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This study implemented a hybrid net metering technology that will help limit the power consumed from the grid and maximize the usage of renewable energy, i.e., solar energy. The main objective of the study is to design a prototype on a small scale basis that controls and monitors the usage of power consumed by the load using a hybrid system. The development of hybrid system provided a significant...
This paper describes the humanitarian effort to help bring clean water and solar power to people in need along the Amazon River in Nauta, Peru. George Fox University partnered with JungleMaster Ministries to create a long-term development plan, beginning with a full prototype of the system at the NGO's house in Nauta. The engineering design, installation, and test of the system are discussed in detail,...
Gas Insulated Switchgear (GIS) has been in use in transmission system for more than 30 years with good reliability. However, in our case study of 631 CB-bays of GIS operating under tropical conditions, we observed failure rates over twice the value reported in the 3rd CIGRE's survey of 2007. Following this observation, it becomes practically important to develop a condition assessment model for GIS...
This paper proposes a distributed filtering scheme over sensor networks with topology switching and topology-dependent event-triggered transmission schemes. A new monitoring mechanism is introduced to identify the topology switching instants, and the system output is sampled by sensors when the network topology switches. Based on the time-varying sampled-outputs, a group of distributed topology-dependent...
A robust grid structure, which makes use of distributed renewable energy generation, should consist of grid sections, which are able to seamlessly switch between grid-connected and islanding mode of operation. This way, failures in the upper level part of the grid can be mitigated. This contribution discusses local and supervisory control strategies, and requirements for microgrids. A robust hierarchical...
Social exclusion and costly punishment have been regarded as potential measures to solve the conundrum of cooperation recently. In real life, what is pretty widespread is the combined use of multiple strategies. Here, we propose two different strategy switching rules, namely, peer switching and pool switching, to investigate the effect of conditional switching between punishment and exclusion on cooperation...
In the enterprise training, a digital telephone system with special functions is needed and there are no such products on the market. In this paper, a digital telephone system for training is designed based on CAN (Controller Area Network) bus and Ethernet. The SPC (Stored Program Controlled) telephone exchange is designed with distributed multi processors which communicate by CAN. In the system,...
Feasibility of the novel utilization of a pressure switch mechanism for re-calibrating drifted implanted pressure sensors in-situ is demonstrated. We have designed and characterized the pressure response of a system, which can quantify the offset of a sensor after it has been implanted. The benchtop device is constructed of a 25 pm thick titanium diaphragm with 10 mm working diameter. An optimization...
Software Defined Networking (SDN) enables a centralised entity - the controller - to monitor the network’s status by collecting traffic statistics such as packets, bytes, etc. Each statistic is associated with a forwarding table entry (FTE) in a switch whose structure and format is specified by the OpenFlow standard (de-facto SDN standard). For a flow with a FTE, its statistic is easily...
The Network on-Chip (NoC) is considered as an emerging technology for distributed embedded systems which is proposed as an alternative interconnection solution in Mutli-Processors System on-Chip (MPSoC). This paper proposes a graphical toll that allows researchers to generate and configure quickly their Network on-Chip in the hope to evaluate easily their contributions in no time. Unlike major existing...
This paper presents a design approach to an embedded monitoring system found in distributed renewable energy power systems. The grid connected distributed power system, delivers energy to the consumers located on the micro-grid, operating at distribution voltage levels, and also delivering the remaining surplus energy to the main distribution grid. The aim of this paper is to present the development...
Current approaches to Information-Centric Networking (ICN) facilitate the publication and retrieval of content in a network through a variety of discovery, caching and forwarding approaches, thus defining an equivalent of the data plane in the current Internet infrastructure. However, in contrast to the current Internet, ICN lacks a definition of the control plane for the management of the operation...
The paper describes how different parameters from vacuum circuit breaker influence the closing and opening time. Operational voltage, ambient temperature or hydraulic pressure can introduce delays in opening and closing the circuit breaker. These parameters are motorized through sensors that send all the data to a control unit. The control unit calculates the decision/(time) when to make controlled...
Bluetooth Low Energy (BLE) is a personal area wireless network technology that is of increasing importance for emerging Internet of Things (IoT) deployments. By design, BLE supports short-range, single-hop communication between a pair of BLE devices. As such, native BLE does not allow network-based policy control or in-network functions for service enhancement. These limitations are impediments to...
This paper introduces a dead-time optimization technique for a 2-level voltage source converter (VSC) using turn-off transition monitoring. Dead-time in a VSC impacts power quality, reliability, and efficiency. Silicon carbide (SiC) based VSCs are more sensitive to dead-time from increased reverse conduction losses and turn-off time variability with operating conditions and load characteristics. An...
Electric power supply installations must ensure a permanent power feed to the train traffic security installations. Any damage to the power feed components lead to delays in train traffic. This work proposed a modern computer-based diagnosis method based on diagnosis charts, both created by the authors. Running the hereby proposed software package and following its indications, the failure cause can...
In MapReduce, the parallel processing performance is often limited by only a few compute nodes that delay to complete given tasks. Although various techniques have been invented to handle such stragglers, these techniques mostly impose a burden on master node to monitor the progress of all the compute nodes, resulting in a new bottleneck as the number of compute nodes increases. As an alternative...
In this work, we seek to gain an understanding of the InfiniBand network processing limitations that might exist in gathering performance metric information from InfiniBand switches using our new LDMS ibfabric sampler. The limitations studied consist of delays in gathering InfiniBand metric information from a specific switch device due to the switch's processor response delays or RDMA contention for...
As demands on new software increase, new approaches are needed to help developers ensure Quality of Service (QoS) for their offered service. In this paper we present a QoS modeling approach that complements and extends the standard microservice and component-based software engineering tools by giving the software engineer information on what Non-Functional Requirements (NFRs) and quality constraints...
A trend has emerged toward the development of critical systems hosted on the Ethernet databus. Ethernet enjoys unprecedented standardization in commercial networks, and a vast network of engineers with training and experience. It is now commonly known that implementations of deterministic Ethernet for avionics networks known as ARINC 664 part 7 exist on several commercial airframes. In other platforms,...
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