An Evaluation of Computer Aided Learning (BRAC-CAL) in Secondary Schools in Bangladesh.

BRAC initiated Computer Aided Learning (CAL) programme, the first ever in Bangladesh, to introduce ICT based materials in teaching-learning in 2004 Along with digital contents of Science, English and mathematics of secondary level, this programme provided basic ICT and content delivery training to the teachers of programme schools. A qualitative evaluation following the Realist Evaluation framework was designed to evaluate the programme mechanism, context and outcome. Data were collected from six secondary schools selected purposively. Findings showed that both teachers and students enjoyed the CAL materials and also believed that those materials had changed classroom scenario by improving learners’ attention and participation in classroom activities. However, significant difference was not observed between CAL and non-CAL classrooms. Teachers struggled to organise collaborative learning tasks such as group and pair works. Students also had limited participation in teaching-learning process. Irregular electricity supply sometimes hampered use of CAL materials. Furthermore, students had limited access to these materials. Bearing this context the recommendations were to focus more on teachers’ pedagogic improvement and to create more scopes for students’ self use of these materials

Combining technology and work organization : an analysis of complementarity between IT and decentralization across firms of different size

This paper examines whether information technology (IT) and decentralized work organization are complementary only for large firms or also for smaller firms. Empirical evidence, which suggests complementarity between IT and decentralization, is mainly based on large firms. Using data from a sample of 3292 SMEs and of 598 larger firms from the manufacturing and service sector in Germany, I can observe firms’ IT intensity in terms of enterprise software and computer use and whether firms have a decentralized work organization. I find that SMEs with decentralized work practices tend to use IT more intensively. Moreover, for the sample of SMEs, IT and decentralized work organization are individually associated with higher productivity but the combination of IT and decentralization does not yield a productivity premium. Contrarily, for the sample of larger firms, the results show that the productivity of IT depends positively on decentralization. The findings suggest that combining IT and decentralized work organization seems to be a successful strategy only for larger firms

ICT and global sourcing - evidence for German manufacturing and service firms

This paper analyses the relevance of information and communication technologies (ICT) for firms’ robability of global sourcing of inputs. Using firm-level data from Germany in 2009, which include mainly small and medium-sized firms, the empirical analysis differentiates between the manufacturing and service firms. The results show some differences between the manufacturing and service sector. Controlling for various sources of firm heterogeneity, the global sourcing probability is increasing in the firms’ share of employees with Internet access in the manufacturing sector. E-commerceintensive firms are more likely to source inputs from abroad but generally, this relationship between e-commerce and global sourcing is only robust in services and much stronger there than in manufacturing. In both sectors, it is strongest in industries with higher upstream industry diversity. Moreover, labour productivity is positively linked to global sourcing. The findings support arguments for the importance of the Internet for global trade and they confirm the productivity advantage of importing in comparison to non-importing firms that is stated in the literature

Design And Implementation Of Co-Operative Control Strategy For Hybrid AC/DC Microgrids

This thesis is mainly divided in two major sections: 1) Modelling and control of AC microgrid, DC microgrid, Hybrid AC/DC microgrid using distributed co-operative control, and 2) Development of a four bus laboratory prototype of an AC microgrid system. At first, a distributed cooperative control (DCC) for a DC microgrid considering the state-of-charge (SoC) of the batteries in a typical plug-in-electric-vehicle (PEV) is developed. In DC microgrids, this methodology is developed to assist the load sharing amongst the distributed generation units (DGs), according to their ratings with improved voltage regulation. Subsequently, a DCC based control algorithm for AC microgrid is also investigated to improve the performance of AC microgrid in terms of power sharing among the DGs, voltage regulation and frequency deviation. The results validate the advantages of the proposed methodology as compared to traditional droop control of AC microgrid. The DCC-based control methodology for AC microgrid and DC microgrid are further expanded to develop a DCC-based power management algorithm for hybrid AC/DC microgrid. The developed algorithm for hybrid microgrid controls the power flow through the interfacing converter (IC) between the AC and DC microgrids. This will facilitate the power sharing between the DGs according to their power ratings. Moreover, it enables the fixed scheduled power delivery at different operating conditions, while maintaining good voltage regulation and improved frequency profile. The second section provides a detailed explanation and step-by-step design and development of an AC/DC microgrid testbed. Controllers for the three-phase inverters are designed and tested on different generation units along with their corresponding inductor-capacitor-inductor (LCL) filters to eliminate the switching frequency harmonics. Electric power distribution line models are developed to form the microgrid network topology. Voltage and current sensors are placed in the proper positions to achieve a full visibility over the microgrid. A running average filter (RAF) based enhanced phase-locked-loop (EPLL) is designed and implemented to extract frequency and phase angle information. A PLL-based synchronizing scheme is also developed to synchronize the DGs to the microgrid. The developed laboratory prototype runs on dSpace platform for real time data acquisition, communication and controller implementation

The Emerging Digital Culture of Bangladesh: Problems and Prospects

The neoliberal globalization process accelerates the development of information and communication technologies in the postmodern society. With the process of these development there emerges the concept of digitalization. The traditional culture of Bangladesh is being replaced by the digital culture and mostly due to the influence of information and communication technologies. And in these cases web technologies, Internet, satellite communication throughout the world are playing the key role in this regards. The traditional culture like the celebration of Pahela Baishakh, Halkhata and other customs of the family life as well as kinship ties also has been reshaped due to the influence of virtual communication and digital technology. Now we are living in the era where the personal presence became lesser significant than that of virtual presence. In almost every sector like agricultural, business, governance systems are running mostly through electronic systems like e-commerce, e-governance, e-shopping and likewise. The digitalization of all of these sectors has both pros and cons. Digital culture is emptying the roots and displaces it with the hollywoodization and bollywoodization. Digitalization saves time and money and promote better and quicker services thus accelerate the development of the country but at the same time it has different types of complexities too. Throughout the present study it is trying to find out the emerging digital culture of Bangladesh along with its problems and prospects. The study has been conducted after reviewing the previous research papers and the statistical data regarding information and communication technologies from Bangladesh perspectives. And at the end some recommendations has been proposed in this study for the adequate and necessary development of the digital culture of Bangladesh for the betterment of the country. Keywords:Digital Culture, Information and Communication Technology, Civilization, Traditional culture, Globalization, E-Commerce, E-Governance, Social Media, Virtual Relationship, Bangladesh.

Vascular smooth muscle RhoA counteracts abdominal aortic aneurysm formation by modulating MAP4K4 activity.

滋賀医科大学博士（医学）application/pdfThesis or DissertationCommunications Biology. 2022 Oct 7;5(1):1071.令和4年度thesi

EdgeGlass: Exploring Tapping Performance on Smart Glasses while Sitting and Walking

Department of Human Factors EngineeringCurrently, smart glasses allow only touch sensing area which supports front mounted touch pads. However, touches on top, front and bottom sides of glass mounted touchpad is not yet explored. We made a customized touch sensor (length: 5-6 cm, height: 1 cm, width: 0.5 cm) featuring the sensing on its top, front, and bottom surfaces. For doing that, we have used capacitive touch sensing technology (MPR121 chips) with an electrode size of ~4.5 mm square, which is typical in the modern touchscreens. We have created a hardware system which consists of a total of 48 separate touch sensors. We investigated the interaction technique by it for both the sitting and walking situation, using a single finger sequential tapping and a pair finger simultaneous tapping. We have divided each side into three equal target areas and this separation made a total of 36 combinations. Our quantitative result showed that pair finger simultaneous tapping touches were faster, less error-prone in walking condition, compared to single finger sequential tapping into walking condition. Whereas, single finger sequence tapping touches were slower, but less error-prone in sitting condition, compared to pair simultaneous tapping in sitting condition. However, single finger sequential tapping touches were slower, much less error-prone in sitting condition compared to walking. Interestingly, double finger tapping touches had similar performance result in terms of both, error rate and completion time, in both sitting and walking conditions. Mental, physical, performance, effort did not have any effect on any temporal tapping???s and body poses experience of workload. In case of the parameter of temporal demand, for single finger sequential tapping mean temporal (time pressure) workload demand was higher than pair finger simultaneous tapping but body poses did not affect temporal (time pressure) workload for both of the sequential and simultaneous tapping type. In case of the parameter of frustration, the result suggested that mean frustration workload was higher for single finger sequential tapping experienced by the participants compared to pair finger simultaneous tapping and among body poses, walking experienced higher frustration mean workload than sitting. The subjective measure of overall workload during the performance study showed no significant difference between both independent variable: body pose (sitting and walking) and temporal tapping (single finger sequential tapping and pair finger simultaneous tapping).ope