bluuebunny/crossref_metadata_2025_split huggingface dataset:
Science in children’s stories for elementary school
Authors: Apriliya S , Sunendar D , Mulyati Y , Sumiyadi S 
Published: October 2019

Abstract
Science is one of important subjects for elementary school students. It will be very pleasant for students if the science is presented in an interesting form. One of them is through children’s stories. This study aims to explain the content of science in Indonesian children’s stories. The data source of this study is 56 stories of children at the national level competition from 2011-2014. The research data was obtained by repetitive reading techniques, notes, and classifying text (words, phrases, and sentences) based on the category of science. Results showed that there is science content in several children’s stories. However, the science texts presented are not based on scientific knowledge, but are based on observations in everyday life. In addition, the scientific content presented in the story is not entirely in accordance with the science curriculum in the elementary schools. The implication is that teachers can use science content in children’s stories as an alternative to attract elementary school students to enjoy science.
ICT training curriculum for primary school teachers
Authors: Syahid A A , Isrokatun I , Nugraha D 
Published: October 2019

Abstract
The advancement of this modern day has required primary school teachers to utilize Information and Communication Technology (ICT) devices in the classroom. Therefore, it is imperative that teachers possess the skills to use ICT. Several studies have shown that teaching process (instruction) using ICT provides more optimal result for the students. This paper will discuss the result of a study aiming to develop an ICT training curriculum for professional teachers. The data for this study has been collected since 2017 to 2018 through surveys to explain need analysis of ICT skill for teaching. The product of this study is a curriculum structure in the form of training materials that primary school teachers need to improve their skills in utilizing ICT in teaching activities. This training curriculum is expected to lead to an effective training because it is developed based on teachers’ needs in implementing ICT in primary school.
A Comparison of Central composite design and Modified Taguchi approach to optimize the process parameters
Authors: Kumar G Charan , Rajyalakshmi K. 
Published: October 2019

Abstract
Second order rotatable design (SORD) concepts will be more useful in developing the appropriate empirical relations. As the number of input variables are increasing (with the assigned levels to each variable), there is a need to conduct more number of experiments which may sometimes be practically impossible. Taguchi designs can solve the problem with less number of experiments and provides complete information useful for the applications of second order rotatable designs. This article provides a comparison of Central composite design and modified Taguchi approach and its validation by tracing the optimum process parameter on the experimental design. It is possible to get the required information and the expected range of process parameters from modified Taguchi design.
Variable mesh non polynomial spline method for singular perturbation problems exhibiting twin layers
Authors: Phaneendra K , Emineni Siva Prasad 
Published: October 2019

Abstract
In this paper, we descend a variable mesh finite difference scheme based on non polynomial spline approximation for the solution of singular perturbation problems with twin boundary layers. We develop the discretization equation for the problem using the condition of continuity for the first order derivatives of the variable mesh non polynomial spline at the interior nodes. The discrete invariant imbedding algorithm is utilized to solve the tridiagonal system obtained by the method. Endeavor examples are illustrated and maximum absolute errors in comparison to the other methods in the literature are shown to vindicate the method.
Countably many positive solutions for a coupled system of fractional order BVPS
Authors: Prasad K.R. , Rashmita M. 
Published: October 2019

Abstract
In this paper we establish the existence of countably infinitely many positive solutions for coupled system of two point Riemann-Liouville integral fractional order boundary value problems. The main results are established by using the fixed point index theory in cone on a Banach space with increasing homeomorphism and positive homomorphism.
Analysis of a M/M/1 Queueing System with Two-Phase, N-Policy, Server Failure and Second Optional Batch Service with Customers impatient behaviour
Authors: Devi V N Rama , AnkammaRao A , Chandan K 
Published: October 2019

Abstract
In this paper an M/M/1 queueing system with server vacation, Startup, breakdowns and second optional service with impatient customer behavior is considered. All the customers will be given unique type of individual service in the first phase and then second phase service will be provided on option of the customer. We obtain some important system characteristics, such as the number of customers in the system, the probability that the server is idle, busy and broken down states, the expected waiting time in the system. Sensitivity analysis is also conducted with various parameters on system’s performance measures.
Efficient Identity-based Signature Scheme with Message Recovery
Authors: James Salome , Reddy P Vasudeva 
Published: October 2019

Abstract
Digital signature is one of the important primitive of public-key cryptography and has become an essential technique in providing security services in modern communications. Due to the limitations imposed by both the communication bandwidth and computational power of wireless communication devices, signature schemes with less bandwidth and less computational cost are desirable for practical applications. Signature schemes with message recovery provide a feature that the message is recoverable from the signature and hence does not need to be transmitted separately for signature verification. Recently many signature schemes with message recovery have been designed in traditional as well as Identity based settings and most of the schemes are constructed using bilinear pairings over elliptic curves. Nevertheless, the computational cost of a pairing is more expensive and is higher than the scalar multiplication. Thus, signature schemes without pairing would be more appealing in terms of efficiency. In this paper, we propose an efficient identity-based message recovery scheme without pairings. In our scheme the message itself is not required to be transmitted together with the signature and so it turns out to have the least data size of communication cost. Also, we compare our scheme with the existing ID-based signature schemes with message recovery in terms of computational and communicational point of view. With the pairing-free realization, the proposed scheme is efficient and applicable for resource constrained devices.
Coding theory on Pell-Lucas p numbers
Authors: Sundarayya P. , Prasad M.G. Vara 
Published: October 2019

Abstract

In this paper, we developed a new coding and decoding method followed from Pell-Lucas p numbers SpAn. We established the relations among the code matrix elements for p = 1 and i=1, error detection and correction for this coding theory. Correction ability of this method is 93.33% for p = 1,i=1 and for p = 2,i=2 the correction ability is 99.80%. In general, correction ability of this method increases as pincreases.
Analysis of a Markovian queueing system with single working vacation and impatience of customers
Authors: Laxmi P. Vijaya , Kassahun T. W. , Bhavani E. Girija 
Published: October 2019

Abstract
In this paper, we study an infinite capacity single server Markovian queue with a single working vacation and reneging of impatient customers in the queue during working vacation period. Customers arrive to the system following a Poisson distribution. The server goes to vacation when the system is empty and stay in vacation for a random period of time that is exponentially distributed. During the working vacation period, the server still continue providing service with a slow service rate. After the completion of the vacation, the server returns back to the regular service period and continue providing service with the regular busy period service rate if there are one or more customers in the system or it will stay idle until a new customer arrives to the system. During working vacation, customers in the queue get impatient and renege from the system and the reneging time is assumed to follow an exponential distribution. The system is modeled as a quasi-birth-death process and the stationary probabilities of the model are obtained using probability generating function approach. Some numerical analysis is also carried out to show the effect of some of the parameters on some selected performance measures of the system.
On the Operator Partial Semirings of Partial Γ-Semiring
Authors: Mala M Siva , Rao P V Srinivasa , Kumar K Kiran 
Published: October 2019

Abstract
A partial Γ-semiring is a structure possessing an infinitary partial addition and a ternary multiplication, subject to a set of axioms. The partial functions under disjoint-domain sums and functional composition is a partial Γ-semiring. In this paper we introduce of notions of left/right operator partial semirings of a partial -semiring and obtained a correspondence between the partial ideals of partial Γ-semiring R and its operator partial semirings.
Bianchi type-II, VIII and IX perfect fluid cosmological model with domain walls in f(R, T) gravity
Authors: Rani N Sandhya , Santhi M Vijaya 
Published: October 2019

Abstract
This paper deals with the Bianchi type - II, VIII & IX metrics in presence of domain walls in the frame work of the modified f
(R,T) theory of gravitation, where R is Ricci scalar and T is the trace of energy momentum tensor. Also, some important features of the models, thus obtained, have been discussed.
Modified Holographic Ricci Dark energy Cosmological Models in f (R, T) Gravity
Authors: Sireesha K. V. S. , Rao V.U.M. 
Published: October 2019

Abstract
We have investigated spatially homogeneous anisotropic Bianchi type-II, VIII & IX cosmological models in the presence of pressure less matter and modified holographic Ricci dark energy in the frame work of f(R, T) gravity in the context of late time accelerating expansion of the universe. The solutions of the field equations obtained using (i) a relation between metric potentials and (ii) the modified holographic Ricci dark energy. We have determined the cosmological parameters, namely, EoS parameter, matter energy density, anisotropic dark energy density, deceleration parameter. We discuss some physical and geometrical properties of the obtained models which are found to be consistent with recent observation
Optimal design of looped water supply network by GA-NLP hybrid approach
Authors: Prasad A Srinivasa , Krishna K Leela 
Published: October 2019

Abstract
Any Municipal distribution system consists of pipe network, valves and pressure generating facilities etc. Around 70% of total cost of any water distribution system is towards cost of pipe network only. Therefore, the cost of pipe network is to be reduced by selecting the appropriate lengths of candidate diameter pipes between the nodes in a pipe network.
In the present study, a municipal looped water distribution network is designed for least cost by Genetic Algorithm – Non Linear Programming (GA-NLP) hybrid approach. In the present study, optimal lengths of sub pipes of various discrete diameters (sizes) available in the market making the link between the nodes are obtained by minimising the total cost of pipe network. In order to obtain the optimal solution of a looped network, non - linear hydraulic analysis and optimization of network is to be performed. In this study, non - linear hydraulic analysis is made a part of optimization by adding loop head loss and node continuity equations as constraints to the objective function. The model developed is solved by GA-NLP hybrid approach in MATLAB. Near optimal solution obtained by GA is taken as initial solution of NLP for obtaining optimal solution. By adopting GA-NLP hybrid approach, convergence is faster when compared to GA avoiding the complexity in selection of suitable trial values of GA parameters.
Many researchers applied different techniques like linear programming, integer linear programming, linear programming gradient method and branch & bound algorithm etc. and optimized the looped pipe network by minimizing the cost. The results obtained by proposed model are compared with that of other investigators and found to be superior. It is also concluded that the proposed model may be applied to any larger municipal looped pipe network through demonstration by applying proposed model to a case study of Rajiv Gandhi Nagar of Guntur Municipal Corporation.
Katowski-Sachs generalized ghost dark energy cosmological model in Saez-Ballester scalar -tensor theory
Authors: Vinutha T , Rao V U M , Bekele G 
Published: October 2019

Abstract
In this paper we have studied the Kantowski-Sachs (KS) space time filled with generalized ghost dark energy (GGDE) and dark matter in the Saez-Ballester theory of gravitation. The equation of state (EoS) parameter of dark energy (ωλ
) has been formulated as a function of cosmic time and shows quintom like behavior. The properties of density of dark energy (ρλ
) and the density of dark matter (ρm
) indicate the accelerated expansion of the universe. The pressure of the dark energy is negative at present and late time evolution of the universe indicating the accelerated expansion of our universe during these periods. The physical and geometrical aspects of the statefinder parameters (r, s), squared speed of sound

(

υ
s
2

)

and

ω
λ

−

ω
′

λ

plane are also discussed.
Five Dimensional Little Rip Cosmological Models In General Relativity
Authors: Vinutha T. , Kavya K. Sri , Kumari G. Sree Devi 
Published: October 2019

Abstract
In this paper, we have investigated flat Friedmann-Robertson-Walker type Kaluza-Klein model in the presence of ideal fluid with quadratic equation of state(EoS) with time dependent parameters ω(t) and (Λt). We have investigated the properties of ω(t) and found that for Little Rip model ω(t) = −1 and for Pseudo Rip model ω(t) <
−1. Also, we have studied behaviour of Little Rip(LR) and Pseudo Rip(PR) for dark energy. For obtained LR and PR models we have estimated the disintegration time.
Bianchi type V Ih Bulk-Viscous String Cosmological Model in f(R) Gravity
Authors: Santhi M. Vijaya , Sobhanbabu Y. , Rao B. J. M. 
Published: October 2019

Abstract
In this paper, we derive f(R) gravity field equations with the help of a spatially homogeneous and anisotropic Bianchi type-V Ih
space-time, in the presence of a bulk-viscous fluid, containing one-dimensional cosmic strings. Here we obtained the solutions of the field equations, under some specific plausible physical conditions. In particular, cosmological model with bulk-viscous strings in f(R) theory of gravity is obtained by using the special law of variation for Hubble’s parameter proposed by Berman (Nuovo Cimento, B74, 182 (1983)). Some physical and kinematical properties of the models are also discussed.
Fuzzy Kernel Based Effective Clustering Techniques in Analyzing Heterogeneous Databases
Authors: Kannan S R , Siva M , Devi R , Ramathilagam S , Last Mark 
Published: October 2019

Abstract
The aim of this paper is to introduce an effective fuzzy clustering technique based kernel function to find appropriate subgroups in heterogeneous databases. This paper introduces the effective fuzzy clustering that incorporates weighted bias field information, kernel distance, possibilistic memberships and fuzzy memberships into memberships equation and prototype equation. The effectiveness and efficiency of the proposed clustering techniques have been shown through the experimental results on benchmark heterogeneous databases.
An empirical study on shortest path for Graph clustering in Network analysis
Authors: Charan Kumar G. , Latha G. Shobha 
Published: October 2019

Abstract
Network theory deals with the study of graphs in which nodes connected by branches. It helps to determine the shortest route between two places, time schedule for the activities of a project and minimum cost flow in pipeline networks. In the present paper, we with the existing algorithms based on network theory and finding the shortest path from use the cluster algorithms to find the can be compare one to another and also shortest paths when the clusters are grouping based on cluster analysis the results which we obtain observed that the similarity levels of single, average and complete linkage methods. By applying the existing algorithms based on graph theory can analyze the shortest path from one to another where as clustering provides the shortest path as well as the similarity index for standardized and non-standardized variables.
Innovative public procurement (IPP) – Implications and potential for zero-emission neighborhood (ZEN) projects?
Authors: Hamdan Hasan A. M. , de Boer Luitzen 
Published: October 2019

Abstract
As a component of the urban fabric system, zero-emission neighborhood (ZEN) projects represent an opportunity to boost the sustainable performance of cities. However, overlooking the potential of different actors or underestimating the complexity of interactions among them may threaten the projects themselves. Public procurement is a powerful tool that potentially enables national and local authorities to achieve sustainable development goals while procuring necessary products and services. This paper aims to understand the potential of innovative public procurement (IPP) to reduce some of the project complexity in ZEN. Besides literature on sustainable neighborhoods (SN), empirical insights are drawn from an ongoing ZEN project to map the primary sources of complexity in such projects. Afterward, the potential for dialogue with suppliers is mainly discussed in light of these sources. Our findings suggest that using IPP may assist in reducing the complexity imposed on ZEN projects.
Validation of a Flexibility Assessment Methodology for Demand Response in Buildings
Authors: O’Connell S , Reynders G , Seri F , Keane M 
Published: October 2019

Abstract
Flexibility in Buildings is an integral part of the solution to address the electrical grid’s challenges of grid balancing and renewable generation hosting capacity. One of the main barriers to greater participation of commercial and residential buildings in demand response schemes is the complexity and cost associated with assessing the flexibility of buildings. To overcome these barriers, an early stage flexibility assessment methodology was developed to provide stakeholders with actionable information in a concise and relevant way, so they can effectively evaluate the flexibility of their building and negotiate with aggregators for demand response participation. This paper validates the early stage flexibility assessment methodology in multiple buildings, demonstrating its ease of implementation and scalability. The validation was conducted at five pilot sites, in different geographical regions, activating a range of flexible sources through experiments on site.
Energy performance evaluation of a nearly Zero Energy Building and the reasons for the performance gap between expected and actual building operation
Authors: Loukou Evangelia , Heiselberg Per K. , Jensen Rasmus L. , Johra Hicham 
Published: October 2019

Abstract
As energy standards focus on reducing energy use in new buildings, attention is drawn to the gap between the expected and actual building operation and energy performance. This performance gap can be associated with the building construction, its systems, its unbalanced operation, the assumptions on occupancy profiles during the design phase, or the users’ interaction with the systems’ operation and control. This work focuses on a nearly zero-energy (nZEB) single-family house located in central Denmark. The analysis of indoor environment and energy use is based on year-long data monitoring. The reasons for the deviation between the expected and actual energy use are suggested. The indoor environmental quality is analyzed to verify the compliance with the standards. The European recommendation for the yearly primary energy use of new single-family houses is 50 – 65 kWh/m2. For the current case, the simulation tool Be18 gives a result of 30.8 kWh/m2 for the design phase. However, the actual energy use is measured to be 58.2 kWh/m2. The sensibility of nZEBs to such imbalances can lead to houses that do not function as intended. It is thus crucial to investigate further the causes of these disparities in order to bridge the gap between expected and final energy use in dwellings.
Business models for nZEB renovation of small wooden buildings
Authors: Kvellheim Ann Kristin , Damman Sigrid , Lien Anne Gunnarshaug 
Published: October 2019

AbstractTo achieve a sustainable building stock, it is necessary to focus on existing as well as new buildings. New houses built according to the Norwegian building code are close to nZEB (near Zero-Energy Building) level, but existing buildings contribute a significant share of the energy consumption, and the difference between new and older houses is increasing. As the renovation rate is low, it is important to include ambitious energy upgrading once a renovation project is undertaken. So far, however, there is almost no market for nZEB renovation of small wooden buildings. These buildings are challenging to renovate, and even more challenging to do so with ambitious climate targets. In effect, only half of the renovations in Norway include energy renovation. The demand for ambitious renovation depends on a value proposition that is understood by the customer. Novel and well-designed business models can be central tools for achieving this. In this paper, existing and potential business models for renovation of wooden housing are identified and analysed.This paper is based on the “Energy upgrading of wooden dwellings to nearly zero energy level” (OPPTRE) project. One of the activities for researchers, industry and public partners in OPPTRE is to identify, analyse and assess current business models, and develop novel approaches through collaborative workshops and interviews. The results are documented and elaborated upon by the research team before the next step, which is to test the most promising models.Previous research indicates that only a small share of Norwegian enterprises have changed their business model over time. Two of the reasons for this are lack of critical reflection on existing business models and fear of changing the status quo. A third reason is lack of knowledge of how to manage the transformation process. In the process of identifying existing and developing novel business models, the partners in OPPTRE explore new opportunities to promote ambitious energy upgrading. Their commercial performance is likely to increase through the focus on business model design. New business models may also help increase the uptake of innovative energy solutions in the renovation market for small wooden buildings.