• Journal of Korean Society for Geospatial Information Science
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• v.17 no.3
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• pp.115-120
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• 2009

Point-based methods with experienced human operators are processed well in traditional photogrammetric activities but not the autonomous environment of digital photogrammetry. To develop more robust and accurate techniques, higher level objects of straight linear features accommodating element other than points are adopted instead of points in aerial triangulation. Even though recent advanced algorithms provide accurate and reliable linear feature extraction, extracting linear features is more difficult than extracting a discrete set of points which can consist of any form of curves. Control points which are the initial input data and break points which are end points of piecewise curves are easily obtained with manual digitizing, edge operators or interest operators. Employing high level features increase the feasibility of geometric information and provide the analytical and suitable solution for the advanced computer technology.

• Current Industrial and Technological Trends in Aerospace
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• v.9 no.1
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• pp.15-26
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• 2011

The airliners are replacing their old fleet by brand new ones while the air traffic has recovered from the great recession. And the delivery and the backlog get almost highest record still in 2010. The single aisle leads the market and it will show harder competition with more efficient challengers. The recent strong demand of new aircraft reduces MRO and lease market and it makes some worries about the bubble in civil aircraft industry. In the long time forecast, the civil aircraft industry will grow steadily with over 60,000 delivery for 20 years. and the commercial aircraft market will be about 31,000~34,000 of them. And the emerging market will lead the growth.

• Korean Journal of Remote Sensing
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• v.25 no.5
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• pp.391-398
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• 2009

Variations of mean ionospheric spatial gradient over Korea are analyzed in order to support GNSS (Global Navigation Satellite System) augmentation systems and integrity monitering systems. A software for analyzing the ionospheric spatial gradient is developed using an ionospheric plate model. Daily and annual variations of ionospheric delay and spatial gradient are analyzed using GPS data in 2003 and 2005 respectively. The ionospheric delays and spatial gradients in 2003 were larger than 2005. Also, the south-north gradient, about -1.0mm/km, is nearly two times larger than the east-west gradient. The annual ionospheric spatial gradients over Korea is varied within 2mm/km.

• Journal of Aerospace System Engineering
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• v.16 no.6
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• pp.18-23
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• 2022

This paper examines the electromagnetic shielding structure of ultra-high frequency (UHF) RF modules used in aircraft. Advances in electrical and electronic technologies have increased the need for electronic equipment in aircraft. High-frequency wireless devices have become integrated circuits in the form of UHF integrated circuits to support a wide range of frequencies and miniaturisation. To ensure the functionality and performance of these integrated devices in aviation, shielding is necessary to prevent unexpected electromagnetic interference, which could be detrimental to aircraft safety. A shield structure was designed to protect the RF chipset from malfunctioning, and the shielding effectiveness was improved through the application of various geometric shapes.

• Korean journal of aerospace and environmental medicine
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• v.31 no.2
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• pp.54-56
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• 2021

Atopic dermatitis is a condition that makes skin red and itchy. It is common in children but can occur at any age. Atopic dermatitis is chronic and tends to flare periodically. The pathogenesis of the disease has not yet been clearly elucidated but genetic predisposition, immunological dysfunction, and environmental factors are presumed to be involved in the pathogenesis. In general, it is difficult to cure, but as time passes, most of them heal naturally and the symptoms disappear, but the symptoms continue to recur. So, the basic treatment is to relieve the pruritus and prevent it from reoccurring. Treatment involves avoiding things that make the condition worse, daily bathing with application of moisturizing cream afterwards, applying steroid creams when flares occur, and medications to relieve itching sensation. Steroid pills or creams based on calcineurin inhibitors may occasionally be used if other measures are not effective. When examining a pilot with atopic dermatitis, the dermatitis condition, the treatment being used, and the side effects of the medications should be considered. This case involves an otherwise healthy applicant for the 1st class medical certification who has had atopic dermatitis.

• Korean journal of aerospace and environmental medicine
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• v.31 no.3
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• pp.64-67
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• 2021

When the COVID-19 crisis hit air transport, the whole aviation industry was affected. The change in the behavior of passengers following the COVID-19 crisis, travel restrictions and the ensuing economic crisis have resulted in a dramatic drop in demand for airline services. The COVID-19 pandemic, with all its associated consequences, has had a significant impact on the mental health and well-being of pilots, which could impact operational safety. As the number of international flights has decreased, pilots are exposed to high levels of psychological stress such as job instability, reduced income and increased risk of infection during flight work. Psychological stress lowers work performance and threatens aviation safety. The pilot needs mental health management during the COVID-19 pandemic, but psychological support is weak. For pilot mental health management, it is important to raise awareness about mental health and to continuously respond. To this end, it is necessary to foster a safe and trustworthy culture in which mental health issues are discussed freely and solved together without hiding them. They should also support the establishment of a peer support program that is easily accessible and that allows pilots to discuss their issues with confidence.

• 한국벤처창업학회:학술대회논문집
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• 2021.04a
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• pp.165-170
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• 2021

최근의 코로나19 사태로 관광·항공업계가 극심한 어려움을 겪고 있다. 항공업계의 대안 중 하나는 화물운송이다. 항공사들은 여객수요 급감으로 인한 매출감소 폭을 줄이기 위하여 화물운송 부문을 강화하고 있다. 항공화물운송은 타 운송과 구분되는 제반 특성으로 인하여 시장규모가 지속적으로 증가하고 있다. 항공화물운송 대리점(forwarder)은 수출과 수입에 있어서 중요한 역할을 담당하며, 중요한 비즈니스 파트너인 항공사와 수출입자와 우호적인 긴밀한 관계를 구축하고 계속 유지해야 한다. 사회적 교환이론(social exchange theory)은 이러한 관계가 구축되기 위해서는 거래당사자 간의 거래규모나 거래기간, 거래빈도 등의 유형적인 측면도 중요하지만, 신뢰와 몰입, 애착 등의 무형적인 측면의 교환이 선행되어야 한다는 것을 강조한다. 본 연구의 연구목적은 다음과 같다. 첫째, 물류서비스기업의 업무 프로세스를 규명하고 운송기업 및 화주기업과의 사회적 교환행동은 어떻게 이루어지는지 조사한다. 둘째, 이러한 사회적 교환행동이 물류서비스기업의 다양한 경영성과에 얼마나 영향을 미치는지를 분석한다. 셋째, 각 구성원 간의 관계기간에 따라서 이러한 영향력이 달라지는지를 살펴본다. 특히 본 연구는 많은 기존연구에서 구분되었던 신뢰(trust)와 몰입(commitment) 개념을 통합함으로써 연구모형의 간결성(parsimony)과 실용가능성(practicality)을 제고하고자 한다. 결과적으로 본 연구는 운송기업 및 화주기업에 대한 물류서비스기업의 사회적 행동이 신뢰에 기반한 우호적인 관계를 구축하는지, 경영성과에는 어떤 영향을 미치는지를 실증적으로 살펴보고, 관계기간의 조절효과를 규명함으로써 학문적으로나 실무적으로 유용한 시사점을 제공할 수 있으며, 창업 물류서비스기업에 유용한 가이드라인을 제시할 수 있을 것이다.

• Korean Journal of Remote Sensing
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• v.39 no.6_3
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• pp.1671-1678
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• 2023

The Korea multi-purpose satellite (KOMPSAT) series consisting of multi-sensors has been used in various fields such as land, environmental monitoring, and disaster analysis since its first launch in 1999. Recently, as various information processing technologies (high-speed computing technology, computer vision, artificial intelligence, etc.) that are rapidly developing are utilized in the field of remote sensing, it has become possible to develop more various satellite image processing and analysis algorithms. In this special issue, we would like to introduce recently researched technologies related to the KOMPSAT image application and research topics participated in the 2023 Satellite Information Application Contest.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.32 no.3
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• pp.79-94
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• 2024

The purpose of the paper is to study the turnover intention of employees during the phenomenon of job insecurity. The paper examines the direct effect of job insecurity on turnover intention and the moderating role of perceived organizational support and departments in this relationship. The analysis has been done using the PROCESS macro. with the empirical data of employees of FSC(Full Service Carrier) airlines. The conclusions of this article are as follows. The paper finds that job insecurity is an antecedent to the turnover intention. This relationship is explained by perceived organizational support in detail by departs. Besides, the study establishes perceived organizational support and departs as moderator, and with high POS, strength of the relationship of job insecurity on turnover intention will be increased and varied depending on the departs. Through this findings can provide important implications as a basis for restoring organizational resilience and employee awareness, which can help in stable operation of the company.

• Journal of Advanced Navigation Technology
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• v.25 no.1
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• pp.115-123
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• 2021

Pine nuts are Korea's representative nut forest products and profitable crops. However, pine nuts are harvested by climbing the trees themselves, thus the risk is high. In order to solve this problem, it is necessary to harvest pine nuts using a robot or an unmanned aerial vehicle(UAV). In this paper, we propose a deep learning based detection method for harvesting pine nut in UAV aerial images. For this, a video was recorded in a real pine forest using UAV, and a data augmentation technique was used to supplement a small number of data. As the data for 3D detection, Unity3D was used to model the virtual pine nut and the virtual environment, and the labeling was acquired using the 3D transformation method of the coordinate system. Deep learning algorithms for detection of pine nuts distribution area and 2D and 3D detection of pine nuts objects were used DeepLabV3+, YOLOv4, and CenterNet, respectively. As a result of the experiment, the detection rate of pine nuts distribution area was 82.15%, the 2D detection rate was 86.93%, and the 3D detection rate was 59.45%.