Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Kaygusuz, Abdullah(35)
- Sipahi, Ferkan(35)
- Karsli, Orhan(34)
- Dokuz, Abdurrahman(30)
- Duran, Celal(30)
- Kandemir, Raif(29)
- Ozdes, Duygu(28)
- Maden, Nafiz(27)
- Uzun, Sevda(27)
- Merdan, Mehmet(26)
- Vural, Alaaddin(26)
- Öztürk, Serkan(25)
- Araz, Onur(24)
- Kulakaç, Nurşen(24)
- Ashyralyyev, Charyyar(23)
- Yildiz, Salih(23)
- Yilmaz, Ozgur(23)
- Doğan, Kadir Caner(21)
- Arslan, Mehmet(20)
- Aydin, Faruk(20)
- Doğru, Bülent(20)
- Bayraktar, Alemdar(19)
- Kankal, Murat(19)
- Ayaydin, Hasan(18)
- Baltaci, Cemalettin(18)
- Yolcu, Halil(18)
- Cakir, Tufan(17)
- Cengiz, Ekrem(17)
- Demir, Selim(17)
- Gücer, Mehmet Ali(17)
- Akaryali, Enver(16)
- Artan, Seyfettin(16)
- Hayaloğlu, Pınar(16)
- Kaya, Afşin Ahmet(16)
- Tosunoğlu, Büşra(16)
- Uysal, Ibrahim(16)
- Kurt, Kemal(15)
- Ozturk, Samet(15)
- Reis, Hatice Catal(15)
- Aksakal, Vecihi(14)
Yayınlar
- Kitap BölümüYalnız künye2022Dynamics of self-belief to fight against climate change: Evidence from European social survey
Popescu, Cristina Raluca Gh.; Kocağ, Esra Karapinar
All prominent leaders, managers, researchers, and specialists worldwide position the positive and constructive contributions for Sustainable Development Goals (SDGs) in the centre of their activities and interests due to the power that the international community holds in reaching all SDG targets and achieving a global partnership for sustainable development (SD). The focal point of this study is represented by individuals' self-belief to fight against climate change and utilizes valuable data from the European Social Survey (ESS) Wave 10 in 2020 on two main areas: the impact that large numbers of people limiting their energy use might have on climate change and the causes of climate change which could be represented by natural processes, human activity, or both. The findings show that more than half of those individuals in the sample are taking bold and transformative steps towards a better future for all choosing sustainability, being more likely to have positive attitudes about individual efforts to control climate change, centering on reducing their energy consumption.
AtıfScopus1OpenAlex1
İncele - MakaleYalnız künye2022Scopus SJRQ1Numerical studies on axially loaded doubler plate reinforced elliptical hollow section T-joints
Saria, Busra; Ozyurt, Emre
This paper presents results of numerical studies completed on unreinforced and doubler plate reinforced Elliptical Hollow Section (EHS) T-joints subjected to axial compressive loading on the brace member. Non-linear finite element (FE) models were developed using the finite element code, ABAQUS. Available test data in literature was used to validate the FE models. Subsequently, a parametric study was carried out to investigate the effects of various geometrical parameters of main members and reinforcement plates on the ultimate capacity of reinforced EHS T-joints. The parametric study found that the reinforcing plate significantly increases the ultimate capacity of EHS T-joints up to twice the capacity of the corresponding unreinforced joint. The thickness and length of the reinforcing plate have a positive effect on the ultimate capacity of Type 1 joints. This study, however, found that the capacity of Type 1 orientation is not dependent on the brace-to-chord diameter ratio. As for type 2 orientations, the thickness and length of the reinforcement have a minimal effect on the ultimate capacity. A new design method is introduced to predict the capacity of the reinforced EHS T-joints Type 1 and 2 based on the multiple linear regression analyses.
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İncele - Derleme MakaleYalnız künye2022Scopus SJRQ1Comprehensive review on distributed maximum power point tracking: Submodule level and module level MPPT strategies
Başoğlu, Mustafa Engin
Maximum power point tracking (MPPT) procedure in photovoltaic (PV) systems can be realized with many different methods. Especially in arrays consisting of PV modules (PVMs) connected in series; the maximum power point (MPP) may change due to partial shading conditions (PSC), aging, degradation, fabrication production differences etc. In addition, even in small power systems containing a single PVM, the difference in shading and irradiation between submodules affects the maximum power potential of the PVM. In this study, power electronics-based power processing methods in distributed MPPT (DMPPT) systems are emphasized. Power electronics-based hardware MPPT solutions are examined in two groups as full power processing (FPP) and differential power processing (DPP). In addition, commercially available power optimizers have been examined under many criteria. The literature on the subject has been analyzed in a broad perspective, and it has been comprehensively evaluated according to criteria such as power processing level, converter configuration, MPPT algorithm, MPPT application level and control approaches. This study is an important guide for scientists and hardware engineers doing academic studies on the subject. This study, which examines the topologies and control approaches used in application-oriented studies, has the feature of triggering future studies. The features that commercial power optimizers should have and the examination of the products in the market within the framework of some criteria is one of the original aspects of the study. It is expected that this study will contribute to the PV industry in building applied and building integrated studies, where extreme shading scenario occurs.
AtıfScopus62WoS41OpenAlex56İncele - MakaleYalnız künye2022Scopus SJRQ1Investigation of physiological and psychological effects of robotic cat and betta fish therapies in hemodialysis patients: A randomized controlled study
Demirağ, Hatice; Hintistan, Sevilay
Aims: This randomized controlled study was conducted to investigate the physiological and psychological effects of pet therapy in hemodialysis patients. Background: Pet therapy has both physiological and psychological effects on individuals with chronic diseases. However, to the best of our knowledge, no studies have examined the physiological and psychological effects of pet treatment in hemodialysis patients worldwide. Design: A randomized controlled study. Methods: The study was completed with 18 robotic cats, 18 Betta fish, and 18 control group patients. The data were collected at XXX State Hospital between May and September 2021 using data collection tools. Robotic pet treatment was applied to the robotic cat group for 20 min a week for two months during hemodialysis. The Betta fish group was allowed to keep Betta fish at home for two months, and they were followed for another two months. The data were evaluated in the Statistical Package for Social Sciences 23.0 package program. The study was registered on Clinical Trials (NCT05339711). Results: During robotic cat therapy, patients' loneliness and dialysis symptoms decreased, and happiness and treatment adherence to the end-stage renal disease (ESRD) increased; In the post-test follow-up, in the first measurement, the treatment adherence to the ESRD decreased, the loneliness and dialysis symptoms increased, the happiness did not change; In the second measurement of the post-test, happiness, and treatment adherence to ESRD decreased, loneliness and dialysis symptoms increased. During Betta fish therapy, patients' body mass index, happiness, and treatment adherence to ESRD increased, loneliness and dialysis symptoms decreased; in the first measurement, and loneliness, dialysis symptoms, body mass index, and treatment adherence to the ESRD increased; In the second measurement, loneliness, dialysis symptoms increased, body mass index and happiness decreased. Conclusions: The study revealed that Robotic cat and Betta fish therapies had positive physiological and psychological effects in hemodialysis patients, and these effects were different from each other.
AtıfScopus12WoS11OpenAlex12
İncele - MakaleYalnız künye2022Scopus SJRQ1Alleviating the Impact of the Barriers to Circular Economy Adoption Through Blockchain: An Investigation Using an Integrated MCDM-based QFD With Hesitant Fuzzy Linguistic Term Sets
Erol, Ismail; Murat Ar, Ilker; Peker, Iskender; Searcy, Cory
Despite its clear potential to contribute to sustainability, there are many challenges to adopting circular economy (CE). These barriers impede the implementation of CE; however, research to address them is ongoing. For example, novel technologies have become a key enabler for easing the impact of CE adoption barriers. Blockchain is one disruptive technology that has the potential to address some of those barriers, notably technological, organizational, and ecological. Blockchain is particularly well suited to help address supply chain-oriented barriers to CE adoption. However, a review of the literature shows that while there are a limited number of conceptual studies that address the capabilities of blockchain to alleviate the impact of the barriers to CE, no previous study has focused on this vital subject using a decision tool based on expert data. To this end, this paper proposes an integrated decision framework involving Multi-Criteria Decision-Making (MCDM)-based Quality Function Deployment (QFD) method with Hesitant Fuzzy Linguistic Term Sets (HFLTS) to investigate the true potential of blockchain to address the CE adoption barriers. Our findings indicate that enhanced supply chain traceability management, improved collaboration and coordination in supply chain ecosystems, building higher levels of trust in supply chain ecosystems, and enhanced business models are the most significant functions of blockchain to help overcome the CE adoption barriers.
AtıfScopus97WoS88OpenAlex102İncele - MakaleYayıncıda açık erişim2022Scopus SJRQ2Producing maximally entangled Bell type states in an efficient way for quantum teleportation
Çelik, Necati; Ünal, Nüket
In quantum teleportation, the sender must interact her/his qubit to one of the qubits in a maximally entangled Bell/Bell-type state and as a result, a joint state is obtained. This joint state has to be rearranged in terms of the appropriate number of Bell/Bell-type states. Then the sender measures her/his qubits and sends the results via a classical channel to the receiver. According to the outcome of the measurement results, the receiver applies appropriate gates to the qubits in her/his share to recover the teleported state. Perhaps the most important step in this protocol is to be able to rewrite the joint state in terms of the appropriate number of Bell-type states. An efficient way to produce Bell-type states for quantum teleportation of an arbitrary n-qubit state is proposed. Quantum teleportation of an arbitrary three-qubit state is studied as an example.
AtıfScopus1WoS1OpenAlex2İncele - MakaleYalnız künye2022Scopus SJRQ2The two-way perspective of tourism undergraduates towards (post-)viral world: The future of tourism, and vocational development and career
Seyitoğlu, Faruk; Atsız, Ozan; Kaya, Fazıl; Taş, Sedat
This timely paper explores the future of tourism and vocational career in the Covid-19 period from the perspective of undergraduate tourism students. The data were collected through semi-structured interviews with 30 students majoring in tourism faculty departments following the qualitative methodology. The findings demonstrate that vocational development and career planning in the Covid-19 era and the future of tourism are the main dimensions identifying students’ perspectives. The vocational and psychological pandemic effects are shaping the future career decisions of students. Furthermore, the future of tourism includes the elements related to tourist expectations and behaviours and trends in the (post-)viral tourism.
AtıfScopus23WoS16OpenAlex25İncele - Kitap BölümüYalnız künye2022Digital Marketing and Digital Marketing Applications in the Asian Tourism Industry
Polat, Eray
Technology takes the place more and more in human life and directs it. Therefore, it is no longer possible to imagine that marketing, which has a fundamental goal to meet the needs and desires of people, is independent of the technology that has entered such human life. The primary objective of this section is to provide a conceptual framework for digital marketing, which has become increasingly pronounced in recent years. By doing so, the evolution of the marketing mix and digital marketing practices is discussed in particular. The second important objective in this section is to present examples of digital marketing practices carried out by tourism enterprises in Asian countries. When the relevant literature is examined, it can be said that in the context of the Asian tourism industry, this area is left under-researched. In this context, secondary data, generated from the existing literature, were used to collect data. Findings show that digital marketing applications in Asian countries are not yet implemented sufficiently and need to be developed. This issue will be more important for the Y and Z generation tourists who are more deeply related to technology as it is important today.
AtıfScopus7OpenAlex5İncele - MakaleYalnız künye2022Scopus SJRQ2Chemical Composition and Antimicrobial Properties of Essential Oils Obtained from the Resin of Picea orientalis L.
Öz, Mehmet
This study aims to evaluate the chemical composition and antimicrobial (antibacterial and antifungal) properties of the essential oil subtracted from the oleoresins, which were obtained from the stem of the Picea orientalis naturally grown in Turkey. The essential oil of the resin was obtained through the hydrodistillation method in a Clevenger type device, and it was analyzed with GC-MS/FID. The structure of 74 compounds that were found in the essential oil was elucidated by comparing with literature data and the database in the appliance. Limonene (53.40%), β-pinene (20.74%) and α-pinene (14.51%) were determined to be the major components. The highest class of compounds in resin essential oils was identified as monoterpene hydrocarbons. The antimicrobial activity of the essential oil was investigated with the agar well diffusion method against 25 microorganisms, including 13 gram-negative, 7 gram-positive bacteria and 5 yeast-molds. As the results of the analysis, the highest antibacterial activity was recorded against S. typhimurium from gram-negative bacteria with inhibition zone ranging as (13.70±0.10-9.70±0.10 mm) and S. aureus from gram-positive bacteria with inhibition zone ranging as (9.30±0.10-6.80±0.10 mm). Additionally, the highest antifungal activity was obtained against C. albicans from yeast-molds with inhibition zone ranging as (10.10±0.10-6.10±0.10 mm).
AtıfScopus10WoS6OpenAlex6İncele - MakaleYalnız künye2022Scopus SJRQ1The role of household demographic factors in shaping transportation spending in Turkey
Coruh, Emine; Urak, Faruk; Bilgic, Abdulbaki; Yen, Steven T.
Factors at the family scale, for which dynamic decisions and proper investments need to be made at the national level in curbing greenhouse gas emissions, are extremely important for policymakers and investors. We provide information on the roles of how household demographic factors shape transportation patterns and spending in Turkey using the latest survey data collected by the Turkish Statistical Institute (TSI). Alternative sample selection models are estimated to accommodate censoring in expenditure, and the dependent single-hurdle model is found to be the preferred model as a result of model specification tests. Also, different specification tests conducted, including the error-independence test, resulted in rejection of the null hypothesis. Results suggest that the majority of the household economic and sociodemographic characteristics are important determinants of both the probability and level of transportation expenditure. Policy recommendations to curb carbon emissions and integrate environmentally friendly transport systems throughout the country are presented.
AtıfScopus5WoS5OpenAlex8İncele - MakaleYalnız künye2022Scopus SJRQ4Complementary and Alternative Medicine Used by Adolescents in Premenstrual Syndrome. A Cross-Sectional Study
Elkoca, Ayşe; Kahraman, Beliz Yekeler; Ozcan, Handan; Aydin, Muhammet Ali; Karakas, Sevda
Study Objectives: This study was conducted to determine the treatment methods used by adolescents with premenstrual syndrome. Premenstrual syndrome is a common disorder among women of childbearing age. It influences women’s quality of life and economic and social performance. In addition to the conventional treatments by modern medicine, women frequently prefer complementary and alternative medicine practices to cope with the problem. Methods: Quantitative and descriptive design study and 367 people were icluded in this study. A questionnaire consisting of three parts was used to collect the data. The first part includes sociodemographic characteristics and information about the menstrual cycle, the second part is the “Premenstrual Syndrome Scale”, the third part is the “Complementary and Alternative Medicine Scale (CAMS)”. Results: 43.3% of the participants had a family history of PMS, and 64.9% had regular menstrual cycles. 23.2% consulted a physician for their complaints, 10.9% used medication for their complaints. The most preferred complementary and alternative medicine herbal supplementary was green tea (49.5%), chamomile (32.5%), sage (23.8%), and thyme (18.6%). The most used mind-body practices are prayer (65.5%), exercise (54.4%), and namaz (32.4%). Conclusion: It is concluded that 73% of adolescents diagnosed with premenstrual syndrome used complementary and alternative medicine practices, so it is necessary to investigate their effectiveness.
- MakaleYalnız künye2022Scopus SJRQ3Hexarotor Yaw Flight Control with SPSA, PID Algorithm and Morphing
Kose, Oguz; Oktay, Tugrul
In recent years, the interest in unmanned aerial vehicles (UAV) has increased. They have penetrated into all areas of life. However, studies on UAV control have been a frequently discussed topic by researchers. In this study, a hexarotor in which yaw flight is tried to be controlled by changing the arm lengths during flight (morphing) is discussed. The hexarotor mathematical model is linearly derived using Newton's equations of motion. The equations of motion are modeled using the state space model approach. Hexarotor has been drawn in Solidworks program in accordance with the reality of all morphing states. Morphing estimation and accordingly proportional-integral-derivative (PID) coefficients were estimated using Simultaneous Perturbation Stochastic Approximation (SPSA). SPSA was preferred because it converged to the optimum result faster than similar algorithms. Hexarotor simulations were performed in Matlab/Simulink environment. Hexarotor yaw flight stability was achieved by minimizing the SPSA generated cost function based on design performance criteria. The cost function converged in 3-4 iterations and approached the optimum result. Accordingly, the design performance criteria have also improved and successfully followed the given trajectory.
AtıfScopus24İncele - Kitap BölümüYalnız künye2022Creating Loyal Customers with Digital Marketing Applications: The 5A Model
Polat, Eray
As a result of the effects of the digital revolution, it became very difficult for brands to attract the attention of consumers, to sustain this, and to eventually turn them into loyal customers. In this context, the primary purpose of the chapter is to examine how the brand-customer interaction is realized in the way of creating loyal customers with digital marketing activities. The secondary important goal in this section is to provide examples of digital marketing practices carried out by tourism companies in Asian countries to create loyal customers. Also in this section, which subcultures are more important in terms of digital marketing and what are the basic skills that businesses should have in building loyalty in the digital age. When the relevant literature is examined, it can be said that in the context of the Asian tourism industry, this area is left under-researched. In this context, secondary data, generated from the existing literature, were used to collect data. According to the results obtained, Kotler, Kartajaya, and Setiawan (2017)’s 5A (Awareness, Appeal, Ask, Act and Advocacy) model, developed instead of the AIDA (Attention, Interest, Desire and Action) model, consisting of aware, appeal, ask, act, and advocacy stages can be proposed as an important model that can integrate the developments in the digital age into brand-customer interaction. While the subcultures that businesses should focus more on attaining loyal customers are youths, women, and Internet citizens (netizens), the basic skills that businesses should have can be expressed as automation, proactive personalization, contextual interaction, and innovation. It is observed that the activities carried out by the tourism companies in Asian countries to create a loyal customer base are concentrated on the loyalty programs in general. It can be said that these programs, which bring various monetary rewards to users, are also integrated with digital technologies. Besides, it has been observed that businesses concentrate more on aware and appeal stages. However, to obtain a loyal customer group more easily in the digital age, businesses need to carry out activities that may attract the attention of consumers during the ask, act, and advocacy stages.
AtıfOpenAlex1İncele - MakaleYalnız künye2022Scopus SJRQ2An Investigation of the Antiproliferative Effect of Rhododendron luteum Extract on Cervical Cancer (HeLa) Cells via Nrf2 Signaling Pathway
Turan, Ibrahim; Demir, Selim; Yaman, Serap Ozer; Canbolat, Deniz; Mentese, Ahmet; Aliyazicioglu, Yuksel
The aim of the present study was to investigate the role of Rhododendron luteum extract (RLE) in the induction of Nrf2‑related oxidative stress and endoplasmic reticulum (ER) stress in human cervical cancer (HeLa) cells. The antiproliferative effect of RLE on HeLa and fibroblast cells was determined using the MTT assay. The effects of RLE on the cell cycle, apoptosis, and production of reactive oxygen species (ROS) in HeLa cells were evaluated using fluorescent probes. The mRNA expression levels of Nrf2 [and its targets glutamate-cysteine ligase catalytic subunit (GCLC), and glucose-6-phosphate dehydrogenase (G6PD)], and C/EBP homologous protein (CHOP, an ER stress marker were determined using reverse transcription‑quantitative polymerase chain reaction (RT-PCR). The results demonstrated that RLE exhibited a selective cytotoxic effect (2.9-fold) on HeLa cells compared to fibroblast cells. RLE arrested the cell cycle at the S phase, and induced apoptosis, ER stress, and ROS formation. In addition, RLE significantly suppressed the expression levels of Nrf2, GCLC and G6PD (0.65, 0.69, and 0.54-fold, respectively) and increased the expression of CHOP (4.48-fold) in HeLa cells at 72 h of treatment (p < 0.05). These results show that the antiproliferative effect of RLE occurs through the Nrf2 and ER stress pathways, and the results should now be supported by further in vivo studies.
AtıfScopus15WoS15OpenAlex13İncele - MakaleYalnız künye2022Scopus SJRQ3The relationship between banks’ credit quality, credit growth and social capital: evidence from Turkish banking sector
Pilatin, Abdulmuttalip; Ayaydin, Hasan
The aim of this study is to empirically examine the relationship between credit growth, credit quality and social capital of all commercial banks operating in Turkey for a period of twelve years between 2007 and 2018 on the basis of 81 provinces. In order to measure social capital on a provincial basis, the independent variable SC1 was obtained by applying principal component analysis to the variables consisting of 2 network and 2 norm variables. In addition, province-based organ donation rate was used as an alternative social capital variable. Changes in Total Loans (ΔTL), Changes in Real Estate Loans (ΔREL), Changes in Commercial and Industrial Loans (ΔCIL), Changes in Construction Loans (ΔCL), Changes in Non-Performing Loans (ΔNPL), Ratio of Non-Performing Loans to Total Loans (NPL/TL) and Ratio of Non-Performing Loans to Total Assets (NPL/TA) were determined as the dependent variable. The relationship between the level of social capital (SC1) and seven dependent variables on a provincial basis in Turkey was analyzed and measured using panel data techniques. The results of the analysis show that the relationship between the social capital level of the provinces, credit growth and non-performing loans are negative and significant. The results of the study show that the level of social capital is important and decisive in terms of credit growth and credit risk of banks.
AtıfScopus6WoS7OpenAlex12İncele - MakaleYalnız künye2022Scopus SJRQ2Detection of damaged buildings after an earthquake with convolutional neural networks in conjunction with image segmentation
Ünlü, Ramazan; Kiriş, Recep
Detecting damaged buildings after an earthquake as quickly as possible is important for emergency teams to reach these buildings and save the lives of many people. Today, damaged buildings after the earthquake are carried out by the survivors contacting the authorities or using some air vehicles such as helicopters. In this study, AI-based systems were tested to detect damaged or destroyed buildings by integrating into street camera systems after unexpected disasters. For this purpose, we have used VGG-16, VGG-19, and NASNet convolutional neural network models which are often used for image recognition problems in the literature to detect damaged buildings. In order to effectively implement these models, we have first segmented all the images with the K-means clustering algorithm. Thereafter, for the first phase of this study, segmented images labeled “damaged buildings” and “normal” were classified and the VGG-19 model was the most successful model with a 90% accuracy in the test set. Besides, as the second phase of the study, we have created a multiclass classification problem by labeling segmented images as “damaged buildings,” “less damaged buildings,” and “normal.” The same three architectures are used to achieve the most accurate classification results on the test set. VGG-19 and VGG-16, and NASNet have achieved considerable success in the test set with about 70%, 67%, and 62% accuracy, respectively.
AtıfScopus22WoS14OpenAlex25İncele - MakaleYalnız künye2022Scopus SJRQ2Hidden Diversity in a Narrow Valley: Description of New Endemic Palearctic Rock Lizard Darevskia (Squamata: Lacertidae) Species from Northeastern Turkey
Kurnaz, Muammer; Şahin, Mehmet Kürşat; Eroğlu, Ali İhsan
Darevskia is a particularly species-rich radiation of Palearctic rock lizards from the Caucasus region. Thanks to intense systematic and taxonomic research, the knowledge of species-level diversity within this genus has increased over the last quarter century. Here, we described a new species, Darevskia salihae sp. nov. from northeastern Turkey. The new taxon is differentiated from other nearby taxon by the low number of dorsal scales in the middle of the body, the shorter body length, and the absence of blue dots both on the lateral region above the forelimbs and on the margin of the ventral plates. In addition to their morphological differences, the new taxon is phylogenetically different from close groups. It is located in a separate subclade from the rudis-valentini-portschinskii subclade. This distinction is supported by both a high bootstrap value (100) and a high posterior probability value (1.00). These two subclades are separated from each other by a genetic distance of almost 4%. This separation is supported not only genetically and morphologically, but also geographically. Since the habitat of the new taxon is limited to a high mountain and a narrow valley, it does not provide an opportunity for a different Darevskia species to shelter because it creates geographical isolation. However, Darevskia parvula that live closest to the habitat of the new taxon live only at the habitat boundaries and do not enter areas where the new taxon is found. Therefore, it might be possible that while it was separated from the rudis-valentini-portschinskii group during the evolutionary transformation, it remained as a refuge and relict in a narrow area as a result of the collapse of the valleys and the partial uplift of the Kaçkar Mountains.
AtıfScopus6WoS5OpenAlex4İncele - MakaleYalnız künye2022Scopus SJRQ1Resilient active seismic response control of structural systems
Çetin, Gökhan; Fadali, Mohammed S; Pekcan, Gökhan
This paper proposes a dissipative resilient observer and controller (DROC) design for a network controlled system (NCS) that handles faults, implementation errors, or cyberattacks that can be modeled as bounded controller or observer gain perturbations. It presents linear matrix inequality (LMI) conditions for the robust stability of the system in the presence of bounded perturbations in the observer and controller. Furthermore, a new LMI-based time-delay control (TDC) algorithm that mitigates the effects of perturbations due to time-delays in the NCS is introduced. The robust methodology is applied to active control of a scaled model of a structural system equipped with an active mass driver system. The results demonstrate that the proposed methodology is robust and ensures stable system response due to various types of earthquake base excitations.
- MakaleYalnız künye2022Scopus SJRQ1Scrutinizing blockchain applicability in sustainable supply chains through an integrated fuzzy multi-criteria decision making framework
Erol, Ismail; Ar, Ilker Murat; Peker, Iskender
Sustainability has become increasingly important over the last three decades and has proven to be a key enabler for constructing resilient supply chains. Customers who want their products to be authenticated for sustainability put pressure on Original Equipment Manufacturers and suppliers to become more sustainable on a global scale. Moreover, social sustainability issues have become more challenging to address, and a growing number of stakeholders put emphasis on societal concerns. To this end, decision-makers are becoming increasingly interested in applying disruptive technologies to address societal, environmental, and economic concerns and accomplish sustainability goals. Researchers argue that disruptive technologies such as blockchain may be implemented to assist supply chains towards building sustainability. However, our literature analysis concluded that existing research has not quantitatively examined the critical functions of sustainable supply chain (SSC) for blockchain applicability using a decision framework. Therefore, this research, through Fuzzy SWARA-COPRAS-EDAS and COPELAND-based framework, is aimed at investigating the most feasible functions of a SSC for potential blockchain implementations. Using this framework, the critical functions of a SSC were ranked against the benefits of blockchain. The findings of this study implied that while sourcing, delivery, transformation and product recovery proved to be the most appropriate functions of SSCs for blockchain applications, customers and product use was the least feasible one. This study aids decision-makers in gaining a more thorough understanding of where in a SSC blockchain may create additional value.
AtıfScopus60WoS49OpenAlex62İncele - MakaleYalnız künye2022Angular Momentum Control for Preventing Rollover of a Heavy Vehicle
Ünker, Faruk
In this article, gyroscopes and flywheels are used to prevent the rollover of a vehicle due to external forces. The rollover preventing performance of the flywheels for a heavy trailer (an inverted pendulum problem) is investigated at a high road bank angle risk. Two control moment gyroscopes (CMG) and a reaction wheel are controlled by proportional torques to keep the vehicle in a stable motion in the vertical position. The reaction wheel was used only to eliminate the dissipation energy of damper. By using the energy stored in the flywheels of gyroscopes, the sprung mass of a vehicle can make a stable oscillating motion of small amplitude, standing upright without tipping over. The optimum flywheel speed was derived from the frequency equations with the appropriate controller gain. Most importantly, the required angular momentum to keep the vehicle upright without tipping over depends on the amplitude of the gimbal oscillation and the frequency. It has also been observed that Matlab simulations of Lagrangian equations and simulations modeled in RecurDyn software are in perfect harmony.
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