bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of fuzzy logic for power change rate constraint in core power control at Reaktor TRIGA PUSPATI
Authors: Minhat Mohd Sabri , Mohd Subha Nurul Adilla , Hassan Fazilah , Ahmad Anita 
Published: May 2020

Abstract
The 1MWth Reaktor TRIGA PUSPATI (RTP) in Malaysia Nuclear Agency has been in operation more than 37 years. The existing core power control uses a conventional controller known as Feedback Control Algorithm (FCA). It is technically challenging to keep the core power output stable and operate within the acceptable error bands for the safety demand of the RTP. At present, the power tracking performance of the system could be considered unsatisfactory where constant gains of power change rate constraint and control rod speed constraint are used. Hence, a study of a new power change rate constraint design to achieve safe control rod speed range is conducted to improve the current performance. In this paper, a new power change rate constraint (PCRC) method using fuzzy logic is proposed to control the core power. The Takagi-Sugeno (T-S) type Fuzzy model is chosen due to its capability to work well with linear controller and making the computational control algorithm efficient. The model for core power control consists of mathematical models of the reactor core, FCA, and control rods selection algorithm. The mathematical models of the reactor core are based on point kinetics model, thermal-hydraulic models and reactivity models. The performance of power tracking and actuation signal for control rod drive input are compared between the conventional PCRC (cPCRC) and Fuzzy PCRC using MATLAB. In conclusion, the proposed Fuzzy PCRC has satisfactory performance in core power tracking for controlling the nuclear reactor with high reliability and safety.
Development of the scanning power supply for 300 keV electron accelerator
Authors: Wah Leo Kwee , Azhar M. , Chulan R.M. , Hashim S.A. , Mokhtar M. , Khaidawaton  , Baijan H. , Sabri R.M. 
Published: May 2020

Abstract
This paper describes the development and study of the scanning power supply. This locally designed low energy electron accelerator with the former energy of 140 keV will be upgraded to 300 keV. As the setup, scanning power supply is required to excite the scanning coils and deflect the energetic electron beam across a titanium foil window in horizontal and vertical direction respectively. The excitation current of the scanning coils is determined by the energy of the electron beam and the deflected length. Therefore, the scanning power supply must be functioning automatically and continuously to ensure the uniform dose distribution and unavoidable heat issue. As the result, the scanning power supply using the combination of signal generator and power amplifier has been developed and functioning as expected.
Research reactor operator performance based on the human error assessment and reduction technique (HEART)
Authors: Hassan Ahmad , Mohamed Faizal , Maskin Mazleha 
Published: May 2020

Abstract
This study is an attempt to apply the Human Error Assessment and Reduction Technique (HEART) method in order to quantify the human failure event (HFE) for probabilistic safety assessment (PSA) of a TRIGA Mark II reactor, situated at the Malaysia Nuclear Agency, Malaysia. This serves the qualitative part of the human reliability analysis (HRA) framework and HEART method is considered due to its potential applicability in quantifying human error probability (HEP) for other industries, beside nuclear power. This study addresses the application of HEART method in details: classification of selected research reactor human task into the Generic Task Type, the assignment of the nominal HEP, evaluation of Error Producing Condition and the resultant Assessed Proportion of Affect. The results of this study will be applied in the quantification of PSA’s event sequence end state frequencies.
Band energies in two-band model for Fe based superconductors in the coexistence state
Authors: Pradhan B , Parida P K , Sahoo S 
Published: May 2020

Abstract
The superconductivity in iron based superconductors is hotly discussed since its discovery. The pairing mechanism and the gap structures for such superconductors are the core of attraction for debate. The superconductivity exists on the suppression of the pseudo gaps like antiferromagnetism and structural distortion. The Fermi surface band structure is studied by proposing a tight binding two-orbital model in s±-wave pairing symmetry for the coexistence of Jahn-Teller distortion and antiferromagnetism with superconductivity.
Oxygen vacancy related conduction behavior in BaZr0.05Ti0.95O3 ceramic
Authors: Nag Bhargavi G. , Badapanda Tanmaya , Khare Ayush , Shahid Anwar M. , Brahme Nameeta 
Published: May 2020

Abstract
For this study, the microcrystalline powder of BaZr0.05Ti0.95O3 (BZT) was prepared by the conventional solid state reaction method. The sample was calcined at 1200 °C for 4 hours and sintered at 1300 °C. The calcined powder was structurally characterized by X-ray diffraction (XRD), which showed that the specimen has a Perovskite structure having orthorhombic structure. On analyzing the scanning electron microscope (SEM) the calculated crystal size was observed to range between 20-30 μm. The dielectric study of BZT showed normal phase transition behavior. The conductivity studies as a function of temperature and frequency has been performed to study the role of oxygen vacancies. The results of the frequency dependence of the conductivity suggest that oxygen vacancy hopping processes, due to relaxations in oxygen vacancy-related dipoles, being mainly responsible for the conduction behavior in the studied system.
Photoluminescence behaviour of Gd doped barium hexaferrite
Authors: Mahapatro Jayashri , Agrawal Sadhana 
Published: May 2020

Abstract
This paper reports synthesis of Barium Hexaferrite with different concentration of Gadolinium ion (0-2 mol %). Structural analysis of the prepared powders was done by X-ray diffraction pattern which reveals formation of hexagonal structure with space group p63/mmc. The FTIR and EDX spectra depict formation and composition of Barium Hexaferrite respectively. Agglomeration was observed from the SEM image of the prepared sample. Photoluminescence studies of the prepared samples show intensified PL emission peaks at 658 nm under ultraviolet (UV) excitation at 230 nm due to the optical transition 6G7/2 to 6P5/2 which arises because of the defects produced by doping of Gadolinium ion into the host lattice. Due to cross relaxation process PL intensity decreases after 1.5 mol% of doping concentration. CIE (commission International de) coordinates and CCT (correlated colour temperature) were also determined for the prepared samples which indicate that the powder samples show intense red cool emission.
Characterization of Photovoltaic Property of a CH3NH3Sn1-xGexI3 Lead-Free Perovskite Solar Cell
Authors: Verma A , Diwakar A K , Patel R P , Verma A 
Published: May 2020

Abstract
Using nano blending of lead-free perovskite organometalliccompound (MABO3) is finding by blending of methylammonium and SnI3. The structure of testing matterial and PV property is characterized on this work. The perovskite structure confirms by XRD analysis and it is havingan orthorhombic crystal phase structure, which can show the perovskite structure. UVPS and UVVIS analysisof the band position of valance at 5.70 eV in competition usingin absence of air and the bandgap of optical is 2.0 eV. The Spin coating of the methylammonium iodide and lead-free iodide (SnI3) on a TiO2 film yields by mixed solution process, 1.80-nm-diameter CH3NH3Sn1-xGexI3 dots on the TiO2 surface.
Computational approach of tumor growth in human body with a significant technique the rough set
Authors: Sinha Arvind Kumar , Namdev Nishant 
Published: May 2020

Abstract
Tumors are the most threatening issue everywhere throughout the world. The development of tumor cells is dubious in the human body because of its unusual phenomena. The Rough set is a rising and the most special mathematical device to manage uncertain circumstances. A scientific model is given for tumor cells population development with carrying capacity and by the Rough set in uncertain circumstances. In this methodology, the mathematical analysis of the nonlinear behavior of tumor cells population is set up via carrying capacity and simulation by using Euler’s method. The accuracy of the carrying capacity of the number of tumors cells 99.53% correct according to our model. The paper is an interface between mathematical modeling, numerical computation, simulation, and implementation of application on biomedical systems, which is an oriented idea to biology.
Second-formulation adaptive wavelet optimization technique applicable in material sciences
Authors: Sinha Arvind Kumar , Sahoo Radhakrushna 
Published: May 2020

Abstract
We developed a second-formulation adaptive wavelet optimize finite element (SFAWOFE) method on a general manifold with the help of approximation theory. The SFAWOFE method used to solve Burger’s equation with periodic and Dirichlet boundary conditions. The beauty of the SFAWOFE process is the numerical solution is optimized for the finite element method and does not affect the computational algorithm. We construct an algorithm for numerical results that have been optimized finite element method on a diffusion wavelet, which formed employing the adaptive wavelet plot. The algorithms and trial problems used to calculate magnetostatic networking range dipoles in material science. For the trial problem, the processing time checked out the SFAWOFE method has calculated and analyzed the analogous processing time checked out the finite element method on a general manifold. Finally, we verify the SFAWOFE method convergence for each trial problem and high efficient.
Design considerations of a collaborative and knowledge sharing tool for a sustainable outcomes-based education
Authors: Galeon D H , Palaoag T D 
Published: May 2020

AbstractThrough a directive, the Philippine higher education institutions (HEIs) are instructed to continuously perform the plan-do-check-act cycle in developing an outcomes-based, progressively brought together and less departmentally based educational plans as they advanced into a mature institution which requires the stakeholders to communicate and collaborate among each other and coordinate their activities. The paper aims to unfold the design parameters of a collaborative and knowledge sharing tool (CKT) considering the most critical factors affecting its implementation and shall serve as a guide to its development. Using a descriptive-analytical method, it shows that the institution has a strong knowledge management (KM) culture but needs to improve and retool their KM initiative and that the stakeholders are engaged more on socializing and control activities yet a lesser sum on networking, coordinating, and collaborating activities. Decomposed from the problem, design parameters of the said tool includes the plan and usage of a messaging module used for communicating and disseminating knowledge to a network; authoring, assessment and expert profiling modules used for a collaborative acquisition, development and dissemination of knowledge; and a digital library and an academic profiling module used for storing, retrieving and mining the institutional outcomes-based education (OBE) knowledge.
Improving the physical and mechanical properties of fortified soil for road construction in the forest zone
Authors: Chudinov S 
Published: May 2020

Abstract
In order to purposefully control the processes that determine the formation of the structure and properties of cement soils, studies were carried out on the strengthening of soils with Portland cement with a water-soluble additive hydropropylene emulsion (WHE). The purpose of the laboratory studies was to study the change in the ultimate strength in compression, water saturation and frost resistance of cement soils, depending on the particle size distribution of the original soil, the amount of mineral binder - Portland cement and the WHE additive. Based on the results of the research, soil strengthening with Portland cement with WHE additive allows to form a complex crystallization-coagulation structure of materials with the required values of compressive strength, water saturation and frost resistance, depending on the dosages of binding components for given climatic and transport-operating conditions. The effectiveness of the WHE additive increases with increasing dispersion of soils, so the technology of strengthening of clay soils in conditions of wet and acidic soils of the forest zone for the construction of forest roads is promising.
Method for reducing the hourly fuel consumption in the transport mode of operation of a forestry machine and tractor unit
Authors: Durmanov M Y , Martynov B G , Mikhaylov O A , Spiridonov S V 
Published: May 2020

Abstract
By improving energy consumption in technological operations, the amount of fuel required and the operating costs of a machine-tractor unit (MTU) can also be reduced, which ultimately lowers the costs of forestry operations and reforestation. Inefficient fuel consumption significantly reduces the performance indicators of an MTU, which is also characteristic of the transport mode, although its duration is short. The article investigates the influence of a corrective device in the diesel fuel supply system on the hourly fuel consumption of a forestry MTU. For the transport mode, the diesel fuel consumption per hour is determined for dynamic loads by component: from resistance on the rise; from the MTU inertial forces; from oscillations of the MTU suspension in the longitudinal-vertical plane; from mechanical losses in the friction pairs of the engine, as well as its total value. The maximum values of the total dynamic component of the hourly fuel consumption in the transport mode are observed at frequencies close to 2.5 s−1, i.e. its own, energy-consuming frequency of oscillations of the rotational speed of the crankshaft of an SMD-20T.04 engine. To improve the fuel efficiency of an MTU diesel engine, it is necessary to introduce a corrective device into the design of the high-pressure fuel pump (HPFP). As a corrective device, it is advisable to use an oscillation damper of the rail of the fuel pump (FPR).
Bases of transport development organization of leased forest plots taking into account climate
Authors: Kovalenko T , Vokhmyanin N , Krivonogova A 
Published: May 2020

Abstract
The article raises the issues of zoning of rental forests taking into account climatic factors for the purpose of rational transport development of forests. The basis of the methodology for taking into account the influence of climatic factors in the organization and planning of forest transport processes through the average speed of timber trucks is proposed. The results of studies are given that allow taking into account the climatic parameters of the area where the enterprise is located.
Monitoring of Forest Land Use/Cover Change in Cat Tien National Park, Dong Nai Province, Vietnam Using Remote Sensing and GIS techniques
Authors: Kovyazin V F , Romanchikov A Yu , Lan Anh Dang Thi , Hung Dang Viet 
Published: May 2020

Abstract
The Cat Tien National Park in the south of Vietnam represents a protected ecological area. It is located in tropical rainforest zone. For monitoring purposes of forest land use/cover change of the park satellite images (Landsat 5, Landsat 7 and Sentinel-2A) taken in 1988, 2003 and 2019 were used. NDVI was used for the estimation of vegetation quality. Forest land use/cover were classified by 5 categories using maximum likelihood classifier algorithm in ENVI 5.3. After classification, differentiation of forest land use/cover was analyzed on every image. Deforestation took place in 1988-2003 periods and broad-leaved forest areas have undergone reduction. Currently, new policies were introduced to reduce deforestation and therefore support free growth of tropical forest areas.
Public easements’ establishment for forest fund lands during seasonal roads’ designing
Authors: Kovyazin V , Romanenko M , Khaikine M 
Published: May 2020

Abstract
The article focuses on question of public easements’ establishment for forest areas intended to accommodate seasonal roads as temporary structures. On one hand, seasonal roads are transport routes, which location changes every season. At the same time, they have features of real estate items as they are inseparably linked with the ground surface, and their movement without disproportionate damage to appointment is impossible. In both cases season roads require immediate strategic decisions, concerning their construction and operation. Due to the fact that seasonal roads are distinctive for territories of the northern regions, they are most often located on the forestry fund lands. That’s why the question of territory planning while designing of such objects in difficult natural conditions is one of the most difficult in civil engineering, geodesy, land and forest law. Relevance is determined by need of increasing efficiency of the forest fund land use during designing of these real estate items, taking into account their specificity. The aim of research involves advanced technology of designing work’s development for seasonal roads. This technology gives opportunity of first-ever defining possible changes of seasonal roads’ boundaries by results of field measurements of physical and mechanical soil properties.
Formation of the through technological chains within the forest industry cluster
Authors: Medvedev S , Mokhirev A , Rjabova T , Gerasimova M 
Published: May 2020

Abstract
The article is devoted to the problem of formation of technological chains in timber industry clusters. Special attention is paid to the movement of material flows and the method of forming technological chains. As a result, a model of the movement of material flows of wood resources within the timber cluster has been developed.
Method of increasing percentage of raw wood materials in plywood production
Authors: Ugryumov S A , Vokhmyanin N A , Zatenko S I , Spiridonov S V , Taraban M B 
Published: May 2020

Abstract
The article deals with the issue of increasing efficiency of plywood production by recycling waste from format plywood trimming. The study proposes manufacturing a composite material with outer layers of full-format peeled veneer and an inner layer based on slats from format trimming of plywood installed on the edge with a different gap. Results of physical and mechanical properties testing of proposed composite material show that using of the slats from plywood trimming allows forming lightweight material holding sufficient strength. Due to return use of plywood production waste, manufacturing proposed composite material reduces total material consumption, which provides cheaper products with effective waste disposal.
Molecular modelling of antioxidant agent by QSAR study of caffeic acid derivatives
Authors: Rahmawati Istiqomah , Amini Helda Wika , Darmayanti Rizki Fitria 
Published: May 2020

Abstract
Molecular modeling using Quantitative Structure and Activity Relationship (QSAR) has been performed on caffeic acid derivatives which is previously studied as an effective antioxidant agent. This research focuses on a set of experimentally IC50 value data of 4 caffeic acid derivatives. The mathematical method (i.e., multilinear regression calculation) was used to build the QSAR model. QSAR analysis was employed on fitting subset using log (1/IC50) as a dependent variable and atomic net charges aromatic carbons, dipole moment and partition coefficient in n-octanol/water as independent variables. The PM3 method was used to calculate the quantum chemical descriptors, chosen to represent the electronic descriptors of molecular structures. The relationship between log (1/IC50) and the descriptors was described by resulted in the QSAR model. The resulted QSAR model for caffeic acid derivatives as an antioxidant is presented below:
-7.858+1.149dipol+0.485logP-61.68C5
R=1; R2=0.999; SE=0.008; F=342
QSAR model for caffeic acid derivatives showed the enhancement of antioxidant activity due to the decrease of electronic properties (derived from the dipole moment value and C5 atomic charge), Log P representing hydrophobicity did not show a significant effect on antioxidant activity while increasing the chain length of antioxidant molecules indicate an increase in steric hindrance causes a decrease in antioxidant activity. The calculated PRESS (Predicted Residual Error Sum of Square) value was 6.69E-05, which indicates the calculated log (1/IC50) using QSAR Hansch Model of caffeic acid derivatives is similar with experimental data.
Analysis of production kojic acid from endophytic fungi Aspergillus flavus isolated from Annona squamosa leaves using an OSMAC Approach
Authors: Ola Antonius R B , Sugi Yoseph , Pada Soa Christina A , Lerrik Reiner I , Tawa Bibiana D 
Published: May 2020

Abstract
An analysis production of kojic acid by endophytic fungi Aspergillus flavus from leaves of Annona squamosa has been undertaken using three different types of media including rice (Oryza sativa), sweet corn (Zea mays L.) and waxy corn (Zea mays ceritina). The fungi were extracted using ethyl acetate and quantitatively analyzed their content of kojic acid using HPLC. The intrapolation peak area of kojic acid’s content in each fungal medium to the regression equation of standard kojic acid resulted in the concentration of kojic acid in each extract 3.149% for rice media, 5.998% for sweet corn media and 2.226% for waxy corn media. Pure kojic acid from an extract of fungi grown on rice media was obtained from 90% DCM fraction by VLC fractionation. The structure was determined by means of NMR and HPLC analysis data.
Synthesis and characterization of modified γ-Alumina-NaA and γ-Alumina-NaX zeolite composites as methanol dehydration catalysts in synthesis Dimethyl Ether (DME)
Authors: Ulfah M , Octavia S , Suherman H , Laniwati M , Makerthiharta IGBN , Subagjo  
Published: May 2020

Abstract
Dimethyl ether (DME) is of great interest due to its wide application. It is currently being demonstrated for use as an alternative diesel fuel or substituting LPG for household. DME production via methanol dehydration reaction is affected by textural properties and catalyst surface acidity. The experimental study of textural properties in addition to surface acidity of both γ–Al2O3 prepared in this study and modified γ–Al2O3 over zeolite A and X mixing were conducted. The catalysts were characterized by N2 adsorption-desorption, X-Ray diffraction (XRD), and temperature programmed desorption of ammonia (NH3-TPD). Referring to N2 adsorption/desorption isotherm using the Brunauer-Emmerr-Teller (BET) equation, the catalysts were observed possessing high specific surface area (170–279 m2 g-1) and pore diameters of 5.6 – 8.8 nm (mesoporous). The XRD patterns of all catalysts still reveals clear peaks of γ–Al2O3 components. The strength of the acid sites of alumina modified with zeolite A is categorized as medium acid sites, whereas modified by zeolite X varies.