cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dealing with Limited Backhaul Capacity in Millimeter Wave Systems: A Deep Reinforcement Learning Approach
Creators: name: Feng, Mingjie
name: Mao, Shiwen
Publisher: name: arXiv
Year: 2019
Subjects: subject: Signal Processing (eess.SP)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Millimeter Wave (MmWave) communication is one of the key technology of the fifth generation (5G) wireless systems to achieve the expected 1000x data rate. With large bandwidth at mmWave band, the link capacity between users and base stations (BS) can be much higher compared to sub-6GHz wireless systems. Meanwhile, due to the high cost of infrastructure upgrade, it would be difficult for operators to drastically enhance the capacity of backhaul links between mmWave BSs and the core network. As a result, the data rate provided by backhaul may not be sufficient to support all mmWave links, the backhaul connection becomes the new bottleneck that limits the system performance. On the other hand, as mmWave channels are subject to random blockage, the data rates of mmWave users significantly vary over time. With limited backhaul capacity and highly dynamic data rates of users, how to allocate backhaul resource to each user remains a challenge for mmWave systems. In this article, we present a deep reinforcement learning (DRL) approach to address this challenge. By learning the blockage pattern, the system dynamics can be captured and predicted, resulting in efficient utilization of backhaul resource. We begin with a discussion on DRL and its application in wireless systems. We then investigate the problem backhaul resource allocation and present the DRL based solution. Finally, we discuss open problems for future research and conclude this article.
description: Appear to IEEE Communications Magazine. Version with math contents and equations
Hyperolius balfouri
Creators: name: Nečas, Tadeáš
name: Kielgast, Jos
name: Chinemerem, Ikechukwu G.
name: Rödel, Mark-Oliver
name: Dolinay, Matej
name: Gvoždík, Václav
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Amphibia
Anura
Hyperoliidae
Hyperolius
Hyperolius balfouri

description: H Y PEROLIUS B ALFOURI GROUP
Hyperolius concolor superspecies of SchiØtz (1975) [partim]; Group II of Amiet (2012) [partim].
Contents (based on genetic data): H. balfouri (Werner 1908) — H. balfouri balfouri, H. balfouri viridistriatus Monard 1951; H. kivuensis Ahl, 1931; H. schoutedeni Laurent, 1943 (Bamba-Kaya et al. 2019, Portik et al. 2019; this study).
Area of occurrence: Central Africa from western Cameroon in the North-West, South Sudan and south-western Ethiopia in the North-East, Malawi in the South-East, to central Angola in the South-West, with the exception of the Lower Guinean Forests.
description: Published as part of Nečas, Tadeáš, Kielgast, Jos, Chinemerem, Ikechukwu G., Rödel, Mark-Oliver, Dolinay, Matej & Gvoždík, Václav, 2024, The phylogenetic position of Hyperolius sankuruensis (Anura: Hyperoliidae) reveals biogeographical affinity between the central Congo and West Africa, and illuminates the taxonomy of Hyperolius concolor, pp. 1-19 in Zoological Journal of the Linnean Society 202 on page 14, DOI: 10.1093/zoolinnean/zlae046, http://zenodo.org/record/14764284
Melanonidae Goode & Bean 1896
Creators: name: Laan, Richard Van Der
name: Eschmeyer, William N.
name: Fricke, Ronald
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Gadiformes
Melanonidae

description: Family Melanonidae Goode & Bean 1896
 Melanoninae Goode & Bean 1896:353, 380 [ref. 1848] (subfamily) Melanonus
description: Published as part of Laan, Richard Van Der, Eschmeyer, William N. & Fricke, Ronald, 2014, Family-group names of Recent fishes, pp. 1-230 in Zootaxa 3882 (2) on page 66, DOI: 10.11646/zootaxa.3882.1.1, http://zenodo.org/record/7047777
Melanocetidae Gill 1878
Creators: name: Laan, Richard Van Der
name: Eschmeyer, William N.
name: Fricke, Ronald
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Lophiiformes
Melanocetidae

description: Family Melanocetidae Gill 1878
 Melanocetinae Gill 1878b:227 [ref. 1718] (subfamily) Melanocetus
description: Published as part of Laan, Richard Van Der, Eschmeyer, William N. & Fricke, Ronald, 2014, Family-group names of Recent fishes, pp. 1-230 in Zootaxa 3882 (2) on page 70, DOI: 10.11646/zootaxa.3882.1.1, http://zenodo.org/record/7047777
A Mg-pair isoelectronic bound exciton identified by its isotopic fingerprint in $^{28}$Si
Creators: name: Abraham, Rohan
name: DeAbreu, Adam
name: Morse, Kevin
name: Shuman, Valentina
name: Portsel, Leonid
name: Lodygin, Anatoly
name: Astrov, Yuri
name: Abrosimov, Nikolay
name: Pavlov, Sergey
name: Hübers, Heinz-Wilhelm
name: Simmons, Stephanie
name: Thewalt, Michael
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We use the greatly improved optical linewidths provided by highly enriched $^{28}$Si to study a photoluminescence line near 1017 meV previously observed in the luminescence spectrum of natural Si diffused with Mg, and suggested to result from the recombination of an isoelectronic bound exciton localized at a Mg-pair center. In $^{28}$Si this no-phonon line is found to be comprised of five components whose relative intensities closely match the relative abundances of Mg-pairs formed by random combinations of the three stable isotopes of Mg, thus confirming the Mg-pair hypothesis. We further present the results of temperature dependence studies of this center that reveal unusual and as yet unexplained behaviour.
description: 5 pages, 4 figures
Thermodynamic and Kinetic Analysis of Sensitivity Amplification in Biological Signal Transduction
Creators: name: Qian, Hong
Publisher: name: arXiv
Year: 2002
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Quantitative Biology (q-bio)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Based on a thermodynamic analysis of the kinetic model for the protein phosphorylation-dephosphorylation cycle, we study the ATP (or GTP) energy utilization of this ubiquitous biological signal transduction process. It is shown that the free energy from hydrolysis inside cells, $ΔG$ (phosphorylation potential), controls the amplification and sensitivity of the switch-like cellular module; the response coefficient of the sensitivity amplification approaches the optimal 1 and the Hill coefficient increases with increasing $ΔG$. We discover that zero-order ultrasensitivity is mathematically equivalent to allosteric cooperativity. Furthermore, we show that the high amplification in ultrasensitivity is mechanistically related to the proofreading kinetics for protein biosynthesis. Both utilize multiple kinetic cycles in time to gain temporal cooperativity, in contrast to allosteric cooperativity that utilizes multiple subunits in a protein.
description: 19 pages, 7 figures
Diceratiidae Regan & Trewavas 1932
Creators: name: Laan, Richard Van Der
name: Eschmeyer, William N.
name: Fricke, Ronald
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Lophiiformes
Diceratiidae

description: Family Diceratiidae Regan & Trewavas 1932
 Diceratiidae Regan & Trewavas 1932:4, 57 [ref. 3682] (family) Diceratias [family name sometimes seen as Diceratididae; senior objective synonym of Aeschynichthyidae Golvan 1962]
 Aeschynichthyidae Golvan 1962:173 [ref. 13459] (family) Aeschynichthys [junior objective synonym of Diceratiidae, invalid, Article 61.3.2]
description: Published as part of Laan, Richard Van Der, Eschmeyer, William N. & Fricke, Ronald, 2014, Family-group names of Recent fishes, pp. 1-230 in Zootaxa 3882 (2) on page 70, DOI: 10.11646/zootaxa.3882.1.1, http://zenodo.org/record/7047777
Hyperolius castaneus Ahl 1931
Creators: name: Nečas, Tadeáš
name: Kielgast, Jos
name: Chinemerem, Ikechukwu G.
name: Rödel, Mark-Oliver
name: Dolinay, Matej
name: Gvoždík, Václav
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Amphibia
Anura
Hyperoliidae
Hyperolius
Hyperolius castaneus

description: HYPEROLIUS CASTANEUS GROUP
Hyperolius castaneus group ofDehling and Sinsch (2019); Group D of Ernst et al. (2021).
Contents (based on genetic data): H. castaneus Ahl, 1931; H. constellatus Laurent, 1951; H. cystocandicans Richards and SchiØtz 1977; H. discodactylus Ahl, 1931; H. frontalis Laurent 1950; H. jackie Dehling 2012; H. lateralis Laurent 1940 (Greenbaum et al. 2013, Dehling and Sinsch 2019, Portik et al. 2019, Ernst et al. 2021).
Area of occurrence: Eastern Democratic Republic of the Congo, Rwanda, Burundi, Uganda, western Tanzania, and western Kenya. Hyperolius cystocandicans is known from central Kenya.
Other potential members: Hyperolius atrigularis Laurent 1941 and H. kibarae Laurent, 1957 are possibly related to this group (Laurent 1957, SchiØtz 1999). Laurent (1951), based on morphological data, found H. leleupi Laurent, 1951 to be closely related to H. castaneus (and H. atrigularis). Laurent (1972) suggested that the single specimen of H. xenorhinus Laurent, 1972 from Virunga NP, eastern Democratic Republic of Congo may be an aberrant individual of H. discodactylus. SchiØtz (1999) suggested that further investigation of H. frontalis, H. diaphanus Laurent, 1972, H. chrysogaster Laurent 1950, H. leucotaenius Laurent 1950, and H. xenorhinus might show them conspecific.
description: Published as part of Nečas, Tadeáš, Kielgast, Jos, Chinemerem, Ikechukwu G., Rödel, Mark-Oliver, Dolinay, Matej & Gvoždík, Václav, 2024, The phylogenetic position of Hyperolius sankuruensis (Anura: Hyperoliidae) reveals biogeographical affinity between the central Congo and West Africa, and illuminates the taxonomy of Hyperolius concolor, pp. 1-19 in Zoological Journal of the Linnean Society 202 on pages 14-15, DOI: 10.1093/zoolinnean/zlae046, http://zenodo.org/record/14764284
Vertical transport and domain formation in multiple quantum wells
Creators: name: Wacker, Andreas
Publisher: name: arXiv
Year: 1997
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this book article effects related to the vertical transport in weakly coupled multiple quantum wells are reviewed. A self-contained microscopical model for the calculation of the well-to-well currents without any fittings parameters is presented. The model exhibits the well-known peaks in the current-field relation in quantitative agreement with experiments. This local current-field relation is used as an input for the calculation of the transport in the extended structure consisting of many periods. Here both the formation of stationary field domains as well as self-sustained current oscillations are found in good agreement with experimental data. The underlying physics of these nonlinear phenomena is discussed in detail.
description: 36 pages
Thaumatichthyidae Smith & Radcliffe 1912
Creators: name: Laan, Richard Van Der
name: Eschmeyer, William N.
name: Fricke, Ronald
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Lophiiformes
Thaumatichthyidae

description: Family Thaumatichthyidae Smith & Radcliffe 1912
 Thaumatichthyidae Smith & Radcliffe 1912:579 [ref. 4057] (family) Thaumatichthys
 Galatheathaumatidae Whitley 1970:246 [ref. 6601] (family) Galatheathauma
description: Published as part of Laan, Richard Van Der, Eschmeyer, William N. & Fricke, Ronald, 2014, Family-group names of Recent fishes, pp. 1-230 in Zootaxa 3882 (2) on page 71, DOI: 10.11646/zootaxa.3882.1.1, http://zenodo.org/record/7047777
Magnetic phase separation in a frustrated ferrimagnetic chain under a magnetic field
Creators: name: Nascimento-Junior, A. M. do
name: Montenegro-Filho, R. R.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We use density matrix renormalization group to study the first-order quantum phase transition induced by a magnetic field $h$ in a frustrated ferrimagnetic chain. The magnetization ($m$) curve as a function of $h$ presents a macroscopic jump and the energy curve as a function of $m$ has two global minima. We characterize the two competing phases and study the phase-separated states in the coexistence region. Also, we observe that the transition is accompanied by an increase in the number of itinerant singlet pairs between sites in the unit cells of the chain. Finally, we identify the critical point at the end of the first-order transition line and a crossover line.
description: 7 pages, 5 figures
The static spacetime relative acceleration for the general free fall and its possible experimental test
Creators: name: Bunchaft, F.
name: Carneiro, S.
Publisher: name: arXiv
Year: 1998
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Mishra has recently established, using a generic static metric, the relative local proper-time 3-acceleration of a test-particle in one-dimensional free fall relative to a static reference frame in any static spacetime. In this paper, on the grounds of gravitoelectromagnetism we establish, in a covariant spacetime form, the relative 4-acceleration for the general free fall, indicating its canonical representation with its 3-space cinematical content. Then we obtain the relation between this representation and the very known expression for the relative free fall acceleration in Fermi coordinates. Taking this into account, it is shown that an experiment with relativistic beams in a circular accelerator, modelled by Fermi coordinates, recently proposed by Moliner et al, can test the here established covariant result and, therefore, can also verify Mishra's formula. This possibility of experimental verification, besides its intrinsic importance, can answer a recent inquire by Vigier, related to his recent proposal of derivation of inertial forces.
description: To appear in Classical and Quantum Gravity, 15 pages, Latex
Quantum fields in Bianchi type I spacetimes. The Kasner metrc
Creators: name: Matyjasek, Jerzy
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Vacuum polarization of the quantized massive fields in Bianchi type I spacetime is investigated from the point of view of the adiabatic approximation and the Schwinger-DeWitt method. It is shown that both approaches give the same results that can be used in construction of the trace of the stress-energy tensor of the conformally coupled fields. The stress-energy tensor is calculated in the Bianchi type I spacetime and the back reaction of the quantized fields upon the Kasner geometry is studied. A special emphasis is put on the problem of isotropization, studied with the aid of the directional Hubble parameters. Similarities with the quantum corrected interior of the Schwarzschild black hole is briefly discussed.
Nuclear-polarization correction to the bound-electron g factor in heavy hydrogenlike ions
Creators: name: Nefiodov, A. V.
name: Plunien, G.
name: Soff, G.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The influence of nuclear polarization on the bound-electron $g$ factor in heavy hydrogenlike ions is investigated. Numerical calculations are performed for the K- and L-shell electrons taking into account the dominant virtual nuclear excitations. This determines the ultimate limit for tests of QED utilizing measurements of the bound-electron $g$ factor in highly charged ions.
description: 12 pages, 1 figure
Hyperolius cinnamomeoventris Bocage 1866
Creators: name: Nečas, Tadeáš
name: Kielgast, Jos
name: Chinemerem, Ikechukwu G.
name: Rödel, Mark-Oliver
name: Dolinay, Matej
name: Gvoždík, Václav
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Amphibia
Anura
Hyperoliidae
Hyperolius
Hyperolius cinnamomeoventris

description: HYPEROLIUS CINNAMOMEOVENTRIS GROUP
Group II ofAmiet (2012) [partim]; Hyperolius cinnamomeoventris complex of Bell et al. (2019); H. cinnamomeoventris group of Dehling and Sinsch (2019); Group H of Ernst et al. (2021).
Contents (based on genetic data): H. cinnamomeoventris Bocage 1866; H. drewesi Bell 2016; H. molleri (Berdriaga 1892); H. olivaceus Buchholz and Peters, 1876; H. thomensis Bocage 1886; H. veithi Schick, Kielgast, Rödder, Muchai, Burger and Lötters, 2010 (Schick et al. 2010, Bell et al. 2015, 2019, Portik et al. 2019).
Area of occurrence: Central Africa from central Cameroon in the North-West, the islands of the Gulf of Guinea in the West, South Sudan and western Kenya in the North-East, to south-western Angola in the South-West.
Other potential members: Channing and Rödel (2019) considered H. vilhenai Laurent 1964 from northern Angola to be part of the H. cinnamomeoventris complex based on unpublished molecular data. Hyperolius polli Laurent, 1943 was mentioned to be similar to H. cinnamomeoventris (Laurent 1954).
description: Published as part of Nečas, Tadeáš, Kielgast, Jos, Chinemerem, Ikechukwu G., Rödel, Mark-Oliver, Dolinay, Matej & Gvoždík, Václav, 2024, The phylogenetic position of Hyperolius sankuruensis (Anura: Hyperoliidae) reveals biogeographical affinity between the central Congo and West Africa, and illuminates the taxonomy of Hyperolius concolor, pp. 1-19 in Zoological Journal of the Linnean Society 202 on page 15, DOI: 10.1093/zoolinnean/zlae046, http://zenodo.org/record/14764284
Predicting Destinations by Nearest Neighbor Search on Training Vessel Routes
Creators: name: Roşca, Valentin
name: Onica, Emanuel
name: Diac, Paul
name: Amariei, Ciprian
Publisher: name: arXiv
Year: 2018
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: The DEBS Grand Challenge 2018 is set in the context of maritime route prediction. Vessel routes are modeled as streams of Automatic Identification System (AIS) data points selected from real-world tracking data. The challenge requires to correctly estimate the destination ports and arrival times of vessel trips, as early as possible. Our proposed solution partitions the training vessel routes by reported destination port and uses a nearest neighbor search to find the training routes that are closer to the query AIS point. Particular improvements have been included as well, such as a way to avoid changing the predicted ports frequently within one query route and automating the parameters tuning by the use of a genetic algorithm. This leads to significant improvements on the final score.
C2H N=1-0 and N2H+ J=1-0 observations of Planck Galactic cold clumps
Creators: name: Liu, Xunchuan
name: Wu, Yuefang
name: Zhang, Chao
name: Liu, Tie
name: Yuan, Jinghua
name: Qin, Sheng-Li
name: Ju, Bing-gang
name: Li, Li-Xin
Publisher: name: arXiv
Year: 2019
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A survey of C2H N=1-0 and N2H+ J=1-0 toward Planck Galactic cold clumps (PGCCs) was performed using the Purple Mountain Observatory's 13.7 m telescope. C2H and N2H+ were chosen to study the chemical evolutionary states of PGCCs. Among 121 observed molecular cores associated with PGCCs, 71 and 58 are detected with C2H N=1-0 and N2H+ J=1-0, respectively. The detected lines of most sources can be fitted with a single component with compatible Vlsr and line widths, which confirms that these PGCC cores are very cold (with gas temperatures 9-21 K) and quiescent while still dominanted by turbulence. The ratio between the column densities of C2H and N2H+ (N(C2H)/N(N2H+)) is found to be a good tracer for the evolutionary states of PGCC cores. Gas-grain chemical model can reproduce the decreasing trend of N(C2H)/N(N2H+) as a function of time. The cores with the lowest abundances of N2H+ (X[N2H+] < 10^{-10}) are the youngest, and have nearly constant abundances of C2H. In evolved cores with X[N2H+] ~ 1E-9, abundances of C2H drop quickly as the exhaustion of carbon atoms. Although these PGCC cores are in different evolutionary states, they are all quite young (<5E5 yr) with N(C2H) > N(N2H+). Mapping observations are carried out toward 20 PGCC cores. The PGCC cores in Cepheus have lower N(C2H)/N(N2H+) and larger line widths compared with those in Taurus. This implies that PGCC cores in Taurus are less chemically evolved than those in Cepheus.
description: 23 pages, 6 figures, 5 tables
Hyperolius concolor
Creators: name: Nečas, Tadeáš
name: Kielgast, Jos
name: Chinemerem, Ikechukwu G.
name: Rödel, Mark-Oliver
name: Dolinay, Matej
name: Gvoždík, Václav
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Amphibia
Anura
Hyperoliidae
Hyperolius
Hyperolius concolor

description: HYPEROLIUS CONCOLOR GROUP
Hyperolius concolor superspecies of SchiØtz (1975) [partim]; Group II of Amiet (2012) [partim]; Hyperolius cinnamomeoventris group of Dehling and Sinsch (2019) [partim]; Group H of Ernst et al. (2021) [partim].
Contents (based on genetic data): H. bobirensis SchiØtz, 1967; H. concolor (Hallowell, 1844); H. guttatus Peters, 1875 stat. nov.; H. ibadanensis SchiØtz, 1967 stat. nov.; H. sankuruensis Laurent, 1979; Hyperolius sp. (Hyperolius sp. 1 sensu Burger et al. 2004, Hyperolius sp. B Gabon sensu Veith et al. 2009); H. zonatus Laurent, 1958 (Burger et al. 2004, Veith et al. 2009, Portik et al. 2019; this study).
Area of occurrence: From south-eastern Sierra Leone in the West to south-western Cameroon in the East. Doudou Mts. in south-western Gabon and in the central Congo Basin south of the Congo River.
Other potential members: Perret (1966) suggested that H. stenodactylus Ahl, 1931 from southern Cameroon (type locality: Bipindi) potentially represents a synonym of ‘ H. concolor ’. Considering the geographical origin of H. stenodactylus, it may be a synonym of H. guttatus, but see Discussion.
description: Published as part of Nečas, Tadeáš, Kielgast, Jos, Chinemerem, Ikechukwu G., Rödel, Mark-Oliver, Dolinay, Matej & Gvoždík, Václav, 2024, The phylogenetic position of Hyperolius sankuruensis (Anura: Hyperoliidae) reveals biogeographical affinity between the central Congo and West Africa, and illuminates the taxonomy of Hyperolius concolor, pp. 1-19 in Zoological Journal of the Linnean Society 202 on page 15, DOI: 10.1093/zoolinnean/zlae046, http://zenodo.org/record/14764284
Non-locality and quasiclassical reality in Kent's formulation of relativistic quantum theory
Creators: name: Butterfield, Jeremy
name: Marsh, Brendan
Publisher: name: arXiv
Year: 2019
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: We report Adrian Kent's proposed framework for a realist, one-world, Lorentz-invariant formulation of quantum theory. The idea is to postulate a final boundary condition: in effect, a late-time distribution of mass-energy recording how photons scattered off macroscopic objects. Nature selects this final boundary condition with the orthodox late-time Born probability; and this defines the probability space of events, to give a realist quantum theory. We emphasize two topics. First, we consider this formulation's verdicts about traditional locality conditions, such as Outcome Independence and Parameter Independence. Second, we discuss a possible amendment to Kent's proposal that, roughly speaking, allows for the emergence of a quasiclassical history even when mass-energy is shielded or delayed from appearing in the final boundary condition.
description: 14 pages, 7 figures, submitted to Journal of Physics: Conference Series
Distribution of complex algebraic numbers on the unit circle
Creators: name: Götze, Friedrich
name: Gusakova, Anna
name: Kabluchko, Zakhar
name: Zaporozhets, Dmitry
Publisher: name: arXiv
Year: 2018
Subjects: subject: Number Theory (math.NT)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: Primary, 11N45, secondary, 11C08, 30C15

description: For $-π\leqβ_1
Hyperolius langi Noble 1924
Creators: name: Nečas, Tadeáš
name: Kielgast, Jos
name: Chinemerem, Ikechukwu G.
name: Rödel, Mark-Oliver
name: Dolinay, Matej
name: Gvoždík, Václav
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Amphibia
Anura
Hyperoliidae
Hyperolius
Hyperolius langi

description: HYPEROLIUS L ANGI GROUP
Group II of Amiet (2012) [partim].
Contents (based on genetic data): H. adametzi Ahl, 1931; H. kuligae Mertens 1940; H. langi Noble 1924; H. major Laurent, 1957 (Portik et al. 2019; this study).
Area of occurrence: Disjunct distribution in Cameroon and Gabon, north-western Democratic Republic of the Congo and Uganda, and southern Democratic Republic of the Congo.
description: Published as part of Nečas, Tadeáš, Kielgast, Jos, Chinemerem, Ikechukwu G., Rödel, Mark-Oliver, Dolinay, Matej & Gvoždík, Václav, 2024, The phylogenetic position of Hyperolius sankuruensis (Anura: Hyperoliidae) reveals biogeographical affinity between the central Congo and West Africa, and illuminates the taxonomy of Hyperolius concolor, pp. 1-19 in Zoological Journal of the Linnean Society 202 on page 15, DOI: 10.1093/zoolinnean/zlae046, http://zenodo.org/record/14764284
General approach to potentials with two known levels
Creators: name: Dolya, S. N.
name: Zaslavskii, O. B.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We present the general form of potentials with two given energy levels $E_{1}$, $E_{2}$ and find corresponding wave functions. These entities are expressed in terms of one function $ξ(x)$ and one parameter $ΔE=E_{2}$-$E_{1}$. We show how the quantum numbers of both levels depend on properties of the function $ξ(x)$. Our approach does not need resorting to the technique of supersymmetric (SUSY) quantum mechanics but automatically generates both the potential and superpotential.
description: 14 pages, REVTeX 3.0. In v.2 misprints and inaccuracies in presentation corrected, discussion of 3-dim. case added. In v.3 misprint in eq. 41, several typos and inaccuracies in English corrected. To be published in J. of Phys. A: Math. Gen
Galilean invariance restoration on the lattice
Creators: name: Li, Ning
name: Elhatisari, Serdar
name: Epelbaum, Evgeny
name: Lee, Dean
name: Lu, Bing-Nan
name: Meißner, Ulf-G.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We consider the breaking of Galilean invariance due to different lattice cutoff effects in moving frames and a nonlocal smearing parameter which is used in the construction of the nuclear lattice interaction. The dispersion relation and neutron-proton scattering phase shifts are used to investigate the Galilean invariance breaking effects and ways to restore it. For $S$-wave channels, ${}^1S_0$ and ${}^3S_1$, we present the neutron-proton scattering phase shifts in moving frames calculated using both Lüscher's formula and the spherical wall method, as well as the dispersion relation. For the $P$ and $D$ waves, we present the neutron-proton scattering phase shifts in moving frames calculated using the spherical wall method. We find that the Galilean invariance breaking effects stemming from the lattice artifacts partially cancel those caused by the nonlocal smearing parameter. Due to this cancellation, the Galilean invariance breaking effect is small, and the Galilean invariance can be restored by introducing Galilean invariance restoration operators.
description: 13 pages, 7 figures
Separation of isomeric glycans by ion mobility spectrometry – the impact of fluorescent labelling
Creators: name: Manz, Christian
name: Grabarics, Márkó
name: Hoberg, Friederike
name: Pugini, Michele
name: Stuckmann, Alexandra
name: Struwe, Weston B.
name: Pagel, Kevin
Publisher: name: Freie Universität Berlin
Year: 2019
Subjects: subject: isomeric glycans
subject: ion mobility spectrometry
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::541 Physikalische Chemie

description: The analysis of complex oligosaccharides is traditionally based on multidimensional workflows where liquid chromatography is coupled to tandem mass spectrometry (LC-MS/MS). Due to the presence of multiple isomers, which cannot be distinguished easily using tandem MS, a detailed structural elucidation is still challenging in many cases. Recently, ion mobility spectrometry (IMS) showed great potential as an additional structural parameter in glycan analysis. While the time-scale of the IMS separation is fully compatible to that of LC-MS-based workflows, there are very few reports in which both techniques have been directly coupled for glycan analysis. As a result, there is little knowledge on how the derivatization with fluorescent labels as common in glycan LC-MS affects the mobility and, as a result, the selectivity of IMS separations. Here, we address this problem by systematically analyzing six isomeric glycans derivatized with the most common fluorescent tags using ion mobility spectrometry. We report >150 collision cross-sections (CCS) acquired in positive and negative ion mode and compare the quality of the separation for each derivatization strategy. Our results show that isomer separation strongly depends on the chosen label, as well as on the type of adduct ion. In some cases, fluorescent labels significantly enhance peak-to-peak resolution which can help to distinguish isomeric species.
Robust operation of a GaAs tunable barrier electron pump
Creators: name: Giblin, S. P.
name: Bae, M. -H.
name: Kim, N.
name: Ahn, Ye-Hwan
name: Kataoka, M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We demonstrate the robust operation of a gallium arsenide tunable-barrier single-electron pump operating with 1 part-per-million accuracy at a temperature of $1.3$~K and a pumping frequency of $500$~MHz. The accuracy of current quantisation is investigated as a function of multiple control parameters, and robust plateaus are seen as a function of three control gate voltages and RF drive power. The electron capture is found to be in the decay-cascade, rather than the thermally-broadened regime. The observation of robust plateaus at an elevated temperature which does not require expensive refrigeration is an important step towards validating tunable-barrier pumps as practical current standards.
description: 13 pages, 7 figures (4 in main text and 3 in supplementary info
Revisiting patterns in EU regulatory social policy: (still) supporting the market or social goals in their own right?
Creators: name: Hartlapp, Miriam
Publisher: name: Freie Universität Berlin
Year: 2019
Subjects: subject: EU social policy
subject: regulation
subject: labour law
subject: freedom of movement
subject: party politics
subject: 300 Sozialwissenschaften::320 Politikwissenschaft::320 Politikwissenschaft

description: Despite the fact that economic concerns are the main driver of the EU integration process, integration does carry a substantial social dimension. Yet, it remains an open question whether this social dimension ‘only’ supports the market or whether goals such as social justice, solidarity and employment conditions are independent of or even work against goals of market efficiency. To address this question the paper presents an original dataset on all 346 binding EU social policy acts adopted since the Union’s founding. In a descriptive approach, I contrast instruments and dynamics in areas and subfields connected more closely to the common market with those more directly constituting a social dimension in its own right. On this basis, I argue that the shape of EU social policy has substantially changed, strengthening its market-supporting dimension while weakening policy focused on its social dimension. The paper opens up for discussion possible political dynamics driving these patterns.
Dissipative particle dynamics: the equilibrium for finite time steps
Creators: name: Marsh, C. A.
name: Yeomans, J. M.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Dissipative particle dynamics (DPD) is a relatively new technique which has proved successful in the simulation of complex fluids. We caution that for the equilibrium achieved by the DPD simulation of a simple fluid the temperature depends strongly on the time step. An analytic expression for the dependence is obtained and shown to agree well with simulation results.
description: 5 pages, LaTeX, 1 Postscript figure, submitted to Europhys.Letts., Algebraic corrections made to final result
Tunable out-of-plane excitons in 2D single crystal perovskites
Creators: name: Fieramosca, A.
name: De Marco, L.
name: Passoni, M.
name: Polimeno, L.
name: Rizzo, A.
name: Rosa, B. L. T.
name: Cruciani, G.
name: Dominici, L.
name: De Giorgi, M.
name: Gigli, G.
name: Andreani, L. C.
name: Gerace, D.
name: Ballarini, D.
name: Sanvitto, D.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Hybrid organic-inorganic perovskites have emerged as very promising materials for photonic applications, thanks to the great synthetic versatility that allows to tune their optical properties. In the two-dimensional (2D) crystalline form, these materials behave as multiple quantum-well heterostructures with stable excitonic resonances up to room temperature. In this work strong light-matter coupling in 2D perovskite single-crystal flakes is observed, and the polarization-dependent exciton-polariton response is used to disclose new excitonic features. For the first time, an out-of-plane component of the excitons is observed, unexpected for such 2D systems and completely absent in other layered materials, such as transition-metal dichalcogenides. By comparing different hybrid perovskites with the same inorganic layer but different organic interlayers, it is shown how the nature of the organic ligands controllably affects the out-of-plane exciton-photon coupling. Such vertical dipole coupling is particularly sought in those systems, e.g. plasmonic nanocavities, in which the direction of the field is usually orthogonal to the material sheet. Organic interlayers are shown to affect also the strong birefringence associated to the layered structure, which is exploited in this work to completely rotate the linear polarization degree in only few microns of propagation, akin to what happens in metamaterials.
description: 11 pages, 14 figures (included supporting info)
Quantum Properties of Topological Black Holes
Creators: name: Klemm, Dietmar
name: Vanzo, Luciano
Publisher: name: arXiv
Year: 1998
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We examine quantum properties of topological black holes which are asymptotically anti--de Sitter. First, massless scalar fields and Weyl spinors which propagate in the background of an anti--de Sitter black hole are considered in an exactly soluble two--dimensional toy model. The Boulware--, Unruh--, and Hartle--Hawking vacua are defined. The latter results to coincide with the Unruh vacuum due to the boundary conditions necessary in asymptotically adS spacetimes. We show that the Hartle--Hawking vacuum represents a thermal equilibrium state with the temperature found in the Euclidean formulation. The renormalized stress tensor for this quantum state is well--defined everywhere, for any genus and for all solutions which do not have an inner Cauchy horizon, whereas in this last case it diverges on the inner horizon. The four--dimensional case is finally considered, the equilibrium states are discussed and a luminosity formula for the black hole of any genus is obtained. Since spacelike infinity in anti--de Sitter space acts like a mirror, it is pointed out how this would imply information loss in gravitational collapse. The black hole's mass spectrum according to Bekenstein's view is discussed and compared to that provided by string theory.
description: 31 pages, one additional figure, enlarged discussion of the higher genus case, comment on the mass and new references added
Hyperolius montanus
Creators: name: Nečas, Tadeáš
name: Kielgast, Jos
name: Chinemerem, Ikechukwu G.
name: Rödel, Mark-Oliver
name: Dolinay, Matej
name: Gvoždík, Václav
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Amphibia
Anura
Hyperoliidae
Hyperolius
Hyperolius montanus

description: HYPEROLIUS MONTANUS GROUP
Hyperolius mitchelli clade of Conradie et al. (2018); Groups F and H of Ernst et al. (2021).
Contents (based on genetic data): H. mitchelli Loveridge 1953; H. montanus (Angel 1924); H. pictus Ahl, 1931; H. rubrovermiculatus SchiØtz, 1975; H. stictus Conradie, Verburgt, Portik, Ohler, Bwong and Lawson, 2018; H. substriatus Ahl, 1931 (Conradie et al. 2018, Portik et al. 2019, Bwong et al. 2020, Ernst et al. 2021).
Area of occurrence: East Africa from central Kenya in the North to central Mozambique in the South and eastern Zambia and south-eastern Democratic Republic of the Congo in the West.
Other potential members: Hyperolius atrigularis Laurent 1941 and H. kibarae Laurent, 1957 are possibly related to this group (SchiØtz 1999).
description: Published as part of Nečas, Tadeáš, Kielgast, Jos, Chinemerem, Ikechukwu G., Rödel, Mark-Oliver, Dolinay, Matej & Gvoždík, Václav, 2024, The phylogenetic position of Hyperolius sankuruensis (Anura: Hyperoliidae) reveals biogeographical affinity between the central Congo and West Africa, and illuminates the taxonomy of Hyperolius concolor, pp. 1-19 in Zoological Journal of the Linnean Society 202 on page 15, DOI: 10.1093/zoolinnean/zlae046, http://zenodo.org/record/14764284
Bound Dark Energy: towards understanding the nature of the Dark Energy
Creators: name: Almaraz, Erick
name: de la Macorra, Axel
Publisher: name: arXiv
Year: 2018
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a complete analysis of the observational constraints and cosmological implications of our Bound Dark Energy (BDE) model aimed to explain the late-time cosmic acceleration of the universe. BDE is derived from particle physics and corresponds to the lightest meson field $ϕ$ dynamically formed at low energies due to the strong gauge coupling constant. The evolution of the dark energy is determined by the scalar potential $V(ϕ)=Λ_c^{4+2/3}ϕ^{-2/3}$ arising from non-perturbative effects at a condensation scale $Λ_c$ and scale factor $a_c$, related each other by $a_cΛ_c/\mathrm{eV}=1.0934\times 10^{-4}$. We present the full background and perturbation evolution at a linear level. Using current observational data, we obtain the constraints $a_c=(2.48 \pm 0.02)\times10^{-6}$ and $Λ_c=(44.09 \pm 0.28) \textrm{ eV}$, which is in complete agreement with our theoretical prediction $Λ_c^{th}=34^{+16}_{-11}\textrm{ eV}$. The bounds on the equation of state today, the dark energy density and the expansion rate are $w_\mathrm{BDE 0}=-0.929\pm 0.007$, $Ω_\mathrm{BDE0}=0.696\pm0.007$ and $H_0=67.82\pm 0.05$ km s$^{-1}$Mpc, respectively. Even though the constraints on the six Planck base parameters are consistent at the 1$σ$ level between BDE and the concordance $Λ$CDM model, BDE improves the likelihood ratio by 2.1 of the Baryon Acoustic Oscillations (BAO) measurements with respect to $Λ$CDM and has an equivalent fit for type Ia supernovae and the Cosmic Microwave Background data. We present the constraints on the different cosmological parameters, and particularly we show the tension between BDE and $Λ$CDM in the BAO distance ratio $r_\mathrm{BAO}$ vs $H_\mathrm{0}$ and the growth index $γ$ at different redshifts, as well as the dark matter density at present time $Ω_ch^2$ vs $H_0$.
description: 21 pages, 17 figures
ЛИНГВИСТИКА И ФИЛОЛОГИЯ
Creators: name: Толегенова, Гулайим
Publisher: name: Zenodo
Year: 2024

description: Лингвистика, или языкознание, представляет собой науку, исследующую язык во всех его формах, охватывающую не один, а множество языков мира. Термин "филология" происходит от древнегреческого слова φιλολογία, что переводится как «любовь к слову». Филология занимается изучением культуры народа, которая находит свое выражение в его языке и литературных произведениях. Лингвистика и филология являются взаимосвязанными дисциплинами, что часто приводит к дебатам относительно их идентичности.
Influence of host matrices on krypton electron binding energies and KLL Auger transition energies
Creators: name: Inoyatov, A. Kh.
name: Perevoshchikov, L. L.
name: Kovalík, A.
name: Filosofov, D. V.
name: Yushkevich, Yu. V.
name: Ryšavý, M.
name: Lee, B. Q.
name: Kibédi, T.
name: Stuchbery, A. E.
name: Zhdanov, V. S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The low-energy electron spectra emitted in the radioactive decay of the $^{83}$Rb and $^{83}$Sr isotopes were measured with a combined electrostatic electron spectrometer. Radioactive sources used were prepared by ion implantation of $^{83}$Sr into a high purity polycrystalline platinum foil at 30 keV and by vacuum-evaporation deposition of $^{83}$ Rb on the same type of foil. From the measured conversion electron spectra, the electron binding energies (referenced to the Fermi level) for the K, L$_1$ , L$_2$ , L$_3$ , M$_1$ , M$_2$, and M$_3$ shell/subshells of krypton in the platinum host were determined to be 14 316.4(12), 1 914.3(9), 1 720.3(9), 1 667.6(9), 281.5(9), 209.6(13), and 201.2(15) eV, respectively, and those for the evaporated layer were observed to be lower by 0.7(1) eV. For both host matrices, values of 2.3(2), 4.6(2), 1.7(2), 1.3(2), and 3.2(3) eV were obtained for the krypton K, L$_1$ , L$_2$ , L$_3$ , and M$_1$ natural atomic level widths, respectively. The absolute energies of 10 838.5(9) and 10 839.5(10) eV were measured for the KL$_2$L$_3$ ($^{1}$D$_2$) Auger transition in krypton implanted in Pt and generated in the evaporated rubidium layer, respectively. A value of 601.0(8) eV was measured for the energy difference of the KL$_2$L$_3$ ($^{1}$D$_2$) transitions in Rb and Kr in the Pt host. Multiconfiguration Dirac-Fock calculations of the krypton KLL transition energies and intensities were also performed.
Enhancing science education in the elementary schools
Creators: name: Cole, Milton W.
name: Zembal-Saul, Carla
Publisher: name: arXiv
Year: 2002
Subjects: subject: Physics Education (physics.ed-ph)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: This article describes some collaborative activities of the authors, aimed at improving science education in elementary schools. These include curriculum enhancement, development of new apparatus (a wind tunnel), science-education web site contributions and production of a film about the physics of flight. The output of these projects is intended to be generally accessible or reproducible.
description: To appear in the American Journal of Physics, 3 pages
Monogamy properties of qubit systems
Creators: name: Zhu, Xue-Na
name: Fei, Shao-Ming
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate monogamy relations related to quantum entanglement for $n-$qubit quantum systems. General monogamy inequalities are presented to the $β$th $(β\in(0,2))$ power of concurrence, negativity and the convex-roof extended negativity, as well as the $β$th $(β\in(0,\sqrt{2}))$ power of entanglement of formation. These monogamy relations are complementary to the existing ones with different regions of parameter $β$. In additions, new monogamy relations are also derived which include the existing ones as special cases.
description: 13pages, 2 figures
Neobythitinae Radcliffe 1913
Creators: name: Laan, Richard Van Der
name: Eschmeyer, William N.
name: Fricke, Ronald
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Ophidiiformes
Ophidiidae

description: Subfamily Neobythitinae Radcliffe 1913
Name in prevailing recent practice
 Sirembinae Gill 1863h:253 [ref. 1688] (subfamily) Sirembo
 Bathyonidae Jordan 1905:540 [ref. 31955] (family) Bathyonus
 Neobythitinae Radcliffe 1913:136 [ref. 3579] (subfamily) Neobythites [Neobythitinae used as valid by: Cohen & Nielsen 1978 [ref. 881], Nelson 1984 [ref. 13596], McAllister 1990 [ref. 14674], Nelson 1994 [ref. 26204], Grove & Lavenberg 1997 [ref. 24023], Eschmeyer 1998 [ref. 23416], Nielsen, Cohen, Markle & Robins 1999 [ref. 24448], Nelson 2006 [ref. 32486], Li & Zhang 2011 [ref. 31777]]
description: Published as part of Laan, Richard Van Der, Eschmeyer, William N. & Fricke, Ronald, 2014, Family-group names of Recent fishes, pp. 1-230 in Zootaxa 3882 (2) on page 68, DOI: 10.11646/zootaxa.3882.1.1, http://zenodo.org/record/7047777
Melanotaeniidae Gill 1894
Creators: name: Laan, Richard Van Der
name: Eschmeyer, William N.
name: Fricke, Ronald
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Atheriniformes
Melanotaeniidae

description: Family Melanotaeniidae Gill 1894
Name in prevailing usage
 Zanteclidae Castelnau 1873:88 [ref. 758] (family) Zantecla [never used as valid after 1899, Article 23.9.1.1]
 Neoatherinidae Castelnau 1875:32 [ref. 768] (family) Neoatherina [never used as valid after 1899, Article 23.9.1.1]
 Melanotaeniinae Gill 1894a:708 [ref. 1738] (subfamily) Melanotaenia [family name sometimes seen as Melanotaenidae; Melanotaeniidae used as valid by: Jordan 1923 [ref. 2421], Duncker & Mohr 1926 [ref. 15585], McAllister 1968 [ref. 26854], Lindberg 1971 [ref. 27211], Nelson 1976 [ref. 32838], Shiino 1976, Allen 1978 [ref. 8855], Allen & Kailola 1979 [ref. 8854], Allen 1980 [ref. 99], Allen & Cross 1980 [ref. 8761], Allen & Moore 1981 [ref. 8633], Allen & Ivantsoff 1982 [ref. 8519], Allen & Sarti 1983 [ref. 5354], Nelson 1984 [ref. 13596], Derijst 1989 [ref. 12460], Paxton et al. 1989 [ref. 12442], Sterba 1990, Crowley & Ivantsoff 1991 [ref. 19166], Aarn & Ivantsoff 1996 [ref. 22302], Allen & Renyaan 1996 [ref. 22190], Price 1997 [ref. 23466], Eschmeyer 1998 [ref. 23416], McGuigan 2001 [ref. 25582], Allen, Midgley & Allen 2002 [ref. 25930], Page, Sharma & Hughes 2004 [ref. 27702], Hoese et al. 2006, Nelson 2006 [ref. 32486], Allen & Unmack 2008 [ref. 29477], Allen & Hadiaty 2013 [ref. 32792], Martin & Barclay 2013 [ref. 32819]; so the family-group name Melanotaeniinae Gill 1894 is valid according to Article 23.9.1]
 Rhombatractidae Ogilby 1896:119 [ref. 32616] (family) Rhombatractus [name dismissed op page 131–133, not available]
 Iriatherininae Aarn & Ivantsoff 1997:144 [ref. 23322] (subfamily) Iriatherina
description: Published as part of Laan, Richard Van Der, Eschmeyer, William N. & Fricke, Ronald, 2014, Family-group names of Recent fishes, pp. 1-230 in Zootaxa 3882 (2) on page 72, DOI: 10.11646/zootaxa.3882.1.1, http://zenodo.org/record/7047777
Spin dynamics of the spin-Peierls compound CuGeO_3 under magnetic field
Creators: name: Poilblanc, D.
name: Riera, J.
name: Hayward, C. A.
name: Berthier, C.
name: Horvatic, M.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The magnetic field--driven transition in the spin-Peierls system CuGeO_3 associated with the closing of the spin gap is investigated numerically. The field dependence of the spin dynamical structure factor (seen by inelastic neutron scattering) and of the momentum dependent static susceptibility are calculated. In the dimerized phase (H
description: 4 pages, LaTeX, postscript figures included