scholarly journals “Review on premature white and grey hair in children.”

2020 ◽  
Vol 4 (05) ◽  
Author(s):  
Suresh Mahajan
Keyword(s):  
Hair Colour ◽  
Visual Appearance ◽  
Premature Ageing ◽  
Grey Hair

Skin and hair colour contribute significantly to our overall visual appearance of person. The description of kesha and palitya is scattered in all the treatises of ayurveda. In ayurveda premature greying of hair is called as akalapalitya. The incidence of premature ageing along with akala palitya is on increase. These days the quality of hair products has degraded over the years. This review has been undertaken to the various causes of greying hair in children.

Analysis of color Image Enhancement Using DWT, Wavelet Shrinkageand FHE Methods

2017 ◽  
Vol 7 (8) ◽  
pp. 56
Author(s):  
Ashish Dwivedi ◽  
Nirupma Tiwari
Keyword(s):  
Image Enhancement ◽  
Color Image ◽  
Human Perception ◽  
Histogram Equalization ◽  
Wavelet Shrinkage ◽  
Visual Appearance ◽  
Enhancement Method ◽  
Fuzzy Histogram ◽  
Rgb Image

Image enhancement (IE) is very important in the field where visual appearance of an image is the main. Image enhancement is the process of improving the image in such a way that the resulting or output image is more suitable than the original image for specific task. With the help of image enhancement process the quality of image can be improved to get good quality images so that they can be clear for human perception or for the further analysis done by machines.Image enhancement method enhances the quality, visual appearance, improves clarity of images, removes blurring and noise, increases contrast and reveals details. The aim of this paper is to study and determine limitations of the existing IE techniques. This paper will provide an overview of different IE techniques commonly used. We Applied DWT on original RGB image then we applied FHE (Fuzzy Histogram Equalization) after DWT we have done the wavelet shrinkage on Three bands (LH, HL, HH). After that we fuse the shrinkage image and FHE image together and we get the enhance image.

scholarly journals Wavelet-Based Weighted Median Filter For Image Denoising Of MRI Brain Images

2018 ◽  
Vol 10 (1) ◽  
pp. 201 ◽  
Author(s):  
N. Rajalakshmi ◽  
K. Narayanan ◽  
P. Amudhavalli
Keyword(s):  
Additive White Gaussian Noise ◽  
Median Filter ◽  
Wiener Filter ◽  
Brain Images ◽  
Visual Appearance ◽  
Mri Brain ◽  
Weighted Median ◽  
Weighted Median Filter ◽  
Mri Brain Images

<p>Preliminary diagnosing of MRI images from the hospital cannot be relied on because of the chances of occurrence of artifacts resulting in degraded quality of image, while others may be confused with pathology. Obtained MRI image usually contains limited artifacts. It becomes complex one for doctors in analyzing them. By increasing the contrast of an image, it will be easy to analyze. In order to find the tumor part efficiently MRI brain image should be enhanced properly. The image enhancement methods mainly improve the visual appearance of MRI images. The goal of denoising is to remove the noise, which may corrupt an image during its acquisition or transmission, while retaining its quality. In this paper effectiveness of seven denoising algorithms viz. median filter, wiener filter, wavelet filter, wavelet based wiener, NLM, wavelet based NLM, proposed wavelet based weighted median filter(WMF) using MRI images in the presence of additive white Gaussian noise is compared. The experimental results are analyzed in terms of various image quality metrics.</p>

scholarly journals From hair colour to diagnosis

2021 ◽  
Vol 7 (2) ◽  
pp. 068-072
Author(s):  
V. Broshtilova
Keyword(s):  
Social Impact ◽  
Signal Transduction Pathways ◽  
Human Communication ◽  
Hair Colour ◽  
Visual Appearance ◽  
Disease Phenotypes ◽  
Exact Determination ◽  
Clinical Conditions ◽  
Physical Phenomena

Hair pigmentation contributes extremely to the visual appearance and human-to-human communication, thus exerting enormous sexual and social impact. Follicular melanogenesis depends on genetic, biochemical and physical phenomena as well as proper epithelial-melanocytic interaction. Shades of grey, yellow, brown, red, and black produced by melanin define the exact determination of hair colour. Versatile clinical conditions depend on genetic melanogenetic changes, pigment transfer to bulb keratinocytes defects and impaired signal transduction pathways. Herein, an update of recent scientific advances on follicular melanogenesis and its pathological-driven compartmental changes reflecting specific disease phenotypes, are presented.

scholarly journals Changes in Microbiological and Physicochemical Quality of Dried Persimmons (Diospyros kaki Thunb.) Stored at Various Temperatures

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Jeong-Eun Hyun ◽  
Ji-Yeon Kim ◽  
Eun-Mi Kim ◽  
Jong-Chan Kim ◽  
Sun-Young Lee
Keyword(s):  
Moisture Content ◽  
Shelf Life ◽  
Color Index ◽  
Visual Quality ◽  
Microbial Populations ◽  
Diospyros Kaki ◽  
Visual Appearance ◽  
Different Temperatures ◽  
Yeasts And Molds

This study was conducted to investigate the microbiological, physicochemical, and visual quality of dried persimmons (Diospyros kaki Thunb. cv. Cheongdo-Bansi) during storage at various temperatures in order to determine the shelf-life. Two commercial dried persimmon samples were evaluated for changes in weight, moisture content, color, texture (hardness and gumminess), and microbial populations during storage at different temperatures (−20, 5, 12, and 25°C) for 70 days. Overall, dried persimmon-2 showed lower levels of total mesophilic bacteria, Escherichia coli, coliforms, yeasts, and molds than dried persimmon-1. Among the physicochemical qualities, significant differences were observed in color parameters such as L∗, a∗, and b∗ of the dried persimmons. However, no significant differences in weight, moisture content, and texture were observed in dried persimmons during storage for 70 days. Thus, changes in visual appearance and color index such as chroma value and browning index can be used as indicators for determining the shelf-life of dried persimmons.

The Quality of Sewage Flows and Sediment in Dundee

1990 ◽  
Vol 22 (10-11) ◽  
pp. 39-46 ◽  
Author(s):  
R. M. Ashley ◽  
B. P. Coghlan ◽  
C. Jefferies
Keyword(s):  
Mass Balance ◽  
Classification System ◽  
Suspended Sediments ◽  
Research Centre ◽  
Water Research ◽  
Visual Appearance ◽  
Strength Data ◽  
Combined Sewer

Inter-related studies are underway in Dundee to investigate the nature, origins, disposition and movements of sewer sediments and associated pollutants. These studies, funded mainly by the Water Research Centre, have provided support for a proposed subjective classification system for combined sewer sediments based on visual appearance, occurrence and polluting strength. Data obtained from samples of suspended sediments at either end of a 175m length of the main Dundee sewer during dry weather and storm flows have been used to carry out a mass balance for the length over a one month period and, despite the obvious limitations, the results compare surprisingly well with the observed changes in the volume of bed deposits along the length for the same period.

Evaluation of the Technological Characteristics and Bread-Making Quality of Alternative Wheat Cereals in Comparison with Common and Durum Wheat

2011 ◽  
Vol 17 (2) ◽  
pp. 135-142 ◽  
Author(s):  
A. Pasqualone ◽  
A.R. Piergiovanni ◽  
F. Caponio ◽  
V.M. Paradiso ◽  
C. Summo ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Durum Wheat ◽  
Protein Content ◽  
Environmental Effects ◽  
Sensory Properties ◽  
Carotenoid Pigments ◽  
Bread Making ◽  
Visual Appearance ◽  
Technological Characteristics

The growing sensibility toward those foods that are characterized by natural and healthy features has raised the interest toward alternative wheat cereals. This research was carried out to compare the technological characteristics and the bread-making quality of Khorasan wheat, type Kamut and spelt (cv. Forenza), to those of common (cv. Rio) and durum wheat (cv. Norba). The results obtained show that both Forenza and Kamut gave an acceptable bread-making performance. A certain variability affected flour characteristics (protein content, carotenoid pigments and alveograph indices) over the 2 years of experimentation, due to environmental effects. This reflected on the corresponding breads but the statistical analysis indicated that, on the whole, Kamut bread was characterized by a high content of carotenoid pigments. Regarding sensory properties (profiled by means of 11 descriptors of visual appearance, texture, odor and flavor) and loaf volumes, breads from Forenza and Kamut appeared different from each other but similar to those obtained from Rio and Norba grown in the same environment, respectively.

scholarly journals Influence of preliminary osmotic dehydration on drying kinetics and final quality of carrot (Daucus carota L.)

2011 ◽  
Vol 32 (3) ◽  
pp. 185-194 ◽  
Author(s):  
Stefan Kowalski ◽  
Dominik Mierzwa
Keyword(s):  
Daucus Carota ◽  
Osmotic Dehydration ◽  
Drying Kinetics ◽  
Convective Drying ◽  
Drying Time ◽  
Solid Gain ◽  
Visual Appearance ◽  
Daucus Carota L ◽  
Colorimetric Measurements

Influence of preliminary osmotic dehydration on drying kinetics and final quality of carrot (Daucus carotaL.)This paper concerns convective drying of carrot preliminary dehydrated in aqueous solutions of three types of osmotic agents (sucrose, fructose, glucose). Three solution concentrations (20, 40 and 60%) were examined to work out efficient conditions of osmotic dewatering. The parameters such as water loss (WL), solid gain (SG) and osmotic drying rate (ODR) indicating the real efficiency of osmotic dehydrations (OD) were determined. The samples dehydrated with osmotic solutions underwent further convective drying to analyze influence of dehydration process on drying kinetics and final products quality. The quality of products was assessed on the basis of visual appearance of the samples and colorimetric measurements. It was found that osmotic pretreatment improves significantly the final product quality as the samples were less deformed and their colour was better preserved compared to samples, which had not been preliminarily dehydrated. Preliminary dehydration, however, did not influence significantly the overall drying time of the samples.

Sensorial and Chemical Quality of Gamma-Irradiated Fresh-Cut Iceberg Lettuce in Modified Atmosphere Packages†

2002 ◽  
Vol 65 (11) ◽  
pp. 1760-1765 ◽  
Author(s):  
XUETONG FAN ◽  
KIMBERLY J. B. SOKORAI
Keyword(s):  
Ascorbic Acid ◽  
Dehydroascorbic Acid ◽  
Storage Period ◽  
Modified Atmosphere ◽  
Visual Appearance ◽  
Iceberg Lettuce ◽  
Fresh Cut ◽  
Gamma Irradiated ◽  
Safety Enhancement

A study was conducted to investigate the effects of various doses of irradiation on the quality of fresh-cut iceberg lettuce and to determine a suitable maximum dose. Fresh-cut iceberg lettuce packaged in film bags was exposed to 0, 1, 2, 3, and 4 kGy of gamma radiation and stored at 3°C for 14 days. CO2 levels were higher and O2 levels were lower in packages containing irradiated lettuce than in those containing nonirradiated lettuce for most of the storage period. Comparison with nonirradiated lettuce indicated that total ascorbic acid (ascorbic acid plus dehydroascorbic acid) content and firmness were not significantly influenced by irradiation at 1 or 2 kGy. The overall visual appearance was best for lettuce irradiated at 1 or 2 kGy. This improved quality may be related to the high CO2 and low O2 levels observed for the irradiated samples. Electrolyte leakage for lettuce increased with higher radiation doses and was correlated (R2 = 0.99) with a soggy appearance. The leakage for lettuce irradiated at ≥2 kGy was significantly more extensive than that for nonirradiated lettuce. The irradiation of fresh-cut lettuce in modified atmosphere packages at doses of 1 kGy and perhaps 2 kGy for safety enhancement and quality improvement is feasible.

scholarly journals Correlating Coating Quality of Coverage with Rheology for Mica-Based Paints

2020 ◽  
Vol 30 (1) ◽  
pp. 119-129
Author(s):  
Jacob Anderson ◽  
Shailesh Shori ◽  
Esmaiel Jabbari ◽  
Harry J. Ploehn ◽  
Francis Gadala-Maria ◽  
...  
Keyword(s):  
Shear Stress ◽  
Hysteresis Loops ◽  
Poor Quality ◽  
Gradual Change ◽  
Visual Appearance ◽  
The Difference ◽  
Good Strain ◽  
Frequency Sweeps ◽  
Visual Properties

Abstract This paper examines the relationship between rheology and the qualitative appearance of dried, mica-based paint coatings used in the aerospace industry. The goal is to identify key rheological characteristics indicative of poor coating visual appearance, providing a screening tool to identify unsatisfactory paint formulations. Four mica paints were studied, having coating visual appearances ranging from very poor to very good. Strain sweeps indicated that the poor-quality paints have a smaller % strain midpoint in the linear visco-elastic range; while the good-quality paints have a lower G’/G” cross-over point in frequency sweeps. Thixotropy experiments utilizing single and multiple-loop hysteresis cycles plotting shear stress as a function of shear rate showed that the base mica paints with good appearance had nearly constant, reversible profiles in the forward and the backward directions; while the mica paints with poor appearance were irreversible with a noticeable gradual change in shear stress as more loops are run. The difference in area between the forward and the reverse curves was determined, leading to a quantifiable criterion that can differentiate good paints from poor paints with significance testing. This work would establish the first rheology model using hysteresis loops to predict the visual properties of mica-based paints.

scholarly journals Does substrate colour affect the visual appearance of gilded medieval sculptures? Part I: colorimetry and interferometric microscopy of gilded models

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Qing Wu ◽  
Meret Hauldenschild ◽  
Benedikt Rösner ◽  
Tiziana Lombardo ◽  
Katharina Schmidt-Ott ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Analytical Techniques ◽  
Gold Surface ◽  
Digital Microscopy ◽  
Common View ◽  
Visual Appearance ◽  
Gold Leaf ◽  
History Of ◽  
Colour Appearance

AbstractIn the history of medieval gilding, a common view has been circulated for centuries that the substrate colour can influence the visual appearance of a gilded surface. In order to fully understand the correlation between the gilding substrate and the colour appearance of the gold leaf laid above, in this paper (Part I) analytical techniques such as colorimetry and interferometric microscopy are implemented on models made from modern gold leaves. This study demonstrates that the substrate colour is not perceptible for gold leaf of at least 100 nm thickness, however the surface burnishing can greatly alter the visual appearance of a gold surface, and the quality of the burnishing is dependent on the substrate materials. Additionally, surface roughness and texture of the substrate can play supplementary roles, which can be visually observed through digital microscopy and quantified through interferometric microscopy. The findings in this paper will form the basis for the study of gold leaf samples taken from medieval European gilded sculptures in Part II.

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