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  • 1
    Electronic Resource
    Electronic Resource
    Sorting-Based Selection Algorithms for Hypercubic Networks (2000)
    Springer
    Algorithmica 26 (2000), S. 237-254 
    Details
    ISSN: 1432-0541
    Keywords: Key words. Selection, Hypercube, Parallel algorithms.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract. This paper presents several deterministic algorithms for selecting the k th largest record from a set of n records on any n -node hypercubic network. All of the algorithms are based on the selection algorithm of Cole and Yap, as well as on various sorting algorithms for hypercubic networks. Our fastest algorithm runs in O( lg n lg * n) time, very nearly matching the trivial $\Omega(\lg n)$ lower bound. Previously, the best upper bound known for selection was O( lg n lg lg n) . A key subroutine in our O( lg n lg * n) time selection algorithm is a sparse version of the Sharesort algorithm that sorts n records using p processors, $p\geq n$ , in O( lg n ( lg lg p - lg lg (p/n) ) 2 ) time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004539910011
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  • 2
    Electronic Resource
    Electronic Resource
    d-Dimensional Range Search on Multicomputers (1999)
    Springer
    Algorithmica 24 (1999), S. 195-208 
    Details
    ISSN: 1432-0541
    Keywords: Key words. BSP, CGM, Parallel algorithms, Range search, Multicomputers, Parallel computing, Data-bases.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract. The range tree is a fundamental data structure for multidimensional point sets, and, as such, is central in a wide range of geometric and database applications. In this paper we describe the first nontrivial adaptation of range trees to the parallel distributed memory setting (BSP-like models). Given a set of n points in d -dimensional Cartesian space, we show how to construct on a coarse-grained multicomputer a distributed range tree T in time O( s / p + T c (s,p)) , where s = n log d-1 n is the size of the sequential data structure and T c (s,p) is the time to perform an h -relation with h=Θ (s/p) . We then show how T can be used to answer a given set Q of m=O(n) range queries in time O((s log m)/p + T c (s,p)) and O((s log m)/p + T c (s,p) + k/p) , where k is the number of results to be reported. These parallel construction and search algorithms are both highly efficient, in that their running times are the sequential time divided by the number of processors, plus a constant number of parallel communication rounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00008260
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  • 3
    Electronic Resource
    Electronic Resource
    Autopsy: quality assurance in the ICU (1999)
    Springer
    Intensive care medicine 25 (1999), S. 360-363 
    Details
    ISSN: 1432-1238
    Keywords: Key words Critical care unit ; Autopsy diagnosis ; Quality assurance ; Class I error ; Class II error
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: To examine the correlation between the clinical diagnosis and autopsy findings in adult patients who died in an intensive care unit (ICU). To determine the rate of agreement of the basic and terminal causes of death and the types of errors in order to improve quality control of future care. Design: Retrospective study. Setting: Adult ICU in a university hospital. Patients: 30 adult patients who died in the ICU, with the exclusion of medicolegal cases. Methods and main results: Anatomo-clinical meetings were held to analyze the pre- and postmortem correlations in 30 consecutive autopsies at the ICU of the University Hospital, School of Medicine of Botucatu/ UNESP, from January 1994 to January 1997. The rate of correct clinical diagnoses of the basic cause was 66.7 %; in 23.3 % of cases, if the correct diagnosis was made, management would have been different, as would have been the evolution of the patient's course (Class I error); in 10 % of the cases the error would not have led to a change in management (Class II error). The rate of correct clinical diagnoses of terminal cause was 80 %. Conclusions: The rate of recognition of the basic cause was 66.7 %, which is consistent with the literature, but the Class I error rate was higher than that reported in the literature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001340050858
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  • 4
    Electronic Resource
    Electronic Resource
    H-2-Controlled polymorphism of the γ chain of Slp (sex-limited protein) (1980)
    Springer
    Immunogenetics 11 (1980), S. 491-497 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A genetic polymorphism detected by the O'Farrell two-dimensional technique (isoelectric focusing and SDS-PAGE) of the murine sex-limited protein (Slp) is described and shown to map to theH-2 complex. The Slp charge variation was found to be in theγ chains. Inbred strains carrying theH-2 w7 andH-2 wr7 haplotypes, which are derived from a wild mouse, had Slp-γ chains with pI = 6.55 (Slp-lb). All other inbred strains, bearingH-2ij,H-2 s ,H-2 p ,H-2 d ,H-2 u , as well as three additional Slp-constituive wild females captured in Chile, had Slp-γ chain with pI = 6.71 (Slp-la).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01567817
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  • 5
    Electronic Resource
    Electronic Resource
    Metabolic responses to different glucose and glutamine levels in baby hamster kidney cell culture (1999)
    Springer
    Applied microbiology and biotechnology 51 (1999), S. 579-585 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract In this work, a BHK21 clone producing a recombinant antibody/cytokine fusion protein was used to study the dependence of cell metabolism on the glucose and glutamine levels in the culture medium. Results obtained indicate that both glucose and glutamine consumptions show a Michaelis-Menten dependence on glucose and glutamine concentrations respectively. A similar dependence is also observed for lactate and ammonia productions. The estimated value of the Michaelis constant for the dependence of lactate production on glucose (K Glc Lac) was 1.4 ± 0.1 mM and for the dependence of ammonia production on glutamine (K Gln Amm) was 0.25 ± 0.11 mM and 0.10 ± 0.03 mM, at glucose concentrations of 0.28 mM and 5.6 mM respectively. At very low glucose concentrations, the glucose to lactate yield decreased markedly, showing a metabolic shift towards lower lactate production. This␣metabolic shift was also confirmed by the significant increase in the specific oxygen consumption rate also observed at low glucose concentrations. Although it was␣highly dependent on glucose concentration, the oxygen consumption also increased with the increase in␣glutamine concentration. At very low glutamine concentrations, the glutamine to ammonia yield increased, showing a more efficient glutamine metabolism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002530051435
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  • 6
    Electronic Resource
    Electronic Resource
    Neurosurgery and biology of meningiomas Proceedings of a Symposium Organized by the Research Committee of the European Association of Neurosurgical Societies (EANS) in Schloss Fuschl, Salzburg, February 4–6, 1994 (1996)
    Springer
    Acta neurochirurgica 138 (1996), S. 99-116 
    Details
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01411732
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  • 7
    Electronic Resource
    Electronic Resource
    Stereotactic anatomy of the posterior cranial fossa a study of the transcerebellar approach to the brainstem (1991)
    Springer
    Acta neurochirurgica 113 (1991), S. 149-165 
    Details
    ISSN: 0942-0940
    Keywords: Stereotactic anatomy ; stereotactic surgery ; posterior fossa ; brainstem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The stereotactic transcerebellar (suboccipital) approach to the brainstem is one of the most accessible routes to reach targets located in the pons or in the medulla oblongata. Its use requires a perfect knowledge of the stereotactic anatomy of the posterior cranial fossa, and a standard reference system related to structures of the brainstem itself which can easily be visualized by Nuclear Magnetic Resonance. The present work consitsts in a three-dimensional variability study of the human posterior cranial fossa with its main contents, based on the investigation of 30 normal specimens (hemifossae). A new stereotactic reference system is proposed for the pons and the medulla, comprising three orthogonal planes: the midsagittal plane, the IVth ventricular floor plane and the pontomedullary junction plane. A standard “safety access tunel” was defined for the transcerebellar approach to the pons and, with some limitations, to the medulla. A complementary investigation, based upon angiographic studies, was carried out to define a safe “entry zone” to the posterior cranial fossa of the occipital bone beneath the transverse venous sinus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01403201
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  • 8
    Electronic Resource
    Electronic Resource
    Phase diagram of C60 from ab initio intermolecular potential (2000)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 113 (2000), S. 738-743 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Recently a new intermolecular potential for C60 was derived from ab initio calculations. Using this new interaction potential we numerically study the phase diagram of fullerite. Several numerical techniques are used in order to ascertain the correctness of the results. We predict that C60 can be found in the liquid state for densities between 0.468 and 0.845 nm−3 and temperatures between 1881 and 2012 K. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.481867
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  • 9
    Electronic Resource
    Electronic Resource
    Solid–fluid coexistence of the Lennard-Jones system from absolute free energy calculations (2002)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 116 (2002), S. 7145-7150 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The thermodynamic properties of coexisting solid and fluid phases are computed for the Lennard-Jones system. We make absolute Helmholtz free energy calculations for fluid and solid reference thermodynamic states and we compute differences in free energy relatively to these states in order to obtain thermodynamic properties in a range of temperatures and densities. For the free energy difference calculations we use a previously developed method [A. L. Ferreira and M. A. Barroso, Phys. Rev. E 61, 1195 (2000)]. Our results are compared with others available in the literature. Furthermore, we present absolute values of the Helmholtz free energy along solid–fluid coexistence lines. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1464828
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  • 10
    Electronic Resource
    Electronic Resource
    Octadecyl silica: A solid phase for protein purification by immunoadsorption
    Amsterdam : Elsevier
    Analytical Biochemistry 197 (1991), S. 47-51 
    Details
    ISSN: 0003-2697
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0003-2697(91)90353-U
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