• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.05a
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• pp.112-115
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• 2013

Recently, a great attention has been paid to a car black box device in the automobile markets besides it provides an accident re-construction based on the data which contains audio, video, and some meaningful driving informations. Also, it is expected that the device will get to promote around public transit and the market will greatly grow within a few years. Thus, this research conducted of preference the influencing factors in decisions purchase of auto black box. Factors influencing in decisions purchase of black box was divided safety, functionality, differentiation, economics. Questionnaire survey was conducted to those who worked in black box company. This study suggests practical and theoretical implications of factors influencing in purchase decisions based on the results.

• Journal of Chest Surgery
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• v.11 no.4
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• pp.501-515
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• 1978

The purpose of this communication is to review the 390 cases of chest trauma, treated at Department of Thoracic and Cardiovascular Surgery, School of Medicine Kyungpook National University from 1960 to 1977. Patients were grouped into two: group `60s [1960-1969] of 103 cases and group `70s [1970-1977] of 257 cases. As the number of cases of each group showed, chest trauma cases increased three times in `70s . The main causes of trauma were auto accident, falling down, industrial injury and stab wound in that order for both groups. Eighty per cent of cases of `60s were between 20 and 59 years and 73.8% of same age range for `70s. Rib fracture of fourth to eighth rib was the most common lesion in both `60s and `70s group. The incidence of hemothorax or hemopnemothorax significantly increased among `70s group than `60s. Clinical manifestations of chest pain and dyspnea remained most frequent symptoms for both groups. The pertinent principles of treatment for the chest trauma were conservative therapy, closed thoracotomy and open thoracotomy. Closed thoracotomy was performed more freely during the period of 1970-1977, with encouraging clinical results. Very few cases of complications other than pneumothorax or hemopneumothorax occurred. Those are fibrothorax, asphyxia, atelectasis and mediastinitis. The overall mortality was 3.9% for the `60s and 2.1% for the `70s group. The possible causes of death of 14 cases of chest trauma whom died on arrival during 1970-1977 were analyzed.

• Journal of Chest Surgery
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• v.11 no.4
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• pp.488-500
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• 1978

The purpose of this communication is to review the 390 cases of chest trauma, treated at Department of Thoracic and Cardiovascular Surgery, School of Medicine Kyungpook National University from 1960 to 1977. Patients were grouped into two: group `60s [1960-1969] of 103 cases and group `70s [1970-1977] of 257 cases. As the number of cases of each group showed, chest trauma cases increased three times in `70s . The main causes of trauma were auto accident, falling down, industrial injury and stab wound in that order for both groups. Eighty per cent of cases of `60s were between 20 and 59 years and 73.8% of same age range for `70s. Rib fracture of fourth to eighth rib was the most common lesion in both `60s and `70s group. The incidence of hemothorax or hemopnemothorax significantly increased among `70s group than `60s. Clinical manifestations of chest pain and dyspnea remained most frequent symptoms for both groups. The pertinent principles of treatment for the chest trauma were conservative therapy, closed thoracotomy and open thoracotomy. Closed thoracotomy was performed more freely during the period of 1970-1977, with encouraging clinical results. Very few cases of complications other than pneumothorax or hemopneumothorax occurred. Those are fibrothorax, asphyxia, atelectasis and mediastinitis. The overall mortality was 3.9% for the `60s and 2.1% for the `70s group. The possible causes of death of 14 cases of chest trauma whom died on arrival during 1970-1977 were analyzed.

• International Journal of Highway Engineering
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• v.15 no.6
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• pp.135-141
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• 2013

PURPOSES : The lack of details of design guideline for zig-zag shaped section approaching central bus stop leads an traffic accident proneness. So, this study analysed the geometric elements of central bus stop area in terms of vehicle dynamics and suggested design alternatives. METHODS : The study analysed a dynamic behaviour of bus moving in and out of zig-zag shaped section using Auto-Turn under scenarios. Based upon dynamic analysis, the study found out the width of overtaking lane is the most influential factor for a safe moving at zig-zag alignment. RESULTS : The width of overtaking lane at design speed of 40, 50, and 60 km/h respectively was suggested given taper ratio of 1 to 10 required for Bus Rapid Transit (BRT), and the lane width is not wider than 4.0m which possibly makes two vehicles using the same lane. Also, the width of overtaking lane which mitigates the taper ratio was suggested with the same restriction about the maximum lane width. CONCLUSIONS : The results of the study can be used to prepare a design guideline on zig-zag shaped alignment of central bus exclusive lanes. The more stable moving is expected by applying the design alternatives suggested, therefore the lower rate of traffic crashes at the vicinity of central bus stops.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.19 no.2
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• pp.89-103
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• 2020

As we face an aging society, the demand for personal mobility for disabled and aged people is increasing. In fact, as of 2017, the number of electric wheelchair in the country continues to increase to 90,000. However, people with disabilities and seniors are more likely to have accidents while driving, because their judgment and coordination are inferior to normal people. One of the causes of the accident is the interference of personal vehicle steering control due to unbalanced road surface conditions. In this paper, we introduce a encoder type semantic segmentation algorithm that can recognize road conditions at high speed to prevent such accidents. To this end, more than 1,500 training data and 150 test data including road surface damage were newly secured. With the data, we proposed a deep neural network composed of encoder stages, unlike the Auto-encoding type consisting of encoder and decoder stages. Compared to the conventional method, this deep neural network has a 4.45% increase in mean accuracy, a 59.2% decrease in parameters, and an 11.9% increase in computation speed. It is expected that safe personal transportation will be come soon by utilizing such high speed algorithm.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.7 no.1
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• pp.129-135
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• 2003

Optical fiber has many advantages, such as high reliability, long lifetime, immunity to the electromagnetic interference, high speed response and low cost. In this study, we proposed and developed an optical fiber impact and pressure sensor for prevention of accident which occurs in the automatic system or auto door. The principle of the sensor is to detect different optical intensity caused by variation of a speckle pattern due to the external perturbation. Speckle pattern appears at the end of a multimode fiber in which coherent beam propagates. The fabricated sensor in this study was tested. As a result of experiments, amplitude of the output signal isn't linear, but it has sufficient sensitivity for a sensor. Moreover, we can control sensitivity of the sensor by an amplifier at receiver. It has several advantages which are ability of detection at all point on the multimode fiber, large sensitive area, and many application areas for a sensing impact and pressure.

• Korea Journal of Hospital Management
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• v.17 no.2
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• pp.21-33
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• 2012

Purpose : This study aims to suggest application of patients DB to hospital marketing by performing market segmentation and selecting target market. Consequently help to establish suited strategy of marketing. Method : 14,072 patients hospitalized in a University Medical Center were recruited into this study. In order to classify the customer groups, cluster analysis was used with RFM(Recency, Frequency, Monetary) model, and 1-way ANOVA verified the differences among groups. And then, sociodemographical status, healthcare utilization and diagnosis(ICD-10) of each group were compared to draw a marketing strategy. Results : Four groups were classified through clustering analysis, and'high use and high profit' and'low use and high profit' groups were selected as a target market. The features of target market were as follows, the female proportion was high; used a private room; hospitalized through the emergency room; had operation; length of stay was long; had many comorbidity and cooperative treatment. There was difference in each feature of target market: as for the'high use and high profit' group, many patients were diagnosed with 'certain infectious and parasitic diseases'; and as for the'low use and high profit'group, the proportion of patients who purchased'industrial accident compensation insurance'and'auto insurance'was relatively high; many patients were diagnosed with'Injury, poisoning and certain other consequences of external causes'. Conclusion : It is needed to establish'positioning' strategy by monitoring and communicating with'high use and high profit' group. And for the case of'low use and high profit' group, it is necessary to make a follow-up management and lead them to have a medical check-up.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.9
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• pp.2153-2159
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• 2013

In order to drive a vehicle safely, driver needs to check status of the car. Many moderns are having trouble to spare time to visit auto mechanic and have car mechanics to check their car other than their office hours. If the car status cannot be inspected regularly, it is likely to cause a big accident threatening the surroundings as well as driver's life. Inspection tool and system help driver to check their own vehicle status personally are required for preventing it. In this paper, it designed and realized system that records driving information based on changing data of vehicle (location and automotive internal data) and allows driver can check the vehicle status easily and further, driver can share the driving information with repair shop via the Internet to receive detailed inspection service for car status.

• The Journal of the Korea Contents Association
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• v.11 no.4
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• pp.263-272
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• 2011

The purpose of this study is suggesting proper management methods for the national health expenditures by considering advanced countries and analysing the problems of national health expenditures management in korea. The majors results of the research are as follows. First, most advanced countries is integrating the management of national health expenditures about health insurance, workmen's accident compensation insurance and auto insurance etc, and medical prices and benefit standards are same regardless of insurance type. Second, national health expenditures has been managing separately by national health systems in korea, and there are many problems like the differences medical expenditure review and payment, medical prices and benefit standards etc. Although same symptoms and disease, there is great difference in health service utilization. Hereafter, management system of national health expenditures must be integrated, and must change same medical prices and benefit standards.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.05a
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• pp.262-264
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• 2016

In order to check the status of tire wear, a driver or auto mechanic generally checks tires with the naked eyes or with a coin. Those are easy for anyone but make it difficult to obtain precise information. But the result is a measure of mechanic wear out due to subjective judgment. Since we can not give correctly measure the stability of the tire. This may lead to an accident of the operator. Therefore, there is a need for a system checking tires precisely, accurately and easily, while making up for the aforementioned defect. This thesis has implemented a system with the aforementioned function. This system tire surface scanner data unit to determine the tread wear on the car and a storage unit for the data save, And a Web service unit allows the user to easily check the information.