bluuebunny/crossref_metadata_2025_split huggingface dataset:
A diagnostic of the orbital spectrum of LS 5039 with Fermi-LAT
Authors: Chang Zhi , Zhang Shu , Chen Yu-Peng , Ji Long , Kong Ling-Da 
Published: December 2019

Abstract
LS 5039 is a well-known γ-ray binary system which consists of an unknown compact object and a massive companion O star. It shows rather stable emissions at high energies over years and hence serves as an ideal laboratory to investigate the emission mechanism for such peculiar systems which emit prominent γ-rays. To this end, we take the orbital phase resolved energy spectrum as observed by Fermi-LAT over 10 years. We divide the orbit into four orbital phases, each with an orbital phase range of 0.25, centered at 0.00, 0.25, 0.50 and 0.75 respectively, where the phase 0.0 is the periastron and phase 0.5 is the apastron. The phases around 0.25 and 0.75 are symmetric and hence are supposed to have identical local acceleration environment. The spectral analysis shows that the Fermi-LAT spectra are largely different from these two symmetric orbital phases: the emission from orbital phase 0.25 turns out to be significantly stronger than that from 0.75. This result does not fit a scenario that γ-rays are Doppler boosted emission from bow shock tails if LS 5039 has a shock configuration similar to PSR B1259-63, and indicates that the inverse Compton scatterings between the shock accelerated plasma and the stellar particle environment is the underline procedure. We also find that the previous report for a disappearance of the orbital modulation at 3–20 GeV is due to the similar spectral turn-over energies of the different orbital phases. The spectral properties of periastron and apastron regions are addressed in the context of the measurements in phase regions around 0.25 and 0.75.
Probing star formation and feedback using CCOSMA and archival data in the CFG028.68–0.28 quasi-sinusoidal filament
Authors: Xu Jin-Long , Stutzki Jürgen , Wu Yuefang , Guan Xin , Wang Jun-Jie , Miller M. , Chen Yang , Qin Sheng-Li , Wang Jun-Zhi , Ning Chang-Chun , Danzengluobu  , Chen Tian-Lu , Yu Nai-Ping , Zhang Chuan-Peng , Liu Xiao-Lan , Li Jian-Bin , Jacobs Karl , Graf Urs U. , Xu Gang , Li Nan , Zhang Guo-Yin , Wu Qi 
Published: December 2019

Abstract
We have performed a multi-wavelength study toward a quasi-sinusoidal filament (CFG028.68–0.28). A new large-scale 12CO J = 3 – 2 map was obtained from the China-Cologne Observation for SubMillimeter Astronomy (CCOSMA) 3m radio telescope. Based on the ATLASGAL catalog, we have identified 27 dust clumps in the filament. Through the relationship between the mass and radius of these clumps, 67% of these clumps are dense and massive enough to potentially form massive stars. The obtained CFE is ∼11% in the filament. The filament has a linear mass density of ∼305 M
⊙ pc−1, which is smaller than its critical mass to length ratio. This suggests that the external pressure from the neighboring H ii regions may help prevent the filament from dispersing under the effects of turbulence. Comparing the energy injection from outflows and H ii regions in the filament, the ionization feedback from the H ii regions can help maintain the observed turbulence.
Estimation of the elastic thickness over ancient Mare Moscoviense
Authors: Zhong Zhen , Yan Jian-Guo , Zhang Teng , Xiao Zhi-Yong , Palmero Rodriguez Jose Alexis 
Published: December 2019

AbstractThe Moscoviense basin is an atypical lunar impact basin with concentric rings of positive and negative gravity anomalies. This basin can provide insights into the inhomogeneous thermal activities across the farside of the Moon. Based on an updated spherical harmonic thin elastic-shell loading model, we used localized admittance analyses to estimate the elastic thickness as well as other associated selenophysical parameters for the Moscoviense basin. The high precision gravity and topography data employed in our estimation were collected by the Gravity Recovery and Interior Laboratory and the Lunar Orbiter Laser Altimeter missions. Our results indicate that the crust-mantle interface is mainly compensated by the prefilling depth rather than the observed surface topography. The results constrained within two standard deviations yielded a small load ratio (∼0.168), a best-fit crustal thickness of 36.2 km, and an optimized crustal density of 3159.5 kg m−3. Such large density approaches the density of olivine-rich mantle materials, implying that the excavation of the Mare Moscoviense occurred during a basin-forming impact. The inversed elastic thickness at Mare Moscoviense was around 18 km, lower than the previous results (∼60 km) found over Mare basins on the lunar nearside. These results indicate that extreme thermal activity existed during the Moscoviense basin-forming period such as reheating mechanisms from a double-impact process and mare volcanism.
Seasonal tropospheric cooling in Northeast China associated with cropland expansion
Authors: He Yaqian , Lee Eungul , Mankin Justin S 
Published: December 2019

Abstract
Large-scale agricultural expansion can influence near-surface climate by altering surface energy fluxes, water, and albedo. It is less clear whether such effects extend through the full troposphere and how such effects vary in time. Here we use a novel dataset documenting the massive land use and land cover change due to agricultural expansion in Northeast China from 1982 to 2010 to assess how such expansion has influenced climate over the full troposphere. Confronting our land classification and climate data with a number of statistical approaches (linear regression, correlation analysis, Granger-causality), we find that cropland significantly increased by ∼28% over the near 30 year period in Northeast China-an average rate of nearly a percentage per year. This massive 30 year agricultural expansion is tightly associated with near-surface cooling identified in station data during the late growing season (August to September). Assuming no cropland expansion over the 30 year period, surface temperature would have increased by 0.93 °C ± 0.4 °C. Furthermore, the fingerprint of cropland-associated cooling extends upward into the atmospheric column, influencing the vertical structure of the regional troposphere and potentially its circulation. For every 10 percentage points increase in cropland fraction over Northeast China, regional full-troposphere temperature and geopotential height significantly decrease by 0.2 °C–0.6 °C and 20 m–80 m, respectively. These observed relationships are remarkably coherent across datasets, methodological choices, atmospheric levels, and theory, suggesting that the observational effects we identify are robust and imply the possibility of detectable land use change effects on regional circulation, with potential consequences for the East Asian monsoon.
The effect of organic and inorganic fertilizer applications on N, P-uptake, K-uptake and yield of sweet corn (Zea mays saccharata Sturt)
Authors: Sofyan E T , Sara D S , Machfud Y 
Published: December 2019

Abstract
This study was conducted to evaluate the effect of organic fertilizer (i.e. cow manure) and inorganic fertilizer application on nutrient uptake and yield of sweet corn (Zea mays saccharata Sturt). Inceptisols possesses low soil fertility and relatively low to moderate level of organic matter content. Application of organic fertilizer in combination with inorganic fertilizers is expected to increase N, P and K uptake and yield of sweet corn. This study has been conducted from October 2018 to February 2019 at the Field Experiment of Agriculture Faculty, Universitas Padjadjaran, Jatinangor, West Java. The study was performed in a Randomized Block Design consisting of 10 treatments and 3 replications. The treatments were as follow: A = Control, B = Standard NPK, C = 0 NPK + 1 organic fertilizer, D = ¼ NPK + 1 organic fertilizer, E = ½ NPK + 1 organic fertilizer, F = ¾ NPK + 1 organic fertilizer, G = 1 NPK + 1 organic fertilizer, H = ¾ NPK + ¼ organic fertilizer, I = ¾ NPK + ½ organic fertilizer and J = ¾ NPK + ¾ organic fertilizer. The results showed that the treatment I (¾ NPK + ½ organic fertilizer) resulted the highest N, P and K uptake, i.e. 52.11 mg plant−1; 80.85 mg plant−1 and 54.17 mg plant−1, respectively and the heaviest weight of sweet corn of 400.15 g.
Growth performance and metal concentration of rice (Oryza sativa l.) grown in three different soils amended with fly ash
Authors: Priatmadi B J , Septiana M , Saidy A R 
Published: December 2019

Abstract
Fly-ash is largely alkaline in nature and contains many essential elements for plant growth along with toxic metals. Therefore, fly-ash is frequently applied for improving soil fertility. In this experiment, we studied growth performance of rice grown in three different soils (swampland, peatland, and irrigated-rice soils) amended with 20 ton fly-ash per hectare in the green-house experiment. The concentrations of metals in rice straw and grain were also measured at the end of the experiment. Result of soil analyses showed that the most distinctive property of soils used this experiment was the content of organic carbon (OC). The experiment also showed that fly-ash application significantly increased the number of rice tiller and dried-rice straw weight in peatland soils and rice production in swampland and peatland soils. Concentrations of aluminium (Al), lead (Pb), nickel (Ni), cadmium (Cd) and chromium (Cr) in the rice straw and grain of peatland soil were not influenced by fly-ash application. Results obtained in this study suggest that the effect of low level of fly-ash application on the growth performance and toxic element concentrations of rice cultivated in different soils is controlled by the OC contents of those soils.
Abundance and diversity of soil mesofauna under tillage system in maize plantation at Ultisols soil
Authors: Niswati A , Pangaribuan Y A L D J , Lumbanraja J , Arif M A S 
Published: December 2019

Abstract
Intensification land use with the conventional tillage can bring effects in the soil biodiversity. One of important organisms in soil is soil mesofauna that has an important role in decomposition of organic matter. This research aimed to study the effect of minimum tillage and full tillage on the abundance and diversity of soil meso fauna. The treatments were consisted of soil tillage (minimum tillage and full tillage) and herbicide (with and without herbicide Glifosat 2,4-D) with four replications. The location of this research have soil organic-C and total-N classified in the low criteria. The results show that the application of minimum tillage to prepare maize plantation reached significantly lowest abundance of soil mesofauna compared to full tillage in vegetative phase of maize sampling, however it was not significantly different between minimum tillage and full tillage if it combined with herbicide. Diversity index in full tillage were significantly higher that that in minimum tillage, on the contrary, the dominance index of soil mesofauna were not significantly different between tillage system. On the generative phase, there were no differences on the abundances of soil mesofauna between tillage sistem. There were three dominant mesofauna orders, namely Acarina, Collembola, and Diplopod.
Dynamics of nitrogen nutrients in lowland soils with some irrigation conditions to increase rice crop productivity
Authors: Annisa W , Sosiawan H 
Published: December 2019

Abstract
The level of water management influenced the efficiency of N-Urea fertilization for rice plants because rice plants could utilize only about 30-40% of the N fertilizer and the rest would be lost. The use of 15N isotope was one method to predict the movement of nitrogen from fertilizers. The objectives of this study were to study the dynamics of N nutrients in soil and plants with N-isotopes and to calculate the efficiency of water use in upland rice plants. This study used a Split Plot Design with the first factor level of water management and the second was N dose level. The N fertilizer was Urea fertilizer which was given an N15 tracer. P and K doses were determined based on soil nutrient status. The rice plants were Situpatenggang and DT15 Batan. The results of the study showed that soil water management with conventional irrigation was significantly better than cut irrigation. The maximum dose of N fertilizer in interrupted irrigation was reached at a dose of 228 kg/ha, and conventional irrigation doses reached 180 kg N/ha. Whereas the maximum dosage of N fertilizer in interrupted irrigation treatment was 198 kg/ha and conventional irrigation treatment was 159 kg N/ha.
Landscape planning of tobacco plantation based on erosion potential in Eastern Region of Mount Sindoro Temanggung
Authors: Budiyanto G , Aini L N , Setyawan H 
Published: December 2019

Abstract
Mount Sindoro slope is a tobacco plantation area. Based on variations in slope, there is erosion potential on most of the slopes. This study aimed to determine the way of structuring tobacco plantations in the eastern region of Mount Sindoro due to intensive land use. This research was conducted in Gunungsari Village, Bansari District, Temanggung Regency, from April to July 2018. This research was conducted using a survey method and continued with the determination of the level of soil erosion potential on area A (more than 20% slope), area B (15-20%slope) and area C (less than 15% slope) using USLE method. Landscape planning was carried out based on the application of land conservation methods with the main purpose of reducing the level of erosion potential using agronomic and mechanical methods. The results show that the actual erosion potential of area A, B and C is 42.67 tons/ha/year, 44.81 tons/ha/year and 31.80 tons/ha/year, respectively, and is categorized as moderate to severe erosion level. The application of agronomic methods in the form of intercropping systems of tobacco and peanuts could reduce the erosion potential from 42.67 to 32.43 tons/ha/year (area A); from 44.81 to 33.61 tons/ha/year (area B) and from 31.80 to 23.85 tons/ha/year (area C). Meanwhile, the application of the ridge terraces and bench terraces, consecutively, reduced erosion potential from 42.67 to 6.40 and 1.71 tons/ha/year (area A); from 44.81 to 6.72 and 1.79 tons/ha/year (area B); and from 31.80 to 4.77 and 1.27 tons/ha/year (area C). Thus, it can be concluded that bench terraces is more effective in reducing erosion potential than ridge terraces.
Water content prediction of ‘crystal’ guava using visible-near infrared spectroscopy and chemometrics approach
Authors: Kusumiyati  , Hadiwijaya Y , Putri I E , Mubarok S 
Published: December 2019

Abstract
The purpose of the research was to apply the visible-near infrared (vis-nir) spectroscopy and chemometrics approach to predict the water content of crystal guava rapidly and non-destructively. The absorbance spectra were collected from intact ‘crystal’ guava fruits in wavelength from 381 to 1065 nm. Spectra pre-treatment was used to enhance the prediction accuracy. Several spectra pre-treatment methods were arranged to the original absorbance spectra such as multiplicative scatter correction (MSC), standard normal variate (SNV), second derivative absorbance (d2a), MSC+d2a, and SNV+d2a. Calibration model was developed by partial least squares regression (PLSR). Validation was done by K-fold cross-validation. The results presented that vis-nir spectroscopy combined with chemometrics approach gave accurate water content prediction of ‘crystal’ guava. The best calibration model was provided by spectra pre-treatment of SNV+d2a with coefficient of determination (R2) and ratio performance deviation (RPD) of 0.74 and 1.60, respectively. It concluded that vis-nir spectroscopy and chemometrics approach can be performed to predict the water content of ‘crystal’ guava rapidly and non-destructively by replacing the standard laboratory analysis.
QUALITY OF SIMPLICIAN BIOACTIVE COMPONENTS AND LIQUID EXTRACT OF KECOMBRANG FLOWER POWDER FROM TEMPERATURE AND TIME OPTIMIZATION RESULTS
Authors: Intan Pertiwi Dwiana , Naufalin Rifda , Arsil Poppy , Erminawati  , Wicaksono Rumpoko , Auliya Taslimatul 
Published: December 2019

AbstractKecombrang flower has benefits as an antioxidant and antimicrobial. This capability can be maximized by processing through drying and liquid extraction. In the drying and extraction of liquid, the temperature and time that is not right can affect the content of bioactive components of the product. This study aims to determine the quality of bioactive components of powder and liquid extract of kecombrang flowers quantitatively and qualitatively based on temperature and time. The experimental design used in kecombrang flower powder is a Completely Randomized Design (CRD) with 9 treatment and 3 replication as long as the liquid extract of kecombrang flowers using the Responsse Surface Method (RSM) method with Expert Design 10 software. Central Composit Design (CCD) produced 13 optimization formulas. Factors that were tested on drying are 50°C, 60°C, 70°C, and time is 4, 5 and 6 hours. Liquid extraction temperature is 40oC, 50oC, 60oC and time is 3, 4 and 5 hours. Based on the results of the study the highest total phenol simplisia and liquid extract of kecombrang flowers namely 27.93 TAE1100 g sample and 64.458 mg TAEI100 g. The highest total of flavonoids is simplicia and liquid extract of kecombrang flower which is 2.073 QE1100 g sample and 35.120 mg QE1100 g and pH value (3.9). The compounds in the optimum formula product are phenolic, flavonoids, alkaloids, terpenoids and tannins.
Relationship of Sedimentation Rate to The Structure of Macrozoobenthos Community On Transitional in Ciletuh Bay, Sukabumi District, West Java
Authors: Yuniarti  , Nurul Ihsan Yudi , Harahap Syawaludin A. , Suhanda Delilla 
Published: December 2019

Abstract
Ciletuh is a coastal area located in Sukabumi Regency, West Java, which is currently included in the Geopark region in West Java. Ciletuh is a name of a bay that faces directly to the Indian Ocean, hence the similarity of its ocean characteristic. At present Ciletuh Bay has undergone massive sedimentation due to the large amount of sediment entering the surrounding bay coming from Ciwaru and Cimarinjung River and the existence of many floating net cages around the Ciletuh Bay, all of which empties into Ciletuh Bay. High sedimentation rate will disrupt environmental conditions especially organism found in sediments such as benthos. This research was designed using descriptive analytic methods in the form of field observations to determine the research station, sediment sampling and supporting parameters carried out at the research station point. The study was conducted at 5 sampling stations based on different characteristics. The purpose of this research is to see the relationship between sedimentation rate and structure of the macrozoobenthos community. Result presented that the species dominating the bay areas are Nassarius sp., Cerithium sp. Clypeamorus sp. Rhinodavis sp. Certhiidae, Coralliophila sp., Turricula sp., Olivia caerullea., Thais sp., Phos roseatus, Hemifusus sp. Diplomariza sp, Neritadae, Donax sp., Pyramidella sp., Terebia sp. Sedimentation rate calculated as 0,11 gr/cm2/day; 0,13 gr/cm2/day; 0,07 gr/cm2/day; and 0,3 gr/cm2/day. Based on sediment grain size, types of sediment founded on each station are (1) gravely mud, (2) sandy mud, (3) sandy mud with slight gravels, (4) mud with slight gravels, and; (5) sandy silt.
Key performance indicator of sustainability in the Malaysian food supply chain
Authors: Baba Anis Anizah Mohammad , Ma’aram Azanizawati , Ishak Fatin ‘Izzati , Sirat Rozlina Md. , Kadir Aini Zuhra Abdul 
Published: December 2019

Abstract
The food supply chain in Malaysia plays a significant function in the nation’s economy. Since the industry is dominated by small and medium sized enterprises (SME), the local food supply chain must satisfy consumer demand. In order to help Malaysia to become more self-sufficient, improvements in the supply chain in terms of key performance indicators (KPIs) are important. However, it is common that strategic and operational KPIs are different and a disparity often exists between them. To be more successful for measuring the entire supply chain, the linkage of strategic objectives to operational objectives must be aligned to ensure the appropriate KPIs measure a proper connection between what they do and what the business achieves. The objective of this article is to propose a preliminary key indicator to measure sustainable performance within the perspective of Malaysian food supply chain. Key indicators have been summarized based on the previous researches focusing on the issue between 2007 until 2018. An overall of nine perspectives on sustainable performance measures in the food supply chain involved employee, supplier, health and safety, community, customer, cost effectiveness, quality, compliance and efficiency. These perspectives can be classified into three hierarchies; namely, strategic, tactical and operational. This paper proposes integration of key indicators as a starting point to evaluate the generic performance of Malaysia food supply chain.
Exploring Quality Influencing Factors for Frozen Food Industry
Authors: Aziz Aishah Abdul , Daud Sarbani , Sorooshian Shahryar 
Published: December 2019

AbstractQuality is the grade of excellence or level of acceptability by the buyers. For the frozen food industry, it can be defined as the composite of those features which have significance in determining the level of acceptability by the consumer. This study was to analyse the relationship between storage, transportation, stock control, packaging, and raw material on the quality of frozen food. The research methodology of this work was a combination of observation and interview, and survey from 55 Malaysian frozen-food small-enterprise. From the findings, only two factors, Packaging, and raw material came to significantly and positively affect the quality of the frozen food. The findings of this study could be an asset for food industries to have a better understanding of the quality control of their products.
Nitrogen and group-IV (Si, Ge) vacancy color centres in nano-diamonds: photoluminescence study at high temperature (25 °C–600 °C)
Authors: Zaghrioui Mustapha , Agafonov Viatcheslav N , Davydov Valery A 
Published: December 2019

Abstract
Raman scattering and photoluminescence measurements have been carried out on nano-diamonds containing Nitrogen-vacancy (NV−), Silicon-Vacancy (SiV−) and Germanium-vacancy (GeV−) synthesized by high pressure and high temperature method. Optical zero-phonon-line transition of these negatively charged centres were measured from room temperature up to 600 °C under air. The results show that all nano-diamonds are stable at this temperature range and spectra are reproducible for heating and cooling cycles. Thermal behaviors of linewidth and zero phonon line, for SiV− and GeV− centres, are well described by the second-order electron-phonon interactions involving two-phonon and elastic processes.
Chemical vapor deposition growth and characterization of graphite-like film
Authors: Zhang Yanhui , Shu Haibo , Chen Zhiying , Mu Gang , Sui Yanping , Liang Yijian , Hu Shike , Li Jing , Kang He , Yu Guanghui , Peng Songang , Jin Zhi , Liu Xinyu 
Published: December 2019

Abstract
Thick graphene film can be widely used in surface protection, heat dissipation, heating devices and other fields. Here we present a study on the growth and characterization of large area continuous and patterned graphite-like films prepared on Ni foil through CVD. Effects of parameters on the material growth are studied experimentally and theoretically in detail. Thickness of the graphite-like film in this work can reach 500 nm and can be regulated by growth process. Characterization results show that the graphite-like film is formed by free stacking of large area graphene continuous films and possesses strong mechanical strength, chemical stability, good electrical conductivity and flexibility. The graphite-like film shows potential for application in metal surface protection, flexible conduction, heating and electromagnetic shielding.