Engaging Diverse Secondary Students in International Collaborative Networked Learning

This study examines the processes of engaging a group of highly diverse 7th and 8th grade students in the utilization of information and communication technology (ICT) for collaborative activities through a global networked learning environment called APEC Cyber Academy. Thirty-six middle school students went through a nine-week project-based learning program that aimed at improving ICT skills and promoting international peer learning. Although students showed strong interest in learning about ICT, the findings suggest that students need to be coached in collaboration skills, given appropriate roles to ensure proper division of labor, and supervised closely to ensure the completion of tasks

Could virtual learning communities of practice outpace tangible learning communities of practice in networked learning environments

[[abstract]]The paper first characterizes the differences between tangible learning communities of practice and virtual learning communities of practice and claims that virtual learning communities of practice is one of the most significant ingredients in networked learning environments. Two empirical studies, which are associated with the application of PBL and Role Play Simulation and Game respectively, are examined against the current practice of networked learning in terms of learning behaviors and learning performance between virtual teams and tangible teams in the studies. The results of the studies reveal that tangible teams outperformed virtual teams almost in all directions in terms of constructive learning

APEC Cyber Academy: Integration of Pedagogical and HCI Principles in an International Networked Learning Environment

This chapter introduces how APEC Cyber Academy, an international networked learning environment designed for K-12 students, can foster global collaboration through the integration of sound pedagogy and human computer interaction (HCI). Pedagogical principles that encourage project-based learning, knowledge construction, collaborative learning, community building, and critical thinking are incorporated into the design of this human computer interface. Furthermore, HCI is enriched by 3D virtual reality, multi-player games, an intelligent agent, video/voice conferencing, text-to-speech technologies, and instructional modules that are rooted in constructivist and self-regulated learning. APEC Cyber Academy provides a platform for engaging students in global collaboration and increasing information and communications technology (ICT) skills

APEC Cyber Academy: Integration of Pedagogical and HCI Principles in an International Networked Learning Environment

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Inhabited Virtual Learning Worlds and Impacts on Learning Behaviors in Young School Learners

The paper outlines a new paradigm and its underlying rationales for implementing networked learning environments that is emerging from new technologies such as multi-user platform, virtual worlds, virtual learning community, and intelligent agents. The proposed paradigm of the networked learning environments is described as inhabited virtual learning worlds (IVLW), which is a shared learning space in 3-D format and populated with avatars that are the representations of learners who are geographically dispersed around the world. The virtual learning worlds are also composed of objects such as intelligent agents and learning materials. A pilot system is created based on the discussed rationales of inhabited virtual learning worlds. A preliminary empirical study focusing on the selected learning behaviors in young learners also has been conducted with the pilot system. The results of the empirical study and suggestions for enhancing the pilot system are discussed in the closing section of the article

Relative Energy Variation Characteristics Considering Interaction between Waves and Vegetation Structure

Although viscous sediment environments along the coast strongly attenuate waves, the attenuation dynamics and physical mechanism governing the attenuation process remain relatively unknown. Extremely complex interactions between muddy seabed have become increasingly important for wave evolution studies pertaining to coastal areas. The coastal protection function of mangroves was confirmed during the 2004 South Asian tsunami. Nevertheless, most research has been limited to macro-qualitative analyses, including those on variations in the transmission coefficient Kt and reflection coefficient Kr, and subsequent comparisons. However, determining the micro-physical characteristics is challenging, similar to coastal vegetation analyses with respect to mangrove vegetation characteristics. This study aims to quantify the attenuation difference in the wave energy owing to the coastal vegetation structure, under different layout conditions and combinations. Particle image velocimetry (PIV) technology is used to explore the variations in the velocity field and velocity distribution during the interaction process and calculate the wave-induced kinetic energy before and after setting up the vegetation structure. The research results emphasize that the resistance and frictional effects generated by vegetation are inversely proportional to the size of the stem, and the variation of kinetic energy determined from the velocity distribution and the thickness of the vegetation stem is mainly due to the larger frictional resistance of dense vegetation, relative to the fast flow velocity above the vegetation. Different vegetation heights slightly affect the short-period waves; however, the impact on energy reduction was smaller. For long-period waves, vegetation height significantly reduces wave kinetic energy

<i>Plantago asiatica</i> Seed Extracts Alleviated Blood Pressure in Phase I–Spontaneous Hypertension Rats

Arterial pressure of each new breeding spontaneous Phase-1 hypertension (P1-HT) rat was recorded for 5 min by intravascular femoral artery catheter that served as a reference value prior to treatment. In the acute antihypertensive test, 0.36 g/kg Bwt of Plantago asiatica seed extract (PSE) was administered, via gavage feeding, to P1-HT rats, and the arterial pressures were continuously recorded for 1 h. The acute antihypertensive effects of PSE on P1-HT rats appeared within 15 min after PSE administration and lasted over 1 h with systolic pressure decreased 31.5 mmHg and diastolic pressure decreased 18.5 mmHg. The systolic pressure decreased 28 mmHg and diastolic pressure decreased 16 mmHg in P1-HT rats when simultaneously compared with verapamil hydrochloride (reference drug), whereas there were no significant differences in the pretreated reference values of acute PSE treatment and the untreated control. In the chronic test, P1-HT rats received 0.36 g/kg Bwt day of PSE or equal volume of water for 4 weeks via oral gavage, and the lower blood pressure tendencies of chronic PSE treatment were also found when compared with the controls. The antihypertensive values of PSE were also confirmed in spontaneously hypertensive rats (SHRs). Oral administration with PSE can effectively moderate blood pressure within an hour, while taking PSE daily can control the severity of hypertension, suggesting PSE is a potentially antihypertensive herb

Wavalet-based Active Contour Model for Object

We propose an integrated wavelet-based framework of the active contour model(snake) for segmentation and motion tracking of deformable objects in video sequences