Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Gul, Muhammet(85)
- Serdar, Osman(72)
- Güler, Ömer(68)
- Akkurt, Nevzat(61)
- Baskonus, Haci Mehmet(54)
- Alataş, Mevlüt(53)
- Paksoy, Mehmet Yavuz(53)
- Yucesan, Melih(53)
- Bulut, Hasan(51)
- Tekin, H.O.(51)
- ALMisned, Ghada(48)
- Yildirim, Numan(48)
- Benzer, Fulya(47)
- Kocabaş, Mehmet(45)
- Yildirim, Nuran Cikcikoglu(44)
- Kutlu, Banu(41)
- Ince, Muharrem(39)
- Zengin, Gokhan(39)
- Batan, Nevzat(37)
- Utku, Anıl(35)
- Celik, Erkan(33)
- Topal, Murat(32)
- Ezer, Tülay(31)
- Tanyol, Mehtap(31)
- Can, Erkan(30)
- Sulaiman, Tukur Abdulkadir(29)
- Aslan, Naim(28)
- Özkul, İskender(28)
- Aslan, Alper(27)
- Cakilcioglu, Ugur(27)
- Erguven, Gokhan Onder(27)
- Kutluyer, Filiz(27)
- Kök, Mediha(27)
- Ates, Mehmet(26)
- Erten, Fusun(26)
- Kahraman, Gökhan(26)
- Onat, Onur(26)
- Dal, Nursel Alp(25)
- Danabas, Durali(25)
- Say, Yakup(25)
Yayınlar
- MakaleYalnız künye2022Scopus SJRQ3Characterization of the antioxidant activity, total phenolic content, enzyme inhibition, and anticancer properties of Achillea millefolium L. (yarrow)
Karaaslan Ayhan, Nagihan; Karaaslan Tunc, Merve Goksin; Noma, Samir Abbas Ali; Kurucay, Ali; Ates, Burhan
The antioxidant activity, total phenolic content, enzyme inhibition, anticancer properties of Achillea millefolium L. (yarrow), which is generally consumed by humans as herbal tea, were investigated. Yarrow extracts were prepared with different extraction techniques and solvents and the optimum conditions were determined. When the antioxidant activity and total phenolic content results were evaluated, the best yield was obtained with ultrasound-assisted extraction for all solvents. Moreover, the yields from highest to lowest were methanol, water, and acetonitrile. The enzyme inhibition and anticancer of Achillea millefolium L. extracts using methanol were evaluated. The IC50 values for the inhibition of xanthine oxidase and acetylcholinesterase were 4.974 ± 0.54 and 21.891 ± 1.118 µg/mL, respectively. The extract concentration was determined to be 23.85 μg/mL for 50% reduction in growth inhibitory activity cell viability (IC50) against breast cancer (MCF-7).
AtıfScopus7OpenAlex9
İncele - MakaleAçık Erişim2022Scopus SJRQ3Effects of Arbutin on Fatty Acid Levels of Erythrocyte and Serum in Wistar Albino Rats Treated with Potassium Bromate
Akkoyun, H. Turan; Aydın, Sevinç; Akkoyun, Mahire Bayramoglu; Bengü, Aydın Şükrü; Ekin, Suat; Erdem, Sinem Aslan
Background: In the presented study; the Effects of Arbutin (ARB) on the Rat Erythrocyte and serum fatty acid profile which is exposed to potassium bromate (KBrO3 ) were investigated. Materials and Methods: In this study, 32 Wistar albino rats weighing 250-300 g were used divided into 4 groups. Groups 1: control, group 2: KBrO3 (single dose 100 mg / kg gavage), group 3: ARB (50 mg / kg / day (ip) for 5 days), group 4: KBrO3 + ARB. At the end of the 5th day, alteration of fatty acid profile in erythrocyte and serum of rats in all groups was examined. Results: Rat serum essential fatty acid; palmitic acid (C16:0), myristic acid (C14:0), stearic acid (C18:0), oleic acid (C18:1), linoleic acid (C18:2), erythrocyte major fatty acids; palmitic acid (C16:0), myristic acid (C14:0), stearic acid (C18:0), oleic acid (C18:1), linoleic acid (C18:2), arachidic acid (C20:0), eicosenoic acid (C20:1), and lignoceric acid (C24:0). In addition, in our studied serum and erythrocytes; Total monounsaturated fatty acids (MUFA) varied between 8.91 ± 0.53-11.71 ± 2.55 and 33.71 ± 2.12-37.11 ± 2.12, respectively. It was determined that total polyunsaturated fatty acids (PUFA) varied between 5.90 ± 1.29-9.96 ± 1.18 and 14.72 ± 3.66-22.13 ± 4.82, respectively. Conclusion: In our study, alterations in fatty acid contents were observed, and results suggesting that arbutine affects the enzymes involved in Fatty acid metabolism and has an effect on fatty acid amounts.
AtıfOpenAlex1İncele - MakaleAçık Erişim2022Scopus SJRQ2Antioxidant and Enzyme Inhibitory Properties, and HPLC–MS/MS Profiles of Different Extracts of Arabis carduchorum Boiss.: An Endemic Plant to Turkey
Uba, Abdullahi Ibrahim; Zengin, Gokhan; Montesano, Domenico; Cakilcioglu, Ugur; Selvi, Selami; Ulusan, Musa Denizhan; Caprioli, Giovanni; Sagratini, Gianni; Angeloni, Simone; Jugreet, Sharmeen
In this study, six extracts of Arabis carduchorum prepared from solvents of varying polarity (water, methanol, ethyl acetate, dichloromethane, and n‐hexane) were investigated for their chemical profiles and total phenolic and flavonoid contents (TPC/TFC) using HPLC–MS/MS and spectrophotometric/colorimetric assays, respectively, along with the assessment of their antioxidant and enzyme inhibitory effects. In general, the polar extracts (methanol, water, and infusion) showed higher TPC/TFC than the other extracts (range:13.73–26.62 mg GAE/g; 2.66–52.95 mg RE/g, respectively). The total antioxidant capacity of the polar extracts ranged from 0.90–1.85 mmol TE/g in phosphomolybdenum assay, while the free radical scavenging potential ranged from 4.36–32.13 mg TE/g and 12.58–67.73 mg TE/g in DPPH and ABTS assays, respectively. While the water and infuse extract inhibited only butyrylcholinesterase (2.68 and 2.39 mg GALAE/g, respectively), the other extracts were found to inhibit both acetyl‐ and butyryl‐cholinesterases (0.96–2.73 mg GALAE/g and 1.86–5.11 mg GALAE/g, respectively). On the contrary, all extracts exhibited anti‐tyrosinase (40.24– 59.22 mg KAE/g) and anti‐amylase (0.09–0.63 mmol ACAE/g) activities. Overall, this study highlighted the effect of solvent polarity on the extraction of bioactive compounds and the biological properties of the extracts of A. carduchorum; hence, the results obtained could be used to guide optimum extraction in future studies.
AtıfScopus37OpenAlex39İncele - MakaleAçık Erişim2022Scopus SJRQ4Molecular Structure, Vibrational, Spectral Investigation and Quantum Chemical DFT Calculations of Poly(N-isopropyl acrylamide-co-nbutyl methacrylate)
Pihtili, Güzin; Hekim, Seda; Pekdemir, Mustafa Ersin
A new copolymer poly(N-isopropylacrylamide-co-nbutylmethacrylate) was synthesized by free radical solution polymerization process using 2,2′-Azobis(2-methylpropionitrile) as an initiator in 1,4-dioxane at 70 °C. The structure of the copolymer was characterized by Fourier Transform Infrared Spectrometer (FTIR), the proton nuclear magnetic resonance (1H NMR), and the ultraviolet-visible spectroscopy (UV-vis) method. Theoretically, density functional theory (DFT) (B3LYP) was utilized to identify the molecular geometry and then examine the vibrational frequencies and electrical characteristics of this molecule, with the 6-31G basis set in the ground state. In dichloromethane solution, UV-vis spectra of the molecule were calculated using the Time-Dependent DFT method. 1H NMR chemical shifts have been calculated with GIAO approximation, and the calculated results show good agreement with experimental chemical shifts.
AtıfScopus2WoS2OpenAlex2İncele - MakaleYalnız künye2022Scopus SJRQ1Graphene-reinforced novel poly(acetoxystyrene-co-glycidylmethacrylate) composites: Synthesis and optimization of dielectric behaviors using response surface methodology
Pihtili, Güzin
In this work, a new copolymer synthesis of Poly(acetoxystyrene-co-glycidylmethacrylate) (P[AOS-co-GMA]) by free radical polymerization (FRP) method is reported. The polymer composites (P[AOS-co-GMA]/graphene), containing different amounts of graphene, were prepared by the solution casting technique. Composites of Poly(acetoxystyrene-co-glycidylmethacrylate) loaded with 2.03 mass%, 5.00 mass%, 7.97 mass%, and 10 mass% graphene. The structure of AOS-GMA systems was characterized by fourier transform infrared, 1H-NMR and scanning electron microscopy. Thermal features were evaluated by the thermogravimetric analysis and differential scanning calorimetry. The aim of this study is to optimize the ε′ (dielectric constant) and ε′′ (dielectric loss factor) of pure polymer and graphene-doped (2.03-5-7.97-10 mass%) P(AOS-co-GMA) composite using response surface methodology. For optimization of the process and creation of the mathematical model, the central composite design package was used. The significance of the process parameters in the model was evaluated by analysis of variance (ANOVA) research. The effects of process parameters, frequency (Hz), voltage (V), and graphene ratio (mass%) on ε′ and ε′′ were examined at ambient temperature. The maximum ε″ value (8.01) was reached at around the 699 Hz frequency and at 11.43 V voltage at the graphene content of 9.82 mass%. The model estimated the maximum value of the ε′′ (0.08) when the frequency was set at 51.20, the voltage was fixed at 1.16 and the graphene content was fixed at 9.97 wt%. The ANOVA results showed that frequency and graphene content were the main model parameters and had a remarkable effect on the dielectric properties. This article presents the development of a new polymeric composite and optimize effect of process parameters, such as frequency (A), voltage (B) and amount of graphene (C).
AtıfScopus4WoS4OpenAlex4İncele - MakaleAçık Erişim2022Scopus SJRQ2The effect of COVID-19 restrictions on sleep quality of university students and variables predicting sleep quality
Bulut, Arzu; Sengul, Halil; Uslu, Yeter Demir; Bas, Kazim; Tosun, Nurperihan
BACKGROUND/AIM: The COVID-19 pandemic has created a long period of stress for people worldwide and has significantly affected sleep duration. The pandemic revealed new stress factors that are likely to affect sleep. Uncertainty is a factor that leads to anxiety and depression, which affects sleep. It should also be noted that reductions in sleep quality rather than sleep duration are associated with negative consequences on mental health. This study aims to investigate online that how this situation affected university students. MATERIALS AND METHODS: This research, with a descriptive study design, was conducted in Turkey between June 01, 2021 and July 30, 2021. The sample included 604 people who accepted voluntary participation, chosen by the random selection method. In the study, sociodemographic information form, Pittsburgh sleep quality index (PSQI), morningness-eveningness questionnaire scale (MEQ Scale), Beck depression inventory (BDI), and Beck anxiety inventory (BAI) were used as data collection tools. Pearson correlation analysis was utilized to examine the relationship between the scales. Multiple regression analysis was performed to investigate the role of morningness-eveningness, anxiety, depression, and insomnia severity on sleep quality. RESULTS: Sleep quality was negatively correlated with morningness-eveningness scores (r = -0.32, P < 0.01), and positively and significantly related with anxiety (r = 0.43, P < 0.01), depression (r = 0.40, P < 0.01) and insomnia severity (r = 0.55, P < 0.01). According to regression coefficients, while anxiety (β = 0.041, P < 0.001) and insomnia severity scores (β = 0.226, P < 0.001) positively predicted sleep quality, depression did not predict it significantly (β = 0.009, P > 0.05). A significant difference was found in sleep quality according to morning, evening, and intermediate types (F = 27.401, P < 0.001). CONCLUSION: Events related to the COVID-19 pandemic are associated with reduced sleep quality in connection with increasing negative moods. Considering the importance of sleep for a healthy life, efforts should be made to raise awareness about this issue and to provide psychological help to affected individuals.
AtıfScopus8WoS7OpenAlex10
İncele - MakaleAçık Erişim2022Scopus SJRQ1Effects of the BHA and basil essential oil on nutritional, chemical, and sensory characteristics of sunflower oil and sardine (Sardina pilchardus) fillets during repeated deep-frying
Erol, Nida Demirtas; Erdem, Ömer Alper; Yilmaz, Sebnem Tolasa; Kayalar, Hüsniye; Cakli, Sukran
This study was to evaluate the BHA and basil essential oil on the quality attributes of deep-fried sardine fillets and frying oil. The extent of lipid oxidation was monitored by measuring peroxide value (PV), thiobarbituric acid reactive substances (TBARS), TBA, and changes in free fatty acids. Sensory analysis and color values upon the frying period were also determined. PV, FFA, TBA, and TBARS values in fish fillets and frying oil have peaked and then decreased at the end of frying except for the control. BEO showed the highest sensory scores compared to others. As a result, it is not possible to make a clear judgment about the effect of the natural or synthetic antioxidants on all lipid oxidation products that may occur during frying both fish fillets and frying oil. This study suggests that secondary oxidation products in frying oil and the sensorial quality of fish fillets can be better controlled by using basil essential oil.
AtıfScopus25WoS23İncele - MakaleYalnız künye2022Scopus SJRQ1Performance evaluation of Turkish Universities by an integrated Bayesian BWM-TOPSIS model
Gul, Muhammet; Yucesan, Melih
This study aims to develop a university ranking model with the aid of performance measures in the “University monitoring and evaluation reports-2019” published by the Council of Higher Education Institution in Turkey. In this context, some of the performance criteria stated in these reports are filtered and 34 sub-criteria under five main criteria are weighted using the Bayesian Best-Worst Method (BBWM). Then, 189 listed public and private universities are ranked using the TOPSIS multicriteria decision-making (MCDM) method. We have adopted the MCDM concept because many evaluation criteria/sub-criteria and alternative universities are taken into account. For this study, we apply an integrated MCDM model. First, we use BBWM to accomplish the first goal and adopt the TOPSIS method for the second purpose, using the BBWM results. Our purpose in using BBWM is due to its probabilistic structure that reduces the loss of information when handling group decisions. In this context, the evaluations of 11 academic experts are combined and a solid weighting is made by obtaining the credal rankings of performance criteria. Using TOPSIS is its logic of proximity to ideal and the ability to evaluate many alternatives. In the context of the study, state-private university-based, nomenclature of territorial units for statistics-2 (NUTS-2)-based and classical geographical regions-based rankings are also discussed. The study seeks to help universities optimize their performance efficiently. The results of the study can be adapted as a reference for other educational institutions and public institutions in their efforts to evaluate, improve their performance and form various policies.
AtıfScopus79WoS61OpenAlex79İncele - MakaleAçık Erişim2022Scopus SJRQ2Comparison of nutrient contents of wild and farmed rainbow trout (Oncorhynchus mykiss, Walbaum 1792) from Keban Dam Lake in Eastern Anatolia region of Turkey
Özçiçek, Esin; Can, Erkan; Yılmaz, Ökkeş
In this study, fatty acids, fat-soluble vitamins (A, D, E, K vitamins) and cholesterol contents of wild-caught and farm-raised rainbow trout (Oncorhynchus mykiss) were compared. The amounts of docosahexaenoic acid (22:6 n-3, DHA) in wild and farmed forms were 21.56%–18.14%, 18.79%–16.21% and 14.34%–11.49% in April, May and June, respectively. Vitamin E, which is one of the fat-soluble and antioxidant vitamins, showed highest level among the vitamins. Vitamin E levels in both wild and farmed fish were 5.11–4.26, 4.83–2.89 and 0.99–1.95 mg/100 g in April, May and June, respectively. The substantial difference between wild and farmed rainbow trout was found in May (p < 0.05). In conclusion, both wild and farmed rainbow trout from Keban Dam Lake (Pertek Region) can be considered as good sources of n-3 polyunsaturated fatty acids (PUFA). However, it was observed that the n-3 PUFA level in wild form was higher than the culture fish within the investigated monthly periods. On the other hand, farmed fish demonstrated higher levels of n-6 PUFA over the wild individuals.
AtıfScopus11WoS9OpenAlex8İncele - MakaleAçık Erişim2022Scopus SJRQ1Preparation of ε-Caprolactone/Fe3O4 Magnetic Nanocomposite and Its Application to the Remazol Brilliant Violet 5R Dye Adsorption from Wastewaters by Using RSM
Pekdemir, Mustafa Ersin; Tanyol, Mehtap; Torğut, Gülben
In this study, poly (ε-caprolactone)/Fe3O4 magnetic nanocomposite (PCL/Fe3O4 MNC) was synthesized by ring-opening polymerization. Then, PCL/Fe3O4 MNC was used as a novel adsorbent to remove remazol brilliant violet 5R (RBV 5R) from the aqueous media. The effects of PCL/Fe3O4 MNC dosage, process time, and initial RBV 5R concentration on the removal of RBV 5R were studied using the central composite design (CCD) method. The adsorption process was optimized using the response surface methodology, and the optimum conditions were defined. Optimum RBV 5R removal of 95.40% was obtained at a contact time of 167.98 min, PCL/Fe3O4 MNC dosage of 0.40 g, and RBV 5R concentration of 7.18 mg L−1. The process was also designed using the adsorption kinetic models and isotherm. The experimental data of RBV 5R adsorption on PCL/Fe3O4 MNC followed the Langmuir isotherm and pseudo-second-order kinetic models than the other models. Morphological and chemical properties of the adsorbent-adsorbate system indicated the high adsorption yield of RBV 5R on PCL/Fe3O4 MNC was achieved. The structural characteristics of the PCL/Fe3O4 MNC were analyzed by Fourier-transform infrared, attenuated total-reflectance (ATR), and X-ray diffraction. ATR tests showed that no significant change in chemical bond is found in PCL/Fe3O4 MNC before and after the adsorption process. The morphology of composites was investigated by scanning electron microscopy. A vibrating sample magnetometer (VSM) was used for the measurement of the magnetic property. Thermal analysis of MNC was studied using thermogravimetric analysis and differential scanning calorimetry instruments.
AtıfScopus6WoS5OpenAlex6İncele - MakaleYalnız künye2022Scopus SJRQ2Dielectric Biodegradable Biopolymer-Based Graphene Nanocomposites for Use in the Packaging Industry and Capacitor Application
Gürler, Nedim; Torğut, Gülben
In this study, polyhydroxyalkanoate (PHA) and polylactic acid (PLA)-Graphene (G) nanocomposite films were synthesized by taking different concentrations of G via the solution casting process, and their structural, mechanical, opacity, thermal and dielectric properties were examined for the first time. Scanning electron microscopy (SEM) was used for investigating surface morphology. Films containing graphene were more opaque than films without graphene. The incorporation of graphene into the polymer matrix improved the mechanical property. The tensile strengths of the control PHA/PLA film and the graphene-reinforced 1 %G-PHA/PLA nanocomposite films were 18.98 and 24.34 MPa, respectively. Thermogravimetric analysis results showed that PHA/PLA−G nanocomposites had good thermal stability below 300 °C. Considering the dielectric measurements, it is seen that the dielectric constant (έ) and dielectric loss (ϵ”) decreased with increasing frequency and less changed at higher frequencies. The developer feature of graphene is remarkable in both parameters. The electrical conductivity of PHA/PLA−G nanocomposites was also examined as a function of frequency at room temperature. As the amount of G increased from 1 %wt to 5 %wt, the conductivity of the composites increased.
AtıfScopus9WoS8OpenAlex11İncele - MakaleYalnız künye2021A Maturity Model for Assessing Sustainable Project Management Knowledge Areas: A Case Study Within A Logistics Firm
Göçmen, Elifcan
Currently, the use of maturity models is widespread for evaluating the success of project management (PM) processes. Project management maturity models (PMMM) are valuable methodologies to improve the project management processes. In this context, this present paper seeks an answer to these questions: Which maturity levels are aimed for an organization to make the sustainable PM sound? Which propositions are made based on the obtained maturity levels? This paper aims to propose a PMMM by analysing PM knowledge areas. In response to this objective, nine dimensions and twenty seven maturity items are handled using of PM Solutions’ PMMM. In order to evaluate the maturity levels, Weighted Maturity Score Calculation Model (WMSC) approach based on survey questionnaires of two experts is used first for the PM knowledge areas. Weighted average score of all maturity items is obtained using Likert-scale and criteria weights are first calculated using Hesitant Fuzzy Analytical Hierarchy Process (HF-AHP). Practicality of these approaches is illustrated through a real data in a logistics organization. As a result, computational results indicate that risk management dimension with the level 1,4 has the lowest rating of all nine dimensions. The high maturity level 3,5 is observed in the quality management, as the maturity items in this dimension such as Quality Plan Preparation and Quality Plan Employment can have a favourable impact on the PM maturity. The findings reveal the effectiveness of the proposed method, which ensures practical and theoretical insights for organizations to determine their current and expected sustainable project maturity levels.
AtıfOpenAlex3TR Dizin1
İncele - MakaleYalnız künye202116.YÜZYILDAN 20.YÜZYILA çorum eşençay köyü tarihi (nüfus, yerleşim, vergi)
Dıvrak, Uysal
Anadolu, Osmanlının doğudan gelen Türkmenleri yerleştirdiği ve kuracakları devletlerinin temelini attıkları topraklardır. Anadolu’nun tamamen kazanılması sayesinde Osmanlı Devleti, çok büyük bir coğrafyada uzun süre hâkim olmuştur. Tarihte Anadolu’nun değişik yerlerinde aynı aidiyete mensup topluluklar bir araya gelerek yerleşim birimleri oluşturmuşlardır. Çorum’da kır yerleşmesi olarak görülen ve günümüzde üç parçaya ayrılan Eşençay Köyü’nün tarihi gelişimi, nüfusu ve geçmişte ödediği vergiler inceleme konusu yapıldı. Köyün bu üç bölümünün son nüfus sayımlarında toplam 576 kişiden oluştuğu görülmektedir. Köyün ekonomik ve sosyal durumu tahlil edilerek geçimlerini nasıl sağladıkları ortaya konuldu. Ayrıca kadı mahkemesine, köy halkının ne tür sıklıkla ve hangi şikâyetlerle gittikleri ortaya çıkarıldı. İlk olarak 1570 yıllarında köyün ismi ile ilgili kayıtlara tesadüf edildi. Bilindiği üzere Osmanlı Devleti, vergi almak ve gelir mülklerini tespit etmek için tahrirler ve sayımlar yapmıştır. Eşençay Köyü de bu sayımlara tabi oldu. Köy’de üretilen tarımsal ürünlerin neler olduğu görüldü. Geçmişten günümüze köyün nüfus durumu da ortaya konuldu. Özellikle Osmanlı Arşivi belgelerinden faydalanılarak hazırlanan bu çalışmada köyün tarihi ile alakalı tahrir, nüfus, temettuat ve şer’iyye sicil defterlerinden istifade edildi. Çalışmanın, yerel tarih çalışması yapacaklara katkı sunması, özelde ise Eşençay Köyü kütüğüne kayıtlı olanların köylerinin geçmişini öğrenebilmelerini hedeflemektedir. Ayrıca, Osmanlı belgelerinden köyün tarihsel gelişimi, sosyo-ekonomik durumu ve çevre köyler ile farklılıkları ortaya çıkarıldı.
- MakaleYalnız künye2021Teoriyi Batı ve Batı-Dışı Ayrımının Ötesinde Düşünmek: Küresel Uluslararası İlişkiler Fikri Üzerine Eleştirel Bir İnceleme
Gökcan, Özkan
Bu makale, 2014 yılında Amitav Acharya tarafından gündeme getirilmiş olan Küresel Uluslararası İlişkiler fikrini, Uluslararası İlişkiler teorileri bağlamında analiz etmektedir. Küresel Uluslararası İlişkiler fikri, disiplininin daha kapsayıcı, çoğulcu ve gerçek manada evrensel bir hale gelebilmesi için Batı/Batı-dışı, Kuzey/Küresel Güney, Batı/Batı Sonrası, Batı/Geriye Kalan gibi ikiliklerin aşılabildiği bir teorik birikimin inşa edilmesi gerektiğini varsaymaktadır. Ancak bu makalede de iddia edildiği gibi özellikle disiplinin mevcut durumu ve Küresel Uluslararası İlişkiler fikrinin daha emekleme aşamasında olan bir fikir olduğu göz önünde bulundurulduğunda bunu başarmak kısa vadede oldukça zordur. Küresel Uluslararası İlişkiler fikri, teoriye evrensel nitelik ve birikim kazandıracak bir çerçeve çizmede başarılı olmasına rağmen pratikte hayata geçirilmesini engelleyen birçok zorluk ile karşı karşıyadır. Bu makalede, öncelikle Küresel Uluslararası İlişkiler fikrine giden yolun taşlarını döşeyen Batı/Batı-dışı teori tartışmasının seyri iki ayrı bölümde ele alınmaktadır. Ardından gelen iki bölümde sırasıyla Küresel Uluslararası İlişkiler fikrinin temel varsayımları ve pratikte uygulanabilirliği eleştirel bir analize tabi tutulmaktadır. Son olarak ise Küresel Uluslararası İlişkiler fikrinin gelişimine katkı sunacağı düşünülen tavsiyelerin yer aldığı genel bir değerlendirme ile makale sonlandırılmaktadır.
AtıfTR Dizin1İncele - MakaleAçık Erişim2021Investigation of the changes in electrical conductivity values and rheological properties of poppy flower syrup
Çevik, Mutlu
In this study, the changes of electrical conductivity values of poppy flower syrups applied ohmic heating at different voltage gradients (30, 35 ve 40 V/cm) were investigated during the heating process. In addition, the changes of the rheological properties of the samples at different temperature values were determined and their suitability to different rheological models were tested. It was determined that the heating times of the samples changed between 280 and 592 s and tended to decrease depending on the increase in the applied voltage gradient. It was detected that the best model describing the rheological behavior of samples at all temperature values was the Power -Law Model. It was determined that the consistency coefficient (K) and apparent viscosity (μₐₚₚₐᵣₑₙₜ) values decreased as the temperature values increased. It was determined that the samples showed non- Newtonian dilatant (shear thickening) flow behavior under all measurement process conditions.
AtıfOpenAlex2TR Dizin1İncele - MakaleYalnız künye202140 yaş üstü bireylerin kardiyovasküler hastalıklar risk faktörleri bilgi düzeyleri ve bazı değişkenlerle ilişkisi
Karatay, Gülnaz; Yeşiltepe, Akgün; Aktaş, Hakkı
Amaç: Bu çalışmada, 40 yaş üstü bireylerde kardiyovasküler hastalık risk faktörleri bilgi düzeylerinin saptanması ve bazı değişkenlerle ilişkisinin ortaya konulması amaçlandı. Yöntem: Kesitsel türdeki bu çalışma; bir il merkezinde ağırlıklı tabakalı örnekleme yöntemi kullanılarak seçilen 40 yaş üstü 386 kişi ile yürütüldü. Veriler 15 Mayıs-15 Haziran 2018 tarihleri arasında yüz yüze görüşme yapılarak toplandı. Verilerin değerlendirilmesinde Mann Whitney U ve Kruskall Wallis analizi ile spearman korelasyon analizi yapıldı. Farklılığın hangi gruptan kaynaklandığını bulmak için düzeltilmiş Bonferroni testi kullanıldı. Bulgular: Katılımcıların KARRİF-BD toplam puan ve KVH’den Korunma, KVH Risk Faktörleri, KVH’nin Özellikleri alt boyut puan ortalamaların sırasıyla; 19,92±4,40, 6,20±1,56, 11,40±2,65, 2,31±1,08 olarak hesaplandı. Öğrenim durumu ve meslek ile KARRİF-BD puanları arasında istatistiksel olarak anlamlı fark saptandı. Sonuç: Bu örneklem grubunda KVH risk faktörlerine ilişkin bilgi düzeyinin diğer çalışmalarla benzerlik gösterdiği, risk farkındalığı ile davranışlar arasında uyum olmadığı saptandı.
AtıfTR Dizin7İncele - MakaleYalnız künye2021Dijital kurulumlar ve etkileşimli mekânlar
Çınar, Semih; Köse, Özkan
Doğası gereği sanat, tarihin hiçbir döneminde değişimin hiçbir türüne kayıtsız kalmamış; hatta bilakis toplumların ihtiyatla yaklaştığı, mesafeli bir tutum sergilediği değişim ve ilerlemelere ilk reaksiyonu daima sanatçılar göstermiştir. Bütün toplumsal üst yapı unsurlarını canlı bir organizma gibi düşündüğümüz takdirde sanat, doğası gereği değişimin en küçük titreşimleri bile, töreselliğin hislerini körelttiği devasa ölçekli toplumsal aygıtlar ve kurumsallaşmanın beraberinde getirdiği hantallığın esnek hareket kabiliyetinden yoksun bıraktığı kültürel yapılanmanın aksine; elindeki verileri sezgiselliğin büyük rol oynadığı karmaşık bir dizi bilişsel süreçlerden geçirerek süzer ve öngörülerini çoğu zaman hoş karşılanmasa da toplumla paylaşır. Kaçınılmazı dile getirdiği için bir önceki döneme ait kabul görmüş, risk içermese de güncel olanla örtüşmenin uzağında kalmış normlarla yargılanmak ve dolayısıyla tepkilerin hedefi olmak sanatçı için hiç de beklenmedik bir sonuç değildir üstelik. Sanatın bu etkin tavrı Günümüz sanat anlayışında teknoloji ve sanat ilişkisi, teknolojinin insan yaşamı üzerindeki hakimiyeti ile paralellik gösteren bir yapıya bürünmüştür. Gelişen teknoloji, birçok unsuru dijitalleştirdiği gibi sanatta da kullanım aracı olarak ele alınılması kaçınılmaz olmuştur. Bu durum sonucunda yeni deneyimler ortaya koyması açısından önemli olan “dijital sanat” kavramı ortaya çıkmış olup, beraberinde birçok yeniliği de getirmiştir. Disiplinlerarası sanat anlayışına yeni bir bakış açısı ile dijital ortamı mekan ile bütünleştirip, mekan algısını değiştirerek yeni bir boyuta taşımıştır. Bu çalışmada Dünyanın çeşitli yerlerinde oluşturulan dijital enstalasyon örnekleri ve farklı bakış açıları incelenmiştir.
AtıfTR Dizin3İncele - MakaleAçık Erişim2021Çiçek Tip Şaşırtma Levhasına Sahip Gövde Borulu Isı Değiştiricinin CFD Analizi
Işık, Erdem; Tuğan, Volkan
Gövde borulu ısı değiştiricilerinin ısıl ve hidrolik performansını etkileyen en önemli faktörlerden bir tanesi şaşırtma levhasıdır. Bu çalışmada, ANSYS Fluent programı aracılığıyla, çiçek tip şaşırtma levhasına sahip gövde borulu ısı değiştiricinin CFD analizi yapılmıştır. Analizlerde, çiçek tip şaşırtma levhasının gövde tarafı ısı taşınım katsayısına, basınç düşüşüne ve basınç düşüşü başına düşen ısı transfer oranına etkisini araştırmak amaçlanmıştır. Ek olarak, çiçek tip şaşırtma levhası ile geleneksel tek parçalı şaşırtma levhası karşılaştırılmıştır. Tasarlanan gövde borulu ısı değiştiricinin gövde tarafında çalışma akışkanı olarak su kullanılmıştır. Analizlerde, gövde tarafındaki akışkan için dört farklı kütlesel debi (1.2 kg s-1, 1.5 kg s-1, 1.8 kg s-1 ve 2.1 kg s-1) incelenmiştir. Çalışmadan elde edilen sonuçlara göre, çiçek tip şaşırtma levhasının geleneksel tek parçalı şaşırtma levhasına göre basınç düşüşü başına düşen ısı transfer oranını artırdığı gözlemlenmiştir.
AtıfOpenAlex2TR Dizin1İncele - MakaleAçık Erişim2021Ortaokul Öğrencilerinin Matematik Tutumu ve Problem Çözmeye Yönelik Algılarının Matematik Başarılarıyla İlişkisi
İlhan, Aziz; Poçan, Serdal; Gemcioğlu, Muharrem
Bu çalışmada ortaokul öğrencilerinin problem çözme becerisine yönelik algıları ve matematik tutumlarının, matematik başarıları ile olan ilişkisinin incelenmesi amaçlanmıştır. Çalışma tarama modeliyle tasarlanmıştır. Araştırma, Türkiye’nin Doğu Anadolu Bölgesinde bulunan bir ilde uygun örnekleme yöntemiyle seçilmiş ortaokullarda öğrenim gören 477 (245 kız, 232 erkek) ortaokul öğrencisi ile gerçekleştirilmiştir. Çalışmada veri toplama aracı olarak “Kişisel Bilgi Formu”, “Problem Çözme Becerisine Yönelik Algı Ölçeği” ve “Matematik Tutum Ölçeği” uygulanmıştır. Verilerin analizi sonucunda matematik tutumu ve problem çözme becerisine yönelik algıları cinsiyet ve anne-baba eğitim durumu değişkenleri açısından farklılaşmadığı, sınıf ve matematik başarısı değişkenleri açısından farklılaştığı tespit edilmiştir. Ek olarak ortaokul öğrencilerinin problem çözme becerisine yönelik algıları ve matematik tutumları ile matematik başarısı arasında pozitif yönde anlamlı bir ilişki tespit edilmiştir. Matematik tutumu ve problem çözme becerisi algısı matematik başarısının birer anlamlı yordayıcılarıdır. Ayrıca matematik tutumu problem çözme becerisinin anlamlı bir yordayıcısı olarak bulunmuştur. Araştırma bulguları neticesinde problem çözme becerisi algısı ve matematik tutumunun öğretim süreçlerinde geliştirilmesi ile ilgili önerilerde bulunulmuştur.
AtıfOpenAlex11TR Dizin4İncele - MakaleAçık Erişim2021Experimental Analysis of PV/T Collectors Assisted with PCM for Off-Grid Domestic Applications
Bayrak, Fatih; Oztop, Hakan; Bakır, Eda
An experimental study was carried out to examine the efficiency of solar energy in photovoltaic thermal collectors (PV/T) with energy storage. A photovoltaic thermal collector was used to generate both electrical energy and hot water. The effects of inclination angle of PV/T collectors on power, temperature, energy and exergy values were investigated. Also, effects of cellular shading are tested and discussed. PV/T was compared with the conventional PV/T collector by adding phase change material (PCM) for one of the collectors. In addition, the effect of different shading conditions (small, medium and large circle) on the power and hot water output of the PV/T collector at optimum slope angle were investigated. It is found that 7 ºC temperature differences are occurred in the hot water outlet between the PV/T collector and the PV/T-PCM collector. The highest energy efficiencies of PV/T-PCM collectors are obtained as 73.26%, 84.70% and 68.96% for slope angle 25º, 30º and 35º, respectively. The highest exergy efficiencies of shaded collectors are obtained as 11.92% for PV/T and 23.38% for PV/T-PCM.
AtıfOpenAlex4TR Dizin1İncele