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Facebook and other social media have been hailed as delivering the promise of new, socially engaged educational experiences for students in undergraduate, self-directed, and other educational sectors. A theoretical and historical analysis of these media in the light of earlier media transformations, however, helps to situate and qualify this promise. Specifically, the analysis of dominant social media presented here questions whether social media platforms satisfy a crucial component of learning - fostering the capacity for debate and disagreement. By using the analytical frame of media theorist Raymond Williams, with its emphasis on the influence of advertising in the content and form of television, we weigh the conditions of dominant social networking sites as constraints for debate and therefore learning. Accordingly, we propose an update to Williams' erudite work that is in keeping with our findings. Williams' critique focuses on the structural characteristics of sequence, rhythm, and flow of television as a cultural form. Our critique proposes the terms information design, architecture, and above all algorithm, as structural characteristics that similarly apply to the related but contemporary cultural form of social networking services. Illustrating the ongoing salience of media theory and history for research in e-learning, the article updates Williams' work while leveraging it in a critical discussion of the suitability of commercial social media for education.

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Since its inception, the life history calendar (LHC) methodology has been primarily used for large-scale quantitative life course research. In a methodological innovation, the study described in this article explores the potential of a semistructured LHC to facilitate qualitative life course research. By merging the characteristic detail across multiple domains of the LHC with in-depth interviews, this semistructured protocol succeeds at producing nuanced longitudinal data. The author highlights benefits and limitations of this methodological innovation, as well as implementation advice. Practical matters discussed include choosing time cues, defining domain cues, allowing for multiple starting points, recommended materials, and data analysis. The article includes examples of semistructured life history calendars from a qualitative study of Latino young adults' educational trajectories.

The use of digital technologies is now widespread and increasing, but is not always optimized for effective learning. Teachers in higher education have little time or support to work on innovation and improvement of their teaching, which often means they simply replicate their current practice in a digital medium. This paper makes the case for a learning design support environment to support and scaffold teachers' engagement with and development of technology-enhanced learning, based on user requirements and on pedagogic theory. To be able to adopt, adapt, and experiment with learning designs, teachers need a theory-informed way of representing the critical characteristics of good pedagogy as they discover how to optimize learning technologies. This paper explains the design approach of the Learning Design Support Environment project, and how it aims to support teachers in achieving this goal.

If you are culinary hobbyist, seafood is one attractive option and can be made in your favorite foods in Batam Island. As a regional natural grace of the island surrounded sea, Batam Island and its surroundings has its own characteristics and is a distinctive, and this obviously will not be owned by another local course.

Lanthanum hexaboride is a rare boride formed by the combination of rare earth element lanthanum and non-metallic element boron. It presents in the form of purple powder, insoluble in water and hydrochloric acid, but has many remarkable characteristics: high melting point, high hardness, good chemical stability, excellent resistance to intermediate toxicity, long service life, and low electron escape work. These characteristics make lanthanum hexaborate shine in the field of cathode emission materials, especially in the manufacturing of high-precision and cutting-edge instruments such as electron microscopes, high-power electron tubes, electron guns, magnetrons, etc. In addition, lanthanum hexaborate is widely used in various military and high-tech fields such as radar aerospace, electronic industry, instrumentation, medical equipment, home appliance metallurgy, and environmental protection.

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The centrifugal separator working principle is fed tangentially to the cylindrical top of the centrifugal separator to produce rotation. Through the slot in the air inlet chamber, the flow rate in industrial centrifuge is further accelerated. Centrifugal force moves the heavy particles to the side of the barrel. They move down and accumulate in the collection chamber at the bottom of the separator. The deflector at the top of the collection chamber changes the flow direction. No solid liquid moves upward in the vortex and exits through the top of the separator. The separated solids are removed from the collection chamber periodically or continuously. What Is Centrifugation And Where It Is Used? The centrifugal separator is driven by centrifugal technology. Centrifugation uses centrifugal force to separate particles from solution. This process is mainly used to separate two immiscible substances in the solution. Centrifuge is mainly used to separate solid particles from liquid in suspension; or to separate two immiscible liquids with different densities in emulsion (such as separating cream from milk); it can also be used as solid liquid centrifugal separator, such as drying wet clothes with a washing machine; special ultra-fast tube separators can also separate gas mixtures of different densities, such as enrichment and separation of gaseous uranium hexafluoride; Due to the characteristics of different sedimentation speeds in the liquid, some sedimentation centrifuges can also classify solid particles according to density or particle size. The centrifuge separator is widely used in chemical, petroleum, food, pharmaceutical, mineral processing, coal, water treatment and shipbuilding sectors.

The Lanthanum Yttrium Sputtering Target (LaY) is a fundamental material in thin-film deposition. Combining lanthanum and yttrium, this alloy offers unique properties for coating applications. LaY targets play an essential role in various industries, enabling the development of advanced coatings with enhanced functionalities and performance characteristics.

With additional washing functions, Vertical Centrifuge machine has a better cleaning effect. A pneumatically assisted scraper is adopted to remove the remnant filter cake and the CIP system is optional to secure clarity to be in accordance with GMP Norm. A frequency control system is adopted to ensure a stable start-up. PLC is adopted to ensure complete automatic processes. No need for human supervision. MOST ATTRACTIVE CHARACTERISTIC OF VERTICAL CENTRIFUGE FROM SAIDELI Vertical Centrifuge From SAIDELI FIRST LGZ series full automatic scraper bottom discharge vertical centrifuge is a kind of filtration centrifuge with continuous working, and intermittent discharging by scraper. This series vertical centrifuge machine are widely used on suspension separating of middle size particle, special when the customer do not have a high requirement on solid crystal figure. Vertical Centrifuge From SAIDELI SECOND This vertical centrifuge is a solid-liquid separation machine by centrifugal force, after the revolving drum has reached to a certain speed, the material can be distributed evenly on the wall of drum by feeding pipe, and the filter liquid is discharged by pore of filter cloth installed in the drum, then drained from the outlet pipe, and the solid is left in the drum ,after reaching a certain amount, the scraper is started to scrape the material from the drum wall.

Vertical centrifuge sale at Saideli! Additional washing functions, a pneumatically assisted scraper, the CIP system and a frequency control system. Quality vertical scraper centrifuge, one-step service, competitive cost. Contact us to buy vertical centrifuge machine today.

The equipment is mainly used for the freeze-drying processing of fruits and vegetables. Through the freeze-drying process, the material can maintain physical and biological characteristics, retain the original color, shape, and nutritional composition.

The working principle of freeze-dried food equipment is to freeze fresh food water into a solid state and sublimate it out in a vacuum low temperature environment, so as to obtain dehydrated and dry food. Compared with the traditional drying, drying and spray drying methods, the food freeze-drying technology has less damage to food, and can well retain its original biological characteristics. The food produced has the advantages of long shelf life, good rehydration, good color, good taste and high nutritional content.

The flat plate quick freezing machine is a double-sided contact type quick freezing machine, which has the characteristics of small footprint, large capacity, power saving, fast cooling, high freezing efficiency, stable and reliable. The flat plate quick freezing machine is generally manufactured as a whole and easy to install and use. It is mainly used for quick freezing of fish, shrimp, meat, fruits and vegetables.