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Search Results: 1 - 10 of 1117 matches for " Yuki Todo "
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A Study of Service Desk Setup in Implementing IT Service Management in Enterprises  [PDF]
Xiaojun Tang, Yuki Todo
Technology and Investment (TI) , 2013, DOI: 10.4236/ti.2013.43022
Abstract: Information Technology Service Management (ITSM) provides a framework to provide IT related services and the interaction of IT staff with users, and is often related with the British Government’s Information Technology Infrastructure Library (ITIL). ITIL offers a set of “best practices” for managing IT services and is one of the most widely accepted approaches to IT service management in the world. Recently, more and more enterprises implemented a centralized IT service management model based on the ITIL framework. However, even by adopting ITIL, most of the enterprises didn’t improve their IT service management level. Some factors become the barriers to the success of ITIL and ITSM implementation. In some cases, enterprises paid more attention to IT infrastructure setup and operation but neglect the importance of Service Desk. In this study, we first review ITSM, ITIL and Service Desk. Second, we identify a full function of new Service Desk and how to setup a good Service Desk. Enterprises should take proper measures in building a mature Service Desk to ensure successful implementation of ITSM.
Issue in Implementing Customer Operations Performance Center (COPC)  [PDF]
Yingyu Xu, Xinyuan Xi, Yuki Todo
Journal of Software Engineering and Applications (JSEA) , 2013, DOI: 10.4236/jsea.2013.68053

Customer Operations Performance Center Inc (COPC) is the world’s leading authority on Contact Center Operations Management. The COPC 2000 Standard is a comprehensive operating model for Contact Centre Operations. It is a world-wide benchmark and certification for contact centers. As well as an overall performance management system, COPC is designed to reduce costs, increase revenue, and improve service, quality and customer satisfaction. However, many COPC implementation projects failed. In this study, we first review the process of implementing COPC. Then, we identify major barriers in implementing COPC. Organizations should take proper measures in overcoming these barriers to ensure successful implementation of COPC.

Transfer-Matrix Study of Hard-Core Singularity for Hard-Square Lattice Gas
Synge Todo
Physics , 1997,
Abstract: A singularity on the negative fugacity axis of the hard-square lattice gas is investigated in terms of numerical diagonalization of transfer matrices. The location of the singular point $z_c^-$ and the critical exponent $\nu$ are accurately determined by the phenomenological renormalization technique as -0.11933888188(1) and 0.416667(1), respectively. It is also found that the central charge $c$ and the dominant scaling dimension $x_\sigma$ are -4.399996(8) and -0.3999996(7), respectively. These results strongly support that this singularity belongs to the same universality class as the Yang-Lee edge singularity ($c=-22/5, x_\sigma=-2/5 and \nu=5/12$).
Universal Reduction of Effective Coordination Number in the Quasi-One-Dimensional Ising Model
Synge Todo
Physics , 2006, DOI: 10.1103/PhysRevB.74.104415
Abstract: Critical temperature of quasi-one-dimensional general-spin Ising ferromagnets is investigated by means of the cluster Monte Carlo method performed on infinite-length strips, L times infty or L times L times infty. We find that in the weak interchain coupling regime the critical temperature as a function of the interchain coupling is well-described by a chain mean-field formula with a reduced effective coordination number, as the quantum Heisenberg antiferromagnets recently reported by Yasuda et al. [Phys. Rev. Lett. 94, 217201 (2005)]. It is also confirmed that the effective coordination number is independent of the spin size. We show that in the weak interchain coupling limit the effective coordination number is, irrespective of the spin size, rigorously given by the quantum critical point of a spin-1/2 transverse-field Ising model.
An Empirical Investigation of Common Sense of Land Use from a Statistical Approach  [PDF]
Yuki Hanashima
Journal of Geographic Information System (JGIS) , 2012, DOI: 10.4236/jgis.2012.42014
Abstract: Recently, ontological study has been one of the key concerns of geographic information science, a number of studies have been conducted in both of philosophical and knowledge engineering approach. Some studies pointed out the importance of human cognition and social context for development of ontologies. This paper presents empirical investigation of common sense of land use categories for development of suitable ontologies for each cultural or speech communities. Distinctions and characteristics in perceiving land use categories were described by a psychological method that was submitted to Japanese graduate and undergraduate students. In addition the results were analyzed using corresponddence analysis, a statistical technique for categorical data. This analysis serves to clarify the dominant determining factors for land use categories.
The Present Situation of IT Outsourcing and Countermeasure  [PDF]
Xinyuan Xi, Yingyu Xu, Hiroyushi Todo
Journal of Software Engineering and Applications (JSEA) , 2013, DOI: 10.4236/jsea.2013.68052

With the market competition intensifies, enterprises focusing on core business has become the most important rules of survival. Therefore, more and more enterprises adopt outsourcing as critical business initiatives due to its effectively reduce costs, enhancing the core competitiveness of enterprises and other characteristics. Duroc, a famous American management scholars had predicted: In ten to fifteen years within any business background to support not only to do the work of creating turnover should be outsourced. Do what you do best (your core competency) and outsource the rest. It has become an irreversible trend. In this paper, we will introduce the business value of IT outsourcing, discuss IT outsourcing industrys strengths and weaknesses, finally we will provide corresponding countermeasures based on the discussion.

Effects of Hip Arthroplasties on Bone Adaptation in Lower Limbs: A Computational Study  [PDF]
Abdul Halim Abdullah, Mitsugu Mitsugu Todo
Journal of Biosciences and Medicines (JBM) , 2015, DOI: 10.4236/jbm.2015.34001

Gait disorders contribute to the risk of falls and successive injuries, especially to elderly populations. The risk of falls becomes higher for hip osteoarthritis (OA) and hip arthroplasties patients due to poor balancing and gait impairment. Bone adaptation and bone loss are fundamental issues in considering the changes of bone behavior and gait pattern. In this study, computational analysis of the lower limbs was conducted to estimate the bone adaptation after hip arthroplasties procedure. 3D inhomogeneous model of lower limb was developed from computed topography (CT- based) data of 79 years old patient with hip osteoarthritis problem in left limb. Two types of arthroplaties were constructed in the left limb, namely total hip arthroplasty and resurfacing hip arthroplasty using commercial biomedical software, Mechanical Finder v6.1. Prosthesis stem and acetabular cup of THA were modelled as titanium alloy material (E = 114 GPa, v = 0.34), femoral ball and bearing insert as alumina properties (E = 370 GPa, v = 0.22). Meanwhile, RHA implant was assigned as Co-Cr-Mo material (E = 230 GPa, v = 0.30). Contact between both implants and bone were considered to be perfectly bonded at the interface. A load case of quiet standing position was conducted in this analysis with 60 kg of the patients’ body weight. The load was applied at the cross sectional lumbar vertebra and fixed at the distal of femoral shafts. Results show different patterns of stress distribution in right and left (operated) limbs for hip OA, THA and RHA models. An indication of stress alteration on both limbs after arthroplasties suggested that the bone adaptation occurred. The higher percentage of change in the left limb projected that the adaptation was more critical in operated limb.

The cryptochromes
Chentao Lin, Takeshi Todo
Genome Biology , 2005, DOI: 10.1186/gb-2005-6-5-220
Abstract: Cryptochromes are receptors for blue and ultraviolet (UV-A) light that share sequence similarity to DNA photolyases, DNA-repair enzymes that use blue light to repair UV-induced DNA damage by removing pyrimidine dimers from DNA [1]; cryptochromes have no photolyase activity, however [1-4]. There are two types of DNA photolyase, which repair different types of damage: CPD photolyases repair cyclobutane pyrimidine dimers (CPDs), and 6-4 photolyases repair 6-4 pyrimidine pyrimidone photoproducts. These photolyases together with the cryptochromes make up the photolyase/cryptochrome superfamily [5]. According to their sequence similarities, cryptochromes from a range of organisms can be clustered, more or less, into three subfamilies (Figure 1): plant cryptochromes, animal cryptochromes and cryptochrome-DASH proteins (CRY-DASH; see below).Cryptochromes are widely distributed in bacteria and eukaryotes but are not found in archaea, although archaea do have a CPD photolyase (see Figure 1). The first cryptochrome gene to be identified was Arabidopsis CRY1 [6], and cryptochromes were soon found by homology in other plant species and in animals. Soon after the cloning of the first 6-4 photolyase from Drosophila [7,8], a related sequence was discovered in the human expressed sequence tag (EST) databases that proved to encode human cryptochrome 1 (hCry1) [8,9]. Cryptochromes have now been found in various animal lineages, including insects, fish, amphibians, and mammals. Animal cryptochromes act as components of the circadian clock that control daily physiological and behavioral rhythms and as photoreceptors that mediate entrainment of the circadian clock to light [3].It was initially thought that only higher eukaryotes had cryptochromes and that prokaryotes had photolyases but not cryptochromes, but further searches of the more recently available genome databases revealed the presence of a cryptochrome gene in cyanobacteria (Synechocystis) [10]. This new type of cryptochrome wa
Improved chain mean-field theory for quasi-one-dimensional quantum magnets
Synge Todo,Akira Shibasaki
Physics , 2008, DOI: 10.1103/PhysRevB.78.224411
Abstract: A novel mean-field approximation for quasi-one-dimensional (Q1D) quantum magnets is formulated. Our new mean-field approach is based on the Bethe-type effective-field theory, where thermal and quantum fluctuations between the nearest-neighbor chains as well as those in each chain are taken into account exactly. The self-consistent equation for the critical temperature contains the boundary-field magnetic susceptibilities of a multichain cluster, which can be evaluated accurately by some analytic or numerical methods, such as the powerful quantum Monte Carlo method. We show that the accuracy of the critical temperature of Q1D magnets as a function of the strength of interchain coupling is significantly improved, compared with the conventional chain mean-field theory. It is also demonstrated that our new approximation can predict nontrivial dependence of critical temperature on the sign (i.e., ferromagnetic or antiferromagnetic) of interchain coupling as well as on the impurity concentration in randomly diluted Q1D Heisenberg antiferromagnets.
Geometric Allocation Approach for Transition Kernel of Markov Chain
Hidemaro Suwa,Synge Todo
Physics , 2011,
Abstract: We introduce a new geometric approach that constructs a transition kernel of Markov chain. Our method always minimizes the average rejection rate and even reduce it to zero in many relevant cases, which cannot be achieved by conventional methods, such as the Metropolis-Hastings algorithm or the heat bath algorithm (Gibbs sampler). Moreover, the geometric approach makes it possible to find not only a reversible but also an irreversible solution of rejection-free transition probabilities. This is the first versatile method that can construct an irreversible transition kernel in general cases. We demonstrate that the autocorrelation time (asymptotic variance) of the Potts model becomes more than 6 times as short as that by the conventional Metropolis-Hastings algorithm. Our algorithms are applicable to almost all kinds of Markov chain Monte Carlo methods and will improve the efficiency.
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