PURPOSE The aims of this randomized-controlled clinical trial were to compare marginal and internal adaptation of all-ceramic crowns fabricated with CAD/CAM and heat-pressed (HP) techniques before luting and to evaluate the clinical outcomes at baseline and at 6, 12, and 24 months after luting. MATERIALS AND METHODS Fifteen CAD/CAM (CC) and 15 HP all-ceramic crowns were placed in 15 patients....

We study the impact of international trade on a firm’s technology choice in an infinite-horizon model. Banks engage oligopolistic competition providing capital for manufacturing sector. Manufacturing firms also and choose technologies with different levels fixed marginal costs. In steady state, country larger market size or more efficient financial sector advanced technologies, this has higher ...

Bundle sheath extensions (BSEs) are key features of leaf structure with currently little-understood functions. To test the hypothesis that BSEs reduce the hydraulic resistance from the bundle sheath to the epidermis (r(be)) and thereby accelerate hydropassive stomatal movements, we compared stomatal responses with reduced humidity and leaf excision among 20 species with heterobaric or homobaric...

Plant growth and development directly depend on several physical variables, such as light, temperature or humidity and also indirectly through the action of pests (pathogens, insects) or pollutants. This dependency results from biological processes such as photosynthesis, mineral root absorption, stomatal opening, or disease development, responding to these physical variables. These responses a...

Interferometry in the optical and near infrared has so far played a marginal role in Extragalactic Astronomy. Active Galactic Nuclei are the brightest and most compact extragalactic sources, nonetheless only a very limited number could be studied with speckle interferometry and none with long baseline interferometry. The VLTI will allow the study of moderately faint extragalactic objects with v...

When mannose is provided in the transpiration stream to spinach (Spinacia oleracea) leaf discs, a series of specific and nonspecific changes occur in CO(2) and H(2)O vapor exchange as a function of feeding time. The initial increases in apparent photosynthesis and transpiration are nonspecific effects due to osmotic changes leading to passive stomatal opening. The mannose-specific effects are: ...

A study of a class of openings and closings is investigated using reconstruction criteria. The main goal in studying these transformations consists of eliminating some inconveniences of the morphological opening (closing) and the opening (closing) by reconstruction. The idea in building these new openings and closings comes from the notions of filters by reconstruction and levelings. In particu...

Stepwise increases in fluorescent illuminance, imposed as a single variable in a controlled environment, induced progressive stomatal opening in 8 plant species, as evidenced by a consistent decrease in leaf diffusion resistance (R(L)), ranging from 15 to 70 sec cm(-1) in darkness to about 1 sec cm(-1) at approximately 40 kilolux. The minimum R(L) values were the same for the upper and the lowe...

Add an opening stage of signal acquisition to a canonical portfolio choice model and let investors have rational expectations about the ensuing Walrasian equilibrium. The expected marginal utility of a signal (its action value) falls in the number of signals and turns strictly negative at a finite number because signals diminish the asset’s excess return. There is a natural transparency limit a...