|
VPD Anti-riot Officers
VPD may refer to: Science and technology * Vaccine-preventable diseases * Vapour phase decomposition, a method used in the semiconductor industry * Vapour-pressure deficit, a measure of the difference between air humidity and saturation Computing * Virtual private database, masks data in a larger database * Virtual product development, developing and prototyping products in a completely digital 2D/3D environment * Vital Product Data, in computer hardware or in AIX Object Data Manager terminology Other uses * Vancouver Police Department {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vaccine-preventable Diseases
A vaccine-preventable disease is an infectious disease for which an effective preventive vaccine exists. If a person acquires a vaccine-preventable disease and dies from it, the death is considered a vaccine-preventable death. The most common and serious vaccine-preventable diseases tracked by the World Health Organization (WHO) are: diphtheria, ''Haemophilus influenzae'' serotype b infection, hepatitis B, measles, meningitis, mumps, pertussis, poliomyelitis, rubella, tetanus, tuberculosis, and yellow fever. The WHO reports licensed vaccines being available to prevent, or contribute to the prevention and control of, 31 vaccine-preventable infections.World Health OrganizationGlobal Vaccine Action Plan 2011-2020.Geneva, 2012. Background In 2012, the World Health Organization estimated that vaccination prevents 2.5 million deaths each year. With 100% immunization, and 100% efficacy of the vaccines, one out of seven deaths among young children could be prevented, mostly in developing c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vapour Phase Decomposition
Vapour phase decomposition (VPD) is a method used in the semiconductor industry to improve the sensitivity of total-reflection x-ray fluorescence spectroscopy by changing the contaminant from a thin layer (which has an angle-dependent fluorescence intensity in the TXRF-domain) to a granular residue. When using granular residue the limits of detection are improved because of a more intense fluorescence signal in angles smaller than the isokinetic angle. Method When using granular residue the limits of detection are improved because of a more intense fluorescence signal in angles smaller than the isokinetic angle. This can be achieved by enhancing the impurity concentration in the solution to be analyzed. In standard atomic absorption spectroscopy (AAS), the impurity is dissolved together with the matrix element. In VPD, the surface of the wafer is exposed to hydrofluoric acid vapour, which causes the surface oxide to dissolve together with the impurity metals. The acid drople ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vapour-pressure Deficit
Vapour-pressure deficit, or VPD, is the difference (deficit) between the amount of moisture in the air and how much moisture the air can hold when it is saturated. Once air becomes saturated, water will condense out to form clouds, dew or films of water over leaves. It is this last instance that makes VPD important for greenhouse regulation. If a film of water forms on a plant leaf, it becomes far more susceptible to rot. On the other hand, as the VPD increases, the plant needs to draw more water from its roots. In the case of cuttings, the plant may dry out and die. For this reason the ideal range for VPD in a greenhouse is from 0.45 kPa to 1.25 kPa, ideally sitting at around 0.85 kPa. As a general rule, most plants grow well at VPDs of between 0.8 and 0.95 kPa. In ecology, it is the difference between the actual water vapour pressure and the saturation water vapour pressure at a particular temperature. Unlike relative humidity, vapour-pressure defici ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ventricular Premature Depolarization
Ventricle may refer to: * Ventricle (heart), the pumping chambers of the heart * Ventricular system in the brain * Ventricle of the larynx The laryngeal ventricle, (also called the ventricle of the larynx, laryngeal sinus, or Morgagni's sinus) [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Virtual Private Database
A virtual private database or VPD masks data in a larger database so that only a subset of the data appears to exist, without actually segregating data into different tables, schemas or databases. A typical application is constraining sites, Departmentalization, departments, individuals, etc. to operate only on their own records and at the same time allowing more privileged users and operations (e.g. reports, data warehousing, etc.) to access on the whole table. The term is typical of the Oracle Database, Oracle DBMS, where the implementation is very general: tables can be associated to SQL functions, which return a predicate as a SQL expression. Whenever a query is executed, the relevant predicates for the involved tables are transparently collected and used to filter rows. Select (SQL), SELECT, Insert (SQL), INSERT, Update (SQL), UPDATE and Delete (SQL), DELETE can have different rules. External linksUsing Virtual Private Database to Implement Application Security Policies * ht ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vital Product Data
Vital Product Data (VPD) is a collection of configuration and informational data associated with a particular set of hardware or software. VPD stores information such as part numbers, serial numbers, and engineering change levels. Not all devices attached to a system will provide VPD, but it is often available from PCI and SCSI devices. Parallel ATA and USB devices also provide similar data, but do not refer to it as VPD. VPD data is typically burned onto EEPROMs associated with various hardware components, or can be queried through attached I2C buses. It is used by firmware (for example, OpenFirmware) to determine the nature of the system hardware, and to shield the operation of the firmware from minor changes and variations of hardware implementations within a given machine model number. AIX In IBM's AIX operating system, VPD also refers to a subset of database tables in the Object Data Manager (ODM) obtained from either the Customized VPD object class or platform specific are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
