bluuebunny/crossref_metadata_2025 huggingface dataset:
Differing design decisions – comparing Swedish FrameNet to
FrameNet*
Authors: Friberg Heppin Karin
Published: November 2021

Creation of framenets for languages other than
English based on Berkeley FrameNet has tested the hypothesis that
semantic frames, to a certain extent, are language independent. This
working hypothesis facilitated reuse of frames for new framenets,
defining language specific frame evoking lemmas and annotating
language specific sentences. The caveat is the bias towards creating
what is possible, rather than typical, in a language. The reuse of
frames allowed developing SweFN in a relatively short period of
time. However, the goal to build a typical, not a possible
Swedish framenet, necessitated some frame modifications.

This chapter provides a comparison between the
English and Swedish framenets regarding semantic annotation and
representation, and socio-cultural factors, including how
differences forced modification of the original structure.
Regularization of the factorization method applied to diffuse optical tomography
Authors: Harris Isaac
Published: November 2021

In this paper, we develop a new regularized version of the factorization method for positive operators mapping a complex Hilbert space into it is dual space. The factorization method uses Picard’s criteria to define an indicator function to image an unknown region. In most applications the data operator is compact which gives that the singular values can tend to zero rapidly which can cause numerical instabilities. The regularization of the factorization method presented here seeks to avoid the numerical instabilities in applying Picard’s criteria. This method allows one to image the interior structure of an object with little a priori information in a computationally simple and analytically rigorous way. Here we will focus on an application of this method to diffuse optical tomography where will prove that this method can be used to recover an unknown subregion from the Dirichlet-to-Neumann mapping. Numerical examples will be presented in two dimensions.
Local saddles of relaxed averaged alternating reflections algorithms on phase retrieval
Authors: Chen Pengwen
Published: November 2021

Phase retrieval can be expressed as a non-convex constrained optimization problem to identify one phase minimizer one a torus. Many iterative transform techniques have been proposed to identify the minimizer, e.g., relaxed averaged alternating reflections (RAAR) algorithms. In this paper, we present one optimization viewpoint on the RAAR algorithm. RAAR algorithm is one alternating direction method of multipliers with one penalty parameter. Pairing with multipliers (dual vectors), phase vectors on the primal space are lifted to higher dimensional vectors, RAAR algorithm is one continuation algorithm, which searches for local saddles in the primal-dual space. The dual iteration approximates one gradient ascent flow, which drives the corresponding local minimizers in a positive-definite Hessian region. Altering penalty parameters, the RAAR avoids the stagnation of these corresponding local minimizers in the primal space and thus screens out many stationary points corresponding to non-local minimizers.
Development of an instantaneous velocity-vector-profile method using conventional ultrasonic transducers
Authors: Yoon Dongik , Park Hyun Jin , Ihara Tomonori
Published: November 2021

A velocity vector profile technique based on an ultrasound pulsed Doppler method can enrich the information on the flow field. However, it has shown low availability because a new design of special transducers is required for each measurement case. This study proposes a new method of profiling the velocity vectors using conventional ultrasound transducers that are widely supplied to ultrasound velocity profile users. We constructed a configuration of transducers to minimize the uncertainty of the detection points at the receivers, and a measurable distance was theoretically determined by the configuration. Two feasibility tests were carried out. One was a test for the assessment of the measurable distance, which agreed well with the theoretical distance. The other was the evaluation of the measurement of 2D velocity vectors by the new method, and it was performed in a towing tank facility without the velocity fluctuation. From the evaluation, it was confirmed that the measured vectors showed good agreement with the reference values, and their accuracy and precision were competitive compared to previous studies. In order to demonstrate this, the developed method was applied to two unsteady flows. The results clarified that the proposed method guarantees high availability and accuracy for the velocity vector profiles.
Upconversion, MRI imaging and optical trapping studies of silver nanoparticle decorated multifunctional NaGdF4:Yb,Er nanocomposite
Authors: Yamini S , Gunaseelan M , Gangadharan Ajithkumar , Lopez Silverio A , Martirosyan Karen S , Girigoswami Agnishwar , Roy Basudev , Manonmani J , Jayaraman Senthilselvan
Published: November 2021

The multifunctional upconversion nanoparticles (UCNPs) are fascinating tool for biological applications. In the present work, photon upconverting NaGdF4:Yb,Er and Ag nanoparticles decorated NaGdF4:Yb,Er (NaGdF4:Yb,Er@Ag) nanoparticles were prepared using a simple polyol process. Rietveld refinement was performed for detailed crystal structural and phase fraction analysis. The morphology of the NaGdF4:Yb,Er@Ag was examined using high-resolution transmission electron microscope, which reveals silver nanoparticles of 8 nm in size were decorated over spherical shaped NaGdF4:Yb,Er nanoparticles with a mean particle size of 90 nm. The chemical compositions were confirmed by EDAX and inductively coupled plasma-optical emission spectrometry analyses. The upconversion luminescence (UCL) of NaGdF4:Yb,Er at 980 nm excitation showed an intense red emission. After incorporating the silver nanoparticles, the UCL intensity decreased due to weak scattering and surface plasmon resonance effect. The VSM magnetic measurement indicates both the UCNPs possess paramagnetic behaviour. The NaGdF4:Yb,Er@Ag showed computed tomography imaging. Magnetic resonance imaging study exhibited better T1 weighted relaxivity in the NaGdF4:Yb,Er than the commercial Gd-DOTA. For the first time, the optical trapping was successfully demonstrated for the upconversion NaGdF4:Yb,Er nanoparticle at near-infrared 980 nm light using an optical tweezer setup. The optically trapped UCNP possessing paramagnetic property exhibited a good optical trapping stiffness. The UCL of trapped single UCNP is recorded to explore the effect of the silver nanoparticles. The multifunctional properties for the NaGdF4:Yb,Er@Ag nanoparticle are demonstrated.
Collision of two coins on a horizontal surface
Authors: Cross Rod
Published: November 2021

Oblique angle collisions of two penny coins on a smooth, horizontal surface were filmed with a video camera to investigate the physics of the collision process. If one of the coins is initially at rest, then the two coins emerge approximately at right angles, as commonly observed in billiard ball collisions and in puck collisions on an air table. The coins actually emerged at an angle less than 90 degrees due to friction between the coins, which also resulted in both coins rotating after the collision. At glancing angles, the friction force was due to sliding friction. At other angles of incidence the coins gripped each other and the friction force was then due to static friction.
Tungsten fiber reinforced tungsten (Wf/W) using yarn based textile preforms
Authors: Coenen J W , Huber P , Lau A , Raumann L , Schwalenberg D , Mao Y , Riesch J , Terra A , Linsmeier Ch , Neu R
Published: November 2021

Material related limitations are one of the main challenges for the design of future fusion reactors. Tungsten (W) as the primary material choice is considered resilient against erosion, has the highest melting point of any metal and shows low activation after neutron irradiation. However, W is intrinsically brittle and faces operational embrittlement. To overcome these issues, W-based composites have been in development. W fiber-reinforced W composite materials (W
f
/W) incorporate extrinsic toughening mechanisms allowing the redistribution of stress peaks and thus overcoming the intrinsic brittleness problem. In this contribution recent results on the incorporation of new textile preformes into W
f
/W production will be given with a focus on the production via chemical vapor deposition of tungsten-based materials. The use of tungsten yarns, instead of single wires for the textile production is elaborated.
Analysis of TESS Field Eclipsing Binary Star V948 Her: A Pulsating or Non-pulsating Star?
Authors: Kahraman Aliçavuş F , Ekinci Ö
Published: November 2021

Pulsating stars occupy a significant place in the H-R diagram and it was thought that all stars inside the classical instability strip should pulsate. However, recent studies showed that there are many non-pulsating stars located inside the classical instability strip. The existence of these non-pulsating stars is still a mystery. To deeply understand the properties of these non-pulsating and pulsating stars, one needs precise fundamental stellar parameters (e.g. mass). For this purpose, the eclipsing binaries are unique systems. Hence, in this study, we present the TESS data analysis of one candidate pulsating eclipsing binary system, V948 Her. TESS data were used for the binary modeling with the literature radial velocity measurements, and the precise fundamental parameters of the system were obtained. The system’s age was derived as 1 ± 0.24 Gyr. The positions of the binary components in the H-R diagram were examined and the primary component was found inside the δ Scuti instability strip. However, in the frequency analysis of TESS data, we found no significant pulsation frequencies. Only the harmonics of the orbital periods were obtained in the analysis. Therefore, the system was classified as a non-pulsator. V948 Her is an important object to understand the nature of non-pulsating stars inside the δ Scuti instability strip.
About calculation of the ground-state energy of the helium atom
Authors: Baklanov E V , Pokasov P V , Taichenachev A V
Published: November 2021

Two versions of the numerical calculation of the ground state energy of the helium atom are compared. First, the nonrelativistic Schrödinger equation with a fixed nucleus is solved, and then the perturbation theory is used. Another version solves this problem exactly. Comparison shows that the difference between the calculation results is 94 kHz.
Forced mode locking in a semiconductor laser
Authors: Zakharyash V F , Klement’ev V M , Titov E A
Published: November 2021

A brief description of the theory of mode locking of a semiconductor laser when the modulating generator frequency is close to the intermode frequency is given. It is shown that during mode locking there is phase locking, due to which the dispersion of summed intensity in the interpulse interval tends to zero.
Spectroscopic properties of CrOx/Al2O3 nanopowders synthesized by cw CO2 laser vaporization
Authors: Baronskiy M G , Kostyukov A I , Snytnikov V N
Published: November 2021

Nanosized 5.0 wt% Cr/nano-Al2O3 powders with the particle size of ca. 15 nm were synthesized via laser vaporization using irradiation by a cw CO2 laser in different gas atmospheres – Ar, Ar+O2, Ar+H2. All the investigated nanopowders were studied by XRF, XRD, TEM, UV-vis DRS and PL spectroscopy methods. The nanopowders were found to contain the Cr6+ ions located on the surface of Al2O3 nanoparticles and two types of Cr3+ sites. One type is Cr3+ ions located in the bulk (Cr3+
b-sites) of Al2O3 matrix in a strong crystal field. The second type is represented by Cr3+ sites residing near the surface (Cr3+
s-sites) of CrOx/Al2O3 nanoparticles in a weak crystal field. It was shown that varying the composition of the buffer gas (Ar, Ar+O2, Ar+H2) during laser vaporization makes it possible to control the properties of the obtained 5.0 wt% Cr/nano-Al2O3 nanopowders with a change in Cr6+/Cr3+ ratio in the bulk and on the surface of alumina support.
Study of Ne:He Plasma of a Periodically Pulsed Discharge for Optically Pumped Rare Gas Laser
Authors: Torbin A P , Chernyshov A K , Svistun M I , Mikheyev P A
Published: November 2021

Optically pumped rare gas lasers (OPRGL) suggested recently as a chemically inert analog of diode-pumped alkali lasers are under extensive study at present. OPRGLs employ metastable atoms of heavier rare gases (Rg*) in He bath produced in discharge plasma. Ar* OPRGL is the most popular system at present, due to presence of a narrow band diode pump and abundance of Ar. However, Ne* OPRGL is interesting due to its visible lasing wavelength at 703.2 nm nm and presence of channels of energy transfer in Ne-He plasma that facilitate Ne* production. We present the first results of experiments with Ne* OPRGL that include Ne* number density in its active medium, and lasing experiments to determine pumping threshold for s5 → p9 transition in a transverse pumping configuration using a narrow band pulsed dye laser as a pump.
The Explicit Formulae of the Determinants of Specific Pentadiagonal Toeplitz Hessenberg Matrices
Authors: Feng Jishe , Fan Hongtao
Published: November 2021

The pentadiagonal Toeplitz matrix is a special kind of sparse matrix widely used in linear algebra, combinatorics, computational mathematics, and has been attracted much attention. We use the determinants of two specific Hessenberg matrices to represent the recurrence relations to prove two explicit formulae to evaluate the determinants of specific pentadiagonal Toeplitz matrices proposed in a recent paper [3]. Further, four new results are established.
Numerical Simulation of Oil-Water Flow Velocity Field and Flow Pattern in Horizontal Wells and Near Horizontal Wells
Authors: Ma Yingying , Song Hongwei , Zhao Changqi , Wei Ran , Sun Lihuizi
Published: November 2021

Oil-water flow widely exists in oilfield development. Due to the gravity differentiation, the oil-water flow in low-flow horizontal wells has a clear characteristics of stratified flow. With the increase of flow rate, the stratified characteristics are not obvious, which leads to the difficulty of multiphase flow phase separation flow interpretation in oilfield. In this paper, the oil-water flow in horizontal wells is taken as the research object. The VOF model of Fluent software is used to study the relationship between velocity field and flow pattern distribution characteristics with water cut, well deviation angle and total flow. The results show that with the increase of water cut, the oil-water separation level gradually moves up, and the velocity of water phase is greater than that of oil phase. When the well deviation angle changes slightly, the flow stratification of oil-water changes sharply, and the flow velocity in the pipeline also changes. When the total flow rate is lower than 200 m3/d, the oil-water phases have obvious stratified flow characteristics. With the increase of flow rate, the oil-water interface fluctuates. The average velocity of oil and water is not much different.
Analysis and Application of Salop Model under Network Effect
Authors: Tong Qian
Published: November 2021

Based on Salop’s ring city model, this paper applies the mathematical model to solve the problem of benefit game about Bertrand competition under the environment of network effect. The equilibrium solutions for both players are given in this paper, and the equilibrium solution of Salop’s ring city model depends on the effect of network externalities. The magnitude of network externalities determines the changes in welfare.
Optimization for Far-distance Cooperative Rendezvous with Multiple Direction-fixed Thrusts
Authors: Ren Fei
Published: November 2021

The continuous-thrust far-distance cooperative rendezvous problem between two spacecraft is investigated. The indirect optimization method, based on Pontryagin’s maximum principle (PMP), is applied to optimize fuel consumption. To overcome the difficulty in nonsmooth integration caused by the bang-bang control, the homotopy method is adopted to solve the fuel-optimal problem from a related energy-optimal problem. The quantum-behaved particle swarm optimization (QPSO) algorithm is used to obtain the energy-optimal solutions. The energy-optimal solutions are used as the initial values for the homotopic procedure to obtain the fuel-optimal solutions and optimal bang-bang control law. A hybrid algorithm combined homotopy method and sequential quadratic programming (SQP) algorithm is proposed. This hybrid algorithm can effectively obtain feasible optimal solutions even though the indirect optimization method exhibits a narrow convergence domain. Simulations of high-thrust and low-thrust rendezvous problems are provided and the proposed hybrid algorithm is verified. Moreover, the necessity of radial thrust is investigated.
Research on Acoustic Transfer Performance of Power Cabin of Underwater Craft
Authors: Li Hanqin , Fang Bin , Zhang Yongming
Published: November 2021

In order to study the acoustic performance of underwater vehicle including vibration and noise, two kinds of structure models of an underwater craft cabin in the air medium and in the water medium were analyzed separately by finite element method. Through modal analysis, the impedance ratios of the two kinds of models were calculated. The influence of the thickness of the pressure hull on the impedance ratio of the structure was studied, and the acoustic transfer performance was analyzed and compared between the two kinds of models.
Modeling and Simulation of Single Battery Load Isolated Electric Vehicle Based on Simulink
Authors: Liu Benchao
Published: November 2021

The load isolation electric vehicle improves the range of electric vehicle, which separates the concept of power and energy, so that the engine can always work in the most economical operating area. Based on Simulink, a single battery load isolation electric vehicle model is established for a mini car. According to the requirements of vehicle performance indexes, the parameters of vehicle system model, gasoline generator set, battery pack and motor model were matched. In the process of accelerating the average speed to the set maximum speed, the battery voltage curve and the motor output power are analyzed. The analysis shows that the battery has no overvoltage danger and the motor does not exceed the peak power, thus verifying the feasibility and superiority of the model.
Research on Soft Sensor Modeling Method and Its Application in Wastewater Treatment
Authors: Li Mingzhu , Zhang Shouxing , Chen Yuanyuan
Published: November 2021

In order to solve the problem of real-time monitoring of water quality index which is difficult to measure in the process of wastewater treatment, a dynamic modeling method of soft sensor based on the VIP (Variable Importance in Projection) and JIT (Just-in-Time) methods was proposed. Firstly, the important variables were selected by the VIP method, and then the data were updated by the JIT method. Finally, the soft sensing model of PLS (partial least squares) was established. The model was used to predict BOD5 which was an important water quality parameter in the process of wastewater treatment. The simulation results indicate that the proposed model achieves better mean square error and correlation coefficient.
Modeling Simulation and Maintenance Strategy Optimization of Multi-component System
Authors: Ma Yujun , Zhou Yan
Published: November 2021

As the system tends to be complicated and refined, the probability and cost of failure also increase. In the actual operation and production, the system will be affected by various factors such as temperature, humidity and other factors to change their original working environment, which will have greater impact on the reliability of the system. Based on the reliability theory, this paper mainly studies thek-out-of-n: Fsystem, constructs the reliability model of the system in dynamic environment, gives the simulation algorithm of the system reliability. Finally, this paper puts forward two maintenance strategies which are optimized to achieve the purpose of minimizing the long-term average cost during system operation.
Cross-platform Simulation of Bipolar Junction Transistor Electrical Principle
Authors: Wu Hongjun , Yin Bangzheng , Chen Zetao
Published: November 2021

This paper designs a set of simulation method about bipolar junction transistor (short for ‘BJT’) electrical principle, which can be used as the foundation of cross-platform simulation of semiconductor electronic technology. Firstly, a mathematical model is established to simulate the amplification effect of bipolar junction transistor current control, the influence of Base current and Collector-Emitter Voltage on the working area of bipolar junction transistor. Secondly, interactive multimedia such as graphics, images and animation are used for simulation presentation through cross-platform software design method which is the mainstream internet web page interaction technology. Finally, a logic structure of the whole simulation software is designed, which presents data transmission, control workflow, relationship between each class and each layer in the simulation software.
Research and Modeling Electronic Data Tracing Scheme Based on Blockchain
Authors: Jiang Zhengtao , Chen Yi , Liu Zheng , Chen Hao , Zhang Jianhong , Zhu Yanchao
Published: November 2021

From the point of view that the traditional electronic data (documents in image, PDF, etc) is difficult to track and trace, taking image copyright as an example, this paper studies a new scheme to solve the problem of replication detection and traceability based on blockchain. With the decentralization and trust removing of blockchain, both copyright storage and evidence of infringement are stored in a tamper proof and transparent way. Based on the judgment of image similarity, a “resource reverse tracing strategy” is designed to control the infringement timely. The infringement evidence can reach the creator quickly, which provides convenience for the creator’s rights protection. This method changes traditional tracing methods of image copyright. Also, it can be applied to the tracing problem of reuse of electronic invoice, short video, music, etc, and brings new ideas for the related problem.
Modeling Analysis and Comparision of Neural Network Simulation Based on ECM and LSTM
Authors: Duan Lingyun , Liu Ziyuan , Yu Wen , Chen Wei , Jin Dongyan , Li Denghua , Sun Suhua , Dai Ruixi
Published: November 2021

Comparing the prediction effects of traditional econometric algorithm model and deep learning algorithm model, taking regional GDP as an example, two prediction models of ARMA-ECM and LSTM-SVR are established for prediction, and the prediction results of different models are compared and analyzed. The results show that there are some deviations in the prediction results of the two models, but the prediction trends are the same. The prediction accuracy of LSTM-SVR model will decrease significantly with the reduction of time series data samples, while ARMA-ECM model is not so sensitive.
Periodic Solution of A Delayed Intraguild Predation Impulsive System with Strong Allee Effect
Authors: Ai Jiao , Wang Kaihua
Published: November 2021

With periodic coefficients and strong Allee effects, we establish a delayed intraguild predation impulsive model. We obtain a set of sufficient conditions for the existence of positive periodic solution of the model using Mawhin’s continuation theorem and analysis techniques. Finally, we identify the effectiveness of the theoretical results through some numerical simulations.
Study of Helium Cooled Fast Reactor Core Design Fuelled by Thorium Carbide-Uranium Carbide with Modified Candle Axial Direction Scheme
Authors: Su’ud Z , Galih N R , Ariani M
Published: November 2021

Human need of energy will increase time to time. Therefore, a safe, renewable, and efficient source of energy, which is Nuclear Energy, is needed. Nuclear Power Plant (NPP) is the most compatible solution to provide electricity to human race in the future. The problem that came within NPP is the danger of proliferation issues. The method that has been developed to overcome this problem is CANDLE [5] and has been modified by Prof. Zaki Su’ud (Modified CANDLE scheme). This research use Axial Modified CANDLE Scheme to Helium-Cooled Fast Reactor with Natural Uranium Carbide-Thorium Carbide as fuel and applied to various size of core as optimization. Neutronic aspect such as, burn up level, multiplication factor, and conversion ratio are utilized in this paper in order to analyse the behaviour of the reactor. Other than that, percentage of Uranium has been varied to reduce power peaking. The neutronic calculation has been done using SRAC and core design calculation by FI-ITB-CH1. This research concludes that power peaking reduction is able to achieve by combining Uranium Carbide and Thorium Carbide to the fuel. The optimum reactor design reached at 360 cm of core radius and 303 cm of core height.
Study on fusion blanket with ceramic solid as tritium breeding material
Authors: Maemunah I R , Su’ud Z , Waris A , Irwanto D
Published: November 2021

Variation of solid ceramic breeding might be one of the excellent candidates in a fusion reactor. The LiAlO2, Li4SiO4, Li2O, and Li2ZrO3 show pretty good requirements in tritium breeding capability and thermodynamic behavior. Especially for LiAlO2 and Li2ZrO3, in which they could be possible to breed without neutron multiplying needed as blanket used generally in order to reach the self-sufficiency reactor. So that, it makes up the material could be possible as high-estimation breeder material.
The prediction of molecule atomization energy using neural network and extreme gradient boosting
Authors: Sumanto M , Martoprawiro M A , Ivansyah A L
Published: November 2021

Machine Learning is an artificial intelligence system, where the system has the ability to learn automatically from experience without being explicitly programmed. The learning process from Machine Learning starts from observing the data and then looking at the pattern of the data. The main purpose of this process is to make computers learn automatically. In this study, we will use Machine Learning to predict molecular atomization energy. From various methods in Machine Learning, we use two methods namely Neural Network and Extreme Gradient Boosting. Both methods have several parameters that must be adjusted so that the predicted value of the atomization energy of the molecule has the lowest possible error. We are trying to find the right parameter values for both methods. For the neural network method, it is quite difficult to find the right parameter value because it takes a long time to train the model of the neural network to find out whether the model is good or bad, while for the Extreme Gradient Boosting method the time needed to train the model is shorter, so it is quite easy to find the right parameter values for the model. This study also looked at the effects of the modification on the dataset with the output transformation of normalization and standardization then removing molecules containing Br atoms and changing the entry in the Coulomb matrix to 0 if the distance between atoms in the molecule exceeds 2 angstrom.
Core Configuration Analysis for Modular Gas-cooled Fast Reactor (GFR) using OpenMC
Authors: Raflis H , Ilham M , Su’ud Z , Waris A , Irwanto D
Published: November 2021

The core configuration analysis of modular Gas-cooled Fast Reactor (GFR) has been done to understand GFR performance. The modular GFR used a fast neutron spectrum and high-temperature helium gas, providing higher thermal efficiency than the other generation IV reactor candidates. In this paper, the variation of core configuration and dimension for core design has been applied in radial, axial, and radial-axial directions. The Monte Carlo method, named OpenMC code, has been used for the criticality and isotope evaluation of design core GFR. The OpenMC code provides the probabilistic solution to solve the neutron transport equation in a 3D model and non-homogenous physical volumes using Evaluated Nuclear Data File (ENDF/B-VII.b5) and continuous energy spectrum. The neutronics parameters characterized are the value of keff, fission rate and neutron flux distribution, and fissile material evolution to know of GFR core design’s performance. The analysis showed that the core configuration in radial direction gives a good understanding of the feasibility of GFR core design.
Preliminary Analysis on Burnup Calculation of Several Arrangement of TRISO and Pebble inside an MCNP Model of HTR Core
Authors: Luthfi W , Suwoto  , Setiadipura T , Zuhair
Published: November 2021

Several studies related to simplifying the modeling of pebble bed High-Temperature Reactor core (HTR) has been developed before. From some calculation on several MCNP models with a fueled pebble to dummy ratio 57:43, using a combination of several types of TRISO (TRi-structural ISOtropic particle fuel) unit and Pebble unit is modeled to achieve its first criticality. In this paper, some MCNP model that uses 27000 pebbles with a 57:43 ratio and 100% fueled pebble is created to be used on burnup calculation and to compare its k-eff and nuclide inventory. From this burnup calculation, it could be seen that SC (Simple Cubic) TRISO unit has faster calculation time followed by the HCP (Hexagonal Close Packed) TRISO unit and then the FCC (Face-Centered Cubic) TRISO unit. The BCC (Body-Centered Cubic) pebble unit had some consistent deviation from another pebble unit, and it still needs more study to know more about the reason behind it. It could be seen that if there are some dummy pebbles inside the reactor, then the deviation would be higher than if there is just fueled pebble inside the reactor. On the 57:43 ratio, the absolute average deviation of k-eff on burnup calculation is lower than 2% and 10% for nuclide inventory (mass). On 100% fueled pebble, it’s below 0.15% on k-eff absolute deviation and below 8% on nuclide inventory deviation.
Hydrodynamical model during east season at Gosong Coastal West Borneo as candidate location of nuclear power plant in Indonesia
Authors: Prasetyo A T , Muslim  , Suseno H
Published: November 2021

Indonesia planned to build the first nuclear power plant in Gosong Coast, Bengkayang Regency, West Kalimantan. This research examined the hydrodynamical conditions in the ocean of Gosong Coast during the eastern season. This hydrodynamic model can be considered in estimating the distribution of various radionuclide wastes that release to the ocean. It was simulated using the Delft3D flow module application for 15 days which included the neap and spring tide conditions. Base on the result of the hydrodynamical model, Gosong Coast had a mixed semidiurnal type of tide with low amplitude. The wind parameters involved higher impacts to the hydrodynamical conditions. The model result did not find significant differences between neap and spring tide periods. There was a flow collision between 2 opposite water currents which was occurred at Burung Archipelagic during flood tide and at the Coastal area of Singkawang City during ebb tide. Therefore, the ocean currents at Gosong Coast flowed directly offshore through Burung Archipelagic during ebb tide. Meanwhile during flood tide, these ocean currents moved to Singkawang and Sambas Coastal area before they deflected toward offshore.
Increasing the quality of anchovy (Stelophorus sp.) with additional concentration of chitosan
Authors: Achmad M J , Taher W S , Djamhur M , Samman A
Published: November 2021

Anchovy is a main capture fishery commodity in North Maluku. Currently, the processing activity of anchovy is relatively simple and traditional, consequently, causing anchovy quality to be easily degraded. One solution to overcome the problem is through the addition of chitosan concentration. This study aimed to determine effect of concentration addition of chitosan on quality of water content, protein, fat, carbohydrates, organoleptic and Total Plate Count (TPC) test. Method used in this research was the analysis of water quality test, protein content, fat content, carbohydrate content, calorie content, organoleptic test and TPC test. The study results showed that the highest water content value was 13.65% at 0.1% concentration, the highest protein value was 61.16% at 0.5% concentration, the highest ash content value was 16.5% at 1% concentration, the highest fat value was 3.99% at 1% concentration, and the highest fat value was 3.99% at 1% concentration. The highest carbohydrate content found was 11.94% at 0.1% concentration, and the highest calorific value was 2.51% at 1% concentration. Meanwhile, average organoleptic value of the highest appearance was 6.87% at a 0.3% concentration, the highest odor was 7.55% at a 0.3% concentration, the highest texture was 7.45% at a 0.1% concentration and color was 6.25% at a 0.3% concentration. Results of the TPC tests showed that anchovy with chitosan treatment and without chitosan during storage changed for all treatments. The average TPC value at all concentrations (0.1%, 0.3% and 0.5%) had the lowest TPC value compared to the control.
Free radical scavenging activity of five selected sea cucumbers collected from Lampung waters, Indonesia
Authors: Rasyid A. , Putra M Y , Yasman
Published: November 2021

Sea cucumber is an important raw material for food and remedy in the Eastern region. However, a study focusing on identifying the health benefit of sea cucumbers from tropical waters is still limited. A study on the free radical scavenging activity of five selected sea cucumbers collected from Lampung waters, Indonesia has been done. The objective of this study was to evaluate the free radical scavenging activity of five selected sea cucumbers, namely Stichopus vastus, Stichopus quadrifasciatus, Holothuria (Metriatyla) lessoni, Holothuria (Mertensiothuria) leucospilota, and Bohadschia marmorata. The extraction method which used in this study was the maceration method using methanol solvent while the free radical scavenging activity test is carried out using 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) method. Compared to other species at a concentration of 250 µg/mL, S. vastus, S. quadrifasciatus, H. lessoni and H. leucospilota showed the strongest scavenging activity. While B. marmorata was classified as a very weak scavenging activity. It can be concluded that S. vastus, S. quadrifasciatus, H. lessoni H. leucospilota, and H. lessoni are important sea cucumbers from tropical waters as a source of natural antioxidant agents in the future.
Effect of addition of pro-enzymes and Spirulina flour on growth and color intensity of betta fish (Betta sp)
Authors: Fabanjo M A , Abdullah N
Published: November 2021

Betta fish is one of the ornamental fish that has high economic value because it has features such as the beauty of the body color, the uniqueness of the shape of the fins so that it is very attractive to ornamental fish lovers. Attractiveness value of ornamental fish can be measured from their brilliant color, shape and physical completeness, behavior, and health conditions. Color is one deciding factor that ornamental fish is in demand by consumers, so that farmers need to maintain the color of ornamental fish by providing food containing color pigments. The aim of this study was to obtain a mixture of effective doses of pro-enzyme Spirulina flour in feeding to increase growth and color intensity of betta fish. The results showed that the highest absolute weight growth was found in treatment B (5 grams) of pro-enzyme Spirulina flour 2.154 followed by treatment C 1.554 (7 grams), treatment A 0.844 (3 grams), and treatment D 0.002 (0 grams). The highest level of color change occurred in treatment A (dose of 3 grams) while the lowest color change rate was found at treatment D (0 grams).
Increasing growth and survival rate of tilapia larvae (Oreochromis niloticus) by adding polychaeta Nereis sp dry meal into feed formulation
Authors: Ahmad K , Yuliana  , Amin R , Syazili A , Surahman
Published: November 2021

Aquaculture has been known as one of solutions in dealing with food security problem through applying best practices of aquaculture and increasing fish production. In many countries, fish production is considered an essential activity contributing to household income and trade. However, fish feed has an expensive price, and it constitutes 60-70% total cost of production. The objective of this study is to reveal an alternative cheap source for additional ingredients to fish diet formulation of Tilapia larvae (Oreochromis niloticus). 240 fish larvae from local hatchery were used and cultured in 4 aquariums with different dose of protein diet (30%, 35%, 40%, and control). The source of protein diet is Polychaeta Nereis sp which was collected from surrounding Kastela Sea. Nereis sp was processed into dry meal and was added into the feed formulation. The result shows that the useful of 40% protein of Nereis sp gives the highest growth and survival rate of tilapia larvae, which is 44,99 g and 100%. It is followed by 35% and 30% Nereis protein, respectively. It is interesting that protein control which is feed commercial has almost similar growth level as the highest one. Specific growth rate (SGR) is 3,74%-3,79% per day for different protein dose of Polychaeta. Survival rate is 100% for all treatments which means all fish can survive and growth continuously from beginning to the end of the study.
Effects of different combination of culture medium on growth and nutrition content of black soldier fly larvae (Hermetia illuens)
Authors: Muchdar F , Andriani R , Juharni  , Wulansari A
Published: November 2021

Fish feed is the most essential necessity and the biggest contributor on production cost of fish cultivation. As much as 50-70% production cost is for fish feed. It can be deducted by made alternative fish feed. Black soldier fly larvae is an alternative fish feed with high protein content and most importantly it is cheap. The aim of this research was to evaluate the growth and nutrition content of black soldier fly larvae which cultivated in different medium. Medium used in this study was combination of coconut pulp residue and three other different medium, such as tofu dregs, sago dregs, and rice bran. Each combination had three different level of concentration, 1:1, 1:3, 1:5 (w:w). It was evaluated for nutrition content (proximate analysis), biomass, and dried yield. The result showed combination of coconut pulp and sago dregs 1:5 produced the highest biomass (465 g), but black soldier fly larvae produced from combination of coconut pulp residue and tofu dregs 1:3 had the highest protein content (39.78%). The best medium to produce black soldier fly larvae based on multiple attribute decision making (MADM) method was from the combination of coconut pulp residue and sago dregs 1:5 (w:w). It had 465 g biomass, 186 g dried yield, 23.73% protein, 47.67% fat, and 22.15% carbohydrate.
Maintenance and spawning on yellowfin tuna broodstock reared in floating net cage
Authors: Tridjoko  , Hutapea J H , Setiadi A , Gunawan  , Selamet B
Published: November 2021

Yellowfin tuna (Thunnus albacares) is one of the fish species that have important economic value which is expected to become one of foreign exchange that can give solution to national economy. Hatchery technology of yellowfin tuna performed at the Research Institute for Mariculture and Fisheries Extension Gondol has been successfully spawned. However, the quality and quantity of eggs produced is still not optimal. The purpose of this study was to determine the performance of spawning on yellowfin tuna broodstock reared in floating net. This research was conducted in cage with a diameter of 48.8 m with a depth of 8 m, filled 90 fishes yellow fin tuna with weights ranging between 50-70 kg per fish. Feed given is: fresh fish, squid and added vitamin C and vitamin E. The study was conducted for 11 months from January to November 2017.The results showed that the yellowfin tuna could spawn monthly. The highest spawning frequency occurred in July at 17 times. The highest total number of eggs harvested was 8,740,350 in October. Hatching rate between 50-92%. Survival activity index (SAI) is 1.8-3.5%. Survival rate of yellow fin tuna during maintenance reached 92.2%.
Identification and determination of growth hormones of Kappaphycus alvarezii cultivated in Ekas Bay East Lombok
Authors: Cokrowati N , Risjani Y , Andayani S , Firdaus M , Honiar R
Published: November 2021

The extract of red marine algae contained growth-enhancing properties which is associated to age and their morphotypes. Kappaphycus alvarezii cultured in Ekas Bay, Lombok, Indonesia was studied and aimed to determine the content of growth-promoting substances in the young and old thallus of brown and green morphotypes of K. alvarezii. The content of K. alvarezii thallus growth substances was determined by High Performance Liquid Chromatography (HPLC). This study showed that the old thallus in the brown K. alvarezii strain contained auxin 8.43 ppm and the young thallus 2.89 ppm, while the old thallus in the green strain K. alvarezii contained auxin 10.92 ppm and the young thallus contained 16.28 ppm. This study concluded that auxin was the only growth promoter detected in K. alvarezii seeds in both young and old thallus in green and brown morphotypes.
Length distribution, gonad maturity level, and catchable size of fish caught around FADs in Ternate Sea
Authors: Kadir I A , Taeran I , Harahap Z A
Published: November 2021

Pelagic fishery business in Ternate Sea are mainly based on FADs fishing operations. Increase of intensive fishing activities will also increase the pressures on local pelagic fish resources of Ternate Sea in the future. So far, there has been limited scientific information related to the fish caught by local fishers. The aim of the study was to investigate length distribution, gonad maturity level (GML), and catchable size of fishes caught around FADs. The research was conducted in August 2020 in Ternate. The research method was a survey research by collecting samples of fish caught from gill nets and hand lines for total 30 fishing trips. The study results showed that the catch consisted of mackerel scads and yellow scads. The mackerel scads caught by gill nets were between 13-26 cm in size and dominated by the 19-20 cm size class, while fishes sizes caught by hand line were between 14-27 cm which were dominated by the 18-19 cm size class. Yellow scads caught with both gill nets and handlines showed the same length range of 12-23 cm, which was dominated by the size class of 18-19 cm. Mackerel scads caught with gill nets and handlines were dominated by fish in GML II (47%) followed by GML III (32%). GML of yellow scads caught with gill nets was dominated by GML III by 75%, while for fishes caught by hand line the percentage of GML III is 68%. The mackerel scads caught with gill nets and handlines were dominated by the non-catchable size category (100% for gill nets and 98.79% for handlines). On the other hand, all yellow scads caught with both gill nets and handlines are entirely (100%) of catchable size.
Potentials of CaO powder result of calcination from green shells (Perna viridis), scallops (Placuna placenta), and blood clams (Anadara granosa) as antibacterial agent
Authors: Mediarman G N , Sumardianto  , Riyadi P H , Rianingsih L , Purnamayati L
Published: November 2021

Calcium oxide (CaO) can be formed from the calcination process of calcium carbonate or CaCO3. One of the ingredients that contain quite a lot of CaCO3compounds is clam shells. Shellfish shells can be an alternative for making natural antibacterials. Calcination was carried out at 1000°C for 6 hours. The bacteria tested wereStaphylococcus aureusandEscherichia coliwhich are pathogenic bacteria. The concentration of each CaO powder is 3.5% with a size of 150 mesh. The purpose of this study was to determine the antibacterial effect of CaO from three different shells, namely blood clams, green clams and scallops and to determine the third antibacterial effect of mussels. The research method used was a completely randomized design (CRD) with one factor influencing the antibacterial activity of CaO three times. Parametric data were analysed using ANOVA and Honest Significant Difference (HSD). The research treatment was the use of three different shells, namely blood, scallops and green mussels with tetracycline as control. Parameters observed were pH, calcium, chemical composition, and activity. The pH value of CaO powder has an average of 12.47. The levels of CaO produced were 99.43% in blood clams, 99.62% in green mussels and 98.4% in scallops. The diameter of the inhibition zone ofStaphylococcus aureusbacteria for each clam shell was 15.22 ± 0.66 mm, green mussel 13.7 ± 0.26 mm and scallop 14.9 ± 0.25 mm. The diameter of the inhibition zone ofEscherichia colibacteria produced was 12.2 ± 0.36 mm blood clams, 12.5 ± 0.3 mm green mussels and 13.7 ± 0.2 mm scallops.
Growth patterns of skipjack tuna (Katsuwonus pelamis, linnaeus 1758) caught by troll line in Prigi waters, Trenggalek East Java Indonesia
Authors: Bintoro G , Lelono T D , Setyohadi D , Fadzilla U
Published: November 2021

Skipjack tuna (Katsuwonus pelamis) is an important pelagic fish species caught in tropical and subtropical waters of the Pacific, Atlantic, and Indian oceans. Skipjack tuna (K. pelamis) is also a high economic fisheries resource in Prigi waters which is caught by troll line. High market demand results in high levels of exploitation. This study aimed to identify the length-weight relationship and biological reproduction of skipjack tuna in the Prigi waters. The research was conducted in the sampling period between December 2019 - April 2020 with total samples obtained as much as 1642 fish and was analyzed using linear regression. The results informed that the length-weight relationship of skipjack tuna was positive allometric with equation W=0.007FL3.223 which means that the fish has a fat body. The sex ratio between male and female fish is 1:1. While gonad maturity level obtained in this study is mostly in GML 1 and GML 2 which indicates that the catches were dominated by immature fish, so it is necessary to limit fishing effort so that sustainability of the skipjack tuna (K. pelamis) resource can be managed.
The effect of sucrose addition on the sensory quality of “terasi” an Indonesian shrimp paste
Authors: Rianingsih L , Sumardianto  , Romadhon  , Rusdi M B , Riyadi P H
Published: November 2021

Terasi is a fermented product made from shrimp or fish with or without salt. In general shrimp paste producers only add high salt concentration to preserve the raw materials and to ensure successfully fermentation process. However there are shrimp paste producers in the Pati, Central Java, Indonesia that use sucrose sugar as a source of carbohydrate in the shrimp paste production. Sugar will affect the reactions that occur during the shrimp paste production process and will ultimately affect the characteristics of the product. This study aims was to determine whether there is an effect of adding sucrose sugar to the flavor and sensory characteristics of the shrimp paste. The Result showed that the addition of sugar did not affect the aw and TPC BAL value, but it decreased the TVBN value, soften the texture value and in addition the sensory was more prefered by the panelist. The characteristic of shrimp paste with sugar addition was low aw value 0.631 ± 0.631, TPC BAL was not detected, TVBN value 115.641 ± 9.940 mgN/(100 gr) and sensory 7.872 < µ < 8.328. The use of sucrose can be recommended to be added during shrimp paste production to increase consumer preference.