Готові списки джерел за темами / Boundy, K A V

Добірка наукової літератури з теми "Boundy, K A V"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 29 січня 2023

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Статті в журналах з теми "Boundy, K A V"

1

Fleming-Vázquez, Nicholas. "Functional Correlation Bounds and Optimal Iterated Moment Bounds for Slowly-Mixing Nonuniformly Hyperbolic Maps." Communications in Mathematical Physics 391, no. 1 (February 2, 2022): 173–98. http://dx.doi.org/10.1007/s00220-022-04325-w.

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AbstractConsider a nonuniformly hyperbolic map $$ T:M\rightarrow M $$ T : M → M modelled by a Young tower with tails of the form $$ O(n^{-\beta }) $$ O ( n - β ) , $$ \beta >2 $$ β > 2 . We prove optimal moment bounds for Birkhoff sums $$ \sum _{i=0}^{n-1}v\circ T^i $$ ∑ i = 0 n - 1 v ∘ T i and iterated sums $$ \sum _{0\le i<j<n}v\circ T^i\, w\circ T^j $$ ∑ 0 ≤ i < j < n v ∘ T i w ∘ T j , where $$ v,w:M\rightarrow {{\mathbb {R}}} $$ v , w : M → R are (dynamically) Hölder observables. Previously iterated moment bounds were only known for $$ \beta >5$$ β > 5 . Our method of proof is as follows; (i) prove that $$ T$$ T satisfies an abstract functional correlation bound, (ii) use a weak dependence argument to show that the functional correlation bound implies moment estimates. Such iterated moment bounds arise when using rough path theory to prove deterministic homogenisation results. Indeed, by a recent result of Chevyrev, Friz, Korepanov, Melbourne & Zhang we have convergence to an Itô diffusion for fast-slow systems of the form $$\begin{aligned} x^{(n)}_{k+1}=x_k^{(n)}+n^{-1}a(x_k^{(n)},y_k)+n^{-1/2}b(x_k^{(n)},y_k) , \quad y_{k+1}=Ty_k \end{aligned}$$ x k + 1 ( n ) = x k ( n ) + n - 1 a ( x k ( n ) , y k ) + n - 1 / 2 b ( x k ( n ) , y k ) , y k + 1 = T y k in the optimal range $$ \beta >2$$ β > 2 .
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2

Weigel, A. Gambini, and T. S. Weigel. "On the orders of primitive linear P'-groups." Bulletin of the Australian Mathematical Society 48, no. 3 (December 1993): 495–521. http://dx.doi.org/10.1017/s0004972700015951.

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A group G ≤ GLK(V) is called K-primitive if there exists no non-trivial decomposition of V into a sum of K-spaces which is stabilised by G. We show that if V is a finite vector space and G a K-primitive subgroup of GLK(V) whose order is coprime to |V|, we can bound the order of G by |V|log2(|V|) apart from one exception. Later we use this result to obtain some lower bounds on the number of p–singular elements in terms of the group order and the minimal representation degree.
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3

Hernández Mira, Frank A., Ernesto Parra Inza, José M. Sigarreta Almira, and Nodari Vakhania. "Properties of the Global Total k-Domination Number." Mathematics 9, no. 5 (February 26, 2021): 480. http://dx.doi.org/10.3390/math9050480.

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A nonempty subset D⊂V of vertices of a graph G=(V,E) is a dominating set if every vertex of this graph is adjacent to at least one vertex from this set except the vertices which belong to this set itself. D⊆V is a total k-dominating set if there are at least k vertices in set D adjacent to every vertex v∈V, and it is a global total k-dominating set if D is a total k-dominating set of both G and G¯. The global total k-domination number of G, denoted by γktg(G), is the minimum cardinality of a global total k-dominating set of G, GTkD-set. Here we derive upper and lower bounds of γktg(G), and develop a method that generates a GTkD-set from a GT(k−1)D-set for the successively increasing values of k. Based on this method, we establish a relationship between γ(k−1)tg(G) and γktg(G), which, in turn, provides another upper bound on γktg(G).
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4

SHEIKHOLESLAMI, S. M., and L. VOLKMANN. "SIGNED TOTAL {K}-DOMINATION AND {K}-DOMATIC NUMBERS OF GRAPHS." Discrete Mathematics, Algorithms and Applications 04, no. 01 (March 2012): 1250006. http://dx.doi.org/10.1142/s1793830912500061.

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Анотація:
Let k be a positive integer, and let G be a simple graph with vertex set V(G). A function f : V(G) → {±1, ±2, …, ±k} is called a signed total {k}-dominating function if ∑u∈N(v) f(u) ≥ k for each vertex v ∈ V(G). A set {f1, f2, …, fd} of signed total {k}-dominating functions on G with the property that [Formula: see text] for each v∈V(G), is called a signed total {k}-dominating family (of functions) on G. The maximum number of functions in a signed total {k}-dominating family on G is the signed total {k}-domatic number of G, denoted by [Formula: see text]. Note that [Formula: see text] is the classical signed total domatic number dS(G). In this paper, we initiate the study of signed total k-domatic numbers in graphs, and we present some sharp upper bounds for [Formula: see text]. In addition, we determine [Formula: see text] for several classes of graphs. Some of our results are extensions of known properties of the signed total domatic number.
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5

Yang, Hong, Pu Wu, Sakineh Nazari-Moghaddam, Seyed Mahmoud Sheikholeslami, Xiaosong Zhang, Zehui Shao, and Yuan Yan Tang. "Bounds for signed double Roman k-domination in trees." RAIRO - Operations Research 53, no. 2 (April 2019): 627–43. http://dx.doi.org/10.1051/ro/2018043.

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Анотація:
Let k ≥ 1 be an integer and G be a simple and finite graph with vertex set V(G). A signed double Roman k-dominating function (SDRkDF) on a graph G is a function f:V(G) → {−1,1,2,3} such that (i) every vertex v with f(v) = −1 is adjacent to at least two vertices assigned a 2 or to at least one vertex w with f(w) = 3, (ii) every vertex v with f(v) = 1 is adjacent to at least one vertex w with f(w) ≥ 2 and (iii) ∑u∈N[v]f(u) ≥ k holds for any vertex v. The weight of a SDRkDF f is ∑u∈V(G) f(u), and the minimum weight of a SDRkDF is the signed double Roman k-domination number γksdR(G) of G. In this paper, we investigate the signed double Roman k-domination number of trees. In particular, we present lower and upper bounds on γksdR(T) for 2 ≤ k ≤ 6 and classify all extremal trees.
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6

Dehgardi, Nasrin, Maryam Atapour, and Abdollah Khodkar. "Twin signed k-domination numbers in directed graphs." Filomat 31, no. 20 (2017): 6367–78. http://dx.doi.org/10.2298/fil1720367d.

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Анотація:
Let D = (V;A) be a finite simple directed graph (digraph). A function f : V ? {-1,1} is called a twin signed k-dominating function (TSkDF) if f (N-[v]) ? k and f (N+[v]) ? k for each vertex v ? V. The twin signed k-domination number of D is ?* sk(D) = min{?(f)?f is a TSkDF of D}. In this paper, we initiate the study of twin signed k-domination in digraphs and present some bounds on ?* sk(D) in terms of the order, size and maximum and minimum indegrees and outdegrees, generalising some of the existing bounds for the twin signed domination numbers in digraphs and the signed k-domination numbers in graphs. In addition, we determine the twin signed k-domination numbers of some classes of digraphs.
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7

Kim, Kijung. "On k-rainbow domination in middle graphs." RAIRO - Operations Research 55, no. 6 (November 2021): 3447–58. http://dx.doi.org/10.1051/ro/2021163.

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Анотація:
Let G be a finite simple graph with vertex set V(G) and edge set E(G). A function f : V(G) → P({1,2,…,k}) is a k-rainbow dominating function on G if for each vertex v∈V(G) for which f(v) = ∅, it holds that ⋃u∈N(v) f(u) = {1,2,…,k}. The weight of a k-rainbow dominating function is the value ∑v∈V(G)|f(v)|. The k-rainbow domination number γrk (G) is the minimum weight of a k-rainbow dominating function on G. In this paper, we initiate the study of k-rainbow domination numbers in middle graphs. We define the concept of a middle k-rainbow dominating function, obtain some bounds related to it and determine the middle 3-rainbow domination number of some classes of graphs. We also provide upper and lower bounds for the middle 3-rainbow domination number of trees in terms of the matching number. In addition, we determine the 3-rainbow domatic number for the middle graph of paths and cycles.
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8

Shao, Zehui, Rija Erveš, Huiqin Jiang, Aljoša Peperko, Pu Wu, and Janez Žerovnik. "Double Roman Graphs in P(3k, k)." Mathematics 9, no. 4 (February 8, 2021): 336. http://dx.doi.org/10.3390/math9040336.

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Анотація:
A double Roman dominating function on a graph G=(V,E) is a function f:V→{0,1,2,3} with the properties that if f(u)=0, then vertex u is adjacent to at least one vertex assigned 3 or at least two vertices assigned 2, and if f(u)=1, then vertex u is adjacent to at least one vertex assigned 2 or 3. The weight of f equals w(f)=∑v∈Vf(v). The double Roman domination number γdR(G) of a graph G is the minimum weight of a double Roman dominating function of G. A graph is said to be double Roman if γdR(G)=3γ(G), where γ(G) is the domination number of G. We obtain the sharp lower bound of the double Roman domination number of generalized Petersen graphs P(3k,k), and we construct solutions providing the upper bounds, which gives exact values of the double Roman domination number for all generalized Petersen graphs P(3k,k). This implies that P(3k,k) is a double Roman graph if and only if either k≡0 (mod 3) or k∈{1,4}.
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9

Koam, Ali N. A., Ali Ahmad, Martin Bača, and Andrea Semaničová-Feňovčíková. "Modular edge irregularity strength of graphs." AIMS Mathematics 8, no. 1 (2022): 1475–87. http://dx.doi.org/10.3934/math.2023074.

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<abstract><p>For a simple graph $ G = (V, E) $ with the vertex set $ V(G) $ and the edge set $ E(G) $, a vertex labeling $ \varphi: V(G) \to \{1, 2, \dots, k\} $ is called a $ k $-labeling. The weight of an edge under the vertex labeling $ \varphi $ is the sum of the labels of its end vertices and the modular edge-weight is the remainder of the division of this sum by $ |E(G)| $. A vertex $ k $-labeling is called a modular edge irregular if for every two different edges their modular edge-weights are different. The maximal integer $ k $ minimized over all modular edge irregular $ k $-labelings is called the modular edge irregularity strength of $ G $. In the paper we estimate the bounds on the modular edge irregularity strength and for caterpillar, cycle, friendship graph and $ n $-sun we determine the precise values of this parameter that prove the sharpness of the lower bound.</p></abstract>
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10

Kuziak, Dorota, Iztok Peterin, and Ismael Yero. "Computing the (k-)monopoly number of direct product of graphs." Filomat 29, no. 5 (2015): 1163–71. http://dx.doi.org/10.2298/fil1505163k.

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Let G = (V,E) be a simple graph without isolated vertices and minimum degree ?(G), and let k ? {1-??(G)/2? ,..., ?(G)/2c?} be an integer. Given a set M ? V, a vertex v of G is said to be k-controlled by M if ?M(v)? ?(v)/2 + k where ?M(v) represents the quantity of neighbors v has in M and ?(v) the degree of v. The set M is called a k-monopoly if it k-controls every vertex v of G. The minimum cardinality of any k-monopoly is the k-monopoly number of G. In this article we study the k-monopoly number of direct product graphs. Specifically we obtain tight lower and upper bounds for the k-monopoly number of direct product graphs in terms of the k-monopoly numbers of its factors. Moreover, we compute the exact value for the k-monopoly number of several families of direct product graphs.
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Дисертації з теми "Boundy, K A V"

1

Kohút, Jiří. "Srovnání pulsujícího proudění newtonské a ne-newtonské kapaliny v komplexní geometrii." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-416445.

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This master's thesis deals with pulsating flow of Newtonian and non-Newtonian fluid. Theoretical part represents necessary theoretical knowledge for pulsating flow and understanding of non-Newtonian behaviour. Furthermore the thesis focus is directed on numerical simulation of pulsating flow in straight, ideally rigid tube and in patient-specific model of human artery, more precisely in carotid. Two methods are used: numerical solution based on finite volume method (FVM) and also analytical solution using Bessel functions by Womersley. Results are validated against experimental measurements of velocity profiles by particle image velocity method (PIV). The agreement between numerical and experimental data with consideration of PIV inaccuracy was was very good from both point of views - qualitative and quantitative. Numerical solution also compare influence of turbulence and non-Newtonian behaviour towards base (laminar flow, Newtonian fluid). Developed methodology is then applied on patient-specific model of carotid, which was renovated from computed tomography. Measurements in vivo in human arteries is very expensive and often invasive. Because of that measurement outputs are limited, most of the time on pressure and flow. Computational fluid dynamics (CFD) is non-invasive and outputs are through whole domain. Due to these advantages CFD significantly contributes to understanding of hemodynamics influence in cardiovascular diseases.
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2

Nováková, Barbora. "K otázkám hudebních pořadů v ČT." Master's thesis, Akademie múzických umění v Praze. Hudební fakulta AMU. Knihovna, 2008. http://www.nusl.cz/ntk/nusl-78186.

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Master thesis with title "Questions about music programmes at the Czech television" discuss music, dance and drama programmes made by the Czechoslovak television - Main redaction of musical broadcasting in years 1980 - 1990 with music, dance and drama programmes, which produced Czech television - Theatre and Music Department and Producer center of art programmes (Creative group of Radim Smetana and Vítězslav Sýkora) in the years 2000 - 2005. There few poins of view. One of the most important was focused on comparison in the view of content form and content typology (concert, concert with comment, symphonic music, chamber music, brass band, jazz, rock). Than were set against documents as ČT Statute, Idea Thematic Plan from the years 1980 - 1990 and Plan Direction from the years 1986 - 1990.
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3

Buchta, Vojtěch. "Nové přístupu k designu v pohřebnictví." Master's thesis, Vysoké učení technické v Brně. Fakulta výtvarných umění, 2010. http://www.nusl.cz/ntk/nusl-232281.

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4

Hobza, Alexandr. "ČR v procesu asociace k EU." Doctoral thesis, Vysoká škola ekonomická v Praze, 2007. http://www.nusl.cz/ntk/nusl-2298.

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Анотація:
Tato dizertační práce se zaměřuje na problematiku koordinace strukturálních reforem v kontextu přičleňování ČR k EU. Zkoumá, zda proces koordinace reforem v EU, navržený pro ?staré? členské země je aktuální i pro ČR, jakožto ?novou? členskou zemi, která prošla procesem transformace z centrálně plánované na tržní ekonomiku. Práce vytváří všeobecný analytický rámec, který bere do úvahy nejen potenciál koordinace politik ovlivnit obsahovou stránku národních reformních strategií, ale také její potenciál vytvořit vhodné podmínky pro jejich implementaci. Uzavírá, že Lisabonská strategie koordinace reforem může přispět implementaci potřebných strukturálních reforem, ačkoliv je to podmíněno řadou faktorů.
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5

Kašparová, Pavlína. "Povolenky k emisím CO2 v účetnictví." Master's thesis, Vysoká škola ekonomická v Praze, 2007. http://www.nusl.cz/ntk/nusl-4685.

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The graduation theses is focused on problems of emission rights. The graduation theses is describing when and where has been firstly started talking about emission rights and why, what has been developement of emission rights prices on the stock markets since their implementation in 2005 and what was the impact on the financial statements. The main part of the gradiation theses is about financial reporting. There is described a few of possible methods how to enter it in the books with concrete examples each of them. There is not missing historically first sollution of the emission rights bookkeeping, interpretation IFRIC 3.
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6

Hrádková, Eva. "Motivace k trenérství v atletických klubech." Master's thesis, Vysoká škola ekonomická v Praze, 2012. http://www.nusl.cz/ntk/nusl-125042.

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The aim of the thesis is to find motivational sources of contemparary trainers at the Athletic Club Stodulky Praha. Subsequently, these values are used to compare with the motivational profile ot the defined target groups in order to compare the similarity of these profiles, which should help to determine whether in these defined target groups might be found some potential new athletics coaches.
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7

Hýl, Petr. "Slovinské národní divadlo v Lublani." Master's thesis, Vysoké učení technické v Brně. Fakulta architektury, 2009. http://www.nusl.cz/ntk/nusl-215582.

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8

Guruncz, Josef. "Rozdíly v hereckém přístupu k shakespearovskému textu v Česku a v anglosaských zemích." Master's thesis, Akademie múzických umění v Praze. Divadelní fakulta AMU. Knihovna, 2010. http://www.nusl.cz/ntk/nusl-79373.

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This thesis is an analysis of the differences which exist in an actor´s and director´s approach towards Shakespeare´s texts in Czech and Anglo-Saxon countries. The aim of the thesis is not a literary content analysis; emphasis is put on the approach of actors or other theatrical artists towards Shakespeare´s plays. By using the word approach in this context it is meant, how actors, directors or production teams work with Shakespeare´s texts and to what extent they are inspired by it during rehearsal. The main method of research is interviews with theatre artists from both cultures and a significant part of the thesis contains the synthesis of the interviews. The author´s own experience, information gained from relevant literature and opinions from the people with whom the interviews have been led has shown, that differences in an actor´s and director´s approach towards Shakespeare´s text in these cultures are predominantly a result of translation, socio-political development and a diverse way of perception of theatres in the countries.
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9

Fic, Jiří. "Virtuální prostředí přístupu k uzlům v PlanetLab." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2008. http://www.nusl.cz/ntk/nusl-236003.

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PlanetLab as a distributed systems testbed offers a unique opportunity for developing and testing new applications useful for future Internet. This work brings up a scheme and a solution of the problem with accessing PlanetLab by a larger group of students e.g. for the purpose of solving their courseworks. A designed system empowers its administrator to create and control virtual user accounts which provide possibility for all its users to connect to selected nodes in the PlanetLab.
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10

Jiráková, Eliška. "Investování v ČR ve vztahu k HDP." Master's thesis, Vysoká škola ekonomická v Praze, 2009. http://www.nusl.cz/ntk/nusl-17021.

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Investment has undergone dramatic development lately and people are looking more and more new ways to evaluate their funds to protect them from the effects of inflation or as easy to get rich This work deals with investment opportunities for Czechs in relation to their income and appreciation in relation to the welfare of the country measured by GDP. The first part describes the history of investment and investment opportunities. Subsequently, the work deals with the development of GDP and of the allocation of funds in various investment instruments in the development of GDP. The last part is devoted to modeling the development of further investment on GDP in the CR.
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Книги з теми "Boundy, K A V"

1

Optimizat͡s︡ii͡a︡ v ėllipticheskikh granichnykh zadachakh s prilozhenii͡a︡mi k mekhanike. Moskva: "Nauka", Glav. red. fiziko-matematicheskoĭ lit-ry, 1987.

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2

V Rossii︠u︡, v Konstantinovo, k Eseninu: Fotoalʹbom. 2-ге вид. Ri︠a︡zanʹ: Pressa, 2009.

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3

Vysokov, V. V. Privatizat͡s︡ii͡a︡ v Rossii: Putʹ k bogatstvu?--k bankrotstvu? Rostov-na-Donu: Rostovskiĭ-na-Donu in-t narodnogo kho-va, 1994.

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4

Suėtin, A. S. Stupeni k masterstvu v shakhmatakh. Moskva: TOO "Novina", 1998.

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5

Schmittroth, Linda. Eureka (v.4 K-O)! New York: UXL, 1995.

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6

Lenderová, Milena. K hříchu i k modlitbě: Žena v minulém století. Praha: Mladá fronta, 1999.

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7

Mukashev, Zii︠a︡ Atashevich. Poni︠a︡tie "pravo" v teorii K. Marksa. Almaty: Arkaim, 2002.

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8

A, Filimonov A., ed. V odnom stroi͡u︡, k edinoĭ t͡s︡eli. Minsk: "Nauka i tekhnika", 1985.

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9

Proekt podderzhki SMI stran T︠S︡entralʹnoĭ Azii. Dostup k informat︠s︡ii v T︠S︡entralʹnoĭ Azii. Bishkek: Cimera, 2004.

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10

Kosals, L. Ya. Sotsiologiya perekhoda k rȳnku v Rossii. Moskva: Éditorial URSS, 1998.

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Частини книг з теми "Boundy, K A V"

1

Lyons, James R., and Thomas J. Ahrens. "Terrestrial Acidification at the K/T Boundary." In High-Pressure Shock Compression of Solids V, 181–97. New York, NY: Springer New York, 2003. http://dx.doi.org/10.1007/978-1-4613-0011-3_8.

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2

Gramlich, Ludwig, Peter Gluchowski, Andreas Horsch, Klaus Schäfer, and Gerd Waschbusch. "V." In Gabler Banklexikon (K – Z), 2055–182. Wiesbaden: Springer Fachmedien Wiesbaden, 2020. http://dx.doi.org/10.1007/978-3-658-26757-5_12.

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3

Petrides, Konstantinos Vassilis. "Petrides, K. V." In Encyclopedia of Personality and Individual Differences, 3904–7. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-24612-3_1957.

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Vázquez-Cedeira, Marta, Diana M. Monsalve, Marta Sanz-García, Pedro A. Lazo, Thierry Galli, Véronique Proux-Gillardeaux, Xosé R. Bustelo, et al. "v-K-Ras." In Encyclopedia of Signaling Molecules, 1984. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-0461-4_101459.

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Petrides, Konstantinos Vassilis. "Petrides, K. V." In Encyclopedia of Personality and Individual Differences, 1–4. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-28099-8_1957-1.

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6

Sriram, M. S. "K. V. Sarma (1919–2005)." In Studies in the History of Indian Mathematics, 5–7. Gurgaon: Hindustan Book Agency, 2010. http://dx.doi.org/10.1007/978-93-86279-49-1_2.

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7

Dahlke, Hans. "Koyo-K-V-SR-Wälzlager." In Handbuch Wälzlager-Technik, 550–66. Wiesbaden: Vieweg+Teubner Verlag, 1994. http://dx.doi.org/10.1007/978-3-663-01972-5_29.

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Matsuura, Kiyotaka, and H. Yamauchi. "Physical Properties of (Ba, K) NiS2." In Advances in Superconductivity V, 123–26. Tokyo: Springer Japan, 1993. http://dx.doi.org/10.1007/978-4-431-68305-6_25.

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9

Oldham, Keith B., Jan C. Myland, and Jerome Spanier. "The Macdonald Function K v (x)." In An Atlas of Functions, 527–36. New York, NY: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-48807-3_52.

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10

Narnhofer, Heide. "Dynamical entropy, quantum K-systems and clustering." In Quantum Probability and Applications V, 286–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/bfb0085521.

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Тези доповідей конференцій з теми "Boundy, K A V"

1

Araujo, Julio, Alexandre Cezar, Carlos Vinícius Gomes Costa Lima, Vinicius Fernandes Dos Santos, and Ana Shirley Ferreira Silva. "Proper Orientations of Chordal Graphs." In Encontro de Teoria da Computação. Sociedade Brasileira de Computação - SBC, 2020. http://dx.doi.org/10.5753/etc.2020.11080.

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An orientation D of a graph G = (V, E) is a digraph obtained from G by replacing each edge by exactly one of the two possible arcs with the same end vertices. For each v ∈ V(G), the indegree of v in D, denoted by dD−(v), is the number of arcs with head v in D. An orientation D of G is proper if dD−(u) ≠ dD−(v), for all uv ∈ E(G). An orientation with maximum indegree at most k is called a k-orientation. The proper orientation number of G, denoted by χ→(G), is the minimum integer k such that G admits a proper k-orientation. We prove that determining whether χ→(G) ≤ k is NP-complete for chordal graphs of bounded diameter. We also present a tight upper bound for χ→(G) on split graphs and a linear-time algorithm for quasi-threshold graphs.
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2

Weffort-Santos, C. A., and L. L. C. Pedrosa. "(Star, k)-colourings of graphs with bounded treewidth." In Encontro de Teoria da Computação. Sociedade Brasileira de Computação - SBC, 2020. http://dx.doi.org/10.5753/etc.2020.11085.

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We study a generalization of graph colouring define as follows. Given a graph G, a (star, k)-colouring of G is a colouring c : V(G) → {1, ..., k} such that every colour class induces a star. We propose an O*(2^(O(tw))k^(tw)-time algorithm that decides whether a graph G of treewidth at most tw admits a (star, k)-colouring. This resolves an open problem posed by Angelini et al. in 2017. Our approach can be extended to other defective colouring models.
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3

Peng, Mark M., and Fred J. Moody. "Natural Frequencies in Pipes With Orifice Terminations." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-55039.

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Acoustic resonance frequencies help identify which pipe segments in a complex piping system are likely to undergo forced vibration. This study focuses on a pipe with a sinusoidal pressure disturbance imposed at one end on an otherwise steady flow, with the other end of the pipe terminating at an orifice. In order to determine the natural acoustic frequencies of this scenario, it is not obvious whether to model the boundary condition at the orifice as an open or closed pipe, or somewhere in between. The results of this study show how the natural frequencies in a pipe segment are related to the loss coefficient K in three different categories. First, when K is less than C/V, where C is the speed of sound and V is the mean fluid velocity, the natural acoustic frequency resembles that of an open pipe, with the amplitude that grows to a limiting value. Second, when K is greater than C/V, the natural frequency corresponds to a closed pipe, and the amplitude also grows to a limiting value. Lastly, when K is equal to C/V, disturbance will propagate to the orifice without exciting a resonance as if pipe were infinitely long.
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4

Botler, Fábio, Wanderson Lomenha, and João Pedro de Souza. "On the maximum number of edges in a graph with prescribed walk-nonrepetitive chromatic number." In Encontro de Teoria da Computação. Sociedade Brasileira de Computação - SBC, 2022. http://dx.doi.org/10.5753/etc.2022.222730.

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Fix a coloring c: V(G) → N of the vertices of a graph G and let W=v_1 ... v_{2r} be a walk in G. We say that W is repetitive (with respect to c) if c(v_i) = c(v_{i+r}) for i = 1,..., r; and that W is boring if v_i=v_{i+r}, for every i = 1,...,r. Finally, we say that c is a walk-nonrepetitive coloring of G if every repetitive walk is boring, and we denote by σ(G) the walk-nonrepetitive chromatic number, i.e., the minimum number of colors in a walk-nonrepetitive coloring of G. In this paper we explore the maximum number of edges in a graph G with n vertices for which σ(G) = k, for k≥ 4. In [Barát and Wood 2008] it was shown that e(G) ≤ (1/2)(k -1)n. We prove that the corresponding extremal graph is unique. More specifically, we show that e(G) ≤ (1/2)(k -1)n if and only if G is a union of disjoint copies of K_k. We also show that this upper bound can be improved for connected graphs for the case k = 4: if G is a connected graph for which σ(G) = 4 and |V(G)| ≥ 5, then e(G) ≤ (4/3)|V(G)|.
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5

Gu, Z., and M. A. R. Sharif. "Simulation of Two-Dimensional Turbulent Recirculating Flow Field Behind a V-Shaped Bluff Body." In ASME 1994 International Computers in Engineering Conference and Exhibition and the ASME 1994 8th Annual Database Symposium collocated with the ASME 1994 Design Technical Conferences. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/cie1994-0459.

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Abstract The two-dimensional turbulent recirculating flow fields behind a V-shaped bluff body have been investigated numerically. Similar bluff bodies are used in combustion chambers for flame stabilization. The governing transport equations in conservative form are solved by a pressure based predictor-corrector method. The standard k-ϵ turbulence closure model and a boundary fitted multi-block curvilinear grid system are used in the computation. The code is validated against turbulent flow over a backward facing step problem. The predicted flow field behind the bluff body is also compared with experiment. It is found that while the qualitative features of the flow are well predicted, there is quantitative disagreement between the measurement and prediction. This disagreement can be partially attributed to the k-ϵ turbulence model which is known to be inadequate for recirculating flows. Parametric investigation of the flow field by varying the shape and size of the bluff body is also performed and the results are reported.
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6

Gupta, Sushmita, Sanjukta Roy, Saket Saurabh, and Meirav Zehavi. "When Rigging a Tournament, Let Greediness Blind You." In Twenty-Seventh International Joint Conference on Artificial Intelligence {IJCAI-18}. California: International Joint Conferences on Artificial Intelligence Organization, 2018. http://dx.doi.org/10.24963/ijcai.2018/38.

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A knockout tournament is a standard format of competition, ubiquitous in sports, elections and decision making. Such a competition consists of several rounds. In each round, all players that have not yet been eliminated are paired up into matches. Losers are eliminated, and winners are raised to the next round, until only one winner exists. Given that we can correctly predict the outcome of each potential match (modelled by a tournament D), a seeding of the tournament deterministically determines its winner. Having a favorite player v in mind, the Tournament Fixing Problem (TFP) asks whether there exists a seeding that makes v the winner. Aziz et al. [AAAI’14] showed that TFP is NP-hard. They initiated the study of the parameterized complexity of TFP with respect to the feedback arc set number k of D, and gave an XP-algorithm (which is highly inefficient). Recently, Ramanujan and Szeider [AAAI’17] showed that TFP admits an FPT algorithm, running in time 2^{ O(k^2 log k)} n ^{O(1)}. At the heart of this algorithm is a translation of TFP into an algebraic system of equations, solved in a black box fashion (by an ILP solver). We present a fresh, purely combinatorial greedy solution. We rely on new insights into TFP itself, which also results in the better running time bound of 2^{ O(k log k)} n^{ O(1)} . While our analysis is intricate, the algorithm itself is surprisingly simple.
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7

Mislevy, Scott P., and Ting Wang. "The Effects of Adverse Pressure Gradients on Momentum and Thermal Structures in Transitional Boundary Layers: Part 2 — Fluctuation Quantities." In ASME 1995 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/95-gt-005.

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The effects of adverse pressure gradients on the thermal and momentum characteristics of a heated transitional boundary layer were investigated with free-stream turbulence ranging from 0.3 to 0.6%. Boundary layer measurements were conducted for two constant K cases, K1=−0.51 × 10−6 and K2=−1.05 × 10−6. The fluctuation quantities, u′, v′, t′, the Reynolds shear stress (uv¯), and the Reynolds heat fluxes (vt¯ and ut¯) were measured. In general, u′/U∞, v′/U∞, and vt¯ have higher values across the boundary layer for the adverse pressure-gradient cases than they do for the baseline case (K=0). The development of v′ for the adverse pressure gradients was more actively involved than that of the baseline. In the early transition region, the Reynolds shear stress distribution for the K2 case showed a near-wall region of high-turbulent shear generated at Y+=7. At stations farther downstream, this near-wall shear reduced in magnitude, while a second region of high-turbulent shear developed at Y+=70. For the baseline case, however, the maximum turbulent shear in the transition region was generated at Y+=70, and no near-wall high-shear region was seen. Stronger adverse pressure gradients appear to produce more uniform and higher t′ in the near-wall region (Y,+<20) in both transitional and turbulent boundary layers. The instantaneous velocity signals did not show any clear turbulent/non-turbulent demarcations in the transition region. Increasingly stronger adverse pressure gradients seemed to produce large non-turbulent unsteadiness (or instability waves) at a similar magnitude as the turbulent fluctuations such that the production of turbulent spots was obscured. The turbulent spots could not be identified visually or through conventional conditional-sampling schemes. In addition, the streamwise evolution of eddy viscosity, turbulent thermal diffusivity, and Prt are also presented.
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8

Panta Pazos, Rube´n. "Hybrid Methods Approach for Solving Problems in Transport Theory." In 16th International Conference on Nuclear Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/icone16-48400.

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In this work the hybrid methods approach is introduced in order to solve some problems in Transport Theory for different geometries. The transport equation is written as: ∂ψ∂t(x,v,t)+v·∇ψ(x,v,t)+h(x,μ)ψ(x,v,t)==∫Vk(x,v,v′)ψ(x,v′,t)dv′+q(x,v,t),inΩTψ(x,v,0)=φ0(x,v),in∂Ω×Vψ(x,v,t)=φ(x,v,t),in∂Ω×V×R(1) where x represents the spatial variable in a domain D, v an element of a compact set V, ψ is the angular flux, h(x, v) the collision frequency, k(x, v, v’) the scattering kernel function and q(x, v) the source function. If ψ does not depend on the time, it is said that the problem (1) is a steady transport problem. Once the problem is defined, including the boundary conditions, it is disposed a set of chained methods in order to solve the problem. Between the different alternatives, an optimal scheme for the resolution is chosen. Two illustrations are given. For two-dimensional geometries it is employed a hybrid analytical and numerical method, for transport problems: conformal mapping first, then the solution in a proper geometry (rectangular for example). Each of the following two techniques is then applied, Krylov subspaces method or spectral-LTSN method. For three-dimensional problems also it is used a hybrid analytical and numerical method, for problems with more complex geometries: a homotopy between the original boundaries (piecewise surfaces) and another (a parallelepiped for example). Then each of two techniques are applied, Krylov subspaces method or nodal-LTSN method. In this case, the design of new geometries for reactors is a straightforward task. En each case, the domain consist of three regions, one of the source, other is the void region and the third one is a shield domain. The results are obtained both with an algebraic computer system and with a language of high level. An important extension is the study and treatment of transport problems for domains with irregular geometries, between them Lipschitzian domains. One remarkable fact of this work is the combination of different modeling and resolution techniques to solve some transport problems.
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9

Gupta, Sushmita, Pallavi Jain, Saket Saurabh, and Nimrod Talmon. "Even More Effort Towards Improved Bounds and Fixed-Parameter Tractability for Multiwinner Rules." In Thirtieth International Joint Conference on Artificial Intelligence {IJCAI-21}. California: International Joint Conferences on Artificial Intelligence Organization, 2021. http://dx.doi.org/10.24963/ijcai.2021/31.

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Multiwinner elections have proven to be a fruitful research topic with many real world applications. We contribute to this line of research by improving the state of the art regarding the computational complexity of computing good committees. More formally, given a set of candidates C, a set of voters V, each ranking the candidates according to their preferences, and an integer k; a multiwinner voting rule identifies a committee of size k, based on these given voter preferences. In this paper we consider several utilitarian and egailitarian OWA (ordered weighted average) scoring rules, which are an extensively researched family of rules (and a subfamily of the family of committee scoring rules). First, we improve the result of Betzler et al. [JAIR, 2013], which gave a O(n^n) algorithm for computing winner under the Chamberlin Courant rule (CC), where n is the number of voters; to a running time of O(2^n), which is optimal. Furthermore, we study the parameterized complexity of the Pessimist voting rule and describe a few tractable and intractable cases. Apart from such utilitarian voting rules, we extend our study and consider egalitarian median and egalitarian mean (both committee scoring rules), showing some tractable and intractable results, based on nontrivial structural observations.
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10

Joshi, Pranav, and Joseph Katz. "Experimental Investigation of Turbulent Boundary Layers Under Favorable Pressure Gradient." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30764.

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The goal of this research is to study the effect of favorable pressure gradient (FPG) on the near wall structures of a turbulent boundary layer on a smooth wall. 2D-PIV measurements have been performed in a sink flow, initially at a coarse resolution, to characterize the development of the mean flow and (under resolved) Reynolds stresses. Lack of self-similarity of mean velocity profiles shows that the boundary layer does not attain the sink flow equilibrium. In the initial phase of acceleration, the acceleration parameter, K = v/U2dU/dx, increases from zero to 0.575×10−6, skin friction coefficient decreases and mean velocity profiles show a log region, but lack universality. Further downstream, K remains constant, skin friction coefficient increases and the mean velocity profiles show a second log region away from the wall. In the initial part of the FPG region, all the Reynolds stress components decrease over the entire boundary layer. In the latter phase, they continue to decrease in the middle of the boundary layer, and increase significantly close to the wall (below y∼0.15δ), where they collapse when normalized with the local freestream velocity. Turbulence production and wallnormal transport, scaled with outer units, show self-similar profiles close to the wall in the constant K region. Spanwise-streamwise plane data shows evidence of low speed streaks in the log layer, with widths scaling with the boundary layer thickness.
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Звіти організацій з теми "Boundy, K A V"

1

Tan, Ping. Constraining |V(td)|/|V(ts)| Using Radiative Penguin B -> V(K*/rho/omega)gamma Decays. Office of Scientific and Technical Information (OSTI), March 2006. http://dx.doi.org/10.2172/877221.

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2

Jackson, Paul D. A Search for B+→ K+ Nu v$\bar{v}$. Office of Scientific and Technical Information (OSTI), January 2004. http://dx.doi.org/10.2172/922227.

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3

Hiser, A. L. Correlation of irradiation-induced transition temperature increases from C sub v and K sub Jc /K sub Ic data. Office of Scientific and Technical Information (OSTI), March 1990. http://dx.doi.org/10.2172/7038555.

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4

Toropov, P. B. K rezul'tatam issledovaniya semanticheskogo prostranstva ponyatiya «social'noe sodejstvie» i ego realizacii v onomastike Rossii. Ljournal, 2020. http://dx.doi.org/10.18411/2071-5331-2016-4-38-78-84.

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5

Slinker, S., G. Joyce, J. Krall, and M. Lampe. A Generalization of the K-V Equilibrium for an Intense, Relativistic Beam Propagating in a Solenoid. Fort Belvoir, VA: Defense Technical Information Center, February 1992. http://dx.doi.org/10.21236/ada247067.

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6

Massafferri Rodrigues, Andre. Mass spectrum analysis of K- π+ from the semileptonic decay D+ → K- π+μ+v. Office of Scientific and Technical Information (OSTI), березень 2004. http://dx.doi.org/10.2172/15020132.

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7

Segoni, Ilaria Maria Lucia. Analysis of the Semileptonic Decay D0 → $\bar{K}$0 π-μ+v. Office of Scientific and Technical Information (OSTI), січень 2004. http://dx.doi.org/10.2172/15020199.

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8

Anderson, Andrew, and Mark Yacucci. Inventory and Statistical Characterization of Inorganic Soil Constituents in Illinois: Appendices. Illinois Center for Transportation, June 2021. http://dx.doi.org/10.36501/0197-9191/21-007.

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This report presents detailed histograms of data from the Regulated Substances Library (RSL) developed by the Illinois Department of Transportation (IDOT). RSL data are provided for state and IDOT region, IDOT district, and county spatial subsets to examine the spatial variability and its relationship to thresholds defining natural background concentrations. The RSL is comprised of surficial soil chemistry data obtained from rights-of-way (ROW) subsurface soil sampling conducted for routine preliminary site investigations. A selection of 22 inorganic soil analytes are examined in this report: Al, Sb, As, Ba, Be, Cd, Ca, Cr, Co, Cu, Fe, Pb, Mg, Mn, Hg, Ni, K, Se, Na, Tl, V, and Zn. RSL database summary statistics, mean, median, minimum, maximum, 5th percentile, and 95th percentile, are determined for Illinois counties and for recognized environmental concern, non-recognized environmental concern, and de minimis site contamination classifications.
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9

Pell, Eva J., Sarah M. Assmann, Amnon Schwartz, and Hava Steinberger. Ozone Altered Stomatal/Guard Cell Function: Whole Plant and Single Cell Analysis. United States Department of Agriculture, December 2000. http://dx.doi.org/10.32747/2000.7573082.bard.

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Original objectives (revisions from original proposal are highlighted) 1. Elucidate the direct effects O3 and H2O2 on guard cell function, utilizing assays of stomatal response in isolated epidermal peels and whole cell gas exchange. 2. Determine the mechanistic basis of O3 and H2O2 effects on the plasma membrane through application of the electrophysiological technique of patch clamping to isolated guard cells. 3. Determine the relative sensitivity of Israeli cultivars of economically important crops to O3 and determine whether differential leaf conductance responses to O3 can explain relative sensitivity to the air pollutant: transfer of technological expertise to Israel. Background to the topic For a long time O3 has been known to reduce gas exchange in plants; it has however been unclear if O3 can affect the stomatal complex directly. Ion channels are essential in stomatal regulation, but O3 has never before been shown to affect these directly. Major conclusions, solution, achievements 1. Ozone inhibits light-induced stomatal opening in epidermal peels isolated from Vicia faba, Arabidopsis thaliana and Nicotiana tabacum in V. faba plants this leads to reduced assimilation without a direct effect on the photosynthetic apparatus. Stomatal opening is more sensitive to O3 than stomatal closure. 2. Ozone causes inhibition of inward K+ channels (involved in stomatal opening) while no detectable effect is observed o the outward K+ channels (stomatal closure). 3. Hydrogen peroxide inhibits stomatal opening and induces stomatal closure in epidermal peels isolated from Vicia faba. 4. Hydrogen peroxide enhances stomatal closure by increasing K+ efflux from guard cells via outward rectifying K+ channels. 5. Based on epidermal peel experiments we have indirectly shown that Ca2+ may play a role in the guard cell response to O3. However, direct measurement of the guard cell [Ca2+]cyt did not show a response to O3. 6. Three Israeli cultivars of zucchini, Clarita, Yarden and Bareqet, were shown to be relatively sensitive to O3 (0.12 ml1-1 ). 7. Two environmentally important Israeli pine species are adversely affected by O3, even at 0.050 ml1-1 , a level frequently exceeded under local tropospheric conditions. P. brutia may be better equipped than P. halepensis to tolerate O3 stress. 8. Ozone directly affects pigment biosynthesis in pine seedlings, as well as the metabolism of O5 precursors, thus affecting the allocation of resources among various metabolic pathways. 9. Ozone induces activity of antioxidant enzymes, and of ascorbate content i the mesophyll and epidermis cells of Commelina communis L. Implications, both scientific and agricultural We have improved the understanding of how O3 and H2O2 do affect guard cell and stomatal function. We have shown that economical important Israeli species like zucchini and pine are relatively sensitive to O3.
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Anderson, Andrew, and Mark Yacucci. Inventory and Statistical Characterization of Inorganic Soil Constituents in Illinois. Illinois Center for Transportation, June 2021. http://dx.doi.org/10.36501/0197-9191/21-006.

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This report presents a statistical analysis of the Regulated Substances Library (RSL) developed by the Illinois Department of Transportation. The RSL is comprised of surficial soil chemistry data obtained from rights-of-way subsurface soil sampling conducted for routine preliminary site investigations. The 3.7-million-record RSL database is compared with four independent studies of inorganic soil constituents of naturally occurring soils in Illinois. A selection of 22 inorganic soil analytes are examined in this study: Al, Sb, As, Ba, Be, Cd, Ca, Cr, Co, Cu, Fe, Pb, Mg, Mn, Hg, Ni, K, Se, Na, Tl, V, and Zn. RSL database summary statistics, mean, median, minimum, maximum, 5th percentile, and 95th percentile, are determined for Illinois counties and for recognized environmental concern, non-recognized environmental concern, and de minimis site contamination classifications. The RSL database at a 95% confidence level is compared with current and proposed thresholds for defining naturally occurring soil concentrations for the selected analytes. The revised thresholds proposed by Cahill in 2017 are predominantly larger than the current standards found in the Tiered Approach to Corrective Action Objectives rules and are in better agreement with observed distributions of soil concentrations for both naturally occurring and RSL soils. A notable exception is antimony (Sb), for which Cahill proposed a reduced threshold similar in magnitude to the median for many Illinois Department of Transportation districts.
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