41 research outputs found
Methodologies for the estimation of uncertainties and the correction of fixed-point temperatures attributable to the influence of chemical impurities
No full textРоль трипторелина (Диферелин) в лечении рака предстательной железы
No full textEfficacy and safety issues of triptorelin (Diphereline) use in the treatment of patients with prostate cancer are addressed. Several clinical studies of efficacy of treatment with triptoreline both in mono-regimen and combined with other drugs are discussed.
ВОЗМОЖНОСТИ ДИГИТАЛЬНОЙ СУБТРАКЦИОННОЙ АОРТОАРТЕРИОГРАФИИ С ВНУТРИВЕННЫМ ВВЕДЕНИЕМ КОНТРАСТНОГО ВЕЩЕСТВА ПРИ ОТСУТСТВИИ ТРАНСАРТЕРИАЛЬНОГО СОСУДИСТОГО ДОСТУПА
No full textABSTRACT. The digital subtraction aortic arteriography with the transaxillar venous approach was successfully performed in a patient with multifocal atherosclerosis and inability to underwent any transarterial procedures. Fine-quality angiographic images of the thoracic and abdominal aorta and the arteries of lower extremities were obtained. The total volume of the injected non-ionic contrast medium Ultravist-370 was 210 ml. РЕЗЮМЕ. Дигитальная субтракционная аортоартериография у пациента с мультифокальным атеросклерозом была выполнена с применением венозного трансаксиллярного доступа из-за невозможности осуществления стандартного трансартериального доступа. Были получены качественные ангиограммы грудного и брюшного отделов аорты, а также артерий нижних конечностей. При этом суммарный объем неионного контрастного вещества «Ультравист-370», введенного для исследования, составил 210 мл.
THE SCOPE OF DIGITAL SUBTRACTION AORTIC ARTERIOGRAPHY WITH INTRAVENOUS CONTRAST MEDIUM INJECTION IN CASE OF ABSENCE OF THE TRANSARTERIAL VASCULAR APPROACH
No full textABSTRACT. The digital subtraction aortic arteriography with the transaxillar venous approach was successfully performed in a patient with multifocal atherosclerosis and inability to underwent any transarterial procedures. Fine-quality angiographic images of the thoracic and abdominal aorta and the arteries of lower extremities were obtained. The total volume of the injected non-ionic contrast medium Ultravist-370 was 210 ml
Роль сорафениба (Нексавар) в лечении неоперабельного местно-распространенного и диссеминированного почечно-клеточного рака
No full textEfficacy and safety issues of sorafenib (Nexavar) use in the treatment of patients with inoperable locally advanced and disseminated renal cell cancer are addressed. Several clinical studies of efficacy of treatment with sorafenib both in mono-regimen and combined with other drugs are discussed.
Radiosurgical Treatment of a Patient With a Ruptured Arteriovenous Malformation Located in a Functionally Significant Area
No full textArteriovenous malformations (AVMs) of the brain are quite rare vascular pathologies, but they are life-threatening, due to the risk of intracerebral hemorrhage. Stereotactic radiosurgical treatment of patients with cerebral AVM is performed in cases where surgical removal is impossible or embolization with a stable occlusive effect cannot be performed. Currently, for the diagnosis of AVM, magnetic resonance imaging (MRI) is increasingly used because of its noninvasiveness and minimal risks. When a malformation is located in a functionally significant area, then a non-invasive technique is used to assess its interposition and mapping - functional magnetic resonance imaging.We have presented the experience of radiosurgical treatment of a 43-year-old male patient with a ruptured AVM located in the left temporal lobe, near Wernicke’s area. The patient underwent stereotactic radiosurgical treatment with Elekta Leksell Gamma Knife Perfection device, taking into account the location of the AVM in a functionally significant area, preoperative mapping was performed. After two years, according to MR angiography, the arterial component in the projection of the irradiated AVM was not visualized, which was confirmed by the data of cerebral angiography. Thus, a clinical example has demonstrated the high efficiency of MRI in the diagnosis and assessment of the results of the performed stereotactic radiosurgical treatment of AVMs
Нефробластома у взрослых
No full textNephroblastoma (NB), a childhood embryonic tumor, accounts for less than 1% of all neoplasms in adults. The algorithm of an examination of patients aged above 14 years who has suspected NB should include angiography in addition to ultrasound computed tomography and computed tomography. Verification of its diagnosis in adults before therapy requires fine-needle tumor biopsy. Treatment for NB in adults should be multimodality and include neoadjuvant chemotherapy, primary tumor removal, and subsequent chemoradiation therapy. The prognosis is fair in patients over 14 years of age who had a localized NB and poor in those with locally extended and disseminated tumors. It is necessary to perform multicenter studies in order to develop an optimal therapeutic algorithm and to improve the results of treatment for NB in adults.
Estudo da formação do CN numa descarga eletrica em fluxo de N2-CH4
No full textDissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas.Compõe o conteúdo desse trabalho, estudos espectroscópicos de uma descarga elétrica em fluxo de misturas N2 - CH4, com o objetivo de se investigar os mecanismos de formação do radical ciano (CN). Efetuam-se medidas de temperatura do gás à partir da distribuição rotacional do segundo sistema positivo do nitrogênio e da temperatura da parede do tubo. Discutem-se os resultados obtidos e a validade desses dois métodos. O campo elétrico de manutenção da descarga é medido por intermédio de sondas eletrostáticas, em função da percentagem CH4 na descarga. O comportamento desse parâmetro é explicado com base nos processos de ionização associativa envolvendo moléculas em estados metaestáveis. É apresentado um modelo cinético para descargas em N2 puro, que fornece dados em bom acordo com os resultados experimentais. Esse modelo trata da solução da equação de Boltzmann homogênea para os elétrons, e de uma rotina numérica que descreve de maneira auto-consistente a cinética das partículas pesadas. São propostos, com base na literatura e nos resultados experimentais obtidos, mecanismos de formação do radical ciano (CN), para as regiões da coluna positiva e da pós-descarga
Involutions and heegaard floer homology
No full textThis Ph.D. dissertation studies the relationship of an involution acting on a 3-manifold (or a knot K) with the Heegaard Floer homology. There are three main aspects of this project: strong cork detection, studying homology bordism group of diffeomorphisms and explicitly computing the action of symmetry on the Knot Floer complex for symmetric knots. In the second chapter, we study pairs of an integer homology sphere equipped with an involution modulo equivariant homology cobordisms. We show that equivalence classes of the above relation form an abelian group under the group operation as disjoint union. We refer to this group as the homology bordism group of involutions. This group can be thought of as a generalized version of the bordism group of diffeomorphisms, which was first studied by Browder. We define two Floer-theoratic invariants of this group, using the framework of involutive Heegaard Floer homology, recently developed by Hendricks and Manolescu.Corks play an important role in the study of exotic smooth structures on 4-manifolds. As shown by Matveyev and Curtis-Freedman-Hsiang-Stong , any two smooth structures on a simply connected topological 4-manifold are related by the action of cork-twist. Lin-Ruberman-Saveliev studied a more generalised version of a cork, called the strong cork. These are corks for which the cork-twist involution does not extend over any homology 4-ball that the cork may bound. They also constructed the first example of such a strong cork by studying the induced action of a cork-twist on monopole Floer homology. In the third chapter, we show that the invariants developed earlier also detect strong corks. We then go on to establish several new families of corks and prove that various known examples corks are actually strong. Our main computational tool is a monotonicity theorem which constrains the behavior of our invariants under equivariant negative-definite cobordisms, and an explicit method to construct equivariant cobordisms. The contents of second and third Chapter are from a joint work of the author with Irving Dai and Matthew Hedden . In the 4-th chapter we study symmetric knots. We show that each symmetry of a knot induces a map on the knot Floer complex. We further show that these induced maps behave differently according to how the fixed set of the symmetry intersects knot. We then explicitly compute some of those maps.Thesis (Ph. D.)--Michigan State University. Mathematics, 2021Includes bibliographical references (pages 75-78
Contributions to the study of Fourier series of function of class Vp
No full textIn the present thesis we study the different problems concerning the Fourier series of function of Wiener's class Vp . In order to state precisely the results proved, it is necessary to give some definitions and notations. In chapter I, we define the classes Vp and establish its main properties. In section one of chapter II we first study the problem of summability of the sequences, and allied sequences in the classes (Vp1 < p < °°) by infinite matrices which are not necessarily regular. This enables us to obtain the generalizations of some theorems of J. A. Siddiqi [19] [20] which include as a special cases those obtained by Wiener [27], Lozinskii [14], Matveyev cf. [2] and Keogh and Petersen [13]. We also show that under our hypothesis not only above sequences are summable A (or FA) to zero but even the modulii of these sequences are summable A (or FA) to zero. In section 2 of chapter II we study the problem of summability of the sequence {cke ikx} by a normal almost periodic matrix in the class Vp . Thus we find the class of matrices which sums every sequence {Ck} of Fourier-Stieltjes coefficients in the classes Vp(1 < p < °°). It is natural to ask how Fourier coefficients of function of the classes V behave. In chapter III we determine P the order of Fourier coefficients of function of V . We have been P able to find out the best constant which turns out to be V (f) P in our case. We also study how many Fourier coefficients can have exactly the order n . With the help of these estimates we further study the problem of density of positive and negative Fourier sine and cosine coefficients of function of p-th variation. This enables us to obtain the generalization and sharpened version of theorems due to M. and S. Izumi [9]. We generalize their results by replacing (C,I) summability by any method of summability in the strictly larger class (Vp1 < p < °°). Among other things we also show that the hypothesis (10) in case III of theorem D (see page 49 chapter III of this thesis) is superflous and all the results are true uniformity in r = 0, I, 2, ... The chapter IV of this thesis is devoted to the study of certain questions concerning the convergence and absolute convergence of Fourier series of function of the class Vp . Wiener [27] has shown that a Fourier series of a function of Vp (1 < p < °°) converges almost everywhere. In particular he [27] has shown that a Fourier series of a function of the class converges to è [f(x+0) + f(x-O)] for every value of x. Generalizing the above results, we show that a Fourier series of a function of the class Vp (1 < p < °°) converges to 1/2[f(x+0) + f(x-O)] at every point X. Bernstein [3] was one of the first mathematicians who investigated the problem of absolute convergence of Fourier series relating it to the continuity properties of generating fonction in the whole interval of periodicity. This theorem was improved upon in varions ways by authors like Zygmund [33], Szàsz [26]. In section 2 of chapter IV we extend the results of Zygmund and Szàsz on absolute convergence of Fourier series for the fonction of the classes V . P Finally in chapter V, which is the last chapter of this thesis, we discuss the problem of integrability of functions of the class Vp (1 < p < °°). We generalize some integrability theorems of Boas [4] and of Zygmund [33] to functions of the classes Vp (1 < p < °°) We partially answer in affirmative a question posed by Boas [4]
