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Search Results: 1 - 10 of 39054 matches for " Jun'ichi Tamaki "
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A proposed computer system on Kano model for new product development and innovation aspect: A case study is conducted by an attractive attribute of automobile
Md Mamunur Rashid, Junichi Tamaki, AMM Sharif Ullah, Akihiko Kubo
International Journal of Engineering, Science and Technology , 2010,
Abstract: Voice of Customer is important for new product development. New product development is a complex task in which a great deal of human physical resources, methods, and tools are involved. One of the well- appreciated models is Kano model for customer needs study for product development. Customer requirements are an important component of new product development. The customer expectations to the technical requirements of products are also necessary for new product development. The success of a new product development process for a desired customer satisfaction is sensitive to the customer needs assessment process. In most cases, customer needs of a product or product family are incorporated by setting the customer requirements and their relative importance in the first house of quality of QFD. This procedure is practically informal and does not present an obvious link between customer satisfaction and product attribute. In this view, Kano Model is a superior choice. Kano model has two dimensional questionnaires regarding customer satisfaction, i.e. functional and dysfunctional. Both functional and dysfunctional answer is determined Kano evaluation (product attribute). A computer system has been developed using the Monte-Carlo Simulation technique to simulate functional and dysfunctional answers independently and subsequently the Kano evaluation. Using this system one can determine the minimal number of respondents make a reliable conclusion for a definite product attribute. A case study is conducted for system verification by an attractive attribute regarding Kano model about an automobile.
A Kano Model Based Linguistic Application for Customer Needs Analysis
Md Mamunur Rashid,Jun'ichi Tamaki,A.M.M. Sharif Ullah,and Akihiko Kubo
International Journal of Engineering Business Management , 2011,
Abstract: Linguistic is the systematic study of language. Now quality doesn't always mean the "tangible attribute" of a product or service. It may also be linguistic. Thus, linguistic has applied for product design through capturing the voice of Customers. Capturing of the voice of customers has been done in different way, like Quality Function Deployment (QFD), Kansei Engineering and Kano Model regarding product design. Kano Model has two dimensional linguistic approaches, which is more voice capturing capacity than other methods. Reverse attribute study is important for more reliable product design for next actions than other attributes of Kano model i.e. attractive, must-be, one-dimensional and indifferent. Thus, this paper is exclusively study for reverse attribute. For this purpose, a reverse attribute based linguistic approach, which is run in the computer system for product design regarding Kano model aspect using threshold numbers of real consumers opinions converted into probability through fuzzy concept as an input of Monte Carlo Simulation system determining virtual customers is described in this paper.
Ionic Liquid as Useful Media for Dissolution, Derivatization, and Nanomaterial Processing of Chitin  [PDF]
Jun-Ichi Kadokawa
Green and Sustainable Chemistry (GSC) , 2013, DOI: 10.4236/gsc.2013.32A003

This paper reviews studies on dissolution, derivatization, and nanomaterial processing of chitin using an ionic liquid as useful media. Because chitin is the second most abundant polysaccharide on the earth after cellulose, there is major interest in conversion of native chitin resources into various useful materials after proper dissolution in suitable solvents. For the derivatization and nanomaterial processing of chitin, the author has been focusing on ionic liquids because which have been found to be used as good solvents for cellulose in a past decade. The author found that an ionic liquid, 1-allyl-3-methylimidazolium bromide (AMIMBr), dissolved chitin in concentrations up to 4.8 wt% and mixtures of the higher amounts of chitin with AMIMBr gave ion gels. Acetylation, the simplest derivatization, of chitin using acetic anhydride was achieved in the AMIMBr solvent under mild conditions. Furthermore, the chitin nanofibers were fabricated by regeneration technique from the chitin ion gel with AMIMBr using methanol. Moreover, filtration of the chitin nanofiber dispersion with methanol was carried out to give a chitin nanofiber film. The chitin nanofiber-poly(vinyl alcohol) composite film was also prepared from the ion gel by co-regeneration method.

Conductivity-Type Sensor Based on CNT- Composite for NO 2 Detection
Takeshi Hashishin,Jun Tamaki
Journal of Nanomaterials , 2008, DOI: 10.1155/2008/352854
Abstract: The CNTs with 20–50 nm in diameter were directly grown on Au microgap electrode by means of thermal CVD at 700°C for 60 minutes under EtOH-Ar-H2 atmosphere (6 kPa). The CNTs with entangled shape formed the network structure with contacting each other. In the CNTs-WO3 composite, WO3 grains with disk shape (50–200 nm) were independently trapped. The CNTs-WO3 composite sensor showed the fairly good sensor response (Ra/Rg = 3.8 at 200°C). The sensor response was greatly improved with CNTs-WO3 composite, comparing with that of CNT sensor (Ra/Rg = 1.05). This phenomenon can be explained by formation of p-n junction, between CNT(p) and WO3(n), and thus improvement of NO2 adsorption. The sensor response was decreased with increasing the WO3 amount in CNTs-WO3 composite, suggesting the electronic conduction due to WO3 connection.
The fate of Reissner-Nortstr?m black hole in the Einstein-Yang-Mills-Higgs system
Takashi Tamaki,Kei-ichi Maeda
Physics , 1999, DOI: 10.1103/PhysRevD.62.084041
Abstract: We study about an evaporating process of black holes in SO(3) Einstein-Yang-Mills-Higgs system. We consider a massless scalar field which couple neither with the Yang-Mills field nor with the Higgs field surrounding the black hole. We discuss differences in evaporating rate between a monopole black hole and a Reissner-Nortstr\"{o}m (RN) black hole.
Estimating Hawking radiation for exotic black holes
Takashi Tamaki,Kei-ichi Maeda
Physics , 2000, DOI: 10.1103/PhysRevD.62.107503
Abstract: We study about an approximation method of the Hawking radiation. We analyze an massless scalar field in exotic black hole backgrounds models which have peculiar properties in black hole thermodynamics (monopole black hole in SO(3) Einstein-Yang-Mills-Higgs system and dilatoic black hole in Einstein-Maxwell-dilaton system). A scalar field is assumed not to be couple to matter fields consisting of a black hole background. Except for extreme black holes, we can well approximate the Hawking radiaition by `black body' one with Hawking temperature estimated at a radius of a critical impact parameter.
Effects of Seed Hydropriming on Germination and Seedling Vigor during Emergence of Rice under Different Soil Moisture Conditions  [PDF]
Ken-Ichi Matsushima, Jun-Ichi Sakagami
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.48191

Seed priming is a physiological seed enhancement method. Hydro- or osmotic priming can advance germination under adequate moisture conditions. During direct seeding on well-drained paddy and upland fields, rice seeds occasionally encounter low soil moisture conditions. Under these conditions, rice seeds need to undergo rapid germination and secure emergence through improved water absorption capacity and seed bioactive. This study aims to clarify the effects of seed hydropriming on germination and seedling vigor in rice under different soil moisture conditions. The study employed three hydration conditions such as priming, soaking, and control. The seeds to be primed and soaked were submerged in tap water at 30℃ for 12 h. For priming, the seeds were subsequently dried to attain their initial seed weight, but the seeds for soaking were not dried before sowing, and the control seeds were untreated. In addition, different soil moisture conditions, such as 3%, 6%, 8%, 11%, 15%, and 20%, were set. Therefore, emergence time shortened with seed priming at 3%-11% soil moisture contents. In particular, at 8% soil moisture content, priming and soaking decreased emergence time by 26.8 h and 21.7 h, respectively compared with that of the control. At 8%-15% soil moisture contents, shoot elongation rate obtained with the priming seeds increased >1.2 times compared with that obtained with the control and soaking seeds. At >8% soil moisture content, shoot dry weight obtained with the priming seeds increased >1.3 times compared with that obtained with the soaking seeds. Furthermore, at declining soil moisture conditions, the increase in root dry weight is promoted by seed priming compared with that in the control seeds. These results suggest that increased root growth affects plant water absorption under low soil moisture conditions due to priming. This study demonstrates that seed priming facilitates rapid emergence and seedling vigor, unless extremely dry or flooded soil moisture conditions are present at seeding.

Helium and Argon Isotopic Studies of Fossil Material and the Theoretical Evolution of He and Ar in Earth’s Atmosphere through Time  [PDF]
Yuko Arakawa, Jun-Ichi Matsuda
International Journal of Geosciences (IJG) , 2012, DOI: 10.4236/ijg.2012.325091
Abstract: We analyzed the elemental concentrations and the isotopic compositions of helium and argon in Cambrian to Jurrassic aged Gastropod, Ammonite and Trilobite fossils in order to examine variation in these gases through time. Fossil samples yielded He and Ar isotopic ratios close to the present day atmospheric values, but also indicated some addition of a radiogenic component. We compared the results to theoretical values calculated from a mathematical model of Earth’s atmosphere assuming mantle degassing. Results from our mathmatical models showed that the 40Ar/36Ar ratio of Earth’s atmosphere increased rapidly after the formation of the Earth, but has been almost identical to the present day value for the last 1 Ga. For atmospheric helium, model results were consistent with present day atmospheric values, assuming complete helium degassing from the continental crust into the atmosphere. The model suggests that the atmospheric 3He/4He ratio has remained relatively constant for the last 0.1 Ga. Given the similarity between present day and ancient He and Ar isotopic ratios, we conclude that the corresponding ratios measured in ancient fossil material may partially reflect composition of the ancient atmosphere and are not necessarily due to contamination by the present day atmosphere.
Sequential Stimulus Pairing Procedure for the Students with Intellectual Disabilities  [PDF]
Mikimasa Omori, Jun-ichi Yamamoto
Psychology (PSYCH) , 2013, DOI: 10.4236/psych.2013.43A036

For most of students with autism spectrum disorders (ASD) and Williams syndrome (WS), a rare genetic neurodevelopmental disorder, are known to have intellectual disabilities (ID). Students with ID often show the difficulties in reading. Especially, they are difficult to acquire the equivalence relations among pictures, written letters, and sounds and to have fluent eye movement during reading. Previous research suggested that a student with autism acquired Kanji reading skills by using stimulus pairing training. However, for acquiring word reading skills, new training which facilitates the fluent eye movement is necessary and we developed sequential stimulus pairing training. In the present study, we examined the acquisition of word reading skills through sequential stimulus pairing training for three students with ID who were also diagnosed as WS and three students with ID who were not diagnosed with WS. In a trial, each letters, the word, spoken sound, and picture were presented sequentially. With 6 students, result indicated that they could acquire the word reading skills, and also showed the improvement of their eye movement in reading. The result suggested sequential stimulus pairing training is effective to acquire both equivalence relations and fluent eye movement for wide range of students with ID.

The Battle between Virus and Host: Modulation of Toll-Like Receptor Signaling Pathways by Virus Infection
Shin-ichi Yokota,Tamaki Okabayashi,Nobuhiro Fujii
Mediators of Inflammation , 2010, DOI: 10.1155/2010/184328
Abstract: In order to establish an infection, viruses need to either suppress or escape from host immune defense systems. Recent immunological research has focused on innate immunity as the first line of host defense, especially pattern recognition molecules such as Toll-like receptors (TLRs), RIG-I-like receptors (RLRs), and NOD-like receptors (NLRs). Various microbial components are recognized by their vague and common molecular shapes so-called, pathogen-associated molecular patterns (PAMPs). PAMPs induce inflammatory reactions mediated by the activation of the transcription factor, NF- B, and by interferons, which lead to an antiviral immune response. Viruses have the capacity to suppress or escape from this pattern recognition molecule-mediated antimicrobial response in various ways. In this paper, we review the various strategies used by viruses to modulate the pattern recognition molecule-mediated innate immune response. 1. Introduction The host immune system recognizes and eliminates invading pathogenic microorganisms such as viruses, bacteria, and fungi. The first line of defense in mammals is the innate immune system. Recently, the mechanisms by which the innate immune system recognizes pathogen have been extensively studied. Pattern recognition molecules/pathogen recognition receptors (PRRs) are classified into three families: Toll-like receptors (TLRs), RIG-I-like receptors (RLRs), and nucleotide binding-oligomerization domain (NOD)-like receptors (NLRs) [1, 2]. Ten TLRs (TLR1 to 10) have been identified in humans. The RLR family contains retinoic acid-inducible gene I (RIG-I) and melanoma differentiation associated gene 5 (MDA5) [3]. The NLR receptor family contains NOD1, NOD2, NLRP3, NLRPC5, NLRP1, NAIP, and CIITA [4]. In addition, DNA-dependent activator of interferon regulatory factors (DAI) has been identified as a DNA sensor [5]. Various microbial components are recognized as their vague and common molecular shapes by PRRs. Early responses against virus infection are initiated on recognition of pathogen-associated molecular patterns (PAMPs) by pattern recognition molecules, triggering two responses. One is the production of interferons (IFNs) resulting in an antiviral state as part of the innate immune response, and the second is maturation of dendritic cells (DCs) to establish acquired immunity. In order to establish an infection within a host, viruses must escape from and/or suppress the immune system by various strategies. An important strategy used by viruses is modulation of PAMP-induced immune responses. TLR signaling proceeds via two
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