Journal articles: 'VISORS'

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Boley, Aaron C., Ewan Wright, Samantha Lawler, Paul Hickson, and Dave Balam. "Plaskett 1.8 m Observations of Starlink Satellites." Astronomical Journal 163, no. 5 (April 7, 2022): 199. http://dx.doi.org/10.3847/1538-3881/ac5599.

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Abstract We present observations of 23 Starlink satellites in the g′ bandpass, obtained from the Dominion Astrophysical Observatory’s Plaskett 1.8 m telescope. The targets include a mixture of satellites with and without brightness mitigation measures (i.e., visors). At the time of the observations (2021 July 16), Starlink satellites were sunlit throughout the night, and, even with strict elevation and azimuth limits, there were over 800 candidate Starlink arcs. The satellites altogether have a median range corrected brightness (550 km) of H ¯ g 550 = 5.3 mag. Dividing the targets into those without and with visors, their median range corrected magnitudes are H ¯ g 550 ( no visor ) = 5.1 and H ¯ g 550 ( visor ) = 5.7 mag, respectively. While the visor sample is dimmer in aggregate, the range corrected brightness distribution ranged from H g 550 = 4.3 mag to 9.4 mag. The two brightest satellites have similar H g 550 to within the uncertainty, but one is visored and the other nonvisored. The dimmest satellite we observed is one without mitigations. The intrinsic brightness dispersion among the full sample is σ g = 0.5 mag.

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Thomas, Shari R., Robert M. Cartledge, Michael R. Graham, James A. Patterson, and Don Poe. "Field Investigations of Laser Eye Protection F-15E Aircraft Lighting Compatibility." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 37, no. 1 (October 1993): 55–59. http://dx.doi.org/10.1177/154193129303700114.

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The need to protect aircrews from ocular laser exposures increases as lasers proliferate in military systems. Many aircraft lighting incompatibilities are associated with the current Air Force daytime laser eye protection (LEP) visor. Weapons Systems Trainer (WST) and ground tests were conducted to determine the compatibility of three prototype LEP visors with F-15E aircraft lighting. In the WST, aircrews rated statements concerning the visibility and color appearance of the instruments with the LEP. For ground tests, F-15E instructors viewed lights inside and outside of the cockpit with the LEP before and after sorties and completed questionnaires about their visibility. The visibility of most of the F-15E instruments was not detrimentally affected by LEP use, but their color appearance was altered, which affected the utility of two head-down displays (HDDs). One LEP visor also affected exterior aircraft lighting visibility. The majority of the aircrews judged the LEP visors to be safe for F-15E flight operations.

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Ballmann, Christopher G., Anna C. Covington, Rachel A. Miller, and Rebecca R. Rogers. "Protective Football Headgear and Peripheral Visuomotor Ability in NCAA Football Athletes: The Role of Facemasks and Visors." Journal of Functional Morphology and Kinesiology 6, no. 2 (April 8, 2021): 34. http://dx.doi.org/10.3390/jfmk6020034.

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The purpose of this investigation was to determine the effects of varying facemask reinforcement and visor tint on peripheral visuomotor abilities in collegiate football players. Division I NCAA football players (n = 14) completed two peripheral visuomotor experiments: (1) Varying facemask reinforcement, (2) Varying visor tinting. In experiment 1, participants were tested under the following conditions: baseline (no helmet; BL), helmet + light (HL), helmet + medium (HM), helmet + heavy (HH), and helmet + extra heavy (HXH) reinforced facemasks. In experiment 2, participants were tested under the following conditions: baseline (no helmet; BL), helmet only (HO), helmet + clear (HCV), helmet + smoke-tinted (HSV), and helmet + mirror-tinted (HMV) visors. For each condition, a 60 s peripheral visuomotor test was completed on a Dynavision D2 visuomotor board. For experiment 1, the BL peripheral reaction time (PRT) was faster than all facemask conditions (p < 0.05). Furthermore, PRT was impaired with the HXH compared to HL (p < 0.001), HM (p < 0.001), and HH (p = 0.001). Both HH and HXH resulted in the potentiation of PRT impairments in the outermost and inferior peripheral visual areas (p < 0.05). In experiment 2, BL PRT was faster than all helmeted conditions (p < 0.05). Additionally, PRT was slower in HSV (p = 0.013) and HMV (p < 0.001) conditions compared to HO. HMV resulted in slower PRT in all peripheral areas (p < 0.05) while PRT was impaired only in outer areas for HSV (p < 0.05). Wearing protective football headgear impairs peripheral visuomotor ability. Lighter reinforced facemasks and clear visors do not appear to exacerbate impairment. However, heavier reinforced facemasks and tinted visors further decrease visuomotor performance in outer and inferior visual areas, indicating a potential need for considerations of on-field player performance and safety.

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4

Kamiya, Naohiro. "Aircrew laser eye protection visors." Optical Engineering 44, no. 8 (August 1, 2005): 084303. http://dx.doi.org/10.1117/1.2032847.

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Buyan, Munkhbayar, Paul A. Brühwiler, Andris Azens, Greger Gustavsson, Richard Karmhag, and Claes G. Granqvist. "Facial warming and tinted helmet visors." International Journal of Industrial Ergonomics 36, no. 1 (January 2006): 11–16. http://dx.doi.org/10.1016/j.ergon.2005.06.005.

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Yang, Han Bo, Xing Jun Hu, and Teng Fei Li. "Numerical Analyses to Investigate the Impact of External Sun Visor on Aerodynamic Drag of Heavy-Duty Commercial Truck." Applied Mechanics and Materials 602-605 (August 2014): 787–90. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.787.

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Aerodynamic drag is one of the most important sources of the driving resistance suffered by an on-road heavy-duty truck. The previous studies have rarely involved the role of the external sun visor. Therefore, numerical method is used for the research of the influence of six kinds of sun visors differenced by shapes or layouts on the aerodynamic drag reduction. It is demonstrated that the sun visor has a great influence on the local flow field where it is fixed, while a relatively small effect on the global flow field. Moreover, compared to the original one, the CDvalues of each case have different degrees of reduction which illustrates that an appropriate shape and layout of a sun visor benefits the air drag reduction, the largest decline is 4.7%.

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Creswell, Kevin A., Darrell M. Toma, Scott D. Brisbin, and John R. Reddon. "Superiority of Clear-Visor Safety Hat to Opaque-Visor Hat: An Evaluation of Upper Visual-Field Obstruction." Perceptual and Motor Skills 79, no. 3_suppl (December 1994): 1535–38. http://dx.doi.org/10.2466/pms.1994.79.3f.1535.

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Three subjects were used to compare superior visual-field threshold for 5 North American industry-standard opaque safety hard hats with a prototype clear translucent-visor safety hard hat and a no-hat baseline condition. Average maximum degrees of superior visual field was equivalent for the clear-visor safety hat and no-hat conditions (52.0° versus 48.3°) but the opaque-visor safety hats resulted in only 15.1°. The opaque safety hats were worse than the clear-visor safety hat and no-hat conditions by, on the average, an order of 3. Analysis indicated that visual-field obstruction is a potential problem for wearers of opaque safety hats. Field research will be required to assess the extent of injuries caused by an impaired superior field of vision when wearing opaque-safety-hat visors. The potential positive effects of the clear-visor safety hat on reduction of accidents also must be determined.

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Cruz Nieto, Dante, Ronald Rodriguez Espinoza, Olga Valderrama Rios, Jorge López Balarezo, Ronald Ramos Pacheco, Elvira Castañeda Chirre, José Yovera Saldarriaga, and Patricia Meyhuey Pala. "Effect of the protection measures established by the peruvian government to prevent the Coronavirus in the Barranca district during the second wave of infections [Efecto de las medidas de protección establecidas por el gobierno peruano para prevenir el Coronavirus en el distrito de Barranca durante la segunda ola de contagios]." Journal of Global Education Sciences 3, no. 1 (February 22, 2021): 1. http://dx.doi.org/10.32829/ges.v3i1.215.

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The objective of the investigation is to establish the effect of the protection measures established by the government to reduce the contagion by Covid -19 in the district of Barranca during the second wave of infections. Data were collected on compliance with protection measures such as distancing, use of masks, visors and disinfection with alcohol in public places such as streets, markets, banks and parks. For this, data collection instruments based on visual inspection were used to verify the appropriate use of protection measures, as well as a survey regarding the use of alcohol as a disinfectant; and the data obtained was processed through basic statistics and correlation with the data reported by the Ministry of Health of positive infections by Covid-19. It was determined that there is a growth relationship between compliance with protection measures and the number of positive infections, with correlation coefficients for distance of 0.7458, use of 0.6710 masks, 0.8784 visors and use of alcohol as a disinfectant of 0.7310. Regarding the analysis of variance, it is obtained that the use of visors influences the number of positive infections, which is why it is concluded that maintaining distance, in addition to the use of masks and disinfectant alcohol are effective measures to control the number of infections per coronavirus.

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9

Clayton, Mike, and Nick Baxter. "Air-Fed Visors Used for Isocyanate Paint Spraying—Potential Exposure When the Visor Is Lifted." Annals of Occupational Hygiene 59, no. 9 (August 24, 2015): 1179–89. http://dx.doi.org/10.1093/annhyg/mev055.

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10

Stevens, Sean T., Jamie Lynn Masco, and Julian Paul Keenan. "Aggression and Visors in the National Hockey League." Southern Medical Journal 101, no. 10 (October 2008): 979–80. http://dx.doi.org/10.1097/smj.0b013e3181818107.

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11

Brühwiler, Paul. "Radiant heat transfer of bicycle helmets and visors." Journal of Sports Sciences 26, no. 10 (July 17, 2008): 1025–31. http://dx.doi.org/10.1080/02640410801930143.

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12

Garcia Macias, J. Antonio, Jorge Alvarez-Lozano, Paul Estrada, and Edgardo Aviles Lopez. "Browsing the Internet of Things with Sentient Visors." Computer 44, no. 5 (May 2011): 46–52. http://dx.doi.org/10.1109/mc.2011.128.

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13

Cruz Nieto, Dante, Ronald Rodriguez Espinoza, William Guzmán Sánchez, Juan Ipanaqué Roña, Ronald Ramos Pacheco, Delicias Natividad Huasupoma, and Patricia Meyhuey Pala. "Influence of compliance with protection measures to prevent contagion by Covid-19 during the first wave in the district of Barranca [Influencia del acatamiento de las medidas de protección para prevenir el contagio por Covid-19 durante la primera ola en el distrito de Barranca]." Journal of Global Education Sciences 3, no. 1 (March 10, 2021): 16. http://dx.doi.org/10.32829/ges.v3i1.220.

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The objective is to determine how compliance with the protection measures to prevent the spread of coronavirus influences the district of Barranca. The markets and banks were evaluated during the months from March to October 2020, taking as a sample 100 randomly selected people. Compliance with protection measures in the markets occurred gradually, being the month of August where the use of masks was observed in 100%, and in October 95% use of alcohol, 65% use of visors and 58% distancing. In banks, the use of masks reached 100% as of June, in September the use of disinfectant alcohol was 100%, 71% in visors and in October 100% distancing was obtained. It was compared with the results issued by the Ministry of Health, reaching a maximum value of 738 positives in August and a maximum of 33 deaths in June. Despite the protection regulations being complied with, the number of infections increased. However, it is necessary to efficiently intensify protection and control measures in order to avoid a second wave of infections.

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14

Lai, Hsin-His, and Hsinfu Huang. "Evaluation of visibility of tinted helmet visors for motorcycle riders." International Journal of Industrial Ergonomics 38, no. 11-12 (November 2008): 953–58. http://dx.doi.org/10.1016/j.ergon.2008.02.013.

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15

Park, Jong-Nam, and Seung-Hee Noh. "Molding Analysis for the Production of Large Sun Visors in Vehicles." Journal of the Korea Academia-Industrial cooperation Society 17, no. 11 (November 30, 2016): 610–15. http://dx.doi.org/10.5762/kais.2016.17.11.610.

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16

Weise, Katherine K., Mark W. Swanson, Sarah J. Galt, Daniel B. Springer, Jason N. Crosson, Dawn K. DeCarlo, Matthew Heath Hale, Joshua Ryne Nicholson, and James B. Robinson. "Objective Vision-related Indications for Clear and Tinted Football Helmet Visors." Optometry and Vision Science 98, no. 7 (July 2021): 833–38. http://dx.doi.org/10.1097/opx.0000000000001730.

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17

Kololuoma, T., J. A. I. Oksanen, P. Raerinne, and J. T. Rantala. "Dye-doped sol-gel coatings for near-infrared laser protection." Journal of Materials Research 16, no. 8 (August 2001): 2186–88. http://dx.doi.org/10.1557/jmr.2001.0298.

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Sol-gel technology was used to fabricate two types of near-infrared absorbing dye-doped polyceram coatings for eye protection purposes against laser radiation. Tolerance of polycarbonate visors against mechanical and chemical stresses may be enhanced by using these coatings. The visible light transmission maxima of high-quality 35 and 25 μm-thick spray-coated polyceram coatings were 70% and 90% for methacrylic and propyl functionalities, respectively. Optical densities at 1064 nm were 4 and 2.

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Parker, Evan, Chandler S. Mitchell, Joshua P. Smith, Evan Carr, Rasul Akbari, Afshin Izadian, and Amir R. Hajrasouliha. "Modeling of external self-excitation and force generation on magnetic nanoparticles inside vitreous cavity." Mathematical Biosciences and Engineering 18, no. 6 (2021): 9381–93. http://dx.doi.org/10.3934/mbe.2021461.

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<abstract> <p>The purpose of this manuscript was to design a better method for recovery from rhegmatogenous retinal detachment (RRD) surgery. We attempted to achieve this by designing a helmet that can manipulate intraocular magnetic nanoparticles (MNPs) and create a magnetic tamponade, eliminating the need for postoperative head positioning. A simulated analysis was developed to predict the pattern of magnetic force applied to the magnetic nanoparticles by external magnetic field. No participants were involved in this study. Instead, magnetic flux and force data for three different helmet designs were collected using virtual simulation tools. A prototype helmet was then constructed and magnetic flux and force data were recorded and compared to virtual data. For both virtual and physical scenarios, magnitude and direction of the resulting forces were compared to determine which design created the controlled direction and strongest forces into the back of the eye. Of the three virtual designs, both designs containing a visor had greater force magnitude than magnet alone. Between both designs with visors, the visor with bends resulted in forces more directed at the back of the eye. The physical prototype helmet shared similar measurements to virtual simulation with minimal percent error (Average = 5.47%, Standard deviation = 0.03). Of the three designs, the visor with bends generated stronger forces directed at the back of the eye, which is most appropriate for creating a tamponade on the retina. We believe that this design has shown promising capability for manipulating intraocular MNPs for the purpose of creating a tamponade for RRD.</p> </abstract>

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Idris, Siti Nursyakirah, and Siti Amira Othman. "The Application of Natural Dye on Tinted Vehicle Films – A Review." Journal of Physics: Conference Series 2169, no. 1 (January 1, 2022): 012005. http://dx.doi.org/10.1088/1742-6596/2169/1/012005.

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Abstract The study present the utilization of natural dye from onion skin on tinted film. Tinted film for the car and helmet visor is produced from Polyethylene Terephthalate (PET) as the main material. However, tinted films that do not meet the Visible Light Transmission (VLT) values authorized for automobiles are being used by some people. Tinted films are also often manufactured using synthetic dyes, which have negative environmental impacts. Thus, the objective of this study was to prepare the tinted film for car and helmet visors that can comply with safety standards (MS1). Tinted film produced must comply with the percentage of VLT allowed which is 30%, 50% and 70%. Synthetic dyes, which are frequently used in the plastic manufacturing sector, will be substituted with natural colours in this study. PET is excellent for manufacturing plastic films because it has a number of benefits, including the ability to act as an amorphouse and semi-crystalline material. Natural dye extracted from onion skin is a good dye because there are Auxochrome groups. By choosing natural dyes over other options, we are helping to protect the environment and reducing human reliance on toxic chemicals.

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20

Micieli, Jonathan A., David Zurakowski, and Iqbal Ike K. Ahmed. "Impact of visors on eye and orbital injuries in the National Hockey League." Canadian Journal of Ophthalmology 49, no. 3 (June 2014): 243–48. http://dx.doi.org/10.1016/j.jcjo.2014.03.008.

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21

Hamilton, J., T. Lewis, L. Farmer, and D. Richards. "Universal visors as a key measure to stop nosocomial transmission of SARS-CoV-2." Journal of Hospital Infection 111 (May 2021): 200–201. http://dx.doi.org/10.1016/j.jhin.2021.02.019.

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22

Allan, D. B., and B. M. Wroblewski. "Contamination of the visors of total body exhaust suits in total hip replacement surgery." Hip International 14, no. 3 (2004): 193–95. http://dx.doi.org/10.5301/hip.2008.2553.

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23

Condino, Sara, Marina Carbone, Roberta Piazza, Mauro Ferrari, and Vincenzo Ferrari. "Perceptual Limits of Optical See-Through Visors for Augmented Reality Guidance of Manual Tasks." IEEE Transactions on Biomedical Engineering 67, no. 2 (February 2020): 411–19. http://dx.doi.org/10.1109/tbme.2019.2914517.

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24

Stevens, S. T., M. Lassonde, L. de Beaumont, and J. P. Keenan. "The effect of visors on head and facial injury in National Hockey League players." Journal of Science and Medicine in Sport 9, no. 3 (June 2006): 238–42. http://dx.doi.org/10.1016/j.jsams.2006.03.025.

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Allan, D. B., and B. M. Wroblewski. "Contamination of the Visors of Total Body Exhaust Suits in Total Hip Replacement Surgery." HIP International 14, no. 3 (July 2004): 193–95. http://dx.doi.org/10.1177/112070000401400308.

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Carbone, Marina, Davide Domeneghetti, Fabrizio Cutolo, Renzo D’Amato, Emanuele Cigna, Paolo Domenico Parchi, Marco Gesi, Luca Morelli, Mauro Ferrari, and Vincenzo Ferrari. "Can Liquid Lenses Increase Depth of Field in Head Mounted Video See-Through Devices?" Journal of Imaging 7, no. 8 (August 5, 2021): 138. http://dx.doi.org/10.3390/jimaging7080138.

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Wearable Video See-Through (VST) devices for Augmented Reality (AR) and for obtaining a Magnified View are taking hold in the medical and surgical fields. However, these devices are not yet usable in daily clinical practice, due to focusing problems and a limited depth of field. This study investigates the use of liquid-lens optics to create an autofocus system for wearable VST visors. The autofocus system is based on a Time of Flight (TOF) distance sensor and an active autofocus control system. The integrated autofocus system in the wearable VST viewers showed good potential in terms of providing rapid focus at various distances and a magnified view.

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Caillaud, B., L. Dupont, P. Gautier, J. L. de Bougrenet de la Tocnaye, P. Rudquist, D. Engström, P. Jägemalm, and S. T. Lagerwall. "A New Application of Ferroelectric Liquid Crystals: Fast Electrooptic Helmet Visors for Pulsed Welding Applications." Ferroelectrics 364, no. 1 (May 21, 2008): 66–71. http://dx.doi.org/10.1080/00150190802046901.

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Kilpeläinen, Simo, Sami Lestinen, and Risto Kosonen. "Assessment and Mitigation of Infection Risk Caused by a Coughing Person." E3S Web of Conferences 356 (2022): 05002. http://dx.doi.org/10.1051/e3sconf/202235605002.

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The recent COVID-19 pandemic has increased public awareness of the importance of clean indoor air. Many studies have been conducted on how virus-like particles propagate in indoor environments, and how their spreading could be constrained. In this study, we assessed how the infection risk caused by a coughing person behaves in a meeting room. We analysed how well different protective measures (face masks, visors, air purifiers, partitions) can reduce the risk. The room had a floor area of 21 m2 and was furnished with a conference table with seating for six people. The room was equipped with a mixing ventilation system providing fresh air at a rate of 36 l/s, or 1.7 l/s·m2. The supply air temperature was 17°C and the room air temperature 23°C. The coughing person was realized by a cough/sneeze machine Ch3st developed by CH Technologies, USA. Paraffin oil was aerosolized with a BLAM nebulizer from the same company and released in bursts by the cough machine to emulate real coughs. A breathing thermal manikin (PT Teknik, Denmark) was used as the exposed person. Two TSI 3330 OPS optical particle sizers were used to assess the particle concentrations. There were 14 test cases in total. A case with no protective equipment was used as the reference. During each measurement, 21 coughs were released into the test room and the particle concentrations were monitored at one-second intervals from the exposed person’s breathing zone and from the infector’s workstation. Each cough reaching the exposed person produced a sharp peak in the particle concentration and the number of these peaks was used to assess the effectiveness of each protection measure. The distance between the opposite workstations was 120 cm. The results indicate that masks and visors on the infected person, and partitions, are effective protective measures against cough-based pathogens. Air purifiers and personal protection on the exposed person had little effect.

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Rogers, Rebecca, Anna Covington, Rachel Miller, and Christopher G. Ballmann. "Effects Of Clear, Tinted, And Mirror Tinted Football Helmet Visors On Reaction Time And Target-detection." Medicine & Science in Sports & Exercise 53, no. 8S (August 2021): 46. http://dx.doi.org/10.1249/01.mss.0000759616.13845.cd.

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Meesters, Ybe, Domien G. M. Beersma, Antoinette L. Bouhuys, and Rutger H. van den Hoofdakker. "Prophylactic treatment of seasonal affective disorder (SAD) by using light visors: bright white or infrared light?" Biological Psychiatry 46, no. 2 (July 1999): 239–46. http://dx.doi.org/10.1016/s0006-3223(98)00252-2.

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Nylander, David, John S. Leeds, John Perry, Manjusha Narayanan, Chris R. Dipper, and Kofi Oppong. "ID: 3526520 BACTERIAL CONTAMINATION OF FACIAL VISORS DURING UPPER AND LOWER GASTROINTESTINAL (GI) ENDOSCOPY - A PILOT STUDY." Gastrointestinal Endoscopy 93, no. 6 (June 2021): AB48. http://dx.doi.org/10.1016/j.gie.2021.03.156.

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32

Samara, Eleni Theano, Davide Cester, Miha Furlan, Thomas Pfammatter, Thomas Frauenfelder, and Anja Stüssi. "Efficiency evaluation of leaded glasses and visors for eye lens dose reduction during fluoroscopy guided interventional procedures." Physica Medica 100 (August 2022): 129–34. http://dx.doi.org/10.1016/j.ejmp.2022.06.021.

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Shaptala, V. V., K. I. Logachev, O. A. Averkova, and D. N. Krutikova. "Modeling of convective vapor-air flows near onboard suction from open-surface reservoirs." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 12 (January 23, 2020): 56–61. http://dx.doi.org/10.17073/1683-4518-2019-12-56-61.

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The results of modeling the processes of capturing harmful emissions from galvanic baths or other tanks with an open surface are presented. An approach based on a numerical determination of the concentration of contaminated substances in the working areas of the room is proposed to evaluate the effectiveness of airborne suction. The fields of air velocity and concentration of harmful vapors in the working area are calculated. The dependence of the flow velocity around the surface of the technological solution on the distance between the surface of the solution and the lower edge of the suction is determined. It is shown that increasing the efficiency of airborne suction can be achieved by mechanical shielding --installation of impervious thin visors on the sides of the bath. The height of the mechanical screen should be about 0.5 of the width of the tank. Ill. 7. Ref. 23.

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STRMBERG, TOMAS, JRGEN EKLUND, and PER M. GUSTAFSSON. "A method for measuring the C02dead space volume in facial visors and respiratory protective devices in human subjects." Ergonomics 39, no. 9 (September 1996): 1087–106. http://dx.doi.org/10.1080/00140139608964531.

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Rinaldi, Antonio M., Cristiano Russo, and Cristian Tommasino. "An Augmented Reality CBIR System Based on Multimedia Knowledge Graph and Deep Learning Techniques in Cultural Heritage." Computers 11, no. 12 (November 30, 2022): 172. http://dx.doi.org/10.3390/computers11120172.

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In the last few years, the spreading of new technologies, such as augmented reality (AR), has been changing our way of life. Notably, AR technologies have different applications in the cultural heritage realm, improving available information for a user while visiting museums, art exhibits, or generally a city. Moreover, the spread of new and more powerful mobile devices jointly with virtual reality (VR) visors contributes to the spread of AR in cultural heritage. This work presents an augmented reality mobile system based on content-based image analysis techniques and linked open data to improve user knowledge about cultural heritage. In particular, we explore the uses of traditional feature extraction methods and a new way to extract them employing deep learning techniques. Furthermore, we conduct a rigorous experimental analysis to recognize the best method to extract accurate multimedia features for cultural heritage analysis. Eventually, experiments show that our approach achieves good results with respect to different standard measures.

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میخائیل, ماری. "MANAGEMENT SKILLS OF AGRICULTURAL SUPER VISORS EXTENSION'S IN KAFR EL- SHEIKH GOVERNORATE المهارات الإداریة للمشرفین الإرشادیین الزراعیین بمحافظة کفرالشیـخ." Journal of Agricultural Economics and Social Sciences 5, no. 12 (December 1, 2014): 1955–73. http://dx.doi.org/10.21608/jaess.2014.42751.

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Schauer, Todd, P. Noble, H. Martin, P. S. Hatfield, Ken Davies, G. Roddan, and G. Stensgaard. "RO/RO Passenger Ferry Safety: A Perspective from the Canadian West Coast." Marine Technology and SNAME News 33, no. 02 (April 1, 1996): 81–91. http://dx.doi.org/10.5957/mt1.1996.33.2.81.

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This paper discusses actions which the British Columbia Ferry Corporation has undertaken subsequent to the catastrophic 1994 Estonia capsize accident in the Baltic Sea that resulted in the loss of 912 lives. The corporation sets as its highest goal the provision of a "safe, efficient and effective ferry system," and therefore the actions described form part of a continuum of safety improvement which is central to the BCFC operating philosophy. Recommendations with respect to both rough water, northern route vessels and to the southern route, more sheltered water fleet are outlined. In addition, the improvement of safety on the northern routes vessels by the fitting of improved supporting and closing devices on the bow visors, by improving the bow ramp securing arrangements and by installation of inner weathertight doors is described in detail. Some recent model testing undertaken to investigate the potential for "bow scooping," and which has provided valuable input to the International Maritime Organization's Panel of Experts in determining the limits of application of proposed bow flooding criteria, is reviewed.

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Capoor, Malini R., and Annapurna Parida. "Biomedical Waste and Solid Waste Management in the Time of COVID-19: A Comprehensive Review of the National and International Scenario and Guidelines." Journal of Laboratory Physicians 13, no. 02 (June 2021): 175–82. http://dx.doi.org/10.1055/s-0041-1729132.

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AbstractBiomedical waste generated during the diagnosis, isolation, and treatment of coronavirus disease 2019 (COVID-19) patients can also be the source of new infections; hence, it needs special consideration. Previous guidelines for the management of biomedical waste need to be revisited as the majority of COVID-19 patients remain asymptomatic and reside in community. Personal protective equipment (PPE) like masks, hazmat suits, gloves, and visors are now being used by the public also. Thus, the general household waste and disposables now make an exponential increase in the waste that can be considered an environmental hazard. In this article, the authors have tried to present the problems arising from COVID-19 waste and the recommendations put forth by competent authorities both nationally and internationally on COVID-19 waste management. Furthermore, in all the guidelines, it is crucial that the COVID-19 waste management follows environmentally sound principles and practices of biomedical waste management, with safe work and infection-control practices. Segregation of COVID-19 waste at source, awareness, and precautions at all steps of the waste-cycle are the only way ahead in this crisis.

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Miranda, Flávio Dutra, Marcus Vinicius Teixeira de Almeida, and Geraldo Magela Salomé. "Validation of Algorithms for Donning and Doffing Personal Protective Equipment during the COVID-19 Pandemic." Journal of Coloproctology 41, no. 04 (December 2021): 367–74. http://dx.doi.org/10.1055/s-0041-1739167.

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Abstract Introduction The prolonged or incorrect use of facial masks, respirators and glasses or visors results in friction, pressure and shear forces that constantly act on the facial skin, leading to lesions and dermatitis. Objective To develop and validate algorithms to guide health professionals in the correct use of personal protective equipment (PPE) and indicate preventive measures against skin injuries caused by inappropriate use during the COVID-19 pandemic. Methods For the develoment of the algorithms, an integrative literature review was performed using the following databases: PubMed, SciELO, and LILACS. The algorithms were evaluated by 59 health professionals (nurses, doctors, and physiotherapists), using the Delphi technique. A content validity index (CVI) was used for the statistical analysis. Results The experts classified the items of the algorithms from fully inadequate to fully adequate in the first round of consultations, and from partially adequate to fully adequate in the second round. The overall CVI values were of 0.83 and 1.0 in the first and second rounds respectively. Conclusion The algorithms validated by the expert panel can be used by health professionals when donning and doffing PPE, and to prevent the facial-skin lesions caused by their use.

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Meier, Cecile, Jose Saorín, Jorge de la Torre-Cantero, and Manuel Díaz-Alemán. "Alternative Divulgation of the Local Sculptural Heritage: Construction of Paper Toys and Use of the Minecraft Video Game." Sustainability 10, no. 11 (November 18, 2018): 4262. http://dx.doi.org/10.3390/su10114262.

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At present it is easy to digitalize sculptural heritage in 3D. Three-dimensional models allow for visualization of the work from all angles. The result can be seen in three-dimensional visors, in virtual reality, or by means of 3D-printed replicas. However, the recipient continues to be, as is also the case in books and videos, a passive spectator of the cultural patrimony. In order to promote participation and to increase interest in local heritage, alternative methods for promotion of the digital patrimony have been developed. In this article, two means of publicizing local (less-known) heritage in an active manner have been described. On the one hand, the transformation of 3D models into cut-outs (paper toys) where it is necessary to make the sculptures by hand, and on the other hand, the incorporation of the models into the video game Minecraft, an immersed 3D world which permits visiting or generating content. To validate these alternatives, two examples based on the sculptures of Santa Cruz de Tenerife (Spain) have been created, and they have been used in pilot studies in schools in order to obtain a first appraisal of user satisfaction.

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Porcedda, Maria Elisabetta. "Teaching History during Covid-19." Pulso. Revista de educación, no. 44 (November 28, 2021): 129–43. http://dx.doi.org/10.58265/pulso.4655.

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It is here reported the experience of a first classroom of an Italian Liceo during the semi-lockdown at school (students in weekly rotation), then full. Creating a participatory environment was the aim, to give all students the opportunity to acquire concrete knowledge and to develop the 21st century skills, starting from the Learning ones. So, cooperative peers in flipped classroom, were invited to: read and see teacher’s selected sources (also for 3D visors); write an online document (Word), answering to questions of their peer; create a digital storytelling of the topic to orally expose online, collaborating through social media (WhatsApp) and collaborative online tools; finally, answer to a quiz (Quizziz). The obtained results concern: the engagement of the classroom, which fosters all students’ essential understanding and knowledge; inclusion of weaknesses, through their active role in cooperation; inclusion of mobile-phones as democratic tool; ubiquity of learning, which reduces the distance between online and in-presence schooling; above all, fostering the achievement of the 21st century skills, particularly learning-to-learn. For all these reasons, what lockdown teaches will remain as a valid didactical lesson.

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Dou, Dandan. "Sensor Vegetable Greenhouse and Agricultural Product Supply Chain Management Based on Improved Neural Network." Mobile Information Systems 2022 (August 18, 2022): 1–9. http://dx.doi.org/10.1155/2022/4139784.

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In recent years, people have begun to collect environmental data in vegetable greenhouses. Therefore, this article studies the current internal control technology of vegetable greenhouses, and improves the sensor application in vegetable greenhouses, in a targeted manner by combining with the improved neural network algorithm. The model has more accurate prediction accuracy than traditional BP. By using the Android client and ZigBee artificial intelligence control technology it creates the most suitable living conditions for the vegetables, fruits, and other crops in the vegetable greenhouse by controlling the various valves, sun visors, and light supplementary switches inside the vegetable greenhouse. The simulation results show that the model proposed in this article has higher convergence accuracy. In addition, this article applies the improved neural network to the management of the agricultural product supply chain, starting from the agricultural product supply chain and agricultural product supply chain management. Based on this, the analytic hierarchy process is used to explore the influencing factors of agricultural product supply chain management, and the analysis shows that consumers are targeting different consumer demand raised by the agricultural product supply chain. The improved neural network provides new ideas for the research of sensor vegetable greenhouses and agricultural product supply chain management.

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Cox, Trevor J., George Dodgson, Lara Harris, Emanuele Perugia, Michael A. Stone, and Michael Walsh. "Improving the measurement and acoustic performance of transparent face masks and shields." Journal of the Acoustical Society of America 151, no. 5 (May 2022): 2931–44. http://dx.doi.org/10.1121/10.0010384.

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Opaque face masks harm communication by preventing speech-reading (lip-reading) and attenuating high-frequency sound. Although transparent masks and shields (visors) with clear plastic inserts allow speech-reading, they usually create more sound attenuation than opaque masks. Consequently, an iterative process was undertaken to create a better design, and the instructions to make it are published. The experiments showed that lowering the mass of the plastic inserts decreases the high-frequency sound attenuation. A shield with a clear thermoplastic polyurethane (TPU) panel had an insertion loss of (2.0 ± 1.1) dB for 1.25–8 kHz, which improves on previous designs that had attenuations of 11.9 dB and above. A cloth mask with a TPU insert was designed and had an insertion loss of (4.6 ± 2.3) dB for 2–8 kHz, which is better than the 9–22 dB reported previously in the literature. The speech intelligibility index was also evaluated. Investigations to improve measurement protocols that use either mannikins or human talkers were undertaken. Manufacturing variability and inconsistency of human speaking were greater sources of experimental error than fitting differences. It was shown that measurements from a mannikin could match those from humans if insertion losses from four human talkers were averaged.

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Gil Muñoz, Victor, Luisa M. Muneta, Ruth Carrasco-Gallego, Juan de Juanes Marquez, and David Hidalgo-Carvajal. "Evaluation of the Circularity of Recycled PLA Filaments for 3D Printers." Applied Sciences 10, no. 24 (December 16, 2020): 8967. http://dx.doi.org/10.3390/app10248967.

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The circular economy model offers great opportunities to companies, as it not only allows them to capture additional value from their products and materials, but also reduce the fluctuations of price-related risks and material supply. These risks are present in all kind of businesses not based on the circular economy. The circular economy also enables economic growth without the need for more resources. This is because each unit has a higher value as a result of recycling and reuse of products and materials after use. Following this circular economics framework, the Polytechnic University of Madrid (Universidad Politécnica de Madrid, UPM) has adopted strategies aimed at improving the circularity of products. In particular, this article provides the result of obtaining recycled PLA filament from waste originating from university 3D FFF (fused filament fabrication) printers and waste generated by “Coronamakers” in the production of visors and parts for PPEs (Personal Protective Equipment) during the lockdown period of COVID-19 in Spain. This filament is used in the production of 3D printed parts that university students use in their classes, so the circular loop is closed. The obtained score of Material Circularity Indicator (MCI) of this material has been calculated, indicating its high level of circularity.

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Mróz, Przemek, Angel Otarola, Thomas A. Prince, Richard Dekany, Dmitry A. Duev, Matthew J. Graham, Steven L. Groom, Frank J. Masci, and Michael S. Medford. "Impact of the SpaceX Starlink Satellites on the Zwicky Transient Facility Survey Observations." Astrophysical Journal Letters 924, no. 2 (January 1, 2022): L30. http://dx.doi.org/10.3847/2041-8213/ac470a.

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Abstract There is a growing concern about an impact of low-Earth-orbit (LEO) satellite constellations on ground-based astronomical observations, in particular, on wide-field surveys in the optical and infrared. The Zwicky Transient Facility (ZTF), thanks to the large field of view of its camera, provides an ideal setup to study the effects of LEO megaconstellations—such as SpaceX’s Starlink—on astronomical surveys. Here, we analyze the archival ZTF observations collected between 2019 November and 2021 September and find 5301 satellite streaks that can be attributed to Starlink satellites. We find that the number of affected images is increasing with time as SpaceX deploys more satellites. Twilight observations are particularly affected—a fraction of streaked images taken during twilight has increased from less than 0.5% in late 2019 to 18% in 2021 August. We estimate that once the size of the Starlink constellation reaches 10,000, essentially all ZTF images taken during twilight may be affected. However, despite the increase in satellite streaks observed during the analyzed period, the current science operations of ZTF are not yet strongly affected. We also find that redesigning Starlink satellites (by installing visors intended to block sunlight from reaching the satellite antennas to prevent reflection) reduces their brightness by a factor of 4.6 ± 0.1 with respect to the original design in g, r, and i bands.

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Nemani, Srinivasa Kartik, Dayong Chen, Marwan H. Mohamed, and Hossein Sojoudi. "Stretchable and Hydrophobic Electrochromic Devices Using Wrinkled Graphene and PEDOT:PSS." Journal of Nanomaterials 2018 (2018): 1–10. http://dx.doi.org/10.1155/2018/3230293.

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We present an electrochromic device (ECD) fabricated using PEDOT:PSS and graphene as active conductive electrode films and a flexible compliant polyurethane substrate with 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMI-TSFI) additive, as ionic medium. This device with a docile, elastic intermediate substrate along with a transparency controlled PEDOT:PSS film provides a wide color contrast and fast switching rate. We harness wrinkling instability of graphene to achieve a hydrophobic nature without compromising transparency of the ECD. This mechanical self-assembly approach helps in controlling the wavelength of wrinkles generated by inducing measured prestrain conditions and regulating the modulus contrast by selection of underlying materials used, hereby controlling the extent of transparency. The reduction and oxidation switching times for the device were analyzed to be 5.76 s and 5.34 s for a 90% transmittance change at an operating DC voltage of 15 ± 0.1 V. Strain dependent studies show that the performance was robust with the device retaining switching contrasts even at 15% uniaxial strain conditions. Our device also exhibits superior antiwetting properties with an average water contact angle of 110° ± 2° at an induced radial prestrain of 30% in the graphene film. A wide range color contrast, flexibility, and antiwetting nature of the device envision its uses in smart windows, visors, and other wearable equipment where these functionalities are of outmost importance for developing new generation of smart interactive devices.

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Dvoretsky, A. T., V. V. Sidorova, and A. E. Maksimenko. "SOLAR GEOMETRY IN SMALL ARCHITECTURAL FORMS OF PARKS." LANDSCAPE ARCHITECTURE IN THE GLOBALIZATION ERA, no. 3 (2022): 74–88. http://dx.doi.org/10.37770/2712-7656-2022-3-74-88.

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Small architectural forms in parks are considered, which include awnings, gazebos, pergolas, and which not only allow visitors to relax in the shade, contemplating the beauty of nature, but also decorate the park. Examples of ways to protect people outdoors from the sun and heat in different countries of Southern Europe and the Middle East are given: awnings, canopies, visors and special planning of residential buildings that provide ventilation. Often the main function of awnings, pergolas, canopies is to create a shadow over recreation areas. An analysis of the shape and position of such objects, taking into account solar geometry, suggests that at any position of the sun there will be no shadow in the recreation area. The proposed method of shaping the park's solar protection objects provides protection against overheating when the average daily outdoor temperature is ≥ 21°C. The shape and location of the sunshield is designed to provide shade in the desired area for a given period of the year. To calculate the duration of insolation and design solar protection devices, a solar map is used, which is a universal tool. An example of the construction of a canopy consisting of lamellas, the positions of which provide a continuous shadow for the period of overheating from March 22 to September 22, corresponding to the territory of Crimea, is given.

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Tang, Rongjiang, Hongbin He, Zengjun Lu, Shenfang Li, Enyong Xu, Fei Xiao, and Avelino Núñez-Delgado. "Control of Sunroof Buffeting Noise by Optimizing the Flow Field Characteristics of a Commercial Vehicle." Processes 9, no. 6 (June 16, 2021): 1052. http://dx.doi.org/10.3390/pr9061052.

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When a commercial vehicle is driving with the sunroof open, it is easy for the problem of sunroof buffeting noise to occur. This paper establishes the basis for the design of a commercial vehicle model that solves the problem of sunroof buffeting noise, which is based on computational fluid dynamics (CFD) numerical simulation technology. The large eddy simulation (LES) method was used to analyze the characteristics of the buffeting noise with different speed conditions while the sunroof was open. The simulation results showed that the small vortex generated in the cab forehead merges into a large vortex during the backward movement, and the turbulent vortex causes a resonance response in the cab cavity as the turbulent vortex moves above the sunroof and falls into the cab. Improving the flow field characteristics above the cab can reduce the sunroof buffeting noise. Focusing on the buffeting noise of commercial vehicles, it is proposed that the existing accessories, including sun visors and roof domes, are optimized to deal with the problem of sunroof buffeting noise. The sound pressure level of the sunroof buffeting noise was reduced by 6.7 dB after optimization. At the same time, the local pressure drag of the commercial vehicle was reduced, and the wind resistance coefficient was reduced by 1.55% compared to the original commercial vehicle. These results can be considered as relevant, with high potential applicability, within this field of research.

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Tam, Edwin M., Raymond W. Lam, and Anthony J. Levitt. "Treatment of Seasonal Affective Disorder: A Review." Canadian Journal of Psychiatry 40, no. 8 (October 1995): 457–66. http://dx.doi.org/10.1177/070674379504000806.

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Objective To review the status of current treatment of seasonal affective disorder (SAD). Method Treatment studies of SAD published between January 1989 and March 1995 were identified using a computerized MEDLINE literature search. Additional citations were obtained from the reference sections of these articles. Studies included in this review were selected using operational methodologic criteria. Results Many studies support the efficacy of bright light therapy using a fluorescent light box. The best studied protocol is >2500 lux white light for 2 hours per day, but newer protocols using 10,000 lux for 30 minutes have comparable response rates. Studies of light visors and other head-mounted devices also report similar response rates, but have not yet shown superiority over putative control conditions. There are fewer medication studies in SAD, but controlled studies suggest that fluoxetine, d-fenfluramine and propranolol are effective. Other treatments such as dawn simulation require further study. No studies of psychological treatments for SAD were found. Many studies had methodologic limitations, including brief treatment periods, small sample sizes, and lack of replication, that limit the generalizability of findings. Conclusion There are several well-studied, effective treatments for SAD, including light therapy and medications. However, further research must be done to demonstrate sustained treatment response over time, to clarify the intensity-response relationship of light therapy, to clarify the role of light therapy and medications, and to assess combination treatments.

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Korotkova, Daria A. "Searching for an Ally. The Soviet Diplomats in Latvia and Their Contacts with Kastus Ezavitau 1925–1926." Slavic World in the Third Millennium 15, no. 1-2 (2020): 47–58. http://dx.doi.org/10.31168/2412-6446.2020.15.1-2.04.

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This article is dedicated to the research of unknown fragments of national Belarusian emigrant groups’ history. Soviet diplomatic plans to establish ties with the local Belarusian population and to expand Communist propaganda in Latvia required contact with the leaders of the Belarusian movement, including Ezavitau. The main subject is the activity of Kastus Ezavitau in the middle of the 1920s. There was no possibility for Belarusian activists in the region of Latgale, where most Latvian Belarusians lived, to avoid collaboration with the Soviet permanent mission because of a lack of money and the discrimination policy of Latvian authorities. Local Belarusian activists had to ﬁ ght for inﬂ uence over the Latgale peasants, who often could not yet decide on their national identity, with the much more active and inﬂ uential Polish and Russian diasporas. The Soviet mission provided ﬁ nancial support to the press, and for school education in Belarusian, but forced them to carry out their demands in return. Analysis of a number of archival documents shows that, contrary to the widespread idea of his pro-Soviet mood, this collaboration was involuntary and undesirable for Ezavitau during this period, as we may see in the documents. He tried to provide more independent activity, such as the creation of the Belarusian party, but was permanently stopped by his super- visors in the Soviet mission. Soviet diplomats were not satisﬁ ed by collaboration with Ezavitau either but had no other candidate with whom to establish a permanent contact.

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Journal articles on the topic 'VISORS'

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