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We use both TFDEA and Regression to forecast the diffusion of battery electric cars. Our methodology was divided into 6 steps. The objective of this project is to compare and discuss the results of TFDEA and Regression to be used to predict the model year of Battery Electric Vehicle. For project scope, the dataset of BEV will only focus on the BEV sold or available in US market from 1997∼2015. The...
As the recognition of public transport system as a service is growing, the importance of customer satisfaction through enhancing customer experience has drawn more attention. Safety and comfort are mentioned as important aspects of public transport user experience. It is believed that customers' experience is influenced by affective factors experienced through contacts with organisations, such as...
The effect of varying plasma etching process time on alkaline textured mono-crystalline silicon has been investigated and applied for industrial process. Reduced surface reflectance is observed for longer plasma etching process time, with the tradeoff having lower effective carrier lifetime induced by plasma damage. The degradation is further caused by the mismatch of the surface morphology and ionic...
650V superjunction IGBTs have been fabricated. Depending on IGBT structures as well as process conditions, competitive trade-off performances have been observed. Vcesat of 1.4V and tf around 35 ns at the collector current density of 250A/cm2 were obtained with the prototype of superjunction FS IGBT. The superjunction NPT IGBT also shows tf of 35ns with Vcesat of 1.9V, which is superior to the conventional...
65% of the world's population lives in countries where overweight and obesity kills more people than those who are underweight. Healthcare organizations, private corporations and individuals are investing in proactive health and weight management. Advances in sensor technologies have enabled development of affordable wearable technology devices, the most rapid expansion being fitness trackers which...
Over the course of a decade, the Bonneville Power Administration's Technology Innovation Office has developed a roadmapping approach that captures business challenges and opportunities critical to the agency, links these with barriers to success, and connects these with technical solutions and research questions. Senior leaders from across the agency establish strategic goals and objectives, and international...
Trench gate field stop (FS) IGBT is widely used in various power applications owing to its low conduction and switching losses. However, the trench gate FS-IGBT induces the high saturation current due to its high cell density so that it deteriorates the short circuit ruggedness, which is essential for the power applications such as welding machines and motor controls. In this paper, a 600V trench...
Diffraction-unlimited semiconductor nanolasers are demonstrated by using single shape-controlled InGaN/GaN core-shell nanorods as laser gain media on Ag films epitaxially grown on Si substrates. The use of atomically smooth Ag films allows us to fabricate low-loss plasmonic cavities for ultralow-threshold, continuous-wave (CW) nanolaser operation above liquid nitrogen temperature. Furthermore, the...
Miniaturization of semiconductor lasers holds the key to the development of compact, low-threshold, and fast coherent on-chip light sources/amplifiers, which are critically important for emerging applications in nanophotonics, integrated optics, and information technology (1–3). However, on-chip integration of nanoscale electronic components with conventional semiconductor lasers utilizing dielectric...
This study presents a formal comparison of TFDEA with regression model to forecast wireless communication technology. In addition to the data set from the former research, up-to-2011 4G network technologies are added and analyzed. The research was designed to set the point of forecasting in 2001 so that technologies between 2001 and 2011 are to be forecasted using data set between 1979 and 2001. The...
U.S. academic research institutions spent public and private funds of 54 billion dollars solely in 2009. This is a significant investment considering recent harsh economic downturn. While there exists public acknowledgement of importance of unremitting investment on research and development, U.S. research institutions still struggle to validate their performance and get reliable support from public...
Successful development of epitaxial Ag as a new plasmonic platform has enabled low-threshold, continuous-wave (CW) operation of a SPASER-enabled nanolaser comprised of a subdiffraction plasmonic cavity and a single InGaN@GaN core-shell nanorod gain medium.
The code dissemination in sensor networks is a useful technology to update a new code or change the functionality or bugs of the existing code. However, sensor networks are susceptible to various attacks because they are deployed in open and unprotected environments. It is necessary to use effective mechanisms to protect sensor nodes against attacks. In this paper, we propose a secure code dissemination...
Performance evolution of universities' licensing practice has been a favorable interest in literature. However, the existing studies implicitly or explicitly states their limitation of ignoring time-lag effects of the licensing variables such as expenditure, patents, start-up licensing income. A statistics process detecting time-lag coefficients of licensing variables of U.S. research institutions...
This study evaluates efficiencies and their changes of technology licensing practices of 46 U.S. research institutions using licensing data of the association of university technology manager (AUTM) survey from 1991 to 2007. Data envelopment analysis and Malmquist Index are well-known methods evaluating relative performance of service organizations where widely recognized standard evaluation structures...
Time-series analysis in Econometrics provides advanced methods identifying relationship among time-seriesed subjects which have been rarely applied to engineering management field. While sophisticated econometrics methods such as distributed lag model with unrestricted lag, arithmetic lag, polynomial lag and geometric lag structure, and dynamics model theories enrich analysis of economic data consisting...
Code Dissemination of a sensor network is useful for uploading a new code or for changing the functionality of the existing code. Code Dissemination may be done multiple times during a node's lifetime and therefore a node has to remain receptive to future code updates. The majority of code dissemination mechanisms are based on Deluge. Deluge generates broadcast storm to distribute a new code, which...
In this work we evaluate the implied open circuit voltages (iVoc) at various stages of production of laser doped selective emitter (LDSE) solar cells using photoluminescence (PL) imaging The change of the iVoc values after the laser doping (LD) has shown that this process has minimal effect on cell performance. It is also found that the order of processes such as edge junction isolation and silicon...
This paper provides a comprehensive review of literature on university technology transfer. The success of nations depends on how efficient research can be translated into commercial products. Universities play a key role in this. There are two major areas that need to be understood to build an efficient technology transfer mechanisms. First are the characteristics of each university. The literature...
WiBro is defined as a subset of the IEEE 802.16 standard and is developed based on the mobile WiMAX. WiBro delivers wireless data with a high transfer rate to provide mobile broadband services. However, it is necessary to consider radio resources efficiency due to limited resources. In this paper, we propose frequency assignment (FA) load balancing algorithm in order to use resources efficiently,...
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