gebhart/patrepeval huggingface dataset:
An Improved Technique for Interpreting Perforating-Flow-Laboratory Results: Honoring Observed Cleanup Mechanisms (2012)

Summary Perforating-laboratory experiments can be a useful element of field-perforating-job design. In some instances, the goal is to qualitatively compare multiple candidate perforating techniques. In others, the goal is to obtain quantitative insight into likely flow performance in the field. Although the laboratory will never perfectly replicate the downhole environment, it can yield useful results, which—if properly interpreted—can enable informed prediction of downhole-flow performance. A traditional flow-laboratory experiment (API RP 19B 2006) yields numerous key results, four of which are required inputs to downhole-inflow simulators. These are perforation-tunnel length and diameter, crushed-zone thickness, and permeability. In the case of natural perforated completions as opposed to stimulated completions (e.g., hydraulically fractured or sand control), these parameters (in addition to other system and wellbore parameters) dictate the skin and ultimate flow performance of the completion. Crushed-zone permeability is typically inferred from core-flow efficiency (CFE) and an assumed crushed-zone thickness. Traditionally applied, this technique can yield values that are inaccurate, and can produce misleading predictions of downhole performance more significantly. To address this, we have developed new methods for both measuring and interpreting CFE. The new measurement technique yields CFE values that we show to be more meaningful and relevant. The new interpretation technique provides a consistent method of translating CFE to crushed-zone permeability, and is capable of accounting for the effect of partially plugged tunnels. This work clarifies and improves the link between laboratory and field performance of perforators, with the ultimate goal of increasing the value of downhole-inflow-performance predictions. While other work is ongoing to challenge the framework of the conventional skin models, the present paper accepts these models as a premise. This work simply presents a coherent methodology of interpreting laboratory data, with the intent of generating the required inputs for skin models as they currently exist. Furthermore, it is recommended that this workflow be considered for inclusion in any revisions to the API Section 4 (API RP 19B 2006) testing protocol.
Topography based design of the T-DAB SFN for a mountainous area (1997)

A method for designing a terrestrial digital audio broadcasting single frequency network (T-DAB SFN) for a mountainous region is proposed. A computer database and the digital terrain elevation data are used in designing the network. Two fundamental approaches are compared; first, utilization of the existing transmitter sites is maximized by applying the initial cost constraint; then, the coverage percent of the service is forced to approach to 100% by applying the coverage efficiency constraint. Finally, a T-DAB SFN hybrid design procedure optimizing both constraints is proposed. The three design approaches are illustrated on the coverage of the mountainous Istanbul-Ankara highway. The results are compared using a reference cost look up table. The hybrid approach is shown to optimize the initial cost and the coverage efficiency, and can be applied to similar networking problems.
A Facile Method for Permanent and Functional Surface Modification of Poly(dimethylsiloxane) (2007)

An initiator integrated poly(dimethylsiloxane) (iPDMS) was prepared from a commercially available PDMS by simple mixing and curing, which was then used to realize permanent and functional surface modification via surface-initiated atom transfer radical polymerization.
Sensorless Technique for BLDC Motors (2006)

Commutation is a fundamental feature of all DC machines. In conventional DC machines the commutation function is performed by the commutator and brushes. These act as both position sensors and switches. The mechanical commutator has obvious disadvantages. Overcoming those disadvantages has been a major reason behind the development of brushless DC (BLDC) machines. In brushless DC machines commutation is performed by power electronic devices forming part of an inverter bridge. However, switching of the power electronic devices has to be synchronised with rotor position. Position sensing is therefore an essential requirement. This can be done by using sensors such as Hall Effect devices or a sensorless approach may be adopted. Advantages of sensorless techniques include reduced cost and wiring. The most common sensorless method is based on detection of the zero crossing of back EMF signals. But this technique works only above a certain speed since back EMF is directly proportional to speed. As a result BLDC systems which rely solely on back EMF signals for commutation suffer from relatively poor starting performance characterised by back rotation of up to one hundred and eigthty electrical degrees and large fluctuations in electromagnetic torque resulting from non-ideal commutation instants. This may not be acceptable for some applications and many researchers have attempted to overcome those problems. The aim of this project has been to investigate the possibility of a sensorless technique which does not cost more than the back EMF method but with a performance at start-up comparable with that obtained when Hall sensors are used. Initial investigations led to a saliency based method. Detailed theoretical analysis is presented which shows that the method is insensitive to variations in operational parameters such as load current and circuit parameters such as power device voltage drops and winding resistances. There is a close parallel between it and the back EMF method and this makes it easy to swap to the latter method at high speed if necessary. A starting strategy, relying on saliency related measurements, is proposed which offers starting performance much better than the back EMF method and almost as good as Hall sensor based techniques. Experimental evidence is provided to confirm that commutation instants determined by the proposed method are practically coincident with those obtained when Hall sensors are used.
Update on rhythm mapping and catheter navigation (2011)

Technological developments have occurred rapidly over the past several years. Three-dimensional electroanatomic mapping has proven to be a key tool for the success of complex arrhythmia ablations, especially in patients with congenital heart disease. The integration of imaging technology and arrhythmia mapping technology has greatly enhanced the understanding and visualization of arrhythmias. Remote catheter navigation may become an important tool to improve safety.
Electronic structure, bonding, and properties of copper phosphide, CuP2 (1992)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic structure, bonding, and properties of copper phosphide, CuP2Pere Alemany, Santiago Alvarez, Myung Hwan Whangbo, and Michel EvainCite this: Inorg. Chem. 1992, 31, 1, 119–124Publication Date (Print):January 1, 1992Publication History Published online1 May 2002Published inissue 1 January 1992https://pubs.acs.org/doi/10.1021/ic00027a023https://doi.org/10.1021/ic00027a023research-articleACS PublicationsRequest reuse permissionsArticle Views497Altmetric-Citations10LEARN 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
“When It’s Outside of You” (2021)

Through classroom observations and semi-structured, text-based interviews, this study analyzes the impact of a service-learning first-year composition course on students’ rhetorical knowledge. Students’ own words are used to describe their transformative experiences related to academic writing and community service. As a result of what these students called their “investment” in community organizations, they began to see writing itself as advocacy. This article explains how this commitment to writing as advocacy motivated students to develop transferrable writing knowledge.
Percutaneous transluminal coronary angioplasty (PTCA) combined with stenting improves clinical outcomes compared with PTCA alone in acute myocardial infarction. (2002)

Balloon angioplasty in acute myocardial infarction is an established procedure. The procedure is limited by the potential for early abrupt reocclusion (18-20%) and other complications. Coronary stenting improves the initial success rate, decreases the incidence of abrupt closure, and is associated with a reduced rate of restenosis. For these reasons, coronary stenting is increasingly utilized to treat acute myocardial infarction. The purpose of this study was to compare the effect of coronary stenting with percutaneous transluminal coronary angioplasty (PTCA) in the management of acute myocardial infarction. Clinical data from a retrospective review of 228 consecutive patients admitted with acute myocardial infarction who underwent primary or rescue coronary intervention were used. There was a significantly greater incidence of in-hospital recurrent myocardial infarction in the PTCA group (10%) versus the stented group (1%). In the PTCA cohort, 10 patients required in-hospital repeat revascularization by PTCA compared with one patient in the stented group. The in-hospital death rate was significantly higher in the PTCA group (8%) compared with the stented group (1%). There was no significant difference in the incidence of postdischarge death or repeated revascularization. The results suggest that patients who undergo PTCA with stent deployment have fewer episodes of in-hospital recurrent angina, myocardial infarctions, repeat angioplasties, and fewer in-hospital deaths. PTCA with stenting was associated with a low in-hospital mortality (1%). For patients who had PTCA alone and survived to be discharged, there was no significant difference in overall mortality or the need for revascularization over the 2-year follow-up period.
A note on bidifferential calculi and bihamiltonian systems (2004)

summary:In this note we discuss the geometrical relationship between bi-Hamiltonian systems and bi-differential calculi, introduced by Dimakis and Möller–Hoissen.
Channel cross-coupling in a polymer-based single-mode bus array (1995)

In this paper, a crosstalk model is developed to study the packing density and interconnect distance limitations of an optical interconnect system employing polymer-based single-mode bus arrays. The upper limit of channel packing density (1250 channels/cm at interconnect distance of 5 cm) is determined for the first time using the crosstalk model, in which channel cross-coupling among an infinite number of waveguides is considered. Computer simulations are provided together with the proven experimental results. It is shown that there is a threshold of channel separation due to channel cross-coupling, which results in a tradeoff between channel packing density and interconnect distance. Waveguide dimension closer to the cutoff boundary of second mode (E/sub 12//sup x/) is preferred for an optimum design.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Cultivation of a pig parvovirus in various cell cultures. (1987)

The susceptibility of several established cell lines of pig (LLC-PK1 = pig kidney; MPK = minipig kidney; PK15 = pig kidney; ESK = embryonic swine kidney), bovine (EBTr = embryonic bovine trachea), monkey (MA-104 = fetal rhesus monkey kidney) and human (HEL-299 = embryonic human lung) origin to porcine parvovirus was studied. The primary pig kidney cell cultures (pPK) were included in the study as the reference cell system. From the results it appeared that the virus only replicated in cell lines originated from swine. In particular the MPK and ESK cell lines showed a susceptibility similar to that observed for pPK cell cultures. Intranuclear inclusions and plaques were also induced in these cell systems. It appeared therefore that MPK and ESK cell lines both possess all the requirements for use in pig parvovirus studies.
계지복령환(桂枝茯苓丸)이 흰쥐의 골절유합에 미치는 영향 (2019)

Objectives The object of this study was to assess the effect of Gyejibokryunghwan (GBH) on anti-oxidant and anti-inflammatory activities in RAW 264.7 cells and on factors associated with fracture union in tibia-fractured rats.
Methods The 1,1-diphenyl-2-picryl-hydrazyl (DPPH) radical scavenging activity was measured to assess anti-oxidant activity. The production of nitric oxide (NO), interleukin- 6 (IL-6), interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) in the RAW 264.7 cells were measured to assess anti-inflammatory activity. The production of osteocalcin, calcitonin, carboxy-terminal telepeptides of type II collagen (CTXⅡ), transforming growth factor-β (TGF-β), bone morphogenetic protein-2 (BMP-2) in serum of tibia-fractured rats were measured to assess the effects of fracture union. X-rays were taken every two weeks from 0 to 4th week to assess fracture union effect.
Results DPPH radical scavenging activity of GBH was increased according to concentration of GBH in RAW 264.7 cell. NO, prostaglandin E2 (PGE2), IL-6, IL-1β and TNF-α were significantly decreased, indicating anti-inflammatory effect. Osteocalcin, calcitonin, TGF-β were significantly increased in the experimental groups. CTXⅡ was significantly decreased in the experimental groups. BMP-2 was not significantly changed in the experimental groups. The X-ray showed that the experimental group has better healing effects on tibia-fractured rats than control group.
Conclusions From above result, GBH has an effect on anti-oxidant, anti-inflammatory activities in RAW 264.7 cells. GBH showed significant results in factors related with fracture union and radiologic examination. In conclusion, GBH can help fracture union and it well be expected to be used actively in clinics. (J Korean Med Rehabil 2019; 29(4):1-14)
Conformational Study of Phospholipids in Crystalline State and Hydrated Bilayers by <sup>13</sup>C and <sup>31</sup>P CP-MAS NMR (1997)

Crystalline forms of the racemic and enantiomerically pure saturated zwitterionic phospholipids, phosphatidylcholine (PC), phosphatidylethanolamine (PE), phosphatidyl-N-methylethanolamine (PEM1), and phosphatidyl-N,N-dimethylethanolamine (PEM2) have been investigated using 13C and 31P cross-polarization magic angle spinning (CP-MAS) NMR. The observed spectra indicate two types of packing behavior depending on the optical purity of phospholipids and the structure of a head group. The crystalline lattices of the enantiomerically pure PC, PE, PEM1, and PEM2 contained two conformations, whereas the corresponding racemic phospholipids contained only a single conformational species. On the basis of the known crystal structures of phospholipids, these results can be explained in terms of different ways the various zwitterionic phospholipids achieve packing into lattices with a minimal residual dipole moment. In enantiomerically pure PC and PE, the presence of two conformations, combining one configurational isomer of the diacyl glycerol moiety with two conformational mirror images of the head group, is necessary to eliminate the residual in-plane dipole moment of head groups and still achieve tight packing of the chiral diacylglycerol residue. In racemates, the in-plane dipole moment is eliminated by packing a single conformation into a true centrosymmetric lattice. The hydration of the crystalline phospholipid samples produced significant spectral alterations such as changes in the 13C chemical shifts of the diacylglycerol C2 carbon and carbonyl groups, and 31P NMR signals, suggesting conformational changes. The hydrated bilayers of both racemic and enantiomerically pure dipalmitoyl PC (DPPC) gave rise to identical 13C NMR spectra regardless the phase state, except for the most rigid Lc subgel phase. The invariance of chemical shifts in these gel phases indicated that no major conformational changes occurred during phase transitions of hydrated bilayers of PC. The NMR data presented in this work provide evidence that conformations of phospholipids in the crystalline state are strongly affected by packing forces and the tendency of the head groups to pack in true- or quasi-centrosymmetric lattices. On the other hand, conformations in hydrated bilayers are largely governed by the intrinsic conformational properties of monomeric molecules. The data presented address the problem of the relevance of the X-ray structures of crystalline phospholipids for evaluation of the conformations in the less ordered hydrated bilayers.
VGuard: A distributed denial of service attack mitigation method using network function virtualization (2015)

Distributed denial of service (DDoS) attacks have caused tremendous damage to ISPs and online services. They can be divided into attacks using spoofed IPs and attacks using real IPs (botnet). Among them the attacks from real IPs are much harder to mitigate since the attack traffic can be fabricated to be similar to legitimate traffic. The corresponding DDoS defence strategies proposed in past few years have not been proven to be highly effective due to the limitation of participating devices. However, the emergence of the next generation networking technologies such a network function virtualization (NFV) provide a new opportunity for researchers to design DDoS mitigation solutions. In this paper we propose VGuard, a dynamic traffic engineering solution based on prioritization, which is implemented on a DDoS virtual network function (VNF). The flows from the external zone are directed to different tunnels based on their priority levels. This way trusted legitimate flows are served with guaranteed quality of service, while attack flows and suspicious flows compete for resources with each other. We propose two methods for flow direction: the static method and the dynamic method. We evaluated the performance of both methods through simulation. Our results show that both methods can effectively provide satisfying service to trusted flows under DDoS attacks, and both methods have their pros and cons under different situations.
Immunological and Biological Properties of Bet v 4, a Novel Birch Pollen Allergen with Two EF-hand Calcium-binding Domains (1997)

We have isolated a cDNA clone coding for a birch pollen allergen, Bet v 4. The deduced amino acid sequence of Bet v 4 contained two typical EF-hand calcium-binding domains. Sequence similarities of Bet v 4 to calmodulin are primarily confined to the calcium-binding domains. However, significant sequence similarities extending outside the Ca2+-binding sites were found with a recently described group of pollen-specific allergens of Brassica and Bermuda grass. Both EF-hand domains of Bet v 4 are able to bind Ca2+, as demonstrated by 45Ca2+ blot overlay of wild type and calcium-binding deficient mutants of Bet v 4. Among pollen-allergic patients, protein-bound Ca2+ was not an absolute requirement for IgE recognition of Bet v 4. However, disruption of the carboxyl-terminal Ca2+-binding domain indicated that most IgE antibodies from allergic patients are directed against this site. IgE inhibition experiments suggested that Bet v 4 represents a highly cross-reactive pollen allergen. Pre-absorption of allergic sera with Bet v 4 drastically reduced IgE binding to proteins of similar molecular weight in pollen extracts from distantly related plant species (e.g. timothy grass, mugwort, lily) but not in extracts from plant-derived foodstuff. To test for a possible biological role in pollen germination and tube growth, we introduced recombinant Bet v 4 protein into growing lily pollen tubes by iontophoresis. As a result, cytoplasmic streaming stopped in the vicinity of the electrode tip, and a slight depolarization of the membrane voltage was measured. These effects were not observed with Ca2+-binding deficient mutants of Bet v 4. Thus, Bet v 4 and homologous proteins represent a new class of pollen-specific Ca2+-binding allergens that may have a physiological role as inhibitors of cytoplasmic streaming in outgrowing pollen tubes.
[Squamous cell carcinoma, basal cell carcinoma]. (1993)

In Japan the regimen with peplomycin has been mainly used for the treatment of squamous cell carcinoma (SCC). But recently, a regimen with cisplatin, particularly the combination of cisplatin and adriamycin (CA chemotherapy) has been used for the treatment of SCC, and a better prognosis has resulted Since CA chemotherapy is very effective for not only SCC, but also basal cell carcinoma (BCC), we think it is a prominent neoadjuvant therapy for SCC and BCC. We have used CA chemotherapy for multiple lung metastasis of BCC over the past six years, and three times PR was obtained, with survival so far.
Attaching knowledge to product model for representation of human intent (2002)

In the globalized industry, product models are transferred between CAD/CAM systems. An engineer needs information about intention of the engineer who has created the model at a remote workstation. Present day geometric and form feature models of mechanical parts offer only restricted description of human intent. There are efforts to improve models in this direction. The authors propose a methodology for attaching information and knowledge to geometric and form feature models for improving communication between product designer and production engineer. The paper is organized as follows. First, product modeling and production planning procedures are analyzed from the point of view of need for auxiliary model information to be transferred between product designers and manufacturing engineers. Next, product models and their information description capabilities are explained and possibility for description of designer intent and experience in these models are presented. Following this, representation and processing of human intents are described. Finally characteristics and advantages of communication between engineers using the extended models are concluded.
Cryptographic keys generation using identity (2011)

Public key cryptography is a fundamental and widely used technology around the world for secure information exchange over Internet. Public key cryptography uses public key of the receiver to encrypt the message and receiver uses his/her private key to decrypt the message. Public key of receiver is known publicly, prior to the communication. Hence the authentication of the public key is a big challenge and for which public key certificates, provided by Certification Authority (CA), are used. At large scale communication to set up numerous CA"s is a major overhead of public key cryptography. Hence this paper attempts to avoid the use of public key certificates and proposes an RSA based algorithm to generate the cryptographic keys using identity such as E-Mail ID of a person. The algorithm uses a hash function to generate the keys. The simulation results for key generation using various hash functions are also shown in paper.