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Role of echocardiography in clinical hypertension
이재환,박재형 대한고혈압학회 2015 Clinical Hypertension Vol.21 No.8
Hypertension is amajorand correctable cardiovascular risk factor. The correct diagnosisofhypertension andprecise assessment of cardiovascular risk are essential to give proper treatment inpatientswithhypertension. Althoughechocardiography is the second-line study in the evaluationofhypertensivepatients, it givesmany clues suggestingbadprognosis associated with hypertension, including increased left ventricular (LV) mass, decreasedLV systolic function, impaired LV diastolic function, and increased left atrial size anddecreased function. Alongwith conventional echocardiographic methods, tissueDoppler imaging, three-dimensional echocardiography, and strain echocardiography arenewer echocardiographic modalities inthe evaluation of hypertensive patients in the current echocardiographic laboratories.Understandingconventional andnewer echocardiographicparameters is important inthediagnosis andassessmentof cardiovascular risk inhypertensivepatients.
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대형 트럭 하부 파손 방지를 위한 보호 장치와 IoT 연동 개발 검토
이재환 한국지식정보기술학회 2021 한국지식정보기술학회 논문지 Vol.16 No.4
Cargo trucks and wing body trucks carry a variety of cargoes and operate in a heavy state. When loading cargo, the height of the vehicle is lowered due to the weight, which causes the lowered vehicle frame to interfere with operation on irregular road surfaces and steep slopes. When a truck gets on or off a ship, the rear part of the truck hits the floor at the entrance of the ship, and damage to the lower part of the vehicle is frequent. Such damage to the lower part of the truck may cause a traffic accident due to the fall of the damaged parts, cause unexpected maintenance of the vehicle, and greatly threaten the safety of the driver. In conclusion, measures are required to prevent damage to the lower part of the truck, detect it at an early stage, and prevent fundamental damage. In this study, a protection device was conceived and designed to prevent damage to the lower part of the cargo truck, and the possibility of interworking with an IoT sensor that can detect the height and change of the truck was reviewed. In its form, it is based on the appearance of a structurally robust module with a number of link parts capable of absorbing dampers or shocks. The up and down operation regulates the pressure with an air bag or air pocket and works when the conditions required for operation are met to protect the underside of the vehicle. Simulations were performed under various conditions in consideration of fabrication.
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스마트폰을 활용한 대학과 조직 내에서 로컬 거래를 위한 마일리지 발행 및 관리 플랫폼 개발
이재환 한국지식정보기술학회 2021 한국지식정보기술학회 논문지 Vol.16 No.4
Local governments across the country are issuing their own local currency, and many people are actively using it with more discounts and savings than cash refills to revitalize local commercial areas due to the recent Corona 19. At the same time, an app called 'Danggeun Market' as a direct trading marketplace for buying and selling products in the vicinity of the region has secured many users and is evaluated as a successful establishment of the business. In this study, the market was compressed in the environment where transactions were formed in a wide range so far, and the use of scholarship points for university students, for example, the use of scholarship points, cash refill mileage, and employees in connection with welfare points for incumbents in a specific organization We developed a platform to conveniently enable various transactions that can be made there through QR codes, assuming transactions in stores and stores, and operated this system as a test to review practical application and propose future research. Mileage is a concept of incentives and can be recharged according to the performance of activities within the organization or by paying cash. Virtually constructing a store, transacting goods, services, and other services, and simulating payment and payment through a central management platform. In conclusion, the topic of subsequent research was proposed by strengthening the reliability of the block chain in the future and adding various application cases.
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