Matsuoka T.,Kurume Institute of Technology |
Matsushima K.,Kurume Institute of Technology
IEEE Region 10 Annual International Conference, Proceedings/TENCON | Year: 2017
Pavement distress detection has significant importance for maintaining and managing roads, and a variety of crack detection methods based on pavement images have been proposed. However, their accuracy is vulnerable to noise on images. In this paper, we introduce the continuity of cracks as one of the features of the cracks into a method using spectral clustering to avoid misdetection caused by noise. The continuity is introduced into affinity matrix. The result of experiment shows the accuracy gets higher by our approach. © 2016 IEEE.
Tanaka H.,Kurume Institute of Technology |
Iishi K.,Kurume Institute of Technology
Desalination | Year: 2017
A single-effect diffusion still, instead of a multiple-effect diffusion (MED) still, combined with a tilted wick (TW) still was investigated experimentally under actual weather conditions to investigate whether the natural convection can transport the vapor from the TW still to an MED still adequately. It was found that the single-effect still can be heated by vapor from the TW still and solar radiation absorbed on the single-effect still. From the experiments in summer and autumn, it was found that an MED still can be heated in both seasons whether the MED still absorbs solar radiation directly or not. The experimental results agreed with the calculation results. The total daily amount of distillate, Σmd,total, did not correlate with the daily horizontal solar radiation, ΣGday, but strongly correlated with daily solar radiation incident on the still, ΣGstill. The maximum of Σmd,total obtained in experiments was about 4.88 kg/m2 day when ΣGday and ΣGstill were 13.6 and 18.4 MJ/m2 day, respectively. © 2016 Elsevier B.V.
Yano T.,Kurume Institute of Technology |
Kuroki Y.,Kurume Institute of Technology
2016 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2016 | Year: 2016
Some of image processing techniques including noise reduction and feature extraction are realized by convolving filters designed for various purposes. A Gaussian filter is a smoothing filter, and is used in various applications such as feature point extraction. However, since coefficients of a Gaussian filter are real numbers, which requires a computational burden especially for large deviation filters. This paper describes an approximation of Gaussian filters using multi-layer convolutions of the basic binomial filter, which is implemented only by an addition and a shift operation. This study also aims at fast implementation with a parallel computing of the binomial filters on GPU (Graphical Processing Units) under CUDA (Compute Unified Device Architecture) platform introduced by NVIDIA corporation. © 2016 IEEE.
Tanaka H.,Kurume Institute of Technology
Desalination | Year: 2016
In this study, a combination of vertical multiple-effect diffusion solar still and tilted wick still is proposed and theoretically analyzed. The vertical multiple-effect diffusion still consists of a double glass cover and a number of vertical and parallel partitions in contact with saline-soaked wicks with narrow air gaps between the partitions. The moisture-rich layers of air in the tilted wick still and the multiple-effect still are connected so that the vapor evaporated from the wick of the tilted wick still can be transported to the humid air layer between the inner glass cover and the first partition of the multiple-effect still by natural convection. The latent heat of condensation of the vapor on the front surface of the first partition can be utilized as an added heat source for the multiple-effect still. It was found that solar energy utilized in the multiple-effect still would be adequate year-round. The total daily distillate production was predicted to be about 19.2, 16.0 and 15.9kg/m2day on the spring equinox and summer and winter solstices, respectively, when the diffusion gaps between partitions is 5mm and the number of partitions is 10. © 2015 Elsevier B.V.
Tanaka H.,Kurume Institute of Technology
Alexandria Engineering Journal | Year: 2016
A thermal distillation system utilizing a part of the thermal energy of biomass burned in a stove during cooking is proposed. The thermal energy is transported from the stove to the distiller by means of a heat pipe. The distiller is a vertical multiple-effect diffusion distiller, in which a number of parallel partitions in contact with saline-soaked wicks are set vertically with narrow gaps of air. A pilot experimental apparatus was constructed and tested with a single-effect and multiple-effect distillers to investigate primarily whether a heat pipe can transport thermal energy adequately from the stove to the distiller. It was found that the temperatures of the heated plate and the first partition of the distiller reached to about 100. °C and 90. °C, respectively, at steady state, showing that the heat pipe works sufficiently. The distilled water obtained was about 0.75 and 1.35. kg during the first 2. h of burning from a single-effect and multiple-effect distillers, respectively. © 2016 Faculty of Engineering, Alexandria University.
Inoue T.,Kurume Institute of Technology |
Monde M.,Saga University
International Journal of Heat and Mass Transfer | Year: 2012
Nucleate pool boiling heat transfer coefficients of ammonia/water mixtures were measured at a pressure of 0.4 MPa on a horizontal heated fine wire having a diameter of 0.3 mm. The nucleate pool boiling aspects were observed, after the addition of a surface-active agent to the mixtures. The effects of the concentrations of ammonia and the surface-active agent on the coefficients were clarified experimentally for the ammonia fraction range 0.1 ≦ C ≦ 0.9 and surfactant concentration range 0 ≦ C S ≦ 3500 ppm. The results showed that the coefficients were enhanced at C ≦ 0.5 and in low heat flux ranges just after the onset of boiling. It was also found that the enhancement effect caused by the surfactant disappeared at surfactant concentrations of more than 1000 or 1500 ppm. © 2012 Elsevier Ltd. All rights reserved.
Fukuda K.,Kurume Institute of Technology
Society and Animals | Year: 2016
This article describes how livestock farmers respond to moral enquiries about their means of livelihood, by referring to ethnographic data collected in the Scottish Borders. The focus is on three controversial aspects of livestock farming: welfare issues of intensive farming methods, guilt about depriving nonhuman animals of their lives for food, and the moral dilemma of breeding and rearing animals merely to be killed. There was a feeling of uneasiness among farmers about sending the animals they looked after to the slaughterhouse. This, however, was rationalized with the recognition that livestock were bred and reared to be eaten in the first place. By examining farmers' utterances, it is suggested that livestock farmers are conditioned to consider their vocation as a part of the social system, over which they have little control. © 2016 Koninklijke Brill NV, Leiden, The Netherlands.
Ishi-I T.,Kurume Institute of Technology
Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry | Year: 2016
This review describes the systematic study on the red light-emitting behavior of a series of donor-acceptor-type dyes containing a strong acceptor moiety such as benzothiadiazole, naphtho-bisthiadiazole, bisthiadiazoloquinoxaline, and hexaazatriphenylene. Donor-acceptor conjugation is one of the simplest strategies for generating longer-wavelength emissions including red light emission. With the increase in the strength of donor-acceptor conjugates, the emission band shifts bathochromically, producing red light emission. However, the efficiency of red light emission decreases to show the quenching in polar aqueous media, because a highly polarized excited state arising from the donor-acceptor characteristic increases the formation of a nonradiative deactivation channel. An efficient red light emission can be achieved in the aggregation of the donor-acceptor dyes even in polar aqueous media. The formed aggregate provides a less polar hydrophobic space inside the aggregate structure, by which the quenching is restricted, leading to the reduction of the nonradiative deactivation rate.
Ichimasa R.,Kyushu University |
Nakamura R.,Kyushu University |
Nakamura R.,Kurume Institute of Technology |
Hashimoto M.,Kyushu University |
Arai K.,Kumamoto University
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2014
Comparing the latest observed abundances of He4 and D, we make a χ2 analysis to see whether it is possible to reconcile primordial nucleosynthesis using the up-to-date nuclear data of NACRE II and the mean life of neutrons. If we adopt the observational data of He4 by Izotov et al. [Astron. Astrophys. 558, A57 (2013)], we find that it is impossible to get a reasonable agreement with the standard big-bang nucleosynthesis. However, by including degenerate neutrinos, we succeed in obtaining consistent constraints between the neutrino degeneracy and the baryon-to-photon ratio from a detailed comparison of calculated abundances with the observational data of He4 and D: the baryon-to-photon ratio in units of 10-10 is found to be in the range 6.02η10 6.54 for the specified parameters of neutrino degeneracy. © 2014 American Physical Society.
Ide J.-Y.,Kurume Institute of Technology
European Journal of Entomology | Year: 2014
Mated females of the small copper butterfly Lycaena phlaeas avoid harassment by males by closing their wings and concealing themselves when in the proximity of a con-specific butterfly. This wing-closing behaviour is less frequently exhibited by virgin females that are two days old or older (i.e., potentially receptive) than by mated females. During the first 2 days after emergence, females of L. phlaeas are sexually immature and unreceptive. To determine whether recently emerged virgin females try to avoid male harassment, age-related changes in the frequency of harassment-avoidance behaviour of virgin females were investigated. On the day of emergence, a high percentage of virgin females exhibited wing-closing behaviour. Over the following 2 days, however, the frequency of this behaviour declined sharply and then reached a constant low level. This observation supports the idea that the harassmentavoidance behaviour exhibited by virgin females of L. phlaeas depends on their receptivity.