Observation of ^B+→^K+ηγ

Nishida, S.,Abe, K.,Aihara, H.,Akatsu, M.,Asano, Y.,Aulchenko, V.,Aushev, T.,Bahinipati, S.,Bakich, A.M.,Ban, Y.,Banerjee, S.,Bedny, I.,Bitenc, U.,Bizjak, I.,Blyth, S.,Bondar, A.,Bozek, A.,Brač,k Elsevier 2005 Physics letters: B Vol.610 No.1

<P><B>Abstract</B></P><P>We report measurements of radiative <I>B</I> decays with Kηγ final states, using a data sample of 253 <SUP>fb−1</SUP> recorded at the ϒ(4S) resonance with the Belle detector at the KEKB <SUP>e+</SUP><SUP>e−</SUP> storage ring. We observe <SUP>B+</SUP>→<SUP>K+</SUP>ηγ for the first time with a branching fraction of (8.4±1.5(stat)−0.9+1.2(syst))×<SUP>10−6</SUP> for <SUB>MKη</SUB><2.4 GeV/<SUP>c2</SUP>, and find evidence of <SUP>B0</SUP>→<SUP>K0</SUP>ηγ. We also search for B→K3∗(1780)γ.</P>

Determination of the stage and grade of periodontitis according to the current classification of periodontal and peri-implant diseases and conditions (2018) using machine learning algorithms

Kübra Ertaş,Ihsan Pence,Melike Siseci Cesmeli,Zuhal Yetkin Ay 대한치주과학회 2023 Journal of Periodontal & Implant Science Vol.53 No.1

Purpose: The current Classification of Periodontal and Peri-Implant Diseases and Conditions, published and disseminated in 2018, involves some difficulties and causes diagnostic conflicts due to its criteria, especially for inexperienced clinicians. The aim of this study was to design a decision system based on machine learning algorithms by using clinical measurements and radiographic images in order to determine and facilitate the staging and grading of periodontitis. Methods: In the first part of this study, machine learning models were created using the Python programming language based on clinical data from 144 individuals who presented to the Department of Periodontology, Faculty of Dentistry, Süleyman Demirel University. In the second part, panoramic radiographic images were processed and classification was carried out with deep learning algorithms. Results: Using clinical data, the accuracy of staging with the tree algorithm reached 97.2%, while the random forest and k-nearest neighbor algorithms reached 98.6% accuracy. The best staging accuracy for processing panoramic radiographic images was provided by a hybrid network model algorithm combining the proposed ResNet50 architecture and the support vector machine algorithm. For this, the images were preprocessed, and high success was obtained, with a classification accuracy of 88.2% for staging. However, in general, it was observed that the radiographic images provided a low level of success, in terms of accuracy, for modeling the grading of periodontitis. Conclusions: The machine learning-based decision system presented herein can facilitate periodontal diagnoses despite its current limitations. Further studies are planned to optimize the algorithm and improve the results.

Influence of deposition conditions on nanostructured InSe thin films

Kübra Çınar Demir,Emre Demir,Seniye Yüksel,Cevdet Coşkun 한국물리학회 2019 Current Applied Physics Vol.19 No.12

In this study, nanostructured indium selenide (InSe) thin films were deposited on Indium tin oxide (ITO)-coated glass substrate using electrochemical deposition (ECD) from aqueous solution containing In(SO4)3.H2O and SeO2. The effects of deposition potential (−0.70 to −1.35 V), time (30-3600 s), temperature (25-80 °C) and pH (2.58 for A samples; 2 for B samples and 1.45 for C samples) on growth of the InSe thin films were examined in terms of their structural, morphological and optical properties. X-ray diffraction (XRD) analysis confirmed that the InSe thin films are in polycrystalline structure. It was found that the values of grain size decreased and the full width half maximum (FWHM) values increased with the increasing deposition potential. According to the absorption measurements, optical properties of the thin films varied with changes in deposition conditions. Based on the atomic force microscopy (AFM) and the scanning electron microscopy (SEM) images, surface morphology of the thin films was influenced by deposition potential and pH of the electrolyte, and nonhomogeneous depositions distributed across the entire surface were observed. In addition, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and fourier transform infrared spectroscopy (FT-IR) analyses were used to further examine crystal quality, vibration, chemical binding conditions, In/Se orientation and structure of the prepared InSe thin films. When Raman results are examined, the B12 sample shows a more intensity and narrow peak at 248 cm−1. XPS measurements sowed that A6 sample exhibited more growth in low potential for a long time and better film stoichiometry compared to the other three samples. Also, FT-IR studies prove the presence of InSe. According to the results, the film did not form at low temperatures and short times. However, the film formation began with the increasing deposition temperature and time at the low potential value of −0.730 V. But, it is clear that a high quality film can be obtained in cathodic potential with −1.3 V and shorter deposition time with 300 s at room temperature respectively. Overall results showed that the high quality thin films can be obtained by the ECD technique. However, deposition conditions must be sensitively adjusted to control morphology of the electrodeposited nanoparticles.

Densification and properties of in-situ synthesized ZrB2- SiC composities from ZrO2, B4C and SiC system

Kübra Gürcan 한양대학교 세라믹연구소 2017 Journal of Ceramic Processing Research Vol.18 No.4

Zirconium diboride-silicon carbide (ZrB2-SiC) ceramics were in-situ synthesized and densified by the spark plasma sintering(SPS) method using ZrO2, B4C and SiC as starting powders. Both synthesis and densification processes were successfullyaccomplished in a single SPS cycle with one step heating schedules which were designed by considering thermodynamiccalculations made by Factsage software. One step synthesis/densification schedule at 1950 oC with a 30 min hold time under50 MPa uniaxial pressure lead to obtain ZrB2-SiC ceramics up to 93% of its theoretical density. Considering the literature,low hardness values (max. 17.55 GPa) were achieved which were directly attributed to the low bonding between ZrB2 and SiCgrains in terms of the residual stresses occurred during the synthesis and cooling steps. Fracture toughness of the ceramics was4.12 MPa.m1/2 and crack deflection and microcracking were believed to be primary toughening mechanisms of ZrB2-SiCcomposites.

Effect Neonatal Ketamine Treatment on Exploratory and Anxiety-like Behaviours in Adulthood

Kübra Akillioglu,Mustafa Karadepe 대한정신약물학회 2021 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.19 No.1

Objective: In this study, we evaluated the effect of neonatal ketamine exposure on anxiety-like and exploratory behaviours in adult the Balb/c and C57BL/6 strains of mice which anxiety responses are different. Methods: Ketamine was administered at two different doses single dose (10, 20 mg/kg, 0.1 ml/10 g body weight, intraperitoneally) and repeated doses (10, 20 mg/kg every 240 minutes; thrice times) on the 7th postnatal day to male Balb/c and C57BL/6 mice. In adulthood, open-field (OF) and elevated plus maze (EPM) apparatuses were used to evaluate exploratory and anxiety-like behaviour. Results: In the C57BL/6 mice, the 20 mg/kg single dose decreased open-arm time and total-arm entries in EPM and increased time of central latency and decreased distance travelled in OF. Both the 10 and 20 mg/kg repetitive doses increased time of central latency and decreased time spent in the centre, frequency of rearing and centre crossing in OF and decreased open-arm time, total-arm entries, number of open-arm entries in EPM. The 20 mg/kg repetitive dose decreased number of head dipping behaviours in EPM. In the Balb/c mice, both the single and repetitive 10−20 mg/kg doses had no significant effect on anxiety-like and exploratory behaviours. Conclusion: There were no significant differences in anxiety-like and exploratory behaviour in different strains by the single 10 mg/kg dose. However, in the C57BL/6 mice, both the single and repetitive 20 mg/kg doses and the 10 mg/kg repetitive dose increased anxiety-like behaviour and decreased exploratory behaviour in EPM and OF. In conclusion, hereditary factors may be effective on the effect of neonatal ketamine treatment on anxiety-like and exploratory behaviour.

Observation ofB0→pp¯K*0with a LargeK*0Polarization

Chen, J.-H.,Wang, M.-Z.,Adachi, I.,Aihara, H.,Arinstein, K.,Aulchenko, V.,Aushev, T.,Bakich, A. M.,Balagura, V.,Barberio, E.,Bay, A.,Bedny, I.,Belous, K.,Bitenc, U.,Bondar, A.,Bozek, A.,Brač,ko, American Physical Society 2008 Physical review letters Vol.100 No.25

<P>Using a 492 fb{-1} data sample collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{+}e{-} collider, we observe the decay B{0}-->ppK*0 with a branching fraction of (1.18{-0.25}{+0.29}(stat)+/-0.11(syst))x10{-6}. We study the decay dynamics of B{0}-->ppK*0 and compare with B{+}-->ppK*+. The K*0 meson is found to be almost 100% polarized (with a fraction of (101+/-13+/-3)% in the helicity zero state), while the K*+ meson has a (32+/-17+/-9)% fraction in the helicity zero state. The direct CP asymmetries for B{0}-->ppK*0 and B{+}-->ppK*+ are measured to be -0.08+/-0.20+/-0.02 and -0.01+/-0.19+/-0.02, respectively. In addition, we report improved measurements of the branching fractions B(B{+}-->ppK*+)=(3.38{-0.60}{+0.73}+/-0.39)x10{-6} and B(B{0}-->ppK{0})=(2.51{-0.29}{+0.35}+/-0.21)x10{-6}, which supersede our previous measurements.</P>

Effects of Microbial Transglutaminase on Physicochemical, Microbial and Sensorial Properties of Kefir Produced by Using Mixture Cow’s and Soymilk

Hasan Temiz,Kübra Dağyıldız 한국축산식품학회 2017 한국축산식품학회지 Vol.37 No.4

The objective of this research was to investigate the effects microbial transglutaminase (m- TGs) on the physicochemical, microbial and sensory properties of kefir produced by using mix cow and soymilk. Kefir batches were prepared using 0, 0.5, 1 and 1.5 Units m-TGs for per g of milk protein. Adding m-TGs to milk caused an increase in the pH and viscosity and caused a decrease in titratable acidity and syneresis in the kefir samples. Total bacteria, lactobacilli and streptococci counts decreased, while yeast counts increased in all the samples during storage. Alcohols and acids compounds have increased in all the samples except in the control samples, while carbonyl compounds have decreased in all the samples during storage (1-30 d). The differences in the percentage of alcohols, carbonyl compounds and acids in total volatiles on the 1st and the 30th d of storage were observed at 8.47-23.52%, 6.94-25.46% and 59.64-63.69%, respectively. The consumer evaluation of the kefir samples showed that greater levels of acceptability were found for samples which had been added 1.5 U m-TGs for per g of milk protein.

Superior Vena Cava Flow in Children With Attention Deficit Hyperactivity Disorder

Muhammed Karabulut,Kübra Yıldırım 대한신경정신의학회 2023 PSYCHIATRY INVESTIGATION Vol.20 No.9

Objective Attention deficit/hyperactivity disorder (ADHD), whose definition, diagnosis and treatment has been the subject of debate in the scientific community for a long time, is the most common neurobehavioral disorder in childhood. There are many studies on the pathophysiology of attention deficit. However, there is no study in the literature based on direct or indirect measurement of cerebral venous circulation in ADHD, and the effect of methylphenidate (MPH) treatment on cerebral venous circulation. Therefore, it was aimed to noninvasively measure superior vena cava (SVC) flow, which is an indirect indicator of cerebral venous flow, by transthoracic echocardiography in patients with ADHD.Methods In the study, 44 healthy children, and 40 ADHD patients who were planned to start on osmotic-release oral system (OROS)- MPH were included. SVC flows were measured in healthy children and before and after drug therapy of ADHD patients.Results SVC flow was found to be higher in ADHD patients compared to healthy children. A significant decrease was found in SVC flow of ADHD patients after OROS-MPH treatment. There was no decrease in SVC flow of patients who did not respond adequately to MPH treatment.Conclusion This first study of SVC flow in children with ADHD showed that ADHD was associated with increased SVC flow and MPH treatment had a reducing effect on this increased SVC flow. We believe that noninvasive, easily measurable, and reproducible SVC flow may be a new focus of interest for future comprehensive studies as a biomarker to support clinical evaluation in the diagnosis and treatment follow-up of ADHD patients.

Visual and Auditory Reaction Times of Patients with Opioid Use Disorder

Sema Baykara,Kübra Alban 대한신경정신의학회 2019 PSYCHIATRY INVESTIGATION Vol.16 No.8

Objective Reaction time is defined as the time from the start of a stimulus to the start of the voluntary movement. Time plays an important role in undertaking daily living activities. Reaction time is an important factor in respect of both quality of life and of capabilities demonstrated in the work environment. Alcohol and some addictive substances have effect on RT. The aim of this study was to compare the visual and auditory reaction times of patients with opioid use disorder with healthy control subjects. Methods The study was applied to two groups as the opioid use disorder group and the control group. A Sociodemographic and Clinical Data Form was prepared for each patient including age, gender, marital status and education level. Using a computer program the response to visual screen color change (red/blue) and to an auditory ‘beep’ sound of the computer system were recorded. The Student’s ttest was applied as a statistical method. Results The results showed longer reaction times in the patients with opioid use disorder. Conclusion To add improving reaction time approaches in opioid use disorder treatment may contribute to treatment by increasing quality of life and work performance.

Evaluation of Molasses as a Green Reducing Agent in Sulfur Dyeing

Meliha Oktav Bulut,Kübra Çelik 한국섬유공학회 2020 Fibers and polymers Vol.21 No.9

The aim of coloration for a textile material is to achieve high-quality dyed fabric with good levelness, fastness, andecological and economical process. In this study, the potential use of molasses as an ecological reducing agent was evaluatedfor CI Leuco Sulfur Black 1 with respect to the redox potential values of the dyeing liquid, dyeability, fastness values, andwaste liquid parameters. It was concluded that molasses can be used instead of commercial products in the exhaustionmethod and is easily applicable for bulk processes in dyeing mills. Furthermore, the color yield can be improved byincreasing the absorption value and impregnation temperature and by using mercerized fabric in the pad-dyeing method.