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Electric bus was first introduced globally in 1882 and is now gaining popularity due to increasing global concern on emissions. Buses are one of the most pollution emitting vehicles in a country which are mostly used as public transport. However there have been made several up-gradations in the engine technologies for evolve with the buses with least emission; however the increasing number of public transport due to the increasing population is raising the emission levels. The evolution and penetration of electric and hybrid and fuel cell buses in the global bus market has been observed to be the only solution for emission controls from public transport.

Concrete is the prime essential construction materials for all type of construction project, and serve the essential requirements of civil structures such as strength and durability of the final structure. Concrete consists of mixture of sand, aggregate, binder, water and admixtures.

Safety is on of the major concern for the national and state governments. Installing proper security system is one of the major demands for the building owners especially corporate and government buildings, also government vehicles. Among various security systems bulletproof security glass is in great demand in the recent due to increasing terror attacks and other security purposes. Bulletproof security glass also known as ballistic glass, transparent armor or bullet-resistant glass are any type of class made up of strong but optically transparent material that can resist any damage while stuck by stone or bullets. However, these glasses are not completely impenetrable. Bulletproof security glasses are generally made up of combination of two or more kind of glasses (one hard and one soft). The softer layer makes the glass more elastic so that it can flex instead of shatter while stuck with any hard material such as stones or bullets. Bulletproof security glasses come in different forms depending on the thickness of the glass that is between 19mm to 76mm thickness.

Medical ultrasound refers to a technology that uses high frequency sound wave to produce diagnostic images. Medical ultrasound is also known as sonography. Medical ultrasound is a non-invasive and safe procedure for examination of body parts such as the heart, organ and blood vessel in the abdomen and joints. Medical ultrasound uses non ionizing radiation and has greater sensitivity compare to other clinical examination. Medical ultrasound images are taken with the help of ultrasound gel. Ultrasound gels are conductive medium used by technicians and physicians before diagnosis of patient for clear diagnostics images. Medical ultrasound displays its output in various form such as audio, visual and graphics. Musculoskeletal, thyroid and scrotal ultrasound are some other procedure used to diagnose diseases. Medical ultrasound is performed by technologist with the help of ultrasound machines. Transducer probe, central processing unit, disk storage device are some important parts of the ultrasound machines. Medical ultrasounds are used in case of abdominal, cardiac, maternity, gynaecological and urological examinations. Medical ultrasound is also used in breast and small tissues examinations. Sonar device is most commonly used ultrasound equipment. Some of the medical applications of ultrasound are foetal monitoring, diagnostic imaging and blood flow management. Medical ultrasound imaging is also used in medicine as it provides guidelines to doctors through precise medical procedures. Ultrasound is less expensive as compares to other surgical procedure.

Trucks market can be classified as light, medium and heavy based on their dimensions and load capacity. Heavy trucks market is solely dependent on the industrial progress in a country as it is used in carrying the raw materials for the industries as well as the finished goods from manufacturing location to its intended market. The logistics industry includes transportation modes in land, air and waterways. Land transport is further segmented into rail transport and road transport. The finished goods, especially the consumer goods are mostly transported by heavy trucks.

Forklift trucks, also known as fork truck, lift truck or forklift, are the type of industrial trucks which are used to lift and move heavy or bulk materials. The first forklift truck was developed in the early 20th century and their sales paced up after the Second World War when every major country started focusing on their industrial development. Nowadays, forklift trucks are being used widely across industries such as manufacturing and warehousing operations.

Food processing equipment helps to transform the raw food ingredients in to food items through various physical and chemical means. Food processing equipment are available in various categories which includes dryers, chillers, fryers, feeders, mixers, grinders, roasters, homogenizers, separators, slicers and ovens. These foods processing equipments are used in various industries including dairy industry, industrial bakery, poultry farm, seafood industry, chocolate manufacturing unit, confectionery, beverage industry, milk, fruit, nut, and vegetable industry. Stainless steel is one of the main elements, which is widely used in the food processing equipment. 304SS and 316SS are two most common types of alloys of stainless steel, which are used in food processing equipment.

Respiration is the most important metabolic process of the human body by which body obtains energy by reacting oxygen with glucose to release water, CO2 and energy in the form of adenosine triphosphate (ATP). Human respiratory system not only provides oxygen to every parts of the body, also removes body wastes, filtration of infectious agents and provides air needed for speech. Several factors, such as smoking and entrants of pollutants, affect respiratory system and causes diseases. Some respiratory diseases are temporary and less harmful. However, some may be life-threatening. For instance, asthma, cystic fibrosis (CF), chronic obstructive pulmonary disease (COPD), bronchiectasis, chronic bronchitis and pulmonary fibrosis are life-threatening respiratory diseases. Asthma is one of the serious condition in which the small airways of the affected person's lungs suddenly constrict when they are exposed to exercise, pollen or even dry air. Cystic fibrosis (CF) is an inherited disease that affects the body's exocrine glands which secrete saliva, mucus, tears and sweats. COPD is a group of diseases that involve progressive narrowing of the airways that service the lungs.

Polycystic ovarian syndrome is a common hormonal endocrine disorder. It is also known as Stein-Leventhal Syndrome. It caused due to formation of cysts on the ovary and don’t form sufficient amount of hormone to initiate ovulation. Some of the symptoms of PCOS are irregular ovulation, polycystic ovaries, excessive facial hair growth, skin problems, thinning of hair on the scalp, high level of androgens in the body and irregular or no menstrual periods. The symptoms of PCOS are not related to each other, so the condition is usually overlooked or undiagnosed. The cause of polycystic ovarian syndrome is unknown. Excessive insulin and low grade inflammation are some of the factors which may lead to polycystic ovarian syndrome. There are no specific tests for the diagnosis of polycystic ovarian syndrome. Physical examination, medical history, blood tests, pelvic examination and vaginal ultrasound helps in diagnosis of polycystic ovarian syndrome. Early diagnosis and treatment can help to control the symptoms and prevent long term complications. Some of the complications associated with polycystic ovarian syndrome are sleep apnea, infertility, abnormal uterine bleeding, high blood pressure, uterine cancer, cholesterol and lipid abnormalities and type II diabetes.

Body armor is a type of cloth used for protection with its main purpose is to absorb or deflect slashing bludgeon and penetrate attacks. Previously, only soldiers were only given license to use it but nowadays, it is also used by police, security guards and individuals in order to feel secure and protect themselves from attacks. There are two types of body armor namely soft body armor and hard body armor. Body armor is categorized on the basis of its capability to stop bullets. There are two well known standards of body armor. The international standard is set by a National Institute of Justice (NIJ) whereas UK standard is set by Home Office Scientific Development Branch (HOSDB).