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Acoustic fatigue can occur in structural elements of an aircraft exposed to very high sound pressures. To deal with acoustic fatigue, mainly empirical methods have been applied and often late in the design phase. Current design guidelines have several limitations. First, they do not say anything about the load intensities. The load levels can be determined either experimentally or numerically. Exp

This paper presents the hardware realization of the factorization algorithm required in a MIMO OFDM receiver to make the detection and decoding a non-orthogonal space-time code. Requirements of a real scenario represented by the standard IEEE 802.11n for WLAN have been analyzed and exploited to draw out the specifications of the proposed implementation. A very high throughput hardware realization

BackgroundPostzygotic isolation in the form of reduced viability and/or fertility of hybrids may help maintain species boundaries in the face of interspecific gene flow. Past hybridization events between house sparrows (Passer domesticus) and Spanish sparrows (P. hispaniolensis) have given rise to a homoploid hybrid species, the Italian sparrow (P. italiae). Although genetic incompatibilities are

Purchasing on the part of a building construction company involves actors inside and outside the organization. These actors are driven by different motives that influence purchasing decisions in different situations. An explicit framework that assists in understanding the different purchasing situations would be of benefit to companies and researchers. Through a study of purchasing theory and pracPurchasing on the part of a building construction company involves actors inside and outside the organization. These actors are driven by different motives that influence purchasing decisions in different situations. An explicit framework that assists in understanding the different purchasing situations would be of benefit to companies and researchers. Through a study of purchasing theory and prac

The difficulty of predicting returns has recently motivated researchers to start looking for tests that are either more powerful or robust to more features of the data. Unfortunately, the way that these tests work typically involves trading robustness for power or vice versa. The current paper takes this as its starting point to develop a new panel-based approach to predictability that is both rob

The solution of generic dynamic optimization problems described by Modelica, and its extension Optimica, code using direct collocation methods is discussed. We start by providing a description of dynamic optimization problems in general and how to solve them by means of direct collocation. Next, an existing implementation of a collocation algorithm in JModelica.org, using CasADi and IPOPT, is pres

Popular Abstract in Swedish Denna avhandling undersöker förutsättningarna för att stoppa nedbrytning av benvävnad med hjälp av bifosfonater i några ortopediska problemsituationer. Bifosfonater är en relativt ny grupp av läkemedel som hämmar nedbrytning av benvävnad. De binder effektivt till benmineral och i praktiken förblir de inbundna i skelettet tills benmineralet upplöses. Bifosfonater finns iProsthetic loosening, bone graft resorption and osteonecrosis are examples of problems in orthopedic surgery caused by or augmented by bone resorption. Bone resorption is caused by osteoclasts. Osteoclasts can be inactivated with biphosphonates, a drug in clinical use against osteoporosis and osteolytic tumors. The bone resorption-reducing ability of bisphosphonates was analyzed in rat models. An

Popular Abstract in Swedish Analytisk kemi innefattar metoder för bestämning av den kemiska sammansättningen hos prover och ämnen. En kvalitativ metod ger information om den atomära eller molekylära sammansättningen medan en kvantitativ metod ger numeriska värden på hur mycket det finns av en eller flera av de komponenter som ingår i ett prov. En kombination av de båda metoderna är ofta önskvärd dAmperometric enzyme based biosensors were designed, developed and characterised in flow systems. Solid graphite and carbon paste electrodes were used as support for enzyme immobilisation. Both mediated and direct electron transfers between redox enzymes and electrodes were utilised for biosensor construction, as well as coupled enzyme systems. Special emphasis was placed on the optimisation of bio