깔짚 두께가 한우사 바닥환경과 생산성에 미치는 영향

김승기,박병기,안준상,박명호,라창식,신종서,Kim, Seung-Gi,Park, Byung-Ki,An, Jun-Sang,Park, Myung-Ho,Ra, Chang-Six,Shin, Jong-Suh 한국축산환경학회 2012 축산시설환경학회지 Vol.18 No.suppl.

본 연구는 깔짚 두께가 한우의 사료섭취량, 혈액성상 및 바닥 환경에 미치는 영향을 검토하기 위해 수행되었다. 사료 섭취량은 깔짚의 두께가 얇은 것보다 두꺼울 때 증가되는 경향을 보였다. 깔짚 두께의 증가는 혈중 total protein, HDL-cholesterol, LDL-cholesterol 및 GGT 농도에 긍정적인 영향을 미쳤다. 깔짚의 수분 함량 및 대장균수는 깔짚의 두께 10 cm 보다 15 및 20 cm에서 뚜렷하게 낮은 결과를 보였다. 따라서 한우의 건강과 생산성 향상을 위해서는 깔짚의 두께는 20 cm 정도가 이상적이며, 최소한 깔짚의 두께는 15 cm 이상을 유지하는 것이 바람직한 것으로 판단된다. This study was conducted to investigate the effects of bedding thickness of sawdust on feed intake, blood metabolites concentration and environmental condition of cowshed floor for Hanwoo. Feed intake was increased at thicker bedding groups (15 or 20cm), compared with thinner bedding group (10cm). The thicker bedding had a positive effect on concentration of serum total protein, high density lipoprotein (HDL)-cholesterol, low density lipoprotein (LDL)-cholesterol and ${\gamma}$-glutamyltransferase (GGT). Moisture content and the number of E. Coli in the bedding material were remarkably lower in 15 and 20 cm groups, compared with 10 cm group. Based on the data obtained in this study, approximately 20 cm bedding thickness or at least over 15 cm would be maintained to improve the health condition of Hanwoo and hence to enhance the productivity.

기증자 이야기

김승기,노희령,남삼현,류대열,임지연,신봉식,Kim, Seung-Gi,No, Hui-Ryeong,Nam, Sam-Hyeon,Ryu, Dae-Yeol,Im, Ji-Yeon,Sin, Bong-Sik 한국조혈모세포은행협회 2002 나누는사람들 Vol.21 No.-

환경생태유량 취약성 평가 및 자연유황 회복을 위한 환경생태유량 산정 기술

김승기,강형식,전동진,Kim, Seung-Gi,Gang, Hyeong-Sik,Jeon, Dong-Jin 한국수자원학회 2020 물과 미래(한국수자원학회지) Vol.53 No.9

대일항쟁기 한국인의 항일 독립전쟁사상 연구

김승기 ( Kim Seung-gi ) 한국군사학회 2021 군사논단 Vol.105 No.-

The purpose of this paper is to clarify the formation process, contents, achievements, and significance of the anti-Japanese’ war of independence ideology of Koreans who had to restore the countrys independence from the Japanese colonial strength in the period of the Anti-Japanese struggle (1894-1945). The period of study is from 1894, when the Japanese troops inflicted an upset, to 1920, when the Battle of Bongo-dong and the Battle of Cheongsan-ri occurred. The anti-Japanese Rightous Army struggle and the patriotic enlightenment movement were the two pillars of the independence movement for the restoration of national power and salvation. The New People’s Society, Korean name ‘Shinminhoe’, a representative independence movement organization in the period of the Anti-Japanese struggle, created the Anti-Japanese War of Independence Idea and the War of Independence Strategy’ by dialectically integrating conflicting two ideas, the anti-Japanese Rightous Army struggle idea and the patriotic enlightenment movement idea. From this point of view, it can be said that the Shinminhoe made a remarkable contribution to the history of the Korean people's anti-Japanese war of independence. The core content of the War of Independence Strategy of the New People’s Society is to locate an independent army base in the Manchuria area of Qing Dynasty, which is not covered by Japanese rule, and buy a certain area of land there to build a new Korean village. and establish some military schools to nurture independent army, establish independence army and train them, and seize the best opportunity and start a war of independence to achieve independence on their own. The New People’s Society led the movement to build an overseas independence base after Korea-Japan Consolidation Treaty, and became the driving force of waging the war of independence of the Independence Army in Manchuria. In addition, a number of the New People’s Society executives participated in key positions of the Provisional Government of the Republic of Korea, and adopted the Armed War of Independence Route as a government policy, and contributed significantly to the liberation of the motherland by guiding and controlling the Independence Army in Manchuria and the Korean Independence Army.

간동맥 화학색전술 후 풍선형 지혈기구의 유용성

김승기(Kim Seung-Gi) 대한방사선과학회(구 대한방사선기술학회) 2019 방사선기술과학 Vol.42 No.3

Transarterial chemoembolization is one of the most representative procedures for puncture of the femoral artery. In addition, the same procedure is often repeatedly performed many times, and Hepatocellular carcinoma patients due to cancer is significantly lowered blood tests, regardless of platelet counts are not good enough to stop bleeding. More importantly, hepatocellular carcinoma has a high degree of complication and disease severity, which makes it less likely that the condition of the body will be relatively inferior to other patients. In order to prevent delayed hemorrhage of the femoral artery puncture site after the procedure, it is advised to absolutely stabilize the limb so that it does not bend the limb for 3 hours after climbing in the ward. Therefore, I have been complaining about inconvenience. In addition, in order to prevent delayed hemorrhage after hemostasis, balloon type hemostatic device was used instead of sand bag which was placed on hemostatic site. The results of this study were compared with the results of actual application. The use of a balloon-type hemostatic device to increase the effectiveness of continuous hemostasis and to minimize the inconvenience during the time of patient s absolute bed rest, rather than raising the sandbag to prevent primary delayed hemorrhage by various methods in transarterial chemoembolization. It can be used as a substitute for existing sand bags because it can alleviate pain, increase satisfaction, and can be used as a disposable one.

자동 사료 급이 로봇과 초음파 장애물 분류 시스템

김승기(Seung-Gi Kim),이용찬(Yong-Chan Lee),안성수(Sung-Su Ahn),이연정(Yun-Jung Lee) 대한전기학회 2018 전기학회논문지 Vol.67 No.8

In this paper, we propose an autonomous feeding robot and its obstacle classification system using ultrasonic sensors to secure the driving safety of the robot and efficient feeding operation. The developed feeding robot is verified by operation experiments in a cattle shed. In the proposed classification algorithm, not only the maximum amplitude of the ultrasonic echo signal but also two gradients of the signal and the variation of amplitude are considered as the feature parameters for object classification. The experimental results show the efficiency of the proposed classification method based on the Support Vector Machine, which is able to classify objects or obstacles such as a human, a cow, a fence and a wall.

NC Machining Load Adaptive Control Using Tool Feed Rates

김승기(Seung-Gi Kim),허은영(Eun-Youn Heo),이희관(Hee-Gwan Lee),박점종(Jum-Jong Park),김동원(Dong-Won Kim) Korean Society for Precision Engineering 2022 한국정밀공학회지 Vol.39 No.2

NC machining data, which cause excessive cutting force, accelerate tool wear, reduce the roughness of machined surfaces, and in severe cases, result in tool breakage and material waste. Thus, the cutting conditions should be optimized according to the material-spindle speed-feed rate combination. However, it is very difficult to perfectly predict and optimize the dynamic characteristics of machining, such as tool vibration and wear, and spindle thermal deformation. Further, predicted tool paths are accompanied by machining errors. This study proposes an advanced adaptive control method that can balance the machining load, improve tool life, and reduce machining time. The proposed method 1) synchronizes the spindle load and NC-data and stores it, 2) analyzes the stored data to create a reference curve that can balance the machining load, 3) adjusts the tool feed rate using a reference curve, 4) engages rapid traverse when the load is small, and 5) applies an approach feed rate when the tool approaches a workpiece, reducing the impact on the tool when the tool meets the workpiece. Case examples proved that the use of the proposed balanced load reduced machining time and increased tool life.

동맥천자 인터벤션 시술 후 지속지혈 안전성에 대한 연구

김승기(Kim Seung-Gi) 대한방사선과학회(구 대한방사선기술학회) 2019 방사선기술과학 Vol.42 No.3

Most of the vascular procedures performed for various diagnoses and treatments of various abdominal intervention procedures performed by the Department of Radiology and Angiography are performed by puncture of the femoral artery. For this reason, patients should undergo blood-related tests such as prothrombin time (PT) and partial thromboplatin time (PTT). Therefore, many patients are instructed to take precautions such as putting a sandbag on the puncture site to prevent delayed hemorrhage after hemostasis of the femoral artery puncture site, and not to bend the leg of the treated area for about 3 hours. Because of this, many patients have complained of pain during the procedure and inconvenience during the absolute bed rest time in the ward. The purpose of this study was to compare the safety of balloon ancillary devices with sandbags placed on the hemostasis site to prevent delayed hemorrhage after arterial puncture. We compared the safety of each patient with the results of medical records in consideration of the problem that the patient could not press with the focus, the position of the patient was changed depending on the patient s body shape, and the problem of falling down according to the location of the puncture site. As a result, the use of a balloon type ancillary device improves the effect of continuous hemostasis, reduces discomfort during the patient s absolute stabilization time, increases the patient s satisfaction, and is a good alternative to the existing sandbag.

북한의 핵무장과 대남 선군강압전략 연구 - 북한의 천안함 및 연평도 도발 전략 사례연구 -

김승기 ( Kim Seung Gi ) 한국군사학회 2016 군사논단 Vol.88 No.-

The purpose of this paper is to analyze the strategy of North Korea displayed during the 1^st and 2^nd Nuclear Experiments and the provocations regarding the torpedoing of Cheonan naval corvette and the shelling of Yeonpyeong Island in the perspective of `Coercive Strategy`, and thereby evaluate their threats and provide a policy alternative to establish a responsive strategy of the ROK. North Korea`s military-first coercive strategy can be evaluated as a crisis and dispute time strategy of the national security strategy (Grand Strategy) level encompassing political, diplomatic, and military strategic factors. Factors of political strategy include the fact that military-first coercive strategy seeks to further North Korea`s political end. In conclusion, considering the characteristics of North Korea`s military-first coercive strategy, it seems that the two pillars of the Kim Jung-eun regime is `nuclear deterrence` and `a leader centered, military-first governing system`. These two pillars are North Korea`s strategic center of gravity, and Archiles tendon as well. Therefore, the objective of ROK`s national security strategy in order to counter security threats of North Korea will have to be concentrated on eliminating or weakening North Korea`s strategic center of gravity.

고압절삭유를 이용한 인코넬 718 절삭가공의 공구마모 분석

김승기(Seung-Gi Kim),양기동(Gi-Dong Yang),박경희(Kyung-Hee Park),최헌종(Honzong Choi),이동윤(Dong-Yoon Lee) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11

Despite of low machinability of Inconel 718, its demand keeps increasing and many researches on the improvement of Inconel 718 machinability are being presented recently. The most serious problem on machining Nickel-based alloys is known to competitively short tool life. Many studies pointed out that the extremely high temperature near the cutting edge of a tool caused the short tool life. High pressure coolant was introduced as a good strategy for cooling the cutting tool edge, which could increase the cutting tool life. This paper presents the experimental results of milling Inconel 718 with high pressure coolant focusing on tool wear characteristics. Flank wear of used cutting tools after machining in various cutting conditions are measured and compared. General flood coolant case and high pressure coolant case are mainly compared. Uncoated insert case and PVD coated insert case are also compared and the wear maps for each case are presented. The experimental results show that the tool wear decreases 23% in the case of high pressure coolant case with PVD coated inserts, that is, tool life increases 11% in the same cutting condition.