Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Şahin, E." wg kryterium: Autor

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-24 z 24
    Tytuł:
    Influence of Pd Addition of CoCrMo Biomedical Alloys on the Microhardness Behaviour
    Autorzy:
    Sahin, O.
    Uzunoglu, S.
    Sahin, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401948.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.66.Dk
    62.20.-x
    Opis:
    CoCrMo alloys are often used as the material for metal artificial joint because of their high corrosion resistance and mechanical properties. In this study CoCrMo alloys having different palladium amount of produced by investment casting method. Scanning electron microscopy, X-ray diffraction method and indentation tests were used to examine the mechanical properties of the alloys. Indentation experiments were carried out using Vickers indenter that the loads range from 0.245 to 9.8 N. The alloys exhibit significant load-dependence (i.e., indentation size effect). Meyer's law, proportional specimen resistance model, and Hays-Kendall model were used to analyze the load dependence of the hardness. As a results for load-independent determination of the CoCrMo alloys, the Hays-Kendall model is found to be more effective than the proportional specimen resistance model and microhardness values decreases with increase of the Pd content.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-145-B-148
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical Characterization of CoCrMo Alloys Consisting of Different Palladium Ratios Produced by Investment Casting Method
    Autorzy:
    Sahin, O.
    Uzunoglu, S.
    Sahin, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401950.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.-x
    61.66.Dk
    Opis:
    CoCrMo alloys are one of the most commonly used materials for hip arthroplasty, knee and dental because of its mechanical properties, corrosion resistance, wear resistance and biocompatibility. In this study, CoCrMo alloys consisting of 1.68 to 4.33%Pd are produced by investment casting process under argon atmosphere. The microstructures and mechanical properties of CoCrMo alloy were studied using X-ray diffraction, optical microscopy, scanning electron microscopy, Knoop indentation hardness tests, focusing on the influences on the different palladium additives. The measured microhardness values of CoCrMo alloys having different palladium ratio are seen to be load-dependent. The observed load dependence was rationalized using the Hays-Kendall model and it was found that the resultant load-independent hardness decreases with increase of palladium ratios. As a results, microhardness decreases with increase of palladium amount.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-149-B-151
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Extending the vase life of cut hydrangea flowers by preservative solutions
    Autorzy:
    Kazaz, S.
    Kılıç, T.
    Şahin, E.G.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/12699195.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    Vase life is one of the most important factors determining the marketability of cut flowers and influenced by water balance strongly. In recent years, the consumption of hydrangeas as a cut flower has gradually increased. However, the vase life of cut hydrangea flowers is short depends on wilting. Thus, this study was conducted to determine the effects of different treatments [thymol (100, 150 and 200 mgL⁻¹), 8-hydroxyquinoline sulfate (8-HQS) (200 mgL⁻¹)], and their combination with and without 1% sucrose on the vase life, relative fresh weight, daily (solution uptake for 3 days) and total solution uptake of hydrangeas (Hydrangea macrophylla ‘Green Shadow’) harvested freshly. Distilled water was used as the control. Compared to the control, thymol 150 mgL⁻¹ treatment with 1% sucrose significantly increased the vase life of hydrangeas flowers in 5.80 days (from 10.7 to 16.5 days). It was also determined that same treatment increased the total solution uptake and delayed relative fresh weight loss. These results indicated that thymol treatments in combination with sucrose can be used to extend the vase life of cut hydrangea.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 4; 95-103
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vickers and Knoop Indentation Microhardness Study of β-SiAlON Ceramic
    Autorzy:
    Güder, H.
    Şahin, E.
    Şahin, O.
    Göçmez, H.
    Duran, C.
    Ali Çetinkara, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1492772.pdf
    Data publikacji:
    2011-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.-x
    62.20.Qp
    62.20.de
    Opis:
    In this paper, analysis and interpretation of mechanical property measurements of β-SiAlON ceramic were reported. Indentation microhardness of β-SiAlON ceramic was measured using the Knoop and Vickers indenters. The analysis of the Vickers indentation microhardness data reveals the reverse indentation size effect that is the apparent microhardness increases with increasing applied indentation test load. However, the Knoop indentation microhardness data exhibit indentation size effect that is the apparent microhardness increases with decreasing applied test load. The experimental Knoop microhardness data was analyzed using Meyer's law, elastic-plastic deformation model, proportional specimen resistance model, and Hays-Kendall's model. As a result, modified proportional specimen resistance model is found to be the most effective one for the load-independent $(H_{LI})$ microhardness determination of the SiAlON ceramic. It was seen that different models used to analyze the data obtained from the Vickers indentation do not give the same intrinsic hardness value. We also present the calculation of the Young modulus, E, of the β-SiAlON ceramic.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 6; 1026-1033
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation of Fine-Grained Silicon-Nitride Ceramics and their Characterization by Depth-Sensing Indentation Tests
    Autorzy:
    Şahin, O.
    Güder, H.
    Uzun, O.
    Şahin, E.
    Sopicka-Lizer, M.
    Göçmez, H.
    Artunc, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402391.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.-x
    62.20.de
    81.05.Je
    Opis:
    Both pressureless-sintered and dense, fine-grained silicon nitride ceramics were produced from mechanochemically activated nitride-based precursors. Scanning Electron Microscopy (SEM), Transmition Electron Microscopy (TEM), X-Ray Diffraction (XRD) and an ultra-low load microhardness tester were used to characterize these ceramics. Depth-sensing indentation (DSI) tests in the range of 200-1800 mN were performed on the silicon nitride ceramic to determine dynamic hardness (H_d) and reduced elastic modulus (E_r) values. These values were deduced by analyzing the unloading segments of the DSI curves. It was found that both H_d and E_r exhibits a significant indentation load dependence. Nix-Gao (NG) model was used to analyze the dynamic hardness data in the calculation of the load independent hardness value.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-355-B-359
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical Properties of Nanocrystalline Tetragonal Zirconia Stabilized with CaO, MgO and $Y_2O_3$
    Autorzy:
    Sahin, O.
    Demirkol, İ.
    Göcmez, H.
    Tuncer, M.
    Ali Cetinkara, H.
    Salih Güder, H.
    Sahin, E.
    Rıza Tuncdemir, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399801.pdf
    Data publikacji:
    2013-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.-x
    62.20.F-
    Opis:
    The citrate gel method, similar to the polymerized complex method, was used to synthesize homogeneous tetragonal zirconia at 1000°C. Nanocrystalline tetragonal phase has been fully stabilized at wide temperature range with 10 mol.% CaO, MgO, and $Y_2O_3$ addition. Scanning electron microscopy, X-ray diffraction, and microhardness tests are used to characterize synthesized materials. The grain size and dislocation density were calculated from X-ray diffraction data. The examined material exhibits indentation size effect behavior. Results revealed that the Vickers and Knoop microhardness are dependent on indentation test load. Geometrically necessary dislocation model and modified proportional resistance model are used to analyze the load dependence of the microhardness. The highest hardness values were obtained for the samples with CaO addition; however the lowest values were acquired for sample stabilized with $Y_2O_3$ by using both Knoop and Vickers techniques. This situation might be explained using the Hall-Petch relation.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 2; 296-298
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hardness Behavior of Alumina-Zirconia Nanocomposites Synthesized by Gel Process
    Autorzy:
    Sahin, O.
    Hasde, A.
    Göcmez, H.
    Tuncer, M.
    Ali Cetinkara, H.
    Salih Güder, H.
    Sahin, E.
    Rıza Tuncdemir, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399803.pdf
    Data publikacji:
    2013-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.-x
    62.20.F-
    Opis:
    The alumina-zirconia composites are one of the relatively good and promising candidates for biomaterials application, due to biocompatibility and their mechanical properties that combines high flexural strength with a high toughness. The aim of the present work is to analyze the mechanical properties of these composites, where zirconia content was varied from 5 to 50 wt%. The citrate gel method, similar to the polymerized complex method, was used to synthesize these ceramics. Scanning electron microscopy, X-ray diffraction and microhardness tests are used to characterize synthesized materials. The examined material exhibits the behaviour of indentation size effect. Modified proportional resistance model are used to analyze the load dependence of the microhardness. X-ray diffraction analysis was used to calculation of the grain size and dislocation density. It is found that hardness is decreased when the zirconia content increases with enlargement of grain size.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 2; 299-301
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mixing properties of nearly maximal entropy measures for $ℤ^{d}$ shifts of finite type
    Autorzy:
    Robinson, E.
    Şahin, Ayşe
    Powiązania:
    https://bibliotekanauki.pl/articles/1396026.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    entropy
    ergodic theory
    symbolic dynamics
    $ℤ^{d$ actions
    Opis:
    We prove that for a certain class of $ℤ^d$ shifts of finite type with positive topological entropy there is always an invariant measure, with entropy arbitrarily close to the topological entropy, that has strong metric mixing properties. With the additional assumption that there are dense periodic orbits, one can ensure that this measure is Bernoulli.
    Źródło:
    Colloquium Mathematicum; 2000, 84/85, 1; 43-50
    0010-1354
    Pojawia się w:
    Colloquium Mathematicum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication of Transparent Yttria Ceramics by Spark Plasma Sintering
    Autorzy:
    Korkmaz, E.
    Sahin, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032083.pdf
    Data publikacji:
    2017-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Je
    81.20.Ev
    81.40.Tv
    42.70.Hj
    Opis:
    Rapid densification of yttria (Y₂O₃) ceramics without sintering aids via spark plasma sintering at relatively low temperature of 1300°C for 40 minutes at two-step pressure profile, followed by post-annealing at 1050°C for 6 hours in air was attempted. Effect of preload pressure on microstructure, Vickers hardness, fracture toughness and optical in-line transmittance was investigated. Densification during spark plasma sintering did not involve any phase transformation and all phases have shown cubic structure according to X-ray analysis. The highest hardness and fracture toughness value was recorded to be 7.60±0.18 GPa and 1.16±0.07 MPa m^{1/2} with 10 MPa preload and 100 MPa final load. In addition to this, the highest transmittance with a value of 76.7% at a wavelength of 2000 nm was obtained when studied with 10 MPa preload and 100 MPa final load.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 3; 460-462
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving the Surface Properties of Cp-Ti by Pulsed Electro-Spark Deposition
    Autorzy:
    Yılmaz, M.
    Atar, E.
    Şahin, O.
    Kayalı, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1293045.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.47.De
    61.82.Bg
    Opis:
    Al-Ti intermetallic compounds were coated by electro-spark deposition. Commercially pure titanium (Cp-Ti) (grade 2) and aluminum rods were used as substrate and electrode materials, respectively. During the electro-spark deposition experiments the following pulse parameters in a group were used: pulse current amplitude, pulse duration and pause between the pulses of a pulse group with 100-300-500 A, 50-100 μs, and 100 μs, respectively. Al-Ti coatings having a thickness range of 15-30 μm were formed on the surface of titanium substrate using electro-spark deposition process. The coating properties such as the roughness and the thickness increased with increasing pulse duration and pulse current amplitude. The mass transfer coefficient decreased with increasing pulse current amplitude and pulse duration. The quality of the adhesion characters of the coatings, determined by Rockwell-C adhesion test, becomes worse from HF-2 to HF-4, due to increase of pulse current amplitude. Depending on the electro-spark deposition process parameters, the coating formed as AlTi or as layered structure consisting of AlTi+$AlTi_3$ when pulse current amplitude increases. The Al-Ti coatings include some micro cracks lying throughout the coating from surface to interface which is nature of this process. The maximum cross-sectional hardness of the coatings were in the range of 800-1150 HV.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 593-596
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimizing Technology Selection in Maritime Logistics
    Autorzy:
    Sahin, B.
    Senol, Y. E.
    Bulut, E.
    Duru, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/409136.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    technology management
    shipping logistics company
    RS-FAHP
    Opis:
    In this study, we consider a technology selection problem in maritime logistics based on lifespan, brand value, maintenance, repair, operations and cost. Low cost, acceptable risk, and environment friendly form of transportation are primarily required for the logistics sector. In a conventional holistic approach, technology is firstly selected in terms of its cost. However, in the step-wise manner, it is obvious that other factors (i.e. reliability, sustainability, etc.) directly involve in to the selection process. By using conventional AHP method, we investigate the general tendency of the ship owners and its reflections to the maritime logistics.
    Źródło:
    Research in Logistics & Production; 2015, 5, 3; 299-309
    2083-4942
    2083-4950
    Pojawia się w:
    Research in Logistics & Production
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of bean genotypes from turkey resistance to common bacterial blight and halo blight diseases
    Identyfikacja odorności genotypów fasoli z Turcji na zgorzel bakteryjną i zarazę
    Autorzy:
    Donmez, M.F.
    Sahin, F.
    Elkoca, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/11542438.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    Bean diseases caused by different pathogens reduce important yield and quality of beans in different bean growing regions in both Turkey and the other bean producing countries. In the present study, bacterial pathogens in the species of Pseudomonas savastanoi pv. phaseolicola (Burkholder) Garden et al. and Xanthomonas axonopodis pv. Phaseoli (Smith) Vauterin et al. causing economically important disease on bean plants growing in the commercial fields of Erzurum and Erzincan provinces located in the Eastern Anatolia region of Turkey has been isolated and identified. Totally thirty-six bean genotypes and two commercial cultivars commonly grown in the region have been screened for resistance to these pathogens both in greenhouse and field condition during 2001–2002. Disease severity in the field condition reduced seed quality and quantity of bean. Among the thirty-eight genotypes tested, only 36K was found to be resistant to both of the pathogens. Bean diseases caused by different pathogens reduce important yield and quality of beans in different bean growing regions in both Turkey and the other bean producing countries. In the present study, bacterial pathogens in the species of Pseudomonas savastanoi pv. phaseolicola (Burkholder) Garden et al. and Xanthomonas axonopodis pv. Phaseoli (Smith) Vauterin et al. causing economically important disease on bean plants growing in the commercial fields of Erzurum and Erzincan provinces located in the Eastern Anatolia region of Turkey has been isolated and identified. Totally thirty-six bean genotypes and two commercial cultivars commonly grown in the region have been screened for resistance to these pathogens both in greenhouse and field condition during 2001–2002. Disease severity in the field condition reduced seed quality and quantity of bean. Among the thirty-eight genotypes tested, only 36K was found to be resistant to both of the pathogens.
    Choroby fasoli spowodowane różnymi patogenami zmniejszają plon i jakość fasoli w różnych regionach, gdzie uprawia się tą roślinę, zarówno w Turcji, jak i innych krajach produkujących fasolę. W niniejszym badaniu wyizolowano i zidentyfikowano patogeny bakteryjne u gatunku Pseudomonas savastanoi pv. phaseolicola (Burkholder) Garden et al. and Xanthomonas axonopodis pv. Phaseoli (Smith) Vauterin et al. powodującego ekonomicznie ważną chorobę roślin fasoli rosnących na polach komercyjnych w prowincjach Erzurum i Erzincan znajdujących się w regionie Wschodniej Anatolii w Turcji. Przebadano ogółem trzydzieści sześć genotypów fasoli oraz dwie odmiany powszechnie uprawiane w tym regionie w latach 2002–2002 pod kątem ich odporności na te patogeny, zarówno w warunkach szklarniowych, jak i polowych. Nasilenie choroby w warunkach polowych zmniejszyło jakość i ilość nasion fasoli. Pośród trzydziestu ośmiu zbadanych genotypów, stwierdzono, że tylko 36K jest odporny na obydwa patogeny.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2013, 12, 4; 139-151
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chemical Effects on the K$\text{}_{β}$/K$\text{}_{α}$ Intensity Ratios in First-Row Transition Element Compounds
    Autorzy:
    Küçükönder, A.
    Büyükkasap, E.
    Yilmaz, R.
    Şahin, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/1994736.pdf
    Data publikacji:
    1999-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.70.-g
    82.80.-d
    Opis:
    Chemical Effects on the K$\text{}_{β}$/K$\text{}_{α}$ X-ray Intensity Ratios for Some First-row Transition Element Compounds Were Studied Experimentally and Calculated. the Vacancies in the K Shell Were Created by 59.5 keV γ rays from an $\text{}^{241}$Am Radioactive Source and Characteristic X-ray Radiation from Sample Was Measured by Using Si(li) and Ge(li) Detectors. the Calculations Were Carried Out Using Brunner's Model. the Calculated Relative K$\text{}_{β}$/K$\text{}_{α}$ X-ray Intensity Ratios Are in Good Agreement with the Present and the Previously Published Experimental Data.
    Źródło:
    Acta Physica Polonica A; 1999, 95, 2; 243-250
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nanomechanical behaviour and surface roughness of new generation dental fissure sealants
    Autorzy:
    Arslanoğlu, Z.
    Altan, H.
    Kale, E.
    Bılgıç, F.
    Şahin, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1068318.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.85.J-
    62.20.-x
    Opis:
    The aim of this study is the comparative evaluation of surface roughness, elastic modulus and hardness values of some new generation fissure sealants using nanoindentation method and triboindenter. In this study, we have tested five different materials of dental fissure sealant in five groups with six specimens in each. Tested specimens were prepared from the following materials; Fuji Triage as a glass ionomer, Glass Seal as a glass carbomer, Ultra Seal XT Hydro, Teethmate F-1 and Defence Chroma as three resin composites. In the study, Hysitron Triboindenter TI 950 machine was used for nanohardness measurements. This machine has load resolution of less than 1 nN and displacement resolution of 0.04 nm. Data were statistically analysed using one-way analysis of variance (ANOVA) and Kolmogorov-Smirnov Z tests. Hardness values of Fuji Triage, Glass Seal, Ultra Seal XT Hydro were fairly close. Same situation was seen between Teethmate F-1 and Defence Chroma. However, hardness values of the Teethmate F-1 and Defence Chroma was lower than in other examined materials. We can also say that the Defence Chroma has the lowest elastic modulus and Fuji Triage has the highest one among the examined materials. Surface of Teethmate F-1 was the roughest. On the other hand, Ultra Seal XT Hydro has the smoothest surface.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 388-393
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influences of Particle Impingement Angle and Velocity on Surface Roughness, Erosion Rate, and 3D Surface Morphology of Solid Particle Eroded Ti6Al4V Alloy
    Autorzy:
    Avcu, E.
    Yıldıran, Y.
    Şahin, A.
    Fidan, S.
    Sınmazçelik, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1194513.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Bx
    81.70.-q
    68.35.B-
    68.35.-p
    42.79.Ls
    Opis:
    In this study, it is aimed to investigate the effects of particle impingement angle and velocity on the surface roughness, erosion rate, and surface morphology of solid particle eroded Ti6Al4V alloy. Ti6Al4V samples were eroded in erosion test rig under various particle impingement angles (15°, 30°, 45°, 60°, 75° and 90°) and impingement velocities (33 m/s, 50 m/s, and 75 m/s) by using 120 mesh garnet erodent particles. Subsequently, erosion rates and surface roughness values of samples were analyzed and calculated as a function of particle impingement angle and velocity. Moreover, 3D surface morphologies of the eroded samples were prepared by using high definition scanner and image processing programs. Results show that erosion rates, surface roughness values and surface morphologies of Ti6Al4V alloy have been varied significantly depending on the both particle impingement angle and velocity. Erosion rates of Ti6Al4V alloy were decreased with increases in particle impingement angle; on the other hand, the surface roughness values were increased with increases in particle impingement angle. Both erosion rates and surface roughness values were increased with increases in particle impingement velocity. Finally, the surface morphologies of the eroded samples were evaluated deeply. It is concluded that the surface morphology variation of the Ti6Al4V alloy depending on the particle impingement angle and velocity were well correlated with the erosion rates and the surface roughness values.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 541-543
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical and Thermal Properties of Pumice Powder Filled PPS Composites
    Autorzy:
    Sahin, A.
    Yildiran, Y.
    Avcu, E.
    Fidan, S.
    Sinmazcelik, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182862.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Qk
    81.70.Bt
    81.70.Pg
    Opis:
    Recently, it is common application to use particle materials as fillers to improve engineering properties and lower the cost of finished product. Pumice powder is cheaper than most of traditional particle fillers, however use of pumice powders as a reinforcing material in composites has not been studied in literature. Hence, in this study we have investigated the mechanical and the thermal properties of pumice powder filled polyphenylenesulphide (PPS) composites. PPS composites were reinforced with pumice powder at different loading rates (0, 1, 3.5, and 10 wt%) and they were manufactured by twin screw extruder and injection molding machine. Thermal properties were investigated by thermogravimetric analysis and differential scanning calorimeter methods. Moreover, mechanical properties such as barcol hardness, tensile strength, and modulus of samples were investigated. Thermal properties of composite samples have varied significantly depending on the loading rate. Also mechanical properties of pumice powder filled PPS composites have showed better results than pure PPS. According to test results both of mechanical and thermal properties of composites have improved with pumice powder reinforcement and it is determined that pumice powders can be used instead of traditional particle fillers.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 518-520
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical Property Comparison of Al11Si Wheels Grain Refined by Ti, Nb and MTS
    Autorzy:
    Aydogan, F.
    Dizdar, Kerem Can
    Sahin, Hayati
    Mentese, E.
    Dispinar, Derya
    Powiązania:
    https://bibliotekanauki.pl/articles/2203929.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wheels
    grain refinement
    mechanical property
    tensile strength
    koła
    rafinacja
    właściwości mechaniczne
    wytrzymałość na rozciąganie
    Opis:
    In this work, 25 wheels were cast with three different grain refiners: Al5Ti1B, Al3Nb1B and MTS 1582. Samples were machined from the wheels to check the mechanical properties. It was found that Nb grain refinement had the lowest grain size (260 mm) and highest tensile properties (yield strength of 119-124 MPa and ultimate tensile strength of 190-209 MPa). Al5Ti1B and MTS 1582 revealed quite similar results (110 MPa yield and 198 MPa ultimate tensile strength). The fading of the grain refining effect of Al5TiB1 master alloy was observed in both Nb and Ti added castings whereas during the investigated time interval, the fading was not observed when MTS 1582 was used.
    Źródło:
    Archives of Foundry Engineering; 2022, 22, 4; 14--18
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The antimicrobial and antioxidant activities of extracts obtained from some moss species in Turkey
    Aktywność przeciwdrobnoustrojowa i przeciwutleniająca wyciagów z wybranych gatunków mchów rosnących w Turcji
    Autorzy:
    Erturk, O.
    Sahin, H.
    Erturk, E.Y.
    Hotaman, H.E.
    Koz, B.
    Ozdemir, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/72224.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Opis:
    Pharmaceutical industry is forced to develop new pharmacologically active molecules. Like other plants, mosses are considered to be potential source of new biologically active compounds. The present study was designed to evaluate the The antimicrobial and antioxidant activities of extracts obtained from some moss species in Turkey antimicrobial and antioxidant activity of 8 moss species: Hypnum cupressiforme, Homalothecium sericeum, Thuidium delicatulum, Homalothecium lutescens, Homalothecium nitens, Leucodon sciuroides, Ctenidium molluscum, and Eurhynchium striatulum obtained from Turkey. Methods: The antimicrobial activity of extracts was investigated against four Gram (+) and six Gram (–) bacterial strains and three tested fungi. Total phenolic content (TPC), cupric reducing antioxidant capacity (CUPRAC), ferric reducing antioxidant power (FRAP), and DPPH radical scavenging activity assays were applied to determine the antioxidant activity. All moss extacts were found to be active against all the organisms except Homalothecium nitens. Especially, H. sericeum and E. striatulum showed the best antioxidant activity. The obtained results show that mosses may be used as possible natural antioxidant, antimicrobial agents to control various human, animal and plant diseases.
    Przemysł farmaceutyczny wciąż poszukuje nowych związków aktywnych. Podobnie jak inne rośliny, również mchy uważa się za potencjalne źródło nowych związków biologicznie czynnych. Przedstawione badania miały na celu określenie aktywności przeciwdrobnoustrojowej i przeciwutleniającej ośmiu gatunków mchów rosnących w Turcji: Hypnum cupressiforme, Homalothecium sericeum, Thuidium delicatulum, Homalothecium lutescens, Homalothecium nitens, Leucodon sciuroides, Ctenidium molluscum i Eurhynchium striatulum. Działanie przeciwdrobnoustrojowe wyciągów badano w stosunku do czterech szczepów bakterii Gram (+) i sześciu Gram (–) oraz w stosunku do trzech gatunków grzybów. Działanie przeciwutleniające badano oznaczając sumę zawartości związków fenolowych (TPC), zdolność redukowania miedzi (CUPRAC), zdolność redukowania jonów żelaza (FRAP) i oznaczając działanie przeciwutleniające z użyciem rodnika DPPH . Wszystkie badane wyciągi z mchów (za wyjątkiem Homalothecium nitens) wykazywały aktywność przeciwdrobnoustrojową w stosunku do testowanych mikroorganizmów. Najsilniejsze działanie przeciwutleniające wykazały wyciągi z H. sericeum i E. striatulum. Otrzymane wyniki wskazują, że można traktować mchy jako potencjalne naturalne źródła substancji antyoksydacyjnych i przeciwdrobnoustrojowych do zwalczania chorób ludzi, zwierząt i roślin.
    Źródło:
    Herba Polonica; 2015, 61, 4
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Particle Impact Angle, Erodent Particle Size and Acceleration Pressure on the Solid Particle Erosion Behavior of 3003 Aluminum Alloy
    Autorzy:
    Yıldıran, Y.
    Avcu, E.
    Şahin, A.
    Fidan, S.
    Yetiştiren, H.
    Sınmazçelik, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1195082.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Bx
    81.70.-q
    68.35.B-
    68.35.-p
    42.79.Ls
    68.37.Hk
    07.85.Nc
    Opis:
    This study aims to examine solid particle erosion behavior of 3003 aluminum alloy. 3003 aluminum alloy samples were eroded in erosion test rig under various particle impingement angles (15°, 30°, 45° and 60°) and acceleration pressures (1.5, 3 and 4 bar) by using 80 mesh and 180 mesh sized erodent particles (garnet). The erosion rates of aluminum alloy samples were calculated depending on the erosion parameters. The erosion rates of the samples have varied dramatically depending on particle impingement angle, acceleration pressure and erodent particle size. The maximum erosion rates were observed at 15° impingement angles at all acceleration pressures and particle sizes. Moreover, erosion rates of the samples were increased with increases in acceleration pressure at all particle impingement angles and particle sizes. On the other hand, erosion rates of the samples decrease with increase in erodent particle sizes. Hence, maximum erosion was observed when the aluminum alloy eroded at 15° impingement angle and 4 bar pressure by using 180 mesh erodent particles. Finally, the eroded surfaces of the samples were analyzed by using scanning electron microscope. The surfaces of the samples were also investigated by using energy dispersive X-ray analysis in scanning electron microscopy studies. Microcutting and microploughing erosion mechanisms were observed at 15° and 30° impingement angles, while deep cavities and valleys formed due to plastic deformation were observed at 45° and 60° impingement angles. Moreover, embedded erodent particles were clearly detected on the surfaces of the samples by energy dispersive X-ray analysis.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 523-525
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of natural minerals (zeolite and bentonite) for nitrogen compounds adsorption in different water temperatures suitable for aquaculture
    Autorzy:
    Sahin, D.
    Oz, M.
    Sertasi, E.
    Oz, U.
    Karsli, Z.
    Aral, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/10976.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2018, 71
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nanomechanical properties of different dental restorative materials
    Autorzy:
    Altan, H.
    Bilgic, F.
    Arslanoglu, Z.
    Kale, E.
    Köroğlu Kale, A.
    Altan, A.
    Sahin, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1068227.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.-x
    62.20.Qp
    Opis:
    The aim of this study is to determine the hardness and roughness of glass ionomer cement, glass carbomer, and compomer by nanoindentation. Three different dental restorative materials: glass ionomer cement, glass carbomer cement, and compomer were used. Disc specimens (10 mm × 1 mm) were prepared from each material using teflon mold. All specimens were light cured according to the manufacturer's instructions. The specimens were then mounted in polyacrilic resin. After grinding and polishing the specimens were stored in distilled water at 37°C for 1 day. The specimens were investigated using nanoindenter. The highest nanohardness was measured for glass ionomer cement and the lowest for glass carbomer. Regarding roughness, glass ionomer cement and compomer showed the highest mean values. Glass ionomer cement and compomer exhibited similar nanomechanical properties. Glass carbomer had superior ability to be polished up.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 394-396
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Manipulation of Exchange Coupling in Py/Co/Cr Multilayer Thin Films
    Autorzy:
    Aköz, M.
    Parlak, U.
    Şahin, Y.
    Tavşan, D.
    Tarcan, E.
    Öztürk, O.
    Tokdemir Öztürk, S.
    Erkovan, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401229.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.70.Cn
    75.50.Cc
    76.50.+g
    Opis:
    The main issue addressed in present study is exchange coupling modification between ferromagnetic layers through non-magnetic spacer layers using extra ultra-thin ferromagnetic layers (Co). In order to achieve this goal, we prepared Cr(50 Å) / Py(20 Å) / Co(5 Å) / Cr(7, 10, 13 Å) / Co(5 Å) / Py (30 Å) / Cr(50Å) / Si using magnetron sputtering at UHV conditions and characterized by Ferromagnetic Resonance (FMR) technique. As the present study results were compared to our previous study on (Py/Cr), the exchange coupling energy was increased ten times with the cobalt thin layer
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 992-994
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of Istanbul disaster information system
    Autorzy:
    Torun, M. K.
    Korkmaz, N.
    Karaman, H.
    Yagci, A.
    Yildiz, S. S.
    Ozkan, A.
    Sahin, M.
    Tari, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/225748.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    klęski żywiołowe
    zarządzanie kryzysowe
    Turcja
    natural disasters
    crisis management
    Turkey
    Źródło:
    Reports on Geodesy; 2006, z. 5/80; 527-536
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nano-Bioceramic Synthesis from Tropical Sea Snail Shells (Tiger Cowrie - Cypraea Tigris) with Simple Chemical Treatment
    Autorzy:
    Şahin, Y.
    Gündüz, O.
    Bulut, B.
    Özyeğin, L.
    Gökçe, H.
    Ağaoğulları, D.
    Chou, J.
    Kayalı, E.
    Ben-Nissan, B.
    Oktar, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401280.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.07.-b
    87.68.+z
    28.52.Fa
    Opis:
    In this study several bioceramic materials (i.e. hydroxyapatite, whitlockite) were prepared by using chemical synthesis method from sea snail shells (Tiger Cowrie - Cypraea Tigris), originated from Pacific Ocean. Marine shells usually present aragonite-calcite structures and generally, complicated and pressurized equipment is necessary to convert these structures into bioceramics. Instead of using complicated systems, a basic ultrasonic equipment and simple chemical synthesis method was used in the process. DTA analysis was performed to calculate the required amount of H₃PO₄ solution in order to set the appropriate stoichiometric ratio of Ca/P equal to 1.667 for HA bioceramic or to 1.5 for β-TCP bioceramic in the titration. The prepared batches were sintered at 800°C and 400°C for hydroxyapatite (HA) and β-tri calcium phosphate (β-TCP) forms respectively. X-ray diffraction analysis, scanning electron microscopy (SEM) and infrared observations (FTIR) were implemented for both TCP and HA bioceramics. By applying the chemical synthesis with basic ultrasonic equipment, this study proposes a simple way of production for nano-HA /TCP powders from a natural marine sources.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 1055-1058
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-24 z 24

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies