• 한국가축번식학회지
• /
• 제10권2호
• /
• pp.145-160
• /
• 1986

Problems in the embryo transfer techniques and their practical a, pp.ication have been settle to some extent. However, with theorganic cooperation between universities and the related institutes for more active works on the training of embryo transfer technicians, quarantine procedures of embryos when they are imported and exported and the future researches related to the embryo transfer, the embryo transfer techniques in Korea will be more practically, a, pp.ied to animal industries. Universalization of embryo transfer techniques to the extent of artificial insemination will greatly contribute to the improvement of farm animals and multiplication of superior stocks and will save money by the import of relatively cheap embryos instead of expensive live animals.

• 한국콘크리트학회:학술대회논문집
• /
• 한국콘크리트학회 1993년도 봄 학술발표회 논문집
• /
• pp.12-15
• /
• 1993

Critical shortage of natural aggregate for production of concrete is developing in many urban area. At the same time increasing quantities of demolished concrete form deteriorated and obsolete structures are generated as a waste material in the same areas. The reuse of a waste concrete may settle the problems of environmental pollution and shortage of adquate aggregate, Therefore, this study is to reuse a waste concrete as aggregate for concrete, It is the purpose of this present study to investigate and analyze how the addition rates of superplasticizer and curing condition affect the properties of fresh and hardened recycled aggregate concrete comparing with those of ordinary concrete and crushed stone concrete.

• 한국콘크리트학회:학술대회논문집
• /
• 한국콘크리트학회 2001년도 봄 학술발표회 논문집
• /
• pp.641-646
• /
• 2001

Generally, when Fly-Ash was used as replacement material of cement in concrete, it might occur retardation of setting and hardening. So, it is unable to use a large amount of Fly-Ash as replacement for cement. However, if it is used as replacement material of fine aggregate in concrete, we can use a large amount of Fly-Ash and settle a problem of natural-aggregate exhaustion. Furthermore, engineering properties of High Volume Fly-Ash Concrete Is better than that of plain concrete But, the larger Fly-Ash is replaced, the more fluidity of High Volume Fly-Ash Concrete decrease, because porous organization of Fly-Ash adsorb water and Superplasticizer. In this study, after appending additional water to High Volume Fly-Ash Concrete in proportion to weight of Fly-Ash, we intend to find proper ratio which doesn't affect strength and satisfy fluidity As a result of this study, it was found that fluidity of mortar with 25~28 percentage of additional water was satisfied with fluidity of plain mortar, and compressive strength of that was similar to plain mortar's

• Journal of Information Technology Applications and Management
• /
• 제11권4호
• /
• pp.25-33
• /
• 2004

Recently, as network and computer technologies are growing rapidly, most of business transactions are performed in cyber world. In spite of many advantages, the most concerns in Electronic Commerce are the information security matters, and the cryptosystem has been claimed as one of the proper means to settle this problem. In this paper, a partial encryption/decryption algorithm has been in-troduced to show the efficiency against the conventional method in which all the data are completely encoded. In our proposed scheme, the multimedia data can be efficiently encoded in a short time providing good data security. For example, the MP3 data can be securely protected with 10% encryption in our scheme. Moreover, 1he shuffling process at the end of partial encryption procedure provides higher level of data security.

• 한국지반공학회지:지반
• /
• 제7권4호
• /
• pp.65-74
• /
• 1991

연약 지반위에 축조된 토질 구조물은 제체의 자중으로 인하여 오랜 기간 동안 침하가 계속되는 데 이는 시간의존적 거동인 압밀과 creep이 동시에 작용하여 발생된다. 본 연구에서는 삼축압축실험기를 사용한 creep실험 과정을 제안하고 creep실험을 실시하여 응력 수준에 따른 해성점토의 creep특성을 구명하였다. 또한 시료에 적합한 creep 방정식에 필요한 creep정수를 creep실험 결과를 사용하여 구하였다.

• 한국가구학회지
• /
• 제16권1호
• /
• pp.27-37
• /
• 2005

Opening 21th Century, all the Countries of the world has been focusing on build up the foundation of cultural infrastructure in a various way, since the awareness of importance for cultural design products has been turnover. For this reason, all the countries in the world, recognize that it is more important than any other things to plan to establish a structure which is suitable to the real conditions of a region in order to efficiently manage or operate their cultural environment, in particular, they think it is urgent they should contrive to develop their regional industries with new information media, introduction and spread of the up-to-date technique of design. However, our regional related industries very difficulty for the moment for them to apply new, designing technique or to settle technical bottlenecks themselves. Accordingly, in order to resolve such a structural point at issue, this study has carried the newly designed and developed, wooden, cultural craft items that were produced by utilizing the ultramodern digital technology installed at TIDIC, it would contribute to achieve some global cultural products.

• 한국항공운항학회지
• /
• 제22권1호
• /
• pp.124-129
• /
• 2014

The organization's safety culture is strongly tied to the success of its safety learning programme. All personnel must understand the concept and necessity of Safety Management System. In order to settle the culture which they are willing to share the responsibility of safety, it is essential for service provider as the airline company to develop the technique and knowledge which intenses the organization's safety and to perform safety learning programme to be applied. This study has looked into the preceding studies about the learning culture and surveyed how the airmen have acquired the safety lessons learned thru their safety promotion within aviation maintenance organization. Accordingly, it intends to contribute safety promotion by suggestion of the effective and positive learning culture thru the establishment of strategy and the safety learning programme suitable to the organization.

• 한국축산시설환경학회지
• /
• 제14권2호
• /
• pp.113-118
• /
• 2008

Sequencing batch operation consists of fill, react, settle and decant phases in the same reactor. Operation consists of anaerobic, anoxic and oxic (aerobic) phases when nutrient removal from the wastewater is desired. Since the same reactor is used for biological oxidation (or mixing) and sedimentation in aerobic and anaerobic SBR operations, capital and operating costs are lower than conventional activated sludge process and conventional anaerobic digestion process, respectively. Therefore, Aerobic SBR and Anaerobic SBR operations may be more advantageous far treatment of small volume animal wastewater in rural areas.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2008년도 추계학술대회논문집
• /
• pp.195-200
• /
• 2008

This paper presents motion control of the Inchworm composed of the piezoelectric actuators and mechanical elements. Piezoelectric actuator shows nonlinear response characteristics including hysteresis due to the ferroelectric characteristics. This paper proposes feedback control scheme to improve the ability of tracking response to complex input signal and suppress the phenomenon of hysteresis using the sliding mode control technique with the integrator. The sliding mode control system has the limit to minimize both the settle time and overshoot. For making up this limit, this paper also suggests input shaping technique suitable to the inchworm control system.

• 한국정밀공학회지
• /
• 제22권9호
• /
• pp.155-161
• /
• 2005

Up to now, a lot of unmanned demining systems have been developed. However, some inferiority surely exist by reason of their large platform and explosive mechanism. To settle this inferiority, non-explosive demining system adaptable to a mobile robot already has been developed. Brief experiment indoors showed that developed demining system can remove landmines well. But, out of doors, several problems are detected. In this research, a study on the performance improvement of developed non-explosive demining system is mainly discussed. To overcome downhill effect, mechanical sensor composed of shaft and spring is used. It is confirmed that clearance depth control using the mechanical sensor is a good solution for the inclination of the system.