15,664 research outputs found

    The Marketing Of Agriculture Products In Harris County, Texas

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    The origin of marketing is lost in obscurity. Even among the traces of primitive man ornaments and weapons have been found which were apparently far removed from the points where they were produced. Certainly, there are sufficient evidences of the existence of marketing or trade among the ancient Egyptians. Even as late as the year of 1000, villages were characterized by their agricultural independent character, and by economic self-sufficiency. In every village, attempt was made, by crude and wasteful methods to raise the necessary food supply and to produce the few other necessities of existence. The purpose of this study is to arouse further interest and research in this particular phase of agricultural progress. It is hoped that this study will bring out the possibilities in Marketing and what improvements can be made in the future. In its commonly accepted usage, the term marketing covers all business activities necessary to effect transfers in the ownership of goods and to provide for their physical distribution. It embraces the entire group of services and functions performed in the distribution of merchandise from producer to consumer, excluding only operations involving changes in form. The various methods by which these services are rendered, together with the institutions involved and the policies adopted in the performance of such functions, are necessarily an integral part of marketing

    Input-output characterization of fiber reinforced composites by P waves

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    Input-output characterization of fiber composites is studied theoretically by tracing P waves in the media. A new path motion to aid in the tracing of P and the reflection generated SV wave paths in the continuum plate is developed. A theoretical output voltage from the receiving transducer is calculated for a tone burst. The study enhances the quantitative and qualitative understanding of the nondestructive evaluation of fiber composites which can be modeled as transversely isotropic media

    Input-output characterization of fiber composites by SH waves

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    Input-output characterization of fiber composites is studied theoretically by tracing SH waves in the media. A fiberglass epoxy composite is modeled as a homogeneous transversely isotropic continuum plate. The reflection of an SH wave at a stress-free plane boundary in a semi-infinite transversely isotropic medium is considered first. It is found that an incident SH wave reflects only a similar SH wave back into the medium. It is also established that the angle of reflection of the reflected wave is equal to the angle of incidence of the incident wave. The phase velocity of the SH waves and the delay time of the SH waves in reaching the receiving transducer are computed as functions of a reflection index, defined as the number of reflections of the SH waves from the bottom face of the continuum plate. The directivity function corresponding to the shear stress associated with the SH waves in the continuum plate is also derived as a function of the reflection index. A theoretical output voltage from the receiving transducer is calculated for a tone burst (a periodic input voltage of finite duration). The output voltage is shown for tone bursts of duration 60 microseconds and center frequencies of 0.75, 1.00, and 1.25 MHz. The study enhances the quantitative and qualitative understanding of the nondestructive evaluation (NDE) of fiber composites which can be modeled as transversely isotropic media

    Temporal-adaptive Euler/Navier-Stokes algorithm for unsteady aerodynamic analysis of airfoils using unstructured dynamic meshes

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    A temporal adaptive algorithm for the time-integration of the two-dimensional Euler or Navier-Stokes equations is presented. The flow solver involves an upwind flux-split spatial discretization for the convective terms and central differencing for the shear-stress and heat flux terms on an unstructured mesh of triangles. The temporal adaptive algorithm is a time-accurate integration procedure which allows flows with high spatial and temporal gradients to be computed efficiently by advancing each grid cell near its maximum allowable time step. Results indicate that an appreciable computational savings can be achieved for both inviscid and viscous unsteady airfoil problems using unstructured meshes without degrading spatial or temporal accuracy

    The Paton-Williams Debate on Universal Salvation and the Destiny of the Wicked

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    https://digitalcommons.acu.edu/crs_books/1540/thumbnail.jp

    Exogenous heat shock proteins HSPA1A and HSPB1 regulate TNF ‐α, IL ‐1ÎČ and IL ‐10 secretion from monocytic cells

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    This is the peer reviewed version of the following article: Ogbodo, E., Michelangeli, F., & Williams, J. H. H. (2023). Exogenous heat shock proteins HSPA1A and HSPB1 regulate TNF‐α, IL‐1ÎČ and IL‐10 secretion from monocytic cells. FEBS Open Bio. 13(10), 1922-1940, which has been published in final form at https://doi.org/10.1002/2211-5463.13695. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.History: received 2023-04-17, accepted 2023-08-02, epub 2023-08-15, issued 2023-08-15, published 2023-08-15Endogenous molecules, such as heat shock proteins (HSP), can function as danger signals when released into the extracellular environment in response to cell stress, where they elicit an immune response such as cytokine secretion. There has also been some suggestion that contamination of exogenous HSPs with lipopolysaccharide (LPS) may be responsible for these effects. This study investigates the effects of exogenous HSPA1A and HSPB1 on the activation of immune cells and the resulting secretion of cytokines, which are involved in inflammatory responses. To address whether exogenous HSPs can directly activate cytokine secretion, naĂŻve U937 cells, differentiated U937 cells, and peripheral blood mononuclear cells (PBMCs) were treated with either exogenously applied HSPA1A or HSPB1, and then secreted IL‐1ÎČ, TNF‐α, and IL‐10 were measured by ELISA. Both HSPs were able to induce a dose‐dependent increase in IL‐10 secretion from naĂŻve U937 cells and dose‐dependent IL‐1ÎČ, TNF‐α and IL‐10 secretion were also observed in differentiated U937 cells and PBMCs. We also observed that CD14 affects the secretion levels of IL‐1ÎČ, TNF‐α, and IL‐10 from cells in response to exogenous HSP treatment. In addition, HSPA1A and HSPB1 were shown to interact with CD14, CD36, and CD11b extracellular receptor proteins. Several approaches used in this study indicate that HSP‐induced cytokine secretion is largely independent of any contaminating LPS in the samples

    W49A North - Global or Local or No Collapse?

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    We attempt to fit observations with 5" resolution of the J=2-1 transition of CS in the directions of H II regions A, B, and G of W49A North as well as observations with 20" resolution of the J=2-1, 3-2, 5-4, and 7-6 transitions in the directions of H II regions A and G by using radiative transfer calculations. These calculations predict the intensity profiles resulting from several spherical clouds along the line of sight. We consider three models: global collapse of a very large (5 pc radius) cloud, localized collapse from smaller (1 pc) clouds around individual H II regions, and multiple, static clouds. For all three models we can find combinations of parameters that reproduce the CS profiles reasonably well provided that the component clouds have a core-envelope structure with a temperature gradient. Cores with high temperature and high molecular hydrogen density are needed to match the higher transitions (e.g. J=7-6) observed towards A and G. The lower temperature, low density gas needed to create the inverse P-Cygni profile seen in the CS J=2-1 line (with 5" beam) towards H II region G arises from different components in the 3 models. The infalling envelope of cloud G plus cloud B creates the absorption in global collapse, cloud B is responsible in local collapse, and a separate cloud, G', is needed in the case of many static clouds. The exact nature of the velocity field in the envelopes for the case of local collapse is not important as long as it is in the range of 1 to 5 km/s for a turbulent velocity of about 6 km/s. High resolution observations of the J=1-0 and 5-4 transitions of CS and C34S may distinguish between these three models. Modeling existing observations of HCO+ and C18O does not allow one to distinguish between the three models but does indicate the existence of a bipolar outflow.Comment: 42 pages, 27 figures, accepted for publication in the ApJS August 2004, v153 issu

    Cloud atlas for the FIRE Cirrus Intensive Field Observation (IFO)

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    An Intensive Field Observation (IFO) of cirrus clouds was conducted over the mid-western U.S. during the period October 13 to November 2, 1986. This activity, part of the First ISCCP Regional Experiment (FIRE), included measurements made from specially deployed instruments on the ground, balloons, and aircraft as well as observations from existing operational and experimental satellites. One of the sets of satellite observations was the radiance measurements made with the 5-channel AVHRR radiometer on the NOAA 9 polar orbiting meteorological satellite. The ground resolution of the measurements at nadir is approx. 1 km. It is these measurements, made once each day at approximately 2:30 p.m. local time, that were used in determining the present cloud atlas. The area covered by the atlas is slightly larger than the area specified for the IFO, in order to be in alignment with the grid that will be used in a forthcoming atlas for the larger, ETO region. The atlas contains four pages of information for each satellite pass. The 1st page of each group shows the distribution of measured radiances in channel 1 (normalized to the incoming solar flux multiplied by the cosine of the solar zenith angle) and in channel 4 for the area as a whole and for each analysis box. The 2nd page shows the images in: channels 1 and 2, channel 3R; and channel 4. The 3rd page shows the retrieved parameters in graphical form for the region as a whole and for each analysis box, where cloud fraction appears as a contour plot with respect to optical thickness and cloudtop temperature. The 4th page provides a statistical summary of the retrieved parameters in numerical form for each analysis box
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