gebhart/patrepeval huggingface dataset:
Bis‐, tris‐, and tetrakis‐maleimidophenoxy‐triphenoxycyclotriphosphazene resins for fire‐ and heat‐resistant applications (1983)

Abstract Novel fire‐ and heat‐resistant polymers was obtained by the thermal polymerization of various maleimidophenoxy‐triphenoxycyclotriphosphazenes. These polymers, in which the cyclic triphosphazene structure is preserved, have thermal stability to 350°C and char yields of 82–78% at 800°C in nitrogen and 78–71% at 700°C in air. Two groups of monomers were synthesized by reacting tris(4‐aminophenoxy)‐tris(phenoxy)cyclotriphosphazene with maleic anhydride alone or in combination with benzophenonetetracarboxylic or pyromellitic dianhydride. The structures of cyclic phosphazene‐trimeric precursors and the polymers were characterized by Fourier‐transform infrared, proton nuclear magnetic resonance, and elemental analysis. The thermal stabilities of the polymers were evaluated by thermogravimetric analysis.
NMR based real-time enzyme kinetics on estimating the inhibitory effect of sucralose in the enzymatic conversion of sucrose (2020)

Sucralose, one of the popular non-caloric artificial sweeteners, has been known to influence the enzymatic conversion of sucrose to glucose and fructose by invertase. In continuing the use of real-time NMR experiments and reaction progress curve analysis to measure enzyme kinetics, here we investigate the role of sucralose as an inhibitor. NMR based kinetic experiments were performed as a function of the substrate concentration for a range of sucralose concentrations, and the results were analyzed by fitting the progress curve to the Lambert-W function. The Michaelis-Menten parameters were then used to estimate the inhibitory constant of sucralose. To estimate the extent of sucralose inhibition on the enzymatic production of glucose, control experiments were performed with lactose as the inhibitor under similar experimental conditions. The results show that sucralose is a much more potent inhibitor than lactose, inhibiting the enzymatic conversion at least seven times more.
Universal and mutation-resistant anti-enteroviral activity: potency of small interfering RNA complementary to the conserved cis-acting replication element within the enterovirus coding region (2007)

The promising potential of RNA interference-based antiviral therapies has been well established. However, the antiviral efficacy is largely limited by genomic diversity and genetic instability of various viruses, including human enterovirus B (HEB). In this work, the first evidence supporting the anti-HEB activity of the small interfering RNA (siRNA) targeting the highly conserved cis -acting replication element (CRE) within virus coding region 2C is presented. HeLa cells pre-treated with siRNA complementary to the conserved sequence of the loop region of CRE(2C) were effectively rescued from the cytopathic effects of HEBs. Downregulation of virus replication and attenuation of cytotoxicity were consistently observed in various reference strains and clinical isolates. Cells treated with this siRNA were resistant to the emergence of viable escape mutants and showed sustained antiviral ability. Collectively, the data suggest that the siRNA based on the disordered structure within the highly conserved cis -acting coding region has potential as a universal, persistent anti-HEB agent. The same strategy can be successfully applied to the development of siRNA with consistent antiviral effects in other virus groups possessing similar RNA elements.
Selective carbon monoxide adsorbent composed of polystyrene resin having amino groups and copper(I) chloride (1986)

Abstract A carbon monoxide adsorbent composed of 10 g of a polystyrene resin having amino groups and 70 mmol of copper(I) chloride was prepared by refluxing the resin and copper(I) chloride in acetonitrile, followed by evaporation of the liquid phase at 5 mmHg, 80°C. The adsorbent rapidly adsorbs 15.9 mmol of carbon monoxide under 1 atm at 20°C. 11.4 mmol of adsorbed carbon monoxide are desorbed when the adsorbent is subjected to a reduced pressure (5 mmHg) at 80°C for 10 min. In the second and the later adsorptions, the amount of adsorbed carbon monoxide is virtually constant at 11.4 mmol. The amount of carbon dioxide adsorbed by the adsorbent under 1 atm at 20°C is 2.8 mmol, and the value for methane is 0.0 mmol. The prepared adsorbent is applicable to selective separation of carbon monoxide from gas mixtures containing both carbon dioxide and methane.
Scatter correction for cone‐beam CT in radiation therapy (2009)

Cone-beam CT (CBCT) is being increasingly used in modern radiation therapy for patient setup and adaptive replanning. However, due to the large volume of x-ray illumination, scatter becomes a rather serious problem and is considered as one of the fundamental limitations of CBCT image quality. Many scatter correction algorithms have been proposed in literature, while a standard practical solution still remains elusive. In radiation therapy, the same patient is scanned repetitively during a course of treatment, a natural question to ask is whether one can obtain the scatter distribution on the first day of treatment and then use the data for scatter correction in the subsequent scans on different days. To realize this scatter removal scheme, two technical pieces must be in place: (i) A strategy to obtain the scatter distribution in on-board CBCT imaging and (ii) a method to spatially match a prior scatter distribution with the on-treatment CBCT projection data for scatter subtraction. In this work, simple solutions to the two problems are provided. A partially blocked CBCT is used to extract the scatter distribution. The x-ray beam blocker has a strip pattern, such that partial volume can still be accurately reconstructed and the whole-field scatter distribution can be estimated from the detected signals in the shadow regions using interpolation/extrapolation. In the subsequent scans, the patient transformation is determined using a rigid registration of the conventional CBCT and the prior partial CBCT. From the derived patient transformation, the measured scatter is then modified to adapt the new on-treatment patient geometry for scatter correction. The proposed method is evaluated using physical experiments on a clinical CBCT system. On the Catphan 600 phantom, the errors in Hounsfield unit (HU) in the selected regions of interest are reduced from about 350 to below 50 HU; on an anthropomorphic phantom, the error is reduced from 15.7% to 5.4%. The proposed method is attractive in applications where a high CBCT image quality is critical, for example, dose calculation in adaptive radiation therapy.
Abstract 15170: Persistent Microvascular Obstruction Leads to Localized Iron Deposition and Active Inflammation Within Chronic Myocardial Infarctions (2015)

Introduction: The mechanism by which persistent microvascular obstruction (PMO) post myocardial infarction (MI) exerts adverse long-term effects is not well understood. Hypothesis: We hypothesized that PMO, with or without reperfusion hemorrhage, can resolve into iron deposition within chronic MI (CMI) territories, and is associated with prolonged inflammation and adverse LV remodeling. Methods: Canines subjected to reperfused (n=17) and non-reperfused (n=16) MI underwent Cardiovascular Magnetic Resonance (CMR) at 7 (acute) and 56 days (chronic) post-MI. Cine, T2*-weighted and Late Gadolinium Enhancement images were used to characterize LV remodeling (End-Diastolic Sphericity Index (EDSI)), iron and PMO respectively. Histological analysis was used to examine chronic inflammation. Results: In the reperfused group, 9 canines had PMO and hemorrhage with subsequent chronic iron deposition (PMO+/T2*+), while 4 canines had no PMO, hemorrhage, or chronic iron deposition (PMO-/T2*-). The remaining 4 canines had PMO without hemorrhage (PMO+/T2*-), but all subsequently had chronic iron deposition. In the non-reperfused group, 15 canines had PMO, and acute and subsequent chronic iron deposition (NR-PMO+/T2*+); 1 canine had no PMO, acute or chronic iron deposition (NR-PMO-/T2*-). In both groups, PMO volume was significantly associated with both acute and chronic iron volumes (p<0.001 all cases). In both groups, infarct and iron volumes measured in both acute and chronic phases were significant predictors of change in EDSI between acute and chronic phases (p<0.01 all cases). Histological sections of the harvested hearts post day 56 CMR showed extensive newly recruited macrophage, IL-1β, TNF-α and MMP-9 activities highly localized with iron in CMI regions (p<0.001 all cases). Conclusions: PMO, with or without reperfusion hemorrhage, can lead to iron deposition within CMIs, and is associated with active inflammation and adverse LV remodeling in canines.
Bi-Modal Arterial Compliance Probe for Calibration-Free Cuffless Blood Pressure Estimation (2018)

Novel approach for calibration-free cuffless BP estimation; a potential tool for local BP measurement and hypertension screening.
Access Control Mechanism Based on Key Assignment and User Trust Level for Social Network Services (2013)

최근 인터넷이 웹 2.0 시대에 들어서면서부터 페이스북, 트위터, 유튜브 등과 같은 많은 소셜 네트워크 서비스들이 생겨났다. 이를 통해 사용자들은 온라인 상에서 다른 사용자들과 관계를 맺고 그룹에 가입할 수 있으며 타인의 생활을 실시간적으로 확인할 수 있다. 하지만 무방비한 온라인 상의 정보 노출은 악의적인 사용자들로 하여금 쉽게 타인의 개인정보를 수집하고 이용할 수 있게 만들 수 있다. 이에 본 논문에서는 개인 정보의 남용을 방지하고 권한이 부족한 사용자들이 타인의 개인 정보에 접근하는 것을 제어하기 위한 접근 제어 메커니즘을 제안한다. 본 논문에서는 제안하는 접근 제어 메커니즘은 마스터키를 핵심키와 부분키로 구분하고, 요청자의 평판도에 따라 접근 권한을 제한하는 특징을 가지고 있다. 이러한 제안 접근 제어 메커니즘의 성능 분석을 위해 기존 소셜 네트워크에서 고려하는 정보 보호 메커니즘과의 성능을 비교 분석한 결과 복잡도와 계산 시간 소모량 그리고 키 관리의 안전성 측면에서 성능 향상이 가능함을 확인할 수 있었다. Recently, as Internet enters WEB 2.0, many social network services through such as Facebook, Twitter and Youtube appeared. In these social network sites, users can easily make friends, join groups and access others personal information. Therefore, a malicious user can easily gather information of others. In order to protect user's personal information from the unauthenticated users, we propose privacy protection mechanism based on key assignment and user's trust level. A master-key is generated for each users and is segmented into a core-key and several sub-key. The master-key stores at the information owner's side and the sub-key will be distributed to requestor according to the relation and trust level. At last, in order to proof the efficiency, the performance of our proposed mechanism is compared with those of existing mechanisms.
Modeling design constraints and biasing in simulation using BDDs (2003)

Constraining and input biasing are frequently used techniques in functional verification methodologies based on randomized simulation generation. Constraints confine the simulation to a legal input space, while input biasing, which can be considered as a probabilistic constraint, makes it easier to cover interesting "corner" cases. In this paper, we propose to use constraints and biasing to form a simulation environment instead of using an explicit testbench in hierarchical functional verification. Both constraints and input biasing can depend on the state of the design and thus are very expressive in modeling the environment. We present a novel method that unifies the handling of constraints and biasing via the use of Binary Decision Diagrams (BDDs). The distribution of input vectors under the effect of constraints and input biasing are determined by what we refer to as the constrained probabilities. A BDD representing the constraints is first built, then an algorithm is applied to bias the branching probabilities in the BDD. During simulation, this annotated BDD is used to generate input vectors whose distribution matches their predetermined constrained probabilities. The simulation generation is a one-pass process, i.e., no backtracking or retry is needed. Also, we describe a partitioning method to minimize the size of BDDs used in simulation generation. Our techniques were used in the verification of a set of commercial designs; experimental results demonstrated their effectiveness.
A scheme for measuring subpath available bandwidth (2009)

This paper presents a novel probing scheme which can be used for estimating the available bandwidth of subpaths, without the requirement of control over both endpoints of a network path. Instead of a probe-packet receiver, this scheme uses the ICMP capability of routers. An estimate of the available bandwidth from the endpoint to a router is obtained in much the same way as for state-of-the-art end-to-end probing methods. Taking into account ICMP packet generation limitations and delay, the estimate should be interpreted as a lower bound of the actual available bandwidth. By combining estimates for several routers along a path, it is possible to obtain lower bound estimates also for subpaths between routers. These bounds may be further sharpened if combined with an estimate from an end-to-end measurement. From the obtained subpath bounds, it may be possible to identify a portion of the end-to-end path containing the bottleneck link. It is also possible to infer lower bounds for the individual router hops. In order to demonstrate the feasibility of this ICMP-based scheme, the paper reports on a measurement study conducted over the Internet.
Resilient end-to-end message protection for large-scale cyber-physical system communications (2012)

Essential features of cyber-physical systems such as Smart Grid are real-time analysis of high-resolution data, which a massive number of embedded devices periodically generate, and the effective and timely response to specific analytic results obtained from the data. Therefore, mission-critical data and control messages exchanged among machines in the cyber-physical systems must be strongly protected to prevent the infrastructures from becoming vulnerable. Specifically, the protection mechanism used must be scalable, secured from an end-to-end perspective, and key exposure resilient. Moreover, there may be privacy protection required among devices that generate data, e.g., smart metering. In this paper, we show that, for large-scale cyber-physical system communications, most well-known point-to-point security schemes such as IPsec [1], TLS [2], or SRTP [3] cannot meet the scalability, extensibility, and thinness requirements. By contrast conventional group security schemes which address the limitations of the point-to-point schemes have other limitations on aspects of privacy, key exposure resiliency, and key refreshment. To address the security requirements for cyber-physical systems, we design a resilient end-to-end message protection framework, REMP, exploiting the notion of the long-term key that is given on per node basis. This long term key is assigned during the node authentication phase and is subsequently used to derive encryption keys from a random number per-message sent. Compared with conventional schemes, REMP improves privacy, message authentication, and key exposure, and without compromising scalability and end-to-end security. The tradeoff is a slight increase in computation time for message decryption and message authentication.
Using thevenin equivalents to improve electricity delivery efficiency in AC and DC systems (2014)

A recent South African invention and internationally provisionally registered patent consists of multi-port electrical converters. The converter will inject or tap electric power at a point of common coupling (PCC) in such a way that the total power injected or drawn is transmitted from source to destination throughout an electrical network so that the losses associated with the transmission will be minimum. This applies to any m-number of wires. The wires voltages and currents can be DC, AC or a combination. The device does this by first determining in a novel way the dynamically changing Thévenin equivalent circuit at the point of common coupling (PCC). Some of the applications of the approach are: dispatching power from conventional, renewable sources, storage, as well as receiving power into a storage device or at a consumer point.
Ride quality meter (1984)

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Jack D. Leatherwood, Thomas K. Dempsey, Sherman A. Clevenson, David G. Stephens; Ride quality meter. J. Acoust. Soc. Am. 1 August 1984; 76 (2): 653. https://doi.org/10.1121/1.391144 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAcoustical Society of AmericaThe Journal of the Acoustical Society of America Search Advanced Search |Citation Search
Personalized expertise search at LinkedIn (2015)

Linkedln is the largest professional network with more than 350 million members. As the member base increases, searching for experts becomes more and more challenging. In this paper, we propose an approach to address the problem of personalized expertise search on LinkedIn, particularly for exploratory search queries containing skills. In the offline phase, we introduce a collaborative filtering approach based on matrix factorization. Our approach estimates expertise scores for both the skills that members list on their profiles as well as the skills they are likely to have but do not explicitly list. In the online phase (at query time) we use expertise scores on these skills as a feature in combination with other features to rank the results. To learn the personalized ranking function, we propose a heuristic to extract training data from search logs while handling position and sample selection biases. We tested our models on two products - LinkedIn homepage and LinkedIn recruiter. A/B tests showed significant improvements in click through rates - 31% for CTR@1 for recruiter (18% for homepage) as well as downstream messages sent from search - 37% for recruiter (20% for homepage). As of writing this paper, these models serve nearly all live traffic for skills search on LinkedIn homepage as well as LinkedIn recruiter.
Program insertion in real-time IP multicasts (1999)

We describe the design, implementation and operation of a prototype system which seamlessly mixes real-time audio and video streams originating from multiple, physically separated sources. Mixing is entirely decentralized, relying on new protocols to coordinate transfer of session control between IP multicast sources. The system is motivated by the desire to perform dynamic insertion of advertisements in active, real-time multimedia sessions. It permits content providers and viewers a far richer collection of relationships, opportunities, and features than possible with traditional broadcast media. Novel system features include 1) spontaneous meetings and business relationships between content providers, 2) program insertions from arbitrary locations on a multicast tree, 3) operation with no modifications to existing software players, 4) audience demographics from Real Time Control Protocol messages, and 5) mechanisms to allow users to select between multiple, simultaneous program transmissions. Additional system applications range from support of emergency broadcasts to the creation of novel virtual broadcasting networks .
Quantum cascade lasers in the 8-9 μm wavelength region (2002)

We have recently demonstrated intersubband unipolar lasers in the wavelength region between 4.2 and 4.6 /spl mu/m. In these devices light is generated by electronic transitions between conduction band subbands arising from size quantization in quantum wells. The emission wavelength is therefore controlled by the layer thicknesses and can be tailored in a wide spectral range using the same heterostructure material. We substantiate this claim and report QC lasers operating at more than twice the wavelength of the previous ones, proving that the same design criteria can be indeed extended to fabricate semiconductor lasers where the lasing transition is independent upon the material band gap.
The design and fabrication of microdisk resonators for terahertz frequency operation (2003)

The design and fabrication of resonators and waveguides, operating at THz frequencies are reported. Resonance frequencies, mode confinement, quality factors, and stop-bands were calculated for resonators with and without photonic elements. The estimations show that very narrow modes can exist within the propagation bandgap of a photonic lattice. Microdisk devices were designed and fabricated for high-quality whispering-gallery modes centered around 10 THz. Combined with silicon-germanium quantum wells grown by molecular beam epitaxy, these resonators are promising candidates for silicon-based miniature far-infrared lasers.
Identification of Bacterial DNA Markers for the Detection of Human Fecal Pollution in Water (2007)

We used genome fragment enrichment and bioinformatics to identify several microbial DNA sequences with high potential for use as markers in PCR assays for detection of human fecal contamination in water. Following competitive solution-phase hybridization of total DNA from human and pig fecal samples, 351 plasmid clones were sequenced and were determined to define 289 different genomic DNA regions. These putative human-specific fecal bacterial DNA sequences were then analyzed by dot blot hybridization, which confirmed that 98% were present in the source human fecal microbial community and absent from the original pig fecal DNA extract. Comparative sequence analyses of these sequences suggested that a large number (43.5%) were predicted to encode bacterial secreted or surface-associated proteins. Deoxyoligonucleotide primers capable of annealing to a subset of 26 of the candidate sequences predicted to encode factors involved in interactions with host cells were then used in the PCR and did not amplify markers in DNA from any additional pig fecal specimens. These 26 PCR assays exhibited a range of specificity in tests with 11 other animal sources, with more than half amplifying markers only in specimens from dogs or cats. Four assays were more specific, detecting markers only in specimens from humans, including those from 18 different human populations examined. We then demonstrated the potential utility of these assays by using them to detect human fecal contamination in several impacted watersheds.
Selective Polishing of Polysilicon during Fabrication of Microelectromechanical Systems Devices (2009)

During a typical microelectromechanical systems device fabrication process, a polysilicon top layer has to be polished with a slurry that yields a high polysilicon removal rate ( or more) and a high selectivity over the underlying silicon dioxide and silicon nitride layers . In this work, polysilicon polish rates as high as and selectivity over silicon dioxide and nitride of and , respectively, have been achieved using colloidal silica and calcined ceria-based slurries containing arginine or lysine mono hydrochloride, at down pressure. At , polysilicon polish rates close to and selectivities over both oxide and nitride that are close to 300 have been achieved. ξ potential, infrared spectroscopy, and contact angle data are used to explain the role of the amino acid additives in achieving the desired removal rate selectivities of polysilicon over silicon dioxide and silicon nitride.