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The behaviour of epoxy resins with particular reference to the influence of bond strength and curing conditions on the performance of screeds / Salah Eddine Boudraa
Titre : The behaviour of epoxy resins with particular reference to the influence of bond strength and curing conditions on the performance of screeds Type de document : texte imprimé Auteurs : Salah Eddine Boudraa, Auteur ; D. R. Plum, Directeur de thèse Editeur : University of Newcastle Upon Tyne Année de publication : 1985 Importance : 154 f. Présentation : ill. Format : 27 cm. Note générale : Mémoire de Master : Génie Civil : Angleterre, University of Newcastle Upon Tyne : 1985
Bibliogr. f. 155 - 165 . Annexes: [162 f.]Langues : Anglais (eng) Mots-clés : Epoxy resin concrete
Polymers
Inherent stickiness
Binders
Indirect tensile strengthsIndex. décimale : Ms00185 Résumé : This thesis aimed to begin the work of investigating the physical and mechanical properties of epoxy resin concrete and to assess the influence of different curing regimes on the behaviour of such resins.
It is started by an introduction into the chemistry of polymers.
Since polymers are used as binders in resin concrete, to grasp the behaviour of such polymers is very important in the understanding of the behaviour of polymer concrete.
A description of the different kinds of concrete using polymers is then carried out.
Practical considerations as well as theoretical ones are considered for the epoxy resin concrete flooring.
In the experimental procedure a new technique of testing as well as new instrumentation have been thought of to assess the bond strength ability.
And this has been done for the five different types of epoxy resins available used throughout the experimental procedure.
Because of the inherent stickiness of the binders and the small quantities involved in the mixing, new techniques for moulding and demoulding the specimens have been used to avoid the problems arising from such difficulties.
The compressive and indirect tensile strengths of the five different types of epoxy resins have been assessed together with the influence of different curing regimes including variations in length of cure and curing temperatures.
The behaviour of the epoxy resins under different rates of loading and periods of cure was looked at.
The compressive modulus of elasticity was calculated for the fastest rate of loading and compared with the values given by the manufacturers when available.
The other values of compressive and indirect tensile strengths were also compared with the values in the literature when available.
Finally, a modest preliminary work into the creep properties, due to the lack of precise instrumentation within the time allowed for the practical work (instantaneous strain measurement devices, compressive loading machine capable of self adjustment...) was carried out.
Therefore the creep data presented is merely sufficient for comparison purposes between the different epoxy resins available or for grasping the importance of creep for such materials when looking at the data representing the amplitude of the creep strains.The behaviour of epoxy resins with particular reference to the influence of bond strength and curing conditions on the performance of screeds [texte imprimé] / Salah Eddine Boudraa, Auteur ; D. R. Plum, Directeur de thèse . - [S.l.] : University of Newcastle Upon Tyne, 1985 . - 154 f. : ill. ; 27 cm.
Mémoire de Master : Génie Civil : Angleterre, University of Newcastle Upon Tyne : 1985
Bibliogr. f. 155 - 165 . Annexes: [162 f.]
Langues : Anglais (eng)
Mots-clés : Epoxy resin concrete
Polymers
Inherent stickiness
Binders
Indirect tensile strengthsIndex. décimale : Ms00185 Résumé : This thesis aimed to begin the work of investigating the physical and mechanical properties of epoxy resin concrete and to assess the influence of different curing regimes on the behaviour of such resins.
It is started by an introduction into the chemistry of polymers.
Since polymers are used as binders in resin concrete, to grasp the behaviour of such polymers is very important in the understanding of the behaviour of polymer concrete.
A description of the different kinds of concrete using polymers is then carried out.
Practical considerations as well as theoretical ones are considered for the epoxy resin concrete flooring.
In the experimental procedure a new technique of testing as well as new instrumentation have been thought of to assess the bond strength ability.
And this has been done for the five different types of epoxy resins available used throughout the experimental procedure.
Because of the inherent stickiness of the binders and the small quantities involved in the mixing, new techniques for moulding and demoulding the specimens have been used to avoid the problems arising from such difficulties.
The compressive and indirect tensile strengths of the five different types of epoxy resins have been assessed together with the influence of different curing regimes including variations in length of cure and curing temperatures.
The behaviour of the epoxy resins under different rates of loading and periods of cure was looked at.
The compressive modulus of elasticity was calculated for the fastest rate of loading and compared with the values given by the manufacturers when available.
The other values of compressive and indirect tensile strengths were also compared with the values in the literature when available.
Finally, a modest preliminary work into the creep properties, due to the lack of precise instrumentation within the time allowed for the practical work (instantaneous strain measurement devices, compressive loading machine capable of self adjustment...) was carried out.
Therefore the creep data presented is merely sufficient for comparison purposes between the different epoxy resins available or for grasping the importance of creep for such materials when looking at the data representing the amplitude of the creep strains.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire Ms00185 Ms00185 Papier Bibliothèque centrale Mémoire de Master Disponible Documents numériques
BOUDRAA.Salah-Eddine.pdfURL The effect of empty running on vehicle operating costs and commodity prices in a developing country / Boubekeur Akacem
Titre : The effect of empty running on vehicle operating costs and commodity prices in a developing country Type de document : texte imprimé Auteurs : Boubekeur Akacem, Auteur ; M. R. John, Directeur de thèse Editeur : Cranfield : [s.n.] Année de publication : 1983 Importance : 55 f. Présentation : ill. Format : 30 cm. Note générale : Mémoire de Master : Génie Industriel : Angleterre, Cranfield Institute of Technology : 1983
Bibliogr. f. 56 . Annexe f. 57 - 79Langues : Anglais (eng) Mots-clés : Road haulage vehicles
Freight industry
AlgeriaIndex. décimale : Ms00383 Résumé : The aim of this study is investigative rather than problem solving.
It is concerned with measuring the level of empty running of the road haulage vehicles of the Algerian national freight industry.
The consequences of this underutilization of vehicles on vehicle operating costs and the cost effects on commodities carried is calculated.The effect of empty running on vehicle operating costs and commodity prices in a developing country [texte imprimé] / Boubekeur Akacem, Auteur ; M. R. John, Directeur de thèse . - Cranfield : [s.n.], 1983 . - 55 f. : ill. ; 30 cm.
Mémoire de Master : Génie Industriel : Angleterre, Cranfield Institute of Technology : 1983
Bibliogr. f. 56 . Annexe f. 57 - 79
Langues : Anglais (eng)
Mots-clés : Road haulage vehicles
Freight industry
AlgeriaIndex. décimale : Ms00383 Résumé : The aim of this study is investigative rather than problem solving.
It is concerned with measuring the level of empty running of the road haulage vehicles of the Algerian national freight industry.
The consequences of this underutilization of vehicles on vehicle operating costs and the cost effects on commodities carried is calculated.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire Ms00383 Ms00383 Papier Bibliothèque centrale Mémoire de Master Disponible Documents numériques
AKACEM.Boubekeur.pdfURL
Titre : The effect of shape and welding on the fatigue behaviour of steel Type de document : texte imprimé Auteurs : Mohamed Bachir Ghanem, Auteur ; R. Fenn, Directeur de thèse Editeur : Université Brunel Année de publication : 1981 Importance : 59 f. Présentation : ill. Format : 29 cm. Note générale : Mémoire de Master : Metallurgical Quality Control : Angleterre, Université Brunel : 1981
Bibliogr. [5] f. Annexe [75] fLangues : Anglais (eng) Mots-clés : EN8 steel
Flat samples
Welded samples
Samples shaped
Fatigue characteristicsIndex. décimale : Ms00181 Résumé : The influence of geometric section on the fatigue properties of EN8 steel was investigated by comparing the results obtained in fatigue tests on:
a/ Flat samples.
b/ Welded samples.
c/ Samples shaped to simulate the weld bead profile.
It was found that the three sets of samples had significantly different fatigue characteristics.
The fatigue loads which the samples could bear increased in the order welded, shaped and flat samples.
Attempts were made to correlate these results by evaluating the stress concentration at the weld toe.
Although this satisfactorily explained the differences in fatigue behaviour between the flat and the shaped samples it could not account for the results on the welded samples.
Subsequent metallographic work using optical and electron optical techniques showed that microstructural changes in the heat affected zone were responsible for the lack of correlation.
These observations contradict the results of previous published work.
The conclusion drawn from this investigation can provide a basis for a rational desing code for fatigue loaded welded joints.The effect of shape and welding on the fatigue behaviour of steel [texte imprimé] / Mohamed Bachir Ghanem, Auteur ; R. Fenn, Directeur de thèse . - [S.l.] : Université Brunel, 1981 . - 59 f. : ill. ; 29 cm.
Mémoire de Master : Metallurgical Quality Control : Angleterre, Université Brunel : 1981
Bibliogr. [5] f. Annexe [75] f
Langues : Anglais (eng)
Mots-clés : EN8 steel
Flat samples
Welded samples
Samples shaped
Fatigue characteristicsIndex. décimale : Ms00181 Résumé : The influence of geometric section on the fatigue properties of EN8 steel was investigated by comparing the results obtained in fatigue tests on:
a/ Flat samples.
b/ Welded samples.
c/ Samples shaped to simulate the weld bead profile.
It was found that the three sets of samples had significantly different fatigue characteristics.
The fatigue loads which the samples could bear increased in the order welded, shaped and flat samples.
Attempts were made to correlate these results by evaluating the stress concentration at the weld toe.
Although this satisfactorily explained the differences in fatigue behaviour between the flat and the shaped samples it could not account for the results on the welded samples.
Subsequent metallographic work using optical and electron optical techniques showed that microstructural changes in the heat affected zone were responsible for the lack of correlation.
These observations contradict the results of previous published work.
The conclusion drawn from this investigation can provide a basis for a rational desing code for fatigue loaded welded joints.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire Ms00181 Ms00181 Papier Bibliothèque centrale Mémoire de Master Disponible Documents numériques
GHANEM.Mohamed.pdfURL The effects of a corrosive environment on crack growth rate in chainsteel / A. Amirat
Titre : The effects of a corrosive environment on crack growth rate in chainsteel Type de document : texte imprimé Auteurs : A. Amirat, Auteur ; W.J. Plumbridge, Directeur de thèse Editeur : Bristol : [s.n.] Année de publication : 1987 Importance : 111 f. Présentation : ill. Format : 30 cm. Note générale : Master of science : Environment : University of Bristol : 1987
Bibliogr. f. 47 - 50Langues : Anglais (eng) Mots-clés : Corrosive
Environment
ChainsteelIndex. décimale : Ms00787 Résumé : The work presented in this thesis, is a study of the effects of a corrosive environment (3.5% NaC1 solution) on crack growth in tempered chainsteel.
Crack growth rates have been investigated in single-edge notched specimens.
For growth rates above 10-⁵mm/cycle fatigue crack growth is independent of tempering temperature.
A drop of frequency from 78 Hz to 0.6 Hz causes an increase of fatigue crack growth in air by a factor of two.
At the lower frequency, in the corrosive environment fatigue crack growth is faster than that in air.
These effects are attributed to the fatigue crack tip - environment interaction.
Apart from the general observation that Kiscc decreases as the yield strength increases, a significant difference in Kiscc is observed for the 500 °C temper condition according to the specimen location in the heat treated bar.
This effect is associated with the hardness difference (10 to 15 Hv30) existing between the outer and inner specimens.
Residual stresses in the parent bar after tempering have been found to be compressive at the surface and tensile within the core.
However, manufacture of the thin testpiece eliminated most of the residual stresses.The effects of a corrosive environment on crack growth rate in chainsteel [texte imprimé] / A. Amirat, Auteur ; W.J. Plumbridge, Directeur de thèse . - Bristol : [s.n.], 1987 . - 111 f. : ill. ; 30 cm.
Master of science : Environment : University of Bristol : 1987
Bibliogr. f. 47 - 50
Langues : Anglais (eng)
Mots-clés : Corrosive
Environment
ChainsteelIndex. décimale : Ms00787 Résumé : The work presented in this thesis, is a study of the effects of a corrosive environment (3.5% NaC1 solution) on crack growth in tempered chainsteel.
Crack growth rates have been investigated in single-edge notched specimens.
For growth rates above 10-⁵mm/cycle fatigue crack growth is independent of tempering temperature.
A drop of frequency from 78 Hz to 0.6 Hz causes an increase of fatigue crack growth in air by a factor of two.
At the lower frequency, in the corrosive environment fatigue crack growth is faster than that in air.
These effects are attributed to the fatigue crack tip - environment interaction.
Apart from the general observation that Kiscc decreases as the yield strength increases, a significant difference in Kiscc is observed for the 500 °C temper condition according to the specimen location in the heat treated bar.
This effect is associated with the hardness difference (10 to 15 Hv30) existing between the outer and inner specimens.
Residual stresses in the parent bar after tempering have been found to be compressive at the surface and tensile within the core.
However, manufacture of the thin testpiece eliminated most of the residual stresses.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire Ms00787 Ms00787 Papier Bibliothèque centrale Mémoire de Master Disponible
Titre : The influence of correlation on antenna diversity Type de document : texte imprimé Auteurs : Wafa Krouka, Auteur ; Aksas, Rabia, Directeur de thèse Editeur : [S.l.] : [s.n.] Année de publication : 2015 Importance : 24 f. Présentation : ill. Format : 30 cm. Accompagnement : 1 CD-ROM. Note générale : Mémoire de Master: Électronique : Alger, École Nationale Polytechnique : 2015
Bibliogr. f. 25 . Annexe f. 26 - 28Langues : Anglais (eng) Mots-clés : Diversity
polarization
spatial diversity
correlation
mutual couplingIndex. décimale : Ms09615 Résumé : Despite the evolution of wireless communications, it always suffers from signal fading problems
caused by multipath. In our work, results of using antenna polarization diversity have been exposed to
prove its efficiency in combating fading problems. Different receive antenna systems based on
polarization diversity have been used to be evaluated after a received data acquisition using Arduino
board and Matab.
A second type of antenna diversity have been used to study the influence of correlation on antenna
diversity. Based on antenna spatial diversity, a new structure have been simulated for different
distances separating its constituent elements. A comparison has been done between different
transmission coefficients of the simulated structure as a function of the separating distance.The influence of correlation on antenna diversity [texte imprimé] / Wafa Krouka, Auteur ; Aksas, Rabia, Directeur de thèse . - [S.l.] : [s.n.], 2015 . - 24 f. : ill. ; 30 cm. + 1 CD-ROM.
Mémoire de Master: Électronique : Alger, École Nationale Polytechnique : 2015
Bibliogr. f. 25 . Annexe f. 26 - 28
Langues : Anglais (eng)
Mots-clés : Diversity
polarization
spatial diversity
correlation
mutual couplingIndex. décimale : Ms09615 Résumé : Despite the evolution of wireless communications, it always suffers from signal fading problems
caused by multipath. In our work, results of using antenna polarization diversity have been exposed to
prove its efficiency in combating fading problems. Different receive antenna systems based on
polarization diversity have been used to be evaluated after a received data acquisition using Arduino
board and Matab.
A second type of antenna diversity have been used to study the influence of correlation on antenna
diversity. Based on antenna spatial diversity, a new structure have been simulated for different
distances separating its constituent elements. A comparison has been done between different
transmission coefficients of the simulated structure as a function of the separating distance.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire Ms09615A Ms09615 Papier Bibliothèque centrale Mémoire de Master Disponible Documents numériques
KROUKA.Wafa.pdfURL The influence of the support on the behaviour of supported metal catalysts in hydrocarbon hydrogenation reactions / Belkacem Boumarafi
Titre : The influence of the support on the behaviour of supported metal catalysts in hydrocarbon hydrogenation reactions Type de document : texte imprimé Auteurs : Belkacem Boumarafi, Auteur ; G. Webb, Directeur de thèse Editeur : Glasgow : University of Glasgow Année de publication : 1986 Importance : 82 f. Présentation : ill. Format : 30 cm. Note générale : Mémoire de Master : Génie Chimique : Royaume-Uni, University of Glasgow : 1986
Bibliogr. f. 83 - 86Langues : Anglais (eng) Mots-clés : Platinum
Rhodium
Metal surfaces
HydrogenationIndex. décimale : Ms01186 Résumé : Platinum and rhodium metal catalysts supported on a transition metal oxide titania, and on the non-transition metal oxides alumina and silica have been used to determine the possible effects of Metal-Support Interactions on metal surface areas and the catalytic hydrogenation of buta-1:3-diene.
The adsorption of [¹⁴C] carbon monoxide on platinum and rhodium metal surfaces has been used to determine the metal surface area for each catalyst.
The results of these determinations have shown that metal-support interactions are extant, particularly in the platinum and rhodium supported on titania catalysts, as revealed by a decrease in metal area following high-temperature reduction in hydrogen.
Temperature-programmed reduction, has been used and the shapes of the reduction profiles determined for each catalyst.
Comparisons have been made between platinum and rhodium supported on various oxides with regard to the structure of the reduction profiles, which vary from support to support particularly with regard to the temperature at which the main peak in the profile occurs.
The hydrogenation of buta-1:3-diene over these catalysts has been found to occur in two distinct stages.
In the first stage of the reaction buta-1:3-diene was predominantly hydrogenated to n-butenes, together with small amounts of n-butane, whilst in the second stage which was accompanied by an increase in rate, the n-butenes were further hydrogenated to n-butane.
All three isomeric n-butenes are observed as initial products, but-1-ene being the major product over each catalyst and cis-but-2-ene being only a minor product.
The selectivities for butene formation are relatively high over all catalysts studied.
The variation of reduction temperatures of the catalysts, which causes a variation in surface area does not affect either the initial butene distributions or selectivities over any of the catalysts.
Each catalyst underwent a change in activity with usage.
With the platinum catalysts this was of the form of a straight deactivation to a steady state activity.
However, with the rhodium catalysts the activity at first increased with usage passing through a maximum before following a normal deactivation curve to a steady state activity.
Activation energies were determined for each catalyst.
With most catalysts the variation of reduction temperatures did not affect the activation energy values except with Pt on TiO2, which gave a significantly higher value of activation energies when reduced at high temperature, suggesting the possibility that, in this case, metal-support interactions may have some effect on the activation energy.The influence of the support on the behaviour of supported metal catalysts in hydrocarbon hydrogenation reactions [texte imprimé] / Belkacem Boumarafi, Auteur ; G. Webb, Directeur de thèse . - Glasgow : University of Glasgow, 1986 . - 82 f. : ill. ; 30 cm.
Mémoire de Master : Génie Chimique : Royaume-Uni, University of Glasgow : 1986
Bibliogr. f. 83 - 86
Langues : Anglais (eng)
Mots-clés : Platinum
Rhodium
Metal surfaces
HydrogenationIndex. décimale : Ms01186 Résumé : Platinum and rhodium metal catalysts supported on a transition metal oxide titania, and on the non-transition metal oxides alumina and silica have been used to determine the possible effects of Metal-Support Interactions on metal surface areas and the catalytic hydrogenation of buta-1:3-diene.
The adsorption of [¹⁴C] carbon monoxide on platinum and rhodium metal surfaces has been used to determine the metal surface area for each catalyst.
The results of these determinations have shown that metal-support interactions are extant, particularly in the platinum and rhodium supported on titania catalysts, as revealed by a decrease in metal area following high-temperature reduction in hydrogen.
Temperature-programmed reduction, has been used and the shapes of the reduction profiles determined for each catalyst.
Comparisons have been made between platinum and rhodium supported on various oxides with regard to the structure of the reduction profiles, which vary from support to support particularly with regard to the temperature at which the main peak in the profile occurs.
The hydrogenation of buta-1:3-diene over these catalysts has been found to occur in two distinct stages.
In the first stage of the reaction buta-1:3-diene was predominantly hydrogenated to n-butenes, together with small amounts of n-butane, whilst in the second stage which was accompanied by an increase in rate, the n-butenes were further hydrogenated to n-butane.
All three isomeric n-butenes are observed as initial products, but-1-ene being the major product over each catalyst and cis-but-2-ene being only a minor product.
The selectivities for butene formation are relatively high over all catalysts studied.
The variation of reduction temperatures of the catalysts, which causes a variation in surface area does not affect either the initial butene distributions or selectivities over any of the catalysts.
Each catalyst underwent a change in activity with usage.
With the platinum catalysts this was of the form of a straight deactivation to a steady state activity.
However, with the rhodium catalysts the activity at first increased with usage passing through a maximum before following a normal deactivation curve to a steady state activity.
Activation energies were determined for each catalyst.
With most catalysts the variation of reduction temperatures did not affect the activation energy values except with Pt on TiO2, which gave a significantly higher value of activation energies when reduced at high temperature, suggesting the possibility that, in this case, metal-support interactions may have some effect on the activation energy.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire Ms01186 Ms01186 Papier Bibliothèque centrale Mémoire de Master Disponible Documents numériques
BOUMARAFI.Belkacem.pdfURL The mechanical and physical properties of epoxy resins and their influence on the performance of screeds / O. Bendeddouche
Titre : The mechanical and physical properties of epoxy resins and their influence on the performance of screeds Type de document : texte imprimé Auteurs : O. Bendeddouche, Auteur ; D. R. Plum, Directeur de thèse Editeur : University of Newcastle Upon Tyne Année de publication : 1985 Importance : 152 f. Présentation : ill. Format : 30 cm. Note générale : Mémoire de Master : Génie Civil : Angleterre, University of Newcastle Upon Tyne : 1985
Bibliogr. [5] f. Annexe [15] fLangues : Anglais (eng) Mots-clés : Epoxy resin mortars
Shrinkage
Linear thermal expansion
Flexural strength
CorrelationIndex. décimale : Ms00985 Résumé : The physical and mechanical properties of five Epoxy resin mortars, having different formulations, have been investigated.
The ultimate shrinkage is found to compare with that of P.C. concrete.
It ranges between 0.03 and 0.06%.
However, the rate of development of shrinkage is much higher than of P.C. concrete.
The coefficient of linear thermal expansion is 3 to 5 times that of P.C. contrete.
It ranges between 32 x 10⁻⁶ °/C within a temperature range of 20 to 40°C.
However, it does not remain constant beyond 40°C.
At room temperature, the rate of development of the flexural strength is significantly higher than that of P.C. concrete.
The ultimate value is about 4 to 6 times that of a high-strength P.C. concrete.
The modulus of elasticity in tension is generally lower than the one in flexure which is of the order of that P.C. concrete.
Poisson's ratio ranges between 0.16 and 0.30.
Most of the values are higher than 0.2 which is higher than that of P.C. concrete.
The development of the flexural modulus of elasticity at three different curing temperatures has been examined.
It is higher than that of P.C. concrete.
It has been observed that, in general, the higher the curing temperature the higher the ultimate value.
This is in the range of about 18 ̴ 25 KN/mm² (at 20°C), 22 ̴ 29 KN/mm² (at 50°C) and 23 ̴ 31 KN/mm² (at 70°C).
The correlation between curing temperature and rate of development of the flexural modulus of elasticity was not general.
The effect of post-curing on the flexural modulus of elasticity, after this had stabilized, has been investigated.
Post-curing at higher temperatures for 24 hours has not been found to have the same effect as curing entirely at the same temperature.
Generally, the flexural modulus of elasticity increased up to a certain post-curing temperature after which it decreased.
This has been attributed to a partial loss of bond between matrix and aggregate.
The effect of applied stress and that of age at first loading on creep in flexure has been examined on one of the E.R. mortars (Screed.G).
The creep increases with the increase of stress level ranging between 1/3 and 2/3.
The effect of age at first loading was noticeable only between 1 and 5 days.
At any applied stress and any age at first loading investigated, the creep showed primary, secondary and tertiary stage followed by failure of the specimens.
No general correlation has been observed between the creep coeffocoent and stress level.
Various cases of failure have been reported, where E.R. mortars screeds were applied on inadequately prepared P.C. concrete surfaces.
Due to the weak or inexistent bond between the topping and the substrate, any excess in linear expansion would cause instability failure of the topping.
Also, the case, where the substrate surface has been adequately prepared but possess geometrical imperfections, has been considered.
From a theoretical approach, the critical value of the linear expansion strain, likely to cause failure, is derived.The mechanical and physical properties of epoxy resins and their influence on the performance of screeds [texte imprimé] / O. Bendeddouche, Auteur ; D. R. Plum, Directeur de thèse . - [S.l.] : University of Newcastle Upon Tyne, 1985 . - 152 f. : ill. ; 30 cm.
Mémoire de Master : Génie Civil : Angleterre, University of Newcastle Upon Tyne : 1985
Bibliogr. [5] f. Annexe [15] f
Langues : Anglais (eng)
Mots-clés : Epoxy resin mortars
Shrinkage
Linear thermal expansion
Flexural strength
CorrelationIndex. décimale : Ms00985 Résumé : The physical and mechanical properties of five Epoxy resin mortars, having different formulations, have been investigated.
The ultimate shrinkage is found to compare with that of P.C. concrete.
It ranges between 0.03 and 0.06%.
However, the rate of development of shrinkage is much higher than of P.C. concrete.
The coefficient of linear thermal expansion is 3 to 5 times that of P.C. contrete.
It ranges between 32 x 10⁻⁶ °/C within a temperature range of 20 to 40°C.
However, it does not remain constant beyond 40°C.
At room temperature, the rate of development of the flexural strength is significantly higher than that of P.C. concrete.
The ultimate value is about 4 to 6 times that of a high-strength P.C. concrete.
The modulus of elasticity in tension is generally lower than the one in flexure which is of the order of that P.C. concrete.
Poisson's ratio ranges between 0.16 and 0.30.
Most of the values are higher than 0.2 which is higher than that of P.C. concrete.
The development of the flexural modulus of elasticity at three different curing temperatures has been examined.
It is higher than that of P.C. concrete.
It has been observed that, in general, the higher the curing temperature the higher the ultimate value.
This is in the range of about 18 ̴ 25 KN/mm² (at 20°C), 22 ̴ 29 KN/mm² (at 50°C) and 23 ̴ 31 KN/mm² (at 70°C).
The correlation between curing temperature and rate of development of the flexural modulus of elasticity was not general.
The effect of post-curing on the flexural modulus of elasticity, after this had stabilized, has been investigated.
Post-curing at higher temperatures for 24 hours has not been found to have the same effect as curing entirely at the same temperature.
Generally, the flexural modulus of elasticity increased up to a certain post-curing temperature after which it decreased.
This has been attributed to a partial loss of bond between matrix and aggregate.
The effect of applied stress and that of age at first loading on creep in flexure has been examined on one of the E.R. mortars (Screed.G).
The creep increases with the increase of stress level ranging between 1/3 and 2/3.
The effect of age at first loading was noticeable only between 1 and 5 days.
At any applied stress and any age at first loading investigated, the creep showed primary, secondary and tertiary stage followed by failure of the specimens.
No general correlation has been observed between the creep coeffocoent and stress level.
Various cases of failure have been reported, where E.R. mortars screeds were applied on inadequately prepared P.C. concrete surfaces.
Due to the weak or inexistent bond between the topping and the substrate, any excess in linear expansion would cause instability failure of the topping.
Also, the case, where the substrate surface has been adequately prepared but possess geometrical imperfections, has been considered.
From a theoretical approach, the critical value of the linear expansion strain, likely to cause failure, is derived.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire Ms00985 Ms00985 Papier Bibliothèque centrale Mémoire de Master Disponible
Titre : The prevention and control of marine pollution Type de document : texte imprimé Auteurs : Tewfik Larbi Brahimi, Auteur ; R. Barratt, Directeur de thèse Editeur : Birmingham : University of Aston Année de publication : 1984 Importance : 78 f. Présentation : ill. Format : 30 cm. Note générale : Mémoire de Master : Environmental and Occupational Health : Birmingham, University of Aston : 1984
Bibliogr. f. 79 - 83 . Annexe f. 84 - 118Langues : Anglais (eng) Mots-clés : Marine pollution
Polluants
Waste treatment techniques
Sea disposalIndex. décimale : Ms00584 Résumé : In this present work, the various parameters related to the marine environment i.e. aquatic ecosystem, biodegradation, the biological oxygen demand and the effects of classes of pollutants on the marine environment are described.
The main prevention and control measures in the field of marine pollution are reviewed and their limitations considered.
These measures fall into three categories:
a/ Legislation: International conventions.
b/ The assessment of the behaviour of pollutants in the marine environment, using mathematical models.
c/ Use of waste treatment techniques and disposal methods other than sea disposal.
It is recognised that the prevention of marine pollution, from ship-based sources, is best dealt with at the global level whereas land-based sources and dumping operations in shallow seas are best dealt with at the Regional and ultimately the National level.
However, the implementation and enforcement of the provisions and regulations laid down in various international conventions, are still problems that need to be overcome.
The accuracy of the mathematical models used for the assessment of the transportation and distribution of pollutants once discharged at sea could be questioned since various factors, such as currents, salinity, temperature and tides vary in scale and with time.
Thus, the need for monitoring the marine environment is necessary where discharges occur i.e. estuarine and coastal waters.
The industry should be encouraged to have on-site waste treatment facilities in order to reduce the pollution load of their discharges.
Ideally industry should consider the control of the content of effluents at the design of the process that would be used.
Finally, a better understanding of the marine environment and the effects of pollutants on marine organisms would allow for the setting of standards that could be met in qualitative and quantitive terms.The prevention and control of marine pollution [texte imprimé] / Tewfik Larbi Brahimi, Auteur ; R. Barratt, Directeur de thèse . - Birmingham (Birmingham) : University of Aston, 1984 . - 78 f. : ill. ; 30 cm.
Mémoire de Master : Environmental and Occupational Health : Birmingham, University of Aston : 1984
Bibliogr. f. 79 - 83 . Annexe f. 84 - 118
Langues : Anglais (eng)
Mots-clés : Marine pollution
Polluants
Waste treatment techniques
Sea disposalIndex. décimale : Ms00584 Résumé : In this present work, the various parameters related to the marine environment i.e. aquatic ecosystem, biodegradation, the biological oxygen demand and the effects of classes of pollutants on the marine environment are described.
The main prevention and control measures in the field of marine pollution are reviewed and their limitations considered.
These measures fall into three categories:
a/ Legislation: International conventions.
b/ The assessment of the behaviour of pollutants in the marine environment, using mathematical models.
c/ Use of waste treatment techniques and disposal methods other than sea disposal.
It is recognised that the prevention of marine pollution, from ship-based sources, is best dealt with at the global level whereas land-based sources and dumping operations in shallow seas are best dealt with at the Regional and ultimately the National level.
However, the implementation and enforcement of the provisions and regulations laid down in various international conventions, are still problems that need to be overcome.
The accuracy of the mathematical models used for the assessment of the transportation and distribution of pollutants once discharged at sea could be questioned since various factors, such as currents, salinity, temperature and tides vary in scale and with time.
Thus, the need for monitoring the marine environment is necessary where discharges occur i.e. estuarine and coastal waters.
The industry should be encouraged to have on-site waste treatment facilities in order to reduce the pollution load of their discharges.
Ideally industry should consider the control of the content of effluents at the design of the process that would be used.
Finally, a better understanding of the marine environment and the effects of pollutants on marine organisms would allow for the setting of standards that could be met in qualitative and quantitive terms.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire Ms00584 Ms00584 Papier Bibliothèque centrale Mémoire de Master Disponible Documents numériques
BRAHIMI.Tewfik-Larbi.pdfURL
Titre : The quantum computer : a brief description Type de document : texte imprimé Auteurs : Djamal Chaib, Auteur ; Mourad Adnane, Directeur de thèse Editeur : [S.l.] : [s.n.] Année de publication : 2017 Importance : 23 f. Présentation : ill. Format : 30 cm. Accompagnement : 1 CD-ROM. Note générale : Mémoire de Master : Electronique : Alger, Ecole Nationale Polytechnique : 2017
Bibliogr. f. 23Langues : Anglais (eng) Mots-clés : Quantum-mechanics
Entanglement
Qubit
SuperpositionIndex. décimale : Ms13717 Résumé : Quantum computing studies computation systems that make direct use of quantum-mechanical phenomena, such as superposition and entanglement, to perform operations on data.
Quantum computers are different from binary digital electronic computers based on transistors.The quantum computer : a brief description [texte imprimé] / Djamal Chaib, Auteur ; Mourad Adnane, Directeur de thèse . - [S.l.] : [s.n.], 2017 . - 23 f. : ill. ; 30 cm. + 1 CD-ROM.
Mémoire de Master : Electronique : Alger, Ecole Nationale Polytechnique : 2017
Bibliogr. f. 23
Langues : Anglais (eng)
Mots-clés : Quantum-mechanics
Entanglement
Qubit
SuperpositionIndex. décimale : Ms13717 Résumé : Quantum computing studies computation systems that make direct use of quantum-mechanical phenomena, such as superposition and entanglement, to perform operations on data.
Quantum computers are different from binary digital electronic computers based on transistors.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire S000192 Ms13717 Papier Bibliothèque centrale Mémoire de Master Disponible Electronique En bon état Documents numériques
CHAIB_Djamel.pdfURL The use of micro-computers into small businesses / Tidjani Berregui
Titre : The use of micro-computers into small businesses Type de document : texte imprimé Auteurs : Tidjani Berregui, Auteur ; Ian Graham, Directeur de thèse Editeur : Ecosse : Heriot-Watt University Année de publication : 1985 Importance : 183 f. Présentation : ill. Format : 30 cm. Note générale : Mémoire de Master : Génie Industriel : Ecosse, Heriot-Watt University : 1985
Bibliogr. [11] fLangues : Anglais (eng) Mots-clés : Micro-computers
Small businesses
Hardware
SoftwareIndex. décimale : Ms01185 Résumé : In the space of no more than a decade, the micro-computer has been through much the same pattern of evolution as the mainframe computer took forty years to accomplish.
Progress in micro-computing has so far been exceedingly rapid and haphazard.
Hence, the attention of the world is now directed at new products and emergent technologies, such as the new micro-computers that are launched each month and for which growth expectations are extremely high.
The use of computers has been spreading rapidly since the Mid-60s.
Recently, the availability of micro-computers at prices which even the smallest business can contemplate, has led to a sudden acceleration in the rate of adoption of computer applications.
For many existing small businesses, it is the micro-revolution which could be of most help.
Thus, the choice is made and the rapid pace of technology has led, in some areas, to rapid absolescence, and in all areas to falling prices for a given level of power.
The present study is about the use of micro-computers into small businesses, its purpose is to provide a basis on which a small businessman can build a successful micro-computer implementation process.
The research is also of value in that there is relatively little published academic or commercial research in the area.
The main problem encountered during the research was the lack of research texts about the subject.
Information, therefore, has had to be collected from a great deal of articles available in various computer magazines, newspapers, reviews and other sources.
To carry out the study, both desk and field research were used.
The former consisted of collecting data from books, magazines, periodicals, reviews and newspapers; while the latter consisted of survey using a questionnaire distributed to a sample of small businesses in Scotland.
The dissertation begins by describing the main computers development from the first computer to the introduction of the micro-computers.
It also outlines the major difficulties faced by most writers in giving an exact definition to small business and the various yardsticks by which small businesses are measured.
The major hardware components that make up a micro-computer, system and the software that makes the micro-computer system perform its variousdifferent tasks, are discussed in some detail.
A discussion of how a small business might go about establishing a computer system is also provided.
The different types of suppliers and some of the typical hardware and software items available in the market are presented along with a discussion of how well the market satisfies the different users' needs.
Research methodology with general background about the methodological perspectives and the method used in carrying out the present research, is discussed, including the formation of the questionnaire, the sample process, objectives of the survey, etc.
A discussion of the data gathered from the survey is provided.
Lastly, opportunities for further research are briefly discussed.The use of micro-computers into small businesses [texte imprimé] / Tidjani Berregui, Auteur ; Ian Graham, Directeur de thèse . - Ecosse : Heriot-Watt University, 1985 . - 183 f. : ill. ; 30 cm.
Mémoire de Master : Génie Industriel : Ecosse, Heriot-Watt University : 1985
Bibliogr. [11] f
Langues : Anglais (eng)
Mots-clés : Micro-computers
Small businesses
Hardware
SoftwareIndex. décimale : Ms01185 Résumé : In the space of no more than a decade, the micro-computer has been through much the same pattern of evolution as the mainframe computer took forty years to accomplish.
Progress in micro-computing has so far been exceedingly rapid and haphazard.
Hence, the attention of the world is now directed at new products and emergent technologies, such as the new micro-computers that are launched each month and for which growth expectations are extremely high.
The use of computers has been spreading rapidly since the Mid-60s.
Recently, the availability of micro-computers at prices which even the smallest business can contemplate, has led to a sudden acceleration in the rate of adoption of computer applications.
For many existing small businesses, it is the micro-revolution which could be of most help.
Thus, the choice is made and the rapid pace of technology has led, in some areas, to rapid absolescence, and in all areas to falling prices for a given level of power.
The present study is about the use of micro-computers into small businesses, its purpose is to provide a basis on which a small businessman can build a successful micro-computer implementation process.
The research is also of value in that there is relatively little published academic or commercial research in the area.
The main problem encountered during the research was the lack of research texts about the subject.
Information, therefore, has had to be collected from a great deal of articles available in various computer magazines, newspapers, reviews and other sources.
To carry out the study, both desk and field research were used.
The former consisted of collecting data from books, magazines, periodicals, reviews and newspapers; while the latter consisted of survey using a questionnaire distributed to a sample of small businesses in Scotland.
The dissertation begins by describing the main computers development from the first computer to the introduction of the micro-computers.
It also outlines the major difficulties faced by most writers in giving an exact definition to small business and the various yardsticks by which small businesses are measured.
The major hardware components that make up a micro-computer, system and the software that makes the micro-computer system perform its variousdifferent tasks, are discussed in some detail.
A discussion of how a small business might go about establishing a computer system is also provided.
The different types of suppliers and some of the typical hardware and software items available in the market are presented along with a discussion of how well the market satisfies the different users' needs.
Research methodology with general background about the methodological perspectives and the method used in carrying out the present research, is discussed, including the formation of the questionnaire, the sample process, objectives of the survey, etc.
A discussion of the data gathered from the survey is provided.
Lastly, opportunities for further research are briefly discussed.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire Ms01185 Ms01185 Papier Bibliothèque centrale Mémoire de Master Disponible Theoretical and experimental evaluation of the control requirements of a R-RIM equipment / Abdelkader Attou
Titre : Theoretical and experimental evaluation of the control requirements of a R-RIM equipment Type de document : texte imprimé Auteurs : Abdelkader Attou, Auteur ; A. F. Johnson, Directeur de thèse Editeur : Bradford : University of Bradford Année de publication : 1982 Importance : 63 f. Présentation : ill. Format : 30 cm. Note générale : Mémoire de Master : Control Engineering : Royaume-Uni, University of Bradford : 1988
Annexe f. 64 - 136 . Bibliogr. f. 137 - 138Langues : Anglais (eng) Mots-clés : R-RIM equipment
Electrohydraulic valves
Electronic equipment
Computer controlIndex. décimale : Ms00282 Résumé : The project aimed at establishing the dynamic characteristics of a recently constructed R-RIM equipment.
The system comprises two hydraulic actuators working in parallel, their strokes being controlled by electrohydraulic valves and associated electronic equipment forming simple position control loops.
The whole system has to be identified.
Dynamic data were essential in order to make possible the design and implementation of computer control.
To achieve the aims two approaches were used:
- Analytical, in which the dynamic information were to be obtained from model equations representing energy, force and mass balance of the machine.
- Experimental, in which the process characteristics were to be determined directly from reaction curves representing the process response to a pre-measured disturbance.Theoretical and experimental evaluation of the control requirements of a R-RIM equipment [texte imprimé] / Abdelkader Attou, Auteur ; A. F. Johnson, Directeur de thèse . - Bradford : University of Bradford, 1982 . - 63 f. : ill. ; 30 cm.
Mémoire de Master : Control Engineering : Royaume-Uni, University of Bradford : 1988
Annexe f. 64 - 136 . Bibliogr. f. 137 - 138
Langues : Anglais (eng)
Mots-clés : R-RIM equipment
Electrohydraulic valves
Electronic equipment
Computer controlIndex. décimale : Ms00282 Résumé : The project aimed at establishing the dynamic characteristics of a recently constructed R-RIM equipment.
The system comprises two hydraulic actuators working in parallel, their strokes being controlled by electrohydraulic valves and associated electronic equipment forming simple position control loops.
The whole system has to be identified.
Dynamic data were essential in order to make possible the design and implementation of computer control.
To achieve the aims two approaches were used:
- Analytical, in which the dynamic information were to be obtained from model equations representing energy, force and mass balance of the machine.
- Experimental, in which the process characteristics were to be determined directly from reaction curves representing the process response to a pre-measured disturbance.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire Ms00282 Ms00282 Papier Bibliothèque centrale Mémoire de Master Disponible Documents numériques
ATTOU.Abdelkader.pdfURL
Titre : Theoretical study on Selective Harmonics Elemination SHE PWM Type de document : texte imprimé Auteurs : Anes Abderrahim Ouadria, Auteur ; Larbes, Chérif, Directeur de thèse Editeur : [S.l.] : [s.n.] Année de publication : 2017 Importance : 30 f. Présentation : ill. Format : 30 cm. Accompagnement : 1 CD-ROM. Note générale : Mémoire de Master : Electronique : Alger, Ecole Nationale Polytechnique : 2017
Bibliogr. f. 30Langues : Anglais (eng) Mots-clés : Motor speed
Inverter
PWM
Selective Harmonic Elimination (SHE)
Induction motorIndex. décimale : Ms14617 Résumé : Over the last years, many interests were given to the speed control of induction motor, thus so many researches has been made to develop technique and algorithm for a better control.
The inverters were proved the best controller of these machines.
They provide a PWM signal which is a succession of pulses, whose width is variable, and depends on the desired frequency spectrum.
The calculated Pulse Width Modulation technique with Selective Harmonic Elimination and Voltage Control (SHE PWM) is an attractive alternative for speed control of an induction motor.
This technique aim to calculate the switching angles, thus control the pulse width of the PWM signal to improve the efficiency of the motor and reduces the losses.Theoretical study on Selective Harmonics Elemination SHE PWM [texte imprimé] / Anes Abderrahim Ouadria, Auteur ; Larbes, Chérif, Directeur de thèse . - [S.l.] : [s.n.], 2017 . - 30 f. : ill. ; 30 cm. + 1 CD-ROM.
Mémoire de Master : Electronique : Alger, Ecole Nationale Polytechnique : 2017
Bibliogr. f. 30
Langues : Anglais (eng)
Mots-clés : Motor speed
Inverter
PWM
Selective Harmonic Elimination (SHE)
Induction motorIndex. décimale : Ms14617 Résumé : Over the last years, many interests were given to the speed control of induction motor, thus so many researches has been made to develop technique and algorithm for a better control.
The inverters were proved the best controller of these machines.
They provide a PWM signal which is a succession of pulses, whose width is variable, and depends on the desired frequency spectrum.
The calculated Pulse Width Modulation technique with Selective Harmonic Elimination and Voltage Control (SHE PWM) is an attractive alternative for speed control of an induction motor.
This technique aim to calculate the switching angles, thus control the pulse width of the PWM signal to improve the efficiency of the motor and reduces the losses.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire S000042 Ms14617 Papier Bibliothèque centrale Mémoire de Master Disponible Electronique En bon état Documents numériques
OUADRIA.Anes-Abderrahim.pdfURL
Titre : La thermographie infrarouge Type de document : texte imprimé Auteurs : Djameleddine Bellem, Auteur ; Mehenni, Mohamed, Directeur de thèse Editeur : [S.l.] : [s.n.] Année de publication : 2016 Importance : 44 f. Présentation : ill. Format : 30 cm. Accompagnement : 1 CD-ROM. Note générale : Mémoire de Master : Electronique : Alger, Ecole Nationale Polytechnique : 2016
Bibliogr. f. 45 - 46Langues : Français (fre) Mots-clés : Thermographie infrarouge
Température de surface
Rayonnement infrarouge
Caméra thermique
Traitement d’image infrarougeIndex. décimale : Ms12916 Résumé : Tout corps dont la température est supérieure à 0K émet un rayonnement infrarouge, il joue le rôle de source en transformant une partie de l’énergie thermique en énergie radiative, donc en rayonnement électromagnétique.
La thermographie infrarouge consiste à capter ce rayonnement, le quantifier afin de permettre la lecture des valeurs de température à distance, sans contact, de manière non destructive et sur des objets en fonctionnement.
Les images thermiques fournies par la caméra infrarouge sont caractérisées par la présence d’erreurs radiométriques, d’un fort bruit aléatoire et de faibles contrastes thermiques qui nécessitent alors un traitement approprié.
Dans ce contexte, nous avons pris à titre d’exemple un système de refroidissement pour éliminer l’effet du bruit thermique.
Il est ensuite montré comment utiliser efficacement les informations contenues dans ces images infrarouges.La thermographie infrarouge [texte imprimé] / Djameleddine Bellem, Auteur ; Mehenni, Mohamed, Directeur de thèse . - [S.l.] : [s.n.], 2016 . - 44 f. : ill. ; 30 cm. + 1 CD-ROM.
Mémoire de Master : Electronique : Alger, Ecole Nationale Polytechnique : 2016
Bibliogr. f. 45 - 46
Langues : Français (fre)
Mots-clés : Thermographie infrarouge
Température de surface
Rayonnement infrarouge
Caméra thermique
Traitement d’image infrarougeIndex. décimale : Ms12916 Résumé : Tout corps dont la température est supérieure à 0K émet un rayonnement infrarouge, il joue le rôle de source en transformant une partie de l’énergie thermique en énergie radiative, donc en rayonnement électromagnétique.
La thermographie infrarouge consiste à capter ce rayonnement, le quantifier afin de permettre la lecture des valeurs de température à distance, sans contact, de manière non destructive et sur des objets en fonctionnement.
Les images thermiques fournies par la caméra infrarouge sont caractérisées par la présence d’erreurs radiométriques, d’un fort bruit aléatoire et de faibles contrastes thermiques qui nécessitent alors un traitement approprié.
Dans ce contexte, nous avons pris à titre d’exemple un système de refroidissement pour éliminer l’effet du bruit thermique.
Il est ensuite montré comment utiliser efficacement les informations contenues dans ces images infrarouges.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire Ms12916 Ms12916 Papier Bibliothèque centrale Mémoire de Master Disponible Documents numériques
BELLEM.Djamel Eddine.pdfURL Thermostabilization of enzymes / Abderrahmane Baghiani
Titre : Thermostabilization of enzymes Type de document : texte imprimé Auteurs : Abderrahmane Baghiani, Auteur ; M.V. Park, Directeur de thèse Editeur : Edinburg [Scotland] : [s.n.] Année de publication : 1987 Importance : 131 f. Présentation : ill. Format : 29 cm. Note générale : Master of science : Biological Sciences : Edinburgh, Heriot-watt university : 1987
Bibliogr. f. 123 - 131Langues : Anglais (eng) Mots-clés : Thermostabilization
EnzymesIndex. décimale : Ms00887 Résumé : Lactate dehydrogenase from rabbit muscle was reacted with a homologous series of dicarboxylic acids of structure HOOC-(CH2)n-COOH, With 0≤ n ≤ 4 under conditions favouring cross-linking via enzyme amino-groups.
Maximal stabilization was observed in the case of succinate (4C atoms).
The data from SDS-polyacrylamide gel electrophoresis indicate only one band corresponding to the monomeric subunit of the enzyme, suggesting the absence of intersubunit cross-linkages.Thermostabilization of enzymes [texte imprimé] / Abderrahmane Baghiani, Auteur ; M.V. Park, Directeur de thèse . - Edinburg (Scotland) : [s.n.], 1987 . - 131 f. : ill. ; 29 cm.
Master of science : Biological Sciences : Edinburgh, Heriot-watt university : 1987
Bibliogr. f. 123 - 131
Langues : Anglais (eng)
Mots-clés : Thermostabilization
EnzymesIndex. décimale : Ms00887 Résumé : Lactate dehydrogenase from rabbit muscle was reacted with a homologous series of dicarboxylic acids of structure HOOC-(CH2)n-COOH, With 0≤ n ≤ 4 under conditions favouring cross-linking via enzyme amino-groups.
Maximal stabilization was observed in the case of succinate (4C atoms).
The data from SDS-polyacrylamide gel electrophoresis indicate only one band corresponding to the monomeric subunit of the enzyme, suggesting the absence of intersubunit cross-linkages.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire Ms00887 Ms00887 Papier Bibliothèque centrale Mémoire de Master Disponible Toriconical pressure vessels with thickness which varies piecewise linearly and stepwise / Ahmed Berras
Titre : Toriconical pressure vessels with thickness which varies piecewise linearly and stepwise Type de document : texte imprimé Auteurs : Ahmed Berras, Auteur ; T. E. Taylor, Directeur de thèse Editeur : Manchester : [s.n.] Année de publication : 1987 Importance : 32 f. Présentation : ill. Format : 30 cm. Note générale : Master of Science : Civil engineering : University of Manchester : 1987
Bibliogr. f. 33 - 35 . Annexe f. 36 - 96Langues : Anglais (eng) Mots-clés : Metallic cylindrical pressure
Thickness
Conical shells
Toroidal shellsIndex. décimale : Ms00687 Résumé : This dissertation reports on the effectiveness of reinforcing a thin metallic cylindrical pressure vessel with toriconical ends.
This, by increasing the thickness in the conical and toroidal shells.
The thickness is first increased in a stepwise fashion the values of dimensionless reinforced areas are compared with the ones required by BS5500 design rules.
Then an incomplete study of the possibility of increasing the thickness linearly is carried out.Toriconical pressure vessels with thickness which varies piecewise linearly and stepwise [texte imprimé] / Ahmed Berras, Auteur ; T. E. Taylor, Directeur de thèse . - Manchester : [s.n.], 1987 . - 32 f. : ill. ; 30 cm.
Master of Science : Civil engineering : University of Manchester : 1987
Bibliogr. f. 33 - 35 . Annexe f. 36 - 96
Langues : Anglais (eng)
Mots-clés : Metallic cylindrical pressure
Thickness
Conical shells
Toroidal shellsIndex. décimale : Ms00687 Résumé : This dissertation reports on the effectiveness of reinforcing a thin metallic cylindrical pressure vessel with toriconical ends.
This, by increasing the thickness in the conical and toroidal shells.
The thickness is first increased in a stepwise fashion the values of dimensionless reinforced areas are compared with the ones required by BS5500 design rules.
Then an incomplete study of the possibility of increasing the thickness linearly is carried out.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire Ms00687 Ms00687 Papier Bibliothèque centrale Mémoire de Master Disponible