درخت حوزه‌های تخصصی

The South China Sea, along with the Korean Peninsula and the Taiwan Strait, is described as one of the three hotspots in East Asia because of its potential for conflict of interest and threat to peace and security. Therefore, the issue of its borders is of international importance. As a quasi-closed sea, it is home to numerous small islands and cliffs, as well as abundant living and non-marine reserves, as well as providing key maritime routes for commercial navigation. For these reasons, the sea has become the target of conflict between coastal countries and its neighbors. In this sea, the main issues in dispute are: 1- Border disputes over the determination of the lines of origin, the boundaries of the territorial seas and also the exclusive economic zone2. Territorial disputes over several islands, including the Paracel and Spratly archipelagos. Because of its superior power, as well as some unproven historical claims, China sets the nine-dash as the final line of its sovereignty, some of which extend as far as the coastal sea. The United States and the countries bordering the South China Sea strongly oppose this, as well as China's historic claims. The littoral states of the South China Sea consider the historic claims and the nine-dash claimed by the Chinese government to be contrary to the laws of the UN Convention. The United States, as a trans-regional player, also provides diverse support to coastal countries. In this research, with a descriptive analytical approach and using new sources, the disputed issues between the claiming countries have been studied and the role of the United States in terms of geopolitical competition has been analyzed.

The main purpose of this study is to provide a model for recording human capital experiences based on a knowledge handbook in marine educational and research-oriented organizations. Other objectives of this research are to find the complication of efficient implementation of learning management in marine educational and research-oriented organizations and to achieve a model for acquiring tacit knowledge of experts in the form of a knowledge handbook. In this direction, challenges and solutions to improve the situation and implementation of this model are presented. The present study is applied in terms of purpose and qualitative and quantitative in terms of the data collection method. This research has been done in two stages: the requirements for implementing a knowledge handbook and the step-by-step model for developing a knowledge handbook. Finally, both models were evaluated based on the structural equation approach with PLS software, and with the approval of experts, the validation steps were performed and a suitable solution was provided. The organization knowledge handbook implementation requirements model includes 5 main components of organizational leadership, Staff culture, technology, Staff learning, and system process, which are explained by 53 items; Also, the model of compiling the knowledge handbook of the organization includes approaches of recognizing and selecting the appropriate expert, organizing discourse sessions, reasoning the results, localization of 

From ancient times, piracy has been known as an enemy of humanity and an international crime. One of the areas that has become the main center of piracy in recent years is the Gulf of Guinea . Due to the discovery and exploitation of rich oil resources, and the high traffic of oil tanker ships and other fishing and cargo ships, this area has been considered by pirates and has made maritime security confronted with a serious threat. According to statistics, between 2009 and 2021, about 265 cases of pirate attacks on ships have been reported in this region, which is regarded as the highest figure in the whole. The main question is, what are the effective causes of the creation and expansion of piracy in the Gulf of Guinea? And what solutions are there to confront this phenomenon? In response to this question, the hypothesis is that regional differences and the political, economic and social situations of the coastal states are the most important reasons in the spread of piracy in this region, and regional and extra-regional measures to confront it are inevitable. But the weakness of the countries in the region in securing the sea fleet, widespread unemployment, conflicts between countries in delimiting the borders of the sea, have made it difficult to fight against piracy in this region. The findings of this research show that identifying and eliminating the various factors involved in the occurrence of this crime depends on efforts beyond diplomatic cooperation. The lack of similarity between criminal measures and especially the obvious difference in the political conditions of the countries of the region compared to other regions facing the phenomenon of piracy, such as the case of the Gulf of Aden, makes it impossible to apply a similar solution to the Gulf of Guinea.