Using the Design of Experiment Method to Develop an Energy Loss Model for Non-Oriented Electrical Steel Alloys

2021 ◽  
Vol 902 ◽  
pp. 71-77
Author(s):  
Veronica Paltanea ◽  
Gheorghe Paltanea ◽  
Horia Gavrila ◽  
Iosif Vasile Nemoianu
Keyword(s):  
Energy Loss ◽  
Design Of Experiment ◽  
Negative Impact ◽  
Equation System ◽  
Energy Losses ◽  
Magnetic Polarization ◽  
Electrical Steels ◽  
Cut Edge ◽  
Response Equation

The main scope of the paper is to apply the Design of Experiment (DoE) method and to develop a predictive model of energy losses for non-oriented electrical steels. This approach permits us to determine a mathematical model, which is the predicted response (energy losses) as a function of input data (strip width and peak magnetic polarization) and experimental results. The presented DoE model is based on a classical central composite design of type 2n + 2n + 1 with two-levels (n = 2) and as a consequence only nine experimental points are necessary. The equation system that is associated with the model, generates a surface response equation, which permits the energy loss computation for different values of width strip and peak magnetic polarization. The DoE model was implemented, using different software packages as MathCad, Excel and OriginPro 2018, in the case of two types of electrical steels namely NO20 and M300-35A alloys that are used in small size electrical machines. In this case, the strain hardening phenomena at the cut edge becomes important, due to its negative impact on energy losses. The computed results were compared with the experimental data and errors lower than 5 % were determined.

Abstract 2605: Hypoglycemia Does Not Increase Long-term Mortality Or Morbidity In Diabetic Patients With Myocardial Infarction. A Report From The Digami 2 Trial.

Circulation ◽  
2007 ◽  
Vol 116 (suppl_16) ◽  
Author(s):  
Linda G Mellbin ◽  
Klas Malmberg ◽  
Anders Waldenstrom ◽  
Hans Wedel ◽  
Lars Ryden
Keyword(s):  
Myocardial Infarction ◽  
Blood Glucose ◽  
Negative Impact ◽  
Significant Risk ◽  
Significant Risk Factor ◽  
Diabetic Patients ◽  
Type 2 Dm ◽  
Hazard Ratios

Aims Tight, insulin-based glucose control is recommended to diabetic patients (DM pat) with acute myocardial infarction (AMI). A potential draw-back would be if insulin induced hypoglycaemia (HG) had a negative impact of future prognosis. Methods 1253 pat (mean age 68 years; 67% males) with type 2 DM and suspect AMI were followed for a median of 2.1 years. 947 were randomised to insulin infusion during at least 24 hours while 306 were treated routinely. HG (blood glucose<3.0 mmol/L with or without symptoms) was recorded during hospitalisation. Unadjusted and adjusted (age, sex, smoking, previous MI and heart failure, renal function, duration of DM, coronary interventions, blood glucose at randomisation) Hazard Ratios (HR) and 95% Confidence Intervals (CI) for cardiovascular events (CVE = death, MI or stroke) during follow up were calculated. Results 153 pat (12.2%) experienced HG. During the first 24 hours 111 (11.7%) insulin-treated pat experienced HG (symptomatic 23.4%) compared with 3 (1.0%) pat on routine treatment (symptomatic 33.3%). As outlined in the figure HG was not an independent predictor of subsequent CVE. Conclusion Insulin induced HG was not a significant risk factor for subsequent CVE in AMI-pat with type 2 DM. Hypoglycaemic seem to identify patients at high risk for other reasons.

Comparison between Magnetic Anisotropy Energy and a Parameter to the Assessment of Magnetic Property of Electrical Steel

2018 ◽  
Vol 930 ◽  
pp. 449-453
Author(s):  
R.A.C. Felix ◽  
R.L.O. da Rosa ◽  
Luiz P. Brandão
Keyword(s):  
Magnetic Properties ◽  
Magnetic Property ◽  
Magnetic Anisotropy ◽  
Electrical Steel ◽  
Anisotropy Energy ◽  
Alternative Methods ◽  
Magnetic Polarization ◽  
Magnetic Anisotropy Energy ◽  
Electrical Steels ◽  
Global Parameters

Alternative methods of quantitative texture analysis are applied to characterize the non-oriented grain electrical steels (NOG) in relation to their magnetic properties. Magnetic anisotropy energy (Ea) and A parameter are two models based on crystallographic texture that generates global parameters that can be used to predict the magnetic properties of NOG steels. In this work, these two models were used to evaluate the magnetic polarization and compared between themselves to realize which one best correlates to this property.

Role of Metformin in Reversing the Negative Impact of Hyperglycemia on Bone Healing Around Implants Inserted in Type 2 Diabetic Rats

2017 ◽  
Vol 32 (3) ◽  
pp. 547-554 ◽  
Author(s):  
Caroline Serrão ◽  
Marta Bastos ◽  
Daniele Cruz ◽  
Fernando Malta ◽  
Paolla Vallim ◽  
...  
Keyword(s):  
Bone Healing ◽  
Negative Impact ◽  
Diabetic Rats ◽  
Type 2 Diabetic

scholarly journals A Method of Predicting the Energy Losses in Vaneless Diffusers of Centrifugal Compressors

1989 ◽  
Author(s):  
Huashu Dou
Keyword(s):  
Experimental Data ◽  
Energy Loss ◽  
Total Energy ◽  
Wall Friction ◽  
Energy Losses ◽  
Flow Conditions ◽  
Centrifugal Compressors ◽  
Flow Losses ◽  
Vaneless Diffusers ◽  
Good Agreement

The flow losses in the veneless diffusers of centrifugal compressors is investigated. It is found that the total energy loss in vaneless diffusers is a function of Bsin2 α0 when inlet flow conditions and radius ratio between inlet and outlet are given. A wall friction coefficient equation is derived and a method of predicting the total energy loss excepting mixing loss is presented. A comparison is made between results obtained from this method and experimental data generated by the author as well as data from the literature. Good agreement is obtained.

scholarly journals Nephrolithiasis against type 2 diabetes mellitus: on the effect of hypoglycemic therapy on lithogenesis

2018 ◽  
Vol 90 (10) ◽  
pp. 60-64
Author(s):  
S K Yarovoy ◽  
E N Kareva ◽  
O V Djalilov
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Negative Impact ◽  
Stone Formation ◽  
Hypoglycemic Agents ◽  
Control Group ◽  
City Hospital ◽  
Increased Risk

Aim. To study the effects of oral hypoglycemic agents that can affect the probability of recurrence of nephrolithiasis. Materials and methods. The article is based on the results of examination and treatment of 315 patients suffering from recurrent nephrolithiasis and medically compensated type 2 diabetes mellitus treated at the N.A. Lopatkin Institute of Urology and Interventional Radiology - the branch of the SMRC of Radiology, Ministry of Health of Russia and D.D. Pletnev City Hospital Moscow Healthcare Department in 2012-2017. The patients were divided into three groups according to the applied tool antidiabetic: metformin, glibenclamide, canagliflozin. The control group consisted of patients receiving insulin therapy. Results and discussion. The propensity of Metformin to reduce the pH of urine, which has a negative impact in the conditions of urate nephrolithiasis, which is most common in the population of patients with type 2 diabetes mellitus. Glibenclamide, on the contrary, somewhat latches urine. But changes in the reaction of urine under the influence of the drug do not go beyond normal values and are not clinically significant. Canagliflozin increases diuresis due to medication induced glycosuria and stimulates renal excretion of uric acid and its salts. However canagliflozin does not cause significant shifts in the pH of urine that may somewhat negates the increased risk of recurrence of urate stone formation in the background of the uricosuric effect of the drug. Conclusion. Drug therapy of type 2 diabetes mellitus significantly affects the properties of urine from patients with nephrolithiasis.

THE ENERGY LOSS, THE DETERIORATION DEPTH, AND THE LIGHT OUTPUT FOR HEAVY IONS IN ZnO:Zn

1967 ◽  
Vol 45 (12) ◽  
pp. 4039-4051 ◽  
Author(s):  
L. Hastings ◽  
A. van Wijngaarden
Keyword(s):  
Energy Loss ◽  
Heavy Ions ◽  
Light Output ◽  
Average Energy ◽  
Ion Beams ◽  
Low Energy ◽  
Energy Losses ◽  
Sufficient Energy ◽  
Low Energy Ions ◽  
Total Average

Local regions on the surface of ZnO:Zn phosphor samples were deteriorated by a large number of low-energy ions. In this manner thin films which did not luminesce under ion bombardment were prepared. The phosphor samples were then scanned across energetic ion beams with sufficient energy to traverse the thin phosphor films. By comparing the luminescent response to this ion excitation in the damaged and undamaged portions of the phosphor surface, the total average energy losses of 1H, 4He, 14N, 40Ar, and 84Kr in passing through the films were determined. It was found that the energy losses for the heavier projectiles, when compared with the energy loss of hydrogen, are appreciably smaller than the energy losses predicted by the Lindhard and Scharff theory.The deterioration depth of the phosphor under prolonged bombardment is proportional to the speed of the damaging projectiles.

Energy losses of ions implanted in matter

1996 ◽  
Vol 11 (11) ◽  
pp. 2876-2883 ◽  
Author(s):  
J. H. Liang ◽  
K. Y. Liao
Keyword(s):  
Energy Loss ◽  
Nuclear Energy ◽  
Critical Energy ◽  
Carbon Films ◽  
Electronic Energy ◽  
Energy Losses ◽  
Nuclear Energy Loss ◽  
Light Ions ◽  
First Moment ◽  
First Four Moments

A set of simple and accurate formulae for the first four moments of nuclear and electronic energy losses is proposed. A new variable is introduced to include the finite maximum-impact-parameter effect in the nuclear stopping process, which is assumed to be infinite in most studies. A critical energy at which the electronic energy loss is equal to the nuclear energy loss is also defined. It determines whether the nuclear or the electronic stopping process is the dominant mechanism in terms of incident-ion energy. The critical energy increases for heavy ions implanted in heavy target materials during the first moment of energy loss. The second moment of electronic energy loss is important only for light ions implanted at high ion energies. The third and fourth moments of nuclear energy loss are much larger than those of the electronic energy loss for all ion-target combinations. Theoretical predications of the projected ranges and range stragglings for gold ions implanted in carbon films are close to the experimental data when these proposed four moments of nuclear and electronic energy losses are considered.

scholarly journals Restoring redox balance enhances contractility in heart trabeculae from type 2 diabetic rats exposed to high glucose

2015 ◽  
Vol 308 (4) ◽  
pp. H291-H302 ◽  
Author(s):  
Niraj M. Bhatt ◽  
Miguel A. Aon ◽  
Carlo G. Tocchetti ◽  
Xiaoxu Shen ◽  
Swati Dey ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
High Glucose ◽  
Negative Impact ◽  
Antioxidant Activities ◽  
Contractile Function ◽  
Heart Function ◽  
Redox Balance ◽  
The Impact ◽  
Type 2 Diabetic

Hearts from type 2 diabetic (T2DM) subjects are chronically subjected to hyperglycemia and hyperlipidemia, both thought to contribute to oxidizing conditions and contractile dysfunction. How redox alterations and contractility interrelate, ultimately diminishing T2DM heart function, remains poorly understood. Herein we tested whether the fatty acid palmitate (Palm), in addition to its energetic contribution, rescues function by improving redox [glutathione (GSH), NAD(P)H, less oxidative stress] in T2DM rat heart trabeculae subjected to high glucose. Using cardiac trabeculae from Zucker Diabetic Fatty (ZDF) rats, we assessed the impact of low glucose (EG) and high glucose (HG), in absence or presence of Palm or insulin, on force development, energetics, and redox responses. We found that in EG ZDF and lean trabeculae displayed similar contractile work, yield of contractile work (Ycw), representing the ratio of force time integral over rate of O2 consumption. Conversely, HG had a negative impact on Ycw, whereas Palm, but not insulin, completely prevented contractile loss. This effect was associated with higher GSH, less oxidative stress, and augmented matrix GSH/thioredoxin (Trx) in ZDF mitochondria. Restoration of myocardial redox with GSH ethyl ester also rescued ZDF contractile function in HG, independently from Palm. These results support the idea that maintained redox balance, via increased GSH and Trx antioxidant activities to resist oxidative stress, is an essential protective response of the diabetic heart to keep contractile function.

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