaptive Neuro-Fuzzy Inference System (ANFIS) to evaluate the landslide susceptibility. 811 sample points were collected through remote sensing analysis and field investigation for susceptibility analysis. Fifteen landslide evaluation factors were quantified and normalized, and the Principal Component Analysis (PCA) method was used to compress them into 6 main factors. The accuracy analysis results of the area under the curve (AUC), Root Mean Square Error (RMSE) and Mean Absolute Error (MAE) evaluation models show that the AUC values of PSO, ABC, SFLA and BAT are 93.6%, 96.2%, 90.8% and 86.1%, respectively. Among them, the accuracy of ABC is the highest. This study effectively evaluates the landslide susceptibility through a new neural network hybrid method, which provides a theoretical basis for landslide disaster susceptibility management.