bluuebunny/crossref_metadata_2025_split huggingface dataset:
The influence of think pair share model and crossword puzzle to increase primary school students’ mathematical learning interest
Authors: Rohman Taufiqur , Surachmi Sri , Murtono  
Published: March 2021

Abstract
The purpose of this research (1) Analyzing the influence of the Think Pair Share model on students’ learning interest in Mathematics at SD 2 Ngembalrejo Bae Kudus (2) Analyzing the influence of the crossword puzzle media on students’ learning interest in Mathematics at SD 4 Ngembalrejo Bae Kudus (3) Menganalisis Hasil Pengaruh model think pair share media crossword puzzle terhadap minat belajar siswa pada mata pelajaran Matematika at SD 5 Ngembalrejo Bae KudusThis type of research is included in the type of field research, namely research in which researchers go directly to the field to obtain data or information directly by visiting respondents. The method used is a quantitative method of data analysis with statistics. In this study, the authors conducted a field study at elementary schools in the village of Ng rejo. The population in this study consisted of Grade 5 students in three elementary schools, namely SD 2 Ngembalrejo, SD 4 Ngembalrejo and SD 5 Ngembalrejo by using simple random sampling technique. In this analysis, the authors used statistical analysis, namely simple regression and correlation.. The results showed that 1) Think Pair Share model on students’ learning interest in Mathematics at SD 2 Ngembalrejo Bae Kudus in a good category, is 51 in the interval range 43 - 49. 2) crossword puzzle media on students’ learning interest in Mathematics at SD 4 Ngembalrejo Bae Kudus in very good category, yairu 53 in the interval range 52 - 56. 3) There is a significant effect of the think pair share model and crossword puzzle media on students’ interest in learning mathematics at SD 5 Ngambatrejo Bae Kudus, with a regression equation Ŷ = 69.253 + 0.49 X. The Think Pair Share method with crossword puzzle media has a positive and significant amounting to 0.068 which is included in the strong category and can contribute to students in developing student interest in learning by 0.462%.
Analysis of 4C-Based HOTS Assessment Module on Critical Thinking Ability
Authors: Kurniawan Tigas Tri , Santoso  , Utaminingsih Sri 
Published: March 2021

Abstract
This study aims to analysis of 4C-based HOTS assessment module on critical thinking ability of sixth grade elementary school children. This research type is correlationalnon-experimental research with the form of ex post facto. The sampling technique used is the type of cluster random sampling. The data were obtained using a student and teacher response questionnaire. Data analysis using descriptive method. The results showed that 83,2% of students and 80% of teachers gave positive responses to the use of the 4C-based HOTS assessment module. Learning using the4C-based HOTS assessment module is more guiding students to think critically in solving problems.
Hollow electron lenses for beam collimation at the High-Luminosity Large Hadron Collider (HL-LHC)
Authors: Redaelli S. , Appleby R.B. , Bruce R. , Brüning O. , Kolehmainen A. , Ferlin G. , Foussat A. , Giovannozzi M. , Hermes P. , Mirarchi D. , Perini D. , Rossi A. , Stancari G. 
Published: March 2021

Abstract
Electrons lenses produce a high-intensity electron beam and
have a variety of applications to circular hadron
accelerators. Electron beams of different transverse cross sections
and distributions may be designed, depending on the desired
application, and they are produced and steered along the orbit of
the hadron beam, overlapping with it for typical distances of a few
meters before being deflected away and disposed of. Hollow electron
beams find applications to high-intensity beam collimation for
machines like the CERN Large Hadron Collider (LHC). Such devices
can be integrated in a collimation system to improve the
halo-cleaning performance through an active control of the halo
dynamics: the annular distribution of the electrons excites
resonantly the beam tails surrounding the beam core, while the core
itself remains unperturbed, as ideally it only “sees” the
field-free “hole” in the electron distribution. Hollow electron
lenses are part of the upgrade baseline of the High-Luminosity
project of the LHC (HL-LHC) and will be installed in the machine
during a long shutdown in 2025–2027 to mitigate effects from beam
losses so to improve the collimation system performance. This paper
describes the hollow electron lens project within the HL-LHC
collimation upgrade.
Self-consistent PIC simulations of ultimate space charge compensation with electron lenses
Authors: Stern E. , Alexahin Yu. , Burov A. , Shiltsev V. 
Published: March 2021

Abstract
Further progress of fundamental particle physics requires
high intensity and high brightness of accelerated proton and ion
beams. This goal is essential for the FAIR hadron beams at GSI, for
the neutrino production at the facilities such as Fermilab and
JPARC, and for the Large Hadron Collider luminosity at CERN. One of
the most formidable obstacles toward that goal is the beam's own
space charge, whose forces cause beam emittance growth, losses and
lifetime degradation. Typically, such effects become intolerable
when the space charge tune-shift parameter Δ QSC exceeds
∼ - (0.25–0.5). To reduce these detrimental effects, it
was suggested to use electron lenses to compensate the space charge
forces. This paper reports on detailed particle-in-cell space charge
and electron lens compensation simulations for extremely intense
proton bunches whose space charge tune-shift parameter exceeds
-1.0. Different scenarios were evaluated based on reduction in the
emittance growth and particle loss at a 4σ aperture. We
investigate phenomena and issues related to the focusing lattice
errors, importance of the transverse and longitudinal matching of
the electron beam profiles to the proton ones, and vary the strength
and the number of the electron lenses distributed around a circular
machine to optimize the reduction of harmful space charge effects.
Landau Damping with Electron Lenses in Space-Charge Dominated Beams
Authors: Alexahin Y. , Burov A. , Shiltsev V. 
Published: March 2021

Abstract
Further progress of fundamental physics requires accelerated
beams of high intensity. The intensities, however, are limited by
many factors, including coherent beam instabilities. Usual methods
to control the instabilities, such as octupole magnets, beam
feedback dampers and employment of chromatic effects, may be
ineffective or insufficient. Electron lenses were proposed as a
means to provide stabilizing spread in the beam betatron
frequencies. It was shown that electron lenses are uniquely
effective for Landau damping of transverse beam instabilities in
high energy particle accelerators, and that their employment does
not compromise incoherent (single particle) stability, dynamic
aperture and the beam lifetime. Here we consider effectiveness of
the Landau damping with electron lenses when the space charge tune
shift cannot be neglected. We demonstrate that the desired stability
can be assured with proper choice of the electron beam parameters
and current distributions.
On the possibility of footprint compression with one lens in nonlinear accelerator lattice
Authors: Danilov V. , Shiltsev V. 
Published: March 2021

Abstract
Electromagnetic interaction of colliding beams along with
other nonlinear fields often limits the beams' lifetimes and
luminosities. Nonlinearities result in the spread of betatron
frequencies (footprint) and, thus, may enhance dynamic diffusion of
particles due to high order resonances. One of the possible ways to
eliminate nonlinearities and overcome the corresponding difficulties
is compensation of nonlinear forces, but, in practice, it is hardly
possible to obtain exact linearity of the system. The compensation
with a single nonlinear lens cannot cope with distributed
nonlinearities, nonlinearities due to parasitic crossings, etc. In
the article, we present a method to compute parameters of nonlinear
element (lens) that eliminates both the footprint and resonance
strength without achieving full compensation.
Design of a compact, cryogen-free superconducting solenoid for the electron lens of the Fermilab Integrable Optics Test Accelerator (IOTA)
Authors: Dhuley R.C. , Boffo C. , Kashikhin V. , Kolehmainen A. , Perini D. , Stancari G. 
Published: March 2021

Abstract
The proposed electron lens for Fermilab's Integrable Optics
Test Accelerator (IOTA) will broaden its capabilities by enabling
new research in nonlinear integrable optics, space-charge
compensation, proton beam cooling, and more. The electron lens is
based on a 5–10 keV, 1–2 A electron beam, shaped using a 0.7 m
long, 0.8 T solenoidal magnetic field. A cryogen-free
superconducting solenoid has been designed to provide this
solenoidal field, taking into consideration the constraints on
space, utilities, and infrastructure in the IOTA experimental
hall. The solenoid is made of copper stabilized niobium-titanium
conductor, conduction-cooled using 4 K closed-cycle
cryocoolers. This paper describes the overall design of the solenoid
encompassing its mechanical construction, current leads
optimization, cryogenic thermal modeling that provides estimates of
cooldown time and static/dynamic heat loads, and quench analysis.
Analysis of the feasibility of Bali cattle breeding business in Barru Regency, South Sulawesi, Indonesia
Authors: Kusumastuti A , Indrawirawan  , Suwignyo B 
Published: March 2021

AbstractThe Indonesian Ministry of Agriculture legislates Barru Regency in South Sulawesi as a Bali cattle breeding. The purpose of this study calculates the feasibility of the Bali cattle breeding business. The research conducted in Tanete Riaja District, Barru Regency, South Sulawesi. The number of respondents is 75 farmers determined by purposive sampling. This study used survey methods and data collected by observation and interviews using a questionnaire. Primary data such as the characteristics of respondents, component and price of inputs and outputs. The feasibility analysis of the Bali cattle breeding business used the Net Present Value (NPV), Benefit-Cost Ratio (BCR), Internal Rate of Return (IRR), and Payback Period (PP). The results show the Bali cattle breeding business with average ownership of 3 cows and a five-years investment period is workable with an NPV value of IDR 9,099,674, BCR of 1.22, IRR of 16.85% and PP for 4.40 years.
Uptake capacity of zeolitic tuff from Gunungkidul, Indonesia for environmental and agriculture application
Authors: Budianta W 
Published: March 2021

Abstract
Zeolitic tuff samples from Gunungkidul Yogyakarta, Indonesia was investigated for mineralogical and chemical composition and its uptake capacity. Five zeolitic tuff samples were obtained from the field and measured for the mineralogical, chemical composition, and uptake capacity by XRD analysis, ICP AES, and BaCl2 method, respectively. The result of mineralogical composition showed that the mordenite type-zeolite was found as significant zeolite mineral, with percentages varying from 24.1% to 38.1% and with an average amount of 34,3%. Chemical analysis revealed that the mordenite contents influenced amounts of SiO2 ranging between 60.06% to 66.06% and Al2O3 from 12.12% to 13.57%, and this Si/Al ratio obtained. The measured uptake capacity or cation exchange capacity (CEC) value varies from 67 meq/100 g to 98 meq/100 g with an average value of 82,4 meq/100 g. The vary of these values most probably was influenced by the differences in the percentage of zeolite minerals and other mineral impurities. Mordenite type of zeolite is thought the most affected of the uptake capacity, while clay minerals contribute to a relatively small influence. The uptake capacity of the five zeolitic tuff studied showed positive correlations with the content of mordenite-type zeolite as well as with the total content of microporous minerals and Si/Al ratio. These materials could be an excellent material candidate in a wide range and scale of agricultural, and environmental applications.
DEM and land slope based method of RUSLE LS factor calculation for soil erosion assessment
Authors: Yudhistira A , Setyawan C , Ngadisih  , Tirtalistyani R 
Published: March 2021

Abstract
Soil erosion is one of the essential factors causing land degradation in tropical regions. The application of a model for soil erosion calculation enables a rapid assessment with a reliable result. The Revised Universal Soil Loss Equation (RUSLE) is the most used soil erosion model which can be applied under various climate conditions. This study was conducted to evaluate the performance of the Digital Elevation Model (DEM) and land slope-based method to estimate the RUSLE LS factor value for soil erosion calculation in the upstream of Progo Watershed Indonesia. Parameters of the RUSLE model including LS factor estimation in a DEM based were calculated by using a Geographic Information System (GIS) tool and presented in 30 meters grid size. RUSLE model validation was performed by using reference value from two different studies in Java Island, Indonesia. The result revealed that average soil erosion in the study area was 71.12 tons/ha/year based on the LS factor calculated by using DEM. Whereas, average soil erosion based on LS factor calculated by using land slope-based method was 438.68 tons/ha/year. According to the RUSLE model validation value, the RUSLE LS factor calculation by using DEM was more accurate than the LS factor calculated by using the land slope factor. This study provides a useful reference for soil erosion study particularly to develop methods for RUSLE model parameter assessment under different climate conditions.
The effect of hay alfalfa (Medicago sativa L.) supplementation in different basal feed on the feed intake (FI), body weight, and feed conversion ratio of hybrid ducks
Authors: Suwignyo B , Suryanto E , Samur S I N , Hanim C 
Published: March 2021

AbstractThis study was conducted to determine the effect of hay alfalfa supplementation (Medicago sativa L.) in different basal feeds on the feed intake (FI), live weight (LW), Feed Conversion Ratio (FCR), and income of Hybrid Duck. In vivo trial was conducted with 120 MA hybrid ducks (Mojosari x Alabio), based on completely randomized design (CRD). Three (3) treatments and 6 replications with each repetition consisted of 5ducks. The treatments were P1 = radom mixed feed, P2 = 90% radom mixed feed + 10% hay alfalfa and P3 = 90% alternative feed + 10% alfalfa hay. Feed was obtained in dry matter but offered as fed. Feed and drinking water was offered ad libitum. The observed variables included feed consumption, live weight, feed conversion ratio (FCR), and income over feed cost. The data obtained were analyzed with the application of Statistical Product for Service Solution (SPSS) version 22 and if there was significant differences in treatment it would be further tested using Duncan’s Multiple Range Test (DMRT). The results showed that 10% alfalfa supplementation in free mixed feeds and alternative feeds showed a significant effect (P <0.05) on the value of feed consumption, but not with the other variables. Based on these results it can be concluded that three type of feed has similar potential as feed for duck. However, radom mixed feed treatment with 10% alfalfa hay supplementation (P2) is the most optimum treatment among the other treatment feeds, due to the highest live weight income value.
The Effects of NaOH Treatment and Drying Method of the Protected Lemuru Fish Oil on In Vitro Fermentation Gas Production
Authors: Dewi R R , Kustantinah  , Muhlisin  
Published: March 2021

Abstract
This study was intended to examine the effect of a combination of different NaOH concentration treatments and drying methods on the in vitro total gas production. The materials used in this study were lemuru fish oil and the capsules were starch, caustic soda, CaCh, and the chemicals for in vitro gas test analysis. This study applied a Completely Randomized Design (CRD) on 3x2 factorial and 3 replications. The parameters observed in the experiment included the total gas production. The data in this study were tested using an analysis of variance and continued with the Duncan test. The results of this study indicated that there is no interaction between the different NaOH concentrations and the drying method on the total gas production. Based on these results, it can be concluded that the difference in the NaOH levels in lemuru fish oil and the drying method has no effect on the rumen fermentation. The gas production from fractions a, b, and a + b in the sun drying method was significantly higher than on the oven drying method.
Effect of addition cilembu sweet potato extract (Ipomoea batatas Cilembu) as a prebiotic source for the kinetics of fermentation and lactic acid production by Lactobacillus paracasei
Authors: Swithenia F , Bachruddin Z , Kurniawati A , Yusiati L M 
Published: March 2021

AbstractThis study aims to determine the fermentation kinetics ofLactobacillus paracaseiwith the addition ofCilembusweet potato extract as a prebiotic source. Research carried out by determining theKmconstant onL. paracaseigrowth by analyzing the decrease in the substrate.L. paracaseigrown into a defined medium with the addition of substrate with concentrations of 0.01%, 0.05%, 0.1%, and 0.2% and observed a substrate utilization at 0, 6, 18, and 24 hours with the total carbohydrate test using Anthrone.Km constantis reviewed by observing the pH levels, lactic acid production with the addition of substrates as much as 0,5Km(1%),Km(2%) and 1,5Km(3%). Substrate efficiency were calculated from lactic acid levels production for every concentration. Processing of research data will use a Completely Randomized Design (CRD), and if significant will continue with Duncan’s Multiple Range Test (DMRT) analysis. Based on the results obtained, 1,5Kmsubstrate concentration shows higher consumption of substrate, lower pH, and higher lactic acid compared to 1% and 2% substrate butKmconcentration shows higher substrate efficiency than 1,5Km
The Variability of Qualitative Traits in Promising Rice Lines
Authors: Aristya V E , Taryono  , Trisyono Y A , Mulyo J H 
Published: March 2021

Abstract
Rice is one of the world’s oldest important crops. Qualitative traits can be useful for the identification of promising rice lines. In this study, seventeen advance rice lines were evaluated for qualitative traits. This assessment was carried out to analyse the variability in genotypes, based on 49 important qualitative traits of rice. Data on morphological parameters was collected from each line at suitable phase of growth to check variation. Findings were recorded according to descriptors for rice. Dendrogram was constructed which divided all the genotypes into seventeen major clusters, each subdivided into smaller sub-clusters. The pattern of cluster based on qualitative traits revealed the wide genetic variation. A high level of genetic variability based on qualitative traits was observed in this study. The genetic improvement of the rice needs the availability of genetic variability in promising lines. Significant phenotypic information and these variability has potential to develop quality rice for future breeding programs.
Preliminary study on the fermentation medium of the black garlic production
Authors: Anoraga S B , Sari A R , Wikarta J , Sabarisman I 
Published: March 2021

Abstract
The present work shows the potential of the natural material which commonly used javanese to be applied as fermentation medium on black garlic production. Black garlic processed by conventional fermentation using rice cooker for 10, 15 and 20 days. Three materials were used as medium, such as bamboo chambers, clay chambers and alluminium foil. The quality parameters were weight loss, moisture content, and TDS (brix %). The experimental design used in this study was a Completely Randomized Design (CRD) with a single factor experiment. The measurement result was obtained by using ANOVA statistical analysis and further testing with the Duncan method in the SPSS program. Black garlic was processed using natural material like bamboo chamber (besek) and clay chamber (kendil) for fermentation medium have shown lower weight loss and higher total soluble solid (%brix) than modern method using alluminium foil. Natural material affected total soluble solid (%brix) of black garlic significantly (p < 0.05). TSS (%brix) increased during fermentation process whereas pH decreased from pH 6,1 to 3,6.
Nonlocal effective-medium theory for periodic multilayered metamaterials
Authors: Wen Zhengji , Xu Hao , Zhao Wenchao , Zhou Ziji , Li Xiaowen , Li Shimin , Zhou Jing , Sun Yan , Dai Ning , Hao Jiaming 
Published: March 2021

Abstract
Spatial-dispersion (nonlocal) effects are non-negligible in periodic multilayered metamaterials under certain specific conditions, which cannot be completely understood based on the local effective-medium theory, even though the metamaterials are constructed by deep subwavelength meta-atoms. Here, we present a simple yet robust effective-medium model for such media in which the nonlocal effects are properly considered. Our proposed nonlocal model is established by the analysis of the dispersion relation of the effective medium without any expansion-based approximation, which is applicable for description of the optical behavior of the multilayered metamaterials even under critical conditions, and works well for both TE and TM polarized waves. We believe our model will be a powerful tool for the investigation of electromagnetic nonlocality in the realm of metamaterials and subwavelength optics.
High-throughput search for RE (La, Ce and Y) contained stoichiometric compound in steels
Authors: Ma Cainv , Lv Meng , Gao Xueyun , Wang Haiyan , Wei Huihui , Gao Shiyi 
Published: March 2021

Abstract
The design of rare earth (RE) bearing steels requires a thorough understanding of the formation tendency of RE involved phases in steels, while searching for binary and ternary compounds with a wide variety of composition and permutation need a remarkable amount of experimentation which is nearly infeasible. In the present work, we perform a thorough search for the RE-contained compounds in steels by a data-driven high-throughput computational approach. The search results indicate that RE may react with O and N to form a large amounts of oxide and nitride inclusions, while only Y participate in the formation of sulfide inclusion Y2MnS4 and Y2CaS4. For the case of ternary compounds in Fe-based solid solution, it is found that RE prefers to form ternary phases with the non-metallic elements, i.e., B, C, O, P and Si, and only Y is found to combine with metal Cr to form YCr4Fe8. Finally, our screen suggests that RE can participate in the formation of the nano-scale precipitates of κ-carbides, L12 precipitates and B2 precipitates, but MC and M2C carbides.
On the digital twin application and the role of artificial intelligence in additive manufacturing: a systematic review
Authors: Bartsch Katharina , Pettke Alexander , Hübert Artur , Lakämper Julia , Lange Fritz 
Published: March 2021

Abstract
Additive manufacturing (AM) as a highly digitalized manufacturing technology is capable of the implementation of the concept of the digital twin (DT), which promises highly automated and optimized part production. Since the DT is a quite novel concept requiring a wide framework of various technologies, it is not state of the art yet, though. Especially the combination with artificial intelligence (AI) methods is still challenging. Applying the methodology of the systematic review, the state of the art regarding the DT in AM with emphasis of required technologies and current challenges is assessed. Furthermore, the topic of AI is investigated focusing the main applications in AM as well as the possibility to integrate today’s approaches into a DT environment.