Zinc Uptake in Loblolly Pine Seedlings

Zinc concentrations in the root, terminal growth, stem, and needles of loblolly pine (Pinus taeda L.) were measured in 72 seedlings grown in washed sand, fertilized with Zn(N03)2. Zinc treatment periods were early spring, late spring, and summer. Zinc uptake was the greatest in early spring. Zinc nitrate fertilizer and remaining soil zinc at treatments end had no effect on mycorrhizae, height, or diameter growth. Linear and multiple regressions were derived using residual soil zinc and treatment zinc that can predict zinc concentrations in different plant parts that have r values from .7440 to .8170. Linear regressions for the prediction of zinc concentrations in different plant parts from leaf zinc concentration have r values from .7694 to .9146

Stability of the splay state in pulse--coupled networks

The stability of the dynamical states characterized by a uniform firing rate ({\it splay states}) is analyzed in a network of globally coupled leaky integrate-and-fire neurons. This is done by reducing the set of differential equations to a map that is investigated in the limit of large network size. We show that the stability of the splay state depends crucially on the ratio between the pulse--width and the inter-spike interval. More precisely, the spectrum of Floquet exponents turns out to consist of three components: (i) one that coincides with the predictions of the mean-field analysis [Abbott-van Vreesvijk, 1993]; (ii) a component measuring the instability of "finite-frequency" modes; (iii) a number of "isolated" eigenvalues that are connected to the characteristics of the single pulse and may give rise to strong instabilities (the Floquet exponent being proportional to the network size). Finally, as a side result, we find that the splay state can be stable even for inhibitory coupling.Comment: 13 pages, 10 figures, submitted for pubblication to Physical Review

Solving large-scale dynamic systems using band Lanczos method in Rockwell NASTRAN on CRAY X-MP

The improved cost effectiveness using better models, more accurate and faster algorithms and large scale computing offers more representative dynamic analyses. The band Lanczos eigen-solution method was implemented in Rockwell's version of 1984 COSMIC-released NASTRAN finite element structural analysis computer program to effectively solve for structural vibration modes including those of large complex systems exceeding 10,000 degrees of freedom. The Lanczos vectors were re-orthogonalized locally using the Lanczos Method and globally using the modified Gram-Schmidt method for sweeping rigid-body modes and previously generated modes and Lanczos vectors. The truncated band matrix was solved for vibration frequencies and mode shapes using Givens rotations. Numerical examples are included to demonstrate the cost effectiveness and accuracy of the method as implemented in ROCKWELL NASTRAN. The CRAY version is based on RPK's COSMIC/NASTRAN. The band Lanczos method was more reliable and accurate and converged faster than the single vector Lanczos Method. The band Lanczos method was comparable to the subspace iteration method which was a block version of the inverse power method. However, the subspace matrix tended to be fully populated in the case of subspace iteration and not as sparse as a band matrix

Transnational Cooperation along Core Network Corridors: The Role of Corridor Fora

Corridor Fora is a young, yet important tool to promote transnational cooperation along TEN-T corridors, worthwhile scrutinizing. They bring together various stakeholders and perspectives. Public authorities and infrastructure providers and operators are the main stakeholder groups in the Corridor Fora. Experience shows that the members use the forum meetings for policy coordination and lobbying, networking and learning, but also as a source of inspiration. However, it is also important to note that some interests are underrepresented in the Fora and synergies between the corridors are not yet fully exploited. Corridor Fora are embedded in a wider system of European transport and cooperation policies. To promote transnational cooperation along the Orient/East-Med Corridor and develop understanding and trust, additional tools such as INTERREG A, INTERREG B, macro-regional strategies and bottom-up initiatives are important complementary activities. In this way, corridor development can be addressed from different perspectives to further build on cooperation traditions.Korridor-Foren sind ein junges, aber bedeutsames Instrument zur Förderung der transnationalen Zusammenarbeit entlang von TEN-V-Korridoren, das sich für eine vertiefte Betrachtung anbietet. Die Foren bringen verschiedene Akteure und Perspektiven zusammen. Öffentliche Behörden sowie Anbieter und Betreiber von Infrastrukturen sind die zentralen Akteursgruppen in den Korridor-Foren. Die Erfahrung zeigt, dass die Mitglieder die Forumssitzungen zur Koordination und Lobbyarbeit, zur Netzwerkpflege und für Lernprozesse, aber auch als Inspirationsquelle nutzen. Es muss jedoch auch darauf hingewiesen werden, dass einige Interessen in den Foren unterrepräsentiert sind und Synergien zwischen den Korridoren noch nicht vollständig genutzt werden. Korridor-Foren sind in ein umfassendes System der europäischen Verkehrspolitik und Zusammenarbeit integriert. Um die transnationale Zusammenarbeit entlang des Orient/East-Med Corridors zu fördern und gegenseitiges Verständnis und Vertrauen zu entwickeln, stellen Instrumente wie INTERREG A, INTERREG B, makroregionale Strategien und Bottom-up-Initiativen wichtige ergänzende Maßnahmen dar. Auf diese Weise kann die Korridorentwicklung aus verschiedenen Perspektiven betrachtet werden, um so auf bereits bestehenden Kooperationsbeziehungen aufzubauen

Continuous approach for the random-field Ising chain.

We study the random-field Ising chain in the limit of strong exchange coupling. In order to calculate the free energy we apply a continuous Langevin-type approach. This continuous model can be solved exactly, whereupon we are able to locate the crossover between an exponential and a power-law decay of the free energy with increasing coupling strength. In terms of magnetization, this crossover restricts the validity of the linear scaling. The known analytical results for the free energy are recovered in the corresponding limits. The outcomes of numerical computations for the free energy are presented, which confirm the results of the continuous approach. We also discuss the validity of the replica method which we then utilize to investigate the sample-to-sample fluctuations of the finite size free energy

COPD Assessment Test: teste rapido e de facil uso que promove o automanejo

Federal University of São Paulo Paulista School of MedicinePulmonary Rehabilitation Center Pulmonary Rehabilitation CenterPaulista School of Medicine Paulista School of MedicineFederal University of São PauloUNIFESP, EPMSciEL