THz packaging solution for low cost si-based 40 Gb/s wireless link system

This paper presents an innovative low-cost transmitter solution aimed at improving telecommunication networks capacities in order to support the massive data traffic growth. Sub-THz frequencies > 200 GHz are considered to target at least 40 Gb/s. The proposed transmitter consists of a Silicon Photonic integrated sub-THz source and an industrial antenna integrated in HDI organic packaging substrate. As these components were experimentally evaluated, a real-time error free wireless data transmission of 10 Gb/s was successfully achieved and an antenna gain of 5.5 dBi was measured in the broadside direction from 220 GHz to 240 GHz (8.7% relative bandwidth). With the addition of a low-cost dielectric lens, a gain of 17 dBi was reached.info:eu-repo/semantics/acceptedVersio

Exploration of sulphide minerals in difficult mountain-geological conditions (on the example of Talnakhskiy sulphide unit)

Mining-geological conditions of mineral field of Talnakhskiy Sulphide Unit are presented. Particularities of exploration systems of sulphide copper-nickel minerals of Oktyabrskiy and Talnakhskiy fields were reviewed

A Quantitative Analysis of an Orphaned Set of Chipped Stone Tools in an Archaeology Teaching Collection

College of Liberal Arts, Department of Anthropology, Sociology & CriminologyThis report is the result of a semester-long project in Archaeological Method and Theory (ANTH 4620) at the University of Minnesota Duluth (UMD). Carried out in the Fall of 2019 as the laboratory component of a class with mostly junior and senior level anthropology or history majors, the intent of the project was to teach students data collection, analysis, and dissemination through hands-on work.University of Minnesota's Undergraduate Research Opportunities Progra

Particle size analysis of concentrated phospholipid microemulsions: I. Total intensity light scattering

Water-in-oil phospholipid microemulsions prepared from a constant total surfactant/cosurfactant concentration of 25 wt% at four different lecithin/alcohol weight ratios (Km of 1∶1, 1.5∶1, 1.77∶1, and 1.94∶1) and containing water concentrations (or volume fractions) ranging from 2.0 to 26 wt% (or 0.04 to 0.26) have been examined at 298 K using total intensity light scattering. The data obtained were analysed using the hard-sphere model of Percus-Yevick, modified to account for the partitioning of the alcohol between the various phases. The light-scattering results showed that, regardless of the Km or the alcohol used, a minimum water concentration of at least 9 wt% was required for the formation of a microemulsion; although this value was reasonably constant for each of the alcohols investigated, there was a tendency for a slightly higher concentration of water to be required for microemulsion formation at higher Km values. Simple calculations suggested that a microemulsion was formed only when sufficient water was present to satisfy the hydration of both the phospholipid head groups and the hydroxyl groups of the cosurfactant associated with the droplet. At water concentrations lower than this minimum value, a cosolvent system was observed. In all systems above this minimum concentration, as the concentration of water increased, the size of the microemulsion droplets also increased. Surprisingly, however, there was little difference in the size of the microemulsion droplets obtained with the different alcohols, regardless of the Km, although for a particular alcohol there was some indication that the higher Km systems produced the slightly smaller droplets for an equivalent water concentration. There was also a suggestion that the more hydrophobic alcohols produced slightly smaller droplets than the more polar alcohols at the same Km