Journal of Technology and Social Science (JTSS, J. Tech. Soc. Sci.)
An international open-access peer-reviewed journal
TABLE OF CONTENTS
A Holistic View of University and Its Governance
Journal of Technology and Social Science, Vol.2, No.3, pp.1-5, 2018.
Abstract: In this short article, I will first outline the blueprint of the complex systems governing a modern university. Then, I will discuss some better ways of conducting teaching/learning, research/innovation, and appraisal/promotion in a modern university.
The Learning Effects of Visualizing Sound Waves using Augmented Reality in Middle School Science Education
Yuki Aoki, Sho Imachi and Takeshi Kase
Journal of Technology and Social Science, Vol.2, No.3, pp.6-13, 2018.
Abstract: We developed an augmented reality (AR) teaching material to help beginning students learn about sound waves, especially in terms of their propagation and the generation of oscilloscope waveforms. We implemented this study in the classroom with 125 seventh-grade students who had already learned about sound waves through traditional instructional methods. We examined the learning effects of the AR teaching material by comparing the results of the pre- and post-tests. The outcomes showed that using AR to represent sound waves – an invisible phenomenon – is an effective approach for improving studentsf understanding of the concept.
A Concept of Culture Space and Its Possible Application to Achieving Durable Peace
Journal of Technology and Social Science, Vol.2, No.3, pp.14-18, 2018.
Abstract: In religions, three basic questions are: Who Am I? Where does I come from? Where am I going to? And, Buddhism has further raised the following three specific questions: Why do we become old? Why do we become sick? Why do we die? Since thousands of years ago, the quest to the answers to these questions has not yet brought durable peace on Earth at the world-wide scale. This situation motivates us to deepen investigations on solutions to durable peace on Earth. In this paper, three new questions are raised, which are: Who is the designer of a human being? Who is the maker of a human being? Who are the users of a human being? The quest to the answers to these new questions leads to the discovery of the concept of culture space. After the explanation of the new concept of culture space, this paper sheds light to the details of the culture spacefs three principal axes for referencing values which are the ultimate causes behind all social and individual activities as well as behaviors. And, these three references for gauging values stipulated in this paper are: people-centric reference for values, family-centric reference for values, and customer-centric reference for values. The culture space is the domain in which all individual minds and social minds evolve and develop. All the differences of behaviors among people, populations and countries are reflected by the paths or trajectories of their cultures in the culture space.
A Study on Loop Gain Measurement Method using Output Impedances in Operational Amplifier
Muhammad Anwar Bin Mohd Yusof, Nobukazu Tsukiji, Yasunori Kobori, Anna Kuwana and Haruo Kobayashi
Journal of Technology and Social Science, Vol.2, No.3, pp.19-28, 2018.
Abstract: This paper describes a method to derive the loop gain and phase from the output impedances in analog circuit with negative feedback. Especially, we extend our previously proposed method for a DC-DC buck converter, to the operational amplifier circuit with negative feedback. This enables to measure the loop gain without injecting a signal into feedback loop, i.e. without breaking the feedback loop; hence the proposed method can be applied for the operational amplifier circuit with negative feedback implemented on an IC. Our simulation results show that the loop gain obtained from the proposed method matches very well with the one from the conventional method.
Disturbance Compensation in Slow-Mode Based Control for MIMO Delay System
Y. Jiang, L. Yuan, S.Xu, K. Yoshida, S. Hashimoto, K. Izaki, T. Kihara, R. Ikeda and W. Jiang
Journal of Technology and Social Science, Vol.2, No.3, pp.29-35, 2018.
Abstract: In order to achieve high-quality and high-performance thermal processing, multi-input multi-output temperature control is required. In this paper, the slow-mode based temperature control incorporate with disturbance compensation is proposed. Two types of disturbance compensator are designed and compared by simulations. In simulation, the stable range of plantfs parameter variation for the system with the disturbance compensation is also evaluated.
A Proposal of 3D Measurement of Velocity in the Drop-ball Experiment by the Levitation Mass Method
Hadi Nasbey, Akihiro Takita, Agus Setyo Budi, Eko Satria, Mitra Djamal and Yusaku Fujii
Journal of Technology and Social Science, Vol.2, No.3, pp.36-42, 2018.
Abstract: The method of 3D measurement of velocity in the Drop-ball experiment by the Levitation Mass Method is proposed. In the drop-ball experiment, the spherical body containing a cube corner prism is dropped from initial high onto the material under test. The velocity of the spherical body is measured using an optical interferometer as the function of the Doppler shift frequency. The position and acceleration of the spherical body are calculated by integrating and differentiating the velocity, respectively. The force acting on the spherical body is calculated as the product of the mass and the acceleration. The impact force generated at the contact point of the spherical body collided the material under test is measured accurately by this experiment. In order to measure the velocity of the spherical body around the contact point of a colliding material in three coordinates axes. Theoretical calculation of the proposed method is explained.
A Simulation of Multi-Layers Quantum Key Distribution with Enhancing Ability for Against PNS Attacks
Journal of Technology and Social Science, Vol.2, No.3, pp.43-50, 2018.
Abstract: This paper presents the simulation results of a modified quantum key distribution (QKD) protocol with an enhancing ability for against the photon number splitting (PNS) attack. By performing the proposed protocol with specified parameters as k = 1024 bits, correspond to y = 10 bits, and repeating rounds n = 10, the probability that eavesdropper can obtain the shared secret key will remain as only 3.94~10-31. Furthermore, by dint of the enhancing ability to against the PNS strategy, the multi-layers QKD application can be realized and consequently possible to achieve a higher useful bits rate. The performance of key distribution has been demonstrated by the relationship of the useful bits rate as a function of the optical link distance between the two parties, referred to Alice and Bob. The QKD system parameters are specified as the light pulses rate of 1 GHz and 10 GHz and the photon number of Ê=1. The optical link attenuations of 2.0, 0.35, and 0.25 dB/km. The detector efficiencies of 50%, 20%, and 10%, with the dark count probabilities of 10-7, 10-5, and 10-5. Each is for the light pulses of 800, 1300, and 1550 nm, respectively. From the simulation results, the useful bits rate in each optical wavelength of approximately 24.2 kbit/s, 111.8 kbit/s, and 12.1 kbit/s can be achieved for the distances of 20 km, 80 km, and 120 km, respectively. Besides 97.0 kBit/s with 1550 nm at 120 km for 8-layers system. The potential of using such the proposed protocol with a multi-layers QKD system is performed and discussed.
Behavior-Monitoring System for Infants Napping During Midday
Yuuki Tanaka, Nobuaki Nakazawa, Yoichi Shiraishi, Kazuhiro Motegi, Hisaki Watari
Journal of Technology and Social Science, Vol.2, No.3, pp.51-55, 2018.
Abstract: In this paper, we propose a system to monitor infantsf midday naps at a nursery school. The system is designed to detect an infant (1) leaving the mattress, (2) turning over on the mattress, or (3) ceasing their breath. The system comprises sensor pads for each infant and a server. Each sensor pad collects a set of pressure data via pressure sensors and sends the data to a server via wireless local area network. The server collects data from each pad and analyzes it to extract information about the infantfs behavior.
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