Mühendislik ve Mimarlık FakültesiFaculty of Engineering and Architecturehttp://hdl.handle.net/20.500.12294/4142019-03-26T22:28:22Z2019-03-26T22:28:22ZMulti-objective fuzzy parallel machine scheduling problems under fuzzy job deterioration and learning effectsArık, Oğuzhan Ahmethttp://hdl.handle.net/20.500.12294/13652019-03-24T00:02:16Z2018-01-01T00:00:00ZMulti-objective fuzzy parallel machine scheduling problems under fuzzy job deterioration and learning effects
Arık, Oğuzhan Ahmet
This paper investigates a multi-objective parallel machine scheduling problem under fully fuzzy environment with fuzzy job deterioration effect, fuzzy learning effect and fuzzy processing times. Due dates are decision variables for the problem and objective functions are to minimise total tardiness penalty cost, to minimise earliness penalty cost and to minimise cost of setting due dates. Due date assignment problems are significant for Just-in-Time (JIT) thought. A JIT company may want to have optimum schedule by minimising cost combination of earliness, tardiness and setting due dates. In this paper, we compare different approaches for modelling fuzzy mathematical programming models with a local search algorithm based on expected values of fuzzy parameters such as job deterioration effect, learning effect and processing times.
Arık, Oğuzhan Ahmet
2018-01-01T00:00:00ZMeasurement of the integrated Luminosities of cross-section scan data samples around the psi(3770) mass regionKolcu, Onur Buğrahttp://hdl.handle.net/20.500.12294/13642019-03-24T00:02:08Z2018-01-01T00:00:00ZMeasurement of the integrated Luminosities of cross-section scan data samples around the psi(3770) mass region
Kolcu, Onur Buğra
To investigate the nature of the psi(3770) resonance and to measure the cross section for e(+)e(-) -> D (D) over bar, a cross-section scan data sample, distributed among 41 center-of-mass energy points from 3.73 to 3.89 GeV, was taken with the BESIII detector operated at the BEPCII collider in the year 2010. By analyzing the large angle Bhabha scattering events, we measure the integrated luminosity of the data sample at each center-of-mass energy point. The total integrated luminosity of the data sample is 76.16 +/- 0.04 +/- 0.61 pb(-1), where the first uncertainty is statistical and the second systematic.
Kolcu, Onur Buğra
2018-01-01T00:00:00ZMeasurement of e(+)e(-) -> D(D)over-bar cross sections at the psi(3770) resonanceKolcu, Onur Buğrahttp://hdl.handle.net/20.500.12294/13622019-03-24T00:01:58Z2018-01-01T00:00:00ZMeasurement of e(+)e(-) -> D(D)over-bar cross sections at the psi(3770) resonance
Kolcu, Onur Buğra
We report new measurements of the cross sections for the production of D (D) over bar final states at the psi(3770) resonance. Our data sample consists of an integrated luminosity of 2.93 fb(-1) of e(+)e(-) annihilation data produced by the BEPCII collider and collected and analyzed with the BESIII detector. We exclusively reconstruct three D-0 and six D+ hadronic decay modes and use the ratio of the yield of fully reconstructed D (D) over bar events ("double tags") to the yield of all reconstructed D or (D) over bar mesons ("single tags") to determine the number of D-0(D) over bar (0) and D+D- events, benefiting from the cancellation of many systematic uncertainties. Combining these yields with an independent determination of the integrated luminosity of the data sample, we find the cross sections to be sigma(e(+)e(-) -> D-0(D) over bar (0-) )=(3.615 +/- 0.010 +/- 0.038) nb and sigma(e(+)e(-) -> D+D-)=(2.830 +/- 0.011 +/- 0.026) nb, where the uncertainties are statistical and systematic, respectively.
Kolcu, Onur Buğra
2018-01-01T00:00:00ZDalitz plot analysis of the decay omega -> pi(+) pi(-) pi(0)Kolcu, Onur Buğrahttp://hdl.handle.net/20.500.12294/13612019-03-24T00:02:14Z2018-01-01T00:00:00ZDalitz plot analysis of the decay omega -> pi(+) pi(-) pi(0)
Kolcu, Onur Buğra
Using a low-background sample of 2.6 x 10(5) J/psi -> omega eta(omega -> pi(+) pi(-) pi(0), eta -> gamma gamma) events, about 5 times larger statistics than previous experiments, we present a Dalitz plot analysis of the decay omega -> pi(+) pi(-) pi(0). It is found that the Dalitz plot distribution differs from the pure P-wave phase space with a statistical significance of 18.9 sigma. The parameters from the fit to data are in reasonable agreement with those without the cross-channel effect within the dispersive framework, which indicates that the cross-channel effect in omega -> pi(+) pi(-) pi(0) is not significant.
Kolcu, Onur Buğra
2018-01-01T00:00:00Z