gebhart/patrepeval huggingface dataset:
Service-oriented mobility management architecture for seamless handover in ubiquitous networks (2007)

In ubiquitous wireless LANs, a mobile node is likely to move between many access points while using certain applications. However, in the conventional Internet architecture, an MN can never inherently avoid the degradation in communication quality during handover. To achieve seamless handover, we propose a service-oriented mobility management scheme to address application quality. In this article, we first clarify three requirements for achieving seamless handover. We then describe our concept of the service-oriented mobility management scheme, which satisfies all three requirements. Our main contribution is the proposal of a scheme of how to properly use the number of frame retransmissions as a new handover-decision criterion to accomplish seamless handover. Performance evaluations show that our proposed scheme can maintain application quality during handover
Bond-selective photoacoustic imaging by converting molecular vibration into acoustic waves (2016)

The quantized vibration of chemical bonds provides a way of detecting specific molecules in a complex tissue environment. Unlike pure optical methods, for which imaging depth is limited to a few hundred micrometers by significant optical scattering, photoacoustic detection of vibrational absorption breaks through the optical diffusion limit by taking advantage of diffused photons and weak acoustic scattering. Key features of this method include both high scalability of imaging depth from a few millimeters to a few centimeters and chemical bond selectivity as a novel contrast mechanism for photoacoustic imaging. Its biomedical applications spans detection of white matter loss and regeneration, assessment of breast tumor margins, and diagnosis of vulnerable atherosclerotic plaques. This review provides an overview of the recent advances made in vibration-based photoacoustic imaging and various biomedical applications enabled by this new technology.
Dynamics of Bright and Dark Excitons in a Self-Assembled Quantum Dot (2005)

We report on a spin‐flip process in a charge tunable quantum dot in which a non‐radiative dark exciton, with angular momentum L = 2, becomes a radiative bright exciton, L = 1, through interactions with a Fermi sea in an n‐doped back contact. This process presents itself by a strongly bias dependent secondary lifetime in radiative lifetime measurements of the neutral exciton. By studying dots with different emission energies the spin‐flip process is shown to have a strong dependence on the tunneling rate between the dot and the back contact. An Anderson‐like Hamiltonian is used to model a coherent spin swap process between an electron in the dot and electrons in the back contact and gives very good agreement with the experiment.
Cyclophane, I. Ein einfacher Zugang zu funktionalisierten [2.2]Paracyclophanen (1987)

Abstract Die Umsetzung von [2.2]Paracyclophan ( 1 ) mit Oxalylchlorid unter Friedel‐Crafts‐Bedingungen liefert 3 in quantitativer Ausbeute. Dieses außergewöhnlich hydrolysestabile Säurechlorid ist ein universell einsetzbares Edukt für die Synthese unterschiedlich funktionalisierter [2.2]Paracyclophane. Mit Ammoniak und Aminen reagiert es zu den Amiden 2. 3 liefert nach Umsetzung mit Methanol 5 , aus dem durch Reduktion mit NaBH 4 7 als Diastereomerengemisch erhalten wird. Aus diesem wird mit PBr 3 8 hergestellt, das katalytisch zu 9 hydriert wird. Aus dem Ester 9 läßt sich durch LiAlH 4 ‐Reduktion 10 synthetisieren.
Mathematical analysis of the hemodynamic response during hemodialysis (2002)

A computer model was developed to cardiovascular response to hypovolemia hemodialysis. The main aspects included are: the systemic arterial and venous circulations, the Starling's law of the heart and the arterial and cardiopulmonary baroreceptor regulation of arteriolar resistance, venous unstressed volume and heart rate. The model was used to study the different hemodynamic responses of hypotension-prone and hypotension-resistant patients to the hemodialysis-induced hypovolemia. Arterial pressure, heart rate and blood volume were measured during the dialysis in six patients. Blood volume changes were used as input to the model and the time patterns of mean arterial pressure and heart rate were reproduced, by adjusting a few parameters which characterize the autonomic regulatory system. The analysis performed with the model suggests that the behavior of hypotension-prone and hypotension resistant patients can be explained by a different strength of regulatory mechanisms and by a different vascular refilling rate.
Diagnosis of Parkinson's disease from continuous speech using deep convolutional networks without manual selection of features (2016)

Parkinson's Disease (PD) is a relatively common neurodegenerative disabling disease. It affects central nervous system with profound effect on the motor system. The most common symptoms include slowness, rigidity and tremor during motion. It has been suggested that the vocal cords are among the first one to be affected and thus the speech is affected at very early stage of the disease and continues to deteriorate as the disease progress. In this work, we focus on automating the process of diagnosis from continuous native speech by removing the necessity of a trained personal from the diagnosis process. This is done by using an adaptation of Convolutional Neural Network (CNN) architecture for one-dimensional signal processing (i.e. raw speech signal) on a relatively small training set. This is a continuation to previous works where we showed (i) that this task can be achieved by using manually-extracted features of the speech (such as formants and their ratios) and (ii) by using an automatic process of auditory features extraction, where the features were selected by signal processing specialist.
GPU Acceleration of Nonbonded Forces for Molecular Dynamics Simulation (2009)

The most costly computation required by molecular dynamics(MD) is the calculation of non-bonded forces.This paper presents two algorithms based on CUDA and Brook+ to accelerate the calculation of non-bonded forces and then examines them on two popular GPUs of NVIDIA and AMD.The algorithms enable fine-grained task decomposition and spatial decomposition of forces that map efficiently to the compute units of GPU.They also present optimization methods such as use of shared memory between threads and strip-mined.We then test our implementations for 432 thousand atoms.Our code executed on Tesla C1060 runs 6.5 times faster than the original application running on single core of Intel Intel Xeon 2.6GHZ CPU,while on HD4870 it runs 4.8 times faster.
Bidding Considerations in Developing Countries (1998)

Developing countries pose greater challenges to international construction contractors because of inherent risks such as government instability, shortages of adequately trained craftsmen, difficulty in acquiring needed materials, and lack of adequate infrastructure such as roads, bridges, harbors, and power generation facilities. The international construction market is continuously growing, and there are many opportunities for U.S. contractors to obtain additional work and improve profits. This paper describes characteristics of developing countries that should be of interest to any contractor considering projects in these parts of the world. Additionally, results from a study identify the top information requirements in 15 key areas, which architectural, engineering, and construction (AEC) firms identified. A discussion of characteristics of the construction environment in Kenya is provided as an example of bidding considerations in a typical developing country.
Data Processing and Information Transmission for Space (1962)

This paper reviews and predicts the roles that data processing and information transmission have played, and will play, in space. The trend toward digital transmission is shown to be a result of increasing requirements for precision, reliability, high information rates, and long paths. Thus, data processing and transmission techniques appear to be converging rapidly, both because of the advantages of digital communication systems and because of the predicted weight and volume reductions for computer equipment. Many improvements in transmission efficiency will result from this merging of techniques, notably in the areas of data compaction and computer-controlled adaptive communications. The problem of maintaining a satisfactory SNR in spite of the signal loss from space attenuation is reviewed. General trends in the techniques designed to improve this ratio are reported and several promising developments are emphasized. Among these are the use of signals with large bandwidth-time products, maser amplifiers, and a novel telemetry system which provides high antenna gain with a greatly reduced orientation problem and eliminates spacecraft transmitting equipment by transferring it to earth.
Simultaneous Determination of Molecular Orientation and Surface Concentration in Anisotropic Monolayers on Liquid Substrates (1993)

A new method is developed for the simultaneous determination of chain orientation and surface concentration in monolayers on liquid substrates. The method is based on the use of s- and p-polarized reflection-absorption (RA) infrared intensities in conjunction with an optical model that includes anisotropy in the optical constants. The advantages and limitations of the method are explored in detail. A modeling assessment of the RA p /RA s ratio leads to information on how the ratio can be used to qualitatively interpret RA spectra. Spectral simulations are given that address the issues of frequency shifting and band distortion in reflection-absorption due solely to optical considerations. Experimental spectra of sodium dodecyl sulfonate are collected as soluble monolayers at the air/water interface. The spectral intensities are used to calculate the chain orientation, the surface concentration, and the associated errors. The surface concentration is compared with that predicted from surface tension isotherms.
On Privacy Losses in the Trusted Agent Model (Abstract). (2009)

Tamper-proof devices are pretty powerful. They typically make security applications simpler (provided that the tamper-proof assumption is not violated). For application requiring privacy, we observe that some properties may become harder (if possible at all) to achieve when devices are maliciously used. We take the example of deniability, receipt-freeness, and anonymity. We formalize the trusted agent model which assumes tamper-proof hardware in a way which captures the notion of programmable secure hardware. This model defines a functionality relative to which deniability requires provers to use a tamper proof hardware. Otherwise, any asymmetric situation in which the malicious verifiers have more powerful tamper-proof devices than the honest ones makes deniability impossible. We conclude by observing that the ability to put boundaries in computing devices prevents from providing full control on how private information spreads: the concept of sealing a device is in some sense incompatible with some privacy notions.
Liver transplantation at Cleveland Clinic. (2010)

This review describes our program and its outcomes and then provides an in-depth focuses into many of the unique aspects of our practice that have been important to the success of the program. These include a global appreciation for the impact and various presentations of chronic portal hypertension. We have sought to better understand and describe the various effects it can have on local allograft hemodynamics and graft survival. Intraoperative blood flow measurements of the hepatic artery and portal vein are important. Postoperative follow-up with Doppler ultrasound has been essential for both partial and whole grafts. A better understanding of systemic and graft hemodynamics has changed our clinical practice with regards to the intra- and post-operative management of the hepatic artery and portal vein. We have also focused on the issue of hepatocellular carcinoma, one of the major indications for liver transplantation. We have sought to better understand the heterogeneous clinical presentations of this disease and how to best approach them in a multidisciplinary fashion. Finally, we describe the various methods we have utilized to increase the number of hepatic grafts available for our patients. We have aggressively utilized all forms of grafts; living and deceased; partial and whole; and extended and standard criteria donors. We have done this with the focus on living donor safety and then concentrated on finding the best graft for the individual patient in the context of the national allocation systems in which we all work.
Real-Time On-Line Performance Diagnostics of Heavy-Duty Industrial Gas Turbines (2002)

This paper describes the results of real-time, on-line performance monitoring of two gas turbines over a period of five months in 1997. A commercially available software system is installed to monitor, analyze and store measurements obtained from the plant’s distributed control system. The software is installed in a combined-cycle, cogeneration power plant, located in Massachusetts, USA, with two Frame 7EA gas turbines in Apr. 1997. Vendor’s information such as correction and part load performance curves are utilized to calculate expected engine performance and compare it with measurements. In addition to monitoring the general condition and performance of the gas turbines, user-specified financial data is used to determine schedules for compressor washing and inlet filter replacement by balancing the associated costs with lost revenue. All measurements and calculated information are stored in databases for real-time and historical trending and tabulating. The data is analyzed ex post facto to identify salient performance and maintenance issues.
Fast rendering of irregular grids (1996)

We propose a fast algorithm for rendering general irregular grids. Our method uses a sweep-plane approach to accelerate ray casting, and can handle disconnected and nonconvex (even with holes) unstructured irregular grids with a rendering cost that decreases as the disconnectedness decreases. The algorithm is carefully tailored to exploit spatial coherence even if the image resolution differs substantially from the object space resolution. In this paper, we establish the practicality of our method through experimental results based on our implementation, and we also provide theoretical results, both lower and upper bounds, on the complexity of ray casting of irregular grids.
Regiospecific photosensitized oxygenation of vinylsilanes. A method for converting saturated ketones to 1,2-transposed allylic alcohols. Possible role of silicon in directing the regioselectivity of epoxysilane cleavage reactions (1979)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRegiospecific photosensitized oxygenation of vinylsilanes. A method for converting saturated ketones to 1,2-transposed allylic alcohols. Possible role of silicon in directing the regioselectivity of epoxysilane cleavage reactionsWilliam E. Fristad, Thomas R. Bailey, Leo A. Paquette, Rolf Gleiter, and Michael C. BoehmCite this: J. Am. Chem. Soc. 1979, 101, 15, 4420–4423Publication Date (Print):July 1, 1979Publication History Published online1 May 2002Published inissue 1 July 1979https://pubs.acs.org/doi/10.1021/ja00509a084https://doi.org/10.1021/ja00509a084research-articleACS PublicationsRequest reuse permissionsArticle Views243Altmetric-Citations55LEARN 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 InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Relevance of genetically modified crops in light of future environmental and legislative challenges to the agri‐environment (2008)

Abstract A key challenge for countries like Ireland up to 2030 is to produce sufficient supplies of food, feed and fuel, without compromising on public health or negatively impacting the environment. As we progress through the technology era, certain agricultural technologies [e.g. genetically modified (GM) crops] have been championed to maximise production while minimising environmental impact. Yet, multiple arguments have been made to counter such a claim, which has led to a polarisation of opinions and a plethora of generic commentaries being made in regard to the impact of this technology. Yet, few studies within the European Union (EU) have conducted a critical needs analysis to assess the potential of specific GM traits in light of issues, such as climate change, increased environmental legislation (e.g. EU Water Framework, Nitrates Directive, proposed reform to the Pesticide Directive and Common Agricultural Policy reform), mitigating biodiversity loss and sustainable biofuel production. The goal of this study is to collate a register of GM traits such that a list of potential GM crops could be prioritised against the backdrop of the challenges facing the tillage sector. Clearly, the crops with the most significant potential for genetic modification are those that are grown widely and/or receive high applications of pesticides and fertilisers (e.g. potato, wheat, barley and maize). GM traits with significant agronomic potential include late blight resistant potato, Fusarium head blight resistant wheat and Septoria resistant wheat and herbicide‐tolerant winter oilseed rape and maize. Following on from these, crops with enhanced nitrogen‐use efficiency could provide significant input to the tillage sector in light of EU‐based restrictions on nitrogen usage, crops with elevated protein content could offset the costs of imported animal feed and crops with modified oil content/lignocellulose composition could assist in biodiesel/bioenergy production at a regional level. This study is relevant to other European countries that cultivate similar crops and like Ireland, are facing multiple challenges to their tillage sector in the near future.
PAH emission from a gasoline‐powered engine (1996)

Abstract A gasoline powered engine operated on a dynamometer was used to investigate the PAH (Polycyclic Aromatic Hydrocarbons) emission. A 95‐leadfree gasoline (95‐LFG) and a premium leaded gasoline (PLG) were used as power‐fuels. The engine was simulated for the idling condition and for the cruising speeds at 40, 80 and 110 km/hr. The concentrations of 21 individual PAHs in the engine exhaust, gasolines, and the ambient air were determined. Engine exhaust samples were collected by a PAH sampling system, while the ambient air sample was collected by using a standard PS‐1 sampler. Twenty one individual PAHs were analyzed primarily by a gas chromatography/mass spectrometer (GC/MS). Naphthalene (Nap) has the highest concentration in the liquid phase of both 95‐LFG and PLG, in which it accounts for respectively 98.3% and 76.6% of the total PAH. In term of the mean fraction of the total PAHs entering the 95‐LFG and PLG engines, the ambient air contributed less than 0.108% and 0.012%, respectively. Gasoline is the major PAH supplier for the automobile engine. By monitoring the PAH output/input mass ratios, the fuel combustion was found to be a generation process for 11 PAHs ‐ Flu, Ant, FL, Pyr, CYC, BaA, CHR, BbF, BkF, BaP and BeP; and a depletion process for the rest 10 PAHs ‐ Nap, AcPy, Acp, PA, PER, IND, DBA, BbC, BghiP and COR , in both 95‐LFG and PLG powered engines. The mean emission factors of BaP were 2.92 and 2.47 μg/km for 95‐LFG and PLG powered engines, respectively.
Phosphane and Bis(phosphane) Ligands from Phosphinic Acids (2000)

The Boyd−Regan methodology allowed for access to various cyclic or benzylic mono- and bis(phosphinic acids) 1−6. The reduction of monophosphinic acids to secondary phosphanes 7−9 was achieved with silanes. On the other hand, reduction of the bis(phosphinic acids) with LiAlH4 led to bis(phosphanes) 12−13. Various cyclic phosphanes and bis(phosphanes) were obtained by the alkylation of these secondary phosphanes (as their borane adducts). The Michael addition of the same borane adducts to vinylic phosphonates led to phosphane−phosphonates which could be hydrolysed to new hydrosoluble phosphanes.
Catalytic reactions of CO and H/sub 2/O over ruthenium in a Y-type zeolite (1982)

When the Ru(NH/sub 3/)/sub 6//sup 3 +/ complex in a Y-type zeolite was reduced in H/sub 2/ to 380/sup 0/C, the resulting sample was an active catalyst for the Koelbel-Engelhardt and water gas shift reactions. Following reduction, the ruthenium was located within the zeolite framework in the form of small particles less than 30 A in diameter. The Koelbel-Engelhardt reaction proceeds via a sequential reaction pathway involving the water gas shift reaction followed by the methanation reaction. The only hydrocarbon observed at 300/sup 0/C was CH/sub 4/. Under conditions favorable for CH/sub 4/ formation, the water gas shift reaction jumped to equilibrium conversions. This was attributed to a localized heating of the catalyst particles due to the exothermic nature of the methanation reaction. The kinetic parameters for the water gas shift reaction were determined in a continuous flow reactor operating at high flow rates. Comparison of the RuY to Ru/Al/sub 2/O/sub 3/ or Ru/SiO/sub 2/ demonstrates that the support does not play a major role in this reaction. Mechanistic studies indicate that the slow step may involve the interaction of an adsorbed OH species with an associatively adsorbed CO. 6 figures, 4 tables.