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An overview of the functions performed by molecular modeling is given. Molecular modeling techniques benefiting from supercomputing are described, namely, conformation, search, deriving bioactive conformations, pharmacophoric pattern searching, receptor mapping, and electrostatic properties. The use of supercomputers f... |
The characteristics of surface acoustic waves (SAW) propagating on a three-layered structure consisting of a perovskite-type ferroelectric film, a buffer layer and a semiconductor substrate have been studied theoretically. Large coupling coefficients (K(2)) can be obtained when the interdigital transducer (IDT) is on t... |
Surface acoustic wave (SAW) devices used in high stability oscillators or filters are generally designed to exhibit a low sensitivity to thermal and mechanical perturbations. Theoretical developments based on variational equations have been proposed to model these phenomena. Mechanical perturbations applied to simple g... |
This paper describes a new type of electronically scanned and focused acoustic imaging device called the cylindrical grating acoustic scanner. With this device, a new transducer called the circular-edge-bonded transducer (CEBT) is devised that is bonded on one end of a cylindrical substrate and can generate a surface a... |
By analyzing the resonance frequency spectrum of a composite resonator consisting of a piezoelectric ceramic film deposited on a substrate plate, the thickness extensional mode electromechanical coupling coefficient of the film, k(t)(2), can be directly calculated from the effective coupling factor values, k(eff )(2), ... |
To construct an eukaryotic expression vector of tumor associated gene tropomyosin 2 (TM2) tagged with green fluorescence protein and study its biological role in tumorigenesis. METHODS; Whole length of TM2 cDNA sequence was amplified from human gastric cancer cell line AGS by reverse transcript PCR. The recombinant TM2... |
The purpose of the present study was to explore the relationship between the expression of S100A4 and E-cad protein and some clinicopathological factors such as histological types, TNM stages, lymph node metastasis and prognosis in non-small cell lung cancer (NSCLC), and analyze whether there is a correlation between t... |
To study the expression of X-linked inhibitor of apoptosis protein (XIAP)-associated factor 1 (Xaf1) in human leukemia HL-60 and K562 cells treated with interferon alpha (INFalpha) and the demethylating agent 5-AZA-CdR, and observe the synergetic antitumor effect of Xaf1 inducer and (-)-epigallocatechin-3-gallate (EGCG... |
To investigate the differential expression of genes encoding multidrug resistance-associated protein 2 (MRP2), MRP3 and MRP5 in human normal liver cell line L-02, hepatocarcinoma cell line BEL and its adriamycin-resistant counterpart BEL/ADM cell line. |
To investigate survivin mRNA and protein expressions in mitomycin (MMC)-treated hepatoma carcinoma Hepa1-6 cells in vitro. |
To observe the changes in the learning and memory functions and the hippocampal expression of phosphorylated cAMP response element-binding protein (pCREB) in rats with status epilepticus and generalized nonconvulsive status epilepticus. |
Reflections from the back surface of a transparent substrate influence the evaluation of optical constants of thin films from ellipsometric measurements. If the thickness of the substrate is large compared with the coherence length of the light, the relative phase between the p and s mode, which commonly is measured by... |
A time domain analysis of an optically controlled digital microstrip switch for microwave integrated circuits on Si substrates is studied. A new model for high-frequency pulse propagation on a microstrip optical switch for different optical parameters is presented. A frequency-dependent macromodel for a microstrip line... |
Titanium oxide thin film, fabricated with tetraisopropyltitanate and oxygen by electron cyclotron resonance-plasma-enhanced chemical vapor deposition, is investigated as a potential candidate for the antireflective layer in KrF excimer laser (248-nm) lithography. The oxygen flow-rate dependence of the optical propertie... |
The relationship of light scatter by a thin film to thin-film morphology is examined. Light scatter by reactively evaporated ZrO(2) thin films is analyzed by using in situ total internal reflection microscopy and angle-resolved scatterometry. Film crystal structure is analyzed by transmission electron microscopy and x-... |
The protein tyrosine phosphatase SHP-1 is a critical regulator of cytokine signaling and inflammation. Mice homozygous for a null allele at the SHP-1 locus have a phenotype of severe inflammation and are hyper-responsive to the TLR4 ligand LPS. TLR4 stimulation in the CNS has been linked to both neuropathic pain and si... |
A typical aspheric singlet used as the objective lens in optical-disk data-storage systems will not work at different wavelengths or with different substrate thicknesses because of spherochromatism. Using two microscope objectives with adjustable collars and a pair of relay lenses, we have constructed a system in which... |
The structure, fabrication, and theory of a three-dimensional planarized optoelectronic clock signal distribution device, based on a thin light-guiding substrate in conjunction with a two-dimensional polymer holographic grating array, are described. We have demonstrated previously a 25-GHz 1-to-42 (6 x 7) highly parall... |
We present a new method for accurate and nondestructive measurement of the refractive indices of substrates and guiding layers in slab waveguides. This method is based on the excitation of leaky waves in substrates and guided waves in guiding layers owing to the etching of grating couplers on the top of structures. It ... |
Thin layers of GaN, a few micrometers thick, grown on sapphire substrate, are the basic structure in the rapidly developing GaN-based blue optoelectronics devices. We are looking for nondestructive, effective, and convenient characterization tools for GaN/sapphire. Ordinary Raman scattering measurements have limited us... |
Sequencing the complete genome of Mycobacterium tuberculosis H37Rv is a major milestone in the genome project and it sheds new light in our fight with tuberculosis. The genome contains around 4000 genes (protein-coding sequences) in the original genome annotation. A subsequent reannotation of the genome has added 80 mo... |
Loop-mediated isothermal amplification (LAMP) of DNA is a novel technique that rapidly amplifies target DNA under isothermal conditions. In the present study, a LAMP test was designed from the serum resistance-associated (SRA) gene of Trypanosoma brucei rhodesiense, the cause of the acute form of African sleeping sickn... |
Between January 5th and January 9th 1998, Quebec was struck by a natural disaster, an ice storm that disrupted the daily lives of millions of people. The ice accumulated on electric wires and installations caused the collapse of part of the system leaving millions of people without power for periods of up to a month. T... |
To study the effects of dexamethasone and histamine on the expression of MUC5AC mRNA and protein in human nasal polyps. |
The Drosophila Groucho (Gro) protein was the founding member of the family of transcriptional co-repressor proteins that now includes the transducin-like enhancer of split (TLE) and Grorelated gene (Grg) proteins in vertebrates. Gro family proteins do not bind DNA directly, but are recruited by a diverse profile of tra... |
We apply the partition algorithm to the problem of time-series classification. We assume that the source that generates the time series belongs to a finite set of candidate sources. Classification is based on the computation of posterior probabilities. Prediction error is used to adaptively update the posterior probabi... |
Artificial neural networks (ANNs) are used to model the interactions that occur between ozone pollution, climatic conditions, and the sensitivity of crops and other plants to ozone. A number of generic methods for analysis and modeling are presented. These methods are applicable to the modeling and analysis of any data... |
We study the nonrandomness of proteome sequences by analysing the correlations that arise between amino acids at a short and medium range, more specifically, between amino acids located 10 or 100 residues apart; respectively. We show that statistical models that consider these two types of correlation are more likely t... |
A novel confocal optical system design and a dual laser confocal scanner have been developed to meet the requirements of highly sensitive detection of biomolecules on microarray chips, which is characterized by a long working distance (wd>3.0 mm), high numerical aperture (NA=0.72), and only 3 materials and 7 lenses use... |
Tattooing is one of a number of DNA delivery methods which results in an efficient expression of an introduced gene in the epidermal and dermal layers of the skin. The tattoo procedure causes many minor mechanical injuries followed by hemorrhage, necrosis, inflammation and regeneration of the skin and thus non-specific... |
We used the electron-beam evaporation method in various oxygen partial pressure environments to deposit TiO(2) thin films on various glass substrates at 300 degrees C. We found the threshold oxygen partial pressures above which the film is transparent are different for films on various substrates. Below the threshold o... |
We present the experimental results of the angular correlation function of far-field speckle patterns scattered by a one-dimensionally random rough surface of a thin dielectric film on a glass substrate when a polarized beam of light is incident upon the rough surface from vacuum. This surface, which separates the vacu... |
Highly polarization-selective diffractive optical elements for use in optical interconnection and routing systems have been fabricated by the wet etching of pairs of calcite substrates and characterized experimentally. We show that when an index-matching polymer is used to fill the gap between the two substrates, subst... |
Using polarized-light microscopy, we have investigated the magnetic domains of perpendicularly magnetized media under several different conditions, including direct observation of the thin-film magnetic layer and observations through the glass or plastic substrates on which the magnetic film was deposited. The results ... |
The II-VI ternary semiconductor alloy system Zn(1-x) Cd(x) Se with 0 < or = x < or = 0.2 has important applications as the active material in blue-green light-emitting diodes and lasers. For the wavelength and temperature ranges over which these devices are designed to operate, a knowledge of the optical properties of ... |
Real-time control by multiwavelength phase-modulated ellipsometry (PME) of the growth of multilayer structures deposited on transparent glass is presented. The structures consist of plasma-deposited SiO(2) and SiN(x) stacks. A model that takes into account incoherent reflection in the substrate is described and tested.... |
A method is developed for determining interface profiles of extreme ultraviolet- (EUV-) layered synthetic microstructures (LSM's). It is based on computer processing digitized LSM electron micrographs. This study was carried out on a tungsten/carbon multilayer. Interfacial roughness has been characterized by means of t... |
The shot noise limitation as well as other factors that influence the sensitivity of measurements with a surface plasmon resonance (SPR) sensor are considered. It is demonstrated that minute changes in the refractive index of a medium close to the surface of a metal film can be detected owing to a shift in the resonanc... |
The reflection grating coupler for direct affinity sensing is characterized in detail. The performance of this device and its potential in affinity sensing application are investigated with two affinity-based systems: A self-assembling protein-multilayer system based on avidin-biotin interaction was used to compare the... |
A kinoform lens and its substrate are usually treated as two distinct components with a common interface. Thick kinoform lenses treat the relief profile and the substrate as an integrated component. An analytical approach for the design of higher-order thick kinoform lenses for stigmatic imaging between extra-axial con... |
Self-assembled InAs quantum dots were prepared on GaAs(100) substrate in a solid source molecular beam epitaxy system. The distribution and topographic images of uncapped dots were studied by atomic force microscope. The statistical result shows that the quantum dots are bimodal distribution. The photoluminescence spec... |
The coupling problem between electrodes due to the propagation of acoustic waves in a periodic metal grating on a piezoelectric substrate is theoretically studied. A method for the determination of the mutual admittance between the grating electrodes is presented, and an analytical expression for the contribution of su... |
A baseband integrated acoustooptic (AO) frequency shifter/modulator module that consists of a pair of titanium-indiffused proton-exchanged (TIPE) waveguide lenses and a pair of cascaded guided-wave AO Bragg cells has been realized in a Y-cut LiNbO(3) waveguide substrate 0.1 cmx1.0 cmx2.0 cm in size. A device module ope... |
A hollow cathode maskless plasma etching method for fabrication of thin quartz membranes is presented. A special geometric arrangement of electrodes and substrates allows the complete plasma structure (plasma sheath, bulk plasma) to be transferred to the substrate area during the etching process. The process has succes... |
The performance of a single-phase unidirectional transducers utilizing the internal reflections of floating electrodes of electrically open and shorted metal strips within an interdigital electrode structure (FEUDT: floating electrode unidirectional transducer) is analyzed using a coupled-mode theory. All four independ... |
An analysis of guided-wave acousto-optic tunable filters (AOTFs) that employ simple acousto-optic (AO) weighted coupling techniques for sidelobe reduction and the calculated and experimental results from a specific example that involves only variation of the width of a surface acoustic wave (SAW) slot waveguide are pre... |
A prototype 16-element needle hydrophone array has been designed, fabricated and characterized. The primary use of this array is to provide acoustic feedback during ultrasound hyperthermia treatments. This feedback can be used to compensate for patient motion and tissue inhomogeneities by controlling the phased array d... |
An easy-to-implement, accurate, and fast method to calculate 2-D quasi-static capacitance and inductance of electrodes in SAW devices is presented. The method is outlined by considering electrodes with any cross-section geometries in dielectric environment, consisting of two anisotropic materials with a plane interface... |
The temperature coefficient of delay of the SH-type surface acoustic wave on 36 degrees Y-X LiTaO(3) substrates with a ferroelectric inversion layer is theoretically analyzed and it is shown that the temperature characteristics can be improved by an electric-field short-circuiting effect of the domain boundary. The exp... |
I consider the influence of different substrate thicknesses on the signal obtained from an optical disk. Two solutions are presented for the reading of different disk types. In one situation a substrate thickness change for disks with equal density is made inoffensive by introduction of a combined amplitude-phase mask ... |
We characterized a laminar grating with a Mo/Si multilayer coating by using synchrotron radiation and atomic force microscopy. The grating substrate had 2400 grooves/mm, 40-A groove depth, and 2080-A groove width. The microroughness of the grating substrate was 5 A rms. The multilayer coating was optimized to have peak... |
We propose and test experimentally a new scheme to implement spatially multiplexed multiwavelength holographic memory. An electro-optically modulated phase grating array on LiNbO(3) substrate is used as a guided-wave interconnect to activate the reconfigurable reference beam. The object beam is provided by free-space i... |
An expression is given for the aberration imparted by a tilted plane-parallel plate to a converging or diverging pencil of rays. Analytical expressions for the wave-front aberration coefficients up to the sixth order are derived. These expressions, among others, are of importance when reading an optical disk through it... |
We describe the design and construction of a high-precision laser writing machine for the direct generation of large-diameter rotationally symmetric diffractive optics with continuous profiles in photoresist. The photoresist profile can be used as a replication master surface or etched into a silica substrate. Machine ... |
A dynamic testbed for the evaluation of optical disks has been designed and constructed. The system is achromatic within the wavelength range 440-690 nm, allowing any light source in this range to be utilized for read-write-erase experiments. In addition, the system accepts disks with substrate thicknesses ranging from... |
The neuronal glycine transporter GLYT2 is a plasma membrane protein that removes the neurotransmitter glycine from the synaptic cleft, thereby aiding the pre-synaptic terminal reloading and the termination of the glycinergic signal. Missense mutations in the gene encoding GLYT2 (SLC6A5) cause hyperekplexia in humans. T... |
Bovine herpesvirus 4 (BoHV-4) is a gamma-herpesvirus with no clear disease association. A recombinant BoHV-4 (BoHV-4EGFP Delta TK) expressing Green Fluorescent Protein (EGFP), was successfully used to infect F98 rat glioma cells. BoHV-4EGFP Delta TK was injected into the lateral ventricle of the rat brain. Histology an... |
The use of a surface-acoustic-wave (SAW) device to measure the rate of gas flow is described. A SAW oscillator heated to a suitable temperature above ambient is placed in the path of a flowing gas. Convective cooling caused by the gas flow results in a change in the oscillator frequency. A 73-MHz oscillator fabricated ... |
The application of ferroelectric films to semiconductor memories is discussed. Design and testing considerations are examined. A nonvolatile memory using the polarization hysteresis of ferroelectrics is described. Test results for PZT films on GaAs substrate are presented. The data show that nonvolatile memories are fe... |
Amorphous and nanocrystalline TiO(2) thin films coated on a vitreous silica substrate by a solgel dip coating method are investigated for optical properties by spectroscopic ellipsometry (SE) together with transmission spectroscopy. A method of analysis of SE data to determine the degree of inhomogeneity of TiO(2) film... |
Ellipsometric studies are generally carried out in the reflection mode rather than in the transmission mode, requiring invariably opaque substrates or substrates in which the backreflection is minimized or suppressed by different methods. In the present research we used a transmission and reflection photoellipsometry m... |
For a variety of UV optical coatings, surface roughness was measured by use of an atomic-force microscope (AFM) to study its dependence on the film material and thickness, coating design, and deposition process. After analyzing the corresponding power spectral density functions, we propose a simple classification model... |
Acrylate-based optical waveguides have been fabricated with optical loss of 0.5 dB/cm at 1300 nm by means of a new material system that ensures stable optical and mechanical properties over a wide temperature range. No increase in loss was measured after 500 h at temperatures up to 150 degrees C, and there was no signi... |
To evaluate the therapeutic effect of bone morphogenetic protein 2 (BMP-2) gene modified tissue engineering bone (GMB) combined with vascularized periosteum in the reconstruction of segmental bone defect. |
Enzymes are often used in organic solvents for catalyzing organic synthesis. Two enzyme preparations, EPRP (enzyme precipitated and rinsed with n-propanol) and PCMC (protein coated microcrystals) show much higher activities than lyophilized powders in such systems. Both preparations involve precipitation by an organic ... |
Intravenous infusions of glucose and amino acids increase both nitrogen balance and muscle accretion. We hypothesised that co-infusion of glucose (to stimulate insulin) and essential amino acids (EAA) would act additively to improve nitrogen balance by decreasing muscle protein degradation in association with alteratio... |
The glycosylphosphatidylinositol (GPI) moiety is one of the ways by which many cell surface proteins, such as Gal/GalNAc lectin and proteophosphoglycans (PPGs) attach to the surface of Entamoeba histolytica, the agent of human amoebiasis. It is believed that these GPI-anchored molecules are involved in parasite adhesio... |
Electrophysiologic testing and radiofrequency ablation have evolved as curative measures for a variety of rhythm disturbances. As experience in this field has grown, ablation is progressively being used to address more complex rhythm disturbances. Paralleling this trend are technological advancements to facilitate thes... |
Value-added processing with respect to rice milling has traditionally treated the rice bran layer as a homogenous material that contains significant concentrations of high-value components of interest for pharmaceutical and nutraceutical applications. Investigators have shown that high-value components in the rice bran... |
Ventilator-associated pneumonia (VAP) is a leading cause of morbidity and mortality in critically ill patients. The Institute for Healthcare Improvement 100,000 Lives Campaign made VAP a target of prevention and performance improvement. Additionally, the Joint Commission on Accreditation of Health Organizations' 2007 D... |
Efficient functioning of enzymes inside liposomes would open new avenues for applications in biocatalysis and bioanalytical tools. In this study, the entrapment of amyloglucosidase (AMG) (EC 3.2.1.3) from Aspergillus niger into dipalmitoylphosphatidylcholine (DPPC) multilamellar vesicles (MLVs) and large unilamellar ve... |
To investigate changes of 5-hydroxytryptamine (5-HT) and its synthesis rate-limiting enzyme tryptophan hydroxylase (TPH) in the ventral horn of spinal cord after exercise-induced fatigue, and to further discuss the mechanism of exercise-induced central fatigue at spinal level. |
We demonstrate that solarization occurs in glass substrates during thin-film deposition and that it induces high absorption near the surface of the substrate. Solarization has been observed especially in ion-plating deposition. We show that the solarization of the substrate is caused by electromagnetic radiation emitte... |
A novel compact multichannel integrated optical sensor module isdescribed. Its performance is demonstrated by measurement of the mass adsorption of an analyte molecule to the transducer surface by refractometry in an immunosensor experiment. The signal transduction is achieved by means of chirped grating couplers, whic... |
We present an experimental study of a composite voltage-biased superconducting bolometer (VSB). The tested VSB consists of a Ti-film superconducting thermometer (T(c) ~375 mK) on a Si substrate suspended by NbTi superconducting leads. A resistor attached to the substrate provides calibrated heat input into the bolomete... |
Microsatellites are short tandem repeats of one to six bases in genomic DNA. As microsatellites are highly polymorphic and play a vital role in gene function and recombination, they are an attractive subject for research in evolution and in the genetics and breeding of animals and plants. Orphan genes have no known hom... |
A method of fluorescent nanoparticle-based indirect immunofluorescence microscopy (FNP-IIFM) was developed for the rapid detection of Mycobacterium tuberculosis. An anti-Mycobacterium tuberculosis antibody was used as primary antibody to recognize Mycobacterium tuberculosis, and then an antibody binding protein (Protei... |
The 173-195 segment corresponding to the helix 2 of the C-globular prion protein domain could be one of several "spots" of intrinsic conformational flexibility. In fact, it possesses chameleon conformational behaviour and gathers several disease-associated point mutations. We have performed spectroscopic studies on the... |
Two-dimensional gel-electrophoresis (2-DE) images show the expression levels of several hundreds of proteins where each protein is represented as a blob-shaped spot of grey level values. The spot detection, that is, the segmentation process has to be efficient as it is the first step in the gel processing. Such extract... |
The purpose of this study was to determine the effects of PCBs and PBBs on peroxisome proliferator-activated receptor-alpha-(PPARalpha-) associated enzyme activities or protein levels. Male Sprague-Dawley rats were administered a single IP injection (150 mu mol/kg) of either 3,3',4,4'-tetrabromobiphenyl, 3,3',4,4'-tetr... |
Protein farnesylation is required for the activation of multiple proteins involved in cell differentiation and function. In white adipose tissue protein, farnesylation has shown to be essential for the successful differentiation of preadipocytes into adipocytes. We hypothesize that protein farnesylation is required for... |
The broad ligand-binding characteristic of PPARbeta/delta has long hampered identification of physiologically-meaningful ligands for the receptor. The observations that the activity of PPARbeta/delta is supported by fatty acid binding protein 5 (FABP5), which directly delivers ligands from the cytosol to the receptor, ... |
Several natural language processing tools, both commercial and freely available, are used to extract protein interactions from publications. Methods used by these tools include pattern matching to dynamic programming with individual recall and precision rates. A methodical survey of these tools, keeping in mind the min... |
We investigate methods of estimating residue correlation within protein sequences. We begin by using mutual information (MI) of adjacent residues, and improve our methodology by defining the mutual information vector (MIV) to estimate long range correlations between nonadjacent residues. We also consider correlation ba... |
To construct recombinant eukaryotic expression plasmid pIRES-rhBMP2-EGFP containing enhanced green fluorescence protein (EGFP) and recombinant human bone morphogenetic protein-2 (rhBMP-2). |
To study the expression of Src-suppressed C kinase substrate (SSeCKS) mRNA in pulmonary microvascular endothelial cells(PMVEC) induced by lipopolysaccharide, and the interfering effect of methylprednisolone sodium succinate. |
To investigate the effects of chronic ethanol ingestion and lipopolysaccharide (LPS) on airway epithelium barrier function and the expression of tight junction protein occludin and adherens junction protein E-cadherin. |
Idiotypic determinant (Id) of malignant B lymphocyte surface membrane immunoglobulin (SmIg) is not only a specific marker for chronic B-cell lymphatic leukemia (B-CLL) but also a specific antigen as an attractive target for active immunotherapy. However, as a small self antigen, it has poor immunogenicity. As an import... |
DNA-dependent protein kinase (DNA-PK) can repair DNA double-strand break. This study was to observe the effect of DNA-PKcs antisense oligodeoxynucleotides (ASODN) on the radiosensitivity of nasopharyngeal carcinoma (NPC) cell lines with normal or abnormal p53 functions. |
Ezrin, a cytoskeleton-related protein, contributes to the invasion and metastasis of tumors; our previous study had also shown that Epstein-Barr virus latent membrane protein 1 (EBV-LMP1) can promote the metastasis of nasopharyngeal carcinoma (NPC) cells. This study was to investigate whether EBV-LMP1 could change the ... |
Chlorotyrosine is an oxidative product of hypochlorous acid and l-tyrosine, and is considered as a biomarker for oxidative stress and cardiovascular disease. However, it is not clear whether chlorotyrosine could directly contribute to vascular pathogenesis. In this study, we investigated the effect and potential mechan... |
Kawasaki disease (KD) is an acute febrile, multi-system endangeitis, which is mainly found in early childhood. Its etiology is still unknown. A great deal of clinical evidence and epidemiologic data suggest that KD is correlated with an acute immune dysfunction caused by infection. Many evidences in the past suggested ... |
Altered aquaporin-4 (AQP4) expression has been reported in brain edema, tumors, muscular dystrophy, and neuromyelitis optica. However, the plasma membrane organization of AQP4 and its interaction with proteins such as the dystrophin-associated protein complex are not well understood. In this study, we used sucrose dens... |
Trimethyltin (TMT) intoxication is considered a suitable experimental model to study the molecular basis of selective hippocampal neurodegeneration as that occurring in several neurodegenerative diseases. We have previously shown that rat hippocampal neurons expressing the Ca(2+)-binding protein calretinin (CR) are spa... |
The microtubule-associated protein tau is abnormally hyperphosphorylated in the brains of individuals with Alzheimer disease and other tauopathies, and is believed to play a critical role in the pathogenesis of these diseases. While the mechanisms leading to abnormal tau phosphorylation remain elusive, the recent demon... |
A detailed theoretical analysis for planar bulk-acoustic-wave (BAW) devices that results in a method for computing the bulk-acoustic-wave response for any orientation of any piezoelectric substrate is presented. The BAW responses for four devices is computed and are found to be in excellent agreement with published exp... |
A numerical approach that combines the finite-element method (FEM) and the analytical method is discussed. To treat a large periodic structure in which a repetition of complicated components arises, the substructure method is introduced. As a result, the mutual interaction between surface waves and bulk waves is automa... |
A practical technique for solution concentration measurement, based on a resonator with enclosed piezoceramics, which can operate at a resonant frequency mode around 500 kHz is designed and evaluated. The resonance can be tracked automatically by means of a phase-locked loop. Measurements made on water-methanol mixture... |
For pt.I see ibid., vol.UFFC-36, p.565-73 (1989). A characteristic feature of a slanted chirp transducer (SCT) with fingers only a few wavelengths long is that waves launched from it tend to a focus. Analytical expressions for key features of the radiation field are obtained for a linear chirp SCT on an anisotropic sub... |
Lead titanate thin films were deposited on titanium substrates by a chemical vapor deposition (CVD) process involving the application of vapor mixtures of Pb, ethyl titanate (Ti(C(2)H(5)O) (4)), and oxygen. Auger electron spectroscopy (AES) analyses were performed to determine the chemical composition of lead titanate ... |
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