304 research outputs found
Shafiul Alam Group Ltd. (SAS)
No full textThis internship report is submitted in a partial fulfillment of the requirements for the degree of Bachelor of Business Administration,2014.Cataloged from PDF version of Internship report.Includes bibliographical references (page 23- 24).While preparing this report I gained first-hand knowledge about the Steel industry and was confronted for the first time with the commercial world. Besides I learnt how to work under pressure and cooperate in a team. SAS Group which was started small in 1987 in Comilla, has made its way around the country ranging from Billet to unique steel bars special in Bangladesh. What started because of the lack of cash capital ended up in an asset which worth around Tk. 800 crore. This eventually led to bigger popularity and connections to wealthier customers. Overpriced products however along with the increased number of companies offering branded steel bars is eventually becoming a threat to SAS’s share in the market. Still so, SAS manages to attract its clients through promised quality, reasonable discounts for cash purchases and long term relationship of value and bonding. And not to forget, SAS is sustained through recession phase because of its advanced technology, unique product and service towards customer by creating a bond which is to be forever. Lack of advertising activities is the weakness of this company. But they are currently planning something big. The past 3 years and 8 months was something unforgettable to me due to the bonding with some people with extremely beautiful heart and their help in this entire period can’t be paid in return. The work pressure was a lot, but what delights me is the valuable learning, which I believe will work as competitive advantages for me.Saki RezwanaB. Business Administratio
Parasit Vectors
No full textBackgroundDiseases caused by mosquito-borne pathogens remain an important source of morbidity and mortality in Bangladesh. To better control the vectors that transmit the agents of disease, and hence the diseases they cause, and to appreciate the diversity of the family Culicidae, it is important to have an up-to-date list of the species present in the country. Original records were collected from a literature review to compile a list of the species recorded in Bangladesh.ResultsRecords for 123 species were collected, although some species had only a single record. This is an increase of ten species over the most recent complete list, compiled nearly 30\ua0years ago. Collection records of three additional species are included here: Anopheles pseudowillmori, Armigeres malayi and Mimomyia luzonensis.ConclusionsWhile this work constitutes the most complete list of mosquito species collected in Bangladesh, further work is needed to refine this list and understand the distributions of those species within the country. Improved morphological and molecular methods of identification will allow the refinement of this list in years to come.20162016-10-22T00:00:00Z27770829PMC5075421690
Preparation of hemp fibres for advanced bio-composite applications
No full textSO2-ethanol-water (SEW) pulping has been introduced as a possible means of separating hemp technical fibres (fibre bundies) into fibre cultivates (single fibre). Results about both the chemical and physical behaviour of SEW treated hemp fibres are presented. This study was carried out with respect to conditions of pulping time, temperature and SO2 concentration. The experiments were carried out at the input level of SO2 concentrations of 4, 8 and 12 % and 55 % (vol.) ethanol/H2O at temperatures of 115°C to 145°C and pulping times from 10 minutes to 90 minutes. As a part of this study, the fibre separation process was evaluated from the result of dry matter contents, yield, viscosity and microscopy. Treated fibres at lower temperature show higher yield (%) but at higher SO2 concentrations showed lower yield (%). The viscosity of the SEW treated fibre is decreased with an increase of treatment time and temperature which is also same for higher SO2 concentrations. It was also observed from the optical micrographs that increased cooking time and temperature made the fibre separation process more effective.
SEW treated fibre shows higher elastic modulus but most of the sample shows lower tensile strength than untreated fibre. There is a correlation between viscosity and tensile strength, i.e. tensile strength increases with increasing viscosity.
The mechanical properties of epoxy-hemp composites were investigated. The tensile strength of SEW treated hemp-epoxy composites were increased due to the removal of debris, fibre separation and surface roughness of treated fibre compared to the untreated fibre
Combustion synthesis of molybdenum silicides and borosilicides for ultrahigh-temperature structural applications
No full textMolybdenum silicides and borosilicides are promising structural materials for gas-turbine power plants. A major challenge, however, is to simultaneously achieve high oxidation resistance and acceptable mechanical properties at high temperatures. For example, molybdenum disilicide (MoSi2) has excellent oxidation resistance and poor mechanical properties, while Mo-rich silicides such as Mo5Si3 (called T 1) have much better mechanical properties but poor oxidation resistance. One approach is based on the fabrication of MoSi2−T 1 composites that combine high oxidation resistance of MoSi2 and good mechanical properties of T1. Another approach involves the addition of boron to Mo-rich silicides for improving their oxidation resistance through the formation of a borosilicate surface layer. In particular, Mo 5SiB2 (called T2) phase is considered as an attractive material. In the thesis, MoSi2−T1 composites and materials based on T2 phase are obtained by mechanically activated SHS. Use of SHS compaction (quasi-isostatic pressing) significantly improves oxidation resistance of the obtained MoSi2−T1 composites. Combustion of Mo−Si−B mixtures for the formation of T2 phase becomes possible if the composition is designed for the addition of more exothermic reactions leading to the formation of molybdenum boride. These mixtures exhibit spin combustion, the characteristics of which are in good agreement with the spin combustion theory. Oxidation resistance of the obtained Mo−Si−B materials is independent on the concentration of Mo phase in the products so that the materials with a higher Mo content are preferable because of better mechanical properties. Also, T2 phase has been obtained by the chemical oven combustion synthesis technique
The Fundamental Principles of Islamic Political System: A Brief Overview
No full textThe political aspect is one of the most important parts of human life, while not being the whole of it. We (the Muslims) consciously believe that Islam views our life as a compact whole and does not divide it into many separate and conflicting parts. Islam as a complete code of life has given solution to all problems of our individual, social, economic, political and global lives. It has laid down some principles of our political affairs. This paper is an attempt to identify the actual relation between Islam and Politics. The Article is also a short brief about how this relation makes politics acceptable in the view point of Islam and how it proves Islam as a complete code of humanity
Propagation of Surface Plasmon Polaritons in Hybrid Waveguide with Metal Cap and Graphene Layer
No full textPest Manag Sci
No full textBACKGROUND:With no effective drugs or widely available vaccines, dengue control in Bangladesh is dependent on targeting the primary vector Aedes aegypti with insecticides and larval source management. Despite these interventions, the dengue burden is increasing in Bangladesh, and the country experienced its worst outbreak in 2019 with 101 354 hospitalized cases. This may be partially facilitated by the presence of intense insecticide resistance in vector populations. Here, we describe the intensity and mechanisms of resistance to insecticides commonly deployed against Ae. aegypti in Dhaka, Bangladesh.RESULTS:Dhaka Ae. aegypti colonies exhibited high-intensity resistance to pyrethroids. Using CDC bottle assays, we recorded 2\u201324% mortality (recorded at 24 h) to permethrin and 48\u201394% mortality to deltamethrin, at 10
7 the diagnostic dose. Bioassays conducted using insecticide\u2013synergist combinations suggested that metabolic mechanisms were contributing to pyrethroid resistance, specifically multi-function oxidases, esterases, and glutathione S-transferases. In addition, kdr alleles were detected, with a high frequency (78\u201398%) of homozygotes for the V1016G mutation. A large proportion ( 64 74%) of free-flying and resting mosquitoes from Dhaka colonies survived exposure to standard applications of pyrethroid aerosols in an experimental free-flight room. Although that exposure affected the immediate host-seeking behavior of Ae. aegypti, the effect was transient in surviving mosquitoes.CONCLUSION:The intense resistance characterized in this study is likely compromising the operational effectiveness of pyrethroids against Ae. aegypti in Dhaka. Switching to alternative chemical classes may offer a medium-term solution, but ultimately a more sustainable and effective approach to controlling dengue vectors is required
Hybridization of Evolutionary and Swarm Intelligence Algorithms for improved performance
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