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Ingeniero Civil / El presente trabajo tiene como objetivo determinar el desempeño sísmico de marcos de momento con conexión viga-columna doble t soldadas. Para ello, se implementa la metodología presentada en FEMA p695, la cual permite cuantificar el desempeño sísmico de nuevos sistemas estructurales. Para implementar la metodología, se requiere determinar de forma explícita las curvas de carga vs deformación de todos los elementos estructurales que componen el sistema sismo-resistente. Para las vigas y columnas se emplean las curvas presentadas en FEMA-356, mientras que para determinar la curva de la conexión viga-columna, se utiliza el modelo de rigidez desarrollado por Swanson, 2000. Los resultados indican que un marco de momento con conexiones doble-t soldadas solo puede considerarse como marcos especiales (SMF) si el tamaño de sus vigas es de perfiles IN70 o inferior. Para marcos que requieran vigas de mayor dimensión, se deben considerar como marcos ordinarios (OMF), con el factor de reducción menor correspondiente. Este resultado ratifica lo expuesto en FEMA-350, donde se precalifica la conexión t-stub plegada para ser usada como SMF solo hasta perfiles tamaño W24.

This thesis describes the constructions of draper headers for combine (adapters), their main parts and mode of transport. The main focus is on three MacDon's draper headers. The main aim of the thesis is to evaluate and compare MacDon harvesting adapters in operating conditions. The partial aim of this thesis is the evaluation of the exploitation indicators and analysis of investment and operating costs. This thesis is focused on the construction and changes in construction of MacDon draper headers, the selected types of drape headers for combine are compared, the performance and the exploitation indicators are evaluated, and the analysis of investmen and operating costs. For evaluate and compare several types of draper headers i´ts used the method of assessing the losses caused by the draper adapter and the stubble height estimation method.

Offentliga uppköpserbjudanden på den svenska aktiemarknaden sker främst med kontantvederlag, ofta förenat med aktievederlag. Som alternativ till sådant vederlag kan budgivaren erbjuda målbolagets aktieägare ”stub equity” med vilket avses det fall budgivaren erbjuder målbolagets aktieägare en begränsad mängd aktier i ett särskilt onoterat holding- eller budbolag, vilket i sin tur efter det offentliga uppköpserbjudandet innehar samtliga aktier i målbolaget. Syftet med denna uppsats är att utreda hur ett sådant erbjudande måste utformas för att vara förenligt med Takeover-reglerna, då i synnerhet den aktiemarknadsrättsliga likabehandlingsprincipen. Det föreligger inga direkt aktiemarknadsrättsliga hinder för stub equity vid offentliga uppköpserbjudanden, förfarandets förenlighet med regleringen är helt beroende av hur erbjudandet utformas och vilka syften erbjudandet avser uppnå. Möjligheterna att särbehandla målbolagets aktieägare är till följd av likabehandlingsprincipen i regel mycket små. Ett erbjudande med stub equity torde kunna utformas så att mindre aktieägare erbjuds ett kontantvederlag alternativt ett aktievederlag i holding- eller budbolaget medan de större aktieägarna enbart erhåller ett aktievederlag i holding- eller budbolaget, då mot bakgrund av de praktiska skäl som finns till stöd för en sådan utformning. Budgivaren har därutöver vid ett erbjudande med stub equity möjligheten att erbjuda målbolagets aktieägare A-aktier i budbolaget i utbyte mot A-aktier i målbolaget, B-aktier i budbolaget i utbyte mot B-aktier i målbolaget samt en premie för aktier med olika ekonomiska rättigheter. Ett stub equity-erbjudande ställer därutöver krav på erbjudandehandlingens utformning, innefattande att ett värderingsutlåtande avseende värderingen av aktievederlaget bör inhämtas och bifogas samt att målbolagets aktieägare bör informeras om upplägget i erbjudandehandlingen på ett tydligt och lättbegripligt sätt. Vidare torde villkor om viss anslutandegrad för stub equity-delen av vederlaget, villkor om att aktievederlaget med stub equity begränsas samt villkor om att vissa aktieägare ska acceptera erbjudandet vara förenligt med likabehandlingsprincipen. Gällande reglering torde slutligen innebära ett erforderligt skydd för okvalificerade investerare vid erbjudanden om stub equity, detta då möjligheterna att särbehandla aktieägare till följd av likabehandlingsprincipen är mycket begränsade och skyldigheterna att informera okvalificerade investerare om innebörden av ett erbjudande med stub equity betydande. / Public takeover bids on the Swedish stock market are mainly made with cash considerations, frequently combined with share considerations. As an alternative to such public offerings, the bidder may offer the company's shareholders “stub equity”, in which case the bidder offers the target company's shareholders a limited number of shares in a special unlisted holding or bidding company, which in turn after the public takeover bid holds all shares in the target company. This thesis seeks to discuss how such an offer needs to be designed in order to be compatible with the Swedish takeover regulation, in particular the principle of equal treatment of shareholders. There are no direct restrictions to stub equity in public takeover bids in the Swedish takeover regulation, the procedure's compatibility with the regulation is entirely dependent on how the offer is designed and what purposes the offer is intended to achieve. The opportunity to treat the target company's shareholders differently are generally very limited due to the principle of equal treatment. An offer with stub equity ought to be able to be designed so that smaller shareholders are offered a cash consideration or a share consideration in the holding or bidding company, whilst the larger shareholders only receive a share consideration in the holding or bidding company. This in accordance with the exception for practical reasons the Swedish takeover regulation permits in these cases. In addition to this, in an offer with stub equity, the bidder has the opportunity to offer the target company's shareholders A-shares in in the holding- or bid company in exchange for A-shares in the target company, B-shares in the holding- or bid company in exchange for B-shares in the target company as well as a premium for shares with different financial rights. Furthermore, an offer with stub equity places high demands on the design and content of the offer document, including obtaining a valuation statement regarding the valuation of the share consideration and informing the target company's shareholders about the structure of the offer document in a clear and easy to understand manner. Conditions regarding certain degree of accession to the stub equity part of the offer, conditions that the share consideration with stub equity is limited and conditions that certain shareholders must accept the offer ought to also be compatible with the Swedish takeover regulation. Lastly, the existing regulation ought to entail the necessary protection for unqualified investors when offering stub equity, as the opportunity to treat shareholders differently due to the principle of equal treatment is very limited and the obligations to inform unqualified investors about the meaning of an offer with stub equity are significant.

ABSTRACT An evaluation of glass reinforced plastic pipe stub-flange behaviour during hydrostatic pressure testing is presented. Similar flanges made according to different manufacturing methods were analysed. Linear static analysis using MSC Patran / Nastran was performed to predict the critically loaded regions subjected to high stress concentrations. These regions were used for experimental strain gauge locations. Hydrostatic testing designed according to BS 5480 and ASTM F 37 was performed on assembled flange joints to initiate both leakage and ultimate material failure. Experimental strain results were compared to finite element numerical results at the selected locations. Fibre dominated failure characterised by cracks extending through the stub and matrix dominated failure characterised by interlaminar debonding were noticed. The need for further work analyzing GRP flanges subject to mechanical load and taking into account induced residual thermal stress effects is suggested.

The master's thesis deals with the design and implementation of a reconfigurable patch antenna. The antenna is fed by a microstrip transmission line. To the microstrip feeder, tuning stubs are connected. Each stub matches the input impedance of the antenna to 50 ? for different operation frequencies. Stubs can be individually connected to the feeder by PIN diodes; operation frequency of the antenna can be switched that way. In the project, the antenna is initially designed for antenna substrate RO3006. Then, the design will be converted to the substrate ARLON AD600 selected for the realization. In the project, modifications of stubs will be proposed to properly connect the PIN diodes. Functionality of the designed antenna will be verified by modeling in Ansoft Designer. The last part will be dealt with implementation of the antenna and the experimental measurement of their properties.

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This paper is an attempt to study the behavior of axially loaded concrete filled steel tubular (CFST) stub columns with special-shaped cross-sections, i.e. triangular, fan-shaped, D-shaped, 1/4 circular and semi-circular. A total of forty-four specimens including CFST stub columns and reference hollow steel tubular stub columns were tested. The effects of the changing steel tube wall thickness and the infill of concrete on the behavior of the composite columns were investigated. The results showed that the tested special-shaped CFST stub columns behaved in a ductile manner, and the composite columns showed an outward local buckling model near the middle section. Generally, the failure modes of these five kinds of special-shaped specimens were similar to those of the square CFST stub columns. Finally, simplified model for predicting the cross-sectional strength of the special-shaped CFST sections was discussed and proposed.

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