gebhart/patrepeval huggingface dataset:
Design and realization of local oscillator for VHF survival receiver (2010)

Local oscillator is an important device for survival radio system receiver. In this paper, a simple design and flexible configuration, local oscillator using DDS (Direct Digital Frequency Synthesis) technology has been designed and realized. Concerning with double conversion superheterodyne RF Front-End for the receiver, the local oscillator is to generate two channel sinusoidal signals whose frequencies are 130 and 70 MHz separately. The local oscillator consists of a CPLD (complex programmable logic device), two DDS chips, two crystal oscillators, and two low pass filters. The CPLD serving as the controller controls the operation of two DDS chips. The control parameters are stored in the UFM (User Flash Memory) block embedded in the CPLD. The complexity of the circuit is reduced effectively by synchronous serial communication protocol scheme applied between the CPLD and two DDS chips. Simulation and experiment results show that the logic circuit design of the controller is correct and the local oscillator has a good performance.
Physiology of Ex Planta Nitrogenase Activity in <i>Rhizobium japonicum</i> (1983)

Thirty-nine wild-type strains of Rhizobium japonicum have been studied for their ability to synthesize nitrogenase ex planta in defined liquid media under microaerobic conditions. Twenty-one produced more than trace amounts of acetylene reduction activity, but only a few of these yielded high activity. The oxygen response curves were similar for most of the nitrogenase-positive strains. The strains derepressible for activity had several phenotypic characteristics different from non-derepressible strains. These included slower growth and lower oxygen consumption under microaerobic conditions and lower extracellular polysaccharide production. Extracellular polysaccharide production during growth on gluconate in every nitrogenase-positive strain assayed was lower under both aerobic and microaerobic conditions than the non-derepressible strains. These phenotypic characteristics may be representative of a genotype of a subspecies of R. japonicum. These studies were done in part to enlarge the base number of strains available for studies on the physiology, biochemistry, and genetics of nitrogen fixation.
Treatment of Neurofibromas with a Carbon Dioxide Laser: A Retrospective Cross-Sectional Study of 106 Patients (2015)

<b><i>Background:</i></b> Few studies have evaluated the efficacy of carbon dioxide (CO<sub>2</sub>) laser ablation for treating neurofibromatosis type 1 (NF1). <b><i>Objective:</i></b> To evaluate laser treatment safety and patient satisfaction at the French National Referral Centre for Neurofibromatosis. <b><i>Methods:</i></b> Retrospective survey with a specific questionnaire. The principal outcome measures included pain evaluation and assessments of treatment safety. <b><i>Results:</i></b> We included 106 patients, 70% of whom had more than 50 neurofibromas. Laser treatment was performed mostly for aesthetic reasons, or due to pain, recurrent local trauma or familial influence, under a local anaesthetic, during outpatient visits. The mean pain score was 4.0 ± 2.7 during the administration of local anaesthesia, 2.4 ± 2.1 during laser treatment and <2 48 h after treatment in 56% of cases. The mean satisfaction score for the treatment was 4.6 ± 3.4 and was not associated with disease phenotype. <b><i>Conclusions:</i></b> CO<sub>2</sub> laser treatment for NF could be considered more frequently and might help to decrease the social impact of the disease.
Linear-assisted DC-DC converter based on CMOS technology (2008)

This article shows the design of an on-chip CMOS implementation for an alternative topology to classic switching DC-DC power converters. In the presented technique, an auxiliary linear regulator is used to cancel the output voltage ripple and provides fast responses for load and line variations. On the other hand, a switching converter, connected in parallel, allows supplying almost the whole output current demanded by the load. The objective of this linear-assisted converter or hybrid topology is to achieve a high efficiency of switching converters, with suitable load and line regulation features, typical of linear regulators. In order to implement on-chip power supply systems and on-chip power management systems with low- to-medium current consumption, this structure has good features. In this kind of on-chip applications, CMOS is the current prevailing technology. Thus, the article shows a possible implementation of a linear-assisted converter based on a 0.8-mum CMOS technology.
Practical prototyping (2001)

The design of robotic mechanisms is a complex process involving geometric, kinematic, dynamic, tolerance, and stress analyses. In the design of a real system, the construction of a physical prototype is often considered. Indeed, a physical prototype helps the designer to identify the fundamental characteristics and the potential pitfalls of the proposed architecture. However, the design and fabrication of a prototype using traditional techniques is rather long, tedious, and costly. In this context, the availability of rapid prototyping machines can be exploited in order to allow designers of robotic mechanisms to build prototypes rapidly and at a low cost. In the article, the rapid prototyping of mechanisms using a commercially available computer-aided design (CAD) package and a fused deposition modeling (FDM) rapid prototyping machine is presented. A database of lower kinematic pairs (joints) is developed using the CAD package, and parameters of fabrication are determined experimentally for each of the joints. These joints are then used in the design of the prototypes where the links are developed and adapted to the particular geometries of the mechanisms to be built. Also, a procedure is developed to build gears and Geneva mechanisms. Examples of mechanisms are then studied and their design is presented. For each mechanism, the joints are described and the design of the links is discussed. Some of the physical prototypes built using the FDM rapid prototyping machine are shown.
Adhesion induction by suture of varying tissue reactivity and caliber. (1982)

The importance of suture size and chronic reactivity in adhesion induction was evaluated in two experiments. In experiment I interrupted sutures (4/0 chromic, 4/0 polyglactin, and 6/0 polyglactin) were placed in the dorsal surfaces of rabbit uterine horns. Adhesions were infrequently induced by all suture materials. In experiment II 4-cm-long incisions were made in the distal antimesenteric uterine horns. These were then reapproximated with running sutures (4/0 chromic, 4/0 polyglactin, 6/0 polyglactin, and 8/0 nylon). Adhesion formation occurred to 16 of 18 incisions closed with 4/0 or 6/0 suture, whereas none of five incisions closed with 8/0 suture formed adhesions. These observations suggest that suture size rather than tissue reactivity is paramount in adhesion induction.
Chemie der Ginkgolide, II. Isolierung und Strukturaufklärung eines neuen Ginkgolids (1987)

Abstract Aus Blättern des Ginkgo‐Baumes wird ein neues Ginkgolid ( 5 ) isoliert, das wir als Ginkgolid J bezeichnen. Die Strukturaufklärung gelang sowohl mit spektroskopischen Methoden als auch durch chemischen Korrelation mit Ginkgolid C.
Chlamydomonas flagellar mutants lacking radial spokes and central tubules. Structure, composition, and function of specific axonemal components. (1978)

The fine structure, protein composition, and roles in flagellar movement of specific axonemal components were studied in wild-type Chlamydomonas and paralyzed mutants pf-14, pf-15A, and pf-19. Electron microscope examination of the isolated axoneme of pf-14 showed that it lacks the radial spokes but is otherwise structurally normal. Comparison of isolated axonemes of wild type and pf-14 by sodium dodecyl sulfate-acrylamide gel electrophoresis indicated that the mutant is missing a protein of 118,000 mol wt; this protein is apparently a major component of the spokes. Pf-15A and pf-19 lack the central tubules and sheath; axonemes of these mutants are missing three high molecular weight proteins which are probably components of the central tubule-central sheath complex. Under conditions where wild-type axonemes reactivated, axonemes of the three mutants remained intact but did not form bends. However, mutant and wild-type axonemes underwent identical adenosine triphosphate-induced disintegration after treatment with trypsin; the dynein arms of the mutants are therefore capable of generating interdoublet shearing forces. These findings indicated that both the radial spokes and the central tubule-central sheath complex are essential for conversion of interdoublet sliding into axonemal bending. Moreover, because axonemes of pf-14 remained intact under reactivating conditions, the nexin links alone are sufficient to limit the amount of interdoublet sliding that occurs. The axial periodicities of the central sheath, dynein arms, radial spokes, and nexin links of Chlamydomonas were determined by electron microscopy using the lattice-spacing of crystalline catalase as an internal standard. Some new ultrastructural details of the components are described.
Potential involvement of P2Y<sub>2</sub>receptor in diuresis of postobstructive uropathy in rats (2009)

AVP resistance of the medullary collecting duct (mCD) in postobstructive uropathy (POU) has been attributed to increased production of PGE2. P2Y2 receptor activation causes production of PGE2 by the mCD. We hypothesize that increased P2Y2 receptor expression and/or activity may contribute to the diuresis of POU. Sprague-Dawley rats were subjected to bilateral ureteral obstruction for 24 h followed by release (BUO/R, n = 17) or sham operation (SHM/O, n = 15) and euthanized after 1 wk or 12 days. BUO/R rats developed significant polydipsia, polyuria, urinary concentration defect, and increased urinary PGE2 and decreased aquaporin-2 protein abundance in the inner medulla compared with SHM/O rats. After BUO/R, the relative mRNA expression of P2Y2 and P2Y6 receptors was increased by 2.7- and 4.9-fold, respectively, without significant changes in mRNA expression of P2Y1 or P2Y4 receptor. This was associated with a significant 3.5-fold higher protein abundance of the P2Y2 receptor in BUO/R than SHM/O rats. When freshly isolated mCD fractions were challenged with different types of nucleotides (ATPgammaS, ADP, UTP, or UDP), BUO/R and SHM/O rats responded to only ATPgammaS and UTP and released PGE2, consistent with involvement of the P2Y2, but not P2Y6, receptor. ATPgammaS- or UTP-stimulated increases in PGE2 were much higher in BUO/R (3.20- and 2.28-fold, respectively, vs. vehicle controls) than SHM/O (1.68- and 1.30-fold, respectively, vs. vehicle controls) rats. In addition, there were significant 2.4- and 2.1-fold increases in relative mRNA expression of prostanoid EP1 and EP3 receptors, respectively, in the inner medulla of BUO/R vs. SHM/O rats. Taken together, these data suggest that increased production of PGE2 by the mCD in POU may be due to increased expression and activity of the P2Y2 receptor. Increased mRNA expression of EP1 and EP3 receptors in POU may also help accentuate PGE2-induced signaling in the mCD.
Self‐Assembled Monolayers of Mono‐Tetrathiafulvalene Calix[4]pyrroles and Their Electrochemical Sensing of Chloride (2009)

International audience
NIS03-1: Communications Security: Biometrics over Communications Networks (2006)

Biometrics is a technology for authenticating a person's unique identity beyond doubt. Existing popular biometric techniques for ID authentication have relied on a person's photograph and/or fingerprints. However, masters of disguise have repeatedly defeated this type of authentication by temporarily or permanently changing face, voice, appearance and other features of a person in order to accomplish an outlawed objective. Recently, as a result of an increased ID fraud, biometric authentication methods have been advanced to include feature extracted from fingertip(s), palm, iris, face, voice, writing, walking, typing and DNA. However, biometric data authentication requires a robust and encrypted mechanism the data of which is transmitted over a communications network. In general, biometric devices may be considered end devices of an access communications network. Such access network must be capable to handle bandwidth with relatively good security assurance; the most popular access networks today is the wireless GSM and the optical fiber to the premises (FTTP). In this paper, we discuss the biometric processes for identity verification, we describe the key authentication processes in the GSM and in the FTTP optical access networks, cryptographic processes that assure data secrecy between the data source and destination, and the ramifications to biometric data authentication.
Translational applications of hyperpolarized <sup>3</sup>He and <sup>129</sup>Xe (2014)

Clinical magnetic resonance imaging of the lung is technologically challenging, yet over the past two decades hyperpolarized noble gas ((3)He and (129)Xe) imaging has demonstrated the ability to measure multiple pulmonary functional biomarkers. There is a growing need for non-ionizing, non-invasive imaging techniques due to increased concern about cancer risk from ionizing radiation, but the translation of hyperpolarized gas imaging to the pulmonary clinic has been stunted by limited access to the technology. New developments may open doors to greater access and more translation to clinical studies. Here we briefly review a few translational applications of hyperpolarized gas MRI in the contexts of ventilation, diffusion, and dissolved-phase imaging, as well as comparing and contrasting (3)He and (129)Xe gases for these applications. Simple static ventilation MRI reveals regions of the lung not participating in normal ventilation, and these defects have been observed in many pulmonary diseases. Biomarkers related to airspace size and connectivity can be quantified by apparent diffusion coefficient measurements of hyperpolarized gas, and have been shown to be more sensitive to small changes in lung morphology than standard clinical pulmonary functional tests and have been validated by quantitative histology. Parameters related to gas uptake and exchange and lung tissue density can be determined using (129)Xe dissolved-phase MRI. In most cases functional biomarkers can be determined via MRI of either gas, but for some applications one gas may be preferred, such as (3)He for long-range diffusion measurements and (129)Xe for dissolved-phase imaging. Greater access to hyperpolarized gas imaging coupled with newly developing therapeutics makes pulmonary medicine poised for a potential revolution, further adding to the prospects of personalized medicine already evidenced by advancements in molecular biology. Hyperpolarized gas researchers have the opportunity to contribute to this revolution, particularly if greater clinical application of hyperpolarized gas imaging is realized.
Recent patenting activities in the discovery and development of vasopressin V<sub>2</sub>receptor agonists (2012)

The V(2) receptor is currently one of the hottest therapeutic targets investigated for the treatment of urinary disorders such as nocturia and central diabetes. Over the past 10 years, significant progress has been made in the discovery and development of vasopressin V(2) receptor agonists, for the treatment of these disorders. The author anticipates that these agonists will be launched to market in the not-too-distant future.
Some Novel Nematic Materials Bearing Two Lateral Nitrile Functions (1983)

Abstract More than fifty esters of 3‐alkyl‐6‐hydroxy‐1,2‐benzenedicarbonitrile have been prepared. The new esters exhibit stable nematic phases of high negative dielectric anisotropy. The relationship between the clearing points of the esters and the various rings they incorporate is the same as that normally observed for nematic materials of positive dielectric anisotropy.
Channel Selection Under Interference Temperature Model in Multi-Hop Cognitive Mesh Networks (2007)

A cooperative algorithm based on interference temperature model is proposed for computation of available channels by mesh nodes in a cognitive mesh network. Interference temperature model is used to model occupancy and availability of a channel. Link and end-to-end routing metrics are proposed to select appropriate channels from the computed set of available channels.
Reducing the levels of formaldehyde exposure in gross anatomy laboratories (1995)

The new system allows us to comply with safety and health regulations and provide a dissection room with an excellent working environment.
Effects of Dry Grinding on Kaolin Minerals. II. Kibushi-clay (1959)

Abstract The effects of several-hundred-hour mechanical-mortar dry grinding of Kibushi-clay which is a kaolin mineral of fireclay type were studied by X-ray diffraction, thermal, electron microscopic and other methods and compared with those of kaolinite. It has been found that the process of a production of a non-crystalline substance attended with a disordering of a crystalline part and the process of a reaggregation are present in the dry grinding of Kibushi-clay as in kaolinite. Finally, Kibushi-clay changes into an amorphous substance as the result of dry grinding. In a certain stage of grinding, a zeolitic structure is formed. As the grinding progresses, the particle size increases owing to reaggregation. When an amorphous substance like silicaalumina mixed gel is produced, the particle size grows irregularly. In Kibushiclay, the time it takes to become amorphous by dry grinding is shorter than in the case of kaolinite. Consequently, the effects of dry grinding of kaolinite and kaolin mineral of fireclay type depend on the structural perfection of unit layers of the original kaolin minerals.
Controlling Poly(3-hexylthiophene) Crystal Dimension: Nanowhiskers and Nanoribbons (2009)

A study was conducted to investigate crystallization of regioregular poly(3-hexylthiophene) (P3HT) by changing the polymer molecular weight (M n), crystallization temperature, and polymer concentration. It was observed that polymer chains changed from extending to folding in nanowhiskers when the Mn was above a critical value. The fold length was controlled by changing the crystallization temperature. These observations provided the first evidence of P3HT chain folding when it crystallized from solutions. It was also observed that one dimensional (ID) nanowhiskers composed of extended P3HT chains were grown into highly ordered two-dimensional (2D) nanoribbons from more concentrated P3HT solutions, generating a new class of large P3HT crystals. The increased concentration of folded-chain and extended-chain P3HT samples resulted in the formation of gels.
Spontaneous cytotoxicity of murine cells treated with the interferon inducers BRL 5907 and BRL 10739. (1980)

The effects of the polyribonucleotide interferon inducers, BRL 5907 and BRL 10739, on the spontaneous cytotoxicity of CBA mouse cells towards the allogeneic lymphoma EL-4, were investigated. Intravenous administration of BRL 5907 and BRL 10739 increased the cytotoxic activity of a non-adherent, theta-negative, surface immunoglobulin-negative cell present in the spleen, but had no effect on cells in the lymph nodes. Spleen cell cytotoxicity was established within 24 h of injection of the polyribonucleotides, but had disappeared by 4 days. In addition, injection of mice with BRL 10739 increased the spontaneous cytotoxicity of a nylon-wool-adherent, theta-positive spleen cell. Intraperitoneal injection of mice with BRL 5907 and BRL 10739 also enhanced the cytotoxic activity of a non-adherent peritoneal exudate cell.
Ethanol and Estradiol Modulate Alternative Splicing of Dopamine D2 Receptor Messenger RNA and Abolish the Inhibitory Action of Bromocriptine on Prolactin Release From the Pituitary Gland (2003)

Background: Several reports show evidence for the existence of high levels of prolactin (PRL) in alcoholic men and women. Previously we have shown that ethanol increases PRL release both in vivo and in vitro. How ethanol increases PRL release is not well understood. Methods: In this study, we determined the effects of ethanol in the presence and absence of estradiol‐17β on PRL messenger RNA (mRNA) levels, dopamine D2 receptor mRNA splicing, and the PRL‐inhibitory response of a dopaminergic agent, bromocriptine, in the pituitary of Fischer‐344 rats and in primary cultures of anterior pituitary cells. Real‐time reverse transcriptase‐polymerase chain reaction was used for mRNA detection, and radioimmunoassay was used for hormone detection. Results: Estradiol and ethanol alone increased PRL mRNA expression in the pituitary gland. Ethanol also potentiated estradiol action on PRL mRNA expression in the pituitary. Determination of the D2 receptor splicing, by determining the changes in the percentage of D2 receptor mRNA expressed as its long form (D2L) and as its short form (D2S), revealed that both ethanol and estradiol altered D2 receptor splicing. Ethanol and estradiol, alone and together, increased the percentage of the D2L receptor but decreased the D2S receptor percentage. Similarly, ethanol and estradiol alone and in combination increased D2L, but decreased the D2S receptor percentage in primary cultures of pituitary cells. Evaluation of bromocriptine's inhibition of PRL release in primary cultures of pituitary cells indicated that ethanol reduced the ability of this D2 receptor agonist to inhibit PRL release. Conclusions: These results confirm estradiol's inhibition of D2 function and provide novel evidence that ethanol, like estradiol, reduces dopamine's ability to inhibit PRL release by modifying alternative splicing of the dopamine D2 receptor in the pituitary.
THE ACTIVITY COEFFICIENT OF BARIUM HYDROXIDE IN AQUEOUS SOLUTION AT 25° (1932)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE ACTIVITY COEFFICIENT OF BARIUM HYDROXIDE IN AQUEOUS SOLUTION AT 25°Herbert S. Harned and C. Morgan MasonCite this: J. Am. Chem. Soc. 1932, 54, 4, 1439–1442Publication Date (Print):April 1, 1932Publication History Published online1 May 2002Published inissue 1 April 1932https://pubs.acs.org/doi/10.1021/ja01343a022https://doi.org/10.1021/ja01343a022research-articleACS PublicationsRequest reuse permissionsArticle Views78Altmetric-Citations5LEARN 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