gebhart/patrepeval huggingface dataset:
Research and improving on speckle MMSE filter based on adaptive windowing and structure detection (2006)

The appearance of speckle makes it difficult for image segmentation, classification and target detection. By analyzing MMSE filter and the enhanced one, it can be seen that although these filters are better trade-off between noise reduction and fine detail preserving, a basic premise is required for all statistic filters that the sample mean and variance of a pixel is equal to its local mean and variance based on pixels within a neighborhood surrounding it. It is validated only if the filtering area is large enough to assure the sample calculation robust and doesn't contain edge features, linear features or point targets for stationary assumption. An improved filter based on adaptive windowing and structure detection is proposed in this paper. This filter outputs the mean intensity of filtering area in homogeneous region. Maximum homogeneous filtering area decided by adaptive windowing technique is required to keep sample calculation robust. Structure feature such as line, edge and point target may appear in heterogeneous region and this invalidates the basic premise of stationary for all local statistic filters. Point target is preserved owing to special distribution and maximum window subset of linear and edge feature is decided by using different ratio detectors. Filtering process is accomplished calculating local statistics in window subset determined. Experiments on simulated image and real SAR one demonstrate that the improved MMSE filter proposed for speckle noise is superior both in noise reduction and in fine detail preserving.
An algorithm for diagnosing two-line bridging faults in combinational circuits (1993)

Article An algorithm for diagnosing two-line bridging faults in combinational circuits Share on Authors: Sreejit Chakravarty View Profile , Yiming Gong View Profile Authors Info & Claims DAC '93: Proceedings of the 30th international Design Automation ConferenceJuly 1993 Pages 520–524https://doi.org/10.1145/157485.165012Online:01 July 1993Publication History 48citation177DownloadsMetricsTotal Citations48Total Downloads177Last 12 Months2Last 6 weeks1 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteGet Access
Tierexperimentelle Ergebnisse mit einem neuen Kavafilter (1985)

A new cava filter has been tried in 23 dogs weighing between 16 and 23 kg. The filter consists of a stainless steel basket which can be introduced either antegrade or retrograde through a 10F teflon catheter and which can be removed again within the first four days. The filter was effective in holding back embolising thrombus. In the early stages, even without artificial embolisation, two out of five animals showed clot formation in the basket. After three or four months, all the filters were permeable and on only two occasions was a small amount of thrombus found.
PUFSSL: An OpenSSL Extension for PUF based Authentication (2018)

Connected devices in Internet-of-Things (IoT) framework have become more functional and commonplace in modern day-to-day living recently. One of the major security challenges in IoT framework is authentication and key management and hence, rigorous security analysis of these networked devices has been surfaced on demand. In this work, first we show how our recent work on designing certificate-less authentication and key exchange scheme using Physically Unclonable Functions (PUF) and Identity based Encryption (IBE) aptly fits this scenario and can be integrated with TLS layer for widespread deployment. Next, we propose an idea to modify the Handshake Protocol in the SSL/TSL layer for authentication of client-server pair and secret key share, substituting the RSA/DSA certificate exchange with the proposed PUF based scheme. For validation, we implement the proposed client-server authentication and key exchange modules in OpenSSL and compare it with RSA/DSA/ECDSA certificate sign and verify modules along with ECDH key generation module which already exist in OpenSSL. We finally discuss the pros and cons of of the proposed approach in the paper.
William S. Stokes (1967)

An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
Optimal Adaptation Trajectories for Block-Request Adaptive Video Streaming (2013)

Block-Request Adaptive Streaming (BRAS), in form of its most prominent representative HTTP-Based Adaptive Streaming (HAS), is about to become the dominating technology for video delivery over the Internet. One of the challenges in the development of BRAS clients is the design of mechanisms that dynamically adapt the streamed video quality to network conditions, in order to maximize user's Quality of Experience (QoE). The main contribution of this paper is an approach to calculating optimal adaptation trajectories. This approach not only allows to benchmark the performance of any streaming client, it also provides the possibility to study the impact of the networking environment, and of configuration parameters such as the start-up delay, number of available video representations, etc., on the achievable streaming performance. Since, to the best of our knowledge, there exist no widely accepted or standard approach to measure QoE for BRAS, we alternatively maximize the average video bit-rate, minimize the number of quality switches, and impose a hard constraint on the absence of rebuffering events. Further, we evaluate two HAS clients, Microsoft SmoothStreaming and our own streaming client that supports the recently adopted HAS standard Dynamic Adaptive Streaming over HTTP (DASH), in an indoor Wireless Local Area Network (WLAN) emulated with a high degree of precision. We compare their performance with the optimal client, and explore the configuration parameter space of the DASH client. Finally, we evaluate the impact of start-up delays and number of available video representations on achievable streaming performance.
Circulating particles during cardiac surgery (2009)

Shed blood is known to be a source of lipid micro-emboli in cardiac surgery. The aim of this study was to characterize the occurrence of these particles at different stages of the operation, and to study their occurrence in the circulation at multiple time-points after the retransfusion of shed blood. Forty-four patients undergoing routine surgery with cardiopulmonary bypass were included. Blood was sampled from the surgical field at different sampling locations during the operation. Shed blood was collected in a transfusion bag and retransfused. After which, blood was sampled from the arterial line of the heart-lung machine. A Coulter counter was used for particle determinion. The mean volume of shed blood collected was 340+/-215 ml. Particles in the size range 10-60 microm were found at varying concentrations, with the highest concentrations being found in blood collected after cannulation and from the pleura. After retransfusion of this blood, a biphasic response was seen in the blood drawn from the efferent line of the heart-lung machine. Particles are found in shed blood at all times during cardiac surgery, and when this blood was retransfused an increase was seen in particle concentration in the heart-lung machine.
Antibodies to CD44 and integrin α<sub>4</sub>, but not L-selectin, prevent central nervous system inflammation and experimental encephalomyelitis by blocking secondary leukocyte recruitment (1999)

The role of various adhesion molecules in lymphocyte homing to the brain and in inflammatory autoimmune disease of the central nervous system (CNS) was examined in mice. Activated T cell lines and clones expressed CD44 and integrin alpha4, but not L-selectin, and entered the CNS independent of their antigen specificity. mAbs directed against CD44 and integrin alpha4 prevented the transfer of experimental autoimmune encephalomyelitis (EAE) by myelin basic protein-specific T cells. T cells preincubated with anti-CD44 or antiintegrin alpha4 were blocked only partially from entering the brain parenchyma. However, both antibodies efficiently prevented CNS inflammation and clinical expression of EAE when injected in vivo. This effect lasted as long as antibodies were administered. Antibodies specific for L-selectin had no effect on homing of encephalitogenic T cells to the brain or development of EAE. Antiintegrin alpha4 and anti-CD44 did not impair the activation and function of encephalitogenic T cells in vitro and did not deplete integrin alpha4- or CD44-positive cells in vivo. These data suggest that, in the absence of leukocyte recruitment, the entry of a reduced number of activated myelin basic protein-reactive T cells in the CNS is not sufficient for the development and expression of EAE. We propose that antibodies to integrin alpha4 and CD44 prevent clinical disease by partially targeting the primary influx of encephalitogenic T cells and by preventing the secondary influx of leukocytes to lesions initiated by the transferred T cells.
Low-threshold long-wave lasers ( lambda =3.0-3.6 mu m) based on III-V alloys (1993)

The authors present data on low-threshold (Jth<100 A cm-2) lasers for the 3-4 mu m range based on InGaAsSb/InAsSbP double heterostructures with compositions close to InAs. The basic features of long-wave lasers were studied in samples with an n-InAs active region. The optimal parameters and the free carrier absorption coefficient in n-InAs were derived from the dependence of the threshold current density on the resonator length, active layer thickness and doping level. To explain the variation of the emission line within 393-410 meV (77 K), three possibilities are considered: band-to-band and band-to-acceptor transitions as well as interface recombination in type II InAs/InAsSbP heterojunctions.
Provable ownership of file in de-duplication cloud storage (2013)

The rapid adoption of cloud services has propelled network data sharing and storage. Client-side deduplication is proposed to minimize bandwidth and space needed to upload and store duplicated data. The existing solutions, however, were recently found to be vulnerable to attacks that enable the attackers to get full access to the entire file stored on the server after learning just a small piece of information about the file, namely its hash value. In this paper, to solve the problem mentioned above, we propose a cryptographically secure and efficient scheme for a client to prove to the server based on actual possession of the entire file instead of only partial information about it. Our scheme utilizes the technique of spot checking in which the client only needs to access small portions of the original file, dynamic coefficients and randomly chosen indices of the original files. Our extensive security analysis shows that the proposed scheme can generate provable ownership of the file (POF) and maintain a high detection probability of the client misbehavior. Both performance analysis and simulation results demonstrate that our proposed scheme is much more efficient than the existing schemes, especially in reducing the burden of the client.
Glasses for Measurement of pH (1949)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGlasses for Measurement of pHG. A. PerleyCite this: Anal. Chem. 1949, 21, 3, 394–401Publication Date (Print):March 15, 1949Publication History Published online1 May 2002Published inissue 15 March 1949https://pubs.acs.org/doi/10.1021/ac60027a013https://doi.org/10.1021/ac60027a013research-articleACS PublicationsRequest reuse permissionsArticle Views166Altmetric-Citations32LEARN 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
Bioconversion of dethiobiotin to biotin by a cell-free system of a<i>bioYB</i>transformant of<i>Bacillus sphaericus</i> (1993)

The bioconversion of dethiobiotin to biotin has been demonstrated by cell-free extracts of a biotin-hyperproducing Bacillus sphaericus mutant transformed with an expression vector for two bio genes: bioB, encoding biotin synthase; and bioY, the function of which remains unknown. The reaction mixture for the biosynthesis of biotin contained yeast extract, l-cysteine and sucrose as well as dethiobiotin. The cell-free extracts prepared from protoplasts of the transformant with a French press at not more than 1000 kg cm−2 showed appreciable biotin synthase activities. An unusually high protein concentration (more than 18 mg ml−1) in the reaction mixture was required for the enzyme activity, while cell-free extracts of less than 10 mg protein ml−1 hardly exhibited detectable activities. The product from dethiobiotin in a reaction mixture was identified as biotin by bioautography with Lactobacillus plantarum.
Regioselective Copper-Catalyzed C-N and C-S Bond Formation Using Amines, Thiols and Halobenzoic Acids (2007)

A regioselective method for highly efficient C-N and C-S bond formation with 2-halobenzoic acids is described. The Cu/Cu(2)O-catalyzed reaction is carried out in 2-ethoxyethanol or ethylene glycol diethyl ether and does not require the use of strong base or other additives. This procedure eliminates the need for acid protection, tolerates a wide range of functional groups and provides aromatic and aliphatic amines and sulfides in 81 to 99% yield.
TISSUE CONCENTRATIONS OF LEVONORGESTREL IN WOMEN USING A LEVONORGESTREL‐RELEASING IUD (1982)

Thirteen women who were scheduled for hysterectomy volunteered for the study. Nine women had a levonorgestrel-releasing intrauterine contraceptive device inserted between 36 and 49 days prior to surgery and four women were on oral levonorgestrel treatment for 7 days prior to surgery. After the surgical removal of the uterus, samples of endometrial, myometrial, fallopian tube and fat tissue were obtained. Methods for measuring tissue concentrations of levonorgestrel were developed and the uptake of levonorgestrel by fat tissue in vitro was studied. The concentrations of levonorgestrel in myometrial, fallopian tube and fat tissue were all of the same order, of between 1 and 5 ng/g of wet weight of tissue, in both the intrauterine device group and the orally treated group. In the endometrium the levonorgestrel concentrations were many-fold higher in the intrauterine device group. The in vitro experiments showed a rapid uptake of levonorgestrel and an unsaturability of the fat tissue by the steroid at the concentrations used. The fat tissue concentrations of levonorgestrel correlated with the plasma concentrations.
Routing of 100 Gb/s words in a packet-switched optical networking demonstration (POND) node (1998)

This paper presents the design and experimental results of an optical packet-switching testbed capable of performing message routing with single wavelength time division multiplexed (TDM) packet bit rates as high as 100 Gb/s. The physical topology of the packet-switched optical networking demonstration (POND) node is based on an eight-node ShuffleNet architecture. The key enabling technologies required to implement the node such as ultrafast packet generation, high-speed packet demultiplexing, and efficient packet routing schemes are described in detail. The routing approach taken is a hybrid implementation in which the packet data is maintained purely in the optical domain from source to destination whereas control information is read from the packet header at each node and converted to the electrical domain for an efficient means of implementing routing control. The technologies developed for the interconnection network presented in this paper can be applied to larger metropolitan and wide area networks as well.
Regulation of alpha4beta2 nicotinic receptor desensitization by calcium and protein kinase C. (1999)

Neuronal nicotinic acetylcholine receptor (nAChR) desensitization is hypothesized to be a trigger for long-term changes in receptor number and function observed after chronic administration of nicotine at levels similar to those found in persons who use tobacco. Factors that regulate desensitization could potentially influence the outcome of long-lasting exposure to nicotine. The roles of Ca2+ and protein kinase C (PKC) on desensitization of alpha4beta2 nAChRs expressed in Xenopus laevis oocytes were investigated. Nicotine-induced (300 nM; 30 min) desensitization of alpha4beta2 receptors in the presence of Ca2+ developed in a biphasic manner with fast and slow exponential time constants of tauf = 1.4 min (65% relative amplitude) and taus = 17 min, respectively. Recovery from desensitization was reasonably well described by a single exponential with taurec = 43 min. Recovery was largely eliminated after replacement of external Ca2+ with Ba2+ and slowed by calphostin C (taurec = 48 min), an inhibitor of PKC. Conversely, the rate of recovery was enhanced by phorbol-12-myristate-13-acetate (taurec = 14 min), a PKC activator, or by cyclosporin A (with taurec = 8 min), a phosphatase inhibitor. alpha4beta2 receptors containing a mutant alpha4 subunit that lacks a consensus PKC phosphorylation site exhibited little recovery from desensitization. Based on a two-desensitized-state cyclical model, it is proposed that after prolonged nicotine treatment, alpha4beta2 nAChRs accumulate in a "deep" desensitized state, from which recovery is very slow. We suggest that PKC-dependent phosphorylation of alpha4 subunits changes the rates governing the transitions from "deep" to "shallow" desensitized conformations and effectively increases the overall rate of recovery from desensitization. Long-lasting dephosphorylation may underlie the "permanent" inactivation of alpha4beta2 receptors observed after chronic nicotine treatment.
Multi-fingered robotic hand planner for object reconfiguration through a rolling contact evolution model (2013)

This paper presents a novel planner for dexterous manipulation with a multi-fingered robotic hand. This planner receives as input an initial grasp of the object and a desired trajectory of the object in task space (position and orientation). The planner computes the movements of the fingers which are required to move the object along this trajectory without breaking contacts. It uses a triangle mesh representation of the surfaces of the fingers and the object and a new contact evolution graph in order to compute all the possible transitions between the contact primitives of their surfaces. This planner have been implemented as a program which communicates with a five-fingered hand in order to test them in real manipulation tasks.
Photocatalytic Reduction in Microreactors (2006)

Abstract Photocatalytic reduction of benzaldehyde and nitrotoluene in microspace was investigated by using a microreactor with immobilized titanium dioxide. Advantages of a photocatalytic microreaction system which has a remarkably large surface-to-volume ratio have been examined.
Resolution in structured illumination microscopy: a probabilistic approach (2008)

Structured illumination can be employed to extend the lateral resolution of wide-field fluorescence microscopy. Since a structured illumination microscopy image is reconstructed from a series of several acquired images, we develop a modified formulation of the imaging response of the microscope and a probabilistic analysis to assess the resolution performance. We use this model to compare the fluorescence imaging performance of structured illumination techniques to confocal microscopy. Specifically, we examine the trade-off between achievable lateral resolution and signal-to-noise ratio when photon shot noise is dominant. We conclude that for a given photon budget, structured illumination invariably achieves better lateral resolution than confocal microscopy.
Phrase discovery for English and Cross-Language Retrieval at TREC-6 (1997)

Berkeley&apos;s experiments in TREC-6 center around phrase discovery in topics and documents. The technique of ranking bigram term pairs by their expected mutual information value was utilized for English phrase discovery as well as Chinese segmentation. This differentiates our phrase-finding method from the mechanistic one of using all bigrams which appear at least 25 times in the collection. Phrase finding presents an interesting interaction with stop words and stop word processing. English phrase discovery proved very important in a dictionary-based English to German cross language run. Our participation in the filtering track was marked with an interesting strictly Boolean retrieval as well as some experimentation with maximum utility thresholds on probabilistically ranked retrieval. 1 Introduction Berkeley&apos;s participation in the TREC conferences has provided a venue for experimental verification of the utility of algorithms for probabilistic document retrieval. Probabilistic document ...
Low nNOS protein in the locus coeruleus in major depression (2004)

Disruptions of glutamatergic and noradrenergic signaling have been postulated to occur in depressive disorders. Glutamate provides excitatory input to the noradrenergic locus coeruleus (LC). In this study, the location of immunoreactivity against neuronal nitric oxide synthase (nNOS), an intracellular mediator of glutamate receptor activation, was examined in the normal human LC, and potential changes in nNOS immunoreactivity that might occur in major depression were evaluated. Tissue containing LC, and a non-limbic, LC projection area (cerebellum) was obtained from 11 to 12 matched pairs of subjects with major depression and control subjects lacking major psychiatric diagnoses. In the LC region, nNOS immunoreactivity was found in large neuromelanin-containing neurons, small neurons lacking neuromelanin, and glial cells. Levels of nNOS immunoreactivity were significantly lower in the LC (- 44%, p < 0.05), but not in the cerebellum, when comparing depressed with control subjects. nNOS levels were positively correlated with brain pH values in depressed, but not control, subjects in both brain regions. Low levels of nNOS in the LC may reflect altered excitatory input to this nucleus in major depression. However, pH appears to effect preservation of nNOS immunoreactivity in subjects with depression. This factor may contribute, in part, to low levels of nNOS in depression.