Iskanje po katalogu digitalne knjižnice

Opis: The invention refers to a secure locker box including a basic box (100) with a door enclosing a storage area, and a lock system for locking said door, said lock system including a processing unit (201), an electro mechanical door lock (202), and a wireless communication module (300). The processing unit (201) is adapted to receive a wakeup signal via said wireless communication module (300); send a request for unlocking said electro mechanical door lock (202) and opening said door; in response to receiving an unlock confirmation message, actuate said electro mechanical door lock (202) such that it opens said door; recognize closing of said door and locking said electro mechanical door lock (202) and in response sending a door closed and door lock locked confirmation message. A method for handling the secure locker box comprises receiving the confirmation message by a remote locker center (400) and writing a confirmation to a blockchain to ensure authenticity.
Ključne besede: user interfaces
Objavljeno v DKUM: 12.10.2023; Ogledov: 416; Prenosov: 6
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Opis: Computer methods are in the forefront of the procedures for analysis and design for geotechnical problems. Constitutive models that characterize the behavior of geologic materials and interfaces/joints play a vital role in the solutions obtained by using computer methods or any other solution procedure. The literature on both constitutive and computer models is wide; attention in this paper is devoted to the disturbed state concept (DSC) for constitutive modeling and the finite element method for computer solutions. The disturbed state concept, a unified and hierarchical approach, provides a unified framework for characterization of the behavior of geologic materials and interfaces/joints. Important factors such as elastic, plastic and creep responses, stress paths, volume change (contraction and dilation), disturbance (softening and damage or stiffening), thermal effects, partial saturation and liquefaction can be included in the same DSC framework. Because of its hierarchical nature, simplified models for specific applications can be derived from the DSC. It has been applied successfully for defining behavior of many geologic materials and interfaces/joints. Procedures for the determination of parameters for the DSC models based on laboratory tests have been developed. Various models from the DSC have been validated at the specimen level with respect to laboratory test data. They have been validated at the practical boundary value problem level by comparing observed behavior in the field and/or simulated problems in the laboratory with predictions using computer (finite element) procedures in which DSC has been implemented; these have been presented in various publications by Desai and coworkers, and are listed in the References. Three typical examples of such validations at the practical problem level are included in this paper. It is believed that the DSC can provide unified and powerful models for a wide range of geomechanical and other engineering materials, and interfaces/joints.
Ključne besede: constitutive modeling, disturbed state concept, DSC, geologic materials, interfaces/joints
Objavljeno v DKUM: 11.06.2018; Ogledov: 917; Prenosov: 91
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Opis: This paper gives an overview of a holistic project dealing with the consistent design of embedded control systems falling into the first level of safety integrity requirements (SIL l) (IEC, 1998). It shows how existing methods can be adapted and reasonably employed, whenever possible, without having to resort to new innovations. Firstly, the hardware issues are dealt with and extensively elaborated, particularly the peripheral interfaces with integrated processing capabilities. Secondly, the proven correct real-time operating system executing on its own dedicated processor is briefly addressed, and finally, programming issues including descriptions of the specific programming language, time bounded handling of exceptions, and how to deal with temporal overload.
Ključne besede: safety critical embedded systems, embedded systems, fault tolerant control systems, peripheral interfaces, exception handling, overload
Objavljeno v DKUM: 01.06.2012; Ogledov: 1693; Prenosov: 113
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