cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Pegylis Erichson 1847
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Pegylis

description: Pegylis Erichson, 1847b
[38 species and 1 additional subspecies].
Type species Pegylis morio Erichson, 1847, by monotypy.
Note: Fairmaire in Deyrolle & Fairmaire (1878) incorrectly spelt Pegylis as “ Pegylio ” and “ Pegilius ”.
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 125, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Quantum MMIC (QMMIC) VCO’s for Wireless Applications
Creators: name: Nair, Vijay
name: Deshpande, M.
name: Lewis, Jonathan
name: El-Zein, N.
name: Ageno, Scott
name: Kramer, Gary
name: Kyler, Marilyn
name: Hupp, Mike
name: Goronkin, Herb
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: The monolithic integration of heterostructure tuneling diodes with other semiconductor devices, such as HFET’s, creates novel, quantum functional devices and circuits. The enhanced functionality of these devices enables design of both digital and analog circuits with reduced complexity, smaller size and better performance. Several types of QMMIC VCO’s operating in L-band frequency range have been designed and characterized. VCO’s achieved output power of 8-10 dBm at L-band frequency range. All VCO’s exhibited very low phase noise (in the range of –107 to –115 dBc/Hz) at 1.0 MHz away from the carrier frequency.
Constraints of the variation of fundamental couplings and sensitivity of the equation of state of dense matter
Creators: name: Perez-Garcia, M. A.
name: Martins, C. J. A. P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We discuss the coupled variations of the gravitational, strong and electroweak coupling constants and the current knowledge of the nuclear equation of state based on heavy ion collision experiments and neutron star mass-radius relationship. In particular we focus in our description on phenomenological parameters, $R$, relating variations in the quantum chromodynamics scale $Λ_{QCD}$ and the fine structure constant $α$, and $S$, relating variation of $v$, the Higgs vacuum expectation value and the Yukawa couplings, $h$, in the quark sector. This parametrization is valid for any model where gauge coupling unification occurs at some (unspecified) high energy scale. From a physically motivated set of equations of state for dense matter we obtain the constrained parameter phase space $(R, S)$ in high density nuclear environments. This procedure is complementary to (although currently less powerful than) those used in low density conditions. For variations of $Δα/α=0.005$ we find that the obtained constrained parameter lies on a strip region in the $(R, S)$ plane that partially overlaps some of the allowed values of parameters derived from primordial abundances. This may be of interest in the context of unification scenarios where a dense phase of the universe may have existed at early times.
description: 16 pages, 7 figs, accepted for publication in Phys. Lett. B
ประสบการณ์การท่องเที่ยวเชิงอาหารที่ส่งผลต่อการแบ่งปันประสบการณ์: การศึกษาตัวแปรส่งผ่านและตัวแปรกำกับ
Creators: name: นิมิต ซุ้นสั้น
Publisher: name: คณะพาณิชยศาสตร์และการบัญชี จุฬาลงกรณ์มหาวิทยาลัย
Year: 2021
Subjects: ประสบการณ์
ความผูกพันกับสถานที่
ระยะเวลาการท่องเที่ยว
การแบ่งปันประสบการณ์
Experience
Place Attachment
Length of Stay
Sharing Experience

description: จุฬาลงกรณ์ธุรกิจปริทัศน์, 43, 169, 40-63
Retinal metric: a stimulus distance measure derived from population neural responses
Creators: name: Tkačik, Gašper
name: Granot-Atedgi, Einat
name: Segev, Ronen
name: Schneidman, Elad
Publisher: name: arXiv
Year: 2012
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: The ability of the organism to distinguish between various stimuli is limited by the structure and noise in the population code of its sensory neurons. Here we infer a distance measure on the stimulus space directly from the recorded activity of 100 neurons in the salamander retina. In contrast to previously used measures of stimulus similarity, this "neural metric" tells us how distinguishable a pair of stimulus clips is to the retina, given the noise in the neural population response. We show that the retinal distance strongly deviates from Euclidean, or any static metric, yet has a simple structure: we identify the stimulus features that the neural population is jointly sensitive to, and show the SVM-like kernel function relating the stimulus and neural response spaces. We show that the non-Euclidean nature of the retinal distance has important consequences for neural decoding.
description: 5 pages, 4 figures, to appear in Phys Rev Lett
Spherical alterations of handles: embedding the manifold plus construction
Creators: name: Guilbault, Craig R.
name: Tinsley, Frederick C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57N15, 57Q12, 57R65, 57Q10

description: A key tool in our earlier work on ends of manifolds high-dimensional manifolds was an ability to embed cobordisms provided by the Quillen Plus Construction into those ends. Here we develop a `spherical modification' trick which provides a constructive approach to obtaining such embeddings. More importantly, this approach allows for more general embedding results. In this paper we develop generalizations of the plus construction and show how the corresponding cobordisms can be embedded in manifolds satisfying appropriate fundamental group properties. Results obtained here play an important role in our ongoing study of noncompact manifolds.
description: This final version will appear in Algebraic & Geometric Topology. Small corrections, including a fix to the statement of Theorem 5.3. 22 pages, 4 figures
Logic in the tractatus
Creators: name: Weiss, Max
Publisher: name: University of British Columbia
Year: 2013

description: What is logic, in the Tractatus? There is a pretty good understanding what is logic in Grundgesetze, or Principia. With respect to the Tractatus no comparably definite answer has been received. One might think that this is because, whether through incompetence or obscurantism,Wittgenstein simply does not propound a definite conception. To the contrary, I argue that the text of the Tractatus supports, up to a high degree of confidence, the attribution of a philosophically well-motivated and mathematically definite answer to the question what is logic.
Unconditional stabilization of CS and CG Mesfet Transistor
Creators: name: Hammad, Hany F.
name: Freundorfer, Alois P.
name: Antar, Yahia M.M.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: Feedback is used to achieve multi-band unconditional stability for GaAs MESFET transistor. Analytical formulation based on evaluating the stability parameters as a function of the transistor model elements is provided, with two methods to accurately estimate the feedback values needed for all-band unconditional stability. The technique is applied to common source and common gate configurations. Both were monolithically fabricated and tested, and very good agreement between the predicted and measured results is obtained.
High Dynamic-Range and Very Low Noise K-Band p-HEMT LNA MMIC for LMDS and Satellite Communication
Creators: name: Hirata, M.
name: Mimino, Y.
name: Hasegawa, Y.
name: Fukaya, J.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: An excellent noise figure and high linearity, K-band p-HEMT LNA MMIC, that incorporates single-bias configuration and negative feedback circuit, has be en developed for LMDS (Local Multi-point Distribution Service) and satellite communication. The third order intercept point (IP3) of this MMIC is 20 dBm, while output power at 1-dB gain compression is 8.5 dBm. The IP3 and noise figure is 19.5 +/- 1 dBm and 1.8 +/- 0.2 dB, respectively, at frequencies between 24 and 32 GHz. The die size of the MMIC is 1.9 mm. This MMIC shows a potential reliable application in high-speed wireless access system.
การวิเคราะห์คุณภาพบริการของผู้ใช้บริการแท็กซี่ด้วยแบบจำลองคาโน: การพัฒนาในมุมมองผู้โดยสาร
Creators: name: ธนัตถ์ภัทร ถิรธนัชดิลก
Publisher: name: คณะพาณิชยศาสตร์และการบัญชี จุฬาลงกรณ์มหาวิทยาลัย
Year: 2021
Subjects: คุณภาพบริการแท็กซี่
ผู้ใช้บริการแท็กซี่
แบบจำลองคาโน
มุมมองของผู้โดยสาร
Taxi Service Quality
Taxi Passengers
Kano Model
Customer's Perspective

description: จุฬาลงกรณ์ธุรกิจปริทัศน์, 43, 169, 64-82
Partially disordered state and spin-lattice coupling in an S=3/2 triangular lattice antiferromagnet Ag2CrO2
Creators: name: Matsuda, M.
name: Yoshida, H.
name: Isobe, M.
name: de la Cruz, C.
name: Fishman, R. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Ag2CrO2 is an S=3/2 frustrated triangular lattice antiferromagnet without orbital degree of freedom. With decreasing temperature, a 4-sublatice spin state develops. However, a long-range partially disordered state with 5 sublattices abruptly appears at TN=24 K, accompanied by a structural distortion, and persists at least down to 2 K. The spin-lattice coupling stabilizes the anomalous state, which is expected to appear only in limited ranges of further-neighbor interactions and temperature. It was found that the spin-lattice coupling is a common feature in triangular lattice antiferromagnets with multiple-sublattice spin states, since the triangular lattice is elastic.
description: 5 pages, 5 figures
Hypopholis Erichson 1847
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Hypopholis

description: Hypopholis Erichson, 1847b.
Type species Hypopholis sommeri Burmeister, 1855, by subsequent monotypy.
Synonymy by Harrison (2014).
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 125, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Die Reise vor der Reise. Eine digitale Edition von Alexander von Humboldts Reiseaufzeichnungen Dresden, Wien, Salzburg 1797–1798 (3 Poster)
Creators: name: Bergmann, Jannes
name: Dargel, Karl
name: Meyer, Paul-Julius
name: Poggel, Lisa
name: Radulescu, Gabriela
name: Sendhardt, Christof
Publisher: name: Zenodo
Year: 2019
Subjects: Alexander von Humboldt
Amerikanisches Reisetagebuch
Edition
Messverfahren
Anthrakometer
Geo-Browsing
XML
TEI
Wissenschaftsgeschichte
18. - 19. Jahrhundert
Forschungsreise
Tagebuch
Digital History
Digitales Edieren
Digital Humanities

description: Die Poster stellen exemplarisch den Editionsprozess eines Ausschnitts aus Alexander von Humboldts Amerikanischem Reisetagebuch, seiner Reise nach Dresden, Wien und Salzburg 1797–1798, vor und geben Einblick in die Reiseroute und die unterwegs durchgeführten Messungen. Das erste Poster stellt das Tagebuch einschließlich einer digital kartografierten Route von Humboldts Reise vor. Das zweite Poster gibt Einblick in Humboldts Messtechniken bei der Erforschung des CO2-Gehalts der Luft und bildet das dazu von ihm entwickelte Instrument in einem rekonstruierten 3D-Modell ab. Das dritte Poster führt detailliert in die Arbeitsschritte und Besonderheiten einer digitalen Edition ein.

Die Poster wurden für den "Salon Sophie Charlotte" der Berlin-Brandenburgischen Akademie der Wissenschaften am 19. Januar 2019 von einer Gruppe Studierender der Humboldt-Universität, der Freien Universität und der Technischen Universität Berlin im Rahmen des Masterseminars „Messen, Sammeln, Beschreiben. Ein digitales Forschungsprojekt zu Alexander von Humboldts ‚Reise vor der Reise‘ (1797/98)“ erstellt. Das Seminar wurde von drei Mitarbeitern der edition humboldt digital an der Berlin-Brandenburgischen Akademie der Wissenschaften (Dr. Tobias Kraft, Dr. Ulrich Päßler und Christian Thomas) begleitet und fand im Rahmen des forschungsorientierten „Q-Programms“ des bologna.lab statt.

Im Zentrum des Seminars stand die erstmalige Edition und Erschließung seiner Reiseaufzeichnungen. Wie im Laufe des Edierens deutlich wurde, nutzte Humboldt seine wechselnden Aufenthalte zu umfangreichen Messungen und Exkursionen in der näheren Umgebung - letztlich mit dem Ziel, sich auf die weitaus ambitioniertere und bekanntere sogenannte “Amerikanische Reise” vorzubereiten.
description: Diese Poster können unter den Bedingungen der Creative Commons-Lizenz CC BY-SA 4.0 nachgenutzt werden.
Hadron-Quark Crossover and Massive Hybrid Stars with Strangeness
Creators: name: Masuda, Kota
name: Hatsuda, Tetsuo
name: Takatsuka, Tatsuyuki
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Using the idea of a smooth crossover from the hadronic matter with hyperons to quark matter with strangeness, we show that the maximum mass of neutron stars with quark matter core can be larger than those without quark matter core. This is in contrast to the conventional softening of equation of state due to exotic components at high density. Essential conditions to reach our conclusion are (i) the crossover takes place at relatively low densities, around 3 times the normal nuclear density, and (ii) the quark matter is strongly interacting in the crossover region. By these, the pressure of the system can be greater than that of purely hadronic matter in the crossover region and leads to the maximum mass greater than 2 solar mass. This conclusion is insensitive to the different choice of the hadronic equation of state with hyperons. Several implications of this result to the nuclear incompressibility, the hyperon mixing, and the neutrino cooling are also remarked.
description: 5 pages, 5 figures and 2 table, Typos and minor numerical errors in Fig.2-5 corrected, Fig.1 is modified and Table 2 is added, Fig.4,5 are modified, to appear in ApJ
DC to 11GHz Fully Integrated GaAs Up Conversion Mixer
Creators: name: Witvers, R.H.
name: Bij De Vaate, J.G.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: This paper describes the design and realization of a wide band single balanced fully integrated up-conversion mixer. The mixer has a RF bandwidth from 1 to 11GHz and an IF at 14 GHz, with an 1GHz bandwidth. This requires a LO frequency range from 15 to 25GHz. This single balanced mixer needs a single RF signal and a differential LO signals. The wide LO band prevents the use of a passive single to differential converter. We choose to integrate an active single to differential converter on chip. The output of the mixer core needs to be buffered. This to prevent unwanted mixing due to reflected signals from the IF output. To have enough buffering two single amplifiers are included.
Adoretopsis Fairmaire 1887
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Adoretopsis

description: Adoretopsis Fairmaire, 1887b.
Type species Adoretopsis tenuitarsis Fairmaire, 1887, by monotypy.
Synonymy by Lacroix (2010).
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 125, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Quivers with potentials associated to triangulated surfaces, Part III: tagged triangulations and cluster monomials
Creators: name: Irelli, Giovanni Cerulli
name: Labardini-Fragoso, Daniel
Publisher: name: arXiv
Year: 2011
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 16S99, 13F60

description: To each tagged triangulation of a surface with marked points and non-empty boundary we associate a quiver with potential, in such a way that whenever we apply a flip to a tagged triangulation, the Jacobian algebra of the QP associated to the resulting tagged triangulation is isomorphic to the Jacobian algebra of the QP obtained by mutating the QP of the original one. Furthermore, we show that any two tagged triangulations are related by a sequence of flips compatible with QP-mutation. We also prove that for each of the QPs constructed, the ideal of the non-completed path algebra generated by the cyclic derivatives is admissible and the corresponding quotient is isomorphic to the Jacobian algebra. These results, which generalize some of the second author's previous work for ideal triangulations, are then applied to prove properties of cluster monomials, like linear independence, in the cluster algebra associated to the given surface by Fomin-Shapiro-Thurston (with an arbitrary system of coefficients).
description: v4: Added: Comparison of our results on linear independence of cluster monomials with results obtained by other authors; a couple of examples and figures; references. Some typos corrected. Final version, to appear in Compositio Mathematica. 27 pages, 9 figures
Riemann solver for a kinematic wave traffic model with discontinuous flux
Creators: name: Wiens, Jeffrey K.
name: Stockie, John M.
name: Williams, JF
Publisher: name: arXiv
Year: 2011
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35L65, 35L67, 35R05, 65M08, 76L05

description: We investigate a model for traffic flow based on the Lighthill-Whitham-Richards model that consists of a hyperbolic conservation law with a discontinuous, piecewise-linear flux. A mollifier is used to smooth out the discontinuity in the flux function over a small distance epsilon << 1 and then the analytical solution to the corresponding Riemann problem is derived in the limit as epsilon goes to 0. For certain initial data, the Riemann problem can give rise to zero waves that propagate with infinite speed but have zero strength. We propose a Godunov-type numerical scheme that avoids the otherwise severely restrictive CFL constraint that would arise from waves with infinite speed by exchanging information between local Riemann problems and thereby incorporating the effects of zero waves directly into the Riemann solver. Numerical simulations are provided to illustrate the behaviour of zero waves and their impact on the solution. The effectiveness of our approach is demonstrated through a careful convergence study and comparisons to computations using a third-order WENO scheme.
description: 33 pages, 58 figures
A 2GHz Delta-Sigma Modulator implemented in InP HBT technology
Creators: name: Hincelin, Guillaume
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: A first-order Delta-Sigma ( ∆Σ ) modulator has been fabricated using a 70GHz (fT) AlInAs/GaInAs-InP HBT technology. At a sampling rate of 2GHz, it converts a 50MHz signal with a maximum signal-to-noise ratio (SNRmax) of 19dB and a dynamic range (DR) of 25dB, equivalent to 3.9DRbits. With a 10MHz signal, 36.5dB DR (5.8DRbits) and 30.8dB SNRmax are achieved. The modulator has been designed in a fully differential architecture, and dissipates 330mW from a -5V power supply. This paper presents the performance of a first-order, continuous-time, low-pass ∆Σ modulator. To date only a few results have been reported for first-order ∆Σ modulator implemented in a III-V technology. A first-order architecture represents a fundamental first step in the design of higher order modulator offering better performance.
Everything is Entangled
Creators: name: Buniy, Roman V.
name: Hsu, Stephen D. H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that big bang cosmology implies a high degree of entanglement of particles in the universe. In fact, a typical particle is entangled with many particles far outside our horizon. However, the entanglement is spread nearly uniformly so that two randomly chosen particles are unlikely to be directly entangled with each other -- the reduced density matrix describing any pair is likely to be separable.
description: 5 pages, 3 figures, revtex. arXiv admin note: text overlap with arXiv:0908.1265
Pegylidius Peringuey 1904
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Pegylidius

description: Pegylidius Péringuey, 1904.
Type species Pegylidius mashunus Péringuey, 1904, by monotypy.
Synonymy by Arrow (1943).
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 125, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Analysis of HEMT time-evolution characteristics
Creators: name: Parker, Anthony E.
name: Rathmell, James G.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: A novel transient measurement of the time-evolution of drain characteristics is analyzed to separate thermal and trapping dispersions. The procedure extracts isothermal characteristics from the measured data and para-meterizes thermal dispersion. A significant dispersion effect in the isothermal characteristics is then linked to leakage currents that are related to drain potential. The effect of impact ionization is also evident in the data. This analysis provides information necessary to formulate bias- and rate-dependent models of HEMTs.
Repulsive polarons in two-dimensional Fermi gases
Creators: name: Ngampruetikorn, V.
name: Levinsen, J.
name: Parish, Meera M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We consider a single spin-down impurity atom interacting via an attractive, short-range potential with a spin-up Fermi sea in two dimensions (2D). Similarly to 3D, we show how the impurity can form a metastable state (the "repulsive polaron") with energy greater than that of the non-interacting impurity. Moreover, we find that the repulsive polaron can acquire a finite momentum for sufficiently weak attractive interactions. Even though the energy of the repulsive polaron can become sizeable, we argue that saturated ferromagnetism is unfavorable in 2D because of the polaron's finite lifetime and small quasiparticle weight.
description: 6 pages, 3 figures
Recovery times and adverse events between propofol and midazolam during colonoscopy
Creators: name: Switzer, Jennifer Margaret
Publisher: name: University of British Columbia
Year: 2013

description: Sedation and analgesia are integral to successful colonoscopy completion and controversy surrounds the optimal pharmacokinetic agent that will target and maintain a moderate sedation level, offer operational efficiency with reduced recovery time, and minimize risk for cardiopulmonary complications. Current practice is imprecise; manual administration of procedural sedation using a combination of benzodiazepine and opioids puts patients at risk for descending into deeper levels of sedation, which can lead to risk for cardiorespiratory depression, and an increase in recovery times for up to two hours. Studies have reported that propofol, a sedative agent with a short half life, can result in a shorter recovery, however there is limited research that has used consistent measurement to evaluate the procedural sedation recovery process or the influence of predictors such as age, sex, medication history, medical history, procedure time and body mass index (BMI), on recovery time and cardiopulmonary risk. Therefore, a non-experimental descriptive retrospective study was undertaken with two groups of 100 subjects who had either midazolam administered manually or propofol administered using the Sedasys® System for colonoscopy to explore the differences in procedure length and recovery time between these groups. Participants in the propofol group were somewhat younger and healthier than those in the midazolam group; average age 50.1 years versus 58.9 years, took fewer cardiac medications, had a lower BMI, and a lower incidence of cardiac or respiratory disease. Multiple regression analyses were conducted to assess the contribution of independent clinical predictors (age, sex, BMI, medical history and medication history) for duration of recovery from procedural sedation and analgesia and the incidence of sedation-related ii adverse events. Propofol provided the largest contribution to the variance in recovery time after controlling for other significant predictors (R-squared = 0.22). Based on the MOAA/S score, participants who received propofol were discharged home sooner than those who received midazolam. There were no adverse events in either group. The results of this study suggest that propofol for procedural sedation during colonoscopy may improve efficiencies and throughput in the endoscopy suite and may provide a safe means that can assist in meeting the rising demand for colonoscopy.
title: How big is the influence of biogenic silicon pools on short-term changes in water-soluble silicon in soils?
title: Implications from a study of a 10-year-old soil–plant system
titleType: Subtitle
Creators: name: Puppe, Daniel
name: Höhn, Axel
name: Kaczorek, Danuta
name: Wanner, Manfred
name: Wehrhan, Marc
name: Sommer, Michael
Publisher: name: Universität Potsdam
Year: 2019

description: The significance of biogenic silicon (BSi) pools as a key factor for the control of Si fluxes from terrestrial to aquatic ecosystems has been recognized for decades. However, while most research has been focused on phytogenic Si pools, knowledge of other BSi pools is still limited. We hypothesized that different BSi pools influence short-term changes in the water-soluble Si fraction in soils to different extents. To test our hypothesis we took plant (Calamagrostis epigejos, Phragmites australis) and soil samples in an artificial catchment in a post-mining landscape in the state of Brandenburg, Germany. We quantified phytogenic (phytoliths), protistic (diatom frustules and testate amoeba shells) and zoogenic (sponge spicules) Si pools as well as Tironextractable and water-soluble Si fractions in soils at the beginning (t(0)) and after 10 years (t(10)) of ecosystem development. As expected the results of Tiron extraction showed that there are no consistent changes in the amorphous Si pool at Chicken Creek (Huhnerwasser) as early as after 10 years. In contrast to t(0) we found increased water-soluble Si and BSi pools at t(10); thus we concluded that BSi pools are the main driver of short-term changes in water-soluble Si. However, because total BSi represents only small proportions of water-soluble Si at t(0) (< 2 %) and t(10) (2.8-4.3 %) we further concluded that smaller (< 5 mu m) and/or fragile phytogenic Si structures have the biggest impact on short-term changes in water-soluble Si. In this context, extracted phytoliths (> 5 mu m) only amounted to about 16% of total Si con-tents of plant materials of C. epigejos and P. australis at t(10); thus about 84% of small-scale and/or fragile phytogenic Si is not quantified by the used phytolith extraction method. Analyses of small-scale and fragile phytogenic Si structures are urgently needed in future work as they seem to represent the biggest and most reactive Si pool in soils. Thus they are the most important drivers of Si cycling in terrestrial biogeosystems.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe, 633
Performance Comparison of HBTs and Quasi E-mode PHEMTs for Single Supply High Efficiency Power Amplifiers
Creators: name: Tkachenko, Y.
name: Wei, C.
name: Sprinkle, S.
name: Gering, J.
name: Lee, J.
name: Kao, T.
name: Zhao, Y.
name: Ho, W.
name: Sun, M.
name: Bartle, D.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: Performance of an HBT and a Quasi Enhancement Mode PHEMT (QE-PHEMT) unit cell is compared for wireless telephone PA applications. While the HBT has advantages of smaller chip size and single supply with no drain switch operation, the QE-PHEMT has higher efficiency and better low voltage characteristics. PA power control and device design trade-offs for both technologies are also discussed.
title: Impacts of temperature extremes on European vegetation during the growing season
Creators: name: Baumbach, Lukas
name: Siegmund, Jonatan Frederik
name: Mittermeier, Magdalena
name: Donner, Reik Volker
Publisher: name: Universität Potsdam
Year: 2019

description: Temperature is a key factor controlling plant growth and vitality in the temperate climates of the mid-latitudes like in vast parts of the European continent. Beyond the effect of average conditions, the timings and magnitudes of temperature extremes play a particularly crucial role, which needs to be better understood in the context of projected future rises in the frequency and/or intensity of such events. In this work, we employ event coincidence analysis (ECA) to quantify the likelihood of simultaneous occurrences of extremes in daytime land surface temperature anomalies (LSTAD) and the normalized difference vegetation index (NDVI). We perform this analysis for entire Europe based upon remote sensing data, differentiating between three periods corresponding to different stages of plant development during the growing season. In addition, we analyze the typical elevation and land cover type of the regions showing significantly large event coincidences rates to identify the most severely affected vegetation types. Our results reveal distinct spatio-temporal impact patterns in terms of extraordinarily large co-occurrence rates between several combinations of temperature and NDVI extremes. Croplands are among the most frequently affected land cover types, while elevation is found to have only a minor effect on the spatial distribution of corresponding extreme weather impacts. These findings provide important insights into the vulnerability of European terrestrial ecosystems to extreme temperature events and demonstrate how event-based statistics like ECA can provide a valuable perspective on environmental nexuses.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe, 642
An efficient algorithm for the diameter of Cayley graphs generated by transposition trees
Creators: name: Ganesan, Ashwin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Data Structures and Algorithms (cs.DS)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: A problem of practical and theoretical interest is to determine or estimate the diameter of various families of Cayley networks. The previously known estimate for the diameter of Cayley graphs generated by transposition trees is an upper bound given in the oft-cited paper of Akers and Krishnamurthy (1989). In this work, we first assess the performance of their upper bound. We show that for every $n$, there exists a tree on $n$ vertices, such that the difference between the upper bound and the true diameter value is at least $n-4$. Evaluating their upper bound takes time $Ω(n!)$. In this paper, we provide an algorithm that obtains an estimate of the diameter, but which requires only time $O(n^2)$; furthermore, the value obtained by our algorithm is less than or equal to the previously known diameter upper bound. Such an improvement to polynomial time, while still performing at least as well as the previous bound, is possible because our algorithm works directly with the transposition tree on $n$ vertices and does not require examining any of the permutations. We also provide a tree for which the value computed by our algorithm is not necessarily unique, which is an important result because such examples are quite rare. For all families of trees we have investigated so far, each of the possible values computed by our algorithm happens to also be an upper bound on the diameter.
description: A journal version that includes parts of arXiv:1111.3114
title: A complete representation of uncertainties in layer-counted paleoclimatic archives
Creators: name: Boers, Niklas
name: Goswami, Bedartha
name: Ghil, Michael
Publisher: name: Universität Potsdam
Year: 2019

description: Accurate time series representation of paleoclimatic proxy records is challenging because such records involve dating errors in addition to proxy measurement errors. Rigorous attention is rarely given to age uncertainties in paleoclimatic research, although the latter can severely bias the results of proxy record analysis. Here, we introduce a Bayesian approach to represent layer-counted proxy records - such as ice cores, sediments, corals, or tree rings - as sequences of probability distributions on absolute, error-free time axes. The method accounts for both proxy measurement errors and uncertainties arising from layer-counting-based dating of the records. An application to oxygen isotope ratios from the North Greenland Ice Core Project (NGRIP) record reveals that the counting errors, although seemingly small, lead to substantial uncertainties in the final representation of the oxygen isotope ratios. In particular, for the older parts of the NGRIP record, our results show that the total uncertainty originating from dating errors has been seriously underestimated. Our method is next applied to deriving the overall uncertainties of the Suigetsu radiocarbon comparison curve, which was recently obtained from varved sediment cores at Lake Suigetsu, Japan. This curve provides the only terrestrial radiocarbon comparison for the time interval 12.5-52.8 kyr BP. The uncertainties derived here can be readily employed to obtain complete error estimates for arbitrary radiometrically dated proxy records of this recent part of the last glacial interval.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe, 641
Dynamic large-signal I-V analysis and non-linear modelling of
ALGAN/GAN HEMTS
Creators: name: Chigaeva, E.
name: Wieser, N.
name: Walthes, W.
name: Grözing, M.
name: Berroth, M.
name: Roll, H.
name: Breitschädel, O.
name: Off, J.
name: Kuhn, B.
name: Scholz, F.
name: Schweizer, H.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: For AlGaN/GaN high electron mobility transistors (HEMTs), the voltage and current waveforms at CW large-signal operation at 5 GHz have been reconstructed from experimental magnitude and phase information on fundamental and higher harmonics of transmitted and reflected signals. To compare with the DC behaviour, the clipped waveforms have accurately been analysed to recover the dynamic output characteristics in view of dispersion effects related to self-heating. In conjunction with small-signal S-parameter data, the large-signal experimental results have been used in an attempt to apply a HEMT large-signal model, showing satisfactory agreement of simulated and measured characteristics at least in regions where self-heating is not much pronounced.
Pentaphylla Dewailly 1950
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Pentaphylla

description: Pentaphylla Dewailly, 1950
[2 species].
Type species Pentaphylla gieseckiei Dewailly, 1950, 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 125, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
title: Costs of sea dikes
title: Regressions and uncertainty estimates
titleType: Subtitle
Creators: name: Lenk, Stephan
name: Rybski, Diego
name: Heidrich, Oliver
name: Dawson, Richard J.
name: Kropp, Jürgen Peter
Publisher: name: Universität Potsdam
Year: 2019

description: Failure to consider the costs of adaptation strategies can be seen by decision makers as a barrier to implementing coastal protection measures. In order to validate adaptation strategies to sea-level rise in the form of coastal protection, a consistent and repeatable assessment of the costs is necessary. This paper significantly extends current knowledge on cost estimates by developing - and implementing using real coastal dike data - probabilistic functions of dike costs. Data from Canada and the Netherlands are analysed and related to published studies from the US, UK, and Vietnam in order to provide a reproducible estimate of typical sea dike costs and their uncertainty. We plot the costs divided by dike length as a function of height and test four different regression models. Our analysis shows that a linear function without intercept is sufficient to model the costs, i.e. fixed costs and higher-order contributions such as that due to the volume of core fill material are less significant. We also characterise the spread around the regression models which represents an uncertainty stemming from factors beyond dike length and height. Drawing an analogy with project cost overruns, we employ log-normal distributions and calculate that the range between 3x and x/3 contains 95% of the data, where x represents the corresponding regression value. We compare our estimates with previously published unit costs for other countries. We note that the unit costs depend not only on the country and land use (urban/non-urban) of the sites where the dikes are being constructed but also on characteristics included in the costs, e.g. property acquisition, utility relocation, and project management. This paper gives decision makers an order of magnitude on the protection costs, which can help to remove potential barriers to develop-ing adaptation strategies. Although the focus of this research is sea dikes, our approach is applicable and transferable to other adaptation measures.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe, 638
Cosmic Electromagnetic Fields due to Perturbations in the Gravitational Field
Creators: name: Mongwane, Bishop
name: Dunsby, Peter K. S.
name: Osano, Bob
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We use non-linear gauge-invariant perturbation theory to study the interaction of an inflation produced seed magnetic field with density and gravitational wave perturbations in an almost Friedmann-Lemaître-Robertson-Walker (FLRW) spacetime. We compare the effects of this coupling under the assumptions of poor conductivity, infinite conductivity and the case where the electric field is sourced via the coupling of velocity perturbations to the seed field in the ideal magnetohydrodynamic (MHD) regime, thus generalizing, improving on and correcting previous results. We solve our equations for long wavelength limits and numerically integrate the resulting equations to generate power spectra for the electromagnetic field variables, showing where the modes cross the horizon. We find that the rotation of the electric field dominates the power spectrum on small scales, in agreement with previous arguments.
description: 16 pages, 3 figures, published in PRD
Measurement and Simulation of Microwave Noise Transient of InP/InGaAs DHBT with Polyimide Passivattion
Creators: name: Xiong, Yong Zhong
name: Ng, Geok-Ing
name: Wang, Hong
name: Fu, Jeffrey S.
name: K, Radhakrishnan
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: Measurement and simulation of microwave noise transient of InP/InGaAs DHBT with polyimide passivation is reported in this paper for the first time and is believed to contribute to the overall broadband shot noise. This work provides a better insight into the noise transient mechanism of InP HBTs due to polyimide passivation and can be used to improve the device and circuit reliability.
title: Quality assurance framework - the concept of quality assurance applied to fisheries data and its operationalisation under the ICES scope
Creators: name: Nedreaas, Kjell
name: Stransky, Christoph
name: Jardim, Ernesto
name: Vigneau, Joёl
Publisher: name: ASC 2009 - Theme session N
Year: 2024
Subjects: Fisheries and aquaculture
Technologies and data

description: No abstracts are to be cited without prior reference to the author.Why assessments should have a quality check. Quality assurance of input parameters for stock assessment is a major subject promoting the confidence of scientists and stakeholders in the advice provided by ICES. Issues about quality assurance are included in the current MoU between EC and ICES. ICES is responsible for quality control of the aggregated data used in assessments and shall decide which data are considered a useful basis for advice. The decision process must be transparent, based on scientific information and fully documented. Institutions and individuals involved on providing input data to ICES must be informed about the processing, usage and shortcomings of the data.
Microwave glob top for space applications : A route to non hermiticity
Creators: name: Monfraix, P.
name: Albo, L.
name: Drevon, C.
name: Cazaux, Jean-Louis
name: Roux, J.L.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: This paper presents the electrical design, measurement and reliability tests of an encapsulated MMIC using a dam & fill technique. Materials, dispensing techniques, RF design are evaluated. Test samples have been designed and manufactured. Electrical results show a slight decay in frequency of the electrical characteristics (about 300MHz) but the component still offers good performances in the relevant bandwidth for receivers.
title: A comparative survey of the impacts of extreme rainfall in two international case studies
Creators: name: Spekkers, Matthieu
name: Rözer, Viktor
name: Thieken, Annegret Henriette
name: ten Veldhuis, Marie-Claire
name: Kreibich, Heidi
Publisher: name: Universität Potsdam
Year: 2019

description: Flooding is assessed as the most important natural hazard in Europe, causing thousands of deaths, affecting millions of people and accounting for large economic losses in the past decade. Little is known about the damage processes associated with extreme rainfall in cities, due to a lack of accurate, comparable and consistent damage data. The objective of this study is to investigate the impacts of extreme rainfall on residential buildings and how affected households coped with these impacts in terms of precautionary and emergency actions. Analyses are based on a unique dataset of damage characteristics and a wide range of potential damage explaining variables at the household level, collected through computer-aided telephone interviews (CATI) and an online survey. Exploratory data analyses based on a total of 859 completed questionnaires in the cities of Munster (Germany) and Amsterdam (the Netherlands) revealed that the uptake of emergency measures is related to characteristics of the hazardous event. In case of high water levels, more efforts are made to reduce damage, while emergency response that aims to prevent damage is less likely to be effective. The difference in magnitude of the events in Munster and Amsterdam, in terms of rainfall intensity and water depth, is probably also the most important cause for the differences between the cities in terms of the suffered financial losses. Factors that significantly contributed to damage in at least one of the case studies are water contamination, the presence of a basement in the building and people's awareness of the upcoming event. Moreover, this study confirms conclusions by previous studies that people's experience with damaging events positively correlates with precautionary behaviour. For improving future damage data acquisition, we recommend the inclusion of cell phones in a CATI survey to avoid biased sampling towards certain age groups.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe, 640
Design of novel multilayer microwave coupled-line structures using thick-film technology
Creators: name: Tian, Zhengrong
name: Free, Charles
name: Barnwell, Peter
name: Wood, James
name: Aitchison, Colin
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: A novel octave band DC block (2.5 -10.5GHz) and a broadband 3dB directional coupler (3-8GHz) have been designed, fabricated and tested using a new multilayer format. The multiple layers of thick-film dielectric and metal were printed on an alumina base and an etching technique used to form the final conductor pattern. The tight coupling required between the coupled lines was realized by overlapping these lines in a multilayer structure. Very good agreement was obtained between measured and simulated data. The results demonstrate that multilayer thick-film techniques provide an efficient method of achieving small size, low cost components having good microwave performance. In particular, the new multilayer approach has been shown to overcome the problem of fabricating very small gaps between coupled lines in a traditional single layer structure.
Perissosoma Waterhouse 1875
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Perissosoma

description: Perissosoma Waterhouse, 1875b
[3 species].
Type species Perissosoma aenescens Waterhouse, 1875, 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 126, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437