Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Uzun, Sevda(77)
- Merdan, Mehmet(73)
- Duran, Celal(54)
- Ozdes, Duygu(50)
- Baltaci, Cemalettin(45)
- Kaygusuz, Abdullah(45)
- Kulakaç, Nurşen(39)
- Ashyralyyev, Charyyar(38)
- Karsli, Orhan(37)
- Demir, Selim(36)
- Öztürk, Serkan(36)
- Dokuz, Abdurrahman(35)
- Turan, Ibrahim(35)
- Araz, Onur(33)
- Kandemir, Raif(31)
- Sipahi, Ferkan(30)
- Topal, Fevzi(30)
- Kurt, Kemal(28)
- Peker, Iskender(28)
- Arslan, Mehmet(27)
- Baltacı, Cemalettin(27)
- Maden, Nafiz(27)
- Ozturk, Samet(27)
- Aydin, Aydanur(26)
- Vural, Alaaddin(26)
- Bayrakdaroglu, Serdar(25)
- Kurnaz, Muammer(25)
- Reis, Hatice Catal(25)
- Akar, Zeynep(24)
- Aydin, Faruk(24)
- Gücer, Mehmet Ali(24)
- Topal, Meryem(24)
- Yolcu, Halil(24)
- Yücel, Cem(24)
- Anaç, Halil(23)
- Kankal, Murat(23)
- Ürkek, Bayram(23)
- Aliyazicioglu, Yuksel(22)
- Günen, Mehmet Akif(22)
- Tuncer, Metin(22)
Yayınlar
- MakaleAçık Erişim2024Scopus SJRQ2Effects of Electro-Muscle Stimulation Exercise Combined with Mat Pilates on Pain, Anxiety, and Strength in Sedentary Females with Fibromyalgia: A Single-Blind Randomized Controlled Trial
Eseoğlu, İsmail; Yılmaz, Ali Kerim; Anıl, Berna; Korkmaz, Esra; Akdemir, Enes; Yılmaz, Coşkun; Kehribar, Lokman; Aydın, Nur Gökçe; Ermiş, Egemen; Yoldaş, Burak
Background and Objectives: Fibromyalgia syndrome (FM) is a chronic pain disorder that is ranked as one of the four most common rheumatological diseases in the world. This study aims to investigate the effects of an eight-week mat Pilates and electro-muscle stimulation (EMS) with combined mat Pilates exercises on pain, depression, anxiety, and strength in sedentary women. Methods: This study is a single-blind randomized controlled trial. A total of 30 sedentary female patients (Pilates (n = 15), EMS (n = 15)) diagnosed with FM were included in the study. The patients were subjected to Beck Depression (BDIs) and Anxiety Inventories (BAIs); a Fibromyalgia Impact Questionnaire (FIQ); five different Single-Leg Hop Tests (SLHTs); modified push-up (MPU), Handgrip Strength (HGS), Deep Squat (DSQ), V-Sit Flexor, bent-arm hang (BA), sit-up and Biering-Sørensen tests; and anthropometric tests before and after the 8-week exercise program. Results: The eight weeks of mat Pilates exercises combined with mat Pilates and EMS revealed significant results (p < 0.05) in anthropometric data (abdomen, lower abdomen, hips) (p < 0.05) except for the results of chest circumference measurements (p > 0.05). In addition, there were statistically significant positive results in BDIs, BAIs, FIQs, lower extremity (all SLHTs and DSQ), upper extremity (MPU, HGS, BA), and core (V-SIT, sit-up, Biering-Sørensen test) strength test findings (p < 0.05). Conclusions: Combining the mat Pilates exercises with EMS is an effective and reliable method to improve the pain, anxiety, depression, and strength of female patients diagnosed with FM.
AtıfScopus4WoS3OpenAlex4
İncele - MakaleYayıncıda açık erişim2024Scopus SJRQ1HIJACKING OF STATE POWER ON RELIGIOUS FREEDOM BY COMMUNITY ORGANIZATIONS IN INDONESIA
Prianto, Andi Luhur; Karimullah, Suud Sarim; Idri; Ibrahim, Zumiyati Sanu; Nugraha, Aat Ruchiat; Gönan, Yavuz
This study aims to reveal the failure of the state to use its authority to ensure the fulfilment of religious freedom for all its citizens maximally and adequately because, in practice, the state sometimes takes refuge behind the slogan of neutrality when it sees the majority group committing violent practices against minority groups. This study uses a discourse analysis method with a phenomenological approach to understanding the meaning of various events and human interactions. Meanwhile, the data was collected through literature study, media study, and observation using content analysis and discourse analysis methods in processing the data. Then this research results in the finding that opening the state accommodation gap to the demands of the majority religious group will provide space for them to take advantage of the similarities in their religious ideology with state actors and then attempt to dictate state policy. The inability of the state to be neutral in solving the problems of its people, at the same time, has given rise to the impression that a handful of certain social classes have controlled the state. Even this research results also show that tendencies of intolerance and discrimination arise in the community.
AtıfScopus5OpenAlex3İncele - MakaleYalnız künye2024Scopus SJRQ2Selective Hydrogenation of Croton Aldehyde on Pt Nanoparticles Controlled by Tailoring Fraction of Well-Ordered Facets Under Different Pretreatment Conditions
Sarıbıyık, Oğuz Y.; Resasco, Daniel E.
This study focuses on the influence of pretreatment conditions and surface structures of well-tuned Pt nanoparticles on the selective hydrogenation of α-β unsaturated crotonaldehyde. The surface binding site preferences of the reactant during catalytic conversions are strongly influenced by the configuration of the nanoparticles’ surface fraction exposed. Since the orientation of the well-ordered surfaces are significantly affected by the pretreatment conditions, we have attempted to obtain relationships between morphology changes and catalytic activity by controlling the fraction of facets with ordered structures. Pt nanoparticles exhibit different types of exposed surfaces, namely Cubic (Cub) (100) and Cuboctahedra (CubOc) (111) + (100). These different surface structures play a crucial role in the preferential hydrogenation of the model molecule. Additionally, we investigated the impact of the pretreatment condition on the catalytic selectivity of the well-shaped nanoparticles. We employed various techniques such as high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), transmission electron microscopy (TEM), and room temperature carbon monoxide adsorption Fourier transform infrared spectroscopy (RT-CO-FTIR) to determine the reconstructions of the particles under different pretreatment conditions. The results indicate that both the well-ordered surface fraction and pretreatment conditions of Pt nanoparticles had a moderate influence on both catalytic activity and selectivity. Overall, this study highlights the importance of analyzing the surface morphology and pretreatment conditions of nanoparticles in order to optimize catalytic activity and selectivity in reactions involving well-tuned surface structures. Graphical Abstract: (Figure presented.).
AtıfScopus4WoS5OpenAlex5İncele - MakaleAçık Erişim2024Scopus SJRQ1The role of brand identity, brand lifestyle congruence, and brand satisfaction on repurchase intention: a multi-group structural equation model
Acar, Ayşegül; Büyükdağ, Naci; Türten, Burak; Diker, Ersin; Çalışır, Gülsüm
This study investigated the relationship between brand identity, brand lifestyle congruence, brand satisfaction, and repurchase intention. In addition, this study examined how the primary reference group’s family and peer/friend affected individuals’ perceptions of brand identity, brand-lifestyle congruence, brand satisfaction, and purchase intention through a multi-group structural equation model. A total of 610 valid and useable responses, collected from a social media channel, were analyzed. Grounded in social identity theory and self-congruity theory, a set of hypotheses was examined within a research model. The findings show that brand identity significantly affects brand lifestyle congruence, brand satisfaction, and repurchase intentions. In addition, brand-lifestyle congruence significantly affects brand satisfaction and repurchase intentions, with brand satisfaction also significantly affecting purchase intentions. Also, high-income and elderly consumers tend to ignore the family and peer effects. Middle-aged, middle-income men who value product origin show a strong brand perception, and are less influenced by family. In contrast, women, typically lower-income and price-focused, are more receptive to family and peer effects and generally indifferent to product origin. This research advances brand identity literature by examining the effects of brand brand-lifestyle congruence, brand satisfaction, and purchase intention. It suggests that the synergy between brand identity, brand lifestyle congruence, and brand satisfaction significantly enhances repurchase intentions. Besides, examining profiles in the context of brands, consumers, and reference groups contributes additional value to the field.
AtıfScopus36WoS30OpenAlex43İncele - MakaleAçık Erişim2024Scopus SJRQ1The impact of surgical intervention on religious coping, psychological well-being, and pain levels in older adult patients: A quasi-experimental study
Daştan, Buket; Kulakaç, Nurşen
Aim: This study aimed to determine the impact of surgical intervention on religious coping, psychological well-being, and pain levels in older adult patients. Method: The data of the study, which used a one-group pretest-posttest quasi-experimental design without a control group, was collected between July 1, 2023, - January 30, 2024. Data collection involved the use of a Personal Information Form, the Religious Coping Scale, the Psychological Well-Being Scale, and the Visual Analog Scale. Results: The results revealed a significant increase in psychological well-being and positive religious coping after surgical intervention compared to presurgical levels (p < 0.001). Multiple linear regression analysis revealed that male gender, younger age, enhanced psychological well-being, and positive religious coping were identified as factors contributing to a reduction in postsurgical pain levels. Conclusion: The study's results indicate that surgical intervention serves as a significant variable influencing psychological well-being and religious coping among older adult patients.
AtıfScopus2WoS1OpenAlex2İncele - MakaleAçık Erişim2024Scopus SJRQ3DEVELOPING A MODEL SOFTWARE TO DETERMINE THE EFFECT OF HIGH VOLTAGE TRANSMISSION LINES (HVTL) ON THE RESIDENTIAL LAND VALUE BY USING AHP METHOD
Marabaoğlu, Seda Nur; Uzun, Bayram
Due to High Voltage Transmission Lines (HVTL), easement expropriation is made and an easement price (compensation) is paid to the property owner. Since there is not a standard method, this price is calculated inappropriately and inaccurately. Therefore, either the property owner or the government suffers material damage. The main objective of this study is to determine the impact of HVTL factors on property value using the Analytical Hierarchy Process (AHP) method. Additionally, within the scope of the study, the aim is to develop a software model that automatically detects impairment rate and easement prices. In the study, a total of 79 individuals from 21 different countries participated in the national and international survey. The weights of the factors were determined using the AHP. A model software was created by integrating the weight values and the interface software of the model was created. The model software was tested with sixty expert reports prepared by different experts collected from ten different provinces. The rate of error in the expert reports was found to be at least 0.38% and at most 84.98%. With this software, an appraisal standard that will largely eliminate the existing injustices in the determination of the easement price will be provided. In addition, the inconsistencies between the expert reports of similar parcels and easements will be reduced, and easement prices will be paid fairly.
AtıfScopus2WoS1OpenAlex1İncele - MakaleAçık Erişim2024Scopus SJRQ1The relationship between the psychological resilience levels and ruminative thought styles of nurses providing care for earthquake victims: 2023 earthquake in Kahramanmaraş, Türkiye
Çobanoğlu, Asuman; Oğuzhan, Hatice
Traumatic cases experienced during earthquakes, which are considered among acts of God, may cause multiple and severe impacts on healthcare professionals. This research aimed to examine the ruminative thought styles and psychological resilience level of nurses who provided care services to the victims after the earthquake that struck Kahramanmaraş, Türkiye on February 6-7th. This descriptive and correlational study was conducted with 225 nurses. Research data were collected using the Personal Information Form, Ruminative Thought Style Questionnaire and Brief Resilience Scale. A negative and moderate relationship was determined between the psychological resilience level of nurses and their ruminative thought style (r = -0.477, p < 0.05). The psychological resilience level of nurses who received training on disasters and psychological resilience was determined to be higher whereas their ruminative thought tendency was lower (p < 0.05). It was determined that the ruminative thought style of the nurses decreased as their psychological resilience level increased. Trainings on disaster nursing and aiming to increase the psychological resilience level may be recommended in order to improve the psychological resilience of nurses.
AtıfOpenAlex2İncele - MakaleYayıncıda açık erişim2024Scopus SJRQ1Potato leaf disease detection with a novel deep learning model based on depthwise separable convolution and transformer networks
Catal Reis, Hatice; Turk, Veysel
Early diagnosis of plant diseases is essential in reducing economic losses for farmers and increasing production efficiency. Therefore, Computer-Aided Diagnosis (CAD) systems supported by artificial intelligence technologies can be developed to help diagnose diseases quickly and accurately by examining the symptoms and signs in plant leaves. In this study, Multi-head Attention Mechanism Depthwise Separable Convolution Inception Reduction Network (MDSCIRNet) architecture, an image-based deep convolutional neural network, is proposed for classifying potato leaf diseases. The main components of the MDSCIRNet architecture are depthwise separable convolution (DSC) and a multi-head attention mechanism. The proposed architecture has been compared with modern algorithms developed with DSC technology, such as Xception, MobileNet, and deep learning algorithms, such as ResNet101, InceptionV3, and EfficientNetB2, to evaluate its performance in the classification process. In addition, hybrid methods developed with the classical machine learning algorithms Support Vector Machine (SVM), Logistic Regression (LR), Random Forest (RF), Adaptive Boosting (AdaBoost), and MDSCIRNet model, integrated deep learning model, hard voting ensemble learning model. Suggested methods such as these were also used in the experimental process. Moreover, techniques such as Contrast Limited Adaptive Histogram Equalization (CLAHE), Enhanced Super-Resolution Generative Adversarial Networks (ESRGAN), and Hypercolumn were used to improve the image quality of the data set. In the experimental process, the MDSCIRNet deep learning architecture achieved 99.24% accuracy in the study using the original dataset. While a 99.11% accuracy rate was achieved with the integrated deep learning model and hard voting ensemble learning model, the highest success rate of 99.33% was performed in the study conducted with the MDSCIRNet + SVM method. This study contributes to developing new and effective strategies in the agricultural industry for the early diagnosis and control of potato plant diseases. Machine learning-based approaches offer the potential to minimize economic losses and increase productivity in production by allowing farmers to intervene early.
AtıfScopus111WoS75OpenAlex83İncele - MakaleAçık Erişim2024Scopus SJRQ1The effect of psychotherapeutic interventions on posttraumatic stress disorder symptoms, depression and self-esteem in women exposed to violence: a systematic review and meta-analysis
Emirza, Elif Güzide; Uzun, Sevda
This study aimed to reveal the level of effect of psychotherapeutic interventions on post-traumatic stress disorder symptoms, depression, and self-esteem in women who had been exposed to violence. For this systematic review and meta-analysis study, PubMed, Web of Science, EBSCOhost, Google Scholar, and YÖK Thesis Center databases were searched without any year limitation in August-December 2022, and 28 studies were included. The data were synthesized using meta-analysis and narrative methods. This systematic review and meta-analysis found that psychotherapeutic interventions for women exposed to violence were effective on post-traumatic stress disorder symptoms in individuals (SMD: -0,590, %95 CI: -0,893- 0.196; Z= -2,937, p = 0.003, I2= %93,59). Psychotherapeutic interventions had a significant effect on women’s depression levels in favor of the intervention group, and there was high heterogeneity between the studies (SMD: -0,475, %95 CI: -0,838- 0.113; Z= -2,569, p = 0.010, I2= %90,68). Subgroup analyses showed that cognitive behavioral therapy was effective in the treatment of intimate partner violence. It was also found that psychotherapeutic interventions did not affect women’s self-esteem levels. Psychotherapeutic therapies for women who have experienced violence have a favorable impact on them and improve their mental health.
AtıfScopus6WoS4OpenAlex6İncele - MakaleYalnız künye2024Scopus SJRQ2The effect of anthropometric measurements and muscle endurance of the trunk and lower extremities on anatomic body awareness in healthy individuals with different levels of physical activity
Koca, Rabia; Şen, Müşerref Ebru
Background: The interaction between anthropometric measurements and muscular endurance and how these factors manifest in anatomical body awareness have not yet been fully investigated. It was aimed to examine the relationship between physical activity, body anthropometric measurements and endurance and anatomical body awareness in healthy individuals. Materials and methods: A total of 217 individuals aged 19–40 participated in the study. Participants were categorized into inactive (n = 65), minimally active (n = 80), and sufficiently active (n = 72) groups based on the international physical activity questionnaire (IPAQ). Anthropometric measurements including shoulder, abdomen, waist, and hip circumferences were taken. Participants’ trunk muscle endurance and lower extremity endurance was assessed through various tests. Anatomic body awareness was evaluated using the Body Awareness Questionnaire (BAQ) with established validity. Results: While no significant difference in shoulder circumference measurements was found between the inactive and minimally active groups (p > 0.05), the sufficiently active group showed significantly higher shoulder circumference measurements compared to the other groups (p < 0.05). Significant differences were observed among all endurance tests between the groups (p < 0.05). Participants’ body endurance increased significantly with higher activity levels. Moreover, anatomic body awareness exhibited significant variation among the three groups (p < 0.05), with the sufficiently active group having the highest level of anatomic body awareness. Positive correlations were found between all endurance tests and anatomic body awareness (p < 0.05), as well as a positive correlation between physical activity levels and anatomic body awareness (p < 0.05). Conclusion: It is suggested that physical performance and endurance increase anatomical body awareness when applied with appropriate treatment methods, can be applied for a healthier life and can be an additional application in the clinical environment.
- MakaleAçık Erişim2024Scopus SJRQ4Analysis of grover's quantum search algorithm on a classical computer: Identifying opportunities for improvement
Necati, Çeli̇K; Bi̇Ngöl, Özkan
In this paper, Grover’s quantum search algorithm is analyzed using a classical computer by calculating the amplitudes and the probabilities of finding a single marked state for n=5, 10, 15, 20, 25, and 27 qubit states. The calculations show that the marked state can be found in iterations, where N = 2n is the number of items. The possibility of improving Grover’s search algorithm to find a single item in N search elements is discussed by calculating the amplitudes and hence the probabilities of finding a single marked state for n=5, 10, 15, 20, 25, 30, 35, 40, 45, and 50 qubit states. The calculations showed that the marked state could be found with sufficiently high probability in (ln(N)) iterations. This is quite a remarkable speed-up that can be achieved to find a single marked element in an unsorted N search element. Copyright 2021, Yıldız Technical University.
AtıfScopus2WoS1OpenAlex5İncele - MakaleYalnız künye2024Scopus SJRQ2Theoretical analysis of stress-strain behavior of multi-layer RC beams under flexure
Öztekin, Ertekin
In this study, obtaining theoretical stress-strain curves and determining the parameters defining the equivalent rectangular stress block were aimed for 3 and 4-layered rectangular Reinforced Concrete (RC) cross-sections subjected to flexure. For these aims, the analytical stress-strain model proposed by Hognestad was chosen for the concrete grades (20 MPa ≤ fck≤60 MPa) used in this study. The tensile strength of the concrete was neglected and the thickness of the concrete layers in the compression zone of the concrete cross-section was taken as equal. In addition, while concrete strength was kept constant within each layer, concrete strengths belonging to separate layers were increased from the neutral axis towards the outer face of the compression zone of the concrete cross-section. After the equivalent rectangular stress block parameters were determined by numerical iterations, variations of these parameters depending on concrete strength in layers and layer numbers were obtained. Finally, some analytical equations have been proposed to predict the equivalent stress block parameters for the 3 and 4-layered RC cross-sections and validities of these proposed equations were shown by different metrics in this study.
- Kitap BölümüYalnız künye2024The effect of digitalization in healthcare on service sustainability
Köse, Asli
This research evaluates how digitalization affects the sustainability of healthcare services. To achieve this, research articles published in the PUBMED and WEB OF SCIENCE databases up to June 30, 2024, were compiled. The PRISMA guidelines were followed when presenting the research findings. In the study evaluating the impact of digitalization on healthcare sustainability, a systematic review method was employed. The systematic review addresses the question of how digitalization affects the sustainability of healthcare services. The research identified two main themes. The first theme focuses on evaluating the effects of digitalization on sustainability within hospitals, healthcare workers, and patient populations. The second theme examines the impact of digitalization on sustainability concerning societal health, health worker well-being, and the overall health system.
AtıfScopus4OpenAlex5İncele - DüzeltmeAçık Erişim2024Scopus SJRQ1Correction to: Evaluation of Spiritual Care and Well-Being Levels of Individuals Diagnosed with Lung Cancer in Turkey (Journal of Religion and Health, (2024), 63, 5, (3636-3659), 10.1007/s10943-024-02088-3)
Çakmak, Seher; Doğan, Melike Demir; Selim, Nisanur; Kalleci, Gülse Nur
In this article, the 1st and 6th paragraphs in the “Discussion” section contain several errors. The corrected paragraphs are given below. This study aimed to assess the spiritual well-being levels and spiritual care needs of individuals diagnosed with lung cancer. The findings revealed that the patients exhibited high spiritual well-being levels, with the “harmony with nature” sub dimension scoring particularly high in relation to spiritual well-being. This aligns with several studies which reported high spiritual well-being of cancer patients (Martins et al., 2020; Rabow & Knish, 2015).” The study identified high spiritual needs among the patients, with the specific subdimension “informing them about their health” obtaining the highest scores. Notably, in the current study, it was observed that patients’ needs in terms of “informing them about their health” increased, deviating from the emphasis on love, support, and bonding seen in other studies (Kırca et al., 2023; Shi et al., 2023). This divergence is thought to be linked to differences in the disease stage. The original article has been corrected.
AtıfScopus1WoS1OpenAlex1İncele - DüzeltmeAçık Erişim2024Scopus SJRQ2Correction to: Disease Burden and Sexual Life Experiences of Individuals with Chronic Obstructive Pulmonary Disease: A Phenomenological Study (Sexuality and Disability, (2024), 42, 1, (201-215), 10.1007/s11195-023-09821-y)
Uzun, Sevda; Toker, Sema; Erer, İmren
In this article the affiliation details for Author Sema Toker were incorrectly given as ‘Sundays Vocational School of Health Institutions Management Program, Dumlupinar University of Kütahya, Kütahya, Turkey’ but should have been ‘Kütahya Dumlupınar University, Pazarlar Vocational School, Kütahya, Turkey’.
AtıfWoS3İncele - MakaleAçık Erişim2024Scopus SJRQ2A new method of smoothness-constrained magnetotelluric modelling with the utility of Pareto-optimal multi-objective particle swarm optimization
Büyük, Ersin
Particle swarm optimization, one of the modern global optimization methods, is attracting widespread interest because it overcomes the difficulties of conventional inversion techniques, such as trapping at a local minimum and/or initial model dependence. The main characteristic of particle swarm optimization is the large search space of parameters, which in a sense allows the exploration of the entire objective function space if the input parameters are properly chosen. However, in the case of a high-dimensional model space, the numerical instability of the solution may increase and lead to unrealistic models and misinterpretations due to the sampling problem of particle swarm optimization. Therefore, smoothness-constrained regularization techniques used for the objective function or model reduction techniques are required to stabilize the solution. However, weighting and combining objective function terms is partly a subjective process, as the regularization parameter is generally chosen based on some kind of criteria of how the smoothing constraints affect the data misfits. This means that it cannot be completely predefined but needs to be adjusted during the inversion process, which begins with the response of an initial model. In this paper, a new modelling approach is proposed to obtain a smoothness-constrained model from magnetotelluric data utilizing multi-objective particle swarm optimization based on the Pareto optimality approach without using a regularization parameter and combining several objective function terms. The presented approach was verified on synthetic models and an application with field data set from the Çanakkale–Tuzla geothermal field in Turkey. Findings from these analyses confirm the usefulness of the method as a new approach for all constrained inversions of geophysical data without the need to combine the objective function terms weighted by a regularization parameter.
AtıfScopus2WoS2OpenAlex1İncele - MakaleYalnız künye2024Scopus SJRQ2Evaluation of Spreadable Kefir Produced from Different Milks in Terms of Some Quality Criteria
Aktaş, Haktan; Meral Aktaş, Hacer; Ürkek, Bayram; Şengül, Mustafa; Çetin, Bülent
Kefir, which has many beneficial effects on health, is one of the most consumed fermented milk products worldwide. It is important to increase consumption of the fermented product for public health. In this study, it was aimed to increase the beneficial effects of kefir on public health. Therefore, kefirs produced from different types of milk (cow, buffalo, sheep, and goat) were concentrated, and obtained spreadable kefir samples were investigated in terms of their microbiological characteristic (lactic bacilli, lactic cocci, yeasts and moulds, total bacteria, and coliform bacteria), benzoic acid content, physicochemical properties (fat, total solid, ash content, acidity, pH, syneresis, viscosity, colour, and rheological properties), and sensory characteristic. It was determined that APC, lactic bacilli, lactic cocci, and yeast counts of the concentrated kefir samples changed between 6.90 and 8.64, 6.89 and 8.61, 7.42 and 8.72, and 2.17 and 5.39 log CFU/g, respectively, during storage. Mould and coliform bacteria were not detected in the samples. The concentrated kefir samples contained benzoic acid in the range of 18.30–119.58 mg/L. Results from this study showed that type of milk caused differences on APC, lactic bacilli, lactic cocci and yeast count, total solids, ash, fat, acidity, pH, syneresis, colour, viscosity and rheological parameters, and benzoic acid content. In addition, milk type affected sensory properties of the kefirs. Concentrated kefirs produced from cow and buffalo milk were the most liked by panellists. Finally, it was determined that concentrated kefir was favoured as a new product by most of the panellists.
AtıfScopus12WoS12OpenAlex14İncele - MakaleAçık Erişim2024Scopus SJRQ2Modified REL-Based Piecewise Path Loss Modeling Approach for Shore-to-Ship Communication at 5.6 GHz
Eyuboglu, Ekrem; Hasirci Tugcu, Zeynep; Kuzulugil, Kenan; Cavdar, Ismail Hakki
The need for reliable and uninterrupted communication systems in the marine environment has become critically important with increasing maritime activities, environmental monitoring, and the spread of autonomous systems. However, the complex structure of electromagnetic wave propagation in a sea environment limits the accuracy of the existing propagation models. Thus, the Modified Round Earth Loss (REL) model was first developed in this study to estimate the path loss more accurately in shore-to-ship communication. Subsequently, a piecewise modeling approach based on the principle of two-segment data modeling was proposed. In the Modified REL model, unlike the traditional REL model, the paths and gains of the direct and reflected waves were not considered equal in the calculations. Moreover, unlike in the classical approach, the receiver height was not taken as a fixed value; the estimated best receiver height value for each measurement was included in the calculations as a representation of the effect of roughness in the sea environment. Thus, the model is better adapted to various environmental conditions. In addition, the proposed piecewise model divides the propagation medium into two regions using a break point calculated by Fresnel zone theory. The Modified REL model was used for the first region and the log-distance model was used for the second region. This method allows for more accurate modeling of signal behaviors, especially at different distances. Experimental measurements and performance evaluations conducted using four different shore-to-ship communication scenarios show that the Modified REL model shows an average improvement of up to 3% in Root Mean Square Error (RMSE) values compared to the classical REL model. Additionally, the proposed piecewise model improves the fitting error of the Modified REL model, which models the data as a single whole, by an average of 22.25%. These findings emphasize the necessity of propagation models that are sensitive and adaptable to environmental changes for maritime communication.
AtıfScopus4WoS2OpenAlex4İncele - MakaleAçık Erişim2024Scopus SJRQ3Comparison with carbonate rocks hosted iron skarn in the eastern Sakarya Zone (Gümüşhane, NE Turkey): a geomorphologic, geochemical and stable isotopic approach
Sipahi, Ferkan; Zeybek, Halil İbrahim; Gücer, Mehmet Ali; Işık, Fatih
The carbonate rocks in the eastern part of NE Turkey are situated within the Pontide paleo-magmatic arc and are frequently in contact with granitoid formations, often hosting skarn mineralization in the region. These carbonate rocks, typically found on ridges and hillsides exhibit predominant orientations along east–west, northeast-southwest, and northwest-southeast directions. A part of limestone, named as biomicrite, metamorphosed and display a saccharoidal texture. Comprised mainly of calcite, with less secondary quartz and iron oxide minerals, these carbonate rocks are classified as Fe-poor calcio-carbonate and magnesio-carbonate, having higher CaO and LOI contents. Marble and recrystallized limestone with granoblastic texture mainly comprise of calcite, less quartz, magnetite, and hematite. Marble classification diagrams suggest calcic skarn mineralization, indicated by decreasing CaO (or CO2) and increasing MgO from limestone to marble (or skarn). Strontium contents deviate slightly from the lithosphere carbonate average, while low Rb contents, attributed to skarn metamorphism, indicate the absence of K-bearing minerals. The high Al2O3/SiO2 in the carbonate rocks can points out hydrothermal activity and carbonate disengagement can indicate to actualize at temperatures that can affect Ce and Al mobilities. The low authigenic U value, low U/Th and Ni/Co ratios in carbonate rocks have been implied that protolith constituents deposited under oxic conditions. Positive Eu anomalies in limestone and marble suggest the influence of hydrothermal fluids. Carbon and oxygen isotope values in marble are similar with those of metamorphic and skarn marbles, indicating a magmatic origin. Overall, mineralogical and geochemical analyses propose a uniform source and/or geological process for all studied marbles.
- MakaleAçık Erişim2024Scopus SJRQ2Anti-inflammatory activities of some Anthemis species used in the treatment of inflammation-related diseases, GC/MS and LC-MS/MS analysis with bioactivity-guided fractionation
Yıldırım, Aybeniz; Gül, Abdulkadir; Başaran, Nihal; Şen, Ali; Bitiş, Leyla; Tanyıldızı, M.Şaban
Recent studies have focused on Anthemis sp. because of their rich chemical composition and application in the treatment of diseases associated with inflammation. The purpose of this study was to determine the active chemicals responsible for the anti-inflammatory properties of Anthemis cotula, A. tomentosa, A. austriaca, and A. tinctoria var. tinctoria. Therefore, the 5-Lipoxygenase (5-LOX) was used to assess the anti-inflammatory properties of methanol extracts that were extracted from the aerial parts of the mentioned species, with an IC50 value of 23.88 μg/mL, the methanol extract of A. tinctoria var. tinctoria demonstrated anti-inflammatory effects close to the standard (Indomethacin, IC50: 18.05 μg/mL). Compared to the other extracts, the methanol extract of A. tinctoria var. tinctoria demonstrated significantly greater anti-inflammatory activity. A. tinctoria var. tinctoria and A. tomentosa methanol extracts, which were the most active in comparison to other extracts, were fractionated using the bioactivity-guided fractionation method. Their anti-inflammatory properties were evaluated to determine the compounds responsible for the activity. With an IC50 value of 3.44 μg/mL, the ethyl acetate fraction of A. tinctoria var. tinctoria (ATiEA) was found to be the most active of all the fractions. After ATiEA was further fractionated using column chromatography, it was found that ATiEA-II, one of its sub-fractions, was more effective than other sub-fractions against the 5-LOX, with an IC50 value of 2.93 μg/mL. Furthermore, the sub-fractions' total phenol and flavonoid contents were examined to confirm their anti-inflammatory properties. The sub-fraction ATiEA-II exhibited higher total flavonoid content (743,86 μg QE/g dry weight) and total phenol content (4659.36 μg GA/g dry weight) than other sub-fractions, which was in line with its anti-inflammatory activity. GC/MS and LC-MS/MS were used to clarify the effective compounds of the sub-fraction ATiEA-II. Experiments on the anti-inflammatory properties of different Anthemis sp. have demonstrated the good anti-inflammatory potential of this species. Specifically, ATiEA-II, a sub-fraction of A. tinctoria var. tinctoria, may contain a novel anti-inflammatory drug molecule.
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