gebhart/patrepeval huggingface dataset:
Design of a miniature solid state feed-thru nuller (2002)

A CW (continuous wave) radar receiver utilizing a solid-state feed-through nulling (FTN) system and providing 50 dB of signal cancellation over a 3% frequency band centered in X-band, has been developed. The transmits sample is amplitude and phase adjusted with a feedback system to be equal in magnitude and opposite in phase to the feed-through. This results in up to 60 dB of reduction in the feed-through signal level before it reaches the receiver's active front-end components. FTN cancels AM and FM noise sidebands on the feed-through by the same amount that the carrier is canceled, allowing CW radars to operate with reasonable transmitter output purity. The noise performance of the feed-through nuller proved to be the most difficult problem to solve, and the performance of the present design slightly degrades the noise figure of the radar receiver. Work is currently underway to improve this noise performance.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Image encryption using the Sudoku matrix (2010)

This paper introduces a new effective and lossless image encryption algorithm using a Sudoku Matrix to scramble and encrypt the image. The new algorithm encrypts an image through a three stage process. In the first stage, a reference Sudoku matrix is generated as the foundation for the encryption and scrambling processes. The image pixels' intensities are then changed by using the reference Sudoku matrix values, and then the pixels' positions are shuffled using the Sudoku matrix as a mapping process. The advantages of this method is useful for efficiently encrypting a variety of digital images, such as binary images, gray images, and RGB images without any quality loss. The security keys of the presented algorithm are the combination of the parameters in a 1D chaotic logistic map, a parameter to control the size of Sudoku Matrix and the number of iteration times desired for scrambling. The possible security key space is extremely large. The principles of the presented scheme could be applied to provide security for a variety of systems including image, audio and video systems.
A Simple Set of Plasmids for the Production of Transgenic Plants (2010)

A new set of plasmids for plant transgenic studies was developed. Its strong point is that independent gene cassettes are connected within one binary vector by the restriction endonuclease-based technique only. Using the set, two overexpressing cassettes and three RNA interference (RNAi) cassettes were successfully introduced into rice. Our plasmid set is useful for producing commercial transgenic plants, especially in the case of rice.
Crystalline alumina deposited at low temperatures by ionized magnetron sputtering (1997)

Ionized magnetron sputtering based on the work of Rossnagel and Hopwood [J. Vac. Sci. Technol. B 12, 449 (1994)] has been used to deposit alumina films containing orthorhombic κ alumina and monoclinic θ alumina at substrate temperatures of 370 to 430 °C. An inductively coupled rf Ar/O2/Al discharge between the sputter source and the heated substrate table was used to effectively ionize not only Ar but more importantly Al and O2. Both ion energy as well as the ion flux to the substrate influence the structure and properties of the coatings. The ion energy was controlled by the substrate bias potential, and the ion flux by means of the rf power supplied to the coil. The effect of the degree of ionization and therefore the ion flux to the substrate was studied at a constant substrate bias potential of −70 V. It was found that as the ion flux to the substrate was increased, the film crystallinity increased (i.e. the Bragg diffraction peaks were sharper and had higher intensity). It was shown that the formation temperature for κ alumina can be drastically decreased if high fluxes of reactive Al ions are employed to increase the energy at the substrate. Depending on the ion energy and ion flux, films with hardness values usually reported for chemical vapor deposition (CVD) κ alumina could be deposited at a maximum substrate temperature of 430 °C as opposed to ∼1000 °C by CVD. The process described allows for the first time the deposition of κ alumina onto metallic substrates such as hardened high speed steel without softening it.
Joint Node Localization and Time-Varying Clock Synchronization in Wireless Sensor Networks (2013)

The problems of node localization and clock synchronization in wireless sensor networks are naturally tied from a statistical signal processing perspective. In this work, we consider the joint estimation of an unknown node's location and clock parameters by incorporating the effect of imperfections in node oscillators, which render a time varying nature to the clock parameters. The data exchange mechanism is based on a two-way message exchange with anchor nodes. In order to alleviate the computational complexity associated with the optimal maximum a-posteriori estimator, two iterative approaches are proposed as simpler alternatives. The first approach utilizes an Expectation-Maximization (EM) based algorithm which iteratively estimates the clock parameters and the location of the unknown node. The EM algorithm is further simplified by a non-linear processing of the data to obtain a closed form solution of the location estimation problem using least squares (LS). The performance of the estimation algorithms is benchmarked by deriving the Hybrid Cramer-Rao lower bound (HCRB) on the mean square error (MSE) of the estimators. The theoretical findings are corroborated by simulation studies which reveal that the LS estimator closely matches the performance of the EM algorithm for small time of arrival measurement noise, and is well suited for implementation in low cost sensor networks.
Evaluation of ethylene-vinyl acetate copolymer as a non-inflammatory alternative to Freund's complete adjuvant in rabbits. (1985)

Ethylene-vinyl acetate copolymer (EVAc) was evaluated as an antigen delivery device in laboratory rabbits. Bovine serum albumin (BSA) was incorporated with EVAc in a pellet, which was implanted subcutaneously. Serum antibody titers to BSA in four implanted rabbits were equal to titers in four rabbits injected twice with BSA in complete Freund's adjuvant. Three of four rabbits implanted with EVAc displayed no inflammation or systemic illness in response to the pellet. The fourth rabbit repeatedly developed a small abscess at the implantation site, but the lesions were less severe than complete Freund's adjuvant injection sites. The EVAc pellet is recommended as a non-inflammatory alternative method to Freund's adjuvants for producing serum antibody in rabbits.
Separation of CO<sub>2</sub>/N<sub>2</sub> mixtures using MFI‐type zeolite membranes (2004)

Abstract MFI‐type zeolite (ZSM5) membranes were prepared on alumina and stainless steel tubular supports and tested for the separation of CO 2 /N 2 mixtures. The effect of several operating variables (temperature, feed and permeate pressures, feed composition, use of sweep gas, presence of water in the feed, membrane module configuration) was investigated. The separation between CO 2 and N 2 takes place because of the preferential adsorption of CO 2 , which hinders the permeation of N 2 through the zeolite pore network. The best results in this work were obtained with a Na‐ZSM5 membrane, and using a large pressure gradient. In this case, a permeation flux as large as 9.2 kg/(m 2 · h) [permeance of 2.6 × 10 −6 mol/(m 2 · s · Pa)] with a CO 2 /N 2 separation factor of 13.7 was obtained. © 2004 American Institute of Chemical Engineers AIChE J, 50: 127–135, 2004
<i>Pax6</i> is essential for establishing ventral-dorsal cell boundaries in pituitary gland development (1999)

Pax6, a highly conserved member of the paired homeodomain transcription factor family that plays essential roles in ocular, neural, and pancreatic development and effects asymmetric transient dorsal expression during pituitary development, with its expression extinguished before the ventral --> dorsal appearance of specific cell types. Analysis of pituitary development in the Small eye and Pax6 -/- mouse mutants reveals that the dorsoventral axis of the pituitary gland becomes ventralized, with dorsal extension of the transcriptional determinants of ventral cell types, particularly PFrk. This ventralization is followed by a marked decrease in terminally differentiated dorsal somatotrope and lactotrope cell types and a marked increase in the expression of markers of the ventral thyrotrope cells and SF-1-expressing cells of gonadotrope lineage. We suggest that the transient dorsal expression of Pax6 is essential for establishing a sharp boundary between dorsal and ventral cell types, based on the inhibition of Shh ventral signals.
Compact polarization rotator on silicon for polarization-diversified circuits (2011)

We demonstrate a polarization rotator based on adiabatic mode evolution on silicon for polarization-diversified circuits. The rotator has a device length of 420 μm, a polarization-conversion efficiency of more than 90%, and an insertion loss less than 1 dB for a wavelength range of 80 nm. Combining the rotator with a compact, broadband polarization beam splitter based on cascaded directional couplers enhances the polarization conversion extinction ratio to over 30 dB with less than 1.5 dB total insertion loss over a 60 nm spectral range.
Formation of Group 11 Bismuth Sulfide Nanoparticles Using Bismuth Dithioates under Mild Conditions (2017)

The formation of mixed-metal sulfides with the general structure AgBiS<sub>2</sub> and Cu<sub>3</sub> BiS<sub>2</sub> by a simple two-step process utilizing bismuth dithiocarboxylates as Bi and S precursors is described. A sonochemical reaction of Bi<sub>2</sub> O<sub>3</sub> with six different aryl dithioic acids: dithiobenzoic acid (BDT-H), 4-methoxydithiobenzoic acid (4-MBDT-H), 3-methyldithiobenzoic acid (3-MBDT-H), 2-mesitylenedithioic acid (2-MDT-H), 4-fluorodithiobenzoic acid (4-FBDT-H), and 2-thiophenedithioic acid (2-TDT-H) resulted in the corresponding complexes: [Bi(BDT)<sub>3</sub> ] 1, [Bi(4-MBDT)<sub>3</sub> ] 2, [{Bi(3-MBDT)<sub>3</sub> }<sub>2</sub> ⋅C<sub>7</sub> H<sub>8</sub> ] (3<sub>2</sub> ⋅C<sub>7</sub> H<sub>8</sub> ), [Bi(2-MDT)<sub>3</sub> ] 4, [Bi(4-FBDT)<sub>3</sub> ] 5 and [Bi(2-TDT)<sub>3</sub> ] 6. Microwave irradiation of these bismuth(III)aryldithioate complexes with AgNO<sub>3</sub> or CuCl under mild reaction conditions (140 °C) resulted in the respective mixed-metal sulfides. Attempt to synthesize AuBiS<sub>2</sub> using similar reaction protocols were unsuccessful, resulting only in the formation of elemental Au<sup>0</sup> , S<sub>8</sub> and BiOCl.
Fixing the field joint that failed on the Challenger (1991)

The Challenger accident in January 1986 led to an extensive redesign effort for the solid rocket booster. A redesign team accomplished this redesign effort and manufacture of the redesigned solid rocket motor for return to flight in 32 months. The successful flight of Discovery (STS-26R) on September 29,1988, capped the most intense redesign and testing program conducted in solid rocket history. This paper addresses the redesign of the field joint only. Since the field joint redesign required significant time to incorporate changes to the basic steel case, NASA and the National Research Council requested that the redesign include improved safety margins in all areas of the solid rocket motor where hardware retrieved from prior flights indicated potential safety margin problems. As a result, design changes were incorporated into the solid rocket motor from stem to stern: field joint metal parts and insulation were modified; igniter chamber was modified; insulation thickness in all segments was increased; case-to-nozzle joint was redesigned; redundant and verifiable seals in the internal nozzle joints were incorporated; several ablative carbon-cloth phenolic components of the nozzle were modified; and several adhesive materials and processes used in various areas of the solid rocket motor were changed.
Endothelin receptor blockade inhibits the growth of human papillomavirus-associated cervical carcinoma (2002)

Human papillomaviruses (HPVs) are associated with cervical cancer and interact with growth factors that may enhance malignant transformation of cervical carcinoma cells. Endothelin-1 (ET-1) is released from HPV-transfected keratinocytes and induces increased growth response in these cell lines in comparison with normal cells. HPV-positive cancer cells secrete ET-1 and express mRNA for ET-1 and its receptors, whereas HPV-negative carcinoma cell lines express only the ET(B) receptor (ET(B)R) mRNA and do not secrete ET-1. In HPV-positive cancer cells, ET(A)R mediates the ET-1-induced mitogenic effect and sustains the basal growth rate of unstimulated cervical tumour cells. Therefore, ET-1 may be involved in the neoplastic growth of HPV-associated cervical carcinoma, where the increased ET-1 autocrine loop can be targeted for antitumour therapy. In the present work, the action of specific antagonists of ET(A)R (BQ-123 and ABT-627), was analysed in CaSki and C33A cells that are derived from human cervical carcinoma. CaSki cells are HPV-16-positive, produce ET-1 and possess ET(A)R and ET(B)R, whereas the C33A line is HPV-negative, does not secrete ET-1 and has no ET(A)R. In HPV-positive cancer cells ABT-627 strongly inhibited the proliferation induced by ET-1 and substantially reduced the basal growth rate of unstimulated cervical tumour cells, whereas the ET(B)R antagonist had no effect. These results demonstrate that ET-1 participates in the progression of neoplastic growth in HPV-associated carcinoma, in which ET(A)R expression is increased and could be targeted for antitumour therapy. In conclusion, an ET-1 autocrine loop is involved in tumour cell proliferation via ET(A)R, and ABT-627 is effective in controlling proliferation of cervical carcinoma cells.
Managerial decision horizon and real estate investment trusts (REITs) (2017)

Purpose The purpose of this paper is to examine the effects of managerial decision horizon (MDH) on real estate investment trust (REIT) behavior and performance. Design/methodology/approach In this study, the authors expand the number of proxies and measure managerial horizon by CEO age, CEO tenure, cash compensation relative to total compensation, and the amount of vested equity-based compensation to total compensation. To avoid potential measurement error, the authors compute the average ranking score of the four individual measures to determine the overall MDH of a CEO. Cross-sectional time series regressions are then performed on the effects of CEO MDH on REIT policies and performance. The authors also examine if the effect of myopic MDH can be mitigated by good corporate governance. For robustness purpose, the authors also compare the effects of age-related MDH and compensation-related MDH. Findings The results show that REITs managed by CEOs with short MDHs have lower levels of asset growth and a lower standard deviation of return on assets. These REITs also have lower debt levels, lower dividend payouts, and hold more cash. The results suggest that short-horizon CEOs have incentives to lower investment risk, default risk, and liquidity risk at the firm level in order to protect personal benefits. CEOs with a short horizon also have a negative impact on REIT performance. The results also show that CEO compensation-related horizon problems are mitigated by corporate governance, but CEO age-related horizon problems are significant and persistent. The results suggest that age-related behavioral biases of the CEO are important determinants of corporate decisions. Practical implications The results of this study suggest that the managerial behavioral biases should be considered in understanding firm behavior. Originality/value This is the first study that examines the effects of MDH on REIT behavior and performance. The unique regulatory environment of REITs makes them less susceptible to agency problems of free cash flow and thus provides a clearer picture of the effect of MDH. Prior studies focus on the effect of managerial horizon on firm investment activity, this study expands the scope to examine the effects on investment and financial policies. In addition, this study adds to the literature by showing that the effect of age-related horizon problems may not be mitigated by good corporate governance.
Correlative study of properties of water in biological systems using ultrasound and magnetic resonance (1986)

Ultrasonic and nuclear magnetic resonance properties of media rich in water are investigated. The chemical shift of the water proton in pure water, aqueous solutions of tertiary butanol, and sodium chloride is shown to be linearly correlated to the reciprocal of sound speed in these media. A new method of determining the self-diffusion coefficient of water by using acoustic nonlinearity and sound speed is proposed. The method is tested on a variety of media that include pure water, aqueous solutions of glycerol, serum albumin, egg constituents, plant tissues, frog muscle and liver, and excised human tissues. In all the cases the results are found to compare closely to diffusion coefficients measured by magnetic resonance. The results presented here indicate that the acoustic and magnetic resonance modalities, though inherently different in their origin, can provide closely related information on the properties of water.
Tissue Distribution of GD3 Ganglioside Detected by Mouse Monoclonal Antibody R24 (1989)

Mouse monoclonal antibody (MoAb) R24 detects the disialoganglioside GD3, a neuroectodermal antigen expressed by normal melanocytes and melanomas. This antibody has been used to define the immunohistochemical distribution of GD3 antigen in normal and malignant human tissues. The present study shows that staining with MoAb R24 in normal organs and tissues where low concentrations of the antigen can be detected. The highest expression of GD3 was detected on the surface of melanoma cells. Therefore, MoAb R24 can be a useful reagent for studying cells of melanocytic lineage, and for imaging and therapeutic studies of melanomas.
Structural Diversity in Social Recommender Systems. (2013)

Online social networks have become important for sharing, dis-covery, communication, and networking. Recommender systems are an essential part of any social network. For example, recom-mending people to connect with is essential for the growth of the network since an online social network is only partially observed and two people might know each other but may not be connected. In this paper, we analyze data from LinkedIn, the largest online professional social network, which recommends other members to connect through its “People You May Know ” feature. Analyzing the effect of structural diversity on the invitation rate from such member recommendations, we find that higher connection density and lower structural diversity results in a higher connection invitation rate. We also analyze and study the effects of structural diversity of members’ connection networks on their engagement on the LinkedIn network.
Cornea and Sclera (1972)

Our website uses cookies to enhance your experience. By continuing to use our site, or clicking "Continue," you are agreeing to our Cookie Policy | Continue JAMA Ophthalmology HomeNew OnlineCurrent IssueFor Authors Podcast Publications JAMA JAMA Network Open JAMA Cardiology JAMA Dermatology JAMA Health Forum JAMA Internal Medicine JAMA Neurology JAMA Oncology JAMA Ophthalmology JAMA Otolaryngology–Head & Neck Surgery JAMA Pediatrics JAMA Psychiatry JAMA Surgery Archives of Neurology & Psychiatry (1919-1959) JN Learning / CMESubscribeJobsInstitutions / LibrariansReprints & Permissions Terms of Use | Privacy Policy | Accessibility Statement 2023 American Medical Association. All Rights Reserved Search All JAMA JAMA Network Open JAMA Cardiology JAMA Dermatology JAMA Forum Archive JAMA Health Forum JAMA Internal Medicine JAMA Neurology JAMA Oncology JAMA Ophthalmology JAMA Otolaryngology–Head & Neck Surgery JAMA Pediatrics JAMA Psychiatry JAMA Surgery Archives of Neurology & Psychiatry Input Search Term Sign In Individual Sign In Sign inCreate an Account Access through your institution Sign In Purchase Options: Buy this article Rent this article Subscribe to the JAMA Ophthalmology journal
Chemiluminescence of Hemoglobin and Identification of Related Compounds with the Hemoglobin Chemiluminescence in Plasma¶ (2001)

A low level of chemiluminescence by hemoglobin (Hb) was detected in the reaction with H2O2 and hydrogen donors such as gallic acid and catechins. The photon intensity was affected by the ferric state of Hb (methemoglobin > oxyhemoglobin), and was roughly correlated with the radical-scavenging potential of catechins. We hypothesized the reversible activation reaction of Hb as the chemiluminescence mechanism of the H2O2/gallic acid/Hb system. It is indicated that the oxidized-Hb (Hb-OOH) formation was a chemiluminescence-rate-determining step and one-electron reduction by a hydrogen donor of the compound-I-type intermediate ([.XFeIV] = O) proved a chemiluminescence-specificity-determining step. Spectral analysis showed that the photon emission from the H2O2/gallic acid/Hb system was produced without singlet oxygen generation. The concentration dependence of photon intensity suggests a high consumption ratio of H2O2 leading to protection from H2O2 toxicity. Albumin was defined as a hydrogen donor by the isolation of chemiluminescent substance in plasma using this chemiluminescence system.
Localized Hyperthermia in the Treatment of Malignant Brain Tumors Using an Interstitial Microwave Antenna Array (1984)

An interstitial microwave antenna array hyperthermia (IMAAH) system was evaluated in a series of acute experiments for its ability to generate localized hyperthermic fields in the normal adult and developing dog brain. Using a single microwave antenna, the maximum diameter of heating greater than or equal to 42°C was 1.3 cm. Using four microwave antennas, temperatures greater than or equal to 42°C were obtained over a 2.5 cm cross-sectional diameter. Normal gray matter cannot be heated above 42.2°C for 60 min without causing acute damage to cortical neurons. Edema formation can occur at temperatures as low as 42°C in both gray and white matter. Disruption of myelin tracts in white matter is apparent at temperatures of 43.0-43.5°C. The IMAAH system generates significantly higher and more variable temperature distributions in virally induced experimental brain tumors than in the developing dog brain at the same power levels.