WOS

Permanent URI for this collectionhttps://ada.atilim.edu.tr/handle/123456789/18

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Now showing 1 - 20 of 28

Citation - WoS: 3
An Agent-based Trading Infrastructure for Combinatorial Reverse Auctions
(Ieee, 2014) Bayindir, Hakan; Kilic, Hurevren; Rehan, Mohammed; Computer Engineering
A Combinatorial Reverse Auction Trading Infrastructure - CRATI is designed and implemented as an agent-based system. Two basic building blocks Java Agent Development Framework (JADE) and an Open Source Java Constraint Programming Library (Choco Solver) are used to facilitate agent interactions and an optimization task. For our purpose, it is shown that auction Winner Determination Problem (WDP) can suitably be represented as a weighted set covering problem instance whose solution gives the decided winners of the auction process. In order to realize the system, a variation of Contract Net protocol is designed and implemented to handle auctions that occur in the platform from start to finish.
Citation - WoS: 0
The American Dream: Cultural and Social Downfall in John Steinbeck's of Mice and Men
(Literary Voice, 2022) Aras, Goksen; Takva, Serdar
As known, throughout history, most societies have experienced hard times that have made life difficult to bear. Among these hard times are political, social and economic conditions which shape the ways human beings perceive the world and lead their lives. The Great Depression, that ravaged American society in the 1929s, is one of the most catastrophic economic events in the history of America and it is considered to be a calamity resulting in unemployed, desperate and even homeless people. John Steinbeck, being one of the foremost representatives of American writers, handles the devastating effects of the Great Depression and how it affected numerous people from different parts of the community. In this period, from women to the black, from the old to the disabled. most people wanted to lead a life based on humanly standards but what they expected turned into a frustration paving the way for the impossibility of the American dream and thus cultural and social downfall of such people no matter how hard they try to achieve their goals. Steinbeck's novel titled Of Mice and Men in this context is a touching representation of frustration, hopelessness, despair to have a place to live in, and a portrayal of unattainable happiness and the impossible American dream. This paper explores the futile efforts to realize the American dream and thus unhappiness and failure from Steinbeck's point of view and it presents the reflections of such a concept through the fictionalized characters in the novel.
Citation - WoS: 0
ATA50 TELESCOPE: HARDWARE
(Universidad Nacional Autonoma Mexico instituto Astronomia, 2014) Yesilyaprak, C.; Yerli, S. K.; Aksaker, N.; Yildiran, Y.; Guney, Y.; Gucsav, B. B.; Yasar, E.
ATA50 Telescope is a new telescope with RC optics and 50 cm diameter. It was supported by Atatiirk University Scientific Research Project (2010) and established at about 2000 meters altitude in city of Erzurum in Turkey last year. The observations were started a few months ago under the direction and control of Atatiirk University Astrophysics Research and Application Center (ATASAM). The technical properties and infrastructures of ATA50 Telescope are presented and we have been working on the robotic automation of the telescope as hardware and software in order to be a ready-on-demand candidate for both national and international telescope networks.
Citation - WoS: 1
BIOINSPIRED CONCEPTUAL DESIGN (BICD): CONCEPTUAL DESIGN OF A GRASSHOPPER-LIKE JUMPING MECHANISM AS A CASE STUDY
(design Soc, 2011) Eroglu, Aylin Konez; Erden, Zuhal; Erden, Abdulkadir; Department of Mechatronics Engineering; Mechatronics Engineering
The evolution process of nature creates highly effective, power efficient, and perfectly structured biological systems. These excellent systems provide an inexhaustible source for engineers and scientists who desire to inspire ideas, processes, structures, functions, and behaviors from biological domain and implement them into engineering domain. This approach is called "Bioinspired" and challenging for engineers. However, some problems of the practical approaches are observed. One of the problems is "ad hoc" nature of the process. Each bioinspired design product has resulted in a differing design process and a generalization was not possible. Another problem rises due to the terminology difference between engineers and biologists. To overcome these problems, a need for a systematic bioinspired design (BID) process was realized in early 2000s and since then, considerable research on the BID methodology has been progressed. Within the context of BID, this paper introduces a new approach on bioinspired conceptual design (BICD) procedure for hybrid bioinspired robots which can be inspired from multiple biological systems. An illustrative case study is given in the paper.
Citation - WoS: 3
Biomechanical Design and Control of Lower Limb Exoskeleton for Sit-to-Stand and Stand-to-Sit Movements
(Ieee, 2018) Qureshi, Muhammad Hamza; Masood, Zeeshan; Rehman, Linta; Owais, Muhammad; Khan, Muhammad Umer; Mechatronics Engineering
In this paper, we present design and development phase of lower limb robotic exoskeleton that can assist paralyzed individuals. Motion of the human wearing exoskeleton is introduced by actuators. Both exoskeleton legs are attached to the supporting frame by passive universal joints. The exoskeleton provides 3 DOFs per limb of which two joints are active and one passive. The control actions i.e., sit-to-stand and stand-to-sit movements are triggered using Double Pole Double Throw (DPDT) toggle switch. The control scheme is implement using Switch control method and the feedback is provided by means of current measurement. This assistive device can be utilized for the disabled persons. The simulation results are provided that evaluates the performance of the control actions on exoskeleton.
Citation - WoS: 1
Characterization of Satellite Transponder Impairments Based on Simulations with Test Data
(Ieee, 2015) Ulubey, Orhan; Gulgonul, Senol; Kara, Ali; Department of Electrical & Electronics Engineering
A satellite transponder simulator based on actual test data of TURKSAT 3A satellite has been developed to analyze degradation in multicarrier scenarios. Communication impairment sources through a transponder are explained in conjunction with a methodology defined to characterize total degradation resulting from them. Several transponder utilization scenarios are studied with respect to total degradation and optimum operation conditions are demonstrated.
Citation - WoS: 0
Cluttered Thoughts
(Forum Literary Voice, 2024) Aras, Goksen; Department of English Language and Literature
[No Abstract Available]
Citation - WoS: 0
COMPARISON OF COMPUTER-BASED PROPAGATION MODELS WITH EXPERIMENTAL DATA COLLECTED IN AN URBAN AREA AT 1800 MHz
(Ieee, 2015) Acar, Tarik; Caliskan, Fatma; Aydin, Elif; Department of Electrical & Electronics Engineering
Nowadays a lot of models are set for the efficient and economic usage of frequency band since the band is a limited source. Therefore, the propagation models created for this purpose were studied in the literature. These models are Free Space Path Loss (Fspl) + Reflection plus Multiple Diffraction (RMD), COST-Hata and COST-WI models. In order to compare the success of the models, electric field strength measurements were taken in a chosen district (Mustafa Kemal Mahallesi Ankara, Turkey) where an irregular structure style can be observed. First set of measurements were recorded at random coordinates and second set of measurements were collected by the following coordinates tracking on a single line. As a conclusion, measured values were compared with the results which were taken from the mentioned models with graphical presentations. The most appropriate model was tried to be found and as another aim of the study, a correction factor was generated as a modification for COST-Hata propagation model.
Citation - WoS: 0
A Comparison of Wavelet Family of Transforms from Image Forensics Perspective
(Turgut Ozal Univ, 2012) Ozparlak, Levent; Avcibas, Ismail
In this study, we compare wavelet based transforms for the cases of different image forensics problems. We extract wavelet based features and make experiments for different problems. The results show that a mixture of wavelet based features give the best performance in each experiment. In the absence of such a classifier with mixed features, the best performing features were obtained from contourlet transform coefficients.
Citation - WoS: 0
Effects of BPR on ERP Implementation Success and Supply Chain Performance
(Acad Conferences Ltd, 2012) Erkan, Erman; Bac, Ugur; Rouyendegh, Babak Daneshvar; Industrial Engineering; Computer Engineering
Recently, studies about the Enterprise Resource Planning (ERP) have been increased and this research area has attracted more attention. Especially, in the global competition environment, enterprises have to focus on their Information Systems (IS) performance to have a competitive advantage; implementing an ERP system and improving the effectiveness of the system is the only way. To do so; factors affecting the implementation success of ERP systems have to be inspected in pursuant of some performance measurements and metrics. Since unsuccessful ERP implementations result in high costs; use of these factors and making the necessary preparations will increase the chance of a successful ERP implementation. According to literature Business Process Reengineering (BPR) has a vital role on the ERP success. In this study, a research has been made on the Turkish enterprises to determine the criteria affecting their success on the implementation of ERP systems by the utilization of a questionnaire. Questionnaire results have been analyzed with statistical methods to summarize the current situation of IS structure, Information Management Systems integration level, ERP success rate and effects of BPR on this success rate in Turkish enterprises. Results of this study can be used to define the relation between the ERP and BPR. Understanding this relation is vital for the planned or ongoing ERP implementations. Factors and criteria found in this study which have effects on the ERP systems success should be considered during the implementation planning phase of these systems for efficiently managing the budget of projects. Importance of BPR which was emphasized in this study should be considered by the management of enterprises for evaluating their IS to determine if they are ready for the implementation phase. If they are not, findings will serve as a guideline for improving the chance of successful implementation and this will affect overall performance of the company. Results of this study can also be used in the future studies to compare international differences of IS structures and ERP implementation processes.
Citation - WoS: 0
Etches of Life
(Forum Literary Voice, 2024) Aras, Goksen
Citation - WoS: 4
AN EVALUATION OF TURKEY'S WESTERN BALKANS POLICY UNDER THE AKP AND PROSPECTS FOR THE POST-DAVUTOGLU ERA
(Selcuk Univ, inst Turkish Studies, 2018) Koc, Zeynep Elif; Onsoy, Murat; International Relations
This article argues that in the last decade there is a visible decline in the political, normative and economic power of the European Union (EU) as a dominant actor in the Western Balkans (WB). Particularly the slowing down of the EU's hegemonic project of Europeanization in the region created space for maneuver for other global and regional players. In this power vacuum, Turkey, alongside with Russia and China has aspired to play a central role in a region that is drifting into multi-polarity. This study aims to analyze Turkey's relations with the Western Balkans under the AKP Government.
Citation - WoS: 0
HOW TO WRITE POETICALLY
(Iated-int Assoc Technology Education A& development, 2012) Tekin, Kugu; Selimoglu, Zeynep Rana; Department of English Language and Literature
The importance of the role of writing in second language acquisition is indisputable. Compared to other skills, such as reading, listening and speaking, writing has a unique place, for it is a creative and productive stage of second language learning. It has been observed that almost every student has difficulty in writing. Students struggle to write even a solitary sentence let alone a well organized, coherent and accurate essay, which is a prerequisite for English Preparatory School students and for freshman students of English Language and Literature departments. The aim of this paper is to show how supposedly "boring" writing courses can be made attractive, enjoyable and at the same time productive to students. To this end, we provide our students with an atmosphere wherein creativity, enjoyment and above all, learning can take place. Our chosen medium in the construction of such a learning environment is poetry. The paper consists of two sections: the first is the theory section, which is about the function of literature. This section also includes a number of poetry definitions and the advantages of using poetry in writing courses. The second section focuses on practical activities to demonstrate how poetry can be applied to improve students' writing skills. The second section proceeds in three subsections entitled "pre-writing", "writing" and "post-writing". The overall aim of these activities is to integrate the two receptive language skills, reading and listening, and the two productive skills, writing and speaking. In conclusion, this paper is an attempt to turn a negatively perceived writing class into a student-friendly activity.
Citation - WoS: 0
Infrared Absorption Spectroscopy of Monolayers with Thin Film Interference Coatings
(Ieee, 2017) Ayas, Sencer; Bakan, Gokhan; Ozgur, Erol; Celebi, Kemal; dana, Aykutlu; Department of Electrical & Electronics Engineering
We report high performance Infrared spectroscopy platforms based on interference coatings on metal using CaF2 dielectric films and Ge2Sb2Te5 (GST) phase-change films. IR vibrational bands of proteins and organic monolayers are also detected.
Citation - WoS: 0
Citation - Scopus: 0
Lyapunov-Based Controller Design for Precise Monitoring, Speed Control and Trajectory Planning in Autonomous Tractors With Trailers
(Ieee, 2024) Aydin, Gulsah Demirhan; Dogan, Deren; Turken, Yusuf Tugberk; Mechatronics Engineering
Nowadays, modern technology-based agriculture operations are replacing traditional farming practices. Smart agricultural systems have gained popularity as a result of the demand for more productive and environmentally friendly farming methods. Consequently, the agricultural sector continues to be one of the driving forces behind automation, viewing technological advancements as a means of increasing productivity while lowering costs. Automation in agriculture ranges from tractors built with apparatus that can carry out complicated tasks on their own to cultivation surveillance. This study aims to optimize the speed of an autonomous tractor through a dynamic code based on Lyapunov control method as an innovative approach in smart agriculture. Beyond speed optimization, the research also addresses practical challenges encountered in real-world scenarios, including obstacles such as living entities. By evaluating the potential of Lyapunov control methodology in the effective management of agricultural machinery, this work offers an innovative perspective on smart agricultural technologies.
Citation - WoS: 0
Citation - Scopus: 0
A New Approach for Addressing Slip Ratio Optimization and Trajectory Tracking Challenges in Autonomous Tractor Operations
(Ieee, 2024) Aydin, Gulsah Demirhan; Aydemir, Ali Bahadir; Kansou, Mohamad Thaer; Altinuc, Kemal Orcun; Mechatronics Engineering; Mechatronics Engineering
The usage of autonomous agricultural machines is increasing. In this study, two controllers have been designed for trajectory following and longitudinal tire slip ratio control of a rear-wheel independent traction electric autonomous tractor. The first controller is model predictive control (MPC) and the second controller is proportional integral derivative (PID) based. To evaluate the performance of the controllers in the simulation environment, a mathematical tractor model is prepared. Simulations have been made and performances of the designed controllers are shared.
Citation - WoS: 0
Otherness and Displacement in Wide Sargasso Sea by Jean Rhys
(Literary Voice, 2023) Aras, Goksen; Takva, Serdar
English hegemonic colonial rule of the other parts of the world was based on unequal power relations and the domination of people from different cultures and ancestral backgrounds. Like the other colonized territories, the Caribbean was one of the countries whose social, political and cultural structure was dominated by England. During its rule in the Caribbean, Britain enslaved black people and forced them to work in the sugar cane plantations thus, created hostility between the Creoles and the black. More importantly, the colonizer othered the indigenous dwellers and the colonized people felt secure neither in their homelands nor in the colonizer's country which led to displacement. After the proclamation of independence, postcolonial writers from the former colonies tackle post-independence problems inherited by colonization in their work. Jean Rhys also handles controversial postcolonial concepts in her work. Her novel titled Wide Sargasso Sea is a notable narrative of the turbulent Caribbean life after the Emancipation. This paper in this sense explores Wide Sargasso Sea in terms of its representation of otherness and displacement in the context of postcolonial studies.
Citation - WoS: 0
Parking Space Occupancy Detection Using Deep Learning Methods
(Ieee, 2018) Akinci, Fatih Can; Karakaya, Murat; Computer Engineering
This paper presents an approach for gathering information about the availabilty of the parking lots using Convoltional Neural Network (CNN) for image processing running on an embedded system. By using an efiicent neural network model, we made it possible to use a very low cost embedded system compared to the ones used in previous works on this topic. This efficient model's performance is compared to one of the models that proved its accuracy in image classification competitions. In these tests, we used datasets that has thousands of different images taken from parking lots in different light and weather conditions.
Citation - WoS: 0
Pilot remote experiment in the ERRL
(Ieee, 2007) Oezen, Mustafa; Aydin, Elif Uray; Kara, Ali; Department of Electrical & Electronics Engineering
A remote laboratory platform enables the learners to access physical instruments at distant location and to perform experiments remotely via the Internet. This paper focuses on a pilot remote laboratory experiment on measurement of scattering parameters (s parameters) by using vector network analyzer (VNA) in the ERRL (European Remote Radio Laboratory) platform. The results of the pilot experiment are presented, and discussed shortly.
Citation - WoS: 0
Citation - Scopus: 0
Radar Cross Section Studies of Low Signature Uavs in X-Band: Simulation, Measurement and Performance Evaluation
(Ieee, 2024) Unalir, Dizdar; Gokdogan, Bengisu Yalcinkaya; Aydin, Elif; Department of Electrical & Electronics Engineering; Electrical-Electronics Engineering
In this study, the effectiveness of a radar cross section (RCS) reduction method based on a proposed shaping technique for four-legged unmanned aerial vehicles (UAV) has been proven with simulation tools and experimental measurements in X-Band. Simulative RCS values were obtained with CST and HFSS electromagnetic calculation tools, and the advantages of these tools compared to each other were examined. Experimental measurements were carried out in a laboratory environment with a vector network analyzer (VNA) and confirmed with simulation results. The effects of frequency, polarization and aspect angle factors on RCS were examined. It has been shown that with the proposed measurement method, low-cost and easily applicable RCS analysis can be performed in X-Band, one of the frequency bands frequently used in the defense industry. With the proposed shaping method, RCS reduction in the range of 5-10 dBsm was achieved.

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