Enhanced Reversible Magnetic-Field-Induced Strain in Ni-Mn-Ga Alloy

A phase-field model was developed to simulate the ferromagnetic domain structure and martensite variant microstructure of Ni-Mn-Ga shape-memory alloy. The evolution of reversible magnetic-field-induced strain (MFIS) and associated magnetic domain/martensite variant structure were modeled under an external magnetic field. It was found that MFIS increased significantly from 0.2% to 0.28% as the temperature increased from 265 K to 285 K. In addition, compressive pre-stress efficiently enhanced the MFIS of the alloy, while tensile stress reduced MFIS. Furthermore, it was proved that there was possibility of achieving similar enhancement of MFIS by replacing compressive stress with perpendicular biaxial tensile stress. The results revealed that the residual variant induced by stress plays an important role in the reversible MFIS effect.

Murburn precepts for redox dynamics in glycolysis, Cori cycle and Warburg effect: Is lactate dehydrogenase a murzyme?

Physiological redox conversion of alpha-hydroxy/keto acids is believed to be reversibly carried out by (de)hydrogenases, employing nicotinamide cofactors. With lactate dehydrogenase (LDH) as example, we point out that while the utilization of NADH for the reduction of pyruvate to lactate (the post-glycolytic reaction) can be mediated via the classical Michaelis-Menten mechanism, the oxidation of lactate to pyruvate (with or without the uphill reduction of NADH) necessitates alternative physiological approaches. This reaction could be more efficiently coupled/catalyzed with/by murzyme activities, which employ diffusible reactive (oxygen) species (DRS/DROS/ROS). Such a scheme would enable the cellular system to tide over the unfavorable energy barriers of the forward reaction (~450 kJ/mol; earlier considered to be ~25 kJ/mole!), and give kinetically viable conversions. Further, the new mechanism does not necessitate any ‘smart decision-making’ by the pertinent redox isozyme(s). For LDH, the new theory explains its multimeric nature, non-variant structure of the isozymes’ active sites and accounts for why lactate is transported to the liver for further utilization within the physiological purview of Cori cycle. The theoretical insights, in silico evidence and analyses of literature herein also enrich our understanding of ‘lactic acidosis’ (in clinical context), Warburg effect and approach for cancer therapy.

Multi-scale modelling of the damage behavior for 3D woven composites with variant structure

In the process of fabricating a three-dimensional (3 D) woven perform, the variant structures introduced during adding and reducing tows, lead to changes of local tow orientation and woven pattern, which affects the mechanical response of 3 D woven composite. In this study, specimens with variant structure were manufactured by adding and reducing tow techniques, and representative unit cells of normal and variant structure were established by topological method. A multi-scale damage model was proposed to analyze the damage behaviors and predict the strength of 3 D woven composites with the user subroutine UMAT of ABAQUS/Standard. The results show that the variation of tensile modulus and strength between the experimental and simulation value were less than 4%. In addition, it is proved that the damage propagation of the macro-scale model with variant structure can be successfully captured.

EVALUASI KUALITAS ARGUMEN PADA ARTIKEL JURNAL

Argumentasi sangat penting dalam artikel ilmiah. Oleh karena itu, penelitian ini bertujuan mengungkap kualitas argumentasi dalam artikel ilmiah pada jurnal dengan scope pendidikan bahasa Indonesia. Kualitas jurnal akan dievaluasi berdasarkan perspektif Toulmin. Evaluasi dipaparkan dalam pembagian kualitas argumentasi, struktur varian yang tampak dalam paragraf argumentasi, dan peringkat kualitas argumentasi pada jurnal terindeks sinta 2 sampai 6. Untuk mengungkap kualitas argumen tersebut, peneliti menggunakan pendekatan mixed method. Hasil temuan dari penelitian ini, pertama: secara umum kualitas argumen dalam artikel yang berfokus pada pendidikan bahasa Indonesia masih rendah. Argumen secara dominan disajikan dengan struktur P-D. Kedua, terdapat empat varian struktur argumen yang ditemukan, yaitu: P-D, P-D-J, P-D-T, dan P-D-J-T. Ketiga, kualitas argumen berdasarkan nilai rerata konversi menunjukkan jurnal terakreditasi sinta 2 memiliki kualitas masuk pada klasifikasi sedang. Sementara artikel pada jurnal terakreditasi 3, 4, 5, 6 dan tidak terakreditasi memiliki kualitas argumen tergolong pada kategori rendah.Kata kunci: kualitas argumen, wacana, perspektif toulminEVALUATING THE QUALITY ARGUMENT IN JOURNAL ARTICLESAbstrakArguments are very important in scientific articles. This study aims to reveal the quality of arguments in scientific articles in journals with the scope of Indonesian language education. The quality of the journal will be evaluated based on the Toulmin’s perspective. Evaluation is described in the division of argumentation quality, variant structure that appears in the argumentation paragraphs, and argumentation quality ratings in indexed journals 2 to 6. To reveal the quality of the arguments, the researcher uses a mixed method approach. The findings of this study are as follows. First: in general, the quality of the arguments in articles that focus on Indonesian language education is still low. The argument is predominantly presented with a P-D structure. Second, there are four variants of the argument structure found, namely: P-D, P-D-J, P-D-T, and P-D-J-T. Third, the quality of the argument based on the average conversion value shows that the Sinta 2 accredited journals have medium classification. Meanwhile, articles in accredited journals 3, 4, 5, 6 and un-accredited have the quality of their arguments in the low category.Keywords: quality of arguments, discourse, Toulmin's perspective

A study on resin infusion and effects of reinforcement structure at dual scales by a quasi-realistic numerical simulation method

In this article, we propose a random fiber configuration method to set up quasi-realistic geometric models of the fibrous tow in reinforcement. Finite element method is applied to simulate the injection of resin at dual scales (both intra and inter tows, 2D and 3D models). Permeabilities of dual scales in three directions (in horizonal, vertical and longitudinal directions) are also explored. The influence of variant structure parameters on the permeability is discussed in the meantime. Flow front tracking considering surface tension effect based on the dual-scale model is carried out to predict resin flow through the fibrous reinforcement.

Магнитоотражение и эффект Керра в пленках La-=SUB=-2/3-=/SUB=-Ba-=SUB=-1/3-=/SUB=-MnO-=SUB=-3-=/SUB=- с вариантной структурой

A correlation was found between the magnetoreflection of natural light and tunneling magnetoresistance in La2 / 3Ba1 / 3MnO3 films with a variant structure grown on ZrO2 (Y2O3) substrates. It was shown that the magnetoreflection as well as the colossal magnetoresistance, is maximum in the region of magnetic ordering near room temperature (Tc ~ 295 K) of the films. The magnetoreflection spectra of a La2 / 3Ba1 / 3MnO3 film with the variant structure are formed by the same mechanisms as in the case of films without the variant structure and can be described in terms of the theory of the magnetorefractive effect. The field and temperature dependences of magnetoreflection demonstrate the presence of an additional low-temperature contribution to the reflection of the La2 / 3Ba1 / 3MnO3 film due to tunneling of spin-polarized electrons through the boundaries of structural domains.

The transactional asset pricing approach

Purpose The purpose of this paper is to present a methodology based on the transactional asset pricing approach (TAPA) and to illustrate the application of TAPA within the context of professional property valuation. Design/methodology/approach The TAPA is a novel analytical valuation methodology recasting the traditional derivations of the income approach techniques, including DCF, from a transactional perspective based on the principle of inter-temporal transactional equity, instead of the conventional investor-specific view originating from I. Fisher (1907, 1930). Findings The authors present DCF analysis as a specific case of a more general TAPA approach to valuation under the income method. This also leads to novel analytical derivations of the Direct income capitalization, Gordon, Inwood, Hoskold and Ring models. Based on the TAPA framework, the authors also research the value-enhancing effects of benchmark market volatility on the subject property value and conclude that such effects can be statistically significant depending on the DCF analysis period. Research limitations/implications The research has a direct bearing on time-variable discount rate forecasting capabilities, as it uses a time-variant structure for the discount rates. Practical implications Using the US Case-Shiller and BLS rental indices as a valuation benchmark, the paper contains an example of applying the general TAPA framework to value a notional property under a TAPA’s DCF version. Such property valuations can be easily replicated in practice – especially in the context of equitable/fair value determination under the International Valuation Standards Council valuation standards. Social implications TAPA is a deductive principles-based theory of asset valuation especially fit for the transactional and illiquid asset valuation contexts – thus enabling a more efficient pricing for such assets in a sense of reflecting the transactional interests of the parties more closely than achievable under the conventional valuation methods. Originality/value TAPA is an original filiation of research with roots going as far back as Aristotelian Catallactics. It contains analytical formalizations of certain transactional equity principles.