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16182. Topology design for group consensus in directed multi-agent systems
- Creator:
- Cihan, Onur
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- group consensus, topology design, and multi-agent agreement
- Language:
- English
- Description:
- In this paper, we investigate the grouping behavior of multi-agent systems by exploiting the graph structure. We propose a novel algorithm for designing a network from scratch which yields the desired grouping in a network of agents utilizing a consensus-based algorithm. The proposed algorithm is shown to be optimal in the sense that it consists of the minimum number of links. Furthermore, we examine the effect of adding new vertices and edges to the network on the number of groups formed in the group consensus problem. These results can be further utilized by the network topology designer to restructure the network and achieve the desired grouping. Theoretical results are illustrated with simulation examples.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
16183. Torakoskopicky navozená chemická pleurodéza v léčbě maligního pleurálního výpotku
- Creator:
- Habal, Petr, Omran, Nedal, Jankovičová, Karolína, Kondělková, Kateřina, Krejsek, Jan, and Manďák, Jiří
- Format:
- braille, text, and regular print
- Type:
- model:article, article, Text, práce podpořená grantem, hodnotící studie, přehledy, and TEXT
- Subject:
- maligní pleurální výpotek--etiologie--farmakoterapie--chirurgie, pleurodéza--metody--statistika a číselné údaje, torakoskopie, výsledek terapie, mastek--terapeutické užití, dospělí, staří, ženské pohlaví, lidé, mužské pohlaví, lidé středního věku, sCD-163, and talkáž
- Language:
- Czech and English
- Description:
- Kontinuální tvorba výpotků jakékoliv etiologie zásadním způsobem ovlivňuje kvalitu života nemocných. Akumulace tekutiny v pleurální dutině postupně komprimuje plicní parenchym. Prvním příznakem bývá progrese námahové dušnosti, později se přidává i klidová dušnost. S nárůstem výpotku dochází ke kompresi plicního parenchymu s rozvojem plicní atelektázy. Nemocný je ohrožen vznikem zánětového onemocnění plic v nevzdušném plicním parenchymu. U diagnózy maligního onemocnění je riziko zánětových komplikací výrazně vyšší vzhledem k předchozí chemoterapii či radioterapii, která zásadním způsobem snižuje imunitu. Opakovaná tvorba výpotku se výrazně podílí na rozvoji terminálního stavu nádorové kachexie. Efektivní metodou léčby je chemická pleurodéza, která se užívá u vybraného spektra nemocných. Principem je navození aseptické pleuritidy. Nejefektivnější cestou aplikace léčiva je videotorakoskopie. V souboru bylo 47 nemocných, 29 (61,7 %) mužů a 18 (38,3 %) žen, s cytologicky prokázaným recidivujícím maligním pleurálním výpotkem. Věkové rozmezí 42–80 let, Ø věk 65 let. Cílem práce bylo objektivizovat průběh celkových a lokálních zánětových změn po talkáži. Efekt léčby nebyl ovlivněn základním typem nádorového onemocnění. U obou skupin nebyly významně odlišné pooperační komplikace, což dokládá bezpečnost zvolené metody a podporuje správně zvolený algoritmus léčby., Continuous pleural effusion production of any aetiology can significantly affect the quality of patients life. Chronic effusion accumulation in the pleural cavity can lead to lung parenchyma compression. The first symptom of this entity is a progressive exertional dyspnea, which can later turn in dyspnea at rest. With the increase of the pleural effusion volume, pulmonary atelectasis can develop due to chronic parenchycha compression. The patient is at risk of inflamatory complications from the territory of non-ventilated parenchyma. Patients with a diagnosis of malignant disease have this risk considerably higher due to their previous chemotherapy or radiation, which substantially affect the immunity system. Repeated pleural effusion formation can significantly take part in the development of the terminal status of cancer cachexia. An effective method of palliative treatment is a chemical pleurodesis, which is used in selected patients. The principle is inducing aseptic inflammation. The most effective way of application is via videothoracoscopy. In a group of 47 patients, there were 29 (61.7 %) men and 18 (38.3 %) women with cytologically diagnosed recurrent malignant pleural. The age ranged between 42 and 80 with average age of 65 years. The aim was to assess the course of local and systemic inflammatory changes after talc application. The effect of treatment was not influenced by the type of malignancy . In both groups there was no significant difference in postoperative complications. This proves the safety of the selected procedure and also supports the correctness of the chosen algorithm of treatment., Petr Habal, Nedal Omran, Karolina Jankovičová, Kateřina Kondělková, Jan Krejsek, Jiří Manďák, and Literatura
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
16184. Torsion classes of Specker lattice ordered groups
- Creator:
- Jakubík, Ján
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Specker lattice ordered group, generalized Boolean algebra, and torsion class
- Language:
- English
- Description:
- In this paper we investigate the relations between torsion classes of Specker lattice ordered groups and torsion classes of generalized Boolean algebras.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
16185. Torsion units for some almost simple groups
- Creator:
- Gildea, Joe
- Format:
- print, bez média, and svazek
- Type:
- model:article and TEXT
- Subject:
- matematika, integrály, mathematics, integrals, Zassenhaus conjecture, torsion unit, partial augmentation, integral group ring, 13, and 51
- Language:
- English
- Description:
- We investigate the Zassenhaus conjecture regarding rational conjugacy of torsion units in integral group rings for certain automorphism groups of simple groups. Recently, many new restrictions on partial augmentations for torsion units of integral group rings have improved the effectiveness of the Luther-Passi method for verifying the Zassenhaus conjecture for certain groups. We prove that the Zassenhaus conjecture is true for the automorphism group of the simple group PSL(2, 11). Additionally we prove that the Prime graph question is true for the automorphism group of the simple group PSL(2, 13)., Joe Gildea., and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
16186. Torsions of connections on higher order cotangent bundles
- Creator:
- Doupovec, Miroslav and Kurek, Jan
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- affinor, general connection, and torsion
- Language:
- English
- Description:
- By a torsion of a general connection $\Gamma $ on a fibered manifold $Y\rightarrow M$ we understand the Frölicher-Nijenhuis bracket of $\Gamma $ and some canonical tangent valued one-form (affinor) on $Y$. Using all natural affinors on higher order cotangent bundles, we determine all torsions of general connections on such bundles. We present the geometrical interpretation and study some properties of the torsions.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
16187. Total accessibility number of graphs
- Creator:
- Kilic, E. and Dündar, P.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- graph theory, accessibility number, total reduncance, and total accessibility
- Language:
- English
- Description:
- One of the most important problems in communication network design is the stability of network after any disruption of stations or links. Since a network can be modeled by a graph, this concept is examined under the view of vulnerability of graphs. There are many vulnerability measures that were defined in this sense. In recent years, measures have been defined over some vertices or edges having specific properties. These measures can be considered to be a second type of measures. Here we define a new measure of the second type called the total accessibility. This measure is based on accessible sets of a graph. In our study we give the total accessibility number of well known graph models such as Pn, Cn, Km,n, W1,n, K1,n. We also examine this new measure under operations on graphs. A simple algorithm, which calculates the total accessibility number of graphs, is given. We observe that when any two graphs of the same size are compared in stability, it is inferred that the graph of higher total accessibility number is more stable than the other one. All the graphs considered in this paper are undirected, loopless and connected.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
16188. Total HIP arthroplasty in patients with Parkinson's disease
- Creator:
- Pradeep, George Mathew, Šponer, Pavel, Kučera, Tomáš, Grinac, Michal, and Knížek, Jiří
- Format:
- print, text, and regular print
- Type:
- model:article, article, Text, časopisecké články, práce podpořená grantem, and TEXT
- Subject:
- staří, staří nad 80 let, náhrada kyčelního kloubu, kohortové studie, ženské pohlaví, nekróza hlavice femuru--komplikace--chirurgie, fraktury kyčle--komplikace--chirurgie, lidé, mužské pohlaví, Parkinsonova nemoc--komplikace--chirurgie, periprotetické fraktury--komplikace--chirurgie, selhání protézy, reoperace, and výsledek terapie
- Language:
- English
- Description:
- The aim of this study is to evaluate the results of total hip arthroplasty in patients with Parkinson's disease during a period of five years, focusing on the assessment of the risks and benefits of surgery. During this period we performed total hip arthroplasty in 14 patients (15 hips) with Parkinson's disease. Patients were evaluated by subjective symptoms and objective findings, with a focus on the use of support while walking and walking distance, severity of Parkinson's disease before surgery and at the time of the last follow-up. During the postoperative period, the following parameters were assessed: length of ICU stay, mobilization, complications, the total duration of hospitalization and follow-up care after discharge. Of the 11 patients (12 hips) followed-up 1-5 years with an average of 3 years after operation 8 cases showed progression of neurological disability. 5 patients (6 hips) showed an increased dependence on the use of support when walking and reduced distance that the patient was able to walk. Subjectively, 10 hip joints were completely painless and 2 patients complained of only occasional mild pain in the operated hip. Complications that were encountered were urinary tract infection (5 patients), cognitive impairment (3 patients) and pressure ulcer (2 patients). We did not observe any infection or dislocation of the prosthesis. Three patients fell and fractured the femur and 3 patients in our cohort died during follow up. Implantation of total replacement is possible with judicious indication after careful evaluation of neurological finding in patients with minimal or mild functional impairment of the locomotor system. Prerequisite for a good result is precise surgical technique and optimal implant position with balanced tension of the muscles and other soft tissues around the hip. and PG. Mathew, P. Sponer, T. Kucera, M. Grinac, J. Knízek
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
16189. Totally real submanifolds in a quaternion space form
- Creator:
- Bektas, Mehmet
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- totally real submanifold and quaternion space form
- Language:
- English
- Description:
- In this paper, we prove a theorem for $n$-dimensional totally real minimal submanifold immersed in quaternion space form.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
16190. Totally reflexive modules with respect to a semidualizing bimodule
- Creator:
- Zhang, Zhen, Zhu, Xiaosheng, and Yan, Xiaoguang
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- semidualizing bimodule, totally reflexive module, Bass class, precover, and preenvelope
- Language:
- English
- Description:
- Let $S$ and $R$ be two associative rings, let $ _{S}C_{R}$ be a semidualizing $(S,R)$-bimodule. We introduce and investigate properties of the totally reflexive module with respect to $_{S}C_{R}$ and we give a characterization of the class of the totally $C_{R}$-reflexive modules over any ring $R$. Moreover, we show that the totally $C_{R}$-reflexive module with finite projective dimension is exactly the finitely generated projective right $R$-module. We then study the relations between the class of totally reflexive modules and the Bass class with respect to a semidualizing bimodule. The paper contains several results which are new in the commutative Noetherian setting.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public