Frequency hopping is used in different communications systems for its robustness by providing frequency diversity against jamming and interfering signals. Successful detection and demodulation of a frequency hopping signal is dependent on proper tuning to transmit frequency and time synchronization of the burst. The sequence of hop frequencies is generally determined by a Pseudo-Noise (PN) sequence and time synchronization is achieved using synchronization preambles in the transmit burst. Successful acquisition of the hop frequency sequence could be achieved when at least a single burst’s data is successfully decoded at the receiver. This paper studies the serial search code acquisition which is the first step of synchronization for frequency hopping spread spectrum (FHSS) system over Rician fading channel. Simulation results show the effect of fading channel on the code acquisition.
This paper presents a methodology to validate a virtual test procedure for vehicle gradeability performance. It is a test dedicated to both the civilian and military off-road vehicles, an 8 x 8 Armoured Personnel Carrier being selected for the purpose of the paper. TruckSim is the software used to implement the vehicle math model and the test procedure. The simulation results are compared with the experimental results for a 60 % gradient. The vehicle speed and the engine speed graphics, the statistical analyze, and the comparison between the simulation test animation and the experimental test movie are the methods applied to validate the virtual longitudinal slope test procedure.
Many organizations are driven by the market to set their goals in their performance. Some of the goals are: cost reduction, achieving sales levels, increasing the number of customers, increasing the market percentage, improving productivity and quality, innovative products. Challenge becomes extremely acute in the case of companies that continue to expand on new markets. In order to be easily understood, the organization’s objectives should be translated into a language easy to understand for all levels of the organization, that is to be traced in clear objectives, specific to each position, being imparted to the level of unity, team and individual.
Insolvency represents the state of the debtor’s patrimony characterized by insufficient funds available for the payment of certain, liquid and due debts. It may occur even in case of strong companies, for example, in case of listed companies, generating loses for investors. In economic theory, a series of insolvency risk prediction models were developed, based on the method of scores, the most known and used being the Altman model. At the present moment, five companies, traded at Bucharest Stock Exchange are insolvent. The aim of this paper is to establish if the Altman model can successfully be used for Romanian traded companies, to determine the risk of insolvency.
A new trend began to emerge with the improvement of living conditions and medical advancement: the trend towards longevity. This trend appeared slowly at beginning of the industrial revolution but has increased significantly in the 20th and the 21st centuries. This trend, which initially started hesitatingly in developed countries, has now extended to reach across the entire planet. Europe, as an initiator of the industrial revolution, is one of the world’s regions with the most aged population. One consequence of an aging process compounded by a drop in fertility rates is reflected in the organizational context, where potentially available employees are also much older. This has led to many changes in the proportion of employees over 60 years of age, and will require other changes in order to provide the human resource necessary for the optimal progress of professional activities.
Nowadays, the military forces’ operational environment is shaped by dynamic changes that give its most representative characteristics such as volatility, uncertainty, complexity and ambiguity (VUCA). Based on this and taking into consideration the tendency of NATO to use more prominently its multinational military structures, we are obligated to adapt our way of teaching and training if we want to be effective in the process of educating the next leaders for future military environments. In other words, during the classes, also in the field, we should try to educate and train our cadets, at least, to think from a joint, interagency, intergovernmental and multinational (JIIM) perspective when conducting military actions, even at a small tactical level, such as the platoon.
Modern society is characterized by the increasing interdependence between the actors of the international environment, in the conditions of globalization of all the fields of social life. Increasing interdependencies, together with the emergence of new risks and threats, which attempt to exploit systemic vulnerabilities, which are increasingly numerous and difficult to eliminate, bring a new issue to states and other security environment actors: to ensure the protection the infrastructure elements that are indispensable to the normal activity of the population, economic agents, nongovernmental organizations and state institutions. Critical Infrastructure Protection becomes an important point on the agenda of all decision-makers who are in a position to counter the asymmetric threats that jeopardize national interests and democratic values. Due to the multiplication of risks and threats and the multiplication of interdependencies between the various infrastructure elements, the protection of critical infrastructures can not be achieved effectively only by ensuring their physical protection. The cascading effects of a disturbance can be felt at the level of society as a whole, and it is therefore necessary to address the issue of ensuring the protection of critical infrastructures in a comprehensive manner including infrastructure and community resilience issues.
Individual physical, mental and functional qualities require a well-trained training system that can deliver the very complex tasks outlined in the training objectives. The individualization of the training process and the permanent monitoring of performance is an effective way to maximize the physical and mental potential of military.
The two concepts, knowledge management and project management have been steadily developing in recent years, with the current effort being the creation of a synergic effect from the two. The article demonstrates the need for a structured framework to group and facilitate the reuse of information and the generation of new knowledge in project management. In this context, knowledge management meets these requirements, providing a tool for improving project management practices. The article contains a review of the advantages and benefits that developers can get by adopting and implementing a project management strategy. An important contribution of the article is to develop a way to apply knowledge management in project management. This starts from the idea that a knowledge management cycle consists of four stages, which can also be applied in project management, and the knowledge passing through these stages goes through a filter, improves and generates a new knowledge.
As a managerial tool, accounting is put in the service of management, ensuring the link between the operational system and the entity’s administrating management system. In an economic context with radical and often unexpected changes, we feel that there is a constant need to improve the use of management accounting information for management based on coherent development programs combined with the regulations in force to harness the potential of the organization, the benefits it can use and minimize risks through more coordination, dynamism, and reasoning. The paper highlights that the management accounting system is involved in the internal management of the entity and provides vital information to managers in several interconnected areas: forecasting, cost calculation and analysis, coordination, decision-making, control, evaluation. Starting from the aspects that highlight the necessity and usefulness of management accounting information for management, through the selective research carried out on a sample of 301 entities, we aimed to analyze the opportunity of providing information through the management accounting system, with a series of conclusions based on the associations established.