Knowledge of the two-phase flow state is fundamental for two-phase flow system design and operation. In traditional two-phase flow studies, the flow regime refers to the physical location of the gas and liquid in a conduit. Flow configuration is important for engineering correlations of heat and mass transfer, pressure drop, and wall shear. However, it is somewhat subjective since it is mostly defined by experimental observation, resulting in an approximate and equivocal definition. Thus, there is need for a better, objective flow regime identification. The void fraction is a key parameter in monitoring the operating state of a two-phase system and several tools have been developed in order to measure it. The purpose of this study is to use the void fraction and other parameters of the system to achieve a model for flow pattern identification. Recently, an experimental program using the Foster-Miller two-phase flow test bed and Creare Inc. capacitance void fraction sensors was conducted in the microgravity environment of the NASA KC-135 aircraft. Several data types were taken for each phase, such as flow rate, superficial velocity, density and transient void fraction at 100Hz. Several analytical approaches were pursued, including a statistical approach of the fluctuation of the void fraction, Martinelli analysis, and Drift Flux analysis, in order to reach a model for flow pattern identification in microgravity conditions. Several parameters were found to be good flow pattern identifiers such as the statistical moments variance and skewness, Signal -to- noise ratio (SNR), Half Height Value (HHV) and Linear Area Difference (LAD). Moreover, relevant conclusions were achieved using the Martinelli parameter and the Drift Flux model in microgravity conditions. These results were compared with the basic literature.

The presence of moisture in hot mix asphalt (HMA) causes loss of strength and durability of the mix, which is referred to as moisture damage. This study deals with the development of experimental methods for measuring total suction in HMA, which can be defined as the free energy state of water in HMA mixes. The total suction is related to the ability of moisture to get into the mix under unsaturated conditions; it is also related to the ability of the mix to retain moisture. Soil suction has been studied extensively. However, suction in HMA as a porous material and its relationship to moisture damage have not been studied. The development of a procedure to measure the total suction in HMA mixes is the first objective of this research. The second objective is to relate suction measurements to physical and chemical properties of the mixtures. The objectives were achieved in two phases. In the first phase, the total suction was measured in HMA specimens with different types of aggregates (limestone and granite), and with different air void distributions and aggregate gradations. The results of this phase showed that the drying test using a 60 oC temperature-controlled room is the proper setup for measuring the total suction in HMA using thermocouple psychrometers. The characteristics of suction-moisture content curves were found to be related to the air void distribution in HMA. In the second phase, total suction was measured in sand asphalt specimens. These specimens had different combinations of aggregates and binders with different bond energies and exhibited different field performance in terms of resistance to moisture damage. The suction measurements in sand asphalt specimens were used to calculate the moisture diffusion coefficient. The results revealed that water diffused into sand asphalt specimens that are known to have poor resistance to moisture damage faster than those that are known to have good resistance to moisture damage

Santuokos pripažinimo negaliojančia institutas nėra naujas šiuolaikinės civilinės teisės kūrinys. Šis institutas pirmą kartą istoriniuose šaltiniuose paminėtas dar XVI amžiuje. Santuokos negaliojimo teisiniai pagrindai bei teisinės pasekmės reglamentuotos Lietuvos Respublikos civiliniame kodekse. Šiame darbe sisteminės analizės būdu atskleidžiama santuokos pripažinimo negaliojančia instituto esmė bei jo išskirtinumas. Šis institutas apibrėžiamas kaip pačios valstybės atsisakymas asmenų sudarytą santuoką pripažinti ir ginti, išreikštas teismo sprendimu. Lyginamuoju aspektu analizuojami skirtingų užsienio valstybių santuokos negaliojimo pagrindai, Lietuvoje pripažįstant ar nepripažįstant santuoką, turinčią užsienio elementą, negaliojančia. Didėjant mišrių santuokų skaičiui, daugėja ir santuokos negaliojimo atvejų. Šiame darbe nagrinėjamos tarptautinių konvencijų, tarptautinių sutarčių nuostatos, taikomos užsienio valstybių teismų sprendimų dėl santuokos pripažinimo negaliojančia. Ypatinga vieta skiriama ES teisei, o ypač – Briuselio IIbis reglamentui, kuriuo suvienodinama valstybių narių teismų sprendimų dėl santuokos pripažinimo negaliojančia procedūra. / The institute of marriage annulment is not new basis regarding the end of legal relations between spouses. Marriage annulment was first mentioned in Lithuanian historical sources in 16th century. The grounds and procedures for declaring Marriage Null and Void are provided in the Article 3.37 of the Civil Code of Lithuanian Republic. In this work by the help of systematic method there is developed the substance of marriage annulment and its distinguishing points extracting this institute from the others institutes declaring the end of legal relations between spouses. This institute is being determined as the rejection of the country to accept and guard the alliance of spouses and to acclaim such alliance as marriage. Different grounds of marriage annulment are being analysed by the help of comparative method. Marrying a foreigners and getting married in the foreign countries becomes more and more popular nowadays. But also with this, the institute of marriage annulment becomes more applicable in practice. In this work we analyse international conventions, agreements and other international documents regarding acknowledgement of the court ruling. The special place in this work is set for European Union Law concerning marriage annulment, especially the new Brussels II (Council Regulation (EC) No 2201/2003 on jurisdiction and the recognition and enforcement of judgments in matrimonial matters and in matters of parental responsibility for the children of both spouses).

Industrial metal forming operations generally require several deformation steps in order to create the final product. The mechanical behavior of materials undergoing strain path changes can be very different from those deformed in a given direction to fracture. The work presented here employed laser drilled model materials to better understand the effect of pre-strains and strain path changes on void growth and linkage leading to fracture is studied. The experimental results show that increasing pre-strain results in faster void growth which was justified in terms work hardening rate in the sample. Scanning electron microscope images revealed that the ductility of the sample decreased with increasing pre-strain but only slightly compared to the large decrease in far field strain at failure. This suggests that pre-strain affects strain localization significantly and to a lesser extent the ductility. Finally a finite element model has been built to predict the linkage between voids.

This thesis is concerned with the performance and measurement uncertainty of wire-mesh sensors in different air-water flow regimes in horizontal pipes. It also presents measurements of void fraction and interfacial velocity in such flows. It was found that the interfacial velocity measurements of the wire-mesh sensors were in good agreement with those taken with a high-speed camera and estimates of the uncertainties of these measurements are presented. Drift-flux models were fitted to the measurements and it was found that the parameters of these models were not only sensitive to the flow regime, but also to the liquid superficial velocity.

This thesis attempts to illuminate new approaches to the thought of Jean Baudrillard, by understanding his unique phenomenological approach and radical affirmation of experience. This will be considered through an exploration of some interesting distinctions between his work and Friedrich Nietzsche’s. Where Nietzsche attempts to fall out of exchange with the world, it will be found that Baudrillard’s work is attempting to enact a kind of tension with things. This aspect of Baudrillard’s work will be examined through some interesting connections to the later work of Maurice Merleau-Ponty, specifically through the concept of reversibility. These connections and distinctions will gather in some important insights on Baudrillard’s approach to the topics of void, the hyperreal and relationality. Moreover, through exploring the intricacies of his phenomenological approach, I hope to understand more clearly what it means to sink into appearances, and to locate the subject wholly within the tensions of relations and forces enigmatic to it. / Graduate

The two-phase gas/liquid flow phenomenon can be encountered over a range of gas and liquid flow rates in the chemical engineering industry, particularly in oil and gas production transportation pipelines. Monitoring and measurement of their characteristics, such as the gas void fraction, are necessary to minimise the disruption of downstream process facilities. Thus, over the last decade, the investigation, development and use of multiphase flow metering system have been a major focus for the industry worldwide. However, these meters suffer from several limitations in some flow conditions such as Slug flow regime. This research presents experimental results correlating Acoustic Emission measurements with Gas Void Fraction (GVF) in a two-phase air / water flow. A unique experimental facility was modified to accommodate an investigation into the applicability of the Acoustic Emission (AE) technology in monitoring two-phase gas\liquid flow. The testing facility allowed for investigations over a range of superficial liquid velocities (0.3 to 2.0 ms-1) and superficial gas velocities (0.2 to 1.4 ms-1). The influence of several variables such as temperature, viscosity and surface roughness were also investigated. Measurements of AE for varying gas void fractions were compared to conductive probe measurements and results showed a direct correlation between the AE energy and the gas void fraction. It is concluded that the GVF can be determined by measurement of Acoustic Emission and this forms the major contribution of this thesis.

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Industrial metal forming operations generally require several deformation steps in order to create the final product. The mechanical behavior of materials undergoing strain path changes can be very different from those deformed in a given direction to fracture. The work presented here employed laser drilled model materials to better understand the effect of pre-strains and strain path changes on void growth and linkage leading to fracture is studied. The experimental results show that increasing pre-strain results in faster void growth which was justified in terms work hardening rate in the sample. Scanning electron microscope images revealed that the ductility of the sample decreased with increasing pre-strain but only slightly compared to the large decrease in far field strain at failure. This suggests that pre-strain affects strain localization significantly and to a lesser extent the ductility. Finally a finite element model has been built to predict the linkage between voids.