Abstract: The ongoing COVID-19 pandemic, which plunging the entire aviation industry into a deep crisis and putting hundreds of thousands of airline jobs at risk, affects Thai Airways flight attendants, with high stressors towards their job insecurity. As human factors are considered critical aspects that influence safety in aviation, this study aimed to 1) examine the impact of job insecurity on Thai Airways flight attendants’ mental health during COVID-19 disruption, 2) investigate how they managed themselves to regain life satisfaction during the indefinite suspension of all scheduled flights, and 3) measure psychological distress development, a year after the airline announcement to halt all air services. The GHQ-12 (General Health Questionnaire-12), a self-administered instrument, was adopted to screen flight attendants’ psychological well-being. Five male and seven female flight attendants, who had the highest scores, indicating worse conditions between 9 to 11 of total scores 12, were selected for the in-depth online interviews in February 2020 and a year later in January 2021. The result showed psychological strains caused by prolonged stress that can lead to safety-related performance decrements when flight attendants need to perform safety-critical roles in emergencies. Hence, the flight attendants should have a mental health check-up before resuming regular commercial flight operations.

Disinfection of air conditioning rooms are related to reduce the risk of pathogenic epidemics. Various chemical and physical disinfection approaches are applied to the rooms for healthcare. In this study, efficacy of ultraviolet radiation on microbial elimination of air conditioning room was analysis. Ultraviolet chamber is constructed and assembled over the air conditioner in 25 cubic meter room. Ultraviolet-C (UVC) is radiated to airflow out of air conditioner. Five places of enrich media were placed on different position of room floor at different time interval for fifteen minutes. Plates were closed and reversed incubation at room temperature. Different types of microbial colonies on plates were counted. Average number of colonies from radiation on airflow room were analyzed and compared to those from non-radiation on airflow room (control). The result showed that ultraviolet radiation on conditioning airflow have efficiency on microbial reduction depending on the expose time. Furthermore, ultraviolet radiation may be effect on microbial cell injury because injured colonies were slowly growing and appearing in enrich media. Therefore, UVC radiation chamber assembled over the air conditioner have benefit on eliminating microorganisms in air conditioning room and will be used in enhancing efficacy on room disinfection for various healthcare purposes.

The rendezvous mission is one of the most useful and interesting in aerospace industry. Working together of multiple Unmanned Aerial Vehicles (UAV)s with limited space can cause the damage to UAVs. This research presents Unmanned Aerial Vehicle (UAV) rendezvous method that can approach UAV to another UAV with minimum displacement between them while they are moving. This rendezvous method is guided by Line-of-Sight (LOS) guidance law. The mission is guiding the UAV to join the route of another UAV to the end of mission with minimum displacement and without collision between them. Aerial Information and Robotics Simulation or AirSim which is working on Unreal Engine 4 software is presented. The positioning of UAVs is provided by Global Positioning System (GPS) sensor on both UAVs.

LoRa is a Low-Power Wide-Area Network (LPWAN) technology for Internet of Things (IoTs) application. Its advantages are low power consumption, inexpensive equipment cost, highly- secure access, and most importantly, good for long-range communication. Currently, LoRa network are extensively deployed worldwide. In the near future, that LoRa gateway may not be able to provide sufficient coverage for the ever-increasing deployment. A solution is to move the LoRa gateway up high to the satellite. The objective of this study was to theoretically investigate the feasibility of successful communication between ground sensor and LoRa gateway mounted in a satellite. In this study, sets of transmission parameters were analyzed whether, in principles, they would be able to support such kind of communication setup. For example, LoRa communicated in the frequency band 923 – 925 MHz in Thailand. Modified mathematical expressions were derived for link budget calculation. Using certain assumptions and this mathematical model, we discovered that, in principles, a suitable set of transmission parameters would be able to make the link budget sufficiently high so that this communication scheme would be feasible. The findings from this study may directly benefit developers of new applications of LoRa and IoTs satellite in their effort to design a communication scheme for their system. Nevertheless, the discovered feasibility was from the standpoints of theoretical matters. A valid experiment is needed in a future research to actually confirm this feasibility.

The Lunar Mission has involved with the different conditions from earth such as gravity, air pressure, temperature, lunar regolith and others. As a part of nuclear fusion project known in mini sun on earth, the Helium-3 is a fuel source from the moon. The clean energy will plan to use for extracting water, construction materials, fertilization, lunar agriculture and sustainable living in finally. The ore processing and extraction are needed to study more. The samples of lunar regolith have investigated from Apollo project until the created-prepared lunar regolith simulant from earth resource in various countries such as USA Europe India Russia and Thailand. The Thailand Lunar Simulant(TLS-01) in this research were reported the four parameters as physical properties, chemical composition, mineralogical characteristic, particle size distribution and the progress of mineral extraction by biomining method. The results found that the basalt rock from Trad province can use for the simulant material. The biomining can extract the necessary elements from the lunar regolith simulant which are Sodium Magnesium Iron Aluminum Titanium and Silica.