Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Gökçe, H. Suleyman(2)
- Simsek, Osman(2)
- Tekin, Ilker(2)
- Agar, Guleray(1)
- Cevahir Oz, Gul(1)
- Demir, Ilhami(1)
- Dispinar, Derya(1)
- Durmus, Gokhan(1)
- Ecem Bayram, Nesrin(1)
- Erzi, Eray(1)
- Gökce, H. Suleyman(1)
- Gürsoy, Ozen(1)
- Hasanoglu Özkan, Elvan(1)
- Hatungimana, Daniel(1)
- Hosseinnezhad, Hojjat(1)
- Kizil, Hamit Emre(1)
- Kotan, Turkay(1)
- Nartop, Dilek(1)
- Orak, Ikram(1)
- Ramyar, Kambiz(1)
- Sakiyan, Iffet(1)
- Sari, Nursen(1)
- Sevgili, Omer(1)
- Sorkun, Kadriye(1)
- Tekin, Duygu(1)
- Yurdakul, Muhammet(1)
- Yüksel, Caglar(1)
- Çolak, Murat(1)
- Öner, Erdal(1)
- Özel, Faruk(1)
- Özel, Sultan Suleyman(1)
- Üzüm, Onur(1)
Yayınlar
- MakaleAçık Erişim2026The Frequency-Dependent Electrical Properties and Fabrication of Diode
Sevgili, Omer; Orak, Ikram; Özel, Sultan Suleyman; Özel, Faruk
The fabrication of Al/NiO/p-Si Schottky diode (SD) was formed using a thermal evaporation system. The structural analyze of NiO using an interfacial layer was conducted using a Scanning Electron Microscope (SEM) and the SEM cross-section revealed a thickness of 0.0345 mu m for NiO interfacial layer. The capacitance-voltage (C-V) and conductance-voltage (G/omega-V) measurements of the fabricated SD were performed in the 50 kHz to 5 MHz frequency range and in the-3 V to +3 V range. The Nicollian-Brews method was employed to calculate the series resistance (Rs), while the high-low frequency capacitance method (CHF-CLF) was used to calculate the surface states (Nss). The value of the Nss was determined to be in the order of 1012 eV-1cm-2. These findings suggest that NiO is a promising alternative to conventional insulating layers in electronic devices.
- MakaleAçık Erişim2024Characterisation of aluminum alloys by octopus fluidity test
Erzi, Eray; Yüksel, Caglar; Gürsoy, Ozen; Çolak, Murat; Dispinar, Derya
Aim Determination of fluidity and tensile property characteristics of A206, A201 and A380 alloy with new octopus design Design & Methodology Melting and casting of alloys into sand moulds. Measurement of fluidity length and tensile properties Originality New fluidity test mould design where different cross section thicknesses are used to characterise the alloy properties Findings A356 has the lowest fluidity. A201 has lower fluidity compare to A206 but has the highest strength. A380 has similar characteristics with A201 Conclusion A380 can be an alternative choise for A201 alloy Declaration of Ethical Standards The authors of this article declare that the materials and methods used in this study do not require ethical committee permission and/or legal-special permission.
AtıfWoS3OpenAlex3
İncele - MakaleAçık Erişim2020Optimising High Lime Fly Ash Content By Means of Silica Fume Incorporation to Control Alkali-Silica Reaction And Drying Shrinkage of Mortars
Gökçe, H. Suleyman; Hosseinnezhad, Hojjat; Üzüm, Onur; Hatungimana, Daniel; Ramyar, Kambiz
In this study, the effect of binary and ternary cementitious systems composed of portland cement, high-lime fly ash and silica fume on the compressive strength, alkali-silica reaction (ASTM C 1567) and drying shrinkage of mortar mixtures was researched. For this purpose, binary and ternary binders were prepared with partial replacement of cement with either fly ash (15wt% and 30wt%) or silica fume (5wt%) or both mineral admixtures (15wt+%5wt% and 30wt%+5wt%). An alkali reactive basalt aggregate was used in this study. It was found that partial replacement of cement with high-lime fly ash reduced the strength of mortar mixtures even up to 28-days. Besides, addition of 5% silica fume had not a significant effect on the early strength of fly ash-bearing mixtures. However, silica fume inclusion improved the 28-day strength of mixtures. In terms of alkali-silica reaction (ASR), the fly ash with lower lime content reduced the 14-day expansion more than that of fly ash with higher lime content. The opposite results were the case in 28-day ASR expansions. The ASR expansions of the fly ash-bearing mixtures were significantly reduced by the introduction of the additional 5% silica fume to these mixtures. However, silica fume incorporation remarkably increased the drying shrinkage values of the mixtures. Finally, fly ash with higher lime content was found to be more satisfactory in terms of compressive strength, alkali-silica reaction and drying shrinkage in the ternary binder system.
AtıfOpenAlex1İncele - MakaleAçık Erişim2018Investigation of Superplasticiser Effect on Blended Cements Replaced By Bottom Ash
Tekin, Ilker; Tekin, Duygu
In the study, the main aim was determined conformity between blended cements and superplasticizer (SP) with fineness of mineral additives. Within this scope, compressive strength test and flow table test were performed on the cement mortars and standard consistency, setting times and soundness tests were performed on cement pastes which prepared with blended cements. In the experimental studies, bottom ash from Yatagan thermal power plant which was used after grinded size from 2 mm to 120 Am and 60 Am sizes was replaced with CEM I 42.5R type cement by weight 0%, 10%, 20% and 30%. Moreover superplasticizer additives which contained poly naphthalene sulfonate (PNS) from different companies were tried in blended cements According to the results, fineness of mineral additives increased the compressive strength of the mortars and accelerated setting times. PNS based SP's affects fresh paste behaviors such as reducing initial setting times and retarding finish setting times Another result is that company differences in PNS based chemical additives is significant parameter with cement conformity and this parameter makes up significant effects on fresh cement paste.
- MakaleYalnız künye2018Scopus SJRQ2Plant Origins of Propolis from Hakkari, Turkey
Ecem Bayram, Nesrin; Sorkun, Kadriye; Cevahir Oz, Gul
In this study, palynological analysis of 64 propolis samples from Hakkari province in Eastern Anatolia Region of Turkey was carried out. By microscopic analysis method, pollen diagnosis was made in propolis samples, and plants which may be propolis sources, were estimated. As a result, 71 plant taxa belonging to 34 families were identified at different rates in propolis samples. The pollens of the plants belonging to the family Apiaceae (2.7%-35%), Asteraceae (3.4%-35.4%) and, Fabaceae (12%-66%) were considerably found in the propolis of the Hakkari province. This study is the first report introducing the plant profile of Hakkari propolis in detail.
AtıfWoS1İncele - MakaleYalnız künye2018Scopus SJRQ2Anti-genotoxic Effects of Schiff bases and their Mn(III) Complexes Containing L-Aspartic acid and L-Phenylalanine
Hasanoglu Özkan, Elvan; Kizil, Hamit Emre; Sakiyan, Iffet; Nartop, Dilek; Sari, Nursen; Agar, Guleray
The purpose of the research was to evaluate the genotoxic and anti-genotoxic properties of Schiff bases and their Mn (III) complexes containing L-aspartic acid, and L-phenylalanine. The anti-genotoxic properties of four compounds in human lymphocytes cells were investigated by sister chromatid exchanges (SCEs) test system against aflatoxin Bi (AFBi). The results showed that compounds have strong anti-genotoxic properties.
AtıfWoS3İncele - MakaleYalnız künye2017Mechanical Properties of Conventional Concrete Produced With Different Type of Aggregates in Bayburt Region
Tekin, Ilker; Kotan, Turkay; Yurdakul, Muhammet; Öner, Erdal
In this study, the limestone, natural aggregate, serpentine and Bayburt stone located in the province of Bayburt used as aggregate in conventional concrete production. In the experiments, the cement dosage and workability were kept constant. Slump, Ve-Be, unit weight and the highest temperature values in first 2 hours of the fresh concrete were measured. The concrete samples prepared with Bayburt stone were cured for 90 days and the others were cured for 28 days in lime-saturated water. Strain-stress data and water absorption values were measured on the hardened concretes at 7 and 28th days age through the records of stress and strain data during compressive strength tests. According to results of this study, the compressive strengths of the concrete samples with limestone, natural aggregate and serpentine were on average of 40, 35 and 5 MPa, respectively, on the 28th day. Also, in concrete samples with Bayburt stone, the compressive strengths were reached to 16 MPa for 28 days and to 22 MPa for 90 days.
AtıfWoS4OpenAlex3İncele - MakaleYalnız künye2011Investigation of Usability of Basaltic Pumice Aggregate At Prefabricated Structure Light-Weight Concrete Components
Gökce, H. Suleyman; Simsek, Osman
At prefabrication, concrete which is 30 MPa and more compressive strength is generally used in the production of structure components such as colon, beam etc. In new generation productions, expected property of the components is not only compressive strength, but also tensile splitting strength, bond strength and lightness which provides advantage on movement and molding. In this study, the engineering properties of the concrete prepared by CEM I 42.5 R type cement by using pumice and normal aggregate were investigated On determination of compressive strength 100x200 mm sized cylinder sample, on determination of tensile splitting and bond strength 150x150x150 mm sized cube sample and O12 ribbed steel bar was used. It is found that light-weight concrete (LC) which was prepared with pumice aggregate is 30% lighter than normal concrete (NC) prepared with normal aggregate and at equal strength. According to the NC, the LC was obtained by 48% less tensile splitting strength and 15% less bond strength.
- MakaleYalnız künye2010Effect of Alternative Expanded Perlite Using on Properties of Raw Perlite Aggregated Light-Weight Concrete
Gökçe, H. Suleyman; Simsek, Osman; Durmus, Gokhan; Demir, Ilhami
Perlite is a natural building materials contribute to global warming positive thanks to its isolation and lightness characteristics as concrete aggregate with usage of in construction sector. In research results, about %74 of world perlite reserves was determined to be in Turkey. It is thought that energy of fairly hard obtained will provide more efficient usage thanks to efficient usage of the natural reserves. Such approaches will provide to reduce of environment pollution in the usage of energy. In this study, with different characteristic usability of expanded perlite aggregate was researched in raw perlite aggregated light weight concrete. 7 different mixtures were prepared in volume at 10% ratio by using 3 different expanded perlite aggregate instead of raw perlite aggregate. With prepared light weight concrete mixtures 100x100x100 mm sized cube samples were produced. 28 days compressive strength, unit volume weight and water absorption ratio of these sample were researched. As a result, with suitable characteristic usage of expanded perlite aggregate was understood to be effective on the mechanical and physical properties of perlite aggregated light weight concrete.
AtıfWoS3İncele - DergiJOURNAL OF POLYTECHNIC-POLITEKNIK DERGISI