bluuebunny/crossref_metadata_2025_split huggingface dataset:
Robust transmission of medical records using dual watermarking and optimization algorithm
Authors: Amrit Preetam , Anand Ashima , Kumar Sushil , Singh AK 
Published: February 2021

Abstract
Nowadays, security of medical records is an important issue for tele-health system. Motivated by importance of such critical issue, we propose a robust watermarking method in the DWT-SVD-optimization domain. To solve the security issue, traditional watermarking schemes uses manual scaling factor to manage balance between imperceptibility, robustness and capacity. However, selection of manual scaling factor loses their optimize trade-off between these important parameters of watermarking. The suggested scheme encourages protection of medical data via techniques of dual watermarking and optimization scheme. In our scheme, the data owner imperceptibly embeds the dual watermarks in the medical cover image for extra level of security. Here, appropriate optimization schemes are used to find the scaling factor for embedding purpose. Further, the performance of this scheme is examined and compared. Moreover, the patient text data is coded via hamming code before inserting in to the cover so that bit error rate can be avoided or eliminated, if any. We show that the suggested scheme not only offers the high imperceptible but also robust for various attacks. Compared with existing schemes, our work offers more robustness while imperceptible and good capacity at the same time.
Design Of Interlock High Voltage Bay Transformer 150/20 kV System Simulator
Authors: Dinata Seflahir , Asroni Muchlis , Bakhri Syaiful 
Published: February 2021

Abstract
Simulator is a tool or means that is needed in learning to replace the role of a real system or equipment. The simulator providing a solution for repetitive operation of equipment. This is not possible on the actual equipment such as in a high voltage transformer of electrical distribution system. The purpose of this study was to design a simulator of a 150/20 kV transformer bay interlock system using a PLC as a control device and computer monitor as a display (human machine interface). In this simulator there are 15 states to describe the interlock system between the circuit breaker and the disconnecting switch both on the 150 kV side and on the 20 kV side. Interlock system design using state diagram method. PLC Ladder diagrams are written with CX-programmer software and HMI programming using CX-Supervisor software. The validity test of the simulator is done by using event validity techniques. The design results show that the overall interlock system runs as a whole with the percentage of validity is 100 percent or with a validity index 1, so it can be concluded that the simulator of the 150/20 kV transformer bay interlock system can be used as a learning tool to replace the real system.
Neutronics analysis of PWR core using DRAGON, TRIVAC, and DONJON computer codes
Authors: Sukarno D H 
Published: February 2021

Abstract
Operation of NPP has potential of nuclear hazard and radiation hazard. Therefore, all efforts are absolutely needed to be performed to ensure the safety of NPP operation. Neutronics analysis has important role in ensuring that safety aspect. In neutronics analysis, computer codes that could well simulate the neutronics condition in reactor core are needed. In this paper, neutronics analysis of 2652 MWt PWR core has been performed using DRAGON, TRIVAC, and DONJON computer codes. The purpose of simulation is to conduct the calculation of neutronics parameters which are important for safety. The neutronics analyses was conducted in two stages, i.e. cell calculation using DRAGON and full core calculation using TRIVAC and DONJON. For verification, the comparation between the calculation results of DRAGON, TRIVAC, and DONJON, and those of other computer codes results found in literature was performed. The effective multiplication factors calculated by DONJON for conditions where all control rods were fully up and fully down, and for ‘one stuck rod’ condition were 1.23399, 0.69705, and 0.91340, respectively. The core maximum power and average power were found to be 21166.1 kW and 16891.7 kW, respectively, with the power peaking factor of 1.2530. The maximum and average neutron fluxes in the core were 4.019038E+14 n/cm2s and 9.035312E+13 n/cm2s, respectively. The results of fuel cell calculation using DRAGON and the full core calculation using TRIVAC and DONJON have the differences of 4% and 1.3%, respectively, compared to the calculation results using other computer codes. This research shows that DRAGON, TRIVAC, and DONJON have capabilities to perform the calculation of neutronics parameters for NPP, specifically PWR type.
Day and Night Thermal Mass Performance Studies on Wetland Settlement in Palembang
Authors: Triyuly Wienty , Triyadi Sugeng , Wonorahardjo Surjamanto 
Published: February 2021

Abstract
The phenomenon of urban heat island was affected by the thermal mass of the area. The massive development of settlement in the wetland of Palembang had changed the natural thermal mass composition. This paper discussed the effect of the settlement development in the urban thermal environment of the wetland of Palembang. We measured the effect of building, pavement, water body and vegetation factors in the day and night air temperature of the settlement area. Direct field measurement was done using the wet and dry thermometer, anemometer and globe thermometer for 3x24 hours. The result showed that there were differences in day and night air temperature in the area with different thermal mass composition. It was also affected by wind direction and weather conditions. We concluded that the day and night temperature balance of the area could be control by the composition of thermal mass in the settlement area.
Fuzzy logic-based power control system of a supercritical-pressure light water fast reactor
Authors: Sutanto  , Lestari Erpina Dwi , Puspitasari Ayu Jati 
Published: February 2021

Abstract
Supercritical-pressure light water fast reactor is one of the current concepts of the Generation IV reactors which have significant improvement on the efficiency, safety and economy. A change of power to flow ratio leads to a change of the outlet coolant temperature in second. The temperature deviation must be suppressed as small as possible to keep the integrity of the reactor structures, like the reactor outlet nozzles, main steam line, etc. The plant dynamics analysis was carried out by giving perturbations of power to flow ratio, and then its influence on the reactor power and outlet coolant temperature were observed. A fuzzy logic-based power control system was designed and applied to the plant to compensate the effects of the perturbations. The control’s parameters, like the member functions of fuzzification were optimized to satisfy the criteria of allowable outlet coolant temperature deviation and stability. The power could be controlled stably by the optimized control design and the criterion of the outlet coolant temperature deviation is satisfied against perturbations of power to flow ratio.
Semi-Analytical Methods and Simulation for Temperature Distribution of Helium Purification System for Reaktor Daya Eksperimental
Authors: Setiawan Muksin Aji , Rosidi Ainur , Bakhri Syaiful 
Published: February 2021

Abstract
Reaktor Daya Eksperimental (RDE) or Indonesian Experimental Power Reactor has been started from 2014 in term of conceptual design. The reactor design as modified of HTR-10, it’s a High Temperature Gas-cooled Reactor. RDE using Pebble bed fuel type and will be built to 10 MWth and 3 MWe. In future usage, RDE would be uses as reactor model in Indonesia. It can be scale up to generate more power or it’s can be modified as small modular reactor to supply electricity for home consumption. In the end of 2018, the project targeted to be finish all detail engineering design. One of the system that design is helium purification system. The helium purification was important to reactor because it’s affect directly to cooling mechanism of the reactors. This research aim to simulate the temperature distribution on this system to make sure that there is no overheating in some part of system. The research will considering heat from system and environment. This research using analytical methods and matlab software to simulate the problem. Visualization of temperature change and distribution can be shown in function of time. The temperature set as factor to decide which material the best to uses in the future infrastructure of RDE.
Preliminary Development of Online Remote Multipurpose Reactor Monitoring System
Authors: Bakhri Syaiful , Yulanda Erik Agustian , Subekti Muhammad , Taryo Taswanda , Sunaryo Geni Rina , Segeng  
Published: February 2021

Abstract
RSG-GAS is the largest research reactor owned by Indonesia which has been operating for 31 years since August 18, 1987. RSG-GAS has employed the Simatic S7-400 Siemens PLC. However, the PLC system has not been optimized for remote online monitoring reactor purposes. Therefore this paper aims to design a wireless reactor monitoring system using LabVIEW. LabVIEW software is selected due to the flexibility and reliability for the software and hardware integration. Monitoring is carried out for the parameters of temperature, pressure and flow rate. The research covers the design interface on LabVIEW, wireless communication analysis, the verification process and validation of the monitoring system. The results obtained from this study are monitoring systems of RSG-GAS process diagram, verification of data communication and the analysis of the correctness the received data. The full paper will show that the RSG-GAS monitoring system using LabVIEW can applied in the RSG-GAS monitoring system.
Preliminary Development of the FPGA based Reactor Protection Systems for Reaktor Daya Eksperimental (RDE)
Authors: Bakhri Syaiful , Susilo Joko Tri , Maerani Restu , Sudarno  , Ardiyanto Doni Agus 
Published: February 2021

Abstract
The reactor protection system is a very vital and essential system to ensure the safe operation of the Reaktor Daya Eksperimental (RDE). The current reactor protection system mostly uses a lot of analog components. The analog system is more sensitive to the noise, and more expensive compared with the digital system. Therefore, this study aims to design and model the reactor protection system based on a digital platform using Field Programmable Gate Array (FPGA). The FPGA platform is selected because of the high reliability, easy for reprogrammed and having high loop rate execution. This research method covers the preliminary design of the reactor protection system using FPGA CompactRIO. The verification and validation are then employed to ensure the reliability of RPS. Furthermore, this system is tested with various postulated initiating event of the RDE’s design basic accident. The result of this research is that FPGA has excellent reliability and has a fast response. It can be concluded that the simulation of the reactor protection system using FPGA can be used in the reactor protection system after being verified and validated.
Natural Convection Flapper Valve Design for the Bandung Research Reactor Conversion
Authors: Sudjatmi K.A. , Kamajaya K. , Reinaldy N. , Fitriana Rian , Santiko T.S. 
Published: February 2021

Abstract
National Nuclear Energy Agency has planned to convert the Bandung TRIGA reactor by replacing the rod-type into plate-type fuel elements. The calculation results show that Bandung TRIGA Plate reactor with 2000 kW power requires forced convection cooling system. According to the calculation results using the Coolod-N2 computer program the minimum required cooling flow rate is 70 kg/s. Consequently, it is necessary to modify the reactor primary cooling system. In this modification required a flapper valve design that can a double function. The valve closed when the primary pump is powered and the flow rate on the primary coolant is 70 kg/s. However, when the pump is off because of the power outages and the reactor will scram, so the flapper valve will open. The residual heat in the reactor core will be cooled by natural convection. There is reversal flow from a downward to an upward cooling direction, and the upward natural convection heat removal throughout the flapper valve. In addition, the reactor also will scram if the cooling flow rate drops below 85% of 70 kg/s. The flapper valve is equipped with a ballast pendulum to open the flapper valve. The pendulum load must be greater than the flapper valve force plus the pump force due to forced flow. The flapper valve will open, if the flow rate is smaller than 85% of the required flow. Conversely, the flapper valve load must be smaller than the amount of flapper valve force and flow due to the pumps attractiveness, so that the flapper valve can be closed tightly and the reactor can operate with a forced convection flow. The design of natural convection flapper valve considers the following of a reliable, a work based on passive systems, a simple, an easy to make, an easy maintenance and it can be observed from the top of the reactor tank deck. As a redundancy, the operation of natural convection a flapper valve is added by mechanical operation, so the operation of the valve is truly reliable.
Microstructure and mechanical properties of flash butt welding joint of high nitrogen austenitic stainless steel
Authors: Yu Y , Ji Q J , Yang H F , Cui X J , Zhao H Y , Ding Y H 
Published: February 2021

Abstract
The microstructure and properties of high nitrogen stainless steel welded joints under different flash currents were studied by flash butt welding. The results show that, the flash welding parameters have obvious influence on the joint structure and mechanical properties. The joint is organized into symmetrical distribution, and the grains obtained in the interface area are small, mostly pearlite and ferrite. With the increase of flash current, grain coarsening in overheated zone (OZ) and welding zone (WZ) of joint, which was mainly attributed to the increase of welding heat input. Martensite exists on both sides of the weld, in which the hardness reaches the peak. The tensile strength of welded parts can reach up to 97% of the base material, and the fracture is in the form of ductile fracture.
Effect of epoxy emulsion on properties of ultra-high toughness cementitious composites
Authors: Zhou J W , Yu B Y , Gao Y X , Yang W , Cheng B J 
Published: February 2021

Abstract
The ultra-high toughness cementitious composites (UHTCC) was modified by different types of epoxy emulsion, the effect of the emulsion on working performance, mechanical properties and impermeability of UHTCC were studied. The result showed that compared with the control without epoxy emulsion, the type I and type II epoxy emulsion improved the working performance of UHTCC with low dosage. However, the type III epoxy emulsion exhibited an improvement effect on working performance of UHTCC only when the dosage was high. The addition of epoxy emulsion to UHTCC caused a decrease in compressive strength and flexural strength, but epoxy emulsion and hydration products formed an excellent energy absorption mechanism in the specimen and enhanced the elastic modulus of UHTCC. Type I and II epoxy emulsion had little effect on the tensile properties of UHTCC. Type III epoxy emulsion greatly increased the ultimate tensile strength of UHTCC, and the strain hardening phenomenon disappeared at low dosage level, however, the effect of strain hardening had been improved by increasing its dosage.
Effect of limestone powder on mechanical properties and microstructure of phosphogypsum
Authors: Ma P F , Li S , Cheng B J , Yu B Y , Gao Y X 
Published: February 2021

AbstractIn order to enhance the large-scale and high-quality application of limestone powder (LP) and phosphogypsum in the construction industry. Therefore, this paper mainly studies the effect of LP on the physical and mechanical properties of phosphogypsum-based composites, and clear the mechanism of action from the micro level. Based on the results, the conclusions were as follows: LP has the effect of reducing the standard consistency water requirement and shortening the setting time of fresh phosphogypsum-based composites slurry; LP can increase the bulk density and reduce 24-hour water absorption of hardened phosphogypsum-based composites matrix; In addition, the strength of the matrix increases first and then decreases with the increase in the amount of LP and the recommended amount of LP is 5%-10%. Microscopic tests have shown that when the amount of LP is less than 10%, it can effectively reduce the porosity, refine the pore size, and play the role of a dense hardened matrix. In addition, the appropriate amount of LP particles can be adsorbed on the surface of dihydrate crystals, increasing the bonding force between the crystals, which is conducive to increasing the strength of the composite matrix.
Stability analysis of H-section steel arch considering effect of welding residual stress
Authors: Chen S H , Chi M Z , Fu X M , Mao J W , Ju J S 
Published: February 2021

Abstract
The steel arches with weld H-shaped sections are frequently used in various engineering structures. The welding procedure will produce residual stress, which affects the stability of the arches. This paper presented a numerical model to explore the influence of welding residual stress on the stability behavior of the steel arch. Then, the buckling load and structural deformation of the steel arch under uniform load were obtained through the static analysis, and the stability performance of entire structure was discussed. Furthermore, in order to compare the mechanical properties of the arch simulated by different elements, the shell element and beam element were used respectively in the finite element modal to obtain ultimate bulking load of the structure with the same section. It is concluded that the existence of welding residual stress reduced the ultimate bearing capacity of steel arch under uniform load.
Estimating Al 1230 clad thicknesses over Al 2024 alloys using apparent eddy current conductivity measurements
Authors: Ansari Zain A , Abu-Nabah Bassam A , Alkhader Maen , Muhammed Adnan 
Published: February 2021

Abstract
The recent developments in apparent eddy current conductivity (AECC) spectroscopy have made it a viable candidate for clad thickness estimation where both clad and substrate are nonmagnetic metals. It negates the previous requirement of establishing a probe characteristic curve with a consistent lift-off distance between the measured sample and the calibration blocks. This eliminates the adverse effects in measurement uncertainty that occurred earlier due to liftoff variations. This study presents a practical approach for clad thickness estimation using AECC spectroscopy targeting clad thicknesses relevant to the industry. The technique once validated both numerically and experimentally has shown to deliver a measurement uncertainty of 3% over the entire coating thickness range of interest at a ±25.4μm lift-off range. Furthermore, it also reduces the coil diameter requirement to as low as 3 mm without the need of any correction factors.
The inverse design and optimization for composite materials with random uncertainty
Authors: Song S F , Wang Z Q , Cheng Y L 
Published: February 2021

Abstract
The inverse design is a contemporary novel modern design method and it can provide strong theoretical support for composite materials. The GMDH-NN and Kriging surrogate models are carried out to construct the transfer relations between input variables and output responses by combining finite element analysis and sensitivity analysis. In view of the objective existence of random uncertainties, structural mechanical behaviors of composite are considered as deterministic and uncertainty responses respectively, and then the corresponding optimization mathematical models are constructed. Meanwhile, genetic algorithm (GA) is employed to solve the presented inverse optimization design. Furthermore, several examples of laminated and 2D-woven composite materials are delivered to show that presented procedures are reliable and effective to obtain the dispersive of input parameters, which are of great significance in practical engineering.
Coupled thermomechanical analysis of stress distributions in a ceramic matrix composites turbine vane considering the anisotropic properties
Authors: Fang G W , Gao X G , Song Y D 
Published: February 2021

Abstract
The prediction of the stress distribution plays a key role when replacing conventional metallic components with ceramic matrix composites (CMCs) ones in the turbine engine. Furthermore, the complete thermal-mechanical properties of a CMCs component cannot be obtained through experimentation. Accordingly, a numerical method to calculate the thermal-mechanical properties of a CMCs component should be established. In this work, a 3D finite element model of CMCs turbine vane was applied. Then, the stresses due to thermal and pressure loads were simulated. Based on the simulation results, the maximum thermal residual stresses are about 40MPa and occur at the surface of the vane. It can be concluded that the thermal residual stresses should not be neglected for the studied CMCs turbine vane. The load cases have significant effects on the stress distributions. The maximum spanwise stress reached the level of 300MPa and it was larger than the hoop stress and through thickness stress. The locations of maximum and minimum stresses also vary with load cases.
Study on the modeling and application of arc structure’s profile tolerance
Authors: Yan Z H , Qiu N Y , Hu J C , Li X G 
Published: February 2021

Abstract
Profile tolerance can play a comprehensive control role, and then it can replace some other kinds of geometric tolerances, so it is widely used in practical engineering. However, there are few studies on profile tolerance modeling. There are only several papers in public, and the modeling methods in these papers all have certain deficiencies. In addition, the arc structure is much more used in practical engineering to deal with approximation of free-form surfaces, and the arc structure is often controlled by profile tolerance. Therefore, a modeling method specifically for the arc profile tolerance is given, and a tolerance analysis method including arc structure is given by combining the profile tolerance modeling method and Vector Loop and Monte Carlo method. Statistical distribution of each tolerance is included in the tolerance analysis method, and an example is given.
Shuffled Frog Leaping Algorithm Based Neural Network and Its Application in Big Data Set
Authors: Shan Wei , Cui Shaohua , Wang Jiangtao 
Published: February 2021

Abstract
This paper studies the random optimization algorithm to reorganize the leapfrog algorithm. The big data challenge requires an effective optimization algorithm to explore potential data structures using deep neural networks. At first, we introduce the neural network classifier and compare it with the support vector machine. Neural networks are suitable for large data sets and have the complex ability to extract high-level abstract data. And then we have to introduce a large dataset covering cancer data and voice data. Both datasets have large numbers of samples with complex low-level variance. At last we have to use the reorganized leapfrog algorithm to optimize neural network parameters. The random leapfrog algorithm is efficient and robust to a local minimum. The experimental results show that the algorithm has extensive application prospects and is suitable for the classification of big dataset. The neural network parameters can effectively optimized by the improved shuffled frog leaping algorithm.