We suggest that the bulge-to-disc ratios of spiral galaxies are primarily determined by the angular momenta of their host haloes predicted in current hierarchical clustering models for structure formation. Gas with low specific angular momentum becomes self-gravitating and presumably forms stars before it can settle into a rotationally supported disc. We assume this part of the gas in a dark ha...

The positional accuracy of disc storing mechanism for benthic drill is the guarantee of long hole coring in deep sea. Aiming the lack of positional accuracy analysis on disc storing mechanism, the mathematic model of the positional accuracy for disc storing mechanism is presented by using complex vector and matrix analyzing method. The analytical formula of crank rotation positional accuracy is...

Stooped work has been shown to be associated with the development of low back disorders, particularly those that affect the spinal intervertebral discs. Although several studies have been conducted to evaluate the effects of physical factors on disc health, little research has focused on the effect of prolonged stooped work on disc hydration- a critical component of disc health. The purpose of ...

We present a global MHD simulation of a turbulent accretion disc interacting with a giant protoplanet of 5 Jupiter masses in a fixed circular orbit. The disc model had aspect ratio H/r = 0.1, and in the absence of the protoplanet a typical value of the Shakura & Sunyaev (1973) stress parameter α = 5 × 10−3. As expected from previous work the protoplanet was found to open and maintain a signific...

in view of potential biological activities of small molecule polyamides, we synthesized some novel n-(2-aminoethyl)-1-benzyl-2- (alkylthio)-1h-imidazole-5-carboxamide (7a,b), and n-(2-(1-benzyl-2-(alkylthio) -1h-imidazole- 5-carboxamido) ethyl)-1-benzyl-2- (alkylthio)-1h-imidazole-5-carboxamides (8a,b) as antitumor agents. the antitumor activity of compounds 7a,b and 8a,b was studied at concent...

Drosophila imaginal discs, the precursors of the adult fly appendages, have been the subject of intensive developmental studies, particularly on cell determination. Cultured disc fragments are recognized not only for the ability to maintain their determined state through extra cell divisions but also for the ability to transdetermine, or switch to the determined state of a different disc. An un...

Detecting planets in the early stages of formation is key to reconstructing history and diversity fully developed planetary systems. The aim this work identify potential signatures from planet-disc interaction circumstellar discs around MWC 480, HD 163296, AS 209, IM Lup, GM Aur, through study molecular lines observed as part ALMA large program MAPS. Extended localised perturbations velocity, l...

With the gradual deepening of mine excavation depth, strong disturbance deep strata becomes more and obvious. Rock’s failure under blasting mainly depends on its dynamic tensile strength. The changes in rock’s properties are obviously affected by temperature water. In order to study annular sandstone specimens influence water, was drilled, followed water bath tests at eight temperatures (25~95 ...

STUDY DESIGN A new rabbit model was developed that produces disc degeneration through the application of controlled and quantified axial mechanical load. OBJECTIVES To characterize the changes associated with disc degeneration, and to evaluate the feasibility of local transfer of agents to the compressed discs to stimulate disc regeneration. SUMMARY OF BACKGROUND DATA Studies have shown tha...

The location of the optic disc is of critical importance in retinal image analysis. In this work we improve on an approach introduced in [3] who localised an optic disc region through greylevel morphology followed by snake fitting. We propose and implement both the automatic initialisation of the snake and the application of morphology in colour space. We examine various methods of performing t...