UTC Aerospace Systems

About: UTC Aerospace Systems is a based out in . It is known for research contribution in the topics: Factory (object-oriented programming) & Avionics. The organization has 248 authors who have published 416 publications receiving 3733 citations. The organization is also known as: UTAS.

Risk Management Principles and Guidelines

Abstract: This article examines ISO 31000-2009, also referred to as ANSI/ASSE Z690.2, the second of a trio of standards dealing with the concept of Risk. In our first review (Luko 2013) risk management terminology was reviewed. The terminology documents, ISO Guide 73 and ANSI/ASSE Z690.1-2011, were found to be identical and contained all of the risk vocabulary used in the subsequent two standards. In the present review, the second of the trio of standards concerning risk is treated. The general topic of this standard is risk management principles and guidelines.

Mineralogy of a Mudstone at Yellowknife Bay, Gale Crater, Mars

Abstract: Sedimentary rocks at Yellowknife Bay (Gale crater) on Mars include mudstone sampled by the Curiosity rover. The samples, John Klein and Cumberland, contain detrital basaltic minerals, calcium sulfates, iron oxide or hydroxides, iron sulfides, amorphous material, and trioctahedral smectites. The John Klein smectite has basal spacing of similar to 10 angstroms, indicating little interlayer hydration. The Cumberland smectite has basal spacing at both similar to 13.2 and similar to 10 angstroms. The larger spacing suggests a partially chloritized interlayer or interlayer magnesium or calcium facilitating H2O retention. Basaltic minerals in the mudstone are similar to those in nearby eolian deposits. However, the mudstone has far less Fe-forsterite, possibly lost with formation of smectite plus magnetite. Late Noachian/Early Hesperian or younger age indicates that clay mineral formation on Mars extended beyond Noachian time.

Passive origins of stomatal control in vascular plants

Abstract: Carbon and water flow between plants and the atmosphere is regulated by the opening and closing of minute stomatal pores in surfaces of leaves. By changing the aperture of stomata, plants regulate water loss and photosynthetic carbon gain in response to many environmental stimuli, but stomatal movements cannot yet be reliably predicted. We found that the complexity that characterizes stomatal control in seed plants is absent in early-diverging vascular plant lineages. Lycophyte and fern stomata are shown to lack key responses to abscisic acid and epidermal cell turgor, making their behavior highly predictable. These results indicate that a fundamental transition from passive to active metabolic control of plant water balance occurred after the divergence of ferns about 360 million years ago.

Voluntary Disclosure of Corporate Governance Practices by Listed Australian Companies

Abstract: This study examines the relationship between the voluntary disclosure of information about corporate governance practices and the intention to raise external finance. This relationship is examined by using corporate governance disclosures in the annual reports of Australian companies in 1994. Data from this year are used because in subsequent years Australian Stock Exchange regulations influenced listed companies to make disclosures about their corporate governance practices. Regression analysis indicates that the voluntary disclosure of corporate governance information is positively associated with the intention to raise equity capital, but not with the intention to raise debt capital.

Quaternion Fourier Transforms for Signal and Image Processing

Abstract: Based on updates to signal and image processing technology made in the last two decades, this text examines the most recent research results pertaining to Quaternion Fourier Transforms. QFT is a central component of processing color images and complex valued signals. The books attention to mathematical concepts, imaging applications, and Matlab compatibility render it an irreplaceable resource for students, scientists, researchers, and engineers.