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排序方式: 共有254条查询结果,搜索用时 9 毫秒
71.
Marios C. Angelides Lissette Andrea Cabello Wilson Paola Liliana Burneo Echeverría 《Multimedia Tools and Applications》2018,77(20):26397-26448
Wearable technology comes with the promise of improving one’s lifestyles thru data mining of their physiological condition. The potential to generate a change in daily or routine habits thru these devices leaves little doubt. Whilst the hardware capabilities of wearables have evolved rapidly, software apps that interpret and present the physiological data and make recommendations in a simple, clear and meaningful way have not followed a similar pattern of evolution. Existing fitness apps provide routinely some information to the wearer by mining personal data but the subsequent analysis is limited to supporting ad hoc personal goals. The information and recommendations presented are often either not entirely relevant or incomplete and often not easy to interpret by the wearer. The primary motivation behind this research is to address this wearable technology software challenge by developing a middleware mobile app that is supported by data analytics and machine learning to assist with interpretation of wearer data and with making of personal lifestyle improvement recommendations on the go which may then be used to feedback to the wearer’s daily goals and activities. The secondary motivation is to correlate and compare with trends in the wearer’s peer community. 相似文献
72.
Lately, the online social media have revolutionized communications and consequently the marketing of tourism destinations and businesses. The area is rapidly evolving and the challenges and opportunities arising from it for tourism industry are already apparent. Electronic word-of-mouth (e-WOM) and online reviews/recommendations are increasingly used regarding tourism services that are high involvement services. The purpose of the present study is to develop a conceptual framework for understanding the foundations of digital communication and empirically investigate its validity by examining the factors influencing the tourism consumer behavior. This study adopts a conceptual model of e-WOM and explores the use of Twitter by the tourists. Findings revealed the factors affecting tourists’ decision-making and indicated that this social medium is not a panacea; it is another marketing channel to be wisely used in integrated communications marketing of tourism services. 相似文献
73.
Marios Iliopoulos Alex Maniatopoulos Theodore Antonakopoulos 《International Journal of Electronics》2013,100(3):271-285
IEEE 802.11 wireless LANs have a tremendous market potential, as they support high data rates, work in the world-wide licence free 2.4 GHz ISM band and have high performance in terms of range and power consumption. Hence, the development of a communication processor that supports the IEEE 802.11 MAC functions has a significant potential, making very important the concept of having an ASIC ‘right from the first time’, in order to minimize development cost and to meet short time-to-market requirements. This paper presents the methodology of developing such a component with emphasis on the rapid prototyping approach. The chip architecture, which is based on an ARM processor core, is described in detail, focusing on the implementation of the protocol functions using custom hardware modules. Finally, the paper presents experimental results on the ASIC implementation. 相似文献
74.
Achilleas Savva Marios Neophytou Charalambos Koutsides Kyriacos Kalli Stelios A. Choulis 《Organic Electronics》2013,14(11):3123-3130
Solution based inverted Organic Photovoltaic (OPVs) usually use Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) derivatives combined with pristine processing additives as hole selective contact on top of the hydrophobic conjugated polymer:fullerene active layer. In this study, PEDOT:PSS based hole selective contact is treated with two different boiling point additives, 2,5,8,11-tetramethyl-6-dodecyn-5,8-diol ethoxylate (Dynol) and Zonyl FS-300 fluorosurfactant (Zonyl). Although corresponding inverted OPVs using the above PEDOT:PSS:Additives show similar power conversion efficiency (PCE) values, the mechanisms of their implementation on inverted OPV operation are not identical. By understanding the synergistic effects of PEDOT:PSS processing additives on the hole selectivity of inverted OPVs we demonstrate a novel combination of PEDOT:PSS additives mixture as an effective route to further increase the hole selectivity, reliability andpower conversion efficiency of inverted OPVs. 相似文献
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Marios D. Demetriou Aaron Wiest Douglas C. Hofmann William L. Johnson Bo Han Nikolaj Wolfson Gongyao Wang Peter K. Liaw 《JOM Journal of the Minerals, Metals and Materials Society》2010,62(2):83-91
Owing to a unique atomic structure lacking microstructural defects, glassy metals demonstrate certain universal properties
that are attractive for load-bearing biomedical-implant applications. These include a superb strength, which gives rise to
very high hardness and a potential for minimizing wear and associated adverse biological reactions, and a relatively low modulus,
which enables high elasticity and holds a promise for mitigating stress shielding. There are, however, other non-universal
properties specific to particular amorphous metal alloys that are inferior to presently used biometals and may be below acceptable
limits for hard-tissue prosthesis. In this article, features of the performance of amorphous metals relevant to hard-tissue
prosthesis are surveyed and contrasted to those of the current state of the art, and guidelines for development of new biocompatible
amorphous metal alloys suitable for hard-tissue prosthesis are proposed. 相似文献
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79.
Analytical expressions for the time invariant, average mass transfer coefficient and the concentration boundary layer thickness applicable to dissolving single-component nonaqueous phase liquid (NAPL) pools in two-dimensional, saturated, homogeneous and isotropic porous formations are derived. Good agreement between predicted and experimentally determined time invariant average mass transfer coefficients is observed. 相似文献
80.
Dithiopheneindenofluorene (TIF) Semiconducting Polymers with Very High Mobility in Field‐Effect Transistors 下载免费PDF全文
Hu Chen Michael Hurhangee Mark Nikolka Weimin Zhang Mindaugas Kirkus Marios Neophytou Samuel J. Cryer David Harkin Pascal Hayoz Mojtaba Abdi‐Jalebi Christopher R. McNeill Henning Sirringhaus Iain McCulloch 《Advanced materials (Deerfield Beach, Fla.)》2017,29(36)
The charge‐carrier mobility of organic semiconducting polymers is known to be enhanced when the energetic disorder of the polymer is minimized. Fused, planar aromatic ring structures contribute to reducing the polymer conformational disorder, as demonstrated by polymers containing the indacenodithiophene ( IDT ) repeat unit, which have both a low Urbach energy and a high mobility in thin‐film‐transistor (TFT) devices. Expanding on this design motif, copolymers containing the dithiopheneindenofluorene repeat unit are synthesized, which extends the fused aromatic structure with two additional phenyl rings, further rigidifying the polymer backbone. A range of copolymers are prepared and their electrical properties and thin‐film morphology evaluated, with the co ‐benzothiadiazole polymer having a twofold increase in hole mobility when compared to the IDT analog, reaching values of almost 3 cm2 V?1 s?1 in bottom‐gate top‐contact organic field‐effect transistors. 相似文献