scholarly journals Design and Development of Isolating Pods to Prevent the Spread of Coronavirus or Other Viruses for Hospital and Domestic Purposes

2021 ◽  
pp. 193758672110453
Author(s):  
Goonesh Kumar Bahadur ◽  
Abha Jodheea-Jutton ◽  
Wafaa Binti Mowlabaccus ◽  
Devkumar Callychurn ◽  
Sabrina Ramasamy
Keyword(s):  
Carbon Dioxide ◽  
Relative Humidity ◽  
Air Monitoring ◽  
Small Country ◽  
Design And Development ◽  
Infected People ◽  
Design And Construction

Objectives: This project investigated into the design and construction of an isolation pod to keep infected people in quarantine, thus avoiding the spread of viruses such as the COVID-19. This product was made to be used in hospitals and at homes. Background: Mauritius is among the few countries, which has not had any cases of COVID-19 since for since May 2020 for a period of 150 days. It has opened its borders since October 2020, and since Mauritius being a small country, the spread of any type of virus can be imminent if not controlled properly. In case there is another spread of the COVID-19 in Mauritius, then the isolation pod could be used to keep infected people in quarantine. The aims of the study were to develop a prototype of an isolation cubicle that is collapsible and can be easily erected at homes or in hospitals, whenever the need arises. Methods: A prototype of the pod was made with metal bars welded together and tarpaulin materials were sewn together. A HEPA Fan Extractor was fitted inside the pod to allow the air to circulate. Results: the tests carried out the pod could easily be assembled, transported and stored for further usage. From the volunteers’ feedback, it was found that the pod was comfortable, spacious, and practical. The air monitoring tests carried on the carbon dioxide, temperature, and relative humidity were within the acceptable ranges.

Turbulent plumes of heat, moist heat, and carbon dioxide elicit upwind anemotaxis in tsetse flies Glossina morsitans morsitans Westwood (Diptera: Glossinidae)

2002 ◽  
Vol 80 (7) ◽  
pp. 1149-1155 ◽  
Author(s):  
W G Evans ◽  
R H Gooding
Keyword(s):  
Carbon Dioxide ◽  
Wind Tunnel ◽  
Relative Humidity ◽  
Glossina Morsitans Morsitans ◽  
Tsetse Flies ◽  
Glossina Morsitans ◽  
Low Velocity ◽  
Upwind Flight ◽  
Moist Heat ◽  
Heated Air

The roles and interactions of turbulent plumes of heat, moist heat, and carbon dioxide in mediating upwind flight of adult tsetse flies (Glossina morsitans morsitans Westwood) were investigated using a wind tunnel in a constant-environment chamber. Heat fluctuations in the plume that were detected by a thermocouple and displayed as oscilloscope traces allowed direct visualization of the structures of the plumes. Significantly more flies flew upwind when exposed to plumes of (i) carbon dioxide (0.0051% above background) and air (58% relative humidity) compared with air alone; (ii) carbon dioxide and heated air (35% relative humidity and temperature fluctuating up to 0.09°C above background) compared with carbon dioxide and air; and (iii) carbon dioxide and moist (82% relative humidity) heated air (temperature fluctuating up to 0.05°C above background) compared with carbon dioxide and heated air. However, there were no significant differences in upwind flight of flies exposed to plumes of (i) air compared with humidified air (65% relative humidity); (ii) carbon dioxide and heated air compared with heated air alone; and (iii) carbon dioxide and moist heated air compared with moist heated air alone. Recorded temperature fluctuations in heat plumes transported downwind from a tethered steer in a pasture showed patterns similar to those produced in the wind-tunnel plumes. These results suggest that host emissions of carbon dioxide alone and combined heat and moisture carried downwind by low-velocity winds elicit upwind anemotaxis in tsetse flies, which distinguish these emissions from a background of lower atmospheric levels.

DESIGN AND CONSTRUCTION OF AN AUTOMATED HOT-GAS CYCLE CALORIMETER FOR CARBON DIOXIDE COMPRESSORS

2015 ◽  
Author(s):  
Alexsandro dos Santos Silveira ◽  
Everton Machado ◽  
Fernando Testoni Knabben
Keyword(s):  
Carbon Dioxide ◽  
Hot Gas ◽  
Design And Construction

Dangers to malacological collections: Bynesian decay and pyrite decay

2014 ◽  
Vol 28 (1-2) ◽  
pp. 35-46
Author(s):  
Daniel Caracanhas Cavallari ◽  
Rodrigo Brincalepe Salvador ◽  
Bruno Rodrigues da Cunha
Keyword(s):  
Carbon Dioxide ◽  
Relative Humidity ◽  
High Relative Humidity ◽  
Museum Collections ◽  
Storage Media ◽  
Glass Containers ◽  
Special Concern ◽  
Materials Used ◽  
Archival Quality ◽  
Plastic Containers

Abstract Specimen deterioration in museum collections and exhibits is a recurring worry of curators. Malacological collections, i.e., those containing mollusk shells, are of special concern, because these specimens are composed largely of calcium carbonate, a compound that easily deteriorates in acidic storage media. There are two main problems related to the presence of volatile acids in collections: Bynesian decay and pyrite decay. In Bynesian decay, acetic and formic acids, among others, are released by the materials used to store the collection: wood, varnishes, resins, paper, cardboard, and other storage materials. Under high relative humidity and inappropriate temperature, the acids react with the shells' carbonate, yielding salts and carbon dioxide. Pyrite decay is similar in appearance: fossil specimens may contain pyrite (FeS2), which in high relative humidity is oxidized, yielding sulfuric acid and other products. This acid corrodes other shells, including carbonatic fossils. The damage caused is irreversible, but there are methods to avoid or mitigate it. The collection should be kept in conditions of low relative humidity (45–50%) and appropriate temperature range (16–21°C). The use of archival materials, such as steel drawers and cabinets with electrostatic coating, is mandatory. Specimens containing reactive pyrite must be kept in archival-quality plastic containers or closed glass containers. Damaged specimens must be immediately removed and only returned to the collection after proper cleaning.

Design and Development of a Sun Tracking Mechanism Using the Direct SMA Actuation

2011 ◽  
Vol 133 (7) ◽  
Author(s):  
N. Jeya Ganesh ◽  
S. Maniprakash ◽  
L. Chandrasekaran ◽  
S. M. Srinivasan ◽  
A. R. Srinivasa
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Functional Model ◽  
External Source ◽  
Thermal Stimulus ◽  
The Sun ◽  
Design And Development ◽  
Dual Functions ◽  
Made In ◽  
Design And Construction

An attempt has been made in this work to develop a simple yet efficient sun tracking mechanism (SSTM) using smart shape memory alloy (SMA). This mechanism is directly activated by the sun dispensing with the requirement of an additional external source to power it. The SMA element incorporated in the SSTM device performs the dual functions of sensing and actuating in such a way as to position the solar receptor tilted appropriately to face the sun directly at all times during the day. The mechanism has been designed such that the thermal stimulus needed to activate the SMA element is provided by the concentration and direct focusing of the incident sun rays on to the SMA element. This paper presents, in detail, the design and construction adopted to develop the functional model that was fabricated and tested for performance.

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