scholarly journals Зарядка диэлектриков при бомбардировке ионами Ar-=SUP=-+-=/SUP=- средних энергий

2019 ◽  
Vol 61 (6) ◽  
pp. 1090
Author(s):  
К.Ф. Миннебаев ◽  
Э.И. Рау ◽  
А.А. Татаринцев
Keyword(s):  
High Voltage ◽  
Final Stage ◽  
Early Stage ◽  
Emission Characteristics ◽  
Research Project ◽  
Surface Potentials ◽  
Surface Charging ◽  
Reported Study ◽  
Ion Emission ◽  
Kinetics Of

A complex setup for measuring the kinetics of high-voltage potentials of bulk dielectrics charging under irradiated of ions Ar+ with medium energies has been created. Complex measurements of ion-emission characteristics, accumulated charges and surface charging potential showed effective charging to high positive potentials. The measured surface potentials is close in value to the potential of the ion gun. It is assumed that at the early stage of charging in the process of emission, sputtered ions dominate, and in the final stage of irradiation – backscattered. The reported study was funded by RFBR according to the research project № 18-02-00813A

On the effect of the periodicity of diagnostic measurements on improving the reliability of high-voltage transformers

2019 ◽  
Vol 12 (1) ◽  
pp. 18-21
Author(s):  
V. A. Tikhonov
Keyword(s):  
Service Life ◽  
High Voltage ◽  
Chromatographic Analysis ◽  
Aluminum Industry ◽  
Early Stage ◽  
Diagnostic Methods ◽  
Transformer Oil ◽  
Operating Voltage ◽  
Dissolved Gases ◽  
The Aluminum Industry

The influence of the periodicity of diagnostic measurements on the operational state of high-voltage transformers is considered. Examples of defects of switching devices of converter transformers and methods for their detection are given. The rationale for the importance of recognition of defects at an early stage of their occurrence is given. The influence of the multiplicity of overvoltages on the service life of converter transformers in the aluminum industry is investigated. Based on the analysis of the service life of converter transformers of one of the powerful aluminum plants, where 83% of converter transformers have exhausted their standard service life, it is shown that in 40% of cases it would be possible to avoid their failures, with timely detection and elimination of emerging defects. Examples of defects of OLR (on-load regulators) of converter transformers and methods for their detection are given. The importance of recognition of defects at an early stage of their occurrence is substantiated. A method for chromatographic analysis of dissolved gases in transformer oil has been developed for the qualitative determination of defects and ways to eliminate them. Examples of diagnostics of converter transformers at operating voltage and working load are given, providing the best quality operational characteristics of converter transformers. The periodicity of diagnostic measurements and the reduction of defects and failures has been substantiated. The question of diagnosing the state of the converter transformer TDNP-40000/10 at an enterprise of the aluminum industry is investigated. Currently, diagnostic methods are being developed based on chromatographic analysis of dissolved gases in transformer oil. The presented method of evaluating the operating parameters of transformers allows for the safe operation of high-voltage transformers and enables to increase the reliability of the power supply scheme of aluminum industry plants.

Final stage larvae and puparia of Platypezidae (Diptera)

2004 ◽  
Vol 35 (1) ◽  
pp. 79-105 ◽  
Author(s):  
Peter Chandler ◽  
Francis Gilbert ◽  
Graham Rotheray
Keyword(s):  
Phylogenetic Analysis ◽  
Final Stage ◽  
Abdominal Segment ◽  
Early Stage ◽  
Dorsal Surface ◽  
Uniform Pattern ◽  
Thoracic And Abdominal ◽  
Head Skeleton ◽  
Basal Position

AbstractPlatypezidae occupy an important basal position within the Muscomorpha. However, morphological analyses of larval Platypezidae are incomplete and early stage data is insufficient to inform phylogenetic analysis and recognition of groundplan characters and states within Muscomorpha. For example, knowledge is poor of the characters of respiratory organs, head, head skeleton, thorax and segmental sensilla. In this study we describe and compare these features of 16 species in 11 genera. The head appears as a distinct fleshy organ with atrium and antennae and maxillary organs separated on the dorsal surface. Head skeletons are characterised by an anteriorly projecting labrum and labium with laterally placed mandibles. The prothorax is frequently armoured with sclerotised regions and spicules. A repeated and uniform pattern of up to 11 pairs of sensilla circumvent each thoracic and abdominal segment. Respiratory organs vary little in size and arrangement of spiracular openings. Using a set of 43 larval and puparial characters and based on a Brachyceran outgroup, a sequence of genera is established which places Melanderomyia as the most basal. These results are compared with estimates of phylogeny based on adult characters.

Influence fast or later: two types of influencers in social networks

2021 ◽  
Author(s):  
Fang Zhou ◽  
Chang Su ◽  
Shuqi Xu ◽  
Linyuan Lü
Keyword(s):  
Final Stage ◽  
Early Stage ◽  
Large Fraction ◽  
Structure And Function ◽  
Spreading Process ◽  
Spreading Effect ◽  
Local Structures ◽  
Different Types ◽  
Small Set ◽  
And Function

Abstract In real-world networks, there usually exist a small set of nodes that play an important role in the structure and function of networks. Those vital nodes can influence most other nodes in the network via a spreading process. While most of the existing works focused on vital nodes that can maximize the spreading size in the final stage, which we call final influencers, recent work proposed the idea of fast influencers, which emphasizes nodes’ spreading capacity at the early stage. Despite the recent surge of efforts in identifying these two types of influencers in networks, there remained limited research on untangling the differences between fast influencers and final influencers. In this paper, we first distinguish the two types of influencers: fast-only influencers and final-only influencers. The former is defined as individuals who can achieve a high spreading effect at the early stage but lose their superiority in the final stage, and the latter are those individuals that fail to exhibit a prominent spreading performance at the early stage but influence a large fraction of nodes at the final stage. Further experiments based on eight empirical datasets, we reveal the key differences between the two types of influencers concerning their spreading capacity and the local structures. We also analyze how network degree assortativity influences the fraction of the proposed two types of influencers. The results demonstrate that with the increase of degree assortativity, the fraction of the fast-only influencers decreases, which indicates that more fast influencers tend to keep their superiority at the final stage. Our study provides insights into the differences and evolution of different types of influencers and has important implications for various empirical applications, such as advertisement marketing, and epidemic suppressing.

Cell Proliferation Kinetics of the Intramuscularly Implanted Lewis Lung Carcinoma

1980 ◽  
Vol 66 (6) ◽  
pp. 669-675 ◽  
Author(s):  
Gianna Badaracco ◽  
Claudia Greco ◽  
Giuseppe Starace
Keyword(s):  
Lung Carcinoma ◽  
Lewis Lung Carcinoma ◽  
Early Stage ◽  
Cell Loss ◽  
Lewis Lung ◽  
Phase Duration ◽  
Cell Cycle Time ◽  
Tumor Implantation ◽  
Kinetics Of ◽  
Carcinoma Tumor

The growth kinetics of the Lewis lung carcinoma tumor was studied. The main proliferative parameters of an early stage of the growth (8th day after tumor implantation) were derived from the analysis of the growth curve and the fraction of labeled mitoses (FLM curve). The occurrence of proliferative changes due to the transplantation was confirmed. The main variations observed concern a shortening of the cell cycle time, a prolongation of the S phase duration and an increase in cell loss. A critical analysis of the results of this preliminary study is reported.

GROWTH OF OXIDE LAYER ON GERMANIUM (011) SUBSTRATE UNDER DRY AND WET ATMOSPHERES

1999 ◽  
Vol 06 (06) ◽  
pp. 1053-1060 ◽  
Author(s):  
N. TABET ◽  
J. AL-SADAH ◽  
M. SALIM
Keyword(s):  
Simple Model ◽  
Oxide Film ◽  
Growth Kinetics ◽  
Photoelectron Spectroscopy ◽  
Early Stage ◽  
X Ray ◽  
Apparent Thickness ◽  
Different Temperatures ◽  
Kinetics Of

X-ray Photoelectron Spectroscopy (XPS) has been used to investigate the oxidation of (011) Ge substrates. The sample surfaces were CP4-etched, then annealed in situ, at different temperatures, for various durations. Dry and wet atmospheres were used. The oxidation rate during the early stage was increased by the presence of moisture in the atmosphere. A simple model was used to define and determine an apparent thickness of the oxide film from XPS measurements. The time dependence of the apparent thickness is consistent with a partial coverage of the surface by oxide islands. The growth kinetics of the oxide islands obeys a nearly cubic law.

scholarly journals Palate: The App for Finding Restaurant Faster

2021 ◽  
Author(s):  
Patrick Gioseffi
Keyword(s):  
Mobile Application ◽  
Early Stage ◽  
Design Principles ◽  
Major Research ◽  
Research Project ◽  
On Demand ◽  
Current Process ◽  
The Moment ◽  
The Impact

This Major Research Project (MRP) aims to investigate the impact of the on-demand economy, millennials’ digital habits, and the emergence of super apps on the restaurant-finding process. Currently, restaurant-goers are presented with multiple specialty applications to complete different tasks when evaluating restaurants. The current process of deciding on a restaurant is both time-consuming and inefficient. This project aims to propose a solution to this problem in the form of an early-stage super app called Palate. Palate is a mobile application that aims to streamline the process of discovering restaurants from the moment a restaurant-goer begins their search to the moment they confirm a reservation. This paper will discuss design principles, theories of the on-demand economy, restaurant-goers digital habits, super apps and the rationale for designing a restaurant super app interface.

Early stage kinetics of polyelectrolyte complex coacervation monitored through stopped-flow light scattering

Soft Matter ◽  
2016 ◽  
Vol 12 (44) ◽  
pp. 9030-9038 ◽  
Author(s):  
Xiaoqing Liu ◽  
Marie Haddou ◽  
Isabelle Grillo ◽  
Zohra Mana ◽  
Jean-Paul Chapel ◽  
...  
Keyword(s):  
Light Scattering ◽  
Polyelectrolyte Complex ◽  
Early Stage ◽  
Stopped Flow ◽  
Complex Coacervation ◽  
Kinetics Of

Sensitivity of mixed cation/halide perovskites to evaporation kinetics of DMSO at early stage

2021 ◽  
Author(s):  
GYUMIN KIM ◽  
Eun Seo Oh ◽  
Ajay Kumar Jena ◽  
Tsutomu Miyasaka
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Early Stage ◽  
Perovskite Solar Cells ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite ◽  
Annealing Step ◽  
Halide Perovskites ◽  
Kinetics Of ◽  
Evaporation Kinetics

Controlling the evaporation kinetics of the perovskite precursor (EKP) during the thermal annealing step of organic–inorganic hybrid perovskite solar cells (OIHPs) is important for achieving high performance. Although regulation of...

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