195 research outputs found

    Enhancing the ESIM (Embedded Systems Improving Method) by Combining Information Flow Diagram with Analysis Matrix for Efficient Analysis of Unexpected Obstacles in Embedded Software

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    In order to improve the quality of embedded software, this paper proposes an enhancement to the ESIM (Embedded Systems Improving Method) by combining an IFD (Information Flow Diagram) with an Analysis Matrix to analyze unexpected obstacles in the software. These obstacles are difficult to predict in the software specification. Recently, embedded systems have become larger and more complicated. Theoretically therefore, the development cycle of these systems should be longer. On the contrary, in practice the cycle has been shortened. This trend in industry has resulted in the oversight of unexpected obstacles, and consequently affected the quality of embedded software. In order to prevent the oversight of unexpected obstacles, we have already proposed two methods for requirements analysis: the ESIM using an Analysis Matrix and a method that uses an IFD. In order to improve the efficiency of unexpected obstacle analysis at reasonable cost, we now enhance the ESIM by combining an IFD with an Analysis Matrix. The enhancement is studied from the following three viewpoints. First, a conceptual model comprising both the Analysis Matrix and IFD is defined. Then, a requirements analysis procedure is proposed, that uses both the Analysis Matrix and IFD, and assigns each specific role to either an expert or non-expert engineer. Finally, to confirm the effectiveness of this enhancement, we carry out a description experiment using an IFD.14th Asia-Pacific Software Engineering Conference (APSEC\u2707), 4-7 Dec. 2007, Aichi, Japa

    Visual Explanation of Deformation Theories in Shape Analysis

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    In the paper we explain the deformation theories in shape analysis. The Geometry Driven Statistics offers a new horizon of the statistical methods. Using a thin-plate interpolation, the given configuration with landmark coordinates is featured by the principal warps which are eigenvectors of the bending energy matrix. In addition, the deformation between two configurations can be described by an affine transformation component and a non-affine transformation. The non-affine transformation can be described by partial warps. Seeing the partial warps help a lot us to understand the features of the deformation. We apply the deformation theories to a tiny economics deformation analysis. The concrete example will be helpful so that economics students can understand the deformation theories. In addition, the way of applying the shape analysis method is explained through the concrete example

    Web Publication of Three-Dimensional Animation Materials for Business Mathematics : 10 Graphics for Economics Mathematics Part 2

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    The paper reports our web publication of visual teaching materials for business mathematics. The objective of the web site is to familiarize students with our visual approach for business mathematics at early stage, The significant advantage of visualization is that seeing the materials leads to better understanding of the mathematical process. Even if the students cannot understand the algebraic calculation process, they can intuitively understand the essence, only seeing the visual materials. The feature of our developed teaching materials is utilization of three-dimensional graphics and its animations. Just watching the animation, students can see the points, even if they have no idea about operations on the web. In the paper, we will illustrate three typical economics problems using three-dimensional animation which are a national income determination problem, an IS-LM analysis, and a Marshallian demand function

    Webジョウ ノ クチコミ ジョウホウ カラ ノ センザイテキ ジゼン キタイ ノ ハッケン @コスメ ニオケル マスカラ ノ ヒョウバン ブンセキ

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    本稿では,経営者のための,初期費用がかからず,対費用効果の高い口コミ分析手法を提案する。提案手法の特徴は,評判の全容の俯瞰,及び潜在的事前期待の発見,ホリスティックな視点からの有益コメントの発見である。その適応事例として@コスメのマスカラの口コミ分析を行った。そして潜在的事前期待として,「まつげへのダメージ回避」,「まつげへのトリートメント効果」を,また,ホリスティックな有益情報として「他のベース化粧品との組合せ」などが発見できた。また,この手法とLSAによる分析結果の比較を行ない,分析の本質的な部分は度数分布であり,本提案手法でも把握可能なことを示した。経営者の本当に欲している情報とは,顧客の潜在的事前期待であり,画期的な商品機能改善や,新商品の開発に結び付く未知の機能,サービスであろう。本稿で我々が提案した分析手法は,簡単な方法ではあるが,こうした経営者のニーズに応えている

    サイケン スウガク ノ ビジュアル ナ キョウジュホウ

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    本稿では,債券に関する数学,債券数学(Bond Mathematics)をビジュアルなアプローチで教授する方法について述べる.題材は,確定利付き債券の価格関数の特徴説明,および,イミュニゼーションである。これらは金融工学の基礎知識として重要なものである。ビジュアルアプローチの導入により,債券価格関数を多変数関数から次元を落として説明していくことで,学生は体系的な理解が得られる。また,イミュニゼーションの連立方程式もビジュアルな教材により,デュレーションおよびコンベキシティを説明すると,理解が深まる

    Blue Monday Phenomenon among Men:Suicide Deaths in Japan

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    The number of suicide deaths in Japan has continued to be high, and is a pressing social problem. Although the weekly distribution of suicide deaths has been documented, no nationwide analysis has yet been conducted. In the present study, the ratios of the number of suicide deaths per day, by day of the week, and on weekdays relative to holidays were calculated using the data for all suicide deaths recorded in 2003. The suicide deaths recorded on holidays were treated as the reference, and a confidence interval of 95% (95% CI) was used. We calculated the suicide death ratios among men and women of all ages (men:23,396, women:8,713, total:32,109) and also among those of productive age (age:15-64 years, men:18,552, women:5,481, total:24,033). Among men of all ages, the suicide death ratio on Mondays was found to be significantly high at 1.49 (95% CI:1.04-2.14), and the ratios were found to decrease over the course of the week from Monday to Friday. On each weekday, the suicide death ratios among men of productive age were found to be higher than those among men of all ages. Among women, the suicide death ratios on any weekday were found to be higher than 1, but there was no significant difference between the days. Among both men and women, the number of suicide deaths on holidays was lower than that on weekdays. This study revealed that the number of suicide deaths recorded per day on Mondays is 1.5 times higher than that on holidays among men. This suggests that the structure of the work week may possibly influence suicide deaths among men. Future discussions regarding the arrangement and distribution of weekly holidays should be conducted in order to reduce the number of suicide deaths.</p
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