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Holographic dark energy in non-conserved gravity theory

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Communications in Theoretical Physics 2024年第4期76卷 126-133页

作者： H R Fazlollahi Institute of Gravitation and Cosmology Peoples Friendship University of Russia(RUDN University)6 Miklukho-Maklaya StMoscow117198Russia

Recently, reconsidering the Rastall idea T_(μ;νν)^(v)=α_(,μ) through relativistic thermodynamics gives a new form for the scalar field α which led us to construct modern modified theory of gravity debugged ‘non-conserved gravity theory’ Fazlollahi 2023 Euro. Phys. J. C 83 923. This theory unlike other modified theories of gravity cannot directly explain the current acceleration expansion in the absence of the cosmological constant and or existence of other forms of dark energy. Hence, in this study we have reinvestigated holographic dark energy Ρ_(X)~H^(2) in the non-conserved theory of gravity. In this context, the density and pressure of dark energy depend on the non-conserved term and density of the dust matter field. As shown, due to non-conservation effects on large-scale structures, unlike the original holographic model, our model onsets an acceleration epoch for the current Universe satisfies observations. Moreover, the interaction and viscous scenarios are studied for this model.

关键词： non-conserved gravity covariant form of thermodynamics holographic dark energy

Holographic dark energy from acceleration of particle horizon

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Chinese Physics C 2023年第3期47卷 218-224页

作者： H.R.Fazlollahi Institute of Gravitation and Cosmology Peoples Friendship University of Russia(RUDNUniversity)Moscow117198RussianFederation

Following the holographic principle,which suggests that the energy density of dark energy may be inversely proportional to the area of the event horizon of the Universe,we propose a new energy density of dark energy through the acceleration of the particle horizon scaled by the length of this *** proposed model depends only on one free parameter:β=*** values of β near zero,the deviation between the proposed model and the ∧ CDM model is significant,while forβ-→1.99,the suggested model has no conflict with the ∧ CDM *** of the value of β,the model considers dark energy to behave as matter with positive pressure in high redshifts,wx 0.33,while for present and near-future Universe,it is considered to behave similar to that in the cosmological constant model and phantom *** the model with the Ricci dark energy model,we show that our model reduces the errors of the Ricci dark energy model concerning the calculation of the age of old supernovae and evolution of different cosmic components in high ***,we calculated matter structure formation parameters such as the CMB temperature and matter power spectrum of the model to consider the effects of matter-like dark energy during the matter-dominated era.

关键词： cosmology holographic principle dark energy

Method for Collision Avoidance in Spacecraft Rendezvous Problems with Space Objects in a Phasing Orbit

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Computer Modeling in Engineering & Sciences 2021年第6期127卷 977-991页

作者： Danhe Chen A.A.Baranov Chuangge Wang M.O.Karatunov N.Yu.Makarov Nanjing university of Science and Technology Nanjing210094China Keldysh Institute of Applied Mathematics Russian Academy of SciencesMoscowRussia peoples’friendship university of russia(RUDN university) MoscowRussia

As the number of space objects(SO)increases,collision avoidance problem in the rendezvous tasks or reconstellation of satellites with SO has been paid more attention,and the dangerous area of a possible collision should be *** this paper,a maneuvering method is proposed for avoiding collision with a space debris object in the phasing orbit of the initial optimal ***,based on the plane of eccentricity vector components,relevant dangerous area which is bounded by two parallel lines is *** axises of eccentricity vector system pass through the end of eccentricity vector of phasing orbit in the optimal solution,and orientation of axis depends on the latitude argument where a collision will *** dangerous area is represented especially with the graphical dialogue,and it allows to find a compromise between the SO avoiding and the fuel consumption *** proposed method to solve the collision avoidance problem provides simplicity to calculate rendezvous maneuvers,and possibility to avoid collisions from several collisions or from“slow”collisions in a phasing orbit,when the protected spacecraft and the object fly dangerously close to each other for a long period.

关键词： Spacecraft collision avoidance rendezvous problem space objects phasing orbit

Determination of the causes and the effects of storage conditions on the quality of silo stored wheat(Triticum aestivum)in Zimbabwe

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Natural Products and Bioprospecting 2012年第1期2卷 21-28页

作者： Tinotenda Admire MHIKO peoples’friendship university of russia 6 Miklukho-Maklay StreetMoscow 117198Russia

There are still cases of millers returning poor quality red wheat to the Zimbabwe Grain Marketing Board(GMB)and this has been an ongoing problem over the past few years.A larger amount of this wheat has discoloured and damaged embryos and it is discounted by millers because the germs are brittle and they crumble *** have been also many rejections of the red wheat particularly by major *** there was an urgent need to investigate the causes and effects of storage conditions on the quality of silo-stored red wheat,since red wheat is one of human beings’main food supplies.A representative sample of 2.25 kg of red winter wheat was randomly collected from the common red winter wheat incoming to the Grain Marketing Board Depot for *** representative sample of 2.25 kg was used as the control sample and its test density was *** control sample was then finely ground and analysed for protein,moisture,ash,aflatoxins and falling *** red winter wheat was then stored in six different silos for a period of 5 months,with each silo having different humidity and temperature *** samples of 4.5 kg were randomly collected monthly from each silo during the storage *** test densities of the representative samples were *** representative samples were then finely ground and analysed for protein,moisture,ash,aflatoxins,and falling *** results of the red wheat in storage were then compared with those of the control sample and analysed by analysis of variance(ANOVA)at the 5%level of *** obtained after data analysis suggest that there were significant differences in the protein content,moisture content and falling number of the wheat before and after ***,differences in test density,aflatoxin and ash contents of the wheat before and after storage were not statistically significant at the 5%level of *** deterioration in wheat quality was attributed to the hig

关键词： Triticum aestivum falling number aflatoxins silo

Research on the Linkage Effect and Coordinated Development Between Public Libraries Construction and Innovation Efficiency:Theoretical and Empirical Evidence from China

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Journal of Systems Science and Information 2024年第5期12卷 647-666页

作者： Jiacheng GAO Yue LIU Faculty of Economics Belarusian State UniversityMinsk 220030Belarus Higher School of Management Peoples’Friendship University of RussiaMoscow 117198Russia

Based on the panel data of 29 provincial administrative regions in China from 2011 to 2022,this study uses the entropy weighting method and the global super-efficiency SBM model to evaluate and measure the public libraries construction level and innovation efficiency in China,uses the vector autoregression model,theαconvergence model and theβconvergence model to evaluate and test whether there is a positive linkage effect between public libraries construction and innovation efficiency,and uses the coupling coordination model to calculate and analyze the coupling coordination degree between public libraries construction and innovation *** results show that China’s public libraries construction and innovation efficiency are generally in a good development trend,but there is still a large gap from reaching a high *** is a positive linkage effect between China’s public libraries construction and innovation efficiency,which can not only promote each other’s development,but also drive each other to achieve regional balanced *** coupling coordination degree between China’s public libraries construction and innovation efficiency is showing a steady upward trend,but it is still on the verge of imbalance as a whole,and the eastern region is significantly better than the central region and western *** results reveal the positive linkage effect between public libraries construction and innovation efficiency,which has enlightenment significance for building a strong country in culture and *** on this,this study puts forward suggestions on increasing investment in public libraries construction,optimizing the configuration structure of innovation factors,and strengthening the deep integration of public libraries construction and innovation activities,so as to give full play to the positive linkage effect between public libraries construction and innovation efficiency.

关键词： public libraries innovation efficiency linkage effect convergence test coordinated development

Innovation:A state-of-the-art review and typology

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International Journal of Innovation Studies 2023年第4期7卷 281-290页

作者： Dmitry M.Kochetkov Centre for Science and Technology Studies Leiden UniversityLeidenthe Netherlands peoples'friendship university of russia(RUDN university) MoscowRussia

Innovation is often an object of study in economics and ***,the social and behavioral aspects of innovation acceptance are as important as the economics of product development.A significant portion of the literature considers innovation as a change in the way social actions are conducted,entailing a wide range of social,economic,behavioral,and institutional *** approaches have given rise to the need for a ***(1998)divided innovation into three groups depending on the aspects of the phenomenon:theory of entrepreneurship,technological and social aspects,and strategic *** Sundbo's conceptual framework,this study supplemented and developed it based on recent literature that appeared after ***,this study added new directions at the second level of decomposition and the relationships between different aspects of *** particular,this study analyzed phenomena such as open innovation,agile innovation,and“helix”***,this study developed a novel typology of innovation that expands the theoretical knowledge in this *** on these findings,this study proposed promising areas for future innovation studies.

关键词： Innovation Entrepreneurship Typology Triple helix

Sustainable functionalization and modification of materials via multicomponent reactions in water

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Frontiers of Chemical Science and Engineering 2022年第9期16卷 1318-1344页

作者： Siamak Javanbakht Tahereh Nasiriani Hassan Farhid Mohammad Taghi Nazeri Ahmad Shaabani Department of Organic Chemistry Shahid Beheshti UniversityTehran ***Iran Рeoples’friendship university of russia(RUDN university) Moscow 117198Russian Federation

In materials chemistry,green chemistry has established firm ground providing essential design criteria to develop advanced tools for efficient functionalization and modification of ***,the combination of multicomponent reactions in water and aqueous media with materials chemistry unlocks a new sustainable way for constructing multi-functionalized structures with unique features,playing significant roles in the plethora of *** reactions have received significant consideration from the community of material chemistry because of their great efficiency,simple operations,intrinsic molecular diversity,and an atom and a pot ***,by rational design of multicomponent reactions in water and aqueous media,the performance of some multicomponent reactions could be enhanced by the contributing“natural”form of water-soluble materials,the exclusive solvating features of water,and simple separating and recovering *** date,there is no exclusive review to report the sustainable functionalization and modification of materials in *** critical review highlights the utility of various kinds of multicomponent reactions in water and aqueous media as green methods for functionalization and modification of siliceous,magnetic,and carbonaceous materials,oligosaccharides,polysaccharides,peptides,proteins,and synthetic *** detailed discussion of synthetic procedures,properties,and related applicability of each functionalized/modified material is fully deliberated in this review.

关键词： materials multicomponent reactions modification functionalization water

Photodynamic Therapy for Gynecological Diseases and Breast Cancer

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Clinical oncology and cancer researeh 2012年第1期9卷 9-17页

作者： Natashis Shishkova Olga Kuznetsova Temirbolat Berezov Department of Biochemistry School of MedicinePeople's Friendship University of Russia

Photodynamic therapy （PDT） is a minimally invasive and promising new method in cancer treatment. Cytotoxic reactive oxygen species （ROS） are generated by the tissueqocalized non-toxic sensitizer upon illumination and in the presence of oxygen. Thus, selective destruction of a targeted tumor may be achieved. Compared with traditional cancer treatment, PDI has advantages including higher selectivity and lower rate of toxicity. The high degree of selectivity of the proposed method was applied to cancer diagnosis using fluorescence. This article reviews previous studies done on PDT treatment and photodetection of cervical intraepithelial neoplasia, vulvar intraepithelial neoplasia, ovarian and breast cancer, and PDT application in treating non-cancer lesions. The article also highlights the clinical responses to PDT, and discusses the possibility of enhancing treatment efficacy by combination with immunotherapy and targeted therapy.

关键词： photodynamic therapy photosensitizers cervical/vulvar intraepithelial neoplasia ovarian neoplasms breast neoplasms

Shungite as the natural pantry of nanoscale reduced graphene oxide

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International Journal of Smart and Nano Materials 2014年第1期5卷 1-16页

作者： Elena F.Sheka Natalia N.Rozhkova General Physics Department Peoples’Friendship University of RussiaMoscow 117198Russian Federation Institute of Geology Karelian Research Centre RASPetrozavodskRussian Federation

Shungite is presented as a natural carbon allotrope of a multilevel fractal structure that is formed by a successive aggregation of~1 nm reduced graphene oxide *** stacks of the sheets of~1.5 nm in thickness and globular composition of the stacks of~6 nm in size determine the secondary and tertiary levels of the *** of globules of tens of nanometers complete the *** theory of graphene oxide,supported by large experience gained by the modern graphene science,has led to the foundation of the suggested *** microscopic view has found a definite confirmation when analyzing the available empirical appearance of *** our knowledge,this is the first time a geological process is described at quantum level.

关键词： shungite reduced graphene oxide molecular theory