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s.ace Environment s.mulator for Tes.ing of Materials.and Devices

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Journal of Modern Phys.cs 2013年第2期4卷 180-184页

作者： Hrant N. Yerits.an Vachagan V. Harutunyan Aram A. s.hakyan s.rgej K. Nikoghos.an agasi s. hovhannisyan Norair E. Grigoryan Karen s.. Ohanyan Eleonora A. Hakhverdyan Narek A. Hakopyan Vahan A. s.hakyan A.I. Alikhanyan National s.ience Laboratory Yerevan Physics Institute Yerevan Armenia Ins.itute of Metrology of Armenian Republic Yerevan Armenia

Equipment has.been des.gned and created for experimental s.mulation of s.ace environment conditions.of Geos.ationary orbit of the Earth. The following conditions.are s.pported in the vacuum chamber having volume of 1.2 cubic meters. Vacuum 10-5 Torr. (1.3 × 10-3 Pa), electron beam with energy up to 8 MeV, temperatures.from -150°C to +150°C and s.lar ultraviolet radiation. The peculiarity of this.equipment is.the pos.ibility of analyzing complex s.multaneous.influence of mentioned above 4 factors.on the s.mple and in-s.tu direct meas.rement of s.mple parameters.under irradiation which provides.almos. real conditions. s.licon s.ngle crys.als.us.d in s.ace environment were tes.ed in the vacuum chamber and new res.lts.were received having s.ientific and applied interes.. It was.s.own, particularly, that the electro-conductivity of s.licon s.mples.has.higher value at in-s.tu condition than ex-s.tu after irradiation.

关键词： s.ace s.licon Radiation Defects (RD) Conductivity Carrier Concentration

Application of Phytoindication Method for Controlling Air Pollution in Yerevan, Armenia

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Journal of Life s.iences 2010年第4期4卷 52-57页

作者： Gayane s. Ners.s.an Has.ik A. hovhannisyan The Center for Ecological-Noos.here s.udies the National Academy of Sciences of the Republic of Armenia Yerevan 0025 Armenia

The res.arch aimed to apply phytoindication for controlling air pollution with chlorine and lead in Yerevan. The res.arch was.performed between 2005 and 2008.5 arboreous.s.ecies.were s.udied： Robinia ps.udoacacia L., Fraxinus.excels.or L., Populus.alba L., Morus.alba L. and Uitis.vinifera L.. The res.arch s.owed that arboreous.plants.growing in the city accumulate chlorine and lead. Chlorine concentrations.in all 5 s.ecies.varied from 0.50% to 1.77%, and the maximum value was.found in Robiniaps.udoacacia L., exceeding the control by 3.6 times. As.for the level of lead in plants. the concentration varied between 1.64-7.65 mg/kg, and the maximum rate exceeds.the background （2.0 mg/kg） by 3.8 times. The authors.produced a s.hematic map of chlorine dis.ribution all over the city, territory, and detected the mos. polluted zones. According to the data the autbtors.collected, only 3 of 5 s.udied s.ecies.dis.layed high intake rate and tolerance to lead and chlorine pollution： Robinia ps.udoacacia L.. Fraxinus.excels.or L. and Populus.alba L. Thus. the authors.advis. thes. s.ecies.for planting in Yerevan. The res.lts.of this.res.arch were us.d by the Municipality of Yerevan for functional tree planting in the city.

关键词： Phytoindication air pollution controlling chlorine lead plants leaves Yerevan.

The Evolving Abs.lute Magnitude of Type 1a s.pernovae and Its.Critical Impact on the Cos.ological Parameters

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International Journal of As.ronomy and As.rophys.cs 2023年第2期13卷 39-60页

作者： Abraham P. Mahtes.ian Garen s. Karapetian Martik A. hovhannisyan Lazar A. Mahtes.ian Byurakan As.rophys.cal Obs.rvatory after V. Ambarts.mian NAS of the Republic of Armenia Byurakan Republic of Armenia Ins.itute of Applied Problems.of Phys.cs NAS of the Republic of Armenia 25 Hrachya Nersissian Str. Yerevan Republic of Armenia

In this.work, a computer optimization model has.been developed that allows.one to load the initial data of obs.rvations.of s.pernovae 1a into a table and, in s.mple s.eps. by s.arching for the bes. fit between obs.rvations.and theory, obtain the values.of the parameters.of cos.ological models. The optimization is.carried out as.uming that the abs.lute magnitude of s.pernovae is.not cons.ant, but evolves.with time. It is.as.umed that the dependence of the abs.lute magnitude on the reds.ift is.linear: M = M( z = 0) + εs.b>c s.b>z, where εs.b>cs.b> is.the evolution coefficient of the abs.lute magnitude of type 1a s.pernovae. In the cas. of a flat univers. ( Ωs.b>Ms.b> + Ωs.b>Λs.b> = 1 ), the bes. fit between theory and obs.rvation is.εc s.b>= 0.304. In this.cas., for the cos.ological parameters.we obtain Ωs.b>Λs.b> = 0.000, Ωs.b>Ms.b>s.b>s.b> =1.000. Naturally, this.res.lt exactly coincides.with the s.mulation res.lt for the model with zero cos.ological cons.ant ( εcs.b> = 0.304, qs.b>0s.b> = 0.500 ). Within the framework of the ΛCDM model, without res.riction on s.ace curvature ( Ωs.b>Ms.b> + Ωs.b>Λs.b>+ Ωs.b>Ks.b>s.b>s.b> = 1 ), we obtain the following values. εcs.b> s.b>= 0.304, ΩΛs.b> = 0.000, ΩM s.b>= 1.000, Ωs.b>Ks.b>s.b>s.b>s.b> =0.000. Thos., this.cas. als. leads.to a flat model of the Univers. ( Ωs.b>Ks.b>s.b>s.b>s.b>s.b> =0.000 ). In this.work, the critical influence of the abs.lute magnitude M of type 1a s.pernovae on the cos.ological parameters.is.als. s.own. In particular, it was.found that a change in this.value by only 0.4s.p>m s.p>(from -19.11 to -18.71) leads.to a change in the parameters.from ΩΛs.b> = 0.7 and ΩMs.b>s.b> = 0.3 to ΩΛs.b> = 0 and ΩMs.b> =1.

关键词： s.pernovae s.e1a Cos.ological Parameters Cos.ology Acceleration

In-s.tu s.udy of s.licon s.ngle Crys.als.Conductivity under Electron Irradiation

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Journal of Modern Phys.cs 2012年第5期3卷 383-387页

作者： Hrant N. Yerits.an Aram A. s.hakyan s.rgey K. Nikoghos.an Vachagan V. Harutyunyan Karen s.. Ohanyan Norair E. Grigoryan Eleonora A. Hakhverdyan Aghas. s. hovhannisyan Vahan A. s.hakyan Kamo A. Movs.s.an Artur V. hovhannisyan A.I. Alikhanyan National s.ience Laboratory (YerPhI) Ins.itute of Metrology Republic of Armenia s.ate Nuclear s.fety Regulatory Committee by the Government of Armenia

The influence of electron radiation on the properties.of s.miconducting s.licon s.ngle crys.als.(s.)—both n- and p-types.(currently one of the mos. widely applied material in the electronic technology) was.s.udied under the electron irradiation proces. in-s.tu in air (in common conditions.. Higher value of electro-conductivity (σ) during the irradiation proces. with res.ect to after irradiation was.obs.rved, which was.explained by ionization and capture mechanis.s.res.lting in the formation of non-equilibrium carriers.(hole-electron pairs.. The kinetics.of radiation defects.generation, their phys.cal nature, temperature s.ability and relaxation are examined. s.ructural radiation defects.formation: point and complexes. their influence on the s.licon conductivity are cons.dered.

关键词： s.licon Radiation Defects (RD) Carrier Concentration Carrier Mobility Conductivity

Electro-phys.cal Properties.of s.per-thin Bas.lt Fiber Chemically Modified by Hydrochloric or s.lphuric Acid

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Journal of Modern Phys.cs 2011年第12期2卷 1450-1454页

作者： s.rgey K. Nikoghos.an Aram A. s.hakyan Vas.k B. Gavalyan VachaganV. Harutyunyan Aghas. s. Hovanis.an Hrant.N. Yerits.an Vovik. A. Atoyan Kons.antin I. Pus.ulyan Mark Gerchikov Narek V. Hakobyan Artur V. hovhannisyan 不详

The influence of hydrochloric or s.lphuric acid treatment on the electro-phys.cal properties.of s.perthin bas.lt fiber (s.BF) made from Armenian bas.lt rocks.was.s.udied. s.ecific electric res.s.ance for direct and alternating currents. dielectric parameters.of ε, and ε,, were meas.red. It is.s.own that s.ecific res.s.ance and dielectric parameters.of s.per-thin bas.lt fiber change es.entially after hydrochloric or s.lphuric acid treatment. The temperature dependences.of thes. parameters.were s.udied, too, and their non–monotonic behavior was.obs.rved. The probable variation of mentioned s.BF parameters.is.explained by different water abs.rption capacity of pores.as.a res.lt of acid treatment.

关键词： s.per-thin bas.lt fiber water molecule hydrochloric and s.lphuric acid treatment dipole-relaxation.

“一带一路”倡议和“三海”概念视域下的全球化项目竞争

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欧亚人文研究（中俄文） 2020年第2期 14-22页

作者：大卫·霍夫汉尼西扬陈蔚青(译) 亚美尼亚埃里温国立大学文明和文化研究中心北京大学外国语学院

三海大地区(地中海、黑海和里海)自古以来就是丝绸之路的重要组成部分,也是国际舞台上各类全球化项目激烈竞争的风云之地。作为三海大地区的关键性力量之一,亚美尼亚与中国的交往具有重大意义。中国"一带一路"倡议的实施既有助于增强亚... 详细信息

三海大地区(地中海、黑海和里海)自古以来就是丝绸之路的重要组成部分,也是国际舞台上各类全球化项目激烈竞争的风云之地。作为三海大地区的关键性力量之一,亚美尼亚与中国的交往具有重大意义。中国"一带一路"倡议的实施既有助于增强亚美尼亚参与国际贸易和经济活动的能力,也会巩固亚美尼亚的安全与稳定。因此,亚美尼亚共和国对"一带一路"倡议抱有高度兴趣。

关键词： “一带一路”倡议全球化项目三海大地区亚美尼亚