Electrical Conductivity Analysis for Networks of Conducting Rods Using a Block Matrix Approach: A Case Study under Junction Resistance Dominant Assumption

2019 ◽  
Vol 124 (1) ◽  
pp. 986-996 ◽  
Author(s):  
Dongjae Kim ◽  
Jaewook Nam
Keyword(s):  
Electrical Conductivity ◽  
Block Matrix ◽  
Matrix Approach ◽  
Junction Resistance

scholarly journals The risk of static electricity at handling diesel fuel

2021 ◽  
Vol 343 ◽  
pp. 10013
Author(s):  
Mihaela Părăian ◽  
Emilian Ghicioi ◽  
Niculina Vătavu ◽  
Dan Gabor ◽  
Sorin Iuliu Mangu
Keyword(s):  
Electrical Conductivity ◽  
Diesel Fuel ◽  
Static Electricity ◽  
Fuel Type ◽  
Point Temperature ◽  
Flammability Characteristics ◽  
Fuel Tanks ◽  
Temperature And Pressure ◽  
A Company

Diesel fuel in motion when is transporting by pipes when is mixing, pumping, filtering, agitating or by pouring them from one vessel to another can generate static charges. Also, static electricity may occur if the liquid is splashes and forms a mist inside the tank. Accumulation of static electricity can, under certain conditions, be discharge and ignite the flammable/explosive atmosphere. Ignition hazards from static discharges can be eliminated by controlling the generation or accumulation of static charges or by eliminating a flammable mixture where static electricity may be discharged. Factors that need to be considered to reduce the risk of ignition sunt flammability characteristics of explosive atmosphere (the vapor pressure, flash point, temperature, and pressure) and the factors that determine the charging of static electricity (fuel type, electrical conductivity, sulfur content, viscosity, vehicle process: flow rate, pipe diameter, filters, pumps, spark promoters). In this paper are presented some aspects regarding the technical, organizational requirements and responsibilities of the personnel designated to prevent the formation and accumulation of static electricity when loading diesel fuel tanks, starting from a case study, respectively some explosions which occurred to a company during the loading operation.

scholarly journals Hydro-Sedimentary Study of a Tidal River: Case Study of the Arvand River in Iran

2021 ◽  
Vol 11 (1) ◽  
pp. 9-16
Author(s):  
M. Bakhtiari ◽  
A. Ashtari Larki ◽  
A. Samer
Keyword(s):  
Electrical Conductivity ◽  
Field Study ◽  
Water Level ◽  
Neap Tide ◽  
Spring Tide ◽  
Suspended Sediments ◽  
Tidal River ◽  
Deep Distribution ◽  
Suspended Sediments Concentration

Abstract The present field study investigated hydraulic and sediment in tidal conditions. Measurements were made for two stations at neap tide and spring tide for 13-hour periods at no-dimensional depths of 0.2, 0.6 and 0.8 of the water level each time. In these measurements, the parameters of velocity, direction of flow, electrical conductivity, temperature and depth were measured directly, and to determine the amount of suspended sediments per hour, 3 samples of one litre from the mentioned depths were measured by the instantaneous vertical sampler and taken to a laboratory. An examination of the depth charts of the suspended sediments concentration for all stations, and in both the neap tide and the spring tide, showed that, in general the suspended sediments concentration increased with increasing depth. Moreover, the deep distribution of sediments concentration showed that the values obtained in the laboratory corresponded well with the values calculated from the Rouse equation, and as the depth increases, the sediments concentration usually increases.

scholarly journals How Physicochemical Parameters of Water Change with Distance in a Lake: Case Study Lake Bunyonyiinkigezi

2021 ◽  
Vol 7 (4) ◽  
pp. 1-22
Author(s):  
Mukasa Tebandeke I.Z ◽  
Karume I ◽  
Ssebuwufu J ◽  
Wasajja H.Z ◽  
Nankinga R ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Dissolved Oxygen ◽  
Oxygen Demand ◽  
Agricultural Practices ◽  
Aquatic Organisms ◽  
Total Hardness ◽  
Ambient Temperatures ◽  
High Chemical Oxygen Demand ◽  
Whatman Paper

Pollution resulting from unsustainable agricultural and urbanization activities in the Ruhezamyenda and Bunyonyi catchments are threatening lake Bunyonyi. These have led to high chemical oxygen demand (COD), electrical conductivity, turbidity, pH, iron (II) concentration and low dissolved oxygen (DO5). In this study we have investigated the how COD, turbidity, pH, concentration of iron, total suspended solids, total nutrients and DO5 of water changed with distance in lake. Water sampled from different distances in the lake filtered using Whatman paper at ambient temperatures was tested for COD, electrical conductivity, turbidity, total nutrients, iron, hardness and DO5. COD was 20.8±.0.03mg/L to 16 ± 0.03mg/L; total hardness was 16.5±0.2 mg/L to 18.6 ± 0.3 mg/L total nitrate was 103.5± 2 mg/L to 88 ± 3 mg/L; total phosphate was 100.8 ±.2.5 to 87± 3 mg/L; high TSS values from 3.4 ± 0.1 mg/L to 2.5 ± 0.1 mg/L showed contamination of water. As pH decreased from 8.3 ± 0.03 to 7.6 ± 0.04 revealed that bases were getting removed. The turbidity dropped from 25.7 ± 0.3 NTU to 20 ± 2 NTU due settling down of sediments. Iron (II) concentration ranging from 1.1± 0.1 to 0.8± 0.1 mgL-1 . Dissolved oxygen decreased from 7.9 ±0.3 mg/L to 4.8 ± 0.2 mg/L indicating surface water can uphold life of aquatic organisms. Total hardness ranged from 0.22± 0.05 to 0.19± 0.05 mg/L Electrical conductivity was high and ranged from 130± 5 to 150± 5 µS/cm indicating presence of electrolytes. Lake Bunyonyi water is not greatly polluted, but requires to be safe guarded against poor unsustainable agricultural practices, sewage draining from towns, schools and hotels in nearby settlements.

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