Inspection and Control of Surface Mount Processes for Electronic Part Assembly

2002 ◽  
Author(s):  
Hyungsuck Cho
Keyword(s):  
Surface Mount ◽  
Electronic Part ◽  
And Control

Studies Regarding the Evolution of Pollutant Emissions Related to Certain Transitory Condition of an Internal Combustion Engine Using Mobile Measuring Systems

2016 ◽  
Vol 823 ◽  
pp. 303-308 ◽  
Author(s):  
Ilie Dumitru ◽  
Florin Colici ◽  
Alexandru Mihai Dima ◽  
Vladimir Mărdărescu
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Pollutant Emissions ◽  
Measuring Systems ◽  
Complex Assembly ◽  
Mechanical Parts ◽  
Electronic Part ◽  
And Control

The internal combustion engine that equips a vehicle is a complex assembly of mechanical parts and electronics that controls almost every system. The electronic part of the vehicle gives the opportunity to observe and control what happens with the engine during function. The present paper follows the evolution of the pollutant emissions in relation with some transitory regimes of the car.

scholarly journals Aplicação do Jidoka em um processo SMT: estudo de caso

Exacta ◽  
2020 ◽  
Vol 18 (3) ◽  
pp. 459-474
Author(s):  
Iracyanne Retto Uhlmann ◽  
Carlos Américo de Souza Silva ◽  
Djonathan Luiz De Oliveira ◽  
Enzo Morosini Frazzon
Keyword(s):  
Surface Mount Technology ◽  
Surface Mount ◽  
Set Top Box ◽  
And Control

Produção com qualidade é assunto crítico em qualquer processo, mais especialmente em processos cujo recurso predominante seja o uso de máquinas, as quais caso não estejam ajustadas ou capacitadas a detectar falhas, podem contribuir para altos custos de desperdício de defeitos em série, seja pelo reprocesso ou pelo refugo de produtos não conformes. O objetivo deste artigo é apresentar um estudo de caso na aplicação do Jidoka em um processo de Surface Mount Technology (SMT), essa ferramenta foi usada para direcionar ações que contribuíram na detecção e eliminação de defeitos de set top box sem vídeo. A pesquisa foi aplicada em uma empresa multinacional do Polo Industrial de Manaus (PIM). A metodologia foi guiada pelo Define, Measure, Analyze, Improve and Control (DMAIC). Como resultados, a ferramenta se mostra adequada para este tipo de processo, ganho financeiro foi evidenciado, além da redução significativa de problemas no produto final.

Control of Metal Alloy Oxidation with Electric Fields

1973 ◽  
Vol 31 ◽  
pp. 164-165
Author(s):  
R. R. Dils ◽  
P. S. Follansbee
Keyword(s):  
Electric Fields ◽  
Oxidation Process ◽  
Base Alloy ◽  
Oxide Surface ◽  
Platinum Electrodes ◽  
Insulating Layer ◽  
Iron Base Alloy ◽  
Alloy Oxidation ◽  
Aluminum Oxide Layer ◽  
And Control

Electric fields have been applied across oxides growing on a high temperature alloy and control of the oxidation of the material has been demonstrated. At present, three-fold increases in the oxidation rate have been measured in accelerating fields and the oxidation process has been completely stopped in a retarding field.The experiments have been conducted with an iron-base alloy, Pe 25Cr 5A1 0.1Y, although, in principle, any alloy capable of forming an adherent aluminum oxide layer during oxidation can be used. A specimen is polished and oxidized to produce a thin, uniform insulating layer on one surface. Three platinum electrodes are sputtered on the oxide surface and the specimen is reoxidized.

Evidence for a Blood Ganglion Barrier in the Superior Cervical Ganglion of the Rat

1982 ◽  
Vol 40 ◽  
pp. 204-204
Author(s):  
D. M. DePace
Keyword(s):  
Blood Vessels ◽  
Superior Cervical Ganglion ◽  
Peripheral Nerves ◽  
Time Schedule ◽  
Transmission Electron ◽  
Cervical Ganglion ◽  
The Central Nervous System ◽  
Cervical Ganglia ◽  
Capillary Circulation ◽  
And Control

The majority of blood vessels in the superior cervical ganglion possess a continuous endothelium with tight junctions. These same features have been associated with the blood brain barrier of the central nervous system and peripheral nerves. These vessels may perform a barrier function between the capillary circulation and the superior cervical ganglion. The permeability of the blood vessels in the superior cervical ganglion of the rat was tested by intravenous injection of horseradish peroxidase (HRP). Three experimental groups of four animals each were given intravenous HRP (Sigma Type II) in a dosage of.08 to.15 mg/gm body weight in.5 ml of.85% saline. The animals were sacrificed at five, ten or 15 minutes following administration of the tracer. Superior cervical ganglia were quickly removed and fixed by immersion in 2.5% glutaraldehyde in Sorenson's.1M phosphate buffer, pH 7.4. Three control animals received,5ml of saline without HRP. These were sacrificed on the same time schedule. Tissues from experimental and control animals were reacted for peroxidase activity and then processed for routine transmission electron microscopy.

Effects of renovascular hypertension on rat adrenal zona glomerulosa

1978 ◽  
Vol 36 (2) ◽  
pp. 582-583
Author(s):  
G. Mazzocchi ◽  
P. Rebuffat ◽  
C. Robba ◽  
P. Vassanelli ◽  
G. G. Nussdorfer
Keyword(s):  
Renovascular Hypertension ◽  
Left Kidney ◽  
Renin Angiotensin System ◽  
Plasma Renin ◽  
Zona Glomerulosa ◽  
Ultrastructural Changes ◽  
Albino Rats ◽  
Left Renal Artery ◽  
Angiotensin System ◽  
And Control

It is well known that the rat adrenal zona glomerulosa steroidogenic activity is controlled by the renin-angiotensin system. The ultrastructural changes in the rat zona glomerulosa cells induced by renovascular hypertension were described previously, but as far as we are aware no correlated biochemical and morphometric investigations were performed.Twenty adult male albino rats were divided into 2 experimental groups. One group was subjected to restriction of blood flow to the left kidney by the application of a silver clip about the left renal artery. The other group was sham-operated and served as a control. Renovascular hypertension developed in about 10 days: sistolic blood pressure averaged 165 ± 6. 4 mmHg, whereas it was about 110 ± 3. 8 mmHg in the control animals. The hypertensive and control rats were sacrificed 20 days after the operation. The blood was collected and plasma renin activity was determined by radioimmunological methods. The aldosterone concentration was radioimmunologically assayed both in the plasma and in the homogenate of the left capsular adrenal gland.

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