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Koleksiyondaki öğeler
- MakaleAçık Erişim2022Scopus SJRQ4The role of A268V exon-7 polymorphism of PPARA in development of axial spondyloarthritis; [Aksiyal spondiloartrit gelişiminde PPARA'nın A268V ekson-7 polimorfizminin rolü]
Akbulut, Ekrem; Yolbas, Servet; Ozgen, Metin
Objectives: Axial spondyloarthritis (axSpA) is a chronic inflammatory disease that mainly affects the axial skeleton. Peroxisome proliferator activated receptor alpha (PPARA) is an intracellular transcription factor, which play a role in inflammation and osteoblasting activity. This study is designed to investigate the relationship of NG_012204.2:p.Ala268Val polymorphism of PPARA with axSpA risk and its role in disease development. Methods: This study was conducted with 168 patients and 181 controls. Genotyping was done with MALDITOF. Gene expression level was analyzed by quantitative real time PCR (RT-qPCR). The protein homology models of PPARA were created with ProMod3. Ligand binding dynamics were tested using the AutoDock4 docking program. Statistical evaluations were made with SPSS (ver24) and GeneGlobe. Results: Our results showed that C>T polymorphism causing NG_012204.2:p.Ala268Val change was associated with disease risk (p=0.024) and T allele increased disease risk 1.7 times (95% CI=1.070-2.594). PPARA expression decreased (p<0.05) in individuals carrying the T allele. We determined that the ligand entry pocket was opened 1.1 Å in the polymorphic PPARA. Polymorphic change caused a decrease in the ligand binding affinity. Conclusions: Our results provide an important contribution to elucidating the development of axSpA and demonstrate the potential of PPARA as a marker for the diagnosis of axSpA.
- MakaleYalnız künye2021Scopus SJRQ3Study on vibrational spectroscopy, molecular property, UV-VIS, HOMO-LUMO energies and MEP analysis of N-[2-(4-Bromo-benzoyl)-benzofuran-3-yl]-acrylamide monomer by DFT method
Barim, Esra; Akman, Feride
Purpose: This study aimed the synthesis and theoretical/experimental characterization of novel benzofuran-based acrylamide monomer. Design/methodology/approach: Novel N-substituted acrylamide monomer, i.e. N-[2–(4-Bromo-benzoyl)-benzofuran-3-yl]-acrylamide (BBFA), was synthesized by reacting (3-Amino-benzofuran-2-yl)-(4-bromophenyl) methanone with acryloylchloride at 0–5oC. Nuclear magnetic resonance (1H-NMR), infrared (FT-IR) and UV-Visible spectrophotometer were used to elucidate the chemical structure of BBFA. Computational studies were performed using the DFT (B3LYP) method on the basis of 6-31 + G (d, p) using Gaussian 09 W and Gauss View 5.0 package in addition to the VEDA program, gauge-independent atomic orbital (GIAO) and time-dependent density functional theory (TD-DFT) methods. Findings: Molecular geometry and vibration assignments of the BBFA monomer were calculated. The molecular structure of the monomer was examined. Both longest and shortest bonds were determined in the structure. The nucleophilic and electrophilic regions of the monomer were determined. The theoretical spectroscopic data of the monomer were compared with the experimental data; both were consistent with each other. The chemical reactivity of the monomer was also determined. Originality/value: The synthesized BBFA monomer can be evaluated in many areas; from medicine to industry (such as textiles) owing to the presence of various active functional groups. Indeed, acrylamide copolymers are remarkable materials for polymer science and industry. The data produced in this study is original and adds to the scientific community.
AtıfScopus5WoS5OpenAlex3
İncele - Kitap BölümüYalnız künye2021Fine–kinney-based occupational risk assessment using single-valued neutrosophic topsis
Gul, Muhammet; Mete, Suleyman; Serin, Faruk; Celik, Erkan
Neutrosophic sets are initially recommended by Smarandache (First international conference on neutrosophy, neutrosophic logic, set, probability, and statistics. University of New Mexico, Gallup, NM, pp 338–353, 2002 [1]). These sets reflect uncertainty and vagueness in real-world problems better than classical fuzzy set theory. It takes into consideration three decision-making situations called indeterminacy, truthiness, and falsity. In Zadeh traditional fuzzy set theory, there is just membership function fuzzy set degree. But, in neutrosophic environment, it considers three membership functions. Unlike intuitionistic fuzzy sets, an indeterminacy degree is considered. In this chapter, we applied a special form of neutrosophic set as single-valued neutrosophic set (SVNs) with the technique for order preference by similarity to ideal solution (TOPSIS) under the concept of Fine–Kinney occupational risk assessment. Since the mere TOPSIS has failed to handle imprecise and vague information which usually exist in real-world problems, we follow the integration of SVNs and TOPSIS. To demonstrate the applicability of the novel approach, a case study of risk assessment of a wind turbine in times of operation was provided. Comparative analysis with some similar approaches and sensitivity analysis by changing the weights of Fine–Kinney parameters are carried out. Finally, the Python implementation of the proposed approach is executed to be useful for those concerned in the future.
AtıfScopus12OpenAlex9İncele - MakaleAçık Erişim2021Scopus SJRQ2Comparison of quality attributes of minced beef samples thawed by ohmic and conventional methods
Cevik, Mutlu; Icier, Filiz
Frozen minced meat samples having different fat contents (2%, 10%, or 18%) were thawed using two different standard thawing methods (RT: +4°C refrigeration thawing, URWT: +4°C under running water thawing), and a novel alternative method (ohmic thawing-OT at voltage gradients of 10, 13, and 16 V/cm). The drip loss values of meat samples changed in the range of 0.01%–1.65%. For OT, the change in the color increased as the fat content increased. OT shortened the thawing time, on average, by 64% and 87% compared to URWT and RT, respectively, while it resulted in similar effects on proximate composition and microbiological load with standard thawing methods. This novel thawing method did not cause any mutagenic formation, and the metal migration was in allowable limits. It is thought that the results showed that OT method has the potential to be applied as a novel alternative method for thawing of meat products. Practical applications: For long-term storage of meat and meat products, freezing is commonly used. However, frozen food must be thawed before use. For this reason, two different conventional thawing methods were recommended by US-FDA. However, conventional thawing methods have some disadvantages such as long process times, high energy consumptions, and waste water formation. Ohmic thawing has shorter process time, high energy efficiency, and does not produce any waste water. In this study, frozen minced meat samples (with fat content of 2%, 10%, or 18%) were thawed using different thawing conditions (RT, URWT, and OT at voltage gradients of 10, 13, and 16 V/cm). OT shortened the thawing time. Drip loss was found to be high for OT. The effect of OT on microbiological load and proximate composition was not different from conventional thawing. OT method did not cause any mutagenic formation.
AtıfScopus26WoS23OpenAlex27İncele - MakaleYalnız künye2023Scopus SJRQ2Analysis of awareness of gynaecological cancers İn women using social media
Alp Dal, Nursel; Gümüşsoy, Süreyya; Ertem, Gül
This study aimed to use social media to investigate the relationship between the demographic, obstetric and gynaecological characteristics and the awareness of gynaecological cancer among women. The data were collected between 1st March and May 2018 using an internet-baseline survey/surveymonkey/google form. The sample was consisted of 1227 women who were literate, active social media users and had volunteered to participate in the study via social media. The GCAS scores of women who were in the age range 20–24 years, primary school graduates, no social security, were not pregnant, had a miscarriage, did not examine their external genital organs, had not entered the menopause and who did not use any family planning methods, were lower than the other women. The GCA of the women was found to be high.
AtıfScopus3WoS2OpenAlex5
İncele - MakaleYalnız künye2022Scopus SJRQ2Single and repeated low-velocity impact response of E-glass fiber-reinforced epoxy and polypropylene composites for different impactor shapes
Dogan, Akar
This study focuses on the effects of low-velocity impact (LVI) response of thermoset (TS) and thermoplastic (TP) matrix-based composites. In this study, the effects of the impactor shapes on the low-velocity impact response of the composite panels that produced from different matrix was investigated. Unidirectional E-glass fiber fabrics with an areal density of 300 g/m2 as reinforcement and epoxy matrix were used to produce TS composite. The vacuum-assisted resin infusion molding (VARIM) method was used to manufacture composite panels. The thermoplastic composites were manufactured with E-glass fiber-reinforced polypropylene prepregs. The tensile strength of TS matrix-based composites is higher than TP matrix-based composites that have the same fiber volume fraction. Despite being under the same impact energy, the TP specimens possess higher perforation threshold than TS specimens. The shape of the impactor significantly affected the perforation threshold. Besides, the impact number that caused perforation reduced dramatically in conical impactor. The repeated impact number that caused perforation is 36 for hemispherical (HS) impactor, but it is only 3 for conical impactor for polypropylene matrix-based composite. Moreover, a significant effect of fiber volumetric ratio on impact resistance was observed. The perforation threshold of glass fiber-reinforced polypropylene composites for 40% and 50% fiber volume fraction are 61 and 98 J, respectively. The perforation threshold of TP and TS specimens for HS impactor that has the same stacking sequence is 61 and 55 J, respectively.
AtıfScopus42WoS45OpenAlex44İncele - MakaleYalnız künye2022Scopus SJRQ2Production and properties of epoxy matrix composite reinforced with hollow silica nanospheres (HSN): mechanical, thermal insulation, and sound insulation properties
Demir, Eda; Güler, Ömer
Hollow silica nanospheres (HSNs) have superior properties such as low density, low dielectric constant, low thermal conductivity, good sound absorption, dispersibility, fluidity, and stability. They have the potential to be utilised as a reinforcing material in the development of next generation composites due to their properties. Epoxy is one of the commonly utilised polymers in today’s technology. Production of epoxy matrix composite materials reinforced with particles having superior properties will open up new application areas for epoxy. In this study, mesoporous HSNs were produced. The mechanical, thermal and sound insulation properties of the composite were examined by reinforcing these mesoporous HSNs to the epoxy matrix. The epoxy matrix was reinforced with HSNs at 1 wt.%, 5 wt.%, and 10 wt.%. When the concentration of HSNs in the epoxy matrix was increased, its strength increased and its ductility decreased. While the non-reinforced epoxy had a tensile strength of 36.45 MPa, but the tensile strength of epoxy at the end of 10% HSN reinforcement reached 89.06 MPa. The strain % reduced in half. The sound insulation properties of epoxy improved as the concentration of HSNs increased. Thermal conductivity coefficient dropped up to a 5% reinforcement ratio, and then increased slightly at a 10% reinforcement ratio. The microstructure analyses indicated that when the reinforcement ratio increased, difficulties in the distribution of reinforcements to the matrix appeared. Furthermore, it was observed that when the matrix/reinforcement interface was improved, the properties of the composite improved.
AtıfScopus14WoS13OpenAlex12İncele - MakaleYalnız künye2022Scopus SJRQ2A new signal processing approach/method for classification of power quality disturbances
Akmaz, Düzgün
The disadvantage of conventional signal processing methods used for Power Quality (PQ) classification is that their mathematical calculations are complex. Therefore, it is necessary to develop simple, effective, and fast signal processing tools to analyze the PQ signal. In this study, a new signal processing method with simple mathematical operations based on the Integer Factor (IF) down sampling/Approximation Derivatives (AD) was developed to analyze PQ signals. IF was employed to analyze the signals at various sampling frequencies, while the AD method was employed to obtain different degrees of detail and approximation coefficients for the signals. In order to prove that the IF/AD signal processing method can perform a fast and detailed signal processing analysis, the IF/AD method and the Discrete Wavelet Transforms (DWT)/Multiresolution method, which is one of the basic signal processing methods, were compared. It was determined that the developed signal processing method has analyzed PQ disturbances in a shorter time and in more detail than DWT/Multiresolution method. After it was determined that the IF/AD method was effective in the analysis of PQ signals, a new classification method based on the IF-AD signal processing approach, the Slime Mould feature selection algorithm, and Support Vector Machine was developed. The classification method was applied to synthetic signals with noise, real-time data generated in the laboratory and PQ online data. The results proved that the developed classification method was successful. Therefore, this study will provide a different approach to PQ classification methods and non-stationary signal analysis studies.
AtıfScopus10WoS8OpenAlex9İncele - MakaleAçık Erişim2022Scopus SJRQ1Synthesis and structural, electrical, optical, and gamma-ray attenuation properties of ZnO-multi-walled carbon nanotubes (MWCNT) composite separately incorporated with CdO, TiO2, and Fe2O3
Basgoz, Oykum; Guler, Omer; Evin, Ertan; Yavuz, Cagdas; ALMisned, Ghada; Issa, Shams A.M.; Zakaly, Hesham M.H.; Tekin, H.O.
In this study, Fe2O3, TiO2, and CdO semiconductor metal oxides were separately incorporated into the ZnO-MWCNT composite at different weight percentages. Accordingly, several experimental analyses on electrical, optical, and radiation shielding characteristics of coupled semiconductor metal oxides nanocomposites were performed to determine their monotonic impact on the investigated material properties. Moreover, gamma-ray shielding properties of these novel materials were determined using MCNPX general-purpose Monte Carlo code. At 5% oxide addition, the maximum electrical conductivity was found in all groups for all temperatures. Moreover, 5% oxide reinforcement resulted in the maximum reflection characteristics in all groups. Among the CdO doped materials, the CZnOCd5 sample exhibits the highest electrical conductivity behaviour at room and high temperatures. The Eg value calculated for the CZnOCd5 sample was 3.284 eV. The CZnOCd2.5 and CZnOCd5 samples had the greatest Eg values when compared to the pure sample and the samples from other groups. The CZnOCd5 sample has the highest reflectance value in the CZnOCd group's reflectance graph. On the other hand, the maximum gamma-ray attenuation properties were reported for CZnOCd5 sample. Among the analysed samples, the CZnOCd5 sample's characteristics provide a preliminary motivation for a more comprehensive analysis of this material and assessment of potential radiation protection applications.
AtıfScopus29OpenAlex28İncele - MakaleAçık Erişim2023Scopus SJRQ3Investigation of thermophysical properties of synthesized SA and nano-alumina reinforced polyester composites
Şahal, Hakan; Aydoğmuş, Ercan; Arslanoğlu, Hasan
Synthesis and characterization of 4-[(E)-(5-bromo-2-hydroxybenzylidene) amino]-N-(4-methylpyrimidin-2-yl) benzenesulfonamide (SA) has been performed. Alumina (Al2O3) and SA reinforced polyester composites are synthesized, and characterization processes are carried out. SA formed has been characterized by Fourier transform infrared (FTIR) spektrofotometre and nuclear magnetic resonance (NMR) spectroscopy. The thermal decomposition behavior of the nanocomposites in a nitrogen environment under non-isothermal conditions from 298 to 973 K is investigated with proportional-integral-derivative (PID) system. Thermal conductivity, Shore D hardness, and thermal decomposition behaviors of the nanocomposites that are added with alumina filler and synthesized with SA reinforcement have been compared. Nano-alumina filler raises the thermal conductivity coefficient and Shore D hardness of the polyester composites. The addition of synthesized SA reduces both the thermal conductivity coefficient and Shore D hardness. The thermal conductivity coefficient has been measured at the lowest in the pure polyester (0.056 W/m·K), and highest in the nano-alumina reinforced composite (0.072 W/m·K). The lowest Shore D hardness (nearly 68) is determined in the synthesized SA reinforced composite. Also, the experimental study has been optimized with the help of response surface methodology (RSM), and the improved theoretical models have been evaluated by statistical analysis.
AtıfScopus5WoS6OpenAlex13İncele - MakaleAçık Erişim2021Fermatean fuzzy TOPSIS-based approach for occupational risk assessment in manufacturing
Gul, Muhammet; Lo, Huai-Wei; Yucesan, Melih
The importance of risk assessment in the context of occupational health and safety by manufacturing operators strengthens their hands in solving the problems they may encounter in business processes related to health and safety. One of the most important phases of conducting an exhaustive occupational risk assessment is to analyze potential hazards and associated risks quantitatively. Since manufacturing is one of the industries that require workers to be highly exposed to work, creating a safer environment to reduce occupational injuries is an important task. This study proposes a novel fuzzy risk assessment approach developed by integrating Fermatean fuzzy sets (FFSs) and technique for order preference by similarity to ideal solution (TOPSIS) method for ranking potential hazards in manufacturing. FFSs are a new version of fuzzy set theory that covers the intuitionistic fuzzy sets and Pythagorean fuzzy sets. This version of the fuzzy set is crucial in the decision-making process to handle uncertain information more easily and reflect uncertainty better. A linguistic scale under Fermatean fuzzy documentation has also been developed for experts/decision makers to disclose their judgments easily. Occupational risk analysts can benefit from this approach since FFSs are used for the first time in occupational risk assessment, and the approach is presented in integration with TOPSIS. The proposed approach is applied in the aluminum plate-manufacturing process risk assessment. In the conclusion of the implementation, risks arising in the production are prioritized. In addition, this study made comparisons with other fuzzy methods to demonstrate the proposed approach’s difference and practicality. This study’s results can support practitioners and risk analysts in formulating the improvement measures to increase the safety of the work environment further.
AtıfScopus105WoS86OpenAlex108İncele - MakaleYayıncıda açık erişim2023Scopus SJRQ4Family Physician’s Opinions and Recommendations on the Family Medicine Practices
Baş, Kazım
Objectives: This study aims to evaluate the opinions and recommendations of family physicians working in family health centers regarding the practices of family medicine. Methods: This descriptive research was conducted with 307 family physicians working in family health centers of Elazığ and Muş provinces located in the east of Turkey between September and November 2021. The sample of this study was comprised of 193 (62.9%) family physicians who were available during the study period. The questionnaire created by the researcher was used to collect with the face-to-face interview technique and/or Google Forms data. Results: A total of 193 family physicians were included in the study. The mean age of the family physicians was 41.4±8.5 years, and their mean population was 3138.1±534.1 people. Of the family physicians, 184 (95.3%) stated professional devaluation, 179 (92.7%) excessive workload, the problems arising from the legislation, 173 (89.6%) performance, 158 (81.9%) the excess of the population to be served, 155 (80.3%) financial problems, coordination problems with senior management, 132 (68.4%) inadequate with the physical structure of the building and equipment, and 125 (64.8%) stated the insufficient number of non-physician personnel were among the factors negatively affecting work in family health centers. In addition, 180 (93.2%) family physicians stated that changes are needed in existing family medicine practices. Conclusion: According to the study results, there are negative situations that affect the effective and efficient implementation of family medicine practices. The current policy needs to be revised to carry out family medicine practices effectively and efficiently.
AtıfScopus2OpenAlex2TR Dizin2
İncele - Derleme MakaleYalnız künye2022Scopus SJRQ1Floating solar stills and floating solar-driven membranes: Recent advances and overview of designs, performance and modern combinations
Rashid, Farhan Lafta; Al-Obaidi, Mudhar A.; Hussein, Ahmed Kadhim; Akkurt, Nevzat; Ali, Bagh; Younis, Obai
For life to exist on earth, there must be water. Freshwater resources are in short supply due to industrialization and the world's rapid population expansion. Growing water shortage argues that using passive solar stills is the best and most practical solution in the world's arid and semi-arid regions. For applications in distant or rural coastal areas, floating solar stills are an appropriate technique. To provide accessibility to a wider population, the gadget should be constructed using inexpensive materials that are easily accessible nearby. However, the low-cost materials typically do not have the optimum physical characteristics, which reduces the overall performance of solar stills. This study intends to deliver a comprehensive review that summarizes recent research developments and gives a rundown of experimental, numerical, and experimental and numerical studies on floating solar stills and floating solar-driven membranes. This article also looks at a few more setups, researched parameters, and result-finding issues. Research on floating solar is currently ongoing, and recommendations for further research projects have been made in light of the study's findings.
AtıfScopus63OpenAlex59İncele - DüzeltmeAçık Erişim2022Scopus SJRQ2Correction to: Boron-Doped Hydroxyapatite Coatings on NiTi Alloys Using the Electrophoretic Deposition Method: Enhanced Corrosion and Adhesion Performances (Journal of Materials Engineering and Performance, (2021), 30, 10, (7365-7375), 10.1007/s11665-021-05968-x)
Aksoy, M.E.; Aksakal, B.; Aslan, N.; Dikici, B.
The following acknowledgment was inadvertently omitted from the originally published article: This work was supported by Yildiz Technical University, C¸ AP (Grant No. FCD-2019-3511).
AtıfScopus1WoS1OpenAlex1İncele - MakaleYalnız künye2022Scopus SJRQ2Effect of nonlinear modeling approaches used for composite elements on seismic behavior of composite framed buildings
Etlİ, Serkan; Güneyİsİ, Esra Mete
This study aims to assess the effect of nonlinear modeling approaches used for frame elements while appraising the seismic performance of the composite moment resisting frame (CMRF) buildings. To this, the accuracy and efficiency of two representative numerical models (namely, inelastic force-based frame element-distributed plasticity (DP) and inelastic force-based frame element-plastic hinge length (PHL) (lumped-plasticity)) for the columns and beams of CMRFs are evaluated comparatively. The number of stories of the buildings of the case study ranges from 5 to 15 and consists of columns made of concrete-filled steel tube sections and CMRFs designed with composite beams consisting of a combination of solid reinforced concrete slabs and steel beams. The structures are designed by considering high ductility level. Seismostruct software is used for design and performance analysis. During the performance evaluation of the structures, the nonlinear static pushover analysis is utilized as well as the incremental dynamic analysis. While performing the nonlinear static pushover analysis, the lateral loadings with uniform and triangular load distributions are used, and moreover, a series of earthquake ground motions are used in the incremental dynamic analysis. To evaluate the effect of the modeling approaches, the seismic response of the structures is assessed by comparing the load-displacement response, energy consumption, performance limit. Additionally, the behavior factor, dynamic behavior factor, inherent strength and overstrength factors, ductility factor and global yield value are discussed.
AtıfScopus2WoS2OpenAlex16İncele - MakaleAçık Erişim2021Active Tectonic Setting and Paleoseismicity of the Sancak-Uzunpazar Fault Zone; [Sancak-Uzunpazar Fay Zonu’nun Genç Tektonik Konumu ve Paleosismitesi]
Selcuk, Azad Saglam; Erturac, Mehmet Korhan; Karabacak, Volkan; Sancar, Taylan; Kul, Ahmet Ozkan; Yavuz, Mehmet Ali
Sancak-Uzunpazar Fault Zone is N40E-trending sinistral shear zone that has a 50 km length and 5 km width between Karakocan (Elazığ) in southwest and Kaynarpınar (Bingöl) in northeast. The fault extends parallelly to East Anatolian Fault is bounded by the North Anatolian Fault to the northeast and Karakoçan Fault to the southeast. Herein, morphological features, the tectonic setting of the Sancak-Uzunpazar Fault Zone and the first paleoseismological studies on it is represented. The Sancak-Uzunpazar Fault Zone is consist of two parallel segments (called East and West) with a 1.5 km distance. Conducted field studies and aerial photogrometry show that the segments exhibit morphological features like faceted surfaces, faulted scarps, shutter ridges, and offset streams. Especially, average offsets are about 7-12 m along the eastern segment while the cumulative maximum offset reaches 1.1 km. Moreover, revealed paleoseismological data show evidence of at least two surface ruptures during Holocene. Obtained morphological data reveal that the Sancak-Uzunpazar Fault Zone may have a relatively lower slip rate when compared to other active faults in the region and the reflection of the slip rate to the morphology is more evident in the eastern segment.
AtıfScopus1OpenAlex2TR Dizin3İncele - MakaleYalnız künye2022Scopus SJRQ3The adaptation of the Well-Being in Pregnancy (WiP) Questionnaire into Turkish: validity and reliability of a questionnaire
Sunay, Zeliha; Sabancı Baransel, Esra; Uçar, Tuba
This study aimed to adapt the Well-Being in Pregnancy (WiP) Questionnaire into Turkish and assess the instrument’s validity and reliability in pregnant women. Exploratory factor analysis (EFA) was applied to 500 pregnant women included in Sample I, while confirmatory factor analysis (CFA) was applied to 386 pregnant women in Sample II. As a result of the EFA applied to Sample I, it was found that the 12-item WiP encompasses two factors (Positive Affect and Satisfaction subscale and Concerns subscale), and as a result of the CFA applied to Sample II, it was found that the scale has good fit indices (χ 2/df = 1.990, p =.000, CFI = 0.95, GFI = 0.95, AGFI = 0.93, RMSEA = 0.04, and PCLOSE = 0.000). The Cronbach’s alpha internal consistency coefficients that were obtained as a result of the reliability analyses of the scale were found as 0.72, 0.70 and 0.60 for all items of WiP, its first subscale and its second subscale, respectively. It was found that the item-total correlations of the scale varied in the range of r = 0.44–0.55 (p <.001). In the test–retest analysis, a statistically significant positive correlation was found between the total scores of the scale obtained in two different implementations (r = 0.412, p =.024). This study supported the use of WiP as a valid and reliable instrument for Turkish pregnant women. Impact StatementWhat is already known on this subject? The Well-Being in Pregnancy (WiP) Questionnaire developed in 2017 by Alderdice et al. is a measurement tool that is used to determine the positive and negative emotions of pregnant women. This questionnaire has not been translated to other languages. What do the results of this study add? The reliability and validity of the Turkish version of WiP were found to acceptable, and two subscales were identified as the Positive Affect and Satisfaction subscale and the Concerns subscale. What are the implications of these findings for clinical practice and/or further research? This reliable and valid instrument can be used for measuring the whole spectrum of well-being rather than just poor psychological health.
AtıfScopus3WoS1OpenAlex6İncele - MakaleYalnız künye2023Scopus SJRQ1Mathematical modeling of vibration failure caused by balancing effect in hydraulic turbines
Kahraman, Gökhan; Özdemir, Osman
This article discusses the causes of vibrations depending on unbalanced hydraulic forces in rotating and non-rotating equipment in hydraulic plants within the scope of vibration measurement standards. The radial and axial positions of the turbine shaft, normal operating conditions, the absolute vibration of the signal output velocity during startup and shutdown during unbalance condition of the turbine, the proximity probes have been measured by TMO 793 accelerometer sensor and TMO 793 velocity sensor. The results obtained from the monitoring are analyzed and the first discussion is over the comparison of the current operating levels and vibration standards. Secondly, the comparison is analyzed in order to examine the improvement in vibration level of the elimination of hydraulic imbalance more comprehensively, considering the stability of the hydro turbine-generator unit, a proportional row damping force, proportional-order oil-film force and a hydraulic force and by creating a new non-linear proportional-order mathematical model. Changes in vibration levels and spectral bands for failure types are stated as well. The solution of this integrated and accurate mathematical model shows that it is useful and concise in the diagnosis and prediction of faults in hydropower plants.
AtıfScopus13WoS13OpenAlex16İncele - MakaleYalnız künye2022Scopus SJRQ1Margins of Allegiance and Revolt: Relations between Kurdish Tribes and the State from the Late Ottoman Period to the Early Modern Republic
Çakmak, Yalçın; Şur, Tuncay
The political and social interaction between the Ottoman Empire and Kurdish tribes, which can be traced back to the first quarter of the 16th century, continued until the modern republic with various continuities and ruptures. This multi-dimensional and complex relationship was neither in the form of absolute loyalty to the sultan, and thus to the Islamic caliph on a religious basis, nor a constant revolt against the authority of the empire in order to preserve their autonomy. Until the beginning of the 20th century, tribes were not only structures used by the Ottoman, Safavid, and Russian empires for their own interests. They were also organizations capable of dominat-ing a certain geographical area and had a vital potential to constantly generate violence and extend it to the empires and even between one another. Contrary to the state, which systematically and regularly perpetrated this violence and institutionalized and justified itself through the monopoly of violence, their inability to do so did not necessarily mean that they were not genuine political organizations and did not have their own agenda. This study, conducted largely in light of archival documents and Ottoman primary sources, aims to examine the boundaries of loyalty and rebellion in the oscillating relationship between Kurdish tribes and the Turkish state.
AtıfScopus4WoS3OpenAlex1İncele - MakaleAçık Erişim2022Scopus SJRQ2Health, safety, and environmental failure evaluation by hybridizing fuzzy multi-attribute decision-making methods for maritime scrubber systems
Başhan, Veysi; Yucesan, Melih; Demirel, Hakan; Gul, Muhammet
Many shipping companies have started using scrubbers in their fleet to eliminate sulfur emissions from ships, per IMO (International Maritime Organization) rules. Before and during the scrubbers’ selection, the scrubbers’ operational failures have also started to appear and cause serious concerns. In this study, classified scrubber types are explained and open type, closed type, and hybrid scrubber systems are evaluated. To contribute to this gap in the literature, scrubber failures were identified, five experts with different perspectives were consulted, and the most common and critical malfunctions were evaluated with the fuzzy best–worst method (F-BWM) and fuzzy technique for order preference by similarity to an ideal solution (F-TOPSIS). F-BWM was used to determine the importance weights of the risk parameters used in evaluating failures since it provides fewer comparisons among pairwise comparison–based decision-making methods and a more consistent judgment in the evaluation. F-TOPSIS, on the other hand, was used to determine the final priority scores of the scrubber failures, taking into account the risk parameter weights obtained in the first stage. It has been preferred due to its easy to useness and based on its closeness to the ideal solution and applicability to risk and failure analysis problems. Considering all different systems in general, important issues such as collection efficiency, sulfur emission problem, abrasion, leakages, pump failures, heat exchanger failures, air fan sealing failures, sensors and failures in monitoring the whole system have been investigated. Results show that too high axial velocity for separator and flooded separator, too high solids concentration in recirculation liquid (SF2), piping leakages (SF5), poor quality or inappropriate consumables and chemicals (SF11), and feed circulation pump problems (SF6) are found to be the most important problems among thirteen failures.
AtıfScopus23OpenAlex23İncele
