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  Principles of HVAC System The following factors determine the capacity of HVAC system. Heating : The amount of thermal energy that needs to be added to the space. Cooling : Thermal energy will sometimes need to be removed from a particular space in order to bring the temperature down. Humidifying : The process of increasing the relative humidity through the addition of water vapor into the system. Dehumidifying : Process of removing water vapor from the given space. Cleaning : Purifying the air by the removal of dust, smoke, pollen and other pollutants. Air Movement : Ensuring that there is movement of air to keep the inhabitants comfortable.... more read...

Salaries & Pensions increase Pakistan budget The government has proposed 10 percent increase in the salaries of federal employees. A 50% increase in House Rent for federal employees A total of 342 billion fixed for pensions. Minimum pension is raised from Rs6,000 to Rs10,000. A raise from Rs4,500 to Rs7,500 in Family Pension has been proposed Minimum Rs15,000 pension proposed for people above 75 years

Procedures To begin blood pressure measurement, use a properly sized blood pressure cuff. The length of the cuff's bladder should be at least equal to 80% of the circumference of the upper arm. Wrap the cuff around the upper arm with the cuff's lower edge one inch above the antecubital fossa. Lightly press the stethoscope's bell over the brachial artery just below the cuff's edge. Some health care workers have difficulty using the bell in the antecubital fossa, so we suggest using the bell or the diaphragm to measure the blood pressure. Rapidly inflate the cuff to 180mmHg. Release air from the cuff at a moderate rate (3mm/sec). Listen with the stethoscope and simultaneously observe the sphygmomanometer. The first knocking sound (Korotkoff) is the subject's systolic pressure. When the knocking sound disappears, that is the diastolic pressure (such as 120/80). Record the pressure in both arms and note the difference; also record the subject's position (...

Google has started the global roll-out of its new Chat messaging service, which is designed to replace SMS text messages on Android phones. Chat has features such as group texts, videos, typing indicators and read receipts, which are not available when sending SMS texts. Chat will be integrated with the default messages app on Android phones. However, it will be up to mobile operators to enable the service and it does not offer encrypted messages. The new system has been in development for several years, but is now beginning to appear on Android phones.