bluuebunny/crossref_metadata_2025 huggingface dataset:
Khotbah Perumpamaan : Suatu Penilaian terhadap Metode Khotbah Perumpamaan David Buttrick
Authors: Solihin Benny
Published: September 2019

Perumpamaan mungkin, oleh kebanyakan pengkhotbah, dianggap sebagai genre Alkitab yang paling mudah dikhotbahkan. Namun bagi pengkhotbah-pengkhotbah yang serius mengkhotbahkan perumpamaan acap kali membingungkan. Sebab meskipun nampak sederhana, perumpamaan mengandung beberapa persoalan yang rumit. Persoalan-persoalan tersebut meliputi: (1) dari sudut manakah berita sebuah perumpamaan harus diambil? Dari sudut para pendengar pertama yang mendengar langsung ketika Yesus menceritakan perumpamaan-perumpaman-Nya atau dari perspektif para pembaca pertama Injil? (2) Dapatkah penafsiran alegori digunakan dalam khotbah perumpamaan? (3) Apakah bentuk atau model khotbah yang paling baik untuk mengkhotbahkan perumpamaan? Bentuk deduktif atau induktif? Satu poin, tiga poin, banyak poin, atau model khotbah narasi? Persoalanpersoalan di atas membuat banyak ketidakpastian dalam diri para pengkhotbah. Thomas G. Long menyimpulkannya dengan tepat, “Seorang pengkhotbah pemula mengkhotbahkan sebuah perumpamaan dengan keyakinan yang tinggi, melangkahkan kakinya dengan berani seolah berjalan pada suatu daerah yang sudah ia kenal. . . . Tetapi semakin kita mengenal perumpamaan, semakin kurang yakin apakah kita sungguh-sungguh memahaminya.” Ada banyak solusi yang ditawarkan oleh para ahli berkenaan dengan metode khotbah perumpamaan dan salah satunya adalah dari David Buttrick, seorang dosen homiletika dan liturgi dari Divinity School, Vanderbilt University. Di dalam bukunya, Speaking Parables: A Homiletic Guide, ia menawarkan model khotbah narasi untuk mengkhotbahkan perumpamaan. Tawaran ini sangat menarik dan bermanfaat, namun demikian ada beberapa dari pandangannya yang perlu dicermati secara kritis. Dalam tulisan ini penulis akan memaparkan dan mengevaluasi metode Buttrick tersebut. Tetapi sebelumnya, akan dibahas tentang definisi perumpamaan, kemudian menelusuri sejarah khotbah perumpamaan, dan model-model khotbah perumpamaan yang pada umumnya digunakan dalam sejarah sejak masa Bapa-bapa gereja mula-mula sampai kini. Ketiga hal itu akan menjadi dasar pijakan dalam menilai metode khotbah perumpamaan yang ditawarkan olehnya.
Abstrak Tesis
Authors: Veritas Editor
Published: September 2019

Abstrak Tesis
Two New HATNet Hot Jupiters around A Stars and the First Glimpse at the Occurrence Rate of Hot Jupiters from TESS∗
Authors: Zhou G. , Huang C. X. , Bakos G. Á. , Hartman J. D. , Latham David W. , Quinn S. N. , Collins K. A. , Winn J. N. , Wong I. , Kovács G. , Csubry Z. , Bhatti W. , Penev K. , Bieryla A. , Esquerdo G. A. , Berlind P. , Calkins M. L. , Val-Borro M. de , Noyes R. W. , Lázár J. , Papp I. , Sári P. , Kovács T. , Buchhave Lars A. , Szklenar T. , Béky B. , Johnson M. C. , Cochran W. D. , Kniazev A. Y. , Stassun K. G. , Fulton B. J. , Shporer A. , Espinoza N. , Bayliss D. , Everett M. , Howell S. B. , Hellier C. , Anderson D. R. , Cameron A. Collier , West R. G. , Brown D. J. A. , Schanche N. , Barkaoui K. , Pozuelos F. , Gillon M. , Jehin E. , Benkhaldoun Z. , Daassou A. , Ricker G. , Vanderspek R. , Seager S. , Jenkins J. M. , Lissauer Jack J. , Armstrong J. D. , Collins K. I. , Gan T. , Hart R. , Horne K. , Kielkopf J. F. , Nielsen L. D. , Nishiumi T. , Narita N. , Palle E. , Relles H. M. , Sefako R. , Tan T. G. , Davies M. , Goeke Robert F. , Guerrero N. , Haworth K. , Villanueva S.
Published: September 2019

Wide-field surveys for transiting planets are well suited to searching diverse stellar populations, enabling a better understanding of the link between the properties of planets and their parent stars. We report the discovery of HAT-P-69 b (TOI 625.01) and HAT-P-70 b (TOI 624.01), two new hot Jupiters around A stars from the Hungarian-made Automated Telescope Network (HATNet) survey that have also been observed by the Transiting Exoplanet Survey Satellite. HAT-P-69 b has a mass of

M
Jup and a radius of

R
Jup and resides in a prograde 4.79 day orbit. HAT-P-70 b has a radius of

R
Jup and a mass constraint of

M
Jup and resides in a retrograde 2.74 day orbit. We use the confirmation of these planets around relatively massive stars as an opportunity to explore the occurrence rate of hot Jupiters as a function of stellar mass. We define a sample of 47,126 main-sequence stars brighter than T
mag = 10 that yields 31 giant planet candidates, including 18 confirmed planets, 3 candidates, and 10 false positives. We find a net hot Jupiter occurrence rate of 0.41 ± 0.10% within this sample, consistent with the rate measured by Kepler for FGK stars. When divided into stellar mass bins, we find the occurrence rate to be 0.71 ± 0.31% for G stars, 0.43 ± 0.15% for F stars, and 0.26 ± 0.11% for A stars. Thus, at this point, we cannot discern any statistically significant trend in the occurrence of hot Jupiters with stellar mass.
Determining the Transport of Magnetic Helicity and Free Energy in the Sun’s Atmosphere
Authors: Schuck Peter W. , Antiochos Spiro K.
Published: September 2019

The most important factors determining solar coronal activity are believed to be the availability of magnetic free energy and the constraint of magnetic helicity conservation. Direct measurements of the helicity and magnetic free energy in the coronal volume are difficult, but their values may be estimated from measurements of the helicity and free energy transport rates through the photosphere. We examine these transport rates for a topologically open system such as the corona, in which the magnetic fields have a nonzero normal component at the boundaries, and derive a new formula for the helicity transport rate at the boundaries. In addition, we derive new expressions for helicity transport due to flux emergence/submergence versus photospheric horizontal motions. The key feature of our formulas is that they are manifestly gauge invariant. Our results are somewhat counterintuitive in that only the lamellar electric field produced by the surface potential transports helicity across boundaries, and the solenoidal electric field produced by a surface stream function does not contribute to the helicity transport. We discuss the physical interpretation of this result. Furthermore, we derive an expression for the free energy transport rate and show that a necessary condition for free energy transport across a boundary is the presence of a closed magnetic field at the surface, indicating that there are current systems within the volume. We discuss the implications of these results for using photospheric vector magnetic and velocity field measurements to derive the solar coronal helicity and magnetic free energy, which can then be used to constrain and drive models for coronal activity.
The ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: Evolution of the Molecular Gas in CO-selected Galaxies
Authors: Aravena Manuel , Decarli Roberto , Gónzalez-López Jorge , Boogaard Leindert , Walter Fabian , Carilli Chris , Popping Gergö , Weiss Axel , Assef Roberto J. , Bacon Roland , Bauer Franz Erik , Bertoldi Frank , Bouwens Richard , Contini Thierry , Cortes Paulo C. , Cox Pierre , da Cunha Elisabete , Daddi Emanuele , Díaz-Santos Tanio , Elbaz David , Hodge Jacqueline , Inami Hanae , Ivison Rob , Fèvre Olivier Le , Magnelli Benjamin , Oesch Pascal , Riechers Dominik , Smail Ian , Somerville Rachel S. , Swinbank A. M. , Uzgil Bade , van der Werf Paul , Wagg Jeff , Wisotzki Lutz
Published: September 2019

We analyze the interstellar medium properties of a sample of 16 bright CO line emitting galaxies identified in the ALMA Spectroscopic Survey in the Hubble Ultra Deep Field (ASPECS) Large Program. This CO−selected galaxy sample is complemented by two additional CO line emitters in the UDF that are identified based on their Multi-Unit Spectroscopic Explorer (MUSE) optical spectroscopic redshifts. The ASPECS CO−selected galaxies cover a larger range of star formation rates (SFRs) and stellar masses compared to literature CO emitting galaxies at z > 1 for which scaling relations have been established previously. Most of ASPECS CO-selected galaxies follow these established relations in terms of gas depletion timescales and gas fractions as a function of redshift, as well as the SFR–stellar mass relation (“galaxy main sequence”). However, we find that ∼30% of the galaxies (5 out of 16) are offset from the galaxy main sequence at their respective redshift, with ∼12% (2 out of 16) falling below this relationship. Some CO-rich galaxies exhibit low SFRs, and yet show substantial molecular gas reservoirs, yielding long gas depletion timescales. Capitalizing on the well-defined cosmic volume probed by our observations, we measure the contribution of galaxies above, below, and on the galaxy main sequence to the total cosmic molecular gas density at different lookback times. We conclude that main-sequence galaxies are the largest contributors to the molecular gas density at any redshift probed by our observations (z ∼ 1−3). The respective contribution by starburst galaxies above the main sequence decreases from z ∼ 2.5 to z ∼ 1, whereas we find tentative evidence for an increased contribution to the cosmic molecular gas density from the passive galaxies below the main sequence.
The Thermal Force in Astrophysical Plasmas: Current Free Coulomb Friction
Authors: Scudder J. D.
Published: September 2019

The t
hermal force (TF) is an exchange force mediated by Coulomb collisions between electrons and ions in a heat-conducting astrophysical plasma, is one of three, non-inertial, balancing terms in the parallel component of the generalized Ohm’s law, and is magnetic field aligned with a size that scales with and is parallel to the dimensionless heat flux. The TF (i) increases the size of E
∥ above that implied by the electron pressure divergence; (ii) deepens the electrostatic trap for electrons about the Sun; (iii) strengthens the electron kurtosis and skewness, further levitating ions out of their gravitational well, (iv) constrains the heat flow in a plasma where parallel currents are preempted; and (v) is shown to be directly measurable using the full electron velocity distribution function above and below thermal energies. (vi) The usually ignored TF modifies all species internal energy equations; it enhances the rate of conduction cooling by the electrons, increases the ion entropy, and forestalls adiabatic behavior. Using estimates at 1 au this effect is especially strong in the higher speed wind U > 400 km s−1 regime. (vii) On rather general grounds any physical heat transport is accompanied by an underlying TF; in almost all known cases of modeling astrophysical plasmas this dependence is ignored or demonstrably incorrect. It follows that attempts to predict species specific pressures without inclusion of the TF is futile.
Treatment of Hepatitis C in Two Paediatric Patients using Sofosbuvir during Haematopoietic Stem Cell Transplantation
Authors: Grasso Antonio G , Sonzogni Aurelio , Zanon Davide , Maestro Alessandra , Loiacono Stefano , Maximova Natalia
Published: September 2019

We report the first two paediatric cases of sofosbuvir treatment during high-intensity myeloablative conditioning and engraftment phases of haematopoietic stem cell transplantation. These reports highlight the safety of sofosbuvir during all phases of transplantation and the lack of interaction between sofosbuvir and alkylating or immunosuppressive agents.
Chalcidoid fauna (Hymenoptera: Chalcidoidea) of grasslands situated in rapeseed (Brassica napus L.) surroundings in Bulgaria
Authors: Todorov Ivaylo , Boyadzhiev Peter , Teofilova Teodora , Elshishka Milka , Peneva Vlada
Published: September 2019

The objective of the current study was to assess the potential of semi-natural grasslands to serve as parasitoid sources from which individuals can spread to the surrounding cultivated habitats. The composition of chalcidoid fauna was studied in nine non-harvested grasslands located near to but not bordering oilseed rape (Brassica napus L.) fields. The investigated areas were generally used as pastures for domestic animals, but vegetation was not intensively grazed in all sampling sites. Samples were collected by sweep-netting during the period between full flowering and the end of flowering of the rapeseed (stages 65-70 according to the BBCH-scale). Insect counts showed significant dominance of Eulophidae Westwood (84 individuals; 42%) and Pteromalidae Dalman (60 ind.; 30%), with lower abundance of Eurytomidae Walker (22 ind.; 11%). Some other groups were poorly represented – Torymidae Walker (10 ind.; 5%), Encyrtidae Walker (9 ind.; 5%), Ormyridae Förster (6 ind.; 3%), Eupelmidae Walker (4 ind.; 2%), Chalcididae Latreille (2 ind.; 1%) and Tetracampidae Förster (2 ind.; 1%). Most numerous among eulophids were Baryscapus Förster (38 ind.; 46%), Aprostocetus Westwood (21 ind.; 25%) and Necremnus Thomson (11 ind.; 13%). Nine other genera comprised the remaining 23% of the eulophid collection – Diglyphus Walker, Elachertus Spinola, Entedon Dalman, Eulophus Geoffroy, Neochrysocharis Kurdjumov, Neotrichoporoides Girault, Pnigalio Schrank, Sympiesis Förster and Tetrastichus Haliday. The most abundant pteromalids were Mesopolobus Westwood (20 ind.; 37%) and Pteromalus Swederus (11 ind.; 20%), followed by 13 genera with 7% or less – Catolaccus Thomson, Chlorocytus Graham, Cyrtogaster Walker, Cyclogastrella Bukovskii, Gastrancystrus Westwood, Glyphognathus Graham, Halticoptera Spinola, Homoporus Thomson, Norbanus Walker, Psilocera Walker, Trichomalus Thomson, Spalangia Latreille and Systasis Walker. Parasitoid diversity and its possible beneficial role were discussed according to the present knowledge on the rapeseed pests and their natural enemies.
Conservation of the populations of Centaurea immanuelis-loewii (Asteraceae) in NATURA 2000 in Bulgaria
Authors: Bancheva Svetlana
Published: September 2019

Centaurea immanuelis-loewii Degen is a perennial herbaceous plant species of the Asteraceae family, a Balkan endemic protected by the Bulgarian Biodiversity Act. The species is found in few places in northern Greece and southwestern Bulgaria and has been identified as important for conservation by the European Community. For this reason, a significant part of its populations is included in the European ecological network NATURA 2000. In Bulgaria the species is found in 3 floristic regions – Znepolski region (Konyavska Mt., Golo Bardo Mt.), Struma Valley (Boboshevski Gorge, Ruen Mt., Sandanski, Kresna, Oshtava villages) and Pirin (Vlahi village), at 100–900 m. This study aims to determine the current status of the populations of the species in Bulgaria covered by NATURA 2000. The main threats to the species have also been identified. Centaurea immanuelis-loewii inhabits stony and scree sites and enters into the composition of the open xerothermic grass communities. It has been established in five Sites of Community Importance (SCIs) in Bulgaria. The population of SCI ‘Ostritsa’ is the largest in number. It covers an area of about 35 ha and numbers several thousand individuals. In the SCI ‘Konyavska Planina’ the occupied area is also relatively large - about 33 ha, but only about 300 individuals are found there. In the other three sites the populations are very small: 0.0066 ha in the SCI ‘Skrino’, 3.37 ha in the SCI ‘Kresna-Ilindentsi’ and 2.09 ha in the SCI ‘Middle Pirin-Alibotush’, with numbers ranging between 100–600 individuals. The main threats are: the decrease of the occupied area due to the construction of a highway (Golo Bаrdo Mt.), the extraction of inert materials (Konyavska Mt.), erosion, the low reproductive and migratory potential of the species, the specific habitat to which it is attached. For the conservation of the species and its habitats the following measures are proposed: targeted scientific research for the accumulation of data on the species' reproductive capacity and its effective support, in situ and ex situ conservation and restoration of the populations, restoration and maintenance measures for the habitat of the species, and achievement of greater effectiveness of legal measures.
Distribution and taxonomy of the Grey voles (Mammalia, Rodentia, subgenus Microtus) in Bulgaria
Authors: Nedyalkov Nedko , Koleva Vanya , Raykov Ivaylo
Published: September 2019

Grey voles (subgenus Microtus), widespread in Eurasia, may be important pests and could cause serious damage to agricultural grain fields. In Bulgaria two morphologically similar species are present (Microtus arvalis Pallas, 1778 and M. rossiaemeridionalis Ognev 1924), which are impossible to identify in the field. Despite their importance as pests, very little is known about their current status and distribution. Here we cotributed new data - based on karyological examination of 27 individuals of voles. We summarized all available information on the distribution of the voles – 20 published and 11 unpublished locations. Both species co-occurred together in north Bulgaria; in Thrace and the SE only M. rossiaemeridionalis is distributed. Microtus rossiaemeridionalis seems to occupy lower elevations, while in the mountain areas (above 1000 m) only M. arvalis is found, which corresponds well with the data from neighboring countries. The taxonomy of both species in Bulgaria is discussed.
« Cancer Alley » ou la décompression du paysage pétrochimique. La collaboration de Richard Misrach et de Kate Orff
Authors: Duperrex Matthieu
Published: September 2019

Cet article est consacré à la collaboration entre le photographe Richard Misrach et la paysagiste Kate Orff, qui a donné lieu à plusieurs expositions ainsi qu’au livre Petrochemical America (2012). L’originalité de ce travail consiste en la mobilisation des outils de la description paysagère pour, à partir de la « scène » initiale de la photographie, produire une sorte de rétro-ingénierie de la fabrique industrielle du paysage. En retour, les effets de représentation et d’instanciation de la photographie s’en trouvent amplifiés au travers d’une généalogie singulière du paysage altéré.
Un Observatoire photographique participatif des paysages et de la valeur universelle de la Chaîne des Puys-faille de Limagne ?
Authors: Enjelvin Pierre , Planchat Claire , Cassani Fanny , Heydel Pierre-Alain , Fournioux Danielle
Published: September 2019

En réponse à une commande d’outil d’observation et d’évaluation pour la gestion des paysages de la Chaîne des Puys-faille de Limagne dans le cadre de la candidature puis de l’inscription au patrimoine mondial de l’UNESCO, l’outil photographique a été proposé. Cet article présente la démarche de mise en œuvre de l’observatoire des dynamiques paysagères commanditée par le conseil départemental du Puy-de-Dôme. Fondée sur une méthodologie participative d’observatoire photographique des paysages, la démarche combine d’autres dispositifs techniques dans le but d’aller vers une sensibilisation des acteurs, élus et habitants du territoire inscrit, aux paysages et à leurs multiples dimensions. Nous supposons que l’implication de ceux-ci tout au long de la démarche, notamment pour transmettre la méthode de reconduction photographique (photographies réitérées à travers le temps) pourra favoriser leur appropriation de l’observatoire et assurer sa pérennité au travers d’actions de gestion et d’autres procédures d’aménagements.
L’Émergence de l’esthétique photographique par Viollet-le-Duc et Ruskin
Authors: François Arnaud
Published: September 2019

L'article vise à déployer le champ de recherche sur la structuration de l'expérience sensible par les « images énergétiques » à partir du cas particulier de l'action de la photographie sur l'esthétique architecturale de la deuxième moitié du XIXe siècle. Dans une visée quasi archéologique, il prend comme étude de cas les œuvres de Viollet-le-Duc et de Ruskin. L'hypothèse est que la photographie a inconsciemment agi sur leur sens de la perception et de l'imagination au point de renouveler l'art de l'architecture à partir de cette nouvelle esthétique. On y retrouve l'éloge de la matière et de la vie antérieure que la photographie représente en image. Cette poétique est, de plus, intégrée à une structure de la perception correspondant à la photographie : 1/ la fragmentation de l'espace, 2/ l'incarnation du point de vue par la chambre noire, 3/ la condition urbaine de la vision de l'édifice, 4/ l'homogénéité des détails et du grain photographique. L'article se conclut par l'évocation du rejet de l'esthétique photographique du XIXe par Frank Lloyd Wright et Le Corbusier, au nom de la révélation d'une nouvelle vision, inconsciemment structurée, cette fois, par le cinéma.
Study on Unbalanced Competitive Adsorption of Two Ginsenosides by Molecularly Imprinted Polymers
Authors: Zhang Wei , Ma Yun Jie , Li Qian , Wang Shao Yan
Published: September 2019

In this study, a kind of homogeneous spherical molecularly imprinted polymers (MIPs) with high specific surface area was prepared, with ginsenoside Re (Re) as template molecule, methacrylic acid (MAA) as functional monomers, ethylglycol dimethacrylate (EGDMA) as crosslinker and poly (vinyl alcohol)-1788 (PVA-1788) as dispersant. The MIPs was characterized by field emission scanning electron microscopy (FESEM) and surface porosity detector, and competitive adsorption behavior of the MIPs was evaluated under different two-component adsorption conditions. The experimental results showed that MIPs had the regular mesopores structure, equilibrium adsorption isotherms of MIPs were in good agreement with Freundlich model under different adsorption conditions (single solute adsorption (SSA), simultaneously competitive adsorption (SCA) and preloaded competitive adsorption (PCA)). The concentration of template (Re) and competitors (Rg1) affect the results of competitive adsorption. Re has obvious priority in competitive adsorption, and this unbalanced competitive adsorption was the results of spatial selectivity and strong inter-molecule forces of MIPs toward Re. The analysis of competitive adsorption of molecularly imprinted materials is helpful to further study the recognition mechanism of molecularly imprinted adsorbent.
Design of Extrusion Die Geometry for Making Sheets from a Mixture of Metal Powder and Polymer
Authors: Doifode Devanand S. , Date Prashant P. , Alexandrov Sergei
Published: September 2019

Rheology of polymer-metal powder mixture containing a significant amount of metal powder loading determines its flowability through an extrusion die. To make sheets from such mixtures, geometries based on Coat-hanger, Fishtail and ‘T’ type designs are often used. Flow properties such as flow rate, viscosity, residence time, instantaneous velocity and pressure distribution in different type of dies have been used in simulations in Ansys (CFX or fluent). The present paper describes the special design of the fishtail type die geometry with adjustable part at lip land to make sheets from a polymer-metal powder mixture by extrusion. This also includes the design of primary manifold, tapered pre-land, secondary manifold and lip land geometries to obtain uniform velocity at the exit of the die and as uniform a pressure distribution as possible. It includes designing of suitable die profiles in each of these four zones based on the experimentally established constitutive equations using a Melt Flow Index tester.
Effect of Gold Nano Dots in Microwave Brazing: A Novel Approach to Join Ti6Al4V to MACOR®
Authors: Tamang Siddharth , Kumar Nitish , Aravindan S.
Published: September 2019

Nano structured surface generation is useful in inducing specific functionalities to the surface. This work attempts on generation of such surface through thermal dewetting. Enhanced adhesion behavior of such surface is utilized for joining MACOR® ceramic to Ti6Al4V alloy. Ti6Al4V alloy is brazed with MACOR® by microwave energy using TiCuSil as a braze alloy. MACOR® ceramic is subjected to pre-treatment called gold dewetting. For comparison plain ceramic is also used for joining. The reaction zone formed on joining Ti6Al4V to gold dewetted MACOR® is more uniform than the untreated MACOR® ceramic interface. Energy Dispersive Spectroscopy (EDS) analysis of the reaction zone suggests the formation of Ti2Cu and Ti3Au intermetallic compounds. The shear strength of the pre-treated samples is observed to be higher than that of plain joints.
Polyvinyl Alcohol Hydrogel Reinforcement of Cellulose and Silica Nanoparticles for Wound Healing Application
Authors: Carating Christian Albert M. , Rosales Ruth Naomi M. , Bongao Harveen C. , Magdaluyo Jr. Eduardo R.
Published: September 2019

Hydrogels are smart materials that have the capability to absorb water by over five hundred times their own weight and showed various applications in biomedical field, including drug delivery systems, tissue engineering and wound healing. In this study, the fabrication of polyvinyl alcohol hydrogels reinforced with cellulose and silica nanoparticles was investigated for possible use in wound healing applications. Synthesis was done through chemical cross-linking of polyvinyl alcohol and sodium borate. Results showed that mechanical properties and thermal stability of the reinforced hydrogels were improved compared to the neat hydrogel. The nanosilica-reinforced hydrogels showed antimicrobial activity and improved degree of swelling compared to the neat PVA hydrogels. Sparse growth was observed in the antimicrobial assay with Pseudomonas aeruginosa and Staphylococcus aureus. Cellulose-reinforced hydrogels showed minimal flexibility characteristic compared to the nanosilica-reinforced hydrogel samples. Moreover, it showed no antimicrobial activity against Pseudomonas aerigunosa.
The Influence of Un-DRXed Grains on Mechanical Properties of Mg-Zn-Mn-La-Ce Alloys
Authors: Zhao Da Zhi , Hu Ke , Le Qi Chi
Published: September 2019

The effect of extrusion temperature on the mechanical properties of low-Zn containing wrought Mg alloys manufactured by indirect extrusion was studied. The experiments were performed on Mg-Zn-Mn based alloy with addition of LaMM (La rich misch metal). The alloys presented typical bimodal grain structure consisted of large elongated un-DRXed grains and fine recrystallized grains when extruded at relatively low temperature. The alloy showed excellent balance of strength and elongation. The distinct grain structure generated in this study allowed the influence of un-DRXed grains on yield strength to be investigated.
Comparison of Predicted Forming Limit Curves with Measured Experimental Data on Hot-Dip Zinc-Coated Cold-Rolled Steel by Incremental Forming Process
Authors: Kesvarakul Ramil , Limpadapun Khompee
Published: September 2019

Single Point Incremental Forming (SPIF) is a die-less forming process with advantages of high-flexibility, low-cost and short lead time. The high local strains that are applied to the metal sheet, often exceeding the conventional formability limit. This paper is focused on comparison of predicted forming limit curves with measured experimental data on Hot-Dip Zinc-Coated Cold-Rolled sheet, with 0.20 mm thick is studied in single point incremental forming. Truncated square pyramid and cone are formed to study the formability of blank sheets at room temperature. It was found that both Formulation of plastic instability criteria and Keeler’s formula gives the lowest FLC. FLDs have predicted failures in forming process consistently with the real experiments. The experimentally obtained cracking limit differ from analytical one and empirical one by about 3.398 and 2.135 true strain respectively at FLD0, the corresponding plane strain values.
The Effect of Sintering Aid on Fabrication of Three-Dimensional Carbonated Hydroxyapatite Porous Scaffolds
Authors: Mohd Noor Muhammad Syazwan , Mohd Noor Ahmad Fauzi , Baba Ismail Yanny Marliana
Published: September 2019

Three-dimensional (3D) carbonated hydroxyapatite (CHA) porous scaffolds were successfully fabricated via polyurethane (PU) replication technique. Two sets of porous CHA scaffolds were prepared using: 1) as-synthesized CHA slurry (SCHA) and (2) as-synthesized CHA slurry with the addition of sintering aid, magnesium hydroxide (SCHA+Mg (OH)2). The aim of this study was to investigate the influences of the addition of sintering aid in the fabrication of porous CHA scaffolds in terms of phase purity, crystallinity, architecture, and mechanical properties. Result suggested that both of the fabricated porous scaffolds remained as single phase B-type CHA and free of secondary phases. Interestingly, the use of Mg (OH)2 as sintering aid led to better internal architecture resulted in smoother surface and less micro-cracks/pores formation on the struts since the struts was found to be more densified as compared to SCHA scaffolds. In terms of mechanical properties, SCHA+ Mg (OH)2 scaffolds showed higher compressive strength, indicating that the use of Mg (OH)2 had successfully reduced the sintering temperature and improve the densification of porous scaffolds. Thus, SCHA+ Mg (OH)2 scaffolds was found to be a better choice of scaffold with respect to its handling, compaction strength and architecture with improve strut properties.
Structure and Properties of Detonation Coatings Based on Titanium Carbosilicide
Authors: Buitkenov D.B. , Rakhadilov B.K. , Tuyakbaev B.T. , Sagdoldina Zh.B. , Kenesbekov A.B.
Published: September 2019

Как известно ранее, карбиды, силициды и карбосилициды металлов обладают уникальным сочетанием высокой твердости, коррозионной стойкости и износостойкости [1]. Однако получение таких фаз традиционными методами связано с высокой температурой и продолжительностью их синтеза. В то же время технология получения защитных покрытий из таких композиций ограничена. Газотермические методы (электрическая дуга, газовое пламя, плазма, детонация и т. Д.) Являются одними из наиболее широко используемых [2–5]. Во всех газотермических методах при нанесении материалов покрытия на подложку используются высокотемпературные газовые потоки, в которых частицы материала нагреваются и приобретают высокую скорость. Образование покрытия происходит, когда эти частицы взаимодействуют с подлежащим покрытию субстратом. Важным преимуществом газотермических методов покрытия является то, что они позволяют наносить различные материалы покрытия (металлы и их сплавы, оксиды, бориды, карбиды и т. Д.). Анализ классических газотермических методов нанесения покрытий показывает, что наиболее высокие прочностные свойства обеспечивают детонационные покрытия [6]
Feasibility Study on the Application of Fabricated Multipurpose Food Packaging Plastic (MFPP) Liner as Alternative Landfill Liner Material in Sustainable Landfill Infrastructure Model
Authors: Bashar Nur Azwa Muhamad , Alias Salina , Chay Tay Chia , Isa Nurhanem Syarhida , Rahman Nur Raihan Sofiyah
Published: September 2019

Multipurpose Food Packaging Plastic (MFPP) is one of the largest residential and commercial solid waste all over the world. BWP is categorized under Non-Biodegradable Plastic Waste (N-BPW). Due to its inability to degrade, this abundance of N-BPW caused space decrement in landfill. Many methods have been proposed for recycling of N-BPW such as incorporating N-BPW into road construction and added material in concrete production. In the present study, the feasibility of using MFPP as landfill liner material is studied through a series of laboratory testing in terms of mechanical and chemical characteristics. The liner sample was prepared in terms of a fabricated layer (combination of 60 layers (Sample A) and 80 layers (Sample B) of a single plastic). The fabricated layers were prepared by applying hot-pressing technique to increase the strength of the surface attachment between each of the layers. The prepared fabricated MFPP liners were tested for Ultimate Tensile Strength Test (UTS), Scanning Electron Microscopy (SEM) and X-Ray Distraction (XRD). The tested samples were then compared with the Conventional Geomembranes (GMs). Obtained results indicated that proposed fabricated MFPP Liner had 70% similar characteristics to GMs. In addition, the fabricated MFPP Liners have an ability to sustain maximum loading higher than Conventional GMs. These desirable characteristics indicated that the fabricated MFPP Liners has potential to be used as landfill liner material.
Effects of Mixed Halide Ions Incorporation on CH3NH3Pb(I,Br)3-x(SCN)x Perovskite Films via Solution Deposition Route
Authors: Loryuenyong Vorrada , Kulchartchai Peeranut , Audomcharoensak Phatsawat , Jeyakom Penpaka , Buasri Achanai
Published: September 2019

Nowadays, a novel solar cell based on an organolead halide perovskite structure, CH3NH3PbX3 (X is a halogen), has been gained a great attraction due to its promising photovoltaic performance. However, their humidity limitation is a serious drawback, which limits practical application of perovskite-based solar cells. In this study, we investigated the improvement of humidity stability and the influence of halide radicals (I- and Br-) on optical and physical properties of thiocyanic-modified CH3NH3PbX3 or CH3NH3PbX3-x(SCN)x films, prepared by two-step deposition method. The mixtures of CH3NH3I and CH3NH3Br solution with different molar ratios were prepared to control the I-:Br- ratios in perovskite films. The characterization of perovskite films was tested by XRD, UV-Vis spectrophotometer, UV-Vis DRS spectroscopy, FE-SEM, and moisture stability testing under constant relative humidity. The results showed that different molar ratios of I- and Br- could strongly affect the properties of perovskite films. The larger amount of Br- promoted the complete reaction of perovskite, larger energy band gap, and higher moisture stability. However, the prepared films were likely to exhibit phase separation due to the formation of iodide-rich and bromide-rich domains.
Numerical Simulation of Single Junction InGaN Solar Cell by SCAPS
Authors: Moustafa Mohamed Orabi , Alzoubi Tariq
Published: September 2019

The performance of the InGaN single-junction thin film solar cells has been analyzed numerically employing the Solar Cell Capacitance Simulator (SCAPS-1D). The electrical properties and the photovoltaic performance of the InGaN solar cells were studied by changing the doping concentrations and the bandgap energy along with each layer, i.e. n-and p-InGaN layers. The results reveal an optimum efficiency of the InGaN solar cell of ~ 15.32 % at a band gap value of 1.32 eV. It has been observed that lowering the doping concentration NA leads to an improvement of the short circuit current density (Jsc) (34 mA/cm2 at NA of 1016 cm−3). This might be attributed to the increase of the carrier mobility and hence an enhancement in the minority carrier diffusion length leading to a better collection efficiency. Additionally, the results show that increasing the front layer thickness of the InGaN leads to an increase in the Jsc and to the conversion efficiency (η). This has been referred to the increase in the photogenerated current, as well as to the less surface recombination rate.
Effects of Antioxidants Particle Size on Oxidation Resistance of MgO-C Refractory
Authors: Zhao Shu Mao , Mei Guo Hui , Zhang Jiu
Published: September 2019

In this study, Si and SiC powder with a critical particle size ranged from 0.1 to 0.4mm was added into MgO-C refractory as antioxidants. At 1200°C in air atmosphere, oxidation weight losses of cylindrical specimens with additives were measured and the effective diffusion coefficient of oxygen in refractories was calculated from the results. Thus, the effects of antioxidants particle size on the oxidation resistance were researched. The result shows that the particle size of antioxidant has a considerable influence on oxidation resistance of material. The oxidation resistance of MgO-C refractories increased at first as the critical particle size of Si powder increased from 0.1 to 0.2mm and then decreased as the critical particle size increased up to 0.4mm, while the oxidation resistance of MgO-C refractories decreased as the critical particle size of SiC additives increased from 0.1 to 0.4mm. The minimum effective diffusion coefficients of oxygen in MgO-C refractories added by Si and SiC were 10.90 and 14.09cm2/min, individually.
Recycled HDPE/PET Clay Nanocomposites
Authors: Rigail-Cedeño Andres F. , Diaz-Barrios Antonio , Gallardo-Bastidas Juan , Ullaguari-Loor Stefania , Morales-Fuentes Nicolás
Published: September 2019

Recycling waste plastics will support the preservation of natural resources and energy consumption. New challenges arise for the development of products that take advantage of solid waste. Upgrading recycled plastics using nanotechnology can tailor and consequently improve plastic properties for industrial applications. This research aims to process and relate the morphology and thermo-mechanical properties of recycled high-density polyethylene (rHDPE) and recycled polyethylene terephthalate (rPET) clay nanocomposites. Blends of rHDPE (75 wt %) coming from packaging and rPET (25 wt %) from bottles were mixed with two organoclays (Cloisite 20A and Cloisite 30B) (3 wt %) and a compatibilizer agent based on ethylene-glycidyl methacrylate (EGMA) (5 wt %). The recycled plastics nanocomposites were processed using a single-screw extruder incorporating a dispersive and distributive mixer and an injection molding machine. Several techniques were used to characterize the dispersion, morphology, mechanical properties and compatibilization of these composite blends. The reinforcing effect of rPET in the continuous rHDPE phase depended on the organoclay type and the compatibilizer additive. Both organoclays increased the stiffness and strength of rHDPE and rPET as evidenced by an increase in the corresponding Young modulus and ultimate tensile strength. EGMA increased the compatibility in the recycle plastics blend and in the clays nanocomposites as evidenced in elongation and energy at break results. On the other side, Cloisite 20A showed to be more compatible with EGMA than Cloisite 30B in these rHDPE/rPET blends based on the thermo-mechanical properties results.
CD24hiCD38hi and CD24hiCD27+ Human Regulatory B Cells Display Common and Distinct Functional Characteristics
Authors: Hasan Md Mahmudul , Thompson-Snipes LuAnn , Klintmalm Goran , Demetris Anthony J. , O'Leary Jacqueline , Oh SangKon , Joo HyeMee
Published: September 2019

Although IL-10–producing regulatory B cells (Bregs) play important roles in immune regulation, their surface phenotypes and functional characteristics have not been fully investigated. In this study, we report that the frequency of IL-10–producing Bregs in human peripheral blood, spleens, and tonsils is similar, but they display heterogenous surface phenotypes. Nonetheless, CD24hiCD38hi transitional B cells (TBs) and CD24hiCD27+ B cells (human equivalent of murine B10 cells) are the major IL-10–producing B cells. They both suppress CD4+ T cell proliferation as well as IFN-γ/IL-17 expression. However, CD24hiCD27+ B cells were more efficient than TBs at suppressing CD4+ T cell proliferation and IFN-γ/IL-17 expression, whereas they both coexpress IL-10 and TNF-α. TGF-β1 and granzyme B expression were also enriched within CD24hiCD27+ B cells, when compared with TBs. Additionally, CD24hiCD27+ B cells expressed increased levels of surface integrins (CD11a, CD11b, α1, α4, and β1) and CD39 (an ecto-ATPase), suggesting that the in vivo mechanisms of action of the two Breg subsets are not the same. Lastly, we also report that liver allograft recipients with plasma cell hepatitis had significant decreases of both Breg subsets.
Identification of an Increased Alveolar Macrophage Subpopulation in Old Mice That Displays Unique Inflammatory Characteristics and Is Permissive to Mycobacterium tuberculosis Infection
Authors: Lafuse William P. , Rajaram Murugesan V. S. , Wu Qian , Moliva Juan I. , Torrelles Jordi B. , Turner Joanne , Schlesinger Larry S.
Published: September 2019

The elderly population is more susceptible to pulmonary infections, including tuberculosis. In this article, we characterize the impact of aging on the phenotype of mouse alveolar macrophages (AMs) and their response to Mycobacterium tuberculosis. Uninfected AMs were isolated from bronchoalveolar lavage of young (3 mo) and old (18 mo) C57BL/6 mice. AMs from old mice expressed higher mRNA levels of CCL2, IFN-β, IL-10, IL-12p40, TNF-α, and MIF than young mice, and old mice contained higher levels of CCL2, IL-1β, IFN-β, and MIF in their alveolar lining fluid. We identified two distinct AM subpopulations, a major CD11c+ CD11b− population and a minor CD11c+ CD11b+ population; the latter was significantly increased in old mice (4-fold). Expression of CD206, TLR2, CD16/CD32, MHC class II, and CD86 was higher in CD11c+ CD11b+ AMs, and these cells expressed monocytic markers Ly6C, CX3CR1, and CD115, suggesting monocytic origin. Sorted CD11c+ CD11b+ AMs from old mice expressed higher mRNA levels of CCL2, IL-1β, and IL-6, whereas CD11c+ CD11b− AMs expressed higher mRNA levels of immune-regulatory cytokines IFN-β and IL-10. CD11c+ CD11b+ AMs phagocytosed significantly more M. tuberculosis, which expressed higher RNA levels of genes required for M. tuberculosis survival. Our studies identify two distinct AM populations in old mice: a resident population and an increased CD11c+ CD11b+ AM subpopulation expressing monocytic markers, a unique inflammatory signature, and enhanced M. tuberculosis phagocytosis and survival when compared with resident CD11c+ CD11b− AMs, which are more immune regulatory in nature.
Distributed Turbulence Model with Rigorous Spatial Cross-Correlation for Simulation of Helicopter Flight in Atmospheric Turbulence
Authors: Ji Honglei , Chen Renliang , Li Pan
Published: September 2019

This paper presents a distributed turbulence model with rigorous spatial cross-correlation for helicopter flight simulation in atmospheric turbulence and for future handling-quality analysis. First, digital filters with longitudinal correlations of the von Kármán turbulence
are developed to generate discrete turbulence velocity components. Meanwhile, transverse turbulence correlations are considered by relating the filters in different positions with mathematically rigorous spatial cross-correlation. Then, the distributions of the related filters on the transverse
plane in front of helicopter and their velocity components in the longitudinal direction of airspeed, as well as turbulence models of helicopter aerodynamic surfaces, are established. Finally, a flight dynamics model coupled with the turbulence model is developed and validated against the
flight-test data. The proposed model can achieve accurate real-time simulations of helicopter response to atmospheric turbulence in the frequency range of interest of handling qualities. The effect of transverse turbulence correlations on helicopter frequency response is also analyzed. The
results show that the simulation model regardless of transverse turbulence correlations would aggravate the "rotor-to-body attenuation" effect of the main rotor and therefore underpredict the helicopter roll, pitch, and heave rate responses to atmospheric turbulence in the frequency range
of interest.
29th National Congress of the Italian Association of Veterinary Food Hygienists (AIVI) | Bari, 11-13 September 2019
Authors: Tantillo Giuseppina , Giuffrida Alessandro , Guidi Alessandra , Manfreda Gerardo , Novelli Enrico
Published: September 2019

This abstract book contains the abstracts presented at the 28th National Congress of the Italian Association of Veterinary Food Hygienists (AIVI) | Bari, 11-13 September 2019
Winter decrease of zooplankton abundance and biomass in subalpine oligotrophic Lake Atnsjøen (SE Norway)
Authors: Jensen Thomas C.
Published: September 2019

Despite the rapidly changing winter conditions in temperate ecosystems, little attention has been devoted to the effects of these changes on lake ecology. Few studies on the seasonal changes in abundance and biomass of the major groups of the metazooplankton community (i.e. rotifers, cladocerans and copepods) in northern oligotrophic lakes include data from the ice-covered winter months. This study reports monthly variation in zooplankton abundance and biomass from June 2010 to October 2011, including winter, in an oligotrophic, subalpine lake in southeastern Norway (Lake Atnsjøen). Changes in rotifer, cladoceran, copepod, and total zooplankton abundances and biomass were related to seasonal variation in water temperature and phytoplankton biomass by means of ordination analysis. The zooplankton abundance and biomass were much lower in winter than during the open water season. However, an under-ice phytoplankton bloom occurred during the final winter months, when snow cover and ice thickness were reduced and (presumably) light penetration increased, leading to an increase in abundance of copepod nauplii. Winter zooplankton abundance was dominated by copepods and rotifers, while winter zooplankton biomass was dominated by copepods and cladocerans. Both phytoplankton and zooplankton had two biomass peaks in 2010 and one peak in 2011. Rotifers dominated zooplankton abundance with a peak in August and total zooplankton abundance followed a similar pattern. In contrast, cladocerans dominated zooplankton biomass with a peak in July and total zooplankton biomass also peaked at this time. Rotifer and total zooplankton abundance and rotifer biomass were most closely correlated to water temperature. However, cladoceran biomass and total biomass were most closely correlated with phytoplankton biomass, but also appeared to be dependent on other carbon sources. Estimates of non-phytoplankton particulate organic carbon indicated that this part of the carbon pool could be an additional food source for zooplankton particularly in early and mid-winter. The longer growing season in 2011 than in 2010, owing to earlier ice-off in 2011, may have contributed to higher phytoplankton and zooplankton biomass in 2011. With climate warming, this is an expected change in temperate lake ecosystems.
Organizing pneumonia secondary to cetuximab in a patient with colorectal cancer
Authors: AlGhulayqah Abdulaziz , AlShamsan Bader , Bazarbashi Shouki , Mohammed Shamayel , Mobeireek Abdullah
Published: September 2019

Organizing pneumonia (OP) may be idiopathic or secondary to a variety of causes including drugs. OP and other forms of pulmonary toxicity secondary to cetuximab, however, have been described rarely. It is paramount to recognize and differentiate OP from other common conditions that cancer patients are prone to such as infection and pulmonary embolism. A 69-year-old man with colorectal cancer received ten cycles of palliative chemotherapy [FOLFIRI (5-Fluorouracil, Leucovorin, Irinotecan) and cetuximab] with clinical and radiological response. He developed dyspnea following cycle 4, then 6 weeks later presented with cough, fever, tachypnea, hypoxia, bilateral crackles and diffuse pulmonary shadows. He was started on antibiotics but his condition deteriorated further. Cultures, including blood and bronchioalveolar lavage, grew no pathogens and molecular analysis and cytology for bacteria viruses were negative. Trans-bronchial biopsy was consistent with organizing pneumonia. Treatment with corticosteroids resulted in dramatic clinical and radiological resolution with normalization of gas exchange and pulmonary function. Corticosteroids were stopped and he was restarted on FOLFIRI and remained well with no relapse over a year of follow up. Although pulmonary toxicity secondary to cetuximab is uncommon, it is important to recognize, as it may be associated with poor prognosis. To the best of our knowledge, this is the first report of OP attributed to cetuximab with histopathological evidence.