We report the synthesis, morphology, and photophysical properties of new conjugated rod-coil block copolymers consisting of poly2,7-(9,9-dihexylfluorene) (PF) conjugated rods and soft poly(
n
-butyl ...acrylate) (PBA) coils for stretchable light-emitting device applications. The PF-
b
-PBA thin films could form obvious self-assembled nanofibrillar structures after the solvent annealing treatment. Besides this, both the deformability and optical properties of block copolymers were controllable by varying the PF/PBA ratio. The annealed PF
4k
-
b
-PBA
7k
thin film exhibited pure blue emission with a high photoluminescence quantum yield of over 22.5% under 100% strain, validating the excellent stretchability and promising stability. Furthermore, a stretchable and fluorescent PF-
b
-PBA based microporous template with tunable regularity can be fabricated through the breath figure method. These results demonstrated that the novel intrinsically deformable and luminescent rod-coil block copolymers could have versatile applications in stretchable light-emitting devices.
Novel deformable and fluorescent PF-
b
-PBA copolymers with nanofibrillar structures were synthesized for unraveling strain-dependent optical properties.
A comprehensive examination of the synthesis of single-chain nanoparticles (SCNPs) from statistical copolymers of
n
-butyl methacrylate (BMA) and 3-butenyl methacrylate (3BMA),
i.e.
, P(BMA-
co
...-3BMA)s,
via
the intramolecular olefin metathesis reaction under high dilution conditions is described. The olefin metathesis reaction of P(BMA-
co
-3BMA) using Grubbs' 2
nd
generation catalyst in CH
2
Cl
2
efficiently gave the corresponding SCNPs under mild conditions. We achieved the size-controlled synthesis of the SCNPs by adjusting the following factors: (1) the olefin content in the precursor, (2) the molecular weight of the precursor, and (3) the solvent quality of the reaction medium. The hydrodynamic radius and the intrinsic viscosity of the resultant SCNPs were investigated by DLS and viscometric measurements, respectively, which provided further evidence of SCNP formation with controlled diameters. Furthermore, the above-established intramolecular olefin metathesis approach was successfully applied to poly(acrylate), poly(styrene), and poly(ester) precursors, which proved that the present approach could be applied to a wide range of olefin-containing precursors to give SCNPs with various functional groups.
A comprehensive investigation of ruthenium-catalyzed intramolecular olefin metathesis was conducted for establishing a general approach to synthesize size-controlled SCNPs.
Communication between different professions and within the same profession is essential in the execution of tasks for information system development projects and maintenance and operation processes. ...Especially, the accurate transfer of requirements from domain experts to engineers and the sharing of core system knowledge among engineers are crucial activities in system development and maintenance operations. However, when discrepancies occur in these communications, there are times when the detection of such discrepancies is delayed or their presence is only discovered after the completion of the deliverables. These situations can lead to delays in system development, the need for rework, and an increased risk of system accidents. In order to address this issue, this research aims to support the early detection of communication discrepancies faced by BizDevOps teams in web service development. To achieve this, the research adopts reconstructive concept mapping proposed in previous studies and reports the results of its practical application in an actual development.
Network Node Classification Based on DNS Query Analysis Watanabe, Kodai; Sato, Akira; Sannomiya, Shuji ...
Proceedings of the International Conference on Parallel and Distributed Processing Techniques and Applications (PDPTA),
01/2018
Conference Proceeding
The Domain Name System (DNS) is an essential component of the Internet; hence numerous researchers are working on data mining from DNS queries and replies. A local area network (LAN) includes not ...only normal clients and servers but also abnormal nodes, such as malware infected nodes and incorrectly configured nodes. Network administrators want to classify normal nodes and abnormal nodes. This paper proposes a classification method of network nodes though DNS query analysis with machine learning. This method does not use fully qualified domain names (FQDNs) but their hash values for protecting privacy. The proposed method uses conventional DNS record types and novel parameters referred to as pop rate and diff rate in the MeanShift algorithm. Experimental results show that the proposed method can classify the nodes in a LAN into clients and servers.
Recently, the demand of services for architectural space is more increasing due to the diversification and complication of people＇s needs. In this research, it is assumed that the robot will support ...people＇s various needs and people＇s lives in the near future. In this study, the authors investigated the relationship between a robot and a person in quasi space close to actual life space. The authors carried out an experiment to clarify the feelings of worriment due to a robot in the living room in the case of Japanese males. This research aims to establish architecture techniques for robots and humans living together. In this experiment, the robot approached a male sitting on a sofa in quasi space. At different distances between the robot and the male, the subject evaluated his feelings of worriment from ＂no worriment＂ to ＂worriment＂ in five steps from one to five. The robot used in this experiment is middle-sized （380 mm （L） × 380 mm （W） × 350 mm （H））. In this experiment, it is considered that the robot asks for help outside when an emergency occurs. In this experiment, the authors had three situations for the subject： watching television, reading a magazine and just sitting.
Abstract
Coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is currently a serious public health concern worldwide. Notably, co-infection with ...other pathogens may worsen the severity of COVID-19 symptoms and increase fatality. Here, we show that co-infection with influenza A virus (IAV) causes more severe body weight loss and more severe and prolonged pneumonia in SARS-CoV-2-infected hamsters. Each virus can efficiently spread in the lungs without interference by the other. However, in immunohistochemical analyses, SARS-CoV-2 and IAV were not detected at the same sites in the respiratory organs of co-infected hamsters, suggesting that either the two viruses may have different cell tropisms in vivo or each virus may inhibit the infection and/or growth of the other within a cell or adjacent areas in the organs. Furthermore, a significant increase in IL-6 was detected in the sera of hamsters co-infected with SARS-CoV-2 and IAV at 7 and 10 days post-infection, suggesting that IL-6 may be involved in the increased severity of pneumonia. Our results strongly suggest that IAV co-infection with SARS-CoV-2 can have serious health risks and increased caution should be applied in such cases.
A combined method of the Dirac–Hartree–Fock (DHF) method and the reference interaction‐site model (RISM) theory is reported; this is the initial implementation of the coupling of the four‐component ...relativistic electronic structure theory and an integral equation theory of molecular liquids. In the method, the DHF and RISM equations are solved self‐consistently, and therefore the electronic structure of the solute, including relativistic effects, and the solvation structure are determined simultaneously. The formulation is constructed based on the variational principle with respect to the Helmholtz energy, and analytic free energy gradients are also derived using the variational property. The method is applied to the iodine ion (I−), methyl iodide (CH3I), and hydrogen chalcogenide (H2X, where X = O–Po) in aqueous solutions, and the electronic structures of the solutes, as well as the solvation free energies and their component analysis, solvent distributions, and solute–solvent interactions, are discussed.
A theory that includes both relativistic and solvent effects at a high level is crucial to elucidate the structure, properties, and reactions of molecules containing heavy elements in solution. We present a method that combines the Dirac–Hartree–Fock method, a four‐component relativistic electronic structure theory, with the reference interaction‐site model, an integral equation theory of molecular liquids. It thereby reveals the electronic structure, including relativistic effects, and solvation structure of molecules in solution.
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