Accuracy of Current Delivery System in Current Source Data-Driver IC for AM-OLED

Hattori, Reiji The Institute of Electronics and Information Engin 2004 Journal of semiconductor technology and science Vol.4 No.4

Current delivery system, in which the analog current produced by a unique DAC circuit is stored into a current-memory circuit and delivered in a time-divided sequence, shows variation of output current as low as 4% in a current source data-driver IC for AM-OLED driven by a current-programmed method without any fuse repairing after fabrication. This driver IC has 54 outputs and can sink constant current as low as 3 ${\mu}A$ with 6-bit analog levels. Such a low current level without variation can hardly be obtained by an ordinary MOS transistor because the current level is in the sub-threshold region and changes exponentially with threshold voltage variation. Thus we adopted a current mirror circuit composed of bipolar transistors to supply well-controlled current within a nano-ampere range.

플레이스테이션 3 상에서 수행되는 멀티플렛 식별자의 최적화

Hattori, Masami,Mizuno, Takashi Korean Society of Earth and Exploration Geophysici 2010 지구물리와 물리탐사 Vol.13 No.1

To enable high-performance computing (HPC) for applications with large datasets using a $Sony^{(R)}$ $PLAYSTATION^{(R)}$ 3 ($PS3^{TM}$) video game console, we configured a hybrid system consisting of a $Windows^{(R)}$ PC and a $PS3^{TM}$. To validate this system, we implemented the real-time multiplet identifier (RTMI) application, which identifies multiplets of microearthquakes in terms of the similarity of their waveforms. The cross-correlation computation, which is a core algorithm of the RTMI application, was optimised for the $PS3^{TM}$ platform, while the rest of the computation, including data input and output remained on the PC. With this configuration, the core part of the algorithm ran 69 times faster than the original program, accelerating total computation speed more than five times. As a result, the system processed up to 2100 total microseismic events, whereas the original implementation had a limit of 400 events. These results indicate that this system enables high-performance computing for large datasets using the $PS3^{TM}$, as long as data transfer time is negligible compared with computation time.

Electrochemical Synthesis of TiO₂ Photocatalyst with Anodic Porous Alumina

Hattori, Takanori,Fujino, Takayoshi,Ito, Seishiro Materials Research Society of Korea 2007 한국재료학회지 Vol.17 No.11

Aluminum was anodized in a $H_2SO_4$ solution, and titanium (IV) oxide ($TiO_2$) was electrodeposited into nanopores of anodic porous alumina in a mixed solution of $TiOSO_4$ and $(COOH)_2$. The photocatalytic activity of the prepared film was analyzed for photodegradation of methylene blue aqueous solution. Consequently, we found it was possible to electrodeposit $TiO_2$ onto anodic porous alumina, and synthesized it into the nanopores by hydrolysis of a titanium complex ion under AC 8-9 V when film thickness was about $15-20{\mu}m$. The photocatalytic activity of $TiO_2$-loaded anodic porous alumina ($TiO_2/Al_2O_3$) at an impressed voltage of 9 V was the highest in every condition, being about 12 times as high as sol-gel $TiO_2$ on anodic porous alumina. The results revealed that anodic porous alumina is effective as a substrate for photocatalytic film and that high-activity $TiO_2$ film can be prepared at low cost.

Now and Future of the 'Pre-delinquent' System in Japan

Hattori Akira 강원대학교 비교법학연구소 1996 江原法學 Vol.8 No.-

Searching for new ways to make good use of meat : The Solubilization of Myofibrillar Proteins of Vertebrate Skeletal Muscle in Water

Hattori. Akihito 한국축산식품학회 2004 심포지움 및 학술발표회 Vol.- No.34

A GRADIENT-T SZE

HATTORI MAKOTO,OKABE NOBUHIRO The Korean Astronomical Society 2004 Journal of The Korean Astronomical Society Vol.37 No.5

The inverse Compton scattering of the cosmic microwave background (CMB) radiation with electrons in the intracluster medium which has a temperature gradient, was examined by the third-order perturbation theory of the Compton scattering. A new type of the spectrum distortion of the CMB was found and named as gradient T Sunyaev-Zel'dovich effect (gradT SZE). The spectrum has an universal shape. There is a zero distortion point, the cross over frequency, at 326GHz. When the hotter region locates closer to an observer, the intensity becomes brighter than the CMB in the frequency region lower than the cross over frequency and fainter than the CMB in the frequency region higher than the cross over frequency. When the cooler region locates closer to an observer, the distorted part of the spectrum has an opposite sign to the above case. The amplitude of the spectrum distortion does not de-pend on the electron density and depends on the heat conductivity and the total temperature variation along a line of sight. Therefore, the gradT SZE provides an unique opportunity to measure thermally nonequilibrium electron momentum distribution function in the ICM and combined with the X-ray measurements of the electron temperature distribution provides an opportunity of direct measurement of the heat conductivity in the ICM.

Coulomb blockade behaviors in individual Au nanoparticles as observed through noncontact atomic force spectroscopy at room temperature

Hattori, Shigeki,Kano, Shinya,Azuma, Yasuo,Tanaka, Daisuke,Sakamoto, Masanori,Teranishi, Toshiharu,Majima, Yutaka IOP Pub 2012 Nanotechnology Vol.23 No.18

<P>Coulomb blockade behaviors in individual Au nanoparticles of 2 nm core diameter in double-barrier structures have been studied by means of noncontact atomic force spectroscopy (NC-AFS) at room temperature. The Au nanoparticles with a 1-decanethiol ligand were chemisorbed by 1,10-decanedithiol molecules of a mixed 1-octanethiol/1,10-decanedithiol self-assembled monolayer coated on a Au(111) surface; these particles were observed through NC-AFS. NC-AFS measurements of the cantilever frequency shift–sample voltage (&Dgr;f–V<SUB>S</SUB>) curves were sequentially conducted on three Au nanoparticles under the same experimental conditions; the &Dgr;f–V<SUB>S</SUB> curves were found to deviate from the parabolic (&Dgr;f<SUB>N</SUB>) curve in the cases where no extra charge existed on the Au core. The experimental &Dgr;f<SUB>CB</SUB>(=&Dgr;f − &Dgr;f<SUB>N</SUB>) and &Dgr;f<SUB>CB</SUB>/V curves agree well with the theoretical curves obtained using a golden-rule calculation and the same parabolic parameters. All the results, through NC-AFS, suggest Coulomb blockade behaviors in the Au nanoparticles at room temperature.</P>

Effect of Plastic Working on Fatigue Properties of Ti-6Al-4V Alloy with Notch

Hattori, Nobusuke,Nishida, Shinichi,Hara, Masahiro,Son, Sun Young Trans Tech Publications, Ltd. 2005 Key Engineering Materials Vol.297 No.-

<P>This study is focused to the effects of plastic working on the fatigue strength of Ti-6Al-4V alloy with notch. In general, the fatigue strength of plastic worked specimen is higher than that of non-worked one. However, the potential of hardening ability of Ti-6Al-4V alloy is very limited. Accordingly, the effect of work hardening on fatigue strength about this material is very small. In addition, the surface of the worked part becomes rougher with increasing plastic deformed value and the fatigue cracks initiate at this part. Consequently, the fatigue limit of the plastic worked specimen is lower than that of the non-plastic-worked one.</P>

Development of Anti-viral Agents from Natural Sources

Hattori, Masao The Plant Resources Society of Korea 2001 Plant Resources Vol.4 No.3

Human immunodeficiency virus (HIV), the causative agent of AIDS, still continues to spread rapidly in the world population, especially in Africa and Southeast Asia. At present, two kinds of therapeutic approaches are used for treatment of AIDS. One is to target HIV reverse transcriptase, which is responsible for the viral genome transcription. The other is to inhibit HIV pretense PR, which is essential for the processing of viral proteins. Drug combinations based on these approaches can reduce the blood virus to an undetectable level. However, a small amount of virus may lurk inside the immune cells in a dormant state. Another major obstacle of long-term treatment of the disease is remarkable mutation in HIV. Most of the clinical chemotherapeutic agents have one or more of these problems. High cost and harmful side-effects further reduced the desirability of these drugs. In the course our studies on development of anti-HIV agents from natural products, we investigated various crude drugs for their inhibitory activity against HIV-induced cytopathic effects (CPE) in culture cells, HIV-pretense (PR), HIV-reverse transcriptase (RT) including ribonuclease H (RNase H), and HIV integrase (INT). In the present paper, some inhibitory substances relating to the development of anti-HIV agents are reported.

Development of preparation, effective tools for the child in hospital

Junko Hattori,Miyuki Nishihara,Akemi Kumita,Akira Okazaki,Yuta Koma,Oh Gi-Dong 대한인간공학회 2014 대한인간공학회 학술대회논문집 Vol.2014 No.5

In child nursing field, bring out the self-efficacy “preparation” has become an important care for the children to red uce their fear and anxiety before undergoing the medical inspection and treatment and help them to understand the de scription more clearly. Preparation has been done a lot in many places, yet the system, which includes common conte nt, can be shared has not been built. The object is to share the preparation tools and develop the effective tool for medical field. This time, as the first-st ep, we would like to develop a preparation tool that has collective rewards for children. Review the preparation content by expert committee and literature; we selected eight items such as hospitalization, blood sampling, infusion, surgery, hospital discharge etc. Which are the common preparations have to be done to the hospitalization children. From the 5 prototypes, which were made by designers, we have adopted petal type tools that can be folded, played by children and also collected as a reward medals. From July to August in 2013, we researched reviews of this preparation tool from 89 children patients and 69 guardians, 60 nurses in pediatric hospital. As the result, this preparation tool was favorably commented, the children were encouraged and they were happy to collect some rewards. At the free discussion, the subjects said they have enjoyed folding the petal type tool many times over and over, and this also encouraged the children to collect petals as their reward. From these favorable comments we confirmed our purpose has succeed. In the further study, we will customize the tools more sophisticated depending on the gender and developmental stage of the children and build a system that can be shared among the medical field.