gebhart/patrepeval huggingface dataset:
A calibration and measurement method of a tri-six-port network analyzer suitable for on-wafer characterization of three-port devices (1993)

A calibration and measurement method using a wideband tri-six-port network and analyzer (TSPNA) is proposed. The scattering parameters of a three-port device under test are found to be the unknowns of a set of nine simultaneous complex linear equations. These equations are established via a group of three calibrated linearly independent excitations. No isolators are required for calibration and measurement procedures. Three unknown reciprocal two-port standards are needed for the calibration of the TSPNA. The proposed method is rigorous, explicit, and suitable for wideband on-wafer three-port device S-parameter measurements. It can easily be adapted for heterodyne automated network analyzers equipped with three reflection test-set units.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>
Development of a reconfigurable underwater acoustic networking testbed (2012)

We present our ongoing work on developing a reconfigurable underwater acoustic (UW-A) networking testbed based on the Teledyne Benthos Telesonar SM-75 modem [1]. The SM-75 modem is customized to allow the research community to conduct advanced networking and communication experiments as follows. First, a programmable Gumstix [2] network processor is integrated with the SM-75 modem, as shown in Fig. 1(a), through a newly designed interface that defines communication primitives between the modem board and the external processor. A reconfigurable, software-defined protocol stack, including medium access control (MAC), IP network layer with reconfigurable ad hoc routing, network self-configuration primitives is being implemented on the Gumstix board to enable the definition of complex networking experiments with reconfigurable, cross-layer designed protocol stacks [4]. Second, the modified platform is designed such that it allows generating, transmitting and receiving custom defined acoustic waveforms to support reconfigurable physical layer experimentation with arbitrary transmission schemes. Finally, we discuss integration of the testbed with an UW-A channel emulator we developed that allows the user to perform laboratory controlled experiments.
Characterization of the cyclic deformation behaviour and fatigue crack initiation on titanium in physiological media by electrochemical techniques (2004)

Abstract In the present work, the cyclic deformation behaviour as well as fatigue crack initiation processes of commercially pure (cp) titanium grade 2 were characterized in axial single step and stepwise load increase tests by mechanical hystereses, corrosion potential and current measurements. Scanning electron microscopic investigations were used to correlate fatigue induced surface damages with the results of electrochemical investigations. Potential measurements proved to be very sensitive to indicate surface damages in situ at the very beginning. The corrosion potential is strongly related to the development of the plastic strain amplitude. Thus, cyclic softening and hardening processes are represented by a characteristic decrease and increase of the potential curve. Current measurements are less sensitive, but allow a detailed characterization of crack propagation processes.
Age-dependent partnering and the HIV transmission chain: a microsimulation analysis (2013)

Efficient planning and evaluation of human immunodeficiency virus (HIV) prevention programmes requires an understanding of what sustains the epidemic, including the mechanism by which HIV transmission keeps pace with the ageing of the infected population. Recently, more detailed population models have been developed which represent the epidemic with sufficient detail to characterize the dynamics of ongoing transmission. Here, we describe the structure and parameters of such a model, called EMOD-HIV v. 0.7. We analyse the chains of transmission that allow the HIV epidemic to propagate across age groups in this model. In order to prevent the epidemic from dying out, the virus must find younger victims faster than its extant victims age and die. The individuals who enable such transmission events in EMOD-HIV v. 0.7 are higher concurrency, co-infected males aged 26-29 and females aged 23-24. Prevention programmes that target these populations could efficiently interrupt the mechanisms that allow HIV to transmit at a pace that is faster than the progress of time.
Supplementary Figure 6 from Fibroblast Growth Factor Receptor 4 Regulates Tumor Invasion by Coupling Fibroblast Growth Factor Signaling to Extracellular Matrix Degradation (2023)

Supplementary Figure 6 from Fibroblast Growth Factor Receptor 4 Regulates Tumor Invasion by Coupling Fibroblast Growth Factor Signaling to Extracellular Matrix Degradation
Conservation of the gene for outer membrane protein OprF in the family Pseudomonadaceae: sequence of the Pseudomonas syringae oprF gene (1991)

The conservation of the oprF gene for the major outer membrane protein OprF was determined by restriction mapping and Southern blot hybridization with the Pseudomonas aeruginosa oprF gene as a probe. The restriction map was highly conserved among 16 of the 17 serotype strains and 42 clinical isolates of P. aeruginosa. Only the serotype 12 isolate and one clinical isolate showed small differences in restriction pattern. Southern probing of PstI chromosomal digests of 14 species from the family Pseudomonadaceae revealed that only the nine members of rRNA homology group I hybridized with the oprF gene. To reveal the actual extent of homology, the oprF gene and its product were characterized in Pseudomonas syringae. Nine strains of P. syringae from seven different pathovars hybridized with the P. aeruginosa gene to produce five different but related restriction maps. All produced an OprF protein in their outer membranes with the same apparent molecular weight as that of P.aeruginosa OprF. In each case the protein reacted with monoclonal antibody MA4-10 and was similarly heat and 2-mercaptoethanol modifiable. The purified OprF protein of the type strain P. syringae pv. syringae ATCC 19310 reconstituted small channels in lipid bilayer membranes. The oprF gene from this latter strain was cloned and sequenced. Despite the low level of DNA hybridization between P. aeruginosa and P. syringae DNA, the OprF gene was highly conserved between the species with 72% DNA sequence identity and 68% amino acid sequence identity overall. The carboxy terminus-encoding region of P. syringae oprF showed 85 and 33% identity, respectively, with the same regions of the P. aeruginosa oprF and Escherichia coli ompA genes.
Protection of the Internal Mammary Artery Pedicle with Polytetrafluoroethylene Membrane (1993)

With increasing frequency, reoperative coronary artery bypass surgery is being performed in the setting of a patent internal mammary artery (IMA) graft. Injury to the IMA graft at reoperation can result in ischemic myocardial injury and cardiac arrest. This descriptive laboratory study examined use of a polytetrafluoroethylene (PTFE) membrane wrap to protect the IMA pedicle during sternal reentry. Six pigs (25-30 kg) underwent median sternotomy and takedown of left and right IMAs. Grafts were implanted in the epicardium by a modified Vineberg procedure. In each animal, one IMA was wrapped circumferentially with PTFE, while the contralateral bare IMA served as the control. Redo sternotomy was performed 3 months later. Severe adhesions between chest wall, myocardium, and bare IMA grafts were encountered in six of six animals. PTFE-wrapped IMAs were easily identified by appearance and by palpation. There was no adherence between PTFE membranes and surrounding tissue, nor was there evidence of cellular infiltration, disruption, or contraction of the membrane. Most notably, PTFE membranes could not be cut or injured with the electrocautery, since they are electrical nonconductors. This study demonstrates that PTFE membrane: (1) is relatively inert and incites minimal surrounding tissue reaction; and (2) is impenetrable to electrocautery injury. Further studies are necessary to determine the impact of PTFE membrane on IMA graft patency and wound infection. PTFE membrane may prove clinically useful in protecting patent IMA pedicles during reoperative cardiac surgery.
A broadband switching experiment (1988)

Abstract A broadband switching experiment was presented at the ISS'87 and Telecom'87 conferences in Phoenix, Arizona, and Geneva, Switzerland, respectively and at the March 1988 Fair in Hanover, West Germany. This experiment was significant in that it illustrated techniques for switching broadband signals with a wide range of frequencies, formats and ultimate purposes. In particular, simultaneous switching (within the same switch fabric) of 30 MHz PFM, 45 Mb/s PCM, and 140 Mb/s PCM was demonstrated. These signals carried full‐motion, full‐colour NTSC video for desk‐to‐desk video teleconferencing, off‐the‐air broadcast video programming, and surveillance camera video. They also carried RGB video, digitized stored video images, and computer‐computer communications. Software features afforded a friendly human interface, allowing multiple, flexible service capabilities. Further, the experimental system, when deployed in Phoenix, demonstrated control of its capabilities via a narrowband ISDN link to an optically remoted 5ESS® switch module one km distant, which homed on a 5ESS host switch about 32 km further away. The technologies employed in the switch and the surrounding equipment are detailed, and the significance of this experiment relative to the broadband ISDN (BISDN) thinking is discussed.
Low-field microwave absorption and flux quantisation in Y1Ba2Cu3Oy (1988)

Two groups of features with different time evolution characteristics can be identified in the low-field microwave absorption signal in ceramic Y1Ba2Cu3Oy. One set of features has its origin in the flux reconfiguration in a magnetically viscous medium while the second set of features arise from the flux quantisation through the random Josephson current network. The periodicity and existence of these features cannot be explained by the usual concepts of randomness in superconducting network models.
NHC-Boranes: Air- and Water-tolerant Co-initiators for Type II Photopolymerizations (2012)

N-Hetereocyclic carbene (NHC) complexes of boranes are stable compounds that can be used as co-initiators for the type II photopolymerization of acrylates. The present account summarizes this new development for polymerization and boron chemistry. In particular, NHC-boranes are air- and water-tolerant, which enhances the practicality of the photopolymerizations.
Enabling Dynamically Centralized RAN Architectures in 5G and Beyond (2021)

In order to deliver the high data rates promised for 5G networks, mobile base stations need to be deployed in dense layouts. This results in increased inter-cell interference, which can be mitigated by leveraging centralized architectures in radio access networks. Nonetheless, centralizing all the processing requires prohibitively high link capacities for the fronthaul network connecting centralized and distributed units. In contrast, a static, partially-centralized architecture yields poor performance as it fails to adapt to instantaneous interference situations. In this work, we show that a dynamically centralized architecture enables drastic interference reductions even when using a very limited fronthaul network. We propose multiple algorithms to find the optimal centralization option and evaluate their performance on operator-grade hardware. In addition, owing to the dynamicity of the problem being solved, we provide a framework to decide on the best algorithm based on the trade-off between performance, cost, and adaptation time.
Inhibitor Screening of Proprotein Convertases Using Positional Scanning Libraries (2011)

Proprotein convertases represent an important class of biosynthetic enzymes that are increasingly viewed as targets for therapeutic approaches to infection, cancer, and potentially endocrine disorders. The identification of potent inhibitors can be accomplished by screening synthetic combinatorial libraries containing thousands of small molecules to millions of peptides. In this chapter, the screening of positional scanning libraries is described for the identification of PC1/3 and PC2 inhibitors.
Informatics: An essential nursing career (2023)

These experts support nurses’ patient care delivery.
Equalization of pulse timings in an excitable microlaser system with delay (2020)

The authors provide experimental evidence that an excitable microlaser with delayed optical feedback is unable to regenerate pulses by the excitable response of the laser. Rather, the paper shows that the system settles down to a stable periodic orbit with equalized timing between pulses.
Construções geométricas no GeoGebra (2017)

A geometria de superficies, em geral, e pouco explorada na formacao do professor de matematica e, nem sempre, sao indicadas aplicacoes, como e o caso da banda de Moebius, a qual apresenta inumeras aplicacoes como na psicanalise estudada por Lacan, nas obras literarias de Calvino, na arquitetura em construcao de pontes, casas, moveis, etc. E fato notavel que o advento da geometria dinâmica, com os processos visuais, tornaram mais acessiveis para visualizacao objetos espaciais. Particularmente, surgiu e se consagrou no meio academico o GeoGebra, o qual, na versao 5.0, apresenta a possibilidade de exploracao 3D. Neste minicurso pretende-se trazer algumas consideracoes a respeito das aplicacoes da banda a fim de utilizar as ferramentas do software para estudar orientabilidade, curvas obtidas sobre a mesma, o triedro movel: vetor tangente, normal e binormal, em movimentos, permitindo visualizacao e variacao da orientacao. Por meio de atividades previamente elaboradas os participantes terao oportunidade de realiza-las em laboratorio de informatica, podendo vir a ser recurso para professores e futuros professores em diversas disciplinas como calculo, geometria e geometria analitica, por exemplo. Durante o ano de 2016 o GEPGEO dedicou-se a aplicacoes da Topologia em nivel de formacao de professores de matematica.
A Computational Platform Integrating a Mechanistic Model of Crohn’s Disease for Predicting Temporal Progression of Mucosal Damage and Healing (2022)

Hybrid computational tools including mechanistic components represent a promising form of decision support that can predict outcomes and patient progress in Crohn's disease.
A Highly Compact 1W Ku-Band Power Amplifier (2022)

This paper presents a highly compact double-balanced two-stage Ku-Band SiGe power amplifier. Four power cells are combined in a balanced architecture which occupies less than 2mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . As a proof of concept, the power amplifier was designed with a 0.13-μm SiGe BiCMOS technology. The simulated performances at 18GHz exhibit a saturated power higher than 30dBm up to 90°C, a linear gain of 21.2dB and a peak power added efficiency of 26.5%.
Retroviral gene transfer, rapid selection, and maintenance of the immature phenotype in mouse dendritic cells (1999)

We used the retroviral vector PINCO [which expresses the green fluorescent protein (GFP) as a selectable marker], to infect growth factor-dependent immature D1 dendritic cells (DC). The efficiency of infection in different experiments was between 5 and 30%, but subsequent cell sorting led to a virtually homogeneous population of GFP-positive cells. Retroviral infection did not modify the immature DC phenotype, as shown by the low expression of major histocompatibility complex and co-stimulatory molecules. Furthermore, the GFP-positive D1 cells underwent full maturation after lipopolysaccharide treatment, as indicated by a high expression of cell-surface MHC and co-stimulatory molecules, and also by strong stimulatory activity in allogeneic mixed lymphocyte reaction. The high efficiency of this retroviral system, the rapidity of the technique, and the possibility to overcome in vitro selection make this method very attractive for the stable introduction of heterologous genes into proliferating immature mouse D1 cells. Furthermore, this approach is suitable for functional studies of new DC-specific genes involved in DC maturation and survival.
Prevalence and Causes of Visual Impairment in Italy (1994)

This Italian study, based on the National Household Health Survey (NHHS), the Registry of the Blind and the Welfare lists of the Ministry of the Interior, was designed to estimate the prevalence of blindness and hypovision in Italy and describe its geographical distribution. In addition, a national sample of 29 763 Registry members was studied to describe causes of blindness. The prevalence from NHHS data was 4.3 per 1000 in 1983 and 4.5 in 1986-1987 (3.2 in the North, 4.6 in the Centre, 6.5 in the South). Welfare recipients were 112,783 in 1988, a prevalence of 2.0 per 1,000, but were fewer in Northern than in Southern regions (range 0.7-4.8). The Registry of the Blind had 80,918 members in 1984 (prevalence 1.4 per 1,000) and 106,000 in 1989 (prevalence 1.9): < 1 per 1,000 in the North and > 3 in the South. The most frequent causes of blindness among Registry members were retinal diseases (33%) and cataract (23%). The causes of preventable blindness were more frequently reported in Southern than in Northern Italy.
Sequence of a DNA injection gene from Salmonellatyphimuriumphage P22 (1993)

Journal Article Sequence of a DNA injection gene from Salmonella typhimurium phage P22 Get access Pratima Adhikari, Pratima Adhikari Department of Biological Sciences, Carnegie Mellon University4400 Fifth Avenue, Pittsburgh, PA 15213, USA Search for other works by this author on: Oxford Academic PubMed Google Scholar Peter B. Berget Peter B. Berget Department of Biological Sciences, Carnegie Mellon University4400 Fifth Avenue, Pittsburgh, PA 15213, USA Search for other works by this author on: Oxford Academic PubMed Google Scholar Nucleic Acids Research, Volume 21, Issue 6, 25 March 1993, Page 1499, https://doi.org/10.1093/nar/21.6.1499 Published: 25 March 1993 Article history Received: 07 December 1992 Accepted: 11 December 1992 Published: 25 March 1993
Aspects of hydrogen activation in propene polymerization using MgCl2/TiCl4/diether catalysts (1996)

Abstract 13 C NMR analysis of the chain‐end distribution of poly(propylenes) prepared using the highly active catalyst system MgCl 2 /TiCl 4 /diether—AlEt 3 has revealed particularly high proportions of butyl chain‐ends in polymers prepared at relatively low hydrogen pressures. This indicates that the high sensitivity of this type of catalyst to hydrogen, both with respect to catalyst activity and polymer molecular weight, can largely be ascribed to chain transfer following regioirregular (2,1‐) insertion, such an insertion leading to a species having low activity in chain propagation. Isotactic stereoregularity increases with increasing hydrogen pressure, indicating that a stereoirregular insertion may also slow down the chain propagation, again leading to chain transfer and resulting in the conversion of a potential chain defect into an isobutyl chain‐end. Analysis of highly isotactic polymer fractions isolated via temperature rising elution fractionation revealed the presence of both butyl and isobutyl chain‐ends, indicating that even the most highly stereo‐specific sites in MgCl 2 ‐supported catalysts are not totally regiospecific.
Oil Recovery Improvement Using CO2-Enriched Water Injection (2009)

Abstract CO2 injection is increasingly considered as having potential applications as a possible enhanced oil recovery (EOR) process for oil reservoirs. However, poor sweep efficiency has been a problem in many CO2 floods and hence, the injection strategies like WAG (water-alternating-gas) injection have been proposed and applied in the field as a way to mitigate the problem. An alternative injection strategy is CO2-enriched (carbonated) water injection (CWI). This paper presents the results of an integrated experimental and theoretical study on the application of CO2-enriched water flooding for enhanced oil recovery. Direct flow visualisation experiments were carried out using high-pressure transparent porous media. The results of our visualisation experiments demonstrate that CWI, compared to unadulterated water injection, improves oil recovery. The additional oil is recovered as a result of an improved sweep efficiency, due to the oil swelling, viscosity reduction and coalescence of the isolated oil ganglia as a result of CO2 diffusion. This injection strategy is particularly attractive in waterflooded oil reservoirs in which high water saturation adversely affects the performance of conventional CO2 injection methods. CWI can also be carried out in combination with reservoir depressurisation carried out subsequent to CWI or in a cyclic manner in which carbonated and plain water cycles are injected in succession. The results of a mathematical model are also presented which honours our experimental observations and simulates the dynamic process of oil swelling and shrinkage due to CO2 transfer during Carbonated water and plain water injection.
Female Sexual Function Following Radical Cystectomy in Bladder Cancer (2022)

Female sexual dysfunction is associated with high levels of patient distress and is best comanaged with a multidisciplinary treatment approach, including preoperative counseling, intraoperative nerve, and organ preservation, and postoperative interventions to mitigate sexual side effects. Davis L, Isali I, Prunty M, et al. Female Sexual Function Following Radical Cystectomy in Bladder Cancer. Sex Med Rev 2022;10:231-239.
Opioid/sphingosine‐1‐phosphate1 (S1P1) interactions in antinociception (2012)

The antinociceptive effects of morphine are mediated in part by activation of the S1P1 receptor as indicated by attenuation of morphine‐induced antinociception by a S1P1 receptor antagonist VPC44116 in mice. In addition, as tested in SphK 2 knockout mice, activation of sphingosine kinase 2 , the kinase responsible (along with SphK 1 ) in the phosphorylation and activation of S1P is required for the fully efficacious effect of morphine in antinociceptive testing in mice. The antinociceptive effects of morphine are enhanced by the administration of subactive doses of the S1P analog FTY720 (fingolimod) and the S1P1 receptor‐selective drug, CYM‐ 5442. Morphine‐induced antinociception and G‐protein activation via [ 35 S]GTPγS autoradiography in several brain regions are not attenuated in FTY720‐tolerant mice. Thus, S1P and opioid receptors appear to have distinct receptor signaling systems. However, these data indicate that opioid and S1P1 receptor‐activated processes are highly dependent upon one another in the production of antinociception. The Presidential Research Incentive Grant (VCU) and NIDA RO3DA‐05274 supported this work.