Video Experimental Relacionado
Updated: Jul 5, 2026

07:32
Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns
Published on: April 10, 2017
Resumen
Los casos de fiebre del dengue en Guyana han aumentado dramáticamente, con 50 infecciones encontradas en una evaluación clínica de 2 días. Esto contrasta fuertemente con los años anteriores, lo que indica una importante preocupación por la salud pública.
Área de la Ciencia:
- Entomología médica Entomología médica.
- La medicina tropical es una medicina tropical.
- Epidemiología La epidemiología.
Sus antecedentes:
- La incidencia de la fiebre del dengue (DF) y la fiebre hemorrágica del dengue (DHF) ha aumentado significativamente en toda América del Sur.
- Guyana históricamente reportó casos mínimos de dengue, con menos de cinco anualmente durante la mayor parte de la última década.
- Una reciente evaluación clínica de dos días en Georgetown, Guyana, identificó 50 infecciones por dengue.
Palabras clave:
Las Américas son las Américas.El dengue es una fiebre del dengue.Países en desarrollo Países en desarrollo.Enfermedades Las enfermedades.Exámenes y diagnósticos.Guyana Guyana es el nombre de la Guyana.Medición de la medición.Prevalencia La prevalencia es la cantidad de personasMetodología de investigación Metodología de investigación.Informe de Investigación Informe de InvestigaciónEl cribado de detección.América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del Sur América del SurEnfermedades virales Las enfermedades virales.Videos de Conceptos Relacionados
Decreased Body Temperature
A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by sustained extreme cold exposure, and severe...
Temperature and Thermal Equilibrium
Heat and temperature are essential concepts for everyone every day. The study of heat and temperature is part of an area of physics known as thermodynamics. It is not always easy to distinguish heat and temperature.
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...
Thermal Expansion
The expansion of alcohol in a thermometer is one of many commonly encountered examples of thermal expansion, which is the change in size or volume of a given system as its temperature changes. The most visible example is the expansion of hot air. When air is heated, it expands and becomes less dense than the surrounding air, which then exerts an upward force on the hot air to, for example, make steam and smoke rise, and hot air balloons float. The same behavior happens in all liquids and gases,...
Adiabatic Processes for an Ideal Gas
When an ideal gas is compressed adiabatically, that is, without adding heat, work is done on it, and its temperature increases. In an adiabatic expansion, the gas does work, and its temperature drops. Adiabatic compressions actually occur in the cylinders of a car, where the compressions of the gas-air mixture take place so quickly that there is no time for the mixture to exchange heat with its environment. Nevertheless, because work is done on the mixture during the compression, its...
Efficiency of The Carnot Cycle
The hypothetical Carnot cycle consists of an ideal gas subjected to two isothermal and two adiabatic processes. Since the internal energy of an ideal gas depends only on its temperature, which is the same before and after the completion of the Carnot cycle, there is no change in its internal energy. Hence, using the first law of thermodynamics, the total heat exchanged by the ideal gas equals the total work done. Thus, we can quantify the efficiency of the Carnot cycle via the heat exchanged...
Hot Weather Concreting
Concreting at elevated temperatures accelerates the hydration process, leading to quicker setting but potentially reducing the long-term strength of the concrete structure. Additionally, low air humidity fosters rapid moisture loss from the concrete, resulting in reduced workability, pronounced plastic shrinkage, and a higher likelihood of crazing.
Mitigating the heat increase in concrete can be economically achieved by shading aggregate stockpiles to prevent heating from solar radiation,...
Mitigating the heat increase in concrete can be economically achieved by shading aggregate stockpiles to prevent heating from solar radiation,...

