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Conference Object Citation Count: 3Achieving success in supply chain management software by agility(Springer Verlag, 2007) Mıshra, Deepti; Mishra,A.; Mıshra, Alok; Computer Engineering; Software EngineeringSupply chain management is comprehensive software. Due to its scope and unpredictable, complex and unstable requirements, it is not possible to develop it with predictable development process models. Agile methodologies are targeted towards such kind of problems that involves change and uncertainty, and are adaptive rather than predictive. The aim of this paper is to analyze the management and development methodologies used in development of supply chain management software. This paper shows how to overcome risks and handicaps in each development phase of a complex inventive project. It also provides a set of guidelines regarding how the agile methods may be adopted, combined and used in these kinds of projects. © Springer-Verlag Berlin Heidelberg 2007.Conference Object Citation Count: 0Adapting test-driven development for innovative software development project(Springer Verlag, 2007) Mıshra, Deepti; Mishra,A.; Mıshra, Alok; Computer Engineering; Software EngineeringIn Test-Driven development, first test is made according to the customer requirement and then code is prepared to execute this test successfully. In this approach, design is not done exclusively before preparing test cases and coding. Design emerges as software evolves but this may result in lack of design quality. We adapted TDD by incorporating exclusive architectural design phase in the successful implementation of an innovative, large scale, complex project. © Springer-Verlag Berlin Heidelberg 2007.Article Citation Count: 0Advanced 3D printed bone scaffolds with sodium alginate/Tri-calcium phosphate/probiotic bacterial hydroxyapatite: Enhanced mechanical and biocompatible properties for bone tissue engineering(Elsevier Ltd, 2024) Şaşmazel, Hilal Türkoğlu; Emtiazi,G.; Ulag,S.; Gunduz,O.; Calikoglu Koyuncu,A.C.; Roghanian,R.; Sasmazel,H.T.; Metallurgical and Materials EngineeringIntroduction: The increasing prevalence of severe bone diseases, such as osteoporosis and critical bone defects, necessitates the development of more effective bone substitutes. This study addresses this need by investigating 3D-printed bone scaffolds composed of sodium alginate and tricalcium phosphate, enhanced with three distinct types of hydroxyapatite (HA): bovine-derived HA, commercially available HA, and HA enriched with probiotic bacteria. We aim to evaluate the performance of these scaffolds in terms of mechanical strength, biocompatibility, and their ability to support bone regeneration. Methods: The scaffolds were analyzed through various tests, including X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC) to characterization. Scanning Electron Microscopy (SEM) was used to examine pore structure, while swelling and degradation tests evaluated the scaffold's stability. Compression testing determined mechanical strength, and in vitro cell culture assays assessed cell proliferation, osteogenic differentiation, and biomineralization. Results: SEM results indicated that 3D scaffolds with probiotic bacterial HA had the desired 472 μm pore size. These scaffolds demonstrated a strain of 29.26 % and a compressive strength of 10 MPa, meeting the mechanical standards of human trabecular bone. Cell culture studies revealed enhanced cell proliferation by 50 %, osteogenic differentiation with 15.3 U/mg ALP activity, and 1.22-fold biomineralization, suggesting they are highly biocompatible and promote bone growth. Conclusion: Probiotic bacterial HA scaffolds exhibit ideal properties and biocompatibility, enhancing bone regeneration and serving as an ideal alternative to chemical types. © 2024 Elsevier LtdReview Citation Count: 0Akciğer kanserinde immünoterapi ve tedavide multidisipliner yaklaşım(Turkish Assoc Tuberculosis & Thorax, 2020) Tülek, Necla; Karadurmuş, Nuri; Kaya, Akın; Göksel, Tuncay; Yılmaz, Ülkü; Tülek, Necla; Basic SciencesAkciğer kanseri dünya genelinde kanserle ilişkili ölümlerin başlıca nedeniolmaya devam etmektedir. Son 20 yılda kanser biyolojisi ve patogenezi hakkındaki bilgiler artmış, immün kontrol noktası inhibitörleri (İKNİ) kullanımasunulmuş ve böylece solid kanserlerin tedavisinde önemli bir dönem başlamıştır. Bu derlemede; tedavide yenilikler, immünoterapi ve tedavide multidisipliner yaklaşım çerçevesinde akciğer kanseri ele alınmıştır. Küçük hücreli dışıakciğer kanseri (KHDAK) en sık görülen ve özellikleri nedeniyle İKNİ tedavisinden ideal olarak yararlanabilecek akciğer kanseri türü olması nedeniyleyazının odak noktasını oluşturmuştur. Bu derleme, akciğer kanseri tedavisindeimmünoterapi yaklaşımının göğüs hastalıkları başta olmak üzere tüm branşlarda multidisipliner farkındalığını artırmayı ve yönetimi hakkında bilgi sağlamayıamaçlayan ilk Türkçe derlemedir. Ayrıca bu derleme, KHDAK tedavisinde İKNİkullanımına ilişkin son klinik çalışmaların dikkat çekici sonuçlarını sunmasıaçısından önem teşkil etmektedir. İmmünoterapi kanser tedavisinde yeni bir dönem başlatmıştır ve İKNİ tedavisinin kendine özgü etki mekanizması yeni bazı advers olay grubunun ortaya çıkmasına nedenolmuştur, bunlar arasında pnömonitis özellikle önemlidir ve advers olaylar konusunda gerektiğinde hastaların ilgili uzmanlık dalları ilekonsülte edilmesi gerekmektedir. Akciğer kanserinde tedavi, hastanın özellikleri, histolojik özellikler, genetik durum göz önünde bulundurularak her bir hastaya özel planlanmalı ve akciğer kanserli bir hastanın tanısal değerlendirilmesi ve en uygun şekilde tedavisi içingöğüs hastalıkları, göğüs cerrahisi, tıbbi onkoloji, radyasyon onkolojisi, patoloji ve radyoloji uzmanlık dalları arasında işbirliği sağlanmalıdır. Bununla birlikte, aile hekimleri de akciğer kanserinin erken tanınmasında ve ayrıca hastalarını tütün bırakmayı teşvik ederekkanserin önlenmesinde önemli rol oynayabilirler. Ayrıca, toplumda farkındalık yaratmak ve erken tanı için akciğer kanseri yönündentarama çalışmaları yapmak hedeflenmelidirConference Object Citation Count: 0An approach for Improving Performance of Sensorless Field Control(Institute of Electrical and Electronics Engineers Inc., 2018) Ertan, Hulusi Bülent; Filci,T.; Electrical-Electronics EngineeringSensorless vector control is preferred in some applications, because there is no need for speed or position sensor. However, by their very nature, they are susceptible to making position error in rotor position estimation. As a consequence the performance of motor drives employing this technology is lower than those which employ sensors. This paper presents a new approach which identifies and uses rotor slot harmonic current component in the stator current to identify rotor position. The time taken by the algorithm used is short enough to be embedded within the vector control algorithm. The essence of the algorithm is treating the current component due to rotor slot harmonics as an amplitude modulated signal on the fundamental current component. The magnitude of this current component is identified via demodulation. Using this information rotor position and speed can be determined. This approach is tested on a commercial induction motor and some results are presented which illustrate that rotor position can be successfully determined. © 2018 IEEE.Conference Object Citation Count: 9Biomechanical Design and Control of Lower Limb Exoskeleton for Sit-to-Stand and Stand-to-Sit Movements(Institute of Electrical and Electronics Engineers Inc., 2018) Khan, Muhammad Umer; Masood,Z.; Rehman,L.; Owais,M.; Khan,M.U.; Mechatronics EngineeringIn 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. © 2018 IEEE.Article Citation Count: 0Borulu Sulama Şebekeleri Optimizasyonu(Turkish Chamber Civil Engineers, 2018) Darama, Yakup; Marım, Gökhan; Darama, Yakup; Bozkuş, Zafer; Civil EngineeringBorulu sulama şebekeleri ülkelerin tarımsal ürün yetiştirmesinde ve su tasarrufunda enönemli sistemlerdir. Günümüzde tarımsal amaçlı sulama, su tüketiminin en yüksek olduğusektördür. Ülkemizde tarım sektörünün kullandığı su miktarı su potansiyelimizin %73oranındadır. Ülkemizde ve genelde Dünyada nüfus artışı nedeniyle tarımsal üretimde sutalebinin artması ve su kaynaklarımızın sınırlı olması nedeniyle sürdürülebilir su kaynaklarıyönetimi zorunlu olmaktadır. Son yıllarda ülkemizde yapılan sulama sistemleri yatırımlarınınbüyük bir çoğunluğunu, su kaybını ve tarımsal su kullanımını azaltan modern borulu sulamaşebekeleri yatırımları oluşturmaktadır. Bu çalışma borulu sulama şebekelerinintasarımlarının maliyet ve istenen işletme basınçları açısından optimum koşullara ulaşmasınaodaklanmıştır. Optimizasyon problemi çözümünde heuristik tabanlı dinamik programlamaile birlikte doğrusal programlama yöntemi olan “Simplex” metodu kullanılmış olup, buoptimizasyon yazılımı DSİ borulu sulama şebekeleri için uygulanmıştır.Article Citation Count: 12Carrier transport properties of InS single crystals(2002) Qasrawı, Atef Fayez Hasan; Gasanly,N.M.; Department of Electrical & Electronics EngineeringThe electrical resistivity and Hall effect of indium sulfide single crystals are measured in the temperature range from 25 to 350 K. The donor energy levels located at 500, 40 and 10 meV below the conduction band are identified from both measurements. The data analysis of the temperature-dependent Hall effect measurements revealed a carrier effective mass of 0.95 m0, a carrier compensation ratio of 0.9 and an acoustic deformation potential of 6 eV. The Hall mobility data are analyzed assuming the carrier scattering by acoustic and polar optical phonons, and ionized impurities.Conference Object Citation Count: 3Comparison of a Magnetically Geared PM Wind Generator with Radial Flux Generator(Institute of Electrical and Electronics Engineers Inc., 2018) Ertan, Hulusi Bülent; Ertan,H.B.; Electrical-Electronics EngineeringDirect drive wind turbines promise to be more reliable and efficient than commonly used geared wind turbines. This paper presents part of a study aiming to identify whether 'Dual Stator Spoke Array Vernier Permanent Magnet' (DSSAVPM) generators present an advantage, regarding size or cost, as compared to the conventional radial flux PM machine for direct drive applications. For this purpose, design of both machines is optimized for the same specifications and using the same design criteria. optimization results are presented and discussed. It is found that a DSSVPM generator design, with almost the same performance as the RFPM generator, but with 45% of its mass is possible. © 2018 IEEE.Conference Object Citation Count: 22A Comparison of Stream Processing Frameworks(Institute of Electrical and Electronics Engineers Inc., 2017) Yazıcı, Ali; Yazici,A.; Karakaya, Ziya; Software Engineering; Computer EngineeringThis study compares the performance of Big Data Stream Processing frameworks including Apache Spark, Flink, and Storm. Also, it measures the resource usage and performance scalability of the frameworks against a varying number of cluster sizes. It has been observed that, Flink outperforms both Spark and Storm under equal constraints. However, Spark can be optimized to provide the higher throughput than Flink with the cost of higher latency. © 2017 IEEE.Article Citation Count: 18Creep and shrinkage behavior of high-strength concrete and minimum reinforcement ratio for bridge columns(Precast/Prestressed Concrete Institute, 2010) Mertol, Halit Cenan; Rizkalla,S.; Zia,P.; Mirmiran,A.; Civil EngineeringThis paper summarizes the findings of an extensive research program that examined the shrinkage and creep behavior of high-strength concrete (HSC) up to a strength of 18 ksi (124 MPa). Creep and shrinkage strains of 60 specimens were monitored for up to two years. The variables considered in this investigation were the concrete compressive strength, specimen size, curing type, age of concrete at loading, and loading stress level. Research findings indicate that the current American Association of State Highway and Transportation Officials' AASHTO LRFD Bridge Design Specifications could be used to estimate the creep coefficient and shrinkage strain of HSC up to 15 ksi (103 MPa). However, the current AASHTO LRFD specifications do not provide appropriate predictions for concrete compressive strength greater than 15 ksi (103 MPa). A revised time-development correction factor is proposed to obtain better predictions for HSC up to 18 ksi (124 MPa). For HSC compression members, the current AASHTO LRFD specifications require an excessive amount of minimum longitudinal reinforcement to account for the long-term effects due to shrinkage and creep. Based on an analysis, a new relationship is proposed for the required minimum reinforcement ratio.Article Citation Count: 0Crosslinked polyethyleneimine-based structures in different morphologies as promising CO2 adsorption systems: A comprehensive study(John Wiley and Sons Inc, 2024) İnger, Erk; Inger,E.; Bhethanabotla,V.; Sahiner,N.; Airframe and Powerplant MaintenanceAlthough there are many studies on CO2 adsorption via PEI-modified carbon particles, metal–organic frameworks, zeolitic imidazolate frameworks, and silica-based porous structures, only a limited number of studies on solely cross-linked PEI-based structures. Here, the CO2 adsorption capacities of PEI-based microgels and cryogels were investigated. The effects of various parameters influencing the CO2 adsorption capacity of PEI-based structures, for example, crosslinker types, PEI types (branched [bPEI] or linear [lPEI]), adsorbent types (microgel or cryogel), chemical-modification including their complexes were examined. NaOH-treated glycerol diglycidyl ether (GDE) crosslinked lPEI microgels exhibited higher CO2 adsorption capacity among other microgels with 0.094 ± 0.006 mmol CO2/g at 900 mm Hg, 25°C with 2- and 7.5-fold increase upon pentaethylenehexamine (PEHA) modification and Ba(II) metal ion complexing, respectively. The CO2 adsorption capacity of bPEI and lPEI-based cryogels were compared and found that lPEI-GDE cryogels had higher adsorption capacity than bPEI-GDE cryogels with 0.188 ± 0.01 mmol CO2/g at 900 mm Hg and 25°C. The reuse studies revealed that NaOH-treated GDE crosslinked bPEI and lPEI microgels and cryogels showed promising potential, for example, after 10-times repeated use >50% CO2 adsorption capacity was retained. The results affirmed that PEI-based microgels and cryogels are encouraging materials for CO2 capture and reuse applications. © 2024 The Author(s). Journal of Applied Polymer Science published by Wiley Periodicals LLC.Book Part Citation Count: 5Cyber stalking: A challenge for web security(IGI Global, 2007) Mıshra, Deepti; Mishra,D.; Mıshra, Alok; Computer Engineering; Software EngineeringCyber stalking is a relatively new kind of cyber terrorism crime. Although it often receives a lower priority then cyber terrorism it is an important global issue. Due to new technologies, it is striking in different forms. Due to the Internets provision of anonymity and security it is proliferating quickly. Technology and tools available to curb it have many limitations and are not easy to implement. Legal acts to protect people from cyber stalking are geographically limited to the concerned state or country. This chapter reviews cyber stalking, its approaches, impacts, provision of legal acts, and measures to be taken to prevent it. There is an immediate need for research in the various dimensions of cyber stalking to assess this social problem. © 2008, IGI Global.Conference Object Citation Count: 11A Decentralized Application for Secure Messaging in a Trustless Environment(Institute of Electrical and Electronics Engineers Inc., 2019) Yazıcı, Ali; Culha,D.; Çulha, Davut; Software EngineeringBlockchain technology has been seeing widespread interest as a means to ensure the integrity, confidentiality and availability of data in a trustless environment. They are designed to protect data from both internal and external cyberattacks by utilizing the aggregated power of the network to resist malicious efforts. In this article, we will create our own decentralized messaging application utilizing the Ethereum Whisper protocol. Our application will be able to send encrypted messages both securely and anonymously. We will utilize the Ethereum platform to deploy our blockchain network. This application would be resistant to most suppression tactics due to its distributed nature and adaptability of its communication protocol. © 2018 IEEE.Conference Object Citation Count: 0Deep Learning and Current Trends in Machine Learning(Institute of Electrical and Electronics Engineers Inc., 2018) Bostan, Atila; Ekin,C.; Şengül, Gökhan; Karakaya, Kasım Murat; Tirkes,G.; Computer EngineeringAcademic interest and commercial attention can be used to identify how much potential a novel technology may have. Since the prospective advantages in it may help solving some problems that are not solved yet or improving the performance of readily available ones. In this study, we have investigated the Web of Science (WOS) indexing service database for the publications on Deep Learning (DL), Machine Learning (ML), Convolutional Neural Networks (CNN), and Image Processing to reveal out the current trend. The figures indicate the strong potential in DL approach especially in image processing domain. © 2018 IEEE.Conference Object Citation Count: 0Design and Implementation of an Expressive Talking Mobile Robot: TozTorUs(Institute of Electrical and Electronics Engineers Inc., 2018) Tozan, Özalp; Tora, Hakan; Uslu,B.; Una,B.; Ceylan,E.; Computer Engineering; Airframe and Powerplant MaintenanceThis paper is about a brand new robot and all its development stages from the design to the show time. As an undergraduate research project (the LAP program at Atilim University), the robot TozTorUs is the outcome of the dense efforts of a team. With the sensors equipped, it navigates autonomously in the environment in which it is located by avoiding the obstacles. It can understand your questions and answer them using Google's speech technologies. Although it is not a humanoid robot, with eyes and mouth simulator LED displays, it is as friendly as a human. We can also control TozTorUs using a mobile phone. Apart from these, it is able to adjust its height with respect to the visitor's, thus allowing it to make an eye contact with the person. Although TozTorUs is designed for welcoming, it may also be employed for consulting, security and elderly assistance. © 2018 IEEE.Article Citation Count: 0Design and techno-economic analysis of solar energy based on-site hydrogen refueling station(Pergamon-elsevier Science Ltd, 2024) Devrim, Yılser; Devrim, Yilser; Energy Systems EngineeringThis paper presents a detailed techno-economic review and assessment of a hydrogen refueling station (HRS) powered by a grid-connected photovoltaic (PV) system to address the issues of carbon emissions and energy sustainability in transportation. In the study, the HRS system with 1, 3 and 5 MW PV installed capacity for Ankara, the capital city of T & uuml;rkiye, is considered for different system lifetimes. In the proposed HRS, on-site hydrogen production is achieved through anion exchange membrane water electrolysis (AEMWE) using a grid-connected PV system, and the produced hydrogen is stored in a cascaded storage system and is utilized at the HRS station. In order to evaluate the cost competitiveness and economic viability of the designed HRS system, the levelized cost of hydrogen (LCOH) is determined by considering the initial investment costs, operating expenses and potential revenue streams. The results show that the HRS capacity, PV installed capacity and system lifetime significantly impact the LCOH. The technoeconomic analysis results show that the best system configuration was determined as 8.54 /kg H2 in the 20-year long term refueling scenario for a 5 MW installed PV capacity with a daily refueling capacity of 170 kg H2. This study contributes to the development of sustainable energy infrastructure by providing a comprehensive framework for the design, calculation and economic evaluation of PV-integrated hydrogen refueling stations. The results provide valuable information for policymakers, industry stakeholders, and researchers to help achieve a carbon-neutral transportation sector and promote energy sustainability.Conference Object Citation Count: 0Developing a data warehouse for distance remote laboratory(2007) Türkmen, Güzin; Cagiltay,N.E.; Computer EngineeringData warehouse is an important contemporary issue for many organizations and is relatively a new field in the realm of information technology. As data warehousing, e-learning is also a new field. Little research has been done regarding the special considerations and characteristics of academic data and the complexity of analyzing such data. Educational institutions measure success very differently from business-oriented organizations and the analyses that are meaningful in such environments cause unique problems in data warehousing. Especially for the educational purposes, data warehouses offer several benefits. This paper discusses the use of Data Warehouse and Decision Support resources to aid in the assessment of Distance Remote Laboratory Environment.Conference Object Citation Count: 0Development of Ni-Al-Based Composites Reinforced with Recycled AA7075+AA1050 and Ceramics Produced by the Sintering plus Forging Process(Springer international Publishing Ag, 2024) Aslan, Özgür; Klinkova, Olga; Aslan, Ozgur; Miskioglu, Ibrahim; Bayraktar, Emin; Mechanical EngineeringIn this study, the microstructural formation and static/cyclic compression behavior of "Ni-Al+AA7075 +AA1050"-based composites reinforced with ceramics (TiC-TiB2) have been evaluated. It is aimed at creating a new design to be an alternative to traditional alloys/composites used in the aeronautical industry. These composites are generally produced using a combined method that we call "sinter + forging processes". The static and dynamic properties and also the microstructure (including the distribution of reinforcement elements) are evaluated in detail.Book Part Citation Count: 0E-mentoring in global software development teams: Success factors to develop a common culture(IGI Global, 2012) Colomo-Palacios,R.; Mıshra, Alok; Mishra,A.; Casado-Lumbreras,C.; Soto-Acosta,P.; Software EngineeringGlobal Software Development (GSD) teams face communication and coordination problems due to spatial, temporal, and cultural separation between team members. Cultural diversity and cross-cultural management are significant issues among GSD teams. In software development projects, mentoring dramatically reduces the learning curve for novice human resources. Due to the large amount of electronic communication instruments, a remarkable number of different e-Mentoring concepts have emerged, which provides opportunity for mentoring that would not otherwise be possible. This chapter presents key success factors to enable e-Mentoring as a tool to develop a common culture in GSD scenarios. These success factors enable the correct application of mentoring programmes and the use of this to build a common culture in organizations that perform GSD. © 2013, IGI Global.