14,548 research outputs found
New Stationary Frame Control Scheme for Three Phase PWM Rectifiers Under Unbalanced Voltage Dips Conditions
No full textA new stationary frame control scheme for three-phase pulsewidth-modulation (PWM) rectifiers operating under unbalanced voltage dips conditions is proposed in this paper. The proposed control scheme regulates the instantaneous active power at the converter poles to minimize the harmonics of the input currents and the output voltage ripple. This paper's novelty is the development of a new current-reference generator implemented directly in stationary reference frame. This allows using proportional sinusoidal signal integrator (P-SSI) controllers for simultaneous compensation of both positive and negative current sequence components. No phase-locked loop (PLL) strategies and coordinate transformations are needed for the proposed current-reference generator. Experimental results are presented for a 20-kV A alternative current (ac)/direct current (dc) converter prototype to demonstrate the effectiveness of the proposed control scheme. A comparison with two other existing control techniques is also performed. Fast dynamic performance with small dc-link voltage ripple and input sinusoidal currents are obtained with this control scheme, even under severe voltage dips operating condition
White ginger
No full textAcrylic or watercolor painting on black velvet, depicting white ginger flowers and green foliage. Signed "Hale Pua, Hawaii." Hale Pua was either an alternate name, or the name of the studio, of artist Frank Yasutara Oda. Originally made for the tourist trade, a label on the back of the frame describes the painting as "a guaranteed hand-made product of Hawaii nei," originally sold in the Hawaii Glass & Art shop, Honolulu, Hawaii. Probably made circa 1950
Ginger, April 1968, Volume 1, Issue 1
No full textThis image was digitized and uploaded to DLynx in the Visual Resources Center in February 2025, by Wyatt Bigner '27. This issue of Ginger is from the Rhodes College Archives.This issue represents the beginning of an era of student publication at the college - Ginger, which debuted on the week of March 29, 1968. Born out of the civil and political unrest of the late 1960's, Ginger wanted to start anew, making a magazine that was "...literate, but not literary..." and challenged itself to remain relevant to the world around it, according to the preface of this issue, and being seen in the "Memphis Sounding" of the first couple of issues, advertising goings on in Memphis
Possible Tests of Fundamental Physics with GINGER
No full textThe GINGER (gyroscopes in general relativity) project foresees the construction of an array of large frame ring laser gyroscopes, rigidly connected to the Earth. Large frame ring laser gyroscopes are high-sensitivity instruments used to measure angular velocity with respect to the local inertial frame. In particular, they can provide sub-daily variations in the Earth rotation rate, a measurement relevant for geodesy and for fundamental physics at the same time. Sensitivity is the key point in determining the relevance of this instrument for fundamental science. The most recent progress in sensitivity evaluation, obtained on a ring laser prototype, indicates that GINGER should reach the level of 1 part in 1011 of the Earth’s rotation rate. The impact on fundamental physics of this kind of apparatus is reviewed
The Lightweight Design of a Dump Truck Frame based on Dynamic Responses
No full textThis paper develops a new scheme for the
lightweight design of heavy dump truck frames based on the
characteristics of dynamic responses. The dynamic response
is predicted using a finite element (FE) model which is
verified by an experimental mode analysis. The FE model is
then used to investigate the characteristics of dynamic
responses and frame weight changes with respect to the
mass changes of each frame component for selecting
significant components. An optimization is finally developed
for the lightweight design under constrains that maintain
required dynamic responses and static strength. The
optimization results show that the weight of frame can be
reduced by 8%, showing that the scheme is an effective way
to achieve automotive lightweight design
Effect of ginger (Zingiber officinale) intake on human serum lipid profile: Systematic review and meta‐analysis
No full textDyslipidemia is associated with an increased risk of cardiovascular events. Effect of ginger supplementation on lipid profile in humans remains controversial particularly in diabetic patients. A systematic search was performed covering PubMed, Medline, and Scopus, Web of Science (ISI), and Google scholar from January 2010 to January 2022. Inclusion criteria were randomized controlled clinical trials (RCT) study design, at least one of lipid profile components triglyceride (TG), total cholesterol (TC), low-density lipoprotein (LDL-C), and high-density lipoprotein (HDL-C) measured before and after ginger consumption. For quantitative data synthesis, a random-effects model was applied. Pooled data showed that ginger intake reduced TC (SMD -0.44; 95 CI: -0.86, -0.02; p = 0.025) and TG (SMD -0.61; 95 CI: -1.14, -0.08; p = 0.024) levels significantly, but it has no significant effect on improving HDL-C (SMD 0.40; 95 CI: -0.01, 0.80; p = 0.057) and LDL-C (SMD -0.34; 95 CI: -0.81, 0.13; p = 0.153). Ginger supplementation decreased TG in obese and diabetic subjects more efficiently. In terms of ginger dose, the result of meta-regression found to be significant only for TC, so that increasing daily doses of ginger reduces TC levels by (beta: -0.67; 95 CI: -1.28, -0.07; p = 0.028). Therefore, ginger could be considered as an effective lipid lowering nutraceuticals
Can ginger ameliorate chemotherapy-induced nausea? Protocol of a randomized double blind, placebo-controlled trial
No full textBackground: Preliminary research shows ginger may be an effective adjuvant treatment for chemotherapy-induced nausea and vomiting but significant limitations need to be addressed before recommendations for clinical practice can be made.Methods/Design: In a double-blinded randomised-controlled trial, chemotherapy-naïve patients will be randomly allocated to receive either 1.2 g of a standardised ginger extract or placebo per day. The study medication will be administrated as an adjuvant treatment to standard anti-emetic therapy and will be divided into four capsules per day, to be consumed approximately every 4 hours (300 mg per capsule administered q.i.d) for five days during the first three cycles of chemotherapy. Acute, delayed, and anticipatory symptoms of nausea and vomiting will be assessed over this time frame using a valid and reliable questionnaire, with nausea symptoms being the primary outcome. Quality of life, nutritional status, adverse effects, patient adherence, cancer-related fatigue, and CINV-specific prognostic factors will also be assessed.Discussion: Previous trials in this area have noted limitations. These include the inconsistent use of standardized ginger formulations and valid questionnaires, lack of control for anticipatory nausea and prognostic factors that may influence individual CINV response, and the use of suboptimal dosing regimens. This trial is the first to address these issues by incorporating multiple unique additions to the study design including controlling for CINV-specific prognostic factors by recruiting only chemotherapy-naïve patients, implementing a dosing schedule consistent with the pharmacokinetics of oral ginger supplements, and independently analysing ginger supplements before and after recruitment to ensure potency. Our trial will also be the first to assess the effect of ginger supplementation on cancer-related fatigue and nutritional status. Chemotherapy-induced nausea and vomiting are distressing symptoms experienced by oncology patients; this trial will address the significant limitations within the current literature and in doing so, will investigate the effect of ginger supplementation as an adjuvant treatment in modulating nausea and vomiting symptoms.Trial registration: ANZCTR.org.au Identifier: ACTRN12613000120774
The effect of ginger supplementation on lipid profile: A systematic review and meta-analysis of clinical trials
No full textBackground: Elevated levels of blood lipids are a major cause of atherosclerosis and consequently cardiovascular disease. Several studies used ginger as a lipid lowering agent. Purpose: The aim of the present systematic review and meta-analysis was to clarify the effect of ginger supplementation on lipid parameters. Methods: PubMed, Scopus, Science Direct, ISI Web of Science and Google Scholar were systematically searched until May 2017 to find clinical trials which examined effect of ginger supplementation on level of lipid parameters in adult participants. Means for blood lipids and potential sources of heterogeneity were extracted. A subgroup analysis was applied to find out potential sources of inter-study heterogeneity. Results: A total of 12 trials (586 participants) were included in the meta-analysis. Pooled analysis suggested that ginger supplementation reduced triacylglycerol (TAG) (-17.59 mg/dl; 95 CI: - 29.32 to - 5.87) and low density lipoprotein cholesterol (LDL-C) (- 4.90 mg/dl; 95 CI: -22.30 to - 6.17). Ginger had no significant effect on total cholesterol (TC) (- 5.13 mg/dl, 95 CI: -11.05 to 0.78; P = 0.089) and high density lipoprotein cholesterol (HDL-C) (2.18 mg/dl, 95 CI: -0.08 to 4.45; P = 0.059). As inter-study heterogeneity was high, studies were classified by ginger dosage. Stratified analysis showed a significant reduction in TC (-12.26 mg/dl; 95 CI: - 22.37 to - 2.16) and TAG ( - 38.42 mg/dl; 95 CI: - 57.01 to -19.82) in studies which used 2 g/day of ginger. Neither studies which used 2 g/day of ginger showed significant changes in LDL-C or HDL-C. Conclusion: The present systematic review and meta-analysis suggests that ginger had a favorable effect on TAG and LDL-C. Also, the result revealed that low dose of ginger (<= 2 g/day) had greater lowering impact on TAG and TC. Further studies with large-scale and better design are needed to confirm this result
The Effect of ginger herbal spray on reducing xerostomia in patients with type II diabetes
No full textObjective : The aim of the present study is to evaluate the effect of ginger herbal spray on reducing dry mouth in patients with Type II diabetes. Materials and Methods: This clinical trial was conducted on 20 patients with Type II diabetes suffering from dry mouth. The control individual for each patient was the same patient himself/herself. Each patient filled out his/her questionnaire at three different times, (before treatment, after treatment with placebo, and after taking the drug). Furthermore, the Schirmer test was performed to measure the flow of saliva in the patients. The drug and the placebo were prepared as oral sprays containing herbal extracts of ginger. Results: The mean amount of saliva after using the ginger plant spray increased significantly (p<0.001). The mean amount of saliva after treatment with medication was considerably different from the mean amount of saliva after treatment with the placebo (p<0.001). Our study included patients aged between 49 and 69 years old, (mean age 58.6 years old, and the standard deviation 5.3). The minimum and the maximum periods of type II diabetes were 2 and 21 years, the mean and the standard deviation of which were 8.8 and 5.8, respectively. Conclusion: With regard to the effectiveness of ginger herbal spray in rapidly increasing the patients' saliva and satisfaction as well as the acceptability of this type of medicine to treat dry mouths, ginger herbal spray could act as a new, cheap, and available treatment for diabetic patients with dry mouth
High-frame-rate Volumetric Porcine Cardiac Imaging
No full textVolumetric echocardiography can potentially give a more complete picture of cardiac dynamics than its two-dimensional (2D) counterpart. Current clinical volumetric imaging probes have relatively low frame rates, and often require ECG gating to stitch together an entire volume. This makes measuring fast dynamics of the heart as well as imaging patients with irregular heartbeats difficult. We have previously designed and manufactured 2D sparse arrays with elements seeded in a density-tapered spiral pattern for cardiac imaging. Using these prototypes, we demonstrate in this paper the first high-frame-rate volumetric closed-chest porcine cardiac as well as open-chest myocardial blood flow results. These preliminary results suggest the potential of performing high-frame-rate volumetric cardiac imaging using the sparse spiral arrays.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.ImPhys/Verweij groupImPhys/Medical ImagingImPhys/De Jong grou
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