bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of The Susceptibility Value Dry Ink (Toner) From Raw Material Iron Sand Pasie Nan Tigo Beach and Rice Husk Biomass
Authors: Helmita  , Rifai Hamdi , Dwiridal Letmi 
Published: October 2023

Abstract
The competition engaged in manufacture of the dry ink industry (toner) is increasing, with many types of dry ink (toner) emerging from various brands. This makes each brand compete to try to create quality dry ink. However, this is not easy, because raw material for making dry ink is expensive and stickiness of dry ink on the paper can change if the material is modified. The dry ink in this study was made by modifying the raw materials using natural mineral magnetic (Fe3O4) from the iron sand of Pasie Nan Tigo beach, activated carbon from rice husks biomass, and organic polymer Acacia Senegal. Taking into account the mixture of three raw materials in made of dry ink (toner) will affect the characteristics of dry ink (toner), one of the characteristics affected is the large content of magnetic minerals (Fe3O4) in it, it is necessary to test the value of susceptibility in dry ink (toner) to see the amount of magnetic minerals that are still present in the dry ink after mixing. The tool used for testing magnetic susceptibility values here is Bartington Magnetic Susceptibility MS2B. The purpose of this study is to produce quality dry ink with good dry ink paste power (toner) with based the characteristics of the susceptibility value of the dryink (toner). This research method uses extraction and coprecipitation methods and emulsion polymerization methods to increase the strength of the stickiness dry ink (toner) on paper. The results of characterization obtained by range 11924.60 x 10−8m3/kg until 27916.97 x 10−8m3/kg.
The Effect of The Utilization of Gambier Processing Wastewater for Tannery with Variations of Alum and Tunjung on Physical Properties Test
Authors: Ardinal  , Sy Salmariza 
Published: October 2023

Abstract
The study involved variations in the percentage of alum and tunjung added as mordants, with percentages of 0%, 2%, 4%, and 6% used during the processing of wastewater from gambier. To evaluate the physical properties of tanned leather, the researchers followed the SNI 06-0463-1989-A. The findings indicated that using alum (aluminium sulfate) and tunjung (ferrous sulfate) as mordants affected the physical properties of tanned leather. Alum yielded better physical properties compared to tunjung, as evidenced by the higher tensile strength and flexural strength/elongation in the tanned leather treated with alum. The physical properties of tanned leather were found to be significantly influenced by the percentage of alum used, with higher percentages resulting in increased tensile strength and decreased flexural strength. The most effective treatment involved adding 2% alum, which suggests that combining gambier processing wastewater with alum can be a viable method for tanning leather. These findings demonstrate the potential for using alternative chemicals in leather tanning, which may offer benefits in terms of cost and environmental impact.
MATLAB GUI based code for acceleration analysis in learning of kinematics
Authors: Sari Delima Yanti , Ambiyar  , Nurdin Hendri , Purwantono  
Published: October 2023

Abstract
In this study, a code or computer program has been developed as an educational material for courses on kinematics. This code is expected to help the learning of kinematic which mostly uses analysis of velocity and acceleration graphically. By using this code, explanation of velocity and acceleration analysis can be performed by the code/computer program, instead of using the ruler and protractor manually. This eases the teacher and student in learning of kinematic. The code is written based on MATLAB. GUI (Graphical User Interface) is used to make this code as a user friendly kinematic learning media. The calculation of velocity and acceleration is performed based on the method of relative velocity and relative acceleration. This code provides tutorial of velocity and acceleration analysis which is displayed in the GUI screen. The animation of movement and its trajectory is also displayed. In this present research work, acceleration analysis on slider crank mechanism created by the code is presented. The results is compared with the theoritical calculation and the differences are less than 1%. Therefore, the code is considered acceptable and feasible to enrich the learning experience in kinematics.
The Influence of Spin Coating Speed on the Optical Properties of P3HT Thin Film
Authors: Zakaria Nabila Anis , Malik Syed Abdul 
Published: October 2023

Abstract
Spin coating technique has been widely used in the fabrication of thin films due to its ease of use, inexpensive processing cost and providing control over the thickness of the film. Various polymers have been used in fabricating spin-coated thin film and poly(3-hexylthiophene) (P3HT) is one of the prevalent polymers utilized due to its semiconducting properties and flexibility in processing. In this study, P3HT is deposited on pre-cleaned quartz glass by the method of spin coating. The spin coating speed is varied from 500, 1000, 1500, 2000, 2500 rpm and the optical properties of the films are characterized by using a UV-Vis spectrophotometer. The UV-Vis absorption spectra of P3HT designated absorption peaks in the range of 520 nm to 550 nm. It is shown that the absorbance of P3HT is decreased with every increment of the spinning speed. Thus revealing the dependency of P3HT thin films’ optical properties on spin coating speed.
Magnetic Mineral Consistency Analysis the main ingredients of cement and Rowmix materials with Magnetic Susceptibility Method using Bartington Magnetic Susceptibility Type B (MS2B)
Authors: Ningsih Ella Destari , Rifa’i Hamdi , Ratnawulan  , Ramli  , Wijaya Ike Evy , Fauzan  
Published: October 2023

Abstract
Cement has hydraulic properties (mixed with water) will form a bond and harden. Cement-making materials consist of the main ingredients (Limestone, Iron Sand, Silica, and Clay) which are the ingredients in the manufacture of Rowmix in the Rowmill. In the main ingredient there is a magnetic mineral content for the manufacture of Component Compoun. To see changes in magnetic minerals from the cement manufacturing process, it is necessary to analyze the consistency of the material until the initial manufacture. The purpose of this study was to determine the consistency of the magnetic mineral as the main ingredient of cement in the Rowmix manufacturing process. The research method used is rock magnetism using a Bartington Susceptibility Meter Type B (MS2B) which can measure based on mass and volume with 2 different frequencies, namely Low Frequency and High Frequency. This measurement uses 6 different samples, namely the main ingredients of cement (Limestone, Irond Sand, Silica, Clay) and Rowmix materials (Rowmix 1 (RX1) and Rowmix 2 (RX2). From these measurements, the susceptibility values obtained from the main ingredients including Limestone approx. 23.7 x 10−8 m3/kg - 46.6 x 10−8 m3/kg, Irond Sand ranged from 470 x 10−8 m3/kg - 1791.1 x 10−8 m3/kg, Clay ranged from 852.7 x 10−8 m3/kg - 986.4 x 10−8 m3/kg, Silica ranges from 148.2 x 10−8 m3/kg - 166.9 x 10−8 m3/kg, while in Rowmill I process (Rx1) around 133, 4 x 10−8 m3/kg - 180.3 x 10−8 m3/kg, Rowmill 2 (Rx2) 133.4 x 10−8 m3/kg - 244.2 x 10−8 m3/kg, Magnetic susceptibility values in the main material range from 1532 x 10−8 m3/kg up to 2838,6 x 10−8 m3/kg, while the value of Rowmix 1 (RX1) and Rowmill 2 (Rx2) is lower than the magnetic susceptibility value of the main ingredient.
Identification possible preserved 2004 Indian Ocean tsunami deposit collected from Pulot Village in Aceh Besar Regency, Indonesia
Authors: Mitaphonna R , Ramli M , Ismail N , Hartadi B S , Idris N 
Published: October 2023

Abstract
Identification of the tsunami candidate layers deposited by the Indian Ocean tsunami in 2004 has been successfully performed in Pulot Village, located in Leupung district, Aceh Besar Regency, Aceh Province. Based on a study of tectonic activity before and after the earthquake, Pulot Village was reported as one of the potential locations for finding tsunami deposits. Tsunami sediment is collected by inserting a hand drill into the ground more than 1 m deep. The presence of the 2004 tsunami candidate layers was identified according to the Troels-Smith characteristics. Based on our visual analysis, the prospective tsunami layer is found at a depth of 4 cm with a thickness of 8-38 cm, which is characterized by fine-medium sized dark brown sand deposits on weathered paleo soil layers. The sharp boundaries with the layers above and below it and the presence of organic material (plant roots, stems and anthropogenic material) can also be clearly observed in the tsunami deposit layers. The candidate layer for the 2004 tsunami deposit found will be further studied geochemically using a laser-induced breakdown spectroscopy (LIBS) instrument.
Microstructure analysis of Fe3O4/Polypyrrole composite synthesized by Sol-Gel method
Authors: Ramli Ramli , Yulfriska Nidya , Darvina Yenni , Hidayat Rahmat , Jhora Fadhila Ulfa , Gusnedi  
Published: October 2023

Abstract
The composite is a material that is very important in inserting nanoparticles that act as fillers in a matrix. The filler used in this study is Fe3O4 and the matrix used as a polymer is Polypyrrole (PPy). This research aims to analyze the microstructure of Fe3O4
/PPy composite synthesized by sol-gel method. This research was conducted by varying the composition of Fe3O4:PPy including 30%, 40%, 50%, 60%, and 70% w/w. The sample was characterized by Fourier Transform Infrared (FTIR) and Scanning Electron Microscope (SEM). The results of the FTIR characterization, it was found that the Fe3O4
/Polypyrrole has functional groups O-H, C≡C and C=C. The results of SEM characterization, the particle sizes of each variation composition of Fe3O4:PPy 30%, 40%, 50%, and 70% w/w are 3µm, 3.1µm, 4µm, and 4.5µm, respectively. Based on the results of the study, the greater the composition of the polypyrrole, the greater the particle size.
Validity of e-module integrated scientific literacy using the smartphone-assisted IBL model to improve student competence
Authors: Yulkifli Y , Risma M , Festiyed F , Azis H 
Published: October 2023

AbstractCurrently, the integration of digital technology into learning modules is an important factor in developing student competencies in the 21st century era. However, in reality the available modules have not utilized technology in their use, have not loaded and have not been integrated with learning models so that learning is not fully student-centered. Whereas learning models, integrated teaching materials and the use of technology are very important in improving student competence and learning independence. Based on this, this research was conducted to produce e-module physics integrated with scientific literacy using a valid inquiry based learning (IBL) model. The type of this research is R&D with Plomp model. The e-module validity test was carried out by three three validators. The instrument used is a validity test questionnaire. Furthermore, analysis of e-module validation results uses the Aiken’s V formula. The validation results show that the aspect of the validity of the substance of the material is 0.90; visual display 0.86; learning design 0.87; and 0.85 software utilization. Based on the data analysis, the average value of e-module validation is 0.87 with a valid category. Thus, the integrated physics e-module of scientific literacy using a smartphone-assisted IBL model can be applied in learning of physics to improve student competence.
The development of STEM integrated with local context and 21st century skills for teaching fluids for grade 12 science students
Authors: Chanrak Thaweeporn , Pimvichai Jirutthitikan 
Published: October 2023

Abstract
This article aimed to review, analyze and synthesize the literature related to Science, Technology, Engineering, and Mathematics (STEM) education and context-based learning, and 21st century skills. This is documentary research with selected documents related to STEM from the national and international contexts. The teaching steps from these literatures were analyzed by using content analysis. From the analysis, the STEM Integrated with Local Context and 21st Century Skills for teaching Fluids in physics for grade 12 students consisted of seven teaching steps (E2IDCEA): 1) Explore prior knowledge and determine the targeted context, 2) Identify the problem, 3) Investigate the problem and set hypotheses, 4) Design way to solve the problem, 5) Create prototype, test and improve, 6) Exchange knowledge and 7) Application and evaluation. These seven teaching steps were applied in designing a lesson plan for teaching the fluid topic in physics for grade 12 students. Science teachers can explore one example of lesson plan being shown in this paper for more understanding and further apply this new pedagogy into their physics classrooms or other assigned subjects.
Developing geo-literacy situation-based learning in social studies for promoting geo-literacy in grade 11 students
Authors: Khrongchuen Patcharaphon , Buaraphan Khajornsak 
Published: October 2023

Abstract
Situation-based learning is a pedagogy emphasizing the utilization of everyday-life situation in teaching and learning geology, an important, attribute Geo literacy. This research aimed to develop the Geo-Literacy Situation-based Learning Model (GLSBL). This study was a documentary research, which the researchers employed content analysis to analyze five documents related to Geo literacy and Situation-based learning. The result of analysis yieleded the GLSBL model consisted of six teaching steps: 1) Introduce interesting situation, 2) Explore the situation, 3) Construct knowledge of the situation, 4) Apply knowledge, 5) Discuss and conclude knowledge, and 6) Evaluate learning. At final, the authors raised one example of a GLSBL lesson plan in social studies to teach physical environment and human activities topic for grade11. This is one concrete example for other teachers in applying GLSBL in other topics or subjects.
Validity of E-Book Based on Problem-Based Learning with Higher Order Thinking Skills Oriented for Senior High School
Authors: Agustin Silvia , Razi Pakhrur 
Published: October 2023

Abstract
Human resources with a high level of thinking abilities, such as critical thinking, creativity, communication, teamwork, independence, cross-cultural understanding, and ICT literacy, are needed for the growth of the 21st century. However, cultivating a high level of thinking abilities is still insufficient and does not fulfill the necessities of the 21st century. An e-book based on problem-based learning and oriented toward higher-order thinking skills is developed as a result of this research. Measurement of the e-book’s validity is the aim of this study. This research used a descriptive methodology and a questionnaire for collecting data. The questionnaire instrument is a validation sheet with four e-book validation criteria consisting of several indicators. E-book validation has shown valid findings with an average of 0.87 valid categories. The results of the research show that the product can be used as a learning resource for students and teachers to achieve learning goals and meet the demands of the 21st century.
Study experimental time resolution limits of recent ASICs at Weeroc with different SiPMs and scintillators
Authors: Saleem Tasneem , Ahmad Salleh , Cizel Jean-Baptiste , De La Taille Christophe , Morenas Maxime , Nadig Vanessa , Perez Florent , Schulz Volkmar , Gundacker Stefan , Fleury Julien 
Published: October 2023

Abstract
Medical applications, such as Positron Emission Tomography
(PET), and space applications, such as Light Detection and Ranging
(LIDAR), are in need of highly specialized ASICs. Weeroc, in
collaboration with different partners, is highly involved in
developing a new generation of front-end ASICs. In the context of a
joined LIDAR project among Weeroc, CNES, and Airbus, Weeroc is
working on the development of Liroc, an ASIC for space LIDAR
application. Weeroc is also working on advancing ASICs for medical
applications with Radioroc under development and intended to be used
for PET applications.

This study experimentally evaluates the time resolution limits of
these ASICs in different configurations, with some of the most
recent silicon photomultiplier (SiPM) technologies available on the
market, coupled to different scintillation crystals. The best
single-photon time resolution (SPTR) was achieved using FBK NUV-HD
SiPMs with an FWHM of 90 ps with Liroc and 73 ps with
Radioroc. Furthermore, the coincidence time resolution (CTR) of
Radioroc was studied with different crystal sizes. Using a large
LYSO:Ce,Ca crystal of (3 × 3 × 20 mm3) with Broadcom
Near UltraViolet-Metal in Trench (NUV-MT) yields a CTR of 127 ps
(FWHM). The best CTR of Radioroc was determined to 83 ps (FWHM)
with Broadcom NUV-MT SiPMs coupled to LYSO:Ce,Ca
(2 × 2 × 3 mm3)) from Taiwan Applied Crystal (TAC).
Mechanisms of octopus arm search behavior without visual feedback
Authors: Sivitilli Dominic M , Strong Terrell , Weertman Willem , Ullmann Joseph , Smith Joshua R , Gire David H 
Published: October 2023

Abstract
The octopus coordinates multiple, highly flexible arms with the support of a complex distributed nervous system. The octopus’s suckers, staggered along each arm, are employed in a wide range of behaviors. Many of these behaviors, such as foraging in visually occluded spaces, are executed under conditions of limited or absent visual feedback. In coordinating unseen limbs with seemingly infinite degrees of freedom across a variety of adaptive behaviors, the octopus appears to have solved a significant control problem facing the field of soft-bodied robotics. To study the strategies that the octopus uses to find and capture prey within unseen spaces, we designed and 3D printed visually occluded foraging tasks and tracked arm motion as the octopus attempted to find and retrieve a food reward. By varying the location of the food reward within these tasks, we can characterize how the arms and suckers adapt to their environment to find and capture prey. We compared these results to simulated experimental conditions performed by a model octopus arm to isolate the primary mechanisms driving our experimental observations. We found that the octopus relies on a contact-based search strategy that emerges from local sucker coordination to simplify the control of its soft, highly flexible limbs.
The Solution for Building and Developing a Community-based Tourism Model in Ly Son Island District – Quang Ngai Province
Authors: Trang N T T 
Published: October 2023

Abstract
Community-based tourism (CBT) is one of the forms of tourism that is being formed and developed in rural Vietnam on the basis of exploiting the value of eco-tourism resources, agriculture, and indigenous cultural lifestyles. Ly Son Island District in Quang Ngai Province is home to the Imperial Hoang Sa Navy. On the island, there are unique natural landscapes exploiting tourism services such as Thoi Loi Volcano, Gieng Tien, Hang Pagoda, To Vo Gate, etc. With a long history of development, Ly Son has rich cultural resources, many historical relics, and a rich system of tangible and intangible cultural heritage. However, the development of community tourism here has become uncontrolled and fragmented; at this point, there is no link between community tourism services, and they have not yet formed a complete product to meet visitors’ requirements. With the participatory approach, in-depth interviews, fieldwork, and ABCD method (Assets Based for Community Development), this study analyzes the potential, current situation, and orientation of building and developing a model of CBT at Ly Son Island district, Quang Ngai.
Magnetic, morphological, and photocatalytic studies of Cu2+ doped Mg-Zn ferrite nanoparticles
Authors: Pund Sangita N , Nagwade Pratik A , Nagawade Arvind V , Thopate Shankar R , Bagade Arun V 
Published: October 2023

Abstract
Due to their distinctive characteristics, including their optical, catalytic, electrical, and magnetic properties, spinel ferrite nanoparticles attract more interest. Also, the substitution of transition metals like copper in ferrites has the potential to control their physical characteristics and could improve their catalytic and magnetic capabilities. Cu2+ doped Mg-Zn ferrite samples show a change in behaviour from superparamagnetic to soft ferrimagnetic. The photocatalytic studies for the CuxMg0.5Zn0.5-xFe2O4 (x= 0.1 to 0.5, and Δx= 0.1) nano-ferrites are conducted in visible light to investigate the methylene blue photodecomposition capability. The Cu-Mg-Zn nano-ferrites displayed unique behaviour in terms of Magnetic, and photocatalytic activity. These outcomes show that the Cu-Mg-Zn ferrite samples are apply to water remediation.
Modification in Magnetic Properties of CoFe2O4 Ferrite Nanoparticles Induced by 100MeV O+7 Ion Irradiation
Authors: Chandra Grish , Srivastava R C , Reddy V R 
Published: October 2023

Abstract
In this work CoFe2O4 ferrite nanoparticles were prepared via sol-gel method using citric acid as chelating agent. The prepared nanoparticles was sintered at 700°C and the crystallite size is found 34 nm. In this investigation the effect of irradiation of 100 MeV O+7 beam on these nanoparticles with two fluences 5×1012 and 5×1013 ions/cm2 are studied. After irradiation the crystallite size is found to be reduced which is confirmed by transmission electron micrograph. The retentivity and coercivity changes with a measurable value while the saturation magnetization reduces slightly. The value of remanent magnetization increased from 30 emu/g to 34.6 emu/g, it can be attributed to increase of magnetic hardness. The increase in squareness ratio after irradiation leads to increase in anisotropic energy barrier of CoFe2O4 ferrite nanoparticles. Anisotropy field about doubles after irradiation and corresponding anisotropy constant also doubles with the used fluences.
Molybdenum powder coating on steel substrate to study three body wear resistance
Authors: Umashankar Darshan , Thakshak D S , Nayaka Deekshith J , Hiremath Shivakumar R , Suhas R D 
Published: October 2023

Abstract
Steel rollers are most commonly used in conveyor system across different industries like mining and construction. In the conveyor rollers used in mining industry, the steel specimen of the roller is in continuous contact with another metal of the same or different material rolling and sliding on that surface. In this motion of the roller, the third body i.e., the sand, grits and dust of various sizes may be entrapped in the interface of the roller material. The third body induced causes the wear due to its abrading action. To reduce this abrading action, a layer of molybdenum coating is developed on the steel substrate to improve its wear resistance by using the plasma spray technique, a thermal spray method. The experimental procedures were performed according to standard ASTM G65 method. The results were compared and tabulated in full factorial method. The SEM and EDAX results were obtained. The average specific wear rate [Ks] of the coated specimen is reduced by 30% when compared with the uncoated specimen.