gebhart/patrepeval huggingface dataset:
High-precision multi-view camera calibration using a rotating stage (2016)

The main challenge in multi-view camera calibration is precise pose estimation of cameras, especially when their fields of view have very little overlap. This work proposes a very accurate multi-view camera calibration method that does not require cameras to share theirs fields of view. A rotating stage is used to move the calibration target along a known trajectory, consisting of pure rotation, through the field of view of all cameras. Calibration parameters (camera poses and axis of rotation) are then extracted from a novel highly constrained optimization procedure. Experiments with a 3D scanning system demonstrate that the proposed method can achieve a high degree of accuracy compared to the conventional 2D plane based calibration.
Phase Delay Measurement and Calibration in Built-In Analog Functional Testing (2007)

A built-in self-test (BIST) approach has been proposed for functionality measurements of analog circuitry in mixed-signal systems. The BIST circuitry consists of a direct digital synthesizer (DDS) based test pattern generator (TPG) and multiplier/accumulator (MAC) based output response analyzer (ORA). In this paper we investigate and discuss the effects of phase delay on analog functionality measurements in mixed-signal systems when using MAC-based ORAs. We show that phase delay has a critical impact on measurement results and that the MAC-based ORA is an effective method for measuring phase delay.
Analysis of Polyurethane Foaming Flow (2002)

Polyurethane foam has many excellent features such as thermal insulation and shock and sound absorption, and is used for refrigerator parts, car parts and many other products. Simulating the precise behavior of polyurethane foaming is very effective for reducing the development period and production costs. Through experiments and foaming flow simulations, in this study it was found that for a given foaming condition, the maximum flow length of polyurethane foaming increases in proportion to the foaming weight, while the specific volume change with time is constant for all foaming weights. A foaming flow simulation was then developed by applying density and viscosity formulated as functions of elapsed polyurethane foaming time to a 3D flow simulation program. This foaming flow simulation allows precise determination of the foaming flow length, and the tendency and maximum pressure of foaming flow.
Development and use of a partial <b> <i>Mycobacterium avium</i> </b> subspecies <b> <i>paratuberculosis</i> </b> protein array (2008)

As an initial step toward systematically characterizing all antigenic proteins produced by a significant veterinary pathogen, 43 recombinant Mycobacterium avium subspecies paratuberculosis (M. paratuberculosis) expression clones were constructed, cataloged, and stored. NC filters were spotted with purified proteins from each clone along with a whole cell lysate of M. paratuberculosis. Spots on the resulting dot array consisted of hypothetical proteins (13), metabolic proteins (3), cell envelope proteins (7), known antigens (4), and unique proteins with no similarity in public sequence databases (16). Dot blot arrays were used to profile antibody responses in a rabbit and mouse exposed to M. paratuberculosis as well as in cattle showing clinical signs of Johne's disease. The M. paratuberculosis heat shock protein DnaK, encoded by ORF MAP3840 and a membrane protein (MAP2121c), were identified as the most strongly immunoreactive in both the mouse and rabbit hosts, respectively. MAP3155c, which encodes a hypothetical protein, was most strongly immunoreactive in sera from Johne's disease cattle. This study has enabled direct comparisons of antibody reactivity for an entire panel of over 40 proteins and has laid the foundation for future high throughput production and arraying of M. paratuberculosis surface proteins for immune profiling experiments in cattle.
Solvent consumption in non-catalytic alcohol solvolysis of biorefinery lignin (2017)

Identified solvent reaction routes in alcohol solvolysis of lignin where lignin-oil incorporation through covalent bonding is the only desired reaction.
Transactional Array Reconciliation Tomography for Precision Indoor Location (2014)

A novel system is described for precision indoor location and tracking of personnel inside a building using RF signals exchanged with reference units deployed outside the building without benefit of infrastructure or site survey. Localization in high multipath without multilateration by fusion of unidirectional signals using singular array reconciliation tomography is reviewed. The bidirectional signal fusion approach is introduced with transactional array reconciliation tomography. Underlying theory is developed, and performance evaluated with simulated and experimental data.
A task level metric for measuring web search satisfaction and its application on improving relevance estimation (2011)

Understanding the behavior of satisfied and unsatisfied Web search users is very important for improving users search experience. Collecting labeled data that characterizes search behavior is a very challenging problem. Most of the previous work used a limited amount of data collected in lab studies or annotated by judges lacking information about the actual intent. In this work, we performed a large scale user study where we collected explicit judgments of user satisfaction with the entire search task. Results were analyzed using sequence models that incorporate user behavior to predict whether the user ended up being satisfied with a search or not. We test our metric on millions of queries collected from real Web search traffic and show empirically that user behavior models trained using explicit judgments of user satisfaction outperform several other search quality metrics. The proposed model can also be used to optimize different search engine components. We propose a method that uses task level success prediction to provide a better interpretation of clickthrough data. Clickthough data has been widely used to improve relevance estimation. We use our user satisfaction model to distinguish between clicks that lead to satisfaction and clicks that do not. We show that adding new features derived from this metric allowed us to improve the estimation of document relevance.
Type II Toxoplasma gondii<i>KU80</i>Knockout Strains Enable Functional Analysis of Genes Required for Cyst Development and Latent Infection (2011)

ABSTRACT Type II Toxoplasma gondii KU80 knockouts (Δ ku80 ) deficient in nonhomologous end joining were developed to delete the dominant pathway mediating random integration of targeting episomes. Gene targeting frequency in the type II Δ ku80 Δ hxgprt strain measured at the orotate ( OPRT ) and the uracil ( UPRT ) phosphoribosyltransferase loci was highly efficient. To assess the potential of the type II Δ ku80 Δ hxgprt strain to examine gene function affecting cyst biology and latent stages of infection, we targeted the deletion of four parasite antigen genes ( GRA4 , GRA6 , ROP7 , and tgd057 ) that encode characterized CD8 + T cell epitopes that elicit corresponding antigen-specific CD8 + T cell populations associated with control of infection. Cyst development in these type II mutant strains was not found to be strictly dependent on antigen-specific CD8 + T cell host responses. In contrast, a significant biological role was revealed for the dense granule proteins GRA4 and GRA6 in cyst development since brain tissue cyst burdens were drastically reduced specifically in mutant strains with GRA4 and/or GRA6 deleted. Complementation of the Δ gra4 and Δ gra6 mutant strains using a functional allele of the deleted GRA coding region placed under the control of the endogenous UPRT locus was found to significantly restore brain cyst burdens. These results reveal that GRA proteins play a functional role in establishing cyst burdens and latent infection. Collectively, our results suggest that a type II Δ ku80 Δ hxgprt genetic background enables a higher-throughput functional analysis of the parasite genome to reveal fundamental aspects of parasite biology controlling virulence, pathogenesis, and transmission.
Evolution of Thermal Barrier Coatings for Land Based Gas Turbines at MHI (2014)

Abstract This paper describes the development and verification of a thermal barrier coating (TBC) for use in class 1600 °C turbines. It explains how ceramic materials with different crystal structures were selected for the topcoat and how they were screened based on phase transformations. It discusses the method used determine a bond coat composition with high oxidation resistance and good ductility. It describes the TBC deposition process, the tuning of spray parameters, and the optimization of coating properties. It discusses the tests used to evaluate the topcoat, bond coat, and thermally grown oxide (TGO) layer and presents the results of 10,000 h of field testing in a power plant.
The Feasibility of Using an INS for Control System Feedbacks (1998)

<div class="htmlview paragraph">It has been suggested that the conventional air data probes used on modern high performance aircraft can be eliminated by exploiting the capabilities of the Inertial Navigation System (INS) and obtaining analytic estimates of angle-of-attack (α), sideslip angle (β), and possibly of dynamic pressure (q). The reasons for wanting to eliminate the probes are that they are vulnerable to ground handling damage, bird strikes, icing, and hostile action in the case of combat aircraft. To determine the feasibility of this approach, three methods for obtaining α and β estimates from INS information were programmed into a nonlinear simulation of a relaxed stability aircraft which requires a high level of artificial stability augmentation through its flight control system. It was found that none of the three methods provided satisfactory stabilizing feedbacks to the control system when the subject aircraft was disturbed by severe atmospheric turbulence. This was due to the inability of the INS to determine the airframe orientation relative to the motion of the atmosphere. Simulation results for each of the three methods were compared with the results obtained when conventional probes were used to obtain direct measurements of α and β. An alternate method for determining α and β analytically that would be satisfactory for use in turbulence is presented.</div>
Outer Membrane Proteins and Lipopolysaccharides of Nontypeable Haemophilus influenzae (1992)

Several outer membrane proteins of nontypeable Haemophilus influenzae are potential vaccine candidates: P2 and P6 elicit antibodies that are bactericidal and protective in experimental models of infection. Other proteins are being investigated. A group of surface-exposed high-molecular-weight proteins that are major targets of antibody in human convalescent sera were identified. Monoclonal antibodies to the high-molecular-weight proteins of a prototype strain recognized two distinct but related proteins and were bactericidal for the prototype strain and other strains that shared the epitope recognized by the monoclonals. Genes encoding the two proteins in the prototype strain recognized by the monoclonals were cloned and sequenced. The sequences were distinct but related, and the derived amino acid sequences had sequence similarity to that of filamentous hemagglutinin of Bordetella pertussis, an important adherence factor and protective antigen.
Skin-inspired hydrogel–elastomer hybrids with robust interfaces and functional microstructures (2016)

Inspired by mammalian skins, soft hybrids integrating the merits of elastomers and hydrogels have potential applications in diverse areas including stretchable and bio-integrated electronics, microfluidics, tissue engineering, soft robotics and biomedical devices. However, existing hydrogel-elastomer hybrids have limitations such as weak interfacial bonding, low robustness and difficulties in patterning microstructures. Here, we report a simple yet versatile method to assemble hydrogels and elastomers into hybrids with extremely robust interfaces (interfacial toughness over 1,000 Jm(-2)) and functional microstructures such as microfluidic channels and electrical circuits. The proposed method is generally applicable to various types of tough hydrogels and diverse commonly used elastomers including polydimethylsiloxane Sylgard 184, polyurethane, latex, VHB and Ecoflex. We further demonstrate applications enabled by the robust and microstructured hydrogel-elastomer hybrids including anti-dehydration hydrogel-elastomer hybrids, stretchable and reactive hydrogel-elastomer microfluidics, and stretchable hydrogel circuit boards patterned on elastomer.
Tests for the measurement of factor VII-activating protease (FSAP) activity and antigen levels in citrated plasma, their correlation to PCR testing, and utility for the detection of the Marburg I-polymorphism of FSAP (2008)

The ACRS PCR test is useful for laboratories that do not have the equipment to perform probe or SYBR Green I based real-time PCR. Furthermore, the tests developed for the determination of FSAP activity and antigen levels are convenient for determining clinical correlations, even for large population studies. The ratio of activity and antigen level of FSAP appears to be a promising and efficient alternative to molecular diagnostic techniques to detect the MRI polymorphism of FSAP.
Silyl enol etherification by a Tf<sub>2</sub>NH/amine co-catalytic system for minimizing hazardous waste generation (2018)

A practical silyl enol etherification of ketones with allylsilanes catalyzed by a Tf<sub>2</sub>NH–amine co-catalyst under mild conditions has been developed.
Green Synthesis of TiO2 Nanoparticles Using Natural Marine Extracts for Antifouling Activity (2023)

Titanium dioxide (TiO<sub>2</sub>) nanoparticles were synthesized via a novel eco-friendly green chemistry approach using marine natural extracts of two red algae (<i>Bostrychia tenella</i> and <i>Laurencia obtusa</i>)<i>,</i> a green alga (<i>Halimeda tuna</i>), and a brown alga (<i>Sargassum filipendula</i>) along with a marine sponge sample identified as <i>Carteriospongia foliascens</i>. X-ray diffraction (XRD), scanning electron microscope (SEM), UV-Vis, X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and Fourier-transform infrared spectroscopy (FTIR) were employed to characterize the crystal structure, surface morphology, and optical properties of the synthesized nanoparticles. Each of the as-synthesized marine extract based TiO<sub>2</sub> nanoparticles was individually incorporated as an antifouling agent to form a newly fabricated marine paint formulation. The newly prepared formulations were applied on unprimed steel panels. A comparative study with a commercial antifouling paint (Sipes Transocean Coatings Optima) was carried out. After 108 days of the coated steel panels' immersion in the Eastern Harbour seawater of Alexandria-Egypt, the prepared paints using <i>B. tenella</i> and <i>C. foliascens</i> extracts demonstrated an excellent antifouling performance toward fouling organisms by inhibiting their settlement and controlling their adhesion onto the immersed panels. In contrast, heavy fouling with barnacles was observed on the surface of the coated panel with the commercial paint. The physicochemical parameters of the seawater surrounding the immersed coated panels were estimated to investigate the influence of the fabricated paint formulations. Interestingly, no effects of the immersed coated panels on the physicochemical characteristics of the surrounding seawater were observed. Based on the obtained results and a comparison with commercially available antifouling products, the marine extract based TiO<sub>2</sub> nanoparticle preparations of <i>B. tenella</i> and <i>C. foliascens</i> are promising candidates for eco-friendly antifouling agents. Based on the obtained results and a comparison with commercially available antifouling products, the marine extract based TiO<sub>2</sub> nanoparticle preparations of <i>B. tenella</i> and <i>C. foliascens</i> are promising candidates for eco-friendly antifouling agents, which could be attributed to the small crystallite sizes of 22.86 and 8.3 nm, respectively, in addition to the incorporation of carbon in the crystal structure of the nanoparticles.
Achieving Interconnected Pore Architecture in Injectable PolyHIPEs for Bone Tissue Engineering (2013)

Template polymerization of a high internal phase emulsion (polyHIPE) is a relatively new method to produce tunable high-porosity scaffolds for tissue regeneration. This study focuses on the development of biodegradable injectable polyHIPEs with interconnected porosity that have the potential to fill bone defects and enhance healing. Our laboratory previously fabricated biodegradable polyHIPEs that cure in situ upon injection; however, these scaffolds possessed a closed-pore morphology, which could limit bone ingrowth. To address this issue, HIPEs were fabricated with a radical initiator dissolved in the organic phase rather than the aqueous phase of the emulsion. Organic-phase initiation resulted in macromer densification forces that facilitated pore opening during cure. Compressive modulus and strength of the polyHIPEs were found to increase over 2 weeks to 43±12 MPa and 3±0.2 MPa, respectively, properties comparable to cancellous bone. The viscosity of the HIPE before cure (11.0±2.3 Pa·s) allowed for injection and filling of the bone defect, retention at the defect site during cure under water, and microscale integration of the graft with the bone. Precuring the materials before injection allowed for tuning of the work and set times. Furthermore, storage of the HIPEs before cure for 1 week at 4°C had a negligible effect on pore architecture after injection and cure. These findings indicate the potential of these emulsions to be stored at reduced temperatures and thawed in the surgical suite before injection. Overall, this work highlights the potential of interconnected propylene fumarate dimethacrylate polyHIPEs as injectable scaffolds for bone tissue engineering.
Continuous Melt Polymerization of Polyetherimides (1989)

Abstract A new process for continuous melt polymerization of aromatic dianhydrides and diamines has been developed. The process consists of several integrated stages: feeding, melting, devolatilization, mixing, and advanced polymerization. The transport phenomena and coupled reaction rates have been studied in a corotating, intermeshing twin-screw reactor/extruder. Each stage in this process has been analyzed. The results show the importance of viscous heat for melting monomers, free surface generation in mass transfer, total shear strain in distributive mixing, and back mixing for extended residence time and advanced polymerization. High molecular weight polyetherimide (M w 50 × 10 3 ) was obtained with this process for a variety of conditions. The reactions were run with 3 mole % of monofunctional anhydride to cap the polymer ends at a specific molecular weight for the most desirable balance of mechanical and physical properties.
Graphene for Controlled and Accelerated Osteogenic Differentiation of Human Mesenchymal Stem Cells (2011)

Current tissue engineering approaches combine different scaffold materials with living cells to provide biological substitutes that can repair and eventually improve tissue functions. Both natural and synthetic materials have been fabricated for transplantation of stem cells and their specific differentiation into muscles, bones, and cartilages. One of the key objectives for bone regeneration therapy to be successful is to direct stem cells' proliferation and to accelerate their differentiation in a controlled manner through the use of growth factors and osteogenic inducers. Here we show that graphene provides a promising biocompatible scaffold that does not hamper the proliferation of human mesenchymal stem cells (hMSCs) and accelerates their specific differentiation into bone cells. The differentiation rate is comparable to the one achieved with common growth factors, demonstrating graphene's potential for stem cell research.
Hybrid Honeycomb Panel Heat Rejection System (1987)

The evolution of a hybrid honeycomb panel heat rejection system concept for future high-power spacecraft is described. Performance evaluation of this heat pipe-based hybrid radiator is based on data and prediction models from a developmental component hardware testing program. The concept integrates three high-performance components into an optimized radiator system. These components are the sideflow heat pipe transport leg, honeycomb panel evaporator, and light-weight high-efficiency heat pipe fins. A 3.05 m (10 ft.) long hybrid radiator was designed considering remnant hardware available from other Hughes programs. The key performance objective for the hybrid radiator was to demonstrate high thermal transport capacity, increased radiating fin lengths, improved thermal efficiency across structural boundaries, and reduced weight. Analysis showed that 9000 W can be transported over a 3.05 m radiator and that finlengths of up to 1 m are possible.
Computer-aided detection of clustered microcalcifications in digital breast tomosynthesis: A 3D approach (2011)

Our study indicates the feasibility of the 3D approach to the detection of clustered microcalcifications in DBT and that the newly designed enhancement-modulated 3D calcification response function is promising for prescreening. Further work is needed to assess the generalizability of our approach and to improve its performance.
SYNTHESIS AND PROPERTIES OF CONDENSED UREIDOMETHYL PHOSPHONIUM SALTS (1981)

Abstract Urea, N-methylurea, and 1,3-dimethylurea react with tetrakis(hydroxymethyl)phosphonium chloride (THPC) in molar ratios lower than 4: 1, forming condensed quaternary ureidomethyl phosphonium salts. The urea and N-methylurea products are polymeric gels, whereas the 1,3-dimethylurea products are cyclic crystalline solids. Some of the phosphonium salts are interconvertible through condensation or displacement reactions. Hydrolysis of the phosphonium salts, followed by oxidation, yields tertiary phosphine oxides having similar properties. The products were characterized by IR, NMR, and electron spectroscopy for chemical analysis (ESCA).