bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mass-limited plasmas heated by laser-driven fast electrons as a powerful source of neutron and hard x-ray radiation
Authors: Gus’kov S Yu , Kuchugov P A , Murakami M , Yakhin R A 
Published: September 2020

Abstract
To create a plasma with extreme thermodynamic parameters, we propose to heat with a laser-accelerated fast electron beam a target of a size less than the mean free path of the heating particles. The effect of capture of fast electrons generated in an electrically neutral target due to the action of a self-consistent electrostatic field at its boundaries allows us to volumetrically heat a target over multiple flights of fast electrons through it. Using such a heating mode enables control of the target mass to be significantly less than the mass stopping range of the heating particles. Heating a mass-limited target by laser-driven relativistic electrons can produce a plasma with a temperature of ∼10’s keV and a density close to its initial solid-state density. Such plasma objects are expected to serve as powerful sources of neutron and hard x-ray radiation.
Development of robust metric based on cumulative electrical power for electromechanical impedance based structural health monitoring
Authors: Soman Rohan , Singh Shishir Kumar , Wandowski Tomasz , Malinowski Pawel 
Published: September 2020

Abstract
Electromechanical impedance (EMI) based techniques have been proposed for structural health monitoring due to their sensitivity to low levels of damage. Most of the work in the EMI technique depends on the change in the admittance signature of the structure in the healthy and damaged state. Several metrics have been proposed to quantify this difference in the signature. Most common being root-mean square difference (RMSD), mean absolute percentage deviation, correlation coefficient etc. As the admittance signatures has several troughs and peaks, the statistical metrics are not robust and often show false detection due to ambient changes and measurement noise.
Thus, this paper proposes a novel index for the damage detection using the EMI technique based on the cumulative electrical power. The frequency v/s resistance or conductance plot is used for calculating the normalized cumulative electrical power (NCP) of the system. The NCP curve is a monotonically increasing function and hence robust for statistical comparison. The cumulative power curve is then used to develop three different indices comparing the amplitude difference (RMSD of the NCP curves), difference in the area under the NCP curve as well as the modified Frechet distance between the NCP curves. The performance of these indices are compared with the RMSD index which has been commonly used. The comparison is carried out on four different structures and show very encouraging results. In addition to the experimental validation, sensitivity studies have been carried out on an analytical signal. It is seen that the Frechet distance based index is a robust indicator for damage detection and minimizes the false detection under variety of conditions affecting the EMI signature.
Topologically nontrivial interband plasmons in type-II Weyl semimetal MoTe2
Authors: Jia Xun , Wang Maoyuan , Yan Dayu , Xue Siwei , Zhang Shuyuan , Zhou Jianhui , Shi Youguo , Zhu Xuetao , Yao Yugui , Guo Jiandong 
Published: September 2020

Abstract
In many realistic topological materials, more than one kind of fermions contribute to the electronic bands crossing the Fermi level, leading to various novel phenomena. Here, using momentum-resolved inelastic electron scattering, we investigate the plasmons and their evolution across the phase transition in a type-II Weyl semimetal MoTe2, in which both Weyl fermions and trivial electrons contribute to the Fermi surface in the T
d phase. One plasmon mode in the 1T′ phase at high temperature and two plasmon modes in the topological T
d phase at low temperature are observed. Combining with first-principles calculations, we show that all the plasmon modes are dominated by the interband correlations between the inverted bands of MoTe2. Especially in the T
d phase, since the electronic bands split due to inversion symmetry breaking and spin–orbit coupling, the plasmon modes manifest the interband correlation between the topological Weyl fermions and the trivial electrons. Our work emphasizes the significance of the interplay between different kinds of carriers in plasmons of topological materials.
Investigation of TESPEL cloud dynamics in Wendelstein 7-X stellarator
Authors: Kocsis G. , Tamura N. , Bussiahn R. , McCarthy K.J. , Baldzuhn J. , Biedermann C. , Cseh G. , Damm H. , Kornejew P. , König R. , Panadero N. , Szepesi T. 
Published: September 2020

Abstract
Tracer-encapsulated solid pellet (TESPEL) was injected from the outboard midplane into Wendelstein 7-X (W7-X) plasmas. Viewing from behind the flight path, the distribution of the light emissions from the TESPEL cloud particles (H, C and C2+) was recorded using an ultrafast visible camera with a temporal resolution up to 2 µs, which allows resolving both the pellet cloud evolution and the detachment of the drifting cloud. It was observed that both the B┴ and the B║ aligned dimensions of the pellet cloud fluctuate quasi-periodically, this being associated with a vertical cloud movement and an eruption/ejection of part of the cloud. It is found that, first, the pellet cloud expands parallel to the magnetic field lines for about 10 µs. Then, when the cloud reaches a certain B║ size the ionized part of the cloud (plasmoid) moves vertically (typically upwards) and detaches itself from the pellet within 10 µs. One possible explanation for the upward movement of the pellet cloud is the presence of a vertical component of grad(B) pointing downward resulting in an upward cloud drift.
Cephalopod-inspired robot capable of cyclic jet propulsion through shape change
Authors: Christianson Caleb , Cui Yi , Ishida Michael , Bi Xiaobo , Zhu Qiang , Pawlak Geno , Tolley Michael T 
Published: September 2020

Abstract
The compliance and conformability of soft robots provide inherent advantages when working around delicate objects or in unstructured environments. However, rapid locomotion in soft robotics is challenging due to the slow propagation of motion in compliant structures, particularly underwater. Cephalopods overcome this challenge using jet propulsion and the added mass effect to achieve rapid, efficient propulsion underwater without a skeleton. Taking inspiration from cephalopods, here we present an underwater robot with a compliant body that can achieve repeatable jet propulsion by changing its internal volume and cross-sectional area to take advantage of jet propulsion as well as the added mass effect. The robot achieves a maximum average thrust of 0.19 N and maximum average and peak swimming speeds of 18.4 cm s−1 (0.54 body lengths/s) and 32.1 cm s−1 (0.94 BL/s), respectively. We also demonstrate the use of an onboard camera as a sensor for ocean discovery and environmental monitoring applications.
Identification of fire protection system availability in faculty of engineering, University of Teuku Umar
Authors: Salena I Y , Safriani M , Amin M A R 
Published: September 2020

Abstract
The objective of this study is to identify the availability and implementation of fire protection systems in the Engineering Faculty of Teuku Umar University. The fire protection components identified were the access and water supply component, the mean of egress, passive and active fire protection systems, by conducting direct observations to the field using a checklist form. The building identification refers to the Minister of Public Works Regulation No. 26/PRT/M/2008, and the collected data was analyzed using the Likert scale method, which shows the level of conformity to the regulations based on the generated data. The result shows that the access and water supply components obtain 2.75 of the Likert scale. The mean of egress obtains an average value of 2.24 of the Likert scale. The values mean these facilities do not fulfill the regulation. The passive protection system obtains 2.48 of the Likert scale; it means the facilities do not fulfill the regulation. Active protection systems get an average value of 1.4 of the Likert scale; it means the facilities do not fulfill the regulation. The results of the study show that the fire protection system in the Faculty Of Engineering Building did not meet regulation No. 26/PRT/M/2008 overall so that further improvement is needed to fulfill the requirement of fire protection systems to overcame the danger of fire.
The influence of occupational safety and health program on the manpower performance of construction company in Banda Aceh city
Authors: Jamil M , Maulina F , Fachurrazi  , Hasan M , Muslimsyah  
Published: September 2020

Abstract
The implementation of occupational safety and health program in Banda Aceh city is still not optimal, as indicated by a high rate of work accidents. The purpose of this research is to study the effect of the occupational safety and health program on the manpower performance of construction companies in Banda Aceh city. Three construction companies were studied and compared to each other. Data collection was carried out by observation, using questionnaires, and interviewing the respondents of the research, in this case, the foreman, chief workman, workman, and worker. Data processing is conducted by using descriptive statistical analysis, validity test, reliability test, and regression analysis. The results of the analysis show that the application of occupational safety and health program has a significant influence on manpower performance.
Level of importance and housing satisfaction of Jeulingke residence housing on-road aspect
Authors: Iqbal M 
Published: September 2020

Abstract
Jeulingke Residence is one of the subsidized housing located in Jeulingke Village, Syiah Kuala District, Banda Aceh City. Occupants after occupying, faced with problems regarding the performance of developers on aspects of roads. The road aspect has a bad condition because the road surface + 246 m towards the housing complex is currently not pavement. This study aims to identify the level of importance and satisfaction of residents of Jeulingke Residence Housing on-road aspects. This study uses qualitative methods through observation and interviews and quantitative methods through questionnaires. The total population of houses that have been occupied in Jeulingke Residence is 102 units, and no sampling is taken. Data analysis used Importance Performance Analysis (IPA) through Minitab software 16. The results of the study showed that the level of importance and satisfaction that requires priority in improving performance in the aspect of the road is the condition of the entrance pavement.
Characteristic of calcined diatomaceous earth from Aceh Besar District - Indonesia as cementitious binder
Authors: Hasan M , Saidi T , Muyasir A , Alkhaly Y R , Muslimsyah M 
Published: September 2020

Abstract
Diatomaceous earth is a naturally occurring, soft, siliceous sedimentary rock, which is easily crumbled into a fine powder. In this paper, the characteristic of calcined diatomaceous earth from Aceh Besar District – Indonesia as a cementitious binder is studied. The chunk of diatomaceous earth was burned in the brick burning furnace for 4 days, then ground so that it becomes a powder. The powder was sieved to form the binder having the particle sizes less than 250 μm. The binder then calcined at the temperature of 600°C for 5 hours in a laboratory furnace. The density, specific gravity, absorption, particle size analyzer, X-ray diffraction, X-ray fluorescence, and scanning electron microscopy tests were therefore performed. The test results show that the density, saturated surface dry specific gravity, and absorption of calcined diatomaceous earth binder are 767 kg/m3, 2.000, and 6.535 %, respectively. The particle sizes range from 0,107 μm to 231 μm. The main minerals of the particle are graphite, quartz, and lead-silver thallium antimony sulphide. The main chemical compositions of calcined diatomaceous earth are SiO2, 56.00 %; Fe2O3, 26.40 %; ZrO2, 7.20 %; and Al2O3, 6.50 %.
Risk analysis study on building projects in Pidie District
Authors: Fahmi F , Aulia T B , Isya M 
Published: September 2020

Abstract
This study aims to determine the dominant risk factors occurring during the implementation of building construction and to know how to control and handle the risk factors that occur. The methodology used is a quantitative method with a questionnaire as a research instrument. The number of samples used was 55 respondents from a population of 121 companies. Based on the analysis of frequency index (FI), there are dominant risk factors that occur in the implementation of building construction in Pidie District. The dominant risk factors are skills and expertise, weather, access to the project location, unequipped workers with protective equipment, wrong implementation method, the expensive material, incomplete design data, low quality of material, damage to the tool, and a lack of workers. Furthermore, the ways to control and handle risks that occur during the construction project are increasing the trust of the owner, having knowledgable company management and competent workforce, reducing security disturbances, increasing collaboration with local village officials, minimizing equipment damage, managing material purchases before the prices rise, and mastering the implementation method.
The effect of public space availability on children’s creativity (case study: Taman Sari kota Banda Aceh)
Authors: Fitri I , Aulia T B , Fuady M 
Published: September 2020

Abstract
The purpose of this study was to determine the effect of Taman Sari as a public space on children’s creativity, what factors were the most influential of public space facilities on children’s creativity, and how much the Taman Sari facility was structured for children. The research location was Taman Sari, a City Park, in Baiturrahman Sub-District, City of Banda Aceh. Primary data collection was done by dividing the questionnaire. This research was conducted by multiple linear regression analysis. The results showed that the existence of Taman Sari with its variables (accessibility, facilities, environment, and comfort), together, had a significant effect on children’s creativity. The factors that have the highest impact on children’s creativity were facilities and comfort. Taman Sari at present, 2019, has undergone improvements and handlings. There are many improvements in both quantity and quality facilities. The government has been performing marked improvement to make Taman Sari as a public space.
Performance of reinforced concrete columns strengthened with carbon fiber reinforced polymer (CFRP) - case study of an abandoned school project
Authors: Amin N M , Ahmad N A 
Published: September 2020

Abstract
This research presented a case study of an abandoned three-storey school building focusing on strengthening of Reinforced Concrete (RC) column with Carbon Fiber Reinforced Polymer (CFRP) jacketing. The constructed structural element of the building was assessed and evaluated by visual observation, destructive tests and non-destructive tests include carbonation tests, ferro scan tests, steel reinforcement verification, Ultrasonic Pulse Velocity (UPV), coring tests and rebound hammer tests. The modeling of the whole building was carried out using Orion 18, a structural analysis program based on the site test results in order to assess the structural integrity of the building. Based on the structural analysis conducted in Orion 18, a column at ground floor level was chosen to be strengthened with multilayer CFRP jacketing. This column has cross-section of 300mm x 300mm with 3600mm in height. Results were obtained through non-linear Finite Element simulation. The behavior of the column with and without CFRP jacketing was studied to observe its axial stress and strain behavior in ABAQUS Finite Element software. The result shows that increasing in number of CFRP layers has a significant effect on the behavior of such columns which was expected due to confinement effect.
Topographic change and sediment transport on Maeshima Tombolo tidal flat
Authors: Kato S , Kuritani I , Tabata T , Nakamura R , Okabe T 
Published: September 2020

Abstract
For the management of the tidal flat environment and the preservation of several important functions of the tidal flat, the accurate topographic monitoring is indispensable. However, the appropriate measurement of the tidal flat topography is very difficult because water level changes every moment due to tidal oscillation, and the accountable time for the measurement is limited within several hours under low tide condition. In this study, topographic measurement of tidal flat using Unmanned Aerial Vehicle (UAV) was conducted 5 times over a year, and Digital Elevation Model (DEM) obtained by UAV photogrammetry (UAV-DEM) of the tidal flat was constructed in each measurement. The area of 400m in the land-island (L-I) direction and 100m in the west-east (W-E) direction was set on the developed UAV-DEM to analyze the short-term topographical changes (2 weeks including typhoon events, half year and year). By the influence of typhoon passing, sand on the tidal flat was transported from east to west obviously within typhoon event. However, after the topographic change due to the typhoon event, the sand moved opposite direction. By the estimation of the sand volume on the tidal flat using UAV-DEM, it was found that the change of the volume was quite small in one year. These results indicate that the sand volume on this tidal flat is mostly preserved although active sand transport occurs on the tidal flat.
Numerical modeling of suspended sediment concentration (SSC) due to water surface fluctuations of the Krueng Langsa estuary, Aceh Province
Authors: Isma F , Ismida Y , Purwandito M , Fajri H 
Published: September 2020

Abstract
Krueng Langsa estuary is a meeting zone between the sea and the river that crosses the Langsa city. As a result, the Krueng Langsa estuary had a physical change due to tides and river discharge. The Indonesian Minister of Trade Regulation of Number 24 of 2019 has announced that the Krueng Langsa estuary will resume its activities as international shipping. This indeed becomes an important problem for the continuity of shipping activities. An initial study needs to be carried out related to changes in the physical waters of the estuary due to high and low tides. This study is focused on the estuary physical system—especially in water depth, tidal current, salinity, temperature, and SSC along the estuary due to tidal dynamics processes and river discharge runoff—which are modeled numerically. The influence of the Malacca Strait and the Langsa River flow on SSC at each measurement point have also been observed. In this study, the model results were evaluated using the in-situ measurements. The results show that numerical modeling is capable of providing useful information about the physical condition of the Krueng Langsa estuary and agree well with the measurement data.
Study of potential implementations for motorcycle lanes in Padang city
Authors: Kurniati T , Afyendo E , Putri E E 
Published: September 2020

Abstract
Currently, two-wheeled vehicles or motorcycle dominate more than 80% of motorized vehicles in Indonesia. In addition to low prices, these motorized vehicles are fuel efficient, have easier and faster mobilization. However, the large number of motorcycles results in complicated traffic operations and reduced levels of safety. Lanes separation is the best engineering solution to overcome this problem. The purpose of this study was to review the potential application of motorcycle lanes in the city of Padang, a case study on the Raya Ampang and By Pass roads. Collecting the primary data were conducted by Video Image Processor. Each road was carried out recording for 1 day during peak hours in the morning, afternoon, and evening. Analysis of road performance is based on the Highway Capacity Manual of Indonesia (MKJI) 1997 with the degree of saturation (DS) parameter. Road performance analysis is reviewed by comparing the existing conditions and the conditions in which the inclusive motorcycle lanes are applied. The results of the study show that both the Raya Ampang and By Pass streets is feasible to provide an inclusive lane or shared lanes for motorcycles—with a lane width of 3 meters. With motorcycle lane application scenarios, on the Raya Ampang street for non-motorcycles lanes, there is a 10.7% increase in road performance, while for By Pass road, the increase in road performance is 31.5%.
Numerical simulation of groyne placement in minimising Krueng Aceh river bank erosion
Authors: Fatimah E , Fauzi A , Rezeki S , Suryati S 
Published: September 2020

Abstract
This paper presents the prediction of the flow velocity in a 575 meters-long reach of the Krueng Aceh river. It focused on the part of the riverbank where erosion occurred due to the pillars and bridge abutments. One alternative to reduce erosion is using groynes for regulation. The simulations were conducted using the Surface Water Modelling System program (SMS 11.2). The effects of the groynes on the flow changes causing erosion were determined by mathematical simulation of two-dimensional flow using RMA2. The calibration of RMA2 was undertaken by determining the Root-Mean-Square (RMS) error between the measured and mathematical model velocities. Nine scenarios of simulations have been done to investigate the effect of the groyne installation in reducing erosion in the river bend, in term of its length (L), and angle (α), according to river condition. From the simulation results, it can be concluded that the distribution of flow velocities towards the outer river bend for the perpendicular groyne of 9.0m long was smaller compared to the 7.0m one. The groyne with the angle of 10° and length of 7.0m was better in reducing the velocities at the outer riverbank than the 9.0m one. Whereas the groyne with 30° orientation and 9.0m long is better in reducing the eddy than that of the 7.0 m.
The feasibility construction of Alas-Pedesi bridge in Kuta Cane Southeast Aceh district based on the analysis of the transportation economic value
Authors: Harja J , Isya M , Sugiarto S 
Published: September 2020

Abstract
Kutacane is a city located in Southeast Aceh district, the majority of the community’s economic income comes from agricultural and plantation products, the production of corn and cocoa is distributed to the city center from several sub-districts located across the Alas river which is a river that separates some of these districts from the city center. Therefore, the Lawe Alas-Pedesi bridge was built, to facilitate the distribution of production results by reducing distance and travel time. The purpose of this study was to determine the effect of the Alas-Pedesi Lawe bridge, on the operational costs of vehicles, agricultural production, plantations based on producer surpluses, and calculate the economic viability of development including Benefit Cost Ratio (BCR), Net Present Value (NPV), Economic Internal Rate of Return (EIRR). The results of this study get a total time difference of IDR 68,583, - / vehicle, a total difference in vehicle operating costs (BOK) of IDR.4,441, / vehicle, the profit of farmers (corn) for 10 years can be as much as IDR200.567.937.375, - / planting season, the total difference for the benefit of farmers (cocoa) for 10 years can be as much as IDR 3.919.484.400 / planting season. The economic feasibility of the construction of the Lawe Alas-Pedesi bridge obtained in 2030 has met the eligibility standards for all discount rates. In the BCR obtained a 10% discount rate is 1.74, a 12% discount rate is 1.46 and at a 15% discount rate is 1.12, and at the Net Present Value 10% discount rate is obtained NPV IDR 23,422,534,229, - discount 12% rate is obtained NPV IDR. 13,491,749,019, and at a 15% discount rate is obtained NPV IDR. 3,243,265,869. While the value of EIRR obtained at a discount rate of 16, 33 %, this shows the bridge Lawe Alas-Pedesi feasible to build the bank lending rate at 16.33%.