Abstract:
A photoacoustic ozone detector includes an acoustic chamber, an ultraviolet light source, and a detector to detect audio signals. The acoustic chamber has an inlet for receiving a gas mixture containing ozone and an outlet for removing the gas mixture from the chamber. The ultraviolet light source generates ultraviolet light having wavelengths shorter than 400 nm, and the ultraviolet light is modulated at a modulation frequency substantially equal to a resonant frequency of the acoustic chamber. The ultraviolet light source is positioned relative to the acoustic chamber so that the ultraviolet light passes through the gas mixture in the acoustic chamber. The detector detects an audio signal in the acoustic chamber having a frequency substantially equal to the modulation frequency of the ultraviolet light. A signal processor generates an output indicative of a concentration of the ozone in the gas mixture based on the detected audio signal.
Abstract:
The present invention provides medicinally active extracts and fractions, and a method for preparing the same by extracting and fractioning constituents from the tissue of plant components of the Anoectochilus family. These active extracts and fractions are useful for preventing or inhibiting tumor growth.
Abstract:
The lipoprotein lipase (LPL) gene is associated with hypertension, elevated plasma triglyceride and metabolic syndrome. A haplotype in the intron 3-intron 4 region (the C/AA/T haplotype), and a haplotype in the intron 5-intron 6 region (the GTAG haplotype), are particularly useful in predicting the risk of an individual for these medical conditions. In addition, other markers that display a linkage disequilibrium with either of these haplotypes can also be used in the same manner. The invention can be applied to Chinese, other Asian populations, Caucasian, African American, and other ethnic groups.
Abstract translation:脂蛋白脂肪酶(LPL)基因与高血压,血浆甘油三酯升高和代谢综合征有关。 内含子3-内含子4区域(C / AA / T单体型)中的单体型,以及内含子5内含子6区域(GTAG单体型)中的单倍型,特别可用于预测个体对这些医学的风险 条件。 此外,也可以以相同的方式使用与这些单元型中的任一种显示连锁不平衡的其它标记。 本发明可适用于中国人,其他亚洲人群,白种人,非裔美国人等民族。
Abstract:
This invention relates to a method of preparing a compound of formula (I): The method includes reacting one or more compounds of formula (II): in the presence of a base and a halogenating agent. In formulas (I) and (II) above, each A, independently, is aryl or heteroaryl; each n, independently, is 0–3; and each R1, independently, is C1–C10 alkyl, C3–C20 cycloalkyl, C3–C20 heterocycloalkyl, aryl, heteroaryl, halo, cyano, nitro, ORa, NRaRb, SiRaRbRc, COORa, OC(O)Ra, C(O)NRaRb, N(Ra)—C(O)Rb, or SO3Ra; wherein each of Ra, Rb, and Rc, independently, is H, C1–C10 alkyl, C3–C20 cycloalkyl, C3–C20 heterocycloalkyl, aryl, or heteroaryl; thereby producing the compound of formula (I) in a one-pot reaction. This invention also relates to the compounds prepared by the method described above.
Abstract:
A novel optical parametric oscillator (OPO) directs pulsed optical energy at a first wavelength towards a nonlinear crystal using a wavelength-selective isolation mirror which substantially reflects incident optical energy at the first wavelength, but is substantially transparent to optical energy at a second wavelength. In response to the pulsed optical energy, the nonlinear crystal generates a beam of optical energy at a second wavelength. The beam of generated optical energy is reinforced using an OPO cavity that is formed by the isolation mirror, a diffraction grating, a highly reflecting mirror, and a tuning mirror. The highly reflecting mirror and the tuning mirror provide high reflectivity at the second wavelength. The tuning mirror, positioned so as to at least partially face the diffraction grating, provides an optional wavelength tuning mechanism when the wavelength of the generated optical energy needs to be changed or adjusted. The diffraction grating reflects at least a portion of the beam of generated optical energy out of the OPO cavity as the zeroth order of the diffraction grating. The pump beam passes once through nonlinear crystal, strikes the diffraction grating at an angle of incidence of approximately 87 to 89.5 degrees, and is reflected out of the OPO cavity along with the generated optical energy. An optical filter deflects the pump beam that is reflected out of the OPO cavity, but is substantially transparent to the beam of generated optical energy. An iris aperture, positioned beyond the optical filter, spatially selects the center portion of the beam of generated optical energy from the OPO cavity. The center portion of the beam has a desired narrow bandwidth for use in any of a variety of system applications, so as to provide a broadly tunable, narrow-bandwidth source of pulsed optical radiation.
Abstract:
A real-time screen recording system is disclosed. Under the design of the real-time screen recording system of this invention, the Event Inspector records updated regions of the screen when a windows update event is generated, the Periodical Extractor records the screen updates periodically. This mechanism ensures that all updates will be recorded. The Event Filter inspects the update events to identify events relating to updates of screen to ensure correct recording of the updated regions. The Sporadic Controller adjusts the working frequency of the Periodical Extractor, so that the Periodical Extractor operates in an efficient manner. The Update Region Filter filters out unnecessary updated regions to avoid heavy workload of the computer system. As a result, an efficient and correct screen recording system may be achieved.
Abstract:
A DTD-compliant XML document editor is disclosed. The XML document editor generates hints for required elements and required element slots automatically in the process of document creation and edition so as to guide the user to produce a valid document, while syntactic violations are avoided at the same time. The editor also suggests optional elements that may be added into the document to be edited. The user requires no knowledge about XML and DTD to edit DTD-compliant XML documents. The editing process is user-interface-neutral, being able to support user interfaces based on tree views, presentation views and forms. By combining the DTD-compliant editing process with the simplicity of forms, a simple XML document editor with forms as its user interface is developed.
Abstract:
A novel method for coding and decoding video data and codec thereof are disclosed. The invented method provides an FGS (fine grained scalability) algorithm using bit plane coding technique. While conducting the bit plane encoding, the spatial and temporal dependence between bit planes is used to exploit the redundancy in the bit planes. In the embodiment of this invention, the bit plains are represented by quadtrees and bit plane prediction is made to remove the spatial and temporal redundancy in a video. The scalability of the video data is fine grained since atoms of the motion residuals do not have to be grouped as coding units.
Abstract:
A novel image protection scheme named nullcocktail watermarkingnull improves over current spread-spectrum watermarking approaches. Two watermarks, which play complementary roles, are simultaneously embedded into an original image. The new watermarking scheme has the characteristic that, no matter what an attack is, at least one watermark typically survives well and can be detected. Results of extensive experiments indicate that our cocktail watermarking scheme is effective in resisting various attacks.
Abstract:
The present invention provides a process of producing highly purified proteases. The invention further provides the use of such purified proteases in treating cardiovascular disorders, including hypertension, stroke and thrombosis.