Effects of aircraft noise on flight and ground structures

Acoustic loads measured on jet-powered STOL configurations are presented for externally blown and upper surface blown flap models ranging in size from a small laboratory model up to a full-scale aircraft model. The implications of the measured loads for potential acoustic fatigue and cabin noise are discussed. Noise transmission characteristics of light aircraft structures are presented. The relative importance of noise transmission paths, such as fuselage sidewall and primary structure, is estimated. Acceleration responses of a historic building and a residential home are presented for flyover noise from subsonic and supersonic aircraft. Possible effects on occupant comfort are assessed. The results from these three examples show that aircraft noise can induce structural responses that are large enough to require consideration in the design or operation of the aircraft

Cleavage of DFNA5 by caspase-3 during apoptosis mediates progression to secondary necrotic/pyroptotic cell death.

Apoptosis is a genetically regulated cell suicide programme mediated by activation of the effector caspases 3, 6 and 7. If apoptotic cells are not scavenged, they progress to a lytic and inflammatory phase called secondary necrosis. The mechanism by which this occurs is unknown. Here we show that caspase-3 cleaves the GSDMD-related protein DFNA5 after Asp270 to generate a necrotic DFNA5-N fragment that targets the plasma membrane to induce secondary necrosis/pyroptosis. Cells that express DFNA5 progress to secondary necrosis, when stimulated with apoptotic triggers such as etoposide or vesicular stomatitis virus infection, but disassemble into small apoptotic bodies when DFNA5 is deleted. Our findings identify DFNA5 as a central molecule that regulates apoptotic cell disassembly and progression to secondary necrosis, and provide a molecular mechanism for secondary necrosis. Because DFNA5-induced secondary necrosis and GSDMD-induced pyroptosis are dependent on caspase activation, we propose that they are forms of programmed necrosis

Memory in Autistic Spectrum Disorder

Behavioral evidence concerning memory in high-functioning forms of autism (HFA) and in moderately low-functioning autism (M-LFA) is reviewed and compared. Findings on M-LFA are sparse. However, it is provisionally concluded that memory profiles in HFA and M-LFA (relative to ability-matched controls) are similar, but that declarative memory impairments are more extensive in M-LFA than in HFA. Specifically, both groups have diminished memory for emotion- or person-related stimuli. Regarding memory for non-social stimuli, both groups probably have mental-age appropriate nondeclarative memory; and within declarative memory, both groups have mental-age appropriate immediate free recall of within-span or supra-span lists of unrelated items, as well as cued recall and paired associate learning. By contrast, recognition is largely unimpaired in HFA but moderately impaired in M-LFA; and free recall of meaningful or structured stimuli is moderately impaired in HFA but more severely impaired in M-LFA. Theoretical explanations of data on declarative memory in HFA identify problems in the integrative processing, or the consolidation and storage, of complex stimuli; or a specific problem of recollection. Proposed neural substrates include the following: disconnectivity of primary sensory and association areas; dysfunctions of medial prefrontal cortex, hippocampus or posterior parietal lobe; or combinations of these associated with neural disconnectivity. Hypothetically, perirhinal dysfunction might explain the more extensive declarative memory impairments in M-LFA. Foreseeable consequences of uneven memory abilities in HFA and M-LFA are outlined, including possible effects on language and learning in M-LFA. Finally, priorities for future research are identified, highlighting the urgent need for research on memory in lower-functioning individuals

Teaching Disruptive Students: An Indictment of Colorblind Teacher Education Programs

Teacher education programs do not sufficiently prepare White teachers to work with Black and Latino students in disciplinary alternative schools. From a critical race theory in education perspective, prepared White teachers are aware of their own ethnocentrism and, subsequently, develop anti-racist pedagogy and curricula

Feed system design and experimental results in the uhf model study for the proposed Urbana phased array

The effects of atmospheric turbulence and the basis for the coherent scatter radar techniques are discussed. The reasons are given for upgrading the Radar system to a larger steerable array. Phase array theory pertinent to the system design is reviewed, along with approximations for maximum directive gain and blind angles due to mutual coupling. The methods and construction techniques employed in the UHF model study are explained. The antenna range is described, with a block diagram for the mode of operation used

Recent Advances to Estimation of Fixed-Interface Modal Models Using Dynamic Substructuring

In 2010, Allen & Mayes proposed to estimate the fixed-interface modes of a structure by measuring the modes of the structure bolted to a fixture and then applying constraints to the fixture using the transmission simulator method. While the method proved useful, and has indeed been used in studies since that point, a few peculiarities were noted. First, in some cases the estimated fixed-base natural frequencies were observed to converge very slowly to the true values (in simulated experiments) as the number of constraints was increased. To formulate these constraints, prior studies used only the free-interface modes of the fixture or the measured modes of the assembly. This work extends that to consider other sets of constraints, showing improved results. Furthermore, in some prior studies it has been observed that there were errors of more than 10% in the natural frequencies even when the fixture motion was hundreds of times smaller than the motion of the structure of interest (and so it had presumably been removed). This work explores this phenomenon, seeking to use the strain energy in the fixture, to the extent that it can be estimated using a test-analysis model for the fixture, as a metric to predict frequency error. The proposed methods are explored by applying them to simulated measurements from a beam and from the NASA Space Launch System coupled to the Mobile Launcher

Pengaruh Suku Bunga Dan Produk Domestik Regional Bruto (PDRB) Terhadap Investasi Sektor Properti Di Kota Pekanbaru Periode 2002-2013

This study aims to determine the analysis of the Interest Rate and The Gross Domestic Regional Product (GDRP) Variable to Investment Property Sector in Pekanbaru. The data used in this study was a time series data from 2002 to 2013 were sourced from Bank Indonesia and Agency of city planning (Badan Perencanaan Kota). This study used quantitative research methods, and analyzed by using multiple linear regression analysis by using SPSS 21 software programfor Windows computers. In this study, the independent variable was Interest Rate (X1) and Gross Domestic Regional Product (GDRP) (X2) while the dependent variable was Investment Property Sector in Pekanbaru (Y). This study tested thehypothesis of regression coefficient (coefficient of determination, a significant test concurrent / F test, and the significant individual test / t test). The result showed the variable Interest Rate and Gross Domestic Regional Product (GDRP) at once / simultaneously had a significant influence on the Investment Property Sector in Pekanbaru. The individual test / partial showed that Gross Domestic Regional Product (GDRP) variable acquired that contributes greater than the variable Interest Rate to the Investment Property Sector in Pekanbar

Pengaruh Produk Domestik Bruto, Inflasi Dan Capital Account Terhadap Nilai Tukar Rupiah Atas Dollar Amerika Serikat Periode Tahun 2001-2014

This study aimed to analyze the influence of the Gross Domestic Product, inflation and Capital Account to the exchange rate on the US dollar. Variables used in this study is the rupiah, gross domestic product, Inflation and Capital Account.This study was conducted in Indonesia and using multiple linear regression analysis to test the hypothesis using SPSS version 20. The type of data used are time series starting from the year 2001 to 2014. Simultaneous test results (F) 0.010 2.228 means that GDP affect the exchange rate and inflation 2.391> 2.228 means inflation variables affect the exchange rate, while the capital account -0.498 <2.228, which means no significant effect on the exchange rate. Additionally obtained adjusted R-square value was 56.6%. This means that 56.6% of the rupiah against the dollar exchange rate movements can be predicted from the three variables, while 43.4% is explained by other variables