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An improved KNN classifier based on a novel weighted voting function and adaptive k-value selection
No full textThis paper presents a modified KNN classifier (HMAKNN) based on the harmonic mean of the vote and average distance of the neighbors of each class label combined with adaptive k-value selection. Within the scope of this study, two different versions of HMAKNN, regular and weighted, HMAKNN(R) and HMAKNN(W), were developed depending on whether there is a weighting mechanism or not. These proposed HMAKNN classifiers were tested eight syntetic and twenty-six real benchmark data sets. In order to reveal the effectiveness and the performance of the proposed methods on classification, they were compared with its constituent KNN and four other well-known distance-weighted KNN methods. Unlike other weighting methods, both HMAKNN classifiers use the synergy between majority voting and average distance together, along with the ability to adaptively adjust the k-value, helping to significantly improve classification accuracy. The results on twenty-six real benchmark data sets suggest that both HMAKNN methods produce more accurate results in terms of average ACC and FScore metrics and statistically outperform all competing methods
On the Remarkable Advancement of Assistive Robotics in Human-Robot Interaction-Based Health-Care Applications: An Exploratory Overview of the Literature
No full textWith the rapid advancement of technology, assistive robotic entities have arisen as indispensable instruments within diverse Human-Robot Interaction (HRI)-based health-care applications. By integrating Artificial Intelligence (AI) into these assistive robotic entities, they gain the capacity to autonomously perceive, engage in sophisticated reasoning, and execute actions within highly dynamic and complex environments. In light of these impressive achievements, this paper highlights a three-stage exploratory overview of the literature on the remarkable advancement of assistive robotics in HRI-based health-care applications. The first stage initiates an assessment of assistive robotics spanning historical epochs from ancient to modern times. Following this, the second stage comprehensively explores assistive robotics investigations in the realm of HRI-based health-care with its four sub-fields including rehabilitation, geriatric-care, pediatric-care, and nursing. Finally, the third stage entails a thorough analysis of the common challenges encountered in these pertinent investigations and provides a set of recommendations. This comprehensive paper not only provides an abundance of studies for each concept, method, and application in HRI, but it also presents their theoretical foundations, strengths, gaps, critical challenges, and recommendations. The results of the conducted exploratory overview shed light on the noteworthy prominence of assistive robotic entities within the HRI-based health-care field. The acquired findings emphasize the positive impact of such entities on human health, affirming their pivotal role in contributing to the advancement and effectiveness of health-care interventions. Furthermore, this paper provides an opportunity for scholars and researchers actively engaged in the pertinent field to obtain comprehensive additional insights, serving as a guiding resource for their academic endeavors.The Turkish Council of Higher EducationNo Statement Availabl
Introduction of Co atoms into CdS thin films for improving photovoltaic properties
No full textThis paper represents a systematic work on the fabrication of chemical bath -grown CdS films with and without Co atoms and their photovoltaic performances in hybrid solar cells. Structural properties showed 1% Co -doping promoted crystal quality of CdS films. However, a poor crystal quality was developed above 3% Co concentrations. A reduction in sphere size of CdS samples was observed for 1% Co -doping which was ascribed to slow growth of film. Optical examination demonstrated CdS films with 1% Co -doping displayed the highest transparency of 85% in the visible and near -infrared regions, which were explained by the improvement of crystal quality. A maximum band gap of 2.43 eV was found for 1% Co -doped CdS films, whereas an increase in Co concentration to 7% led to a decline in the band gap of CdS that was attributed to sp-d exchange interaction. Photoluminescence data showed Co -doped CdS films had lower PL peak intensity than that of CdS, demonstrating a decrease in the number of intrinsic defects. Photovoltaic measurements displayed that the best efficiency of 0.488% was achieved for CdS-based device including 1% Co atoms, which were almost a seven -fold boost in overall efficiency compared to bare CdS-based device. The enhancement in power conversion efficiency originated from an increase in short-circuit current density of 1% Co -doped CdS-based photovoltaic cell.Scientific Research Projects Coordination Unit of Adana Alparslan Turkes Science and Technology University [21303022]; TUBITAK [1649B022203950]This work was supported by Scientific Research Projects Coordination Unit of Adana Alparslan Turkes Science and Technology University under a project number of 21303022. Author V.D. gained a scholarship from TUBITAK as part of 2210-C program with an application number of 1649B022203950
Imparting of Nearly Superparamagnetic Properties to Cryogel Scaffolds With Mesoporous MNPs for Magneto-Sensitive Tissue Engineering Strategies
No full textThis work reports the assembly of mesoporous iron oxide nanoparticles (meso-MNPs) with cryogel scaffolds composed of chitosan and gelatin. Meso-MNPs with a particle size ranging from 2 and 50 nm, a surface area of 140.52 m2 g-1, and a pore volume of 0.27 cm3 g-1 were synthesized on a porous SiO2 template in the presence of PEG 6000 followed by leaching of SiO2. Different ratios of meso-MNPs were successfully incorporated into chitosan:gelatin cryogels up to an amount equivalent to the entire amount of polymer. The morphological structure and physicochemical properties of the cryogels were directly affected by the amount of MNPs. VSM curves showed that all composite cryogels could be magnetized by applying a magnetic field. In the context of the safety of magnetic cryogel scaffolds for use in biomedicine, it is important to note that all values are below the exposure limit for static magnetic fields, and according to cytotoxicity data, scaffolds containing meso-MNPs showed nontoxicity with cell viability ranging from 150% to 275%. In addition, microbial analysis with gram-negative and gram-positive bacteria showed that the scaffolds exhibited activity against these bacteria. imageThe authors would like to thank Dr. Idris Adanur for his contributions to the interpretation of the magnetic properties of MNPs. We would like to thank the Proofreading & Editing Office of the Dean for Research at Erciyes University for copyediting and proofreading service for this manuscript
PROJECT MANAGERS' UNDERSTANDING OF CONTINUOUS IMPROVEMENT IN PROJECT MANAGEMENT
No full textIn today's dynamic business world, companies must be able to adapt flexibly to constant change. To maintain their competitive advantage, companies must constantly review and improve their operating protocols. The concept of continuous improvement is based on a processoriented view and aims to constantly refine the tools used to identify and solve problems. The adoption of the continuous improvement paradigm has steadily gained momentum in the field of project management. A comprehensive review of the existing literature reveals a conspicuous gap in the field of project management - insufficient attention to the integration of continuous improvement principles. In order to close this recognisable knowledge gap, this study examines in detail the role and reception of the philosophy of continuous improvement in the field of project management from the perspective of the project managers themselves. To achieve this goal, the insights and perspectives of project managers were systematically collected and subjected to rigorous analysis using an approach rooted in qualitative research methodology. The results of this research shed light on the high regard that project managers have for the continuous improvement approach. Nonetheless, they lament the incongruity of perspectives within the organizations they work for and point to a pronounced lack of understanding at the corporate level. It becomes clear that cultivating an institutional understanding of continuous improvement is essential for more effective execution of project management and mitigation of deviations from intended outcomes. Following the establishment of organizational awareness and the internalization of the principles of continuous improvement, the subsequent phase necessitates the training, motivation, and the establishment of a priority for continuous improvement throughout the entirety of the project management process
Astaksantin baskılanmış phema bazlı polimer ile yara/yanık örtü malzemesinin geliştirilmesi
No full textLisansüstü Eğitim Enstitüsü, Biyomühendislik Ana Bilim DalıAstaksantin, bir karotenoid pigmentidir ve doğada genellikle yosunlar, mantarlar, bakteriler, algler ve bazı deniz canlıları gibi organizmalarda bulunur. Yüksek antioksidan özelliklere sahip olan astaksantin, özellikle algi, kril, karides ve somon gibi deniz ürünlerinde yüksek miktarlarda bulunabilir. Astaksantin, karotenoid ailesine aittir ve özellikle kırmızı-pembe renk tonlarına sahiptir. Astaksantinin insan sağlığı üzerinde antioksidan ve anti-inflamatuar etkileri olduğu araştırılmış ve yara ve yanıklarla ilgili olarak, astaksantinin özellikle cilt sağlığına olan potansiyel faydaları bilinmektedir. Antioksidan ve anti-inflamatuar özellikleri, ciltteki serbest radikallerle savaşarak ve iltihaplanmayı azaltarak iyileşmeyi destekleyebilir. Bu çalışmada Astaksantin baskılanmış HEMA bazlı polimerler sentezlenmiş ve farklı miktarlarda Astaksantin içeren bu polimerler kullanılarak kriyojeller sentezlenmiştir. Hidroksietil metakrilat (HEMA) bazlı kriyojeller, şişme testleri, taramalı elektron mikroskobu ile karakterize edilmiştir. Kriyojellerin içerisine gömülen Asx-MIP miktarlarına bağlı olarak salım kinetiği incelenmiş; Asthaxthinin fare embriyonik fibroblast (MEF, (CF-1) (ATCC® SCRC-1040™)) hücre hattı üzerindeki etkisini inceleyebilmek için ise MTT assay uygulanmıştır. Sonucunda kriyojellerde bulunan astaksantinin hücre çoğalmasını artırıcı etkiye sahip olduğu görülmüş ve astaksantin içeren MIP kriyojellerin yara iyileşmesini kolaylaştırma potansiyeline sahip olduğu ve yara/yanık pansuman malzemesi olarak kullanabileceği kanıtlanmıştırAstaxanthin is a carotenoid pigment and is commonly found in nature in organisms such as algae, fungi, bacteria, algae and some marine creatures. Astaxanthin, which has high antioxidant properties, can be found in high amounts in seafood, especially algae, krill, shrimp and salmon. Astaxanthin belongs to the carotenoid family and has particularly red-pink hues. It has been researched that astaxanthin has antioxidant and anti-inflammatory effects on human health, and its potential benefits are known, especially for skin health, regarding wounds and burns. Its antioxidant and anti-inflammatory properties can promote healing by fighting free radicals in the skin and reducing inflammation. In this study, Astaxanthin imprinted HEMA based polymers were synthesized and cryogels were synthesized using these polymers containing different amounts of Astaxanthin. Hydroxyethyl methacrylate (HEMA)-based cryogels were characterized by swelling tests, scanning electron microscopy. Release kinetics were examined depending on the amount of Asx-MIP embedded into the cryogels; MTT assay was applied to examine the effect of astaxanthin on mouse embryonic fibroblast (MEF, (CF-1) (ATCC® SCRC-1040™)) cell line. As a result, it has been shown that astaxanthin contained in cryogels has a cell proliferation-enhancing effect, and it has been proven that MIP cryogels containing astaxanthin have the potential to facilitate wound healing and can be used as wound/burn dressing material
Yaya güzergahlarında erişilebilirlik düzeylerinin belirlenmesi: Çukurova üniversitesi yerleşkesi örneği
No full textGraphical/Tabular Abstract In this study, a method to determine the accessibility level of pedestrian roads and sidewalks was proposed and applied in a university campus as sample area. The flow chart of the study is illustrated in Figure A. Figure A. The flow chart of the study Purpose: In order to ensure accessibility to campus area, some basic principles must be followed. In this study, the accessibility standards determined by various countries were examined comparatively, and the accessibility criteria were determined by evaluating them together with the standards determined by TSE in Turkiye. These criteria were used to measure spatial accessibility of pedestrian routes. The weighting of the criteria for measuring spatial accessibility constituted the main problem of the study. Theory and Methods: With the specific structure of the analytical hierarchy process (AHP) method, which is one of the multi-criteria decision-making analysis techniques, the decision problem is modelled to determine the weighting of the criteria. Within the scope of the study, the spatial accessibility problems of the northern campus pedestrian routes of cukurova University in Turkiye were discussed, the barrier-free access project designed in this direction was examined along with the criteria, 12 different sample areas were selected, and the accessibility quality of the areas were determined using the weights of criteria. Results: Accessibility rates in the study area vary between 21% and 41%. The three most important criteria for ensuring accessibility on pedestrian routes has been determined as ensuring the continuity principle, availability of sufficient lighting, the use of direction/tracking stones for the visually impaired. Conclusion: The region with the highest accessibility level was calculated as the assembly area. The area with the lowest level of accessibility was determined as the pedestrian path and sidewalks below 3 m, which constitute a large part of the pedestrian access route, and it was determined that the accessibility of the campus adversely affected. It is thought that study outputs will provide both important output to other studies to evaluate the quality of urban accessibility and improve accessibility and to authorities or managers in the urban service area to assess the quality of urban accessibility and improve accessibility
Anlık satın alma davranışını etkileyen giyim mağazası ile ilgili değişkenlerin keşfedilmesi
No full textLisansüstü Eğitim Enstitüsü, Yönetim Bilişim Sistemleri Ana Bilim Dalı, Yönetim ve Organizasyon (İngilizce) Bilim DalıBu tez, giyim mağazaları ile ilgili değişkenlerin müşteri anlık satın alma davranışları üzerindeki etkisini araştırmaktadır. Stratejik ürün sergilemelerini kapsayan görsel düzenleme, müşterileri çekmede ve mağaza estetiğini artırmada önemli bir rol oynamaktadır. Çalışma, vitrin düzenlemeleri, manken sunumları, kat tasarımı, promosyonel gösterimler, renk, aydınlatma, mağaza düzeni, koku, müzik, çeşitlilik, satış promosyonları, hedonik motivasyon ve anlık alışveriş gibi unsurların ve bunların anlık satın alma davranışları üzerindeki etkilerine odaklanmaktadır. Veriler, demografik bilgiler ve belirli görsel düzenleme faktörlerini kapsayan yapılandırılmış bir anket aracılığıyla 400 katılımcıdan toplanmıştır. Araçların geçerliliğini sağlamak için Keşifsel Faktör Analizi (EFA) kullanılmış ve güvenilirlik Cronbach Alfa ile değerlendirilmiştir. Bulgular, tüm görsel düzenleme unsurlarının anlık satın alma davranışını olumlu yönde etkilediğini, promosyonel gösterimler ve manken sunumlarının en büyük etkiye sahip olduğunu göstermektedir. Korelasyon analizi, görsel düzenleme faktörleri arasında güçlü karşılıklı ilişkiler olduğunu ve bunların alışveriş ortamını geliştirmede kolektif rollerini vurgulamaktadır. Çalışma ayrıca, görsel düzenlemenin algılanmasında cinsiyet, yaş, gelir, eğitim düzeyi ve meslek gibi demografik farklılıkları incelemiş ve bu faktörler arasında önemli farklılıklar ortaya koymuştur. Bu bulgular, perakendecilerin görsel düzenleme stratejilerini farklı demografik segmentlere göre uyarlamaları gerektiğini önermektedir. Bu araştırma, perakendecilerin müşterileri çekmek ve satışları artırmak için görsel düzenleme stratejilerini geliştirmelerine yönelik değerli bilgiler sağlamaktadır. Gelecekteki çalışmalar, daha geniş coğrafi alanları keşfedebilir, anlık satın almanın psikolojik yönlerini içerebilir ve görsel düzenlemede yeni teknolojilerin potansiyelini araştırabilir. Anahtar Kelimeler: Görsel Düzenleme, Anlık Satın Alma, Müşteri Davranışı.This thesis investigates the influence of clothing store-related variables on impulse buying behaviors in clothing stores. Visual merchandising, encompassing strategic product displays, plays a pivotal role in attracting customers and enhancing store aesthetics. The study focuses on elements such as window displays, mannequin presentations, floor design, promotional displays, color, lighting, store layout, scent, music, variety, sales promotions, hedonic motivation, and spontaneous shopping, and their impact on impulsive buying behavior. Data was gathered from 400 respondents through a structured questionnaire covering demographic details and specific visual merchandising factors. Exploratory Factor Analysis (EFA) was employed to ensure the validity of the instrument, and reliability was assessed using Cronbach's Alpha. Findings indicate that all visual merchandising elements positively affect impulsive buying, with promotional displays and mannequin presentations having the most significant impact. The correlation analysis demonstrated strong interrelationships among the visual merchandising factors, highlighting their collective role in enhancing the shopping environment. The study also examined demographic differences in the perception of visual merchandising, revealing significant variations based on gender, age, income, education level, and occupation. These findings suggest that retailers should tailor their visual merchandising strategies to different demographic segments to optimize their effectiveness. This research provides valuable insights for retailers seeking to refine their visual merchandising strategies to attract customers and boost sales. Future studies could explore broader geographic areas, delve into the psychological aspects of impulsive buying, and investigate the potential of new technologies in visual merchandising. Keywords: Visual Merchandising, Impulsive Buying, Customer Behavior
Ieee 802.15.4 üzerinde çalışan nesnelerin interneti için mikro adlandırılmış veri ağı çatısı
No full textFen Bilimleri Enstitüsü, Elektrik ve Elektronik Mühendisliği Ana Bilim DalıNesnelerin İnterneti (IoT), popülerliğini gün geçtikçe artıran bir konsepttir. Günlük hayatta artık sıklıkla karşılaşmaya başladığımız bu IoT cihazları, sağlık, akıllı ev/ofis, tarım, otomasyon gibi pek çok alanda kullanılmaktadır. IoT ağları çoğunlukla bu IoT cihazlarından veri almaya dayalıdır. Bu veri-merkezcil yaklaşım, günümüzde popülaritesi oldukça artan Veri Merkezli Ağ (ICN) mimarilerinden birisi olan Adlandırılmış Veri Ağları'nın (NDN) veri-merkezciliği ile örtüşmektedir. Bunun sonucunda, IoT konseptinin ve NDN mimarisinin birleşimi, NDNoT konseptini ortaya çıkartmıştır. Bu çalışma, oldukça yeni olan NDNoT konsepti üzerindeki gelişmelere odaklanırken, bu konsept ile uyumlu olan µNDN protokol yığınını ve yenilikçi IfNoT mekanizmasını önermektedir. Çalışma, bunların yanı sıra, TM-RONR iletim mekanizmasını da literatüre sunmaktadır. Gerçekleştirilen bu çalışmaların yanı sıra, µNDN yığını üzerinde etkisi olabilecek önbellekleme, FIB boyutu gibi kavramlar da incelenmiş ve performans analizlerine tabi tutulmuştur.The Internet of Things (IoT) is a concept that is increasing in popularity day by day. These IoT devices, which we increasingly encounter daily, are used in many areas, such as health, smart home/office, agriculture, and automation. IoT networks are primarily based on receiving data from these IoT devices. This data-centric approach aligns with the data-centricity of Named Data Networks (NDN), one of the Information Centric Network (ICN) architectures increasing in popularity today. As a result, the combination of the IoT concept and NDN architecture gave rise to the NDNoT concept. While this study focuses on improvements in the relatively new NDNoT concept, it proposes the µNDN protocol stack and the innovative IfNoT mechanism on top of µNDN. In addition, the study also presents the TM-RONR forwarding mechanism to the literature. Along with these studies, concepts such as caching and FIB size, which may impact the µNDN stack, were also examined comprehensively and subjected to performance analysis
Recycling the electric arc furnace waste after geopolymerization in bitumen: experimental analyses and LCA study
No full textThe conversion of solid waste materials into cleaner products for road paving. applications appears to be a promising and sustainable option. However, there is still a lack of attention given to quantifying the potential environmental benefits of recycling solid wastes in asphalt pavements, regarding the impact on asphalt performance. To address this gap, the present study investigates the effects of recycling electric arc waste based geopolymers on asphalt binder and mixture characteristics, as well as environmental outputs. For this purpose, geopolymers were incorporated into both neat and SBS-modified binders. A comprehensive rheological investigation was conducted using cutting-edge multiple stress creep recovery (MSCR) and linear amplitude sweep (LAS) analyses. Stability, Marshall quotient, and flow values, as well as dry and wetconditioned tensile strength were considered, to determine asphalt mixture properties. In the Life Cycle Assessment (LCA), greenhouse gases resulting from fuel and energy consumption in each inventory phase were determined. The varying service lifetimes, maintenance and rehabilitation plans, and production and construction requirements of the different asphalt schemes were taken into account. Subsequently, the environmental impacts of the asphalt mixtures, including global warming potential, acidification, eutrophication, and smog formation potential, along with the total energy demand, were calculated across different stages of the LCA. The results show that the geopolymerization process results in important contributions in terms of both environmental savings and pavement performance.Adana Alparslan Turkes Science and Technology UniversityNo Statement Availabl