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Bulunan: 38 Adet 0.011 sn
Yayın Tarihi : 2018 ✕Koleksiyon : Metalurji ve Malzeme ... ✕
Koleksiyon [3]
İlgili Araştırmacılar [3]
Ambargo Durumu [1]
Tam Metin [2]
Yayın Türü [2]
Yazar/lar [19]
Atıf Dizini [2]
Konu Başlıkları [35]
Yayıncı [9]
Yayın Tarihi [1]
Yayın Dili [1]
Erişime Açık

Transverse momentum spectra and nuclear modification factors of charged particles in Xe–Xe collisions at √sNN = 5.44 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

Transverse momentum (pT) spectra of charged particles at mid-pseudorapidity in Xe–Xe collisions at √sNN = 5.44 TeV measured with the ALICE apparatus at the Large Hadron Collider are reported. The kinematic range 0.15 < pT < 50 GeV/c and |η| < 0.8 is covered. Results are presented in nine classes of collision centrality in the 0–80% range. For comparison, a pp reference at the collision energy of √s = 5.44 TeV is obtained by interpolating between existing pp measurements at √s = 5.02 and 7 TeV. The nuclear modification factors in central Xe–Xe collisions and Pb–Pb collisions at a similar center ...Daha fazlası

Diğer 2018 3 Görüntülenme
Erişime Açık

Freezing Range, Melt Quality, and Hot Tearing in Al-Si Alloys

ULUDAĞ, Muhammet | ÇETİN, Remzi | DIŞPINAR, Derya

In this study, three different aluminum-silicon alloys (A356, A413, and A380) that have different solidification morphology and solidification ranges were examined with an aim to evaluate the hot tearing susceptibility. T-shape mold and Constrained Rod Casting (CRC) mold were used for the characterization. Reduced Pressure Test (RPT) was used to quantify the casting quality by measuring bifilm index. It was found that bifilm index and solidification range have an important role on the hot tearing formation. As it is known, bifilms can cause porosity and in this case, it was shown that porosity ...Daha fazlası

Makale 2018 Springer Boston 4 Görüntülenme
Erişime Açık

Construction of an Amperometric Cholesterol Biosensor Based on DTP(aryl)aniline Conducting Polymer Bound Cholesterol Oxidase

ÇEVİK, Emre | CERİT, Alaaddin | GAZEL, Nilay | YILDIZ, Hüseyin Bekir

In this study, an amperometric cholesterol biosensor was constructed based on cholesterol oxidase immobilized on a conducting 4-(4H-dithienol[3,2-b:2’,3’d]pyrrole-4)aniline polymer, (DTP(aryl)aniline). Glassy carbon electrodes were covered with P(DTP(aryl)aniline) which is used for the wiring of enzyme to the electrode surface by using electro-polymerization. The electron transfer was successfully made by the bio-catalytic activity and possession of the unique morphology of the polymer allowed efficient immobilization of the cholesterol oxidase enzyme. Analytical performances, linear range, de ...Daha fazlası

Makale 2018 Electroanalysis (Wiley) 10 Görüntülenme
Erişime Açık

On the Interpretation of Melt Quality Assessment of A356 Aluminum Alloy by the Reduced Pressure Test: The Bifilm Index and Its Physical Meaning

ULUDAĞ, Muhammet | ÇETİN,Remzi | DIŞPINAR, Derya | TİRYAKİOĞLU, Murat

The oxide layer on liquid aluminum serves as a protective property to prevent the alloy from further oxidation. However, it has the potential to be a source of porosity when entrained into the bulk of the liquid. For this reason, oxides entrained into aluminum castings have been shown to degrade casting quality. In the current study, the effectiveness of the reduced pressure test in assessing the quality of A356 alloy melts has been investigated under various conditions obtained by changing six different melt parameters. Several metrics, including average pore size, number density of pores, bi ...Daha fazlası

Makale 2018 Springer International Publishing 7 Görüntülenme
Erişime Açık

Synthesis of Various Calix [4] arene Derivatives with Mercaptoalkyl Chains and Their Application in Removing Cr (VI) from Aqueous Solution

SAYIN, Serkan | YILDIZ, Hüseyin Bekir | EYMÜR, Serkan

Four different mercaptoalkyl-substituted calixarene derivatives (5,11,17, 23-tetra-tert-butyl-25,27-bis(3-mercaptopropoxyl)-26,28-dihydroxycalix [4]arene, 25,27-bis(3-mercaptopropoxyl)-26,28-dihydroxycalix[4]arene, 25,27-bis(5-mercaptopentanoxyl)-26,28-dihydroxycalix[4]areneand5,17di-tert-butyl-11,23-di-carboxyl-26,28-bis(3-mercaptopropoxyl)-25,27-dihydroxycalix[4]arene) were synthesized. Their structures were characterized by Fourier transform infrared spectroscopy (FTIR), 1H and 13C NMR spectroscopy, and elemental analysis techniques. Moreover, their extraction capabilities at different para ...Daha fazlası

Makale 2018 Polycyclic Aromatic Compounds (Taylor and Francis) 5 Görüntülenme
Erişime Açık

π0 and η meson production in proton-proton collisions at √s=8 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

An invariant differential cross section measure- ment of inclusive π 0 and η meson production at mid-rapidity in pp collisions at √s = 8 TeV was carried out by the ALICE experiment at the LHC. The spectra of π0 and η mesons were measured in transverse momentum ranges of 0.3 < pT < 35GeV/cand0.5 < pT < 35GeV/c, respectively. Next-to-leading order perturbative QCD cal- culations using fragmentation functions DSS14 for the π0 and AESSS for the η overestimate the cross sections of both neutral mesons, although such calculations agree with the measured η/π0 ratio within uncertainties. The results w ...Daha fazlası

Makale 2018 14 Görüntülenme
Erişime Açık

Neutral pion and η meson production in p–Pb collisions at √sNN = 5.02 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

Neutral pion and η meson invariant differential yields were measured in non-single diffractive p–Pb colli- sions at √sNN = 5.02 TeV with the ALICE experiment at the CERN LHC. The analysis combines results from three complementary photon measurements, utilizing the PHOS and EMCal calorimeters and the Photon Conversion Method. The invariant differential yields of π0 and η meson inclu- sive production are measured near mid-rapidity in a broad transverse momentum range of 0.3 < pT < 20 GeV/c and 0.7 < pT < 20 GeV/c, respectively. The measured η/π0 ratio increases with pT and saturates for pT > 4 G ...Daha fazlası

Makale 2018 2 Görüntülenme
Erişime Açık

Neutral pion and η meson production at midrapidity in Pb-Pb collisions at √sNN = 2.76 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

Neutral pion and η meson production in the transverse momentum range 1 < pT < 20 GeV/c have been measured at midrapidity by the ALICE experiment at the Large Hadron Collider (LHC) in central and semicentral Pb-Pb collisions at √sNN = 2.76 TeV. These results were obtained using the photon conversion method as well as the Photon Spectrometer (PHOS) and Electromagnetic Calorimeter detectors. The results extend the upper pT reach of the previous ALICE π0 measurements from 12 to 20 GeV/c and present the first measurement of η meson production in heavy-ion collisions at the LHC. The η/π0 ratio is si ...Daha fazlası

Makale 2018 4 Görüntülenme
Erişime Açık

Azimuthally-differential pion femtoscopy relative to the third harmonic event plane in Pb–Pb collisions at √sNN = 2.76 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

Azimuthally-differential femtoscopic measurements, being sensitive to spatio-temporal characteristics of the source as well as to the collective velocity fields at freeze out, provide very important information on the nature and dynamics of the system evolution. While the HBT radii oscillations relative to the second harmonic event plane measured recently reflect mostly the spatial geometry of the source, model studies have shown that the HBT radii oscillations relative to the third harmonic event plane are predominantly defined by the velocity fields. In this Letter, we present the first resu ...Daha fazlası

Makale 2018 5 Görüntülenme
Erişime Açık

Construction of conducting polymer/cytochrome C/thylakoid membrane based photo-bioelectrochemical fuel cells generating high photocurrent via photosynthesis

ÇEVİK, Emre | ÇARBAŞ, Buket | ŞENEL, Mehmet | YILDIZ, Hüseyin Bekir

In this study, a photo-bioelectrochemical fuel cell was constructed for photocurrent generation by illuminating the electrodes within an aqueous solution. In this purpose, gold electrode was coated with poly 4-(4H-Dithieno [3,2-b:2′,3′-d]pyrol-4-yl) aniline, P(DTP-Ph-NH2) conductive polymer fi lm by using electrochemical polymerization. Then, P(DTP-Ph-NH2) conductive polymer fi lm coated surface was electrochemically modi fi ed with cytochrome C which covalently linked onto the surface via bis-aniline functionality of the polymer fi lm and formed crosslinked-structure. The thylakoid membrane was a ...Daha fazlası

Makale 2018 Biosensors and Bioelectronics (Elsevier) 9 Görüntülenme
Erişime Açık

Anisotropic flow of identified particles in Pb-Pb collisions at √sNN = 5.02 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

The elliptic (v2), triangular (v3), and quadrangular (v4) flow coefficients of π±, K±, p+p, Λ+Λ, K0S, and the φ-meson are measured in Pb-Pb collisions at √sNN = 5.02 TeV. Results obtained with the scalar product method are reported for the rapidity range |y| < 0.5 as a function of transverse momentum, pT, at different collision centrality intervals between 0–70%, including ultra-central (0–1%) collisions for π±, K±, and p + p. For pT < 3 GeV/c, the flow coefficients exhibit a particle mass dependence. At intermediate transverse momenta (3 < pT < 8–10 GeV/c), particles show an approximate group ...Daha fazlası

Makale 2018 2 Görüntülenme
Erişime Açık

The ALICE Transition Radiation Detector: Construction, operation, and performance

KARASU UYSAL, Ayben | ALICE Collaboration

The Transition Radiation Detector (TRD) was designed and built to enhance the capabilities of the ALICE detector at the Large Hadron Collider (LHC). While aimed at providing electron identification and triggering, the TRD also contributes significantly to the track reconstruction and calibration in the central barrel of ALICE. In this paper the design, construction, operation, and performance of this detector are discussed. A pion rejection factor of up to 410 is achieved at a momentum of 1 GeV/c in p-Pb collisions and the resolution at high transverse momentum improves by about 40% when inclu ...Daha fazlası

Makale 2018 11 Görüntülenme
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