Students’ Perception of Digital Texts Reading: A Case Study at the English Education Department of Universitas Kristen Indonesi

This study was conducted to explore students' perceptions of reading digital texts. To attain the objective, the data were collected through an online questionnaire uploaded in Google Form and an interview. The questionnaire was intended to collect quantitative data concerning the participants’ responses about their interest and motivation, digital text reading efficacy, problems in digital text reading, and preference towards digital or printed text reading. The participants of the study were 65 English pre-service teachers selected from the whole students of the English Education Department of Universitas Kristen Indonesia in the academic year 2019/2020, and the sample was 65 participants. The collected data were analyzed descriptively using Microsoft excel. The findings revealed that the participants perceived digital texts reading positively. They preferred reading digital texts because they were motivating, interesting, and suite their expected way of reading. The main problem they encountered in reading digital texts was due to the screen light which could irritate their eyes. &nbsp

Real, virtual, and other personas in an online collaborative environment

This presentation reports on a study of an unusual online course, which incorporates collaboration across campuses in teaching about evaluation of information technologies. Issues raised by new information technologies are major foci within the course, and also entry points for our study of its implementation.published or submitted for publicationis peer reviewe

A service-oriented infrastructure for collaborative learning in virtual knowledge spaces

Classical knowledge production is an author-centered process. The emergence of cooperative internet technologies such as wikis or blogs shows a shift towards stronger cooperative production and communication of knowledge, closing the gap between readers and authors. The incorporation of such participatory mechanisms into CSCL/CSCW systems raises several new requirements. We present an open service infrastructure that provides an architecture meeting these demands, while integrating itself into a network of already-established services.Education for the 21 st century - impact of ICT and Digital Resources ConferenceRed de Universidades con Carreras en Informática (RedUNCI

Kakskeelse lapse lugema õpetamine koolieelses lasteasutuses kolme Tartu maakonna eestikeelse lasteaia näitel

http://tartu.ester.ee/record=b2693698~S1*es

AHHAA Teaduskeskuse poolhumanoidroboti Oskar kaasajastamine ja ühildamine ROS tarkvararaamistikuga

AHHAA Teaduskeskusel on kaks kaugjuhitavat robotit Oskar, mis on mõlemad amortiseerunud. Töö eesmärgiks on Oskari arhitektuuri kaasajastamine uue versiooni loomiseks ja robotile ROS-i toe tagamine. Töö tulemuste saavutamiseks kavandati uus arhitektuur ja arendati sellele ROS-i draiver. Töö tulemusena loodi Oskar 3 arhitektuur ja implementeeriti ROS-i draiver koos MoveIt toega. Töö täitis oma eesmärgid ja selle baasilt on võimalik luua nõuetele vastav robot

The long-term effect of biochar on Fragi-Stagnic Albeluvisol´s properties

Bakalaureusetöö Põllumajandussaaduste tootmise ja turustamise õppekavalBiosüsi on pürolüüsi tahke produkt, mida on Lõuna–Ameerikas kasutatud juba mitu tuhat aastat. Biosütt eristab tavalisest biomassist toodetud söest kasutusotstarve, milleks on mulla omaduste parandamine.Töö eesmärgiks on uurida biosöe mõju kahkja mulla füüsikalis–keemilistele omadustele 10 aastat pärast mulda viimist ja hinnata selle mõju talinisu saagile. Põldkatse rajati 2011 aasta kevadel Põlvamaale, Ahja vallas, Kosova külas asuvas tootmistalus. Katses oli kaks varianti, kontroll ja biosüsi, mis olid neljas korduses. Katses kasutatud biosüsi toodi Biolani grillsöetehasest, mis asub Pärnumaal Seljal. Söe tooraineks oli lehtpuuliikide segu kus domineerisid paju ja lepp. Biosüsi toodeti aeglase pürolüüsi tingimustes. Uurimistöös kasutatud mulla keemilis–füüsikalisnäitajad määrati 2020 aasta septembris. Uurimistulemusena selgus, et mulla füüsikalistest näitajatest erines biosöega variandi muld kontrollvariandi omast ainult lasuvustiheduse ja eripinna poolest. Mulla lasuvustihedus oli biosöega lappidel 20–30 cm mullakihis usutavalt väiksem ja eripind 0–20 cm kihis usutavalt suurem. Mulla keemilistest näitajatest oli biosöega variandis suurem mulla C sisaldus ja C/N suhe kõigis kolmes, N sisaldus 0–10 cm ja 20–30 cm ning liikuva K sisaldus 20–30 cm mullakihis. Teised keemilised näitajad olid kontrollvariandiga sarnased. Uurimistööst järeldub, et lehtpuusegust toodetud biosöega saab küll olulisel määral süsiniku sisaldust kahkjal mullal tõsta, ning mingil määral lasuvustihedust vähendada, kuid peamistele mulla füüsikalis– ja keemilistele omadustele biosüsi kahkjal mullal pikemas perspektiivis mõju ei avalda.Biochar is a solid pyrolysis product that has been used in South America for thousands of years. Biochar differs from traditional biomass by it´s usage purpose which is to improve soil properties. The aim of the bachelor thesis is to study the effect of biochar on the physico-chemical properties of decaying soil 10 years after application to the soil and to evaluate its effect on winter wheat yield. The experiment field was established in May 2011 in a production farm located in the village of Kosova, Ahja municipality, Põlva County. The experiment had two variants, control and biochar, which were repeated in quadruplicate. The biochar used in the experiment was imported from the Biolan charcoal plant located in Selja, Pärnu County. The raw material for the char was a mixture of deciduous species dominated by willow and alder. Biochar was produced under slow pyrolysis conditions. The chemical-physical parameters of the soil used in the research were determined in September 2020. As a result of the research, it was found that the soil of the biochar variant differed from the physical characteristics of the soil from the control parameters only in terms of soil density and specific surface area. The soil density was lower in the 20–30 cm soil layer and the specific surface area was higher in the 0–20 cm layer on biochar variants. Among the chemical parameters of the soil, the biochar variant had a higher soil C content and C/N ratio in all three, N content 0–10 cm and 20–30 cm, and mobile K content 20–30 cm in the soil layer. Other chemical parameters were similar to the control. The research shows that biochar produced from hardwood mixtures can significantly increase the carbon content of bare soils and reduce the density of the soil to some extent, but the main physical and chemical properties of the soil will not be affected by biochar in biennial soil in the long run

Konsociationalistisk förvaltning för fred: Belfastavtalets effekter

Genom en litteraturbaserad teorikonsumerande metod undersöks konsekvenserna av att konsociationalismen tillämpats för att nå konfliktlösning i Nordirland som om mycket realiserats genom förvaltningsstrukturen. Både konsociationalismen och förvaltningen visar sig besitta inneboende problem. Då konsociationalismen inte uppfylls till fullo kan detta komma att påverka det fortsatta samarbetet och därmed fredssituationen negativt. Förvaltningen å andra sidan kan i dagsläget inte uppnå grundläggande demokratiska principer såsom folklig medverkan. Tillräcklig uppmärksamhet har inte riktads mot vikten av en väl fungerande förvaltning, trots att denna besitter förmågan att påverka både attityder och den grundläggande motsättningen i ett konflikthärjat samhälle. Komponenter som är avgörande för konfliktlösning och hållbar fred

Design study of composite repair system for offshore riser applications

Risers in offshore operations are subjected to corrosion during their service life cycle. The use of relatively inexpensive, high strength to weight ratio fibre reinforced polymer composite (FRPC) as a load bearing pipe repair sleeve is an emerging technology that is becoming common for offshore applications. Risers experience complex loading profiles and experimental investigations often incur substantial time, complicated instrumentation and setup costs. The main aim of this research is to develop a design tool for the repair of offshore riser that suffers from external corrosion damage on its surface using FRPC material. The simplest configuration of a fixed platform riser in the form of a vertical single-wall pipe is being considered. Characterization of the stress-strain behaviour of the FRPC laminate in the composite repair system subjected to various load profiles of a common riser is performed. The means of composite repair takes into account the ease of automated installation. The final repair method considers the use of unidirectional pre-impregnated (prepreg) FRPC that is assumed to be helically wounded around the riser. Finite element models of the composite repair system were developed via ABAQUS. Global analysis of the entire length of the riser was omitted as external corrosions usually occurs in a localised manner on the surface of the riser. Instead, local analyses were conducted where boundary conditions were applied to mimic an infinitely long cylindrical structure such as the riser. The local analyses FEA models were made to capture the stress-strain behaviour of the FRPC laminate subjected to different load profiles including static loadings such as internal pressure, tensile load and bending load. The design loads were calculated based on a limit analysis known as Double-Elastic Curve method developed by Alexander (2008). Proper element selection and mesh convergence were carried out to determine the FE model that can minimize the time and CPU memory needed for the simulation without compromising the accuracy of the results. The second part of this research integrated experimental tests to validate the FE model developed using the ABAQUS general purpose code. Due to constraints on cost and supply of materials and equipment, small-scale tests were conducted. Similitude relations were used to determine the scale properties between the model and the prototype. The final results showed that the FE model can represent the real-life tests of corroded riser repaired with off-axis FRPC laminate with great accuracy of more than 85%. Hence can be a useful tool for design and parametric study of the composite repair system. Using the validated FE model, an extensive parametric study of the composite repair system with respect to varying corrosion defects was conducted. The thickness and length of the repair laminate were compared to the ASME PCC-2 standard. Optimum thickness and length of the composite laminate were determined based on the maximum allowable strains computed using the Double-Elastic Curve method. In addition, varying fibre angle orientation of the unidirectional prepreg was considered as it is one of the main factors in helical winding. Based on the results from the parametric study, a simple relation was developed to predict the required thickness of the composite repair system subjected to combined loading. This relation combined with the developed FE model can be used to provide a quick design and performance validation of a composite repair system for offshore riser, which is the main novelty aspect of this research