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This work deals with the idea of multimedia mobile application development. The theoretical part describes the main division of app categories, history of development, most common operation systems and architecture. It deals with psychological factors used in the creation of applications in order to shape the user's behavior and build his habits. The practical part is related to the issue of programming multimedial notepad for smartphones using component-based framework for building scalable applications. The resulting application allows users to record multimedial notes with a time record, share notes on social networks and display basic statistics over stored data. The mobile app uses Angular to develop the application and Firebase Realtime Database for storing data. In the conclusion this work analyzes functionality of an application and recommends implementation of functions for future development.

The validation and accuracy of internet protocol version 6 (IPv6) performance using jumbo frames is still not perfect, due to peer-to-peer connections testing within the same operating system and between operating systems. Therefore, inaccurate data test results. To mitigated, testing with a wider platform is recommended, a medium-scale network connection is proposed such as metropolitan area networks. In this works, a connection between computer devices connected by three proxy routers are made, with different IPv6 segments on each port. Then each computer device sends traffic data to each other using a traffic-generator application. The first test through three routers without tunnel connection is carried out as the first scenario to compare performance with tunnel-based testing. Three parameters have been used in this test, such as maximum transfer unit (MTU) 1500 bytes, MTU 400 bytes and MTU 9000 bytes. The results of the tests conducted show that the use of jumbo frames using a proxy is less effective, even though it produces a larger throughput when using the MTU 4000, but there is fragmentation in the packet passing through the proxy because the packet passing through the proxy is split into 1500 byte sizes.

Dynamic security assessment is widely used in dispatching operation systems, and calculation speed is one of its most important performance indices. In this study, an improved k-nearest neighbour (k-NN) method is proposed aiming to predict the stability indicators of power system, for example, critical clearing time. The method is much faster than the simulation and suitable for online analysis. Firstly, a simulation sample database is constructed based on historical online data and a logistic regression model with least absolute shrinkage and selection operator is trained to pick the stability features, which are chosen from static quantities like running state and active power of electric elements. While a new operation mode needs to be evaluated, a weighted k-NN is implemented to obtain the most familiar samples in the database using the chosen features; the final result will be determined comprehensively by the familiar samples. The validity of the proposed method is verified by simulation using online data of State Grid Corp of China and different key faults. It is proved that the method meets the requirements for speed and accuracy of online analysis system.

Dynamic security assessment (DSA) is widely used in dispatching operation systems, and the small signal stability is one of the DSA's most time-consuming calculation methods. In this article, a fast method is proposed aiming to predict the small signal stability metrics of designated oscillation mode, for example frequency or damping ratio. The method is much faster than the simulation and suitable for the online application. First, the t-distributed stochastic neighbour embedding (t-SNE) algorithm is performed which can create a mapping from the power system components to 2D coordinate depending on the electrical distance of each other; then, it will be transformed into a grid structure by meshing operation, on which the convolutional neural network (CNN) model can be run properly. Finally, with a large amount of simulation samples, the CNN model can be well trained using static quantities as its input and small signal stability metrics as its prediction target. While a new operation mode needs to be evaluated, the result will be obtained by CNN directly. The validity of proposed method is verified using online data of State Grid Corp of China. It is proved that the method meets the requirements for speed and accuracy of online analysis system.

Many researches were done to find creative techniques, for Android platform, that can detect malware in easy and reliable manner. The aim is not only the effectiveness but to have less processing time, and less resources consumption. This research provide a solution for a part of this problem by finding an easy and fast way to analyze static application code and to generate its figure-print or signature to be used later in similarity measurement with available database of malwares signatures. We proposed a new method depends on SimHash algorithm which generate signature for reverse code from .apk android package kit. We compare the proposed algorithm with an existing Androguard tool, which also analyze static code and generate signatures using reverse engineering. We found that the proposed method saves 70% of time with similar results and time distribution behavior in comparison with Androguard.

Irrigation systems should be a relevant agent to give solutions to the increasing demand of food, and to the development, sustainability and productivity of the agricultural sector. The design, managing, and operation of irrigation systems are crucial factors to achieve an efficient use of the water resources and the success in the production of crops and orchards. The aim of this paper is to analyze knowledge and investigations that enable to identify the principal criteria and processes that allow improving the design and managing of the irrigation systems, based on the basic concept that they facilitate to develop agriculture more efficient and sustainable. The design and managing of irrigation systems must have its base in criteria that are relevant, which implies to take into account agronomic, soil, hydraulic, economic, energetic, and environmental factors. The optimal design and managing of irrigation systems at farm level is a factor of the first importance for a rational use of water, economic development of the agriculture and its environmental sustainability.Los sistemas de riego deberían ser un agente relevante para dar soluciones a la demanda creciente de alimentos, y el desarrollo, sustentabilidad y productividad del sector agrícola. El diseño, manejo, y operación de los sistemas de riego son factores cruciales para lograr un uso eficiente de los recursos hídricos y el éxito en la producción de cultivos y frutales. El objetivo de este artículo fue analizar conocimientos e investigaciones que permitan identificar los principales criterios y procesos para mejorar el diseño y manejo de los sistemas de riego, basados en el concepto básico de desarrollar una agricultura más eficiente y sostenible. El diseño y manejo de los sistemas de riego deben tener su base en criterios que sean relevantes, lo que implica considerar aspectos agronómicos, de suelo, hidráulicos, económicos, energéticos, y ambientales. El diseño y manejo óptimo de los sistemas de riego a nivel predial es un factor de primera importancia para un uso racional del agua, el desarrollo económico de la agricultura y su sustentabilidad ambiental.

This article is supported by the grant no. 402/08/1046 „Models of firms with mobile oriented architecture” of the Czech Science Foundation. The substance of the project „Models of firms with mobile oriented architecture”is creation and research of the comprehensive system of models of firms having mobile oriented architecture. This system includes mainly process models and service oriented models (SOA). The integral part of the solution will be also the proposal of transformation process leading towards mobile oriented architecture. The starting point of research will be analysis of present use of mobile attitudes in the area of m-commerce and m-business in the Czech republic and in the world from the point of view of ways, scopes, and effectiveness of using currently available mobile technologies as well as trends in this area. The models will describe possibility of using of mobile solution on different levels of management, for the support of business processes, processes of IT management and processes of providing IT services. Accessible mobile device offer already basic environment for creation mobile application, despi- te of the number of users and companies use only basic provided ICT services like voice, SMS sending, eventually access to e-mail boxes or connection to the internet. In the Czech market, there exist only very few companies, which are using mobile device for access to their company IT system. A lot of these companies has supranational character and their SW solutions are imported and adapted for Czech market. It is possible to claim, mobile technologies forerun the develope- ment in area of implementation of new managing methods and process architectures with mobility elements. In consequence of implementing these technologies to the firm, there is comming ne- cessary rebuilding of number of business processes.

Irrigation systems should be a relevant agent to give solutions to the increasing demand of food, and to the development, sustainability and productivity of the agricultural sector. The design, managing, and operation of irrigation systems are crucial factors to achieve an efficient use of the water resources and the success in the production of crops and orchards. The aim of this paper is to analyze knowledge and investigations that enable to identify the principal criteria and processes that allow improving the design and managing of the irrigation systems, based on the basic concept that they facilitate to develop agriculture more efficient and sustainable. The design and managing of irrigation systems must have its base in criteria that are relevant, which implies to take into account agronomic, soil, hydraulic, economic, energetic, and environmental factors. The optimal design and managing of irrigation systems at farm level is a factor of the first importance for a rational use of water, economic development of the agriculture and its environmental sustainability. Los sistemas de riego deberían ser un agente relevante para dar soluciones a la demanda creciente de alimentos, y el desarrollo, sustentabilidad y productividad del sector agrícola. El diseño, manejo, y operación de los sistemas de riego son factores cruciales para lograr un uso eficiente de los recursos hídricos y el éxito en la producción de cultivos y frutales. El objetivo de este artículo fue analizar conocimientos e investigaciones que permitan identificar los principales criterios y procesos para mejorar el diseño y manejo de los sistemas de riego, basados en el concepto básico de desarrollar una agricultura más eficiente y sostenible. El diseño y manejo de los sistemas de riego deben tener su base en criterios que sean relevantes, lo que implica considerar aspectos agronómicos, de suelo, hidráulicos, económicos, energéticos, y ambientales. El diseño y manejo óptimo de los sistemas de riego a nivel predial es un factor de primera importancia para un uso racional del agua, el desarrollo económico de la agricultura y su sustentabilidad ambiental.

This PhD researches a global methodology enabling to improve the dependability and security level against transient logic faults (natural or provoked) appearing inside a hardware/software integrated system, like for instance a smart card. Results can be applied to all systems built around a synthesisable microprocessor core and a set of specialised peripherals. The protection methods operate simultaneously and in complementary manner on hardware, application software and interface layers (most noticeably, the operating system). High level modifications have been favoured for their advantages in terms of generality, configurability, portability and perpetuity. The proposed approach aims at achieving a good trade-off between robustness and overheads, from both hardware and performance point of views. It is applied on a significant system example, representative of an embedded monoprocessor system, based on the 32-bit Leon2 processor and the eCos operating system. The processor has been modified to improve his ability to react against perturbations, by modifying its cache memories, their controllers and the integer unit pipeline. The operating system has been modified as well to implement a recovery technique based on the reutilisation of existing functions, noticeably the context switch function, in collaboration with the detection techniques applied at hardware level. A demonstrator executing representative cryptographic and image processing applications has been developed and targeted by fault injection experiments., Cette thèse s'attache à définir une méthodologie globale permettant d'augmenter le niveau de sûreté et de sécurité face à des fautes logiques transitoires (naturelles ou intentionnelles) survenant dans un système intégré matériel/logiciel, de type carte à puce. Les résultats peuvent être appliqués à tout circuit construit autour d'un cœur de microprocesseur synthétisable et d'un ensemble de périphériques spécialisés. Les méthodes de protection portent simultanément, sur le matériel, le logiciel d'application et les couches d'interface (en particulier, le système d'exploitation). Les modifications sur des descriptions de haut niveau on été privilégiées pour leurs avantages en terme de généralité, configurabilité, portabilité et pérennité. L'approche proposée vise un bon compromis entre le niveau de robustesse atteint et les coûts induits, aussi bien au niveau matériel qu'au niveau performances. Elle est appliquée et validée sur un système significatif, représentatif d'un système embarqué monoprocesseur.

This PhD researches a global methodology enabling to improve the dependability and security level against transient logic faults (natural or provoked) appearing inside a hardware/software integrated system, like for instance a smart card. Results can be applied to all systems built around a synthesisable microprocessor core and a set of specialised peripherals. The protection methods operate simultaneously and in complementary manner on hardware, application software and interface layers (most noticeably, the operating system). High level modifications have been favoured for their advantages in terms of generality, configurability, portability and perpetuity. The proposed approach aims at achieving a good trade-off between robustness and overheads, from both hardware and performance point of views. It is applied on a significant system example, representative of an embedded monoprocessor system, based on the 32-bit Leon2 processor and the eCos operating system. The processor has been modified to improve his ability to react against perturbations, by modifying its cache memories, their controllers and the integer unit pipeline. The operating system has been modified as well to implement a recovery technique based on the reutilisation of existing functions, noticeably the context switch function, in collaboration with the detection techniques applied at hardware level. A demonstrator executing representative cryptographic and image processing applications has been developed and targeted by fault injection experiments.; Cette thèse s'attache à définir une méthodologie globale permettant d'augmenter le niveau de sûreté et de sécurité face à des fautes logiques transitoires (naturelles ou intentionnelles) survenant dans un système intégré matériel/logiciel, de type carte à puce. Les résultats peuvent être appliqués à tout circuit construit autour d'un cœur de microprocesseur synthétisable et d'un ensemble de périphériques spécialisés. Les méthodes de protection portent simultanément, sur le matériel, le logiciel d'application et les couches d'interface (en particulier, le système d'exploitation). Les modifications sur des descriptions de haut niveau on été privilégiées pour leurs avantages en terme de généralité, configurabilité, portabilité et pérennité. L'approche proposée vise un bon compromis entre le niveau de robustesse atteint et les coûts induits, aussi bien au niveau matériel qu'au niveau performances. Elle est appliquée et validée sur un système significatif, représentatif d'un système embarqué monoprocesseur.