Glass Tiles Research Articles

Overview of Dengue Hemorrhagic Fever in Kebayoran Lama

Dengue Hemorrhagic Fever is a vector-based disease still a significant problem in Indonesia. For two years, the Kebayoran Lama Selatan Sub-District has been in the first position of cases in the Kebayoran Lama District. This study aims to find out the distribution of dengue incidence based on individual characteristics (age, sex, education, knowledge, attitudes) and environmental factors (presence of mosquito larvae, water reservoirs (TPA), lighting, humidity, presence of wire netting, and presence of larvae-eating fish. This research is descriptive with a research design case study in June 2022. The population was DHF sufferers in 2020-2021. The sampling technique uses the technique of total sampling. Data collection was carried out through interviews, observation, and direct measurements. The results were 52.6% of patients with female sex, 52.6% of patients with an age range ≥15, 36.8% of patients with elementary school education, 73.7% had a good level of knowledge, 78.9% had a good attitude, 52.6% found mosquito larvae, 89.5% did not close the water reservoir, 57.9% did not have wire mesh in the ventilation, 100% did not have larvae-eating fish, 52.6% lighting did not meet the requirements, and 100% humidity did not meet the criteria. Based on the results of the study, it is recommended to routinely drain the TPA once a week, close the TPA both inside and outside the house, install wire mesh on the ventilation, use a humidifier to regulate humidity, install glass tiles, and maintain environmental cleanliness as a form of prevention of DHF.

Experimental and numerical investigation on the ballistic performance of aluminosilicate glass with different nosed projectiles

An experimental-numerical investigation on the ballistic perforation of aluminosilicate glass tiles is presented in this study. A gas gun has been used to launch steel projectiles with assorted nose shapes including flat, spherical, and conical into aluminosilicate glass tiles. It is found that the residual velocity of projectiles and the fragmentation behavior of glass are strongly affected by the shape of the projectile nose. A coupled FEM-SPH numerical model is built to reproduce the ballistic impact behavior of aluminosilicate glass. The Johnson-Holmquist Ⅱ (JH-2) constitutive model is utilized to describe the rate-dependent mechanical behavior of the glass tiles. The glass tile model adopts the transformation of the finite elements into smoothed-particle hydrodynamics (SPH) elements when the failure criterion is met. This numerical method was validated by comparing with quasi-static compression, Brazilian tension, three-point-bending and dynamic SHPB tests data. The ballistic results from the numerical simulations are compared with experimental data showing good performance in predicting the projectile residual speed, glass tile inelastic deformation and fragmentation process. Finally, the effect of projectile deflection angle and tile thickness on the ballistic behavior of glass is investigated via the proposed model numerically.

Numerical modelling of the mechanical behaviour of Aluminosilicate Glass: A comparison between two simulation approaches

This paper presents a comparison between two numerical methods for modelling the mechanical and failure behaviour of aluminosilicate glass: Cohesive Elements Method (CEM) and Finite Element Method coupled to Smooth Particle Hydrodynamics (FEM-SPH). The failure behaviours, provided by these two approaches, are herein compared under i) quasi-static tests on material coupons, ii) dynamic tests (compressive and tensile tests) also on material coupons and iii) structural impact loading conditions in which the ballistic perforation of aluminosilicate glass tiles due to the impact of a flat-nosed steel projectile are considered. Both methods provide comparable results under quasi-static loading conditions, while more significant differences arise in the ballistic impact part, in which some limitations of CEM are shown.

Glass tile application in the Rostov region

The article considers glass shingles as a modern material in construction, offers a new look in comparison with traditional roofing material. The authors describe in details the advantages of glass tiles, their production and basic properties. Its environmental friendliness, durability, high strength and resistance to various weather influences are noted.

Development of a Novel Highly Granular Hadronic Calorimeter with Scintillating Glass Tiles

Based on the particle-flow paradigm, a new hadronic calorimeter (HCAL) with scintillating glass tiles is proposed to address major challenges from precision measurements of jets at the future lepton colliders, such as the Circular Electron Positron Collider (CEPC). Tiles of high-density scintillating glass, with a high-energy sampling fraction, can significantly improve the hadronic energy resolution in the low-energy region (typically below 10 GeV for major jet components at Higgs factories). The hadronic energy resolution of single hadrons and the effects of key parameters of scintillating glass have been evaluated in the Geant4 full simulation, followed by the physics benchmark studies on the Higgs boson with jets in the final state. R&D efforts of scintillating glass materials are ongoing within a dedicated collaboration since 2021 with the aim to achieve a high light yield, a high density, and a low cost. Measurements have been performed for the first batches of scintillating glass samples including the light yield, emission and scintillation spectra, scintillation decay times, and cosmic responses. An optical simulation model of a single scintillating glass tile has been established to provide guidance in the development of scintillating glass. Highlights of the expected detector performance and the latest scintillating glass developments are presented in this contribution.

Effect of optimized photoluminescence on luminous and passive cooling potential: A new combined experimental and numerical approach applied to yellow-emitting glass tiles

In this study, photoluminescent glass tiles with different content of yellow-emitting pigments are tested as a promising adaptive strategy for investigating their potential for lighting energy saving and passive cooling in the built environment. The capability of such materials to re-emit light after a certain solicitation period has indeed gained increasing attention as an innovative solution to reduce building energy consumption and mitigate the urban heat island phenomenon. Following this line, photoluminescence is here studied through spectrophotometric and spectroradiometric measurements, during both its charging and decay phase. Analytic corrections are then applied for the first time to isolate only the photoluminescent effect from the overall experimental data. Results demonstrate how higher contents of photoluminescent pigments do not always correspond to the best performance: tiles with an intermediate concentration provide for the longest afterglow decay time (up to 79 min) and the highest reduction in solar energy absorption (up to 26.8 W/m2).

Assessment of the deformation behavior of a tensegrity floor through photogrammetry

Tensegrity structures are interesting elements that can be used to create innovative building components. In this work, the deformation behavior of a new type of tensegrity floor (patent n. 0001426973) was investigated through image analysis and photogrammetry, using stereoscopic algorithms. The main innovation of the proposed tensegrity floor is the structural cooperation between glass tiles and steel components, obtained using suitable adhesive joints. In order to evaluate the deformation of the floor under different loading conditions a non-contact measurement system was developed and validated on a scale prototype of the floor. The used method is a stereoscopic optical technique based on the grid method, the validation was performed comparing the measured displacement with the one measured in the same floor with linear displacement sensors. The stereoscopic images were processed with Matlab®, furthermore, a combination of interpolation algorithms were employed to generate the full-field map of the displacement. Two configurations of the floor (with and without the adhesive joints) and three loading conditions were investigated. The analysis demonstrates that the adhesive joints produce a reduction of the overall deflection of the floor of about 60%, falling within the admissible values established by Italian building code. The measurement system is reasonably accurate and can be used in future applications where linear transducers cannot be installed.

Recovering trace reptile DNA from the illegal wildlife trade

PurposeThe Illegal Wildlife Trade (IWT), aided by improved global transport, and the expansion of the internet, has facilitated the international demand for exotic reptiles. The risks associated with trafficking of live reptiles requires robust forensic techniques for detecting housed or transported animals. Detection of species of high IWT demand can be challenging due to the illicit nature of the trade, particularly when a specimen is missing. The ability to detect trace DNA in empty holdings and transport containers can be pivotal as a source of evidence. MethodsVivaria, containing either a corn snake (Pantherophis guttatus) or boa (Boa constrictor), were set up and monitored for 24 h simulating reptile holdings. Once removed, Diamond Nucleic Acid Dye™ (DD) was sprayed on experimental glass and plastic tiles recovered from within the vivaria, and trace DNA was visualized using a Polilight. Trace DNA was amplified using a novel reptile target specific qPCR assay and sequenced to identify both species. ResultsMovement patterns and scale imprints associated with reptile contact were visible on experimental tiles after DD-staining. Successful qPCR amplification and subsequent bi-directional Sanger sequencing confirmed the presence of both the species in the respective vivaria. DNA recovered from glass tiles had significantly greater amplification success than plastic tiles. ConclusionsDD revealed valuable information about the presence, and movement, of reptiles in the absence of a specimen. Successful amplification of trace reptile DNA demonstrated that this approach could offer an effective tool for biosecurity staff to rapidly identify live reptiles in the IWT.

Hubungan Pencahayaan Rumah Dengan Kejadian Tuberkulosis Paru Di Wilayah Kerja Puskesmas Tonjong Kabupaten Brebes Tahun 2021

Tuberculosis is an infectious disease caused by the bacteria mycobacterium tuberculosis which spreads through the air and is transmitted through droplets when a person coughs, sneezes, talks, and spits anywhere. Tuberculosis is still a disease with a high level of morbidity, accompanied by very easy transmission, namely through the air. Therefore, this tuberculosis disease must be handled immediately and carefully if cases are found in an area. The purpose of this study was to determine the relationship between house lighting and the incidence of pulmonary tuberculosis in the working area of ​​Tonjong Health Center, Brebes Regency. This research method is analytical research. The method used in this research is a survey method which is carried out by distributing questionnaires and direct interviews to respondents with a cross sectional study approach. The data obtained were analyzed statistically using the Chi-Square test. From the statistical test results, it was found that the p-value = 0.002, this means that it is smaller than the value of α = 0.05. So it can be concluded that H0 is rejected, meaning that there is a significant relationship between home lighting and the incidence of pulmonary tuberculosis in the work area of ​​the Tonjong Community Health Center, Brebes Regency in 2021. In connection with the results of this study, it is hoped that the community will be able to improve the condition of the house according to the criteria for a healthy house. Such as the addition of ventilation holes, glass tiles. This is because the addition of ventilation can affect sufficient lighting intensity and reduce high humidity levels

Urban cloverleaves: origin, aesthetics, and contradictions of the Slussen, Stockholm

On 11 October 1935, the inauguration of the Slussen urban cloverleaf took place in front of the excited citizens of Stockholm. It had the attributes of a pure traffic machine taken from the most advanced traffic engineering publications, and it expressed the optimistic cultural modernism that five years ago the Stockholm International Exhibition had promoted.1 This urban cloverleaf was made of translucent glass, reinforced concrete, metallic handrails, and reflective tiles and was meant to solve, in one single gesture, the complex urban link between the Lake Mälaren and the Baltic Sea, between Gamla Stan – the historic city centre – and Södermalm – the southern district built on top of the 35-metre-high plateau [1]. The solution made difficult urban compromises between the foothills of the Brunkeberg topography, the smooth water surfaces of the Stockholm archipelago, the architecture of the historic urban tissue, and the demands of a complex articulated mobility. Boats, goods, suburban trains, subways, trams – later buses – pedestrians, cyclists, and automobiles finally converged on this place at different levels, completing the intricacies of a threedimensional geometry which, for the first time in history, was inserted into a compact city.

Experimental and numerical investigation of hybrid armor against a ballistic impact

PurposeThe main challenge in preparing body armor is achieving a high protection level by using lightweight materials with minimum cost.Design/methodology/approachIn this study, a three-hybrid multilayered armor system is prepared for protection against a ballistic impact wave. These armor systems consist of glass or ceramic tile as a front layer followed by three intermediate layers made of woven fiber reinforced polymer composites and a back layer made of either aluminum or polypropylene.FindingsAll armor systems were successful in impeding the projectile from perforating, that is materials selection played an important role in stopping the ballistic impact wave. Almost an identical ballistic behavior was recorded between the experimental and numerical simulation by using ANSYS AUTODYN which means that the simulation could be used in advance to reduce the time required for practical experiments and the cost of using materials in experimental tests will be lessened. The effect of projectile geometry also had been studied, and it showed a noticeable role in changing ballistic behavior.Originality/valueThe originality of this research is in using carbon and glass fiber which are woven together in addition to adding polypropylene layers in armor preparation.

Soiling Effect Mitigation Obtained by Applying Transparent Thin-Films on Solar Panels: Comparison of Different Types of Coatings.

Dust accumulation on the front cover of solar panels is closely linked to location and orientation of photovoltaic (PV) installation. Its build-up depends on the module tilt angle, frequency of precipitation, humidity, wind strength and velocity, as well as grain size. Additionally, soil composition is determined by solar farm surroundings such as local factories, agricultural crops, and traffic. Over time, molecules of atmospheric dust agglomerate on top of each other and cause gradual reduction in generated energy. Manual cleaning techniques are required to restore working conditions of PV installation to their original conditions; however, they are time consuming and may lead to damage of the glass coverage. Therefore, implementing a different approach by utilizing self-cleaning and anti-dust coatings on front covers of module surfaces is thought of as a competitive manner of cleansing. Based on the varying properties of such thin-films, a division was made into hydrophobic, hydrophilic, and anti-dust coatings. In this article, the authors would like to present a comprehensive review of those types of transparent films. Moreover, a few hydrophobic coatings available on the Polish market were analyzed by applying them on glass tiles and covering them with three types of dust.

Modeling Laminar-to-Turbulent Transition in the Panel Test Facility Arcjet

A computational fluid dynamics (CFD) laminar-to-turbulence transition model was developed for the NASA Ames Research Center’s 20 MW Panel Test Facility (PTF). Surface pressure, heat flux to a water-cooled plate, and surface temperature on a tile plate coated with reaction-cured glass were measured across several conditions in the facility and compared with laminar and fully turbulent CFD simulations. The potential for bypass transition in the PTF nozzle was assessed via application of the Langtry–Menter four-equation transitional shear-stress transport (SST) model. Results from the transition model were inconsistent with measurements. Flow interaction with a boundary-conditioning plate feature inside the nozzle was also investigated as a potential source of laminar-to-turbulent transition, using two turbulence models with specified transition locations. The Baldwin–Lomax turbulence model was configured to simulate a transition at the upstream edge of the boundary conditioning plate and produced results consistent with the surface pressure measurements, but not the cold-wall heat flux. Finally, the SST turbulence model was calibrated to transition at the upstream edge of the boundary conditioning plate and produced results consistent with both the surface pressure and cold-wall heat flux measurements. The SST-based model demonstrated reasonable agreement with surface temperature measurements on the reaction-cured glass tile, albeit with some discrepancies.

Investigation into different numerical methods in predicting the response of aluminosilicate glass under quasi-static and impact loading conditions

This paper presents a comparison of three numerical approaches for modeling brittle materials in both quasi-static and dynamic loading conditions. These methods include the Finite Element Method coupled to Smooth Particle Hydrodynamics (FEM-SPH), Discrete Element Method (DEM) and the elastic bond-based Peridynamics (PD). Numerical models for each method were built in the commercial software LS-DYNA. The parameters, associated to the mechanical behavior of aluminosilicate glass, were calibrated for each numerical model by means of experimental tests on material coupons. The experimental results from quasi-static three-point bending tests and ballistic impact tests were utilized for numerical models’ assessment. All methods provide comparable results under quasi-static flexural loading condition and for ballistic impact cases, the numerical results show the particular capability of each approach to capture the projectile residual velocity and the damage morphology of aluminosilicate glass tiles. However, considering all the loading conditions the FEM-SPH method replicates the mechanical response of aluminosilicate glass best.

Chewing Performance Calculator: An interactive clinical method for quantifying masticatory performance

Statement of problemThere is a need to quantitatively differentiate between impaired and normal mastication by using straightforward and reliable methods because currently available methods are expensive, complex, and time-consuming. PurposeThe purpose of this clinical study was to assess the reliability, validity, and clinical utility of a new Web-based software program designed to calculate masticatory performance, the Chewing Performance Calculator (CPC) measuring masticatory performance (MP), by analyzing the area of mixed bicolored chewing gum. Material and methodsOne hundred and ten participants were consecutively recruited from the School of Dentistry of the University of Salamanca. MP was determined by using 2-colored chewing gum that was masticated for a total of 20 strokes. The masticated gum was then flattened between 2 transparent glass tiles, generating a 1-mm-thick specimen that was scanned to calculate the percentage of area where the 2 colors were mixed. The area was calculated by using a photo-editing software program as described by Schimmel et al (standard method). In addition, all the images were analyzed by using the CPC Web application, which took as input the image of the masticated bolus enclosed in a custom plastic platen that allowed 3 parts of the image to be selected interactively: the platen, the bolus background, and the mixed color fraction of the bolus. The application then computed MP as a percentage. Additionally, an oral examination was carried out to record the number of occlusal units. These data were used to assess the validity of CPC by using the Pearson correlation coefficient. Construct validity was assessed by using ANOVA by comparing the MP scores obtained for masticated gums, classified upon inspection as being poorly, moderately, or highly mixed. The time spent evaluating the specimens with GSM and CPC methods was also recorded and used to indicate the usefulness of the procedure. ResultsThe MP was found to range between 5.2% and 100% (95% CI: 80.8–88.8) with the GSM and between 9.2% and 96.4% (95% CI: 60.0–67.6) with the CPC. The time needed to calculate MP by using the GSM was significantly higher (235.2 versus 260.5 seconds) than that with the CPC (42.3 to 48.6 seconds). Both methods were significantly intercorrelated (r=0.65; P<.001) and correlated with the number of occlusal units (r=0.54 for CPC and r=0.40 for GSM). The correlation coefficient of MP calculated by using CPC (r=0.54; P<.001) was greater than that calculated by using GSM (r=0.40; P<.001). Moreover, both methods showed adequate construct validity because the values calculated for MP significantly increased as the mixing of the masticated gums also increased, subjectively classified as poor, moderate, and high. ConclusionsThe CPC software program allowed MP to be determined in a valid and easy-to-use manner by using 2-colored chewing gum.

Inhomogeneous FEM model for fracture simulation of aluminosilicate glass

Aluminosilicate glass possesses excellent mechanical and functional properties. It combines relatively low density, high hardness and strength in compression. However, the very low tensile strength and inherent brittleness are main concerns to its application. Due to the presence of microheterogeneity and randomly distributed surface flaws, the mechanical strength and failure mechanisms of silicate glasses varies considerably, even for the same glass products. In the present work, inhomogeneous FEM models were proposed and utilized to simulate the discrete failure strength and replicate the multiple crack patterns of aluminosilicate glass. Special attention was paid to the quasi-static three-point bending and ballistic impact loading conditions in this paper. The results from experiments and simulations were compared in detail and show that both the failure strength and fracture modes can be reproduced properly via the proposed numerical models both for three-point bending tests and for ballistic impact conditions. In the latter both the predicted residual velocity of projectile and the fragmentation behavior of glass tiles from the inhomogeneous FEM method show better matching than the homogeneous models.

Properties of Glass Melting Using Recycled Refused Coal Ore

In this study, the glass melting properties are evaluated to examine the possibility of using refused coal ore as replacement for ceramic materials. To fabricate the glass, refused coal ore with calcium carbonate and sodium carbonate in it (which are added as supplementary materials) is put into an alumina crucible, melted at 1,200 ~ 1,500 °C for 1 hr, and then annealed at 600 °C for 2 hrs. We fabricate a black colored glass. The properties of the glass are measured by XRD (X-ray diffractometry) and TG-DTA (thermogravimetry-differential thermal analysis). Glass samples manufactured at more than 1,300 °C with more than 60 % of refused coal ore are found by XRD to be non-crystalline in nature. In the case of the glass sample with 40 % of refused coal ore, from the sample melted at 1,200 °C, a sodium aluminum phosphate peak, a disodium calcium silicate peak, and an unknown peak are observed. On the other hand, in the sample melted at 1,300 °C, only the sodium aluminum phosphate peak and unknown peak are observed. And, peak changes that affect crystallization of the glass according to melting temperature are found. Therefore, it is concluded that glass with refused coal ore has good melting conditions at more than 1,200 °C and so can be applied to the construction field for materials such as glass tile, foamed glass panels, etc.

KAJIAN FAKTOR LINGKUNGAN PERUMAHAN PENDERITA ISPA PADA BALITA DI WILAYAH KERJA PUSKESMAS IHA KECAMATAN HUAMUAL KABUPATEN SERAM BAGIAN BARAT

In Maluku since 2009 Upper Respiratory Tract Infection disease was the highest disease in Maluku Health Center, with the number of cases increase until 2012. This study aims to describe the density of housing, type of floor and house ventilation with the incidence of ARI in infants. The research method is descriptive research with univariate analysis. The results showed that occupancy density, type of floor and house ventilation that did not meet the requirements showed a higher number of ARI cases compared to residential density, type of floor and house ventilation that met the requirements. It is recommended for the Puskesmas to provide more information or health education. For people who own a house with humidity, temperature, and natural lighting that is not of a good size and location, it is expected to be able to add glass tiles and repair ceilings, and open doors and windows every morning. For families with spacious but dense house occupants a spacious but dense house occupants in toddler, rooms to make use of other rooms that can be used as bedrooms.&#x0D; Keywords: Blood glucose levels, diet, knowledge, diet, medication, physical activity

Sphere on tile ballistic impact experiment to characterize the response of soda lime glass

Robust computational models of soda-lime silicate glass (SLG) are used in the development of transparent armor systems, which require an independent set of experimental data with known boundary conditions for model validation. Although many experimental tests are presented in the literature, many of these tests incorporated complex boundary conditions or studied the impact of non-planar targets. A novel sphere on glass tile ballistic experiment was performed to quantify the damage features of planar impact, where an unconfined tile was impacted by a hardened steel sphere at velocities ranging from 100 m/s to 800 m/s. The impacts and resulting damage were recorded using high speed cameras.Projectile kinematics and damage front propagation were successfully quantified and shown to be repeatable. A broad range of material damage was captured, including discrete fracture features such as fracture cones, radial cracks, concentric cracks, and material comminution. Three distinct impact responses were identified; non-perforating (100–500 m/s), transition (500–550 m/s) and perforating (550–800 m/s) that showed a transition in failure mode from discrete fracture (damage front ∼1500 m/s) to comminution (damage front, 3270 m/s) of the tile upon impact. The sphere on glass tile tests provided a repeatable set of experimental data to enable future comparison of the ballistic response of transparent materials, while providing simple boundary conditions that can be used to validate computational models of SLG over a range of impact velocities.

Effects of Social and Self Stigma on Adolescent Tuberculosis Patients

Patient N is 12 years old, suffering from positive AFB pulmonary TB/Tuberculosis (there are 3 microbes in 100 fields of view). This patient has the potential to transmit the disease to others because N does not want to use masks during the intensive phase of TB treatment. This is because the patient is embarrassed and afraid to be excluded fromherfriends. At present, the patient is a freshman in junior high school.The patient lives with both her parents and brother. Her parents worked at odd jobs. Her younger brother is 10 years old. The last education of N's parents were junior high school graduates. This family lives in a house about 100 m2 in size. Some of the cement floors are partly ceramic and brick walls. The condition of the home environment is very windy, so some windows are covered with boards. N sleep in rooms that do not have windows and no glass tiles, so sunlight cannot enter the N's room. The condition of the house is quite clean, but in some rooms, it seems dark, windowless and not exposed to sunlight.