cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Profile-Based Ad Hoc Social Networking Using Wi-Fi Direct on the Top of Android
Creators: name: Aneja, Nagender
name: Gambhir, Sapna
Publisher: name: arXiv
Year: 2018
Subjects: subject: Social and Information Networks (cs.SI)
subject: Cryptography and Security (cs.CR)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Ad-hoc Social Networks have become popular to support novel applications related to location-based mobile services that are of great importance to users and businesses. Unlike traditional social services using a centralized server to fetch location, ad-hoc social network services support infrastructure less real-time social networking. It allows users to collaborate and share views anytime anywhere. However, current ad-hoc social network applications are either not available without rooting the mobile phones or don't filter the nearby users based on common interests without a centralized server. This paper presents an architecture and implementation of social networks on commercially available mobile devices that allow broadcasting name and a limited number of keywords representing users' interests without any connection in a nearby region to facilitate matching of interests. The broadcasting region creates a digital aura and is limited by WiFi region that is around 200 meters. The application connects users to form a group based on their profile or interests using peer-to-peer communication mode without using any centralized networking or profile matching infrastructure. The peer-to-peer group can be used for private communication when the network is not available.
Metric-affine Gravity and Inflation
Creators: name: Shimada, Keigo
name: Aoki, Katsuki
name: Maeda, Kei-ichi
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We classify the metric-affine theories of gravitation, in which the metric and the connections are treated as independent variables, by use of several constraints on the connections. Assuming the Einstein-Hilbert action, we find that the equations for the distortion tensor (torsion and non-metricity) become algebraic, which means that those variables are not dynamical. As a result, we can rewrite the basic equations in the form of Riemannian geometry. Although all classified models recover the Einstein gravity in the Palatini formalism (in which we assume there is no coupling between matter and the connections), but when matter field couples to the connections, the effective Einstein equations include an additional hyper energy-momentum tensor obtained from the distortion tensor. Assuming a simple extension of a minimally coupled scalar field in metric-affine gravity, we analyze an inflationary scenario. Even if we adopt a chaotic inflation potential, certain parameters could satisfy observational constraints. Furthermore, we find that a simple form of Galileon scalar field in metric-affine could cause G-inflation.
description: 18 pages, 6 figures, comments welcome. v2: references added
vegetation and sediment data from Establishing rates of carbon sequestration in mangroves from an earthquake uplift event
Creators: name: Salmo, Severino G.
name: Malapit, Vanessa
name: Garcia, Maria Carmela A.
name: Pagkalinawan, Homer M.
Publisher: name: The Royal Society
Year: 2019
Subjects: subject: Environmental Science
subject: Ecology
subject: FOS: Biological sciences

description: We assessed the carbon stocks (CS) in mangroves that developed after a magnitude 7.1 earthquake in Silonay, Oriental Mindoro, south Luzon, The Philippines in November 1994. The earthquake resulted in a 50 cm uplift of sediment that provided new habitat within the upper intertidal zone which mangroves colonized (from less than 2 ha pre-earthquake to the current 45 ha, 23 years post-earthquake). The site provided an opportunity for a novel assessment of the rate of carbon sequestration in recently established mangroves. The carbon stock was measured in above-ground, below-ground and sediment compartments over a seaward to landward transect. Results showed a mean carbon stock of 549 ± 30 Mg C ha−1 (of which 13% was from the above-ground biomass, 5% from the below-ground biomass and 82% from the sediments). There was high carbon sequestration at a 40 cm depth that can be inferred attributable to the developed mangroves. The calculated rate of C sequestration (over 23 years post-earthquake) was 10.2 ± 0.7 Mg C ha−1 yr−1 and is comparable to rates reported from mangroves recovering from forest clearing. The rates we present here from newly developed mangroves contributes to calibrating estimates of total CS from restored mangroves (of different developmental stages) and in mangroves that are affected by disturbances.
CP Violation in Quasi-inclusive $B\to K^{(*)} X$ Decays
Creators: name: Browder, T. E.
name: Datta, A.
name: He, X. -G.
name: Pakvasa, S.
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We consider the possibility of observing CP violation in quasi-inclusive decays of the type $B^-\to K^- X$, $B^-\to K^{*-} X$, $\bar B^0\to K^- X$ and $\bar B^0\to K^{*-} X$, where $X$ does not contain strange quarks. We present estimates of rates and asymmetries for these decays in the Standard Model and comment on the experimental feasibility of observing CP violation in these decays at future $B$ factories. We find the rate asymmetries can be quite sizeable.
description: 28 pages, REVTEX format with 20 figures. Updated acknowledgments. Corrected typographical errors and updated the bibliography. To appear in Physical Review D
On the number of distinct exponents in the prime factorization of an integer
Creators: name: Sanna, Carlo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11N25 (Primary) 11N37, 11N64 (Secondary)

description: Let $f(n)$ be the number of distinct exponents in the prime factorization of the natural number $n$. We prove some results about the distribution of $f(n)$. In particular, for any positive integer $k$, we obtain that $$ \#\{n \leq x : f(n) = k\} \sim A_k x $$ and $$ \#\{n \leq x : f(n) = ω(n) - k\} \sim \frac{B x (\log \log x)^k}{k! \log x} , $$ as $x \to +\infty$, where $ω(n)$ is the number of prime factors of $n$ and $A_k, B > 0$ are some explicit constants. The latter asymptotic extends a result of Aktaş and Ram Murty about numbers having mutually distinct exponents in their prime factorization.
Dr Cinik
Creators: name: Dr Cinik
Publisher: name: figshare
Year: 2019
Subjects: subject: 150402 Hospitality Management
subject: FOS: Economics and business

description: On the off chance that you are considering hair transplanting, don’t disregard the JCI-USA affirmed International Dr. Cinik's Clinic, lashed with the Modern conveniences.
Omyomymar Schauff 1983
Creators: name: Huber, John T.
name: Read, Jennifer D.
name: Triapitsyn, Serguei V.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mymaridae
Omyomymar

description: OMYOMYMAR Schauff, 1983
(Figs 191–203)
 Omyomymar Schauff, 1983: 544. Type species: Paranaphoidea silvana Ogloblin, 1935, by original designation. See Huber et al. (2020) for generic synonyms and their type species.
 Omyomymar (Kyushumymar) Triapitsyn, 2021b: 89. Type species: Omyomymar (Kyushumymar) yamagishii Triapitsyn, 2021, by original designation.
 Diagnosis. Face with faint subantennal sulci; ocelli not delimited by stemmaticum; mandibles minute stubs with apices not extending to each other when closed (Fig. 192); female antenna with clava 2-segmented, the apical segment usually with a nipple-like projection (Fig. 196); frenum partly longitudinally divided; ovipositor and sheaths not extending forward under mesosoma but usually distinctly exserted posterior to apex of gaster (Fig. 201). Male head with eye relatively small and gena wide (Fig. 194); scape with inner surface with a few to many spine-like setae (Figs 197, 198).
 Discussion. Omyomymar belongs to the Anagrus group of genera. In the Afrotropical region the Anagrus group also includes Allanagrus, Anagrus, Dorya, Paranaphoidea and Schizophragma. Among these Omyomymar is the only genus with the ovipositor usually strongly exserted posteriorly (but not anteriorly ventral to mesosoma) and the head strongly sexually dimorphic.
 Afrotropical hosts. Unknown.
 Distribution. No named species in the Afrotropical region. Specimens examined are from Cameroon, Gabon, Guinea, Ivory Coast, Kenya, Nigeria, Seychelles, South Africa, Uganda (CAS, CNC, UCRC); all belong to the nominal subgenus.
 Important reference. Schauff (1983).
description: Published as part of Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2021, Illustrated key to the genera and catalogue of Mymaridae (Hymenoptera) in the Afrotropical region, pp. 1-166 in Zootaxa 5036 (1) on page 39, DOI: 10.11646/zootaxa.5036.1.1, http://zenodo.org/record/5502952
Dynamics versus replicas in the random field Ising model
Creators: name: Brézin, E.
name: De Dominicis, C.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: In a previous article we have shown, within the replica formalism, that the conventional picture of the random field Ising model breaks down, by the effect of singularities in the interactions between fields involving several replicas, below dimension eight. In the zero-replica limit several coupling constants have thus to be considered, instead of just one. As a result we had found that there is no stable fixed point in the vicinity of dimension six. It is natural to reconsider the problem in a dynamical framework, which does not require replicas, although the equilibrium properties should be recovered in the large time limit. Singularities in the zero-replica limit are a priori not visible in a dynamical picture. In this note we show that in fact new interactions are also generated in the stochastic approach. Similarly these interactions are found to be singular below dimension eight. These critical singularities require the introduction of a time origin $t_0$ at which initial data are given. The dynamical properties are thus dependent upon the waiting time. It is shown here that one can indeed find a complete correspondence between the equilibrium singularities in the $n=0$ limit, and the singularities in the dynamics when the initial time $t_0$ goes to minus infinity, with $n$ replaced by $-\frac{1}{t_0}$. There is thus complete coherence between the two approaches.
description: 8 pages, latex, no figure
Fundamental Studies of SiN Interfacial Defects for Quantum Photonics
Creators: name: Martin, Zachariah Olson
Publisher: name: Purdue University Graduate School
Year: 2024
Subjects: classificationCode: 400807
subject: Engineering electromagnetics

description: Quantum photonics is one of the leading platforms to realize quantum information technologies. Quantum emitters embedded in host materials which can readily form photonic circuitry elements have received significant research interest in recent years for on-chip quantum information processing applications. In this work, we report on the discovery of bright, stable, and linearly polarized quantum emitters in SiN films with room temperature single photon generation. We suggest that the emission originates from a specific defect center in SiN because of the narrow wavelength distribution of the observed luminescence peak.We further probe these emitters’ fundamental photophysical properties through measurements of optical transition wavelengths, linewidths, and photon antibunching as a function of temperature. Important insight into the potential for lifetime-limited linewidths is provided through measurements of inhomogeneous and temperature-dependent broadening of the zero-phonon lines. At 4.2K, spectral diffusion was found to be the main broadening mechanism, while spectroscopy time series revealed zero-phonon lines with instrument-limited linewidths.Along with the optical properties of the quantum emitters, we study their formation mechanisms by investigating the effects of sample composition and thermal annealing parameters. From these measurements, we gain critical insight into the fundamental nature of the quantum emitters in SiN, as well as the dependence of their photophysical properties on the changes in the host material. Additionally, we explore alternative SiN fabrication approaches and the optical properties of the SiN films developed with these techniques. We then investigate quantum emitter formation and hypothesize why the optical properties of the defects in each type of film differ.Finally, we begin preliminary investigations into the possible existence of near-infrared (NIR) emitting defects in SiN, as well as single-photon electroluminescence from thin SiN-on-silica films embedded in p-n heterojunctions.The single-photon emitters in SiN we have studied extensively in this work have the potential to enable scalable and low-loss integration of quantum light sources with a mature on-chip photonics platform.
Commensurate and Incommensurate Structure of the Neutron Cross Section in LaSrCuO and YBaCuO
Creators: name: Kao, Ying-Jer
name: Si, Qimiao
name: Levin, K.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the evolution of the d-wave neutron cross-section with variable frequency ωand fixed T (below and above Tc) in two different cuprate families. The evolution from incommensurate to commensurate to incommensurate peaks is rather generic within an RPA-like scheme. This behavior seems to be in reasonable accord with experiments, and may help distinguish between this and the "stripe" scenario.
description: 2 pages; submitted to Proceedings of M2S-HTSC-VI
Simulation of a cusped bubble rising in a viscoelastic fluid with a new numerical method
Creators: name: Wagner, A. J.
name: Giraud, L.
name: Scott, C. E.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We developed a new lattice Boltzmann method that allows the simulation of two-phase flow of viscoelastic liquid mixtures. We used this new method to simulate a bubble rising in a viscoelastic fluid and were able to reproduce the experimentally observed cusp at the trailing end of the bubble.
description: 4 pages, 3 Figures
Effective action for scalar fields in two-dimensional gravity
Creators: name: Katanaev, M. O.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a general two-dimensional gravity model minimally or nonminimally coupled to a scalar field. The canonical form of the model is elucidated, and a general solution of the equations of motion in the massless case is reviewed. In the presence of a scalar field all geometric fields (zweibein and Lorentz connection) are excluded from the model by solving exactly their Hamiltonian equations of motion. In this way the effective equations of motion and the corresponding effective action for a scalar field are obtained. It is written in a Minkowskian space-time and does not include any geometric variables. The effective action arises as a boundary term and is nontrivial both for open and closed universes. The reason is that unphysical degrees of freedom cannot be compactly supported because they must satisfy the constraint equation. As an example we consider spherically reduced gravity minimally coupled to a massless scalar field. The effective action is used to reproduce the Fisher and Roberts solutions.
Piezoelectric energy harvesting from human movement: exploiting foot swing excitations
Creators: name: Dr Iman Izadgoshasb
Publisher: name: figshare
Year: 2019
Subjects: subject: 90608 Renewable Power and Energy Systems Engineering (excl. Solar Cells)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Piezoelectric materials are capable of converting energy from mechanical vibration to electrical energy. Piezoelectricity stands for pressure electricity and is a property of special crystalline materials including quartz, Rochelle salt, tourmaline, and barium titanate 1 .Piezoelectricity is generated when dielectric materials that have developed a polarization are subjected to mechanical strain deformation. The mechanical strain produces a biasing forcer arrangement of atoms there by creating polarization and thus an electric field 2-3. Conversely, when a piezoelectric material is subjected to an electric field, it will cause a mechanical deformation with in its structure. In both conditions, changing the direction of the applied force, (mechanical or electrical), will generate a change in the direction of the effect 2-3. Harvesting mechanical energy from human motion is an attractive approach for obtaining clean and sustainable electric energy to power wearable sensors, which are widely used for health monitoring, activity recognition, gait analysis and so on. This research studies a piezoelectric energy harvester to convert mechanical energy to electricity using human motions. The harvester exploits walking swing and shock excitations and could be embedded to the shoe. Series of magnets can amplify the foot acceleration in swing phase. The harvester contains a cantilever beam that can vibrate based on foot acceleration and magnetic excitation. Two MFC materials are attached to the beam in parallel to increase the current. The maximum voltage of 50 V AC can be generated in resonance frequency that it could be converted to the DC by using bridge circuit to save in the capacitors or batteries.
Archival materials: a practical definition
Creators: name: Van Garderen, Peter
Publisher: name: Zenodo
Year: 2007

description: This working paper provides a practical definition of archival materials for the purpose of software engineering. Archival science scholars split hairs about the definition of archives and records. Most of these academic definitions are aspirational. However, they do not reflect the heterogeneous and eclectic nature of real-world archival holdings. Software engineering requires precise definitions of the entities within its domain. This paper attempts to provide a practical definition for the archival materials managed with archives management software.
Emergence of structural anisotropy in Optical Glasses treated to support Second Harmonic Generation
Creators: name: Cabrillo, C.
name: Cuello, G. J.
name: Garcia-Fernandez, P.
name: Bermejo, F. J.
name: Pruneri, V.
name: Kazansky, P. G.
name: Bennington, S. M.
name: Howells, W. S.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Structural alterations in v-SiO2 induced by "thermal poling", a treatment which makes the glass able to double the frequency of an impinging infrared light, are revealed by neutron diffraction as a breakdown of the macroscopic isotropy. This leads to concomitant changes in the vibrational density of states measured by inelastic neutron scattering. The observations are found to be consistent with the emergence of partial ordering within the glassy matrix along the direction of an electrostatic field applied during the poling treatment.
description: LaTeX document, RevTex style, 6 pp., 2 figures in EPS format
Indications of Spin-Charge Separation in the 2D Extended t-J Model
Creators: name: Martins, George B.
name: Eder, Robert
name: Dagotto, Elbio
Publisher: name: arXiv
Year: 1999
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The 2D extended $\rm t-J$ model is studied computationally in a broad region of parameter space, motivated by recent photoemission experiments for the undoped cuprate $\rm Ca_2 Cu O_2 Cl_2$ (F. Ronning et al., Science {\bf 282}, 2067 (1998)). The one-hole ground state is shown to develop robust antiferromagnetic (AF) correlations between spins separated by the mobile hole (i.e. across the hole). This effect tends to decouple charge from spin, and the quasiparticle weight becomes negligible, particularly at momenta $(0,π)-(π,0)$. Studies with more holes show precursors of metallic stripe formation, with holes sharing their individual spin arrangements, and AF-correlations generated across the stripe.
description: 4 pages, Latex, 4 PS figures, added references, accepted in PRB as Rapid Comm
Robust Transmissions in Wireless Powered Multi-Relay Networks with Chance Interference Constraints
Creators: name: Xu, Jing
name: Zou, Yuze
name: Gong, Shimin
name: Gao, Lin
name: Niyato, Dusit
name: Cheng, Wenqing
Publisher: name: arXiv
Year: 2018
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we consider a wireless powered multi-relay network in which a multi-antenna hybrid access point underlaying a cellular system transmits information to distant receivers. Multiple relays capable of energy harvesting are deployed in the network to assist the information transmission. The hybrid access point can wirelessly supply energy to the relays, achieving multi-user gains from signal and energy cooperation. We propose a joint optimization for signal beamforming of the hybrid access point as well as wireless energy harvesting and collaborative beamforming strategies of the relays. The objective is to maximize network throughput subject to probabilistic interference constraints at the cellular user equipment. We formulate the throughput maximization with both the time-switching and power-splitting schemes, which impose very different couplings between the operating parameters for wireless power and information transfer. Although the optimization problems are inherently non-convex, they share similar structural properties that can be leveraged for efficient algorithm design. In particular, by exploiting monotonicity in the throughput, we maximize it iteratively via customized polyblock approximation with reduced complexity. The numerical results show that the proposed algorithms can achieve close to optimal performance in terms of the energy efficiency and throughput.
description: 14 pages, 8 figures
Molecular mechanisms controlling μ-opioid receptor activation
Creators: name: ARISBEL BATISTA GONDIN
Publisher: name: Monash University
Year: 2020
Subjects: subject: 111504 Pharmaceutical Sciences
subject: FOS: Clinical medicine
subject: Pharmacology

description: This thesis has advanced the field of opioid receptors, which is a critical research area with much public attention due to the current “opioid epidemic” within western societies. This work has shown that synthetic forms of the endogenous opioids cause very distinct receptor regulation and movement within the cell surface, compared to the prototypical analgesic, morphine. Moreover, this work provides evidence that the efficacy of new generation opioid drugs, widely publicised to be biased ligands, is actually due to weak partial agonist activity. This is critical information, as some of these new drugs are currently being approved by the FDA.
Ooctonus Haliday 1833
Creators: name: Huber, John T.
name: Read, Jennifer D.
name: Triapitsyn, Serguei V.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mymaridae
Ooctonus

description: OOCTONUS Haliday, 1833
(Figs 204–209)
 Ooctonus Haliday, 1833a: 268, 1833b: 343. Type species: Ooctonus insignis Haliday, 1833, by subsequent designation by Westwood, 1839: 78. See Huber et al. (2020) for generic synonyms and their type species.
 Diagnosis. Face without subantennal sulci (Fig. 204); female antenna with funicle 8-segmented (Fig. 205); pronotum entire (Fig. 207); propodeum with diamond-like pattern of carinae, the incomplete median carina, costulae and plicae, defining a central pentagonal areole and, sublaterally, several (usually 4) submedian areoles (Fig. 207); fore wing with hypochaeta next to proximal macrochaeta (Fig. 206); petiole distinctly longer than wide; gt 1 in lateral view usually as long as remaining terga together (Fig. 209).
 Discussion. Ooctonus belongs to the Ooctonus group of genera. In the Afrotropical region it is the only genus in the group. Although Ooctonus was traditionally placed near the Gonatocerus group of genera it superficially resembles several genera in the Polynema group except for the obvious difference in number of funicle and tarsal segments. The position of the hypochaeta, close to the proximal macrochaeta, is more similar to members of the Polynema group than to members of the Gonatocerus group.
 Afrotropical hosts. Unknown.
 Important reference. Huber et al. (2010).
description: Published as part of Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2021, Illustrated key to the genera and catalogue of Mymaridae (Hymenoptera) in the Afrotropical region, pp. 1-166 in Zootaxa 5036 (1) on page 39, DOI: 10.11646/zootaxa.5036.1.1, http://zenodo.org/record/5502952
Gravitation as a Super SL(2,C) Gauge Theory
Creators: name: Tung, Roh S.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a gauge theory of the super SL(2,C) group. The gauge potential is a connection of the Super SL(2,C) group. A MacDowell-Mansouri type of action is proposed where the action is quadratic in the Super SL(2,C) curvature and depends purely on gauge connection. By breaking the symmetry of the Super SL(2,C) topological gauge theory to SL(2,C), a metric is naturally defined.
description: 4 pages, Proceedings of the 9th Marcel Grossmann Meeting, Rome, 2-8 July, 2000
Automated testing module : For Mediburn 30 power distribution relay board
Creators: name: Sweet, Jack
Publisher: name: Unknown
Year: 2013

description: The desired outcome of this senior design project was to design and build an automated circuit
board testing module for use at Integrity Calibration Services, Inc. The module is to be used to
test and troubleshoot the Medibum 30 circuit board. This board is used in an application for a
company named Elastec. The Mediburn 30 circuit board is responsible for various types of power
distribution in a medical waste incinerator. Custom analog circuiti-y designed includes a system
with an input of 240 VAC and output of 5 VDC and a system with a 24 VAC input and 5 VDC
output. An LCD screen is used to communicate with the module operator. The module is capable
of triggering the circuits located on the Mediburn 30 board, verifying that the output is correct,
and notifying the user that the circuit has passed inspection before cycling to the next circuit. The
module is also capable of sensing incorrect output of due to assembly eiror in the construction
process of the Mediburn 30. The user is then notified of the circuit failing inspection. The test is
then halted to prevent destruction of components.
A numerical method for detecting incommensurate correlations in the Heisenberg zigzag ladder
Creators: name: Aligia, A. A.
name: Batista, C. D.
name: Essler, F. H. L.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study two Heisenberg spin-1/2 chains coupled by a frustrating ``zigzag'' interaction. We are particularly interested in the regime of weak interchain coupling, which is difficult to analyse by either numerical or analytical methods. Previous density matrix renormalisation group (DMRG) studies of the isotropic model with open boundary conditions and sizeable interchain coupling have established the presence of incommensurate correlations and of a spectral gap. By using twisted boundary conditions with arbitrary twist angle, we are able to determine the incommensurabilities both in the isotropic case and in the presence of an exchange anisotropy by means of exact diagonalisation of relatively short finite chains of up to 24 sites. Using twisted boundary conditions results in a very smooth dependence of the incommensurabilities on system size, which makes the extrapolation to infinite systems significantly easier than for open or periodic chains.
description: 6 pages, including 7 figures
Quasi-Local "Conserved Quantities"
Creators: name: Tung, Roh S.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using the Noether Charge formulation, we study a perturbation of the conserved gravitating system. By requiring the boundary term in the variation of the Hamiltonian to depend only on the symplectic structure, we propose a general prescription for defining quasi-local ``conserved quantities'' (i.e. in the situation when the gravitating system has a non-vanishing energy flux). Applications include energy-momentum and angular momentum at spatial and null infinity, asymptotically anti-deSitter spacetimes, and thermodynamics of the isolated horizons.
description: 4 pages, contribution to the proceedings of the 9th Marcel Grossmann Meeting; typos corrected
Modified parton distributions and the HERA high-Q^2 anomaly
Creators: name: Babu, K. S.
name: Kolda, Christopher
name: March-Russell, John
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A recent proposal seeks to explain the anomaly in the HERA high-Q^2 neutral current e^+p data by modifying the parton distribution functions at moderate-to-high-x and large Q^2. We investigate the consequences of this proposal for the HERA high-Q^2 data itself, in the neutral current e^-p channel and especially in the charged current e^\pm p channels. We find that there are striking signatures in the charged current which already serve to rule out many possibilities, including the (symmetric) intrinsic charm hypothesis. For those not ruled out, interesting signals are predicted in e^-p scattering.
description: 10 pages Latex with 1 EPSF figure
Palaeoneura Waterhouse 1915
Creators: name: Huber, John T.
name: Read, Jennifer D.
name: Triapitsyn, Serguei V.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mymaridae
Palaeoneura

description: PALAEONEURA Waterhouse, 1915
(Figs 210–216)
 Palaeoneura Waterhouse, 1915: 537. Type species: Palaeoneura interrupta Waterhouse, 1915, by subsequent designation by Gahan & Fagan, 1923: 103. See Huber et al. (2020) for generic synonyms and their type species.
 Diagnosis. Torulus without a small pit next to inner margin (Fig. 210a); propleura abutting anterior to prosternum (Fig. 215); fore wing with slight to distinct narrowing beyond apex of venation, the posterior margin of wing thus slightly to distinctly sinuate with a correspondingly slight to distinct lobe (Fig. 212); petiole attached posteriorly to gastral tergum.
 Discussion. Palaeoneura belongs to the Polynema group of genera as defined by Triapitsyn & Berezovskiy (2007). In the Afrotropical region this group also includes Acmopolynema, Ganomymar, Mymar, Mymarilla, Polynema and Stephanodes. Palaeoneura is distinguished from P. (Polynema) by the propleura abutting medially, sometimes only narrowly, anterior to prosternum whereas in P. (Polynema) and P. (Dorypolynema) the propleura do not abut. Palaeoneura is distinguished from Polynema (Doriclytus) by not having pits between the toruli whereas P. (Doriclytus) has pits between the toruli. In both Palaeoneura and Polynema (Doriclytus) the propleura abut anteriorly.
 Afrotropical hosts. Hemiptera. The two published records (one extralimital) from Lepidoptera are almost certainly incorrect because Mymaridae are not reliably known to parasitize members of that order.
 Important references. Huber (2003), Triapitsyn & Berezovskiy (2007).
description: Published as part of Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2021, Illustrated key to the genera and catalogue of Mymaridae (Hymenoptera) in the Afrotropical region, pp. 1-166 in Zootaxa 5036 (1) on page 40, DOI: 10.11646/zootaxa.5036.1.1, http://zenodo.org/record/5502952
Thermally activated reorientation of di-interstitial defects in silicon
Creators: name: Kim, J.
name: Kirchhoff, F.
name: Aulbur, W. G.
name: Wilkins, J. W.
name: Khan, F. S.
name: Kresse, G.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We propose a di-interstitial model for the P6 center commonly observed in ion implanted silicon. The di-interstitial structure and transition paths between different defect orientations can explain the thermally activated transition of the P6 center from low-temperature C1h to room-temperature D2d symmetry. The activation energy for the defect reorientation determined by ab initio calculations is 0.5 eV in agreement with the experiment. Our di-interstitial model establishes a link between point defects and extended defects, di-interstitials providing the nuclei for the growth.
description: 12 pages, REVTeX, Four figures, submitted to Phys. Rev. Lett
Piezoelectric energy harvesting from human walking
Creators: name: Dr Iman Izadgoshasb
Publisher: name: figshare
Year: 2019
Subjects: subject: 90608 Renewable Power and Energy Systems Engineering (excl. Solar Cells)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 91305 Energy Generation, Conversion and Storage Engineering
subject: FOS: Mechanical engineering
subject: 90607 Power and Energy Systems Engineering (excl. Renewable Power)

description: Piezoelectric materials are capable of converting energy from mechanical vibration to electrical energy. Piezoelectricity is generated when dielectric materials that have developed a polarization are subjected to mechanical strain deformation. Conversely, when a piezoelectric material is subjected to an electric field, it will cause a mechanical deformation within its structure. Harvesting mechanical energy from human motion is an attractive approach for obtaining clean and sustainable electric energy to power wearable sensors, which are widely used for health monitoring, activity recognition, gait analysis and so on. This research studies the capability of piezoelectric energy harvester in converting mechanical energy of human motions to electricity. The harvester exploits walking swing and shock excitations and could be embedded to the shoe. Series of magnets can amplify the foot acceleration in swing phase. The harvester contains a cantilever beam that can vibrate based on foot acceleration and magnetic excitation. The MFC piezoelectric material is attached to the cantilever beam in this study. The maximum voltage of 60V AC and continuous average voltage of 25V AC can be generated at resonance frequency. It could be converted to DC using a bridge circuit to save in the capacitors or batteries. Experimental results from human walking and shaker show an agreement with theoretical modeling. Results show that using frequency up-conversion mechanism the amount of acceleration and voltage are increased and harvester is able to scavenge energy continuously during human walking.
Paranaphoidea Girault 1913
Creators: name: Huber, John T.
name: Read, Jennifer D.
name: Triapitsyn, Serguei V.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mymaridae
Paranaphoidea

description: PARANAPHOIDEA Girault, 1913
(Figs 217–221)
 Paranaphoidea Girault, 1913: 115. Type species: Paranaphoidea egregia Girault, 1913, by original designation.
 Idiocentrus Gahan, 1927: 35. Type species: Idiocentrus mirus Gahan, 1927, by original designation. Synonymy by Lin et al., 2007: 43.
 Diagnosis. Face with subantennal sulci (Fig. 217); ocelli not delimited by stemmaticum (Fig. 221); back of head with curved transverse groove separating occiput from gena/postgena (Fig. 220); female antenna with clava 3-segmented (Fig. 218) or 2-segmented (Fig. 221); frenum divided medially by longitudinal suture; ovipositor extending anteriorly under mesosoma anterior to level of head (Fig. 221).
 Discussion. Paranaphoidea belongs to the Anagrus group of genera. In the Afrotropical region the Anagrus group also includes Allanagrus, Anagrus, Dorya, Omyomymar and Schizophragma. Paranaphoidea is distinguished from the other genera in the group by the ovipositor and sheaths in a gastral sac projecting anteriorly under the mesosoma as far as or beyond the level of the head.
 Afrotropical hosts. Unknown.
 Important reference. Huber & Triapitsyn (2017).
description: Published as part of Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2021, Illustrated key to the genera and catalogue of Mymaridae (Hymenoptera) in the Afrotropical region, pp. 1-166 in Zootaxa 5036 (1) on pages 41-42, DOI: 10.11646/zootaxa.5036.1.1, http://zenodo.org/record/5502952
IATUL 11 Research Impact Things - Lesson plans
Creators: name: Glasgow, Fiona
name: Lubcke, Antje
Publisher: name: figshare
Year: 2021
Subjects: subject: 80706 Librarianship
subject: FOS: Media and communications
subject: Library and Information Studies

description: These are the work of Fiona Glasgow, and adapted upon an earlier series created with Antje Lubcke. They reflect the personal opinions of the author, and are not guaranteed to be 100% factual or free of biases. Please edit with the most up-to-date information before use. This is a fast-moving field and information or resources are likely to change.
MADANIYATLARARO NIZOLAR VA ULARNING SIYOSIY OQIBATLARI
Creators: name: Yaxshiboyeva, Nozima
Publisher: name: Zenodo
Year: 2025

description: Ushbu maqolada madaniyatlararo nizolar va ularning siyosiy oqibatlari tahlil qilinadi. Globalizatsiya jarayonida madaniyatlararo ziddiyatlar tobora jiddiy muammo sifatida paydo bo'lib, ijtimoiy va siyosiy tizimlarga ta'sir qiladi. Madaniyatlararo nizolarning sabablari etnik, diniy, ijtimoiy va iqtisodiy farqlarga asoslanadi va bu nizolar ko'pincha davlatlar o'rtasidagi diplomatik munosabatlarga, ichki siyosatga va global xavfsizlikka jiddiy ta'sir ko'rsatadi. Maqolada madaniyatlararo ziddiyatlarning siyosiy oqibatlari, shu jumladan ekstremizm, terrorizm va xalqaro xavfsizlikka tahdidlar haqida so'z yuritiladi. Shuningdek, madaniyatlararo nizolarni bartaraf etish uchun xalqaro hamkorlik va muloqotga asoslangan siyosatning zarurligi ta'kidlanadi.
Correlation between magneto-optical and transport properties of Sr doped manganite films
Creators: name: Samoshkina, Yu. E.
name: Edelman, I. S.
name: Rautskii, M. V.
name: Molokeev, M. S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The features of electronic structure of La0.7Sr0.3MnO3, Pr0.8Sr0.2MnO3, and Pr0.6Sr0.4MnO3 polycrystalline films of different thickness have been investigated using magnetic circular dichroism (MCD) in the range of 1.1-4.2 eV. The temperature behavior of the samples electrical resistance were also has been studied. It was found that films with high Sr content (0.3 and 0.4) act as high-temperature semiconductors, while the maximum in the temperature dependences of these films resistivity indicates the transition of the samples to the metallic state at some temperature TM-S, which is different for different sample thickness. The films with the lower Sr content (0.2) act as insulators in the used temperature range. The MCD spectra have been decomposed to the Gaussian-shaped lines, and the temperature dependence of intensity of each line has been analyzed in comparison with temperature dependence of the films magnetization and with their electric conductivity type. Different temperature behavior of the intensity of four specified Gaussian-lines was revealed for semiconductor films. In the case of insulating Pr0.8Sr0.2MnO3 samples, the intensity of three specified Gaussian lines changes with the temperature in the same way as the magnetization changed. It was established that the lanthanide (La, Pr) type does not affect the MCD spectra shape for the films with the same electrical conductivity type. Besides, the correlation between the MCD data of the films and their conductivity type was revealed. Due to the detailed analysis of the specified Gaussian lines with taking into account the well-known in the literature absorption bands, lying outside the studied spectral region, the MCD bands for the studied manganite films have been identified with electronic transitions of a different nature.
description: 5 figures, 6 tables
Implications of a charged-current anomaly at HERA
Creators: name: Babu, K. S.
name: Kolda, Christopher
name: March-Russell, John
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We demonstrate that in the presence of mixing between different scalar leptoquark multiplets it is possible to simultaneously account for the HERA high-$Q^2$ neutral current anomaly, and produce a charged current anomaly of comparable magnitude. The reduced branching ratio to electrons and jets of the lightest leptoquark state results in a significant weakening of the CDF/D0 limits on scalar leptoquarks; masses consistent with the HERA neutral current excess are comfortably within the allowed range. We show that the possibilities for such a successful mixed leptoquark scenario are quite limited, and we investigate some aspects of their phenomenology.
description: 10 pages Latex. Corrected 3-body decay widths
Non-equilibrium dynamics of the piston in the Szilard engine
Creators: name: Bhat, Deepak
name: Dhar, Abhishek
name: Kundu, Anupam
name: Sabhapandit, Sanjib
Publisher: name: arXiv
Year: 2018
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider a Szilard engine in one dimension, consisting of a single particle of mass $m$, moving between a piston of mass $M$, and a heat reservoir at temperature $T$. In addition to an external force, the piston experiences repeated elastic collisions with the particle. We find that the motion of a heavy piston ($M \gg m$), can be described effectively by a Langevin equation. Various numerical evidences suggest that the frictional coefficient in the Langevin equation is given by $γ= (1/X)\sqrt{8 πm k_BT}$, where $X$ is the position of the piston measured from the thermal wall. Starting from the exact master equation for the full system and using a perturbation expansion in $ε= \sqrt{m/M}$, we integrate out the degrees of freedom of the particle to obtain the effective Fokker-Planck equation for the piston albeit with a different frictional coefficient. Our microscopic study shows that the piston is never in equilibrium during the expansion step, contrary to the assumption made in the usual Szilard engine analysis --- nevertheless the conclusions of Szilard remain valid.
Paper2r.docx
Creators: name: Dr Iman Izadgoshasb
Publisher: name: figshare
Year: 2019
Subjects: subject: 90608 Renewable Power and Energy Systems Engineering (excl. Solar Cells)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Piezoelectric materials are capable of converting energy from mechanical vibration to electrical energy. Piezoelectricity stands for pressure electricity and is a property of special crystalline materials including quartz, Rochelle salt, tourmaline, and barium titanate 1 .Piezoelectricity is generated when dielectric materials that have developed a polarization are subjected to mechanical strain deformation. The mechanical strain produces a biasing forcer arrangement of atoms there by creating polarization and thus an electric field 2-3. Conversely, when a piezoelectric material is subjected to an electric field, it will cause a mechanical deformation with in its structure. In both conditions, changing the direction of the applied force, (mechanical or electrical), will generate a change in the direction of the effect 2-3. Harvesting mechanical energy from human motion is an attractive approach for obtaining clean and sustainable electric energy to power wearable sensors, which are widely used for health monitoring, activity recognition, gait analysis and so on. This research studies a piezoelectric energy harvester to convert mechanical energy to electricity using human motions. The harvester exploits walking swing and shock excitations and could be embedded to the shoe. Series of magnets can amplify the foot acceleration in swing phase. The harvester contains a cantilever beam that can vibrate based on foot acceleration and magnetic excitation. Two MFC materials are attached to the beam in parallel to increase the current. The maximum voltage of 50 V AC can be generated in resonance frequency that it could be converted to the DC by using bridge circuit to save in the capacitors or batteries.
Readout delay free Bragg atom interferometry using overlapped spatial fringes
Creators: name: Wigley, P. B.
name: Hardman, K. S.
name: Freier, C.
name: Everitt, P. J.
name: Legge, S.
name: Manju, P.
name: Close, J. D.
name: Robins, N. P.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A method for mitigating the readout delay characteristic of Bragg-based atom interferometry is presented, utilizing an asymmetric Mach-Zehnder interferometer sequence to generate spatial fringes that are read out while still overlapped. The time of flight after the final beamsplitter is engineered to facilitate constructive overlap of the fringes on the output states. A noise analysis performed using a precision atom interferometer is presented, comparing the traditional separated symmetric scheme with that of the separated and overlapped asymmetric scheme showing no significant increase in short term phase noise.
description: 7 pages, 5 figures