Gal Gangs, Worm Lessons, and Elephant Bones

By  Ann Bixel
Received: 2021-8-22 / Accepted: 2021-10-28 / Published: 2021-11-3
PDF Main Manuscript (296.1 KB)  DOI: https://doi.org/10.37906/isteamc.2021.9
Abstract Scientists today believe that many nonhuman animals possess emotions. Additionally they find that emotions are not limited to mammals, but that birds, reptiles, and fish also have feelings. Studying animal emotions may be the key to understanding creatures’ relationships with each other. In particular, What relationships do animals form when living in small groups? Ethologists observing animals in their natural habitats reveal many answers. First, animals in small groups employ a variety of leadership styles. Second, family relationships between parents and offspring, brother and sister, and elders and adolescents help the group survive and thrive. Third, when animals lose a member of their group, appear to grieve in ways synonymous to humans. As they examine these relationships, animal behaviorists, including famed ethologist Marc Bekoff, help us dive deeper into the lives of animal communities so we can live with them in harmony with them. [More...]

The investigation on the AC to DC voltage multiplier

By  Taige Chen
Received: 2021-10-25 / Accepted: 2021-12-7 / Published: 2021-12-20
PDF Main Manuscript (529.97 KB)  DOI: https://doi.org/10.37906/isteamc.2021.10
Abstract This paper investigates the topic of voltage multiplication, which converts a low AC voltage source to a high DC voltage source. Several designs are evaluated, such as the voltage doubler, the voltage tripler, and the voltage quadrupler. It is discovered that the input frequency and the capacitance do not affect the output voltage. This design can be extended to any integer multiples of the input voltage. [More...]

Energy harvesting through a piezoelectric sensor

By  Moojin Kim
Received: 2021-10-25 / Accepted: 2021-12-7 / Published: 2021-12-20
PDF Main Manuscript (527.22 KB)  DOI: https://doi.org/10.37906/isteamc.2021.11
Abstract Energy harvesting through motion caused by wind is a unique way of finding an alternative energy source for several electronic devices. Piezo-electronic sensors, which harvest energy from small vibrations and movements, are investigated by many researchers nowadays. This paper conducted an experimental study to find an alternative energy source for diverse electronics with forced oscillations from a fan. The relations between the force applied by wind and the oscillation of a paper strip were studied. [More...]