Decentralized Orchestration of Open Services- Achieving High Scalability and Reliability with Continuation-Passing Messaging

The papers of this thesis are not available in Munin. Paper I: Yu, W.,Haque, A. A. M. “Decentralised web- services orchestration with continuation-passing messaging”. Available in International Journal of Web and Grid Services 2011, 7(3):304–330. Paper II: Haque, A. A. M., Yu, W.: “Peer-to-peer orchestration of web mashups”. Available in International Journal of Adaptive, Resilient and Autonomic Systems 2014, 5(3):40-60. Paper V: Haque, A. A. M., Yu, W.: “Decentralized and reliable orchestration of open services”. In:Service Computation 2014. International Academy, Research and Industry Association (IARIA) 2014 ISBN 978-1-61208-337-7.An ever-increasing number of web applications are providing open services to a wide range of applications. Whilst traditional centralized approaches to services orchestration are successful for enterprise service-oriented systems, they are subject to serious limitations for orchestrating the wider range of open services. Dealing with these limitations calls for decentralized approaches. However, decentralized approaches are themselves faced with a number of challenges, including the possibility of loss of dynamic run-time states that are spread over the distributed environment. This thesis presents a fully decentralized approach to orchestration of open services. Our flow-aware dynamic replication scheme supports both exceptional handling, failure of orchestration agents and recovers from fail situations. During execution, open services are conducted by a network of orchestration agents which collectively orchestrate open services using continuation-passing messaging. Our performance study showed that decentralized orchestration improves the scalability and enhances the reliability of open services. Our orchestration approach has a clear performance advantage over traditional centralized orchestration as well as over the current practice of web mashups where application servers themselves conduct the execution of the composition of open web services. Finally, in our empirical study we presented the overhead of the replication approach for services orchestration

Metabolic alterations in liver of fresh water fish, C. punctata exposed to arsenic: an adverse and adaptive response to the environment

Arsenic is a major toxicant impairing in diverse metabolic alterations of the organisms and the mechanism of adaptive response is yet to be identified. In the present study, effects of different doses of arsenic in liver of Channa punctata on the regulation of metabolic activities were done. C. punctata, a variety of fresh water fish were exposed to 1, 10 and 1000 ?M concentration of Na2HAsO4 for 1 h. The amount of protein, in response to 1, 10 and 1000 ?M concentration of arsenic were augmented by 184.47% (2.84-folds), 202.82% (3.0- folds) and 317.49% (4.17-folds), respectively and was found to be higher for 1000 ?M dose. Cholesterol contents in liver were similarly exaggerated by 517.45% (6.17-folds), 308.13% (4.1-folds) and 286.41% (3.86-folds), respectively. However, the higher response was found for 1 ?M dose of Na2HAsO4. Similar stimulatory effects on triglyceride level were observed in response to arsenic. Na2HAsO4 causes 443.74% (5.43-folds), 533.11% (6.33-folds) and 548.48% (6.48-folds) enhanced triglyceride level in liver respectively and the effects were pronounced for 1000 ?M concentration. Our findings conclude that arsenic is involved in impairment of metabolic activities in liver of the species of fish and gives an impact to the environment for survival.Int. J. Agril. Res. Innov. & Tech. 6 (2): 87-94, December, 201

From critical pedagogy to critical digital pedagogy: a prospective model for the EFL classrooms

Purpose – Critical digital pedagogy (CDP) is an emerging field in education. The basic tenet of CDP involves taking learners' experiences into account and engaging them in critical thinking about social oppression. With the outbreak of the unprecedented COVID-19 pandemic, CDP has got more currency and appropriacy in the current paradigm shift in learning and teaching. Design/methodology/approach – This paper scrutinizes different aspects of CDP including its origins, theoretical underpinnings and its implementation in different contexts. It also critically reviews Freire's (1972) problem-posing education and Morris and Stommel's (2017) model of CDP. Findings – The article proposes a CDP model based on the previous ones, which includes the core concepts and criteria of CDP and focuses on EFL classrooms. Research limitations/implications – One of the limitations of CDP is gaining the learners' approval in creating an environment of co-constructing knowledge moving away from traditional practices. In addition to that, the use of new media in the classroom can be intimidating for students and stakeholders alike. The lack of logistic support in many rural, remote and underdeveloped contexts cannot be ignored either Practical implications – The paper provides recommendations for future research in CDP. Originality/value – Critical pedagogy (CP) is a teaching approach in which the oppressed are basically focused and teachers and learners construct knowledge together. Recently, with the outbreak of the COVID-19 pandemic, global education had to go online. Consequently, traditional teaching and learning had to undergo a paradigm shift. Along with other changes in traditional teaching and learning practices, there has been a significant change in teaching philosophy. This is how the CDP finds its currency in this emerging unprecedented teaching and learning situation

State of Monitoring and Supervision in Primary Education at Upazila Level in Bangladesh

Primary Education is a basic education for all, monitored by different agencies at the Upazila level to ensure quality. The researcher aims to explore overall monitoring and supervision scenario in primary Education at the Upazila level to ensure quality primary Education. The study used mixed methods with an explanatory sequential design and mostly qualitative approach. It focuses on Upazila Education Office, and other assigned primary Education related organizations and offices; Charghat of Rajshahi and Sundargonj of Gaibandha had been selected as the study area to observe what they, UEO and AUEO of these areas could do and what they are doing in reality. Through different interviews, questionnaire surveys and document reviews, the researcher has explored the scenario of these offices and officers and made some suggestions to ensure quality primary Education in Bangladesh

Morphological and Histological Observation of Embryogenic Calli Derived from Immature Embryo of BRRI Dhan28 (Oryza sativa L.) Variety

Somatic embryogenesis is the most common method for regeneration in rice. In vitrostudies of indica rice (Oryza sativa L.) variety BRRI dhan28 was used for obtainingembryogenic calli from immature embryo culture on Murashige & Skoog mediumsupplemented with 2.5 mg/l dichlorophenoxyacetic acid (2,4-D) and 0.5 mg/lnaphthaleneacetic acid (NAA) showed the highest percentage (91%) of callus induction. Inthis combination 80% embryogenic calli were formed uneven with a crisp texture, loosestructure and salient multicellular structures on the surface while non embryogenic calliwere compact with a smooth surface. Under microscopic observation, embryogenic cells weresmaller, globular and abundant in cytoplasm with one or two big nuclei. Non embryogeniccells were little cytoplasm and few large vacuoles with no or only a small nucleus and wideintercellular spaces. Non embryogenic cells had a very low cell division capability whileembryogenic cells had a high capability for cell division and continued to divide andproduced somatic pro-embryos with a well–defined protodermis which could developfurther through the typical globular, heart, torpedo and cotyledonary stages. Only 80% ofembryogenic cells were induced high differentiation rate and developed 65 globular, 52heart-shape, 43 torpedo and 37 cotyledonary embryos of embryogenic cells after 30 to 45 daysof induction

Combatting Multidrug Resistance in Bacteria: A Novel Approaches for Assessing Efflux Pumps

In order to defend themselves, bacteria contain efflux pumps that assist in evacuating harmful chemicals outside the cell. Antibiotic-active efflux is one of the main mechanisms of drug resistance in bacteria. Membrane transporters use a variety of unrelated compounds as substrates to mediate the efflux process. Because of this, the presence and activity of efflux pumps have a significant impact on the effectiveness of antibiotics, which contributes to bacteria developing drug resistance. Six samples were used in the investigation, and f; foures were found to be E. coli, while the other two were Klebsiella pneumoniae. These isolates demonstrated efflux pump-mediated multidrug resistance. Notably, these bacteria with the Integron integrase 1 gene, called resistant strains, were resistant to 25 different antibiotics. Including Aztreonam, Ampicillin/Sulbactam, Amoxyclav, Cefepime, Cefepime/Tazobactam, Ampicillin, and Cefotaxime, resistance was observed in both E. coli and Klebsiella pneumoniae. Given the complexity of drug efflux transporters, novel approaches are essential to combat multidrug resistance in bacteria effectively. A glucose-triggered rhodamine 6G (R6G) efflux assay from Sigma-Aldrich, USA, was used to test how well efflux pumps work

Capacity of Solid Waste Management of the Municipalities in North-West Region of Bangladesh: A Far Cry with Sustainable Development

The study addresses the overall waste management and drainage system of the Municipalities of Bangladesh. It also endeavors to compare the existing system with the requirements of making a sustainable city following the targets of SDG. It tries to highlight the shortcomings of the existing system of waste management and argues that this is never able to confine sustainability in the environment and the habitats of the Municipalities. The study is empirical in nature mainly based on primary data. Data have been collected from the officials and stakeholders of the three selected Municipalities of a North-west district of Bangladesh- Rajshahi through face to face interview and Focus Group Discussion. This paper identifies the fragile solid waste management capacity of the Municipalities of Bangladesh and argues that current practice is nothing but an inevitable setback for the country to achieve sustainable development

A review on chlorination of harvested rainwater

The supply of safe drinking water to rural communities has always been challenging, unlike in most large cities where government authorities have constructed central water supply systems. In many rural areas, primary water sources such as surface water and groundwater are at risk of contamination with rapid agricultural and industrial growth and climate change-related issues. Rainwater harvesting is an ancient practice for rural communities, and the momentum around its use is continually growing in recent years. However, the lack of sustainable treatment facilities on a small scale encourages dwellers to consume harvested rainwater (HRW) without any treatment even though drinking untreated HRW may have multiple health impacts in many cases. There are several methods of treating HRW. While chlorination is extensively used to disinfect water in large volumes, e.g., central drinking water supply systems), it has not been widely adopted for treating water on a small scale. We present a scoping review to explore whether chlorination could be a viable option for disinfecting HRW at a domestic level. It is found that inadequate treatment prior to chlorine disinfection could produce chlorine disinfection byproducts (DBPs). Limited data on DBP concentrations in HRW are available to assess its health implications. Based on this review, it is argued that chlorination could be an option for treating HRW at a domestic level when limitations associated with this method (such as safe storage, appropriate sustainable technology, and lessening DBPs by lowering total organic carbon before chlorination through other treatment methods) are resolved

Assessing advertisement impact on consumers’ attitude: young consumers’ perspective

To attract a substantial amount of young consumers’ towards the fast food restaurant in recent time companies in Bangladesh are facing numerous challenges with spending huge amount of the budget every year on advertising to promote their products to influence consumers’ positive attitudes towards their store. Since there is a significant research gap exists in fast food restaurant’s consumers’ particularly Bangladeshi young consumers’ perspective. The goal of this research is to explore the young consumers’ attitude towards fast food restaurant’s advertisement under three types of advertising practices (Print; Electronic and Online). This research used a self-administered questionnaire on a sample of 350 young consumers aged between 14 and 25 years. Data were analyzed using exploratory factor analysis and multiple regressions. The result of the research shows that young consumers’ are significantly influenced by television advertisement. The findings suggested significant implications that will help fast food restaurants’ formulate better advertisements. For instance, managers can change their slogans based on the current situations which will assist them to create suitable advertising for their targeted customers. KEYWORDS: Consumer Attitude, Print Advertising, Television Advertisement, Internet Advertising, Young Consumers, Fast Food Restaurants, Bangladesh, Developing Country, Consumption Behavior