Showing papers by "Fu Jen Catholic University published in 1994"
TL;DR: In this paper, the authors studied the variation of expected returns on five different asset portfolios in a multi-factor model and found the presence of a real estate factor, in addition to both a stock factor and a bond factor in asset pricing.
Abstract: In this paper, we study the variation of expected returns on five different asset portfolios in a multi-factor model. We found the presence of a real estate factor, in addition to both a stock factor and a bond factor in asset pricing. This suggests that mutual fund managers should seriously consider including real estate assets in their portfolios, since one cannot capture the real estate factor premium without having some kind of real estate exposure. Another result is that the market segmentation found in previous studies disappears in a more general model of asset pricing in which we allow for multi-factors other than the market factor to affect asset returns. This implies that real estate assets can be treated just like other assets as far as mean-variance efficient asset allocations are concerned. We also have some preliminary evidence that equity REITs and the Russell-NCREIF index are driven by the same underlying real estate factor.
152 citations
TL;DR: Several extraction, separation and detection methods for cholesterol oxidation products (COPS) were developed and evaluated using liquid chromatography as mentioned in this paper, and the results showed that extraction of COPS from lard by cold saponification at 25°C or a SepPak C18 cartridge resulted in higher recoveries than those given by a silica gel Sep-Pak cartridge.
53 citations
TL;DR: Data support the hypothesis that excess arginine selectively destroys acinar cells and suggested that necrosis arises from attenuation in nucleoprotein synthesis which may result from amino acid imbalance and/or toxicity.
43 citations
TL;DR: In this paper, the authors report the results of a study in the newly established Penghu National Scenic Area in the Republic of China (Taiwan), where data were collected using a standardized tourism impact attitude scale which was translated from English to Chinese.
42 citations
TL;DR: In this paper, the polypyrrole for nitrite and nitrate ions can be exploited for use in ion sensing using modern microsensor fabrication technique, which has led to the development of a highly stable, sensitive and fast-response sensor for nitrate and nitrite ions.
28 citations
TL;DR: In this article, methanol-based, binary and ternary solvent systems were compared with respect to resolution of cis isomers of α and β-carotene by reversed-phase HPLC.
Abstract: Various methanol-based, binary and ternary solvent systems were compared with respect to resolution of cis isomers of α and β-carotene by reversed-phase HPLC. A ternary system: acetonitrile-methanol-methylene chloride (75∶15∶10), or a binary system: acetonitrilemethanol (90∶10 or 5∶95) provided the best separation of β-carotene and its four cis isomers, 9-cis, 13-cis, 15-cis and 13,15-di-cis-β-carotene. The elution order of 9-cis and 13-cis-β-carotene was dependent on the methanol concentration. Methanol-methylene chloride (99∶1) resolved α-carotene and its three cis isomers, 9-cis, 13-cis, and 15-cis-α-carotene. It also proved the best for simultaneous separation of cis isomers of α and β-carotene. Sample solvent can affect the separation efficiency of each isomer. The presence of cis isomers of α and β-carotene in fresh and cooked carrots was also determined.
26 citations
TL;DR: The results show that the oxidative stress induced by menadione in cardiomyocytes results in the depletion of glutathione and protein thiols.
25 citations
TL;DR: In this article, the presence of cholesterol oxidation products (COPS) in heated lard by liquid chromatography was studied and the results indicated that in most cases the COPS content increased along with the increase of heating time.
23 citations
TL;DR: The authors analyzed the use of graphic aids in electronic texts by using four conceptual differences that distinguish printed and electronic texts, including the control of textual presentations, the interaction between readers and texts, the structure of texts, and the variety of symbolic elements that may be integrated with written prose.
Abstract: The authors analyze the use of graphic aids in electronic texts by using four conceptual differences that distinguish printed and electronic texts. The four differences relate to the control of textual presentations, the interaction between readers and texts, the structure of texts, and the variety of symbolic elements that may be integrated with written prose. The authors propose that these four conceptual differences can act as a theoretical framework useful to researchers and instructional designers interested in the use of graphic aids in electronic texts. The authors contend that such a theoretical framework is needed because the current literature related to electronic texts has tended to focus on visual as opposed to more critical conceptual factors. They argue that the key to understanding the effects of graphic aids in electronic texts is found in considering the functional relations between graphical information, written prose, and reading strategies. Examples are provided to illustrate...
18 citations
TL;DR: The results indicate that the proposed beneficial effect of MUFA on cholesterol can be modified when diet contains cholesterol.
Abstract: The purpose of the present study was to investigate the effect of monounsaturated fatty acid (MUFA), in particular oleic acid, under fixed P/S and n-6/n-3 ratios on serum and liver lipid metabolism in rats The male Sprague-Dawley rats aged 28 days were fed diets low in MUFA (LM) or high in MUFA (HM) with or without 1% cholesterol for 4 weeks The experimental diets contained 10% (w/w) fat The body weight gain, food efficiency, and liver weight were comparable among the groups except for an increase in liver weight by dietary cholesterol When cholesterol-added diets were fed, the concentration of serum cholesterol in the HM group was higher than that of the corresponding LM group at second week and at the end of experiment The concentration of serum triacylglycerol in rats fed a cholesterol-enriched HM diet was markedly lower than that of cholesterol-free counterpart Both MUFA and cholesterol tended to increase serum low density lipoprotein-cholesterol concentration, but they had no interaction Serum high density lipoprotein-cholesterol in cholesterol-enriched groups was lower than that in the cholesterol-free counterparts, but it was independent of the MUFA content Dietary cholesterol markedly increased the concentration of liver cholesterol and triacylglycerol and the increase in liver cholesterol was more marked in the HM group than in the LM group, while the level of liver triacylglycerol was comparable The fecal excretion of neutral and acidic steroids increased when 1% cholesterol was added to the diets, irrespective of the MUFA content in the diets Thus, the results indicate that the proposed beneficial effect of MUFA on cholesterol can be modified when diet contains cholesterol
17 citations
TL;DR: This paper shows that order-recursive FIR filters are special forms that occur when no future data values are used to estimate the signal and leads to generalizations of the concepts of prediction-error basis and Cholesky factorization.
Abstract: This paper introduces order-recursive FIR smoothers and shows that order-recursive FIR filters are special forms that occur when no future data values are used to estimate the signal. The formulation leads naturally to generalizations of the concepts of prediction-error basis and Cholesky factorization which are well known in FIR filter design. >
TL;DR: In this article, a simple analytic model of wave-shear interaction was proposed to explain the wave energy dissipation observed in the stratosphere/lower mesosphere, the east-west anisotropy of the wave propagation, and the deceleration of the zonal mean flow, in summer and in winter in the middle mesosphere.
TL;DR: In this article, the photophysics of 3-hydroxy-2-methyl-4-pyridinone (I, II, and III) were investigated and a coupling mechanism between proton motion and N-phenyl torsional motion was proposed.
TL;DR: The algorithm combines the recovery processes of occluding contour, surface and volumetric models in a cooperative and synergetic manner to recover the superquadric primitive from stereo images.
TL;DR: In this article, the dynamic mechanical properties of polyurethane (PU) grafted epoxy polymer networks have been investigated and the glass transition region is successfully broadened on variation of the degree of phase separation.
Journal Article•
TL;DR: Results indicated that either body weight gain or feed efficiency was the lowest in High-Al groups dams, and the higher the maternal aluminum intakes, the lower the average body weight of weanling pups.
Abstract: Microcytic, hypochromic anemia in dialysis patients has been associated with aluminum toxicity. Since pregnant women and infants are high-risk groups for iron-deficiency anemia, the purpose of this study was to investigate if high maternal aluminum intake could cause anemia in dams and pups of rats. Eighteen Sprague-Dawley (SD) female weanling rats were arranged in three groups under randomized completely block design (RCBD) experiment design. Control, Low-Al and High-Al groups had 0, 500, 2000 mg Al/kg diet added in the basal diet, respectively, through growing, pregnancy and lactation. Rats were sacrificed after weanling. Results indicated that either body weight gain or feed efficiency was the lowest in High-Al groups dams (P<0.05). The body weights were the same in neonates from mothers with various aluminum intakes. However, the higher the maternal aluminum intakes, the lower the average body weight of weanling pups (P<0.05). There was a positive correlation between Al intake and serum Al concentration, Al intake and milk Al content of dams (r = 0.93 and r = 0.89, respectively; P<0.05). Average milk and serum aluminum concentrations of dams with high aluminum intake were higher than those in the Control and Low-Al groups. Nevertheless, serum aluminum concentration in pups was not different among the three groups. There was no difference in hematocrit (Hct), hemoglobin (Hb) mean corpuscular hemoglobin concentration (MCHC), total iron binding capacity, or transferrin saturation among dams. On the other hand, the pups in the High-Al group had the highest Hct and Hb per unit body weight compared with the other groups, probably due to smaller litter size.
TL;DR: This article addresses the problem of segmenting objects into parts using stereo images by using both surface and volumetric models to drive the part segmentation process, and the application domain of the approach is broader than that of previous approaches.
Abstract: This article addresses the problem of segmenting objects into parts using stereo images. There are three components in the part segmentation process: surface segmentation, region grouping, and volumetric models (superquadrics) recovery/segmentation. The surface segmentation process segments the image into a set of regions such that each region represents a smooth surface. The region grouping process merges the segmented regions into parts. Finally the process of volumetric models recovery/segmentation recovers the part model and segments that part into smaller parts if necessary. Because we use both surface and volumetric models to drive the part segmentation process, we can capture more geometric properties of the object, and the application domain of our approach is broader than that of previous approaches. The performance of the proposed system is demonstrated with real images and synthetic images. Experimental results show that the system is stable and capable of handling a variety of objects.©1994 John Wiley & Sons Inc
TL;DR: A novel method that uses a statistical approach, including a set of scanning elliptical polarization inputs and the corresponding curve-fitting outputs for a given current, is used to determine the birefringence of the fiber-current-sensing system.
Abstract: The output of a fiber-current sensor with a nonideal input (either misaligned linear or elliptical polarization) and moderate output misalignment in the setup (the fiber end versus the Wollaston prism) has been considered. Based on this, a novel method that uses a statistical approach, including a set of scanning elliptical polarization inputs and the corresponding curve-fitting outputs for a given current, is used to determine the birefringence of the fiber-current-sensing system. The experimentally measured bend-induced birefringence agrees with the estimated value of the bend birefringence.
01 May 1994
TL;DR: The paper develops a time as well as order update recursion for linear least-squares lattice lattice (LSL) interpolation filters and reveals that although interpolation needs more computing power than prediction does, however, interpolation can generate much smaller error power and, thus, reduces much more temporal redundancy than predictiondoes.
Abstract: The paper develops a time as well as order update recursion for linear least-squares lattice (LSL) interpolation filters. The LSL interpolation filter has the nice stage-to-stage modularity which allows its length to be increased or decreased "two-sidedly" (i.e., both past and future) without affecting the already computed parameters. The LSL interpolation filter is also efficient in computation, flexible in implementation and fast in convergence. The computer simulation results shown reveal that although interpolation needs more computing power than prediction does, however, interpolation can generate much smaller error power and, thus, reduces much more temporal redundancy than prediction does. >
TL;DR: The author proposes a fast software implementation technique, in which a 256-entry lookup table containing neighborhood information is built and a dynamic table lookup process is applied to reduce the number of logical matching operations and theNumber of accesses of the neighboring pixels.
Abstract: Morphological image processing is an important tool for a broad range of problems in image processing. A 512-entry table lookup method is used for real-time implementation. But it is not efficient to transfer this method directly into software. The author proposes a fast software implementation technique, in which a 256-entry lookup table containing neighborhood information is built and a dynamic table lookup process is applied to reduce the number of logical matching operations and the number of accesses of the neighboring pixels. In this proposed method only the foreground pixels, which are pixels on the object, are processed. Among the foreground pixels, only at the starting pixel of each "run" of l's is it necessary to read the eight neighboring pixels. For the other pixels, it is necessary to read only three neighbors. This method shows a significant improvement in timesaving. In addition, for systems supporting fast access to consecutive address memory, the author proposes another implementation, which treats the image as a contiguous block of memory. Thus advantage is taken of RAM technology.
19 Apr 1994
TL;DR: The computer simulation results shown in this paper reveal that although interpolation needs more computing power than prediction does, interpolation can generate much smaller error power and thus reduces much more temporal redundancy than predictiondoes.
Abstract: This paper develops a time as well as order update recursion for linear least-squares lattice (LSL) interpolation filters. The LSL interpolation filter has the nice stage-to-stage modularity which allows its length to be increased or decreased "two-sidedly" (i.e., both past and future) without affecting the already computed parameters. The LSL interpolation filter is also efficient in computation, flexible in implementation and fast in convergence. The computer simulation results shown in this paper reveal that although interpolation needs more computing power than prediction does, interpolation can generate much smaller error power and thus reduces much more temporal redundancy than prediction does. >
TL;DR: In this paper, the frequency-dependent vector voltage (Vc) is used to measure the rheological change of a resin due to polymerization, and can be used as the basis of real-time control.
Abstract: Measurement of the frequency-dependent, vector voltage (Vc) provided an in-situ and non-destructive technique to measure continuously the rheological change of a resin due to polymerization, and can be used as the basis of real-time control. The vector voltage depends on the degree of polarization of the dipolar molecules and on the change of viscosity during cure; both result from the modified structure of the epoxy resin during cure, The initial stage of curing, represented by the former portion Of the Vc curve (divided at the minimum of the Vc curve), was caused mainly by the effects of temperature and viscosity. During the latter stage of the cure reaction, Vc alters because of the effect of the lightened matrix structure that inhibits alignment of dipoles. The duration of reaction. temperature of curing and degree of conversion all have the same effects on both vector voltage and viscosity, The minimum value of vector voltage is correlated to the minimum viscosity, and there is a nearly quantitative relationship between them, One can determine the viscosity of the epoxy resin during cure from reading of the vector voltage. Various reaction mechanisms may be explained based on the graphs of vector voltage of various types.
TL;DR: In this paper, an aqueous coprecipitation synthesis process was developed to prepare high quality N-type NdCeCuO superconductors, which were treated at the atomic level.
Abstract: An aqueous coprecipitation synthesis process has been developed to preparing high quality N-type NdCeCuO superconductors. Due to the intimate mixture of coprecipitates was treated at the atomic level; with proper controlling the pH value of the solutions, the superconducting properties of the final homogeneous fine-grain-size NdCeCuO superconductors are much better than that prepared by solid state reaction technique.