Miracle-dz/UniFAR-FTUs huggingface dataset:
Local buckling tests on three steel large-diameter tubular columns, Proc., 4th Internat'l Specialy Conf. on Cold-Formed Steel Structures, St. Louis, MO, June 1978, p. 409-463 (78-12)

Local buckling tests were conducted on three short, large-diameter tubular columns. The columns were fabricated,by cold-rolling and welding,from 6.35 mm (~in.) high-strength steel plate with a nominal yield stress of 345 MPa (50 ksi). The diameters were 1.20 m (47 in.), 1.53 m (60 in.) and 1.79 m (70 in.), and the diameter-tothickness ratios (D/t) were 165 to 248. The average buckling stress was limited by the formation either of lobular buckles or of a simultaneous combination of lobular buckles with a ring bulge. The buckling stress values were from 0.814 to 0.941 of the yield stress. The buckling stress and strain, the type of initial buckling, and the post-buckling behavior were found to be functions of D/t. The location of the buckles did not appear to be affected either by the initial geometric imperfections or by the pattern of the longitudinal residual stresses caused by welding. In the post-buckling range the columns could dissipate energy at 15-25% of the buckling stress by the formation of successive sets of lobular buckles. Detailed discription is presented of the testing technique and of the column behavior in the prebuckling, buckling and postbuckling ranges. These three tests, together with the five tests previously conducted by the authors (yield stress also = 345 MPa) gave local buckling stress values which, when plotted against D/t, formed a smooth curve with very little scatter. Present design rules were all found to be conservative with respect to these test results.
Control of a Super-capacitor Based Energy Storage System

The increasing use of electrical technologies within on-board (aircraft, road vehicle, train and ship) power systems is resulting in complex and highly dynamic networks in which energy storage devices have an important role to play, for example to resolve the instantaneous mismatch between load demand and power availability or to provide the flexibility to optimise overall performance. In this thesis, a multi-level controller for a super-capacitor based energy storage system (ESS) is designed, simulated, emulated and validated experimentally to show its effectiveness in smoothing load and managing state-of-charge of the energy storage system.This thesis first investigates the low level control of the dual-interleaved converter, particularly at light load where seven discontinuous conduction modes (DCMs) appear. A thorough analysis of these operating modes is given and validated by simulations and experiments. Based on the analysis, an inverse-model-based feed-forward current controller is implemented, offering a low level converter control interface which serves the high level supervisory controller within the energy storage system.Two supervisory control methods have been proposed in this thesis, both producing a super-capacitor current reference for the low level controller. The first supervisory control not only manages the energy within the ESS but also shields the primary power source from rapid load transients , which has been examined through an emulated ESS in the Intelligent Electrical Power Network Evaluation Facility (IEPNEF). A more advanced supervisory controller is then proposed which in addition to the benefits of the first control, regulates the rate-of-change in power that is drawn from the primary power source in the system. The proposed second control method is implemented within a real super-capacitor energy storage system in IEPNEF, with both simulation and experimental results successfully demonstrating and validating its operation.
Fitness Cross-Country Skiing

This text features 58 colour-coded workouts challenging skiers according to their fitness and skiing ability, and three sample training programmes show how to put it all together for high-level conditioning, cross-training, or racing. Ski expert Steve Gaskill guides readers through the best skiing workouts, drawing on over 25 years of ski coaching experience, including ten with the US ski team.
Detection of Hate Speech Text in Afan Oromo Social Media using Machine Learning Approach

Objectives : This study aims to develop a hate speech detection model for Afan Oromo’s texts on social networks like Facebook and Twitter using a machine learning algorithm. Methods: we collected comments and posts from social media like Facebook and Twitter pages of BBC Afan Oromo, OBN Afan Oromo, Fana Afan Oromo Program, Politicians, Activists, Religious Men, and Oromia Communication Bureau using Face pager tool. The collected data was labelled using Afan Oromo hate speech evaluation system we developed. Text preprocessing tasks applied on data to remove special characters, stop-words, HTML Tags,
THE FEASIBILITY OF MAGNETICALLY LEVITATING HIGH SPEED GROUND VEHICLES

To determine technical feasibility of magnetically levitated and guided highspeed ground transportation vehicles theoretical analyses of four suspension systems were conducted: permanent magnet, electromagnet-ferromagnetic guideway, superconducting magnet, conducting coil guideway, superconducting magnet, conducting sheet guideway. All four were found to be feasible with the last preferred. A magnet-guideway interaction theory was formulated for it based on a Fourier transform calculation of fields from rectangular magnets, assuming the guideway conducting sheets to be infinite. (Author)
Silniki synchroniczne z magnesami trwałymi o dużej sprawności

This paper presents the results of application permanent magnets in medium power AC motors. The main advantages of these motors are robust construction and direct on line start ability. Due to similar size they may replace classical induction motor. The full load characteristics of LSPMSM (Pn=110kW, Un=500V) are shown. They prove that this motor is characterized by higher power factor, higher efficiency and lower input current comparing to induction motor. High efficiency permanent magnet synchronous motor.
Demonstration of an Active Sidestick in the DLR Flying HelicopterSimulator (FHS)

An active cyclic sidestick was successfully integrated in the DLR fly by wire Flying Helicopter Simulator (FHS) in which it was evaluated in flight with 6 pilots taking part in the test program. Tactile cueing functions to reduce pilot workload and to demonstrate operational benets were developed. These were: 1) a mast bending moment limitation, 2) a g-load limitation with cueing in the longitudinal cyclic axis, and 3) a flight guidance function for a standard rate IFR-turn. The latter 2 functions were evaluated in flight. Positive remarks were received. The flight guidance function was workload rated and showed noteworthy reductions and better situational awareness. Another topic was the evaluation of control force parameters suitable for the short pole highly versatile sidestick.
Risk associations for presence of Salmonella sp. in pen samples of breeding pigs in Portugal using binomial multilevel models

As Salmonella is one of the major causes of food-borne disease in the European Union (EU), EU approved legislation to achieve a reduction of the prevalence of this agent in the pig sector. To set the target for this reduction in each country it was decided to carry out baseline surveys in the EU to estimate the prevalence of the agent. The dataset analyzed in this work refers to the cross sectional baseline survey on the prevalence of Salmonella in breeding pigs in Portugal. A total of 1670 pen fecal samples from 167 herds were submitted to fecal culture. Of these samples 170 were positive to Salmonella. Along with the collection of samples a questionnaire was applied to collect information about the herd management and potential risk factors. As data follows a multilevel structure, pen fecal samples (first level) nested within swine herds (second level) a multilevel analysis was performed using generalized linear mixed models (GLMM). The outcome variable was presence/absence of Salmonella in the pen sample. The results show significant associations (p<0.05) at herd level: North Region versus Alentejo Region (OR=3.86), rodents control (OR=0.23), more than 90% of boars home-raised or no boars versus more than 90% of boars from an external source (OR=0.54), semen bought from other herd versus semen bought at insemination centers (OR=4.47) and herds with 170 or more sows (OR=1.82); at pen level: maternity pens versus mating pens (OR=0.39), feed from external or mixed source versus home source (OR=2.81) and more than 10 animals in the pen versus 10 animals per pen (OR=2.02). This study gave valuable information that should be incorporated in future control plans for this agent in breeding pigs in Portugal.
On the Benefits of Joint Optimization of Reconfigurable CDN-ISP Infrastructure

ISP networks have become a critical infrastructure in our society. Traffic in these networks is growing and is increasingly dominated by a small number of large CDNs connecting at multiple locations. Simultaneously, the networks are becoming more flexible, in terms of routing, CDN user mapping, and also regarding the IP topology: emerging optical technologies allow to flexibly reconfigure the network. This paper studies the potential gains of these reconfiguration flexibilities. The idea is to make CDN-ISP infrastructure demand-aware, that is, to re-optimize it towards the changing end-user demands over time. We present an optimization framework and conduct an extensive evaluation using data from a large European ISP. We find that such a reconfigurable infrastructure has indeed a high potential: by leveraging spatial and diurnal traffic patterns, the efficiency of ISP networks and CDNs is improved significantly. Specifically, the required backbone capacity is reduced by 15% while reducing path lengths by 30%, on average and during the critical peak hour. Moreover, such infrastructures can leverage re-optimizations during specific events, like the COVID-19 pandemic, and under link failures. We optimistically assume a cooperative environment of ISPs and CDNs, and we conclude by discussing trends that foster the identified benefits in practice.
Fostering Creativity Through a Nonlinear Approach to Teaching Technology at Wood River Middle School

FOSTERING CREATIVITY THROUGH A NONLINEAR APPROACH TO TEACHING TECHNOLOGY EDUCATION AT WOOD RIVER MIDDLE SCHOOL Warren E. Hull School of Technology Master of Science The purpose of this thesis is to address the following research questions: 1) what is the current status of creativity research in a typical classroom, and 2) how does an instance of exemplary teaching serve to encourage creativity in a technology education setting? The first research question is focused on through a thorough review of published literature on creativity in order to frame the second research question. The second research question is addressed by understanding how Mr. Brad Thode, the technology teacher at Wood River Middle School in Hailey, Idaho, encourages his students to be creative. By investigating this one program, it will provide a greater understanding and deeper insight into how to promote creativity in students. Specifically, a phenomenological case study approach is used to investigate Mr. Thode and his nonlinear teaching style and to see how he fosters and promotes creativity in his classroom and among his students. Special attention is given to practices, methods, traits, etc. that have the potential to be replicated or modified for use in other classrooms. Findings are framed in the four generally accepted components of creativity: person, product, process, and press. Results indicate that creativity can be modeled and recommendations for promoting creativity in the classroom are outlined.
Psychosocial Factors Associated with Depression and Anxiety During COVID-19 Pandemic Among Outpatients with Depression

Objective Long-term social distancing, isolation, and economic fallout may be significant psychological triggers during pandemic, such as COVID-19, especially for those with underlying psychiatric illness. This study was conducted to address the psychological impact of COVID-19 pandemic among patients with depression based at a teaching hospital in Malaysia. Methods This is a cross-sectional online study among patients with depression from University Malaya Medical Centre, using Generalized Anxiety Disorder-7 (GAD-7), Montgomery-Åsberg Depression Rating Scale-Self Assessment (MADRS-S), Insomnia Severity Index (ISI), Multidimensional Scale of Perceived Social Support (MSPSS), Knowledge, Attitudes, and Practices (KAP), and Social Media Addiction during COVID-19 Pandemic (SMACOP). Results One hundred seventy-eight patients participated in this study. The mean total of the KAP score is 12.65 (SD = 2.65), with knowledge section (mean = 7.34 [SD = 2.13]), attitudes section (mean = 2.63 [SD = 0.58]), and practices section (mean = 2.69 [SD = 1.00]). They scored moderately on the MADRS-S (mean = 21.03 [SD = 4.62]) and ISI (mean = 20.25 [SD = 4.62]) but had high GAD-7 scores (mean = 16.8 (SD = 6.27]). From the multiple logistic regression analyses, depressive symptoms of greater severity (MADRS-S 18–34) are significantly associated with more severe insomnia (P < .001, adjusted OR = 9.101, 95% CI: 3.613–22.924). Furthermore, the high anxiety level is associated with the younger age group (P = .029, Adjusted OR = 2.274, 95% CI: 1.090–4.746), greater severity of insomnia (P < .001, Adjusted OR = 22.9, 95% CI: 6.145–85.343), and higher risk of COVID-19 related social media addiction (P = .011, adjusted OR = 2.637, 95% CI: 1.253–5.550). Conclusion This study demonstrates the high levels of sleep disturbances and anxiety symptoms experienced by outpatients with depression during the COVID-19 pandemic. These are closely linked to the younger age group and at-risk social media addiction related to COVID-19.
Broadband microstrip antennas

Introduction of Microstrip Antennas (MSA). Regular Shaped Broadband Microstrip Antennas. Planar Broadband MSA. Multi-Layer MSA. Stacked Multi-Resonator MSA. Compact Broadband MSA. Tunable and Dual Frequency MSA. Broadband Circularly Polarized MSA. Broadband Planar Monopole Antennas. Appendix A Substrate Characteristics. Appendix B Design Equations for Microstrip Lines. Appendix C Multiport Network Model.
An empirical rail track degradation model based on predictive analysis of rail profile and track geometry

It is generally observed that the condition of rail tracks degrades rapidly over time until and unless effective maintenance is carried out. In the rail industry, rail maintenance actions are usually reactive, which means that maintenance is carried out after a defect has been identified. Unfortunately, this approach can lead to general safety concerns and may result in costly maintenance. Predictive maintenance, which aims to predict the future behaviour of track degradation based on the analysis of already recorded data, can be used to identify defects in advance, thus providing a solution for the above safety and cost concerns. Two important questions for which answers are sought in predictive maintenance of rail track are: where does the fault occur and when. The aim of the research presented in this thesis is to develop a novel predictive rail track degradation model that answers the above questions. The proposed model consists of an alignment component for effective alignment of data and a degradation component for understanding rail track degradation based on rail profile and track geometry parametric analysis. The thesis takes an incremental approach to data alignment proposing three different algorithms namely, distance alignment, fixed window based alignment and parameter based alignment. It is proven that the latter approach provides the most accurate data alignment algorithm. The degradation component of the proposed model is based on a comprehensive multivariate and univariate analysis. In multivariate analysis, parameters of a base file i.e. a file consisting of parameters belonging to the same segment of the rail track at a given time of measurement are predicted using all other parameters of the same file. In univariate analysis, every parameter of a given base file is predicted, temporally, from the corresponding parameters in the previous base files. Such contribution analysis manifests the level to which each parameter contributes in predicting other parameters and over time. Subsequent to univariate and iii multivariate analysis the predictive errors are thresholded into either exceedences i.e. they exceed the threshold line, needing immediate maintenance, or normal i.e. they are below the threshold line, needing no immediate maintenance. The research presented in this thesis shows that in multivariate analysis, rail profile parameters were predicted with 97% prediction accuracy below threshold, whereas track geometry parameters were predicted with 99% prediction accuracy below threshold. Both univariate and multivariate analysis will serve as the basis in monitoring track conditions and thus finding track degradation problems. This will greatly aid in planning predictive track degradation by providing an objective means of evaluating track conditions and hence the over all life of the rail track will increase.
Robotic Gripper Resists Torsion And Lateral Forces

Gripper for end effector of robot shaped to tolerate large initial misalignments with object gripped. Gripping surfaces contoured to prevent lateral forces from prying them apart. Ridges on handle mate with grooves in finger. Same ridge-end-slope pattern appears on opposite face of handle so two opposed fingers grip it.
Zastosowanie kreatywnego agenta oprogramowania w module giełdowym IKGSWI wspomagającym inwestycje kapitałowe

W obecnych czasach komputer jest narzędziem powszechnie uŜywanym, nie jest juŜ elitarnym instrumentem naukowców. Ogromna część mocy obliczeniowych jest ukierunkowana na uatrakcyjnienie i uproszczenie z uprzyjemnieniem codziennych czynności. Bardzo waŜnym elementem jest obecnie stopień „przyjazności” komputera w stosunku do uŜytkownika. Komputerowi awatarzy (bezpośrednia reprezentacja uŜytkownika komputera w cyberprzestrzeni), asystenci czy wirtualni agenci sprawią juŜ wkrótce, Ŝe komputer jeszcze bardziej oŜyje. Artykuł porusza te tematy oraz prezentuje projekt wprowadzenia agenta dydaktycznego w IKGSwI na uczelnie wyŜsze. Słowa kluczowe: agent, asystent, kreatywność, wirtualny doradca inwestycyjny
ToA Based Sensor Localization Algorithm in Underwater Wireless Sensor Networks

Currently several kinds of sensor localization methods have been developed for terrestrial wireless sensor networks. This study, in order to extend the field to underwater environments, a localization technique is studied for UWSNs (Underwater Wireless Sensor Networks). In underwater environments, RF (Radio Frequency) signal is not suitable for underwater usage because of extremely limited propagation. Because of that reason UWSNs should be constituted with acoustic modems. But, to realize underwater application, we can borrow many design principles from ongoing research for terrestrial environments. So, in this paper we introduce the modified localization algorithm using ToA method which is based on the terrestrial research. First of all, we study the localization techniques for terrestrial environments where we investigate possible methods to underwater environment. And then the appropriate algorithm is presented in the underwater usage. Finally the proposed underwater based localization algorithm is evaluated by using computer.
Alternative Presents and Speculative Futures: Designing fictions through the extrapolation and evasion of product lineages.

The core question addressed by this invited keynote and conference paper is how fictions are designed to negotiate, critique and realise the multiplicity of possible new technological futures. Focusing on methods, processes and strategies the presentation initially describes how things/technologies become products, employing the perspective of domestication to describe the transition from extraordinary to everyday. This development suggests a product history, a traceable lineage that goes back through generations, each one a small iteration of the previous. By modelling this lineage, design fictions can do two things: 1. Project current emerging technological development to create Speculative Futures: hypothetical products of tomorrow. 2. Break free of the lineage to speculate on Alternative Presents. These fictions effectively act as cultural litmus paper, either offering vignettes of how it might be to live with the technology in question or challenging contemporary applications of technology through demonstrable alternatives. The presentation focused on how these two types of fiction are created, how they differ from science fiction, other modes of future thinking and technological critique - more specifically how both methodologies utilise designed artefacts. What informs the development, aesthetics, behaviour, interactions and function of these objects? Once created, how and where do they operate? How can we gauge and understand their impact and meaning? As a consequence of the presentation Auger was invited to run workshops and projects in Basel (Hochschule fur Gestaltung und Kunst) and HEAD (Haute ecole d’art et de design), Geneva and is advising on the design of a new masters programme at the Basel Hochschule.
Instructional interactions and online course effectiveness at a large Mexican organisation

This research focused on the relationship between online interactions and course effectiveness in a corporate setting. The research questions were: How do learners interact with the content, the teacher and other learners in online courses? How effective are online courses characterised by high levels of different types of interactions? Which online course design (i.e., emphasising learner-content, learnerteacher or learner-learner interactions) results in the highest levels of effectiveness? The research was conducted in a large Mexican organisation, involving 163 students, 30 teachers and 3 academic assistants. Three versions of an online course were designed, each emphasising a single type of interaction, delivered online, thoroughly evaluated and compared. The researcher used a mixed-methods approach, combining quantitative and qualitative data. She collected data through surveys, server logs, think aloud protocols, interviews, messages in discussion forums, exams, observations, sales records and a focus group. Thematic analysis was used across all sources of qualitative data. Results showed that course design does not dictate the type of interactions that students use. In corporate settings, an online course can be effective in terms of satisfaction, learning, knowledge transfer, business results and return on expectations, as long as one of three types of interaction (learner-content, learner-teacher or learner-learner) features prominently in the design, and delivery is consistent with the chosen type of interaction. The main contributions to knowledge of this thesis are: an in-depth understanding of interactions in the design and delivery of online courses in a large organisation; a comprehensive evaluation of online course effectiveness; the expansion of the interaction equivalency theorem; and how the above contributions can add value for learners and make online programmes a powerful lever for organisational change. Conclusions may be valuable for academics and practitioners interested in corporate elearning. This study also provides evidence-based recommendations for online learning in organisations.