In this paper, we introduce a novel hybrid multiuser multiple-input multiple-output (MU-MIMO) architecture, with an emphasis on aggressive millimeter-wave (mmWave) hardware reduction methods, omitting the beam selection stage. We propose a simplification in a 28 GHz Rotman lens, where the number of beam-ports are reduced relative to the array ports resulting in the removal of a bank of RF switches

A widespread mafic sill and dyke unit (the Pedro Lessa suite) adjacent to the southeastern São Francisco (SF) craton (eastern South America) is dated as 940 ± 42 Ma, 912 ± 17 Ma, and 986 ± 64 Ma (based on combined ID-TIMS and LA-ICPMS analyses on baddeleyite grains) on the Santa Maria de Itabira gabbroic intrusion. These ages suggest membership in the previously defined ca. 920–900 Ma Large Igneou

There are still no accepted criteria for the selection of patients with nonpalpable testes for laparoscopy versus a primary surgical exploration. We here report our experience using routine laparoscopy in such patients. The aim was to determine whether laparoscopy should be the first operative intervention or follow an inguinal exploration. Included in the study were 61 boys with 69 nonpalpable te

An original one-puncture technique of performing laparoscopic gastrostomy is described. The implications are analysed. The results of five operations are presented and the advantages and limitations are discussed in the light of current available methods.

The human host defense peptide LL-37 possesses antimicrobial activity but also affects host cell function and viability. Mast cells are involved in innate immunity but no data have been presented on effects of LL-37 on human mast cell viability and export of nucleic acids. Here, we demonstrated by immunofluorescence microscopy that synthesized LL-37 was internalized by human LAD2 mast cells and de

As much as one-third of the dietary fibre intake in a normal Western diet originates from fruits and vegetables. Nutritional effects of dietary fibre can to a great extent be related to the physicochemical properties of the fibre, such as composition, solubility, viscosity, water-holding capacity and molecular weight. In fruits and vegetables the structure of the cell wall matrix (tertiary structuAs much as one-third of the dietary fibre intake in a normal Western diet originates from fruits and vegetables. Nutritional effects of dietary fibre can to a great extent be related to the physicochemical properties of the fibre, such as composition, solubility, viscosity, water-holding capacity and molecular weight. In fruits and vegetables the structure of the cell wall matrix (tertiary structu

his study is intended to demonstrate the significant shifts in DOM concentration with space and time within and across inland waters (lakes), which can be acquired by the analysis of DOM concentration using Sentinel-2A imagery. Using a remote sensing method (based on Sentinel-2A data) to evaluate DOM quantity or concentration in freshwater (lakes), optical properties shifts of CDOM of spatial and

In theory, the use of collateral in credit contracting should mitigate the information problems that are widely held to be the primary cause of credit rationing. However, direct empirical evidence of the link between collateral use and credit rationing is scant. This paper examines the relationship between collateral and credit rationing using survey data that provides clean measures of quantity a

Borehole thermal resistance is both an important design parameter and a key performance characteristic of a ground heat exchanger. Another quantity that is particularly important for ground heat exchangers is the internal thermal resistance between the heat exchanger pipes. Both these resistances can be calculated to a high degree of accuracy by means of the well-known multipole method. However, t

In an experimental model using the human appendix transplanted into the Rowett rat, the role of obstruction in the pathogenesis of acute appendicitis was studied. Nine animals were anaesthetized and underwent laparotomy. Normal human appendices, removed during routine surgery, were transplanted into the rats. The appendices were obstructed by a balloon catheter introduced through the open end. Pre

The objective is to systematically review the literature on economic evaluations of pharmacological treatments of dementia disorders. A systematic search of published economic evaluation studies in English was conducted using specified key words in relevant databased and websites. Data extracted included methods and empirical evidence (costs, effects, incremental cost-effectiveness ratio) and we a

Phthalate esters are suspected endocrine disruptors that are found in a wide range of applications. The aim of this study was to determine the excretion of urinary metabolites in 16 individuals after inhalation and/or dermal exposure to 100⁻300 µg/m³ of deuterium-labelled diethyl phthalate (D₄-DEP) and bis(2-ethylhexyl) phthalate (D₄-DEHP). Dermal exposure in this study represents a case with clea