Yasin Arslanoğlu

Istanbul Technical University · Department of Maritime Transport and Management Engineering

Modern sociotechnical engineering systems are comprised of dynamic and complicated man-machine-software interactions. These complex systems, such as ships, also pose a wide range of catastrophic risks. In this study, a real ship casualty that occurred in recent years was analysed using the rule-based Fuzzy Failure Modes and Effects Analysis (FFMEA)...

A decision support system is proposed for the condition-based maintenance of ship machinery systems based on the adaptive neuro-fuzzy inference system (ANFIS) approach. A case study is conducted for a container ship's main diesel engine. Within the scope of the methodology, the main engine power is predicted based on exhaust gas outlet temperatures...

This study aims to evaluate the use of LNG, methanol, and ammonia on ships as an alternative marine fuel. In this sense, firstly, the SWOT analysis is conducted, so the strengths and weak sides of the alternative fuels are determined. In the second step of the study, various criteria such as safety, cost, exhaust emission, global warming potential,...

Decarbonization strategies such as renewable energy, alternative fuels, and modifications on ships play an essential role in reducing global warming, but fossil fuel consumption is inevitable for meeting the sufficient energy demand. On the other hand, CO2 is one of the reasons for global warming, which can be mitigated by using a carbon capture sy...

This study presents the state-of-art and future trends of the maintenance approaches to ship machinery systems. A systematic review process is conducted to identify relevant literature. Firstly, literature is examined by bibliometric analyses based on the determination of the distribution of papers by years, the top authors, papers, journals, and o...

To comply with the International Maritime Organization’s sulfur regulations, shipping companies have mainly favored scrubber systems. Even though the ship’s operations might be continued provided regulatory constraints are followed, the installation presents system-based risks depending on the scrubber type. This study’s primary aim is to inform th...

Ballasting and de-ballasting operations play a critical role in maintaining stability and safety onboard tanker vessels. The process involves considerable risks to human health, the marine environment and property since the failures during the operation may lead to loss of equipment, serious balance defection and related safety problems, and harm t...

This study highlights that in addition to using ammonia in the maritime sector and integrating it into the ship concept, it is a challenging option for shipowners in terms of capital and operational expenditures. In this study, the typical marine-type fuels used in the main engines of a bulk carrier were compared to ammonia in a Techno-Economic Ana...

A feasibility analysis was conducted on a crude oil tanker. Differences in power generation and fuel consumption of the diesel generators based on the noon report of the specified marine vessel were analyzed for similar periods before and after the scrubber application. Accordingly, the changes in releasing amounts of emissions were calculated. The...

Maritime sector-based accidents are the source of major environmental disasters that place the sea environment at risk. It is critical to identify hazards and risk factors to avoid accidents and minimize losses. The importance of the Polar Regions in protecting the global ecosystem and nature has been identified as crucial. An environmental problem...

In recent years, shipborne emissions have become a growing environmental threat. The International Maritime Organization has implemented various rules and regulations to resolve this concern. The Ship Energy Efficiency Management Plan, Energy Efficiency Design Index, and Energy Efficiency Operational Indicator are examples of guidelines that increa...

This paper proposes a hybrid multi-criteria decision-making approach to determine the best maintenance strategy for the machinery systems in autonomous ships of different levels of autonomy. The proposed methodology includes the Analytic Hierarchy Process to identify criteria weighting and the Technique for Order of Preference by Similarity to Idea...

The impact of digitalization on the maritime industry is increasing day by day. In this sense, realistic engine room simulators (ERS), which fulfill the requirements of the International Maritime Organization, are getting more important and frequently used in the field of maritime education and training. Besides, it is observed that there is an inc...

Sea pollution has negative consequences and has an impact on the marine ecosystem and ship machinery processes. The main risk of sea pollution on ship is based on sea chests that are used for ballast water and firefighting. In addition to this, sea chest fouling, which primarily forms as a result of pollution, has an impact on the ship machinery, n...

In recent years, the usage potential of alternative energy sources has been gaining importance to increase the efficiency of ships within the scope of the obligations brought by international mar-itime regulations. The possibility of using alternative energy sources such as solar energy, wind energy, fuel cells, and waste heat recovery technologies...

Despite the rapid advancement of technology and the increasing complexity of systems, conventional accident analysis techniques developed many years ago are still used in numerous sectors. On the other hand, these approaches are limited in detecting all underlying causes of accidents in complex socio-technical systems. In recent years, system theor...

Shipping effectively covers a large part of cargo transportation in the world in an economical and reliable way. Thus, energy-efficient operation on ships is an essential subject to ensure both increasing of the efficiency level of the global transportation and economic savings. In this subject, an effective maintenance strategy followed in the shi...

In recent years, ecological degradation has increased and drawn many environmental problems with it. One of the outcomes is the mucilage problem, which directly affects tourism, fishing, and especially the maritime sector. The recent mucilage outbreak in the Sea of Marmara has brought attention to these environmental disaster-related studies. Howev...

Various strategies are currently investigated in the literature to meet decarbonization aim introduced by In-ternational Maritime Organization. These methods could be categorized under two headings; utilization and adaptation of alternative marine fuels & alternative energy sources and application of operational efficiency increasing methods. These...

In this paper, prognostics and health management systems, and reliability centered maintenance strategy for the autonomous marine vessels have been evaluated. The application steps of the approaches are presented and the points to be considered in case the methods are applied in autonomous ship machinery systems are stated. As a result of the study...

Climate change is caused by increased fossil fuel usage. Climate change is currently a significant matter impacting the environment. At the COP21 climate change summit, a new purpose of keeping global temperature rise below 2.5°C was set. After three years of planning, the International Maritime Organization (IMO) released its Initial Greenhouse Ga...

Container ships transport a large number of valuable cargoes, and there is a demand for less expensive and faster transportation options. Weather, vessel type, and the nature and amount of the goods are all external elements that might impact container handling times, which are directly related to overall port stay time. In this scope, container te...

Although the accelerating technological developments and strict maritime regulations aim to prevent the occurrence of new accidents, according to the reports published every year, maritime accidents with tragic consequences continue to be experienced. Despite the number is decreasing, these maritime accidents cause devastating and long-lasting effe...

Cargo operations on tanker vessels involve high risks to crew and the marine environment. At the time of loading and unloading of cargoes and tank cleaning operations, consequences of accidents may be severe such as loss of lives, property loss and marine pollution. One of the most critical accidents is an explosion which may advance to a large fir...

Rapid changes in voyage orders and increased container throughput could lead to undesirable situations such as incidents or accidents in maritime ports. As the demand for maritime transport grows, historical accident reports and data-driven approaches could help to achieve safer and quicker door-to-door transportation. In this scope, the cargo oper...

PURPOSE: The Marmara Sea has recently been confronted with the mucilage event, which is a serious environmental problem, especially in narrow areas. Agricultural activities are carried out intensively in the Marmara Region as well as many seaports and industrial facilities. Marine and air pollution increased over the years as a result of the discha...

Purpose: Safety has always been a critical issue for maritime transportation, especially in narrow and critical waterways. Turkish Straits are considered one of the most dangerous waterways around the world due to harsh physical environment. Strong currents, sharp turns, congested vessel traffic and variable weather conditions pose significant chal...

In recent years, ecological degradation has increased and drawn many environmental problems with it. One of the outcomes is the mucilage problem, which directly affects tourism, fishing, and especially the maritime sector. The recent mucilage outbreak in the Sea of Marmara has brought attention to these environmental disaster-related studies. Howev...

Maritime transportation is more preferable day by day with the increase in cargo capacity worldwide. Therefore, the number of voyages take place in the seas is increasing and more intensive maritime traffic occurs in narrow channels. One of the difficult and dense seaways in the world is the Istanbul Strait, which is one of the most important strat...

Environmental pollution is caused by fossil fuels, so the importance and use of renewable sources of energy have grown in recent years. Instead of fossil fuels, harvesting energy from renewable sources such as wind, solar, and water will minimize emissions accumulated in the atmosphere and thereby provide a sustainable environment. In this study,...

Ship Energy efficiency has become an important concern for ship owners and all stakeholders in the maritime sector. With rising environmental awareness, the problem of reducing ship-borne pollution is becoming more and more important. For this purpose, it is crucial to maintain appropriate methods to sustain energy efficiency and reducing the emiss...

Container terminals are complex facilities which serve to maritime transportation. Effectivity and productivity of the terminals are very crucial for international transportation. Often, terminal managers deal with logistic problems with high costs. Reducing operation cost and time are the key elements for a smooth and secure process. To minimize t...

The efficient management of marine vessels ensures that ships could operate smoothly and navigate at the most efficient level. Thus, the environmentally friendly voyage realises with the optimised running cost. Such a management approach could be achieved via a planned and proper maintenance strategy on the critical parts of the marine vessels’ com...

In the maritime industry, personnel selection has an important role in the safe and efficient operation of the vessels. The selection of personnel who are not suitable to work on the ship could cause conflicts between personnel on board and jeopardize the safety of vessel operations. The cause of many operational or navigational troubles and accide...

In order to combat climate change, IMO promotes the implementation of energy-efficient and clean operations in the maritime field. Ships’ hull cleaning is one of the implementations that could be carried out for this purpose. In this study, the performance data of a commercial container ship whose hull has been cleaned has been examined. It has bee...

An improvement of the marine vessel's fuel consumption will provide efficiency and profitability in ship management since fuel cost is one of the biggest operating cost. However, estimation of the fuel consumption of marine vessels is a difficult issue, because the fuel consumption rate of the vessel is directly dependent on multiple external facto...

Like every sector, the maritime sector also has problems and needs to be solved within itself. Fuel consumption on ships and reduction of emissions are the most important expenses for shipping. In addition to IMO, states and other international organizations work on decreasing the fuel consumption on ships and reducing the amount of harmful gases e...

Environmental safety is the implementation of policies and procedures that ensure that a surrounding in workplaces is safe from dangers that could cause harm to an employee working in those areas. It is a sign of the safety performance and safe work behavior which could be estimated by analyzing. Assessment of safety issues on marine vessels is sig...

Officer of the watch (OOW) is an important part of the maritime labor market. For many years, countries have been improving their development of OOWs for the maritime market, in terms of both quantity and quality. As the supply of qualified OOWs for maritime transportation is such an important issue, shipping companies recruit multinational OOWs fo...

Drifters are used not only for navigation and navigational safety of ships, but also for physical, chemical, biological, environmental and also meteorological investigations of the seas. In addition all, drifters and systems are used to verify hydrographic and oceanographic data obtained from the satellite as a local source. With this study, Lagran...

According to Marine Sciences, drifters have been used for warning, security and guidance. In addition to these areas, drifters are also used for scientific purposes like hydrographic and oceanographic today. In this study, the oceanographic drifter designed to collect scientific data from the Istanbul Strait. The sensor system was designed for this...

Today, a significant portion of commercial freight transport is carried out by vessels. Therefore, shipping industry is a big part of industry and trade. Even if a lightning strike is in very short time, can cause huge damages to vital systems such as mechanical systems and electrical system at the ship. In this situation, it is necessary to protec...

In ships, fuel amounts are the biggest items that affect the cost of one trip. All the professional operations on a ship affect fuel consumption. Of all the clients on board, the most important is the ship's diesel engine that produces the main energy that provides the joy of the ship. For this reason, in recent years, the issue of improving the en...

The iron/diphosphine‐catalyzed annulation of a carboxamide possessing a bidentate directing group with an internal alkyne proceeds in the presence of phenylzinc halide as a base at 40 °C to produce a variety of indenone derivatives. The reaction proceeds through iron‐catalyzed C‐H bond activation of the carboxamide, followed by insertion of the alk...

Asymmetric Mg (II) or Al (III) phthalocyanine (containing a COOH group and 3-pyridylsulfanyl units) was conjugated via an amide bond to amino functionalized magnetic nanoparticle (AIMN) to form MgPc-AIMN or AlPc-AIMN conjugate, and characterized. The photophysicochemical behaviour of the phthalocyanine-AIMN conjugates was investigated and compared...

Bosphorus (Istanbul) Strait is a maritime waterway which connects the Black Sea to the Marmara Sea and also very important trade connection for many countries. This strait must be carefully controlled and checked by local authorities because of its strategic importance. Buoy systems which has a remote sensing systems could be used to continually mo...

Nowadays, transportation of the goods mostly has done with the ships because of the economical reasons. While shipping freight rates have declined in recent years, increased expenditures have put companies in very difficult situations. Companies are trying to avoid economical crisis by increasing efficiency while decreasing costs. This work aimed t...

Electromagnetic radiation is known negative effects on humans and environment. The investigation of these effects has always been the subject of many researches. In this study, the sources of electromagnetic field generated in two marine vessels used for seismic researches were detected and their magnetic field levels with 50 Hz frequency by using...

Zn2+ and Co2+ metallated phthalocyanines having four calixpyrrole units have been prepared from a calixpyrrole phthalonitrile using Zn2+ or Co2+ salts as templates of phthalocyanine macrocycle. Host-guest complexes between the anions (Cl-, F- and Br- and H2PO4-) and the calixpyrrole units are formed as evidenced by the shift in the reduction potent...

Metal free phthalocyanine grafted polypyrrole and cobalt metallated phthalocyanine grafted polypyrrole nanofibers were prepared by electrospinning method. The electrospun PPy and phthalocyanine grafted polypyrrole fibers were coated on indium tin oxide electrode surface for a proper investigation of the electrochemical activity of the fibers. Diffe...

Electrospinning is an efficient method for the production of polyamide nanofiber membranes that are suitable for water filtration. Previous studies have shown that nanofiber membranes have high clean water permeability. The pathogen removal efficiency can be improved by functionalization with (organic) biocides. However, these membranes, like other...

Peripherally substituted symmetrical phthalocyanine derivatives have the potential to use in a wide range of high technology applications, such as in catalysis, in photodynamic therapy, in electrochromic display devices, and as a molecular electronics, or magnetic devices. Phthalocyanines possess an extended π-conjugated electron system which permi...

This work reports on photophysical properties of the non-peripherally and peripherally substituted zinc phthalocyanines (Pcs) prepared by two different synthetic routes. Tetra-substituted non-peripheral (5) and peripheral (6) zinc phthalocyanines containing 4-mercaptophenol groups were synthesized from novel phthalonitrile derivatives for the first...

Peripherally and non-peripherally tetrasubstituted-[(N-methyl-2-pyridylthio)]phthalocyaninato magnesium (II) (5 and 6) and chloro aluminium (III) (7 and 8) tetraiodide have been synthesized and characterized. The photophysical properties of the complexes in dimethyl sulfoxide (DMSO) and aqueous medium in the presence and absence of cremophore EL ha...

This work reports on the synthesis, characterization, photophysical properties and electrochemical characterization of new tetra-substituted titanium phthalocyanine with dimethylaminoethanol groups on peripheral positions (2) and water-soluble quaternized counterpart. The water-soluble titanium(IV) phthalocyanine derivative (3) was found to be aggr...

Magnesium and aluminium phthalocyanines tetrasubstituted with 2-(dimethylamino) ethanethiol have been synthesized (complexes 2 and 3). The prepared complexes were converted to water soluble ones by quaternizing with methyl iodide. The quaternized complexes (2Q, 3Q) show monomeric behaviour in organic solvents but show aggregation in water, especial...

The syntheses and photophysical properties of metallophthalocyanines containing Mg(2+) and Al(3+) as central metal ions and their unmetallated derivative (complexes 3-8) tetra- substituted at the non-peripheral (α) and peripheral (β) positions with 2-mercaptopyridine are reported. The trends in triplet and fluorescence quantum yields are described...

In this paper we report on the use of carboxylic acid functionalized single walled carbon nanotubes (SWCNT) in the synthesis of 2,(3)-tetra-(4-oxo-benzamide)phthalocyaninato cobalt (II)–single walled carbon nanotube conjugates (CoTOBPc–SWCNT), their characterization and application in the electrocatalytic oxidation of amitrole. Cyclic voltammetry,...

This work reports on the synthesis and photophysical properties of novel unsymmetrically substituted monocarboxy magnesium (MgPc, 3), aluminum (ClAlPc, 4) and unmetallated (H2Pc, 5) phthalocyanines. Magnesium phthalocyanine (3) was converted into water soluble quaternized derivative (QMgPc, 6) by reaction with methyl iodide. The synthesized phthalo...

The syntheses of 2,(3)-(peripheral) and 1,(4)-(non-peripheral) (2-mercaptopyridine)phthalocyanine complexes of titanium(IV) oxide (5a and 6a, respectively), vanadium(IV) oxide (7a and 8a, respectively) and tantalum(V) hydroxide (9a, peripheral only) and their electrochemical characterization are presented in this report. Their electrochemistry is c...

We report on the synthesis of 2,(3)- (peripheral) and 1,(4)- (non-peripheral) (2-mercaptopyridine)phthalocyanine complexes of titanium (IV) oxide (5 and 6 respectively), and tantalum (III) hydroxide (7, peripheral only), their photochemical and photophysical parameters and the photocatalytic oxidation of cyclohexene in the presence of gold nanopart...

A new class of soluble unsymmetrically substituted metallophthalocyanines (M = Zn, Ni, Co) bearing a crown ether and six alkylthio substituents was synthesized and their electrochemical and spectroelectrochemical properties studied. Cyclic and square wave voltammetry revealed well-defined ligand-based oxidation and reduction processes within the co...

Detailed electrochemical characterization of catecholato-octakis(2-dimethylaminoethylsulfanyl phthalocyaninato) titanium(IV) and (2,3-naphthalenediolato)-octa-(2-dimethylaminoethylsulfanylphthalocyaninato) titanium(IV) derivatives has been carried out by cyclic voltammetry, differential pulse voltammetry, double potential step coulometry, controlle...

Several titanium phthalocyanines tetra- and octa-substituted with dimethylaminoethylsulfanyl groups on peripheral positions have been synthesized and characterized. These phthalocyanines were converted into water-soluble quaternized products by reaction with methyl iodide. The capping of the titanyl (metaloxo) inner core with catechol and 2,3-dihyd...

This work reports on the synthesis of new unsymmetrically substituted phthalocyanines (M = Zn, Cu, Co, Ni) bearing three benzo-15-crown-5 units through oxy bridges and a nitro group. Phthalocyanines were prepared by a statistical condensation of 4-nitro phthalonitrile and 1-{[(benzo-15-crown-5)-4'-yl]oxy}phthalonitrile in the presence of anhydrous...

Detailed electrochemical characterization of tetrakis(2-dimethylaminoethylsulfanyl phthalocyaninato) oxotitanium(IV) and octakis(2-dimethylaminoethylsulfanyl phthalocyaninato) oxotitanium(IV) derivatives has been carried out by the cyclic voltammetry, differential pulse voltammetry, controlled potential chronocoulometry and spectroelectrochemical m...

Phthalocyanines with four or eight hexylthio-substituents on the periphery were prepared by cyclotetramerization of 4-hexylthio1,2-dicyanobenzene and 4,5-bis(hexylthio)-1,2-dicyanobenzene. The new compounds were characterized by elemental analyses, H-1 NMR, IR and UV-VIS spectral data. The electronic spectra exhibit intense Q band near-IR region at...