Due to its profoundness, intensity, quickness and variety, the demographic migration phenomenon became one of the most important and updated analysis element, not only for the specialists but also for the politicians and for the cultural, religious, economic and military institutions' leaders.

Due to the causes and effects they generate, and to their involvement in different geographical areas, the migration and immigration became interest issues to the geopolitical and geostrategical approaches.

The stating of the historical evolution, the actual features and the future trends point out the complexity of this phenomenon. The conclusion is very obvious: without taking into account certain adequate measures, disorders with negative effects on the national and international security may be generated.

The interventions in social are favourable when they have a scientific basis. In the military field the norms have an axiological, lawful, praxiological and purposeful foundation. That is why their production shouldn’t be emyprical and in accordance with the interpretative perspective in which it exists to leave out the arbitrary and the possibility of secondary effects occurrence.

Le foisonnnement tehnologique ouvre la voie aux "écoles virtuelles" où chacun pourra à loisir se former au moment de son choix. Nous disposons bien aujord’hui des outils pour repenser l’acte d’apprendre. Alors que cette révolution est en marche, on ne peut que regretter l’absence de pensée, à quelques exceptions près, sur la société qu’annoncent ces tehnologies.

The S.E. are systems based on knowledge, mimining the human experts. The main idea behind S.E. is the expertise that a large field of specific knowledge’s is transferred from man to computer and the users require by this, the proper advice.

The applications field of the S.E. are spread in: geology, chemistry, electronics, transports, gestions of economic organisations etc.

On the contrary, they must be conceived as help instruments in taxing decision. The S.E. have a series of limits, but none is a reason of not using them.

The advances of digital technology defined the services of the communications: voice, data and video; digital signals hardly differ from each other in the way are processed and transmitted. This change has created a phenomenal opportunity in the existing telecommunication market. It is expected that the convergence of voice and data on the same network, as well as the convergence of fixed and mobile services, will bring about a substantial change in network architecture.

All these new elements ask for a new outlook of the network management of tomorrow's telecommunications.

The article realise a comparative presentation of modern oscilloscopes in use today, their architecture, most important advantages in characterisation of analysing signals. The new generation of DPO osilloscopes offer a fully integrated measurement system, a superior acquisition speed, a rich image that let you better understand the signal, based on a new architecture and processing device.

In the fourth chapter is presented the stability in the communication network.

In the fifth chapter is presented the parameters that affects the echo and the stability of the military communications networks.

This work consists of an evaluating analysis of the structural, technical and tactical characteristics of the military binoculare optical systems. Then, on the basis of the resulting conclusions and depending of the real work conditions, it presents a method of computerised analysis that allows us to evaluate the optimum of these characteristics.

ATM is a fast pachet switching technique using short, fixed length pachets called cells. In principle, it is quite similar to other pachet switching techniques, however, the detail of its operation is somewhat different. Each atm cell is made up of 53 octets. Of these 48 octets make up the user information field (payload) at 5 octets make up the header.

The phase noise performance of a synthesizer can be described using a simplified model. In this model we consider reference noise components which appears at the system output. One measure of system performance is the steady-sate error, that is, the error remaining after transients have died out. We will be calculated and represented the transient phase error sample sequence as a function of the system parameters.

The design of computer net also needs designing of security tools ansamble. Next to evoluation of net needs, the net administrator will project the security policy. In this material on ansamble of security assurance methods, operations to apply and physical components of the net are presented.

The complexity of armoured vehicles rise quickly. The time for to verify vehicles before the fight is shortly. In this situation we propose to take into account three new caracteristics for diagnosis parameters. Acording our estimation to use eight (not five) caracteristics is necessary for a constraints safety and price .

The paper presents a combined application of rigid solid subjected to friction connections, the second haw of dynamics and variation theorems to the impulse and the cinetic energy (as elements of theoretical Mechanics) în armament technique, having as main objective determination of moving equation to the recoilment system during the supplying the weapon.

The present paper is a part of a large research work about of utilization of the water jet to the non conventional technologies. It is presented some aspect about creation a lab installation using water jet for testing easy armored plate.

The paper presents the methodology of determining the bullet’s speed within the tests of the armament by endurance shootings which ia an analytical experimental method. The purpose of determining the bullet’s speed is to establish the length of the effective necessary time until after a certain number of shot shells, the bullet’s speed decreases under a certain established value.

This study presents advantages which to offer both laser with solid active element and optic pump lamp. At the same time, this study make a comparison the two sources to radiation and specification means to processing with optic pump lamp.