gebhart/patrepeval huggingface dataset:
Application Of Image Processing To Human Motion Analysis (1989)

A novel method is presented for the determination of position and orientation of interconnected human body segments relative to a spatial coordinate system. The development of this new method was prompted by the inadequacy of the techniques currently in use for recorded images. In these techniques, markers are fixed to certain points on the skin of the subject. However, due to skin movement relative to the skeleton and various other factors, the configurational coordinates derived from digitized marker positions may be grossly erroneous with disastrous consequences for the subsequent motion analysis. The new method is based on body-segment shape recognition in the video-image domain. During the recording session, the subject carries special, tight-fitting clothing which permits the unambiguous recognition of segmental shapes and boundaries from the recorded video images. The recognition is performed by means of an edge detection algorithm followed by the computation of the positions and orientations relative to the spatial axes system of all segments of the body model. The new method is implemented on an advanced, special high speed graphic system (Impuls, System 2400) based on transputer chips. The parallel processing capability of this system permits the simultaneous computation of the configurational characteristics for all segments visible in the image. After processing one complete image frame, the video digitizer is instructed to automatically proceed to the next frame, thereby enabling the user to automatically evaluate large amounts of successive frames.
Antihypertensive Effect of Angiotensin-Converting Enzyme Inhibitory Peptide Obtained from Hen Ovotransferrin (2006)

Angiotensin I-converting enzyme (ACE) inhibitory peptide was isolated from the hen ovotransferrin hydrolysate using chymotryptic hydrolysis by two steps of reverse-phase high-performance liquid chromatography. The amino sequence of this novel peptide was identified as Lys-Val-Arg-Glu-Gly-Thr-Thr-Tyr that inhibited ACE activity in vitro in a concentration-dependent manner with an effective concentration (IC50) of 102.8 μM. Also, this inhibition was identified as noncompetitive using the Lineweaver-Burk plot. Moreover, the antihypertensive action of this novel peptide was investigated by an intravenous injection into spontaneously hypertensive rats (SHR). A dose-dependent reduction of systolic blood pressure by this peptide was observed after 40 min of treatment and it decreased the blood pressure markedly at the maximal dose (1 nmol/mL/kg). The maximal blood pressure lowering activity of this peptide was calculated as 163% of captopril (10 pmol/mL/kg) that was used as positive control. In conclusion, the obtained data suggests that Lys-Val-Arg-Glu-Gly-Thr-Thr-Tyr has an ability to inhibit ACE activity and decrease the systolic blood pressure in hypertensive animals.
The AAPM/RSNA physics tutorial for residents. X-ray interactions. (1998)

The diagnostic information in a radiograph or fluoroscopic image is largely the result of the quantity of x rays that are not removed from the incident x-ray beam. The information content of the image is delivered by the percentage of noninteracting photons that are successfully recorded. There are four major x-ray interactions: Rayleigh (coherent) scattering. Compton scattering, photoelectric absorption, and pair production. The degree of attenuation and the predominant mechanisms involved in the interactions are influenced by the x-ray energy and tissue composition. In the diagnostic energy range, photoelectric absorption and Compton scattering are the predominant modes of attenuation. One of the challenges in diagnostic imaging is to optimize image acquisition by controlling x-ray attenuation to obtain the appropriate contrast between the tissues while minimizing patient dose and scattered radiation in the image. Imaging techniques such as use of contrast material and dedicated mammography equipment exploit the differences in these types of x-ray interactions to improve the quality and diagnostic utility of the examination. Rayleigh scattering and pair production are presented but do not occur to any significant degree in diagnostic radiography.
MEASURING IMPACTS OF WATER RESOURCE DEVELOPMENTS ON THE HUMAN ENVIRONMENT<sup>1</sup> (1974)

SUMMARY The parameters and the measurement procedures described in this paper are seen as being part of the first stage in development of the human environment assessment process. Additional parameters need to be identified, and methods of measuring impacts reflected by the parameters must be developed and refined. Considerations of the human environment and those elements of the natural environment that are of importance to people must be included as an integral part of the environmental impact assessment process. Therefore, there is a need for continuing to identify parameters of the human environment and to develop methods of measuring impacts so that these considerations will become a well‐integrated part of the environmental impact assessment process.
Microbial transformation and degradation of toxic organic chemicals (1995)

The book examines the role of microbes, from theoretical, field and applied perspectives, in the degradation of toxic organic chemicals. Beginning with a coverage of the fundamentals of microbial ecology, the next section has four chapters on practical applications of microorganisms in cleanup and bioremediation, in the laboratory and in the field, including `Field treatment of coal tar-contaminated soil based on results of laboratory treatability studies`. Other chapters cover treatment of chemical process wastewater, chlorophenol waters, chlorinated organics, and BTEX and petroleum fuel products; Three chapters follow on future trends, entitled degradative genes in the environment, risk assessment for toxic chemicals in the environment, and hazardous chemicals and biotechnology: past successes and future promise.
The β-Agonist Lung Injury Trial (BALTI) (2005)

TEST 02 - Elsevier's Scopus, the largest abstract and citation database of peer-reviewed literature. Search and access research from the science, technology, medicine, social sciences and arts and humanities fields.
Effect of Biosynthesized ZnO Nanoparticles on Multi-Drug Resistant Pseudomonas Aeruginosa (2020)

Synthesis of nanoparticles using the plants has several advantages over other methods due to the environmentally friendly nature of plants. Besides being environmentally friendly, the synthesis of nanoparticles using plants or parts of the plants is also cost effective. The present study focuses on the biosynthesis of zinc oxide nanoparticles (ZnO NPs) using the seed extract of <i>Butea monsoperma</i> and their effect on to the quorum-mediated virulence factors of multidrug-resistant clinical isolates of <i>Pseudomonas aeruginosa</i> at sub minimum inhibitory concentration (MIC). The synthesized ZnO NPs were characterized by different techniques, such as Fourier transform infra-red spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), and transmission electron microscopy (TEM). The average size of the nanoparticles was 25 nm as analyzed by TEM. ZnO NPs at sub MIC decreased the production of virulence factors such as pyocyanin, protease and hemolysin for <i>P. aeruginosa</i> (<i>p</i> ≤ 0.05). The interaction of NPs with the <i>P. aeruginosa</i> cells on increasing concentration of NPs at sub MIC levels showed greater accumulation of nanoparticles inside the cells as analyzed by TEM.
WATER CONTENT OF FRESH CONCRETE MEASURED BY NEUTRON RADIATION (1972)

EXPERIMENTS WERE MADE TO STUDY THE USE OF NEUTRON RADIATION TO MEASURE THE WATER CONTENT OF FRESH CONCRETE. HYDROGEN IN THE WATER CAUSES NEUTRONS TO BE REDUCED IN ENERGY AND BACKSCATTERED TO A DETECTOR THAT COUNTS LOW- ENERGY NEUTRON ONLY. THUS, WITH PROPER CONTROL, THE NEUTRON COUNT IS PROPORTIONAL TO WATER CONTENT IN A STANDARDIZED SAMPLE OF CONCRETE. STANDARD 1/2-FT3 CONCRETE MEASURES WERE MODIFIED TO RECEIVE THE NUCLEAR PROBE (A TUBE CARRYING SOURCE AND DETECTOR) AND CONTAINED THE CONCRETE SAMPLE. THE APPARATUS WAS CALIBRATED WITH LABORATORY-MADE CONCRETES HAVING A WIDE RANGE OF WATER CONTENTS. WATER CONTENT OF CONCRETE SAMPLES TAKEN FROM TRUCK-MIXED BATCHES MEASURED BETWEEN 0.92 AND 1.11 TIMES THE AVERAGE BATCHED UNIT QUANTITY OF WATER. READINGS TAKEN WITH THE PROBE LOCATED IN DIFFERENT POSITIONS RELATIVE TO POLYETHYLENE MODELS OF THE SAMPLE SHOWED A LARGE INFLUENCE OF THE SPATIAL RELATION OF SOURCE, DETECTOR, AND SAMPLE. THESE TESTS DEMONSTRATED THE APPLICABILITY OF THE NUCLEAR METHOD FOR MEASURING WATER CONTENT OF FRESH CONCRETE BUT INDICATE THAT REFINEMENTS ARE NEEDED TO INCREASE THE PRECISION OBTAINABLE.
Fetal Pulse Oximetry (2011)

The original expectation of fetal pulse oximetry (FPO) for the field of obstetrics was predicated on the tremendous positive impact pulse oximetry had upon the fields of anesthesiology, critical care medicine, and many other disciplines of medicine. With the general acceptance that many, if not most, concerning fetal heart rate patterns are not associated with significant fetal hypoxemia and acidemia, the additional physiologic information FPO offers (ie, actual arterial blood oxygenation) was believed and hoped by many to be the reassurance that would allow safe avoidance of unnecessary interventions such as cesarean delivery. To date, FPO has not met that expectation, not because of its inability to measure fetal arterial oxygen saturation, but because of its inability to do so with a reduction in overall cesarean deliveries.
Effects of Platinum Doping on the Photoelectrochemical Properties of Fe2O3 Electrodes (2013)

The effects of platinum (Pt) doping on the structure and photoelectrochemical properties of Fe2O3 electrodes have been investigated. The Pt-doped Fe2O3 electrodes were prepared by sol-gel and spin coated on fluorine-tin-oxide coated glass substrate. Influences of dopant concentration on material properties and photoelectrochemical characteristics were examined. Results of XRD and XPS showed that _-Fe2O3 can be obtained using 500 oC annealing in air. The band gaps of the samples obtained from reflectance and transmittance spectra measurement were found to vary from 1.98 to 2.03 eV. The flat band potentials of the samples were obtained from the Mott-Schottky analysis and found to be in the range of -0.135 V to -0.6 V. The maximum photocurrent density of undoped and 0.1 at.% Pt-doped Fe2O3 electrodes was 0.5 mA/cm2 and 0.7 mA/cm2 under a 300 W Xe lamp system, respectively. The good photoelectrochemical results of the Pt-doped Fe2O3 electrode warrant further investigation for broader applications in the future.
Design and characterization of complementary Gaussian reflectivity mirrors (1985)

A mirror with a Gaussian reflectivity profile and a complementary transmission has been designed. This nonabsorptive smooth mirror is based on radially varying the thickness of a high-refractive-index dielectric deposited on a transparent substrate. Prototypes have been fabricated for use around 10 μm. The reflection and transmission profiles of one of them have been measured together with the modifications of the reflected and transmitted wave fronts.
Glioblastoma chemotherapy adjunct via potent serotonin receptor‐7 inhibition using currently marketed high‐affinity antipsychotic medicines (2010)

Glioblastoma treatment as now constituted offers increased survival measured in months over untreated patients. Because glioblastomas are active in synthesizing a bewildering variety of growth factors, a systematic approach to inhibiting these is being undertaken as treatment adjunct. The serotonin 7 receptor is commonly overexpressed in glioblastoma. Research documentation showing agonists at serotonin receptor 7 cause increased extracellular regulated kinase 1/2 activation, increased interleukin-6 synthesis, increased signal transducer and activator of transcription-3 activation, increased resistance to apoptosis and other growth enhancing changes in glioblastoma is reviewed in this paper. Because three drugs in wide use to treat thought disorders - paliperidone, pimozide and risperidone - are also potent and well-tolerated inhibitors at serotonin receptor 7, these drugs should be studied for growth factor deprivation in an adjunctive role in glioblastoma treatment.
GPS software attacks (2012)

Since its creation, the Global Positioning System (GPS) has grown from a limited purpose positioning system to a ubiquitous trusted source for positioning, navigation, and timing data. To date, researchers have essentially taken a signal processing approach to GPS security and shown that GPS is vulnerable to jamming and spoofing.
A linear induction motor control system for magnetically levitated carrier system (1989)

An electromagnetic suspension system has been developed that cuts off electric power-collecting devices from a magnetically levitated vehicle. This system makes it possible to transport materials with no mechanical contact at all between the vehicle and ground facilities. A control system for linear induction motors used in the magnetically levitated carrier system is described. The system was developed to transport materials in an environment which must be kept free from even microscopic dust motes and trivial noise. The linear induction motor control method used for positioning a vehicle at the station is described along with several kinds of switches without any mechanical motion in the ground facilities. A supervisory control system for the magnetically levitated carrier system is also discussed.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
SRB-2: a promiscuous rainbow aptamer for live-cell RNA imaging (2018)

The SRB-2 aptamer originally selected against sulforhodamine B is shown here to promiscuously bind to various dyes with different colors. Binding of SRB-2 to these dyes results in either fluorescence increase or decrease, making them attractive for fluorescence microscopy and biological assays. By systematically varying fluorophore structural elements and measuring dissociation constants, the principles of fluorophore recognition by SRB-2 were analyzed. The obtained structure-activity relationships allowed us to rationally design a novel, bright, orange fluorescent turn-on probe (TMR-DN) with low background fluorescence, enabling no-wash live-cell RNA imaging. This new probe improved the signal-to-background ratio of fluorescence images by one order of magnitude over best previously known probe for this aptamer. The utility of TMR-DN is demonstrated by imaging ribosomal and messenger RNAs, allowing the observation of distinct localization patterns in bacteria and mammalian cells. The SRB-2 / TMR-DN system is found to be orthogonal to the Spinach/DFHBI and MG/Malachite green aptamer/dye systems.
Laser-enhanced plasma etching of silicon (1985)

Laser-enhanced etching of Si in a CF4/O2 plasma is described. Both p-type and n-type Si were investigated for different dopant concentrations, at laser intensities from 0–2 W. Etch–rate enhancement, due to thermal and nonthermal effects, was observed.
RNA sequence requirements for NasR-mediated, nitrate-responsive transcription antitermination of the Klebsiella oxytoca M5al nasF operon leader (1999)

In Klebsiella oxytoca, enzymes required for nitrate assimilation are encoded by the nasFEDCBA operon. Nitrate and nitrite induction of nasF operon expression is determined by a transcriptional antitermination mechanism, in which the nasR gene product responds to nitrate or nitrite and overcomes transcription termination at the factor-independent terminator site located in the nasF upstream leader region. Previous studies led to the hypothesis that the NasR protein mediates transcription antitermination through interaction with nasF leader RNA. Here, we report a DNA sequence comparison that reveals conserved 1:2 and 3:4 RNA secondary structures in the nasF leader RNAs from two Klebsiella species. Additionally, we found that specific binding of the NasR protein to nasF leader RNA was stimulated by nitrate and nitrite. We combined mutational analysis, in vivo and in vitro antitermination assays, and an RNA electrophoretic mobility shift assay to define regions in the nasF leader that are essential for antitermination and for NasR-RNA interaction. Formation of the 1:2 stem structure and the specific sequence of the 1:2 hexanucleotide loop were required for both nitrate induction and for NasR-RNA interaction. Mutations in the 1:2 stem-loop region that abolished nitrate induction also interfered with NasR-leader RNA interaction. Finally, nucleotide alterations or additions in the linker region between the 1:2 and 3:4 stem-loops were deleterious to nasF operon induction but not to NasR-leader RNA interaction. We hypothesize that NasR protein recognizes the 1:2 stem-loop structure in the nasF leader RNA to mediate transcription antitermination in response to nitrate or nitrite.
Mechanism of gaseous siloxane reaction with silica. II (1968)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of gaseous siloxane reaction with silica. IIWilliam HertlCite this: J. Phys. Chem. 1968, 72, 12, 3993–3997Publication Date (Print):November 1, 1968Publication History Published online1 May 2002Published inissue 1 November 1968https://pubs.acs.org/doi/10.1021/j100858a009https://doi.org/10.1021/j100858a009research-articleACS PublicationsRequest reuse permissionsArticle Views391Altmetric-Citations45LEARN 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 options Get e-Alerts
A Single-Amino-Acid Substitution in the NS1 Protein Changes the Pathogenicity of H5N1 Avian Influenza Viruses in Mice (2007)

In this study, we explored the molecular basis determining the virulence of H5N1 avian influenza viruses in mammalian hosts by comparing two viruses, A/Duck/Guangxi/12/03 (DK/12) and A/Duck/Guangxi/27/03 (DK/27), which are genetically similar but differ in their pathogenicities in mice. To assess the genetic basis for this difference in virulence, we used reverse genetics to generate a series of reassortants and mutants of these two viruses. We found that a single-amino-acid substitution of serine for proline at position 42 (P42S) in the NS1 protein dramatically increased the virulence of the DK/12 virus in mice, whereas the substitution of proline for serine at the same position (S42P) completely attenuated the DK/27 virus. We further demonstrated that the amino acid S42 of NS1 is critical for the H5N1 influenza virus to antagonize host cell interferon induction and for the NS1 protein to prevent the double-stranded RNA-mediated activation of the NF-kappaB pathway and the IRF-3 pathway. Our results indicate that the NS1 protein is critical for the pathogenicity of H5N1 influenza viruses in mammalian hosts and that the amino acid S42 of NS1 plays a key role in undermining the antiviral immune response of the host cell.
Demonstration of Dual A-V Nodal Pathways in Patients with Paroxysmal Supraventricular Tachycardia (1973)

Electrophysiological evidence suggestive of dual atrioventricular (A-V) nodal pathways is presented in two patients with normal P-R interval and reentrant paroxysmal supraventricular tachycardia (PSVT). His bundle recordings and atrial stimulation were used to obtain this electrophysiological evidence. Refractory periods were measured with the atrial extra-stimulus technique. Plotting of H 1 -H 2 responses against A 1 -A 2 coupling intervals revealed that as A 1 -A 2 decreased, H 1 -H 2 decreased appropriately. At a critical A 1 -A 2 , a sudden marked increase in H 1 -H 2 occurred, suggesting failure of fast pathway, (defining the fast pathway effective refractory period ERP). Further shortening of A 1 -A 2 defined a second H 1 -H 2 curve. The longest A 1 -A 2 with no H 2 response was defined as the slow pathway ERP. Echo zones coincided with A 1 -A 2 intervals equal to or less than the fast pathway ERP. These results provide the first electrophysiological demonstration of dual A-V nodal pathways in patients with normal P-R interval and PSVT, as manifest by dual A-V nodal conduction times and refractory periods. Antegrade failure of the fast pathway with subsequent availability for retrograde conduction could allow A-V nodal reentry. These findings provide a basis for reentrance in some patients with reentrant PSVT.
Automated In-Process Cure Monitoring of Composite Laminates Using a Guided Wave-Based System With High-Temperature Piezoelectric Transducers (2018)

An in-process cure monitoring technique based on "guided wave" concept for carbon fiber reinforced polymer (CFRP) composites was developed. Key parameters including physical properties (viscosity and degree of cure) and state transitions (gelation and vitrification) during the cure cycle were clearly identified experimentally from the amplitude and group velocity of guided waves, validated via the semi-empirical cure process modeling software RAVEN. Using the newly developed cure monitoring system, an array of high-temperature piezoelectric transducers acting as an actuator and sensors were employed to excite and sense guided wave signals, in terms of voltage, through unidirectional composite panels fabricated from Hexcel® IM7/8552 prepreg during cure in an oven. Average normalized peak voltage, which pertains to the wave amplitude, was selected as a metric to describe the guided waves phenomena throughout the entire cure cycle. During the transition from rubbery to glassy state, the group velocity of the guided waves was investigated for connection with degree of cure, T<sub>g</sub>, and mechanical properties. This work demonstrated the feasibility of in-process cure monitoring and continued progress toward a closed-loop process control to maximize composite part quality and consistency.
The influence of the stiffness of GelMA substrate on the outgrowth of PC12 cells (2019)

Recent studies have shown the importance of cell-substrate interaction on neurone outgrowth, where the Young's modulus of the matrix plays a crucial role on the neurite length, migration, proliferation, and morphology of neurones. In the present study, PC12 cells were selected as the representative neurone to be cultured on hydrogel substrates with different stiffness to explore the effect of substrate stiffness on the neurone outgrowth. By adjusting the concentration of gelatin methacryloyl (GelMA), the hydrogel substrates with the variation of stiffnesses (indicated by Young's modulus) from approximately 3-180 KPa were prepared. It is found that the stiffness of GelMA substrates influences neuronal outgrowth, including cell viability, adhesion, spreading, and average neurite length. Our results show a critical range of substrate's Young's modulus that support PC12 outgrowth, and modulate the cell characteristics and morphology. The present study provides an insight into the relationship between the stiffness of GelMA hydrogel substrates and PC12 cell outgrowth, and helps the design and optimization of tissue engineering scaffolds for nerve regeneration.