bluuebunny/crossref_metadata_2025_split huggingface dataset:
Air-Sea interaction in the Tropical Pacific Ocean during 2018 as revealed by multi-satellite data
Authors: Antakusuma Willy , Nur Muhamad , Iskandar Iskhaq 
Published: August 2019

Abstract
The air-sea interaction in the tropical pacific ocean is a critical to influence climate change around Pacific Ocean and whole of the world. According to that matter, this research is supposed to explain the variations of climate parameters in Pacific Ocean during 2017/2018 as La Niña tendency with using saveral satellite data which consist of: sea surface temperature (SST), sea level pressure (SLP), outgoing longwave radiation (OLR), wind and precipitation with length of time from 2005 until 2018 as compared with climate activity in 2010/2011 La Niña phenomenon. The 3.4 nino index showed there is short periods (less than six month) negative values deviation in 2017/2018 or cannot be claimed as La Niña phenomenon. Consistent with 3.4 nino index, the air-sea interaction in 2017/2018 has showed normal condition since no significant anomaly activity in parameters used if compared with parameters activity in 2010/2011 La Niña phenomenon.
Measurement and analysis of TS-Frequency relationship on mackerel tuna (Euthynnus affinis) using bandwidth frequency
Authors: Jaya I , Aulya R , Fauziyah  
Published: August 2019

Abstract
Mackerel tuna (Euthynnus affinis) is a pelagic fish from Scombridae family and one of the commercially important species. The fish is mostly found in the water column from the surface down to about 50 m. Mackerel tuna spread widely in the tropical and subtropical waters, including the Indian Ocean, Pacific, Mediterranean Sea, and Black Sea. Since the level of exploitation of this fish resource is relatively high, it is critical to have an accurate assessment on the status of the stock. In this paper we report and discuss the measurement results of the acoustic target strength (TS) of Mackerel tuna using acoustic broadband technique. A broadband technique was used to better characterized the basic TS-Frequency relationship of the target, and hence less bias in biomass estimation. Target Strength measurement was performed using SIMRAD EK-80 scientific acoustic instrument with frequency bandwidth 160-240 kHz and sound pulse was transmitted to the target with 1 CW pulse and 8 FM pulse. The fish was tethered and positioned directly below the acoustic transducer. The results of the measurements are presented in terms of TS-Frequency. It is found that the TS-F relationship fluctuates, where the highest TS value -54.64 ± 4.64 dB is in 190-200 kHz frequency interval.
Biological response to quails (Coturnix coturnix) given hydrolyzed feather meal at different levels
Authors: Said M I , Abustam E , Pakiding W , Mide M Z 
Published: August 2019

Abstract
The biological response is one of the important parameters to evaluate the performance of a farm. Each individual will give a different biological response according to the treatment applied. Feeding is one of the biological needs of the quail (Coturnix coturnix). The purpose of this study was to evaluate the biological response of quails to the treatment of hydrolyzed feather meal with different levels. A total of 100 heads quail, one week old were used as samples. The treatment consisted of four levels (L0 = 0%, L1 = 1%, L2 = 1.5% and L3 = 2%). Each treatment was repeated five times. The treatment was uses a unidirectional design of completely randomized design (CRD) a 4x5 = 20 treatment units. Each treatment unit was uses five heads quails. The duration of the observation process was 30 days. The data were analyzed statistically using ANOVA. The results showed that the treatment of hydrolyzed feather meal at different levels at a level of 2% did not had a significant effect (P>0.05) on all parameters. The biological response of the increase in body weight gain was in the range of 2.00-2.37 g/head/day. The highest body weight in the treatment with L3 (2%), in weeks 3 and 4. The average intake of feed was 14.84-15.79 g/head/day, the feed conversion was 0.60-0.68 and the in vivo digestibility of the protein was 40.48-51.69%. The results of the study indicate that the introduction of broiler feather meal from the hydrolysis in the quail feed (Coturnix coturnix) at a level of 2% has the same biological response. Therefore, an introduction with a level of >2% should be applied to discover the differences between treatments.
The dynamics of functional microbes population in two depths under raru (Cotylelobium spp) stand
Authors: Elfiati D , Susilowati A , Modes C 
Published: August 2019

Abstract
Raru (Cotylelobium spp) is one of the endemic plants in North Sumatra from the Dipterocarpaceae family. Plant growth is strongly influenced by the condition of the soil environment. Soil provides nutrients to increase plant growth. Soil also a habitat for various microbes that affect plant growth. This study aimed to calculate functional microbial populations under raru stands such as arbuscular mycorrhizal fungi, phosphate solubilizing microbes, and cellulose decomposer microbes. The measurement of the population use plate count methods. Soil samples were taken in composite with 0-5 cm and 5-20 cm in the raru pulut, raru dahanon and raru songal rhizosphere area in Bona Lumban Village, Tukka District, Central Tapanuli Regency North Sumatra. The result showed that a functional microbial population was calculated higher at a depth of 0-5 cm compared to a depth of 5-20 cm. The microbial population of phosphate solubilizing microbes ranged from 10.12x 103 to 92.44x103 CFU mL−1 with the largest population found in the raru songal rhizosphere. Cellulose decomposer microbial populations ranged from 6.21x103 to 21.55x103 CFU mL-1 with the highest population found in the raru pulut rhizosphere. The highest arbuscular mycorrhizal fungi density in raru dahanon rhizosphere.
Microplastics Dissemination from Fish Mugil dussumieri and Mangrove Water of Muara Teluknaga, Tangerang, Banten
Authors: Rahmawati Nur H F , Patria Mufti P 
Published: August 2019

Abstract
Plastic trash accumulation under 5 mm (microplastics) has been playing as water contaminant for a long time period. Microplastics dissemination in the ocean can be threat and trigger for biological effects especially if ingested by the marine biota. The fish Mugil dussumieri is marine biota which is marine biota food resource used as bioindicator to investigate the presence of microplastics in Mangrove Muara Teluknaga, Tangerang, Banten. Microplastic are found both from fish Mugil dussumieri sample and the water sample during the investigation. The type of microplastics most commonly found on M. dussumieri sample and water sample is fiber. The average fiber can be found digestive organ is 164 particles/organs more than respiratory organ 132.5 particles/organ. The average amount of fiber found is 431.5 particles/L and film is 291.5 particles/L.
A numerical study of mixing and sediment transport caused by tidal in the Bontang waters
Authors: Alghifari N , Nasution Y N , Mandang I 
Published: August 2019

Abstract
Freshwater and sediment that carried by the river then flow into the bay will cause sediment transport and mixing in the bay, in this case the Bontang Waters. The three-dimensional finite difference baroclinic model system (ECOMSED) is used to do numerical studies of the mixing and sediment transport process, this model was simulated for 40 days and verified using tidal data that taken using CTD. The values of sediment concentration ranged from 1×10−6 to 1×10−5 gr/cm3 on the surface, with sediment transport ranging between 0 – 12 (gr/m2)/s. Salinity on the surface is 0 - 35 ppm, and the temperature is 25 - 40 ° C. Mixing occurred at one river mouth with a salinity profile of 25 ppm on the surface and 32 ppm at the bottom, the sediment concentration value was in the range of 1.2×10−5 gr/cm3 on the surface and decreased to 4×10−6 gr/cm3 at the bottom.
Providing biodiversity information to support sustainable development of Sugihan wetlands, South Sumatra
Authors: Setiawan Arum , Iqbal Muhammad , Setiawan Doni , Yustian Indra 
Published: August 2019

Abstract
Air Sugihan or Sugihan wetlands is a subdistrict in Ogan Komering Ilir district, South Sumatra province, Indonesia. The area covering is about 2.593 km2, mostly dominated by wetlands, ranging from peatland to the mangrove zone. The Padang-Sugihan Wildlife Reserve is a Wildlife Sanctuary that borderly or within Air Sugihan wetlands. Before the area was set aside for a wetland reserve in April 1983 the area was being prepared for transmigrant settlers. Among other threatened wildlife, birds and fishes are two taxa that very fragile to human disturbances. Since November 2016, we explore basic biodiversity information of Sugihan wetlands, particularly focus on fish and bird diversity. A total of 33 species of fishes and 39 birds were recorded, suggest the wetlands in this area support important habitat of rich diversity. To collect information on bird diversity, three survey methods were applied (riverine survey, time point counts and incidental search). For collecting data of fishes, we collect specimens from local fishermen, with additional data collected by us using hand netting and fish trap netting. Long-term study was initiate to providing comprehensive biodiversity information to support sustainable development of Sugihan wetlands.
Ab initio calculations of p-shell nuclei up to N2LO in chiral Effective Field Theory
Authors: Maris Pieter 
Published: August 2019

Abstract
Nuclear structure and reaction theory are undergoing a major renaissance with advances in many-body methods, realistic interactions with greatly improved links to Quantum Chromodynamics, the advent of high performance computing, and improved computational algorithms. State-of-the-art two- and three-nucleon interactions obtained from chiral Effective Field Theory provide a theoretical foundation for nuclear theory with controlled approximations. With highly efficient numerical codes, tuned to the current generation of supercomputers, we can perform ab-initio nuclear structure calculations for a range of nuclei to a remarkable level of numerical accuracy, with quantifiable numerical uncertainties. Here we present an overview of recent results for No-Core Configuration Interaction calculations of p-shell nuclei using these chiral interactions up to next-to-next-to-leading order, including three-body forces. We show the dependence of the ground state energies on the chiral order; we also present excitation spectra for selected nuclei and compare the results with experimental data.
The Bethe-Salpeter approach to bound states: from Euclidean to Minkowski space
Authors: Castro A , Ydrefors E , de Paula W , Frederico T , de Alvarenga Nogueira J H , Maris P 
Published: August 2019

Abstract
The challenge to obtain from the Euclidean Bethe–Salpeter amplitude the amplitude in Minkowski is solved by resorting to un-Wick rotating the Euclidean homogeneous integral equation. The results obtained with this new practical method for the amputated Bethe–Salpeter amplitude for a two-boson bound state reveals a rich analytic structure of this amplitude, which can be traced back to the Minkowski space Bethe–Salpeter equation using the Nakanishi integral representation. The method can be extended to small rotation angles bringing the Euclidean solution closer to the Minkowski one and could allow in principle the extraction of the longitudinal parton density functions and momentum distribution amplitude, for example.
Fusion barrier distribution and superheavy elements
Authors: Hagino K , Tanaka T 
Published: August 2019

Abstract
The barrier distribution, originated from channel coupling effects in heavy-ion fusion reactions, has been extracted experimentally for many systems using either a fusion excitation function or an excitation function of large-angle quasi-elastic scattering. In this article, we discuss an application of the latter method to the 48Ca+248 Cm system, which is relevant to hot fusion reactions to synthesize superheavy elements. To this end, we carry out coupled-channels calculations for this system, taking into account the deformation of the target nucleus, and discuss the role of deformation in a formation of evaporation residues.
Investigation of ions in human whole saliva by analytic techniques
Authors: Miura V M , Zamboni C B , Tasso O G , Lewgoy H R , Jesus K A , Silva R Y R 
Published: August 2019

Abstract
In this study, ions of clinical relevance in non-stimulated human whole saliva obtained from healthy subject’s donors (adults and children) at São Paulo city (Brazil), were investigated. The Instrument Neutron Activation Analysis (INAA) and Energy Dispersive X-Ray Fluorescence (EDXRF) techniques were used. The comparison concentration between adults and children for Cl, K, Ca and Fe showed significant differences for all elements, emphasizing the need of adopting different reference values.
The influence of superfluid core cooling in the braking index of Pulsars.
Authors: Frajuca C , Bortoli F S , Santos G A , Nakamoto F Y , Souza M A 
Published: August 2019

Abstract
Pulsars are stars from which electromagnetic radiation is observed to pulsate in well-defined time intervals as the star rotates and the emission of eletromagnetic signal is located in a place different from the rotation center. The frequencies of the pulses decay with time, quantified by the braking index (n). In the canonical model n = 3, in general, for all pulsars, but observational data shows that n is lower than 3. In this work a new model is presented, based on a modification of the canonical one incorporating the influence of neutron and proton density that appear in the superfluid core and, as the star cools down, the density of the superfluid core increases making the star to shrink with time and temperature, making the inertia moment to decrease. The difference ot this model from the canonical one is that the star moment of inertia decreases with time (what would accelerate the rotation of the star) what makes the star to not slow down as fast as it should without this process.
Spin-orbit effects in the 8Li+58Ni elastic scattering
Authors: Santos O C B , Lichtenthäler R , Pires K C C , Moro A M , Umbelino U , Zevallos E O N , Assunção M , Appannababu S , Alcántara-Núñez J , de Lara A L , Scarduelli V , Guimarães V , Lépine-Szily A , Serra A. S. , Linares R , Zagatto V A B , de Faria P N , Morcelle V , Morais M C , Barioni A , Shorto J M B 
Published: August 2019

Abstract
In this work we present an elastic scattering angular distribution for the 8Li+58Ni system measured at Elab = 26.1 MeV. The 8Li beam was produced in the Radioactive Ion Beams in Brasil (RIBRAS) facility using the 7Li primary beam delivered by the 8-UD Pelletron accelerator. The angular distribution covers the angular range from 20 to 85 degrees in the center of mass frame. The data have been analysed by optical model and coupled channels calculations, including couplings to low-lying states in 8Li and the spin-orbit interaction. Our results indicate that the inclusion of the spin-orbit interaction in the calculations is important to describe the data at backward angles.
Standard Reference for Zero Temperature from Quantum Supersymmetry is Possible?
Authors: Marques C , Dias G S , Chavez Sanchez H H 
Published: August 2019

Abstract
Supersymmetry at a susy harmonic oscillator, H(ω
1, ω
1), can be broken or restored in certain conditions and parameters, that are linked with thermal interaction and with a polynomial interactions of creation and annihilation operators. All possibles supersymmetric harmonic oscillators represented by a point (ω
1, ω
1) in the frequency space of the system, are in a two dimensional surface parametrized by the (ω
2, α
2), which we call s-surface, where α
2 is the interaction parameter. The temperature in the s-surface are intended to be zero. Interaction with the thermal bath represented by the tilde Hilbert space from the doubling Hilbert space, establishes thermal oscillations that push the system from the s-surface. In such a way we can define the set of all supersymmetric harmonic oscillator or in a equivalent way the s-surface as a global standard reference for zero temperature.
Two-way coupled simulation of the Francis-99 hydrofoil using model order reduction
Authors: Tengs Erik , Einzinger Johannes , Storli Pål-Tore 
Published: August 2019

Abstract
The Francis-99 hydrofoil is simulated using a quasi two-way Fluid-Structure Interaction procedure. The structural domain is reduced by the use of modal decomposition, and solved for inside the commercial fluid solver ANSYS CFX. Both the first order Backward Euler and second order Crank-Nicolson time discretization scheme is used in the structural equations, with significantly different results. Several coupled fluid-structure phenomena is observed that would be unobtainable in a normal one-way approach. The most interesting is an “added stiffness” effect, where the eigenfrequency of the foil increases when the flow velocity is increased. This trend corresponds well with available experimental results. The same phenomenon is observed in the hydrodynamic damping on the foil. Self-induced vibration due to vortex shedding is also simulated with good results.
The implemented two-way approach allows the different forcing terms to be tracked individually, due to the discretization of the second order structural system. This provides insight into the underlying physics behind the different FSI phenomena seen, and helps us explain why the damping and eigenfrequency characteristics change as the flow velocity passes the lock-in region.
A test of the v2-f k-ϵ turbulence model for the prediction of vortex shedding in the Francis-99 hydrofoil test case
Authors: Sagmo K F , Storli P T 
Published: August 2019

Abstract
A test of the v
2 − f k − ϵ turbulence model for the flow around the Francis-99 hydrofoil geometry is conducted in order to assess it’s accuracy of trailing edge vortex shedding prediction. The model is based on the k − ϵ turbulence model, but needs no wall damping function, and also allows near-wall turbulence anisotropy. For reference, the model results are compared with the the SST k − w, in addition to preliminary experimental results previously published. It is indicated that the v
2 − f k − ϵ model gives at least as good, or better results than the more commonly used SST k − w model for the present case, though further measurements are needed in order to make a proper conclusion.
Fluid structure interaction of Francis-99 turbine and experimental validation
Authors: Østby Petter T. K. , Agnalt Einar , Haugen Bjørn , Tore Billdal Jan , Gunnar Dahlhaug Ole 
Published: August 2019

Abstract
The ability to predict a francis runners dynamic response to the exciting forces is paramount to avoid unwanted disintegration of the turbines components. In this article, each of the principal factors contributing to the dynamic response of the runner; eigenfrequency, mode shape, damping and pressure force, is individually examined and compared to the measured values from the Francis-99 runner. Even though the runner is made with a bolted connection between the blades and crown/band, and thus severely increasing the complexity, quite accurate predictions are possible using methods previously validated for massive and symmetric runners. All calculations are conducted on the best efficiency point and with eigenmodes corresponding to Nodal Diameter 4 as excited by the second harmonic of the guide vane passing frequency. The calculated natural frequency for the first two ND4 eigenmodes are within ±5% of the measured values. Further are the calculated eigenmodes, forcing pressure field and hydrodynamic damping all within measurement tolerances with some minor exceptions.
Application of the Harmonic Balance method for regime change prediction using Francis-99 test case
Authors: Cvijetić Gregor , Čulić Luka , Jasak Hrvoje 
Published: August 2019

Abstract
An efficient method for predicting the turbine start-up and shut-down flow parameters is presented in this paper. Due to start-up or shut-down usually lasting a large number of periods, simulations of such processes are highly demanding and long lasting. To alleviate this, a modified Harmonic Balance method is used, thus casting a problem into spectral space and solving start-up and shut-down simultaneously, as a complete period. By doing this, the results are obtained in a fraction of time required by time-accurate simulation. Furthermore, the same approach could be used for any change of regime from operating point OP1 to operating point OP2 and back to OP1. The method is implemented in foam-extend and suitable for solving incompressible turbulent Navier–Stokes equations. Validation is performed on two test cases: a simple 2D pump case for initial validation, followed by a Francis turbine. Francis turbine test case and experimental data are provided by the Francis-99 Workshop. For Francis turbine the power curve is assembled and compared with experiment.
Reliability study of U-type multistage interconnection networks
Authors: Stergiou E , Liarokapis D , Glavas E , Angelis C , Margariti S V 
Published: August 2019

Abstract
Multistage Interconnection Networks (MINs) are used in wide applications of multiprocessor systems in order to set up connections between various nodes such as processors and memory modules. Reliability can be considered as one of the most challenging issues in these systems because this can degrade or cancel the network performance and consequently the effort of the whole system. Here, a type of multistage fabric called U-type is selected for study, particularly in terms of its reliability. This fabric turns out to be the most appropriate type for constructing parallel systems due to the particular features that it possesses. This study reveals that U-type fabrics are ideal devices as they present mostly high values of reliability and low values of latency compared to unidirectional fabrics. This behaviour becomes more intensive when it is used in a cluster that demands service that includes a high percentage of “local type traffic.” Thus, U-type multistage devices can considerably enhance the connection points in constructing parallel systems, improving internal data flows.
Structural Reliability of Dapped End Beams with Different Reinforcement Layouts under Dynamic Loading
Authors: Syed Z I , Kewalramani M , Hejah E S 
Published: August 2019

Abstract
Reinforced concrete Dapped End Beams (DEB), also known as half-joints, are used in bridges and many other pre-cast constructions to reduce end depth and increase lateral stability. Dapped end beams are expected to experience dynamic loads when used in bridges, the available past studies on the behavior and damage assessment of DEBs are mainly for static loading. The reinforcement layouts of DEBs can influence the behavior of these shear critical members under impact loading. Better understanding of the crack propagation and failure patter of DEBs under dynamics loads is required for safe and economic design of these structural elements. A non-linear numerical transient study was conducted to investigate the dynamic performance of DEBs with different reinforcement layouts. Advanced material models capable of including strain-rate effect and material non-linearity to capture realistic behavior of DEBs were used. The simulated models in finite element package LS-DYNA were verified and used to conduct detailed parametric study to investigate the impact behavior of DEBs with different reinforcement layouts. Sensitivity of concrete compressive strength, main dapped end reinforcement and special shear reinforcement detailing on the structural reliability of DEBs were studied.