bluuebunny/crossref_metadata_2025_split huggingface dataset:
Multisymplectic formalism for cubic horndeski theories
Authors: Doniz Mauricio , Gaset Jordi 
Published: June 2023

Abstract
We present the covariant multisymplectic formalism for the so-called cubic Horndeski theories and discuss the geometrical and physical interpretation of the constraints that arise in the unified Lagrangian-Hamiltonian approach. We analyse in more detail the covariant Hamiltonian formalism of these theories and we show that there are particular conditions that must be satisfied for the Poincaré-Cartan form of the Lagrangian to project onto J
1
π. From this result, we study when a formulation using only multimomenta is possible. We further discuss the implications of the general case, in which the projection onto J
1
π conditions are not met.
Manipulation of giant Kerr nonlinearity and Doppler broadening on graphene’s Landau level
Authors: Abbas Muqaddar , Badshah Fazal , Ali Hamad , Munir Akhtar , Ziauddin  , Zhang Pei 
Published: June 2023

Abstract
We propose monolayer graphene system and analyze the effects of giant Kerr nonlinearity and Doppler broadening. The focus is to construct and design experimentally viable model by which we can enhance the group index of the medium so that we have slow group velocity. For obtaining the desired goal, we consider Landau level of graphene monolayer placed perpendicular to magnetic field M Tokman et al (2013, Phys. Rev. lett.
110, 077404). Giant Kerr nonlinearity and Doppler broadening enhance the medium group index greatly, resulting in a slow group velocity that has uses in storage devices, optical buffering, quantum memory, and data processing. We also investigate the behavior exhibited by the weak probe’s transmission spectrum, which can change when the terahertz signal frequency is turned on and off. Advantages of under consideration model are its a 2D material whereas other materials are semiconductor or gaseous state. Also, Landau level of graphene has domains tuneable in tera hertz and infra-red region while we cannot tune the semiconductor and atomic media once the transition is chosen. Therefore, the proposed magnetized graphene system offers a tremendous opportunity for incorporating quantum interference into the development of optical solid-state devices.
Classification and quantification of entanglement through wedge product and geometry
Authors: Mahanti Soumik , Dutta Sagnik , Panigrahi Prasanta K 
Published: June 2023

Abstract
The wedge product of post-measurement vectors of a two-qubit state gives rise to a parallelogram, whose ‘area’ has been shown to be equivalent to the generalized I-concurrence measure of entanglement. In multi-qudit systems, the wedge product of post-measurement vectors naturally leads to a higher dimensional parallelepiped which yields a modified faithful entanglement measure. Our new measure fine grains the entanglement monotone, wherein different entangled classes manifest with different geometries. We present a complete analysis of the bipartite qutrit case considering all possible geometric structures where three entanglement classes of pure bipartite qutrit states can be identified with different geometries of post-measurement vectors: three planar vectors; three mutually orthogonal vectors; and three vectors that are neither planar and not all of them are mutually orthogonal. It is further demonstrated that the geometric condition of area and volume maximization naturally leads to the maximization of entanglement. The wedge product approach uncovers an inherent geometry of entanglement and is found to be very useful for the characterization and quantification of entanglement in higher dimensional systems.
An innovative approach to the improved radiating divertor concept by supersonic molecular beam injection on HL-2A
Authors: Xiao G.L. , Du H.L. , Fan D.M. , Zhong W.L. , Xue L. , Chen C.Y. , Yin J. , Zhu Y.R. , Feng B.B. , Gao J.M. , Huang Z.H. , Jiang M. , Li J.X. , Liang A.S. , Tong R.H. , Wu N. , Wu T. , Yang Z.C. , Yu X. , Zhong Y.Y. 
Published: June 2023

Abstract
The ‘puff-and-pump’ radiating divertor condition is a promising approach for the reduction of excessive thermal power loading on the divertor targets. The divertor supersonic molecular beam injection (SMBI) system installed on HL-2A strongly enhances the capacity of the divertor heat load control. This system has a faster time response than the divertor gas puffing (GP) system. Divertor heat load control capacity has been compared between these two techniques by experiments on HL-2A and simulations. Experimental results suggest that the divertor SMBI system reduces the divertor heat flux peak to a lower level with less time delay than that for the divertor GP system, owing to a higher injection rate and particle velocity. Simulations by SOLPS demonstrate that a high injection rate shortens the function time which is defined by the time interval between the arrival of the particles at the divertor plasma edge and the reduction of divertor electron temperature. High velocity of SMBI injected neutral gas particle also shortens the particle flight time to arrive at the edge. Less flight time and function time lead to a faster response of the divertor SMBI system compared to the divertor GP system. In addition, simulations by EMC3-EIRENE also suggest that, compared to the GP system, stronger heat load reduction of the SMBI system can also be caused by deeper deposition of gas source owing to its higher particle velocity.
Propeller Performance Analysis on The Modification of Trailing Edge Shape as Anti-Singing
Authors: Fikry Izzul , Made Ariana I , Kusuma Cahya 
Published: June 2023

Abstract
Singing is one of the problems that occurs in the propeller. However, singing will not happen to every propeller. Singing occurs a lot in high-speed propellers and on propellers with wide and thin blade sizes. One of the ships that have high speed and wide propeller is fast patrol boat. To overcome this problem, modifying the trailing edge is one of the most commonly used methods. Sharpening the trailing edge is a way to reduce vortex shedding. However, modifying the trailing edge of the propeller will change the shape of the propeller, which can affect the performance of the propeller. Therefore, this study discussed about the effect of trailing edge modification as anti-singing on propeller performance. Propeller performance analysed with open water test simulation assisted by computational fluid dynamic based software. There are three sharpening model in this study, where the sharpening size in this study refers to Van Lammeren anti-singing design. The size of sharpening are 20 mm, 25 mm, and 30 mm, where 20 mm sharpening is the best modification to overcome singing according to flow analysis. The open water test simulation result shows that the modification of trailing edge as anti-singing can increase the average thrust coefficient 8.96%, average torque coefficient 7.88%, and average open water efficiency 1.29%.
Numerical analysis of the effect of a foil-shaped centerbulb on vertical motion and wake on a catamaran sightseeing boat
Authors: Kiryanto  , Manik Parlindungan , Hakim Muhammad Luqman , Firdhaus Ahmad 
Published: June 2023

Abstract
Internal and external factors will influence the ship’s ability to maneuver. Therefore, proper planning and calculations are needed to produce good ship comfort and performance in designing a vessel. One of them is paying attention to the quality of the movement, which is the ship’s response to the influence of the sea, such as waves and wakes which are the comparison between the planned speed and the fluid flow velocity on the propeller under water. In an effort to improve the quality of good motion, this study tries to add variations in geometry and position on the foil-shaped center bulb to see the effect of vertical motion and wake. This study solves the existing problems by analyzing them using CFD software. Based on the results of the numerical simulation. In three different ship speed conditions, it has the best response when the wave heading is 0° on the ship with the addition of a center bulb in the midship area. It can reduce the vertical motion value up to 9.35% against the vessel without a center bulb and by 8.73% at 180° wave heading. So that the shape and placement of the foil-shaped center bulb on the catamaran can improve the quality of the ship’s maneuverability.
Design optimization of connector on ship interceptor
Authors: Mursid O , Samuel  , Yulianti S , Huda N 
Published: June 2023

Abstract
Currently, research on an energy-saving device only focuses on the effective operation of this device. Structural assessment is needed to evaluate the reliability of the interceptor in operation conditions. In this study, 25 mm thick interceptors are evaluated using the finite element method to find an optimized position of the bolt connector. The simulation shows that a smaller size of bolt connector leads to a higher maximum stress of interceptor. Based on the position of the bolt connector, it has a similar pattern in every bolt size. Overall, the best choice to install this device on the boat is between 140 mm and 240 mm of bolt distance. This distance is advised for installing an interceptor in the existing boat structure to avoid weakening the boat structure.
Powering Design of Portable Dynamic Positioning Thruster for 150 FT Cable Laying Barge: A Case Study of Untung Jawa-Tanjung Pasir Submarine Power Cable Laying
Authors: Made Ariana I , Wiryadinata Georgius Steven 
Published: June 2023

Abstract
Indonesia, an archipelagic nation with most of its electrical power produced by steam power plant. The distribution of electrical power is done through the main island to the smaller island, by means of according to Ministry of Energy and Mineral Resource is done through a submarine cable. In the study case area, Untung Jawa-Tanjung Pasir sea, the most appropriate cable laying platform is a barge. A barge is not equipped with the propulsion system and considering the cable laying operation requirement, barge given condition, environmental disturbances, the barge must be equipped with portable dynamic positioning thruster. An azimuth thruster is the proposed way to overcome this problem. The research done shall determine the barge’s necessary engine and propeller to fulfil its need. Using ship manoeuvring equation, the required thrust of the barge for surge, sway, and yaw are 274.36 kN, 289.21 kN, 3292.67 kNm respectively. To produce the required forces and moment, the researcher utilizes Cummins KTA38 (634 kW) diesel engine, Masson Marine gearbox (5.542:1), and Ka4-70 Nozzle 24 with the diameter of 1.6 m and P/D value of 1.06. In the free running condition, the barge will run with the speed of 3.52 m/s or 6.85 knots.
Experimental Study of the Influence Wave Period on the Performance Darrieus Turbine with Modification of the Blade Angle
Authors: Suyanto Eko Marta , Fitri Sutopo Purwono , Erwandi  , Rahuna Daif , Kasharjanto Afian 
Published: June 2023

Abstract
Indonesia has a long coastline that has the potential for renewable energy sources from waves to be used as an energy source for power generation. To take advantage of this potential, research has been carried out by testing the Darrieus-type vertical axis turbine model at the Indonesian Hydrodynamics Laboratory. The weakness of the wave turbine is that it cannot rotate due to the wave force due to the position of the turbine rotor which is perpendicular to the turbine axis. By changing the angle of the turbine blade in an inclined position, it is expected to produce optimal efficiency to produce rotor rotation. This paper describes the testing of a turbine model with an angled turbine blade that produces the best efficiency and rotation due to wave forces and ocean currents. The test is carried out by varying the angle of the turbine blade tilt (45°, 60°, and 75°). Each is given a variation in height and wave period but still, maintains the turbine rotor area. Furthermore, the torque, efficiency, rotation, and resulting power are measured. wave height of 0.15 meters with variations in wave periods ranging from 1.2 - 2.5 seconds. The test results show that a turbine with a rotor angle of 60° produces the best performance.
Geology and Seabed Topography Research to Support the Implementation of Indonesia’s Submarine Cable Corridor Buton Island to EEZ (Hub Indonesia - USA)
Authors: Muljawan Djunaedi , Hakim Buddin Al , Setyaningrum Nugraheni , Pandoe Wahyu Widodo , Rusdiansyah Alfi , Widodo Joko , Trinugroho  
Published: June 2023

Abstract
The Indonesian Government has established pipelines and cable corridors through the Decree of the Minister of Marine Affairs and Fisheries Number 14 of 2021 concerning Submarine Pipelines and Cables. Indonesia’s strategic position in the world has become a favorite route for laying submarine cables, connecting Australia and Indonesia with America and other countries. The purpose of this study is to conduct a technical study of the existing ratified route corridor on the geological conditions of the Indonesian waters. The method used is path analysis of geological and geomorphology conditions by compiling class criteria related to and increasing risks to geological conditions. The results of the geological analysis show that several submarine cable lines pass through volcanic areas and faults; also, there are areas with a seabed side slope of >20%. This condition can affect the cable laying process, operations, and vulnerability. In addition, it is necessary to rearrange the paths that have a high hazard vulnerability to disasters and other activities. The results of this study are in the form of recommendations for proposed corridor revisions that reduce constraints related to geology and geomorphology.
Improving Safety of Marine Cable Survey Operation Through Safety Assessment using the Formal Safety Assessment Method (Case Study RV. Baruna Jaya)
Authors: Muhtadi A , Waskito D H , Prasetyo D F 
Published: June 2023

Abstract
In the last five years, survey operations for marine cables have become a yearly activity carried out by Indonesia’s Research Vessel. Safety in survey operations is one of the biggest concerns in marine cable route surveys. This paper focuses on handling the survey operation risk and excluding the vessel operation risk. To solve the problem, we need a risk analysis methodology with systematic steps to identify, prioritize, and control risks. The International Maritime Organization’s (IMO) methodology to deal with them is the Formal Safety Assessment (FSA). Firstly, Hazard Identification (HAZID) is used to identify hazards and prioritize Top Events where Towfish Survey Equipment Lost is found as the Highest Top Event with basic events Bad Communication, Fisheries Aggregating Device, Seabed Collision, and Wire & Cable fastening using the Fault Tree Analysis Method as the second step. Determining a Risk Control Option (RCO) based on the Basic Event in the FTA is the third step, of which Mitigation and Prevention will be the highlight. Lastly, RCO will be assessed according to Cost Benefit Assessment (CBA). The results showed that by using Administrative Risk Control Option, we could reduce the probability of survey equipment being lost by 46.55%.
Risk Accident Analysis Due to the Effect of Wrong Loading on Ship Stability
Authors: Dewi S S , Zaky M , Wahidin A , Asmara I P S 
Published: June 2023

Abstract
In this study, the effect of laying and shifting load is considered as one of the main factors of ship safety. Ferry Ro-Ro that carry vehicles and passengers were chosen as the object of study with the assumption that the vehicles are not lashed. Safety measurement is carried out through static stability analysis with criteria limits IMO Intact Stability Code 2008 and PM44 2021 and dynamic stability with roll motion limitations due to beam sea to result quantitative risk assessment data. The wave height is taken from the waters of the Bali strait with a Beaufort scale conversion of BF1 to BF6. Because of the vehicle is not lashed, the vehicle is simulated to shift horizontally as far as 10% to stack onto the starboard, while the assumption of passenger movement is vertical and horizontal. The biggest heel angle due to the shifting load is 9 degrees when all loads are stacked on the starboard (G1). Analysis of the calculation of static stability shows that several conditions do not meet the criteria with the greatest Roll Amplitude value of 39.56 deg at BF6 4 m. In dynamic stability conditions through maxsurf motion, the safe wave height for Ferry Ro-Ro operation is up to BF4 1.14 m. The highest risk of ship capsizing occurs when operating on BF5 with wave heights above 2 m.
Observation of partial and infinite-temperature thermalization induced by repeated measurements on a quantum hardware
Authors: Santini Alessandro , Solfanelli Andrea , Gherardini Stefano , Giachetti Guido 
Published: June 2023

Abstract
On a quantum superconducting processor we observe partial and infinite-temperature thermalization induced by a sequence of repeated quantum projective measurements, interspersed by a unitary (Hamiltonian) evolution. Specifically, on a qubit and two-qubit systems, we test the state convergence of a monitored quantum system in the limit of a large number of quantum measurements, depending on the non-commutativity of the Hamiltonian and the measurement observable. When the Hamiltonian and observable do not commute, the convergence is uniform towards the infinite-temperature state. Conversely, whenever the two operators have one or more eigenvectors in common in their spectral decomposition, the state of the monitored system converges differently in the subspaces spanned by the measurement observable eigenstates. As a result, we show that the convergence does not tend to a completely mixed (infinite-temperature) state, but to a block-diagonal state in the observable basis, with a finite effective temperature in each measurement subspace. Finally, we quantify the effects of the quantum hardware noise on the data by modelling them by means of depolarizing quantum channels.
Tribo-mechanical behaviour of electroless Ni-B-Mo coatings with varying bath composition
Authors: Barman Manik , Barman Tapan Kumar , Sahoo Prasanta 
Published: June 2023

AbstractNi-B-Mo alloy coating layers are developed on steel substrates with various coating bath compositions to investigate the significance of bath parameters on coating characteristics. The as-deposited coatings are characterized based on surface roughness, coating thickness, surface morphology, and phase structure through Surface Roughness Tester, Scanning Electron Microscopy (SEM), and x-ray Diffraction (XRD), respectively. Tribological behaviour of the coated layers is investigated through a pin-on-disc multi-tribo tester under dry condition. Surface hardness and elastic modulus are measured through nano-indentation tests. The scratch-hardness of the coatings is measured using a micro-scratch tester. Coating characteristics are determined and the significance of each coating bath parameter is analysed. It is found that the coating thickness increases with bath parameter concentration level due to increase in borohydride concentration. The increase in molybdenum concentration increases the surface roughness (Ra) from 0.28μm to 1.05μm and forms coarse grained surface morphology with some visible cracks leading to increase in COF value from 0.24 to 0.77. Nano-hardness and scratch hardness are found to decrease with the addition of molybdenum into the Ni-B matrix though nano-hardness (Hv) value increases from its minimum value of 530 to 971 due to the increase in boron concentration. The elastic modulus value is found to vary from 83 GPa to 197 GPa but no such specific trend may be observed with the variation of bath composition.
Plant environmental memory: implications, mechanisms and opportunities for plant scientists and beyond
Authors: Auge Gabriela , Hankofer Valentin , Groth Martin , Antoniou-Kourounioti Rea , Ratikainen Irja , Lampei Christian 
Published: June 2023

Abstract
Plants are extremely plastic organisms. They continuously receive and integrate environmental information and adjust their growth and development to favour fitness and survival. When this integration of information affects subsequent life stages or the development of subsequent generations, it can be considered an environmental memory. Thus, plant memory is a relevant mechanism by which plants respond adaptively to different environments. If the cost of maintaining the response is offset by its benefits, it may influence evolutionary trajectories. As such, plant memory has a sophisticated underlying molecular mechanism with multiple components and layers. Nonetheless, when mathematical modelling is combined with knowledge of ecological, physiological, and developmental effects as well as molecular mechanisms as a tool for understanding plant memory, the combined potential becomes unfathomable for the management of plant communities in natural and agricultural ecosystems. In this review, we summarize recent advances in the understanding of plant memory, discuss the ecological requirements for its evolution, outline the multilayered molecular network and mechanisms required for accurate and fail-proof plant responses to variable environments, point out the direct involvement of the plant metabolism and discuss the tremendous potential of various types of models to further our understanding of the plant’s environmental memory. Throughout, we emphasize the use of plant memory as a tool to unlock the secrets of the natural world.
Aristotle on Movement, Incompleteness and the Now
Authors: Coope Ursula 
Published: June 2023

Abstract
According to Aristotle, the present is an indivisible instant, or now. Aristotle holds that present-tense movement claims are sometimes true, but he argues that nothing ‘kineitai’ (moves/is moving) in the now. He characterizes movement as something that is ‘incomplete’ while it is occurring. My paper is an attempt to understand this combination of views. I draw a contrast between Aristotle’s position and an alternative view (defended by certain modern philosophers, but also by Plotinus), on which a present-tense movement claim is made true by the existence of something that is wholly present in the now. And I give some reasons for preferring Aristotle’s position.
The Lives of Others
Authors: Farkas Katalin 
Published: June 2023

Abstract
On a Cartesian conception of the mind, I could be a solitary being and still have the same mental states as I currently have. This paper asks how the lives of other people fit into this conception. I investigate the second-person perspective—thinking of others as ‘you’ while engaging in reciprocal communicative interactions with them—and argue that it is neither epistemically nor metaphysically distinctive. I also argue that the Cartesian picture explains why other people are special: because they matter not just for the effect that they have on us.