Protective Glasses Research Articles

Safety During Ureteroscopy: Radiation, Eyes, and Ergonomics.

It is known that urologic surgeons are at risk of work-place injury due to the physical requirements of operating and exposure to hazards. These hazards include radiation, exposure to body fluids, use of laser energy, and orthopedic injury due to the physical nature of operating. The risks that these hazards present can be mitigated by implementing several evidence-based safety measures. The methods to protect against radiation exposure include keeping radiation usage in the operating room as low as reasonably achievable, donning lead aprons, and wearing protective glasses. Additionally, protective glasses decrease the risk of eye injury from laser injury and exposure to body fluids. Finally, practicing sound surgical ergonomics is essential to minimize the risk of orthopedic injury and promote career longevity. The interventions discussed herein are simple and easy to implement in one's daily practice of urology.

Spray Coating Luminescence Layers on Glass for Si Solar Cells Efficiency Enhancement

The article presents experimental research focused on the improvement of solar cells efficiency using the photoluminescence down-shifting effect. In the paper, the authors present the results of solar cells performance enhanced with the proposed solution. As light energy converted active materials, rare earth elements of europium and dysprosium were implemented. In the experiments, luminescent layers were deposited on top of photovoltaic protective glass in order to absorb the highest possible amount of ultraviolet light from the incident solar spectrum. Spray coating deposition technology with various types of ink compositions was used for process optimization. It was observed that there are optimal concentrations and solvent types for the best conversion effect and consequently, the improvement of solar cell external quantum efficiency (EQE) together with the PV cell absolute efficiency enhancement.

Influence of safety glasses, body height and magnification on the occupational eye lens dose during pelvic vascular interventions: a phantom study

ObjectiveBy simulating a fluoroscopic-guided vascular intervention, two differently designed radiation safety glasses were compared. The impacts of changing viewing directions and body heights on the eye lens dose were evaluated. Additionally, the effect of variable magnification levels on the arising scattered radiation was determined.MethodsA phantom head, replacing the operator’s head, was positioned at different heights and rotated in steps of 20° in the horizontal plane. Thermoluminescent dosimeters (TLD), placed in the left orbit of the phantom, detected eye lens doses under protected and completely exposed conditions. In a second step, radiation dose values with increasing magnification levels were detected by RaySafe i3 dosimeters.ResultsChanging eye levels and head rotations resulted in a wide range of dose reduction factors (DRF) from 1.1 to 8.5. Increasing the vertical distance between the scattering body and the protective eyewear, DRFs markedly decreased for both glasses. Significant differences between protection glasses were observed. Increasing magnification with consecutively decreasing FOV size variably reduced the dose exposure to the eye lens between 47 and 83%, respectively.ConclusionThe safety glasses in the study effectively reduced the dose exposure to the eye lens. However, the extent of the protective effect was significant depending on eye levels and head rotations. This may lead to a false sense of safety for the medical staff. In addition, the application of magnification reduced the quantity of scattering dose significantly. To ensure safe working in the Cath-lab, additional use of protective equipment and the differences in design of protective eyewear should be considered.Key Points• Eye lens dose changes with physical size of the interventionist and viewing direction.• The use of magnification during fluoroscopic-guided interventions reduces scattered radiation.

TO DETERMINE THE PREVALENCE AND OCCURANCE OF VISUAL MORBIDITY IN PATIENTS OF PTERYGIUM ATTENDING EYE OPD IN A TERTIARY CARE CENTRE OF EASTERN INDIA

To determine the prevalence and occurrence of visual morbidity in patients of pterygium attending eye opd in a tertiary care centre of Bihar. Methods: In this observational study a total of 193 patients, diagnosed with pterygium, underwent complete ocular examination by an ophthalmologist. Epidemiological trends including age, sex, occupation, effect of living condition and socioeconomic status were analyzed. Results: There is a male preponderance of 58.03%. The age incidence of the group showed that the incidence of pterygium was 10.36% in the age group of less than 30 years. It rises to a maximum of 29.53% in the age of 41-50 years and then gradually declines.. The incidence was found to be maximum among farmers(39.86%) followed by miners(31%). Conclusion: People who work outdoors are at a greater risk because they are subjected to involuntary UVB exposure. The highest exposure occurs during the two hours on either side of noon. Workers must be aware and should take appropriate measures like wearing protective glasses, caps, etc

Eye lens dosimetry in Canadian CANDU nuclear power plants based on operational dosimetric quantities H[formula omitted](10) and H[formula omitted](0.07)

In this article, we present a methodology for performing eye lens dosimetry in CANDU nuclear power plants using an existing and highly accurate Harshaw 4-element TLD-700 dosemeter. This dosemeter, which has been specially designed for Ontario Power Generation (OPG) and Bruce Power (BP), measures the deep and shallow personal dose equivalent quantities Hp(10) and Hp(0.07), respectively. Using these measured personal dose equivalent quantities and applying a beta-ray strength scaling factor to the Hp(0.07) measurement in particular, we have developed an algorithm that can be used to calculate the dose to the lens of the eye in mixed beta–gamma fields. This scaling factor has been developed and is primarily based on results obtained from extensive collaborative study, performed by Ontario Power Generation (OPG), Bruce Power (BP) and McMaster University, through Candu Owners Group (COG) support (Bohra et al., 2021; Laranjeiro et al., 2020). Furthermore, scaling factor F, also includes effects of protective glass eyewear and results from Whole body dosimetry intercomparison exercises. The algorithm to calculate eye lens dose at CANDU power plants has been developed, based on this scaling factor and operational dosimetric quantities Hp(10) and Hp(0.07)

Radiation Reduction and Protection for Radiosensitive Organs (Lens, Thyroid, and Genital Organs) of Patients Receiving Percutaneous Coronary Intervention-Real-World Measurement of Radiation Dose in a Single Center.

Backgrounds: Reducing radiation exposure is the basic principle for performing percutaneous coronary intervention (PCI). Many studies have confirmed the effect of radiation protection for medical staff, but studies about the effectiveness of protection for patients and real measurement of radiation dose in patients’ specific organs are lacking. Aim: To measure the radiation doses absorbed by patients’ radiosensitive organs during PCI and the effectiveness of radiation protection. Methods: A total of 120 patients were included and allocated into three groups as the ratio of 1:1:2. A total of 30 patients received PCI at 15 frames rate per second (fps), 30 patients at 7.5 fps, and 60 patients wore radiation protective hat and glasses during PCI at 7.5 fps. The radiation doses were measured at right eyebrow (lens), neck (thyroid), back (skin), and inguinal area (genital organs) by using thermoluminescent dosimeters (TLDs). Results: Dose-area product (DAP) reduced by 58.8% (from 534,454 ± 344,660 to 220,352 ± 164,101 mGy·cm2, p < 0.001) after reducing the frame rate, without affecting successful rate of PCI. Radiation doses measured on skin, lens, genital organs, and thyroid decreased by 73.3%, 40.0%, 40.0%, and 35.3%, respectively (from 192.58 ± 349.45 to 51.10 ± 59.21; 5.29 ± 4.27 to 3.16 ± 2.73; 0.25 ± 0.15 to 0.15 ± 0.15; and 17.42 ± 12.11 to 11.27 ± 8.52 μSv, p < 0.05). By providing radiation protective equipment, radiation doses at lens and thyroid decreased further by 71.8% and 65.9% (from 3.16 ± 2.73 to 0.89 ± 0.79; 11.27 ± 8.52 to 3.84 ± 3.49 μSv, p < 0.05). Conclusions: By lowering the frame rate and providing protective equipment, radiation exposure in radiosensitive organs can be effectively reduced in patients.

Friction Coefficient of the Coating PG-CP4 Sprayed to 40H13 Steel by Plasma and Processed by Laser

This article deals with laser treatment of plasma spraying of PG-CP4 powder on steel 40H13. A multi-factor model is obtained that relates the friction coefficient of the coating to the radiation power W, the longitudinal feed of the laser beam Spr, and the distance L from the protective glass of the laser head to the sample’s surface. The model allows you to control the modes of laser processing, in order to reduce the friction coefficient of the coating. The greatest influence on the friction coefficient is exerted by the longitudinal feed Spr of the laser beam, followed by the radiation power W and the distance L. A multi-factor model of the friction coefficient of uncoated 40H13 steel treated under the same conditions as coated 40H13 steel is also established. Comparison of the two variants showed that of all the samples providing reliable adhesion of the coating to the substrate, the greatest reduction in the friction coefficient (by 30.2 %) was achieved at W = 5 kW, Spr = 25 mm/s and L = 85 mm. The results of the research are recommended for use in enterprises that implement the processes of plasma and laser processing of materials, as well as in design organizations that develop modern laser systems.

The Calculation and Fitting of Exposure Buildup Factors for Radiation Protection Glasses

The Calculation and Fitting of Exposure Buildup Factors for Radiation Protection Glasses

Применение защитных красных светофильтровых очков как метода предотвращения развития и прогрессирования ретинопатии недоношенных, основанный на феномене прекондиционирующей фотостимуляции

Purpose. To study the possible effect of protective red light filter glasses as a method of preventing retinopathy of prematurity, based on the phenomenon of preconditioning photostimulation. Material and methods. For this study, we selected 20 children (40 eyes) from 26.5 to 36 weeks of gestational age and a birth weight of 650 to 2650 grams. All children were divided into 2 groups – the main and control groups of 10 children (20 eyes) each. Results. In the main group of the study, with the use of protective red light filter glasses, the best indicators of the electroretinogram were noted. Conclusions. The use of glasses with red protective light filters-as a method based on the phenomenon of preconditioning photostimulation, is a simple and affordable method of preventing retinopathy of prematurity, which reduces the need for surgical laser treatment and the number of adverse outcomes of this disease. Key words: retinopathy of prematurity, methods of prevention of retinopathy of prematurity.

Nurses’ Perceptions of Oral Health Care Provision After the COVID-19 Lockdown

ObjectiveThis study aimed to investigate nurses’ perceptions of oral health care provision to inpatients in Japanese hospitals and the infection control measures taken by them after the coronavirus disease 2019 (COVID-19) lockdown to promote collaborative oral health care.MethodThe participants were 1037 nurses working in inpatient wards at 4 hospitals in Fukuoka Prefecture, Japan. Data were collected through a questionnaire survey approximately 6 months after the first COVID-19 lockdown.ResultsMore than 90% of the 734 nurses participating in this study positively perceived the preventive effect of oral health care on aspiration pneumonia, ventilator-associated pneumonia, and viral infection. However, approximately half of them had negative perceptions about their knowledge and confidence regarding the control of COVID-19 with oral health care provision, and 84.7% expected to be provided with the necessary information by oral health professionals. Further, 537 nurses (73.2%) provided oral health care to their patients; 9 nurses (1.7%) responded that those patients who received oral health care decreased after the lockdown; and 12 (2.4%) responded that they could no longer collaborate with oral health professionals because of the lockdown. Additionally, 41.7% of them used neither protective glasses nor face shields even after the lockdown began.ConclusionsThis study showed that almost all the nurses perceived the benefcial effect of oral health care for the prevention of viral infection and pneumonia. However, some nurses perceived that their oral health care provision and collaborative oral health care were negatively affected. It also showed that most nurses’ knowledge, confidence, and use of infection control measures were insufficient. The results indicate that oral health professionals should support nurses in providing oral health care by providing them with information on COVID-19 infection control measures to prevent infection transmission.

Modeling of optical properties of plasmonic core–shell nanoparticles embedded in glass for filtering of solar radiation

The computer results of optical properties of core–shell nanoparticles embedded in glass have been presented for the selection of their parameters for effective filtering and extinction of solar infrared energy. Optical properties of TiO2-Au, Fe3O4-Au, NiO-Au, SiO2-Au particles are theoretically investigated and analyzed in the spectral interval 200–2500 nm.Core–shell SiO2-Au nanoparticles have been selected for following investigation on the base of their more appropriate optical properties in visible spectrum in comparison with others. Influence of nanoparticle parameters (radii, shell thicknesses, concentrations) on their optical properties (efficiency factors of absorption, scattering, extinction and their correlations, scattering indicatrixes, optical transmittance of nanostructured glass layer) has been investigated. It was established, that spherical SiO2-Au nanoparticles with the core radii of about 60-80 nm, shell thicknesses 5, 10 nm and concentrations ∼109-1010 cm−3 embedded in glasses can be applied for effective extinction of infrared solar radiation. The medium transmittance of nanostructured glasses with nanoparticles can be achieved 70%–80% and more in visible spectrum that is sufficient for appropriate visibility. These results can be used for the development of nanostructured energy protective glasses that prevents the penetration of infrared solar energy inside buildings or cars.

Modeling and practical implementation of motion controller for stable movement in a robotic solar panel dust-removal system

ABSTRACT Solar panels typically consist of photovoltaic (PV) cells covered by a protective glass coating, which generate electricity when subjected to radiation. However, the capability of electricity generation is constrained due to the layer of dust on PV modules. Especially in tropical weather areas such as Vietnam, the frequent cleaning of solar panels is required. In contrast with the conventional method of the cleaning module, this paper investigates the analysis and modeling of a mechanical platform of a robotic solar panel dust-removal system. According to the mechanical structure and motion mechanism, five hypotheses which simplify the robot–rails system as a double mass–spring–damper model are proposed. The governing motion equations of the robot during the traveling journey are established, and then the proposed schemes to both stabilize the system motion and track the desired trajectory are introduced. In the first stage, anti-vibration movement can be achieved via the dynamic analysis of whole system body. Later, the Linear Quadratic Regulator (LQR)-control scheme is investigated in order to drive this system to track the desired trajectory. Based on these designs, the simulation works on a computer and experimental tests are built to test its effectiveness and reliability in terms of automation, dust-removal effectiveness and control technique. The first test case is used to validate the robot’s movement on rails, while the second one studies the system’s motion when reaching the gap between two adjacent panels. From the results of numerical simulations and experiments, it is demonstrated that the system performance is significantly improved in the second test case, although there is a small difference in the first case between scenarios with and without the proposed schemes. From these results, it can be well-established that our approach is proper, robust and feasible for a robotic system in cleaning applications.

Ocular characteristics and complications in patients with osteogenesis imperfecta: a systematic review.

PurposeOsteogenesis imperfecta (OI) is a rare inherited heterogeneous connective tissue disorder characterized by bone fragility, low bone mineral density, skeletal deformity and blue sclera. The dominantly inherited forms of OI are predominantly caused by mutations in either the COL1A1 or COL1A2 gene. Collagen type I is one of the major structural proteins of the eyes and therefore is the eye theoretically prone to alterations in OI. The aim of this systematic review was to provide an overview of the known ocular problems reported in OI.MethodsA literature search (in PubMed, Embase and Scopus), which included articles from inception to August 2020, was performed in accordance with the PRISMA guidelines.ResultsThe results of this current review show that almost every component of the eye could be affected in OI. Decreased thickness of the cornea and sclera is an important factor causing eye problems in patients with OI such as blue sclera. Findings that stand out are ruptures, lacerations and other eye problems that occur after minor trauma, as well as complications from standard surgical procedures.DiscussionAlterations in collagen type I affect multiple structural components of the eye. It is recommended that OI patients wear protective glasses against accidental eye trauma. Furthermore, when surgery is required, it should be approached with caution. The prevalence of eye problems in different types of OI is still unknown. Additional research is required to obtain a better understanding of the ocular defects that may occur in OI patients and the underlying pathology.

Occupational Radiation Dose, Especially for Eye Lens: Hp(3), in Medical Staff Members Involved in Computed Tomography Examinations

Radiation dose management of medical staff has become increasingly important. Particularly, based on the statement by the International Commission on Radiological Protection (ICRP) in 2011, a new lower equivalent dose limit for the eye lens is being established in each country. Although many reports have discussed the occupational radiation dose in interventional radiology (IR), few studies have examined the dose during computed tomography (CT) examinations. This study investigated the radiation dose exposure to medical staff present in the CT room during irradiation, with particular focus on the exposure to eye lens. The radiation dose exposure to those who assist patients during head, chest and upper abdomen CT examination was measured in a phantom study. The radiation dose exposure with scattered radiation was never negligible (i.e., high); Hp(3) was the highest in head CT examination, at 0.44 mSv per examination. Furthermore, the shielding effect of radiation protection glasses was large, and radiation protection glasses are useful tools for the medical staff who are involved in CT examinations. The justification and optimisation should be carefully considered in assistant actions.

Optically stimulated luminescence dosimetry on mobile phone back protective glass

Protective glasses from the back of modern smartphones were tested as potential emergency dosimeters using optically stimulated luminescence (OSL). The glasses were shown to exhibit several favorable dosimetric properties including a strong sensitivity to radiation, a linear dose-response relationship from 0.1 to 8 ​Gy, a 3% reproducibility, and a minimum detectable dose in the low tens of milligray, even after significant fading. The OSL signal was observed to lose ~78% and ~90% of the original intensity over 1 ​h and 1 week, respectively; however, a fading curve was developed to correct for any such signal loss. A dose-recovery test demonstrated that reconstructed doses were capable of accuracies within 20%.

Elasticity Modulus and Hardness of Bearing Steel after Laser Treatment

The article considers the effect of laser treatment of bearing steel on the change in the elasticity modulus and hardness of the steel SHH15SG. Multi-factor models were obtained that relate the output parameters to the power W of laser radiation, the longitudinal feed Spr of the laser beam and the distance L from the protective glass of the focusing head to the workpiece surface. According to the degree of reduction of the influence on the elastic modulus of steel SHH15SG subjected to laser treatment, these factors are arranged in a sequence: W, Spr, and L. With increasing W and L the modulus of elasticity and hardness of the treated surface layer increase. 3M-XYZ surface-graphs, 3M-XYZ contour-graphs of interactive influence of independent factors on the elastic modulus and hardness of the surface layer are constructed, which simplifies the procedure for assigning the processing mode. The research results are useful for manufacturing and design companies that implement laser technologies and create laser equipment.

Preview the Products on Display at Display Week 2021

Preview the Products on Display at Display Week 2021

Fire Protective Glass Fiber Reinforced Concrete Plates for Steel Structures under Different Types of Fire Exposure

In a situation where a fire occurs either in a tunnel with a burning vehicle carrying petroleum products, at an offshore platform, or at an oil and gas asset to be protected, such a case is commonly described using a hydrocarbon fire curve. Therefore, it is extremely important to design construction, which can maintain stability and bearing capacity both under the standard and hydrocarbon fire modes. The purpose in this work is to hold a behavior simulation of a steel structure with fireproofing ensured through lightweight concrete slabs reinforced with fiber glass as well as a validation of the outcomes by assessing the experimental findings obtained from the relevant fire tests. A fire resistance study was carried out here for steel structures with a profile ratio of 156 mm−1 for the cases of a standard fire and of a hydrocarbon fire. A constant static load of 687 kN (70 tf) was taken for standard fire and 294 kN (30 tf) for hydrocarbon fire; the column was under vertical compression with one end resting on a hinged support and the other end rigidly fixed. The specimen design incorporated single-layer box-section cladding made of Pyro-Safe Aestuver T slabs, 40 mm thick and of a 650 kg/m3 density, pre-cut to fit the column size. The column strength loss (R) ultimately occurred after 240 min in the standard fire case and after 180 min in the hydrocarbon fire case. As the breach in the fireproofing structural integrity (E) or the installation accuracy cannot be considered, the limit state indicators may show certain discrepancies. According to the simulation performed using SOFiSTiK software, the design fire resistance rating of the structure in a hydrocarbon fire case was 58% higher than the figure obtained by holding fire tests due to the slabs cracking during the experiment session; the discrepancy between the outcomes of the session and the simulation in a standard fire case was as much as 15%.

Морфологические особенности и элементный состав пылевого загрязнения фотоэлектрического модуля

In this work, scanning electron microscopy and X-ray energy dispersive analysis methods were used to study the morphology and composition of dust and dirt that accumulates on the protective glass surface of the photovoltaic module. These modules are located in the local Tashkent area. It is shown here that the sizes of the inorganic particles varied from 2 μm to 75 μm, while the organic particles are up to several millimeters in size. The inorganic dust component consists of particles with different shapes, while the organic dust is characterized by a fibrous structure in which holes and micropores were found. Elemental composition studies have shown significant differences between samples of inorganic and organic origin. Analysis of the elemental composition showed a high weight fraction of oxygen, indicating its chemical bonding in compounds with silicon, calcium, carbon and iron, which suggests the presence of these elements in the form of stable oxides. It is shown that organic pollution components contains oxygen, carbon, nitrogen and phosphorus, which may indicate a high content of organic compounds in the form of plant fibers and oxides; the last two elements are characteristic of bird waste products. These studies that were carried out to determine the morphological features and to quantitatively analyze the composition of the dust and dirt that accumulates on the protective glass surface of the photovoltaic module allows us to conclude that the search for methods for preventing and cleaning this accumulation on the front surface of the modules should be targeted for particles of inorganic origin with longitudinal dimensions of up to 30 μm and at the same time it is necessary to look for ways to deterio- rate their adhesive properties. Another important conclusion in the case of organic pollution is that the organic compounds found in bird droppings are in a water-soluble form, which allows you to clean the surface of photovoltaic modules without the use of special detergents.

High-capacity syringe: A useful instrument to prevent backspray during intralesional injections

The prevention of backspray during intralesional injections is very challenging, especially in circumstances where there is a lack of personal protective equipment, such as face masks and protective glasses.