Chatbots for learning: A review of educational chatbots for the Facebook Messenger

With the exponential growth in the mobile device market over the last decade, chatbots are becoming an increasingly popular option to interact with users, and their popularity and adoption are rapidly spreading. These mobile devices change the way we communicate and allow ever-present learning in various environments. This study examined educational chatbots for Facebook Messenger to support learning. The independent web directory was screened to assess chatbots for this study resulting in the identification of 89 unique chatbots. Each chatbot was classified by language, subject matter and developer's platform. Finally, we evaluated 47 educational chatbots using the Facebook Messenger platform based on the analytic hierarchy process against the quality attributes of teaching, humanity, affect, and accessibility. We found that educational chatbots on the Facebook Messenger platform vary from the basic level of sending personalized messages to recommending learning content. Results show that chatbots which are part of the instant messaging application are still in its early stages to become artificial intelligence teaching assistants. The findings provide tips for teachers to integrate chatbots into classroom practice and advice what types of chatbots they can try out.Web of Science151art. no. 10386

Effect of variety, sowing date and location on yield and nutritional characteristics of sorghum

Sorghum is a forage species important in animal nutrition with an increased potential in the upcoming difficulties in agricultural practices in regard to climate change. Therefore, this paper describes its yield and nutritional parameters depending on growing conditions simulated on two locations (humid and fertile Obora, less fertile and dry Písky), two sowing dates (29. 5. and 25. 6.), and variety (11 varieties). Fresh matter yield was determined by weighing the sample on the field immediately after harvest, Dry matter yield and nutritional content were determined in laboratory by Weende analysis from dried and homogenized samples. Nutritional parameters measured were crude fibre, fat, nitrogen and ash content. Additionally, digestibility of organic as well as dry matter was determined. No significant differences in average fresh matter yield or dry matter yield were found between the two locations and sowing dates in general. There were significant differences among varieties, the highest yields were measured in KWS Zerberus (51.57 +- 3.76 t/ha of fresh matter yield, 15.98 +- 1.34 t/ha of dry matter yield, with higher values observed on Písky). Our data suggest, that sowing date does significantly affect fat content (higher in June sowing). Other nutritional parameters were also higher in sorghum sown in June, with the exception of ash. Nutritional composition of samples did not significantly differ variety to variety, however, there were differences in digestibility of the biomass. Organic matter digestibility was 70.58-85.67%, dry matter digestibility was 73.21-86.70%, with highest digestibility in DMS 45-480. Varieties with the highest importance to farmers in the area are KWS Zerberus, KWS Tarzan and KWS Kallisto (based on dry matter yield), and Triumfo BMR, Sweet Susana and DSM 45-480 (based on digestibility). Sorghum was able to perform well even on dry sandy soil with lower fertilization, which shows the high variability and suitability of sorghum in agricultural practice.O

towards intelligent autonomous sorting of unclassified nuclear wastes

Sorting of old and mixed nuclear waste is an essential process in nuclear decommissioning operations. The main bottleneck is manual picking and separation of the materials using remotely operated arms, which is slow and error prone especially with small items. Automation of the process is therefore desirable. In the framework of the newly funded European project ECHORD++, experiment RadioRoSo, a pilot robotic cell is being developed and validated against industrial requirements on a range of sorting tasks. Industrial robots, custom gripper, vision feedback and new manipulation skills will be developed. This paper presents application context, cell layout and sorting approach

Histone deacetylase inhibitors valproate and trichostatin A are toxic to neuroblastoma cells and modulate cytochrome P450 1A1, 1B1 and 3A4 expression in these cells

Histone deacetylase inhibitors such as valproic acid (VPA) and trichostatin A (TSA) were shown to exert antitumor activity. Here, the toxicity of both drugs to human neuroblastoma cell lines was investigated using MTT test, and IC50 values for both compounds were determined. Another target of this work was to evaluate the effects of both drugs on expression of cytochrome P450 (CYP) 1A1, 1B1 and 3A4 enzymes, which are known to be expressed in neuroblastoma cells. A malignant subset of neuroblastoma cells, so-called N-type cells (UKF-NB-3 cells) and the more benign S-type neuroblastoma cells (UKF-NB-4 and SK-N-AS cell lines) were studied from both two points of view. VPA and TSA inhibited the growth of neuroblastoma cells in a dose-dependent manner. The IC50 values ranging from 1.0 to 2.8 mM and from 69.8 to 129.4 nM were found for VPA and TSA, respectively. Of the neuroblastoma tested here, the N-type UKF-NB-3 cell line was the most sensitive to both drugs. The different effects of VPA and TSA were found on expression of CYP1A1, 1B1 and 3A4 enzymes in individual neuroblastoma cells tested in the study. Protein expression of all these CYP enzymes in the S-type SK-N-AS cell line was not influenced by either of studied drugs. On the contrary, in another S-type cell line, UKF-NB-4, VPA and TSA induced expression of CYP1A1, depressed levels of CYP1B1 and had no effect on expression levels of CYP3A4 enzyme. In the N-type UKF-NB-3 cell line, the expression of CYP1A1 was strongly induced, while that of CYP1B1 depressed by VPA and TSA. VPA also induced the expression of CYP3A4 in this neuroblastoma cell line

Interaktivní prezentace laboratoří s využitím panoramatických pohledů

This contribution describes practical experience from virtual presentation of the department laboratories. The main goal is to provide to students an overall summary of the laboratories presented via a multimedia content with elements of interactivity. They can get a fundamental idea about hardware and software equipment of it and visually connect electronic textbooks and tasks during fulfilling laboratory assignments which will improve educational process.Příspěvek popisuje praktické zkušenosti s interaktivní prezentací výukových laboratoří. Hlavním cílem je poskytnout studentům celkový obraz o vybavení a funkčnosti laboratoří s využitím multimediálního obsahu s prvky interakce. Získají tak přehled o hardwarovém a softwarovém vybavení laboratoří a vizuálně si propojí elektronické výukové texty a návody při plnění laboratorních úloh během výukového procesu

Segregace a jazz

Práce se zabývá vztahem jazzu a segregace ve Spojených státech, především v období 20. a 30. let 20. století. Nastiňuje kulturní kontext počátků jazzu, jeho specifičnost a význam jakožto kulturního fenoménu a analyzuje rasové a socio-kulturní otázky spojených s jazzem.Katedra anglistiky a amerikanistikyDokončená práce s úspěšnou obhajobo

Zpětná vazba uživatelů na přepracovanou webovou prezentaci fakulty

This contribution describes practical experience from conducting heuristic evaluation and web usability test of a new version of Faculty of Mechanical Engineering, VŠB-TUO Web site. Usability is a quality attribute that assesses how easily visitors can access and use Web sites. The goal of most usability testing is to uncover any problems that users may encounter so those problems can be fixed. Web usability test of the new version of the Faculty of Mechanical Engineering proved that most of the updated structure is clear to users and it has logically constructed information architecture.Příspěvek popisuje praktické zkušenosti z heuristického hodnocení použitelnosti a uživatelského testování použitelnosti nové verze webové prezentace Fakulty strojní. Použitelnost webu v obecném smyslu určuje do jaké míry se uživatelé orientují při používání webové stránky. Cílem uživatelského testování použitelnosti je odhalit problémy uživatelů při kontaktu s webovou stránku, tak aby mohli být odstraněny

Using Panorama Views for Interactive Presentation of the Laboratories

This contribution describes practical experience from virtual presentation of the department laboratories. The main goal is to provide to students an overall summary of the laboratories presented via a multimedia content with elements of interactivity. They can get a fundamental idea about hardware and software equipment of it and visually connect electronic textbooks and tasks during fulfilling laboratory assignments which will improve educational process

Využití konceptu web 2.0 v intranetových a internetových portálech

Původní koncept webu stanovil, že se jedná o demokratické, osobní, snadno zhotovitelné komunikační médium a web se často skládal pouze ze statických HTML web stránek, které byly pro uživatele lehce pochopitelné. Rostoucí úspěch webu přenesl rozvoj dynamického webu, kdy obsah je generován z databázích, které jsou aktualizovány pomocí webových redakčních systémů. Nový koncept nazvaný Web 2.0 posouvá vnímaní webu jako nástroj pro interakci mezi uživateli a budování virtuálních sociálních sítí, které samy generují obsah s využitím (ale i bez) vizuální, interaktivní webové stránky. Ty se však pro běžné uživatele staly natolik složitými, že využívají webových služeb vytvořených profesionály. Tento příspěvek popisuje implementaci nových technologií ve webové portálu e-Automatizace a fakultním intranetovém ISO Portálu.The original concept of the web was a democratic, personal, and do-it-yourself medium of communication and it often consisted of static HTML pages which a new Internet user could learn fairly easily. The growing success of web depended on a more dynamic Web, where content management systems served dynamic HTML web pages created on the fly from a content database that could more easily be changed. New approach called Web 2.0 believes that Web usage is increasingly oriented toward interaction and rudimentary social networks, which can serve content that exploits network effects with or without creating a visual, interactive web page. Websites become so advanced that users cannot create them, they are only users of web services, done by professional experts. This contribution describes implementation of advanced technologies in the Internet web portal e-Automatizace and faculty intranet web ISO Portál