Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Bo-Hwa Lee"'
Autor:
Hee Jung Min, Sang-Hee Park, Seung-Hyun Lee, Bo-Hwa Lee, Mikyung Kang, Mi Ju Kwon, Myung Ju Chang, Lobsang Tenzin Negi, Tsondue Samphel, Seunghee Won
Publikováno v:
Behavioral Sciences, Vol 14, Iss 6, p 458 (2024)
This study explored the positive effects of a six-week Social–Emotional and Ethical Learning® (SEE Learning) program on resilience and social and emotional competences, adapted for elementary students in Daegu, South Korea, a region strongly affec
Externí odkaz:
https://doaj.org/article/4c7fdd3e230a4b41b10b2ac9692aa905
Publikováno v:
Journal of the Korean Society of Propulsion Engineers. 25:68-76
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2a698d8bc5d9cfaf4b8d30346f170703
https://doi.org/10.6108/kspe.2021.25.1.068
https://doi.org/10.6108/kspe.2021.25.1.068
Autor:
Kyung-Jae Lee, Kim Yong Gyoo, Chun Taek Kim, Woong Kang, Saeng Hee Lee, Yong Moon Choi, Bo Hwa Lee
Publikováno v:
Journal of Mechanical Science and Technology. 33:5271-5276
The air flowrate in the engine inlet is an important parameter used to calculate common performance metrics such as the thrust and specific fuel consumption of a gas turbine engine. In the Korea Aerospace Research Institute (KARI) altitude engine tes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c04a90be5f07c67ff04ad3a31c3dd49
https://doi.org/10.1007/s12206-019-1018-2
https://doi.org/10.1007/s12206-019-1018-2
Publikováno v:
International Journal of Aeronautical and Space Sciences. 20:346-354
The Korea Aerospace Research Institute runs the ground-based Altitude Engine Test Facility (AETF) for simulating high-altitude environments. This facility is widely used to test the performance of gas turbine engines at ground level to high altitudes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3332bb8cda4106c16ec8346bebd892b0
https://doi.org/10.1007/s42405-019-00153-w
https://doi.org/10.1007/s42405-019-00153-w
Autor:
Bo-Hwa Lee, Inyoung Yang
Publikováno v:
The KSFM Journal of Fluid Machinery. 19:5-10
Gas flow measurement in a closed duct was performed using multi-point Pitot tubes. Measurement uncertainty was assessed for this measurement method. The method was applied for the measurement of air flow into a gas turbine engine in an altitude engin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49a70b2f7d831e50dab3cf53223eeb00
https://doi.org/10.5293/kfma.2016.19.2.005
https://doi.org/10.5293/kfma.2016.19.2.005
Publikováno v:
Journal of Mechanical Science and Technology. 28:399-405
The target mid-class UAV system used in this study consists of three types of power sources operating simultaneously. These power sources are designed and constructed to share the same operation voltage range and connect to the power bus without addi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd3fdfbc7b3a7f9613baee6930dbfa9c
https://doi.org/10.1007/s12206-013-0936-7
https://doi.org/10.1007/s12206-013-0936-7
Publikováno v:
Journal of the Korean Society for Aeronautical & Space Sciences. 40:940-947
The target system is a middle size UAV, which is a low-speed long-endurance UAV with a weight of 18 kg and wingspan of 6.4 m. Three electric power sources, i.e. solar cells, a fuel cell, and a battery, are considered. The optimal takeoff time is dete
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f68070e4ccc37b85e908f4f6d0f6062d
https://doi.org/10.5139/jksas.2012.40.11.940
https://doi.org/10.5139/jksas.2012.40.11.940
Publikováno v:
Journal of Mechanical Science and Technology. 26:2291-2299
Power managements of a UAV’s hybrid electric propulsion systems are described. Three electric propulsion systems with different power sources, i.e. solar cells, fuel cells, and batteries are considered. Each power source is modeled in Matlab/Simuli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f37d7aac87c55e56a561db644ce7693
https://doi.org/10.1007/s12206-012-0601-6
https://doi.org/10.1007/s12206-012-0601-6
Publikováno v:
Journal of the Korean Society for Aeronautical & Space Sciences. 39:1052-1059
It is conducted that power characteristic variation simulation of electric propulsion system that uses fuel cells, solar cells and a battery as power sources. Combining each power source, 400W electric propulsion system have been modeled and verified
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ce25c6f14b1806a399db08f1e3b71ce
https://doi.org/10.5139/jksas.2011.39.11.1052
https://doi.org/10.5139/jksas.2011.39.11.1052
Publikováno v:
Journal of the Korean Society for Aeronautical & Space Sciences. 39:927-934
Design parameter analysis is performed for a solar-powered UAV, storing potential energy by climb flight. Parameters related to the flight for sa ving potential energy, i.e. minimum & maximum altitudes for level flight, gliding & climbin g angle, des
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61373aa56c8c99c5c40f1d1ab2bee045
https://doi.org/10.5139/jksas.2011.39.10.927
https://doi.org/10.5139/jksas.2011.39.10.927