cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The absolute stability of nonlinear systems
Creators: name: Chang, Te-Lung
Publisher: name: University of British Columbia
Year: 2011

description: This thesis is in two parts, both considering the absolute stability of nonlinear systems. In the first two chapters the stability of certain classes of nonlinear time invariant systems involving several nonlinearities is considered. A number of graphical methods are given for testing the stability of these systems. The graphical tests are equivalent to a weakened form of the Popov criterion. The third chapter derives a stability condition for nonlinear systems involving a linear time-varying gain. The time-varying gain is assumed to satisfy conditions on its magnitude and rate of change.
O mercado de trabalho dos doutorados em Portugal e seus desafios
Creators: name: Videira, Pedro
Publisher: name: Zenodo
Year: 2021
Subjects: Educação
Doutorados

description: Os doutorados desempenham um papel crucial na produção e disseminação do conhecimento e inovação, mas a sua inserção profissional é complexa. A oferta crescente de doutorados confronta-se com a baixa intensidade tecnológica de muitos sectores da economia portuguesa, que conjugada com os efeitos da crise económica, suscita grandes desafios ao mercado de trabalho de doutorados. A precariedade dos vínculos laborais, a existência de fenómenos de brain drain para outros sistemas científicos e a excessiva concentração de doutorados no ensino superior, em detrimento do tecido empresarial, provoca um subaproveitamento destes recursos humanos altamente qualificados para o potencial de inovação e competitividade das empresas e do país. É necessário assim conjugar políticas públicas ambiciosas de formação doutoral e investimento público em I&D com outras medidas direcionadas à intensificação da base industrial de média e alta tecnologia do país e a estimular a investigação de âmbito privado ou em colaboração público-privada.
description: O presente policy-brief foi realizado no âmbito do Observatório do Emprego Jovem, em parceria com o projeto BRIGHET. O Projecto BRIGHET – Bringing together Higher Education, Training, and Job Quality, é financiado pela FCT e tem a seguinte referência PTDC/SOC-SOC/30016/2017. O Observatório do Emprego Jovem é financiado no âmbito do Financiamento Programático - UIDP/03127/2020, da Unidade de Investigação - Centro de Estudos Sobre a Mudança Socioeconómica e o Território – DINÂMIA'CET-Iscte - financiada por fundos nacionais através da FCT/MCTES.
«Там, где шли бои»: места сражений 1941–1942 гг. на карте современной Балаклавы
Creators: name: Никитина Ирина Витальевна
Publisher: name: Zenodo
Year: 2025
Subjects: бои
Балаклава
оборона
районы
высоты
карта
памятники
battles
Balaklava
defense
districts
heights
map
monuments

description: Аннотация. В статье изучено отражение на карте современной Балаклавы (район г. Севастополя) мест проведения боев в ходе обороны Севастополя и Балаклавы в 1941–1942 гг. Проанализировано значение этих боев и их интенсивность с ноября 1941 по июль 1942 г. Выявлен факт расположения на значительной части полей сражений новой городской застройки. Определены элементы мемориализации ряда таких мест. Сделан вывод, что бои в данном районе сыграли значительную роль в обороне Севастополя 1941–1942 гг. Удержание позиций в окрестностях Балаклавы не позволило противнику вплоть до окончания обороны города серьезно продвинуться в первом секторе обороны. 

Abstract. The article examines the reflection on the map of modern Balaklava (a district of Sevastopol) of the battlefields during the defense of Sevastopol and Balaklava in 1941–1942. The significance of these battles and their intensity from November 1941 to July 1942 are analyzed. The fact that new urban development was located on a significant part of the battlefields is revealed. Elements of memorialization of a number of such places are determined. It is concluded that the battles in this area played a significant role in the defense of Sevastopol in 1941–1942. Holding positions in the vicinity of Balaklava did not allow the enemy to make any significant advances in the first defense sector until the end of the city’s defense.
Sonoluminescence and quantum optical heating
Creators: name: Kurcz, Andreas
name: Capolupo, Antonio
name: Beige, Almut
Publisher: name: arXiv
Year: 2009
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Sonoluminescence is the intriguing phenomenon of strong light flashes from tiny bubbles in a liquid. The bubbles are driven by an ultrasonic wave and need to be filled with noble gas atoms. Approximating the emitted light by blackbody radiation indicates very high temperatures. Although sonoluminescence has been studied extensively, the origin of the sudden energy concentration within the bubble collapse phase is still controversial. It is hence difficult to further increase the temperature inside the bubble for applications like sonochemistry and table top fusion. Here we show that the strongly confined nobel gas atoms inside the bubble can be heated very rapidly by a weak but highly inhomogeneous electric field as it might occur naturally during rapid bubble deformations. An indirect proof of the proposed quantum optical heating mechanism would be the detection of the non-thermal emission of photons in the optical regime prior to the light flash. Our model implies that it is possible to increase the temperature inside the bubble with the help of appropriately detuned laser fields.
description: 23 pages, 7 figures, New J. Phys. (in press)
Half-BPS supergravity solutions and superalgebras
Creators: name: D'Hoker, Eric
name: Estes, John
name: Gutperle, Michael
name: Krym, Darya
name: Sorba, Paul
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We establish a correspondence between certain Lie superalgebras with 16 fermionic generators, and half-BPS solutions to supergravities with 32 supersymmetries. Three cases are discussed. For Type IIB supergravity, we relate semi-simple Lie superalgebras H with 16 fermionic generators which are subalgebras of PSU(2,2|4), to families of half-BPS solutions which are invariant under H, and locally asymptotic to AdS_5 x S^5. Similarly, for M-theory, we relate semi-simple Lie superalgebras H with 16 fermionic generators which are subalgebras of OSp(8^*|4) or OSp(8|4,R) to families of half-BPS solutions which are invariant under H, and locally asymptotic to AdS_7 x S^4 or AdS_4 x S^7 respectively. Possible enhancements to more than 16 supersymmetries, such as 24, are also analyzed. The classification of semi-simple subalgebras of PSU(2,2|4), OSp(8^*|4), and OSp(8|4,R) derived in this paper, leads us to conjecture the existence of various new families of half-BPS solutions to Type IIB supergravity and M-theory.
description: 85 pages, 1 figure, 19 tables. In v2, references added; various corrections and extensive revisions and clarifications made in section 5 and appendix B
The design of structures for strength.
Creators: name: Lam, P
Publisher: name: University Of Tasmania
Year: 2023

description: The philosophy of design of structures by picturing statically admissible states is outlined and applied to various members and structures. The strength of bolted joints under eccentric loading is investigated. The concept of thrust line is applied to multi story bay frames and space frames, and a graphical method of minimum weight design by guessing points of inflexion is presented. Various solutions for the load-carrying capacity of orthotropic slabs are proposed. The strength and safety of the Gladesville Arch Bridge is investigated; the load factors for the bridge are established for three different loading conditions. An experimental method for directly obtaining a shape for an arch dam under a given loading condition is proposed. Load-carrying capacity of arch dams are also estimated by picturing various statically admissible states. The relation between deflexion, buckling, and strength is discussed. The concept of Non-Euler Buckling is introduced. Various practical design considerations are summarized, including the detailed design of joints. In the appendices, tests on arches, slabs, and a shell are reported, together with related calculations. The numerical method of Dynamic Relaxation is applied to the problem of estimating deflexion in elasticplastic frames, the elastic stability problem of over-braced frames, and the non-linear analysis of structures made of,materials having no. tensile strength.
Turbulent diffusion and galactic magnetism
Creators: name: Brandenburg, Axel
name: Del Sordo, Fabio
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using the test-field method for nearly irrotational turbulence driven by spherical expansion waves it is shown that the turbulent magnetic diffusivity increases with magnetic Reynolds numbers. Its value levels off at several times the rms velocity of the turbulence multiplied by the typical radius of the expansion waves. This result is discussed in the context of the galactic mean-field dynamo.
description: 2 pages, 1 figure, to appear in "Magnetic Fields in Diffuse Media", proceedings of Joint Discussion at the 2009 XXVII IAU General Assembly in Rio de Janeiro from 12 to 14 August, 2009
The single cell suspension culture of the licorice plant, Glycyrrhiza glabra
Creators: name: Wu, Chiu Hui
Publisher: name: University of British Columbia
Year: 2011

description: The cells of the licorice plant, Glycyrrhiza glabra, were cultured as a "single cell" suspension. Their growth behaviour, yield and metabolic products were studied. The suspension cultures of the licorice plant were established from the friable calluses obtained from the radicle, cotyledon and hypocotyl of the germinated seeds. The single cells, regardless of their origin showed little difference in cell size and morphology. After an apparent adjustment to the medium, the cells required 11-13 days of incubation to reach the maximum cell yield of 1.2 gm/100 ml medium, dry weight. During the growth period, the pH of the growth medium decreased from pH 5.6 to pH 4.7 in the first few days and then increased to about pH 6. A level of 10% coconut milk in PRL-4-CM medium was found to support good cell growth; the lower the coconut milk level, the longer the growth period required to reach the maximum cell yield. It was also found that 0.57% yeast extract could be used to replace the coconut milk in the PRL-4-CCM medium. The metabolites detected and examined in the licorice single cell suspension culture included a volatile apple aroma, a polysaccharide pectin-like material, steroids and triterpenoids. The analyses of the licorice cell volatile apple aroma found under anaerobic conditions indicated the presence of ethanol and some related esters. The monosaccharides found in the pectin-like polysaccharide hydrolysate were glucose, fructose, galactose, arabinose, xylose, galacturonic acid and glucuronic acid. The pectin-like material in the cell preparations reached a maximum yield of 1.1 mg/ml after one month of growth. Glycyrrhizinic acid, the common licorice constituent found in the root, could not be detected in the suspension cultures. However, several other related compounds which gave typical steroid and triterpenoid reactions were found. Sorbitol and fructose were found to be the two major sugars which accumulated in free form in the licorice cell medium.
Some topics in the theory of ring structures on Abelian groups
Creators: name: Jackett, DR
Publisher: name: University Of Tasmania
Year: 2023

description: In recent years, Fuchs has described the absolute annihilator and the absolute (Jacobson) radical of a torsion group, and Gardner has characterised the absolute annihilator of a completely decomposable torsion-free group. In this thesis the problem of describing the absolute annihilator and the absolute radical of certain abelian groups is considered. This will involve a discussion of the rings on these groups, and the information so obtained allows us to answer several other questions from the theory of ring structures on abelian groups. Complete descriptions of the absolute annihilator are given for vector groups, separable groups, certain mixed groups of torsion-free rank one, reduced algebraically compact groups, cohesive groups, and reduced groups whose quotients mod torsion subgroups are divisible. Partial characterisations are also provided for cotorsion groups, and torsion-free groups of rank two. For the absolute radical of a group, complete descriptions are provided for certain mixed groups of torsion-free rank one, reduced algebraically compact groups, certain strongly indecomposable torsion-free groups of finite rank, and partial descriptions are given for completely decomposable torsion-free groups, cotorsion groups, torsion-free groups of rank two, and cohesive groups. The properties of rings on some of the forementioned torsion-free groups lead us to consider various aspects of nilpotence. Of particular interest are the T-nilpotent rings on completely decomposable torsion-free groups. A bound is also provided for the nil-degree, if it is finite, of certain torsion-free groups. The mixed groups of torsion-free rank one discussed in this thesis motivate an investigation of the additive group of a regular ring. A question of Fuchs concerning these groups is answered in the negative.
Spectroscopic binaries among Hipparcos M giants II. Binary frequency
Creators: name: Frankowski, A.
name: Famaey, B.
name: Van Eck, S.
name: Mayor, M.
name: Udry, S.
name: Jorissen, A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: This paper is the second one in a series devoted to the study of properties of binaries involving M giants. The binary frequency of field M giants is derived and compared with the binary fraction of K giants. Diagrams of the CORAVEL spectroscopic parameter Sb (measuring the average line-width) vs. radial-velocity standard deviation for our samples are used to define appropriate binarity criteria. These then serve to extract the binarity fraction among the M giants. Comparison is made to earlier data on K giants binarity frequency. The Sb parameter is discussed in relation to global stellar parameters and the Sb vs. stellar radius relation is used to identify fast rotators. We find that the spectroscopic binary detection rate among field M giants, in a sample with a low number of velocity measurements (~2), unbiased toward earlier known binaries, is 6.3%. This is less than half of the analogous rate for field K giants, likely resulting from a real difference. This difference originates in the greater difficulty of finding binaries among M giants because of their smaller orbital velocity amplitudes and larger intrinsic jitter and in the different distributions of K and M giants in the eccentricity-period diagram. A larger detection rate was obtained in a smaller M giant sample with more radial velocity measurements per object: 11.1% confirmed plus 2.7% possible binaries. The CORAVEL spectroscopic parameter Sb was found to correlate better with the stellar radius than with either luminosity or effective temperature separately. Two outliers of the Sb vs. stellar radius relation, HD 190658 and HD 219654, have been recognized as fast rotators. The rotation is companion-induced, as both objects turn out to be spectroscopic binaries.
description: 12 pages, 7 figures, accepted for publication in A&A, language editing changes only
Additional file 1 of A comment-driven evidence appraisal approach to promoting research findings into practice when only uncertain evidence is available
Creators: name: Wang, Shuang
name: Kilicoglu, Halil
name: Du, Jian
Publisher: name: figshare
Year: 2023
Subjects: Medicine
Pharmacology
Biological Sciences not elsewhere classified
Information Systems not elsewhere classified
Cancer
Science Policy

description: Additional file 1. Additional materials.
Search for charged Higgs bosons in decays of top quarks in p-pbar collisions at sqrt(s) = 1.96 TeV
Creators: name: CDF Collaboration
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report the recent charged Higgs search in top quark decays in 2.2/fb CDF data. This is the first attempt to search for charged Higgs using fully reconstructed mass assuming H->c-sbar in small tan beta region. No evidence of a charged Higgs is observed in the CDF data, hence 95% upper limits are placed at B(t->H+b) < 0.1-0.3. The upper limits can be used to limit the generic non-SM charged boson production in top quark decays.
description: 7 pages, 2 figures
Feynman's path integral and mutually unbiased bases
Creators: name: Tolar, J
name: Chadzitaskos, G
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Our previous work on quantum mechanics in Hilbert spaces of finite dimensions N is applied to elucidate the deep meaning of Feynman's path integral pointed out by G. Svetlichny. He speculated that the secret of the Feynman path integral may lie in the property of mutual unbiasedness of temporally proximal bases. We confirm the corresponding property of the short-time propagator by using a specially devised N x N -approximation of quantum mechanics in L^2(R) applied to our finite-dimensional analogue of a free quantum particle.
description: 12 pages, submitted to Journal of Physics A: Math. Theor., minor corrections
Applicazioni di fotogrammetria aerea
Creators: name: Dal Col, Alessandro
Publisher: name: INFN Open Access Repository
Year: 2021
Subjects: 3DLab-Sicilia
S. Bernardo

description: Presentazione fatta durante l'incontro del progetto 3DLab-Sicilia con gli Amministratori di alcuni dei Comuni attraversati dal cammino di S. Bernardo. L'agenda dell'incontro è disponibile in questa pagina.
Canada’s Historical Search for Markets
Creators: name: Bercuson, David
Publisher: name: The School of Public Policy Publications
Year: 2020

description: British North America enjoyed special privileges in trade as part of the British Empire until the late 1840s. At that point Britain’s commanding lead in industrial production prompted British policymakers to drop tariffs on virtually all goods coming into Britain. The tariff preferences for colonial goods in the UK disappeared. In the Canadas (the United Province of Canada), merchants, traders and others who earned their living from trade then looked to the United States to provide markets for British North American goods. In 1849 some of them issued a manifesto seeking annexation to the United States. The British response was to negotiate a reciprocity treaty to allow British North American products (mainly natural products) to cross the border with the US duty free. The treaty was in effect from 1854 to 1866 and, combined with US needs for Canadian products in the US Civil War, brought prosperity to Canada. After the end of the treaty, Canadians continued to seek access to the US market but all efforts failed. Still, north-south trade continued to grow with Canada selling natural products to the US and receiving manufactured products in return. Britain continued to be an important market for Canada but the Canada-US trade slowly but inevitably surpassed it. The Canada-US trade was primarily a trade of convenience. An American reciprocity proposal was turned down by Canada in the 1911 federal election, but trade continued to expand especially during the First World War. Right after the Great Depression began, the US imposed very high tariffs on goods coming in to the US. Canada was badly hurt by this measure and sought to expand empire trade at the 1932 Ottawa Conference. But Canada still tried to penetrate US tariffs and finally in 1936 a reciprocity treaty in natural products was completed, followed by a second treaty two years later. These two treaties combined with the Hyde Park Declaration of 1941 further expanded Canada-US trade. Other treaties would follow beginning with the Canada-US Free Trade Agreement of 1989, NAFTA on January 1, 1994. NAFTA has now been replaced by the United States-Mexico-Canada Agreement (USMCA).
description: The School of Public Policy Publications, Vol. 13 (2020)
On Geodesic Motion in Horava-Lifshitz Gravity
Creators: name: Mosaffa, Amir Esmaeil
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose an action for a free particle in Horava-Lifshitz gravity based on Foliation Preserving Diffeomorphisms. The action reduces to the usual relativistic action in the low energy limit and allows for subluminal and superluminal motions with upper and lower bounds on velocity respectively. We find that deviation from general relativity is governed by a position dependent coupling constant which also depends on the mass of the particle. As a result, light-like geodesics are not affected whereas massive particles follow geodesics that become mass dependent and hence the equivalence principle is violated. We make an exact study for geodesics in flat space and a qualitative analysis for those in a spherically symmetric curved background.
description: 12 pages, Dedicated to Farhad Ardalan on his 70th birthday
Optical signal processing and television bandwidth compression
Creators: name: Chu, Thien-Ke
Publisher: name: University of British Columbia
Year: 2011

description: A television band compression scheme which depends primarily on matching in one sense the eye's sensitivity to flicker has been proposed. For a static picture as the source material, it is found that the compression ratio is not directly limited by the flicker effect, but the picture quality assessed subjectively, falls quite fast as the compression ratio is increased. A compression ratio of 1.5:1 is accompanied by a very small drop in subjective quality. Using a "high frequency boost" circuit the compression ratio can be increased to 3:1 under conditions of satisfactory picture quality. Experiments were performed using as source a movie picture, and higher compression ratios than those for the static picture were indicated. All the experiments were performed using a simulated television transmission system. The system was based on a laser source, and it is an improvement on a system designed by Otto Meier in 1968.
Permutation polynomials in one and several variables
Creators: name: Matthews, RW
Publisher: name: University Of Tasmania
Year: 2023

description: Various authors have dealt with problems relating to permutation polynomials over finite systems ([4], [8], [10], [18], [20]-[25],[29]-[33], etc.). In this thesis various known results are extended and several questions are resolved. Chapter 2 begins by considering the problem of finding those permutation polynomials in a single variable amongst some given classes of polynomials. Previously, this question was settled only for cyclic polynomials and Chebyshev polynomials of the first kind. Here we consider the Chebyshev polynomials of the second kind and polynomials of the form (x n- 1)/(x - I). Certain questions on multivariable polynomials are then considered. Chapter 3 deals with questions involving polynomials whose coefficients lie in a subfield of the given field, and considers some combinatorial questions. Chapter 4 resolves the structure of the group of maps of F nq ‚Äövúv¿ F nq induced by the extended Chebyshev polynomials of Lidl and Wells [26]. Chapter 5 extends this further to finite rings -Z/(pe), thus generalising results of Lausch-M‚âà¬±ller-N‚âàv´bauer [18]. Chapter 6 settles some questions concerning the conjecture of Schur on polynomials f(x) ˜ì¬µ Z[x] which permute infinitely many residue fields Fp. It is known ([10]) that these are compositions of cyclic and Chebyshev polynomials of the first kind. In chapter 6 it is determined which of these polynomials have the required property.
Optical Cross Correlation Filters: An Economical Approach for Identifying SNe Ia and Estimating their Redshifts
Creators: name: Scolnic, D. M.
name: Riess, A. G.
name: Huber, M. E.
name: Rest, A.
name: Stubbs, C.
name: Tonry, J. L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Large photometric surveys of transient phenomena, such as Pan-STARRS and LSST, will locate thousands to millions of type Ia supernova candidates per year, a rate prohibitive for acquiring spectroscopy to determine each candidate's type and redshift. In response, we have developed an economical approach to identifying SNe Ia and their redshifts using an uncommon type of optical filter which has multiple, discontinuous passbands on a single substrate. Observation of a supernova through a specially designed pair of these `cross-correlation filters' measures the approximate amplitude and phase of the cross-correlation between the spectrum and a SN Ia template, a quantity typically used to determine the redshift and type of a high-redshift SN Ia. Simulating the use of these filters, we obtain a sample of SNe Ia which is ~98% pure with individual redshifts measured to 0.01 precision. The advantages of this approach over standard broadband photometric methods are that it is insensitive to reddening, independent of the color data used for subsequent distance determinations which reduces selection or interpretation bias, and because it makes use of the spectral features its reliability is greater. A great advantage over long-slit spectroscopy comes from increased throughput, enhanced multiplexing and reduced set-up time resulting in a net gain in speed of up to ~30 times. This approach is also insensitive to host galaxy contamination. Prototype filters were built and successfully used on Magellan with LDSS-3 to characterize three SNLS candidates. We discuss how these filters can provide critical information for the upcoming photometric supernova surveys.
description: Accepted for The Astrophysical Journal. 30 pages, 19 figures
Additional file 1 of Systematic realist synthesis of health-related and lifestyle interventions designed to decrease overweight, obesity and unemployment in adults
Creators: name: Amenyah, Sophia D.
name: Waters, Diane
name: Tang, Wen
name: Fenge, Lee-Ann
name: Murphy, Jane L.
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file 1. Supplementary data.
The optimization of cooling of underground cable systems
Creators: name: Fedoroff, Vitaly L.
Publisher: name: University of British Columbia
Year: 2011

description: A novel, idealized mathematical description is presented of the cooling process of electric power cable system by an integral liquid coolant configuration. A model is first obtained for constant fluid velocities, by the use of Laplace transform and subsequent solution of an ordinary differential equation. A simple integral expression is obtained, which is numerically integrated by the Simpson's rule. The set of curves so obtained, clearly show the delay of the temperature peak vs. the peak of the power demand. A steady state form of control is proposed. Block diagrams of two implemetations are shown. These control systems are designed to maintain the temperature of the effluent constant. An optimization algorithm based on developments given by Sage is presented. This algorithm will optimize the transfer of the cooling system from the initial condition of zero velocity to the steady state operation described above.
Some time-dependent queuing problems with batch arrivals and departures
Creators: name: McNeil, DR
Publisher: name: University Of Tasmania
Year: 2023

description: In this thesis a queue with infinitely many states, compound Poisson arrivals, bulk service, and batch departures is investigated. It is shown that the queue-length probabilities satisfy an infinite system of differential-difference equations (the \birth and death equations\") which are solved in various special cases. A closely allied system of equations is found for the probability distribution function (which may be defective) of the server's busy period. In chapter 1 the queue is specified in terms of the arrival process the service discipline and the departure process. The birth and death equations are then derived in their most general form. In chapter 2 queues with batch arrivals and departures are investigated. This particular case arises by taking the general queue and making the arrival and departure processes independent of the state of the queue. It is here that most of the original work appears as the finite-time behaviour of queues with batch departures does not seem to have been studied in the literature. Chapter 3 embodies an exposition of two papers each by Karlin and McGregor which the author has studied in detail. In this case the arrival and departure processes depend upon the state of the queue. In the final chapter the above special cases are considered \\({t ‚Äövúv¿ ‚Äöv†vª}\\) expressions for the probability distribution of a customer's waiting time are also found."
Spectroscopic binaries among Hipparcos M giants III. The eccentricity-period diagram and mass-transfer signatures
Creators: name: Jorissen, A.
name: Frankowski, A.
name: Famaey, B.
name: Van Eck, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: This paper is the third one in a series devoted to studying the properties of binaries involving M giants. We use a new set of orbits to construct the first (e-logP) diagram of an extensive sample of M giant binaries, to obtain their mass-function distribution, and to derive evolutionary constraints for this class of binaries and related systems. The orbital properties of binaries involving M giants were analysed and compared with those of related families of binaries (K giants, post-AGB stars, barium stars, Tc-poor S stars). The orbital elements of post-AGB stars and M giants are not different, which may very indicate that, for the considered sample of post-AGB binaries, the post-AGB star left the AGB at quite an early stage (M4 or so). Neither are the orbital elements of post-mass-transfer binaries like barium stars very different from those of M giants, suggesting that the mass transfer did not alter the orbital elements much, contrary to current belief. Finally, we show that binary systems with e < 0.4 log P - 1 (with periods expressed in days) are predominantly post-mass-transfer systems, because (i) the vast majority of barium and S systems match this condition, and (ii) these systems have companion masses peaking around 0.6 solar mass, as expected for white dwarfs. The latter property has been shown to hold as well for open-cluster binaries involving K giants, for which a lower bound on the companion mass may easily be set.
description: 14 pages, 12 figures, accepted for publication in A&A, language editing changes only
Extension of representations in quasi *-algebras
Creators: name: Antoine, J. -P.
name: Bagarello, F.
name: Trapani, C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Let $(A, A_o)$ be a topological quasi *-algebra, which means in particular that $A_o$ is a topological *-algebra, dense in $A$. Let $π^o$ be a *-representation of $A_o$ in some pre-Hilbert space ${\cal D} \subset {\cal H}$. Then we present several ways of extending $π^o$, by closure, to some larger quasi *-algebra contained in $A$, either by Hilbert space operators, or by sesquilinear forms on ${\cal D}$. Explicit examples are discussed, both abelian and nonabelian, including the CCR algebra.
The investigation into the disturbance of lipid patterns in human serum by chemical agents.
Creators: name: Mejglo, Zenon Antoni
Publisher: name: University Of Tasmania
Year: 2023

description: The broad aim of the work reported on in this thesis was to study pathologically and chemically induced disturbances of lipid and protein patterns. Originally it was proposed to study chemically disturbed patterns by means of externally introduced lipids, especially those of dietary significance. Orientating studies on technique are given in Chapter I. The evaluation of electrophoretio lipid and protein patterns involves reference to prominent bands. It was proposed to study protein and lipoprotein patterns on cellulose acetate, which permits a complete separation of serum proteins after 1 to 1 1/2 hours electrophoresis. However, no reproducible and otherwise satisfactory method could be developed for the staining of lipids. Chapter II deals with the study of relative mobilities of serum proteins and the correlation with the work done by Parsons and Polya (1). Failure of tetracycline to affect lipaemic serum during experiments of Parsons and Polya (2) it was thought that tetracycline could be suitable as a chemical agent to bring about modification of the lipid patterns. Investigations of this hypothesis are described in Chapter III.
A Spectral Method for Elliptic Equations: The Neumann Problem
Creators: name: Atkinson, Kendall
name: Chien, David
name: Hansen, Olaf
Publisher: name: arXiv
Year: 2009
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65N35

description: Let $Ω$ be an open, simply connected, and bounded region in $\mathbb{R}^{d}$, $d\geq2$, and assume its boundary $\partialΩ$ is smooth. Consider solving an elliptic partial differential equation $-Δu+γu=f$ over $Ω$ with a Neumann boundary condition. The problem is converted to an equivalent elliptic problem over the unit ball $B$, and then a spectral Galerkin method is used to create a convergent sequence of multivariate polynomials $u_{n}$ of degree $\leq n$ that is convergent to $u$. The transformation from $Ω$ to $B$ requires a special analytical calculation for its implementation. With sufficiently smooth problem parameters, the method is shown to be rapidly convergent. For $u\in C^{\infty}(\overlineΩ) $ and assuming $\partialΩ$ is a $C^{\infty}$ boundary, the convergence of $\Vert u-u_{n}\Vert_{H^{1}}$ to zero is faster than any power of $1/n$. Numerical examples in $\mathbb{R}^{2}$ and $\mathbb{R}^{3}$ show experimentally an exponential rate of convergence.
description: 23 pages, 11 figures
Shell Structure of Confined Charges at Strong Coupling
Creators: name: Wrighton, J.
name: Dufty, J. W.
name: Bonitz, M.
name: Kählert, H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A theoretical description of shell structure for charged particles in a harmonic trap is explored at strong coupling conditions of $Γ$ = 50 and 100. The theory is based on an extension of the hypernetted chain approximation to confined systems plus a phenomenological representation of associated bridge functions. Predictions are compared to corresponding Monte Carlo simulations and quantitative agreement for the radial density profile is obtained.
description: 9 pages, 5 figures. Presented at the 13th International Conference on the Physics of Non-Ideal Plasmas (PNP 13) held in Chernogolovka, Russia (September 13-18, 2009). Proceedings to be published in "Contributions to Plasma Physics" (Dec. 2009-Jan. 2010)
A WISE view on extreme AGB stars
Creators: name: Groenewegen, martin
Publisher: name: Zenodo
Year: 2021

description: Based on a WISE colour selection of known very red carbon stars (those with a flat MIR continuum or SiC in absorption) and known Galactic oxygen-rich AGB stars with periods over 1000 days, a sample of 1992 stars was selected for which the time series data from WISE and NEOWISE was investigated.
Critical Phenomena and Diffusion in Complex Systems
Creators: name: Spagnolo, Bernardo
name: Dubkov, Alexander A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Editorial of the International Conference on Critical Phenomena and Diffusion in Complex Systems held on 5--7 December, 2006 in Nizhniy Novgorod State University, Russia and was dedicated to the memory and 80th anniversary of Professor Askold N. Malakhov.
description: 4 pages, to appear in International Journal of Bifurcation and Chaos
Collapses and revivals of stored orbital angular momentum of light in a cold atomic ensemble
Creators: name: Moretti, D.
name: Felinto, D.
name: Tabosa, J. W. R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report on the storage of orbital angular momentum of light in a cold ensemble of cesium atoms. We employ Bragg diffraction to retrieve the stored optical information impressed into the atomic coherence by the incident light fields. The stored information can be manipulated by an applied magnetic field and we were able to observe collapses and revivals due to the rotation of the stored atomic Zeeman coherence for times longer than 15 $μs$.
description: Submitted to Physical Review A
The spectrum of kernel random matrices
Creators: name: Karoui, Noureddine El
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62H10 (Primary) 60F99 (Secondary)

description: We place ourselves in the setting of high-dimensional statistical inference where the number of variables $p$ in a dataset of interest is of the same order of magnitude as the number of observations $n$. We consider the spectrum of certain kernel random matrices, in particular $n\times n$ matrices whose $(i,j)$th entry is $f(X_i'X_j/p)$ or $f(\Vert X_i-X_j\Vert^2/p)$ where $p$ is the dimension of the data, and $X_i$ are independent data vectors. Here $f$ is assumed to be a locally smooth function. The study is motivated by questions arising in statistics and computer science where these matrices are used to perform, among other things, nonlinear versions of principal component analysis. Surprisingly, we show that in high-dimensions, and for the models we analyze, the problem becomes essentially linear--which is at odds with heuristics sometimes used to justify the usage of these methods. The analysis also highlights certain peculiarities of models widely studied in random matrix theory and raises some questions about their relevance as tools to model high-dimensional data encountered in practice.
description: Published in at http://dx.doi.org/10.1214/08-AOS648 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Additional file 1 of Precursor prioritization for p-cymene production through synergistic integration of biology and chemistry
Creators: name: Lin, Hsi-Hsin
name: Mendez‐Perez, Daniel
name: Park, Jimin
name: Wang, Xi
name: Cheng, Yan
name: Huo, Jiajie
name: Mukhopadhyay, Aindrila
name: Lee, Taek Soon
name: Shanks, Brent H.
Publisher: name: figshare
Year: 2022
Subjects: subject: Microbiology
subject: FOS: Biological sciences

description: Additional file 1: Figure S1. Nitrogen physisorption isotherms of Pd/SiAl. Figure S2. Nitrogen physisorption isotherms of Pd/SiO2. Figure S3. Nitrogen physisorption isotherms of Pd/Al2O3. Figure S4. Nitrogen physisorption isotherms of Al2O3. Figure S5. Nitrogen physisorption isotherms of Ni/Al2O3. Figure S6. Nitrogen physisorption isotherms of Cu/Al2O3. Figure S7. Nitrogen physisorption isotherms of Pt/Al2O3. Figure S8. Mass spectrum of limonene. Figure S9. Mass spectrum of 1,8-cineole. Figure S10. Mass spectrum of p-cymene. Figure S11. GC–MS spectrum of products of Pd/SiO2 catalytic reaction with limonene for 3 h. Figure S12. GC–MS spectrum of products of Pd/SiO2 catalytic reaction with 1,8-cineole for 3 h. Figure S13. GC–MS spectrum of products of γ-Al2O3 catalytic reaction with limonene for 3 h. Figure S14. GC–MS spectrum of products of γ-Al2O3 catalytic reaction with 1,8-cineole for 3 h. Figure S15. Deactivation of 100 mg of 5 wt% Pd/Al2O3 with (A) limonene (B)1,8-cineole as the reactants under 250 °C. Figure S16. Production of 1,8-cineole. (A) production at different C/N ratios; (B) production at different induction conditions. Figure S17. Production of 1,8-cineole with HMGR_Da expressed from different plasmid configurations. (A) Plasmid configurations (HMGR_Da in the plasmid is highlighted); (B) 1, 8-cineole titers; (C) Pyruvate accumulation. Production was done in test tubes using fermentation media supplemented with 1.5% glucose, grown at 30 °C. Figure S18. Fed-batch fermentation for Ferm 3_Da. Figure S19. Glucose consumption comparison for Ferm 2 and Ferm 3.
Multi-polylogs at twelfth roots of unity and special values of Witten multiple zeta function attached to the exceptional Lie algebra G_2
Creators: name: Zhao, Jianqiang
Publisher: name: arXiv
Year: 2009
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11M41

description: In this note we shall study the Witten multiple zeta function associated to the exceptional Lie algebra g_2. Our main result shows that its special values at nonnegative integers can always be expressed as rational linear combinations of the multi-polylogs evaluated at 12th roots of unity, except for two irregular cases.
description: 10 pages, more examples are included
The expanding role of the senior secondary colleges
Creators: name: Jatan, R
Publisher: name: University Of Tasmania
Year: 2023

description: Matriculation Colleges in Tasmania were established for a selective intake of students. As the retention rates at grades 11 and 12 has increased over the last two decades, senior secondary colleges have widened their educational programmes to meet the needs of this growing number of students. With the pressure on educational systems to increase their educational provisions, various moves were made to rationalize postcompulsory education. A review of alternative courses and provisions made in other states and overseas shows that educational authorities are gradually responding to the changing needs of the upper secondary students Attempts to broaden the curriculum have been hampered by the existing matriculation requirements. To encourage educational institutions to provide more relevant courses for all students, attempts have been made to issue a more widely recognized certificate. As well as this, it has become necessary to increase the prestige of such certification among students, their parents and the wider community, in order that these new courses may be seen as a viable and acceptable alternative to the more traditional existing matriculation certificate. Tasmania has led other states in providing relevant education for 16 to 19 year olds by the establishment of community colleges. Whilst there have been some initial problems in establishing fully integrated community colleges, the concept remains valid as these colleges facilitate increased provisions of educational opportunity.
A Highly Predictive Ansatz for Leptonic Mixing and CP Violation
Creators: name: Branco, G. C.
name: Silva-Marcos, J. I.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We suggest a simple highly predictive ansatz for charged lepton and light neutrino mass matrices, based on the assumption of universality of Yukawa couplings. Using as input the charged lepton masses and light neutrino masses, the six parameters characterizing the leptonic mixing matrix $V_{PMNS}$, are predicted in terms of a single phase $ϕ$, which takes a value around $ϕ={\fracπ{2}}$. Correlations among variuos physical quantities are obtained, in particular $V^{PMNS}_{13}$ is predicted as a function of $Δm^2_{21}$, $Δm^2_{31}$ and $\sin^2(θ_{sol})$, and restricted to the range $0.167
description: 9 pages, 4 figures
Rank-width and Tree-width of H-minor-free Graphs
Creators: name: Fomin, Fedor V.
name: Oum, Sang-il
name: Thilikos, Dimitrios M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C78, 05C8, 05C10

description: We prove that for any fixed r>=2, the tree-width of graphs not containing K_r as a topological minor (resp. as a subgraph) is bounded by a linear (resp. polynomial) function of their rank-width. We also present refinements of our bounds for other graph classes such as K_r-minor free graphs and graphs of bounded genus.
description: 17 pages
Estilos de aprendizagem e uso de tecnologia na educação a distância
Creators: name: Viana, Helena Brandão
name: Mario, Aline Juliana De Oliveira
Publisher: name: Internet Latent Corpus Journal
Year: 2020

description: Este trabalho teve como objetivo identificar os estilos de aprendizagem dos discentes dos cursos de Pós-Graduação a distância. Para o levantamento de dados desta pesquisa, foi utilizado o questionário Estilos de Uso do Espaço Virtual. O questionário foi enviado a 270 alunos egressos e ativos, dos quais 90 responderam. O resultado da investigação não indicou predominância de um único estilo, mas revelou o Estilo Reflexivo com maior destaque entre os estudantes, dentre eles 98% se identificaram com as perguntas que correspondem a esse estilo. O Estilo Ativo foi representado com 95% das respostas, o Teórico com 93% e o Pragmático se revelou menos representativo com 78%. A diversidade de estilos reveladas possibilita ações direcionadas para cada estilo a fim de que os discentes tenham uma aprendizagem expressiva e eficaz.
description: Internet Latent Corpus Journal, vol. 9 n.º 1 (2019)
A influência da natureza das tarefas na perceção dos alunos quanto à sua aprendizagem
Creators: name: Oliveira, Irina De
name: Armindo, Joana
name: Costa, Mafalda
name: Rocha, Sónia
Publisher: name: Internet Latent Corpus Journal
Year: 2020

description: No contexto do ensino de matemática, o termo tarefa tem um significado muito próprio. Este artigo tem como objetivo investigar de que forma a natureza das tarefas propostas, em contexto de sala de aula, pode influenciar a perceção dos alunos quanto à sua aprendizagem. Dada a reconhecida dificuldade de implementação de certos tipos de tarefas, iremos focar o nosso interesse principalmente na aprendizagem baseada em resolução de problemas. Foram, para o efeito, realizadas três observações de aulas de Matemática A de uma turma do Ensino Secundário, com o objetivo de observar a natureza das tarefas mais frequentemente utilizadas nas mesmas. Como instrumentos de recolha de dados foram elaboradas grelhas de observação e questionários (aplicados aos alunos em questão). Os resultados evidenciam que as tarefas de caráter aberto não são abordadas nas aulas, que o docente recorre duas vezes mais a exercícios do que a problemas e que os alunos, não estando muito familiarizados com este tipo de atividades, referem que as tarefas propostas são a melhor forma para construírem o seu conhecimento.
description: Internet Latent Corpus Journal, vol. 9 n.º 1 (2019)
O Pensamento Crítico em aulas de Geologia Geral do 1º ano universitário
Creators: name: Rodrigues, Décio
name: Pereira, Joana
name: Magalhães, Patrícia
name: Sousa, Renata
Publisher: name: Internet Latent Corpus Journal
Year: 2020

description: O presente artigo aborda a promoção do Pensamento Crítico e as atividades e estratégias aplicadas pelo docente, para o desenvolvimento deste tipo de capacidades em contexto sala-de-aula. Neste sentido, procedeu-se a um estudo de observação de práticas educativas no contexto das Ciências, no 1º ano do ensino superior. Foram realizadas quatro observações, duas aulas Práticas e duas Teórico-Práticas. Este estudo permitiu compreender que a orientação do professor é fundamental nesta dimensão, uma vez que independentemente das atividades aplicadas, só será possível a promoção do Pensamento Crítico caso estas sejam orientadas neste sentido. Verificou-se que as docentes observadas optam por aulas orientadas para a aquisição de conhecimentos, em detrimento de desenvolvimento de capacidades.
description: Internet Latent Corpus Journal, vol. 9 n.º 1 (2019)