Добірка наукової літератури з теми "MIT Bag model"
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Статті в журналах з теми "MIT Bag model"
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Duck, Ian, and James Reed. "MIT bag model with chiral solitons." Physical Review D 33, no. 9 (May 1, 1986): 2679–87. http://dx.doi.org/10.1103/physrevd.33.2679.
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Jun, Jung-Hwan. "New aspects of MIT bag model." Il Nuovo Cimento A 106, no. 1 (January 1993): 101–11. http://dx.doi.org/10.1007/bf02771510.
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Weiss, C., and A. D. Jackson. "An MIT bag model on S3." Nuclear Physics A 547, no. 4 (September 1992): 551–75. http://dx.doi.org/10.1016/0375-9474(92)90651-y.
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Yuan, Feng. "Sivers function in the MIT bag model." Physics Letters B 575, no. 1-2 (November 2003): 45–54. http://dx.doi.org/10.1016/j.physletb.2003.09.052.
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Arrizabalaga, N., L. Le Treust, and N. Raymond. "Extension operator for the MIT Bag Model." Annales de la Faculté des sciences de Toulouse : Mathématiques 29, no. 1 (July 24, 2020): 135–47. http://dx.doi.org/10.5802/afst.1627.
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Iwasaki, M., N. Tanokami, and T. Nakai. "Excited baryons in the MIT bag model." Physics Letters B 314, no. 3-4 (September 1993): 391–96. http://dx.doi.org/10.1016/0370-2693(93)91255-l.
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Matías Astorga, Manuel A., and Gerardo Herrera Corral. "Pressure Distribution Inside Nucleons in a Tsallis-MIT Bag Model." Entropy 26, no. 3 (February 22, 2024): 183. http://dx.doi.org/10.3390/e26030183.
Повний текст джерелаАнотація:
We present a phenomenological framework based on the MIT bag model to estimate the pressure experienced by quarks and gluons inside nucleons. This is accomplished by implementing non-extensive Tsallis statistics for the two-component system. In this model of hadrons, the strong interaction generates correlations effectively described by the q-Tsallis parameter. The resulting hadron pressure exhibits general agreement with recent calculations derived from Lattice QCD. Additionally, we compared this pressure with data extracted from deep virtual Compton scattering experiments and gravitational form factor analyses. The extended bag model provides an alternative interpretation of bag pressure in terms of the q-Tsallis parameter. Consequently, the MIT bag model can be expressed without requiring the inclusion of the bag pressure parameter.
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Lavenda, B. H. "High temperature properties of the MIT bag model." Journal of Physics G: Nuclear and Particle Physics 34, no. 9 (August 14, 2007): 2045–51. http://dx.doi.org/10.1088/0954-3899/34/9/013.
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Sadzikowski, M., and K. Zalewski. "Isgur-Wise functions from the MIT bag model." Zeitschrift für Physik C Particles and Fields 59, no. 4 (December 1993): 677–81. http://dx.doi.org/10.1007/bf01562560.
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Savatier, F. "Deconfinement phase transition within the MIT bag model." Journal of Mathematical Physics 32, no. 10 (October 1991): 2666–75. http://dx.doi.org/10.1063/1.529108.
Повний текст джерелаДисертації з теми "MIT Bag model"
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Lagerkvist, Leo, and Filip Samuelsson. "The MIT bag-model : Glueball mass spectrum using the MIT bag-model." Thesis, KTH, Teoretisk fysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-167796.
Повний текст джерелаАнотація:
This thesis studies the MIT bag-model and derives important equations regarding this model. The masses of the hypothetical glueballs are determined using the MIT bag-model. Five different glueball masses are predicted and the lowest glueball mass is determined to be 0.961 GeV. This is in excellent agreement with similar predictions using the MIT bag-model. Lattice QCD and other nucleon models are compared to the MIT bag-model. Many recent studies using lattice QCD have found the lowest glueball mass to be Denna avhandling studerar MIT bagmodellen och härleder relevanta ekvationeri modellen. En massberäkning av de hypotetiska klisterbollarna görs med hjälp av MIT bagmodellen. Fem olika klistebollar beräknas och lägsta klistebollsmassan fåstill 0.961 GeV. Detta är i utmärkt överensstämmelse med liknande studier gjorda med MIT bagmodellen. Lattice QCD och andra nukleonmodeller jämförs med MIT bagmodellen. Många nya studier med lattice QCD har beräknat lägsta klisterbollsmassan till
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Rodionov, Evguenii N. "The MIT bag model in nuclear and particle physics /." Title page, contents, abstract and introduction only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phr692.pdf.
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Hazelton, William Donald. "Configuration mixing of quark states in nucleons and other baryons in the MIT bag model /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/9770.
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Flamencourt, Brice. "On some problems in spectral analysis, spin geometry and conformal geometry." Thesis, université Paris-Saclay, 2022. http://www.theses.fr/2022UPASM014.
Повний текст джерелаАнотація:
Cette thèse se divise en deux grandes parties. Dans la première, on s'intéresse à deux problèmes d'analyse spectrale portant sur la convergence des valeurs propres d'opérateurs à paramètres. D'une part, on considère l'opérateur de Schrödinger dans le plan, avec un potentiel singulier supporté par une courbe fermée Γ admettant un point de rebroussement. Ce potentiel s'écrit formellement −αδ(x−Γ), et l'on décrit le comportement du spectre de l'opérateur dans la limite α→∞. D'autre part, on étudie l'opérateur de Dirac qui apparaît dans le modèle MIT Bag, en le généralisant aux variétés spin. Lorsque le paramètre de masse de cet opérateur tend vers l'infini, on observe une convergence des valeurs propres. Dans la seconde partie, on discute différents problèmes de géométrie. On démontre tout d'abord des résultats de structure et de classification en dimension 3 pour une classe particulière de spineurs, appelés spineurs de Cauchy, qui apparaissent naturellement comme restrictions de spineurs parallèles à des hypersurfaces orientées de variétés spin. Enfin, on s'intéresse aux connexions de Weyl sur les variétés conformes. On définit les structures localement conformément produits (LCP) par la donnée d'une structure de Weyl fermée, non-exacte, non-plate et à holonomie réductible sur une variété conforme compacte. On analyse les variétés LCP afin d'initier une classificationThis thesis is divided into two main parts. In the first one, we focus on two problems of spectral analysis concerning the convergence of eigenvalues of operators with parameters. On the one hand, we consider the Schrödinger operator in the plane, with a singular potential supported by a closed curve Γ admitting a cusp. This potential is formally written −αδ(x−Γ), and we describe the behaviour of the spectrum of the operator as α→∞. On the other hand, we study the Dirac operator which appears in the MIT Bag model, by generalizing it from Euclidean spaces to spin manifolds. We observe a convergence of the eigenvalues of this operator when the mass parameter tends to infinity. In the second part, we discuss two different geometric problems. First, we prove structure and classification results in dimension 3 for a particular class of spinors, called Cauchy spinors, arising as restrictions of parallel spinors to oriented hypersurfaces of spin manifolds. Finally, we focus on Weyl connections on conformal manifolds. We define a locally conformally product (LCP) structure as a closed, non-exact, non-flat Weyl structure with reducible holonomy on a compact conformal manifold. We analyse the LCP manifolds in order to initiate a classification
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Zreik, Mahdi. "Spectral properties of Dirac operators on certain domains." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0085.
Повний текст джерелаАнотація:
Cette thèse se focalise sur l'étude spectrale des modèles de perturbations de l'opérateur de Dirac libre en dimensions 2 et 3.Le premier chapitre de cette thèse étudie la perturbation de l'opérateur de Dirac par une grande masse M, supportée sur un domaine. Notre objectif principal est d'établir, sous la condition d'une masse M suffisamment grande, la convergence de l'opérateur perturbé vers l'opérateur de Dirac avec la condition au bord MIT bag, au sens de la norme de la résolvante. Pour se faire, nous introduisons ce que nous appelons les opérateurs Poincaré-Steklov (PS) (comme un analogue des opérateurs Dirichlet-to-Neumann pour l'opérateur de Laplace) et les analysons d'un point de vue microlocal, afin de comprendre précisément le taux de convergence de la résolvante. D'une part, nous montrons que les opérateurs PS s'intègrent dans le cadre des opérateurs pseudodifférentiels et nous déterminons leurs symboles principaux. D'autre part, comme nous nous intéressons principalement aux grandes masses, nous traitons notre problème du point de vue semiclassique, où le paramètre semiclassique est h = M^{-1}. Enfin, en établissant une formule de Krein reliant la résolvante de l'opérateur perturbé à celle de l'opérateur MIT bag, et en utilisant les propriétés pseudodifférentielles des opérateurs PS combinées aux structures matricielles des symboles principaux, nous établissons la convergence requise avec un taux de convergence de O(M^{-1}.Dans le chapitre 2, nous définissons un voisinage tubulaire de la frontière d'un domaine régulier donné. Nous considérons la perturbation de l'opérateur de Dirac libre par une grande masse M, supportée dans ce voisinage d'épaisseur varepsilon:=M^{-1}. Notre objectif principal est d'étudier la convergence de l'opérateur de Dirac perturbé lorsque M tend vers l'infini. En comparaison avec la première partie, nous obtenons ici deux opérateurs limites MIT bag, qui agissent en dehors de la frontière. Il est intéressant de noter que le découplage de ces deux opérateurs MIT bag peut être considéré comme la version confinée de delta-interaction scalaire de Lorentz de l'opérateur de Dirac, supportée sur une surface fermée. La méthodologie suivie, comme au problème précédent, porte sur l'étude des propriétés pseudodifférentielles des opérateurs PS. Cependant, la nouveauté de ce problème réside dans le contrôle de ces opérateurs en suivant la dépendance du paramètre varepsilon, et par conséquent, dans la convergence lorsque varepsilon tend vers 0 et M tend vers l'infini. Avec ces ingrédients, nous prouvons que l'opérateur perturbé converge au sens de la norme de la résolvante vers l'opérateur de Dirac couplé à une delta-interaction scalaire de Lorentz.Dans le chapitre 3, nous généralisation une approximation de l'opérateur de Dirac tridimensionnel couplé à une combinaison singulière de delta-interactions électrostatiques et scalaires de Lorentz supportée sur une surface fermée, par un opérateur de Dirac avec un potentiel régulier localisé dans une couche mince contenant la surface. Dans les cas non-critiques et non-confinants, nous montrons que l'opérateur de Dirac perturbé régulier converge au sens de la résolvante forte vers la delta-interaction singulière de l'opérateur de Dirac.Dans le dernier chapitre, notre étude porte sur l'opérateur de Dirac bidimensionnel couplé à une delta-interaction électrostatique et scalaire de Lorentz. Nous traitons dans des espaces de Sobolev d'ordre un-demi l'auto-adjonction de certaines réalisations de ces opérateurs dans divers contextes de courbes. Le cas le plus important se présente lorsque les courbes considérées sont des polygones curvilignes. Sous certaines conditions sur les constantes de couplage, en utilisant la propriété de Fredholm de certains opérateurs intégraux de frontière, et en exploitant la forme explicite de la transformée de Cauchy sur des courbes non lisses, nous établissons l'auto-adjonction de l'opérateur perturbéThis thesis mainly focused on the spectral analysis of perturbation models of the free Dirac operator, in 2-D and 3-D space.The first chapter of this thesis examines perturbation of the Dirac operator by a large mass M, supported on a domain. Our main objective is to establish, under the condition of sufficiently large mass M, the convergence of the perturbed operator, towards the Dirac operator with the MIT bag condition, in the norm resolvent sense. To this end, we introduce what we refer to the Poincaré-Steklov (PS) operators (as an analogue of the Dirichlet-to-Neumann operators for the Laplace operator) and analyze them from the microlocal point of view, in order to understand precisely the convergence rate of the resolvent. On one hand, we show that the PS operators fit into the framework of pseudodifferential operators and we determine their principal symbols. On the other hand, since we are mainly concerned with large masses, we treat our problem from the semiclassical point of view, where the semiclassical parameter is h = M^{-1}. Finally, by establishing a Krein formula relating the resolvent of the perturbed operator to that of the MIT bag operator, and using the pseudodifferential properties of the PS operators combined with the matrix structures of the principal symbols, we establish the required convergence with a convergence rate of mathcal{O}(M^{-1}).In the second chapter, we define a tubular neighborhood of the boundary of a given regular domain. We consider perturbation of the free Dirac operator by a large mass M, within this neighborhood of thickness varepsilon:=M^{-1}. Our primary objective is to study the convergence of the perturbed Dirac operator when M tends to +infty. Comparing with the first part, we get here two MIT bag limit operators, which act outside the boundary. It's worth noting that the decoupling of these two MIT bag operators can be considered as the confining version of the Lorentz scalar delta interaction of Dirac operator, supported on a closed surface. The methodology followed, as in the previous problem study the pseudodifferential properties of Poincaré-Steklov operators. However, the novelty in this problem lies in the control of these operators by tracking the dependence on the parameter varepsilon, and consequently, in the convergence as varepsilon goes to 0 and M goes to +infty. With these ingredients, we prove that the perturbed operator converges in the norm resolvent sense to the Dirac operator coupled with Lorentz scalar delta-shell interaction.In the third chapter, we investigate the generalization of an approximation of the three-dimensional Dirac operator coupled with a singular combination of electrostatic and Lorentz scalar delta-interactions supported on a closed surface, by a Dirac operator with a regular potential localized in a thin layer containing the surface. In the non-critical and non-confining cases, we show that the regular perturbed Dirac operator converges in the strong resolvent sense to the singular delta-interaction of the Dirac operator. Moreover, we deduce that the coupling constants of the limit operator depend nonlinearly on those of the potential under consideration.In the last chapter, our study focuses on the two-dimensional Dirac operator coupled with the electrostatic and Lorentz scalar delta-interactions. We treat in low regularity Sobolev spaces (H^{1/2}) the self-adjointness of certain realizations of these operators in various curve settings. The most important case in this chapter arises when the curves under consideration are curvilinear polygons, with smooth, differentiable edges and without cusps. Under certain conditions on the coupling constants, using the Fredholm property of certain boundary integral operators, and exploiting the explicit form of the Cauchy transform on non-smooth curves, we achieve the self-adjointness of the perturbed operator
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Gibson, Jason. "Nano-Particles in Multi-Scale Composites and Ballistic Applications." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5745.
Повний текст джерелаАнотація:
Carbon nanotubes, graphene and nano sized core shell rubber particles have all been extensively researched for their capability to improve mechanical properties of thermoset resins. However, there has been a lack of research on their evaluation for energy absorption in high velocity impact scenarios, and the fundamental mechanics of their failure mechanisms during highly dynamic stress transfer through the matrix. This fundamental research is essential for laying the foundation for improvement in ballistic performance in composite armor. In hard armor applications, energy absorption is largely accomplished through delamination between plies of the composite laminate. This energy absorption is accomplished through two mechanisms. The first being the elongation of the fiber reinforcement contained in the resin matrix, and the second is the propagation of the crack in between the discreet fabric plies. This research aims to fundamentally study the energy absorption characteristics of various nano-particles as reinforcements in thermoset resin for high velocity impact applications. Multiple morphologies will be evaluated through use of platelet, tubular and spherical shaped nano-particles. Evaluations of the effect on stress transfer through the matrix due to the combination of nano sized and micro scale particles of milled fiber is conducted. Three different nano-particles are utilized, specifically, multi-walled carbon nanotubes, graphene, and core shell rubber particles. The difference in surface area, aspect ratio and molecular structure between the tube, platelet and spherical nano-particles causes energy absorption through different failure mechanisms. This changes the impact performance of composite panels enhanced with the nano-particle fillers. Composite panels made through the use of dispersing the various nano-particles in a non-contact planetary mixer, are evaluated through various dynamic and static testing, including unnotched cantilever beam impact, mixed mode fracture toughness, split-Hopkinson bar, and ballistic V50 testing. The unnotched cantilever beam testing showed that the addition of milled fiber degraded the impact resistance of the samples. Addition of graphene nano platelets unilaterally degraded impact resistance through the unnotched cantilever beam testing. 1.5% loading of MWCNT showed the greatest increase in impact resistance, with a 43% increase over baseline. Determining the critical load for mixed mode interlaminar shear testing can be difficult for composite panels that bend without breaking. An iterative technique of optimizing the coefficient of determination, R2, in linear regression is developed for objectively determining the point of non-linearity for critical load. This allows for a mathematical method of determination; thereby eliminating any subjective decision of choosing where the data becomes non-linear. The core shell rubber nano particles showed the greatest strain energy release rate with an exponential improvement over the baseline results. Synergistic effects between nano and micro sized particles in the resin matrix during transfer of the stress wave were created and evaluated. Loadings of 1% milled carbon fiber enhanced the V50 ballistic performance of both carbon nanotube and core shell rubber particles in the resin matrix. However, the addition of milled carbon fiber degrades the impact resistance of all nano-particle enhanced resin matrices. Therefore, benefits gained from the addition of micro-sized particles in combination with nano-sized particles, are only seen in high energy impact scenarios with micro second durations. Loadings of 1% core shell rubber particles and 1% milled carbon fiber have an improvement of 8% in V50 ballistic performance over the baseline epoxy sample for 44 mag single wad cutter gas check projectiles. Loadings of 1% multi-walled carbon nanotubes with 1% milled carbon fiber have an improvement of 7.3% in V50 ballistic performance over the baseline epoxy sample. The failure mechanism of the various nano-particle enhanced resin matrices during the ballistic event is discussed through the use of scanning electron microscope images and Raman spectroscopy of the panels after failure. The Raman spectroscopy data shows a Raman shift for the fibers that had an enhancement in the V50 performance through the use of nano-particles. The Raman band for Kevlar centered at 1,649 cm-1 stemming from the stretching of the C==O bond of the fiber shows to be more sensitive to the residual axial strain, while the Raman band centered at 1,611 cm-1 stemming from the C-C phenyl ring is minimally affected for the CSR enhanced panels due to the failure mechanism of the CSR particles during crack propagation.Ph.D.
Doctorate
Mechanical and Aerospace Engineering
Engineering and Computer Science
Mechanical Engineering
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Rodionov, E. N. "The MIT bag model in nuclear and particle physics / Evguenii N. Rodionov." Thesis, 1997. http://hdl.handle.net/2440/19039.
Повний текст джерелаАнотація:
Copies of author's earlier publications inserted.Bibliography: leaves 129-137.
137 leaves : ill. ; 30 cm.
The subject of this thesis is the application of the MIT bag model to nuclear and particle physics.
Thesis (Ph.D.)--University of Adelaide, Dept. of Physics and Mathematical Physics, 1997
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Rodionov, E. N. "The MIT bag model in nuclear and particle physics / Evguenii N. Rodionov." 1997. http://hdl.handle.net/2440/19039.
Повний текст джерелаАнотація:
Copies of author's earlier publications inserted.Bibliography: leaves 129-137.
137 leaves : ill. ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
The subject of this thesis is the application of the MIT bag model to nuclear and particle physics.
Thesis (Ph.D.)--University of Adelaide, Dept. of Physics and Mathematical Physics, 1997
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Maas, Bea. "Birds, bats and arthropods in tropical agroforestry landscapes: Functional diversity, multitrophic interactions and crop yield." Doctoral thesis, 2013. http://hdl.handle.net/11858/00-1735-0000-0022-5E77-5.
Повний текст джерелаКниги з теми "MIT Bag model"
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Varlamov, Oleg. Fundamentals of creating MIVAR expert systems. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1513119.
Повний текст джерелаАнотація:
Methodological and applied issues of the basics of creating knowledge bases and expert systems of logical artificial intelligence are considered. The software package "MIV Expert Systems Designer" (KESMI) Wi!Mi RAZUMATOR" (version 2.1), which is a convenient tool for the development of intelligent information systems. Examples of creating mivar expert systems and several laboratory works are given. The reader, having studied this tutorial, will be able to independently create expert systems based on KESMI.
The textbook in the field of training "Computer Science and Computer Engineering" is intended for students, bachelors, undergraduates, postgraduates studying artificial intelligence methods used in information processing and management systems, as well as for users and specialists who create mivar knowledge models, expert systems, automated control systems and decision support systems.
Keywords: cybernetics, artificial intelligence, mivar, mivar networks, databases, data models, expert system, intelligent systems, multidimensional open epistemological active network, MOGAN, MIPRA, KESMI, Wi!Mi, Razumator, knowledge bases, knowledge graphs, knowledge networks, Big knowledge, products, logical inference, decision support systems, decision-making systems, autonomous robots, recommendation systems, universal knowledge tools, expert system designers, logical artificial intelligence.
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1954-, Yin Tian, and Ren Zili 1971-, eds. Zhongguo cun min zi zhi dian fan mo ban ping xi: Lai zi Beijing, Shandong, Henan, Nei Menggu si sheng qu de shi zheng yan jiu = Analysis on model patterns of China's village self-governance. Beijing Shi: Fa lü chu ban she, 2005.
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Kemper, Kurt Edward. Before March Madness. University of Illinois Press, 2020. http://dx.doi.org/10.5622/illinois/9780252043260.001.0001.
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Before March Madness examines the power dynamics of mid-century college sports when their meaning in higher education was still uncertain, when their future in American culture was still undetermined, and when the ascendance, indeed the very survival, of the NCAA was not yet assured. The book identifies the institutional struggles of college athletics from the late 1930s to the late 1950s and the multiple stakeholders and varied interests contained therein, showing a complex, and often conflicting, view of both college sports and higher education. The NCAA’s insistence on defining college athletics solely within the big-time commercialized model opened itself to severe criticism from within the organization in the form of small liberal arts colleges, medium-size regional and state universities, and historically black colleges, as well as outside it with the creation of the NAIA. The organization, however, successfully used college basketball to both placate internal critics and stave off its external competitor. In doing so, the NCAA managed to create in the public’s mind a singular vision of college sports, often represented by college football, representing only the big-time commercialized model by creating a peace that was purchased through college basketball. The success of NCAA elites to co-opt, divide, and placate its insurgent critics mirrored the larger response of mid-twentieth-century political and economic elites in the face of unprecedented challenges resulting from the civil rights movement, second-wave feminism, and opposition to the war in Vietnam.
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Weeraratne, Bilesha. Ban on female migrant workers: Skills-differentiated evidence from Sri Lanka. 44th ed. UNU-WIDER, 2021. http://dx.doi.org/10.35188/unu-wider/2021/982-2.
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This study examines the skills-differentiated impact of a restrictive female labour migration policy in Sri Lanka using monthly departure data from 2012 to 2018 in a difference-in-difference model. The policy has resulted in decreasing departures among lower-skilled groups—female domestic, unskilled, semi-skilled, and skilled workers—and increasing departures among middle-level and professional workers. The decrease in departures of lower-skilled groups is consistent with the objectives of the policy and existing impact evaluation studies, while the increase in higher-skilled workers is consistent with the literature on Family Background Report-related corruption and mis-reporting of skills to avoid the policy. Thus, the Family Background Report policy is associated with higher involvement of lower-skilled workers in recruitment-related corruption, higher exposure to recruitment-related vulnerability, and lower foreign employment opportunities. The study also finds that it was appropriate to exempt the 45–49 year age group from the Family Background Report requirement in 2017.
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Yusoff, Ismail. Tuan Guru Nik Abdul Aziz: Pemikiran agama dan politik. UUM Press, 2015. http://dx.doi.org/10.32890/9789670876061.
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Tuan Guru Dato Nik Abdul Aziz bin Nik Mat ialah seorang pemikir yang multidimensi. Selain dikenali sebagai tokoh politik dan pendakwah, beliau juga disegani sebagai pentadbir yang berintegriti tinggi. Beliau dianggap sebagai model pemimpin Islam di Malaysia masa kini. Sebagai seorang tokoh pembaharuan dan intelektual Muslim, beliau mempunyai kesedaran yang tinggi dan keupayaan yang unik dalam meningkatkan fahaman dan pengamalan agama dalam kalangan masyarakat Islam, khususnya di negeri Kelantan. Pada hemat Nik Aziz, kemajuan masyarakat Islam hanya dapat dicapai melalui pemahaman Islam yang murni dan bebas daripada sinkretisme. Bagi PAS, beliau bukan sahaja Tok Guru yang memberikan nafas baru kepada parti yang hampir mati di bawah kepimpinan Mohd Asri Hj. Muda, tetapi juga Mursyidul Am, ideologue dan custodian kepada nilai-nilai ideologi parti tersebut.Ikon yang zuhud ini ialah tonggak kekuatan PAS.Beliau bukan sahaja berjaya melakukan perubahan dalam senario politik dalaman PAS, tetapi juga berhasil meningkatkan pengaruh PAS, terutama dalam kalangan kaum bukan Melayu.Melalui cara ini, beliau bukan sahaja berjaya mengubah landskap politik Malaysia ke arah masyarakat berpolitik yang berpengetahuan, bersumberkan ilmu yang menunjuk jalan, dan juga politik yang bebas daripada sentimen perkauman.Nik Aziz juga ialah tokoh pembaharuan dalam bidang pentadbiran.Pendekatan politik dan pentadbirannya yang berbentuk high politics dan menuju God-centricity ini adalah suatu pencapaian yang mengagumkan dalam sejarah Islam abad ke-20.
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Ku Hassan, Ku Halim. Himpunan sajak: ABATA. UUM Press, 2018. http://dx.doi.org/10.32890/9789672064992.
Повний текст джерелаАнотація:
Sumpah tujuh keturunan bukan sumpah biasa-biasa. Usai padang jarak padang terkukur tersemat di dada zaman, tamatlah jua sumpah seorang pejuang budaya dan sejarah di bumi Langkawi yang terpendam di dasar hati puluhan tahun. Pejuang tidak pernah berundur. Sekalipun bercerai nyawa dari badan, berdikit-dikit beliau terus berpencak secara terus agar seni budaya dan sejarah Mahsuri tidak hilang begitu sahaja.Gelanggangnya adalah masyarakat. Kuda-kuda ditegapkan selama ini bagi menangkis musuh. Musuhnya adalah masa dan peradaban. Namun, Abata tetap dijunjung dan diletakkan pada singgahsana termahal. Ku Halim Ku Hassan bukan manusia biasa-biasa. Sajak-sajaknya umpama keris berlok tujuh yang dilangir dengan limau dari 99 pulau.Ku Halim Ku Hassan dilahirkan pada 11 Oktober 1947 di Kampung Raja, Padang Mat Sirat Langkawi. Pesara kerajaan ini telah mula terlibat dengan bidang seni sejak awal persekolahan serta amat meminati pengkajian sejarah. Pernah menjadi seorang pendidik pada sekitar 1966 dan bertugas sebagai anggota tentera dalam Rejimen Semboyan pada tahun 1968 hingga 1975. Semangat patriotik dan kecintaan terhadap bangsa dan negara begitu kuat dalam dirinya.Beliau mula menghasilkan karya kreatif dalam bentuk puisi tradisional (syair dan pantun) serta puisi moden (sajak) sejak 30 tahun lalu. Puisi beliau sering menjadi perhatian beberapa orang ahli politik tempatan khususnya dalam Parlimen Langkawi kerana elemen nasionalisme yang diterapkan dalam setiap nukilannya. Beliau pernah menerima beberapa pingat kebesaran antaranya Ahli Mangku Negara (AMN), Ahli Mahkota Kedah (AMK), Bintang Khidmat Masyarakat (BKM) dan Pingat Jasa Kebaktian (PJK). Penulis juga telah dilantik sebagai fasilitator seni budaya oleh Pusat Latihan Kemahiran Negara (PLKN) Langkawi serta sering diundang memberikan pengkisahan tentang sejarah Langkawi, Mahsuri, serta Beras Terbakar yang terletak dalam kawasan rumah beliau.Kini beliau aktif bergiat dalam seni kreatif di Langkawi dan merupakan antara individu yang merestui penubuhan Persatuan Gabungan Penulis dan Penggiat Seni Budaya Langkawi (PGSBL) sebagai entiti memartabatkan seni sastera dan budaya di Langkawi.
7
Robert, Pascal, ed. L'impensé numérique - Tome 2 - Interprétations critiques et logiques pragmatiques de l’impensé. Editions des archives contemporaines, 2020. http://dx.doi.org/10.17184/eac.9782813003577.
Повний текст джерелаАнотація:
Ce deuxième tome de l’impensé numérique, qui vient compléter le premier tome paru en 2016, participe au développement d’une pensée critique du numérique que le directeur de cet ouvrage collectif a engagée voilà 25 ans maintenant. Il marque en quelque sorte un anniversaire, celui d’une réflexion au long cours sur l‘informatisation de la société. Ce temps long de la recherche se révèle, notamment, dans la première partie qui vise à élaborer, reprendre et affiner le cadre conceptuel de ce travail. On y revient, à nouveaux frais, sur les notions d’impensé informatique et numérique, on y présente les notions de « glissement de la prérogative politique » (GPP), qui souligne la prise en main par des acteurs privés de prérogatives jusque là dévolues au politique et de « gestionnarisation », qui désigne le processus qui met en avant la technique (gestion et numérique) et ses catégories au détriment des activités qui doivent s’y adapter. Ce travail de construction théorique, qui mobilise aussi les notions de confiance, d’usage, d’imaginaire et de reconnaissance, s’est déployé sur une bonne quinzaine d’année. Nous n’avons pas voulu supprimer cette épaisseur temporelle, qui fait pleinement partie du travail de recherche lui-même. Les deuxième et troisième parties font le point sur ce que l’on peut appeler une pragmatique de l’impensé : à savoir, comment il s’installe très concrètement aussi bien dans le mode de fonctionnement et d’architecturation d’internet, que dans nos plateformes et dans la manière dont elles transforment le jeu médiatique, à travers, également, l’instauration d’une nouvelle monnaie (le Bitcoin) et de son support technique (la blockchain) ou, enfin, par le biais du big data. L’impensé, en ce sens, n’est pas seulement un effet de discours, il est aussi un effet, pratique, de structuration du réel qui a pour conséquence de fermer des espaces de discutabilité. Ce qui est vrai à l’échelle stratégique de la deuxième partie l’est tout autant à l’échelle tactique, plus locale, qu’adopte la troisième partie : car l’impensé est tout autant au travail dans les discours performatifs de l’éducation, dans celui de la vulgarisation technique de l‘informatique que dans ceux qui structurent les espaces numériques de la culture. Un dernier texte ouvre sur une proposition technique qui s’appuie sur une réflexion critique, afin de montrer que celle-ci n’est pas seulement négative ou supposément technophobe, mais qu’elle peut également nourrir un dispositif technique innovant. La conclusion s’interroge sur la persistance des conditions de possibilité du développement d’une véritable posture critique face à ceux que l’on peut appeler les impenseurs. Elle offre également un petit kit pédagogique de présentation de l‘impensé, du GPP et de la gestionnarisation pour que la critique argumentée puisse, peut être, être mieux entendue. Avec les contributions de : Eric Arrivé, Julien Falgas, Chloé Girard, Isabelle Hare, Aude Inaudi, Marc Jahjah et Adrian Staii.
8
Marques, Marcia Alessandra Arantes, ed. Pesquisa em Engenharia: Ciência e Aplicação. Bookerfield Editora, 2022. http://dx.doi.org/10.53268/bkf22040200.
Повний текст джерелаАнотація:
Neste livro são apresentados resultados de trabalhos científicos aplicados à grande área de Engenharia. De abordagem objetiva, a obra se mostra de grande relevância para graduandos, alunos de pós-graduação, docentes e profissionais. Os capítulos estão agrupados em duas seções: i) materiais; ii) águas continentais e oceânicas. Pelo capítulo um é apresentado o desenvolvimento de uma metodologia para obter-se reprodutibilidade da área superficial de um eletrodo de estanho durante o estudo do crescimento de óxidos de estanho. A reprodutibilidade da área superficial pode ser comprovada pela reprodutibilidade das densidades de carga anódicas dos voltamogramas anódicos a 50 mVs-1 posteriores a cada tratamento. Por meio do capítulo dois é analisada a substituição de parte do carvão mineral, utilizado em siderúrgicas, por biomassa. Entre os grandes desafios do setor estão a produção de aço a preços competitivos e a substituição de parte do carvão mineral utilizado por biomassa. A biomassa é considera neutra em emissões de CO2, devido a captura do mesmo durante o processo de fotossíntese, o que a torna atraente para seu uso nos processos siderúrgicos. Além disso, o seu uso pode gerar redução de custos, principalmente se for considerado os rejeitos do agronegócio que não possuem um alto valor agregado. Neste contexto, por este capítulo serão mostradas algumas possíveis utilizações de biomassa nos processos siderúrgicos através de estudos que vem sendo realizado no tema e aplicações na indústria. Será possível notar que o uso de biomassa é uma alternativa viável a curto prazo para atender as crescentes restrições ambientais atuais. Através do capítulo três é analisado o crescimento voltamétrico de óxido de estanho em solução tampão fosfato, pH 8,7. Medidas elipsométricas ex-situ foram realizadas para determinar a espessura dos óxidos crescidos. A partir desses resultados, o volume do filme por unidade de carga, Vf, foi calculado para diferentes densidades de carga. As medidas elipsométricas mostram que filmes de óxido de estanho crescidos a 2 mVs-1 são menos densos para valores de espessura 3,37 nm, tendo Vf próximo a 1,70 x 10-4 cm3C-1. Para valores mais altos de espessura (11,0 – 12,4 nm) os filmes se tornam mais densos tendo Vf próximo a 0,5 x 10-4 cm3C-1. No caso de 100 mVs-1 os filmes apresentam o mesmo comportamento, tendo Vf próximo de 3,74 x 10-4 cm3.C-1 para espessura de 4,56 nm e Vf próximo de 1,32 x 10-4 cm3.C-1 para espessura de 7,42 nm. Imagens de Microscopia de Força Atômica mostraram que a morfologia muda e a rugosidade dos filmes aumenta com o aumento da espessura e do potencial final da voltametria. O capítulo quatro trata do Nitreto cúbico de boro (cBN), material imprescindível para usinagem com alta precisão e alta velocidade de APRESENTAÇÃO materiais ferrosos como aço. O cBN é recomendado para trabalhos sob condições severas, tais como corte intermitente, em que dureza deve estar associada com tenacidade para evitar a quebra. Na síntese do cBN, são aplicados, basicamente, dois tipos de catalisadores: nitreto de magnésio e magnésio. Cada qual oferece diferentes possibilidades, tais como maiores valores de profundidade de corte ou menor nível de rugosidade superficial. Este capítulo contribui para uma melhor compreensão da manipulação dos parâmetros aplicados no regime de síntese deste elemento e, favorecendo o desenvolvimento da tecnologia de sua produção. Por meio do capítulo cinco é avaliada a aplicação de separação magnética de alta intensidade no beneficiamento de itabiritos pobres. Na rota de processo avaliada (separação magnética + flotação), a etapa de separação magnética executa a função de pré-concentração e deslamagem. O teor de SiO2 no concentrado foi de 1,46% (menor que o teor objetivo de 2,00%). As recuperações mássica e metalúrgica obtidas com a rota separação magnética + flotação foram maiores em termos absolutos 3,3% e 4,4%, respectivamente. Através do capítulo seis é realizada a otimização de injeção de poliamida PA66 com 50% GF usando o método Taguchi. O estudo se justifica pela necessidade crescente de materiais mais leves e de maior produtividade em substituição às ligas metálicas, o que demanda o constante desenvolvimento de compósitos poliméricos e eficazes processos de fabricação. Como resposta do estudo, mediu-se a resistência máxima de tração (RTmáx), numa poliamida 66 com carga de 50% de fibra de vidro, Grivory GV-5H®. Fez-se uso da metodologia ANOVA para indentificar-se os fatores de maior significância para o processo. A melhor resistência máxima de tração obtida de 242,6 N/m2, mostrou-se como uma opção na substituição à aplicações de ligas metálicas de alumínio. A melhor resultado se obteve com a temperatura de processamento em 270°C, o fluxo volumétrico de 83 cm³/s, a pressão de recalque de 300 bar, a contrapressão de 10 bar, velocidade da rosca de 50 min-1 e o tempo de recalque com valor de 5 s. As porcentagens de contribuição encontradas foram pressão de recalque com contribuição de 61%, seguido da temperatura de processamento, com contribuição de 17% e em terceiro, o fluxo volumétrico com contribuição de 12%. A instalação de grandes equipamentos submarinos em águas profundas apresenta uma série de desafios. O capítulo sete trata da análise de estabilidade hidrodinâmica de Manifolds submarinos durante a instalação pelo método pendular. O presente capítulo racionaliza tal método e, além disso, considera sistemas para evitar o capotamento, durante um momento crítico do método que é o início da descida, apresentando uma modelagem matemática fenomenológica a partir de casos similares. A etapa de validação foi realizada pela análise comparativa entre a modelagem proposta e resultados de testes experimentais realizados com modelos físicos. Com a confirmação da aderência dos resultados numéricos com os experimentos, esta abordagem se confirma como uma ferramenta de engenharia para dimensionamento dos equipamentos submarinos instalados pelo Método Pendular para que sejam direcionalmente estáveis. Por meio do capítulo oito são apresentados os resultados da simulação da distribuição espacial das ondas geradas pela ação de ventos severos sobre o reservatório da barragem de Salto Caxias, no rio Iguaçu, estado do Paraná. Os ventos severos foram estimados através da análise de frequência regional para várias estações anemométricas do Instituto Meteorológico do Paraná (SIMEPAR) para o período de 1998 a 2005. As alturas de ondas foram estimadas pelo método paramétrico SMB, que usa como dados de entrada o fetch e a velocidade do vento. O método SMB foi aplicado pelo modelo computacional ONDACAD. Os testes estatísticos indicaram que a distribuição de Wakeby foi a mais robusta para as séries curtas de ventos horários máximos anuais, produzindo estimativas de ventos severos que variaram entre 25,7 ms-1 (tempo de retorno de Tr=10 anos) a 50,9 ms-1 (Tr=100 anos). O estudo presta grande contribuição à compreensão da quantificação das alturas de ondas geradas por ventos severos neste importante reservatório do estado do Paraná. Pelo capítulo nove é apresentada uma análise comparativa bidimensional entre alturas de ondas resultantes da aplicação dos modelos paramétricos MARQUES e JONSWAP ao reservatório da Usina Hidrelétrica de Itaipu Binacional, localizado no Rio Paraná entre o Brasil e o Paraguai. Os campos de vento uniforme relacionados a períodos de recorrência de 10, 20, 50 e 100 anos foram obtidos pelos registros realizados pelo Sistema Meteorológico do Paraná (SIMEPAR). Através da utilização do modelo ONDACAD foram determinados os campos de fetch e a transformação em campos de ondas pela utilização dos modelos paramétricos MARQUES e JONSWAP. Ao proceder a análise constatou-se que, ao majorar os resultados do modelo JONSWAP em 78% chega-se aos resultados bidimensionais gerados pelo modelo Marques. Esta condição foi verificada para situações de ventos extremos, ou seja, superiores a 20ms-1 e corpos hídricos que possuem fetch máximo da ordem de 10 quilômetros. O estudo contribui para a compreensão da distribuição das magnitudes das alturas de ondas neste reservatório de grande importância no âmbito da América do Sul, de grande utilidade para estudos relacionados, por exemplo, a erosões marginais, ecossistemas aquáticos continentais, psicultura por tanques-rede, quantificação de gases de efeito estufa devido à ressuspensão de sedimentos devido a propagação de ondas.
9
Marques, Marcia Alessandra Arantes, ed. Pesquisa em Engenharia: Ciência e Aplicação. Bookerfield Editora, 2022. http://dx.doi.org/10.53268/bkf22040200.
Повний текст джерелаАнотація:
Neste livro são apresentados resultados de trabalhos científicos aplicados à grande área de Engenharia. De abordagem objetiva, a obra se mostra de grande relevância para graduandos, alunos de pós-graduação, docentes e profissionais. Os capítulos estão agrupados em duas seções: i) materiais; ii) águas continentais e oceânicas. Pelo capítulo um é apresentado o desenvolvimento de uma metodologia para obter-se reprodutibilidade da área superficial de um eletrodo de estanho durante o estudo do crescimento de óxidos de estanho. A reprodutibilidade da área superficial pode ser comprovada pela reprodutibilidade das densidades de carga anódicas dos voltamogramas anódicos a 50 mVs-1 posteriores a cada tratamento. Por meio do capítulo dois é analisada a substituição de parte do carvão mineral, utilizado em siderúrgicas, por biomassa. Entre os grandes desafios do setor estão a produção de aço a preços competitivos e a substituição de parte do carvão mineral utilizado por biomassa. A biomassa é considera neutra em emissões de CO2, devido a captura do mesmo durante o processo de fotossíntese, o que a torna atraente para seu uso nos processos siderúrgicos. Além disso, o seu uso pode gerar redução de custos, principalmente se for considerado os rejeitos do agronegócio que não possuem um alto valor agregado. Neste contexto, por este capítulo serão mostradas algumas possíveis utilizações de biomassa nos processos siderúrgicos através de estudos que vem sendo realizado no tema e aplicações na indústria. Será possível notar que o uso de biomassa é uma alternativa viável a curto prazo para atender as crescentes restrições ambientais atuais. Através do capítulo três é analisado o crescimento voltamétrico de óxido de estanho em solução tampão fosfato, pH 8,7. Medidas elipsométricas ex-situ foram realizadas para determinar a espessura dos óxidos crescidos. A partir desses resultados, o volume do filme por unidade de carga, Vf, foi calculado para diferentes densidades de carga. As medidas elipsométricas mostram que filmes de óxido de estanho crescidos a 2 mVs-1 são menos densos para valores de espessura 3,37 nm, tendo Vf próximo a 1,70 x 10-4 cm3C-1. Para valores mais altos de espessura (11,0 – 12,4 nm) os filmes se tornam mais densos tendo Vf próximo a 0,5 x 10-4 cm3C-1. No caso de 100 mVs-1 os filmes apresentam o mesmo comportamento, tendo Vf próximo de 3,74 x 10-4 cm3.C-1 para espessura de 4,56 nm e Vf próximo de 1,32 x 10-4 cm3.C-1 para espessura de 7,42 nm. Imagens de Microscopia de Força Atômica mostraram que a morfologia muda e a rugosidade dos filmes aumenta com o aumento da espessura e do potencial final da voltametria. O capítulo quatro trata do Nitreto cúbico de boro (cBN), material imprescindível para usinagem com alta precisão e alta velocidade de APRESENTAÇÃO materiais ferrosos como aço. O cBN é recomendado para trabalhos sob condições severas, tais como corte intermitente, em que dureza deve estar associada com tenacidade para evitar a quebra. Na síntese do cBN, são aplicados, basicamente, dois tipos de catalisadores: nitreto de magnésio e magnésio. Cada qual oferece diferentes possibilidades, tais como maiores valores de profundidade de corte ou menor nível de rugosidade superficial. Este capítulo contribui para uma melhor compreensão da manipulação dos parâmetros aplicados no regime de síntese deste elemento e, favorecendo o desenvolvimento da tecnologia de sua produção. Por meio do capítulo cinco é avaliada a aplicação de separação magnética de alta intensidade no beneficiamento de itabiritos pobres. Na rota de processo avaliada (separação magnética + flotação), a etapa de separação magnética executa a função de pré-concentração e deslamagem. O teor de SiO2 no concentrado foi de 1,46% (menor que o teor objetivo de 2,00%). As recuperações mássica e metalúrgica obtidas com a rota separação magnética + flotação foram maiores em termos absolutos 3,3% e 4,4%, respectivamente. Através do capítulo seis é realizada a otimização de injeção de poliamida PA66 com 50% GF usando o método Taguchi. O estudo se justifica pela necessidade crescente de materiais mais leves e de maior produtividade em substituição às ligas metálicas, o que demanda o constante desenvolvimento de compósitos poliméricos e eficazes processos de fabricação. Como resposta do estudo, mediu-se a resistência máxima de tração (RTmáx), numa poliamida 66 com carga de 50% de fibra de vidro, Grivory GV-5H®. Fez-se uso da metodologia ANOVA para indentificar-se os fatores de maior significância para o processo. A melhor resistência máxima de tração obtida de 242,6 N/m2, mostrou-se como uma opção na substituição à aplicações de ligas metálicas de alumínio. A melhor resultado se obteve com a temperatura de processamento em 270°C, o fluxo volumétrico de 83 cm³/s, a pressão de recalque de 300 bar, a contrapressão de 10 bar, velocidade da rosca de 50 min-1 e o tempo de recalque com valor de 5 s. As porcentagens de contribuição encontradas foram pressão de recalque com contribuição de 61%, seguido da temperatura de processamento, com contribuição de 17% e em terceiro, o fluxo volumétrico com contribuição de 12%. A instalação de grandes equipamentos submarinos em águas profundas apresenta uma série de desafios. O capítulo sete trata da análise de estabilidade hidrodinâmica de Manifolds submarinos durante a instalação pelo método pendular. O presente capítulo racionaliza tal método e, além disso, considera sistemas para evitar o capotamento, durante um momento crítico do método que é o início da descida, apresentando uma modelagem matemática fenomenológica a partir de casos similares. A etapa de validação foi realizada pela análise comparativa entre a modelagem proposta e resultados de testes experimentais realizados com modelos físicos. Com a confirmação da aderência dos resultados numéricos com os experimentos, esta abordagem se confirma como uma ferramenta de engenharia para dimensionamento dos equipamentos submarinos instalados pelo Método Pendular para que sejam direcionalmente estáveis. Por meio do capítulo oito são apresentados os resultados da simulação da distribuição espacial das ondas geradas pela ação de ventos severos sobre o reservatório da barragem de Salto Caxias, no rio Iguaçu, estado do Paraná. Os ventos severos foram estimados através da análise de frequência regional para várias estações anemométricas do Instituto Meteorológico do Paraná (SIMEPAR) para o período de 1998 a 2005. As alturas de ondas foram estimadas pelo método paramétrico SMB, que usa como dados de entrada o fetch e a velocidade do vento. O método SMB foi aplicado pelo modelo computacional ONDACAD. Os testes estatísticos indicaram que a distribuição de Wakeby foi a mais robusta para as séries curtas de ventos horários máximos anuais, produzindo estimativas de ventos severos que variaram entre 25,7 ms-1 (tempo de retorno de Tr=10 anos) a 50,9 ms-1 (Tr=100 anos). O estudo presta grande contribuição à compreensão da quantificação das alturas de ondas geradas por ventos severos neste importante reservatório do estado do Paraná. Pelo capítulo nove é apresentada uma análise comparativa bidimensional entre alturas de ondas resultantes da aplicação dos modelos paramétricos MARQUES e JONSWAP ao reservatório da Usina Hidrelétrica de Itaipu Binacional, localizado no Rio Paraná entre o Brasil e o Paraguai. Os campos de vento uniforme relacionados a períodos de recorrência de 10, 20, 50 e 100 anos foram obtidos pelos registros realizados pelo Sistema Meteorológico do Paraná (SIMEPAR). Através da utilização do modelo ONDACAD foram determinados os campos de fetch e a transformação em campos de ondas pela utilização dos modelos paramétricos MARQUES e JONSWAP. Ao proceder a análise constatou-se que, ao majorar os resultados do modelo JONSWAP em 78% chega-se aos resultados bidimensionais gerados pelo modelo Marques. Esta condição foi verificada para situações de ventos extremos, ou seja, superiores a 20ms-1 e corpos hídricos que possuem fetch máximo da ordem de 10 quilômetros. O estudo contribui para a compreensão da distribuição das magnitudes das alturas de ondas neste reservatório de grande importância no âmbito da América do Sul, de grande utilidade para estudos relacionados, por exemplo, a erosões marginais, ecossistemas aquáticos continentais, psicultura por tanques-rede, quantificação de gases de efeito estufa devido à ressuspensão de sedimentos devido a propagação de ondas.
Частини книг з теми "MIT Bag model"
1
Rabinovich, Vladimir. "Boundary Value Problems for 3D-Dirac Operators and MIT Bag Model." In Operator Theory and Harmonic Analysis, 479–95. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77493-6_28.
Повний текст джерела
2
Hecht, K. T. "The MIT Bag Model: The Dirac Equation for a Quark Confined to a Spherical Region." In Quantum Mechanics, 713–18. New York, NY: Springer New York, 2000. http://dx.doi.org/10.1007/978-1-4612-1272-0_77.
Повний текст джерела
3
Brandi, Tim Oliver, Sven Brandt, and Franz-Josef Schöne. "Rechtliche Fragestellungen im Zusammenhang mit Abwicklungsanstalten." In Modell „Bad Bank“: Hintergrund – Konzept – Erfahrungen, 169–200. Wiesbaden: Gabler Verlag, 2012. http://dx.doi.org/10.1007/978-3-8349-7165-4_9.
Повний текст джерела
4
Beckröge, Thomas. "Öko-Controlling — Erfahrungen mit dem Modell Bad Harzburg." In Kommunales EG-Öko-Audit, 121–34. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-01621-3_10.
Повний текст джерела
5
Nagel, Frank, and Frank Gutheim. "Marktrisikomanagement: Steuerung und Controlling - der Umgang mit Risiken in einer Abwicklungsanstalt." In Modell „Bad Bank“: Hintergrund – Konzept – Erfahrungen, 203–13. Wiesbaden: Gabler Verlag, 2012. http://dx.doi.org/10.1007/978-3-8349-7165-4_10.
Повний текст джерела
6
Kwatra, Saloni, and Vicenç Torra. "Data Reconstruction Attack Against Principal Component Analysis." In Security and Privacy in Social Networks and Big Data, 79–92. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-5177-2_5.
Повний текст джерелаАнотація:
AbstractAttacking machine learning models is one of the many ways to measure the privacy of machine learning models. Therefore, studying the performance of attacks against machine learning techniques is essential to know whether somebody can share information about machine learning models, and if shared, how much can be shared? In this work, we investigate one of the widely used dimensionality reduction techniques Principal Component Analysis (PCA). We refer to a recent paper that shows how to attack PCA using a Membership Inference Attack (MIA). When using membership inference attacks against PCA, the adversary gets access to some of the principal components and wants to determine if a particular record was used to compute those principal components. We assume that the adversary knows the distribution of training data, which is a reasonable and useful assumption for a membership inference attack. With this assumption, we show that the adversary can make a data reconstruction attack, which is a more severe attack than the membership attack. For a protection mechanism, we propose that the data guardian first generate synthetic data and then compute the principal components. We also compare our proposed approach with Differentially Private Principal Component Analysis (DPPCA). The experimental findings show the degree to which the adversary successfully attempted to recover the users’ original data. We obtained comparable results with DPPCA. The number of principal components the attacker intercepted affects the attack’s outcome. Therefore, our work aims to answer how much information about machine learning models is safe to disclose while protecting users’ privacy.
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Liu, Yuchen. "Study on the Influence of the Arrangement of Thermal Insulation Floor on the Thermal Insulation and Mechanical Properties of Hollow Slab." In Lecture Notes in Civil Engineering, 125–36. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1748-8_10.
Повний текст джерелаАнотація:
AbstractIn order to study the influence of the arrangement of thermal insulation floor on the thermal insulation and mechanical properties of hollow slab, ABAQUS is used to establish the model of thermal analysis and mechanical behavior of hollow slab. By investigating distribution of temperature, distribution of heat flux, damage and deformation of floor, deformation of mid-span deflection and other characteristics of the floor section, it is concluded that although the transmission of heat can be effectively obstructed by the thermal insulation slab, the heat will be transferred to the interior of the floor through the gap between the thermal insulation slabs. The arrangement of thermal insulation slab is not the main factor which affect the thermal insulation properties of the floor with the same coverage area. Different arrangement of the thermal insulation slab has a certain impact on the mechanical performance of floor. It is recommended to arrange the thermal insulation slab in equal sections to fully improve the contact area between steel bar and concrete, which can effectively provide the bearing capacity of the floor.
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Struski, Łukasz, Dawid Rymarczyk, Arkadiusz Lewicki, Robert Sabiniewicz, Jacek Tabor, and Bartosz Zieliński. "ProMIL: Probabilistic Multiple Instance Learning for Medical Imaging." In Frontiers in Artificial Intelligence and Applications. IOS Press, 2023. http://dx.doi.org/10.3233/faia230518.
Повний текст джерелаАнотація:
Multiple Instance Learning (MIL) is a weakly-supervised problem in which one label is assigned to the whole bag of instances. An important class of MIL models is instance-based, where we first classify instances and then aggregate those predictions to obtain a bag label. The most common MIL model is when we consider a bag as positive if at least one of its instances has a positive label. However, this reasoning does not hold in many real-life scenarios, where the positive bag label is often a consequence of a certain percentage of positive instances. To address this issue, we introduce a dedicated instance-based method called ProMIL, based on deep neural networks and Bernstein polynomial estimation. An important advantage of ProMIL is that it can automatically detect the optimal percentage level for decision-making. We show that ProMIL outperforms standard instance-based MIL in real-world medical applications. We make the code available.
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Davenport, Thomas H. "Ein Wiedersehen mit dem DELTA-Modell." In big data @ work, 141–42. Vahlen, 2014. http://dx.doi.org/10.15358/9783800648153-141.
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Beckerath, Verena von, Jessica Christoph, Carsten Praum, and Barbara Schönig. "Das Modell einer Wohnung mit Optionen." In Drei Zimmer, Küche, Diele, Bad, 122–25. De Gruyter, 2022. http://dx.doi.org/10.1515/9783868597981-012.
Повний текст джерелаТези доповідей конференцій з теми "MIT Bag model"
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SCHVELLINGER, MARTIN. "THE MIT BAG MODEL IN NUCLEAR MEDIUM FROM EQMC AND QHD DESCRIPTIONS." In Fifth Rio de Janeiro International Workshop. WORLD SCIENTIFIC, 1998. http://dx.doi.org/10.1142/9789814528917_0024.
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SHINOZAKI, TETSUYA, MAKOTO OKA, and SACHIKO TAKEUCHI. "CONTRIBUTION OF INSTANTON INDUCED INTERACTION FOR PENTA-QUARKS IN MIT BAG MODEL." In Proceedings of the International Workshop. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812701855_0039.
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Miyatsu, Tsuyoshi, Myung-Ki Cheoun, and Koichi Saito. "Properties of Neutron Stars with Hyperons and Quarks Using Relativistic Hartree–Fock Approximation and MIT Bag Model." In Proceedings of the 12th International Conference on Hypernuclear and Strange Particle Physics (HYP2015). Journal of the Physical Society of Japan, 2017. http://dx.doi.org/10.7566/jpscp.17.102004.
Повний текст джерела
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Zhang, Ya-Lin, and Zhi-Hua Zhou. "Multi-Instance Learning with Key Instance Shift." In Twenty-Sixth International Joint Conference on Artificial Intelligence. California: International Joint Conferences on Artificial Intelligence Organization, 2017. http://dx.doi.org/10.24963/ijcai.2017/481.
Повний текст джерелаАнотація:
Multi-instance learning (MIL) deals with the tasks where each example is represented by a bag of instances. A bag is positive if it contains at least one positive instance, and negative otherwise. The positive instances are also called key instances. Only bag labels are observed, whereas specific instance labels are not available in MIL. Previous studies typically assume that training and test data follow the same distribution, which may be violated in many real-world tasks. In this paper, we address the problem that the distribution of key instances varies between training and test phase. We refer to this problem as MIL with key instance shift and solve it by proposing an embedding based method MIKI. Specifically, to transform the bags into informative vectors, we propose a weighted multi-class model to select the instances with high positiveness as instance prototypes. Then we learn the importance weights for transformed bag vectors and incorporate original instance weights into them to narrow the gap between training/test distributions. Experimental results validate the effectiveness of our approach when key instance shift occurs.
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DENG, Yiqi, and Siu Ming YIU. "Deep Multiple Instance Learning for Forecasting Stock Trends using Financial NewsDeep Multiple Instance Learning for Forecasting Stock Trends using Financial News." In 8th International Conference on Artificial Intelligence (ARIN 2022). Academy and Industry Research Collaboration Center (AIRCC), 2022. http://dx.doi.org/10.5121/csit.2022.121008.
Повний текст джерелаАнотація:
A major source of information can be taken from financial news articles, which have some correlations about the fluctuation of stock trends. In this paper, we investigate the influences of financial news on the stock trends, from a multi-instance view. The intuition behind this is based on the news uncertainty of varying intervals of news occurrences and the lack of annotation in every single financial news. Under the scenario of Multiple Instance Learning (MIL) where training instances are arranged in bags, and a label is assigned for the entire bag instead of instances, we develop a flexible and adaptive multi-instance learning model and evaluate its ability in directional movement forecast of Standard & Poor’s 500 index on financial news dataset. Specifically, we treat each trading day as one bag, with certain amounts of news happening on each trading day as instances in each bag. Experiment results demonstrate that our proposed multi-instance-based framework gains outstanding results in terms of the accuracy of trend prediction, compared with other state-of-art approaches and baselines.
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Zhao, Yue, Zhaoyi Joey Dai, Chong Dai, Xin Wang, Samridhdi Paudyal, Saebom Ko, Xuanzhu Yao, Cianna Leschied, Amy Kan, and Mason Tomson. "A Quantitative Study of Sr2+ Impact on Barite Crystallization and Inhibition Kinetics." In SPE International Conference on Oilfield Chemistry. SPE, 2021. http://dx.doi.org/10.2118/204361-ms.
Повний текст джерелаАнотація:
Abstract Scale inhibitors have been widely used for barite scale control. Our group has developed several barite crystallization and inhibition models to predict the crystallization and inhibition kinetics of pure barite with different inhibitors and calculate the minimum inhibitor concentration (MIC) required. However, instead of pure barite scale formation, the incorporation of Sr2+ can be frequently found in the oilfield, because of the coexistence of Ba2+ and Sr2+ in the produced water, which can influence the kinetics of crystallization and inhibition significantly. As a result, the MIC predicted could be off significantly. Therefore, in this study, the effect of Sr2+ on barite crystallization and inhibition kinetics is quantitatively investigated to evaluate the accuracy of MIC values under various conditions. The induction time of barite with different concentrations of Sr2+ was measured by laser apparatus without or with different concentrations of scale inhibitor diethylenetriamine penta(methylene phosphonic acid) (DTPMP) at the conditions: barite saturation index (SI) from 1.5 to 1.8; temperature (T) from 40 to 70 ℃; and [Sr2+]/[Ba2+] molar ratios from 0 to 15, all with celestite SI < 0. The results show that the induction time of the barite increases with [Sr2+]/[Ba2+] ratio at a fixed barite SI, T and DTPMP dosage. That means the MIC will be overestimated if it is calculated by previous semiempirical pure barite crystallization and inhibition models, without considering the presence of Sr2+. Based on the experimental results, the novel quantitative barite crystallization and inhibition models that include the influence of Sr2+ were developed for the first time as follows: Barite crystallization model with the influence of Sr2+: l o g 10 t 0 B a S O 4 , S r = ( 1.523 − 10.88 S I − 895.67 T ( K ) + 5477 S I × T ( K ) + 0.829 × [ C a 2 + ] ) + ( 0.823 S I + 85.44 T ( K ) − 0.667 ) × ( [ Sr 2 + ] [ B a 2 + ] ) Barite inhibition model including the influence of Sr2+ l o g 10 ( t i n h B a s o 4 , S r t 0 B a S O 4 , S r ) = b B a S O 4 , S r × C i n h l o g 10 b B a S O 4 , S r = ( − 2.187 − 1.411 × S I + 1329.29 T ( K ) + 0.153 × p H ) + ( 0.0983 × S I − 74.66 T ( K ) + 0.099 ) × ( [ Sr 2 + ] [ B a 2 + ] ) These novel models are in good agreement with the experimental data. They are used to predict the induction time and MIC more accurately at these common Ba2+ and Sr2+ coexisting scenarios. The observations and new models proposed in this study will significantly improve the barite scale management when Ba2+ and Sr2+ coexist in the oilfield.
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Lazar, Alina, Alexandra Ballow, Ling Jin, C. Anna Spurlock, Alexander Sim, and Kesheng Wu. "Machine Learning for Prediction of Mid to Long Term Habitual Transportation Mode Use." In 2019 IEEE International Conference on Big Data (Big Data). IEEE, 2019. http://dx.doi.org/10.1109/bigdata47090.2019.9006411.
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Tawfik, Ahmed, and Viktor Mechtcherine. "On the shear behavior of mineral-bonded composites under impact loading." In 61. Forschungskolloquium mit 9. Jahrestagung des DAfStb. TU Dresden, 2022. http://dx.doi.org/10.25368/2022.371.
Повний текст джерелаАнотація:
A mechanical testing device was developed for testing the behavior of mineral-bonded composites under impact shear loading. The device is based on the well-known double shear specimen configuration and was designed to be used in a gravity split-Hopkinson tension bar (SHTB), enabling shear testing at high loading rates. In this work, results from impact shear testing performed on a normal cementitious matrix (NSM) and strain-hardening cement-based composites (SHCC) tested by means of the new device are presented and discussed. Failure behavior and fracture modes are analyzed using optical measurements and digital image correlation (DIC).
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Dhanaraj, Mayur, Manish Sharma, Tiyasa Sarkar, Srivallabha Karnam, Dimitris Chachlakis, Raymond Ptucha, Panos P. Markopoulos, and Eli Saber. "Vehicle detection from multi-modal aerial imagery using YOLOv3 with mid-level fusion." In Big Data II: Learning, Analytics, and Applications, edited by Fauzia Ahmad. SPIE, 2020. http://dx.doi.org/10.1117/12.2558115.
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Durkin, Michael K., Morten Ibsen, Richard I. Laming, and Valeria Gusmeroli. "Equalisation of Spectral Non-Uniformities in Broad-Band Chirped Fibre Gratings." In Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/bgppf.1997.bmg.16.
Повний текст джерелаАнотація:
The use of chirped fibre Bragg gratings (FBGs) in a dispersion compensating role has been shown to be a successful technology with great promise for future network upgrades [1,2]. A natural consequence of using FBGs in a negative dispersion sense is that although the structure is designed to phase-match forward- and backward-propagating LP01 modes, the phase-matching condition for coupling from the forward propagating fundamental mode to a higher order cladding-mode is also met for wavelengths just below that of the fundamental Bragg reflection. Because propagation in cladding-modes is extremely lossy there is a significant out-coupling of this shorter wavelength light. The chirped nature of FBGs designed for broad-band (> 5 nm) dispersion compensation means that this cladding-mode loss is integrated along the length of the grating with the result that the reflection spectrum has a slope extending from the short wavelength edge of the useable bandwidth. In a practical transmission system this in-band variation of reflectivity is unacceptable. In this paper the authors present for the first time a demonstration of spectral equalisation of cladding-mode losses by exercising control over local apodisation along the length of a 8.5 nm 75 cm long continuously-written chirped FBG. No post-processing was used.
Звіти організацій з теми "MIT Bag model"
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Kalen, Nicholas. Remediated for accessibility per Section 508. National Park Service, May 2023. http://dx.doi.org/10.36967/2298454.
Повний текст джерелаАнотація:
I conducted bat surveys at Richmond National Battlefield Park to assess the status of bat communities following potential impacts of the disease white-nose syndrome. This disease, caused by the fungus Pseudogymnoascus destructans, has severely reduced populations of several bat species in the eastern United States, threatening some with regional extirpation. Most affected species include the little brown bat (Myotis lucifugus), northern long-eared bat (Myotis septentrionalis), Indiana bat (Myotis sodalis), and tricolored bat (Perimyotis subflavus). During the summers of 2016-2020, I sampled sites with acoustic bat detectors and conducted capture surveys using mist nets to characterize bat communities with a focus on documenting WNS-imperiled species. I also conducted non-reproductive, or dormant, season acoustic and capture surveys from 2017-2021, to investigate potential local wintering by bats, especially northern long-eared bats, which have recently been discovered wintering in the Coastal Plain of North Carolina. Acoustic results identified the presence of ten bat species by echolocation calls: big brown bat (Eptesicus fuscus), eastern red bat (Lasiurus borealis), hoary bat (Lasiurus cinereus), silver-haired bat (Lasionycteris noctivagans), little brown bat, northern long-eared bat, Indiana bat, evening bat (Nycticeius humeralis), tricolored bat, and Mexican free-tailed bat (Tadarida brasiliensis). Capture surveys documented big brown bats, eastern red bats, silver-haired bats, and evening bats. To examine habitat associations of bat species, I used generalized linear mixed models of a selection of variable candidates: habitat type, distance to water, minimum nightly temperature, and nightly precipitation to predict summer activity. Activity of big brown, eastern red, hoary, and Mexican free-tailed bats was highest in open habitats. Myotis spp. were most associated with mixed forest habitats. Tricolored bat activity was highest and evening bat activity was lowest in riparian and wetland habitats. To examine seasonality in bat species occurrence, I modeled acoustic activity in passes/night by Julian date using generalized additive models. Activity of big brown, eastern red, little brown, and tricolored bats was highest during summer. Activity of northern long-eared and Indiana bats was very low overall but was also highest in the summer. Tree bat species hoary, silver-haired, and Mexican free-tailed bat activity was highest in the spring and fall. Dormant season results suggest some winter occurrences for most bat species. Visual validation of echolocation calls revealed misidentifications were problematic for Myotis spp. little brown bat, northern long-eared bat, and Indiana bat, but diagnostic calls of all three species were recorded. Acoustic passes identified as northern long-eared bats suggest some individuals may be wintering nearby, but winter activity was very low and not indicative of large overwintering populations.
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Kalen, Nicholas. Bats of Richmond National Battlefield Park following white-nose syndrome: Public version. National Park Service, May 2023. http://dx.doi.org/10.36967/2299295.
Повний текст джерелаАнотація:
I conducted bat surveys at Richmond National Battlefield Park to assess the status of bat communities following potential impacts of the disease white-nose syndrome. This disease, caused by the fungus Pseudogymnoascus destructans, has severely reduced populations of several bat species in the eastern United States, threatening some with regional extirpation. Most affected species include the little brown bat (Myotis lucifugus), northern long-eared bat (Myotis septentrionalis), Indiana bat (Myotis sodalis), and tricolored bat (Perimyotis subflavus). During the summers of 2016–2020, I sampled sites with acoustic bat detectors and conducted capture surveys using mist nets to characterize bat communities with a focus on documenting WNS-imperiled species. I also conducted non-reproductive, or dormant, season acoustic and capture surveys from 2017–2021, to investigate potential local wintering by bats, especially northern long-eared bats, which have recently been discovered wintering in the Coastal Plain of North Carolina. Acoustic results identified the presence of ten bat species by echolocation calls: big brown bat (Eptesicus fuscus), eastern red bat (Lasiurus borealis), hoary bat (Lasiurus cinereus), silver-haired bat (Lasionycteris noctivagans), little brown bat, northern long-eared bat, Indiana bat, evening bat (Nycticeius humeralis), tricolored bat, and Mexican free-tailed bat (Tadarida brasiliensis). Capture surveys documented big brown bats, eastern red bats, silver-haired bats, and evening bats. To examine habitat associations of bat species, I used generalized linear mixed models of a selection of variable candidates: habitat type, distance to water, minimum nightly temperature, and nightly precipitation to predict summer activity. Activity of big brown, eastern red, hoary, and Mexican free-tailed bats was highest in open habitats. Myotis spp. were most associated with mixed forest habitats. Tricolored bat activity was highest and evening bat activity was lowest in riparian and wetland habitats. To examine seasonality in bat species occurrence, I modeled acoustic activity in passes/night by Julian date using generalized additive models. Activity of big brown, eastern red, little brown, and tricolored bats was highest during summer. Activity of northern long-eared and Indiana bats was very low overall but was also highest in the summer. Tree bat species hoary, silver-haired, and Mexican free-tailed bat activity was highest in the spring and fall. Dormant season results suggest some winter occurrences for most bat species. Visual validation of echolocation calls revealed misidentifications were problematic for Myotis spp. little brown bat, northern long-eared bat, and Indiana bat, but diagnostic calls of all three species were recorded. Acoustic passes identified as northern long-eared bats suggest some individuals may be wintering nearby, but winter activity was very low and not indicative of large overwintering populations. An internal NPS version of this document that includes an appendix with capture survey site coordinates is available and may be requested as needed.
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Kalen, Nicholas. Bats of Petersburg National Battlefield following white-nose syndrome. National Park Service, May 2023. http://dx.doi.org/10.36967/2299217.
Повний текст джерелаАнотація:
I conducted bat surveys at Petersburg National Battlefield Park (PETE) to assess the status of bat communities following potential impacts of the disease white-nose syndrome. This disease, caused by the fungus Pseudogymnoascus destructans, has severely reduced populations of several bat species in the eastern United States, threatening some with regional extirpation. Most affected species include the little brown bat (Myotis lucifugus), the federally-endangered northern long-eared bat (Myotis septentrionalis) and Indiana bat (Myotis sodalis) (USFWS 2007, USFWS 2022a), as well as the tricolored bat (Perimyotis subflavus), which has been proposed for endangered status (USFWS 2022b). I sampled sites with acoustic bat detectors from the summer of 2016 through fall 2021 and conducted capture surveys using mist nets from 2016-2019 to characterize seasonal occurrence of bat species with a focus on documenting WNS-imperiled species. Surveys also sought to document potential over-wintering of bats at PETE, especially northern long-eared bats, which have recently been discovered wintering in the Coastal Plain of North Carolina. Acoustic results identified the presence of nine bat species by echolocation calls: big brown bat (Eptesicus fuscus), eastern red bat (Lasiurus borealis), hoary bat (Lasiurus cinereus), silver-haired bat (Lasionycteris noctivagans), little brown bat, Indiana bat, evening bat (Nycticeius humeralis), tricolored bat, and Mexican free-tailed bat (Tadarida brasiliensis). Northern long-eared bats were identified acoustically by software, but identifications were invalidated by visual review. Acoustic misidentifications also occurred for little brown and Indiana bats, but diagnostic calls were confirmed. Capture surveys documented big brown bats, eastern red bats, evening bats, and a single little brown bat. To examine habitat associations of bat species, I used generalized linear mixed models of a selection of variable candidates: habitat type, distance to water, minimum nightly temperature, and nightly precipitation to predict summer activity. Activity of big brown, hoary, silver-haired, and Mexican free-tailed bats was highest in open habitats. Little brown and eastern red bats were most associated with mixed forest habitats. Evening bat activity was highest in deciduous forests. Habitat type was not a significant predictor of activity for Indiana and tricolored bat activity. To examine seasonality in bat species occurrence, I modeled acoustic activity in passes/night by Julian date using generalized additive models. Activity of big brown, eastern red, little brown, tricolored, and evening bats was highest during summer. Activity identified as Indiana bats was very low overall but was also highest in the summer. Activity of tree bat species hoary, silver-haired, and Mexican free-tailed bat was highest during the dormant season and peak activity appeared associated with migration. Dormant season results suggest some winter activity for most bat species identified as present in the park.
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Kalen, Nicholas. Bats of Colonial National Historical Park following white-nose syndrome. National Park Service, May 2023. http://dx.doi.org/10.36967/2299226.
Повний текст джерелаАнотація:
I conducted bat surveys at Colonial National Historical Park to assess the status of bat communities following potential impacts of white-nose syndrome (WNS) since its arrival in Virginia in 2009. This disease, caused by the fungus Pseudogymnoascus destructans, has severely reduced populations of several bat species in the eastern United States, threatening some with regional extirpation. In the East, most-affected species include the little brown bat (Myotis lucifugus), the federally-endangered northern long-eared bat (Myotis septentrionalis) and Indiana bat (Myotis sodalis) (USFWS 2007, USFWS 2022a), as well as the tricolored bat (Perimyotis subflavus), which has been proposed for endangered status (USFWS 2022b). I sampled sites in Yorktown and Jamestown Island with acoustic bat detectors from the spring of 2019 through the spring of 2021 and conducted capture surveys using mist nets in 2019 and 2021 to characterize seasonal occurrence of bat species with a focus on documenting WNS-imperiled species. Surveys also sought to document potential over-wintering of bats at COLO, especially northern long-eared bats, which occur year-round in the Coastal Plain of North Carolina. Acoustic results identified the presence of eleven bat species by echolocation calls: big brown bat (Eptesicus fuscus), eastern red bat (Lasiurus borealis), hoary bat (Lasiurus cinereus), silver-haired bat (Lasionycteris noctivagans), southeastern bat (Myotis austroriparius), little brown bat, northern long-eared bat, Indiana bat, evening bat (Nycticeius humeralis), tricolored bat, and Mexican free-tailed bat (Tadarida brasiliensis). Acoustic results included diagnostic echolocation calls of little brown, northern long-eared, and Indiana bats, however, presence should be interpreted with caution due to similarities of call structures among Myotis spp. bats. Capture surveys documented seven species: big brown, eastern red, hoary, silver-haired, southeastern, evening, and tricolored bats. To examine habitat associations of bat species, I used generalized linear mixed models of a selection of variable candidates: habitat type, distance to water, minimum nightly temperature, and nightly precipitation to predict summer activity by significant predictors. Activity of hoary, silver-haired, little brown, evening, tricolored, and Mexican free-tailed bats was highest in open habitats. Big brown bat and Indiana bat identifications were most associated with forest habitats. Eastern red bat activity was high in both forest and open sites. Southeastern bat activity was highest in wetland sites and was largely confined to these habitats. Northern long-eared bat activity was not significantly different among habitat types. To examine seasonality in bat species occurrence, I modeled acoustic activity in passes/night by Julian date using generalized additive models. Activity of big brown, eastern red, hoary, little brown, northern long-eared, tricolored, evening, and Mexican free-tailed bats was highest during summer. Silver-haired bat activity was highest in March indicative of seasonal migration. Hoary and Mexican free-tailed bat also exhibited high activity on several nights in the spring suggestive of migratory movement. Dormant season results suggest some winter occurrence for all identified bat species except Indiana bats. Very few characteristic calls of northern long-eared bats were observed from December through February, suggesting they winter locally in far lower abundances than in the Coastal Plain of North Carolina to the south.
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Wiggert, Jerry, Brandy Armstrong, Mustafa Kemal Cambazoglu, and K. K. Sandeep. Mid-Breton Sediment Diversion (MBrSD) Assessment – Final Report. The University of Southern Mississippi, 2022. http://dx.doi.org/10.18785/sose.001.
Повний текст джерелаАнотація:
The purpose of this project is to provide managers at the Mississippi Department of Marine Resources (MDMR) with the scientific information needed to accurately address public concerns regarding the potential effects of the Louisiana Coastal Master Plan / Coastal Protection and Restoration Authority (CPRA) Mid-Breton Sediment Diversion (MBrSD) on the jurisdictional waters and resources of Mississippi. The stated design purpose of the MBrSD is to reconnect and re-establish the deltaic sediment deposition process between the Mississippi River and the Breton Sound Basin through a diversion that will deliver up to 75,000 cfs of sediment-laden freshwater. The report presented herein provides model-based guidance on the impact that the introduction of the MBrSD will have on salinity conditions in the Mississippi Sound (MSS) and Mississippi's jurisdictional waters that encompass oyster reef locations. Oysters are key ecosystem health indicators and economic drivers for the State of Mississippi and freshwater diversions into the western MS Sound (WMSS) have recently led to significant, unprecedented environmental impacts resulting in oyster mortality. The potential addition of a new pathway for additional freshwater to be introduced into the MSS requires careful assessment of the potential impacts that may be incurred. This project is designed to assess the impact of implementing the MBrSD on the physical environment in the WMSS. The primary aim is to understand the connectivity between MBrSD-derived freshwater input to Breton Sound on the environmental conditions impacting the oyster reefs of the WMSS near Bay St. Louis. A physical ocean modeling system based on the Coupled Ocean Atmosphere Wave Sediment Transport (COAWST) has been used to simulate the circulation and dynamics over the entire MSS with the analysis presented herein focusing particularly on the western to central MSS. This project demonstrates the importance of applying modeling-based scientific research and the capability of physical ocean circulation models for assessing aquatic ecosystem health, particularly in key oyster reef areas.
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Peter, J. M., and M. G. Gadd. Introduction to the volcanic- and sediment-hosted base-metal ore systems synthesis volume, with a summary of findings. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/328015.
Повний текст джерелаАнотація:
This volume presents results of research conducted during phase 5 of the Volcanic- and Sedimentary-hosted Base Metals Ore Systems project of the Geological Survey of Canada's Targeted Geoscience Initiative (TGI) program. The papers in this volume include syntheses and primary scientific reports. We present here a synopsis of the findings during this TGI project. Research activities have addressed several mineral deposit types hosted in sedimentary rocks: polymetallic hyper-enriched black shale, sedimentary exhalative Pb-Zn, carbonate-hosted Pb-Zn (Mississippi Valley-type; MVT), and fracture-controlled replacement Zn-Pb. Other carbonate-hosted deposits studied include a magnesite deposit at Mount Brussilof and a rare-earth element-F-Ba deposit at Rock Canyon Creek, both of which lack base metals but are spatially associated with the MVT deposits in the southern Rocky Mountains. Volcanogenic massive-sulfide deposits hosted in volcanic and mixed volcanic-sedimentary host rock settings were also examined. Through field geology, geochemical (lithogeochemistry, stable and radiogenic isotopes, fluid inclusions, and mineral chemistry), and geophysical (rock properties, magnetotelluric, and seismic) tools, the TGI research contributions have advanced genetic and exploration models for volcanic- and sedimentary-hosted base-metal deposits and developed new laboratory, geophysical, and field techniques to support exploration.
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Daudelin, Francois, Lina Taing, Lucy Chen, Claudia Abreu Lopes, Adeniyi Francis Fagbamigbe, and Hamid Mehmood. Mapping WASH-related disease risk: A review of risk concepts and methods. United Nations University Institute for Water, Environment and Health, December 2021. http://dx.doi.org/10.53328/uxuo4751.
Повний текст джерелаАнотація:
The report provides a review of how risk is conceived of, modelled, and mapped in studies of infectious water, sanitation, and hygiene (WASH) related diseases. It focuses on spatial epidemiology of cholera, malaria and dengue to offer recommendations for the field of WASH-related disease risk mapping. The report notes a lack of consensus on the definition of disease risk in the literature, which limits the interpretability of the resulting analyses and could affect the quality of the design and direction of public health interventions. In addition, existing risk frameworks that consider disease incidence separately from community vulnerability have conceptual overlap in their components and conflate the probability and severity of disease risk into a single component. The report identifies four methods used to develop risk maps, i) observational, ii) index-based, iii) associative modelling and iv) mechanistic modelling. Observational methods are limited by a lack of historical data sets and their assumption that historical outcomes are representative of current and future risks. The more general index-based methods offer a highly flexible approach based on observed and modelled risks and can be used for partially qualitative or difficult-to-measure indicators, such as socioeconomic vulnerability. For multidimensional risk measures, indices representing different dimensions can be aggregated to form a composite index or be considered jointly without aggregation. The latter approach can distinguish between different types of disease risk such as outbreaks of high frequency/low intensity and low frequency/high intensity. Associative models, including machine learning and artificial intelligence (AI), are commonly used to measure current risk, future risk (short-term for early warning systems) or risk in areas with low data availability, but concerns about bias, privacy, trust, and accountability in algorithms can limit their application. In addition, they typically do not account for gender and demographic variables that allow risk analyses for different vulnerable groups. As an alternative, mechanistic models can be used for similar purposes as well as to create spatial measures of disease transmission efficiency or to model risk outcomes from hypothetical scenarios. Mechanistic models, however, are limited by their inability to capture locally specific transmission dynamics. The report recommends that future WASH-related disease risk mapping research: - Conceptualise risk as a function of the probability and severity of a disease risk event. Probability and severity can be disaggregated into sub-components. For outbreak-prone diseases, probability can be represented by a likelihood component while severity can be disaggregated into transmission and sensitivity sub-components, where sensitivity represents factors affecting health and socioeconomic outcomes of infection. -Employ jointly considered unaggregated indices to map multidimensional risk. Individual indices representing multiple dimensions of risk should be developed using a range of methods to take advantage of their relative strengths. -Develop and apply collaborative approaches with public health officials, development organizations and relevant stakeholders to identify appropriate interventions and priority levels for different types of risk, while ensuring the needs and values of users are met in an ethical and socially responsible manner. -Enhance identification of vulnerable populations by further disaggregating risk estimates and accounting for demographic and behavioural variables and using novel data sources such as big data and citizen science. This review is the first to focus solely on WASH-related disease risk mapping and modelling. The recommendations can be used as a guide for developing spatial epidemiology models in tandem with public health officials and to help detect and develop tailored responses to WASH-related disease outbreaks that meet the needs of vulnerable populations. The report’s main target audience is modellers, public health authorities and partners responsible for co-designing and implementing multi-sectoral health interventions, with a particular emphasis on facilitating the integration of health and WASH services delivery contributing to Sustainable Development Goals (SDG) 3 (good health and well-being) and 6 (clean water and sanitation).
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Harris, L. B., P. Adiban, and E. Gloaguen. The role of enigmatic deep crustal and upper mantle structures on Au and magmatic Ni-Cu-PGE-Cr mineralization in the Superior Province. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328984.
Повний текст джерелаАнотація:
Aeromagnetic and ground gravity data for the Canadian Superior Province, filtered to extract long wavelength components and converted to pseudo-gravity, highlight deep, N-S trending regional-scale, rectilinear faults and margins to discrete, competent mafic or felsic granulite blocks (i.e. at high angles to most regional mapped structures and sub-province boundaries) with little to no surface expression that are spatially associated with lode ('orogenic') Au and Ni-Cu-PGE-Cr occurrences. Statistical and machine learning analysis of the Red Lake-Stormy Lake region in the W Superior Province confirms visual inspection for a greater correlation between Au deposits and these deep N-S structures than with mapped surface to upper crustal, generally E-W trending, faults and shear zones. Porphyry Au, Ni, Mo and U-Th showings are also located above these deep transverse faults. Several well defined concentric circular to elliptical structures identified in the Oxford Stull and Island Lake domains along the S boundary of the N Superior proto-craton, intersected by N- to NNW striking extensional fractures and/or faults that transect the W Superior Province, again with little to no direct surface or upper crustal expression, are spatially associated with magmatic Ni-Cu-PGE-Cr and related mineralization and Au occurrences. The McFaulds Lake greenstone belt, aka. 'Ring of Fire', constitutes only a small, crescent-shaped belt within one of these concentric features above which 2736-2733 Ma mafic-ultramafic intrusions bodies were intruded. The Big Trout Lake igneous complex that hosts Cr-Pt-Pd-Rh mineralization west of the Ring of Fire lies within a smaller concentrically ringed feature at depth and, near the Ontario-Manitoba border, the Lingman Lake Au deposit, numerous Au occurrences and minor Ni showings, are similarly located on concentric structures. Preliminary magnetotelluric (MT) interpretations suggest that these concentric structures appear to also have an expression in the subcontinental lithospheric mantle (SCLM) and that lithospheric mantle resistivity features trend N-S as well as E-W. With diameters between ca. 90 km to 185 km, elliptical structures are similar in size and internal geometry to coronae on Venus which geomorphological, radar, and gravity interpretations suggest formed above mantle upwellings. Emplacement of mafic-ultramafic bodies hosting Ni-Cr-PGE mineralization along these ringlike structures at their intersection with coeval deep transverse, ca. N-S faults (viz. phi structures), along with their location along the margin to the N Superior proto-craton, are consistent with secondary mantle upwellings portrayed in numerical models of a mantle plume beneath a craton with a deep lithospheric keel within a regional N-S compressional regime. Early, regional ca. N-S faults in the W Superior were reactivated as dilatational antithetic (secondary Riedel/R') sinistral shears during dextral transpression and as extensional fractures and/or normal faults during N-S shortening. The Kapuskasing structural zone or uplift likely represents Proterozoic reactivation of a similar deep transverse structure. Preservation of discrete faults in the deep crust beneath zones of distributed Neoarchean dextral transcurrent to transpressional shear zones in the present-day upper crust suggests a 'millefeuille' lithospheric strength profile, with competent SCLM, mid- to deep, and upper crustal layers. Mechanically strong deep crustal felsic and mafic granulite layers are attributed to dehydration and melt extraction. Intra-crustal decoupling along a ductile décollement in the W Superior led to the preservation of early-formed deep structures that acted as conduits for magma transport into the overlying crust and focussed hydrothermal fluid flow during regional deformation. Increase in the thickness of semi-brittle layers in the lower crust during regional metamorphism would result in an increase in fracturing and faulting in the lower crust, facilitating hydrothermal and carbonic fluid flow in pathways linking SCLM to the upper crust, a factor explaining the late timing for most orogenic Au. Results provide an important new dataset for regional prospectively mapping, especially with machine learning, and exploration targeting for Au and Ni-Cr-Cu-PGE mineralization. Results also furnish evidence for parautochthonous development of the S Superior Province during plume-related rifting and cannot be explained by conventional subduction and arc-accretion models.
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Lazonick, William. Investing in Innovation: A Policy Framework for Attaining Sustainable Prosperity in the United States. Institute for New Economic Thinking Working Paper Series, March 2022. http://dx.doi.org/10.36687/inetwp182.
Повний текст джерелаАнотація:
“Sustainable prosperity” denotes an economy that generates stable and equitable growth for a large and growing middle class. From the 1940s into the 1970s, the United States appeared to be on a trajectory of sustainable prosperity, especially for white-male members of the U.S. labor force. Since the 1980s, however, an increasing proportion of the U.S labor force has experienced unstable employment and inequitable income, while growing numbers of the business firms upon which they rely for employment have generated anemic productivity growth. Stable and equitable growth requires innovative enterprise. The essence of innovative enterprise is investment in productive capabilities that can generate higher-quality, lower-cost goods and services than those previously available. The innovative enterprise tends to be a business firm—a unit of strategic control that, by selling products, must make profits over time to survive. In a modern society, however, business firms are not alone in making investments in the productive capabilities required to generate innovative goods and services. Household units and government agencies also make investments in productive capabilities upon which business firms rely for their own investment activities. When they work in a harmonious fashion, these three types of organizations—household units, government agencies, and business firms—constitute “the investment triad.” The Biden administration’s Build Back Better agenda to restore sustainable prosperity in the United States focuses on investment in productive capabilities by two of the three types of organizations in the triad: government agencies, implementing the Infrastructure Investment and Jobs Act, and household units, implementing the yet-to-be-passed American Families Act. Absent, however, is a policy agenda to encourage and enable investment in innovation by business firms. This gaping lacuna is particularly problematic because many of the largest industrial corporations in the United States place a far higher priority on distributing the contents of the corporate treasury to shareholders in the form of cash dividends and stock buybacks for the sake of higher stock yields than on investing in the productive capabilities of their workforces for the sake of innovation. Based on analyzes of the “financialization” of major U.S. business corporations, I argue that, unless Build Back Better includes an effective policy agenda to encourage and enable corporate investment in innovation, the Biden administration’s program for attaining stable and equitable growth will fail. Drawing on the experience of the U.S. economy over the past seven decades, I summarize how the United States moved toward stable and equitable growth from the late 1940s through the 1970s under a “retain-and-reinvest” resource-allocation regime at major U.S. business firms. Companies retained a substantial portion of their profits to reinvest in productive capabilities, including those of career employees. In contrast, since the early 1980s, under a “downsize-and-distribute” corporate resource-allocation regime, unstable employment, inequitable income, and sagging productivity have characterized the U.S. economy. In transition from retain-and-reinvest to downsize-and-distribute, many of the largest, most powerful corporations have adopted a “dominate-and-distribute” resource-allocation regime: Based on the innovative capabilities that they have previously developed, these companies dominate market segments of their industries but prioritize shareholders in corporate resource allocation. The practice of open-market share repurchases—aka stock buybacks—at major U.S. business corporations has been central to the dominate-and-distribute and downsize-and-distribute regimes. Since the mid-1980s, stock buybacks have become the prime mode for the legalized looting of the business corporation. I call this looting process “predatory value extraction” and contend that it is the fundamental cause of the increasing concentration of income among the richest household units and the erosion of middle-class employment opportunities for most other Americans. I conclude the paper by outlining a policy framework that could stop the looting of the business corporation and put in place social institutions that support sustainable prosperity. The agenda includes a ban on stock buybacks done as open-market repurchases, radical changes in incentives for senior corporate executives, representation of workers and taxpayers as directors on corporate boards, reform of the tax system to reward innovation and penalize financialization, and, guided by the investment-triad framework, government programs to support “collective and cumulative careers” of members of the U.S. labor force. Sustained investment in human capabilities by the investment triad, including business firms, would make it possible for an ever-increasing portion of the U.S. labor force to engage in the productive careers that underpin upward socioeconomic mobility, which would be manifested by a growing, robust, and hopeful American middle class.