Print Patterns Research Articles

Finger Print Patterns amongst Federal Polytechnic Ede Students in Osun State, Nigeria

This study determined the fingerprint patterns of 1000 students in Federal Polytechnic Ede, Osun State, Nigeria. A fingerprint is the reproduction of the friction ridges present on the inner surface of a fingertip. The fingerprint patterns were recognized based on the appearance of ridges lines to determine loops, whorls, and arches. The finger print samples were collected from the respondents based on the random sampling method. This study lasted 5 months, from December 2021 to May 2022. Materials used for this study; stamp pad, white paper, methylated spirit, and cotton wool. The smeared thumbs of both hands of the respondents were printed on plain white paper. For demographics, name, age, sex, department, and state of origin were collected. Of the 1000 students used for this study, 571 were females and 429 were males. The fingerprint pattern Loop was the highest, while the Arch pattern was the least. From this study, it was discovered that the distribution of dermatoglyphic patterns was almost similar on both hands as regards handedness, while bilateral variations could not be established, but there was an association between the distribution of fingerprint patterns, gender and handedness.

Comparison of Three Methods for Lip Print Analysis: Lipstick, Latent, and Digital Photography for Sex Determination and Permanency Assessment Over Time

ABSTRACT Background: Lip print analysis, also known as cheiloscopy, is a valuable tool in forensic science for personal identification and sex determination. Methods: A total of 116 individuals (58 males and 58 females) were enrolled in this study. Lip prints were obtained using three methods: lipstick application, latent print development, and digital photography. The obtained lip prints were analyzed for accuracy, sex-specific variations, and stability over a 6-month period. Results: Lip print patterns exhibited significant differences between males and females across all three methods. The lipstick method demonstrated consistent and identifiable lip print patterns, with 25 males (43.1%) and 39 females (67.2%) displaying pattern 1. In contrast, the latent method showed less consistent results, with lip print pattern 1 observed in 25 males (43.1%) and 28 females (48.3%). Digital photography emerged as a promising alternative, offering detailed documentation capabilities, with pattern 1 observed in 30 males (51.7%) and 37 females (63.8%). However, no statistically significant association was found between lip print patterns and sex in the latent and digital methods. A longitudinal assessment revealed variations in lip print patterns over time, with some individuals showing changes in pattern distribution. Conclusion: These findings underscore the utility of lip print analysis in forensic science and emphasize the need for further research to enhance the interpretation of lip print evidence.

LiDICS: a light dynamics interface for multi-domain simulation based on the FMI-standard

The assessment of adaptive façades faces several challenges, including the representation of adjustable material and geometric properties within building performance simulation. This paper introduces a methodical and model-based interface dedicated to this issue. Adjustable material and geometric façade properties can be captured and continuously adapted within the building performance simulation using this model, without the need to reinitialise the simulation as required with matrix-based methods. The method comprises two steps: model training and export. Model training transforms ray-tracing-based sampling outcomes into an algebraic function. Model export generates a Functional Mock-up Unit. The LiDICS method is applied to switchable membrane cushion constructions with complementary printing patterns. The model training achieves a high accuracy ( r 2 = 99.4 % ). Subsequently, an inter-model validation is conducted using annual simulation from the RADIANCE 3-phase method, likewise resulting in high accuracy ( r 2 = 98.5 % ). Lastly, a brief analysis is conducted to compare four operation strategies regarding coupled comfort and energy assessment.

Enhancing coloration performance and colour fastness of nano‐pigment ink‐jet‐printed blended fabrics through cationic and water‐repellent surface modification

AbstractThe coloration performance and colour fastness properties, crucial for industrial textile printing, depend on the spreading and fixation behaviour of ink‐jet droplets on porous fabrics. Current nano‐pigment‐based ink‐jet applications provide unstable results for these properties, especially for synthetic and blended fabrics. This study focuses on cellulose‐based blended fabrics as substrates to modify the wetting properties of fabrics through cationic and water‐repellent treatments, to improve the coloration performance and colour fastness systematically. The study conducted analytical experiments to analyse the surface element composition, ion potential and surface morphology of the fabrics. Differences in printing colour and pattern performance were attributed to the behaviour of ink droplet spreading on the fabric surface and inside the fabric, including wetting time, colourant distribution, and ring shape. The results indicate that ink droplet spreading on fabrics significantly influences printing pattern sharpness, including edge clarity and colour intensity, which can be improved through surface modification, including cationic and water repellent treatment. The use of blended fabrics treated with 1% cationic modifier and 0.05% fluorine‐containing water repellent resulted in effective suppression of droplet formation and significant enhancement of colour performance and fastness. Furthermore, as the ink droplet volume decreased from 5 to 1 μL, the coffee ring effect on the fabric treated with the water repellent agent gradually diminished, leading to improved printing sharpness during the printing process.

High detail resolution cellulose structures through electroprinting

Electrospinning is a technique used to fabricate polymer fibers in micro- and nanoscales. Due to the large distance between the nozzle and collector, there is a limited positioning accuracy of electrospun fibers. To enhance the possibility of fabricating structures with micrometer placement, an electroprinting technique has been developed. By reducing the distance between the nozzle and the collector it is demonstrated that it is possible to get an improved control over fiber positioning which gives a possibility to fabricate designed 3D structures at the micron scale. In this study, cellulose acetate (CA) has been selected as a biomaterial to advance the 3D printing of membranes with possible use in separation applications. Various parameters, such as CA concentration and molecular weight, printing speed, printing pattern, applied voltage, etc. are evaluated with respect to printing control. Results indicate that by optimizing the printing parameters it is possible to print structures with inter- fiber distances down to 3 µm and fiber diameters at a sub-µm scale. This electroprinting development is promising for the fabrication of customized separation membranes. However, printing speed still remains a challenge.

Extrusion-Based Three-Dimensional Printing of Metronidazole Immediate Release Tablets: Impact of Processing Parameters and in Vitro Evaluation

PurposeThe current study assessed the potential of a pneumatic 3D printer in developing a taste-masked tablet in a single step. Metronidazole (MTZ) was chosen as the model drug, and Eudragit® E PO was used as a taste-masking polymer to produce taste-masked tablets.MethodsThe study focused on optimizing processing parameters, such as the nozzle's printing speed, the printhead's heating temperature, and the pressure. Oval-shaped tablets were printed with a rectilinear printing pattern of 30% and 100% infill and evaluated for in vitro drug release and taste masking. The 3D-printed tablets are also characterized using Differential Scanning Calorimetry (DSC), Fourier-transform Infrared Spectroscopy (FTIR), and Scanning Electron Microscopy (SEM).ResultsThe infill density impacts the drug release profile of the tablets. F9, F10, and F11 displayed desired printability among the formulations, with F9 and F10 exhibiting over 85% drug release within 60 min in the in vitro dissolution study. The F9 formulation, with 30% infill, effectively masked the bitter taste of MTZ in the in vitro dissolution study carried out in a pH 6.8 artificial salivary medium. The observed release was below the tasting threshold concentration of the model drug.ConclusionIn summary, 3-dimensional extrusion-based printing combines the effects of hot-melt extrusion and fused deposition modeling techniques in a single-step process, demonstrating potential as an alternative to the fused-deposition model 3D printing technique and warranting further exploration.Graphical

Selecting ns2 electron (Sb3+) and d3 electron (Cr3+) co-doped in lead-free halide double perovskite to achieve blue and near-infrared luminescence

The double-perovskite Cs2NaInCl6 has emerged as a highly favored candidate due to its remarkable stability and eco-friendly properties. However, it is noteworthy that this material does not demonstrate the desired optical performance in the crucial visible and near-infrared (NIR) spectrum, which may limit its potential applications in certain domains. We develop such characteristics in Cs2NaInCl6 by co-doping Sb3+ (s-electron) and Cr3+ (d-electron) ions. Doping with Sb3+ allows for 1S0→3P1 transition absorption, which then emits blue photoluminescence of self-trapped exciton (STE). By co-doping Sb3+ and Cr3+ ions, it causes the transfer of excitation energy from STE to Cr3+, yielding strong NIR emission at 950 nm. Temperature-dependent Photoluminescence (PL), PL excitation, PL decay and Tanabe-Sugano diagram provide insight into photophysical processes. Furthermore, a novel dual-modal optical information encryption based on the integration of blue and NIR luminescence printing patterns using Cs2NaInCl6: Sb3+ and Cs2NaInCl6: Sb3+/Cr3+, respectively, is successfully demonstrated.

An Automated Digital Microfluidic System Based on Inkjet Printing.

Cellular interactions, such as intercellular communication and signal transduction, can be enhanced within three-dimensional cell spheroids, contributing significantly to cellular viability and proliferation. This is crucial for advancements in cancer research, drug testing, and personalized medicine. The dimensions of the cell spheroids play a pivotal role in their functionality, affecting cell proliferation and differentiation, intercellular interactions, gene expression, protein synthesis, drug penetration, and metabolism. Consequently, different spheroid sizes may be required for various drug sensitivity experiments. However, conventional 3D cell spheroid cultures suffer from challenges such as size inconsistency, poor uniformity, and low throughput. To address these issues, we have developed an automated, intelligent system based on inkjet printing. This system allows for precise control of droplet volume by adjusting algorithms, thereby enabling the formation of spheroids of varying sizes. For spheroids of a single size, the printing pattern can be modified to achieve a coefficient of variation within 10% through a bidirectional compensation method. Furthermore, the system is equipped with an automatic pipetting module, which facilitates the high-throughput preparation of cell spheroids. We have implemented a 3 × 3 spheroid array in a 24-well plate, printing a total of 216 spheroids in just 11 min. Last, we attempted to print mouse small intestinal organoids and cultured them for 7 days, followed by immunofluorescent staining experiments. The results indicate that our equipment is capable of supporting the culture of organoids, which is of great significance for high-throughput drug screening and personalized medicine.

One‐Step Room Temperature Synthesis of Printable Carbon Quantum Dots Ink for Visual Encryption and High‐Performance Photodetector

AbstractCarbon quantum dots (CQDs) have emerged as promising materials for optoelectronic applications and have garnered much interest as potential competitors to conventional inorganic or hybrid semiconductor quantum dots because of carbon's intrinsic merits of high stability, low cost, and environment‐friendliness. The ability of easy formulation of functional ink of CQDs is necessary for the development of industrial‐scale, reliable, inexpensive printing/coating processes, for its full exploitation in the ever‐growing class of applications in sensors, optoelectronics, and energy storage and conversion. Here a facile one‐step room‐temperature synthesis of printable, fluorescent CQD ink is demonstrated. The as‐synthesized fluorescent CQD ink is used for invisible fingerprint stamps, printing of micro‐patterns, and soft lithographic patterning with a resolution down to 1.5 µm. This functional CQD ink is also used to fabricate a high‐performance CQD‐ZnO heterojunction ultraviolet (UV) photodetector with a photo‐responsivity of 3.85 A W−1, detectivity of 6.78 × 1010 Jones, and an external quantum efficiency (EQE) of 15.3%. The enhanced device performance can be attributed to CQD's high photocurrent generation efficiency and rational combination of the asymmetric electrode materials. This work enables a high‐temperature stable CQD fluorescent ink synthesis method to fulfill the processing requirements of printing and soft lithographic patterning for visual encryption and optoelectronics.

Lip Print Analysis: A Study on Patterns and Forensic Applications

Lip prints are lines, also known as grooves and fissures, on the skin that form at the junction of the labial mucosa and the lip's exterior surface. The study of these lip prints is known as chelioscopy. They are known to follow a pattern, which has been classified into multiple categories by various experts. Suzuki & Tsuchihashi's classification proved to be the most popular. They are also noted for having a few distinguishing characteristics that aid in determining a person's personality. The current study was conducted to examine quadrant-wise patterns and differences between males and females. In our study, the most prevalent lip print in males was type I (32.91%), followed by type 3 (22.50%). In females, type 1 was the most common (39.16%), followed by type 3 (20%). Study found significant variations between males and females in lower lip print patterns.

Textile-based 3D printing and traditional Chinese geometric patterns for fashion textile development

Here, textile-based 3D printing technology is combined with traditional Chinese patterns to create new effects. Traditional Chinese patterns are the main carrier of cultural heritage and have been widely applied as creative design elements to develop unique fashion and textile products. Two geometric patterns inspired by traditional Chinese patterns are developed through the direct deposition of polylactic acid onto polyester fabric. Then the physical and mechanical performances of the printed patterns are examined under a microscope, along with tensile, tear, and joint motion tests. After that, two garment prototypes are created to explore the design aesthetics of the 3D printed geometric patterns. This research work reports on a comprehensive and practical design process for the creation of 3D printed fashion textiles. The work is expected to provide insights for designers and researchers when reviving traditional elements through modern technology. More applications can be explored based on the results reported in this paper.

FREQUENCY OF THE LIP PRINTS TYPE AMONG PASHTUN MALE AND FEMALE STUDENTS OF JINNAH MEDICAL COLLEGE

Objective: To assess the frequency of lip print patterns of pashtun male and female students of Jinnah Medical College. Background: Lip prints are valuable in forensic odontology for personal identification, particularly when other evidence is unavailable. These unique, lifelong patterns vary by population and gender. This study focused on Pashtun male and female students in Peshawar to examine the frequency and distribution of lip print patterns, providing population-specific forensic data. Methods: This cross-sectional study analyzed lip prints of 500 Pashtun students (294 males, 206 females) at Jinnah Medical College, Peshawar, aged 22-28, using convenience sampling. Participants meeting the inclusion criteria (Pashtun ethnicity, current enrollment, and consent) had their lip prints collected with frosted lipstick on bond paper. Prints were classified using Tsuchihashi & Suzuki's method. Statistical analysis was conducted using SPSS 26.0, with chi-square tests for gender associations. Ethical approval and informed consent were obtained. Results: Type II lip prints were the most common (22.4%), with a higher frequency in males (59.8%) compared to females (40.1%), but the p-value (0.66) indicated no significant gender difference. Other types (I, I', III, IV, and V) showed varying frequencies, but none revealed statistically significant differences between genders. Conclusion: No significant gender differences were found in the distribution of lip print types among Pashtun students. Type II lip prints were the most prevalent, slightly more common in males. These findings suggest lip print patterns are not influenced by gender in this population.

Engineered Shape-Morphing Transitions in Hydrogels Through Suspension Bath Printing of Temperature-Responsive Granular Hydrogel Inks.

4D printing of hydrogels is an emerging technology used to fabricate shape-morphing soft materials that are responsive to external stimuli for use in soft robotics and biomedical applications. Soft materials are technically challenging to process with current 4D printing methods, which limits the design and actuation potential of printed structures. Here, a simple multi-material 4D printing technique is developed that combines dynamic temperature-responsive granular hydrogel inks based on hyaluronic acid, whose actuation is modulated via poly(N-isopropylacrylamide) crosslinker design, with granular suspension bath printing that provides structural support during and after the printing process. Granular hydrogels are easily extruded upon jamming due to their shear-thinning properties and their porous structure enables rapid actuation kinetics (i.e., seconds). Granular suspension baths support responsive ink deposition into complex patterns due to shear-yielding to fabricate multi-material objects that can be post-crosslinked to obtain anisotropic shape transformations. Dynamic actuation is explored by varying printing patterns and bath shapes, achieving complex shape transformations such as 'S'-shaped and hemisphere structures. Furthermore, stepwise actuation is programmed into multi-material structures by using microgels with varied transition temperatures. Overall, this approach offers a simple method to fabricate programmable soft actuators with rapid kinetics and precise control over shape morphing.

Ejection and deposition of mica suspension droplets under electric field

Inkjet printing of ceramic materials is a shaping process of interest for building micrometer-sized components. It consists of depositing droplets of colloidal inks according to a printing pattern designed to obtain a given final part. Improving the printed part properties, e.g., thermal or electrical, requires to tailor the printed material's local structure and orientation. Electric field is an efficient external stimulus to control particle orientation. A major challenge is to efficiently couple the effects of electric field and those of capillary, viscous, and evaporation phenomena occurring during inkjet printing. In this paper, the effect of an external electric field on the structuration of inkjet deposits is investigated. Suspensions of mica platelets dispersed in binary mixtures of chloroform and silicone oil are ejected on demand on a glass plate. An electric potential difference is applied by means of a set of electrodes below the glass substrate, separated by a small gap in order to maximize the electric field on the surface of the plate. A cartography of splat morphology and structuration for different inks as a function of applied field is performed. Promising experimental conditions display particle arrangement and limited splat deformation, whereas others lead to fingering. This paves the way to a novel additive shaping process by adding another smaller scale of structuration to inkjet printed parts.

A two-stage defect detection method for unevenly illuminated self-adhesive printed materials

The process of printing defect detection usually suffers from challenges such as inaccurate defect extraction and localization, caused by uneven illumination and complex textures. Moreover, image difference-based defect detection methods often result in numerous small-scale pseudo defects. To address these challenges, this paper proposes a comprehensive defect detection approach that integrates brightness correction and a two-stage defect detection strategy for self-adhesive printed materials. Concretely, a joint bilateral filter coupled with brightness correction corrects uneven brightness properly, meanwhile smoothing the grid-like texture in complex printed material images. Then, in the first detection stage, an image difference method based on a bright–dark difference template group is designed to effectively locate printing defects despite slight brightness fluctuations. Afterward, a discriminative method based on feature similarity is employed to filter out small-scale pseudo-defects in the second detection stage. The experimental results show that the improved difference method achieves an average precision of 99.1% in defect localization on five different printing pattern samples. Furthermore, the second stage reduces the false detection rate to under 0.5% while maintaining the low missed rate.

Identification of decedents by restoring mummified fingerprints: Forensic dermatology in the investigation of mummy dermatoglyphics

Fingerprints are created by elevations and depressions on the fingertip pads. Each person has their own unique fingerprints, which can be used in the identification of that individual when alive, during the immediate postmortem period, or even after the digits have become mummified. Mummification can occur naturally; it can be partial (such as localized to only the hands and feet), extensive, or complete. Obtaining fingerprints after the skin has become mummified can be attempted while the digits remain attached to the hand, but the digits may need to be removed from the hand, and the finger pads may also need to be separated from the underlying bone to secure an adequate fingerprint. The mummified tissue often needs to be rehydrated; numerous solutions have been used that increase the turgor of the digits, provide softening and pliability of the tissue, and enhance the details of the finger pad ridges. An aqueous solution of sodium carbonate (either combined with acetic acid or combined with 95% ethanol and distilled water) was found to be most effective for rehydration. Thereafter, various techniques can be attempted to obtain the fingerprint. These include the traditional method of inking and rolling of the finger or photographing the finger. Powders (such as aluminum powder, black fingerprint powder, white cornstarch-based powder, or fluorescent powder) can be used to enhance the ridge features; adhesive tape can be pressed against the powdered digit and the print pattern preserved by applying the adhesive tape to a clear transparency sheet. Molds (using modeling clay or silicone rubber) and casts (using plaster of paris, dental casting materials, or putty) of the digits can be created; either the molds or the casts or both can be photographed with or without prior application of fingerprint powder. Transillumination, using a fiber optic light source to illuminate the epidermis and underlying remaining dermis of a scraped and defleshed finger pad, can be used to demonstrate the finger ridge pattern when photographing the tip of the digit. Forensic dermatology can play an integral role in obtaining fingerprints from mummified digits, which can be successfully used for the identification of a decedent.

Identification of Fingerprint Pattern and Lip Print Pattern in Females of Type 2 Diabetes Mellitus as a Biomarker

Diabetes mellitus (D.M.) is a chronic metabolic disorder that has increased worldwide. Fingerprints and lip prints are noninvasive procedures that are genetically used in criminal cases and to determine genetic disorders such as Diabetes mellitus type 2. Dermatoglyphics is the epidermal ridge configuration, the ridged skin on our fingertips, palms, and toes. There are three types (Whorl, et al.). Cheiloscopy, derived from the Greek word (cheilos), which means lip, is the study of crinkles and grooves that are perceptible on our lips and unique. We conducted our research with 90 females, 45 were with (DMT2), and 45 were normal females over 30 years old. The samples were collected in different Kurdistan regions (Erbil City, Qaladza Town, Koya Town, and Koya University). We collected all 10 (ten) fingerprint patterns and divided them into Whorl, loop, and arch using an ink pad. Also, lip samples were collected by using lipstick on A4 paper. According to our research, the predominant fingerprints and lip prints in females with type 2 diabetes were loops for both hands (right (31.1%) and left (28.4%)), and for lips, the print was intersected grooves (28.9%). The predominant fingerprint and lip print for normal females were also loops in both hands (right (28%) and left (25%)), and the lip print was complete vertical grooves (42.2%). The study showed no association between fingerprint pattern and diabetes mellitus type 2 and cannot be used as a biomarker for it. However, there is a clear association between lip print pattern and diabetes mellitus type 2, and it can be used as a specific biomarker.

Experimental Characterization of Anisotropic Mechanical Behaviour and Failure Mechanisms of Hardened Printed Concrete.

Extrusion-based printing of cementitious materials represents an innovative technology in civil engineering. The additive manufacturing process significantly influences the material properties in the hardened state, leading to anisotropic behaviour in terms of stiffness and strength compared to conventionally cast concrete. This experimental study aims to deepen the understanding of the mechanical behaviour of hardened printed concrete. Beam-like specimens with varying printing patterns, loading orientations and lengths are investigated within three-point bending tests (3PBT) and uniaxial compression tests (UCT). Homogenized material parameters such as Young's modulus, compressive and flexural tensile strength and density are statistically evaluated using optically measured displacement and strain fields on the specimen surface. The qualitative and quantitative results demonstrate a strong dependency of material properties and failure mechanisms on the printing pattern. The interfilamental and interlayer areas with weak adhesion are identified as the main reason for anisotropy.

Anisotropic mechanical and sensing properties of carbon black-polylactic acid nanocomposites produced by fused filament fabrication

3D-printable conductive polymers are gaining remarkable attention for diverse applications, including wearables, pressure sensors, interference shielding, flexible electronics, and damage identification. However, the relationship between the anisotropy of their mechanical and electrical properties remains rather unexplored. This study focuses on characterizing Polylactic Acid/Carbon Black nanocomposites manufactured through fused filament fabrication. It aims to investigate the effect of the orientation of 3D printing layers on the mechanical properties, failure mechanisms, and self-sensing capabilities of the 3D printed material. To this end, we use a coupled health monitoring system in which electrical resistance measurements are applied to diagnose the damage state of 3D-printed samples during tensile testing. The results provide novel insights into the strong dependence of the material behavior on 3D printing pattern orientation, suggesting avenues for optimizing mechanical and electrical anisotropy through a multi-objective approach. Additionally, they offer guidelines for designing self-sensing components for structural health monitoring applications and strain gauge sensors with superior performance.

ASSOCIATION OF CHEILOSCOPY, DACTYLOSCOPY, AND PALATAL RUGOSCOPY WITH PERMANENT MOLAR RELATIONSHIP IN CHILDREN

Background: To record and study the correlation of the predominance of recorded cheiloscopic, dactyloscopic and palatal rugoscopic patterns with molar relationship in 8-15 years of children in order to determine if there exists any association between them. Material and Methods: 505 children of age group 8-15 years of old with completely erupted 2nd permanent molars upto occlusal table were recruited and angles molar relation was recorded in the proforma. Lip prints of these subjects were recorded with lipstick-cellophane method and middle 10mm of lower lip was analysed for the lip print pattern as suggested by Sivapathasundharam et al. The patterns were classified based on Tsuchihashi and Suzuki classification. The patent prints of finger were recorded in the performa and analysed according to Michael Kucknas method. The palatal rugae was obtained by photographs and alginate impression of the upper arch for each patient and were defined using a sharp graphite pencil under adequate light and magnification and were recorded according to the classification given by Thomas and Kotze classification. Results: In cheiloscopic patterns: Type I pattern was found to be the most predominant cheiloscopic pattern in class I and class III molar relation whereas Type II pattern in class II molar relation. The composite patterns showed the most prominent dactyloscopic patterns in class I and class II molar relation and loop patterns were found as the most prominent in class III molar relation. In case of rugoscopic pattern in class 1 and class 3 molar relation group, the curve pattern showed the most prominent and wavy pattern in class 2 molar relation. No statistical significance was found in all the three parameters. Conclusions:co -relation of the lip, finger and palatal rugae patterns with molar relation might aid in the early diagnosis and interception of malocclusion among paediatric patients as it is easily accessible, economical and non-invasive marker for the aforementioned conditions.Further investigations, may be required on the relationship between cheiloscopic, dactyloscopy and rugoscopic patterns with malocclusion in order to substantiate the findings presented herein.