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73 documents, page 1 of 8

Controlling germanium CMP selectivity through slurry mediation by surface active agents

Karagöz, A.; Başım, Gül Bahar (2015)
Projects: EC | NANO-PROX (256348)
Due to copyright restrictions, the access to the full text of this article is only available via subscription. New developments and device performance requirements in microelectronics industry add to the challenges in chemical mechanical planarization (CMP) process. One of the recently introduced materials to semiconductor manufacturing is germanium which enables improved device performance through better channel mobility in shallow trench isolation (STI) applications for advanced circuits...

Developmental changes in natural viewing behavior bottom-up and top-down differences between children, young adults

Açık, Alper; Sarwary, A.; Schultze-Kraft, R.; Onat, S.; König, P. (2010)
Projects: EC | SF (217148)
Despite the growing interest in fixation selection under natural conditions, there is a major gap in the literature concerning its developmental aspects. Early in life, bottom-up processes, such as local image feature – color, luminance contrast etc. – guided viewing, might be prominent but later overshadowed by more top-down processing. Moreover, with decline in visual functioning in old age, bottom-up processing is known to suffer. Here we recorded eye movements of 7- to 9-year-old children...

Generalized LED index modulation optical OFDM for MIMO visible light communications systems

Başar, E.; Panayirci, E.; Uysal, Murat; Haas, H. (2016)
In this paper, we propose a generalized light emitting diode (LED) index modulation scheme for multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) visible light communications (VLC) systems. The proposed scheme generalizes the LED index modulation concept by using the spatial multiplexing principle to transmit complex OFDM signals through VLC channels by separating these signals into their real-imaginary and positive-negative parts. The maximum a posteriori (...

Data stream analytics and mining in the cloud

Arı, İsmail; Ölmezoğulları, E.; Çelebi, Ö. F. (2012)
Projects: EC | BI4MASSES (256537)
Due to copyright restrictions, the access to the full text of this article is only available via subscription. Due to prevalent use of sensors and network monitoring tools, big volumes of data or “big data” today traverse the enterprise data processing pipelines in a streaming fashion. While some companies prefer to deploy their data processing infrastructures and services as private clouds, others completely outsource these services to public clouds. In either case, attempting to store th...

Improving selectivity on germanium CMP applications

Karagöz, A.; Başım, Gül Bahar (2014)
Projects: EC | NANO-PROX (256348)
Due to copyright restrictions, the access to the full text of this article is only available via subscription. In the presented paper, the adsorption characteristics of cationic and anionic surfactants on germanium and silica were studied in order to improve selectivity in germanium based shallow trench isolation chemical mechanical planarization applications. It was observed that the very strong or loose self-assembled surfactant structures can help obtain selectivity on the silica/german...

Online association rule mining over fast data

Ölmezoğulları, E.; Arı, İsmail (2013)
Projects: EC | BI4MASSES (256537)
Due to copyright restrictions, the access to the full text of this article is only available via subscription. To extract useful and actionable information in real-time, the information technology (IT) world is coping with big data problems today. In this paper, we present implementation details and performance results of ReCEPtor, our system for "online" Association Rule Mining (ARM) over big and fast data streams. Specifically, we added Apriori and two different FP-Growth algorithms insi...

Use of line spectral frequencies for emotion recognition from speech

Bozkurt, E.; Erzin, E.; Eroğlu Erdem, Ç.; Erdem, Tanju (2010)
We propose the use of the line spectral frequency (LSF) features for emotion recognition from speech, which have not been been previously employed for emotion recognition to the best of our knowledge. Spectral features such as mel-scaled cepstral coefficients have already been successfully used for the parameterization of speech signals for emotion recognition. The LSF features also offer a spectral representation for speech, moreover they carry intrinsic information on the formant structure ...

Discrete-dipole approximation with surface interaction: computational toolbox for MATLAB

Loke, Vincent L. Y.; Mengüç, M. Pınar; Nieminen, T. A. (2011)
Projects: EC | NF-RAD (239382)
Due to copyright restrictions, the access to the full text of this article is only available via subscription. We describe a MATLAB toolbox that utilizes the discrete-dipole approximation (DDA) method for modelling light interaction with arbitrarily-shape scatterers in free space as well with planar surface interaction (DDA-SI). The range of applicable models range from optical micromanipulation, plamonics, nano-antennae, near-field coupling and general light interaction with scatterers ra...

Standards for indoor optical wireless communications

Boucouvalas, A. C.; Chatzimisios, P.; Ghassemlooy, Z.; Uysal, Murat; Yiannopoulos, K. (2015)
Due to copyright restrictions, the access to the full text of this article is only available via subscription. The application of Optical Wireless Communications (OWC) has grown in recent years that the whole industry would benefit from common standards to which competitive products comply. Standards are essential, particularly when the market expands into high-volume products like home appliances and other consumer goods. This article offers a timely review of standards-writing activity, ...

Learning to grasp with parental scaffolding

Ugur, E.; Celikkanat, H.; Şahin, E.; Nagai, Y.; Öztop, Erhan (2011)
Due to copyright restrictions, the access to the full text of this article is only available via subscription. Parental scaffolding is an important mechanism utilized by infants during their development. Infants, for example, pay stronger attention to the features of objects highlighted by parents and learn the way of manipulating an object while being supported by parents. In this paper, a robot with the basic ability of reaching for an object, closing fingers and lifting its hand lacks k...