• 한국소음진동공학회논문집
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• 제24권1호
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• pp.54-61
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• 2014

This paper proposes a driver supportive device with haptic cue function which can transmit optimal gear shifting timing to a driver without requiring the driver's visual attention. Its performance is evaluated under vehicle model considering automotive engine, transmission and vehicle body. In order to achieve this goal, a torque feedback device is devised and manufactured by adopting the MR (magnetorheological) fluid and clutch mechanism. The manufactured MR clutch is then integrated with the accelerator pedal to construct the proposed haptic cue device. A virtual vehicle emulating a four-cylinder four-stroke engine, manual transmission system of a passenger vehicle and vehicle body is constructed and communicated with the manufactured haptic cue device. Control performances including torque tracking and fuel efficiency are experimentally evaluated via a simple feed-forward control algorithm.

• Biomolecules & Therapeutics
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• 제8권3호
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• pp.255-261
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• 2000

WooHwangChungSimWon is a traditional prescription for treating with hypertension, arteriosclerosis, coma, and stroke in China, Korea, and Japan. In the new presciption of WooHwangChungSimWon, the covet is substituted for the musk, the major component of WooHwangChungSimwon, because of the prohibition law about the musk. We have made a comparative study of the effects on the ischemic damage between the musk containing and civet containing WooHwangChungSimWon. In order to investigate the effects of WooHwangChungSimWon on the ischemic damage, each samples were administrated for 12 days, ischemia was induced for 10 minutes at 7th day, and immunohistochemistry was performed in the region of hippocampus of mongolian gerbils. According to the result of immunohistochemistry, the survival rates of neuroal cells in the hippocampal CA1 region are 37.8% in the high dose of musk containing WooHwangChungSimWon (HM-WHCSW) administrated group, 27.8% in low dose of civet containing WooHwangChungSimWon (LC-WHCSW), and 35.5% in high dose of civet containing WooHwangChungSimWon (HC-WHCSW) administrated group. These survial rates were significantly different from the survival rate of sham control group (14.4%). The results suggest that all the samples except the low dose of musk containing WooHwangChungSimWon (LM-WHCSW) have protective or preventive effects on cerebral ischemia.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2004년도 추계학술대회논문집
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• pp.498-502
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• 2004

In a link-motion mechanism, numerous links are interconnected and each link executes a constrained motion at a high speed. Due to the complicated constrained motions of the constituent links, dynamic unbalance forces and moments are generated and transmitted to the main frame. Therefore unwanted vibration is produced. This degrades productivity and precise work. Based on constrained multi-body dynamics, the kinematic analysis is carried out to enable design changes to be made. This will provide the fundamental information for significantly reducing dynamic unbalance forces and moments which are transmitted to the main frame. In this work, a link-motion punch press is selected as an example of a link-motion mechanism. To calculate the mass and inertia properties of every link comprising a link-motion punch press, 3-dimensional CAD software is utilized. The main issue in this work is to eliminate the first-order unbalance force and moment in a link-motion punch press. The mass, moment of inertia link length, location of the mass center in each link have a great impact on the degree of dynamic balancing which can be achieved maximally. Achieving good dynamic balancing in a link motion punch press is quite essential fur reliable operation at high speed.

• 인터넷정보학회논문지
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• 제5권6호
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• pp.121-128
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• 2004

본 논문에서는 전자 펜을 사용하여 필기한 문자열의 품질을 평가할 수 있는 시스템을 제안한다. 이 시스템의 구현을 위하여, 본 논문에서는 참조자료를 획득하는 방법, 전역특징과 지역특징을 통하여 필기 문자열의 품질을 평가하는 방법에 관하여 기술한다. 또한, 전역특징을 사용함에 있어서의 선택적 인식 방법과 지역특징을 사용함에 있어서는 획순을 진단하는 방법에 관해서도 설명한다. 제안하는 시스템은 입력어와 참조어가 다른 경우도 필기문자열의 품질을 평가할 수 있는 특성도 있다. 따라서 제안하는 시스템은 글체교정 뿐 아니라 어휘력 및 문장력을 향상할 수 있는 언어훈련을 동시에 수행할 수 있어 그 기대효과가 매우 클 것으로 고려된다.

• 한국추진공학회지
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• 제21권1호
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• pp.104-111
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• 2017

탄두 신관에 사용되는 길이 25.4 mm, 직경 8.0 mm이고 행정길이 25.4 mm 이상에 대해 4.5 kgf의 추력을 제공하는 화약 벨로우즈를 새로이 개발하였다. BP/MTV 조성의 새로운 가스발생기를 개발하였으며, 화약 벨로우즈 작동시 압축되는 스프링의 길이를 측정하는 위력시험장치도 고안하였다. 새로 개발된 화약 벨로우즈가 요구조건을 만족하는지 검증하기 위해 감도시험과 위력시험을 수행하였다. 시험결과 새로 개발한 화약 벨로우즈는 요구조건을 충족하였으며, 탄두용 신관에 적용이 가능하다.

• 한방안이비인후피부과학회지
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• 제12권2호
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• pp.124-145
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• 1999

Anal Therapy is taken valid compound of herb med and has many kinds of treatments. As one of the anal therapy, retention enema is most common and useful way. This study was performed in order to literatural basements of clinical treatments. we had cleared manifest about the origin and literatural basement of anal therapy, methods of management, classification of indication, clinical application and so forth. The results were summerised as follows. 1. It explained relationships between anus and Ojang-yukbu(五臟六腑), Sibie-geongmaek(十二經脈). But in fact the origin of anal therapy is Milgeon-dobub(蜜煎導法) and Jedamjib-dobub(猪膽汁導法) in Sanghan-jabbyungron(傷寒雜病論) of Han Dynasty. 2. The effect of anal therapy can be reached to the destination through theory of the organism which is called Jung-chei theory(整體論) and local medical action. We can find a little in Naegeong(內經), which is basement of Hang-jang therapy. 3. Anal Therapy have Kwanjaogbub(灌腸法), Guhangbub(灸肛法), Dohangbub(塗肛法), Hoonhangbub(熏肛法), Saekhangbub(塞肛法), Youkhangbub(浴肛法), Jwajeombub(坐점法) e.t.c. 4. Anal Therapy is available when person can't taken by mouth. Its benefits are fast effect and low side effect about liver because it is not taken trough liver mostly. 5. Anal Therapy has been used for the treatment of diseases such as stroke, high fever, pneumonia, ulcerative colitis, prostatitis, renal failure, pelvic inflammation. cancer and so on.

• Earthquakes and Structures
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• 제16권2호
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• pp.149-163
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• 2019

By integrating an active tuned mass damper (ATMD) and an inerter, the ATMDI has been proposed to attenuate undesirable oscillations of structures under the ground acceleration. Employing the mode generalized system, the dynamic magnification factors (DMF) of the structure-ATMDI system are formulated. The criterion can then be defined as the minimization of maximum values of the DMF of the controlled structure for optimum searching. By resorting to the defined criterion and the particle swarm optimization (PSO), the effects of varying the crucial parameters on the performance of ATMDI have been scrutinized in order to probe into its superiority. Furthermore, the results of both ATMD and tuned mass dampers inerter (TMDI) are included into consideration for comparing. Results corroborate that the ATMDI outperforms both ATMD and TMDI in terms of the effectiveness and robustness. Especially, the ATMDI may greatly reduce the demand on both the mass ratio and inerter mass ratio, thus being capable of further miniaturizing both the ATMD and TMDI. Likewise the miniaturized ATMDI still keeps nearly the same stroke as the TMDI with a larger mass ratio. Hence, the ATMDI is deemed to be a high performance control device with the miniaturization and suitable for super-tall buildings.

• 한국멀티미디어학회논문지
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• 제22권2호
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• pp.194-202
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• 2019

In the information society represented by the Fourth Industrial Revolution, various types of data and information that are difficult to see are produced, processed, and processed and circulated to enhance the value of existing goods. The IoT(Internet of Things) paradigm will change the appearance of individual life, industry, disaster, safety and public service fields. In order to implement the IoT paradigm, several elements of technology are required. It is necessary that these various elements are efficiently connected to constitute one system as a whole. It is also necessary to collect, provide, transmit, store and analyze IoT data for implementation of IoT platform. We designed and implemented a big data processing IoT platform for IoT service implementation. Proposed platform system is consist of IoT sensing/control device, IoT message protocol, unstructured data server and big data analysis components. For platform testing, fixed IoT devices were implemented as solar power generation modules and mobile IoT devices as modules for table tennis stroke data measurement. The transmission part uses the HTTP and the CoAP, which are based on the Internet. The data server is composed of Hadoop and the big data is analyzed using R. Through the emprical test using fixed and mobile IoT devices we confirmed that proposed IoT platform system normally process and operate big data.

• 턱관절균형의학회지
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• 제8권1호
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• pp.11-15
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• 2018

Recently, clinical efficacies of the intraoral balancing appliance therapy have been reported by several researchers, and it has been found that there are various kinds of diseases that can be effectively applied. However, studies on cerebrovascular disease, one of the main diseases with a high mortality rate, are still poorly reported, and studies of temporomandibular joint disorder (TMD)-induced changes in brain function suggest that cerebrovascular disease is more appropriate as an adaptive disorder of the temporomandibular joint (TMJ) balancing device. In the developed countries, the importance of research on the structure and function of the brain has been recognized and spurred on the related research. In Korea, the research on brain function and cognitive disorders should have promoted more massively. In order to regain its former reputation in the Korean medicine in the field of cerebrovascular disease, it should be spurred on basic research and clinical case studies. In addition, extensive and in-depth studies including animal studies are needed to establish the basis of underlying mechanisms of the TMJ balancing therapies.

• 생약학회지
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• 제53권2호
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• pp.64-69
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• 2022

When blood vessels are damaged, a rapid hemostatic response should occur in order to lower blood loss and keep normal circulation, and platelet activation and aggregation are essential. Nevertheless, abnormal or excessive platelet aggregation can be a reason of cardiovascular diseases including thrombosis, atherosclerosis, and stroke. Therefore, the screening for a substance which can regulate platelet activation and suppress aggregation reaction is very important for treatment and prevention of cardiovascular diseases. Artemether is a methyl ether derivative of artemisinin, which is isolated from the antimalarial plant Artemisia annua, but research on platelet aggregation or its mechanisms is still insufficient. This study identified the effects of artemether on U46619-induced human platelet aggregation and their granule secretion (ATP and serotonin release). In addition, the effects of artemether on the phosphorylation of PI3K/Akt or MAPK, which are related to signal transduction in platelet aggregation, were studied. As the results, artemether significantly lowered PI3K/Akt and MAPK phosphorylation, which inhibited platelet aggregation through granule secretion (ATP and serotonin release) dose-dependently. Therefore, we suggest that artemether is an antiplatelet substance that regulates PI3K/Akt and MAPK pathway and is of value as a therapeutic and preventive agent for platelet-derived cardiovascular diseases.