Dengue Protection and Cure: Bangladesh Perspective
Abdul Kader Mohiuddin
EUROPEAN J SUSTAINAB DEV, Volume 4, Issue 1, Article No: em0104
https://doi.org/10.29333/ejosdr/6260
Editorial
[Abstract]
[PDF]
[References]
ABSTRACT
Dengue Protection and Cure: Bangladesh Perspective
Keywords:
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Solid Catalyzed Reaction of Jatropha Curcas Seed Oil with Methanol
Thelma Ejiro Akhihiero
EUROPEAN J SUSTAINAB DEV, Volume 4, Issue 1, Article No: em0105
https://doi.org/10.29333/ejosdr/6263
Research Article
[Abstract]
[PDF]
[References]
ABSTRACT
Production of biodiesel by transesterification method from renewable feedstock has come to stay. Biodiesel usage in internal combustion engines is gradually gaining ground due to its ability to produce less carbon (iv) oxide gas than fossil diesel during combustion. The production of less carbon (iv) oxide fumes will help to reduce environmental pollution that causes climate change. Jatropha curcas seed oil is a viable renewable feedstock for biodiesel production. Transesterification of Jatropha curcas seed oil with methanol using solid calcium oxide as catalyst was carried out. The free fatty acid of the oil used was 1.4%, while the molar ratio of methanol to oil, reaction temperature and time were 8:1, 65 °C, and 1hour respectively. The biodiesel produced was analyzed with gas chromatography mass spectrophotometer and the methyl ester content was 87.25%. The fuel properties of the biodiesel produced in a reaction time of about 1 hour 30 minutes are within the range of the values given by ASTM D6751 standard.
Keywords: Jatropha curcas, catalyst, biodiesel, methanol, trans-esterification
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A Conceptual Design of Energy Harvest from Roadside Trees of a Highway
Minhajul Haque Minar, Md. Shawon Rana, Sahriar Rahman Tanvir, Dewan Hasan Ahmed
EUROPEAN J SUSTAINAB DEV, Volume 4, Issue 1, Article No: em0106
https://doi.org/10.29333/ejosdr/6264
Research Article
[Abstract]
[PDF]
[References]
ABSTRACT
An experimental setup is constructed to harvest energy from wind by means of oscillating of a body, structure or even trees. A vertical stem which can oscillate or bend is connected with a rack and pinion and finally pinion is connected with generator to harvest the electrical energy. Once the force is applied on the top of the stem, the connecting wire pulls the rack and pinion is in rotary motion and generates the power. The experiments are carried out for both applied static force and wind assist dynamic force. The experimental results show that the forces exerted on the stem are very much influenced by the stem height, the rack length for power generation. The results from wind assist experiments reveals that the sail size and the materials of both stem and sails play vital role on power generation. The constructed setup shows a good prospect on power generation from wind specially the places like highways, urban areas or any other places where the tree or any other object or structure oscillate.
Keywords: energy harvesting, oscillating body, wind energy, flexural strength, flexible body
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A Teaching Module for Engineers on Robotic Safety: Approaches and Effectiveness
Marc A. Rosen, Dan Zhang
EUROPEAN J SUSTAINAB DEV, Volume 4, Issue 1, Article No: em0107
https://doi.org/10.29333/ejosdr/6295
Research Article
[Abstract]
[PDF]
[References]
ABSTRACT
A teaching module recently developed by the authors for engineers on robotic safety using various approaches (Powerpoint presentation and written document) is described and an assessment of the effectiveness of using the module is presented. The effectiveness of the teaching module and its different approaches is assessed by using it in a class setting, and surveying the opinions of the students. The content delivery approaches and learning approaches are also assessed, based on student opinions. The teaching module is determined to be effective at promoting student learning on robotics safety, and to offer multiple useful delivery modes. The teaching module thus allows students with different learning preferences to exploit the delivery mode the find most suitable.
Keywords: teaching module, teaching effectiveness, robotics, safety
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The Role of Land Speculators around the Urban Edge of Shashemene City, Ethiopia
Bedane Shata Gemeda, Berhanu Girma Abebe, Giuseppe T. Cirella
EUROPEAN J SUSTAINAB DEV, Volume 4, Issue 1, Article No: em0108
https://doi.org/10.29333/ejosdr/6296
Research Article
[Abstract]
[PDF]
[References]
ABSTRACT
The high demand for land provides land speculators the opportunity to hold land in anticipation of a price increase over time. Although the objective of the 1993 Land Use Statement was to test extra land speculation, the announcement has only been successful in fueling it. This study examines the role of land speculators around the outer edge of Shashemene’s metropolitan area. Primary data for this study was collected through a questionnaire with 73 respondents who were sampled using snowball sampling techniques. The chief findings of this study reveal that land speculation is still practiced in the study area, and the respondents affirmed that land speculators engaged in land speculation mostly for economic benefits.
Keywords: taxation, snowballing techniques, land speculation, Ethiopia
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