gebhart/patrepeval huggingface dataset:
Reduction of optical beat interference in SCM/WDMA networks using pseudorandom phase modulation (1994)

A new approach is suggested to reduce the optical beat interference (OBI) in subcarrier multiplexed (SCM) wavelength-division multiple access (WDMA) networks. The idea is to deliberately introduce independent random polarization fluctuations in the electric fields transmitted on each optical channel. Random polarization results in an expanded OBI spectrum, and hence, less OBI power at the reference user receiving filter output. Electro-optic phase modulation is used to introduce polarization randomness in the fields before they are coupled into the fibers, A two-user system was simulated. Simulation results show the drastic reduction in OBI power spectral density using appropriate PN signals.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
A Noninverting Buck–Boost DC–DC Switching Converter With High Efficiency and Wide Bandwidth (2011)

A novel dc-dc switching converter consisting of a boost stage cascaded with a buck converter with their coils magnetically coupled is presented. The disclosed converter has the same step-up or step-down voltage conversion properties than the single inductor noninverting buck-boost converter but exhibits nonpulsating I/O currents. The converter control-to-output transfer function is continuous between operation modes if a particular magnetic coupling is selected. The addition of a damping network improves the dynamics and results in a control-to-output transfer function that has, even in boost mode, two dominant complex poles without right-half-plane zeros. An example shows that an output voltage controller can be designed with the same well-known techniques usually applied to the second-order buck regulator. Details of a prototype and experimental results including efficiency, frequency, and time domain responses are presented. The experimental results validate the theoretical expected advantages of the converter, namely, good efficiency, wide bandwidth, and simplicity of control design.
Modified Frequency-Domain Equalization for Channel Shortening in Reduced-CP OFDMA Systems (2007)

In orthogonal frequency-division multiple access (OFDMA) systems, the cyclic prefix (CP) length needs to be no less than the longest delay spread of the channels of many users, reducing bandwidth efficiency more significantly than in single-user orthogonal frequency division multiplexing systems. In this paper, we address OFDMA downlink data transmission when a short CP is used to mitigate the inefficient bandwidth usage. Previous time-domain equalizers (TEQs) can be used to shorten the channel; however, they tend to increase noise by introducing spectral nulls. A previous work on per-tone equalization (PTEQ) structure involves a multitap frequency-domain equalizer (FEQ) for each tone, and shows better performance than TEQ-based receiver structure. We propose a novel receiver structure with only one-tap FEQ for OFDMA systems with a reduced CP, exploiting the unused subchannels for a user. We formulate an optimization problem to set the FEQ coefficients at the unused subchannels such that the channel is shortened (approximation is involved) and noise is not enhanced at the used subchannels. With the aid of computer simulations, it is demonstrated that the proposed equalization method is superior to the conventional TEQ-based receivers, and is comparable to the previous PTEQ-based receiver in terms of the achievable SNR, error performance, and bandwidth efficiency. Although the throughput curve versus synchronization delay of the PTEQ is smoother than that of the proposed receiver, the proposed method shows proper throughput over a wider range of the delay values than PTEQ receiver when the system parameters are set so that the complexities are comparable.
Modulation of post-operative insulin resistance by pre-operative carbohydrate loading (2002)

Insulin resistance develops as a response to virtually all types of surgical stress. There is an increasing body of evidence that suggests that insulin resistance in surgical stress is not beneficial for outcome. A recent large study in intensive-care patients showed that aggressive treatment of insulin resistance using intravenous insulin reduced mortality and morbidity substantially. Similarly, in burn patients, intensive insulin and glucose treatment has been shown to improve N economy and enhance skin-graft healing. In surgical patients insulin resistance has been characterized in some detail, and has been shown to have many similarities with metabolic changes seen in patients with type 2 diabetes. This finding may be important since insulin resistance has been shown to be one independent factor that influences length of stay. When patients about to undergo elective surgery have been treated with glucose intravenously or a carbohydrate-rich drink instead of overnight fasting, insulin resistance was reduced by about half. A small meta-analysis showed that when post-operative insulin resistance was reduced by pre-operative carbohydrates, length of hospital stay was shortened. Overnight intravenous glucose at high doses improved post-operative N economy. This type of treatment has also been shown repeatedly to reduce cardiac complications after open-heart surgery. Furthermore, if the carbohydrates are given as a drink pre-operatively, pre-operative thirst, hunger and anxiety are markedly reduced. In summary, preventing or treating insulin resistance in surgical stress influences outcome. Fasting overnight is not an optimal way to prepare patients for elective surgery. Instead, pre-operative carbohydrates have clinical benefits.
Steel Tubular Products (1990)

Abstract This article discusses tubular products made from wrought carbon or alloy constructional steels, particularly pipe, specialty tubing, and oil country tubular goods. The article covers product classifications, available specifications, chemical compositions, sizes, and other dimensional attributes. Some of the common types of pipe are standard pipe, conduit pipe, piling pipe, pipe for nipples, transmission or line pipe, water main and water well pipe, and pressure pipe. Pipe in suitable sizes and most products classified as tubing, both seamless and welded, may be cold finished. Pressure tubes, a separate classification, include double-wall brazed tubing, structural tubing, welded mechanical tubing, continuous-welded cold-finished mechanical tubing, and seamless mechanical tubing.
A user support system that optimizes dishwasher loading (2017)

Dishwashers are owned by less households than many of other home appliances in Japan. One of the reasons is that it is difficult and troublesome to decide the layout of dishes in a compact dishwasher rack. We develop an anytime algorithm with a genetic algorithm (GA) for optimization of dishwasher loading. This system shows the temporary best layout to human users with 3D graphics. The developed algorithm can provide dishwasher loading layouts in practical time. Moreover, the layouts are improved gradually because the anytime algorithm is used. Some optimization results for middle- and small-sized dishwashers are shown.
Extracting textured vertical facades from controlled close-range imagery (2003)

We are developing a system to extract geodetic, textured CAD models from thousands of initially uncontrolled, close-range ground and aerial images of urban scenes. Here we describe one component of the system, which operates after the imagery has been controlled or geo-referenced. This fully automatic component detects significant vertical facades in the scene, then extrudes them to meet an inferred, triangulated terrain and procedurally generated roof polygons. The algorithm then estimates for each surface a computer graphics texture, or diffuse reflectance map, from the many available observations of that surface. We present the results of the algorithm on a complex dataset: nearly 4,000 high-resolution digital images of a small (200 meter square) office park, acquired from close range under highly varying lighting conditions, amidst significant occlusion due both to multiple inter-occluding structures, and dense foliage. While the results are of less fidelity than that would be achievable by an interactive system, our algorithm is the first to be demonstrated on such a large, real-world dataset.
A tracking control method for boost and buck-boost converters using input current prediction and load current feedforward (2002)

This paper describes a new concept to control the output voltage of boost and buck-boost converters by combining some different control techniques such as input current prediction, output current feedforward and cycle-by-cycle (also called charge control) average-current control. The controller design is intended to force the output voltage to follow a time-varying reference signal such as a sinewave superimposed over a DC level (often called tracking control). Sliding-mode method is utilized but under a very simple form similar to the output current feedforward method because the converter model is now reduced to be only a first order system. Simulation results are shown for both boost and buck-boost converters in order to verify the control principle.
ChemInform Abstract: A Short, Facile Synthesis of 5‐Substituted 3‐Amino‐1H‐pyrrole‐2‐carboxylates. (2000)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
User Interaction Evolution in the SmartFactoryKL (2010)

In the SmartFactory KL the intelligent factory of the future, the consortium of companies and research facilities explores intelligent future technologies. Being a development and demonstration center for industrial applications, the SmartFactory KL is arbitrarily modifiable and expandable (flexible), connects components from multiple manufacturers (networked), enables its components to perform context-related tasks autonomously (self-organizing), and emphasizes user-friendliness (useroriented). This paper presents the outcomes of research in different user interaction methodologies for industrial environments. Today, in industrial environments most devices have their own stationary user interface directly attached to the device. Therefore users have to learn many different user interfaces and interaction devices from different vendors. To climb the ladder of evolution regarding interaction in future factories a mobile universal interaction device has been developed that is capable of communicating with various field devices and plant modules of an industrial facility via common wireless communication standards. A mobile Human Computer Interface like that has one user interface for all purposes, is non-proprietary and can be designed individually dependent on its owner« needs and desires. Furthermore a first approach on integrating technologies from Augmented Reality (AR) into industrial facilities recognizing natural interaction through an AR-tablet configuration is presented. Eye-tracking, awareness tools, machine learning, coordination, expertise
La elaboración del mito de Prometeo en las novelas de Torquemada (1980)

En las novelas contemporneas, Galds ha creado un retrato panormico de una realidad en que las crisis ntimas de los personajes tienen sus puntos de contacto con las crisis pblicas de la vida madrilea del siglo XIX.Por ejemplo, el problema econmico de Rosala de Bringas refleja un problema general de la clase media llena de pretensiones, y la tragedia personal de Villaamil es slo un ejemplo de la cesanta en que se encuentran muchos contemporneos del desafortunado protagonista de Miau.Esta tendencia galdosiana hacia una novela socio-personal se ve claramente en las novelas de Torquemada.La tragedia ntima de don Francisco -la muerte de su prodigioso hijo-se va enredando con la crisis de la familia del Aguila -la prdida de su riquezay en el micro-mundo Torquemada/Aguila, o pueblo/aristocracia, va resultando una nivelacin de clases sociales que refleja el fenmeno de la creciente clase media dentro de la ficticia sociedad urbana de Madrid creada en las novelas.Podemos decir, entonces, que la experiencia de Torquemada y de la familia del Aguila es representativa de un fenmeno social.El narrador de Torquemada en la hoguem habla de este fenmeno al decir que los Torquemada ((pasito a paso y a codazo limpio, se haban ido metiendo en la clase media, en nuestra bonachona clase media, toda.necesidades y pretensiones, y que crece tanto, tanto i ay, dolor!, que nos estamos quedando sin pueblo)) l.Una sociedad sin pueblo, ste es el fenmeno de Torquemadcz en la hoguera,
Molecular determinants of the physicochemical properties of a critical prion protein region comprising residues 106–126 (1999)

Prion diseases are marked by the cerebral accumulation of conformationally modified forms of the cellular prion protein (PrP(C)), known as PrP(res). The region comprising the residues 106-126 of human PrP seems to have a key role in this conformational conversion, because a synthetic peptide homologous with this sequence (PrP106-126) adopts different secondary structures in different environments. To investigate the molecular determinants of the physicochemical characteristics of PrP106-126, we synthesized a series of analogues including PrP106-126 H(D), PrP106-126 A and PrP106-126 K, with l-His-->d-His, His-->Ala and His-->Lys substitutions respectively at position 111, PrP106-126 NH(2) with amidation of the C-terminus, PrP106-126 V with an Ala-->Val substition at position 117, and PrP106-126 VNH(2) with an Ala-->Val substitution at position 117 and amidation of the C-terminus. The analysis of the secondary structure and aggregation properties of PrP106-126 and its analogues showed the following. (1) His(111) is central to the conformational changes of PrP peptides. (2) Amidation of the C-terminal Gly(126) yields a predominantly random coil structure, abolishes the molecular polymorphism and decreases the propensity of PrP106-126 to generate amyloid fibrils. (3) PrP106-126 V, carrying an Ala-->Val substitution at position 117, does not demonstrate a fibrillogenic ability superior to that of PrP106-126. However, the presence of Val at position 117 increases the aggregation properties of the amidated peptide. (4) Amyloid fibrils are not required for neurotoxicity because the effects of PrP106-126 NH(2) on primary neuronal cultures were similar to those of the wild-type sequence. Conversely, astroglial proliferation is related to the presence of amyloid fibrils, suggesting that astrogliosis in prion encephalopathies without amyloid deposits is a mediated effect rather than a direct effect of disease-specific PrP isoforms.
Embedded test for processor and memory cores in system-on-chips (2003)

Embedded processors are now widely used in system-on-chips. The computational power of such processors and their ease of access to/from other embedded cores can be utilized to test SoCs. The first step, naturally, is to test the processor itself and its memory partner, as all other SoC test activities require both. In this paper, an efficient test architecture is presented to achieve high quality testing of embedded processor and memory cores. Specially, in testing the memory core, we present a test algorithm for bit-oriented memories and its enhanced version for wordoriented memories. The method requires low overhead but provides significant flexibility in terms of fault model, test mechanism and future re-use.
Effect of the Additives in Sols on the Surface Roughness of the Coating Films Derived from Mixtures of Tetraethoxysilane- and Methyltriethoxysilane-Derived Sols (2003)

We have examined the influence of additives to coating sols, such as water, aldehyde, acetal, ester, carboxylic acid and several kinds of diols on the surface roughness of coating films with a ``concave-convex'' surface, derived from the mixtures of tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES). Among the additives tested, n-butyric acid and diols such as ethylene glycol, propanediol, butanediol or pentanediol increased the surface roughness of the resultant films. It was also found that the surface roughness (Ra) was controlled by changing the concentration of the additives and that the diols showed different effects among the isomers. Among normal butanediols, 1,4-butanediol of methylene-type diol was the most effective to increase Ra of the films, followed by 1,3-butanediol and then by 1,2-butanediol.
Transpapillary Miniscopy and Mini-Biopsy of the Pancreatic Duct (1990)

This paper reports on the new combined examination of peroral transpapillary fine-caliber endoscopy (miniscope 0.5 mm in diameter) with mini-biopsy of the pancreatic duct in 10 patients and 19 surgical pancreas resection preparations. With this technique, endoscopic-retrograde inspection of the whole length of the pancreatic duct is possible without the need for papillotomy. In the case of pancreatic duct changes due to carcinoma of the pancreas, and chronic pancreatitis, the ductal lesions can be inspected. Furthermore, with the aid of a new mini-biopsy forceps (1.5 mm in diameter), material for histological evaluation can be much more efficiently obtained than was normally possible with conventional biopsy forceps (2.2 mm). This new endoscopic-bioptic technique promises to improve the diagnostic reliability in pancreatic duct lesions requiring clarification.
Isolator component responsible for inhibition of Mycobacterium avium-M. intracellulare in BACTEC 12B medium (1997)

We previously reported an inhibitory effect on Mycobacterium avium-M. intracellulare (MAI) when blood collected and processed with the Isolator system was placed in BACTEC 12B bottles for radiometric monitoring. We sought to identify the specific component(s) of the Isolator lysis-anticoagulant reagent (LAR) responsible for the inhibitory effect. We added the three components of the LAR, saponin, polyanetholesulfonate, and polypropylene glycol (PPG), to triplicate sets of BACTEC bottles separately and in various combinations. These bottles were then seeded with 10(2) CFU of MAI. The growth index (GI) was observed over a 42-day period and was compared with the GI for a growth control bottle set with no reagents and with the GI for a bottle set containing an equivalent volume of LAR. Growth in all growth control bottles and those bottles containing no PPG reached the maximum GI (GI = 999) within 8 to 10 days. Growth in bottles containing PPG never reached the maximum GI before day 14. In addition, the GIs of one bottle containing all three reagent components as well as all of the bottles containing actual Isolator LAR failed to reach the maximum within 42 days. Our data suggest that PPG is the main cause of the inhibitory effect, but that a secondary synergistic interaction between all three of the reagents may also be present.
Voting algorithms (1994)

This paper presents efficient n-way plurality and threshold voting algorithms based on the type of voting (exact, inexact, or approval), rule for output selection (plurality or threshold) and properties of the input object space (size and structure). Exact voting is the most common voting method and is the easiest to implement. Inexact voting algorithms are more complicated due to intransitivity of approximate equality. In approval voting, each input to the voting process consists of a finite or infinite set of values that have been "approved" by the corresponding computation channel and the value, or set of values, with the highest approval voting must emerge as output. Multiple approved values can result from a nonunique answer to a given problem or from uncertainties in the solution process. For exact voting, the complexity of an n-way voting algorithm depends on the structure of the input object space. Threshold voting often requires less time and space, except when the threshold is very small. The author extends the techniques for designing efficient exact voting algorithms to inexact and approval voting schemes. Results show that optimal linear-time (in n) voting algorithms are available when the input object space is small. Next in the time-complexity hierarchy is the case of a totally-ordered object space that supports worst-case order-[n/spl middot/log(n)]-time algorithms for both exact and inexact voting as well as for certain approval-voting schemes.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Effect of the log-amplitude covariance function on the statistics of speckle propagation through the turbulent atmosphere (1980)

The extended Huygens-Fresnel principle has been used to make an analysis of the first- and second-order statistics of the received intensity for speckle propagation through the turbulent atmosphere. These formulations include the effects of the log-amplitude covariance as well as the wave structure function and represent a significant extension of previous work. It was found that, with the inclusion of the log-amplitude covariance, the normalized variance is dependent on the turbulence strength and rises above unity.
Difunctional and heterocyclic products from the ozonolysis of conjugated C5-C8-cyclodienes (1990)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDifunctional and heterocyclic products from the ozonolysis of conjugated C5-C8-cyclodienesKarl Griesbaum, In Chan Jung, and Henri MertensCite this: J. Org. Chem. 1990, 55, 24, 6024–6027Publication Date (Print):November 1, 1990Publication History Published online1 May 2002Published inissue 1 November 1990https://doi.org/10.1021/jo00311a021RIGHTS & PERMISSIONSArticle Views621Altmetric-Citations10LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (602 KB) Get e-Alertsclose Get e-Alerts
A serially-connected compensator for eliminating the unbalanced three-phase voltage impact on wind turbine generators (2015)

Untransposed transmission lines, unbalanced tap changer operations, and unbalanced loading in weak distribution lines can cause unbalanced-voltage conditions. The resulting unbalanced voltage at the point of interconnection affects proper gird integration and reduces the lifetime of wind turbines due to power oscillations, torque pulsations, mechanical stresses, energy losses, and uneven and overheating of the generator stator winding. This work investigates the dynamic impact of unbalanced voltage on the mechanical and electrical components of integrated Fatigue, Aerodynamics, Structures, and Turbulence (FAST) wind turbine generation systems (WTGs) of Type 1 (squirrel-cage induction generator) and Type 3 (doubly-fed induction generator). To alleviate this impact, a serially-connected compensator for a three-phase power line is proposed to balance the wind turbine-side voltage. Dynamic simulation studies are conducted in MATLAB/Simulink to compare the responses of these two types of wind turbine models under normal and unbalanced-voltage operation conditions and demonstrate the effectiveness of the proposed compensator.