Reefer container monitoring system based on WSN and cloud technology

Reefer containers are the main transportation method for the import and export of food and medicine. For high-quality products is necessary to monitor the condition of the reefer containers in order to avoid affecting goods quality due to environmental variations. Monitoring the reefer containers which are used to transport fruits, vegetables, and dairy products is one of the examples. In this context appears the necessity to develop this work expressed by a distributed sensor system for monitoring reefer containers. With the support of the WSN (wireless sensor network) including a set of sensors, it is possible to obtain the information about the temperature, humidity and location data of the reefer container and upload those data to a cloud platform expressed in the case of the purposed system by The Things Network platform. Based on LEACH (Low Energy Adaptive Clustering Hierarchy) routing algorithm, the embedded software was developed to guarantee a well-balanced distribution of the energy load among WSN end-nodes. A web application and a mobile application has been developed to display the data coming from the WSN node. To check if the reefer container working in a good condition, an alarm software module has been developed to highlight abnormal data coming for the system. The routing algorithm has been simulated and the effectiveness of the algorithm is verified by simulation results. The effectiveness of the proposed system was experimentally tested, and several results are included in this dissertation.Os contentores frigoríficos são o principal método de transporte para a importação e exportação de alimentos e medicamentos. Em produtos de alta qualidade, é necessário monitorizar as condições dos contentores frigoríficos, a fim de evitar a perda da qualidade das merca dorias devido a variações térmicas. Por exemplo, monitorarizando os contentores frigoríficos usados para transportar frutas, vegetais e laticínios. Neste contexto, aparece a necessidade do desenvolvimento deste projeto descrito por um sistema de sensores distribuídos para monitorizar contentores frigoríficos. Com o suporte da rede de sensores sem fios, incluindo um conjunto de sensores, é possível obter informações sobre os dados da temperatura, humidade e localização do contentor refrigerado e fazer uplo ad desses dados numa plataforma em cloud expressa no caso do sistema proposto por plataforma de rede de coisas. Com base no algoritmo de roteamento LEACH, o software incorporado foi desenvolvido para garantir uma distribuição equilibrada da carga de energi a entre os nós de WSN. Uma aplicação Web e uma aplicação móvel foram desenvolvidas para mostrar os dados provenientes do nó WSN. Para verificar a qualidade dos dados, um módulo de software de alarme foi também desenvolvido para destacar dados anormais que chegam ao sistema. O algoritmo de roteamento foi simulado e a eficiência do algoritmo é verificada pelos resultados da simulação. A eficiência do sistema proposto foi testada experimentalmente e os vários resultados estão incluídos nesta dissertação

P-91: Parametric Evaluation of Computer Displays for Optimized Display Data Transmission

Abstrac

Accelerated Wear Reactor Testing

Carbon dioxide accounts for a large amount of global greenhouse gases released into the environment. Because plastic degradation emits carbon dioxide, there has been interest to investigate how much carbon dioxide various plastics generate as they degrade. We have been tasked to create a dehumidifier and carbon dioxide sensor assembly for an accelerated wear testing apparatus that degrades plastic. Several products and literature currently exist that share similarity with our assembly but have not been manufactured to achieve the same combination of measurements we are expecting of our accelerated wear testing device. The following report shall introduce these products and literatures, highlight customer requirements, detail the design process, and discuss project management for our accelerated wear testing apparatus. It has been shown with 95% confidence that our sensors output accurate results for CO2, relative humidity, and temperature for the range of values that are expected to be encountered during the course of accelerated age testing of plastics inside a bioreactor. Additionally, it has been confirmed that the dehumidifying chamber can be used to dry a gas sample to a level that is appropriate for the sensors being used within this device. Next steps for this device include, interfacing with a bioreactor, automation of sampling, a continuous method of drying the desiccant within the dehumidification chamber, along with machined parts to replace rapid prototyped components

Wirelessly Connected Sensor Acquisition System for Remote Nursing Applications

Taking advantage of the equipment used in the Remote Nursing project, nurses can watch patients\u27 status remotely. The equipment, which is installed in the patient\u27s ward or home, can monitor them and their environment. This project demonstrates this using a microcontroller system that interfaces to a video camera and temperature and humidity sensors in the room. Also a servomotor is installed to control the position of the camera. The microcontroller communicates wirelessly with a PC. This project is focused on hardware rather than software. It is to test the video camera and sensors being used over the microcontroller through the wireless module. The sensors are controlled by drivers and graphical interfaces that come with the hardware or are freely available online

DeepLight: Robust and unobtrusive real-time screen-camera communication for real-world displays

National Research Foundation (NRF) Singapore under NRF Investigatorship gran

Design and implementation of the SBX1: a smart environment chamber for biological research and discovery

2021 Summer.Includes bibliographical references.Modern biomedical laboratories make significant use of environmentally controlled chambers for incubation and examination of live cell samples. They require precise control over temperature, humidity, and gas concentration to mimic natural conditions for cell survival and growth. Many incubators and live cell imaging systems exist as commercial products; however, they are prohibitively expensive, costing tens or hundreds of thousands of dollars depending on capabilities of the system. This thesis presents the electrical, optical, mechanical, and software design of the SBX1Smart Environment Chamber. This device aims to fulfill the needs of most users at a lower cost than current commercial offerings, providing an opportunity for less funded labs to pursue biomedical research and development. The chamber provides temperature, humidity, and gas concentration controls, an internal microscope with an automated stage, and an integrated ARM microcomputer to with a graphical user interface for control and monitoring of the system. A patent has been filed for the SBX1; application no. US 2020/0324289 A1

New interaction models for 360º video

Esta dissertação tem como principal objectivo a incorporação de um mecanismo de buffering num sistema de multimídia, capaz de oferecer experiências multivista adaptáveis. A incorporação deste mecanismo vem provocar melhorias na qualidade de serviço e na qualidade de experiência. O sistema recorre ao protocolo MPEG-DASH e a uma câmara convencional para detecção dos movimentos da cabeça do utilizador. O sistema incorpora ainda um mecanismo de adaptação automática da qualidade, ajustável às condições da rede. O mecanismo desenvolvido é composto por um proxy e tem o objectivo de minimizar o atraso existente na transição de vistas. O proxy será capaz de enviar três vistas em simultâneo, duas em baixa qualidade, enquanto a vista principal será enviada e apresenta ao utilizador em alta qualidade.Sempre que existe um novo pedido por parte do utilizador, o mecanismo irá comutar entre as vistas enviadas até receber a resposta por parte do servidor. Deste modo, esta dissertação pretende identificar as dificuldades que se colocam relativamente à disponibilização e transmissão eficiente deste tipo de conteúdos, assim como os compromissos necessários ao nível da qualidade de experiência do utilizador.Today, the fast technological evolution and the significant increase in the demand for multimedia content has boosted the development of the transmission mechanisms used for this purpose.This development had repercussions in several areas, such as the immersive experiences that include the 360º contents. Whether through live streaming or using on demand services, the quality of service and experience have become two points whose development has assumed high importance. The capture and reproduction of 360º content allows transmitting an immersive view of reality at a given moment. With this approach, the industry intends to provide a product with better audiovisual quality, more comfortable for the user and that allows a better interaction with the same. An example of this is the choice of the view that most appeals to us in a given event (for example, football matches or concerts). This dissertation has as main objective the incorporation of a buffering mechanism in a multimedia system, able to offer adaptive multivista experiments. The system uses the MPEG-DASH protocol for efficient use of network resources and a conventional camera for detecting the movements of the user's head, selecting the points of view that one wishes to visualize in real time. The system also incorporates an automatic quality adjustment mechanism, adjustable to the network conditions. The buffering mechanism is intended to increase the quality of experience and the quality of service, minimizing the delay in the transition of views. The mechanism will consist of a proxy capable of sending three views simultaneously. Of these views, two will be sent in low quality, while the main view will be sent and presented to the user in high quality. Whenever there is a new request from the user, the mechanism will switch between sent views until it receives the response from the server. Based on these assumptions, the dissertation intends to identify the challenges that are posed regarding the availability and efficient transmission of 360º content, as well as the necessary commitments regarding the quality of user experience. This last point is particularly significant, taking into account the network requirements and the volume of data presented by the transmissions of this type of content

Research Reports: 1984 NASA/ASEE Summer Faculty Fellowship Program

A NASA/ASEE Summer Faulty Fellowship Program was conducted at the Marshall Space Flight Center (MSFC). The basic objectives of the programs are: (1) to further the professional knowledge of qualified engineering and science faculty members; (2) to stimulate an exchange of ideas between participants and NASA; (3) to enrich and refresh the research and teaching activities of the participants' institutions; and (4) to contribute to the research objectives of the NASA Centers. The Faculty Fellows spent ten weeks at MSFC engaged in a research project compatible with their interests and background and worked in collaboration with a NASA/MSFC colleague. This document is a compilation of Fellows' reports on their research during the summer of 1984. Topics covered include: (1) data base management; (2) computational fluid dynamics; (3) space debris; (4) X-ray gratings; (5) atomic oxygen exposure; (6) protective coatings for SSME; (7) cryogenics; (8) thermal analysis measurements; (9) solar wind modelling; and (10) binary systems

A hybrid and cross-protocol architecture with semantics and syntax awareness to improve intrusion detection efficiency in Voice over IP environments

Includes abstract.Includes bibliographical references (leaves 134-140).Voice and data have been traditionally carried on different types of networks based on different technologies, namely, circuit switching and packet switching respectively. Convergence in networks enables carrying voice, video, and other data on the same packet-switched infrastructure, and provides various services related to these kinds of data in a unified way. Voice over Internet Protocol (VoIP) stands out as the standard that benefits from convergence by carrying voice calls over the packet-switched infrastructure of the Internet. Although sharing the same physical infrastructure with data networks makes convergence attractive in terms of cost and management, it also makes VoIP environments inherit all the security weaknesses of Internet Protocol (IP). In addition, VoIP networks come with their own set of security concerns. Voice traffic on converged networks is packet-switched and vulnerable to interception with the same techniques used to sniff other traffic on a Local Area Network (LAN) or Wide Area Network (WAN). Denial of Service attacks (DoS) are among the most critical threats to VoIP due to the disruption of service and loss of revenue they cause. VoIP systems are supposed to provide the same level of security provided by traditional Public Switched Telephone Networks (PSTNs), although more functionality and intelligence are distributed to the endpoints, and more protocols are involved to provide better service. A new design taking into consideration all the above factors with better techniques in Intrusion Detection are therefore needed. This thesis describes the design and implementation of a host-based Intrusion Detection System (IDS) that targets VoIP environments. Our intrusion detection system combines two types of modules for better detection capabilities, namely, a specification-based and a signaturebased module. Our specification-based module takes the specifications of VoIP applications and protocols as the detection baseline. Any deviation from the protocol’s proper behavior described by its specifications is considered anomaly. The Communicating Extended Finite State Machines model (CEFSMs) is used to trace the behavior of the protocols involved in VoIP, and to help exchange detection results among protocols in a stateful and cross-protocol manner. The signature-based module is built in part upon State Transition Analysis Techniques which are used to model and detect computer penetrations. Both detection modules allow for protocol-syntax and protocol-semantics awareness. Our intrusion detection uses the aforementioned techniques to cover the threats propagated via low-level protocols such as IP, ICMP, UDP, and TCP