cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Giant Zeeman splitting of light holes in GaAs/AlGaAs quantum wells
Creators: name: Durnev, M. V.
name: Glazov, M. M.
name: Ivchenko, E. L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have developed a theory of the longitudinal $g$ factor of light holes in semiconductor quantum wells. It is shown that the absolute value of the light-hole $g$-factor can strongly exceed its value in the bulk and, moreover, the dependence of the Zeeman splitting on magnetic field becomes non-linear in relatively low fields. These effects are determined by the proximity of the ground light-hole subband, $lh1$, to the first excited heavy-hole subband, $hh2$, in GaAs/AlGaAs-type structures. The particular calculations are performed in the framework of Luttinger Hamiltonian taking into account both the magnetic field-induced mixing of $lh1$ and $hh2$ states and the mixing of these states at heterointerfaces, the latter caused by chemical bonds anisotropy. A theory of magneto-induced reflection and transmission of light through the quantum wells for the light-hole-to-electron absorption edge is also presented.
description: 7 pages, 3 figures, 1 table
Transferring Update Behavior from Smartphones to Smart Consumer Devices
Creators: name: Fassl, Matthias
name: Michaela.Neumayr
name: Schedler, Oliver
name: Krombholz, Katharina
Publisher: name: CISPA
Year: 2023

description: Automatic updates are becoming increasingly common, which minimizes the amount of update decisions that users have to make. Rapidly deployed important updates have a major impact on security. However, automatic updates also reduce the users' opportunities to build useful mental models which makes decision-making harder on other consumer devices without automatic updates. Users generally transfer their understanding from domains that they know well (i.e., smartphones) to others. We investigate how well this transfer process works with respect to updates and if users with automatic updates fare worse than those with manual updates. We conducted a formative field study (N = 5$) to observe users' update settings on smartphones and examine reasons for their (de-)activation. Based on the results, we conducted an online survey (N = 91) to compare how users perceive update notifications for smartphones and smart consumer devices. One of our main findings is that update decisions based on expected changes do not apply well to these devices since participants do not expect meaningful and visual changes. We suggest naming updates for such devices 'maintenance' to move users' expectations from 'new features' to 'ensuring future functionality'.
Three new labdane-type diterpenoids from Callicarpa macrophylla Vahl.
Creators: name: Wang, Zhen-Hui
name: Xu, Huan-Jun
name: Zhai, Yang-Yang
name: Yang, Lan-Ping
name: Li, Qiang
name: Huang, Mei
name: Chen, Xing-Ying
name: Zhang, Wen-Kui
name: Meng, Yue-Li
name: Zhang, Qing-Ling
name: Niu, Chao
name: Zhang, Yan-Ru
Publisher: name: Taylor & Francis
Year: 2018
Subjects: Biochemistry
Physical Sciences not elsewhere classified
Cell Biology
Pharmacology
Environmental Sciences not elsewhere classified
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Cancer
Hematology

description: Three new labdane-type diterpenoids, callicapene M3-M5 (1–3) were isolated from the Callicarpa macrophylla Vahl. Their structures were identified by spectroscopic method. The isolated compounds were evaluated for inhibitory activity on NO production in LPS-activated RAW 264.7 macrophage cells by using MTT assays. Compounds 1–3 showed potent inhibitory activity, with IC50 value of 48.15, 46.31 and 38.72 μM respectively.
On a theorem of G. D. Chakerian
Creators: name: Spirova, Margarita
Publisher: name: Faculty of Science, University of Calgary
Year: 2010

description: Among all bodies of constant width in the Euclidean plane, a Reuleaux triangle of width $\lambda$ has minimal area. But Reuleaux triangles are also minimal in another sense: if a convex body can be covered by a translate of any Reuleaux triangle, then it can be covered by a translate of any convex body of the same constant width. The first result is known as the Blaschke-Lebesgue theorem, and it is extended to an arbitrary normed plane in [19] and [5].  In the present paper we extend the second minimal property, known as Chakerian’s theorem, to all normed planes. Some corollaries from this generalization are also given.
description: Contributions to Discrete Mathematics, Vol 5, No 1 (2010)
Insights into the Icelandic Energy Market
Creators: name: Holdmann, Gwen
Publisher: name: Zenodo
Year: 2023

description: This paper represents our best effort to characterize the Icelandic energy market in its relevance to the Alaska Railbelt Grid. Our sources encompass a wide range of historical and contemporary materials, including regulatory filings, published works, and insightful discussions with key stakeholders within the Icelandic energy sector. As we gather additional insights, respond to questions from stakeholders in Alaska, or acquire clarifying information, we are committed to continuing to update this document. Responses to specific questions are included in Appendix C.
Studies in Fe bioavailability : co-limitation of primary productivity by iron, light, and nitrate in the Beaufort Sea, and direct iron-siderophore uptake mechanisms in Fe deficient phytoplankton
Creators: name: Taylor, Rebecca Lynn
Publisher: name: University of British Columbia
Year: 2011

description: This study explores two relevant questions in the realm of iron (Fe) bioavailability to phytoplankton. First, does Fe availability limit (or co-limit) growth of indigenous plankton communities in the Arctic Ocean? Second, can phytoplankton internalize ferrated siderophores with a non-reductive uptake mechanism? To address the first question, an 8-day grow out experiment was conducted in the Beaufort Sea in early September 2009, during which light, Fe, and nitrate (NO₃⁻) levels were manipulated. Bottles were sampled on days 0, 2, 4, 6, and 8 for accessory pigments, size-fractionated chlorophyll α, phytoplankton abundance and composition, nutrients, Fe quotas and uptake rates. It was found that NO₃⁻ was limiting plankton growth at the time of sampling. The community also appeared to be light limited. Additionally, co-limitation of primary production by Fe and light at light levels ≤ 10 % surface irradiance (I₀) was observed. These results have interesting implications about how the seasonality of NO₃⁻, light, and Fe availability may control primary productivity in the Beaufort Sea. To address the second question, I investigated the potential of a non-reductive Fe uptake mechanism for siderophore-bound Fe in the model diatom Thalassiosira oceanica and the in situ plankton communities along Line P in the subarctic Pacific Ocean in late summer 2010. To do this, we radiolabeled the siderophore desferrioxamine B (DFB) by methylating its terminal amine group with radioisotope ¹⁴C methyl iodide. Internalization of ⁵⁵Fe¹⁴DFB was observed both in phytoplankton cultures and field communities along Line P, suggesting the presence of a non-reductive Fe uptake mechanism in phytoplankton. However, the results are inconclusive due to the inability to purify and verify the concentration of ¹⁴DFB. The overarching goal of this investigation was to gain a better understanding on the bioavailability and acquisition of Fe by phytoplankton. This is imperative in order to predict the role of Fe in future primary productivity, and subsequently the fate of phytoplankton communities and the biological carbon pump, as our oceans respond to global warming.
Electric and magnetic charges in N=2 conformal supergravity theories
Creators: name: de Wit, Bernard
name: van Zalk, Maaike
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: General Lagrangians are constructed for N=2 conformal supergravity theories in four space-time dimensions involving gauge groups with abelian and/or non-abelian electric and magnetic charges. The charges are encoded in the gauge group embedding tensor. The scalar potential induced by the gauge interactions is quadratic in this tensor, and, when the embedding tensor is treated as a spurionic quantity, it is formally covariant with respect to electric/magnetic duality. This work establishes a general framework for studying any deformation induced by gauge interactions of matter-coupled N=2 supergravity theories. As an application, full and residual supersymmetry realizations in maximally symmetric space-times are reviewed. Furthermore, a general classification is presented of supersymmetric solutions in $\mathrm{AdS}_2\times S^2$ space-times. As it turns out, these solutions allow either eight or four supersymmetries. With four supersymmetries, the spinorial parameters are Killing spinors of $\mathrm{AdS}_2$ that are constant on $S^2$, so that they carry no spin, while the bosonic background is rotationally invariant.
description: 49 pages, typos corrected
title: Frequency Selective Optoelectronic Downconversion of a Terahertz Pulse Using ErAs:In(Al)GaAs Photoconductors
Creators: name: Fernandez Olvera, Anuar de Jesus
name: Krause, Benedikt Leander
name: Betancur-Perez, Andres
name: Nandi, Uttam
name: Dios, Cristina de
name: Acedo, Pablo
name: Preu, Sascha
Publisher: name: IEEE
Year: 2021

description: We introduce a new scheme for the detection of terahertz pulses based on the frequency selective optoelectronic downconversion of its individual modes with a continous-wave (CW) ErAs:InGaAs photoconductive antenna (PCA) driven by a comb-based CW photonic signal. The detection scheme can be used as metrology tool for the analysis of the fundamental resolution and stability limits of terahertz pulses and the mode-locked-lasers (MLLs) that drives them, as well as an ultra-high-resolution measurement technique for terahertz components or gas spectroscopy. We demonstrate both applications by measuring the linewidth of two frequency components of the particular terahertz pulse analyzed here (one at 75 GHz and one at 340 GHz) and by measuring a very narrowband filter between 70 and 80 GHz. The main advantage of this technique with respect to other terahertz pulse detection schemes is its capability of performing ultra-high-resolution measurements without the need of unpractically long scanning ranges or synchronization of two MLLs.
Electron-phonon Coupling on the Surface of the Topological Insulator Bi2Se3: Determined from Surface Phonon Dispersion Measurements
Creators: name: Zhu, Xuetao
name: Santos, Luiz
name: Howard, Colin
name: Sankar, R.
name: Chou, Fangcheng
name: Chamon, Claudio
name: El-Batanouny, Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this letter we report measurements of the coupling between Dirac fermion quasiparticles (DFQs) and phonons on the (001) surface of the strong topological insulator Bi2Se3. While most contemporary investigations of this coupling have involved examining the temperature dependence of the DFQ self-energy via angle-resolved photoemission spectroscopy (ARPES) measurements, we employ inelastic helium atom scattering to explore, for the first time, this coupling from the phonon perspective. Using a Hilbert transform, we are able to obtain the imaginary part of the phonon self-energy associated with a dispersive surface phonon branch identified in our previous work [1] as having strong interactions with the DFQs. From this imaginary part of the self-energy we obtain a branch-specific electron-phonon coupling constant of 0.43, which is stronger than the values reported form the ARPES measurements.
Deletion constructions of symmetric 4-configurations. Part I.
Creators: name: Berman, Leah Wrenn
name: Grünbaum, Branko
Publisher: name: Faculty of Science, University of Calgary
Year: 2010

description: By deletion constructions we mean several methods of generation of new geometric configurations by the judicious deletion of certain points and lines, and introduction of other lines or points. A number of such procedures have recently been developed in a systematic way. We present here one family of such constructions, and will describe other families in the following parts.
description: Contributions to Discrete Mathematics, Vol 5, No 1 (2010)
The Integration of International Early Career Professors into the Canadian Teaching Culture: A Case Study of the Characteristics of Transformation in Teaching
Creators: name: El Khoury, Eliana
Publisher: name: Graduate Studies
Year: 2018
Subjects: subject: international professors
subject: early career professors
subject: transformation in teaching
subject: Educational Development
subject: transformation learning
subject: Education

description: The purpose of this study was to explore how international early career professors integrate into the teaching culture at a western Canadian university. The research used a qualitative case study design. Data were collected using seven methods: an online survey, one common interview, classroom observations followed by debrief interviews, document analysis, an inventory, an interview with the associate dean of teaching and learning of the respective faculty, and an interview with educational developers at the western Canadian university. The findings captured the characteristics of transformative learning of teaching demonstrated and reported by international early career professors. Further, the outcome of the research contributed to the creation of three frameworks that pertain to the format of the support needed for international early career professors, the content of the support and the steps needed at the multiple levels of a higher education institution.
On the universal rigidity of generic bar frameworks
Creators: name: Alfakih, Abdo Y.
Publisher: name: Faculty of Science, University of Calgary
Year: 2010

description: Let $V=\{1,\ldots,n\}$ be a finite set. An $r$-configuration is a mapping $p:V \rightarrow R^r$, where

$p^1,\ldots,p^n$ are not contained in a proper hyper-plane. A framework $G(p)$ in $R^r$ is an $r$-configuration together with a graph $G=(V,E)$ such that every two points corresponding to adjacent vertices of $G$ are constrained to stay the same distance apart. A framework $G(p)$ is said to be generic if all the coordinates of $p^1,\ldots, p^n$ are algebraically independent over the integers. A framework $G(p)$ in $R^r$ is said to be unique if there does not exist a framework $G(q)$ in $R^s$, for some $s$, $1 \leq s \leq n-1$, such that $||q^i-q^j||=||p^i-p^j||$ for all $(i,j) \in E$. In this paper we present a sufficient condition for a generic framework $G(p)$ to be unique, and we conjecture that this condition is also necessary. Connections with the closely related problems of global rigidity and dimensional rigidity are also discussed.
description: Contributions to Discrete Mathematics, Vol 5, No 1 (2010)
Generalized CPR-graphs and applications
Creators: name: Pellicer, Daniel
name: Weiss, Asia Ivić
Publisher: name: Faculty of Science, University of Calgary
Year: 2010

description: We give conditions for oriented labeled graphs that must be satisfied in

order that such are permutations representations for groups of

automorphisms of chiral or orientably regular polytopes. We develop a

technique for construction of highly symmetric polytopes using such

graphs. In particular, we construct chiral polytopes with the

automorphism group $S_n$ for each $n>5$, an infinite family of finite chiral

polytopes of rank $4$, a polytope of rank $5$, as well as several infinite chiral polyhedra.
description: Contributions to Discrete Mathematics, Vol 5, No 2 (2010)
Experimental demonstration of topological error correction
Creators: name: Yao, Xing-Can
name: Wang, Tian-Xiong
name: Chen, Hao-Ze
name: Gao, Wei-Bo
name: Fowler, Austin G.
name: Raussendorf, Robert
name: Chen, Zeng-Bing
name: Liu, Nai-Le
name: Lu, Chao-Yang
name: Deng, You-Jin
name: Chen, Yu-Ao
name: Pan, Jian-Wei
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Scalable quantum computing can only be achieved if qubits are manipulated fault-tolerantly. Topological error correction - a novel method which combines topological quantum computing and quantum error correction - possesses the highest known tolerable error rate for a local architecture. This scheme makes use of cluster states with topological properties and requires only nearest-neighbour interactions. Here we report the first experimental demonstration of topological error correction with an eight-photon cluster state. It is shown that a correlation can be protected against a single error on any qubit, and when all qubits are simultaneously subjected to errors with equal probability, the effective error rate can be significantly reduced. This demonstrates the viability of topological error correction. Our work represents the first experimental effort to achieve fault-tolerant quantum information processing by exploring the topological properties of quantum states.
description: 11 pages, 6 figures in main text. arXiv admin note: text overlap with arXiv:0905.1542
Chemical modeling of Infrared Dark Clouds: the Role of Surface Chemistry
Creators: name: Vasyunina, T.
name: Vasyunin, A. I.
name: Herbst, E.
name: Linz, H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We simulate the chemistry of infrared dark clouds (IRDCs) with a model in which the physical conditions are homogeneous and time-independent. The chemistry is solved as a function of time with three networks: one purely gas-phase, one that includes accretion and desorption, and one, the complete gas-grain network, that includes surface chemistry in addition. We compare our results with observed molecular abundances for two representative IRDCs -- IRDC013.90-1 and IRDC321.73-1 -- using the molecular species N$_2$H$^+$, HC$_3$N, HNC, HCO$^+$, HCN, C$_2$H, NH$_3$ and CS. IRDC013.90-1 is a cold IRDC, with a temperature below 20 K, while IRDC321.73-1 is somewhat warmer, in the range 20 - 30 K. We find that the complete gas-grain model fits the data very well, but that the goodness-of-fit is not sharply peaked at a particular temperature. Surface processes are important for the explanation of the high gas-phase abundance of N$_2$H$^+$ in IRDC321.73-1. The general success of the 0-D model in reproducing single-dish observations of our limited sample of 8 species shows that it is probably sufficient for an explanation of this type of data. To build and justify more complicated models, including spatial temperature and density structure, contraction, and heating, we require high-resolution interferometric data.
description: accepted for publication in ApJ
When Life Gives You Oranges: Detecting and Diagnosing Intermittent Job Failures at Mozilla
Creators: name: Lampel, Johannes
name: Just, Sascha
name: Apel, Sven
name: Zeller, Andreas
Publisher: name: CISPA
Year: 2023

description: Continuous delivery of cloud systems requires constant running of jobs (build processes, tests, etc.). One issue that plagues this continuous integration (CI) process are intermittent failures - non-deterministic, false alarms that do not result from a bug in the software or job specification, but rather from issues in the underlying infrastructure. At Mozilla, such intermittent failures are called oranges as a reference to the color of the build status indicator. As such intermittent failures disrupt CI and lead to failures, they erode the developers' trust in the jobs. We present a novel approach that automatically classifies failing jobs to determine whether job execution failures arise from an actual software bug or were caused by flakiness in the job (e.g., test) or the underlying infrastructure. For this purpose, we train classification models using job telemetry data to diagnose failure patterns involving features such as runtime, cpu load, operating system version, or specific platform with high precision. In an evaluation on a set of Mozilla CI jobs, our approach achieves precision scores of 73%, on average, across all data sets with some test suites achieving precision scores good enough for fully automated classification (i.e., precision scores of up to 100%), and recall scores of 82% on average (up to 94%).
Quasinormal modes of a massless charged scalar field on a small Reissner-Nordström-anti-de Sitter black hole
Creators: name: Uchikata, Nami
name: Yoshida, Shijun
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate quasinormal modes of a massless charged scalar field on a small Reissner-Nordström-anti-de Sitter (RN-AdS) black hole both with analytical and numerical approaches. In the analytical approach, by using the small black hole approximation (r_+ << L), we obtain the quasinormal mode frequencies in the limit of r_+/L -> 0, where r_+ and L stand for the black hole event horizon radius and the AdS scale, respectively. We then show that the small RN-AdS black hole is unstable if its quasinormal modes satisfy the superradiance condition and that the instability condition of the RN-AdS black hole in the limit of r_+/L -> 0 is given by Q>(3/eL)Q_c, where Q, Q_c, and e are the charge of the black hole, the critical (maximum) charge of the black hole, and the charge of the scalar field, respectively. In the numerical approach, we calculate the quasinormal modes for the small RN-AdS black holes with r_+ << L and confirm that the RN-AdS black hole is unstable if its quasinormal modes satisfy the superradiance condition. Our numerical results show that the RN-AdS black holes with r_+ =0.2L, 0.1L, and 0.01L become unstable against scalar perturbations with eL=4 when the charge of the black hole satisfies Q > 0.8Q_c, 0.78Q_c, and 0.76Q_c, respectively.
description: 13 pages, 11 figures
On the Soundness of Infrastructure Adversaries
Creators: name: Dax, Alexander
name: Künnemann, Robert
Publisher: name: CISPA
Year: 2023

description: Companies and network operators perform risk assessment to inform policy-making, guide infrastructure investments or to comply with security standards such as ISO 27001. Due to the size and complexity of these networks, risk assessment techniques such as attack graphs or trees describe the attacker with a finite set of rules. This characterization of the attacker can easily miss attack vectors or overstate them, potentially leading to incorrect risk estimation. In this work, we propose the first methodology to justify a rule-based attacker model. Conceptually, we add another layer of abstraction on top of the symbolic model of cryptography, which reasons about protocols and abstracts cryptographic primitives. This new layer reasons about Internet-scale networks and abstracts protocols. We show, in general, how the soundness and completeness of a rule-based model can be ensured by verifying trace properties, linking soundness to safety properties and completeness to liveness properties. We then demonstrate the approach for a recently proposed threat model that quantifies the confidentiality of email communication on the Internet, including DNS, DNSSEC, and SMTP. Using off-the-shelf protocol verification tools, we discover two flaws in their threat model. After fixing them, we show that it provides symbolic soundness.
ОЦЕНКА ФУНКЦИОНАЛЬНОГО СОСТОЯНИЯ СЕРДЕЧНО-СОСУДИСТОЙ СИСТЕМЫ ПЯТИКЛАССНИКОВ ОБРАЗОВАТЕЛЬНЫХ ОРГАНИЗАЦИЙ РАЗНОГО ТИПА
Creators: name: Будук-Оол Лариса Кара-Саловна
name: Серен-Чимит Орлана Олеговна
Publisher: name: Вестник Тувинского государственного университета. Естественные и сельскохозяйственные науки
Year: 2020
Subjects: учащиеся; лицей-интернат; сердечно-сосудистая система; двойное произведение; вегетативный индекс; гемодинамика

description: С целью изучения функционального состояния сердечно-сосудистой системы проведено исследование основных показателей системы кровообращения у пятиклассников Тувинского республиканского лицея-интерната г. Кызыла и МБОУ СОШ № 2 г. Кызыла. Показано, что среднее значение таких показателей как ЧСС (частота сердечных сокращений), АД (артериальное давление), СОК (систолический объем крови) и МОК (минутный объем крови) пятиклассников обеих образовательных организаций не выходило за пределы возрастных норм. Оценка вегетативной регуляции по индексу Кердо показала во всех образовательных организациях, независимо от половой принадлежности, преобладание школьников с выраженной ваготонией. У школьников, независимо от типа обучения отмечено преобладание парасимпатического влияния в регуляции гемодинамики, что может указывать на наличие утомления в период обучения учащихся.
D+s production at central rapidity in pp collisions at 7 TeV with the ALICE experiment
Creators: name: Innocenti, Gian Michele
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present the preliminary pt differential cross section in pp collisions of the D+s meson measured in the mid-rapidity region of ALICE with an integrated luminosity of 4.8 nb^-1. The ratios between all the D meson preliminary pt differential cross sections measured in the ALICE experiment (D+s,D0,D+,D*+) are also presented and compared with the results of other experiments.
description: Presented at the 2011 Hadron Collider Physics symposium (HCP-2011), Paris, France, November 14-18 2011, 3 pages, 5 figure
Indirect Detection of Explosive Vapours by Thermal Dissociation Cavity Ring-Down Spectroscopy
Creators: name: Taha, Youssef Mohamad
Publisher: name: Graduate Studies
Year: 2018
Subjects: subject: Chemistry
subject: explosive
subject: CRDS
subject: cavity ring-down spectroscopy
subject: spectroscopy
subject: TATP
subject: TNT
subject: Education--Sciences
subject: Chemistry--Analytical
subject: Atmospheric Science

description: This thesis describes two explosive detection methods capable of detecting explosives indirectly in ambient air. The first of the explosive detection methods utilizes a platinum catalyst heated to 350 °C to catalyze the thermal dissociation of nitroaromatic explosives, such as 2,4,6 trinitrotolune (TNT), to NO2 prior to detection. The catalytic thermal dissociation (cTD) CRDS was found to have a (1s, 3σ) limit of detection (LOD) of 0.5 ppbv. The LOD was sufficient for the detection of TNT in ambient air but lacked the sensitivity to detect less volatile nitro aromatic explosives such as 2,4,6 trinitrophenylmethylnitramine (Tetryl). Efforts to improve the sensitivity of the instrument via a trap and purge pre-concentration scheme were of limited success largely due to poor sample recoveries from the Tenax traps used. The second explosive detection technique exploited radicals generated during the thermal decomposition of triacetone triperoxide (TATP), a peroxide explosive, for detection. These radicals were amplified via a peroxide radical chemical amplification scheme (PERCA) that required the addition of NO and a radical chain carrier, commonly CO, to generate NO2. A modelling study was conducted to assess alternative radical chain carriers as well as the effect of TD on amplification chemistry. Dimethyl ether and ethane were found to be appropriate chain carriers. Additionally, the modelling study suggested that elevated TD temperatures slow down radical chemistry and reduce chemical amplification (CL) while reducing the dependence of CL on relative humidity and radical sinks. A TD-PERCA-CRDS instrument was constructed and its temperature dependent chain length calibrated using peroxyacyl nitrates and peroxy nitric acid. The TD-PERCA-CRDS was found to have a CL up to 69±5 at 250 °C and an LOD (1s, 1σ) of 1.3 pptv. The instrument’s relative humidity dependence was reduced compared to that of room temperature PERCA but the instrument was found to suffer from an ozone interference at temperatures greater than 150 °C. A sample of TATP was synthesized in the lab and its identity and purity established using FTIR. TATP decomposition resulted in an NO2 signal that was 22±3 times larger than that expected from TATP saturation vapour pressure, and the LOD was 5 pptv.
Changing jellyfish populations : trends in large marine ecosystems
Creators: name: Brotz, Lucas
Publisher: name: University of British Columbia
Year: 2011

description: Although there are various indications and claims that jellyfish have been increasing at a global scale in recent decades, a rigorous demonstration to this effect has never been presented. As this is mainly due to scarcity of quantitative time series of jellyfish abundance from scientific surveys, an attempt is presented here to complement such data with non-conventional information from other sources. This was accomplished using the analytical framework of fuzzy logic, which allows the combination of information with variable degrees of cardinality, reliability, and temporal and spatial coverage. Data were aggregated and analysed at the scale of Large Marine Ecosystem (LME). Of the 66 LMEs defined thus far, which cover the world’s coastal waters and seas, trends of jellyfish abundance (increasing, decreasing, or stable/variable) were identified (occurring after 1950) for 45, with variable degrees of confidence. Of these 45 LMEs, the overwhelming majority (31 or 69%) showed increasing trends. Recent evidence also suggests that the observed increases in jellyfish populations may be due to the effects of human activities, such as overfishing, global warming, pollution, and coastal development. Changing jellyfish populations were tested for links with anthropogenic impacts at the LME scale, using a variety of indicators and a generalized additive model. Significant correlations were found with several indicators of ecosystem health, as well as marine aquaculture production, suggesting that the observed increases in jellyfish populations are indeed due to human activities and the continued degradation of the marine environment.
ВЛИЯНИЕ ФИЗИЧЕСКОЙ ПОДГОТОВЛЕННОСТИ СТУДЕНТОВ ТУВИНСКОГО ГОСУДАРСТВЕННОГО УНИВЕРСИТЕТА НА УРОВЕНЬ ЗДОРОВЬЯ
Creators: name: Красильникова Вера Александровна
Publisher: name: Вестник Тувинского государственного университета. Естественные и сельскохозяйственные науки
Year: 2020
Subjects: физическая подготовленность; уровни здоровья; студенты; кардиореспираторная система

description: В статье приводятся результаты исследований физической подготовленности и состояния физического здоровья студентов-первокурсников Тувинского государственного университета. Рассматривается взаимосвязь между физической подготовленностью и уровнем здоровья студенческой молодежи. Выявлены половые различия в развитии физических качеств и физической подготовленности исследуемых. Функциональные резервы дыхательной и сердечно-сосудистой системы указывают на неоднозначность функционального состояния разных студенческих групп. Интегральная оценка физического здоровья показала, что довольно обширная группа юношей и девушек находится в переходном состоянии между здоровьем и болезнью. В группах с высокой физической подготовленностью не выявлены представители с низким уровнем здоровья, что указывает на более высокие адаптационные возможности этой группы обследуемых. Связь физической подготовленности с уровнями здоровья в большей степени выражена у юношей.
Role of quantum fluctuations in a system with strong fields: Spectral properties and Thermalization
Creators: name: Epelbaum, T.
name: Gelis, F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In a previous work [arXiv:1009.4363], we have studied the evolution of a scalar field with a quartic coupling, driven by a classical source that initializes it to a non-perturbatively large value. At leading order in the coupling, the evolution of this system is given by classical solutions of the field equation of motion. However, this system is subject to a parametric resonance that leads to secular divergences in higher order corrections to physical observables. We have proposed a scheme that resums all the leading secular terms: this resummation leads to finite results at all times, and we have observed also that it makes the pressure tensor of the system relax to its equilibrium value. In the present paper, we continue the study of this system by looking at finer details of its dynamics. We first compute its spectral function at various stages of the evolution, and we observe that after a fairly short transient time there are well defined massive quasi-particles. We then consider the time evolution of the momentum distribution of these quasi-particles, and we show that after a stage dominated by the parametric resonance, this distribution slowly evolves to an equilibrium distribution. Interestingly, this distribution develops a transient chemical potential, signalling the fact that number changing processes are much slower than the elastic ones.
description: 36 pages, 19 figures, version to appear in Nucl. Phys. A
ЭФФЕКТИВНОСТЬ ГЕРБИЦИДОВ И ИХ БАКОВЫХ СМЕСЕЙ В ПОСЕВАХ ПШЕНИЦЫ ОЗИМОЙ
Creators: name: Коршунов Александр Петрович
name: Мавлютова Людмила Ивановна
name: Яшина Наталья Алексеевна
name: Иванушенков Игорь Анатольевич
name: Ручков Егор Романович
name: Меднов Александр Владимирович
name: Цымбалова Виталия Александровна
name: Ульдина Софья Викторовна
name: Абрамкина Людмила Пиркулыевна
name: Говоркова Светлана Борисовна
name: Калабашкина Елена Владимировна
Publisher: name: Вестник Тувинского государственного университета. Естественные и сельскохозяйственные науки
Year: 2020
Subjects: эффективность; пшеница мягкая озимая; противозлаковые гербициды; баковые смеси; Немчиновская 17; финансовый результат

description: На опытных полях ФИЦ «Немчиновка» нами изучено влияние гербицидов и их баковых смесей c Эстероном, КЭ на засоренность посевов и урожайность пшеницы мягкой озимой сорта Немчиновская 17. Рассмотрено восемь вариантов опрыскивания гербицидами и их баковыми смесями относительно контроля без обработок с целью выявления наиболее эффективного применения гербицидов. Эффективность противозлаковых гербицидов оценена по снижению количества сорных растений, повышению урожайности, оптимальными финансовыми затратами на обработку посевов и максимальным положительным финансовым результатом от опрыскивания. Метеорологические условия в период проведения опыта были близкие к среднемноголетним значениям. Обработка гербицидами была проведена однократно, в фазу кущения. Расход рабочего раствора на опрыскивание посевов – 300 л/га. Наиболее эффективным признано внесение баковой смеси Ластик Экстра, КЭ + Эстерон, КЭ в количестве 0,9 л/га и 0,6 л/га соответственно. В этом варианте произошло снижение численности злаковых растений к контролю на 95,7%, отмечено самое высокое повышение урожайности до 6,10 т/га, определены самые высокие финансовые затраты на опрыскивание 1887,12 рублей в расчете на 1 га, но они являются оптимальными относительно величины полученного финансового результата. Этот вариант обеспечил максимальный положительный финансовый результат 23612,88 рублей в расчете на 1 га. Также нами проведен экономический анализ опрыскивания, который подтвердил наибольшую эффективность баковой смеси Ластик Экстра, КЭ + Эстерон, КЭ по сравнению с другими вариантами обработок и контролем. Анализ показателей интенсивности использования ресурсов при проведении опрыскивания посевов гербицидами и их баковыми смесями также подтвердил наибольшую эффективность баковой смеси Ластик Экстра, КЭ + Эстерон, КЭ.
Double proximity effect in hybrid planar Superconductor-(Normal metal/Ferromagnet)-Superconductor structures
Creators: name: Golikova, Tatiana E.
name: Huebler, Florian
name: Beckmann, Detlef
name: Batov, Igor E.
name: Karminskaya, Tatiana Yu.
name: Kupriyanov, Mikhail Yu.
name: Golubov, Alexander A.
name: Ryazanov, Valery V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We have investigated the differential resistance of hybrid planar Al-(Cu/Fe)-Al submicron bridges at low temperatures and in weak magnetic fields. The structure consists of Cu/Fe-bilayer forming a bridge between two superconducting Al-electrodes. In superconducting state of Al-electrodes, we have observed a double-peak peculiarity in differential resistance of the S-(N/F)-S structures at a bias voltage corresponding to the minigap. We claim that this effect (the doubling of the minigap) is due to an electron spin polarization in the normal metal which is induced by the ferromagnet. We have demonstrated that the double-peak peculiarity is converted to a single peak at a coercive applied field corresponding to zero magnetization of the Fe-layer.
The search for N-e.c. graphs
Creators: name: Bonato, Anthony
Publisher: name: Faculty of Science, University of Calgary
Year: 2009

description: Almost all finite graphs have the $n$-e.c.\ adjacency property, although

until recently few explicit examples of such graphs were known. We survey

some recently discovered families of explicit finite $n$-e.c.\ graphs, and

present a new construction of strongly regular $n$-e.c.\ arising from affine

planes.
description: Contributions to Discrete Mathematics, Vol 4, No 1 (2009)
[Salmonella genetics] 1. Isolation of F-prime factors from Salmonella typhimurium by the use of recombination-deficient mutants.-- 2. A comparison of the characteristics associated with ultraviolet sensitivity in Salmonella typhimurium strains Lt-2 and
Creators: name: Schultz, Frances Caroline
Publisher: name: University of Calgary
Year: 1970
Subjects: subject: Salmonella
subject: Bacterial genetics

description: Bibliography: p. 62-66.
Results on permutations with distinct difference property
Creators: name: Bell, Jordan
name: Wang, Qiang
Publisher: name: Faculty of Science, University of Calgary
Year: 2009

description: We prove that for all odd primes $p$ and positive integers $\alpha

\geq 2$, a construction of Batten and Sane yields at least

$(p-1)^3/4$ permutations with a distinct difference property (DDP)

of $\{1,2,\ldots,p^\alpha-1\}$. This proves a conjecture of Batten

and Sane, that at least $(p-1)^2/2$ such permutations exist. We

also pose several research questions for DDP permutations.
description: Contributions to Discrete Mathematics, Vol 4, No 1 (2009)
Automating Seccomp Filter Generation for Linux Applications
Creators: name: Canella, Claudio
name: Werner, Mario
name: Gruss, Daniel
name: Schwarz, Michael
Publisher: name: CISPA
Year: 2023

description: Software vulnerabilities undermine the security of applications. By blocking unused functionality, the impact of potential exploits can be reduced. While seccomp provides a solution for filtering syscalls, it requires manual implementation of filter rules for each individual application. Recent work has investigated approaches to automate this task. However, as we show, these approaches make assumptions that are not necessary or require overly time-consuming analysis. In this paper, we propose Chestnut, an automated approach for generating strict syscall filters with lower requirements and limitations. Chestnut comprises two phases, with the first phase consisting of two static components, i.e., a compiler and a binary analyzer, that statically extract the used syscalls. The compiler-based approach of Chestnut is up to factor 73 faster than previous approaches with the same accuracy. On the binary level, our approach extends over previous ones by also applying to non-PIC binaries. An optional second phase of Chestnut is dynamic refinement to restrict the set of allowed syscalls further. We demonstrate that Chestnut on average blocks 302 syscalls (86.5 %) via the compiler and 288 (82.5 %) using the binary analysis on a set of 18 applications. Chestnut blocks the dangerous exec syscall in 50 % and 77.7 % of the tested applications using the compiler- and binary-based approach, respectively. For the tested applications, Chestnut blocks exploitation of more than 61 % of the 175 CVEs that target the kernel via syscalls.
АНАЛИЗ И ОПТИМИЗАЦИЯ РАЦИОНОВ ЛАКТИРУЮЩИХ КОРОВ
Creators: name: Скакулы Орынбасар
name: Николай Петрович Буряков
name: Баймуканов Айдар Дастанбекулы
name: Калмагамбетов Мурат Байтугелович
Publisher: name: Вестник Тувинского государственного университета. Естественные и сельскохозяйственные науки
Year: 2020
Subjects: сухое вещество
клетчатка
переваримый протеин
сочные корма
концентрированные корма
дойные коровы
рацион кормления
черно-пестрая порода
структура рациона.

description: Цель исследования анализ и оптимизация рациона высокопродуктивных дойных коров в условиях предгорной зоны Алматинской области. Исследования проведены по программе целевого финансирования Министерства сельского хозяйства Республики Казахстан «Трансферт и адаптация технологий по автоматизации технологических процессов производства продукции животноводства на базе модельных ферм от 100 коров» (Шифр ИРН BR 06349618) в июле 2020 года в условиях ИП «Садыков С» Талгарского района Алматинской области. На основании анализа полученных данных можно отметить, что структура рационов не соответствует научно обоснованным рекомендациям. Так, в рационах отсутствуют грубые корма, значительно завышено количество концентрированных кормов. В рационе высокопродуктивных коров отмечено недостаточное количество сырого (9,38%), переваримого (6,49%), расщепляемого протеина (15,35%) и в значительной степени нерасщепляемого протеина (55,11%). Анализ рационов лактирующих коров с удоем 26 кг показал, что содержание сырого, переваримого, нерасщепляемого протеина ниже нормы на 7,16%, 8,12% и 41% соответственно, а уровень расщепляемого протеина выше нормы на 14,7%. Во всех рационах лактирующих групп коров, отношение легкопереваримых углеводов к переваримому протеину ниже рекомендуемых норм на 40%,47%,48,7% и 62% соответственно.
qweqweqw
Creators: name: asdweqweqwe
name: Larsen, Lars Henrik
Publisher: name: Zenodo
Year: 2023

description: @article{Svabensky2023automated,
    author    = {\v{S}v\'{a}bensk\'{y}, Valdemar and Vykopal, Jan and \v{C}eleda, Pavel and Dovjak, J\'{a}n},
    title     = {{Automated Feedback for Participants of Hands-on Cybersecurity Training}},
    journal   = {Education and Information Technologies},
    publisher = {Springer},
    volume    = {},
    year      = {2023},
    issn      = {1360-2357},
    url       = {},
    doi       = {},
}
Inhibitory effects of Dulcitol on rat C6 glioma by regulating autophagy pathway
Creators: name: Zhang, Yuling
name: Wang, Hui
name: Li, Fangjuan
name: Xu, Xinxin
name: Chen, Baogui
name: Zhang, Tao
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Hematology

description: In the study, we treated C6 rat glioma cells with 25 mg/ml Dulcitol for 24 h. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assays were used to detect cellular growth. The measurements of the superoxide dismutase (SOD), malondialdehyde (MDA) and catalase (CAT) were used to assess oxidative stress level. Western was performed to detect the autophagy and apoptosis expression. The data showed that Dulcitol significantly decreased the cell viability, upregulated the Bax level in mitochondria and the Cytochrome C level in cytoplasm, and downregulated anti-apoptotic protein Bcl-xl. Moreover, it enhanced MDA level, reduced CAT and SOD activities, decreased LC3-II/LC3-I ratio, and increased P62 expression. However, rapamycin increased autophagy level and cell viability, and decreased ROS in Dulcitol treated C6 cells. Moreover, Dulcitol inhibited the glioma growth and enhanced survival in vivo. These results suggest that Dulcitol evidently increase cellular ROS levels and apoptosis in glioma cells, which can be significantly regulated by autophagy.
Calcium Regulation of a Slow AHP in Hippocampal Pyramidal Cells
Creators: name: Miclat, Jason
Publisher: name: Cumming School of Medicine
Year: 2018
Subjects: subject: slow afterhyperpolarization
subject: hippocampus
subject: CA1
subject: hippocalcin
subject: calmodulin
subject: KCa3.1
subject: KCNQ
subject: Neuroscience

description: A slow afterhyperpolarization (sAHP) in CA1 hippocampal pyramidal cells is calcium-dependent and involves activation of KCa3.1 and KCNQ potassium channels. Both KCa3.1 and KCNQ channels bind calmodulin (CaM) as a calcium sensor, with an additional role proposed for the protein hippocalcin. We measured the calcium sensitivity of the IsAHP and potassium channel associations with CaM or hipppocalcin. In recordings in hippocampal tissue slices in vitro the KCa3.1-mediated IsAHP steadily increased over 10 min equilibration to 0 µM calcium electrolyte, but decreased upon infusing 1 µM calcium, while the KCNQ-mediated IsAHP responded in an opposite manner. KCa3.1 channels contributed to the IsAHP in rat but not mouse pyramidal cells. Coimmunoprecipitation occurred between KCa3.1 and both CaM and hippocalcin, but only KCNQ and CaM. These data reveal a species-specific expression pattern for two potassium channels and in calcium sensor proteins present to generate the sAHP in the same class of hippocampal neuron.
The sum-product phenomenon in arbitrary rings
Creators: name: Tao, Terence
Publisher: name: Faculty of Science, University of Calgary
Year: 2009

description: The \emph{sum-product phenomenon} predicts that a finite set $A$ in a ring $R$ should have either a large sumset $A+A$ or large product set $A \cdot A$ unless it is in some sense ``close'' to a finite subring of $R$.  This phenomenon has been analysed intensively for various specific rings, notably the reals $\R$ and cyclic groups $\Z/q\Z$.  In this paper we consider the problem in arbitrary rings $R$, which need not be commutative or contain a multiplicative identity.  We obtain rigorous formulations of the sum-product phenomenon in such rings in the case when $A$ encounters few zero-divisors of $R$.  As applications we recover (and generalise) several sum-product theorems already in the literature.
description: Contributions to Discrete Mathematics, Vol 4, No 2 (2009)
БИОХИМИЧЕСКИЙ ПРОФИЛЬ СЫВОРОТКИ КРОВИ МОЛОДНЯКА МОЛОЧНОГО СКОТА В УСЛОВИЯХ АДАПТИВНОЙ ТЕХНОЛОГИИ
Creators: name: Монгуш Саяна Даржааевна
name: Баймуканов Айдар Дастанбекулы
name: Чиндалиев Асхат Ербосынович
name: Семенов Владимир Григорьевич
name: Бекенов Даурен Маратович
Publisher: name: Вестник Тувинского государственного университета. Естественные и сельскохозяйственные науки
Year: 2020
Subjects: телята; направленное выращивание; индивидуальные домики; павильоны; адаптация; гематологические показатели; биохимические показатели; высокопродуктивное и здоровое стадо

description: В статье представлены результаты научно-исследовательской работы, проведенной в 2018-2020 гг. Экспериментальная часть работы была выполнена на молочно-товарной ферме УНПЦ «Байсерке-Агро» Талгарского района Алматинской области. Результаты исследований позволили выявить, что количество эритроцитов в крови телят первой и второй опытных групп было достоверно выше, чем в контроле, начиная с 30-суточного возраста и до конца периода выращивания. Установлено, что резервная щелочность плазмы крови у животных во всех группах в 1-е сутки после постановки опыта практически не менялась, в последующие сутки показатель варьировал, но имел тенденцию к повышению по мере взросления молодняка, и достигал пикового значения к концу периода выращивания. Также было установлено, что выращивание телят в индивидуальных домиках и групповых домиках на 2-3 и 7-9-е сутки жизни повышало уровень резервной щелочности их крови в периоды выращивания, доращивания и откорма, стимулируя буферные системы организма в условиях повышенных температур адаптивной технологии.