475 research outputs found
How ICTs Raise Manufacturing Performance: Firm-level Evidence in Southeast Asia.
No full textThis paper examines the effects of information and communication technologies (ICTs) on business performance, using firm-level data obtained through a questionnaire survey in four ASEAN countries (Indonesia, The Philippines, Thailand and Vietnam). Sources of information and new technologies exchanged via ICTs by firms are also explored to investigate the mechanism behind ICT adoption. Empirical results verify that the introduction of ICT to reorganize business processes is significantly correlated with business performance, in particular the development of export markets and improvement of production management. ICTs facilitate access to information and technologies accumulated in in-house departments and joint-venture (JV) affiliates of the respondent firms. There are considerable differences between multinational companies (MNCs)/JVs and local firms. MNCs/JVs make use of information and technologies obtainable via ICTs from their own R&D departments, JVs established with local partners and foreign-owned suppliers/customers to improve factory management, mostly for product quality improvement and production cost reduction. In contrast, local firms interconnect their own R&D departments via ICTs to enhance their business performance in broader areas than MNCs/JVs, including the development of export markets.
ピカール群に対する 進指数写像について
No full text"Algebraic Number Theory and Related Topics 2013". December 9～13, 2013. edited by Tadashi Ochiai, Takeshi Tsuji and Iwao Kimura. The papers presented in this volume of RIMS Kôkyûroku Bessatsu are in final form and refereed.This is an announcement of results by the author[2], which will be submitted elsewhere. We sketch how a p-adic exponential map for the Picard group is defined for schemes proper and flat over the integer ring of a complete discrete valuation field of characteristic 0. The main ingredients are formal geometry and a property of coherent cohomology called the exchange property. An application to the Albanese map is included
On the Albanese cokernel of varieties over -adic fields (Algebraic Number Theory and Related Topics 2014)
No full text"Algebraic Number Theory and Related Topics 2014". December 1～5, 2014. edited by Takeshi Tsuji, Hiroki Takahashi and Yuichiro Hoshi. The papers presented in this volume of RIMS Kôkyûroku Bessatsu are in final form and refereed.This is an announcement of results by the author [4]. Let X be a smooth projective variety over a p-adic field K. In this article we present a conjectural formula describing the cokernel of the Albanese map of zero-cycles for X in terms of the N eron-Severi group and sketch a proof that it is true under additional assumptions on an integral model of X. The case where X is a curve has been settled by Lichtenbaum completely. We will also briefly mention the local-global problem for the Albanese-cokernel; the abelian group on the "local side" turns out to be a finite group
Characteristics of overlap region in high-Reynolds number turbulent channel flow
No full textDirect numerical simulation of the fully developed turbulent channel flows have been carried out at the Reynolds number based on the friction velocity and the channel half width, 2000, 4000 and 8000. A hybrid 10th order accurate finite difference scheme in the stream and spanwise directions, and a second-order scheme in the wall-normal direction is adapted as the spatial discretization method. We observed the plateau profiles in the indicator function corresponded to the von Karman constant. Furthermore, second peak of streamwise pre-multiplied spectra were appeared in the same wall normal height, 300 < y+ < 600, in case of Re = 4000. Nevertheless, the effects of the lager than the channel half height scale on the streamwise turbulent intensity are fixed contributions without dependence on Reynolds number. These results suggested that the new streamwise vortexes are formed between buffer layer and outer layer with increasing of Reynolds number
Mechanistic Investigations into the Palladium-Catalyzed Decarboxylative Allylic Alkylation of Ketone Enolates Using the PHOX Ligand Architecture
No full textPalladium-catalyzed asymmetric allylic alkylation has become a large and important field for chemical synthesis. Many methodologies in this field offer mild conditions under which challenging and important molecular features can be reliably synthesized, including chiral all-carbon quaternary stereocenters. As a result, palladium- catalyzed asymmetric allylic alkylation has found significant use in total synthesis, and growing use in industry. While the general process of palladium-catalyzed asymmetric allylic alkylation has been studied for decades, there have been a number of recent modifications and developments, such as asymmetric versions of decarboxylative allylic alkylation procedures that are not yet well understood. The development of future implementations and improvements to palladium-catalyzed asymmetric allylic alkylation and related methodologies is expected to be facilitated by a better understanding of these more recent developments, and thus further mechanistic investigation is warranted.
Reported herein is a set of investigations into the palladium-catalyzed decarboxylative asymmetric allylic alkylation of ketone enolates using the PHOX ligand architecture. By monitoring the reaction via 31P NMR, a series of previously unidentified key intermediates is discovered. Two representatives of these key intermediates are isolated and characterized. The solution behavior of these species under reaction-like conditions is studied along with a few novel and related complexes. The role of these intermediates and their impact on the behavior of the reaction and product formation is discussed. Previously confounding experimentally observed behavior for this methodology is rationalized via the properties elucidated for these discovered intermediates.</p
Skin friction factor and mean velocity profile measured in high-reynolds-number turbulent pipe flow
No full textA friction factor in a fully developed pipe flow is measured very accurately over wide range Reynolds number from 103 to 107 at the high Reynolds number facility in AIST,NMIJ. Also a velocity profile is measured by using a LDV up to 106. From the comparison between a velocity profile and the friction factor, we found that a log-law profile is well observed and Kármán constant is estimated to be 0.385. Based on the measurements, we present a new functional form of the friction factor which is consistent with mean velocity profile
Mixing characteristics with vacuum tetrode transistor
No full text本文データは学協会の許諾に基づきCiNiiから複製したものであるゲート電極一体型の窒化ハフニウムフィールドエミッタアレイ(HfN-FEA), コレクタ電極に加え, 制御電極からなる四極構造真空トランジスタを構成し, 周波数混合実験を行った. まずコレクタ電流の制御電極電庄に対する依存性を測定した. その結果エミッタ電圧が-60Vのとき制御電極電圧-40V〜-50Vにおいてコレクタ電流を線形に制御できる領域があることが明らかになった. この部分について考察を行い, 周波数混合の実現の可能性を示した. 以上の結果を利用してエミッタ及び制御電極に交流信号を入力して周波数混合実験を行い, 周波数混合が行われていることを確認した.Frequency mixing experiment was carried out with a vacuum tetrode transistor which was composed of a hafnium nitride fierd emitter array (HfN-FEA), a collector, and a control grid. Collector current was measured whether the control grid can control the collector current. This experiment showed that collector corrent varied with respect to the change in the voltage of the control grid . A sinusoidal wave with the frequency and voltage of 10 kHz and 2 V_ was inputted to the emitter. Another sinusoidal wave with the frequency and voltage of 15 kHz and 10 V_ was inputted to the control grid. As a result, output wave was mixture wave of input waves
Effects of Participatory and Physical Life Goals in a Preventive Care Program for Frail Community-Dwelling Older People: A Retrospective Cohort Study
No full textAbstract
Date Presented 3/31/2017
Life goals related to activities and participation had a more positive effect on frail older people’s health and quality of life than did life goals related to physical function and structure. The setting of meaningful goals may help to improve the effectiveness of preventive care programs.
Primary Author and Speaker: Yoshimi Yuri
Additional Authors and Speakers: Shinichi Takabatake, Yoko Tsuji, Yuri Fujii, Toshikatsu Kaneda, Yasuhiro Higashi, Hiroko Hashimoto, Kazuyo Nakaoka, Mari Oka</jats:p
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