Suchergebnisse

"A major crisis is happening in the world today. It all started in December 2019, when an outbreak of coronavirus disease 2019 (COVID-19) caused by novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) began in Wuhan City, Hubei Province, China. The World Health Organization (WHO) declared the outbreak a public health emergency of international concern. Despite all preventive steps taken by government and health agencies, rising death tolls seem inevitable. The confines of social distancing have driven society toward a sudden and rapid change in all aspects of life, and we are forced to embrace this change as the new "normal". Research conducted in these uncertain times allows us to identify, and analyze the challenges to finding effective strategies and solutions. This book provides current theoretical perspectives, studies, practices, and innovations that will contribute to society during the COVID-19 pandemic, especially in Southeast Asia and India. The current work can be used as a reliable reference, as rapid circulation of credible information, transparent case identification, data sharing, unhindered communication, and peer-reviewed research are most needed during this period of uncertainty."

The International Conference on Research of Educational Administration and Management (ICREAM) held on October 17, 2017 in Bandung, West Java, Indonesia. The aim of ICREAM is to provide a platform for educators, administrators, managers, leaders, policy makers, researchers, scholars, principals, supervisors, graduate students, practitioners, academicians, professionals and teachers from different discipline backgrounds to present and discuss research, developments and innovations in the fields of educational administration. It provides opportunities for the delegates to exchange new ideas and application experiences, to establish business or research relations and to find global partners for future collaboration.

This study aims to evaluate the adsorption isotherm of carbon microparticles prepared from pumpkin (Cucurbita maxima) seeds for adsorbing curcumin (as a model of dye). The results were derived and compared using the kinetics approach based on several standard adsorption isotherm models, namely the Langmuir, Temkin, Freundlich, and Dubinin-Radushkevich models. The second aim is to evaluate the effects of carbon particle size (from 100 to 1000 mm) on the adsorption characteristics. The experimental results showed that the adsorption on the surface of carbon microparticles occurred in monolayer with a physical phenomenon. This is because the active areas are located only on the outer surface of carbon and no surface structure in the carbon is available. This is confirmed by the fact that the produced carbon has less porosity and the pores themselves are mostly produced from the release of inorganic contents during carbon synthesis, while the amount of inorganic content is very less. The confirmation of the adsorption profile was also achieved by testing various sizes of carbon microparticles. Smaller particles have direct impacts on the improvement of adsorption capacity, which is due to the existence of a larger surface area, a larger number of adsorption sites, and additional cooperative adsorption, i.e. adsorbate-adsorbate interaction. Understanding the adsorption phenomena occurring on carbon particles is useful for further developments and applications, such as those of catalysts and adsorbents, especially concerning the production of carbon materials from organic waste.