Năng lượng từ sóng biển có lợi thế là hoàn toàn tự nhiên, xanh và không gây ô nhiễm, để khai thác nguồn năng lượng này, thực tế đã có nhiều phương pháp để khai thác năng lượng cơ học của sóng biển sang năng lượng điện. Bài báo giới thiệu giải pháp sử dụng máy phát điện xoay chiều tuyến tính nam châm vĩnh cửu (PMLA) là công nghệ mới hiện nay có thể chuyển đổi trực tiếp cơ năng của sóng biển thành điện năng.

Bài báo này giới thiệu mô hình toán học quá trình phóng xuồng cứu sinh tự phóng từ tàu mẹ. Mô hình toán học này là cơ sở lý thuyết cho tính toán, lập trình tính toán khảo sát quá trình phóng xuồng để đảm bảo kết cấu xuồng cũng như đảm bảo sức khoẻ người trên xuồng.

Bài báo giới thiệu phương pháp tính toán các thông số công tác của máy nén khí nhiều cấp và kết quả nghiên cứu ảnh hưởng của bộ làm mát đến công tiêu hao trong một chu trình công tác của máy nén nhiều cấp dùng trên tàu thủy. 

Diesel engines are utilized in most of heavy duty vehicles as their good performance. However, fossil fuel is being depleted currently, and emissions from diesel engine contains many toxic substances such as CO, HC, NOx, PM…which effect adversely on environment and human health. Therefore, research and application of alternative fuels which are renewable and environment friendly are under consideration in countries and as well as Vietnam. Among these fuels, Dimethyl Ether (DME) is considered as the potential fuel for diesel engine.

Collision Avoidance has always been one of the primary tasks of the ship officer, both in congested water and at the open sea. Under the stress of workloads onboard, the officer of watch might commit mistakes now and then and this may result in great losses to the ship, cargo, environment and even the human lives. On a larger scale, for a greener and more efficient shipping industry, weather routing has long been seen as a worthy solution.

In the maritime economic development strategy, the urgent important role of human resource education has been affirmed by the Vietnamese Government. At present time, this human resource primarily comes from Vietnam Maritime University (VIMARU), Ho Chi Minh City University of Transport, Maritime College No.1, Ho Chi Minh City Maritime Vocational College and a number of non-public vocational training colleges. Every year more than 3,000 students graduate from sea-going sector become the seafarer and devote their service to the Vietnam maritime industry.

At present time, the environmental pollution of the world is one of the most urgent problem for all humanity. To reduce the pollution from the ships, there are many solutions to be used such as: modification of diesel engines, using bio-diesel fuel,... Using of bio-diesel as fuel for diesel engines was well-known, however the using bio-diesel fuel for the marine diesel engine also have been restricted, because of the technology of marine diesel engine or the other problems.

One of the main concerns for the ship-owners as well as for the ship operators when sailing at the open sea is piracy threat. Those pirates usually choose the important choke points to operate, where all the ships have to pass by at one point or another. Hundreds of ships were hijacked, together with millions of seafarers and civilians were held hostage. Ransom payments for each case reached billion figures, causing incalculable consequence to the shipping industry, military force and international’s wealth.

At present time, the climate change has been effecting on the over world. There are many reasons to make the climate changed including the emissions from the diesel engines equipped on board the ships. The International Maritime Organization through the Annex VI of the MARPOL 73/78 Convention strongly requests the all Governmental Parties to take a part in the reduce the emissions from their fleet to the atmosphere. However, how to reduce the emissions from the ships is always a rather difficult question for the whole government.

After a certain time of operation, the conflict between Main engine, Propeller and Hull of ships have occurred, it causes decreasing of engine output and increasing the fuel consumption. Thus, it makes ship’s operation cost increasing respectively upon age of ships.