KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Search Results

Now showing 1 - 5 of 5

Some of the metrics are blocked by your
consent settings
Medical Delivery Drone
(2024-01-01)
Gantiya, Ladfah
;
Pintaviooj, Chuchart
One of the most important aspects of responding to a medical case is the response time. In general, most fatalities are due to the patient not being able to reach the hands of the doctor in time. This also includes the arrival of medical equipment to the scene. The human brain will start to degrade in function after 3 minutes of oxygen starvation which conventional road transportation method first responders presently use is usually unable to reach the site in 3 minutes, resulting in fatalities during transport or before the arrival of first responders at the scene. Therefore, medical equipment transport by fully autonomous aircraft is explored. This is done through drone deliveries which is much quicker than road methods as the equipment could be flown straight to the site. In this project, we will explore an aerial delivery system for medical equipment such as Automatic External Defibrillators (AEDs), First aid equipment, and other small requested medical devices. This will be done through a DJI drone platform and their SDK application. The main goal for this project is to decrease the response time by using an autonomous aerial drone to deliver medical equipment. We have found that the drone is a capable platform to deliver an AED to a patient through the collected flight data and basic testing which provided us a great platform for further development of the system.
Some of the metrics are blocked by your
consent settings
Non-monotonic evolution of the responses of ZnO-nanoparticle UV-sensitive devices under ambient aging
(2023-08-01)
Sratongkham, Pittayathorn
;
Chuenchom, Rattana
;
Tuantranont, Adisorn
;
Lomas, Tanom
;
Wasapinyokul, Kamol
Ultraviolet (UV) sensitive devices based on spin-coated zinc-oxide nanoparticles (ZnO) were fabricated and characterised. They were subsequently stored in the ambient and dark conditions with low humidity for 56 days, during which time they were intermittently recharacterised to determine the aging effect on their sensing properties, including responsivity, sensitivity, and response and recovery times. Over the 56-day period, both the dark and illumination currents increased, causing the non-monotonic evolution of the performances of the devices – the responsivity improved by 9–18 folds, the sensitivity remained stable, and the response and recovery times deteriorated as they were 46 and 33 times longer, respectively. These changes were associated with an increase in the number of adsorbed oxygen molecules on the ZnO surface with time. This resulted in more photodesorbed oxygen molecules and thus more remaining charge carriers under illumination, which increased the photo-generated current and consequently responsivity. However, it also caused the current to rise and decay more slowly when the illumination appeared and disappeared, respectively, leading to the prolonged response and recovery times. The longer recovery times led in an increase in dark current, which, when combined with an increase in illumination current, resulted in a stable sensitivity. The trends of these sensing parameters were similar, but to varying degrees, regardless of the change in the radiation levels and ZnO layer thicknesses.
Some of the metrics are blocked by your
consent settings
Icon concreteness effect on selection speed and accuracy
(2018-04-23)
Satcharoen, Kleddao
The purpose of this research is studying the interaction of icon concreteness and response time in a sample of experienced users of a popular real-world software program (n = 100 users). The research used an experimental approach, with three trials of six icons each (three abstract and three concrete icons), for a total of 1800 trials. The results showed that reaction times were similar for concrete and abstract icons. However, response accuracy was different. While accuracy of fast reactions (3 seconds or less) was similar, a chi-square analysis showed statistically significant differences in accuracy for the three longer reaction times (4-6 seconds, 7-9 seconds, and 9+ seconds) (p < 0.05). The results imply that even for experienced users, icon concreteness makes a difference in semantic distance and cognitive processing load, resulting in differences in response accuracy. Thus, even programs designed for experienced users should use more concrete icons where possible.
Some of the metrics are blocked by your
consent settings
PLC-based industrial temperature controller with different response times
(2017-12-13)
Gulpanich, S.
;
Krongratana, V.
;
Srimuang, Arthit
;
Tipsuwanporn, V.
;
Wongvanich, N.
This work presents a temperature control of industrial ovens using block FB58 'TCONT-CP' from the Siemens S7-300 PLC, which is evaluated by the OB35 interrupt. Two plants were considered. The first plant was a small industrial oven made of aluminum of size 1.5 cm × 5 cm and taking in 60 W of heat. The second plant was a large industry oven with a 0.125 m<sup>3</sup> capacity, capable of exuding 1500 W of heat. Both experiments were controlled by the same Block Command and ovens were tested separately. The Cohen-Coon PID tuning method was firstly applied to both plants, with a separate controller values being obtained for each plant. These values were kept fixed throughout the experiments. A tailored approach was adopted whereby a pulse gen was used in conjunction with the PID control for the small plant; whereas a control zoning was used for the larger plant. Result show that the tailored approach yielded significant improvements in settling times compared to a conventional PID controller.
Some of the metrics are blocked by your
consent settings
A fast response high voltage measuring system based on saline solution
(2014-11-05)
Phoaphan, Busayapol
;
Triruttapiruk, Nawakun
;
Yutthagowith, Peerawut
This paper presents design and construction of a simple structure voltage measuring system with high energy absorption capability and fast response for measurement of nanosecond pulse voltage. The measuring system is composed of a high voltage divider and an attenuator. The high voltage part of the divider was constructed from saline solution contained in a plastic tube. The low voltage part of the divider and also the attenuator were constructed from metal film resistors enclosed in an aluminium housing. The voltage rating is 300 kV and the high voltage resistance is 11 kΩ. The developed measuring system has been tested according to the standard of IEC 60060-2 composing of a scale factor test, a withstand voltage test, a short term stability test. From the experimental results, the developed measuring system has good performance in measurement of the steep front voltage according to the standard of IEC 61211. From the unit step response test, the partial response time of the measuring system is less than 3 ns, the over shoot is 36%, and settling time is less than 150 ns. This accomplishment will be advantage for increasing capability of HV laboratory and for researches being about effect of fast transient voltage in transmission and distribution systems in Thailand.

KMITL

Browse

Filters

Settings

Sort By

Results per page

Search Results