We characterize two types of bar-visibility graphs on the Mobius band (abbreviated "BVGMs"), in which vertices correspond to intervals that are parallel or orthogonal to the axis of the band, depen­ ding on type, and in which adjacency corresponds to orthogonal visibility of intervals. BVGMs with intervals orthogonal to the axis are shown to be equivalent to the "polar visibility graphs" studie...

Luísa Costa Andrade Medical Imaging Department and Faculty of Medicine, University Hospital of Coimbra. Praceta Mota Pinto, 3000-075 Coimbra, Portugal Email: [email protected] Radiology Resident Medical Imaging Department and Faculty of Medicine, University Hospital of Coimbra. Radiologist Medical Imaging Department and Faculty of Medicine, University Hospital of Coimbra. Cardiologist C...

Contrast-Enhanced MR Angiography of Thoracic Vascular Malformations in a Pediatric Population Filipe Caseiro-Alves1,2, Paulo Gil-Agostinho1, Graça Ramalheiro3 and Pedro Gil-Agostinho1 1 Imacentro, Clinica de Imagiologia Médica, Rua S.Teotónio, Lote 8, 5° Esq., 3000-377 Coimbra, Portugal. 2 Faculdade de Medicina de Coimbra, Cadeira de Imagiologia, 3000-075 Coimbra, Portugal. 3 Paediatric Cardiol...

We present spectroscopy and orbital periods Porb of four relatively little-studied cataclysmic variable stars. The stars and their periods are: AF Cam, Porb = 0.324(1) d (the daily cycle count is slightly ambiguous); V2069 Cyg (= RX J2123.7+4217), 0.311683(2) d; PG 0935+075, 0.1868(3) d; and KUV 03580+0614, 0.1495(6) d. V2069 Cyg and KUV 03580+0614 both show HeII λ4686 emission comparable in st...

We present new results concerning the problem of nding a constrained pattern in a set of 2-intervals. Given a set of n 2-intervals D and a model R describing if two disjoint 2-intervals can be in precedence order (<), be allowed to nest (@) and/or be allowed to cross (G), the problem asks to nd a maximum cardinality subset D′ ⊆ D such that any two 2-intervals in D′ agree with R. We improve the ...

Let P be a finite point set in Rd, B bicoloring of and O family geometric objects (that is, intervals, boxes, balls, etc). An object from is called balanced with respect to if it contains the same number points each color B. For collection bicolorings P, system unbiased representatives (G-SUR) subset O′⊆O such that for any there an O′ We pose study problems on finding G-SURs. obtain general bou...

A multiple-interval representation of a graph G is a mapping f which assigns to each vertex of G a union of intervals on the real line so that two distinct vertices u and v are adjacent if and only if f(u) ∩ f(v) = ∅. We study the total interval number of G, de0ned as I(G) = min {∑ v∈V #f(v): f is a multiple-interval representation of G } ; where #f(v) is the minimum number of intervals whose u...

The butyrate derivative isobutyramide (IBT) increases fetal hemoglobin (HbF) in patients with beta-hemoglobinopathies, but little is known about its usefulness for prolonged therapeutic use. We treated 8 patients with transfusion-dependent beta-thalassemia with 350 mg/kg of body weight per day of oral IBT for 126 to 384 days. During the trial period, the hemoglobin level was maintained between ...

a total of 528 day-old ross 308 male broilers were used to study the effect of antibiotic, probiotic, prebiotic and organic acid on performance, cecal coliform load and internal organs’ weight. the chickens were placed into 6 groups with 4 replicates and 22 chickens per pen. six dietary treatments included: 1) negative control as basal diet without any antibiotic growth promoter and coccidiosta...