The main problem of airport noise is the impact of aircraft noise on the residents around the airport. In order to investigate the noise situation of a certain airport in South Korea, this article selects Muan Airport as the research project, selects five measurement points near the airport, takes aircraft takeoff as an example, measures the maximum noise level of each measurement point during each take off, and uses the American Airport Noise Prediction Software (AEDT 3C) to predict the noise of a single aircraft during take off, Calculate the contour area and sound exposure level data for four aircraft models. The results indicate that the average maximum noise level error between the measurement results and the simulation results is within 2dB, and the maximum noise level ranges from 65.1 to 88.1 decibels with the measurement range.

The airport is chosen as the measurement airport in this paper to investigate the noise characteristics of piston engine aircraft used for training at Muan airport. Five measurement points near the runway are chosen. The maximum noise values of piston engine aircraft (C172) and SR20 take-off processes are measured. The results show that the average maximum noise values of the five measuring points range from 66.5 dB(A) to 76.7 dB(A), with point C having the greatest noise influence. During take-off, the maximum noise of an SR20 aircraft occurs near 500Hz of low frequency.

Aircraft noise is something humans don't want. In this study, based on the Rotax 914 engine used in Korea, the propeller blade angle was changed by 1 degree and the engine RPM was changed to review the three-wing “G Company” propeller and the three-wing GSC wooden propeller. Select the best propeller pitch angle by measuring the change in propeller noise and thrust and the change in engine RPM due to the change in noise and thrust. We would like to present a propeller pitch angle suitable for the location of the airfield and the operation of the aircraft. Based on this, we would like to help resolve noise complaints around the airfiled.

Noise is a sound that people don't want. In this study, noise is measured for SR20, a general aviation trainer used in Korea. In addition, noise measurement points are selected at Muan Airport, where most of the domestic trainers fly under the supervision of the Ministry of Land, Infrastructure and Transport, and the measured data are analyzed based on this. We also want to analyze the noise characteristics of SR20 aircraft through frequency analysis of the noise characteristics of SR20 aircraft are unique. We want to use this to understand what type of noise the trainer affects in future studies. this study will improve the reliability of the noise prediction scenario by comparing and analyzing the actual measured and predicted values when using the noise prediction program.

Metal material production process machinery is becoming larger due to the development of industry. Since there are many overseas manufacturers of large machines used in industrial fields, there are limitations in investigating the manufacturer's noise prediction method and measurement method. A noise map was prepared to obtain information necessary for noise reduction and to effectively manage noise companies. It was modeled with the drawings provided to prepare the noise map and the results of the actual measurement of the site. In order to improve the noise environment of workers, there was a noise reduction effect when a soundproof wall was installed between the noise source and the worker's workplace.

Most domestic pilots are trained at local airfields using propeller aircraft. Training aircraft are mainly trained in the airspace around the aerodrome, and mainly take-off and landing exercises that require a lot of practice among flight control skills. Aircraft noise is a sound that humans do not want. In this study, based on the Rotax 914 engine used in Korea, the propeller blade angle was changed by 1 degree for the 3-leaf “K company” propeller and the 3-leaf GSC wooden propeller, and the engine RPM was changed to examine the noise and thrust changes. The purpose of this study is to check whether noise and thrust loss are the least at the engine's maximum RPM, and to propose an aircraft operation plan in the noisy aerodrome area based on the values.

Noise is a sound that humans do not want. In this study, noise is measured for C172, the most frequently used general aviation trainer in Korea and abroad. In addition, in this study, noise measurement points are selected for Muan Airport, where most of the domestic training aircraft fly under the supervision of the Ministry of Land, Infrastructure and Transport. Based on this, the measured data is scaled and analyzed. In addition, we intend to analyze what characteristics C172 aircraft have unique through frequency analysis of noise of C172. Through this, it is intended to understand what type of noise training aircraft affect in future studies.

Noise is a sound that humans do not want. In this study, Based on the Rotax 912 engine, which is most commonly used in Korea, we will look at noise and thrust changes by changing the propeller blade angle by 1 degree for the two-blade Sensenich Propeller and the three-blade Wrap drive Propeller. Through this, we want to check which part of the propeller angle produces the least noise and the least thrust loss for each propeller, and propose a propeller operation plan in a noisy area based on the value.

This study indirectly measures the vibration value corresponding to the abnormal vibration generated by the small engine for light aircraft to which the dual carburetor is applied by the pressure difference from each carburetor. It relates to a system for outputting a warning to a pilot, comprising two pressure gauges for measuring the pressure from each carburetor and a warning signal output unit for outputting a warning signal corresponding to the pressure difference measured by the two pressure gauges do.

Noise is unwanted sound and nerve jarring sound or mentally and physically harmful sound to the human body. In the 20th century, the aviation industry have been comprehensive industry of all areas and humanity have been globalized, the number of aircraft operated have been increased continuously. We confirmed that the actual measured noise data was consistent with the aircraft average noise data to calculate noise maps of INM version 7.0. and based on this, the actual flight scenarios and the noise map were created. For making the noise map, we assumed that the maximum number of flight is operated.

본 연구는 3년생 ‘Fuji Mishima’/M.9의 주간에서 직접 발생한 3년생 주지를 강하게 하수유인한 후 상처를 받았을 것으로 예상되는 만곡부위를 채취하여 하수유인 1, 3, 5, 15일 후의 모습을 관찰하였다. 하수유인 1일 후에는 각 조직이 아직 상처받지 않고 잘 발달된 모습이 관찰되었다. 하지만 3일 후 검경한 결과에서는 하수유인 처리된 하부에서 체관부와 물관부가 다소 눌림 현상이 관찰되었다. 유인 후 5일 후에 검경한 결과, 가지의 상부와 하부 모두에서 체관이 일정한 위치에서 이탈된 모습이 관찰되었다. 유인 15일 후에 하수유인 된 가지의 하부 조직에서 수피조직(주피)까지 파괴된 모습이 관찰되었으며, 체관부의 피해도 특히 심하였고, 이 부위에 새로 형성된 조직이 있는 것이 발견되었다. 유인하지 않은 나무에 대하여 에틸렌 발생량을 측정하였으나 에틸렌은 검출되지 않았고 유인한 가지에서는 처리 3일 후에 에틸렌 발생이 증가하였고 6일 후에는 절반으로 감소하였다.

The aim of this study was to analyze differences in the perception of Gangwon-do residents using a satisfaction survey. The residents were found to be most satisfied with sectors such as parks/green spaces, landscape, and public order; however, they were least satisfied with transportation, culture, sports, medical services, and welfare facilities. Additionally, among all the items in the satisfaction survey, job satisfaction was the lowest. When comparing satisfaction trends observed in the city to those of the county, the overall satisfaction of the county was found to be slightly higher. This result could be attributed to young people being underrepresented in this survey in conjunction with the greater policy-level support for middle-aged people by from the government and Gangwon-do. Therefore, it would be worthwhile to create policies that primarily support young people and to also to create high-quality jobs with stable pay and employment prospects. This could minimize the outflow of youth and even encourage their inflow to similar small provincial cities. In Southern region and Seorak region of Gangwon-do, the satisfaction with gap between house price and region was low, which might be related to the increased demand for real estate throughout this area.

This research was conducted to propose the basic direction of a smart city plan for the satisfaction of residents of Gangwon-do . Initially, the awareness of smart cities among the residents of Gangwon-do was as follows: The response “I have no idea” was 21.7% higher and “I do not know the details, but have heard of it” was 15.1% lower than the awareness among residents across the nation. Based on these results, it was confirmed that awareness was very low despite the government’s smartification reinforcement policy. In addition, the residents of Gangwon-do expected that their time would be saved and their living convenience would increase but were worried that their privacy would be invaded and that the conflict between generations would intensify. Thus, it is necessary to develop a plan to enhance the awareness of smart cities, as well as a plan to enhance digital awareness. Second, based on the importance of and satisfaction with the urban problem response system examined among the residents of Gangwon-do, it seems necessary to prioritize improvements in public space control and administrative problem responses involving deteriorated parks/plazas, pedestrian environment, and administrative processing inefficiency and fairness. Additionally, the first prioritization priority of the residents of Gangwon-do was “health/welfare/medical service” (27.7%); the second and third highest priorities were “transportation service” (26.3%) and “environmental service” (19.0%), respectively. In particular, as “transportation service” was highly preferred in the Chuncheon and Wonju regions and “health/welfare/medical service” was highly preferred in the Gangneung, Sokcho, and other southern regions, it was confirmed that the level of urbanization is deeply associated with smart services.

최근 기상변화에 의한 집중호우는 하천의 통수능력을 초과하는 홍수를 발생시키고 있다. 하천의 폭이 제한된 상태에서 이러한 초과 홍수에 대비할 수 있는 관리방법은 제방증고, 저류지 및 방수로 건설, 하상 준설 등을 생각할 수 있다. 천변저류지인 화순홍수조절지는 저류지와 수위조절을 위한 제수문이 설계되어 있다. 본 연구는 저류지 운영시간동안 일정 홍수량만을 배제해야 할 상황에 대해 설계의 적정성을 수리모형실험을 통해 검토하였다. 검토결과 저류지 유입부의 횡월류위어 월류량은 설계상의 월류량을 초과하였고, 제수문 1.1 m 개방시 설계유량(326 m3/s)을 방류할 수 있는 것으로 나타났다. 설계유량 방류시 제수문 직하류에 7.19 m/s의 고유속은 baffle block을 설치할 경우 3.3 m/s까지 저감시킬 수 있는 것으로 검토되었다.