cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Geometrical approach to SU(2) navigation with Fibonacci anyons
Creators: name: Mosseri, Remy
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Geometric Topology (math.GT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Topological quantum computation with Fibonacci anyons relies on the possibility of efficiently generating unitary transformations upon pseudoparticles braiding. The crucial fact that such set of braids has a dense image in the unitary operations space is well known; in addition, the Solovay-Kitaev algorithm allows to approach a given unitary operation to any desired accuracy. In this paper, the latter task is fulfilled with an alternative method, in the SU(2) case, based on a generalization of the geodesic dome construction to higher dimension.
description: 12 pages, 5 figures
title: Macroscopic aspects of ferromagnetic nematic phases, tetrahedral order in ferrogels, and magnetorheological fluids
Creators: name: Potisk, Tilen
Publisher: name: University of Bayreuth
Year: 2019
Subjects: subject: Macroscopic dynamics
subject: ferromagnetic nematic liquid crystals
subject: tetrahedral order
subject: magnetorheological fluids
subject: 530

description: This thesis deals with the construction of macroscopic models for several magnetic macroscopic phases. The results are applied to the available experimental data or simple experimental suggestions are made for detecting static or dynamic aspects of each phase. The considered magnetic systems are ferromagnetic nematic liquid crystals, tetrahedral ferromagnetic gels and magnetorheological fluids. A common feature in the description of these systems is the inclusion of an independent dynamic equation for the magnetization. This is a variable that changes sign under time reversal. Such behavior introduces profound consequences on the static as well as dynamic phenomena, which are not possible in nonmagnetic systems. The approach used in this thesis is macroscopic dynamics which is based on linear irreversible thermodynamics. The equations are nevertheless highly nonlinear as the transport tensors are generally dependent on the variables. Macroscopic dynamics provides a systematic description valid on length and time scales much larger than the ones characteristic for microscopic degrees of freedom. It can be applied to many different systems and to different geometries.
Effective temperature of self--similar time series: analytical and numerical developments
Creators: name: Olemskoi, Alexander
name: Kokhan, Sergei
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Within both slightly non--extensive statistics and related numerical model, a picture is elaborated to treat self--similar time series as a thermodynamic system. Thermodynamic--type characteristics relevant to temperature, pressure, entropy, internal and free energies are introduced and tested. Predictability conditions of time series analysis are discussed on the basis of Van der Waals model. Maximal magnitude for time interval and minimal resolution scale of the value under consideration are found and analyzed in details. The statistics developed is shown to be governed by effective temperature being exponential measure of the fractal dimension of the time series. Testing of the analytical consideration is based on numerical scheme of non--extensive random walk. A statistical scheme is introduces to present numerical model as a grand canonical ensemble for which entropy and internal energy are calculated as functions of particle number. Effective temperature is found numerically to show that its value is reduced to averaged energy per one degree of freedom.
description: 27 pages, 8 figures
Factors influencing the mechanical properties of silicate fibres
Creators: name: Wojnárovits, Ilona
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1995
Subjects: subject: 660

description: Eight fibre materials (three basalt wools, three kaolin wools, a glass wool and an SiO₂-based sample) were used to study the relationship between the tensile strength and other characterisdcs (fibre diameter, chemical composidon, structural homogeneity and order, surface porosity). Based on the porosity investigation size ranges of the macropores (ca. ≥0.15 µm), mesopores (ca. 0.15 to 0.006 µm) and micropores (ca. ≤0.006 µm) were distinguished. Considerable macroporosity was shown by the SiO₂ sample only. On the basis of the specific pore volume the amorphously structured glass wool may be considered to have a relatively defectless surface, while the surfaces of the glass-ceramic structured kaolin wool and of the SiO₂ fibres contain several potential defect points. It was shown that the porosity and the diameter of mesopores of basalt wool samples manufactured by different techniques increase with the reducdon of Fe(III), i.e. with the Fe(II)/(Fe(II)+Fe(III)) rado. There is no direct connection between the chemical composition of inorganic fibrous materials and their mechanical properties. For instance, the tensile strength of of d ≤ 12 µm diameter basalt and glass wool samples produced in tank furnaces is similar, in the case of thicker fibres (d ≥ 12 µm), however, the strength of the basalt fibres, due to their more inhomogeneous structure, is smaller than that of the glass fibres. While the changes in tensile strength of a given fibre material are mainly determined by the fibre diameter, those of samples of similar type and of identical diameter are first of all determined by their surface porosity. From the point of view of the mechanical properties of fibres, the possible smallest specific pore volume and within this the possible minimal extent of large-sized mesopores (ca. 0.15 to 0.03 µm) are most beneficial.
Spillway Preheating
Creators: name: Fan, JiJi
name: Lozanov, Kaloian D.
name: Lu, Qianshu
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In traditional models only an order one fraction of energy is transferred from the inflaton to radiation through nonperturbative resonance production in preheating immediately after inflation, due to backreaction effects. We propose a particle production mechanism that could improve the depletion of the inflaton energy density by up to four orders of magnitude. The improvement comes from the fast perturbative decays of resonantly produced daughter particles. They act as a "spillway" to drain these daughter particles, reducing their backreaction on the inflaton and keeping the resonant production effective for a longer period. Thus we dub the scenario "spillway preheating". We also show that the fraction of energy density remaining in the inflaton has a simple inverse power-law scaling in the scenario. In general, spillway preheating is a much more efficient energy dissipation mechanism, which may have other applications in model building for particle physics.
description: 20 pages, 8 figures. v3: minor changes and revised discussion of constraint on the parameters, as published in JHEP
D1.2 Definition of Priority DLCs and Load Characterisation Report
Creators: name: Laporte Weywada, Pauline
name: Cruz, João
name: Scriven, Joshua
Publisher: name: Zenodo
Year: 2019
Subjects: MegaRoller; Load analysis; Performance; Load metrics; Design load cases

description: This document constitutes a preliminary load analysis report for the MegaRoller wave energy converter (WEC), presenting performance and ultimate load metrics for a range of design situations. It includes the definition of a set of critical design load cases (DLCs), the description of the approach followed to conduct the load analysis effort, and the key results from the priority load calculations.
Systematic study of the $^{87}$Sr clock transition in an optical lattice
Creators: name: Ludlow, Andrew D.
name: Boyd, Martin M.
name: Zelevinsky, T.
name: Foreman, Seth M.
name: Blatt, Sebastian
name: Notcutt, Mark
name: Ido, Tetsuya
name: Ye, Jun
Publisher: name: arXiv
Year: 2005
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: With ultracold $^{87}$Sr confined in a magic wavelength optical lattice, we present the most precise study (2.8 Hz statistical uncertainty) to-date of the $^1S_0$ - $^3P_0$ optical clock transition with a detailed analysis of systematic shifts (20 Hz uncertainty) in the absolute frequency measurement of 429 228 004 229 867 Hz. The high resolution permits an investigation of the optical lattice motional sideband structure. The local oscillator for this optical atomic clock is a stable diode laser with its Hz-level linewidth characterized across the optical spectrum using a femtosecond frequency comb.
description: 4 pages, 4 figures, 1 table
What Women Know: Perceptions of Seven Female Superintendents
Creators: name: Allred, Polly
name: Maxwell, Gerri
name: Skrla, Linda
Publisher: name: Advancing Women in Leadership Journal
Year: 1970

description: An anomalous concentration of female superintendents in mostly rural South Texas prompted this inquiry. South Texas faces critical shortages in personnel due to impending retirement and turnover of existing school administrators and superintendents (Wesson & Marshall, 2012). It is difficult to recruit and retain the best talent necessary to solve tough school improvement challenges""high dropout rates, high poverty, low student achievement, and complex multi-cultural issues""in high needs, Hispanic majority, primarily rural school districts (Trevino Jr., Braley, Brown, & Slate, 2008; Wesson & Marshall, 2012). Krüger (2008) stated women are stronger educational leaders than men. Females seek and obtain leadership credentials for the express purpose of impacting education for students (Young & McLeod, 2001). Schools of all sizes and levels with female administrators achieved higher student success than schools with male administrators, according to a 7000 campus Texas study, in the 2006-2007 academic year (Roser, Brown, & Kelsey, 2009). In every ethnic group, women earn more doctoral degrees in education than men; women earn bachelors and masters degrees in education in proportion to their representation in the field; and women have more years of teaching experience than men (Shakeshaft, Brown, Irby, Grogan, & Ballenger, 2007). Women also outnumber men in education administration preparation programs (Petrie & Lindauer, 2001). Yet women are not ascending to the superintendency in proportion to their representation in the education profession (Shakeshaft et al., 2007). This naturalistic study of seven female superintendents in South Texas, including leaders in large and small rural districts, illuminated perceptions and experiences of female school leadership through portraiture and lent insight into common themes of aspiration and motivation.
description: Advancing Women in Leadership Journal, Vol. 37 (2017)
The role of gases in glass melting processes
Creators: name: Beerkens, Ruud G. C.
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1995
Subjects: subject: 660

description: The formation of gases and vapors during glass melting and the interaction between furnace atmospheres and industrial glass melts have an important impact on the emissions of glass furnaces, the glass properties and the quality of the glass products. Degassing or fining of glass melts is necessary to obtain a glass without gaseous inclusions. A simulation model has been developed which describes the behavior of gas bubbles in glass melts, depending on the process conditions. This model can be used to optimize the fining process in industrial furnaces. Foam formation on top of glass melts blocks the radiation from the combustion chamber of glass furnaces into the melt. Laboratory tests are used to find practical ways to reduce foaming during melting of sulfate-containing glasses. These tests show the importance of the furnace atmosphere on foam behavior in glass meldng tanks. Volatilization is the major source of particulate emissions in most glass furnaces. Volatilization rates from glass melts can be reduced by lowering the hot-spot temperatures and local gas velocities directly above the melt. One of the most important issues for glass makers today is the NOₓ formation of fossil fuel-fired furnaces. Results from West European glass producers show the possibility to decrease the formation levels of NOₓ by delayed mixing of the fuel and the oxidant and by intelHgent combustion control. Increased levels of water vapor in the glass furnace atmosphere will give higher water concentrations in the glass melt. In water rich glass melts, the sulfate retention will be often much less than in glasses molten in dry atmospheres. The water vapor effects the viscosity, radiative properties and the redox state of the melt. Because of these effects, the color of glasses molten in oxy-fuelfired furnaces, with high water vapor concentrations, may be different from glass molten in air-fired furnaces, using the same batch composition.
African American Women in Student Affairs: Best Practices for Winning the Game
Creators: name: Henry, Dr. Wilma J.
Publisher: name: Advancing Women in Leadership Journal
Year: 2017

description: Current research regarding the experiences of African American women in higher education clusters staff, faculty, and students together, overlooking the unique contributions and challenges of each cohort. The purpose of this article is to explore the opinions and experiences of African American women in student affairs administration, in order to add to the body of knowledge regarding women in student affairs. Implications for best practices for African American women in student affairs administration are discussed, and recommendations for further research are provided.
description: Advancing Women in Leadership Journal, Vol. 30 (2010)
Application of the Christiansen-Shelyubskii method to determine homogeneity and refractive index of industrial glasses
Creators: name: Tenzler, Thomas
name: Frischat, Günther Heinz
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1995
Subjects: subject: 660

description: The Christiansen-Shelyubskii method has been applied to determine the homogeneity of both colorless and colored technical glasses. It could be confirmed that this method is sufficiently sensitive to changes by the melting process of flat, container and special glasses. The homogeneity factor, which essentially is the standard deviation of the refractive index, can be obtained with a precision of about ±5 %. The measurement simultaneously delivers the mean refractive index with high accuracy. This property possibly could be used to substitute density measurements to control the constancy of glass composition. The Christiansen-Shelyubskii method can be standardized and highly automated. About 15 samples can be measured per day. Thus it shows all features of a method to be used for industrial quality control.
The matter Lagrangian of an ideal fluid
Creators: name: Mendoza, S.
name: Silva, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that the matter Lagrangian of an ideal fluid equals (up to a sign -depending on its definition and on the chosen signature of the metric) the total energy density of the fluid, i.e. rest energy density plus internal energy density.
description: 5 pages, accepted for publication in: International Journal of Geometric Methods in Modern Physics (IJGMMP)
Wronskian Indices and Rational Conformal Field Theories
Creators: name: Das, Arpit
name: Gowdigere, Chethan N.
name: Santara, Jagannath
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The classification scheme for rational conformal field theories, given by the Mathur-Mukhi-Sen (MMS) program, identifies a rational conformal field theory by two numbers: $(n, l)$. $n$ is the number of characters of the rational conformal field theory. The characters form linearly independent solutions to a modular linear differential equation (which is also labelled by $(n, l)$); the Wronskian index $l$ is a non-negative integer associated to the structure of zeroes of the Wronskian. In this paper, we compute the $(n, l)$ values for three classes of well-known CFTs viz. the WZW CFTs, the Virasoro minimal models and the $\mathcal{N} = 1$ super-Virasoro minimal models. For the latter two, we obtain exact formulae for the Wronskian indices. For WZW CFTs, we get exact formulae for small ranks (upto 2) and all levels and for all ranks and small levels (upto 2) and for the rest we compute using a computer program. We find that any WZW CFT at level 1 has a vanishing Wronskian index as does the $\mathbf{\hat{A}_1}$ CFT at all levels. We find intriguing coincidences such as: (i) for the same level CFTs with $\mathbf{\hat{A}_2}$ and $\mathbf{\hat{G}_2}$ have the same $(n,l)$ values, (ii) for the same level CFTs with $\mathbf{\hat{B}_r}$ and $\mathbf{\hat{D}_r}$ have the same $(n,l)$ values for all $r \geq 5$. Classifying all rational conformal field theories for a given $(n, l)$ is one of the aims of the MMS program. We can use our computations to provide partial classifications. For the famous $(2, 0)$ case, our partial classification turns out to be the full classification (achieved by MMS three decades ago). For the $(3, 0)$ case, our partial classification includes two infinite series of CFTs as well as seven ``discrete'' CFTs; except two all others have Kac-Moody symmetry.
description: 48 pages, 5 tables, partial classification of (3,0) CFTs expanded to include tensor product CFTs
Glass in contact with mould materials for container production
Creators: name: Manns, Peter
name: Döll, Walter
name: Kleer, Günter
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1995
Subjects: subject: 660

description: The high-temperature behaviour of various mould materials and coatings was studied by subjecting to cychc temperature changes in oxidizing atmosphere and to contact with a soda-lime-sihca glass melt at 1050°C. In a cyclic immersion test the influence of the type of mould material, type of coating, surface roughness and of temperature on the tendency of sticking to the glass melt was investigated. In the base materials the corrosive attack mainly occurred along grain boundaries and in softer phases of the materials, starting from the surfaces. Defects in the moulded glass surfaces, worn-off particles from the moulds and microcracks due to adhesion were found to depend on the type of oxide layer formed on the mould surface. Some ceramic nitride PVD films proved highly resistant to oxidation and abrasion, and caused no detectable damage of the glass. The sticking behaviour of the glass to the various mould materials was investigated by measuring the separation forces. They were found to increase exponentially with temperature up to permanent adhesion. All of the mould materials investigated showed the same dependency of separation forces on temperature. Only in the case of a specific coating containing boron nitride a shift to distinctly higher temperatures was observed.
Spin and mass currents near a moving magnetic obstacle in a two-component Bose-Einstein condensate
Creators: name: Jung, Jong Heum
name: Kim, Hyung Jin
name: Shin, Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study the spatial distributions of the spin and mass currents generated by a moving Gaussian magnetic obstacle in a symmetric, two-component Bose-Einstein condensate in two dimensions. We analytically describe the current distributions for a slow obstacle and show that the spin and the mass currents exhibit characteristic spatial structures resembling those of electromagnetic fields around dipole moments. When the obstacle's velocity increases, we numerically observe that the flow pattern maintains its overall structure while the spin polarization induced by the obstacle is enhanced with an increased spin current. We investigate the critical velocity of the magnetic obstacle based on the local criterion of Landau energetic instability and find that it decreases almost linearly as the magnitude of the obstacle's potential increases, which can be directly tested in current experiments.
description: 8 pages, 5 figures
Female Bodies: Gender Inequalities, Vulnerability, HIV and AIDS in Kenya
Creators: name: Sesay, Dr. Waithera
Publisher: name: Advancing Women in Leadership Journal
Year: 2017

description: This paper emerged from a lack of literature on women's vulnerability to HIV/AIDS in AIDS discourses. Women have been vulnerable to HIV/AIDS since the epidemic emerged but not much research has been done specifically on Kenyan women. The ways in which women are vulnerable to HIV infection were explored by examining social, economic, and cultural identities that affect women's sexual relations using a feminist lens. In this research, it is postulated that HIV vulnerability has to be studied in the context of patriarchy and cultural constraints. To address women's vulnerability to HIV/AIDS, secondary analysis of data from the 2003 Kenya Demographic and Health Survey was utilized. Hence, demographic variables of age, education, religion, ethnicity, region of residence, marital status, and employment were the independent variables that were used to discern the factors associated with HIV vulnerability among women. A dependent variable, HIV vulnerability which I constructed from the 2003 Health and Demographic Survey was conceived of as a larger concept comprised of powerlessness in basic decision-making processes within the household, AIDS-related knowledge on transmission and prevention, cultural practices which encompassed polygamy, wife inheritance, and sexual behavior, and perceived risk of contracting the HIV/AIDS disease. In this study, the data strongly suggested that women in Kenya are more vulnerable to HIV/AIDS when they are younger, have low levels of education, are from different ethnicities and from certain regions, are unmarried, and not employed. The findings supported the literature that women's vulnerability is strongly influenced and tied by broader forces present in the society. Women's vulnerability to HIV/AIDS is real and needs to be tackled for any progress to occur in the fight against AIDS. HIV/AIDS is a very expensive disease that totally drains economies of households, communities, and countries. Until HIV vulnerability is acknowledged and fought, women will continue to succumb to the disease overwhelmingly and Kenya will eventually disintegrate as it will be full of sick people intensifying underdevelopment. Women's vulnerability to HIV/AIDS is an urgent issue that needs dire attention for Kenya to prosper. A healthy population fosters development and stability. However HIV/AIDS produces instability, suffering, extreme poverty, and underdevelopment.
description: Advancing Women in Leadership Journal, Vol. 30 (2010)
Executing dynamic heterogeneous workloads on Blue Waters with RADICAL-Pilot
Creators: name: Santcroos, Mark
name: Castain, Ralph
name: Merzky, Andre
name: Bethune, Iain
name: Shantenu Jha
Publisher: name: Zenodo
Year: 2016
Subjects: High Performance Computing
Computational Science
Concurrent Task Execution

description: Traditionally HPC systems such as Crays have been designed to support mostly monolithic workloads. However, the workload of many important scientific applications is constructed out of spatially and temporally heterogeneous tasks that are often dynamically inter-related. These workloads can benefit from being executed at scale on HPC resources, but a tension exists between the workloads' resource utilization requirements and the capabilities of the HPC system software and usage policies. Pilot systems have the potential to relieve this tension. RADICAL-Pilot is a scalable and portable pilot system that enables the execution of such diverse workloads. In this paper we describe the design and characterize the performance of its RADICAL-Pilot's scheduling and executing components on Crays, which are engineered for efficient resource utilization while maintaining the full generality of the Pilot abstraction. We will discuss four different implementations of support for RADICAL-Pilot on Cray systems and analyze and report on their performance.
Unmasking the Sociocultural Constraints to Career Growth of Married Women in Ghanaian Organizations
Creators: name: Sanda, Dr. Mohammed-Aminu
name: Sackey, Jocelyn
Publisher: name: Advancing Women in Leadership Journal
Year: 2017

description: This study investigated the question of how culture and activity can be explored towards understanding the professional career development of married women and the relative constraints associated with such development in the Ghanaian environment. Guided by the cultural-historical activity theory (CHAT) framework, data was collected from a sample of 141 married Ghanaian women professionals engaged in white collar jobs in the public and private institutions located in Accra. It is established that the acceptance by the Ghanaian traditional society of the married professional woman as a capable person who can equally perform in an organization and thus need to be trusted, supported and recognized is of relevance to her career development. This observation provides learning on the impact of the inflow of socio-cultural dynamics into a gender-oriented organizational life and the complexities that it generates in understanding the constraints to the professional career development of married women.
description: Advancing Women in Leadership Journal, Vol. 30 (2010)
Ökumenischer Rat der Kirchen: Bewahrung der Schöpfung
Creators: name: Hilberath, Bernd Jochen
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 38 Nr. 1 (1989): Ökumenische Rundschau, Band 38, Heft 1
Scaling in the crossover from random to correlated growth
Creators: name: Reis, Fabio D. A. Aarao
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In systems where deposition rates are high compared to diffusion, desorption and other mechanisms that generate correlations, a crossover from random to correlated growth of surface roughness is expected at a characteristic time t_0. This crossover is analyzed in lattice models via scaling arguments, with support from simulation results presented here and in other authors works. We argue that the amplitudes of the saturation roughness and of the saturation time scale as {t_0}^{1/2} and t_0, respectively. For models with lateral aggregation, which typically are in the Kardar-Parisi-Zhang (KPZ) class, we show that t_0 ~ 1/p, where p is the probability of the correlated aggregation mechanism to take place. However, t_0 ~ 1/p^2 is obtained in solid-on-solid models with single particle deposition attempts. This group includes models in various universality classes, with numerical examples being provided in the Edwards-Wilkinson (EW), KPZ and Villain-Lai-Das Sarma (nonlinear molecular-beam epitaxy) classes. Most applications are for two-component models in which random deposition, with probability 1-p, competes with a correlated aggregation process with probability p. However, our approach can be extended to other systems with the same crossover, such as the generalized restricted solid-on-solid model with maximum height difference S, for large S. Moreover, the scaling approach applies to all dimensions. In the particular case of one-dimensional KPZ processes with this crossover, we show that t_0 ~ nu^{-1} and nu ~ lambda^{2/3}, where nu and lambda are the coefficients of the linear and nonlinear terms of the associated KPZ equations. The applicability of previous results on models in the EW and KPZ classes is discussed.
description: 14 pages + 5 figures, minor changes, version accepted in Phys. Rev. E
Investigation of glass corrosion in acid solutions with ²⁹Si-MAS-NMR
Creators: name: Böhm, Thomas
name: Leissner, Johanna
name: Chudek, John A.
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1995
Subjects: subject: 660

description: Thin foils of potash-lime-silicate glass were corroded in acid solutions for different time periods. The formation of a gel layer was determined by IR spectroscopy and solution analysis. The applicability of ²⁹Si-MAS-NMR spectroscopy as an analytical tool for characterizing gel layers was investigated. The obtained spectra of increasingly corroded foils show the growth of a new peak at the highfield side of the main glass peak. This peak can be attributed to Q4 silicon units. The formation of Q4 silicon is believed to be due to a condensation reaction of previously hydrolyzed Si-OH groups in the gel layer.
Relativistic Binary Pulsars with Black-Hole Companions
Creators: name: Pfahl, Eric
name: Podsiadlowski, Philipp
name: Rappaport, Saul
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Binaries containing a stellar-mass black hole and a recycled radio pulsar have so far eluded detection. We present a focused investigation of the formation and evolution of these systems in the Galactic disk, highlighting the factors that limit their numbers and the reasons why they may be extremely rare. We surmise that the birthrate of black-hole/recycled-pulsar binaries in the Galactic disk is probably no higher than ~10^{-7}/yr, and may be much less. Simple arguments regarding common-envelope evolution suggest that these binaries should have orbital periods less than 10 hr and an average lifetime of
description: 10 pages, 6 figures, accepted by ApJ, minor changes
Involuntary childlessness : the lived experiences of three women
Creators: name: Mordell, Alison Mary Lindsay
Publisher: name: University of British Columbia
Year: 2009

description: Grief is a universal experience. The way people make sense of their world and process their grief is an individual process. For women experiencing involuntary childlessness, their grief involves multiple, significant, tangible losses, as well as intangible and symbolic losses. A qualitative multiple case study design (using a phenomenological analysis) resulted in the exploration of the lived experiences of three women who were confronted with the grief of involuntary childlessness. The stories of their intense struggle and investment to reach their goal are shared, as well as the devastating and tragic losses they experienced. Part of the process of grieving their losses included healing transformation with the severing of hope, their reinvestment in living and the creation of new meaning in their lives. In-depth interviews were audio taped. The co-researchers described their experiences from the onset of their hopes and plans for children, to their lives years later, where they have processed grief and reconstructed their sense of themselves, including their identification and role as mothers. A phenomenological analysis was conducted to uncover the thematic commonalties. The themes were validated by the co-researchers. The results were compared and contrasted with specific themes related to this study and specific themes identified in Claspell (1984) and Cochran & Claspell (1987) . This study builds on the existing body of research for involuntarily childless women, including their grieving and resolution processes. The findings in this study also add to the existing theoretical frameworks of grief and resolution such as " The Meaning of Grief: A dramaturgical approach to understanding emotion" by Cochran & Claspell (1987). These women's stories also provide greater understanding for therapists working with involuntarily childless individuals.
Non-destructive testing of ceramically bonded refractories - Application of ultrasound and microwaves
Creators: name: Ulizka, Stanislav
name: Hädrich, Helmut
name: Gebhardt, Franz
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1995
Subjects: subject: 660

description: Quality control on refractory bricks is either mostly destructive or methods are used which require samples with a certain geometry. In a joint project between the University of Erlangen and industry the applicability of non-destructive testing methods for sintered refractory bricks was tested. Various materials with artificial flaws were measured in transmission with ultrasound (500 kc/s) as well as with microwaves (24 to 40 Gc/s) and the results were compared. Despite of good results, the testing with ultrasound proved to be unsuitable for the measurements of greater lots, because the open-pore blocks have to be coupled in water. An excellent alternative is the transmission measurement with microwaves. With both methods structural inhomogeneities as well as density differences or inclusions can be detected.
Gender Issues in K-12 Educational Leadership
Creators: name: Sanchez, Dr. Jafeth E.
name: Thornton, Dr. Bill
Publisher: name: Advancing Women in Leadership Journal
Year: 2017

description: This paper serves as a review of the research literature on gender issues in K-12 educational leadership, with a primary focus on the principal and superintendency positions in the United States. The prominent common themes or topics found in the literature are discussed. More specifically, barriers to gender equity in educational leadership are identified, and qualities or strategies used by successful female administrators where such barriers have been broken are noted.
description: Advancing Women in Leadership Journal, Vol. 30 (2010)
Thermal expansion behaviour of unidirectionally SiC fibre-reinforced MAS and BMAS glass-ceramics
Creators: name: Reich, Christian
name: Brückner, Rolf
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1995
Subjects: subject: 660

description: The thermal expansion behaviour of SiC fibre-reinforced Magnesium-Aluminium-Silicate (MAS) and Barium-Magnesium- Aluminium-Silicate (BMAS) glass-ceramics was studied in air as well as in argon furnace atmosphere. The results show that the coefficients of thermal expansion up to a temperature of 800 C are influenced to a minor degree by the furnace atmosphere and to a major degree by the phase composition of the matrices and the fibre concentration. The largest values in air and argon atmosphere are obtained from BMAS(14)/SiC fibre composites with α₁₅₀/₈₀₀ = 3.92 * 10⁻⁶ K⁻¹ and 3.87 * 10⁻⁶ K⁻¹ respectively, at a fibre content of 52 vol.%, while the lowest values are found for BMAS(9)/SiC fibre composites in air with α₁₅₀/₈₀₀ = 3.24 * 10⁻⁶ K⁻¹ and in argon with α₁₅₀/₈₀₀ = 3.11 * 10⁻⁶ K⁻¹ at a fibre content of about 25 vol.%. Increasing fibre concentration leads to increasing thermal expansion. The experimentally determined values were compared with calculated ones by the mixing rule and a good agreement was found, particularly for the BMAS(14) composites.
High-energy cosmic-ray nuclei from high- and low-luminosity gamma-ray bursts and implications for multi-messenger astronomy
Creators: name: Murase, Kohta
name: Ioka, Kunihito
name: Nagataki, Shigehiro
name: Nakamura, Takashi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Gamma-ray bursts (GRBs) are one of the candidates of ultra-high-energy (around 10^18.5 eV) cosmic-ray (UHECR) sources. We investigate high-energy cosmic-ray acceleration including heavy nuclei in GRBs by using Geant 4, and discuss its various implications, taking both of high-luminosity (HL) and low-luminosity (LL) GRBs into account. This is because LL GRBs may also make a significant contribution to the observed UHECR flux if they form a distinct population. We show that not only protons but also heavier nuclei can be accelerated up to ultra-high energies in the internal, (external) reverse and forward shock models. We also show that the condition for ultra-high-energy heavy nuclei such as iron to survive is almost the same as that for about TeV gamma-rays to escape from the source and for high-energy neutrinos not to be much produced. The multi-messenger astronomy by neutrino and GeV-TeV gamma-ray telescopes such as IceCube and KM3Net, GLAST and MAGIC will be important to see whether GRBs can be accelerators of ultra-high-energy heavy nuclei. We also demonstrate expected spectra of high-energy neutrinos and gamma rays, and discuss their detectabilities. In addition, we discuss implictaions of the GRB-UHECR hypothesis. We point out, since the number densities of HL-GRBs and LL-GRBs are quite different, its detemination by UHECR observations is also important.
description: 21 pages, 11 figures, accepted for publication in PRD. Two figures added. Conclusions unchanged
Explicitly connecting T and Buscher dualities in String Theory
Creators: name: Matlock, P.
name: Parthasarathy, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Buscher duality is a sigma-model duality, implemented by transformation of the target space. Not only in the case of a flat target space, but in a general background, should the Buscher duality reduce to the T-duality familiar in the flat-space string context. We exhibit this reduction explicitly using a pp-wave background as a tractable example. String theory is solved in a compactified Nappi-Witten background and the Buscher-dual theory is likewise solved. The Hamiltonian is computed in both cases, and the results are verified to be T-dual.
description: 14 pages, RevTeX
X-Ray Emission from the PeVatron-candidate Supernova Remnant G106.3+2.7
Creators: name: Fujita, Yutaka
name: Bamba, Aya
name: Nobukawa, Kumiko K.
name: Matsumoto, Hironori
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report a discovery of diffuse X-ray emission around the supernova remnant (SNR) G106.3+2.7, which is associated with VER J2227+608 and HAWC J2227+610 and is known as a candidate for a PeV cosmic ray accelerator (PeVatron). We analyze observational data of Suzaku around the SNR and the adjacent pulsar PSR J2229+6114. We find diffuse X-ray emission that is represented by either thermal or non-thermal one. However, the metal abundance for the thermal emission is <0.13 Z_sun, which may be too small in the Milky Way and suggests that the emission is non-thermal. The intensity of the diffuse emission increases toward PSR J2229+6114 in the same way as radio emission, and it is in contrast with gamma-ray emission concentrated on a molecular cloud. The X-ray photon index does not change with the distance from the pulsar and it indicates that radiative cooling is ineffective and particle diffusion is not extremely slow. The X-ray and radio emissions seem to be of leptonic origin and the parent electrons may originate from the pulsar or its wind nebula. The gamma-ray emission appears to be of hadronic origin because of its spacial distribution. The parent protons may be tightly confined in the cloud separately from the diffusing electrons.
description: matched the published version
Gender Equality for Learning Leadership in Undergraduate Business Schools
Creators: name: Brock, Dr. Sabra E.
Publisher: name: Advancing Women in Leadership Journal
Year: 2017

description: Some scholars suggest that business schools are failing the challenge of providing 21st century skills and in particular, they are failing women. As a conceptual model of how people can better adapt to change, the lens of transformational learning was used to shed light on whether women are at a disadvantage to men in transformational learning when exposed to the same experiences at undergraduate business school. Transformational learning occurs when a student's worldview is challenged and when the learner moves beyond old assumptions to see things in a new way. In this quantitative study of 256 undergraduate business students, women experienced comparable rates of transformational learning to their male counterparts and reported experiencing the same learning stimuli in personal relations, class room activities, and life events. It would appear that when exposed to the same stimuli, female undergraduate students are not at a disadvantage to male undergraduate students in learning how to be business leaders through transformational learning.
description: Advancing Women in Leadership Journal, Vol. 30 (2010)
PЕDAGOGIK TA'LIMDA TALABALARNING GNOSЕOLOGIK MOTIVATSIYASINI RIVOJLANTIRISHNING PЕDAGOGIK-PSIXOLOGIK ASPЕKTLARI
Creators: name: Shodmonovna Dilrabo Xudoyqulova
Publisher: name: Zenodo
Year: 2025

description: Annotatsiya: Ushbu maqolada talabalar bilish motivatsiyasini oshirish ta’lim jarayonining muhim qismi ekanligi, bu nafaqat ularning shaxsiy rivojlanishiga, kelajakda mutaxassis sifatida jamiyatga foydali bo‘lishiga ham xizmat qilishi, motivatsiyali talabalardan kuchli va mas’uliyatli kadrlar har qanday mamlakatning barqaror taraqqiyoti uchun muhim ekanligi qayd etilgan.
Neue Technologie beim Altglasrecycling: die Glasvermahlung
Creators: name: Führ, Bernhard
name: Zippe, Bernd-Holger
name: Drescher, Holger
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1995
Subjects: subject: 660

description: Die Anforderungen an die Altglasaufbereitung nehmen ständig zu. Vor diesem Hintergrund wurde in den USA eine neue Technik entwickelt, die diesen Anforderungen hinlänghch gerecht wird. Es handelt sich dabei um die Glasvermahlung, welche die konventionelle teure KSP und Allmetallabscheidetechnik ergänzt oder sogar ersetzt. Durch die Verbindung des differentiellen und autogenen Mahlens (differential und autogenetic grinding) wird nur das Glas zermahlen, während die Verunreinigungen ihre Größe beibehalten. Dadurch kann das gereinigte, feingemahlene Glaspulver abgesiebt werden, und die Verunreinigungen werden ausgeschleust. In den USA sind seit 1991 mehrere dieser Anlagen erfolgreich im Betrieb. Erste Pilotanlagen in Europa werden diesen zukunftsweisenden Trend bestätigen. Durch die gezielte Auswahl und Kombination konventioneller und neuer innovativer Techniken ist es möglich, den ständig steigenden Anforderungen an das aufbereitete Altglas bei gleichzeitig sinkenden Investitionskosten gerecht zu werden.
Study of $B\to K^* ρ, K^*ω$ Decays with Polarization in Perturbative QCD Approach
Creators: name: Huang, Han-Wen
name: Lu, Cai-Dian
name: Morii, Toshiyuki
name: Shen, Yue-Long
name: Song, GeLiang
name: Zhu, Jin
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The $B \to K^{*}ρ$, $ K^{*}ω$ decays are useful to determine the CKM angle $ϕ_3=γ$. Their polarization fractions are also interesting since the polarization puzzle of the $B\to ϕK^*$ decay. We study these decays in the perturbative QCD approach based on $k_T$ factorization. After calculating of the non-factorizable and annihilation type contributions, in addition to the conventional factorizable contributions, we find that the contributions from the annihilation diagrams are crucial. They give dominant contribution to the strong phases and suppress the longitudinal polarizations. Our results agree with the current existing data. We also predict a sizable direct CP asymmetries in $B^+ \to K^{*+}ρ^0$, $B^0 \to K^{*+}ρ^-$, and $B^+ \to K^{*+}ω$ decays, which can be tested by the oncoming measurements in the B factory experiments.
description: 15 pages, latex, including 4 figures
Black Feminism: An Epistemological Framework for Exploring How Race and Gender Impact Black Women's Leadership Development
Creators: name: Rosser-Mims, Dr. Dionne
Publisher: name: Advancing Women in Leadership Journal
Year: 2017

description: This paper presents, through the lens of Black feminism, a historical review of the contextual forces that have shaped and hindered African American's women's leadership development.
description: Advancing Women in Leadership Journal, Vol. 30 (2010)
1/2 BPS Correlator and Free Fermion
Creators: name: Okuyama, Kazumi
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose that in the BMN limit the effective interaction vertex in the 1/2 BPS sector of N=4 SYM is given by the Das-Jevicki-Sakita Hamiltonian. We check for some examples that it reproduces the 1/N correction to the correlation functions of 1/2 BPS operators.
description: 10 pages, 2 figures, lanlmac; v4: references added
Left-symmetric Superalgebra Structures on the Super-Virasoro Algebras
Creators: name: Kong, Xiaoli
name: Bai, Chengming
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Algebra (math.QA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 17B60, 17B68, 17D25

description: In this paper, we classify the compatible left-symmetric superalgebra structures on the super-Virasoro algebras satisfying certain natural conditions.
description: 13 pages, To appear in Pacific Journal of Mathematics
Entropy Function for Heterotic Black Holes
Creators: name: Sen, Ashoke
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use the entropy function formalism to study the effect of the Gauss-Bonnet term on the entropy of spherically symmetric extremal black holes in heterotic string theory in four dimensions. Surprisingly the resulting entropy and the near horizon metric, gauge field strengths and the axion-dilaton field are identical to those obtained by Cardoso et. al. for a supersymmetric version of the theory that contains Weyl tensor squared term instead of the Gauss-Bonnet term. We also study the effect of holomorphic anomaly on the entropy using our formalism. Again the resulting attractor equations for the axion-dilaton field and the black hole entropy agree with the corresponding equations for the supersymmetric version of the theory. These results suggest that there might be a simpler description of supergravity with curvature squared terms in which we supersymmetrize the Gauss-Bonnet term instead of the Weyl tensor squared term.
description: LaTeX file, 23 pages; v2: references added; v3: minor addition; v4: minor changes