Suchergebnisse

Smartphone is one of the modern means of communication and entertainment to the people of all ages. But it is considered as the most precious object to the young. Due to the pandemic of COVID-19 most of the times students were bound to stay inside the home and passed their time by using Smartphones. Besides, the provision of online classes and exams prepared the valid ground of using Smartphone for the students. As such the intimacy with Smartphone became a habit of the students that initiated a radical change in their behavioral pattern. The aim of the study was to find out the rate and frequency of using Smartphone by the students, the ways of penetration of western culture in their minds by various social media and to determine the negative impact of age-restricted sites on the students. Therefore, we started to collect data on a random basis from various educational institutions in and around Khulna district of Bangladesh during September to December 2020. The study showed that the use of Smartphone recently accelerated in our country when the government of Bangladesh initiated the provision of online programs for the students. In fact most of the students want to keep their phone in their hands all the time except the sleeping hours. The study demonstrated that uncontrolled use of Smartphone brought fundamental change in the behavior, culture, tradition, thoughts, morality and psychology of the students throughout the country.There is a strong correlation between research findings and the use of Smartphones. As well as presenting the results, this study highlights some far-reaching recommendations to reduce the negative impact of using smartphones.

[ES] This article carries out a review of the different treatment methods for biosolids obtained in waste water treatment plants. First, processes such as digestion, pasteurisation, drying or composting are addressed, among others, the main objective of which is to stabilise sludge for subsequent use. Secondly, methods aimed at eliminating organic matter as much as possible, such as aqueous oxidation and incineration, are described. Data on treatment and destination of biosolids obtained from a survey carried out in different Spanish WWTP are presented in the final part. Mahamud, M.; Gutiérrez, A.; Sastre, H. (1996). Biosolids generated from water purification: (II). Methods of treatment. Water engineering. 3 (3): 45-54. https://doi.org/10.4995/ia.1996.2703 Amorena Udabe, A. (1994), Agricultural valorisation of purification plants in the Pamplona district. Technical Days: Biosolids and purified water as Resources. R. Mujeriego and L. Sala (Eds.). PAG 53-66. Sant Feliu de Guísols, Gerona. Arbiol, M. (1994), Composting of Gardinería and Fangos de Depuradora Biosolids in Castelldefels. Technical Days: Biosolids and Water purified as Resources. R. Mujeriego and L. Sala (Eds.). PAG 75-88. Sant Feliu de Guísols, Gerona. Basteron, R.K. (1994), United States Regulations and Practical Experience on Biosolids Reuse and Disposal, Technical Days: Biosolids and Water purified as Resources. R. Mujeriego and L. Sala (Eds.). PAG 169-192. Sant Feliu de Guísols, Gerona. Chains, A., Cañellas, N., Amengual, A., Calafat, J. (1993), Lode Composting Experimental Plant, Chemical Engineering. 104-106, June 1993. Caus Pía, J.M., Amengual Vich, A. and Cañellas Serrano, N. (1994), Composting and Reuse of Biosolids in Agriculture: The Felanitx case in Mallorca. Technical Days: Biosolids and purified water as Resources. R. Mujeriego and L. Sala (Eds.). PAG 67-74. Sant Feliu de Guísols, Gerona. Fuchs, L., Schwinning, H. (1993), Aeróbic thermophilic digestion. An Economic Process for Low Processing, Water Technology. 109, 47-50. García Ramos, ...