| 11. |
- Ali, Rashid, et al.
(author)
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Social Networking sites for Interdisciplinary Learning at Workplace : Work integrated informal Learning (WiiL)
- 2016
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In: International Conference on Advanced Computing, Communication and Information Sciences (ICACCI-2016). - : Pushpa Publishing House. ; , s. 9-9
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Conference paper (peer-reviewed)abstract
- Work Integrated Learning (WIL) studies usually focuses on educational situations when professional organizations are actively involved in learning processes for students in higher education. However, after completing the institutional period entering the professional arena, the professional person is still actually a student at the workplace as s/he never stops learning. Learning within the organization is not only linked to the formal training and education of the employees, but also to informal processes of sharing knowledge. The knowledge is often embedded in organizational activities, practices and norms, as well as in social ties among individuals in the organization. Our analysis of employees' behavior and acceptance of online social networking as an information system (IS) of learning is performed by a descriptive case survey within a telecom corporation in Pakistan. Thepurpose of our study is to bring an informal learning system at workplace. In this study we quantitative data isobtained from 105 out of 180 targeted employees. The results show that a majority of the studied employees favors social networking to connect colleagues at different levels and more than half of the respondents share their knowledge and experiences using social sites. Nearly half of the respondents strongly agree that knowledge sharing is an important role of social sites within the organization and many are in favor of social media as an informal learning system. The results also show how the professionals use social networking sites to share their experiences and to build a virtual break in hierarchical levels of professions. This paper illustrates the benefits of social networking sites as an informal work integrated learning tool that also serves as an IS model for the organization.
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| 12. |
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| 13. |
- Yang, Yanpeng, 1987-, et al.
(author)
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Cooperative transmissions in ultra-dense networks under a bounded dual-slope path loss model
- 2017
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In: 2017 European Conference on Networks and Communications (EuCNC). - : Institute of Electrical and Electronics Engineers (IEEE). - 9781538638736
-
Conference paper (peer-reviewed)abstract
- In an ultra-dense network (UDN) where there are more base stations (BSs) than active users, it is possible that many BSs are instantaneously left idle. Thus, how to utilize these dormant BSs by means of cooperative transmission is an interesting question. In this paper, we investigate the performance of a UDN with two types of cooperation schemes: Non-coherent joint transmission (JT) without channel state information (CSI) and coherent JT with full CSI knowledge. We consider a bounded dual-slope path loss model to describe UDN environments where a user has several BSs in the near-field and the rest in the far-field. Numerical results show that non-coherent JT cannot improve the user spectral efficiency (SE) due to the simultaneous increment in signal and interference powers. For coherent JT, the achievable SE gain depends on the range of near-field, the relative densities of BSs and users, and the CSI accuracy. Finally, we assess the energy efficiency (EE) of cooperation in UDN. Despite costing extra energy consumption, cooperation can still improve EE under certain conditions.
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| 14. |
- Hwang, YoungJu, et al.
(author)
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On the throughput gain of device-to-device communications
- 2015
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In: ICT Express. - : Elsevier. - 2405-9595. ; 1:2, s. 67-70
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Journal article (peer-reviewed)abstract
- In an uplink underlaid device-to-device (D2D) cellular network, this paper considers its two aspects of throughput improvement. The two-fold gain comprises the throughput increase by offloading downlink cellular traffic to D2D communications, duplexing gain, and the increase by reusing uplink resources of D2D transmissions, capacity gain. Both impacts are investigated by exploiting stochastic geometry. On the basis of the analysis, a throughput optimal D2D operation guideline is provided for different network congestion environments.
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| 15. |
- Kim, Donggu, et al.
(author)
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Cooperation Strategies for Partly Wireless C-RAN
- 2018
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In: IEEE Communications Letters. - : IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. - 1089-7798 .- 1558-2558. ; 22:6, s. 1248-1251
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Journal article (peer-reviewed)abstract
- This letter presents a variant of cloud radio access network (C-RAN) architecture, which we term partly wireless C-RAN (PW-CRAN). It is characterized by extra radio nodes connected through the existing remote radio heads. Because of the newly connected nodes and the consequent additional delay, the operation of PW-CRAN requires different approaches compared with that of the typical C-RAN. Specifically, the effect of delayed channel state information on the suitability of network cooperation should be identified. To tackle this problem, we introduce two representative cooperation strategies and evaluate the performance with regard to the delay via simulations. Numerical results suggest that it is better to exclude the extra nodes from cooperation if they incur excess delay. Furthermore, whether the delay is deemed excessive depends on the interference environment. Hence, we provide quantified guidelines on the cooperation strategy of PW-CRAN.
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| 16. |
- Won Lee, Sung, et al.
(author)
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Thin Ion-Gel Dielectric Layer to Enhance the Stability of Polymer Transistors
- 2015
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In: Science of Advanced Materials. - : AMER SCIENTIFIC PUBLISHERS. - 1947-2935 .- 1947-2943. ; 7:5, s. 874-880
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Journal article (peer-reviewed)abstract
- Poly(3-hexylthiophene)(P3HT) transistors with a thin ion-gel gate dielectric layer (100 nm thickness) was fabricated. The thin ion-gel dielectric layer retarded the capacitance drop at high frequencies and the diffusion of the ionic molecules in the polymer active layer that are severe drawbacks of the ion-gel dielectric transistors. Thereby, the thin ion-gel transistors showed hysteresis-free I-V characteristics, less frequency-dependence, and enhanced bias-stability. The average charge mobility was similar to 2 cm(2)/Vs and the on/off ratio was 10(4)similar to 10(5). The dependence of the capacitance and the kinetics of ion translation on the thickness of the ion-gel were discussed by both experiments and theoretical calculations.
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