1,061 research outputs found
Top quark spin in ep collision
We discuss the degree of spin polarization of single top quarks produced via
fusion process in collision at TESLA+HERAp and CLIC+LHC energies
and 5.3 TeV. A description on how to combine the cross sections
of and processes is given.
-beam direction is taken to be the favorite top quark spin decomposition
axis in its rest frame and it is found to be comparable with the ones in
collision. It is argued that theoretical simplicity and experimental clearness
are the advantage of collision.Comment: 2 eps figure
Integer programming based solution approaches for the train dispatching problem
Railroads face the challenge of competing with the trucking industry in a fastpaced environment. In this respect, they are working toward running freight trains on schedule and reducing travel times. The planned train schedules consist of departure and arrival times at main stations on the rail network. A detailed timetable, on the other hand, consists of the departure and arrival times of each train in each track section of its route. The train dispatching problem aims to determine detailed timetables over a rail network in order to minimize deviations from the planned schedule. We provide a new integer programming formulation for this problem based on a spacetime network; we propose heuristic algorithms to solve it and present computational results of these algorithms. Our approach includes some realistic constraints that have not been previously considered as well as all the assumptions and practical issues considered by the earlier works
Top Quark Spin Polarization in e \gamma Collision
We investigate the degree of spin polarization of single top quarks in the
collision via the process
with center of mass energies =0.5, 1 and 1.5 TeV of the parental
linear collider. Dominant spin fractions and spin asymmetries for
the various top quark spin bases are investigated. We show that -beam
direction is the favorite top quark spin decomposition axis. It is found to be
comparable with the ones in and collisions.Comment: 5 pages, 3 figure
Reliability and validity of the Turkish version of the Performance-Oriented Mobility Assessment I
The Performance-Oriented Mobility Assessment (POMA)-I is widely used assessment tool for evaluation of balance and gait properties. The aim of this study was to translate POMA-I to Turkish and to assess its reliability and validity. People with amputated lower extremities using prosthetics, those who underwent orthopedic surgery within the last 6 months, those dependent on wheel chairs and also bed-ridden patients, subjects with dementia and Alzheimer's disease, and illiterate people were excluded. After translation into Turkish, the Turkish version of the scale was applied on the participants at 2-week intervals. Volunteers ≥65 years of age were enrolled in the study. Internal consistencies of POMA subscale scores of postural balance and gait, and total score were calculated using Cronbach's α coefficient. The Turkish version was evaluated with respect to inter- and intrarater reliability and test-retest reliability intraclass correlation coefficient (ICC). For validation, Pearson's correlation coefficient between POMA and Berg Balance Scale (BBS) and Timed Up and Go Test (TUGT) was estimated. Eighty participants enrolled in the study with a mean age of 76. 5 ± 6. 75 years. In the reliability evaluation of the scale, considering postural balance, gait, and total score, Cronbach's α coefficients were found to be 0. 72, 0. 83, and 0. 88, respectively. ICCs were detected above 0. 70 for test-retest reliability and also for interrater and intrarater reliability. In validation study POMA total score had a strong positive correlation with BBS total score (r = 0. 86, p<0. 0001), and also a negative correlation with TUGT (r = -0. 75, p < 0. 0001). According to the results of this study, the Turkish version of the POMA-I scale has been found to be a reliable and a valid scale for elderly Turkish people. © 2012 European Group for Research into Elderly and Physical Activity (EGREPA)
Nanoscale tunnel field effect transistor based on a complex oxide lateral heterostructure
We demonstrate a tunnel field effect transistor based on a lateral
heterostructure patterned from an electron gas.
Charge is injected by tunneling from the /
contacts and the current through a narrow channel of insulating
is controlled via an electrostatic side gate. Drain-source
I/V-curves have been measured at low and elevated temperatures. The transistor
shows strong electric-field and temperature-dependent behaviour with a steep
sub-threshold slope %of up to as small as and a
transconductance as high as . A fully
consistent transport model for the drain-source tunneling reproduces the
measured steep sub-threshold slope.Comment: 20 pages, 6 figures, Supplementary material: 4 pages, 2 figure
CHANGEABLE DESIGNS IN PRESCHOOL EDUCATION ENVIRONMENTS: SUPPORTING SENSORY DEVELOPMENT AND CREATIVITY
Preschool education has special importance in the development processes of children at 3-6 age, which is the period when the foundations of individual development are established. In this period, the development of children is supported by education and appropriate environmental conditions, and in this context, the quality of the physical environment has great significance in education process. Today, the development of creative thinking of individuals is considered as one of the conditions which improve the standards of societies. Since creative thinking is significantly developed and formed in preschool period, the improvement of children's creativity is considered as one of the objectives of preschool education. In this context, proposes a design approach taking changeability as its basis to support creative thinking of children in preschool environments. This paper is based on the findings of a doctorate thesis, integrating preschool education and architecture, completed by B. Ece Şahin at Uludağ University Department of Architecture, under the supervision of Prof. Dr. Neslihan Dostoğlu. The research was carried out with 30 children of age 5 in three public kindergartens in Bursa. Methods used in the study can be described as; discussions through the images of changeable toys, watching a movie about changeability, drawing a desired classroom and discussions held during a computer game where the action of change is experienced. In the research, it has been observed that changeable designs, support mental activity by stimulating feelings, encourage to think differently and to propose new ideas. Changeable designs can be consider as the products of design which trigger imagination. In this context, changeability can evaluate a parameter in designing education environments in order to support creativity in preschool years. Article visualizations
Unparticle Physics in the Moller Scattering
We investigate the virtual effects of vector unparticles in the Moller
scattering. We derive the analytic expression for scattering amplitudes with
unpolarized beams. We obtain 95% confidence level limits on the unparticle
couplings and with integrated luminosity of
and and 500 GeV energies. We show
that limits on are more sensitive than .Comment: 10 pages, 5 figures, 4 table
Light-weight and flexible Ni-doped CuO (Ni:CuO) thin films grown using the cost-effective SILAR method for future technological requests
Products based on nanostructured flexible thin films, which are anticipated to make their way into our lifetimes in the near future. Therefore, nanostructured metal-oxide thin-film materials grown on flexible substrates are anticipated to meet emerging technological requests. In this article, we present a promising light-weight and flexible thin-film material using un-doped and Ni-doped CuO samples. Ni:CuO flexible thin-film materials were fabricated by using the cost-effective SILAR method on cellulose acetate substrates and the effects of both Ni doping and bending on the change in electrical and optoelectronic performances were investigated. It is observed that Ni doping has a great impact on the main physical properties of flexible CuO samples. The optical bandgap value of the un-doped CuO film improves with increasing Ni ratio in the growth bath. Also, sheet resistance values of the un-doped and Ni:CuO samples are a little affected due to bending of samples for bending radius ~ 20 mm. These flexible all solution-processed nanostructured CuO samples are promising candidates for use in future optoelectronic applications
A Study of Students’ Loneliness Levels and Their Attachment Styles
The purpose of this study was to examine the relationship between loneliness levels and attachment styles of university students. In this research, it was investigated whether the attachment styles differed in terms of variables such as gender, class, place of stay, socio-economic level of their family, parental education levels, counterpart friendship relations, number of siblings, whether to receive psychological help or not. This research was conducted as a relational search. A total of 247 university students selected randomly formed the sample of the research. The results of the research can be summarized as follows; Loneliness levels of those who perceive the socioeconomic status as low and those who didn't get psychological help are found to be higher. Male students and students who get psychological help have higher scores on secure attachment. According to the results of the research there’s a low negative correlation between the loneliness levels of students and dismissing attachment style, a low positive correlation between the loneliness level and preoccupied attachment style, and a low negative correlation between the loneliness level and secure attachment style
Acute brucella melitensis M16 infection model in mice treated with tumor necrosis factor-alpha inhibitors
Introduction: There is limited data in the literature about brucellosis related to an intracellular pathogen and anti-tumor necrosis factor alpha (anti-TNFα) medication. The aim of this study was to evaluate acute Brucella infections in mice receiving anti-TNFα drug treatment. Methodology: Anti-TNFα drugs were injected in mice on the first and fifth days of the study, after which the mice were infected with B. melitensis M16 strain. Mice were sacrificed on the fourteenth day after infection. Bacterial loads in the liver and spleen were defined, and histopathological changes were evaluated. Results: Neither the liver nor the spleen showed an increased bacterial load in all anti-TNFα drug groups when compared to a non-treated, infected group. The most significant histopathological findings were neutrophil infiltrations in the red pulp of the spleen and apoptotic cells with hepatocellular pleomorphism in the liver. There was no significant difference among the groups in terms of previously reported histopathological findings, such as extramedullary hematopoiesis and granuloma formation. Conclusions: There were no differences in hepatic and splenic bacterial load and granuloma formation, which indicate worsening of the acute Brucella infection in mice; in other words, anti-TNFα treatment did not exacerbate the acute Brucella spp. infection in mice. © 2015 Kutlu et al
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