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Massive multiple-input multiple-output (MIMO) arrays are becoming critical elements in cellular base station infrastructure. We utilize the theory of characteristic modes (TCM) to design a novel tri-modal broadside antenna element which is suitable for the construction of compact massive MIMOarrays. The proposed antenna element consists of three ports which is formed by reviewing an existing compa

Background: Pituitary adenylate cyclase-activating polypeptide (PACAP) occurs as either a 27- or 38-amino acid neuropeptide and belongs to the vasoactive intestinal polypeptide/glucagon/secretin family of peptides. PACAP and vasoactive intestinal polypeptide have a 68% homology of their amino acid sequences and share three B-type G-protein coupled receptors: VPAC1, VPAC2 and PAC1 receptors. Method

Objective: To assess the long-term results of elective abdominal aortic aneurysm (AAA) repair with a single stent graft system. Methods: Patients undergoing elective, infrarenal endovascular aneurysm repair (EVAR) with a single-stent graft system between 1998 and 2012 were analyzed retrospectively registering pre-, intra-, and postoperative data. All imaging was reviewed. Data are presented as med

The study describes the first glycoside hydrolase that exhibits comparable levels of activity on α- and β-linked saccharide substrates. This enzyme, assigned into GH109, is encoded by the genome of the human gut symbiont Akkermansia muciniphila that is a model primary degrader of the heavily O-glycosylated mucin glycoprotein that coats the epithelial enterocytes.The elusive catalytic acid/base cat

Light-to-electricity conversion processes in organic and dye sensitized solar cells have attracted much scientific effort, aiming to understand the fundamental nature of these processes and to improve solar cell efficiency. Power conversion efficiency of such solar cells has progressed steadily in the last few decades, suggesting applicability for commercial products in the nearest future. Yet, th

More than a century ago, the centrosome was discovered and described as “the true division organ of the cell”. Electron microscopy revealed that a centrosome is an amorphous structure or pericentriolar protein matrix that surrounds a pair of well-organized centrioles. Today, the importance of the centrosome as a microtubule-organizing center and coordinator of the mitotic spindle is questioned, be

Aim: Investigate the feasibility of identifying a well-defined treatment group and a comparable reference group in clinical register data. Background: There is insufficient knowledge on how to avert neck/back pain from turning chronic or to impair work ability. The Swedish Government implemented a national multimodal rehabilitation (MMR) programme in primary care intending to promote work ability,

Ambiguous figures, as described in visual perceptual psychology, are single pictures that contain several possible, mutually exclusive, motifs. Some specific cases of images in South Scandinavian Bronze Age rock art can be fruitfully analysed as ambiguous figures. Furthermore, we argue that these images represent some sort of narrativity, which needs to be understood in order to make a perceptual

In this paper we argue for a developmental perspective in language assessment of second language learning, and that there is a need for an assessment with clear and precise criteria for evaluating the grammatical levels. Processability Theory is suggested as a theoretical framework for a stage model that enables teachers to follow the second language development over time. We have tested this appr

Inkjet printing (IJP) has evolved over the past 30 years into a reliable, versatile, and cost-effective industrial production technology in many areas from graphics to printed electronic applications. Intensive research efforts have led to the successful development of functional electronic inks to realize printed circuit boards, sensors, lighting, actuators, energy storage, and power generation d

We report on the formation of wrinkle-patterned surface morphologies in cesium formamidinium-based CsxFA1-xPb(I1-yBry)3 perovskite compositions with x = 0-0.3 and y = 0-0.3 under various spin-coating conditions. By varying the Cs and Br contents, the perovskite precursor solution concentration and the spin-coating procedure, the occurrence and characteristics of the wrinkle-shaped morphology can b

The diffusion or transport lengths of photo-generated charge carriers in CH3NH3PbI3 layers (thickness up to 1 μm) and powders have been directly measured with high accuracy by modulated surface photovoltage after Goodman. The values of the diffusion lengths of photo-generated charge carriers ranged from 200 nm to tenths of μm. In thin CH3NH3PbI3 layers, the transport lengths corresponded to the la