Curriculum Vitae

Published academic books and book chapters to which I contributed as an author.

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• Image and Audio Processing — Book ChapterThe book chapter "Image and Audio Processing," co-authored with Nursel Yalçın, was published in Artificial Intelligence: From Theory to Practice, edited by Hüseyin Çakır and Çelebi Uluyol (Nobel Publishing, 2022, pp. 205-242, ISBN 978-625-427-802-0).
• Internet of Things and Digital Forensics — Book ChapterThe book chapter "Internet of Things and Digital Forensics," co-authored with Hüseyin Çakır, was published in Internet of Things: From Theory to Practice, edited by Hüseyin Çakır and Çelebi Uluyol (Nobel Publishing, 2021, pp. 399-410, ISBN 978-625-417-165-9).

General-purpose desktop software developed and published during the 2000s and 2010s through the personal website and software platforms of the period; some releases reached thousands of downloads.

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• Köker PortLogger 1.0A .NET serial-port terminal that can change communication parameters at runtime, display raw incoming data and persist captures for later analysis.
• Köker GizliBilgi 1.0An early .NET steganography application that hides text inside an image or audio carrier, reads it back later and provides optional password protection.
• Köker Zamanla! 1.0An early Windows scheduling utility that executes a selected system action, file/folder operation or user command after a delay and also supports command-line use.
• Köker Belgeindir 1.3A multithreaded document search and download application with tabbed browsing, preview, segmented downloads and an integrated file library.
• Köker YazıcıTamir 1.5A Windows utility that resolves printer problems by managing the Print Spooler service and forcibly clearing the printer queue.

Academic project archive covering undergraduate graduation projects and graduate-level term projects.

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• Spyware (Advisor: Assoc. Prof. Buket Doğan)My Marmara University Cybersecurity M.Sc. term project examining spyware behavior, defensive controls, legal/forensic implications and a controlled academic implementation.
• Speaker Recognition System (Advisor: Assoc. Prof. Nursel Yalçın)A digital-forensics term project on speaker recognition based on speech-signal separation, enhancement and filtering.
• Speech-Signal Separation System (Advisor: Assoc. Prof. Güray Sonugür)My Mechatronics Engineering graduation project: a C++ pipeline combining DSP/FFT speech enhancement, neural-network-based separation and MFCC/GMM speaker-recognition evaluation.
• Mini Unmanned Aerial Vehicle Software (Advisor: Assoc. Prof. Atilla Ergüzen)A computer-engineering graduation project covering UAV interface software, embedded software, electronic systems, communication and reliability-oriented design.

Open-source research software with source repositories on GitHub, archived releases and DOIs on Zenodo, and separate technical articles documenting the engineering context.

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• Forensic File CarverA C# forensic file-carving implementation that scans large binary sources as streams, shares signature prefixes in a byte trie, and applies format-aware boundary checks when a defensible end position can be determined.
• Forensic Telephony WAVE DecoderA Java decoder for RIFF/WAVE telephony audio that expands PCM and G.711 A-law/μ-law into PCM16 working copies while preserving the forensic distinction between evidence and derived analysis data.
• DCT Perceptual HashA C# image-similarity component that derives a 64-bit perceptual signature from a 64×64 DCT workspace and reduces later comparisons to XOR and Hamming distance.
• Variance Image QuantizerA C# RGBA quantizer that uses four-dimensional cumulative moments and variance-driven box splitting, then evaluates the actual encoded PNG size during iterative palette reduction.
• Turkish Finite-State SyllabifierA C# Turkish syllabifier that projects words onto vowel/consonant patterns and emits syllables through a 20-state table-driven finite-state transducer in linear time.
• Turkish Numeric SoundexA C# Soundex adaptation for Turkish names that normalizes Turkish-specific characters and packs the conventional phonetic code into a single Int32 candidate key.
• DbDataReader Streaming SerializationA C# serialization layer that streams DbDataReader results directly to JSON or XML through typed getters, avoiding DataTable/DTO materialization and resolving stable schema metadata once.
• CSV EnumerableA C# streaming mapper for controlled delimiter-separated data that resolves header/property mappings once and reads .gz inputs directly through GZipStream.
• RFID Keyboard-Wedge ReaderA .NET component that reconstructs a 4-byte RFID UID from eight hexadecimal keyboard events, handling Turkish Q/F layouts and keeping the per-key path allocation-minimal.
• Dynamic QR Code GeneratorA C# QR Code Model 2 encoder implementing mode selection, Reed-Solomon error correction, module placement, evaluation of all eight masks, and raster output without delegating the pipeline to a QR service.
• Lightweight AES-128A compact C implementation of the AES-128 block primitive that operates on 16-byte blocks without heap allocation and exposes the round transformations and key schedule directly.
• Turkish Identity Number ValidatorA small C# validator that checks Turkish identity-number check digits directly on a long, without regex, substring extraction or character-array materialization.
• HTS/CDR Analyzer for JavaOffline Java research software for HTS/CDR-style records with source provenance, RAW/DEDUP separation, and explainable contact, IMEI, temporal, and cell-site analysis.

Algorithms developed and optimized for specific mathematical, statistical and software-engineering problems.

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• Huffman Compression Algorithm OptimizationA desktop experiment examining Huffman prefix coding in terms of execution cost and compression ratio on file data.
• Subset Sum Algorithm Optimization and ParallelizationAn optimization project comparing exhaustive subset enumeration, dynamic programming and thread-based parallelism for counting subsets whose values match a target sum.
• NFA-to-DFA ConverterA finite-automata project that converts an NFA defined by transitions and accepting states into an equivalent DFA through reachable state subsets.
• Automaton-Based Substring AlgorithmAn optimized algorithm that generates a finite automaton for a target substring and determines whether another string contains it.
• Frequency Table GenerationA 2014 desktop project implementing frequency and cumulative-frequency tables, class intervals and optional Sturges-rule bin estimation with the algorithmic assumptions made explicit.
• Multithreaded Sorting Algorithm OptimizationAn experimental desktop application that races eight sorting algorithms on the same data using threads and compares measured completion times.
• A Solution Algorithm for Dudley’s Hat ProblemAn algorithmic experiment for Dudley's Hat that dynamically tracks subset-sum constraints to reduce search work; the historical project record reached a value of 27.

Electronics, hardware, mechatronics, robotics and embedded-software projects.

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• Fuzzy-Control-Based Agricultural Irrigation SystemAn agricultural irrigation system that uses sensor data and two fuzzy-control systems to regulate motor speed, voltage and operating duration.
• Remote-Controlled Access SystemAn Arduino/IR/servo access-control prototype later extended with desktop serial control and physical-state feedback.
• RFID Access-Control SystemMy 2014 RFID access-control project connects serial reader data, UID processing, authorization, Arduino and a servo actuator in one end-to-end hardware/software path.

Applications written in different languages to process and manage data stored in databases or files.

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• Köker Ticket Automation 1.0 (Java)An early Java desktop automation project for managing passengers, trips, seats, ticket sales, reporting and database-backed records.
• Köker Student Automation 1.0 (Java)The Java version of my earlier C++ student automation, reimplementing the same records and workflows in a different language and runtime.
• Köker Student Automation 1.0 (C++)A C++ file-based student automation covering students, courses, grades, transcripts, contribution fees, reports and user roles.
• Köker Hospital Automation 1.0 (C)An early C console application for file-based management of patient, examination, staff, cashier and reporting records.

Software developed to address specific technical or operational needs.

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• Spam Detection with Data-Mining TechniquesA spam-detection application based on Naive Bayes and n-gram features, implemented independently with Python, R and WEKA and evaluated with classification metrics.
• Köker Optimizer 1.0An early Windows performance utility for experimenting with process/thread priorities, processor affinity and related runtime parameters for a selected application.
• Köker SigmaCebir 1.0A .NET application for checking sigma-algebra conditions over a finite sample space and helping identify missing closure sets.
• Serial-Port Monitoring and Control SoftwareC# desktop and web tools for raw serial data, port configuration, logging and incremental monitoring during RFID/RS232 integration work.
• Access-Control Database ManagerA Java/JDBC and SQL Server desktop utility that used runtime table, column and primary-key metadata to manage access-control data.
• Access-Control UID SoftwareUtilities for RFID UID byte-order conversion, 4/7-byte representations, hexadecimal/binary inspection and historical data-protection experiments.

Websites designed and developed in accordance with contemporary web standards.

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• Computer Engineering Department WebsiteA web-programming course project in which I designed and developed a Computer Engineering Department website with PHP, HTML5 and CSS3.
• belgeindir.com (Under Development)A 2013 work-in-progress document search-engine project designed to crawl file-hosting sources, store document metadata in a database and make the collected records searchable.