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Volume 6 ~ Issue 11 (December 2016)


Research Article  open access
Effect of Various External and Internal Factors on the Carrier Mobility in n-InSe
A.Sh.Abdinov || R.F.Babayeva|| N.A.Ragimova ||, E.A.Rasulov|| S.I.Amirova
Azerbaijan
Research Inventy: International Journal of Engineering & Science , Volume 6 ~ Issue 11 (December 2016)

Paper Index :: : 07.4721/xxxxxxx

Abstract

The effect of various external (temperature, electric field, light) and intracrystalline (doping, initial resistivity) factors on the mobility of carriers in layered n-InSe semiconductor experimentally have been investigated. Scientific explanations of the results are proposed.

KEY WORD: charge carriers, electrophysical parameters, electronic properties, impurity, mobility, Hall
coefficient, drift barrier.


Research Article  open access
Removal of Chromium (VI) From Aqueous Solutions Using Discarded Solanum Tuberosum as Adsorbent
Pushpendra Kumar Sharma|| Sohail Ayub|| Chandra Nath Tripathi|| Somesh Ajnavi
India
Research Inventy: International Journal of Engineering & Science , Volume 6 ~ Issue 11 (December 2016)

Paper Index :: : 07.4721/xxxxxxx

Abstract

Industrial polluting effluents containing heavy metals are of serious environmental concern in India. Chromium is frequently used in industries like electroplating, metal finishing, cooling towers, dyes, paints, anodizing and leather tanning and is found as traces in effluents finding their way to natural water bodies causing hazardous toxicity to the health of humans, animals and aquatic lives directly or indirectly. Many methods for the removal of Chromium such as chemical reduction, precipitation, ion exchange, electrochemical reduction, evaporation, reverse osmosis and adsorption using activated carbon etc. have been reported but all being expensive and complicated to operate. Experimental practices reveal that adsorption by agricultural and horticultural wastes are quite simple, inexpensive and efficient method. Agra is famous for Potato farming, a lot of discarded potato waste from cold storages is thrown along road side drains causing solid waste generated which either creates solid waste disposal problem or otherwise it finds way to Yamuna river resulting high BOD and posing a serious threat to the aquatic environment. For developing countries like India adsorption studies using discarded potato (Solanum tuberosum) waste from cold storages (DPWC) a solid waste as low cost adsorbent for Chromium removal was dual beneficial i.e., an ideal solution to these solid wastes disposal problem of Agra and removal of Chromium from tannery effluents and thereby saving aquatic life from Chromium contamination in Yamuna river. Keeping this in view batch experiments were designed to study the feasibility of discarded potato waste from cold storages to remove chromium (VI) from the aqueous solutions. During the study various affecting parameters, such as pH, adsorbent does, initial concentration, temperature, contact time, adsorbent grain size and start up agitation speed were optimized as 5.0, 10-20 g/l, 50 mg/l, 250C, 135 minutes, average size and 80 rpm respectively on chromium removal efficiency. Various Isotherms such as Langmuir, Freundlich, Tempkin also fitted suitably and various corresponding constants determined from these Isotherms favor and support the adsorption. Thermodynamic constants ΔG, ΔH and ΔS were found to be 0.267 KJ/mole, 0.288 KJ/mole and 0.0013 KJ/mole respectively.

KEY WORD: Adsorbent, Toxicity, Discarded, Potato, DPWC, Disposal, Cold Storage and BOD.


Research Article  open access
Size distribution and biometric relationships of little tunny Euthynnus alletteratus from the Algerian coast
N. Labidi-Neghli || L.Neghli || S. OUADAH || A. Nouar
Algeria
Research Inventy: International Journal of Engineering & Science , Volume 6 ~ Issue 11 (December 2016)

Paper Index :: : 07.4721/xxxxxxx

Abstract

This study is taken from data of commercial fishing of the little tunny, Euthynnus alletteratus (Rafinesque, 1810) caught in the Algerian coast, sampled between november 2011 and april 2016. Data were collected in order to determine size distributions of the population and biometric relationships of species including the size - weight relationships. A total of 601 fish ranged from 30.9 and 103 cm fork length (FL) were observed. The size distribution of Euthynnus alletteratus shows multiple modal values witch the most important cohort corresponds to the age class 2 (42-46 cm). The value of the allometric coefficient (b) of the FL/TW relationship is lower than 3, indicating a negative allometric growth

KEY WORD: Little tunny, Euthynnus alletteratus, commercial fishing, Algerian coast, size distribution, biometric relationships.


Research Article  open access
The Management of Protected Areas in Serengeti Ecosystem: A Case Study of Ikorongo and Grumeti Game Reserves (IGGRs)
Zella, Adili .Y
Tanzania
Research Inventy: International Journal of Engineering & Science , Volume 6 ~ Issue 11 (December 2016)

Paper Index :: : 07.4721/xxxxxxx

Abstract

The study assessed the management of protected areas in Serengeti ecosystem using the case of IGGRs. Specifically, the study aimed at identifying the strategies used for natural resources management; examining the impacts of those strategies; examining the hindrances of the identified strategies; and lastly, examining the methods for scaling up the performance of strategies used for natural resources in the study area. The study involved two villages among 31 villages bordering IGGRs where in each village; at least 5% of the households were sampled. Both Primary data and secondary data were collected and analyzed both manually and computer by using SPSS software. The study revealed that, study population ranked IGGRs performance on protection of natural resources, especially on conserving wildlife for future generation and in reducing poaching to be good(53.3%). In addition, the relationship with IGGRs was said to be considerable good (46.7%). In the aspect of reducing poaching, the findings show that poaching has been reduced by 96.2% from 2009 to 2012. Furthermore, 81.4% of respondents said they use different strategies to control loss of natural resources which in turn has considerably improved the relationship between protected areas and the surrounding communities in some of the aspects. Despite of above successes, the study findings has revealed a number of challenges that hinders the full attainment of conservation objectives. Among the challenges are loss of life and properties (86.4%), shortage of water for livestock (68.9%) since water sources such as Grumeti and Rubana rivers are within protected area while the adjacent local communities do not have a free access to those water sources. Other challenges especially on the IGGRs management include insufficient fund base, working facilities and inadequate staffs. Based on the above findings, the study concluded that the strategies used for natural resources management of protected areas in Serengeti ecosystem is fairly sustainable and need functional participatory approaches of local people and other stakeholders in order to bring about a collaborative natural resources management network in the ecosystem. Furthermore, based on the findings above, equity in benefit sharing accrued from natural resource management in protected areas, more financial support to IGGRs and local community, the use of non-lethal deterrents for crop protection, integration of crop-livestock production systems, adoption of land use plans as a solution to land conflicts, strengthens of community based conservation (CBC), adoption of modern information technology such as geographical information system (GIS) and remote sensing are recommended.

KEY WORD: Protected areas management (PAs), Wildlife conservation, Serengeti ecosystem.



































































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