cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A study of the temperature gradients of gases flowing through heated porous metal
Creators: name: O'Meara, Donald John
name: Andrews, Clyde Cecil
Publisher: name: California Institute of Technology
Year: 1947
Subjects: Aeronautics
Aeronautical Engineering

description: Nitrogen and Hydrogen were passed through a pack of heated porous metal discs to obtain temperature distribution as a function of (1) mass flows and (2) temperatures at which metal was heated. An effort was made to obtain heat transfer per unit volume of porous metal as a function of (1) mass flows and (2) temperatures at which the metal was heated. By varying inlet gas pressures at various metal temperatures the effect of temperature on pressure drop was determined.

The results show that a cool gas flowing through a heated porous metal very quickly assumes the temperature of the metal. Heat transfer appears to increase linearly with mass flow up to a certain point above which the results were inconclusive. The variation of mass flow with pressure drop was determined to be linear for low pressure drop and to increase at a greater rate for higher pressure drops.
Combining Multiple Time Series Models Through A Robust Weighted Mechanism
Creators: name: Adhikari, Ratnadip
name: Agrawal, R. K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences
subject: 68T05

description: Improvement of time series forecasting accuracy through combining multiple models is an important as well as a dynamic area of research. As a result, various forecasts combination methods have been developed in literature. However, most of them are based on simple linear ensemble strategies and hence ignore the possible relationships between two or more participating models. In this paper, we propose a robust weighted nonlinear ensemble technique which considers the individual forecasts from different models as well as the correlations among them while combining. The proposed ensemble is constructed using three well-known forecasting models and is tested for three real-world time series. A comparison is made among the proposed scheme and three other widely used linear combination methods, in terms of the obtained forecast errors. This comparison shows that our ensemble scheme provides significantly lower forecast errors than each individual model as well as each of the four linear combination methods.
description: 6 pages, 3 figures, 2 tables, conference
STRATEGY FOR SUCCESSFUL START-UP LAUNCH IN THE RUSSIAN ECONOMY (WORK EXPERIENCE)
Creators: name: Andryushchenko Dmitry, V.
Publisher: name: Modern European Researches
Year: 2022
Subjects: START-UP
STARTUPPER
STRATEGY
BUSINESS-PERSON
INNOVATIVE BUSINESS
MARKETING
FINANCING
INVESTMENT
STARTUP TEAM

description: In the modern Russian economy, start-ups begin to play a significant role - young and ambitious companies aimed at the rapid implementation of a new idea in order to earn high profits. The economy of our country is being transformed and its innovative potential is increasing due to the development of the start-ups system. A successful startup needs not only a promising idea but a clearly structured strategy to implement an innovative idea, avoid possible risks, prevent errors, select a viable team of like-minded professionals, manage investments wisely, produce, sell or provide in-demand and competitive products and services. Having broad experience in the field of launching startups in Russia, we try to consistently examine each component of a competent strategy in this article so that businesspersons could use it and implement their innovative ideas in startups.
PROPER LAWSUIT NOTIFICATION IN THE US AND THE UK IN THE ERA OF SANCTIONS
Creators: name: Butakova Yana, S.
Publisher: name: Modern European Researches
Year: 2022
Subjects: COURT NOTICES
NOTIFICATION OF THE DEFENDANT
INTERNATIONAL CIVIL PROCEDURE
PROPER LAWSUIT NOTIFICATION

description: The problem of proper notification of a foreign defendant is one of the most complex and urgent problems of international civil procedure. In the framework of this study, we will not separate the categories of proper and timely notification, but will study proper notification as a broader concept, including timely notification.
THE METHODOLOGY OF ORGANIZING STUDENTS' RESEARCH WORK ON THE EXAMPLE OF SOLVING THE TECHNICAL PROBLEM "SELECTION OF A STEERING DRIVE FOR AN AIRCRAFT STABILIZATION SYSTEM"
Creators: name: Vergazova Olga, B.
name: Korolev Evgeny, A.
name: Yakusheva Olga Yu.
Publisher: name: Modern European Researches
Year: 2022
Subjects: RESEARCH WORK OF STUDENTS
MATHEMATICAL TRAINING OF STUDENTS
STEERING DRIVES
STABILIZATION SYSTEM
METHOD OF STANDARD COEFFICIENTS

description: The relevance of the problem under study is due to the need to form, develop and improve students' skills in applying the theoretical knowledge gained from the course of higher mathematics, the studied mathematical methods to solving specific technical problems related to future professional work. One of these technical problems is the calculation of the necessary parameters for selecting the best steering drive. To solve the problem, students of the areas of training 11.05.01 “Radio-electronic systems and complexes” and 24.05.06 “Aircraft control systems” under the supervision of teachers used the method of standard coefficients. The students did the required calculations, analyzed the results obtained and formulated problems for the following studies. The need to form and develop the professional and mathematical culture of the future engineer is an important up-to-date task of higher professional education. The content of the article will be interesting for teachers and students.
On the Boundedness of Positive Solutions of the Reciprocal Max-Type Difference Equation $x_{n}=\max\left\{\frac{A^{1}_{n-1}}{x_{n-1}}, \frac{A^{2}_{n-1}}{x_{n-2}}, \ldots, \frac{A^{t}_{n-1}}{x_{n-t}}\right\}$ with Periodic Parameters
Creators: name: Cranston, Daniel W.
name: Kent, Candace M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We investigate the boundedness of positive solutions of the reciprocal max-type difference equation \[ x_{n}=\max\left\{\frac{A_{n-1}^{1}}{x_{n-1}}, \frac{A_{n-1}^{2}}{x_{n-2}}, \ldots, \frac{A_{n-1}^{t}}{x_{n-t}}\right\}, \ \ n=1, 2, \ldots, \] where, for each value of $i$, the sequence $\{A_{n}^{i}\}_{n=0}^{\infty}$ of positive numbers is periodic with period $p_{i}$. We give both sufficient conditions on the $p_{i}$'s for the boundedness of all solutions and sufficient conditions for all solutions to be unbounded. This work essentially complements the work by Biddell and Franke, who showed that as long as every positive solution of our equation is \emph{bounded}, then every positive solution is eventually periodic, thereby leaving open the question as to when solutions are bounded.
description: 18 pages
EXPERIMENTAL SETUP AND TESTING OF A VARIABLE VALVE ACTUATION ENABLED CAM-LESS NATURAL GAS ENGINE
Creators: name: Thomas, Doni Manuel
Publisher: name: Purdue University Graduate School
Year: 2022
Subjects: Automotive combustion and fuel engineering

description: A Cummins 6.7L natural gas engine enabled with VVA was installed in a research test cell at Purdue’s Ray Herrick Laboratories for experimental testing. The stock engine which was connected to an AC dynameter was mounted on a movable test bed outfitted with numerous sensors, a charge air cooler, and an external heat exchanger. In the engine control room, a few different systems were set up to run the dyno, collect data from the engine sensors, and monitor the safety apparatuses in the test cell. After the test cell setup was completed, an initial baseline testing was performed to compare the stock engine operation with the baseline engine data given in the Cummins fuel map. The testing was used to verify the engines stock functionality and troubleshoot some additional issues before setting the boundary conditions. Once the boundary conditions were set, a final stock engine testing was performed at rated to check for repeatability and verify stock engine operation following the engine modifications made to accommodate the VVA. Following the baseline testing, the VVA system was assembled on the standalone rig to verify its operation before mounting it on the engine. In order to run the natural gas valve profiles received from Cummins, the VVA controller gains were retuned and the LVDT sensors were calibrated so that the desired closing, opening and lift behaviors were achieved. After verifying the VVA’s functionality, the hardware was mounted on the engine for the VVA experimental testing. The initial VVA testing was focused on understanding the impacts of intake valve modulation on the gas exchange process. Based on previous simulation work, reductions in pumping work leading to better fuel economy is one expected outcome. Experimental testing data related to the engine performance and operation was used to compare each IVC case to the stock IVC timing. These results were also compared to the previous GT-Power work to identify any apparent trends. Future work includes using VVA to further improve efficiency in the part load region, and reduce knock at higher loads. Additionally, the incorporation of a laser based in-cylinder sensing system will help to optimize the capability of VVA.
Highly Skilled Chinese Immigrant Women’s Labour Market Marginalization in Canada: An Institutional Ethnography of Discursively Constructed Barriers
Creators: name: Wang, Chen
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2021
Subjects: Skilled migration
Economic immigrants
Chinese immigrant women
Labour market marginalization
Settlement services

description: Canada has been active in attracting highly-skilled, foreign-trained workers to overcome its labour shortage, facilitate its economic growth, and enhance its global competency. While promoting gender equality in the workplace and advancing women’s labour market participation are ongoing focuses of Canada’s attention, the arrival of an increased number of skilled immigrant women and their marginalized experiences in the Canadian labour market reflects a critical problem that the underuse of highly skilled immigrant women’s professional skills might be a loss for both Canada and individual immigrants. This research reveals the lived experience of highly skilled Chinese immigrant women in the Canadian labour market, and analyzes how the barriers to their career restoration were constructed. It adopts Seyla Benhabib’s weak version of postmodern feminist theory and Dorothy Smith’s Institutional Ethnography methodology. Based on interview data with 46 highly skilled Chinese immigrant women, this research identifies these immigrant women’s standpoint within the institutional arrangements and understands the barriers to their career restoration as discursively constructed outcomes. This research contends that the settlement services for new immigrants funded by the federal government fall short of meeting the particular needs of highly skilled immigrants who intend to find highly skilled jobs that match their qualifications. This research also makes recommendations for improving existing language training and employment-related settlement services in order to better assist highly skilled immigrants in using their skills to a larger extent.
A Herschel [CII] Galactic plane survey I: the global distribution of ISM gas components
Creators: name: Pineda, Jorge L.
name: Langer, William D.
name: Velusamy, Thangasamy
name: Goldsmith, Paul F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: [Abridged] The [CII] 158um line is an important tool for understanding the life cycle of interstellar matter. Ionized carbon is present in a variety of phases of the interstellar medium, including the diffuse ionized medium, warm and cold atomic clouds, clouds in transition from atomic to molecular, and dense and warm photon dominated regions (PDRs). The Galactic Observations of Terahertz C+ (GOTC+) project surveys the [CII] line over the entire Galactic disk with velocity-resolved observations using the Herschel/HIFI instrument. We present the first longitude-velocity maps of the [CII] emission for Galactic latitudes b=0deg, +-0.5deg, and +-1.0deg. [CII] emission is mostly associated with spiral arms, mainly emerging from Galactocentric distances between 4 and 10 kpc. We estimate that most of the observed [CII] emission is produced by dense PDRs (47%), with smaller contributions from CO-dark H2 gas (28%), cold atomic gas (21%), and ionized gas (4%). Atomic gas inside the Solar radius is mostly in the form of cold neutral medium (CNM), while the warm neutral medium (WNM) gas dominates the outer galaxy. The average fraction of CNM relative to total atomic gas is 43%. We find that the warm and diffuse CO-dark H2 is distributed over a larger range of Galactocentric distances (4-11 kpc) than the cold and dense H2 gas traced by 12CO and 13CO (4-8kpc). The fraction of CO-dark H2 to total H2 increases with Galactocentric distance, ranging from 20% at 4 kpc to 80% at 10 kpc. On average, CO-dark H2 accounts for 30% of the molecular mass of the Milky Way. When the CO-dark H2 component is included, the radial distribution of the CO-to-H2 conversion factor is steeper than that when only molecular gas traced by CO is considered. Most of the observed [CII] emission emerging from dense PDRs is associated with modest far-ultraviolet fields in the range chi0~1-30.
description: 28 pages, 30 figures, accepted for publication in A&A
Bak-Tang-Wiesenfeld Model in the Finite Range Random Link Lattice
Creators: name: Najafi, M. N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider the BTW model in random link lattices with finite range interaction (RLFRI). The degree distribution for nodes is considered to be uniform in the interval $(0,n_0)$. We numerically calculate the exponents of the distribution functions in terms of $(n_0,R)$ in which $R$ is the range of interactions. Dijkstra radius is utilized to calculate the fractal dimension of the avalanches. Our analysis shows that there is, at least one length scale ($r_0(n_0,R)$) in which the fractal dimension is changed. We find that for the scales smaller than $r_0(n_0,R)$, which is typically one decade, the fractal dimension is nearly independent of $n_0$ and $R$ and is equal to $1.4$, i.e. close to that of the BTW in the regular lattice ($1.25$). Using this fact and other analysis, we conclude that the BTW-type behaviors are dominant for small values of $n_0$ and $R$, whereas for large values of these parameters a new regime is seen in which the exponent of distribution function of avalanche masses is nearly $1.4$. We also numerically calculate the explicit form of the \textit{number of unstable nodes} (NUN) as a time dependent process and show that for regular lattice it is (up to a normalization) proportional to a one dimensional Weiner process and for RLFRI it acquires a drift term. Using this dynamical variable it is numerically shown that we can not continuously approach the regular lattice limit by decreasing $R$.
Short Time Compressive Creep in 75S-T6 and 25S-T6 Aluminum Alloy Short Columns
Creators: name: Thatcher, Roland Churchill
Publisher: name: California Institute of Technology
Year: 1952
Subjects: Aeronautical engineering
Aeronautics

description: The creep characteristics of some of the light metal alloys at high temperature and stress were investigated when subject to; (1) Tension, (2) Short Column Compression, (3) Long Column effect. The tension and long column aspects are covered in the theses of R. I. Kauffman and R. Gaibler respectively. This thesis concerns the short-time creep of short columns of 25S-T6 and 75S-T6 aluminum alloy, subjected to large compressive loads, and temperatures of 450°, 500°, and 550°F. The columns were circular in cross section, and had an effective slenderness ratio of 25.5.

It was found that 75S-T6 was superior to 25S-T6 at 450°F and, that at that temperature, 75S-T6 short columns could withstand a stress of 14,500 psi, however due to creep, failure occurred in approximately 45 seconds. At a temperature of 500°F, 25S-T6 was found to be superior, and withstood a stress of 11,000 psi for approximately 60 seconds before creep failure occurred. The load carrying ability of the two alloys was about the same at 550°F with both materials withstanding 8,000 psi for approximately 60 seconds.

It is commonly believed that aluminum alloys are of little value at temperatures as high as 550°F, however contrary to this belief, this investigation shows that short columns of the two alloys tested can carry a large compression load if the time of duration is short.
Slow-Roll Inflation Preceded by a Topological Defect Phase à la Chaplygin Gas
Creators: name: Bouhmadi-Lopez, Mariam
name: Chen, Pisin
name: Huang, Yu-Chien
name: Lin, Yu-Hsiang
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a simple toy model corresponding to a network of frustrated topological defects of domain walls or cosmic strings that exist previous to the standard slow-roll inflationary era of the universe. Such a network (i) can produce a slower inflationary era than that of the standard scenario if it corresponds to a network of frustrated domain walls or (ii) can induce a vanishing universal acceleration; i.e., the universe would expand at a constant speed, if it corresponds to a network of frustrated cosmic strings red. Those features are phenomenologically modeled by a Chaplygin gas that can interpolate between a network of frustrated topological defects and a de Sitter-like or a power-law inflationary era. We show that this scenario can alleviate the quadruple anomaly of the cosmic microwave background spectrum. Using the method of the Bogoliubov coefficients, we obtain the spectrum of the gravitational waves as would be measured today for the whole range of frequencies. We comment on the possible detection of this spectrum by the planned detectors like BBO and DECIGO.
description: 11 pages, 12 figures. RevTex4-1. Expanded discussion. Version accepted in PRD
title: Bacillus cereus bacteria in foodstuffs may cause gastrointestinal diseases: BfR Opinion No 048/2020 of 30 October 2020
Creators: name: Bundesinstitut Für Risikobewertung
Publisher: name: Bundesbehörden und Einrichtungen im Geschäftsbereich des Bundesministeriums für Ernährung und Landwirtschaft (BMEL)
Year: 2020
Subjects: subject: 000

description: BfR-Stellungnahmen, vol. 2020, no. 048
Probing the Pulsar Origin of the Anomalous Positron Fraction with AMS-02 and Atmospheric Cherenkov Telescopes
Creators: name: Linden, Tim
name: Profumo, Stefano
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recent observations by PAMELA, Fermi-LAT, and AMS-02 have conclusively indicated a rise in the cosmic-ray positron fraction above 10 GeV, a feature which is impossible to mimic under the paradigm of secondary positron production with self-consistent Galactic cosmic-ray propagation models. A leading explanation for the rising positron fraction is an additional source of electron-positron pairs, for example one or more mature, energetic, and relatively nearby pulsars. We point out that any one of two well-known nearby pulsars, Geminga and Monogem, can satisfactorily provide enough positrons to reproduce AMS-02 observations. A smoking-gun signature of this scenario is an anisotropy in the arrival direction of the cosmic-ray electrons and positrons, which may be detectable by existing, or future, telescopes. The predicted anisotropy level is, at present, consistent with limits from Fermi-LAT and AMS-02. We argue that the large collecting area of Atmospheric Cherenkov Telescopes (ACTs) makes them optimal tools for detecting such an anisotropy. Specifically, we show that much of the proton and gamma-ray background, which affects measurements of the cosmic-ray electron-positron spectrum with ACTs, may be controlled in the search for anisotropies. We conclude that observations using archival ACT data could already constrain or substantiate the pulsar origin of the positron anomaly, while upcoming instruments (such as the Cherenkov Telescope Array) will provide strong constraints on the source of the rising positron fraction.
description: 9 pages, 2 figures, Version to Appear in the Astrophysical Journal
An investigation of ground accelerations produced by machines
Creators: name: Flygare, Richard W
Publisher: name: California Institute of Technology
Year: 1955
Subjects: Engineering and Applied Science

description: Machines with reciprocating or rotating parts initiate stress waves which propagate through the ground and produce measurable ground motions in the vicinity of the machines. In many respects these ground motions may be objectionable. Consequently it is desirable to have a body of precise information on the ground motion produced by various common machines.

Measurements of the ground acceleration produced by drop hammers, punch presses, railway trains, heavy automotive trucks, a cutting shear, a hydraulic press, and a pneumatic hammer were made. The vertical and two horizontal components of acceleration were measured at various distances from the source. The maximum ground acceleration component observed was 64.4 feet per second per second near a drop hammer. Ground accelerations as great as 1.6 feet per second per second were measured at a distance of one hundred feet from the source.

The influence of ground acceleration on equipment, on machines, and on human beings is largely dependent on the maximum value of the ground acceleration but also may be markedly influenced by the character of the ground motion. The detailed character of the ground acceleration varies widely with the different sources of the motion, with distance from the source, and with the geology of the transmitting medium. To cover this aspect of the problem sixty-two acceleration time records of the ground motion are reproduced in the thesis.
A novel conceptional approach for calculating the stability time related to converting the anticipated degradation from the curve of conductivity for flexible poly (vinyl chloride)
Creators: name: I.Al-Mosawi, Ali
Publisher: name: figshare
Year: 2022
Subjects: Polymers and plastics

description: The current study introduces a novel method for calculating the stability time by a new approach based on the conversion of degradation from the conductivity curve results obtained by the conventional method. The stability time calculated by the novel method is shorter than the time measured by the conventional method. The stability time in the novel method can be calculated by the endpoint of the tangency of the conversion curve with the tangent line. This point of tangency represents the stability time, as will be explained in detail. Still, it gives a clear and accurate envisage of the dehydrochlorination behavior and can be generalized to all types of polyvinyl chloride compared to the stability time measured by conventional ones based on measuring the conductivity which cannot be used to compare different compounds because PVC-based compounds may include varying amounts of PVC. As a result, the conventional method is inapplicable in all cases. For example, specific conductivity of 60 µS/cm indicates the same quantity of HCl but a different degradation grade. If this conventional approach is used alone, the results obtained will be inaccurate. Therefore, the novel method possesses greater sensitivity and accuracy for these differences in PVC-based compounds.
Heavy quark energy loss far from equilibrium in a strongly coupled collision
Creators: name: Chesler, Paul M.
name: Lekaveckas, Mindaugas
name: Rajagopal, Krishna
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We compute and study the drag force acting on a heavy quark propagating through the matter produced in the collision of two sheets of energy in a strongly coupled gauge theory that can be analyzed holographically. Although this matter is initially far from equilibrium, we find that the equilibrium expression for heavy quark energy loss in a homogeneous strongly coupled plasma with the same instantaneous energy density or pressure as that at the location of the quark describes many qualitative features of our results. One interesting exception is that there is a time delay after the initial collision before the heavy quark energy loss becomes significant. At later times, once a liquid plasma described by viscous hydrodynamics has formed, expressions based upon assuming instantaneous homogeneity and equilibrium provide a semi-quantitative description of our results - as long as the rapidity of the heavy quark is not too large. For a heavy quark with large rapidity, the gradients in the velocity of the hydrodynamic fluid result in qualitative consequences for the 'drag' force acting on the quark. In certain circumstances, the force required to drag the quark through the plasma can point opposite to the velocity of the quark, meaning that the force that the plasma exerts on a quark moving through it acts in the same direction as its velocity. And, generically, the force includes a component perpendicular to the direction of motion of the quark. Our results support a straightforward approach to modeling the drag on, and energy loss of, heavy quarks with modest rapidity in heavy ion collisions, both before and after the quark-gluon plasma hydrodynamizes, and provide cautionary lessons at higher rapidity.
description: 22 pages, 20 figures
10.14382_epitoanyag-jsbcm.2022.28.pdf
Creators: name: I.Al-Mosawi, Ali
Publisher: name: figshare
Year: 2022
Subjects: Polymers and plastics

description: The current study introduces a novel method for calculating the stability time by a new approach based on the conversion of degradation from the conductivity curve results obtained by the conventional method. The stability time calculated by the novel method is shorter than the time measured by the conventional method. The stability time in the novel method can be calculated by the endpoint of the tangency of the conversion curve with the tangent line. This point of tangency represents the stability time, as will be explained in detail. Still, it gives a clear and accurate envisage of the dehydrochlorination behavior and can be generalized to all types of polyvinyl chloride compared to the stability time measured by conventional ones based on measuring the conductivity which cannot be used to compare different compounds because PVC-based compounds may include varying amounts of PVC. As a result, the conventional method is inapplicable in all cases. For example, specific conductivity of 60 µS/cm indicates the same quantity of HCl but a different degradation grade. If this conventional approach is used alone, the results obtained will be inaccurate. Therefore, the novel method possesses greater sensitivity and accuracy for these differences in PVC-based compounds.
The Snapshot Hubble U-Band Cluster Survey (SHUCS). I. Survey Description and First Application to the Mixed Star Cluster Population of NGC 4041
Creators: name: Konstantopoulos, I. S.
name: Smith, L. J.
name: Adamo, A.
name: Silva-Villa, E.
name: Gallagher, J. S.
name: Bastian, N.
name: Ryon, J.
name: Westmoquette, M. S.
name: Zackrisson, E.
name: Larsen, S. S.
name: Weisz, D. R.
name: Charlton, J. C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the Snapshot Hubble U-band Cluster Survey (SHUCS), a project aimed at characterizing the star cluster populations of ten nearby galaxies (d<23 Mpc, half within 12 Mpc) through new F336W (U band equivalent) imaging from WFC3, and archival BVI-equivalent data with HST. Completing the UBVI baseline reduces the age-extinction degeneracy of optical colours, thus enabling the measurement of reliable ages and masses for the thousands of clusters covered by our survey. The sample consists chiefly of face-on spiral galaxies at low inclination, in various degrees of isolation (isolated, in group, merging), and includes two AGN hosts. This first paper outlines the survey itself, the observational datasets, the analysis methods, and presents a proof-of-concept study of the large-scale properties and star cluster population of NGC 4041, a massive SAbc galaxy at a distance of 23 Mpc, and part of a small grouping of six giant members. We resolve two structural components with distinct stellar populations, a morphology more akin to merging and interacting systems. We also find strong evidence of a truncated, Schechter-type mass function, and a similarly segmented luminosity function. These results indicate that binning must erase much of the substructure present in the mass and luminosity functions, and might account for the conflicting reports on the intrinsic shape of these functions in the literature. We also note a tidal feature in the outskirts of the galaxy in GALEX UV imaging, and follow it up with a comprehensive multi-wavelength study of NGC 4041 and its parent group. We deduce a minor merger as a likely cause of its segmented structure and the observed pattern of a radially decreasing star formation rate. We propose that combining the study of star cluster populations with broad-band metrics is not only advantageous, but often easily achievable through archival datasets.
description: Accepted for publication in the Astronomical Journal. 31 pages, 18 figures. Paper I in a series
HC-05 BLUETOOTH MODULI KO'RINISHI VA ISHLASH JARAYONI
Creators: name: Ochilov, M.R.
name: Ochilova, S.R.
name: Usmonov, Maxsud
name: Akhmatova, Durdona
Publisher: name: Zenodo
Year: 2024

description: Bluetooth protokoli qisqa masofalarga tez ma’lumotlarni uzatish uchun zarur. Ammo ko‘pincha u mikrokontrollerni yaqin masofadan boshqarish uchun loyihalarda qo‘llaniladi. Shunga ko‘ra, agar apparat komponenti smartfondagi ilova bilan to‘ldirilgan bo‘lsa, xuddi shunday aqlli uylarni qurish qulay bo‘ladi.
Edge function method applied to thin plates resting on Winkler foundation
Creators: name: Lam, Ignatius Po-cheung
Publisher: name: California Institute of Technology
Year: 1976
Subjects: subject: Civil Engineering
subject: FOS: Civil engineering

description: The Edge Function method formerly developed by Quinlan(25) is
applied to solve the problem of thin elastic plates resting on spring
supported foundations subjected to lateral loads the method can be
applied to plates of any convex polygonal shapes, however, since most
plates are rectangular in shape, this specific class is investigated in
this thesis. The method discussed can also be applied easily to other
kinds of foundation models (e.g. springs connected to each other by a
membrane) as long as the resulting differential equation is linear.
In chapter VII, solution of a specific problem is compared with a known
solution from literature. In chapter VIII, further comparisons are given.
The problems of concentrated load on an edge and later on a corner of a
plate as long as they are far away from other boundaries are also given
in the chapter and generalized to other loading intensities and/or plates
springs constants for Poisson's ratio equal to 0.2
Impact of accretion on the statistics of neutron star masses
Creators: name: Cheng, Z.
name: Taani, A.
name: Zhao, Y. H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We have collected the parameter of 38 neutron stars (NSs) in binary systems with spin periods and measured masses. By adopting the Boot-strap method, we reproduced the procedure of mass calculated for each system separately, to determine the truly mass distribution of the NS that obtained from observation. We also applied the Monte-Carlo simulation and introduce the characteristic spin period 20 ms, in order to distinguish between millisecond pulsars (MSPs) and less recycled pulsars. The mass distributions of MSPs and the less recycled pulsars could be fitted by a Gaussian function as $\rm 1.45\pm0.42 M_{\odot}$ and $\rm 1.31\pm0.17 M_{\odot} (\rm with ~ 1σ)$ respectively. As such, the MSP masses are heavier than those in less recycled systems by factor of $\rm \sim 0.13M_{\odot}$, since the accretion effect during the recycling process.
description: 2 pages, 2 figures
Harada-Tsutsui Gauge Recovery Procedure: From Abelian Gauge Anomalies to the Stueckelberg Mechanism
Creators: name: Lima, Gabriel Di Lemos Santiago
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Physics (physics.gen-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Revisiting a path-integral procedure of recovering gauge invariance from anomalous effective actions developed by Harada and Tsutsui, it is shown that there are two ways to achieve gauge symmetry: one already presented by the authors, which is shown to preserve the anomaly in the sense of standard conservation law, and another one which is anomaly-free, preserving current conservation. It is also shown that the aplication of Harada-Tsutsui technique to other models which are not anomalous but do not exhibit gauge invariance allows the identification of the gauge invariant formulation of the Proca model, also done by the referred authors, with the Stueckelberg model, leading to the interpretation of the gauge invariant map as a generalization of the Stueckelberg mechanism.
description: 17 pages
Gravity effects on thick brane formation from scalar field dynamics
Creators: name: Andrianov, Alexander A.
name: Andrianov, Vladimir A.
name: Novikov, Oleg O.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The formation of a thick brane in five-dimen\-sional space-time is investigated when warp geometries of $AdS_5$ type are induced by scalar matter dynamics and triggered by a thin-brane defect. The scalar matter is taken to consist of two fields with $O(2)$ symmetric self interaction and with manifest $O(2)$ symmetry breaking by terms quadratic in fields. One of them serves as a thick brane formation mode around a kink background and another one is of a Higgs-field type which may develop a classical background as well. Scalar matter interacts with gravity in the minimal form and gravity effects on (quasi)localized scalar fluctuations are calculated with usage of gauge invariant variables suitable for perturbation expansion. The calculations are performed in the vicinity of the critical point of spontaneous breaking of the combined parity symmetry where a non-trivial v.e.v. of the Higgs-type scalar field is generated. The nonperturbative discontinuous gravitational effects in the mass spectrum of light localized scalar states are studied in the presence of a thin-brane defect. The thin brane with negative tension happens to be the most curious case when the singular barriers form a potential well with two infinitely tall walls and the discrete spectrum of localized states arises completely isolated from the bulk.
description: 15 pages, minor corrections, two-column EPJ-C style
An Adjustment of Thais during the COVID - 19 Pandemic: A Systematic Literature Review
Creators: name: Thanyalak Boonlue
Publisher: name: DR.KEN Institute of Academic Development and Promotion.
Year: 2022
Subjects: Adjustment
Thais
Covid – 19
Systematic Literature Review

description: Interdisciplinary Academic and Research Journal, 2, 6, 509-534
Opto-thermal analysis of a lightweighted mirror for solar telescope
Creators: name: Banyal, Ravinder K.
name: Ravindra, B.
name: Chatterjee, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this paper, an opto-thermal analysis of a moderately heated lightweighted solar telescope mirror is carried out using 3D finite element analysis (FEA). A physically realistic heat transfer model is developed to account for the radiative heating and energy exchange of the mirror with surroundings. The numerical simulations show the non-uniform temperature distribution and associated thermo-elastic distortions of the mirror blank clearly mimicking the underlying discrete geometry of the lightweighted substrate. The computed mechanical deformation data is analyzed with surface polynomials and the optical quality of the mirror is evaluated with the help of a ray-tracing software. The thermal print-through distortions are further shown to contribute to optical figure changes and mid-spatial frequency errors of the mirror surface. A comparative study presented for three commonly used substrate materials, namely, Zerodur, Pyrex and Silicon Carbide (SiC) is relevant to vast area of large optics requirements in ground and space applications.
description: Accepted for publication in Optics Express, 17 pages, 11 figures
On the kinetic theory of turbulence in plasmas
Creators: name: Wang, Shaojie
Publisher: name: arXiv
Year: 2012
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: From the nonlinear (NL) Vlasov equation, a NL turbulence scattering term is found to describe the stochastic dissipation on the time scale longer than the turbulence correlation time. The evolution of the plasma distribution is determined by the well-understood unperturbed motion of charged particles, with the effects of fluctuating part of fields described by the turbulence scattering term. In the new framework, one can identify various important physics, covering from the linear and quasilinear to the NL regime; in particular, the connections between the widely used Kadomtsev-Pogutse's equation and Frieman-Chen's equation. The NL scattering term indicates the Onsager symmetry relation of turbulent transport and a NL frequency or k spectrum shift of a resonantly excited wave.
Emissivity calculations for carbon monoxide
Creators: name: Ostrander, M. H.
Publisher: name: California Institute of Technology
Year: 1951
Subjects: Aeronautics

description: The purpose of this report is to utilize a sound theoretical formulation combined with the best available experimental data on integrated absorption and rotational line-width, for the calculation of emissivities of carbon monoxide at room temperatures under conditions where overlapping between rotational lines is negligibly small.

The results of the present investigation indicate that calculated emissivities of carbon monoxide at room temperature are in excellent agreement with empirically observed data published by Hottel and Ullrich. The theoretical dependence of emissivity upon optical density at low optical density and at room temperature has been shown to follow the experimental observations almost exactly. For low optical densities the calculated emissivity is found to be nearly proportional to the assumed rotational line-width, thus emphasizing the need for accurate line-width determinations at all temperatures. The calculated dependence of emissivity on rotational line-width permits the determination of emissivity not only as a function of temperature, total pressure, and optical density, but also as a function of concentration of optically inert gas. For numerical calculations of this type it is necessary to obtain experimental data for the dependence of rotational line-width on the concentration of non- emitting gases.

The present calculations supplement earlier theoretical emissivity calculations, which are valid only at elevated total pressures where extensive overlapping of rotational lines occurs. The range of pressures in which overlapping between rotational lines is neither extensive nor negligibly small has been considered only very briefly and requires further examination.
Sequential testing over multiple stages and performance analysis of data fusion
Creators: name: Thakur, Gaurav
Publisher: name: arXiv
Year: 2013
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We describe a methodology for modeling the performance of decision-level data fusion between different sensor configurations, implemented as part of the JIEDDO Analytic Decision Engine (JADE). We first discuss a Bayesian network formulation of classical probabilistic data fusion, which allows elementary fusion structures to be stacked and analyzed efficiently. We then present an extension of the Wald sequential test for combining the outputs of the Bayesian network over time. We discuss an algorithm to compute its performance statistics and illustrate the approach on some examples. This variant of the sequential test involves multiple, distinct stages, where the evidence accumulated from each stage is carried over into the next one, and is motivated by a need to keep certain sensors in the network inactive unless triggered by other sensors.
description: SPIE Signal Processing, Sensor Fusion and Target Recognition XXII
In situ monitored vortex fluidic-mediated protein refolding/unfolding using an aggregation-induced emission bioprobe
Creators: name: Hu, Q
name: Hu, H
name: Zhang, X
name: Fan, K
name: Hong, Yuning
name: Raston, CL
name: Tang, Y
Publisher: name: La Trobe
Year: 2021
Subjects: Uncategorized

description: Protein folding is important for protein homeostasis/proteostasis in the human body. We have established the ability to manipulate protein unfolding/refolding for β-lactoglobulin using the induced mechanical energy in the thin film microfluidic vortex fluidic device (VFD) with monitoring as such using an aggregation-induced emission luminogen (AIEgen), TPE-MI. When denaturant (guanidine hydrochloride) is present with β-lactoglobulin, the VFD accelerates the denaturation reaction in a controlled way. Conversely, rapid renaturation of the unfolded protein occurs in the VFD in the absence of the denaturant. The novel TPE-MI reacts with exposed cysteine thiol when the protein unfolds, as established with an increase in fluorescence intensity. TPE-MI provides an easy and accurate way to monitor the protein folding, with comparable results established using conventional circular dichroism. The controlled VFD-mediated protein folding coupled with in situ bioprobe AIEgen monitoring is a viable methodology for studying the denaturing of proteins.
Applications of the two-variable expansion procedure to problems in celestial mechanics
Creators: name: Simmons, Jerry Lee
Publisher: name: California Institute of Technology
Year: 1962
Subjects: Aeronautics

description: This work illustrates the application of the two-variable expansion procedure of reference 1 to the solution of two representative problems in celestial mechanics.

The expansion procedure is applied first to the problem of aerodynamic perturbations of a satellite orbit. The case of planar motion is considered with both lift and drag perturbations acting on the satellite. A simplified model of the earth is used, but the motion is expected to exhibit a similar qualitative behavior in the more general case. It is found that the effect of drag causes the satellite to spiral toward the center of attraction while the orbit is tending to become circular. The effect of lift, to the order computed, is felt only by a slow advance of the apse.

The second application of the expansion procedure is to the problem of third-body perturbations of a satellite orbit. A special case of the restricted three-body problem is used in which the plane of the satellite's orbit is coincident with the orbital plane of the two larger bodies. The two-variable expansion is applied to approximate equations which are valid for satellite orbits close to the smaller of the two large bodies. The results are in exact agreement with those of reference 2 and DePontecoulant's lunar theory. The solution of this problem is to serve as a preliminary step in establishing the choice of variables for the more general case in which the satellite's orbit has a high inclination to the orbital plane of the two larger bodies.
Sandwiched Rényi Divergence Satisfies Data Processing Inequality
Creators: name: Beigi, Salman
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Sandwiched (quantum) $α$-Rényi divergence has been recently defined in the independent works of Wilde et al. (arXiv:1306.1586) and Müller-Lennert et al (arXiv:1306.3142v1). This new quantum divergence has already found applications in quantum information theory. Here we further investigate properties of this new quantum divergence. In particular we show that sandwiched $α$-Rényi divergence satisfies the data processing inequality for all values of $α> 1$. Moreover we prove that $α$-Holevo information, a variant of Holevo information defined in terms of sandwiched $α$-Rényi divergence, is super-additive. Our results are based on Hölder's inequality, the Riesz-Thorin theorem and ideas from the theory of complex interpolation. We also employ Sion's minimax theorem.
description: 13 pages, title changed, fixed typos, results unchanged, to appear in J. Math. Phys
Supplementary Materials from Tracking the COVID-19 crisis with high-resolution transaction data
Creators: name: Carvalho, Vasco M.
name: Garcia, Juan R.
name: Hansen, Stephen
name: Ortiz, Álvaro
name: Rodrigo, Tomasa
name: Rodríguez Mora, José V.
name: Ruiz, Pep
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Health Care
subject: Diseases
subject: 111706 Epidemiology
subject: FOS: Health sciences
subject: 80707 Organisation of Information and Knowledge Resources
subject: FOS: Media and communications
subject: 80501 Distributed and Grid Systems
subject: FOS: Computer and information sciences

description: Replication Materials: Codes and Data (ZIP file)
Finite size source effects and the correlation of neutrino transition probabilities through supernova turbulence
Creators: name: Kneller, James P
name: Mauney, Alex W
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: (Abridged) The transition probabilities describing the evolution of a neutrino with a given energy along some ray through a turbulent supernova are random variates unique to each ray. If the source of the neutrinos were a point then all neutrinos of a given energy and emitted at the same time which were detected in some far off location would have seen the same turbulent profile therefore their transition probabilities would be exactly correlated. But if the source has a finite size then the profiles seen by neutrinos emitted from different points at the source will have seen different turbulence and the correlation of the transition probabilities will be reduced. In this paper we study the correlation of the neutrino transition probabilities through turbulent supernova profiles as a function of the separation between the emission points using an isotropic and an anisotropic power spectrum for the random field used to model the turbulence. The spectral features in the high density resonance mixing channel of the next Galactic supernova neutrino burst may be strongly obscured by large amplitude turbulence when it enters the signal due to the finite size of the source while the presence of features in the low density and non resonant mixing channels may persist, the exact amount depending upon the degree of anisotropy of the turbulence.