bluuebunny/crossref_metadata_2025_split huggingface dataset:
Exploring the MeV sky with a combined coded mask and Compton telescope: the Galactic Explorer with a Coded aperture mask Compton telescope (GECCO)
Authors: Orlando Elena , Bottacini Eugenio , Moiseev A.A. , Bodaghee Arash , Collmar Werner , Ensslin Torsten , Moskalenko Igor V. , Negro Michela , Profumo Stefano , Digel Seth W. , Thompson David J. , Baring Matthew G. , Bolotnikov Aleksey , Cannady Nicholas , Carini Gabriella A. , Eberle Vincent , Grenier Isabelle A. , Harding Alice K. , Hartmann Dieter , Herrmann Sven , Kerr Matthew , Krivonos Roman , Laurent Philippe , Longo Francesco , Morselli Aldo , Philips Bernard , Sasaki Makoto , Shawhan Peter , Shy Daniel , Skinner Gerry , Smith Lucas D. , Stecker Floyd W. , Strong Andrew , Sturner Steven , Tomsick John A. , Wadiasingh Zorawar , Woolf Richard S. , Yates Eric , Ziock Klaus-Peter , Zoglauer Andreas 
Published: July 2022

Abstract
The sky at MeV energies is currently poorly explored. Here we present an innovative mission concept that builds upon the heritage of past and current missions improving the sensitivity and, very importantly, the angular resolution. This consists in combining a Compton telescope and a coded-mask telescope. We delineate the motivation for such a concept and we define the scientific goals for such a mission.

The Galactic Explorer with a Coded Aperture Mask Compton Telescope (GECCO) is a novel concept for a next-generation telescope covering hard X-ray and soft gamma-ray energies.
The potential and importance of this approach that bridges the observational gap in the MeV energy range are presented.
With the unprecedented angular resolution of the coded mask telescope combined with the sensitive Compton telescope, a mission such as GECCO can disentangle the discrete sources from the truly diffuse emission. Individual Galactic and extragalactic sources are detected. This also allows to understand the gamma-ray Galactic center excess and the Fermi Bubbles, and to trace the low-energy cosmic rays, and their propagation in the Galaxy. Nuclear and annihilation lines are spatially and spectrally resolved from the continuum emission and from sources, addressing the role of low-energy cosmic rays in star formation and galaxy evolution, the origin of the 511 keV positron line, fundamental physics, and the chemical enrichment in the Galaxy. Such an instrument also detects explosive transient gamma-ray sources, which, in turn, enables identifying and studying the astrophysical objects that produce gravitational waves and neutrinos in a multi-messenger context. By looking at a poorly explored energy band it also allows discoveries of new astrophysical phenomena.
A finite element model of the mechanical interactions between peripheral nerves and intrafascicular implants
Authors: Akouissi Outman , Lacour Stéphanie P , Micera Silvestro , DeSimone Antonio 
Published: July 2022

Abstract

Objective. Intrafascicular peripheral nerve implants are key components in the development of bidirectional neuroprostheses such as touch-enabled bionic limbs for amputees. However, the durability of such interfaces is hindered by the immune response following the implantation. Among the causes linked to such reaction, the mechanical mismatch between host nerve and implant is thought to play a decisive role, especially in chronic settings. Approach. Here we focus on modeling mechanical stresses induced on the peripheral nerve by the implant’s micromotion using finite element analysis. Through multiple parametric sweeps, we analyze the role of the implant’s material, geometry (aspect-ratio and shape), and surface coating, deriving a set of parameters for the design of better-integrated implants. Main results. Our results indicate that peripheral nerve implants should be designed and manufactured with smooth edges, using materials at most three orders of magnitude stiffer than the nerve, and with innovative geometries to redistribute micromotion-associated loads to less delicate parts of the nerve such as the epineurium. Significance. Overall, our model is a useful tool for the peripheral nerve implant designer that is mindful of the importance of implant mechanics for long term applications.
Application of K-Means Cluster Analysis for Magnetic Susceptibility Zoning of Urban Topsoil in Bandung City
Authors: Kirana Kartika Hajar , Iryanti Mimin , Nugraha Muhamad Gina , Agustine Eleonora , Fitriani Dini 
Published: July 2022

Abstract
Bandung is one of the metropolitan cities in Indonesia which has a dense population. As a result, the number of vehicles is increasing, which causes an abundance of particulates on the urban topsoil. Motor vehicle particulates can be identified through the value of magnetic susceptibility. The greater the magnetic susceptibility value on the topsoil, the more magnetic minerals are associated with the number of particulates produced by vehicles. To zone the value of magnetic susceptibility in an area, a clustering method is needed. In this study, magnetic susceptibility zoning analysis was conducted using the K-mean cluster method. The data processing results on 38 samples divided into three clusters showed that 12 samples were in cluster 1, 23 samples were in cluster 2, and 3 samples were in cluster 3. The samples in each cluster were influenced by the magnetic susceptibility value between the sample centre and the neighbouring samples. The validation of the clustering results is shown through the F test, which shows that the calculated F is greater than the F table at a significance level of 0.05. Thus, it can be said that there is an association between the magnetic susceptibility values in a cluster.
Effect of Pretreatment Spent Coffee Ground with Natural Deep Eutectic Solvent (NADES) on Coffee Oil Yield
Authors: Erdawati  , Dianhar Hanhan , Khairunnisa Hasna 
Published: July 2022

Abstract
This study aims to identify spent coffee ground pretreatment with NADES solvent effect on coffee oil yield. The types of NADES used are choline chloride: urea, choline chloride:fructose, and choline chloride:glucose. Spent coffee grounds were pretreated and extracted using Ultrasound-Assisted Extraction (UAE) method. Pretreatment at 1:10 (g/g) SCG:NADES ratio, 6 minutes on 55°C temperature. Then pretreated spent coffee grounds are extracted with n-hexane and separated solvent from coffee oil from pretreatment coffee oil are palmitic acid (46,75%), linoleic acid (48,07%), and stearic acid (1,66%)using a rotary evaporator. Pretreatment coffee oil yields are 17,6%, meanwhile the non-pretreatment yields only 13,53%. Fatty acid in coffee oil was identified using FTIR and GC-MS. The fatty acid compounds
The Effect of Calcium Carbonate (CaCO3) and Polystyrene (PS) Composition on Contact Angle and Compressive Strength of Hydrophobic Cement Mortar
Authors: Septiana Delvi , Ratnawulan  , Syaputri Oktaviani , Salam Muhammad 
Published: July 2022

Abstract
In the building there are several elements such as pillars, floors and walls. The wall is the outermost part of the building that directly receives changes in weather such as rain. As a result, the walls of the building are easily fragile and make the walls damaged. To reduce damage, it is necessary to test cement that is resistant to water (hydrophobic) so that the walls of the building are not easily damaged by water and durable with the help of hydrophobic agent additives in the form of CaCO3 and polystyrene. The purpose of this study was to investigate the effect of variations in the composition of CaCO3/polystyrene on the contact angle of the hydrophobic layer and the compressive strength of portland cement. Precursors were made by varying the composition of CaCO3 1%, 2%, 3% and polystyrene/tetrahydrofuran 1:0,065; 2:0,065; 3;0,065 and the calcination temperature used was 60°C using an oven. The optimum contact angle measurement results were obtained at the composition variation of CaCO3 3% and Polystyrene 3:0.065, which was 114.986° and the highest compressive strength value was at variations in the composition of CaCO3 1% and Polystyrene 3:0,065, which was 238.10 kg/cm2.
Effect of composition CaCO3/polyurethane (PU) on contact angle of the surface and compressive strength of mortar
Authors: Nazein  , Wazellin Deya , Fachrozy Mhd , Jingga Shintia Purnama , Ratnawulan  
Published: July 2022

Abstract
Infrastructure development, especially in the field of construction material technology, one of them is mortar. The water content greatly determines the energy performance and durability of the mortar. Water can enter building materials or mortar through rain. Damage caused by moisture is common, especially in areas with high moisture content. To solve this problems, a hydrophobic or water-repellent mortar was created, one of which was by using a hydrophobic additive, namely CaCO3/PU. The purpose of this research was to determine the effect of the composition of CaCO3/PU on the surface contact angle and mortar strength. This research uses spray coating method. The hydrophobic layer was made with various compositions of 5%, 10% and 15% and the carbonation temperature used was 60°C using an oven. This research resulted in optimum contact angle at 15% PU variation of 120.8936° and optimum compressive strength of 187,68 kg/cm2 at 10% CaCO3 immersion.
The Effect of Sintering Temperature on Hydrophobic characteristic of Silica Manganese/Polystyrene (SiMn/PS) Nanocomposite
Authors: Ratnawulan  , Septiana D , Putri S R , Putri S G , Fauzi A 
Published: July 2022

Abstract
Currently a lot of research has been done on hydrophobic layers, but in its application the layer is easily damaged and is not corrosion resistant. Therefore, this research intends to decide the effect of variations in sintering temperature on the hydrophobic characteristic of SiMn/PS nanocomposite layers using a sintering temperature of 60°C, 100°C, 140°C, 180°C and 200°C for 1 hour using a furnace.. This research uses HEM-3D (High Energy Milling Ellipse-3D Mention), XRD (X-Ray Difraction) and SEM (Scanning Electron Microscope) tools. The precursor was made by giving 0.5 grams of polystyrene, 0.2 grams of silica powder and 0.2 grams of manganese powder. Coating is done by spin coating method. The results of this research from the variation of the sintering temperature showed that the SiMn/PS nanocomposite layer was hydrophobic based on the contact angle test. The highest contact angle is at a temperature of 60°C.
Magnetic Susceptibility Properties of Portland Cement
Authors: Ningsih Ella Destari , Rifai Hamdi , Dwiridal Letmi 
Published: July 2022

Abstract
The raw materials for making cement consist of raw materials and auxiliary materials where the raw materials consist of Limestone (CaO) (± 80 %), Silica (SiO2) (± 10 %), Clay (Al2O3) (± 8 %), and Iron Sand (Fe2O3) (± 2%) while the auxiliary materials consist of Gypsum (Ca(SO4).2H2O), Pozzolan and Limestone (High Grade). The purpose of this study was to analyze the mineral content contained in iron sand (Fe2O3) used in cement mixtures. To see the mineral content in this cement, can use the magnetic method, one of which is the susceptibility method which is also assisted by the extraction method on cement to purify the iron sand contained in the cement later. The tool used is a Magnetic susceptibility meter type MS2B and extracted using strong and weak magnets 10 times. The extraction results with weak and strong magnets were obtained from 0.011759 gr to 0.35648 gr from 100 gr cement. Sensitivity test was carried out on cement samples with values ranging from 41.27 x 10-8 m3/kg to 44.2 x 10-8 m3/kg.
The Effect of SiMn/PS Composition on Hydrophobic Properties of Nanocomposite Thin Layer
Authors: Ratnawulan  , Putri Sisi Gusti , Septiana Dian , Putri Suchi Ramadhani , Fauzi Ahmad 
Published: July 2022

Abstract
Many researches on the synthesis of hydrophobic coatings have been carried out, but in use, the coating is easily scratched, easily damaged by contact with other objects and easy to corrode, thereby reducing the quality of the coating. This can hinder the application of hydrophobic coatings in industry and others. Therefore, it is necessary to develop a hydrophobic coating that is strong and durable and anti-corrosion so that it can improve the quality of a surface. For this reason, research is carried out by mixing a substrate that has anti-corrosion properties such as silica and is hard such as manganese in order to overcome the problems that occurred previously using the spin coating method. The precursor was made by adding 0.5 grams of polystyrene composition, with varying SiMn composition. The coating was carried out using the spin coating method and the calcination temperature was 60°C using an oven for 1 hour. The results of this study from the composition variation showed that the SiMn/PS nanocomposite layer was hydrophobic based on the contact angle test. The largest contact angle at 50%:50% composition.
Magnetotelluric data analysis using 2D resistivity modelling in Gondang region, Bojonegoro
Authors: Priambodo Galih , Mariyanto Mariyanto , Lestari Wien 
Published: July 2022

Abstract
Previous studies in Gondang Subdistricthave identified underground mud reservoirnear a rock intrusion, while another study near Gondang Subdistrict has identified deep fault structures. This study will identify the distribution and characteristics of possible geological features in the area using magnetotelluric (MT) method to further describe the relationship between the geological features related to local geology. MT data measurements were conducted on 7 stations alonga north-south line, then modelled in 2D using nonlinear conjugate gradient algorithm. The model was used to describe the subsurface resistivity distribution and to identify the geological features. The results show 5 resistive zones (20–1250 Ω⋅m) and 4 conductive zones (≤10 Ω⋅m). The former consist of 4 vertical zones, 1 vertical zone deeper than 5 km, and 1 horizontal zone near the surface. 2 conductive zones surround a resistive zone, while 2 others stretch below the horizontal resistive zone. The vertical resistive zones are interpreted as andesite intrusions, and the horizontal one as volcanic breccia. The conductive zones are interpreted consisting of tuff and marl with possible saline water content. 3 vertical intrusions are thought to have the same source, and all vertical intrusions are suspected to co-occurr with the Pandan Volcano intrusion.
Landslides Investigation in Gado-Gado Hill South Padang District Using Geodetic GPS As a Reference for Landslide Disaster
Authors: Anaperta Yoszi Mingsi , Octova Adree , Maiyudi Riko , Hutahayan Cahaya Permai 
Published: July 2022

Abstract
South Padang District is a landslide-prone area. Almost 70% of South Padang District is hilly. This study uses GPS Geodetic with 10 measurement points along Siti Nurbaya Street to Bukit Gado-Gado Street. Based on observations, the moving average is 16.29251 mm. The largest movement occurred at point 7, namely 24.69818 mm in the azimuth direction. While the smallest movement at point 5 was 8 mm in the azimuth 90° direction. The horizontal movement was divided to the north and south. Point 7 experienced the largest change in vertical position, namely 25.5 cm and point 8 experienced the smallest change in vertical position, namely 2.8 cm. The majority of the movement is in the upward direction, only one point has a downward movement, namely at point 9 of 3.7 cm. Based on the data obtained, the highest landslide velocity occurred at point 7. This movement has a value of 0.148 m/year in the horizontal direction and 1.530 m/year in the vertical direction. The smallest horizontal velocity occurs at point 5 which is 0.048 m/year and the slowest movement direction occurs at point 8 and above at 0.168 m/year.
Analysis of Vibrating Sample Magnetometer (VSM) data of Brantas river sediments using HYSITS
Authors: Mariyanto Mariyanto , Ramadhan Djody Virgiawan , Purba Theresia Romauli , Nabilah Feninda Amalia 
Published: July 2022

AbstractSeveral vital activities in East Java are supported by the Brantas River, ranging from irrigation, supply of water raw materials, to industry. Along with the growing population, has the potential to increase the pollution that occurs in the Brantas River. VSM data was taken from the measurement results in Brantas River sediments. The aim of this study is to analyze the VSM measurement data in the Brantas River using the HYSITS script. The analysis was carried out to determine the type of magnetic domain contained in the Brantas river sediment. HYSITS program is used to provides a deeper and better analysis and interpretation. The results show that HYSITS produces 2 curves besides hysteresis loop graphic, that is 1st derivative of ΔM curve and ΔM curve. From the Hysteresis curve of sample, it is known that the Saturation Magnetization (Ms) value are 5.3262 - 5.998587 emu/g, the Saturation Remanent Magnetization (Mrs) value are 1.1537 - 1.545586 emu/g, the Magnetic Coercivity (Bc) value are 0.0188 - 0.020784 T, and Magnetic Remanent Coercivity (Bcr) are 0.059891 - 0.0815. Result of the analysis indicates that the magnetic minerals in Brantas River are strongly suspected to represent ferrimagnetic minerals with Pseudo-Single Domain (PSD).
HYSGUITS: A MATLAB Graphical User Interface (GUI) for hysteresis loop simulation in Vibrating-Sample Magnetometer (VSM) data
Authors: Antareza Muhammad Archie , Salim Christopher , Mariyanto Mariyanto , Rochman Juan Pandu Gya Nur , Lestari Wien 
Published: July 2022

AbstractIn rock magnetism, Vibrating-Sample Magnetometer (VSM) data displays magnetic moment in specific magnetic field applied in descending and ascending magnitude, which results in a pattern called hysteresis loop. This loop characterizes different magnetic materials depending on its shape. In recent years, the usage of computer software to analyze hysteresis loop has become necessary due to its precision. Easily executable, intuitive, and user-friendly open-source programs for analyzing VSM data are still not widely available despite their necessary utilization. HYSGUITS was designed with this issue in mind to further improve the development of tools in this field. HYSGUITS is a Graphic User Interface (GUI) to analyze the hysteresis loop of VSM data. MATLAB is a suitable base for producing this GUI compared to other programming language due to its sophisticated features and clean data visualization. This software is able to visualize hysteresis loop in different ways, mainly through the difference of ascending with descending magnetization value and its 1stderivative. The GUI displays the graph as an interactive plot window which provides detailed observation on each data points, supported by features such as interpolation and smoothing. This article introduces of the functionalities of HYSGUITS and demonstrates its utilization with example use case.
Dynamics of West Coast of Sumatra and Island Arc Mentawai during the Coseismic Phase of the Mentawai Mw7.8 25 October 2010 Earthquake
Authors: Marzuki  , Ramadhan Ravidho , Friska Vira , Primadona Herizon , Ramadhan Reza Ananda , Monica Fadilla , Arisa Deasy , Namigo Elistia Liza 
Published: July 2022

Abstract
Sumatra is located along the Sunda megathrust where the Indo-Australian plate subducts beneath the Eurasian plate. This condition provides a favorable setting for the formation of small to large scale earthquakes which can lead to other natural disasters. On October 25, 2010, an Mw7.8 earthquake near Mentawai occurred and followed by a tsunami. The Mentawai Islands and the West Coast of Sumatra’s dynamics were observed before, during, and after the rupture using the Global Positioning System (GPS) technology, widely known as the Sumatran GPS Array (SuGAr) network. RINEX data from several SuGAr’s stations in Mentawai (BSAT, SLBU, PRKB, SMGY, KTET, PPNJ) and West Coast of Sumatra (LNNG, MKMK, LAIS, MNNA) was processed using GAMIT/GLOBK software to obtain the coseismic deformation data. No anomalies were found in the preseismic phase (29 days before the earthquake) that could be used as precursors for the earthquake. The largest deformation was observed at the SLBU station in North Pagai, Mentawai, as a 29.97 cm southwestward coseismic jump and the coseismic jump at the stations in Sumatra (LNNG, MKMK, LAIS, MNNA) was below 3 cm toward the same direction. During the 29 days after the earthquake, plate relaxation at the postseismic phase was observed. This suggest that some period of time is required to recover to its normal deformation trend. This shifted postseismic trend is indicated by a change in the direction of plate movement compared to the preseismic trend.
Intraseasonal Change in Diurnal Cycle of Precipitation over Sumatra from IMERG Observation
Authors: Yusnaini Helmi , Marzuki  , Vonnisa Mutya 
Published: July 2022

Abstract
This study investigates the intraseasonal change in the diurnal cycle of rainfall over Sumatra in terms of Madden Julian oscillation (MJO) phases. Change in the peak time of mean accumulation (PA), frequency (PF), and intensity (PI) of precipitation from Integrated Multi-Satellite Retrievals of GPM (IMERG) final run product version 06 data during 2016-2019 was investigated. Data were classified into active (2,3,4, and 5) and inactive (1,6,7 and 8) MJO. Rainfall in the Sumatra region is generally dominated by short rainfall duration, as found by a previous study. During the active MJO, the increase the number of rain events over the mainland Sumatra is dominated by rain lasting less than 6 h. In the Indian Ocean region, the increase in rain events is dominated by short and long-duration rain. The means of PA and PF during the active MJO showed a significant increase (0.4 mm/h and 10%), especially in the western part of Sumatra. On the other hand, the average PI during the active MJO tends to decrease (~ 1.5 mm/h), especially in the southern mainland of Sumatra. Finally, we found no significant change in the peak time of PA, PF, and PI during the active MJO and inactive MJO.
Fault Zone Identification for Groundwater Flow Assessment Based On Seismic Reflection Survey Data at the Area of Felda Lepar Utara, Pahang, Malaysia
Authors: Putra Ahmad Dedi , Sulaiman Norasiah , Roslan Norsyafina , Jamil Habibah , Alias Khairunnisa 
Published: July 2022

Abstract
Geological structures such as faults and fractures have an important influence in the process of fluid movement below the surface. The hydraulic behavior in aquifers can be determined by proper characterization of fractures, fault zones and their connectivity. In this study, we concern on detection and identification of fault zones in the groundwater basin to verify whether faults in the basin area connect to the surface, and whether the fault zones occurring serve as conduits or barriers for groundwater to flow. The seismic reflection method with Common Depth Point (CDP) profiling technique has been applied in this study. Through this study, we have identified that several large and small-scale faults were found in the study area. Generally, these large-scale faults cut the bedrock (granodiorite) up to impermeable layer. This large-scale fault group can be a barrier that block the groundwater flow. The fault zone is connected to the surface as evidenced by the presence of normal fault that is clearly observed at the surface. This seismic method is good to apply in this study because it can be used to record deeper subsurface conditions, especially for fault zone detection purposes.