gebhart/patrepeval huggingface dataset:
Tandem Repeat Recombination Induced by Replication Fork Defects in Escherichia coli Requires a Novel Factor, RadC (1999)

DnaB is the helicase associated with the DNA polymerase III replication fork in Escherichia coli. Previously we observed that the dnaB107(ts) mutation, at its permissive temperature, greatly stimulated deletion events at chromosomal tandem repeats. This stimulation required recA, which suggests a recombinational mechanism. In this article we examine the genetic dependence of recombination stimulated by the dnaB107 mutation. Gap repair genes recF, recO, and recR were not required. Mutations in recB, required for double-strand break repair, and in ruvC, the Holliday junction resolvase gene, were synthetically lethal with dnaB107, causing enhanced temperature sensitivity. The hyperdeletion phenotype of dnaB107 was semidominant, and in dnaB107/dnaB+ heterozygotes recB was partially required for enhanced deletion, whereas ruvC was not. We believe that dnaB107 causes the stalling of replication forks, which may become broken and require repair. Misalignment of repeated sequences during RecBCD-mediated repair may account for most, but not all, of deletion stimulated by dnaB107. To our surprise, the radC gene, like recA, was required for virtually all recombination stimulated by dnaB107. The biochemical function of RadC is unknown, but is reported to be required for growth-medium-dependent repair of DNA strand breaks. Our results suggest that RadC functions specifically in recombinational repair that is associated with the replication fork.
Electrospray ionization: a new tool for the analysis of ionic transition-metal complexes (1990)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrospray ionization: a new tool for the analysis of ionic transition-metal complexesViswanatham Katta, Swapan K. Chowdhury, and Brian T. ChaitCite this: J. Am. Chem. Soc. 1990, 112, 13, 5348–5349Publication Date (Print):June 1, 1990Publication History Published online1 May 2002Published inissue 1 June 1990https://pubs.acs.org/doi/10.1021/ja00169a051https://doi.org/10.1021/ja00169a051research-articleACS PublicationsRequest reuse permissionsArticle Views451Altmetric-Citations156LEARN 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
Deep UV exposure of Ag<sub>2</sub>Se/GeSe<sub>2</sub>utilizing an excimer laser (1984)

Although inorganic resists are characterized by high contrast and resolution, they have traditionally suffered from poor sensitivity. We have investigated the use of a rare-gas halide excimer laser operating at λ = 249 nm to expose the inorganic resist Ag <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> Se/GeSe <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> . Well-controlled lines and spaces, each of 0.5-µm width, were contact printed using a chromium-on-quartz mask. By increasing the peak dose rate to about 520 kW/cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> , we found that the required dose could be lowered from 130 to 5.2 mJ/cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ; this sensitivity is a factor of 250 better than that obtained with exposures at λ = 436 nm and low power densities. The reciprocity failure at these high flux rates can be explained by a locally induced temperature rise.
About Location-aware Mobile Messages: Expert System Based on WiFi Spots (2011)

This paper describes a new model for proactive messages delivery to mobile phones. SpotEx application can use any Wi-Fi access point as presence sensor that could activate delivery for some user-generated messages right to mobile phones. The key idea is how to associate some user-defined messages and Wi-Fi access points. As a result we can build rule-based expert system that describes delivery of user-defined messages depending on visibility of Wi-Fi hotspots.
Band Discontinuities in Gallium Phosphide/Crystalline Silicon Heterojunctions Studied by Internal Photoemission (2008)

We measured the band lineup of gallium phosphide (GaP) on crystalline silicon (c-Si) heterojunctions (HJs) by using internal photoemission (IPE), where the heterojunctions were prepared by using solid-source molecular beam epitaxy. It was found that the conduction-band and valence-band discontinuities, denoted by ΔEc and ΔEv, are 0.09±0.01 and 1.05±0.01 eV, respectively. By performing measurements on samples with different GaP layer thicknesses, we clarified that ΔEv of the present GaP-on-Si HJs is not affected by strain normal to the growth direction. The values of ΔEc and ΔEv obtained for the GaP-on-Si HJs are significantly different from those reported for thin Si-on-GaP HJs, and the implications of this discrepancy are briefly discussed.
Filtration-assisted exchange transfusion using alpha alpha Hb, an erythrocyte substitute (1991)

A method for improving the efficiency of exchange transfusion to evaluate hemoglobin- (Hb) based erythrocyte substitutes is described. The method uses a continuous-flow hollow-fiber plasma separation filter to remove the erythrocytes while returning 75% of the plasma. The removed volume was replaced with a 14-g/dl solution of human Hb cross-linked between the alpha-chains with bis(3,5-dibromosalicyl)fumarate (alpha alpha Hb). Filtration of 2.76 blood vol in anesthetized swine resulted in a 95% reduction of hematocrit and produced a plasma Hb concentration of 7.63 g/dl. Hyperoncotic Hb solutions cause volume expansion, which reduces the efficiency of exchange but provides hemodynamic stability in the face of decreasing blood viscosity and subsequent intravascular volume loss with Hb redistribution. Filtration-assisted exchange transfusion is rapid, conserves valuable modified Hb, and ensures continuous adequate oxygen delivery.
Radiotelemetry of the Respiration of a Flying Duck (1962)

Respirations of a flying wild mallard duck, Anas platyrhynchos, appear to be synchronized with wing beat in a ratio of 1 to 2. Wing beats come during exhalation and between respirations. The average number of respirations was 14 per minute for a resting duck and 96 per minute for a flying duck.
Evaluation of Decision Tree Pruning Algorithms for Complexity and Classification Accuracy (2010)

Classification is an important problem in data mining. Given a database of records, each with a class label, a classifier generates a concise and meaningful description for each class that can be used to classify subsequent records. A number of popular classifiers construct decision trees to generate class models. These classifiers first build a decision tree and then prune subtrees from the decision tree in a subsequent pruning phase to improve accuracy and prevent "overfitting". In this paper, the different pruning methodologies available & their various features are discussed. Also the effectiveness of pruning is evaluated in terms of complexity and classification accuracy by applying C4.5 decision tree classification algorithm on Credit Card Database with pruning and without pruning. Instead of classifying the transactions either fraud or non-fraud the transactions are classified in four risk levels which is an innovative concept.
Temporal and spatial constraints on the collateral sprouting of low‐threshold mechanosensory nerves in the skin of rats (1984)

We have studied the collateral sprouting of intact low-threshold mechanosensory nerves into adjacent denervated skin in rats. An "isolated" field was produced by extensive denervations of the surrounding skin; sprouting of the remaining cutaneous nerve supplying the field was looked for in the form of field expansion into the surrounding denervated territory at various postoperative intervals. Such isolated fields failed to expand in the adult rat for periods up to at least 85 days. "Nonfunctional" sprouting is unlikely to explain this failure. However, similar experiments done in very young animals gave a different result. In rat pups aged less than 20 days, isolated fields did expand, but this ceased at about 20 days, and attempts to evoke it after this time were unsuccessful. There seems to be a critical period for sprouting of these touch-sensitive nerves into denervated skin, and our evidence suggests that it may not begin until about 15 days of age. Within this developmental window the sprouting that occurs is spatially constrained, an isolated field expanding preferentially into denervated skin of the parent dermatome; if only skin of neighboring dermatomes is available there is no expansion. In contrast, low-threshold nerves regenerated readily after a crush at all ages studied, and the mechanosensory fields established by regenerating nerves expanded progressively into denervated skin without apparent constraints at dermatomal boundaries. The temporal and spatial constraints found for the sprouting of intact low-threshold axons are in marked contrast to their absence for the well-described sprouting of high-threshold (nociceptive) nerves.
Large‐area black/white bistable cholesteric liquid‐crystal display and the thermal‐addressing system (2010)

Abstract— A 3‐m‐length black/white bistable cholesteric liquid‐crystal display was made by a roll‐to‐roll process and the display area is 25 × 300 cm. The black/white performance was made by black nano‐pigment and blended ChLC droplets with different wavelengths. It was written by a thermal‐addressing system, realizing high resolution and low cost.
Computation of DNP coupling factors of a nitroxide radical in toluene: seamless combination of MD simulations and analytical calculations (2012)

Dynamic nuclear polarization (DNP) employs paramagnetic species to increase the NMR signal of nuclear spins. In liquids, the efficiency of the effect depends on the strength of the interaction between the electron and nuclear spins and the time scales on which this interaction is modulated by the physical motion of the spin-bearing molecules. An approach to quantitatively predict the contribution of molecular motions to the DNP enhancement using molecular dynamics (MD) simulations is developed and illustrated for the nitroxide radical TEMPOL in liquid toluene. A multi-resolution strategy that combines explicit treatment of the solvent at short distances from the free radical with implicit description at large intermolecular distances is adopted. Novel analytical expressions are obtained to correct for the finite spatial extent of the MD simulations. The atomistic and analytical descriptions are sewn seamlessly together by ensuring that for molecular trajectories that start in the near (explicit) region and end in the distant (implicit) region the analytical dipolar spectral densities reproduce the MD estimates. The spectral densities obtained from the developed approach are used to calculate DNP coupling factors separately for the ring and methyl protons of toluene. The agreement with previously reported experimental DNP data at a magnetic field of 3.4 T is noteworthy and encouraging. Maximum obtainable DNP enhancements at other magnetic fields are predicted.
Solubility and density isotherms for potassium sulfate-water-2-propanol (1989)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolubility and density isotherms for potassium sulfate-water-2-propanolJerzy Mydlarz, Alan G. Jones, and Angel MillanCite this: J. Chem. Eng. Data 1989, 34, 1, 124–126Publication Date (Print):January 1, 1989Publication History Published online1 May 2002Published inissue 1 January 1989https://pubs.acs.org/doi/10.1021/je00055a033https://doi.org/10.1021/je00055a033research-articleACS PublicationsRequest reuse permissionsArticle Views233Altmetric-Citations26LEARN 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
Random access in coded wireless packet networks: Feasibility and distributed optimization (2011)

We study the throughput region of random access in coded wireless packet networks. We propose a distributed and robust fixed point algorithm that determines whether given coded information flow requirements are feasible with random access and computes the minimal required attempt probabilities supporting these requirements. Combined with linear coding subgraph and flow optimization, this yields a distributed algorithm for joint network coding and random access optimization for multicast networks. Numerical examples show that the proposed method reduces the gap of existing approaches to the optimal solution significantly.
Comparison via Roll-Over Shape of the kinematic performance of two low-cost foot prostheses (2014)

Bench tests are not sufficient to compare the performance of foot prostheses since only the dynamic behavior can be evaluated in the testing machines. This work supplements the bench tests described by several standards with a single patient (below knee amputee) kinematic evaluation using the concept of Roll-Over Shape to compare two low-cost prostheses against the sound limb. The Roll-Over Shape is generated first, by experimentally obtaining the trajectories of the patient's ankle, knee, and center of pressure throughout the stance phase of the gait cycle; and second by mathematically transforming these trajectories into a shank-based coordinate system with the ankle as origin. Unlike previous work that compares the roll-over parameters obtained via the quasi-static method, this paper compares the roll-shape of a trans tibia amputee wearing eather a SACH foot, or a high energy return foot (TEC-LIMBS), and the contralateral sound limb. The outcomes demonstrate a lower difference in the Roll-over radius of the TEC-LIMBS foot with respect to the sound limb (<;10%), while the SACH foot presents a greater difference with respect to the sound limb (>40%). The findings of the tests performed in this study indicate that the TEC-LIMBS foot has a better kinematic performance than the SACH type prosthesis, a prosthesis widely used for humanitarian purposes.
Depth map super-resolution via local and nonlocal priors (2014)

We propose a method for solving the depth map super-resolution problem. Given a low-resolution depth map as input, we recover a high-resolution depth map using a registered and potentially high-resolution color image. We formulate the super-resolution process as a regularization and optimization framework. Specifically, taking into account that discontinuities in depth and color tend to coalign, we obtain the local and nonlocal regularization terms based on the raw depth map and also the features of high-resolution color images. Different from conventional methods, we model the relationship with two constraint terms of local and nonlocal priors to sufficiently explore the complementary nature. Experimental results demonstrate the effectiveness of our approach, which produces sharper edges and more faithful details compared with other state-of-the-art strategies.
Anonymous Fuzzy Identity-based Encryption for Similarity Search. (2009)

Abstract. In this paper, we consider the problem of predicate encryption and focus on the predicate for testing whether the hamming distance between the attribute X of a data item and a target V is equal to (or less than) a threshold t where X and V are of length m. Existing solutions either do not provide attribute protection or produce a big ciphertext of size O(m2 m). For the equality version of the problem, we provide a scheme which is match-concealing (MC) secure and the sizes of the ciphertext and token are both O(m). For the inequality version of the problem, we give two practical schemes. The first one, also achieving MC security, produces ciphertext with size O(m tmax) if the maximum value of t, tmax, is known in advance and is a constant. We also show how to update the ciphertext if the user wants to increase tmax without constructing the ciphertext from scratch. On the other hand, in many real applications, the security requirement can be lowered from MC to MR (match-revealing). Our second scheme, which is MR secure, produces ciphertext of size O(m) andtokenofsizeO((t +1)m) only. Key words: predicate encryption, anonymous fuzzy identity-based encryption, inner-product encryption 1
Structure of α quartz (1926)

Abstract As soon as the structure of β quartz (these Proceedings, A, vol. 109, Sir William Bragg and R. E. Gibbs) was known, it was natural to reconsider that of the α variety and attempt to narrow down the range of uncertainty which existed. The general properties of both varieties of quartz have been dealt with fully in the paper mentioned above, and to avoid repetition it will be necessary to refer to it frequently. In that paper it was shown that the lowering of symmetry from β to α quartz introduced three extra unknown parameters, making four in all, a statement which sums up the whole difficulty of the determination of the α quartz structure. No guiding principle can be introduced simultaneously to aid in its solution, and one is left as before, with intensity measurements alone, to settle not one, but four parameters. However, all the physical properties of quartz suggest that there is but a small change at the transition temperature, and therefore it may be tentatively supposed that no very drastic alteration occurs in the structure.
STAT: a schematic to artwork translator for custom analog cells (2002)

STAT (schematic to artwork translator) is a program to generate full-custom layouts of analog cells from arbitrary schematic topologies in any IC technology. The circuit designer first annotates the schematic with component matching and symmetric relationships. Software subroutines are used to generate and/or identify device artwork. Related component groups are placed first, so annotated layout constraints are preserved. A novel placement method which recognizes that analog schematic topologies often reflect desirable layout configurations is proposed. A flexible cell-level router has been developed to complete the layout.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Comparison of Elastin Peptide Concentrations in Body Fluids from Healthy Volunteers, Smokers, and Patients with (1991)

SUMMARY Proteolysis of elastic fibers Is central to the development ofemp~a, and a simple, noninvasive assay of elastin degrad.tlon would be u..fulln dl.gnosls and In ther.peutlc monitor· Ing. we have .d.pted .n Indirect enzyme-lInkBd Immunosoment .ssay (ELISA) to determine pia.. m., urine, .nd bronchoalveol.r I.vage fluid (BALF) el.stln peptide concentr.tlons In nonsmolat,., healthy smolatrs, and patients with chronic obstructive pulmonary dl..... (COPO).PI.sma elastin peptide concentrations were significantly higher In subjects with COPO (66.8 ± 5.8 nglml, n = 10) compared with nonsmolat,. (23.4 ± 4.6 nglml, n =12), .nd healthy smolatrs had Intermedl· ate values (36.0 ± 6.8, n = 6), P < 0.05. Urine values (both unadjusted and norm.11zedto urln. creatinine concentration) were approximately 10·fold higher than plasm. In all subject groups, and the relative differences among groups were the ume .s for plasma, with values of 910.8 ± 105.6, 358.1 ± 101.2,.nd 281.0 ± &7.8 nglml for subJects with COPO(n =10), healthy smolat,. (n =6), and healthy nonsmolat,. (n = 12), respectively. Poor recovery of BALF In COPOsUbjects reduced differences In the BALFelastin peptide concentrations.mongsubject groups, although the healthy smolat,. and COPOsubjects tended to havehigher amounts. Assuming some dilution due to lavage technique, elastin peptide concentrations were estimated to be substantially higher In epithelial lining fluid than In pl.sma, suggesting lung as a slgnHlcant source of elastin peptldes In COPO. This Is the first application of elastin peptide measurement to human urine or BALF, and we eon­ elude that this asuy In urine Is useful In characterizing elastin turnqver In patients with or at risk for emphysema. AM REV RESPIR DIS 1.2; 141:712-781
Improvements in the heteroepitaxy of GaAs on Si by incorporating a ZnSe buffer layer (2002)

Heteroepitaxy of GaAs on Si with a ZnSe interlayer by low-pressure metalorganic chemical vapor deposition is reported. The structural and electrical properties of the GaAs epilayers grown on ZnSe/Si substrates were found to be superior to those of the GaAs directly on Si. The surface dislocation density of the GaAs/ZnSe/Si film can be reduced to 2*10/sup 5/ cm/sup -2/, which is one order of magnitude lower than that of GaAs/Si. A planar Schottky diode fabricated on the GaAs/ZnSe/Si sample shows a reverse breakdown voltage as high as 30 V, whereas the diode on GaAs/Si has a breakdown voltage of about 12 V. In addition, the residual stress in the GaAs heteroepilayers calculated from photoluminescence peak shifts was 8.2*10/sup 8/ dyn/cm/sup 2/ for the GaAs/ZnSe/Si structure, as compared to 2.7*10/sup 9/ dyn/cm/sup 2/ for the GaAs directly on Si. This indicates that the ZnSe intermediate layer is also effective in reducing the residual stress in the GaAs film grown in Si.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Large blueshift in the photoluminescence of pseudomorphic InGaAs/GaAs quantum wells grown in patterned (100) GaAs grooves and ridges with vertical sidewalls (1996)

Molecular beam epitaxial growth of pseudomorphic InGaAs quantum wells on (100) GaAs substrates, patterned with vertical sidewalls using reactive ion etching, were studied. Contrary to the redshift observed in the photoluminescence from the ridges and grooves of patterned substrates with (n11) sidewalls, we have observed a blueshift in the case of vertical sidewalls. The possibilities of change in the strain tensor and the change in composition of the InGaAs grown in the grooves or on the ridges were considered in order to explain this increase in band gap. We believe that the vertical sidewalls act as kink sites for the migrating adatoms instead of sources, as in the case of (n11) sidewalls. We have demonstrated a blueshift of up to 50 meV without any degradation in the intensity and linewidth of the photoluminescence spectra.