Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Demand time

There are technological possibilities for achieving these goals, but they will require considerable R D and commercial demonstration before they become real. This will demand time - perhaps 20 or more years - and a level of fitnds that to a large extent will have to come from governments. [Pg.65]

Longman, Jere. Test Results Demand Time for Introspection. Netv York Times, November 15, 2003, p. DL The disparity between the very strict drug bans for Olympic athletes and the relatively minor sanctions recently enacted by Major League Baseball has provoked questions of fair-... [Pg.187]

A further possible and important application for the Na/S and ZEBRA cells is in load levelling . By this is meant the storage of electrical energy from power supply generators when demand is relatively low and its release into the supply network (the grid ) at peak demand times. In this way the generators can be run continuously at their optimal efficiency speeds. [Pg.182]

It should be remembered that DFT is designed to reproduce the ground-state density of the system under consideration. It is not concerned with excited states and so the relative energy of filled and empty orbitals is not as well defined as in the H F approach. We will see thaf in solid-state calculations, this results in a poor estimation of the band gap for insulators when using LSDA or GGA functionals. To tackle excitations directly, the more computationally demanding time-dependent DFT methodology has been developed and this does allow spectroscopic excitation energies to be calculated [24]. [Pg.331]

The first two years of medical school are a demanding time for medical students. Whether the school follows a traditional curriculum or one that is case-based, every student is expected to learn and be able to apply basic science information in a clinical situation. [Pg.201]

There are really two phases in the pursuit of protein crystals for an X-ray diffraction investigation, and these are (1) the identification of chemical, biochemical, and physical conditions that yield some crystalline material, though it may be entirely inadequate, and (2) the systematic alteration of those initial conditions by incremental amounts to obtain optimal samples for diffraction analysis. The first of these is fraught with the greater risk, as some proteins simply refuse to form crystals, and any clues as to why are elusive or absent. The latter, however, often proves to be the more demanding, time-consuming, and frustrating. [Pg.28]

Molecular dynamics examines the temporal evolution of a collection of atoms on the basis of an explicit integration of the equations of motion. From the point of view of diffusion, this poses grave problems. The time step demanded in the consideration of atomic motions in solids is dictated by the periods associated with lattice vibrations. Recall our analysis from chap. 5 in which we found that a typical period for such vibrations is smaller than a picosecond. Hence, without recourse to clever acceleration schemes, explicit integration of the equations of motion demands time steps yet smaller than these vibrational periods. [Pg.352]

GE is a protracted process in areas where farmers are growing many numbers and types of varieties. Actually, it is easier to assess the loss of a variety in modem agriculture based on IVs in countries which are not at the centre of diversity than in a country such as Ethiopia at the centre of diversity. Besides, GE demands time series data, and it is very difficult to quantify the same in the centre of diversity. [Pg.71]

Hydrogen can be generated at off-peak rates, but that is easier to do at a centralized product facility than at a local filling station, which must be responsive to customers who typically do most of their fueling during the day and early evening, the peak power demand times. [Pg.173]

Safety stock costs If the demand time, the transit time, or both are uncertain, it may be necessary to carry inventory as a buffer against demand uncertainty. As discussed earlier, the extent of this inventory buffer depends on the magnitude of the demand uncertainty during the supply lead time and the planned in-stock service level. If the planned in-stock probability is expressed as service and the demand over lead time has a standard deviation of ct i, then the safety stock level is expressed as (Note that we assume that... [Pg.33]

Tp = preparation time per lay (min) r = demand time constraint from the sewing room (min)... [Pg.88]

Coal gasification units offer unique flexibility in that the syngas can also be chemically converted to liquid fuels for use in transportation (coal liquefaction). Alternatively the hydrogen can be refined from the synthesis gas to produce hydrogen fuel. An integrated combined cycle (IGCC) power plant could be used for electric power production during peak demand times and then shifted to liquid fuel production at nonpeak demand times. [Pg.425]

Nevertheless, some of the improvement processes will initially lead to investments for the companies. The investments do not have to be large, but they will demand time from some of the employees. The management needs to be aware of the fact that the earnings will not necessarily become visible immediately after investing the money. Improvement processes can only be successful if the management has a long-term planning. [Pg.549]

Knowledgetransfer needs to be considered in some cases of collaboration wherein the knowledge is not easily replicable and transferable (Kessler et al, 2000). The stickiness nature of the valuable knowledge demands time, effort, and cost to transfer. [Pg.165]

The main difference between these is that information exists without a dependency on its owner and is easily transferable, whereas on the contrary, knowledge is formed and shared in/ between minds through experiences, successes, failures, learning over time, and therefore, the stickiness of the IT demands time, effort, and cost to transfer (Tiwana, 2001, p. 37 Kessler et al., 2000). The transferability consists of both parts one portion that is readily transferable and the other portion which is not easily transferable. Even though the collaboration tool has been... [Pg.168]

Under case 1, the purpose of the allocation is to reserve a certain amount of product for each demand class to insure that the demand class receives an appropriate level of service. Thus, if over the demand time horizon the demand for A exceeded Ya + Yab, but the demand for B was less that Yb, demand for A would go unmet even though product designated for B remained available. The motivation for this approach is to insure that there is product available to insure future demand for B is met. This might be done to insure a certain service level to B or in the case where B had a much higher profit margin than A. Under case 2, once the allocation is carried out, there is a cost associated with transferring product from one demand class to another. For example, Ya and Yb could represent amounts shipped to particular retail outlets and Yab could represent product kept in a warehouse that supplied both A and B. In this case, as demand is realized it could be that product is moved from one category to... [Pg.461]

Therefore, powerful time integrators such as LIMFX, RADAU5 or DASSL [4, 6, 10] should be used to solve these complex systems. The advantage of the whole strategy is obvious the user only provides a suitable spatial mesh, the demanding time integration of the stiff system is automatically and adaptively done by a black-box solver. This first element of adaptivity is already quite popular. [Pg.136]

ABSTRACT This study contributes to identification of psychosocial risk factors in non-teaching staff. The study is exploratory and descriptive. It consists in descriptive statistics of responses to a questionnaire for identification of psychosocial risk factors (translated and adapted from F-PSICO), as well as in content analysis of responses to semi-structured interviews. The results show that the non-teaching staff needs to hide emotions and feelings and also that some of the situations that affect psychologically relate to relationships with co-workers. It is stated that there is no team spirit and that these relations are not satisfactory. With the day-to-day workload, these workers are forced to interrupt work and perform various tasks at the same time, dealing with a day-by-day of ((breakneck pace , ((intense and ((very full journey. Psychological demands, time autonomy, workload, relationships and social support are psychosocial risk factors that play an important role in the performance of these workers. Finally, some measures to control these risks were recommended. [Pg.261]

Commodity price speculation, strong world demand, time delays or geological limitations on increasing production, OPEC monopoly pricing, and increasingly important contribution of the scarcity rent. [Pg.485]

Adults have significant concerns which may compete with the learning process. They have jobs that demand time, thought, and effort. They have family responsibilities. They may be busily involved in community, club, and volunteer activities. They tend to have many things on their minds. [Pg.129]

Ultraviolet (UV) adhesives are used if situations demand time to adjust parts followed by rapid curing. Applications include bonding plastic and metal trim to glass shelves in refrigerators. [Pg.65]


See other pages where Demand time is mentioned: [Pg.47]    [Pg.222]    [Pg.361]    [Pg.123]    [Pg.238]    [Pg.18]    [Pg.78]    [Pg.391]    [Pg.88]    [Pg.232]    [Pg.47]    [Pg.274]    [Pg.116]    [Pg.40]    [Pg.116]    [Pg.89]    [Pg.52]    [Pg.144]    [Pg.789]    [Pg.256]    [Pg.90]    [Pg.95]    [Pg.99]    [Pg.515]    [Pg.226]    [Pg.355]    [Pg.139]    [Pg.25]    [Pg.548]    [Pg.726]   


SEARCH



Lead-time demand

© 2024 chempedia.info