Course instructors need to assess the efficacy of their teaching methods, but experiments in education are seldom politically, administratively, or ethically feasible. Quasi-experimental tools, on other hand, often problematic, as they typically too complicated be widespread use educators and may suffer from selection bias occurring due confounding variables such students’ prior knowledge. We developed a machine learning algorithm that accounts for Our is based symbolic regression uses...

Bending tests were conducted with cross laminated timber (CLT) panels made using an alternating layer arrangement.Boards of Norway spruce used to manufacture five-layer on industrial CLT production line.In total, 20 samples tested, consisting two configurations 10 each type: transverse layers at 45° and the conventional 90° arrangement.Sample dimensions 95 mm × 590 2000 mm.The tested by four point bending in main load-carrying direction a flatwise panel layup.The results indicated that...

Team-based learning (TBL) is a flipped classroom model, where small group discussions and peer play central role. Some of its features, such as scalability to large classes high degree structure, together with well documented success rate in other fields, could make TBL an attractive option for the mathematics educator wishing transform their teaching. This article surveys available peer-reviewed literature provide overview current use mathematics, summarizes findings based on these,...

Fluence modulation of multiple electron beams various energies has been used to optimize the delivered dose distribution during beam radiation therapy. By maximizing probability achieving tumor control without causing severe complications fluence profiles have optimized for superficial target volumes. It is possible use several equiportal fluence-modulated modify energy deposition with depth in a controlled manner making it technique as an alternative bolus. The was tested two representative...

HVDC cable technology with extruded insulation systems have been growing rapidly in the recent years. Different concepts including crosslinked or thermoplastic polymers without particle fillers studied intensively. The DC conduction is one of most important mechanism dielectric physics; therefore reliable and representative methods are needed to characterize it. In development process cables from small scale plaque sample experiments full testing, high field conductivity measurement space...

Wood is a pure, sustainable, renewable material.The increasing use of wood for construction can improve its sustainability.There are various techniques to assemble multi-layer wooden panels into prefabricated, load-bearing elements.However, comparative market and economy studies still scarce.In this study, the following assembling were compared: laminating, nailing, stapling, screwing, stress doweling, dovetailing, welding.The production costs, durability, ecological considerations...

A common issue in electric railway operation is the wear of pantograph contact strip. This especially pronounced with ice or rime frost on overhead line that causes arcing between strip and wire. To monitor it possible to utilise fact generates a DC component AC locomotive current. The paper presents method for condition based maintenance predicted by monitoring running distance as well evaluate method, measurements have been carried out Swedish Re during winter conditions. (6 pages)

CARABAS, an acronym for `coherent all radio band sensing,' is airborne, horizontal-polarization SAR operating across the frequency 20 to 90 MHz, conceived, designed and built by FOA in Sweden. The original motivation designing such a low system was that large relative or fractional bandwidth could be achieved at frequencies. For reasons explained, considered of potential benefit radar detection severe clutter environments. A feasibility study short wave ultra-wideband started 1985. Actual...

We study the scattering interaction of electromagnetic pulses short duration with a few targets. The targets are two spheres and cylinder made metal, they buried at selected depths in dry sand contained an indoor sandbox. backscattered echoes extracted by impulse radar system playing role ground penetrating (GPR). In general, multiple between target surface from discontinuities distort returned to extent that recognition means frequency signature is nearly impossible. These obstacles for...

This paper examines when it is possible to find a smooth potential on C1 domain D with prescribed normal derivatives at the boundary. It shown that this always Liapunov-Dini domain, and restriction essential. An application concerning superharmonic extension given.

Metal and nonmetal objects, buried to a selected depth in dry sand an indoor sandbox, are illuminated by impulse radar system playing the role of ground penetrating (GPR). The recorded time-series data backscattered echoes from these targets analyzed joint time-frequency domain using pseudo-Wigner distribution (PWD). These distributions with their extracted features two-dimensional time- frequency viewed as target signatures. We have previously demonstrated usefulness PWD for identification...

Wall heating is an alternative method for residential that used in a limited part of Europe.The goal this study was to show the feasibility Nordic market and provide comprehensive picture wall its functionality compared traditional methods, i.e. radiators floor heating.The conducted using literature review, calculations, survey.Simulations were made computer software EnergyPlus (US Department Energy).Results showed placement panels interior walls results lower heat loss than outer walls, can...