Atakan, Barış
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Atakan, Baris
Atakan, B
Atakan, B.
Atakan, B
Atakan, B.
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Email Address
barisatakan@iyte.edu.tr
Main Affiliation
03.05. Department of Electrical and Electronics Engineering
Status
Current Staff
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WoS Researcher ID
Sustainable Development Goals
1NO POVERTY
0
Research Products
2ZERO HUNGER
0
Research Products
3GOOD HEALTH AND WELL-BEING
0
Research Products
4QUALITY EDUCATION
1
Research Products
5GENDER EQUALITY
0
Research Products
6CLEAN WATER AND SANITATION
0
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7AFFORDABLE AND CLEAN ENERGY
5
Research Products
8DECENT WORK AND ECONOMIC GROWTH
1
Research Products
9INDUSTRY, INNOVATION AND INFRASTRUCTURE
6
Research Products
10REDUCED INEQUALITIES
0
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11SUSTAINABLE CITIES AND COMMUNITIES
0
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12RESPONSIBLE CONSUMPTION AND PRODUCTION
1
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13CLIMATE ACTION
1
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14LIFE BELOW WATER
0
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15LIFE ON LAND
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16PEACE, JUSTICE AND STRONG INSTITUTIONS
0
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17PARTNERSHIPS FOR THE GOALS
0
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Documents
37
Citations
1308
h-index
15
Documents
17
Citations
620
Scholarly Output
26
Articles
15
Views / Downloads
33099/8094
Supervised MSc Theses
5
Supervised PhD Theses
2
WoS Citation Count
103
Scopus Citation Count
182
Patents
0
Projects
6
WoS Citations per Publication
3.96
Scopus Citations per Publication
7.00
Open Access Source
22
Supervised Theses
7
| Journal | Count |
|---|---|
| Nano Communication Networks | 3 |
| Wireless Personal Communications | 3 |
| IEEE Transactions on Molecular, Biological, and Multi-Scale Communications | 2 |
| IEEE Communications Letters | 1 |
| IEEE Transactions on Communications | 1 |
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25 results
Scholarly Output Search Results
Now showing 1 - 10 of 25
Article Citation - WoS: 3Citation - Scopus: 4On Exploiting Sampling Jitter in Vehicular Sensor Networks(Institute of Electrical and Electronics Engineers Inc., 2014) Atakan, BarışVehicular sensor networks (VSNs) are composed of vehicular sensor nodes that collaboratively sample, communicate, and reconstruct the event signal at the sink node. Samples of event signals are subjected to jitter based on the propagation speed of signal and locations of vehicular sensors. In this paper, a theoretical analysis is presented to understand the effects and how to exploit the jitter in the sensed event signal for energy-efficient and reliable communication in VSNs. Results reveal that sampling jitter can be advantageous and can be exploited in developing adaptive communication techniques, which can provide significant energy conservation while maintaining reliability in VSNs.Master Thesis Event Distortion Based Clustering Algorithm for Energy Harvesting Wireless Sensor Networks(Izmir Institute of Technology, 2017) Al-Qamaji, Ali Mudheher Raghib Kafi; Atakan, Barış; Atakan, BarışWireless Sensor Network (WSN) is a set of inexpensive densely deployed wireless sensor nodes with limited functionalities and scarcity in energies, whose observations are forwarded or relayed by intermediate nodes to the Base Station (BS). In the networks with densely deployed nodes, the observations are likely to be highly correlated in the space domain. This type of correlation is referred as spatial correlation, which produces unfavorable redundant readings causing energy wasting. In this thesis, the main task is to reduce these nodes that have redundant readings by using a clustering algorithm called Event Based Clustering (EDC) algorithm. The clustering algorithm is based on exploiting the spatial correlation that is used to cluster the sensor nodes. Exploiting spatial correlation is proposed by using Vector Quantization (VQ) with respect to the distortion constraints. Furthermore, this algorithm is applied for energy harvesting sensor nodes. Also, the inessential sensor nodes that have correlated readings are reduced for improving the Energy-Efficacy (EE) with acceptable level of event signal reconstruction distortion at the sink node. After applying the EDC algorithm, the communication model is changed from single-hop model to two-hop (clustered-network) model. Hence, a theoretical framework of distortion function, i.e., accuracy level, for both single-hop and two-hop communication models is derived. Then, single-hop and two-hop communication models are compared in terms of achieved distortion level, number of alive nodes, and energy consumption for different sizes of event area. Finally, the effects of various harvested energy level on the clustered-network is studied with respect to the same terms.Article Citation - WoS: 4Citation - Scopus: 5Effects of Framing Errors on the Performance of Molecular Communications With Memory(Institute of Electrical and Electronics Engineers Inc., 2020) Atakan, Barış; Galmes, SebastiaIn conventional digital communication systems, synchronous transmission is achieved by embedding the clocking information into the data signal. However, the implementation of this technique in molecular communication systems, which rely on the diffusion of molecules as information carriers, becomes very complex due to the randomness of the diffusion process. Hence, in this paper we consider the molecular communication between two nanoscale devices with no exchange of any clock signal. To initiate the communication, the transmitter sends a special molecular symbol called beacon in order to trigger the detection process in the receiver. Therefore, this beacon symbol is equivalent to the start bit used for framing in asynchronous serial communication systems. We assume that both transmitter and receiver clocks are perfect, but not synchronized. Accordingly, the analysis focuses on the effects of framing errors on the performance of the molecular channel, measured via the symbol error probability. These errors are inherent to the random nature of the beacon arrival instant, which tends to degrade the alignment between the transmitter and receiver frames. We also assume a molecular channel with any level of inter-symbol interference and the use of different types of molecules to encode information symbols. We validate the derived SEP expression by means of extensive simulation experiments, and finally we develop a design scheme for the beacon symbol that satisfactorily mitigates the effects of framing errors.Doctoral Thesis Modeling and Analysis of Molecular Signals in Multiscale Molecular Communication(01. Izmir Institute of Technology, 2021) Güleç, Fatih; Atakan, BarışThis thesis focuses on modeling, analysis, and novel experimental techniques in molecular communication (MC). The objective of this thesis is to develop novel engineering solutions and modeling approaches to enable MC applications. The first part of the thesis is about microscale MC studies. In this part, a model of how a receiver nanomachine measures and reconstructs a molecular signal is proposed with a probabilistic approach. In the second part, macroscale MC studies with active transmitters are given. An experimental setup which includes a sprayer emitting alcohol molecules as a transmitter and an alcohol sensor as the receiver is employed. Using the data collected by this setup, five statistical methods, a feature extraction algorithm and the fluid dynamics-based distance estimation algorithm are proposed for distance estimation. Furthermore, a novel droplet-based signal reconstruction approach to channel modeling is proposed. Moreover, MC is utilized to propose an end-to-end system model which considers pathogen-laden cough/sneeze droplets as the input and the infection state of the human as the output. In addition, the concept of mobile human ad hoc network which exploits the similarity of airborne transmission-driven human groups with mobile ad hoc networks and uses MC as the enabling paradigm is introduced. Finally, macroscale MC studies with passive transmitters are detailed in the third part. A novel experimental platform which consists of an evaporating alcohol source and a sensor network is proposed. A sensor network based clustered localization algorithm is proposed to estimate the location of the passive transmitter.Article Citation - WoS: 6Citation - Scopus: 10Performance Analysis of Diffusion-Based Molecular Communications With Memory(Institute of Electrical and Electronics Engineers Inc., 2016) Galmes, Sebastia; Atakan, BarışIn this paper, the comprehensive delay and performance analyses of the $M$-ary molecular communications with memory are presented. By taking into account any level of channel memory, the type-based and concentration-based modulation schemes are introduced and analyzed. In the type-based modulation, information symbols are encoded through different molecule types. In the concentration-based modulation, various concentration levels of one molecule type are used to encode information symbols. For both modulation schemes, the delay distributions of the molecular symbols are derived, and then, the symbol error probabilities are developed. The given distributions and the error probability expressions are validated through extensive simulation experiments. After showing that the derived expressions are valid, the performance of the modulation schemes is evaluated. The performance evaluations reveal that by properly selecting the parameters such as slot time and number of emitted molecules, the performance can be improved in both type and concentration-based molecular communication as the channel memory is increased. Furthermore, it is shown that the type-based molecular communication outperforms the concentration-based molecular communication.Conference Object Citation - WoS: 4Citation - Scopus: 3On Exploiting Spatial Correlation for Energy Harvesting Wireless Sensor Networks(Institute of Electrical and Electronics Engineers Inc., 2017) Al-Qamaji, Ali; Atakan, BarışWireless Sensor Network (WSN) is a set of inexpensive densely deployed sensor nodes with limited functionalities and scarcity in energies. The observations of sensors are forwarded directly to the Base Station (BS). In densely deployed sensors, sensing data are likely to be highly correlated in space domain, which produces unfavorable redundant readings and wasting in energy. In this paper, we propose an Event Distortion-Based Node Selection (EDNS) algorithm which exploits spatial correlation for reducing inessential sensor nodes that have correlated readings for improving Energy-Efficiency (EE) with acceptable distortion level. Furthermore, we derive a theoretical framework of distortion function for single-hop communication model to observe the advantages from energy harvesting to the accuracy level. Furthermore, the trade-off between energy consumption and distortion level is investigated.Article Citation - WoS: 7Citation - Scopus: 9Fluid dynamics-based distance estimation algorithm for macroscale molecular communication(Elsevier, 2021) Güleç, Fatih; Atakan, BarışMany species, from single-cell bacteria to advanced animals, use molecular communication (MC) to share information with each other via chemical signals. Although MC is mostly studied in microscale, new practical applications emerge in macroscale. It is essential to derive an estimation method for channel parameters such as distance for practical macroscale MC systems which include a sprayer emitting molecules as a transmitter (TX) and a sensor as the receiver (RX). Due to the similarity between sneezing/coughing and spraying mechanisms, these practical systems have the potential to be applied in modeling airborne pathogen (viruses, bacteria, etc.) transmission with a MC perspective where an infected human emitting pathogen-laden droplets is considered as a TX. In this paper, a novel approach based on fluid dynamics is proposed for the derivation of the distance estimation in practical MC systems. According to this approach, transmitted molecules are considered as moving and evaporating droplets in the MC channel. With this approach, the Fluid Dynamics-based Distance Estimation (FDDE) algorithm which predicts the propagation distance of the transmitted droplets by updating the diameter of evaporating droplets at each time step is proposed. FDDE algorithm is validated by experimental data. The results reveal that the distance can be estimated by the fluid dynamics approach which introduces novel parameters such as the volume fraction of droplets in a mixture of air and liquid droplets and the beamwidth of the TX. Furthermore, the effect of the evaporation is shown with the numerical results. (C) 2021 Elsevier B.V. All rights reserved.Book Citation - Scopus: 37Molecular Communications and Nanonetworks: From Nature To Practical Systems(Springer, 2014) Atakan, BarışThis book will introduce the concept of molecular communications and nanonetworks. The publication addresses why nanoscale communication is needed for the sophisticated nano and biotechnology applications. The text introduces the frontier applications of the molecular communication and nanonetworks. The book examines the molecular communication types called active, passive, and gap junction molecular communications. The author presents the molecular transmitter, receiver, encoding and decoding mechanisms used in these systems. Discussing the molecular communication system model and looking at the unique characteristics of practical molecular communication systems and these chemical reactions and their effects on the communication performance. Finally, the book examines the point-to-point, broadcast, and multiple-access molecular channel and shows two promising application examples of the nanonetworks. The first application example is the body area nanonetworks used in nanomedicine. the second nanonetwork application example, i.e., NanoSensor Networks (NSNs) with Molecular Communication. © Springer Science+Business Media New York 2014.Article Citation - WoS: 14Citation - Scopus: 15A Droplet-Based Signal Reconstruction Approach To Channel Modeling in Molecular Communication(Institute of Electrical and Electronics Engineers Inc., 2021) Güleç, Fatih; Atakan, BarışIn this paper, a novel droplet-based signal reconstruction (SR) approach to channel modeling, which considers liquid droplets as information carriers instead of molecules in the molecular communication (MC) channel, is proposed for practical sprayer-based macroscale MC systems. These practical MC systems are significant, since they can be used in order to investigate airborne pathogen transmission with biological sensors due to the similar mechanisms of sneezing/coughing and sprayer. Our proposed approach takes a two-phase flow which is generated by the interaction of droplets in liquid phase with air molecules in gas phase into account. Two-phase flow is combined with the SR of the receiver (RX) to propose a channel model. The SR part of the model quantifies how the accuracy of the sensed molecular signal in its reception volume depends on the sensitivity response of the RX and the adhesion/detachment process of droplets. The proposed channel model is validated by employing experimental data. IEEEMaster Thesis Diyabetik Retinopati Görüntülerinin Analizi için Uyarlanır Yeniden Boyutlandırıcı Bütünleştirilmiş Derin Üretken Öznitelik Üretim Çerçevesi(2025) Harsa, Ahmet Emre; Gümüş, Abdurrahman; Atakan, BarışDiyabetik Retinopati (DR), diyabet hastalarında oluşan görme kaybının önde gelen nedenlerinden biri olup, erken ve doğru tespiti ciddi komplikasyonların önlenmesi açısından hayati öneme sahiptir. Bu tez, çeşitli verisetlerinde doğruluğu ve sağlamlığı artırmak için tasarlanmış olan Uyarlanır Yeniden Boyutlandırıcı Bütünleştirilmiş Derin Üretken Öznitelik Üretim (AR+DRFG) mimarisi ortaya koyarak fundus görüntülerinden otomatik DR tespiti için yeni bir yaklaşım sunmaktadır. Araştırma, DR tespiti için giriş görüntüsü küçültülmesi ve öznitelik çıkarma işlemleri için mevcut literatürdeki kritik boşlukları ele almaktadır. Önerilen çerçeve, giriş görüntülerini öznitelik çıkarımı için en uygun çözünürlüklere akıllıca yeniden boyutlandıran bir Uyarlanır Yeniden Boyutlandırıcı (AR) bileşenini, yeniden boyutlandırılmış görüntülerden sağlam ve üretken öznitelikler üreten bir Derin Üretken Öznitelik Üretim (DRFG) modeli ile bütünleştirir. Bu mimari, çeşitli tıbbi görüntüleme uygulamaları için geliştirilmiş genelleştirilebilirlik ve zengin öznitelik çıkarma kapasitelerini hedeflemektedir. Çalışmada yaygın olarak tanınan ve kamuya açık üç fundus görüntüsü veriseti kullanılmıştır: APTOS, MESSIDOR-2, ve IDRiD. Veri kıtlığını gidermek ve model genelleştirmesini iyileştirmek için veri artırımı teknikleri uygulanmıştır. Önerilen AR+DRFG mimarisi, hem Sınama Seti Doğrulama (hold-out validation), hem de k-Katlı Çapraz Doğrulama (k-Fold cross-validation) yöntemleri kullanılarak, VGG, ResNet, Inception, MobileNet, EfficientNet ve DenseNet ailelerine ait son teknoloji CNN kıyaslama modellerine karşı sistematik olarak değerlendirilmiştir. Kapsamlı deneysel sonuçlar, önerilen mimarinin her üç veriseti için de üstünlüğünü göstermektedir. Performans değerlendirmesi, basit doğruluk ölçütlerinin ötesinde, her DR şiddet seviyesi için ayrıntılı karışıklık matrisi analizi ile doğruluk ve kayıp grafikleri aracılığıyla eğitim dinamiklerinin incelenmesini de içermektedir. Sonuçlar, modelin sağlam genelleştirme kapasitelerini ve hastalığın farklı evreleri arasında ayrım yapmadaki güçlü yönlerini de ortaya koymaktadır. Bu araştırmanın temel katkısı, DR tespiti için son teknoloji genelleştirilebilirlikli zengin ve çeşitlendirilmiş öznitelik çıkarımı gerektiren birçok kullanım senaryolarına uygulanabilen daha doğru ve sağlam bir otomatikleştirilmiş sistem geliştirilmesinde yatmaktadır. Önerilen AR+DRFG mimarisi, diyabetik retinopatinin tespiti için tıbbi görüntü analizinde önemli bir ilerlemeyi temsil etmektedir.
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