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Study of the Dalitz decay J/psi -> e(+)e(-)eta
No full textKolcu, Onur Buğra (Arel Author)We study the electromagnetic Dalitz decay J/psi -> e(+)e(-)eta and search for dielectron decays of a dark gauge boson (gamma') in J/psi -> gamma'eta with the two q decay modes eta -> gamma gamma and eta -> pi(+)pi(-)pi(0) using (1310.6 +/- 7.0) x 10(6) J/psi events collected with the BESIII detector. The branching fraction of J/psi -> e(+)e(-)eta is measured to be (1.43 +/- 0.04(stat) +/- 0.06(syst)) x 10(-5), with a precision that is improved by a factor of 1.5 over the previous BESIII measurement. The corresponding dielectron invariant mass dependent modulus square of the transition form factor is explored for the first time, and the pole mass is determined to be Lambda = 2.84 +/- 0.11(stat) +/- 0.08(syst) GeV/c(2). We find no evidence of gamma' production and set 90% confidence level upper limits on the product branching fraction B(J/psi -> gamma'eta) x B(gamma' -> e(+)e(-)) as well as the kinetic mixing strength between the standard model photon and gamma' in the mass range of 0.01 <= m(gamma') <= 2.4 GeV/c(2)
Revisiting Attachment to Parents and Depression Link in Adolescence: the Importance of Language Use and Emotion Regulation
No full textŞimşek, Ömer Faruk (Arel Author)Although past research has provided important information about the relationship between attachment and mental health during the period of adolescence, the role of intervening variables in this association has been neglected. The aim of the present study was to illuminate the association between adolescents' secure attachment to parents and mental health, i.e., emotion regulation and depression, and to focus on the mediating role of language use operationalized by the gap between experience and language. Three-hundred seventy-four adolescents (220 females, 154 males) participated in the study. The data was analyzed using structural equation modeling. The results provided support for the intervening role of language use and it was further shown that the relationship between language use and depression is mediated by emotion regulation. Language use and emotion regulation are potential mediators between attachment to parents and depression. The effects of problematic attachment experiences on attachment might be intervened by focusing on language use of adolescents, which in turn could improve insight
On the optimal solution of budgeted influence maximization problem in social networks
No full textThe budgeted influence maximization problem is a challenging stochastic optimization problem defined on social networks. In this problem, the objective is identifying influential individuals who can influence the maximum number of members within a limited budget. In this work an integer program that approximates the original problem is developed and solved by a sample average approximation (SAA) scheme. Experimental analyses indicate that SAA method provides better results than the greedy method without worsening the solution time performance. © 2017, Springer-Verlag Berlin Heidelberg.TEYDEB-1507-7150022This research has been supported by T?B?TAK (The Scientific and Technological Research Council of Turkey) under the Grant no: TEYDEB-1507-7150022
Observation of OZI-suppressed decays chi(cJ) -> omega phi
No full textDecays chi(cJ)(J = 0, 1, 2) -> omega phi are studied using (448.1 +/- 2.9) x 10(6)psi(3686) events collected with the BESIII detector in 2009 and 2012. In addition to the previously established chi(c0) -> omega phi, the first observation of chi(c1) -> omega phi is reported in this paper. The measured product branching fractions are B(psi(3686) -> gamma chi(c0)) x B(chi(c0) -> omega phi) = (13.83 +/- 0.70 +/- 1.01) x 10(-6) and B(psi(3686) -> gamma chi(c1)) x B(chi(c1) -> omega phi) = (2.67 +/- 0.31 +/- 0.27) x 10(-6), and the absolute branching fractions are B(chi(c0) -> omega phi) = (13.84 +/- 0.70 +/- 1.08) x 10(-5) and B(chi(c1) -> omega phi) = (2.80 +/- 0.32 +/- 0.30) x 10(-5). We also find strong evidence for chi(c2) -> omega phi with a statistical significance of 4.8 sigma, and the corresponding product and absolute branching fractions are measured to he B(psi(3686) -> gamma chi(c2)) x B(chi(c2) -> omega phi) = (0.91 +/- 0.23 +/- 0.12) x 10(-6) and B(chi(c2) -> omega phi) = (1.00 +/- 0.25 +/- 0.14) x 10(-5). Here, the first errors are statistical and the second ones systematic
Elektrohidrodinamik Atomizasyon (EHDA) Tekniği İle Sağlık Sektörüne Yönelik Polilaktik Asit (PLA) Nanopartiküllerinin Eldesi
No full text2019 Scientific Meeting on Electrical-Electronics and Biomedical Engineering and Computer Science, EBBT 2019 -- 24 April 2019 through 26 April 2019 --Polylactic acid (PLA) is a kind of environmental thermoplastic polymer. Aliphatic polyesters, such as PLA, are a biocompatible polymer with mechanical properties, transparencies and non-toxic properties. These properties are used in consumer products such as packaging, automobile, furniture, food, textile and pharmaceutical industry. In this study, PLA nanoparticle was produced by electrohydrodynamic atomization (EHDA) which is a nanotechnological method. The EHDA system produces micro or nanoparticles by providing an optimization network in the case of high pressure and controllable controllability. Structural properties of the produced nanoparticles (Fourier Transformed Infrared Spectroscopy (FTIR)), thermal (Differential Scanning Calorimeter (DSC)) and morphological (Field Emission Gun Scanning Electron Microscopy (FEGSEM)) characterization studies were made and their properties were determined. PLA nanoparticles with biodegradable properties can be used both as a master and as an additive in clean air filter, tissue engineering and biomedical applications. © 2019 IEEE
Observation of e(+) e(-) -> eta Y(2175) at center-of-mass energies above 3.7 GeV
No full textKolcu, Onur Buğra (Arel Author)The state Y(2175) is observed in the process e(+)e(-) -> eta Y(2175) with a statistical significance larger than 10 standard deviations using the data collected with the BESIII detector operating at the BEPCII storage ring at center-of-mass energies between 3.7 and 4.6 GeV. This is the first observation of the Y(2175) in this process. The mass and width of the Y(2175) are determined to be (2135 +/- 8 +/- 9) MeV/e(2) and (104 +/- 24 +/- 12) MeV, respectively, and the production cross section (sigma) of e(+)e(-) -> eta Y(2175) -> eta phi f(0)(980) -> eta phi pi(+)pi(-) is at the several hundred femtobarn level. No significant signal for the process e(+)e(-) -> eta'Y(2175) is observed and the upper limit on sigma(e(+)e(-) -> eta'Y(2175))/sigma(e(+)e(-) -> eta Y(2175)) is estimated to be 0.43 at the 90% confidence level. We also search for psi(3686) -> eta Y(2175). No significant signal is observed, indicating a strong suppression relative to the corresponding J/psi decay, in violation of the "129% rule"
Impacts of feeder failure statistics on EV-supported distribution system reliability improvement
No full text2019 IEEE Milan PowerTech, PowerTech 2019 -- 23 June 2019 through 27 June 2019 --Electric vehicle parking lots (EVPLs) create new alternatives for planning and operation of distribution systems with its aggregated EV potential and charging/discharging coordination. On the other hand, distributed storage support of EVPLs changes the distribution system topology because of bidirectional power flows. Therefore, distribution system reliability improvement through highly penetrated distributed energy resources (DERs) has got the attraction of power system operators. However, this improvement so does the operation philosophy of EVPL storage capacity are strongly correlated with the feeder failure statistics. The objective of this study is therefore devoted to the sensitivity of EV supported distribution system reliability improvement on the failure rate of feeder components, such as transformers, busbars and cables. Several case studies regarding the supporting status of EVPL are generated to quantify the impacts of the failure rate of these elements on distribution system reliability. The results will guide the utilities on how they can optimize the benefits of EVPL support in terms of system reliability. © 2019 IEEE.BAPVI. ACKNOWLEDGMENT The authors would like to express their appreciation to Istanbul Car Parking Corporation and Bosphorus Electric Distribution Corporation for providing statistical and technical data for the PLs and for the distribution grid, respectively. Electric Distribution Corporation for providing statistical and technical data for the PLs and for the distribution grid, respectively. This study is sponsored by BAP coordination unit of Istanbul Technical University-TURKEY
Sexual Counseling in Women With Primary Infertility and Sexual Dysfunction: Use of the BETTER Model
No full textKarakaş, Sevda (Arel Author)The aim of the study was to determine the effect of sexual counseling based on the BETTER model of female sexual health in infertile women with sexual dysfunction. This is an experimental, prospective study carried out in an infertility clinic. The study included 70 women with primary infertility, of whom 35 were in the experimental group and 35 were in the control group. The Female Sexual Function Scale and the Golombok-Rust Sexual Satisfaction Scale were administered at the initial assessment and the final assessment. Two sessions of sexual counseling were given to the experimental group based on the BETTER model. A routine follow-up of the control group was performed. After the counseling, there was a statistically significant improvement in the mean scores for Female Sexual Function Scale and the total scores for the Golombok-Rust Sexual Satisfaction Scale and its subscales in the experimental group compared to the control group. The women who had been infertile for six years and more had less improvement in sexual dysfunction and sexual dissatisfaction. The sexual counseling given in accordance with the BETTER model was found to be effective in improvement of sexual function and sexual satisfaction in the women with one to two years of infertility
Realization of Dielectric Sheets for Gain Improvement of Ultra-Wideband Horn Antennas Using 3D Printer Technology
No full textWOS: 000476623500019In this work, 3D printing technology had been used to prototyped 10 dielectric sheets with relative dielectric constant of 2.5 for gain improvement of a TEM horn antenna. By loading the 3D printed dielectric sheets to the aperture of the horn antenna it is achieved to improve the radiation performance of the antenna over an ultra-wide operation band of 2-13 GHz. Here the Periodic dielectric sheets are designed to function similarly to a dielectric lens for focusing the incoming electromagnetic waves to increase directivity properties, while keeping their mismatching characteristics with less size and low manufacturing cost compared to its counterpart lens designs. The dielectric sheets had been prototyped via the use of 3D printing technology for experimental measurements. The measured performance of the proposed 3D printed dielectric loaded TEM horn antenna is compared with its counterpart ultra-wide band gain improvement methods for horn antennas in literature. From the measured results of the prototyped module, not only the proposed 3D printed dielectric sheets are smaller and have lower cost compared to their counterpart designs but also achieves to improve the gain characteristics of the antenna design over an ultra-wide band operation band without a distortion on antenna's S-11 characteristics
Observation of the Decay X (3872) ??0?c1 (1P)
No full textPubMed ID: 31172749Using a total of 9.0 fb-1 of e+e- collision data with center-of-mass energies between 4.15 and 4.30 GeV collected by the BESIII detector, we search for the processes e+e-??X(3872) with X(3872)??0?cJ for J=0, 1, 2. We report the first observation of X(3872)??0?c1, a new decay mode of the X(3872), with a statistical significance of more than 5? for all systematic fit variations. Normalizing to the previously established process e+e-??X(3872) with X(3872)??+?-J/?, we find B(X(3872)??0?c1)/B(X(3872)??+?-J/?)=0.88-0.27+0.33±0.10, where the first error is statistical and the second is systematic. We set 90% confidence level upper limits on the corresponding ratios for the decays to ?0?c0 and ?0?c2 of 19 and 1.1, respectively. © 2019 authors. Published by the American Physical Society