5,611 research outputs found
A PC parallel port button box provides millisecond response time accuracy under Linux
No full textFor psychologists, it is sometimes necessary to measure people's reaction times to the nearest millisecond. This article describes how to use the PC parallel port to receive signals from a button box to achieve millisecond response time accuracy. The workings of the parallel port, the corresponding port addresses, and a simple Linux program for controlling the port are described. A test of the speed and reliability of button box signal detection is reported. If the reader is moderately familiar with Linux, this article should provide sufficient instruction for him or her to build and test his or her own parallel port button box. This article also describes how the parallel port could be used to control an external apparatus
Stone Wall
No full text35 mm slide, close-up of a stone wallDrawer info: Hanson - Hughes;Kodachrome Slide Roll 7 HN-PC-1 Canton Bridge 6 Aug 85D
A comparison of cognitive function, sleep and activity levels in disease-free breast cancer patients with or without cancer-related fatigue syndrome.
No full textChronic fatigue is a feature in a subset of women successfully treated for breast cancer but is not well characterised. This study examines differences in objective cognitive function, activity levels and sleep in disease-free women who do and do not meet criteria for cancer-related fatigue syndrome (CRFS)
Millisecond accuracy video display using OpenGL under Linux
No full textTo measure people’s reaction times to the nearest millisecond, it is necessary to know exactly when
a stimulus is displayed. This article describes how to display stimuli with millisecond accuracy on a
normal CRT monitor, using a PC running Linux. A simple C program is presented to illustrate how this
may be done within X Windows using the OpenGL rendering system. A test of this system is reported
that demonstrates that stimuli may be consistently displayed with millisecond accuracy. An algorithm
is presented that allows the exact time of stimulus presentation to be deduced, even if there are relatively
large errors in measuring the display time
Frontmatter (Titlepage, Table of Contents, Author List, PC List, Reviewer List)
No full textFront matter including table of contents, author list, PC list, and reviewer list
High efficiency implementation of PC and PC stable algorithms yields three-dimensional graphs of information flow for the Earth' atmosphere
No full textSeptember 3, 2014.Causal discovery algorithms have recently been applied to several climate applications. In particular, in prior work we have developed methods to recover pathways of interaction in the global climate system, using the classic PC algorithm. However, standard implementations of the PC algorithm cannot handle the large number of variables and temporal models required for this application. This technical report shows that a more efficient implementation of the PC algorithm can provide speed gains of a factor of 1,000 or more. This in turn enables us to calculate graphs of information flow with much higher resolution grids. Furthermore, we can now - for the first time ever - calculate information flow graphs that extend over three dimensions, i.e. rather than just including one layer of the planet's atmosphere we can now capture interactions across several height layers
Uji Kuat Tekan Paving Stone dengan Menggunakan Bahan Tambahan Abu Terbang Batu Bara (Fly Ash) dan Batu Abu (Milled Stone)
No full textPembuatan paving stone pada umumnya menggunakan bahan dasar berupa Semen Portland, Agregat halus (pasir) dan Agregat kasar (kerikil) yang telah ditetapkan formulanya. Namun untuk mengurangi biaya produksi pengusaha industri paving blok berinovasi memberikan bahan tambahan berupa abu terbang batubara (Fly Ash) dan batu abu (Milled Stone) Penelitian ini dimaksudkan untuk mengetahui kekuatan tekan paving stone paling kuat hingga paling lemah yang dapat dicapai pada formulasi komposisi bahan campuran pembuatannya. Paving stone dalam penelitian ini menggunakan bahan campuran tambahan yaitu abu terbang dan batu abu.. Sampel yang digunakan panjang 20.5 cm, dan lebar 10.0 cm dan tebal 6.0 cm total 80 buah simple yang ditentukan menurut perbandingan berat dan terdiri dari: Type A = 1 Portland cement (PC) : 5.3 Pasir (PS) : 2.3 Kerikil (KR) : 0.3 Abu terbang (AT) : 2.7 Batu Abu (BA) ; Type B =. 1 PC : 5.3 PS : 2.3 KR : 2.7 BA(tanpa abu terbang) ; Type C =. 1 Pc: 5.3 PS : 2.3 KR : 0.3 AT (tanpa batu abu) ; Type D = 1 PC : 5.3 PS : 2.3 KR (tanpa abu terbang dan tanpa batu abu). Hasil pengujian kuat tekan menunjukkan berturut-turut dari yang paling baik hingga kurang baik baik kualitas kuat tekannya, yaitu Type D = 297.2 kg/cm² (paling baik), Type A = 263.00 kg/cm²(baik), Type C = 240.56 kg/cm² (cukup baik) dan Type B = 191.64 kg/cm².(kurang baik)
State variable simulation package for IBM-PC
No full textThis thesis was scanned from the print manuscript for digital preservation and is copyright the author.
Researchers can access this thesis by asking their local university, institution or public library to
make a request on their behalf. Monash staff and postgraduate students can use the link in the References field
Degradation of bisphenol-a-polycarbonate (BPA-PC) optical lenses under simulated harsh environment conditions
No full textThis paper investigates degradation and failure mechanisms of BPA-PC lenses in simulated harsh environment conditions. Exposure of secondary optics in Light Emitting Diode LED-based systems or any other similar applications to environmental stresses can adversely effect the performance and lifetime of products. This paper simulates a harsh environment condition, using a salt bath oven. Salt spray exposure/ageing tests at 45° C were carried out up to four months. Fourier transform infrared-attenuated total reflection FTIR-ATR spectrometer and Lambda 950 Ultraviolet-Visible (UV-VIS) spectrophotometer were used to study the optical and chemical characteristics of aged plates. Results showed that salt bath exposure test resulted in the severe deterioration of optical characteristics BPA-PC samples. Degradation of optical properties of BPA-PC plates is attributable to the oxidation of samples.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic Components, Technology and Material
Specialist 'restoration mortars': a comparison of the physical properties ot two stone repair materials
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