Turnover intention, job satisfaction and workload in ship crew workers: a systematic literature review

Turnover is an activity that harms company operations. Turnover is related to job satisfaction, which is influenced by the level of workload balance. Based on this relationship, the company must formulate a strategy for the factors influencing these three aspects. Previous research has explored influencing factors regarding turnover, job satisfaction, workload, a combination of two variables, or involving all three variables. Previous research has involved these three variables, but the recommendations from previous research still need to be more optimal (turnover still occurs). Therefore, researchers need to analyze gaps and trends from previous research. This will help future research to develop more optimal strategies. Gap and trend analysis in this study used a systematic literature review (SLR) with the PRISMA reporting method. Search results through the SCOPUS database produced seventeen articles. The results of the SLR analysis show that most research was conducted in Africa, oriented to the health sector, and used qualitative methods

Extraction of Hydrophobic Analytes from Organic Solution into a Titanate 2D-Nanosheet Host: Electroanalytical Perspectives

Titanate nanosheets (single layer, typically 200 nm lateral size) deposited from aqueous colloidal solution onto electrode surfaces form lamellar hosts that bind redox active molecular redox probes. Here, hydrophobic redox systems such as anthraquinone, 1-amino-anthraquinone, deca-methylferrocene, 5,10,15,20-tetraphenyl-21H,23H-porphine manganese (III) chloride (TPPMnCl), and α-tocopherol are shown to bind directly from cyclopentanone solution (and from other types of organic solvents) into the titanate nanosheet film. For anthraquinone derivatives, stable voltammetric responses are observed in aqueous media consistent with 2-electron 2-proton reduction, however, independent of the pH of the outside solution phase environments. For decamethylferrocene a gradual decay of the voltammetric response is observed, but for TPPMnCl a more stable voltammetric signal is seen when immersed in chloride containing (NaCl) electrolyte. α-Tocopherol exhibits chemically irreversible oxidation and is detected with 1 mM–20 mM linear range and approximately 10 −3 M concentration limit of detection. All redox processes exhibit an increase in current with increasing titanate film thickness and with increasing external electrolyte concentration. This and other observations suggest that important factors are analyte concentration and mobility within the titanate host, as well as ion exchange between titanate nanosheets and the outside electrolyte phase to maintain electroneutrality during voltammetric experiments. The lamellar titanate (with embedded tetrabutyl-ammonium cations) behaves like a hydrophobic host (for hydrophobic redox systems) similar to hydrophobic organic microphase systems. Potential for analytical applications is discussed. </p

An Analysis and Design of Adaptive Assessment System for Manufacturing Industry 4.0 Implementation in Indonesia

The implementation of Industry 4.0 technology has developed rapidly. Despite its development, Indonesia is still nascent and requires some implementation monitoring in its priority industries. This study aims to design a system for assessing the readiness of implementing Industry 4.0 in priority manufacturing industries in Indonesia. A Fuzzy Inference System framework with six main dimensions has been developed to assess the level of readiness for Industry 4.0 in priority manufacturing industries. The six assessment dimensions are Legal Consideration, Products and Service, Manufacturing and Operations, Strategy and Organization, Supply Chain, and Business Model. These dimensions have been developed into a complete assessment system for evaluating the level of readiness for implementing Industry 4.0. Validation of the system has shown that the multi-dimensional assessment system can provide appropriate assessment results to assess the level of readiness for Industry 4.0 in priority manufacturing industries

3D Printing for medical devices: Mini review and bibliometric study

The technology of three-dimensional (3D) printing is transforming modern living. 3D printing has been a technical breakthrough because it can swiftly and precisely construct intricate and customized medical items. The study examines the pros and cons of technology as well as the possibilities of 3D printers for medical applications. The study includes bibliometric analysis based on previously published studies as well as a thorough examination of the literature. The paper examines both the benefits and drawbacks of 3D printing as it relates to medical devices. The numerous techniques and applications that can be applied, including stereolithography, fused deposition modeling, and digital light processing, are covered in the article. The outcomes of the systematic literature review demonstrate the possibilities for 3D-printed medical equipment in the fields of surgery, personal gadgets, and eco-friendly based materials. However, because of the delicate nature and intricacy of the materials, combining biodegradable polymers with biological components as a 3D printing material can be an eco-friendly alternative

A review of Microfluidic blood separation techniques

Microfluidic blood separation is a modern biological technology used to separate blood cells from their fluids. Blood cells present in the blood become an important outline of many diseases. To maintain the stability and sterility of blood, a tool with renewable technology and a large capacity is needed. Microfluidic blood separation has important assets, especially changes in the physicochemical properties of blood cells that are used for quick and accurate clinical diagnosis. Dissemination of structural materials and compositions from the separation and sorting of blood uses a technical system that will create this optimal microfluidic blood separation in research. As for this paper structure starts with introduction, then continued with literature review, type of Microfluidic methods, application of Microfluidic, and bibliometric analysis. With those methods the result could be conducted with systematic literature reviews. Therefore, this study is prepared to identify research gaps in topics related to Microfluidic blood separation techniques. Related studies about microfluidic blood separation techniques are identified using bibliometric analysis and systematic literature review of the study search index through database Scopus-indexed publications. The results from this paper reveal the topics in urine as a parameter for Microfluidic separations as the research gap according to Microfluidic separations. This paper expects research on Microfluidic blood separation techniques will continue to be developed to maximize the potential of Microfluidic blood separations in helping the research process

Extraction of Hydrophobic Analytes from Organic Solution into a Titanate 2D-Nanosheet Host: Electroanalytical Perspectives

Titanate nanosheets (single layer, typically 200 nm lateral size) deposited from aqueous colloidal solution onto electrode surfaces form lamellar hosts that bind redox active molecular redox probes. Here, hydrophobic redox systems such as anthraquinone, 1-amino-anthraquinone, deca-methylferrocene, 5,10,15,20-tetraphenyl-21H,23H-porphine manganese (III) chloride (TPPMnCl), and α-tocopherol are shown to bind directly from cyclopentanone solution (and from other types of organic solvents) into the titanate nanosheet film. For anthraquinone derivatives, stable voltammetric responses are observed in aqueous media consistent with 2-electron 2-proton reduction, however, independent of the pH of the outside solution phase environments. For decamethylferrocene a gradual decay of the voltammetric response is observed, but for TPPMnCl a more stable voltammetric signal is seen when immersed in chloride containing (NaCl) electrolyte. α-Tocopherol exhibits chemically irreversible oxidation and is detected with 1 mM–20 mM linear range and approximately 10−3 M concentration limit of detection. All redox processes exhibit an increase in current with increasing titanate film thickness and with increasing external electrolyte concentration. This and other observations suggest that important factors are analyte concentration and mobility within the titanate host, as well as ion exchange between titanate nanosheets and the outside electrolyte phase to maintain electroneutrality during voltammetric experiments. The lamellar titanate (with embedded tetrabutyl-ammonium cations) behaves like a hydrophobic host (for hydrophobic redox systems) similar to hydrophobic organic microphase systems. Potential for analytical applications is discussed. Keywords: 2D-nanosheet, Microphase, Hydrophobicity, Electrocatalysis, Sensor, Membran

Processes associated with ionic current rectification at a 2D-titanate nanosheet deposit on a microhole poly(ethylene terephthalate) substrate

Films of titanate nanosheets (approx. 1.8-nm layer thickness and 200-nm size) having a lamellar structure can form electrolyte-filled semi-permeable channels containing tetrabutylammonium cations. By evaporation of a colloidal solution, persistent deposits are readily formed with approx. 10-μm thickness on a 6-μm-thick poly(ethylene-terephthalate) (PET) substrate with a 20-μm diameter microhole. When immersed in aqueous solution, the titanate nanosheets exhibit a p.z.c. of − 37 mV, consistent with the formation of a cation conducting (semi-permeable) deposit. With a sufficiently low ionic strength in the aqueous electrolyte, ionic current rectification is observed (cationic diode behaviour). Currents can be dissected into (i) electrolyte cation transport, (ii) electrolyte anion transport and (iii) water heterolysis causing additional proton transport. For all types of electrolyte cations, a water heterolysis mechanism is observed. For Ca 2+ and Mg 2+ ions, water heterolysis causes ion current blocking, presumably due to localised hydroxide-induced precipitation processes. Aqueous NBu 4 + is shown to ‘invert’ the diode effect (from cationic to anionic diode). Potential for applications in desalination and/or ion sensing are discussed. [Figure not available: see fulltext.]. </p

Electroanalysis in 2D-TiO2 Nanosheet Hosts:Electrolyte and Selectivity Effects in Ferroceneboronic Acid – Saccharide Binding

A 2D-TiO2 nanosheet material (as a film deposit of approximately 1 μm thickness on glassy carbon) is employed to host ferroceneboronic acid receptor molecules. It is suggested that the negative surface charge on 2D-TiO2 nanosheets allows weak binding of ferroceneboronic acid, which can then be employed to detect fluoride, glucose, or fructose. The nature of the aqueous electrolyte is shown to strongly affect the ferroceneboronic acid – host interaction. In the presence of di-sodium sulfate stable reversible voltammetric responses are observed. In the presence of fluoride loss of the ferroceneboronic acid occurs probably due to weakening of the boron-titanate interaction. For glucose and for fructose “bound” and “unbound” states of the ferroceneboronic acid are observed as long as fast square wave voltammetry is employed to capture the “bound” state before decomplexation can occur. It is shown that this kinetic selectivity is highly biassed towards fructose and essentially insensitive to glucose.</p