본 연구는 독일, 영국, 호주의 선진 사례를 바탕으로 국내의 스포츠를 통한 국제개발협력의 질적 고도화를 위한 정책적 시사점을 도출하는 데 목적이 있다. 복합적 자료 수집을 기반으로 각국의 관련 정책과 주요 프 로그램에 대해 질적 문헌 분석을 수행하였다. 각국은 중장기정책 및 프 레임워크를 통해 스포츠를 통한 국제개발협력의 방향과 세부 과제를 제 시하고 UN의 SDGs 이행과 국익에 부합하는 프로그램을 실행한다. 또 한, 상이한 거버넌스를 바탕으로 공여국, 파트너 조직 및 지역사회와의 긴밀한 협력 속에서 수요자 중심의 프로그램을 제공한다. 따라서, 한국은 외교부와 KOICA를 중심으로 다양한 이해관계자와의 협력적 거버넌스 체 계를 구축하고 SDGs 달성을 위한 정책 수립이 필요하다. 마지막으로 수 원국과 그 지역사회의 관심사에 초점을 맞추고 현지화를 고려한 수요자 중심의 프로그램을 발굴하는 것이 바람직하다.

H13 tool steels are widely used as metallic mold materials due to their high hardness and thermal stability. Recently, many studies are undertaken to satisfy the demands for manufacturing the complex shape of the mold using a 3D printing technique. It is reported that the mechanical properties of 3D printed materials are lower than those of commercial forged alloys owing to micropores. In this study, we investigate the effect of microstructures and defects on mechanical properties in the 3D printed H13 tool steels. H13 tool steel is fabricated using a selective laser melting(SLM) process with a scan speed of 200 mm/ s and a layer thickness of 25 μm. Microstructures are observed and porosities are measured by optical and scanning electron microscopy in the X-, Y-, and Z-directions with various the build heights. Tiny keyhole type pores are observed with a porosity of 0.4%, which shows the lowest porosity in the center region. The measured Vickers hardness is around 550 HV and the yield and tensile strength are 1400 and 1700 MPa, respectively. The tensile properties are predicted using two empirical equations through the measured values of the Vickers hardness. The prediction of tensile strength has high accuracy with the experimental data of the 3D printed H13 tool steel. The effects of porosities and unmelted powders on mechanical properties are also elucidated by the metallic fractography analysis to understand tensile and fracture behavior.

In this paper, we describe the proposed KVN (Korean VLBI Network) clock system in order to make the observation of the VLBI effectively. In general, the GPS system is widely used for the time information in the single dish observation. In the case of VLBI observation, a very high precise frequency standard is needed to perform the observation in accordance with the observation frequency using the radio telescope with over 100km distance. The objective of the high precise clock system is to insert the time-tagging information to the observed data and to synchronize it with the same clock in overall equipments which used in station. The AHM (Active Hydrogen Maser) and clock system are basically used as a frequency standard equipments at VLBI station. This system is also adopted in KVN. The proposed KVN clock system at each station consists of the AHM, GPS time comparator, standard clock system, time distributor, and frequency standard distributor. The basic experiments were performed to check the AHM system specification and to verify the effectiveness of implemented KVN clock system. In this paper, we briefly introduce the KVN clock system configuration and experimental results.