Inimitable properties of carbon quantum dots as well as a cheap production contribute to their possible application in biomedicine especially as antibacterial and antibiofouling coatings. Fluorescent ...hydrophobic carbon quantum dots are synthesized by bottom-up condensation method and used for deposition of uniform and homogeneous Langmuir–Blodgett thin films on different substrates. It is found that this kind of quantum dots generates singlet oxygen under blue light irradiation. Antibacterial and antibiofouling testing on four different bacteria strains (Escherichia coli, Staphylococcus aureus, Bacillus cereus, and Pseudomonas aeruginosa) reveals enhanced antibacterial and antibiofouling activity of hydrophobic carbon dots thin films under blue light irradiation. Moreover, hydrophobic quantum dots show noncytotoxic effect on mouse fibroblast cell line. These properties enable potential usage of hydrophobic carbon quantum dots thin films as excellent antibacterial and antibiofouling coatings for different biomedical applications.
Carbon nanoparticles are a class of materials with extraordinary properties. In the past three decades, four major types of carbon nanoparticles were synthesized and investigated: fullerenes, carbon ...nanotubes, graphene and carbon quantum dots. One of the main properties of such materials is their hydrophobic nature. At the same time, Langmuir?Blodgett (LB) method the for deposition of thin films of hydrophobic materials provides the possibility to design thin films of different carbon-based nanoparticles with special architectures and features enabling their usage in various fields, particularly in electronics and biomedicine. In this review, the state of art of LB thin films of four types of carbon-based nanoparticles and their application in electronics and biomedicine are presented. The breakthrough in this field was finally achieved by application of carbon quantum dots soluble in solvents optimized for LB deposition.
This paper presents Visper, a novel object-oriented framework that identifies and enhances common services and programming primitives, and implements a generic set of classes applicable to multiple ...programming models in a distributed environment. Groups of objects, which can be programmed in a uniform and transparent manner, and agent-based distributed system management, are also featured in Visper. A prototype system is designed and implemented in Java, with a number of visual utilities that facilitate program development and portability. As a use case, Visper integrates parallel programming in an MPI-like message-passing paradigm at a high level with services such as checkpointing and fault tolerance at a lower level. The paper reports a range of performance evaluation on the prototype and compares it to related works.
The PCG: An Empirical Study STANKOVIC, NENAD; KRANZLMÜLLER, DIETER; ZHANG, KANG
Journal of visual languages and computing,
04/2001, Letnik:
12, Številka:
2
Journal Article
Recenzirano
Process communication graph (PCG) is the visual formalism used in a graph-based visual language (VL) for parallel programming. It combines control flow and data flow graphs into a single visual ...formalism, and supports different levels of abstraction at which parallel programs are expressed and moves to compositional programming. Empirical studies allow designers to put their designs to test in a direct and intentional interaction with users. For research projects this may be the only way to assess if their goals have been met. The case study presented here was conducted on programmers (students) solving parallel programming problems using the PCG formalism to construct parallel programs. The results of this evaluation indicate that users benefit from visual programming, even at the beginning of the learning curve.
Writing and managing programs for parallel systems is a difficult task. It is a great challenge for designers of visual programming languages to provide tools that will help in the process. The paper ...describes a new graph based tool called Visper that provides a multi dimensional environment for program composition. Our approach combines different levels of abstraction at which parallel programs are expressed into a single Process Communication Graph (PCG). PCG visualizes program construction, debugging and performance tuning throughout the development cycle and thus maintains a single mental image for the developer. The paper addresses the issues of visual construction for parallel message passing programs using a working tool Visper.
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