Md. Mortuza Habib , Ruddro Roy , Md. Mojidul Islam , Mehedi Hassan , Md. Muztahidul Islam , Md. Biplob Hossain (2019). Study of Graphene-MoS2 Based SPR Biosensor with Graphene Based SPR Biosensor: Comparative Approach. International Journal of Natural Sciences Research, 7(1): 1-9. DOI: 10.18488/journal.63.2019.71.1.9
In this paper, we compare the sensitivity of graphene-MoS2 based surface plasmon resonance (SPR) biosensor to graphene based SPR biosensor. Here, graphene is used as biomolecular recognition element (BRE) because of its high adsorption ability and optical characteristics which helps to improve sensor sensitivity, on the other hand MoS2 is used for it has larger band gap, high fluroscence quenching ability, higher optical absorption efficiency which improves further sensor sensitivity. In DNA hybridization event, numerically achieved results show that single layer of graphene-MoS2 based SPR biosensor is 175% more sensitive than single layer of graphene coated SPR biosensor. Surface plasmon resonance angle and spectrum of reflected power are numerically investigated for different concentrated complementary DNA strands. The variations of SPR angle is significantly computable for complementary DNA strands whereas these parameters are varied negligibly for mismatched DNA strands. Thus the proposed sensor effectively differentiates hybridization and single nucleotide polymorphisms (SNP) by examining the level of changes in SPR angle and reflected power spectrum.
This study is one of very few studies which have investigated numerically the performance parameters in terms of sensitivity with adding only graphene and other hand adding graphene with MoS2 layers based surface plasmon resonance biosensor.
Green Transformation and its Application on Shipping Service Complex
Xuefeng Wang , Mingyang Wang , Pengcheng Wu , Tianrong Huang , Huixian Jiang (2019). Green Transformation and its Application on Shipping Service Complex. International Journal of Natural Sciences Research, 7(1): 10-21. DOI: 10.18488/journal.63.2019.71.10.21
This article is written under the context of old construction Shanghai Shipping Service Complex (SSC) around the port. These buildings are too old to keep pace with the development and urgent to be upgraded. This article generally introduced the green transformation methods and application on the existing buildings in the urban old port district. In order to facilitate the green transformation of the SSC, we carried out an investigation upon the construction, structure design, specific building materials and interior decoration of the original building to form a general understanding. By combining its location features and functional orientation, the optimal transformation scheme was completed through the comparison of the building projects, structural analysis, and energy-saving transformation program. Meanwhile, the effect of the preliminary scheme was tested via energy-saving calculation, computer simulation and field testing. A third party was introduced to certificate the technological application to prove the safety and reliability of the scheme.
This paper’s primary contribution is finding the detailed process of upgrading the old port district. It’s necessary for people to see the whole big picture while making a building scheme. Meanwhile, never forget the environmental conservation factors.
Geo-Portal Implementation with a Combined Approach of AHP and SWOT
Zahra Mousavi , Saeed Behzadi (2019). Geo-Portal Implementation with a Combined Approach of AHP and SWOT. International Journal of Natural Sciences Research, 7(1): 22-31. DOI: 10.18488/journal.63.2019.71.22.31
In order to achieve the goals of sustainable development, reliable and more quality spatial data is required in the decision-making and planning process. In other words, the existence of an appropriate infrastructure of spatial data is necessary for the sustainable development of the community. Recently, the creation of a Spatial Data Infrastructure (SDI) is in the program of many states at various national, provincial and local levels. SDI can be defined from a variety of perspectives; however, the geoportal design and implementation play a key role as a platform for providing spatial services. In this regard, various software exists as a geoportal platform, which is a necessity to choose an appropriate software tool among them. To achieve this goal, a set of related software products should be investigated and compared. Then, the criteria that are important from the perspective of the user and the developer are selected for software comparison, and ultimately software packages which support SDI (for geo-portal) are selected. In this regard, attempts to select one software with emphasis on environmental activities among four open source software for geo-portal implementation. In this article, the combination of AHP and SWOT is used to achieve this goal with an emphasis on environmental activities. Therefore, the criteria are first weighed using the AHP method, then, the SWOT method is used to select the appropriate software based on identifying strengths, weaknesses, opportunities, and threats.
This study contributes to the existing literature that helps organization to choose the best software according to their internal and external factor which exist in their factory. This study uses new estimation methodology for choosing the best open source software for geoportal. Different organs can use it according to the criteria that important for choosing the best software and implementation of geoportal.
Introducing an Appropriate Geoportal Structure for Managing Wildlife Location Data
Zahra Mousavi , Saeed Behzadi (2019). Introducing an Appropriate Geoportal Structure for Managing Wildlife Location Data. International Journal of Natural Sciences Research, 7(1): 32-48. DOI: 10.18488/journal.63.2019.71.32.48
In recent years, access to spatial data, and also exchange them to achieve sustainable development in the country has been more and more in attention. Because with these spatial data and awareness of their existence, re-work and reproduction of data, the cost of time, and the cost to produce data are prevented. Environmental spatial data is one of the most important data that is very useful for planning and management. In this paper, we tried to show how to collect spatial information that is distributed in different organizations and databases, then we can provide this spatial information through geo-portal services based on managing wildlife. Knowing about the existence of such data and the ability to search and access them with a spatial geoportal, the user can have an important role in spatial data infrastructure. In addition, the user can make a decision that formed on environmental protection. Users can also search and access their spatial environment information with a geoportal if they exist. In addition, they will use spatial services of the layers. The spatial data is created in the form of standard spatial services, and is located in geo-portal to search and access to these layers. As a result, other organs can use these services or spatial data if necessary.