Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Uzun, Sevda(64)
- Merdan, Mehmet(47)
- Baltaci, Cemalettin(35)
- Kulakaç, Nurşen(28)
- Duran, Celal(27)
- Ozdes, Duygu(24)
- Turan, Ibrahim(24)
- Demir, Selim(23)
- Türkkan, Tuğba(22)
- Bayrakdaroglu, Serdar(21)
- Topal, Fevzi(21)
- Öztürk, Serkan(21)
- Ürkek, Bayram(21)
- Gücer, Mehmet Ali(20)
- Akar, Zeynep(19)
- Kaygusuz, Abdullah(19)
- Topal, Meryem(19)
- Anaç, Halil(18)
- Aydin, Aydanur(18)
- Batan, Nevzat(18)
- Erata, Hüseyin(18)
- Tuncer, Metin(18)
- Akyürek, Suat(17)
- Baltacı, Cemalettin(17)
- Karimullah, Suud Sarim(17)
- Acet, Tuba(16)
- Akar, Bülent(16)
- Ashyralyyev, Charyyar(16)
- Düzgün, Azer Özad(16)
- Hintistan, Sevilay(16)
- Yılmaz, Coşkun(16)
- Aliyazicioglu, Yuksel(15)
- Kaya, Hacer(15)
- Kurnaz, Muammer(15)
- Kurt, Kemal(15)
- Ozden, Talat(15)
- Yilmaz, Coskun(15)
- Yuksel, Ferhat(15)
- Yücel, Cem(15)
- Öz, Mehmet(15)
Yayınlar
- MakaleAçık Erişim2024Rheological properties of pestil enriched wheat, potato and corn flour using simplex lattice mixture design
Yuksel, Ferhat; Yavuz, Busra; Tunç, Merve Tuğçe
In this study, pestil was made using various concentrations of wheat, corn, and potato flours and the ideal flour combination amounts were determined using the simplex lattice mixture design technique. The apparent viscosity, G' (elastic modulus), G'' (viscous modulus), and tan δ (G''/G') analyses were determined. In all samples, it is seen that viscosity reduces while shear rate increases. This type of behaviour is pseudoplastic behaviour. While the highest apparent viscosity was observed in the 13th sample (12 g/100 g potato flour), the lowest was seen in the 11th sample (12 g/100 g wheat flour). In all samples, the elastic modulus (G') was higher than the viscous modulus (G''). The ANOVA table shows that linear data have a significant (p<0.05) effect on apparent viscosity, G', G'', and tan δ values. In general, formulations using potato flour show higher apparent viscosity values. Also, it is observed that the tan δ, G', G'' and apparent viscosity values increase with the addition of potato flour.
- MakaleAçık Erişim2024Scopus SJRQ1Integration of a CNN-based model and ensemble learning for detecting post-earthquake road cracks with deep features
Reis, Hatice Catal; Turk, Veysel; Karacur, Soner; Kurt, Ahmet Melih
A safe and healthy infrastructure is essential for humanity. Maintenance and repair of roads, which are of great importance, especially in transportation, is essential. Roads can sometimes be damaged due to natural disasters or human factors. In this study, roads damaged as a result of the natural disaster and the 6 February 2023 Gaziantep-Kahramanmaras earthquakes, which had devastating/fatal consequences, were studied. In recent years, the use of machine learning methods in the automatic detection process of road cracks has become widespread. Here, deep learning architectures generally based on multilayer convolutional neural networks have become a popular solution, mainly thanks to their high discrimination power in visual data. In this study, it was aimed to automatically detect cracks on the roads in Gaziantep (Nurdagi) and Adiyaman provinces after the earthquake. The data set used in the experimental process consists of two categories: uncracked and cracked, and was collected by the researchers. ResNet152 deep learning architecture, traditional machine learning algorithms, and an ensemble learning (EL) model were used to classify cracks. Among the machine learning algorithms used in the experiments are support vector machine (SVM), K-nearest neighbors, Adaptive Boosting, and Naive Bayes. In the experimental process, ResNet152 architecture was used for feature extraction, and classification was carried out with machine learning algorithms. In addition, the EL method has been used to improve the success of machine learning algorithms. According to experimental results, the SVM algorithm and EL method gave the most successful results with 98.68% accuracy values. The proposed method can benefit experts in the automatic classification of road cracks. The study can contribute to activating rapid coordination and transportation networks in natural disasters that cause fatal and destructive causes, such as earthquakes.
AtıfScopus19WoS16OpenAlex13
İncele - MakaleAçık Erişim2024Scopus SJRQ2Investigation of Antibiofilm and Antibacterial Properties of Green Synthesized Silver Nanoparticles from Aqueous Extract of Rumex sp.
Akay, Seref; Yüksel, Gamze; Özad Düzgün, Azer
The decrease in the effectiveness of conventional drugs as a result of the growth of resistance to antibiotics has increased the need for innovative tools to control the infections. At this point, metallic nanoparticles, in particular silver nanoparticles, have appeared as a promising method. In the current study, the extract of Rumex sp. (Labada, dock) leaves was used as a reducing agent for the formation of silver nanoparticles. Unlike similar studies, in this study the synthesis conditions were optimized by changing the extract ratio and silver nitrate concentration. Morphological investigations of synthesized silver nanoparticles showed that spherical homogeneous particles at size under 100 nm had been produced. SEM/EDS and FTIR analyses showed that plant components are involved in the synthesis of nanoparticles. It was also determined that higher extract ratio reduced nanoparticle size. The antimicrobial effects of the synthesized nanoparticles against Gram-positive and Gram-negative bacteria were tested, and it was determined that all nanoparticles exhibited activity against both groups. Rumex sp. silver nanoparticles (NPs) were revealed to exhibit antibiofilm activity against three different isolates with moderate and strong biofilm-forming ability. The NPs reduced the biofilm-forming capacity of Acinetobacter baumannii and Klebsiella pneumonaie by 2.66-fold and 3.25-fold, whereas they decreased the Escherichia coli biofilm-forming capacity by 1.25-fold. The investigation of microbial biofilm could play an important role in developing new strategies for treatment options. Our results suggest that Rumex sp. silver NPs may have a high potential for use in the treatment of pathogenic strains.
AtıfScopus8WoS7OpenAlex7
İncele - MakaleAçık Erişim2024Scopus SJRQ4OUTDOOR DEGRADATION ANALYSES OF SIX DIFFERENT AGED PHOTOVOLTAIC MODULE TECHNOLOGIES UNDER THE ARID-STEPPE CLIMATE CONDITION
Cantürk, Zeynep; Özden, Talat; Akinoglu, Bulent G.
Outdoor tests of photovoltaics module are crucial both for marketing and for research and technological developments. The electric generation performance and their degradation rates and lifetime are also related to different climatic conditions of the regions. In this work, the outdoor tests are carried out for six different photovoltaic (PV) modules under Arid-steppe Climate condition of Ankara, Türkiye. Their degradation rates are calculated by using linear regression (LR) and year on year (YOY) methods. The comparison between LR and YOY are carried out and with the other performed studies of different regions of world. In addition, it is investigated that how effective the climatic conditions on daily degradation rates. The results obtained are as follows: Mono-Si and Hetero-junction Silicon (HIT) cell modules degradation rates of 0.71/1.56 %/year and 0.84 %/year are respectively obtained by LR method and 0.57/0.90 %/year and 0.85%/year are respectively by YOY method. The degradation rates for Cupper Indium Selenide (CIS), Cupper Indium Gallium Selenide (CIGS) and microcrystalline Silicon/Amorphous Silicon (µc-Si/a-Si) modules have 1.73/1.49 %/year, 11.55/9.52 %/year and 1.48 %/year for LR method and 1.28/1.12 %/year, 9.94/9.53 %/year and 0.99 %/year for YOY method are obtained respectively. It is also obtained for the Polycrystalline Silicon Modules as 1.20/1.86 %/year degradation rates by LR method and 0.79/1.88 %/year degradation rates by YOY method.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2024Scopus SJRQ3The effect of transurethral resection of the prostate on sexual life quality in patient spouses
Aydin Sayilan, Aylin; Kulakac, Nursen
The purpose of this study was to determine the effect of transurethral resection of the prostate (TURP) surgery on quality of sexual life in patients' spouses. A pre/post-operative test, quasi-experimental design with no control group was employed. The research was conducted in the urology clinics of two hospitals in the west of Turkey between 30 June and 30 September 2022. It was completed with 172 patient spouses recruited using non-probability sampling. The study data were collected using an individual information form and the Sexual Quality of Life-Female questionnaire. The preoperative test applied prior to surgery was administered by the face-to-face interview method, while the postoperative test was completed by telephone interviews 8 weeks after the initial data collection. The mean age of the individuals undergoing TURP surgery in this study was 62.69 ± 7.98 years (min 40, max 77), and the mean age of the spouses was 57.91 ± 7.46 (min 39, max 73). Sexual Quality of Life-Female scores after surgery were significantly higher than the pre-surgical values (p < 0.001). A significant difference in sex life quality was determined in terms of age, education, employment status, presence of chronic disease, number of children, and ‘love marriages’ (p < 0.05). The sexual life quality of the spouses of patients exposed to TURP surgery increased significantly 8 weeks after the procedure. The quality of sex life was higher among individuals with higher education levels, working individuals, and those who ‘married for love’, but decreased in line with age and number of children.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2024Scopus SJRQ1Evaluation of Cherts in Gumushane Province in Terms of Alkali Silica Reaction
Demir Şahin, Demet
Alkali–silica reaction (ASR) occurs when alkali oxides coming from the cement composition in concrete come together with reactive silica and moisture coming from the aggregate. Additional maintenance and repair costs caused by the development of ASR in concrete cause the cost to increase. However, thanks to the measures taken against ASR in the early period, it contributes to the creation of sustainable and durable concrete structures. The article investigated the usability of cherts with eight different chemical compositions as aggregates in ready-mixed concrete plants in Gümüşhane. Cherts have been investigated for alkaline reactivity and are intended to be used largely as a source for concrete plants. ASR length changes of the samples prepared according to ASTM C1260 standard were determined after 3, 7, 14, and 28 days of the curing period. Microstructural examination, ultrasonic P-wave velocity, and bending and compressive strength experiments supporting ASR were carried out. The obtained test results were compared between the reference (limestone) sample and each other, as well as with the values specified in the standards. The compressive and bending strength values of the samples increase depending on their ASR. It was observed that the crack structures and types increased depending on the increase in the crack values.
AtıfScopus2WoS2OpenAlex5İncele - MakaleAçık Erişim2024Scopus SJRQ2Seismic Disturbances and Geodetic Effects: Unraveling the Impact of the Mw = 6.2 Petrinja Earthquake on the Croatian Positioning System CROPOS
Bjelotomić Oršulić, Olga; Varga, Matej; Yalvac, Sefa
A destructive Mw = 6.2 earthquake struck NW Croatia on 29 December 2020, ranking among the most hazardous events in the country in the last century. This study assesses the impact of the earthquake on the permanent geodetic stations of the Croatian national positioning system. Using a novel approach, we combined positioning station data with satellite radar data for the first time in a geodynamic study across Croatia. The analysis involved collecting daily solutions data from 11 nearby network stations as well as multi-temporal satellite images before and after the earthquake. The results reveal a significant co-seismic shift, with the Sisak reference station experiencing the largest displacement of 5 cm to the southeast. Stations up to 100 km from the epicenter exhibited horizontal shifts between 1 and 2.5 cm and vertical shifts between 2 and 4 cm. Satellite images confirmed the co-seismic effects on the permanent stations. The study establishes a strong correlation between geodetic and geological findings, suggesting that vertical displacements result from superficial deposit consolidation in the river plains due to the earthquake shaking, while positional displacement reflects tectonic block movements along the activated strike-slip fault system. The late 2020 earthquake may have further relaxed the accumulated strain on the Mt. Medvednica thrust fault system, which had ruptured in early 2020 with a lower magnitude than expected.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2024Scopus SJRQ3The effects of psychosocial interventions applied to forensic psychiatry patients on social functioning and anger level: a meta-analysis study
Emirza, Elif Güzide; Gülirmak Güler, Kübra; Uzun, Sevda
This study was conducted to determine the effects of psychosocial interventions on social functioning and anger levels in forensic psychiatry patients. Data for this meta-analysis study were gathered by searching databases such as PubMed, Web of Science, EBSCOhost, Google Scholar, and YÖK Thesis Center, without any year restriction, from September to December 2023. After a thorough review, 12 studies were deemed appropriate for the analysis. The findings of this meta-analysis indicate that psychosocial treatments administered to forensic psychiatry patients led to an increase in their level of social functioning (SMD: 0.513, 95% CI: 0.072–0.995; Z = 2.280; p <.05) and a decrease in their level of anger (SMD: −0.701, 95% CI: −1.301 to −0.100;Z = −2.287; p <.05). It was also observed that the effectiveness of the psychosocial intervention was not influenced by the type of psychotherapy, the country where the study was conducted, or the duration of the treatment. Psychosocial interventions for forensic psychiatry patients positively affect the mental health of individuals.
AtıfScopus4WoS3OpenAlex4İncele - BildiriAçık Erişim2024Super-Resolution Based ROI Enhancement Approaches for Palmprint Recognition; [Avu Izi Tanima I in S per z n rl k Tabanli ROI Iyilestirme Yaklasimlari]
MacAn, Huseyin Furkan; Bingol, Ozkan; Turk, Salih; Ekinci, Murat
The sizes of regions of interest (ROI) obtained from images captured by cameras in palmprint recognition may vary depending on the camera specifications and the position of the hand. The regions of interest that recognition systems can use are typically rescaled through interpolation techniques and then defined as inputs to the system. In such cases, there may be some loss of biometric data. This study aims to enhance the quality of the palmprint ROI images, which are critical for palmprint recognition systems. To achieve this, various super-resolution techniques were employed to reconstruct low-resolution ROI images to the target sizes while preserving the distinctiveness of their biometric features. This approach is designed to optimize recognition accuracy and improve data reliability in palmprint recognition processes.
AtıfScopus4OpenAlex3İncele - Derleme MakaleAçık Erişim2024Scopus SJRQ3Aflatoxin Detoxification by Biosynthesized Iron Oxide Nanoparticles Using Green and Black Tea Extracts
Gedikli, Hasan; Akdogan, Arda; Karpuz, Omer; Akmese, Osman; Kobya, Havva N.; Baltaci, Cemalettin
Researchers have recently been interested in employing nanoparticles (NPs) obtained from herbal extracts through green synthesis for various applications. This study investigated the detoxification of aflatoxins, which are toxic substances produced by molds Aspergillus flavus and Aspergillus parasiticus. The present work examined the levels of aflatoxins in hazelnut and peanut puree. Turkish black tea extract (BTE), Turkish green tea extract (GTE), green synthesized black tea-based iron oxide nanoparticles (BTFeONPs), and green tea-based iron oxide nanoparticles (GTFeONPs) were produced for aflatoxin removal. Characterizations and various antioxidant and antimicrobial activities of the tea extracts and iron oxide nanoparticles (FeONPs) were investigated. The aflatoxin levels of hazelnut puree used for this study were 6.57 ± 0.06 µg/kg for aflatoxin B1 and 13.03 ± 0.16 µg/kg for total aflatoxin, whereas the aflatoxin levels of (AFLB1) peanut puree were 7.79 ± 0.15 µg/kg for AFLB1 and 15.21 ± 0.12 µg/kg for total aflatoxin. Using soluble BTE resulted in a 40 to 50% decrease in aflatoxin levels in hazelnut and peanut purees, while soluble GTE led to a 30 to 45% decrease. Meanwhile, using BTFeONPs and GTFeONPs resulted in a 33 to 48% and 40 to 50% decrease, respectively, in aflatoxin levels in hazelnut and peanut purees.
AtıfScopus11WoS10OpenAlex10İncele - MakaleAçık Erişim2024Scopus SJRQ4An evaluation of the earthquake potential with seismic and tectonic variables for the West Anatolian region of Türkiye
Öztürk, Serkan; Alkan, Hamdi
In the present study, an evaluation of the region-time-magnitude behaviours of the earthquake occurrences in the West Anatolian Region (WAR), Türkiye, is carried out using the statistical and seis-motectonic parameters such as the b-value of Gutenberg-Richter relation, occurrence probabilities, and return periods of earthquakes. We also have mapped the Coulomb stress changes to observe the current and future earthquake hazard. In recent years, several large earthquakes such as the 1919 Soma (Mw = 6.7) and the 2022 and 2024 Aegean Sea (Mw = 5.3 and Mw = 5.1) revealed earthquake potential in the WAR. Coulomb stress analyses of 41 local events with mostly normal fault mechanisms have shown that posi-tive lobes (> 0.0 in bars) are mainly confined in the crust and uppermost mantle depths around Samos, Kos, and south of Lesvos. The smaller b-values (< 1.0) are observed in the same regions. On the contrary, we have observed a higher b-value from the offshore to onshore, south to north-trending direction, and negative scattered stress lobes (< 0.0 in bars) in slightly NW–SE oriented. The relationship between an increased b-value and negative stress change may indicate a similar seismicity for the region. In addition, we have analyzed the occurrence probabilities and return periods of the earthquakes, which showed us that Mw = 6.0 may occur at 75% in the intermediate term with an estimation of ~7 years. Our results reflect that these types of multiple-parameter assessments are important to define regional seismicity, seismic, tectonic, and statistical behaviours. Consequently, the areas with reductions in b-values and increments in stress imply the possible seismic hazard in the intermediate/long term.
AtıfScopus9WoS7OpenAlex5İncele - MakaleAçık Erişim2024Scopus SJRQ3The Effect of Smartphone Addiction on Sleep Quality and Lifestyle Behaviors of Adolescents
Göger, Berrin; Kahriman, Ilknur
Many studies highlight the negative impact of smartphone addiction on adolescents’ health. It disrupts sleep habits and lifestyle. The study was conducted to evaluate the effect of smartphone addiction on the sleep quality and lifestyle behavior of adolescents. It was conducted in public high schools in a city center in the Eastern Black Sea Region of Türkiye. The sample consisted of 546 high school students. Data were collected using a Descriptive Information Form for Adolescents, the Smartphone Addiction Scale—Short Version, the Pittsburgh Sleep Quality Index, and the Adolescent Lifestyle Profile Scale. According to the results, the incidence of smartphone addiction among adolescents differed according to gender, academic achievement, age of first smartphone (p =.044), and daily smartphone use time (p =.000). Mean Pittsburgh Sleep Quality Index scores were not significantly different for the same variables. There was a significant difference in mean Adolescent Lifestyle Profile Scale scores according to academic achievement, having a smartphone, and age of first smartphone acquisition. There was a weak positive correlation between smartphone addiction and Pittsburgh Sleep Quality Index scores and a weak negative correlation between smartphone addiction and Adolescent Lifestyle Scale scores. There was also a weak negative correlation between Pittsburgh Sleep Quality Index scores and Adolescent Lifestyle Scale scores. Smartphone addiction negatively affects adolescents’ sleep quality and lifestyle.
AtıfScopus1WoS1OpenAlex2TR Dizin1
İncele - MakaleAçık Erişim2024Scopus SJRQ1Factors affecting decisions of farmers to produce geographical indication dry beans: a case from Turkey
Dogan, Nilgun; Adanacioglu, Hakan
Geographical indications (GIs) are defined as labels that show the relationship of a product with a certain region. They are of great importance in terms of distinguishing these products from the similar ones in terms of the quality that the characteristic features of the region bring to the product, making them stand out commercially, contributing to the rural development and preserving the cultural heritage. Dry beans cultivated by the farmers in the Gümüşhane province is newly recognized as a GI product that is unique in both taste and quality. This study is intended to identify the factors affecting the farmers’ decision to produce GI-labelled dry beans. The survey was conducted in January–March 2021. A sampling size of the participants consisted of 50 farmers who cultivated GI-labelled dry beans and 50 non-GI dry beans. A binary logistic regression analysis approach was employed to identify the factors affecting the likelihood of the farmers cultivating the GI dry beans. The results of the model indicate that the young farmers with the low educational level, the low property land size, the low yield per decare, and the large farmland, the high annual agricultural income and specializing in the dry beans production are more likely to engage in the production of GI dry beans. For the farms involving the GI product, agricultural associations can be advised with the farmers with the wider agricultural acreage and the high annual agricultural income, and that specialize in the production of such products. The participation of the farmers in the agriculture enterprises involving the GI dry beans will depend on them seeing positive widespread effects, which requires a long-term commitment.
AtıfScopus5WoS4OpenAlex3İncele - MakaleAçık Erişim2024Scopus SJRQ4Investigation of friction behavior of TiO2: Al2O3 composite coating formed on AA2024 alloy by micro-arc oxidation
Boynueğri̇ Kaplan, Emine; Şüküroğlu, Ebru Emine
In this study, an alumina (Al2O3) ceramic coating and a composite coating containing titanium dioxide (TiO2) particles were prepared on surfaces of AA2024 substrates by micro-arc oxidation (MAO) treatment. The effects of micro-sized (≈20-30 µm) TiO2 particles incorporated into electrolyte on the microstructure, phase and chemical composition, thickness, and friction behavior of the coating were investigated. The surface morphologies of the coatings were analyzed by scanning electron microscopy (SEM). The phase and chemical compositions of the coatings were evaluated by means of X-ray diffraction (XRD) and energy-dispersive X-ray spectrometry (EDS), respectively. The friction coefficient of the coatings was investigated using a pin-on-disc tribometer under condition of dry slip sliding. Moreover, the wear tracks were analyzed by SEM. Addition of TiO2 particles into the electrolyte resulted in the reduction in number of pores and formation of smaller and more uniform pores in comparison with the Al2O3 ceramic coating. XRD analyses demonstrated that the TiO2:Al2O3 composite coating was composed of anatase-TiO2 and rutile-TiO2, as well as pure aluminum, α-Al2O3 and γ-Al2O3 which are the primary phases. The friction tests showed a significant reduction in the friction coefficient of the composite coated samples which contains titanium oxide (TiO2) particles in comparison with Al2O3 coated and uncoated samples. Copyright 2021, Yıldız Technical University.
AtıfScopus1WoS1İncele - MakaleAçık Erişim2024Scopus SJRQ3Probiotics Safety Aspect of Functional Foods
Oba, Sirin; Yildirim, Tugce; Karataş, Şeyda Merve
In recent years, interest in probiotics has increased as functional foods improve quality of life and consumers become more health-conscious. The European Food Safety Authority (EFSA) has determined that all common probiotics are safe for the general population. However, this definition does not guide the outcomes of using probiotics in people with diseases that favor them, as there are no strict regulations governing applicable trademark law and the manufacture of probiotics. For this reason, Probiotics are recognized to be beneficial for the majority of patients during treatment; however, patients with weakened immune systems may be at risk for bacteremia, endocarditis, and peritonitis. There are no necessary standards regarding safety and use protocols for probiotics. More information is needed on their use before recommending probiotics to treat or prevent disease in privileged groups. These products may be considered a public health concern by reviewing information on the use of probiotics to predict the likelihood of side effects in vulnerable groups (young children, the elderly, and pregnant women).
AtıfScopus7WoS6OpenAlex6İncele - MakaleAçık Erişim2024Scopus SJRQ3Examination of the relationship between conflict resolution styles and marital satisfaction: the mediating role of emotion regulation difficulties
Bülbül, Kenan; Odaci, Hatice; Türkkan, Tuğba
The aim of this study is to examine the mediating role of emotion regulation difficulties in the relationship between conflict resolution styles and marital satisfaction in married individuals. A total of 706 married individuals, 234 men and 472 women, constitute the study’s working group. The ages of the participants ranged from 21 to 60, with an average age of 38.45. As a result of the analysis conducted within the scope of the study It has been found that positive conflict resolution, retreat and subordination conflict resolution styles are positively related with marriage satisfaction, while negative conflict resolution styles are negatively related with marriage satisfaction. The results show that positive conflict resolution, negative conflict resolution, retreat and subordination conflict resolution styles have a direct effect on marital satisfaction, but this effect does not disappear when emotion regulation difficulties is controlled, so emotion regulation difficulties play a partial mediator role.
AtıfScopus2WoS2OpenAlex2İncele - MakaleAçık Erişim2024Scopus SJRQ1Enhanced Hysteresis Droop Control for Equivalent Load Sharing in Parallel PWM DC-DC Converters: Optimized Slew Rate by Resonant Filtering
Yanarates, Cagfer; Altan, Aytac
In this study, enhanced hysteresis droop control for equivalent and fast load sharing in parallel PWM DC-DC converters is presented. The basis behind the work encompasses power system stability, reliability, efficiency, reduction of losses and decrease in the operational cost. In this context, phase management, which constitutes the biggest problem, and the resulting factors such as ripple cancellation, thermal stress, transient response behavior and complexity, is aimed to manage with the proposed control scheme. Performance evaluation of the proposed system is based on sensitivity analysis against possible disturbance and noise, and comparative analysis with PI controller against uncertainty and parameter variations using mathematical modeling and simulation techniques. The results show that the proposed controller has improved performance in both noise attenuation and disturbance rejection at typical switching frequencies of DC-DC converters ranging from 100 kHz to a few MHz. Additionally, applying the proposed control technique considering 10% parameter variations led to the largest difference being recorded at 4% while this difference was 18.68% in conventional PI control. According to the findings of the simulation, the proposed control scheme reduces the settling time by a factor of 4.89, whereas it takes 775.862 μs seconds with the PI controller. Furthermore, with the suggested controller, the overshoot - which was 36.09% with the PI controller - is reduced to just 1%.
AtıfScopus7WoS6OpenAlex4İncele - MakaleAçık Erişim2024Scopus SJRQ3Effect of Interventions to Reduce Fear of Childbirth in Pregnancy: Meta-Analysis
Sarı, Tuğba; Gürhan, Nermin; Uzun, Sevda
BACKGROUND: Some pregnant women have negative emotions that may predominate and they may develop a fear of childbirth. This causes negative consequences for their health and well-being. A complete definition of the causes of childbirth fear has not yet been established in the literature, but in a systematic review, various factors were found. OBJECTIVE: This study aimed to reveal the effect of educational, cognitive, and behavioral interventions on the reduction of fear of childbirth (FOC) in pregnant women. METHODS: For this meta-analysis study, articles in PubMed, EBSCOhost, Web of Science, YÖK Thesis Center, and Google Scholar databases were searched without any year limitation in between September 2022 and February 2023. A total of 25 studies were included in this meta-analysis. The data were analyzed by meta-analysis and narrative methods. RESULTS: This meta-analysis showed that educational, cognitive, and behavioral interventions were effective in reducing FOC in pregnant women (standardized mean difference: −1.229, 95% confidence interval [−1.586, −0.872]; Z = −6,746, p = .000, I2 = 94.225%). In subgroup analyzes, intervention types such as antenatal education, mindfulness, psychoeducation, and psychotherapy were found to be effective in reducing FOC. Interventions applied to women who have FOC reduce the FOC and provide a more positive birth experience. CONCLUSION: Results of the present study showed that educational programs could serve as an important tool in reducing women’s fear from natural childbirth and in choosing physiologic birth.
- MakaleAçık Erişim2024Scopus SJRQ2Determination of the Cytotoxicity and Antibiofilm Potential Effect of Equisetum arvense Silver Nanoparticles
Akar, Zeynep; Akay, Seref; Ejder, Nebahat; Özad Düzgün, Azer
This study aimed to synthesize and characterize silver nanoparticles (AgNPs) by green synthesis from Equisetum arvense (Ea) extracts and to investigate their cytotoxicity, antibiofilm activity, and α-glucosidase enzyme inhibition. Diverse characterization techniques were applied to verify the production of nanoparticles. SEM examination confirmed that the size of nanoparticles is in the range of 40–60 nm. Also, interactions between silver and natural compounds of plant extract were confirmed through FT-IR and EDX analyses. It was determined that Equisetum arvense silver nanoparticles had antibiofilm activity against three different clinical strains with high biofilm-forming ability. AgNPs reduced the biofilm-forming capacity of clinical A. baumannii isolate with strong biofilm-forming capacity by approximately twofold, while the capacity of clinical K.pneumonaie and E.coli isolates decreased by 1.5 and 1.2 fold, respectively. The α-glucosidase enzyme inhibition potential of the AgNPs, which is determined as 93.50%, was higher than the plant extract with, and the α- 30.37%. MTT was performed to assess whether incubation of nanoparticles with A549 and ARPE-19 cell lines affected their viability, and a dramatic reduction in cell growth inhibition of both A549 and ARPE-19 cells was observed. It has been shown that A549 cells treated with 200 and 150 µg/mL nanoparticles had less cell proliferation compared to control cells at 24-h and 48-h incubation time. According to these results, Ea-derived AgNPs appear to have potential anticancer activity against A549 cancer cells. Investigating the effects of green synthesis nanoparticles on microbial biofilm and various tumors may be important for developing new therapies. The outcomes of this study have showed that Ea-AgNPsmay have a high potential both in the treatment of pathogenic strains that form biofilms, as well as in anticancer therapy use.
AtıfScopus10WoS9OpenAlex7İncele - BildiriAçık Erişim2024Scopus SJRQ4An Efficient Technique Based on Deep Learning for Automatic Focusing in Microscopic System
Dogu, Fatma Tuana; Dogan, Hulya; Dogan, Ramazan Ozgur; Ay, Ilyas; Sezen, Sena F.; Seyman, M.
During microscopic examination process, experts firstly determine the most appropriate focusing point by precisely moving the microscope stage in the Z axis. This manual focusing process may cause variability in results depending on hand-eye coordination and individual experience. Therefore, the development of automatic focusing offers superior quality and consistent imaging. Many researchers have studied automatic focusing systems and proposed many focus functions to extract focus information from multi-focus images. Nevertheless, these focusing systems still consist of several significant limitations such as requiring a supplementary material, longer running time, producing different performance depending on the sample and magnification objective. In this study, an efficient technique based on deep learning is proposed to automatically determine the focused image during microscopic examination processes to minimize these limitations in the literature. This technique takes a sequence of images with the same field of view and different focuses as input and gives the image with maximum focusing as output. The proposed technique is compared with other automatic focusing techniques on the literature. In this study, novel multi-focus image sequences obtained from liver, intestine, heart, kidney, and lung samples is prepared to evaluate the performance of automatic focusing techniques. These sequences are obtained by scanning with 10× and 40× magnification objectives. Running time, accuracy, number of local maximum points, range, and noise levels are used as evaluation criteria in this study. According to evaluation criteria results obtained in this study, it has been proven that the proposed technique provides better performance than other automatic focusing techniques.