• Proceedings of the Korean Society of Computer Information Conference
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• 2022.01a
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• pp.177-178
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• 2022

"윤창호법" 시행 이후 음주운전이 크게 줄지 않았을 뿐 아니라 최근에는 다시 증가하는 추세를 보인다. 이에 본 논문에서는 우리나라와 일본의 음주운전 법적 기준 및 법정 형량, 등을 비교·분석하여 시사점을 제시하였다. 현재 음주운전 사상사고가 지속해서 발생하고 있고, 아직도 음주운전의 처벌이 강하지 않다는 인식이 크다. 이에 해외 사례 등을 참고하여 우리나라 현실에 부합하는 새로운 대안을 마련하고자 하며, 나아가 미래 자동차 디지털화 시대에 맞춰 변화될 법 제도의 올바른 방향에 대하여 고찰하고자 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.214-215
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• 2013

The main criteria for objective measure of the level of transportation service is travel time and delay time. In this paper, the level of service is measured by using moving vehicles method. Through this, we get the hourly traffic volume, the average travel time, space average speed, etc. In addition, we get the density of traffic.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.01a
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• pp.105-106
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• 2014

본 논문에서는 통행 시간의 측정 방법 중 하나인 CCTV를 활용한 주행 차량 조사법을 이용하여 교통량을 측정한다. 교통망의 서비스 수준을 측정하는 주요 기준인 통행 시간과 지체 시간에 대하여 알아본다. 신호등 간격이 넓어서 연속적인 교통류 특성을 갖는 곳에서 측정을 하도록 한다. 반대편의 교통류가 충분히 식별 가능한 구간이어야 하고, 구간의 끝부분에서는 유턴이 가능해야 한다. 이 방법은 측정차량의 운전수만 있으면 CCTV와 프로그램이 알아서 측정하고, 시간, 거리, 교통량을 기록할 수 있는 장비도 필요 없다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.169-170
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• 2014

Most of the attacks will attempt to exploit the vulnerability of the application website(SW). Cases are also frequently at home and abroad, and to be hacked. In this paper, S/W Development Security sees the main issues dealt with. Security-related laws and regulations to look at the system.

• International Journal of Highway Engineering
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• v.9 no.3
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• pp.101-110
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• 2007

Joint Spacing of Jointed Concrete Pavement has been uniformly designed and constructed as six-meter in Korea. However, engineering backgrounds to show the appropriateness of six-meter Joint Spacing has not been provided. In the on-going reseach of the development of Korea Pavement Reseach Program(KPRP), the optimum Joint Spacing is suggested as 6 to 8 meters according to the regional climatic conditions based on the mechanical-empirical analysis of short-term and long-term pavement distress. This study is a part of the investigation on the adequateness of Joint Spacing design specification suggested in KPRP. Joint Spacing was design and constructed as seven-meter Joint Spacing suggested as design specification in Korea Reseach Program(KPRP) and monitored the Load Transfer Efficiency(LTE), Random crack and compared with those of adjacent $6{\sim}7$ meter Joint Spacing concrete section.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.22 no.6
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• pp.69-74
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• 2022

Even after the drunk driving law was revised through the Yoon Chang-ho Act in 2019, the proportion of habitual offenders among all drunk drivers in 2021 was 4.7%, up 0.5% from 2018. In addition, drunk driving is not easily stopped due to the addiction of alcohol, and there is a high probability of recidivism in accidents as it is often driven again. Therefore, in this paper, to prevent this, when alcohol is measured using its own sensor rather than a manual police measure, the vehicle stops and related data such as the current location and time are automatically saved. Since it is not possible to develop directly on the car, this system was developed by converging various technologies and sensors such as Arduino board, Firebase, and GPS based on the IoT environment in consideration of the simulation environment.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.40 no.7
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• pp.1450-1456
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• 2015

The received signal strengths according to the propagation distance between a transmitting shore station with a 53 m antenna hight and a receiving ship station with about 6m antenna hight from 700 m upto about 20 km are measured at ship's moving velocity of $5{\pm}1m/s$ using a single carrier signal at 150.0625MHz. In this paper, the path loss exponents at the propagation distance from 700 m to 20km are estimated via minimum-mean-square-error method using the measurements of the received signal strength, and the mean of the estimated path loss exponent become 3.79. The estimated propagation path loss exponents is similar to that calculated based on the field-strength values from 2 km to 20 km in Annex 2 of ITU-R P.1546-4, which is measuring results at maritime VHF at 100 MHz carrier frequency. Therefore, the estimated propagation path loss exponent shall be used as the expected path loss exponents for summer in costal area of South Sea of Korea.

• Clean Technology
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• v.26 no.2
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• pp.131-136
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• 2020

Biomass bamboo charcoal is utilized as anode for lithium-ion battery in an effort to find an alternative to conventional resources such as cokes and petroleum pitches. The amorphous phase of the bamboo charcoal is partially converted to graphite through a low temperature graphitization process with iron oxide nanoparticle catalyst impregnated into the bamboo charcoal. An optimum catalysis amount for the graphitization is determined based on the characterization results of TEM, Raman spectroscopy, and XRD. It is found that the graphitization occurs surrounding the surface of the catalysis, and large pores are formed after the removal of the catalysis. The formation of the large pores increases the pore volume and, as a result, reduces the surface area of the graphitized bamboo charcoal. The partial graphitization of the pristine bamboo charcoal improves the discharge capacity and coulombic efficiency compared to the pristine counterpart. However, the discharge capacity of the graphitized charcoal at elevated current density is decreased due to the reduced surface area. These results indicate that the size of the catalysis formed in in-situ graphitization is a critical parameter to determine the battery performance and thus should be tuned as small as one of the pristine charcoal to retain the surface area and eventually improve the discharge capacity at high current density.

• Clinics in Shoulder and Elbow
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• v.15 no.2
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• pp.130-137
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• 2012

Purpose: To evaluate and report the clinical outcome after surgical treatment of intra-articular comminuted fracture of distal humerus in the elderly with osteoporosis. Materials and Methods: From January 2007 to October 2009, 24 patients aged older than 65 years with intra-articular comminuted fracture of distal humerus underwent surgical treatment. 18 patients (Group I) were managed using primary open reduction and internal fixation (OR IF) through the modified posterior approach and 6 patients (Group II) were taken primary total elbow arthroplasty. The average follow up period was 17.2 months. According to the AO classification, there were 8 C2, 16 C3 type fractures. All enrolled patients were evaluated radiographically and clinically. Clinical outcomes were assessed with the Mayo Elbow Performance, Disabilities of Arm and Shoulder and Hand, and Musculoskeletal Functional Assessment functional questionnaires. Results: The bony union was observed in 18 patients in group I at average 14 weeks. There were 2 patients with neurapraxia of whom the ulnar nerve symptom did not improve despite of anterior transposition. And non-union at osteotomy sites was seen in 2 patients. The mean Mayo Elbow Performance score was 87.0. The mean DASH score was 32.4. The average arc of elbow flexion was $121.0^{\circ}$ (range, $95{\sim}145^{\circ}$) with mean flexion-contracture of $12.0^{\circ}$ (range, 0 to 35). 6 patients in Group II showed no complication during follow up periods. The mean Mayo Elbow Performance score was 89.1. The mean DASH score was 44.3. The average arc of elbow flexion was $125.1^{\circ}$ (range, $100{\sim}145^{\circ}$) with mean flexion-contracture of $12.6^{\circ}$ (range, 0 to 30). Conclusions: With careful patient selection, Total elbow arthroplasty as well as OR IF could achieve good outcomes in elderly of comminuted intra-articular distal humerus fracture with osteoporosis.

• Journal of Veterinary Clinics
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• v.32 no.6
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• pp.486-490
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• 2015

Two-demensional echocardiography is routinely used for evaluation of cardiac function. Visualization of the endocardial border is essential for the assessment of global and regional left ventricular with cardiac disease. SonoVue$^{TM}$ is a microbubble contrast agent that consists of sulfur hexafluoride-filled microbubbles in a phospholipid shell. There were many studies about contrast echocardiographic examination using SonoVue$^{TM}$ contrast agent, and various doses of SonoVue$^{TM}$ were used. To our knowledge, in published veterinary medicine, there was not reported for diagnostic efficient dose of SonoVue$^{TM}$ to evaluate contrast enhanced left ventricular endocardial border delineation (LVEBD). The purpose of this study is to compare the visualization time of LVEBD and find efficient dose of SonoVue$^{TM}$ for using various doses in dogs. Ten healthy Beagles were recruited to the study. Three different doses (0.03 ml/kg, 0.05 ml/kg and 0.1 ml/kg) of SonoVue$^{TM}$ were injected. Endocardial segments were assigned based on previously established methodology, where by the four-chamber views of the LV were divided into 6 segments. In this study, Contrast enhancement of the LVEBD after each injection was evaluated visually at the time point of overall contrast enhancement (Segmental scoring 5+) in the LV by three investigators in a blind manner. Statistical analysis was performed with SPSS version 14.0. All data were analyzed using one-way ANOVA, the multiple comparison Scheffe test. When data for the three offsite readers were combined, mean durations of useful contrast were $3.54({\pm}2.14)$, $6.15({\pm}2.61)$, and $24.39({\pm}11.10)$ seconds for the 0.03 ml/kg, 0.05 ml/kg, and 0.1 ml/kg SonoVue$^{TM}$ doses, respectively. After injection of contrast agent, there were no significant change in side effects such as urticaria, angioedema, hypersensitivity reactions, and digestive system disorders. This study suggests that efficient dose of SonoVue$^{TM}$ contrast agent for improvement of the left ventricle visualization is 0.1 ml/kg. The duration of useful enhancement of LVEBD and the reproducibility were also the highest at the 0.1 ml/kg dosage.