showing 36 of ~574560 from 574555 documents
Evidence for Shape Coexistence in Neutron-Rich Rh and Ag Nuclei
1988
Neutron-rich nuclei of Rh and Ag have been investigated by γ-ray spectroscopic measurements as well as single-particle transfer reactions like (d,3He) and (3He,d). The obtained level schemes of 105,107,109,111Rh and 113,115Ag show two different types of excitation: (I) proton-hole states related to a spherical shape of the nucleus and (II) proton-particle states with a rotational band-like structure (intruder band) pointing towards deformation of the nucleus. The “fingerprints” for such a shape coexistence and resulting systematics in these nuclei and the possible interpretation of the intruder band as a rotational band built upon the 1/2+[431] Nilsson configuration are discussed.
Un ancêtre des princes celtes
1988
National audience
Osteotomía de acortamiento del radio en la enfermedad de Kienböck
1988
The authors have studied 12 cases of Kienböck disease treated with radiusshortening osteotomy. The results are analyzed anda new potential Kienböck classification is presented: true Kienböck with variants A (presenting primary fracture) and B (without primary fracture), and evolved Kienböck.
Application of DNA Polymorphisms in Paternity Testing in Germany: Solution of an Incest Case Using Bacteriophage M13 Hybridization with Hypervariable…
1988
More than 25 blood, serum, and enzyme polymorphisms have been introduced into paternity testing in Germany in recent years (Rittner, 1975). If a “no” decision is defined by exclusion, and a “yes” decision requires a probability of 99.73 % or more, more than 90 % of court cases can be solved in this respect. A few cases not being clarified by a standard expertise include: 1) Cases with more than one alleged man if the men and/or the mother and the men are related. 2) Some cases where the putative father is deceased, and neither the parents nor the legitimate offspring are available for the study. 3) Cases where possible exclusion in a given polymorphic system interferes with an overall evide…
Crystal structure and reactivity of 2-chloro-3,5-dinitrothiophene and of 2-phenylsulphonyl-3,5-dinitrothiophene with nucleophiles
1988
The geometry obtained by a crystal structure determination of the title compounds, as compared with that of the analogous benzene derivatives, along with results of ab initio calculations, is used to interpret the different SNAr reactivities in some thiophene and benzene compounds. The smaller rotation of the nitro groups with respect to the aromatic rings observed in thiophene derivatives should be considered a relevant factor in the higher reactivity in the thiophene series.
Diagnostische Aussagekraft von Sonographie und Computertomographie bei Lebermetastasen
1988
The diagnostic accuracy of sonography and computed tomography for detecting liver metastases was analysed in 526 patients with tumors and the findings were compared with those at laparotomy and at post mortem. The surgical protocols were analysed in respect of the primary tumour, the frequency of metastases and the number, localisation and size of metastases. A comparison of sonography and CT showed a higher sensitivity for CT (57.1%) compared with sonography (52.3%) although specificity was slightly higher for sonography. Liver metastases greater than 15 mm were detected by sonography (80.5%) and CT (92%), with much higher sensitivity. CT also proved superior, since the results depended le…
Echographic patterns of an orbital myxoma and schwannoma
1988
A case of intramuscular orbital myxoma and of a schwannoma of the orbit were studied with B-scan and standardized A-scan echography as described by Ossoinig. The myxoma appeared as a well outlined process with medium internal reflectivity and areas of low internal reflectivity. Postoperatively the incompletely excised tumour was followed with echography as well as CT and MRI. The second tumour, a schwannoma had a very sharply defined shape, with a thick low to medium reflective outer wall and low internal reflectivity. This corresponds to the Antoni A and Antoni B patterns of the excised tumour.
External labeling and algorithms for hierarchic networks
1988
Algorithms for generating internal data structures for networks are given. Data bases for networks can be partitioned hierarchically. Nodes of lower class networks may also be in the interior of a higher class arc which will be split if it is included into the final network. Naming is based either on nodes or on arcs.
Iletrismo
1988
Versión española no publicada de "Combattre l'illettrisme", que se puede encontrar en: Vidal-Beneyto, José y Cassen, Bernard (1987). Lire en Europe. Études sur la culture et la communication (pp. 147-155). AMELA/Conseil de l’Europe, Strasbourg.
La politique royale de l’enseignement du droit en France au XVIIIe siècle. Ses survivances dans le régime moderne
1988
International audience; Résumé à venir
Microgeographic Variation of Genetic Polymorphism in Argyresthia mendica (Lep.: Argyresthiidae)
1988
Field studies on the genetic structure of populations show a considerable amount of heterogeneity in space and time. In many cases, these heterogeneities can be related to structures in the environment, such as properties of soil, availability of special food resources, topographic conditions or climate. In other cases the genetic structure can be explained by properties of the plant and animal species under study, e.g. ability and speed of migration and colonization (Karlin and Nevo 1976; Endler 1977; Nevo 1978; Nevo and Yang 1979; Nevo et al. 1981; Seitz and Komma 1984; Wohrmann 1984).
Improvements of General Multiple Test Procedures for Redundant Systems of Hypotheses
1988
In dieser Arbeit wird untersucht, welche Verscharfungen allgemeiner multipler Testprozeduren moglich sind, wenn die Kenntnis von „Redundanzen“ (logischen Abhangigkeiten) im Hypothesensystem ganz oder teilweise ausgenutzt wird. Fur den Fall gleicher Gewichtung der Elementartests werden mehrere verbesserte „statische“ Prozeduren angegeben, unter denen sich auch die „MSRB-Prozedur“ von Shaffer (1986) befindet. Last man auch ungleiche Gewichtung zu, so erhalt man vier verschiedene „dynamische“ Verbesserungen der Prozedur von Holm (1979), die in aufsteigender Reihenfolge immer trennscharfer, aber auch immer rechenaufwendiger werden. Es werden praktikable Algorithmen vorgestellt, die in einem ent…
Convergence properties of classes of decomposable measures
1988
Algunas microestructuras presentes en las costras calcareas del piedemonte de betera (provincia de valencia)
1988
Las formaciones aluviales que constituyen el piedemonte de betera, situado al norte de la provincia de valencia, presentan a techo de sus secuencias sedimentarias importantes acumulaciones carbonatadas. Las diferentes muestras que se han analizado desde un punto de vista micromorfologico, pertenecientes a las cinco macrofacies descritas en los perfiles seleccionados, permiten reconocer gran variedad de microestructuras. De todas ellas aqui se detallan las que aparecen con mayor frecuencia, tales como laminaciones, oolitica-pisolitica, grietas de retraccion y estructura de raices. Estas microestructuras sugieren condiciones subaereas en la genesis de las costras. (a)
Acides gras des phospholipides plaquettaires et des lipides plasmatiques chez le rat obése Zucker
1988
AbstractThe purpose of this work was to see whether hyperlipaemia observed in genetically obese Zucker rats (fa/fa) was associated with differences in fatty-acid composition of plasma triacylglycerols, plasma phospholipids and of platelet phospholipids, in comparison with the control lean rats (Fa/-).Results showed that plasma triacylglycerols and phospholipids were increased in obese rats. In triacylglycerols, the amount of saturated and monounsaturated fatty acids was highly increased whereas the amount of the n-6 and n-3 polyunsaturated fatty acids was little modified. In plasma phospholipids, saturated and monounsaturated fatty acids were also increased, as were the n-3 fatty acids (exc…
Two new cases of Thrombocytopenia Absent Radius (TAR) syndrome: Clinical, Genetic and Nosologic Features
1988
Two unrelated children affected by TAR syndrome, autosomic recessive disease with congenital thrombocytopenia and bilateral radial aplasia, are described. In the first case a mild thrombocytopenia has been compatible with a fairly normal life until the second year of age. The other child shows radial aplasia associated with other anomalies of the upper limbs, severe thrombocytopenia and leukemoid reaction. The relationship among TAR syndrome, Fanconi's anemia and Roberts' syndrome are briefly discussed.
Evaluation of Oxygen Diffusion Distances in Human Breast Cancer Using Cell Line Specific in Vivo Data: Role of Various Pathogenetic Mechanisms in the…
1988
Radiobiological hypoxia in malignant tumors has been shown to originate (i) from spatial and temporal functional disturbances of tumor microcirculation resulting in a limited convective O2 flux in microregions even in tissue areas exhibiting high vascular densities, and (ii) from morphological abnormalities of the microcirculatory bed leading to a limitation of the diffusive O2 flux. In addition to these pathogenetic mechanisms, systemic factors (anemia, arterial hypoxia) can also play a role in the development of tumor hypoxia.
Gamma(Z --> bb): A signature of hard mass terms for a heavy top
1988
Abstract We calculate analytically the weak radiative corrections to the weak neutral current gauge boson-bottom fermion vertex, keeping the mass mt of the internal fermion line for the relevant diagrams. We find, to order α, a hard mass-term dependence m t 2 M W 2 of the amplitude, for large mt values. Its origin comes from the unphysical charged Higgs coupling to fermions in the renormalizable gauge or, equivalently, from the longitudinal charged gauge boson couplings. The diagonal Z0 decay width to b-quarks decreases, due to these weak radiative corrections, by 0.6%–2.5% when the top mass mt varies from 45 to 200 GeV.
Mainz Pouch for Augmentation Bladder Substitution or Continent Urinary Diversion
1988
Tratamiento del pie equino-varo congénito. : seguimiento a largo plazo
1988
The authors present the treatment of the newborn congenital clavus foot in their Service. After ten years, the global result is satisfactory. The lmhauser's surgical procedure is assumed by the authors but they propose some modífications.
Note critique de "Éducation et société : les défis de l'an 2000" de Jacques Lesourne
1988
International audience
Chlorophenol Compounds in Snow
1988
Polychlorinated phenols, guaiacols and catechols have been studied in snow from North Pole, North, Central and South Finland. Only Central and South Finland samples contained known compounds above limit of determination 0.5 ng/1. Airborne chlorophenol pollution appeared to be very much higher in South than in Central Finland.
Photochemical Reactors Engineering Fundamentals
1988
For the rapidly developing area of Photochemical Reactors Engineering an assessment of some fundamentals is reported. Topics surveyed are light sources, types of photoreactors and radiation modelling approaches. Some general remarks are also reported from which the need for further development of the general research area arises.
Minimax estimation with additional linear restrictions - a simulation study
1988
Let the parameter vector of the ordinary regression model be constrained by linear equations and in addition known to lie in a given ellipsoid. Provided the weight matrix A of the risk function has rank one, a restricted minimax estimator exists which combines both types of prior information. For general n.n.d. A two estimators as alternatives to the unfeasible exact minimax estimator are developed by minimizing an upper and a lower bound of the maximal risk instead. The simulation study compares the proposed estimators with competing least-squares estimators where remaining unknown parameters are replaced by suitable estimates.
Postersitzung 9: Therapeutische Alternativen beim Harnleiterstein
1988
In der heutigen Therapie des Harnleitersteines dominiert eindeutig die ESWL. Bei erfolgloser ESWL oder bei speziellen Indikationen wie grose obere Harnleitersteine oder Steine in Projektion auf die Ileosacralfuge kommen die endourologischen Masnahmen zum Tragen. Die Indikationsbreite fur den Einsatz einer Schlinge ist insbesondere wegen der Gefahr der aufsteigenden Infekte nur noch sehr gering. Da selbst bei anatomischen Veranderungen diese haufig durch endourologische Masnahmen beseitigt werden konnen, steht die offene Schnittoperation im Rahmen der Therapie des Harnleitersteines an letzter Stelle.
Der Ausguß-Stein — Kontroverse Therapiekonzepte und Langzeitergebnisse
1988
Die Extrakorporale Stoswellen-Lithotripsie ist fuhrende Behandlungsform fur die Mehrzahl der nichtabgangsfahigen Nierensteine geworden und hinsichtlich ihrer Indikationsstellung bei der Behandlung kleiner Nierenbecken — oder Kelchsteine unumstritten. Lediglich bei der Behandlung von Ausgussteinen variieren die therapeutischen Konzepte von Klinik zu Klinik teilweise noch erheblich und eine endgultige Beurteilung der verschiedenen Behandlungsprinzipien ist derzeit noch nicht sicher moglich, weil es an Langzeitbeobachtungen fehlt.
Central Neural Blocks
1988
The spinal column consists of vertebral bodies which together form 7 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 4 coccygeal vertebrae (see Transparency 1). A typical vertebra consists of two basic parts: the ventral vertebral body and the dorsal vertebral arch. Between the vertebral bodies are the intervertebral disks, which give the spinal column its flexibility. Together, the vertebral bodies and the intervertebral disks form a strong column supporting the head and trunk, while the vertebral arch protects the spinal cord. When the spinal column is viewed from the side, four flexures are visible: the thoracic and the sacrococcygeal flexures are concave ventrally, while the cervical and…
De l'orientation en fin de cinquième au fonctionnement du collège
1988
Analyse des mécanismes de l'orientation à l'issue de la classe de cinquième, à partir d'une enquête dans 17 collèges de l'Académie de Dijon, représentant 2350 élèves, scolarisés en 1982/1983. Étude de l'impact des caractéristiques socio-démographiques des élèves sur l'orientation à l'issue de la 5ème ; analyse des interactions entre les différents acteurs engagés dans le processus de l'orientation. Analyse de la variété des pratiques d'un collège à l'autre.
Error Bounds for the Numerical Evaluation of Integrals with Weights
1988
This paper is concerned with a procedure of obtaining error bounds for numerically evaluated integrals with weights. If \( - \infty \mathop < \limits_ = a < b\mathop < \limits_ = \infty \), w integrable over [a,b] and positive almost everywhere, then an approximation of \({I_W}f: = \int\limits_a^b {w\left( t \right)f\left( t \right)dt} \) by a quadrature rule \({Q_n}f: = \sum\limits_{i = 0}^n {{\alpha _i}f\left( {{t_i}} \right)} \) is leading to the error Enf ≔ Iwf ‒ Qnf. An algorithm is derived for the computation of bounds for |Enf| depending on the smoothness of the integrand f and on the degree of exactness of Q. As initial values this algorithm needs moments of the weighting function w…
Microbiological and physico-chemical aspects in dry-salted Spanish ham.
1988
The main microbiological and physico-chemical parameters in dry-salted ham previously selected were determined during the elaboration process. All determinations were performed at 2 levels: surface and internal. The selected microbiological parameters were: total aerobes, halotolerant, lactic acid bacteria, yeasts and hazardous microorganisms. NaCl, nitrate, nitrite, water activity, moisture, pH, temperature and loss of weight were selected for the physico-chemical study. All microbial groups showed a similar behaviour, increasing along the first stages up to the third month of drying, then decreasing to numbers similar to the initial ones. Only the halotolerants maintained fairly high numb…
El SAIH en la Cuenca Hidrográfica del Júcar
1988
El SAIH en la Cuenca Hidrográfica del Júcar
Was King Arthur a King by Definition?
1988
Current research in knowledge representation distinguishes between descriptional and assertional interpretations of semantic nets. This paper explores theoretical and applicative problems, which arise from that distinction in a historic domain. A prolog implementation of KL-ONE is used as a vehicle to compare the various alternatives available to represent knowledge related to single elements of the domain insertion or not of this knowledge in semantic nets in their descriptional sense. The final section of the paper discusses the problem in relation to the theories concerning the functioning of proper names from a logical and philosophical point of view.
The diagnostic significance of cholescintigraphy and ultrasound examination in cholestatic syndromes in infancy
1988
Thirty-three neonates and infants with cholestatic syndromes of various etiologies were evaluated by cholescintigraphy and ultrasound examinations. The results of these two diagnostic procedures were compared with the final diagnosis as confirmed by liver biopsy and/or laparotomy and the clinica follow-up of the infants. Fourteen patients had an obstructive cholangiopathy (11 biliary atresia, 2 choledochal cysts, 1 congenital choledochal stenosis), 13 had neonatal hepatitis, and 6 had cholestasis of another etiology. Typical ultrasonic and/or scintigraphic findings confirmed or excluded the need for surgical exploration in 28 patients. Thus, for must infants with cholestatic syndromes it is…
Dynamics of Dense Polymers: A Molecular Dynamics Approach
1988
The physics of polymeric materials[1, 2] is one of the most challenging problems in condensed matter physics today. It is a problem of great interest both from a fundamental viewpoint and for their various technical applications. In addition to theortical and experimental approaches, computer simulations[3–11] have played an important role in our present understanding of polymers. For static properties Monte Carlo methods have been widely used and give excellent results for static critical exponents. To investigate dynamic properties three different methods — Monte Carlo (MC)[3–7], molecular dynamics (MD)[8, 9] and Brownian dynamics methods[10] — have been used. Detailed microscopic dynamic…
Histological and histochemical changes in the colon mucosa after ureterosigmoidostomy or colonic conduit.
1988
A study was made of 22 patients previously subjected to urinary diversion, 12 with ureterosigmoidostomy and 10 with colon conduit. The histological and histochemical examination of biopsies of intestinal mucosa near to and far from the ureteral orifices showed transformations with considerable inflammatory infiltration, variations in the composition of the acid mucins with a prevalence of sialomucins, lengthening and branching of the glandular crypts, and sometimes dysplasias of the epithelium. These structural modifications are typical of transitional mucosa. Transitional mucosa might reflect an aspecific reaction of the intestinal mucosa or alternatively it might signify a precancerous co…