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Seated person

In 1998 two units, olf and decipol, were introduced to quantify sensory source emissions and perceived air quality [15]. This theory is based on the assumption that the pollutants in buildings all have the same relation between exposure and response after one factor normalisation based on human bioeffluents. Emission rates are measured in olf, where 1 olf is defined as the emission rate causing the same level of dissatisfaction as bioeffluents from one seated person at any airflow. Concentration or perceived air quality is measured in decipol. One decipol is defined as the concentration of pollution causing the same level of dissatisfaction as emissions from a standard person diluted by a clean airflow of 101/s. In this context perceived air quality is the dissatisfaction with or the acceptability of lAQ. [Pg.186]

Vertical Shocks. Exposure to single shocks applied to a seated person directed from the seat pan toward the head ( headward ) has been studied in connection with the development of aircraft ejection seats, from which the conditions for spinal injury and vertebral fractures have been documented (Anon., 1950 Eiband, 1959). Exposure to intense repeated vertical shocks is experienced in some off-die-road vehicles and high-performance military aircraft, where spinal injury has also been reported. A headward shock with acceleration in excess of g = 9.81 m/s (the acceleration of gravity) is likely to be accompanied by a downward ( tailwaid ) impact, when the mass of the torso returns to being supported by the seat. [Pg.235]

Apparent Mass of Seated Persons. The apparent mass is often used to describe the response of the body at the point of stimulation rather than the mechanical impedance, and is the complex ratio between the dynamic force applied to the body and the acceleration at the interface where vibration enters the body. It is commonly expressed as a function of frequency, and is equal to the static weight of a subject in the limiting case of zero ftequency when Ae legs are supported to move in unison with the torso. The influence of posture, muscle tension, and stimulus magnitude on the... [Pg.240]

FIGURE 10.4 Effect of posture (N— normal E—erect B—with backrest), muscle tension (T— tensed muscles), and stimulus magnitude (0.25,0.5,1.0, and 2.0 m/s ) on the apparent mass of a seated person for four subjects (see text for explanation). (Fairley el at., 1989.)... [Pg.240]

FIGURE 10.5 Idealized values for the modulus and phase of the seat-to-head transmissibility of seated persons subjected to vertical vibration. The envelopes of the maximum and minimum mean values of studies included in the analysis are shown by thick continuous lines, and the mean of all data sets is shown by the thin line. The response of a biodynamic model (see text and Fig. 10.8) is plotted as a dash-dot line. (ISO 5982, 2001.)... [Pg.241]

Seat-to-Head TransmissibUity. The transmissibility expresses the response of one part of a mechanical system (e.g., the head or hand) to steady-state forced vibration of another part of the system (e.g., the buttocks), and is commonly expressed as a function of frequency. A synthesis of measured values for the seat-to-head transmissibility of seated persons has been performed for vibration in the vertical direction, to define the idealized transmissibility. The idealiz transmissibility attempts to account for the sometimes large and unexplained variations in the results from different experimental studies conducted under nominally equivalent conditions. The results of one such analysis are shown by the continuous lines in Fig. 10.5 (ISO 5982, 2001). It can be seen by comparing Figs. 10.4 and 10.5 that the characteristic peak of the apparent mass remains in the modulus of the idealized transmissibility. [Pg.242]

Vibration Isolation. Excessive whole-body vibration is most commonly encountered in transportation systems, where it predominandy affects seated persons. In consequence, an effective rem ial measure is to reduce the vertical component of vitHation transmitted through seats (and, where... [Pg.252]

Standard kitchen counters are 36 in high. This is adequate for disabled and nondisabled standing people but too high for people who are seated. Counter heights of 30, 32, and 34 in are more comfortable for a seated person to use for food preparation. This disparity will obviously make the design of a kitchen for use by standing and seated people difficult. [Pg.923]

A mirror suspended above the cooking area allows vision into pots for a seated person. [Pg.924]

Take care in wet or icy weather, particularly on sloping pavements, as wheelchairs tend to slide to the lowest point. Lack of maintenance or poor maintenance can lead to the wear or failure of components that may cause the wheelchair or the user to change position unexpectedly. This could lead to the user falling from the wheelchair or tipping over with the wheelchair. Adhere to manufacturer s maintenance instructions. Always use a qualified technician to service or repair the wheelchair. If the wheelchair is approved by the manufacturer for transportation of a seated person in a vehicle, make sure that you use the wheelchair tie-down and occupant restraint system specified by the manufacturer. If using large public buses or trains, use the dedicated wheelchair space and any restraint systems provided. [Pg.293]

Functional data - the movement of a part of the body in relation to a fixed point, e.g. the reach distance of a seated person. [Pg.455]

Exposures of seated persons to whole-body vibration are influenced by seating dynamics. In some environments the dynamic response... [Pg.327]

As discussed in Chapter 3, this is the ultimate vision. Safety becomes a value linked to every priority in the workplace or wherever we find omselves. Priorities change according to circumstances values are deep-seated personal beliefs beyond compromise. [Pg.480]

One of the most critical factors is draft. Many people at low activity levels (seated/standing) are very sensitive to air velocities, and therefore draft is a very common cause for occupant complaints in ventilated and air-conditioned spaces. Fluctuations of the air velocity have a significant influence on a person s sensation of draft. The fluctuations may be ex-... [Pg.378]

Eor specific applications, we can calculate the ratio of the measure of the goods or sendees provided to the energy input required. For example, in the transportation sector, energy efficiency is based on miles per gallon for personal vehicles, seat-miles per gallon for mass transit, and ton-miles per gallon for freight transportation. [Pg.369]

Another common example of an incomplete scope occurs when a person buys a car. The list price of a car may be around 3,000, but rarely does anyone pay under 3,500, and the price may reach 4,500. Most people do not want just a car. They also want certain extras a radio, power steering, power brakes, bucket seats, a floor shift, whitewall tires, and so on. When a person asks the price of a car, he wants the dealer to include the extras. The dealer, on the other hand, gives the price of the stripped-down car, since he would probably scare the customer away if he included every possible extra in his quotation. [Pg.58]

Now consider an example that is closely related to that presented in the previous section. An ensemble of n prospective clients are waiting to be seated in a restaurant Here, unlike the case of the doctor s waiting room, there is a hostess, whose role is to select the appropriate ensemble of r clients to be seated at a given table. It is now of interest to determine the number of combinations (or selections) of n things r at a tiine. In this case the order of the members of the ensemble of r persons has not been considered. It is useful, then, to denote the number of combinations by C n,r, which can be found by the following argument... [Pg.339]

The breathing cycle for meditation is as follows. Empty your lungs, then inhale deeply to a count of four. Hold the breath for a count of two, then exhale completely to a count of four. Retain the tightened diaphragm for two counts, then inhale to a count of four. This number-count should be your own, matched to your lungs capacity. One person s breath cycle may be quicker than another s. Listen to your breath cycle. It should be almost inaudible. If your breath cycle is noisy, it is not being performed correctly. The remedy is to slow the cycle down. Once you are seated for meditation, establish this breath cycle of four-two-four. Once you have consciously performed it for six full cycles of inhalation and exhalation, then dismiss it from the mind and mentally move on to the next phase of the meditation. [Pg.20]

The metal copper, the rose flower, and the color green are all empirically assigned to the planet Venus, which is the mundane chakra (the macro-cosmic manifestation) of Netzach. Within the personality, Netzach is the seat of the desire-nature. Green, in Alchemy, always represents the manifestation of a power as it appears in nature as being incomplete, since the Sages hold that creation is still in process, that it is, as yet, an unfinished work. So the copper coins spoken of in the Turba are the manifestations (coins) of our desires (copper). [Pg.158]

At each Post, following a presentation by the briefing team, those still interested stayed in their seats and filled out the numerous pages of the personal history form. Then they spent up to an hour and a half completing the Minnesota Multiphasic Personality Inventory (MMPI), a widely used instrument for detecting psychiatric problems or profiling personality characteristics. [Pg.32]

Four samplers of the bubbler type ealibrated for 20 ml of liquid in eaeh were operated at 13.1 liters per minute for the first minute. After the first minute was eompleted, the volume veloeity for the seeond minute was 14.1 liters per minute. The four samplers were distributed as follows three were approximately at the nose level of a person seated in the chamber the fourth sampler was suspended from the roof at the geometric center of the chamber quite close to the head of the person seated in the chamber. [Pg.332]

N. J. Rummo, J. H. Knelson, S. Lassiter, and J. Cam (personal communication) exposed 22 male volunteers, aged 19-27, to ozone at 0.4 ppm for up to 4 h in relatively clean ambient air or to ambient air alone. Subjects were seated during exposure, except for two 15-min exercise periods on a bicycle ergometer at 700 kg-m-min exercise that about doubled the heart rate and quadrupled the ventilation volume. [Pg.406]

U.S. Senator John Glenn is also an American national hero. He was the first man to orbit the earth way back in 1962. He wasn t a one hit wonder. He went on to hold a seat in the United States Senate and then go BACK into space near his 77th birthday. Do you think he has ambition, confidence and personal power Check out his t-bars and think about his success. We could all learn a thing or two about success from Mr. John Glenn. [Pg.43]

I do not recall inviting you to be seated, woman. Who is this person you want me to find ... [Pg.7]

I knew nothing about him except that his name was uncommon and nobles from small clans rarely win election to senior offices. He must be personally impressive or extremely rich or both. Violetta was not much better informed, unable to tell me what other posts he had held, or what allies had helped him win his seat in the Senate. [Pg.15]


See other pages where Seated person is mentioned: [Pg.45]    [Pg.126]    [Pg.106]    [Pg.131]    [Pg.295]    [Pg.241]    [Pg.252]    [Pg.254]    [Pg.468]    [Pg.45]    [Pg.126]    [Pg.106]    [Pg.131]    [Pg.295]    [Pg.241]    [Pg.252]    [Pg.254]    [Pg.468]    [Pg.361]    [Pg.80]    [Pg.125]    [Pg.250]    [Pg.780]    [Pg.285]    [Pg.53]    [Pg.44]    [Pg.15]    [Pg.339]    [Pg.522]    [Pg.32]    [Pg.89]    [Pg.29]    [Pg.166]   
See also in sourсe #XX -- [ Pg.455 , Pg.468 ]




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Seating

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