• Proceedings of the KAIS Fall Conference
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• 2011.05a
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• pp.173-175
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• 2011

현대의 고도화된 산업현장에서 로봇의 사용은 보편화되고 있는 실정이다. 사람이 하기 어려운 작업을 대신함으로 인해 작업의 효율성과 생산의 극대화를 이루고 있다. 이런 가운데 로봇의 쓰임이 다양화되고 있는 추세에 있다. 그 중 한 분야로 무인 탐사 로봇을 만들어 보려 한다. 무인 탐사로봇의 주요기능으로는 악조건에서도 움직일 수 있는 이동체와 원거리에서도 사람이 실시간으로 볼 수 있는 영상전송기능 등을 필요로 한다. 이런 기능을 담당하는 부품들을 제어하기 위해 프로세서가 사용된다.

• Proceedings of the KAIS Fall Conference
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• 2010.05b
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• pp.1181-1184
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• 2010

직장-가정에 대한 연구는 구성원의 직장생활과 가정생활과의 조화를 통해 업무성과 및 생산성, 생활 만족, 직무스트레스 등의 제고를 위한 방안도출에 매우 중요하다. 하지만 직장-가정 갈등과 관련하여 일반조직에 대한 선행연구는 많이 이루어졌지만, 일정한 질서의 조직편제를 갖춘 경찰조직과 같은 준 군대조직, 위험성, 정치성이 있는 조직에 대한 연구는 전무한 실정이다. 따라서 본 연구는 경찰청이라는 특수한 조직의 직원에 대한 직장-가정갈등과의 원인의 결정요인을 고찰하고자 한다.

• Journal of ILASS-Korea
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• v.9 no.2
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• pp.41-49
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• 2004

Liquid breakup under the variation of AC frequency has been studied experimentally in the electrohydrodynamic atomization. The effect of parameters such as charging voltage, flow rate, nozzle tip inner diameter and power frequency have been considered. This work was performed to investigate the experimental analysis for the effect of AC frequency on breakup process, the mapping of occurrence of disintegration region, and the relationship between the applied power and the droplet radius. The experimental results show that the increase of applied voltage in a certain frequency band leads to a reduction in the droplet size within the limits from 50Hz to 400Hz. The transition phenomena from dripping mode to spindle mode were observed under the band of sudden fall of droplet radius changing ratio, and the synchronous region were produced within the range of applied voltage from 5kV to 6kV.

• Journal of Institute of Control, Robotics and Systems
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• v.22 no.11
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• pp.937-943
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• 2016

Vertical velocity is critical in many areas, such as the control of unmanned aerial vehicles, fall detection, and virtual reality. Conventionally, the integration of GPS (Global Positioning System) with an IMU (Inertial Measurement Unit) was popular for the estimation of vertical components. However, GPS cannot work well indoors and, more importantly, has low accuracy in the vertical direction. In order to overcome these issues, IMU-barometer integration has been suggested instead of IMU-GPS integration. This paper proposes a new complementary filter for the estimation of vertical velocity based on IMU-barometer integration. The proposed complementary filter is designed to minimize drift error in the estimated velocity by adding PID control in addition to a zero velocity update technique.

• Journal of Medicine and Life Science
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• v.16 no.3
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• pp.60-63
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• 2019

The rate of suicide is the 5th leading cause of death in Korea. Moreover, suicide is the 1st cause of death in from 2nd to 4th decade. In order to treat suicide attempters who have visited the emergency room and to prevent retries, it is necessary to understand the nature of the suicide and to take the right approach. Suicide is more than doubled in women, and retry rates are high among patients with a history of suicide. Suicidal means are throat, fall, gas poisoning, poisoning and drowning. All suicide attempters should suspect and treat cervical spine injury and airway management, and rapid hyperbaric oxygen therapy is recommended for carbon monoxide addicts. Interviewing a suicide attempter requires a sympathetic attitude and examines the underlying depression or adaptation disorders. Interdisciplinary care with mental health departments is necessary, and interventions in emergency roombased suicide attempt management work can be helpful to connect with the community.

• Journal of the Korean Society of Safety
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• v.14 no.1
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• pp.150-157
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• 1999

Developed in the study is the analysis of human factors involved in accidents of Korean Construction Projects. The 556 cases are sampled from a survey material 'Serious Accident Cases in the Construction Projects' edited by Korea Industrial Safety Corporation in 1995 through 1997. The analysis of these cases shows that existing classification system is not good for practical applications in real spots since they are difficult for engineers to understand. In this paper, human factors are classified into three groups by extracting the analysis and arrangement of the cases. Futhermore, We'll propose here a new type of accident which is subdivided. If engineers use this type of accident, they will be probably able to analyze efficiently human factors which are involved in accidents and relatied with how it happen. In the case of fall and upset accidents, personal factors seem to be critical when workers are horizontally moving in an unstable manner, and vertically moving without boarding facilities. Futhermore work environmental factors are important when workers release some materials and are performing building and dismantling tasks.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2009.11a
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• pp.247-252
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• 2009

With the increasing use of tower cranes higher than free standing height, the importance of lateral support is also growing. Since the fall of 43 tower cranes hit by the last typhoon 'Mami' in 2003, regulations and concerns about safety of construction equipment have increased and construction laws regarding lateral support have been strengthened. In Korea, where there are many large-scale apartment housing construction works with the development of new towns, Rope Guying is a more economical construction method than Wall Brace which fixes building structure like building wall and slab. The safety of this Rope Guying is not verified and many construction works are still carried out based on the experience of site managers. There has been no case of construction work where frame and measurements are applied. The objective of this study is to examine the safety of Rope Guying method and ensure the effective implementation of equipment and prevention of disasters.

• Proceedings of the KSR Conference
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• 2005.11a
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• pp.915-920
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• 2005

Passenger safety is a primary concern of railway system but, it has been urgent issue that dozens of people are killed every year when they fall off from train platforms. Recently, advancements in IT have enabled applying vision sensors to railway environments, such as CCTV and various camera sensors. The objective of this work is to propose technical and system requirements for establishing intelligent monitoring system using camera equipments in urban transit system. We suppose the system is to determine automatically and in real-time whether anyone or anything is in monitoring area. To achieve the goal, we analyze recent image processing technologies for detection and recognition, and suggest possible direction of system development for applying urban transit system. According to the results, we expect the proposed system requirements will playa key role for establishing highly intelligent monitoring system in railway.

• IEIE Transactions on Smart Processing and Computing
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• v.4 no.4
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• pp.251-257
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• 2015

This work presents modelling and simulation of a readout integrated circuit (ROIC) design considering pair-wise serial configuration along with thermal modeling of an uncooled microbolometer array. A fully differential approach is used at the input stage in order to reduce fixed pattern noise due to the process variation and self-heating-related issues. Each pair of microbolometers is pulse-biased such that they both fall under the same self-heating point along the self-heating trend line. A ${\pm}10%$ process variation is considered. The proposed design is simulated with a reference input image consisting of an array of $127{\times}92$ pixels. This configuration uses only one unity gain differential amplifier along with a single 14-bit analog-to-digital converter in order to minimize the dynamic range requirement of the ROIC.

• Safety and Health at Work
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• v.1 no.2
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• pp.107-111
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• 2010

This paper provided a brief summary of the current strategic goals, activities, and impacts of the NIOSH (National Institute for Occupational Safety and Health) occupational injury research program. Three primary drivers (injury database, stakeholder input, and staff capacity) were used to define NIOSH research focuses to maximize relevance and impact of the NIOSH injury-prevention-research program. Injury data, strategic goals, program activities, and research impacts were presented with a focus on prevention of four leading causes of workplace injury and death in the US: motor vehicle incidents, falls, workplace violence, and machine and industrial vehicle incidents. This paper showcased selected priority goals, activities, and impacts of the NIOSH injury prevention program. The NIOSH contribution to the overall decrease in fatalities and injuries is reinforced by decreases in specific goal areas. There were also many intermediate outcomes that are on a direct path to preventing injuries, such as new safety regulations and standards, safer technology and products, and improved worker safety training. The outcomes serve as an excellent foundation to stimulate further research and worldwide partnership to address global workplace injury problems.