bluuebunny/crossref_metadata_2025_split huggingface dataset:
First-principles equation of state of liquid hydrogen and dissociative transition
Authors: Tian Chunling , Liu Fusheng , Yuan Hongkuan , Chen Hong , Gan Yundan 
Published: September 2020

Abstract
The properties of dense hot hydrogen, in particular the phase transition between the molecular insulating and atomic conductive states, are important in the fields of astrophysics and high-pressure physics. Previous ab initio calculations suggested the metallization in liquid hydrogen, accompanied by dissociation, is a first-order phase transition and ends at a critical point in temperature range between 1500 and 2000 K and pressure close to 100 GPa. Using density functional theoretical molecular dynamics simulations, we report a first-principles equation of state of hydrogen that covers dissociation transition conditions at densities ranging from 0.20 to 1.00 g/cc and temperatures of 600–9000 K. Our results clearly indicate that a drop in pressure and a sharp structural change still occur as the system transforms from a diatomic to monoatomic phase at temperatures above 2000 K, and support the first-order phase transition in liquid hydrogen would end in the temperature about 4500 K.
A weak fault diagnosis scheme for common rail injector based on MGOA-MOMEDA and improved hierarchical dispersion entropy
Authors: Yun Ke , Chong Yao , Enzhe Song , Liping Yang , Quan Dong 
Published: September 2020

Abstract
Aiming at the problem that the common rail injector’s early fault characteristics are very weak and susceptible to random noise and other signal interference, this paper proposes a new common rail injector weak fault diagnosis method based on multipoint optimal minimum entropy deconvolution adjusted based on modified grasshopper optimization algorithm optimization algorithm (MGOA-MOMEDA), improved hierarchical dispersion entropy, and least square support vector machine. First, the fault period T is determined using the multipoint kurtosis spectrum. Through the MGOA optimization algorithm, the optimal filter length L of MOMEDA is obtained adaptively, and the optimal performance filter is used for filter processing. Then, improved hierarchical discrete entropy is used to measure the complexity of the filtered fuel pressure signal to extract weak fault features. Finally, the fault feature vector is input into the LS-SVM multi-classifier to realize the weak fault diagnosis and recognition of the common rail injector. Through experimental verification, the proposed method can effectively achieve the weak fault diagnosis of the common rail injector.
A measurement method for tooth surface errors of straight bevel gears based on 3D model
Authors: Li Tianxing , Li Yulong , Deng Xiaozhong , Li Jinfan 
Published: September 2020

Abstract
Due to the inconsistency between a theoretically designed tooth surface and the actual measured reference surface, the tooth surface error data obtained by the traditional measurement method is unreliable, and incorrectly reflects the machining accuracy of straight bevel gears. This has become a key problem in the current measurement process, and needs to be resolved. In this paper, a new measurement method is proposed to achieve accurate measurement and evaluation of the machining error of straight bevel gears. The 3-dimensional (3D) model surface designed by the manufacturer is directly extracted as a theoretical reference to complete the measurement, which ensures the correctness of the error results. A measurement strategy of normal rotation of the measured point is adopted to make up for the disadvantages of the one-dimensional (1D) probe and improve the measurement accuracy. The problem of the sensitive direction of the probe deviating from the normal direction is compensated for by increasing the dimension of the 1D probe and reducing the dimension of the 3D normal. According to the constructed error calculation model, the minimum tooth surface error is obtained through reconstruction and optimal matching techniques. Finally, the accuracy and effectiveness of the measurement method are verified through measurement comparison experiments. This method solves the technical problem of the inconsistency of the measured reference surface, and uses a low-cost 1D probe to achieve precise measurement of the 3D surface. It not only improves the disadvantages of current measurement methods, but also provides effective technical support for other gear measurements.
Hierarchical cage-frame type nanostructure of CeO2for bio sensing applications: from glucose to protein detection
Authors: Mandal Debabrata , Biswas Sudipta , Chowdhury Ananya , De Debajyoti , Tiwary Chandra Sekar , Gupta Amar Nath , Singh Trilok , Chandra Amreesh 
Published: September 2020

AbstractSelf-assembled hierarchical nanostructures are slowly superseding their conventional counterparts for use in biosensors. These morphologies show high surface area with tunable porosity and packing density. Modulating the interfacial interactions and subsequent particle assembly occurring at the water-and-oil interface in inverse miniemulsions, are amongst the best strategies to stabilize various type of hollow nanostructures. The paper presents a successful protocol to obtain CeO2hollow structures based biosensors that are useful for glucose to protein sensing. The fabricated glucose sensor is able to deliver high sensitivity (0.495μA cm−2nM−1), low detection limit (6.46 nM) and wide linear range (0 nM to 600 nM). CeO2based bioelectrode can also be considered as a suitable candidate for protein sensors. It can detect protein concentrations varying from 0 to 30µM, which is similar or higher than most reports in the literature. The limit of detection (LOD) for protein was ∼0.04µM. Therefore, the hollow CeO2electrodes, with excellent reproducibility, stability and repeatability, open a new area of application for cage-frame type particles.
Cross-field transport in detached helium plasmas in Magnum-PSI
Authors: Tanaka H , Hayashi Y , Kajita S , van der Meiden H J , Yoshikawa M , Vernimmen J W M , Scholten J , Classen I , Morgan T W , Ohno N 
Published: September 2020

Abstract
In this study, enhanced radial transport in a volume-recombining region in detached helium plasmas in a linear device, Magnum-PSI, was investigated. By installing a reciprocating Langmuir probe, electrostatic fluctuations with high spatiotemporal resolutions were measured and analyzed. As a result, the ion-flux profile broadening in the detached state and the coherent plasma structure, which has an internal electric field in the azimuthal direction, were confirmed. By analyzing the emission intensities obtained with a fast framing camera viewing around the probe head, an enhanced fluctuation, which has an azimuthal mode number of m = 1, was found to be correlated with radial plasma ejection. This m = 1 mode rotates by the drift with the radial electric field and magnetic field and is correlated with the m = 0 mode. These two modes behave like a predator and prey; they quasi-periodically appear with about a quarter-period shift. Because the ion flux flowing into the target plate decreases when the radial transport is enhanced, this cross-field transport disperses the ion flux and decreases the maximum heat load applied to the target.
Linearity/intermodulation distortion analysis of tunneling and thermionic emission mechanisms; design proposal and high frequency investigation
Authors: Yadav Shivendra , Khare Anuj , Anju  , Mishra Guru Prasad , Aslam Mohd. 
Published: September 2020

Abstract
The article provides an opportunity to study the linearity/intermodulation distortion, radiofrequency, and internal physical behavior of a device when the thermionic emission and tunneling transport are brought together. Thermionic emission is arranged vertically in the channel by an additional electron source (AES) along with the conventional horizontal tunneling in an electrically doped tunnel field-effect transistor (C-ED-TFET). The combined mechanism (tunneling and thermionic emission) offers a drastic improvement in the linearity parameters of the C-ED-TFET. In addition, the combined mechanism of carrier transport offers not only better linearity but also drastically improved DC and radiofrequency characteristics compared with the individual phenomena. It is obvious that thermionic emission carrier transport leads to higher leakage current compared to pure tunneling; hence, the presence of an AES causes a rise in the leakage current. Therefore, in the final state of the art work-function engineering is applied at the control gate that offers a reduction in the leakage current (1× 10−18 A µm–1) due to the formation of a potential well in the channel region in the OFF state. Moreover, the final proposal also possesses a short drain electrode, which is beneficial for suppressing the negative conductance (inherent issue) of the TFET.
VIPER: an industrially scalable high-current high-temperature superconductor cable
Authors: Hartwig Zachary S , Vieira Rui F , Sorbom Brandon N , Badcock Rodney A , Bajko Marta , Beck William K , Castaldo Bernardo , Craighill Christopher L , Davies Michael , Estrada Jose , Fry Vincent , Golfinopoulos Theodore , Hubbard Amanda E , Irby James H , Kuznetsov Sergey , Lammi Christopher J , Michael Philip C , Mouratidis Theodore , Murray Richard A , Pfeiffer Andrew T , Pierson Samuel Z , Radovinsky Alexi , Rowell Michael D , Salazar Erica E , Segal Michael , Stahle Peter W , Takayasu Makoto , Toland Thomas L , Zhou Lihua 
Published: September 2020

Abstract
High-temperature superconductors (HTS) promise to revolutionize high-power applications like wind generators, DC power cables, particle accelerators, and fusion energy devices. A practical HTS cable must not degrade under severe mechanical, electrical, and thermal conditions; have simple, low-resistance, and manufacturable electrical joints; high thermal stability; and rapid detection of thermal runaway quench events. We have designed and experimentally qualified a vacuum pressure impregnated, insulated, partially transposed, extruded, and roll-formed (VIPER) cable that simultaneously satisfies all of these requirements for the first time. VIPER cable critical currents are stable over thousands of mechanical cycles at extreme electromechanical force levels, multiple cryogenic thermal cycles, and dozens of quench-like transient events. Electrical joints between VIPER cables are simple, robust, and demountable. Two independent, integrated fiber-optic quench detectors outperform standard quench detection approaches. VIPER cable represents a key milestone in next-step energy generation and transmission technologies and in the maturity of HTS as a technology.
Impact of interface-state formation on the charge-carrier dynamics at organic-metal interfaces
Authors: Marks M , Armbrust N , Güdde J , Höfer U 
Published: September 2020

Abstract
We study the role of electronic interface states on the electron transfer dynamics between layers of the organic semiconductor 3,4,9,10-perylene-tetracarboxylic acid dianhydride (PTCDA) and the (111) and (100) surfaces of silver. For this purpose, we investigate the change of the decay dynamics of the first (n = 1) image-potential state on these surfaces upon adsorption of an ordered monolayer of PTCDA by means of time-resolved two-photon photoemission (2PPE). We find that the already short lifetime of the (n = 1)-state on Ag(111) is only slightly further reduced by PTCDA adsorption, whereas a much stronger reduction by a factor of three is observed for adsorption on Ag(100) resulting in similar lifetimes for both orientations. We show by model calculations on the basis of an analytical one-dimensional pseudo-potential that the enhanced decay for PTCDA/Ag(100) can be attributed to the opening of an additional channel for electron-electron scattering by the formation of an interface state which is derived from the Shockley-type surface resonance of Ag(100).
Simulating extremal temporal correlations
Authors: Spee Cornelia , Budroni Costantino , Gühne Otfried 
Published: September 2020

Abstract
The correlations arising from sequential measurements on a single quantum system form a polytope. This is defined by the arrow-of-time (AoT) constraints, meaning that future choices of measurement settings cannot influence past outcomes. We discuss the resources needed to simulate the extreme points of the AoT polytope, where resources are quantified in terms of the minimal dimension, or ‘internal memory’ of the physical system. First, we analyze the equivalence classes of the extreme points under symmetries. Second, we characterize the minimal dimension necessary to obtain a given extreme point of the AoT polytope, including a lower scaling bound in the asymptotic limit of long sequences. Finally, we present a general method to derive dimension-sensitive temporal inequalities for longer sequences, based on inequalities for shorter ones, and investigate their robustness to imperfections.
Safety Analysis of Mooring Hawser of FSO and SPM Buoy in Irregular Waves
Authors: Asmara I P S , Sumardiono  , Wibowo V A P 
Published: September 2020

Abstract
This paper provides a method to analyze the safety factor of the hawser line between Floating Storage Offloading (FSO) and Single Point Mooring (SPM) by using motions simulation. The simulation was conducted based on irregular wave arrival for 1 year and 100 years. A case study for a mooring system of a 55,081 tons displacement of FSO tanker to a 360 tons displacement of SPM buoy was simulated with the existing hawser line length of 45 m and the new hawser line length of 70 m. The wave forces and moments are computed using Ansys Aqwa based on the 3D Panel Method both in the frequency domain and time domain. The wave periods are 6 s and 8 s for the 1-year and 100-year data, respectively. The safety factor of the hawser line significantly improves by using the new hawser line.
Experimental Study of Collector Performance Solar Air Heater with Dimple Staggered Arrangement On A V-Corrugated Absorber Plate
Authors: Neno S , Ichsani D 
Published: September 2020

Abstract
The energy crisis is currently the world’s major issue in recent decades. The use of energy is almost in all aspects and all human activity depends on energy. For now, the world’s energy consumption is still in dominance by fossil energy (petroleum, gas, and coal). Given the limited supply of energy sources, the energy alternative that can be utilized is solar energy. Solar energy utilization technology can be distinguished into two namely the conversion of solar energy into electricity through solar cells, and the utilization of solar heat using solar collectors for drying. This study discusses the influence of the Absorber plate of V-Corrugated dimple form with a staggered arrangement against the performance of solar collectors. The diameter of a dimple on the absorber plate measuring 5, 7, 9 mm. Experiments using halogen lamps with radiation intensity varying from 431; 575; 718 W/m2 and varying mass flow rate of 0.001; 0.002; 0.004; 0.006 kg/s. The results obtained are the magnitude of useful energy that is absorbed by the working fluid of solar collectors directly proportional to the increase in mass flow rate and radiation intensity. For the V-Corrugated absorber plate with a diameter of a 9 mm dimple, the highest Qusefull is achieved at a mass flow rate of 0.006 kg/s with a radiation intensity of 718 W/m2 of 65.9 W and the highest efficiency of 65.7 % achieved at a mass flow rate of 0.006 kg/s with radiation intensity of 718 W/m2.
A Study of the effectiveness Fin Stabilizer on Unsada Water Tour Bus to Comfort the Rolling Period to Support Toba Lake Tourism
Authors: Moganti V D , Garetno R E , Irvana R , Fadillah A 
Published: September 2020

Abstract
Lake Toba is one of the five super priority national tourist destinations. To support Lake Toba tourism. a suitable and safe mode of transportation is needed and to be able to provide an attraction for tourists. See this opportunity. we plan to make this mode of transportation. The Air Unsada Tourism Bus is one of the modes of transportation that is a pioneer of new modes of tourism transportation in Indonesia. especially on Lake Toba. North Sumatra. The Unsada Water Tourism Bus is an amphibious bus that can move both on land and in water. The Unsada Air Tour Bus is specially designed using fin stabilizers on the bus body. like the hull of a ship in general. The purpose of this research is to design a Water Tourism Bus that can provide comfort and safety for tourists. in this case that is how to minimize the rolling time on the Air Unsada Tourism Bus to pay attention to the condition of Lake Toba’s waters which is quite extreme. In designing this bus using the dimensions of a conventional bus with a length of 13.115 meters. 2.5 meters wide. As high as 3.8 meters. and a double decker used for the roof so that tourists can enjoy views of Lake Toba. The method used for the calculation is IMO stability level 2 and also uses Indonesian land transportation regulations contained in government regulation no 55 chapter 3 part 3d 2012. For calculations and analysis using the Maxsurf software. Meet the IMO standard parametric rolling level 2. The results obtained are 0,000239 below the 0.06 standard.
Application of BLOCPLAN algorithm as liquified natural gas (LNG) regasification terminal design method
Authors: Ulfauzi Z , Artana K B , Handani D W 
Published: September 2020

Abstract
In the layout design of buildings using applications, such as in the fields of civil engineering, shipping, architecture, there are many design algorithm systems that have been developed. Design algorithm is an approaching method in design where the computer system has been processed with several formulas to produce designs automatically and efficiently. In this paper the researcher try to use one of the design algorithm to designing the LNG terminal layout, called BLOCPLAN algorithm. The BLOCPLAN algorithm is used to improve the efficiency of space utilization and facility placement. BLOCPLAN works by generating several terminal layouts with a direct appraisal system. A most efficient design will be selected from generated designs after re-analysis process. By using the BLOCPLAN algorithm the pipe length used in terminal will be less so it will be more cost-effective. In determining the main terminal facilities, Excel Solver is also used to choose the best scenario with low investment capital. Design algorithm system can effectively support the recommendation process of a more comprehensive layout design. This research is expected to facilitate the designers work because by using this method the designer no longer need to carry out complex processes from the initial stage of design.
A Gas Infrastructure Pathways in East Java Using System Dynamic Approach
Authors: Haekal M , Artana K B , Handani D W 
Published: September 2020

Abstract
As a developing country, Indonesia has been consuming energy with 114 Million Ton Oil Equivalent (MTOE) and estimated that the demand for energy will increase up to 167,4 MTOE in 2050 by Indonesian Energy Ministry. It is also estimated that natural gas will play the role in fulfilling the energy demand in Indonesia. However, in utilizing the natural gas spread of the regions, Indonesia still lack of natural gas infrastructures. As natural gas infrastructures are playing a vital role on those problems, the condition of supply demand, capacity of infrastructure and the effectiveness of the route need to be adjusted and considered. In this study, system dynamic method is employed in order to forecast the supply and demand of natural gas in East Java Province. In addition, a simulation is carried out to optimize and simulate the scenario model of the natural gas infrastructure at certain time-year period. With the constraint and condition given to the system dynamics, a supply-demand condition in East Java area that mainly comes from electrical power generation, industry and household is assessed. Based on developed scenarios, the model is expected to fulfil the needs of natural gas in East Java. The possibility of establishing new LNG terminal in certain location or expanding the capacity of existing facilities are also considered in this study.
Analysis of Automation Implementation in Indonesia Container Terminal
Authors: Pamungkas B , Saut Gurning R O 
Published: September 2020

Abstract
Indonesia container terminals have several prospect factors in implementing automation. Consider that condition, this paper provides automation parameters the are used to measure the container terminal readiness to implement automation. Those parameters also sorted out using Best-Worst Method and assisted by the experts in weighting the parameters. The four parameters in sequence order are container throughput, yard capacity, investment cost, and environment management. Besides, Indonesia container terminals must handle several constraint factors in implementing automation such as automation requires high investment, low return investment, labor conflict, incapability of Indonesia electric provider, and Human resource in Indonesia still abundant.
The Effect of Bulbous Bow on the Probability of Slamming on Hull (Case Study on Container vessel 4200 DWT)
Authors: Mustain M , Siswanti H , Islam M 
Published: September 2020

Abstract
One of the environmental factors that influence the probability of a ship accident is the wave height. Extreme wave height can cause the bow of the ship crashing on the surface of the sea water (slamming). Slamming can cause local buckling and deformation on the ship’s bottom plate at the bow. At certain conditions the slamming can cause damage to the ship’s bow structure. This research discussed the effect of using bulbous bow on slamming probability on 4200 DWT container vessel. The analysis was carried out at 1.5 - 3 meter wave height conditions, according to the wave height conditions on this ship’s shipping route in Makassar Strait. The geometrical dimension is LPR = 2.116 m, BB = 2.805 m and ZB = 2,42 m. The analysis of the motion response of the ship is carried out on two types of motion heaving and pitching. In maximum draft conditions, 5.5 meters and speed 11.9 knots (6.12 m/s) and a heading angle of 180°. The next step is calculation of response spectrum by multiplying the wave spectrum with RAO. From the analysis, known that higher wave produced greater response of heaving and pitching motion. And also higher wave produced higher relative bow motion spectrum. The probability of slamming of 4200 DWT ships with bulbous bow is smaller than without bulbous bow. At a certain wave height (2-3 meters) indicates that the bulbous bow reduces the slamming probability approximately 17-49%. The intensity slamming per hour of 4200 DWT ships with bulbous bow is smaller than without bulbous bow. It is indicates that the bulbous bow reduces the slamming intensity per hour approximately 24-45%.