bluuebunny/crossref_metadata_2025_split huggingface dataset:
Interaction of ultra relativistic

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fireball beam with plasma
Authors: Shukla N , Martins S F , Muggli P , Vieira J , Silva L O 
Published: December 2019

Abstract

Ab initio simulations of the propagation in a plasma of a soon to be available relativistic electron–positron beam or fireball beam provide an effective mean for the study of microphysics relevant to astrophysical scenarios. We show that the current filamentation instability associated with some of these scenarios reaches saturation after only 10 cm of propagation in a typical laboratory plasma with a density ∼1017 cm−3. The different regimes of the instability, from the purely transverse to the mixed mode filamentation, can be accessed by varying the background plasma density. The instability generates large local plasma gradients, intense transverse magnetic fields, and enhanced emission of radiation. We suggest that these effects may be observed experimentally for the first time.
THz generation from laser-induced breakdown in pressurized molecular gases: on the way to terahertz remote sensing of the atmospheres of Mars and Venus
Authors: Solyankin Peter M , Nikolaeva Irina A , Angeluts Andrey A , Shipilo Daniil E , Minaev Nikita V , Panov Nikolay A , Balakin Alexei V , Zhu Yiming , Kosareva Olga G , Shkurinov Alexander P 
Published: December 2019

Abstract
The present paper studies the generation of terahertz (THz) radiation in CO2 in comparison with atmospheric air at a wide range of pressures. We established experimentally and explained theoretically that for these gases there are optimal pressures at about 1 bar for air and 0.5 bar for CO2 under which the efficiency of conversion from near-infrared to THz frequencies is the highest. We consider the possibility of applying femtosecond laser-induced THz generation for the study of the atmosphere of Mars and found that the overall THz yield near the surface of Mars is just a factor of 6 lower than on Earth. Comparable THz energy on the two planets is associated with underdense plasma on Earth (∼10% of neutrals) and full double ionization of carbon dioxide on Mars (∼200% of neutrals), the latter opening great perspective for THz remote sensing of trace gases in the Martian atmosphere.
QuCAT: quantum circuit analyzer tool in Python
Authors: Gely Mario F , Steele Gary A 
Published: December 2019

Abstract
Quantum circuits constructed from Josephson junctions and superconducting electronics are key to many quantum computing and quantum optics applications. Designing these circuits involves calculating the Hamiltonian describing their quantum behavior. Here we present QuCAT, or ‘Quantum Circuit Analyzer Tool’, an open-source framework to help in this task. This open-source Python library features an intuitive graphical or programmatical interface to create circuits, the ability to compute their Hamiltonian, and a set of complimentary functionalities such as calculating dissipation rates or visualizing current flow in the circuit.
Fractal catastrophes
Authors: Meibohm J , Gustavsson K , Bec J , Mehlig B 
Published: December 2019

Abstract
We analyse the spatial inhomogeneities (‘spatial clustering’) in the distribution of particles accelerated by a force that changes randomly in space and time. To quantify spatial clustering, the phase-space dynamics of the particles must be projected to configuration space. Folds of a smooth phase-space manifold give rise to catastrophes (‘caustics’) in this projection. When the inertial particle dynamics is damped by friction, however, the phase-space manifold converges towards a fractal attractor. It is believed that caustics increase spatial clustering also in this case, but a quantitative theory is missing. We solve this problem by determining how projection affects the distribution of finite-time Lyapunov exponents (FTLEs). Applying our method in one spatial dimension we find that caustics arising from the projection of a dynamical fractal attractor (‘fractal catastrophes’) make a distinct and universal contribution to the distribution of spatial FTLEs. Our results explain a projection formula for the spatial fractal correlation dimension, and how a fluctuation relation for the distribution of FTLEs for white-in-time Gaussian force fields breaks upon projection. We explore the implications of our results for heavy particles in turbulence, and for wave propagation in random media.
Abundance of plastic debris across European and Asian rivers
Authors: van Calcar C J , van Emmerik T H M 
Published: December 2019

Abstract
Plastic pollution in the marine environment is an urgent global environmental challenge. Land-based plastics, emitted into the ocean through rivers, are believed to be the main source of marine plastic litter. According to the latest model-based estimates, most riverine plastics are emitted in Asia. However, the exact amount of global riverine plastic emission remains uncertain due to a severe lack of observation. Field-based studies are rare in numbers, focused on rivers in Europe and North America and used strongly varying data collection methods. We present a harmonized assessment of floating macroplastic transport from observations at 24 locations in rivers in seven countries in Europe and Asia. Visual counting and debris sampling were used to assess (1) magnitude of plastic transport, (2) the spatial distribution across the river width, and (3) the plastic polymer composition. Several waterways in Indonesia and Vietnam contain up to four orders of magnitude more plastic than waterways in Italy, France, and The Netherlands in terms of plastic items per hour. We present a first transcontinental overview of plastic transport, providing observational evidence that, for the sampled rivers, Asian rivers transport considerably more plastics towards the ocean. New insights are presented in the magnitude, composition, and spatiotemporal variation of riverine plastic debris. We emphasize the urgent need for more long-term monitoring efforts. Accurate data on riverine plastic debris are extremely important to improve global and local modeling approaches and to optimize prevention and collection strategies.
Numerical simulation of breeze circulation in Crimea using WRF-ARW model
Authors: Shokurov M V , Kraevskaya N Yu 
Published: December 2019

Abstract
Breeze circulation is an important atmospheric process that affects the weather and climate of coastal regions. Crimea is one of such regions. One of the methods of breeze research is numerical simulation, which has been quite successfully used to obtain information on breeze circulation in various geographical regions. The purpose of this work is to describe the regional features of sea breeze in Crimea, specifically, a breeze circulation near the Crimean Mountains. We use an array of satellite images and data of global operational analysis, NCEP GDAS, to choose a day with a pronounced breeze. A numerical experiment is performed for the day using a mesoscale model, WRF-ARW. Based on the results of the numerical simulation, the structure of the sea breeze circulation in Crimea is described. Some classical elements of the breeze characteristics of the flat part of Crimea are observed. A unique phenomenon of collision of breeze gravity currents has been revealed. It is a characteristic of the rather small land areas. Much attention is given to the features of breeze in the mountains associated with the complex topography.
Deterministic and stochastic parameterizations of kinetic energy backscatter in the NEMO ocean model in Double-Gyre configuration
Authors: Perezhogin P 
Published: December 2019

Abstract
Eddy-permitting numerical ocean models often resolve mesoscale turbulence only partly, which leads to underestimation of eddy kinetic energy (EKE). Mesoscale dynamics can be amplified by using kinetic energy backscatter (KEB) parameterizations returning energy from the unresolved scales. We consider two types of KEB: stochastic and negative viscosity ones. The tuning of their amplitudes is based on a local budget of kinetic energy, thus, they are "energetically-consistent" KEBs. In this work, KEB parameterizations are applied to the NEMO ocean model in Double-Gyre configuration with an eddy-permitting resolution (1/4 degree). To evaluate the results, we compare this model with an eddy-resolving one (1/9 degree). We show that with the KEBs the meridional overturning circulation (MOC), meridional heat flux, and sea surface temperature (SST) can be significantly improved. In addition, a better match has been found between the time power spectra of the eddy-permitting and the eddy-resolving model solutions.
Assessment of the carbon balance of treed bogs under climate change with observation and modelling data
Authors: Dyukarev E A , Martynova Yu V , Golovatskaya E A 
Published: December 2019

Abstract
Carbon dioxide fluxes in treed bogs in the South Taiga Zone of Western Siberia are estimated by using field data and a mathematical model calibrated against observation data. Forecasts of carbon balance under climate change are made by using the mathematical model.
Transboundary aspects of river water pollution and water quality estimation of the Middle Ob river
Authors: Rusak S N , Shornikova E A , Kurilenko M I , Homenushko T I 
Published: December 2019

Abstract
The Middle Ob is the part of the Ob river reach running through the central part of Western Siberia within Khanty-Mansi Autonomous Okrug, and brings its waters through the territory of Yamalo-Nenets Autonomous Okrug to the Gulf of Ob of the Arctic Ocean. The data on hydrochemical characteristics of the Middle Ob river and its anabranches during 2003-2008 and 2014-2018 in aspects of transboundary transfer is presented in the article. Composition of salt, organic compounds, heavy metals, petroleum hydrocarbons, biogenic ions in water and bottom sediments are described. The influence of oilfields and urban territories in water catchment area of the Middle Priobie is revealed. The main pollutants of the Middle Ob river are phenols, hydrocarbons, iron, manganese, chrome, cooper, phosphate-ions from technogenic and natural originating. We investigated that the level of the Middle Ob river water pollution was increased from 2003-2008 till 2014-2018.
Evaluation on the growth of Nannochloropsis sp. from Lampung area in the biogas effluent of tapioca industry
Authors: Juliasih N L G R , Utami S , Setiawan A 
Published: December 2019

Abstract
Evaluation on the growth of Nannochloropsis sp. in the biogas effluent of tapioca industry (MEBIT) has been conducted. The Nannochloropsis sp. that isolated from marine biota in Lampung area was acclimated in the 1, 3, and 6% MEBIT. The evaluation of Nannochloropsis sp. was using cell density at 750 nm, chlorophyll a concentration and biomass yields. The Nannochloropsis sp was growth well in the 6% (v/v) MEBIT based on the color of the culture. The OD of Nannochloropsis sp on MEBIT obtained at 750 nm is about 0.14 to 1.48. The chlorophyll a concentration is about 1.27 to 13.51 mg / mL, whereas the concentration of the biomass is 0.311 g/L with a productivity of 0.019 gL−1 d−1, it is higher than when it cultivates in the standard media (BG 11). The protein content in MEBIT is 30.65%, it is lower than in the BG 11 growth (36.41%) of the dry biomass.
Estimation and optimization of the voyage energy efficiency operational indicator (EEOI) on Indonesian sea tollway corridors
Authors: Ichsan M , Pradana M F , Noche B 
Published: December 2019

Abstract
In this research, the Energy Efficiency Operational Indicator (EEOI) used as emission estimation parameter on three Indonesian’s sea toll way corridors. Operational data of the ships, such as speed, Deadweight Tonnage (DWT), load and load’s utilization are used in this research. Moreover, unavailable operational data are to be assumed with comparable assumptions or suitable calculation. Furthermore, the data are used to calculate the fuel consumption of the voyage, which is the main variable in the emission index calculation. The method, so-called, a ‘slow-steaming’ method is utilized to optimize the emission parameter. The result shows that the slow steaming process is indeed bring more efficient emission result for the sea toll way under consideration. Decreasing the speed to 10% of current speed is decreasing the Fuel Consumption of the ships around 17% to 19% yearly. Decreased it further to 12%, lowered the fuel consumption around 23% from current yearly fuel consumption. Moreover, applying slow steaming with 10% and 12% rate in each route resulted in a decreasing rate of emission produces of around 19% and 23% respectively. These results are encouraging as an initial step to measures the emission level on the Indonesian Sea tollway.
Aging effect condition on hot asphalt mixtures marshall (AC-BC) performance by using slag
Authors: Bethary R T , Subagio B S , Rahman H , Suaryana N 
Published: December 2019

Abstract
The technology of using waste for road construction by using slag as an aggregate substitute can reduce costs as well as environmentally friendly technology. Hot mix asphalt pavement (HMA) will experience aging both short and long term, this study was conducted to see how the effects of aging in hot asphalt mixtures by using slag. There were three types of mixtures in this study with different levels of slag, aging test specimens were conditioned by the AASHTO R30 testing method. The results of testing the slag characteristics with SEM that the slag surface is roughness than the natural aggregate, also the slag has porosity on its surface indicates that the slag has stronger adhesion properties with the asphalt. In hot asphalt mixtures with slags obtained by increasing the slag percentage, the optimum bitumen content will be smaller but if viewed from the optimum Marshall stability value at a slag percentage of 20%. Then the mixture was conditioned for short-term aging with a higher Marshall stability value compared to normal conditions with void in mixture (VIM) values, while for long-term aging the stability value decreased compared to normal conditions with VIM values approaching normal conditions without aging.
The assessment and management of cruise port for tourism destination development in Bali island
Authors: Mandi N B R 
Published: December 2019

Abstract
Bali island has several ports, and three of them are used for ships’ layover. Those ports are: Benoa port in the southern of the island, Celukan Bawang port in the northern part, and Padangbai/Tanah Ampo port in the eastern part; with most of tourism activities are concentrated in the southern part. Disadvantageous management and competition between those ports raised the question and challenge for the cruise port and its nearest vicinity. A cooperation is required to enable those ports to compete more effectively, in attracting tourists and supporting the island’s tourism destination development. This study employed a set of semi-structured interviews (SSI) and the spot field observation in assessing the port’s management for tourism destination’s development. The result of this study is expected to contribute in providing useful information for tourism destination development and for the industry itself, which are constantly growing and attractive for international tourists.
Kinetic and Isotherm Study of Ammonium Sorption Using Natural Zeolites from Lampung
Authors: Kurniawan T 
Published: December 2019

Abstract
The aims of the study were to characterize and investigate the ammonium adsorption kinetic and isotherm of the natural zeolites from Lampung. Characterization of the natural zeolite was performed by using X-Ray Diffraction (XRD), nitrogen-physisorption, Scanning Electron Microscope (SEM) and X-Ray Fluorescence (XRF). According to XRD analysis, the natural zeolites were identified as clinoptilolite dominant phase with some impurities i.e. mordenite and quartz. The surface area calculated by BET model was 45 m2/g. The SEM images showed the irregular morphology shape. The XRF analysis revealed that the ratio Si/Al was 6.2. Ammonium sorption experiment was performed by using 100 ppm of ammonium solution in the batch reactor with variation on natural zeolite mass loading and adsorption time. Ammonium adsorbed onto the zeolites was increased with the adsorption time and mass loading. The kinetic models, i.e. Lagergren’s 1st order, Pseudo 2nd order, Elovich, Intraparticle diffusion, and isotherm models, i.e., Langmuir, Langmuir-Vageler, Freundlich, Temkin were fitted with the ammonium adsorption kinetic data by using non-linear regression analysis in MATLAB.
Utilization of steel slag and fly ash in soil stabilization and their effect to california bearing ratio (CBR) value. (Case study: Kp. Kadusentar road Medong village Mekarjaya Subdistrict Pandeglang District)
Authors: Mina E , Kusuma R I , Ulfah N 
Published: December 2019

Abstract
Road construction is not always on good subgrade, there is possibility being built on subgrade which has low soil bearing capacity which could cause damages such as holes and bumps on the pavement road. One of the parameters to determine soil bearing capacity is Californian Bearing Ratio(CBR) value. This study aims to determine the effect of steel slag and fly ash to soil CBR value and its effect on soil physical properties. Soil samples were taken from Kadusentar Village of Pandeglang District Banten. The method of soil stabilization used percentage variation admixture of 20% fly ash mixed with 0%, 10%, 20% and 30% of steel slag from soil total weight. The analysis results showed that original soil samples can be classified as non-organic clay soil with high plasticity. The CBR laboratory test result showed that variation of 20% fly ash and 20% steel slag with 7 days ripening give the optimum value of CBR increased from 3.524% became 26.14%. The highest CBR value of this mixture can be categorized as good classification of subgrade. Plasticity index value decreased became 4.57% which can be categorized as lowplasticity.
A Study of commercial apartments governance in South Jakarta
Authors: Dessiani Y , Barus L S , Adianto J 
Published: December 2019

Abstract
The magnitude of profit turnover in commercial apartments management, frequently led to the asymmetrical relationship between real estate developers as private sector and apartments’ owners as citizen. This condition was marked by administrative violations which often carried out by real estate developers. Throughout 2018, Ombudsman RI Greater Jakarta Office received various complaints related to the apartments’ management and operation, including conflict of interests and transparancy issues in the Apartments’ Owners and Residents Association (PPPSRS). Following certain policy agenda that had been pushed by several interest groups since 2006, the government attempted to formulate a particular public policy to protect each party involved in the vertical housing operation, especially citizen. Conducted with a qualitative research method, the objective of this study is to examine the implementation of DKI Jakarta Provincial Governor Regulation Number 132 Year 2018 on Management of Owned Apartments (Pergub 132/2018) in Apartemen Taman Rasuna and Apartemen Kalibata City, South Jakarta. This study found that the handover of apartment units that were not accompanied by legal ownership documents clearly impacted the delayed in transition process towards the implementation of Pergub 132/2018.
A Systematic literature review on maritime transportation optimization using linear programming
Authors: Pradana M F , Noche B 
Published: December 2019

Abstract
Maritime transportation has a decisive position in world trade. Along with the development of science and technology, maritime transportation faced more complex and robust problems in term of their optimization. In this paper, we purpose a Systematic Literature Review (SLR) on Maritime Transportation Optimization (MTO) in three-level decision making that is the strategic planning level, tactical planning level, and operational planning level. We also have identified Linear Programming (LP) as a proper preference to study MTO. This SLR using a structured approach that involves bibliometric and network analytics from the articles published during 1976 – 2019. Some of the key findings in this study as follows, (i) research and citation in MTO using LP is rising and reached its peak in 2018; (ii) three countries with the highest number of articles are the United States, Norway, and China; (iii) shows a great opportunity for future research to combine strategic planning, tactical planning, and operational planning.
Travel behavior of commuter line passenger to station in Depok City
Authors: Astuti D W , Barus L S , Achjar N , Martell-Flores H 
Published: December 2019

Abstract
Depok City as one of the satellite cities has developed both in terms of population, social, economic and environment. The high mobility of commuter line passengers is influenced by the pattern of passenger travel using various modes of transportation such as: public transportation, private transportation online transportation, non-motorized vehicles or walking. The analysis used is the multinomial logistic regression method by observing the socio-economic characteristics of passengers and the travel characteristics of commuter line passengers. The results of the study suggest that the behavior of passengers to the station (access mode) is influenced by transport time and costs. And then, most of the commuter line passengers use online transportation as a means to get to the station. So the choice of the most used transportation modes will have an impact on the arrangement of facilities at Depok City stations.
The performance of building construction supply chain: A Case study in building construction project
Authors: Wibowo M A , Handayani N U , Sinaga G , Sholeh M N , Ulkhaq M M 
Published: December 2019

Abstract
Supply chain is the interconnected hierarchy of supply contracts necessary to procure a built asset. On a traditional building project, design consultants are first tier suppliers, working for the client, and the contractor has a supply chain of sub-contractors and specialist suppliers. The problems in the construction industry are that the first and second tier of the supply chain sign up to impartially difficult arrangements but as the chain develops, so the contractual responsibilities decrease until suppliers at the end of the chain are often not locked in at all. The construction of the Diponegoro University Psychology building began September 29, 2017 with a target of 300 days. The deviation between the realization of project work and the planning timeline is -10.37% in the 7th month. The purpose of this study is to evaluate the supply chain process in building construction project. The Supply Chain Operation References (SCOR) is going to be applied to measures the performance of construction projects based on five material planning processes (plan) and project work schedules, material procurement (source), implementation of construction work (make), material delivery (deliver), and the return process if there is a material return (return). The Matrix (OMAX) and Traffic Light method is going to be used to assess the performance of cement and steel structure as the main material on this building project. The results of the assessment with Omax and traffic light obtained that the supply chain performance of cement material is worth 4.3 of the maximum value is 10. Supply chain performance for iron material worth 5.4 from the maximum value is 10. This shows that supply chain performance is quite good but needs repaired.