Measuring the Equivalent Series Resistance of the Low Impedance Electrolytic Capacitors in Pulsed Current State

2013 ◽  
Vol 333-335 ◽  
pp. 122-125
Author(s):  
Xu Fei Wang ◽  
Kai Xie ◽  
Teng Li ◽  
Zhong Qun Li ◽  
Rong Bin Guo
Keyword(s):  
Series Resistance ◽  
Cost Effective ◽  
Calibration Method ◽  
Pulsed Current ◽  
Equivalent Series Resistance ◽  
Circuit Implementation ◽  
Electrolytic Capacitors ◽  
Current State ◽  
Cost Effective Method

A cost-effective method for quickly evaluating the equivalent series resistance (ESR) of electrolytic capacitors is proposed. This approach has the ability to measure the low ESR of milliohms level, meanwhile provide the pulsed testing current up to hundreds of amperes. Therefore, this method is suitable for fast inspecting the quality of bulk capacitors. The operational principle, circuit implementation and the calibration method are presented, and the performances of the prototype are tested, which validate the proposed scheme.

scholarly journals A Prospectus for Inclusion: Project study for a potential education solution for Syria’s Persons with Disability (PwDs)

2019 ◽  
Author(s):  
Ammar AlMustafa ◽  
Ahmad Alashkar
Keyword(s):  
Project Management ◽  
Cost Effective ◽  
Public Agencies ◽  
Project Study ◽  
Governmental Organizations ◽  
Non Governmental Organizations ◽  
Cost Effective Method ◽  
Innovative Solution ◽  
Access And Quality

The article proposes an innovative solution to the problems in the access and quality of STEM concepts education to Persons Living with Disability (PwD) in Syria. A project management-based approach is detailed below for a cost-effective method to be implemented by non-governmental organizations or public agencies.

scholarly journals High-Quality, Cost-Effective Strategy for Detection of Autoantibodies to Extractable Nuclear Antigens

2001 ◽  
Vol 8 (3) ◽  
pp. 471-474 ◽  
Author(s):  
Tri G. Phan ◽  
Watson W. S. Ng ◽  
Dana Bird ◽  
Kara Smithers ◽  
Vicky Wong ◽  
...  
Keyword(s):  
Cost Effective ◽  
Turnaround Time ◽  
Enzyme Linked Immunosorbent Assay ◽  
Serum Samples ◽  
Quality Cost ◽  
Nuclear Antigens ◽  
Cost Effective Method ◽  
Meaningful Result ◽  
Clinical Diagnoses

ABSTRACT We evaluated methods for the detection of autoantibodies to extractable nuclear antigens (ENAs) to determine the strategy that yielded the most cost effective and clinically meaningful result. We prospectively compared counterimmunoelectrophoresis (CIEP) with and without serum prediffusion (SPD) and found that SPD significantly improved the quality of precipitation lines. This resulted in a decreased requirement for repeat testing and, consequently, was associated with a significant decrease in reagent costs and specimen turnaround time. We also retrospectively compared reactivity by CIEP, CIEP plus SPD, enzyme-linked immunosorbent assay (ELISA), and line immunoassay (LIA) of 52 serum samples that were previously determined to be positive for ENAs, and we correlated the results with clinical diagnoses. There was significant agreement among CIEP, CIEP plus SPD, ELISA, and LIA for the detection of anti-SS-A, anti-SS-B and anti-RNP. In general, CIEP, CIEP plus SPD, and LIA correlated better with the clinical diagnoses than ELISA, even though ELISA detected anti-ENAs more often than the other methods. CIEP plus SPD is therefore the most cost effective method for the identification of clinically meaningful ENAs. Based on our experience, we now screen for ENAs by CIEP, and positive samples are then typed by CIEP plus SPD. Samples that are difficult to interpret are then further assessed by an alternative method.

scholarly journals Gerybinių stemplės anastomozės striktūrų gydymas

2008 ◽  
Vol 6 (3) ◽  
pp. 0-0
Author(s):  
Eugenijus Stratilovas ◽  
Egidijus Sangaila
Keyword(s):  
Cost Effective ◽  
Late Complications ◽  
Esophageal Surgery ◽  
Treatment Modalities ◽  
Simple Mode ◽  
Key Words Esophageal Cancer ◽  
Cost Effective Method ◽  
Long Time ◽  
Benign Stenosis

Eugenijus Stratilovas,  Egidijus SangailaVilniaus universiteto Onkologijos instituto Bendrosios ir abdominalinės chirurgijosir onkologijos skyrius, Santariškių g. 1, LT-08660 VilniusEl paštas: [email protected] Įvadas Viena iš dažniausiai pasitaikančių vėlyvųjų komplikacijų po stemplės rezekcinio pobūdžio operacijų yra gerybinė anastomozės striktūra. Dėl striktūros išsivysčiusi disfagija ilgam pablogina ligonio gyvenimo kokybę. Pagrindiniai šios komplikacijos gydymo metodai išlieka dažnos endoskopijos, dilatacijos bužais sukėlus nejautrą. Autoriai siūlo taikyti gana paprastą šių striktūrų gydymo metodą – dilataciją Folley kateteriu. Rezultatai Šiuo būdu gydyti keturi pacientai. Visi procedūrą pakėlė gerai, gydymo komplikacijų nebuvo. Po dviejų procedūrų rijimas tapo normalus, toliau procedūros tęstos ambulatoriškai, praėjus 3 mėn. rijimas išliko normalus. Išvada Anastomozės striktūros dilatacija Folley kateteriu yra saugus, veiksmingas ir pigus metodas. Reikšminiai žodžiai: stemplės vėžys, anastomozės striktūra, dilatacija The treatment of the benign esophagus anastomosis strictures Eugenijus Stratilovas,  Egidijus SangailaVilnius University, Institute of Oncology, Department of Generaland Abdominal Surgery and Oncology, Santariškių str. 1, LT-08660 Vilnius, LithuaniaE-mail: [email protected] Background One of the most frequent late complications after the resectable type of esophageal surgery is benign anastomosis stricture. The subsequent dysphagia worsens the patients’ quality of life for a long time. The main treatment modalities for this complication remain frequent endoscopy, dilatation using weighted bougies under anesthesia. Authors recommend use a simple mode of treatment – dilatation with the Folley catheter. Results Four patients underwent the treatment. All patients felt well, there were no treatment complications. Swallowing after two procedures became normal, the treatment was continued in outpatient clinic; after three months the swallowing was good. Conclusions Dilatation of a stricture with the Folley catheter is a safe and cost-effective method. Key words: esophageal cancer, anastomosis benign stenosis, dilatation

scholarly journals Understanding the Cost-Effectiveness of Hearing Aids and Surgery for the Treatment of Otosclerosis

2022 ◽  
Author(s):  
Danielle M. Gillard ◽  
Jeffrey D. Sharon
Keyword(s):  
Quality Of Life ◽  
Cost Effectiveness ◽  
Hearing Aids ◽  
Cost Effective ◽  
Stapes Surgery ◽  
Cost Effective Method ◽  
Patient Reported ◽  
Complications Of Surgery ◽  
The Cost

Abstract Purpose of Review To summarize and critically review recent literature on the relative cost-effectiveness of hearing augmentation versus stapes surgery for the treatment of otosclerosis. Recent Findings Otosclerosis leads to reduced patient quality of life, which can be ameliorated by either stapes surgery, or hearing aid usage. The success of stapes surgery is high, and the risks of serious postoperative complications are low. Hearing aids don’t have the complications of surgery but are associated with long-term costs. Cost-effectiveness models have shown that stapes surgery is a cost-effective method for treating otosclerosis. Summary Both stapes surgery and hearing aids can improve patient-reported quality of life in otosclerosis. Stapes surgery has larger upfront costs and surgical risks, but hearing aids are associated with longer lifetime costs. Stapes surgery is cost-effective for the treatment of otosclerosis.

scholarly journals A review on phytoremediation as an ecological method for in situ clean up of heavy metals contaminated soils

2019 ◽  
Vol 112 ◽  
pp. 03024 ◽  
Author(s):  
Nicolae Cioica ◽  
Cătălina Tudora ◽  
Dorin Iuga ◽  
György Deak ◽  
Monica Matei ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Contaminated Soils ◽  
Crop Yields ◽  
Agricultural Soils ◽  
Animal Health ◽  
Cost Effective ◽  
Current State ◽  
Cost Effective Method ◽  
Excessive Accumulation

Heavy metals are among the most common types of contaminants in agricultural soils, especially those bordering the cities, due to the uncontrolled use of sewage sludge, compost, mining waste and chemical fertilizers. Excessive accumulation of heavy metals, which do not degrade over time, adversely affects crop yields by decreasing microbial activity and fertility of contaminated soils. Also, excess of heavy metals in the soil poses a serious threat to plant and animal health and, through their entry into the food chain, to human health. For this reason, the decontamination of soils contaminated with heavy metals has become a necessity. This review presents the current state of phytoremediation research as the most cost-effective method of in-situ environmental decontamination of soils contaminated with heavy metals.

scholarly journals Evolution of Polymer Tantalum Capacitors

2021 ◽  
Vol 11 (12) ◽  
pp. 5514
Author(s):  
Yuri Freeman ◽  
Philip Lessner
Keyword(s):  
Low Voltage ◽  
Series Resistance ◽  
Cost Effective ◽  
Equivalent Series Resistance ◽  
Mission Critical

The major advantage of Polymer Tantalum capacitors over other types of tantalum capacitors is their low equivalent series resistance (ESR), providing a higher capacitance stability with frequency and ripple current capability. When Polymer Tantalum capacitors were introduced to the market in mid 1990s, they were low voltage, leaky, and unreliable, which limited their applications to commercial electronics. Today, some types of polymer tantalum capacitors demonstrate the highest working voltage, lowest DC leakage, and highest reliability ever achieved in tantalum capacitors. These Polymer Tantalum capacitors combine outstanding performance and reliability with superior volumetric charge efficiency, which makes them cost effective and attractive for numerous applications, including mission critical ones. This paper is dedicated to the major technological breakthroughs and scientific discoveries that enabled the radical evolution of Polymer Tantalum capacitors.

A New Method for Testing Electrolytic Capacitors to Compare Life Expectancy

2014 ◽  
Vol 2014 (DPC) ◽  
pp. 001759-001786 ◽  
Author(s):  
Stephani Gulbrandsen ◽  
Joelle Arnold ◽  
Nick Kirsch ◽  
Greg Caswell
Keyword(s):  
Life Expectancy ◽  
Historical Data ◽  
Series Resistance ◽  
Liquid Electrolyte ◽  
Time To Failure ◽  
Equivalent Series Resistance ◽  
Electrolytic Capacitors ◽  
Electrical Stress ◽  
Specialized Equipment ◽  
Lifetime Testing

Power system applications, such as street lighting, typically have a 10 year warranty. When these systems include electrolytic capacitors, it is important to choose a supplier that meets these requirements. Traditional lifetime testing of electrolytic capacitors to ascertain their life expectancy requires specialized equipment, is time consuming, labor intensive, and for most OEMs, is ultimately cost prohibitive. Electrolytic capacitors with the same capacitance and voltage ratings from different suppliers may be rated to the same lifetime, but historical data confirms that they can have significantly different operational expected lives. An accelerated testing methodology is needed to compare the reliability of electrolytic capacitors from different suppliers. DfR has developed an approach that reduces test times from thousands of hours to several weeks by taking advantage of two key behaviors of electrolytics. The first involves the rate at which capacitors lose electrolyte, which is fairly predictable at a given temperature and electrical stress. The second key behavior is the dependence of the equivalent series resistance (ESR) of electrolytic capacitors on the volume of liquid electrolyte. The approach that will be described in this paper will demonstrate a means of comparing the time to failure for comparable capacitors from different suppliers under the same conditions. Case studies will demonstrate how this method avoids the extended testing that is typically required.

scholarly journals A Rapid Phenotyping Method for Imazamox Resistance in Wheat

2018 ◽  
Vol 36 ◽  
Author(s):  
G. BRECCIA ◽  
M.B. BISIO ◽  
L. PICARDI ◽  
G. NESTARES
Keyword(s):  
Production Systems ◽  
Lolium Multiflorum ◽  
Cost Effective ◽  
Screening Methods ◽  
Breeding Programs ◽  
Resistant Cultivars ◽  
Cost Effective Method ◽  
Effective Option ◽  
Argentine Pampas

ABSTRACT: The availability of imidazolinone (IMI) resistant cultivars has provided an effective option for weed control in wheat production systems. IMI herbicides control several weeds, including Avena fatua and Lolium multiflorum, which are the most frequent grass weeds in wheat crops of the Argentine Pampas. The aim of this study was to develop a soil-less method that allows rapid phenotyping of IMI resistance in wheat. Nine wheat cultivars differing in IMI resistance were evaluated through a between-paper germination method. Herbicide concentrations required to reduce shoot and root length by 50% for resistant cultivars were > 75 fold that of the susceptible cultivars. The response of resistant and susceptible commercial cultivars was assessed in the between-paper and top-paper methods at 100 mM imazamox as discriminating dose. The Z’-factor was calculated for evaluation of the quality of the screening methods. Both germination methods showed Z’-factors > 0 indicating that the assays were appropriate but the between-paper method allowed to save space in the growth chamber. The germination methods were useful for distinguishing between susceptible and resistant plants carrying at least one resistance gene. The rapid, simple and cost-effective method described in the present study could be a potential tool when selecting for IMI resistance in wheat in breeding programs.

scholarly journals Removal of Copper from Water Solutions by Adsorption on Spruce Sawdust

Proceedings ◽  
2019 ◽  
Vol 16 (1) ◽  
pp. 52 ◽  
Author(s):  
Zdenka Kovacova ◽  
Stefan Demcak ◽  
Magdalena Balintova
Keyword(s):  
Wastewater Treatment ◽  
Low Cost ◽  
Cost Effective ◽  
Peat Moss ◽  
Human Beings ◽  
Cost Effective Method ◽  
Negative Impacts ◽  
Major Factors ◽  
Scientific Attention

Pollution of water by toxic elements is one of the major factors of concern for human health, as well as for environmental quality, and draws a large amount of scientific attention. New and cheaper methods of wastewater treatment are increasing the quality of the environment and reducing the negative impacts on fauna, flora, and human beings. The sorption technique is considered a cost effective method for effectively removing heavy metals. During the past few years, there have been increasing studies dedicated to using low-cost adsorbents like bark, tannin-rich materials, lignin, chitosan peat moss, and sawdust. The presented paper describes the adsorption behavior of spruce wood sawdust. In order to determine its applicability for wastewater treatment, copper removal from model solutions was studied.

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