This standard applies to external and internal audiovisual communication of passenger information, destination/trip information, and announcements related to safety and emergencies, as well as advertisement/community information for rail transit vehicles. It specifies the physical, logical, and electrical interfaces of the passenger information system for rail transit vehicle systems and subsystems. This includes the following equipment: passenger information signs,public address system,… read more passenger/crew call intercom system, internal display system, and radio system interface with the public address system. read less

定价： 143元 / 折扣价： 122 元

This standard specifies baseline environmental conditions under which transit rail car electronic equipment shall both operate and/or survive. Special requirements anticipated for applications that have environmental conditions outside these baseline conditions are neither covered nor intended herein. Environmental conditions include: temperature, humidity, atmospheric pressure, water, corrosive elements, and vibration/shock. These conditions depend upon equipment location such as under car,… read more interior, truck mounted, and carbody mounted read less

定价： 55元 / 折扣价： 47 元

定价： 56元 / 折扣价： 48 元

The scope of this standard focuses on delay and power calculation for integrated circuit design with support for modeling logical behavior and signal integrity.

定价： 363元 / 折扣价： 309 元

This standard covers on-board devices/systems, with crashworthy memory, that record data to support accident/incident analysis for rail transit vehicles. The requirements of this standard are limited to event recorder functions and interfaces, exclude the data transmission method(s), and are independent of the hardware and/or software employed for other vehicle systems. Functions, parameters, signals, systems, and subsystems that shall be captured are identified. Diagnostic features and self-… read more test options are described. read less

定价： 81元 / 折扣价： 69 元

This document provides a set of standard verification tasks for processor-based equipment used in safety critical applications on rail and transit systems. The scope of the standard shall encompass and be limited to processes which verify the level of safety achieved in the implementation of safety critical functions which are required to be fail-safe. It does not address quality assurance or validation processes which also affect the level of overall system safety achieved.

定价： 133元 / 折扣价： 114 元

This Standard specifies a high level architecture for information technology-supported learning, education, and training systems that describes the high-level system design and the components of these systems. This Standard covers a wide range of systems, commonly known as learning technology, education and training technology, computer-based training, computer assisted instruction, intelligent tutoring, etc.. This Standard is pedagogically neutral, content-neutral, culturally neutral,… read more implementation-neutral, and platform-neutral. This Standard (1) provides a framework for understanding existing and future systems, (2) promotes interoperability and portability by identifying abstract, high level system interfaces, and (3) incorporates a technical horizon (applicability) of at least 5-10 years while remaining adaptable to new technologies and learning technology systems. This Standard will facilitate the development of configuration guidelines (e.g., profiles) for general learning technology systems. This Standard is neither prescriptive nor exclusive. read less

定价： 110元 / 折扣价： 94 元

This standard describes an ECMAScript application programming interface (API) for content-to-runtime-services communication. This standard is based on an API defined in the "CMI Guidelines for Interoperability," version 3.4, defined by the Aviation Industry CBT Committee (AICC). It defines common API services in the ECMAScript language that enables the communication of information between learning-related content, and a runtime service (RTS) used to support learning management. This standard… read more does not address the data structures that may be transmitted, data security, or communication between an RTS and a related management system. read less

定价： 63元 / 折扣价： 54 元

This standard specifies a conceptual data schema that defines the structure of a metadata instance for a learning object. For this standard, a learning object is defined as any entity, digital or non-digital, that is used for learning, education or training. For this standard, a metadata instance for a learning object describes relevant characteristics of the learning object to which it applies. Such characteristics can be regrouped in general, life cycle, meta-metadata, educational, technical,… read more educational, rights, relation, annotation, and classification categories. The conceptual data schema specified in this standard will allow for linguistic diversity of learning objects and the metadata instances that describe them. The conceptual data schema defined in this standard specifies the data elements of which a metadata instance for a learning object is composed. This standard will be referenced by other standards that will define the implementation descriptions of the data schema so that a metadata instance for a learning object can be used by a learning technology system to manage, locate, evaluate, or exchange learning objects. This standard does not define how a learning technology system will represent or use a metadata instance for a learning object. read less

定价： 74元 / 折扣价： 63 元

This standard defines World Wide Web Consortium (W3C) Extensible Markup Language (XML) structure and constraints on the contents of XML 1.1 documents that can be used to represent learning object metadata (LOM) instances as defined in IEEE Std 1484.12.1(TM)-2002.1 This standard defines the structure and constraints of the XML 1.1 documents in W3C XML Schema definition language. An implementation that conforms to this standard shall conform to IEEE Std 1484.12.1-2002.

定价： 84元 / 折扣价： 72 元

This recommended practice specifies how the elements and attributes defined in the IMS Content Packaging Information Model (CP) Version 1.2 relate to the components of the conceptual model for resource aggregation defined in IEEE Std 1484.13.1™-2012.

定价： 65元 / 折扣价： 56 元

IEEE Std 1484.2™-2024 provides recommended practices for learning and employment records (LERs) related to ecosystems utilizing the following components: a) LER registry b) LER awarder c) LER transmitter d) LER digital wallets e) LER talent marketplaces A learning and employment record (LER) provides information about an individual’s learning experiences, credentials, and qualifications, including employment history and jobs data, that have been issued to the individual such that this LER… read more holder (or their legal guardian or authorized agent) can control how the information is presented and shared within the LER ecosystem. An LER is stored in an LER digital wallet, or equivalent, having features that allow LER holders to share all or part of their records with others. LERs can be created by the individual or by a third party known as an LER awarder. In addition, some LERs can be digitally verified with the LER transmitter. Participants in this LER ecosystem framework include the entities that award and transmit the LER, those that support validation of the LER, the subject or guardian as the LER holder, as well as the organizations of the LER talent marketplaces that can access LERs presented by LER holders. This standard is supported by non-normative, informative resources hosted on the IEEE SA Open Platform in an open source repository maintained at https://ler.ieee-saopen.org/. read less

定价： 56元 / 折扣价： 48 元

Research, compile and consolidate information leading to the publication of a standard for a template for message sets for intelligent transportation systems (ITS). The template will provide an overall syntax and structure for ITS message sets.

定价： 141元 / 折扣价： 120 元

This Test Procedure, which supersedes the previous issue, Standards on Antennas--Methods of Testing 48 I R E 2S2, is concerned with measurements of the properties which characterize antennas. In Section 1.2, symbols and units to be used in this test Procedure are defined. The effect of the environment on the antenna and its characteristics is discussed in Section 1.3, and certain precautions to be taken during the measurements are suggested. In Section 1.4, the usefulness of the reciprocity theorem in antenna measurements is cited, along with examples of situations in which this theorem does not apply.

定价： 55元 / 折扣价： 47 元

This guide discusses operational parameters that may be observed by battery monitoring equipment used in stationary applications, and the relative value of such observations. Although this guide does not give a listing of commercially available systems, it does provide a means for establishing specifications for the desired parameters to be monitored.

定价： 95元 / 折扣价： 81 元