404 research outputs found
The Experience of Adopting MES by Taiwan IC Foundry Operators
MES (Manufacturing Execution System) is a computer application system that integrates all relevant real-time information along every step in a manufacturing process. MES functions include data collection, WIP (Work in Process) tracking, material management, inventory management, exception management, and quality management etc.
IC manufacturing has over 300 fabrication processes, prohibitively expensive equipment, a large variety of products, and short product life cycle. MES, therefore, is essential for IC foundry manufacturers for gathering real-time production line information, supporting manufacturing decision making, and increasing manufacturing efficiency.
Taiwan IC manufacturers have invested in MES over the past few years. For this study we interviewed managers from Taiwan’s leading IC manufacturers responsible for implementing MES systems. Their MES adoption experiences and suggestions could benefit other IC manufacturers as well as manufacturers of other industry sectors
Scanning Near-shore Intertidal Terrain Using Ground LiDAR
Intertidal zone refers to the area under and above the water during high and low tides. Traditionally, this zone is not within the scope of land management authorities. Moreover, in accordance with principals set out by existing plans, intertidal zones are excluded from management zones. Boundaries should therefore be set at the land and sea border. Traditionally, methods in determining this have included the traditional theodolite (total station) method, mapping and aerial photography (photogrammetry). However, existing operational restrictions lower efficiency, in addition to increasing time and operational costs. Therefore this paper explores the practicality of a user-
friendly, ground-based high resolution laser scanning technology. This method offers easy operation and high-density characteristics with an instrument platform that can be installed on elevated rooftops. High accuracy and resolution is achieved using a stop-and-go method producing Digital Terrain Model (DTM) data. The range of the completed data is 61km in length, 2.5km in width, and -0.5m depth, with a sampling error of approximately ±2cm. Through the implementation discussed in this research, accurate information about the changes of topography in intertidal areas can be obtained
Improvement of LiDAR Data Accuracy Using 12 Parameter Affine Transformation
LiDAR data in a local coordinate system may need to be georeferenced and converted into a geographic or projected system. In coordinate transformation, the 7-parameter Helmet transformation method is usually used in measurements to eliminate the systematic errors made by a laser scanner. However, 7-parameter coordinate transformation assumes that there is only one scale error in all of the systematic errors. This study used 12 parameter affine transformation for coordinate transformation of airborne LiDAR data and terrestrial LiDAR data. The LiDAR data accuracy results upon 6-parameter similarity transformation, 7-parameter similarity transformation, and 12-parameter affine transformation were compared. The results showed that using 12-parameter affine transformation the airborne LiDAR and terrestrial LiDAR data have 2-3 times greater accuracy than do 7-parameter or 6-parameter transformations
The microbiological profile and presence of bloodstream infection influence mortality rates in necrotizing fasciitis
Land Subsidence Caused by Groundwater Exploitation in Yunlin, Taiwan
Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchive
Enhancing the in vivo transdermal delivery of gold nanoparticles using poly(ethylene glycol) and its oleylamine conjugate
VI-Band Follow-Up Observations of Ultra-Long-Period Cepheid Candidates in M31
The ultra-long period Cepheids (ULPCs) are classical Cepheids with pulsation
periods exceeding days. The intrinsic brightness of ULPCs are ~1
to ~3 mag brighter than their shorter period counterparts. This makes them
attractive in future distance scale work to derive distances beyond the limit
set by the shorter period Cepheids. We have initiated a program to search for
ULPCs in M31, using the single-band data taken from the Palomar Transient
Factory, and identified eight possible candidates. In this work, we presented
the VI-band follow-up observations of these eight candidates. Based on our
VI-band light curves of these candidates and their locations in the
color-magnitude diagram and the Period-Wesenheit diagram, we verify two
candidates as being truly ULPCs. The six other candidates are most likely other
kinds of long-period variables. With the two confirmed M31 ULPCs, we tested the
applicability of ULPCs in distance scale work by deriving the distance modulus
of M31. It was found to be mag. The large error
in the derived distance modulus, together with the large intrinsic dispersion
of the Period-Wesenheit (PW) relation and the small number of ULPCs in a given
host galaxy, means that the question of the suitability of ULPCs as standard
candles is still open. Further work is needed to enlarge the sample of
calibrating ULPCs and reduce the intrinsic dispersion of the PW relation before
re-considering ULPCs as suitable distance indicators.Comment: 13 pages, with 14 Figures and 4 Tables (one online table). AJ
accepte
Major interventions are associated with survival of out of hospital cardiac arrest patients - a population based survey
Background. The overall survival rate of
out-of-hospital cardiac arrest (OHCA)
in Taiwan or even in the whole of Asia
is relatively low. Major interventions,
such as target temperature management
(TTM), coronary artery angiography, and
extracorporeal membrane oxygenation
(ECMO), have been associated with better
patient outcome. However, studies in Taiwan
revealing evidence of the benefits of
these interventions are limited.
Methods. A population-based study used
an 8-year database to analyze overall survival
and risk factors ˝among OHCA patients.
All adult non-trauma OHCA patients
were identified through diagnostic
and procedure codes. Hospital survival
and return of spontaneous circulation
(ROSC) were primary and secondary outcomes.
Logistic regression and Cox regression
analyses were conducted.
Results. There was a relationship between
major interventions (including TTM,
coronary artery angiography, and ECMO)
and better hospital survival. Age, income,
major interventions, and acute myocardial
infarction history were associated with
hospital survival. The adjusted hazard
ratios (HRs) were 0.406 (95% CI, 0.295
to 0.558), 1.109 (95% CI, 1.027 to 1.197),
1.075 (95% CI, 1.002 to 1.154), 1.097 (95%
CI, 1.02 to 1.181) and 0.799(95% CI, 0.677
to 0.942) for patients with major interventions,
age≥50, medium low and low income,
middle income, and acute myocardial
infarction history, respectively.
Conclusion. This population-based study
in Taiwan revealed that older age (≥50),
medium low and low income were associated
with a lower rate of survival. Major
interventions, including TTM, coronary
angiography, and ECMO, were related to
better survival
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