Scientific Journal of Gdynia Maritime University

Assessment of the Interplay of Various Factors in Port Governance: Development of the Theoretical Framework

Jedrzej Charłampowicz — Fri, 28 Mar 2025 00:00:00 +0000

Port governance plays a pivotal role in shaping global trade efficiency, sustainability, and resilience. This study develops a comprehensive framework integrating political, environmental, economic, risk-related, and change-oriented dimensions to address the complexities of modern port management. By synthesizing institutional theory and contemporary governance challenges, the framework provides actionable insights for achieving sustainability, operational adaptability, and stakeholder collaboration. The study highlights such critical constructs as political stability, environmental management, and leadership, offering a structured approach for empirical evaluation through a questionnaire tool. While advancing theoretical understanding, this work also identifies limitations and proposes future research directions to refine port governance models and address emerging global challenges.

Evaluation of Changes in Physicochemical Parameters of Rape and Soybean Oils during the Frying Process of French Fries

Maria Dymkowska-Malesa, Monika Radzymińska, Beata Erlichowska — Fri, 28 Mar 2025 00:00:00 +0000

Fats, including vegetable oils, are an important component of the diet. They not only have a high energy value, but also contain nutrients that are essential for the proper functioning of the human body. The increasing consumption of fried products affects the consumption of the oils used for a long time in the deep frying processes. Vegetable oils contain large amounts of unsaturated fatty acids, which are subject to oxidative and hydrolytic processes, while thermal polymerization can also occur in them. The aim of the study was to compare the oxidative stability of rapeseed and soybean oils while frying potato chips in them at 180°C. The study presents changes in the acid and peroxide values, as well as changes in the sensory characteristics of the oils under the influence of heating. The studies showed that rapeseed oil was characterized by greater sensitivity to oxidation compared to soybean oil. Soybean oil contained more hydrolysis products, but during the frying process their increase was similar to the products formed in rapeseed oil.

Value Stream Mapping as a Method Enabling the Optimization of the Technological Process Based on the Example of the ZSP "Lubiana" S.A. Porcelain Tableware Company

Fri, 28 Mar 2025 00:00:00 +0000

Value Stream Mapping (VSM) is a technique aimed at optimizing the manufacturing process by minimizing waste and other losses that affect the amount of value added. It is a graphical method that uses a block diagram to illustrate the key stages of the production process, pinpoint areas and causes of delays in receiving the final product, and provide numerical process data as indicators of efficiency and profitability at each production stage. This article presents the method of building a value stream map using the example of ZPS "Lubiana" S.A. and attempts to assess the effectiveness of this method.

Strategic Development of Point-to-Point Green Shipping Corridors: A Case Study Using the Interpretive Structural Modelling and Micmac Framework

Marijan Brubnjak, Alen Jugović, Miljen Sirotić, Goran Kolarić — Fri, 28 Mar 2025 00:00:00 +0000

Point-to-point green shipping corridors are specific maritime routes where the feasibility of zero-emission shipping is catalyzed through coordinated public and private actions. These corridors focus on deploying zero-emission vessels on direct transit routes, fostering sustainable fuel supply chains, and implementing harmonized regulatory frameworks that support decarbonization efforts between two designated ports within the maritime value chain. Currently, they are in the initiation stage, where stakeholders strive to establish a shared vision to enhance their conceptual clarity and align their strategic objectives within the maritime value chain. The aim of this paper is to deepen the understanding of the strategic development of point-to-point green shipping corridors by creating a systemic interrelated relationship between seven identified key constituent factors. The ISM methodology is utilized to construct the hierarchical interrelationships among the factors whereas the MICMAC methodology systematically classifies them based on their respective driving and dependent powers. The findings indicate that High Initial Investment Costs and the Availability of Alternative Fuel Networks are primary factors and drivers, impacting other factors within the hierarchial system.