103,198 research outputs found
Hydraulic design of a regenerative flow pump for an artificial heart pump
No full textThe present study is focused on the design of a regenerative flow pump for artificial heart pump application and the experimental testing and results. It is based on the improved momentum exchange theory proposed by Yoo et al. [1]. Salient feature of the present design procedure is that it does not require any re-adjustment of the input data. Using the design procedure, a regenerative flow type blood pump has been designed and manufactured to confirm its validity
Bismuth doped fiber laser performance on effective fiber cooling
No full textIn the past, bismuth doped fiber (BiDF) lasers, operating in the 1160-1300 nm wavelength range, have gained much attention as they are promising for many applications; including medical and astronomy. However, the poor lasing efficiency of BiDF laser, compared to the widely used rare-earth doped fiber lasers, requires further investigations. One possible reason that can impair the BiDF laser efficiency is the presence of high unsaturable loss in the fiber, which is temperature dependent. Thus, temperature rise in the BiDF under strong pumping can be a limiting factor for such laser systems. Here, we report the dependence of BiDF laser efficiency on effective cooling of the fiber
Bismuth doped fibres for near-infrared light sources: progress and prospects
No full textThe luminescence properties of Bi-doped silica fibres in the near-infrared region are discussed. Bi-doped fibre lasers and amplifiers and their dependence on the unsaturable loss and excited state absorption are also discussed
An Approach to Eliminate Ambiguity of Blind ML Detection for Orthogonal Space-Time Block Codes
No full textVan-Su Pham, Minh-Tuan Le, Mai Linh, S. M. Humayun Kabir, Giwan Yoo
The liminality of trajectory shifts in institutional entrepreneurship
No full textIn this paper, we develop a process model of trajectory shifts in institutional entrepreneurship. We focus on the liminal periods experienced by institutional entrepreneurs when they, unlike the rest of the organization, recognize limits in the present and seek to shift a familiar past into an unfamiliar and uncertain future. Such periods involve a situation where the new possible future, not yet fully formed, exists side-by-side with established innovation trajectories. Trajectory shifts are moments of truth for institutional entrepreneurs, but little is known about the underlying mechanisms of how entrepreneurs reflectively deal with liminality to conceive and bring forth new innovation trajectories. Our in-depth case study research at CarCorp traces three such mechanisms (reflective dissension, imaginative projection, and eliminatory exploration) and builds the basis for understanding the liminality of trajectory shifts. The paper offers theoretical implications for the institutional entrepreneurship literature
Porcine plasma ficolin binds and reduces infectivity of porcine reproductive and respiratory syndrome virus (PRRSV) in vitro
No full textNatalie D. Keirstead, Changhee Lee, Dongwan Yoo, Andrew S. Brooks, M. Anthony Haye
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Ytterbium doped nano-crystalline optical fiber for reduced photodarkening
No full textWe report suppression of photodarkening in Yb-doped nano-crystalline fibers in silica host. The photodarkening induced loss reduced by 20 times compared to Yb-doped aluminosilicate fibers. The laser efficiency of the nano-crystalline fiber was 79%
A 40fJ/c-s 1 V 10 bit SAR ADC with Dual Sampling Capacitive DAC Topology
No full textA 40 fJ/c-s, 1 V, 10-bit SAR ADC is presented for energy constrained wearable body sensor network application. The proposed 10-bit dual sampling capacitive DAC topology reduces switching energy by 62% compared with 10-bit conventional SAR ADC. Also, it is more robust to capacitor mismatch than the conventional architecture due to its cancelling effect of each capacitive DAC. The proposed SAR ADC is fabricated in 0.18 mu m 1P6M CMOS technology and occupies 1.17 mm(2) including pads. It dissipates only 1.1 mu W with 1 V supply voltage while operating at 100 kS/s.N
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