Insufficient cardiac preload and impaired contractility are frequent in early sepsis. We explored the effects of acute cardiac preload reduction and dobutamine on hepatic arterial (Qha) and portal venous (Qpv) blood flows during endotoxin infusion. We hypothesized that the hepatic arterial buffer response (HABR) is absent during preload reduction and reduced by dobutamine. In anesthetized pigs,...

Abstract For a few years now, GNSS multi-frequency quadrifilar helix antennas (QHA) are available to be used for precise applications. We performed test measurements with two types of QHA and compared them geodetic patch antenna. Although code carrier phase noise high-frequent multipath was determined larger as the antenna, fast-static horizontal coordinate accuracies on same level demonstrate ...

We present a theory and calculation scheme of structural optimization at finite temperatures within the quasiharmonic approximation (QHA). The is based on an efficient updating interatomic force constants with change crystal structures, which we call IFC renormalization. cell shape atomic coordinates are treated equally simultaneously optimized. apply to thermal expansion pyroelectricity wurtzi...

امروزه به­ دلیل شتاب روزافزون روند جهانی‌سازی در سراسر دنیا زنجیره تأمین ابعاد جدید به خود گرفته و بسیار پیچیده‌تر از قبل شده است. هوشمند باید طریق فناوری‌های مختلف به­خصوص اینترنت بتواند امکان تبادل اطلاعات سریع کل زنجیره‌ را فراهم کند. پژوهش حاضر یک مطالعه کیفی به­منظور ارائه مدل برای خدمات صندوق کارآفرینی امید صورت این روش داده‌بنیاد اشتراوس کوربین (1998)، استفاده تا اشباع نظری مصاحبه‌شوندگا...

Thermal expansion behavior of two-dimensional (2D) nitrides and graphene were studied by ab initio molecular dynamics (MD) simulations as well quasiharmonic approximation (QHA). Anharmonicity the acoustic phonon modes are related to unusual negative thermal (NTE) nitrides. Our results also hint that direct MD a more elaborate method investigate 2D materials than QHA. Nevertheless, giant NTE coe...

Conformational entropy calculation, usually computed by normal-mode analysis (NMA) or quasi harmonic analysis (QHA), is extremely time-consuming. Here, instead of NMA or QHA, a solvent accessible surface area (SASA) based model was employed to compute the conformational entropy, and a new fast GPU-based method called MURCIA (Molecular Unburied Rapid Calculation of Individual Areas) was implemen...