bluuebunny/crossref_metadata_2025 huggingface dataset:
The Affordances of 3D Mixed Reality in Cultivating Secondary Students' Non-Cognitive Skills Use and Development in the Engineering Design Process
Authors: Hite Rebecca , McIntosh Andrew
Published: April 2020

Ascribed as skills of the 21st century or soft skills, non-cognitive skills include the ‘4Cs' of communication, collaboration, critical thinking, and creativity as well as persistence, resilience, and grit: requisite abilities for engineers of today and the future. This chapter presents a single illustrative experimental case study of 16 seventh grade students who designed boats using the engineering design process (EDP) and 3D mixed reality (a combination of virtual and augmented realities) to understand students' non-cognitive skill use and perceived growth. Qualitative data converged to suggest that critical thinking, creativity, and grit were the most salient skills used (observed) and developed (reported). Further, findings indicated that the MR technology (zSpace) was easy to use and helped students with enhanced 3D visualization (immersion) and control (interaction) of designs. Collaboration and communication were perceived as skills that had decreased and were less observed. This research provides insight to how MR elicits secondary students' non-cognitive abilities in STEM.
Factors That Enable or Hinder the Implementation of Game Development Activity in Learning Environments
Authors: Hava Kevser , Guyer Tolga , Cakir Hasan
Published: April 2020

This study aims to investigate the factors that enable or hinder the implementation of game development activity in the instructional process. One instructor and 15 gifted students between the ages of 11 and 15 took part in the study. The students developed computer games related to science topics using MS Kodu game engine within the implementation process. According to the findings, it is seen that instructional practices have great importance, and the instructor plays a key role in the activity. Making and playing games have been the greatest motivation resource for students. In addition, the social environment can be an important tool in sustaining students' motivation levels. The students' negative attitudes toward educational game topics and non-computer activities hinder the successful implementation of the activity. The MS Kodu game engine might be appropriate for novice designers but not be enough for teaching programming concepts. Team-based game development activity is believed to be useful for developing advanced games and increasing the level of interaction between students.
Growth in Sport Media and the Rise of New Sport Fandom
Authors: Kim Andrew , Qian Tyreal Yizhou , Lee Hyun-Woo , Mastromartino Brandon , Zhang James J.
Published: April 2020

Most aspects of life in contemporary societies permeate and are reciprocally influenced by the media. Sports are no exception. Each has influenced and depended on the other for its popularity and commercial success. Sports fans are individuals interested in and following sports through their psychological connections with teams or athletes. Nowadays, sports fans can watch different kinds of sport games or follow their favorite teams and athletes via various media platforms. Modern technology has substantially transformed the ways sports are consumed and has even created new platforms, such as esports. This chapter highlights modern sport fandom by starting from an overview of its growth with mainstream media and disentangling the currently intertwined dynamics of emerging trends. In particular, the authors discuss modern sport fandom by shedding light on the similarities and differences, underlining what causes, channels, and sustains individuals to consume sports, examining the consequences and results of fandom and highlighting contemporary research and developmental trends.
Esports Fandom and the Collegiate Student-Athlete Experience
Authors: Stuetz Kelley , Waddell Julia Crouse
Published: April 2020

eSports audiences have gratifications that must be met. Online gaming provides access to gamers to create community and gain virtual reality skills within the online world. Through information seeking and virtual gratifications, gamers have a need to establish relationships and learn new skills in their game of choice. The event of competitive gaming has become so popular that it is not uncommon for college students to create an organization on campus around eSports. eSports has been studied in the disciplines of audiences, college athletics, and online learning communities; however, few have examined the importance of eSports spectatorship and the student-athlete experience. Using the extension of Hall's Encoding and Decoding model of Active Audience Theory, this research will identify the effects of audiences and spectatorship within the collegiate eSports fandom experience.
Mobile Gaming Strategic Communication and Fear of Missing Out (FoMO) in Fan Culture
Authors: Perreault Mildred F. , Perreault Gregory P.
Published: April 2020

This study examines a case study of the messages and strategies used in mobile game marketing and communication specifically of fans at the Final Fantasy Brave Exvius Fan Festa in December 2018. Through a lens of fear of missing out (FoMO) theory and understanding of fan communities, user-generated content, and public relations pseudo-events, this chapter seeks to understand the impressions of the fan community associated with the game. Through interviews and observations at the event as well as analysis of the online messages shared with individuals who played the games, the study seeks to explain the way players interact with the organization and its promotional materials. A discourse-analysis of the statements creates a window into the gameplay practices of these fans as well as an explanation of their relationship with in-game marketing and communication practices.
Is the News Cycle “Real”?
Authors: Daniel, Jr. Emory S. , Perreault Gregory P. , Blight Michael G
Published: April 2020

This chapter features a game from the Shin Megami Tensei series called Persona 5. This chapter examines how the case of role playing video game Persona 5 depicts agenda setting through the use of an in-game audience-oriented polling systems and comment system in order to understand to a greater degree the ways in which games contribute to our understanding of media processes and explores the idea of fandom as integral to the agenda setting process. The case chapter addressed in this manuscript represents a unique narrative featuring a daily life simulator, a turn-based Japanese role-playing game (JRPG), and complex in-game media vehicles to drive the story.
A Pathway to “Becoming”
Authors: Richmond Chantelle A. M.
Published: April 2020

In Canada, an exciting transformation has taken place within the context of Indigenous health research and scholarship. As Canadian universities strive to embrace processes of indigenization, the author takes the position that much can be learned from the Indigenous health experience. Drawing in large part from her own journey into Indigenous health scholarship, first as a student and now as an academic leader, the goal of this chapter is to describe the author's pathway “to becoming” an independent Indigenous health scholar. Herein she shares stories that describe how her pathway—and her continued learning as a researcher, teacher, and mentor—has been shaped by the powerful experience of being engaged in these Indigenous health training environments. She describes the important sense of belonging and success she achieved from learning in such indigenized environments, but also of the internal struggles she has experienced when attempting to bridge these powerful practices within the wider university context, where the same openness to indigenized ways of learning and doing has not been similarly embraced.
Fostering Allyship in Ourselves and Our Students
Authors: Vaccaro Annemarie , Olerio John , Knibb Jana , Forsythe Desiree , Capobianco Karin , Baylor Chiquita
Published: April 2020

This chapter focuses on the development of allyship in higher education contexts. The findings discussed are the result of a 10-week duoethnography project conducted by one faculty member and five doctoral students who are also higher education practitioners. Group dialogue and individual memoing revealed central struggles in considering approaches to cultivating social justice allyship with undergraduate students. There is a certain tension in trying to promote allyship to privileged students as something more than individual sacrifice while also properly acknowledging and communicating the risks inherent in decentering systems, structures, and institutions that benefit from white supremacist, sexist, ableist, heteronormative hegemony. The duoethnographic data are presented to encourage readers to become active participants in making meaning of the various perspectives on allyship.
Service-Learning and Social Justice for College and University Students
Authors: Brand Susan Trostle
Published: April 2020

All students deserve access to the types of learning that enable them to experience firsthand the rich diversity of life to understand the challenges that others face in their everyday living and to learn collaborative and impactful problem-solving skills to help combat inequality at the local, national, and international levels. A perusal of service-learning addressed in this chapter includes an examination of the benefits for both the participant and the recipient. The chapter addresses the need for service-learning for people who are marginalized because of their gender identity or sexual preferences, disabilities, class, race, gender, age, or a combination of factors associated with marginalization. Recommended practices for ensuring successful service-learning projects and various types of service-learning are discussed. Six sequential steps in implementing a service-learning project are delineated. The chapter concludes with examples of local, regional, national, and international service-learning projects and testimonials from recent local and international service-learning providers.
Examining Teacher Candidates' Evolution of Teaching Belief
Authors: Li Shikun
Published: April 2020

By using video feedback as a treatment, this quasi-experimental study is aimed to capture the dynamic evolution process of teacher candidates' belief of comprehensible input. It compares the changes in teacher candidates' belief of comprehensible input among different feedback groups. A mixed method, which contains the pre and post surveys, semi-structured interviews, and micro-teaching assignments decoding, is used to boost the internal validity of the research design. An ANCOVA analysis was conducted through controlling different co-variances. The results suggest that after the treatment there is no statistically significant difference in teacher candidates' post-treatment belief of comprehensible input. This result is aligned with the patterns that were generalized from semi-structured interviews: 1) a lack of changes in the teacher candidates' belief of comprehensible input after receiving feedback, 2) an alignment between the teacher candidates' micro-teaching performances and their belief of comprehensible input, and (3) the teacher candidates' positive perceptions of the video feedback.
Smart Healthcare Apps for Quality Cancer Patient Support
Authors: Kouroubali Angelina , Koumakis Lefteris , Kondylakis Haridimos , Katehakis Dimitrios G.
Published: April 2020

This paper analyzes the clinical and technological characteristics of cancer mobile apps that enable patients to securely record, manage, and share their information. It proposes an integrated approach towards developing quality mobile health apps for cancer and discusses issues relevant to the enhancement of patient experience and acceptance, adherence to treatment, and effective support of coordinated care. Regulation, standardization, and interoperability together with the existence of useful, accurate, and reliable tools for active patient engagement are important aids towards efficient cancer disease management. Improving quality of life and well-being, in a secure and safe manner that respects the patients' privacy, seems to be a key challenge, together with the exploitation of the outcomes of recent research projects, relevant to end user digital engagement towards an integrated approach for the introduction of trustworthy, interoperable, usable, adaptable, and quality mobile health apps.
Applicability of BIM in Heritage Buildings
Authors: Al-Sakkaf Abobakr , Ahmed Reem
Published: April 2020

Over the past four decades, building modeling has taken numerous forms utilizing available technologies and software. Building information modeling (BIM) has significantly developed with the continuous advancements in the information technology and hardware industries. The evolution of BIM has attracted many researchers to explore its possible applications in modeling buildings and facilities with a humanitarian heritage value. However, researches have not been limited to that, as they later expanded to test the applicability of BIM in progressing the fields of maintenance and rehabilitation, operation and management, and even checking the durability of such buildings against varying circumstances and usability as well. As a result of a deep literature review, this research is developed to provide a critique of the previous studies conducted on the fields of heritage building information modeling (HBIM), the relevant software and equipment used in those studies, as well as case studies and applications used to demonstrate HBIM capabilities. Also, two case studies of Qasr Al Farid and Al-Bugiry buildings in KSA were implemented in this research to demonstrate the capabilities of HBIM in preserving the heritage value of historic buildings and monuments and to provide possible means of archiving the heritage value of those buildings utilizing state-of-the-art technologies. This study is expected to aid governments and decision makers of heritage buildings in understanding the positive impacts of including the HBIM in their management and operational processes, and will also act as a beneficial guiding tool for academic researchers to identify the gaps and limitations in previous studies to work towards overcoming them.
The Relevance of Teamwork in Software Startups
Authors: Almeida Fernando
Published: April 2020

Software startups have a major role in the market challenging existing models and enabling the emergence of new technologies with high economic and social impact. This study aimed to explore this phenomenon by characterizing the processes and challenges that are placed in the software startups related to the workgroup in the entrepreneurial teams and in the context of their business activities. The study uses a qualitative approach through the realization of three case studies with Portuguese startups software. The study uses a qualitative approach through the realization of three case studies with startups software. The main results have demonstrated the high importance of human capital in these organizations that is leveraged through teamwork in teams formally established for this purpose, but above all, it is important to highlight the role that informal communication assumes in the growth process of these startups.
Avatar-Based Learning and Teaching as a Concept of New Perspectives in Online Education in Post-Soviet Union Countries
Authors: Mkrttchian Vardan , Kharicheva Dina , Aleshina Ekaterina , Panasenko Svetlana , Vertakova Yulia , Gamidullaeva Leyla Ayvarovna , Ivanov Mikhail , Chernyshenko Vsevolod
Published: April 2020

In the article the avatar-based learning and teaching (A-BL&T) as a concept of control and managing knowledge in modern socio-economic conditions is proposed to use for assessment a university's economic efficiency. It is shown that all elements, methods and techniques (tools) do not operate in isolation, but rather are interrelated, complementing each other. All of them are used in the process of management and, in a combination, are powerful tools for increasing efficiency of management. Based on the example of avatar-based learning and teaching in Russian universities as modern educational environments, a conceptual model, methodology, and methods have been obtained for the automation of planning and calculation of the academic load in the university.
Investigation of Phosphorus In-Diffusion and Strain in GaAsP/GaAs Using High-Resolution Transmission Electron Microscopy
Authors: Chang Wonjae
Published: April 2020

We report our experiments based on the interfaces of a 5-period superlattice, containing GaAsP(3Å)/GaAs (190Å) heterostructures grown by molecular beam epitaxy (MBE). The atomic arrangement at the interfaces of GaAsP/GaAs is investigated using high resolution transmission electron microscopy (HRTEM). Our results indicate that the superlattice was grown coherently with strained layers. We propose that the atomic arrangement at the interface is GaP, assuming that phosphorus incorporation occurs primarily via substitution due to desorption of arsenic at the surface for substrate temperatures above 500°C. The incorporation of phosphorus has been investigated using fast Fourier transform (FFT) patterns and shows a form of strain distribution near the heterointerface. The FFT patterns of the superlattice reveal that strain distributes mostly near the interface and gradually decreases along the direction of growth. Phosphorus diffused into a GaAs layer changes the lattice constant in the growth direction, which reduces strain in the superlattice.
Kinetic Study on Crude Laccase of Marasmius sp. from Solid State Fermentation
Authors: Risdianto Hendro , Sugesty Susi
Published: April 2020

Crude laccase was produced by using the fermentation method of solid state fermentation and employed fungus Marasmius sp and rice straw as support media. The kinetics of laccase was investigated by using the substrate of 2,2’-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS). Laccase exhibits the maximum activity (Vm) of 1.45 mM/min and Michaelis-Menten (Km) constant value of 4.11 mM. The effect of pH and temperature has also been evaluated. The results showed that this enzyme had an optimum pH of 4.6 and temperature of 60 °C. Decreased stability of laccases is found to be faster when stored at room temperature than cold temperatures.
Host Range of Stem and Bulb Rot Parasite Nematode (Ditylenchus dipsaci)
Authors: Musyarofah Alfianida , Indarti Siwi
Published: April 2020

The aim of this research was to determine the host status of various species of plants and wild plants against Ditylenchus dipsaci. The research was carried out by conducting a survey and collecting sample at Central Java garlic centers situated in Magelang, Temanggung, Brebes, and Tegal. The host range of this nematode was diagnosed using a root painting method called the Byrd method. Nematodes in the root tissue were observed and calculated using compound microscope at 100x magnification and their images were captured using an optilab. The results showed that Allium sativum, A. cepa, A. porrum, Brassica oleracea var. botrytis, B. oleracea var. italica, B. chinensis var. parachinensis, Lactuca sativa, Zea mays, Capsicum frutescens, Apium graveolens, Cucumis sativus, Solanum tuberosum, Daucus carota are positively the hosts of D. dipsaci. Whereas B.oleracea var. capitata, Ipomea batatas, Colocasia esculenta are not the host of D. dipsaci. D. dipsaci also attacked to weed of Ageratum conyzoides. Grangea maderaspatana, Eleusine indica,Synedrella nodiflora are not the host of D. dipsaci. Lumbu Putih, Sangga Sembalun, and Lumbu Kuning varieties are good hosts for D. dipsaci. Tawangmangu Baru is a variety that is not suited for D.dipsaci.
Bioplastic Composite of Carboxymethyl Cellulose/N-P-K Fertilizer
Authors: Kartini Indriana , Lumbantobing Elisabeth Tiolina , Suyanta Suyanta , Sutarno Sutarno , Adnan Rohana
Published: April 2020

Bioplastic composites of carboxymethyl cellulose (CMC) and N-P-K fertilizer have been prepared at various amount of N-P-K. The bioplastics were prepared by solvent casting the sol precursors containing 10 to 50% (wt.%) commercial N-P-K fertilizer powder in petri dishes. Characterization was done by using infrared spectrophotometer to access the functional groups, XRD to evaluate the crystalline phase, and universal testing machine to determine the mechanical properties. The nitrogen and phosphorus contents were determined by UV-Vis spectrophotometer, while the potassium content was determined by using atomic absorption spectrometer. The results show that the bioplastic composites of CMC/N-P-K fertilizer can be prepared up to 40% (wt.%) of N-P-K powder without losing its plasticity. The mechanical properties of the resulted bioplastic composites decrease at high content of N-P-K powder, with the highest at 25 wt.%. The uptake of nitrogen and phosphorous was not affected by the amount of the N-P-K powders precursor, but the potassium was. Various possible interactions between N-P-K powder and CMC matrix allow the resulting composite to function as a controlled release of N-P-K fertilizer.
DNA Barcoding and Phylogenetic Analysis Sugarcane (Saccharum officinarum L.) Based on matK ( maturase K) Gene
Authors: Aristya Ganies Riza , Putri Fauzana , Kasiamdari Rina Sri , Musthofa Arni
Published: April 2020

Sugarcane (Saccharum officinarum L.) is an agricultural commodities with a great extent of diversity and high economic value. In Indonesia, the great extent of diversity of sugarcane is evidenced by a large number of cultivars cultivated. Sugarcane diversities at the molecular level can be seen using DNA barcodes, one of which is the matK. The purpose of the study was to identify and characterize matK and reconstruct the phylogenetic tree to determine the phylogeny of 24 sugarcane cultivars Indonesia. matK was amplified using the PCR method with matK F-5’ATGATTAATTAAGAGTAAGAGGAT-3’ and matK R-5’AATGCAAAAATTCGAAGGGT-3. Results showed that the matK gene was successfully amplified as many as 1531 bp. The sequencing process was done to determine the nucleotide sequence and compared with those of the GenBank database. It showed that the samples used had a similarity of 98.87%-99.44% to that of matK in Saccharum officinarum, Saccharum hybrid cultivar and Saccharum spontaneum. Reconstruction of the phylogenetic tree showed that the samples used were located in the same clade with a zero genetic distance, while all the references from NCBI were also located in the same clade. The analysis of genetic variation indicated that it had no haplotype value.
Micronization of Hydrothermally Extracted Phytochemical Compounds from Gracilaria Sp Using Electrospraying
Authors: Setyorini Dwi , Machmudah Siti , Winardi Sugeng , wahyudiono wahyudiono , goto motonobu
Published: April 2020

The hydrothermal extraction was carried out in a semi-batch extractor at a temperature of 160°C, a pressure of 7 MPa, and a water flowrate of 1 mL/min. Electrospraying was conducted at various voltages of 12, 14, and 16 kV, various distances between tip and collector of 6, 8 and 10 cm, precursor solution flow rate of 0.05 mL/h, and PVP concentrations of 6 and 8%, Particles obtained from electrospraying process were analyzed by SEM, FTIR, and spectrophotometer. The antioxidant efficiency (AE) of the particles was also examined. Based on the results, the morphology of particles was spherical with diameter less than 3 µm. The highest value of AE was 0.1058 min-1 that indicated that Gracilaria sp extract in the particles produced by electrospraying has good antioxidant activity. In the FTIR analysis, carrageenan and flavonoids were contained in the particles. The result indicated that hydrothermal extraction followed by electrospraying process could be one alternative process for obtaining the best phytochemical particles.
Study on Microwave Hydrodiffusion Gravity Extraction of the Vegetable Oil from Calophyllum inophyllum L Seed
Authors: Qadariyah Lailatul , Mahfud Mahfud , Muchammad Raka Selaksa Charsima
Published: April 2020

This article is about extracting the oil from Calophyllum inophyllum L using microwave hydrodiffusion gravity method (MHG). It mainly studies the effect of material size, microwave time, and microwave power on the extraction yield. The experiment shows that the factors which influence the extraction rate are microwave time, microwave power, and material size. The maximum condition for extraction oil using MHG method is 800 W in 20 minutes and the material size is 2 cm to give oil in 0.575% yield.
Kinetics Study Using Solvent-Free Microwave Extraction of Essential Oil from Allium sativum L.
Authors: Variyana Yeni , Mahfud Mahfud
Published: April 2020

Extraction of Allium sativum L. using Solvent-Free Microwave Extraction (SFME) without the addition of solvents in the process has been carried out. SFME is an alternative technique and method to produce essential oil and it has several advantages in terms of product quality. In this study, the essential oil was extracted from Allium sativum used extraction time from 10 to 90 min and microwave power in the range of 300-600 W. The result showed that SFME could produce the highest yield of 0.2636 g oil/100 g fresh garlic at 450 W and 90 min. In addition, the kinetic study of SFME model appears to be the best fit to explain with second-order than first-order model. It was proved by a good correlation between the experimental data and model achieved (R2>0.99) and (RMSE=0.0021). Based on the results obtained, second-order kinetic models could actually describe the kinetics model of extraction process from Allium sativum L. using SFME.
Utilization of Flavonoid Compounds as HER2 Tyrosine Kinase Inhibitor in Breast Cancer Using Fragment-Based Drug Design
Authors: Fleming Vincent Jonathan , Saragih Mutiara , Tambunan Usman Sumo Friend
Published: April 2020

Breast cancer has become one of the leading cause of women’s death around the world. Breast cancer can be caused by genetic or environmental factors. Human epidermal growth factor receptor 2 (HER2) is one of the main causes of breast cancer. The HER2 tyrosine kinase plays a significant role in the dimerization reaction which causes auto-phosphorylation of tyrosine residues in the cytoplasmic domain that triggers growth of the cancer cells. Inhibition of HER2 protein activity can be a potential alternative for breast cancer treatment. Flavonoids have become an important scaffold in medicinal chemistry due to its bioactivity and availability. Therefore, flavonoids were used as the database on this in silico research. Fragment-based drug design was applied to determine novel drug candidates. Three potential candidates were obtained in this research. VC-962 was selected as the best inhibitor candidates for HER2 tyrosine kinase.
Discovery of Novel α-Amylase Inhibitors as Type Two Diabetes Mellitus Therapy through Fragment-Based Drug Design
Authors: Hidayat Muhammad Fauzi , Ningsih Eka Gunarti , Alkaff Ahmad Husein , Tambunan Usman Sumo Friend
Published: April 2020

Diabetes is one of the top causes of death in the world, with 425 million sufferers reported in 2017. About 90% of diabetics suffer from Type 2 Diabetes Mellitus (T2DM). Recent studies show that inhibiting the α-amylase enzyme can significantly decrease the postprandial blood glucose levels through blocking carbohydrate hydrolysis. Therefore, it can be a promising strategy for T2DM treatment. This research was aimed to find the new potential inhibitor for the α-amylase from lead-like compounds Molecular Operating Environment (MOE) database through fragment-based drug design, combining with structure-based pharmacophore design method to obtain new drug candidate for T2DM. There were 653,214 lead-like compounds which were obtained from MOE database and screened based on the Astex Rules of Three along with toxicity filter to gain lead-like fragments. The filtered fragments were docked into the binding site of the α-amylase utilizing MOE 2014.09 software. Potential lead-like fragments were grown to generate 25,600 new ligands by utilizing DataWarrior v5.0.0 software, based on the Lipinski’s Rule of Five and toxicity filter. Molecular docking simu-lation and pharmacological test was performed on the ligand libraries to acquire the best ligand, namely BGOJI which were chosen according to the lowest ΔG binding score, RMSD value < 2, good molecular interaction, ADME/T test result.
One Step Synthesis of Symmetrical Amino Azine Derivatives Using Hydrazine Hydrate as a Reagent
Authors: Hidayah Nurul , Purwono Bambang , Pranowo Harno Dwi
Published: April 2020

Symmetrical Amino Azine derivative compound of 6,6'-((1E,1'E)-hydrazine-1,2-diylidenebis (methanyl-ylidene)) bis (3,4-dimethoxyaniline) TM has been synthesized through an unusual reaction route employed benzylidine derivative with some electron withdrawing groups as intermediate compounds. The targeted TM compound was prepared by one pot reaction of the intermediate 2-(4,5-dimethoxy-2-nitrobenzylidene) malononitrile 3 or (E)-1,2-dimethoxy-4-nitro-5-(2-nitrovinyl)-benzene 4 or nitrohydrazone 5 with excess 80% hydrazine hydrate and 10% Pd/C catalyst. However, direct synthesis to produce TM using nitro aryl aldehyde derivatives with 80% hydrazine hydrate and 10% Pd/C catalyst failed to obtain the target compound of TM.
Low and High-Frequency Electro-Hydrodynamic Patterns in Nematic Liquid Crystal Aligned Using Dual Layer Alignment Produced by Nanofiber
Authors: Dinan Aghnia , mahendra bhisma , Yusuf Yusril
Published: April 2020

The optical properties and electro-hydrodynamics (EHD) patterns of 4-methoxybenzylidene-4-butylaniline (MBBA) which is parallel oriented by nanofibers has been observed. The alignment of the liquid crystals was made using polyvinyl alcohol (PVA) nanofiber by used modified electrospinning. Electrospinning method was modified using two commercial copper (Cu) printed circuit board (PCB) as a gap collector. These planar samples area is 20 mm x 25 mm. The optical characteristic of these samples was studied by using an optical polarizing microscope. The optical intensity changes by a rotation of crossed polarizers are observed. When an electric field was applied to these samples, the electrohydrodynamic (EHD) pattern was observed. At the low till high frequency, by increasing the voltage, the patterns were formed such as Williams domain (WD), fluctuating Williams domain (FWD), grid patterns (GP) and dynamic scattering Mode (DSM).
Numerical Study of the Fermi Surface Evolution in Cuprates Using the One-Band Hubbard Model
Authors: Aminullah Lanang Maulana , Santoso Iman
Published: April 2020

A Numerical calculation of the Fermi Surface (FS) evolution in cuprate using the one-band Hubbard model by the matrix diagonalization method has been done. This work focusses on the study of the evolution of the FS in the cuprate material, namely , numerically by introducing a specific order parameter in the Hubbard model matrix. In this study, we confirm two evolution types of the FS of as an experimental result. Firstly, the evolution of the antibonding FS topology from the electron-like to the hole-like is generated by the order parameter that has a form of where is the order parameter coefficient that corresponds to the hopping parameter of the atomic neighbor long-range interaction and is the normalized momenta coordinate of the first Brillouin zone. On the contrary, the order parameter that has a form of generates the evolution of the FS from the hole-like topology to the electron-like topology. Secondly, the anisotropic evolution of the FS can be described by an extended d-wave order parameter which generating either the V-shape or U-shape type of the energy gap.
Porous Concrete as Non-Sand Concrete with Silica Fume Substitution for the Application of Sound Absorbing Materials in Buildings
Authors: Kurniawan Agus , Permana Arief Ramadhan
Published: April 2020

Sound-absorbing acoustic materials are usually made of special materials which are sometimes expensive and prone to fire and do not have sufficient strength. This research offers materials that have sufficient properties for the above problems, namely by using porous concrete. This study aims to calculate the absorption values of porous concrete values. Porous concrete is concrete which does not use sand to forms a void in concrete that also might be used as a sound absorbent. The concrete then is substituted with silica fume to reach more compressive strength. The value of absorption was measured by the impedance method of two microphones. The sample was put in a tube with a diameter of 10 cm and a height of 5 cm. The proportion of samples using American NRMCA. Tests were carried out in the frequency range of 0-1600 Hz. The best sample is a sample with a 25% void ratio that could absorb sound over a long frequency range of 432-1600 Hz even though it only reaches class B. While the highest value of absorption coefficients was the sample with a void ratio of 20% which reach a value of 0.99997. The highest stiffness was achieved by 5% void concrete with a value of k= 5.8×106.
Ni0.5V0.5Fe2O4  Nanophotocatalyst: Preparation, Characterization and its Activity on Remazol Golden Yellow Degradation under Sunlight Irradiation
Authors: Situmeang Rudy , Romiyati Romiyati , Saputra Ahmad Ammar , Sembiring Simon
Published: April 2020

Photocatalysis is a promising solution for the degradation of dyes since this substance give a negative impact on the environment. In this study, Ni0.5V0.5Fe2O4 nanophotocatalyst was prepared simultaneously using sol-gel and freeze-drying methods. After the freeze-drying process, the sample was subjected to calcination treatment and subsequently characterized using the techniques of X-ray Diffraction (XRD) and Scherrer calculation method, FTIR, DR spectroscopy, and TEM analysis. The results of XRD characterization indicated that material consists of Ni0.5V0.5Fe2O4 spinel as a major crystalline phase. Then, TEM analysis proved that the grain size of this spinel is in the range of 20 nm. Crystallite size calculation using Scherrer equation proved that the size is 34.06 nm, DRS analysis indicated that bandgap energy of spinel Ni0.5V0.5Fe2O4 is suitably utilized and FTIR spectra analysis implied that the prominent acid sites are Lewis acid. Furthermore, results of dyes photodegradation indicated that Ni0.5V0.5Fe2O4 nanocatalyst is active for remazol golden yellow degradation until 45% conversion under sunlight irradiation for 100 min.
Effect of Carbonate Hydroxyapatite (CHA) on the Properties of Pectin Edible Films
Authors: Dalimunthe Nisaul Fadilah , Kusumastuti Yuni , Wirawan Sang Kompiang
Published: April 2020

Pectin is a derivative polysaccharides biopolymer that can be used as a material for an edible film. In this study, pectin edible film was made from a thin layer of edible pectin. The physical properties of the edible films such as elongation of the break, tensile strength, and the swelling degree were observed when carbonate hydroxyapatite (CHA) was added to the pectin edible film. In order to study the loading and release behavior of the pectin edible film, cinnamaldehyde (2 wt%) was also added to the film used as a drug sample. Cinnamaldehyde is known as a derivative compound of cinnamon bark. The edible film was made by mixing pectin (0.015 g/mL) and carbonate hydroxyapatite (CHA). Various concentration of carbonate hydroxyapatite (1, 3, 5, 7 wt%) was diluted in water and stirred using tween 80 and glycerol for about 1.5 h at a temperature of 70 °C. Then, cinnamaldehyde was added to the mixture and stirred for 30 minutes. The mixture was dried in an oven at a temperature of 50 °C for 15 h and stored in the desiccator. The experiment results showed that the tensile strength of pectin edible film was increased when more concentration of CHA added to the film, but the elongation of break and swelling were decreased. These results indicate that the addition of carbonate hydroxyapatite (CHA) affects the properties of pectin edible film significantly but does not affect the thickness of the film.
Genome-Wide DNA Methylation and RNA Analysis Reveal Potential Mechanism of Resistance toStreptococcus agalactiaein GIFT Strain of Nile Tilapia (Oreochromis niloticus)
Authors: Hu Qiaomu , Ao Qiuwei , Tan Yun , Gan Xi , Luo Yongju , Zhu Jiajie
Published: April 2020

Streptococcus agalactiae is an important pathogenic bacterium causing great economic loss in Nile tilapia (Oreochromis niloticus) culture. Resistant and susceptible groups sharing the same genome showed significantly different resistance to S. agalactiae in the genetically improved farmed tilapia strain of Nile tilapia. The resistance mechanism is unclear. We determined genome-wide DNA methylation profiles in spleen of resistant and susceptible O. niloticus at 5 h postinfection with S. agalactiae using whole-genome bisulfite sequencing. The methylation status was higher in the spleen samples from resistant fish than in the susceptible group. A total of 10,177 differentially methylated regions were identified in the two groups, including 3725 differentially methylated genes (DMGs) (3129 hyper-DMGs and 596 hypo-DMGs). The RNA sequencing showed 2374 differentially expressed genes (DEGs), including 1483 upregulated and 891 downregulated. Integrated analysis showed 337 overlapping DEGs and DMGs and 82 overlapping DEGs and differentially methylated region promoters. By integrating promoter DNA methylation with gene expression, we revealed four immune-related genes (Arnt2, Nhr38, Pcdh10, and Ccdc158) as key factors in epigenetic mechanisms contributing to pathogen resistance. Our study provided systematic methylome maps to explore the epigenetic mechanism and reveal the methylation loci of pathogen resistance and identified methylation-regulated genes that are potentially involved in defense against pathogens.
The safety of dimetridazole alone and in conjunction with oxytetracycline in Hereford crossbred steers
Authors: Swan G. E. , Shakespeare A. , Mülders Maria S.G. , Minnaar P. P. , Naudé T. W. , Groeneveld H. T.
Published: April 2020

Dimetridazole was given intraruminally alone, and in conjunction with oxytetracycline to healthy, 10-11 month-old Hereford cross-bred steers (n = 6). Intraruminal treatment with dimetridazole was given through a fistula at 75 mg kg-1 daily for 5 d, while the oxytetracycline was injected intramuscularly at 10 mg kg-1 on Days 1 and 3 of the dimetridazole treatment. The animals were observed at various intervals throughout the trial period for adverse reactions, including effects on ruminal activity and motility, changes in live-mass, venous acid-base balance, haematology and ruminal and serum ammonia concentrations. Dimetridazole, either when used alone or in conjunction with oxytetracycline, had a marked effect on ruminal function. Within 6 h of dosing, the ruminal pH fell to below 5, but then returned to pretreatment values over the next 24-48 h. This was followed by the eradication of the ruminal protozoal population in all animals tested and an increase in the methylene blue reduction time to more than 6 min. Ruminal motility remained unaffected throughout this period. During the week of treatment, the mean live-mass of the animals dropped by 20 ± 9,9 kg in the dimetridazole treated group and by 13,3 ± 2,8 kg in the animals treated with both dimetridazole and oxytetracycline. A mild to severe watery diarrhoea, which continued for 1 to 2 d, occurred in 4 animals after the first dimetridazole treatment. A compensated metabolic acidosis and an increase in haematocrit were observed. An initial transient rapid rise in rumen ammonia concentrations did not result in a concurrent rise in serum ammonia concentrations. Except for one animal, all the others recovered without intervention by the end of the trial period. However, in the one exception, it was necessary to administer fresh rumen content to re-establish ruminal activity. No significant differences were observed between the 2 treatment groups for any of the observations made.
Hereditary laminitis in Jersey calves in Zimbabwe
Authors: Hoyer M. J.
Published: April 2020

The clinical signs and radiological findings of a rare laminitis-like condition in Jersey calves (n = 6) are described. Regular hoof-trimming proved very beneficial. Pedigree studies of the affected calves strongly suggest a recessive autosomal inheritance.
Molluscum contagiosum in a horse
Authors: Van Rensburg I. B.J. , Collett M. G. , Ronen N. , Gerdes Truuske
Published: April 2020

An adult stallion presented with a severe papular dermatitis of especially the neck, chest and genitalia. A marked scrotal oedema was present. Histopathological examination of skin biopsies, revealed the presence of numerous intracytoplasmic molluscum bodies in areas of focal epidermal hyperplasia. Electron microscopical examination showed the presence of typical pox virions in affected epidermal cells. Attempts at viral isolation were unsuccessful. This is believed to be the first reported case of molluscum contagiosum in a horse in the Republic of South Africa.
Chylothorax in a kitten
Authors: Duncan N. M.
Published: April 2020

Chylothorax with collapse of the lungs was found on postmortem examination of a 2-week-old Siamese kitten. The chylothorax was probably due to a lack of continuity of the thoracic duct.
Professor J.M.W. le Roux 1926-1991
Authors: Smuts Malie M.S.
Published: April 2020

No abstract available.
The efficacy of ultrasonic pest controllers for fleas and ticks
Authors: Brown C. R. , Lewis B. D.
Published: April 2020

Two ultrasonic pest controllers, a pet-collar unit and a large unit for household use, were tested for their efficacy in repelling fleas and ticks in a choice chamber. Neither unit had any affect on the distribution of fleas or ticks in the choice chamber up to 24 h exposure, and activity of fleas, ticks and cockroaches was unimpaired. The study extends and supports previous findings that ultrasound is ineffective as a means of controlling common pests of households and pets.
Lack of antibodies to coronaviruses in a captive cheetah (Acinonyx jubatus) population
Authors: Spencer Jennifer A.
Published: April 2020

Cheetahs (Acinonyx jubatus) (n=40) were tested by means of an immunofluorescent test (IFT) for the presence of antibodies to the feline coronavirus group.  All cheetahs tested negatively and this was further confirmed by virus serum neutralisation.
The cellular prion protein beyond prion diseases
Authors: Manni Giorgia , Lewis Victoria , Senesi Matteo , Spagnolli Giovanni , Fallarino Francesca , Collins Steven J. , Mouillet-Richard Sophie , Biasini Emiliano
Published: April 2020

The cellular prion protein (PrPC), a cell surface glycoprotein originally identified for its central role in prion diseases (also called transmissible spongiform encephalopathies), has recently been implicated in the pathogenesis of other neurodegenerative disorders, such as Alzheimer’s and Parkinson’s diseases, by acting as a toxicity-transducing receptor for different misfolded protein isoforms, or in some case by exerting neuroprotective effects. Interestingly, PrPC has also been reported to play unexpected functions outside the nervous system, for example by contributing to myelin homeostasis, regulating specific processes of the immune system and participating in various aspects of cancer progression. Collectively, these observations point to a much broader role for PrPC in physiological and disease processes than originally assumed. In this manuscript, we provide an overview of what is known about the role of PrPC beyond prion disorders and discuss the potential implications of targeting this protein in different diseases.
Modelado matemático de ingestas de alimento e infusión de insulina en un paciente con diabetes tipo 1 en lazo cerrado
Authors: Manrique-Córdoba J. , Romero-Ante J. D. , Vivas A. , Vicente J.M. , Sabater-Navarro J. M.
Published: April 2020

La diabetes tipo 1 es una afección en la cual el páncreas pierde su capacidad de producir suficiente insulina, incrementando significativamente la concentración de glucosa en la sangre. En el presente trabajo se presenta el diseño de un modelo matemático de las dinámicas glucosa-insulina de un paciente con diabetes tipo 1, el cual contempla el aporte a la concentración de glucosa en la sangre por parte de la ingesta de carbohidratos, grasas y proteínas. El modelo incluye las dinámicas de absorción de 5 tipos de insulina, diferentes métodos de administración de la misma, y la variación de la sensibilidad a la insulina durante el día. Se integró el modelo a un algoritmo de regulación de insulina en lazo cerrado, con el fin de evaluar el desempeño del modelo y la eficacia de los tratamientos en lazo cerrado, en comparación con las terapias en lazo abierto. Los resultados muestran la respuesta del modelo ante distintas situaciones de un paciente real, y pruebas de funcionamiento del controlador.
Observador de alta ganancia con zona muerta ajustable para estimar la saturación de agua líquida en pilas de combustible tipo PEM
Authors: Cecilia A. , Costa-Castelló R.
Published: April 2020

En el campo de las pilas de combustible PEM, la gestión de agua líquida es una de las problemáticas más importantes que afectan a la eficiencia y vida útil del sistema. Las técnicas de control activo y supervisión del agua se ven limitadas por la ausencia de sensores que puedan medir la saturación de agua líquida en línea. Por eso, en este trabajo se presenta el diseño de un observador de estado para la estimación de la saturación de agua líquida en la capa catalizadora del cátodo de una pila de combustible PEM de cátodo abierto. El observador propuesto se basa en técnicas de alta ganancia. Además, se modifica con una función de zona muerta autoajustable con el fin de reducir su sensibilidad al ruido en la medida. Los resultados se han validado mediante simulación numérica y experimentación. Estos muestran que, en ausencia de ruido, el observador propuesto presenta unas prestaciones similares a las de su equivalente sin zona muerta. Además, en presencia de ruido, la zona muerta disminuye significativamente el error de estimación inducido por este.
El efecto de la diversidad de género sobre el rendimiento de las sociedades cooperativas agroalimentarias españolas
Authors: Hernández Ortiz María Jesús , García Martí Elia , Martínez Jiménez Rocío , Pedrosa Ortega Cristina , Ruiz Jiménez Carmen
Published: April 2020

La diversidad de género en los consejos de administración tiene el potencial de agregar valor a las organizaciones que la promueven. Bajo la premisa de teorías como la de la agencia, la de dependencia de recursos o la de los stakeholders, han sido diversos los estudios que han analizado la relación existente entre el número de mujeres en los consejos y los resultados económicos y financieros de las empresas. No obstante, la revisión de estos trabajos nos permite obtener dos conclusiones claras: la primera, que los resultados no son concluyentes, puesto que se han encontrado relaciones positivas, negativas y no significativas entre ambas variables. Y la segunda, que la mayoría de estos estudios se han realizado sobre grandes empresas que cotizan en Bolsa, fundamentalmente Sociedades Anónimas y Sociedades Limitadas. De este modo, este trabajo trata de contribuir a la literatura ya existente sobre este tema analizando la diversidad de género de los Consejos Rectores de las sociedades cooperativas españolas y su influencia en los resultados de rentabilidad. En concreto, se han analizado 1171 sociedades cooperativas del sector agroalimentario en España, utilizando para ello técnicas estadísticas de regresión. Los resultados muestran que existen diferencias significativas en función del tipo de Consejo, clasificándolos según el grado de paridad de cada uno, y las medidas de rentabilidad ROE y ROA. Además, en el caso del ROA también se observa una relación positiva y significativa entre el porcentaje de mujeres en el consejo y esta variable de rentabilidad.