Question: Claims that its bladeless fans produce a more constant airflow than traditional fans were made by a company that employs more than how many people worldwide?
Context: Dyson is a British-based company and manufacturer of bagless vacuum cleaners (using cyclonic separation and brushless electric motors), heatless hand dryers, bladeless fans/heaters, and robotic vacuum cleaners. A bladeless fan (sometimes called an air multiplier) blows air from a ring with no external blades.  Its blades are hidden in its base.  The first concept was created by Toshiba in 1981.  Dyson claims that its bladeless fans (U.S. Patent  ) produce a more constant airflow than traditional fans. Stuttering, also known as stammering, is a speech disorder in which the flow of speech is disrupted by involuntary repetitions and prolongations of sounds, syllables, words or phrases as well as involuntary silent pauses or blocks in which the person who stutters is unable to produce sounds.  The term "stuttering" is most commonly associated with involuntary sound repetition, but it also encompasses the abnormal hesitation or pausing before speech, referred to by people who stutter as "blocks", and the prolongation of certain sounds, usually vowels or semivowels.  According to Watkins et al., stuttering is a disorder of "selection, initiation, and execution of motor sequences necessary for fluent speech production."  For many people who stutter, repetition is the primary problem.  The term "stuttering" covers a wide range of severity, encompassing barely perceptible impediments that are largely cosmetic to severe symptoms that effectively prevent oral communication.  In the world, approximately four times as many men as women stutter, encompassing 70 million people worldwide, or about 1% of the world's population. A handheld fan is an implement used to induce an airflow for the purpose of cooling or refreshing oneself.  Any broad, flat surface waved back-and-forth will create a small airflow and therefore can be considered a rudimentary fan.  Generally, purpose-made handheld fans are shaped like a sector of a circle and made of a thin material (such as paper or feathers) mounted on slats which revolve around a pivot so that it can be closed when not in use. Dyson Ltd. is a British technology company established by James Dyson in 1987.  It designs and manufactures household appliances such as vacuum cleaners, hand dryers, bladeless fans, heaters and hair dryers.  Dyson employs more than 7,000 people worldwide. Variable Air Volume (VAV) is a type of heating, ventilating, and/or air-conditioning (HVAC) system.  Unlike constant air volume (CAV) systems, which supply a constant airflow at a variable temperature, VAV systems vary the airflow at a constant temperature.  The advantages of VAV systems over constant-volume systems include more precise temperature control, reduced compressor wear, lower energy consumption by system fans, less fan noise, and additional passive dehumidification. Infallible is the 7th studio album released by Jamaican recording artist Tanya Stephens.  This album was unique in the sense that it was a free download to all her fans.  Tanya released the album for free stating "Infallible by Tanya Stephens!  Feel free to forward the link to as many people as you wish.  The album is completely free of cost.  Enjoy!!"  Andrew Henton, Tanya's life partner and co-founder of Tarantula Records stated the reason the album was a free download was because Tanya wanted to do something special for her fans, the major reason being that there’s a recession going on, and things are already hard on everyone, he then stated that Tanya believes that when she gives an album to a major label (e.g. VP Records), technically she’s giving it away for free anyway, so she would much rather give it directly to the fans.  The website that originally hosted the album was BYM Riddim, although the website has since shut down making the album unavailable to download, although the album has been uploaded to other websites such as Mediafire & Rapidshare by fans making it easy enough to download.  Tanya approves of this, as it was a free album, she merely wanted the album to reach her fans.  The album was also given away as a hard copy with Jamaican-based German magazine, 'Riddim' and can be backordered. The spread of HIV/AIDS has affected millions of people worldwide; AIDS is considered a pandemic.  In 2009, the World Health Organization (WHO) estimated that there are 33.4 million people worldwide living with HIV/AIDS, with 2.7 million new HIV infections per year and 2 million annual deaths due to AIDS.  In 2007, UNAIDS estimated: 33.2 million people worldwide were living with HIV; AIDS killed 2.1 million people in the course of that year, including 330,000 children, and 76% of those deaths occurred in sub-Saharan Africa.  According to the UNAIDS 2009 report, some 60 million people worldwide have been infected with HIV, resulting in approximately 25 million deaths and 14 million orphaned children in southern Africa alone since the epidemic began decades ago. Fume hoods, also known as laboratory chemical hoods, are one of the most important and widely used engineering controls to protect workers in laboratories.  Fume hoods were introduced about 100 years ago to safeguard personnel working with hazardous materials.  While many changes and improvements have been made, the basic concept and design of fume hoods remains the same.  Air is drawn from the workplace, around the worker and into the front of the hood, and is then exhausted out of the laboratory.  Most laboratory hoods are described as constant air volume (CAV) hoods because they draw a constant amount of air at all times.  Rising energy costs have made these hoods exceptionally expensive to operate.  For example, a single six-foot hood operating 24/7/365 costs over $5,000/year to operate.  In addition, CAV hoods do not react rapidly to airflow disturbances (turbulence) within the hood or within the laboratory and, hence, their sole purpose of containment and protection can be seriously compromised. The human voice consists of sound made by a human being using the vocal folds for talking, singing, laughing, crying, screaming, etc.  The human voice frequency is specifically a part of human sound production in which the vocal folds (vocal cords) are the primary sound source.  (Other sound production mechanisms produced from the same general area of the body involve the production of unvoiced consonants, clicks, whistling and whispering.)  Generally speaking, the mechanism for generating the human voice can be subdivided into three parts; the lungs, the vocal folds within the larynx, and the articulators.  The lung (the pump) must produce adequate airflow and air pressure to vibrate vocal folds (this air pressure is the fuel of the voice).  The vocal folds (vocal cords) are a vibrating valve that chops up the airflow from the lungs into audible pulses that form the laryngeal sound source.  The muscles of the larynx adjust the length and tension of the vocal folds to ‘fine-tune’ pitch and tone.  The articulators (the parts of the vocal tract above the larynx consisting of tongue, palate, cheek, lips, etc.) articulate and filter the sound emanating from the larynx and to some degree can interact with the laryngeal airflow to strengthen it or weaken it as a sound source.
Answer: 7,000