• 한국벤처창업학회:학술대회논문집
• /
• 2017.04a
• /
• pp.21-21
• /
• 2017

귀농귀촌 문화가 유행하고 농업의 미래 가치에 대한 인식이 변화되면서 농산업으로의 새로운 진출을 계획하는 인구가 늘고 있다. 우리의 농업은 자급자족경제로부터 상업경제로 발전되어 왔고, 글로벌 시장 개방 및 생산 기술의 지속적 발전으로 공급이 수요를 초과하며 가격이 점점하락하는 추세를 보이고 있다. 농업 현장의 여러 어려움에도 불구하고 농산업의 긍정적인 여건들도 형성되고 있다. 올바른 먹거리를 추구하는 식품 소비패턴의 변화, 환 생태 치유 자연에 대한 소비자의 관심고조, 스마트 팜과 같은 생산환경의 자동화, 지역 자원을 근거한 공동경영체 운영 등과 같은 현상이 두드러지게 나타나고 있다. 이러한 시점에 농산업분야에 새로이 진출하고자 하는 개인 또는 소규모 사업주체들은 자신의 사업에 대한 정체성을 이해하고, 효율적인 사업운영을 위한 차별화 전략을 확보할 필요가 있다. 본 연구는 개별 또는 소규모 조직의 농업인과 예비농업인들이 자신의 사업에 대한 정체성을 이해하고, 사업운영을 위한 전략 선택을 돕는 비즈니스모델 템플릿 개발을 목표로 하였다. 이를 위해 농업 전문가, 창업 전문가, 비즈니스모델 전문가 풀을 구성하여 농산업 특성을 이해하고 최근 농업 농촌에서 이슈가 되고 있는 농업비즈니스 트랜드를 분석하였다. 근거 자료 및 전문가 토론을 통해 농산업 비즈니스를 '시장가치 추구형', '사회적가치 추구형', '연대하는 시장가치 추구형', '연대하는 사회적가치 추구형'의 4가지 유형으로 구분하고, 각 유형별 사례기업을 조사하여 비즈니스모델을 분석하였다. 비즈니스모델은 비즈니스모델 젠 캔버스를 이용하여 표현하였다. 비즈니스모델 젠은 비즈니스 유형에 따라 일반 창업형, 협동조합형, 임팩트비즈니스형 등 차별화된 캔버스 모델을 제공하고 있으며, 고객중심의 비즈니스 관점을 보다 세밀히 제공하는 툴이다. 본 연구에서는 비즈니스모델 젠을 통해 4가지 유형의 농산업 비즈니스 모델을 분석하였다. 본 연구의 결과는 농산업에 진출하는 사업주체의 사업진행 방향 및 전략선택을 위한 교육 컨설팅 현장에서 널리 이용될 수 있을 것으로 판단된다.

• Journal of the Korean Society for Aeronautical & Space Sciences
• /
• v.31 no.4
• /
• pp.82-91
• /
• 2003

Experiments to investigate the mixing performance of unlike doublet impinging jets are conducted. Reynolds number of simulants used in this study rages from 1.0 to 1.5 Cold flow test is performed to investigate the hydrodynamic effect and spray of the impinging jets are collected locally and calculated by using Rupe's mixing efficiency equation. Momentum exchanges and relative velocity ratio between two jets are taken as the main parameter to represent the effect of enlargement of the orifice diameter. As diameter ratio increases, the corresponding momentum ratio where maximum mixing efficiency occurs and relative velocity at the maximum mixing efficiency ranges 0.6 to 0.7, respectively. Penetration depth can be taken as a prominent parameter to estimate the mixing efficiency.

• Journal of the Korean Society of Physical Medicine
• /
• v.5 no.4
• /
• pp.577-585
• /
• 2010

Purpose : This study was to evaluate gait velocity and stance time on 5 conditions in elderly women and elderly women with LBP. The subjects were 70's generation. Methods : The subjects are 20 divided into 2 groups. They measured gait velocity, stance-time. The 5 conditions were normal gait, 10cm obstacle gait, 25cm obstacle gait, dual 10cm obstacle gait, dual 25cm obstacle gait. The experimental period was between 2008/12 and 2009/2. Statistical analysis was used Repeated measurement for difference between conditions, independent t-test for difference in two groups. Subjects were countdown from 50 during dual task gait. Results : The results were as follow: there were significantly difference 10cm obstacle velocity, dual 10cm obstacle velocity in two group. The others were not significantly differences. Velocity and stance-time were significantly difference in control group. In dual 25cm obstacle gait, velocity was difference of normal gait. Stance-time was difference in 25cm obstacle gait, and dual 25cm obstacle gait. In Experimental group, velocity and stance-time were not significantly difference. But measured value of velocity was gradually decreased and stance time was increased. Conclusion : These results indicate that elderly people with LBP women are reduced gait ability in dual task, and obstacle condition. So they need to prevent falling in dual task, and obstacle gait and to train obstacle/dual tak gait.

• The Journal of Korean Physical Therapy
• /
• v.18 no.3
• /
• pp.79-87
• /
• 2006

Purpose: The present study purposed to examine induced characteristic or erythema and safety by medium wave ultra violet(UVB) lamp. Methods: We compared sunshine and UVB lamp using spectroradiometer and UV radiometer. For measuring sunshine irradiation, we used spectoradiometer and detected from 8 to 18 o'clock every each hour on the beach, playground and rooftop of a 5 story building. The subjects for erythema examination were 5 healthy subjects who have no pathologic history of photosensitivity reaction, psoriasis and vitiligo. They were exposed to UVB radiation at the abdominal area for 2 hours and after irradiation, we observed the change of skin color every 12 hours over a period of 1 week. Results: Between sunshine and UVB lamp, sunshine had higher data on the chromaticity coordinates, dominant and peak wavelength, bandwidth and purity than the UVB lamp but on the color temperature, brightness the UVB lamp had higher data than the sunshine. In comparison of sunshine and UVB lamp, UVB lamp irradiated constantly such as $3.9-4.4{\mu}W/cm^2$ at a distance of 100cm between bed and lamp which was same as early morning irradiation on the sunshine. The erythema didn't appear to any subject. Conclusion: This results suggest that the UVB lamp has lower irradiance as much as early sunshine. Therefore the UVB lamp had no influence of inducing erythema at a distance of 100cm between bed and lamp.

• Journal of the Korean Society of Physical Medicine
• /
• v.13 no.3
• /
• pp.67-73
• /
• 2018

PURPOSE: This study was conducted to investigate the effects of pain, balance, and left / right step time difference between elastic taping and non-elastic taping in patients with acute ankle sprain. METHODS: The subjects were patients with acute ankle sprains who had been injured within 1 day. A total of 30 subjects were divided into three groups (CG: control group, EG1: experimental group 1, EG2: experimental group 2) of 10 people. The intervention period was 3 days. In the CG, only physical therapy (cryotherapy+pulsed ultrasound) was performed, while physical therapy and elastic taping were applied in EG 1 and physical therapy and non-elastic taping were applied in EG 2. RESULTS: Changes in pain, balance and left / right step time difference following intervention decreased significantly in all three groups. After intervention, the balance between the groups differed significantly between the CG and the EGs. In addition, the left / right step time difference differed significantly between the CG and EGs, as well as between the EG 1 and the EG 2. CONCLUSION: Physiotherapy is helpful for treatment of pain associated with acute ankle sprain. Taping is considered to be a way to provide more balance and gait ability.

• Journal of Biomedical Engineering Research
• /
• v.28 no.1
• /
• pp.162-168
• /
• 2007

For the past decade, the full-field digital mammography has been widely used for early diagnosis of breast cancer, and computer aided diagnosis has been developed to assist physicians as a second opinion. In this study, we try to predict the breast cancer using both mediolateral oblique(MLO) view and craniocaudal(CC) view together. A skilled radiologist selected 35 pairs of ROIs from both MLO view and CC view of digital mammogram. We extracted textural features using Spatial Grey Level Dependence matrix from each mammogram and evaluated the generalization performance of the classifier using Support Vector Machine. We compared the multi-view based classifier to single-view based classifier that is built from each mammogram view. The results represent that the multi-view based computer aided diagnosis in digital mammogram could improve the diagnostic performance and have good possibility for clinical use to assist physicians as a second opinion.

• Journal of the Korean Society for Aeronautical & Space Sciences
• /
• v.41 no.2
• /
• pp.142-149
• /
• 2013

The thrust vector control technique is essential for high maneuverability of unmanned aerial vehicles. In the present study, a multi-component balance was developed to quantitatively evaluate the thrust-vectoring performance of a supersonic rectangular nozzle based on the Coanda coflowing effect. Precise calibration and detailed data analysis were performed during the development. It was found that the cross-talk errors between load cells in the balance were less than 5%, and that the unwanted errors due to high-pressure supply tubes were almost negligible, which contributed to the high accuracy of the present balance design. Some preliminary test results of the thrust-vectoring performance of the present nozzle design were also obtained and analyzed.

• Journal of the Korean Society of Propulsion Engineers
• /
• v.1 no.2
• /
• pp.74-83
• /
• 1997

The definition of burning admittance and conventional n-$\tau$ stability rating technique are combined to investigate the high frequency combustion instabilities inside the cylindrical combustion chamber. Perturbed flow variables are written as the sum of fluctuating and time-averaged mean quantities on the assumption that the terms of the order higher than unity are sufficiently small, hence linearized governing equations could be formulated. Chamber admittances up and downstream of the flame front calculated with appropriate boundary conditions result in the burning admittance and corresponding n-$\tau$ neutral stability curve. Configurational and operational design factors are tested to detect the unstable wave-induced LOX-RP1 combustion instabilities. Operational design factors, e.g. pressure or O/F ratio, appear less influential to drive high frequency instability while the location of the flame front and configurational factors enhance or deteriorate the stabilities strongly. Conclusively, LOX-RP1 combustion inside the cylindrical combustion chamber is apt to be unstable against long residence time and shortened chamber length.

• Journal of the Institute of Electronics and Information Engineers
• /
• v.49 no.10
• /
• pp.169-177
• /
• 2012

A non-decimation second-order spatial moving average (SMA) discrete-time (DT) filter is proposed with reconfigurable null frequencies. The filter coefficients are changeable, and it can be controlled by switching sampling capacitors. So, interferers can be rejected effectively by flexible nulls. Since it operates without decimation, it does not change the sample rate and aliasing problem can be avoided. The filter is designed with variable weight of coefficients as $1:{\alpha}:1$ where ${\alpha}$ varies from 1 to 2. This corresponds to the change of null frequencies within the range of fs/3~fs/2 and fs/2~2fs/3. The proposed filter is implemented in the TSMC 0.18-${\mu}m$ CMOS process. Simulation shows that null frequencies are changeable in the range of 0.38~0.49fs and 0.51~0.62fs.

• The Journal of Korean Physical Therapy
• /
• v.21 no.4
• /
• pp.57-63
• /
• 2009

Purpose: To better understand falls in elderly women, we measured differences in muscle activities of 4 lower extremity muscles (tibialis anterior, soleus, rectus femoris, biceps femoris) based on angle plantar-flexion in elderly women. Methods: Subjects were 15 healthy elderly women. No subjects had musculoskeletal or nervous disorders. EMGs were used to check muscle activity of lower extremity muscles. For statistic analysis, data were expressed as a percentage of maximal voluntary isometric contraction (%MVIC). We measured %MVIC for 5 sec under 4 conditions and did not use data for the first and last second. Muscle activities of the muscles of the lower extremities were measured based on the degree of plantar-flexion of the ankle joint. The 4 conditions corresponded to different degrees of: 0, 10, 20 and 30 degrees. This was done using a 50 cm board for measuring the degrees. Results: The tibialis anterior, soleus, and bicpes femoris showed increasing muscle activity associated with increasing degree of plantar-flexion of the ankle joint. All muscles showed a significant increase in muscle activities in association with increasing degrees. Rectus femoris showed a significant increase in muscle activity for 0 degrees and for the other degrees, but there were no further changes when plantar flexion of the ankle joint was over 10 degrees. Conclusion: Activities of the muscles of the lower extremities except rectus femoris were higher with increasing degree of plantar flexion. High muscle activity may result in muscle fatigue. Thus, increasing degree of plantar flexion may be risk factors of falls in elderly women.