Kompiuterizuoto būsto šiluminio balanso modeliavimas naudojant MATLAB

Labai svarbu, kad šildymo sistema ne tik garantuotų komfortą, bet ir būtų ekonomiška. Šildymo sistemos ekonomiškumas priklauso ne tik nuo jos valdymo algoritmų, bet ir nuo radiatorių galingumo paskirstymo patalpose. Pasiūlytas pastato šiluminio balanso modelis, realizuotas naudojant MATLAB įrankį „Simulink“, leidžia analizuoti procesus šildymo sistemoje ir optimaliai paskirstyti šildymo elementų galingumą atskirose patalpose. Pateikiami modeliavimo rezultatai ir išvados.Smart House Heat Balance Modeling Using MATLABAntanas Mikuckas, Irena Mikuckienė, Egidijus Kazanavičius, Jonas Čeponis SummaryThe purpose of heating system is to create the best environment possible and to minimize energy consumption. Energy consumption in heating system depends not only on control algorithms of heating system, but also on power of heating units’ distribution. Heat balance model was developed using MATLAB. This model allows fi nding out optimal distribution of heating elements power. The results for residential house are shown. The heat consumption for a specifi ed time period was calculated.ight: 18px;">&nbsp

Pastato termofizinių savybių modeliavimas naudojant „Simulink“

Šildant pastatus ne tik užtikrinamas komfortas, bet ir energetiškai teršiama aplinka, o gaminant kurą teršiama atmosfera. Šildymui mažiau sunaudojant energijos sutaupoma lėšų ir mažinama tarša. Pasiūlytas pastato šiluminio balanso modelis leidžia įvertinti įvairių veiksnių (atitvarų šiluminė varža, oro infiltracijos greitis, katilo galingumas, šildymo sistemos valdymo algoritmai ir t. t.) įtaką pastato šildymui sunaudojamos energijos kiekiui. Pateikiami modeliavimo rezultatai.Modeling thermo-physical properties of building using “Simulik”Antanas Mikuckas, Irena Mikuckienė, Egidijus Kazanavičius, Jonas Čeponis SummaryVarious models are used to study heat dynamics in buildings for evaluating heating energy consumption. This paper deals with model allowing to simulate thermal transients depending on the geometrical characteristics and thermo-physical properties of building components (exterior walls, internal partitions ceilings, floors and windows), external temperature variations and properties of heating system. The results for residential house are shown. The heat consumption for a specified time period was calculated. The heating energy conservation methods are analyzed and compared

Daugiaplatformės programinės ir sisteminės įrangos kūrimo priemonės koncepcija

Straipsnyje pateikta daugiaplatformės programinės įrangos kūrimo ir integravimo į įterptinės sistemos sisteminę įrangą (ang. fi rmware), kūrimo priemonės koncepcija, kurios veikimo pagrindą sudaro generuojančios sistemos. Modeliavimas atliekamas pagal MDA architektūrą, naudojant UML ir jos pagrindu sukurtą SysML modeliavimo kalbą, kuri leidžia daug formaliau aprašyti modeliuojamą sistemą ir jos dinamiką. Programinės įrangos kūrimas iliustruotas balso perdavimo IP tinklais programos pavyzdžiu.Conception of a Multi-Platform System Software and Firmware Development ToolMindaugas Vidmantas, Egidijus Kazanavičius SummaryThis article proposes a new conception of the multi-platform software and fi rmware development tool. This conception is aimed at improving the quality as well as increasing the development productivity in multi-platform systems. The Model Driven Architecture (MDA) offers a more effi cient software engineering process by raising the level of abstraction. A semi-formal Unifi ed Modeling Language (UML) and its extension Systems Modeling Language (SysML) can bring software developers to a more formal model description, especially for real-time applications, enhancing possibilities to model the dynamics of the software model and decomposition of the physical architecture. The illustration of this tool conception is based on creation of a VoIP (Voice over IP) system

Combining Cryptography with EEG Biometrics

Cryptographic frameworks depend on key sharing for ensuring security of data. While the keys in cryptographic frameworks must be correctly reproducible and not unequivocally connected to the identity of a user, in biometric frameworks this is different. Joining cryptography techniques with biometrics can solve these issues. We present a biometric authentication method based on the discrete logarithm problem and Bose-Chaudhuri-Hocquenghem (BCH) codes, perform its security analysis, and demonstrate its security characteristics. We evaluate a biometric cryptosystem using our own dataset of electroencephalography (EEG) data collected from 42 subjects. The experimental results show that the described biometric user authentication system is effective, achieving an Equal Error Rate (ERR) of 0.024

Smart irrigation system for environmental sustainability in Africa: An Internet of Everything (IoE) approach

Water and food are two of the most important commodities in the world, which makes agriculture crucial to mankind as it utilizes water (irrigation) to provide us with food. Climate change and a rapid increase in population have put a lot of pressure on agriculture which has a snowball effect on the earth’s water resource, which has been proven to be crucial for sustainable development. The need to do away with fossil fuel in powering irrigation systems cannot be over emphasized due to climate change. Smart Irrigation systems powered by renewable energy sources (RES) have been proven to substantially improve crop yield and the profitability of agriculture. Here we show how the control and monitoring of a solar powered smart irrigation system can be achieved using sensors and environmental data from an Internet of Everything (IoE). The collected data is used to predict environment conditions using the Radial Basis Function Network (RBFN). The predicted values of water level, weather forecast, humidity, temperature and irrigation data are used to control the irrigation system. A web platform was developed for monitoring and controlling the system remotely

Older adults–potential users of technologies

Background and objective: The successful adoption of technology is becoming increasingly important to functional independence and successful ageing in place. A better understanding of technology usage amongst older people may help to direct future interventions aimed at improving their healthcare. We aimed to obtain the first data regarding technology use, including gerontechnologies, represented by fall detectors, from older adults in Lithuania. Material and methods: The research was carried out in the framework of the project Smart Gerontechnology for Healthy Ageing, which involved assessing the use of technologies and the readiness to use gerontechnologies, as represented by fall detectors. A total of 375 individuals that were more than 60 years of age were enrolled in the study. The self-reporting questionnaires were completed by geriatric in-patients, hospitalized in the geriatric department, and also by community-dwelling older adults. Results: Geriatric in-patients’ use of computers and the internet was associated with age (every year of age decreased the probability of computer and internet use by 0.9-times) and a positive attitude towards new technologies—this predictor increased the use of a computer by six-times in comparison with people who did not have such an attitude. Sex and education had no influence on computer use for geriatric in-patients. For community-dwelling older adults, the use of computers and internet was associated with age, education (a university education increased the use of computers and the internet by four times), and a positive attitude towards technologies. Conclusions: Lithuanian older women in the study used computers, the internet, and cell phones equally with men. Increasing age was a strong negative predictor of technology use. A positive attitude to new technologies was a strong positive predictor of technology use. [...]