16 research outputs found
Determinants of EDI (Electronic Data Interchange) Adoption and Integration in the US and Japanese Automobile Suppliers
This paper examines determinants of EDI adoption and integration in the US and Japanese automobile suppliers. The paper constructs several hypotheses based on the transaction-cost and resource- dependence approaches, and tests these hypotheses by using data from the automobile suppliers. Our study shows: (1) the resource-dependence approach seemed more effective in explaining EDI adoption, while the transaction-cost approach seemed more effective in explaining EDI integration; (2) the transaction-cost approach seemed more suited to the US context, while the resource-dependence approach seemed more suited to the Japanese context; (3) EDI adoption and EDI integration had positive impacts on EDI performance in the US, suggesting the higher validity of our framework in the US.Electronic Data Interchange (EDI), Business-to-Business Electronic Commerce, Automotive Industry, Automobile Suppliers, Technology Adoption
Estimation of standard molar entropy of cement hydrates and clinker minerals
It is not straightforward to experimentally measure the standard molar entropy of cement hydrates or clinker minerals. This is further compounded by the controversies surrounding the entropy values reported in established thermodynamic datasets for cements. The purpose of this study is to assess the reliability of standard entropies compiled in those datasets. To this end, a simple but robust method is used in which the standard entropy of an inorganic solid is correlated to its formula unit volume via a linear equation. The results of this analysis show that the standard entropies and/or molar volumes (and in cases solubility products) of the following phases deserve closer scrutiny: meta-ettringite phases; magnesium/aluminium layered double hydroxide solid solutions; almost all iron-bearing monosulfate and hydrogarnet phases; and several calcium silicate hydrate solid solution end-members. In addition, this study reports the provisional estimates for the standard entropies of minerals ternesite and ye'elimite
Strategic management of technology in Japanese firms: Literature review
This paper reviews literature on strategic management of technology in Japanese firms. The paper is divided into five sections, namely: 1 technology strategy 2 inter-firm technological relations 3 knowledge management 4 new product development 5 Japanese innovation system and policy. We examine literature on technology strategy, including, general strategy, studies on de facto standard, global technology strategy, and studies on small high-tech firms. Then, we investigate inter-firm relations, such as keiretsu and supplier management, technological alliances, spin-offs, and R&D consortia. Finally, we review studies on new product development processes and tools, and technology policy, followed by implications for further research. Copyright © 2005 Inderscience Enterprises Ltd
Oculomotor Nerve Palsy Associated with Rupture of Middle Cerebral Artery Aneurysm
Oculomotor nerve palsy (ONP) with subarachnoid hemorrhage (SAH) occurs usually when oculomotor nerve is compressed by growing or budding of posterior communicating artery (PcoA) aneurysm. Midbrain injury, increased intracranial pressure (ICP), or uncal herniation may also cause it. We report herein a rare case of ONP associated with SAH which was caused by middle cerebral artery (MCA) bifurcation aneurysm rupture. A 58-year-old woman with clear consciousness suffered from headache and sudden onset of unilateral ONP. Computed tomography showed SAH caused by the rupture of MCA aneurysm. The unilateral ONP was not associated with midbrain injury, increased ICP, or uncal herniation. The patient was treated with coil embolization, and the signs of oculomotor nerve palsy completely resolved after a few days. We suggest that bloody jet flow from the rupture of distant aneurysm other than PcoA aneurysm may also be considered as a cause of sudden unilateral ONP in patients with SAH
A spectroscopic thermometer: individual vibrational band spectroscopy with the example of OH in the atmosphere of WASP-33b
Individual vibrational band spectroscopy presents an opportunity to examine
exoplanet atmospheres in detail by distinguishing where the vibrational state
populations of molecules differ from the current assumption of a Boltzmann
distribution. Here, retrieving vibrational bands of OH in exoplanet atmospheres
is explored using the hot Jupiter WASP-33b as an example. We simulate
low-resolution spectroscopic data for observations with the JWST's NIRSpec
instrument and use high resolution observational data obtained from the Subaru
InfraRed Doppler instrument (IRD). Vibrational band-specific OH cross section
sets are constructed and used in retrievals on the (simulated) low and (real)
high resolution data. Low resolution observations are simulated for two
WASP-33b emission scenarios: under the assumption of local thermal equilibrium
(LTE) and a toy non-LTE model for vibrational excitation of selected bands. We
show that mixing ratios for individual bands can be retrieved with sufficient
precision to allow the vibrational population distributions of the forward
models to be reconstructed. A simple fit for the Boltzmann distribution in the
LTE case shows that the vibrational temperature is recoverable in this manner.
For high resolution, cross-correlation applications, we apply the individual
vibrational band analysis to an IRD spectrum of WASP-33b, applying an
'un-peeling' technique. Individual detection significances for the two
strongest bands are shown to be in line with Boltzmann distributed vibrational
state populations consistent with the effective temperature of the WASP-33b
atmosphere reported previously. We show the viability of this approach for
analysing the individual vibrational state populations behind observed and
simulated spectra including reconstructing state population distributions.Comment: Submitted for publication in A