Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Gul, Muhammet(74)
- Akkurt, Nevzat(39)
- Celik, Erkan(35)
- Serdar, Osman(35)
- Güler, Ömer(33)
- Kutlu, Banu(32)
- Paksoy, Mehmet Yavuz(32)
- Yucesan, Melih(31)
- Tekin, H.O.(30)
- Yildirim, Numan(30)
- Yildirim, Nuran Cikcikoglu(30)
- ALMisned, Ghada(28)
- Mete, Suleyman(26)
- Danabas, Durali(20)
- Ince, Muharrem(20)
- Serin, Faruk(20)
- Ates, Mehmet(19)
- Can, Erkan(19)
- Onat, Onur(18)
- Benzer, Fulya(17)
- Kocabaş, Mehmet(17)
- Tanyol, Mehtap(17)
- Kizak, Volkan(16)
- Alataş, Mevlüt(15)
- Aydin, Rahmi(15)
- Kahraman, Gökhan(15)
- Kilic, G.(15)
- Polat, Alper(15)
- Susam, Selim Orhun(15)
- Xu, Qian(15)
- Aslan, Naim(14)
- Guler, Omer(14)
- Gürler, Nedim(14)
- Karatay, Gülnaz(14)
- Utku, Anıl(14)
- Yildirim, N. C.(14)
- Özkul, İskender(14)
- Demirol, Ferhat(13)
- Erguven, Gokhan Onder(13)
- Firat, Erhan(13)
Yayınlar
- BildiriYalnız künye2020A risk assessment approach using both stochastic data and subjective judgments
Mete, Suleyman; Oz, Nurdan Ece; Gul, Muhammet; Serin, Faruk; Celik, Erkan; Kahraman, C.; Cevik Onar, S.; Oztaysi, B.; Sari, I.U.; Cebi, S.
Risk assessment describes the overall process regarding identifying hazards and risk factors that have the potential to cause harm, analyzing and evaluating the risk associated with that hazard and determining appropriate ways to eliminate the hazard or control the risk. In the literature, lots of approaches are proposed to prioritize hazards and associated risks quantitatively. Fuzzy sets-based multi-criteria decision-making approaches are forefront that they have the ability in expressing the risks verbally based on decision-maker’s opinions and judgments. MCDA-based risk assessment approaches explain different types of uncertainties, which are generally modeled using stochastic analysis or fuzzy sets. The stochastic analysis is more suitable in modelling the probabilistic uncertainty. Therefore, in this study, a risk assessment approach using both stochastic data and subjective judgments is proposed, and a case study is also performed in a construction project. The VIKOR method is extended and a new risk assessment approach is developed where part of the data is stochastic. A three-year data is used to determine a fitted probability distribution of respected frequency. Evaluation of risks with respect to severity and probability parameters are then made by subjective judgments. In conclusion, a risk prioritization and potential action plan suggestion is performed.
AtıfScopus2OpenAlex3
İncele - MakaleYalnız künye2020Scopus SJRQ2“Home-buying behaviour model of Generation Y in Turkey”
Kayapinar Kaya, Sema; Ozdemir, Yasal; Dal, Murat
Purpose: The young population in Turkey is gradually increasing. Generation Y, which comprises the people born between 1980 and 1999 (Broadbridge et al., 2007) and free-spirited and tech-savvy, forms a large part of the population of the world, especially Turkey, and is of great importance to the housing sector for their home-buying preferences. In this study, housing preferences of students in Turkey’s two socio-economically different universities were comparatively analysed through quantitative methods. Design/methodology/approach: A survey was simultaneously distributed among students of two universities. The survey consists of six main factors: “reliability”, “economic opportunities”, “transportation opportunities”, “quality of life and social opportunities”, “quality standards”, and “technological opportunities”, with 25 statements. The questionnaire was developed through a comprehensive literature review and the opinions of university stakeholders. Findings: Results showed that the structure of the family and socio-economic differences affect home-buying preferences. The Mann–Whitney U test indicated that there was a meaningful difference of opinion between students of two universities. Munzur University students paid attention to economic opportunities when buying a home. Additionally, there was a meaningful relationship among the age groups in factors of “having a parking place” (p = 0.026) and “having a playground” (p = 0.026). As the age increases, students desire a playground around their future home. Research limitations/implications: The most important limitation of this study is the non-parametric data. Non-parametric data structure and the tests performed accordingly are less preferred than parametric data structure. For that reason, to what extent the results accurately represent Generation Y needs to be assessed through future study. Also, a certain number of sampling could be reached as purposive sampling was used. Originality/value: This study contributes to the literature in terms of comparatively analysing buying preferences of Generation Y through statistical methods and showing the relationship between these preferences and socio-economic features statistically. Due to the insufficient quantitative research on the literature, this quantitative study was carried future home-buying preferences of Generation Y university students, who will also be actively involved in the housing market. The purpose of this study investigates marketing factors that affect housing preferences of students in Turkey.
AtıfScopus9WoS7OpenAlex18
İncele - MakaleYalnız künye2020Scopus SJRQ4A comparison of morphometry features of the narrow-clawed crayfish (Astacus leptodactylus Eschscholtz, 1823) living in two different habitats
Yuksel, Fahrettin; Cilbiz, Mehmet; Demirol, Ferhat; Capkin, Kadir; Bektas, Zubeyde Hanoi; Gunduz, Fatih
Narrow-clawed crayfish (Astacus leptodactylus Eschscholtz, 1823) is native species to Turkey and the most important shellfish because of its commercial value and ecological role in ecosystem. The knowledge on bio-ecological features of narrow-clawed crayfish is limited. In this study, total length (TL), carapace length (CL), carapace width (CW), abdomen length (AL), abdomen width (AW), chela length (ChL) and chela width (ChW) of narrow-clawed crayfish were compared in two different habitats (Egirdir Lake and Keban Dam Lake). According to linear regression analysis, the highest relation was between TL and AL (R2=0.987) of the female in Egirdir Lake and the weakest relationship was between AW and ChL (R2=0.084) in Keban Dam Lake. Overall, the biometric features of A. leptodactylus populations in Egirdir Lake and Keban Dam Lake were different and these differences were significant in mid-length groups. These findings clearly demonstrated the impact of commercial catching on the length distribution of the crayfish stocks.
AtıfScopus5İncele - MakaleYalnız künye2020A RESEARCH FOR BACTERIAL SELF-HEALING IN METAKAOLIN BASED GEOPOLYMER MORTARS
Yilmazer Polat, Berivan; Uysal, Mucteba; Korkmaz, Volkan
Cement production is a polluting process for nature. For this reason, new types of concrete which can be produced with recycled materials and without cement continue to be investigated. On the other hand; cracks in structural elements reduce the strength and durability of a building. Extending service life of buildings has eliminated the cost of rebuilding and thus, contributed to both the economy and the ecosystem. Due to this, research on crack healing in Portland cement concretes with various bacteria is continuing for some time. However, there are not enough studies in literature regarding the improvement of metakaolin-based geopolymer mortars produced without using cement by urolytic bacteria. The parameters of temperature, pH and void ratio of bacterial geopolymer mortar affect the viability of bacteria. For example, pH value of the medium required for the survival of bacteria is, generally around nine. During the production of geopolymer concrete, a sudden increase in high alkali environment occurs due to use of activators. This reduces the survival rate of bacteria added to the mixture during the production of geopolymer mortar. In this study, the most suitable environment for geopolymer mortar, and the conditions for the bacteria to survive until the end of the curing process for the mortar to be strengthened were investigated. Analyses on the effects of urolytic bacteria and geopolymer mortar healing process on mechanical strength of the mortar were conducted. Sporosarcina Pasteurii were used for the self healing process. Various mixtures of geopolymer mortars were cured under different environmental conditions to observe changes in their mechanical strength and water absorption capacity. As the result of the study, the most suitable mixture ratio and curing medium were identified. It was observed that the nutrient, ensuring the life cycle of the urolytic bacteria, had no negative effect on the mechanical strength of mortar and reduced capillary water absorption of the mortar. This study is a specific text in the literature that analyzes bacterial curing conditions and the effect of improving geopolymer mortar.
AtıfScopus14İncele - MakaleYalnız künye2020Scopus SJRQ2A multi-method patient arrival forecasting outline for hospital emergency departments
Yucesan, Melih; Gul, Muhammet; Celik, Erkan
Patient arrivals at the emergency department (ED) of hospitals has an unpredictable behavior. So that, adequate forecasting of this process can serve a management baseline to better allocate ED human resources and medical equipment. In this paper, a multi-method patient arrival forecasting outline for EDs is developed. The methods followed within this study include single methods as linear regression (LR), autoregressive integrated moving average (ARIMA), artificial neural network (ANN), exponential smoothing and hybrid methods as ARIMA–ANN and ARIMA-LR. As the subject of the study, a private hospital ED case in Turkey is carried out. Data of ED patient arrivals for the year of 2016 was used to set up models. Forecasting performance of the multi-method outline was measured using mean absolute percentage error. The ARIMA–ANN hybrid model is shown to outperform in terms of forecasting accuracy. In order to contribute to the current knowledge, this paper is a novel attempt of applying these methods to model ED patient arrivals and making an overall assessment among them. The results can be used to aid in strategic decision-making on ED staffing and scheduling policy planning in response to predictable arrival variations.
AtıfScopus29WoS26OpenAlex37İncele - MakaleYalnız künye2020Scopus SJRQ4The protective effects of golden berry (Physalis peruviana L.) extract against to the oxidative and destructive effects of type i diabetes in rats
Erman, Fazilet; Kaya, Tubay; Aydin, Sevinc; Erman, Orhan; Yilmaz, Okkes
Type I diabetes is known as insulin-dependent diabetes mellitus, and the most important factor playing role in its formation is the genetic predispo- sition. Physalis peruviana L. (Goldenberry) is a plant, which has strong antioxidant properties, from Solanaceae family and, because of its fructose con- tent, plays regulatory role in blood glucose level of diabetics. In this study, it has been investigated the effects of goldenberry on the malondialdehyde (MDA), reduced glutathione (GSH), total protein, vitamins A, D, E, and K, and cholesterol levels which are the indicators of antioxidant defense and the oxidative damages in serum, muscle, kidney, liver and brain tissues of the rats, on which type I diabetes was induced by STZ. According to the obtained results, among the rats with STZ-induced type I diabetes, it was ob- served that the level of glutathione (GSH) increased and the level of malondialdehyde (MDA) decreased in all of the tissues of rats given goldenberry extract, while significant decreases were determined in the levels of vitamins K-1, K-2, D-2 and D-3 in all of tissues (except serum), and there were also decreases in the level of α-tocopherol and cholesterol in tis- sues of muscle, liver and kidney. In this study, it was shown that the goldenberry decreased the destructive effects of type-I diabetes by decreasing the serum glucose and lipid peroxida- tion and increasing the level of glutathione. It is believed that the obtained results would be used in fol- low-up of diabetic patients and in early diagnosis of the disease in future.
AtıfScopus4İncele - MakaleYalnız künye2020Scopus SJRQ3Increasing the Power Generation by Raising the Capacity of the Thrust Bearing Oil Cooling System in Hydroelectric Power Plants
Kahraman, Gökhan
Cooling capacity decreases due to faults appearing over time in the thrust bearing oil cooling systems of hydroelectric power plants and cooling process cannot proceed sufficiently. For this reason, while the turbine-generator unit generates energy, the thrust bearing heats up. This temperature problem prevents the unit from operating at full capacity and therefore decreases in energy production. Producing deficient energy in hydroelectric power plants, which is a renewable energy source, causes long-term economic losses for countries. In this study, the thrust bearing cooling system of a vertical Francis turbine, which produces 150 MW of energy per hour, is investigated. The reduction in the cooling capacity over time in turbine thrust bearing cooling system is solved by using exchanger system with additional plate and the power produced by the turbine-generator unit is increased 15 MW/h. This improvement has greatly contributed to the national economy. The method of increasing the cooling capacity applied to the hydroelectric power plant thrust bearings can be applied to all hydraulic turbines. This method will increase the energy production amount of the unit by approximately 10% and it costs approximately 80% cheaper than completely replacing the existing cooling system.
AtıfScopus5WoS2OpenAlex5İncele - MakaleYalnız künye2020Scopus SJRQ4Quality changes and storage life of common carp (Cyprinus carpio) with the use of Ginger (Zingiber officinale) essential oil
Sönmez, Pınar Erecevi t; Kuzgun, Nermin Karaton; Kirbağ, Sevda
Ginger (Zingiber officinale) essential oil is considered safe. In this study, ginger (Zingiber officinale) essential oil was used to extend storage life of common carp (Cyprinus carpio) and detect its protective effects. The following tests were performed to assess the shelf life of carp (C:control) treated with ginger essential oil (G). The microbiota growth of the carp, sensory properties, pH, TVB TBA values, the shelf life of the carp changed positively by adding ginger oil in different concentrations to the carp (C1, C2, C3: 0.1%, 0.25%, 0.5%ginger essential oil was added to carp samples). On the other hand; ginger essential oil has a positive effect on TVB-N and TBA values of carp fillets. With reference to the results of microbiota growth, carp sample (C: control) showed the highest value (P < 0.05) on the 6th storage day. The results show the importance of the use of Zingiber officinale essential oil to prevent food spoilage.
AtıfScopus2WoS1İncele - MakaleYalnız künye2020Scopus SJRQ2Evaluation of mobile games in the context of content: What do children face when playing mobile games?
Göksu, İdris; Aslan, Alper; Turgut, Yiğit Emrah
The aim of this study is to examine mobile games in the context of their content and to evaluate the situations faced by children through document analysis in terms of age-rating, game score, access permissions, the inclusion of advertisements, in-game purchases, encouraging consumerism, the inclusion of violence, bad habits, and educational value. The review and rating data of the games which can be found in Common Sense Media and Google Play Store were included in the study. These data were analyzed by descriptive content analysis using frequency (f) and percentage(%) values. According to our findings, it was revealed that 92% of the games involved in the study included in-game purchases and 75% of them included advertising. As a result of the investigations, it was also found that mobile games requested a lot of access permissions during installation. In addition, it was concluded that 90% of mobile games encouraged consumerism and 50% contained violence and fear elements. We think that the results are important in the way that they reveal the possible risks encountered by young people while they are playing mobile games and also in terms of increasing the awareness on the subject for both the users and their parents.
AtıfScopus5WoS7OpenAlex13İncele - MakaleYalnız künye2020Scopus SJRQ1Carbon nanotube (CNT) reinforced magnesium matrix composites: The effect of CNT ratio on their mechanical properties and corrosion resistance
Say, Yakup; Guler, Omer; Dikici, Burak
In this study, mechanical properties and corrosion resistance of AZ61 and AZ91 magnesium matrix composites reinforced with 01, 0.2, and 0.5 wt% carbon nanotubes (CNTs) were investigated, detailly. CNTs have been successfully synthesized with 15–20 nm diameters by chemical vapor deposition (CVD) method and then, added to magnesium alloys by using the powder metallurgy (PM) technique. The composite compacts were consolidated by cold-pressing under 500 MPa pressure and sintered for 2 h at 500 °C under Ar atmosphere. The characterization studies of the unreinforced alloys and composites were carried out by scanning and transmission electron microscopes (SEM, TEM), electron dispersive spectroscope (EDS), Raman spectroscopy, and X-ray diffraction. The mechanical properties and corrosion behaviors of the composites have been compared with compression tests and potentiodynamic scanning (PDS) techniques, respectively. The results showed that the effect of CNTs reinforcement on strength increase was greater in AZ61 series samples than AZ91-based composites. The corrosion results of the presented study showed that the composites reinforced with lower CNTs (such as 0.1 or 0.2 wt%) and unreinforced alloys had better corrosion resistance than high CNTs (such as 0.5 wt%) containing structures. However, the most resistant structure to the corrosion for both AZ61 and AZ91 alloys were obtained in the composites reinforced with 0.2 wt% CNTs.
AtıfScopus109WoS85OpenAlex104İncele - MakaleYalnız künye2020Scopus SJRQ3Inhibitory effect of Tunceli garlic (Allium tuncelianum) on blastocystis subtype 3 grown in vitro
Aykur, Mehmet; Karakavuk, Emrah; Karakavuk, Muhammet; Akıl, Mesut; Can, Hüseyin; Döşkaya, Mert; Gürüz, Yüksel; Dağcı, Hande
Objective: Blastocystis is a common protozoan parasite detected worldwide. This study aims to investigate the in vitro inhibitory effect of ethyl alcohol extracts of Tunceli garlic (Allium tuncelianum) on growth of Blastocystis ST3 subtype. Methods: Blastocystis ST3 were grown in 3 ml Jones’s medium containing A. tuncelianum prepared at five different concentrations for 72 hours at 37°C. Distilled water was used as negative control whereas metronidazole (MTZ) and trimethoprim-sulfamethoxazole (TMP-SMX) prepared in 0.1, 0.5 and 1 mg/ml of concentrations was used as the positive control. Results: According to the results, the MIC90 of the A. tuncelianum was 115 mg/ml at 72 hours. MIC90 of MTZ was 1 mg/ml at 72 hours (94.96%). TMP-SMX had the highest growth MIC90 effect which was reached at 1 mg/ml concentration during 24 hours (88.18%). The growth inhibitory effect of A. tuncelianum extract increased gradually in all doses and timepoints. Conclusion: In this study, obtained findings show the potential inhibitory effect of A. tuncelianum plant extract against Blastocystis ST3 which causes symptomatic diarrhea in humans. It may be recommended to consume the whole A. tuncelianum plant as food supplement. A. tuncelianum extract could be considered as an alternative for the potential treatment of Blastocystis infection.
AtıfScopus6OpenAlex7İncele - BildiriYayıncıda açık erişim2020Multimode Operation of Single Phase Matrix Converter with Safe Commutation Strategy
Boydak, Merve; Orhan, Ahmet; Caliskan, Abuzer
In this study, the multimode operation of Single-Phase Matrix Converter (SMPC) is examined. The SPMC was operated as a controlled rectifier and frequency converter using a single driver circuit. Mode selection is provided by changing the value of the constant block in the driver circuit. In the rectifier mode, the sinusoidal input voltage was rectified and transferred to the output. Output voltage at the desired frequency value was generated in the frequency changer mode. Voltage peaks in frequency converter mode were prevented with the safe commutation strategy used. Harmonics in the output voltage were examined for different modulation index values. Switches in the SPMC are switched using Sinusoidal Pulse Width Modulation (SPWM) technique. MATLAB/Simulink was used for simulation.
AtıfOpenAlex1İncele - MakaleYalnız künye2020Scopus SJRQ1Structural and catalytic properties of Fe3O4doped Bi2S3novel magnetic nanocomposites: P-Nitrophenol case
Kurnaz Yetim, Nurdan; Aslan, Naim; Koç, Mumin Mehmet
Catalytic properties of Bi2S3 nanostructures, Fe3O4 nanoparticles and novel Bi2S3@Fe3O4 magnetic nanocomposites were investigated. Flower-like Bi2S3 nanostructures were produced using hydrothermal synthesis. Bi2S3 nanostructures were doped with Fe3O4 nanoparticles where Bi2S3@Fe3O4 novel magnetic nanocomposites was obtained. Structural characterization of the nanoflowers were performed using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Microscopic characterization of the nanoflowers was performed using electron microscopy where scanning electron microscope (SEM) and transmission electron microscope (TEM) were used in the characterization which confirms the flower like structures. Vibrating sample magnetometry (VSM) confirmed the magnetic properties of the ferromagnetic characteristics of the magnetic nanocomposites. Optic properties of the nanoparticles were assessed using Ultraviolet - visible (UV-vis) spectroscopy. Band gap energies of the Bi2S3, Fe3O4 and Bi2S3@Fe3O4 were found to be 1.80 eV, 2.0 eV and 2.72 eV, respectively. Catalytic properties of the Bi2S3@Fe3O4 nanoparticles were confirmed using UV spectroscopy where reduction of p-nitrophenol to p-aminophenol was assessed in the presence of NaBH4. It was concluded that Bi2S3 nanostructures and Bi2S3@Fe3O4 nanocomposites showed better catalytic performance than that of Fe3O4 nanoparticles. Such a case was attributed to increased surface area - volume ratio. Results indicate that nanocomposites have the potential to be used in the wastewater treatment.
AtıfScopus55WoS55OpenAlex56İncele - MakaleYalnız künye2020Scopus SJRQ3A fuzzy-based occupational health and safety risk assessment framework and a case study in an international port authority
Gul, Muhammet
Ports are complex systems that play a crucial role in the transportation of maritime-related products and services. Since ports face various safety issues in design, installation, operation and maintenance processes, there are many aspects open for improvement in Occupational Health and Safety risk assessment and it is required to deal with risks, reduce them to an acceptable level and control. To struggle with emerging risks and manage this process better, a risk assessment framework is proposed for ports in this study. A case study is performed in a Turkish international port authority using the proposed framework. Fuzzy Analytic Hierarchy Process (FAHP), which is a commonly used fuzzy multi-criteria decision-making method, was used in weighting two risk factors: likelihood and severity. The orders of priority of hazards were then determined by a fuzzy-based VIKOR method based on the output of FAHP. The proposed framework overcomes some drawbacks, including a lack of assignment on the weight to two risk assessment factors and lack of the high dependence of the prioritisation on the experts’ opinions. To validate the results, a sensitivity analysis was conducted. In conclusion, the study contributes to the applicability of the proposed framework to assess the risks in ports and provides a distinct risk prioritisation.
AtıfScopus43WoS39OpenAlex49İncele - MakaleYayıncıda açık erişim2020Scopus SJRQ4Bioremediation of fluazifop-p-butyl herbicide by some soil bacteria isolated from various regions of Turkey in an artificial agricultural field
Erguven, Gokhan Onder; Nuhoglu, Yasar
The bioremediation rate of fluazifop-p-butyl (C19H20F3NO4) was monitored. Bacteria were isolated in agricultural soil samples. Fifteen sterilised glass jars were inoculated with 2, 5, 10, 20 cm3 of a homogenised bacterial mixture (109 CFU/cm3), then sterile agricultural soil and 60 µg of fluazifop-p-butyl (in liquid form) were added to each jar. Each week, filtrated water drained from bottles was analysed for fluazifop-p-butyl concentration, chemical oxygen demand (COD), biochemical oxygen demand (BOD5) and total organic carbon (TOC). Additionally, pH and dissolved oxygen concentration were monitored. The highest biodegradation rate was observed in the soil sample containing 20 cm3 of the culture media. In this media, fluazifop-p-butyl, COD, BOD5 and TOC removals were measured as 91, 83, 96 and 86%, respectively, at the end of the 2 months. The DO level was measured between 3 and 6 mg O2/dm3 in the first month for all cultures. An increase of pH was recorded during the first month and after this time a pH decrease was noted.
AtıfScopus5WoS5OpenAlex4İncele - Kitap BölümüYalnız künye2020Homoploid Hybridization and Its Role in Emergence and Diversity of the Genus Origanum L. (Lamiaceae)
Dirmenci, Tuncay; Arabacı, Turan; Özcan, Taner; Yazıcı, Türker; Martin, Esra; Çelenk, Sevcan; Açar, Mikail; Üzel, Devrim
Hybrid specimens can be occurred as same ploidy level (homoploidy) or not (polyploidy) with its parents. Homoploid hybrids are originated without any change in their ploidy level (2n) and polyploid hybrids are produced with the change in ploidy level (3n, 4n etc.). According to recent studies, the frequency of natural hybridization (homoploid and polyploid) has been estimated to 25% of all flowering plants. Recent studies show that the genus Origanum has homoploid hybrids. Hybridization is a common phenomenon among the species of Origanum in overlapping distribution habitats (natural or cultivated areas). Ietswaart suggested that the hybridization process is a significant factor in the speciation of Origanum, and Origanum is probably caused by the hybridization of the old tribe Saturejeae (now tribe Mentheae) genera. Based on the hypothesis of Ietswaart, we can discuss the emergence of the genus Origanum, its intrageneric speciation and its hybrids having the possibility for speciation via hybridization using morphological and cytological evidence. During the field studies, it was seen that many populations of wide-distributed species were overlapping, and some Origanum putative hybrid specimens were also observed in these overlapping areas with morphological differences from their parents. All studied Origanum species and hybrids have 2n = 30 chromosome numbers to define homoploidy. Palynological characters were revealed, and intermediate pollen structure (size, P/E ratio etc.) was seen in the hybrids between their parents. In addition, DNA extractions were done from all the hybrids and their parents. nrITS DNA was sequenced. Hybrid specimens have some heterozygous DNA loci in comparison to their parents. This study presents some evidence about homoploid the hybridization of the genus Origanum put forward by Ietswaart. If habitat, ecological and geographic isolations occur between the hybrids and their parents, these hybrids can be speciation via homoploid hybridization in the future.
AtıfScopus4İncele - Kitap BölümüYalnız künye2020Ideology of children animation series in Turkey: The case of Rafadan Tayfa
Özsel, Kadriye Töre
Cultural commodities take shape in accordance with the socio-political and ideological framework of the system in which they are produced. The aim of this chapter is to reveal that ideological framework for a Turkish animated series for children. The chapter is based upon ideology-critique perspective and selected series is Rafadan Tayfa. It is broadcasted on the kids channel of national broadcasting company TRT, was the most popular domestic animation series in April 2017. Selected chapters of the series are examined in accordance to Giannetti's methodological approach to identify ideological leanings in movies. It is found that the series has mild conservative leanings and presents a partly imagined "traditional neighborhood lifestyle" as an ideal form that is longed for.
- Kitap BölümüYalnız künye2020Microbial release of exopolymeric substances and their role in removal of pollutants from wastewater
Işıl Arslan Topal, E.; Topal, Murat
Activated sludge samples were seasonally collected from the aeration tanks of the Municipal Wastewater Treatment Plant located in Elazığ city (Turkey). Mixed liquor suspended solids (MLSS), mixed liquor volatile suspended solids (MLVSS), total solids (TS), suspended solids (SS), volatile solids (VS), chemical oxygen demand (COD), and sludge volume index (SVI) of the activated sludge were seasonally monitored in the treatment plant. Exopolymeric substances (EPS) were extracted in the samples collected. The EPS decreased in summer, while the EPS content was the highest in winter. The TB-EPS part of EPS was higher than the LB-EPS part of the EPS in all seasons. The lowest TB-EPS and LB-EPS were determined in summer, while the highest TB-EPS and LB-EPS were determined in winter. The carbohydrate, protein, and humic substance fractions of TB-EPS and LB-EPS followed the order of protein > carbohydrate > humic substance in all seasons. There was a negative correlation between the EPS content and SVI. The relationships between EPS and the removal efficiencies of TS, SS, and VS were quite low, while the relationship between COD removal and EPS was quite high.
AtıfScopus1OpenAlex1İncele - MakaleYalnız künye2020Scopus SJRQ3Investigation of the Effect of Operating Conditions Change on Water Hammer in Hydroelectric Power Plants
Kahraman, Gökhan
Renewable energy sources do not harm the environment, and they contribute greatly to national economies. Hydraulic energy is the leading renewable energy source. Hydraulic energy is used more widely than other renewable energy sources around the world. This situation of hydraulic energy makes it important to solve the faults in hydraulic turbine-generator units. In this study, water hammer impacts have been investigated. This issue is important and can be dangerous in hydroelectric power plants. As a result of the research, the optimum sudden shutdown time of the adjusting wings in the snail is determined by considering the different operating conditions of a hydroelectric power plant. When the turbine-generator units are operated according to the specified instantaneous shutdown time, they will be protected against the impact of the water hammer pressure and the turbine shaft overspeed. Thus, they will be operated with less risk.
AtıfScopus9WoS8OpenAlex8İncele - MakaleYalnız künye2020Scopus SJRQ1In-situ synthesis of 3D printable mono- and Bi-metallic (Cu/Ag) nanoparticles embedded polymeric structures with enhanced electromechanical properties
Aktitiz, İsmail; Varol, Remzi; Akkurt, Nevzat; Saraç, Mehmet Fahri
The interest of additive manufacturing with 3D printing increases day by day, which provides improved mechanical, electrical, magnetic and thermal properties of 3D parts. The production of 3D parts with the stereolithography (SLA) method, which allows it to be produced with high precision, resolution and complex geometries, distinguishes itself from other alternative additive manufacturing methods (FDM. SLS. LOM. LMD etc.). However, studies on the preparation of functional 3D polymer nanocomposites with the SLA method are quite limited. This study aims to produce silver (Ag) and/or copper (Cu) based 3D polymer nanocomposites for enhancing its mechanical strength, thermal stability and electrical conductivity. Mono and bimetallic (Cu/Ag) nanoparticles have been in-situ synthesized by selective irradiation of laser beam method using a commercial SLA device. In this method, metal (Cu/Ag) acrylate containing photocurable resin is not only cured but also leads to thermal decomposition of metal ions into nanoparticles to form functional 3D structures. The mechanical, electrical and thermal properties of polymer nanocomposites are characterized in detail. As a result of the analysis, the nanoparticles, with an average diameter of 25–55 nm, are well dispersed in the polymer matrix without agglomeration. The temperature at which 5% weight loss of Ag and Cu based polymer structures is measured as 179.3 °C while the glass transition temperature is found to be 223.81 °C. Most importantly, the resistance values are significantly decreased from 456.62 GΩ (Gigaohm) to 1.50 GΩ by increasing the amount of Ag addition at 3D polymeric structures. Therefore, this study allows the production of polymer nanocomposites not only in complex structures but also in desired properties especially for electrically conductive materials, capacitors and electronic applications.
AtıfScopus32WoS24OpenAlex33İncele