Comptes rendus de l'Académie bulgare des Sciences

C O N T E N T S

Volume 66, Issue No5, 2013

MATHEMATICS

01   Ivan Trendafilov, Dimitrinka Vladeva   Idempotent Elements of the Endomorphism Semiring of a Finite Chain

621

02   Vladimir Petrov Kostov   About a Partial Theta Function

629

03   Bogdan Georgiev, Nadezhda Ribarska   On a Sweeping Process with the Cone of Limiting Normals

635

04   Angela Slavova, Nikolay Kyurkchiev   On an Implementation of Black‑Scholes Model for Estimation of Call- and Putoption via Programming Environment MATHEMATICA

643

05   Penka Georgieva, Ivan Popchev   Fuzzy Logic Q-measure Model for Managing Financial Investments

651

PHYSICS

06   Assen Tchorbadjieff, Christo Angelov, Ivo Angelov, Todor Arsov, Ivo Kalapov, Nina Nikolova, Aneta Boyadjieva   Detection of Coronal Mass Ejections (CMEs) in the Period of March‑May 2012 at Moussala Peak

659

07   Elka I. Karakoleva, Blagovesta S. Zafirova, Andrey T. Andreev   Localized Function Method Applying a Set of Sine Functions to Model Photonic Crystal Fibres

667

CHEMISTRY

08   Katya Milenova, Boris Kunev, Vladimir Blaskov, Sasho Vassilev, Irina Stambolova   Manganese-doped Zinc Oxide Nanopowders for Photocatalytic Decoloration of Reactive Black 5 Textile Dye

679

09   Boyan Todorov, Alexey Vasilev, Zornitsa Tosheva, Todor Deligeorgiev, Rumyana Djingova   On the Determination of Am3+ in Natural Water Based on Extraction of 241Am Complexes with Fluorinated TRIS-β-Diketone

685

BIOLOGY

10   Maria Lacheva   Two Sabulicolous Species of the Genus Agaricus (Agaricomycetes) New to Bulgaria and the Balkan Peninsula

691

11   Georgi B. Angelov   Variation of Esterase, Acid Phosphatase, Glutamateoxaloacetate Transaminase, Malate Dehydrogenase and Glutamate Dehydrogenase in Bulgarian Populations of Melica unfliora and M. ciliata (Poaceae)

697

12   Dimitar S. Dimitrov, Assen I. Assenov, Mariyana I. Lyubenova, Kalina L. Pachedjieva   New Chorological Data for the Vascular Flora of Mesta River Valley Floristic Region (Southwestern Bulgaria)

701

GEOLOGY

13   Ianko Gerdjikov, Eleonora Balkanska   Kalofer Granitoid Suite. A Late Variscan Stitching Pluton

709

14   Violeta Stojanova, Boris Valchev, Sava Juranov   Palaeogene Planktonic Foraminifera of the Republic of Macedonia

717

GEOPHYSICS

15   Gergana Georgieva, Svetlana Nikolova   The Moho Depth and Crustal Structure beneath Bulgaria Obtained from Receiver Function Analysis

725

ENGINEERING SCIENCES

16   Svetoslav Savov, Ivan Popchev   Noniterative Improvement of Trace Bounds for the Lyapunov Equation Solution

733

17   George Mengov   Stochastic Calibration of a Neurocomputational Model for Economic Decision-making

739

MEDICINE

18   Danail Pavlov, Milka Nashar, Miroslav Eftimov, Kalin Kalchev, Stefka Valcheva-Kuzmanova, Maria Tzaneva, Diana Ivanova   Subchronic Toxicity Study of Aqueous Infusion from Cotinus coggygria Leaves in Wistar Rats

749

19   Iliana Ilieva, Stefka Ivanova, Simeon Rangelov, Petia Tzvetkova, Valentina Ormandzhieva, Emilia Petrova   Sperm Changes in Cases with Varicocele

757

20   Iovtcho Topalov, Marinela Topalova, Georgi Marinov   "The Pending Oedema Symptom of the Thigh" at Thrombosis of the Deep Femoral Vein

765