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Antal Dér,Alexander Kaluza,Lars Reimer,Christoph Herrmann,Sebastian Thiede 한국정밀공학회 2022 International Journal of Precision Engineering and Vol.9 No.3
Recent years introduced process and material innovations in the design and manufacturing of lightweight body parts for larger scale manufacturing. However, lightweight materials and new manufacturing technologies often carry a higher environmental burden in earlier life cycle stages. The prospective life cycle evaluation of lightweight body parts remains to this day a challenging task. Yet, a functioning evaluation approach in early design stages is the prerequisite for integrating assessment results in engineering processes and thus allowing for a life cycle oriented decision making. The current paper aims to contribute to the goal of a prospective life cycle evaluation of fiber-reinforced lightweight body parts by improving models that enable to predict energy and material flows in the manufacturing stage. To this end, a modeling and simulation approach has been developed that integrates bottom-up process models into a process chain model. The approach is exemplarily applied on a case study of a door concept. In particular, the energy intensity of compression molding of glass fiber and carbon fiber sheet molding compounds has been analyzed and compared over the life cycle with a steel reference part.
COMMON FIXED POINT FOR GENERALIZED MULTIVALUED MAPPINGS VIA SIMULATION FUNCTION IN METRIC SPACES
Antal, Swati,Gairola, U.C. Korean Mathematical Society 2020 대한수학회논문집 Vol.35 No.4
The purpose of this paper is to introduce the notion of generalized multivalued Ƶ-contraction and generalized multivalued Suzuki type Ƶ-contraction for pair of mappings and establish common fixed point theorems for such mappings in complete metric spaces. Results obtained in this paper extend and generalize some well known fixed point results of the literature. We deduce some corollaries from our main result and provide examples in support of our results.
Certain aspects of rough ideal statistical convergence on neutrosophic normed spaces
Reena Antal,Meenakshi Chawla,Vijay Kumar 강원경기수학회 2024 한국수학논문집 Vol.32 No.1
In this paper, we have presented rough ideal statistical convergence of sequence on neutrosophic normed spaces as a significant convergence criterion. As neutrosophication can handle partially dependent components, partially independent components and even independent components involved in real-world problems. By examining some properties related to rough ideal convergence in these spaces we have established some equivalent conditions on the set of ideal statistical limit points for rough ideal statistically convergent sequences.
Koó,s, Antal A.,Vancsó,, Pé,ter,Magda, Gá,bor Z.,Osvá,th, Zoltá,n,Kerté,sz, Krisztiá,n,Dobrik, Gergely,Hwang, Chanyong,Tapasztó,, Levente,Bir&oacu Elsevier 2016 Carbon Vol.105 No.-
<P>Heterostructures of 2D materials are expected to become building blocks of next generation nanoelectronic devices. Therefore, the detailed understanding of their interfaces is of particular importance. In order to gain information on the properties of the graphene - MoS2 system, we have investigated MoS2 sheets grown by chemical vapour deposition (CVD) on highly ordered pyrolytic graphite (HOPG) as a model system with atomically clean interface. The results are compared with results reported recently for MoS2 grown on epitaxial graphene on SiC. Our STM study revealed that the crystallographic orientation of MoS2 sheets is determined by the orientation of the underlying graphite lattice. This epitaxial orientation preference is so strong that the MoS2 flakes could be moved on HOPG with the STM tip over large distances without rotation. The electronic properties of the MoS2 flakes have been investigated using tunneling spectroscopy. A significant modification of the electronic structure has been revealed at flake edges and grain boundaries. These features are expected to have an important influence on the performance of nanoelectronic devices. We have also demonstrated the ability of the STM to define MoS2 nanoribbons down to 12 nm width, which can be used as building blocks for future nanoelectronic devices. (C) 2016 Elsevier Ltd. All rights reserved.</P>
Orosz, Erzsé,bet,Antal, Ká,roly,Gazdag, Zoltá,n,Szabó,, Zsuzsa,Han, Kap-Hoon,Yu, Jae-Hyuk,Pó,csi, Istvá,n,Emri, Tamá,s Hindawi 2017 International journal of genomics Vol.2017 No.-
<P>To better understand the molecular functions of the master stress-response regulator AtfA in <I>Aspergillus nidulans</I>, transcriptomic analyses of the <I>atfA</I> null mutant and the appropriate control strains exposed to menadione sodium bisulfite- (MSB-), <I>t</I>-butylhydroperoxide- and diamide-induced oxidative stresses were performed. Several elements of oxidative stress response were differentially expressed. Many of them, including the downregulation of the mitotic cell cycle, as the MSB stress-specific upregulation of FeS cluster assembly and the MSB stress-specific downregulation of nitrate reduction, tricarboxylic acid cycle, and ER to Golgi vesicle-mediated transport, showed AtfA dependence. To elucidate the potential global regulatory role of AtfA governing expression of a high number of genes with very versatile biological functions, we devised a model based on the comprehensive transcriptomic data. Our model suggests that an important function of AtfA is to modulate the transduction of stress signals. Although it may regulate directly only a limited number of genes, these include elements of the signaling network, for example, members of the two-component signal transduction systems. AtfA acts in a stress-specific manner, which may increase further the number and diversity of AtfA-dependent genes. Our model sheds light on the versatility of the physiological functions of AtfA and its orthologs in fungi.</P>
Are frailty scales better than anesthesia or surgical scales to determine risk in cardiac surgery?
Judit Kovacs,Liviu Moraru,Krisztina Antal,Adrian Cioc,Septimiu Voidazan,Attila Szabo 대한마취통증의학회 2017 Korean Journal of Anesthesiology Vol.70 No.2
Background: In the last year there has been an increasing interest for using frailty scales for risk stratification of elderly patients undergoing major surgery. We planned to compare two frailty scales with risk scales already used in cardiac surgery, to study which of these scores have better prognostic value predicting postoperative outcome in open heart surgery. Methods: We conducted a prospective clinical trial, including 57 patients over 65 years. We calculated Cardiac Anesthesia Risk Evaluation score, EuroScore II, Clinical Frailty Scale, Edmonton Frail Scale for each patient and followed the postoperative complications, length of mechanical ventilation, length of stay in the intensive care unit and hospital, and in-hospital death related to these risk and frailty scores. Results: Postoperative complications occurred in 25 patients (43.9%), while four patients (7%) died with multiple organ failure. All scales had low predictability for postoperative complications, but for length of mechanical ventilation we obtained positive correlations with EuroScore II, Edmonton Frail Scale and Clinical Frailty Scale. EuroScore II can also predict the length of stay in the intensive care unit. For postoperative deaths, the highest sensitivity had EuroScore II, followed by Clinical Frailty Scale and Edmonton Frail Scale. Conclusions: EuroScore II and the frailty scales have an increased prognostic value regarding the postoperative outcome of patients (length of mechanical ventilation and in-hospital mortality), the EuroScore II can predict the length of stay in the intensive care unit as well.
Wet air oxidation of paracetamol over precious metal/Ti mesh monolith catalyst
Erika Szabados,Gyuri Sági,Ferenc Somodi,Boglárka Maróti,Dávid Srankó,Antal Tungler 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.46 No.-
The catalytic wet oxidation of paracetamol (PAR) was tested with Pt, Ru, Ir containing Ti monolithsmeasuring COD, TOC and TN conversion and compared with that of the non-catalytic reaction. Thedecrease of PAR concentration during reaction was followed by UV–vis spectrometry also. The catalystswere characterized by XPS, PGAA, TPR and SEM-EDX. The monometallic Pt and Ru/Ti catalysts were themost active, even below 150 C. RuO2/Ti had the highest specific activity. After 100 h reaction time the Ptloss was 23%, while the RuO2/Ti kept its Ru content. The RuO2/TiO2 composite formation explains thehighest activity and stability.