Additive Multi-rate Delayed Extended Kalman Filter Attitude Estimation Fusing Gyroscope and Star Tracker Sensors

Let $D$ be an integral domain and $star$ a semistar operation stable and of finite type on it. We define the semistar dimension (inequality) formula and discover their relations with $star$-universally catenarian domains and $star$-stably strong S-domains. As an application, we give new characterizations of $star$-quasi-Pr"{u}fer domains and UM$t$ domains in terms of dimension inequal...

background: anti-angiogenic therapy is a crucial step in cancer treatment. the discovery of new anti-angiogenic compounds from marine organisms has become an attractive concept in anti-cancer therapy. because little data correlated to the pro- and anti-angiogenic efficacies of ophiuroidea, which include brittle star, the current study was designed to explore the anti-angiogenic potential of bri...

Background: Anti-angiogenic therapy is a crucial step in cancer treatment. The discovery of new anti-angiogenic compounds from marine organisms has become an attractive concept in anti-cancer therapy. Because little data correlated to the pro- and anti-angiogenic efficacies of Ophiuroidea, which include brittle star, the current study was designed to explore the anti-angiogenic potential of bri...

– 2 – We present the results of a high resolution UV 2-D spectroscopic survey of star forming galaxies observed with HST–STIS. Our main aim was to map the Lyα profiles to learn about the gas kinematics and its relation with the escape of Lyα photons and to detect extended Lyα emission due to scattering in gaseous halos. We have combined our data with previously obtained UV spectroscopy on other...

A series of novel star-shaped porphyrin-triarylamine conjugates were synthesized by palladium-catalyzed cross-coupling reactions. The spectroscopic and electrochemical studies show that pi-conjugation of the porphyrin core is extended to the triarylamine moieties.

ABSTRACT A high precision star sensor system is presented for accurate attitude determination on the SUNSAT microsatellite. The design constraints were low cost, mass, volume and power. The principle of operation is to image stars and match the observed constellation to a star catalogue. A set of corresponding observed and reference vectors are used to feed an extended Kalman filter for full at...

Evidence is growing for a class of gamma-ray bursts (GRBs) characterized by an initial ∼ 0.1 − 1 s spike of hard radiation followed, after a ∼ 3 − 10 s lull in emission, by a softer period of extended emission lasting ∼ 10 − 100 s. In a few well-studied cases, these “short GRBs with extended emission” show no evidence for a bright associated supernova (SN). We propose that these events are prod...