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Search Results: 1 - 10 of 1170 matches for " and Akihiko Kubo "
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A Kano Model based Computer System for Respondents Determination: Customer needs analysis for Product Development Aspects
Md Mamunur Rashid,Jun'ich Tamaki,Sharif Ullah,Akihiko Kubo
Management Science and Engineering , 2010,
Abstract: The first step to develop a product is to identify a set of customer needs. In this regard, Kano model is often used. Using Kano model, a product developer can identify whether or not a product attribute is attractive, must-be, or alike. To do so, it is important to obtain customers' opinions using a prescribed questionnaire. This raises a fundamental question that is how many customers should be asked to make a reliable conclusion. We have developed a system that simulates customer answers in accordance with Kano model. We have used the system to know the minimal number of customers needed to determine whether or not a product attribute is attractive, must-be, reverse, or alike. We intend to show the results related to the abovementioned issue and discuss how to integrate the system into a real-life product development process. Key words: Virtual Customer; Computer System; Product Development; Kano Model
Phase Diagram of Spinless Fermions on an Anisotropic Triangular Lattice at Half-filling
Chisa Hotta,Nobuo Furukawa,Akihiko Nakagawa,Kenn Kubo
Physics , 2006, DOI: 10.1143/JPSJ.75.123704
Abstract: The strong coupling phase diagram of the spinless fermions on the anisotropic triangular lattice at half-filling is presented. The geometry of inter-site Coulomb interactions rules the phase diagram. Unconventional charge ordered phases are detected which are the recently reported pinball liquid and the striped chains. Both are induced by the quantum dynamics out of classical disordered states and afford extremely correlated metallic states and the particular domain wall-type of excitations, respectively. The disorder once killed by the quantum effect revives at the finite temperature, which is discussed in the terms of the organic $\theta$-ET$_2X$.
Solvent Vapor Treatment Effects on Poly(3-hexylthiophene) Thin Films and its Application for Interpenetrating Heterojunction Organic Solar Cells
Tetsuro Hori,Varutt Kittichungchit,Hiroki Moritou,Hitoshi Kubo,Akihiko Fujii,Masanori Ozaki
Materials , 2010, DOI: 10.3390/ma3114939
Abstract: The solvent vapor treatment (SVT) for poly(3-hexylthiophene) (PAT6) films and its application to interpenetrating heterojunction organic solar cells have been studied. It was found that SVT could improve the crystallinity and electrical characteristics of the PAT6 films. We fabricated organic solar cells with an interpenetrating structure of PAT6 and fullerenes utilizing the SVT process, and discuss the improved performance of the solar cells by taking the film crystallinity, optical properties, and morphology into consideration.
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, Jun’ichi 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.
Dysregulation of Suppressor of Cytokine Signaling 3 in Keratinocytes Causes Skin Inflammation Mediated by Interleukin-20 Receptor-Related Cytokines
Ayako Uto-Konomi, Kosuke Miyauchi, Naoko Ozaki, Yasutaka Motomura, Yoshie Suzuki, Akihiko Yoshimura, Shinobu Suzuki, Daniel Cua, Masato Kubo
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0040343
Abstract: Homeostatic regulation of epidermal keratinocytes is controlled by the local cytokine milieu. However, a role for suppressor of cytokine signaling (SOCS), a negative feedback regulator of cytokine networks, in skin homeostasis remains unclear. Keratinocyte specific deletion of Socs3 (Socs3 cKO) caused severe skin inflammation with hyper-production of IgE, epidermal hyperplasia, and S100A8/9 expression, although Socs1 deletion caused no inflammation. The inflamed skin showed constitutive STAT3 activation and up-regulation of IL-6 and IL-20 receptor (IL-20R) related cytokines, IL-19, IL-20 and IL-24. Disease development was rescued by deletion of the Il6 gene, but not by the deletion of Il23, Il4r, or Rag1 genes. The expression of IL-6 in Socs3 cKO keratinocytes increased expression of IL-20R-related cytokines that further facilitated STAT3 hyperactivation, epidermal hyperplasia and neutrophilia. These results demonstrate that skin homeostasis is strictly regulated by the IL-6-STAT3-SOCS3 axis. Moreover, the SOCS3-mediated negative feedback loop in keratinocytes has a critical mechanistic role in the prevention of skin inflammation caused by hyperactivation of STAT3.
Cyclosporin A inhibits the growth of neonatal MHC-expressing myotubes independent of NFATc1 and NFATc3 in the mechanically overloaded soleus muscle of mice  [PDF]
Kunihiro Sakuma, Akihiko Yamaguchi
American Journal of Molecular Biology (AJMB) , 2011, DOI: 10.4236/ajmb.2011.11002
Abstract: ABSTRACT The molecular signaling pathway linked to hyper-trophy of the anti-gravity/postural soleus muscle af-ter mechanical overloading has not been identified. Using Western blot and immunohistochemical analy-ses, we investigated whether the amounts of NFATc3, GSK-3?, NFATc1, and neonatal MHC change in the mechanically overloaded soleus muscle after cyc-losporine A (CsA) treatment. Adult male ICR mice were subjected to a surgical ablation of the gas-trocnemius muscle and treated with either CsA (25 mg/Kg) or vehicle once daily. They were sacrificed at 2, 4, 7, 10, and 14 days post-injury. Mechanical over-loading resulted in a significant increase in the wet weight and the cross-sectional area of slow and fast fibers of the soleus muscle in placebo-treated mice but not CsA-treated mice. After 4 days of mechanical overloading, we observed a similar co-localization of neonatal MHC and NFATc3 in several myotubes of both mice. The placebo-treated mice possessed larger myotubes with neonatal MHC than CsA-treated mice. At 7 days, mechanical overloading induced marked expression of neonatal MHC in myotubes and/or myofibers. Such neonatal MHC-positive fibers emerged less often in the hypertrophied soleus mus-cle subjected to treatment with CsA. CsA treatment did not significantly change the amount of GSK-3? protein in the soleus muscle. The modulation of growth in neonatal MHC-positive myofibers by CsA treatment may inhibit the hypertrophic process in the soleus muscle after mechanical overloading.
Selection of Suitable Safety Activities and Experience of Safety Condition Establishment  [PDF]
Akihiko Hidaka, Atsumi Miyake
Open Journal of Safety Science and Technology (OJSST) , 2015, DOI: 10.4236/ojsst.2015.51001
Abstract: In recent years, Japanese manufacturing firms have been building factories in the developing countries of Southeast Asia and employing local personnel. Using local employees who were basically people of the agricultural countries implies difficulties in both technical and safety terms. This study examines how quickly and effectively the companies going into the developing countries establish a standard of safety. The authors focus on Vietnam and Thailand as representative countries. To their surprise, the authors find that all 27 companies that answered their questionnaire had introduced “5S activities” at startup and were continuing to use them. In addition, nearly 80% of the companies began using “KY activities”, “Safety proposal activities”, and “Examinations of accidents” soon after startup. One of the authors Akihiko Hidaka, when serving as the president of the Thai subsidiary of a Japanese chemical company, developed safety activities to reduce work-related accidents. And he knew that the kinds of safety activities he developed were same as above 4 activities. So he evaluated these activities and judged them to be effective. The authors conclude that “5S activities”, “KY activities”, “Safety proposal activities”, and “Examinations of accidents” were the activities best able to improve safety effectively and quickly in developing countries. The authors describe the safety activities carried out at the Thai company and then describe the most important features of the methods used to establish safety conditions at the firm.
Toward Circumventing Collinearity Effect in Nonlinear Spectral Mixture Analysis by Using a Spectral Shape Measure  [PDF]
Wei Yang, Akihiko Kondoh
Advances in Remote Sensing (ARS) , 2016, DOI: 10.4236/ars.2016.53015
Abstract: Nonlinear spectral mixture analysis (NSMA) is a widely used unmixing algorithm. It can fit the mixed spectra adequately, but collinearity effect among true and virtual endmembers will decrease the retrieval accuracies of endmember fractions. Use of linear spectral mixture analysis (LSMA) can effectively reduce the degree of collinearity in the NSMA. However, the inadequate modeling of mixed spectra in the LSMA will also yield retrieval errors, especially for the cases where the multiple scattering is not ignorable. In this study, a generalized spectral unmixing scheme based on a spectral shape measure, i.e. spectral information divergence (SID), was applied to overcome the limitations of the conventional NSMA and LSMA. Two simulation experiments were undertaken to test the performances of the SID, LSMA and NSMA in the mixture cases of treesoil, tree-concrete and tree-grass. Results demonstrated that the SID yielded higher accuracies than the LSMA for almost all the mixture cases in this study. On the other hand, performances of the SID method were comparable with the NSMA for the tree-soil and tree-grass mixture cases, but significantly better than the NSMA for the tree-concrete mixture case. All the results indicate that the SID method is fairly effective to circumvent collinearity effect within the NSMA, and compensate the inadequate modeling of mixed spectra within the LSMA.
Risk Assessment of Land Subsidence in Kathmandu Valley, Nepal, Using Remote Sensing and GIS  [PDF]
Richa Bhattarai, Akihiko Kondoh
Advances in Remote Sensing (ARS) , 2017, DOI: 10.4236/ars.2017.62010
Abstract: Land subsidence is identified as a global problem and intensive studies are being conducted worldwide to detect and monitor risk of this problem. Risk assessment of land subsidence is simply an evaluation of the probability and frequency of occurrence of land subsidence, exposure of people and property to the subsidence and consequence of that exposure. Remote sensing technology was used to extract information of land subsidence in Kathmandu Valley, Nepal. Also, Disaster Risk Index method and Analytic Hierarchy Process (AHP) along with Geographic Information System (GIS) tools were used to assess risk of land subsidence in Kathmandu Valley, Nepal. Subsidence volume for locations Central Kathmandu, Chauni, Lalitpur, Imadol, Thimi, Madhyaour Thimi, New Baneshwor, Koteshwor and Gothatar was calculated using a simple mathematical formula. The subsidence depth for these locations was found to be in a range of 1 cm to 17 cm and the maximum subsidence velocity was found to be 4.8 cm/yr. This study revealed that the location where maximum subsidence was observed (i.e. Central Kathmandu and Lalitpur) was found to be at high risk of experiencing land subsidence induced damage. Other location where subsidence was observed was found to be at medium risk and the rest of the Kathmandu valley was found to be at low risk with current data situation. This study can be considered as the first step towards other comprehensive study relating to land subsidence risk assessment. The outcome of this research provides a basic understanding of the current situation that can further assist in developing prevention and risk management techniques.
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