Browsing Scopus İndeksli Yayınlar Koleksiyonu by Author "Öğrenci, Arif Selçuk"
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Anomaly detection in walking trajectory [Yürüyüş yörüngesinde anormallik algılama]
Öğrenci, Arif Selçuk (Institute of Electrical and Electronics Engineers Inc., 2018)Analysis of the walking trajectory and the detection of anomalies in this trajectory provide important benefits in the fields of health and security. In this work two methods to detect anomalies in trajectories are compared. ... -
Beacons for Indoor Positioning
Cay, Elif; Mert, Yeliz; Bahcetepe, Ali; Akyazi, Bugra Kagan; Öğrenci, Arif Selçuk (IEEE, 2017)This work aims to develop a system for the tracking and control of elderly or handicapped people in an indoor environment. We have developed both a special box using an Arduino board and a mobile application on Android to ... -
Channel estimation for visible light communications using neural networks
Yeşilkaya, Anıl; Karatalay, Onur; Öğrenci, Arif Selçuk; Panayırcı, Erdal (Institute of Electrical and Electronics Engineers Inc., 2016)Visible light communications (VLC) is an emerging field in technology and research. Estimating the channel taps is a major requirement for designing reliable communication systems. Due to the nonlinear characteristics of ... -
Complex event post processing for traffic accidents
Öğrenci, Arif Selçuk (IEEE, 2012)In this paper we describe a framework for an expert system that tries to predict effects of an accident based on past data using supervised learning employing artificial neural networks. For this purpose sensory data events ... -
Empirical results about efforts for effective teaching to y-generation freshman students
Öğrenci, Arif Selçuk (IEEE, 2012)New techniques are deployed to teach the new generation of students effectively. This work tries to share our experience in a blended course for over eleven years. It has been observed that the online portion of the course ... -
Epidemic models for phase transitions: application to a physical gel
Bilge, Ayşe Hümeyra; Pekcan, Önder; Kara, Selim; Öğrenci, Arif Selçuk (Taylor & Francis Ltd, 2017)Carrageenan gels are characterized by reversible sol-gel and gel-sol transitions under cooling and heating processes and these transitions are approximated by generalized logistic growth curves. We express the transitions ... -
Fault-tolerant training of neural networks in the presence of MOS transistor mismatches
Öğrenci, Arif Selçuk; Dündar, Günhan; Balkır, Sina (IEEE-INST Electrical Electronics Engineers Inc, 2001)Analog techniques are desirable for hardware implementation of neural networks due to their numerous advantages such as small size low power and high speed. However these advantages are often offset by the difficulty in ... -
Fuzzy logic for decision extraction from product reviews
Altabbaa, Mhd Tahssin; Ayabakan, Tarik; Öğrenci, Arif Selçuk (Institute of Electrical and Electronics Engineers Inc., 2018)Most of manufacturers and merchants sell their products via internet websites where customers buy them and write their reviews regarding the purchased product. These reviews carry a lot of information. Prospective customers ... -
Mathematical Characterization of Thermo-reversible Phase Transitions of Agarose Gels
Öğrenci, Arif Selçuk; Pekcan, Önder; Kara, Selim; Bilge, Ayşe Hümeyra (Taylor & Francis Inc, 2018)The thermal phase transition temperatures of high (HMP) and low melting point (LMP) agarose gels were investigated by using UV-vis spectroscopy techniques. Transmitted light intensities from the gel samples with different ... -
Mathematical models for phase transitions in biogels
Bilge, Ayşe Hümeyra; Öğrenci, Arif Selçuk; Pekcan, Önder (World Scientific Publ Co Pte Ltd, 2019)It has been shown that reversible and irreversible phase transitions of biogels can be represented by epidemic models. The irreversible chemical sol-gel transitions are modeled by the Susceptible-Exposed-Infected-Removed ... -
An open software architecture of neural networks: Neurosoft
Software architecture of generic distributed neural networks and its relevant information model have been developed. Principles of on-line architecture building training controlling (managing) and topological optimization ... -
Parameter quantization effects in Gaussian potential function neural networks
Karakuş, Erkan; Öğrenci, Arif Selçuk; Dündar, Günhan (World Scientific and Engineering Academy and Society, 2001)In hardware implementations of Gaussian Potential Function Neural Networks (GPFNN) deviation from ideal network parameters is inevitable because of the techniques used for parameter storage and implementation of the functions ... -
Sickle Cell Anemia Detection
Albayrak, Batuhan; Darıcı, Muazzez Buket; Kiracı, Furkan; Öğrenci, Arif Selçuk; Özmen, Atilla; Ertez, Kerem (IEEE, 2018)Anemia is a common name given to falls in oxygen transport capacity due to some of the functional disadvantages of red blood cells. Pathology Laboratorians put the tissue on the microscope glass and try to diagnose Anemia ... -
Sparse Channel Estimation for Space-Time Block Coded OFDM-Based Underwater Acoustic Channels
Altabbaa, Mhd Tahssin; Öğrenci, Arif Selçuk; Panayırcı, Erdal; Poor, H. Vincent (Institute of Electrical and Electronics Engineers Inc., 2018)Communication over acoustic signals underwater results in multi-scale multi-lag channels due to multipath propagation. Hence a robust channel estimation technique has to be present at the receiver. In this paper assuming ... -
A systems software architecture for training neural fuzzy neural and genetic computational intelligent networks
Arsan, Taner; Öğrenci, Arif Selçuk; Saydam, Tuncay (IEEE, 2006)A systems software architecture for training distributed neural fuzzy neural and genetic networks and their relevant information models have been developed. Principles of on-line architecture building training managing and ... -
Transmitter source location estimation using crowd data
Öğrenci, Arif Selçuk; Arsan, Taner (Pergamon-Elsevier Science Ltd, 2018)The problem of transmitter source localization in a dense urban area has been investigated where a supervised learning approach utilizing neural networks has been adopted. The cellular phone network cells and signals have ... -
Unsupervised Anomaly Detection in Multivariate Spatio-Temporal Data Using Deep Learning: Early Detection of COVID-19 Outbreak in Italy
Karadayı, Yıldız; Aydın, Mehmet Nafiz; Öğrenci, Arif Selçuk (Ieee-Inst Electrıcal Electronıcs Engıneers Inc, 2020)Unsupervised anomaly detection for spatio-temporal data has extensive use in a wide variety of applications such as earth science, traffic monitoring, fraud and disease outbreak detection. Most real-world time series data ... -
VLSI implementation of GRBF (Gaussian Radial Basis Function) networks
Çevikbaş, I. Can; Öğrenci, Arif Selçuk; Dündar, Günhan; Balkır, Sina (IEEE, 2000)A GRBF network is designed for VLSI implementation. Building blocks of the network consist mainly of analog circuits: op-amp multiplier multiplying DAC (digital to analog converter) floating resistor summer and exponentiator. ... -
Weight Exchange in Distributed Learning
Dorner, Julian; Favrichon, Samuel; Öğrenci, Arif Selçuk (IEEE, 2016)Neural networks may allow different organisations to extract knowledge from the data they collect about a similar problem domain. Moreover learning algorithms usually benefit from being able to use more training instances. ... -
Why do students prefer search engines over academic databases
Öğrenci, Arif Selçuk (IEEE Computer Society, 2013)Students' preference of search engines in online information retrieval has been a problem for several reasons. This work tries to share our experience about the reasons why they do not utilize academic databases. Past ...