scholarly journals Sterically Stabilized Multilayer Graphene Nanoshells for Inkjet Printed Resistors

2021 ◽  
Vol 2 (3) ◽  
pp. 394-412
Author(s):  
Michael Orrill ◽  
Dustin Abele ◽  
Michael J. Wagner ◽  
Saniya LeBlanc
Keyword(s):  
Printed Electronics ◽  
Geometric Model ◽  
Multilayer Graphene ◽  
Carbon Nanomaterial ◽  
Post Process ◽  
Analysis Technique ◽  
Adsorption Analysis ◽  
Interparticle Potentials ◽  
The Stability ◽  
Printed Patterns

In the field of printed electronics, there is a pressing need for printable resistors, particularly ones where the resistance can be varied without changing the size of the resistor. This work presents ink synthesis and printing results for variable resistance, inkjet-printed patterns of a novel and sustainable carbon nanomaterial—multilayer graphene nanoshells. Dispersed multilayer graphene nanospheres are sterically stabilized by a surfactant (Triton X100), and no post-process is required to achieve the resistive functionality. A surface tension-based adsorption analysis technique is used to determine the optimal surfactant dosage, and a geometric model explains the conformation of adsorbed surfactant molecules. The energetic interparticle potentials between approaching particles are modeled to assess and compare the stability of sterically and electrostatically stabilized multilayer graphene nanoshells. The multilayer graphene nanoshell inks presented here show a promising new pathway toward sustainable and practical printed resistors that achieve variable resistances within a constant areal footprint without post-processing.

NPLs — The Solution Recipe for Albania

2015 ◽  
Vol 3 (1) ◽  
pp. 48
Author(s):  
Elona Shehu ◽  
Elona Meka
Keyword(s):  
Interest Rate ◽  
Negative Relationship ◽  
Banking System ◽  
Gdp Growth ◽  
System A ◽  
Analysis Technique ◽  
Recent Financial Crisis ◽  
The Stability ◽  
Asset Quality ◽  
Macroeconomic Determinants

The quality of the loan portfolio in Albanian banking system is facing many obstacles during the last decade. In this paper we look at possible determinants of assets quality. During the recent financial crisis commercial banks were confronted with deteriorating asset quality that threatened not only the banking industry, but also the stability of the entire financial system. This study aims to examine the correlation between non-performing loans and the macroeconomic determinants in Albania during the last decade. NPLs are considered to be of a high importance as they represent the high risk exposure of banking system. A solid bank with healthy assets increases the market efficiency. Our approach is based on a panel data regression analysis technique from 2005-2015. Within this methodology this study finds robust evidence on the existing relationship between lending interest rate, real GDP growth and NPLs. We expect to find a negative relationship between lending interest rate and asset quality. Further we assume an inverse relationship between GDP growth and non-performing loans, suggesting that NPLs decrease if the economy is growing. Furthermore this study proposes a solution platform, which looks deeper into the possibility of creating a secondary active market for troubled loans, restructuring the banking system or implementing the Podgorica model. This research paper opens a new lieu of discussion in terms of academic debates and decision-making policies.

Synthesis, characterization, and computational study of copper bipyridine complex [Cu (C18H24N2) (NO3)2] to explore its functional properties

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Saleh S. Alarfaji ◽  
Sajjad Hussain ◽  
Abdullah G. Al-Sehemi ◽  
Shabbir Muhammad ◽  
Islam Ullah Khan ◽  
...  
Keyword(s):  
Computational Study ◽  
Coordination Complexes ◽  
Mononuclear Complex ◽  
Orthorhombic Space Group ◽  
Main Protease ◽  
Analysis Technique ◽  
Infra Red ◽  
Chemical Techniques ◽  
The Stability ◽  
Single Crystal Analysis

Abstract In the present study, copper (II) complex of 4, 4′-di-tert-butyl-2,2′-bipyridine [Cu (C18H24N2) (NO3)2], 1 is investigated through its synthesis and characterization using elemental analysis technique, infra-red spectroscopy, and single-crystal analysis. The compound 1 crystallizes in orthorhombic space group P212121. The copper atom in the mononuclear complex is hexa coordinated through two nitrogen and four oxygen atoms from bipyridine ligand and nitrate ligands. The thermal analysis depicts the stability of the entitled compound up to 170 °C, and the decomposition takes place in different steps between 170 and 1000 °C. Furthermore, quantum chemical techniques are used to study optoelectronic, nonlinear optical, and therapeutic bioactivity. The values of isotropic and anisotropic linear polarizabilities of compound 1 are calculated as 41.65 × 10−24 and 23.02 × 10−24 esu, respectively. Likewise, the static hyperpolarizability is calculated as 47.92 × 10−36 esu using M06 functional compared with para-nitroaniline (p-NA) and found several times larger than p-NA. Furthermore, the antiviral potential of compound 1 is studied using molecular docking technique where intermolecular interactions are checked between the entitled compound and two crucial proteins of SARS-CoV-2 (COVID-19). Our investigation indicated that compound 1 interacts more vigorously to spike protein than main protease (MPro) due to its better binding energy of −9.60 kcal/mol compared with −9.10 kcal/mol of MPro. Our current study anticipated that the above-entitled coordination complexes could be potential candidates for optoelectronic properties and their biological activity.

scholarly journals The effect of plasma functionalization on the print performance and time stability of graphite nanoplatelet electrically conducting inks

2020 ◽  
Author(s):  
Andrew Claypole ◽  
James Claypole ◽  
Tim Claypole ◽  
David Gethin ◽  
Liam Kilduff
Keyword(s):  
Printed Electronics ◽  
Low Cost ◽  
Electrical Performance ◽  
Graphite Nanoplatelets ◽  
Interparticle Interactions ◽  
Electrically Conducting ◽  
Wide Range ◽  
Oscillatory Rheology ◽  
The Stability ◽  
Plasma Functionalization

Abstract Carbon-based pastes and inks are used extensively in a wide range of printed electronics because of their widespread availability, electrical conductivity and low cost. Overcoming the inherent tendency of the nano-carbon to agglomerate to form a stable dispersion is necessary if these inks are to be taken from the lab scale to industrial production. Plasma functionalization of graphite nanoplatelets (GNP) adds functional groups to their surface to improve their interaction with the polymer resin. This offers an attractive method to overcome these problems when creating next generation inks. Both dynamic and oscillatory rheology were used to evaluate the stability of inks made with different loadings of functionalized and unfunctionalized GNP in a thin resin, typical of a production ink. The rheology and the printability tests showed the same level of dispersion and electrical performance had been achieved with both functionalized and unfunctionalized GNPs. The unfunctionalized GNPs agglomerate to form larger, lower aspect particles, reducing interparticle interactions and particle–medium interactions. Over a 12-week period, the viscosity, shear thinning behavior and viscoelastic properties of the unfunctionalized GNP inks fell, with decreases in viscosity at 1.17 s−1 of 24, 30, 39% for the ϕ = 0.071, 0.098, 0.127 GNP suspensions, respectively. However, the rheological properties of the functionalized GNP suspensions remained stable as the GNPs interacted better with the polymer in the resin to create a steric barrier which prevented the GNPs from approaching close enough for van der Waals forces to be effective.

Comparison Between Linear and Nonlinear Transient Analysis Techniques to Find the Stability of a Rigid Rotor

1999 ◽  
Vol 121 (1) ◽  
pp. 198-201 ◽  
Author(s):  
Ram Turaga ◽  
A. S. Sekhar ◽  
B. C. Majumdar
Keyword(s):  
Transient Analysis ◽  
Stability Limit ◽  
Journal Bearings ◽  
Quantitative Comparison ◽  
Rigid Rotor ◽  
Analysis Techniques ◽  
Analysis Technique ◽  
Nonlinear Transient ◽  
Nonlinear Transient Analysis ◽  
The Stability

The subsynchronous whirl stability limit of a rigid rotor supported on two symmetrical finite journal bearings has been studied using the linearised perturbation method and the nonlinear transient analysis technique. A quantitative comparison for journal bearings with different l/d ratios has been provided.

scholarly journals On-Machine Measurement for Surface Flatness of Transparent and Thin Film in Laser Ablation Process

Coatings ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 885
Author(s):  
HyungTae Kim ◽  
Yoon Jae Moon ◽  
Heuiseok Kang ◽  
Jun Yong Hwang
Keyword(s):  
Thin Film ◽  
Laser Ablation ◽  
Printed Electronics ◽  
Film Surface ◽  
Large Area ◽  
Laser Ablation Process ◽  
Laser Focusing ◽  
Surface Flatness ◽  
Continuous Surface ◽  
Printed Patterns

In printed electronics, laser ablation is used to repair defective patterns on transparent, flexible, and thin films, using high-power lasers. The distance between the film surface and laser focus is sensitive to changes as the narrow focus depth of the lens is the range of tens of microns. However, a film fixed on a conductive vacuum chuck (CVC) is always curved, owing to chucking bending; thus, laser focusing must be locally performed before ablation. Therefore, this study proposes a non-contact measurement method for the surface flatness of a transparent and thin film, to compensate for laser defocusing in a large area. The surface flatness was obtained using camera-focus points on the porous surface of the CVC. The focus points were interpolated to achieve a smooth and continuous surface flatness for chucking bending. A laser distance sensor was used to verify the surface flatness from the proposed method. The surface flatness was used to inspect the printed patterns, and to perform laser ablation on the film. The proposed method is advantageous for large-area laser ablation and is expected to become indispensable for repairing machines in printed electronics.

THE ELASTIC THEORY OF A SINGLE DNA MOLECULE

2003 ◽  
Vol 17 (01) ◽  
pp. 1-10 ◽  
Author(s):  
Z.-C. OU-YANG ◽  
H. ZHOU ◽  
Y. ZHANG
Keyword(s):  
Base Pair ◽  
Geometric Model ◽  
Repulsive Interaction ◽  
Entropic Elasticity ◽  
Integral Methods ◽  
Mc Simulation ◽  
The Stability ◽  
Base Pair Stacking ◽  
High Deformability ◽  
Single Dna Molecule

We review our recent efforts in understanding the elastic properties of double-stranded (ds) and single-stranded (ss) DNA macromolecules. A simple geometric model of dsDNA was constructed and solved by path integral methods. The good agreement with experiments on dsDNA's entropic elasticity, cooperative extensibility, and supercoiling property suggested that the short-ranged base-pair stacking interaction is crucial for the stability and the high deformability of dsDNA. For ssDNA at high ionic conditions, base-pairing and base-pair stacking interactions cause the polymer to fold into compact hairpin configurations. The force-induced hairpin-coil transition was studied with the generating function method. In accordance with experiment, this transition was found to be highly cooperative when the average stacking potential is higher than some critical level. At low ionic conditions, the electrostatic repulsive interaction along the ssDNA becomes dominant, and ssDNA can be regarded as model polyelectrolytes. Our MC simulation results suggested an exponential relation between external force and the total extension. This prediction was confirmed experimentally.

scholarly journals KAJIAN PENGEMBANGAN KLASTER KOMODITAS BAWANG MERAH DI KANTOR PERWAKILAN BANK INDONESIA TEGAL

2020 ◽  
Vol 7 (2) ◽  
pp. 153-162
Author(s):  
Anis Solekha ◽  
Andri Widianto ◽  
Anita Karunia
Keyword(s):  
Data Analysis ◽  
Literature Study ◽  
Cluster Development ◽  
Analysis Technique ◽  
Fishbone Diagram ◽  
Representative Office ◽  
The Republic ◽  
Commodity Clusters ◽  
The Stability ◽  
Diagram Analysis

Bank Indonesia (BI) is the Central Bank of the Republic of Indonesia which is responsible for achieving and maintaining the stability of the rupiah value, such as maintaining the stability of volatile food. Volatile food can be maintain using cluster development, one of them is the shallot commodity cluster. This study aimed to determine the development of shallot commodity clusters in the context of controlling inflation at the Tegal Bank Indonesia Representative Office. Data collection techniques used were observation, interviews, and literature study. The data analysis technique used is descriptive qualitative analysis through a fishbone diagram instrument. The results of the fishbone diagram analysis showed the factors that influence the shallot commodity on inflation control in Brebes Regency are farmers, upstream factors, environmental factors, and downstream factors. Shallot is the main contributor to inflation in Brebes district, in 2016 these commodities contributed to inflation by 0.33%, in 2017-2019 commodities contributed to deflation of -0.26%, -0.22274% and -0.0883%. The conclusion is the development of shallot commodity cluster in the context of controlling inflation in the Tegal Bank Indonesia Representative Office using a fishbone diagram instrument considered to be good enough.

Velocity Workspaces of the Normal Human Knee

2009 ◽  
Author(s):  
J. E. Fuller ◽  
G. A. Brown ◽  
M. C. Murphy
Keyword(s):  
Rigid Body ◽  
Cross Sections ◽  
Geometric Model ◽  
General Description ◽  
Main Function ◽  
Human Knee ◽  
Analysis Technique ◽  
Joint Biomechanics ◽  
Insight Into

The human knee is a joint in the musculoskeletal system, and as such, its main function is to allow motion between the thigh and shank of the human lower limb. The development of an analysis technique that, given a set of constraints, maps out all possible knee motions, could offer much information and insight into studies of knee biomechanics. The study of the kinematics of the human knee is one discipline where the construction of this type of information could provide new perspectives on old problems, meaningful information on current questions, and possible direction to future work. Once a geometric model has been developed, the natural place to begin with respect to kinematic analysis is position analysis. The construction of all possible positions and orientations one rigid body may assume relative to some other rigid body is a general description of what displacement workspace analyses attempt to accomplish. It is highly probable that information useful to the study of the biomechanics of the human knee is inherently contained within workspace analyses based on the constraint systems of the joint. Investigation of a relatively simple model, including representations for constraints dictated by the four major ligaments, gives insight into many aspects of the joint biomechanics. For example, the addition and exclusion of ligaments to a workspace model showed noticeable changes in the shape, geometry and size of the two dimensional cross-sections of the displacement workspace. Such information may allow investigators to develop strategies for affecting the allowable displacements and trajectories in similarly constrained joints, in vivo (Fuller, et al., 2000).

scholarly journals ANALISIS KINERJA KEUANGAN DENGAN METODE RADAR PADA PT SEMEN BATURAJA (PERSERO) TBK

2019 ◽  
pp. 1023
Author(s):  
Siska Mardiana ◽  
R. Deni Muhammad Danial ◽  
Erry Sunarya
Keyword(s):  
Financial Performance ◽  
Quantitative Data ◽  
Research Method ◽  
Stock Exchange ◽  
Growth Potential ◽  
Financial Statement ◽  
Stability Ratio ◽  
Analysis Technique ◽  
The Stability ◽  
Productivity Ratio

The purpose of this study is to assess the financial performance of PT Semen Baturaja (Persero) Tbk by comparing the performance of PT Semen Baturaja (Persero) Tbk in several similar companies that have been listed on the Indonesia Stock Exchange. The data used are financial statement data of PT Indocement Tunggal Prakarsa Tbk, PT Semen Baturaja Persero Tbk and PT Holcim Indonesia Tbk for the period 2015-2017. The research method used is descriptive with quantitative data. The analysis technique used with the radar method. Radar analysis includes 5 ratios, namely profitability, productivity, asset utility, stability and growth potential. The results showed that the best profitability ratio of PT Semen Baturaja (Persero) Tbk,  from the best productivity ratio of PT Holcim Indonesia Tbk, was seen from the best utility ratio of PT Indocement Tunggal Prakarsa Tbk, on the stability ratio of PT Holcim Indonesia Tbk and on the best growth potential of PT Semen Baturaja (Persero) Tbk.

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