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Helium Plasma Effects on Polymer Surfaces:from Plasma Parameters and Surface Properties towards Bioengineering Applications

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Chinese Journal of Polymer Science 2024年第8期42卷 1156-1166页

作者： Andrei Vasile Nastuta Maria Butnaru Byron Cheatham Ramona Huzum Vasile Tiron Ionut Topala Physics and Biophysics Education Research Laboratory(P&B-EduResLab) Biomedical Science DepartmentFaculty of Medical Bioengineering‘Grigore T.Popa’University of Medicine and Pharmacy IasiM.Kogalniceanu 9-13Iasi 700454Romania Faculty of Medical Bioengineering ‘Grigore T.Popa’University of Medicine and Pharmacy IasiM.Kogalniceanu 9-13Iasi 700454Romania Cytoviva Inc.570 Devall Drive Suite 301Auburn 36832ALUSA Integrated Center of Environmental Science Studies in the North-Eastern Development Region(CERNESIM) Department of Exact and Natural SciencesInstitute of Interdisciplinary Research‘Alexandru Ioan Cuza’University of IasiBlvd.Carol I no.11Iasi 700506Romania Research Center on Advanced Materials and Technologies(RAMTECH) Department of Exact and Natural SciencesInstitute of Interdisciplinary Research‘Alexandru Ioan Cuza’University of IasiBlvd.Carol I no.11Iasi 700506Romania iasi Plasma Advanced Research Center(IPARC) Faculty of Physics‘Alexandru Ioan Cuza’University of IasiBlvd.Carol I no.11Iasi 700506Romania

Plasma treatment is necessary to optimize the performance of biomaterial *** enhances and regulates the performance of biomaterial su rfaces,creating an effective interface with the human *** treatments have the ability to modify the chemical com position and physical structu re of a surface while leaving its properties *** possess the ability to modify material su rfaces,eliminate contaminants,conduct investigations on cancer therapy,and facilitate wound *** subject of study in question involves the integration of plasma science and technology with biology and *** a helium plasma jet source,applying up to 18 kV,with an average power of 10 W,polymer foils were treated for 60 *** treatment has the ability to alter the chemical composition and physical structure of a su rface while maintaining its *** investigation involved the application of helium plasma at atmospheric pressure to polyamide 6 and polyethylene terephthalate *** inquiry involves monitoring and assessing the plasma source and polymer materials,as well as analyzing the impacts of plasma *** the mean power of the discharge aids in assessing the economic efficacy of the plasma *** discharge in helium at atmospheric pressure has beneficial effects in technology,where it increases the surface free energy of polymer *** biomedicine,it is used to investigate cytotoxicity and cell survival,particularly in direct blood exposure situations that can expedite *** the specific parameters that influence the plasma source in the desired manner for the intended application is of utmost im portance.

关键词： Atmopheric pressure plasmas Plasma-polymer interaction Plasma Medicine Plasma diagnosis Polymer characterization

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The Subscription Economy and Its Contribution to the Global Economy

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Management Studies 2024年第3期12卷 137-145页

作者： Paula Cobzaru alexandru Tugui “alexandru ioan cuza”university of iasi Romania

The subscription economy has become a dominant influence in the current business environment,fundamentally transforming the manner in which organizations interact with customers and create *** article examines the substantial influence of the subscription economy on the worldwide economy,evaluating its effects on different industries and *** research examines relevant literature and case studies to identify the main factors,difficulties,and possibilities related to the subscription ***,its objective is to examine the consequences for firms,customers,and economic expansion,elucidating the possibility of continuous value generation and innovation.

关键词： subscription model subscription economy business model shift new digital economy global economy

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Size-dependent thermal stresses in the core–shell nanoparticles

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Chinese Physics B 2013年第12期22卷 483-490页

作者： Astefanoaei I Dumitru I Stancu Al Faculty of Physics "Alexandru Ioan Cuza" University of Iasi

The thermal stress in a magnetic core–shell nanoparticle during a thermal process is an important parameter to be known and controlled in the magnetization process of the core–shell system. In this paper we analyze the stress that appears in a core–shell nanoparticle subjected to a cooling process. The external surface temperature of the system, considered in equilibrium at room temperature, is instantly reduced to a target temperature. The thermal evolution of the system in time and the induced stress are studied using an analytical model based on a time-dependent heat conduction equation and a differential displacement equation in the formalism of elastic displacements. The source of internal stress is the difference in contraction between core and shell materials due to the temperature change. The thermal stress decreases in time and is minimized when the system reaches the thermal equilibrium. The radial and azimuthal stress components depend on system geometry, material properties, and initial and final temperatures. The magnitude of the stress changes the magnetic state of the core–shell system. For some materials, the values of the thermal stresses are larger than their specific elastic limits and the materials begin to deform plastically in the cooling process. The presence of the induced anisotropy due to the plastic deformation modifies the magnetic domain structure and the magnetic behavior of the system.

关键词： thermal stresses thermal equilibrium core–shell particle

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The SO(3,1)-Gauge Invariant Approach to Fermions on Rindler Spacetime

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Chinese Physics Letters 2016年第2期33卷 1-4页

作者： Ciprian Dariescu Marina-Aura Dariescu Faculty of Physics Alexandru Ioan Cuza University of Iasi

We try to explicitly derive the Lorentz-gauge covariant Dirac equation, in terms of pseudo-orthonormal bases, on Rindler spacetime and to work out, with all the necessary coefficients, the respective closed-form solut... 详细信息

关键词： in with as of form Gauge Invariant Approach to Fermions on Rindler Spacetime The SO on

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Tunneling of Relativistic Bosons Induced by Magnetic Fields in the Magnetar’s Crust

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Chinese Physics Letters 2015年第10期32卷 26-29页

作者： Marina-Aura Dariescu Ciprian Dariescu Denisa-Andreea Mihu Faculty of Physics Alexandru Ioan Cuza University of Iasi Bd

The present work is devoted to the study of bosons evolving in the frozen magnetar＇s crust endowed with an ultra-strong magnetic field orthogonal to an electric field, both described by periodic functions. We discuss the quantum tunneling process through the one-dimensional potential barrier along Oz. The solutions to the Klein- Gordon equation are expressed in terms of Mathieu＇s functions which, for computable particle＇s energy range, are turning from oscillatory to exponentially growing modes along Oz. Within the Jeffreys Wentzel Kramers- Brillouin framework, the transmission coefficient is computed for the particle momentum in the middle of the instability range.

关键词： Tunneling of Relativistic Bosons Induced by Magnetic Fields in the Magnetar’s Crust

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An OWL-Based Specification of Database Management Systems

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Computers, Materials & Continua 2022年第3期70卷 5537-5550页

作者： Sabin C.Buraga Daniel Amariei Octavian Dospinescu alexandru ioan cuza university Faculty of Computer ScienceIasi700706Romania alexandru ioan cuza university Faculty of Economics and Business AdministrationIasi700706Romania

In the context of a proliferation of DatabaseManagement Systems(DBMSs),we have envisioned and produced an OWL 2 ontology able to provide a high-level machine-processable description of the DBMSs *** conceptualization aims to facilitate a proper execution of various software engineering processes and database-focused administration ***,it can be used to improve the decision-making process for determining/selecting the appropriate DBMS,subject to specific *** proposed model describes the most important features and aspects regarding the DBMS domain,including the support for various paradigms(relational,graph-based,key-value,tree-like,etc.),query languages,platforms(servers),plus running environments(desktop,Web,cloud),specific contexts—i.e.,focusing on optimizing queries,redundancy,security,performance,schema ***-less approaches,programming languages/paradigms,and *** process of populating the ontology with significant individuals(actual DBMSs)benefits from the existing knowledge exposed by free and open machine-processable knowledge bases,by using structured data fromWikipedia and related *** pragmatic use of our ontology is demonstrated by two educational software solutions based on current practices in Web application development,proving support for learning and experimenting key features of the actual semantic Web technologies and *** approach is also an example of using multiple knowledge from database systems,semanticWeb technologies,and software engineering areas.

关键词： Database management systems knowledge model web engineering

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A Knowledge-Based Pilot Study on Assessing the Music Influence

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Computers, Materials & Continua 2021年第3期66卷 2857-2873页

作者： Sabin C.Buraga Octavian Dospinescu Faculty of Computer Science University Alexandru Ioan CuzaIasi700706Romania Faculty of Economics and Business Administration University Alexandru Ioan CuzaIasi700706Romania

A knowledge-driven approach is proposed for assessing the music influence on university *** proposed method of modeling and conducting the interactive pilot study can be useful to convey other surveys,interviews,and experiments created in various phases of the user interface(UI)design processes,as part of a general human-computer interaction(HCI)*** from existing semantic Web and linked data standards,best practices,and tools,a microservice-oriented system is developed as a testbed platform able to generate playlists in a smart way according to users’music *** novel approach could bring also benefits for user interface adaptation by using semantic Web *** analysis based on the ANOVA method and post-experiment survey data led to the conclusion that music listened has a significant impact on students’cognitive abilities in various *** obtained results were semantically enhanced by using different conceptual models in order to create a knowledge graph providing support for automated ***,a knowledge-based persona Web smart editor was implemented in order to include music preferences for certain categories of the potential users operating a specific interactive system.

关键词： HCI knowledge conceptual model methodology music pilot study

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Assessment of recharge capacity potential of groundwater using comparative multi-criteria decision analysis approaches

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Journal of Geographical Sciences 2022年第4期32卷 735-756页

作者： Ionut MINEA Daniel BOICU Oana-Elena CHELARIU Marina IOSUB Andrei ENEA alexandru ioan cuza university of iasi RomaniaFaculty of Geography and Geology alexandru ioan cuza university of iasi RomaniaThe Institute of Interdisciplinary ResearchDepartment of Exact Sciences and Natural Sciences alexandru ioan cuza university of iasi Integrated Centre of Environmental Science Studies in the North Eastern Region-CERNESIM

Groundwater resources have always been some of the most valuable resources of human *** changes and ever-increasing water demands registered in the last century have led to diminishing levels of groundwater reserves,as well as reduced recharging ***,in order to use groundwater aquifers in a sustainable manner,it is required to identify areas with higher replenishing *** current study addresses the issue of generating a map for identifying differently ranked groundwater recharging potential values,in the aquifers of the Moldavian Plain region,*** the purpose of conducting the analysis,maps were created through GIS based multi-criteria Analytic Hierarchy Process(AHP)and Catastrophe Theory(CT),with seven relevant,thematic,spatial layers:precipitation distribution,lithological strata,soil texture,declivity,drainage density,land use and the distribution of groundwater level *** results of the two methods of analysis are *** differences are of maximum 3%,in the case of extreme classes(very bad and very good)and in the case of middle classes the deviation is not greater than 0.4%.Following the validation of the results generated by the two methods that were applied,it was observed that the predictions offered by CT are more *** aspect can be based on the fact that the main factors that contribute to the prediction are *** type of workflow emphasizes the necessity of implementing appropriate groundwater management plans for mitigating reservoir scarcity/depletion,and recommending sustainable solutions for future groundwater exploitation practices.

关键词： analytic hierarchy process catastrophe theory groundwater recharge potential groundwater vulnerability Innovative Trend Analysis

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A Comparative Analysis of Binary Logistic Regression and Analytical Hierarchy Process for Landslide Susceptibility Assessment in the Dobrovǎt River Basin,Romania

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Pedosphere 2016年第3期26卷 335-350页

作者： Cristian V.PATRICHE Radu PIRNAU Adrian GROZAVU Bogdan ROSCA Romanian Academy Department of IasiGeography Group "alexandru ioan cuza" university of iasi Faculty of Geography

A correct assessment of the landslide susceptibility component is extremely useful for the diminution of associated potential risks to local economic development, particularly in regard to land use planning and soil conservation. The purpose of the present study was to compare the usefulness of two methods, i.e., binary logistic regression(BLR) and analytical hierarchy process(AHP), for the assessment of landslide susceptibility over a 130-km^2 area in the Moldavian Plateau(eastern Romania) region, where landslides affect large areas and render them unsuitable for agriculture. A large scale inventory mapping of all types of landslides(covering 13.7% of the total area) was performed using orthophoto images, topographical maps, and field surveys. A geographic information system database was created, comprising the nine potential factors considered as most relevant for the landsliding process. Five factors(altitude, slope angle, slope aspect, surface lithology, and land use) were further selected for analysis through the application of a tolerance test and the stepwise filtering procedure of BLR. For each predictor, a corresponding raster layer was built and a dense grid of equally spaced points was generated, with an approximately equal number of points inside and outside the landslide area, in order to extract the values of the predictors from raster layers. Approximately half of the total number of points was used for model computation, while the other half was used for validation. Analytical hierarchy process was employed to derive factor weights, with several pair-wise comparison matrices being tested for this purpose. The class weights, on a scale of 0 to 1, were taken as normalized landslide densities. A comparison of results achieved through these two approaches showed that BLR was better suited for mapping landslide susceptibility, with 82.8% of the landslide area falling into the high and very high susceptibility classes. The susceptibility class separation u

关键词： Moldavian Plateau multivariate statistical method predictor weights receiver operating characteristic curve semiqualitative method

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An Advanced Analysis of Cloud Computing Concepts Based on the Computer Science Ontology

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Computers, Materials & Continua 2021年第3期66卷 2425-2443页

作者： PawełLula Octavian Dospinescu Daniel Homocianu Napoleon-alexandru Sireteanu Krakow university of Economics KrakowPoland alexandru ioan cuza university Iasi700706Romania

Our primary research hypothesis stands on a simple idea:The evolution of top-rated publications on a particular theme depends heavily on the progress and maturity of related *** this even when there are no clear relations or some concepts appear to cease to exist and leave place for newer ones starting many years *** implemented our model based on Computer Science Ontology(CSO)and analyzed 44 years of *** we derived the most important concepts related to Cloud Computing(CC)from the scientific collection offered by Clarivate *** methodology includes data extraction using advanced web crawling techniques,data preparation,statistical data analysis,and graphical *** obtained related concepts after aggregating the scores using the Jaccard coefficient and CSO *** article reveals the contribution of Cloud Computing topics in research papers in leading scientific journals and the relationships between the field of Cloud Computing and the interdependent subdivisions identified in the broader framework of Computer Science.

关键词： Cloud computing scientific literature cloud related concepts CSO ontology

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