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Open Journal of Geology 2017年第11期7卷 1670-1689页

作者： mohsen javan khosh kholgh Morteza Razmara Mohammad Ali Arian Department of Geology Faculty of Science North Tehran Branch Islamic Azad University Tehran Iran Department of Geology Ferdowsi University of Mashhad Mashhad Iran

The granitoids-diroretic complex and associated volcanic suits of Malek Siah Kuh (eastern Iran) were examined by RS, XRD, XRF, AAS and ICP-MS methods. The Multispectral data were used for differentiating of lithological units, main alterations, structural trends, and hydrothermally altered minerals. Based on the results of remote sensing, field studies and petrographic data, the complex classified into three main groups: 1) mafic unit (gabbro-basalt), 2) intermediate rocks (diorite-andesite suite) and 3) felsic unit (granitoide rocks). The complex is characterized by high Al2O3 and Sr contents as well as high Sr/Y and La/Yb ratios, while low in Y and Yb contents. The geochemical characteristics of these rocks indicate that they are similar to adakite like rocks. The complex is high calc-alkaline to shoshonitic nature. The results indicated derivation from similar silicate melt source followed by differentiation and assimilation of crustal rocks. Based on set of petrological and geochemical relations, 3 distinct stages of mineralization process can be recognized. 1) It is differentiation during magma evolution as well as metal enrichment and subsolidus leaching by hot fluids. 2) It occurred by ascending of the gas-rich magma and release of S and As. 3) It was accompanied by hydrothermal activities leading to the generation of sulfidation and associated polymetallic (Cu, Au, Fe) mineralization.

关键词： Malek Siah Kuh Igneous Complex Differentiation Assimilation

Recent Progress in Bionic Hydrogels for Articular Cartilage:Tribological and Mechanical Characteristics

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Journal of Bionic Engineering 2024年第2期21卷 653-673页

作者： Mohammad javan Almasi Dangsheng Xiong School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing210094China

Cartilage regeneration and repair are considered clinical challenges since cartilage has limited capability for *** tissue-engineered materials have the ability to repair cartilage,they have weak mechanical characteristics and cannot resist long-term *** the other hand,surgery to replace the joint is frequently done to treat significant cartilage deterioration these ***,the materials that are being used for replacement have high friction coefficients,lack shock absorption functions,and lack *** research on natural articular cartilage structure and function may lead to bionic hydrogels,which have suitable physicochemical and biological characteristics(e.g.,tribological and mechanical properties and the ability to support loadbearing capability),but need *** on their tribological and mechanical characteristics,the current review highlights the most recent advancements of bionic hydrogels used for articular cartilage,highlighting both the field's recent progress and its potential for future *** this reason,firstly,some important property improvement methods of bionic hydrogels are discussed and then,the recent findings of various research on the making of those bionic materials are provided and *** seems that by using some modifications such as product design,surface treatments,animal tests,controlling the isoelectric point of hydrogels,and computer simulation,the intended mechanical and tribological characteristics of natural articular cartilage may be attained by the bionic hydrogels.

关键词： Bionic hydrogel Articular cartilage Mechanical property Tribological property Lubrication

Assessment of the Seismic Behavior of the Reinforced Concrete Structures Based on the Probabilities

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Journal of Civil Engineering and Architecture 2011年第2期5卷 154-162页

作者： mohsen javan Pour Panam Zarfam Islamic Azad University Branch Dezfoul Iran Department of Civil Engineering Sharif University of Technology Tehran Iran

This paper presents an analytical foundation for probability-based formats for seismic design and assessment of structures. These formats are designed to be suitable for code and guideline implementation. The framework rests on non-linear, static seismic analysis. The formats can be used to ensure that the structural seismic design can be expected to satisfy specified probabilistic performance objectives, and perhaps （more novel） that it does so with a desired, guaranteed degree of confidence. Performance objectives are presumed to be expressed as the annual probability of exceeding a structural performance level. Structural performance levels are in turn defined as specified structural parameters （e.g., ductility, strength, maximum drift ratio, etc.） reaching a structural limit state （e.g. onset of yield, collapse, etc.）. The degree of confidence in meeting the specified performance objective may be quantified through the upper confidence bound on the （uncertain） probability. In order to make such statements, aleatory （random） uncertainty and epistemic （knowledge limited） uncertainty must be distinguished. The single seismic design foundation can be formatted into the alternative conventional design methods such as LRFD design and fragility-hazard design. Versions of the new developments reported here are already in place in recently completed seismic guidelines.

关键词： Non-Linear probability performance seismic uncertainty.

Laser beam effect on the entanglement of elastic collisions in quantum plasma

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Communications in Theoretical Physics 2024年第8期76卷 147-155页

作者： Ramin Roozehdar Mogaddam Nasser Sepehri javan Hosein Mohammadzadeh Department of Physics Ferdowsi University of MashhadPO Box 1436MashhadIran Department of Physics University of Mohaghegh ArdabiliPO Box 179ArdabilIran

In the quantized field formalism, using Kramers-Henneberger unitary transformation as the semi-classical counterpart of Block-Nordsieck transformation, the dynamics of entanglement during the low energy scattering processes in bi-partite systems at the presence of a laser beam fields are studied. The stationary-state Schrodinger equation for the quantum scattering process is obtained for such systems. Then, using partial wave analysis, we introduce a new form of entanglement fidelity considering the effect of high-intensity laser beam fields. The effective potential of hot quantum plasma including plasmon and quantum screening effects is used to obtain the entanglement fidelity ratio as a function of the laser amplitude, and plasmon and Debye length parameters for the elastic electron-ion collisions. It is shown that the plasma free electrons oscillations under interaction with laser beam fields improve the correlations between charged particles and consequently lead to the increase in the system entanglement.

关键词： laser entanglement quantum plasma elastic collision plasmon fidelity

Electromagnetically Induced Transparency of Two Intense Circularly-Polarized Lasers in Cold Plasma: Beat-Wave Second Harmonic Effect

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Communications in Theoretical Physics 2014年第2期61卷 246-252页

作者： N.Sepehri javan L.Akbari Department of Physics Faculty of Sciences University of Mohaghegh Ardabili Department of Physics Zanjan University

In the present paper the problem of nonlinear interaction of two mildly-relativistic circularly polarized lasers in a cold plasma is studied in order to investigate electromagneticaily induced transparency （EIT）. Based on a relativistic kinetic model, by expansion of relativistic Lorentz factor in terms of lasers amplitude, we obtain the coupled nonlinear dispersion relations. It is observed that due to resonance in the second harmonic of plasma beat-wave, the new EIT pass-band is created in the high intensities of lasers. The effect of amplitude and frequency variation on the dispersion is numerically investigated.

关键词： EIT laser-plasma interaction beat-wave dispersion second harmonic

Design and Fabrication of a MEMs Graphene-PDMS Based Flexible Strain Sensor

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Design and Fabrication of a MEMs Graphene-PDMS Based Flexibl...

作者： MISOI javan 湖南大学

学位级别：硕士

石墨烯是一种二维蜂窝状结构2杂化碳原子,可能性在许多应用程序中由于其优异的机械和电气性能。石墨烯的一个应用是在传感器领域。石墨烯在承受机械应变时,其电子性质不会退化,这对应变传感器有利。本文研究了石墨烯的某些特性,如压电... 详细信息

石墨烯是一种二维蜂窝状结构2杂化碳原子,可能性在许多应用程序中由于其优异的机械和电气性能。石墨烯的一个应用是在传感器领域。石墨烯在承受机械应变时,其电子性质不会退化,这对应变传感器有利。本文研究了石墨烯的某些特性,如压电电阻率和柔韧性,以展示如何利用它们制作应变传感装置。本文还讨论了成图石墨烯的制备过程及其在柔性衬底上的转移过程。开发一种可靠的石墨烯图形化过程是制造可拉伸石墨烯传感器的第一步。石墨烯通过光刻和蚀刻工艺制成图案,然后通过软光刻和氯化铁溶液对镍箔的湿法蚀刻相结合的方法转移到柔性聚合物基片上。石墨烯图形化是制造可靠、灵敏传感器的关键步骤。在这个过程中,石墨烯可以被一致地塑造成不同的形状和大小。利用石墨烯作为传感材料也是如此最后的装置是一个柔性石墨烯应变传感器,能够成功且可靠地测量出不同量级的应变,具有良好的线性度、良好的一致性和可重复性。该传感器的电阻值也较低,符合工业标准～1.5kohms

关键词：石墨烯机械应变软光刻技术

A meta-analytic review of Elliot's (1999) Hierarchical Model of Approach and Avoidance Motivation in the sport, physical activity, and physical education literature

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Journal of Sport and Health Science 2017年第1期6卷 68-80页

作者： Marc Lochbaum javan Jean-Noel Colleen Pinar Todd Gilson Department of Health Exercise and Sport Sciences Texas Tech University Department of Kinesiology Northern Illinois University

Purpose: The purpose of this quantitative review was to summarize the state of Elliot's Hierarchical Model of Approach and Avoidance Motivation, specifically the antecedents of the 2 × 2 achievement goals in the sport, physical activity, and physical education literature. In addition,the intercorrelations amongst the 2 × 2 goals were also ***: A systematic review of the literature was conducted. Meta-analytic procedures were used with the mean weighted sample correlation(rw) as the effect size metric. The antecedents were coded by Elliot's(1999) antecedent categories. A number of moderators were coded a ***: Based on a fixed effects model from 47 published studies(total unique n = 15,413) that met inclusion criteria, the 2 × 2 achievement goals were significantly correlated amongst each other ranging from small to medium to large in meaningfulness. Concerning the antecedents, overall they were theoretically correct in associations, but only a few of the relationships were medium in meaningfulness. Most relationships were small in meaningfulness. Heterogeneity was present for the interrcorrelation and antecedent ***: Future research is encouraged to grow and enrich the understanding of achievement goals within Elliot's complete Hierarchical Model of Approach and Avoidance Motivation to include both antecedents and outcomes simultaneously to improve upon the understanding of achievement motivation in sport, exercise, and physical activity settings.

关键词： Achievement motivation Antecedents Competence Mastery goals Meta-analysis Performance goals

Creating 3D texture tessellation on planar surface using a single tile or a few tiles

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FRONTIERS OF ARCHITECTURAL RESEARCH 2024年第6期13卷 1435-1446页

作者： javan, Anooshe Rezaee Abdelaal, Ahmed Xie, Yi Min RMIT Univ Ctr Innovat Struct & Mat Sch Engn Melbourne 3001 Australia

Tessellations have been widely used in architectural designs to create visually striking surfaces by repeating a small number of elements. While there has been extensive research on 2D tiling over the past 2000 years, this study focuses on the systematic development of a technique for the modular construction of 2D tiling with 3D texture surfaces using identical tiles, which is of great importance in architectural designs for cost-effective constructions through the mass production of repeating components. This study applies parametric geometrical modelling using Grasshopper scripting to generate a wide range of 3D reliefs on planar surfaces by repeating a single tile or a few different tiles. Based on the findings of this study, it is possible to arrange tiles with an identical 3D texture surface in multiple configurations, resulting in a range of 3D reliefs on tessellated surfaces that exhibit smooth transitions across adjacent tiles. A significant application of this technique is in producing stunning facades and other 3D surfaces using identical modules, offering affordable modular construction through repetition. The study also demonstrates the versatility of the technique by creating various attractive non-periodic 3D surfaces using triangular, square, hexagonal, or even non-regular tiles. (c) 2024 The Author(s). Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY license (http://***/ licenses/by/4.0/).

关键词： 3D tile Isohedral tiling 3D relief on planar surface Non-periodic tessellation

The combined effect of ultrasound treatment and leek (Allium ampeloprasum) extract on the quality properties of beef

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Food Bioscience 2022年第3期47卷 1060-1069页

作者： Ali Mehrabani Ashkan Jebelli javan Mohammad Ali Hesarinejad Ali Mahdavi Mahnoosh Parsaeimehr Department of Food Hygiene Faculty of Veterinary MedicineSemnan UniversitySemnanIran Department of Food Processing Research Institute of Food Science and Technology (RIFST)MashhadIran

One of the most important physicochemical properties of meat is its *** impact of Leek (Allium ampeloprasum ) extract and ultrasound on meat quality and molecular weight distribution of Longissimus lumborum muscles was *** have been treated with ultrasound (100 and 300 W during 10,20,and 30 min) and Leek-derived exogenous proteases (16.9 and 33.8U/g) simultaneously and *** combined effect of enzyme and ultrasound in 10 and 20 min increased the pH *** was also increased the proteolytic activity of *** meat quality,the filtering residues,cooking loss,shear force,and hardness were reduced;water-binding capacity,emulsion capacity,and emulsion stability were *** electrophoretic pattern of myofibrillar proteins showed the muscle fibers were severely degraded in the combined *** can be concluded that this process could be used as an alternative to the chemical tenderizing agents in the meat industry.

关键词： Leek extract Proteolytic activity Quality properties Tenderization Ultrasound-assisted enzyme treatment

Inhibition of lysine methyltransferase G9a/GLP reinstates long-term synaptic plasticityand synaptic tagging/capture by facilitatingprotein synthesis in the hippocampal CA1area of APP/PS1 mouse model ofAlzheimer’s disease

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Translational Neurodegeneration 2021年第2期10卷 294-296页

作者： javan Lee Tze Han Karen Ka Lam Pang Sheila Rui Xia Ang Mahima Sharma Sreedharan Sajikumar Department of Physiology Yong Loo Lin School of MedicineNational University of SingaporeSingapore 117597Singapore Neurobiology Programme Life Sciences InstituteNational University of SingaporeSingapore 117456Singapore Healthy Longevity Translational Research Programme Yong Loo Lin School of MedicineNational University of SingaporeSingapore 117456Singapore

Histone H3 lysine 9 di-methylation(H3K9me2)is an epigenetic repressive histone modification that was found at aberrant states in Alzheimer’s disease(AD)patient samples[1].The addition of H3K9me2/3 is mainly catalyzed by lysine methyltransferase G9a,which functions as a heteromeric complex with G9a-like protein(GLP).G9a/GLP has other non-histone substrates,including itself.G9a/GLP is implicated in regulating synaptic plasticity,learning and memory[2,3].

关键词： Alzheimer GLP plasticity