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Introduction: Mammography is one of the most common X-ray examinations although it is well-known that the anatomical background of the breast is the main obstacle when it comes to detection of breast lesions with this method. Tomosynthesis is a three-dimensional radiographic technique which, to a large extent, can suppress the confounding effect of the anatomical background. Tomosynthesis is a str

South Africa is a mineral-rich country and one area in which minerals can be very important is catalysis. Over an extended period of time, homogeneous catalysis has grown to become very useful, particularly in the chemical and pharmaceutical industries. The organometallic compounds required in the catalysis industry have advanced from metallocenes to an alternative in the form of α-diimines. Most

Purpose - To offer knowledge about the global development of largescale demand responsive transport systems (DRT), and to stimulate dialogue and collaboration for further innovation and improvement of these systems. Design/methodology/approach - A review of the literature shows how DRT has evolved from the first applications in the 1970s to very complex operations in the last two decades with hund

We present a real-time digital predistortion (DPD) and RF power amplifier (PA) development platform with separate synchronous and coherent RF channels to evaluate multi-input RF PAs with realistic modulated test signals. The platform is based on a Xilinx FPGA and wideband analog frontends to support signal bandwidths up to 312.5 MHz. We describe both the implemented hardware as e.g. DPD core and d

In patients unsuitable for standard, infrarenal endovascular aneurysm repair (EVAR) due to an inadequate or inappropriate infrarenal neck, various options have been proposed to achieve a suitable endovascular repair. The primary objective in this setting is to move the endograft sealing zone to a healthier, more cranial segment of the aorta. The need for a solution for problematic proximal neck an

The robust Capon beamformer has been shown to alleviate the problem of signal cancellation resulting from steering vector errors, caused, e.g., by calibration and/or angle- of-arrival errors, which would otherwise seriously deteriorate the performance of an adaptive beamformer. Here, we examine robust Capon beamforming of multi-dimensional arrays, where robustness to angle-of-arrival errors is nee

We examine consumer certainty of future preferences and overconfidence in predicting future preferences. We explore how preference certainty and overconfidence impact the option value to revise today's decisions in the future. We design a laboratory experiment that creates a controlled choice environment, in which a subject's choice set (over food snacks) is known and constant over time, and the t

Complex formation between [Pd(H2O)(4)](2+) and oxalate (ox = C2O42-) has been studied spectrophotometrically in aqueous solution at variable temperature, ionic strength and pH. Thermodynamic parameters at 298.2 K and 1.00 mol dm(-3) HCIO4 ionic medium for the complex formation [Pd(H2O)(4)](2+) + H(2)ox (sic) Pd(H2O)(2)(ox)] + 2H(3)O(+) with equilibrium constant K-1H (in mol dm(-3)) are logio K-1,K

PowerPoint-presentation ANVÄNDARTESTNING VID LULEÅ UB Ola Andersson Luleå universitetsbibliotek 2017-11-08 ANVÄNDARTESTNING UPPSTART  Olika metoder för att testa användbarheten – Expertutvärdering -En utvärdering som utförs av ett antal experter inom området. De går enskilt igenom webbplatsen för att senare diskutera resultaten med de andra utvärderarna. – Användartestning -Faktiska användare får

https://www.ub.lu.se/sites/ub.lu.se/files/ola_andersson_anvandartestning_vid_lulea_ub.pdf - 2026-07-25

Conventional surveillance systems are omnipresent and most are still based on analog techniques. Migrating to the digital domain grants access to the world of digital image processing enabling automation of such systems, which means extracting information from the image stream without human interaction. The resolution, frame rates, and functionality in these systems are continuously increasing alo

Program parallelization and distribution becomes increasingly important when new multi-core architectures and cheaper cluster technology provide ways to improve performance. Using declarative languages, such as constraint programming, can make the transition to parallelism easier for the programmer. In this paper, we address parallel and distributed search in constraint programming (CP) by proposi