Perfect Color Research Articles

A Comprehensive Review of Bilobed Flaps in Nasal Reconstruction: Technique, Outcomes, and Considerations.

Reconstruction of nasal defects, particularly in the lower third of the nose, presents significant challenges due to the area's complex 3-dimensional structure and thicker, more sebaceous skin. The bilobed flap, a double transposition flap, has been a popular method for addressing these nasal defects. This retrospective review examines a single surgeon's experience with bilobed flaps for nasal reconstruction over the last 15 years. Demographics, defect characteristics, intraoperative details, postoperative complications, and revisionary procedures were documented, and univariate and multivariate logistic regression analyses were used to assess complication rate associations. In all, 148 bilobed reconstructions were analyzed, with a mean patient age of 62.6 years and 46.0% male prevalence. The most common indication for the procedure was basal cell carcinoma following Mohs surgery, with the majority of the defects located on the lower third of the nose. The average defect size was 1.11cm². Complications occurred in 52.0% of cases, including pincushioning, scar thickening, asymmetry, alar stenosis, and wound dehiscence. Reoperations and additional treatments such as dermabrasion, steroid injections, and laser therapy were frequently necessary to address these issues. Logistic regression analysis demonstrated significantly more postoperative complications when the defect was located on the lower third of the nose when compared with the upper two-thirds. While the bilobed flap can provide adequate skin coverage with perfect color match, it is associated with notable complications that impact esthetic outcomes. Proper patient selection and surgical technique are crucial for optimizing results.

On degree-3 and (n − 4)-correlation-immune perfect colorings of n-cubes

A perfect k-coloring of the Boolean hypercube Qn is a function from the set of binary words of length n onto a k-set of colors such that for any colors i and j every word of color i has exactly S(i,j) neighbors (at Hamming distance 1) of color j, where the coefficient S(i,j) depends only on i and j but not on the particular choice of the word. The k-by-k table of all coefficients S(i,j) is called the quotient matrix. We characterize perfect colorings of Qn of degree at most 3, that is, with quotient matrix whose all eigenvalues are not less than n−6, or, equivalently, such that every color corresponds to a Boolean function represented by a polynomial of degree at most 3 over R. Additionally, we characterize (n−4)-correlation-immune perfect colorings of Qn, whose all colors correspond to (n−4)-correlation-immune Boolean functions, or, equivalently, all non-main (different from n) eigenvalues of the quotient matrix are not greater than 6−n.

Potassium Iodide Doping for Vacancy Substitution and Dangling Bond Repair in InP Core-Shell Quantum Dots.

This work highlights the novel approach of incorporating potassium iodide (KI) doping during the synthesis of In0.53P0.47 core quantum dots (QDs) to significantly reduce the concentration of vacancies (i.e., In vacancies; VIn-) within the bulk of the core QD and inhibit the formation of InPOx at the core QD-Zn0.6Se0.4 shell interfaces. The photoluminescence quantum yield (PLQY) of ~97% and full width at half maximum (FWHM) of ~40 nm were achieved for In0.53P0.47/Zn0.6Se0.4/Zn0.6Se0.1S0.3/Zn0.5S0.5 core/multi-shell QDs emitting red light, which is essential for a quantum-dot organic light-emitting diode (QD-OLED) without red, green, and blue crosstalk. KI doping eliminated VIn- in the core QD bulk by forming K+-VIn- substitutes and effectively inhibited the formation of InPO4(H2O)2 at the core QD-Zn0.6Se0.4 shell interface through the passivation of phosphorus (P)-dangling bonds by P-I bonds. The elimination of vacancies in the core QD bulk was evidenced by the decreased relative intensity of non-radiative unpaired electrons, measured by electron spin resonance (ESR). Additionally, the inhibition of InPO4(H2O)2 formation at the core QD and shell interface was confirmed by the absence of the {210} X-ray diffraction (XRD) peak intensity for the core/multi-shell QDs. By finely tuning the doping concentration, the optimal level was achieved, ensuring maximum K-VIn- substitution, minimal K+ and I- interstitials, and maximum P-dangling bond passivation. This resulted in the smallest core QD diameter distribution and maximized optical properties. Consequently, the maximum PLQY (~97%) and minimum FWHM (~40 nm) were observed at 3% KI doping. Furthermore, the color gamut of a QD-OLED display using R-, G-, and B-QD functional color filters (i.e., ~131.1%@NTSC and ~98.2@Rec.2020) provided a nearly perfect color representation, where red-light-emitting KI-doped QDs were applied.

On Forced Periodicity of Perfect Colorings

AbstractWe study forced periodicity of two-dimensional configurations under certain constraints and use an algebraic approach to multidimensional symbolic dynamics in which d-dimensional configurations and finite patterns are presented as formal power series and Laurent polynomials, respectively, in d variables. We consider perfect colorings that are configurations such that the number of points of a given color in the neighborhood of any point depends only on the color of the point for some fixed relative neighborhood, and we show that by choosing the alphabet suitably any perfect coloring has a non-trivial annihilator, that is, there exists a Laurent polynomial whose formal product with the power series presenting the perfect coloring is zero. Using known results we obtain a sufficient condition for forced periodicity of two-dimensional perfect colorings. As corollaries of this result we get simple new proofs for known results of forced periodicity on the square and the triangular grids. Moreover, we obtain a new result concerning forced periodicity of perfect colorings in the king grid. We also consider perfect colorings of a particularly simple type: configurations that have low abelian complexity with respect to some shape, and we generalize a result that gives a sufficient condition for such configurations to be necessarily periodic. Also, some algorithmic aspects are considered.

Effect of different drying heating sources on quality of brewed green tea

The development of product quality is one of the most critical factors in the industry because rate changes can result in changes in the selling value of the product. Tea processing in the industry is generally a quality analysis process before the product is marketed. Analyzing the quality of brewing in green tea is carried out when the tea is dry and then brewed to specific standards. The tea drying process is carried out using a dryer. The dryer and the fuel used significantly affect the quality of the tea before it is marketed. In this study, green tea brewing quality was tested based on dryer fuels, such as Taiwan element electric (P1), element electric (P2), wood fuel (P3), jumbo wood fuel (P4), gas fuel + element (P5), and fuel gas (P6). This study uses the factorial Randomized Block Design (RAK) method; if it has a significant effect, the BNT will be further tested. The results of this study indicate that the perfect color was found in the dryer with elemental electric with a score of 2.84 (yellowish), and the best taste was found in the gas + element dryer with a score of 2.48 (good). The steeping dregs were the brightest found in the dryer, with an electric element score of 2.34.

Perfect Colorings of the Infinite Square Grid: Coverings and Twin Colors

A perfect coloring (equivalent concepts are equitable partition and partition design) of a graph $G$ is a function $f$ from the set of vertices onto some finite set (of colors) such that every node of color $i$ has exactly $S(i,j)$ neighbors of color $j$, where $S(i,j)$ are constants, forming the matrix $S$ called quotient. If $S$ is an adjacency matrix of some simple graph $T$ on the set of colors, then $f$ is called a covering of the target graph $T$ by the cover graph $G$. We characterize all coverings by the infinite square grid, proving that every such coloring is either orbit (that is, corresponds to the orbit partition under the action of some group of graph automorphisms) or has twin colors (that is, two colors such that unifying them keeps the coloring perfect). The case of twin colors is separately classified.

The effect of surface gloss on categorical color constancy in real scenes.

Categorical color constancy has been widely investigated and found to be very robust. As one of object material properties, the surface gloss was found to barely contribute to color constancy in a natural viewing condition. In this study, the effect of surface gloss on categorical color constancy was investigated by asking eight observers to categorize 208 Munsell matte surfaces and 260 Munsell glossy surfaces under D65, F, and TL84 illuminants in a viewing chamber with a uniform gray background. A color constancy index based on the centroid shift of the color category was used to evaluate color constancy degree of each color category across illumination changes from D65 to F or TL84 illuminant. The result showed that both matte and glossy surfaces showed almost perfect color constancy on all color categories under F and TL84 illuminants, and there was no significant difference between them. This result suggests that surface gloss has little effect on categorical color constancy in a uniform gray background where the local surround cue was present, which is consistent with the previous findings.

Development, Evaluation, and Comparison of an Indigenous ‘APDS’ AI-based Digital Application for Effective Shade Selection of Silicone Maxillofacial Prosthesis: Protocol for A Cross-sectional Study

Introduction: Reconstruction of maxillofacial defects is challenging in achieving aesthetic results. Replicating natural skin colour in maxillofacial prosthesis has been traditionally done using trial-and-error methods. However, with their respective limitations, multiple methods have been developed recently, like colourimeter and spectrophotometer. Need for the study: The natural appearance of the prosthesis affects the patient’s emotional and psychological well-being. Therefore, aesthetics is a prime concern now. So, the problem with colour matching of the maxillofacial prosthesis is profound. So, there is a need to develop customised shade guides and more advanced digitised shade-matching applications with Artificial Intelligence (AI) help. Therefore, a concoction of a customised silicon shade guide was contemplated with Advanced Programme in Data Sciences (APDS) AI-based digital application, and its reproducibility in clinical practice will be analysed. Aim: Phase 1- To develop and validate a customised broad spectrum silicon shade guide and APDS AI-based digital application on a survey of the Indian population. Phase 2- Comparative evaluation of the efficacy of indigenous APDS AI-based digital application with available shade guide systems for shade selection for silicone maxillofacial prosthesis. Methodology: A cross-sectional study. The shade guide will be fabricated with medical grade room temperature vulcanising silicone based on an observational survey. The shade guide will consist of three main groups ABC, divided into different subgroups from lighter to darker skin shades, and its accuracy evaluation is done by spectrophotometer. APDS AI-based digital application will be developed using reference from broadspectrum customised maxillofacial shade guide, and efficacy will be evaluated with visual assessment of colour matching by fabricating facial veneers for participants through investigators to investigate the consent of perfect colour match. Data will be statistically analysed.

Water-soluble multifunctional red luminescent materials constructed by macrocycle–ligand–lanthanide synergetic assembly strategy

The high-efficiency red luminescent materials in water are attractive in the field of luminescent materials. In particular, those red luminescent materials with multifunctional intelligent responsiveness and good stability are very challenging and important. In this work, a purplish red emission is achieved by a synergetic supramolecular amphiphilic assembly strategy based on the water-soluble macrocyclic calixpyridinium, the bidentate ligand bathophenanthrolinedisulfonic acid disodium salt (BPhDS) and the lanthanide Eu3+. BPhDS and Eu3+ could only form a simple complex emitting a purplish blue fluorescence. Calixpyridinium and BPhDS could construct a spherical assembly. Benefitting from its pH-responsive fluorescence emission, by precise fine-tuning of its pH, a perfect white light emission was obtained and applied in a fluorescent ink. White light is an ideal light source because it has a perfect color reproducibility and stability. More excitingly, a purplish red emission is achieved by calixpyridinium-assisted amphiphilic assembly of non-red emissive BPhDS−Eu3+ complex in water. It paves a new way to construct the high-efficiency red luminescent material based on a lanthanide complex in water and exhibits many advantages: (1) all the assembly components are easy-to-get and the synergetic assembly process is very simple; (2) the supramolecular amphiphilic assembly has a synergetic effect on the luminescence of lanthanide complex in water: the natural hydrophobic inner of the assembly can expel the water molecules around lanthanide complexes and reduce the number of coordination water; the binding of the ligand by macrocycle can limit its rotation, increase its rigidity and reduce its energy loss; the synergetic assembly can shorten the distance of donor–acceptor complexes and enhance their energy transfer efficiency; (3) although the luminescent material does not contain any responsive site, the multiple weak and therefore reversible non-covalent interactions endow it with many intelligent responsiveness in various applications, such as temperature-controlled switch, anti-counterfeit material, and confidential material.

Evaluating the color stability of two esthetic ceramic materials after different surface treatments and accelerated aging procedures

Aim: Observing and evaluating the long/short-term discoloration tendency of the esthetic prosthetic materials of lithium disilicate-based glass-ceramics (IPS e.max CAD LT) and leucite-based feldspathic glass-ceramics (VITA Mark II) materials, which are esthetically very close to each other at first glance.
 Methodology: 80 samples of A2 colored lithium disilicate and feldspathic blocks samples were overglazed and polished separately to evaluate the surface treatment procedures according to CIELAB color coordinates. For accelerated aging purposes, half of the examples were treated to red wine, and the other half were treated to coffee. Color changes were calculated using the ΔE formula. The results were put into record as ΔE-1, ΔE-2, and ΔE-3. Records of the results were evaluated using IBM SPSS Statistics Standard Concurrent User V 25 statistics package program. Data distribution regarding numerical variety and changes were evaluated using the Shapiro Wilk normality test and Q-Q graphics. 
 Results: The data was evaluated using O'Brien clinical color tolerance scales. None of the samples has shown a perfect (ΔE=0-0.5) color match after 4 weeks of accelerated aging. Every group has shown results of significant statistical changes at various rates and percentages and divided into 4 subgroups as excellent, good, clinically acceptable and incompatible categories.
 Conclusion: Since aging procedures affect ceramic systems' ΔE values in a variety of ways, the aging protocol utilizing in vitro aging techniques for color changing should be evaluated alongside ceramic type and surface finishing procedures.

Color quality consideration when switching from FL to LED

Color quality consideration when switching from FL to LED

Perfect 3-colorings of Cubic Graphs of Order 8

Perfect coloring is a generalization of the notion of completely regular codes, given by Delsarte. A perfect $m$-coloring of a graph $G$ with $m$ colors is a partition of the vertex set of $G$ into m parts $A_1$, $\dots$, $A_m$ such that, for all $ i,j\in \lbrace 1,\cdots ,m\rbrace $, every vertex of $A_i$ is adjacent to the same number of vertices, namely, $a_{ij}$ vertices, of $A_j$ . The matrix $A=(a_{ij})_{i,j\in \lbrace 1,\cdots ,m\rbrace }$ is called the parameter matrix. We study the perfect 3-colorings (also known as the equitable partitions into three parts) of the cubic graphs of order $8$. In particular, we classify all the realizable parameter matrices of perfect 3-colorings for the cubic graphs of order 8.

In preprints: the fast-paced field of single-cell lineage tracing

In preprints: the fast-paced field of single-cell lineage tracing

Colorimetric indicators of açaí anthocyanin extract in the biodegradable polymer matrix to indicate fresh shrimp

Colorimetric indicator or freshness indicators hold great potential to reduce food waste. Films off açaí anthocyanins extract (AE) with different concentrations molars of two plasticizers glycerol (GLY) or triethyl citrate (TEC), for application fresh shrimp, real time were evaluated. The AE undergoes a visible pink/violet to green/yellowish color change in response to different pH's, which is an indicator of microbial spoilage in shrimp. The CI were exposed to ammonia, and analyzed through infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), ultraviolet spectroscopy, and visual colorimetric. The immobilization of the plasticizers into the CA polymer matrices were confirmed through FT-IR spectra and SEM micrographs. In vitro chromatic transition of the indicators exposed to ammonia vapors, were visually more perceptible when they were produced with 7.2 mols of GLY or 1.8, 3.6, and 7.2 mols of TEC. For the real-time analysis of the application of colorimetric indicators in gray shrimp samples, the indicators that had plasticizers showed perfect color change at the exact time of food deterioration. The colorimetric indicators developed in this study using different molar concentrations of plasticizers are simple, effective and a great eco-friendly alternative to chemical sensors already developed so far.

Flexible White Lighting Fabricated With Quantum Dots Color Conversion Layers Excited by Blue Organic Light-Emitting Diodes

In this study, HATCN is coated on flexible PET/indium tin oxide (ITO) substrate as a modified layer and a hole injection layer to improve the hole injection from ITO. Then a blue organic light emitting diode (OLED) can successfully be fabricated without a surface treatment procedure (O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> plasma or UV Ozone treatment). The new blue TADF series fluorescent material is employed as emitting layer with a luminescence wavelength of 456 nm. Also, it has a narrow full width at a half maximum (FWHM) of 26 nm featuring excellent color chromaticity. Quantum dot (QD) photoresist is a perfect color conversion material featuring good color adjustability, narrow emission spectrum, high luminous efficiency, and simple spin-coating processes. In this study, the photoresist mixed with green and red quantum dots is used as a color conversion layer (CCL), and a blue OLED is utilized to excite green and red CCL. To test the material of QD photoresist, it is coated on the substrate of another piece of glass first and then the blue OLED is utilized to remotely excite green and red QD CCL. The fluorescence characteristic of QD photoresist is explored to acquire a spectrum of 528 nm and 620 nm. In the device structure of a blue OLED, the electron-and hole-only current density is compared and the hole transport layer TAPC thickness is adjusted to improve the luminance and efficiency. Finally, green and red quantum dot photoresist is mixed using a proper ratio and then directly coated on the back of the PET/ITO substrate. Furthermore, the thickness of the QD photoresist is adjusted to increase the QD excited fluorescence. The blue OLED and QD CCL was integrated to generate three primary colors, i.e., blue, green, and red. Finally, a flexible white OLED lighting panel is successfully fabricated using simple processes. Moreover, it features high-spectrum stability. The CIE coordinates will not drift with bias, thus, it can resist the voltage variation.

Highly thin film with aerosol-deposited perovskite quantum dot/metal oxide composite for perfect color conversion and luminance enhancement

Erstwhile, displays using down-converting color changing medium utilized color filters as an essential part of clarifying the trade-off between true colors and transmittance. In this study, we report the development of a novel, smart process for producing thin luminescent films that completely convert colors and enhance light intensity. Highly dense films are prepared by the co-deposition of perovskite quantum dots and metal oxide particles as color conversion layers and scattering agents, respectively. These layers can be directly deposited on blue organic light-emitting diodes using ultrasonic-assisted aerosol deposition (UAD). This method can allow displays using a down-conversion system to streamline the process due to absence of color filters. Using this method, films can be a minimum of 3 µm thick for complete conversion of blue light, a quarter that of inkjet-printed films. We demonstrate 7,353 cd m-2 in green and 411 cd m-2 in red converted emissions with no blue light leakage. Furthermore, the developed technique was shown to be compatible with versatile patterning processes. For example, UAD may be combined with a fine-metal shadow mask to produce a pattern of 30-μm-diameter dots. Even without using a mask, the method still produces a pattern of 13 μm wide lines. This system provides a new approach that may serve as an alternative to inkjet printing.

On perfect colorings of paths divisible by a matching

On perfect colorings of paths divisible by a matching

On Perfect Colorings of Paths Divisible by a Matching

On Perfect Colorings of Paths Divisible by a Matching

London model of dual color superconductor

The Meissner effect for the chromoelectric field E⃗a is a property of the non-perturbative QCD vacuum medium assumed to explain the observed confinement of color. The color dielectric function ϵ of such a medium should vanish. By Lorentz invariance ϵμ = 1 i.e., its color magnetic permeability μ should diverge. The assumption based on analogy is well motivated: Ordinary superconductor is the physical medium with μ = 0, confining the opposite magnetic charges (would they exist). For the first successful phenomenological description of both the Meissner effect and superconductivity within Maxwell equations Fritz London guessed two equations for the superconductivity current. We adapt his arguments to QCD and come with two analogous manifestly non-Abelian London-like equations. One equation describes the dual Meissner effect. The analogy is, however, not perfect: We can only speculate that there is some sort of chromo-magnetic superfluidity in QCD phenomena to which the second equation might be ascribed. Moreover, from more advanced Ginzburg-Landau (GL) theory of superconductivity it follows that the Meissner effect is a consequence of spontaneous breaking of the underlying global U(1) symmetry. This is certainly not the case of the dual Meissner effect. Fortunately, the derived London-like equations suggest a strongly color-paramagnetic behavior. We interpret it as a guide to the phenomenological Ginzburg-Landau-like manifestly gauge-invariant low-momentum QCD with the confining vacuum which behaves as a perfect color paramagnet (μ = +∞).

Thermally Activated Delayed Fluorescence Amorphous Molecular Materials for High-Performance Organic Light-Emitting Diodes.

Small-molecule thermally activated delayed fluorescence (TADF) materials have been extensively developed to actualize efficient organic LEDs (OLEDs). However, organic small molecules generally compromise thin film quality and stability due to the tendency of crystallization, aggregation, and phase separation, which hence degrade the efficiency and long-term stability of the OLEDs. Here, for the first time, we exploit the unique molecular configuration of the bimesitylene scaffold to design two highly efficient TADF amorphous molecular materials with excellent thermal and morphological stabilities. The twisted and rigid bimesitylene scaffold thwarts regular molecular packing and crystallization, thereby guaranteeing homogeneous and stable amorphous thin films. Meanwhile, the highly twisted geometry of the bimesitylene scaffold efficiently breaks the molecular conjugation and thus conserves the high energies of the lowest locally excited triplet states (3LE) above the lowest charge transfer states (1CT and 3CT), leading to small singlet-triplet energy splitting and fast reverse intersystem crossing. These TADF emitters exhibit high photoluminescence quantum yields of 0.90 and 0.69 and short TADF lifetimes of 4.94 and 1.44 μs in doped films, based on which the greenish-blue and greenish-yellow OLEDs achieve external quantum efficiencies of 23.2 and 16.2%, respectively, with small efficiency roll-off rates and perfect color stability.