We revisit the deadlock-prevention problem by focusing on priority digraphs instead of the traditional wait-for digraphs. This has allowed us to formulate deadlock prevention in terms of prohibiting the occurrence of directed cycles even in the most general of wait models (the so-called AND-OR model, in which prohibiting wait-for directed cycles is generally overly restrictive). For a particula...

El presente trabajo trata de dar luz sobre la publicación digital en abierto que propone el Proyecto OpenCourseWare y más particularmente sobre las implicaciones que conlleva la incorporación de las instituciones universitarias a dicho proyecto. Se realiza una reflexión sobre las ventajas del movimiento OpenCourseWare y se apuntan también las deficiencias de las que adolece.

Resumen. Se analizan las implicaciones que la posible sustitución de las tradicionales publicaciones científicas impresas por sus equivalentes electrónicas puede tener en el proceso de comunicación científica. En primer lugar se examinan las dos grandes ventajas que han favorecido el crecimiento de las publicaciones electrónicas y que afectan a las comunidades bibliotecaria y científica: las re...

Remarks: Neat Na-LAS was 16.1 % (w/w) active C11.6 LAS in an aqueous solution, average molecular weight = 342 g/mol; Ca-LAS was > 99 % active C11.6 LAS (crystalline), average molecular weight = 674 g/mol (Ca is bivalent and therefore, each Ca atom has 2 LAS molecules); Mg-LAS 94 % active C11.6 LAS (crystalline), average molecular weight = 658 g/mol (Mg is bivalent and therefore, each Mg atom ha...

S. Gallego [email protected] Universidad de Alicante, Instituto Universitario de Fı́sica Aplicada a las Ciencias y las Tecnologı́as, Sant Vicent del Raspeig, 03690, Spain Departamento de Fı́sica, Ingenierı́a de Sistemas y Teorı́a de la Señal. Universidad de Alicante. Apartado 99. E03080 Alicante, Spain A. Márquez Universidad de Alicante, Instituto Universitario de Fı́sica Aplicada a las Ciencias y ...

Citrus Huanglongbing (HLB) is the most destructive citrus disease worldwide. HLB is associated with three species of the phloem-limited, gram-negative, fastidious α-proteobacteria: Candidatus Liberibacter asiaticus (Las), Ca. L. americanus (Lam), and Ca. L. africanus (Laf) with Las being the most widespread species. Las has not been cultured in artificial media, which has greatly hampered our e...

The accuracy in determining sensible heat flux (H) of three Kipp and Zonen large aperture scintillometers (LAS) was evaluated with reference to an eddy covariance (EC) system over relatively flat and uniform grassland near Timpas (CO, USA). Other tests have revealed inherent variability between Kipp and Zonen LAS units and bias to overestimate H. Average H fluxes were compared between LAS units...

OBJECTIVES This study was undertaken to evaluate whether the adoption of the united network for organ sharing lung allocation score (LAS) was associated with significant changes in lung transplantation (LTX) outcomes for patients with interstitial lung disease (ILD) who underwent LTX at the University of Wisconsin Hospital and Clinics. METHODS Outcomes for 107 consecutive patients with variou...

Residents of Las Vegas, Nevada have much higher suicide rates than residents of other metropolitan counties in the USA. Whether the risk of suicide among visitors to Las Vegas is also significantly elevated has been difficult to assess because person-time denominator information is not available. We used a case-control design to examine the association between exposure to Las Vegas and risk of ...