cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effects of Li Doping on Superconducting Properties of Citrate Gel Prepared Y1-xLixBa2Cu3O7-d Compound
Creators: name: Moghadam, Mahshid Amiri
name: Gashmard, Hassan
name: Hosseini, Seyed Sajjad
name: Shakeripour, Hamideh
name: Salamati, Hadi
Publisher: name: arXiv
Year: 2024
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The Y1-xLixBa2Cu3O7-d polycrystalline bulk superconductors doped with Li substituting at the Y site at different concentrations (x = 0, 0.01, 0.02, 0.1) were prepared using the citrate-gel method to study the effects of doping on the superconducting temperature and critical current density. The question was whether Li addition characterized by a high Debye frequency would have any positive effects on Tc. The optimum citrate-gel and heat treatment conditions were identified as those yielding samples with a maximum grain size on the order of 50 micro.m (up to the optimum Li-doping level, x=0.01). Li substitution at the Y site was verified by structural, electrical, and magnetic measurements of the produced samples, whereas X-ray diffraction (XRD) analysis revealed the formation of a pure phase with no visible impurity phases. Moreover, AC magnetic susceptibility measurements showed no increase in the superconducting transition temperature Tc, consistent with the predicted results obtained by machine learning method, although it was theoretically expected to increase owing to the high Debye frequency of Li. This observation is consistent with magnetic coupling models for pairing mechanism in cuprates. Finally, because of the optimum conditions of the preparation procedure, nearly identical values of the critical current density (Jc) were recorded for samples with different Li doping levels (up to the optimum Li doping level). It was found that improved compound preparation conditions would have a critical and extensive effect on Jc enhancement, with nearly no Tc suppression.
Black hole superradiance of self-interacting scalar fields
Creators: name: Baryakhtar, Masha
name: Galanis, Marios
name: Lasenby, Robert
name: Simon, Olivier
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Black hole superradiance is a powerful probe of light, weakly-coupled hidden sector particles. Many candidate particles, such as axions, generically have self-interactions that can influence the evolution of the superradiant instability. As pointed out in arXiv:1604.06422 in the context of a toy model, much of the existing literature on spin-0 superradiance does not take into account the most important self-interaction-induced processes. These processes lead to energy exchange between quasi-bound levels and particle emission to infinity; for large self-couplings, superradiant growth is saturated at a quasi-equilibrium configuration of reduced level occupation numbers. In this paper, we perform a detailed analysis of the rich dynamics of spin-0 superradiance with self-interactions, and the resulting observational signatures. We focus on quartic self-interactions, which dominate the evolution for most models of interest. We explore multiple distinct regimes of parameter space introduced by a non-zero self-interaction, including the simultaneous population of two or more bound levels; at large coupling, we confirm the basic picture of quasi-equilibrium saturation and provide evidence that the "bosenova" collapse does not occur in most of the astrophysical parameter space. Compared to gravitational superradiance, we find that gravitational wave "annihilation" signals and black hole spin-down are parametrically suppressed with increasing interactions, while new gravitational wave "transition" signals can take place for moderate interactions. The novel phenomenon of scalar wave emission is less suppressed at large couplings, and if the particle has Standard Model interactions, then coherent, monochromatic axion wave signals from black hole superradiance may be detectable in proposed axion dark matter experiments.
description: 60 pages, 30 figures; v2: figures and comments added to Sec. VIII. Minor changes to Sec. VII
The impact of mentoring on the behavior boys in an urban charter school
Creators: name: Harris, Katherine E.
Publisher: name: Maryland Shared Open Access Repository
Year: 2010
Subjects: subject: Schoolboys -- Research
subject: Child psychology -- Research
subject: School children -- Research
subject: Education -- Research papers (Graduate)

description: The purpose of this study was to investigate the effects of mentoring on the behavior of boys in an urban charter school. The intervention group consisted of 32 boys and the comparison group consisted of 29 boys. The types of mentoring included therapeutic mentoring, sports group mentoring with a character education component, and peer mentoring. The analysis using an independent t-test revealed that mentoring did not positively impact the behavior of boys as a whole group. The findings of the study reject the null hypothesis that mentoring will have no impact on the behavior of boys. The results of this study suggest the need for further research regarding the behavior of pre-adolescent boys.
Structures, Electronic Properties, Spectroscopies and Hexagonal Monolayer Phase of a Family of Unconventional Fullerenes C64X4 (X = H; F;Cl;Br)
Creators: name: Yan, Qing-Bo
name: Zheng, Qing-Rong
name: Su, Gang
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A systematic first-principles study within density functional theory on the geometrical structures and electronic properties of unconventional fullerene C64 and its derivatives C64X4 (X = H; F;Cl;Br) has been performed. By searching through all 3465 isomers of C64, the ground state of C64 is found to be spherical shape with D2 symmetry, which differs from the parent cage of the recently synthesized C64H4 that is pear-shaped with C3v symmetry. We found that the addition of the halogen atoms like F;Cl;Br to the pentagon-pentagon fusion vertex of C64 cage could enhance the stability, forming the unconventional fullerenes C64X4. The Mulliken charge populations, LUMO-HOMO gap energies and density of states are calculated, showing that different halogen atoms added to C64 will cause remarkably different charge populations of the C64X4 molecule; the chemical deriving could enlarge the energy gaps and affect the electronic structures distinctly. It is unveiled that C64F4 is even more stable than C64H4, as the C-X bond energy of the former is higher than that of the latter. The computed spectra of C64H4 molecules agree well with the experimental data; the IR, Raman, NMR spectra of C64X4 (X = F;Cl;Br) are also calculated to stimulate further experimental investigations. Finally, it is uncovered by total energy calculations that C64X4 could form a stable hexagonal monolayer.
description: 17 pages, 6 figures
User’s Manual for Dynamic Programming for Highway Safety Improvement Program
Creators: name: Mayes, Jesse G.
name: Crabtree, Joseph D.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1983
Subjects: subject: Transportation Engineering

description: The term, dynamic programming, was first used by Bellman to represent the mathematical theory of a multistage decision process. Dynamic programming is applied to allocate expenditures so that maximum benefits result. Three types of applications of dynamic programming are single-stage, multistage, and multistage with a time factor. Single-stage programming is used to evaluate a single project having several alternatives. Multistage programming involves selection of several projects having several alternatives. Multistage dynamic programming with a time factor is used where several projects and alternatives are considered and where various time periods are involved.  The Alabama Highway Department did considerable work on the application of dynamic programming to the optimization of budget allocation for the spot-safety- improvement program. Significant modifications were incorporated into the Alabama procedures to make it applicable to the spot-safety-improvement program in Kentucky (3). That procedure was adapted to Kentucky's needs and has been used periodically to select projects for the safety improvement program.  Another application of dynamic programming in Kentucky has been for the selection of projects for resurfacing. With hundreds of candidate projects recommended for resurfacing each year, it is difficult to select projects that will yield the greatest benefits to the driving public. Prior to the application of dynamic programming to resurfacing projects, it was necessary to develop reliable means of calculating benefits derived from roadway resurfacing.  Further use of the dynamic programming process in Kentucky has been for the development of a means to priority rank safety improvements for interstate and toll road facilities. Separate reports were prepared to document the procedures used for the interstate system and the toll road system. As was the case with other applications of dynamic programming, the major task was determination of benefits expected from each improvement. For both the interstate and toll road programs, all benefits were estimated to be the result of accident reductions associated with the improvements.  The program described herein is designed specifically for highway projects. Program development was done in 1974 and several modifications have been made since then. Additional modifications were performed during the preparation of this user's manual to make the program easier to use. A current listing of the program is in Appendix A.
Transients science with UVES
Creators: name: De Cia, Annalisa
Publisher: name: Zenodo
Year: 2021

description: The study of astronomical transients can offer the unique opportunity to obtain new insights into the nature of the transients themselves, their environments, or their lines of sight. We highlight the role in this field of UVES, which first-light image was the SN 1987A ring. UVES led to the discovery of ejecta-ring collision in SN 1987A, circumstellar material in a normal SNe Ia, and of Novae as sources of 7Be (7Li). UVES has been fundamental in exploiting Gamma Ray Bursts (GRBs) as cosmic probes, in particular the study of cosmic chemical evolution, detailed chemical properties of galaxies hosting the GRBs and along the lines of sight, including exotic chemistry and physics, as well as unveiling the physical distancesof the GRBs inside their host galaxies, thanks to the Rapid Response Mode of the VLT. Finally, we highlight the need for increased sensitivity, specially in the blue, while still keeping a broad wavelength coverage, to benefit from the full potentiall of transients science with UVES in the future.
title: Alcohol Impact Evaluation
title: (Interim Report)
titleType: Subtitle
Creators: name: Pigman, Jerry G.
name: Agent, Kenneth R.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1983
Subjects: subject: Transportation Engineering

description: This report is an evaluation of increased police enforcement to reduce alcohol related accidents in Lexington-Fayette County, Kentucky. Three types of information were collected for the analysis; accident data, arrest and adjudication data, and personal opinion data obtained by means of a questionnaire survey. Accident data were collected for two years before the Traffic Alcohol Program (TAP) and one year during the program. A 25 percent sample of arrest and adjudication data was collected one year before and one year during TAP. The questionnaire was sent to 2,500 registered vehicle owners.  Results from before-and-after comparisons and time-series analysis show alchol related accidents decreased significantly as a result of TAP. The number of DUI arrests increased from 929 in the year before to 4,427 during the first year of TAP. The program was found to be cost effective with a benefit-cost ratio over two. More than half of the respondents indicated that TAP increased their danger of DUI arrest.
Energy Non-Conservation in Quantum Mechanics
Creators: name: Carroll, Sean M.
name: Lodman, Jackie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the conservation of energy, or lack thereof, when measurements are performed in quantum mechanics. The expectation value of the Hamiltonian of a system can clearly change when wave functions collapse in accordance with the standard textbook (Copenhagen) treatment of quantum measurement, but one might imagine that the change in energy is compensated by the measuring apparatus or environment. We show that this is not true; the change in the energy of a state after measurement can be arbitrarily large, independent of the physical measurement process. In Everettian quantum theory, while the expectation value of the Hamiltonian is conserved for the wave function of the universe (including all the branches), it is not constant within individual worlds. It should therefore be possible to experimentally measure violations of conservation of energy, and we suggest an experimental protocol for doing so.
description: 11 pages
Survey of Guardrail End Treatment Usage
Creators: name: Pigman, Jerry G.
name: Agent, Kenneth R.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1983
Subjects: subject: Transportation Engineering

description: Whenever a guardrail terminates within the "clear zone," a crashworthy end treatment is required. To be crashworthy, the end-treatment should not spear, vault, or roll a vehicle during a head-on impact while maintaining vehicle decelerations below recommended limits. As a means of determining types of end treatments currently used in various states and criteria to determine what type to use, a survey letter was sent to each state.  It was found that, generally, the preferred method to use to end roadside steel beam guardrail is to bury the end in a cut slope. When this is not feasible, either a Breakaway Cable Terminal (BCT) or turned-down end treatment is generally used. While the BCT is used mos t often, some states use both, while others use only the turned-down end. There is considerable uniformity in the design of the BCT while there is a substantial diversity in the design of turned-down end treatments.  Recommendations were made concerning the type of end treatments which should be used in Kentucky for roadside steel beam guardrail. A design for a turneddown end treatment was proposed.
Focusing conditions for extended teleparallel gravity theories
Creators: name: Vinckers, U. K. Beckering
name: de la Cruz-Dombriz, A.
name: Torralba, F. J. Maldonado
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the context of extended theories of teleparallel gravity $f(T)$ we derive the focusing conditions for a one-parameter dependent congruence of timelike auto-parallels of the Levi-Civita connection. We also consider the $f(T)$ field equations for a general metric tensor before moving on to consider a spatially flat Robertson-Walker space-time. Following this, we study the expansion rate for a one-parameter dependent congruence of timelike auto-parallel curves of the Levi-Civita connection. Given the fact that test particles follow auto-parallels of the Levi-Civita connection, the torsion-free Raychaudhuri equation is used in order to determine the desired focusing conditions. Finally we study the obtained focusing conditions for three $f(T)$ paradigmatic cosmological models and discuss the satisfaction or violation of these conditions. Through this, we find $f(T)$ models that allow for the weak and strong focusing conditions to be satisfied or violated. It is mentioned that this behaviour can also be found in the so-called $f(R)$ and $f(Q)$ theories.
description: 31 pages, 9 figures, JCAP format, minor changes, matches published version in JCAP
FastCAT: Fast Cone Beam CT (CBCT) Simulation
Creators: name: O'Connell, Jericho
name: Bazalova-Carter, Magdalena
Publisher: name: arXiv
Year: 2020
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences
subject: I.6.4; I.6.6; I.6.5

description: The fastCAT application uses pre-calculated Monte Carlo (MC) CBCT phantom-specific scatter and detector response functions to reduce simulation time for megavoltage (MV) and kilovoltage (kV) CBCT imaging. Pre-calculated x-ray beam energy spectra, detector optical spread functions and energy deposition, and phantom scatter kernels are combined with GPU raytracing to produce CBCT volumes. MV x-ray beam spectra are simulated with EGSnrc for 2.5 and 6 MeV electron beams incident on a variety of target materials and kV x-ray beam spectra are calculated analytically for an x-ray tube with a tungsten anode. Detectors were modelled in Geant4 extended by Topas and included optical transport in the scintillators. Two MV detectors were modelled, a standard Varian AS1200 GOS detector and a novel CWO high detective quantum efficiency detector. A kV CsI detector was also modelled. Energy dependent scatter kernels were created in Topas for two 16-cm diameter phantoms: A Catphan 515 contrast phantom and an anthropomorphic head phantom. The Catphan phantom contained inserts of 1-5 mm in diameter of six different tissue types. FastCAT simulations retain high fidelity to measurements and MC simulations: MTF curves were within 3.5% and 1.2% of measured values for the CWO and GOS detectors, respectively. HU values and CNR in a fastCAT Catphan 515 simulation were seen to be within 95 % confidence intervals of an equivalent MC simulation for all of the tissues with root mean squared errors less than 16 HU and 1.6 in HU values and CNR comparisons, respectively. A fastCAT simulation of the Catphan 515 module with an image size of 1024x1024x10 voxels took 61 seconds on a GPU while the equivalent Topas MC was estimated to take more than 0.3 CPU years. The fastCAT application can be found at https://github.com/jerichooconnell/fastCATs.git.
description: 22 pages
A retrospective study of the impact of an international exchange program: an evaluation of changing attitudes toward internationalisation and global awareness
Creators: name: Nakai, Makiko
Publisher: name: University of British Columbia
Year: 2009

description: I explored the impact of the UBC-Ritsumeikan Academic Exchange Program in which 100 Japanese university students attend a Canadian university for 8 months. It is a sheltered immersion program during which the students come to Vancouver to study and live in an integrated academic and sheltered social environment. The research questions addressed in this study were: 1) How do the students think they learned English and what do they do to maintain it in Japan? 2) What do the students think they learned and became during the sojourn? 3) How do the students think these changes have affected their lives in Japan after the sojourn? 4) What do the students think about the program and how do the students think the program can be improved? Primary data sources included my autobiography about my international Ritsumeikan exchange experiences as well as extensive interviews of students. My findings were that the students believed they had become more international, independent, flexible, open-minded, and multicultural. The students learned Canadian culture as well as English, the relativity of culture, and humanity. The interviews found that what students learn in this exchange program is so profound that the study can encourage more people to participate in such programs. Travelling abroad to live and study itself is very stressful. Only one academic year is too short for the students to become acculturated to the new environment. The students have to return to their home countries just as they are getting used to their new environment. By identifying what kinds of stress the students encounter, the programs can be improved to help reduce it, the study can help students learn better and make the most of the programs as well. I also scrutinised how educators can facilitate such programs in the traditional classrooms using the example of a new university called Asia Pacific University (APU). Furthermore, by exploring how the students deal with the re-entry process in Japan, we can understand the students' newly constructed identity and international perspectives which are important in this shrinking global village.
Equation of state for Universe from similarity symmetries
Creators: name: Szydlowski, Marek
name: Godlowski, Wlodzimierz
name: Wojtak, Radoslaw
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we proposed to use the group of analysis of symmetries of the dynamical system to describe the evolution of the Universe. This methods is used in searching for the unknown equation of state. It is shown that group of symmetries enforce the form of the equation of state for noninteracting scaling multifluids. We showed that symmetries give rise the equation of state in the form $p=-Λ+w_{1}ρ(a)+w_{2}a^β+0$ and energy density $ρ=Λ+ρ_{01}a^{-3(1+w)}+ρ_{02}a^β+ρ_{03}a^{-3}$, which is commonly used in cosmology. The FRW model filled with scaling fluid (called homological) is confronted with the observations of distant type Ia supernovae. We found the class of model parameters admissible by the statistical analysis of SNIa data. We showed that the model with scaling fluid fits well to supernovae data. We found that $Ω_{\text{m},0} \simeq 0.4$ and $n \simeq -1$ ($β= -3n$), which can correspond to (hyper) phantom fluid, and to a high density universe. However if we assume prior that $Ω_{\text{m},0}=0.3$ then the favoured model is close to concordance $Λ$CDM model. Our results predict that in the considered model with scaling fluids distant type Ia supernovae should be brighter than in $Λ$CDM model, while intermediate distant SNIa should be fainter than in $Λ$CDM model. We also investigate whether the model with scaling fluid is actually preferred by data over $Λ$CDM model. As a result we find from the Akaike model selection criterion prefers the model with noninteracting scaling fluid.
description: accepted for publication version
Nyssen, Wilhelm, Schulz, Hans-Joachim, Wiertz, Paul: Handbuch der Ostkirchenkunde, Band I
Creators: name: Felmy, Karl Christian
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 34 Nr. 3 (1985): Ökumenische Rundschau, Band 34, Heft 3
The Tunka Experiment: Towards a 1-km^2 EAS Cherenkov Light Array in the Tunka Valley
Creators: name: Budnev, N. M.
name: Chernov, D. V.
name: Gress, O. A.
name: Kalmykov, N. N.
name: Kozhin, V. A.
name: Korosteleva, E. E.
name: Kuzmichev, L. A.
name: Lubsandorzhiev, B. K.
name: Navarra, G.
name: Panasyuk, M. I.
name: Pankov, L. V.
name: Parfenov, Yu. V.
name: Prosin, V. V.
name: Ptuskin, V. S.
name: Semeney, Yu. A.
name: Shirokov, A. V.
name: Skurikhin, A. V.
name: Spiering, C.
name: Wischnewski, R.
name: Yashin, I. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The project of an EAS Cherenkov array in the Tunka valley/Siberia with an area of about 1 km2 is presented. The new array will have a ten times bigger area than the existing Tunka-25 array and will permit a detailed study of the cosmic ray energy spectrum and the mass composition in the energy range from 10^15 to 10^18 eV.
description: 4 pages, 2 figures, ICRC2005, rus-kuzmichev-LA-abs1-he15-poster
Hydrodynamics of spin currents
Creators: name: Gallegos, Domingo
name: Gursoy, Umut
name: Yarom, Amos
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study relativistic hydrodynamics in the presence of a non vanishing spin chemical potential. Using a variety of techniques we carry out an exhaustive analysis, and identify the constitutive relations for the stress tensor and spin current in such a setup, allowing us to write the hydrodynamic equations of motion to second order in derivatives. We then solve the equations of motion in a perturbative setup and find surprisingly good agreement with measurements of global $Λ$-hyperon polarization carried out at RHIC.
description: 8 pages, 1 figure; v3: references added, typos corrected
On the Complexity of the Single Individual SNP Haplotyping Problem
Creators: name: Cilibrasi, Rudi
name: van Iersel, Leo
name: Kelk, Steven
name: Tromp, John
Publisher: name: arXiv
Year: 2005
Subjects: subject: Genomics (q-bio.GN)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: We present several new results pertaining to haplotyping. These results concern the combinatorial problem of reconstructing haplotypes from incomplete and/or imperfectly sequenced haplotype fragments. We consider the complexity of the problems Minimum Error Correction (MEC) and Longest Haplotype Reconstruction (LHR) for different restrictions on the input data. Specifically, we look at the gapless case, where every row of the input corresponds to a gapless haplotype-fragment, and the 1-gap case, where at most one gap per fragment is allowed. We prove that MEC is APX-hard in the 1-gap case and still NP-hard in the gapless case. In addition, we question earlier claims that MEC is NP-hard even when the input matrix is restricted to being completely binary. Concerning LHR, we show that this problem is NP-hard and APX-hard in the 1-gap case (and thus also in the general case), but is polynomial time solvable in the gapless case.
description: 26 pages. Related to the WABI2005 paper, "On the Complexity of Several Haplotyping Problems", but with more/different results. This papers has just been submitted to the IEEE/ACM Transactions on Computational Biology and Bioinformatics and we are awaiting a decision on acceptance. It differs from the mid-August version of this paper because here we prove that 1-gap LHR is APX-hard. (In the earlier version of the paper we could prove only that it was NP-hard.)
The interplay of common noise and finite pulses on biological neurons
Creators: name: Afifurrahman
name: Mohd, Mohd Hafiz
name: Abdullah, Farah Aini
Publisher: name: arXiv
Year: 2024
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: The response of neurons is highly sensitive to the stimulus. The stimulus can be associated with a direct injection in vitro experimentation (e.g., time dependent and independent inputs); or post-synaptic potentials resulting from the interaction of many neurons. A typical incoming stimulus resembles a noise which in principle can be described as a random variable. In computational neuroscience, the noise has been extensively studied for different setups. In this study, we investigate the effect of noisy inputs in a minimal network of two identical leaky integrate-and-fire (LIF) neurons interacting with finite pulses. In particular, we consider a Gaussian white noise as a standard function for stochastic modelling of neurons, while taking into account the pulse width as an elementary component for the signal transmission. By exploring the role of noise and finite pulses, the two neurons show a synchronous spiking behaviour characterized by fluctuations in the interspike intervals. Above some critical values the synchronous regime collapses onto asynchronous dynamics. The abrupt change in such dynamics is accompanied by a hysteresis, i.e., the coexistence of synchronous and asynchronous firing behaviour.
description: 11 pages, 8 figures
Light neutralinos at LHC in cosmologically-inspired scenarios: new benchmarks in the search for supersymmetry
Creators: name: Bottino, A.
name: Fornengo, N.
name: Polesello, G.
name: Scopel, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study how the properties of the four neutralino states, chi_i (i = 1, 2, 3, 4), can be investigated at the Large Hadron Collider (LHC), in the case when the lightest one, chi_1, has a mass m_chi < 50 GeV and is stable. This situation arises naturally in supersymmetric models where gaugino masses are not unified at a Grand Unified (GUT) scale and R-parity is conserved. The main features of these neutralino states are established by analytical and numerical analyses, and two scenarios are singled out on the basis of the cosmological properties required for the relic neutralinos. Signals expected at LHC are discussed through the main chain processes started by a squark, produced in the initial proton-proton scattering. We motivate the selection of some convenient benchmarks, in the light of the spectroscopical properties (mass spectrum and transitions) of the four neutralino states. Branching ratios and the expected total number of events are derived in the various benchmarks, and their relevance for experimental determination of neutralino properties is finally discussed.
description: 21 pages, 17 figures
แบบจำลองพื้นที่การใช้ประโยชน์ร่วมกันของกระทิงและช้างป่า ในเขตรักษาพันธุ์สัตว์ป่าภูเขียว จังหวัดชัยภูมิ
Creators: name: คชกริช ผลานิสงค์
Publisher: name: Thammasat University
Year: 2019
Subjects: wildlife
distribution
Phu Khieo Wildlife Sanctuary

description: Thai Journal of Science and Technology, 8, 2, 116-126
Decoherence Effects in Reactive Scattering
Creators: name: Han, Heekyung
name: Brumer, Paul
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Decoherence effects on quantum and classical dynamics in reactive scattering are examined using a Caldeira-Leggett type model. Through a study of dynamics of the collinear H+H2 reaction and the transmission over simple one-dimensional barrier potentials, we show that decoherence leads to improved agreement between quantum and classical reaction and transmission probabilities, primarily by increasing the energy dispersion in a well defined way. Increased potential nonlinearity is seen to require larger decoherence in order to attain comparable quantum-classical agreement.
description: 25 pages, 6 figures, to be published in J. Chem. Phys
Cellular Automata with Symmetric Local Rules
Creators: name: Kornyak, Vladimir V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: FOS: Physical sciences

description: The cellular automata with local permutation invariance are considered. We show that in the two-state case the set of such automata coincides with the generalized Game of Life family. We count the number of equivalence classes of the rules under consideration with respect to permutations of states. This reduced number of rules can be efficiently generated in many practical cases by our C program. Since a cellular automaton is a combination of a local rule and a lattice, we consider also maximally symmetric two-dimensional lattices. In addition, we present the results of compatibility analysis of several rules from the Life family.
description: 11 pages, corrected to match published version
Magnetic properties and phase diagrams of mixed spin-1 and spin-1/2 Ising model on a checkerboard square structure: A Monte Carlo study
Creators: name: Gharaibeh, Maen
name: Badarneh, Mohammad H. A.
name: Alqaiem, Samah
name: Obeidat, Abdalla
name: Qaseer, Mohammad-Khair
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The magnetic properties and phase diagrams of the mixed spin-1 and spin-1/2 Ising model on a checkerboard square structure have been studied using the Monte Carlo simulations based on the Metropolis update protocol. The system consists of four quartets of alternative spin configuration. The effect of the exchange interactions J and crystal field D on the magnetic properties, critical and compensation temperatures, susceptibility, and specific heat of the system have been investigated. The phase diagrams, T-J and T-D, for different values of the exchange interactions and crystal field have been examined. We found that the compensation temperature starts to evolve for J1 < 0.6 of the spin-1 assembly and for J2 > 1.6 for spin-1/2. On the other hand, the effect of ferrimagnetic coupling does not show any threshold value; in this case, the compensation temperature is constant. Regarding the crystal field strength, the threshold value of D > -0.8 has been observed. We obtain the N-, Q- and P-type compensation behaviors in the system. We have observed that the phase diagrams exhibit only a second-order phase transition to a paramagnetic phase; hence, the system does not show the tricritical point. The magnetic hysteresis cycles of the mixed spin-1 and spin-1/2 on a checkerboard square structure for different values of the exchange interactions, temperatures, and crystal fields have been found. Finally, the system exhibits the superparamagnetism behavior for a fixed value of the temperature and crystal field.
description: 21 pages, 12 figures
A property (T) for C*-algebras
Creators: name: Bekka, Bachir
Publisher: name: arXiv
Year: 2005
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46L05; 22D10

description: We define a notion of Property (T) for an arbitrary $C^*$-algebra $A$ admitting a tracial state. We extend this to a notion of Property (T) for the pair $(A,B),$ where $B$ is a $C^*$-subalgebra of $A.$ Let $Γ$ be a discrete group and $C^*_r(Γ)$ its reduced algebra. We show that $C^*_r(Γ)$ has Property (T) if and only if the group $Γ$ has Property (T) . More generally, given a subgroup $Λ$ of $Γ$, the pair $(C^*_r(Γ),C^*_r(Λ))$ has Property (T) if and only if the pair of groups $(Γ, Λ)$ has Property (T).
description: 14 pages
Multi-$\bar{K}$ nuclei and kaon condensation
Creators: name: Gazda, D.
name: Friedman, E.
name: Gal, A.
name: Mareš, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We extend previous relativistic mean-field (RMF) calculations of multi-$\bar K$ nuclei, using vector boson fields with SU(3) PPV coupling constants and scalar boson fields constrained phenomenologically. For a given core nucleus, the resulting $\bar K$ separation energy $B_{\bar K}$, as well as the associated nuclear and $\bar K$-meson densities, saturate with the number $κ$ of $\bar K$ mesons for $κ> κ_{\rm sat} \sim 10$. Saturation appears robust against a wide range of variations, including the RMF nuclear model used and the type of boson fields mediating the strong interactions. Because $B_{\bar K}$ generally does not exceed 200 MeV, it is argued that multi-$\bar K$ nuclei do not compete with multihyperonic nuclei in providing the ground state of strange hadronic configurations and that kaon condensation is unlikely to occur in strong-interaction self-bound strange hadronic matter. Last, we explore possibly self-bound strange systems made of neutrons and ${\bar K}^0$ mesons, or protons and $K^-$ mesons, and study their properties.
description: 21 pages, 8 figures, revised text and references
Differentiation of mouse embryonic stem cells into extra-embryonic endoderm stem cells
Creators: name: Ciliberti, G.
name: Ritter, S.
name: Durante, M.
name: Schroeder, I.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Fair Classification with Group-Dependent Label Noise
Creators: name: Wang, Jialu
name: Liu, Yang
name: Levy, Caleb
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: This work examines how to train fair classifiers in settings where training labels are corrupted with random noise, and where the error rates of corruption depend both on the label class and on the membership function for a protected subgroup. Heterogeneous label noise models systematic biases towards particular groups when generating annotations. We begin by presenting analytical results which show that naively imposing parity constraints on demographic disparity measures, without accounting for heterogeneous and group-dependent error rates, can decrease both the accuracy and the fairness of the resulting classifier. Our experiments demonstrate these issues arise in practice as well. We address these problems by performing empirical risk minimization with carefully defined surrogate loss functions and surrogate constraints that help avoid the pitfalls introduced by heterogeneous label noise. We provide both theoretical and empirical justifications for the efficacy of our methods. We view our results as an important example of how imposing fairness on biased data sets without proper care can do at least as much harm as it does good.
description: 11 pages, 9 tables
Felmy, Karl Christian: Die Deutung der göttlichen Liturgie in der russischen Theologie
Creators: name: Krüger, Hanfried
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 34 Nr. 3 (1985): Ökumenische Rundschau, Band 34, Heft 3
The all-clear incarnate? : Helmut Kohl's nationalism and the quest for normality
Creators: name: Wicke, Christian
Publisher: name: The Australian National University
Year: 2011
Subjects: subject: JC311.W53 2011
subject: Kohl, Helmut, 1930-
subject: Nationalism
subject: Nationalism Religious aspects
subject: Germany History 1990-
subject: Germany Politics and government 1945-1990

description: Nations exist because individuals believe in their existence; the foundations of such beliefs can be explored through the study of individual lives. This political biography is concerned with the personal nationalism of Helmut Kohl. The so-called Chancellor of Unity was instrumental in Germany's (re)unification process in 1989/90, which was a prime example of a nationalist event. However, Kohl's nationalism went beyond the one nation = one state formula. Nationalism is treated here as a contemporary, mainstream phenomenon with the capacity to generate countless personal notions of nations. Biography helps to understand the particular repertoire of self-images that the nationalist can mobilise selectively to represent his ideal notion of the nation and himself. In Kohl's case, it was not only his membership of a political party (CDU), but also the combination of religious (Roman Catholic), generational (forty-fiver), regional (Palatinate), and educational (PhD in History) affiliations that were formative to his nationalist representation in the context of the Cold War and the memory of Germany's Nazi past. Kohl's personal nationalism can be analysed along four ideological traditions in German nationalism. The four empirical chapters - which discuss Kohl in that order as Catholic Nationalist, Liberal Nationalist, Romantic Nationalist and Nationalist Historian - each connect Kohl's nationalist ideas to particular biographical narratives that shaped Kohl's self-perception and provided his representation of the German nation with an appearance of authenticity. Kohl used his (auto)biography to promote a normalisation of German nationalism during his quest to overcome the Sonderweg stigma. Together these four pillars sustained Kohl's representation as the embodiment of the 'all-clear': a de-radicalised German nationalism, which was intended to eclipse its anti-Western and post-national peculiarities.
Examining student conceptualisations of and attitude toward the reading process and reading assessment
Creators: name: Cooper, Kenneth Charles
Publisher: name: University of British Columbia
Year: 2009

description: In this study the researcher provides descriptive analysis of a number of research questions looking at children's conceptualisations of and attitude toward reading and reading assessment. The researcher used six different reading assessment instruments covering a range from authentic through informal to standardised testing. Through descriptive, non-statisticatiy significant analysis of the data generated primarily from 96 student interviews about the assessment sessions and 9 teacher interviews conducted with 12 students and 3 teachers, and the supporting data from a selection of surveys and questionnaires, the researcher looked at students' conceptualisations of and attitude toward the reading process and reading assessment, student metacognitive control of assessment processes, and teacher preferences in reading assessment. The researcher also speculated about the influence of six instructional, familial, and personal factors (instructional background, socio-economic background, level of reading development, gender, ESL/non-ESL background, and reading model held) on these conceptualisations and attitudes. Although there was ample evidence to show that grade 4 students had conceptualisations of and attitudes to reading and reading assessment and were able to articulate these, the influence of the six study factors could only be speculated upon. This speculation led to a number of recommendations for further research.
Radio frequency mixing modules for superconducting qubit room temperature control systems
Creators: name: Xu, Yilun
name: Huang, Gang
name: Santiago, David I.
name: Siddiqi, Irfan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: As the number of qubits in nascent quantum processing units increases, the connectorized RF (radio frequency) analog circuits used in first generation experiments become exceedingly complex. The physical size, cost and electrical failure rate all become limiting factors in the extensibility of control systems. We have developed a series of compact RF mixing boards to address this challenge by integrating I/Q quadrature mixing, IF(intermediate frequency)/LO(local oscillator)/RF power level adjustments, and DC (direct current) bias fine tuning on a 40 mm $\times $ 80 mm 4-layer PCB (printed circuit board) board with EMI (electromagnetic interference) shielding. The RF mixing module is designed to work with RF and LO frequencies between 2.5 and 8.5 GHz. The typical image rejection and adjacent channel isolation are measured to be $\sim$27 dBc and $\sim$50 dB. By scanning the drive phase in a loopback test, the module short-term amplitude and phase linearity are typically measured to be 5$\times$10$^{-4}$ (V$_{\mathrm{pp}}$/V$_{\mathrm{mean}}$) and 1$\times$10$^{-3}$ radian (pk-pk). The operation of RF mixing board was validated by integrating it into the room temperature control system of a superconducting quantum processor and executing randomized benchmarking characterization of single and two qubit gates. We measured a single-qubit process infidelity of $9.3(3) \times 10^{-4}$ and a two-qubit process infidelity of $2.7(1) \times 10^{-2}$.
description: Updated the title. Added the git repository of RF mixing modules design. Added the explanation for SRB. Added funding agency
Ensemble Defense System: A Hybrid IDS Approach for Effective Cyber Threat Detection
Creators: name: Alharbi, Sarah
name: Khan, Arshiya
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Sophisticated cyber attacks present significant challenges for organizations in detecting and preventing such threats. To address this critical need for advanced defense mechanisms, we propose an Ensemble Defense System (EDS). An EDS is a cybersecurity framework aggregating multiple security tools designed to monitor and alert an organization during cyber attacks. The proposed EDS leverages a comprehensive range of Intrusion Detection System (IDS) capabilities by introducing a hybrid of signature-based IDS and anomaly-based IDS tools. It also incorporates Elasticsearch, an open-source Security Information and Event Management (SIEM) tool, to facilitate data analysis and interactive visualization of alerts generated from IDSs. The effectiveness of the EDS is evaluated through a payload from a bash script that executes various attacks, including port scanning, privilege escalation, and Denial-of-Service (DoS). The evaluation demonstrates the EDS's ability to detect diverse cyber attacks.
Consistent discretizations: the Gowdy spacetimes
Creators: name: Gambini, Rodolfo
name: Ponce, Marcelo
name: Pullin, Jorge
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We apply the consistent discretization scheme to general relativity particularized to the Gowdy space-times. This is the first time the framework has been applied in detail in a non-linear generally-covariant gravitational situation with local degrees of freedom. We show that the scheme can be correctly used to numerically evolve the space-times. We show that the resulting numerical schemes are convergent and preserve approximately the constraints as expected.
description: 10 pages, 8 figures
Theory and investigation of acoustic multiple-input multiple-output systems based on spherical arrays in a room
Creators: name: Morgenstern, Hai
name: Rafaely, Boaz
name: Zotter, Franz
Publisher: name: arXiv
Year: 2024
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Spatial attributes of room acoustics have been widely studied using microphone and loudspeaker arrays. However, systems that combine both arrays, referred to as multiple-input multiple-output (MIMO) systems, have only been studied to a limited degree in this context. These systems can potentially provide a powerful tool for room acoustics analysis due to the ability to simultaneously control both arrays. This paper offers a theoretical framework for the spatial analysis of enclosed sound fields using a MIMO system comprising spherical loudspeaker and microphone arrays. A system transfer function is formulated in matrix form for free-field conditions, and its properties are studied using tools from linear algebra. The system is shown to have unit-rank, regardless of the array types, and its singular vectors are related to the directions of arrival and radiation at the microphone and loudspeaker arrays, respectively. The formulation is then generalized to apply to rooms, using an image source method. In this case, the rank of the system is related to the number of significant reflections. The paper ends with simulation studies, which support the developed theory, and with an extensive reflection analysis of a room impulse response, using the platform of a MIMO system.