Transparent electrodes based on silver nanowire networks: physical properties and potential applications
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The Behaviour of Recycled Material with Particles of Various Sizes of Polyamide 6 to Micro Hardness
Every manufacture of any plastic parts produces some waste, such as defective injects or cold runner system from injection molding technology. This waste can be directly used several times. But when size of this material is reduced, particles of different sizes are made. From large particles similar to the original gr…
Influence of Plasma Treatment on the Surface Properties and Strength of Bonded Joints at Selected Polyolefins
Bonding has experienced an enormous expansion in the various applications during the last few years in the field of material joining, due to which it is classified as a new joining technology, although it is, in fact, very old. Compared with the conventional joining methods (riveting, screwing and welding), bonding pr…
Generation of Nanoscale Stripes at Failure of Amorphous Metals
We analyzed the failure characteristics of the metallic glass Co43Fe20Ta5.5B31.5 (at.%) deformed in bending. The nanoscale fracture surface morphology respects the micromechanisms of the failure of the amorphous structure. The fracture surfaces consist of nanosized dimples (40 nm) arranged in the lines respecting the…
The Surface Free Energy after Laser Beam Treatment
Recently the laser beam treatment is more and more in common practice. The fields of use are very diverse. One of these fields of activity is removing of pollutions from a surface and preparation of it before the next stage of treatment. In the paper are presented the results of experimental research which were conduc…
Enhancing Resistance of Cables to Hydrocarbons
An aging in hydrocarbon fluids (the transformer oil and diesel fuel) of cables with sheaths produced of polymers having different resistance to swelling and using different extruders has been carried out. While the aging resistance of cables is mainly determined by the resistance of its polymer sheath to the swelling,…
OPTIMIZATION OF SELECTIVE-TYPE AFTERTREATMENT SYSTEMS IN DIESEL ENGINES
Diesel engine technology has been driven by stringent regulation. To fulfill this demands emission control systems are constantly improving. In this context exhaust gas aftertreatment development assumes an important role however the in-cylinder emissions control is fundamental to comply with future legislations.
Investigation of Defect Formation Process in Transmission and Distribution Equipment
The results of the statistical investigation of defect formation process in the equipment of electric networks are shown. Probabilistic characteristics of the stochastic process of the growing defects formation are determined for the 6/0.4 kV transformers with a high degree of confidence. The results will be used in t…
Improvement of Electrical Insulating and Anti-Wear Properties of Composites Used in Telemetry Systems
This article deals with the research results of electroinsulated and tribotechnical properties of composite materials on the basis of epoxide resin. The effect of fillers — micro-and nanopowders of various materials - on the properties of composites is examined. The use of composites in the manufacture of separators f…
에틸렌-프로필렌-디엔-모노머/불소고무 블렌드의 상 모폴로지와 기계적 물성
에틸렌-프로필렌-디엔-모노머(EPDM) 고무와 불소고무(FKM)를 다양한 조성으로 블렌드를 제조하여 조성에 따른 상 모폴로지와 가교특성, 경도특성, 인장특성 그리고 동적 점탄성 특성을 조사하였다. FKM 함량이 증가할수록 가교속도는 증가한 반면 가교밀도는 감소하였으며, 전반적으로 경도, 인장강도, 파단신장률 및 저장 모듈러스(E) 는 증가하였다. 모든 블렌드 컴파운드에서 EPDM과 FKM 고유의 유리전이온도(T g )를 나타내고 있어, 전형적인 비혼화성 블렌드 거동을 보였다. 전자현미경(SEM)과 원소분석장치(EDS)를 이용하여 상 거동을 관찰한 결과 EPDM/FK…
Wear and Mechanical Properties of Various Bone Cements – Influence of Saline Environment
Several bone cements were prepared in two ways of mixing (manual and vacuum bowl). Wear behavior, friction coefficient were studied by ball on disc method. Nano-hardness and Young`s modulus was studied by instrumented indentation. Obtained results were summarized by taking into account their way preparation, antibioti…
Optical Recording of Bubble Dissolution of Diagnostic Gases in Electrical Insulating Liquids
The diffusion coefficients of the basic diagnostic gases were determined by optical recording of the bubble dissolving dynamics in degassed insulating liquid. It is necessary to understand the diffusion of diagnostic gases in insulating liquids for obtaining high-quality diagnostic conclusions obtained during the anal…
Microstructure Prediction by Finite Element Analysis during Hot Rolling of Magnesium Alloy Sheets
Material’s plastic deformation by hot forming processes can be used to make the materials generate dynamic recrystallization (DRX) and fine grains and accordingly products with more excellent mechanical properties, such as higher strength and larger elongation can be obtained. In this study, compression tests and wate…
Non-Destructive Analysis of Surfaces after Hard Milling Based on Barkhausen Noise Technique
This paper deals with the non-destructive evaluation of surface made of hardened roll bearing steel after hard milling via Barkhausen noise technique. The paper discusses magnetic anisotropy linked with the structure transformations with regard to variable flank wear of cutting tool. Effective value of Barkhausen nois…
Estimation of the Plastic Zone Size from the Multi-Parameter/Generalized Form of Fracture Criteria on Various Mode I Geometries
Three cracked geometries loaded in mode I are investigated and the plastic zone size calculated. For estimation of the plastic zone size, two fracture criteria are used (Rankine and von Mises). Whereas the classical criteria give the same results (the stress intensity factor being identical for each geometry), the dat…
Calculation on the Ion Flow Field under HVDC Transmission Lines Considering Wind Effects
Based on Deutsch assumption, a calculation method on the electric field over the ground surface under HVDC transmission lines in the wind is proposed. Analyzing the wind effects on the electric field and the space charge density the existing method based on Deutsch assumption is improved through adding the wind speed…
Proposta de emprego de conceitos de equilíbrio químico na descrição matemática da câmara de combustão de caldeira siderúrgica
A queima de um combustível na câmara de combustão na presença de ar gera vapor, cinzas e gases de exaustão. A determinação da composição de saída das cinzas e dos gases de exaustão é de extrema importância ambiental e econômica para uma empresa. A descrição fenomenológica deste processo pode ser realizada empregando-s…
group_degree_centralization: The initial version
A home of Python version of the efficient approximation for Freeman centralization of group centrality. A working package SNAP.py must be installed on a system in order to run the file.
Switching Converters Development Systems for Electrostart Diesel Engine Start
The article presents the research aimed at improving the efficiency of the diesel engines running. The advantages and disadvantages of the existing systems of the starter starting systems of diesel locomotives are considered. Brainstorming ideas on the issue of the calculation and selection of the alternative circuitr…
3D-Shaping of Ceramic Tapes to Manufacture a High-Temperature Miniaturized Furnace
This contribution shows results of 3D-shaping experiments of ceramic tapes. The structures were made by wrapping structured tapes around a hexagonal alumina rod. After lamination, the rod was removed and the structure was finally fired, similarly as reported in [1]. One out of many possible applications of such struct…