1,218 research outputs found
Carboxylation of carbenes in low-temperature matrixes
No full textPT: J; CR: ADAM W, 1971, J AM CHEM SOC, V93, P557 ADAM W, 1973, J ORG CHEM, V38, P2269 BAMFORD WR, 1952, J CHEM SOC, P4735 BONNEAU R, 1989, J CHEM SOC CHEM COMM, P510 CHAMPAM OL, 1972, J AM CHEM SOC, V94, P1365 COE PL, 1982, J CHEM SOC CHEM COMM, P362 EISENTHAL KB, 1985, TETRAHEDRON, V41, P1543 GANZER GA, 1986, J AM CHEM SOC, V108, P1517 GOULD IR, 1985, TETRAHEDRON, V41, P1587 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 GRILLER D, 1985, TETRAHEDRON, V41, P1525 LIU MTH, 1980, J CHEM SOC CHEM COMM, P1482 LIU MTH, 1987, TETRAHEDRON LETT, V28, P1011 MALTSEV AK, 1985, IAN SSSR KH, P2159 MCMAHON RJ, 1987, J AM CHEM SOC, V109, P2456 MILLIGAN DE, 1962, J CHEM PHYS, V35, P2911 MOSS RA, 1989, ACCOUNTS CHEM RES, V22, P15 PLATZ MS, 1990, KINETICS SPECTROSCOP, P239 PUZA M, 1971, SYNTHESIS-STUTTGART, P481 SANDER W, 1988, ANGEW CHEM INT EDIT, V27, P572 SANDER W, 1988, ANGEW CHEM, V100, P577 SANDER W, 1988, J ORG CHEM, V53, P2091 SANDER W, 1990, ANGEW CHEM INT EDIT, V29, P344 SANDER W, 1990, ANGEW CHEM, V102, P362 SANDER WW, 1987, SPECTROCHIM ACTA A, V43, P637 SANDER WW, 1989, J ORG CHEM, V54, P333 SANDER WW, 1989, J ORG CHEM, V54, P4265 SIEBRAND W, 1986, ACCOUNTS CHEM RES, V19, P238 WHELAND R, 1970, J AM CHEM SOC, V92, P6057; NR: 29; TC: 22; J9: J ORG CHEM; PG: 3; GA: HB875Source type: Electronic(1
What Is It Like to Be a Bat-Author? Viktor Pelevin's Empire V
No full textIn this paper, Viktor Pelevin's novel Empire V (2006) is analysed, with its main concern with the status of language, in fiction as well as in contemporary Russian culture. The work is seen as a kind of sequel to Generation 17: whereas that novel predominantly focused on the problem of consciousness, its problematical relation with reality, but expressed this problem in language, in Empire V the problem of language as the form of consciousness is foregrounded; inevitably thus the status of the text we are reading and the relation it has to its author is problematized - as is the relation it has to its reader. It is a text that reflects on what language, its material, does. The possibility is suggested that this novel tries to rind a way out of postmodernism's anxieties about the conscious personality being an illusion, created by his own language.</p
What Is It Like to Be a Bat-Author? Viktor Pelevin's Empire V
No full textIn this paper, Viktor Pelevin's novel Empire V (2006) is analysed, with its main concern with the status of language, in fiction as well as in contemporary Russian culture. The work is seen as a kind of sequel to Generation 17: whereas that novel predominantly focused on the problem of consciousness, its problematical relation with reality, but expressed this problem in language, in Empire V the problem of language as the form of consciousness is foregrounded; inevitably thus the status of the text we are reading and the relation it has to its author is problematized - as is the relation it has to its reader. It is a text that reflects on what language, its material, does. The possibility is suggested that this novel tries to rind a way out of postmodernism's anxieties about the conscious personality being an illusion, created by his own language.</p
What Is It Like to Be a Bat-Author? Viktor Pelevin's Empire V
No full textIn this paper, Viktor Pelevin's novel Empire V (2006) is analysed, with its main concern with the status of language, in fiction as well as in contemporary Russian culture. The work is seen as a kind of sequel to Generation 17: whereas that novel predominantly focused on the problem of consciousness, its problematical relation with reality, but expressed this problem in language, in Empire V the problem of language as the form of consciousness is foregrounded; inevitably thus the status of the text we are reading and the relation it has to its author is problematized - as is the relation it has to its reader. It is a text that reflects on what language, its material, does. The possibility is suggested that this novel tries to rind a way out of postmodernism's anxieties about the conscious personality being an illusion, created by his own language.</p
From Sander to Schiavo: Morality, Partisan Politics, and America’s Culture War over Euthanasia, 1950–2010
No full textThe article discusses cultural conflicts and social policies regarding euthanasia in the United states from 1950 to 2010. The author highlights high-profile legal cases related to euthanasia including, the trial of Dr. Herman Sander, the first U.S. physician to stand trial for euthanasia, the case surrounding the termination of coma-patient Terri Schiavo's life support, and the trial of physician Jack Kevorkian. Other topics discussed include the impact of moral activism on politics, U.S. President Ronald Reagan's views on euthanasia, and the U.S. Supreme Court's rulings in euthanasia cases
Using SAGE on COTS UWB signals for TOA estimation and body shadowing effect quantification
No full textThis work assesses the applicability of the well-known SAGE algorithm for time-of-arrival estimation on ultra-wideband (UWB) measurements taken with cheap COTS hardware. Performance is comparable with a simple leading-edge detection (LDE) algorithm, establishing a general precision of approximately 30 cm/60 cm. SAGE performance is slightly worse in general (33 cm/71 cm), but is more stable in non-line-of-sight (NLOS) caused by human body presence. A more detailed breakdown of the effect of incidence angle on one-dimensional ranging accuracy is studied in relationship to human body shadowing effects. Within a cone of 135 degrees in front of the UWB device (pointing away from the body), the azimuthal incidence angle has no influence on the ranging performance of either algorithm
Desain Rangka Mesin Bandsaw Dan Belt Sander
No full textProgress in the increasingly developing field of technology is an aspect of knowledge and technology that requires higher education to be able to increase their ability to master technology. The purpose of converting energy to machines is to help make human work easier. Plywood/wood cutting machine saw from manual becomes a useful machine for Bengkalis State Polytechnic students. The objectives are 1. To make it easier for the user when cutting plywood, 2. To find out the design process for the bandsaw machine frame and belt sander, 3. To know the planning procedures for the bandsaw machine frame design and belt sander. Study literature used by the author by looking for references related to design to create a project.
In this process, the authors designed a bandsaw and belt sander frame design where the design will be designed in such a way and function as a reference in the process of making the tool, this tool uses an unp iron frame 80 x 45 x 5 mm and hollow iron 30 x 30 x 1.8 mm by using a 1-phase electric motor and also using 2 wheels. This bandsaw saw machine is for cutting plywood and wood of small and large sizes. Belt sander for the sanding process after cutting which is a design with a scale of 1:100.
Keywords: Design Bandsaw And Belt Sander Desig
IMU-aided detection and mitigation of human body shadowing for UWB positioning
No full textUltra-wideband (UWB) indoor positioning systems have the potential to achieve decimeter-level accuracy. However, the performance can degrade significantly under Non-Line-of-Sight (NLoS) conditions. Detection and mitigation of NLoS conditions is a complex problem, and has been the subject of many works over the past decades. When localizing pedestrians, human body shadowing (HBS) is an important cause of NLoS. In this paper, we propose an HBS mitigation strategy based on the orientation of the body and tag relative to the UWB anchors by attaching an inertial measurement unit to the UWB tag. Two algorithms are designed and implemented, of which the second algorithm is designed for robustness against errors in the IMU's estimated heading. The proposed algorithms are validated by UWB Two Way Ranging (TWR) measurements, performed in two environments. Two more algorithms are implemented as a benchmark, of which one is based on the estimated first path power, and the other is based on range residuals. The proposed algorithm outperforms the other algorithms in the higher error statistics, achieving a 49% reduction of the p90 error depending on the environment
Using SAGE on COTS UWB Signals for TOA Estimation and Body Shadowing Effect Quantification
No full textNoise-based threshold ranging method using region-of-interest in UWB signals
No full textUltrawideband (UWB) ranging algorithms using thresholding require careful settings that account for multipath richness. Max-peak ratio thresholds are incapable of detecting attenuated first path components (FPCs) or risk triggering on noise. A noise-based threshold is more reliable and robust, but setting this threshold transforms the problem into distinguishing noise from signal. For a limited-length channel impulse response (CIR) from a commercial off-the-shelf (COTS) device, this presents a major challenge. This article presents a novel algorithm to perform this task. We break down the problem into parts, distinguishing a noise-only region on which to base the value of the final threshold from a region-of-interest (RoI) where the FPC can be found. We present a thorough investigation into ranging performance and parameter sensitivity in different environments using both the synthetic and empirical data sources. Our approach achieves on- par performance with the DW1000 on- chip algorithm on an industrial dataset, having an absolute error precision of 37 (90th percentile, P90) and 28 cm [mean absolute error (MAE)]. This is around 5-20 times better than other established low-complexity algorithms such as the max-ratio algorithm (P90: 7.48 m, MAE: 1.73 m) and the leading-edge detection (LDE) algorithm (P90: 4.39 m, MAE: 1.26 m)
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