Miracle-dz/UniFAR-FTUs huggingface dataset:
Precipitation Hardening Caused by a Difference in Shear Modulus between Particle and Matrix

The interaction force between a spherical precipitate, whose shear modulus differs from the one of the matrix, and a dislocation is calculated numerically. From the maximum and the range of this interaction force, the critical resolved shear stress τc is derived. If the total precipitated volume fraction stays constant and the particle radius rp is varied between 8 and 50 times the Burgers vector, τc increases monotonously with rp. This is in contrast to the findings published by other authors. Modulus hardening is weak compared with other mechanisms of precipitation strengthening. Die Wechselwirkungskraft zwischen einer kugelformigen Ausscheidung, die einen anderen Schubmodul als die Matrix hat, und einer Versetzung wird numerisch berechnet. Aus dem Maximum und der Reichweite dieser Kraft wird die kritische Schubspannung gewonnen. Diese wachst – bei konstant gehaltenem Volumenbruchteil der Partikel – monoton mit deren Radius, wenn dieser zwischen 8 und 50 Burgersvektoren liegt. Dieses Ergebnis steht in Widerspruch zu den Berechnungen anderer Autoren. Modulhartung ist im Vergleich zu anderen Mechanismen der Ausscheidungshartung schwach.
Climate Change and the Wine Industry: Current Research Themes and New Directions

Research on climate change and the wine industry has been characterized by several themes. Studies have addressed the impacts of climate change on wine quality, impacts of climate change and variability on grapevine yield and phenology, and vineyard site suitability analyses in the context of terroir. This paper reviews the state of knowledge on the implications of climate change for viticulture and viniculture and suggests the vulnerability approach as a direction for future research. This approach will increase understanding of the adaptive capacity of the wine sector, with the ultimate goal of reducing the vulnerability of the industry to climate change.
Facebook Kullanıcılarının Kişilik Özellikleri ile Facebook Kullanım Örüntülerinin İlişkisi: Bir Gözden Geçirme Çalışması

Son yillarda, Facebook sosyal paylasim sitesinin kullanimi oldukca yayginlasmistir. Bu gozden gecirme calismasinda, utangaclik, bencillik ve 5 Faktor kisilik yapisinin alt faktorleri olan disadonukluk, oz disiplin, uyumluluk, yenilige aciklik ve nevrotiklik kisilik ozellikleri ile Facebook kullanimi arasindaki iliskileri arastiran calismalarin sonuclarinin butuncul bir bakis acisi ile degerlendirilmesi amaclanmaktadir. Arastirma kapsaminda veri tabanlarinda ‘Facebook ve kisilik ozellikleri’, ‘Facebook kullanicilari’ gibi anahtar sozcukler kullanilarak taramalar gerceklestirilmistir. Bu taramalar sonucunda 2004-2014 (Mart) tarihleri arasindaki yayimlanmis olan 40 calismaya ulasilmis ve bu calismalar gozden gecirilmistir. Ilgili calismalarda Facebook kullanim oruntulerinin kullanicilarin kisilik ozelliklerine gore farklilastigi bulunmustur. Disadonukluk, utangaclik ve bencillik kisilik ozelligine sahip bireyler siteyi sik kullanirlarken, oz-disiplin sahibi bireyler daha az kullanmaktadirlar. Yenilige acik bireyler ile nevrotik bireylerin kullanim sikligi ise duruma gore farklilasmaktadir. Facebook’taki arkadas sayilari acisindan incelendiginde disadonukler ile bencil bireyler fazla arkadasa sahipken; utangac bireylerin arkadas sayilarinin az oldugu gorulmektedir. Facebook’taki paylasimlarda ise disadonuk, yenilige acik ve bencil bireyler fazlaca paylasim yaparlarken; oz-disiplinli, utangac ve uyumlu bireyler paylasim yapmaktan kacinmaktadirlar. Son olarak oz-disiplinli ve nevrotik bireyler mesajlasma servisini sik kullanirlarken, yenilige acik ile utangac bireyler mesajlasmayi tercih etmemektedirler. Bu calismada ayrica farkli kisilik ozelliklerine sahip bireylerin Facebook’u kullanim oruntuleri kullanicilarin ihtiyaclari ve amaclari baglaminda tartisilarak, Facebook’u kimlerin ne amacla ve nasil kullandiklarina iliskin butuncul yapi da ortaya konulmustur. Bu bulgular dikkate alindiginda, bireylerin ihtiyaclarini karsilayabilecekleri alanlarin gercek hayatta da olusturulabilecegi ve sosyal medyanin bu amaclara ulasmak icin daha islevsel sekilde duzenlenebilecegi ifade edilebilir.
Repetition in McDonald's Slogan

McDonald’s is one of the fast food companies which used stylistic devices as the language strategy. The stylistic devices implemented on the analysis is repetition. The purposes of the analysis on repetition in the McDonald’s advertising slogan are (1) to identify the type of the repetition and (2) to identify the language unit used in the slogan. This research implemented qualitative method; the method is used to qualify the slogans that consist of repetition. There are 10 data of McDonald’s repetition slogans. The results discover three different types of repetition and two language units used in the repetition of the slogan. The research concludes that repetition is used as a particular strategy in McDonald’s slogan in order not only to attract customer’s attention or convey the message but also to bear in their mind about the image of McDonald’s. McDonald’s is one of the fast food companies which used stylistic devices as the language strategy. The stylistic devices implemented on the analysis is repetition. The purposes of the analysis on repetition in the McDonald’s advertising slogan are (1) to identify the type of the repetition and (2) to identify the language unit used in the slogan. This research implemented qualitative method; the method is used to qualify the slogans that consist of repetition. There are 10 data of McDonald’s repetition slogans. The results discover three different types of repetition and two language units used in the repetition of the slogan. The research concludes that repetition is used as a particular strategy in McDonald’s slogan in order not only to attract customer’s attention or convey the message but also to bear in their mind about the image of McDonald’s.
The self-consistent-field approach to polyatomic vibrations

on the Born-Oppenheimer approximation which separates the motion of the electrons from that of the nuclei. The electronic motion produces an effective potential which holds molecules together and governs their vibrational motion. The complexity of this potential gives rise to the richness of much of chemistry. Thus, a theoretical picture of the vibrations of molecules is at the heart of many chemical questions. The traditional view of vibrational motion is based on an harmonic approximation to the full nuclear potential. This very simple approximation gives rise to
Mathematical Model for the Emulsion Polymerization Reaction Kinetics of Two Phase Latex Particles

Many of today's industrial applications of emulsion polymers require the creation of polymer particles with specifically designed structures. A fair amount of work has been done on predicting and controlling particle morphology, and it is recognized that the reaction kinetics often play an important role in determining that morphology. The present work describes a procedure to calculate the reaction rate for two‐phase latex particles by extending the classic Smith–Ewart concepts to the more complicated situation. The model involves a complete account of radical events in both polymeric phases. Eight rate parameters are necessary to completely describe the system. A particle population distribution is generated to reflect the probability of specific particles to have two distinct numbers of radicals in each phase. Simple statistics on this population allow the calculation of the average number of radicals for each polymeric phase. The model collapses to the correct answers when applied to single‐phase particles and results in the prediction of the number of radicals in each of the phases when applied to structured particles. Several examples are described for core–shell (or inverted core–shell) and hemispherical particles in which the polymer Tg, monomer concentration and radical entry rates are varied. In addition, the effects of radical transfer rates between the polymer phases are highlighted. Such effects are found to be important for some polymer systems and not so important for others. The model is readily extendible to occluded structures. Since the reaction kinetics are concluded to be significantly dependent upon the particle morphology, it is clear that morphology development and reaction kinetics are coupled processes and need to be treated simultaneously in order to produce an effective overall model for two‐phase emulsion polymers.
Synthesis, characterization, and in vitro release of ibuprofen from poly(MMA‐HEMA) copolymeric core–shell hydrogel microspheres for biomedical applications

This article describes the development of a new crosslinked poly(methyl methacrylate-2-hydroxyethyl methacrylate) copolymeric core–shell hydrogel microsphere incorporated with ibuprofen for potential applications in bone implants. Initially poly(methyl methacrylate) (PMMA) core microspheres were prepared by free-radical initiation technique. On these core microspheres, 2-hydroxyethyl methacrylate (HEMA) was polymerized by swelling PMMA microspheres with the HEMA monomer by using ascorbic acid and ammonium persulfate. Crosslinking monomers such as ethylene glycol dimethacrylate (EGDMA) has also been included along with HEMA for polymerization. By this technique, it was possible to obtain core–shell-type microspheres. The core is a hard PMMA microsphere having a hydrophilic poly(HEMA) shell coat on it. These microspheres are highly hydrophilic as compared to PMMA microspheres. The size of the hydrogel microspheres almost doubled when swollen in benzyl alcohol. These microspheres were characterized by various techniques such as optical microscopy, scanning electron microscopy, Fourier-transformed infrared spectroscopy, thermogravimetric analysis, and differential scanning calorimetry. The particle size of both microspheres was analyzed by using Malvern Master Sizer/E particle size analyzer. The in vitro release of ibuprofen from both microspheres showed near zero-order patterns. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 3045–3054, 2002; DOI 10.1002/app.10310
Research on career success of computer information technology research and development (R&D) personnel

To explore the influence mechanism of psychological capital on career success, a questionnaire survey was conducted among 288 research and development (R&D) personnel of computer information technology in China. The results showed that psychological capital, career commitment, person-organization fit, total score and each dimension of career success were significantly positively correlated with each other; psychological capital significantly positively predicts objective and subjective career success, and the predictive effect of both can be realized through the mediating role of career commitment; in the second half of the mediated path between psychological capital and subjective career success, career commitment is regulated by person-organization fit. Compared with individuals with a low level of person-organization fit, individuals with a high level of person-organization fit have a stronger mediating effect on the relationship between psychological capital and subjective career success.
Veronicosid, ein neues Iridoidglucosid aus Veronica officinalisL.(Scrophulariaceae)

Veronicoside, a new iridoid glucoside from Veronica officinalisL. (Scrophulariaceae) A new iridoid glucoside, Veronicoside (1) has been isolated from Veronica officinalisL. The structure of 1 has been determined by chromatographic and spectroscopic analysis as 6-benzoylcatalpol.
Histological Study on the Effects of Allogenic Bone Marrow Derived Mesenchymal Stem Cells Along with Local Insulin Therapy on Osteosynthesis in Gap Defects of Radius in Diabetic Rabbit Model

Background: Diabetes mellitus impairs fracture healing causing bone repair abnormality which is insulin dependent. Exogenous insulin can accelerate fracture healing in diabetes by promoting bone remodeling and bone formation. Mesenchymal stem cell loaded scaffolds having osteoinductive and osteoconductive properties, may be used as an alternative for autogenous bone grafting. The current study aimed to investigate the efficacy of cultured allogenic bone marrow derived mesenchymal stem cell implantation with insulin therapy for increasing osteosynthesis in bone gap defects in experimentally induced diabetic rabbits. Methods: Thirty six, New Zealand White rabbits were divided into four groups: A, B, C and D. Diabetes was induced experimentally in all rabbits, except group A. A 5 mm bone defect was created in right radii of all rabbits and following treatment was given: hydroxyapatite granules (group A and B), hydroxyapatite granules and insulin therapy (group C), cultured allogenic BMMSCs in hydroxyapatite scaffold and insulin therapy (group D). Histologic evaluation was performed on days 30, 60 and 90. Result: Combined therapy of allogenic BMMSCs in hydroxyapatite scaffold along with local insulin (group D) provided best healing response followed by healthy control (group A), locally insulin treated group (group C) and diabetic control (group B).
Perception of Fogera Cattle Farmers on Climate Change and Variability in Awi Zone, Ethiopia

This study aimed at assessing perception of Fogera cattle farmers on climate change and variability in selected districts of Awi zone. The zone was classified as lowland (2500 m.a.s.l) based on altitudinal variation from which a total of three districts one per cluster were selected through random sampling. 150 households were selected through systematic random sampling targeting Fogera cattle owners for primary data collection. Over 36 years (from 1983-2019) of meteorological data were taken from the National Meteorological Agency. Meteorological data result confirmed that climate was changing across all the agro-ecological zones. Both the mean annual maximum and minimum temperature was considerably increasing for all agro-ecological zones whereas the mean annual rainfall was decreasing which is consistent with the farmers’ perception. Meteorological data result also showed that the short rainy and dry season rainfall indicated high interannual variability at all agro-ecological zones. Survey result revealed that 97.13% of the farmers recognized climate change and variability impact in all agro-ecological zones. About 80.91% of Fogera cattle farmers reported the incidence of negative impacts of climate change and variability on cattle. Chi-square test values of survey results show that in all agro-ecological zones frequency of drought, duration of dry spell, wind, and floods were ever-increasing (p < 0.001). Moreover, about 84.48%, 65.3%, and 60.47% of farmers owning Fogera cattle in the lowland, midland, and highland, respectively perceived the prevalence of increasing (p < 0.001) cattle mortality. In response to climate change and variability, farmers were reducing number of livestock, diversification of livestock species, and replacing Fogera cattle with small ruminants as adaptation strategies. Thus, regular prediction of climate change and variability and designing pertinent response strategies is essential to reduce the adverse impacts of climate change for enhancing resilience capacity of the Fogera cattle farmers in the study areas.
Fuzzy Logic vs Equivalent Consumption Minimization Strategy for Energy Management in P2 Hybrid Electric Vehicles

This paper presents a comparison between a Fuzzy Logic and an Equivalent Consumption Minimization Strategy for the energy management of a Hybrid Electric Vehicle in P2 configuration, i.e. with the secondary energy converter located downstream the clutch. The design of the two methods is conducted aiming to minimize the fuel consumption. Although the adopted strategies are not charge sustaining, an additional goal of the techniques is to obtain a net energy extracted from the battery over a driving cycle that is not far from zero. The presented simulation results are obtained in the case of two homologation driving cycles, namely NEDC and WLTP. The objective of the study is to demonstrate that a non-optimal rule-based method can achieve a performance that is equivalent to a model-based optimal analytical approach.
SELF-CONFIDENCE DECREASES STRESS LEVELS AMONG YOUNG PEOPLE

Mental disorders are an important indicator for the quality of public health. Data from the second nationally representative epidemiological survey of the most common mental disorders in Bulgaria EPIBUL-2 shows that the risk to develop anxiety or depression is three times higher among young people in the age group 18-36 in comparison to the people in the age group above 65 years of the Bulgarian population (NCPHA, 2017b). Contemporary young people have been found to experience higher levels of stress in comparison to previous generations (Twenge, 2006). It is essential to find out the predictors of stress as it is one of the most common reasons causing depressive symptoms in modern society (Cohen et al., 1997). Previous research shows that self-confidence supports individuals in coping with stress in everyday life while the perception of personal inefficacy is related to depressive episodes (Bandura et al., 1999). The aim of the present work is to study the impact of self-confidence consisting of self-competence and self-liking on perceived stress levels in a sample of young people in Bulgaria. Regression analysis were performed to test the relationship between the two variables. The scale "Self-confidence" consisting of the subscales "Self-competence" and "Self-liking" is used for the first time on a sample of Bulgarian respondents, so its psychometric characteristics will be presented in the article.Results indicate that self-competence and self-efficacy are statistically significant predictors of the levels of perceived stress among young people, explaining a significant percentage of the variation of the dependent variable. The more confident young people feel in their capabilities, the better they cope with stress in everyday life.
Adsorption of Ni(II) from Aqueous Solution Using Oxidized Multiwall Carbon Nanotubes

In this work, oxidized multiwall carbon nanotubes (MWCNTs) were used as a novel adsorbent for removing Ni(II) from aqueous solution. The adsorption of Ni(II) onto oxidized MWCNTs was studied as a function of contact time, pH, ionic strength, MWCNT concentration, and temperature. The results showed that Ni(II) adsorption onto MWCNTs is strongly dependent on pH and oxidized MWCNT concentration and, to a lesser extent, ionic strength. Kinetic data indicated that the adsorption process achieved equilibrium within 40 min and follows a pseudo-second-order rate equation. The adsorption data fit the Langmuir model and its linearized form well, together with thermodynamic data indicating the spontaneous and endothermic nature of the process. Results of a desorption study showed that Ni(II) adsorbed onto oxidized MWCNTs could be easily desorbed at pH <2.0. Ion exchange may be the predominant mechanism of Ni(II) adsorption on oxidized MWCNTs. Oxidized MWCNTs may be a promising candidate for concentration of heavy me.
The orthorhombic and rhombohedral phases of - a neutron powder diffraction study

Neutron powder diffraction has been used to examine the crystal structure of the perovskite , at room temperature, and then at elevated temperatures to 1673 K. The orthorhombic structure at room temperature (Pbnm, a = 5.5245(1) A, b = 5.4922(1) A, c = 7.7740(2) A) was confirmed. At temperatures from about 420 K the structure is rhombohedral, in space group . The rhombohedral structure is characterized by rotation of the oxygen-atom octahedra about the threefold axis, and compression of these octahedra parallel to the same axis. The rotation angle varies from 11.0 to , and the octahedral strain parameter (a measure of the compression) from 0.969 to 0.983 over the temperature range of this study. The question as to whether the two effects are coupled is considered but not yet resolved.
Structure of Polynitrogen Clusters Encapsulated in C60: A Density Functional Study

Using density functional theory, we explore the possibility of trapping polynitrogen clusters inside C60 fullerene cages. We found that a maximum of 13 nitrogen atoms can be encapsulated in a C60 cage without distorting the C60 cage significantly. The nitrogen clusters in confinement exhibit unique stable structures in polymeric form, mostly in single- and double-bonded formations. The Nn@C60 molecules retain their structure, even at 300 K, for n ≤ 12. The Mulliken charge analysis shows a very small charge transfer in N@C60, consistent with the quartet spin state of N. However, for 2 < n < 10, charge transfer takes place from the cage surface to the Nn compounds, and inverse polarization thereafter.
Distribution and speciation of phosphorus in sediments of rivers in Ibadan, South-Western Nigeria

Abstract This study aims to separate various forms of inorganic phosphorus as well as determining the total phosphorus in river sediments in the city of Ibadan. Inorganic phosphorus was fractionated using appropriate extractants to obtain: loosely bound, Al-P, Fe-P, reductant and Ca-P. Results for total phosphorus ranged from 379 to 1156 μg P g-1. Inorganic phosphorus was found to be the major constituent of the total extractable phosphorus in all the rivers surveyed. Ca-P was the dominant inorganic form in 18 of the 27 samples analysed. Al-P was identified as the minor constituent of inorganic phosphorus in all samples and was identified as the least significant non-apatitic form in the sediment samples. The Bray-P1 available phosphorus ranged from 11 to 100 μg P g-1. The results of total phosphorus analysis in the sediments are indicative of the high pollution of some of the rivers. Speciation results reveal that most of the inorganic phosphorus is fixed in the apatitic form.
Caracterização química e mineralogia de solos antrópicos (terras pretas de índio) na amazônia central

Na Amazonia brasileira e comum a ocorrencia de sitios arqueologicos. Frequentemente, observa-se que as acoes humanas nesses sitios promoveram modificacoes significativas em muitas das caracteristicas fisicas, morfologicas e quimicas dos solos desses ambientes, tornando-os muito diferentes dos solos adjacentes, especialmente nas areas de terra firme da regiao. Embora muitos estudos tenham sido conduzidos visando compreender a magnitude dessas modificacoes e seus reflexos na genese dos solos influenciados, muitas questoes precisam ser mais bem compreendidas, sobretudo as relacionadas com a mineralogia desses solos. Este estudo teve como objetivo avaliar as caracteristicas quimicas, a composicao mineralogica das fracoes argila e areia e o grau de pedogenese de cinco perfis de solos com horizonte A antropico (Au), em ambientes de terra firme e varzea, localizados na Bacia Sedimentar do Amazonas, entre Coari e Manaus-AM. Amostras de solos foram coletadas, preparadas e submetidas as analises quimicas de rotina e caracterizadas quanto aos teores de carbono oxidavel e aos teores de Si, Fe, Al e P; adicionalmente, efetuou-se a identificacao dos minerais presentes nas fracoes argila e areia, por meio de difratometria de raios X. Os resultados mostraram que as modificacoes promovidas pela atividade humana levaram a melhoria da fertilidade do solo, resultando em solos com acidez moderada, elevados teores de Ca2+ e de P disponiveis e baixos teores de Al3+ trocavel. Esses resultados tambem revelaram teores muito elevados de P-total nos horizontes antropicos, variando entre 1.630 e 8.840 mg kg-1 de P2O5. A mineralogia da fracao argila dos solos antropicos de terra firme revelou dominância de caulinita, alem da ocorrencia de gibbsita, de goethita e de oxidos de titânio (anatasio). O perfil de varzea, alem de caulinita e goethita, apresentou tambem minerais do tipo 2:1 na fracao argila. A mineralogia da fracao areia dos solos estudados revelou dominância de quartzo, independentemente do ambiente. A fracao magnetica e composta por maghemita e hematita. Constatou-se, portanto, significativa riqueza quimica nos horizontes antropicos, bem como diferencas na composicao mineralogica desses horizontes.