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Kim, Yoongon,Noh, Yuseong,Han, Hyunsu,Bae, Jaejin,Park, Sungmin,Lee, Seungjun,Yoon, Wongeun,Kim, Ye Kyu,Ahn, Hyunwoo,Ham, Moon-Ho,Kim, Won Bae Elsevier 2019 The Journal of physics and chemistry of solids Vol.124 No.-
<P><B>Abstract</B></P> <P>In this paper, an anode material system of Co<SUB>3</SUB>O<SUB>4</SUB> nanowires composited with reduced graphene oxide (Co<SUB>3</SUB>O<SUB>4</SUB> NWs/rGO) and protected by N-doped carbon layer (Co<SUB>3</SUB>O<SUB>4</SUB> NWs/rGO@NC) was prepared for lithium ion batteries. The N-doped carbon layer could serve as stress relief matter to reduce volume changes of the Co<SUB>3</SUB>O<SUB>4</SUB> NWs/rGO during repeated charge/discharge cycles, and also enhance the reaction kinetics as a highly conductive layer between the Co<SUB>3</SUB>O<SUB>4</SUB> NWs and electrolyte. The Co<SUB>3</SUB>O<SUB>4</SUB> NWs/rGO@NC electrode delivered a high discharge capacity of ca. 995 mAh g<SUP>−1</SUP> at 0.1 C after 65 cycles, and showed a much better rate performance of 428 mAh g<SUP>−1</SUP> even at a high current rate of 5 C as compared to those of Co<SUB>3</SUB>O<SUB>4</SUB> NWs/rGO electrode (203 mAh g<SUP>−1</SUP>). The demonstrated electrochemical properties suggested that the N-doped carbon coating on the composite of Co<SUB>3</SUB>O<SUB>4</SUB> NWs and rGO could significantly enhance the durability and rate capability of the anode material for high performance lithium ion batteries.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Nitrogen atoms were reacted with defects of carbon material and doped in the lattice. </LI> <LI> N-doped carbon layer enhances the reaction kinetics between the Co<SUB>3</SUB>O<SUB>4</SUB> NWs and electrolyte. </LI> <LI> N-doped carbon coating could significantly enhance the durability and rate capability. </LI> </UL> </P>
연구개발 프로젝트에서 R&D와 마케팅 기능 간 의사소통의 성과, 추동인자, 모델: 한국 제조기업에 대한 프로젝트 수준 연구
김원근(Wongeun Kim),정태현(Taehyun Jung) 한국혁신학회 2019 한국혁신학회지 Vol.14 No.3
연구개발 부서와 타부서 간의 의사소통은 기업의 연구개발 및 신제품 개발 프로젝트의 성공에 매우 중요하다. 이에 관한 기존의 연구는 서로 다른 기업 간 횡단적 비교를 함으로써 기업 간 이질적 특성을 통제하기 어려웠다. 본 연구는 단일 기업의 72개 연구개발 프로젝트를 조사함으로써 이러한 약점을 극복하고자 하였다. 구체적으로는 연구개발 부서와 타부서(특히, 마케팅 및 상품기획) 간의 의사소통이 연구개발 결과의 제품적용에 긍정적 영향을 끼치는지 확인했다. 또한, 연구성과에 대한 평가기준의 변경이 이러한 의사소통을 추동하는 중요한 인자임을 확인했다. 나아가, 성공한 프로젝트의 마케팅-R&D 의사소통의 패턴을 미시적으로 분석하여 공통 개념 모델을 도출하였다. 본 연구는 단일 기업 내 프로젝트 수준의 미시자료를 통해 다부처 의사소통과 R&D성과와의 관계를 규명하였고, 의사소통의 추동인자와 연구개발 단계별 의사소통의 과정을 심층사례연구로 규명하였다는 점에서 학술적·실무적 의의가 있다. Communication between R&D and other functions is critical to the success of corporate R&D and new product development projects. Previous research on this issue, mostly firm-level cross-sectional comparisons, has weaknesses in controlling heterogeneity among firms. This study sought to overcome these weaknesses by examining 72 internal R&D projects of a single firm. Specifically, we found that communication between R&D and marketing has a positive effect on product application of R&D results. Besides, we found that the change of the evaluation criteria for the research performance is an essential factor for encouraging such communication. Furthermore, we have developed a common conceptual model of successful marketing-R&D communication. This study reconfirms the importance of marketing-R&D communication even within a relatively homogeneous setting and singles out an institutional arrangement as a possible managerial tool to strengthen that communication.
일라이트 치환률 및 잔골재 종류 변화에 따른 자원순환형 모르타르의 공학적 특성
김민영 ( Minyoyng Kim ),송원루 ( Yuanlou Song ),김상섭 ( Sangsup Kim ),윤원근 ( Wongeun Yoon ),한민철 ( Mincheol Han ),한천구 ( Cheongoo Han ) 한국건축시공학회 2015 한국건축시공학회 학술발표대회 논문집 Vol.15 No.1
This study has analyzed the engineering characteristics of resource-cycling mortar according to the variation of fine aggregate type using illite with high development potentials by setting the goal as developing eco-friendly construction materials. As a result, while flow has increased if recycled fine aggregate and waste refractory are used separately or mixing them adequately in case of flow and compressive strength, the flow had somewhat declined followed by illite replacement. However, the possibility of such usage is determined to be adequate if used by mixing illite, recycled fine aggregate and waste refractory properly due to the dry shrinkage effect.
미국부저병 원인체(Paenibacillus larvae)의 편모 및 아포에 대한 단일클론항체
김수연(Suyeon Kim),김창환(Changhwan Kim),김지현(Jihyun Kim),손원근(Wongeun Son),황규계(Kyu-Kye Hwang),임윤규(Yoon-Kyu Lim) 한국양봉학회 2013 韓國養蜂學會誌 Vol.28 No.5
For the control of the American foulbrood disease (AFB), a rapid and accurate diagnosis must be preceded. The immunological diagnostic methods could be applied to the inspection of bulk samples in laboratories, as well as rapid test in the field. Specific antibodies is the key of immunological diagnosis. We prepared flagella and spores antigens of Paenibacillus larvae and immunized into mouse to obtain monoclonal antibodies against each different antigens. Four of monoclonal antibodies against flagella and 4 of them against spore showed no cross reactivity not only to each other antigens but also with Mellisococcus plutonius, the causative agent of Europian foulbrood disease. Providing suitable combination of antibodies pair, the monoclonal antibodies developed in this study could be applied in development of ELISA and Immunochromatographic assay for the diagnosis of AFB in honey bee.
김용래(Yongrae Kim),이경현(Kyeonghyeon Lee),민경덕(Kyoungdoug Min),이원근(Wongeun Lee),김홍집(Hongjip Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Simulation of CAI engine was conducted in an single cylinder engine which was modified for CAI combustion. Result of CFD calculation including a direct injection during underlap provided that the mixture concentration around intake valve close had a uniform distribution. A reduced chemical kinetic mechanism was used for gasoline fuel and initial conditions (EGR and temperature) were acquired from 1-D cycle simulation. The simulation results showed that CAI combustion was occurred at the temperature of 970 K ~ 1000 K and the pressure of around 15 bar. The EGR rate had an important role for high temperature mixture but the temperature in itself was more critical for the induction of CAI combustion. EGR and mixture temperature could be adjusted by an variation of valve lift and timing.