2025
22-24 January
Bachelor student
Y. Nozawa participated to the winter meeting of the Vision Society of Japan
VSJ2025 Winter. He presented a posters with the title: "
Stream/bounce effect in virtual reality: Effects of audiovisual cross-modality on the bounce illusion" by
Y. Nozawa and R. Micheletto,
pic1,
pic2.
6 January
PhD candidate
K. Oikawa participated to Kansai Young Scientists Meeting of Plasmonics (
link) with a short presentation. He introduced the blinking phenomenon in nitride semiconductors.
The list of the participants to the workshop is
here
2024
9 December
PhD candidate
Kotaro Oikawa published the research "
Correlated photoluminescence blinking phenomenon on InGaN/GaN nanopillar structures", by K. Oikawa, K. Okamoto, M. Funato, R. Kawakami and R. Micheletto. The article was featured on the
Applied Physics Letter cover !
He reported that light-emitting devices using the wide bandgap properties of InGaN/GaN show photoluminescence (PL) inhomogeneities and blinking even in high-quality samples. The blinking phenomenon, where PL intensity varies over time under photoexcitation, has been observed in quantum dots and quantum wells, but K. Oikawa for the first time focused on nanopillar InGaN quantum wells, a much less studied structure. He found that the blinking of spatially separated nanopillars shows long-term synchronization, not due to random fluctuations but likely caused by an intriguing nonlinear response to UV excitation. He have shown that when stimulation intensity exceeds a certain threshold, it triggers ON/OFF state changes in the photoluminescence. Mr. Kotaro Oikawa findings offer preliminary insights into the blinking optical phenomenon that can help to realize better devices and improve the knowledge of the physics of wide band-gap materials.
4-6 December
Prof.
R. Micheletto was invited to the
Osaka Municipal University to give a series of classes in an
intensive course with the title
Cognitive Informatics based on his text book "Cognitive informatics in English and Japanese" (
link). The course was given at the
Graduate School of Engineering Division of Physics and Electronics under the invitation of prof.
Okamoto Koichi. Here is a picure of prof. Micheletto with his long time friend Koichi
pic1 at a dinner party with prof. K. Wada, prof. T. Matsuyama and PhD candidate K. Oikawa, here is a shot during the class
pic2.
3-8 November
PhD candidate
Kotaro Oikawa and prof.
R. Micheletto participated to the
12th International Workshop on Nitride Semiconductors (IWN2024). They presented two posters with the title "
Correlated photoluminescence blinking phenomenon on InGaN nanopillars structures" (K. Oikawa, K. Okamoto, M. Funato, Y. Kawakami and R. Micheletto), and "
First principles study of calcium in Wurtzite GaN" (K. Oikawa, R. Micheletto).
The research concerned the photoluminescence of nano-pillars of InGaN material. We found that the flashing of these pillars has a very obvious temporal correlation that is difficult to explain by standard quantum physics; this research was reported by Kotaro Oikawa and appeared on the cover of Applied Physics Letters (
link to article). The blinking and optical instability phenomena on the photoluminescence of InGaN are presumed to be caused by impurities and vacuities in the Wurtzite crystal. The second poster reports ab-initio studies of the effects of calcium on the electronic properties of InGaN. Here is the poster presented by R. Micheletto:
poster (a giant "thank you" goes to Dr. Giovanni Alfieri of Hitachi Energy).
The conference was located on an extremely beautiful place, the Hilton Village in Honolulu. Here is some pictures of the event: the venue
pic, PhD candidate Kotaro Oikawa
pic and prof. R. Micheletto
pic.
11-13 September
Master student
T. Kono participated to the 34th Annual Meeting of the Japanese Neural Network Society
JNNS2024. He presented a posters with the title: "
A study on the neural basis of the vanishing illusion based on the V1 saliency hypothesis " by
T. Kono, S. Yoshida and R. Micheletto.
This is the official program of the meeting
pdf.
7-8 June
PhD candidate
Kotaro Oikawa participated to the 20th Plasmonics Symposium (
link) with a poster with the title "
Study on instability blinking phenomena in nitride semiconductor nano-scale structures " by
K. Oikawa, K. Okamoto and R. Micheletto.
17-22 May
PhD candidate
Kotaro Oikawa participated to the annual international conference of the Vision Sciences Society with a poster with the title "
A study of critical fusion frequency and duty ratio with
multiple light stimuli".
His study focused on the perception of flickering stimuli that stimulate the CFF phenomenon. His previous results have shown that by measuring the duty ratio dependence of CFF in detail, the profile of the CFF has an asymmetric characteristic curve. In this study, he examined the effect of multiple flashing stimuli on the CFF-duty ratio profile. He discovered that the asymmetry of the CFF-duty ratio profile tended to mitigate to symmetry in the 3x3 grid stimulus compared to previous experiments with a single LED flashing stimulus. He also created a theoretical model based on biologically known eye parameters, calculated the contrast from the signal perceived on the retina and simulated the CFF at a certain threshold value. The conference is located in a very beautiful place in Florida:
pic1,
pic2,
pic3!!
2023
12-17 November
Master student
S. Yoshida participated to The 14th International Conference on Nitride Semiconductors. He presented a posters with the title: "
Time-correlated Luminescence Blinking in InGaN Single Quantum Wells" by
S. Yoshida, G. Alfieri and R. Micheletto.
18-20 September
Master student
T. Kono participated to the summer meeting of the Vision Society of Japan
VSJ. He presented a posters with the title: "
Quantitative Measurement of Visibility in Vanishing Visual Illusions with Motion" by
T. Kono, S. Yoshida and R. Micheletto.
4-6 September
Master student
S. Yoshida participated to the 33rd Annual Meeting of the Japanese Neural Network Society
JNNS2023. He presented a posters with the title: "
Surround Suppression in the Mouse Primary Visual Cortex " by
S. Yoshida, Z. Sun and R. Micheletto.
May 26
Giovanni Alfieri of Hitachi Energy: Lenzburg, CH, Yusuke Fujii and Ruggero Micheletto published "
An ab initio study of the electronic properties of helium in wurtzite gallium nitride", published on
Semiconductor Science and Technology number
38 reference page 074003618 (
doi).
Using ab-initio calculations on the Cray XC50 supercomputer in Yokohama, they carried out a density functional theory study of substitutional He and related complexes (vacancies and dopants) in wurtzite GaN.They found for the first time that He is unstable at N-sites, moving to interstitial sites and forming a N vacancy (VN). This was observed for the case of substitutional He and for He complexed with n- or p-type dopants. The formation of VN, in such defects, gives rise to donor states close to the valence band edge (EV). On the other hand, they understood that the presence of a gallium vacancy leads to the formation of an energetically stable complex that gives rise to acceptor states close to the conduction band edge (EC).
May 19-24
PhD candidate
Kotaro Oikawa participated to the annual international conference of the Vision Sciences Society with a poster with the title "
An experimental and theoretical study of the critical fusion frequency as a function of stimulus duty ratio". The abstract of his work has been published on
Journal of Vision vol
23, issue 9 (
doi).
His study focused on the perception of flickering stimuli that stimulate the CFF phenomenon. Specifically, he measured CFF values as a function of the duty ratio of the light source in greater detail than in previous studies. He discovered for the first time that CFF decreases rapidly when the duty ratio is above 80% (lighting duration). He also created a theoretical model based on biologically known eye parameters, calculated the contrast from the signal perceived on the retina and simulated the CFF at a certain threshold value. The conference is located in a very beautiful place in Florida:
pic !!
April 24
Master M2 student
Yoshida Shunra together with Yusuke Fujii, and Dr. Alfieri Giovanni published a study with the title "
Time-correlated luminescence blinking in InGaN single quantum wells", by S. Yoshida, Y. Fujii, G. Alfieri and R. Micheletto. Published on
Applied Physics Letters number 122, reference page 173506 (
doi).
They studied how the blinking phenomenon in InGaN single quantum wells changes over time. They used two InGaN single quantum well samples, and confirmed that the luminescence intensity fluctuates in localized blinking regions. They found that these optical variations are not random but are instead correlated in pairs, with either positive or negative coefficient, to a distant reference blinking point. Mr. Yoshida realized a simple phenomenological model that shows how charge carriers are exchanged among pairs of adjacent opposite correlation regions. As a result, he suggested that the phenomenon is caused by fluctuations in the number of these exchanged carriers.
29 March
Ph.D. candidate
Marcello Salustri together with Master student Yoshida Shunra, and R. Micheletto published a study with the title "
Neural and axonal heterogeneity improves information transmission", by Marcello Salustri, Shunra Yoshida and Ruggero Micheletto. Published on
Physica A: Statistical mechanics and its applications number 618, reference page 128627 (
doi).
They simulated, at different scales, the spiking activity on a toroidal neural network realized in multiple dimensions with varying degrees of heterogeneity using the biological compatible Izhikevich neuron model. They found that increasing the heterogeneity and network dimension improved the robustness and propagation speed of the spiking activity. Their results demonstrate that the behavior of the spiking activity depends on both the cellular neural and axonal delay heterogeneity. They put down a simple theoretical framework compatible with the results of the simulations, a novel method to strategically analyze any similar networks.
8-9 March
Master student
Shunra Yoshida was invited to give a talk at the Conference on applied (bio) geochemistry
CAG2023 that was held in Fkih Ben Salah,
Morocco.
His presentation was done remotely since the conference was hybrid, partially online, partially in presence. The title of his talk was
Temporal correlation in InGaN quantum wells, a work based on studies made with Yusuke Fujii and prof. R. Micheletto.
This is the abstract of the presentation
link and a certificate of his presentation
link.
2022
7-9 December
Prof.
R. Micheletto was invited to the
Osaka Municipal University to give a series of classes in an
intensive course with the title
Cognitive Informatics based on his text book "Cognitive informatics in English and Japanese" (
link). The course was given at the
Graduate School of Engineering Division of Physics and Electronics under the invitation of prof.
Okamoto Koichi. Here are some picures of prof. Micheletto with his long time friend Koichi
pic1,
pic2,
pic3. Here at dinner with professors Kenji Wada and Tetsuya Matsuyama
pic4.
5-9 September
Master student
Yoshida Shunra and R. Micheletto participated to the annual conference of the
Vision Society of Japan with a research titled "
Toward Video Communication under Low Bandwidth A Study on Compression and Restoration by Sampling Based on Visual Characteristics" realized in collaboration with
Sun Zhe and the group of
Hideo Yokota. The poster summarizing the research is
here (in Japanese).
The home page of the conference is
here.
Mister Yoshida realized a novel method to combine visual characteristics of an image, with its saliency map. He used error diffusion dithering process based compression and a framework for restoration from prior information only.
The method he proposed and the random cases are compared in terms of PSNR and SSIM. He found that his method outperforms the random case in both metrics.
Here is a picture of Mr. Yoshida in front of his poster explaining the details of his research
pic. Here a picture of a dinner with Mr. Yoshida Shunra, profs Hideo Yokota, Sun Zhe and R. Micheletto
pic. Here R. Micheletto with prof. Sun Zhe in front of the conference logo
pic.
1 September
Master student
Yoshida Shunra published a study with the title
The influence of water and ethanol adsorption on the optical blinking in InGaN quantum wells with the collaboration of Fujii Yusuke, Alfieri Giovanni and Ruggero Micheletto (
link).
He found that the blinking of InGaN material is strongly influenced by the presence of water. Especially he found that ethanol and water enhance the blinking a lot.
He also found a way to show the differences in blinking intensity using in an original way cumulative histograms and seigmoid functions.
With the help of Dr. Alfieri, he also developed a qualitative explanation of the physical mechanisms related to liquid enhanced blinking.
15 June
Ph.D. candidate
Marcello Salustri and R. Micheletto published the study titled "
Heterogeneous Axonal Delay Improves the Spiking Activity Propagation on a Toroidal Network" (
link),
Cognitive Computation, Springer Nature, https://doi.org/10.1007/s12559-022-10034-2.
The work shows how, in a neural network, spatial heterogeneity favours faster propagation of spike signals. The heterogeinity studied is not relative to the type of neuron or to the stimulations, but to the axonal transmission delays between neurons. That is, in the artificial neuronal grid studied, the position of the neurons have a certain degree of randomnes. In the 400 neurons grid, only one is stimulated (called
initiator) with constant current. All the others become active because they are connected to a von Neumann neighborhood, that ultimately reach the initiator. This study is in line with many studies that suggest that noise and chaos in neural networks improves information flow, and for the first time it extends this concept to inter-neuron axonal delay (a paradigm for inter-neuron distance).
8 Apr
Kahoko Takahashi (now at the
Network Innovation Laboratories, NTT Japan), together with a team of scientists from Japan, China, Spain, United Kindom and Russia, realized a novel methodology to augment the efficiency and usability of EEG data.
With the help of prof. R. Micheletto they published a paper with the title "
Data augmentation for Convolutional LSTM based brain computer interface system", by Kahoko Takahashi, Sun Zhe, Jordi Solé-Casals, Andrzej Cichocki, Anh Huy Phan, Hui-Hai Zhao, Shangkun Deng and
Ruggero Micheletto. Published on
Applied Soft Computing number 122, reference page 108811 (
doi).
14 Jan
Prof.
R. Micheletto contribuited to the research "
Hiding the Rabbit: Using a genetic algorithm to investigate shape guidance in visual search", by Avi M. Aizenman, Krista A. Ehinger, Farahnaz A. Wick, Ruggero Micheletto, Jungyeon Park, Lucas Jurgensen and Jeremy M. Wolfe. The paper is published on the
Journal of Vision (
link,
PDF).
This work was initially developed in
Harvard Medical School under the supervision of prof.
Jeremy M. Wolfe. A novel genetic algorithm method was used to explore shape space and to stimulate hypotheses about shape guidance. Initially, observers searched for targets among 12 random distractors defined by the amplitude and phase of 10 radial frequencies. Reaction time (RT) was the measure of "fitness". The genetic algorithm was used to evolve toward an easier search task, distractors with faster RTs survived to the next generation, "mated" and produced offspring (new distractors for the next generation of search). To evolve a harder search, surviving distractors were those yielding longer RTs. Within eight generations of evolution, the method succeeds in producing visual searches either harder or easier than the starting search. This is a novel agnostic (doesn't require specific theory) methodology to find hard/easy shapes processed by the human visual system.
2021
7-9 July
Prof.
R. Micheletto was invited to the
Osaka Prefecture University to give a series of classes in an
intensive course with the title
Cognitive Informatics based on his text book "Cognitive informatics in English and Japanese" (
link). The course was given at the
Department of Electronics, Mathematics and Physics under the invitation of prof.
Okamoto Koichi. Here is a picure of prof. Micheletto with his long time friend Koichi
pic.
23 January
Prof.
R. Micheletto contribuited to the research "
Deep levels in ion implanted n-type homoepitaxial GaN: Ion mass, tilt angle and dose dependence", by G. Alfieri, V.K. Sundaramoorthy and R. Micheletto. The paper is published on the
Nuclear Instruments and Methods in Physics Research (
link).
This work was realized by Dr. G. Alfieri (Hitachi Power Grids, Lenzburg, Switzerland) carrying out an electrical characterization study of defects in ion implanted n-type GaN. Several new defects were found below the conduction band edge and the nature of these defects is discussed in the manuscript with the aid of Monte Carlo collision simulations.
22 January
Master student
Yusuke Fujii did a presentation at the conference "nano-optics research group" (
link) with the participation of top level international researchers in Japan. His presentation title was "
Research on optical blinking in InGaN/GaN single quantum wells" by Fujii Y. G. Alfieri and R. Micheletto. The slides of his presentation are
here (Japanese, PDF, 1.7 Mb).
20-22 January
Master student
Akira Hirai partecipated to the winter edition of the Japanese
Vision Society meeting 2021. He also gave an oral presentation with the title "
Visual search using VR environment and mathematical analysis of eye-gaze tracking data", by Akira Hirai and Ruggero Micheletto (
PDF in English, 5.5 Mb).
2020
15 September
Master student
Yusuke Fujii contribuited to the research "
The Electronic Properties of Chlorine in GaN: An Ab Initio Study", by Y. Fujii,
R. Micheletto and
G. Alfieri. The paper appears on the journal Physica Status Solidi (b), published by Wiley " (
link).
He contributed collaborating with Dr. G. Alfieri (Hitachi Power Grids, Lenzburg, Switzerland) with the ab-initio calculations and the density functional theory. It was found that Cl and its complexes explain the reported effects of Cl-RIE treated GaN on hole density and ohmic contact resistivity.
This result is very important because Chlorine-based reactive ion etching (RIE) is a fundamental processing step for the manufacturing of next generation GaN semiconductor devices.
28 May
Prof.
R. Micheletto, prof.
Aki Tosaka and
Kotaro Oikawa published "
Cognitive Informatics in English and Japanese", edited by
Kyoritsu Publishing, Tokyo, Japan. This is the textbook of prof. Micheletto autumn course "Cognitive Informatics" at YCU undergraduate school.
This books gives the
big picture vision of the principles by wich the brain works from the physicist point of view.
It introduces human perception, neural networks and the basics of artificial intelligence with hands-on programming examples in python and Octave language.
This book is written in English with parallel translation in Japanese on adjacent pages.
2019
24 December
Prof. R. Micheletto and Master Student
Yusuke Fujii visited
Kyoto University department of Electronic Engineering. Y. Fujii made an informal colloquium with prof.
Yoichi Kawakami about his research on the blinking phenomena in InGaN materials.
12-14 June
Prof.
R. Micheletto was invited to the
Osaka Prefecture University to give a series of classes in an
intensive course with the title
Cognitive Informatics based on his text book "Cognitive informatics in English and Japanese" (in print). The course was given at the
Department of Electronics, Mathematics and Physics under the invitation of prof.
Okamoto Koichi. Here is a picure of prof. Micheletto at a dinner with prof. Okamoto and other Department leaders
pic.
16-22 May
Master student K Konno and
R. Micheletto participated to the Vision Science Society annual meeting
VSS 2019.
Kazuki Konno presented a poster with the title "
What are the features of shapes easy to remember in the visual search?" by
K. Konno and R. Micheletto.
The poster is available here:
1. This is a pictures of him at the poster presentation:
pic and here a picture at work at the "demo night" event of the conference
pic.
2018
30 November
Master student
Kahoko Takahashi contribuited to the book "
Intelligent Computing", edited by K. Arai, K. Kohei, B. Supriya and R. Bhatia, published by Springer.
She contributed to the research article "
Using a Hierarchical Temporal Memory Cortical Algorithm to Detect Seismic Signals in Noise" by
R. Micheletto, Kahoko Takahashi and A. Kim. This work is part of the Proceedings of the 2018 Computing Conference held in London, GB (10-12 July 2018).
A quasi final version of the paper is here (
link), while the final book version is online at Springer's
link.
12 November
B4 student
Yusuke Fujii contribuited to a research presented at the International Workshop on Nitride Semiconductors (
IWN 2018) held in Kanazawa, Japan. The presentation title was "
Ab Initio Study of Substitutional Chlorine and Related Complexes in GaN" by Giovanni Alfieri, Yusuke Fujii and
R. Micheletto. It was summarized in a poster (
pdf) and abstract (
pdf).
24-27 October
Prof. R. Micheletto and master student
Kahoko Takahashi participated to The 28th Annual Conference of the Japanese Neural Network Society (JNNS2018). She delivered a poster talk with the title
Empirical mode decomposition for improved EEG signal classification with Convolutional Neural Network in Brain-Computer interface experiments by Kahoko Takahashi, Sun Zhe, Jordi Sol-Casals, Andrzej Cichocki, Anh Huy Phan and
R. Micheletto. She also published a research abstract with the same title
pdf.
Kahoko Takahashi together with
Dr. Sun Zhe (former Micheletto laboratory member, now at RIKEN) and other coauthors worked in the field of Brain-Computer interfaces. They studied the detection of EEG brain signals and developed an elaboration using an original Convolutional Neural network. In particular, she demonstrated that with the use of advanced mathematical techniquels like Empirical Mode Decomposition, it is possible to improve detection and reduce the number of actual experiments needed for the training of the network.
5 October
Prof. Cristiano Giordani published:
Simulation of the song motor pathway in birds: A single neuron initiates a chain of events that produces birdsong with realistic spectra properties by C. Giordani, H. Rivera-Gutierrez, Sun Zhe and
R. Micheletto,
link.
The neural pathway simulates the complete neural structure with few neurons, but it is able to reproduce recognizable bird sounds, here is an example in wave format
audio. In this
video the spontaneously emerging
live dynamics of the network is noticeable (blocks hight represents membrane potential, the two rings the HVCs and RAs clusters and the horizontal block extension is the syrinx pressure). This study confirms experiments on animals and on humans, where results have shown that single neurons are responsible for the activation of complex behavior or are associated with high-level perception events.
30 August
The work of Tsutsumi Toshiaki,
R. Micheletto, G. Alfieri and Y. Kawakami "The relation between optical instabilities and absorbed materialg
in photoluminescence with [0001] InGaN single quantum well" has received an
in-text citation in AIP Advances! In-text citation are like
uber-citations, it means that the study has not only being read, but that it is
deeply influential on other researcher, to the level that they felt the need to mention it directly in their report.
This is a link to the in-text citation pdf.
3 August
Master student
K. Konno participated to the summer meeting of the Vision Society of Japan
VSJ. He presented a posters with the title: "
Influence on the Speed and Space Perception using Optical Illusions" by
K. Konno and R. Micheletto.
The poster is available here: poster (Japanese).
10 July
Prof.
R. Micheletto contributed to the book
Future courses of Human Societies with a chapter "
Nanotechnology and future technological evolutions". This books is about the long-term future evolution of human society from multiple points of view.
Different chapters approach the influcence of different technologies on societies of the
far future. Chapters are written by prominent scientists and researchers all over the world that are experts in the field. For example Dr.
Claudio Capiglia, prof.
Junichiro Fukai, prof.
Vesselin Popovski and many others.
The volume is edited by prof.
Kleber Ghimire who teaches topics related to Social Economy in YCU and contributed to the first chapter of the book "
Future as an object of enquiry".
The book is published by the
Taylor and Francis group and here is a
link to the page describing the book.
24 May
Dr.
Giovanni Alfieri (Ph.D. at ABB Corporate Research, Switzerland) published "
Electrically active point defects in Mg implanted n-type GaN grown
by metal-organic chemical vapor deposition" by G. Alfieri, V. K. Sundaramoorthy, and
R. Micheletto.
The paper demonstrates for the first time the presence of at least nine electrically active levels in Mg implanted GaN. These defects are located below the conduction band edge, and their possible microscopic structure was discussed in the light of previous DFT simulations and other results in literature (
link).
18-23 May
Prof.
R. Micheletto participated to the Vision Science Society annual meeting
VSS 2018. In collaboration with his Master student
Kazuki Konno and graduated
Tomoharu Nagahama he presented two posters. The first with the title "
Psychophysical influence of visual perception on person's behavior using optical illusions in a background" by
K. Konno and R. Micheletto, the secondo one with title "
Virtual Reality study of the influence of environment color and luminosity in depth perception " by T. Nagahama and R. Micheletto.
The poster are available here: 1 and 2. This is a pictures of prof. Micheletto at the poster presentation: pic.
17 May
Master Student
Kahoko Takahashi participated to the "
SSA 2018", the Seismological Society of the Americas annual meeting. She presented a work with the title "
Detection of seismic signals under low SNR condition using an artificial neural network: toward the development of a dense low cost citizen seismic network in Japan" by K. Takahashi, H. Uematsu, Sun Zhe, R. Micheletto and A. Kim (
poster). In the same meeting prof. Micheletto presented a poster with the title "
Detection of Background Seismic Waves Anomalies With a Hierarchical Temporal Memory (HTM) Cortical Algorithm" by R. Micheletto and K. Takahashi (
poster). In this work prof. Micheletto addresses the possibility to use innovative
Hyerarchical Temporal Memory algorithms to detect anomalies deeply embebbed in seismic signals noise (some introductory material about this research is
here).
For her work Miss Takahashi got a Travel Grant prize (
pic) !
26 March
Prof
R. Micheletto was interviewed by the Italian
National TV !! Here is a link to the
video (in Italian, but you can watch it!).
Prof. Micheletto briefly describes his research topics in YCU.
Two students of prof. Micheletto's laboratory
Nagahama Tomoharu and
Ishizuka Ayaka collaborated to the realization of the film. There is a brief appearance of the cat
Chaby too!
The interview was realized by Director
Michele Cinque.
for OLDER NEWS (~2017) click here
2017
29 November
Master Student
Kahoko Takahashi won the "
Best Presentation Prize" at the 2017 meeting of the Seismological Society of Japan (
SSJ). Under the direction of prof.
Ahyi Kim she presented a new methodology for a dense and low-cost
citizen seismic network in Japan. They are developing an innovative hardware based on efficient, small and low-priced seismic sensor coupled with a miniature computer.
This device is revolutionary because it should be placed not in dedicated laboratories, but in citizen houses or public places. A LAN connection allows communication to a central server that gathers data with the aid of an advanced neural network algorithm for precise and reliable detection.
For this project prof. Ahyi Kim group was already awarded a Yahoo Japan! "Internet of Things" prize and a "Novelty Goods" prize (see
here).
The study exact data are these: title "Development of a low Signal/Noise ratio seismic device using an Artificial Neural Networks" by T. Takahashi, M. Matsumoto, T. Uematsu, R. Micheletto and A. Kim, The Seismological Society of Japan 2017 Fall Meeting, October 25-27, Kagoshima, Japan (2017), presentation code:
S02-P04.
26 September
Dr. Kentaro Takatori (Ph.D. at Tokyo Institute of Technology) and Dr. Takayuki Okamoto (
Advanced Devices Laboratory, Riken) published "
Surface exciton polaritons supported by a J-aggregate-dye/air interface at room temperature" by K. Takatori, T. Okamoto, K. Ishibashi and
R. Micheletto.
The paper introduces a new method to realize devices based on surface polariton exitons in a straightforward way at room temperature (
*).
19-24 May
Prof.
R. Micheletto participated to the Vision Science Society seventeenth annual meeting
VSS 2017. He presented a work on cross-modal codification of images with sounds. The title of the poster presentation is "Cross-modal codification of images with auditory stimuli: a language for the visually impaired" of T. Kishino, Sun Zhe, R. Marchisio and
R. Micheletto. This study is also summarized in a manuscript currently available in
arXiv database.
Some pictures of the conference are here:
pic (with prof.
Igor Utochkin),
pic (with prof.
Jeremy Wolfe).
13 April
Prof.
Mario D'Acunto published
"Near field surface plasmon enhancement induced by rippled surfaces" by M. D'Acunto, F. Fuso,
R. Micheletto, M. Naruse, F. Tantussi and M. Allegrini, on the
Journal of Nanotechnology (here:
link). The article was the result of a collaboration with a bilateral Italy-Japan project also in cooperation with prof.
R. Micheletto.
24 March
Ph.D. candidate
Sun Zhe becomes doctor ! He was selected as best PhD of the year to receive the PhD directly from our dean prof.
Kubota (here is a video of him receiving the price:
video). His
PhD thesis was about advanced and innovative neural networks and brain theory. Also he was working in the project of prof. Ahyi Kim and worked on the Citizen Seismic Network, an original collective low cost system to detect seismic waves in a distrubuted network helping them to win the
Yahoo! Japan "Novelty goods" research
prize !
Here are some other pictures of the PhD cerimony event: here with interfaculty Research director prof. Tachibana, and prof. Takayama
pic1, with prof. Tachikawa and prof. Oikawa, head and vicehead of the Graduate School:
pic2. Here Dr. Sun Zhe is in Riken with prof Cichocky
pic3 that helped in the supervision and management of his research. Prof. Cichocki is the head of the
Advanced Brain Signal Processing laboratory in Riken.
22-24 March
Prof.
R. Micheletto chaired the session
"Chemical Sensors and Optical Sensors" of the BIT's 5th
AnalytiX international conference. The conference was held in Fukuoka Japan. He also gave a talk with the title "Optical Sensing at Critical Angle". Here is a
link to the conference, where
program and other details are available.
10 February
Master student
Takahashi Kahoko got a special prize for her "best graduation presentation" in the department of Science.
She was working in the project of prof. Ahyi Kim and worked on the Citizen Seismic Network, an original collective low cost system to detect seismic waves in a distrubuted network.
For her work she was awarded two prizes (!) The
Yahoo! Japan "Novelty goods" prize and the "Internet of Things"
IoT prize. She used neural negtworks to optimize and improve the seismic network in collaboration with Dr. Sun Zhe and prof. R. Micheletto.
Here are some other pictures of the event (
pic1,
pic2).
15 January
Master student
Toshiaki Tsutsumi published:
Applied Surface Science The relation between photoluminescence properties and gas pressure with [0001] InGaN single quantum well systems by T. Tsutsumi, G. Alfieri, Y. Kawakami and R. Micheletto, number
392, 256-259 (2017).
Here is a
link to the article.
2016
Our university classified
16th in the world as
best university with less than 5000 students. We are number one in Japan as multi discipline university in the same ranking.
Here is a
link to an article speaking about this.
4-8 Sept
Tokyo Institute of Technology Ph.D. candidate
Kentaro Takatori participated to the 14th International Conference of Near-Field Optics, Nanophotonics and Related Techniques
NFO-14 in Act City, Hamamatsu, Japan. He presented a work with the title "Indium-free organic solar cells using a plasmonic electrode" by K. Takatori, T. Nishino, T. Okamoto, H. Takei, K. Ishibashi and
R. Micheletto, about a new technique to realize electrodes for organic solar cells.
5 August
Teaching assistant and Ph.D. candidate
Sun Zhe participated to the 13th Annual Meeting
AOGS 2016. Sun Zhe presented a work on constructing disaster mitigation community sensor network in Yokohama, Japan. This work was realized in cooperation with Ahyi Kim lab. See abstract
here or download
here.
1 August
Teaching assistant and Ph.D. candidate
Sun Zhe published:
Nonlinear phenomena in complex systems Non-linear and threshold effects of synaptic connectivity on the correlation parameter of a system of two coupled neurons. by S. Zhe and R. Micheletto, number
19, number 2 (2016).
Here is a
link to the article.
1 June
Teaching assistant and Ph.D. candidate
Sun Zhe published:
Journal of Physics A: Mathematical and Theoretical Noise influence on spike activation in a Hindmarsh-Rose small-world neural network by S. Zhe and R. Micheletto, number
49, number 28 (2016).
Here is a
link to the article.
23 May
Teaching assistant and Ph.D. candidate
Sun Zhe contributed to the
Japan Geoscience Union Meeting 2016. He worked on a research with the title "Development of the seismic signal detection method under low SNR condition using an artificial neural network". This work was realized in cooperation with Ahyi Kim lab. See abstract
here or download
here.
13-18 May
Teaching assistant and Ph.D. candidate
Sun Zhe and prof.
R. Micheletto participated to the Vision Science Society sixteenth annual meeting
VSS 2016. Sun Zhe presented a work on the effect of perception of ambiguous pictures on Electro Encefalograms, detecting a novel N250 type signal during percept inversion, see abstract
here and the poster
here.
Prof. Micheletto presented a poster on the analysis of visual search of a target among random generated distractors. His results suggest that pre-attentive features in the target have a role in good distractors shapes and used an advanced computer vision technique (Generalized Hough Transform) to evaluate the presence of target features in distractors. See the abstract
here, some supplemental material
here and the poster
here.
Some pictures of the event are at these links: prof. Jeremy Wolfe presentation
pic1, prof. Micheletto at his poster
pic2 and Ph.D. candidate Sun Zhe at his poster
pic3.
8 April
Master student Kentaro Takatori (now Ph.D. Candidate at the Tokyo Institute of Technology) published:
"Indium-free organic thin-film solar cells using a plasmonic electode" by
Kentaro Takatori, Takayuki Nishino, Takayuki Okamoto, Hiroyuki Takei, Koji Ishibashi and Ruggero Micheletto
Journal of Physics D, Institute of Physics,
vol
49 (2016), 185106
The link to this paper is
here. The research have been selected as
the cover of the journal ! (journal cover on the left represents one of the plasmonic electrode produced by Mr. Takatori)
2 March
Prof.
Cristiano Giordani partecipated to the 60th Annual meeting of the Biophysical Society, held from February 27 to March 2 at the Los Angeles convention Center, California, USA.
He presented a research with the title:
"Resonances and Spectral Characteristics of a Neural Network for the Song
Motor Pathway in Birds" by
Cristiano Giordani, Hector Fabio Rivera-Gutierrez and Ruggero Micheletto.
The research was presented in a
poster and appeared on the special issue of
Biophysical Journal:
Biophysical Journal, vol
110, 3, supplement 1 (2016), p631a
The link to the abstract is
here.
2015
25 October
Prof.
R. Micheletto and prof.
Aki Tosaka published "
Thermodynamics in English and Japanese", edited by
Kyoritsu Publishing, Tokyo, Japan. This is the textbook of prof. Micheletto spring course "Thermodynamics" at YCU undergraduate school.
This book is written in English with parallel translation in Japanese on adjacent pages. It is unique in its genre for Kyoritsu Publishing and for Yokohama City University as well.
10 September
Teaching assistant and Ph.D. candidate
Sun Zhe collaborated with students of the
Science Frontier High School for the realization of a robotic project to partecipate to the national selection of
WRO 2015 (World Robotics Olympiad). The news arrived that his team were selected. Yamada Tokiya, Masuda Hisayuki and Mikata Kosuke from left to right in the picture not only were were selected, but they are gold medalist, first in Japan across all sections (!). Mr Sun Zhe developed partially software and supported technically the students together with the other Science Frontier teaching staff.
The three students and other teachers from Science frontier high school will be in Quatar for the world competition this November.
4 September
Prof.
Micheletto left for a Sabbatical leave at the
Visual Attention Laboratory, by the Harvard Medical School, Cambridge, USA. He will work in the group of prof.
Jeremy Wolfe on themes of Psychophysics, a branch of sciences that study perception and cognition in humans to apply results in physics and engineerings.
Here are some pictures of prof. Micheletto with prof. Jeremy Wolfe:
pic1,
pic2.
Next prof. Micheletto's classes in YCU are scheduled for September 2016.
25 August
Prof. Robert Kanaly publishedi:
"Application of DNA adductomics to soil bacterium Sphingobium sp. strain KK22" by
R. Kanaly, R. Micheletto, T. Masuda, Y. Utsuno, Y. Ozeki and N. Hamamura,
MicrobiologyOpen, Wiley,
DOI:
10.1002/mbo3.283, pag. 1-7 (August 2015)
The link to this paper is
here.
10 July
Professor
Tomasz Rutkowski director of the Brain Computer Interface Laboratory (
Tara, Tsukuba university) visited prof. Micheletto group and his Cognitive Information Science laboratory. He gave a lecture in the framework of Yokohama City University faculty of science "Professors Room Seminars" program.
The seminar was held in the main class building from 14:30 to 16:00, in room 22.
Title of the talk was "Student Teaching and Research Laboratory Focusing on Brain-computer Interface Paradigms", a link to the paper on which it is based is located
here. A link with all recent works of prof. Rutkowski is
here.
28 May
Professor Micheletto visited prof. A. Cichocki, head of the laboratory for Advanced Brain Signal Processing in Riken, Japan.
Prof. Cichocki is author of a fundamental book about tensor factorization, Nonnegative Matrix and Tensor Factorizations, (Wiley, 2009) an emerging method to analyze complex and noisy big-data structures. They discussed about how to possibly collaborate to apply these mathematical techniques to analyze scientific data of different kinds, from material science to cognitive/brain science related data.
14 May
Published
"Electronic properties of substitutional impurities in InGaN monolayer quantum wells" by G. Alfieri, T. Tsutsumi and R. Micheletto,
Applied Physics Letters 106, 192102 (2015),
here (pdf, 2Mb).
16-17 March
Prof.
Ruggero Micheletto partecipated to the 6th Interdisciplinary Seminar for Optical Science, sponsored by the JSPS Bilateral Cooperation Program (Italy-Japan). The seminar was organized by prof.
Takashi Yatsui of the University of Tokyo and prof.
Takuya IIda of the Osaka Prefecture University.
Prof. Micheletto presented a talk with the title "
Photonics and nanotechnology research in Yokohama City University" that was given on Tue 17 of March at about 11:45.
The program of the meeting is located
here (pdf, 0.1 Mb)
2014
19 Dec
Professor Cristiano Giordani from Universidad de Antioquia (Medellin, Colombia), Master's Degree in Physics from University of Rome "La Sapienza" and PhD in Physical Chemistry from Kyoto University, is awarded a visiting professor status by the YCU's Rectorate and Academic board. His visiting status is running from 13 December 2014 and ends on 13 January 2015.
Friday 19th of December, Prof. Giordani gave an introductory three hours course on Neural Networks and Neurosciences to the students of Doctors course in YCU and other faculty members.
The abstract of his class is here.
Some pictures of his visit are here: pic1 and pic2.
30 October
Master student
Watari Fujika participated the 2014 JVC Symposium held at GSI in Tsukuba city, Japan. She presented her work on the
"Development of
the multi frequency phase referencing method
in Very Long Baseline Interferometry(VLBI)" authored by F. Watari, Y. Asaki, R. Micheletto and the KaVA evolved star working group. Links to the symposium is are
here and
here. The OHP of the presentation are
here (pdf, 0.25 Mb in English).
9 October
Master student
Tsutsumi Toshiaki participated to OaM 2014, the Optics and Measurement International Conference, held in Liberec (Czech Republic). He presented a talk with the title
"Study of (0001) InGaN SQW optical memory effect correlated to the
increase of intense emission local domains by time-resolved
photoluminescence and thermal and pressure dependence" by T. Tsutsumi, M. Funato, Y. Kawakami and R. Micheletto. The talk was also summarized in a paper
here (pdf, 0.5Mb).
24 September
Master student
Watari Fujika participated the 12th VLBI User meeting. This is a workshop under the VERA framework, an organization of the National Astronomical Observatory of Japan. She gave a talk with the title
"Development
of the multi frequency phase referencing
method
in
VLBI
observation" by F. Watari, Y. Asaki and R. Micheletto. The talk was also summarized in a poster
here (pdf, 2Mb in Japanese).
17 September
Master student
Takatori Kentaro went to the annual meeting of the Japanese Society for applied physics (75th Oyobutsuri Gakkai). He gave a talk with the title
"Surface exciton polaritons supported by a J-aggregated-dye/air interface" by K. Takatori, T. Okamoto, K. Ishibashi and R. Micheletto. The talk was also summarized in an abstract
here (pdf, 0.1Mb in Japanese).
22 August
Prof.
Micheletto collaborated with the study "
The current status of Large-scale Cryogenic Gravitational Wave Telescope (KAGRA) Project" presented at the Japanese Physical Society meeting 2014. The report (
20aSB-1) describes the status of the KAGRA project and its ongoing challenges and achievements. Prof. Micheletto contribuited with a feasibility study concerning a passive instrument to detect with high precision the movement of mirror suspending cables. An abstract of the work is
here (pdf, 0.1Mb in Japanese). The report is authored by many researchers including Nobel prize winner prof. T. Kajita.
25 July
Tokyo University Professor
Motoichi Ohtsu PhD, visited YCU and gave a class to our faculty professors. The goal of the class was help our university to improve its standards of teching toward more interesting, fulfilling and memorable classes for our students.
Prof. Ohtsu explained that classes should be simpler and straighforward, that students love practical examples and that enjoy challenge themselves with tests and problems.
The Prof. Ohtsu talk is summarized in these
OHPs (1 Mb, PDF, Japanese).
Prof. Ohtsu was mentor of prof. Micheletto for two years starting 1994 (
pic1,
pic2) during the so called
Ohtsu "Photon Control" Project in the Kanagawa Academy of Science.
In that period of time, prof. Ohtsu made several world-wide technological advances, including one method to deposit nano-particles in a perfect monolayer. This method was done together with prof. Micheletto and is cited on hundred of international scientific journals and was patented in Japan (
paper, PDF, 2.5 Mb).
One picture of the event is here:
pic3.
10 July
Northeastern State University's Professor
Thomas O. Salmon OD, PhD, FAAO, visited Micheletto's group and gave a class about Visual perception to physics department students. The title of his talk was "Introduction to human vision".
The class was based on prof. T. Salmon own
Vision Science II classes linked
here and supporting material for his lecture is
here.
Some pictures of the event are here:
group, working
1, working
2.
3-4 July
Prof.
Takashi Yatsui has been awarded a bilateral collaboration project from JSPS (Japanese Society for the Promotion of Science).
Prof.
Micheletto is a member of the project team and in this framework was invited to visit the European laboratory for non linear spectroscopy
LENS in Florence, Italy.
Prof. Micheletto and other colleagues from Japan, visited the laboratories (
pic) and had proficuous discussion about prossible collaboration in the non-linear optics field between Japanese and Italian top researchers.
Here is a picture of the meeting in LENS (
pic) and a group picture taken outside the laboratories (
pic).
12 March
Published
"Blinking in Photoluminescence of InGaN Devices is Caused by Slow Beating of THz Vibrations of the Quantum Well" by R. Micheletto, K. Oikawa and C. Feldmeier,
Applied Mechanics and Materials,
541-542, pag. 253-257 (2014)
5 March
Prof.
Micheletto collaborated with the study "
The current status of Large-scale Cryogenic Gravitational Wave Telescope (KAGRA) Project" presented at the Japanese Physical Society meeting 2014. The report (
27aTL-1) describes the status of the KAGRA project and its ongoing challenges and achievements. Prof. Micheletto contribuited with a feasibility study concerning a passive instrument to detect with high precision the movement of mirror suspending cables. An abstract of the work is
here (pdf, 0.1Mb in Japanese). The report is authored by many researchers including T. Kajita (Nobel prize winner 2015).
26-28 January
|
|
|
Dr. Student Sun Zhe was invited to the ISEEE 2014, the International Conference on Information Science and Electronics Engineering. He gave a talk with the title "Emergence of Intelligent Behavior From a Minimalistic Stochastic Model for Robots" (OHPs, pdf, 3.7Mb).
Also, his talk has been accepted to be published on the proceedings of the conference, a peer-reviewed publication affiliated to IEEE (link). The study he presented is a very simple theoretical and simulation-based study in which a markov chan is used to create a transition Matrix to guide a robot in a Maze. The Robot first receives a training session where the user drives it within a series of mazes. During this phase the various robot sensory states are treated as a markov-chain to fill up a Transition Matrix bi-dimensional array. Then, the robot is let alone to drive in an unknow maze. He demonstrated that the robot -without any knowledge of the its position or exit location, nor with any empirical instructions or algorithm- can exit the maze in a minimal time. This effect is showing that a purely stochastic approach to learning, can lead to the emergence of what it looks an "intelligent behaviour", with an extremely simple algorithm, spontaneously and without any complex set of instructions.
Here are pictures taken at the congress pict, pict, pict.
|
22-23 January
|
|
|
Prof. Micheletto was invited to the 4th International Conference on Advanced Materials Research link in Macao, China.
He gave a talk with the title "Blinking in Photoluminescence of InGaN Devices is Caused by Slow Beating of THz Vibrations of the
Quantum Well", by R. Micheletto, K. Oikawa and C. Feldmeier (program of the meeting here, pdf 1.5Mb). He presented his theory to explain the dynamical behaviour of photoluminescence of InGaN material as a lattice vibrational displacement waves interference.
Also, he discussed with several scientists his latest results on the blinking and memory effect of the luminescence of wide band-gap optical materials.
Here is some pictures taken at the Banquet evening of the congress pict and pict.
|
2013
18 Dec
Bachelor student
Tsutsumi Toshiaki and Prof. Micheletto were invited by prof.
Yoichi Kawakami in Kyoto University.
Mr. Tsutsumi discussed with the group his latest results on the blinking and memory effect of the luminescence of wide band-gap optical materials.
Mr. Tsutsumi has been selected to enter our graduate school in physics from April 2014. He will continue his research for an explanation of the fundamental phenomena behind optical instabilities of optical devices.
9-13 December
Graduate student Sun Zhe was invited for a speech at The 39th Symposium of the Japanese Artificial Devices for Cognition research society of Japan.
He gave a talk with the title "Study of Information Processing Systems Based on Neural Network of Visual Cortex", by Sun Zhe and Ruggero Micheletto (program of the meeting here, abstract).
In this study, we improved the computational model of object recognition in cortex (HMAX Model) to help visually impaired persons to recognize simple images.
The conference site is located (here) and some pictures of the event are here (pic1, pic2).
|
5 November
Master student
Takatori Kentaro participated to MNC 2013, the 26th International Microprocesses and Nanotechnology Conference. He presented a talk with the title
"Rare-metal-free organic thin-film solar cells using plasmonic electrodes" by K. takatori, T. Okamoto, H. Takei, K. Ishibashi and R. Micheletto. The talk was also summarized in a poster in Japanese
here (pdf, 0.5Mb in Japanese).
28 October
Published
"Observation of lattice thermal waves interference by photoluminescence blinking of InGaN quantum well devices by R. Micheletto, K. Oikawa and C. Feldmeier,
Applied Physics Letters 103, 172109 (2013),
here (pdf, 2Mb).
2 October
Prof.
Yoshiharu Asaki of JAXA
Institute of Space and Austronautical Science visited Micheletto laboratory with his student Miss
Kozue Kusuno. They made a presentation of their late research about Red Supergiant stars maser emission. Their goal is possibly collaborate with Micheletto's studetns for a method of automatic detection and patter recognition in astrometry data.
9-13 September
|
|
|
Graduate student Sun Zhe was invited for a speech at the 17th International Conference on Image Analysis and Processing held in Naples, Italy. His talk, based on a study of former graduate student T. Kishino, was scheduled in the "Assistive Computer Vision and Robotic" Workshop session (link to the program and to the flyer).
The paper (pdf, 1Mb) was accepted for publication on peer review international journal: Lecture Notes in Computer science, vol. 8158 (2013), pp 20-29 (link).
The conference site is located (here) and some pictures of the event are here (pic1, pic2). Prof. Micheletto (pic) accompanied his graduate student Mr. Sun and attended partially the conference.
|
3 August
Prof. Micheletto was coordinating an event with the title "Creative Science: let's make a next generation robot". This event was in the framework of the ministry of education program called "
Hirameki". This program is awarded to professors that obtained national "Kaken" research grant. His graduate students
Fujika Watari and
Sun Zhe helped in the organization of the event. About 37 young students partecipated, plus parents and visitors. In the lunch interval the professional magician
Waddy, picture on the right, entertained the students with magic tricks, some of them also based on the physics theme.
A report of the day is at this
link (in Japanese).
26 July
Bachelor student Isozaki Yoichi and Prof. Micheletto were
invited by Dr. Fabio Dalla Libera to the "Intelligent Robotics Laboratory" of prof.
Ishiguro, Osaka University.
They discussed about Isozaki research project in which he is studying mathematical algorithms to represent natural motion of Robot body in particular the head.
They visited Ishiguro Laboratory, and could observe in live action some of his famous robots, see
pict and
pict.
12 June
Prof. Micheletto was
invited for a speech at the brainstorm meeting "Art and Science digital renaissance" meeting at the Italian Institute of Culture in Tokyo (
link). He presented a talk about how art is implicit in science and about the new tools of 3D modeling and data representation. The meeting was organized by Vito Cappellini from the university of Firenze. The program of the event is
here.
3-8 June
Prof.
Ali Bajja, Dean of the
Faculte Polidisciplinaire of the University Hassan Premier in
Khouribga, Morocco, visited prof. Micheletto group.
He had a one hour colloquium with professor
Tsutomu Fuse, president of YCU, he introduced his faculty with this
presentation. Also, he discussed with professor Micheletto (
pic) and other professors in YCU (
here with prof. Yoshida, responsible for African Studies in YCU) to enhance the possibility of future collaborations between the university of Hassam Premier in Morocco and YCU in Japan.
Professor A. Bajja also did some studies on his Geological samples with SEM facilities in YCU. Here is a picture of research activity at the Electron Microscope:
pic.
2-7 June
Prof.
Micheletto and
Chongmeng Wong partecipated at the 2013 Yukawa Seminars on Gravitational Waves, Kyoto (
link).
Chonmeng Wong presented a study (a brief explanation in these slides:
pdf) with the title "
A shadow sensor device for KAGRA
gravitational wave telescope" as a brief oral presentation and in the poster session
Here is the
group picture. Some other pictures of the event:
pic,
pic.
22-25 May
The Robotics and Mechatronics Conference 2013 (ROBOMEC 2013) was held in Tsukuba, Japan on May 22-25, 2013. Second year master student
Sun Zhe attended the conference and talked aout the algorithm of Natural Language Processing and pattern recognition with the researchers. He also tried to operate the
ROPITS what was designed by Hitachi.
pictures of the event are
here.
22-24 April
Prof. Micheletto partecipated to the First Italy-Japan workshop in nanophotonics in PISA, Italy.
link, (
link )
19 April
The realization of the new generation of gravitational waves opened a new era in the Universe observation. Second year master student
Sun Zhe and undergraduate student
Wong Chonmeng visited Italian Institute of Culture and attended the seminar.
In few years from now the detection of the gravitational wave radiation will allow the investigation of catastrophic events in the Universe through a new perspective: the gravitational window. Japan and Italy are leading this evolution thanks to the realization of the
KAGRA and
Advanced Virgo detectors and the
Einstein Telescope design study. Perspectives and technical aspects were discussed.
22 February
Dr.
Fabio Dalla Libera from Osaka University, prof. Ishiguro group, visited prof. Micheletto and made three hours class to Graduate and Undergraduate students. He also established links for a collaboration in the field of Robotics and visual Perception. A picture of the event is
here.
An extract of his class OHPs is at this
link (pdf, 12 Mb).
A curriculm vitae and pubblications of Dr. Dalla Libera are located
here.
The visit was supported by the "Basic Research Founding" program of Yokohama City University.
14-15 February
Prof. Micheletto was elected member of
KAGRA project, an international collaboration to realize a large-scale cryogenic
Gravitational Wave telescope. He will be in charge of designing a very sensitive optical sensor for detecting tiny movement of the cable that is holding the main interferometer mirror. The project is supervised by prof. T. Kajita (Nobel in Physics 2015) and prof. K. Kuroda. Prof. Micheletto undergraduate student
Wong Chonmeng will partecipate to the research project.
The program of the meeting is located
here.
17 January
Prof. Yoshiharu ASAKI of the Institute of Space and Austronautical Science visited Micheletto's laboratory and made a lecture to its students with the title "
Research topics on radioastronomy in JAXA".
Also, Miss Fujika WATARI started the investigation topic with prof. Asaki for her Master Thesis research. She will help prof. Asaki concerning treatment and analysis of data coming from the radiotelescope ALMA in Chile.
2012
3 December
Master student Takahisa Kishino presented a research talk to the 38th Symposium of the Japanese
Artificial Devices for Cognition research society of Japan. The talk title was "
A Monocular Pederstrian Detection System for Visually Impaired". The PDF of his research paper is
here, and the OHPs of the presentation
here (in Japanese).
The site of the conference is
here and the abstract of the talk
here.
23 October
Prof. Micheletto visited prof.
Kuroda Kazuaki of Tokyo University, a member of
KAGRA project, an international
collaboration to design and realize a new kind of Gravitational antenna in
Kamiokande, central Japan. The project is frieldly called as
the final mission of Albert Einstein.
Prof. Micheletto and prof. Kuroda discussed about the possibility of the realization of a super-high sensitive optical vibration sensor in the system. Here is a picture of the meeting with prof. Kuroda (
pic) and some desctiptive
slides about KAGRA and its principle of operation (partially in Japanese).
11 October
Northeastern State University's Professor
Thomas O. Salmon OD, PhD, FAAO, visited Micheletto's group and gave a class about Visual perception to physics department students. The title of his talk was "Temporal and spatial aspects of human visual perception".
The class was based on prof. T. Salmon own
Vision Science II classes linked
here.
Some pictures of the event are here:
pic1,
pic2.
10-12 October
Prof. Micheletto was
invited to the
LEDs 2012 conference in San
Diego, USA. He gave a talk with the title "The observation of nano and micro scaled optical
blinking phenomena in the emission of InGaN LEDs: characterization and
models". The relevant part of the conference program is
here and the biography given is
here. Also, the PDF of the OHPs presented at the meeting is available
here.
Two pictures taken at the event are here:
pic1,
pic2.
10-17 July
Prof.
Khalil El-Hami, Director of Nanosciences and Modelization Laboratory of the "University Hassan Premier
Faculty Polydisciplinaire-Khouribga" in Morocco, visited Micheletto's
laboratory. During his one week stay he also visited other laboratories
in Yokohama City University and in Tokyo area.
He gave a talk in the
framework of Yokohama City University "Basic Science Seminars" with the
title "
Nanomaterials and nanocomposite from nanoscience to nanotechnological devices"
on July 12th. He also established some link to attempt research grants
for collaboration in the near future. A picture of the presentation is
here (
pic1).
14 July
Prof. Micheletto was invited to the annual "Science Fair" that is held by the Kanagawa government. He was in charge of the physics stand where several basic physics experiments were demonstrated. The stand was visited by the Governor of Kanagawa, here is a picture of prof. Micheletto talking with him
pic.
23 May
Prof. Micheletto partecipated to the 20th "Near-field Optics" meeting
of the Optical Society of Japan. He presented a Poster with the title "
The study of the blinking phenomenom in InGaN optical devices" by R. Micheletto and H. Goto of AI Tech Japan. Also his student Takatori presented a poster with the title "
Exiton-Surface Plasmon Strong Coupling in Plasmonic Crystals". This second poster was done with Dr. T. Okamoto of Riken, K. Oikawa and R. Micheletto. The poster presentation program is
here, the conference announcement is
here, and two pictures of the event is located here (
pic1,
pic2).
16 April - 26 May
Prof.
Joaquim Gabriel Mendes
visited prof. Micheletto Laboratory in the framework of his Sabbatical
leave from Porto University, Portugal. He contributed to guiding
graduate and undergraduate students about
programming, setup and
hardware configuration on several research applications.
He also contribuited to the optimization and improvement of an advanced control software for a Mass-Spectroscopy device for research on DNA and biological samples .
12 April
|
Dr. Salvatore Anzalone from Osaka University visited prof. Micheletto group.
They
discussed about the use robotics algorithms for the study of brain functions and brain algorithms.
He gave a one hour class to prof. Micheletto students, followed their
seminars and mane keen comments and suggestions to their research.
The meeting was sponsored
by Yokohama City University in the framework of the "Education and Research" funding program.
|
2 April
Prof. Micheletto has been promoted to full professor.
5 March
|
Prof.
Micheletto visited Dr. Giovanni Alfieri researcher
at the Semiconductor Science and Engineering laboratory in Kyoto
University.
They
discussed about the use of "Ab Initio" methods for the realization of
models to understand the optical emission mechanism of InGaN material
and in general optical materials.
The meeting was sponsored
by Yokohama City University in the framework of the "Fundamental Research" funding program.
|
10 February
|
Dr.
Nicolangelo Iannella, Research fellow at the University of Adelaide,
School of Electrical and Electronics Engineering, Adelaide,
South Australia.
He
gave a lecture with the title "Engineering the Brain: from synaptics
plasticity to hardware applications".
The
talk is given in the framework of Yokohama City University "Basic
Science Seminars"
program.
|
2011
14 December
Professor Micheletto collaborated to the organization of a interdisclipinary lecture-event.
The guest-professor was prof. Dario Ponissi, that made an invited special lecture on Italian Opera. He gave the class in the framework of Yokohama City University "special seminars".
He introduced the Italian Opera structure and form, he performed live several exemples of acts, showed and commented videos of famous operas and responded to random questions from the audience.
The lecture was extremely successful and attracted an exceeding number of people from outside the university.
Here are two pictures of the event (pic1, pic2).
7-9 December
|
Prof. Micheletto was invited to the ISSNIP 2011 internationa meeting in Adelaide
Australia.
He gave a lecture
with the title "A λ/30 Resolution
Laser Speckle
Pattern Biosensor for Dynamic Studies on Live Samples", a study
made
with M. Fernanda Avila, S. Yamaguchi and prof. H. Uchiyama.
The talk was
summarized in a peer-reviewed article (link) on the IEEE Xplore digital library.
The abstract of
the paper is here (pdf, 350Kb) and some picture taken at
the conference are here: pic1, pic2 |
5 December
Prof. Micheletto
gave a presentation to the 37th Symposium of the "Association
of Sensorial Substitution". He gave a talk about a novel optical
illusion that was discovered and studied for the first time in his
laboratory.
Title of the talk was "A novel optical
illusion based on visual-acoustical sensory interaction, possible
applications", the abstract of this presentation is here, the complete program of the symposium is here.
11 November
|
Prof.
Micheletto collaborated in the organization of the event Italy in Japan 2011, realized in cooperation of the Italian
Embassy and Japanese and Italian universities.
He was in the organizing
commetee and gave a lecture
with the title "The realization of a new kind of nano-meter
sensitive laser microscope".
The pamphlet cover
of the conference is here,
and the program of the event is here.
Here is a picture of prof. Micheletto at the event.
|
7 November
|
|
Prof.
Micheletto coordinated the visit of
the Italian
Ambassador Vincenzo Petrone.
The event was
organized by a common effort between the Italian Embassy
and Yokohama City University.
More than 50 selected students partecipated to the event, the
Ambassador gave a class with the title ECONOMIC REALITIES
AND ITS
RELATIONS WITH JAPAN.
The pamphlet of
the event is here. Some pictures of the event are here:pic2, pic3
and pic4.
|
April 29
|
|
Publication on Optics
Material Express:"Real-time
near-field evidence of optical
blinking in the
photoluminescence of InGaN by scanning near-field
optical
microscope", by K.
Oikawa, C. Feldmeier, U.T. Schwarz, Y. Kawakami and
R. Micheletto. here.
|
26 April
|
Junichi Komatsu, second year master student, and prof. Micheletto visited the
Institute of Space and Astronautical
Science (JAXA), Sagamihara, Tokyo area.
Prof. Yoshiharu Asaki
delivered a guided tour of the facilities and introduced all the main
missions and research themes currently ongoing at JAXA.
The goal of the informal visit was to establish possible link for
student exchange and research collaboration in the space research field.
Some picture of the visit are here, pic1,
pic2 |
18-24 March
| 
|
|
Kotaro Oikawa, second year
master student, is invited to the PIERS
International conference (Progress In
Electromagnetics Research
Symposium, in Marrakesh, Morocco link).
He
gave an oral lecture with the title "An optical instability phenomena
in the optical emission of InGaN devices", the abstract is here and the submission details here.
Some event picture
are in the following links:
pic1, pic2
The presentation
travel expences were sponsored by Yokohama City
University.
|
21 February
|
Dr Francesco Enrichi of the Institute CIVEN and Nanofab,
Marghera (Venice), Italy, visited Micheletto's group and made a
presentation of his nano-bio sciences research to
the students and colleagues.
He
gave a class in the framework of the "Basic Sciences Seminars", to
students, professors and researchers of the Nanosystems and
Genomesystems faculties.
The title of his talk was "Veneto
Nanotech, the Italian Cluster for Nanotechnology: presentation, mission
and research activity". The abstract of the presentation is here. |
2010
13 December
|
Prof. Yoshiharu Asaki
of the Institute of Space and
Astronautical
Science (JAXA), Sagamihara, Tokyo area, visited Micheletto's
group and made a presentation of his space-related research to
the students and colleagues.
He also briefly discussed about possible collaborations and
exchange of students and/or researchers.
It has been proposed that next year, some of Micheletto's laboratory
younger students will visit JAXA research center and possibly establish
a common research theme.
|
8 December
Prof. Micheletto was invited for a presentation at the Italian Embassy in Tokyo.
He presented in front of the consul ministry and and other
representatives his research in the field of Cognitive Information
Science.
Topic was the current status of his research "VisualSound: a
portable
system for the conversion
of visual stimuli in sounds as aid for people with vision problems".
The project is in collaboration with of Hicare Srl, Torino,
Italy, G. Iannizzotto and F. Battaglia of Visilab in Messina, Italy and T.
Kishino of Yokohama City University, Japan.
The project has been issued within the framework of the Scientific and
Technological Co-operation Agreement between Japan and Italy (link). A summary of the meeting with
downloadable abstract of the talk is here.
15-16 November
|
Prof. Khalil El-Hami of the Polydisciplinary Faculty of Khouribga,
Hassan First University, visited Micheletto's group and made a
presentation of his research to
the students and colleagues (a picture with prof. M. Tachibana, pic1).
He discussed about possible collaborations with the group and about
exchange of students and/or researchers.
Also he established a plan for a possible application of funds for
international collaboration.
|
4-5 November
Prof. Micheletto is
invited at the France-Japan
workshop on Nanophotonics.
He presented a talk with the title "The optical instabilities and
blinking phenomena in the emission of InGaN quantum wells", and a
poster with the same title. The book of Abstracts is here
(pdf, 3Mb), the poster is here and
a picture of the event is here (pic1).
5-12 September
|
Prof. Micheletto
guided the International
Field-work trip of the "Micro Phenomena and Statistic Mechanics"
course.
This is a regular event sposored by our university. Prof.
Micheletto and six of his
student of visited academic and
industrial sites in Italy. The group visited these places:
1. The Nanofab lab
in CIVEN, in Venice.
2. The department of
physics in the Ca'Foscari University of Venice (pic1, pic2)
3. The department of
Asian Studies in the Ca'Foscari University of Venice (pic1, pic2)
4. The department of
Experimental physics at the University of Torino, Italy (pic1)
5. The department of
Physics at the University of Pisa Italy (pic1)
6. The VIRGO
gravitational antenna in Pisa (pic1,pic2)
The group followed
meetings, special events and lectures organized by the hosts.
A report
of the fieldwork trip is here
(pdf, 2Mb), and a gallery with pictures is here (pdf, 10Mb). |
17 July
Prof. Micheletto and master student Oikawa Kotaro are invited to the Science Fair exhibition of
Kanagawa prefecture
in Yokohama. They introduce very simple physics experiments to
high school students and children to induce them to like and study
physics. Some picture of the event are here: pict1
and pict2.
To the event contributed also prof. Claudio Capiglia visiting
professor
at Politecnico di Torino and program manager of Recruit R&D
Co., Ltd.
15-16 July
|
Master student Oikawa Kotaro presented a
research talk at the 19th
Nano-optics research group meeting of the Japanese Optical
Society. The title of his talk was "Local evidence of optical instabilities in
the photoluminescence of InGaN by SNOM real-time investigation" (here). |
21-24 June
Prof. Micheletto partecipate at the 2010 OSA Optical
Sensors Conference in Karlsruhe, Germany. He presents a paper with
this title "Index of Refraction
Sensors; Virtually Unlimited Sensing Power at Critical Angle" (here)
and a poster with the same title (here).
The conference include the "LaserFest": celebration of the 50 Years of
Lasers, with the talk of two Nobel Laureates (prof. T. W. Haensch and
prof. C.H. Townes).
31 March
 |
|
|
Prof. Micheletto assigned a mobility grant for the
years
2010-2011 from the Italian Ministry of Foreign Affairs for a research
project in partnership with Dr. R. Marchisio of Hicare Srl, Italy.
The project title is "VisualSound: a
portable
system for the conversion
of visual stimuli in sounds as aid for people with vision problems".
The project is also in collaboration with prof. G. Iannizzotto and F.
Battaglia of Visilab in Messina
and T. Kishino of Yokohama City University. The project has been issued
within the framework of the Scientific and
Technological Co-operation Agreement between Japan and Italy (link).
|
25 March
 |
Prof. Micheletto visited prof. Tiziana
Lippiello at the University Ca' Foscari in Venice, Italy.
They discussed about the possible exchange of students and researchers
between the two universities. |
5 February
 |
Prof. Micheletto is invited to give a lecture at
the Technicalshow
Yokohama
2010.
His talk was with this title: "Versatile optical fiber based
vibration sensors". |
20-22 January
 |
Prof. U.
T. Schwarz of Fraunhofer
Institute for
Applied Solid State
Physics, visited Micheletto group and made a presentation with
the
title "Optical properties and efficiency of InGaN quantum wells of
high power LEDs on the sub-nanometer length scale" (21 of January,
18:00). |
2009
21 December 2009 - 8 January 2010
Prof. Micheletto left for Europe. He took winter vacations and
subsequently visited prof. J.G.
Mendes, of the University of Porto, in Portugal for discussion of
possible research collaboration.
30 November:
|
| Published Transient
memory effect in the photoluminescence of InGaN
single quantum wells by C. Feldmeier, M. Abiko, U.T. Schwarz, Y.
Kawakami and R. Micheletto, Optics Express 17, 22855 (2009). here. |
24 November:
 |
| Published Near-field
evidence of local polarized emission centers
in InGaN/GaN materials by R. Micheletto, M. Allegrini and Y.
Kawakami,Applied Physics Letters 95, 211904 (2009).
here. |
|
1-7 November:
Invited visit
by the Dept. of Experimental physics,
Torino
University and Dep. of Physics "E. Fermi", Pisa University in the
framework of project "Near-field
polarization contrast for nano-optics applications" (Executive
program of coopeartion between Italy and Japan, project number 31)
October 18-23
Prof. Micheletto contributed to the presentation, "Metal Nanoparticle
Induced Blinking in Green InGaN Quantum Wells" by Anne Kuhnert,
Ulrich T. Schwarz, Christian Feldmeier and Ruggero Micheletto held at
the 8th International Conference on Nitride Semiconductors, ICNS-8,
Oct. 18-23, 2009, Jeju, Korea. The abstract of the talk is here.
30 september
 |
Christian Feldmeier concludes his visit in Japan and comes back
to his home university in Regensburg.
He summarized his research work
in a final thesis "Diplomarbeit" with the title "Blinking Phenomena in
InGaN Quantum Wells".
It is possible to download the whole diploma
thesis in pdf format from these links: part1
(3Mb), part2
(2Mb). |
3 Sept
 |
Invited Speech
at the Yokohama Creative
Technology Forum (the pamphlet is here).
Prof. Micheletto is invited to give a lecture with title
"Characteristics of the InGaN photoluminescence
blinking phenomena" (here). |
August 23
Prof. Micheletto appears on the State newspaper Kanagawa-shinbun. He was invited to give a talk in the occasion of the
celebration of the 150 anniversary of the Opening of Yokohama harbour.
He spoke briefly about the future of Yokohama City.
May 24-31, Mini-workshop in Pisa, Italy:
|
Prof.
Micheletto is invited to give a lecture to the School of Graduate
Studies "Galileo Galilei", the University of Pisa, Italy for the
Miniworkshop on Confocal and near-field polarization applications.
The talk was held at the Physics Department, University of Pisa
Pisa 26, 27 and 28 May 2009. The title of the talk was "Japanese
research in Nanotechnology: Kyoto
University and Yokohama City University research topics and
applications", 27 of May, 15:30 (the call for the talk is here). |
April 4
Maria Fernanda Avila Ortega joined the group as
Research
Student. She is currently preparing her Master course entrance
examination. She will be involved in one of our biosample analysis
related projects.
April 1
Oikawa Kotaro joined the group as B4 student.
His
research will
concern the use of near-field optical techniques for the study of solid
state InGaN material optical properties.
2008:
October 16
Christian Feldmeier joined the group as Research
Student. He
will be involved in the optical analysis of InGaN luminescence
instabilities and blinking.
October 31
|
| Publication on Applied
Physics Letters: "Tenfold
improved
sensitivity using high refractive-index substrates for surface plasmon
sensing", by R. Micheletto, K. Hamamoto, T. Fujii and Y. Kawakami, here. |
October 15-17
 
|
|
Prof. Micheletto is invited to present his
research at
the "Manufacture and Technology Collaboration meeting" at the
Industrial Technology
Center in Ebina Yokohama. He present a poster with the title "An
Optical Multiple reflection super high sensitivity sensor" (here)
|
September 11
Prof. Micheletto is invited to give a speech at the
"Physical Sensor" meeting of the Institute of Electrical Engineering.
The meeting was held in Waseda
University, Tokyo. Title of his talk was "A multiple reflection
optical sensor", here.
September 5
August 27
|
| Prof. Micheletto
presents a poster at the "Nanotechnology
Simposium 2008", held in Yokohama "Marineria" Hall. Title of his
research was "Super high sensitivity multiple reflection optical
sensor" (here) |
August 3-8
|
| Prof. Micheletto
co-authored with prof. A. Kunold a poster at the 15th International
Conference on Superlattices, Nanostructures and Nanodevices, held in
Natal, Brazil (link).
Title of the research was "Blinking Luminous Centers in a InGaN Quantum
Well", by R. Micheletto, S. Suzuki, Y. Kawakami, A. Kunold, P. Pereyra,
Y. Narukawa and T. Mukai (conference program here) |
April 30
|
|
Publication on Optics Express:"A
polarization-modulation
method for the near-field mapping of laterally grown InGaN samples", by
R. Micheletto, D. Yamada, M. Allegrini and Y. Kawakami. here.
|
April 1
Ruggero
Micheletto is elected associated
professor and head of the "Cognitive Informatics Laboratory".
Post
Doctoral Opening
Group photos
