cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Educação na Era da Cloroquina
Creators: name: Miotto, Marcio
Publisher: name: Zenodo
Year: 2020
Subjects: cloroquina, covid, covid-19, coronavirus, educação, educacao, brasil

description: Publicado em O Estado da Arte - Estadão, o texto pretende chamar a atenção a duas questões sobre o "ensino emergencial remoto" no contexto da Pandemia de 2020: a respeito do “ensino remoto”, talvez não se tenha dado a devida atenção ao que o termo diz de “remoto”, isto é, ao que está em jogo quanto às tecnologias empregadas. E quanto à discussão sobre o “ensino”, talvez a discussão pedagógica, sobre os efeitos do “ensino remoto” (que não é EAD), também não tenha sido inteiramente feita. Qual é o sentido do “ensino remoto” na pandemia de 2020, entre as promessas tecnológicas e o negacionismo vigente?
Salivary Gland Swelling
Creators: name: Ali, Sajjad
Publisher: name: Zenodo
Year: 2020
Subjects: salivary gland
infection
management
parotid

description: Salivary gland disorders include inflammatory, bacterial, viral, and neoplastic etiologies. The presentation can be acute, recurrent, or chronic. Acute suppurative sialadenitis presents as rapid-onset pain and swelling and is treated with antibiotics, salivary massage, hydration, and sialagogues such as lemon drops or vitamin C lozenges. Viral etiologies include mumps and human immunodeficiency virus, and treatment is directed at the underlying disease. Recurrent or chronic sialadenitis is more likely to be inflammatory than infectious; examples include recurrent parotitis of childhood and sialolithiasis. Inflammation is commonly caused by an obstruction such as a stone or duct stricture. Management is directed at relieving the obstruction. Benign and malignant tumors can occur in the salivary glands and usually present as a painless solitary neck mass. Diagnosis is made by imaging (e.g., ultrasonography, computed tomography, magnetic resonance imaging) and biopsy (initially with fine-needle aspiration). Overall, most salivary gland tumors are benign and can be treated with surgical excision.
Tricholontha Nomura 1952
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Tricholontha

description: Tricholontha Nomura, 1952
[1 species and 1 additional subspecies].
Type species Tricholontha papagena Nomura, 1952, by original designation.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 127, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
A clinical study of scar formation in the human palatal mucosa
Creators: name: Joslin, Breanne Elizabeth
Publisher: name: University of British Columbia
Year: 2013

description: Scar formation is a frequent consequence of wound healing and has widespread negative effects on individuals’ quality of life, both physically and psychologically. For most people, scars are unsightly, but in addition to this, they can result in serious morbidities such as pruritus, pain, contracture, and decreased heat tolerance in severe situations. The association between degree of scarring and depth of dermal injury has been recognized by surgeons for many years, however the cellular and molecular basis for these observations remains poorly understood. Interestingly, oral wounds have been shown to heal faster and with less clinical and histological scar formation than similar skin wounds. It was hypothesized that palatal wounds in general show relatively little scarring and also that there is increased scar formation of the palatal mucosa following a connective tissue graft (CTG) harvest (deep wound) than a free gingival graft (FGG) harvest (superficial wound). This was a retrospective clinical study carried out at the University of British Columbia, Faculty of Dentistry. Intraoral photographs were taken of the palate in 37 subjects. Each subject had undergone a CTG and/or FGG harvest by a Graduate Periodontics resident more than six months prior to the study. 23 FGG and 23 CTG scars were assessed. Two independent calibrated blinded examiners assessed the photographs using a modified version of the Manchester Scar Proforma. A value of zero, one, or two was given for each parameter, with no difference from normal tissue scored as zero and gross mismatch scored as two. The values for each parameter were summed to produce a total scar score, zero to six, for each site. The component parameters were also examined individually so that color, contour, and distortion could be evaluated independently. The results of this study demonstrated that scar formation in the palatal mucosa is minimal and in many cases, non-existent. CTG donor sites did not have more severe scar formation than FGG sites.
Chemosensing in microorganisms to practical biosensors
Creators: name: Ghosh, Surya K.
name: Kundu, Tapanendu
name: Sain, Anirban
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Microorganisms like bacteria can sense concentration of chemo-attractants in its medium very accurately. They achieve this through interaction between the receptors on their cell surface and the chemo-attractant molecules (like sugar). But the physical processes like diffusion set some limits on the accuracy of detection which was discussed by Berg and Purcell in the late seventies. We have a re-look at their work in order to assess what insight it may offer towards making efficient, practical biosensors. We model the functioning of a typical biosensor as a reaction-diffusion process in a confined geometry. Using available data first we characterize the system by estimating the kinetic constants for the binding/unbinding reactions between the chemo-attractants and the receptors. Then we compute the binding flux for this system which Berg and Purcell had discussed. But unlike in microorganisms where the interval between successive measurements determines the efficiency of the nutrient searching process, it turns out that biosensors depend on long time properties like signal saturation time which we study in detail. We also develop a mean field description of the kinetics of the system.
description: 6 pages, 7 figures
Simple Non-Markovian Microscopic Models for the Depolarizing Channel of a Single Qubit
Creators: name: Romero, K. M. Fonseca
name: Franco, R. Lo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The archetypal one-qubit noisy channels ---depolarizing, phase-damping and amplitude-damping channels--- describe both Markovian and non-Markovian evolution. Simple microscopic models for the depolarizing channel, both classical and quantum, are considered. Microscopic models which describe phase damping and amplitude damping channels are briefly reviewed.
description: 13 pages, 2 figures. Title corrected. Paper rewritten. Added references. Some typos and errors corrected. Author added
PEDAGOGICAL MODEL OF THE FORMATION OF PROFESSIONAL COMPETENCES OF LAWYERS: UKRAINIAN REALITY
Creators: name: Kostruba, Anatoliy
Publisher: name: Zenodo
Year: 2020
Subjects: legal education
competent approach
higher education pedagogy
pedagogical didactics
legal clinic

description: Rapid development of information technologies has led to the global computerization of society. As a result of this phenomenon in the field of education, the developed data processing environment, modular assembly of information systems (combination of different types of architectural solutions within the same complex) were formed. Consequently, the process of knowledge accumulation for the development of professional competence skills gradually changes the form of implementation. Well-known goals of higher education that are discovered in such elements as knowledge, understanding, forms of their gaining are subject to changes. The foregoing calls for the change in the educational paradigm one of the components of which, in our opinion, should be the transition to educational goals of another qualitative type in the cognitive field, including the development of applied professional legal skills, development of critical thinking, etc. This study contains the formed algorithm of professional training of the future lawyer which provides for the production of a model for the formation of professional competences of the lawyer as the basic element. Such a pedagogical model shall be based on the organic unity of theoretical, practical, psychophysical training, which in turn will provide the level of professional socialization. The model is based on four segments: target, meaningful, didactic and evaluation and productive. The study of the process of the formation of professional competences of the lawyer using the established model has made it possible to identify shortcomings in the content and didactic segments, which consist in overload of curricula with unnecessary disciplines of humanitarian content and lack of applied component in the educational process.
The First 0.15um MHEMT 6 ”GaAs Foundry Service: Highly Reliable Process for 3 V Drain Bias Operations
Creators: name: Chertouk, M.
name: Chang, W.D.
name: Yuan, C.G.
name: Chen, C.H.
name: Tu, D.W.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: Lattice matched InAlAs/InGaAs/InP HEMTs have performance advantages over more commonly used GaAs PHEMTs due to the high electron velocity and carrier density >1 @. However,manufacturing these devices at high production level is difficult due to the limited size,high cost,and brittle nature of the InP substrate.Growing InAlAs/InGaAs structures metamorphically on GaAs substrates can overcome these substrate issues.However,the ultimate acceptance of MHEMT in commercial application depends upon its providing higher performance compared to other technologies at the same cost.In order to address the needs for both high performance and low manufacturing cost,for the first time,an highly reliable 4 mil 0.15 um MHEMT process has been developed on six inch GaAs substrates with high yield and reproducibility for both power and noise applications.
Adaptive resolution molecular dynamics simulation through coupling to an internal particle reservoir
Creators: name: Fritsch, Sebastian
name: Poblete, Simon
name: Junghans, Christoph
name: Ciccotti, Giovanni
name: Site, Luigi Delle
name: Kremer, Kurt
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: For simulation studies of (macro) molecular liquids it would be of significant interest to be able to adjust or increase the level of resolution within one region of space, while allowing for the free exchange of molecules between open regions of different resolution or representation. We generalize the adaptive resolution idea and suggest an interpretation in terms of an effective generalized grand canonical approach. The method is applied to liquid water at ambient conditions.
Trinoxia Brenske 1894
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Trinoxia

description: Trinoxia Brenske, 1894a
[1 species].
Type species Trinoxia cyphonotoides Brenske, 1894, by monotypy.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 127, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Correlated Domains in Spin Glasses
Creators: name: Billoire, A.
name: Maiorano, A.
name: Marinari, E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the 3D Edwards-Anderson spin glasses, by analyzing spin-spin correlation functions in thermalized spin configurations at low T on large lattices. We consider individual disorder samples and analyze connected clusters of very correlated sites: we analyze how the volume and the surface of these clusters increases with the lattice size. We qualify the important excitations of the system by checking how large they are, and we define a correlation length by measuring their gyration radius. We find that the clusters have a very dense interface, compatible with being space filling.
description: 9 pages, 4 figures. Version accepted for publication
Localized qubits in curved spacetimes
Creators: name: Palmer, Matthew C.
name: Takahashi, Maki
name: Westman, Hans F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We provide a systematic and self-contained exposition of the subject of localized qubits in curved spacetimes. This research was motivated by a simple experimental question: if we move a spatially localized qubit, initially in a state |ψ_1>, along some spacetime path Γfrom a spacetime point x_1 to another point x_2, what will the final quantum state |ψ_2> be at point x_2? This paper addresses this question for two physical realizations of the qubit: spin of a massive fermion and polarization of a photon. Our starting point is the Dirac and Maxwell equations that describe respectively the one-particle states of localized massive fermions and photons. In the WKB limit we show how one can isolate a two-dimensional quantum state which evolves unitarily along Γ. The quantum states for these two realizations are represented by a left-handed 2-spinor in the case of massive fermions and a four-component complex polarization vector in the case of photons. In addition we show how to obtain from this WKB approach a fully general relativistic description of gravitationally induced phases. We use this formalism to describe the gravitational shift in the COW 1975 experiment. In the non-relativistic weak field limit our result reduces to the standard formula in the original paper. We provide a concrete physical model for a Stern-Gerlach measurement of spin and obtain a unique spin operator which can be determined given the orientation and velocity of the Stern-Gerlach device and velocity of the massive fermion. Finally, we consider multipartite states and generalize the formalism to incorporate basic elements from quantum information theory such as quantum entanglement, quantum teleportation, and identical particles. The resulting formalism provides a basis for exploring precision quantum measurements of the gravitational field using techniques from quantum information theory.
description: 53 pages, 7 figures; v2: published version with further corrections. v3: some references and equation typesetting fixed
ENGINEERING DESIGN OF NOVEL 3D MICROPHYSIOLOGICAL SYSTEM AND SENSOR FOR FUNCTIONAL ASSESSMENT OF PANCREATIC BETA-CELLS
Creators: name: Vanderlaan, Emma
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Tissue engineering
Computational physiology
Biofabrication

description: Diabetes, a chronic condition characterized by elevated blood glucose levels, arises when pancreatic β-cells lose capacity to produce a robust, dynamic glucose-stimulated insulin secretion (GSIS) response. Accurate measurement of β-cell health and function ex vivo is thus fundamental to diabetes research, including studies evaluating disease mechanisms, novel drug candidates, and replacement β-cell populations. However, present-day dynamic GSIS assays typically represent end-point measurements, involve expensive commercial perifusion machines, and require time-consuming enzyme-linked immunosorbent assays (ELISA) for insulin detection. Microfluidic devices developed as accessible, low-cost alternatives still rely on secondary ELISAs and suspend islets in liquid medium, limiting their survival in vitro. Here, we present a novel, 3D-printed microphysiological system (MPS) designed to recreate components of in-vivo microenvironments through encapsulation in fibrillar type I collagen and restoration of favorable molecular transport conditions. Following computational-informed design and rapid prototyping, the MPS platform sustained collagen-encapsulated mouse islet viability and cytoarchitecture for 5 days and supported in-situ measurements of dynamic β-cell function. To rapidly detect insulin secretion from β-cells in the MPS, we then developed a highly sensitive electrochemical sensor for zinc (Zn2+), co-released with insulin, based on glassy carbon electrodes modified with bismuth and indium and coated with Nafion. Finally, we validated sensor detection of Zn2+ released from glucose-stimulated INS-1 β-cells and primary mouse islets, finding high correlation with insulin as measured by standard ELISA. Together, the 3D MPS and Zn2+ sensor developed in this dissertation represent novel platforms for evaluating β-cell health and function in a low-cost, user-friendly, and physiologically-relevant manner.
mm-wave Performance of 50nm T-Gate AlGaAs/InGaAs pseudomorphic High Electron Mobility Transistors with fT of 200 GHz
Creators: name: Cao, Xin
name: Boyd, E.
name: Mclelland, Helen
name: Thoms, Stephen
name: Holland, Martin
name: Stanley, Colin
name: Thayne, Iain
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: By combining high resolution electron beam lithography,novel T-gate resist stacks,aggressively scaled vertical architectures and highly uniform,reproducible non-elective single “digital ” gate recess etching techniques,we show it is possible to realise 50 nm gate length GaAs pHEMTs with fT of 200 GHz suitable for applications beyond 100 GHz.This shows that by properly optimising and controlling critical parameters in an aggressively scaled GaAs pHEMT technology,excellent mm-wave performance can be achieved without the need to move to metamorphic GaAs or InP HEMT solutions.
AlGaN/GaN-heterojunction FET with inverted 2DEG Channel
Creators: name: Mokerov, V.G.
name: Velikovskii, L.E.
name: Kanametova, Z.T.
name: Kaminskii, V.E.
name: Sazonov, P.V.
name: Graul, J.
name: Semchinova, O.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: Novel heterojunction AlGaN/GaN-FET with inverted device channel is investigated.FET-heterostructures were grown by MBE on sapphire substrates. Devices were fabricated with 0,25 µ T-shaped gates,using electron beam lithography.Electron density profile under the device gate has demonstrated localization of electrons in very narrow nm-region (<10nm)at the bottom GaN/AlGaN – interface,giving direct evidence of HEMT-nature of our FET ’s.I - V-characteristics of HEMT ’s demonstrated high value of drain current Id max >1A/mm,and good extrinsic transconductance gm ext ≅140mS/mm.DC - specific output power of HEMT was 2,0W/mm.Extrinsic cut off frequency f τ ext of HEMT,determined from transconductance gm and gate-source capacitance Cgs, was 20GHz.Its intrinsic value,f τ ext ,was found to be as high as 36GHz.
Pure Fulde-Ferrell-Larkin-Ovchinnikov state in optical lattices
Creators: name: Chen, A-Hai
name: Xianlong, Gao
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the phase diagram of a one-dimensional, two-component attractive fermions on optical lattices in an off-diagonal confinement. We identify in this system a pure Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state with spatially modulated superfluidity and polarization in a large parameter window, which provides an easier playground to detect the FFLO state experimentally. The clear signature of FFLO state is analyzed in the ground state properties, the pair correlation functions, and the magnetic structure factor, using the density-matrix renormalization group method.
description: revised version, in Phys. Rev. B 85, 134203 (2012)
Vadonaria Dewailly 1950
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Vadonaria

description: Vadonaria Dewailly,1950
[6 species].
Type species Enaria sculptipennis Fairmaire, 1898 (= Vadonaria variegata (Waterhouse, 1882)), by original designation.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 127, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Influence of carbon sources on thermal stability of C-doped base InP/InGaAs heterojunction bipolar transistors
Creators: name: Watanabe, Noriyuki
name: Uchida, Masahiro
name: Yokohama, Hideo
name: Araki, Gako
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: We report effects of annealing on InP/InGaAs heterojunction bipolar transistors (HBTs) having an InGaAs base layer C-doped using CBr 4 or CBrCl 3 as the C source. It was found that ramp thermal annealing (RTA) after growth removes H atoms, which are located in C-dopedd InGaAs base layer and deactivate C acceptors, resulting in a decrease of base sheet resistance. An RTA simultaneously can deteriorate the C-doped base layer. An evaluation of base sheet resistance and dc current gain indicates that InP/InGaAs HBTs with C-doped InGaAs grown using CBrCl 3 are more stable in terms of thermal stress than those grown using CBr 4.
Periodic Cosmological Evolutions of Equation of State for Dark Energy
Creators: name: Bamba, Kazuharu
name: Debnath, Ujjal
name: Yesmakhanova, Kuralay
name: Tsyba, Petr
name: Nugmanova, Gulgasyl
name: Myrzakulov, Ratbay
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We demonstrate two periodic or quasi-periodic generalizations of the Chaplygin gas (CG) type models to explain the origins of dark energy as well as dark matter by using the Weierstrass $\wp(t)$, $σ(t)$ and $ζ(t)$ functions with two periods being infinite. If the universe can evolve periodically, a non-singular universe can be realized. Furthermore, we examine the cosmological evolution and nature of the equation of state (EoS) of dark energy in the Friedmann-Lemaître-Robertson-Walker cosmology. It is explicitly illustrated that there exist three type models in which the universe always stays in the non-phantom (quintessence) phase, whereas it always evolves in the phantom phase, or the crossing of the phantom divide can be realized. The scalar fields and the corresponding potentials are also analyzed for different types of models.
description: 28 pages, 6 figures, title changed, version to appear in a special issue "Modified Gravity: From Black Holes Entropy to Current Cosmology" of Entropy
Phase transition to two-peaks phase in an information cascade voting experiment
Creators: name: Mori, Shintaro
name: Hisakado, Masato
name: Takahashi, Taiki
Publisher: name: arXiv
Year: 2011
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Observational learning is an important information aggregation mechanism. However, it occasionally leads to a state in which an entire population chooses a sub-optimal option. When it occurs and whether it is a phase transition remain unanswered. To address these questions, we performed a voting experiment in which subjects answered a two-choice quiz sequentially with and without information about the prior subjects' choices. The subjects who could copy others are called herders. We obtained a microscopic rule regarding how herders copy others. Varying the ratio of herders led to qualitative changes in the macroscopic behavior in the experiment of about 50 subjects. If the ratio is small, the sequence of choices rapidly converges to the true one. As the ratio approaches 100%, convergence becomes extremely slow and information aggregation almost terminates. A simulation study of a stochastic model for 10^{6} subjects based on the herder's microscopic rule showed a phase transition to the two-peaks phase, where the convergence completely terminates, as the ratio exceeds some critical value.
description: 11 pages, 9 figures, 3 tables
He + -and Fe+ -ion bombardments in the electrical isolation of InP/InGaAs HBT Structures
Creators: name: Subramaniam, Suba C.
name: Rezazadeh, Ali A.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: We have investigated He + -and Fe + -ion bombardments in the electrical isolation of InP/InGaAs HBT and n-InGaAs structures.Single energy of He -ions were bombarded at room temperature whereas multi-energy Fe + -ions were bombarded at 77K and room temperatures.At RT bombardment,maximum Rsh of 5x10 4 Ω/sq and 8x10 4 Ω/sq for He-ions whereas 1x10 5 Ω/sq and ~10 6 Ω/sq for Fe- ions were obtained for the HBT and n-InGaAs structures, respectively.At 77K bombardment,an increase of over five orders of magnitude in Rsh (~5x10 6Ω/sq)when compared to un-bombarded samples,which is very close to the intrinsic value for n-InGaAs (~1x10 7Ω/sq).This is significantly higher than the R bombardment results.
Violation of hyperbolicity via unstable dimension variability in a chain with local hyperbolic chaotic attractors
Creators: name: Kuptsov, Pavel V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We consider a chain of oscillators with hyperbolic chaos coupled via diffusion. When the coupling is strong the chain is synchronized and demonstrates hyperbolic chaos so that there is one positive Lyapunov exponent. With the decay of the coupling the second and the third Lyapunov exponents approach zero simultaneously. The second one becomes positive, while the third one remains close to zero. Its finite-time numerical approximation fluctuates changing the sign within a wide range of the coupling parameter. These fluctuations arise due to the unstable dimension variability which is known to be the source for non-hyperbolicity. We provide a detailed study of this transition using the methods of Lyapunov analysis.
description: 24 pages, 13 figures
Evolution and stratification of off-gasses in stored wood pellets
Creators: name: Yazdanpanah, Fahimeh
Publisher: name: University of British Columbia
Year: 2013

description: Storage of wood pellets has resulted in several deathly accidents in connection with off-gassing and self-heating. The goal of the present study was to quantify off-gassing characteristics of white wood pellets when stored in an experimental silo. Wood pellets properties were characterized with respect to gas adsorption-desorption and spatial and temporal concentrations of off-gases and thermal conditions within the pilot storage were quantified. In the last part, the effectiveness of purging the silo in reducing off-gas concentration was evaluated. To assess the adsorption of off-gases by wood pellets in storage, Temperature Programmed Desorption was used. Highest CO₂ adsorption was seen by torrefied wood pellets while lowest uptake was showed to be for steam exploded pellets. Quantifying the uptake of CO was challenging due to chemical reaction and therefore strong bonds between the material and carbon monoxide. Studies on emission and stratification of off-gases showed higher emission factor compared to work done with white wood pellets in small scale. Some stratifications were observed for CO₂ and CH₄ over the first days of storage. However for CO the stratification was much clear and related to high uptake of CO by wood pellets over time. During the entire period of storage, maximum temperature in the silo was recorded on day 15 of storage (storage time was 63 days) at the elevation of 2.5 m (silo dimension was 1.2m diameter and 4.6m height). Measured temperature in the silo during 5.5 hour purging experiments with air at 18-18.5 °C, helped the temperature decrease in the lower parts and slightly middle parts of the silo after 200 minutes of purging. To evaluate the effectiveness of a purging system to sweep the off-gases from the experimental silo, multiple purging tests were done. Mixing experiments showed large deviations from plug flow and thus better mixing for all superficial velocities used. Predicted results showed the concentration model fitted best to the measured off-gas concentration at the bottom and in the middle of the silo while the model overestimated the exponential decay of the off-gases in the head-space of the silo.
The course and factors associated with recovery of whiplash-associated disorders: an updated systematic review by the Ontario protocol for traffic injury management (OPTIMa) collaboration
Creators: name: Shearer, Heather M.
name: Carroll, Linda J.
name: Côté, Pierre
name: Randhawa, Kristi
name: Southerst, Danielle
name: Varatharajan, Sharanya
name: Wong, Jessica J.
name: Yu, Hainan
name: Sutton, Deborah
name: van der Velde, Gabrielle
name: Nordin, Margareta
name: Gross, Douglas P.
name: Mior, Silvano
name: Stupar, Maja
name: Jacobs, Craig
name: Taylor-Vaisey, Anne
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: To update the findings of the Bone and Joint Decade 2000–2010 Task Force on Neck Pain and Its Associated Disorders (Neck Pain Task Force) on prognostic factors for whiplash-associated disorder (WAD) outcomes. We conducted a systematic review and best-evidence synthesis. We systematically searched MEDLINE, EMBASE, CINAHL and PsycINFO from 2000–2017. Random pairs of reviewers critically appraised eligible studies using the Scottish Intercollegiate Guidelines Network criteria. We retrieved 10,081 articles. Of those, 100 met inclusion criteria. After critical appraisal, 74 were judged to have low risk of bias. This adds to the 47 admissible studies found by the Neck Pain Task Force. Twenty-two related to course of recovery; 59 to prognostic factors in recovery; and 16 reported other WADs outcomes. Some studies related to more than one category. Findings suggest that half of those with WADs will experience substantial improvement within three months and cessation of symptoms within six months. Among factors associated with recovery are post-crash psychological factors, including expectations for recovery and coping. Our review adds to the Neck Pain Task Force by clarifying the role of prognostic factors. Evidence supports the important role of post-crash psychological factors in WADs recovery. CRD42013004610
"Stringy" Coherent States Inspired By Generalized Uncertainty Principle
Creators: name: Ghosh, Subir
name: Roy, Pinaki
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this Letter we have explicitly constructed Generalized Coherent States for the Non-Commutative Harmonic Oscillator that directly satisfy the Generalized Uncertainty Principle (GUP). Our results have a smooth commutative limit. The states show fractional revival which provides an independent bound on the GUP parameter. Using this and similar bounds we derive the largest possible value of the (GUP induced) minimum length scale. Mandel parameter analysis shows that the statistics is Sub-Poissionian.
description: Substantial changes with exact and corrected equations given, no change in basic conclusions, one figure to be supplied on request, to appear in Phys.Lett.B
Amorphous state in the mixed phase of quark-hadron phase transition in protoneutron stars
Creators: name: Yasutake, Nobutoshi
name: Maruyama, Toshiki
name: Tatsumi, Toshitaka
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the hadron-quark mixed phase in protoneutron stars, where neutrinos are trapped and lepton number becomes a conserved quantity besides the baryon number and electric charge. Considering protoneutron-star matter as a ternary system, the Gibbs conditions are applied together with the Coulomb interaction. We find that there no crystalline ("pasta") structure appears in the regime of high lepton-number fraction; the size of pasta becomes very large and the geometrical structure becomes mechanically unstable due to the charge screening effect. Consequently the whole system is separated into two bulk regions like an amorphous state, where the surface effect is safely neglected. There, the local charge neutrality is approximately attained, so that the equation of state is effectively reduced to the one for a binary system. Hence, we conclude that there is no possibility for the density discontinuity to appear in protoneutron-star matter, which is a specific feature in a pure system. These features are important when considering astrophysical phenomena such as supernova explosions or radiation of the gravitational wave from protoneutron stars.
description: 4 pages, 5 figures
Large-signal compact diode noise modelling strategies for non-autonomous RF nonlinear applications
Creators: name: Bonani, F.
name: Donati Guerrieri, S.
name: Ghione, G.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: We discuss system-oriented approaches to identify large-signal, cyclostationary compact noise models of RF pn diodes based on the modulation of small-signal, stationary noise expressions. Two modulation schemes are proposed and compared against a reference solution provided by physics-based large-signal noise simulations. The results point out that the most common modulation scheme exploited in the literature does not compare well with the reference solution, at least when the devices operated near the cutoff frequency.
A novel noise model extraction technique for microwave and millimeter wave HEMT
Creators: name: De Dominicis, M.
name: Giannini, F.
name: Limiti, E.
name: Serino, E.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: In this paper a novel method to extract the noise parameters of active devices up to millimeter wave frequencies is presented.The method is based on parameters and 50 ΩΩΩΩ noise figure measurements only;the extraction of the small-signal equivalent circuit model of the device is not required.The method may be applied to FET with low parasitic elements,e.g.devices having a coplanar layout.A brief description of the measurement set-up used to perform noise figure measurements is given.Lastly,the validity of the proposed technique is demonstrated applying it to a low noise HEMT device from NEC,and comparing the results with those of a more conventional method based on the full knowledge of the device small-signal equivalent circuit.
Devices selection for S to X bands low phase noise oscillator design
Creators: name: Cibiel, G.
name: Llopis, O.
name: Escotte, L.
name: Haquet, G.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: In this paper,a comparative study of various transistors dedicated to low phase noise S to X bands oscillator design is proposed.Then,a transistor selection factor for low phase noise oscillator design is introduced.
Asymptotics of the solutions of the stochastic lattice wave equation
Creators: name: Komorowski, Tomasz
name: Olla, Stefano
name: Ryzhik, Lenya
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider the long time limit theorems for the solutions of a discrete wave equation with a weak stochastic forcing. The multiplicative noise conserves the energy and the momentum. We obtain a time-inhomogeneous Ornstein-Uhlenbeck equation for the limit wave function that holds both for square integrable and statistically homogeneous initial data. The limit is understood in the point-wise sense in the former case, and in the weak sense in the latter. On the other hand, the weak limit for square integrable initial data is deterministic.
A Wideband Low Voltage Low Phase Noise 10-GHz SiGe Switchable VCO
Creators: name: Morigi, Damiana
name: Masini, Leonardo
name: Pozzoni, Massimo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: This paper describes a fully integrated Silicon Germanium (SiGe)Voltage Controlled Oscillator (VCO)chip with 19%tuning range and low phase noise suitable for 10-Gb/s fiber optic transceivers and X-band applications.It consists of two switchable externally enabled VCO ’s.The total chip tuning range is 9.2-11.1GHz when the varactor control voltage varies from 0 to 3.0V and the measured phase noise is –87dBc/Hz at 100KHz offset from carrier.The typical current consumption is 8mA for the VCO core at 3.3V voltage supply.The chip is implemented in SiGe BiCMOS7 technology intended for high volume production.
Approximation of Stochastic Partial Differential Equations by a Kernel-based Collocation Method
Creators: name: Cialenco, Igor
name: Fasshauer, Gregory E.
name: Ye, Qi
Publisher: name: arXiv
Year: 2011
Subjects: subject: Numerical Analysis (math.NA)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 46E22, 65D05, 60G15, 60H15, 65N35

description: In this paper we present the theoretical framework needed to justify the use of a kernel-based collocation method (meshfree approximation method) to estimate the solution of high-dimensional stochastic partial differential equations (SPDEs). Using an implicit time stepping scheme, we transform stochastic parabolic equations into stochastic elliptic equations. Our main attention is concentrated on the numerical solution of the elliptic equations at each time step. The estimator of the solution of the elliptic equations is given as a linear combination of reproducing kernels derived from the differential and boundary operators of the SPDE centered at collocation points to be chosen by the user. The random expansion coefficients are computed by solving a random system of linear equations. Numerical experiments demonstrate the feasibility of the method.
description: Updated Version in International Journal of Computer Mathematics, Closed to Ye's Doctoral Thesis
Varencya Lacroix 1993
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Varencya

description: Varencya Lacroix, 1993
[14 species].
Type species Encya variipennis Blanchard, 1851, by original designation.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 127, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Physiotherapists’ experiences with a four-week mindfulness-based stress reduction program
Creators: name: Pappous, Athanasios
name: Mohammed, Warhel Asim
name: Sharma, Dinkar
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: The study sought to gather the perceptions and experiences of a group of physiotherapists who took part in mindfulness-based stress reduction program (MBSR). Semi-structured interviews were conducted with eight physiotherapists who took part in a four-week formal and self-directed mindfulness meditation program. The data collected were analysed by implementing a thematic analysis. Themes were identified in relation to perceived health benefits (stress reduction and increased attentiveness), the perceived impact of the MBSR on their professional practice and the perceived difficulties in practicing mindfulness. The data from this study offer qualitative evidence that mindfulness practise can become an important element in a physiotherapists’ stress reduction toolkit, by helping them deal with the challenges of their professional practise. The main difficulties encountered with the program were related to the feelings of sleepiness that MBSR induced in them in the beginning. The participants also reported that the long duration of the sessions was another obstacle, suggesting that a brief form of meditation would be preferable and more convenient.
Brane Induced Gravity: From a No-Go to a No-Ghost Theorem
Creators: name: Berkhahn, Felix
name: Hofmann, Stefan
name: Niedermann, Florian
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Numerous claims in the literature suggest that gravity induced on a higher co-dimensional surface violates unitarity in the weak coupling regime. However, it remained unclear, why a conserved source localized on this surface and giving rise to an induced gravity term at low energies would absorb and emit the associated ghost, given a consistent source-free theory. In this article it is shown that the appearance of the induced Einstein Hilbert term does not threaten the unitarity of the theory. The physics arguments behind this statement are presented in a semi-covariant language, but the detailed proof is given using Dirac's constraint analysis. It is shown that the would-be ghost highlighted in previous works is non-dynamical and therefore not associated with a state in the Hilbert space. As a result of these investigations, brane induced gravity goes without a ghost, opening an exciting window of opportunity for consistent deformations of gravity at the largest observable distances.
description: 13 pages, v2: matches version published in Physical Review D
Early fragmentation in the adaptive voter model on directed networks
Creators: name: Zschaler, Gerd
name: Böhme, Gesa A.
name: Seißinger, Michael
name: Huepe, Cristián
name: Gross, Thilo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: We consider voter dynamics on a directed adaptive network with fixed out-degree distribution. A transition between an active phase and a fragmented phase is observed. This transition is similar to the undirected case if the networks are sufficiently dense and have a narrow out-degree distribution. However, if a significant number of nodes with low out degree is present, then fragmentation can occur even far below the estimated critical point due to the formation of self-stabilizing structures that nucleate fragmentation. This process may be relevant for fragmentation in current political opinion formation processes.
description: 9 pages, 8 figures as published in Phys. Rev. E
X-band AlGaN/GaN HEMT MMIC Vo ltage-Controlled Oscillator
Creators: name: Kaper, Val
name: Thompson, Richard
name: Prunty, Tom
name: Shealy, James R.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: AmonolithicAlGaN/GaN HEMT voltage-controlled oscillator has been designed, fabricated and characterized. The oscillator design utilizes a common-gate negative resistance topol-ogy with a multi-finger interdigitated Schottky diode varactor resonator for frequency control. The VCO operating at 15V drain bias and -4 V gate bias, exhibits frequency range between 8.5 and 9.5 GHz with maximum output power of 31.8 dBm across a 50ohmload. Maximum power variation does not exceed ±0.8 dB in the oscillation frequency band. Average phase noise in the bandwith is estimated to be equal to -77 dBc/Hz at 100 kHz offset and -101 dBc/Hz at 1 MHz offset. Average tuning sensitivity is measured to be 120 MHz/V. Oscillator’s pulling figure is equal to 139 MHz for 12 dB return loss. Pushing figure is 114 MHz/V. Output power can be increased up to 35 dBm (2.1 W/mm) by setting drain bias voltage at 30 V.
Non-Linear Statistical Modelling of GaAs FET Integrated Circuits Using Principal Component Analysis Abstract
Creators: name: Balsi, Marco
name: Centurelli, F.
name: Forte, Alessandra
name: Scotti, Giuseppe
name: Tommasino, Pasquale
name: Trifiletti, Alessandro
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: A statistical non-linear model of GaAs FET MMIC ’s which makes use of principal components to describe distance-dependent variations of technological parameters is presented.The proposed model is composed of a nominal non-linear model for the GaAs FET and a correlation matrix which accounts for correlation among parameters of the active devices on the MMIC.The correlation matrix is orthogonalised and reduced by using the Principal Component Analysis (PCA)technique. Capability to reproduce statistical distribution has been checked by comparing measured and modelled S-parameters in the 1-50 GHz frequency range by means of hypothesis tests of equivalence.