gebhart/patrepeval huggingface dataset:
Efficient combining techniques for multi-input multi-output multi-user systems employing hybrid automatic repeat request (2011)

The authors consider chase-combining hybrid automatic repeat request (HARQ) schemes over multiple antenna multi-user systems. The focus is on a multiple-access channel, where the users as well as the base-station are equipped with multiple antennas. In such chase-combining HARQ systems, the transmitters (users) re-transmit their codewords when requested by the receiver (base-station). The receiver may choose to enforce blanking, that is, it may choose to request only a subset of the transmitters to re-transmit and the remaining ones to be silent. Moreover, subject to the complexity and latency constraints, the receiver may be able to perform codeword cancellation wherein it can re-encode, re-modulate a subset of decoded codewords and subtract them from the received observations. A candidate combining technique is the conventional chase-combining, which in contrast to the optimal combining requires significantly less memory and processing capability at the receiver but can result in substantial performance degradation. The authors propose efficient combining techniques that cater to all the various scenarios that arise in such multi-codeword systems. The proposed techniques impose similar memory and complexity demands as the conventional combining but yield a significant performance improvement. The issue of limited feedback in multi-codeword multi-antenna chase-combining HARQ systems is also addressed and it can be used to further improve the system throughput.
Poly(aryl ether ketone) block and chain-extended copolymers. 3. Preparation and characterization of poly(ether ketone ketone)/poly(ether sulfone) block copolymers (1993)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(aryl ether ketone) block and chain-extended copolymers. 3. Preparation and characterization of poly(ether ketone ketone)/poly(ether sulfone) block copolymersJ. H. Botkin, R. J. Cotter, M. Matzner, and G. T. KwiatkowskiCite this: Macromolecules 1993, 26, 9, 2372–2376Publication Date (Print):April 1, 1993Publication History Published online1 May 2002Published inissue 1 April 1993https://pubs.acs.org/doi/10.1021/ma00061a033https://doi.org/10.1021/ma00061a033research-articleACS PublicationsRequest reuse permissionsArticle Views240Altmetric-Citations14LEARN 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
Theoretical MRI contrast model for exogenous <i>T</i><sub>2</sub> agents (2007)

The rational development of new generations of MRI contrast agents (CAs) requires a scheme for predicting contrast enhancement. Previous contrast predictions have been based largely on empirical results in specific systems. Here we present a general theoretical model for evaluating the minimum concentration of T2 CA required for satisfactory image contrast. This analytic contrast model is applicable to a wide range of T2-type agents and delivery scenarios, and requires only a few readily evaluated parameters. We demonstrated the model by predicting contrast produced by superparamagnetic ferumoxide and the iron storage protein, ferritin. We then experimentally verified the predictions using suspensions of Feridex(R) and ferritin in phantoms. The model was also used to compare the contrast efficacy of the metal ions in two clinically approved T1- and T2-type CAs. In the Appendix we present a numerical formalism that is useful for relating image contrast and agent concentration when gradient-echo (GRE) T2*-weighted (T2*W) pulse sequences are used.
RESeED: A secure regular‐expression search tool for storage clouds (2017)

Summary Lack of trust has become one of the main concerns of users who tend to utilize one or multiple Cloud providers. Trustworthy Cloud‐based computing and data storage require secure and efficient solutions which allow clients to remotely store and process their data in the Cloud. User‐side encryption is an established method to secure the user data on the Cloud. However, using encryption, we lose processing capabilities, such as searching, over the Cloud data. In this paper, we present RESeED, a tool that provides user‐transparent and Cloud‐agnostic regular‐expression search functionality over encrypted data across multiple Clouds. Upon a client's intent to upload a new document to the Cloud, RESeED analyzes the document's content and updates its data structures accordingly. Then, it encrypts and transfers the document to the Cloud. RESeED provides the regular‐expression search functionality over encrypted data by translating the search queries on‐the‐fly to finite automata and analyzing concise and secure representations of the data before asking the Cloud to download the encrypted documents. RESeED's parallel architecture enables efficient search over large‐scale (and potentially big data scale) data‐sets. We evaluate the performance of RESeED experimentally and demonstrate its scalability and correctness using real‐world data‐sets from arXiv.org and Internet Engineering Task Force (IETF). Our results show that RESeED produces accurate query responses with a reasonable (≃6%) storage overhead. The results also demonstrate that for many search queries, RESeED performs faster in compare with the grep utility that functions on unencrypted data. Copyright © 2017 John Wiley & Sons, Ltd.
Intense terahertz sources for nonlinear interactions (2017)

The present status and the prospects of efficient pulsed terahertz (THz) sources based on optical rectification in lithium niobate and semiconductors, pumped by femtosecond pulses with tilted intensity front, will be discussed. Applications range from nonlinear THz spectroscopy and multispectral imaging to electron and proton acceleration.
A generalized method for synthesizing miniaturized element band-pass frequency selective surfaces (2010)

This paper introduces a generalized methodology to design low profile N <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> -order bandpass frequency selective surfaces. The generalized methodology is based on coupled resonators filter theory. The design procedure is validated by design examples of second and third-order frequency selective surface with band-pass response.
A Physical Layer Security Key Generation Technique for Inter-Vehicular Visible Light Communication (2017)

A physical layer secret key generation scheme exploiting randomness of the road surface and the driving behavior is being proposed. 128bits encryption key is generated based on real world vehicle trajectory big-data to prove the concept.
Model-based optoacoustic imaging using focused detector scanning (2012)

Optoacoustic (photoacoustic) mesoscopic and microscopic imaging is often implemented by linearly scanning a spherically focused ultrasound transducer. In this case, the resolution and sensitivity along the scan direction are limited by diffraction and therefore degrade rapidly for imaging depths away from the focal point. Partial restoration of the lost resolution can be achieved by using data-processing techniques, such as the virtual detector delay-and-sum method. However, these techniques are based on an approximate description of the detector properties, which limits the improvement in image quality they achieve. Herein we propose a reconstruction method based on an exact model of the optoacoustic generation and propagation that incorporates the spatial response of the sensor. The proposed method shows superior imaging performance over previously considered techniques.
Localized Neurotransmitter Release for Use in a Prototype Retinal Interface (2003)

The demonstration of localized chemical stimulation of excitable cells illustrates the potential of this technology for retinal prostheses. Although this is only a proof of concept of neurotransmitter stimulation for a retinal prosthesis, it is a significant first step toward mimicking neurotransmitter release during synaptic transmission.
Energy‐dependent changes in the gonococcal transferrin receptor (1997)

The pathogenic Neisseria spp. are capable of iron utilization from host iron-binding proteins including transferrin and lactoferrin. Transferrin iron utilization is an energy-dependent, receptor-mediated event in which two identified transferrin-binding proteins participate. One of these proteins, TbpA, is homologous to the TonB-dependent family of outer membrane receptors that are required for high-affinity uptake of vitamin B12 and ferric siderophores. The 'TonB box' is a conserved domain near the amino-terminus of these proteins that has been implicated in interaction with TonB. Interaction between a periplasmic domain of TonB and the TonB box allows energy transduction to occur from the cytoplasmic membrane to the energy-dependent receptor in the outer membrane. We created a TonB box mutant of gonococcal TbpA and demonstrated that its binding and protease accessibility characteristics were indistinguishable from those of gonococcal Ton system mutants. The protease exposure of the second transferrin-binding protein, TbpB, was affected by the energization of TbpA, consistent with an interaction between these proteins. TbpB expressed by the de-energized mutants was readily accessible to protease, similar to TbpB expressed in the absence of TbpA. The de-energized mutants exhibited a marked decrease in transferrin diffusion rate, suggesting that receptor energization was necessary for ligand release. We propose a model to explain the observed Ton-dependent changes in the binding parameters and exposures of TbpA and TbpB.
Radioactive gas-containing polymeric capsule. [for dispensing xenon-133 for pulmonary function studies] (1975)

A disposable ventilation study system for dispensing a single patient dosage of gaseous radioisotopes to patients for pulmonary function studies is disclosed. A gas impermeable capsule encloses the gaseous radioisotope and is stored within a radioactivity shielding body of valve means which shears the capsule to dispense the radioisotope to the patient. A breathing bag receives the patient's exhalation of the radioisotope and permits rebreathing of the radioisotope by the patient. 18 claims, 7 drawing figures.
Tuple Pruning Using Bloom Filters for Packet Classification (2010)

Tuple pruning for packet classification provides fast search and a low implementation complexity. The tuple pruning algorithm reduces the search space to a subset of tuples determined by individual field lookups that cause off-chip memory accesses. The authors propose a tuple-pruning algorithm that reduces the search space through Bloom filter queries, which do not require off-chip memory accesses.
083 Intracavernosal Injections of Stromal Derived Factor-1 (SDF1) Prevents Erectile Dysfunction in Nerve Injury Model by Increasing Stem Cell Upregulation in the Penis (2021)

Stromal derived factor-1 (SDF1) is a potent chemokine that attracts stem cell activation and has inherent pro-angiogenic, anti-apoptotic, and neurotrophic effects. We have previously shown that SDF1 penile injections improve erectile function following bilateral cavernous nerve injury (BCNI). SDF1 enhances neurite outgrowth in the major pelvic ganglion (MPG) and associated with upregulation of neurotophin protein expression. The aim of the current study is to further investigate the impact of SDF-1 on penile morphology and stem cell pathways activation using expression assays following BCNI.
Early warnings of the onset of rolling contact fatigue by inspecting the residual stress environment of the railhead (2004)

There is no method available to monitor localised stress levels on in-service railway track, although residual stresses in the rail crown have an important influence on the initiation and evolution of rolling contact fatigue (RCF) cracking. The MAPS technology has the ability to meet this need both in the short term with manual inspections and in the longer term with development of an inspection vehicle. This paper presents an update ( 2 ) of the MAPS measurement of stress levels and distributions in service rail but with a scope limited to specific studies into the early stages of rolling contact fatigue leading to gauge corner cracking. Data presented includes fine-scale stress distributions on rail cross-sections with RCF cracks together with stress distributions and stress depth profiles on rail heads, indicating both the earliest stages of rolling contact fatigue and established RCF cracking. The evidence suggests MAPS measurement data can act as indicators to the future emergence, presence and criticality of the RCF in rails, and thereby enhance maintenance regimes improving the safe service life of the rail network.
A 5600 BPS VSELP speech coder candidate for half-rate GSM (1993)

The bit rate for the speech and channel coder for the half-rate GSM channel is 11400 bps. A 5600 bps VSELF speech coder designed for this application is described. This speech coder is one of two candidates being considered by GSM channel for the half-rate channel. It employs a novel strategy for vector quantization of the reflection coefficients (rj), which combines high coding efficiency, low codebook search complexity, and low storage requirements. A computationally streamlined version of a zero-pole spectral noise weighting function is implemented. An adaptive pitch prefilter and an adaptive spectral postfilter are used to improve the speech coder's performance for both the tandemed and non tandemed cases.
A CMOS-compatible boosted transistor having >2× drive current and low leakage current (2016)

A novel boosted MOS structure with buried n-well current booster providing >2× higher drive current and low off current is experimentally demonstrated on 28 nm bulk silicon technology. TCAD analysis is performed to investigate the boosting mechanism as well as to demonstrate scalability to 7 nm FinFET technology. Constant bias applied to the booster terminal results in a gate voltage controlled body current source intrinsic vertical BJT that only turns on at high gate voltage. The body current then amplifies lateral BJT current. The inherent vertical and lateral BJTs are automatically turned off at low gate voltage, maintaining low off-state current.
AAEE minimonograph #29: Automatic quantitative electromyography (1988)

The present status of different computerized methods of automatic quantitative electromyography are reviewed. Interference pattern methods-turns analysis, spectral analysis-are efficient, but the results usually cannot be directly related to the physiological properties of the motor units. Integration analysis does not currently have a major role in diagnostic electromyography. Traditional measurement of single motor unit action potentials during weak contraction can be facilitated and made more objective with computer assistance, but only the lowest-threshold motor units in the muscle are amenable to study. A new class of methodologies under development permit the decomposition of interference patterns into their constituent motor unit action potentials for measurement of configurational and behavioral properties. Patient data from these various methods can be statistically compared with normative data bases available on-line in computerized electromyographs. Both quantitative and quantitative electromyography have applications in the neuromuscular electrodiagnostic examination.
Effects of 2,4-diaminoquinazoline derivatives on SMN expression and phenotype in a mouse model for spinal muscular atrophy (2009)

Proximal spinal muscular atrophy (SMA), one of the most common genetic causes of infant death, results from the selective loss of motor neurons in the spinal cord. SMA is a consequence of low levels of survival motor neuron (SMN) protein. In humans, the SMN gene is duplicated; SMA results from the loss of SMN1 but SMN2 remains intact. SMA severity is related to the copy number of SMN2. Compounds which increase the expression of SMN2 could, therefore, be potential therapeutics for SMA. Ultrahigh-throughput screening recently identified substituted quinazolines as potent SMN2 inducers. A series of C5-quinazoline derivatives were tested for their ability to increase SMN expression in vivo. Oral administration of three compounds (D152344, D153249 and D156844) to neonatal mice resulted in a dose-dependent increase in Smn promoter activity in the central nervous system. We then examined the effect of these compounds on the progression of disease in SMN lacking exon 7 (SMNDelta7) SMA mice. Oral administration of D156844 significantly increased the mean lifespan of SMNDelta7 SMA mice by approximately 21-30% when given prior to motor neuron loss. In summary, the C5-quinazoline derivative D156844 increases SMN expression in neonatal mouse neural tissues, delays motor neuron loss at PND11 and ameliorates the motor phenotype of SMNDelta7 SMA mice.
Novel Silicon-Based Continuous Inkjet Printhead Employing Asymmetric Heating Deflection Means (2001)

In this paper, a novel continuous inkjet technology will be presented. The technology presented uses a pulsed application of asymmetric heat to a pressurized stream of ink emitted from a nozzle both to break up the stream into regularly sized printing drops and to deflect the drops onto a receiver while allowing the non-printing drops to be captured. Depending on the nozzle geometry, fluid properties and applied pressure arrays of small drop volumes (3 picoliters) can be jetted and deflected at high velocity (10 m/s). The printhead, fabricated in silicon, is produced by MEMS processing techniques that are CMOS compatible, allowing for direct integration of circuitry. The basic device geometry and operation will be described including some experimental results.
Schedulability and Scheduling Analysis of Dual-Arm Cluster Tools with Wafer Revisiting and Residency Time Constraints Based on a Novel Schedule (2014)

Some wafer fabrication processes require a wafer to visit some processing modules in a cluster tool multiple times, leading to a wafer revisiting process. They may pose wafer residency time constraints, i.e., a wafer can stay in a module for a limited time after it is processed. Although techniques exist for scheduling cluster tools with either wafer residency time constraints or wafer revisiting, it is much more challenging to schedule tools with both of them. Considering that atomic layer deposition is a typical wafer revisiting process, this paper intends to schedule a dual-arm cluster tool dealing with it. Based on the analysis of such a tool's properties, a novel scheduling strategy called modified 1-wafer cyclic scheduling is derived. With this strategy, necessary and sufficient schedulability conditions are presented. If schedulable, highly efficient scheduling algorithms are developed to obtain a feasible and optimal schedule together with a way to implement the obtained one. Illustrative examples are given to show the application of the proposed approach.
Ten-minute analysis of drugs and metabolites in saliva by surface-enhanced Raman spectroscopy (2005)

Rapid analysis of drugs in emergency room overdose patients is critical to selecting appropriate medical care. Saliva analysis has long been considered an attractive alternative to blood plasma analysis for this application. However, current clinical laboratory analysis methods involve extensive sample extraction followed by gas chromatography and mass spectrometry, and typically require as much as one hour to perform. In an effort to overcome this limitation we have been investigating metal-doped sol-gels to both separate drugs and their metabolites from saliva and generate surface-enhanced Raman spectra. We have incorporated the sol-gel in a disposable lab-on-a-chip format, and generally no more than a drop of sample is required. The detailed molecular vibrational information allows chemical identification, while the increase in Raman scattering by six orders of magnitude or more allows detection of microg/mL concentrations. Measurements of cocaine, its metabolite benzoylecgonine, and several barbiturates are presented.
A Predictive Estimation Approach to Model Independent Visual Servoing (1998)

Target tracking by model independent visual servo control is achieved by augmenting quasi-Newton trust region control with target prediction. Prediction schemes are shown to be effective despite imprecise knowledge of kinematic and camera models. A rank-one Broyden update law provides on-line estimation of the Jacobian, and a control law is provided in the form of a quasi-Newton trust region approach. Robot control is independent of robot and camera configurations, and is able to reach both static and moving targets.
Spatial analysis of the three dimensional components of a magnetocardiogram (2005)

In this study, the spatial distribution of a cardiomagnetic vector field featuring multiple measurement planes obtained by separated distance was analyzed. Each of the vector components comprising a magnetocardiogram (MCG) and normal and tangential components are measured using an individual MCG measuring system respectively. Results on the overlapping time-wave forms of vector MCG in the case of a normal adult subject (40 years old) was presented. Where a localized single current source exists, each time-wave form must theoretically have a similar figure. However, the peak height ratios (Q, R, S, T) are different for each time-wave forms. On the other hand, the vector MCG time-wave forms of a 5 year old child showed a shape almost similar to that of adults, thought to be due to the relatively small size of the infant heart. However, it was observed that the vector fetal MCG was hardly influenced by a change by the fetal physique. For the next analysis of the vector MCG, changes in the magnetic field strength in distance z from the chest wall were measured. The magnetic field strength decreases according to the distance from the subject, although attenuation curves are different on each occasion This characteristic is the reflected difference in the current source depth in the heart. Here, another method was developed for current estimation using the attenuation factor of distance, which was obtained by calculating the change in the magnetic field strength against the distance r with 1/r/sup /spl alpha//. Current sources were estimated using the attenuation factor. This study showed that vector MCG measurement is helpful in the analysis of the current distribution.