EFL SECONDARY AND HIGH SCHOOL STUDENTS’ PERCEPTIONS OF ADVANTAGES AND DIFFICULTIES OF WRITTEN FEEDBACK BY QUESTIONING IN WRITING

This paper reports a descriptive study to enquire into English as a Foreign Language (EFL) secondary and high school (K-12) students’ perceptions about the advantages and difficulties of written feedback by questioning in writing. This paper draws on the data collected as part of a larger project including questionnaires and focus-group interviews. The findings reveal that students held positive perceptions about the impact of written feedback by questioning in writing, particularly on motivation, writing skills, and attitudes and preferences.  Article visualizations

THE INTERACTION BETWEEN SELF-REGULATED LEARNING STRATEGIES AND EFL TEENAGER LEARNERS’ POSTCARD WRITING AT ENGLISH CENTER IN MEKONG DELTA, VIETNAM

The current study aims at investigating the possible interaction of EFL teenage learners’ postcard writing performance (according to A2 level) and their self-regulated learning strategies at an English center. The research also helps to determine the level of interaction between EFL teenagers’ self-regulated learning (SRL) strategies and their postcard writing performance. Thus, it also examined the frequency of use of SRL strategies in writing among those learners. A total of 74 learners completed 32 items in the self-regulated learning strategies questionnaire including six dimensions of three categories namely environmental processes, behavioral processes, and personal processes. Then, three successful writers and three less successful writers were invited into the semi-structured interview. The findings indicated that SRL strategies had a positive impact on EFL teenage learners' postcard writing. The more SRL strategies used in writing, the higher the learners' score. Among these strategies, environmental factors may have a stronger influence than behavioral or personal factors. Specifically, environmental structuring and help-seeking strategies are most frequently used. The findings also showed that EFL teenage learners use SRL strategies to a moderate degree when given writing tasks. Besides, the results of the interview reveal that successful learners self-regulated better than less successful ones. They also self-evaluated their writing more frequently than those who are less successful. Based on the findings of this study, pedagogical implications and recommendations for further study are presented.  Article visualizations

Building a Blockchain-based API Access Control System

API providers can expose their service and data via APIs. However, there must be an access control mechanism in place to control which client can access the APIs. Blockchain technology holds significant potential for this use case. While blockchain may introduce latency, it also offers inherent features including decentralization, data immutability, scalability, and traceability. This thesis explores implementing a blockchain-based access control system and conducts performance evaluations. The proposed comprehensive solution features a straightforward architecture and a user-friendly web interface. It has been deployed in a cloud environment for development, testing, and performance assessments. Extensive experiments have been conducted to analyze latency and determine the system's breaking point. It can withstand 14000 client apps loading it simultaneously within the cloud environment where it was deployed

Restauration de défauts de S-VHS

Le VHS est encore le format de bande magnétique le plus populaire dans le domaine de l'enregistrement de vidéo pour les consommateurs. En raison de la limitation de la résolution horizontale, une version améliorée du format VHS a été introduite: le format S-VHS. Bien que le nouveau format permette de reproduire l'image avec une bonne qualité, il y a encore des défauts: (1) L'image semble brouillée, et les détails manquent de netteté. (2) Les couleurs sont dégradées et manquent d'éclat. Ce travail propose deux méthodes de restauration de défauts de S-VHS. La première combine les techniques de débrouillage avec les techniques de rehaussement. Dans cette méthode, la luminance et la chrominance sont traitées séparément. La deuxième approche proposée utilise une structure de réseaux de neurones en cascade et permet d'utiliser l'information dans la luminance traitée afin de mieux restaurer la chrominance. Les résultats d'expériences ont montré que les deux méthodes proposées sont capables de donner des images plus nettes et plus éclatantes. En plus, grâce à la simplicité et la non-itération, il est possible de les faire fonctionner en temps-reél

Critical success factors for business-to-commerce E-business : lessons from Amazon and Dell

Thesis (S.M.M.O.T.)--Massachusetts Institute of Technology, Sloan School of Management, Management of Technology Program, 2000.Includes bibliographical references.The Internet has becoming an increasingly important channel for both business-to-consumer and business-to-business e-commerce. It has changed the way many companies do business. Every day, more and more companies worldwide are being linked electronically. But the success rate in terms of profitability for these startups is low. This thesis focuses on business-to-consumer aspect of e-commerce. My research is to study the models from a set of online merchants and see how these companies translate their companies' e-business vision into reality. What are the critical factors these online merchants considered as they transform their companies into an e-commerce? This thesis identifies the key success factors of this technology strategy and model as well as helps understanding to what extent this success can be replicated in other markets and industries. Through detailed case studies on Amazon and Dell, we will analyze their strategies and identify the success factors that make them unique to thrive on this competitive landscape of the Digital Economy.by Le Kha.S.M.M.O.T