A Test of Parylene as a Protective System for Microcircuitry

1975 ◽  
Author(s):  
L. David Hanley ◽  
Jacob H. Martin
Keyword(s):  
Protective System

Evaluation of Lightweight and Low Profile Communications Devices for Respiratory Protective System 21 (RESPO 21)

1992 ◽  
Author(s):  
James E. Dvorsky ◽  
G. F. Renner ◽  
Kevin M. Taylor ◽  
William J. Williams ◽  
Kenneth J. Woodruff
Keyword(s):  
Low Profile ◽  
Protective System

The Child Protection System

2019 ◽  
pp. 391-414
Author(s):  
Richard J. Gelles
Keyword(s):  
Child Protection ◽  
The United States ◽  
Family Preservation ◽  
Child Protective Service ◽  
Protective Service ◽  
System P ◽  
Abuse And Neglect ◽  
Protective System ◽  
The Common ◽  
Home Placement

This chapter examines the child protective system in the United States by first examining the scaffolding created by federal legislation and federal funding. Next, it reviews three significant Supreme Court decisions that bear on the operation of child protective service systems. Lastly, it examines the common process and flow of individual cases of child abuse and neglect from initial reporting, through investigation, service response, possible out-of-home placement, and finally decisions regarding when and why to close the case. The conclusion discusses the three core goals of the child protective service system: safety and wellbeing of children; permanency of caregiving; and family preservation.

Activity of myeloperoxidase of neutrophils in the blood of pregnant women with diffuse toxic goiter

2020 ◽  
Vol 21 (4) ◽  
pp. 23-26
Author(s):  
A. Z. Aliyeva ◽  
◽  
A. E. Esedova ◽  
T. M. Dibirov ◽  
M. M. Bakayev ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Peripheral Blood ◽  
Hormone Metabolism ◽  
Thyroid Hormone Metabolism ◽  
Cytochemical Analysis ◽  
Comparative Aspect ◽  
Protective System ◽  
Blood Neutrophils ◽  
Main Component ◽  
Toxic Goiter

Aim. To study the activity of myeloperoxidase in the peripheral blood of pregnant women in normal and thyroid diseases. Materials and methods. Cytochemical analysis was used to study the activity of myeloperoxidase in peripheral blood neutrophils of pregnant women with diffuse toxic goiter, as well as in women with the physiological course of pregnancy in a comparative aspect. Results. It was found that in women with a physiological course of pregnancy, the cytochemical parameters of myeloperoxidase in neutrophils were reduced only in the 1st trimester of pregnancy. In patients with diffuse toxic goiter, with severe thyrotoxicosis syndrome, the activity of the enzyme was significantly reduced during all periods of pregnancy. Apparently, these shifts of the enzyme, which is the main component of the protective system of blood phagocytes, are associated with their functional stress. Conclusion. Based on this opinion, it seems that blood neutrophils enter the system of thyroid hormone metabolism by their degradation. Apparently, this mechanism is activated with an increased content of hormones in the circulation, which occurs during pregnancy, and especially with concomitant diffuse toxic goiter with thyrotoxicosis syndrome and is aimed at preserving homeostasis necessary for normal fetal development.

scholarly journals Evaluation of Lightning Protection Efficacy on Nigerian Installations High Voltage Installations Using Screen and Cone of Protection Methods

2019 ◽  
Vol 4 (7) ◽  
pp. 1-10
Author(s):  
M. O. Oyeleye
Keyword(s):  
High Voltage ◽  
Computer Aided Design ◽  
Travelling Waves ◽  
Screening Method ◽  
Lightning Strike ◽  
Physical Measurement ◽  
Lightning Strikes ◽  
Spatial Design ◽  
Protective System ◽  
Design Values

This study evaluated lightning protective system efficacy on 11kV-132kV substation-power line installation in Ikorodu, Lagos State, Nigeria with reference to cloud to ground(C-G) lightning strike (LS) events. It focus on interception of lightning strikes and its protection with reference to direct lightning strike (DLS) and indirect lightning strike (IDLS). Data were collected from Ikorodu 132/33 kV Transmission Substation and its four major injection stations.  This work was carried out using physical measurement of raw data obtained from the high voltage substation. Installations were scaled down and modelled dimensionally using AutoCAD software in order to measure spatial parameters in order to measure the screening of the existing substations and connected lines, as well as the existing cone angles of protection. Probability of lightning efficiency of lightning protective level (LPL) are used for screening evaluation while spike and sky wire angle of protection are used for cone of protection evaluation. Physical measurement of six substations (33/11 kV and 132/33 kV substations) in the studied area were also carried out to evaluate the effectiveness of the installed lightning arresters with respect to the protected devices using applicable standard. The results under the prevailing lightning protective system, LPS, (screening method), revealed that the existing 33/11 kV and 132/33 kV substations are not adequately protected against lightning strike; 132/33 kV substation is more vulnerable to lightning strike than 33/11kV substation and that the incoming 132kV power lines to the substation are adequately protected. The evaluation of the installed distances of all lightning arresters are within standard range and would adequately protect substation transformers against travelling waves (Indirect Stroke) events. The installed lightning arresters (LAs) would adequately protect substation transformers against travelling waves (Indirect Stroke) events. The adequate protection should be reinforced with proposed design scheme in further study in order to mitigate the disastrous effects of lightning strike. Any proposed design of protective system for electric power installations in Nigeria should be simulated using computer aided design software for scaled validation of dimensional and spatial design values in order to mitigate reported failures and uncertainties in identifying causes of observed failures in the system.

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