This standard describes a PWB fabrication data quality rating system used by fabricators to evaluate the incoming data package integrity. Printed board designers can also use this system as an output quality check. The specification describes the file format, outlines the file sections, and indicates how data should be represented through objects. Objects can either be vendor independent generic objects defined in this document or vendor specific objects objects created by a vendor.
This document also includes error codes that should be used to report specific information about improperly constructed files. General guidelines for producing an SRFF file and vendor specific objects are also included. This standard outlines the requirements that an SRFF file must meet. It describes the file format, outlines the file sections, and indicates how data should be represented through objects. This standard also includes error codes that should be used to report specific information about improperly constructed files.
Factory Information Systems FIS form the nervous system of an enterprise, analysing data and delivering information to the machines and people who need to make information-based decisions. These systems provide a bi-directional flow of information between the factory floor and the rest of the enterprise.
Activities were comprised of three areas:. This standard establishes requirements and other considerations for the interchange of information between electronic manufacturing software equipment and factory information systems. Information may consist of attribute and parametric data, product data, process recipes, equipment monitoring and control, resource utilization and material consumption. This standard establishes requirements and other considerations for the interchange of information between shop floor electronic assembly equipment and factory information systems.
Information may consist of attribute and parametric data, product data, process recipes, equipment monitoring and control, resource utilization, and material consumption. This standard establishes requirements and other considerations for the interchange of information between shop floor electronic inspection and test equipment and factory information systems. Information may consist of attribute and parametric data, product data, fixture files, test vectors, equipment monitoring and control, resource utilization, image data, test and inspection program sets, test event data.
Product Data eXchange is a multi-part standard, represented by the IPC series of specifications. The Product Data eXchange standardization effort is focused on the problem of communicating product content information between Original Equipment Manufacturers, Electronics Manufacturing Services providers and component suppliers.
The standard is based on XML because this provides a simple yet powerful and flexible way to encode structured data into a format that is both human and machine-readable. This standard will enable dramatic efficiency improvements throughout the supply chain since partners will have a way to exchange product content and changes in a common language.
This standard defines an XML encoding scheme that enables a total product definition to be described at a level appropriate to facilitate supply chain interactions. The standard is designed to transfer technical information including bill of materials BOM , approved manufacturer list AML , as-built product configuration, and change Engineering, Manufacturing, Product information. This sectional standard provides an XML encoding schema to allow electronics manufacturing supply chain partners to exchange as-built product configuration and manufacturing process information.
The information represented by this standard may be used to continue to support products throughout their life cycles. This sectional standard provides an XML encoding scheme to allow electronics manufacturing supply chain partners to exchange sufficient product data to enable distributed manufacturing. The information represented by this standard includes bills of material BOM , approved manufacturer lists AML , approved supplier lists ASL , change history and engineering change orders, and a high-level description of the components listed on a bill of material.
Committees looked at the management and technical aspects of data transfer. Eventually, IPC undertook an ambitious project to provide the industry with a new layered neutral format. The work continues through the effort of the IPC consortium.
They have developed a complementary web page which may be reached through the following link: www. This standard continues to specify specifies the XML schema that represents the intelligent data file format used to describe printed board and printed board assembly products with details sufficient for tooling, manufacturing, assembly, and inspection requirements. The B revision enhances the methodology of specifying performance requirements as well as covering legal compliance with international environmental regulations.
This format may be used for transmitting information between a printed board designer and a manufacturing or assembly facility. The data is most useful when the manufacturing cycle includes computer-aided processes and numerical control machines.
This standard provides the information on administrative requirements used for the ordering, request for quote, or asking for changes to a particular printed board or printed board assembly. Since the requirements are important to every file in order to understand the file usage the XML schema is reused in every Business to Business transaction.
This standard calls out the details defined in the generic standard IPC that are required to accomplish these focused tasks. This standard provides the information on design characteristic features intended to define the basic principles used for indicating how to document the manufacturing requirements and any special symbology needed in the data description hierarchy. Since the requirements are important to every file in order to understand the file usage, the XML schema is reused in every Business to Business transaction.
This standard IPC provides the information on the manufacturing requirements used for fabricating printed boards. This standard determines the XML schema details, defined in the generic standard IPC and some of the sectional standards that are required to accomplish the focused tasks.
Intensifying production and increasing yield on limited arable land secure a sufficient food supply, and fertilizer plays a critical role in these goals. Intensifying production is increasingly essential to meet the challenge of future food demands.
However, this intensification must be done while also minimizing environmental impacts. The 4R Nutrient Stewardship Framework i. Plays an important role in flowering, pollen-tube growth, fruiting processes, N metabolism, and hormone activity. Although the essentiality of Cl has been established for many higher plants, its need for fruit crops has not yet been demonstrated, and its importance in citrus tree metabolism is unclear. The plant requirement for Cl is quite high as compared with other micronutrients, but its exact role in plant metabolism is still obscure.
Native Florida soils are low in B, and a deficiency of this element occasionally occurs in field conditions. In acidic soil, B is more water-soluble, very mobile in the sandy soil profiles, and readily leaches by rainfall or excessive irrigation. Boron deficiency may be aggravated by severe drought, excessive lime applications, or irrigation with alkaline water that can result in reduced B availability and uptake.
Boron deficiency is known as "hard fruit," because the fruit is hard and dry because of lumps in the rind caused by gum impregnations. The chief fruit symptoms include premature shedding of young fruits. Such fruit have brownish discolorations in the white portion of the rind albedo , which are described as gum pockets or impregnations of the tissue with gum and unusually thick albedo. Older fruit are undersized, lumpy, and misshapen with an unusually thick albedo containing gum deposits.
Seeds fail to develop, and gum deposits are common around the axis of the fruit Figure 1. Boron is relatively immobile in plants. The first visual symptoms of B deficiency are typically the death of the terminal growing point of the main stem.
Further symptoms include brittle and slightly thickened leaves, vein splitting, a tendency for the leaf blade to curl downward, and at times chlorosis Figure 2. Boron deficiency also tends to cause corking and enlargement of the upper surface of the main veins Figure 3. A premature shedding of leaves beginning at the treetop that soon renders the tree almost completely defoliated is also associated with this symptom.
Fruit symptoms are the most consistent and reliable tool to diagnose B deficiency. Boron deficiency is associated with citrus greening HLB disease.
Deficiency symptoms of Cl are not commonly observed in most crops growing in the field. Chlorine deficiency has not been seen on citrus. On other plant species, the most commonly described symptom of Cl deficiency is wilting of leaves, especially at the margins. As the deficiency progresses and becomes more severe, the leaves exhibit curling, bronzing, chlorosis, and necrosis. Leaf analysis standard for assessing Cl and B nutrient status of citrus trees in 4- to 6-month-old spring-cycle leaves from non-fruiting terminals.
Borax sodium borate is commonly used to treat B-deficient citrus. This source can be applied either to the foliage or to the soil. Because of its greater solubility, boric acid might be preferred more than borax for foliar spray application.
Foliar spray applications are safer and more efficient than soil applications. Foliar sprays may be applied throughout the dormant and post-bloom period but preferably during early flower development. Treating at this growth stage is important because B does not move readily from other parts of the tree to the buds.
Applying B at this time will also assist in flower initiation and pollen production, satisfy the needs for pollen tube growth, and enhance fruit set.
Hello, Sorry to hear about that! The chlorinated water spill could have very well contributed to your silver maple tree dying. It is hard to say if it was also the cause of the Autumn Blaze maple tree dying. It could very well have been a contributing factor. However, trees all over town are also showing the effects of a very dry winter, followed by warming spring temperatures in March, with a sharp decline in temperature single digits in early April.
I have noticed the trees hardest hit are evergreens like Arborvitae and Austrian Pine and younger, more vulnerable deciduous trees such as Ash and Maple.
0コメント