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Volume 5 Issue 6 (June 2018)

S.No. Title & Authors Page No View
1

Title : Existence of Positive Solutions for fourth-order Differential Equations with indeterminate weights

Authors : Jiao Wang

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Abstract :

In this paper, the existence of positive solutions of fourth-order differential equations with indeterminate weights is considered as follow.

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2

Title : The Darkness of Dark Matter and Dark Energy

Authors : Dipak Nath

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Abstract :

The visible universe—including Earth, the sun, other stars, and galaxies—is made of protons, neutrons, and electrons bundled together into atoms. Perhaps one of the most surprising discoveries of the 20th century was that this ordinary, or baryonic, matter makes up less than 5 percent of the mass of the universe. The rest of the universe appears to be made of a mysterious, invisible substance called dark matter (25 percent) and a force that repels gravity known as dark energy (70 percent).Cosmological observations provide compelling evidence that about 95 percent of the content of the universe reside in two unknown forms of energy, which we call dark matter and dark energy-the first resides in bound objects in the form of non-luminous matter, the later in the form of  a zero point energy that pervades the whole universe. In this article I shall try to explore the essentials of dark matter and dark energy, with particular emphasis on the experimental evidence.

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3

Title : Optimal Investment and Optimal Reinsurance

Authors : Yuedi Liu

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Abstract :

In this paper, Aiming at the delay claim risk model, the optimal investment and optimal reinsurance strategy which makes the expected index utility maximum of the final wealth are studied under the principle of variance premium principle. Firstly, when the optimal reinsurance is in the form of proportional reinsurance, we use diffusion approximation to approximate the claim process of insurance companies. then, we use the dynamic programming principle to solve the Hamilton-Jacobi-Bellman equation. Finally, we obtain the explicit optimal strategy and the value function.

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4

Title : Investigation of Seismic Base Isolated Structures for Long Period Ground Motions

Authors : Azer A. Kasımzade, Obaidullah Abrar, Sertaç Tuhta, Gencay Atmaca

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Abstract :

In this research lead core rubber bearing (LCRB) seismic isolator is designed such that the available period (4secs) of it is increased to (6secs), low period important structures (hospital, school, and similar structures) equipped with this type isolator has exhibited safer behavior at least around extremum range of the strong and long period earthquake excitations and proposed for related applications. The LCRB6 seismic isolation system and the hospital building resting on isolation system has been modeled in LS-DYNA finite element software and analyzed using various strong and long period ground motions, related response results of the structure have been presented.

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5

Title : Privacy Preserving Ranked Multi-Keyword Search for Multiple Data Owners in SaaS Cloud Computing

Authors : Sudhirkumar T Khelkar, Prof. Harish K. Barapatre

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Abstract :

The innovation in cloud computing has encouraged the data owners to outsource their data managing system from local sites to profitable public cloud to increase affordability of services. But people can like full benefit of cloud computing, if we are able to report very real secrecy and security concerns that come with loading sensitive personal information then we have to increase security, privacy. In view of the huge number of data users, documents in the cloud, it is important for the search facility to agree multi keywords query and arrange for result comparison ranking to meet the actual need of data recovery search and not regularly distinguish the search results. Related mechanisms on searchable encryption emphasis on single keyword search or Boolean keyword search, and often sort the search outcomes. In our system, we explain and solve the interesting problem of privacy preserving multi keywords ranked search over encrypted cloud data, and create a set of strict privacy necessities for such a safe cloud data application system to be effected in real. We can add Document owner accounts, Cloud Server account, Admin account and grant permission to various privileges to different user.

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6

Title : Analysis of Deflection of a Fixed Ridge Beam due to Pressure Applied on the Beam

Authors : D.S.Rodrigo, H.M.N.Sewwandi

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Abstract :

The roof is a major component in building and housing construction and also it is the identity of the building or house. This study is focused on kingpost and beam joinery in gable roof types that commonly used in hotel entrances, cabanas, summerhouses, greenhouses and assembly halls in temples. For this study, the simplest structure of king post which is the structure that only the kingpost connects to the horizontal beam is used and mortise and tenon joinery is used to connect beam and king posts; the kingpost is used as a mortise element and beam is used as a tenon element. Therefore the ridge beam is a fixed which is supported at both free ends and is restrained against rotation and vertical movement. The study is considered the jack wood beam which has the length 198 inches (16.5 feet= 5.03m), 11 jack wood rafters that have the length 144 inches (12 feet) and two jack wood kingpost trusses that have kingposts with the length 44 inches (3.8 feet). Generally, carpenters in Sri Lanka use 8-11 feet as the range of standard distance between king post trusses. In this study, an attempt will be made to investigate the deformation of a ridge beam of under pressure exerted by rafters, tiles and kingpost trusses and from that to detect the optimum distance between kingpost trusses that can be used to design the king post beam joinery more effective way. Euler-Bernoulli Beam theory and Fourier series were the mathematical tools, which was used in the study. The shape of a deflected beam can be described by the Euler-Bernoulli Differential Equation. The results showed that the minimum deflection values have occurred at the standard range that used by carpenters. By examined those results, the optimum range for distance between kingpost trusses is 8-11 feet and when considering this range minimum deflection values have occurred around 9 - 9.5 feet. The results obtained from this study can be used to design the king post beam joinery more effective way.

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