Search Results - "Popa, Alexandru"

Die Hunnen kommen! Zur Deutung den Brandschuttschichten und Zerstörungshorizonten innerhalb der spätkaiserzeitlichen Fundstellen der Sântana de Mures-Černjachov-Kultur / The Huns are coming! On the interpretation of layers of fire debris and horizons of destruction within the late Imperial period sites of the Sântana de Mures-Černjachov culture by Popa, Alexandru

“…In the collective memory of many European people, the Huns are perceived as one of the most violent gentes west of the Dniester, which might have committed…”
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The Frontiers of the Roman Empire in Eastern Dacia. Preliminary Results of Research Conducted in the Context of the Romanian National Limes Program by Alexandru Popa

“…The visible and invisible traces of the Roman Frontier in Dacia have been, for quite a long time, one of the most representative archaeological sites in…”
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Functionalized Ordered Mesoporous MCM-48 Silica: Synthesis, Characterization and Adsorbent for CO2 Capture by Borcănescu, Silvana, Popa, Alexandru, Verdeș, Orsina, Suba, Mariana

“…The ordered mesoporous silica MCM-48 with cubic Ia3d structure was synthesized using the cationic surfactant hexadecyltrimethylammonium bromide (CTAB) as a…”
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Effect of Temperature on CO2 Adsorption onto Amine-Functionalized KIT-6 Adsorbents by Suba, Mariana, Verdeș, Orsina, Borcănescu, Silvana, Popa, Alexandru

“…The mesoporous silica KIT-6 was synthesized and functionalized with 3-aminopropyltriethoxysilane (APTES) by grafting at 110 °C. The composites were prepared…”
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On the trace formula for Hecke operators on congruence subgroups by POPA, ALEXANDRU A.

“…We give a new, simple proof of the trace formula for Hecke operators on modular forms for finite index subgroups of the modular group. The proof uses algebraic…”
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Modular forms and period polynomials by Paşol, Vicenţiu, Popa, Alexandru A.

“…We study the space of period polynomials associated with modular forms of integral weight for finite‐index subgroups of the modular group. For the modular…”
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On advanced global strength analysis of a pleasure yacht by user’s procedures implemented in FEMAP / NX Nastran by Popa, Alexandru, Domnișoru, Leonard

“…The objective of this study is to analyze the global structural strength of a pleasure yacht by advanced FEA approach. This is accomplished by developing and…”
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A combinatorial refinement of the Kronecker-Hurwitz class number relation by POPA, ALEXANDRU A., ZAGIER, DON

“…We give a refinement of the Kronecker-Hurwitz class number relation, based on a tesselation of the Euclidean plane into semi-infinite triangles labeled by…”
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Choosing between commercially pure titanium and Ti-6Al-4V gyroid structures for orthopedic applications: An analysis through Timoshenko beam theory, the Gibson-Ashby model and experimental methods by Depboylu, Fatma Nur, Yasa, Evren, Poyraz, Özgür, Korkusuz, Feza, Popa, Andrei-Alexandru

“…For decades, research has focused on using gyroid lattice structures to prevent stress-induced osteopenia and improve osseointegration by promoting cell…”
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Approximate and exact results for the harmonious chromatic number by Marinescu-Ghemeci, Ruxandra, Obreja, Camelia, Popa, Alexandru

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Preparation and characterisation of amino-functionalized pore-expanded mesoporous silica for carbon dioxide capture by Popa, Alexandru, Borcanescu, Silvana, Holclajtner-Antunović, Ivanka, Bajuk-Bogdanović, Danica, Uskoković-Marković, Snežana

“…In this study, the preparation of some large-pore ordered mesoporous silicas using a proper surfactant with different swelling agents was carried out. The…”
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Synthesis, Characterization and Antimicrobial Activity of Multiple Morphologies of Gold/Platinum Doped Bismuth Oxide Nanostructures by Ianăși, Cătălin, Nemeş, Nicoleta Sorina, Pascu, Bogdan, Lazău, Radu, Negrea, Adina, Negrea, Petru, Duteanu, Narcis, Ciopec, Mihaela, Plocek, Jiri, Alexandru, Popa, Bădescu, Bianca, Duda-Seiman, Daniel Marius, Muntean, Delia

“…Bismuth oxides were synthesized from bismuth carbonate using the sol-gel method. Studies have described the formation of Bi2O3, as a precursor of HNO3…”
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On the trace formula for Hecke operators on congruence subgroups, II by Popa, Alexandru A.

“…In a previous paper, we obtained a general trace formula for double coset operators acting on modular forms for congruence subgroups, expressed as a sum over…”
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Ni and Ce Grafted Ordered Mesoporous Silica KIT-6 for CO2 Adsorption by Mariana Suba, Alexandru Popa, Orsina Verdeș, Silvana Borcănescu, Paul Barvinschi

“…In this study, the Ni/KIT-6 and Ce/KIT-6 materials were prepared through the impregnation method and then amino-functionalized materials were obtained by the…”
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An Intelligent IoT-Based Food Quality Monitoring Approach Using Low-Cost Sensors by Popa, Alexandru, Hnatiuc, Mihaela, Paun, Mirel, Geman, Oana, Hemanth, D., Dorcea, Daniel, Son, Le, Ghita, Simona

“…The evolution of multipurpose sensors over the last decades has been investigated with the aim of developing innovative devices with applications in several…”
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NewsCompare - A novel application for detecting news influence in a country by Pop, Cristian, Popa, Alexandru

“…We present a new application, developed mostly from scratch, serving as a fast and efficient web crawler, with added network visualization and content analysis…”
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Synthesis and Characterization of Amorphous SiO2−FexOy Materials Starting from Iron Sulfate for Preliminary Studies of CO2 Adsorption by Ianăşi, Cătălin, Pascu, Bogdan, Nemeş, Nicoleta, Popa, Alexandru

“…The goal of this work is to investigate the effectiveness of amorphous SiO2−FexOy loaded by functionalization with Ce(SO4)2, Li2SO4, and…”
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Fixed Parameter Algorithms and Hardness of Approximation Results for the Structural Target Controllability Problem by Czeizler, Eugen, Popa, Alexandru, Popescu, Victor

“…Recent research has revealed new and unexpected applications of network control science within biomedicine, pharmacology, and medical therapeutics. These new…”
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Adsorbent Material Based on Carbon Black and Bismuth with Tunable Properties for Gold Recovery by Ianăşi, Cătălin, Svera M Ianăşi, Paula, Popa, Alexandru, Lazău, Radu, Negrea, Adina, Negrea, Petru, Duteanu, Narcis, Ciopec, Mihaela, Nemes, Nicoleta-Sorina

“…Adsorption recovery of precious metals on a variety of solid substrates has steadily gained increased attention in recent years. Special attention was paid to…”
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Thermogravimetry Applied for Investigation of Coke Formation in Ethanol Conversion over Heteropoly Tungstate Catalysts by Orsina Verdeş, Alexandru Popa, Silvana Borcănescu, Mariana Suba, Viorel Sasca

“…Thermogravimetric analysis (TGA) was used to evaluate the thermal stability and the amount of coke deposition resulting from the deactivation of catalysts…”
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