ADAPTIVE E-LEARNING SYSTEM BASED ON STUDENT ACTIVITY SKILLS IN MOOLDE SYSTEM

Nowadays there are many views related to the online testing systems. The importance of acquisition of the final result is considered to be the main disadvantage in the classic test system where the learner chooses the correct answer from the suggested set of answers; this does not motivate a person to define the answer themselves or to create a logical chain of problem solutions. The integration of the intellectual processes into the existing training systems will prevent the drawbacks of the existing knowledge assessment systems and will make it possible to assess the learners’ ability to make logical decisions, to clarify the answers using examples and to evaluate the method of achieving the result. The article describes the algorithm for creating the intellectual, user adapted questions; this algorithm uses the model of the learner from the set of questions and by fulfilling the modified Dijkstra's algorithm chooses the questions that help the learner reach the result that is most appropriate to their competence level.

INTELLIGENT AND ADAPTIVE FUZZY CONTROL SYSTEM FOR ENERGY EFFICIENT HOMES

“Smart houses” have widely established their position as a research field during the last decade. Nowadays the technical solutions related to energy resource management are being rapidly developed and integrated into the daily lives of people. The energy resource management systems use sensor networks for receiving and processing information during the realia time. Smart house adaptive and intelligent solutions has advanced towards common environment, which can take care of the inhabitants’ well-being in numerous ways. This paper propose to use a context sensitive and proactive fuzzy control system for controlling the automation processes in smart house environment. The designed monitoring system has adaptive and intelligent options, and it can operate using real time information received from sensors. The system is designed to operate fully in the background and can be installed to any exiting working system. This paper describes a central heating boiler control system implemented using the fuzzy control system designed. Author concentrates on the basic operation of such systems and present findings from the design process and initial tests

Wireless sensor networks lifetime assessment model development

In the recent years low power computing systems have gained popularity.  Networks, which use low power computer systems and transmitted data by using wireless connection are called wireless sensor networks, which  main task is to get the information from sensors and transmission network. Nowadays, the most topical researches pertaining to wireless sensor networks are grounded on the  new optimization of structure of network transmission protocol, the routing optimization in transmission network, optimization of network structure, as a result of which the life circle of wireless network sensors is possible to increase. In the present article the methodology for determining the life circle of network is discussed. The approaches in detection of life circle pertaining to the important network nodes are described

Developing the Reconfiguration Method to Increase Life Expectancy of Dynamic Wireless Sensor Network in Container Terminal

Nowadays control and management logistics solutions that are used in terminals apply sensor based technologies to identify and localize containers in the yard. Nevertheless, because of the limits in the existing sensor technical specification, the position of nodes is still affected by some errors or sometimes it cannot be determined in real-time systems due to battery fall

Bezvadu sensoru tīkla dzīves ilguma novērtēšanas modeļa un metožu izstrāde un izpēte

Ikdienā palielinās dažādu ierīču skaits, kas, izmantojot datora tīklus, savā starpā nodrošina informācijas mijiedarbību. Pēdējā laikā palielinājies sistēmu skaits, kas neprasa cilvēka iejaukšanos sistēmas darbības procesā (Machine-to-Machine communication). Saskaņā ar “lietiskais internets” (Internet of things) koncepciju līdz 2019. gadam globālajā tīmeklī tiks saslēgti vairāk nekā daži triljoni telekomunikāciju ierīču [COL 2015], kuru lielāko daļu, saskaņā ar Starptautisko elektrosakaru savienības Y.2069 doto rekomendāciju [TER 2015], veidos “lietas” sistēmas. Lai telekomunikācijas ierīces varētu mijiedarboties savā starpā vai darboties, izpildot lietotāja instrukcijas, ierīcēs ir ieintegrēti dažādi sensoru mezgli, kas var, ne tikai nolasīt informāciju par apkārtējo vidi, bet komunicēt savā starpā, izmantojot tīkla protokolus. Pēdējā laikā lielu popularitāti atgūst mazjaudīgas skaitļošanas sistēmas. Šodienas tehnoloģijas ļauj samazināt esošās skaitļošanas sistēmas izmēru, radot nedārgu, mazjaudīgu autonomo sistēmu, kas dod iespēju izmantot gan fiziskos, gan bezvadu tīklus informācijas pārraidei. Lielāko popularitāti šī veida tehnoloģija guva informācijas saņemšanai no sensoriem un kontroles sistēmu jomā. Tīkli, kas izmanto mazjaudīgas skaitļošanas sistēmas un pārraida datus, izmantojot bezvadu savienojumu, ir saukti par bezvadu sensoru tīkliem, kuru galvenais uzdevums ir informācijas saņemšana no sensoriem un to pārraidīšana tīklā. Bezvadu sensoru tīkla pirmsākumi ir minēti 1999. gadā, kad pirmajā publikācijā [КОМ 2012] tika minēta iespēja izmantot mazjaudīgas sistēmas informācijas iegūšanai dabā. Attīstoties tehnoloģijai, tā ieguva plašu pielietojumu ne tikai vides parametru monitoringa jomā, bet arī medicīnā [STA 2005, ВАБ 2010, КУР 2011], apsardzes un drošības sistēmās [RAM 2012], kā arī izsekošanas uzdevumos [THE 2015]. Eksistē virkne nestandartu risinājumu, kuros dažreiz netipiskā veidā ir pielietots bezvadu sensoru tīkls – multimediju datu pārraidīšana [BAR 2004], inerces sensoru datu apstrāde izsekošanas sistēmās [ВАБ 2010], objektu kustības noteikšana un monitorings. Pēdējā laikā palielinās aplikāciju skaits, kas piedāvā izmantot mobilās ierīces kompleksas informācijas saņemšanai. Starp visvairāk attīstītākajām mobilo bezvadu sensoru tīkla aplikācijām var izcelt zemūdens monitoringa sistēmas [GOY 2009], objektu atrašanās vietas kontroles sistēmas telpā [THE 2015, IEE 2015] un pēdējā laikā plaši attīstītās personālās barometriskās sistēmas. Šodien aktuālākie bezvadu sensoru tīkla pētījumi ir balstīti uz jauno tīkla pārraides protokolu uzlabošanu [MIE 2012, TAR 2014], pārraides maršrutēšanu [КОМ 2012] un tīkla darbības struktūras veidošanu [КУР 2011], kas dod iespēju palielināt kopējo bezvadu sensoru tīkla dzīves ilgumu

Method for Balancing Energy through the Mobility of Node Agent in Mobile Sensor Network

In the recent years, low power computing systems have gained popularity. Networks, which use low power computer systems and transmit data by using wireless connection, are called wireless sensor networks. Nowadays, the most topical studies are aimed at grouping wireless sensor networks by the new optimisation of structure of network transmission protocol, the routing optimisation in a transmission network, optimisation of network structure, as a result of which it is possible to increase the life cycle of wireless network sensors. There are a number of methods that allow solving this problem. These include the choice of the capacity of individual battery, the deployment of the node density, the adjustment of power transmitter, the application of energy-efficient data transfer protocol, positioning of network nodes and other methods that are associated with the introduction of additional network costs. The present article discusses a new method for balancing energy through the mobility of network node intellectual agent, which provides the opportunity for reconfiguration of dynamic network or change of network topology

Method for Balancing Energy through the Mobility of Node Agent in Mobile Sensor Network

In the recent years, low power computing systems have gained popularity. Networks, which use low power computer systems and transmit data by using wireless connection, are called wireless sensor networks. Nowadays, the most topical studies are aimed at grouping wireless sensor networks by the new optimisation of structure of network transmission protocol, the routing optimisation in a transmission network, optimisation of network structure, as a result of which it is possible to increase the life cycle of wireless network sensors

Dynamic Coordinator Mobility Management Methodology for Balancing Energy Consumption in the Wireless Sensor Network

Nowadays, the most topical researches pertaining to wireless sensor networks are grounded on the new optimization of structure of network transmission protocol, the routing and network optimization, as a result of which the life circle of wireless network sensors is possible to increase. The nodes pertaining to information storage and processing are mainly equipped with an uninterrupted power supply, independent distribution network connectivity and high performance computing system. This means that the direction of the data is definitely known in the sensor network, the information from terminals is sent to the information storage and processing nodes. The capacity of data traffic near coordinator node is much higher than in the distant points, as a result, the existing elements close to processing nodes faster than others stop operating due to lack of electricity and, as a result, the network ceases its overall work. In present article a new method for balancing energy through the mobility of network coordinator node, which provides the opportunity for reconfiguration of dynamic network or change of network topology, is discussed

Some Aspects of Good Practice for Safe Use of Wi-Fi, Based on Experiments and Standards

The aim of the research is to study the effect of microwave Wi-Fi radiation on humans and plants. The paper investigates national standards for permissible exposure levels to microwave radiation, measures electric field intensity and justifies the point of view regarding the safe use of microwave technologies based on multiple plant cultivation experiments at different distances from a Wi-Fi router. The results demonstrate that the radiation of Wi-Fi routers significantly impairs the growth, development, yield and unexpected drought resistance of plants at short distances from the microwave source (up to 1 m to 2 m; –33 dBm to –43 dBm; >10 V/m). Slight effects are found up to about 4.5 m from a full-power home Wi-Fi router. As a result, suggestions are made for safe and balanced use of modern wireless technologies, which can complement occupational safety and health regulations