bluuebunny/crossref_metadata_2025_split huggingface dataset:
The South African pre-service teacher’s physics pedagogical orientations.
Authors: Sondlo A , Ramnarain U 
Published: June 2020

Abstract
To come up with ways on how teacher training institutions should train pre-service teachers is one of the most discussed topics among teacher educators and researchers. Some of the reasons for this change is to integrate new teaching methods such as inquiry-based learning and problem-solving instructions to mention few. However, it is discovered that most universities provide students with limited exposer to different methods of teaching science. The current study investigates physical science pre-service teacher’s physics pedagogical orientations when they are at university. The phrase orientation denotes teachers’ knowledge and beliefs for teaching science. Pedagogical orientations are classified into four approaches; direct didactic, direct active, guided inquiry and open discovery. To establish the physical sciences pre-service teacher’s physics pedagogical preferences, we used an instrument comprising of five items that portrayed an actual teaching scenario for a physical sciences topic. Each item had four teaching alternative methods and respondents were requested to select the most appropriate choice. A quantitative method was used to obtain teachers pedagogical orientations. The findings indicate that students preferred the direct approach aligned with the direct active, while a smaller group preferred learner-centred orientation.
Unconventional Superfluidity in Ultracold Dipolar Gases
Authors: Domínguez-Castro G A , Paredes R 
Published: June 2020

Abstract
In this manuscript, we discuss the emergence of p-wave superfluidity in a dipolar Fermi gas confined in a double layer array of parallel optical lattices in two dimensions. The dipole moments of the molecules placed at the sites of the optical lattices, separated a distance L and pointing in opposite directions produce an effective attractive interaction among them, except between those dipoles situated one on top of the other. Such interaction between dipoles is precisely the origin of the non-conventional superfluid state. We present the analysis for the ground state of the many-body system within the mean-field scheme. In particular, we study the stable regions, as a function of the system parameters, namely the effective interaction between dipoles and the filling factor n, for which the superfluid state can exist. Following the BKT scheme, we estimate the critical temperature of the superfluid state.
Symmetries of the Renormalization Group Equations
Authors: Juárez W S R , Kielanowski P , Vázquez M L 
Published: June 2020

Abstract
The determination of the renormalization group equations in quantum field theory is a very laborious task. For example in the Standard Model the full set of these equations is known only up to two loops, while only some partial results are obtained at higher orders. We argue that one can simplify the calculation of the renormalization group equations by using the symmetry of a system. The origin of the simplification lies in the use of the invariant polynomials of the symmetry group of the theory. We consider a quantum field theory with three scalar fields that is invariant under the action of the permutation group S
3. We show, using the theorem of Molien, that for such a model there is a significant reduction of the amount of work needed for the derivation of the renormalization group equations.
Time Resolution Simulation Measurement for the Configuration Plastic Scintillator Material+SiPM and its Application to Medical Physics
Authors: Zepeda C H 
Published: June 2020

Abstract
The Silicon Photomultipliers (SiPMs) have been used more frequently in the last years compared to Photomultiplier Tubes (PMT), due to its low cost, lower bias operation voltage and its smaller size, which can be up to 1×1 mm2. In this work, it is shown the time resolution simulation results for two scintillating materials: BC404 and BC422 (20×20×3 mm3 of size)+ SiPM (3×3 mm2 of size). The studies of this configuration can replace the PMT and crystals, commonly used in a Positron Emission Tomography (PET). The time resolution can be improved to be able to make the greatest data collection, to use an isotope with less life time and thus perform less damage to the patient by radiation.
Visible light communication channel with a smartphone screen as a transmitter and color shift keying modulation for access control applications
Authors: Martínez-Ciro R A , Morales-Morales D M , López-Giraldo F E , Rojas-Usuga J D 
Published: June 2020

Abstract
Smartphones or tablets are a new kind of mobile device that allows developers the optical wireless communication. This enables a low-cost implementation interface with a visible light communication system. The present work aims to implement the access control system based on visible light communication channel with a smartphone screen as a transmitter and color shift keying modulation. The proposed system runs on the Samsung Galaxy notebook tablet to control the light colors emitted by the screen. We used Android Studio to develop the application for access control system. In this scheme, the optical response of the Galaxy screen to 4 color shift keying constellation design based on standard color space is also discussed. The proposed system is validated by experimental tests for access control applications. The results obtained suggest that a bit rate of 100 b/s can be achieved with a 4 color shift keying constellation format. It was concluded that the main advantage of using the Galaxy screen as a transmitter in a visible light communication lies in the low complexity to generate color shift keying modulation and its application on access control system. This can generate opportunities for this method to become realistic on mobile consumer electronics.
Experimental characterization of a tuneable all-fiber mode converter device for mode-division multiplexing systems
Authors: Galvis-Arroyave J L , Villegas-Aristizabal J , Montoya-Cardona J , Montoya-Villada S , Reyes-Vera E 
Published: June 2020

Abstract
In this work, we present a novel scheme to make a controllable, stable, and versatile all-fiber mode converter device. The converter consists of a few modes polarization-maintaining fiber, which is laterally stressed using an electrical actuator. The electrical actuator provides a simple mechanism to control the refractive index changes in the optical fiber thought the elasto-optic phenomena. Thus, it is possible obtain a platform to make mode conversion between the HE11 mode and the TE01, TM01 and HE21 modes. Likewise, the proposed methodology allows controlling the modal conversion trough the variation of the applied force. The results reveal that the performance of the converter depends on the input light polarization, the analyzer angle and the applied force. In addition, the device presents a compact size of 8 cm and shows an excellent performance when is analyzed at 980 nm. Thereby, it is suitable to be implemented for future optical fiber communication systems that employs mode-division multiplexing.
Generating density maps for convolutional neural network-based cell counting in specular microscopy images
Authors: Sierra J S , Pineda J , Viteri E , Tello A , Millán M S , Galvis V , Romero L A , Marrugo A G 
Published: June 2020

Abstract
Accurate endothelial cell density with specular microscopy is essential for correct clinical assessment of the cornea. Commercial specular microscopes incorporate automated cell segmentation methods to estimate cell density. However, these methods are prone to false cell detections in pathological corneas. This project aims to obtain a reliable automated cell density from specular microscopy images of both healthy and pathological corneas with convolutional neural networks. Convolutional neural networks require labeled datasets. Thus, we developed custom software for producing a curated dataset of labeled ground-truth images and cell density maps. In this paper, we implemented a fully convolutional regression network to predict the cell density map from the input microscopy image. Encouraging preliminary results show the potential of the method. This approach may pave the way for dealing with the variability of corneal endothelial cell images.
Colombian fruit and vegetables recognition using convolutional neural networks and transfer learning
Authors: Álvarez-Canchila O I , Arroyo-Pérez D E , Patiňo-Saucedo A , Rostro González H , Patiño-Vanegas A 
Published: June 2020

Abstract
Automatic image recognition is a convenient option for labeling and categorizing fruits and vegetables in supermarkets. This paper proposes the design and implementation of an automatic classification system for Colombian fruits, by training a convolutional neural network. A database was created to train and test the system, which consisted of 4980 images, labeled in 22 classes, each corresponding to pictures of the same kind of fruit, trying to reproduce the variability of a real case scenario with occlusions, different positions, rotations, lightings, colors, etc., and the use of bags. On-training data augmentation was used to further increase the robustness of the model. Additionally, transfer learning was implemented by taking the parameters of a pretrained model used for fruit classification as the new initial parameters of the proposed convolutional network, achieving an increase of the classification accuracy compared with the same model when trained with random initial weights. The final classification accuracy of the network was 98.12% which matches the scores achieved on previous works that performed fruit classification on less challenging datasets. Considering top-3 classification we report an accuracy of 99.95%.
Uncertainty as key element in the analysis of X–ray angiography images
Authors: Bravo A , Vera M , Huérfano Y , Manrique Y , Valbuena O 
Published: June 2020

Abstract
The X-ray angiography images are routinely used to assess the blood vessels. The acquisition procedure considers a medical imaging system which allows obtaining views of the vessel while the blood flows thought them. The X-ray source is influenced on the region to be viewed and then, the projection of the all anatomical structures in the champ of view is shown through an image intensifier. The information of the blood vessel is impacted for the other structures. Additionally, the blood and the contrast product required in the acquisition are not mixed homogeneously, producing artifacts in the images. Finally, the noise is also an impact factor in the quality of the angiography images. In the coronary vessel case, the branches of the network are superposed. In this paper, an enhancement procedure to diminish the uncertainty associated to X-ray angiography images is reported. The relation between two versions of the angiograms is determined using a fuzzy connector considering that this relation diminishes the images intrinsic uncertainty. These versions correspond with images filtered with low-pass and high-pass image filters, respectively. The technique is tested with images of the coronary and kidney vessels. The qualitative results show a good enhanced of the angiography images.
FAZIA: a new performing detector for charged particles
Authors: Barlini S , Bini M , Buccola A , Camaiani A , Casini G , Ciampi C , Frosin C , Ottanelli P , Pasquali G , Piantelli S , Poggi G , Stefanini A A , Valdré S , Bonnet E , Borderie B , Bougault R , Chibli A , Cicerchia M , Cinausero M , Dueñas J A , Fabris D , Frankland J , Gruyer D , Henri M , Kordyasz A , Kozik T , LeNeindre N , Lombardo I , Lopez O , Mantovani G , Marchi T , Quicray J , Upadhyaya S , Verde G , Vient E , Vigilante M 
Published: June 2020

Abstract
The FAZIA apparatus is a new detector designed for the Fermi energy domain for charged particles based on three stages telescopes: Silicon detector (300 μm thick), Silicon detector (500 μm thick) and CsI(Tl) (10 cm). Using the ΔE-E technique and the Pulse Shape Analysis (PSA) it permits the charge and mass discrimination up to more than Z=20. In the following, some details about the FAZIA detectors and electronics, their performance and the frst experimental campaigns already performed will be discussed.
Searching for light dark matter at fixed target experiments
Authors: Bondi Mariangela 
Published: June 2020

Abstract
Nowadays deciphering the fundamental nature of dark matter is one of the foremost open questions in fundamental science. In the last years the dark matter experimental program is primarily focused on weakly-interacting massive particles (WIMPs), but in the recent years many innovative dark matter candidates have emerged. One of the most viable models takes into account DM particles in MeV-GeV mass range that are completely neutral under Standard Model forces, but interact through a new force. Small-scale fixed-target experiments at accelerators have unique sensitivities to fully explore these models. Indeed, accelerator experiments can both produce and detect new particles, such as dark matter and the particles mediating new interactions. This article reviews the various experimental techniques to search for light dark matter, i.e. beam dump, missing mass/energy, and visible mediator search experiments.
MRPC Telescope Simulation for the Extreme Energy Events Experiment
Authors: Mandaglio G. , Abbrescia M. , Avanzini C. , Baldini L. , Baldini Ferroli R. , Batignani G. , Battaglieri M. , Boi S. , Bossini E. , Carnesecchi F. , Cicalò C. , Cifarelli L. , Coccetti F. , Coccia E. , Corvaglia A. , De Gruttola D. , De Pasquale S. , Fabbri F. , Fulci A. , Galante L. , Galeotti P. , Garbini M. , Gemme G. , Gnesi I. , Grazzi S. , Hatzifotiadou D. , La Rocca P. , Liu Z. , Maron G. , Mazziotta M. N. , Mulliri A. , Nania R. , Noferini F. , Nozzoli F. , Palmonari F. , Panareo M. , Panetta M. P. , Paoletti R. , Pellegrino C. , Perasso L. , Pinto C. , Piragino G. , Pisano S. , Riggi F. , Righini G. , Ripoli C. , Rizzi M. , Sartorelli G. , Scapparone E. , Schioppa M. , Scribano A. , Selvi M. , Serri G. , Squarcia S , Taiuti M. , Terreni G. , Trifirò A. , Trimarchi M. , Triolo A.S. , Vistoli C. , Votano L. , Williams M. C. S. , Zichichi A. , Zuyeuski R. 
Published: June 2020

Abstract
A simulation tool based on GEMC framework to describe the MRPC telescope of the Extreme Energy Events (EEE) Project is presented. The EEE experiment is mainly devoted to the study of the secondary cosmic muons by using MRPC telescope distributed in high schools and research centres in Italy and at CERN. This takes into account the muon interactions with EEE telescopes and the structures surrounding the experimental apparata; it consists of a dedicated event generator producing realistic muon distribution and a detailed geometry description of the detector. Microscopic behaviour of MRPCs has been included to produce experimental-like data. A method to estimate the chamber efficiency directly from data has been implemented and tested by comparing the experimental and simulated polar angle distribution of muons.
Imbalanced transfer of trade-related air pollution mortality in China
Authors: Zhao Hongyan , Liu Yang , Geng Guannan , Li Xin , He Wenjie , Chen Xiaoting , He Kebin , Zhang Qiang 
Published: June 2020

Abstract
Revealing the determinants and associated impacts of the transboundary pollution caused by trade is a critical issue when promoting the joint control among regions. This interdisciplinary study utilizes physical, economic and epidemiological methods to explore the anthropogenic PM2.5 related mortality driven by interprovincial trade within China and its determinants. The results showed that 68% of the mortality flow in China was from the central and north plain area, with 29% occurring within these regions and 39% flowing to other eastern and western provinces. The high death intensity resulting from higher exports of heavily polluted agricultural and heavy industry products dominated the trade surplus of PM2.5 mortality for the central and northern plains of China; these bring an imbalanced economic return for these regions, with only 43% of the value added generated in interprovincial trade being retained in these regions. Our study provides a more comprehensive picture of how atmospheric pollution deaths were caused by domestic trade within China, which may facilitate the multilateral pollution mitigation actions from an environmentally economic balanced perspective.
Increasing the Production of L-asparaginase from Bacillus substilis RRM-1 by UV-Mutation
Authors: Prihanto A A , Muyasyaroh H , Puspita F I 
Published: June 2020

Abstract
L-asparaginase is an enzyme that can hydrolyze L-asparagine to L-glutamic acid and ammonia. This enzyme has essential usage for food and health. Bacillus subtilis RRM-1 produces enzyme L-asparaginase, yet the production of L-asparaginase from B. substilis RRM-1 still relatively low. Hence, the effort to increase the production of the enzyme is needed. For increasing the enzyme production, the bacteria were mutated using UV rays to increase the production of L-asparaginase. UV rays (15 watts) were exposed to bacteria with a distance of 15 cm and a contact duration of 30, 60, 90, 120 min. Survival rates of bacteria were calculated, and mutant bacteria were analyzed for their ability to produce L-asparaginase. The mutants examined were taken from a 120-minute mutation treatment, which produced six isolates (UV1, UV2, UV3, UV4, UV5, UV6). Mutant UV1 and UV6 showed better results in producing the enzyme L-asparaginase. Moreover, UV6 produces an activity of 8.02 ± 1.22 U/ml. UV6 production is higher than that of B. subtilis RM-1 wild type (3.18 ± 0.65 U/ml). Mutations with UV can produce mutants that can increase enzyme production by three times.
Biological aspect and dynamic population of fringescale sardine (Sardinella fimbriata: Valenciennes, 1847) in Prigi waters Trenggalek, East Java, Indonesia
Authors: Bintoro G , Lelono T D , Deafatmi L 
Published: June 2020

Abstract
Fringescale sardine (Sardinella fimbriata) is one of important species caught in Prigi waters, Trenggalek, East Java. The existence of fringescale sardine as marine fisheries commodity plays an important role in Prigi fisheries community. This research was conducted in Prigi waters from December 2018 to July 2019 aimed to determine the biological aspects, to illustrate some dynamic population parameters, and to identify food composition. This study applied a descriptive method and random sampling for data collection. There were 1,375 fish have been assessed with total length (TL) ranging from 10 cm to 20.4 cm. Results indicated that growth patterns of the fish was negative allometric with length weight relationship equation was W = 0.014L2.804. Sex ratio of male and female obtained was 1: 1. The gonad maturity level analysis found that proportion of mature and immature fish was equal. The gonadosomatic index value was ranged from 0.57% to 2.42%. The values of length at first capture and length at first mature were 15.35 cm and 16.07 cm, respectively. The growth rate equation obtained in this study was Lt = 26.75 (1-e0.92 (t+0.178)). Mortality rates, total and fishing were 1.709 and 0.286, respectively, while the exploitation rate was 0.167. Additional assessment showed that the main food of the fringescale sardine was phylum Arthropods with index of preponderance (IP) value was 61.5%. It can be concluded that the fish was a plankton feeder and status of the stock was in over fishing condition.
Flow cytometric analysis of genome size of Oreochromis niloticus and O. aureus and their interspecific hybrid
Authors: Imron I , Robbisalmi A , Gunadi B , Abdurachman M L 
Published: June 2020

Abstract
Srikandi tilapia, a hybrid resulting from an interspecific cross between female Oreochromis niloticus and male O. aureus, has shown advantages in farming performance. It shows higher productivity in high salinity aquaculture environment than that of both parental lines. From genetic point of view, organismal phenotypes, to some extent might be affected by its genome size or cellular DNA content. This study was aimed to identify the genome size of these two species along with their hybrid. 75 individuals representing three groups, namely two parental lines and its hybrid were sampled and measured for their DNA content by flowcytometry. The mean (±SD) DNA content of O. aureus (1.271 ± 0.0022 pg) was higher but was not statistically significantly different (P>0.0175) from that of the O. niloticus (1.261 ± 0.0022 pg). The mean (±SD) DNA content of the hybrid (1.263±0.001) was in between and was not significantly different (P>0.05) from both parental species. Individual variation of DNA content within species was lower than those between species. No significant difference was observed in DNA content between male and female within the respective groups.
Relationship analysis of N/P ratio and phytoplankton abundance in Ranu Pakis using regression approach
Authors: Lusiana E D , Musa M , Mahmudi M , Buwono N R , Utami K P 
Published: June 2020

Abstract
Ranu Pakis is a natural lake that formed by volcanic activity. The lake waters have many benefits including as a source of irrigation, aquaculture, agriculture, and tourism. The activities around Ranu Pakis have the potential to produce organic waste into the waters. High organic waste and nutrients resulted in eutrophication or high abundance of phytoplankton which threatens biodiversity in the lake. Nutrients in the waters consist of N and P. The ratio between N and P affect the composition and abundance of phytoplankton. The purpose of this study was to analyses the relationship between N/P ratios to the abundance of phytoplankton in Ranu Pakis using quintile regression approach. The results of this study indicated that the effect of the N/P ratio was different on various quintile.
Formula optimization of functional beverages from Sargassum sp., Cinnamomum burmannii, and Curcuma xanthorrhiza Roxb with α-Glucosidase inhibitor activity
Authors: Umam N I , Firdaus M 
Published: June 2020

Abstract

Sargassum sp., cinnamon, and C. xanthorrhiza contain high polyphenols, which play an essential role in inhibiting α-glucosidase activity. The purpose of this study was to determine the optimization of the formula by mixing Sargassum sp. extract, cinnamon extract, and C. xanthorrhiza extract as functional beverages of α-glucosidase inhibitors. This research using the Response Surface Method (RSM) and Box-Behnken with a combination of three factors, namely the concentration of Sargassum sp. extract (A), the concentration of cinnamon extract (B), and the concentration of C. xanthorrhiza extract (C). The response variables consisted of total polyphenol (Y1), and percentage inhibition of α-glucosidase (Y2). The optimum formula was followed by UPLC-MS/MS assay. The best formulation for functional beverages is Sargassum sp. 20%, cinnamon 12.773%, and C. xanthorrhiza extract at 18.5% with of total polyphenols (108.834 mgGAE/100mL) and inhibition of α-glucosidase (64.323%).
Characteristics of Aeromonas hydrophila-infected Catfish (Clarias sp.)
Authors: Kartikaningsih H , Yahya  , Rohman F Z , Jaziri A A 
Published: June 2020

Abstract
Catfish production was affected by Aeromonas hydrophila. This study aims to investigate the effect of A. hydrophila infection on catfish (Clarias sp.). Physical properties (SEM and histology), morphology, and organoleptic test. The results of this study reported that the morphology of catfish infected with A. hydrophila had clinical symptoms, such as swelling on stomach and intestines were black on days 5 to 7, in the skin injured on day two and hemorrhagic on day 6-7, the quality of the meat decreased on the day 7. The organoleptic test indicated that the quality of the mucus, texture, and odor was reduced. Furthermore, the results of the histological test reported stretching of the muscle.