showing 36 of ~574560 from 574555 documents
Relevance of Tool Life Testing for Tool Replacement Strategies
1986
Several analytical and simulation models have been proposed in order to select the optimal tool replacement strategies both in single and multi-tool machining operations. All of these models, however, assume as known the probability density function that describes the stochastic behaviour of tool life. The costly efforts required in order to achieve an accurate estimate of the p.d.f. limits the use in the shop practice of the above models.
Presencia de culto griego en la desembocadura del Ebro: representaciones de Démeter en el Museo Municipal de Reus
1986
The influence of ossein-hydroxyapatite compound ('Ossopan') on the healing of a bone defect.
1986
A study was undertaken in 60 adult rabbits in order to determine the effects of ossein-hydroxyapatite compound on bone healing. Standardized bony defects were produced in the distal femoral epiphyses, after which animals were randomized into four equal groups. An untreated group served as a control. One group received ossein-hydroxyapatite compound, 830 mg per day, a second group received bone mineral (ossein-hydroxyapatite compound reduced to ash, to remove organic constituents), 510 mg per day, and a third group received calcium carbonate, 650 mg per day. A series of fluorescent vital markers was administered to the animals from the 7th to the 32nd day after production of the defect. A th…
Niskociśnieniowa polimeryzacja etylenu wobec katalizatorów wytworzonych z fenoksylowych pochodnych tytanu i seskwietylochloroglinu
1986
The effect of the structure of catalysts of the type left bracket Ti(OPh)//nCl//4 // minus //n plus Al//2Et//3Cl//3 right bracket (n equals 0-4) on their activity in the process of low-pressure ethylene polymerization and on the kinetics of this polymerization has been investigated. The mechanism of the effect of the number of phenoxyl ligands (n) in the titanium-component of the catalyst on the rate constants of the elementary reactions, molecular mass of polyethylene obtained and constants characterizing catalyst activity has been elucidated.
El dispositivo descubierto. Niveles de enunciación en Sleuth
1986
En suma, la puesta en cuestión que Mankiewicz hace de la representación clásica parte de lo siguiente: resquebrajada la norma verosímil del espectáculo cinematográfico, proclamada la distancia del discurso a la historia, deshecha la tríada verosimilitud-punto de vista-identificación, Mankiewicz procede a la disolución de la noción de punto de vista narrativo en la medida en que la regulación del montaje (tanto narrativo como de ubicación, angulación, escala, etc. de los plano) pasa a ser decisiva en su indecisión. Decisiva para el análisis del modelo de representación que la quiere decisiva y que Mankiewicz debilita hasta hacerla desaparecer. Es, pues, el off, el fuera de campo, lo que adqu…
Transició demogràfica i industrialitzaciò a Vilafranca
1986
Vilafranca es una pequeña ciudad de tres mil habitantes, situada en el norte montañoso y rural del País Valencia. Su peculiaridad es la importante industria textil con que cuenta. En el presente trabajo se pretende analizar la relación entre le proceso de desarrollo económico y el comportamiento demográfico a lo largo de este último siglo.
Reaction Rates in the RP-Process and Nucleosynthesis in Novae
1986
Nuclear structure information available on proton rich unstable nuclei were used to evaluate thermonuclear reaction rates in the rp-process in explosive hydrogen burning. These rates were applied in a systematic analysis for a variety of temperature conditions, appropriate to nova explosions, to study nucleosynthesis for isotopes of Ne Na Mg Al Si. The results are discussed in comparison with recent observations of elemental abundances in nova ejecta.
Cycloaddition reactions of benzothiete and hetero dienophiles for the synthesis of heterocyclic systems
1986
Abstract Benzothiete ( 1 ) undergoes cycloaddition reactions with hetero dienophiles with NN-, NO- or CO- double bonds, leading to six-membered heterocyclic ring systems of 2H-3,4-dihydro-1,2,3-benzothiadiazine ( 3 ), 4H-3,1,2-benzoxathiazine ( 4 ) and 4H-3,1-benzoxathiin.
A photoelectrochemical characterization of passive films on stainless steels
1986
Abstract Passive films on stainless steels for sea water service have been studied by means of photocurrent measurements. Four experimental ELI (Extra Low Interstitital) ferritic stainless steels (types 25Cr-4Ni-4Mo) and a commercial superaustenitic stainless steel (type 20Cr-18Ni-6Mo-N) have been investigated. Differences in the photoelectrochemical behaviour have been attributed to the different nature of the passive films grown on ferritic or superaustenitic stainless steels. An interpretation is provided to explain the complex dependence of the photocurrent transients on the applied potential. Manuscript received 27 February 1986; in amended form 19 June 1986.
Componentes químicos de Centaurium linarifolium (Lamark) G. Beck
1986
Conformational behaviour of 2,2?-bipyrrole
1986
The rotational potential around the interannular bond in 2,2′-bipyrrole has been calculated making use of standard minimal STO-3G and split valence 4-31G basis sets. Geometrical optimization concerning the most significant interannular internal parameters has been performed with both basis sets. The trans conformer is predicted to be more stable than the cis. The minimal basis set predicts the existence of a cisoid-gauche minimum which after limited optimization becomes very shallow and it seems to be an artifact of the rigid rotor approximation. At 4-31G level, both the trans and cis conformers represent maxima in the potential curve and two gauche minima appear at θ=46.0° and θ=147.6°, th…
Los magistrados monetales de Valentia
1986
specification of a tool for viewing program text
1986
The maintenance of large programs is a demanding process where lot of information is needed. Much of this information is in the program text. However, the finding of the needed information may be very difficult. It seems evident that more powerful tools are needed for helping the maintainers to find the information they need.
Injerto de fibrocart1lago meniscal en los defectos osteocondrales : estudio experimental
1986
The authors report an experimental work with 18 rabbits. An osteochondral deffect is tailored in the weight-bearing area of the medial condile of the knee, this osteochondral deffect is refilled with a matching piece taken from the lateral meniscus. An optical histological examination and triptium-timidine up-take are performed three days after refilling time in one, two, three, four, six, eight, ten and twelve weeks. This study showed the meniscus graft maintaining its whole histological structure and taking the triptium-timidine along all the experiment length, with a perfect fitting and union with the bone tissue.
Observación de 3 casos de hematomas extradurales traumáticos agudos resueltos espontáneamente
1986
Se presentan 3 casos de hematomas extradurales agudos traumáticos con mínima repercusión neurológica que no precisaron la evacuación quirúrgica, reabsorbiéndose espontáneamente. La Tomografía Axial Computarizada de control pasado el mes del traumatismo reveló la reabsorción completa del hematoma en los 3 casos. Se concluye que la Tomografía Axial Computarizada permite identificar" una nueva categoría de pacientes con hematomas extradurales agudos traumáticos que puede que no precisen de la evacuación quirúrgica inmediata.
On the preparation of simple and universal buffers including polynuclear species
1986
A simple generalized procedure for the calculation of electrolyte concentrations in pH-buffers is proposed. Mixtures of acid-base systems and formation of polynuclear species at high ionic strengths are considered, and a diagram useful for the study and preparation of the buffers is shown.
Coût et financement de la santé à Madagascar
1986
référence interne : 86067
Arcana d’Edgard Varèse, thématique et espace des hauteurs, un univers musical en expansion
1986
International audience
El espacio hermético en el primer modelo de film weimariano
1986
Análisis de la construcción espacial en el plano en el llamado expresionismo cinematográfico, en relación con el estatismo pictórico y la saturación plástica.
Immunohistochemical Investigation in Experimental Intracerebral Hemorrhage (ICH) and Its Correlation with Findings in Clinical Studies
1986
Since McKissock et al. 1961 investigated the effects of surgical and conservative treatment of ICH on final outcome it is well known that systemic hypertension worsens the prognosis of this serious cerebrovascular disease. Our own studies on this problem have revealed differences in final outcome, as well as in level of consciousness after ICH, between normotensive and hypertensive patients. Whilst 30.6% of the normotensive patients died, 48.1% of the hypertensive patients had a lethal outcome.
La défense du produit et le disfonctionnement du système économique
1986
Pour arriver à la connaissance de l'économie monétaire, il est indispensable de tenir compte de l'origine et de l'emploi de la monnaie ; il est non moins indispensable cependant de savoir comment la monnaie est intégrée à l'économie de production. Cette intégration est le pivot sur lequel nous nous proposons de fonder notre étude, dont le point de départ pourrait être l'acquisition de la connaissance véritable de la monnaie, qui joue un rôle essentiel dans nos sociétés économiques. En soulignant certains problèmes centraux, cette connaissance permettrait d'éviter quelques-uns des maux qui frappent nos économies, notamment le dysfonctionnement du système économique, dont l'une des causes est…
Estudios polínicos de la flora autóctona valenciana : Convolvulaceae
1986
Se estudian los caracteres palinológicos referentes a forma, tamaño, ornamentación, apertura y estructura de la exina, en las doce especies de la familia Convolvulaceae presentes en el área valenciana, las cuales se pueden separar en cuatro tipos polínicos distintos, que se corresponden con cada uno de los cuatro géneros representados: Calystegia R. Br., Convolvulus I.., Cressa I.., y Cuscata I., encontrándose diferencias dentro de cada tipo que, en algunos casos, permiten discriminar especies. Palynological characters in report with size, shape, ornamentation and exine structure, are studied on the twelve species representated on the valencian area. Four palynological types are recognized,…
Wer zählt die Völker, nennt die Namen? oder Die EULERsche Polyederformel
1986
Nachdem wir im Abschnitt uber Induktion die Lander gewisser Landkarten gefarbt haben, wollen wir diese Lander nun zahlen. Wir werden eine auserordentlich nutzliche Formel herleiten, die auf den grosen Mathematiker L. Euler (1707–1783) zuruckgeht. Diese „Eulersche Polyederformel“ stellt einen Zusammenhang zwischen den Anzahlen der Lander, Grenzen und „Ecken“ einer beliebigen Landkarte her.
Del negocio y del amor: el diario del mercader Pere Seriol (1371)
1986
Estudios ecológicos de un transecto dunar. II. Fenología.
1986
Ecological studies on a dune transect. II. Phenology. A phenologic sampling of a population including 78 plant species, made following Ellenberg's method, has been used to assess the differential effect of wind and other climatic factors on the phenology of plant species and communities that inhabit the great dune named El Pujol, in the Devesa de l'Albufera, near Valencia (Spain). The wind do not produce fase differences at the beginning of phenologic process, but it generates a reduction on time of these processes -leaf emission, growth, floration. The eolian effect operate on the comunities located near the coastline and exposed. The shoreward communities, protected against the wind, and …
General Introduction to Computer Simulation Methods
1986
Computer simulation methods are now an established tool in many branches of science. The motivation for computer simulations of physical systems are manifold. One of the main motivations is that one eliminates approximations with computer simulations. Usually to treat a problem analytically (if it can be done at all) one needs to resort to some kind of approximation; for exam- ple a mean-field-type approximation. With a computer simulation we have the ability to study systems not yet tractable with analytical methods. The computer simulation approach allows one to study complex systems and gain insight into their behaviour. Indeed, the complexity can go far beyond the reach of present analy…
L'artisanat rural dans la Beauce au XIXème siècle
1986
Liikuntaseura sosiaalisena organisaationa : tutkimusviitekehys
1986
Suomalaisen liikuntakulttuurin perustavanlaatuinen toimintayksikkö ja primus motor on liikuntaseura. Liikuntaseurojen toiminta perustuu vapaaehtoisuuteen ja jäsenistön itsensä määrittelemiin "keskinäisen hyödyn" intresseihin ja pyrkimyksiin. Tässä suhteessa liikuntaseurat sosiaalisina organisaatioina erovat selvästi monista muista organisaatioista. Tästä syystä hallintotieteelliset organisaatioteoriat, talouselämästä lainatut toimintastrategiat tai hallinto- ja johtamismenettelyt eivät välttämättä päde liikuntaseurojen kohdalla, vaan ne saattavat olla jopa ristiriidassa niiden organisatorisen erityisluonteen kanssa. Onkin perusteltua, että liikuntaseurojen sosiaalista organisaatiota tutkita…
A new electrophilic addition to acetylenes. Synthesis of 1,2-iodofunctionalized olefins
1986
Abstract Acetylenes react with bis(pyridine)iodo(I) tetrafluoroborate ( 1 ) in the presence of a wide variety of nucleophiles (F, Cl, Br, I, SCN, pyridine, OAc, anisole, H) to give 1,2-iodofunctionalized olefins ( 4 ).
CP nonconservation at he Z0 Peak
1986
The measurement of a nonvanishing asymmetry α≡[Γ(sb¯)−Γ(s¯b)][Γ(sb¯)+Γ(s¯b)] would signal CP nonconservation in Z0 decays. We study here this effect within the standard model. In the three-generation case, the α value comes out small because of the effective degeneracy of u and c quarks at these high energies. In the four-generation case, results are encouraging for the CERN e+e− collider LEP: One could have a branching ratio of this flavor-changing decay to the flavor-conserving one of ∼10−6 and reach α values near unity.
Efectos de la inmovilización prolongada sobre la cadera de la rata en crecimiento
1986
An experimental work involving immobilization of the right limbs of growing rats in functional position for a period of four weeks was performed. Histological, histochemical and blood supply distribution studies proved disorganization at different degrees in the femoral hea.d inviding the vessels from the eiphyseal «perichondral ring», causing the early ossification of the head.
Noch mehr kariertes Papier
1986
In diesem Abschnitt wollen wir einige Anwendungen der im vorigen Abschnitt bewiesenen Formel von Pick herleiten.
Tungsten-mannitol and sorbitol complexes: Structural characterization by IR and carbon-13 nuclear magnetic resonance spectroscopy
1986
Abstract Polarimetric and spectrophotometric studies of the mannitol-tungsten(IV) system show the formation of three table complexes. Their stoichiometries, degrees of condensation and interconversion equilibria have been studied. The structure of these compounds has been investigated by 13C NMR spectroscopy in aqueous solution and by IR spectroscopy in the solid state for the two species stable at pH
Языковые единицы и условия их актуализации
1986
На материале германских, романских, а также латышского языков в сборнике исследуется взаимодействие языковых единиц разных уровней с макро и микроконтекстом. Рассматриваются процессы, сопровождающие взаимодействие текста и слова, а также зависимость этих процессов от коммуникативной и прагматической установок. Уделяется внимание лексикографическим процессам и тенденциям, а также проблемам словопроизводства, отражающим изменения, происходящие в языке.
microwave effects on isolated chick embrio heart
1986
This study was designed to examine the effects of microwaves on the electric activity of hearts as a means of elucidating interactive mechanisms of nonionizing radiation with cardiac tissue. Experiments were performed on isolated hearts of 9-12-day-old chick embryos placed in small petri dishes. Oxygenated isotonic Ringer's solution at 37 degrees C permitted heart survival. Samples were irradiated at 2.45 GHz with a power density of 3 mW/cm2. The heart signal was detected with a glass micropipet inserted into the sinoatrial node and examined by means of a Berg-Fourier analyzer. Pulsed microwaves caused the locking of the heartbeat to the modulation frequency, whereas continuous wave irradia…
Fast preparation and gas-chromatographic separation of lanthanide and actinide hexafluoroacetylacetonates
1986
A fast method for the separation of lanthanide elements by gas chromatography of their hexafluoroacetylacetonates is described. Individual lanthanides can be isolated within a few minutes, and the whole group can be separated in less than 10 min. The hexafluoroacetylacetonates are applied in form of mixed complexes with tri-n-butyl phosphate or trioctylphosphine oxide prepared by fast extraction into quasi-solid solvents. The applicability of this method for the separation of trivalent actinide elements is shown, including the fast preparation of thin counting samples.