Determination of the Loading of a Flat Rack Container during Operating Modes

This research deals with determination of the loading of an open container during operating modes. The special feature of this container is its convex walls. This engineering solution increases the useful capacity of a container by 8% in comparison to that of the prototype. The elastic elements in the bearing structure of a container were introduced to decrease the dynamic loads. The dynamic loads in the vertical plane were dumped by means of the dry friction forces between the components of the cross bearers of the container’s base. The dynamic loads in the longitudinal plane were dumped by means of the dry friction forces between the horizontal parts of fittings and fixed lashing components. This study presents the modelling of the dynamic loading of a container in a vertical plane. The dynamic loads of a container in the longitudinal plane were determined with a mathematical model. The authors determined the basic strength characteristics of the bearing structure of a container; and found that the maximum stresses to a container were about 200 MPa, concentrated near the front fittings. The maximum displacements were recorded in the cross bearers of the base and amounted to about 4 mm.

Hydrogen Storage in Cryogenic, Cybernetic, and Catalytic Vessels for Transport Vehicles

Most of the hydrogen storage vessels meant for vehicles to run the electric motor via a fuel cell during transport are designed for drives of only a few tenths of kilometers per day. The present report, however, describes a vessel model that is conceived to hold the hydrogen energy only for short periods during transport, such as a few hours. This would include transport via a light-duty vehicle, a taxi, or a bus, which would load liquid hydrogen at a station every morning for the day. This is a simple model based on the novel concept of Double Open Vessel (DOV), in which the liquid H2 is loaded inside an open container inserted inside another open container. The walls of this DOV are constituted of simplified linings that allow the entry of thermal heat nearly a hundred times greater than that allowed by the cryo-compressed vessels with higher insulation. After loading, the liquid evaporates, while the gas flows around its initial container into which it was loaded, passes through a few porous plugs, and is gradually released towards the Fuel Cell (or toward an ignition motor). Such a counter-flow of the gas creates a retroaction effect that insulates the inner container, thereby delaying the increases in temperature and pressure. The successive porous plugs installed in the space between the two containers form a system of barrages that regulate the gas flow through successive expansions of decreasing pressures. In addition, these catalytic plugs convert a portion of the loaded hydrogen into its ortho variety, acting as a heat pump, while temporarily storing the other portion. Collectively, these effects maintain the internal pressures below 150 bar. The proposed design for the DOV models is convenient to manufacture and has a lighter weight, and consequently, a low cost.

Aerosol and Droplet Risk of Common Otolaryngology Clinic Procedures

Objectives: Define aerosol and droplet risks associated with routine otolaryngology clinic procedures during the COVID-19 era. Methods: Clinical procedures were simulated in cadaveric heads whose oral and nasal cavities were coated with fluorescent tracer (vitamin B2) and breathing was manually simulated through retrograde intubation. A cascade impactor placed adjacent to the nares collected generated particles with aerodynamic diameters ≤14.1 µm. The 3D printed models and syringes were used to simulate middle and external ear suctioning as well as open suctioning, respectively. Provider’s personal protective equipment (PPE) and procedural field contamination were also recorded for all trials using vitamin B2 fluorescent tracer. Results: The positive controls of nebulized vitamin B2 produced aerosol particles ≤3.30 µm and endonasal drilling of a 3D model generated particles ≤14.1 µm. As compared with positive controls, aerosols and small droplets with aerodynamic diameter ≤14.1 µm were not detected during rigid nasal endoscopy, flexible fiberoptic laryngoscopy, and rigid nasal suction of cadavers with simulated breathing. There was minimal to no field contamination in all 3 scenarios. Middle and external ear suctioning and open container suctioning did not result in any detectable droplet contamination. The clinic suction unit contained all fluorescent material without surrounding environmental contamination. Conclusion: While patients’ coughing and sneezing may create a baseline risk for providers, this study demonstrates that nasal endoscopy, flexible laryngoscopy, and suctioning inherently do not pose an additional risk in terms of aerosol and small droplet generation. An overarching generalization cannot be made about endoscopy or suctioning being an aerosol generating procedure. Level of Evidence: 3

Magnitude, risk factors and antimicrobial susceptibility pattern of Shigella and Salmonella, among children with diarrhea in Southern Ethiopia: A Cross-sectional Study

Objective: This study was aimed at identifying Shigella and Salmonella infection, their antibiotic susceptibility pattern and associated risk factors among children with diarrhea who attended Alamura Health Center. Method: A facility-based cross-sectional study was conducted on 263 children aged below 14 years with diarrhea. A structured questionnaire was used to collect socio-demographic and clinical data after obtaining the necessary consent from their parents or caretakers. The culture and sensitivity tests were performed using the standard operating procedure of the microbiology laboratory. Results: Accordingly, 20/263 (7.6%), 95% confidence interval: 4.4%–11.4% Shigella and 1/263 (0.38%), 95% confidence interval: 0.0%–1.1% Salmonella were isolated. Shigella dysenteriae was dominant 11 (4.2%), followed by Shigella spp. 9 (3.42%) and Salmonella typ 1 (0.38%). The isolates showed 71.4% overall resistance to ampicillin and 61.9% for augmentin and tetracycline, whereas 95.2% of the isolates were sensitive to ciprofloxacin, 85.9% to ceftriaxone and ceftazidime, 81% to gentamycin, 76.2% to chloramphenicol, 66.7% to cefuroxime and 52.4% to cotrimoxazole. The habit of washing hands after toilet use for a while (adjusted odds ratio: 235.1, 95% confidence interval: 20.9–2643.3, p < 0.000) and storing cooked food in an open container for later use (adjusted odds ratio: 36.44, 95% confidence interval: 5.82–228.06, p < 0.000) showed a statistically significant association. Conclusion: High level of Shigella and single Salmonella was isolated. Ampicillin, augmentin and tetracycline were resistant and ciprofloxacin, ceftriaxone, ceftazidime, gentamycin, chloramphenicol, cefuroxime and cotrimoxazole were relatively sensitive. Hand-washing after defecation for some time and storing of foods for later use in an open container were statistically associated. Therefore, to alleviate this infection, the concerned body should focus on imparting health education for hand-wash after defecation and storing food in a closed container for later use is mandatory.

The burden of Shigella and Salmonella, Antibiotics Susceptibility Pattern and Associated Risk Factors among Diarrheic Children visited Alamura Health Center Southern Ethiopia: a cross-sectional study

Background: Salmonella and Shigella is a major health problem worldwide, in developing countries like Ethiopia, it is responsible for high morbidity and mortality of children. This study aimed to determine the prevalence of Salmonella and Shigella infection, their antibiotic susceptibility pattern and associated risk factor among the diarrheic paediatrics patients that visited Alamura Health Center in southern Ethiopia. Method: A facility-based cross-sectional study was conducted at Alamura Health Center from April 2018 – July 2019. The study was performed on paediatrics below the age of 14 years in which consecutive children with diarrhoea were included for the study. A structured questionnaire was used to collect socio-demographic and clinical data after assent and consent obtained from parents or caretaker. The stool sample cultured as per the standard operating procedure (SOP) of the microbiology laboratory. Antibiogram was performed by Kirby-Bauer disc diffusion method and was interpreted based on the Clinical and laboratory standard institute guideline (CLSI) version 2018. Results: Out of 263 children enrolled in the study, 50.5 % were females. The overall, 21/263 (8 %) 95% CI, (4.6 - 11.4%) Shigella and Salmonella was isolated. Shigella dysenteriae was dominantly isolated 11 (4.2%) followed by 9(3.42%) Shigella spp, and 1(0.38%) Salmonella typhi. Highly resistance to ampicillin (71.4%), augmentin and tetracycline (61.9%) each, whereas highly sensitive to ciprofloxacin (95.2%), ceftriaxone & ceftazidime (85.9%) each, gentamycin (81%), chloramphenicol (76.2%), cefuroxime (66.7%) and cotrimoxazole (52.4%) identified. Those with habit of washing the hands of children after toilet sometimes (AOR = 235.1, 95% CI, 20.9 - 2643.3, P = .000) and store cooked food in open container for later use (AOR = 36.44, 95% CI, 5.82 - 228.06, P = .000) showed statistically significant association. Conclusion: High level of Shigella spp and one Salmonella was isolated from diarrheic children at Alamura Health Center. Shigella dysenteriae was the most dominantly isolated. Ampicillin, augmentin and tetracycline are with high resistance and ciprofloxacin, ceftriaxone, ceftazidime, gentamycin, chloramphenicol, cefuroxime and cotrimoxazole relatively sensitive. Those practised hands wash for their child after defecation for sometimes was 235.1-fold at risk of infection. Similarly, those store foods for later use in an open container was 36.44 times at risk of infection. Therefore, to alleviate this infection the concerned body should focus on giving health education for hand wash after defecation and storing food in a closed container later use is mandatory.

Shigella and Salmonella, Antibiotics Susceptibility Pattern and Associated Risk Factors among Diarrheic Children in Southern Ethiopia: a cross sectional study

Background: Salmonella and Shigella is a major health problem worldwide, in developing countries like Ethiopia, it is responsible for high morbidity and mortality of children. This study aimed to determine the prevalence of Salmonella and Shigella infection, their antibiotic susceptibility pattern and associated risk factor among the diarrheic pediatrics patients that visited Alamura Health Center in southern Ethiopia. Method: A facility based cross-sectional study was conducted at Alamura Health Center from April 2018 – July 2019. The study was performed on pediatrics below the age of 14 years in which consecutive children with diarrhea were included for the study. A structured questionnaire was used to collect socio-demographic and clinical data after assent and consent obtained from parents or care taker. The stool sample cultured as per the standard operating procedure (SOP) of the microbiology laboratory. Antibiogram was performed by Kirby-Bauer disc diffusion method and was interpreted based on the Clinical and laboratory standard institute guidline (CLSI) version 2018. Results: Out of 263 children enrolled in the study, 50.5 % were females. The overall, 21/263 (8 %) 95% CI, (4.6 - 11.4%) Shigella and Salmonella was isolated. Shigella dysenteriae was dominantly isolated 11 (4.2%) followed by 9(3.42%) Shigella spp, and 1(0.38%) Salmonella typhi. Those with habit of washing the hands of children after toilet sometimes (AOR = 235.1, 95% CI, 20.9 - 2643.3, P = .000) and store cooked food in open container for later use (AOR = 36.44, 95% CI, 5.82 - 228.06, P = .000) showed statistically significant association. Conclusion: High level of Shigella spp and one Salmonella was isolated from diarrheic children at Alamura Health Center. Shigella dysentery was the most dominantly isolated. Those practised hands wash for their child after defecation for sometimes was 235.1-fold at risk of infection. Similarly, those store foods for later use in an open container was 36.44 times at risk of infection. Therefore, to alleviate this infection the concerned body should focus on giving health education for hand wash after defecation and storing food in a closed container later use is mandatory.

Modeling of Liquid Hot Metal Sloshing in Ladles During Transportation by Locomotives (A Bond Graph Method)

Safe and secure transportation of liquid hot metal in steel plants is very challenging. About ninety percent of transportation is by means of locomotives. Sloshing is a common phenomenon in open container liquid transportation due to external excitation. Non-linear sloshing dynamics of liquid hot metal in ladle due to locomotive movement is the prime consideration of this paper. Liquid hot metal inside the ladle has been considered in the line of an equivalent mechanical system. Resulting forces and moments acting on the ladle inside wall are considered equal in all senses. An equivalent mechanical dynamic system representation of sloshing by bond graph modellinghas been formulated by keeping records in a satisfactory way.Future research scopes has been identifiedin parallel with an outline mapped. Hot metal liquid has two distinct components of the hydrodynamic pressure in consideration of rigid containershas been identified. Bottom segment of the molten metal column moves unison with the ladleandis directlyproportional with the acceleration of the ladle. Whereas the second one ‘convective’ pressure at the free surface, particularly experiences the sloshing tendency due to external forces.

EFEK EDIBLE COATING PADA KUALITAS ALPOKAT (PERSEA AMERICA MILL ) SELAMA PENYIMPANAN

Research has been carried out entitled the effect of carrageenan addition Eucheuma cottonii and glycerol as edible coating of avocado fruit (Persea americana Mill.) From Takengon, Central Aceh Regency to extend storage time. This study aims to find out how the effect of the addition of carrageenan concentration variations Eucheuma cottonii and glycerol as edible coatings in extending the shelf life of avocados (Persea americana Mill.). The variations in the concentration of comparable carrageenan and glycerol used as edible coating are 2: 2%, 3: 2%, 4: 2%, 2: 3%, 3: 3% and 4: 3% in distilled water. The coating process is done by dipping avocados for 1 minute and stored at room temperature for 10 days in an open container. The results showed that the physical appearance of avocados was best obtained from edible coating with variations in concentrations of 2: 2%, 2: 3% and 3: 3% (carrageenan: glycerol) characterized by bright flesh color, hard texture, fresh aroma and good taste, while avocados at carrageenan concentrations and glycerol 3: 2%, 4: 2% and 4: 3% indicate poor conditions and are not suitable for consumption. Avocados with edible coating 2: 2%, 2: 3% and 3: 3% were then tested and obtained by weight loss in a row of 11.562%, 8.815% and 9.34%, moisture content 73.73%, 65.77% and 77.84%, reducing sugar levels 1.15%, 0.80% and 0.97% and vitamin C levels 0.17%, 0.16% and 0.31%.