Estimation of PV Output Power for Dhaka City

The daily output of PV panel has been estimated by calculating daily solar radiation. This calculation of solar radiation is necessary to estimate the PV output power on any particular day of the year for various applications. To run photovoltaic systems properly the estimation of PV output is also important. The output power of a PV panel can be estimated if the amount of solar energy incident on it, efficiency of the panel and its area are known. The area and the efficiency of a panel can be obtained from the manufacturer’s data. So, in this paper, a procedure to calculate the daily solar energy for any day of the year in any place has been developed first, and then, the estimation process of the PV output power is described. Keywords: PV System, Solar radiation,

Energy Efficiency and Sustainability in Outdoor Lighting - A Bet for the Future

Electricity from PKL tree has been developed using PKL extract previously. In this work, electricity production has been developed using living PKL tree. It has been studied that an electrochemical cell has been developed using living PKL tree. The experimental data have been demonstrated in that way, hence this method is feasible and effective. Electricity has been conducted from PKL (Pathor Kuchi leaf) using PKL extract with positive and negative electrodes. Several research papers have been published on it in the recognized journal at home and abroad. This research work has expressed the electricity generation from living PKL tree. It can be found that due to the difference of the pH between the soil and the living PKL tree, electricity can be produced. The performance of this electricity has been studied. This work has been developed by authors, which produced electricity from living PKL tree without damaging the PKL plants. The unused suitable land areas such as hilly areas, forest areas, and coastal areas, those could supply clean power for remote communities all over the world

In vitro propagation of Gladiolus dalenii from the callus through the culture of corm slices

Production of sufficient numbers of plants of a unique genotype is possible using in vitro culture system. In this study, the effects of various concentrations and combinations of plant growth regulators for in vitro regeneration of gladiolus were used with corm fractions as explants. Thus, an efficient in vitro propagation method was developed for Gladiolus dalenii using corm slices as explants. The highest rate of 90% explants for callus induction was observed on MS medium supplemented with 7.5 mg/L NAA after culture initiation of 90 days. Calli responded to form well developed shoots on transferring to medium containing MS + 0.5 mg/L BA + 0.5 mg/L Kin, in which 70% of the cultured calli responded to produce shoots. The average number of shoot per culture calli was 20 ± 2.40 and the average shoot lengths of 4.50 ± 0.45 cm were achieved in this medium after culture of 60 days. Recurrent callus induction and continuous plant regeneration were also observed in the same medium during the passage of shoot induction period. Shoots rooted well when they were excised individually and implanted on half-strength MS medium supplemented with 2.5 mg/L IBA, which resulted 90% shoot induced roots after culture of 30 days. The average number of root per shoot was 10 ± 1.20 and the average root length of 5.5 ± 0.70 cm was observed in this medium. Eighty percent (80) of the in vitro raised plantlets were survived in the natural environment

Food aid programme during restricted hilsa fishing period: effectiveness and management perspective

Hilsa (Tenualosa ilisha) is geographically and economically important species in Bangladesh. To conserve hilsa, the government of Bangladesh has introduced fishing ban for certain periods of the year and also provides food assistance to hilsa fishers during the restriction period. Inadequate management often pushes real fishers out of the assistance programme and therefore, this study focused on assessing the effectiveness of the programme with a view to proposing a better management practice. A total of 202 randomly selected fishermen, living in the villages adjacent to Andharmanik River of Patuakhali district of Bangladesh, were interviewed. The Andharmanik River is famous for the natural breeding of hilsa. Results suggest that the amount of food provided and its distribution pattern were not that effective for the fishermen. Effectiveness was significantly related to the number of earning able family member, income difference between peak and restricted season and loan facility during the restriction period. This study also explained income difference trajectories of the fishermen community. Community-based management with facilitation by the state fisheries department and local government entity may enhance the programme effectiveness. More awareness programme and research are needed in this regard

Novel Molecular Mechanisms of Gangliosides in the Nervous System Elucidated by Genetic Engineering

Acidic glycosphingolipids, i.e., gangliosides, are predominantly and consistently expressed in nervous tissues of vertebrates at high levels. Therefore, they are considered to be involved in the development and function of nervous systems. Recent studies involving genetic engineering of glycosyltransferase genes have revealed novel aspects of the roles of gangliosides in the regulation of nervous tissues. In this review, novel findings regarding ganglioside functions and their modes of action elucidated mainly by studies of gene knockout mice are summarized. In particular, the roles of gangliosides in the regulation of lipid rafts to maintain the integrity of nervous systems are reported with a focus on the roles in the regulation of neuro-inflammation and neurodegeneration via complement systems. In addition, recent advances in studies of congenital neurological disorders due to genetic mutations of ganglioside synthase genes and also in the techniques for the analysis of ganglioside functions are introduced

The impact of the COVID-19 pandemic on the education of medical, dental and non-medical healthcare professionals in Bangladesh : findings and connotation

Lockdown measures in response to the COVID-19 pandemic had an appreciable impact on the education of all medical, dental, and non-medical healthcare professional (HCP) students. These included the closure of universities necessitating a rapid move to e-learning and new approaches to practical’s. However initially, there was a lack of knowledge and expertise regarding e-learning approaches and the affordability of internet bundles and equipment. We initially con-ducted two pilot studies to assess such current challenges, replaced by a two-stage approach including a full investigation involving 32 private and public universities during the early stages of the pandemic followed by a later study assessing the current environment brought about by the forced changes. Top challenges at the start of the pandemic included a lack of familiarity with e-learning approaches, cost of the internet, lack of IT equipment and the quality of the classes. Universities offered support to staff and students to a varying degree to address identified challenges. Since then, e-learning approaches have widened the possibilities for teaching and learning at convenient times. However, challenges remain. In conclusion, there were considerable challenges at the start of them pandemic. Several key issues have been addressed with hybrid learning here to stay. Remaining challenges include a lack of ICT equipment. However, new innovations will continue