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Jen S.U.,Academia Sinica, Taiwan | Chiang F.L.,Academia Sinica, Taiwan | Cheng W.C.,NTUST | Lo Y.Y.,Academia Sinica, Taiwan | Pai L.W.,Academia Sinica, Taiwan
Materials Today: Proceedings | Year: 2016

Fe81-XNiXGa19 alloys, with x = 0 - 26 at.%Ni, were made from in induction furnace. The structural properties of each alloy were analyzed by x-ray and selected area diffraction within a plane-view transmission electron microscope image. For the Fe81Ni19 alloy, it contains the disordered A2 (matrix) and ordered D03 phases, but when Fe has been replaced by Ni in the Fe81Ga19 alloy, it contains the disordered A2 (matrix), ordered B2, and ordered D03 phases. From this study, it is concluded that the Fe70Ni11Ga19 alloy should be a good functional material for transducer and energy harvesting applications. © 2016 Elsevier Ltd.

Jen S.U.,Academia Sinica, Taiwan | Cheng W.C.,NTUST | Chiang F.L.,Academia Sinica, Taiwan
Journal of Alloys and Compounds | Year: 2015

In this study, we discussed the structural, magneto-mechanical, and damping properties of slowly-cooled polycrystalline Fe81Ga19 alloy. From the X-ray diffraction, transmission electron microscopy, and optical microscopy studies, we conclude that the alloy contains the disordered A2 and ordered D03 phases. Due to the D03 precipitation hardening effect, the yield strength (Y) of slowly-cooled Fe81Ga19 is about 950 MPa, much higher than that (about 500 MPa) of [100] single crystal Fe81Ga19. For the first time, both Young's modulus (E) and shear modulus (G) were measured vs. magnetic field (H) up to 3 kOe by the impulse excitation of vibration method successfully: the ΔE and ΔG effects. The magneto-mechanical (flexure) coupling factor (KE) of the alloy, estimated from the ΔE effect, is 11.7%, and the (torsion) coupling factor (KG), from the ΔG effect, is 19.1%. The damping capacity, estimated by considering the magneto-elastic hysteresis mechanism alone, is 0.0076 only. The experimentally found total damping capacity is about 0.01-0.03. The latter should be larger than the former, because there are additional micro- and macro-eddy-current contributions to the total damping capacity. © 2015 Elsevier B.V.

Chang S.-Y.,Graduate Institute of Management | Lu H.-P.,NTUST | Liang C.-J.,Graduate Institute of Finance
International Journal of Innovation Science | Year: 2013

The following teaching case study details an exciting and modern case of an integrated circuit distribution company in Taiwan (the Sunnic Group) as it transitions through several major innovation initiatives creating new products and a new role for itself in the industry while simultaneously fending off market forces, competition, and degrading profits. This case study delivers important lessons about conducting innovation via four major areas. The first area details how market forces, intense competitions, entry barriers, and corporate growth can create situations where innovating on a large scale has strong advantages over the alternatives. The second area shows how theories on innovation and customer value propositions are used to create realistic strategies for new products and feasible plans for organizational change. Topics like knowledge management, creating new capabilities, and key performance indicators are discussed. Next, the actual implementations of several innovation initiatives are explained in dramatic fashion with characters demonstrating resistance to innovation, competitor's reactions, and conflicts of interest; more importantly, it demonstrates how product development strategies can actually play out. This section also captures how transforming an organization can be stressful, leadership intensive, and difficult. Finally, the case reviews the results of the transformation and innovation efforts via the patent and financial results. This case is designed to teach students a mix of theory and practical skills. A lengthy list of questions for students is also provided and a teacher's edition from page 21 onwards of this text contains lecture notes that help in guiding class discussions and aid in creating assignments.

2015 IEEE International Conference on Consumer Electronics - Taiwan, ICCE-TW 2015 | Year: 2015

An upcoming Internet-of-Tings (IoT) and machine-to-machine (M2M) era will introduce new paradigms for designing smart-living technologies. According to Gartner's latest forecast, smart home will be the most potential field for IoT-enabled applications. Due to the increasing concern on maintaining a sustainable earth, energy savings should leverage IoT related advances for realizing next generation energy savings for a context-aware smart home, where a smart socket is one key enabler. However, most of the current smart sockets work in a standalone way and its configuration stays fixed over time. By incorporating the M2M related advancement, we implement an M2M-enabled and reconfigurable smart socket (hereafter referred to as m2mSocket) which can dynamically changes its configuration by flexibly connecting to remote smart machines to provide attentive services. This way, the system can better fulfill users' needs in a dynamic and IoT-enabled home environment. © 2015 IEEE.

Lin S.-C.,NTUST | Wang I.-H.,NTU
IEEE International Symposium on Information Theory - Proceedings | Year: 2015

When multiple users share the same resource for physical layer cooperation such as relay terminals in their vicinities, this shared resource may not be always available for every user, and it is critical for transmitting terminals to know whether other users have access to that common resource in order to better utilize it. Failing to learn this critical piece of information may cause severe issues in the design of such cooperative systems. In this paper, we address this problem by investigating a two-pair two-way relay channel with an intermittently available relay. In the model, each pair of users need to exchange their messages within their own pair via the shared relay. The shared relay, however, is only intermittently available for the users to access. The accessing activities of different pairs of users are governed by independent Bernoulli random processes. Our main contribution is the characterization of the capacity region to within a bounded gap in a symmetric setting, for both delayed and instantaneous state information at transmitters. An interesting observation is that the bottleneck for information flow is the quality of state information (delayed or instantaneous) available at the relay, not those at the end users. To the best of our knowledge, our work is the first result regarding how the shared intermittent relay should cooperate with multiple pairs of users in such a two-way cooperative network. © 2015 IEEE.

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