• Asia pacific journal of information systems
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• 제29권3호
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• pp.489-502
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• 2019

The WeChat mini program is an application embedded in WeChat that users can use without downloading and installing. After it was officially released in 2017, many travel enterprises have launched their own mini programs on the WeChat platform. This study applies affordance theory to investigate the WeChat mini program's role in tourism activities through social network analysis using the R programming language. The authors searched the topic of "how do you perceive the travel-related WeChat mini program" and then crawled the 200 comments found; 180 comments were analyzed after data cleansing. The results show that travel-related WeChat mini programs play a very important role in Chinese social network tourism activities. This paper found that WeChat played a more active role in various tourism-related interactions with Chinese social networks. Moreover, the results show how affordance theory is applied to the use of WeChat mini programs.

• International Journal of Fluid Machinery and Systems
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• 제4권3호
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• pp.317-323
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• 2011

Mini centrifugal pumps having a diameter smaller than 100mm are employed in many fields; automobile radiator pump, ventricular assist pump, cooling pump for electric devices and so on. Further, the needs for mini centrifugal pumps would become larger with the increase of the application of it for electrical machines. It is desirable that the mini centrifugal pump design be as simple as possible as precise manufacturing is required. But the design method for the mini centrifugal pump is not established because the internal flow condition for these small-sized fluid machines is not clarified and conventional theory is not suitable for small-sized pumps. Therefore, we started research on the mini centrifugal pump for the purpose of development of high performance mini centrifugal pumps with simple structure. Three types of rotors with different outlet angles are prepared for an experiment. The performance tests are conducted with these rotors in order to investigate the effect of the outlet angle on performance and internal flow condition of mini centrifugal pumps. In addition to that, the blade thickness is changed because blockage effect in the mini centrifugal pump becomes relatively larger than that of conventional pumps. On the other hand, a three dimensional steady numerical flow analysis is conducted with the commercial code (ANSYS-Fluent) to investigate the internal flow condition. It is clarified from the experimental results that head of the mini centrifugal pump increases according to the increase of the blade outlet angle and the decrease of the blade thickness. In the present paper, the performance of the mini centrifugal pump is shown and the internal flow condition is clarified with the results of the experiment and the numerical flow analysis. Furthermore, the effects of the blade outlet angle and the blade thickness on the performance are investigated and the internal flow of each type of rotor is clarified by the numerical analysis results.

• 분석과학
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• 제29권2호
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• pp.79-84
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• 2016

최근 손안에 들어올 정도로 크기가 작아 범죄현장 등에서 사용이 가능하며, 다른 일반적인 장비들에 비해 가격이 1/10이하로 저렴하여 누구나 사용할 수 있는 MiniPCR^TM mini8 Thermal Cycler (Amplyus, Cambridge, MA, USA)가 개발되었다. 본 연구에서는 DNA감식에 일반적으로 사용되고 네 가지 종류의 상염색체 STR 다중증폭 키트들과 한 종류의 Y 염색체 STR 증폭키트, 그리고 미토콘드리아 DNA HV1/HV2의 염기서열 분석법을 사용하여 MiniPCR^TM mini8 Thermal Cycler의 성능을 Applied Biosystems사의 GeneAmp^® PCR system 9700와 비교하였다. STR 다중증폭키트 키트들의 민감도와 증폭 불균형 정도를 비교한 결과 두 PCR 장비에서 큰 차이가 없었으며, 미토콘드리아 DNA HV1/HV2의 염기서열 분석 결과도 동등하였다. MiniPCR^TM mini8 Thermal Cycler는 DNA 감식 실험실은 물론이고, 가격이 저렴해 학교와 개인이 간편하게 사용할 수 있으며, 휴대가 간편해 차량이나 야외에서 활용 될 수 있을 것으로 기대된다.

• KIEAE Journal
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• 제6권4호
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• pp.11-16
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• 2006

This work has carried out some preliminary studies for the utilization of a solar mini-dish system capable of concentrating solar rays to higher densities. A typical mini-dish system considered employs an array of solar mini-dishes where major components are light and compact. It consists of small mini-dishes, optical fiber bundles and diffusers at the end. Each mini-dish (typically has a 20 to 30 cm in diameter) is designed with a simple parabolic profile, concentrating sunlight (after the glass glazing cover to avoid dust deposition on the reflector and facilitate cleaning) onto a centrally-located small mirror which is placed on the bottom side of the transparent glass cover. The focused sunlight is reflected by the mirror surface onto a focal point where the receiving aperture of a homogenizer is located. Optical fibers are used to carry high-density solar rays to the other end where diffusers are mounted for indoor illumination. The proposed high density mini-dish system could make an efficient daylighting system as it excludes large moving parts and expandable if necessary. Each component of the system could be made from the off-the-shelf technology and thus, make the generic unit inexpensive to manufacture. Depending on spatial demand or characteristics, the amount of introducing daylight could be controlled. Preliminary tests have been carried out for a trial system to check any functional problems when in operation. Suggestions are also made to improve the design enhancing its performance and applicability.

• 미생물학회지
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• 제26권3호
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• pp.173-180
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• 1988

염색체 유전자를 전달시키기 위한 기초작업으로 RP4 :: Mu cts와 RP4 :: mini-Mu 잡종 플라스미드를 접합에 의하여 E.. coli로 부터 Pseudomonas로 전달시켰다. RP4::Mu cts와 RP4:: mini-Mu의 수용세포는 플라스미드를 가지지 아니하는 Pseudomonas 균주들의 항생세 내성, 탄화수소 자화능 등의 유전적 지표를 조사하여 사용하였다. RP4::mini-Mu는 1$10^{-2}$ - $10^{-4}$의 빈도로 전달되었으며 RP4:: Mu cts는 Pseµdomonas aeruginosa KU557로는 $10^{-2}$의 빈도로, 그 이외의 수용세포로는 10?7의 빈도로 천달되었다. 접합체에 전달된 플라스미드의 존재는 암피실린, 카나마이신, 테트라싸이클린에 대한 내성과 전기영돔에 의해 확인하였으며 특히 RP4::Mu cts는 $43^{\circ}C$에서의 플라크 행성으로도 확인하였다. 접합체들로 부터 생성된 Mu 파아지는 약 $10^{5}$의 P.F.U.를 나타냈으며 전달된 RP4:: Mu cts와 RP4:: mini-Mu는 접합체들에서 비교적 안장한 것으로 밝혀졌다.

• Journal of Korean Dental Science
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• 제6권1호
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• pp.4-12
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• 2013

Purpose: This study sought to verify the usefulness of mini-implant and surgical steel wire in the treatment of mandibular fracture through the objective identifi cation of the change of bone structure and bone density before and after reduction by evaluating radiological change through fractal analysis when mandibular fracture is treated using mini-implant and surgical wire. Materials and Methods: This study looked at 45 patients (males: 38, female: 7) diagnosed with mandibular fracture in the oral and maxillofacial surgery division of Chung-Ang University Dental Hospital and who received open reduction and intra-osseous fi xation. Result: The average fracture dimension values were higher for the group of the patients who had mini-implants and surgical wire treatment. Conclusion: Based on the results of the study on the usefulness of the reduction technique using mini-implant and surgical steel wire in the treatment of mandibular fracture through the fractal analysis method, the reduction technique using mini-implant and surgical steel wire is regarded as an effective method of minimizing the gap between mandibular fracture fragments.

• 대한기계학회논문집A
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• 제28권10호
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• pp.1475-1482
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• 2004

In this paper, the rigid-viscoplastic finite element solutions obtained by MINI-elements based triangular elements and tetrahedral elements are compared with those obtained from numerically well-behaved rectangular and hexahedral elements. The theoretical background of the MINI-elements is introduced in detail and the rigid-viscoplastic finite element formulation is also given. Discussion on the results of the MINI-elements is made with emphasis on the effect of a stabilizer simplifying velocity-bubble coupled terms.

• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1996년도 춘계학술대회논문집
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• pp.276-289
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• 1996

What kind of the mini-component the X-generation wanted\ulcorner It is not easy to find a mini-component which everbody can satisfy with a design and functions. By pre-test of the survey the most wanted things in the mini-component was extracted. By the post-test of the survey the newly design with a price of 500, 000 won. In this paper we try to suggest a mini-component whic X-generation can satisfy with a design and functions. Therefore, this new designed mini-component can give a visual happiness and enjoyment of the sound.

• 대한치과의사협회지
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• 제43권3호통권430호
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• pp.218-224
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• 2005

• 정보관리학회지
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• 제28권3호
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• pp.257-273
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• 2011

본 연구는 부산광역시 지역 새마을문고를 대상으로 법적 위상과 관련한 실태를 분석하였다. 그 결과, 부산광역시 지역의 새마을문고는 154개로 파악되었으며, 이 중 현행 도서관법에서 정하고 있는 사립 공공도서관 요건을 갖춘 문고는 건물면적 0%(0개), 열람석 1%(1개), 도서관자료 40%(59개), 연간증서 31%(45개)로 나타났다. 공공도서관으로서의 작은도서관 요건을 갖춘 문고는 면적 37%(58개), 열람석 66%(101개), 도서관자료 73%(112개)로 나타났다. 주간 5회 이상 개방하는 문고는 50%(77개), 1회 개관 시간이 5시간 이상인 문고는 52%(80개)로 나타났다. 전문직(사서)을 상근으로 배치한 문고는 1%(2개)에 불과하고, 99%(152개)가 비전문직(비사서)을 통해 문고를 운영하고 있었다. 연간 평균 소요예산이 1,000만원 이하인 문고는 81%(127개), 도서관자료 구입예산이 평균 500만원 이하인 문고는 74%(114개)로 파악되었다. 대부분의 문고가 법적 요건에 미달하였으며, 지역 간 편차도 심각한 것으로 파악되었다.